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a3f97cbb
JW		 1/* Output Dwarf2 format symbol table information from the GNU C compiler.
2 Copyright (C) 1992, 1993, 1995, 1996 Free Software Foundation, Inc.
3 Contributed by Gary Funck (gary@intrepid.com). Derived from the
4 DWARF 1 implementation written by Ron Guilmette (rfg@monkeys.com).
5
6This file is part of GNU CC.
7
8GNU CC is free software; you can redistribute it and/or modify
9it under the terms of the GNU General Public License as published by
10the Free Software Foundation; either version 2, or (at your option)
11any later version.
12
13GNU CC is distributed in the hope that it will be useful,
14but WITHOUT ANY WARRANTY; without even the implied warranty of
15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16GNU General Public License for more details.
17
18You should have received a copy of the GNU General Public License
19along with GNU CC; see the file COPYING. If not, write to
20the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
21
22#include "config.h"
23
9a666dda 24#ifdef DWARF2_DEBUGGING_INFO
a3f97cbb
JW		 25#include <stdio.h>
26#include "dwarf2.h"
27#include "tree.h"
28#include "flags.h"
29#include "rtl.h"
30#include "hard-reg-set.h"
31#include "regs.h"
32#include "insn-config.h"
33#include "reload.h"
34#include "output.h"
35#include "defaults.h"
36
37/* #define NDEBUG 1 */
38#include "assert.h"
a3f97cbb
JW		 39
40extern char *getpwd ();
a3f97cbb
JW		 41
42/* IMPORTANT NOTE: Please see the file README.DWARF for important details
43 regarding the GNU implementation of DWARF. */
44
45/* NOTE: In the comments in this file, many references are made to
46 "Debugging Information Entries". This term is abbreviated as `DIE'
47 throughout the remainder of this file. */
48
a3f97cbb
JW		 49#if defined(__GNUC__) && (NDEBUG == 1)
50#define inline static inline
51#else
52#define inline static
53#endif
54
55
56/* An internal representation of the DWARF output is built, and then
57 walked to generate the DWARF debugging info. The walk of the internal
58 representation is done after the entire program has been compiled.
59 The types below are used to describe the internal representation. */
60
61/* Each DIE may have a series of attribute/value pairs. Values
62 can take on several forms. The forms that are used in this
63 impelementation are listed below. */
64typedef enum
65 {
66 dw_val_class_addr,
67 dw_val_class_loc,
68 dw_val_class_const,
69 dw_val_class_unsigned_const,
70 dw_val_class_double_const,
71 dw_val_class_flag,
72 dw_val_class_die_ref,
73 dw_val_class_fde_ref,
74 dw_val_class_lbl_id,
75 dw_val_class_section_offset,
76 dw_val_class_str
77 }
78dw_val_class;
79
80/* Various DIE's use offsets relative to the beginning of the
81 .debug_info section to refer to each other. */
82typedef long int dw_offset;
83
84/* Define typedefs here to avoid circular dependencies. */
85typedef struct die_struct *dw_die_ref;
86typedef struct dw_attr_struct *dw_attr_ref;
87typedef struct dw_val_struct *dw_val_ref;
88typedef struct dw_line_info_struct *dw_line_info_ref;
e90b62db 89typedef struct dw_separate_line_info_struct *dw_separate_line_info_ref;
a3f97cbb
JW		 90typedef struct dw_loc_descr_struct *dw_loc_descr_ref;
91typedef struct dw_cfi_struct *dw_cfi_ref;
92typedef struct dw_fde_struct *dw_fde_ref;
93typedef union dw_cfi_oprnd_struct *dw_cfi_oprnd_ref;
d291dd49
JM		 94typedef struct pubname_struct *pubname_ref;
95typedef dw_die_ref *arange_ref;
a3f97cbb
JW		 96
97/* Describe a double word constant value. */
98typedef struct dw_double_const_struct
99 {
100 unsigned long dw_dbl_hi;
101 unsigned long dw_dbl_low;
102 }
103dw_dbl_const;
104
105/* Each entry in the line_info_table maintains the file and
106 line nuber associated with the label generated for that
107 entry. The label gives the PC value associated with
108 the line number entry. */
109typedef struct dw_line_info_struct
110 {
111 unsigned long dw_file_num;
112 unsigned long dw_line_num;
113 }
114dw_line_info_entry;
115
e90b62db
JM		 116/* Line information for functions in separate sections; each one gets its
117 own sequence. */
118typedef struct dw_separate_line_info_struct
119 {
120 unsigned long dw_file_num;
121 unsigned long dw_line_num;
122 unsigned long function;
123 }
124dw_separate_line_info_entry;
125
a3f97cbb
JW		 126/* The dw_val_node describes an attibute's value, as it is
127 represnted internally. */
128typedef struct dw_val_struct
129 {
130 dw_val_class val_class;
131 union
132 {
133 char *val_addr;
134 dw_loc_descr_ref val_loc;
135 long int val_int;
136 long unsigned val_unsigned;
137 dw_dbl_const val_dbl_const;
138 dw_die_ref val_die_ref;
139 unsigned val_fde_index;
140 char *val_str;
141 char *val_lbl_id;
142 char *val_section;
143 unsigned char val_flag;
144 }
145 v;
146 }
147dw_val_node;
148
149/* Locations in memory are described using a sequence of stack machine
150 operations. */
151typedef struct dw_loc_descr_struct
152 {
153 dw_loc_descr_ref dw_loc_next;
154 enum dwarf_location_atom dw_loc_opc;
155 dw_val_node dw_loc_oprnd1;
156 dw_val_node dw_loc_oprnd2;
157 }
158dw_loc_descr_node;
159
160/* Each DIE attribute has a field specifying the attribute kind,
161 a link to the next attribute in the chain, and an attribute value.
162 Attributes are typically linked below the DIE they modify. */
163typedef struct dw_attr_struct
164 {
165 enum dwarf_attribute dw_attr;
166 dw_attr_ref dw_attr_next;
167 dw_val_node dw_attr_val;
168 }
169dw_attr_node;
170
171/* Call frames are described using a sequence of Call Frame
172 Information instructions. The register number, offset
173 and address fields are provided as possible operands;
174 their use is selected by the opcode field. */
175typedef union dw_cfi_oprnd_struct
176 {
177 unsigned long dw_cfi_reg_num;
178 long int dw_cfi_offset;
179 char *dw_cfi_addr;
180 }
181dw_cfi_oprnd;
182
183typedef struct dw_cfi_struct
184 {
185 dw_cfi_ref dw_cfi_next;
186 enum dwarf_call_frame_info dw_cfi_opc;
187 dw_cfi_oprnd dw_cfi_oprnd1;
188 dw_cfi_oprnd dw_cfi_oprnd2;
189 }
190dw_cfi_node;
191
192/* All call frame descriptions (FDE's) in the GCC generated DWARF
4b674448 193 refer to a single Common Information Entry (CIE), defined at
a3f97cbb
JW		 194 the beginning of the .debug_frame section. This used of a single
195 CIE obviates the need to keep track of multiple CIE's
196 in the DWARF generation routines below. */
197typedef struct dw_fde_struct
198 {
199 unsigned long dw_fde_offset;
200 char *dw_fde_begin;
a94dbf2c 201 char *dw_fde_current_label;
a3f97cbb
JW		 202 char *dw_fde_end;
203 dw_cfi_ref dw_fde_cfi;
204 }
205dw_fde_node;
206
207/* The Debugging Information Entry (DIE) structure */
208typedef struct die_struct
209 {
210 enum dwarf_tag die_tag;
211 dw_attr_ref die_attr;
212 dw_attr_ref die_attr_last;
213 dw_die_ref die_parent;
214 dw_die_ref die_child;
215 dw_die_ref die_child_last;
216 dw_die_ref die_sib;
217 dw_offset die_offset;
218 unsigned long die_abbrev;
219 }
220die_node;
221
d291dd49
JM		 222/* The pubname structure */
223typedef struct pubname_struct
224{
225 dw_die_ref die;
226 char * name;
227}
228pubname_entry;
229
a3f97cbb
JW		 230/* How to start an assembler comment. */
231#ifndef ASM_COMMENT_START
232#define ASM_COMMENT_START ";#"
233#endif
234
5c90448c
JM		 235/* Define a macro which returns non-zero for a TYPE_DECL which was
236 implicitly generated for a tagged type.
237
238 Note that unlike the gcc front end (which generates a NULL named
239 TYPE_DECL node for each complete tagged type, each array type, and
240 each function type node created) the g++ front end generates a
241 _named_ TYPE_DECL node for each tagged type node created.
242 These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to
243 generate a DW_TAG_typedef DIE for them. */
244#define TYPE_DECL_IS_STUB(decl) \
245 (DECL_NAME (decl) == NULL \
246 || (DECL_ARTIFICIAL (decl) \
247 && is_tagged_type (TREE_TYPE (decl)) \
248 && decl == TYPE_STUB_DECL (TREE_TYPE (decl))))
249
a3f97cbb
JW		 250/* Information concerning the compilation unit's programming
251 language, and compiler version. */
252extern int flag_traditional;
253extern char *version_string;
254extern char *language_string;
255
256/* Maximum size (in bytes) of an artificially generated label. */
257#define MAX_ARTIFICIAL_LABEL_BYTES 30
258
259/* Make sure we know the sizes of the various types dwarf can describe. These
260 are only defaults. If the sizes are different for your target, you should
261 override these values by defining the appropriate symbols in your tm.h
262 file. */
263#ifndef CHAR_TYPE_SIZE
264#define CHAR_TYPE_SIZE BITS_PER_UNIT
265#endif
a3f97cbb 266#ifndef PTR_SIZE
a9d38797 267#define PTR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
a3f97cbb
JW		 268#endif
269
7e23cb16
JM		 270/* The size in bytes of a DWARF field indicating an offset or length
271 relative to a debug info section, specified to be 4 bytes in the DWARF-2
272 specification. The SGI/MIPS ABI defines it to be the same as PTR_SIZE. */
273#ifndef DWARF_OFFSET_SIZE
274#define DWARF_OFFSET_SIZE 4
275#endif
276
9a666dda
JM		 277#define DWARF_VERSION 2
278
a3f97cbb 279/* Fixed size portion of the DWARF compilation unit header. */
7e23cb16 280#define DWARF_COMPILE_UNIT_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 3)
a3f97cbb
JW		 281
282/* Fixed size portion of debugging line information prolog. */
283#define DWARF_LINE_PROLOG_HEADER_SIZE 5
284
285/* Fixed size portion of public names info. */
7e23cb16
JM		 286#define DWARF_PUBNAMES_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2)
287
288/* Round SIZE up to the nearest BOUNDARY. */
289#define DWARF_ROUND(SIZE,BOUNDARY) \
290 (((SIZE) + (BOUNDARY) - 1) & ~((BOUNDARY) - 1))
a3f97cbb
JW		 291
292/* Fixed size portion of the address range info. */
7e23cb16
JM		 293#define DWARF_ARANGES_HEADER_SIZE \
294 (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, PTR_SIZE * 2) - DWARF_OFFSET_SIZE)
a3f97cbb 295
c8cc5c4a 296/* Fixed size portion of the CIE (including the length field). */
a94dbf2c 297#define DWARF_CIE_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 5)
a3f97cbb 298
a94dbf2c
JM		 299/* The un-padded size of the CIE. Initialized in calc_fde_sizes, used
300 in output_call_frame_info. */
301static unsigned cie_size;
a3f97cbb
JW		 302
303/* Offsets recorded in opcodes are a multiple of this alignment factor. */
304#define DWARF_CIE_DATA_ALIGNMENT -4
305
306/* Fixed size portion of the FDE. */
7e23cb16 307#define DWARF_FDE_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2 * PTR_SIZE)
a3f97cbb
JW		 308
309/* Define the architecture-dependent minimum instruction length (in bytes).
310 In this implementation of DWARF, this field is used for information
311 purposes only. Since GCC generates assembly language, we have
312 no a priori knowledge of how many instruction bytes are generated
313 for each source line, and therefore can use only the DW_LNE_set_address
314 and DW_LNS_fixed_advance_pc line information commands. */
315#ifndef DWARF_LINE_MIN_INSTR_LENGTH
316#define DWARF_LINE_MIN_INSTR_LENGTH 4
317#endif
318
319/* Minimum line offset in a special line info. opcode.
320 This value was chosen to give a reasonable range of values. */
321#define DWARF_LINE_BASE -10
322
323/* First special line opcde - leave room for the standard opcodes. */
324#define DWARF_LINE_OPCODE_BASE 10
325
326/* Range of line offsets in a special line info. opcode. */
327#define DWARF_LINE_RANGE (254-DWARF_LINE_OPCODE_BASE+1)
328
329/* Flag that indicates the initial value of the is_stmt_start flag.
330 In the present implementation, we do not mark any lines as
331 the beginning of a source statement, because that information
332 is not made available by the GCC front-end. */
333#define DWARF_LINE_DEFAULT_IS_STMT_START 1
334
335/* This location is used by calc_die_sizes() to keep track
336 the offset of each DIE within the .debug_info section. */
337static unsigned long next_die_offset;
338
339/* This location is used by calc_fde_sizes() to keep track
340 the offset of each FDE within the .debug_frame section. */
341static unsigned long next_fde_offset;
342
343/* Record the root of the DIE's built for the current compilation unit. */
344dw_die_ref comp_unit_die;
345
a94dbf2c
JM		 346/* The number of DIEs with a NULL parent waiting to be relocated. */
347static int limbo_die_count;
348
a3f97cbb
JW		 349/* Pointer to an array of filenames referenced by this compilation unit. */
350static char **file_table;
351
352/* Total number of entries in the table (i.e. array) pointed to by
353 `file_table'. This is the *total* and includes both used and unused
354 slots. */
355static unsigned file_table_allocated;
356
357/* Number of entries in the file_table which are actually in use. */
358static unsigned file_table_in_use;
359
360/* Size (in elements) of increments by which we may expand the filename
361 table. */
362#define FILE_TABLE_INCREMENT 64
363
364/* Local pointer to the name of the main input file. Initialized in
9a666dda 365 dwarf2out_init. */
a3f97cbb
JW		 366static char *primary_filename;
367
368/* For Dwarf output, we must assign lexical-blocks id numbers in the order in
369 which their beginnings are encountered. We output Dwarf debugging info
370 that refers to the beginnings and ends of the ranges of code for each
371 lexical block. The labels themselves are generated in final.c, which
372 assigns numbers to the blocks in the same way. */
373static unsigned next_block_number = 2;
374
a3f97cbb
JW		 375/* A pointer to the base of a table of references to DIE's that describe
376 declarations. The table is indexed by DECL_UID() which is a unique
377 number, indentifying each decl. */
378static dw_die_ref *decl_die_table;
379
380/* Number of elements currently allocated for the decl_die_table. */
381static unsigned decl_die_table_allocated;
382
383/* Number of elements in decl_die_table currently in use. */
384static unsigned decl_die_table_in_use;
385
386/* Size (in elements) of increments by which we may expand the
387 decl_die_table. */
388#define DECL_DIE_TABLE_INCREMENT 256
389
390/* A pointer to the base of a table of references to declaration
391 scopes. This table is a display which tracks the nesting
392 of declaration scopes at the current scope and containing
393 scopes. This table is used to find the proper place to
394 define type declaration DIE's. */
395static tree *decl_scope_table;
396
397/* Number of elements currently allocated for the decl_scope_table. */
398static unsigned decl_scope_table_allocated;
399
400/* Current level of nesting of declataion scopes. */
401static unsigned decl_scope_depth;
402
403/* Size (in elements) of increments by which we may expand the
404 decl_scope_table. */
405#define DECL_SCOPE_TABLE_INCREMENT 64
406
407/* A pointer to the base of a list of references to DIE's that
408 are uniquely identified by their tag, presence/absence of
409 children DIE's, and list of attribute/value pairs. */
410static dw_die_ref *abbrev_die_table;
411
412/* Number of elements currently allocated for abbrev_die_table. */
413static unsigned abbrev_die_table_allocated;
414
415/* Number of elements in type_die_table currently in use. */
416static unsigned abbrev_die_table_in_use;
417
418/* Size (in elements) of increments by which we may expand the
419 abbrev_die_table. */
420#define ABBREV_DIE_TABLE_INCREMENT 256
421
422/* A pointer to the base of a table that contains line information
e90b62db 423 for each source code line in .text in the compilation unit. */
a3f97cbb
JW		 424static dw_line_info_ref line_info_table;
425
426/* Number of elements currently allocated for line_info_table. */
427static unsigned line_info_table_allocated;
428
e90b62db
JM		 429/* Number of elements in separate_line_info_table currently in use. */
430static unsigned separate_line_info_table_in_use;
431
432/* A pointer to the base of a table that contains line information
433 for each source code line outside of .text in the compilation unit. */
434static dw_separate_line_info_ref separate_line_info_table;
435
436/* Number of elements currently allocated for separate_line_info_table. */
437static unsigned separate_line_info_table_allocated;
438
a3f97cbb
JW		 439/* Number of elements in line_info_table currently in use. */
440static unsigned line_info_table_in_use;
441
442/* Size (in elements) of increments by which we may expand the
443 line_info_table. */
444#define LINE_INFO_TABLE_INCREMENT 1024
445
a3f97cbb
JW		 446/* A pointer to the base of a table that contains frame description
447 information for each routine. */
448static dw_fde_ref fde_table;
449
450/* Number of elements currently allocated for fde_table. */
451static unsigned fde_table_allocated;
452
453/* Number of elements in fde_table currently in use. */
454static unsigned fde_table_in_use;
455
456/* Size (in elements) of increments by which we may expand the
457 fde_table. */
458#define FDE_TABLE_INCREMENT 256
459
a94dbf2c
JM		 460/* A list of call frame insns for the CIE. */
461static dw_cfi_ref cie_cfi_head;
462
d291dd49
JM		 463/* A pointer to the base of a table that contains a list of publicly
464 accessible names. */
465static pubname_ref pubname_table;
466
467/* Number of elements currently allocated for pubname_table. */
468static unsigned pubname_table_allocated;
469
470/* Number of elements in pubname_table currently in use. */
471static unsigned pubname_table_in_use;
472
473/* Size (in elements) of increments by which we may expand the
474 pubname_table. */
475#define PUBNAME_TABLE_INCREMENT 64
476
477/* A pointer to the base of a table that contains a list of publicly
478 accessible names. */
479static arange_ref arange_table;
480
481/* Number of elements currently allocated for arange_table. */
482static unsigned arange_table_allocated;
483
484/* Number of elements in arange_table currently in use. */
485static unsigned arange_table_in_use;
486
487/* Size (in elements) of increments by which we may expand the
488 arange_table. */
489#define ARANGE_TABLE_INCREMENT 64
490
a94dbf2c
JM		 491/* A pointer to the base of a list of pending types which we haven't
492 generated DIEs for yet, but which we will have to come back to
493 later on. */
494
495static tree *pending_types_list;
496
497/* Number of elements currently allocated for the pending_types_list. */
498
499static unsigned pending_types_allocated;
500
501/* Number of elements of pending_types_list currently in use. */
502
503static unsigned pending_types;
504
505/* Size (in elements) of increments by which we may expand the pending
506 types list. Actually, a single hunk of space of this size should
507 be enough for most typical programs. */
508
509#define PENDING_TYPES_INCREMENT 64
510
a3f97cbb
JW		 511/* The number of the current function definition for which debugging
512 information is being generated. These numbers range from 1 up to the
513 maximum number of function definitions contained within the current
514 compilation unit. These numbers are used to create unique label id's
515 unique to each function definition. */
516static unsigned current_funcdef_number = 1;
517
518/* Some DWARF extensions (e.g., MIPS/SGI) implement a subprogram
519 attribute that accelerates the lookup of the FDE associated
520 with the subprogram. This variable holds the table index of the FDE
521 associated with the current function (body) definition. */
522static unsigned current_funcdef_fde;
523
7e23cb16
JM		 524/* Record whether the function being analyzed contains inlined functions. */
525static int current_function_has_inlines;
526static int comp_unit_has_inlines;
527
a3f97cbb
JW		 528/* A pointer to the ..._DECL node which we have most recently been working
529 on. We keep this around just in case something about it looks screwy and
530 we want to tell the user what the source coordinates for the actual
531 declaration are. */
532static tree dwarf_last_decl;
533
a3f97cbb
JW		 534/* Forward declarations for functions defined in this file. */
535static void gen_type_die ();
536static void add_type_attribute ();
537static void decls_for_scope ();
538static void gen_decl_die ();
539static unsigned lookup_filename ();
7e23cb16 540static int constant_size PROTO((long unsigned));
f37230f0 541static enum dwarf_form value_format PROTO((dw_val_ref));
a94dbf2c 542static unsigned reg_number ();
a3f97cbb
JW		 543
544/* Definitions of defaults for assembler-dependent names of various
545 pseudo-ops and section names.
546 Theses may be overridden in the tm.h file (if necessary) for a particular
547 assembler. */
548#ifndef UNALIGNED_SHORT_ASM_OP
549#define UNALIGNED_SHORT_ASM_OP ".2byte"
550#endif
551#ifndef UNALIGNED_INT_ASM_OP
552#define UNALIGNED_INT_ASM_OP ".4byte"
553#endif
7e23cb16
JM		 554#ifndef UNALIGNED_DOUBLE_INT_ASM_OP
555#define UNALIGNED_DOUBLE_INT_ASM_OP ".8byte"
556#endif
a3f97cbb
JW		 557#ifndef ASM_BYTE_OP
558#define ASM_BYTE_OP ".byte"
559#endif
560
7e23cb16
JM		 561#ifndef UNALIGNED_OFFSET_ASM_OP
562#define UNALIGNED_OFFSET_ASM_OP \
563 (DWARF_OFFSET_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
564#endif
565
566#ifndef UNALIGNED_WORD_ASM_OP
567#define UNALIGNED_WORD_ASM_OP \
568 (PTR_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
569#endif
570
571/* Data and reference forms for relocatable data. */
572#define DW_FORM_data (DWARF_OFFSET_SIZE == 8 ? DW_FORM_data8 : DW_FORM_data4)
573#define DW_FORM_ref (DWARF_OFFSET_SIZE == 8 ? DW_FORM_ref8 : DW_FORM_ref4)
574
a3f97cbb
JW		 575/* Pseudo-op for defining a new section. */
576#ifndef SECTION_ASM_OP
577#define SECTION_ASM_OP ".section"
578#endif
579
580/* The default format used by the ASM_OUTPUT_SECTION macro (see below) to
581 print the SECTION_ASM_OP and the section name. The default here works for
582 almost all svr4 assemblers, except for the sparc, where the section name
583 must be enclosed in double quotes. (See sparcv4.h). */
584#ifndef SECTION_FORMAT
585#define SECTION_FORMAT "\t%s\t%s\n"
586#endif
587
588/* Section names used to hold DWARF debugging information. */
589#ifndef DEBUG_SECTION
590#define DEBUG_SECTION ".debug_info"
591#endif
592#ifndef ABBREV_SECTION
593#define ABBREV_SECTION ".debug_abbrev"
594#endif
595#ifndef ARANGES_SECTION
596#define ARANGES_SECTION ".debug_aranges"
597#endif
598#ifndef DW_MACINFO_SECTION
599#define DW_MACINFO_SECTION ".debug_macinfo"
600#endif
601#ifndef FRAME_SECTION
602#define FRAME_SECTION ".debug_frame"
603#endif
604#ifndef LINE_SECTION
605#define LINE_SECTION ".debug_line"
606#endif
607#ifndef LOC_SECTION
608#define LOC_SECTION ".debug_loc"
609#endif
610#ifndef PUBNAMES_SECTION
611#define PUBNAMES_SECTION ".debug_pubnames"
612#endif
613#ifndef STR_SECTION
614#define STR_SECTION ".debug_str"
615#endif
616
617/* Standerd ELF section names for compiled code and data. */
618#ifndef TEXT_SECTION
619#define TEXT_SECTION ".text"
620#endif
621#ifndef DATA_SECTION
622#define DATA_SECTION ".data"
623#endif
a3f97cbb
JW		 624#ifndef BSS_SECTION
625#define BSS_SECTION ".bss"
626#endif
627
628
629/* Definitions of defaults for formats and names of various special
630 (artificial) labels which may be generated within this file (when the -g
631 options is used and DWARF_DEBUGGING_INFO is in effect.
632 If necessary, these may be overridden from within the tm.h file, but
5c90448c
JM		 633 typically, overriding these defaults is unnecessary. */
634
635char text_end_label[MAX_ARTIFICIAL_LABEL_BYTES];
636
a3f97cbb 637#ifndef TEXT_END_LABEL
5c90448c 638#define TEXT_END_LABEL "Letext"
a3f97cbb
JW		 639#endif
640#ifndef DATA_END_LABEL
5c90448c 641#define DATA_END_LABEL "Ledata"
a3f97cbb
JW		 642#endif
643#ifndef BSS_END_LABEL
5c90448c 644#define BSS_END_LABEL "Lebss"
a3f97cbb
JW		 645#endif
646#ifndef INSN_LABEL_FMT
5c90448c 647#define INSN_LABEL_FMT "LI%u_"
a3f97cbb 648#endif
5c90448c
JM		 649#ifndef BLOCK_BEGIN_LABEL
650#define BLOCK_BEGIN_LABEL "LBB"
a3f97cbb 651#endif
5c90448c
JM		 652#ifndef BLOCK_END_LABEL
653#define BLOCK_END_LABEL "LBE"
a3f97cbb 654#endif
5c90448c
JM		 655#ifndef BODY_BEGIN_LABEL
656#define BODY_BEGIN_LABEL "Lbb"
a3f97cbb 657#endif
5c90448c
JM		 658#ifndef BODY_END_LABEL
659#define BODY_END_LABEL "Lbe"
d291dd49 660#endif
5c90448c
JM		 661#ifndef FUNC_BEGIN_LABEL
662#define FUNC_BEGIN_LABEL "LFB"
a3f97cbb 663#endif
5c90448c
JM		 664#ifndef FUNC_END_LABEL
665#define FUNC_END_LABEL "LFE"
a3f97cbb 666#endif
5c90448c
JM		 667#ifndef LINE_CODE_LABEL
668#define LINE_CODE_LABEL "LM"
e90b62db 669#endif
5c90448c
JM		 670#ifndef SEPARATE_LINE_CODE_LABEL
671#define SEPARATE_LINE_CODE_LABEL "LSM"
a3f97cbb
JW		 672#endif
673
a3f97cbb
JW		 674/* Definitions of defaults for various types of primitive assembly language
675 output operations. These may be overridden from within the tm.h file,
676 but typically, that is unecessary. */
677#ifndef ASM_OUTPUT_SECTION
678#define ASM_OUTPUT_SECTION(FILE, SECTION) \
679 fprintf ((FILE), SECTION_FORMAT, SECTION_ASM_OP, SECTION)
680#endif
681
682#ifndef ASM_OUTPUT_DWARF_DELTA2
683#define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
684 do { fprintf ((FILE), "\t%s\t", UNALIGNED_SHORT_ASM_OP); \
685 assemble_name (FILE, LABEL1); \
686 fprintf (FILE, "-"); \
687 assemble_name (FILE, LABEL2); \
688 } while (0)
689#endif
690
691#ifndef ASM_OUTPUT_DWARF_DELTA4
692#define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
693 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
694 assemble_name (FILE, LABEL1); \
695 fprintf (FILE, "-"); \
696 assemble_name (FILE, LABEL2); \
697 } while (0)
698#endif
699
7e23cb16
JM		 700#ifndef ASM_OUTPUT_DWARF_DELTA
701#define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
702 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
703 assemble_name (FILE, LABEL1); \
704 fprintf (FILE, "-"); \
705 assemble_name (FILE, LABEL2); \
706 } while (0)
707#endif
708
709#ifndef ASM_OUTPUT_DWARF_ADDR_DELTA
710#define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
711 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
712 assemble_name (FILE, LABEL1); \
713 fprintf (FILE, "-"); \
714 assemble_name (FILE, LABEL2); \
715 } while (0)
716#endif
717
a3f97cbb
JW		 718#ifndef ASM_OUTPUT_DWARF_ADDR
719#define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
7e23cb16 720 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
a3f97cbb
JW		 721 assemble_name (FILE, LABEL); \
722 } while (0)
723#endif
724
725#ifndef ASM_OUTPUT_DWARF_ADDR_CONST
726#define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,ADDR) \
7e23cb16
JM		 727 fprintf ((FILE), "\t%s\t%s", UNALIGNED_WORD_ASM_OP, (ADDR))
728#endif
729
730#ifndef ASM_OUTPUT_DWARF_OFFSET
731#define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
732 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
733 assemble_name (FILE, LABEL); \
734 } while (0)
a3f97cbb
JW		 735#endif
736
737#ifndef ASM_OUTPUT_DWARF_DATA1
738#define ASM_OUTPUT_DWARF_DATA1(FILE,VALUE) \
739 fprintf ((FILE), "\t%s\t0x%x", ASM_BYTE_OP, VALUE)
740#endif
741
742#ifndef ASM_OUTPUT_DWARF_DATA2
743#define ASM_OUTPUT_DWARF_DATA2(FILE,VALUE) \
744 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_SHORT_ASM_OP, (unsigned) VALUE)
745#endif
746
747#ifndef ASM_OUTPUT_DWARF_DATA4
748#define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
749 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_INT_ASM_OP, (unsigned) VALUE)
750#endif
751
7e23cb16
JM		 752#ifndef ASM_OUTPUT_DWARF_DATA
753#define ASM_OUTPUT_DWARF_DATA(FILE,VALUE) \
754 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_OFFSET_ASM_OP, \
755 (unsigned long) VALUE)
756#endif
757
758#ifndef ASM_OUTPUT_DWARF_ADDR_DATA
759#define ASM_OUTPUT_DWARF_ADDR_DATA(FILE,VALUE) \
760 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_WORD_ASM_OP, \
761 (unsigned long) VALUE)
762#endif
763
a3f97cbb
JW		 764#ifndef ASM_OUTPUT_DWARF_DATA8
765#define ASM_OUTPUT_DWARF_DATA8(FILE,HIGH_VALUE,LOW_VALUE) \
766 do { \
767 if (WORDS_BIG_ENDIAN) \
768 { \
769 fprintf ((FILE), "\t%s\t0x%x\n", UNALIGNED_INT_ASM_OP, HIGH_VALUE); \
770 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_INT_ASM_OP, LOW_VALUE);\
771 } \
772 else \
773 { \
774 fprintf ((FILE), "\t%s\t0x%x\n", UNALIGNED_INT_ASM_OP, LOW_VALUE);\
775 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_INT_ASM_OP, HIGH_VALUE); \
776 } \
777 } while (0)
778#endif
779
780/* This is similar to the default ASM_OUTPUT_ASCII, except that no trailing
781 newline is produced. When flag_verbose_asm is asserted, we add commnetary
782 at the end of the line, so we must avoid output of a newline here. */
783#ifndef ASM_OUTPUT_DWARF_STRING
784#define ASM_OUTPUT_DWARF_STRING(FILE,P) \
785 do { \
786 register int slen = strlen(P); \
787 register char *p = (P); \
788 register int i; \
789 fprintf (FILE, "\t.ascii \""); \
790 for (i = 0; i < slen; i++) \
791 { \
792 register int c = p[i]; \
793 if (c == '\"' || c == '\\') \
794 putc ('\\', FILE); \
795 if (c >= ' ' && c < 0177) \
796 putc (c, FILE); \
797 else \
798 { \
799 fprintf (FILE, "\\%o", c); \
800 } \
801 } \
802 fprintf (FILE, "\\0\""); \
803 } \
804 while (0)
805#endif
806
807/* Convert a reference to the assembler name of a C-level name. This
808 macro has the same effect as ASM_OUTPUT_LABELREF, but copies to
809 a string rather than writing to a file. */
810#ifndef ASM_NAME_TO_STRING
811#define ASM_NAME_TO_STRING(STR, NAME) \
812 do { \
813 if ((NAME)[0] == '*') \
814 strcpy (STR, NAME+1); \
815 else \
816 strcpy (STR, NAME); \
817 } \
818 while (0)
819#endif
820
c8cc5c4a 821/* The DWARF 2 CFA column which tracks the return address. Normally this
a94dbf2c
JM		 822 is the column for PC, or the first column after all of the hard
823 registers. */
c8cc5c4a 824#ifndef DWARF_FRAME_RETURN_COLUMN
a94dbf2c
JM		 825#ifdef PC_REGNUM
826#define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM)
827#else
828#define DWARF_FRAME_RETURN_COLUMN FIRST_PSEUDO_REGISTER + 1
829#endif
c8cc5c4a
JM		 830#endif
831
832/* The mapping from gcc register number to DWARF 2 CFA column number. By
833 default, we provide columns for all registers after the CFA column. */
834#ifndef DWARF_FRAME_REGNUM
835#define DWARF_FRAME_REGNUM(REG) (DBX_REGISTER_NUMBER (REG) + 1)
836#endif
a3f97cbb
JW		 837\f
838/************************ general utility functions **************************/
839
840/* Return a pointer to a copy of the section string name 's' with all
841 attributes stripped off. */
842inline char *
843stripattributes (s)
844 register char *s;
845{
846 register char *stripped, *p;
847 stripped = xstrdup (s);
848 p = stripped;
849 while (*p && *p != ',')
850 p++;
851 *p = '\0';
852 return stripped;
853}
854
855/* Convert an integer constant expression into assembler syntax.
856 Addition and subtraction are the only arithmetic
857 that may appear in these expressions. This is an adaptation
858 of output_addr_const() in final.c. Here, the target of the
859 conversion is a string buffer. We can't use output_addr_const
860 directly, because it writes to a file. */
861static void
862addr_const_to_string (str, x)
863 char *str;
864 rtx x;
865{
866 char buf1[256];
867 char buf2[256];
868
869restart:
870 str[0] = '\0';
871 switch (GET_CODE (x))
872 {
873 case PC:
874 if (flag_pic)
875 strcat (str, ",");
876 else
877 abort ();
878 break;
879
880 case SYMBOL_REF:
881 ASM_NAME_TO_STRING (buf1, XSTR (x, 0));
882 strcat (str, buf1);
883 break;
884
885 case LABEL_REF:
886 ASM_GENERATE_INTERNAL_LABEL (buf1, "L", CODE_LABEL_NUMBER (XEXP (x, 0)));
887 ASM_NAME_TO_STRING (buf2, buf1);
888 strcat (str, buf2);
889 break;
890
891 case CODE_LABEL:
892 ASM_GENERATE_INTERNAL_LABEL (buf1, "L", CODE_LABEL_NUMBER (x));
893 ASM_NAME_TO_STRING (buf2, buf1);
894 strcat (str, buf2);
895 break;
896
897 case CONST_INT:
898 sprintf (buf1,
899#if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT
900 "%d",
901#else
902 "%ld",
903#endif
904 INTVAL (x));
905 strcat (str, buf1);
906 break;
907
908 case CONST:
909 /* This used to output parentheses around the expression, but that does
910 not work on the 386 (either ATT or BSD assembler). */
911 addr_const_to_string (buf1, XEXP (x, 0));
912 strcat (str, buf1);
913 break;
914
915 case CONST_DOUBLE:
916 if (GET_MODE (x) == VOIDmode)
917 {
918 /* We can use %d if the number is one word and positive. */
919 if (CONST_DOUBLE_HIGH (x))
920 sprintf (buf1,
921#if HOST_BITS_PER_WIDE_INT == 64
922#if HOST_BITS_PER_WIDE_INT != HOST_BITS_PER_INT
923 "0x%lx%016lx",
924#else
925 "0x%x%016x",
926#endif
927#else
928#if HOST_BITS_PER_WIDE_INT != HOST_BITS_PER_INT
929 "0x%lx%08lx",
930#else
931 "0x%x%08x",
932#endif
933#endif
934 CONST_DOUBLE_HIGH (x), CONST_DOUBLE_LOW (x));
935 else if (CONST_DOUBLE_LOW (x) < 0)
936 sprintf (buf1,
937#if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT
938 "0x%x",
939#else
940 "0x%lx",
941#endif
942 CONST_DOUBLE_LOW (x));
943 else
944 sprintf (buf1,
945#if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT
946 "%d",
947#else
948 "%ld",
949#endif
950 CONST_DOUBLE_LOW (x));
951 strcat (str, buf1);
952 }
953 else
954 /* We can't handle floating point constants; PRINT_OPERAND must
955 handle them. */
956 output_operand_lossage ("floating constant misused");
957 break;
958
959 case PLUS:
960 /* Some assemblers need integer constants to appear last (eg masm). */
961 if (GET_CODE (XEXP (x, 0)) == CONST_INT)
962 {
963 addr_const_to_string (buf1, XEXP (x, 1));
964 strcat (str, buf1);
965 if (INTVAL (XEXP (x, 0)) >= 0)
966 strcat (str, "+");
967 addr_const_to_string (buf1, XEXP (x, 0));
968 strcat (str, buf1);
969 }
970 else
971 {
972 addr_const_to_string (buf1, XEXP (x, 0));
973 strcat (str, buf1);
bdb669cb 974 if (INTVAL (XEXP (x, 1)) >= 0)
a3f97cbb
JW		 975 strcat (str, "+");
976 addr_const_to_string (buf1, XEXP (x, 1));
bdb669cb 977 strcat (str, buf1);
a3f97cbb
JW		 978 }
979 break;
980
981 case MINUS:
982 /* Avoid outputting things like x-x or x+5-x, since some assemblers
983 can't handle that. */
984 x = simplify_subtraction (x);
985 if (GET_CODE (x) != MINUS)
986 goto restart;
987
988 addr_const_to_string (buf1, XEXP (x, 0));
989 strcat (str, buf1);
990 strcat (str, "-");
991 if (GET_CODE (XEXP (x, 1)) == CONST_INT
992 && INTVAL (XEXP (x, 1)) < 0)
993 {
994 strcat (str, ASM_OPEN_PAREN);
995 addr_const_to_string (buf1, XEXP (x, 1));
996 strcat (str, buf1);
997 strcat (str, ASM_CLOSE_PAREN);
998 }
999 else
1000 {
1001 addr_const_to_string (buf1, XEXP (x, 1));
1002 strcat (str, buf1);
1003 }
1004 break;
1005
1006 case ZERO_EXTEND:
1007 case SIGN_EXTEND:
1008 addr_const_to_string (buf1, XEXP (x, 0));
1009 strcat (str, buf1);
1010 break;
1011
1012 default:
1013 output_operand_lossage ("invalid expression as operand");
1014 }
1015}
1016
1017/* Convert an address constant to a string, and return a pointer to
1018 a copy of the result, located on the heap. */
1019static char *
1020addr_to_string (x)
1021 rtx x;
1022{
1023 char buf[1024];
1024 addr_const_to_string (buf, x);
1025 return xstrdup (buf);
1026}
1027
1028/* Test if rtl node points to a psuedo register. */
1029inline int
1030is_pseudo_reg (rtl)
1031 register rtx rtl;
1032{
1033 return (((GET_CODE (rtl) == REG) && (REGNO (rtl) >= FIRST_PSEUDO_REGISTER))
1034 || ((GET_CODE (rtl) == SUBREG)
1035 && (REGNO (XEXP (rtl, 0)) >= FIRST_PSEUDO_REGISTER)));
1036}
1037
1038
1039/* Return a reference to a type, with its const and volatile qualifiers
1040 removed. */
1041inline tree
1042type_main_variant (type)
1043 register tree type;
1044{
1045 type = TYPE_MAIN_VARIANT (type);
1046
1047 /* There really should be only one main variant among any group of variants
1048 of a given type (and all of the MAIN_VARIANT values for all members of
1049 the group should point to that one type) but sometimes the C front-end
1050 messes this up for array types, so we work around that bug here. */
1051 if (TREE_CODE (type) == ARRAY_TYPE)
1052 {
1053 while (type != TYPE_MAIN_VARIANT (type))
1054 type = TYPE_MAIN_VARIANT (type);
1055 }
1056 return type;
1057}
1058
1059/* Return non-zero if the given type node represents a tagged type. */
1060inline int
1061is_tagged_type (type)
1062 register tree type;
1063{
1064 register enum tree_code code = TREE_CODE (type);
1065
1066 return (code == RECORD_TYPE || code == UNION_TYPE
1067 || code == QUAL_UNION_TYPE || code == ENUMERAL_TYPE);
1068}
1069
1070/* Convert a DIE tag into its string name. */
1071static char *
1072dwarf_tag_name (tag)
1073 register unsigned tag;
1074{
1075 switch (tag)
1076 {
1077 case DW_TAG_padding:
1078 return "DW_TAG_padding";
1079 case DW_TAG_array_type:
1080 return "DW_TAG_array_type";
1081 case DW_TAG_class_type:
1082 return "DW_TAG_class_type";
1083 case DW_TAG_entry_point:
1084 return "DW_TAG_entry_point";
1085 case DW_TAG_enumeration_type:
1086 return "DW_TAG_enumeration_type";
1087 case DW_TAG_formal_parameter:
1088 return "DW_TAG_formal_parameter";
1089 case DW_TAG_imported_declaration:
1090 return "DW_TAG_imported_declaration";
1091 case DW_TAG_label:
1092 return "DW_TAG_label";
1093 case DW_TAG_lexical_block:
1094 return "DW_TAG_lexical_block";
1095 case DW_TAG_member:
1096 return "DW_TAG_member";
1097 case DW_TAG_pointer_type:
1098 return "DW_TAG_pointer_type";
1099 case DW_TAG_reference_type:
1100 return "DW_TAG_reference_type";
1101 case DW_TAG_compile_unit:
1102 return "DW_TAG_compile_unit";
1103 case DW_TAG_string_type:
1104 return "DW_TAG_string_type";
1105 case DW_TAG_structure_type:
1106 return "DW_TAG_structure_type";
1107 case DW_TAG_subroutine_type:
1108 return "DW_TAG_subroutine_type";
1109 case DW_TAG_typedef:
1110 return "DW_TAG_typedef";
1111 case DW_TAG_union_type:
1112 return "DW_TAG_union_type";
1113 case DW_TAG_unspecified_parameters:
1114 return "DW_TAG_unspecified_parameters";
1115 case DW_TAG_variant:
1116 return "DW_TAG_variant";
1117 case DW_TAG_common_block:
1118 return "DW_TAG_common_block";
1119 case DW_TAG_common_inclusion:
1120 return "DW_TAG_common_inclusion";
1121 case DW_TAG_inheritance:
1122 return "DW_TAG_inheritance";
1123 case DW_TAG_inlined_subroutine:
1124 return "DW_TAG_inlined_subroutine";
1125 case DW_TAG_module:
1126 return "DW_TAG_module";
1127 case DW_TAG_ptr_to_member_type:
1128 return "DW_TAG_ptr_to_member_type";
1129 case DW_TAG_set_type:
1130 return "DW_TAG_set_type";
1131 case DW_TAG_subrange_type:
1132 return "DW_TAG_subrange_type";
1133 case DW_TAG_with_stmt:
1134 return "DW_TAG_with_stmt";
1135 case DW_TAG_access_declaration:
1136 return "DW_TAG_access_declaration";
1137 case DW_TAG_base_type:
1138 return "DW_TAG_base_type";
1139 case DW_TAG_catch_block:
1140 return "DW_TAG_catch_block";
1141 case DW_TAG_const_type:
1142 return "DW_TAG_const_type";
1143 case DW_TAG_constant:
1144 return "DW_TAG_constant";
1145 case DW_TAG_enumerator:
1146 return "DW_TAG_enumerator";
1147 case DW_TAG_file_type:
1148 return "DW_TAG_file_type";
1149 case DW_TAG_friend:
1150 return "DW_TAG_friend";
1151 case DW_TAG_namelist:
1152 return "DW_TAG_namelist";
1153 case DW_TAG_namelist_item:
1154 return "DW_TAG_namelist_item";
1155 case DW_TAG_packed_type:
1156 return "DW_TAG_packed_type";
1157 case DW_TAG_subprogram:
1158 return "DW_TAG_subprogram";
1159 case DW_TAG_template_type_param:
1160 return "DW_TAG_template_type_param";
1161 case DW_TAG_template_value_param:
1162 return "DW_TAG_template_value_param";
1163 case DW_TAG_thrown_type:
1164 return "DW_TAG_thrown_type";
1165 case DW_TAG_try_block:
1166 return "DW_TAG_try_block";
1167 case DW_TAG_variant_part:
1168 return "DW_TAG_variant_part";
1169 case DW_TAG_variable:
1170 return "DW_TAG_variable";
1171 case DW_TAG_volatile_type:
1172 return "DW_TAG_volatile_type";
1173 case DW_TAG_MIPS_loop:
1174 return "DW_TAG_MIPS_loop";
1175 case DW_TAG_format_label:
1176 return "DW_TAG_format_label";
1177 case DW_TAG_function_template:
1178 return "DW_TAG_function_template";
1179 case DW_TAG_class_template:
1180 return "DW_TAG_class_template";
1181 default:
1182 return "DW_TAG_<unknown>";
1183 }
1184}
1185
1186/* Convert a DWARF attribute code into its string name. */
1187static char *
1188dwarf_attr_name (attr)
1189 register unsigned attr;
1190{
1191 switch (attr)
1192 {
1193 case DW_AT_sibling:
1194 return "DW_AT_sibling";
1195 case DW_AT_location:
1196 return "DW_AT_location";
1197 case DW_AT_name:
1198 return "DW_AT_name";
1199 case DW_AT_ordering:
1200 return "DW_AT_ordering";
1201 case DW_AT_subscr_data:
1202 return "DW_AT_subscr_data";
1203 case DW_AT_byte_size:
1204 return "DW_AT_byte_size";
1205 case DW_AT_bit_offset:
1206 return "DW_AT_bit_offset";
1207 case DW_AT_bit_size:
1208 return "DW_AT_bit_size";
1209 case DW_AT_element_list:
1210 return "DW_AT_element_list";
1211 case DW_AT_stmt_list:
1212 return "DW_AT_stmt_list";
1213 case DW_AT_low_pc:
1214 return "DW_AT_low_pc";
1215 case DW_AT_high_pc:
1216 return "DW_AT_high_pc";
1217 case DW_AT_language:
1218 return "DW_AT_language";
1219 case DW_AT_member:
1220 return "DW_AT_member";
1221 case DW_AT_discr:
1222 return "DW_AT_discr";
1223 case DW_AT_discr_value:
1224 return "DW_AT_discr_value";
1225 case DW_AT_visibility:
1226 return "DW_AT_visibility";
1227 case DW_AT_import:
1228 return "DW_AT_import";
1229 case DW_AT_string_length:
1230 return "DW_AT_string_length";
1231 case DW_AT_common_reference:
1232 return "DW_AT_common_reference";
1233 case DW_AT_comp_dir:
1234 return "DW_AT_comp_dir";
1235 case DW_AT_const_value:
1236 return "DW_AT_const_value";
1237 case DW_AT_containing_type:
1238 return "DW_AT_containing_type";
1239 case DW_AT_default_value:
1240 return "DW_AT_default_value";
1241 case DW_AT_inline:
1242 return "DW_AT_inline";
1243 case DW_AT_is_optional:
1244 return "DW_AT_is_optional";
1245 case DW_AT_lower_bound:
1246 return "DW_AT_lower_bound";
1247 case DW_AT_producer:
1248 return "DW_AT_producer";
1249 case DW_AT_prototyped:
1250 return "DW_AT_prototyped";
1251 case DW_AT_return_addr:
1252 return "DW_AT_return_addr";
1253 case DW_AT_start_scope:
1254 return "DW_AT_start_scope";
1255 case DW_AT_stride_size:
1256 return "DW_AT_stride_size";
1257 case DW_AT_upper_bound:
1258 return "DW_AT_upper_bound";
1259 case DW_AT_abstract_origin:
1260 return "DW_AT_abstract_origin";
1261 case DW_AT_accessibility:
1262 return "DW_AT_accessibility";
1263 case DW_AT_address_class:
1264 return "DW_AT_address_class";
1265 case DW_AT_artificial:
1266 return "DW_AT_artificial";
1267 case DW_AT_base_types:
1268 return "DW_AT_base_types";
1269 case DW_AT_calling_convention:
1270 return "DW_AT_calling_convention";
1271 case DW_AT_count:
1272 return "DW_AT_count";
1273 case DW_AT_data_member_location:
1274 return "DW_AT_data_member_location";
1275 case DW_AT_decl_column:
1276 return "DW_AT_decl_column";
1277 case DW_AT_decl_file:
1278 return "DW_AT_decl_file";
1279 case DW_AT_decl_line:
1280 return "DW_AT_decl_line";
1281 case DW_AT_declaration:
1282 return "DW_AT_declaration";
1283 case DW_AT_discr_list:
1284 return "DW_AT_discr_list";
1285 case DW_AT_encoding:
1286 return "DW_AT_encoding";
1287 case DW_AT_external:
1288 return "DW_AT_external";
1289 case DW_AT_frame_base:
1290 return "DW_AT_frame_base";
1291 case DW_AT_friend:
1292 return "DW_AT_friend";
1293 case DW_AT_identifier_case:
1294 return "DW_AT_identifier_case";
1295 case DW_AT_macro_info:
1296 return "DW_AT_macro_info";
1297 case DW_AT_namelist_items:
1298 return "DW_AT_namelist_items";
1299 case DW_AT_priority:
1300 return "DW_AT_priority";
1301 case DW_AT_segment:
1302 return "DW_AT_segment";
1303 case DW_AT_specification:
1304 return "DW_AT_specification";
1305 case DW_AT_static_link:
1306 return "DW_AT_static_link";
1307 case DW_AT_type:
1308 return "DW_AT_type";
1309 case DW_AT_use_location:
1310 return "DW_AT_use_location";
1311 case DW_AT_variable_parameter:
1312 return "DW_AT_variable_parameter";
1313 case DW_AT_virtuality:
1314 return "DW_AT_virtuality";
1315 case DW_AT_vtable_elem_location:
1316 return "DW_AT_vtable_elem_location";
1317
a3f97cbb
JW		 1318 case DW_AT_MIPS_fde:
1319 return "DW_AT_MIPS_fde";
1320 case DW_AT_MIPS_loop_begin:
1321 return "DW_AT_MIPS_loop_begin";
1322 case DW_AT_MIPS_tail_loop_begin:
1323 return "DW_AT_MIPS_tail_loop_begin";
1324 case DW_AT_MIPS_epilog_begin:
1325 return "DW_AT_MIPS_epilog_begin";
1326 case DW_AT_MIPS_loop_unroll_factor:
1327 return "DW_AT_MIPS_loop_unroll_factor";
1328 case DW_AT_MIPS_software_pipeline_depth:
1329 return "DW_AT_MIPS_software_pipeline_depth";
1330 case DW_AT_MIPS_linkage_name:
1331 return "DW_AT_MIPS_linkage_name";
7e23cb16
JM		 1332 case DW_AT_MIPS_stride:
1333 return "DW_AT_MIPS_stride";
1334 case DW_AT_MIPS_abstract_name:
1335 return "DW_AT_MIPS_abstract_name";
1336 case DW_AT_MIPS_clone_origin:
1337 return "DW_AT_MIPS_clone_origin";
1338 case DW_AT_MIPS_has_inlines:
1339 return "DW_AT_MIPS_has_inlines";
a3f97cbb
JW		 1340
1341 case DW_AT_sf_names:
1342 return "DW_AT_sf_names";
1343 case DW_AT_src_info:
1344 return "DW_AT_src_info";
1345 case DW_AT_mac_info:
1346 return "DW_AT_mac_info";
1347 case DW_AT_src_coords:
1348 return "DW_AT_src_coords";
1349 case DW_AT_body_begin:
1350 return "DW_AT_body_begin";
1351 case DW_AT_body_end:
1352 return "DW_AT_body_end";
1353 default:
1354 return "DW_AT_<unknown>";
1355 }
1356}
1357
1358/* Convert a DWARF value form code into its string name. */
1359static char *
1360dwarf_form_name (form)
1361 register unsigned form;
1362{
1363 switch (form)
1364 {
1365 case DW_FORM_addr:
1366 return "DW_FORM_addr";
1367 case DW_FORM_block2:
1368 return "DW_FORM_block2";
1369 case DW_FORM_block4:
1370 return "DW_FORM_block4";
1371 case DW_FORM_data2:
1372 return "DW_FORM_data2";
1373 case DW_FORM_data4:
1374 return "DW_FORM_data4";
1375 case DW_FORM_data8:
1376 return "DW_FORM_data8";
1377 case DW_FORM_string:
1378 return "DW_FORM_string";
1379 case DW_FORM_block:
1380 return "DW_FORM_block";
1381 case DW_FORM_block1:
1382 return "DW_FORM_block1";
1383 case DW_FORM_data1:
1384 return "DW_FORM_data1";
1385 case DW_FORM_flag:
1386 return "DW_FORM_flag";
1387 case DW_FORM_sdata:
1388 return "DW_FORM_sdata";
1389 case DW_FORM_strp:
1390 return "DW_FORM_strp";
1391 case DW_FORM_udata:
1392 return "DW_FORM_udata";
1393 case DW_FORM_ref_addr:
1394 return "DW_FORM_ref_addr";
1395 case DW_FORM_ref1:
1396 return "DW_FORM_ref1";
1397 case DW_FORM_ref2:
1398 return "DW_FORM_ref2";
1399 case DW_FORM_ref4:
1400 return "DW_FORM_ref4";
1401 case DW_FORM_ref8:
1402 return "DW_FORM_ref8";
1403 case DW_FORM_ref_udata:
1404 return "DW_FORM_ref_udata";
1405 case DW_FORM_indirect:
1406 return "DW_FORM_indirect";
1407 default:
1408 return "DW_FORM_<unknown>";
1409 }
1410}
1411
1412/* Convert a DWARF stack opcode into its string name. */
1413static char *
1414dwarf_stack_op_name (op)
1415 register unsigned op;
1416{
1417 switch (op)
1418 {
1419 case DW_OP_addr:
1420 return "DW_OP_addr";
1421 case DW_OP_deref:
1422 return "DW_OP_deref";
1423 case DW_OP_const1u:
1424 return "DW_OP_const1u";
1425 case DW_OP_const1s:
1426 return "DW_OP_const1s";
1427 case DW_OP_const2u:
1428 return "DW_OP_const2u";
1429 case DW_OP_const2s:
1430 return "DW_OP_const2s";
1431 case DW_OP_const4u:
1432 return "DW_OP_const4u";
1433 case DW_OP_const4s:
1434 return "DW_OP_const4s";
1435 case DW_OP_const8u:
1436 return "DW_OP_const8u";
1437 case DW_OP_const8s:
1438 return "DW_OP_const8s";
1439 case DW_OP_constu:
1440 return "DW_OP_constu";
1441 case DW_OP_consts:
1442 return "DW_OP_consts";
1443 case DW_OP_dup:
1444 return "DW_OP_dup";
1445 case DW_OP_drop:
1446 return "DW_OP_drop";
1447 case DW_OP_over:
1448 return "DW_OP_over";
1449 case DW_OP_pick:
1450 return "DW_OP_pick";
1451 case DW_OP_swap:
1452 return "DW_OP_swap";
1453 case DW_OP_rot:
1454 return "DW_OP_rot";
1455 case DW_OP_xderef:
1456 return "DW_OP_xderef";
1457 case DW_OP_abs:
1458 return "DW_OP_abs";
1459 case DW_OP_and:
1460 return "DW_OP_and";
1461 case DW_OP_div:
1462 return "DW_OP_div";
1463 case DW_OP_minus:
1464 return "DW_OP_minus";
1465 case DW_OP_mod:
1466 return "DW_OP_mod";
1467 case DW_OP_mul:
1468 return "DW_OP_mul";
1469 case DW_OP_neg:
1470 return "DW_OP_neg";
1471 case DW_OP_not:
1472 return "DW_OP_not";
1473 case DW_OP_or:
1474 return "DW_OP_or";
1475 case DW_OP_plus:
1476 return "DW_OP_plus";
1477 case DW_OP_plus_uconst:
1478 return "DW_OP_plus_uconst";
1479 case DW_OP_shl:
1480 return "DW_OP_shl";
1481 case DW_OP_shr:
1482 return "DW_OP_shr";
1483 case DW_OP_shra:
1484 return "DW_OP_shra";
1485 case DW_OP_xor:
1486 return "DW_OP_xor";
1487 case DW_OP_bra:
1488 return "DW_OP_bra";
1489 case DW_OP_eq:
1490 return "DW_OP_eq";
1491 case DW_OP_ge:
1492 return "DW_OP_ge";
1493 case DW_OP_gt:
1494 return "DW_OP_gt";
1495 case DW_OP_le:
1496 return "DW_OP_le";
1497 case DW_OP_lt:
1498 return "DW_OP_lt";
1499 case DW_OP_ne:
1500 return "DW_OP_ne";
1501 case DW_OP_skip:
1502 return "DW_OP_skip";
1503 case DW_OP_lit0:
1504 return "DW_OP_lit0";
1505 case DW_OP_lit1:
1506 return "DW_OP_lit1";
1507 case DW_OP_lit2:
1508 return "DW_OP_lit2";
1509 case DW_OP_lit3:
1510 return "DW_OP_lit3";
1511 case DW_OP_lit4:
1512 return "DW_OP_lit4";
1513 case DW_OP_lit5:
1514 return "DW_OP_lit5";
1515 case DW_OP_lit6:
1516 return "DW_OP_lit6";
1517 case DW_OP_lit7:
1518 return "DW_OP_lit7";
1519 case DW_OP_lit8:
1520 return "DW_OP_lit8";
1521 case DW_OP_lit9:
1522 return "DW_OP_lit9";
1523 case DW_OP_lit10:
1524 return "DW_OP_lit10";
1525 case DW_OP_lit11:
1526 return "DW_OP_lit11";
1527 case DW_OP_lit12:
1528 return "DW_OP_lit12";
1529 case DW_OP_lit13:
1530 return "DW_OP_lit13";
1531 case DW_OP_lit14:
1532 return "DW_OP_lit14";
1533 case DW_OP_lit15:
1534 return "DW_OP_lit15";
1535 case DW_OP_lit16:
1536 return "DW_OP_lit16";
1537 case DW_OP_lit17:
1538 return "DW_OP_lit17";
1539 case DW_OP_lit18:
1540 return "DW_OP_lit18";
1541 case DW_OP_lit19:
1542 return "DW_OP_lit19";
1543 case DW_OP_lit20:
1544 return "DW_OP_lit20";
1545 case DW_OP_lit21:
1546 return "DW_OP_lit21";
1547 case DW_OP_lit22:
1548 return "DW_OP_lit22";
1549 case DW_OP_lit23:
1550 return "DW_OP_lit23";
1551 case DW_OP_lit24:
1552 return "DW_OP_lit24";
1553 case DW_OP_lit25:
1554 return "DW_OP_lit25";
1555 case DW_OP_lit26:
1556 return "DW_OP_lit26";
1557 case DW_OP_lit27:
1558 return "DW_OP_lit27";
1559 case DW_OP_lit28:
1560 return "DW_OP_lit28";
1561 case DW_OP_lit29:
1562 return "DW_OP_lit29";
1563 case DW_OP_lit30:
1564 return "DW_OP_lit30";
1565 case DW_OP_lit31:
1566 return "DW_OP_lit31";
1567 case DW_OP_reg0:
1568 return "DW_OP_reg0";
1569 case DW_OP_reg1:
1570 return "DW_OP_reg1";
1571 case DW_OP_reg2:
1572 return "DW_OP_reg2";
1573 case DW_OP_reg3:
1574 return "DW_OP_reg3";
1575 case DW_OP_reg4:
1576 return "DW_OP_reg4";
1577 case DW_OP_reg5:
1578 return "DW_OP_reg5";
1579 case DW_OP_reg6:
1580 return "DW_OP_reg6";
1581 case DW_OP_reg7:
1582 return "DW_OP_reg7";
1583 case DW_OP_reg8:
1584 return "DW_OP_reg8";
1585 case DW_OP_reg9:
1586 return "DW_OP_reg9";
1587 case DW_OP_reg10:
1588 return "DW_OP_reg10";
1589 case DW_OP_reg11:
1590 return "DW_OP_reg11";
1591 case DW_OP_reg12:
1592 return "DW_OP_reg12";
1593 case DW_OP_reg13:
1594 return "DW_OP_reg13";
1595 case DW_OP_reg14:
1596 return "DW_OP_reg14";
1597 case DW_OP_reg15:
1598 return "DW_OP_reg15";
1599 case DW_OP_reg16:
1600 return "DW_OP_reg16";
1601 case DW_OP_reg17:
1602 return "DW_OP_reg17";
1603 case DW_OP_reg18:
1604 return "DW_OP_reg18";
1605 case DW_OP_reg19:
1606 return "DW_OP_reg19";
1607 case DW_OP_reg20:
1608 return "DW_OP_reg20";
1609 case DW_OP_reg21:
1610 return "DW_OP_reg21";
1611 case DW_OP_reg22:
1612 return "DW_OP_reg22";
1613 case DW_OP_reg23:
1614 return "DW_OP_reg23";
1615 case DW_OP_reg24:
1616 return "DW_OP_reg24";
1617 case DW_OP_reg25:
1618 return "DW_OP_reg25";
1619 case DW_OP_reg26:
1620 return "DW_OP_reg26";
1621 case DW_OP_reg27:
1622 return "DW_OP_reg27";
1623 case DW_OP_reg28:
1624 return "DW_OP_reg28";
1625 case DW_OP_reg29:
1626 return "DW_OP_reg29";
1627 case DW_OP_reg30:
1628 return "DW_OP_reg30";
1629 case DW_OP_reg31:
1630 return "DW_OP_reg31";
1631 case DW_OP_breg0:
1632 return "DW_OP_breg0";
1633 case DW_OP_breg1:
1634 return "DW_OP_breg1";
1635 case DW_OP_breg2:
1636 return "DW_OP_breg2";
1637 case DW_OP_breg3:
1638 return "DW_OP_breg3";
1639 case DW_OP_breg4:
1640 return "DW_OP_breg4";
1641 case DW_OP_breg5:
1642 return "DW_OP_breg5";
1643 case DW_OP_breg6:
1644 return "DW_OP_breg6";
1645 case DW_OP_breg7:
1646 return "DW_OP_breg7";
1647 case DW_OP_breg8:
1648 return "DW_OP_breg8";
1649 case DW_OP_breg9:
1650 return "DW_OP_breg9";
1651 case DW_OP_breg10:
1652 return "DW_OP_breg10";
1653 case DW_OP_breg11:
1654 return "DW_OP_breg11";
1655 case DW_OP_breg12:
1656 return "DW_OP_breg12";
1657 case DW_OP_breg13:
1658 return "DW_OP_breg13";
1659 case DW_OP_breg14:
1660 return "DW_OP_breg14";
1661 case DW_OP_breg15:
1662 return "DW_OP_breg15";
1663 case DW_OP_breg16:
1664 return "DW_OP_breg16";
1665 case DW_OP_breg17:
1666 return "DW_OP_breg17";
1667 case DW_OP_breg18:
1668 return "DW_OP_breg18";
1669 case DW_OP_breg19:
1670 return "DW_OP_breg19";
1671 case DW_OP_breg20:
1672 return "DW_OP_breg20";
1673 case DW_OP_breg21:
1674 return "DW_OP_breg21";
1675 case DW_OP_breg22:
1676 return "DW_OP_breg22";
1677 case DW_OP_breg23:
1678 return "DW_OP_breg23";
1679 case DW_OP_breg24:
1680 return "DW_OP_breg24";
1681 case DW_OP_breg25:
1682 return "DW_OP_breg25";
1683 case DW_OP_breg26:
1684 return "DW_OP_breg26";
1685 case DW_OP_breg27:
1686 return "DW_OP_breg27";
1687 case DW_OP_breg28:
1688 return "DW_OP_breg28";
1689 case DW_OP_breg29:
1690 return "DW_OP_breg29";
1691 case DW_OP_breg30:
1692 return "DW_OP_breg30";
1693 case DW_OP_breg31:
1694 return "DW_OP_breg31";
1695 case DW_OP_regx:
1696 return "DW_OP_regx";
1697 case DW_OP_fbreg:
1698 return "DW_OP_fbreg";
1699 case DW_OP_bregx:
1700 return "DW_OP_bregx";
1701 case DW_OP_piece:
1702 return "DW_OP_piece";
1703 case DW_OP_deref_size:
1704 return "DW_OP_deref_size";
1705 case DW_OP_xderef_size:
1706 return "DW_OP_xderef_size";
1707 case DW_OP_nop:
1708 return "DW_OP_nop";
1709 default:
1710 return "OP_<unknown>";
1711 }
1712}
1713
1714/* Convert a DWARF type code into its string name. */
1715static char *
1716dwarf_type_encoding_name (enc)
1717 register unsigned enc;
1718{
1719 switch (enc)
1720 {
1721 case DW_ATE_address:
1722 return "DW_ATE_address";
1723 case DW_ATE_boolean:
1724 return "DW_ATE_boolean";
1725 case DW_ATE_complex_float:
1726 return "DW_ATE_complex_float";
1727 case DW_ATE_float:
1728 return "DW_ATE_float";
1729 case DW_ATE_signed:
1730 return "DW_ATE_signed";
1731 case DW_ATE_signed_char:
1732 return "DW_ATE_signed_char";
1733 case DW_ATE_unsigned:
1734 return "DW_ATE_unsigned";
1735 case DW_ATE_unsigned_char:
1736 return "DW_ATE_unsigned_char";
1737 default:
1738 return "DW_ATE_<unknown>";
1739 }
1740}
1741
1742/* Convert a DWARF call frame info. operation to its string name */
1743static char *
1744dwarf_cfi_name (cfi_opc)
1745 register unsigned cfi_opc;
1746{
1747 switch (cfi_opc)
1748 {
1749 case DW_CFA_advance_loc:
1750 return "DW_CFA_advance_loc";
1751 case DW_CFA_offset:
1752 return "DW_CFA_offset";
1753 case DW_CFA_restore:
1754 return "DW_CFA_restore";
1755 case DW_CFA_nop:
1756 return "DW_CFA_nop";
1757 case DW_CFA_set_loc:
1758 return "DW_CFA_set_loc";
1759 case DW_CFA_advance_loc1:
1760 return "DW_CFA_advance_loc1";
1761 case DW_CFA_advance_loc2:
1762 return "DW_CFA_advance_loc2";
1763 case DW_CFA_advance_loc4:
1764 return "DW_CFA_advance_loc4";
1765 case DW_CFA_offset_extended:
1766 return "DW_CFA_offset_extended";
1767 case DW_CFA_restore_extended:
1768 return "DW_CFA_restore_extended";
1769 case DW_CFA_undefined:
1770 return "DW_CFA_undefined";
1771 case DW_CFA_same_value:
1772 return "DW_CFA_same_value";
1773 case DW_CFA_register:
1774 return "DW_CFA_register";
1775 case DW_CFA_remember_state:
1776 return "DW_CFA_remember_state";
1777 case DW_CFA_restore_state:
1778 return "DW_CFA_restore_state";
1779 case DW_CFA_def_cfa:
1780 return "DW_CFA_def_cfa";
1781 case DW_CFA_def_cfa_register:
1782 return "DW_CFA_def_cfa_register";
1783 case DW_CFA_def_cfa_offset:
1784 return "DW_CFA_def_cfa_offset";
1785 /* SGI/MIPS specific */
1786 case DW_CFA_MIPS_advance_loc8:
1787 return "DW_CFA_MIPS_advance_loc8";
1788 default:
1789 return "DW_CFA_<unknown>";
1790 }
1791}
1792\f
1793/* Determine the "ultimate origin" of a decl. The decl may be an inlined
1794 instance of an inlined instance of a decl which is local to an inline
1795 function, so we have to trace all of the way back through the origin chain
1796 to find out what sort of node actually served as the original seed for the
1797 given block. */
1798static tree
1799decl_ultimate_origin (decl)
1800 register tree decl;
1801{
1802 register tree immediate_origin = DECL_ABSTRACT_ORIGIN (decl);
1803
1804 if (immediate_origin == NULL)
1805 return NULL;
1806 else
1807 {
1808 register tree ret_val;
1809 register tree lookahead = immediate_origin;
1810
1811 do
1812 {
1813 ret_val = lookahead;
1814 lookahead = DECL_ABSTRACT_ORIGIN (ret_val);
1815 }
1816 while (lookahead != NULL && lookahead != ret_val);
1817 return ret_val;
1818 }
1819}
1820
1821/* Determine the "ultimate origin" of a block. The block may be an inlined
1822 instance of an inlined instance of a block which is local to an inline
1823 function, so we have to trace all of the way back through the origin chain
1824 to find out what sort of node actually served as the original seed for the
1825 given block. */
1826static tree
1827block_ultimate_origin (block)
1828 register tree block;
1829{
1830 register tree immediate_origin = BLOCK_ABSTRACT_ORIGIN (block);
1831
1832 if (immediate_origin == NULL)
1833 return NULL;
1834 else
1835 {
1836 register tree ret_val;
1837 register tree lookahead = immediate_origin;
1838
1839 do
1840 {
1841 ret_val = lookahead;
1842 lookahead = (TREE_CODE (ret_val) == BLOCK)
1843 ? BLOCK_ABSTRACT_ORIGIN (ret_val)
1844 : NULL;
1845 }
1846 while (lookahead != NULL && lookahead != ret_val);
1847 return ret_val;
1848 }
1849}
bdb669cb
JM		 1850
1851/* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT
1852 of a virtual function may refer to a base class, so we check the 'this'
1853 parameter. */
1854
a94dbf2c 1855static tree
bdb669cb
JM		 1856decl_class_context (decl)
1857 tree decl;
1858{
1859 tree context = NULL_TREE;
a94dbf2c 1860 if (TREE_CODE (decl) != FUNCTION_DECL || ! DECL_VINDEX (decl))
bdb669cb
JM		 1861 context = DECL_CONTEXT (decl);
1862 else
1863 context = TYPE_MAIN_VARIANT
1864 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl)))));
1865
1866 if (context && TREE_CODE_CLASS (TREE_CODE (context)) != 't')
1867 context = NULL_TREE;
1868
1869 return context;
1870}
a3f97cbb
JW		 1871\f
1872/**************** DIE internal representation constturction *******************/
1873
1874/* Add an attribute/value pair to a DIE */
1875inline void
1876add_dwarf_attr (die, attr)
1877 register dw_die_ref die;
1878 register dw_attr_ref attr;
1879{
1880 if (die != NULL && attr != NULL)
1881 {
1882 if (die->die_attr == NULL)
1883 {
1884 die->die_attr = attr;
1885 die->die_attr_last = attr;
1886 }
1887 else
1888 {
1889 die->die_attr_last->dw_attr_next = attr;
1890 die->die_attr_last = attr;
1891 }
1892 }
1893}
1894
1895/* Add a flag value attribute to a DIE. */
1896inline void
1897add_AT_flag (die, attr_kind, flag)
1898 register dw_die_ref die;
1899 register enum dwarf_attribute attr_kind;
1900 register unsigned flag;
1901{
1902 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
1903 if (attr != NULL)
1904 {
1905 attr->dw_attr_next = NULL;
1906 attr->dw_attr = attr_kind;
1907 attr->dw_attr_val.val_class = dw_val_class_flag;
1908 attr->dw_attr_val.v.val_flag = flag;
1909 add_dwarf_attr (die, attr);
1910 }
1911}
1912
1913/* Add a signed integer attribute value to a DIE. */
1914inline void
1915add_AT_int (die, attr_kind, int_val)
1916 register dw_die_ref die;
1917 register enum dwarf_attribute attr_kind;
1918 register long int int_val;
1919{
1920 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
1921 if (attr != NULL)
1922 {
1923 attr->dw_attr_next = NULL;
1924 attr->dw_attr = attr_kind;
1925 attr->dw_attr_val.val_class = dw_val_class_const;
1926 attr->dw_attr_val.v.val_int = int_val;
1927 add_dwarf_attr (die, attr);
1928 }
1929}
1930
1931/* Add an unsigned integer attribute value to a DIE. */
1932inline void
1933add_AT_unsigned (die, attr_kind, unsigned_val)
1934 register dw_die_ref die;
1935 register enum dwarf_attribute attr_kind;
1936 register unsigned long unsigned_val;
1937{
1938 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
1939 if (attr != NULL)
1940 {
1941 attr->dw_attr_next = NULL;
1942 attr->dw_attr = attr_kind;
1943 attr->dw_attr_val.val_class = dw_val_class_unsigned_const;
1944 attr->dw_attr_val.v.val_unsigned = unsigned_val;
1945 add_dwarf_attr (die, attr);
1946 }
1947}
1948
1949/* Add an unsigned double integer attribute value to a DIE. */
1950inline void
1951add_AT_double (die, attr_kind, val_hi, val_low)
1952 register dw_die_ref die;
1953 register enum dwarf_attribute attr_kind;
1954 register unsigned long val_hi;
1955 register unsigned long val_low;
1956{
1957 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
1958 if (attr != NULL)
1959 {
1960 attr->dw_attr_next = NULL;
1961 attr->dw_attr = attr_kind;
1962 attr->dw_attr_val.val_class = dw_val_class_double_const;
1963 attr->dw_attr_val.v.val_dbl_const.dw_dbl_hi = val_hi;
1964 attr->dw_attr_val.v.val_dbl_const.dw_dbl_low = val_low;
1965 add_dwarf_attr (die, attr);
1966 }
1967}
1968
1969/* Add a string attribute value to a DIE. */
1970inline void
1971add_AT_string (die, attr_kind, str)
1972 register dw_die_ref die;
1973 register enum dwarf_attribute attr_kind;
1974 register char *str;
1975{
1976 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
1977 if (attr != NULL)
1978 {
1979 attr->dw_attr_next = NULL;
1980 attr->dw_attr = attr_kind;
1981 attr->dw_attr_val.val_class = dw_val_class_str;
1982 attr->dw_attr_val.v.val_str = xstrdup (str);
1983 add_dwarf_attr (die, attr);
1984 }
1985}
1986
1987/* Add a DIE reference attribute value to a DIE. */
1988inline void
1989add_AT_die_ref (die, attr_kind, targ_die)
1990 register dw_die_ref die;
1991 register enum dwarf_attribute attr_kind;
1992 register dw_die_ref targ_die;
1993{
1994 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
1995 if (attr != NULL)
1996 {
1997 attr->dw_attr_next = NULL;
1998 attr->dw_attr = attr_kind;
1999 attr->dw_attr_val.val_class = dw_val_class_die_ref;
2000 attr->dw_attr_val.v.val_die_ref = targ_die;
2001 add_dwarf_attr (die, attr);
2002 }
2003}
2004
2005/* Add an FDE reference attribute value to a DIE. */
2006inline void
2007add_AT_fde_ref (die, attr_kind, targ_fde)
2008 register dw_die_ref die;
2009 register enum dwarf_attribute attr_kind;
2010 register unsigned targ_fde;
2011{
2012 register dw_attr_ref attr;
2013
2014 attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
2015 if (attr != NULL)
2016 {
2017 attr->dw_attr_next = NULL;
2018 attr->dw_attr = attr_kind;
2019 attr->dw_attr_val.val_class = dw_val_class_fde_ref;
2020 attr->dw_attr_val.v.val_fde_index = targ_fde;
2021 add_dwarf_attr (die, attr);
2022 }
2023}
2024
2025/* Add a location description attribute value to a DIE. */
2026inline void
2027add_AT_loc (die, attr_kind, loc)
2028 register dw_die_ref die;
2029 register enum dwarf_attribute attr_kind;
2030 register dw_loc_descr_ref loc;
2031{
2032 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
2033 if (attr != NULL)
2034 {
2035 attr->dw_attr_next = NULL;
2036 attr->dw_attr = attr_kind;
2037 attr->dw_attr_val.val_class = dw_val_class_loc;
2038 attr->dw_attr_val.v.val_loc = loc;
2039 add_dwarf_attr (die, attr);
2040 }
2041}
2042
2043/* Add an address constant attribute value to a DIE. */
2044inline void
2045add_AT_addr (die, attr_kind, addr)
2046 register dw_die_ref die;
2047 register enum dwarf_attribute attr_kind;
2048 char *addr;
2049{
2050 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
2051 if (attr != NULL)
2052 {
2053 attr->dw_attr_next = NULL;
2054 attr->dw_attr = attr_kind;
2055 attr->dw_attr_val.val_class = dw_val_class_addr;
2056 attr->dw_attr_val.v.val_addr = addr;
2057 add_dwarf_attr (die, attr);
2058 }
2059}
2060
2061/* Add a label identifier attribute value to a DIE. */
2062inline void
2063add_AT_lbl_id (die, attr_kind, lbl_id)
2064 register dw_die_ref die;
2065 register enum dwarf_attribute attr_kind;
2066 register char *lbl_id;
2067{
2068 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
2069 if (attr != NULL)
2070 {
2071 attr->dw_attr_next = NULL;
2072 attr->dw_attr = attr_kind;
2073 attr->dw_attr_val.val_class = dw_val_class_lbl_id;
2074 attr->dw_attr_val.v.val_lbl_id = xstrdup (lbl_id);
2075 add_dwarf_attr (die, attr);
2076 }
2077}
2078
2079/* Add a section offset attribute value to a DIE. */
2080inline void
2081add_AT_section_offset (die, attr_kind, section)
2082 register dw_die_ref die;
2083 register enum dwarf_attribute attr_kind;
2084 register char *section;
2085{
2086 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
2087 if (attr != NULL)
2088 {
2089 attr->dw_attr_next = NULL;
2090 attr->dw_attr = attr_kind;
2091 attr->dw_attr_val.val_class = dw_val_class_section_offset;
2092 attr->dw_attr_val.v.val_section = section;
2093 add_dwarf_attr (die, attr);
2094 }
2095}
2096
a3f97cbb
JW		 2097/* Test if die refers to an external subroutine. */
2098inline int
2099is_extern_subr_die (die)
2100 register dw_die_ref die;
2101{
2102 register dw_attr_ref a;
2103 register int is_subr = FALSE;
2104 register int is_extern = FALSE;
2105 if (die != NULL && die->die_tag == DW_TAG_subprogram)
2106 {
2107 is_subr = TRUE;
2108 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
2109 {
2110 if (a->dw_attr == DW_AT_external
2111 && a->dw_attr_val.val_class == dw_val_class_flag
2112 && a->dw_attr_val.v.val_flag != 0)
2113 {
2114 is_extern = TRUE;
2115 break;
2116 }
2117 }
2118 }
2119 return is_subr && is_extern;
2120}
2121
d291dd49
JM		 2122/* Get the attribute of type attr_kind. */
2123inline dw_attr_ref
2124get_AT (die, attr_kind)
a3f97cbb 2125 register dw_die_ref die;
d291dd49 2126 register enum dwarf_attribute attr_kind;
a3f97cbb
JW		 2127{
2128 register dw_attr_ref a;
7e23cb16 2129 register dw_die_ref spec = NULL;
d291dd49 2130
a3f97cbb
JW		 2131 if (die != NULL)
2132 {
2133 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
2134 {
d291dd49
JM		 2135 if (a->dw_attr == attr_kind)
2136 return a;
2137 if (a->dw_attr == DW_AT_specification
2138 || a->dw_attr == DW_AT_abstract_origin)
2139 spec = a->dw_attr_val.v.val_die_ref;
a3f97cbb 2140 }
d291dd49
JM		 2141 if (spec)
2142 return get_AT (spec, attr_kind);
a3f97cbb 2143 }
d291dd49
JM		 2144 return NULL;
2145}
2146
2147/* Return the "low pc" attribute value, typically associated with
2148 a subprogram DIE. Return null if the "low pc" attribute is
2149 either not prsent, or if it cannot be represented as an
2150 assembler label identifier. */
2151inline char *
2152get_AT_low_pc (die)
2153 register dw_die_ref die;
2154{
2155 register dw_attr_ref a = get_AT (die, DW_AT_low_pc);
2156 if (a && a->dw_attr_val.val_class == dw_val_class_lbl_id)
2157 return a->dw_attr_val.v.val_lbl_id;
2158 return NULL;
2159}
2160
2161/* Return the "high pc" attribute value, typically associated with
2162 a subprogram DIE. Return null if the "high pc" attribute is
2163 either not prsent, or if it cannot be represented as an
2164 assembler label identifier. */
2165inline char *
2166get_AT_hi_pc (die)
2167 register dw_die_ref die;
2168{
2169 register dw_attr_ref a = get_AT (die, DW_AT_high_pc);
2170 if (a && a->dw_attr_val.val_class == dw_val_class_lbl_id)
2171 return a->dw_attr_val.v.val_lbl_id;
2172 return NULL;
2173}
2174
2175/* Return the value of the string attribute designated by ATTR_KIND, or
2176 NULL if it is not present. */
2177inline char *
2178get_AT_string (die, attr_kind)
2179 register dw_die_ref die;
2180 register enum dwarf_attribute attr_kind;
2181{
2182 register dw_attr_ref a = get_AT (die, attr_kind);
2183 if (a && a->dw_attr_val.val_class == dw_val_class_str)
2184 return a->dw_attr_val.v.val_str;
2185 return NULL;
a3f97cbb
JW		 2186}
2187
bdb669cb
JM		 2188/* Return the value of the flag attribute designated by ATTR_KIND, or -1
2189 if it is not present. */
2190inline int
2191get_AT_flag (die, attr_kind)
2192 register dw_die_ref die;
2193 register enum dwarf_attribute attr_kind;
2194{
d291dd49
JM		 2195 register dw_attr_ref a = get_AT (die, attr_kind);
2196 if (a && a->dw_attr_val.val_class == dw_val_class_flag)
2197 return a->dw_attr_val.v.val_flag;
bdb669cb
JM		 2198 return -1;
2199}
2200
2201/* Return the value of the unsigned attribute designated by ATTR_KIND, or 0
2202 if it is not present. */
2203inline unsigned
2204get_AT_unsigned (die, attr_kind)
2205 register dw_die_ref die;
2206 register enum dwarf_attribute attr_kind;
2207{
d291dd49
JM		 2208 register dw_attr_ref a = get_AT (die, attr_kind);
2209 if (a && a->dw_attr_val.val_class == dw_val_class_unsigned_const)
2210 return a->dw_attr_val.v.val_unsigned;
bdb669cb
JM		 2211 return 0;
2212}
a3f97cbb 2213
a9d38797
JM		 2214inline int
2215is_c_family ()
2216{
2217 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
2218 return (lang == DW_LANG_C || lang == DW_LANG_C89
2219 || lang == DW_LANG_C_plus_plus);
2220}
2221
2222inline int
2223is_fortran ()
2224{
2225 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
2226 return (lang == DW_LANG_Fortran77 || lang == DW_LANG_Fortran90);
2227}
2228
4b674448
JM		 2229/* Remove the specified attribute if present. */
2230inline void
2231remove_AT (die, attr_kind)
2232 register dw_die_ref die;
2233 register enum dwarf_attribute attr_kind;
2234{
2235 register dw_attr_ref a;
2236 register dw_attr_ref removed = NULL;;
2237 if (die != NULL)
2238 {
2239 if (die->die_attr->dw_attr == attr_kind)
2240 {
2241 removed = die->die_attr;
2242 if (die->die_attr_last == die->die_attr)
2243 die->die_attr_last = NULL;
2244 die->die_attr = die->die_attr->dw_attr_next;
2245 }
2246 else for (a = die->die_attr; a->dw_attr_next != NULL;
2247 a = a->dw_attr_next)
2248 if (a->dw_attr_next->dw_attr == attr_kind)
2249 {
2250 removed = a->dw_attr_next;
2251 if (die->die_attr_last == a->dw_attr_next)
2252 die->die_attr_last = a;
2253 a->dw_attr_next = a->dw_attr_next->dw_attr_next;
e90b62db 2254 break;
4b674448
JM		 2255 }
2256 if (removed)
2257 free (removed);
2258 }
2259}
2260
2261/* Discard the children of this DIE. */
2262inline void
2263remove_children (die)
2264 register dw_die_ref die;
2265{
2266 register dw_die_ref child_die = die->die_child;
2267 die->die_child = NULL;
2268 die->die_child_last = NULL;
2269 while (child_die != NULL)
2270 {
2271 register dw_die_ref tmp_die = child_die;
2272 register dw_attr_ref a;
2273 child_die = child_die->die_sib;
2274
2275 for (a = tmp_die->die_attr; a != NULL; )
2276 {
2277 register dw_attr_ref tmp_a = a;
2278 a = a->dw_attr_next;
2279 free (tmp_a);
2280 }
2281 free (tmp_die);
2282 }
2283}
2284
a3f97cbb
JW		 2285/* Add a child DIE below its parent. */
2286inline void
2287add_child_die (die, child_die)
2288 register dw_die_ref die;
2289 register dw_die_ref child_die;
2290{
2291 if (die != NULL && child_die != NULL)
2292 {
2293 assert (die != child_die);
2294 child_die->die_parent = die;
2295 child_die->die_sib = NULL;
2296 if (die->die_child == NULL)
2297 {
2298 die->die_child = child_die;
2299 die->die_child_last = child_die;
2300 }
2301 else
2302 {
2303 die->die_child_last->die_sib = child_die;
2304 die->die_child_last = child_die;
2305 }
2306 }
2307}
2308
2309/* Return a pointer to a newly created DIE node. */
2310inline dw_die_ref
2311new_die (tag_value, parent_die)
2312 register enum dwarf_tag tag_value;
2313 register dw_die_ref parent_die;
2314{
2315 register dw_die_ref die = (dw_die_ref) xmalloc (sizeof (die_node));
2316 if (die != NULL)
2317 {
2318 die->die_tag = tag_value;
2319 die->die_abbrev = 0;
2320 die->die_offset = 0;
2321 die->die_child = NULL;
2322 die->die_parent = NULL;
2323 die->die_sib = NULL;
2324 die->die_child_last = NULL;
2325 die->die_attr = NULL;
2326 die->die_attr_last = NULL;
2327 if (parent_die != NULL)
a94dbf2c
JM		 2328 add_child_die (parent_die, die);
2329 else
2330 ++limbo_die_count;
a3f97cbb
JW		 2331 }
2332 return die;
2333}
2334
2335/* Return the DIE associated with the given type specifier. */
2336inline dw_die_ref
2337lookup_type_die (type)
2338 register tree type;
2339{
a94dbf2c 2340 return (dw_die_ref) TYPE_SYMTAB_POINTER (type);
a3f97cbb
JW		 2341}
2342
2343/* Equate a DIE to a given type specifier. */
2344static void
2345equate_type_number_to_die (type, type_die)
2346 register tree type;
2347 register dw_die_ref type_die;
2348{
a94dbf2c 2349 TYPE_SYMTAB_POINTER (type) = (char *) type_die;
a3f97cbb
JW		 2350}
2351
2352/* Return the DIE associated with a given declaration. */
2353inline dw_die_ref
2354lookup_decl_die (decl)
2355 register tree decl;
2356{
2357 register unsigned decl_id = DECL_UID (decl);
2358 return (decl_id < decl_die_table_in_use)
2359 ? decl_die_table[decl_id] : NULL;
2360}
2361
2362/* Equate a DIE to a particular declaration. */
2363static void
2364equate_decl_number_to_die (decl, decl_die)
2365 register tree decl;
2366 register dw_die_ref decl_die;
2367{
2368 register unsigned decl_id = DECL_UID (decl);
2369 register unsigned i;
2370 register unsigned num_allocated;
2371 if (decl_id >= decl_die_table_allocated)
2372 {
2373 num_allocated = (((decl_id + 1)
2374 + DECL_DIE_TABLE_INCREMENT - 1)
2375 / DECL_DIE_TABLE_INCREMENT)
2376 * DECL_DIE_TABLE_INCREMENT;
2377 decl_die_table = (dw_die_ref *) xrealloc (decl_die_table,
2378 sizeof (dw_die_ref) * num_allocated);
2379 bzero (&decl_die_table[decl_die_table_allocated],
2380 (num_allocated - decl_die_table_allocated) * sizeof (dw_die_ref));
2381 decl_die_table_allocated = num_allocated;
2382 }
2383 if (decl_id >= decl_die_table_in_use)
2384 {
2385 decl_die_table_in_use = (decl_id + 1);
2386 }
2387 decl_die_table[decl_id] = decl_die;
2388}
2389
2390/* Return a pointer to a newly allocated location description. Location
2391 descriptions are simple expression terms that can be strung
2392 together to form more complicated location (address) descriptions. */
2393inline dw_loc_descr_ref
2394new_loc_descr (op, oprnd1, oprnd2)
2395 register enum dwarf_location_atom op;
2396 register unsigned long oprnd1;
2397 register unsigned long oprnd2;
2398{
2399 register dw_loc_descr_ref descr =
2400 (dw_loc_descr_ref) xmalloc (sizeof (dw_loc_descr_node));
2401 if (descr != NULL)
2402 {
2403 descr->dw_loc_next = NULL;
2404 descr->dw_loc_opc = op;
2405 descr->dw_loc_oprnd1.val_class = dw_val_class_unsigned_const;
2406 descr->dw_loc_oprnd1.v.val_unsigned = oprnd1;
2407 descr->dw_loc_oprnd2.val_class = dw_val_class_unsigned_const;
2408 descr->dw_loc_oprnd2.v.val_unsigned = oprnd2;
2409 }
2410 return descr;
2411}
2412
2413/* Add a location description term to a location description expression. */
2414inline void
2415add_loc_descr (list_head, descr)
2416 register dw_loc_descr_ref *list_head;
2417 register dw_loc_descr_ref descr;
2418{
2419 register dw_loc_descr_ref *d;
2420 /* find the end of the chain. */
2421 for (d = list_head; (*d) != NULL; d = &(*d)->dw_loc_next)
2422 {
2423 /* nothing */ ;
2424 }
2425 *d = descr;
2426}
2427
2428/* Return a pointer to a newly allocated Call Frame Instruction. */
2429inline dw_cfi_ref
2430new_cfi ()
2431{
2432 register dw_cfi_ref cfi = (dw_cfi_ref) xmalloc (sizeof (dw_cfi_node));
2433 if (cfi != NULL)
2434 {
2435 cfi->dw_cfi_next = NULL;
2436 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = 0;
2437 cfi->dw_cfi_oprnd2.dw_cfi_reg_num = 0;
2438 }
2439 return cfi;
2440}
2441
2442/* Add a Call Frame Instruction to list of instructions. */
2443inline void
2444add_cfi (list_head, cfi)
2445 register dw_cfi_ref *list_head;
2446 register dw_cfi_ref cfi;
2447{
2448 register dw_cfi_ref *p;
2449 /* find the end of the chain. */
2450 for (p = list_head; (*p) != NULL; p = &(*p)->dw_cfi_next)
2451 {
2452 /* nothing */ ;
2453 }
2454 *p = cfi;
2455}
2456\f
2457/********* Print DWARF Internal Representation (debugging aids) ***************/
2458
2459/* Keep track of the number of spaces used to indent the
2460 output of the debugging routines that print the structure of
2461 the DIE internal representation. */
2462static int print_indent;
2463
2464/* Indent the line the number of spaces given by print_indent. */
2465inline void
2466print_spaces (outfile)
2467 FILE *outfile;
2468{
2469 fprintf (outfile, "%*s", print_indent, "");
2470}
2471
2472/* Print the information assoaciated with a given DIE, and its children.
2473 This routine is a debugging aid only. */
2474static void
2475print_die (die, outfile)
2476 dw_die_ref die;
2477 FILE *outfile;
2478{
2479 register dw_attr_ref a;
2480 register dw_die_ref c;
2481 print_spaces (outfile);
2482 fprintf (outfile, "DIE %4u: %s\n",
2483 die->die_offset, dwarf_tag_name (die->die_tag));
2484 print_spaces (outfile);
2485 fprintf (outfile, " abbrev id: %u", die->die_abbrev);
2486 fprintf (outfile, " offset: %u\n", die->die_offset);
2487 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
2488 {
2489 print_spaces (outfile);
2490 fprintf (outfile, " %s: ", dwarf_attr_name (a->dw_attr));
2491 switch (a->dw_attr_val.val_class)
2492 {
2493 case dw_val_class_addr:
2494 fprintf (outfile, "address");
2495 break;
2496 case dw_val_class_loc:
2497 fprintf (outfile, "location descriptor");
2498 break;
2499 case dw_val_class_const:
2500 fprintf (outfile, "%d", a->dw_attr_val.v.val_int);
2501 break;
2502 case dw_val_class_unsigned_const:
2503 fprintf (outfile, "%u", a->dw_attr_val.v.val_unsigned);
2504 break;
2505 case dw_val_class_double_const:
2506 fprintf (outfile, "constant (%u,%u)",
2507 a->dw_attr_val.v.val_dbl_const.dw_dbl_hi,
2508 a->dw_attr_val.v.val_dbl_const.dw_dbl_low);
2509 break;
2510 case dw_val_class_flag:
2511 fprintf (outfile, "%u", a->dw_attr_val.v.val_flag);
2512 break;
2513 case dw_val_class_die_ref:
2514 if (a->dw_attr_val.v.val_die_ref != NULL)
2515 {
2516 fprintf (outfile, "die -> %u",
2517 a->dw_attr_val.v.val_die_ref->die_offset);
2518 }
2519 else
2520 {
2521 fprintf (outfile, "die -> <null>");
2522 }
2523 break;
2524 case dw_val_class_lbl_id:
2525 fprintf (outfile, "label: %s", a->dw_attr_val.v.val_lbl_id);
2526 break;
2527 case dw_val_class_section_offset:
2528 fprintf (outfile, "section: %s", a->dw_attr_val.v.val_section);
2529 break;
2530 case dw_val_class_str:
2531 if (a->dw_attr_val.v.val_str != NULL)
2532 {
2533 fprintf (outfile, "\"%s\"", a->dw_attr_val.v.val_str);
2534 }
2535 else
2536 {
2537 fprintf (outfile, "<null>");
2538 }
2539 break;
2540 }
2541 fprintf (outfile, "\n");
2542 }
2543 if (die->die_child != NULL)
2544 {
2545 print_indent += 4;
2546 for (c = die->die_child; c != NULL; c = c->die_sib)
2547 {
2548 print_die (c, outfile);
2549 }
2550 print_indent -= 4;
2551 }
2552}
2553
2554/* Print the contents of the source code line number correspondence table.
2555 This routine is a debugging aid only. */
2556static void
2557print_dwarf_line_table (outfile)
2558 FILE *outfile;
2559{
2560 register unsigned i;
2561 register dw_line_info_ref line_info;
2562 fprintf (outfile, "\n\nDWARF source line information\n");
2563 for (i = 1; i < line_info_table_in_use; ++i)
2564 {
2565 line_info = &line_info_table[i];
2566 fprintf (outfile, "%5d: ", i);
2567 fprintf (outfile, "%-20s", file_table[line_info->dw_file_num]);
2568 fprintf (outfile, "%6d", line_info->dw_line_num);
2569 fprintf (outfile, "\n");
2570 }
2571 fprintf (outfile, "\n\n");
2572}
2573
2574/* Print the information collected for a given DIE. */
2575void
2576debug_dwarf_die (die)
2577 dw_die_ref die;
2578{
2579 print_die (die, stderr);
2580}
2581
2582/* Print all DWARF informaiton collected for the compilation unit.
2583 This routine is a debugging aid only. */
2584void
2585debug_dwarf ()
2586{
2587 print_indent = 0;
2588 print_die (comp_unit_die, stderr);
2589 print_dwarf_line_table (stderr);
2590}
2591
2592\f
2593/***************** DWARF Information Construction Support *********************/
2594
2595/* Traverse the DIE, and add a sibling attribute if it may have the
2596 effect of speeding up access to siblings. To save some space,
2597 avoid generating sibling attributes for DIE's without children. */
2598static void
2599add_sibling_attributes(die)
2600 register dw_die_ref die;
2601{
2602 register dw_die_ref c;
2603 register dw_attr_ref attr;
2604 if (die != comp_unit_die && die->die_child != NULL)
2605 {
2606 attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
2607 if (attr != NULL)
2608 {
2609 attr->dw_attr_next = NULL;
2610 attr->dw_attr = DW_AT_sibling;
2611 attr->dw_attr_val.val_class = dw_val_class_die_ref;
2612 attr->dw_attr_val.v.val_die_ref = die->die_sib;
2613 }
2614 /* add the sibling link to the front of the attribute list. */
2615 attr->dw_attr_next = die->die_attr;
2616 if (die->die_attr == NULL)
2617 {
2618 die->die_attr_last = attr;
2619 }
2620 die->die_attr = attr;
2621 }
2622 for (c = die->die_child; c != NULL; c = c->die_sib)
2623 {
2624 add_sibling_attributes (c);
2625 }
2626}
2627
2628/* The format of each DIE (and its attribute value pairs)
2629 is encoded in an abbreviation table. This routine builds the
2630 abbreviation table and assigns a unique abbreviation id for
2631 each abbreviation entry. The children of each die are visited
2632 recursively. */
2633static void
2634build_abbrev_table (die)
2635 register dw_die_ref die;
2636{
2637 register unsigned long abbrev_id;
2638 register unsigned long n_alloc;
2639 register dw_die_ref c;
2640 register dw_attr_ref d_attr, a_attr;
2641 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
2642 {
2643 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
2644 if (abbrev->die_tag == die->die_tag)
2645 {
2646 if ((abbrev->die_child != NULL) == (die->die_child != NULL))
2647 {
2648 a_attr = abbrev->die_attr;
2649 d_attr = die->die_attr;
2650 while (a_attr != NULL && d_attr != NULL)
2651 {
2652 if ((a_attr->dw_attr != d_attr->dw_attr)
f37230f0
JM		 2653 || (value_format (&a_attr->dw_attr_val)
2654 != value_format (&d_attr->dw_attr_val)))
a3f97cbb
JW		 2655 {
2656 break;
2657 }
2658 a_attr = a_attr->dw_attr_next;
2659 d_attr = d_attr->dw_attr_next;
2660 }
2661 if (a_attr == NULL && d_attr == NULL)
2662 {
2663 break;
2664 }
2665 }
2666 }
2667 }
2668 if (abbrev_id >= abbrev_die_table_in_use)
2669 {
2670 if (abbrev_die_table_in_use >= abbrev_die_table_allocated)
2671 {
2672 n_alloc = abbrev_die_table_allocated + ABBREV_DIE_TABLE_INCREMENT;
2673 abbrev_die_table = (dw_die_ref *)
2674 xmalloc (abbrev_die_table,
2675 sizeof (dw_die_ref) * n_alloc);
2676 bzero (&abbrev_die_table[abbrev_die_table_allocated],
2677 (n_alloc - abbrev_die_table_allocated) * sizeof (dw_die_ref));
2678 abbrev_die_table_allocated = n_alloc;
2679 }
2680 ++abbrev_die_table_in_use;
2681 abbrev_die_table[abbrev_id] = die;
2682 }
2683 die->die_abbrev = abbrev_id;
2684 for (c = die->die_child; c != NULL; c = c->die_sib)
2685 {
2686 build_abbrev_table (c);
2687 }
2688}
2689
2690\f
2691/********************** DWARF Information Sizing *****************************/
2692
2693/* Return the size of an unsigned LEB128 quantity. */
2694inline unsigned long
2695size_of_uleb128 (value)
2696 register unsigned long value;
2697{
2698 register unsigned long size = 0;
2699 register unsigned byte;
2700 do
2701 {
2702 byte = (value & 0x7f);
2703 value >>= 7;
2704 size += 1;
2705 }
2706 while (value != 0);
2707 return size;
2708}
2709
2710/* Return the size of a signed LEB128 quantity. */
2711inline unsigned long
2712size_of_sleb128 (value)
2713 register long value;
2714{
2715 register unsigned long size = 0;
2716 register unsigned byte;
2717 do
2718 {
2719 byte = (value & 0x7f);
2720 value >>= 7;
2721 size += 1;
2722 }
2723 while (!(((value == 0) && ((byte & 0x40) == 0))
2724 || ((value == -1) && ((byte & 0x40) != 0))));
2725 return size;
2726}
2727
2728/* Return the size of a string, including the null byte. */
2729static unsigned long
2730size_of_string (str)
2731 register char *str;
2732{
2733 register unsigned long size = 0;
2734 register unsigned long slen = strlen (str);
2735 register unsigned long i;
2736 register unsigned c;
2737 for (i = 0; i < slen; ++i)
2738 {
2739 c = str[i];
2740 if (c == '\\')
2741 {
2742 ++i;
2743 }
2744 size += 1;
2745 }
2746 /* Null terminator. */
2747 size += 1;
2748 return size;
2749}
2750
2751/* Return the size of a location descriptor. */
2752static unsigned long
2753size_of_loc_descr (loc)
2754 register dw_loc_descr_ref loc;
2755{
2756 register unsigned long size = 1;
2757 switch (loc->dw_loc_opc)
2758 {
2759 case DW_OP_addr:
2760 size += PTR_SIZE;
2761 break;
2762 case DW_OP_const1u:
2763 case DW_OP_const1s:
2764 size += 1;
2765 break;
2766 case DW_OP_const2u:
2767 case DW_OP_const2s:
2768 size += 2;
2769 break;
2770 case DW_OP_const4u:
2771 case DW_OP_const4s:
2772 size += 4;
2773 break;
2774 case DW_OP_const8u:
2775 case DW_OP_const8s:
2776 size += 8;
2777 break;
2778 case DW_OP_constu:
2779 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2780 break;
2781 case DW_OP_consts:
2782 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
2783 break;
2784 case DW_OP_pick:
2785 size += 1;
2786 break;
2787 case DW_OP_plus_uconst:
2788 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2789 break;
2790 case DW_OP_skip:
2791 case DW_OP_bra:
2792 size += 2;
2793 break;
2794 case DW_OP_breg0:
2795 case DW_OP_breg1:
2796 case DW_OP_breg2:
2797 case DW_OP_breg3:
2798 case DW_OP_breg4:
2799 case DW_OP_breg5:
2800 case DW_OP_breg6:
2801 case DW_OP_breg7:
2802 case DW_OP_breg8:
2803 case DW_OP_breg9:
2804 case DW_OP_breg10:
2805 case DW_OP_breg11:
2806 case DW_OP_breg12:
2807 case DW_OP_breg13:
2808 case DW_OP_breg14:
2809 case DW_OP_breg15:
2810 case DW_OP_breg16:
2811 case DW_OP_breg17:
2812 case DW_OP_breg18:
2813 case DW_OP_breg19:
2814 case DW_OP_breg20:
2815 case DW_OP_breg21:
2816 case DW_OP_breg22:
2817 case DW_OP_breg23:
2818 case DW_OP_breg24:
2819 case DW_OP_breg25:
2820 case DW_OP_breg26:
2821 case DW_OP_breg27:
2822 case DW_OP_breg28:
2823 case DW_OP_breg29:
2824 case DW_OP_breg30:
2825 case DW_OP_breg31:
2826 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
2827 break;
2828 case DW_OP_regx:
2829 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2830 break;
2831 case DW_OP_fbreg:
2832 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
2833 break;
2834 case DW_OP_bregx:
2835 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2836 size += size_of_sleb128 (loc->dw_loc_oprnd2.v.val_int);
2837 break;
2838 case DW_OP_piece:
2839 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2840 break;
2841 case DW_OP_deref_size:
2842 case DW_OP_xderef_size:
2843 size += 1;
2844 break;
2845 default:
2846 break;
2847 }
2848 return size;
2849}
2850
f37230f0
JM		 2851/* Return the size of a series of location descriptors. */
2852static unsigned long
2853size_of_locs (loc)
2854 register dw_loc_descr_ref loc;
2855{
2856 register unsigned long size = 0;
2857 for (; loc != NULL; loc = loc->dw_loc_next)
2858 size += size_of_loc_descr (loc);
2859 return size;
2860}
2861
7e23cb16
JM		 2862/* Return the power-of-two number of bytes necessary to represent VALUE. */
2863static int
2864constant_size (value)
2865 long unsigned value;
2866{
2867 int log;
2868
2869 if (value == 0)
2870 log = 0;
2871 else
2872 log = floor_log2 (value);
2873
2874 log = log / 8;
2875 log = 1 << (floor_log2 (log) + 1);
2876
2877 return log;
2878}
2879
a3f97cbb
JW		 2880/* Return the size of a DIE, as it is represented in the
2881 .debug_info section. */
2882static unsigned long
2883size_of_die (die)
2884 register dw_die_ref die;
2885{
2886 register unsigned long size = 0;
2887 register dw_attr_ref a;
a3f97cbb
JW		 2888 size += size_of_uleb128 (die->die_abbrev);
2889 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
2890 {
2891 switch (a->dw_attr_val.val_class)
2892 {
2893 case dw_val_class_addr:
7e23cb16 2894 size += PTR_SIZE;
a3f97cbb
JW		 2895 break;
2896 case dw_val_class_loc:
f37230f0
JM		 2897 {
2898 register unsigned long lsize
2899 = size_of_locs (a->dw_attr_val.v.val_loc);
2900
2901 /* Block length. */
2902 size += constant_size (lsize);
2903 size += lsize;
2904 }
a3f97cbb
JW		 2905 break;
2906 case dw_val_class_const:
2907 size += 4;
2908 break;
2909 case dw_val_class_unsigned_const:
7e23cb16 2910 size += constant_size (a->dw_attr_val.v.val_unsigned);
a3f97cbb
JW		 2911 break;
2912 case dw_val_class_double_const:
2913 size += 8;
2914 break;
2915 case dw_val_class_flag:
2916 size += 1;
2917 break;
2918 case dw_val_class_die_ref:
7e23cb16 2919 size += DWARF_OFFSET_SIZE;
a3f97cbb
JW		 2920 break;
2921 case dw_val_class_fde_ref:
7e23cb16 2922 size += DWARF_OFFSET_SIZE;
a3f97cbb
JW		 2923 break;
2924 case dw_val_class_lbl_id:
7e23cb16 2925 size += PTR_SIZE;
a3f97cbb
JW		 2926 break;
2927 case dw_val_class_section_offset:
7e23cb16 2928 size += DWARF_OFFSET_SIZE;
a3f97cbb
JW		 2929 break;
2930 case dw_val_class_str:
2931 size += size_of_string (a->dw_attr_val.v.val_str);
2932 break;
2933 default:
2934 abort ();
2935 }
2936 }
2937 return size;
2938}
2939
2940/* Size the debgging information associted with a given DIE.
2941 Visits the DIE's children recursively. Updates the global
2942 variable next_die_offset, on each time through. Uses the
2943 current value of next_die_offset to updete the die_offset
2944 field in each DIE. */
2945static void
2946calc_die_sizes (die)
2947 dw_die_ref die;
2948{
2949 register dw_die_ref c;
a3f97cbb
JW		 2950 die->die_offset = next_die_offset;
2951 next_die_offset += size_of_die (die);
2952 for (c = die->die_child; c != NULL; c = c->die_sib)
2953 {
2954 calc_die_sizes (c);
2955 }
2956 if (die->die_child != NULL)
2957 {
2958 /* Count the null byte used to terminate sibling lists. */
2959 next_die_offset += 1;
2960 }
2961}
2962
2963/* Return the size of the line information prolog generated for the
2964 compilation unit. */
2965static unsigned long
2966size_of_line_prolog ()
2967{
2968 register unsigned long size;
a3f97cbb
JW		 2969 register unsigned long ft_index;
2970 size = DWARF_LINE_PROLOG_HEADER_SIZE;
2971 /* Count the size of the table giving number of args for each
2972 standard opcode. */
2973 size += DWARF_LINE_OPCODE_BASE - 1;
2974 /* Include directory table is empty (at present). Count only the
2975 the null byte used to terminate the table. */
2976 size += 1;
2977 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
2978 {
2979 /* File name entry. */
2980 size += size_of_string (file_table[ft_index]);
2981 /* Include directory index. */
2982 size += size_of_uleb128 (0);
2983 /* Modification time. */
2984 size += size_of_uleb128 (0);
2985 /* File length in bytes. */
2986 size += size_of_uleb128 (0);
2987 }
2988 /* Count the file table terminator. */
2989 size += 1;
2990 return size;
2991}
2992
2993/* Return the size of the line information generated for this
2994 compilation unit. */
2995static unsigned long
2996size_of_line_info ()
2997{
2998 register unsigned long size;
a3f97cbb
JW		 2999 register unsigned long lt_index;
3000 register unsigned long current_line;
3001 register long line_offset;
3002 register long line_delta;
3003 register unsigned long current_file;
e90b62db 3004 register unsigned long function;
a3f97cbb
JW		 3005 /* Version number. */
3006 size = 2;
3007 /* Prolog length specifier. */
7e23cb16 3008 size += DWARF_OFFSET_SIZE;
a3f97cbb
JW		 3009 /* Prolog. */
3010 size += size_of_line_prolog ();
3011 /* Set address register instruction. */
3012 size += 1 + size_of_uleb128 (1 + PTR_SIZE)
3013 + 1 + PTR_SIZE;
3014 current_file = 1;
3015 current_line = 1;
3016 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
3017 {
e90b62db 3018 register dw_line_info_ref line_info;
a3f97cbb
JW		 3019 /* Advance pc instruction. */
3020 size += 1 + 2;
3021 line_info = &line_info_table[lt_index];
3022 if (line_info->dw_file_num != current_file)
3023 {
3024 /* Set file number instruction. */
3025 size += 1;
3026 current_file = line_info->dw_file_num;
3027 size += size_of_uleb128 (current_file);
3028 }
3029 if (line_info->dw_line_num != current_line)
3030 {
3031 line_offset = line_info->dw_line_num - current_line;
3032 line_delta = line_offset - DWARF_LINE_BASE;
3033 current_line = line_info->dw_line_num;
3034 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
3035 {
3036 /* 1-byte special line number instruction. */
3037 size += 1;
3038 }
3039 else
3040 {
3041 /* Advance line instruction. */
3042 size += 1;
3043 size += size_of_sleb128 (line_offset);
3044 /* Generate line entry instruction. */
3045 size += 1;
3046 }
3047 }
3048 }
bdb669cb
JM		 3049 /* Advance pc instruction. */
3050 size += 1 + 2;
a3f97cbb
JW		 3051 /* End of line number info. marker. */
3052 size += 1 + size_of_uleb128 (1) + 1;
e90b62db
JM		 3053 function = 0;
3054 current_file = 1;
3055 current_line = 1;
3056 for (lt_index = 0; lt_index < separate_line_info_table_in_use; )
3057 {
3058 register dw_separate_line_info_ref line_info
3059 = &separate_line_info_table[lt_index];
3060 if (function != line_info->function)
3061 {
3062 function = line_info->function;
3063 /* Set address register instruction. */
3064 size += 1 + size_of_uleb128 (1 + PTR_SIZE)
3065 + 1 + PTR_SIZE;
3066 }
3067 else
3068 {
3069 /* Advance pc instruction. */
3070 size += 1 + 2;
3071 }
3072 if (line_info->dw_file_num != current_file)
3073 {
3074 /* Set file number instruction. */
3075 size += 1;
3076 current_file = line_info->dw_file_num;
3077 size += size_of_uleb128 (current_file);
3078 }
3079 if (line_info->dw_line_num != current_line)
3080 {
3081 line_offset = line_info->dw_line_num - current_line;
3082 line_delta = line_offset - DWARF_LINE_BASE;
3083 current_line = line_info->dw_line_num;
3084 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
3085 {
3086 /* 1-byte special line number instruction. */
3087 size += 1;
3088 }
3089 else
3090 {
3091 /* Advance line instruction. */
3092 size += 1;
3093 size += size_of_sleb128 (line_offset);
3094 /* Generate line entry instruction. */
3095 size += 1;
3096 }
3097 }
3098 ++lt_index;
3099
3100 /* If we're done with a function, end its sequence. */
3101 if (lt_index == separate_line_info_table_in_use
3102 || separate_line_info_table[lt_index].function != function)
3103 {
3104 current_file = 1;
3105 current_line = 1;
3106 /* Advance pc instruction. */
3107 size += 1 + 2;
3108 /* End of line number info. marker. */
3109 size += 1 + size_of_uleb128 (1) + 1;
3110 }
3111 }
a3f97cbb
JW		 3112 return size;
3113}
3114
3115/* Return the size of the .debug_pubnames table generated for the
3116 compilation unit. */
3117static unsigned long
3118size_of_pubnames ()
3119{
a3f97cbb 3120 register unsigned long size;
d291dd49
JM		 3121 register unsigned i;
3122
a3f97cbb 3123 size = DWARF_PUBNAMES_HEADER_SIZE;
d291dd49 3124 for (i = 0; i < pubname_table_in_use; ++i)
a3f97cbb 3125 {
d291dd49 3126 register pubname_ref p = &pubname_table[i];
7e23cb16 3127 size += DWARF_OFFSET_SIZE + size_of_string (p->name);
a3f97cbb 3128 }
7e23cb16 3129 size += DWARF_OFFSET_SIZE;
a3f97cbb
JW		 3130 return size;
3131}
3132
3133/* Return the size of the information in the .debug_aranges seciton. */
3134static unsigned long
3135size_of_aranges ()
3136{
3137 register unsigned long size;
3138 size = DWARF_ARANGES_HEADER_SIZE;
3139 /* Count the address/length pair for this compilation unit. */
7e23cb16
JM		 3140 size += 2 * PTR_SIZE;
3141 size += 2 * PTR_SIZE * arange_table_in_use;
a3f97cbb 3142 /* Count the two zero words used to terminated the address range table. */
7e23cb16 3143 size += 2 * PTR_SIZE;
a3f97cbb
JW		 3144 return size;
3145}
3146\f
3147/**************** DWARF Debug Information Output *****************************/
3148
3149/* Output an unsigned LEB128 quantity. */
3150static void
3151output_uleb128 (value)
3152 register unsigned long value;
3153{
b2932ae5 3154 unsigned long save_value = value;
a3f97cbb
JW		 3155 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
3156 do
3157 {
3158 register unsigned byte = (value & 0x7f);
3159 value >>= 7;
3160 if (value != 0)
3161 {
3162 /* More bytes to follow. */
3163 byte |= 0x80;
3164 }
3165 fprintf (asm_out_file, "0x%x", byte);
3166 if (value != 0)
3167 {
3168 fprintf (asm_out_file, ",");
3169 }
3170 }
3171 while (value != 0);
b2932ae5
JM		 3172 if (flag_verbose_asm)
3173 fprintf (asm_out_file, "\t%s ULEB128 0x%x", ASM_COMMENT_START, save_value);
a3f97cbb
JW		 3174}
3175
3176/* Output an signed LEB128 quantity. */
3177static void
3178output_sleb128 (value)
3179 register long value;
3180{
3181 register int more;
3182 register unsigned byte;
b2932ae5 3183 long save_value = value;
a3f97cbb
JW		 3184 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
3185 do
3186 {
3187 byte = (value & 0x7f);
3188 /* arithmetic shift */
3189 value >>= 7;
3190 more = !((((value == 0) && ((byte & 0x40) == 0))
3191 || ((value == -1) && ((byte & 0x40) != 0))));
3192 if (more)
3193 {
3194 byte |= 0x80;
3195 }
3196 fprintf (asm_out_file, "0x%x", byte);
3197 if (more)
3198 {
3199 fprintf (asm_out_file, ",");
3200 }
3201 }
3202 while (more);
b2932ae5
JM		 3203 if (flag_verbose_asm)
3204 fprintf (asm_out_file, "\t%s SLEB128 %d", ASM_COMMENT_START, save_value);
a3f97cbb
JW		 3205}
3206
f37230f0
JM		 3207/* Select the encoding of an attribute value. */
3208static enum dwarf_form
3209value_format (v)
a3f97cbb
JW		 3210 dw_val_ref v;
3211{
a3f97cbb
JW		 3212 switch (v->val_class)
3213 {
3214 case dw_val_class_addr:
f37230f0 3215 return DW_FORM_addr;
a3f97cbb 3216 case dw_val_class_loc:
f37230f0
JM		 3217 switch (constant_size (size_of_locs (v->v.val_loc)))
3218 {
3219 case 1:
3220 return DW_FORM_block1;
3221 case 2:
3222 return DW_FORM_block2;
3223 default:
3224 abort ();
3225 }
a3f97cbb 3226 case dw_val_class_const:
f37230f0 3227 return DW_FORM_data4;
a3f97cbb 3228 case dw_val_class_unsigned_const:
7e23cb16
JM		 3229 switch (constant_size (v->v.val_unsigned))
3230 {
3231 case 1:
f37230f0 3232 return DW_FORM_data1;
7e23cb16 3233 case 2:
f37230f0 3234 return DW_FORM_data2;
7e23cb16 3235 case 4:
f37230f0 3236 return DW_FORM_data4;
7e23cb16
JM		 3237 default:
3238 abort ();
3239 }
a3f97cbb 3240 case dw_val_class_double_const:
f37230f0 3241 return DW_FORM_data8;
a3f97cbb 3242 case dw_val_class_flag:
f37230f0 3243 return DW_FORM_flag;
a3f97cbb 3244 case dw_val_class_die_ref:
f37230f0 3245 return DW_FORM_ref;
a3f97cbb 3246 case dw_val_class_fde_ref:
f37230f0 3247 return DW_FORM_data;
a3f97cbb 3248 case dw_val_class_lbl_id:
f37230f0 3249 return DW_FORM_addr;
a3f97cbb 3250 case dw_val_class_section_offset:
f37230f0 3251 return DW_FORM_data;
a3f97cbb 3252 case dw_val_class_str:
f37230f0 3253 return DW_FORM_string;
a3f97cbb
JW		 3254 default:
3255 abort ();
3256 }
f37230f0
JM		 3257}
3258
3259/* Output the encoding of an attribute value. */
3260static void
3261output_value_format (v)
3262 dw_val_ref v;
3263{
3264 enum dwarf_form form = value_format (v);
a3f97cbb
JW		 3265 output_uleb128 (form);
3266 if (flag_verbose_asm)
b2932ae5 3267 fprintf (asm_out_file, " (%s)", dwarf_form_name (form));
a3f97cbb
JW		 3268 fputc ('\n', asm_out_file);
3269}
3270
3271/* Output the .debug_abbrev section which defines the DIE abbreviation
3272 table. */
3273static void
3274output_abbrev_section ()
3275{
3276 unsigned long abbrev_id;
3277 dw_attr_ref a_attr;
3278 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
3279 {
3280 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
3281 output_uleb128 (abbrev_id);
3282 if (flag_verbose_asm)
b2932ae5 3283 fprintf (asm_out_file, " (abbrev code)");
a3f97cbb
JW		 3284 fputc ('\n', asm_out_file);
3285 output_uleb128 (abbrev->die_tag);
3286 if (flag_verbose_asm)
b2932ae5
JM		 3287 fprintf (asm_out_file, " (TAG: %s)",
3288 dwarf_tag_name (abbrev->die_tag));
a3f97cbb
JW		 3289 fputc ('\n', asm_out_file);
3290 fprintf (asm_out_file, "\t%s\t0x%x", ASM_BYTE_OP,
3291 (abbrev->die_child != NULL)
3292 ? DW_children_yes : DW_children_no);
3293 if (flag_verbose_asm)
3294 {
3295 fprintf (asm_out_file, "\t%s %s",
3296 ASM_COMMENT_START,
3297 (abbrev->die_child != NULL)
3298 ? "DW_children_yes" : "DW_children_no");
3299 }
3300 fputc ('\n', asm_out_file);
3301 for (a_attr = abbrev->die_attr; a_attr != NULL;
3302 a_attr = a_attr->dw_attr_next)
3303 {
3304 output_uleb128 (a_attr->dw_attr);
3305 if (flag_verbose_asm)
b2932ae5
JM		 3306 fprintf (asm_out_file, " (%s)",
3307 dwarf_attr_name (a_attr->dw_attr));
a3f97cbb
JW		 3308 fputc ('\n', asm_out_file);
3309 output_value_format (&a_attr->dw_attr_val);
3310 }
3311 fprintf (asm_out_file, "\t%s\t0,0\n", ASM_BYTE_OP);
3312 }
3313}
3314
3315/* Output location description stack opcode's operands (if any). */
3316static void
3317output_loc_operands (loc)
3318 register dw_loc_descr_ref loc;
3319{
3320 register dw_val_ref val1 = &loc->dw_loc_oprnd1;
3321 register dw_val_ref val2 = &loc->dw_loc_oprnd2;
3322 switch (loc->dw_loc_opc)
3323 {
3324 case DW_OP_addr:
3325 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file, val1->v.val_addr);
3326 fputc ('\n', asm_out_file);
3327 break;
3328 case DW_OP_const1u:
3329 case DW_OP_const1s:
3330 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
3331 fputc ('\n', asm_out_file);
3332 break;
3333 case DW_OP_const2u:
3334 case DW_OP_const2s:
3335 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
3336 fputc ('\n', asm_out_file);
3337 break;
3338 case DW_OP_const4u:
3339 case DW_OP_const4s:
3340 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, val1->v.val_int);
3341 fputc ('\n', asm_out_file);
3342 break;
3343 case DW_OP_const8u:
3344 case DW_OP_const8s:
3345 ASM_OUTPUT_DWARF_DATA8 (asm_out_file,
3346 val1->v.val_dbl_const.dw_dbl_hi,
3347 val2->v.val_dbl_const.dw_dbl_low);
3348 fputc ('\n', asm_out_file);
3349 break;
3350 case DW_OP_constu:
3351 output_uleb128 (val1->v.val_unsigned);
3352 fputc ('\n', asm_out_file);
3353 break;
3354 case DW_OP_consts:
b2932ae5 3355 output_sleb128 (val1->v.val_int);
a3f97cbb
JW		 3356 fputc ('\n', asm_out_file);
3357 break;
3358 case DW_OP_pick:
3359 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_int);
3360 fputc ('\n', asm_out_file);
3361 break;
3362 case DW_OP_plus_uconst:
3363 output_uleb128 (val1->v.val_unsigned);
3364 fputc ('\n', asm_out_file);
3365 break;
3366 case DW_OP_skip:
3367 case DW_OP_bra:
3368 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
3369 fputc ('\n', asm_out_file);
3370 break;
3371 case DW_OP_breg0:
3372 case DW_OP_breg1:
3373 case DW_OP_breg2:
3374 case DW_OP_breg3:
3375 case DW_OP_breg4:
3376 case DW_OP_breg5:
3377 case DW_OP_breg6:
3378 case DW_OP_breg7:
3379 case DW_OP_breg8:
3380 case DW_OP_breg9:
3381 case DW_OP_breg10:
3382 case DW_OP_breg11:
3383 case DW_OP_breg12:
3384 case DW_OP_breg13:
3385 case DW_OP_breg14:
3386 case DW_OP_breg15:
3387 case DW_OP_breg16:
3388 case DW_OP_breg17:
3389 case DW_OP_breg18:
3390 case DW_OP_breg19:
3391 case DW_OP_breg20:
3392 case DW_OP_breg21:
3393 case DW_OP_breg22:
3394 case DW_OP_breg23:
3395 case DW_OP_breg24:
3396 case DW_OP_breg25:
3397 case DW_OP_breg26:
3398 case DW_OP_breg27:
3399 case DW_OP_breg28:
3400 case DW_OP_breg29:
3401 case DW_OP_breg30:
3402 case DW_OP_breg31:
3403 output_sleb128 (val1->v.val_int);
3404 fputc ('\n', asm_out_file);
3405 break;
3406 case DW_OP_regx:
3407 output_uleb128 (val1->v.val_unsigned);
3408 fputc ('\n', asm_out_file);
3409 break;
3410 case DW_OP_fbreg:
b2932ae5 3411 output_sleb128 (val1->v.val_int);
a3f97cbb
JW		 3412 fputc ('\n', asm_out_file);
3413 break;
3414 case DW_OP_bregx:
3415 output_uleb128 (val1->v.val_unsigned);
3416 fputc ('\n', asm_out_file);
b2932ae5 3417 output_sleb128 (val2->v.val_int);
a3f97cbb
JW		 3418 fputc ('\n', asm_out_file);
3419 break;
3420 case DW_OP_piece:
3421 output_uleb128 (val1->v.val_unsigned);
3422 fputc ('\n', asm_out_file);
3423 break;
3424 case DW_OP_deref_size:
3425 case DW_OP_xderef_size:
3426 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
3427 fputc ('\n', asm_out_file);
3428 break;
3429 default:
3430 break;
3431 }
3432}
3433
3434/* Compute the offset of a sibling. */
3435static unsigned long
3436sibling_offset (die)
3437 dw_die_ref die;
3438{
3439 unsigned long offset;
3440 if (die->die_child_last == NULL)
3441 {
3442 offset = die->die_offset + size_of_die (die);
3443 }
3444 else
3445 {
3446 offset = sibling_offset (die->die_child_last) + 1;
3447 }
3448 return offset;
3449}
3450
3451/* Output the DIE and its attributes. Called recursively to generate
3452 the definitions of each child DIE. */
3453static void
3454output_die (die)
3455 register dw_die_ref die;
3456{
3457 register dw_attr_ref a;
3458 register dw_die_ref c;
3459 register unsigned long ref_offset;
3460 register unsigned long size;
3461 register dw_loc_descr_ref loc;
3462 output_uleb128 (die->die_abbrev);
3463 if (flag_verbose_asm)
b2932ae5
JM		 3464 fprintf (asm_out_file, " (DIE (0x%x) %s)",
3465 die->die_offset, dwarf_tag_name (die->die_tag));
a3f97cbb
JW		 3466 fputc ('\n', asm_out_file);
3467 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
3468 {
3469 switch (a->dw_attr_val.val_class)
3470 {
3471 case dw_val_class_addr:
3472 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file,
3473 a->dw_attr_val.v.val_addr);
3474 break;
3475 case dw_val_class_loc:
f37230f0
JM		 3476 size = size_of_locs (a->dw_attr_val.v.val_loc);
3477 /* Output the block length for this list of location operations. */
3478 switch (constant_size (size))
a3f97cbb 3479 {
f37230f0
JM		 3480 case 1:
3481 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, size);
3482 break;
3483 case 2:
3484 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, size);
3485 break;
3486 default:
3487 abort ();
a3f97cbb 3488 }
a3f97cbb
JW		 3489 if (flag_verbose_asm)
3490 {
3491 fprintf (asm_out_file, "\t%s %s",
3492 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
3493 }
3494 fputc ('\n', asm_out_file);
3495 for (loc = a->dw_attr_val.v.val_loc; loc != NULL;
3496 loc = loc->dw_loc_next)
3497 {
3498 /* Output the opcode. */
3499 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, loc->dw_loc_opc);
3500 if (flag_verbose_asm)
3501 {
3502 fprintf (asm_out_file, "\t%s %s",
3503 ASM_COMMENT_START,
3504 dwarf_stack_op_name (loc->dw_loc_opc));
3505 }
3506 fputc ('\n', asm_out_file);
3507 /* Output the operand(s) (if any). */
3508 output_loc_operands (loc);
3509 }
3510 break;
3511 case dw_val_class_const:
3512 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, a->dw_attr_val.v.val_int);
3513 break;
3514 case dw_val_class_unsigned_const:
7e23cb16
JM		 3515 switch (constant_size (a->dw_attr_val.v.val_unsigned))
3516 {
3517 case 1:
3518 ASM_OUTPUT_DWARF_DATA1
3519 (asm_out_file, a->dw_attr_val.v.val_unsigned);
3520 break;
3521 case 2:
3522 ASM_OUTPUT_DWARF_DATA2
3523 (asm_out_file, a->dw_attr_val.v.val_unsigned);
3524 break;
3525 case 4:
3526 ASM_OUTPUT_DWARF_DATA4
3527 (asm_out_file, a->dw_attr_val.v.val_unsigned);
3528 break;
3529 default:
3530 abort ();
3531 }
a3f97cbb
JW		 3532 break;
3533 case dw_val_class_double_const:
3534 ASM_OUTPUT_DWARF_DATA8 (asm_out_file,
3535 a->dw_attr_val.v.val_dbl_const.dw_dbl_hi,
3536 a->dw_attr_val.v.val_dbl_const.dw_dbl_low);
3537 break;
3538 case dw_val_class_flag:
3539 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, a->dw_attr_val.v.val_flag);
3540 break;
3541 case dw_val_class_die_ref:
3542 if (a->dw_attr_val.v.val_die_ref != NULL)
3543 {
3544 ref_offset = a->dw_attr_val.v.val_die_ref->die_offset;
3545 }
3546 else if (a->dw_attr == DW_AT_sibling)
3547 {
3548 ref_offset = sibling_offset(die);
3549 }
3550 else
3551 {
3552 abort ();
3553 }
7e23cb16 3554 ASM_OUTPUT_DWARF_DATA (asm_out_file, ref_offset);
a3f97cbb
JW		 3555 break;
3556 case dw_val_class_fde_ref:
3557 ref_offset = fde_table[a->dw_attr_val.v.val_fde_index].dw_fde_offset;
7e23cb16 3558 fprintf (asm_out_file, "\t%s\t%s+0x%x", UNALIGNED_OFFSET_ASM_OP,
a3f97cbb
JW		 3559 stripattributes (FRAME_SECTION), ref_offset);
3560 break;
3561 case dw_val_class_lbl_id:
3562 ASM_OUTPUT_DWARF_ADDR (asm_out_file, a->dw_attr_val.v.val_lbl_id);
3563 break;
3564 case dw_val_class_section_offset:
7e23cb16
JM		 3565 ASM_OUTPUT_DWARF_OFFSET
3566 (asm_out_file, stripattributes (a->dw_attr_val.v.val_section));
a3f97cbb
JW		 3567 break;
3568 case dw_val_class_str:
3569 ASM_OUTPUT_DWARF_STRING (asm_out_file, a->dw_attr_val.v.val_str);
3570 break;
3571 default:
3572 abort ();
3573 }
3574 if (a->dw_attr_val.val_class != dw_val_class_loc)
3575 {
3576 if (flag_verbose_asm)
3577 {
3578 fprintf (asm_out_file, "\t%s %s",
3579 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
3580 }
3581 fputc ('\n', asm_out_file);
3582 }
3583 }
3584 for (c = die->die_child; c != NULL; c = c->die_sib)
3585 {
3586 output_die (c);
3587 }
3588 if (die->die_child != NULL)
3589 {
3590 /* Add null byte to terminate sibling list. */
3591 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
b2932ae5
JM		 3592 if (flag_verbose_asm)
3593 fprintf (asm_out_file, "\t%s end of children of DIE 0x%x",
3594 ASM_COMMENT_START, die->die_offset);
a3f97cbb
JW		 3595 fputc ('\n', asm_out_file);
3596 }
3597}
3598
3599/* Output the compilation unit that appears at the beginning of the
3600 .debug_info section, and precedes the DIE descriptions. */
3601static void
3602output_compilation_unit_header ()
3603{
7e23cb16 3604 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset - DWARF_OFFSET_SIZE);
a3f97cbb
JW		 3605 if (flag_verbose_asm)
3606 {
3607 fprintf (asm_out_file, "\t%s Length of Compilation Unit Info.",
3608 ASM_COMMENT_START);
3609 }
3610 fputc ('\n', asm_out_file);
7e23cb16 3611 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
a3f97cbb
JW		 3612 if (flag_verbose_asm)
3613 {
3614 fprintf (asm_out_file, "\t%s DWARF version number",
3615 ASM_COMMENT_START);
3616 }
3617 fputc ('\n', asm_out_file);
7e23cb16 3618 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (ABBREV_SECTION));
a3f97cbb
JW		 3619 if (flag_verbose_asm)
3620 {
3621 fprintf (asm_out_file, "\t%s Offset Into Abbrev. Section",
3622 ASM_COMMENT_START);
3623 }
3624 fputc ('\n', asm_out_file);
7e23cb16 3625 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, PTR_SIZE);
a3f97cbb
JW		 3626 if (flag_verbose_asm)
3627 {
3628 fprintf (asm_out_file, "\t%s Pointer Size (in bytes)",
3629 ASM_COMMENT_START);
3630 }
3631 fputc ('\n', asm_out_file);
3632}
3633
a94dbf2c
JM		 3634/* Extract the register and offset values from RTL. If no register number
3635 is specified, return -1 to indicate frame-relative addressing. */
3636static void
3637decode_cfi_rtl (rtl, regp, offsetp)
3638 register rtx rtl;
3639 register unsigned long *regp;
3640 register long *offsetp;
3641{
3642 switch (GET_CODE (rtl))
3643 {
3644 case REG:
3645 *regp = reg_number (rtl);
3646 *offsetp = 0;
3647 break;
3648 case PLUS:
3649 *regp = reg_number (XEXP (rtl, 0));
3650 *offsetp = INTVAL (XEXP (rtl, 1));
3651 break;
3652 case CONST_INT:
3653 *regp = (unsigned long) -1;
3654 *offsetp = INTVAL (rtl);
3655 break;
3656 default:
3657 abort ();
3658 }
3659}
3660
3661/* Add CFI to the current fde at the PC value indicated by LABEL if specified,
3662 or to the CIE if LABEL is NULL. */
3663static void
3664add_fde_cfi (label, cfi)
3665 register char * label;
3666 register dw_cfi_ref cfi;
3667{
3668 if (label)
3669 {
3670 register dw_fde_ref fde = &fde_table[fde_table_in_use - 1];
3671 if (fde->dw_fde_current_label == NULL
3672 || strcmp (label, fde->dw_fde_current_label) != 0)
3673 {
3674 register dw_cfi_ref xcfi;
3675
3676 fde->dw_fde_current_label = label = xstrdup (label);
3677
3678 /* Set the location counter to the new label. */
3679 xcfi = new_cfi ();
3680 xcfi->dw_cfi_opc = DW_CFA_advance_loc4;
3681 xcfi->dw_cfi_oprnd1.dw_cfi_addr = label;
3682 add_cfi (&fde->dw_fde_cfi, xcfi);
3683 }
3684 add_cfi (&fde->dw_fde_cfi, cfi);
3685 }
3686 else
3687 add_cfi (&cie_cfi_head, cfi);
3688}
3689
3690/* Subroutine of lookup_cfa. */
3691inline void
3692lookup_cfa_1 (cfi, regp, offsetp)
3693 register dw_cfi_ref cfi;
3694 register unsigned long *regp;
3695 register long *offsetp;
3696{
3697 switch (cfi->dw_cfi_opc)
3698 {
3699 case DW_CFA_def_cfa_offset:
3700 *offsetp = cfi->dw_cfi_oprnd1.dw_cfi_offset;
3701 break;
3702 case DW_CFA_def_cfa_register:
3703 *regp = cfi->dw_cfi_oprnd1.dw_cfi_reg_num;
3704 break;
3705 case DW_CFA_def_cfa:
3706 *regp = cfi->dw_cfi_oprnd1.dw_cfi_reg_num;
3707 *offsetp = cfi->dw_cfi_oprnd2.dw_cfi_offset;
3708 break;
3709 }
3710}
3711
3712/* Find the previous value for the CFA. */
3713static void
3714lookup_cfa (regp, offsetp)
3715 register unsigned long *regp;
3716 register long *offsetp;
3717{
3718 register dw_cfi_ref cfi;
3719 *regp = (unsigned long) -1;
3720 *offsetp = 0;
3721
3722 for (cfi = cie_cfi_head; cfi; cfi = cfi->dw_cfi_next)
3723 lookup_cfa_1 (cfi, regp, offsetp);
3724 if (fde_table_in_use)
3725 {
3726 register dw_fde_ref fde = &fde_table[fde_table_in_use - 1];
3727 for (cfi = fde->dw_fde_cfi; cfi; cfi = cfi->dw_cfi_next)
3728 lookup_cfa_1 (cfi, regp, offsetp);
3729 }
3730}
3731
3732/* Entry point to update the canonical frame address (CFA).
3733 LABEL is passed to add_fde_cfi. RTL is either:
3734
3735 a REG: The frame is at 0(REG).
3736 a PLUS of a REG and a CONST_INT: The frame is at CONST(REG). */
3737void
3738dwarf2out_def_cfa (label, rtl)
3739 register char * label;
3740 register rtx rtl;
3741{
3742 register dw_cfi_ref cfi;
3743 unsigned long reg, old_reg;
3744 long offset, old_offset;
3745
3746 decode_cfi_rtl (rtl, &reg, &offset);
3747 lookup_cfa (&old_reg, &old_offset);
3748
3749 if (reg == old_reg && offset == old_offset)
3750 return;
3751
3752 cfi = new_cfi ();
3753
3754 if (reg == old_reg)
3755 {
3756 cfi->dw_cfi_opc = DW_CFA_def_cfa_offset;
3757 cfi->dw_cfi_oprnd1.dw_cfi_offset = offset;
3758 }
3759#ifndef MIPS_DEBUGGING_INFO /* SGI dbx thinks this means no offset. */
3760 else if (offset == old_offset && old_reg != (unsigned long) -1)
3761 {
3762 cfi->dw_cfi_opc = DW_CFA_def_cfa_register;
3763 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
3764 }
3765#endif
3766 else
3767 {
3768 cfi->dw_cfi_opc = DW_CFA_def_cfa;
3769 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
3770 cfi->dw_cfi_oprnd2.dw_cfi_offset = offset;
3771 }
3772
3773 add_fde_cfi (label, cfi);
3774}
3775
3776/* Add the CFI for saving a register. REG is the CFA column number.
3777 LABEL is passed to add_fde_cfi.
3778 RTL is either:
3779
3780 a REG: The register is saved in REG.
3781 a CONST_INT: The register is saved at an offset of CONST
3782 from the CFA. */
3783static void
3784reg_save (label, reg, rtl)
3785 register char * label;
3786 register unsigned long reg;
3787 register rtx rtl;
3788{
3789 register dw_cfi_ref cfi;
3790 unsigned long sreg;
3791 long offset;
3792
3793 cfi = new_cfi ();
3794
3795 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
3796
3797 decode_cfi_rtl (rtl, &sreg, &offset);
3798 offset /= DWARF_CIE_DATA_ALIGNMENT;
3799
3800 if (sreg == (unsigned long) -1)
3801 {
3802 if (reg & ~0x3f)
3803 /* The register number won't fit in 6 bits, so we have to use
3804 the long form. */
3805 cfi->dw_cfi_opc = DW_CFA_offset_extended;
3806 else
3807 cfi->dw_cfi_opc = DW_CFA_offset;
3808 cfi->dw_cfi_oprnd2.dw_cfi_offset = offset;
3809 }
3810 else
3811 {
3812 cfi->dw_cfi_opc = DW_CFA_register;
3813 cfi->dw_cfi_oprnd2.dw_cfi_reg_num = sreg;
3814 }
3815
3816 add_fde_cfi (label, cfi);
3817}
3818
3819/* Entry point for saving a register. REG is the GCC register number.
3820 LABEL and RTL are passed to reg_save. */
3821void
3822dwarf2out_reg_save (label, reg, rtl)
3823 register char * label;
3824 register unsigned long reg;
3825 register rtx rtl;
3826{
3827 reg_save (label, DWARF_FRAME_REGNUM (reg), rtl);
3828}
3829
3830/* Entry point for saving the return address.
3831 LABEL and RTL are passed to reg_save. */
3832void
3833dwarf2out_return_save (label, rtl)
3834 register char * label;
3835 register rtx rtl;
3836{
3837 reg_save (label, DWARF_FRAME_RETURN_COLUMN, rtl);
3838}
3839
a3f97cbb
JW		 3840/* Return the size of a Call Frame Instruction. */
3841static unsigned long
3842size_of_cfi (cfi)
3843 dw_cfi_ref cfi;
3844{
3845 register unsigned long size;
3846 /* count the 1-byte opcode */
3847 size = 1;
3848 switch (cfi->dw_cfi_opc)
3849 {
3850 case DW_CFA_offset:
3851 size += size_of_uleb128(cfi->dw_cfi_oprnd2.dw_cfi_offset);
3852 break;
3853 case DW_CFA_set_loc:
3854 size += PTR_SIZE;
3855 break;
3856 case DW_CFA_advance_loc1:
3857 size += 1;
3858 break;
3859 case DW_CFA_advance_loc2:
3860 size += 2;
3861 break;
3862 case DW_CFA_advance_loc4:
3863 size += 4;
3864 break;
3865#ifdef MIPS_DEBUGGING_INFO
3866 case DW_CFA_MIPS_advance_loc8:
3867 size += 8;
3868 break;
3869#endif
3870 case DW_CFA_offset_extended:
3871 case DW_CFA_def_cfa:
3872 size += size_of_uleb128(cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
3873 size += size_of_uleb128(cfi->dw_cfi_oprnd2.dw_cfi_offset);
3874 break;
3875 case DW_CFA_restore_extended:
3876 case DW_CFA_undefined:
3877 size += size_of_uleb128(cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
3878 break;
3879 case DW_CFA_same_value:
3880 case DW_CFA_def_cfa_register:
3881 size += size_of_uleb128(cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
3882 break;
3883 case DW_CFA_register:
3884 size += size_of_uleb128(cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
3885 size += size_of_uleb128(cfi->dw_cfi_oprnd2.dw_cfi_reg_num);
3886 break;
3887 case DW_CFA_def_cfa_offset:
3888 size += size_of_uleb128(cfi->dw_cfi_oprnd1.dw_cfi_offset);
3889 break;
3890 default:
3891 break;
3892 }
3893 return size;
3894}
3895
3896/* Return the size of an FDE sans the length word. */
3897inline unsigned long
3898size_of_fde (fde, npad)
3899 dw_fde_ref fde;
3900 unsigned long *npad;
3901{
3902 register dw_cfi_ref cfi;
3903 register unsigned long aligned_size;
3904 register unsigned long size;
3905 size = DWARF_FDE_HEADER_SIZE;
3906 for (cfi = fde->dw_fde_cfi; cfi != NULL; cfi = cfi->dw_cfi_next)
3907 {
3908 size += size_of_cfi(cfi);
3909 }
7e23cb16
JM		 3910 /* Round the size up to a word boundary. */
3911 aligned_size = DWARF_ROUND (size, PTR_SIZE);
a3f97cbb
JW		 3912 *npad = aligned_size - size;
3913 return aligned_size;
3914}
3915
3916/* Calculate the size of the FDE table, and establish the offset
3917 of each FDE in the .debug_frame section. */
3918static void
3919calc_fde_sizes ()
3920{
3921 register unsigned long i;
3922 register dw_fde_ref fde;
3923 register unsigned long fde_size;
a94dbf2c 3924 register dw_cfi_ref cfi;
a3f97cbb 3925 unsigned long fde_pad;
a94dbf2c
JM		 3926
3927 cie_size = DWARF_CIE_HEADER_SIZE;
3928 for (cfi = cie_cfi_head; cfi != NULL; cfi = cfi->dw_cfi_next)
3929 cie_size += size_of_cfi (cfi);
3930
3931 /* Initialize the beginning FDE offset. */
3932 next_fde_offset = DWARF_ROUND (cie_size, PTR_SIZE);
3933
a3f97cbb
JW		 3934 for (i = 0; i < fde_table_in_use; ++i)
3935 {
3936 fde = &fde_table[i];
3937 fde->dw_fde_offset = next_fde_offset;
3938 fde_size = size_of_fde (fde, &fde_pad);
3939 next_fde_offset += fde_size;
3940 }
3941}
3942
3943/* Output a Call Frame Information opcode and its operand(s). */
3944static void
3945output_cfi (cfi, fde)
3946 register dw_cfi_ref cfi;
3947 register dw_fde_ref fde;
3948{
3949 if (cfi->dw_cfi_opc == DW_CFA_advance_loc)
3950 {
3951 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
3952 cfi->dw_cfi_opc
3953 | (cfi->dw_cfi_oprnd1.dw_cfi_offset & 0x3f));
3954 if (flag_verbose_asm)
3955 {
3956 fprintf (asm_out_file, "\t%s DW_CFA_advance_loc", ASM_COMMENT_START);
3957 }
3958 fputc ('\n', asm_out_file);
3959 }
3960 else if (cfi->dw_cfi_opc == DW_CFA_offset)
3961 {
3962 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
3963 cfi->dw_cfi_opc
3964 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
3965 if (flag_verbose_asm)
3966 {
3967 fprintf (asm_out_file, "\t%s DW_CFA_offset", ASM_COMMENT_START);
3968 }
3969 fputc ('\n', asm_out_file);
3970 output_uleb128(cfi->dw_cfi_oprnd2.dw_cfi_offset);
3971 fputc ('\n', asm_out_file);
3972 }
3973 else if (cfi->dw_cfi_opc == DW_CFA_restore)
3974 {
3975 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
3976 cfi->dw_cfi_opc
3977 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
3978 if (flag_verbose_asm)
3979 {
3980 fprintf (asm_out_file, "\t%s DW_CFA_restore", ASM_COMMENT_START);
3981 }
3982 fputc ('\n', asm_out_file);
3983 }
3984 else
3985 {
3986 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, cfi->dw_cfi_opc);
3987 if (flag_verbose_asm)
3988 {
3989 fprintf (asm_out_file, "\t%s %s",
3990 ASM_COMMENT_START,
3991 dwarf_cfi_name (cfi->dw_cfi_opc));
3992 }
3993 fputc ('\n', asm_out_file);
3994 switch (cfi->dw_cfi_opc)
3995 {
3996 case DW_CFA_set_loc:
3997 ASM_OUTPUT_DWARF_ADDR (asm_out_file,
3998 cfi->dw_cfi_oprnd1.dw_cfi_addr);
3999 fputc ('\n', asm_out_file);
4000 break;
4001 case DW_CFA_advance_loc1:
4002 /* TODO: not currently implemented. */
4003 abort ();
4004 break;
4005 case DW_CFA_advance_loc2:
4006 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file,
4007 cfi->dw_cfi_oprnd1.dw_cfi_addr,
a94dbf2c 4008 fde->dw_fde_current_label);
a3f97cbb 4009 fputc ('\n', asm_out_file);
a94dbf2c 4010 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
a3f97cbb
JW		 4011 break;
4012 case DW_CFA_advance_loc4:
4013 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file,
4014 cfi->dw_cfi_oprnd1.dw_cfi_addr,
a94dbf2c 4015 fde->dw_fde_current_label);
a3f97cbb 4016 fputc ('\n', asm_out_file);
a94dbf2c 4017 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
a3f97cbb
JW		 4018 break;
4019#ifdef MIPS_DEBUGGING_INFO
4020 case DW_CFA_MIPS_advance_loc8:
4021 /* TODO: not currently implemented. */
4022 abort ();
4023 break;
4024#endif
4025 case DW_CFA_offset_extended:
4026 case DW_CFA_def_cfa:
4027 output_uleb128(cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
4028 fputc ('\n', asm_out_file);
4029 output_uleb128(cfi->dw_cfi_oprnd2.dw_cfi_offset);
4030 fputc ('\n', asm_out_file);
4031 break;
4032 case DW_CFA_restore_extended:
4033 case DW_CFA_undefined:
4034 output_uleb128(cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
4035 fputc ('\n', asm_out_file);
4036 break;
4037 case DW_CFA_same_value:
4038 case DW_CFA_def_cfa_register:
4039 output_uleb128(cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
4040 fputc ('\n', asm_out_file);
4041 break;
4042 case DW_CFA_register:
4043 output_uleb128(cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
4044 fputc ('\n', asm_out_file);
4045 output_uleb128(cfi->dw_cfi_oprnd2.dw_cfi_reg_num);
4046 fputc ('\n', asm_out_file);
4047 break;
4048 case DW_CFA_def_cfa_offset:
4049 output_uleb128(cfi->dw_cfi_oprnd1.dw_cfi_offset);
4050 fputc ('\n', asm_out_file);
4051 break;
4052 default:
4053 break;
4054 }
4055 }
4056}
4057
4058/* Output the call frame information used to used to record information
4059 that relates to calculating the frame pointer, and records the
4060 location of saved registers. */
4061static void
4062output_call_frame_info ()
4063{
4064 register unsigned long i, j;
4065 register dw_fde_ref fde;
4066 register unsigned long fde_size;
a3f97cbb
JW		 4067 register dw_cfi_ref cfi;
4068 unsigned long fde_pad;
4069
b2932ae5
JM		 4070 /* Only output the info if it will be interesting. */
4071 for (i = 0; i < fde_table_in_use; ++i)
4072 if (fde_table[i].dw_fde_cfi != NULL)
4073 break;
4074 if (i == fde_table_in_use)
4075 return;
4076
a94dbf2c
JM		 4077 /* (re-)initialize the beginning FDE offset. */
4078 next_fde_offset = DWARF_ROUND (cie_size, PTR_SIZE);
4079
b2932ae5
JM		 4080 fputc ('\n', asm_out_file);
4081 ASM_OUTPUT_SECTION (asm_out_file, FRAME_SECTION);
4082
a3f97cbb 4083 /* Output the CIE. */
a94dbf2c 4084 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_fde_offset - DWARF_OFFSET_SIZE);
a3f97cbb
JW		 4085 if (flag_verbose_asm)
4086 {
4087 fprintf (asm_out_file, "\t%s Length of Common Information Entry",
4088 ASM_COMMENT_START);
4089 }
4090 fputc ('\n', asm_out_file);
4091 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
4092 if (flag_verbose_asm)
4093 {
4094 fprintf (asm_out_file, "\t%s CIE Identifier Tag",
4095 ASM_COMMENT_START);
4096 }
4097 fputc ('\n', asm_out_file);
7e23cb16
JM		 4098 if (DWARF_OFFSET_SIZE == 8)
4099 {
4100 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
4101 fputc ('\n', asm_out_file);
4102 }
a3f97cbb
JW		 4103 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_CIE_VERSION);
4104 if (flag_verbose_asm)
4105 {
4106 fprintf (asm_out_file, "\t%s CIE Version",
4107 ASM_COMMENT_START);
4108 }
4109 fputc ('\n', asm_out_file);
4110 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
4111 if (flag_verbose_asm)
4112 {
4113 fprintf (asm_out_file, "\t%s CIE Augmentation (none)",
4114 ASM_COMMENT_START);
4115 }
4116 fputc ('\n', asm_out_file);
4117 output_uleb128 (1);
4118 if (flag_verbose_asm)
b2932ae5 4119 fprintf (asm_out_file, " (CIE Code Alignment Factor)");
a3f97cbb
JW		 4120 fputc ('\n', asm_out_file);
4121 output_sleb128 (DWARF_CIE_DATA_ALIGNMENT);
4122 if (flag_verbose_asm)
b2932ae5 4123 fprintf (asm_out_file, " (CIE Data Alignment Factor)");
a3f97cbb 4124 fputc ('\n', asm_out_file);
c8cc5c4a 4125 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_FRAME_RETURN_COLUMN);
a3f97cbb
JW		 4126 if (flag_verbose_asm)
4127 {
4128 fprintf (asm_out_file, "\t%s CIE RA Column",
4129 ASM_COMMENT_START);
4130 }
4131 fputc ('\n', asm_out_file);
4132
a94dbf2c
JM		 4133 for (cfi = cie_cfi_head; cfi != NULL; cfi = cfi->dw_cfi_next)
4134 output_cfi (cfi);
a3f97cbb
JW		 4135
4136 /* Pad the CIE out to an address sized boundary. */
a94dbf2c 4137 for (i = next_fde_offset - cie_size; i; --i)
a3f97cbb
JW		 4138 {
4139 /* Pad out to a pointer size boundary */
4140 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_CFA_nop);
4141 if (flag_verbose_asm)
4142 {
4143 fprintf (asm_out_file, "\t%s CIE DW_CFA_nop (pad)",
4144 ASM_COMMENT_START);
4145 }
4146 fputc ('\n', asm_out_file);
4147 }
4148
4149 /* Loop through all of the FDE's. */
4150 for (i = 0; i < fde_table_in_use; ++i)
4151 {
4152 fde = &fde_table[i];
b2932ae5
JM		 4153 if (fde->dw_fde_cfi == NULL)
4154 continue;
a3f97cbb 4155 fde_size = size_of_fde (fde, &fde_pad);
7e23cb16 4156 ASM_OUTPUT_DWARF_DATA (asm_out_file, fde_size - DWARF_OFFSET_SIZE);
a3f97cbb
JW		 4157 if (flag_verbose_asm)
4158 {
4159 fprintf (asm_out_file, "\t%s FDE Length",
4160 ASM_COMMENT_START);
4161 }
4162 fputc ('\n', asm_out_file);
7e23cb16 4163 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (FRAME_SECTION));
a3f97cbb
JW		 4164 if (flag_verbose_asm)
4165 {
4166 fprintf (asm_out_file, "\t%s FDE CIE offset",
4167 ASM_COMMENT_START);
4168 }
4169 fputc ('\n', asm_out_file);
4170 ASM_OUTPUT_DWARF_ADDR (asm_out_file, fde->dw_fde_begin);
4171 if (flag_verbose_asm)
4172 {
4173 fprintf (asm_out_file, "\t%s FDE initial location",
4174 ASM_COMMENT_START);
4175 }
4176 fputc ('\n', asm_out_file);
7e23cb16
JM		 4177 ASM_OUTPUT_DWARF_ADDR_DELTA
4178 (asm_out_file, fde->dw_fde_end, fde->dw_fde_begin);
a3f97cbb
JW		 4179 if (flag_verbose_asm)
4180 {
4181 fprintf (asm_out_file, "\t%s FDE address range",
4182 ASM_COMMENT_START);
4183 }
4184 fputc ('\n', asm_out_file);
4185
4186 /* Loop through the Call Frame Instructions associated with
4187 this FDE. */
a94dbf2c 4188 fde->dw_fde_current_label = fde->dw_fde_begin;
a3f97cbb 4189 for (cfi = fde->dw_fde_cfi; cfi != NULL; cfi = cfi->dw_cfi_next)
a94dbf2c 4190 output_cfi (cfi, fde);
a3f97cbb
JW		 4191
4192 /* Pad to a double word boundary. */
4193 for (j = 0; j < fde_pad; ++j)
4194 {
4195 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_CFA_nop);
4196 if (flag_verbose_asm)
4197 {
4198 fprintf (asm_out_file, "\t%s CIE DW_CFA_nop (pad)",
4199 ASM_COMMENT_START);
4200 }
4201 fputc ('\n', asm_out_file);
4202 }
4203 }
4204}
4205
d291dd49
JM		 4206/* Add a new entry to .debug_pubnames if appropriate. */
4207static void
4208add_pubname (decl, die)
4209 tree decl;
4210 dw_die_ref die;
4211{
4212 pubname_ref p;
4213
4214 if (! TREE_PUBLIC (decl))
4215 return;
4216
4217 if (pubname_table_in_use == pubname_table_allocated)
4218 {
4219 pubname_table_allocated += PUBNAME_TABLE_INCREMENT;
4220 pubname_table = (pubname_ref) xrealloc
4221 (pubname_table, pubname_table_allocated * sizeof (pubname_entry));
4222 }
4223 p = &pubname_table[pubname_table_in_use++];
4224 p->die = die;
4225 p->name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
4226}
4227
a3f97cbb
JW		 4228/* Output the public names table used to speed up access to externally
4229 visible names. For now, only generate entries for externally
4230 visible procedures. */
4231static void
4232output_pubnames ()
4233{
d291dd49
JM		 4234 register unsigned i;
4235 {
4236 register unsigned long pubnames_length = size_of_pubnames ();
7e23cb16 4237 ASM_OUTPUT_DWARF_DATA (asm_out_file, pubnames_length);
d291dd49 4238 }
a3f97cbb
JW		 4239 if (flag_verbose_asm)
4240 {
4241 fprintf (asm_out_file, "\t%s Length of Public Names Info.",
4242 ASM_COMMENT_START);
4243 }
4244 fputc ('\n', asm_out_file);
4245 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
4246 if (flag_verbose_asm)
4247 {
4248 fprintf (asm_out_file, "\t%s DWARF Version",
4249 ASM_COMMENT_START);
4250 }
4251 fputc ('\n', asm_out_file);
7e23cb16 4252 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (DEBUG_SECTION));
a3f97cbb
JW		 4253 if (flag_verbose_asm)
4254 {
4255 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
4256 ASM_COMMENT_START);
4257 }
4258 fputc ('\n', asm_out_file);
7e23cb16 4259 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset);
a3f97cbb
JW		 4260 if (flag_verbose_asm)
4261 {
4262 fprintf (asm_out_file, "\t%s Compilation Unit Length",
4263 ASM_COMMENT_START);
4264 }
4265 fputc ('\n', asm_out_file);
d291dd49 4266 for (i = 0; i < pubname_table_in_use; ++i)
a3f97cbb 4267 {
d291dd49 4268 register pubname_ref pub = &pubname_table[i];
7e23cb16 4269 ASM_OUTPUT_DWARF_DATA (asm_out_file, pub->die->die_offset);
d291dd49 4270 if (flag_verbose_asm)
a3f97cbb 4271 {
d291dd49
JM		 4272 fprintf (asm_out_file, "\t%s DIE offset",
4273 ASM_COMMENT_START);
a3f97cbb 4274 }
d291dd49
JM		 4275 fputc ('\n', asm_out_file);
4276
4277 ASM_OUTPUT_DWARF_STRING (asm_out_file, pub->name);
4278 if (flag_verbose_asm)
4279 {
4280 fprintf (asm_out_file, "%s external name",
4281 ASM_COMMENT_START);
4282 }
4283 fputc ('\n', asm_out_file);
a3f97cbb 4284 }
7e23cb16 4285 ASM_OUTPUT_DWARF_DATA (asm_out_file, 0);
a3f97cbb
JW		 4286 fputc ('\n', asm_out_file);
4287}
4288
d291dd49
JM		 4289/* Add a new entry to .debug_aranges if appropriate. */
4290static void
4291add_arange (decl, die)
4292 tree decl;
4293 dw_die_ref die;
4294{
4295 if (! DECL_SECTION_NAME (decl))
4296 return;
4297
4298 if (arange_table_in_use == arange_table_allocated)
4299 {
4300 arange_table_allocated += ARANGE_TABLE_INCREMENT;
4301 arange_table = (arange_ref) xrealloc
4302 (arange_table, arange_table_allocated * sizeof (dw_die_ref));
4303 }
4304 arange_table[arange_table_in_use++] = die;
4305}
4306
a3f97cbb
JW		 4307/* Output the information that goes into the .debug_aranges table.
4308 Namely, define the beginning and ending address range of the
4309 text section generated for this compilation unit. */
4310static void
4311output_aranges ()
4312{
d291dd49
JM		 4313 register unsigned i;
4314 {
4315 register unsigned long aranges_length = size_of_aranges ();
7e23cb16 4316 ASM_OUTPUT_DWARF_DATA (asm_out_file, aranges_length);
d291dd49 4317 }
a3f97cbb
JW		 4318 if (flag_verbose_asm)
4319 {
4320 fprintf (asm_out_file, "\t%s Length of Address Ranges Info.",
4321 ASM_COMMENT_START);
4322 }
4323 fputc ('\n', asm_out_file);
4324 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
4325 if (flag_verbose_asm)
4326 {
4327 fprintf (asm_out_file, "\t%s DWARF Version",
4328 ASM_COMMENT_START);
4329 }
4330 fputc ('\n', asm_out_file);
7e23cb16 4331 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (DEBUG_SECTION));
a3f97cbb
JW		 4332 if (flag_verbose_asm)
4333 {
4334 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
4335 ASM_COMMENT_START);
4336 }
4337 fputc ('\n', asm_out_file);
4338 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, PTR_SIZE);
4339 if (flag_verbose_asm)
4340 {
4341 fprintf (asm_out_file, "\t%s Size of Address",
4342 ASM_COMMENT_START);
4343 }
4344 fputc ('\n', asm_out_file);
4345 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
4346 if (flag_verbose_asm)
4347 {
4348 fprintf (asm_out_file, "\t%s Size of Segment Descriptor",
4349 ASM_COMMENT_START);
4350 }
4351 fputc ('\n', asm_out_file);
4352 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 4);
7e23cb16
JM		 4353 if (PTR_SIZE == 8)
4354 fprintf (asm_out_file, ",0,0");
a3f97cbb
JW		 4355 if (flag_verbose_asm)
4356 {
7e23cb16
JM		 4357 fprintf (asm_out_file, "\t%s Pad to %d byte boundary",
4358 ASM_COMMENT_START, 2 * PTR_SIZE);
a3f97cbb
JW		 4359 }
4360 fputc ('\n', asm_out_file);
bdb669cb 4361 ASM_OUTPUT_DWARF_ADDR (asm_out_file, TEXT_SECTION);
a3f97cbb
JW		 4362 if (flag_verbose_asm)
4363 {
4364 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
4365 }
4366 fputc ('\n', asm_out_file);
5c90448c 4367 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, text_end_label, TEXT_SECTION);
a3f97cbb
JW		 4368 if (flag_verbose_asm)
4369 {
4370 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
4371 }
4372 fputc ('\n', asm_out_file);
d291dd49
JM		 4373 for (i = 0; i < arange_table_in_use; ++i)
4374 {
4375 dw_die_ref a = arange_table[i];
4376 if (a->die_tag == DW_TAG_subprogram)
4377 ASM_OUTPUT_DWARF_ADDR (asm_out_file, get_AT_low_pc (a));
4378 else
4379 ASM_OUTPUT_DWARF_ADDR (asm_out_file, get_AT_string (a, DW_AT_name));
4380 if (flag_verbose_asm)
4381 {
4382 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
4383 }
4384 fputc ('\n', asm_out_file);
4385 if (a->die_tag == DW_TAG_subprogram)
7e23cb16
JM		 4386 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, get_AT_hi_pc (a),
4387 get_AT_low_pc (a));
d291dd49 4388 else
7e23cb16
JM		 4389 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file,
4390 get_AT_unsigned (a, DW_AT_byte_size));
d291dd49
JM		 4391 if (flag_verbose_asm)
4392 {
4393 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
4394 }
4395 fputc ('\n', asm_out_file);
4396 }
a3f97cbb 4397 /* Output the terminator words. */
7e23cb16 4398 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
a3f97cbb 4399 fputc ('\n', asm_out_file);
7e23cb16 4400 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
a3f97cbb
JW		 4401 fputc ('\n', asm_out_file);
4402}
4403
4404/* Output the source line number correspondence information. This
4405 information goes into the .debug_line section. */
4406static void
4407output_line_info ()
4408{
a3f97cbb
JW		 4409 char line_label[MAX_ARTIFICIAL_LABEL_BYTES];
4410 char prev_line_label[MAX_ARTIFICIAL_LABEL_BYTES];
4411 register unsigned opc;
4412 register unsigned n_op_args;
a3f97cbb
JW		 4413 register unsigned long ft_index;
4414 register unsigned long lt_index;
4415 register unsigned long current_line;
4416 register long line_offset;
4417 register long line_delta;
4418 register unsigned long current_file;
e90b62db 4419 register unsigned long function;
7e23cb16 4420 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_info ());
a3f97cbb
JW		 4421 if (flag_verbose_asm)
4422 {
4423 fprintf (asm_out_file, "\t%s Length of Source Line Info.",
4424 ASM_COMMENT_START);
4425 }
4426 fputc ('\n', asm_out_file);
4427 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
4428 if (flag_verbose_asm)
4429 {
4430 fprintf (asm_out_file, "\t%s DWARF Version",
4431 ASM_COMMENT_START);
4432 }
4433 fputc ('\n', asm_out_file);
7e23cb16 4434 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_prolog ());
a3f97cbb
JW		 4435 if (flag_verbose_asm)
4436 {
4437 fprintf (asm_out_file, "\t%s Prolog Length",
4438 ASM_COMMENT_START);
4439 }
4440 fputc ('\n', asm_out_file);
4441 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_MIN_INSTR_LENGTH);
4442 if (flag_verbose_asm)
4443 {
4444 fprintf (asm_out_file, "\t%s Minimum Instruction Length",
4445 ASM_COMMENT_START);
4446 }
4447 fputc ('\n', asm_out_file);
4448 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_DEFAULT_IS_STMT_START);
4449 if (flag_verbose_asm)
4450 {
4451 fprintf (asm_out_file, "\t%s Default is_stmt_start flag",
4452 ASM_COMMENT_START);
4453 }
4454 fputc ('\n', asm_out_file);
4455 fprintf (asm_out_file, "\t%s\t%d", ASM_BYTE_OP, DWARF_LINE_BASE);
4456 if (flag_verbose_asm)
4457 {
4458 fprintf (asm_out_file, "\t%s Line Base Value (Special Opcodes)",
4459 ASM_COMMENT_START);
4460 }
4461 fputc ('\n', asm_out_file);
4462 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_RANGE);
4463 if (flag_verbose_asm)
4464 {
4465 fprintf (asm_out_file, "\t%s Line Range Value (Special Opcodes)",
4466 ASM_COMMENT_START);
4467 }
4468 fputc ('\n', asm_out_file);
4469 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_OPCODE_BASE);
4470 if (flag_verbose_asm)
4471 {
4472 fprintf (asm_out_file, "\t%s Special Opcode Base",
4473 ASM_COMMENT_START);
4474 }
4475 fputc ('\n', asm_out_file);
4476 for (opc = 1; opc < DWARF_LINE_OPCODE_BASE; ++opc)
4477 {
4478 switch (opc)
4479 {
4480 case DW_LNS_advance_pc:
4481 case DW_LNS_advance_line:
4482 case DW_LNS_set_file:
4483 case DW_LNS_set_column:
4484 case DW_LNS_fixed_advance_pc:
4485 n_op_args = 1;
4486 break;
4487 default:
4488 n_op_args = 0;
4489 break;
4490 }
4491 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, n_op_args);
4492 if (flag_verbose_asm)
4493 {
4494 fprintf (asm_out_file, "\t%s opcode: 0x%x has %d args",
4495 ASM_COMMENT_START, opc, n_op_args);
4496 }
4497 fputc ('\n', asm_out_file);
4498 }
4499 if (flag_verbose_asm)
4500 {
4501 fprintf (asm_out_file, "%s Include Directory Table\n",
4502 ASM_COMMENT_START);
4503 }
4504 /* Include directory table is empty, at present */
4505 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
4506 fputc ('\n', asm_out_file);
4507 if (flag_verbose_asm)
4508 {
4509 fprintf (asm_out_file, "%s File Name Table\n", ASM_COMMENT_START);
4510 }
4511 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
4512 {
4513 ASM_OUTPUT_DWARF_STRING (asm_out_file, file_table[ft_index]);
4514 if (flag_verbose_asm)
4515 {
4516 fprintf (asm_out_file, "%s File Entry: 0x%x",
4517 ASM_COMMENT_START, ft_index);
4518 }
4519 fputc ('\n', asm_out_file);
4520 /* Include directory index */
4521 output_uleb128 (0);
4522 fputc ('\n', asm_out_file);
4523 /* Modification time */
4524 output_uleb128 (0);
4525 fputc ('\n', asm_out_file);
4526 /* File length in bytes */
4527 output_uleb128 (0);
4528 fputc ('\n', asm_out_file);
4529 }
4530 /* Terminate the file name table */
4531 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
4532 fputc ('\n', asm_out_file);
4533
4534 /* Set the address register to the first location in the text section */
4535 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
4536 if (flag_verbose_asm)
4537 {
4538 fprintf (asm_out_file, "\t%s DW_LNE_set_address", ASM_COMMENT_START);
4539 }
4540 fputc ('\n', asm_out_file);
4541 output_uleb128 (1 + PTR_SIZE);
4542 fputc ('\n', asm_out_file);
4543 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
4544 fputc ('\n', asm_out_file);
bdb669cb 4545 ASM_OUTPUT_DWARF_ADDR (asm_out_file, TEXT_SECTION);
a3f97cbb
JW		 4546 fputc ('\n', asm_out_file);
4547
4548 /* Generate the line number to PC correspondence table, encoded as
4549 a series of state machine operations. */
4550 current_file = 1;
4551 current_line = 1;
bdb669cb 4552 strcpy (prev_line_label, TEXT_SECTION);
a3f97cbb
JW		 4553 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
4554 {
e90b62db 4555 register dw_line_info_ref line_info;
a3f97cbb
JW		 4556 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
4557 if (flag_verbose_asm)
4558 {
4559 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
4560 ASM_COMMENT_START);
4561 }
4562 fputc ('\n', asm_out_file);
5c90448c 4563 ASM_GENERATE_INTERNAL_LABEL (line_label, LINE_CODE_LABEL, lt_index);
a3f97cbb
JW		 4564 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label, prev_line_label);
4565 fputc ('\n', asm_out_file);
4566 line_info = &line_info_table[lt_index];
4567 if (line_info->dw_file_num != current_file)
4568 {
4569 current_file = line_info->dw_file_num;
4570 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
4571 if (flag_verbose_asm)
4572 {
4573 fprintf (asm_out_file,
4574 "\t%s DW_LNS_set_file", ASM_COMMENT_START);
4575 }
4576 fputc ('\n', asm_out_file);
4577 output_uleb128 (current_file);
4578 if (flag_verbose_asm)
b2932ae5 4579 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
a3f97cbb
JW		 4580 fputc ('\n', asm_out_file);
4581 }
a94dbf2c
JM		 4582 line_offset = line_info->dw_line_num - current_line;
4583 line_delta = line_offset - DWARF_LINE_BASE;
4584 current_line = line_info->dw_line_num;
4585 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
a3f97cbb 4586 {
a94dbf2c
JM		 4587 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
4588 DWARF_LINE_OPCODE_BASE + line_delta);
4589 if (flag_verbose_asm)
a3f97cbb 4590 {
a94dbf2c
JM		 4591 fprintf (asm_out_file,
4592 "\t%s line %d", ASM_COMMENT_START, current_line);
a3f97cbb 4593 }
a94dbf2c
JM		 4594 fputc ('\n', asm_out_file);
4595 }
4596 else
4597 {
4598 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
4599 if (flag_verbose_asm)
a3f97cbb 4600 {
a94dbf2c
JM		 4601 fprintf (asm_out_file,
4602 "\t%s advance to line %d",
4603 ASM_COMMENT_START, current_line);
a3f97cbb 4604 }
a94dbf2c
JM		 4605 fputc ('\n', asm_out_file);
4606 output_sleb128 (line_offset);
4607 fputc ('\n', asm_out_file);
4608 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
4609 fputc ('\n', asm_out_file);
a3f97cbb
JW		 4610 }
4611 strcpy (prev_line_label, line_label);
4612 }
4613
bdb669cb 4614 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
a3f97cbb
JW		 4615 if (flag_verbose_asm)
4616 {
bdb669cb
JM		 4617 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
4618 ASM_COMMENT_START);
a3f97cbb
JW		 4619 }
4620 fputc ('\n', asm_out_file);
5c90448c 4621 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, text_end_label, prev_line_label);
a3f97cbb 4622 fputc ('\n', asm_out_file);
bdb669cb 4623
a3f97cbb
JW		 4624 /* Output the marker for the end of the line number info. */
4625 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
4626 if (flag_verbose_asm)
4627 {
4628 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence", ASM_COMMENT_START);
4629 }
4630 fputc ('\n', asm_out_file);
4631 output_uleb128 (1);
4632 fputc ('\n', asm_out_file);
4633 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
4634 fputc ('\n', asm_out_file);
e90b62db
JM		 4635
4636 function = 0;
4637 current_file = 1;
4638 current_line = 1;
4639 for (lt_index = 0; lt_index < separate_line_info_table_in_use; )
4640 {
4641 register dw_separate_line_info_ref line_info
4642 = &separate_line_info_table[lt_index];
5c90448c
JM		 4643 ASM_GENERATE_INTERNAL_LABEL (line_label, SEPARATE_LINE_CODE_LABEL,
4644 lt_index);
e90b62db
JM		 4645 if (function != line_info->function)
4646 {
4647 function = line_info->function;
4648 /* Set the address register to the first line in the function */
4649 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
4650 if (flag_verbose_asm)
4651 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
4652 ASM_COMMENT_START);
4653 fputc ('\n', asm_out_file);
4654 output_uleb128 (1 + PTR_SIZE);
4655 fputc ('\n', asm_out_file);
4656 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
4657 fputc ('\n', asm_out_file);
4658 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
4659 fputc ('\n', asm_out_file);
4660 }
4661 else
4662 {
4663 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
4664 if (flag_verbose_asm)
4665 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
4666 ASM_COMMENT_START);
4667 fputc ('\n', asm_out_file);
4668 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label, prev_line_label);
4669 fputc ('\n', asm_out_file);
4670 }
4671 if (line_info->dw_file_num != current_file)
4672 {
4673 current_file = line_info->dw_file_num;
4674 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
4675 if (flag_verbose_asm)
4676 {
4677 fprintf (asm_out_file,
4678 "\t%s DW_LNS_set_file", ASM_COMMENT_START);
4679 }
4680 fputc ('\n', asm_out_file);
4681 output_uleb128 (current_file);
4682 if (flag_verbose_asm)
b2932ae5 4683 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
e90b62db
JM		 4684 fputc ('\n', asm_out_file);
4685 }
4686 if (line_info->dw_line_num != current_line)
4687 {
4688 line_offset = line_info->dw_line_num - current_line;
4689 line_delta = line_offset - DWARF_LINE_BASE;
4690 current_line = line_info->dw_line_num;
4691 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
4692 {
4693 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
4694 DWARF_LINE_OPCODE_BASE + line_delta);
4695 if (flag_verbose_asm)
4696 {
4697 fprintf (asm_out_file,
4698 "\t%s line %d", ASM_COMMENT_START, current_line);
4699 }
4700 fputc ('\n', asm_out_file);
4701 }
4702 else
4703 {
4704 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
4705 if (flag_verbose_asm)
4706 {
4707 fprintf (asm_out_file,
4708 "\t%s advance to line %d",
4709 ASM_COMMENT_START, current_line);
4710 }
4711 fputc ('\n', asm_out_file);
4712 output_sleb128 (line_offset);
4713 fputc ('\n', asm_out_file);
4714 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
4715 fputc ('\n', asm_out_file);
4716 }
4717 }
4718 ++lt_index;
4719 strcpy (prev_line_label, line_label);
4720
4721 /* If we're done with a function, end its sequence. */
4722 if (lt_index == separate_line_info_table_in_use
4723 || separate_line_info_table[lt_index].function != function)
4724 {
4725 current_file = 1;
4726 current_line = 1;
4727 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
4728 if (flag_verbose_asm)
4729 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
4730 ASM_COMMENT_START);
4731 fputc ('\n', asm_out_file);
5c90448c 4732 ASM_GENERATE_INTERNAL_LABEL (line_label, FUNC_END_LABEL, function);
e90b62db
JM		 4733 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label, prev_line_label);
4734 fputc ('\n', asm_out_file);
4735
4736 /* Output the marker for the end of this sequence. */
4737 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
4738 if (flag_verbose_asm)
4739 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence",
4740 ASM_COMMENT_START);
4741 fputc ('\n', asm_out_file);
4742 output_uleb128 (1);
4743 fputc ('\n', asm_out_file);
4744 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
4745 fputc ('\n', asm_out_file);
4746 }
4747 }
a3f97cbb
JW		 4748}
4749\f
4750/**************** attribute support utilities ********************************/
4751
4752/*
4753 * Given a pointer to a BLOCK node return non-zero if (and only if) the node
4754 * in question represents the outermost pair of curly braces (i.e. the "body
4755 * block") of a function or method.
4756 *
4757 * For any BLOCK node representing a "body block" of a function or method, the
4758 * BLOCK_SUPERCONTEXT of the node will point to another BLOCK node which
4759 * represents the outermost (function) scope for the function or method (i.e.
4760 * the one which includes the formal parameters). The BLOCK_SUPERCONTEXT of
4761 * *that* node in turn will point to the relevant FUNCTION_DECL node.
4762 */
4763inline int
4764is_body_block (stmt)
4765 register tree stmt;
4766{
4767 if (TREE_CODE (stmt) == BLOCK)
4768 {
4769 register tree parent = BLOCK_SUPERCONTEXT (stmt);
4770
4771 if (TREE_CODE (parent) == BLOCK)
4772 {
4773 register tree grandparent = BLOCK_SUPERCONTEXT (parent);
4774
4775 if (TREE_CODE (grandparent) == FUNCTION_DECL)
4776 return 1;
4777 }
4778 }
4779 return 0;
4780}
4781
a3f97cbb
JW		 4782/* Given a pointer to a tree node for some base type, return a pointer to
4783 a DIE that describes the given type.
4784
4785 This routine must only be called for GCC type nodes that correspond to
4786 Dwarf base (fundamental) types. */
4787static dw_die_ref
4788base_type_die (type)
4789 register tree type;
4790{
a9d38797
JM		 4791 register dw_die_ref base_type_result;
4792 register char *type_name;
4793 register enum dwarf_type encoding;
a3f97cbb 4794
a9d38797
JM		 4795 if (TREE_CODE (type) == ERROR_MARK
4796 || TREE_CODE (type) == VOID_TYPE)
a3f97cbb
JW		 4797 return 0;
4798
a9d38797
JM		 4799 {
4800 register tree name = TYPE_NAME (type);
4801 if (TREE_CODE (name) == TYPE_DECL)
4802 name = DECL_NAME (name);
4803 type_name = IDENTIFIER_POINTER (name);
4804 }
4805
a3f97cbb
JW		 4806 switch (TREE_CODE (type))
4807 {
a3f97cbb 4808 case INTEGER_TYPE:
a9d38797 4809 /* Carefully distinguish the C character types, without messing
a3f97cbb
JW		 4810 up if the language is not C. Note that we check only for the names
4811 that contain spaces; other names might occur by coincidence in other
4812 languages. */
a9d38797
JM		 4813 if (! (TYPE_PRECISION (type) == CHAR_TYPE_SIZE
4814 && (type == char_type_node
4815 || ! strcmp (type_name, "signed char")
4816 || ! strcmp (type_name, "unsigned char"))))
a3f97cbb 4817 {
a9d38797
JM		 4818 if (TREE_UNSIGNED (type))
4819 encoding = DW_ATE_unsigned;
4820 else
4821 encoding = DW_ATE_signed;
4822 break;
a3f97cbb 4823 }
a9d38797 4824 /* else fall through */
a3f97cbb 4825
a9d38797
JM		 4826 case CHAR_TYPE:
4827 /* GNU Pascal/Ada CHAR type. Not used in C. */
4828 if (TREE_UNSIGNED (type))
4829 encoding = DW_ATE_unsigned_char;
4830 else
4831 encoding = DW_ATE_signed_char;
a3f97cbb
JW		 4832 break;
4833
4834 case REAL_TYPE:
a9d38797 4835 encoding = DW_ATE_float;
a3f97cbb
JW		 4836 break;
4837
4838 case COMPLEX_TYPE:
a9d38797 4839 encoding = DW_ATE_complex_float;
a3f97cbb
JW		 4840 break;
4841
4842 case BOOLEAN_TYPE:
a9d38797
JM		 4843 /* GNU FORTRAN/Ada/C++ BOOLEAN type. */
4844 encoding = DW_ATE_boolean;
a3f97cbb
JW		 4845 break;
4846
4847 default:
a9d38797 4848 abort (); /* No other TREE_CODEs are Dwarf fundamental types. */
a3f97cbb
JW		 4849 }
4850
a9d38797
JM		 4851 base_type_result = new_die (DW_TAG_base_type, comp_unit_die);
4852 add_AT_string (base_type_result, DW_AT_name, type_name);
4853 add_AT_unsigned (base_type_result, DW_AT_byte_size,
4854 TYPE_PRECISION (type) / BITS_PER_UNIT);
4855 add_AT_unsigned (base_type_result, DW_AT_encoding, encoding);
a3f97cbb
JW		 4856
4857 return base_type_result;
4858}
4859
4860/* Given a pointer to an arbitrary ..._TYPE tree node, return a pointer to
4861 the Dwarf "root" type for the given input type. The Dwarf "root" type of
4862 a given type is generally the same as the given type, except that if the
4863 given type is a pointer or reference type, then the root type of the given
4864 type is the root type of the "basis" type for the pointer or reference
4865 type. (This definition of the "root" type is recursive.) Also, the root
4866 type of a `const' qualified type or a `volatile' qualified type is the
4867 root type of the given type without the qualifiers. */
4868static tree
4869root_type (type)
4870 register tree type;
4871{
4872 if (TREE_CODE (type) == ERROR_MARK)
4873 return error_mark_node;
4874
4875 switch (TREE_CODE (type))
4876 {
4877 case ERROR_MARK:
4878 return error_mark_node;
4879
4880 case POINTER_TYPE:
4881 case REFERENCE_TYPE:
4882 return type_main_variant (root_type (TREE_TYPE (type)));
4883
4884 default:
4885 return type_main_variant (type);
4886 }
4887}
4888
4889/* Given a pointer to an arbitrary ..._TYPE tree node, return non-zero if the
4890 given input type is a Dwarf "fundamental" type. Otherwise return null. */
4891inline int
4892is_base_type (type)
4893 register tree type;
4894{
4895 switch (TREE_CODE (type))
4896 {
4897 case ERROR_MARK:
4898 case VOID_TYPE:
4899 case INTEGER_TYPE:
4900 case REAL_TYPE:
4901 case COMPLEX_TYPE:
4902 case BOOLEAN_TYPE:
4903 case CHAR_TYPE:
4904 return 1;
4905
4906 case SET_TYPE:
4907 case ARRAY_TYPE:
4908 case RECORD_TYPE:
4909 case UNION_TYPE:
4910 case QUAL_UNION_TYPE:
4911 case ENUMERAL_TYPE:
4912 case FUNCTION_TYPE:
4913 case METHOD_TYPE:
4914 case POINTER_TYPE:
4915 case REFERENCE_TYPE:
4916 case FILE_TYPE:
4917 case OFFSET_TYPE:
4918 case LANG_TYPE:
4919 return 0;
4920
4921 default:
4922 abort ();
4923 }
4924 return 0;
4925}
4926
4927/* Given a pointer to an arbitrary ..._TYPE tree node, return a debugging
4928 entry that chains various modifiers in front of the given type. */
4929static dw_die_ref
4930modified_type_die (type, is_const_type, is_volatile_type, context_die)
4931 register tree type;
4932 register int is_const_type;
4933 register int is_volatile_type;
4934 register dw_die_ref context_die;
4935{
4936 register enum tree_code code = TREE_CODE (type);
4937 register dw_die_ref mod_type_die = NULL;
4938 register dw_die_ref sub_die = NULL;
4939 register tree item_type;
4940
4941 if (code != ERROR_MARK)
4942 {
a94dbf2c 4943 type = build_type_variant (type, is_const_type, is_volatile_type);
bdb669cb
JM		 4944
4945 mod_type_die = lookup_type_die (type);
4946 if (mod_type_die)
4947 return mod_type_die;
4948
a94dbf2c
JM		 4949 /* Handle C typedef types. */
4950 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
4951 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
4952 {
4953 tree dtype = TREE_TYPE (TYPE_NAME (type));
4954 if (type == dtype)
4955 {
4956 /* For a named type, use the typedef. */
4957 gen_type_die (type, context_die);
4958 mod_type_die = lookup_type_die (type);
4959 }
4960 else if (is_const_type < TYPE_READONLY (dtype)
4961 || is_volatile_type < TYPE_VOLATILE (dtype))
4962 /* cv-unqualified version of named type. Just use the unnamed
4963 type to which it refers. */
4964 mod_type_die = modified_type_die
4965 (DECL_ORIGINAL_TYPE (TYPE_NAME (type)),
4966 is_const_type, is_volatile_type);
4967 /* else cv-qualified version of named type; fall through. */
4968 }
4969
4970 if (mod_type_die)
4971 /* OK */;
4972 else if (is_const_type)
a3f97cbb 4973 {
ab72d377 4974 mod_type_die = new_die (DW_TAG_const_type, comp_unit_die);
a9d38797 4975 sub_die = modified_type_die (type, 0, is_volatile_type, context_die);
a3f97cbb
JW		 4976 }
4977 else if (is_volatile_type)
4978 {
ab72d377 4979 mod_type_die = new_die (DW_TAG_volatile_type, comp_unit_die);
a9d38797 4980 sub_die = modified_type_die (type, 0, 0, context_die);
a3f97cbb
JW		 4981 }
4982 else if (code == POINTER_TYPE)
4983 {
ab72d377 4984 mod_type_die = new_die (DW_TAG_pointer_type, comp_unit_die);
a3f97cbb 4985 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
61b32c02 4986#if 0
a3f97cbb 4987 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
61b32c02 4988#endif
a3f97cbb
JW		 4989 item_type = TREE_TYPE (type);
4990 sub_die = modified_type_die (item_type,
4991 TYPE_READONLY (item_type),
4992 TYPE_VOLATILE (item_type),
4993 context_die);
4994 }
4995 else if (code == REFERENCE_TYPE)
4996 {
ab72d377 4997 mod_type_die = new_die (DW_TAG_reference_type, comp_unit_die);
a3f97cbb 4998 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
61b32c02 4999#if 0
a3f97cbb 5000 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
61b32c02 5001#endif
a3f97cbb
JW		 5002 item_type = TREE_TYPE (type);
5003 sub_die = modified_type_die (item_type,
5004 TYPE_READONLY (item_type),
5005 TYPE_VOLATILE (item_type),
5006 context_die);
5007 }
5008 else if (is_base_type (type))
5009 {
5010 mod_type_die = base_type_die (type);
5011 }
5012 else
5013 {
4b674448
JM		 5014 gen_type_die (type, context_die);
5015
a3f97cbb
JW		 5016 /* We have to get the type_main_variant here (and pass that to the
5017 `lookup_type_die' routine) because the ..._TYPE node we have
5018 might simply be a *copy* of some original type node (where the
5019 copy was created to help us keep track of typedef names) and
5020 that copy might have a different TYPE_UID from the original
a94dbf2c 5021 ..._TYPE node. */
a3f97cbb 5022 mod_type_die = lookup_type_die (type_main_variant (type));
a94dbf2c 5023 assert (mod_type_die != NULL);
a3f97cbb
JW		 5024 }
5025 }
5026 if (sub_die != NULL)
5027 {
5028 add_AT_die_ref (mod_type_die, DW_AT_type, sub_die);
5029 }
bdb669cb 5030 equate_type_number_to_die (type, mod_type_die);
a3f97cbb
JW		 5031 return mod_type_die;
5032}
5033
a3f97cbb
JW		 5034/* Given a pointer to an arbitrary ..._TYPE tree node, return true if it is
5035 an enumerated type. */
5036inline int
5037type_is_enum (type)
5038 register tree type;
5039{
5040 return TREE_CODE (type) == ENUMERAL_TYPE;
5041}
5042
5043/* Return the register number described by a given RTL node. */
5044static unsigned
5045reg_number (rtl)
5046 register rtx rtl;
5047{
5048 register unsigned regno = REGNO (rtl);
5049
5050 if (regno >= FIRST_PSEUDO_REGISTER)
5051 {
5052 warning_with_decl (dwarf_last_decl, "internal regno botch: regno = %d\n",
5053 regno);
5054 regno = 0;
5055 }
5056 regno = DBX_REGISTER_NUMBER (regno);
5057 return regno;
5058}
5059
5060/* Return a location descriptor that designates a machine register. */
5061static dw_loc_descr_ref
5062reg_loc_descriptor (rtl)
5063 register rtx rtl;
5064{
5065 register dw_loc_descr_ref loc_result = NULL;
5066 register unsigned reg = reg_number (rtl);
5067 if (reg >= 0 && reg <= 31)
5068 {
5069 loc_result = new_loc_descr (DW_OP_reg0 + reg, 0);
5070 }
5071 else
5072 {
5073 loc_result = new_loc_descr (DW_OP_regx, reg, 0);
5074 }
5075 return loc_result;
5076}
5077
5078/* Return a location descriptor that designates a base+offset location. */
5079static dw_loc_descr_ref
5080based_loc_descr (reg, offset)
5081 unsigned reg;
5082 long int offset;
5083{
5084 register dw_loc_descr_ref loc_result;
810429b7
JM		 5085 /* For the "frame base", we use the frame pointer or stack pointer
5086 registers, since the RTL for local variables is relative to one of
5087 them. */
5088 register unsigned fp_reg = DBX_REGISTER_NUMBER (frame_pointer_needed
5089 ? FRAME_POINTER_REGNUM
5090 : STACK_POINTER_REGNUM);
a3f97cbb
JW		 5091 if (reg == fp_reg)
5092 {
810429b7 5093 loc_result = new_loc_descr (DW_OP_fbreg, offset, 0);
a3f97cbb
JW		 5094 }
5095 else if (reg >= 0 && reg <= 31)
5096 {
5097 loc_result = new_loc_descr (DW_OP_breg0 + reg, offset);
5098 }
5099 else
5100 {
5101 loc_result = new_loc_descr (DW_OP_bregx, reg, offset);
5102 }
5103 return loc_result;
5104}
5105
5106/* Return true if this RTL expression describes a base+offset calculation. */
5107inline int
5108is_based_loc (rtl)
5109 register rtx rtl;
5110{
5111 return GET_CODE (rtl) == PLUS
5112 && ((GET_CODE (XEXP (rtl, 0)) == REG
5113 && GET_CODE (XEXP (rtl, 1)) == CONST_INT));
5114}
5115
5116/* The following routine converts the RTL for a variable or parameter
5117 (resident in memory) into an equivalent Dwarf representation of a
5118 mechanism for getting the address of that same variable onto the top of a
5119 hypothetical "address evaluation" stack.
5120 When creating memory location descriptors, we are effectively transforming
5121 the RTL for a memory-resident object into its Dwarf postfix expression
5122 equivalent. This routine recursively descends an RTL tree, turning
5123 it into Dwarf postfix code as it goes. */
5124static dw_loc_descr_ref
5125mem_loc_descriptor (rtl)
5126 register rtx rtl;
5127{
5128 dw_loc_descr_ref mem_loc_result = NULL;
5129 /* Note that for a dynamically sized array, the location we will generate a
5130 description of here will be the lowest numbered location which is
5131 actually within the array. That's *not* necessarily the same as the
5132 zeroth element of the array. */
5133 switch (GET_CODE (rtl))
5134 {
5135 case SUBREG:
5136 /* The case of a subreg may arise when we have a local (register)
5137 variable or a formal (register) parameter which doesn't quite fill
5138 up an entire register. For now, just assume that it is
5139 legitimate to make the Dwarf info refer to the whole register which
5140 contains the given subreg. */
5141 rtl = XEXP (rtl, 0);
5142 /* Drop thru. */
5143
5144 case REG:
5145 /* Whenever a register number forms a part of the description of the
5146 method for calculating the (dynamic) address of a memory resident
5147 object, DWARF rules require the register number be referred to as
5148 a "base register". This distinction is not based in any way upon
5149 what category of register the hardware believes the given register
5150 belongs to. This is strictly DWARF terminology we're dealing with
5151 here. Note that in cases where the location of a memory-resident
5152 data object could be expressed as: OP_ADD (OP_BASEREG (basereg),
5153 OP_CONST (0)) the actual DWARF location descriptor that we generate
5154 may just be OP_BASEREG (basereg). This may look deceptively like
5155 the object in question was allocated to a register (rather than in
5156 memory) so DWARF consumers need to be aware of the subtle
5157 distinction between OP_REG and OP_BASEREG. */
5158 mem_loc_result = based_loc_descr (reg_number (rtl), 0);
5159 break;
5160
5161 case MEM:
5162 mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0));
5163 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_deref, 0, 0));
5164 break;
5165
5166 case CONST:
5167 case SYMBOL_REF:
5168 mem_loc_result = new_loc_descr (DW_OP_addr, 0, 0);
5169 mem_loc_result->dw_loc_oprnd1.val_class = dw_val_class_addr;
5170 mem_loc_result->dw_loc_oprnd1.v.val_addr = addr_to_string (rtl);
5171 break;
5172
5173 case PLUS:
5174 if (is_based_loc (rtl))
5175 {
5176 mem_loc_result = based_loc_descr (
5177 reg_number (XEXP (rtl, 0)),
5178 INTVAL (XEXP (rtl, 1)));
5179 }
5180 else
5181 {
5182 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0)));
5183 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1)));
5184 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_plus, 0, 0));
5185 }
5186 break;
5187
dd2478ae
JW		 5188 case MULT:
5189 /* If a pseudo-reg is optimized away, it is possible for it to
5190 be replaced with a MEM containing a multiply. */
5191 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0)));
5192 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1)));
5193 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_mul, 0, 0));
5194 break;
5195
a3f97cbb
JW		 5196 case CONST_INT:
5197 mem_loc_result = new_loc_descr (DW_OP_constu, INTVAL (rtl), 0);
5198 break;
5199
5200 default:
5201 abort ();
5202 }
5203 return mem_loc_result;
5204}
5205
5206/* Output a proper Dwarf location descriptor for a variable or parameter
5207 which is either allocated in a register or in a memory location. For a
5208 register, we just generate an OP_REG and the register number. For a
5209 memory location we provide a Dwarf postfix expression describing how to
5210 generate the (dynamic) address of the object onto the address stack. */
5211static dw_loc_descr_ref
5212loc_descriptor (rtl)
5213 register rtx rtl;
5214{
5215 dw_loc_descr_ref loc_result = NULL;
5216 switch (GET_CODE (rtl))
5217 {
5218 case SUBREG:
5219
5220 /* The case of a subreg may arise when we have a local (register)
5221 variable or a formal (register) parameter which doesn't quite fill
5222 up an entire register. For now, just assume that it is
5223 legitimate to make the Dwarf info refer to the whole register which
5224 contains the given subreg. */
5225
5226 rtl = XEXP (rtl, 0);
5c90448c 5227 /* fall through */
a3f97cbb
JW		 5228
5229 case REG:
5c90448c 5230 loc_result = reg_loc_descriptor (rtl);
a3f97cbb
JW		 5231 break;
5232
5233 case MEM:
5234 loc_result = mem_loc_descriptor (XEXP (rtl, 0));
5235 break;
5236
5237 default:
5238 abort (); /* Should never happen */
5239 }
5240 return loc_result;
5241}
5242
5243/* Given an unsigned value, round it up to the lowest multiple of `boundary'
5244 which is not less than the value itself. */
5245inline unsigned
5246ceiling (value, boundary)
5247 register unsigned value;
5248 register unsigned boundary;
5249{
5250 return (((value + boundary - 1) / boundary) * boundary);
5251}
5252
5253/* Given a pointer to what is assumed to be a FIELD_DECL node, return a
5254 pointer to the declared type for the relevant field variable, or return
5255 `integer_type_node' if the given node turns out to be an
5256 ERROR_MARK node. */
5257inline tree
5258field_type (decl)
5259 register tree decl;
5260{
5261 register tree type;
5262
5263 if (TREE_CODE (decl) == ERROR_MARK)
5264 return integer_type_node;
5265
5266 type = DECL_BIT_FIELD_TYPE (decl);
5267 if (type == NULL)
5268 type = TREE_TYPE (decl);
5269
5270 return type;
5271}
5272
5273/* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
5274 node, return the alignment in bits for the type, or else return
5275 BITS_PER_WORD if the node actually turns out to be an
5276 ERROR_MARK node. */
5277inline unsigned
5278simple_type_align_in_bits (type)
5279 register tree type;
5280{
5281 return (TREE_CODE (type) != ERROR_MARK) ? TYPE_ALIGN (type) : BITS_PER_WORD;
5282}
5283
5284/* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
5285 node, return the size in bits for the type if it is a constant, or else
5286 return the alignment for the type if the type's size is not constant, or
5287 else return BITS_PER_WORD if the type actually turns out to be an
5288 ERROR_MARK node. */
5289inline unsigned
5290simple_type_size_in_bits (type)
5291 register tree type;
5292{
5293 if (TREE_CODE (type) == ERROR_MARK)
5294 return BITS_PER_WORD;
5295 else
5296 {
5297 register tree type_size_tree = TYPE_SIZE (type);
5298
5299 if (TREE_CODE (type_size_tree) != INTEGER_CST)
5300 return TYPE_ALIGN (type);
5301
5302 return (unsigned) TREE_INT_CST_LOW (type_size_tree);
5303 }
5304}
5305
5306/* Given a pointer to what is assumed to be a FIELD_DECL node, compute and
5307 return the byte offset of the lowest addressed byte of the "containing
5308 object" for the given FIELD_DECL, or return 0 if we are unable to
5309 determine what that offset is, either because the argument turns out to
5310 be a pointer to an ERROR_MARK node, or because the offset is actually
5311 variable. (We can't handle the latter case just yet). */
5312static unsigned
5313field_byte_offset (decl)
5314 register tree decl;
5315{
5316 register unsigned type_align_in_bytes;
5317 register unsigned type_align_in_bits;
5318 register unsigned type_size_in_bits;
5319 register unsigned object_offset_in_align_units;
5320 register unsigned object_offset_in_bits;
5321 register unsigned object_offset_in_bytes;
5322 register tree type;
5323 register tree bitpos_tree;
5324 register tree field_size_tree;
5325 register unsigned bitpos_int;
5326 register unsigned deepest_bitpos;
5327 register unsigned field_size_in_bits;
5328
5329 if (TREE_CODE (decl) == ERROR_MARK)
5330 return 0;
5331
5332 if (TREE_CODE (decl) != FIELD_DECL)
5333 abort ();
5334
5335 type = field_type (decl);
5336
5337 bitpos_tree = DECL_FIELD_BITPOS (decl);
5338 field_size_tree = DECL_SIZE (decl);
5339
5340 /* We cannot yet cope with fields whose positions or sizes are variable, so
5341 for now, when we see such things, we simply return 0. Someday, we may
5342 be able to handle such cases, but it will be damn difficult. */
5343 if (TREE_CODE (bitpos_tree) != INTEGER_CST)
5344 return 0;
5345 bitpos_int = (unsigned) TREE_INT_CST_LOW (bitpos_tree);
5346
5347 if (TREE_CODE (field_size_tree) != INTEGER_CST)
5348 return 0;
5349 field_size_in_bits = (unsigned) TREE_INT_CST_LOW (field_size_tree);
5350
5351 type_size_in_bits = simple_type_size_in_bits (type);
5352
5353 type_align_in_bits = simple_type_align_in_bits (type);
5354 type_align_in_bytes = type_align_in_bits / BITS_PER_UNIT;
5355
5356 /* Note that the GCC front-end doesn't make any attempt to keep track of
5357 the starting bit offset (relative to the start of the containing
5358 structure type) of the hypothetical "containing object" for a bit-
5359 field. Thus, when computing the byte offset value for the start of the
5360 "containing object" of a bit-field, we must deduce this information on
5361 our own. This can be rather tricky to do in some cases. For example,
5362 handling the following structure type definition when compiling for an
5363 i386/i486 target (which only aligns long long's to 32-bit boundaries)
5364 can be very tricky:
5365
5366 struct S { int field1; long long field2:31; };
5367
5368 Fortunately, there is a simple rule-of-thumb which can be
5369 used in such cases. When compiling for an i386/i486, GCC will allocate
5370 8 bytes for the structure shown above. It decides to do this based upon
5371 one simple rule for bit-field allocation. Quite simply, GCC allocates
5372 each "containing object" for each bit-field at the first (i.e. lowest
5373 addressed) legitimate alignment boundary (based upon the required
5374 minimum alignment for the declared type of the field) which it can
5375 possibly use, subject to the condition that there is still enough
5376 available space remaining in the containing object (when allocated at
5377 the selected point) to fully accommodate all of the bits of the
5378 bit-field itself. This simple rule makes it obvious why GCC allocates
5379 8 bytes for each object of the structure type shown above. When looking
5380 for a place to allocate the "containing object" for `field2', the
5381 compiler simply tries to allocate a 64-bit "containing object" at each
5382 successive 32-bit boundary (starting at zero) until it finds a place to
5383 allocate that 64- bit field such that at least 31 contiguous (and
5384 previously unallocated) bits remain within that selected 64 bit field.
5385 (As it turns out, for the example above, the compiler finds that it is
5386 OK to allocate the "containing object" 64-bit field at bit-offset zero
5387 within the structure type.) Here we attempt to work backwards from the
5388 limited set of facts we're given, and we try to deduce from those facts,
5389 where GCC must have believed that the containing object started (within
5390 the structure type). The value we deduce is then used (by the callers of
5391 this routine) to generate DW_AT_location and DW_AT_bit_offset attributes
5392 for fields (both bit-fields and, in the case of DW_AT_location, regular
5393 fields as well). */
5394
5395 /* Figure out the bit-distance from the start of the structure to the
5396 "deepest" bit of the bit-field. */
5397 deepest_bitpos = bitpos_int + field_size_in_bits;
5398
5399 /* This is the tricky part. Use some fancy footwork to deduce where the
5400 lowest addressed bit of the containing object must be. */
5401 object_offset_in_bits
5402 = ceiling (deepest_bitpos, type_align_in_bits) - type_size_in_bits;
5403
5404 /* Compute the offset of the containing object in "alignment units". */
5405 object_offset_in_align_units = object_offset_in_bits / type_align_in_bits;
5406
5407 /* Compute the offset of the containing object in bytes. */
5408 object_offset_in_bytes = object_offset_in_align_units * type_align_in_bytes;
5409
5410 return object_offset_in_bytes;
5411}
5412
5413
5414\f
5415/****************************** attributes *********************************/
5416
5417/* The following routines define various Dwarf attributes
5418 (and any data associated with them). */
5419
5420
5421/* Output the form of location attributes suitable for whole variables and
5422 whole parameters. Note that the location attributes for struct fields are
5423 generated by the routine `data_member_location_attribute' below. */
5424static void
5425add_location_attribute (die, rtl)
5426 dw_die_ref die;
5427 register rtx rtl;
5428{
5429 dw_loc_descr_ref loc_descr = NULL;
5430
5431 /* Handle a special case. If we are about to output a location descriptor
5432 for a variable or parameter which has been optimized out of existence,
5433 don't do that. Instead we output a null location descriptor value as
5434 part of the location attribute. A variable which has been optimized out
5435 of existence will have a DECL_RTL value which denotes a pseudo-reg.
5436 Currently, in some rare cases, variables can have DECL_RTL values which
5437 look like (MEM (REG pseudo-reg#)). These cases are due to bugs
5438 elsewhere in the compiler. We treat such cases as if the variable(s) in
5439 question had been optimized out of existence. Note that in all cases
5440 where we wish to express the fact that a variable has been optimized out
5441 of existence, we do not simply suppress the generation of the entire
5442 location attribute because the absence of a location attribute in
5443 certain kinds of DIEs is used to indicate something else entirely...
5444 i.e. that the DIE represents an object declaration, but not a
5445 definition. So sayeth the PLSIG. */
5446 if (!is_pseudo_reg (rtl)
5447 && (GET_CODE (rtl) != MEM
5448 || !is_pseudo_reg (XEXP (rtl, 0))))
5449 {
5450 loc_descr = loc_descriptor (eliminate_regs (rtl, 0, NULL_RTX));
5451 }
5452
5453#ifdef MIPS_DEBUGGING_INFO
5454 /* ??? SGI's dwarf reader is buggy, and will not accept a zero size
5455 location descriptor. Lets just use r0 for now to represent a
5456 variable that has been optimized away. */
5457 if (loc_descr == NULL)
5458 {
5459 loc_descr = loc_descriptor (gen_rtx (REG, word_mode, 0));
5460 }
5461#endif
5462
5463 add_AT_loc (die, DW_AT_location, loc_descr);
5464}
5465
5466/* Attach the specialized form of location attribute used for data
5467 members of struct and union types. In the special case of a
5468 FIELD_DECL node which represents a bit-field, the "offset" part
5469 of this special location descriptor must indicate the distance
5470 in bytes from the lowest-addressed byte of the containing struct
5471 or union type to the lowest-addressed byte of the "containing
5472 object" for the bit-field. (See the `field_byte_offset' function
5473 above).. For any given bit-field, the "containing object" is a
5474 hypothetical object (of some integral or enum type) within which
5475 the given bit-field lives. The type of this hypothetical
5476 "containing object" is always the same as the declared type of
5477 the individual bit-field itself (for GCC anyway... the DWARF
5478 spec doesn't actually mandate this). Note that it is the size
5479 (in bytes) of the hypothetical "containing object" which will
5480 be given in the DW_AT_byte_size attribute for this bit-field.
5481 (See the `byte_size_attribute' function below.) It is also used
5482 when calculating the value of the DW_AT_bit_offset attribute.
5483 (See the `bit_offset_attribute' function below). */
5484static void
5485add_data_member_location_attribute (die, decl)
5486 register dw_die_ref die;
5487 register tree decl;
5488{
61b32c02 5489 register unsigned long offset;
a3f97cbb
JW		 5490 register dw_loc_descr_ref loc_descr;
5491 register enum dwarf_location_atom op;
5492
61b32c02
JM		 5493 if (TREE_CODE (decl) == TREE_VEC)
5494 offset = TREE_INT_CST_LOW (BINFO_OFFSET (decl));
5495 else
5496 offset = field_byte_offset (decl);
5497
a3f97cbb
JW		 5498 /* The DWARF2 standard says that we should assume that the structure address
5499 is already on the stack, so we can specify a structure field address
5500 by using DW_OP_plus_uconst. */
5501#ifdef MIPS_DEBUGGING_INFO
5502 /* ??? The SGI dwarf reader does not handle the DW_OP_plus_uconst operator
5503 correctly. It works only if we leave the offset on the stack. */
5504 op = DW_OP_constu;
5505#else
5506 op = DW_OP_plus_uconst;
5507#endif
5508 loc_descr = new_loc_descr (op, offset, 0);
5509 add_AT_loc (die, DW_AT_data_member_location, loc_descr);
5510}
5511
5512/* Attach an DW_AT_const_value attribute for a variable or a parameter which
5513 does not have a "location" either in memory or in a register. These
5514 things can arise in GNU C when a constant is passed as an actual parameter
5515 to an inlined function. They can also arise in C++ where declared
5516 constants do not necessarily get memory "homes". */
5517static void
5518add_const_value_attribute (die, rtl)
5519 register dw_die_ref die;
5520 register rtx rtl;
5521{
5522 switch (GET_CODE (rtl))
5523 {
5524 case CONST_INT:
5525 /* Note that a CONST_INT rtx could represent either an integer or a
5526 floating-point constant. A CONST_INT is used whenever the constant
5527 will fit into a single word. In all such cases, the original mode
5528 of the constant value is wiped out, and the CONST_INT rtx is
5529 assigned VOIDmode. */
5530 add_AT_unsigned (die, DW_AT_const_value, (unsigned) INTVAL (rtl));
5531 break;
5532
5533 case CONST_DOUBLE:
5534 /* Note that a CONST_DOUBLE rtx could represent either an integer or a
5535 floating-point constant. A CONST_DOUBLE is used whenever the
5536 constant requires more than one word in order to be adequately
5537 represented. In all such cases, the original mode of the constant
5538 value is preserved as the mode of the CONST_DOUBLE rtx, but for
5539 simplicity we always just output CONST_DOUBLEs using 8 bytes. */
5540 add_AT_double (die, DW_AT_const_value,
5541 (unsigned) CONST_DOUBLE_HIGH (rtl),
5542 (unsigned) CONST_DOUBLE_LOW (rtl));
5543 break;
5544
5545 case CONST_STRING:
5546 add_AT_string (die, DW_AT_const_value, XSTR (rtl, 0));
5547 break;
5548
5549 case SYMBOL_REF:
5550 case LABEL_REF:
5551 case CONST:
5552 add_AT_addr (die, DW_AT_const_value, addr_to_string (rtl));
5553 break;
5554
5555 case PLUS:
5556 /* In cases where an inlined instance of an inline function is passed
5557 the address of an `auto' variable (which is local to the caller) we
5558 can get a situation where the DECL_RTL of the artificial local
5559 variable (for the inlining) which acts as a stand-in for the
5560 corresponding formal parameter (of the inline function) will look
5561 like (plus:SI (reg:SI FRAME_PTR) (const_int ...)). This is not
5562 exactly a compile-time constant expression, but it isn't the address
5563 of the (artificial) local variable either. Rather, it represents the
5564 *value* which the artificial local variable always has during its
5565 lifetime. We currently have no way to represent such quasi-constant
5566 values in Dwarf, so for now we just punt and generate an
5567 DW_AT_const_value attribute with null address. */
5568 add_AT_addr (die, DW_AT_const_value, addr_to_string (const0_rtx));
5569 break;
5570
5571 default:
5572 /* No other kinds of rtx should be possible here. */
5573 abort ();
5574 }
5575
5576}
5577
5578/* Generate *either* an DW_AT_location attribute or else an DW_AT_const_value
5579 data attribute for a variable or a parameter. We generate the
5580 DW_AT_const_value attribute only in those cases where the given variable
5581 or parameter does not have a true "location" either in memory or in a
5582 register. This can happen (for example) when a constant is passed as an
5583 actual argument in a call to an inline function. (It's possible that
5584 these things can crop up in other ways also.) Note that one type of
5585 constant value which can be passed into an inlined function is a constant
5586 pointer. This can happen for example if an actual argument in an inlined
5587 function call evaluates to a compile-time constant address. */
5588static void
5589add_location_or_const_value_attribute (die, decl)
5590 register dw_die_ref die;
5591 register tree decl;
5592{
5593 register rtx rtl;
5594 register tree declared_type;
5595 register tree passed_type;
5596
5597 if (TREE_CODE (decl) == ERROR_MARK)
5598 {
5599 return;
5600 }
5601 if ((TREE_CODE (decl) != VAR_DECL)
5602 && (TREE_CODE (decl) != PARM_DECL))
5603 {
5604 /* Should never happen. */
5605 abort ();
5606 return;
5607 }
5608 /* Here we have to decide where we are going to say the parameter "lives"
5609 (as far as the debugger is concerned). We only have a couple of
5610 choices. GCC provides us with DECL_RTL and with DECL_INCOMING_RTL.
5611 DECL_RTL normally indicates where the parameter lives during most of the
5612 activa- tion of the function. If optimization is enabled however, this
5613 could be either NULL or else a pseudo-reg. Both of those cases indicate
5614 that the parameter doesn't really live anywhere (as far as the code
5615 generation parts of GCC are concerned) during most of the function's
5616 activation. That will happen (for example) if the parameter is never
5617 referenced within the function. We could just generate a location
5618 descriptor here for all non-NULL non-pseudo values of DECL_RTL and
5619 ignore all of the rest, but we can be a little nicer than that if we
5620 also consider DECL_INCOMING_RTL in cases where DECL_RTL is NULL or is a
5621 pseudo-reg. Note however that we can only get away with using
5622 DECL_INCOMING_RTL as a backup substitute for DECL_RTL in certain limited
5623 cases. In cases where DECL_ARG_TYPE(decl) indicates the same type as
5624 TREE_TYPE(decl) we can be sure that the parameter was passed using the
5625 same type as it is declared to have within the function, and that its
5626 DECL_INCOMING_RTL points us to a place where a value of that type is
5627 passed. In cases where DECL_ARG_TYPE(decl) and TREE_TYPE(decl) are
5628 different types however, we cannot (in general) use DECL_INCOMING_RTL as
5629 a backup substitute for DECL_RTL because in these cases,
5630 DECL_INCOMING_RTL points us to a value of some type which is *different*
5631 from the type of the parameter itself. Thus, if we tried to use
5632 DECL_INCOMING_RTL to generate a location attribute in such cases, the
5633 debugger would end up (for example) trying to fetch a `float' from a
5634 place which actually contains the first part of a `double'. That would
5635 lead to really incorrect and confusing output at debug-time, and we
5636 don't want that now do we? So in general, we DO NOT use
5637 DECL_INCOMING_RTL as a backup for DECL_RTL in cases where
5638 DECL_ARG_TYPE(decl) != TREE_TYPE(decl). There are a couple of cute
5639 exceptions however. On little-endian machines we can get away with
5640 using DECL_INCOMING_RTL even when DECL_ARG_TYPE(decl) is not the same as
5641 TREE_TYPE(decl) but only when DECL_ARG_TYPE(decl) is an integral type
5642 which is smaller than TREE_TYPE(decl). These cases arise when (on a
5643 little-endian machine) a non-prototyped function has a parameter
5644 declared to be of type `short' or `char'. In such cases,
5645 TREE_TYPE(decl) will be `short' or `char', DECL_ARG_TYPE(decl) will be
5646 `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the
5647 passed `int' value. If the debugger then uses that address to fetch a
5648 `short' or a `char' (on a little-endian machine) the result will be the
5649 correct data, so we allow for such exceptional cases below. Note that
5650 our goal here is to describe the place where the given formal parameter
5651 lives during most of the function's activation (i.e. between the end of
5652 the prologue and the start of the epilogue). We'll do that as best as
5653 we can. Note however that if the given formal parameter is modified
5654 sometime during the execution of the function, then a stack backtrace
5655 (at debug-time) will show the function as having been called with the
5656 *new* value rather than the value which was originally passed in. This
5657 happens rarely enough that it is not a major problem, but it *is* a
9a666dda 5658 problem, and I'd like to fix it. A future version of dwarf2out.c may
a3f97cbb
JW		 5659 generate two additional attributes for any given DW_TAG_formal_parameter
5660 DIE which will describe the "passed type" and the "passed location" for
5661 the given formal parameter in addition to the attributes we now generate
5662 to indicate the "declared type" and the "active location" for each
5663 parameter. This additional set of attributes could be used by debuggers
5664 for stack backtraces. Separately, note that sometimes DECL_RTL can be
5665 NULL and DECL_INCOMING_RTL can be NULL also. This happens (for example)
5666 for inlined-instances of inline function formal parameters which are
5667 never referenced. This really shouldn't be happening. All PARM_DECL
5668 nodes should get valid non-NULL DECL_INCOMING_RTL values, but
5669 integrate.c doesn't currently generate these values for inlined
5670 instances of inline function parameters, so when we see such cases, we
5671 are just SOL (shit-out-of-luck) for the time being (until integrate.c
5672 gets fixed). */
5673
5674 /* Use DECL_RTL as the "location" unless we find something better. */
5675 rtl = DECL_RTL (decl);
5676
5677 if (TREE_CODE (decl) == PARM_DECL)
5678 {
5679 if (rtl == NULL_RTX || is_pseudo_reg (rtl))
5680 {
5681 declared_type = type_main_variant (TREE_TYPE (decl));
5682 passed_type = type_main_variant (DECL_ARG_TYPE (decl));
5683 /* This decl represents a formal parameter which was
5684 optimized out.
5685
5686 Note that DECL_INCOMING_RTL may be NULL in here, but we handle
5687 all* cases where (rtl == NULL_RTX) just below. */
5688 if (declared_type == passed_type)
5689 {
5690 rtl = DECL_INCOMING_RTL (decl);
5691 }
5692 else if (!BYTES_BIG_ENDIAN)
5693 {
5694 if (TREE_CODE (declared_type) == INTEGER_TYPE)
5695 {
5696 if (TYPE_SIZE (declared_type) <= TYPE_SIZE (passed_type))
5697 {
5698 rtl = DECL_INCOMING_RTL (decl);
5699 }
5700 }
5701 }
a3f97cbb
JW		 5702 }
5703 }
61b32c02
JM		 5704 if (rtl == NULL_RTX)
5705 return;
5706
a3f97cbb
JW		 5707 switch (GET_CODE (rtl))
5708 {
5709 case CONST_INT:
5710 case CONST_DOUBLE:
5711 case CONST_STRING:
5712 case SYMBOL_REF:
5713 case LABEL_REF:
5714 case CONST:
5715 case PLUS:
5716 /* DECL_RTL could be (plus (reg ...) (const_int ...)) */
5717 add_const_value_attribute (die, rtl);
5718 break;
5719
5720 case MEM:
5721 case REG:
5722 case SUBREG:
5723 add_location_attribute (die, rtl);
5724 break;
5725
5726 default:
5727 abort (); /* Should never happen. */
5728 }
5729}
5730
5731/* Generate an DW_AT_name attribute given some string value to be included as
5732 the value of the attribute. */
5733inline void
5734add_name_attribute (die, name_string)
5735 register dw_die_ref die;
5736 register char *name_string;
5737{
5738 if (name_string && *name_string)
5739 {
5740 add_AT_string (die, DW_AT_name, name_string);
5741 }
5742}
5743
5744/* Given a tree node describing an array bound (either lower or upper) output
a9d38797
JM		 5745 a representation for that bound.
5746
5747 FIXME: This uses location descriptions for variable bounds, whereas the
5748 DWARF-2 spec only allowes for constants or DIE references. */
a3f97cbb
JW		 5749static void
5750add_bound_info (subrange_die, bound_attr, bound)
5751 register dw_die_ref subrange_die;
5752 register enum dwarf_attribute bound_attr;
5753 register tree bound;
5754{
5755 register dw_loc_descr_ref bound_loc = NULL;
5756 register unsigned bound_value = 0;
5757 switch (TREE_CODE (bound))
5758 {
5759 case ERROR_MARK:
5760 return;
5761
5762 /* All fixed-bounds are represented by INTEGER_CST nodes. */
5763 case INTEGER_CST:
5764 bound_value = TREE_INT_CST_LOW (bound);
5765 /* TODO: we need to check for C language below, or some flag
5766 derived from the language. C implies a lower bound of 0. */
5767 if (!(bound_attr == DW_AT_lower_bound && bound_value == 0))
5768 {
5769 add_AT_unsigned (subrange_die, bound_attr, bound_value);
5770 }
5771 break;
5772
5773 /* Dynamic bounds may be represented by NOP_EXPR nodes containing
5774 SAVE_EXPR nodes. */
5775 case NOP_EXPR:
5776 bound = TREE_OPERAND (bound, 0);
5777 /* ... fall thru... */
5778
5779 case SAVE_EXPR:
5780 /* If optimization is turned on, the SAVE_EXPRs that describe how to
5781 access the upper bound values are essentially bogus. They only
5782 describe (at best) how to get at these values at the points in the
5783 generated code right after they have just been computed. Worse yet,
5784 in the typical case, the upper bound values will not even *be*
5785 computed in the optimized code, so these SAVE_EXPRs are entirely
5786 bogus. In order to compensate for this fact, we check here to see if
5787 optimization is enabled, and if so, we effectively create an empty
5788 location description for the (unknown and unknowable) upper bound.
5789 This should not cause too much trouble for existing (stupid?)
5790 debuggers because they have to deal with empty upper bounds location
5791 descriptions anyway in order to be able to deal with incomplete array
5792 types. Of course an intelligent debugger (GDB?) should be able to
5793 comprehend that a missing upper bound specification in a array type
5794 used for a storage class `auto' local array variable indicates that
5795 the upper bound is both unknown (at compile- time) and unknowable (at
5796 run-time) due to optimization. */
5797 if (!optimize)
5798 {
5799 bound_loc = mem_loc_descriptor (
5800 eliminate_regs (SAVE_EXPR_RTL (bound),
5801 0, NULL_RTX));
5802 }
5803 else
5804 {
5805 bound_loc = NULL;
5806 }
5807 add_AT_loc (subrange_die, bound_attr, bound_loc);
5808 break;
5809
5810 default:
5811 abort ();
5812 }
5813}
5814
5815/* Note that the block of subscript information for an array type also
5816 includes information about the element type of type given array type. */
5817static void
5818add_subscript_info (type_die, type)
5819 register dw_die_ref type_die;
5820 register tree type;
5821{
5822 register unsigned dimension_number;
5823 register tree lower, upper;
5824 register dw_die_ref subrange_die;
5825
5826 /* The GNU compilers represent multidimensional array types as sequences of
5827 one dimensional array types whose element types are themselves array
5828 types. Here we squish that down, so that each multidimensional array
5829 type gets only one array_type DIE in the Dwarf debugging info. The draft
5830 Dwarf specification say that we are allowed to do this kind of
5831 compression in C (because there is no difference between an array or
5832 arrays and a multidimensional array in C) but for other source languages
5833 (e.g. Ada) we probably shouldn't do this. */
5834 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
5835 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
5836 We work around this by disabling this feature. See also
5837 gen_array_type_die. */
5838#ifndef MIPS_DEBUGGING_INFO
5839 for (dimension_number = 0;
5840 TREE_CODE (type) == ARRAY_TYPE;
5841 type = TREE_TYPE (type), dimension_number++)
5842 {
5843#endif
5844 register tree domain = TYPE_DOMAIN (type);
5845
5846 /* Arrays come in three flavors: Unspecified bounds, fixed bounds,
5847 and (in GNU C only) variable bounds. Handle all three forms
5848 here. */
5849 subrange_die = new_die (DW_TAG_subrange_type, type_die);
5850 if (domain)
5851 {
5852 /* We have an array type with specified bounds. */
5853 lower = TYPE_MIN_VALUE (domain);
5854 upper = TYPE_MAX_VALUE (domain);
5855
a9d38797
JM		 5856 /* define the index type. */
5857 if (TREE_TYPE (domain))
5858 add_type_attribute (subrange_die, TREE_TYPE (domain), 0, 0,
5859 type_die);
5860
5861 if (! is_c_family () && ! is_fortran ())
5862 add_bound_info (subrange_die, DW_AT_lower_bound, lower);
a3f97cbb
JW		 5863 add_bound_info (subrange_die, DW_AT_upper_bound, upper);
5864 }
5865 else
5866 {
a9d38797
JM		 5867 /* We have an array type with an unspecified length. The DWARF-2
5868 spec does not say how to handle this; let's just leave out the
5869 bounds. */
a3f97cbb
JW		 5870 }
5871#ifndef MIPS_DEBUGGING_INFO
5872 }
5873#endif
5874}
5875
5876static void
5877add_byte_size_attribute (die, tree_node)
5878 dw_die_ref die;
5879 register tree tree_node;
5880{
5881 register unsigned size;
5882
5883 switch (TREE_CODE (tree_node))
5884 {
5885 case ERROR_MARK:
5886 size = 0;
5887 break;
5888 case ENUMERAL_TYPE:
5889 case RECORD_TYPE:
5890 case UNION_TYPE:
5891 case QUAL_UNION_TYPE:
5892 size = int_size_in_bytes (tree_node);
5893 break;
5894 case FIELD_DECL:
5895 /* For a data member of a struct or union, the DW_AT_byte_size is
5896 generally given as the number of bytes normally allocated for an
5897 object of the *declared* type of the member itself. This is true
5898 even for bit-fields. */
5899 size = simple_type_size_in_bits (field_type (tree_node)) / BITS_PER_UNIT;
5900 break;
5901 default:
5902 abort ();
5903 }
5904
5905 /* Note that `size' might be -1 when we get to this point. If it is, that
5906 indicates that the byte size of the entity in question is variable. We
5907 have no good way of expressing this fact in Dwarf at the present time,
5908 so just let the -1 pass on through. */
5909
5910 add_AT_unsigned (die, DW_AT_byte_size, size);
5911}
5912
5913/* For a FIELD_DECL node which represents a bit-field, output an attribute
5914 which specifies the distance in bits from the highest order bit of the
5915 "containing object" for the bit-field to the highest order bit of the
5916 bit-field itself.
5917
b2932ae5
JM		 5918 For any given bit-field, the "containing object" is a hypothetical
5919 object (of some integral or enum type) within which the given bit-field
5920 lives. The type of this hypothetical "containing object" is always the
5921 same as the declared type of the individual bit-field itself. The
5922 determination of the exact location of the "containing object" for a
5923 bit-field is rather complicated. It's handled by the
5924 `field_byte_offset' function (above).
a3f97cbb
JW		 5925
5926 Note that it is the size (in bytes) of the hypothetical "containing object"
5927 which will be given in the DW_AT_byte_size attribute for this bit-field.
5928 (See `byte_size_attribute' above). */
5929inline void
5930add_bit_offset_attribute (die, decl)
5931 register dw_die_ref die;
5932 register tree decl;
5933{
5934 register unsigned object_offset_in_bytes = field_byte_offset (decl);
5935 register tree type = DECL_BIT_FIELD_TYPE (decl);
5936 register tree bitpos_tree = DECL_FIELD_BITPOS (decl);
5937 register unsigned bitpos_int;
5938 register unsigned highest_order_object_bit_offset;
5939 register unsigned highest_order_field_bit_offset;
5940 register unsigned bit_offset;
5941
5942 assert (TREE_CODE (decl) == FIELD_DECL); /* Must be a field. */
5943 assert (type); /* Must be a bit field. */
5944
5945 /* We can't yet handle bit-fields whose offsets are variable, so if we
5946 encounter such things, just return without generating any attribute
5947 whatsoever. */
5948 if (TREE_CODE (bitpos_tree) != INTEGER_CST)
5949 {
5950 return;
5951 }
5952 bitpos_int = (unsigned) TREE_INT_CST_LOW (bitpos_tree);
5953
5954 /* Note that the bit offset is always the distance (in bits) from the
5955 highest-order bit of the "containing object" to the highest-order bit of
5956 the bit-field itself. Since the "high-order end" of any object or field
5957 is different on big-endian and little-endian machines, the computation
5958 below must take account of these differences. */
5959 highest_order_object_bit_offset = object_offset_in_bytes * BITS_PER_UNIT;
5960 highest_order_field_bit_offset = bitpos_int;
5961
5962 if (!BYTES_BIG_ENDIAN)
5963 {
5964 highest_order_field_bit_offset
5965 += (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl));
5966
5967 highest_order_object_bit_offset += simple_type_size_in_bits (type);
5968 }
5969 bit_offset =
5970 (!BYTES_BIG_ENDIAN
5971 ? highest_order_object_bit_offset - highest_order_field_bit_offset
5972 : highest_order_field_bit_offset - highest_order_object_bit_offset);
5973
5974 add_AT_unsigned (die, DW_AT_bit_offset, bit_offset);
5975}
5976
5977/* For a FIELD_DECL node which represents a bit field, output an attribute
5978 which specifies the length in bits of the given field. */
5979inline void
5980add_bit_size_attribute (die, decl)
5981 register dw_die_ref die;
5982 register tree decl;
5983{
5984 assert (TREE_CODE (decl) == FIELD_DECL); /* Must be a field. */
5985 assert (DECL_BIT_FIELD_TYPE (decl)); /* Must be a bit field. */
5986 add_AT_unsigned (die, DW_AT_bit_size,
5987 (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl)));
5988}
5989
88dad228 5990/* If the compiled language is ANSI C, then add a 'prototyped'
a3f97cbb
JW		 5991 attribute, if arg types are given for the parameters of a function. */
5992inline void
5993add_prototyped_attribute (die, func_type)
5994 register dw_die_ref die;
5995 register tree func_type;
5996{
88dad228
JM		 5997 if (get_AT_unsigned (comp_unit_die, DW_AT_language) == DW_LANG_C89
5998 && TYPE_ARG_TYPES (func_type) != NULL)
5999 add_AT_flag (die, DW_AT_prototyped, 1);
a3f97cbb
JW		 6000}
6001
6002
6003/* Add an 'abstract_origin' attribute below a given DIE. The DIE is found
6004 by looking in either the type declaration or object declaration
6005 equate table. */
6006inline void
6007add_abstract_origin_attribute (die, origin)
6008 register dw_die_ref die;
6009 register tree origin;
6010{
6011 dw_die_ref origin_die = NULL;
6012 if (TREE_CODE_CLASS (TREE_CODE (origin)) == 'd')
6013 {
6014 origin_die = lookup_decl_die (origin);
6015 }
6016 else if (TREE_CODE_CLASS (TREE_CODE (origin)) == 't')
6017 {
6018 origin_die = lookup_type_die (origin);
6019 }
6020 add_AT_die_ref (die, DW_AT_abstract_origin, origin_die);
6021}
6022
bdb669cb
JM		 6023/* We do not currently support the pure_virtual attribute. */
6024
a3f97cbb
JW		 6025inline void
6026add_pure_or_virtual_attribute (die, func_decl)
6027 register dw_die_ref die;
6028 register tree func_decl;
6029{
a94dbf2c 6030 if (DECL_VINDEX (func_decl))
a3f97cbb 6031 {
bdb669cb 6032 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
61b32c02
JM		 6033 add_AT_loc (die, DW_AT_vtable_elem_location, new_loc_descr
6034 (DW_OP_constu, TREE_INT_CST_LOW (DECL_VINDEX (func_decl))));
a94dbf2c
JM		 6035 /* GNU extension: Record what type this method came from originally. */
6036 if (debug_info_level > DINFO_LEVEL_TERSE)
6037 add_AT_die_ref (die, DW_AT_containing_type,
6038 lookup_type_die (DECL_CONTEXT (func_decl)));
a3f97cbb
JW		 6039 }
6040}
6041\f
6042/********************* utility routines for DIEs *************************/
6043
b2932ae5
JM		 6044/* Add source coordinate attributes for the given decl. */
6045static void
6046add_src_coords_attributes (die, decl)
6047 register dw_die_ref die;
6048 register tree decl;
6049{
6050 register unsigned file_index = lookup_filename (DECL_SOURCE_FILE (decl));
6051 add_AT_unsigned (die, DW_AT_decl_file, file_index);
6052 add_AT_unsigned (die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
6053}
6054
a3f97cbb
JW		 6055/* Add an DW_AT_name attribute and source coordinate attribute for the
6056 given decl, but only if it actually has a name. */
6057static void
6058add_name_and_src_coords_attributes (die, decl)
6059 register dw_die_ref die;
6060 register tree decl;
6061{
61b32c02 6062 register tree decl_name;
273dbe67 6063 if (TREE_CODE (decl) == FUNCTION_DECL || TREE_CODE (decl) == VAR_DECL)
61b32c02
JM		 6064 decl_name = DECL_ASSEMBLER_NAME (decl);
6065 else
6066 decl_name = DECL_NAME (decl);
6067
a3f97cbb
JW		 6068 if (decl_name && IDENTIFIER_POINTER (decl_name))
6069 {
6070 add_name_attribute (die, IDENTIFIER_POINTER (decl_name));
b2932ae5 6071 add_src_coords_attributes (die, decl);
a3f97cbb
JW		 6072 }
6073}
6074
6075/* Push a new declaration scope. */
6076static void
6077push_decl_scope (scope)
6078 tree scope;
6079{
6080 /* Make room in the decl_scope_table, if necessary. */
6081 if (decl_scope_table_allocated == decl_scope_depth)
6082 {
6083 decl_scope_table_allocated += DECL_SCOPE_TABLE_INCREMENT;
6084 decl_scope_table = (tree *) xrealloc (decl_scope_table,
6085 decl_scope_table_allocated * sizeof (tree));
6086 }
6087 decl_scope_table[decl_scope_depth++] = scope;
6088}
6089
6090/* Return the DIE for the scope the immediately contains this declaration. */
6091static dw_die_ref
ab72d377
JM		 6092scope_die_for (t, context_die)
6093 register tree t;
a3f97cbb
JW		 6094 register dw_die_ref context_die;
6095{
6096 register dw_die_ref scope_die = NULL;
6097 register tree containing_scope;
6098 register unsigned long i;
6099
88dad228
JM		 6100 /* Function-local tags and functions get stuck in limbo until they are
6101 fixed up by decls_for_scope. */
a94dbf2c
JM		 6102 if (context_die == NULL
6103 && (TREE_CODE (t) == FUNCTION_DECL || is_tagged_type (t)))
88dad228
JM		 6104 return NULL;
6105
a3f97cbb
JW		 6106 /* Walk back up the declaration tree looking for a place to define
6107 this type. */
ab72d377
JM		 6108 if (TREE_CODE_CLASS (TREE_CODE (t)) == 't')
6109 containing_scope = TYPE_CONTEXT (t);
a94dbf2c 6110 else if (TREE_CODE (t) == FUNCTION_DECL && DECL_VINDEX (t))
ab72d377
JM		 6111 containing_scope = decl_class_context (t);
6112 else
6113 containing_scope = DECL_CONTEXT (t);
6114
a3f97cbb
JW		 6115 if (containing_scope == NULL)
6116 {
6117 scope_die = comp_unit_die;
6118 }
6119 else
6120 {
ab72d377
JM		 6121 for (i = decl_scope_depth, scope_die = context_die;
6122 i > 0 && decl_scope_table[i - 1] != containing_scope;
7d4440be
JM		 6123 scope_die = scope_die->die_parent, --i)
6124 /* nothing */ ;
ab72d377 6125 if (i == 0)
a3f97cbb 6126 {
ab72d377
JM		 6127 assert (scope_die == comp_unit_die);
6128 assert (TREE_CODE_CLASS (TREE_CODE (containing_scope)) == 't');
4927276d
JM		 6129 if (debug_info_level > DINFO_LEVEL_TERSE)
6130 assert (TREE_ASM_WRITTEN (containing_scope));
a3f97cbb
JW		 6131 }
6132 }
6133 return scope_die;
6134}
6135
6136/* Pop a declaration scope. */
6137inline void
6138pop_decl_scope ()
6139{
6140 assert (decl_scope_depth > 0);
6141 --decl_scope_depth;
6142}
6143
6144/* Many forms of DIEs require a "type description" attribute. This
6145 routine locates the proper "type descriptor" die for the type given
6146 by 'type', and adds an DW_AT_type attribute below the given die. */
6147static void
6148add_type_attribute (object_die, type, decl_const, decl_volatile, context_die)
6149 register dw_die_ref object_die;
6150 register tree type;
6151 register int decl_const;
6152 register int decl_volatile;
6153 register dw_die_ref context_die;
6154{
6155 register enum tree_code code = TREE_CODE (type);
a3f97cbb
JW		 6156 register dw_die_ref type_die = NULL;
6157
6158 if (code == ERROR_MARK)
6159 {
6160 return;
6161 }
6162
6163 /* Handle a special case. For functions whose return type is void, we
6164 generate *no* type attribute. (Note that no object may have type
6165 `void', so this only applies to function return types). */
6166 if (code == VOID_TYPE)
6167 {
6168 return;
6169 }
6170
a3f97cbb
JW		 6171 type_die = modified_type_die (type,
6172 decl_const || TYPE_READONLY (type),
6173 decl_volatile || TYPE_VOLATILE (type),
ab72d377 6174 context_die);
a3f97cbb
JW		 6175 if (type_die != NULL)
6176 {
6177 add_AT_die_ref (object_die, DW_AT_type, type_die);
6178 }
6179}
6180
6181/* Given a tree pointer to a struct, class, union, or enum type node, return
6182 a pointer to the (string) tag name for the given type, or zero if the type
6183 was declared without a tag. */
6184static char *
6185type_tag (type)
6186 register tree type;
6187{
6188 register char *name = 0;
6189
6190 if (TYPE_NAME (type) != 0)
6191 {
6192 register tree t = 0;
6193
6194 /* Find the IDENTIFIER_NODE for the type name. */
6195 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
6196 t = TYPE_NAME (type);
bdb669cb 6197
a3f97cbb
JW		 6198 /* The g++ front end makes the TYPE_NAME of *each* tagged type point to
6199 a TYPE_DECL node, regardless of whether or not a `typedef' was
bdb669cb 6200 involved. */
a94dbf2c
JM		 6201 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
6202 && ! DECL_IGNORED_P (TYPE_NAME (type)))
a3f97cbb 6203 t = DECL_NAME (TYPE_NAME (type));
bdb669cb 6204
a3f97cbb
JW		 6205 /* Now get the name as a string, or invent one. */
6206 if (t != 0)
a94dbf2c 6207 name = IDENTIFIER_POINTER (t);
a3f97cbb
JW		 6208 }
6209 return (name == 0 || *name == '\0') ? 0 : name;
6210}
6211
6212/* Return the type associated with a data member, make a special check
6213 for bit field types. */
6214inline tree
6215member_declared_type (member)
6216 register tree member;
6217{
6218 return (DECL_BIT_FIELD_TYPE (member))
6219 ? DECL_BIT_FIELD_TYPE (member)
6220 : TREE_TYPE (member);
6221}
6222
d291dd49 6223/* Get the decl's label, as described by its RTL. This may be different
a3f97cbb
JW		 6224 from the DECL_NAME name used in the source file. */
6225static char *
d291dd49 6226decl_start_label (decl)
a3f97cbb
JW		 6227 register tree decl;
6228{
6229 rtx x;
6230 char *fnname;
6231 x = DECL_RTL (decl);
6232 if (GET_CODE (x) != MEM)
6233 {
6234 abort ();
6235 }
6236 x = XEXP (x, 0);
6237 if (GET_CODE (x) != SYMBOL_REF)
6238 {
6239 abort ();
6240 }
6241 fnname = XSTR (x, 0);
6242 return fnname;
6243}
6244\f
6245/******************************* DIE Generation *************************/
6246
6247/* These routines generate the internnal representation of the DIE's for
6248 the compilation unit. Debugging information is collected by walking
88dad228 6249 the declaration trees passed in from dwarf2out_decl(). */
a3f97cbb
JW		 6250
6251static void
6252gen_array_type_die (type, context_die)
6253 register tree type;
6254 register dw_die_ref context_die;
6255{
ab72d377 6256 register dw_die_ref scope_die = scope_die_for (type, context_die);
a9d38797 6257 register dw_die_ref array_die;
a3f97cbb 6258 register tree element_type;
bdb669cb 6259
a9d38797
JM		 6260 /* ??? The SGI dwarf reader fails for array of array of enum types unless
6261 the inner array type comes before the outer array type. Thus we must
6262 call gen_type_die before we call new_die. See below also. */
6263#ifdef MIPS_DEBUGGING_INFO
6264 gen_type_die (TREE_TYPE (type), context_die);
6265#endif
6266
6267 array_die = new_die (DW_TAG_array_type, scope_die);
6268
a3f97cbb
JW		 6269#if 0
6270 /* We default the array ordering. SDB will probably do
6271 the right things even if DW_AT_ordering is not present. It's not even
6272 an issue until we start to get into multidimensional arrays anyway. If
6273 SDB is ever caught doing the Wrong Thing for multi-dimensional arrays,
6274 then we'll have to put the DW_AT_ordering attribute back in. (But if
6275 and when we find out that we need to put these in, we will only do so
6276 for multidimensional arrays. */
6277 add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_row_major);
6278#endif
6279
a9d38797 6280#ifdef MIPS_DEBUGGING_INFO
4edb7b60
JM		 6281 /* The SGI compilers handle arrays of unknown bound by setting
6282 AT_declaration and not emitting any subrange DIEs. */
a9d38797
JM		 6283 if (! TYPE_DOMAIN (type))
6284 add_AT_unsigned (array_die, DW_AT_declaration, 1);
6285 else
6286#endif
6287 add_subscript_info (array_die, type);
a3f97cbb
JW		 6288
6289 equate_type_number_to_die (type, array_die);
6290
6291 /* Add representation of the type of the elements of this array type. */
6292 element_type = TREE_TYPE (type);
6293 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
6294 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
6295 We work around this by disabling this feature. See also
6296 add_subscript_info. */
6297#ifndef MIPS_DEBUGGING_INFO
6298 while (TREE_CODE (element_type) == ARRAY_TYPE)
6299 {
6300 element_type = TREE_TYPE (element_type);
6301 }
a3f97cbb 6302 gen_type_die (element_type, context_die);
a9d38797 6303#endif
a3f97cbb
JW		 6304
6305 add_type_attribute (array_die, element_type, 0, 0, context_die);
6306}
6307
6308static void
6309gen_set_type_die (type, context_die)
6310 register tree type;
6311 register dw_die_ref context_die;
6312{
ab72d377
JM		 6313 register dw_die_ref type_die = new_die
6314 (DW_TAG_set_type, scope_die_for (type, context_die));
a3f97cbb 6315 equate_type_number_to_die (type, type_die);
a3f97cbb
JW		 6316 add_type_attribute (type_die, TREE_TYPE (type), 0, 0, context_die);
6317}
6318
6319static void
6320gen_entry_point_die (decl, context_die)
6321 register tree decl;
6322 register dw_die_ref context_die;
6323{
6324 register tree origin = decl_ultimate_origin (decl);
6325 register dw_die_ref decl_die = new_die (DW_TAG_entry_point, context_die);
6326 if (origin != NULL)
6327 {
6328 add_abstract_origin_attribute (decl_die, origin);
6329 }
6330 else
6331 {
6332 add_name_and_src_coords_attributes (decl_die, decl);
a3f97cbb
JW		 6333 add_type_attribute (decl_die, TREE_TYPE (TREE_TYPE (decl)),
6334 0, 0, context_die);
6335 }
6336 if (DECL_ABSTRACT (decl))
6337 {
6338 equate_decl_number_to_die (decl, decl_die);
6339 }
6340 else
6341 {
d291dd49 6342 add_AT_lbl_id (decl_die, DW_AT_low_pc, decl_start_label (decl));
a3f97cbb
JW		 6343 }
6344}
6345
a94dbf2c
JM		 6346/* Remember a type in the pending_types_list. */
6347
6348static void
6349pend_type (type)
6350 register tree type;
6351{
6352 if (pending_types == pending_types_allocated)
6353 {
6354 pending_types_allocated += PENDING_TYPES_INCREMENT;
6355 pending_types_list
6356 = (tree *) xrealloc (pending_types_list,
6357 sizeof (tree) * pending_types_allocated);
6358 }
6359 pending_types_list[pending_types++] = type;
6360}
6361
6362/* Output any pending types (from the pending_types list) which we can output
6363 now (taking into account the scope that we are working on now).
6364
6365 For each type output, remove the given type from the pending_types_list
6366 *before* we try to output it. */
6367
6368static void
6369output_pending_types_for_scope (context_die)
6370 register dw_die_ref context_die;
6371{
6372 register tree type;
6373
6374 while (pending_types)
6375 {
6376 --pending_types;
6377 type = pending_types_list[pending_types];
6378 gen_type_die (type, context_die);
6379 assert (TREE_ASM_WRITTEN (type));
6380 }
6381}
6382
a3f97cbb
JW		 6383/* Generate a DIE to represent an inlined instance of an enumeration type. */
6384static void
6385gen_inlined_enumeration_type_die (type, context_die)
6386 register tree type;
6387 register dw_die_ref context_die;
6388{
6389 register dw_die_ref type_die;
6390 type_die = new_die (DW_TAG_enumeration_type,
ab72d377 6391 scope_die_for (type, context_die));
a3f97cbb
JW		 6392 assert (TREE_ASM_WRITTEN (type));
6393 add_abstract_origin_attribute (type_die, type);
6394}
6395
6396/* Generate a DIE to represent an inlined instance of a structure type. */
6397static void
6398gen_inlined_structure_type_die (type, context_die)
6399 register tree type;
6400 register dw_die_ref context_die;
6401{
6402 register dw_die_ref type_die;
6403 type_die = new_die (DW_TAG_structure_type,
ab72d377 6404 scope_die_for (type, context_die));
a3f97cbb
JW		 6405 assert (TREE_ASM_WRITTEN (type));
6406 add_abstract_origin_attribute (type_die, type);
6407}
6408
6409/* Generate a DIE to represent an inlined instance of a union type. */
6410static void
6411gen_inlined_union_type_die (type, context_die)
6412 register tree type;
6413 register dw_die_ref context_die;
6414{
6415 register dw_die_ref type_die;
6416 type_die = new_die (DW_TAG_union_type,
ab72d377 6417 scope_die_for (type, context_die));
a3f97cbb
JW		 6418 assert (TREE_ASM_WRITTEN (type));
6419 add_abstract_origin_attribute (type_die, type);
6420}
6421
6422/* Generate a DIE to represent an enumeration type. Note that these DIEs
6423 include all of the information about the enumeration values also. Each
273dbe67
JM		 6424 enumerated type name/value is listed as a child of the enumerated type
6425 DIE. */
a3f97cbb 6426static void
273dbe67 6427gen_enumeration_type_die (type, context_die)
a3f97cbb 6428 register tree type;
a3f97cbb
JW		 6429 register dw_die_ref context_die;
6430{
273dbe67
JM		 6431 register dw_die_ref type_die = lookup_type_die (type);
6432
a3f97cbb
JW		 6433 if (type_die == NULL)
6434 {
6435 type_die = new_die (DW_TAG_enumeration_type,
ab72d377 6436 scope_die_for (type, context_die));
a3f97cbb
JW		 6437 equate_type_number_to_die (type, type_die);
6438 add_name_attribute (type_die, type_tag (type));
a3f97cbb 6439 }
273dbe67
JM		 6440 else if (! TYPE_SIZE (type))
6441 return;
6442 else
6443 remove_AT (type_die, DW_AT_declaration);
6444
6445 /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the
6446 given enum type is incomplete, do not generate the DW_AT_byte_size
6447 attribute or the DW_AT_element_list attribute. */
6448 if (TYPE_SIZE (type))
a3f97cbb 6449 {
273dbe67 6450 register tree link;
a082c85a 6451 TREE_ASM_WRITTEN (type) = 1;
273dbe67 6452 add_byte_size_attribute (type_die, type);
b2932ae5
JM		 6453 if (type_tag (type))
6454 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
273dbe67
JM		 6455 for (link = TYPE_FIELDS (type);
6456 link != NULL; link = TREE_CHAIN (link))
a3f97cbb 6457 {
273dbe67
JM		 6458 register dw_die_ref enum_die = new_die (DW_TAG_enumerator, type_die);
6459 add_name_attribute (enum_die,
6460 IDENTIFIER_POINTER (TREE_PURPOSE (link)));
6461 add_AT_unsigned (enum_die, DW_AT_const_value,
a3f97cbb 6462 (unsigned) TREE_INT_CST_LOW (TREE_VALUE (link)));
a3f97cbb
JW		 6463 }
6464 }
273dbe67
JM		 6465 else
6466 add_AT_flag (type_die, DW_AT_declaration, 1);
a3f97cbb
JW		 6467}
6468
6469
6470/* Generate a DIE to represent either a real live formal parameter decl or to
6471 represent just the type of some formal parameter position in some function
6472 type.
6473 Note that this routine is a bit unusual because its argument may be a
6474 ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which
6475 represents an inlining of some PARM_DECL) or else some sort of a ..._TYPE
6476 node. If it's the former then this function is being called to output a
6477 DIE to represent a formal parameter object (or some inlining thereof). If
6478 it's the latter, then this function is only being called to output a
6479 DW_TAG_formal_parameter DIE to stand as a placeholder for some formal
6480 argument type of some subprogram type. */
a94dbf2c 6481static dw_die_ref
a3f97cbb
JW		 6482gen_formal_parameter_die (node, context_die)
6483 register tree node;
6484 register dw_die_ref context_die;
6485{
6486 register dw_die_ref parm_die = new_die (DW_TAG_formal_parameter,
6487 context_die);
6488 register tree origin;
6489 switch (TREE_CODE_CLASS (TREE_CODE (node)))
6490 {
6491 /* We were called with some kind of a ..._DECL node. */
6492 case 'd':
6493 origin = decl_ultimate_origin (node);
6494 if (origin != NULL)
a94dbf2c 6495 add_abstract_origin_attribute (parm_die, origin);
a3f97cbb
JW		 6496 else
6497 {
6498 add_name_and_src_coords_attributes (parm_die, node);
6499 add_type_attribute (parm_die, TREE_TYPE (node),
6500 TREE_READONLY (node),
6501 TREE_THIS_VOLATILE (node),
6502 context_die);
bdb669cb
JM		 6503 if (DECL_ARTIFICIAL (node))
6504 add_AT_flag (parm_die, DW_AT_artificial, 1);
a3f97cbb
JW		 6505 }
6506 if (DECL_ABSTRACT (node))
a94dbf2c 6507 equate_decl_number_to_die (node, parm_die);
a3f97cbb 6508 else
a94dbf2c 6509 add_location_or_const_value_attribute (parm_die, node);
a3f97cbb
JW		 6510 break;
6511
6512 /* We were called with some kind of a ..._TYPE node. */
6513 case 't':
6514 add_type_attribute (parm_die, node, 0, 0, context_die);
6515 break;
6516
6517 /* Should never happen. */
6518 default:
6519 abort ();
6520 }
a94dbf2c 6521 return parm_die;
a3f97cbb
JW		 6522}
6523
6524/* Generate a special type of DIE used as a stand-in for a trailing ellipsis
6525 at the end of an (ANSI prototyped) formal parameters list. */
6526static void
6527gen_unspecified_parameters_die (decl_or_type, context_die)
6528 register tree decl_or_type;
6529 register dw_die_ref context_die;
6530{
6531 register dw_die_ref parm_die = new_die (DW_TAG_unspecified_parameters,
6532 context_die);
a3f97cbb
JW		 6533}
6534
6535/* Generate a list of nameless DW_TAG_formal_parameter DIEs (and perhaps a
6536 DW_TAG_unspecified_parameters DIE) to represent the types of the formal
6537 parameters as specified in some function type specification (except for
6538 those which appear as part of a function *definition*).
6539 Note that we must be careful here to output all of the parameter DIEs before*
6540 we output any DIEs needed to represent the types of the formal parameters.
6541 This keeps svr4 SDB happy because it (incorrectly) thinks that the first
6542 non-parameter DIE it sees ends the formal parameter list. */
6543static void
6544gen_formal_types_die (function_or_method_type, context_die)
6545 register tree function_or_method_type;
6546 register dw_die_ref context_die;
6547{
6548 register tree link;
6549 register tree formal_type = NULL;
6550 register tree first_parm_type = TYPE_ARG_TYPES (function_or_method_type);
6551
bdb669cb 6552#if 0
a3f97cbb
JW		 6553 /* In the case where we are generating a formal types list for a C++
6554 non-static member function type, skip over the first thing on the
6555 TYPE_ARG_TYPES list because it only represents the type of the hidden
6556 `this pointer'. The debugger should be able to figure out (without
6557 being explicitly told) that this non-static member function type takes a
6558 `this pointer' and should be able to figure what the type of that hidden
6559 parameter is from the DW_AT_member attribute of the parent
6560 DW_TAG_subroutine_type DIE. */
6561 if (TREE_CODE (function_or_method_type) == METHOD_TYPE)
6562 first_parm_type = TREE_CHAIN (first_parm_type);
bdb669cb 6563#endif
a3f97cbb
JW		 6564
6565 /* Make our first pass over the list of formal parameter types and output a
6566 DW_TAG_formal_parameter DIE for each one. */
6567 for (link = first_parm_type; link; link = TREE_CHAIN (link))
6568 {
a94dbf2c
JM		 6569 register dw_die_ref parm_die;
6570
a3f97cbb
JW		 6571 formal_type = TREE_VALUE (link);
6572 if (formal_type == void_type_node)
6573 break;
6574
6575 /* Output a (nameless) DIE to represent the formal parameter itself. */
a94dbf2c
JM		 6576 parm_die = gen_formal_parameter_die (formal_type, context_die);
6577 if (TREE_CODE (function_or_method_type) == METHOD_TYPE
6578 && link == first_parm_type)
6579 add_AT_flag (parm_die, DW_AT_artificial, 1);
a3f97cbb
JW		 6580 }
6581
6582 /* If this function type has an ellipsis, add a
6583 DW_TAG_unspecified_parameters DIE to the end of the parameter list. */
6584 if (formal_type != void_type_node)
6585 gen_unspecified_parameters_die (function_or_method_type, context_die);
6586
6587 /* Make our second (and final) pass over the list of formal parameter types
6588 and output DIEs to represent those types (as necessary). */
6589 for (link = TYPE_ARG_TYPES (function_or_method_type);
6590 link;
6591 link = TREE_CHAIN (link))
6592 {
6593 formal_type = TREE_VALUE (link);
6594 if (formal_type == void_type_node)
6595 break;
6596
b50c02f9 6597 gen_type_die (formal_type, context_die);
a3f97cbb
JW		 6598 }
6599}
6600
6601/* Generate a DIE to represent a declared function (either file-scope or
6602 block-local). */
6603static void
6604gen_subprogram_die (decl, context_die)
6605 register tree decl;
6606 register dw_die_ref context_die;
6607{
6608 char label_id[MAX_ARTIFICIAL_LABEL_BYTES];
6609 register tree origin = decl_ultimate_origin (decl);
4b674448 6610 register dw_die_ref subr_die;
a3f97cbb
JW		 6611 register dw_loc_descr_ref fp_loc = NULL;
6612 register unsigned fp_reg;
a3f97cbb
JW		 6613 register tree fn_arg_types;
6614 register tree outer_scope;
a94dbf2c
JM		 6615 register dw_die_ref old_die = lookup_decl_die (decl);
6616 register int declaration = (current_function_decl != decl
6617 || context_die->die_tag == DW_TAG_structure_type
6618 || context_die->die_tag == DW_TAG_union_type);
a3f97cbb 6619
a3f97cbb
JW		 6620 if (origin != NULL)
6621 {
4b674448 6622 subr_die = new_die (DW_TAG_subprogram, context_die);
a3f97cbb
JW		 6623 add_abstract_origin_attribute (subr_die, origin);
6624 }
bdb669cb
JM		 6625 else if (old_die)
6626 {
4b674448
JM		 6627 register unsigned file_index
6628 = lookup_filename (DECL_SOURCE_FILE (decl));
a94dbf2c
JM		 6629
6630 assert (get_AT_flag (old_die, DW_AT_declaration) == 1);
4b674448
JM		 6631
6632 /* If the definition comes from the same place as the declaration,
a94dbf2c
JM		 6633 maybe use the old DIE. We always want the DIE for this function
6634 that has the *_pc attributes to be under comp_unit_die so the
6635 debugger can find it. For inlines, that is the concrete instance,
6636 so we can use the old DIE here. For non-inline methods, we want a
6637 specification DIE at toplevel, so we need a new DIE. For local
6638 class methods, this does not apply. */
6639 if ((DECL_ABSTRACT (decl) || old_die->die_parent == comp_unit_die
6640 || context_die == NULL)
6641 && get_AT_unsigned (old_die, DW_AT_decl_file) == file_index
4b674448
JM		 6642 && (get_AT_unsigned (old_die, DW_AT_decl_line)
6643 == DECL_SOURCE_LINE (decl)))
bdb669cb 6644 {
4b674448
JM		 6645 subr_die = old_die;
6646
6647 /* Clear out the declaration attribute and the parm types. */
6648 remove_AT (subr_die, DW_AT_declaration);
6649 remove_children (subr_die);
6650 }
6651 else
6652 {
6653 subr_die = new_die (DW_TAG_subprogram, context_die);
6654 add_AT_die_ref (subr_die, DW_AT_specification, old_die);
bdb669cb
JM		 6655 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
6656 add_AT_unsigned (subr_die, DW_AT_decl_file, file_index);
6657 if (get_AT_unsigned (old_die, DW_AT_decl_line)
6658 != DECL_SOURCE_LINE (decl))
6659 add_AT_unsigned
6660 (subr_die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
6661 }
6662 }
a3f97cbb
JW		 6663 else
6664 {
4edb7b60
JM		 6665 register dw_die_ref scope_die;
6666
6667 if (DECL_CONTEXT (decl))
6668 scope_die = scope_die_for (decl, context_die);
6669 else
6670 /* Don't put block extern declarations under comp_unit_die. */
6671 scope_die = context_die;
6672
6673 subr_die = new_die (DW_TAG_subprogram, scope_die);
6674
273dbe67
JM		 6675 if (TREE_PUBLIC (decl))
6676 add_AT_flag (subr_die, DW_AT_external, 1);
a3f97cbb 6677 add_name_and_src_coords_attributes (subr_die, decl);
4927276d
JM		 6678 if (debug_info_level > DINFO_LEVEL_TERSE)
6679 {
6680 register tree type = TREE_TYPE (decl);
6681 add_prototyped_attribute (subr_die, type);
6682 add_type_attribute (subr_die, TREE_TYPE (type), 0, 0, context_die);
6683 }
a3f97cbb 6684 add_pure_or_virtual_attribute (subr_die, decl);
273dbe67
JM		 6685 if (DECL_ARTIFICIAL (decl))
6686 add_AT_flag (subr_die, DW_AT_artificial, 1);
a94dbf2c
JM		 6687 if (TREE_PROTECTED (decl))
6688 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_protected);
6689 else if (TREE_PRIVATE (decl))
6690 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_private);
a3f97cbb 6691 }
4edb7b60 6692
a94dbf2c
JM		 6693 if (declaration)
6694 {
6695 add_AT_flag (subr_die, DW_AT_declaration, 1);
6696
6697 /* The first time we see a member function, it is in the context of
6698 the class to which it belongs. We make sure of this by emitting
6699 the class first. The next time is the definition, which is
6700 handled above. The two may come from the same source text. */
6701 if (decl_class_context (decl))
6702 equate_decl_number_to_die (decl, subr_die);
6703 }
6704 else if (DECL_ABSTRACT (decl))
a3f97cbb 6705 {
61b32c02
JM		 6706 if (DECL_DEFER_OUTPUT (decl))
6707 {
6708 if (DECL_INLINE (decl))
6709 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_inlined);
6710 else
6711 add_AT_unsigned (subr_die, DW_AT_inline,
6712 DW_INL_declared_not_inlined);
6713 }
6714 else if (DECL_INLINE (decl))
6715 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_inlined);
4edb7b60
JM		 6716 else if (declaration)
6717 /* block extern declaration in an inline function. */
6718 add_AT_flag (subr_die, DW_AT_declaration, 1);
61b32c02
JM		 6719 else
6720 abort ();
6721
a3f97cbb
JW		 6722 equate_decl_number_to_die (decl, subr_die);
6723 }
6724 else if (!DECL_EXTERNAL (decl))
6725 {
ba7b35df
JW		 6726 if (origin == NULL)
6727 equate_decl_number_to_die (decl, subr_die);
5c90448c
JM		 6728 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_BEGIN_LABEL,
6729 current_funcdef_number);
7d4440be 6730 add_AT_lbl_id (subr_die, DW_AT_low_pc, label_id);
5c90448c
JM		 6731 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL,
6732 current_funcdef_number);
a3f97cbb
JW		 6733 add_AT_lbl_id (subr_die, DW_AT_high_pc, label_id);
6734
d291dd49
JM		 6735 add_pubname (decl, subr_die);
6736 add_arange (decl, subr_die);
6737
a3f97cbb 6738#ifdef MIPS_DEBUGGING_INFO
a3f97cbb
JW		 6739 /* Add a reference to the FDE for this routine. */
6740 add_AT_fde_ref (subr_die, DW_AT_MIPS_fde, current_funcdef_fde);
6741#endif
6742
810429b7
JM		 6743 /* Define the "frame base" location for this routine. We use the
6744 frame pointer or stack pointer registers, since the RTL for local
6745 variables is relative to one of them. */
6746 fp_reg = DBX_REGISTER_NUMBER (frame_pointer_needed
6747 ? FRAME_POINTER_REGNUM
6748 : STACK_POINTER_REGNUM);
a3f97cbb 6749 assert (fp_reg >= 0 && fp_reg <= 31);
810429b7 6750 fp_loc = new_loc_descr (DW_OP_reg0 + fp_reg);
a3f97cbb
JW		 6751 add_AT_loc (subr_die, DW_AT_frame_base, fp_loc);
6752
88dad228
JM		 6753 if (current_function_needs_context)
6754 add_AT_loc (subr_die, DW_AT_static_link,
6755 loc_descriptor (lookup_static_chain (decl)));
a3f97cbb
JW		 6756 }
6757
6758 /* Now output descriptions of the arguments for this function. This gets
6759 (unnecessarily?) complex because of the fact that the DECL_ARGUMENT list
6760 for a FUNCTION_DECL doesn't indicate cases where there was a trailing
6761 `...' at the end of the formal parameter list. In order to find out if
6762 there was a trailing ellipsis or not, we must instead look at the type
6763 associated with the FUNCTION_DECL. This will be a node of type
6764 FUNCTION_TYPE. If the chain of type nodes hanging off of this
6765 FUNCTION_TYPE node ends with a void_type_node then there should *not* be
6766 an ellipsis at the end. */
6767
ab72d377 6768 push_decl_scope (decl);
a3f97cbb
JW		 6769 /* In the case where we are describing a mere function declaration, all we
6770 need to do here (and all we *can* do here) is to describe the *types* of
6771 its formal parameters. */
4927276d
JM		 6772 if (debug_info_level <= DINFO_LEVEL_TERSE)
6773 /* do nothing */;
4edb7b60
JM		 6774 else if (declaration)
6775 gen_formal_types_die (TREE_TYPE (decl), subr_die);
a3f97cbb
JW		 6776 else
6777 {
6778 /* Generate DIEs to represent all known formal parameters */
6779 register tree arg_decls = DECL_ARGUMENTS (decl);
6780 register tree parm;
6781
6782 /* When generating DIEs, generate the unspecified_parameters DIE
6783 instead if we come across the arg "__builtin_va_alist" */
6784 for (parm = arg_decls; parm; parm = TREE_CHAIN (parm))
6785 {
6786 if (TREE_CODE (parm) == PARM_DECL)
6787 {
6788 if (DECL_NAME (parm) &&
6789 !strcmp (IDENTIFIER_POINTER (DECL_NAME (parm)),
6790 "__builtin_va_alist"))
6791 {
6792 gen_unspecified_parameters_die (parm, subr_die);
6793 }
6794 else
6795 {
6796 gen_decl_die (parm, subr_die);
6797 }
6798 }
6799 }
6800
6801 /* Decide whether we need a unspecified_parameters DIE at the end.
6802 There are 2 more cases to do this for: 1) the ansi ... declaration -
6803 this is detectable when the end of the arg list is not a
6804 void_type_node 2) an unprototyped function declaration (not a
6805 definition). This just means that we have no info about the
6806 parameters at all. */
6807 fn_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl));
6808 if (fn_arg_types)
6809 {
6810 /* this is the prototyped case, check for ... */
6811 if (TREE_VALUE (tree_last (fn_arg_types)) != void_type_node)
6812 {
6813 gen_unspecified_parameters_die (decl, subr_die);
6814 }
6815 }
6816 else
6817 {
6818 /* this is unprotoyped, check for undefined (just declaration) */
6819 if (!DECL_INITIAL (decl))
6820 {
6821 gen_unspecified_parameters_die (decl, subr_die);
6822 }
6823 }
6824 }
6825
6826 /* Output Dwarf info for all of the stuff within the body of the function
6827 (if it has one - it may be just a declaration). */
6828 outer_scope = DECL_INITIAL (decl);
6829
d7248bff
JM		 6830 /* Note that here, `outer_scope' is a pointer to the outermost BLOCK
6831 node created to represent a function. This outermost BLOCK actually
6832 represents the outermost binding contour for the function, i.e. the
6833 contour in which the function's formal parameters and labels get
6834 declared. Curiously, it appears that the front end doesn't actually
6835 put the PARM_DECL nodes for the current function onto the BLOCK_VARS
6836 list for this outer scope. (They are strung off of the DECL_ARGUMENTS
6837 list for the function instead.) The BLOCK_VARS list for the
6838 `outer_scope' does provide us with a list of the LABEL_DECL nodes for
6839 the function however, and we output DWARF info for those in
6840 decls_for_scope. Just within the `outer_scope' there will be a BLOCK
6841 node representing the function's outermost pair of curly braces, and
6842 any blocks used for the base and member initializers of a C++
6843 constructor function. */
4edb7b60 6844 if (! declaration && TREE_CODE (outer_scope) != ERROR_MARK)
7e23cb16
JM		 6845 {
6846 current_function_has_inlines = 0;
6847 decls_for_scope (outer_scope, subr_die, 0);
ce61cc73 6848#if 0 && defined (MIPS_DEBUGGING_INFO)
7e23cb16
JM		 6849 if (current_function_has_inlines)
6850 {
6851 add_AT_flag (subr_die, DW_AT_MIPS_has_inlines, 1);
6852 if (! comp_unit_has_inlines)
6853 {
6854 add_AT_flag (comp_unit_die, DW_AT_MIPS_has_inlines, 1);
6855 comp_unit_has_inlines = 1;
6856 }
6857 }
6858#endif
6859 }
ab72d377 6860 pop_decl_scope ();
a3f97cbb
JW		 6861}
6862
6863/* Generate a DIE to represent a declared data object. */
6864static void
6865gen_variable_die (decl, context_die)
6866 register tree decl;
6867 register dw_die_ref context_die;
6868{
6869 register tree origin = decl_ultimate_origin (decl);
6870 register dw_die_ref var_die = new_die (DW_TAG_variable, context_die);
bdb669cb 6871 dw_die_ref old_die = lookup_decl_die (decl);
4edb7b60
JM		 6872 int declaration
6873 = (DECL_EXTERNAL (decl)
a94dbf2c
JM		 6874 || current_function_decl != decl_function_context (decl)
6875 || context_die->die_tag == DW_TAG_structure_type
6876 || context_die->die_tag == DW_TAG_union_type);
4edb7b60 6877
a3f97cbb
JW		 6878 if (origin != NULL)
6879 {
6880 add_abstract_origin_attribute (var_die, origin);
6881 }
bdb669cb
JM		 6882 else if (old_die)
6883 {
a94dbf2c 6884 assert (get_AT_flag (old_die, DW_AT_declaration) == 1);
bdb669cb
JM		 6885 add_AT_die_ref (var_die, DW_AT_specification, old_die);
6886 if (DECL_NAME (decl))
6887 {
6888 register unsigned file_index
6889 = lookup_filename (DECL_SOURCE_FILE (decl));
6890 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
6891 add_AT_unsigned (var_die, DW_AT_decl_file, file_index);
6892 if (get_AT_unsigned (old_die, DW_AT_decl_line)
6893 != DECL_SOURCE_LINE (decl))
6894 add_AT_unsigned
6895 (var_die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
6896 }
6897 }
a3f97cbb
JW		 6898 else
6899 {
6900 add_name_and_src_coords_attributes (var_die, decl);
a3f97cbb
JW		 6901 add_type_attribute (var_die, TREE_TYPE (decl),
6902 TREE_READONLY (decl),
6903 TREE_THIS_VOLATILE (decl), context_die);
273dbe67
JM		 6904 if (TREE_PUBLIC (decl))
6905 add_AT_flag (var_die, DW_AT_external, 1);
6906 if (DECL_ARTIFICIAL (decl))
6907 add_AT_flag (var_die, DW_AT_artificial, 1);
a94dbf2c
JM		 6908 if (TREE_PROTECTED (decl))
6909 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_protected);
6910 else if (TREE_PRIVATE (decl))
6911 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_private);
a3f97cbb 6912 }
4edb7b60
JM		 6913
6914 if (declaration)
6915 add_AT_flag (var_die, DW_AT_declaration, 1);
6916
6917 if ((declaration && decl_class_context (decl)) || DECL_ABSTRACT (decl))
6918 equate_decl_number_to_die (decl, var_die);
6919
6920 if (! declaration && ! DECL_ABSTRACT (decl))
a3f97cbb 6921 {
7e23cb16
JM		 6922 if (TREE_STATIC (decl))
6923 equate_decl_number_to_die (decl, var_die);
a3f97cbb 6924 add_location_or_const_value_attribute (var_die, decl);
d291dd49 6925 add_pubname (decl, var_die);
a3f97cbb
JW		 6926 }
6927}
6928
6929/* Generate a DIE to represent a label identifier. */
6930static void
6931gen_label_die (decl, context_die)
6932 register tree decl;
6933 register dw_die_ref context_die;
6934{
6935 register tree origin = decl_ultimate_origin (decl);
6936 register dw_die_ref lbl_die = new_die (DW_TAG_label, context_die);
6937 register rtx insn;
6938 char label[MAX_ARTIFICIAL_LABEL_BYTES];
5c90448c 6939 char label2[MAX_ARTIFICIAL_LABEL_BYTES];
a3f97cbb
JW		 6940 if (origin != NULL)
6941 {
6942 add_abstract_origin_attribute (lbl_die, origin);
6943 }
6944 else
6945 {
6946 add_name_and_src_coords_attributes (lbl_die, decl);
6947 }
6948 if (DECL_ABSTRACT (decl))
6949 {
6950 equate_decl_number_to_die (decl, lbl_die);
6951 }
6952 else
6953 {
6954 insn = DECL_RTL (decl);
6955 if (GET_CODE (insn) == CODE_LABEL)
6956 {
6957 /* When optimization is enabled (via -O) some parts of the compiler
6958 (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which
6959 represent source-level labels which were explicitly declared by
6960 the user. This really shouldn't be happening though, so catch
6961 it if it ever does happen. */
6962 if (INSN_DELETED_P (insn))
6963 {
6964 abort (); /* Should never happen. */
6965 }
5c90448c
JM		 6966 sprintf (label2, INSN_LABEL_FMT, current_funcdef_number);
6967 ASM_GENERATE_INTERNAL_LABEL (label, label2,
6968 (unsigned) INSN_UID (insn));
a3f97cbb
JW		 6969 add_AT_lbl_id (lbl_die, DW_AT_low_pc, label);
6970 }
6971 }
6972}
6973
6974/* Generate a DIE for a lexical block. */
6975static void
d7248bff 6976gen_lexical_block_die (stmt, context_die, depth)
a3f97cbb
JW		 6977 register tree stmt;
6978 register dw_die_ref context_die;
d7248bff 6979 int depth;
a3f97cbb
JW		 6980{
6981 register dw_die_ref stmt_die = new_die (DW_TAG_lexical_block, context_die);
6982 char label[MAX_ARTIFICIAL_LABEL_BYTES];
6983 if (!BLOCK_ABSTRACT (stmt))
6984 {
5c90448c
JM		 6985 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
6986 next_block_number);
a3f97cbb 6987 add_AT_lbl_id (stmt_die, DW_AT_low_pc, label);
5c90448c 6988 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, next_block_number);
a3f97cbb
JW		 6989 add_AT_lbl_id (stmt_die, DW_AT_high_pc, label);
6990 }
7d4440be 6991 push_decl_scope (stmt);
d7248bff 6992 decls_for_scope (stmt, stmt_die, depth);
7d4440be 6993 pop_decl_scope ();
a3f97cbb
JW		 6994}
6995
6996/* Generate a DIE for an inlined subprogram. */
6997static void
d7248bff 6998gen_inlined_subroutine_die (stmt, context_die, depth)
a3f97cbb
JW		 6999 register tree stmt;
7000 register dw_die_ref context_die;
d7248bff 7001 int depth;
a3f97cbb 7002{
a3f97cbb
JW		 7003 if (!BLOCK_ABSTRACT (stmt))
7004 {
d7248bff 7005 register dw_die_ref subr_die = new_die (DW_TAG_inlined_subroutine,
7e23cb16 7006 context_die);
ab72d377 7007 register tree decl = block_ultimate_origin (stmt);
d7248bff 7008 char label[MAX_ARTIFICIAL_LABEL_BYTES];
ab72d377 7009 add_abstract_origin_attribute (subr_die, decl);
5c90448c
JM		 7010 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
7011 next_block_number);
a3f97cbb 7012 add_AT_lbl_id (subr_die, DW_AT_low_pc, label);
5c90448c 7013 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, next_block_number);
a3f97cbb 7014 add_AT_lbl_id (subr_die, DW_AT_high_pc, label);
ab72d377 7015 push_decl_scope (decl);
d7248bff 7016 decls_for_scope (stmt, subr_die, depth);
ab72d377 7017 pop_decl_scope ();
7e23cb16 7018 current_function_has_inlines = 1;
a3f97cbb 7019 }
a3f97cbb
JW		 7020}
7021
7022/* Generate a DIE for a field in a record, or structure. */
7023static void
7024gen_field_die (decl, context_die)
7025 register tree decl;
7026 register dw_die_ref context_die;
7027{
7028 register dw_die_ref decl_die = new_die (DW_TAG_member, context_die);
7029 add_name_and_src_coords_attributes (decl_die, decl);
a3f97cbb
JW		 7030 add_type_attribute (decl_die, member_declared_type (decl),
7031 TREE_READONLY (decl), TREE_THIS_VOLATILE (decl),
7032 context_die);
7033 /* If this is a bit field... */
7034 if (DECL_BIT_FIELD_TYPE (decl))
7035 {
7036 add_byte_size_attribute (decl_die, decl);
7037 add_bit_size_attribute (decl_die, decl);
7038 add_bit_offset_attribute (decl_die, decl);
7039 }
a94dbf2c
JM		 7040 if (TREE_CODE (DECL_FIELD_CONTEXT (decl)) != UNION_TYPE)
7041 add_data_member_location_attribute (decl_die, decl);
273dbe67
JM		 7042 if (DECL_ARTIFICIAL (decl))
7043 add_AT_flag (decl_die, DW_AT_artificial, 1);
a94dbf2c
JM		 7044 if (TREE_PROTECTED (decl))
7045 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_protected);
7046 else if (TREE_PRIVATE (decl))
7047 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_private);
a3f97cbb
JW		 7048}
7049
ab72d377
JM		 7050#if 0
7051/* Don't generate either pointer_type DIEs or reference_type DIEs here.
7052 Use modified_type_die instead.
a3f97cbb
JW		 7053 We keep this code here just in case these types of DIEs may be needed to
7054 represent certain things in other languages (e.g. Pascal) someday. */
7055static void
7056gen_pointer_type_die (type, context_die)
7057 register tree type;
7058 register dw_die_ref context_die;
7059{
273dbe67
JM		 7060 register dw_die_ref ptr_die = new_die
7061 (DW_TAG_pointer_type, scope_die_for (type, context_die));
a3f97cbb 7062 equate_type_number_to_die (type, ptr_die);
a3f97cbb 7063 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
ab72d377 7064 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
a3f97cbb
JW		 7065}
7066
ab72d377
JM		 7067/* Don't generate either pointer_type DIEs or reference_type DIEs here.
7068 Use modified_type_die instead.
a3f97cbb
JW		 7069 We keep this code here just in case these types of DIEs may be needed to
7070 represent certain things in other languages (e.g. Pascal) someday. */
7071static void
7072gen_reference_type_die (type, context_die)
7073 register tree type;
7074 register dw_die_ref context_die;
7075{
273dbe67
JM		 7076 register dw_die_ref ref_die = new_die
7077 (DW_TAG_reference_type, scope_die_for (type, context_die));
a3f97cbb 7078 equate_type_number_to_die (type, ref_die);
a3f97cbb 7079 add_type_attribute (ref_die, TREE_TYPE (type), 0, 0, context_die);
ab72d377 7080 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
a3f97cbb 7081}
ab72d377 7082#endif
a3f97cbb
JW		 7083
7084/* Generate a DIE for a pointer to a member type. */
7085static void
7086gen_ptr_to_mbr_type_die (type, context_die)
7087 register tree type;
7088 register dw_die_ref context_die;
7089{
ab72d377 7090 register dw_die_ref ptr_die = new_die
273dbe67 7091 (DW_TAG_ptr_to_member_type, scope_die_for (type, context_die));
a3f97cbb 7092 equate_type_number_to_die (type, ptr_die);
a3f97cbb 7093 add_AT_die_ref (ptr_die, DW_AT_containing_type,
bdb669cb 7094 lookup_type_die (TYPE_OFFSET_BASETYPE (type)));
a3f97cbb
JW		 7095 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
7096}
7097
7098/* Generate the DIE for the compilation unit. */
7099static void
7100gen_compile_unit_die (main_input_filename)
7101 register char *main_input_filename;
7102{
7103 char producer[250];
a3f97cbb
JW		 7104 char *wd = getpwd ();
7105
7106 comp_unit_die = new_die (DW_TAG_compile_unit, NULL);
7107
bdb669cb
JM		 7108 add_name_attribute (comp_unit_die, main_input_filename);
7109
7110 if (wd)
a3f97cbb 7111 {
bdb669cb 7112 add_AT_string (comp_unit_die, DW_AT_comp_dir, wd);
a3f97cbb
JW		 7113 }
7114
7115 sprintf (producer, "%s %s", language_string, version_string);
7116
7117#ifdef MIPS_DEBUGGING_INFO
7118 /* The MIPS/SGI compilers place the 'cc' command line options in the producer
7119 string. The SGI debugger looks for -g, -g1, -g2, or -g3; if they do
7120 not appear in the producer string, the debugger reaches the conclusion
7121 that the object file is stripped and has no debugging information.
7122 To get the MIPS/SGI debugger to believe that there is debugging
7123 information in the object file, we add a -g to the producer string. */
4927276d
JM		 7124 if (debug_info_level > DINFO_LEVEL_TERSE)
7125 strcat (producer, " -g");
a3f97cbb
JW		 7126#endif
7127
7128 add_AT_string (comp_unit_die, DW_AT_producer, producer);
a9d38797 7129
a3f97cbb 7130 if (strcmp (language_string, "GNU C++") == 0)
a9d38797 7131 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C_plus_plus);
a3f97cbb 7132 else if (strcmp (language_string, "GNU Ada") == 0)
a9d38797
JM		 7133 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Ada83);
7134 else if (strcmp (language_string, "GNU F77") == 0)
7135 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Fortran77);
a3f97cbb 7136 else if (flag_traditional)
a9d38797 7137 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C);
a3f97cbb 7138 else
a9d38797
JM		 7139 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C89);
7140
7141#if 0 /* unimplemented */
e90b62db 7142 if (debug_info_level >= DINFO_LEVEL_VERBOSE)
a9d38797
JM		 7143 add_AT_unsigned (comp_unit_die, DW_AT_macro_info, 0);
7144#endif
a3f97cbb
JW		 7145}
7146
7147/* Generate a DIE for a string type. */
7148static void
7149gen_string_type_die (type, context_die)
7150 register tree type;
7151 register dw_die_ref context_die;
7152{
ab72d377
JM		 7153 register dw_die_ref type_die = new_die
7154 (DW_TAG_string_type, scope_die_for (type, context_die));
bdb669cb 7155 equate_type_number_to_die (type, type_die);
a3f97cbb
JW		 7156
7157 /* Fudge the string length attribute for now. */
7158
7159 /* TODO: add string length info.
7160 string_length_attribute (TYPE_MAX_VALUE (TYPE_DOMAIN (type)));
7161 bound_representation (upper_bound, 0, 'u'); */
7162}
7163
61b32c02
JM		 7164/* Generate the DIE for a base class. */
7165static void
7166gen_inheritance_die (binfo, context_die)
7167 register tree binfo;
7168 register dw_die_ref context_die;
7169{
7170 dw_die_ref die = new_die (DW_TAG_inheritance, context_die);
7171 add_type_attribute (die, BINFO_TYPE (binfo), 0, 0, context_die);
7172 add_data_member_location_attribute (die, binfo);
7173 if (TREE_VIA_VIRTUAL (binfo))
7174 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
7175 if (TREE_VIA_PUBLIC (binfo))
7176 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_public);
7177 else if (TREE_VIA_PROTECTED (binfo))
7178 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_protected);
7179}
7180
a3f97cbb
JW		 7181/* Genearate a DIE for a class member. */
7182static void
7183gen_member_die (type, context_die)
7184 register tree type;
7185 register dw_die_ref context_die;
7186{
61b32c02 7187 register tree member;
a3f97cbb
JW		 7188 /* If this is not an incomplete type, output descriptions of each of its
7189 members. Note that as we output the DIEs necessary to represent the
7190 members of this record or union type, we will also be trying to output
7191 DIEs to represent the *types* of those members. However the `type'
7192 function (above) will specifically avoid generating type DIEs for member
7193 types *within* the list of member DIEs for this (containing) type execpt
7194 for those types (of members) which are explicitly marked as also being
7195 members of this (containing) type themselves. The g++ front- end can
7196 force any given type to be treated as a member of some other
7197 (containing) type by setting the TYPE_CONTEXT of the given (member) type
7198 to point to the TREE node representing the appropriate (containing)
7199 type. */
7200
61b32c02
JM		 7201 /* First output info about the base classes. */
7202 if (TYPE_BINFO (type) && TYPE_BINFO_BASETYPES (type))
a3f97cbb 7203 {
61b32c02
JM		 7204 register tree bases = TYPE_BINFO_BASETYPES (type);
7205 register int n_bases = TREE_VEC_LENGTH (bases);
7206 register int i;
7207
7208 for (i = 0; i < n_bases; i++)
7209 gen_inheritance_die (TREE_VEC_ELT (bases, i), context_die);
a3f97cbb
JW		 7210 }
7211
61b32c02
JM		 7212 /* Now output info about the data members and type members. */
7213 for (member = TYPE_FIELDS (type); member; member = TREE_CHAIN (member))
7214 gen_decl_die (member, context_die);
7215
a3f97cbb 7216 /* Now output info about the function members (if any). */
61b32c02
JM		 7217 for (member = TYPE_METHODS (type); member; member = TREE_CHAIN (member))
7218 gen_decl_die (member, context_die);
a3f97cbb
JW		 7219}
7220
7221/* Generate a DIE for a structure or union type. */
7222static void
273dbe67 7223gen_struct_or_union_type_die (type, context_die)
a3f97cbb 7224 register tree type;
a3f97cbb
JW		 7225 register dw_die_ref context_die;
7226{
273dbe67 7227 register dw_die_ref type_die = lookup_type_die (type);
a082c85a
JM		 7228 register dw_die_ref scope_die = 0;
7229 register int nested = 0;
273dbe67
JM		 7230
7231 if (type_die && ! TYPE_SIZE (type))
7232 return;
a082c85a
JM		 7233
7234 if (TYPE_CONTEXT (type)
7235 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type))) == 't')
7236 nested = 1;
7237
a94dbf2c 7238 scope_die = scope_die_for (type, context_die);
a082c85a
JM		 7239
7240 if (! type_die || (nested && scope_die == comp_unit_die))
273dbe67 7241 /* First occurrence of type or toplevel definition of nested class. */
a3f97cbb 7242 {
273dbe67 7243 register dw_die_ref old_die = type_die;
a3f97cbb
JW		 7244 type_die = new_die (TREE_CODE (type) == RECORD_TYPE
7245 ? DW_TAG_structure_type : DW_TAG_union_type,
a082c85a 7246 scope_die);
a3f97cbb
JW		 7247 equate_type_number_to_die (type, type_die);
7248 add_name_attribute (type_die, type_tag (type));
273dbe67
JM		 7249 if (old_die)
7250 add_AT_die_ref (type_die, DW_AT_specification, old_die);
a3f97cbb 7251 }
4b674448 7252 else
273dbe67 7253 remove_AT (type_die, DW_AT_declaration);
a3f97cbb 7254
a94dbf2c
JM		 7255 /* If we're not in the right context to be defining this type, defer to
7256 avoid tricky recursion. */
7257 if (TYPE_SIZE (type) && decl_scope_depth > 0 && scope_die == comp_unit_die)
7258 {
7259 add_AT_flag (type_die, DW_AT_declaration, 1);
7260 pend_type (type);
7261 }
a3f97cbb
JW		 7262 /* If this type has been completed, then give it a byte_size attribute and
7263 then give a list of members. */
a94dbf2c 7264 else if (TYPE_SIZE (type))
a3f97cbb
JW		 7265 {
7266 /* Prevent infinite recursion in cases where the type of some member of
7267 this type is expressed in terms of this type itself. */
7268 TREE_ASM_WRITTEN (type) = 1;
273dbe67 7269 add_byte_size_attribute (type_die, type);
b2932ae5
JM		 7270 if (type_tag (type))
7271 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
273dbe67
JM		 7272 push_decl_scope (type);
7273 gen_member_die (type, type_die);
7274 pop_decl_scope ();
a94dbf2c
JM		 7275 /* GNU extension: Record what type our vtable lives in. */
7276 if (TYPE_VFIELD (type))
7277 {
7278 tree vtype = DECL_FCONTEXT (TYPE_VFIELD (type));
7279 gen_type_die (vtype, context_die);
7280 add_AT_die_ref (type_die, DW_AT_containing_type,
7281 lookup_type_die (vtype));
7282 }
a3f97cbb 7283 }
4b674448
JM		 7284 else
7285 add_AT_flag (type_die, DW_AT_declaration, 1);
a3f97cbb
JW		 7286}
7287
7288/* Generate a DIE for a subroutine _type_. */
7289static void
7290gen_subroutine_type_die (type, context_die)
7291 register tree type;
7292 register dw_die_ref context_die;
7293{
7294 register tree return_type = TREE_TYPE (type);
273dbe67
JM		 7295 register dw_die_ref subr_die = new_die
7296 (DW_TAG_subroutine_type, scope_die_for (type, context_die));
a3f97cbb
JW		 7297 equate_type_number_to_die (type, subr_die);
7298 add_prototyped_attribute (subr_die, type);
a3f97cbb 7299 add_type_attribute (subr_die, return_type, 0, 0, context_die);
a94dbf2c 7300 gen_formal_types_die (type, subr_die);
a3f97cbb
JW		 7301}
7302
7303/* Generate a DIE for a type definition */
7304static void
7305gen_typedef_die (decl, context_die)
7306 register tree decl;
7307 register dw_die_ref context_die;
7308{
a3f97cbb 7309 register dw_die_ref type_die;
a94dbf2c
JM		 7310 register tree origin;
7311
7312 if (TREE_ASM_WRITTEN (decl))
7313 return;
7314 TREE_ASM_WRITTEN (decl) = 1;
7315
ab72d377 7316 type_die = new_die (DW_TAG_typedef, scope_die_for (decl, context_die));
a94dbf2c 7317 origin = decl_ultimate_origin (decl);
a3f97cbb 7318 if (origin != NULL)
a94dbf2c 7319 add_abstract_origin_attribute (type_die, origin);
a3f97cbb
JW		 7320 else
7321 {
a94dbf2c 7322 register tree type;
a3f97cbb 7323 add_name_and_src_coords_attributes (type_die, decl);
a94dbf2c
JM		 7324 if (DECL_ORIGINAL_TYPE (decl))
7325 {
7326 type = DECL_ORIGINAL_TYPE (decl);
7327 equate_type_number_to_die (TREE_TYPE (decl), type_die);
7328 }
7329 else
7330 type = TREE_TYPE (decl);
7331 add_type_attribute (type_die, type, TREE_READONLY (decl),
7332 TREE_THIS_VOLATILE (decl), context_die);
a3f97cbb
JW		 7333 }
7334 if (DECL_ABSTRACT (decl))
a94dbf2c 7335 equate_decl_number_to_die (decl, type_die);
a3f97cbb
JW		 7336}
7337
7338/* Generate a type description DIE. */
7339static void
7340gen_type_die (type, context_die)
7341 register tree type;
7342 register dw_die_ref context_die;
7343{
a3f97cbb
JW		 7344 if (type == 0 || type == error_mark_node)
7345 {
7346 return;
7347 }
7348
7349 /* We are going to output a DIE to represent the unqualified version of of
7350 this type (i.e. without any const or volatile qualifiers) so get the
7351 main variant (i.e. the unqualified version) of this type now. */
7352 type = type_main_variant (type);
7353
7354 if (TREE_ASM_WRITTEN (type))
7355 {
7356 return;
7357 }
7358
a94dbf2c
JM		 7359 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7360 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
7361 {
7362 TREE_ASM_WRITTEN (type) = 1;
7363 gen_decl_die (TYPE_NAME (type), context_die);
7364 return;
7365 }
7366
a3f97cbb
JW		 7367 switch (TREE_CODE (type))
7368 {
7369 case ERROR_MARK:
7370 break;
7371
7372 case POINTER_TYPE:
7373 case REFERENCE_TYPE:
7374 /* For these types, all that is required is that we output a DIE (or a
7375 set of DIEs) to represent the "basis" type. */
7376 gen_type_die (TREE_TYPE (type), context_die);
7377 break;
7378
7379 case OFFSET_TYPE:
7380 /* This code is used for C++ pointer-to-data-member types. */
7381 /* Output a description of the relevant class type. */
7382 gen_type_die (TYPE_OFFSET_BASETYPE (type), context_die);
7383 /* Output a description of the type of the object pointed to. */
7384 gen_type_die (TREE_TYPE (type), context_die);
7385 /* Now output a DIE to represent this pointer-to-data-member type
7386 itself. */
7387 gen_ptr_to_mbr_type_die (type, context_die);
7388 break;
7389
7390 case SET_TYPE:
7391 gen_type_die (TYPE_DOMAIN (type), context_die);
7392 gen_set_type_die (type, context_die);
7393 break;
7394
7395 case FILE_TYPE:
7396 gen_type_die (TREE_TYPE (type), context_die);
7397 abort (); /* No way to represent these in Dwarf yet! */
7398 break;
7399
7400 case FUNCTION_TYPE:
7401 /* Force out return type (in case it wasn't forced out already). */
7402 gen_type_die (TREE_TYPE (type), context_die);
7403 gen_subroutine_type_die (type, context_die);
7404 break;
7405
7406 case METHOD_TYPE:
7407 /* Force out return type (in case it wasn't forced out already). */
7408 gen_type_die (TREE_TYPE (type), context_die);
7409 gen_subroutine_type_die (type, context_die);
7410 break;
7411
7412 case ARRAY_TYPE:
7413 if (TYPE_STRING_FLAG (type) && TREE_CODE (TREE_TYPE (type)) == CHAR_TYPE)
7414 {
7415 gen_type_die (TREE_TYPE (type), context_die);
7416 gen_string_type_die (type, context_die);
7417 }
7418 else
7419 {
7420 gen_array_type_die (type, context_die);
7421 }
7422 break;
7423
7424 case ENUMERAL_TYPE:
7425 case RECORD_TYPE:
7426 case UNION_TYPE:
7427 case QUAL_UNION_TYPE:
a082c85a
JM		 7428 /* If this is a nested type whose containing class hasn't been
7429 written out yet, writing it out will cover this one, too. */
7430 if (TYPE_CONTEXT (type)
7431 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type))) == 't'
7432 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
a94dbf2c
JM		 7433 {
7434 gen_type_die (TYPE_CONTEXT (type), context_die);
7435
7436 if (TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
7437 return;
7438
7439 /* If that failed, attach ourselves to the stub. */
7440 push_decl_scope (TYPE_CONTEXT (type));
7441 context_die = lookup_type_die (TYPE_CONTEXT (type));
7442 }
7443
7444 if (TREE_CODE (type) == ENUMERAL_TYPE)
273dbe67 7445 gen_enumeration_type_die (type, context_die);
a3f97cbb 7446 else
273dbe67 7447 gen_struct_or_union_type_die (type, context_die);
4b674448 7448
a94dbf2c
JM		 7449 if (TYPE_CONTEXT (type)
7450 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type))) == 't'
7451 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
7452 pop_decl_scope ();
7453
4b674448 7454 /* Don't set TREE_ASM_WRITTEN on an incomplete struct; we want to fix
a082c85a
JM		 7455 it up if it is ever completed. gen_*_type_die will set it for us
7456 when appropriate. */
7457 return;
a3f97cbb
JW		 7458
7459 case VOID_TYPE:
7460 case INTEGER_TYPE:
7461 case REAL_TYPE:
7462 case COMPLEX_TYPE:
7463 case BOOLEAN_TYPE:
7464 case CHAR_TYPE:
7465 /* No DIEs needed for fundamental types. */
7466 break;
7467
7468 case LANG_TYPE:
7469 /* No Dwarf representation currently defined. */
7470 break;
7471
7472 default:
7473 abort ();
7474 }
7475
7476 TREE_ASM_WRITTEN (type) = 1;
7477}
7478
7479/* Generate a DIE for a tagged type instantiation. */
7480static void
7481gen_tagged_type_instantiation_die (type, context_die)
7482 register tree type;
7483 register dw_die_ref context_die;
7484{
7485 if (type == 0 || type == error_mark_node)
7486 {
7487 return;
7488 }
7489
7490 /* We are going to output a DIE to represent the unqualified version of of
7491 this type (i.e. without any const or volatile qualifiers) so make sure
7492 that we have the main variant (i.e. the unqualified version) of this
7493 type now. */
7494 assert (type == type_main_variant (type));
7495 assert (TREE_ASM_WRITTEN (type));
7496
7497 switch (TREE_CODE (type))
7498 {
7499 case ERROR_MARK:
7500 break;
7501
7502 case ENUMERAL_TYPE:
7503 gen_inlined_enumeration_type_die (type, context_die);
7504 break;
7505
7506 case RECORD_TYPE:
7507 gen_inlined_structure_type_die (type, context_die);
7508 break;
7509
7510 case UNION_TYPE:
7511 case QUAL_UNION_TYPE:
7512 gen_inlined_union_type_die (type, context_die);
7513 break;
7514
7515 default:
7516 abort (); /* Should never happen. */
7517 }
7518}
7519
7520/* Generate a DW_TAG_lexical_block DIE followed by DIEs to represent all of the
7521 things which are local to the given block. */
7522static void
d7248bff 7523gen_block_die (stmt, context_die, depth)
a3f97cbb
JW		 7524 register tree stmt;
7525 register dw_die_ref context_die;
d7248bff 7526 int depth;
a3f97cbb
JW		 7527{
7528 register int must_output_die = 0;
7529 register tree origin;
7530 register tree decl;
7531 register enum tree_code origin_code;
7532
7533 /* Ignore blocks never really used to make RTL. */
7534
7535 if (!stmt || !TREE_USED (stmt))
7536 {
7537 return;
7538 }
7539
7540 /* Determine the "ultimate origin" of this block. This block may be an
7541 inlined instance of an inlined instance of inline function, so we have
7542 to trace all of the way back through the origin chain to find out what
7543 sort of node actually served as the original seed for the creation of
7544 the current block. */
7545 origin = block_ultimate_origin (stmt);
7546 origin_code = (origin != NULL) ? TREE_CODE (origin) : ERROR_MARK;
7547
7548 /* Determine if we need to output any Dwarf DIEs at all to represent this
7549 block. */
7550 if (origin_code == FUNCTION_DECL)
7551 {
7552 /* The outer scopes for inlinings *must* always be represented. We
7553 generate DW_TAG_inlined_subroutine DIEs for them. (See below.) */
7554 must_output_die = 1;
7555 }
7556 else
7557 {
7558 /* In the case where the current block represents an inlining of the
7559 "body block" of an inline function, we must *NOT* output any DIE for
7560 this block because we have already output a DIE to represent the
7561 whole inlined function scope and the "body block" of any function
7562 doesn't really represent a different scope according to ANSI C
7563 rules. So we check here to make sure that this block does not
7564 represent a "body block inlining" before trying to set the
7565 `must_output_die' flag. */
d7248bff 7566 if (! is_body_block (origin ? origin : stmt))
a3f97cbb
JW		 7567 {
7568 /* Determine if this block directly contains any "significant"
7569 local declarations which we will need to output DIEs for. */
7570 if (debug_info_level > DINFO_LEVEL_TERSE)
7571 {
7572 /* We are not in terse mode so *any* local declaration counts
7573 as being a "significant" one. */
7574 must_output_die = (BLOCK_VARS (stmt) != NULL);
7575 }
7576 else
7577 {
7578 /* We are in terse mode, so only local (nested) function
7579 definitions count as "significant" local declarations. */
7580 for (decl = BLOCK_VARS (stmt);
7581 decl != NULL; decl = TREE_CHAIN (decl))
7582 {
7583 if (TREE_CODE (decl) == FUNCTION_DECL
7584 && DECL_INITIAL (decl))
7585 {
7586 must_output_die = 1;
7587 break;
7588 }
7589 }
7590 }
7591 }
7592 }
7593
7594 /* It would be a waste of space to generate a Dwarf DW_TAG_lexical_block
7595 DIE for any block which contains no significant local declarations at
7596 all. Rather, in such cases we just call `decls_for_scope' so that any
7597 needed Dwarf info for any sub-blocks will get properly generated. Note
7598 that in terse mode, our definition of what constitutes a "significant"
7599 local declaration gets restricted to include only inlined function
7600 instances and local (nested) function definitions. */
7601 if (must_output_die)
7602 {
7603 if (origin_code == FUNCTION_DECL)
7604 {
d7248bff 7605 gen_inlined_subroutine_die (stmt, context_die, depth);
a3f97cbb
JW		 7606 }
7607 else
7608 {
d7248bff 7609 gen_lexical_block_die (stmt, context_die, depth);
a3f97cbb
JW		 7610 }
7611 }
7612 else
d7248bff 7613 decls_for_scope (stmt, context_die, depth);
a3f97cbb
JW		 7614}
7615
7616/* Generate all of the decls declared within a given scope and (recursively)
7617 all of it's sub-blocks. */
7618static void
d7248bff 7619decls_for_scope (stmt, context_die, depth)
a3f97cbb
JW		 7620 register tree stmt;
7621 register dw_die_ref context_die;
d7248bff 7622 int depth;
a3f97cbb
JW		 7623{
7624 register tree decl;
7625 register tree subblocks;
7626 /* Ignore blocks never really used to make RTL. */
7627 if (!stmt || !TREE_USED (stmt))
7628 {
7629 return;
7630 }
d7248bff 7631 if (!BLOCK_ABSTRACT (stmt) && depth > 0)
a3f97cbb
JW		 7632 {
7633 next_block_number++;
7634 }
7635
88dad228
JM		 7636 /* Output the DIEs to represent all of the data objects and typedefs
7637 declared directly within this block but not within any nested
7638 sub-blocks. Also, nested function and tag DIEs have been
7639 generated with a parent of NULL; fix that up now. */
a3f97cbb
JW		 7640 for (decl = BLOCK_VARS (stmt);
7641 decl != NULL; decl = TREE_CHAIN (decl))
7642 {
a94dbf2c
JM		 7643 register dw_die_ref die;
7644
88dad228 7645 if (TREE_CODE (decl) == FUNCTION_DECL)
a94dbf2c 7646 die = lookup_decl_die (decl);
88dad228 7647 else if (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl))
a94dbf2c
JM		 7648 die = lookup_type_die (TREE_TYPE (decl));
7649 else
7650 die = NULL;
7651
7652 if (die && die->die_parent == NULL)
88dad228 7653 {
a94dbf2c
JM		 7654 add_child_die (context_die, die);
7655 --limbo_die_count;
88dad228
JM		 7656 }
7657 else
7658 gen_decl_die (decl, context_die);
a3f97cbb
JW		 7659 }
7660
7661 /* Output the DIEs to represent all sub-blocks (and the items declared
7662 therein) of this block. */
7663 for (subblocks = BLOCK_SUBBLOCKS (stmt);
7664 subblocks != NULL;
7665 subblocks = BLOCK_CHAIN (subblocks))
7666 {
d7248bff 7667 gen_block_die (subblocks, context_die, depth + 1);
a3f97cbb
JW		 7668 }
7669}
7670
a94dbf2c
JM		 7671/* Is this a typedef we can avoid emitting? */
7672inline int
7673is_redundant_typedef (decl)
7674 register tree decl;
7675{
7676 if (TYPE_DECL_IS_STUB (decl))
7677 return 1;
7678 if (DECL_ARTIFICIAL (decl)
7679 && DECL_CONTEXT (decl)
7680 && is_tagged_type (DECL_CONTEXT (decl))
7681 && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl))) == TYPE_DECL
7682 && DECL_NAME (decl) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl))))
7683 /* Also ignore the artificial member typedef for the class name. */
7684 return 1;
7685 return 0;
7686}
7687
a3f97cbb
JW		 7688/* Generate Dwarf debug information for a decl described by DECL. */
7689static void
7690gen_decl_die (decl, context_die)
7691 register tree decl;
7692 register dw_die_ref context_die;
7693{
7694 register tree origin;
7695 /* Make a note of the decl node we are going to be working on. We may need
7696 to give the user the source coordinates of where it appeared in case we
7697 notice (later on) that something about it looks screwy. */
7698 dwarf_last_decl = decl;
7699
7700 if (TREE_CODE (decl) == ERROR_MARK)
7701 {
7702 return;
7703 }
7704
7705 /* If this ..._DECL node is marked to be ignored, then ignore it. But don't
7706 ignore a function definition, since that would screw up our count of
7707 blocks, and that it turn will completely screw up the the labels we will
7708 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
7709 subsequent blocks). */
7710 if (DECL_IGNORED_P (decl) && TREE_CODE (decl) != FUNCTION_DECL)
7711 {
7712 return;
7713 }
7714
a3f97cbb
JW		 7715 switch (TREE_CODE (decl))
7716 {
7717 case CONST_DECL:
7718 /* The individual enumerators of an enum type get output when we output
7719 the Dwarf representation of the relevant enum type itself. */
7720 break;
7721
7722 case FUNCTION_DECL:
4edb7b60
JM		 7723 /* Don't output any DIEs to represent mere function declarations,
7724 unless they are class members or explicit block externs. */
7725 if (DECL_INITIAL (decl) == NULL_TREE && DECL_CONTEXT (decl) == NULL_TREE
7726 && (current_function_decl == NULL_TREE || ! DECL_ARTIFICIAL (decl)))
a3f97cbb
JW		 7727 {
7728 break;
7729 }
bdb669cb 7730
4927276d 7731 if (debug_info_level > DINFO_LEVEL_TERSE)
a94dbf2c
JM		 7732 {
7733 /* Before we describe the FUNCTION_DECL itself, make sure that we
7734 have described its return type. */
7735 gen_type_die (TREE_TYPE (TREE_TYPE (decl)), context_die);
7736
7737 /* And its containing type. */
7738 origin = decl_class_context (decl);
7739 if (origin)
7740 gen_type_die (origin, context_die);
7741
7742 /* And its virtual context. */
7743 if (DECL_VINDEX (decl))
7744 gen_type_die (DECL_CONTEXT (decl), context_die);
7745 }
a3f97cbb
JW		 7746
7747 /* Now output a DIE to represent the function itself. */
7748 gen_subprogram_die (decl, context_die);
7749 break;
7750
7751 case TYPE_DECL:
7752 /* If we are in terse mode, don't generate any DIEs to represent any
4927276d 7753 actual typedefs. */
a3f97cbb 7754 if (debug_info_level <= DINFO_LEVEL_TERSE)
4927276d 7755 break;
a3f97cbb 7756
5c90448c
JM		 7757 /* In the special case of a TYPE_DECL node representing the
7758 declaration of some type tag, if the given TYPE_DECL is marked as
a3f97cbb
JW		 7759 having been instantiated from some other (original) TYPE_DECL node
7760 (e.g. one which was generated within the original definition of an
7761 inline function) we have to generate a special (abbreviated)
7762 DW_TAG_structure_type, DW_TAG_union_type, or DW_TAG_enumeration-type
7763 DIE here. */
5c90448c 7764 if (TYPE_DECL_IS_STUB (decl) && DECL_ABSTRACT_ORIGIN (decl))
a3f97cbb
JW		 7765 {
7766 gen_tagged_type_instantiation_die (TREE_TYPE (decl), context_die);
7767 break;
7768 }
a3f97cbb 7769
a94dbf2c
JM		 7770 if (is_redundant_typedef (decl))
7771 gen_type_die (TREE_TYPE (decl), context_die);
7772 else
a3f97cbb
JW		 7773 {
7774 /* Output a DIE to represent the typedef itself. */
7775 gen_typedef_die (decl, context_die);
7776 }
7777 break;
7778
7779 case LABEL_DECL:
7780 if (debug_info_level >= DINFO_LEVEL_NORMAL)
7781 {
7782 gen_label_die (decl, context_die);
7783 }
7784 break;
7785
7786 case VAR_DECL:
7787 /* If we are in terse mode, don't generate any DIEs to represent any
7788 variable declarations or definitions. */
7789 if (debug_info_level <= DINFO_LEVEL_TERSE)
7790 {
7791 break;
7792 }
7793
7794 /* Output any DIEs that are needed to specify the type of this data
7795 object. */
7796 gen_type_die (TREE_TYPE (decl), context_die);
7797
a94dbf2c
JM		 7798 /* And its containing type. */
7799 origin = decl_class_context (decl);
7800 if (origin)
7801 gen_type_die (origin, context_die);
7802
a3f97cbb
JW		 7803 /* Now output the DIE to represent the data object itself. This gets
7804 complicated because of the possibility that the VAR_DECL really
7805 represents an inlined instance of a formal parameter for an inline
7806 function. */
7807 origin = decl_ultimate_origin (decl);
7808 if (origin != NULL && TREE_CODE (origin) == PARM_DECL)
7809 {
7810 gen_formal_parameter_die (decl, context_die);
7811 }
7812 else
7813 {
7814 gen_variable_die (decl, context_die);
7815 }
7816 break;
7817
7818 case FIELD_DECL:
a94dbf2c
JM		 7819 /* Ignore the nameless fields that are used to skip bits, but
7820 handle C++ anonymous unions. */
7821 if (DECL_NAME (decl) != 0 || TREE_CODE (TREE_TYPE (decl)) == UNION_TYPE)
a3f97cbb
JW		 7822 {
7823 gen_type_die (member_declared_type (decl), context_die);
7824 gen_field_die (decl, context_die);
7825 }
7826 break;
7827
7828 case PARM_DECL:
7829 gen_type_die (TREE_TYPE (decl), context_die);
7830 gen_formal_parameter_die (decl, context_die);
7831 break;
7832
7833 default:
7834 abort ();
7835 }
a3f97cbb
JW		 7836}
7837\f
7838/***************** Debug Information Generation Hooks ***********************/
7839void
88dad228 7840dwarf2out_decl (decl)
a3f97cbb 7841 register tree decl;
a3f97cbb 7842{
88dad228
JM		 7843 register dw_die_ref context_die = comp_unit_die;
7844
a3f97cbb
JW		 7845 if (TREE_CODE (decl) == ERROR_MARK)
7846 {
7847 return;
7848 }
7849
7850 /* If this ..._DECL node is marked to be ignored, then ignore it. We gotta
7851 hope that the node in question doesn't represent a function definition.
7852 If it does, then totally ignoring it is bound to screw up our count of
7853 blocks, and that it turn will completely screw up the the labels we will
7854 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
7855 subsequent blocks). (It's too bad that BLOCK nodes don't carry their
7856 own sequence numbers with them!) */
7857 if (DECL_IGNORED_P (decl))
7858 {
7859 if (TREE_CODE (decl) == FUNCTION_DECL
7860 && DECL_INITIAL (decl) != NULL)
7861 {
7862 abort ();
7863 }
7864 return;
7865 }
7866
7867 switch (TREE_CODE (decl))
7868 {
7869 case FUNCTION_DECL:
7870 /* Ignore this FUNCTION_DECL if it refers to a builtin declaration of a
7871 builtin function. Explicit programmer-supplied declarations of
7872 these same functions should NOT be ignored however. */
7873 if (DECL_EXTERNAL (decl) && DECL_FUNCTION_CODE (decl))
7874 {
7875 return;
7876 }
7877
7878 /* What we would really like to do here is to filter out all mere
7879 file-scope declarations of file-scope functions which are never
7880 referenced later within this translation unit (and keep all of ones
7881 that *are* referenced later on) but we aren't clarvoiant, so we have
7882 no idea which functions will be referenced in the future (i.e. later
7883 on within the current translation unit). So here we just ignore all
7884 file-scope function declarations which are not also definitions. If
7885 and when the debugger needs to know something about these funcstion,
7886 it wil have to hunt around and find the DWARF information associated
7887 with the definition of the function. Note that we can't just check
7888 `DECL_EXTERNAL' to find out which FUNCTION_DECL nodes represent
7889 definitions and which ones represent mere declarations. We have to
7890 check `DECL_INITIAL' instead. That's because the C front-end
7891 supports some weird semantics for "extern inline" function
7892 definitions. These can get inlined within the current translation
7893 unit (an thus, we need to generate DWARF info for their abstract
7894 instances so that the DWARF info for the concrete inlined instances
7895 can have something to refer to) but the compiler never generates any
7896 out-of-lines instances of such things (despite the fact that they
7897 *are* definitions). The important point is that the C front-end
7898 marks these "extern inline" functions as DECL_EXTERNAL, but we need
273dbe67 7899 to generate DWARF for them anyway. Note that the C++ front-end also
a3f97cbb
JW		 7900 plays some similar games for inline function definitions appearing
7901 within include files which also contain
7902 `#pragma interface' pragmas. */
7903 if (DECL_INITIAL (decl) == NULL_TREE)
7904 {
7905 return;
7906 }
88dad228
JM		 7907
7908 /* If we're a nested function, initially use a parent of NULL; if we're
7909 a plain function, this will be fixed up in decls_for_scope. If
7910 we're a method, it will be ignored, since we already have a DIE. */
7911 if (decl_function_context (decl))
7912 context_die = NULL;
7913
a3f97cbb
JW		 7914 break;
7915
7916 case VAR_DECL:
7917 /* Ignore this VAR_DECL if it refers to a file-scope extern data object
7918 declaration and if the declaration was never even referenced from
7919 within this entire compilation unit. We suppress these DIEs in
7920 order to save space in the .debug section (by eliminating entries
7921 which are probably useless). Note that we must not suppress
7922 block-local extern declarations (whether used or not) because that
7923 would screw-up the debugger's name lookup mechanism and cause it to
7924 miss things which really ought to be in scope at a given point. */
7925 if (DECL_EXTERNAL (decl) && !TREE_USED (decl))
7926 {
7927 return;
7928 }
7929
7930 /* If we are in terse mode, don't generate any DIEs to represent any
7931 variable declarations or definitions. */
7932 if (debug_info_level <= DINFO_LEVEL_TERSE)
7933 {
7934 return;
7935 }
7936 break;
7937
7938 case TYPE_DECL:
7939 /* Don't bother trying to generate any DIEs to represent any of the
a9d38797
JM		 7940 normal built-in types for the language we are compiling. */
7941 if (DECL_SOURCE_LINE (decl) == 0)
a94dbf2c
JM		 7942 {
7943 /* OK, we need to generate one for `bool' so GDB knows what type
7944 comparisons have. */
7945 if ((get_AT_unsigned (comp_unit_die, DW_AT_language)
7946 == DW_LANG_C_plus_plus)
7947 && TREE_CODE (TREE_TYPE (decl)) == BOOLEAN_TYPE)
7948 modified_type_die (TREE_TYPE (decl), 0, 0, NULL);
7949 return;
7950 }
a3f97cbb 7951
88dad228 7952 /* If we are in terse mode, don't generate any DIEs for types. */
a3f97cbb 7953 if (debug_info_level <= DINFO_LEVEL_TERSE)
4927276d 7954 return;
88dad228
JM		 7955
7956 /* If we're a function-scope tag, initially use a parent of NULL;
7957 this will be fixed up in decls_for_scope. */
7958 if (decl_function_context (decl))
7959 context_die = NULL;
7960
a3f97cbb
JW		 7961 break;
7962
7963 default:
7964 return;
7965 }
7966
88dad228 7967 gen_decl_die (decl, context_die);
a94dbf2c 7968 output_pending_types_for_scope (comp_unit_die);
a3f97cbb
JW		 7969
7970 if (TREE_CODE (decl) == FUNCTION_DECL
7971 && DECL_INITIAL (decl) != NULL)
7972 {
7973 current_funcdef_number++;
7974 }
7975
7976}
7977
7978/* Output a marker (i.e. a label) for the beginning of the generated code for
7979 a lexical block. */
7980void
9a666dda 7981dwarf2out_begin_block (blocknum)
a3f97cbb
JW		 7982 register unsigned blocknum;
7983{
a3f97cbb 7984 function_section (current_function_decl);
5c90448c 7985 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_BEGIN_LABEL, blocknum);
a3f97cbb
JW		 7986}
7987
7988/* Output a marker (i.e. a label) for the end of the generated code for a
7989 lexical block. */
7990void
9a666dda 7991dwarf2out_end_block (blocknum)
a3f97cbb
JW		 7992 register unsigned blocknum;
7993{
a3f97cbb 7994 function_section (current_function_decl);
5c90448c 7995 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_END_LABEL, blocknum);
a3f97cbb
JW		 7996}
7997
7998/* Output a marker (i.e. a label) at a point in the assembly code which
7999 corresponds to a given source level label. */
8000void
9a666dda 8001dwarf2out_label (insn)
a3f97cbb
JW		 8002 register rtx insn;
8003{
8004 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8005 if (debug_info_level >= DINFO_LEVEL_NORMAL)
8006 {
8007 function_section (current_function_decl);
5c90448c
JM		 8008 sprintf (label, INSN_LABEL_FMT, current_funcdef_number);
8009 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, label,
8010 (unsigned) INSN_UID (insn));
a3f97cbb
JW		 8011 }
8012}
8013
d291dd49
JM		 8014/* Output a marker (i.e. a label) for the beginning of a function, before
8015 the prologue. */
a3f97cbb 8016void
9a666dda 8017dwarf2out_begin_prologue ()
a3f97cbb
JW		 8018{
8019 char label[MAX_ARTIFICIAL_LABEL_BYTES];
a3f97cbb 8020 register dw_fde_ref fde;
a3f97cbb
JW		 8021
8022 function_section (current_function_decl);
5c90448c
JM		 8023 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_BEGIN_LABEL,
8024 current_funcdef_number);
a3f97cbb
JW		 8025 ASM_OUTPUT_LABEL (asm_out_file, label);
8026
8027 /* Expand the fde table if necessary. */
8028 if (fde_table_in_use == fde_table_allocated)
8029 {
8030 fde_table_allocated += FDE_TABLE_INCREMENT;
8031 fde_table = (dw_fde_ref) xrealloc (fde_table,
8032 fde_table_allocated * sizeof (dw_fde_node));
8033 }
8034
8035 /* Record the FDE associated with this function. */
8036 current_funcdef_fde = fde_table_in_use;
8037
8038 /* Add the new FDE at the end of the fde_table. */
8039 fde = &fde_table[fde_table_in_use++];
7d4440be 8040 fde->dw_fde_begin = xstrdup (label);
a94dbf2c 8041 fde->dw_fde_current_label = NULL;
a3f97cbb
JW		 8042 fde->dw_fde_end = NULL;
8043 fde->dw_fde_cfi = NULL;
d291dd49
JM		 8044}
8045
8046/* Output a marker (i.e. a label) for the point in the generated code where
8047 the real body of the function begins (after parameters have been moved to
8048 their home locations). */
8049void
9a666dda 8050dwarf2out_begin_function ()
d291dd49 8051{
a94dbf2c 8052#ifdef MIPS_DEBUGGING_INFO
d291dd49
JM		 8053 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8054 register long int offset;
8055 register dw_fde_ref fde;
8056 register dw_cfi_ref cfi;
a94dbf2c 8057 register int regno, fp_inc;
d291dd49
JM		 8058
8059 function_section (current_function_decl);
5c90448c
JM		 8060 ASM_GENERATE_INTERNAL_LABEL (label, BODY_BEGIN_LABEL,
8061 current_funcdef_number);
d291dd49
JM		 8062 ASM_OUTPUT_LABEL (asm_out_file, label);
8063
c8cc5c4a
JM		 8064 /* Define the CFA as an offset from either the frame pointer
8065 or the stack pointer. */
a94dbf2c
JM		 8066 dwarf2out_def_cfa
8067 (label, gen_rtx (PLUS, VOIDmode,
8068 gen_rtx (REG, VOIDmode,
8069 (frame_pointer_needed ? FRAME_POINTER_REGNUM
8070 : STACK_POINTER_REGNUM)),
8071 GEN_INT (current_frame_info.total_size)));
8072
8073 /* Record the locations of the return address and any callee-saved regs. */
8074 offset = current_frame_info.gp_save_offset / DWARF_CIE_DATA_ALIGNMENT;
8075 for (regno = GP_REG_LAST; regno >= GP_REG_FIRST; --regno)
8076 if (current_frame_info.mask & (1<<regno))
8077 {
8078 assert (offset >= 0);
a3f97cbb 8079
a94dbf2c
JM		 8080 if (regno == 31)
8081 dwarf2out_return_save (label, GEN_INT (offset));
8082 else
8083 dwarf2out_reg_save (label, regno, GEN_INT (offset));
8084 offset -= UNITS_PER_WORD / DWARF_CIE_DATA_ALIGNMENT;
8085 }
a3f97cbb 8086
a94dbf2c
JM		 8087 fp_inc = (TARGET_FLOAT64 || TARGET_SINGLE_FLOAT) ? 1 : 2;
8088 offset = current_frame_info.fp_save_offset / DWARF_CIE_DATA_ALIGNMENT;
8089 for (regno = FP_REG_LAST - 1; regno >= FP_REG_FIRST; regno -= fp_inc)
8090 if (current_frame_info.fmask & (1 << (regno - FP_REG_FIRST)))
8091 {
8092 assert (offset >= 0);
8093 dwarf2out_reg_save (label, regno, GEN_INT (offset));
8094 offset -= (fp_inc * UNITS_PER_FPREG) / DWARF_CIE_DATA_ALIGNMENT;
8095 }
a3f97cbb 8096#endif
a3f97cbb
JW		 8097}
8098
8099/* Output a marker (i.e. a label) for the absolute end of the generated code
8100 for a function definition. This gets called *after* the epilogue code has
8101 been generated. */
8102void
9a666dda 8103dwarf2out_end_epilogue ()
a3f97cbb
JW		 8104{
8105 dw_fde_ref fde;
8106 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8107 /* Output a label to mark the endpoint of the code generated for this
8108 function. */
5c90448c 8109 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_END_LABEL, current_funcdef_number);
a3f97cbb
JW		 8110 ASM_OUTPUT_LABEL (asm_out_file, label);
8111 fde = &fde_table[fde_table_in_use - 1];
8112 fde->dw_fde_end = xstrdup (label);
8113}
8114
8115/* Lookup a filename (in the list of filenames that we know about here in
9a666dda 8116 dwarf2out.c) and return its "index". The index of each (known) filename is
a3f97cbb
JW		 8117 just a unique number which is associated with only that one filename.
8118 We need such numbers for the sake of generating labels
8119 (in the .debug_sfnames section) and references to those
8120 files numbers (in the .debug_srcinfo and.debug_macinfo sections).
8121 If the filename given as an argument is not found in our current list,
8122 add it to the list and assign it the next available unique index number.
8123 In order to speed up searches, we remember the index of the filename
8124 was looked up last. This handles the majority of all searches. */
8125static unsigned
8126lookup_filename (file_name)
8127 char *file_name;
8128{
8129 static unsigned last_file_lookup_index = 0;
8130 register char *fn;
8131 register unsigned i;
8132
8133 /* Check to see if the file name that was searched on the previous call
8134 matches this file name. If so, return the index. */
8135 if (last_file_lookup_index != 0)
8136 {
8137 fn = file_table[last_file_lookup_index];
8138 if (strcmp (file_name, fn) == 0)
8139 {
8140 return last_file_lookup_index;
8141 }
8142 }
8143
8144 /* Didn't match the previous lookup, search the table */
8145 for (i = 1; i < file_table_in_use; ++i)
8146 {
8147 fn = file_table[i];
8148 if (strcmp (file_name, fn) == 0)
8149 {
8150 last_file_lookup_index = i;
8151 return i;
8152 }
8153 }
8154
8155 /* Prepare to add a new table entry by making sure there is enough space in
8156 the table to do so. If not, expand the current table. */
8157 if (file_table_in_use == file_table_allocated)
8158 {
8159 file_table_allocated += FILE_TABLE_INCREMENT;
8160 file_table
8161 = (char **)
8162 xrealloc (file_table, file_table_allocated * sizeof (char *));
8163 }
8164
8165 /* add the new entry to the end of the filename table. */
8166 file_table[file_table_in_use] = xstrdup (file_name);
8167 last_file_lookup_index = file_table_in_use++;
8168 return last_file_lookup_index;
8169}
8170
8171/* Output a label to mark the beginning of a source code line entry
8172 and record information relating to this source line, in
8173 'line_info_table' for later output of the .debug_line section. */
8174void
9a666dda 8175dwarf2out_line (filename, line)
a3f97cbb
JW		 8176 register char *filename;
8177 register unsigned line;
8178{
a3f97cbb
JW		 8179 if (debug_info_level >= DINFO_LEVEL_NORMAL)
8180 {
8181 function_section (current_function_decl);
a3f97cbb 8182
e90b62db 8183 if (DECL_SECTION_NAME (current_function_decl))
a3f97cbb 8184 {
e90b62db 8185 register dw_separate_line_info_ref line_info;
5c90448c
JM		 8186 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, SEPARATE_LINE_CODE_LABEL,
8187 separate_line_info_table_in_use);
e90b62db
JM		 8188 fputc ('\n', asm_out_file);
8189
8190 /* expand the line info table if necessary */
8191 if (separate_line_info_table_in_use
8192 == separate_line_info_table_allocated)
8193 {
8194 separate_line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
8195 separate_line_info_table
8196 = (dw_separate_line_info_ref) xrealloc
8197 (separate_line_info_table,
8198 separate_line_info_table_allocated
8199 * sizeof (dw_separate_line_info_entry));
8200 }
8201 /* add the new entry at the end of the line_info_table. */
8202 line_info
8203 = &separate_line_info_table[separate_line_info_table_in_use++];
8204 line_info->dw_file_num = lookup_filename (filename);
8205 line_info->dw_line_num = line;
8206 line_info->function = current_funcdef_number;
8207 }
8208 else
8209 {
8210 register dw_line_info_ref line_info;
5c90448c
JM		 8211 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, LINE_CODE_LABEL,
8212 line_info_table_in_use);
e90b62db
JM		 8213 fputc ('\n', asm_out_file);
8214
8215 /* expand the line info table if necessary */
8216 if (line_info_table_in_use == line_info_table_allocated)
8217 {
8218 line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
8219 line_info_table
8220 = (dw_line_info_ref) xrealloc
8221 (line_info_table,
8222 line_info_table_allocated * sizeof (dw_line_info_entry));
8223 }
8224 /* add the new entry at the end of the line_info_table. */
8225 line_info = &line_info_table[line_info_table_in_use++];
8226 line_info->dw_file_num = lookup_filename (filename);
8227 line_info->dw_line_num = line;
a3f97cbb 8228 }
a3f97cbb
JW		 8229 }
8230}
8231
8232/* Record the beginning of a new source file, for later output
8233 of the .debug_macinfo section. At present, unimplemented. */
8234void
9a666dda 8235dwarf2out_start_source_file (filename)
a3f97cbb
JW		 8236 register char *filename;
8237{
8238}
8239
9a666dda 8240/* Record the end of a source file, for later output
a3f97cbb
JW		 8241 of the .debug_macinfo section. At present, unimplemented. */
8242void
9a666dda 8243dwarf2out_end_source_file ()
a3f97cbb
JW		 8244{
8245}
8246
8247/* Called from check_newline in c-parse.y. The `buffer' parameter contains
8248 the tail part of the directive line, i.e. the part which is past the
8249 initial whitespace, #, whitespace, directive-name, whitespace part. */
8250void
9a666dda 8251dwarf2out_define (lineno, buffer)
a3f97cbb
JW		 8252 register unsigned lineno;
8253 register char *buffer;
8254{
8255 static int initialized = 0;
8256 if (!initialized)
8257 {
9a666dda 8258 dwarf2out_start_source_file (primary_filename);
a3f97cbb
JW		 8259 initialized = 1;
8260 }
8261}
8262
8263/* Called from check_newline in c-parse.y. The `buffer' parameter contains
8264 the tail part of the directive line, i.e. the part which is past the
8265 initial whitespace, #, whitespace, directive-name, whitespace part. */
8266void
9a666dda 8267dwarf2out_undef (lineno, buffer)
a3f97cbb
JW		 8268 register unsigned lineno;
8269 register char *buffer;
8270{
8271}
8272
8273/* Set up for Dwarf output at the start of compilation. */
8274void
9a666dda 8275dwarf2out_init (asm_out_file, main_input_filename)
a3f97cbb
JW		 8276 register FILE *asm_out_file;
8277 register char *main_input_filename;
8278{
a3f97cbb
JW		 8279 /* Remember the name of the primary input file. */
8280 primary_filename = main_input_filename;
8281
8282 /* Allocate the initial hunk of the file_table. */
8283 file_table = (char **) xmalloc (FILE_TABLE_INCREMENT * sizeof (char *));
8284 bzero (file_table, FILE_TABLE_INCREMENT * sizeof (char *));
8285 file_table_allocated = FILE_TABLE_INCREMENT;
8286 /* skip the first entry - file numbers begin at 1 */
8287 file_table_in_use = 1;
8288
a3f97cbb
JW		 8289 /* Allocate the initial hunk of the decl_die_table. */
8290 decl_die_table
8291 = (dw_die_ref *) xmalloc (DECL_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
8292 bzero (decl_die_table, DECL_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
8293 decl_die_table_allocated = DECL_DIE_TABLE_INCREMENT;
8294 decl_die_table_in_use = 0;
8295
8296 /* Allocate the initial hunk of the decl_scope_table. */
8297 decl_scope_table
8298 = (tree *) xmalloc (DECL_SCOPE_TABLE_INCREMENT * sizeof (tree));
8299 bzero (decl_scope_table, DECL_SCOPE_TABLE_INCREMENT * sizeof (tree));
8300 decl_scope_table_allocated = DECL_SCOPE_TABLE_INCREMENT;
8301 decl_scope_depth = 0;
8302
8303 /* Allocate the initial hunk of the abbrev_die_table. */
8304 abbrev_die_table
8305 = (dw_die_ref *) xmalloc (ABBREV_DIE_TABLE_INCREMENT
8306 * sizeof (dw_die_ref));
8307 bzero (abbrev_die_table, ABBREV_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
8308 abbrev_die_table_allocated = ABBREV_DIE_TABLE_INCREMENT;
8309 /* zero-th entry is allocated, but unused */
8310 abbrev_die_table_in_use = 1;
8311
8312 /* Allocate the initial hunk of the line_info_table. */
8313 line_info_table
8314 = (dw_line_info_ref) xmalloc (LINE_INFO_TABLE_INCREMENT
8315 * sizeof (dw_line_info_entry));
8316 bzero (line_info_table, LINE_INFO_TABLE_INCREMENT
8317 * sizeof (dw_line_info_entry));
8318 line_info_table_allocated = LINE_INFO_TABLE_INCREMENT;
8319 /* zero-th entry is allocated, but unused */
8320 line_info_table_in_use = 1;
8321
8322 /* Allocate the initial hunk of the fde_table. */
8323 fde_table = (dw_fde_ref) xmalloc (FDE_TABLE_INCREMENT * sizeof (dw_fde_node));
8324 bzero (fde_table, FDE_TABLE_INCREMENT * sizeof (dw_fde_node));
8325 fde_table_allocated = FDE_TABLE_INCREMENT;
8326 fde_table_in_use = 0;
8327
a3f97cbb
JW		 8328 /* Generate the initial DIE for the .debug section. Note that the (string)
8329 value given in the DW_AT_name attribute of the DW_TAG_compile_unit DIE
8330 will (typically) be a relative pathname and that this pathname should be
8331 taken as being relative to the directory from which the compiler was
8332 invoked when the given (base) source file was compiled. */
8333 gen_compile_unit_die (main_input_filename);
8334
5c90448c 8335 ASM_GENERATE_INTERNAL_LABEL (text_end_label, TEXT_END_LABEL, 0);
a94dbf2c
JM		 8336
8337 /* Generate the CFA instructions common to all FDE's. Do it now for the
8338 sake of lookup_cfa. */
8339#ifdef MIPS_DEBUGGING_INFO
8340 /* On entry, the Call Frame Address is in the stack pointer register. */
8341 dwarf2out_def_cfa (NULL, gen_rtx (REG, VOIDmode, STACK_POINTER_REGNUM));
8342
8343 /* Set the RA on entry to be the contents of r31. */
8344 dwarf2out_return_save (NULL, gen_rtx (REG, VOIDmode, GP_REG_FIRST + 31));
8345#endif
a3f97cbb
JW		 8346}
8347
8348/* Output stuff that dwarf requires at the end of every file,
8349 and generate the DWARF-2 debugging info. */
8350void
9a666dda 8351dwarf2out_finish ()
a3f97cbb 8352{
a3f97cbb
JW		 8353 /* Traverse the DIE tree and add sibling attributes to those DIE's
8354 that have children. */
8355 add_sibling_attributes (comp_unit_die);
8356
8357 /* Output a terminator label for the .text section. */
8358 fputc ('\n', asm_out_file);
8359 ASM_OUTPUT_SECTION (asm_out_file, TEXT_SECTION);
5c90448c 8360 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, TEXT_END_LABEL, 0);
a3f97cbb 8361
bdb669cb 8362#if 0
a3f97cbb
JW		 8363 /* Output a terminator label for the .data section. */
8364 fputc ('\n', asm_out_file);
8365 ASM_OUTPUT_SECTION (asm_out_file, DATA_SECTION);
5c90448c 8366 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, DATA_END_LABEL, 0);
a3f97cbb
JW		 8367
8368 /* Output a terminator label for the .bss section. */
8369 fputc ('\n', asm_out_file);
8370 ASM_OUTPUT_SECTION (asm_out_file, BSS_SECTION);
5c90448c 8371 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BSS_END_LABEL, 0);
bdb669cb 8372#endif
a3f97cbb 8373
e90b62db
JM		 8374 /* Output the source line correspondence table. */
8375 if (line_info_table_in_use > 1 || separate_line_info_table_in_use)
8376 {
8377 fputc ('\n', asm_out_file);
8378 ASM_OUTPUT_SECTION (asm_out_file, LINE_SECTION);
8379 output_line_info ();
8380
8381 /* We can only use the low/high_pc attributes if all of the code
8382 was in .text. */
8383 if (separate_line_info_table_in_use == 0)
8384 {
8385 add_AT_lbl_id (comp_unit_die, DW_AT_low_pc, TEXT_SECTION);
5c90448c 8386 add_AT_lbl_id (comp_unit_die, DW_AT_high_pc, text_end_label);
e90b62db
JM		 8387 }
8388 add_AT_section_offset (comp_unit_die, DW_AT_stmt_list, LINE_SECTION);
8389 }
8390
a3f97cbb
JW		 8391 /* Output the abbreviation table. */
8392 fputc ('\n', asm_out_file);
8393 ASM_OUTPUT_SECTION (asm_out_file, ABBREV_SECTION);
8394 build_abbrev_table (comp_unit_die);
8395 output_abbrev_section ();
8396
a3f97cbb
JW		 8397 /* Initialize the beginning DIE offset - and calculate sizes/offsets. */
8398 next_die_offset = DWARF_COMPILE_UNIT_HEADER_SIZE;
8399 calc_die_sizes (comp_unit_die);
8400
a94dbf2c 8401 /* calculate sizes/offsets for FDEs. */
a3f97cbb
JW		 8402 calc_fde_sizes ();
8403
8404 /* Output debugging information. */
8405 fputc ('\n', asm_out_file);
8406 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_SECTION);
8407 output_compilation_unit_header ();
8408 output_die (comp_unit_die);
8409
d291dd49
JM		 8410 if (pubname_table_in_use)
8411 {
8412 /* Output public names table. */
8413 fputc ('\n', asm_out_file);
8414 ASM_OUTPUT_SECTION (asm_out_file, PUBNAMES_SECTION);
8415 output_pubnames ();
8416 }
8417
a3f97cbb
JW		 8418 if (fde_table_in_use)
8419 {
8420 /* Output call frame information. */
a3f97cbb
JW		 8421 output_call_frame_info ();
8422
a3f97cbb
JW		 8423 /* Output the address range information. */
8424 fputc ('\n', asm_out_file);
8425 ASM_OUTPUT_SECTION (asm_out_file, ARANGES_SECTION);
8426 output_aranges ();
8427 }
a94dbf2c
JM		 8428
8429 /* The only DIE we should have with a parent of NULL is comp_unit_die. */
8430 assert (limbo_die_count == 1);
a3f97cbb 8431}
9a666dda 8432#endif /* DWARF2_DEBUGGING_INFO */
GNU Compiler Collection
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