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800e920a | 1 | /* Definitions of target machine for GNU compiler, for DEC Alpha w/ELF. |
f6da8bc3 | 2 | Copyright (C) 1996, 97-99, 2000 Free Software Foundation, Inc. |
800e920a RK |
3 | Contributed by Richard Henderson (rth@tamu.edu). |
4 | ||
5 | This file is part of GNU CC. | |
6 | ||
7 | GNU CC is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GNU CC is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU CC; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
800e920a RK |
22 | #undef OBJECT_FORMAT_COFF |
23 | #undef EXTENDED_COFF | |
24 | #define OBJECT_FORMAT_ELF | |
25 | ||
b0435cf4 | 26 | #define DBX_DEBUGGING_INFO |
6abc6f40 | 27 | #define DWARF2_DEBUGGING_INFO |
800e920a | 28 | |
b0435cf4 RH |
29 | #undef PREFERRED_DEBUGGING_TYPE |
30 | #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG | |
800e920a | 31 | |
b0435cf4 | 32 | #undef ASM_FINAL_SPEC |
800e920a | 33 | |
bb8ebb7f RH |
34 | #undef CC1_SPEC |
35 | #define CC1_SPEC "%{G*}" | |
36 | ||
37 | #undef ASM_SPEC | |
6abc6f40 | 38 | #define ASM_SPEC "%{G*} %{relax:-relax} %{gdwarf*:-no-mdebug}" |
bb8ebb7f | 39 | |
800e920a | 40 | #undef LINK_SPEC |
bb8ebb7f RH |
41 | #define LINK_SPEC "-m elf64alpha %{G*} %{relax:-relax} \ |
42 | %{O*:-O3} %{!O*:-O1} \ | |
800e920a RK |
43 | %{shared:-shared} \ |
44 | %{!shared: \ | |
45 | %{!static: \ | |
46 | %{rdynamic:-export-dynamic} \ | |
952fc2ed | 47 | %{!dynamic-linker:-dynamic-linker %(elf_dynamic_linker)}} \ |
800e920a | 48 | %{static:-static}}" |
ca20876d | 49 | |
800e920a | 50 | /* Output at beginning of assembler file. */ |
800e920a RK |
51 | #undef ASM_FILE_START |
52 | #define ASM_FILE_START(FILE) \ | |
6abc6f40 RH |
53 | do { \ |
54 | if (write_symbols != DWARF2_DEBUG) \ | |
55 | { \ | |
56 | alpha_write_verstamp (FILE); \ | |
57 | output_file_directive (FILE, main_input_filename); \ | |
58 | } \ | |
800e920a | 59 | fprintf (FILE, "\t.set noat\n"); \ |
6abc6f40 | 60 | fprintf (FILE, "\t.set noreorder\n"); \ |
de4abb91 | 61 | if (TARGET_BWX | TARGET_MAX | TARGET_FIX | TARGET_CIX) \ |
b0435cf4 RH |
62 | { \ |
63 | fprintf (FILE, "\t.arch %s\n", \ | |
64 | (alpha_cpu == PROCESSOR_EV6 ? "ev6" \ | |
65 | : TARGET_MAX ? "pca56" : "ev56")); \ | |
66 | } \ | |
6abc6f40 | 67 | } while (0) |
800e920a | 68 | |
800e920a RK |
69 | extern void output_file_directive (); |
70 | ||
71 | /* Attach a special .ident directive to the end of the file to identify | |
72 | the version of GCC which compiled this code. The format of the | |
73 | .ident string is patterned after the ones produced by native svr4 | |
74 | C compilers. */ | |
75 | ||
76 | #define IDENT_ASM_OP ".ident" | |
77 | ||
78 | #ifdef IDENTIFY_WITH_IDENT | |
79 | #define ASM_IDENTIFY_GCC(FILE) /* nothing */ | |
80 | #define ASM_IDENTIFY_LANGUAGE(FILE) \ | |
81 | fprintf(FILE, "\t%s \"GCC (%s) %s\"\n", IDENT_ASM_OP, \ | |
82 | lang_identify(), version_string) | |
83 | #else | |
84 | #define ASM_FILE_END(FILE) \ | |
85 | do { \ | |
be163a70 ZW |
86 | if (!flag_no_ident) \ |
87 | fprintf ((FILE), "\t%s\t\"GCC: (GNU) %s\"\n", \ | |
88 | IDENT_ASM_OP, version_string); \ | |
800e920a RK |
89 | } while (0) |
90 | #endif | |
91 | ||
92 | /* Allow #sccs in preprocessor. */ | |
800e920a RK |
93 | #define SCCS_DIRECTIVE |
94 | ||
95 | /* Output #ident as a .ident. */ | |
800e920a RK |
96 | #define ASM_OUTPUT_IDENT(FILE, NAME) \ |
97 | fprintf (FILE, "\t%s\t\"%s\"\n", IDENT_ASM_OP, NAME); | |
98 | ||
99 | /* This is how to allocate empty space in some section. The .zero | |
100 | pseudo-op is used for this on most svr4 assemblers. */ | |
101 | ||
102 | #define SKIP_ASM_OP ".zero" | |
103 | ||
104 | #undef ASM_OUTPUT_SKIP | |
105 | #define ASM_OUTPUT_SKIP(FILE,SIZE) \ | |
106 | fprintf (FILE, "\t%s\t%u\n", SKIP_ASM_OP, (SIZE)) | |
107 | ||
108 | /* Output the label which precedes a jumptable. Note that for all svr4 | |
109 | systems where we actually generate jumptables (which is to say every | |
110 | svr4 target except i386, where we use casesi instead) we put the jump- | |
111 | tables into the .rodata section and since other stuff could have been | |
112 | put into the .rodata section prior to any given jumptable, we have to | |
113 | make sure that the location counter for the .rodata section gets pro- | |
114 | perly re-aligned prior to the actual beginning of the jump table. */ | |
115 | ||
116 | #define ALIGN_ASM_OP ".align" | |
117 | ||
118 | #ifndef ASM_OUTPUT_BEFORE_CASE_LABEL | |
119 | #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE) \ | |
120 | ASM_OUTPUT_ALIGN ((FILE), 2); | |
121 | #endif | |
122 | ||
123 | #undef ASM_OUTPUT_CASE_LABEL | |
124 | #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,JUMPTABLE) \ | |
125 | do { \ | |
126 | ASM_OUTPUT_BEFORE_CASE_LABEL (FILE, PREFIX, NUM, JUMPTABLE) \ | |
127 | ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); \ | |
128 | } while (0) | |
129 | ||
130 | /* The standard SVR4 assembler seems to require that certain builtin | |
131 | library routines (e.g. .udiv) be explicitly declared as .globl | |
132 | in each assembly file where they are referenced. */ | |
133 | ||
134 | #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \ | |
135 | ASM_GLOBALIZE_LABEL (FILE, XSTR (FUN, 0)) | |
136 | ||
137 | /* This says how to output assembler code to declare an | |
138 | uninitialized external linkage data object. Under SVR4, | |
139 | the linker seems to want the alignment of data objects | |
140 | to depend on their types. We do exactly that here. */ | |
141 | ||
142 | #define COMMON_ASM_OP ".comm" | |
143 | ||
144 | #undef ASM_OUTPUT_ALIGNED_COMMON | |
145 | #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \ | |
146 | do { \ | |
147 | fprintf ((FILE), "\t%s\t", COMMON_ASM_OP); \ | |
148 | assemble_name ((FILE), (NAME)); \ | |
149 | fprintf ((FILE), ",%u,%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT); \ | |
150 | } while (0) | |
151 | ||
152 | /* This says how to output assembler code to declare an | |
153 | uninitialized internal linkage data object. Under SVR4, | |
154 | the linker seems to want the alignment of data objects | |
155 | to depend on their types. We do exactly that here. */ | |
156 | ||
800e920a RK |
157 | #undef ASM_OUTPUT_ALIGNED_LOCAL |
158 | #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \ | |
159 | do { \ | |
bb8ebb7f RH |
160 | if ((SIZE) <= g_switch_value) \ |
161 | sbss_section(); \ | |
162 | else \ | |
163 | bss_section(); \ | |
164 | fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \ | |
165 | assemble_name (FILE, NAME); \ | |
166 | putc (',', FILE); \ | |
167 | fprintf (FILE, TYPE_OPERAND_FMT, "object"); \ | |
168 | putc ('\n', FILE); \ | |
169 | if (!flag_inhibit_size_directive) \ | |
170 | { \ | |
171 | fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \ | |
172 | assemble_name (FILE, NAME); \ | |
173 | fprintf (FILE, ",%d\n", (SIZE)); \ | |
174 | } \ | |
175 | ASM_OUTPUT_ALIGN ((FILE), exact_log2((ALIGN) / BITS_PER_UNIT)); \ | |
176 | ASM_OUTPUT_LABEL(FILE, NAME); \ | |
177 | ASM_OUTPUT_SKIP((FILE), (SIZE)); \ | |
800e920a RK |
178 | } while (0) |
179 | ||
8c9aceea RK |
180 | /* This is the pseudo-op used to generate a 64-bit word of data with a |
181 | specific value in some section. */ | |
800e920a | 182 | |
8c9aceea | 183 | #define INT_ASM_OP ".quad" |
800e920a | 184 | |
bb8ebb7f RH |
185 | /* Biggest alignment supported by the object file format of this |
186 | machine. Use this macro to limit the alignment which can be | |
187 | specified using the `__attribute__ ((aligned (N)))' construct. If | |
188 | not defined, the default value is `BIGGEST_ALIGNMENT'. | |
189 | ||
190 | This value is really 2^63. Since gcc figures the alignment in bits, | |
191 | we could only potentially get to 2^60 on suitible hosts. Due to other | |
192 | considerations in varasm, we must restrict this to what fits in an int. */ | |
193 | ||
194 | #define MAX_OFILE_ALIGNMENT \ | |
195 | (1 << (HOST_BITS_PER_INT < 64 ? HOST_BITS_PER_INT - 2 : 62)) | |
196 | ||
800e920a RK |
197 | /* This is the pseudo-op used to generate a contiguous sequence of byte |
198 | values from a double-quoted string WITHOUT HAVING A TERMINATING NUL | |
199 | AUTOMATICALLY APPENDED. This is the same for most svr4 assemblers. */ | |
200 | ||
201 | #undef ASCII_DATA_ASM_OP | |
202 | #define ASCII_DATA_ASM_OP ".ascii" | |
203 | ||
204 | /* Support const sections and the ctors and dtors sections for g++. | |
205 | Note that there appears to be two different ways to support const | |
206 | sections at the moment. You can either #define the symbol | |
207 | READONLY_DATA_SECTION (giving it some code which switches to the | |
208 | readonly data section) or else you can #define the symbols | |
209 | EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and | |
210 | SELECT_RTX_SECTION. We do both here just to be on the safe side. */ | |
211 | ||
212 | #define USE_CONST_SECTION 1 | |
213 | ||
214 | #define CONST_SECTION_ASM_OP ".section\t.rodata" | |
215 | ||
216 | /* Define the pseudo-ops used to switch to the .ctors and .dtors sections. | |
217 | ||
218 | Note that we want to give these sections the SHF_WRITE attribute | |
219 | because these sections will actually contain data (i.e. tables of | |
220 | addresses of functions in the current root executable or shared library | |
221 | file) and, in the case of a shared library, the relocatable addresses | |
222 | will have to be properly resolved/relocated (and then written into) by | |
223 | the dynamic linker when it actually attaches the given shared library | |
224 | to the executing process. (Note that on SVR4, you may wish to use the | |
225 | `-z text' option to the ELF linker, when building a shared library, as | |
226 | an additional check that you are doing everything right. But if you do | |
227 | use the `-z text' option when building a shared library, you will get | |
228 | errors unless the .ctors and .dtors sections are marked as writable | |
229 | via the SHF_WRITE attribute.) */ | |
230 | ||
231 | #define CTORS_SECTION_ASM_OP ".section\t.ctors,\"aw\"" | |
232 | #define DTORS_SECTION_ASM_OP ".section\t.dtors,\"aw\"" | |
233 | ||
bb8ebb7f RH |
234 | /* Handle the small data sections. */ |
235 | #define BSS_SECTION_ASM_OP ".section\t.bss" | |
236 | #define SBSS_SECTION_ASM_OP ".section\t.sbss,\"aw\"" | |
237 | #define SDATA_SECTION_ASM_OP ".section\t.sdata,\"aw\"" | |
238 | ||
800e920a RK |
239 | /* On svr4, we *do* have support for the .init and .fini sections, and we |
240 | can put stuff in there to be executed before and after `main'. We let | |
241 | crtstuff.c and other files know this by defining the following symbols. | |
242 | The definitions say how to change sections to the .init and .fini | |
243 | sections. This is the same for all known svr4 assemblers. */ | |
244 | ||
245 | #define INIT_SECTION_ASM_OP ".section\t.init" | |
246 | #define FINI_SECTION_ASM_OP ".section\t.fini" | |
247 | ||
248 | /* A default list of other sections which we might be "in" at any given | |
249 | time. For targets that use additional sections (e.g. .tdesc) you | |
250 | should override this definition in the target-specific file which | |
251 | includes this file. */ | |
252 | ||
253 | #undef EXTRA_SECTIONS | |
bb8ebb7f | 254 | #define EXTRA_SECTIONS in_const, in_ctors, in_dtors, in_sbss, in_sdata |
800e920a RK |
255 | |
256 | /* A default list of extra section function definitions. For targets | |
257 | that use additional sections (e.g. .tdesc) you should override this | |
258 | definition in the target-specific file which includes this file. */ | |
259 | ||
260 | #undef EXTRA_SECTION_FUNCTIONS | |
261 | #define EXTRA_SECTION_FUNCTIONS \ | |
262 | CONST_SECTION_FUNCTION \ | |
bb8ebb7f RH |
263 | SECTION_FUNCTION_TEMPLATE(ctors_section, in_ctors, CTORS_SECTION_ASM_OP) \ |
264 | SECTION_FUNCTION_TEMPLATE(dtors_section, in_dtors, DTORS_SECTION_ASM_OP) \ | |
265 | SECTION_FUNCTION_TEMPLATE(sbss_section, in_sbss, SBSS_SECTION_ASM_OP) \ | |
266 | SECTION_FUNCTION_TEMPLATE(sdata_section, in_sdata, SDATA_SECTION_ASM_OP) | |
800e920a RK |
267 | |
268 | #undef READONLY_DATA_SECTION | |
269 | #define READONLY_DATA_SECTION() const_section () | |
270 | ||
aa388f29 | 271 | #define CONST_SECTION_FUNCTION \ |
aa388f29 RH |
272 | void \ |
273 | const_section () \ | |
274 | { \ | |
275 | if (!USE_CONST_SECTION) \ | |
276 | text_section(); \ | |
277 | else if (in_section != in_const) \ | |
278 | { \ | |
279 | fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP); \ | |
280 | in_section = in_const; \ | |
281 | } \ | |
800e920a RK |
282 | } |
283 | ||
aa388f29 | 284 | #define SECTION_FUNCTION_TEMPLATE(FN, ENUM, OP) \ |
f6da8bc3 | 285 | void FN PARAMS ((void)); \ |
aa388f29 RH |
286 | void FN () \ |
287 | { \ | |
288 | if (in_section != ENUM) \ | |
289 | { \ | |
290 | fprintf (asm_out_file, "%s\n", OP); \ | |
291 | in_section = ENUM; \ | |
292 | } \ | |
800e920a RK |
293 | } |
294 | ||
800e920a RK |
295 | |
296 | /* Switch into a generic section. | |
297 | This is currently only used to support section attributes. | |
298 | ||
299 | We make the section read-only and executable for a function decl, | |
300 | read-only for a const data decl, and writable for a non-const data decl. */ | |
ad4ff310 | 301 | #define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME, RELOC) \ |
800e920a RK |
302 | fprintf (FILE, ".section\t%s,\"%s\",@progbits\n", NAME, \ |
303 | (DECL) && TREE_CODE (DECL) == FUNCTION_DECL ? "ax" : \ | |
ad4ff310 | 304 | (DECL) && DECL_READONLY_SECTION (DECL, RELOC) ? "a" : "aw") |
800e920a RK |
305 | |
306 | ||
307 | /* A C statement (sans semicolon) to output an element in the table of | |
308 | global constructors. */ | |
309 | #define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \ | |
310 | do { \ | |
311 | ctors_section (); \ | |
312 | fprintf (FILE, "\t%s\t ", INT_ASM_OP); \ | |
313 | assemble_name (FILE, NAME); \ | |
314 | fprintf (FILE, "\n"); \ | |
315 | } while (0) | |
316 | ||
317 | /* A C statement (sans semicolon) to output an element in the table of | |
318 | global destructors. */ | |
319 | #define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \ | |
320 | do { \ | |
321 | dtors_section (); \ | |
322 | fprintf (FILE, "\t%s\t ", INT_ASM_OP); \ | |
323 | assemble_name (FILE, NAME); \ | |
324 | fprintf (FILE, "\n"); \ | |
325 | } while (0) | |
326 | ||
327 | /* A C statement or statements to switch to the appropriate | |
328 | section for output of DECL. DECL is either a `VAR_DECL' node | |
329 | or a constant of some sort. RELOC indicates whether forming | |
330 | the initial value of DECL requires link-time relocations. */ | |
331 | ||
332 | #define SELECT_SECTION(DECL,RELOC) \ | |
333 | { \ | |
334 | if (TREE_CODE (DECL) == STRING_CST) \ | |
335 | { \ | |
336 | if (! flag_writable_strings) \ | |
337 | const_section (); \ | |
338 | else \ | |
339 | data_section (); \ | |
340 | } \ | |
341 | else if (TREE_CODE (DECL) == VAR_DECL) \ | |
342 | { \ | |
343 | if ((flag_pic && RELOC) \ | |
344 | || !TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL) \ | |
345 | || !DECL_INITIAL (DECL) \ | |
346 | || (DECL_INITIAL (DECL) != error_mark_node \ | |
347 | && !TREE_CONSTANT (DECL_INITIAL (DECL)))) \ | |
bb8ebb7f RH |
348 | { \ |
349 | int size = int_size_in_bytes (TREE_TYPE (DECL)); \ | |
350 | if (size >= 0 && size <= g_switch_value) \ | |
351 | sdata_section (); \ | |
352 | else \ | |
353 | data_section (); \ | |
354 | } \ | |
800e920a RK |
355 | else \ |
356 | const_section (); \ | |
357 | } \ | |
358 | else \ | |
359 | const_section (); \ | |
360 | } | |
361 | ||
362 | /* A C statement or statements to switch to the appropriate | |
363 | section for output of RTX in mode MODE. RTX is some kind | |
364 | of constant in RTL. The argument MODE is redundant except | |
365 | in the case of a `const_int' rtx. Currently, these always | |
366 | go into the const section. */ | |
367 | ||
368 | #undef SELECT_RTX_SECTION | |
369 | #define SELECT_RTX_SECTION(MODE,RTX) const_section() | |
370 | ||
371 | /* Define the strings used for the special svr4 .type and .size directives. | |
372 | These strings generally do not vary from one system running svr4 to | |
373 | another, but if a given system (e.g. m88k running svr) needs to use | |
374 | different pseudo-op names for these, they may be overridden in the | |
375 | file which includes this one. */ | |
376 | ||
377 | #define TYPE_ASM_OP ".type" | |
378 | #define SIZE_ASM_OP ".size" | |
379 | ||
380 | /* This is how we tell the assembler that a symbol is weak. */ | |
381 | ||
382 | #define ASM_WEAKEN_LABEL(FILE,NAME) \ | |
383 | do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \ | |
384 | fputc ('\n', FILE); } while (0) | |
385 | ||
386 | /* This is how we tell the assembler that two symbols have the same value. */ | |
387 | ||
388 | #define ASM_OUTPUT_DEF(FILE,NAME1,NAME2) \ | |
389 | do { assemble_name(FILE, NAME1); \ | |
390 | fputs(" = ", FILE); \ | |
391 | assemble_name(FILE, NAME2); \ | |
392 | fputc('\n', FILE); } while (0) | |
393 | ||
394 | /* The following macro defines the format used to output the second | |
395 | operand of the .type assembler directive. Different svr4 assemblers | |
396 | expect various different forms for this operand. The one given here | |
397 | is just a default. You may need to override it in your machine- | |
398 | specific tm.h file (depending upon the particulars of your assembler). */ | |
399 | ||
400 | #define TYPE_OPERAND_FMT "@%s" | |
401 | ||
402 | /* Write the extra assembler code needed to declare a function's result. | |
403 | Most svr4 assemblers don't require any special declaration of the | |
404 | result value, but there are exceptions. */ | |
405 | ||
406 | #ifndef ASM_DECLARE_RESULT | |
407 | #define ASM_DECLARE_RESULT(FILE, RESULT) | |
408 | #endif | |
409 | ||
410 | /* These macros generate the special .type and .size directives which | |
411 | are used to set the corresponding fields of the linker symbol table | |
412 | entries in an ELF object file under SVR4. These macros also output | |
413 | the starting labels for the relevant functions/objects. */ | |
414 | ||
415 | /* Write the extra assembler code needed to declare an object properly. */ | |
416 | ||
e2bef702 RH |
417 | #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \ |
418 | do { \ | |
419 | HOST_WIDE_INT size; \ | |
420 | fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \ | |
421 | assemble_name (FILE, NAME); \ | |
422 | putc (',', FILE); \ | |
423 | fprintf (FILE, TYPE_OPERAND_FMT, "object"); \ | |
424 | putc ('\n', FILE); \ | |
425 | size_directive_output = 0; \ | |
426 | if (!flag_inhibit_size_directive \ | |
427 | && DECL_SIZE (DECL) \ | |
428 | && (size = int_size_in_bytes (TREE_TYPE (DECL))) > 0) \ | |
429 | { \ | |
430 | size_directive_output = 1; \ | |
431 | fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \ | |
432 | assemble_name (FILE, NAME); \ | |
433 | fputc (',', FILE); \ | |
434 | fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, size); \ | |
435 | fputc ('\n', FILE); \ | |
436 | } \ | |
437 | ASM_OUTPUT_LABEL(FILE, NAME); \ | |
800e920a RK |
438 | } while (0) |
439 | ||
440 | /* Output the size directive for a decl in rest_of_decl_compilation | |
441 | in the case where we did not do so before the initializer. | |
442 | Once we find the error_mark_node, we know that the value of | |
443 | size_directive_output was set | |
444 | by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */ | |
445 | ||
ca7cdae3 | 446 | #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \ |
e2bef702 | 447 | do { \ |
e03c5670 | 448 | const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \ |
e2bef702 RH |
449 | HOST_WIDE_INT size; \ |
450 | if (!flag_inhibit_size_directive \ | |
451 | && DECL_SIZE (DECL) \ | |
452 | && ! AT_END && TOP_LEVEL \ | |
453 | && DECL_INITIAL (DECL) == error_mark_node \ | |
454 | && !size_directive_output \ | |
455 | && (size = int_size_in_bytes (TREE_TYPE (DECL))) > 0) \ | |
456 | { \ | |
457 | size_directive_output = 1; \ | |
458 | fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \ | |
459 | assemble_name (FILE, name); \ | |
460 | fputc (',', FILE); \ | |
461 | fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, size); \ | |
462 | fputc ('\n', FILE); \ | |
463 | } \ | |
464 | } while (0) | |
800e920a RK |
465 | |
466 | /* A table of bytes codes used by the ASM_OUTPUT_ASCII and | |
467 | ASM_OUTPUT_LIMITED_STRING macros. Each byte in the table | |
468 | corresponds to a particular byte value [0..255]. For any | |
469 | given byte value, if the value in the corresponding table | |
470 | position is zero, the given character can be output directly. | |
471 | If the table value is 1, the byte must be output as a \ooo | |
472 | octal escape. If the tables value is anything else, then the | |
473 | byte value should be output as a \ followed by the value | |
474 | in the table. Note that we can use standard UN*X escape | |
475 | sequences for many control characters, but we don't use | |
476 | \a to represent BEL because some svr4 assemblers (e.g. on | |
477 | the i386) don't know about that. Also, we don't use \v | |
478 | since some versions of gas, such as 2.2 did not accept it. */ | |
479 | ||
480 | #define ESCAPES \ | |
481 | "\1\1\1\1\1\1\1\1btn\1fr\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\ | |
482 | \0\0\"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ | |
483 | \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\\\0\0\0\ | |
484 | \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\ | |
485 | \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\ | |
486 | \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\ | |
487 | \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\ | |
488 | \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1" | |
489 | ||
490 | /* Some svr4 assemblers have a limit on the number of characters which | |
491 | can appear in the operand of a .string directive. If your assembler | |
492 | has such a limitation, you should define STRING_LIMIT to reflect that | |
493 | limit. Note that at least some svr4 assemblers have a limit on the | |
494 | actual number of bytes in the double-quoted string, and that they | |
495 | count each character in an escape sequence as one byte. Thus, an | |
496 | escape sequence like \377 would count as four bytes. | |
497 | ||
498 | If your target assembler doesn't support the .string directive, you | |
b0435cf4 | 499 | should define this to zero. */ |
800e920a RK |
500 | |
501 | #define STRING_LIMIT ((unsigned) 256) | |
800e920a RK |
502 | #define STRING_ASM_OP ".string" |
503 | ||
b0435cf4 | 504 | /* GAS is the only Alpha/ELF assembler. */ |
800e920a RK |
505 | #undef TARGET_GAS |
506 | #define TARGET_GAS (1) | |
507 | ||
b0435cf4 RH |
508 | /* Provide a STARTFILE_SPEC appropriate for ELF. Here we add the |
509 | (even more) magical crtbegin.o file which provides part of the | |
510 | support for getting C++ file-scope static object constructed before | |
511 | entering `main'. | |
800e920a | 512 | |
b0435cf4 RH |
513 | Don't bother seeing crtstuff.c -- there is absolutely no hope of |
514 | getting that file to understand multiple GPs. GNU Libc provides a | |
515 | hand-coded version that is used on Linux; it could be copied here | |
516 | if there is ever a need. */ | |
800e920a RK |
517 | |
518 | #undef STARTFILE_SPEC | |
519 | #define STARTFILE_SPEC \ | |
520 | "%{!shared: \ | |
521 | %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}\ | |
290c8b1f | 522 | crti.o%s crtbegin.o%s" |
800e920a | 523 | |
b0435cf4 RH |
524 | /* Provide a ENDFILE_SPEC appropriate for ELF. Here we tack on the |
525 | magical crtend.o file which provides part of the support for | |
526 | getting C++ file-scope static object constructed before entering | |
527 | `main', followed by a normal ELF "finalizer" file, `crtn.o'. */ | |
800e920a RK |
528 | |
529 | #undef ENDFILE_SPEC | |
530 | #define ENDFILE_SPEC \ | |
290c8b1f | 531 | "crtend.o%s crtn.o%s" |
b0435cf4 RH |
532 | |
533 | /* We support #pragma. */ | |
534 | #define HANDLE_SYSV_PRAGMA | |
6690d24c RH |
535 | |
536 | /* Undo the auto-alignment stuff from alpha.h. ELF has unaligned data | |
537 | pseudos natively. */ | |
538 | #undef UNALIGNED_SHORT_ASM_OP | |
539 | #undef UNALIGNED_INT_ASM_OP | |
540 | #undef UNALIGNED_DOUBLE_INT_ASM_OP |