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ee890fe2 | 1 | /* Functions for generic Darwin as target machine for GNU C compiler. |
5b86a469 KH |
2 | Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004, |
3 | 2005 | |
ee890fe2 SS |
4 | Free Software Foundation, Inc. |
5 | Contributed by Apple Computer Inc. | |
6 | ||
7ec022b2 | 7 | This file is part of GCC. |
ee890fe2 | 8 | |
7ec022b2 | 9 | GCC is free software; you can redistribute it and/or modify |
ee890fe2 SS |
10 | it under the terms of the GNU General Public License as published by |
11 | the Free Software Foundation; either version 2, or (at your option) | |
12 | any later version. | |
13 | ||
7ec022b2 | 14 | GCC is distributed in the hope that it will be useful, |
ee890fe2 SS |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
7ec022b2 | 20 | along with GCC; see the file COPYING. If not, write to |
39d14dda KC |
21 | the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
22 | Boston, MA 02110-1301, USA. */ | |
ee890fe2 SS |
23 | |
24 | #include "config.h" | |
25 | #include "system.h" | |
4977bab6 ZW |
26 | #include "coretypes.h" |
27 | #include "tm.h" | |
ee890fe2 SS |
28 | #include "rtl.h" |
29 | #include "regs.h" | |
30 | #include "hard-reg-set.h" | |
31 | #include "real.h" | |
32 | #include "insn-config.h" | |
33 | #include "conditions.h" | |
34 | #include "insn-flags.h" | |
35 | #include "output.h" | |
36 | #include "insn-attr.h" | |
37 | #include "flags.h" | |
38 | #include "tree.h" | |
39 | #include "expr.h" | |
40 | #include "reload.h" | |
ee890fe2 SS |
41 | #include "function.h" |
42 | #include "ggc.h" | |
3ac88239 | 43 | #include "langhooks.h" |
1adaa117 | 44 | #include "target.h" |
245ff137 | 45 | #include "tm_p.h" |
4c714dd4 | 46 | #include "toplev.h" |
11abc112 | 47 | #include "hashtab.h" |
ee890fe2 | 48 | |
699c914a MS |
49 | /* Darwin supports a feature called fix-and-continue, which is used |
50 | for rapid turn around debugging. When code is compiled with the | |
51 | -mfix-and-continue flag, two changes are made to the generated code | |
52 | that allow the system to do things that it would normally not be | |
53 | able to do easily. These changes allow gdb to load in | |
54 | recompilation of a translation unit that has been changed into a | |
55 | running program and replace existing functions and methods of that | |
56 | translation unit with with versions of those functions and methods | |
57 | from the newly compiled translation unit. The new functions access | |
d6ff8575 MS |
58 | the existing static symbols from the old translation unit, if the |
59 | symbol existed in the unit to be replaced, and from the new | |
60 | translation unit, otherwise. | |
699c914a | 61 | |
de2ab0ca | 62 | The changes are to insert 5 nops at the beginning of all functions |
d6ff8575 | 63 | and to use indirection to get at static symbols. The 5 nops |
699c914a MS |
64 | are required by consumers of the generated code. Currently, gdb |
65 | uses this to patch in a jump to the overriding function, this | |
66 | allows all uses of the old name to forward to the replacement, | |
c112cf2b | 67 | including existing function pointers and virtual methods. See |
699c914a MS |
68 | rs6000_emit_prologue for the code that handles the nop insertions. |
69 | ||
70 | The added indirection allows gdb to redirect accesses to static | |
d6ff8575 MS |
71 | symbols from the newly loaded translation unit to the existing |
72 | symbol, if any. @code{static} symbols are special and are handled by | |
73 | setting the second word in the .non_lazy_symbol_pointer data | |
74 | structure to symbol. See indirect_data for the code that handles | |
75 | the extra indirection, and machopic_output_indirection and its use | |
76 | of MACHO_SYMBOL_STATIC for the code that handles @code{static} | |
77 | symbol indirection. */ | |
699c914a | 78 | |
d6b5193b RS |
79 | /* Define the individual section variables. */ |
80 | #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) section *NAME; | |
81 | #include "config/darwin-sections.def" | |
82 | #undef DEF_SECTION | |
83 | ||
84 | /* A get_unnamed_section callback used to switch to an ObjC section. | |
85 | DIRECTIVE is as for output_section_asm_op. */ | |
86 | ||
87 | static void | |
88 | output_objc_section_asm_op (const void *directive) | |
89 | { | |
90 | static int been_here = 0; | |
91 | ||
92 | if (been_here == 0) | |
93 | { | |
94 | been_here = 1; | |
95 | /* written, cold -> hot */ | |
96 | switch_to_section (objc_cat_cls_meth_section); | |
97 | switch_to_section (objc_cat_inst_meth_section); | |
98 | switch_to_section (objc_string_object_section); | |
99 | switch_to_section (objc_constant_string_object_section); | |
100 | switch_to_section (objc_selector_refs_section); | |
101 | switch_to_section (objc_selector_fixup_section); | |
102 | switch_to_section (objc_cls_refs_section); | |
103 | switch_to_section (objc_class_section); | |
104 | switch_to_section (objc_meta_class_section); | |
105 | /* shared, hot -> cold */ | |
106 | switch_to_section (objc_cls_meth_section); | |
107 | switch_to_section (objc_inst_meth_section); | |
108 | switch_to_section (objc_protocol_section); | |
109 | switch_to_section (objc_class_names_section); | |
110 | switch_to_section (objc_meth_var_types_section); | |
111 | switch_to_section (objc_meth_var_names_section); | |
112 | switch_to_section (objc_category_section); | |
113 | switch_to_section (objc_class_vars_section); | |
114 | switch_to_section (objc_instance_vars_section); | |
115 | switch_to_section (objc_module_info_section); | |
116 | switch_to_section (objc_symbols_section); | |
117 | } | |
118 | output_section_asm_op (directive); | |
119 | } | |
120 | ||
121 | /* Implement TARGET_ASM_INIT_SECTIONS. */ | |
122 | ||
123 | void | |
124 | darwin_init_sections (void) | |
125 | { | |
126 | #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) \ | |
127 | NAME = get_unnamed_section (FLAGS, (OBJC \ | |
128 | ? output_objc_section_asm_op \ | |
129 | : output_section_asm_op), \ | |
130 | "\t" DIRECTIVE); | |
131 | #include "darwin-sections.def" | |
132 | #undef DEF_SECTION | |
133 | ||
134 | readonly_data_section = const_section; | |
135 | exception_section = darwin_exception_section; | |
136 | eh_frame_section = darwin_eh_frame_section; | |
137 | } | |
699c914a | 138 | |
ee890fe2 | 139 | int |
9c808aad | 140 | name_needs_quotes (const char *name) |
ee890fe2 SS |
141 | { |
142 | int c; | |
143 | while ((c = *name++) != '\0') | |
6f94a68e | 144 | if (! ISIDNUM (c) && c != '.' && c != '$') |
ee890fe2 SS |
145 | return 1; |
146 | return 0; | |
147 | } | |
148 | ||
16515e5c | 149 | /* Return true if SYM_REF can be used without an indirection. */ |
11abc112 MM |
150 | static int |
151 | machopic_symbol_defined_p (rtx sym_ref) | |
ee890fe2 | 152 | { |
16515e5c AP |
153 | if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_DEFINED) |
154 | return true; | |
155 | ||
156 | /* If a symbol references local and is not an extern to this | |
157 | file, then the symbol might be able to declared as defined. */ | |
158 | if (SYMBOL_REF_LOCAL_P (sym_ref) && ! SYMBOL_REF_EXTERNAL_P (sym_ref)) | |
159 | { | |
160 | /* If the symbol references a variable and the variable is a | |
161 | common symbol, then this symbol is not defined. */ | |
162 | if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_VARIABLE) | |
163 | { | |
164 | tree decl = SYMBOL_REF_DECL (sym_ref); | |
165 | if (!decl) | |
166 | return true; | |
167 | if (DECL_COMMON (decl)) | |
168 | return false; | |
169 | } | |
170 | return true; | |
171 | } | |
172 | return false; | |
ee890fe2 SS |
173 | } |
174 | ||
11abc112 MM |
175 | /* This module assumes that (const (symbol_ref "foo")) is a legal pic |
176 | reference, which will not be changed. */ | |
9c808aad | 177 | |
ee890fe2 | 178 | enum machopic_addr_class |
11abc112 | 179 | machopic_classify_symbol (rtx sym_ref) |
ee890fe2 | 180 | { |
11abc112 MM |
181 | int flags; |
182 | bool function_p; | |
183 | ||
184 | flags = SYMBOL_REF_FLAGS (sym_ref); | |
185 | function_p = SYMBOL_REF_FUNCTION_P (sym_ref); | |
186 | if (machopic_symbol_defined_p (sym_ref)) | |
187 | return (function_p | |
188 | ? MACHOPIC_DEFINED_FUNCTION : MACHOPIC_DEFINED_DATA); | |
189 | else | |
190 | return (function_p | |
191 | ? MACHOPIC_UNDEFINED_FUNCTION : MACHOPIC_UNDEFINED_DATA); | |
ee890fe2 SS |
192 | } |
193 | ||
699c914a MS |
194 | #ifndef TARGET_FIX_AND_CONTINUE |
195 | #define TARGET_FIX_AND_CONTINUE 0 | |
196 | #endif | |
197 | ||
198 | /* Indicate when fix-and-continue style code generation is being used | |
199 | and when a reference to data should be indirected so that it can be | |
35fd3193 | 200 | rebound in a new translation unit to reference the original instance |
699c914a MS |
201 | of that data. Symbol names that are for code generation local to |
202 | the translation unit are bound to the new translation unit; | |
203 | currently this means symbols that begin with L or _OBJC_; | |
204 | otherwise, we indicate that an indirect reference should be made to | |
205 | permit the runtime to rebind new instances of the translation unit | |
206 | to the original instance of the data. */ | |
207 | ||
208 | static int | |
209 | indirect_data (rtx sym_ref) | |
210 | { | |
211 | int lprefix; | |
212 | const char *name; | |
213 | ||
214 | /* If we aren't generating fix-and-continue code, don't do anything special. */ | |
215 | if (TARGET_FIX_AND_CONTINUE == 0) | |
216 | return 0; | |
217 | ||
218 | /* Otherwise, all symbol except symbols that begin with L or _OBJC_ | |
219 | are indirected. Symbols that begin with L and _OBJC_ are always | |
220 | bound to the current translation unit as they are used for | |
221 | generated local data of the translation unit. */ | |
222 | ||
223 | name = XSTR (sym_ref, 0); | |
224 | ||
225 | lprefix = (((name[0] == '*' || name[0] == '&') | |
226 | && (name[1] == 'L' || (name[1] == '"' && name[2] == 'L'))) | |
ad6aaeb6 | 227 | || (strncmp (name, "_OBJC_", 6) == 0)); |
699c914a MS |
228 | |
229 | return ! lprefix; | |
230 | } | |
231 | ||
232 | ||
ee890fe2 | 233 | static int |
11abc112 | 234 | machopic_data_defined_p (rtx sym_ref) |
ee890fe2 | 235 | { |
699c914a MS |
236 | if (indirect_data (sym_ref)) |
237 | return 0; | |
238 | ||
11abc112 | 239 | switch (machopic_classify_symbol (sym_ref)) |
ee890fe2 SS |
240 | { |
241 | case MACHOPIC_DEFINED_DATA: | |
0e1ad529 | 242 | case MACHOPIC_DEFINED_FUNCTION: |
ee890fe2 SS |
243 | return 1; |
244 | default: | |
245 | return 0; | |
246 | } | |
247 | } | |
248 | ||
ee890fe2 | 249 | void |
11abc112 | 250 | machopic_define_symbol (rtx mem) |
ee890fe2 | 251 | { |
11abc112 | 252 | rtx sym_ref; |
992d08b1 NS |
253 | |
254 | gcc_assert (GET_CODE (mem) == MEM); | |
11abc112 MM |
255 | sym_ref = XEXP (mem, 0); |
256 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; | |
ee890fe2 SS |
257 | } |
258 | ||
6788f5ca | 259 | static GTY(()) char * function_base; |
ee890fe2 | 260 | |
92c1a778 | 261 | const char * |
9c808aad | 262 | machopic_function_base_name (void) |
ee890fe2 | 263 | { |
ab82a49f | 264 | /* if dynamic-no-pic is on, we should not get here */ |
992d08b1 | 265 | gcc_assert (!MACHO_DYNAMIC_NO_PIC_P); |
ee890fe2 | 266 | |
1622229c | 267 | if (function_base == NULL) |
9c808aad | 268 | function_base = |
1622229c AP |
269 | (char *) ggc_alloc_string ("<pic base>", sizeof ("<pic base>")); |
270 | ||
271 | current_function_uses_pic_offset_table = 1; | |
272 | ||
273 | return function_base; | |
274 | } | |
275 | ||
11abc112 MM |
276 | /* Return a SYMBOL_REF for the PIC function base. */ |
277 | ||
278 | rtx | |
279 | machopic_function_base_sym (void) | |
280 | { | |
281 | rtx sym_ref; | |
282 | ||
283 | sym_ref = gen_rtx_SYMBOL_REF (Pmode, machopic_function_base_name ()); | |
284 | SYMBOL_REF_FLAGS (sym_ref) | |
285 | |= (MACHO_SYMBOL_FLAG_VARIABLE | MACHO_SYMBOL_FLAG_DEFINED); | |
286 | return sym_ref; | |
287 | } | |
288 | ||
14a07c92 PB |
289 | /* Return either ORIG or (const:P (minus:P ORIG PIC_BASE)), depending |
290 | on whether pic_base is NULL or not. */ | |
291 | static inline rtx | |
292 | gen_pic_offset (rtx orig, rtx pic_base) | |
293 | { | |
294 | if (!pic_base) | |
295 | return orig; | |
296 | else | |
297 | return gen_rtx_CONST (Pmode, gen_rtx_MINUS (Pmode, orig, pic_base)); | |
298 | } | |
299 | ||
1622229c AP |
300 | static GTY(()) const char * function_base_func_name; |
301 | static GTY(()) int current_pic_label_num; | |
302 | ||
303 | void | |
304 | machopic_output_function_base_name (FILE *file) | |
305 | { | |
306 | const char *current_name; | |
307 | ||
ff482c8d | 308 | /* If dynamic-no-pic is on, we should not get here. */ |
992d08b1 | 309 | gcc_assert (!MACHO_DYNAMIC_NO_PIC_P); |
9c808aad | 310 | current_name = |
1622229c | 311 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl)); |
6788f5ca | 312 | if (function_base_func_name != current_name) |
ee890fe2 | 313 | { |
ee890fe2 | 314 | ++current_pic_label_num; |
6788f5ca | 315 | function_base_func_name = current_name; |
ee890fe2 | 316 | } |
1622229c | 317 | fprintf (file, "\"L%011d$pb\"", current_pic_label_num); |
ee890fe2 SS |
318 | } |
319 | ||
11abc112 MM |
320 | /* The suffix attached to non-lazy pointer symbols. */ |
321 | #define NON_LAZY_POINTER_SUFFIX "$non_lazy_ptr" | |
322 | /* The suffix attached to stub symbols. */ | |
323 | #define STUB_SUFFIX "$stub" | |
ee890fe2 | 324 | |
11abc112 | 325 | typedef struct machopic_indirection GTY (()) |
ee890fe2 | 326 | { |
11abc112 MM |
327 | /* The SYMBOL_REF for the entity referenced. */ |
328 | rtx symbol; | |
1adaa117 GK |
329 | /* The name of the stub or non-lazy pointer. */ |
330 | const char * ptr_name; | |
11abc112 MM |
331 | /* True iff this entry is for a stub (as opposed to a non-lazy |
332 | pointer). */ | |
333 | bool stub_p; | |
334 | /* True iff this stub or pointer pointer has been referenced. */ | |
335 | bool used; | |
336 | } machopic_indirection; | |
337 | ||
338 | /* A table mapping stub names and non-lazy pointer names to | |
339 | SYMBOL_REFs for the stubbed-to and pointed-to entities. */ | |
340 | ||
341 | static GTY ((param_is (struct machopic_indirection))) htab_t | |
342 | machopic_indirections; | |
343 | ||
344 | /* Return a hash value for a SLOT in the indirections hash table. */ | |
345 | ||
346 | static hashval_t | |
347 | machopic_indirection_hash (const void *slot) | |
348 | { | |
349 | const machopic_indirection *p = (const machopic_indirection *) slot; | |
1adaa117 | 350 | return htab_hash_string (p->ptr_name); |
11abc112 | 351 | } |
9c808aad | 352 | |
11abc112 MM |
353 | /* Returns true if the KEY is the same as that associated with |
354 | SLOT. */ | |
355 | ||
356 | static int | |
357 | machopic_indirection_eq (const void *slot, const void *key) | |
358 | { | |
1adaa117 | 359 | return strcmp (((const machopic_indirection *) slot)->ptr_name, key) == 0; |
11abc112 | 360 | } |
ee890fe2 | 361 | |
11abc112 MM |
362 | /* Return the name of the non-lazy pointer (if STUB_P is false) or |
363 | stub (if STUB_B is true) corresponding to the given name. */ | |
df56a27f | 364 | |
11abc112 MM |
365 | const char * |
366 | machopic_indirection_name (rtx sym_ref, bool stub_p) | |
367 | { | |
368 | char *buffer; | |
369 | const char *name = XSTR (sym_ref, 0); | |
1adaa117 | 370 | size_t namelen = strlen (name); |
11abc112 | 371 | machopic_indirection *p; |
1adaa117 | 372 | void ** slot; |
3d20d4d8 MS |
373 | bool saw_star = false; |
374 | bool needs_quotes; | |
375 | const char *suffix; | |
376 | const char *prefix = user_label_prefix; | |
377 | const char *quote = ""; | |
0a6a4494 AO |
378 | tree id; |
379 | ||
380 | id = maybe_get_identifier (name); | |
381 | if (id) | |
382 | { | |
383 | tree id_orig = id; | |
384 | ||
385 | while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
386 | id = TREE_CHAIN (id); | |
387 | if (id != id_orig) | |
388 | { | |
389 | name = IDENTIFIER_POINTER (id); | |
390 | namelen = strlen (name); | |
391 | } | |
392 | } | |
11abc112 | 393 | |
3d20d4d8 | 394 | if (name[0] == '*') |
df56a27f | 395 | { |
3d20d4d8 MS |
396 | saw_star = true; |
397 | prefix = ""; | |
398 | ++name; | |
399 | --namelen; | |
11abc112 | 400 | } |
3d20d4d8 MS |
401 | |
402 | needs_quotes = name_needs_quotes (name); | |
403 | if (needs_quotes) | |
11abc112 | 404 | { |
3d20d4d8 | 405 | quote = "\""; |
df56a27f SS |
406 | } |
407 | ||
3d20d4d8 MS |
408 | if (stub_p) |
409 | suffix = STUB_SUFFIX; | |
410 | else | |
411 | suffix = NON_LAZY_POINTER_SUFFIX; | |
412 | ||
413 | buffer = alloca (strlen ("&L") | |
414 | + strlen (prefix) | |
415 | + namelen | |
416 | + strlen (suffix) | |
417 | + 2 * strlen (quote) | |
418 | + 1 /* '\0' */); | |
419 | ||
420 | /* Construct the name of the non-lazy pointer or stub. */ | |
421 | sprintf (buffer, "&%sL%s%s%s%s", quote, prefix, name, suffix, quote); | |
422 | ||
1adaa117 GK |
423 | if (!machopic_indirections) |
424 | machopic_indirections = htab_create_ggc (37, | |
425 | machopic_indirection_hash, | |
426 | machopic_indirection_eq, | |
427 | /*htab_del=*/NULL); | |
428 | ||
429 | slot = htab_find_slot_with_hash (machopic_indirections, buffer, | |
430 | htab_hash_string (buffer), INSERT); | |
431 | if (*slot) | |
432 | { | |
433 | p = (machopic_indirection *) *slot; | |
434 | } | |
435 | else | |
11abc112 | 436 | { |
11abc112 MM |
437 | p = (machopic_indirection *) ggc_alloc (sizeof (machopic_indirection)); |
438 | p->symbol = sym_ref; | |
1adaa117 | 439 | p->ptr_name = xstrdup (buffer); |
11abc112 | 440 | p->stub_p = stub_p; |
1adaa117 GK |
441 | p->used = false; |
442 | *slot = p; | |
11abc112 MM |
443 | } |
444 | ||
1adaa117 | 445 | return p->ptr_name; |
ee890fe2 SS |
446 | } |
447 | ||
11abc112 | 448 | /* Return the name of the stub for the mcount function. */ |
ee890fe2 | 449 | |
11abc112 MM |
450 | const char* |
451 | machopic_mcount_stub_name (void) | |
ee890fe2 | 452 | { |
76f60aa5 AP |
453 | rtx symbol = gen_rtx_SYMBOL_REF (Pmode, "*mcount"); |
454 | return machopic_indirection_name (symbol, /*stub_p=*/true); | |
ee890fe2 SS |
455 | } |
456 | ||
11abc112 MM |
457 | /* If NAME is the name of a stub or a non-lazy pointer , mark the stub |
458 | or non-lazy pointer as used -- and mark the object to which the | |
459 | pointer/stub refers as used as well, since the pointer/stub will | |
460 | emit a reference to it. */ | |
461 | ||
ee890fe2 | 462 | void |
11abc112 | 463 | machopic_validate_stub_or_non_lazy_ptr (const char *name) |
ee890fe2 | 464 | { |
11abc112 MM |
465 | machopic_indirection *p; |
466 | ||
467 | p = ((machopic_indirection *) | |
1adaa117 GK |
468 | (htab_find_with_hash (machopic_indirections, name, |
469 | htab_hash_string (name)))); | |
470 | if (p && ! p->used) | |
11abc112 | 471 | { |
1adaa117 GK |
472 | const char *real_name; |
473 | tree id; | |
474 | ||
475 | p->used = true; | |
476 | ||
ca472546 GK |
477 | /* Do what output_addr_const will do when we actually call it. */ |
478 | if (SYMBOL_REF_DECL (p->symbol)) | |
479 | mark_decl_referenced (SYMBOL_REF_DECL (p->symbol)); | |
480 | ||
481 | real_name = targetm.strip_name_encoding (XSTR (p->symbol, 0)); | |
1adaa117 GK |
482 | |
483 | id = maybe_get_identifier (real_name); | |
484 | if (id) | |
485 | mark_referenced (id); | |
11abc112 | 486 | } |
ee890fe2 SS |
487 | } |
488 | ||
489 | /* Transform ORIG, which may be any data source, to the corresponding | |
490 | source using indirections. */ | |
491 | ||
492 | rtx | |
9c808aad | 493 | machopic_indirect_data_reference (rtx orig, rtx reg) |
ee890fe2 SS |
494 | { |
495 | rtx ptr_ref = orig; | |
9c808aad | 496 | |
ee890fe2 SS |
497 | if (! MACHOPIC_INDIRECT) |
498 | return orig; | |
499 | ||
500 | if (GET_CODE (orig) == SYMBOL_REF) | |
501 | { | |
11abc112 | 502 | int defined = machopic_data_defined_p (orig); |
ab82a49f AP |
503 | |
504 | if (defined && MACHO_DYNAMIC_NO_PIC_P) | |
505 | { | |
506 | #if defined (TARGET_TOC) | |
4f8dbd34 AP |
507 | /* Create a new register for CSE opportunities. */ |
508 | rtx hi_reg = (no_new_pseudos ? reg : gen_reg_rtx (Pmode)); | |
509 | emit_insn (gen_macho_high (hi_reg, orig)); | |
510 | emit_insn (gen_macho_low (reg, hi_reg, orig)); | |
ab82a49f AP |
511 | #else |
512 | /* some other cpu -- writeme! */ | |
992d08b1 | 513 | gcc_unreachable (); |
ab82a49f AP |
514 | #endif |
515 | return reg; | |
516 | } | |
517 | else if (defined) | |
ee890fe2 | 518 | { |
7ae8cf75 | 519 | #if defined (TARGET_TOC) || defined (HAVE_lo_sum) |
11abc112 | 520 | rtx pic_base = machopic_function_base_sym (); |
14a07c92 | 521 | rtx offset = gen_pic_offset (orig, pic_base); |
7ae8cf75 | 522 | #endif |
ee890fe2 SS |
523 | |
524 | #if defined (TARGET_TOC) /* i.e., PowerPC */ | |
d9b46dfb | 525 | rtx hi_sum_reg = (no_new_pseudos ? reg : gen_reg_rtx (Pmode)); |
ee890fe2 | 526 | |
992d08b1 | 527 | gcc_assert (reg); |
ee890fe2 | 528 | |
6f94a68e GK |
529 | emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, |
530 | gen_rtx_PLUS (Pmode, pic_offset_table_rtx, | |
531 | gen_rtx_HIGH (Pmode, offset)))); | |
532 | emit_insn (gen_rtx_SET (Pmode, reg, | |
533 | gen_rtx_LO_SUM (Pmode, hi_sum_reg, offset))); | |
ee890fe2 SS |
534 | |
535 | orig = reg; | |
536 | #else | |
537 | #if defined (HAVE_lo_sum) | |
992d08b1 | 538 | gcc_assert (reg); |
ee890fe2 | 539 | |
6f94a68e GK |
540 | emit_insn (gen_rtx_SET (VOIDmode, reg, |
541 | gen_rtx_HIGH (Pmode, offset))); | |
542 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
543 | gen_rtx_LO_SUM (Pmode, reg, offset))); | |
544 | emit_insn (gen_rtx_USE (VOIDmode, pic_offset_table_rtx)); | |
ee890fe2 | 545 | |
6f94a68e | 546 | orig = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, reg); |
ee890fe2 SS |
547 | #endif |
548 | #endif | |
549 | return orig; | |
550 | } | |
551 | ||
828a4fe4 | 552 | ptr_ref = (gen_rtx_SYMBOL_REF |
11abc112 MM |
553 | (Pmode, |
554 | machopic_indirection_name (orig, /*stub_p=*/false))); | |
ee890fe2 | 555 | |
542a8afa | 556 | SYMBOL_REF_DECL (ptr_ref) = SYMBOL_REF_DECL (orig); |
c0d594f1 | 557 | |
542a8afa | 558 | ptr_ref = gen_const_mem (Pmode, ptr_ref); |
828a4fe4 | 559 | machopic_define_symbol (ptr_ref); |
ee890fe2 SS |
560 | |
561 | return ptr_ref; | |
562 | } | |
563 | else if (GET_CODE (orig) == CONST) | |
564 | { | |
565 | rtx base, result; | |
566 | ||
567 | /* legitimize both operands of the PLUS */ | |
568 | if (GET_CODE (XEXP (orig, 0)) == PLUS) | |
569 | { | |
570 | base = machopic_indirect_data_reference (XEXP (XEXP (orig, 0), 0), | |
571 | reg); | |
572 | orig = machopic_indirect_data_reference (XEXP (XEXP (orig, 0), 1), | |
573 | (base == reg ? 0 : reg)); | |
574 | } | |
9c808aad | 575 | else |
ee890fe2 SS |
576 | return orig; |
577 | ||
578 | if (MACHOPIC_PURE && GET_CODE (orig) == CONST_INT) | |
ed8908e7 | 579 | result = plus_constant (base, INTVAL (orig)); |
ee890fe2 | 580 | else |
6f94a68e | 581 | result = gen_rtx_PLUS (Pmode, base, orig); |
ee890fe2 | 582 | |
ee890fe2 SS |
583 | if (MACHOPIC_JUST_INDIRECT && GET_CODE (base) == MEM) |
584 | { | |
585 | if (reg) | |
586 | { | |
587 | emit_move_insn (reg, result); | |
588 | result = reg; | |
589 | } | |
590 | else | |
591 | { | |
592 | result = force_reg (GET_MODE (result), result); | |
593 | } | |
594 | } | |
595 | ||
596 | return result; | |
597 | ||
598 | } | |
599 | else if (GET_CODE (orig) == MEM) | |
600 | XEXP (ptr_ref, 0) = machopic_indirect_data_reference (XEXP (orig, 0), reg); | |
601 | /* When the target is i386, this code prevents crashes due to the | |
602 | compiler's ignorance on how to move the PIC base register to | |
603 | other registers. (The reload phase sometimes introduces such | |
604 | insns.) */ | |
605 | else if (GET_CODE (orig) == PLUS | |
606 | && GET_CODE (XEXP (orig, 0)) == REG | |
607 | && REGNO (XEXP (orig, 0)) == PIC_OFFSET_TABLE_REGNUM | |
608 | #ifdef I386 | |
609 | /* Prevent the same register from being erroneously used | |
610 | as both the base and index registers. */ | |
611 | && GET_CODE (XEXP (orig, 1)) == CONST | |
612 | #endif | |
613 | && reg) | |
614 | { | |
615 | emit_move_insn (reg, XEXP (orig, 0)); | |
616 | XEXP (ptr_ref, 0) = reg; | |
617 | } | |
618 | return ptr_ref; | |
619 | } | |
620 | ||
ee890fe2 SS |
621 | /* Transform TARGET (a MEM), which is a function call target, to the |
622 | corresponding symbol_stub if necessary. Return a new MEM. */ | |
623 | ||
624 | rtx | |
9c808aad | 625 | machopic_indirect_call_target (rtx target) |
ee890fe2 SS |
626 | { |
627 | if (GET_CODE (target) != MEM) | |
628 | return target; | |
629 | ||
11abc112 MM |
630 | if (MACHOPIC_INDIRECT |
631 | && GET_CODE (XEXP (target, 0)) == SYMBOL_REF | |
632 | && !(SYMBOL_REF_FLAGS (XEXP (target, 0)) | |
633 | & MACHO_SYMBOL_FLAG_DEFINED)) | |
9c808aad | 634 | { |
11abc112 MM |
635 | rtx sym_ref = XEXP (target, 0); |
636 | const char *stub_name = machopic_indirection_name (sym_ref, | |
637 | /*stub_p=*/true); | |
638 | enum machine_mode mode = GET_MODE (sym_ref); | |
639 | tree decl = SYMBOL_REF_DECL (sym_ref); | |
640 | ||
641 | XEXP (target, 0) = gen_rtx_SYMBOL_REF (mode, stub_name); | |
642 | SYMBOL_REF_DECL (XEXP (target, 0)) = decl; | |
389fdba0 | 643 | MEM_READONLY_P (target) = 1; |
542a8afa | 644 | MEM_NOTRAP_P (target) = 1; |
ee890fe2 SS |
645 | } |
646 | ||
647 | return target; | |
648 | } | |
649 | ||
650 | rtx | |
9c808aad | 651 | machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg) |
ee890fe2 SS |
652 | { |
653 | rtx pic_ref = orig; | |
654 | ||
ab82a49f | 655 | if (! MACHOPIC_INDIRECT) |
ee890fe2 SS |
656 | return orig; |
657 | ||
658 | /* First handle a simple SYMBOL_REF or LABEL_REF */ | |
659 | if (GET_CODE (orig) == LABEL_REF | |
660 | || (GET_CODE (orig) == SYMBOL_REF | |
661 | )) | |
662 | { | |
663 | /* addr(foo) = &func+(foo-func) */ | |
664 | rtx pic_base; | |
665 | ||
666 | orig = machopic_indirect_data_reference (orig, reg); | |
667 | ||
9c808aad | 668 | if (GET_CODE (orig) == PLUS |
ee890fe2 SS |
669 | && GET_CODE (XEXP (orig, 0)) == REG) |
670 | { | |
671 | if (reg == 0) | |
672 | return force_reg (mode, orig); | |
673 | ||
674 | emit_move_insn (reg, orig); | |
675 | return reg; | |
9c808aad | 676 | } |
ee890fe2 | 677 | |
14a07c92 | 678 | /* if dynamic-no-pic we don't have a pic base */ |
ab82a49f | 679 | if (MACHO_DYNAMIC_NO_PIC_P) |
14a07c92 | 680 | pic_base = NULL; |
ab82a49f | 681 | else |
11abc112 | 682 | pic_base = machopic_function_base_sym (); |
ee890fe2 SS |
683 | |
684 | if (GET_CODE (orig) == MEM) | |
685 | { | |
686 | if (reg == 0) | |
687 | { | |
992d08b1 NS |
688 | gcc_assert (!reload_in_progress); |
689 | reg = gen_reg_rtx (Pmode); | |
ee890fe2 | 690 | } |
9c808aad | 691 | |
ee890fe2 | 692 | #ifdef HAVE_lo_sum |
ab82a49f AP |
693 | if (MACHO_DYNAMIC_NO_PIC_P |
694 | && (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
695 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF)) | |
696 | { | |
697 | #if defined (TARGET_TOC) /* ppc */ | |
698 | rtx temp_reg = (no_new_pseudos) ? reg : gen_reg_rtx (Pmode); | |
699 | rtx asym = XEXP (orig, 0); | |
700 | rtx mem; | |
701 | ||
b8a55285 | 702 | emit_insn (gen_macho_high (temp_reg, asym)); |
542a8afa RH |
703 | mem = gen_const_mem (GET_MODE (orig), |
704 | gen_rtx_LO_SUM (Pmode, temp_reg, asym)); | |
6f94a68e | 705 | emit_insn (gen_rtx_SET (VOIDmode, reg, mem)); |
ab82a49f AP |
706 | #else |
707 | /* Some other CPU -- WriteMe! but right now there are no other platform that can use dynamic-no-pic */ | |
992d08b1 | 708 | gcc_unreachable (); |
ab82a49f AP |
709 | #endif |
710 | pic_ref = reg; | |
711 | } | |
712 | else | |
9c808aad | 713 | if (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF |
ee890fe2 SS |
714 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) |
715 | { | |
14a07c92 | 716 | rtx offset = gen_pic_offset (XEXP (orig, 0), pic_base); |
ee890fe2 SS |
717 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
718 | /* Generating a new reg may expose opportunities for | |
719 | common subexpression elimination. */ | |
49bd1d27 | 720 | rtx hi_sum_reg = no_new_pseudos ? reg : gen_reg_rtx (Pmode); |
6f94a68e GK |
721 | rtx mem; |
722 | rtx insn; | |
723 | rtx sum; | |
724 | ||
725 | sum = gen_rtx_HIGH (Pmode, offset); | |
726 | if (! MACHO_DYNAMIC_NO_PIC_P) | |
727 | sum = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, sum); | |
ee890fe2 | 728 | |
6f94a68e GK |
729 | emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, sum)); |
730 | ||
542a8afa RH |
731 | mem = gen_const_mem (GET_MODE (orig), |
732 | gen_rtx_LO_SUM (Pmode, | |
733 | hi_sum_reg, offset)); | |
6f94a68e GK |
734 | insn = emit_insn (gen_rtx_SET (VOIDmode, reg, mem)); |
735 | REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_EQUAL, pic_ref, | |
736 | REG_NOTES (insn)); | |
737 | ||
738 | pic_ref = reg; | |
ee890fe2 | 739 | #else |
6f94a68e GK |
740 | emit_insn (gen_rtx_USE (VOIDmode, |
741 | gen_rtx_REG (Pmode, | |
742 | PIC_OFFSET_TABLE_REGNUM))); | |
743 | ||
744 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
745 | gen_rtx_HIGH (Pmode, | |
746 | gen_rtx_CONST (Pmode, | |
747 | offset)))); | |
748 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
749 | gen_rtx_LO_SUM (Pmode, reg, | |
750 | gen_rtx_CONST (Pmode, offset)))); | |
751 | pic_ref = gen_rtx_PLUS (Pmode, | |
752 | pic_offset_table_rtx, reg); | |
ee890fe2 SS |
753 | #endif |
754 | } | |
755 | else | |
756 | #endif /* HAVE_lo_sum */ | |
757 | { | |
758 | rtx pic = pic_offset_table_rtx; | |
759 | if (GET_CODE (pic) != REG) | |
760 | { | |
761 | emit_move_insn (reg, pic); | |
762 | pic = reg; | |
763 | } | |
764 | #if 0 | |
6f94a68e GK |
765 | emit_insn (gen_rtx_USE (VOIDmode, |
766 | gen_rtx_REG (Pmode, | |
767 | PIC_OFFSET_TABLE_REGNUM))); | |
ee890fe2 SS |
768 | #endif |
769 | ||
14a07c92 PB |
770 | pic_ref = gen_rtx_PLUS (Pmode, pic, |
771 | gen_pic_offset (XEXP (orig, 0), | |
772 | pic_base)); | |
ee890fe2 | 773 | } |
9c808aad | 774 | |
ee890fe2 | 775 | #if !defined (TARGET_TOC) |
ee890fe2 | 776 | emit_move_insn (reg, pic_ref); |
542a8afa | 777 | pic_ref = gen_const_mem (GET_MODE (orig), reg); |
f9b0ac3b | 778 | #endif |
ee890fe2 SS |
779 | } |
780 | else | |
781 | { | |
782 | ||
783 | #ifdef HAVE_lo_sum | |
9c808aad | 784 | if (GET_CODE (orig) == SYMBOL_REF |
ee890fe2 SS |
785 | || GET_CODE (orig) == LABEL_REF) |
786 | { | |
14a07c92 | 787 | rtx offset = gen_pic_offset (orig, pic_base); |
ee890fe2 SS |
788 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
789 | rtx hi_sum_reg; | |
790 | ||
791 | if (reg == 0) | |
792 | { | |
992d08b1 NS |
793 | gcc_assert (!reload_in_progress); |
794 | reg = gen_reg_rtx (Pmode); | |
ee890fe2 | 795 | } |
9c808aad | 796 | |
ee890fe2 SS |
797 | hi_sum_reg = reg; |
798 | ||
6f94a68e GK |
799 | emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, |
800 | (MACHO_DYNAMIC_NO_PIC_P) | |
801 | ? gen_rtx_HIGH (Pmode, offset) | |
802 | : gen_rtx_PLUS (Pmode, | |
803 | pic_offset_table_rtx, | |
804 | gen_rtx_HIGH (Pmode, | |
805 | offset)))); | |
806 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
807 | gen_rtx_LO_SUM (Pmode, | |
808 | hi_sum_reg, offset))); | |
ee890fe2 SS |
809 | pic_ref = reg; |
810 | #else | |
6f94a68e GK |
811 | emit_insn (gen_rtx_SET (VOIDmode, reg, |
812 | gen_rtx_HIGH (Pmode, offset))); | |
813 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
814 | gen_rtx_LO_SUM (Pmode, reg, offset))); | |
815 | pic_ref = gen_rtx_PLUS (Pmode, | |
816 | pic_offset_table_rtx, reg); | |
ee890fe2 SS |
817 | #endif |
818 | } | |
819 | else | |
820 | #endif /* HAVE_lo_sum */ | |
821 | { | |
83cf88cb AP |
822 | if (REG_P (orig) |
823 | || GET_CODE (orig) == SUBREG) | |
ee890fe2 SS |
824 | { |
825 | return orig; | |
826 | } | |
827 | else | |
828 | { | |
829 | rtx pic = pic_offset_table_rtx; | |
830 | if (GET_CODE (pic) != REG) | |
831 | { | |
832 | emit_move_insn (reg, pic); | |
833 | pic = reg; | |
834 | } | |
835 | #if 0 | |
6f94a68e GK |
836 | emit_insn (gen_rtx_USE (VOIDmode, |
837 | pic_offset_table_rtx)); | |
ee890fe2 | 838 | #endif |
6f94a68e GK |
839 | pic_ref = gen_rtx_PLUS (Pmode, |
840 | pic, | |
14a07c92 | 841 | gen_pic_offset (orig, pic_base)); |
ee890fe2 SS |
842 | } |
843 | } | |
844 | } | |
845 | ||
ee890fe2 SS |
846 | if (GET_CODE (pic_ref) != REG) |
847 | { | |
848 | if (reg != 0) | |
849 | { | |
850 | emit_move_insn (reg, pic_ref); | |
851 | return reg; | |
852 | } | |
853 | else | |
854 | { | |
855 | return force_reg (mode, pic_ref); | |
856 | } | |
857 | } | |
858 | else | |
859 | { | |
860 | return pic_ref; | |
861 | } | |
862 | } | |
863 | ||
864 | else if (GET_CODE (orig) == SYMBOL_REF) | |
865 | return orig; | |
866 | ||
867 | else if (GET_CODE (orig) == PLUS | |
868 | && (GET_CODE (XEXP (orig, 0)) == MEM | |
869 | || GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
870 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) | |
871 | && XEXP (orig, 0) != pic_offset_table_rtx | |
872 | && GET_CODE (XEXP (orig, 1)) != REG) | |
9c808aad | 873 | |
ee890fe2 SS |
874 | { |
875 | rtx base; | |
876 | int is_complex = (GET_CODE (XEXP (orig, 0)) == MEM); | |
877 | ||
878 | base = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
879 | orig = machopic_legitimize_pic_address (XEXP (orig, 1), | |
880 | Pmode, (base == reg ? 0 : reg)); | |
881 | if (GET_CODE (orig) == CONST_INT) | |
882 | { | |
ed8908e7 | 883 | pic_ref = plus_constant (base, INTVAL (orig)); |
ee890fe2 SS |
884 | is_complex = 1; |
885 | } | |
886 | else | |
6f94a68e | 887 | pic_ref = gen_rtx_PLUS (Pmode, base, orig); |
ee890fe2 | 888 | |
ee890fe2 SS |
889 | if (reg && is_complex) |
890 | { | |
891 | emit_move_insn (reg, pic_ref); | |
892 | pic_ref = reg; | |
893 | } | |
894 | /* Likewise, should we set special REG_NOTEs here? */ | |
895 | } | |
896 | ||
897 | else if (GET_CODE (orig) == CONST) | |
898 | { | |
899 | return machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
900 | } | |
901 | ||
902 | else if (GET_CODE (orig) == MEM | |
903 | && GET_CODE (XEXP (orig, 0)) == SYMBOL_REF) | |
904 | { | |
905 | rtx addr = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
389fdba0 | 906 | addr = replace_equiv_address (orig, addr); |
ee890fe2 SS |
907 | emit_move_insn (reg, addr); |
908 | pic_ref = reg; | |
909 | } | |
910 | ||
911 | return pic_ref; | |
912 | } | |
913 | ||
11abc112 MM |
914 | /* Output the stub or non-lazy pointer in *SLOT, if it has been used. |
915 | DATA is the FILE* for assembly output. Called from | |
916 | htab_traverse. */ | |
ee890fe2 | 917 | |
11abc112 MM |
918 | static int |
919 | machopic_output_indirection (void **slot, void *data) | |
ee890fe2 | 920 | { |
11abc112 MM |
921 | machopic_indirection *p = *((machopic_indirection **) slot); |
922 | FILE *asm_out_file = (FILE *) data; | |
923 | rtx symbol; | |
924 | const char *sym_name; | |
925 | const char *ptr_name; | |
926 | ||
927 | if (!p->used) | |
928 | return 1; | |
ee890fe2 | 929 | |
11abc112 MM |
930 | symbol = p->symbol; |
931 | sym_name = XSTR (symbol, 0); | |
1adaa117 | 932 | ptr_name = p->ptr_name; |
11abc112 MM |
933 | |
934 | if (p->stub_p) | |
ee890fe2 | 935 | { |
ee890fe2 SS |
936 | char *sym; |
937 | char *stub; | |
0a6a4494 AO |
938 | tree id; |
939 | ||
940 | id = maybe_get_identifier (sym_name); | |
941 | if (id) | |
942 | { | |
943 | tree id_orig = id; | |
944 | ||
945 | while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
946 | id = TREE_CHAIN (id); | |
947 | if (id != id_orig) | |
948 | sym_name = IDENTIFIER_POINTER (id); | |
949 | } | |
ee890fe2 | 950 | |
ee890fe2 SS |
951 | sym = alloca (strlen (sym_name) + 2); |
952 | if (sym_name[0] == '*' || sym_name[0] == '&') | |
953 | strcpy (sym, sym_name + 1); | |
954 | else if (sym_name[0] == '-' || sym_name[0] == '+') | |
9c808aad | 955 | strcpy (sym, sym_name); |
ee890fe2 | 956 | else |
789a4ea3 | 957 | sprintf (sym, "%s%s", user_label_prefix, sym_name); |
ee890fe2 | 958 | |
11abc112 MM |
959 | stub = alloca (strlen (ptr_name) + 2); |
960 | if (ptr_name[0] == '*' || ptr_name[0] == '&') | |
961 | strcpy (stub, ptr_name + 1); | |
ee890fe2 | 962 | else |
11abc112 | 963 | sprintf (stub, "%s%s", user_label_prefix, ptr_name); |
ee890fe2 | 964 | |
ca472546 | 965 | machopic_output_stub (asm_out_file, sym, stub); |
ee890fe2 | 966 | } |
699c914a | 967 | else if (! indirect_data (symbol) |
156a126c MS |
968 | && (machopic_symbol_defined_p (symbol) |
969 | || SYMBOL_REF_LOCAL_P (symbol))) | |
ee890fe2 | 970 | { |
d6b5193b | 971 | switch_to_section (data_section); |
11abc112 MM |
972 | assemble_align (GET_MODE_ALIGNMENT (Pmode)); |
973 | assemble_label (ptr_name); | |
974 | assemble_integer (gen_rtx_SYMBOL_REF (Pmode, sym_name), | |
975 | GET_MODE_SIZE (Pmode), | |
976 | GET_MODE_ALIGNMENT (Pmode), 1); | |
ee890fe2 | 977 | } |
11abc112 MM |
978 | else |
979 | { | |
699c914a MS |
980 | rtx init = const0_rtx; |
981 | ||
d6b5193b | 982 | switch_to_section (machopic_nl_symbol_ptr_section); |
11abc112 MM |
983 | assemble_name (asm_out_file, ptr_name); |
984 | fprintf (asm_out_file, ":\n"); | |
985 | ||
986 | fprintf (asm_out_file, "\t.indirect_symbol "); | |
987 | assemble_name (asm_out_file, sym_name); | |
988 | fprintf (asm_out_file, "\n"); | |
989 | ||
699c914a MS |
990 | /* Variables that are marked with MACHO_SYMBOL_STATIC need to |
991 | have their symbol name instead of 0 in the second entry of | |
992 | the non-lazy symbol pointer data structure when they are | |
993 | defined. This allows the runtime to rebind newer instances | |
994 | of the translation unit with the original instance of the | |
d6ff8575 | 995 | symbol. */ |
699c914a MS |
996 | |
997 | if ((SYMBOL_REF_FLAGS (symbol) & MACHO_SYMBOL_STATIC) | |
998 | && machopic_symbol_defined_p (symbol)) | |
999 | init = gen_rtx_SYMBOL_REF (Pmode, sym_name); | |
1000 | ||
1001 | assemble_integer (init, GET_MODE_SIZE (Pmode), | |
11abc112 MM |
1002 | GET_MODE_ALIGNMENT (Pmode), 1); |
1003 | } | |
1004 | ||
1005 | return 1; | |
1006 | } | |
1007 | ||
1008 | void | |
1009 | machopic_finish (FILE *asm_out_file) | |
1010 | { | |
1011 | if (machopic_indirections) | |
699c914a | 1012 | htab_traverse_noresize (machopic_indirections, |
11abc112 MM |
1013 | machopic_output_indirection, |
1014 | asm_out_file); | |
ee890fe2 SS |
1015 | } |
1016 | ||
9c808aad AJ |
1017 | int |
1018 | machopic_operand_p (rtx op) | |
ee890fe2 SS |
1019 | { |
1020 | if (MACHOPIC_JUST_INDIRECT) | |
1021 | { | |
1022 | while (GET_CODE (op) == CONST) | |
1023 | op = XEXP (op, 0); | |
1024 | ||
1025 | if (GET_CODE (op) == SYMBOL_REF) | |
11abc112 | 1026 | return machopic_symbol_defined_p (op); |
ee890fe2 SS |
1027 | else |
1028 | return 0; | |
1029 | } | |
1030 | ||
1031 | while (GET_CODE (op) == CONST) | |
1032 | op = XEXP (op, 0); | |
1033 | ||
1034 | if (GET_CODE (op) == MINUS | |
1035 | && GET_CODE (XEXP (op, 0)) == SYMBOL_REF | |
1036 | && GET_CODE (XEXP (op, 1)) == SYMBOL_REF | |
11abc112 MM |
1037 | && machopic_symbol_defined_p (XEXP (op, 0)) |
1038 | && machopic_symbol_defined_p (XEXP (op, 1))) | |
ee890fe2 SS |
1039 | return 1; |
1040 | ||
ee890fe2 SS |
1041 | return 0; |
1042 | } | |
df56a27f SS |
1043 | |
1044 | /* This function records whether a given name corresponds to a defined | |
1045 | or undefined function or variable, for machopic_classify_ident to | |
1046 | use later. */ | |
1047 | ||
1048 | void | |
9c808aad | 1049 | darwin_encode_section_info (tree decl, rtx rtl, int first ATTRIBUTE_UNUSED) |
df56a27f | 1050 | { |
353e51f8 | 1051 | rtx sym_ref; |
df56a27f | 1052 | |
e1a4211d SS |
1053 | /* Do the standard encoding things first. */ |
1054 | default_encode_section_info (decl, rtl, first); | |
1055 | ||
11abc112 MM |
1056 | if (TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL) |
1057 | return; | |
e1a4211d | 1058 | |
11abc112 MM |
1059 | sym_ref = XEXP (rtl, 0); |
1060 | if (TREE_CODE (decl) == VAR_DECL) | |
1061 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_VARIABLE; | |
1062 | ||
1063 | if (!DECL_EXTERNAL (decl) | |
f1a66265 | 1064 | && (!TREE_PUBLIC (decl) || !DECL_WEAK (decl)) |
a9b0b825 | 1065 | && ! lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)) |
df56a27f SS |
1066 | && ((TREE_STATIC (decl) |
1067 | && (!DECL_COMMON (decl) || !TREE_PUBLIC (decl))) | |
bfbdca0b | 1068 | || (!DECL_COMMON (decl) && DECL_INITIAL (decl) |
abe72dd8 | 1069 | && DECL_INITIAL (decl) != error_mark_node))) |
11abc112 | 1070 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; |
699c914a | 1071 | |
d6ff8575 | 1072 | if (! TREE_PUBLIC (decl)) |
699c914a | 1073 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_STATIC; |
4e08ba6c | 1074 | } |
2cc07db4 | 1075 | |
8e3e233b DP |
1076 | void |
1077 | darwin_mark_decl_preserved (const char *name) | |
1078 | { | |
1079 | fprintf (asm_out_file, ".no_dead_strip "); | |
1080 | assemble_name (asm_out_file, name); | |
1081 | fputc ('\n', asm_out_file); | |
1082 | } | |
1083 | ||
d6b5193b | 1084 | section * |
9c808aad AJ |
1085 | machopic_select_section (tree exp, int reloc, |
1086 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
ae46c4e0 | 1087 | { |
d6b5193b | 1088 | section *base_section; |
0f9bc2d6 GK |
1089 | bool weak_p = (DECL_P (exp) && DECL_WEAK (exp) |
1090 | && (lookup_attribute ("weak", DECL_ATTRIBUTES (exp)) | |
1091 | || ! lookup_attribute ("weak_import", | |
1092 | DECL_ATTRIBUTES (exp)))); | |
d6b5193b | 1093 | |
f1a66265 | 1094 | if (TREE_CODE (exp) == FUNCTION_DECL) |
d6b5193b RS |
1095 | { |
1096 | if (reloc == 1 | |
1097 | || unlikely_text_section_p (last_text_section) | |
1098 | || last_text_section == text_unlikely_coal_section) | |
1099 | base_section = (weak_p | |
1100 | ? text_unlikely_coal_section | |
1101 | : unlikely_text_section ()); | |
1102 | else | |
1103 | base_section = weak_p ? text_coal_section : text_section; | |
1104 | } | |
f1a66265 | 1105 | else if (decl_readonly_section_1 (exp, reloc, MACHOPIC_INDIRECT)) |
d6b5193b | 1106 | base_section = weak_p ? const_coal_section : const_section; |
3d7964d5 | 1107 | else if (TREE_READONLY (exp) || TREE_CONSTANT (exp)) |
d6b5193b | 1108 | base_section = weak_p ? const_data_coal_section : const_data_section; |
3d7964d5 | 1109 | else |
d6b5193b | 1110 | base_section = weak_p ? data_coal_section : data_section; |
9c808aad | 1111 | |
3d7964d5 | 1112 | if (TREE_CODE (exp) == STRING_CST |
9c808aad | 1113 | && ((size_t) TREE_STRING_LENGTH (exp) |
3521b33c | 1114 | == strlen (TREE_STRING_POINTER (exp)) + 1)) |
d6b5193b | 1115 | return cstring_section; |
3d7964d5 GK |
1116 | else if ((TREE_CODE (exp) == INTEGER_CST || TREE_CODE (exp) == REAL_CST) |
1117 | && flag_merge_constants) | |
ae46c4e0 | 1118 | { |
e1e04267 | 1119 | tree size = TYPE_SIZE_UNIT (TREE_TYPE (exp)); |
ae46c4e0 RH |
1120 | |
1121 | if (TREE_CODE (size) == INTEGER_CST && | |
1122 | TREE_INT_CST_LOW (size) == 4 && | |
1123 | TREE_INT_CST_HIGH (size) == 0) | |
d6b5193b | 1124 | return literal4_section; |
ae46c4e0 RH |
1125 | else if (TREE_CODE (size) == INTEGER_CST && |
1126 | TREE_INT_CST_LOW (size) == 8 && | |
1127 | TREE_INT_CST_HIGH (size) == 0) | |
d6b5193b | 1128 | return literal8_section; |
ae46c4e0 | 1129 | else |
d6b5193b | 1130 | return base_section; |
ae46c4e0 RH |
1131 | } |
1132 | else if (TREE_CODE (exp) == CONSTRUCTOR | |
1133 | && TREE_TYPE (exp) | |
1134 | && TREE_CODE (TREE_TYPE (exp)) == RECORD_TYPE | |
1135 | && TYPE_NAME (TREE_TYPE (exp))) | |
1136 | { | |
1137 | tree name = TYPE_NAME (TREE_TYPE (exp)); | |
1138 | if (TREE_CODE (name) == TYPE_DECL) | |
1139 | name = DECL_NAME (name); | |
c64de75f ZL |
1140 | |
1141 | if (!strcmp (IDENTIFIER_POINTER (name), "__builtin_ObjCString")) | |
1142 | { | |
1143 | if (flag_next_runtime) | |
d6b5193b | 1144 | return objc_constant_string_object_section; |
c64de75f | 1145 | else |
d6b5193b | 1146 | return objc_string_object_section; |
c64de75f | 1147 | } |
ae46c4e0 | 1148 | else |
d6b5193b | 1149 | return base_section; |
ae46c4e0 RH |
1150 | } |
1151 | else if (TREE_CODE (exp) == VAR_DECL && | |
1152 | DECL_NAME (exp) && | |
1153 | TREE_CODE (DECL_NAME (exp)) == IDENTIFIER_NODE && | |
1154 | IDENTIFIER_POINTER (DECL_NAME (exp)) && | |
1155 | !strncmp (IDENTIFIER_POINTER (DECL_NAME (exp)), "_OBJC_", 6)) | |
1156 | { | |
1157 | const char *name = IDENTIFIER_POINTER (DECL_NAME (exp)); | |
1158 | ||
1159 | if (!strncmp (name, "_OBJC_CLASS_METHODS_", 20)) | |
d6b5193b | 1160 | return objc_cls_meth_section; |
ae46c4e0 | 1161 | else if (!strncmp (name, "_OBJC_INSTANCE_METHODS_", 23)) |
d6b5193b | 1162 | return objc_inst_meth_section; |
ae46c4e0 | 1163 | else if (!strncmp (name, "_OBJC_CATEGORY_CLASS_METHODS_", 20)) |
d6b5193b | 1164 | return objc_cat_cls_meth_section; |
ae46c4e0 | 1165 | else if (!strncmp (name, "_OBJC_CATEGORY_INSTANCE_METHODS_", 23)) |
d6b5193b | 1166 | return objc_cat_inst_meth_section; |
ae46c4e0 | 1167 | else if (!strncmp (name, "_OBJC_CLASS_VARIABLES_", 22)) |
d6b5193b | 1168 | return objc_class_vars_section; |
ae46c4e0 | 1169 | else if (!strncmp (name, "_OBJC_INSTANCE_VARIABLES_", 25)) |
d6b5193b | 1170 | return objc_instance_vars_section; |
ae46c4e0 | 1171 | else if (!strncmp (name, "_OBJC_CLASS_PROTOCOLS_", 22)) |
d6b5193b | 1172 | return objc_cat_cls_meth_section; |
ae46c4e0 | 1173 | else if (!strncmp (name, "_OBJC_CLASS_NAME_", 17)) |
d6b5193b | 1174 | return objc_class_names_section; |
ae46c4e0 | 1175 | else if (!strncmp (name, "_OBJC_METH_VAR_NAME_", 20)) |
d6b5193b | 1176 | return objc_meth_var_names_section; |
ae46c4e0 | 1177 | else if (!strncmp (name, "_OBJC_METH_VAR_TYPE_", 20)) |
d6b5193b | 1178 | return objc_meth_var_types_section; |
ae46c4e0 | 1179 | else if (!strncmp (name, "_OBJC_CLASS_REFERENCES", 22)) |
d6b5193b | 1180 | return objc_cls_refs_section; |
ae46c4e0 | 1181 | else if (!strncmp (name, "_OBJC_CLASS_", 12)) |
d6b5193b | 1182 | return objc_class_section; |
ae46c4e0 | 1183 | else if (!strncmp (name, "_OBJC_METACLASS_", 16)) |
d6b5193b | 1184 | return objc_meta_class_section; |
ae46c4e0 | 1185 | else if (!strncmp (name, "_OBJC_CATEGORY_", 15)) |
d6b5193b | 1186 | return objc_category_section; |
ae46c4e0 | 1187 | else if (!strncmp (name, "_OBJC_SELECTOR_REFERENCES", 25)) |
d6b5193b | 1188 | return objc_selector_refs_section; |
ae46c4e0 | 1189 | else if (!strncmp (name, "_OBJC_SELECTOR_FIXUP", 20)) |
d6b5193b | 1190 | return objc_selector_fixup_section; |
ae46c4e0 | 1191 | else if (!strncmp (name, "_OBJC_SYMBOLS", 13)) |
d6b5193b | 1192 | return objc_symbols_section; |
ae46c4e0 | 1193 | else if (!strncmp (name, "_OBJC_MODULES", 13)) |
d6b5193b | 1194 | return objc_module_info_section; |
264fa2db | 1195 | else if (!strncmp (name, "_OBJC_IMAGE_INFO", 16)) |
d6b5193b | 1196 | return objc_image_info_section; |
ae46c4e0 | 1197 | else if (!strncmp (name, "_OBJC_PROTOCOL_INSTANCE_METHODS_", 32)) |
d6b5193b | 1198 | return objc_cat_inst_meth_section; |
ae46c4e0 | 1199 | else if (!strncmp (name, "_OBJC_PROTOCOL_CLASS_METHODS_", 29)) |
d6b5193b | 1200 | return objc_cat_cls_meth_section; |
ae46c4e0 | 1201 | else if (!strncmp (name, "_OBJC_PROTOCOL_REFS_", 20)) |
d6b5193b | 1202 | return objc_cat_cls_meth_section; |
ae46c4e0 | 1203 | else if (!strncmp (name, "_OBJC_PROTOCOL_", 15)) |
d6b5193b | 1204 | return objc_protocol_section; |
ae46c4e0 | 1205 | else |
d6b5193b | 1206 | return base_section; |
ae46c4e0 RH |
1207 | } |
1208 | else | |
d6b5193b | 1209 | return base_section; |
ae46c4e0 RH |
1210 | } |
1211 | ||
b64a1b53 | 1212 | /* This can be called with address expressions as "rtx". |
991b6592 | 1213 | They must go in "const". */ |
b64a1b53 | 1214 | |
d6b5193b | 1215 | section * |
9c808aad AJ |
1216 | machopic_select_rtx_section (enum machine_mode mode, rtx x, |
1217 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
b64a1b53 | 1218 | { |
b79d4265 SS |
1219 | if (GET_MODE_SIZE (mode) == 8 |
1220 | && (GET_CODE (x) == CONST_INT | |
1221 | || GET_CODE (x) == CONST_DOUBLE)) | |
d6b5193b | 1222 | return literal8_section; |
b64a1b53 RH |
1223 | else if (GET_MODE_SIZE (mode) == 4 |
1224 | && (GET_CODE (x) == CONST_INT | |
1225 | || GET_CODE (x) == CONST_DOUBLE)) | |
d6b5193b | 1226 | return literal4_section; |
86b0a4f3 | 1227 | else if (MACHOPIC_INDIRECT |
2e53734e GK |
1228 | && (GET_CODE (x) == SYMBOL_REF |
1229 | || GET_CODE (x) == CONST | |
1230 | || GET_CODE (x) == LABEL_REF)) | |
d6b5193b | 1231 | return const_data_section; |
b64a1b53 | 1232 | else |
d6b5193b | 1233 | return const_section; |
b64a1b53 RH |
1234 | } |
1235 | ||
2cc07db4 | 1236 | void |
9c808aad | 1237 | machopic_asm_out_constructor (rtx symbol, int priority ATTRIBUTE_UNUSED) |
2cc07db4 | 1238 | { |
ab82a49f | 1239 | if (MACHOPIC_INDIRECT) |
d6b5193b | 1240 | switch_to_section (mod_init_section); |
2cc07db4 | 1241 | else |
d6b5193b | 1242 | switch_to_section (constructor_section); |
c8af3574 RH |
1243 | assemble_align (POINTER_SIZE); |
1244 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
2cc07db4 | 1245 | |
ab82a49f | 1246 | if (! MACHOPIC_INDIRECT) |
2cc07db4 RH |
1247 | fprintf (asm_out_file, ".reference .constructors_used\n"); |
1248 | } | |
1249 | ||
1250 | void | |
9c808aad | 1251 | machopic_asm_out_destructor (rtx symbol, int priority ATTRIBUTE_UNUSED) |
2cc07db4 | 1252 | { |
ab82a49f | 1253 | if (MACHOPIC_INDIRECT) |
d6b5193b | 1254 | switch_to_section (mod_term_section); |
2cc07db4 | 1255 | else |
d6b5193b | 1256 | switch_to_section (destructor_section); |
c8af3574 RH |
1257 | assemble_align (POINTER_SIZE); |
1258 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
2cc07db4 | 1259 | |
ab82a49f | 1260 | if (! MACHOPIC_INDIRECT) |
2cc07db4 RH |
1261 | fprintf (asm_out_file, ".reference .destructors_used\n"); |
1262 | } | |
e2500fed | 1263 | |
5eb99654 | 1264 | void |
9c808aad | 1265 | darwin_globalize_label (FILE *stream, const char *name) |
5eb99654 KG |
1266 | { |
1267 | if (!!strncmp (name, "_OBJC_", 6)) | |
1268 | default_globalize_label (stream, name); | |
1269 | } | |
1270 | ||
4746cf84 | 1271 | void |
c18a5b6c MM |
1272 | darwin_asm_named_section (const char *name, |
1273 | unsigned int flags ATTRIBUTE_UNUSED, | |
1274 | tree decl ATTRIBUTE_UNUSED) | |
4746cf84 | 1275 | { |
f1a66265 | 1276 | fprintf (asm_out_file, "\t.section %s\n", name); |
4746cf84 MA |
1277 | } |
1278 | ||
4746cf84 | 1279 | void |
f1a66265 | 1280 | darwin_unique_section (tree decl ATTRIBUTE_UNUSED, int reloc ATTRIBUTE_UNUSED) |
4746cf84 | 1281 | { |
f1a66265 | 1282 | /* Darwin does not use unique sections. */ |
4746cf84 MA |
1283 | } |
1284 | ||
005c1a13 GK |
1285 | /* Handle a "weak_import" attribute; arguments as in |
1286 | struct attribute_spec.handler. */ | |
1287 | ||
1288 | tree | |
1289 | darwin_handle_weak_import_attribute (tree *node, tree name, | |
1290 | tree ARG_UNUSED (args), | |
1291 | int ARG_UNUSED (flags), | |
1292 | bool * no_add_attrs) | |
1293 | { | |
d7001ae5 | 1294 | if (TREE_CODE (*node) != FUNCTION_DECL && TREE_CODE (*node) != VAR_DECL) |
005c1a13 | 1295 | { |
5c498b10 DD |
1296 | warning (OPT_Wattributes, "%qs attribute ignored", |
1297 | IDENTIFIER_POINTER (name)); | |
005c1a13 GK |
1298 | *no_add_attrs = true; |
1299 | } | |
1300 | else | |
1301 | declare_weak (*node); | |
1302 | ||
1303 | return NULL_TREE; | |
1304 | } | |
45cc4783 MS |
1305 | |
1306 | static void | |
1307 | no_dead_strip (FILE *file, const char *lab) | |
1308 | { | |
005c1a13 | 1309 | fprintf (file, ".no_dead_strip %s\n", lab); |
45cc4783 MS |
1310 | } |
1311 | ||
4746cf84 | 1312 | /* Emit a label for an FDE, making it global and/or weak if appropriate. |
eeab4d81 MS |
1313 | The third parameter is nonzero if this is for exception handling. |
1314 | The fourth parameter is nonzero if this is just a placeholder for an | |
4746cf84 | 1315 | FDE that we are omitting. */ |
eeab4d81 | 1316 | |
4746cf84 | 1317 | void |
eeab4d81 | 1318 | darwin_emit_unwind_label (FILE *file, tree decl, int for_eh, int empty) |
4746cf84 MA |
1319 | { |
1320 | tree id = DECL_ASSEMBLER_NAME (decl) | |
1321 | ? DECL_ASSEMBLER_NAME (decl) | |
1322 | : DECL_NAME (decl); | |
1323 | ||
3d20d4d8 | 1324 | const char *prefix = user_label_prefix; |
4746cf84 MA |
1325 | |
1326 | const char *base = IDENTIFIER_POINTER (id); | |
1327 | unsigned int base_len = IDENTIFIER_LENGTH (id); | |
1328 | ||
1329 | const char *suffix = ".eh"; | |
4746cf84 MA |
1330 | |
1331 | int need_quotes = name_needs_quotes (base); | |
1332 | int quotes_len = need_quotes ? 2 : 0; | |
eeab4d81 MS |
1333 | char *lab; |
1334 | ||
1335 | if (! for_eh) | |
1336 | suffix = ".eh1"; | |
4746cf84 | 1337 | |
3d20d4d8 MS |
1338 | lab = xmalloc (strlen (prefix) |
1339 | + base_len + strlen (suffix) + quotes_len + 1); | |
4746cf84 MA |
1340 | lab[0] = '\0'; |
1341 | ||
1342 | if (need_quotes) | |
1343 | strcat(lab, "\""); | |
1344 | strcat(lab, prefix); | |
1345 | strcat(lab, base); | |
1346 | strcat(lab, suffix); | |
1347 | if (need_quotes) | |
1348 | strcat(lab, "\""); | |
1349 | ||
1350 | if (TREE_PUBLIC (decl)) | |
f1a66265 | 1351 | fprintf (file, "\t%s %s\n", |
4746cf84 MA |
1352 | (DECL_VISIBILITY (decl) != VISIBILITY_HIDDEN |
1353 | ? ".globl" | |
1354 | : ".private_extern"), | |
1355 | lab); | |
1356 | ||
f1a66265 GK |
1357 | if (DECL_WEAK (decl)) |
1358 | fprintf (file, "\t.weak_definition %s\n", lab); | |
4746cf84 MA |
1359 | |
1360 | if (empty) | |
45cc4783 MS |
1361 | { |
1362 | fprintf (file, "%s = 0\n", lab); | |
1363 | ||
1364 | /* Mark the absolute .eh and .eh1 style labels as needed to | |
1365 | ensure that we don't dead code strip them and keep such | |
1366 | labels from another instantiation point until we can fix this | |
1367 | properly with group comdat support. */ | |
1368 | no_dead_strip (file, lab); | |
1369 | } | |
4746cf84 MA |
1370 | else |
1371 | fprintf (file, "%s:\n", lab); | |
1372 | ||
1373 | free (lab); | |
1374 | } | |
1375 | ||
1376 | /* Generate a PC-relative reference to a Mach-O non-lazy-symbol. */ | |
eeab4d81 | 1377 | |
4746cf84 MA |
1378 | void |
1379 | darwin_non_lazy_pcrel (FILE *file, rtx addr) | |
1380 | { | |
4746cf84 MA |
1381 | const char *nlp_name; |
1382 | ||
992d08b1 | 1383 | gcc_assert (GET_CODE (addr) == SYMBOL_REF); |
4746cf84 | 1384 | |
11abc112 | 1385 | nlp_name = machopic_indirection_name (addr, /*stub_p=*/false); |
4746cf84 MA |
1386 | fputs ("\t.long\t", file); |
1387 | ASM_OUTPUT_LABELREF (file, nlp_name); | |
1388 | fputs ("-.", file); | |
1389 | } | |
1390 | ||
6ce4806b MA |
1391 | /* Emit an assembler directive to set visibility for a symbol. The |
1392 | only supported visibilities are VISIBILITY_DEFAULT and | |
1393 | VISIBILITY_HIDDEN; the latter corresponds to Darwin's "private | |
1394 | extern". There is no MACH-O equivalent of ELF's | |
1395 | VISIBILITY_INTERNAL or VISIBILITY_PROTECTED. */ | |
1396 | ||
1397 | void | |
1398 | darwin_assemble_visibility (tree decl, int vis) | |
1399 | { | |
1400 | if (vis == VISIBILITY_DEFAULT) | |
1401 | ; | |
1402 | else if (vis == VISIBILITY_HIDDEN) | |
1403 | { | |
1404 | fputs ("\t.private_extern ", asm_out_file); | |
1405 | assemble_name (asm_out_file, | |
1406 | (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)))); | |
1407 | fputs ("\n", asm_out_file); | |
1408 | } | |
1409 | else | |
5c498b10 DD |
1410 | warning (OPT_Wattributes, "internal and protected visibility attributes " |
1411 | "not supported in this configuration; ignored"); | |
6ce4806b MA |
1412 | } |
1413 | ||
7606e68f SS |
1414 | /* Output a difference of two labels that will be an assembly time |
1415 | constant if the two labels are local. (.long lab1-lab2 will be | |
1416 | very different if lab1 is at the boundary between two sections; it | |
1417 | will be relocated according to the second section, not the first, | |
1418 | so one ends up with a difference between labels in different | |
1419 | sections, which is bad in the dwarf2 eh context for instance.) */ | |
1420 | ||
1421 | static int darwin_dwarf_label_counter; | |
1422 | ||
1423 | void | |
59d8fe27 | 1424 | darwin_asm_output_dwarf_delta (FILE *file, int size, |
9c808aad | 1425 | const char *lab1, const char *lab2) |
7606e68f | 1426 | { |
4746cf84 MA |
1427 | int islocaldiff = (lab1[0] == '*' && lab1[1] == 'L' |
1428 | && lab2[0] == '*' && lab2[1] == 'L'); | |
d4b56511 | 1429 | const char *directive = (size == 8 ? ".quad" : ".long"); |
7606e68f SS |
1430 | |
1431 | if (islocaldiff) | |
1432 | fprintf (file, "\t.set L$set$%d,", darwin_dwarf_label_counter); | |
1433 | else | |
59d8fe27 | 1434 | fprintf (file, "\t%s\t", directive); |
57829bc4 | 1435 | assemble_name_raw (file, lab1); |
7606e68f | 1436 | fprintf (file, "-"); |
57829bc4 | 1437 | assemble_name_raw (file, lab2); |
7606e68f | 1438 | if (islocaldiff) |
59d8fe27 | 1439 | fprintf (file, "\n\t%s L$set$%d", directive, darwin_dwarf_label_counter++); |
7606e68f SS |
1440 | } |
1441 | ||
a5fe455b | 1442 | void |
9c808aad | 1443 | darwin_file_end (void) |
a5fe455b ZW |
1444 | { |
1445 | machopic_finish (asm_out_file); | |
1446 | if (strcmp (lang_hooks.name, "GNU C++") == 0) | |
1447 | { | |
d6b5193b RS |
1448 | switch_to_section (constructor_section); |
1449 | switch_to_section (destructor_section); | |
a5fe455b ZW |
1450 | ASM_OUTPUT_ALIGN (asm_out_file, 1); |
1451 | } | |
92b9a671 | 1452 | fprintf (asm_out_file, "\t.subsections_via_symbols\n"); |
a5fe455b ZW |
1453 | } |
1454 | ||
31920d83 DJ |
1455 | /* Cross-module name binding. Darwin does not support overriding |
1456 | functions at dynamic-link time. */ | |
1457 | ||
1458 | bool | |
1459 | darwin_binds_local_p (tree decl) | |
1460 | { | |
1461 | return default_binds_local_p_1 (decl, 0); | |
1462 | } | |
1463 | ||
e2500fed | 1464 | #include "gt-darwin.h" |