]>
Commit | Line | Data |
---|---|---|
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 | |
56f42830 | 56 | translation unit with versions of those functions and methods |
699c914a | 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 | 68 | rs6000_emit_prologue for the code that handles the nop insertions. |
083cad55 | 69 | |
699c914a | 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 | |
56c779bc GK |
79 | /* Section names. */ |
80 | section * darwin_sections[NUM_DARWIN_SECTIONS]; | |
d6b5193b | 81 | |
4f8bdef9 EC |
82 | /* True if we're setting __attribute__ ((ms_struct)). */ |
83 | int darwin_ms_struct = false; | |
84 | ||
d6b5193b RS |
85 | /* A get_unnamed_section callback used to switch to an ObjC section. |
86 | DIRECTIVE is as for output_section_asm_op. */ | |
87 | ||
88 | static void | |
89 | output_objc_section_asm_op (const void *directive) | |
90 | { | |
56c779bc | 91 | static bool been_here = false; |
d6b5193b | 92 | |
56c779bc | 93 | if (! been_here) |
d6b5193b | 94 | { |
083cad55 | 95 | static const enum darwin_section_enum tomark[] = |
56c779bc GK |
96 | { |
97 | /* written, cold -> hot */ | |
98 | objc_cat_cls_meth_section, | |
99 | objc_cat_inst_meth_section, | |
100 | objc_string_object_section, | |
101 | objc_constant_string_object_section, | |
102 | objc_selector_refs_section, | |
103 | objc_selector_fixup_section, | |
104 | objc_cls_refs_section, | |
105 | objc_class_section, | |
106 | objc_meta_class_section, | |
107 | /* shared, hot -> cold */ | |
108 | objc_cls_meth_section, | |
109 | objc_inst_meth_section, | |
110 | objc_protocol_section, | |
111 | objc_class_names_section, | |
112 | objc_meth_var_types_section, | |
113 | objc_meth_var_names_section, | |
114 | objc_category_section, | |
115 | objc_class_vars_section, | |
116 | objc_instance_vars_section, | |
117 | objc_module_info_section, | |
118 | objc_symbols_section | |
119 | }; | |
120 | size_t i; | |
083cad55 | 121 | |
56c779bc GK |
122 | been_here = true; |
123 | for (i = 0; i < ARRAY_SIZE (tomark); i++) | |
124 | switch_to_section (darwin_sections[tomark[i]]); | |
d6b5193b RS |
125 | } |
126 | output_section_asm_op (directive); | |
127 | } | |
128 | ||
129 | /* Implement TARGET_ASM_INIT_SECTIONS. */ | |
130 | ||
131 | void | |
132 | darwin_init_sections (void) | |
133 | { | |
56c779bc GK |
134 | #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) \ |
135 | darwin_sections[NAME] = \ | |
136 | get_unnamed_section (FLAGS, (OBJC \ | |
137 | ? output_objc_section_asm_op \ | |
138 | : output_section_asm_op), \ | |
139 | "\t" DIRECTIVE); | |
140 | #include "config/darwin-sections.def" | |
d6b5193b RS |
141 | #undef DEF_SECTION |
142 | ||
56c779bc GK |
143 | readonly_data_section = darwin_sections[const_section]; |
144 | exception_section = darwin_sections[darwin_exception_section]; | |
145 | eh_frame_section = darwin_sections[darwin_eh_frame_section]; | |
d6b5193b | 146 | } |
699c914a | 147 | |
ee890fe2 | 148 | int |
9c808aad | 149 | name_needs_quotes (const char *name) |
ee890fe2 SS |
150 | { |
151 | int c; | |
152 | while ((c = *name++) != '\0') | |
6f94a68e | 153 | if (! ISIDNUM (c) && c != '.' && c != '$') |
ee890fe2 SS |
154 | return 1; |
155 | return 0; | |
156 | } | |
157 | ||
16515e5c | 158 | /* Return true if SYM_REF can be used without an indirection. */ |
11abc112 MM |
159 | static int |
160 | machopic_symbol_defined_p (rtx sym_ref) | |
ee890fe2 | 161 | { |
16515e5c AP |
162 | if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_DEFINED) |
163 | return true; | |
164 | ||
165 | /* If a symbol references local and is not an extern to this | |
166 | file, then the symbol might be able to declared as defined. */ | |
167 | if (SYMBOL_REF_LOCAL_P (sym_ref) && ! SYMBOL_REF_EXTERNAL_P (sym_ref)) | |
168 | { | |
169 | /* If the symbol references a variable and the variable is a | |
170 | common symbol, then this symbol is not defined. */ | |
171 | if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_VARIABLE) | |
172 | { | |
173 | tree decl = SYMBOL_REF_DECL (sym_ref); | |
174 | if (!decl) | |
175 | return true; | |
176 | if (DECL_COMMON (decl)) | |
177 | return false; | |
178 | } | |
179 | return true; | |
180 | } | |
181 | return false; | |
ee890fe2 SS |
182 | } |
183 | ||
11abc112 MM |
184 | /* This module assumes that (const (symbol_ref "foo")) is a legal pic |
185 | reference, which will not be changed. */ | |
9c808aad | 186 | |
ee890fe2 | 187 | enum machopic_addr_class |
11abc112 | 188 | machopic_classify_symbol (rtx sym_ref) |
ee890fe2 | 189 | { |
11abc112 MM |
190 | int flags; |
191 | bool function_p; | |
192 | ||
193 | flags = SYMBOL_REF_FLAGS (sym_ref); | |
194 | function_p = SYMBOL_REF_FUNCTION_P (sym_ref); | |
195 | if (machopic_symbol_defined_p (sym_ref)) | |
083cad55 | 196 | return (function_p |
11abc112 MM |
197 | ? MACHOPIC_DEFINED_FUNCTION : MACHOPIC_DEFINED_DATA); |
198 | else | |
083cad55 | 199 | return (function_p |
11abc112 | 200 | ? MACHOPIC_UNDEFINED_FUNCTION : MACHOPIC_UNDEFINED_DATA); |
ee890fe2 SS |
201 | } |
202 | ||
699c914a MS |
203 | #ifndef TARGET_FIX_AND_CONTINUE |
204 | #define TARGET_FIX_AND_CONTINUE 0 | |
205 | #endif | |
206 | ||
207 | /* Indicate when fix-and-continue style code generation is being used | |
208 | and when a reference to data should be indirected so that it can be | |
35fd3193 | 209 | rebound in a new translation unit to reference the original instance |
699c914a MS |
210 | of that data. Symbol names that are for code generation local to |
211 | the translation unit are bound to the new translation unit; | |
212 | currently this means symbols that begin with L or _OBJC_; | |
213 | otherwise, we indicate that an indirect reference should be made to | |
214 | permit the runtime to rebind new instances of the translation unit | |
215 | to the original instance of the data. */ | |
216 | ||
217 | static int | |
218 | indirect_data (rtx sym_ref) | |
219 | { | |
220 | int lprefix; | |
221 | const char *name; | |
222 | ||
223 | /* If we aren't generating fix-and-continue code, don't do anything special. */ | |
224 | if (TARGET_FIX_AND_CONTINUE == 0) | |
225 | return 0; | |
226 | ||
227 | /* Otherwise, all symbol except symbols that begin with L or _OBJC_ | |
228 | are indirected. Symbols that begin with L and _OBJC_ are always | |
229 | bound to the current translation unit as they are used for | |
230 | generated local data of the translation unit. */ | |
231 | ||
232 | name = XSTR (sym_ref, 0); | |
233 | ||
234 | lprefix = (((name[0] == '*' || name[0] == '&') | |
235 | && (name[1] == 'L' || (name[1] == '"' && name[2] == 'L'))) | |
ad6aaeb6 | 236 | || (strncmp (name, "_OBJC_", 6) == 0)); |
699c914a MS |
237 | |
238 | return ! lprefix; | |
239 | } | |
240 | ||
241 | ||
ee890fe2 | 242 | static int |
11abc112 | 243 | machopic_data_defined_p (rtx sym_ref) |
ee890fe2 | 244 | { |
699c914a MS |
245 | if (indirect_data (sym_ref)) |
246 | return 0; | |
247 | ||
11abc112 | 248 | switch (machopic_classify_symbol (sym_ref)) |
ee890fe2 SS |
249 | { |
250 | case MACHOPIC_DEFINED_DATA: | |
0e1ad529 | 251 | case MACHOPIC_DEFINED_FUNCTION: |
ee890fe2 SS |
252 | return 1; |
253 | default: | |
254 | return 0; | |
255 | } | |
256 | } | |
257 | ||
ee890fe2 | 258 | void |
11abc112 | 259 | machopic_define_symbol (rtx mem) |
ee890fe2 | 260 | { |
11abc112 | 261 | rtx sym_ref; |
083cad55 | 262 | |
992d08b1 | 263 | gcc_assert (GET_CODE (mem) == MEM); |
11abc112 MM |
264 | sym_ref = XEXP (mem, 0); |
265 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; | |
ee890fe2 SS |
266 | } |
267 | ||
6788f5ca | 268 | static GTY(()) char * function_base; |
ee890fe2 | 269 | |
92c1a778 | 270 | const char * |
9c808aad | 271 | machopic_function_base_name (void) |
ee890fe2 | 272 | { |
ab82a49f | 273 | /* if dynamic-no-pic is on, we should not get here */ |
992d08b1 | 274 | gcc_assert (!MACHO_DYNAMIC_NO_PIC_P); |
ee890fe2 | 275 | |
1622229c | 276 | if (function_base == NULL) |
9c808aad | 277 | function_base = |
1622229c AP |
278 | (char *) ggc_alloc_string ("<pic base>", sizeof ("<pic base>")); |
279 | ||
280 | current_function_uses_pic_offset_table = 1; | |
281 | ||
282 | return function_base; | |
283 | } | |
284 | ||
11abc112 MM |
285 | /* Return a SYMBOL_REF for the PIC function base. */ |
286 | ||
287 | rtx | |
288 | machopic_function_base_sym (void) | |
289 | { | |
290 | rtx sym_ref; | |
291 | ||
292 | sym_ref = gen_rtx_SYMBOL_REF (Pmode, machopic_function_base_name ()); | |
083cad55 | 293 | SYMBOL_REF_FLAGS (sym_ref) |
11abc112 MM |
294 | |= (MACHO_SYMBOL_FLAG_VARIABLE | MACHO_SYMBOL_FLAG_DEFINED); |
295 | return sym_ref; | |
296 | } | |
297 | ||
14a07c92 PB |
298 | /* Return either ORIG or (const:P (minus:P ORIG PIC_BASE)), depending |
299 | on whether pic_base is NULL or not. */ | |
300 | static inline rtx | |
301 | gen_pic_offset (rtx orig, rtx pic_base) | |
302 | { | |
303 | if (!pic_base) | |
304 | return orig; | |
305 | else | |
306 | return gen_rtx_CONST (Pmode, gen_rtx_MINUS (Pmode, orig, pic_base)); | |
307 | } | |
308 | ||
1622229c AP |
309 | static GTY(()) const char * function_base_func_name; |
310 | static GTY(()) int current_pic_label_num; | |
311 | ||
312 | void | |
313 | machopic_output_function_base_name (FILE *file) | |
314 | { | |
315 | const char *current_name; | |
316 | ||
ff482c8d | 317 | /* If dynamic-no-pic is on, we should not get here. */ |
992d08b1 | 318 | gcc_assert (!MACHO_DYNAMIC_NO_PIC_P); |
9c808aad | 319 | current_name = |
1622229c | 320 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl)); |
6788f5ca | 321 | if (function_base_func_name != current_name) |
ee890fe2 | 322 | { |
ee890fe2 | 323 | ++current_pic_label_num; |
6788f5ca | 324 | function_base_func_name = current_name; |
ee890fe2 | 325 | } |
1622229c | 326 | fprintf (file, "\"L%011d$pb\"", current_pic_label_num); |
ee890fe2 SS |
327 | } |
328 | ||
11abc112 MM |
329 | /* The suffix attached to non-lazy pointer symbols. */ |
330 | #define NON_LAZY_POINTER_SUFFIX "$non_lazy_ptr" | |
331 | /* The suffix attached to stub symbols. */ | |
332 | #define STUB_SUFFIX "$stub" | |
ee890fe2 | 333 | |
11abc112 | 334 | typedef struct machopic_indirection GTY (()) |
ee890fe2 | 335 | { |
11abc112 MM |
336 | /* The SYMBOL_REF for the entity referenced. */ |
337 | rtx symbol; | |
1adaa117 GK |
338 | /* The name of the stub or non-lazy pointer. */ |
339 | const char * ptr_name; | |
11abc112 MM |
340 | /* True iff this entry is for a stub (as opposed to a non-lazy |
341 | pointer). */ | |
342 | bool stub_p; | |
343 | /* True iff this stub or pointer pointer has been referenced. */ | |
344 | bool used; | |
345 | } machopic_indirection; | |
346 | ||
347 | /* A table mapping stub names and non-lazy pointer names to | |
348 | SYMBOL_REFs for the stubbed-to and pointed-to entities. */ | |
349 | ||
083cad55 | 350 | static GTY ((param_is (struct machopic_indirection))) htab_t |
11abc112 MM |
351 | machopic_indirections; |
352 | ||
353 | /* Return a hash value for a SLOT in the indirections hash table. */ | |
354 | ||
355 | static hashval_t | |
356 | machopic_indirection_hash (const void *slot) | |
357 | { | |
358 | const machopic_indirection *p = (const machopic_indirection *) slot; | |
1adaa117 | 359 | return htab_hash_string (p->ptr_name); |
11abc112 | 360 | } |
9c808aad | 361 | |
11abc112 MM |
362 | /* Returns true if the KEY is the same as that associated with |
363 | SLOT. */ | |
364 | ||
365 | static int | |
366 | machopic_indirection_eq (const void *slot, const void *key) | |
367 | { | |
1adaa117 | 368 | return strcmp (((const machopic_indirection *) slot)->ptr_name, key) == 0; |
11abc112 | 369 | } |
ee890fe2 | 370 | |
11abc112 MM |
371 | /* Return the name of the non-lazy pointer (if STUB_P is false) or |
372 | stub (if STUB_B is true) corresponding to the given name. */ | |
df56a27f | 373 | |
11abc112 MM |
374 | const char * |
375 | machopic_indirection_name (rtx sym_ref, bool stub_p) | |
376 | { | |
377 | char *buffer; | |
378 | const char *name = XSTR (sym_ref, 0); | |
1adaa117 | 379 | size_t namelen = strlen (name); |
11abc112 | 380 | machopic_indirection *p; |
1adaa117 | 381 | void ** slot; |
3d20d4d8 MS |
382 | bool saw_star = false; |
383 | bool needs_quotes; | |
384 | const char *suffix; | |
385 | const char *prefix = user_label_prefix; | |
386 | const char *quote = ""; | |
0a6a4494 AO |
387 | tree id; |
388 | ||
389 | id = maybe_get_identifier (name); | |
390 | if (id) | |
391 | { | |
392 | tree id_orig = id; | |
393 | ||
394 | while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
395 | id = TREE_CHAIN (id); | |
396 | if (id != id_orig) | |
397 | { | |
398 | name = IDENTIFIER_POINTER (id); | |
399 | namelen = strlen (name); | |
400 | } | |
401 | } | |
083cad55 | 402 | |
3d20d4d8 | 403 | if (name[0] == '*') |
df56a27f | 404 | { |
3d20d4d8 MS |
405 | saw_star = true; |
406 | prefix = ""; | |
407 | ++name; | |
408 | --namelen; | |
11abc112 | 409 | } |
3d20d4d8 MS |
410 | |
411 | needs_quotes = name_needs_quotes (name); | |
412 | if (needs_quotes) | |
11abc112 | 413 | { |
3d20d4d8 | 414 | quote = "\""; |
df56a27f SS |
415 | } |
416 | ||
3d20d4d8 MS |
417 | if (stub_p) |
418 | suffix = STUB_SUFFIX; | |
419 | else | |
420 | suffix = NON_LAZY_POINTER_SUFFIX; | |
421 | ||
422 | buffer = alloca (strlen ("&L") | |
423 | + strlen (prefix) | |
424 | + namelen | |
425 | + strlen (suffix) | |
426 | + 2 * strlen (quote) | |
427 | + 1 /* '\0' */); | |
428 | ||
429 | /* Construct the name of the non-lazy pointer or stub. */ | |
430 | sprintf (buffer, "&%sL%s%s%s%s", quote, prefix, name, suffix, quote); | |
431 | ||
1adaa117 | 432 | if (!machopic_indirections) |
083cad55 | 433 | machopic_indirections = htab_create_ggc (37, |
1adaa117 GK |
434 | machopic_indirection_hash, |
435 | machopic_indirection_eq, | |
436 | /*htab_del=*/NULL); | |
083cad55 | 437 | |
1adaa117 GK |
438 | slot = htab_find_slot_with_hash (machopic_indirections, buffer, |
439 | htab_hash_string (buffer), INSERT); | |
440 | if (*slot) | |
441 | { | |
442 | p = (machopic_indirection *) *slot; | |
443 | } | |
444 | else | |
11abc112 | 445 | { |
11abc112 MM |
446 | p = (machopic_indirection *) ggc_alloc (sizeof (machopic_indirection)); |
447 | p->symbol = sym_ref; | |
1adaa117 | 448 | p->ptr_name = xstrdup (buffer); |
11abc112 | 449 | p->stub_p = stub_p; |
1adaa117 GK |
450 | p->used = false; |
451 | *slot = p; | |
11abc112 | 452 | } |
083cad55 | 453 | |
1adaa117 | 454 | return p->ptr_name; |
ee890fe2 SS |
455 | } |
456 | ||
11abc112 | 457 | /* Return the name of the stub for the mcount function. */ |
ee890fe2 | 458 | |
11abc112 MM |
459 | const char* |
460 | machopic_mcount_stub_name (void) | |
ee890fe2 | 461 | { |
76f60aa5 AP |
462 | rtx symbol = gen_rtx_SYMBOL_REF (Pmode, "*mcount"); |
463 | return machopic_indirection_name (symbol, /*stub_p=*/true); | |
ee890fe2 SS |
464 | } |
465 | ||
11abc112 MM |
466 | /* If NAME is the name of a stub or a non-lazy pointer , mark the stub |
467 | or non-lazy pointer as used -- and mark the object to which the | |
468 | pointer/stub refers as used as well, since the pointer/stub will | |
469 | emit a reference to it. */ | |
470 | ||
ee890fe2 | 471 | void |
11abc112 | 472 | machopic_validate_stub_or_non_lazy_ptr (const char *name) |
ee890fe2 | 473 | { |
11abc112 | 474 | machopic_indirection *p; |
083cad55 EC |
475 | |
476 | p = ((machopic_indirection *) | |
1adaa117 GK |
477 | (htab_find_with_hash (machopic_indirections, name, |
478 | htab_hash_string (name)))); | |
479 | if (p && ! p->used) | |
11abc112 | 480 | { |
1adaa117 GK |
481 | const char *real_name; |
482 | tree id; | |
083cad55 | 483 | |
1adaa117 GK |
484 | p->used = true; |
485 | ||
ca472546 GK |
486 | /* Do what output_addr_const will do when we actually call it. */ |
487 | if (SYMBOL_REF_DECL (p->symbol)) | |
488 | mark_decl_referenced (SYMBOL_REF_DECL (p->symbol)); | |
489 | ||
490 | real_name = targetm.strip_name_encoding (XSTR (p->symbol, 0)); | |
083cad55 | 491 | |
1adaa117 GK |
492 | id = maybe_get_identifier (real_name); |
493 | if (id) | |
494 | mark_referenced (id); | |
11abc112 | 495 | } |
ee890fe2 SS |
496 | } |
497 | ||
498 | /* Transform ORIG, which may be any data source, to the corresponding | |
499 | source using indirections. */ | |
500 | ||
501 | rtx | |
9c808aad | 502 | machopic_indirect_data_reference (rtx orig, rtx reg) |
ee890fe2 SS |
503 | { |
504 | rtx ptr_ref = orig; | |
9c808aad | 505 | |
ee890fe2 SS |
506 | if (! MACHOPIC_INDIRECT) |
507 | return orig; | |
508 | ||
509 | if (GET_CODE (orig) == SYMBOL_REF) | |
510 | { | |
11abc112 | 511 | int defined = machopic_data_defined_p (orig); |
ab82a49f AP |
512 | |
513 | if (defined && MACHO_DYNAMIC_NO_PIC_P) | |
514 | { | |
515 | #if defined (TARGET_TOC) | |
4f8dbd34 AP |
516 | /* Create a new register for CSE opportunities. */ |
517 | rtx hi_reg = (no_new_pseudos ? reg : gen_reg_rtx (Pmode)); | |
518 | emit_insn (gen_macho_high (hi_reg, orig)); | |
519 | emit_insn (gen_macho_low (reg, hi_reg, orig)); | |
ab82a49f AP |
520 | #else |
521 | /* some other cpu -- writeme! */ | |
992d08b1 | 522 | gcc_unreachable (); |
ab82a49f AP |
523 | #endif |
524 | return reg; | |
525 | } | |
526 | else if (defined) | |
ee890fe2 | 527 | { |
7ae8cf75 | 528 | #if defined (TARGET_TOC) || defined (HAVE_lo_sum) |
11abc112 | 529 | rtx pic_base = machopic_function_base_sym (); |
14a07c92 | 530 | rtx offset = gen_pic_offset (orig, pic_base); |
7ae8cf75 | 531 | #endif |
ee890fe2 SS |
532 | |
533 | #if defined (TARGET_TOC) /* i.e., PowerPC */ | |
d9b46dfb | 534 | rtx hi_sum_reg = (no_new_pseudos ? reg : gen_reg_rtx (Pmode)); |
ee890fe2 | 535 | |
992d08b1 | 536 | gcc_assert (reg); |
ee890fe2 | 537 | |
6f94a68e GK |
538 | emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, |
539 | gen_rtx_PLUS (Pmode, pic_offset_table_rtx, | |
540 | gen_rtx_HIGH (Pmode, offset)))); | |
541 | emit_insn (gen_rtx_SET (Pmode, reg, | |
542 | gen_rtx_LO_SUM (Pmode, hi_sum_reg, offset))); | |
ee890fe2 SS |
543 | |
544 | orig = reg; | |
545 | #else | |
546 | #if defined (HAVE_lo_sum) | |
992d08b1 | 547 | gcc_assert (reg); |
ee890fe2 | 548 | |
6f94a68e GK |
549 | emit_insn (gen_rtx_SET (VOIDmode, reg, |
550 | gen_rtx_HIGH (Pmode, offset))); | |
551 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
552 | gen_rtx_LO_SUM (Pmode, reg, offset))); | |
553 | emit_insn (gen_rtx_USE (VOIDmode, pic_offset_table_rtx)); | |
ee890fe2 | 554 | |
6f94a68e | 555 | orig = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, reg); |
ee890fe2 SS |
556 | #endif |
557 | #endif | |
558 | return orig; | |
559 | } | |
560 | ||
828a4fe4 | 561 | ptr_ref = (gen_rtx_SYMBOL_REF |
083cad55 | 562 | (Pmode, |
11abc112 | 563 | machopic_indirection_name (orig, /*stub_p=*/false))); |
ee890fe2 | 564 | |
c185c797 | 565 | SYMBOL_REF_DATA (ptr_ref) = SYMBOL_REF_DATA (orig); |
c0d594f1 | 566 | |
542a8afa | 567 | ptr_ref = gen_const_mem (Pmode, ptr_ref); |
828a4fe4 | 568 | machopic_define_symbol (ptr_ref); |
ee890fe2 SS |
569 | |
570 | return ptr_ref; | |
571 | } | |
572 | else if (GET_CODE (orig) == CONST) | |
573 | { | |
574 | rtx base, result; | |
575 | ||
576 | /* legitimize both operands of the PLUS */ | |
577 | if (GET_CODE (XEXP (orig, 0)) == PLUS) | |
578 | { | |
579 | base = machopic_indirect_data_reference (XEXP (XEXP (orig, 0), 0), | |
580 | reg); | |
581 | orig = machopic_indirect_data_reference (XEXP (XEXP (orig, 0), 1), | |
582 | (base == reg ? 0 : reg)); | |
583 | } | |
9c808aad | 584 | else |
ee890fe2 SS |
585 | return orig; |
586 | ||
587 | if (MACHOPIC_PURE && GET_CODE (orig) == CONST_INT) | |
ed8908e7 | 588 | result = plus_constant (base, INTVAL (orig)); |
ee890fe2 | 589 | else |
6f94a68e | 590 | result = gen_rtx_PLUS (Pmode, base, orig); |
ee890fe2 | 591 | |
ee890fe2 SS |
592 | if (MACHOPIC_JUST_INDIRECT && GET_CODE (base) == MEM) |
593 | { | |
594 | if (reg) | |
595 | { | |
596 | emit_move_insn (reg, result); | |
597 | result = reg; | |
598 | } | |
599 | else | |
600 | { | |
601 | result = force_reg (GET_MODE (result), result); | |
602 | } | |
603 | } | |
604 | ||
605 | return result; | |
606 | ||
607 | } | |
608 | else if (GET_CODE (orig) == MEM) | |
609 | XEXP (ptr_ref, 0) = machopic_indirect_data_reference (XEXP (orig, 0), reg); | |
610 | /* When the target is i386, this code prevents crashes due to the | |
611 | compiler's ignorance on how to move the PIC base register to | |
612 | other registers. (The reload phase sometimes introduces such | |
613 | insns.) */ | |
614 | else if (GET_CODE (orig) == PLUS | |
615 | && GET_CODE (XEXP (orig, 0)) == REG | |
616 | && REGNO (XEXP (orig, 0)) == PIC_OFFSET_TABLE_REGNUM | |
617 | #ifdef I386 | |
618 | /* Prevent the same register from being erroneously used | |
619 | as both the base and index registers. */ | |
620 | && GET_CODE (XEXP (orig, 1)) == CONST | |
621 | #endif | |
622 | && reg) | |
623 | { | |
624 | emit_move_insn (reg, XEXP (orig, 0)); | |
625 | XEXP (ptr_ref, 0) = reg; | |
626 | } | |
627 | return ptr_ref; | |
628 | } | |
629 | ||
ee890fe2 SS |
630 | /* Transform TARGET (a MEM), which is a function call target, to the |
631 | corresponding symbol_stub if necessary. Return a new MEM. */ | |
632 | ||
633 | rtx | |
9c808aad | 634 | machopic_indirect_call_target (rtx target) |
ee890fe2 SS |
635 | { |
636 | if (GET_CODE (target) != MEM) | |
637 | return target; | |
638 | ||
083cad55 | 639 | if (MACHOPIC_INDIRECT |
11abc112 MM |
640 | && GET_CODE (XEXP (target, 0)) == SYMBOL_REF |
641 | && !(SYMBOL_REF_FLAGS (XEXP (target, 0)) | |
642 | & MACHO_SYMBOL_FLAG_DEFINED)) | |
9c808aad | 643 | { |
11abc112 | 644 | rtx sym_ref = XEXP (target, 0); |
083cad55 | 645 | const char *stub_name = machopic_indirection_name (sym_ref, |
11abc112 MM |
646 | /*stub_p=*/true); |
647 | enum machine_mode mode = GET_MODE (sym_ref); | |
083cad55 | 648 | |
11abc112 | 649 | XEXP (target, 0) = gen_rtx_SYMBOL_REF (mode, stub_name); |
c185c797 | 650 | SYMBOL_REF_DATA (XEXP (target, 0)) = SYMBOL_REF_DATA (sym_ref); |
389fdba0 | 651 | MEM_READONLY_P (target) = 1; |
542a8afa | 652 | MEM_NOTRAP_P (target) = 1; |
ee890fe2 SS |
653 | } |
654 | ||
655 | return target; | |
656 | } | |
657 | ||
658 | rtx | |
9c808aad | 659 | machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg) |
ee890fe2 SS |
660 | { |
661 | rtx pic_ref = orig; | |
662 | ||
ab82a49f | 663 | if (! MACHOPIC_INDIRECT) |
ee890fe2 SS |
664 | return orig; |
665 | ||
666 | /* First handle a simple SYMBOL_REF or LABEL_REF */ | |
667 | if (GET_CODE (orig) == LABEL_REF | |
668 | || (GET_CODE (orig) == SYMBOL_REF | |
669 | )) | |
670 | { | |
671 | /* addr(foo) = &func+(foo-func) */ | |
672 | rtx pic_base; | |
673 | ||
674 | orig = machopic_indirect_data_reference (orig, reg); | |
675 | ||
9c808aad | 676 | if (GET_CODE (orig) == PLUS |
ee890fe2 SS |
677 | && GET_CODE (XEXP (orig, 0)) == REG) |
678 | { | |
679 | if (reg == 0) | |
680 | return force_reg (mode, orig); | |
681 | ||
682 | emit_move_insn (reg, orig); | |
683 | return reg; | |
9c808aad | 684 | } |
ee890fe2 | 685 | |
14a07c92 | 686 | /* if dynamic-no-pic we don't have a pic base */ |
ab82a49f | 687 | if (MACHO_DYNAMIC_NO_PIC_P) |
14a07c92 | 688 | pic_base = NULL; |
ab82a49f | 689 | else |
11abc112 | 690 | pic_base = machopic_function_base_sym (); |
ee890fe2 SS |
691 | |
692 | if (GET_CODE (orig) == MEM) | |
693 | { | |
694 | if (reg == 0) | |
695 | { | |
992d08b1 NS |
696 | gcc_assert (!reload_in_progress); |
697 | reg = gen_reg_rtx (Pmode); | |
ee890fe2 | 698 | } |
9c808aad | 699 | |
ee890fe2 | 700 | #ifdef HAVE_lo_sum |
ab82a49f AP |
701 | if (MACHO_DYNAMIC_NO_PIC_P |
702 | && (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
703 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF)) | |
704 | { | |
705 | #if defined (TARGET_TOC) /* ppc */ | |
706 | rtx temp_reg = (no_new_pseudos) ? reg : gen_reg_rtx (Pmode); | |
707 | rtx asym = XEXP (orig, 0); | |
708 | rtx mem; | |
709 | ||
b8a55285 | 710 | emit_insn (gen_macho_high (temp_reg, asym)); |
542a8afa RH |
711 | mem = gen_const_mem (GET_MODE (orig), |
712 | gen_rtx_LO_SUM (Pmode, temp_reg, asym)); | |
6f94a68e | 713 | emit_insn (gen_rtx_SET (VOIDmode, reg, mem)); |
ab82a49f AP |
714 | #else |
715 | /* Some other CPU -- WriteMe! but right now there are no other platform that can use dynamic-no-pic */ | |
992d08b1 | 716 | gcc_unreachable (); |
ab82a49f AP |
717 | #endif |
718 | pic_ref = reg; | |
719 | } | |
720 | else | |
9c808aad | 721 | if (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF |
ee890fe2 SS |
722 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) |
723 | { | |
14a07c92 | 724 | rtx offset = gen_pic_offset (XEXP (orig, 0), pic_base); |
ee890fe2 SS |
725 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
726 | /* Generating a new reg may expose opportunities for | |
727 | common subexpression elimination. */ | |
49bd1d27 | 728 | rtx hi_sum_reg = no_new_pseudos ? reg : gen_reg_rtx (Pmode); |
6f94a68e GK |
729 | rtx mem; |
730 | rtx insn; | |
731 | rtx sum; | |
083cad55 | 732 | |
6f94a68e GK |
733 | sum = gen_rtx_HIGH (Pmode, offset); |
734 | if (! MACHO_DYNAMIC_NO_PIC_P) | |
735 | sum = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, sum); | |
ee890fe2 | 736 | |
6f94a68e GK |
737 | emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, sum)); |
738 | ||
542a8afa | 739 | mem = gen_const_mem (GET_MODE (orig), |
083cad55 | 740 | gen_rtx_LO_SUM (Pmode, |
542a8afa | 741 | hi_sum_reg, offset)); |
6f94a68e | 742 | insn = emit_insn (gen_rtx_SET (VOIDmode, reg, mem)); |
083cad55 | 743 | REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_EQUAL, pic_ref, |
6f94a68e GK |
744 | REG_NOTES (insn)); |
745 | ||
746 | pic_ref = reg; | |
ee890fe2 | 747 | #else |
6f94a68e | 748 | emit_insn (gen_rtx_USE (VOIDmode, |
083cad55 | 749 | gen_rtx_REG (Pmode, |
6f94a68e GK |
750 | PIC_OFFSET_TABLE_REGNUM))); |
751 | ||
752 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
753 | gen_rtx_HIGH (Pmode, | |
083cad55 | 754 | gen_rtx_CONST (Pmode, |
6f94a68e GK |
755 | offset)))); |
756 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
757 | gen_rtx_LO_SUM (Pmode, reg, | |
758 | gen_rtx_CONST (Pmode, offset)))); | |
759 | pic_ref = gen_rtx_PLUS (Pmode, | |
760 | pic_offset_table_rtx, reg); | |
ee890fe2 SS |
761 | #endif |
762 | } | |
763 | else | |
764 | #endif /* HAVE_lo_sum */ | |
765 | { | |
766 | rtx pic = pic_offset_table_rtx; | |
767 | if (GET_CODE (pic) != REG) | |
768 | { | |
769 | emit_move_insn (reg, pic); | |
770 | pic = reg; | |
771 | } | |
772 | #if 0 | |
6f94a68e | 773 | emit_insn (gen_rtx_USE (VOIDmode, |
083cad55 | 774 | gen_rtx_REG (Pmode, |
6f94a68e | 775 | PIC_OFFSET_TABLE_REGNUM))); |
ee890fe2 SS |
776 | #endif |
777 | ||
7d072037 SH |
778 | if (reload_in_progress) |
779 | regs_ever_live[REGNO (pic)] = 1; | |
14a07c92 PB |
780 | pic_ref = gen_rtx_PLUS (Pmode, pic, |
781 | gen_pic_offset (XEXP (orig, 0), | |
782 | pic_base)); | |
ee890fe2 | 783 | } |
9c808aad | 784 | |
ee890fe2 | 785 | #if !defined (TARGET_TOC) |
ee890fe2 | 786 | emit_move_insn (reg, pic_ref); |
542a8afa | 787 | pic_ref = gen_const_mem (GET_MODE (orig), reg); |
f9b0ac3b | 788 | #endif |
ee890fe2 SS |
789 | } |
790 | else | |
791 | { | |
792 | ||
793 | #ifdef HAVE_lo_sum | |
9c808aad | 794 | if (GET_CODE (orig) == SYMBOL_REF |
ee890fe2 SS |
795 | || GET_CODE (orig) == LABEL_REF) |
796 | { | |
14a07c92 | 797 | rtx offset = gen_pic_offset (orig, pic_base); |
ee890fe2 SS |
798 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
799 | rtx hi_sum_reg; | |
800 | ||
801 | if (reg == 0) | |
802 | { | |
992d08b1 NS |
803 | gcc_assert (!reload_in_progress); |
804 | reg = gen_reg_rtx (Pmode); | |
ee890fe2 | 805 | } |
9c808aad | 806 | |
ee890fe2 SS |
807 | hi_sum_reg = reg; |
808 | ||
6f94a68e GK |
809 | emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, |
810 | (MACHO_DYNAMIC_NO_PIC_P) | |
811 | ? gen_rtx_HIGH (Pmode, offset) | |
812 | : gen_rtx_PLUS (Pmode, | |
813 | pic_offset_table_rtx, | |
083cad55 | 814 | gen_rtx_HIGH (Pmode, |
6f94a68e GK |
815 | offset)))); |
816 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
817 | gen_rtx_LO_SUM (Pmode, | |
818 | hi_sum_reg, offset))); | |
ee890fe2 SS |
819 | pic_ref = reg; |
820 | #else | |
6f94a68e GK |
821 | emit_insn (gen_rtx_SET (VOIDmode, reg, |
822 | gen_rtx_HIGH (Pmode, offset))); | |
823 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
824 | gen_rtx_LO_SUM (Pmode, reg, offset))); | |
825 | pic_ref = gen_rtx_PLUS (Pmode, | |
826 | pic_offset_table_rtx, reg); | |
ee890fe2 SS |
827 | #endif |
828 | } | |
829 | else | |
830 | #endif /* HAVE_lo_sum */ | |
831 | { | |
83cf88cb AP |
832 | if (REG_P (orig) |
833 | || GET_CODE (orig) == SUBREG) | |
ee890fe2 SS |
834 | { |
835 | return orig; | |
836 | } | |
837 | else | |
838 | { | |
839 | rtx pic = pic_offset_table_rtx; | |
840 | if (GET_CODE (pic) != REG) | |
841 | { | |
842 | emit_move_insn (reg, pic); | |
843 | pic = reg; | |
844 | } | |
845 | #if 0 | |
6f94a68e GK |
846 | emit_insn (gen_rtx_USE (VOIDmode, |
847 | pic_offset_table_rtx)); | |
ee890fe2 | 848 | #endif |
7d072037 SH |
849 | if (reload_in_progress) |
850 | regs_ever_live[REGNO (pic)] = 1; | |
6f94a68e GK |
851 | pic_ref = gen_rtx_PLUS (Pmode, |
852 | pic, | |
14a07c92 | 853 | gen_pic_offset (orig, pic_base)); |
ee890fe2 SS |
854 | } |
855 | } | |
856 | } | |
857 | ||
ee890fe2 SS |
858 | if (GET_CODE (pic_ref) != REG) |
859 | { | |
860 | if (reg != 0) | |
861 | { | |
862 | emit_move_insn (reg, pic_ref); | |
863 | return reg; | |
864 | } | |
865 | else | |
866 | { | |
867 | return force_reg (mode, pic_ref); | |
868 | } | |
869 | } | |
870 | else | |
871 | { | |
872 | return pic_ref; | |
873 | } | |
874 | } | |
875 | ||
876 | else if (GET_CODE (orig) == SYMBOL_REF) | |
877 | return orig; | |
878 | ||
879 | else if (GET_CODE (orig) == PLUS | |
880 | && (GET_CODE (XEXP (orig, 0)) == MEM | |
881 | || GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
882 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) | |
883 | && XEXP (orig, 0) != pic_offset_table_rtx | |
884 | && GET_CODE (XEXP (orig, 1)) != REG) | |
9c808aad | 885 | |
ee890fe2 SS |
886 | { |
887 | rtx base; | |
888 | int is_complex = (GET_CODE (XEXP (orig, 0)) == MEM); | |
889 | ||
890 | base = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
891 | orig = machopic_legitimize_pic_address (XEXP (orig, 1), | |
892 | Pmode, (base == reg ? 0 : reg)); | |
893 | if (GET_CODE (orig) == CONST_INT) | |
894 | { | |
ed8908e7 | 895 | pic_ref = plus_constant (base, INTVAL (orig)); |
ee890fe2 SS |
896 | is_complex = 1; |
897 | } | |
898 | else | |
6f94a68e | 899 | pic_ref = gen_rtx_PLUS (Pmode, base, orig); |
ee890fe2 | 900 | |
ee890fe2 SS |
901 | if (reg && is_complex) |
902 | { | |
903 | emit_move_insn (reg, pic_ref); | |
904 | pic_ref = reg; | |
905 | } | |
906 | /* Likewise, should we set special REG_NOTEs here? */ | |
907 | } | |
908 | ||
909 | else if (GET_CODE (orig) == CONST) | |
910 | { | |
911 | return machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
912 | } | |
913 | ||
914 | else if (GET_CODE (orig) == MEM | |
915 | && GET_CODE (XEXP (orig, 0)) == SYMBOL_REF) | |
916 | { | |
917 | rtx addr = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
389fdba0 | 918 | addr = replace_equiv_address (orig, addr); |
ee890fe2 SS |
919 | emit_move_insn (reg, addr); |
920 | pic_ref = reg; | |
921 | } | |
922 | ||
923 | return pic_ref; | |
924 | } | |
925 | ||
11abc112 MM |
926 | /* Output the stub or non-lazy pointer in *SLOT, if it has been used. |
927 | DATA is the FILE* for assembly output. Called from | |
928 | htab_traverse. */ | |
ee890fe2 | 929 | |
11abc112 MM |
930 | static int |
931 | machopic_output_indirection (void **slot, void *data) | |
ee890fe2 | 932 | { |
11abc112 MM |
933 | machopic_indirection *p = *((machopic_indirection **) slot); |
934 | FILE *asm_out_file = (FILE *) data; | |
935 | rtx symbol; | |
936 | const char *sym_name; | |
937 | const char *ptr_name; | |
083cad55 | 938 | |
11abc112 MM |
939 | if (!p->used) |
940 | return 1; | |
ee890fe2 | 941 | |
11abc112 MM |
942 | symbol = p->symbol; |
943 | sym_name = XSTR (symbol, 0); | |
1adaa117 | 944 | ptr_name = p->ptr_name; |
083cad55 | 945 | |
11abc112 | 946 | if (p->stub_p) |
ee890fe2 | 947 | { |
ee890fe2 SS |
948 | char *sym; |
949 | char *stub; | |
0a6a4494 AO |
950 | tree id; |
951 | ||
952 | id = maybe_get_identifier (sym_name); | |
953 | if (id) | |
954 | { | |
955 | tree id_orig = id; | |
956 | ||
957 | while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
958 | id = TREE_CHAIN (id); | |
959 | if (id != id_orig) | |
960 | sym_name = IDENTIFIER_POINTER (id); | |
961 | } | |
ee890fe2 | 962 | |
ee890fe2 SS |
963 | sym = alloca (strlen (sym_name) + 2); |
964 | if (sym_name[0] == '*' || sym_name[0] == '&') | |
965 | strcpy (sym, sym_name + 1); | |
966 | else if (sym_name[0] == '-' || sym_name[0] == '+') | |
9c808aad | 967 | strcpy (sym, sym_name); |
ee890fe2 | 968 | else |
789a4ea3 | 969 | sprintf (sym, "%s%s", user_label_prefix, sym_name); |
ee890fe2 | 970 | |
11abc112 MM |
971 | stub = alloca (strlen (ptr_name) + 2); |
972 | if (ptr_name[0] == '*' || ptr_name[0] == '&') | |
973 | strcpy (stub, ptr_name + 1); | |
ee890fe2 | 974 | else |
11abc112 | 975 | sprintf (stub, "%s%s", user_label_prefix, ptr_name); |
ee890fe2 | 976 | |
ca472546 | 977 | machopic_output_stub (asm_out_file, sym, stub); |
ee890fe2 | 978 | } |
699c914a | 979 | else if (! indirect_data (symbol) |
156a126c MS |
980 | && (machopic_symbol_defined_p (symbol) |
981 | || SYMBOL_REF_LOCAL_P (symbol))) | |
ee890fe2 | 982 | { |
d6b5193b | 983 | switch_to_section (data_section); |
11abc112 MM |
984 | assemble_align (GET_MODE_ALIGNMENT (Pmode)); |
985 | assemble_label (ptr_name); | |
986 | assemble_integer (gen_rtx_SYMBOL_REF (Pmode, sym_name), | |
987 | GET_MODE_SIZE (Pmode), | |
988 | GET_MODE_ALIGNMENT (Pmode), 1); | |
ee890fe2 | 989 | } |
11abc112 MM |
990 | else |
991 | { | |
699c914a MS |
992 | rtx init = const0_rtx; |
993 | ||
56c779bc | 994 | switch_to_section (darwin_sections[machopic_nl_symbol_ptr_section]); |
11abc112 MM |
995 | assemble_name (asm_out_file, ptr_name); |
996 | fprintf (asm_out_file, ":\n"); | |
083cad55 | 997 | |
11abc112 MM |
998 | fprintf (asm_out_file, "\t.indirect_symbol "); |
999 | assemble_name (asm_out_file, sym_name); | |
1000 | fprintf (asm_out_file, "\n"); | |
083cad55 | 1001 | |
699c914a MS |
1002 | /* Variables that are marked with MACHO_SYMBOL_STATIC need to |
1003 | have their symbol name instead of 0 in the second entry of | |
1004 | the non-lazy symbol pointer data structure when they are | |
1005 | defined. This allows the runtime to rebind newer instances | |
1006 | of the translation unit with the original instance of the | |
d6ff8575 | 1007 | symbol. */ |
699c914a MS |
1008 | |
1009 | if ((SYMBOL_REF_FLAGS (symbol) & MACHO_SYMBOL_STATIC) | |
1010 | && machopic_symbol_defined_p (symbol)) | |
1011 | init = gen_rtx_SYMBOL_REF (Pmode, sym_name); | |
1012 | ||
1013 | assemble_integer (init, GET_MODE_SIZE (Pmode), | |
11abc112 MM |
1014 | GET_MODE_ALIGNMENT (Pmode), 1); |
1015 | } | |
083cad55 | 1016 | |
11abc112 MM |
1017 | return 1; |
1018 | } | |
1019 | ||
1020 | void | |
1021 | machopic_finish (FILE *asm_out_file) | |
1022 | { | |
1023 | if (machopic_indirections) | |
699c914a | 1024 | htab_traverse_noresize (machopic_indirections, |
11abc112 MM |
1025 | machopic_output_indirection, |
1026 | asm_out_file); | |
ee890fe2 SS |
1027 | } |
1028 | ||
9c808aad AJ |
1029 | int |
1030 | machopic_operand_p (rtx op) | |
ee890fe2 SS |
1031 | { |
1032 | if (MACHOPIC_JUST_INDIRECT) | |
1033 | { | |
1034 | while (GET_CODE (op) == CONST) | |
1035 | op = XEXP (op, 0); | |
1036 | ||
1037 | if (GET_CODE (op) == SYMBOL_REF) | |
11abc112 | 1038 | return machopic_symbol_defined_p (op); |
ee890fe2 SS |
1039 | else |
1040 | return 0; | |
1041 | } | |
1042 | ||
1043 | while (GET_CODE (op) == CONST) | |
1044 | op = XEXP (op, 0); | |
1045 | ||
1046 | if (GET_CODE (op) == MINUS | |
1047 | && GET_CODE (XEXP (op, 0)) == SYMBOL_REF | |
1048 | && GET_CODE (XEXP (op, 1)) == SYMBOL_REF | |
11abc112 MM |
1049 | && machopic_symbol_defined_p (XEXP (op, 0)) |
1050 | && machopic_symbol_defined_p (XEXP (op, 1))) | |
ee890fe2 SS |
1051 | return 1; |
1052 | ||
ee890fe2 SS |
1053 | return 0; |
1054 | } | |
df56a27f SS |
1055 | |
1056 | /* This function records whether a given name corresponds to a defined | |
1057 | or undefined function or variable, for machopic_classify_ident to | |
1058 | use later. */ | |
1059 | ||
1060 | void | |
9c808aad | 1061 | darwin_encode_section_info (tree decl, rtx rtl, int first ATTRIBUTE_UNUSED) |
df56a27f | 1062 | { |
353e51f8 | 1063 | rtx sym_ref; |
df56a27f | 1064 | |
e1a4211d SS |
1065 | /* Do the standard encoding things first. */ |
1066 | default_encode_section_info (decl, rtl, first); | |
1067 | ||
11abc112 MM |
1068 | if (TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL) |
1069 | return; | |
e1a4211d | 1070 | |
11abc112 MM |
1071 | sym_ref = XEXP (rtl, 0); |
1072 | if (TREE_CODE (decl) == VAR_DECL) | |
1073 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_VARIABLE; | |
1074 | ||
1075 | if (!DECL_EXTERNAL (decl) | |
f1a66265 | 1076 | && (!TREE_PUBLIC (decl) || !DECL_WEAK (decl)) |
a9b0b825 | 1077 | && ! lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)) |
df56a27f SS |
1078 | && ((TREE_STATIC (decl) |
1079 | && (!DECL_COMMON (decl) || !TREE_PUBLIC (decl))) | |
bfbdca0b | 1080 | || (!DECL_COMMON (decl) && DECL_INITIAL (decl) |
abe72dd8 | 1081 | && DECL_INITIAL (decl) != error_mark_node))) |
11abc112 | 1082 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; |
699c914a | 1083 | |
d6ff8575 | 1084 | if (! TREE_PUBLIC (decl)) |
699c914a | 1085 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_STATIC; |
4e08ba6c | 1086 | } |
2cc07db4 | 1087 | |
8e3e233b DP |
1088 | void |
1089 | darwin_mark_decl_preserved (const char *name) | |
1090 | { | |
1091 | fprintf (asm_out_file, ".no_dead_strip "); | |
1092 | assemble_name (asm_out_file, name); | |
1093 | fputc ('\n', asm_out_file); | |
1094 | } | |
1095 | ||
d6b5193b | 1096 | section * |
9c808aad AJ |
1097 | machopic_select_section (tree exp, int reloc, |
1098 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
ae46c4e0 | 1099 | { |
d6b5193b | 1100 | section *base_section; |
0f9bc2d6 GK |
1101 | bool weak_p = (DECL_P (exp) && DECL_WEAK (exp) |
1102 | && (lookup_attribute ("weak", DECL_ATTRIBUTES (exp)) | |
1103 | || ! lookup_attribute ("weak_import", | |
1104 | DECL_ATTRIBUTES (exp)))); | |
d6b5193b | 1105 | |
f1a66265 | 1106 | if (TREE_CODE (exp) == FUNCTION_DECL) |
d6b5193b | 1107 | { |
c543ca49 | 1108 | if (reloc == 1) |
d6b5193b | 1109 | base_section = (weak_p |
56c779bc | 1110 | ? darwin_sections[text_unlikely_coal_section] |
d6b5193b RS |
1111 | : unlikely_text_section ()); |
1112 | else | |
56c779bc | 1113 | base_section = weak_p ? darwin_sections[text_coal_section] : text_section; |
d6b5193b | 1114 | } |
f1a66265 | 1115 | else if (decl_readonly_section_1 (exp, reloc, MACHOPIC_INDIRECT)) |
56c779bc | 1116 | base_section = weak_p ? darwin_sections[const_coal_section] : darwin_sections[const_section]; |
3d7964d5 | 1117 | else if (TREE_READONLY (exp) || TREE_CONSTANT (exp)) |
56c779bc | 1118 | base_section = weak_p ? darwin_sections[const_data_coal_section] : darwin_sections[const_data_section]; |
3d7964d5 | 1119 | else |
56c779bc | 1120 | base_section = weak_p ? darwin_sections[data_coal_section] : data_section; |
9c808aad | 1121 | |
3d7964d5 | 1122 | if (TREE_CODE (exp) == STRING_CST |
9c808aad | 1123 | && ((size_t) TREE_STRING_LENGTH (exp) |
3521b33c | 1124 | == strlen (TREE_STRING_POINTER (exp)) + 1)) |
56c779bc | 1125 | return darwin_sections[cstring_section]; |
3d7964d5 GK |
1126 | else if ((TREE_CODE (exp) == INTEGER_CST || TREE_CODE (exp) == REAL_CST) |
1127 | && flag_merge_constants) | |
ae46c4e0 | 1128 | { |
e1e04267 | 1129 | tree size = TYPE_SIZE_UNIT (TREE_TYPE (exp)); |
ae46c4e0 RH |
1130 | |
1131 | if (TREE_CODE (size) == INTEGER_CST && | |
1132 | TREE_INT_CST_LOW (size) == 4 && | |
1133 | TREE_INT_CST_HIGH (size) == 0) | |
56c779bc | 1134 | return darwin_sections[literal4_section]; |
ae46c4e0 RH |
1135 | else if (TREE_CODE (size) == INTEGER_CST && |
1136 | TREE_INT_CST_LOW (size) == 8 && | |
1137 | TREE_INT_CST_HIGH (size) == 0) | |
56c779bc | 1138 | return darwin_sections[literal8_section]; |
f7288899 EC |
1139 | else if (TARGET_64BIT |
1140 | && TREE_CODE (size) == INTEGER_CST | |
1141 | && TREE_INT_CST_LOW (size) == 16 | |
1142 | && TREE_INT_CST_HIGH (size) == 0) | |
1143 | return darwin_sections[literal16_section]; | |
ae46c4e0 | 1144 | else |
d6b5193b | 1145 | return base_section; |
ae46c4e0 RH |
1146 | } |
1147 | else if (TREE_CODE (exp) == CONSTRUCTOR | |
1148 | && TREE_TYPE (exp) | |
1149 | && TREE_CODE (TREE_TYPE (exp)) == RECORD_TYPE | |
1150 | && TYPE_NAME (TREE_TYPE (exp))) | |
1151 | { | |
1152 | tree name = TYPE_NAME (TREE_TYPE (exp)); | |
1153 | if (TREE_CODE (name) == TYPE_DECL) | |
1154 | name = DECL_NAME (name); | |
c64de75f ZL |
1155 | |
1156 | if (!strcmp (IDENTIFIER_POINTER (name), "__builtin_ObjCString")) | |
1157 | { | |
1158 | if (flag_next_runtime) | |
56c779bc | 1159 | return darwin_sections[objc_constant_string_object_section]; |
c64de75f | 1160 | else |
56c779bc | 1161 | return darwin_sections[objc_string_object_section]; |
c64de75f | 1162 | } |
ae46c4e0 | 1163 | else |
d6b5193b | 1164 | return base_section; |
ae46c4e0 RH |
1165 | } |
1166 | else if (TREE_CODE (exp) == VAR_DECL && | |
1167 | DECL_NAME (exp) && | |
1168 | TREE_CODE (DECL_NAME (exp)) == IDENTIFIER_NODE && | |
1169 | IDENTIFIER_POINTER (DECL_NAME (exp)) && | |
1170 | !strncmp (IDENTIFIER_POINTER (DECL_NAME (exp)), "_OBJC_", 6)) | |
1171 | { | |
1172 | const char *name = IDENTIFIER_POINTER (DECL_NAME (exp)); | |
1173 | ||
1174 | if (!strncmp (name, "_OBJC_CLASS_METHODS_", 20)) | |
56c779bc | 1175 | return darwin_sections[objc_cls_meth_section]; |
ae46c4e0 | 1176 | else if (!strncmp (name, "_OBJC_INSTANCE_METHODS_", 23)) |
56c779bc | 1177 | return darwin_sections[objc_inst_meth_section]; |
ae46c4e0 | 1178 | else if (!strncmp (name, "_OBJC_CATEGORY_CLASS_METHODS_", 20)) |
56c779bc | 1179 | return darwin_sections[objc_cat_cls_meth_section]; |
ae46c4e0 | 1180 | else if (!strncmp (name, "_OBJC_CATEGORY_INSTANCE_METHODS_", 23)) |
56c779bc | 1181 | return darwin_sections[objc_cat_inst_meth_section]; |
ae46c4e0 | 1182 | else if (!strncmp (name, "_OBJC_CLASS_VARIABLES_", 22)) |
56c779bc | 1183 | return darwin_sections[objc_class_vars_section]; |
ae46c4e0 | 1184 | else if (!strncmp (name, "_OBJC_INSTANCE_VARIABLES_", 25)) |
56c779bc | 1185 | return darwin_sections[objc_instance_vars_section]; |
ae46c4e0 | 1186 | else if (!strncmp (name, "_OBJC_CLASS_PROTOCOLS_", 22)) |
56c779bc | 1187 | return darwin_sections[objc_cat_cls_meth_section]; |
ae46c4e0 | 1188 | else if (!strncmp (name, "_OBJC_CLASS_NAME_", 17)) |
56c779bc | 1189 | return darwin_sections[objc_class_names_section]; |
ae46c4e0 | 1190 | else if (!strncmp (name, "_OBJC_METH_VAR_NAME_", 20)) |
56c779bc | 1191 | return darwin_sections[objc_meth_var_names_section]; |
ae46c4e0 | 1192 | else if (!strncmp (name, "_OBJC_METH_VAR_TYPE_", 20)) |
56c779bc | 1193 | return darwin_sections[objc_meth_var_types_section]; |
ae46c4e0 | 1194 | else if (!strncmp (name, "_OBJC_CLASS_REFERENCES", 22)) |
56c779bc | 1195 | return darwin_sections[objc_cls_refs_section]; |
ae46c4e0 | 1196 | else if (!strncmp (name, "_OBJC_CLASS_", 12)) |
56c779bc | 1197 | return darwin_sections[objc_class_section]; |
ae46c4e0 | 1198 | else if (!strncmp (name, "_OBJC_METACLASS_", 16)) |
56c779bc | 1199 | return darwin_sections[objc_meta_class_section]; |
ae46c4e0 | 1200 | else if (!strncmp (name, "_OBJC_CATEGORY_", 15)) |
56c779bc | 1201 | return darwin_sections[objc_category_section]; |
ae46c4e0 | 1202 | else if (!strncmp (name, "_OBJC_SELECTOR_REFERENCES", 25)) |
56c779bc | 1203 | return darwin_sections[objc_selector_refs_section]; |
ae46c4e0 | 1204 | else if (!strncmp (name, "_OBJC_SELECTOR_FIXUP", 20)) |
56c779bc | 1205 | return darwin_sections[objc_selector_fixup_section]; |
ae46c4e0 | 1206 | else if (!strncmp (name, "_OBJC_SYMBOLS", 13)) |
56c779bc | 1207 | return darwin_sections[objc_symbols_section]; |
ae46c4e0 | 1208 | else if (!strncmp (name, "_OBJC_MODULES", 13)) |
56c779bc | 1209 | return darwin_sections[objc_module_info_section]; |
264fa2db | 1210 | else if (!strncmp (name, "_OBJC_IMAGE_INFO", 16)) |
56c779bc | 1211 | return darwin_sections[objc_image_info_section]; |
ae46c4e0 | 1212 | else if (!strncmp (name, "_OBJC_PROTOCOL_INSTANCE_METHODS_", 32)) |
56c779bc | 1213 | return darwin_sections[objc_cat_inst_meth_section]; |
ae46c4e0 | 1214 | else if (!strncmp (name, "_OBJC_PROTOCOL_CLASS_METHODS_", 29)) |
56c779bc | 1215 | return darwin_sections[objc_cat_cls_meth_section]; |
ae46c4e0 | 1216 | else if (!strncmp (name, "_OBJC_PROTOCOL_REFS_", 20)) |
56c779bc | 1217 | return darwin_sections[objc_cat_cls_meth_section]; |
ae46c4e0 | 1218 | else if (!strncmp (name, "_OBJC_PROTOCOL_", 15)) |
56c779bc | 1219 | return darwin_sections[objc_protocol_section]; |
ae46c4e0 | 1220 | else |
d6b5193b | 1221 | return base_section; |
ae46c4e0 RH |
1222 | } |
1223 | else | |
d6b5193b | 1224 | return base_section; |
ae46c4e0 RH |
1225 | } |
1226 | ||
b64a1b53 | 1227 | /* This can be called with address expressions as "rtx". |
991b6592 | 1228 | They must go in "const". */ |
b64a1b53 | 1229 | |
d6b5193b | 1230 | section * |
9c808aad AJ |
1231 | machopic_select_rtx_section (enum machine_mode mode, rtx x, |
1232 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
b64a1b53 | 1233 | { |
b79d4265 SS |
1234 | if (GET_MODE_SIZE (mode) == 8 |
1235 | && (GET_CODE (x) == CONST_INT | |
1236 | || GET_CODE (x) == CONST_DOUBLE)) | |
56c779bc | 1237 | return darwin_sections[literal8_section]; |
b64a1b53 RH |
1238 | else if (GET_MODE_SIZE (mode) == 4 |
1239 | && (GET_CODE (x) == CONST_INT | |
1240 | || GET_CODE (x) == CONST_DOUBLE)) | |
56c779bc | 1241 | return darwin_sections[literal4_section]; |
1be1e2dd EC |
1242 | else if (TARGET_64BIT |
1243 | && GET_MODE_SIZE (mode) == 16 | |
f7288899 | 1244 | && (GET_CODE (x) == CONST_INT |
ca6f2eef EC |
1245 | || GET_CODE (x) == CONST_DOUBLE |
1246 | || GET_CODE (x) == CONST_VECTOR)) | |
f7288899 | 1247 | return darwin_sections[literal16_section]; |
86b0a4f3 | 1248 | else if (MACHOPIC_INDIRECT |
2e53734e GK |
1249 | && (GET_CODE (x) == SYMBOL_REF |
1250 | || GET_CODE (x) == CONST | |
1251 | || GET_CODE (x) == LABEL_REF)) | |
56c779bc | 1252 | return darwin_sections[const_data_section]; |
b64a1b53 | 1253 | else |
56c779bc | 1254 | return darwin_sections[const_section]; |
b64a1b53 RH |
1255 | } |
1256 | ||
2cc07db4 | 1257 | void |
9c808aad | 1258 | machopic_asm_out_constructor (rtx symbol, int priority ATTRIBUTE_UNUSED) |
2cc07db4 | 1259 | { |
ab82a49f | 1260 | if (MACHOPIC_INDIRECT) |
56c779bc | 1261 | switch_to_section (darwin_sections[mod_init_section]); |
2cc07db4 | 1262 | else |
56c779bc | 1263 | switch_to_section (darwin_sections[constructor_section]); |
c8af3574 RH |
1264 | assemble_align (POINTER_SIZE); |
1265 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
2cc07db4 | 1266 | |
ab82a49f | 1267 | if (! MACHOPIC_INDIRECT) |
2cc07db4 RH |
1268 | fprintf (asm_out_file, ".reference .constructors_used\n"); |
1269 | } | |
1270 | ||
1271 | void | |
9c808aad | 1272 | machopic_asm_out_destructor (rtx symbol, int priority ATTRIBUTE_UNUSED) |
2cc07db4 | 1273 | { |
ab82a49f | 1274 | if (MACHOPIC_INDIRECT) |
56c779bc | 1275 | switch_to_section (darwin_sections[mod_term_section]); |
2cc07db4 | 1276 | else |
56c779bc | 1277 | switch_to_section (darwin_sections[destructor_section]); |
c8af3574 RH |
1278 | assemble_align (POINTER_SIZE); |
1279 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
2cc07db4 | 1280 | |
ab82a49f | 1281 | if (! MACHOPIC_INDIRECT) |
2cc07db4 RH |
1282 | fprintf (asm_out_file, ".reference .destructors_used\n"); |
1283 | } | |
e2500fed | 1284 | |
5eb99654 | 1285 | void |
9c808aad | 1286 | darwin_globalize_label (FILE *stream, const char *name) |
5eb99654 KG |
1287 | { |
1288 | if (!!strncmp (name, "_OBJC_", 6)) | |
1289 | default_globalize_label (stream, name); | |
1290 | } | |
1291 | ||
4746cf84 | 1292 | void |
083cad55 | 1293 | darwin_asm_named_section (const char *name, |
c18a5b6c MM |
1294 | unsigned int flags ATTRIBUTE_UNUSED, |
1295 | tree decl ATTRIBUTE_UNUSED) | |
4746cf84 | 1296 | { |
f1a66265 | 1297 | fprintf (asm_out_file, "\t.section %s\n", name); |
4746cf84 MA |
1298 | } |
1299 | ||
083cad55 | 1300 | void |
f1a66265 | 1301 | darwin_unique_section (tree decl ATTRIBUTE_UNUSED, int reloc ATTRIBUTE_UNUSED) |
4746cf84 | 1302 | { |
f1a66265 | 1303 | /* Darwin does not use unique sections. */ |
4746cf84 MA |
1304 | } |
1305 | ||
005c1a13 GK |
1306 | /* Handle a "weak_import" attribute; arguments as in |
1307 | struct attribute_spec.handler. */ | |
1308 | ||
1309 | tree | |
1310 | darwin_handle_weak_import_attribute (tree *node, tree name, | |
1311 | tree ARG_UNUSED (args), | |
1312 | int ARG_UNUSED (flags), | |
1313 | bool * no_add_attrs) | |
1314 | { | |
d7001ae5 | 1315 | if (TREE_CODE (*node) != FUNCTION_DECL && TREE_CODE (*node) != VAR_DECL) |
005c1a13 | 1316 | { |
5c498b10 DD |
1317 | warning (OPT_Wattributes, "%qs attribute ignored", |
1318 | IDENTIFIER_POINTER (name)); | |
005c1a13 GK |
1319 | *no_add_attrs = true; |
1320 | } | |
1321 | else | |
1322 | declare_weak (*node); | |
1323 | ||
1324 | return NULL_TREE; | |
1325 | } | |
45cc4783 MS |
1326 | |
1327 | static void | |
1328 | no_dead_strip (FILE *file, const char *lab) | |
1329 | { | |
005c1a13 | 1330 | fprintf (file, ".no_dead_strip %s\n", lab); |
45cc4783 MS |
1331 | } |
1332 | ||
083cad55 | 1333 | /* Emit a label for an FDE, making it global and/or weak if appropriate. |
eeab4d81 MS |
1334 | The third parameter is nonzero if this is for exception handling. |
1335 | The fourth parameter is nonzero if this is just a placeholder for an | |
4746cf84 | 1336 | FDE that we are omitting. */ |
eeab4d81 | 1337 | |
083cad55 | 1338 | void |
eeab4d81 | 1339 | darwin_emit_unwind_label (FILE *file, tree decl, int for_eh, int empty) |
4746cf84 | 1340 | { |
44ef77c1 EC |
1341 | const char *base; |
1342 | char *lab; | |
1343 | bool need_quotes; | |
4746cf84 | 1344 | |
44ef77c1 EC |
1345 | if (DECL_ASSEMBLER_NAME_SET_P (decl)) |
1346 | base = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); | |
1347 | else | |
1348 | base = IDENTIFIER_POINTER (DECL_NAME (decl)); | |
4746cf84 | 1349 | |
44ef77c1 EC |
1350 | base = targetm.strip_name_encoding (base); |
1351 | need_quotes = name_needs_quotes (base); | |
eeab4d81 MS |
1352 | |
1353 | if (! for_eh) | |
192d0f89 | 1354 | return; |
4746cf84 | 1355 | |
192d0f89 GK |
1356 | lab = concat (need_quotes ? "\"" : "", user_label_prefix, base, ".eh", |
1357 | need_quotes ? "\"" : "", NULL); | |
4746cf84 MA |
1358 | |
1359 | if (TREE_PUBLIC (decl)) | |
f1a66265 | 1360 | fprintf (file, "\t%s %s\n", |
4746cf84 MA |
1361 | (DECL_VISIBILITY (decl) != VISIBILITY_HIDDEN |
1362 | ? ".globl" | |
1363 | : ".private_extern"), | |
1364 | lab); | |
1365 | ||
f1a66265 GK |
1366 | if (DECL_WEAK (decl)) |
1367 | fprintf (file, "\t.weak_definition %s\n", lab); | |
4746cf84 MA |
1368 | |
1369 | if (empty) | |
45cc4783 MS |
1370 | { |
1371 | fprintf (file, "%s = 0\n", lab); | |
1372 | ||
1373 | /* Mark the absolute .eh and .eh1 style labels as needed to | |
1374 | ensure that we don't dead code strip them and keep such | |
1375 | labels from another instantiation point until we can fix this | |
1376 | properly with group comdat support. */ | |
1377 | no_dead_strip (file, lab); | |
1378 | } | |
4746cf84 MA |
1379 | else |
1380 | fprintf (file, "%s:\n", lab); | |
1381 | ||
1382 | free (lab); | |
1383 | } | |
1384 | ||
083cad55 EC |
1385 | static GTY(()) unsigned long except_table_label_num; |
1386 | ||
1387 | void | |
1388 | darwin_emit_except_table_label (FILE *file) | |
1389 | { | |
1390 | char section_start_label[30]; | |
1391 | ||
1392 | ASM_GENERATE_INTERNAL_LABEL (section_start_label, "GCC_except_table", | |
1393 | except_table_label_num++); | |
1394 | ASM_OUTPUT_LABEL (file, section_start_label); | |
1395 | } | |
1396 | /* Generate a PC-relative reference to a Mach-O non-lazy-symbol. */ | |
eeab4d81 | 1397 | |
4746cf84 MA |
1398 | void |
1399 | darwin_non_lazy_pcrel (FILE *file, rtx addr) | |
1400 | { | |
4746cf84 MA |
1401 | const char *nlp_name; |
1402 | ||
992d08b1 | 1403 | gcc_assert (GET_CODE (addr) == SYMBOL_REF); |
4746cf84 | 1404 | |
11abc112 | 1405 | nlp_name = machopic_indirection_name (addr, /*stub_p=*/false); |
4746cf84 MA |
1406 | fputs ("\t.long\t", file); |
1407 | ASM_OUTPUT_LABELREF (file, nlp_name); | |
1408 | fputs ("-.", file); | |
1409 | } | |
1410 | ||
6ce4806b MA |
1411 | /* Emit an assembler directive to set visibility for a symbol. The |
1412 | only supported visibilities are VISIBILITY_DEFAULT and | |
1413 | VISIBILITY_HIDDEN; the latter corresponds to Darwin's "private | |
1414 | extern". There is no MACH-O equivalent of ELF's | |
1415 | VISIBILITY_INTERNAL or VISIBILITY_PROTECTED. */ | |
1416 | ||
083cad55 | 1417 | void |
6ce4806b MA |
1418 | darwin_assemble_visibility (tree decl, int vis) |
1419 | { | |
1420 | if (vis == VISIBILITY_DEFAULT) | |
1421 | ; | |
1422 | else if (vis == VISIBILITY_HIDDEN) | |
1423 | { | |
1424 | fputs ("\t.private_extern ", asm_out_file); | |
1425 | assemble_name (asm_out_file, | |
1426 | (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)))); | |
1427 | fputs ("\n", asm_out_file); | |
1428 | } | |
1429 | else | |
5c498b10 DD |
1430 | warning (OPT_Wattributes, "internal and protected visibility attributes " |
1431 | "not supported in this configuration; ignored"); | |
6ce4806b MA |
1432 | } |
1433 | ||
7606e68f SS |
1434 | /* Output a difference of two labels that will be an assembly time |
1435 | constant if the two labels are local. (.long lab1-lab2 will be | |
1436 | very different if lab1 is at the boundary between two sections; it | |
1437 | will be relocated according to the second section, not the first, | |
1438 | so one ends up with a difference between labels in different | |
1439 | sections, which is bad in the dwarf2 eh context for instance.) */ | |
1440 | ||
1441 | static int darwin_dwarf_label_counter; | |
1442 | ||
1443 | void | |
59d8fe27 | 1444 | darwin_asm_output_dwarf_delta (FILE *file, int size, |
9c808aad | 1445 | const char *lab1, const char *lab2) |
7606e68f | 1446 | { |
4746cf84 MA |
1447 | int islocaldiff = (lab1[0] == '*' && lab1[1] == 'L' |
1448 | && lab2[0] == '*' && lab2[1] == 'L'); | |
d4b56511 | 1449 | const char *directive = (size == 8 ? ".quad" : ".long"); |
7606e68f SS |
1450 | |
1451 | if (islocaldiff) | |
1452 | fprintf (file, "\t.set L$set$%d,", darwin_dwarf_label_counter); | |
1453 | else | |
59d8fe27 | 1454 | fprintf (file, "\t%s\t", directive); |
57829bc4 | 1455 | assemble_name_raw (file, lab1); |
7606e68f | 1456 | fprintf (file, "-"); |
57829bc4 | 1457 | assemble_name_raw (file, lab2); |
7606e68f | 1458 | if (islocaldiff) |
59d8fe27 | 1459 | fprintf (file, "\n\t%s L$set$%d", directive, darwin_dwarf_label_counter++); |
7606e68f | 1460 | } |
192d0f89 GK |
1461 | |
1462 | /* Output labels for the start of the DWARF sections if necessary. */ | |
1463 | void | |
1464 | darwin_file_start (void) | |
1465 | { | |
1466 | if (write_symbols == DWARF2_DEBUG) | |
1467 | { | |
4f8bdef9 | 1468 | static const char * const debugnames[] = |
192d0f89 GK |
1469 | { |
1470 | DEBUG_FRAME_SECTION, | |
1471 | DEBUG_INFO_SECTION, | |
1472 | DEBUG_ABBREV_SECTION, | |
1473 | DEBUG_ARANGES_SECTION, | |
1474 | DEBUG_MACINFO_SECTION, | |
1475 | DEBUG_LINE_SECTION, | |
1476 | DEBUG_LOC_SECTION, | |
1477 | DEBUG_PUBNAMES_SECTION, | |
1478 | DEBUG_STR_SECTION, | |
1479 | DEBUG_RANGES_SECTION | |
1480 | }; | |
1481 | size_t i; | |
1482 | ||
1483 | for (i = 0; i < ARRAY_SIZE (debugnames); i++) | |
1484 | { | |
1485 | int namelen; | |
1486 | ||
1487 | switch_to_section (get_section (debugnames[i], SECTION_DEBUG, NULL)); | |
4f8bdef9 | 1488 | |
192d0f89 GK |
1489 | gcc_assert (strncmp (debugnames[i], "__DWARF,", 8) == 0); |
1490 | gcc_assert (strchr (debugnames[i] + 8, ',')); | |
4f8bdef9 | 1491 | |
192d0f89 GK |
1492 | namelen = strchr (debugnames[i] + 8, ',') - (debugnames[i] + 8); |
1493 | fprintf (asm_out_file, "Lsection%.*s:\n", namelen, debugnames[i] + 8); | |
1494 | } | |
1495 | } | |
1496 | } | |
1497 | ||
1498 | /* Output an offset in a DWARF section on Darwin. On Darwin, DWARF section | |
1499 | offsets are not represented using relocs in .o files; either the | |
1500 | section never leaves the .o file, or the linker or other tool is | |
1501 | responsible for parsing the DWARF and updating the offsets. */ | |
1502 | ||
1503 | void | |
1504 | darwin_asm_output_dwarf_offset (FILE *file, int size, const char * lab, | |
1505 | section *base) | |
1506 | { | |
1507 | char sname[64]; | |
1508 | int namelen; | |
4f8bdef9 | 1509 | |
192d0f89 GK |
1510 | gcc_assert (base->common.flags & SECTION_NAMED); |
1511 | gcc_assert (strncmp (base->named.name, "__DWARF,", 8) == 0); | |
1512 | gcc_assert (strchr (base->named.name + 8, ',')); | |
1513 | ||
1514 | namelen = strchr (base->named.name + 8, ',') - (base->named.name + 8); | |
1515 | sprintf (sname, "*Lsection%.*s", namelen, base->named.name + 8); | |
1516 | darwin_asm_output_dwarf_delta (file, size, lab, sname); | |
1517 | } | |
7606e68f | 1518 | |
a5fe455b | 1519 | void |
9c808aad | 1520 | darwin_file_end (void) |
a5fe455b ZW |
1521 | { |
1522 | machopic_finish (asm_out_file); | |
1523 | if (strcmp (lang_hooks.name, "GNU C++") == 0) | |
1524 | { | |
56c779bc GK |
1525 | switch_to_section (darwin_sections[constructor_section]); |
1526 | switch_to_section (darwin_sections[destructor_section]); | |
a5fe455b ZW |
1527 | ASM_OUTPUT_ALIGN (asm_out_file, 1); |
1528 | } | |
92b9a671 | 1529 | fprintf (asm_out_file, "\t.subsections_via_symbols\n"); |
a5fe455b ZW |
1530 | } |
1531 | ||
31920d83 DJ |
1532 | /* Cross-module name binding. Darwin does not support overriding |
1533 | functions at dynamic-link time. */ | |
1534 | ||
1535 | bool | |
1536 | darwin_binds_local_p (tree decl) | |
1537 | { | |
1538 | return default_binds_local_p_1 (decl, 0); | |
1539 | } | |
1540 | ||
23f99493 MS |
1541 | #if 0 |
1542 | /* See TARGET_ASM_OUTPUT_ANCHOR for why we can't do this yet. */ | |
ab0ff804 AP |
1543 | /* The Darwin's implementation of TARGET_ASM_OUTPUT_ANCHOR. Define the |
1544 | anchor relative to ".", the current section position. We cannot use | |
1545 | the default one because ASM_OUTPUT_DEF is wrong for Darwin. */ | |
1546 | ||
1547 | void | |
1548 | darwin_asm_output_anchor (rtx symbol) | |
1549 | { | |
1550 | fprintf (asm_out_file, "\t.set\t"); | |
1551 | assemble_name (asm_out_file, XSTR (symbol, 0)); | |
1552 | fprintf (asm_out_file, ", . + " HOST_WIDE_INT_PRINT_DEC "\n", | |
1553 | SYMBOL_REF_BLOCK_OFFSET (symbol)); | |
1554 | } | |
23f99493 | 1555 | #endif |
ab0ff804 | 1556 | |
4f8bdef9 EC |
1557 | /* Set the darwin specific attributes on TYPE. */ |
1558 | void | |
1559 | darwin_set_default_type_attributes (tree type) | |
1560 | { | |
1561 | if (darwin_ms_struct | |
1562 | && TREE_CODE (type) == RECORD_TYPE) | |
1563 | TYPE_ATTRIBUTES (type) = tree_cons (get_identifier ("ms_struct"), | |
1564 | NULL_TREE, | |
1565 | TYPE_ATTRIBUTES (type)); | |
1566 | } | |
1567 | ||
e2500fed | 1568 | #include "gt-darwin.h" |