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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 | |
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 | ||
62baeb4f EC |
223 | /* If we aren't generating fix-and-continue code, don't do anything |
224 | special. */ | |
699c914a MS |
225 | if (TARGET_FIX_AND_CONTINUE == 0) |
226 | return 0; | |
227 | ||
228 | /* Otherwise, all symbol except symbols that begin with L or _OBJC_ | |
229 | are indirected. Symbols that begin with L and _OBJC_ are always | |
230 | bound to the current translation unit as they are used for | |
231 | generated local data of the translation unit. */ | |
232 | ||
233 | name = XSTR (sym_ref, 0); | |
234 | ||
235 | lprefix = (((name[0] == '*' || name[0] == '&') | |
236 | && (name[1] == 'L' || (name[1] == '"' && name[2] == 'L'))) | |
ad6aaeb6 | 237 | || (strncmp (name, "_OBJC_", 6) == 0)); |
699c914a MS |
238 | |
239 | return ! lprefix; | |
240 | } | |
241 | ||
242 | ||
ee890fe2 | 243 | static int |
11abc112 | 244 | machopic_data_defined_p (rtx sym_ref) |
ee890fe2 | 245 | { |
699c914a MS |
246 | if (indirect_data (sym_ref)) |
247 | return 0; | |
248 | ||
11abc112 | 249 | switch (machopic_classify_symbol (sym_ref)) |
ee890fe2 SS |
250 | { |
251 | case MACHOPIC_DEFINED_DATA: | |
0e1ad529 | 252 | case MACHOPIC_DEFINED_FUNCTION: |
ee890fe2 SS |
253 | return 1; |
254 | default: | |
255 | return 0; | |
256 | } | |
257 | } | |
258 | ||
ee890fe2 | 259 | void |
11abc112 | 260 | machopic_define_symbol (rtx mem) |
ee890fe2 | 261 | { |
11abc112 | 262 | rtx sym_ref; |
083cad55 | 263 | |
992d08b1 | 264 | gcc_assert (GET_CODE (mem) == MEM); |
11abc112 MM |
265 | sym_ref = XEXP (mem, 0); |
266 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; | |
ee890fe2 SS |
267 | } |
268 | ||
6788f5ca | 269 | static GTY(()) char * function_base; |
ee890fe2 | 270 | |
92c1a778 | 271 | const char * |
9c808aad | 272 | machopic_function_base_name (void) |
ee890fe2 | 273 | { |
ab82a49f | 274 | /* if dynamic-no-pic is on, we should not get here */ |
992d08b1 | 275 | gcc_assert (!MACHO_DYNAMIC_NO_PIC_P); |
ee890fe2 | 276 | |
1622229c | 277 | if (function_base == NULL) |
9c808aad | 278 | function_base = |
1622229c AP |
279 | (char *) ggc_alloc_string ("<pic base>", sizeof ("<pic base>")); |
280 | ||
281 | current_function_uses_pic_offset_table = 1; | |
282 | ||
283 | return function_base; | |
284 | } | |
285 | ||
11abc112 MM |
286 | /* Return a SYMBOL_REF for the PIC function base. */ |
287 | ||
288 | rtx | |
289 | machopic_function_base_sym (void) | |
290 | { | |
291 | rtx sym_ref; | |
292 | ||
293 | sym_ref = gen_rtx_SYMBOL_REF (Pmode, machopic_function_base_name ()); | |
083cad55 | 294 | SYMBOL_REF_FLAGS (sym_ref) |
11abc112 MM |
295 | |= (MACHO_SYMBOL_FLAG_VARIABLE | MACHO_SYMBOL_FLAG_DEFINED); |
296 | return sym_ref; | |
297 | } | |
298 | ||
14a07c92 PB |
299 | /* Return either ORIG or (const:P (minus:P ORIG PIC_BASE)), depending |
300 | on whether pic_base is NULL or not. */ | |
301 | static inline rtx | |
302 | gen_pic_offset (rtx orig, rtx pic_base) | |
303 | { | |
304 | if (!pic_base) | |
305 | return orig; | |
306 | else | |
307 | return gen_rtx_CONST (Pmode, gen_rtx_MINUS (Pmode, orig, pic_base)); | |
308 | } | |
309 | ||
1622229c AP |
310 | static GTY(()) const char * function_base_func_name; |
311 | static GTY(()) int current_pic_label_num; | |
312 | ||
313 | void | |
314 | machopic_output_function_base_name (FILE *file) | |
315 | { | |
316 | const char *current_name; | |
317 | ||
ff482c8d | 318 | /* If dynamic-no-pic is on, we should not get here. */ |
992d08b1 | 319 | gcc_assert (!MACHO_DYNAMIC_NO_PIC_P); |
9c808aad | 320 | current_name = |
1622229c | 321 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl)); |
6788f5ca | 322 | if (function_base_func_name != current_name) |
ee890fe2 | 323 | { |
ee890fe2 | 324 | ++current_pic_label_num; |
6788f5ca | 325 | function_base_func_name = current_name; |
ee890fe2 | 326 | } |
1622229c | 327 | fprintf (file, "\"L%011d$pb\"", current_pic_label_num); |
ee890fe2 SS |
328 | } |
329 | ||
11abc112 MM |
330 | /* The suffix attached to non-lazy pointer symbols. */ |
331 | #define NON_LAZY_POINTER_SUFFIX "$non_lazy_ptr" | |
332 | /* The suffix attached to stub symbols. */ | |
333 | #define STUB_SUFFIX "$stub" | |
ee890fe2 | 334 | |
11abc112 | 335 | typedef struct machopic_indirection GTY (()) |
ee890fe2 | 336 | { |
11abc112 MM |
337 | /* The SYMBOL_REF for the entity referenced. */ |
338 | rtx symbol; | |
1adaa117 GK |
339 | /* The name of the stub or non-lazy pointer. */ |
340 | const char * ptr_name; | |
11abc112 MM |
341 | /* True iff this entry is for a stub (as opposed to a non-lazy |
342 | pointer). */ | |
343 | bool stub_p; | |
344 | /* True iff this stub or pointer pointer has been referenced. */ | |
345 | bool used; | |
346 | } machopic_indirection; | |
347 | ||
348 | /* A table mapping stub names and non-lazy pointer names to | |
349 | SYMBOL_REFs for the stubbed-to and pointed-to entities. */ | |
350 | ||
083cad55 | 351 | static GTY ((param_is (struct machopic_indirection))) htab_t |
11abc112 MM |
352 | machopic_indirections; |
353 | ||
354 | /* Return a hash value for a SLOT in the indirections hash table. */ | |
355 | ||
356 | static hashval_t | |
357 | machopic_indirection_hash (const void *slot) | |
358 | { | |
359 | const machopic_indirection *p = (const machopic_indirection *) slot; | |
1adaa117 | 360 | return htab_hash_string (p->ptr_name); |
11abc112 | 361 | } |
9c808aad | 362 | |
11abc112 MM |
363 | /* Returns true if the KEY is the same as that associated with |
364 | SLOT. */ | |
365 | ||
366 | static int | |
367 | machopic_indirection_eq (const void *slot, const void *key) | |
368 | { | |
1adaa117 | 369 | return strcmp (((const machopic_indirection *) slot)->ptr_name, key) == 0; |
11abc112 | 370 | } |
ee890fe2 | 371 | |
11abc112 MM |
372 | /* Return the name of the non-lazy pointer (if STUB_P is false) or |
373 | stub (if STUB_B is true) corresponding to the given name. */ | |
df56a27f | 374 | |
11abc112 MM |
375 | const char * |
376 | machopic_indirection_name (rtx sym_ref, bool stub_p) | |
377 | { | |
378 | char *buffer; | |
379 | const char *name = XSTR (sym_ref, 0); | |
1adaa117 | 380 | size_t namelen = strlen (name); |
11abc112 | 381 | machopic_indirection *p; |
1adaa117 | 382 | void ** slot; |
3d20d4d8 MS |
383 | bool saw_star = false; |
384 | bool needs_quotes; | |
385 | const char *suffix; | |
386 | const char *prefix = user_label_prefix; | |
387 | const char *quote = ""; | |
0a6a4494 AO |
388 | tree id; |
389 | ||
390 | id = maybe_get_identifier (name); | |
391 | if (id) | |
392 | { | |
393 | tree id_orig = id; | |
394 | ||
395 | while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
396 | id = TREE_CHAIN (id); | |
397 | if (id != id_orig) | |
398 | { | |
399 | name = IDENTIFIER_POINTER (id); | |
400 | namelen = strlen (name); | |
401 | } | |
402 | } | |
083cad55 | 403 | |
3d20d4d8 | 404 | if (name[0] == '*') |
df56a27f | 405 | { |
3d20d4d8 MS |
406 | saw_star = true; |
407 | prefix = ""; | |
408 | ++name; | |
409 | --namelen; | |
11abc112 | 410 | } |
3d20d4d8 MS |
411 | |
412 | needs_quotes = name_needs_quotes (name); | |
413 | if (needs_quotes) | |
11abc112 | 414 | { |
3d20d4d8 | 415 | quote = "\""; |
df56a27f SS |
416 | } |
417 | ||
3d20d4d8 MS |
418 | if (stub_p) |
419 | suffix = STUB_SUFFIX; | |
420 | else | |
421 | suffix = NON_LAZY_POINTER_SUFFIX; | |
422 | ||
423 | buffer = alloca (strlen ("&L") | |
424 | + strlen (prefix) | |
425 | + namelen | |
426 | + strlen (suffix) | |
427 | + 2 * strlen (quote) | |
428 | + 1 /* '\0' */); | |
429 | ||
430 | /* Construct the name of the non-lazy pointer or stub. */ | |
431 | sprintf (buffer, "&%sL%s%s%s%s", quote, prefix, name, suffix, quote); | |
432 | ||
1adaa117 | 433 | if (!machopic_indirections) |
083cad55 | 434 | machopic_indirections = htab_create_ggc (37, |
1adaa117 GK |
435 | machopic_indirection_hash, |
436 | machopic_indirection_eq, | |
437 | /*htab_del=*/NULL); | |
083cad55 | 438 | |
1adaa117 GK |
439 | slot = htab_find_slot_with_hash (machopic_indirections, buffer, |
440 | htab_hash_string (buffer), INSERT); | |
441 | if (*slot) | |
442 | { | |
443 | p = (machopic_indirection *) *slot; | |
444 | } | |
445 | else | |
11abc112 | 446 | { |
11abc112 MM |
447 | p = (machopic_indirection *) ggc_alloc (sizeof (machopic_indirection)); |
448 | p->symbol = sym_ref; | |
1adaa117 | 449 | p->ptr_name = xstrdup (buffer); |
11abc112 | 450 | p->stub_p = stub_p; |
1adaa117 GK |
451 | p->used = false; |
452 | *slot = p; | |
11abc112 | 453 | } |
083cad55 | 454 | |
1adaa117 | 455 | return p->ptr_name; |
ee890fe2 SS |
456 | } |
457 | ||
11abc112 | 458 | /* Return the name of the stub for the mcount function. */ |
ee890fe2 | 459 | |
11abc112 MM |
460 | const char* |
461 | machopic_mcount_stub_name (void) | |
ee890fe2 | 462 | { |
76f60aa5 AP |
463 | rtx symbol = gen_rtx_SYMBOL_REF (Pmode, "*mcount"); |
464 | return machopic_indirection_name (symbol, /*stub_p=*/true); | |
ee890fe2 SS |
465 | } |
466 | ||
11abc112 MM |
467 | /* If NAME is the name of a stub or a non-lazy pointer , mark the stub |
468 | or non-lazy pointer as used -- and mark the object to which the | |
469 | pointer/stub refers as used as well, since the pointer/stub will | |
470 | emit a reference to it. */ | |
471 | ||
ee890fe2 | 472 | void |
11abc112 | 473 | machopic_validate_stub_or_non_lazy_ptr (const char *name) |
ee890fe2 | 474 | { |
11abc112 | 475 | machopic_indirection *p; |
083cad55 EC |
476 | |
477 | p = ((machopic_indirection *) | |
1adaa117 GK |
478 | (htab_find_with_hash (machopic_indirections, name, |
479 | htab_hash_string (name)))); | |
480 | if (p && ! p->used) | |
11abc112 | 481 | { |
1adaa117 GK |
482 | const char *real_name; |
483 | tree id; | |
083cad55 | 484 | |
1adaa117 GK |
485 | p->used = true; |
486 | ||
ca472546 GK |
487 | /* Do what output_addr_const will do when we actually call it. */ |
488 | if (SYMBOL_REF_DECL (p->symbol)) | |
489 | mark_decl_referenced (SYMBOL_REF_DECL (p->symbol)); | |
490 | ||
491 | real_name = targetm.strip_name_encoding (XSTR (p->symbol, 0)); | |
083cad55 | 492 | |
1adaa117 GK |
493 | id = maybe_get_identifier (real_name); |
494 | if (id) | |
495 | mark_referenced (id); | |
11abc112 | 496 | } |
ee890fe2 SS |
497 | } |
498 | ||
499 | /* Transform ORIG, which may be any data source, to the corresponding | |
500 | source using indirections. */ | |
501 | ||
502 | rtx | |
9c808aad | 503 | machopic_indirect_data_reference (rtx orig, rtx reg) |
ee890fe2 SS |
504 | { |
505 | rtx ptr_ref = orig; | |
9c808aad | 506 | |
ee890fe2 SS |
507 | if (! MACHOPIC_INDIRECT) |
508 | return orig; | |
509 | ||
510 | if (GET_CODE (orig) == SYMBOL_REF) | |
511 | { | |
11abc112 | 512 | int defined = machopic_data_defined_p (orig); |
ab82a49f AP |
513 | |
514 | if (defined && MACHO_DYNAMIC_NO_PIC_P) | |
515 | { | |
516 | #if defined (TARGET_TOC) | |
4f8dbd34 AP |
517 | /* Create a new register for CSE opportunities. */ |
518 | rtx hi_reg = (no_new_pseudos ? reg : gen_reg_rtx (Pmode)); | |
519 | emit_insn (gen_macho_high (hi_reg, orig)); | |
520 | emit_insn (gen_macho_low (reg, hi_reg, orig)); | |
ab82a49f AP |
521 | #else |
522 | /* some other cpu -- writeme! */ | |
992d08b1 | 523 | gcc_unreachable (); |
ab82a49f AP |
524 | #endif |
525 | return reg; | |
526 | } | |
527 | else if (defined) | |
ee890fe2 | 528 | { |
7ae8cf75 | 529 | #if defined (TARGET_TOC) || defined (HAVE_lo_sum) |
11abc112 | 530 | rtx pic_base = machopic_function_base_sym (); |
14a07c92 | 531 | rtx offset = gen_pic_offset (orig, pic_base); |
7ae8cf75 | 532 | #endif |
ee890fe2 SS |
533 | |
534 | #if defined (TARGET_TOC) /* i.e., PowerPC */ | |
d9b46dfb | 535 | rtx hi_sum_reg = (no_new_pseudos ? reg : gen_reg_rtx (Pmode)); |
ee890fe2 | 536 | |
992d08b1 | 537 | gcc_assert (reg); |
ee890fe2 | 538 | |
6f94a68e GK |
539 | emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, |
540 | gen_rtx_PLUS (Pmode, pic_offset_table_rtx, | |
541 | gen_rtx_HIGH (Pmode, offset)))); | |
542 | emit_insn (gen_rtx_SET (Pmode, reg, | |
543 | gen_rtx_LO_SUM (Pmode, hi_sum_reg, offset))); | |
ee890fe2 SS |
544 | |
545 | orig = reg; | |
546 | #else | |
547 | #if defined (HAVE_lo_sum) | |
992d08b1 | 548 | gcc_assert (reg); |
ee890fe2 | 549 | |
6f94a68e GK |
550 | emit_insn (gen_rtx_SET (VOIDmode, reg, |
551 | gen_rtx_HIGH (Pmode, offset))); | |
552 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
553 | gen_rtx_LO_SUM (Pmode, reg, offset))); | |
554 | emit_insn (gen_rtx_USE (VOIDmode, pic_offset_table_rtx)); | |
ee890fe2 | 555 | |
6f94a68e | 556 | orig = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, reg); |
ee890fe2 SS |
557 | #endif |
558 | #endif | |
559 | return orig; | |
560 | } | |
561 | ||
828a4fe4 | 562 | ptr_ref = (gen_rtx_SYMBOL_REF |
083cad55 | 563 | (Pmode, |
11abc112 | 564 | machopic_indirection_name (orig, /*stub_p=*/false))); |
ee890fe2 | 565 | |
c185c797 | 566 | SYMBOL_REF_DATA (ptr_ref) = SYMBOL_REF_DATA (orig); |
c0d594f1 | 567 | |
542a8afa | 568 | ptr_ref = gen_const_mem (Pmode, ptr_ref); |
828a4fe4 | 569 | machopic_define_symbol (ptr_ref); |
ee890fe2 SS |
570 | |
571 | return ptr_ref; | |
572 | } | |
573 | else if (GET_CODE (orig) == CONST) | |
574 | { | |
575 | rtx base, result; | |
576 | ||
577 | /* legitimize both operands of the PLUS */ | |
578 | if (GET_CODE (XEXP (orig, 0)) == PLUS) | |
579 | { | |
580 | base = machopic_indirect_data_reference (XEXP (XEXP (orig, 0), 0), | |
581 | reg); | |
582 | orig = machopic_indirect_data_reference (XEXP (XEXP (orig, 0), 1), | |
583 | (base == reg ? 0 : reg)); | |
584 | } | |
9c808aad | 585 | else |
ee890fe2 SS |
586 | return orig; |
587 | ||
588 | if (MACHOPIC_PURE && GET_CODE (orig) == CONST_INT) | |
ed8908e7 | 589 | result = plus_constant (base, INTVAL (orig)); |
ee890fe2 | 590 | else |
6f94a68e | 591 | result = gen_rtx_PLUS (Pmode, base, orig); |
ee890fe2 | 592 | |
ee890fe2 SS |
593 | if (MACHOPIC_JUST_INDIRECT && GET_CODE (base) == MEM) |
594 | { | |
595 | if (reg) | |
596 | { | |
597 | emit_move_insn (reg, result); | |
598 | result = reg; | |
599 | } | |
600 | else | |
601 | { | |
602 | result = force_reg (GET_MODE (result), result); | |
603 | } | |
604 | } | |
605 | ||
606 | return result; | |
607 | ||
608 | } | |
609 | else if (GET_CODE (orig) == MEM) | |
610 | XEXP (ptr_ref, 0) = machopic_indirect_data_reference (XEXP (orig, 0), reg); | |
611 | /* When the target is i386, this code prevents crashes due to the | |
612 | compiler's ignorance on how to move the PIC base register to | |
613 | other registers. (The reload phase sometimes introduces such | |
614 | insns.) */ | |
615 | else if (GET_CODE (orig) == PLUS | |
616 | && GET_CODE (XEXP (orig, 0)) == REG | |
617 | && REGNO (XEXP (orig, 0)) == PIC_OFFSET_TABLE_REGNUM | |
618 | #ifdef I386 | |
619 | /* Prevent the same register from being erroneously used | |
620 | as both the base and index registers. */ | |
621 | && GET_CODE (XEXP (orig, 1)) == CONST | |
622 | #endif | |
623 | && reg) | |
624 | { | |
625 | emit_move_insn (reg, XEXP (orig, 0)); | |
626 | XEXP (ptr_ref, 0) = reg; | |
627 | } | |
628 | return ptr_ref; | |
629 | } | |
630 | ||
ee890fe2 SS |
631 | /* Transform TARGET (a MEM), which is a function call target, to the |
632 | corresponding symbol_stub if necessary. Return a new MEM. */ | |
633 | ||
634 | rtx | |
9c808aad | 635 | machopic_indirect_call_target (rtx target) |
ee890fe2 SS |
636 | { |
637 | if (GET_CODE (target) != MEM) | |
638 | return target; | |
639 | ||
083cad55 | 640 | if (MACHOPIC_INDIRECT |
11abc112 MM |
641 | && GET_CODE (XEXP (target, 0)) == SYMBOL_REF |
642 | && !(SYMBOL_REF_FLAGS (XEXP (target, 0)) | |
643 | & MACHO_SYMBOL_FLAG_DEFINED)) | |
9c808aad | 644 | { |
11abc112 | 645 | rtx sym_ref = XEXP (target, 0); |
083cad55 | 646 | const char *stub_name = machopic_indirection_name (sym_ref, |
11abc112 MM |
647 | /*stub_p=*/true); |
648 | enum machine_mode mode = GET_MODE (sym_ref); | |
083cad55 | 649 | |
11abc112 | 650 | XEXP (target, 0) = gen_rtx_SYMBOL_REF (mode, stub_name); |
c185c797 | 651 | SYMBOL_REF_DATA (XEXP (target, 0)) = SYMBOL_REF_DATA (sym_ref); |
389fdba0 | 652 | MEM_READONLY_P (target) = 1; |
542a8afa | 653 | MEM_NOTRAP_P (target) = 1; |
ee890fe2 SS |
654 | } |
655 | ||
656 | return target; | |
657 | } | |
658 | ||
659 | rtx | |
9c808aad | 660 | machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg) |
ee890fe2 SS |
661 | { |
662 | rtx pic_ref = orig; | |
663 | ||
ab82a49f | 664 | if (! MACHOPIC_INDIRECT) |
ee890fe2 SS |
665 | return orig; |
666 | ||
667 | /* First handle a simple SYMBOL_REF or LABEL_REF */ | |
668 | if (GET_CODE (orig) == LABEL_REF | |
669 | || (GET_CODE (orig) == SYMBOL_REF | |
670 | )) | |
671 | { | |
672 | /* addr(foo) = &func+(foo-func) */ | |
673 | rtx pic_base; | |
674 | ||
675 | orig = machopic_indirect_data_reference (orig, reg); | |
676 | ||
9c808aad | 677 | if (GET_CODE (orig) == PLUS |
ee890fe2 SS |
678 | && GET_CODE (XEXP (orig, 0)) == REG) |
679 | { | |
680 | if (reg == 0) | |
681 | return force_reg (mode, orig); | |
682 | ||
683 | emit_move_insn (reg, orig); | |
684 | return reg; | |
9c808aad | 685 | } |
ee890fe2 | 686 | |
14a07c92 | 687 | /* if dynamic-no-pic we don't have a pic base */ |
ab82a49f | 688 | if (MACHO_DYNAMIC_NO_PIC_P) |
14a07c92 | 689 | pic_base = NULL; |
ab82a49f | 690 | else |
11abc112 | 691 | pic_base = machopic_function_base_sym (); |
ee890fe2 SS |
692 | |
693 | if (GET_CODE (orig) == MEM) | |
694 | { | |
695 | if (reg == 0) | |
696 | { | |
992d08b1 NS |
697 | gcc_assert (!reload_in_progress); |
698 | reg = gen_reg_rtx (Pmode); | |
ee890fe2 | 699 | } |
9c808aad | 700 | |
ee890fe2 | 701 | #ifdef HAVE_lo_sum |
ab82a49f AP |
702 | if (MACHO_DYNAMIC_NO_PIC_P |
703 | && (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
704 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF)) | |
705 | { | |
706 | #if defined (TARGET_TOC) /* ppc */ | |
707 | rtx temp_reg = (no_new_pseudos) ? reg : gen_reg_rtx (Pmode); | |
708 | rtx asym = XEXP (orig, 0); | |
709 | rtx mem; | |
710 | ||
b8a55285 | 711 | emit_insn (gen_macho_high (temp_reg, asym)); |
542a8afa RH |
712 | mem = gen_const_mem (GET_MODE (orig), |
713 | gen_rtx_LO_SUM (Pmode, temp_reg, asym)); | |
6f94a68e | 714 | emit_insn (gen_rtx_SET (VOIDmode, reg, mem)); |
ab82a49f | 715 | #else |
62baeb4f EC |
716 | /* Some other CPU -- WriteMe! but right now there are no other |
717 | platforms that can use dynamic-no-pic */ | |
992d08b1 | 718 | gcc_unreachable (); |
ab82a49f AP |
719 | #endif |
720 | pic_ref = reg; | |
721 | } | |
722 | else | |
9c808aad | 723 | if (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF |
ee890fe2 SS |
724 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) |
725 | { | |
14a07c92 | 726 | rtx offset = gen_pic_offset (XEXP (orig, 0), pic_base); |
ee890fe2 SS |
727 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
728 | /* Generating a new reg may expose opportunities for | |
729 | common subexpression elimination. */ | |
49bd1d27 | 730 | rtx hi_sum_reg = no_new_pseudos ? reg : gen_reg_rtx (Pmode); |
6f94a68e GK |
731 | rtx mem; |
732 | rtx insn; | |
733 | rtx sum; | |
083cad55 | 734 | |
6f94a68e GK |
735 | sum = gen_rtx_HIGH (Pmode, offset); |
736 | if (! MACHO_DYNAMIC_NO_PIC_P) | |
737 | sum = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, sum); | |
ee890fe2 | 738 | |
6f94a68e GK |
739 | emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, sum)); |
740 | ||
542a8afa | 741 | mem = gen_const_mem (GET_MODE (orig), |
083cad55 | 742 | gen_rtx_LO_SUM (Pmode, |
542a8afa | 743 | hi_sum_reg, offset)); |
6f94a68e | 744 | insn = emit_insn (gen_rtx_SET (VOIDmode, reg, mem)); |
083cad55 | 745 | REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_EQUAL, pic_ref, |
6f94a68e GK |
746 | REG_NOTES (insn)); |
747 | ||
748 | pic_ref = reg; | |
ee890fe2 | 749 | #else |
6f94a68e | 750 | emit_insn (gen_rtx_USE (VOIDmode, |
083cad55 | 751 | gen_rtx_REG (Pmode, |
6f94a68e GK |
752 | PIC_OFFSET_TABLE_REGNUM))); |
753 | ||
754 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
755 | gen_rtx_HIGH (Pmode, | |
083cad55 | 756 | gen_rtx_CONST (Pmode, |
6f94a68e GK |
757 | offset)))); |
758 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
759 | gen_rtx_LO_SUM (Pmode, reg, | |
760 | gen_rtx_CONST (Pmode, offset)))); | |
761 | pic_ref = gen_rtx_PLUS (Pmode, | |
762 | pic_offset_table_rtx, reg); | |
ee890fe2 SS |
763 | #endif |
764 | } | |
765 | else | |
766 | #endif /* HAVE_lo_sum */ | |
767 | { | |
768 | rtx pic = pic_offset_table_rtx; | |
769 | if (GET_CODE (pic) != REG) | |
770 | { | |
771 | emit_move_insn (reg, pic); | |
772 | pic = reg; | |
773 | } | |
774 | #if 0 | |
6f94a68e | 775 | emit_insn (gen_rtx_USE (VOIDmode, |
083cad55 | 776 | gen_rtx_REG (Pmode, |
6f94a68e | 777 | PIC_OFFSET_TABLE_REGNUM))); |
ee890fe2 SS |
778 | #endif |
779 | ||
7d072037 SH |
780 | if (reload_in_progress) |
781 | regs_ever_live[REGNO (pic)] = 1; | |
14a07c92 PB |
782 | pic_ref = gen_rtx_PLUS (Pmode, pic, |
783 | gen_pic_offset (XEXP (orig, 0), | |
784 | pic_base)); | |
ee890fe2 | 785 | } |
9c808aad | 786 | |
ee890fe2 | 787 | #if !defined (TARGET_TOC) |
ee890fe2 | 788 | emit_move_insn (reg, pic_ref); |
542a8afa | 789 | pic_ref = gen_const_mem (GET_MODE (orig), reg); |
f9b0ac3b | 790 | #endif |
ee890fe2 SS |
791 | } |
792 | else | |
793 | { | |
794 | ||
795 | #ifdef HAVE_lo_sum | |
9c808aad | 796 | if (GET_CODE (orig) == SYMBOL_REF |
ee890fe2 SS |
797 | || GET_CODE (orig) == LABEL_REF) |
798 | { | |
14a07c92 | 799 | rtx offset = gen_pic_offset (orig, pic_base); |
ee890fe2 SS |
800 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
801 | rtx hi_sum_reg; | |
802 | ||
803 | if (reg == 0) | |
804 | { | |
992d08b1 NS |
805 | gcc_assert (!reload_in_progress); |
806 | reg = gen_reg_rtx (Pmode); | |
ee890fe2 | 807 | } |
9c808aad | 808 | |
ee890fe2 SS |
809 | hi_sum_reg = reg; |
810 | ||
6f94a68e GK |
811 | emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, |
812 | (MACHO_DYNAMIC_NO_PIC_P) | |
813 | ? gen_rtx_HIGH (Pmode, offset) | |
814 | : gen_rtx_PLUS (Pmode, | |
815 | pic_offset_table_rtx, | |
083cad55 | 816 | gen_rtx_HIGH (Pmode, |
6f94a68e GK |
817 | offset)))); |
818 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
819 | gen_rtx_LO_SUM (Pmode, | |
820 | hi_sum_reg, offset))); | |
ee890fe2 SS |
821 | pic_ref = reg; |
822 | #else | |
6f94a68e GK |
823 | emit_insn (gen_rtx_SET (VOIDmode, reg, |
824 | gen_rtx_HIGH (Pmode, offset))); | |
825 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
826 | gen_rtx_LO_SUM (Pmode, reg, offset))); | |
827 | pic_ref = gen_rtx_PLUS (Pmode, | |
828 | pic_offset_table_rtx, reg); | |
ee890fe2 SS |
829 | #endif |
830 | } | |
831 | else | |
832 | #endif /* HAVE_lo_sum */ | |
833 | { | |
83cf88cb AP |
834 | if (REG_P (orig) |
835 | || GET_CODE (orig) == SUBREG) | |
ee890fe2 SS |
836 | { |
837 | return orig; | |
838 | } | |
839 | else | |
840 | { | |
841 | rtx pic = pic_offset_table_rtx; | |
842 | if (GET_CODE (pic) != REG) | |
843 | { | |
844 | emit_move_insn (reg, pic); | |
845 | pic = reg; | |
846 | } | |
847 | #if 0 | |
6f94a68e GK |
848 | emit_insn (gen_rtx_USE (VOIDmode, |
849 | pic_offset_table_rtx)); | |
ee890fe2 | 850 | #endif |
7d072037 SH |
851 | if (reload_in_progress) |
852 | regs_ever_live[REGNO (pic)] = 1; | |
6f94a68e GK |
853 | pic_ref = gen_rtx_PLUS (Pmode, |
854 | pic, | |
14a07c92 | 855 | gen_pic_offset (orig, pic_base)); |
ee890fe2 SS |
856 | } |
857 | } | |
858 | } | |
859 | ||
ee890fe2 SS |
860 | if (GET_CODE (pic_ref) != REG) |
861 | { | |
862 | if (reg != 0) | |
863 | { | |
864 | emit_move_insn (reg, pic_ref); | |
865 | return reg; | |
866 | } | |
867 | else | |
868 | { | |
869 | return force_reg (mode, pic_ref); | |
870 | } | |
871 | } | |
872 | else | |
873 | { | |
874 | return pic_ref; | |
875 | } | |
876 | } | |
877 | ||
878 | else if (GET_CODE (orig) == SYMBOL_REF) | |
879 | return orig; | |
880 | ||
881 | else if (GET_CODE (orig) == PLUS | |
882 | && (GET_CODE (XEXP (orig, 0)) == MEM | |
883 | || GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
884 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) | |
885 | && XEXP (orig, 0) != pic_offset_table_rtx | |
886 | && GET_CODE (XEXP (orig, 1)) != REG) | |
9c808aad | 887 | |
ee890fe2 SS |
888 | { |
889 | rtx base; | |
890 | int is_complex = (GET_CODE (XEXP (orig, 0)) == MEM); | |
891 | ||
892 | base = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
893 | orig = machopic_legitimize_pic_address (XEXP (orig, 1), | |
894 | Pmode, (base == reg ? 0 : reg)); | |
895 | if (GET_CODE (orig) == CONST_INT) | |
896 | { | |
ed8908e7 | 897 | pic_ref = plus_constant (base, INTVAL (orig)); |
ee890fe2 SS |
898 | is_complex = 1; |
899 | } | |
900 | else | |
6f94a68e | 901 | pic_ref = gen_rtx_PLUS (Pmode, base, orig); |
ee890fe2 | 902 | |
ee890fe2 SS |
903 | if (reg && is_complex) |
904 | { | |
905 | emit_move_insn (reg, pic_ref); | |
906 | pic_ref = reg; | |
907 | } | |
908 | /* Likewise, should we set special REG_NOTEs here? */ | |
909 | } | |
910 | ||
911 | else if (GET_CODE (orig) == CONST) | |
912 | { | |
913 | return machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
914 | } | |
915 | ||
916 | else if (GET_CODE (orig) == MEM | |
917 | && GET_CODE (XEXP (orig, 0)) == SYMBOL_REF) | |
918 | { | |
919 | rtx addr = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
389fdba0 | 920 | addr = replace_equiv_address (orig, addr); |
ee890fe2 SS |
921 | emit_move_insn (reg, addr); |
922 | pic_ref = reg; | |
923 | } | |
924 | ||
925 | return pic_ref; | |
926 | } | |
927 | ||
11abc112 MM |
928 | /* Output the stub or non-lazy pointer in *SLOT, if it has been used. |
929 | DATA is the FILE* for assembly output. Called from | |
930 | htab_traverse. */ | |
ee890fe2 | 931 | |
11abc112 MM |
932 | static int |
933 | machopic_output_indirection (void **slot, void *data) | |
ee890fe2 | 934 | { |
11abc112 MM |
935 | machopic_indirection *p = *((machopic_indirection **) slot); |
936 | FILE *asm_out_file = (FILE *) data; | |
937 | rtx symbol; | |
938 | const char *sym_name; | |
939 | const char *ptr_name; | |
083cad55 | 940 | |
11abc112 MM |
941 | if (!p->used) |
942 | return 1; | |
ee890fe2 | 943 | |
11abc112 MM |
944 | symbol = p->symbol; |
945 | sym_name = XSTR (symbol, 0); | |
1adaa117 | 946 | ptr_name = p->ptr_name; |
083cad55 | 947 | |
11abc112 | 948 | if (p->stub_p) |
ee890fe2 | 949 | { |
ee890fe2 SS |
950 | char *sym; |
951 | char *stub; | |
0a6a4494 AO |
952 | tree id; |
953 | ||
954 | id = maybe_get_identifier (sym_name); | |
955 | if (id) | |
956 | { | |
957 | tree id_orig = id; | |
958 | ||
959 | while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
960 | id = TREE_CHAIN (id); | |
961 | if (id != id_orig) | |
962 | sym_name = IDENTIFIER_POINTER (id); | |
963 | } | |
ee890fe2 | 964 | |
ee890fe2 SS |
965 | sym = alloca (strlen (sym_name) + 2); |
966 | if (sym_name[0] == '*' || sym_name[0] == '&') | |
967 | strcpy (sym, sym_name + 1); | |
968 | else if (sym_name[0] == '-' || sym_name[0] == '+') | |
9c808aad | 969 | strcpy (sym, sym_name); |
ee890fe2 | 970 | else |
789a4ea3 | 971 | sprintf (sym, "%s%s", user_label_prefix, sym_name); |
ee890fe2 | 972 | |
11abc112 MM |
973 | stub = alloca (strlen (ptr_name) + 2); |
974 | if (ptr_name[0] == '*' || ptr_name[0] == '&') | |
975 | strcpy (stub, ptr_name + 1); | |
ee890fe2 | 976 | else |
11abc112 | 977 | sprintf (stub, "%s%s", user_label_prefix, ptr_name); |
ee890fe2 | 978 | |
ca472546 | 979 | machopic_output_stub (asm_out_file, sym, stub); |
ee890fe2 | 980 | } |
699c914a | 981 | else if (! indirect_data (symbol) |
156a126c MS |
982 | && (machopic_symbol_defined_p (symbol) |
983 | || SYMBOL_REF_LOCAL_P (symbol))) | |
ee890fe2 | 984 | { |
d6b5193b | 985 | switch_to_section (data_section); |
11abc112 MM |
986 | assemble_align (GET_MODE_ALIGNMENT (Pmode)); |
987 | assemble_label (ptr_name); | |
988 | assemble_integer (gen_rtx_SYMBOL_REF (Pmode, sym_name), | |
989 | GET_MODE_SIZE (Pmode), | |
990 | GET_MODE_ALIGNMENT (Pmode), 1); | |
ee890fe2 | 991 | } |
11abc112 MM |
992 | else |
993 | { | |
699c914a MS |
994 | rtx init = const0_rtx; |
995 | ||
56c779bc | 996 | switch_to_section (darwin_sections[machopic_nl_symbol_ptr_section]); |
11abc112 MM |
997 | assemble_name (asm_out_file, ptr_name); |
998 | fprintf (asm_out_file, ":\n"); | |
083cad55 | 999 | |
11abc112 MM |
1000 | fprintf (asm_out_file, "\t.indirect_symbol "); |
1001 | assemble_name (asm_out_file, sym_name); | |
1002 | fprintf (asm_out_file, "\n"); | |
083cad55 | 1003 | |
699c914a MS |
1004 | /* Variables that are marked with MACHO_SYMBOL_STATIC need to |
1005 | have their symbol name instead of 0 in the second entry of | |
1006 | the non-lazy symbol pointer data structure when they are | |
1007 | defined. This allows the runtime to rebind newer instances | |
1008 | of the translation unit with the original instance of the | |
d6ff8575 | 1009 | symbol. */ |
699c914a MS |
1010 | |
1011 | if ((SYMBOL_REF_FLAGS (symbol) & MACHO_SYMBOL_STATIC) | |
1012 | && machopic_symbol_defined_p (symbol)) | |
1013 | init = gen_rtx_SYMBOL_REF (Pmode, sym_name); | |
1014 | ||
1015 | assemble_integer (init, GET_MODE_SIZE (Pmode), | |
11abc112 MM |
1016 | GET_MODE_ALIGNMENT (Pmode), 1); |
1017 | } | |
083cad55 | 1018 | |
11abc112 MM |
1019 | return 1; |
1020 | } | |
1021 | ||
1022 | void | |
1023 | machopic_finish (FILE *asm_out_file) | |
1024 | { | |
1025 | if (machopic_indirections) | |
699c914a | 1026 | htab_traverse_noresize (machopic_indirections, |
11abc112 MM |
1027 | machopic_output_indirection, |
1028 | asm_out_file); | |
ee890fe2 SS |
1029 | } |
1030 | ||
9c808aad AJ |
1031 | int |
1032 | machopic_operand_p (rtx op) | |
ee890fe2 SS |
1033 | { |
1034 | if (MACHOPIC_JUST_INDIRECT) | |
1035 | { | |
1036 | while (GET_CODE (op) == CONST) | |
1037 | op = XEXP (op, 0); | |
1038 | ||
1039 | if (GET_CODE (op) == SYMBOL_REF) | |
11abc112 | 1040 | return machopic_symbol_defined_p (op); |
ee890fe2 SS |
1041 | else |
1042 | return 0; | |
1043 | } | |
1044 | ||
1045 | while (GET_CODE (op) == CONST) | |
1046 | op = XEXP (op, 0); | |
1047 | ||
1048 | if (GET_CODE (op) == MINUS | |
1049 | && GET_CODE (XEXP (op, 0)) == SYMBOL_REF | |
1050 | && GET_CODE (XEXP (op, 1)) == SYMBOL_REF | |
11abc112 MM |
1051 | && machopic_symbol_defined_p (XEXP (op, 0)) |
1052 | && machopic_symbol_defined_p (XEXP (op, 1))) | |
ee890fe2 SS |
1053 | return 1; |
1054 | ||
ee890fe2 SS |
1055 | return 0; |
1056 | } | |
df56a27f SS |
1057 | |
1058 | /* This function records whether a given name corresponds to a defined | |
1059 | or undefined function or variable, for machopic_classify_ident to | |
1060 | use later. */ | |
1061 | ||
1062 | void | |
9c808aad | 1063 | darwin_encode_section_info (tree decl, rtx rtl, int first ATTRIBUTE_UNUSED) |
df56a27f | 1064 | { |
353e51f8 | 1065 | rtx sym_ref; |
df56a27f | 1066 | |
e1a4211d SS |
1067 | /* Do the standard encoding things first. */ |
1068 | default_encode_section_info (decl, rtl, first); | |
1069 | ||
11abc112 MM |
1070 | if (TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL) |
1071 | return; | |
e1a4211d | 1072 | |
11abc112 MM |
1073 | sym_ref = XEXP (rtl, 0); |
1074 | if (TREE_CODE (decl) == VAR_DECL) | |
1075 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_VARIABLE; | |
1076 | ||
1077 | if (!DECL_EXTERNAL (decl) | |
f1a66265 | 1078 | && (!TREE_PUBLIC (decl) || !DECL_WEAK (decl)) |
a9b0b825 | 1079 | && ! lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)) |
df56a27f SS |
1080 | && ((TREE_STATIC (decl) |
1081 | && (!DECL_COMMON (decl) || !TREE_PUBLIC (decl))) | |
bfbdca0b | 1082 | || (!DECL_COMMON (decl) && DECL_INITIAL (decl) |
abe72dd8 | 1083 | && DECL_INITIAL (decl) != error_mark_node))) |
11abc112 | 1084 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; |
699c914a | 1085 | |
d6ff8575 | 1086 | if (! TREE_PUBLIC (decl)) |
699c914a | 1087 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_STATIC; |
4e08ba6c | 1088 | } |
2cc07db4 | 1089 | |
8e3e233b DP |
1090 | void |
1091 | darwin_mark_decl_preserved (const char *name) | |
1092 | { | |
1093 | fprintf (asm_out_file, ".no_dead_strip "); | |
1094 | assemble_name (asm_out_file, name); | |
1095 | fputc ('\n', asm_out_file); | |
1096 | } | |
1097 | ||
d6b5193b | 1098 | section * |
9c808aad AJ |
1099 | machopic_select_section (tree exp, int reloc, |
1100 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
ae46c4e0 | 1101 | { |
d6b5193b | 1102 | section *base_section; |
0f9bc2d6 GK |
1103 | bool weak_p = (DECL_P (exp) && DECL_WEAK (exp) |
1104 | && (lookup_attribute ("weak", DECL_ATTRIBUTES (exp)) | |
1105 | || ! lookup_attribute ("weak_import", | |
1106 | DECL_ATTRIBUTES (exp)))); | |
d6b5193b | 1107 | |
f1a66265 | 1108 | if (TREE_CODE (exp) == FUNCTION_DECL) |
d6b5193b | 1109 | { |
c543ca49 | 1110 | if (reloc == 1) |
d6b5193b | 1111 | base_section = (weak_p |
56c779bc | 1112 | ? darwin_sections[text_unlikely_coal_section] |
d6b5193b RS |
1113 | : unlikely_text_section ()); |
1114 | else | |
62baeb4f EC |
1115 | base_section = weak_p ? darwin_sections[text_coal_section] |
1116 | : text_section; | |
d6b5193b | 1117 | } |
f1a66265 | 1118 | else if (decl_readonly_section_1 (exp, reloc, MACHOPIC_INDIRECT)) |
62baeb4f EC |
1119 | base_section = weak_p ? darwin_sections[const_coal_section] |
1120 | : darwin_sections[const_section]; | |
3d7964d5 | 1121 | else if (TREE_READONLY (exp) || TREE_CONSTANT (exp)) |
62baeb4f EC |
1122 | base_section = weak_p ? darwin_sections[const_data_coal_section] |
1123 | : darwin_sections[const_data_section]; | |
3d7964d5 | 1124 | else |
56c779bc | 1125 | base_section = weak_p ? darwin_sections[data_coal_section] : data_section; |
9c808aad | 1126 | |
3d7964d5 | 1127 | if (TREE_CODE (exp) == STRING_CST |
9c808aad | 1128 | && ((size_t) TREE_STRING_LENGTH (exp) |
3521b33c | 1129 | == strlen (TREE_STRING_POINTER (exp)) + 1)) |
56c779bc | 1130 | return darwin_sections[cstring_section]; |
3d7964d5 GK |
1131 | else if ((TREE_CODE (exp) == INTEGER_CST || TREE_CODE (exp) == REAL_CST) |
1132 | && flag_merge_constants) | |
ae46c4e0 | 1133 | { |
e1e04267 | 1134 | tree size = TYPE_SIZE_UNIT (TREE_TYPE (exp)); |
ae46c4e0 RH |
1135 | |
1136 | if (TREE_CODE (size) == INTEGER_CST && | |
1137 | TREE_INT_CST_LOW (size) == 4 && | |
1138 | TREE_INT_CST_HIGH (size) == 0) | |
56c779bc | 1139 | return darwin_sections[literal4_section]; |
ae46c4e0 RH |
1140 | else if (TREE_CODE (size) == INTEGER_CST && |
1141 | TREE_INT_CST_LOW (size) == 8 && | |
1142 | TREE_INT_CST_HIGH (size) == 0) | |
56c779bc | 1143 | return darwin_sections[literal8_section]; |
f7288899 EC |
1144 | else if (TARGET_64BIT |
1145 | && TREE_CODE (size) == INTEGER_CST | |
1146 | && TREE_INT_CST_LOW (size) == 16 | |
1147 | && TREE_INT_CST_HIGH (size) == 0) | |
1148 | return darwin_sections[literal16_section]; | |
ae46c4e0 | 1149 | else |
d6b5193b | 1150 | return base_section; |
ae46c4e0 RH |
1151 | } |
1152 | else if (TREE_CODE (exp) == CONSTRUCTOR | |
1153 | && TREE_TYPE (exp) | |
1154 | && TREE_CODE (TREE_TYPE (exp)) == RECORD_TYPE | |
1155 | && TYPE_NAME (TREE_TYPE (exp))) | |
1156 | { | |
1157 | tree name = TYPE_NAME (TREE_TYPE (exp)); | |
1158 | if (TREE_CODE (name) == TYPE_DECL) | |
1159 | name = DECL_NAME (name); | |
c64de75f ZL |
1160 | |
1161 | if (!strcmp (IDENTIFIER_POINTER (name), "__builtin_ObjCString")) | |
1162 | { | |
1163 | if (flag_next_runtime) | |
56c779bc | 1164 | return darwin_sections[objc_constant_string_object_section]; |
c64de75f | 1165 | else |
56c779bc | 1166 | return darwin_sections[objc_string_object_section]; |
c64de75f | 1167 | } |
ae46c4e0 | 1168 | else |
d6b5193b | 1169 | return base_section; |
ae46c4e0 RH |
1170 | } |
1171 | else if (TREE_CODE (exp) == VAR_DECL && | |
1172 | DECL_NAME (exp) && | |
1173 | TREE_CODE (DECL_NAME (exp)) == IDENTIFIER_NODE && | |
1174 | IDENTIFIER_POINTER (DECL_NAME (exp)) && | |
1175 | !strncmp (IDENTIFIER_POINTER (DECL_NAME (exp)), "_OBJC_", 6)) | |
1176 | { | |
1177 | const char *name = IDENTIFIER_POINTER (DECL_NAME (exp)); | |
1178 | ||
1179 | if (!strncmp (name, "_OBJC_CLASS_METHODS_", 20)) | |
56c779bc | 1180 | return darwin_sections[objc_cls_meth_section]; |
ae46c4e0 | 1181 | else if (!strncmp (name, "_OBJC_INSTANCE_METHODS_", 23)) |
56c779bc | 1182 | return darwin_sections[objc_inst_meth_section]; |
ae46c4e0 | 1183 | else if (!strncmp (name, "_OBJC_CATEGORY_CLASS_METHODS_", 20)) |
56c779bc | 1184 | return darwin_sections[objc_cat_cls_meth_section]; |
ae46c4e0 | 1185 | else if (!strncmp (name, "_OBJC_CATEGORY_INSTANCE_METHODS_", 23)) |
56c779bc | 1186 | return darwin_sections[objc_cat_inst_meth_section]; |
ae46c4e0 | 1187 | else if (!strncmp (name, "_OBJC_CLASS_VARIABLES_", 22)) |
56c779bc | 1188 | return darwin_sections[objc_class_vars_section]; |
ae46c4e0 | 1189 | else if (!strncmp (name, "_OBJC_INSTANCE_VARIABLES_", 25)) |
56c779bc | 1190 | return darwin_sections[objc_instance_vars_section]; |
ae46c4e0 | 1191 | else if (!strncmp (name, "_OBJC_CLASS_PROTOCOLS_", 22)) |
56c779bc | 1192 | return darwin_sections[objc_cat_cls_meth_section]; |
ae46c4e0 | 1193 | else if (!strncmp (name, "_OBJC_CLASS_NAME_", 17)) |
56c779bc | 1194 | return darwin_sections[objc_class_names_section]; |
ae46c4e0 | 1195 | else if (!strncmp (name, "_OBJC_METH_VAR_NAME_", 20)) |
56c779bc | 1196 | return darwin_sections[objc_meth_var_names_section]; |
ae46c4e0 | 1197 | else if (!strncmp (name, "_OBJC_METH_VAR_TYPE_", 20)) |
56c779bc | 1198 | return darwin_sections[objc_meth_var_types_section]; |
ae46c4e0 | 1199 | else if (!strncmp (name, "_OBJC_CLASS_REFERENCES", 22)) |
56c779bc | 1200 | return darwin_sections[objc_cls_refs_section]; |
ae46c4e0 | 1201 | else if (!strncmp (name, "_OBJC_CLASS_", 12)) |
56c779bc | 1202 | return darwin_sections[objc_class_section]; |
ae46c4e0 | 1203 | else if (!strncmp (name, "_OBJC_METACLASS_", 16)) |
56c779bc | 1204 | return darwin_sections[objc_meta_class_section]; |
ae46c4e0 | 1205 | else if (!strncmp (name, "_OBJC_CATEGORY_", 15)) |
56c779bc | 1206 | return darwin_sections[objc_category_section]; |
ae46c4e0 | 1207 | else if (!strncmp (name, "_OBJC_SELECTOR_REFERENCES", 25)) |
56c779bc | 1208 | return darwin_sections[objc_selector_refs_section]; |
ae46c4e0 | 1209 | else if (!strncmp (name, "_OBJC_SELECTOR_FIXUP", 20)) |
56c779bc | 1210 | return darwin_sections[objc_selector_fixup_section]; |
ae46c4e0 | 1211 | else if (!strncmp (name, "_OBJC_SYMBOLS", 13)) |
56c779bc | 1212 | return darwin_sections[objc_symbols_section]; |
ae46c4e0 | 1213 | else if (!strncmp (name, "_OBJC_MODULES", 13)) |
56c779bc | 1214 | return darwin_sections[objc_module_info_section]; |
264fa2db | 1215 | else if (!strncmp (name, "_OBJC_IMAGE_INFO", 16)) |
56c779bc | 1216 | return darwin_sections[objc_image_info_section]; |
ae46c4e0 | 1217 | else if (!strncmp (name, "_OBJC_PROTOCOL_INSTANCE_METHODS_", 32)) |
56c779bc | 1218 | return darwin_sections[objc_cat_inst_meth_section]; |
ae46c4e0 | 1219 | else if (!strncmp (name, "_OBJC_PROTOCOL_CLASS_METHODS_", 29)) |
56c779bc | 1220 | return darwin_sections[objc_cat_cls_meth_section]; |
ae46c4e0 | 1221 | else if (!strncmp (name, "_OBJC_PROTOCOL_REFS_", 20)) |
56c779bc | 1222 | return darwin_sections[objc_cat_cls_meth_section]; |
ae46c4e0 | 1223 | else if (!strncmp (name, "_OBJC_PROTOCOL_", 15)) |
56c779bc | 1224 | return darwin_sections[objc_protocol_section]; |
ae46c4e0 | 1225 | else |
d6b5193b | 1226 | return base_section; |
ae46c4e0 RH |
1227 | } |
1228 | else | |
d6b5193b | 1229 | return base_section; |
ae46c4e0 RH |
1230 | } |
1231 | ||
b64a1b53 | 1232 | /* This can be called with address expressions as "rtx". |
991b6592 | 1233 | They must go in "const". */ |
b64a1b53 | 1234 | |
d6b5193b | 1235 | section * |
9c808aad AJ |
1236 | machopic_select_rtx_section (enum machine_mode mode, rtx x, |
1237 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
b64a1b53 | 1238 | { |
b79d4265 SS |
1239 | if (GET_MODE_SIZE (mode) == 8 |
1240 | && (GET_CODE (x) == CONST_INT | |
1241 | || GET_CODE (x) == CONST_DOUBLE)) | |
56c779bc | 1242 | return darwin_sections[literal8_section]; |
b64a1b53 RH |
1243 | else if (GET_MODE_SIZE (mode) == 4 |
1244 | && (GET_CODE (x) == CONST_INT | |
1245 | || GET_CODE (x) == CONST_DOUBLE)) | |
56c779bc | 1246 | return darwin_sections[literal4_section]; |
1be1e2dd EC |
1247 | else if (TARGET_64BIT |
1248 | && GET_MODE_SIZE (mode) == 16 | |
f7288899 | 1249 | && (GET_CODE (x) == CONST_INT |
ca6f2eef EC |
1250 | || GET_CODE (x) == CONST_DOUBLE |
1251 | || GET_CODE (x) == CONST_VECTOR)) | |
f7288899 | 1252 | return darwin_sections[literal16_section]; |
86b0a4f3 | 1253 | else if (MACHOPIC_INDIRECT |
2e53734e GK |
1254 | && (GET_CODE (x) == SYMBOL_REF |
1255 | || GET_CODE (x) == CONST | |
1256 | || GET_CODE (x) == LABEL_REF)) | |
56c779bc | 1257 | return darwin_sections[const_data_section]; |
b64a1b53 | 1258 | else |
56c779bc | 1259 | return darwin_sections[const_section]; |
b64a1b53 RH |
1260 | } |
1261 | ||
2cc07db4 | 1262 | void |
9c808aad | 1263 | machopic_asm_out_constructor (rtx symbol, int priority ATTRIBUTE_UNUSED) |
2cc07db4 | 1264 | { |
ab82a49f | 1265 | if (MACHOPIC_INDIRECT) |
56c779bc | 1266 | switch_to_section (darwin_sections[mod_init_section]); |
2cc07db4 | 1267 | else |
56c779bc | 1268 | switch_to_section (darwin_sections[constructor_section]); |
c8af3574 RH |
1269 | assemble_align (POINTER_SIZE); |
1270 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
2cc07db4 | 1271 | |
ab82a49f | 1272 | if (! MACHOPIC_INDIRECT) |
2cc07db4 RH |
1273 | fprintf (asm_out_file, ".reference .constructors_used\n"); |
1274 | } | |
1275 | ||
1276 | void | |
9c808aad | 1277 | machopic_asm_out_destructor (rtx symbol, int priority ATTRIBUTE_UNUSED) |
2cc07db4 | 1278 | { |
ab82a49f | 1279 | if (MACHOPIC_INDIRECT) |
56c779bc | 1280 | switch_to_section (darwin_sections[mod_term_section]); |
2cc07db4 | 1281 | else |
56c779bc | 1282 | switch_to_section (darwin_sections[destructor_section]); |
c8af3574 RH |
1283 | assemble_align (POINTER_SIZE); |
1284 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
2cc07db4 | 1285 | |
ab82a49f | 1286 | if (! MACHOPIC_INDIRECT) |
2cc07db4 RH |
1287 | fprintf (asm_out_file, ".reference .destructors_used\n"); |
1288 | } | |
e2500fed | 1289 | |
5eb99654 | 1290 | void |
9c808aad | 1291 | darwin_globalize_label (FILE *stream, const char *name) |
5eb99654 KG |
1292 | { |
1293 | if (!!strncmp (name, "_OBJC_", 6)) | |
1294 | default_globalize_label (stream, name); | |
1295 | } | |
1296 | ||
4746cf84 | 1297 | void |
083cad55 | 1298 | darwin_asm_named_section (const char *name, |
c18a5b6c MM |
1299 | unsigned int flags ATTRIBUTE_UNUSED, |
1300 | tree decl ATTRIBUTE_UNUSED) | |
4746cf84 | 1301 | { |
f1a66265 | 1302 | fprintf (asm_out_file, "\t.section %s\n", name); |
4746cf84 MA |
1303 | } |
1304 | ||
083cad55 | 1305 | void |
f1a66265 | 1306 | darwin_unique_section (tree decl ATTRIBUTE_UNUSED, int reloc ATTRIBUTE_UNUSED) |
4746cf84 | 1307 | { |
f1a66265 | 1308 | /* Darwin does not use unique sections. */ |
4746cf84 MA |
1309 | } |
1310 | ||
f475fd3c MS |
1311 | /* Handle __attribute__ ((apple_kext_compatibility)). |
1312 | This only applies to darwin kexts for 2.95 compatibility -- it shrinks the | |
1313 | vtable for classes with this attribute (and their descendants) by not | |
1314 | outputting the new 3.0 nondeleting destructor. This means that such | |
1315 | objects CANNOT be allocated on the stack or as globals UNLESS they have | |
1316 | a completely empty `operator delete'. | |
1317 | Luckily, this fits in with the Darwin kext model. | |
1318 | ||
1319 | This attribute also disables gcc3's potential overlaying of derived | |
1320 | class data members on the padding at the end of the base class. */ | |
1321 | ||
1322 | tree | |
1323 | darwin_handle_kext_attribute (tree *node, tree name, | |
1324 | tree args ATTRIBUTE_UNUSED, | |
1325 | int flags ATTRIBUTE_UNUSED, | |
1326 | bool *no_add_attrs) | |
1327 | { | |
1328 | /* APPLE KEXT stuff -- only applies with pure static C++ code. */ | |
1329 | if (! TARGET_KEXTABI) | |
1330 | { | |
1331 | warning (0, "%<%s%> 2.95 vtable-compatability attribute applies " | |
1332 | "only when compiling a kext", IDENTIFIER_POINTER (name)); | |
1333 | ||
1334 | *no_add_attrs = true; | |
1335 | } | |
1336 | else if (TREE_CODE (*node) != RECORD_TYPE) | |
1337 | { | |
1338 | warning (0, "%<%s%> 2.95 vtable-compatability attribute applies " | |
1339 | "only to C++ classes", IDENTIFIER_POINTER (name)); | |
1340 | ||
1341 | *no_add_attrs = true; | |
1342 | } | |
1343 | ||
1344 | return NULL_TREE; | |
1345 | } | |
1346 | ||
005c1a13 GK |
1347 | /* Handle a "weak_import" attribute; arguments as in |
1348 | struct attribute_spec.handler. */ | |
1349 | ||
1350 | tree | |
1351 | darwin_handle_weak_import_attribute (tree *node, tree name, | |
1352 | tree ARG_UNUSED (args), | |
1353 | int ARG_UNUSED (flags), | |
1354 | bool * no_add_attrs) | |
1355 | { | |
d7001ae5 | 1356 | if (TREE_CODE (*node) != FUNCTION_DECL && TREE_CODE (*node) != VAR_DECL) |
005c1a13 | 1357 | { |
5c498b10 DD |
1358 | warning (OPT_Wattributes, "%qs attribute ignored", |
1359 | IDENTIFIER_POINTER (name)); | |
005c1a13 GK |
1360 | *no_add_attrs = true; |
1361 | } | |
1362 | else | |
1363 | declare_weak (*node); | |
1364 | ||
1365 | return NULL_TREE; | |
1366 | } | |
45cc4783 MS |
1367 | |
1368 | static void | |
1369 | no_dead_strip (FILE *file, const char *lab) | |
1370 | { | |
005c1a13 | 1371 | fprintf (file, ".no_dead_strip %s\n", lab); |
45cc4783 MS |
1372 | } |
1373 | ||
083cad55 | 1374 | /* Emit a label for an FDE, making it global and/or weak if appropriate. |
eeab4d81 MS |
1375 | The third parameter is nonzero if this is for exception handling. |
1376 | The fourth parameter is nonzero if this is just a placeholder for an | |
4746cf84 | 1377 | FDE that we are omitting. */ |
eeab4d81 | 1378 | |
083cad55 | 1379 | void |
eeab4d81 | 1380 | darwin_emit_unwind_label (FILE *file, tree decl, int for_eh, int empty) |
4746cf84 | 1381 | { |
44ef77c1 EC |
1382 | const char *base; |
1383 | char *lab; | |
1384 | bool need_quotes; | |
4746cf84 | 1385 | |
44ef77c1 EC |
1386 | if (DECL_ASSEMBLER_NAME_SET_P (decl)) |
1387 | base = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); | |
1388 | else | |
1389 | base = IDENTIFIER_POINTER (DECL_NAME (decl)); | |
4746cf84 | 1390 | |
44ef77c1 EC |
1391 | base = targetm.strip_name_encoding (base); |
1392 | need_quotes = name_needs_quotes (base); | |
eeab4d81 MS |
1393 | |
1394 | if (! for_eh) | |
192d0f89 | 1395 | return; |
4746cf84 | 1396 | |
192d0f89 GK |
1397 | lab = concat (need_quotes ? "\"" : "", user_label_prefix, base, ".eh", |
1398 | need_quotes ? "\"" : "", NULL); | |
4746cf84 MA |
1399 | |
1400 | if (TREE_PUBLIC (decl)) | |
f1a66265 | 1401 | fprintf (file, "\t%s %s\n", |
4746cf84 MA |
1402 | (DECL_VISIBILITY (decl) != VISIBILITY_HIDDEN |
1403 | ? ".globl" | |
1404 | : ".private_extern"), | |
1405 | lab); | |
1406 | ||
f1a66265 GK |
1407 | if (DECL_WEAK (decl)) |
1408 | fprintf (file, "\t.weak_definition %s\n", lab); | |
4746cf84 MA |
1409 | |
1410 | if (empty) | |
45cc4783 MS |
1411 | { |
1412 | fprintf (file, "%s = 0\n", lab); | |
1413 | ||
1414 | /* Mark the absolute .eh and .eh1 style labels as needed to | |
1415 | ensure that we don't dead code strip them and keep such | |
1416 | labels from another instantiation point until we can fix this | |
1417 | properly with group comdat support. */ | |
1418 | no_dead_strip (file, lab); | |
1419 | } | |
4746cf84 MA |
1420 | else |
1421 | fprintf (file, "%s:\n", lab); | |
1422 | ||
1423 | free (lab); | |
1424 | } | |
1425 | ||
083cad55 EC |
1426 | static GTY(()) unsigned long except_table_label_num; |
1427 | ||
1428 | void | |
1429 | darwin_emit_except_table_label (FILE *file) | |
1430 | { | |
1431 | char section_start_label[30]; | |
1432 | ||
1433 | ASM_GENERATE_INTERNAL_LABEL (section_start_label, "GCC_except_table", | |
1434 | except_table_label_num++); | |
1435 | ASM_OUTPUT_LABEL (file, section_start_label); | |
1436 | } | |
1437 | /* Generate a PC-relative reference to a Mach-O non-lazy-symbol. */ | |
eeab4d81 | 1438 | |
4746cf84 MA |
1439 | void |
1440 | darwin_non_lazy_pcrel (FILE *file, rtx addr) | |
1441 | { | |
4746cf84 MA |
1442 | const char *nlp_name; |
1443 | ||
992d08b1 | 1444 | gcc_assert (GET_CODE (addr) == SYMBOL_REF); |
4746cf84 | 1445 | |
11abc112 | 1446 | nlp_name = machopic_indirection_name (addr, /*stub_p=*/false); |
4746cf84 MA |
1447 | fputs ("\t.long\t", file); |
1448 | ASM_OUTPUT_LABELREF (file, nlp_name); | |
1449 | fputs ("-.", file); | |
1450 | } | |
1451 | ||
6ce4806b MA |
1452 | /* Emit an assembler directive to set visibility for a symbol. The |
1453 | only supported visibilities are VISIBILITY_DEFAULT and | |
1454 | VISIBILITY_HIDDEN; the latter corresponds to Darwin's "private | |
1455 | extern". There is no MACH-O equivalent of ELF's | |
1456 | VISIBILITY_INTERNAL or VISIBILITY_PROTECTED. */ | |
1457 | ||
083cad55 | 1458 | void |
6ce4806b MA |
1459 | darwin_assemble_visibility (tree decl, int vis) |
1460 | { | |
1461 | if (vis == VISIBILITY_DEFAULT) | |
1462 | ; | |
1463 | else if (vis == VISIBILITY_HIDDEN) | |
1464 | { | |
1465 | fputs ("\t.private_extern ", asm_out_file); | |
1466 | assemble_name (asm_out_file, | |
1467 | (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)))); | |
1468 | fputs ("\n", asm_out_file); | |
1469 | } | |
1470 | else | |
5c498b10 DD |
1471 | warning (OPT_Wattributes, "internal and protected visibility attributes " |
1472 | "not supported in this configuration; ignored"); | |
6ce4806b MA |
1473 | } |
1474 | ||
7606e68f SS |
1475 | /* Output a difference of two labels that will be an assembly time |
1476 | constant if the two labels are local. (.long lab1-lab2 will be | |
1477 | very different if lab1 is at the boundary between two sections; it | |
1478 | will be relocated according to the second section, not the first, | |
1479 | so one ends up with a difference between labels in different | |
1480 | sections, which is bad in the dwarf2 eh context for instance.) */ | |
1481 | ||
1482 | static int darwin_dwarf_label_counter; | |
1483 | ||
1484 | void | |
59d8fe27 | 1485 | darwin_asm_output_dwarf_delta (FILE *file, int size, |
9c808aad | 1486 | const char *lab1, const char *lab2) |
7606e68f | 1487 | { |
4746cf84 MA |
1488 | int islocaldiff = (lab1[0] == '*' && lab1[1] == 'L' |
1489 | && lab2[0] == '*' && lab2[1] == 'L'); | |
d4b56511 | 1490 | const char *directive = (size == 8 ? ".quad" : ".long"); |
7606e68f SS |
1491 | |
1492 | if (islocaldiff) | |
1493 | fprintf (file, "\t.set L$set$%d,", darwin_dwarf_label_counter); | |
1494 | else | |
59d8fe27 | 1495 | fprintf (file, "\t%s\t", directive); |
57829bc4 | 1496 | assemble_name_raw (file, lab1); |
7606e68f | 1497 | fprintf (file, "-"); |
57829bc4 | 1498 | assemble_name_raw (file, lab2); |
7606e68f | 1499 | if (islocaldiff) |
59d8fe27 | 1500 | fprintf (file, "\n\t%s L$set$%d", directive, darwin_dwarf_label_counter++); |
7606e68f | 1501 | } |
192d0f89 GK |
1502 | |
1503 | /* Output labels for the start of the DWARF sections if necessary. */ | |
1504 | void | |
1505 | darwin_file_start (void) | |
1506 | { | |
1507 | if (write_symbols == DWARF2_DEBUG) | |
1508 | { | |
4f8bdef9 | 1509 | static const char * const debugnames[] = |
192d0f89 GK |
1510 | { |
1511 | DEBUG_FRAME_SECTION, | |
1512 | DEBUG_INFO_SECTION, | |
1513 | DEBUG_ABBREV_SECTION, | |
1514 | DEBUG_ARANGES_SECTION, | |
1515 | DEBUG_MACINFO_SECTION, | |
1516 | DEBUG_LINE_SECTION, | |
1517 | DEBUG_LOC_SECTION, | |
1518 | DEBUG_PUBNAMES_SECTION, | |
89708594 | 1519 | DEBUG_PUBTYPES_SECTION, |
192d0f89 GK |
1520 | DEBUG_STR_SECTION, |
1521 | DEBUG_RANGES_SECTION | |
1522 | }; | |
1523 | size_t i; | |
1524 | ||
1525 | for (i = 0; i < ARRAY_SIZE (debugnames); i++) | |
1526 | { | |
1527 | int namelen; | |
1528 | ||
1529 | switch_to_section (get_section (debugnames[i], SECTION_DEBUG, NULL)); | |
4f8bdef9 | 1530 | |
192d0f89 GK |
1531 | gcc_assert (strncmp (debugnames[i], "__DWARF,", 8) == 0); |
1532 | gcc_assert (strchr (debugnames[i] + 8, ',')); | |
4f8bdef9 | 1533 | |
192d0f89 GK |
1534 | namelen = strchr (debugnames[i] + 8, ',') - (debugnames[i] + 8); |
1535 | fprintf (asm_out_file, "Lsection%.*s:\n", namelen, debugnames[i] + 8); | |
1536 | } | |
1537 | } | |
1538 | } | |
1539 | ||
1540 | /* Output an offset in a DWARF section on Darwin. On Darwin, DWARF section | |
1541 | offsets are not represented using relocs in .o files; either the | |
1542 | section never leaves the .o file, or the linker or other tool is | |
1543 | responsible for parsing the DWARF and updating the offsets. */ | |
1544 | ||
1545 | void | |
1546 | darwin_asm_output_dwarf_offset (FILE *file, int size, const char * lab, | |
1547 | section *base) | |
1548 | { | |
1549 | char sname[64]; | |
1550 | int namelen; | |
4f8bdef9 | 1551 | |
192d0f89 GK |
1552 | gcc_assert (base->common.flags & SECTION_NAMED); |
1553 | gcc_assert (strncmp (base->named.name, "__DWARF,", 8) == 0); | |
1554 | gcc_assert (strchr (base->named.name + 8, ',')); | |
1555 | ||
1556 | namelen = strchr (base->named.name + 8, ',') - (base->named.name + 8); | |
1557 | sprintf (sname, "*Lsection%.*s", namelen, base->named.name + 8); | |
1558 | darwin_asm_output_dwarf_delta (file, size, lab, sname); | |
1559 | } | |
7606e68f | 1560 | |
a5fe455b | 1561 | void |
9c808aad | 1562 | darwin_file_end (void) |
a5fe455b ZW |
1563 | { |
1564 | machopic_finish (asm_out_file); | |
1565 | if (strcmp (lang_hooks.name, "GNU C++") == 0) | |
1566 | { | |
56c779bc GK |
1567 | switch_to_section (darwin_sections[constructor_section]); |
1568 | switch_to_section (darwin_sections[destructor_section]); | |
a5fe455b ZW |
1569 | ASM_OUTPUT_ALIGN (asm_out_file, 1); |
1570 | } | |
92b9a671 | 1571 | fprintf (asm_out_file, "\t.subsections_via_symbols\n"); |
a5fe455b ZW |
1572 | } |
1573 | ||
f475fd3c MS |
1574 | /* TODO: Add a language hook for identifying if a decl is a vtable. */ |
1575 | #define DARWIN_VTABLE_P(DECL) 0 | |
1576 | ||
31920d83 | 1577 | /* Cross-module name binding. Darwin does not support overriding |
f475fd3c | 1578 | functions at dynamic-link time, except for vtables in kexts. */ |
31920d83 DJ |
1579 | |
1580 | bool | |
1581 | darwin_binds_local_p (tree decl) | |
1582 | { | |
f475fd3c MS |
1583 | return default_binds_local_p_1 (decl, |
1584 | TARGET_KEXTABI && DARWIN_VTABLE_P (decl)); | |
31920d83 DJ |
1585 | } |
1586 | ||
23f99493 MS |
1587 | #if 0 |
1588 | /* See TARGET_ASM_OUTPUT_ANCHOR for why we can't do this yet. */ | |
ab0ff804 AP |
1589 | /* The Darwin's implementation of TARGET_ASM_OUTPUT_ANCHOR. Define the |
1590 | anchor relative to ".", the current section position. We cannot use | |
1591 | the default one because ASM_OUTPUT_DEF is wrong for Darwin. */ | |
1592 | ||
1593 | void | |
1594 | darwin_asm_output_anchor (rtx symbol) | |
1595 | { | |
1596 | fprintf (asm_out_file, "\t.set\t"); | |
1597 | assemble_name (asm_out_file, XSTR (symbol, 0)); | |
1598 | fprintf (asm_out_file, ", . + " HOST_WIDE_INT_PRINT_DEC "\n", | |
1599 | SYMBOL_REF_BLOCK_OFFSET (symbol)); | |
1600 | } | |
23f99493 | 1601 | #endif |
ab0ff804 | 1602 | |
4f8bdef9 EC |
1603 | /* Set the darwin specific attributes on TYPE. */ |
1604 | void | |
1605 | darwin_set_default_type_attributes (tree type) | |
1606 | { | |
1607 | if (darwin_ms_struct | |
1608 | && TREE_CODE (type) == RECORD_TYPE) | |
1609 | TYPE_ATTRIBUTES (type) = tree_cons (get_identifier ("ms_struct"), | |
1610 | NULL_TREE, | |
1611 | TYPE_ATTRIBUTES (type)); | |
1612 | } | |
1613 | ||
3a057207 | 1614 | /* True, iff we're generating code for loadable kernel extensions. */ |
f475fd3c MS |
1615 | |
1616 | bool | |
1617 | darwin_kextabi_p (void) { | |
1618 | return flag_apple_kext; | |
1619 | } | |
1620 | ||
1621 | void | |
1622 | darwin_override_options (void) | |
1623 | { | |
1624 | if (flag_apple_kext && strcmp (lang_hooks.name, "GNU C++") != 0) | |
1625 | { | |
1626 | warning (0, "command line option %<-fapple-kext%> is only valid for C++"); | |
1627 | flag_apple_kext = 0; | |
1628 | } | |
1629 | if (flag_mkernel || flag_apple_kext) | |
1630 | { | |
1631 | /* -mkernel implies -fapple-kext for C++ */ | |
1632 | if (strcmp (lang_hooks.name, "GNU C++") == 0) | |
1633 | flag_apple_kext = 1; | |
1634 | ||
1635 | flag_no_common = 1; | |
1636 | ||
1637 | /* No EH in kexts. */ | |
1638 | flag_exceptions = 0; | |
1639 | /* No -fnon-call-exceptions data in kexts. */ | |
1640 | flag_non_call_exceptions = 0; | |
1641 | } | |
1642 | } | |
1643 | ||
e2500fed | 1644 | #include "gt-darwin.h" |