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80d725d7 | 1 | /* Functions for generic Darwin as target machine for GNU C compiler. |
2be1b07e | 2 | Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004, |
3 | 2005 | |
80d725d7 | 4 | Free Software Foundation, Inc. |
5 | Contributed by Apple Computer Inc. | |
6 | ||
187b36cf | 7 | This file is part of GCC. |
80d725d7 | 8 | |
187b36cf | 9 | GCC is free software; you can redistribute it and/or modify |
80d725d7 | 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 | ||
187b36cf | 14 | GCC is distributed in the hope that it will be useful, |
80d725d7 | 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 | |
187b36cf | 20 | along with GCC; see the file COPYING. If not, write to |
dbddc6c4 | 21 | the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
22 | Boston, MA 02110-1301, USA. */ | |
80d725d7 | 23 | |
24 | #include "config.h" | |
25 | #include "system.h" | |
805e22b2 | 26 | #include "coretypes.h" |
27 | #include "tm.h" | |
80d725d7 | 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" | |
80d725d7 | 41 | #include "function.h" |
42 | #include "ggc.h" | |
d19bd1f0 | 43 | #include "langhooks.h" |
6d3abfc0 | 44 | #include "target.h" |
79e2a0ca | 45 | #include "tm_p.h" |
690abe5d | 46 | #include "toplev.h" |
ab06d2ff | 47 | #include "hashtab.h" |
80d725d7 | 48 | |
f0ed0e8a | 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 | |
cb4213cd | 56 | translation unit with versions of those functions and methods |
f0ed0e8a | 57 | from the newly compiled translation unit. The new functions access |
d188633a | 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. | |
f0ed0e8a | 61 | |
8063e558 | 62 | The changes are to insert 5 nops at the beginning of all functions |
d188633a | 63 | and to use indirection to get at static symbols. The 5 nops |
f0ed0e8a | 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, | |
84cbcde5 | 67 | including existing function pointers and virtual methods. See |
f0ed0e8a | 68 | rs6000_emit_prologue for the code that handles the nop insertions. |
b215c058 | 69 | |
f0ed0e8a | 70 | The added indirection allows gdb to redirect accesses to static |
d188633a | 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. */ | |
f0ed0e8a | 78 | |
92e4ba7d | 79 | /* Section names. */ |
80 | section * darwin_sections[NUM_DARWIN_SECTIONS]; | |
2f14b1f9 | 81 | |
82 | /* A get_unnamed_section callback used to switch to an ObjC section. | |
83 | DIRECTIVE is as for output_section_asm_op. */ | |
84 | ||
85 | static void | |
86 | output_objc_section_asm_op (const void *directive) | |
87 | { | |
92e4ba7d | 88 | static bool been_here = false; |
2f14b1f9 | 89 | |
92e4ba7d | 90 | if (! been_here) |
2f14b1f9 | 91 | { |
b215c058 | 92 | static const enum darwin_section_enum tomark[] = |
92e4ba7d | 93 | { |
94 | /* written, cold -> hot */ | |
95 | objc_cat_cls_meth_section, | |
96 | objc_cat_inst_meth_section, | |
97 | objc_string_object_section, | |
98 | objc_constant_string_object_section, | |
99 | objc_selector_refs_section, | |
100 | objc_selector_fixup_section, | |
101 | objc_cls_refs_section, | |
102 | objc_class_section, | |
103 | objc_meta_class_section, | |
104 | /* shared, hot -> cold */ | |
105 | objc_cls_meth_section, | |
106 | objc_inst_meth_section, | |
107 | objc_protocol_section, | |
108 | objc_class_names_section, | |
109 | objc_meth_var_types_section, | |
110 | objc_meth_var_names_section, | |
111 | objc_category_section, | |
112 | objc_class_vars_section, | |
113 | objc_instance_vars_section, | |
114 | objc_module_info_section, | |
115 | objc_symbols_section | |
116 | }; | |
117 | size_t i; | |
b215c058 | 118 | |
92e4ba7d | 119 | been_here = true; |
120 | for (i = 0; i < ARRAY_SIZE (tomark); i++) | |
121 | switch_to_section (darwin_sections[tomark[i]]); | |
2f14b1f9 | 122 | } |
123 | output_section_asm_op (directive); | |
124 | } | |
125 | ||
126 | /* Implement TARGET_ASM_INIT_SECTIONS. */ | |
127 | ||
128 | void | |
129 | darwin_init_sections (void) | |
130 | { | |
92e4ba7d | 131 | #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) \ |
132 | darwin_sections[NAME] = \ | |
133 | get_unnamed_section (FLAGS, (OBJC \ | |
134 | ? output_objc_section_asm_op \ | |
135 | : output_section_asm_op), \ | |
136 | "\t" DIRECTIVE); | |
137 | #include "config/darwin-sections.def" | |
2f14b1f9 | 138 | #undef DEF_SECTION |
139 | ||
92e4ba7d | 140 | readonly_data_section = darwin_sections[const_section]; |
141 | exception_section = darwin_sections[darwin_exception_section]; | |
142 | eh_frame_section = darwin_sections[darwin_eh_frame_section]; | |
2f14b1f9 | 143 | } |
f0ed0e8a | 144 | |
80d725d7 | 145 | int |
b40da9a7 | 146 | name_needs_quotes (const char *name) |
80d725d7 | 147 | { |
148 | int c; | |
149 | while ((c = *name++) != '\0') | |
37ec5024 | 150 | if (! ISIDNUM (c) && c != '.' && c != '$') |
80d725d7 | 151 | return 1; |
152 | return 0; | |
153 | } | |
154 | ||
866318b4 | 155 | /* Return true if SYM_REF can be used without an indirection. */ |
ab06d2ff | 156 | static int |
157 | machopic_symbol_defined_p (rtx sym_ref) | |
80d725d7 | 158 | { |
866318b4 | 159 | if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_DEFINED) |
160 | return true; | |
161 | ||
162 | /* If a symbol references local and is not an extern to this | |
163 | file, then the symbol might be able to declared as defined. */ | |
164 | if (SYMBOL_REF_LOCAL_P (sym_ref) && ! SYMBOL_REF_EXTERNAL_P (sym_ref)) | |
165 | { | |
166 | /* If the symbol references a variable and the variable is a | |
167 | common symbol, then this symbol is not defined. */ | |
168 | if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_VARIABLE) | |
169 | { | |
170 | tree decl = SYMBOL_REF_DECL (sym_ref); | |
171 | if (!decl) | |
172 | return true; | |
173 | if (DECL_COMMON (decl)) | |
174 | return false; | |
175 | } | |
176 | return true; | |
177 | } | |
178 | return false; | |
80d725d7 | 179 | } |
180 | ||
ab06d2ff | 181 | /* This module assumes that (const (symbol_ref "foo")) is a legal pic |
182 | reference, which will not be changed. */ | |
b40da9a7 | 183 | |
80d725d7 | 184 | enum machopic_addr_class |
ab06d2ff | 185 | machopic_classify_symbol (rtx sym_ref) |
80d725d7 | 186 | { |
ab06d2ff | 187 | int flags; |
188 | bool function_p; | |
189 | ||
190 | flags = SYMBOL_REF_FLAGS (sym_ref); | |
191 | function_p = SYMBOL_REF_FUNCTION_P (sym_ref); | |
192 | if (machopic_symbol_defined_p (sym_ref)) | |
b215c058 | 193 | return (function_p |
ab06d2ff | 194 | ? MACHOPIC_DEFINED_FUNCTION : MACHOPIC_DEFINED_DATA); |
195 | else | |
b215c058 | 196 | return (function_p |
ab06d2ff | 197 | ? MACHOPIC_UNDEFINED_FUNCTION : MACHOPIC_UNDEFINED_DATA); |
80d725d7 | 198 | } |
199 | ||
f0ed0e8a | 200 | #ifndef TARGET_FIX_AND_CONTINUE |
201 | #define TARGET_FIX_AND_CONTINUE 0 | |
202 | #endif | |
203 | ||
204 | /* Indicate when fix-and-continue style code generation is being used | |
205 | and when a reference to data should be indirected so that it can be | |
0975351b | 206 | rebound in a new translation unit to reference the original instance |
f0ed0e8a | 207 | of that data. Symbol names that are for code generation local to |
208 | the translation unit are bound to the new translation unit; | |
209 | currently this means symbols that begin with L or _OBJC_; | |
210 | otherwise, we indicate that an indirect reference should be made to | |
211 | permit the runtime to rebind new instances of the translation unit | |
212 | to the original instance of the data. */ | |
213 | ||
214 | static int | |
215 | indirect_data (rtx sym_ref) | |
216 | { | |
217 | int lprefix; | |
218 | const char *name; | |
219 | ||
220 | /* If we aren't generating fix-and-continue code, don't do anything special. */ | |
221 | if (TARGET_FIX_AND_CONTINUE == 0) | |
222 | return 0; | |
223 | ||
224 | /* Otherwise, all symbol except symbols that begin with L or _OBJC_ | |
225 | are indirected. Symbols that begin with L and _OBJC_ are always | |
226 | bound to the current translation unit as they are used for | |
227 | generated local data of the translation unit. */ | |
228 | ||
229 | name = XSTR (sym_ref, 0); | |
230 | ||
231 | lprefix = (((name[0] == '*' || name[0] == '&') | |
232 | && (name[1] == 'L' || (name[1] == '"' && name[2] == 'L'))) | |
78a79402 | 233 | || (strncmp (name, "_OBJC_", 6) == 0)); |
f0ed0e8a | 234 | |
235 | return ! lprefix; | |
236 | } | |
237 | ||
238 | ||
80d725d7 | 239 | static int |
ab06d2ff | 240 | machopic_data_defined_p (rtx sym_ref) |
80d725d7 | 241 | { |
f0ed0e8a | 242 | if (indirect_data (sym_ref)) |
243 | return 0; | |
244 | ||
ab06d2ff | 245 | switch (machopic_classify_symbol (sym_ref)) |
80d725d7 | 246 | { |
247 | case MACHOPIC_DEFINED_DATA: | |
3a7ccce8 | 248 | case MACHOPIC_DEFINED_FUNCTION: |
80d725d7 | 249 | return 1; |
250 | default: | |
251 | return 0; | |
252 | } | |
253 | } | |
254 | ||
80d725d7 | 255 | void |
ab06d2ff | 256 | machopic_define_symbol (rtx mem) |
80d725d7 | 257 | { |
ab06d2ff | 258 | rtx sym_ref; |
b215c058 | 259 | |
27d2baef | 260 | gcc_assert (GET_CODE (mem) == MEM); |
ab06d2ff | 261 | sym_ref = XEXP (mem, 0); |
262 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; | |
80d725d7 | 263 | } |
264 | ||
3a32429b | 265 | static GTY(()) char * function_base; |
80d725d7 | 266 | |
a7260dec | 267 | const char * |
b40da9a7 | 268 | machopic_function_base_name (void) |
80d725d7 | 269 | { |
8f74ae7b | 270 | /* if dynamic-no-pic is on, we should not get here */ |
27d2baef | 271 | gcc_assert (!MACHO_DYNAMIC_NO_PIC_P); |
80d725d7 | 272 | |
b186bdc9 | 273 | if (function_base == NULL) |
b40da9a7 | 274 | function_base = |
b186bdc9 | 275 | (char *) ggc_alloc_string ("<pic base>", sizeof ("<pic base>")); |
276 | ||
277 | current_function_uses_pic_offset_table = 1; | |
278 | ||
279 | return function_base; | |
280 | } | |
281 | ||
ab06d2ff | 282 | /* Return a SYMBOL_REF for the PIC function base. */ |
283 | ||
284 | rtx | |
285 | machopic_function_base_sym (void) | |
286 | { | |
287 | rtx sym_ref; | |
288 | ||
289 | sym_ref = gen_rtx_SYMBOL_REF (Pmode, machopic_function_base_name ()); | |
b215c058 | 290 | SYMBOL_REF_FLAGS (sym_ref) |
ab06d2ff | 291 | |= (MACHO_SYMBOL_FLAG_VARIABLE | MACHO_SYMBOL_FLAG_DEFINED); |
292 | return sym_ref; | |
293 | } | |
294 | ||
b06a3cc3 | 295 | /* Return either ORIG or (const:P (minus:P ORIG PIC_BASE)), depending |
296 | on whether pic_base is NULL or not. */ | |
297 | static inline rtx | |
298 | gen_pic_offset (rtx orig, rtx pic_base) | |
299 | { | |
300 | if (!pic_base) | |
301 | return orig; | |
302 | else | |
303 | return gen_rtx_CONST (Pmode, gen_rtx_MINUS (Pmode, orig, pic_base)); | |
304 | } | |
305 | ||
b186bdc9 | 306 | static GTY(()) const char * function_base_func_name; |
307 | static GTY(()) int current_pic_label_num; | |
308 | ||
309 | void | |
310 | machopic_output_function_base_name (FILE *file) | |
311 | { | |
312 | const char *current_name; | |
313 | ||
1d60d981 | 314 | /* If dynamic-no-pic is on, we should not get here. */ |
27d2baef | 315 | gcc_assert (!MACHO_DYNAMIC_NO_PIC_P); |
b40da9a7 | 316 | current_name = |
b186bdc9 | 317 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl)); |
3a32429b | 318 | if (function_base_func_name != current_name) |
80d725d7 | 319 | { |
80d725d7 | 320 | ++current_pic_label_num; |
3a32429b | 321 | function_base_func_name = current_name; |
80d725d7 | 322 | } |
b186bdc9 | 323 | fprintf (file, "\"L%011d$pb\"", current_pic_label_num); |
80d725d7 | 324 | } |
325 | ||
ab06d2ff | 326 | /* The suffix attached to non-lazy pointer symbols. */ |
327 | #define NON_LAZY_POINTER_SUFFIX "$non_lazy_ptr" | |
328 | /* The suffix attached to stub symbols. */ | |
329 | #define STUB_SUFFIX "$stub" | |
80d725d7 | 330 | |
ab06d2ff | 331 | typedef struct machopic_indirection GTY (()) |
80d725d7 | 332 | { |
ab06d2ff | 333 | /* The SYMBOL_REF for the entity referenced. */ |
334 | rtx symbol; | |
6d3abfc0 | 335 | /* The name of the stub or non-lazy pointer. */ |
336 | const char * ptr_name; | |
ab06d2ff | 337 | /* True iff this entry is for a stub (as opposed to a non-lazy |
338 | pointer). */ | |
339 | bool stub_p; | |
340 | /* True iff this stub or pointer pointer has been referenced. */ | |
341 | bool used; | |
342 | } machopic_indirection; | |
343 | ||
344 | /* A table mapping stub names and non-lazy pointer names to | |
345 | SYMBOL_REFs for the stubbed-to and pointed-to entities. */ | |
346 | ||
b215c058 | 347 | static GTY ((param_is (struct machopic_indirection))) htab_t |
ab06d2ff | 348 | machopic_indirections; |
349 | ||
350 | /* Return a hash value for a SLOT in the indirections hash table. */ | |
351 | ||
352 | static hashval_t | |
353 | machopic_indirection_hash (const void *slot) | |
354 | { | |
355 | const machopic_indirection *p = (const machopic_indirection *) slot; | |
6d3abfc0 | 356 | return htab_hash_string (p->ptr_name); |
ab06d2ff | 357 | } |
b40da9a7 | 358 | |
ab06d2ff | 359 | /* Returns true if the KEY is the same as that associated with |
360 | SLOT. */ | |
361 | ||
362 | static int | |
363 | machopic_indirection_eq (const void *slot, const void *key) | |
364 | { | |
6d3abfc0 | 365 | return strcmp (((const machopic_indirection *) slot)->ptr_name, key) == 0; |
ab06d2ff | 366 | } |
80d725d7 | 367 | |
ab06d2ff | 368 | /* Return the name of the non-lazy pointer (if STUB_P is false) or |
369 | stub (if STUB_B is true) corresponding to the given name. */ | |
8dfaa51b | 370 | |
ab06d2ff | 371 | const char * |
372 | machopic_indirection_name (rtx sym_ref, bool stub_p) | |
373 | { | |
374 | char *buffer; | |
375 | const char *name = XSTR (sym_ref, 0); | |
6d3abfc0 | 376 | size_t namelen = strlen (name); |
ab06d2ff | 377 | machopic_indirection *p; |
6d3abfc0 | 378 | void ** slot; |
524eafbc | 379 | bool saw_star = false; |
380 | bool needs_quotes; | |
381 | const char *suffix; | |
382 | const char *prefix = user_label_prefix; | |
383 | const char *quote = ""; | |
b359164b | 384 | tree id; |
385 | ||
386 | id = maybe_get_identifier (name); | |
387 | if (id) | |
388 | { | |
389 | tree id_orig = id; | |
390 | ||
391 | while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
392 | id = TREE_CHAIN (id); | |
393 | if (id != id_orig) | |
394 | { | |
395 | name = IDENTIFIER_POINTER (id); | |
396 | namelen = strlen (name); | |
397 | } | |
398 | } | |
b215c058 | 399 | |
524eafbc | 400 | if (name[0] == '*') |
8dfaa51b | 401 | { |
524eafbc | 402 | saw_star = true; |
403 | prefix = ""; | |
404 | ++name; | |
405 | --namelen; | |
ab06d2ff | 406 | } |
524eafbc | 407 | |
408 | needs_quotes = name_needs_quotes (name); | |
409 | if (needs_quotes) | |
ab06d2ff | 410 | { |
524eafbc | 411 | quote = "\""; |
8dfaa51b | 412 | } |
413 | ||
524eafbc | 414 | if (stub_p) |
415 | suffix = STUB_SUFFIX; | |
416 | else | |
417 | suffix = NON_LAZY_POINTER_SUFFIX; | |
418 | ||
419 | buffer = alloca (strlen ("&L") | |
420 | + strlen (prefix) | |
421 | + namelen | |
422 | + strlen (suffix) | |
423 | + 2 * strlen (quote) | |
424 | + 1 /* '\0' */); | |
425 | ||
426 | /* Construct the name of the non-lazy pointer or stub. */ | |
427 | sprintf (buffer, "&%sL%s%s%s%s", quote, prefix, name, suffix, quote); | |
428 | ||
6d3abfc0 | 429 | if (!machopic_indirections) |
b215c058 | 430 | machopic_indirections = htab_create_ggc (37, |
6d3abfc0 | 431 | machopic_indirection_hash, |
432 | machopic_indirection_eq, | |
433 | /*htab_del=*/NULL); | |
b215c058 | 434 | |
6d3abfc0 | 435 | slot = htab_find_slot_with_hash (machopic_indirections, buffer, |
436 | htab_hash_string (buffer), INSERT); | |
437 | if (*slot) | |
438 | { | |
439 | p = (machopic_indirection *) *slot; | |
440 | } | |
441 | else | |
ab06d2ff | 442 | { |
ab06d2ff | 443 | p = (machopic_indirection *) ggc_alloc (sizeof (machopic_indirection)); |
444 | p->symbol = sym_ref; | |
6d3abfc0 | 445 | p->ptr_name = xstrdup (buffer); |
ab06d2ff | 446 | p->stub_p = stub_p; |
6d3abfc0 | 447 | p->used = false; |
448 | *slot = p; | |
ab06d2ff | 449 | } |
b215c058 | 450 | |
6d3abfc0 | 451 | return p->ptr_name; |
80d725d7 | 452 | } |
453 | ||
ab06d2ff | 454 | /* Return the name of the stub for the mcount function. */ |
80d725d7 | 455 | |
ab06d2ff | 456 | const char* |
457 | machopic_mcount_stub_name (void) | |
80d725d7 | 458 | { |
620dd87a | 459 | rtx symbol = gen_rtx_SYMBOL_REF (Pmode, "*mcount"); |
460 | return machopic_indirection_name (symbol, /*stub_p=*/true); | |
80d725d7 | 461 | } |
462 | ||
ab06d2ff | 463 | /* If NAME is the name of a stub or a non-lazy pointer , mark the stub |
464 | or non-lazy pointer as used -- and mark the object to which the | |
465 | pointer/stub refers as used as well, since the pointer/stub will | |
466 | emit a reference to it. */ | |
467 | ||
80d725d7 | 468 | void |
ab06d2ff | 469 | machopic_validate_stub_or_non_lazy_ptr (const char *name) |
80d725d7 | 470 | { |
ab06d2ff | 471 | machopic_indirection *p; |
b215c058 | 472 | |
473 | p = ((machopic_indirection *) | |
6d3abfc0 | 474 | (htab_find_with_hash (machopic_indirections, name, |
475 | htab_hash_string (name)))); | |
476 | if (p && ! p->used) | |
ab06d2ff | 477 | { |
6d3abfc0 | 478 | const char *real_name; |
479 | tree id; | |
b215c058 | 480 | |
6d3abfc0 | 481 | p->used = true; |
482 | ||
09e39ca0 | 483 | /* Do what output_addr_const will do when we actually call it. */ |
484 | if (SYMBOL_REF_DECL (p->symbol)) | |
485 | mark_decl_referenced (SYMBOL_REF_DECL (p->symbol)); | |
486 | ||
487 | real_name = targetm.strip_name_encoding (XSTR (p->symbol, 0)); | |
b215c058 | 488 | |
6d3abfc0 | 489 | id = maybe_get_identifier (real_name); |
490 | if (id) | |
491 | mark_referenced (id); | |
ab06d2ff | 492 | } |
80d725d7 | 493 | } |
494 | ||
495 | /* Transform ORIG, which may be any data source, to the corresponding | |
496 | source using indirections. */ | |
497 | ||
498 | rtx | |
b40da9a7 | 499 | machopic_indirect_data_reference (rtx orig, rtx reg) |
80d725d7 | 500 | { |
501 | rtx ptr_ref = orig; | |
b40da9a7 | 502 | |
80d725d7 | 503 | if (! MACHOPIC_INDIRECT) |
504 | return orig; | |
505 | ||
506 | if (GET_CODE (orig) == SYMBOL_REF) | |
507 | { | |
ab06d2ff | 508 | int defined = machopic_data_defined_p (orig); |
8f74ae7b | 509 | |
510 | if (defined && MACHO_DYNAMIC_NO_PIC_P) | |
511 | { | |
512 | #if defined (TARGET_TOC) | |
fed0a860 | 513 | /* Create a new register for CSE opportunities. */ |
514 | rtx hi_reg = (no_new_pseudos ? reg : gen_reg_rtx (Pmode)); | |
515 | emit_insn (gen_macho_high (hi_reg, orig)); | |
516 | emit_insn (gen_macho_low (reg, hi_reg, orig)); | |
8f74ae7b | 517 | #else |
518 | /* some other cpu -- writeme! */ | |
27d2baef | 519 | gcc_unreachable (); |
8f74ae7b | 520 | #endif |
521 | return reg; | |
522 | } | |
523 | else if (defined) | |
80d725d7 | 524 | { |
5352873f | 525 | #if defined (TARGET_TOC) || defined (HAVE_lo_sum) |
ab06d2ff | 526 | rtx pic_base = machopic_function_base_sym (); |
b06a3cc3 | 527 | rtx offset = gen_pic_offset (orig, pic_base); |
5352873f | 528 | #endif |
80d725d7 | 529 | |
530 | #if defined (TARGET_TOC) /* i.e., PowerPC */ | |
64668281 | 531 | rtx hi_sum_reg = (no_new_pseudos ? reg : gen_reg_rtx (Pmode)); |
80d725d7 | 532 | |
27d2baef | 533 | gcc_assert (reg); |
80d725d7 | 534 | |
37ec5024 | 535 | emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, |
536 | gen_rtx_PLUS (Pmode, pic_offset_table_rtx, | |
537 | gen_rtx_HIGH (Pmode, offset)))); | |
538 | emit_insn (gen_rtx_SET (Pmode, reg, | |
539 | gen_rtx_LO_SUM (Pmode, hi_sum_reg, offset))); | |
80d725d7 | 540 | |
541 | orig = reg; | |
542 | #else | |
543 | #if defined (HAVE_lo_sum) | |
27d2baef | 544 | gcc_assert (reg); |
80d725d7 | 545 | |
37ec5024 | 546 | emit_insn (gen_rtx_SET (VOIDmode, reg, |
547 | gen_rtx_HIGH (Pmode, offset))); | |
548 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
549 | gen_rtx_LO_SUM (Pmode, reg, offset))); | |
550 | emit_insn (gen_rtx_USE (VOIDmode, pic_offset_table_rtx)); | |
80d725d7 | 551 | |
37ec5024 | 552 | orig = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, reg); |
80d725d7 | 553 | #endif |
554 | #endif | |
555 | return orig; | |
556 | } | |
557 | ||
329f67ae | 558 | ptr_ref = (gen_rtx_SYMBOL_REF |
b215c058 | 559 | (Pmode, |
ab06d2ff | 560 | machopic_indirection_name (orig, /*stub_p=*/false))); |
80d725d7 | 561 | |
e265a6da | 562 | SYMBOL_REF_DECL (ptr_ref) = SYMBOL_REF_DECL (orig); |
f9226418 | 563 | |
e265a6da | 564 | ptr_ref = gen_const_mem (Pmode, ptr_ref); |
329f67ae | 565 | machopic_define_symbol (ptr_ref); |
80d725d7 | 566 | |
567 | return ptr_ref; | |
568 | } | |
569 | else if (GET_CODE (orig) == CONST) | |
570 | { | |
571 | rtx base, result; | |
572 | ||
573 | /* legitimize both operands of the PLUS */ | |
574 | if (GET_CODE (XEXP (orig, 0)) == PLUS) | |
575 | { | |
576 | base = machopic_indirect_data_reference (XEXP (XEXP (orig, 0), 0), | |
577 | reg); | |
578 | orig = machopic_indirect_data_reference (XEXP (XEXP (orig, 0), 1), | |
579 | (base == reg ? 0 : reg)); | |
580 | } | |
b40da9a7 | 581 | else |
80d725d7 | 582 | return orig; |
583 | ||
584 | if (MACHOPIC_PURE && GET_CODE (orig) == CONST_INT) | |
b244d4c7 | 585 | result = plus_constant (base, INTVAL (orig)); |
80d725d7 | 586 | else |
37ec5024 | 587 | result = gen_rtx_PLUS (Pmode, base, orig); |
80d725d7 | 588 | |
80d725d7 | 589 | if (MACHOPIC_JUST_INDIRECT && GET_CODE (base) == MEM) |
590 | { | |
591 | if (reg) | |
592 | { | |
593 | emit_move_insn (reg, result); | |
594 | result = reg; | |
595 | } | |
596 | else | |
597 | { | |
598 | result = force_reg (GET_MODE (result), result); | |
599 | } | |
600 | } | |
601 | ||
602 | return result; | |
603 | ||
604 | } | |
605 | else if (GET_CODE (orig) == MEM) | |
606 | XEXP (ptr_ref, 0) = machopic_indirect_data_reference (XEXP (orig, 0), reg); | |
607 | /* When the target is i386, this code prevents crashes due to the | |
608 | compiler's ignorance on how to move the PIC base register to | |
609 | other registers. (The reload phase sometimes introduces such | |
610 | insns.) */ | |
611 | else if (GET_CODE (orig) == PLUS | |
612 | && GET_CODE (XEXP (orig, 0)) == REG | |
613 | && REGNO (XEXP (orig, 0)) == PIC_OFFSET_TABLE_REGNUM | |
614 | #ifdef I386 | |
615 | /* Prevent the same register from being erroneously used | |
616 | as both the base and index registers. */ | |
617 | && GET_CODE (XEXP (orig, 1)) == CONST | |
618 | #endif | |
619 | && reg) | |
620 | { | |
621 | emit_move_insn (reg, XEXP (orig, 0)); | |
622 | XEXP (ptr_ref, 0) = reg; | |
623 | } | |
624 | return ptr_ref; | |
625 | } | |
626 | ||
80d725d7 | 627 | /* Transform TARGET (a MEM), which is a function call target, to the |
628 | corresponding symbol_stub if necessary. Return a new MEM. */ | |
629 | ||
630 | rtx | |
b40da9a7 | 631 | machopic_indirect_call_target (rtx target) |
80d725d7 | 632 | { |
633 | if (GET_CODE (target) != MEM) | |
634 | return target; | |
635 | ||
b215c058 | 636 | if (MACHOPIC_INDIRECT |
ab06d2ff | 637 | && GET_CODE (XEXP (target, 0)) == SYMBOL_REF |
638 | && !(SYMBOL_REF_FLAGS (XEXP (target, 0)) | |
639 | & MACHO_SYMBOL_FLAG_DEFINED)) | |
b40da9a7 | 640 | { |
ab06d2ff | 641 | rtx sym_ref = XEXP (target, 0); |
b215c058 | 642 | const char *stub_name = machopic_indirection_name (sym_ref, |
ab06d2ff | 643 | /*stub_p=*/true); |
644 | enum machine_mode mode = GET_MODE (sym_ref); | |
645 | tree decl = SYMBOL_REF_DECL (sym_ref); | |
b215c058 | 646 | |
ab06d2ff | 647 | XEXP (target, 0) = gen_rtx_SYMBOL_REF (mode, stub_name); |
648 | SYMBOL_REF_DECL (XEXP (target, 0)) = decl; | |
b04fab2a | 649 | MEM_READONLY_P (target) = 1; |
e265a6da | 650 | MEM_NOTRAP_P (target) = 1; |
80d725d7 | 651 | } |
652 | ||
653 | return target; | |
654 | } | |
655 | ||
656 | rtx | |
b40da9a7 | 657 | machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg) |
80d725d7 | 658 | { |
659 | rtx pic_ref = orig; | |
660 | ||
8f74ae7b | 661 | if (! MACHOPIC_INDIRECT) |
80d725d7 | 662 | return orig; |
663 | ||
664 | /* First handle a simple SYMBOL_REF or LABEL_REF */ | |
665 | if (GET_CODE (orig) == LABEL_REF | |
666 | || (GET_CODE (orig) == SYMBOL_REF | |
667 | )) | |
668 | { | |
669 | /* addr(foo) = &func+(foo-func) */ | |
670 | rtx pic_base; | |
671 | ||
672 | orig = machopic_indirect_data_reference (orig, reg); | |
673 | ||
b40da9a7 | 674 | if (GET_CODE (orig) == PLUS |
80d725d7 | 675 | && GET_CODE (XEXP (orig, 0)) == REG) |
676 | { | |
677 | if (reg == 0) | |
678 | return force_reg (mode, orig); | |
679 | ||
680 | emit_move_insn (reg, orig); | |
681 | return reg; | |
b40da9a7 | 682 | } |
80d725d7 | 683 | |
b06a3cc3 | 684 | /* if dynamic-no-pic we don't have a pic base */ |
8f74ae7b | 685 | if (MACHO_DYNAMIC_NO_PIC_P) |
b06a3cc3 | 686 | pic_base = NULL; |
8f74ae7b | 687 | else |
ab06d2ff | 688 | pic_base = machopic_function_base_sym (); |
80d725d7 | 689 | |
690 | if (GET_CODE (orig) == MEM) | |
691 | { | |
692 | if (reg == 0) | |
693 | { | |
27d2baef | 694 | gcc_assert (!reload_in_progress); |
695 | reg = gen_reg_rtx (Pmode); | |
80d725d7 | 696 | } |
b40da9a7 | 697 | |
80d725d7 | 698 | #ifdef HAVE_lo_sum |
8f74ae7b | 699 | if (MACHO_DYNAMIC_NO_PIC_P |
700 | && (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
701 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF)) | |
702 | { | |
703 | #if defined (TARGET_TOC) /* ppc */ | |
704 | rtx temp_reg = (no_new_pseudos) ? reg : gen_reg_rtx (Pmode); | |
705 | rtx asym = XEXP (orig, 0); | |
706 | rtx mem; | |
707 | ||
301a5e52 | 708 | emit_insn (gen_macho_high (temp_reg, asym)); |
e265a6da | 709 | mem = gen_const_mem (GET_MODE (orig), |
710 | gen_rtx_LO_SUM (Pmode, temp_reg, asym)); | |
37ec5024 | 711 | emit_insn (gen_rtx_SET (VOIDmode, reg, mem)); |
8f74ae7b | 712 | #else |
713 | /* Some other CPU -- WriteMe! but right now there are no other platform that can use dynamic-no-pic */ | |
27d2baef | 714 | gcc_unreachable (); |
8f74ae7b | 715 | #endif |
716 | pic_ref = reg; | |
717 | } | |
718 | else | |
b40da9a7 | 719 | if (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF |
80d725d7 | 720 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) |
721 | { | |
b06a3cc3 | 722 | rtx offset = gen_pic_offset (XEXP (orig, 0), pic_base); |
80d725d7 | 723 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
724 | /* Generating a new reg may expose opportunities for | |
725 | common subexpression elimination. */ | |
09c6aad0 | 726 | rtx hi_sum_reg = no_new_pseudos ? reg : gen_reg_rtx (Pmode); |
37ec5024 | 727 | rtx mem; |
728 | rtx insn; | |
729 | rtx sum; | |
b215c058 | 730 | |
37ec5024 | 731 | sum = gen_rtx_HIGH (Pmode, offset); |
732 | if (! MACHO_DYNAMIC_NO_PIC_P) | |
733 | sum = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, sum); | |
80d725d7 | 734 | |
37ec5024 | 735 | emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, sum)); |
736 | ||
e265a6da | 737 | mem = gen_const_mem (GET_MODE (orig), |
b215c058 | 738 | gen_rtx_LO_SUM (Pmode, |
e265a6da | 739 | hi_sum_reg, offset)); |
37ec5024 | 740 | insn = emit_insn (gen_rtx_SET (VOIDmode, reg, mem)); |
b215c058 | 741 | REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_EQUAL, pic_ref, |
37ec5024 | 742 | REG_NOTES (insn)); |
743 | ||
744 | pic_ref = reg; | |
80d725d7 | 745 | #else |
37ec5024 | 746 | emit_insn (gen_rtx_USE (VOIDmode, |
b215c058 | 747 | gen_rtx_REG (Pmode, |
37ec5024 | 748 | PIC_OFFSET_TABLE_REGNUM))); |
749 | ||
750 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
751 | gen_rtx_HIGH (Pmode, | |
b215c058 | 752 | gen_rtx_CONST (Pmode, |
37ec5024 | 753 | offset)))); |
754 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
755 | gen_rtx_LO_SUM (Pmode, reg, | |
756 | gen_rtx_CONST (Pmode, offset)))); | |
757 | pic_ref = gen_rtx_PLUS (Pmode, | |
758 | pic_offset_table_rtx, reg); | |
80d725d7 | 759 | #endif |
760 | } | |
761 | else | |
762 | #endif /* HAVE_lo_sum */ | |
763 | { | |
764 | rtx pic = pic_offset_table_rtx; | |
765 | if (GET_CODE (pic) != REG) | |
766 | { | |
767 | emit_move_insn (reg, pic); | |
768 | pic = reg; | |
769 | } | |
770 | #if 0 | |
37ec5024 | 771 | emit_insn (gen_rtx_USE (VOIDmode, |
b215c058 | 772 | gen_rtx_REG (Pmode, |
37ec5024 | 773 | PIC_OFFSET_TABLE_REGNUM))); |
80d725d7 | 774 | #endif |
775 | ||
3e111a71 | 776 | if (reload_in_progress) |
777 | regs_ever_live[REGNO (pic)] = 1; | |
b06a3cc3 | 778 | pic_ref = gen_rtx_PLUS (Pmode, pic, |
779 | gen_pic_offset (XEXP (orig, 0), | |
780 | pic_base)); | |
80d725d7 | 781 | } |
b40da9a7 | 782 | |
80d725d7 | 783 | #if !defined (TARGET_TOC) |
80d725d7 | 784 | emit_move_insn (reg, pic_ref); |
e265a6da | 785 | pic_ref = gen_const_mem (GET_MODE (orig), reg); |
7ba97778 | 786 | #endif |
80d725d7 | 787 | } |
788 | else | |
789 | { | |
790 | ||
791 | #ifdef HAVE_lo_sum | |
b40da9a7 | 792 | if (GET_CODE (orig) == SYMBOL_REF |
80d725d7 | 793 | || GET_CODE (orig) == LABEL_REF) |
794 | { | |
b06a3cc3 | 795 | rtx offset = gen_pic_offset (orig, pic_base); |
80d725d7 | 796 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
797 | rtx hi_sum_reg; | |
798 | ||
799 | if (reg == 0) | |
800 | { | |
27d2baef | 801 | gcc_assert (!reload_in_progress); |
802 | reg = gen_reg_rtx (Pmode); | |
80d725d7 | 803 | } |
b40da9a7 | 804 | |
80d725d7 | 805 | hi_sum_reg = reg; |
806 | ||
37ec5024 | 807 | emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, |
808 | (MACHO_DYNAMIC_NO_PIC_P) | |
809 | ? gen_rtx_HIGH (Pmode, offset) | |
810 | : gen_rtx_PLUS (Pmode, | |
811 | pic_offset_table_rtx, | |
b215c058 | 812 | gen_rtx_HIGH (Pmode, |
37ec5024 | 813 | offset)))); |
814 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
815 | gen_rtx_LO_SUM (Pmode, | |
816 | hi_sum_reg, offset))); | |
80d725d7 | 817 | pic_ref = reg; |
818 | #else | |
37ec5024 | 819 | emit_insn (gen_rtx_SET (VOIDmode, reg, |
820 | gen_rtx_HIGH (Pmode, offset))); | |
821 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
822 | gen_rtx_LO_SUM (Pmode, reg, offset))); | |
823 | pic_ref = gen_rtx_PLUS (Pmode, | |
824 | pic_offset_table_rtx, reg); | |
80d725d7 | 825 | #endif |
826 | } | |
827 | else | |
828 | #endif /* HAVE_lo_sum */ | |
829 | { | |
7a5893fc | 830 | if (REG_P (orig) |
831 | || GET_CODE (orig) == SUBREG) | |
80d725d7 | 832 | { |
833 | return orig; | |
834 | } | |
835 | else | |
836 | { | |
837 | rtx pic = pic_offset_table_rtx; | |
838 | if (GET_CODE (pic) != REG) | |
839 | { | |
840 | emit_move_insn (reg, pic); | |
841 | pic = reg; | |
842 | } | |
843 | #if 0 | |
37ec5024 | 844 | emit_insn (gen_rtx_USE (VOIDmode, |
845 | pic_offset_table_rtx)); | |
80d725d7 | 846 | #endif |
3e111a71 | 847 | if (reload_in_progress) |
848 | regs_ever_live[REGNO (pic)] = 1; | |
37ec5024 | 849 | pic_ref = gen_rtx_PLUS (Pmode, |
850 | pic, | |
b06a3cc3 | 851 | gen_pic_offset (orig, pic_base)); |
80d725d7 | 852 | } |
853 | } | |
854 | } | |
855 | ||
80d725d7 | 856 | if (GET_CODE (pic_ref) != REG) |
857 | { | |
858 | if (reg != 0) | |
859 | { | |
860 | emit_move_insn (reg, pic_ref); | |
861 | return reg; | |
862 | } | |
863 | else | |
864 | { | |
865 | return force_reg (mode, pic_ref); | |
866 | } | |
867 | } | |
868 | else | |
869 | { | |
870 | return pic_ref; | |
871 | } | |
872 | } | |
873 | ||
874 | else if (GET_CODE (orig) == SYMBOL_REF) | |
875 | return orig; | |
876 | ||
877 | else if (GET_CODE (orig) == PLUS | |
878 | && (GET_CODE (XEXP (orig, 0)) == MEM | |
879 | || GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
880 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) | |
881 | && XEXP (orig, 0) != pic_offset_table_rtx | |
882 | && GET_CODE (XEXP (orig, 1)) != REG) | |
b40da9a7 | 883 | |
80d725d7 | 884 | { |
885 | rtx base; | |
886 | int is_complex = (GET_CODE (XEXP (orig, 0)) == MEM); | |
887 | ||
888 | base = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
889 | orig = machopic_legitimize_pic_address (XEXP (orig, 1), | |
890 | Pmode, (base == reg ? 0 : reg)); | |
891 | if (GET_CODE (orig) == CONST_INT) | |
892 | { | |
b244d4c7 | 893 | pic_ref = plus_constant (base, INTVAL (orig)); |
80d725d7 | 894 | is_complex = 1; |
895 | } | |
896 | else | |
37ec5024 | 897 | pic_ref = gen_rtx_PLUS (Pmode, base, orig); |
80d725d7 | 898 | |
80d725d7 | 899 | if (reg && is_complex) |
900 | { | |
901 | emit_move_insn (reg, pic_ref); | |
902 | pic_ref = reg; | |
903 | } | |
904 | /* Likewise, should we set special REG_NOTEs here? */ | |
905 | } | |
906 | ||
907 | else if (GET_CODE (orig) == CONST) | |
908 | { | |
909 | return machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
910 | } | |
911 | ||
912 | else if (GET_CODE (orig) == MEM | |
913 | && GET_CODE (XEXP (orig, 0)) == SYMBOL_REF) | |
914 | { | |
915 | rtx addr = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
b04fab2a | 916 | addr = replace_equiv_address (orig, addr); |
80d725d7 | 917 | emit_move_insn (reg, addr); |
918 | pic_ref = reg; | |
919 | } | |
920 | ||
921 | return pic_ref; | |
922 | } | |
923 | ||
ab06d2ff | 924 | /* Output the stub or non-lazy pointer in *SLOT, if it has been used. |
925 | DATA is the FILE* for assembly output. Called from | |
926 | htab_traverse. */ | |
80d725d7 | 927 | |
ab06d2ff | 928 | static int |
929 | machopic_output_indirection (void **slot, void *data) | |
80d725d7 | 930 | { |
ab06d2ff | 931 | machopic_indirection *p = *((machopic_indirection **) slot); |
932 | FILE *asm_out_file = (FILE *) data; | |
933 | rtx symbol; | |
934 | const char *sym_name; | |
935 | const char *ptr_name; | |
b215c058 | 936 | |
ab06d2ff | 937 | if (!p->used) |
938 | return 1; | |
80d725d7 | 939 | |
ab06d2ff | 940 | symbol = p->symbol; |
941 | sym_name = XSTR (symbol, 0); | |
6d3abfc0 | 942 | ptr_name = p->ptr_name; |
b215c058 | 943 | |
ab06d2ff | 944 | if (p->stub_p) |
80d725d7 | 945 | { |
80d725d7 | 946 | char *sym; |
947 | char *stub; | |
b359164b | 948 | tree id; |
949 | ||
950 | id = maybe_get_identifier (sym_name); | |
951 | if (id) | |
952 | { | |
953 | tree id_orig = id; | |
954 | ||
955 | while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
956 | id = TREE_CHAIN (id); | |
957 | if (id != id_orig) | |
958 | sym_name = IDENTIFIER_POINTER (id); | |
959 | } | |
80d725d7 | 960 | |
80d725d7 | 961 | sym = alloca (strlen (sym_name) + 2); |
962 | if (sym_name[0] == '*' || sym_name[0] == '&') | |
963 | strcpy (sym, sym_name + 1); | |
964 | else if (sym_name[0] == '-' || sym_name[0] == '+') | |
b40da9a7 | 965 | strcpy (sym, sym_name); |
80d725d7 | 966 | else |
e9764bbb | 967 | sprintf (sym, "%s%s", user_label_prefix, sym_name); |
80d725d7 | 968 | |
ab06d2ff | 969 | stub = alloca (strlen (ptr_name) + 2); |
970 | if (ptr_name[0] == '*' || ptr_name[0] == '&') | |
971 | strcpy (stub, ptr_name + 1); | |
80d725d7 | 972 | else |
ab06d2ff | 973 | sprintf (stub, "%s%s", user_label_prefix, ptr_name); |
80d725d7 | 974 | |
09e39ca0 | 975 | machopic_output_stub (asm_out_file, sym, stub); |
80d725d7 | 976 | } |
f0ed0e8a | 977 | else if (! indirect_data (symbol) |
8d806159 | 978 | && (machopic_symbol_defined_p (symbol) |
979 | || SYMBOL_REF_LOCAL_P (symbol))) | |
80d725d7 | 980 | { |
2f14b1f9 | 981 | switch_to_section (data_section); |
ab06d2ff | 982 | assemble_align (GET_MODE_ALIGNMENT (Pmode)); |
983 | assemble_label (ptr_name); | |
984 | assemble_integer (gen_rtx_SYMBOL_REF (Pmode, sym_name), | |
985 | GET_MODE_SIZE (Pmode), | |
986 | GET_MODE_ALIGNMENT (Pmode), 1); | |
80d725d7 | 987 | } |
ab06d2ff | 988 | else |
989 | { | |
f0ed0e8a | 990 | rtx init = const0_rtx; |
991 | ||
92e4ba7d | 992 | switch_to_section (darwin_sections[machopic_nl_symbol_ptr_section]); |
ab06d2ff | 993 | assemble_name (asm_out_file, ptr_name); |
994 | fprintf (asm_out_file, ":\n"); | |
b215c058 | 995 | |
ab06d2ff | 996 | fprintf (asm_out_file, "\t.indirect_symbol "); |
997 | assemble_name (asm_out_file, sym_name); | |
998 | fprintf (asm_out_file, "\n"); | |
b215c058 | 999 | |
f0ed0e8a | 1000 | /* Variables that are marked with MACHO_SYMBOL_STATIC need to |
1001 | have their symbol name instead of 0 in the second entry of | |
1002 | the non-lazy symbol pointer data structure when they are | |
1003 | defined. This allows the runtime to rebind newer instances | |
1004 | of the translation unit with the original instance of the | |
d188633a | 1005 | symbol. */ |
f0ed0e8a | 1006 | |
1007 | if ((SYMBOL_REF_FLAGS (symbol) & MACHO_SYMBOL_STATIC) | |
1008 | && machopic_symbol_defined_p (symbol)) | |
1009 | init = gen_rtx_SYMBOL_REF (Pmode, sym_name); | |
1010 | ||
1011 | assemble_integer (init, GET_MODE_SIZE (Pmode), | |
ab06d2ff | 1012 | GET_MODE_ALIGNMENT (Pmode), 1); |
1013 | } | |
b215c058 | 1014 | |
ab06d2ff | 1015 | return 1; |
1016 | } | |
1017 | ||
1018 | void | |
1019 | machopic_finish (FILE *asm_out_file) | |
1020 | { | |
1021 | if (machopic_indirections) | |
f0ed0e8a | 1022 | htab_traverse_noresize (machopic_indirections, |
ab06d2ff | 1023 | machopic_output_indirection, |
1024 | asm_out_file); | |
80d725d7 | 1025 | } |
1026 | ||
b40da9a7 | 1027 | int |
1028 | machopic_operand_p (rtx op) | |
80d725d7 | 1029 | { |
1030 | if (MACHOPIC_JUST_INDIRECT) | |
1031 | { | |
1032 | while (GET_CODE (op) == CONST) | |
1033 | op = XEXP (op, 0); | |
1034 | ||
1035 | if (GET_CODE (op) == SYMBOL_REF) | |
ab06d2ff | 1036 | return machopic_symbol_defined_p (op); |
80d725d7 | 1037 | else |
1038 | return 0; | |
1039 | } | |
1040 | ||
1041 | while (GET_CODE (op) == CONST) | |
1042 | op = XEXP (op, 0); | |
1043 | ||
1044 | if (GET_CODE (op) == MINUS | |
1045 | && GET_CODE (XEXP (op, 0)) == SYMBOL_REF | |
1046 | && GET_CODE (XEXP (op, 1)) == SYMBOL_REF | |
ab06d2ff | 1047 | && machopic_symbol_defined_p (XEXP (op, 0)) |
1048 | && machopic_symbol_defined_p (XEXP (op, 1))) | |
80d725d7 | 1049 | return 1; |
1050 | ||
80d725d7 | 1051 | return 0; |
1052 | } | |
8dfaa51b | 1053 | |
1054 | /* This function records whether a given name corresponds to a defined | |
1055 | or undefined function or variable, for machopic_classify_ident to | |
1056 | use later. */ | |
1057 | ||
1058 | void | |
b40da9a7 | 1059 | darwin_encode_section_info (tree decl, rtx rtl, int first ATTRIBUTE_UNUSED) |
8dfaa51b | 1060 | { |
5a121a91 | 1061 | rtx sym_ref; |
8dfaa51b | 1062 | |
9af9a32c | 1063 | /* Do the standard encoding things first. */ |
1064 | default_encode_section_info (decl, rtl, first); | |
1065 | ||
ab06d2ff | 1066 | if (TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL) |
1067 | return; | |
9af9a32c | 1068 | |
ab06d2ff | 1069 | sym_ref = XEXP (rtl, 0); |
1070 | if (TREE_CODE (decl) == VAR_DECL) | |
1071 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_VARIABLE; | |
1072 | ||
1073 | if (!DECL_EXTERNAL (decl) | |
1dc74225 | 1074 | && (!TREE_PUBLIC (decl) || !DECL_WEAK (decl)) |
0a3ecdc1 | 1075 | && ! lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)) |
8dfaa51b | 1076 | && ((TREE_STATIC (decl) |
1077 | && (!DECL_COMMON (decl) || !TREE_PUBLIC (decl))) | |
2f4fae92 | 1078 | || (!DECL_COMMON (decl) && DECL_INITIAL (decl) |
fd419242 | 1079 | && DECL_INITIAL (decl) != error_mark_node))) |
ab06d2ff | 1080 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; |
f0ed0e8a | 1081 | |
d188633a | 1082 | if (! TREE_PUBLIC (decl)) |
f0ed0e8a | 1083 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_STATIC; |
e479d0de | 1084 | } |
01d15dc5 | 1085 | |
9423c9b7 | 1086 | void |
1087 | darwin_mark_decl_preserved (const char *name) | |
1088 | { | |
1089 | fprintf (asm_out_file, ".no_dead_strip "); | |
1090 | assemble_name (asm_out_file, name); | |
1091 | fputc ('\n', asm_out_file); | |
1092 | } | |
1093 | ||
2f14b1f9 | 1094 | section * |
b40da9a7 | 1095 | machopic_select_section (tree exp, int reloc, |
1096 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
52470889 | 1097 | { |
2f14b1f9 | 1098 | section *base_section; |
ba83457d | 1099 | bool weak_p = (DECL_P (exp) && DECL_WEAK (exp) |
1100 | && (lookup_attribute ("weak", DECL_ATTRIBUTES (exp)) | |
1101 | || ! lookup_attribute ("weak_import", | |
1102 | DECL_ATTRIBUTES (exp)))); | |
2f14b1f9 | 1103 | |
1dc74225 | 1104 | if (TREE_CODE (exp) == FUNCTION_DECL) |
2f14b1f9 | 1105 | { |
5fbee89d | 1106 | if (reloc == 1) |
2f14b1f9 | 1107 | base_section = (weak_p |
92e4ba7d | 1108 | ? darwin_sections[text_unlikely_coal_section] |
2f14b1f9 | 1109 | : unlikely_text_section ()); |
1110 | else | |
92e4ba7d | 1111 | base_section = weak_p ? darwin_sections[text_coal_section] : text_section; |
2f14b1f9 | 1112 | } |
1dc74225 | 1113 | else if (decl_readonly_section_1 (exp, reloc, MACHOPIC_INDIRECT)) |
92e4ba7d | 1114 | base_section = weak_p ? darwin_sections[const_coal_section] : darwin_sections[const_section]; |
7def0f5c | 1115 | else if (TREE_READONLY (exp) || TREE_CONSTANT (exp)) |
92e4ba7d | 1116 | base_section = weak_p ? darwin_sections[const_data_coal_section] : darwin_sections[const_data_section]; |
7def0f5c | 1117 | else |
92e4ba7d | 1118 | base_section = weak_p ? darwin_sections[data_coal_section] : data_section; |
b40da9a7 | 1119 | |
7def0f5c | 1120 | if (TREE_CODE (exp) == STRING_CST |
b40da9a7 | 1121 | && ((size_t) TREE_STRING_LENGTH (exp) |
a814bad5 | 1122 | == strlen (TREE_STRING_POINTER (exp)) + 1)) |
92e4ba7d | 1123 | return darwin_sections[cstring_section]; |
7def0f5c | 1124 | else if ((TREE_CODE (exp) == INTEGER_CST || TREE_CODE (exp) == REAL_CST) |
1125 | && flag_merge_constants) | |
52470889 | 1126 | { |
853b103d | 1127 | tree size = TYPE_SIZE_UNIT (TREE_TYPE (exp)); |
52470889 | 1128 | |
1129 | if (TREE_CODE (size) == INTEGER_CST && | |
1130 | TREE_INT_CST_LOW (size) == 4 && | |
1131 | TREE_INT_CST_HIGH (size) == 0) | |
92e4ba7d | 1132 | return darwin_sections[literal4_section]; |
52470889 | 1133 | else if (TREE_CODE (size) == INTEGER_CST && |
1134 | TREE_INT_CST_LOW (size) == 8 && | |
1135 | TREE_INT_CST_HIGH (size) == 0) | |
92e4ba7d | 1136 | return darwin_sections[literal8_section]; |
52470889 | 1137 | else |
2f14b1f9 | 1138 | return base_section; |
52470889 | 1139 | } |
1140 | else if (TREE_CODE (exp) == CONSTRUCTOR | |
1141 | && TREE_TYPE (exp) | |
1142 | && TREE_CODE (TREE_TYPE (exp)) == RECORD_TYPE | |
1143 | && TYPE_NAME (TREE_TYPE (exp))) | |
1144 | { | |
1145 | tree name = TYPE_NAME (TREE_TYPE (exp)); | |
1146 | if (TREE_CODE (name) == TYPE_DECL) | |
1147 | name = DECL_NAME (name); | |
0616a948 | 1148 | |
1149 | if (!strcmp (IDENTIFIER_POINTER (name), "__builtin_ObjCString")) | |
1150 | { | |
1151 | if (flag_next_runtime) | |
92e4ba7d | 1152 | return darwin_sections[objc_constant_string_object_section]; |
0616a948 | 1153 | else |
92e4ba7d | 1154 | return darwin_sections[objc_string_object_section]; |
0616a948 | 1155 | } |
52470889 | 1156 | else |
2f14b1f9 | 1157 | return base_section; |
52470889 | 1158 | } |
1159 | else if (TREE_CODE (exp) == VAR_DECL && | |
1160 | DECL_NAME (exp) && | |
1161 | TREE_CODE (DECL_NAME (exp)) == IDENTIFIER_NODE && | |
1162 | IDENTIFIER_POINTER (DECL_NAME (exp)) && | |
1163 | !strncmp (IDENTIFIER_POINTER (DECL_NAME (exp)), "_OBJC_", 6)) | |
1164 | { | |
1165 | const char *name = IDENTIFIER_POINTER (DECL_NAME (exp)); | |
1166 | ||
1167 | if (!strncmp (name, "_OBJC_CLASS_METHODS_", 20)) | |
92e4ba7d | 1168 | return darwin_sections[objc_cls_meth_section]; |
52470889 | 1169 | else if (!strncmp (name, "_OBJC_INSTANCE_METHODS_", 23)) |
92e4ba7d | 1170 | return darwin_sections[objc_inst_meth_section]; |
52470889 | 1171 | else if (!strncmp (name, "_OBJC_CATEGORY_CLASS_METHODS_", 20)) |
92e4ba7d | 1172 | return darwin_sections[objc_cat_cls_meth_section]; |
52470889 | 1173 | else if (!strncmp (name, "_OBJC_CATEGORY_INSTANCE_METHODS_", 23)) |
92e4ba7d | 1174 | return darwin_sections[objc_cat_inst_meth_section]; |
52470889 | 1175 | else if (!strncmp (name, "_OBJC_CLASS_VARIABLES_", 22)) |
92e4ba7d | 1176 | return darwin_sections[objc_class_vars_section]; |
52470889 | 1177 | else if (!strncmp (name, "_OBJC_INSTANCE_VARIABLES_", 25)) |
92e4ba7d | 1178 | return darwin_sections[objc_instance_vars_section]; |
52470889 | 1179 | else if (!strncmp (name, "_OBJC_CLASS_PROTOCOLS_", 22)) |
92e4ba7d | 1180 | return darwin_sections[objc_cat_cls_meth_section]; |
52470889 | 1181 | else if (!strncmp (name, "_OBJC_CLASS_NAME_", 17)) |
92e4ba7d | 1182 | return darwin_sections[objc_class_names_section]; |
52470889 | 1183 | else if (!strncmp (name, "_OBJC_METH_VAR_NAME_", 20)) |
92e4ba7d | 1184 | return darwin_sections[objc_meth_var_names_section]; |
52470889 | 1185 | else if (!strncmp (name, "_OBJC_METH_VAR_TYPE_", 20)) |
92e4ba7d | 1186 | return darwin_sections[objc_meth_var_types_section]; |
52470889 | 1187 | else if (!strncmp (name, "_OBJC_CLASS_REFERENCES", 22)) |
92e4ba7d | 1188 | return darwin_sections[objc_cls_refs_section]; |
52470889 | 1189 | else if (!strncmp (name, "_OBJC_CLASS_", 12)) |
92e4ba7d | 1190 | return darwin_sections[objc_class_section]; |
52470889 | 1191 | else if (!strncmp (name, "_OBJC_METACLASS_", 16)) |
92e4ba7d | 1192 | return darwin_sections[objc_meta_class_section]; |
52470889 | 1193 | else if (!strncmp (name, "_OBJC_CATEGORY_", 15)) |
92e4ba7d | 1194 | return darwin_sections[objc_category_section]; |
52470889 | 1195 | else if (!strncmp (name, "_OBJC_SELECTOR_REFERENCES", 25)) |
92e4ba7d | 1196 | return darwin_sections[objc_selector_refs_section]; |
52470889 | 1197 | else if (!strncmp (name, "_OBJC_SELECTOR_FIXUP", 20)) |
92e4ba7d | 1198 | return darwin_sections[objc_selector_fixup_section]; |
52470889 | 1199 | else if (!strncmp (name, "_OBJC_SYMBOLS", 13)) |
92e4ba7d | 1200 | return darwin_sections[objc_symbols_section]; |
52470889 | 1201 | else if (!strncmp (name, "_OBJC_MODULES", 13)) |
92e4ba7d | 1202 | return darwin_sections[objc_module_info_section]; |
c17b85ea | 1203 | else if (!strncmp (name, "_OBJC_IMAGE_INFO", 16)) |
92e4ba7d | 1204 | return darwin_sections[objc_image_info_section]; |
52470889 | 1205 | else if (!strncmp (name, "_OBJC_PROTOCOL_INSTANCE_METHODS_", 32)) |
92e4ba7d | 1206 | return darwin_sections[objc_cat_inst_meth_section]; |
52470889 | 1207 | else if (!strncmp (name, "_OBJC_PROTOCOL_CLASS_METHODS_", 29)) |
92e4ba7d | 1208 | return darwin_sections[objc_cat_cls_meth_section]; |
52470889 | 1209 | else if (!strncmp (name, "_OBJC_PROTOCOL_REFS_", 20)) |
92e4ba7d | 1210 | return darwin_sections[objc_cat_cls_meth_section]; |
52470889 | 1211 | else if (!strncmp (name, "_OBJC_PROTOCOL_", 15)) |
92e4ba7d | 1212 | return darwin_sections[objc_protocol_section]; |
52470889 | 1213 | else |
2f14b1f9 | 1214 | return base_section; |
52470889 | 1215 | } |
1216 | else | |
2f14b1f9 | 1217 | return base_section; |
52470889 | 1218 | } |
1219 | ||
bbfbe351 | 1220 | /* This can be called with address expressions as "rtx". |
9cb8e99f | 1221 | They must go in "const". */ |
bbfbe351 | 1222 | |
2f14b1f9 | 1223 | section * |
b40da9a7 | 1224 | machopic_select_rtx_section (enum machine_mode mode, rtx x, |
1225 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
bbfbe351 | 1226 | { |
f2e8796e | 1227 | if (GET_MODE_SIZE (mode) == 8 |
1228 | && (GET_CODE (x) == CONST_INT | |
1229 | || GET_CODE (x) == CONST_DOUBLE)) | |
92e4ba7d | 1230 | return darwin_sections[literal8_section]; |
bbfbe351 | 1231 | else if (GET_MODE_SIZE (mode) == 4 |
1232 | && (GET_CODE (x) == CONST_INT | |
1233 | || GET_CODE (x) == CONST_DOUBLE)) | |
92e4ba7d | 1234 | return darwin_sections[literal4_section]; |
459f8624 | 1235 | else if (MACHOPIC_INDIRECT |
76dece62 | 1236 | && (GET_CODE (x) == SYMBOL_REF |
1237 | || GET_CODE (x) == CONST | |
1238 | || GET_CODE (x) == LABEL_REF)) | |
92e4ba7d | 1239 | return darwin_sections[const_data_section]; |
bbfbe351 | 1240 | else |
92e4ba7d | 1241 | return darwin_sections[const_section]; |
bbfbe351 | 1242 | } |
1243 | ||
01d15dc5 | 1244 | void |
b40da9a7 | 1245 | machopic_asm_out_constructor (rtx symbol, int priority ATTRIBUTE_UNUSED) |
01d15dc5 | 1246 | { |
8f74ae7b | 1247 | if (MACHOPIC_INDIRECT) |
92e4ba7d | 1248 | switch_to_section (darwin_sections[mod_init_section]); |
01d15dc5 | 1249 | else |
92e4ba7d | 1250 | switch_to_section (darwin_sections[constructor_section]); |
09d688ff | 1251 | assemble_align (POINTER_SIZE); |
1252 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
01d15dc5 | 1253 | |
8f74ae7b | 1254 | if (! MACHOPIC_INDIRECT) |
01d15dc5 | 1255 | fprintf (asm_out_file, ".reference .constructors_used\n"); |
1256 | } | |
1257 | ||
1258 | void | |
b40da9a7 | 1259 | machopic_asm_out_destructor (rtx symbol, int priority ATTRIBUTE_UNUSED) |
01d15dc5 | 1260 | { |
8f74ae7b | 1261 | if (MACHOPIC_INDIRECT) |
92e4ba7d | 1262 | switch_to_section (darwin_sections[mod_term_section]); |
01d15dc5 | 1263 | else |
92e4ba7d | 1264 | switch_to_section (darwin_sections[destructor_section]); |
09d688ff | 1265 | assemble_align (POINTER_SIZE); |
1266 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
01d15dc5 | 1267 | |
8f74ae7b | 1268 | if (! MACHOPIC_INDIRECT) |
01d15dc5 | 1269 | fprintf (asm_out_file, ".reference .destructors_used\n"); |
1270 | } | |
1f3233d1 | 1271 | |
67c1e638 | 1272 | void |
b40da9a7 | 1273 | darwin_globalize_label (FILE *stream, const char *name) |
67c1e638 | 1274 | { |
1275 | if (!!strncmp (name, "_OBJC_", 6)) | |
1276 | default_globalize_label (stream, name); | |
1277 | } | |
1278 | ||
2f9fc8ef | 1279 | void |
b215c058 | 1280 | darwin_asm_named_section (const char *name, |
537cd941 | 1281 | unsigned int flags ATTRIBUTE_UNUSED, |
1282 | tree decl ATTRIBUTE_UNUSED) | |
2f9fc8ef | 1283 | { |
1dc74225 | 1284 | fprintf (asm_out_file, "\t.section %s\n", name); |
2f9fc8ef | 1285 | } |
1286 | ||
b215c058 | 1287 | void |
1dc74225 | 1288 | darwin_unique_section (tree decl ATTRIBUTE_UNUSED, int reloc ATTRIBUTE_UNUSED) |
2f9fc8ef | 1289 | { |
1dc74225 | 1290 | /* Darwin does not use unique sections. */ |
2f9fc8ef | 1291 | } |
1292 | ||
975d636c | 1293 | /* Handle a "weak_import" attribute; arguments as in |
1294 | struct attribute_spec.handler. */ | |
1295 | ||
1296 | tree | |
1297 | darwin_handle_weak_import_attribute (tree *node, tree name, | |
1298 | tree ARG_UNUSED (args), | |
1299 | int ARG_UNUSED (flags), | |
1300 | bool * no_add_attrs) | |
1301 | { | |
d0ddd548 | 1302 | if (TREE_CODE (*node) != FUNCTION_DECL && TREE_CODE (*node) != VAR_DECL) |
975d636c | 1303 | { |
9b2d6d13 | 1304 | warning (OPT_Wattributes, "%qs attribute ignored", |
1305 | IDENTIFIER_POINTER (name)); | |
975d636c | 1306 | *no_add_attrs = true; |
1307 | } | |
1308 | else | |
1309 | declare_weak (*node); | |
1310 | ||
1311 | return NULL_TREE; | |
1312 | } | |
a3952a36 | 1313 | |
1314 | static void | |
1315 | no_dead_strip (FILE *file, const char *lab) | |
1316 | { | |
975d636c | 1317 | fprintf (file, ".no_dead_strip %s\n", lab); |
a3952a36 | 1318 | } |
1319 | ||
b215c058 | 1320 | /* Emit a label for an FDE, making it global and/or weak if appropriate. |
ef1074f7 | 1321 | The third parameter is nonzero if this is for exception handling. |
1322 | The fourth parameter is nonzero if this is just a placeholder for an | |
2f9fc8ef | 1323 | FDE that we are omitting. */ |
ef1074f7 | 1324 | |
b215c058 | 1325 | void |
ef1074f7 | 1326 | darwin_emit_unwind_label (FILE *file, tree decl, int for_eh, int empty) |
2f9fc8ef | 1327 | { |
1328 | tree id = DECL_ASSEMBLER_NAME (decl) | |
1329 | ? DECL_ASSEMBLER_NAME (decl) | |
1330 | : DECL_NAME (decl); | |
1331 | ||
524eafbc | 1332 | const char *prefix = user_label_prefix; |
2f9fc8ef | 1333 | |
1334 | const char *base = IDENTIFIER_POINTER (id); | |
1335 | unsigned int base_len = IDENTIFIER_LENGTH (id); | |
1336 | ||
1337 | const char *suffix = ".eh"; | |
2f9fc8ef | 1338 | |
1339 | int need_quotes = name_needs_quotes (base); | |
1340 | int quotes_len = need_quotes ? 2 : 0; | |
ef1074f7 | 1341 | char *lab; |
1342 | ||
1343 | if (! for_eh) | |
1344 | suffix = ".eh1"; | |
2f9fc8ef | 1345 | |
524eafbc | 1346 | lab = xmalloc (strlen (prefix) |
1347 | + base_len + strlen (suffix) + quotes_len + 1); | |
2f9fc8ef | 1348 | lab[0] = '\0'; |
1349 | ||
1350 | if (need_quotes) | |
1351 | strcat(lab, "\""); | |
1352 | strcat(lab, prefix); | |
1353 | strcat(lab, base); | |
1354 | strcat(lab, suffix); | |
1355 | if (need_quotes) | |
1356 | strcat(lab, "\""); | |
1357 | ||
1358 | if (TREE_PUBLIC (decl)) | |
1dc74225 | 1359 | fprintf (file, "\t%s %s\n", |
2f9fc8ef | 1360 | (DECL_VISIBILITY (decl) != VISIBILITY_HIDDEN |
1361 | ? ".globl" | |
1362 | : ".private_extern"), | |
1363 | lab); | |
1364 | ||
1dc74225 | 1365 | if (DECL_WEAK (decl)) |
1366 | fprintf (file, "\t.weak_definition %s\n", lab); | |
2f9fc8ef | 1367 | |
1368 | if (empty) | |
a3952a36 | 1369 | { |
1370 | fprintf (file, "%s = 0\n", lab); | |
1371 | ||
1372 | /* Mark the absolute .eh and .eh1 style labels as needed to | |
1373 | ensure that we don't dead code strip them and keep such | |
1374 | labels from another instantiation point until we can fix this | |
1375 | properly with group comdat support. */ | |
1376 | no_dead_strip (file, lab); | |
1377 | } | |
2f9fc8ef | 1378 | else |
1379 | fprintf (file, "%s:\n", lab); | |
1380 | ||
1381 | free (lab); | |
1382 | } | |
1383 | ||
b215c058 | 1384 | static GTY(()) unsigned long except_table_label_num; |
1385 | ||
1386 | void | |
1387 | darwin_emit_except_table_label (FILE *file) | |
1388 | { | |
1389 | char section_start_label[30]; | |
1390 | ||
1391 | ASM_GENERATE_INTERNAL_LABEL (section_start_label, "GCC_except_table", | |
1392 | except_table_label_num++); | |
1393 | ASM_OUTPUT_LABEL (file, section_start_label); | |
1394 | } | |
1395 | /* Generate a PC-relative reference to a Mach-O non-lazy-symbol. */ | |
ef1074f7 | 1396 | |
2f9fc8ef | 1397 | void |
1398 | darwin_non_lazy_pcrel (FILE *file, rtx addr) | |
1399 | { | |
2f9fc8ef | 1400 | const char *nlp_name; |
1401 | ||
27d2baef | 1402 | gcc_assert (GET_CODE (addr) == SYMBOL_REF); |
2f9fc8ef | 1403 | |
ab06d2ff | 1404 | nlp_name = machopic_indirection_name (addr, /*stub_p=*/false); |
2f9fc8ef | 1405 | fputs ("\t.long\t", file); |
1406 | ASM_OUTPUT_LABELREF (file, nlp_name); | |
1407 | fputs ("-.", file); | |
1408 | } | |
1409 | ||
2c5b6111 | 1410 | /* Emit an assembler directive to set visibility for a symbol. The |
1411 | only supported visibilities are VISIBILITY_DEFAULT and | |
1412 | VISIBILITY_HIDDEN; the latter corresponds to Darwin's "private | |
1413 | extern". There is no MACH-O equivalent of ELF's | |
1414 | VISIBILITY_INTERNAL or VISIBILITY_PROTECTED. */ | |
1415 | ||
b215c058 | 1416 | void |
2c5b6111 | 1417 | darwin_assemble_visibility (tree decl, int vis) |
1418 | { | |
1419 | if (vis == VISIBILITY_DEFAULT) | |
1420 | ; | |
1421 | else if (vis == VISIBILITY_HIDDEN) | |
1422 | { | |
1423 | fputs ("\t.private_extern ", asm_out_file); | |
1424 | assemble_name (asm_out_file, | |
1425 | (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)))); | |
1426 | fputs ("\n", asm_out_file); | |
1427 | } | |
1428 | else | |
9b2d6d13 | 1429 | warning (OPT_Wattributes, "internal and protected visibility attributes " |
1430 | "not supported in this configuration; ignored"); | |
2c5b6111 | 1431 | } |
1432 | ||
a08b74c8 | 1433 | /* Output a difference of two labels that will be an assembly time |
1434 | constant if the two labels are local. (.long lab1-lab2 will be | |
1435 | very different if lab1 is at the boundary between two sections; it | |
1436 | will be relocated according to the second section, not the first, | |
1437 | so one ends up with a difference between labels in different | |
1438 | sections, which is bad in the dwarf2 eh context for instance.) */ | |
1439 | ||
1440 | static int darwin_dwarf_label_counter; | |
1441 | ||
1442 | void | |
85d3e3b5 | 1443 | darwin_asm_output_dwarf_delta (FILE *file, int size, |
b40da9a7 | 1444 | const char *lab1, const char *lab2) |
a08b74c8 | 1445 | { |
2f9fc8ef | 1446 | int islocaldiff = (lab1[0] == '*' && lab1[1] == 'L' |
1447 | && lab2[0] == '*' && lab2[1] == 'L'); | |
dcf3c3f7 | 1448 | const char *directive = (size == 8 ? ".quad" : ".long"); |
a08b74c8 | 1449 | |
1450 | if (islocaldiff) | |
1451 | fprintf (file, "\t.set L$set$%d,", darwin_dwarf_label_counter); | |
1452 | else | |
85d3e3b5 | 1453 | fprintf (file, "\t%s\t", directive); |
48126f0c | 1454 | assemble_name_raw (file, lab1); |
a08b74c8 | 1455 | fprintf (file, "-"); |
48126f0c | 1456 | assemble_name_raw (file, lab2); |
a08b74c8 | 1457 | if (islocaldiff) |
85d3e3b5 | 1458 | fprintf (file, "\n\t%s L$set$%d", directive, darwin_dwarf_label_counter++); |
a08b74c8 | 1459 | } |
1460 | ||
f6940372 | 1461 | void |
b40da9a7 | 1462 | darwin_file_end (void) |
f6940372 | 1463 | { |
1464 | machopic_finish (asm_out_file); | |
1465 | if (strcmp (lang_hooks.name, "GNU C++") == 0) | |
1466 | { | |
92e4ba7d | 1467 | switch_to_section (darwin_sections[constructor_section]); |
1468 | switch_to_section (darwin_sections[destructor_section]); | |
f6940372 | 1469 | ASM_OUTPUT_ALIGN (asm_out_file, 1); |
1470 | } | |
9e96724e | 1471 | fprintf (asm_out_file, "\t.subsections_via_symbols\n"); |
f6940372 | 1472 | } |
1473 | ||
0765d519 | 1474 | /* Cross-module name binding. Darwin does not support overriding |
1475 | functions at dynamic-link time. */ | |
1476 | ||
1477 | bool | |
1478 | darwin_binds_local_p (tree decl) | |
1479 | { | |
1480 | return default_binds_local_p_1 (decl, 0); | |
1481 | } | |
1482 | ||
1f3233d1 | 1483 | #include "gt-darwin.h" |