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80d725d7 | 1 | /* Functions for generic Darwin as target machine for GNU C compiler. |
fbd26352 | 2 | Copyright (C) 1989-2019 Free Software Foundation, Inc. |
80d725d7 | 3 | Contributed by Apple Computer Inc. |
4 | ||
187b36cf | 5 | This file is part of GCC. |
80d725d7 | 6 | |
187b36cf | 7 | GCC is free software; you can redistribute it and/or modify |
80d725d7 | 8 | it under the terms of the GNU General Public License as published by |
038d1e19 | 9 | the Free Software Foundation; either version 3, or (at your option) |
80d725d7 | 10 | any later version. |
11 | ||
187b36cf | 12 | GCC is distributed in the hope that it will be useful, |
80d725d7 | 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
038d1e19 | 18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
80d725d7 | 20 | |
785790dc | 21 | #define IN_TARGET_CODE 1 |
22 | ||
80d725d7 | 23 | #include "config.h" |
24 | #include "system.h" | |
805e22b2 | 25 | #include "coretypes.h" |
9ef16211 | 26 | #include "backend.h" |
c1eb80de | 27 | #include "target.h" |
28 | #include "rtl.h" | |
9ef16211 | 29 | #include "tree.h" |
30 | #include "gimple.h" | |
c1eb80de | 31 | #include "cfghooks.h" |
9ef16211 | 32 | #include "df.h" |
ad7b10a2 | 33 | #include "memmodel.h" |
c1eb80de | 34 | #include "tm_p.h" |
35 | #include "stringpool.h" | |
30a86690 | 36 | #include "attribs.h" |
80d725d7 | 37 | #include "insn-config.h" |
c1eb80de | 38 | #include "emit-rtl.h" |
39 | #include "cgraph.h" | |
40 | #include "lto-streamer.h" | |
80d725d7 | 41 | #include "output.h" |
9ed99284 | 42 | #include "varasm.h" |
43 | #include "stor-layout.h" | |
d53441c8 | 44 | #include "explow.h" |
80d725d7 | 45 | #include "expr.h" |
d19bd1f0 | 46 | #include "langhooks.h" |
690abe5d | 47 | #include "toplev.h" |
47131315 | 48 | #include "lto-section-names.h" |
c1c6d679 | 49 | #include "intl.h" |
80d725d7 | 50 | |
f0ed0e8a | 51 | /* Darwin supports a feature called fix-and-continue, which is used |
52 | for rapid turn around debugging. When code is compiled with the | |
53 | -mfix-and-continue flag, two changes are made to the generated code | |
54 | that allow the system to do things that it would normally not be | |
55 | able to do easily. These changes allow gdb to load in | |
56 | recompilation of a translation unit that has been changed into a | |
57 | running program and replace existing functions and methods of that | |
cb4213cd | 58 | translation unit with versions of those functions and methods |
f0ed0e8a | 59 | from the newly compiled translation unit. The new functions access |
d188633a | 60 | the existing static symbols from the old translation unit, if the |
61 | symbol existed in the unit to be replaced, and from the new | |
62 | translation unit, otherwise. | |
f0ed0e8a | 63 | |
8063e558 | 64 | The changes are to insert 5 nops at the beginning of all functions |
d188633a | 65 | and to use indirection to get at static symbols. The 5 nops |
f0ed0e8a | 66 | are required by consumers of the generated code. Currently, gdb |
67 | uses this to patch in a jump to the overriding function, this | |
68 | allows all uses of the old name to forward to the replacement, | |
84cbcde5 | 69 | including existing function pointers and virtual methods. See |
f0ed0e8a | 70 | rs6000_emit_prologue for the code that handles the nop insertions. |
b215c058 | 71 | |
f0ed0e8a | 72 | The added indirection allows gdb to redirect accesses to static |
d188633a | 73 | symbols from the newly loaded translation unit to the existing |
74 | symbol, if any. @code{static} symbols are special and are handled by | |
75 | setting the second word in the .non_lazy_symbol_pointer data | |
76 | structure to symbol. See indirect_data for the code that handles | |
77 | the extra indirection, and machopic_output_indirection and its use | |
78 | of MACHO_SYMBOL_STATIC for the code that handles @code{static} | |
79 | symbol indirection. */ | |
f0ed0e8a | 80 | |
ed161dab | 81 | typedef struct GTY(()) cdtor_record { |
4b313269 | 82 | rtx symbol; |
ed161dab | 83 | int priority; /* [con/de]structor priority */ |
4b313269 | 84 | int position; /* original position */ |
ed161dab | 85 | } cdtor_record; |
4b313269 | 86 | |
ed161dab | 87 | static GTY(()) vec<cdtor_record, va_gc> *ctors = NULL; |
88 | static GTY(()) vec<cdtor_record, va_gc> *dtors = NULL; | |
4b313269 | 89 | |
d4238e8b | 90 | /* A flag to determine whether we are running c++ or obj-c++. This has to be |
91 | settable from non-c-family contexts too (i.e. we can't use the c_dialect_ | |
92 | functions). */ | |
93 | int darwin_running_cxx; | |
94 | ||
9e09909d | 95 | /* Some code-gen now depends on OS major version numbers (at least). */ |
96 | int generating_for_darwin_version ; | |
97 | ||
f199808c | 98 | /* For older linkers we need to emit special sections (marked 'coalesced') for |
99 | for weak or single-definition items. */ | |
100 | static bool ld_uses_coal_sects = false; | |
101 | ||
7e96ac5f | 102 | /* Very old (ld_classic) linkers need a symbol to mark the start of |
103 | each FDE. */ | |
104 | static bool ld_needs_eh_markers = false; | |
105 | ||
92e4ba7d | 106 | /* Section names. */ |
107 | section * darwin_sections[NUM_DARWIN_SECTIONS]; | |
2f14b1f9 | 108 | |
90ff10b3 | 109 | /* While we transition to using in-tests instead of ifdef'd code. */ |
6cc3d6ec | 110 | #if !HAVE_lo_sum |
90ff10b3 | 111 | #define gen_macho_high(a,b) (a) |
112 | #define gen_macho_low(a,b,c) (a) | |
113 | #endif | |
114 | ||
f720b7c6 | 115 | /* True if we're setting __attribute__ ((ms_struct)). */ |
116 | int darwin_ms_struct = false; | |
117 | ||
02dcca88 | 118 | /* Earlier versions of Darwin as do not recognize an alignment field in |
8e79e9d4 | 119 | .comm directives, this should be set for versions that allow it. */ |
120 | int emit_aligned_common = false; | |
121 | ||
2f14b1f9 | 122 | /* A get_unnamed_section callback used to switch to an ObjC section. |
123 | DIRECTIVE is as for output_section_asm_op. */ | |
124 | ||
125 | static void | |
126 | output_objc_section_asm_op (const void *directive) | |
127 | { | |
92e4ba7d | 128 | static bool been_here = false; |
2f14b1f9 | 129 | |
02dcca88 | 130 | /* The NeXT ObjC Runtime requires these sections to be present and in |
131 | order in the object. The code below implements this by emitting | |
163c9fff | 132 | a section header for each ObjC section the first time that an ObjC |
133 | section is requested. */ | |
92e4ba7d | 134 | if (! been_here) |
2f14b1f9 | 135 | { |
c4796e8b | 136 | section *saved_in_section = in_section; |
b215c058 | 137 | static const enum darwin_section_enum tomark[] = |
92e4ba7d | 138 | { |
139 | /* written, cold -> hot */ | |
140 | objc_cat_cls_meth_section, | |
141 | objc_cat_inst_meth_section, | |
142 | objc_string_object_section, | |
143 | objc_constant_string_object_section, | |
144 | objc_selector_refs_section, | |
145 | objc_selector_fixup_section, | |
146 | objc_cls_refs_section, | |
147 | objc_class_section, | |
148 | objc_meta_class_section, | |
149 | /* shared, hot -> cold */ | |
150 | objc_cls_meth_section, | |
151 | objc_inst_meth_section, | |
152 | objc_protocol_section, | |
153 | objc_class_names_section, | |
154 | objc_meth_var_types_section, | |
155 | objc_meth_var_names_section, | |
156 | objc_category_section, | |
157 | objc_class_vars_section, | |
158 | objc_instance_vars_section, | |
159 | objc_module_info_section, | |
267785bc | 160 | objc_symbols_section, |
92e4ba7d | 161 | }; |
267785bc | 162 | /* ABI=1 */ |
163 | static const enum darwin_section_enum tomarkv1[] = | |
164 | { | |
165 | objc1_protocol_ext_section, | |
166 | objc1_class_ext_section, | |
167 | objc1_prop_list_section | |
168 | } ; | |
169 | /* ABI=2 */ | |
170 | static const enum darwin_section_enum tomarkv2[] = | |
171 | { | |
172 | objc2_message_refs_section, | |
173 | objc2_classdefs_section, | |
174 | objc2_metadata_section, | |
175 | objc2_classrefs_section, | |
176 | objc2_classlist_section, | |
177 | objc2_categorylist_section, | |
178 | objc2_selector_refs_section, | |
179 | objc2_nonlazy_class_section, | |
180 | objc2_nonlazy_category_section, | |
181 | objc2_protocollist_section, | |
182 | objc2_protocolrefs_section, | |
183 | objc2_super_classrefs_section, | |
184 | objc2_image_info_section, | |
185 | objc2_constant_string_object_section | |
186 | } ; | |
92e4ba7d | 187 | size_t i; |
b215c058 | 188 | |
92e4ba7d | 189 | been_here = true; |
267785bc | 190 | if (flag_objc_abi < 2) |
191 | { | |
192 | for (i = 0; i < ARRAY_SIZE (tomark); i++) | |
193 | switch_to_section (darwin_sections[tomark[i]]); | |
194 | if (flag_objc_abi == 1) | |
195 | for (i = 0; i < ARRAY_SIZE (tomarkv1); i++) | |
196 | switch_to_section (darwin_sections[tomarkv1[i]]); | |
197 | } | |
198 | else | |
199 | for (i = 0; i < ARRAY_SIZE (tomarkv2); i++) | |
200 | switch_to_section (darwin_sections[tomarkv2[i]]); | |
201 | /* Make sure we don't get varasm.c out of sync with us. */ | |
c4796e8b | 202 | switch_to_section (saved_in_section); |
2f14b1f9 | 203 | } |
204 | output_section_asm_op (directive); | |
205 | } | |
206 | ||
61aeb501 | 207 | |
208 | /* Private flag applied to disable section-anchors in a particular section. */ | |
209 | #define SECTION_NO_ANCHOR SECTION_MACH_DEP | |
210 | ||
211 | ||
2f14b1f9 | 212 | /* Implement TARGET_ASM_INIT_SECTIONS. */ |
213 | ||
214 | void | |
215 | darwin_init_sections (void) | |
216 | { | |
92e4ba7d | 217 | #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) \ |
218 | darwin_sections[NAME] = \ | |
219 | get_unnamed_section (FLAGS, (OBJC \ | |
220 | ? output_objc_section_asm_op \ | |
221 | : output_section_asm_op), \ | |
222 | "\t" DIRECTIVE); | |
223 | #include "config/darwin-sections.def" | |
2f14b1f9 | 224 | #undef DEF_SECTION |
225 | ||
92e4ba7d | 226 | readonly_data_section = darwin_sections[const_section]; |
227 | exception_section = darwin_sections[darwin_exception_section]; | |
228 | eh_frame_section = darwin_sections[darwin_eh_frame_section]; | |
f199808c | 229 | |
230 | /* If our linker is new enough to coalesce weak symbols, then we | |
231 | can just put picbase_thunks into the text section. */ | |
232 | if (! ld_uses_coal_sects ) | |
233 | darwin_sections[picbase_thunk_section] = text_section; | |
2f14b1f9 | 234 | } |
f0ed0e8a | 235 | |
80d725d7 | 236 | int |
b40da9a7 | 237 | name_needs_quotes (const char *name) |
80d725d7 | 238 | { |
239 | int c; | |
240 | while ((c = *name++) != '\0') | |
02dcca88 | 241 | if (! ISIDNUM (c) |
163c9fff | 242 | && c != '.' && c != '$' && c != '_' ) |
80d725d7 | 243 | return 1; |
244 | return 0; | |
245 | } | |
246 | ||
866318b4 | 247 | /* Return true if SYM_REF can be used without an indirection. */ |
90ff10b3 | 248 | int |
ab06d2ff | 249 | machopic_symbol_defined_p (rtx sym_ref) |
80d725d7 | 250 | { |
866318b4 | 251 | if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_DEFINED) |
252 | return true; | |
253 | ||
254 | /* If a symbol references local and is not an extern to this | |
255 | file, then the symbol might be able to declared as defined. */ | |
256 | if (SYMBOL_REF_LOCAL_P (sym_ref) && ! SYMBOL_REF_EXTERNAL_P (sym_ref)) | |
257 | { | |
258 | /* If the symbol references a variable and the variable is a | |
259 | common symbol, then this symbol is not defined. */ | |
260 | if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_VARIABLE) | |
261 | { | |
262 | tree decl = SYMBOL_REF_DECL (sym_ref); | |
263 | if (!decl) | |
264 | return true; | |
265 | if (DECL_COMMON (decl)) | |
266 | return false; | |
267 | } | |
268 | return true; | |
269 | } | |
270 | return false; | |
80d725d7 | 271 | } |
272 | ||
ab06d2ff | 273 | /* This module assumes that (const (symbol_ref "foo")) is a legal pic |
274 | reference, which will not be changed. */ | |
b40da9a7 | 275 | |
80d725d7 | 276 | enum machopic_addr_class |
ab06d2ff | 277 | machopic_classify_symbol (rtx sym_ref) |
80d725d7 | 278 | { |
ab06d2ff | 279 | bool function_p; |
280 | ||
ab06d2ff | 281 | function_p = SYMBOL_REF_FUNCTION_P (sym_ref); |
282 | if (machopic_symbol_defined_p (sym_ref)) | |
b215c058 | 283 | return (function_p |
ab06d2ff | 284 | ? MACHOPIC_DEFINED_FUNCTION : MACHOPIC_DEFINED_DATA); |
285 | else | |
b215c058 | 286 | return (function_p |
ab06d2ff | 287 | ? MACHOPIC_UNDEFINED_FUNCTION : MACHOPIC_UNDEFINED_DATA); |
80d725d7 | 288 | } |
289 | ||
f0ed0e8a | 290 | #ifndef TARGET_FIX_AND_CONTINUE |
291 | #define TARGET_FIX_AND_CONTINUE 0 | |
292 | #endif | |
293 | ||
294 | /* Indicate when fix-and-continue style code generation is being used | |
295 | and when a reference to data should be indirected so that it can be | |
0975351b | 296 | rebound in a new translation unit to reference the original instance |
f0ed0e8a | 297 | of that data. Symbol names that are for code generation local to |
298 | the translation unit are bound to the new translation unit; | |
299 | currently this means symbols that begin with L or _OBJC_; | |
300 | otherwise, we indicate that an indirect reference should be made to | |
301 | permit the runtime to rebind new instances of the translation unit | |
302 | to the original instance of the data. */ | |
303 | ||
304 | static int | |
305 | indirect_data (rtx sym_ref) | |
306 | { | |
307 | int lprefix; | |
308 | const char *name; | |
309 | ||
c4f8e01f | 310 | /* If we aren't generating fix-and-continue code, don't do anything |
311 | special. */ | |
f0ed0e8a | 312 | if (TARGET_FIX_AND_CONTINUE == 0) |
313 | return 0; | |
314 | ||
315 | /* Otherwise, all symbol except symbols that begin with L or _OBJC_ | |
316 | are indirected. Symbols that begin with L and _OBJC_ are always | |
317 | bound to the current translation unit as they are used for | |
318 | generated local data of the translation unit. */ | |
319 | ||
320 | name = XSTR (sym_ref, 0); | |
321 | ||
322 | lprefix = (((name[0] == '*' || name[0] == '&') | |
323 | && (name[1] == 'L' || (name[1] == '"' && name[2] == 'L'))) | |
78a79402 | 324 | || (strncmp (name, "_OBJC_", 6) == 0)); |
f0ed0e8a | 325 | |
326 | return ! lprefix; | |
327 | } | |
328 | ||
80d725d7 | 329 | static int |
ab06d2ff | 330 | machopic_data_defined_p (rtx sym_ref) |
80d725d7 | 331 | { |
f0ed0e8a | 332 | if (indirect_data (sym_ref)) |
333 | return 0; | |
334 | ||
ab06d2ff | 335 | switch (machopic_classify_symbol (sym_ref)) |
80d725d7 | 336 | { |
337 | case MACHOPIC_DEFINED_DATA: | |
3a7ccce8 | 338 | case MACHOPIC_DEFINED_FUNCTION: |
80d725d7 | 339 | return 1; |
340 | default: | |
341 | return 0; | |
342 | } | |
343 | } | |
344 | ||
80d725d7 | 345 | void |
ab06d2ff | 346 | machopic_define_symbol (rtx mem) |
80d725d7 | 347 | { |
ab06d2ff | 348 | rtx sym_ref; |
b215c058 | 349 | |
27d2baef | 350 | gcc_assert (GET_CODE (mem) == MEM); |
ab06d2ff | 351 | sym_ref = XEXP (mem, 0); |
352 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; | |
80d725d7 | 353 | } |
354 | ||
a914e728 | 355 | /* Return either ORIG or: |
80d725d7 | 356 | |
a914e728 | 357 | (const:P (unspec:P [ORIG] UNSPEC_MACHOPIC_OFFSET)) |
ab06d2ff | 358 | |
a914e728 | 359 | depending on MACHO_DYNAMIC_NO_PIC_P. */ |
ab06d2ff | 360 | rtx |
a914e728 | 361 | machopic_gen_offset (rtx orig) |
ab06d2ff | 362 | { |
a914e728 | 363 | if (MACHO_DYNAMIC_NO_PIC_P) |
b06a3cc3 | 364 | return orig; |
365 | else | |
a914e728 | 366 | { |
367 | /* Play games to avoid marking the function as needing pic if we | |
368 | are being called as part of the cost-estimation process. */ | |
e5d1687d | 369 | if (current_ir_type () != IR_GIMPLE || currently_expanding_to_rtl) |
a914e728 | 370 | crtl->uses_pic_offset_table = 1; |
371 | orig = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, orig), | |
372 | UNSPEC_MACHOPIC_OFFSET); | |
373 | return gen_rtx_CONST (Pmode, orig); | |
374 | } | |
b06a3cc3 | 375 | } |
376 | ||
b186bdc9 | 377 | static GTY(()) const char * function_base_func_name; |
378 | static GTY(()) int current_pic_label_num; | |
f212a7d0 | 379 | static GTY(()) int emitted_pic_label_num; |
b186bdc9 | 380 | |
f212a7d0 | 381 | static void |
382 | update_pic_label_number_if_needed (void) | |
b186bdc9 | 383 | { |
384 | const char *current_name; | |
385 | ||
90ff10b3 | 386 | /* When we are generating _get_pc thunks within stubs, there is no current |
387 | function. */ | |
388 | if (current_function_decl) | |
389 | { | |
390 | current_name = | |
391 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl)); | |
392 | if (function_base_func_name != current_name) | |
393 | { | |
394 | ++current_pic_label_num; | |
395 | function_base_func_name = current_name; | |
396 | } | |
397 | } | |
398 | else | |
80d725d7 | 399 | { |
80d725d7 | 400 | ++current_pic_label_num; |
90ff10b3 | 401 | function_base_func_name = "L_machopic_stub_dummy"; |
80d725d7 | 402 | } |
f212a7d0 | 403 | } |
404 | ||
405 | void | |
406 | machopic_output_function_base_name (FILE *file) | |
407 | { | |
408 | /* If dynamic-no-pic is on, we should not get here. */ | |
409 | gcc_assert (!MACHO_DYNAMIC_NO_PIC_P); | |
410 | ||
411 | update_pic_label_number_if_needed (); | |
412 | fprintf (file, "L%d$pb", current_pic_label_num); | |
413 | } | |
414 | ||
4e2e3c2e | 415 | char curr_picbasename[32]; |
416 | ||
417 | const char * | |
418 | machopic_get_function_picbase (void) | |
419 | { | |
420 | /* If dynamic-no-pic is on, we should not get here. */ | |
421 | gcc_assert (!MACHO_DYNAMIC_NO_PIC_P); | |
422 | ||
423 | update_pic_label_number_if_needed (); | |
424 | snprintf (curr_picbasename, 32, "L%d$pb", current_pic_label_num); | |
425 | return (const char *) curr_picbasename; | |
426 | } | |
427 | ||
f212a7d0 | 428 | bool |
429 | machopic_should_output_picbase_label (void) | |
430 | { | |
431 | update_pic_label_number_if_needed (); | |
432 | ||
433 | if (current_pic_label_num == emitted_pic_label_num) | |
434 | return false; | |
435 | ||
436 | emitted_pic_label_num = current_pic_label_num; | |
437 | return true; | |
80d725d7 | 438 | } |
439 | ||
ab06d2ff | 440 | /* The suffix attached to non-lazy pointer symbols. */ |
441 | #define NON_LAZY_POINTER_SUFFIX "$non_lazy_ptr" | |
442 | /* The suffix attached to stub symbols. */ | |
443 | #define STUB_SUFFIX "$stub" | |
80d725d7 | 444 | |
2ef51f0e | 445 | typedef struct GTY ((for_user)) machopic_indirection |
80d725d7 | 446 | { |
ab06d2ff | 447 | /* The SYMBOL_REF for the entity referenced. */ |
448 | rtx symbol; | |
6d3abfc0 | 449 | /* The name of the stub or non-lazy pointer. */ |
450 | const char * ptr_name; | |
ab06d2ff | 451 | /* True iff this entry is for a stub (as opposed to a non-lazy |
452 | pointer). */ | |
453 | bool stub_p; | |
47ae02b7 | 454 | /* True iff this stub or pointer has been referenced. */ |
ab06d2ff | 455 | bool used; |
456 | } machopic_indirection; | |
457 | ||
b594087e | 458 | struct indirection_hasher : ggc_ptr_hash<machopic_indirection> |
2ef51f0e | 459 | { |
460 | typedef const char *compare_type; | |
461 | static hashval_t hash (machopic_indirection *); | |
462 | static bool equal (machopic_indirection *, const char *); | |
463 | }; | |
464 | ||
ab06d2ff | 465 | /* A table mapping stub names and non-lazy pointer names to |
466 | SYMBOL_REFs for the stubbed-to and pointed-to entities. */ | |
467 | ||
2ef51f0e | 468 | static GTY (()) hash_table<indirection_hasher> *machopic_indirections; |
ab06d2ff | 469 | |
470 | /* Return a hash value for a SLOT in the indirections hash table. */ | |
471 | ||
2ef51f0e | 472 | hashval_t |
473 | indirection_hasher::hash (machopic_indirection *p) | |
ab06d2ff | 474 | { |
6d3abfc0 | 475 | return htab_hash_string (p->ptr_name); |
ab06d2ff | 476 | } |
b40da9a7 | 477 | |
ab06d2ff | 478 | /* Returns true if the KEY is the same as that associated with |
479 | SLOT. */ | |
480 | ||
2ef51f0e | 481 | bool |
482 | indirection_hasher::equal (machopic_indirection *s, const char *k) | |
ab06d2ff | 483 | { |
2ef51f0e | 484 | return strcmp (s->ptr_name, k) == 0; |
ab06d2ff | 485 | } |
80d725d7 | 486 | |
ab06d2ff | 487 | /* Return the name of the non-lazy pointer (if STUB_P is false) or |
4f3ac3c8 | 488 | stub (if STUB_B is true) corresponding to the given name. |
489 | ||
490 | If we have a situation like: | |
491 | ||
492 | global_weak_symbol: | |
493 | .... | |
494 | Lnon_weak_local: | |
495 | .... | |
496 | ||
497 | ld64 will be unable to split this into two atoms (because the "L" makes | |
498 | the second symbol 'invisible'). This means that legitimate direct accesses | |
499 | to the second symbol will appear to be non-allowed direct accesses to an | |
500 | atom of type weak, global which are not allowed. | |
501 | ||
502 | To avoid this, we make the indirections have a leading 'l' (lower-case L) | |
503 | which has a special meaning: linker can see this and use it to determine | |
504 | atoms, but it is not placed into the final symbol table. | |
505 | ||
506 | The implementation here is somewhat heavy-handed in that it will also mark | |
507 | indirections to the __IMPORT,__pointers section the same way which is | |
508 | really unnecessary, since ld64 _can_ split those into atoms as they are | |
509 | fixed size. FIXME: determine if this is a penalty worth extra code to | |
510 | fix. | |
511 | ||
512 | */ | |
8dfaa51b | 513 | |
ab06d2ff | 514 | const char * |
515 | machopic_indirection_name (rtx sym_ref, bool stub_p) | |
516 | { | |
517 | char *buffer; | |
518 | const char *name = XSTR (sym_ref, 0); | |
6d3abfc0 | 519 | size_t namelen = strlen (name); |
ab06d2ff | 520 | machopic_indirection *p; |
524eafbc | 521 | bool needs_quotes; |
522 | const char *suffix; | |
4f3ac3c8 | 523 | char L_or_l = 'L'; |
524eafbc | 524 | const char *prefix = user_label_prefix; |
525 | const char *quote = ""; | |
b359164b | 526 | tree id; |
527 | ||
528 | id = maybe_get_identifier (name); | |
529 | if (id) | |
530 | { | |
531 | tree id_orig = id; | |
532 | ||
533 | while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
534 | id = TREE_CHAIN (id); | |
535 | if (id != id_orig) | |
536 | { | |
537 | name = IDENTIFIER_POINTER (id); | |
538 | namelen = strlen (name); | |
539 | } | |
540 | } | |
b215c058 | 541 | |
524eafbc | 542 | if (name[0] == '*') |
8dfaa51b | 543 | { |
524eafbc | 544 | prefix = ""; |
545 | ++name; | |
546 | --namelen; | |
ab06d2ff | 547 | } |
524eafbc | 548 | |
549 | needs_quotes = name_needs_quotes (name); | |
550 | if (needs_quotes) | |
ab06d2ff | 551 | { |
524eafbc | 552 | quote = "\""; |
8dfaa51b | 553 | } |
554 | ||
524eafbc | 555 | if (stub_p) |
556 | suffix = STUB_SUFFIX; | |
557 | else | |
4f3ac3c8 | 558 | { |
559 | suffix = NON_LAZY_POINTER_SUFFIX; | |
560 | /* Let the linker see this. */ | |
561 | L_or_l = 'l'; | |
562 | } | |
524eafbc | 563 | |
4f3ac3c8 | 564 | buffer = XALLOCAVEC (char, 2 /* strlen ("&L") or ("&l") */ |
524eafbc | 565 | + strlen (prefix) |
566 | + namelen | |
567 | + strlen (suffix) | |
568 | + 2 * strlen (quote) | |
569 | + 1 /* '\0' */); | |
570 | ||
571 | /* Construct the name of the non-lazy pointer or stub. */ | |
4f3ac3c8 | 572 | sprintf (buffer, "&%s%c%s%s%s%s", quote, L_or_l, prefix, name, suffix, quote); |
524eafbc | 573 | |
6d3abfc0 | 574 | if (!machopic_indirections) |
2ef51f0e | 575 | machopic_indirections = hash_table<indirection_hasher>::create_ggc (37); |
b215c058 | 576 | |
2ef51f0e | 577 | machopic_indirection **slot |
578 | = machopic_indirections->find_slot_with_hash (buffer, | |
579 | htab_hash_string (buffer), | |
580 | INSERT); | |
6d3abfc0 | 581 | if (*slot) |
582 | { | |
2ef51f0e | 583 | p = *slot; |
6d3abfc0 | 584 | } |
585 | else | |
ab06d2ff | 586 | { |
25a27413 | 587 | p = ggc_alloc<machopic_indirection> (); |
ab06d2ff | 588 | p->symbol = sym_ref; |
6d3abfc0 | 589 | p->ptr_name = xstrdup (buffer); |
ab06d2ff | 590 | p->stub_p = stub_p; |
6d3abfc0 | 591 | p->used = false; |
592 | *slot = p; | |
ab06d2ff | 593 | } |
b215c058 | 594 | |
6d3abfc0 | 595 | return p->ptr_name; |
80d725d7 | 596 | } |
597 | ||
ab06d2ff | 598 | /* Return the name of the stub for the mcount function. */ |
80d725d7 | 599 | |
ab06d2ff | 600 | const char* |
601 | machopic_mcount_stub_name (void) | |
80d725d7 | 602 | { |
620dd87a | 603 | rtx symbol = gen_rtx_SYMBOL_REF (Pmode, "*mcount"); |
604 | return machopic_indirection_name (symbol, /*stub_p=*/true); | |
80d725d7 | 605 | } |
606 | ||
ab06d2ff | 607 | /* If NAME is the name of a stub or a non-lazy pointer , mark the stub |
608 | or non-lazy pointer as used -- and mark the object to which the | |
609 | pointer/stub refers as used as well, since the pointer/stub will | |
610 | emit a reference to it. */ | |
611 | ||
80d725d7 | 612 | void |
ab06d2ff | 613 | machopic_validate_stub_or_non_lazy_ptr (const char *name) |
80d725d7 | 614 | { |
2ef51f0e | 615 | machopic_indirection *p |
616 | = machopic_indirections->find_with_hash (name, htab_hash_string (name)); | |
6d3abfc0 | 617 | if (p && ! p->used) |
ab06d2ff | 618 | { |
6d3abfc0 | 619 | const char *real_name; |
620 | tree id; | |
b215c058 | 621 | |
6d3abfc0 | 622 | p->used = true; |
623 | ||
09e39ca0 | 624 | /* Do what output_addr_const will do when we actually call it. */ |
625 | if (SYMBOL_REF_DECL (p->symbol)) | |
626 | mark_decl_referenced (SYMBOL_REF_DECL (p->symbol)); | |
627 | ||
628 | real_name = targetm.strip_name_encoding (XSTR (p->symbol, 0)); | |
b215c058 | 629 | |
6d3abfc0 | 630 | id = maybe_get_identifier (real_name); |
631 | if (id) | |
632 | mark_referenced (id); | |
ab06d2ff | 633 | } |
80d725d7 | 634 | } |
635 | ||
636 | /* Transform ORIG, which may be any data source, to the corresponding | |
637 | source using indirections. */ | |
638 | ||
639 | rtx | |
b40da9a7 | 640 | machopic_indirect_data_reference (rtx orig, rtx reg) |
80d725d7 | 641 | { |
642 | rtx ptr_ref = orig; | |
b40da9a7 | 643 | |
80d725d7 | 644 | if (! MACHOPIC_INDIRECT) |
645 | return orig; | |
646 | ||
647 | if (GET_CODE (orig) == SYMBOL_REF) | |
648 | { | |
ab06d2ff | 649 | int defined = machopic_data_defined_p (orig); |
8f74ae7b | 650 | |
651 | if (defined && MACHO_DYNAMIC_NO_PIC_P) | |
652 | { | |
90ff10b3 | 653 | if (DARWIN_PPC) |
654 | { | |
fed0a860 | 655 | /* Create a new register for CSE opportunities. */ |
e1ba4a27 | 656 | rtx hi_reg = (!can_create_pseudo_p () ? reg : gen_reg_rtx (Pmode)); |
fed0a860 | 657 | emit_insn (gen_macho_high (hi_reg, orig)); |
658 | emit_insn (gen_macho_low (reg, hi_reg, orig)); | |
90ff10b3 | 659 | return reg; |
660 | } | |
661 | else if (DARWIN_X86) | |
662 | return orig; | |
663 | else | |
8f74ae7b | 664 | /* some other cpu -- writeme! */ |
27d2baef | 665 | gcc_unreachable (); |
8f74ae7b | 666 | } |
667 | else if (defined) | |
80d725d7 | 668 | { |
90ff10b3 | 669 | rtx offset = NULL; |
670 | if (DARWIN_PPC || HAVE_lo_sum) | |
671 | offset = machopic_gen_offset (orig); | |
80d725d7 | 672 | |
90ff10b3 | 673 | if (DARWIN_PPC) |
674 | { | |
e1ba4a27 | 675 | rtx hi_sum_reg = (!can_create_pseudo_p () |
676 | ? reg | |
677 | : gen_reg_rtx (Pmode)); | |
80d725d7 | 678 | |
27d2baef | 679 | gcc_assert (reg); |
80d725d7 | 680 | |
d1f9b275 | 681 | emit_insn (gen_rtx_SET (hi_sum_reg, |
37ec5024 | 682 | gen_rtx_PLUS (Pmode, pic_offset_table_rtx, |
683 | gen_rtx_HIGH (Pmode, offset)))); | |
d1f9b275 | 684 | emit_insn (gen_rtx_SET (reg, |
3b4a645f | 685 | gen_rtx_LO_SUM (Pmode, hi_sum_reg, |
686 | copy_rtx (offset)))); | |
80d725d7 | 687 | |
688 | orig = reg; | |
90ff10b3 | 689 | } |
690 | else if (HAVE_lo_sum) | |
691 | { | |
27d2baef | 692 | gcc_assert (reg); |
80d725d7 | 693 | |
d1f9b275 | 694 | emit_insn (gen_rtx_SET (reg, gen_rtx_HIGH (Pmode, offset))); |
695 | emit_insn (gen_rtx_SET (reg, gen_rtx_LO_SUM (Pmode, reg, | |
696 | copy_rtx (offset)))); | |
18b42941 | 697 | emit_use (pic_offset_table_rtx); |
80d725d7 | 698 | |
37ec5024 | 699 | orig = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, reg); |
90ff10b3 | 700 | } |
80d725d7 | 701 | return orig; |
702 | } | |
703 | ||
329f67ae | 704 | ptr_ref = (gen_rtx_SYMBOL_REF |
b215c058 | 705 | (Pmode, |
ab06d2ff | 706 | machopic_indirection_name (orig, /*stub_p=*/false))); |
80d725d7 | 707 | |
7c266bb1 | 708 | SYMBOL_REF_DATA (ptr_ref) = SYMBOL_REF_DATA (orig); |
f9226418 | 709 | |
e265a6da | 710 | ptr_ref = gen_const_mem (Pmode, ptr_ref); |
329f67ae | 711 | machopic_define_symbol (ptr_ref); |
80d725d7 | 712 | |
02dcca88 | 713 | if (DARWIN_X86 |
714 | && reg | |
90ff10b3 | 715 | && MACHO_DYNAMIC_NO_PIC_P) |
716 | { | |
d1f9b275 | 717 | emit_insn (gen_rtx_SET (reg, ptr_ref)); |
90ff10b3 | 718 | ptr_ref = reg; |
719 | } | |
720 | ||
80d725d7 | 721 | return ptr_ref; |
722 | } | |
723 | else if (GET_CODE (orig) == CONST) | |
724 | { | |
90ff10b3 | 725 | /* If "(const (plus ...", walk the PLUS and return that result. |
726 | PLUS processing (below) will restore the "(const ..." if | |
727 | appropriate. */ | |
80d725d7 | 728 | if (GET_CODE (XEXP (orig, 0)) == PLUS) |
90ff10b3 | 729 | return machopic_indirect_data_reference (XEXP (orig, 0), reg); |
02dcca88 | 730 | else |
90ff10b3 | 731 | return orig; |
732 | } | |
733 | else if (GET_CODE (orig) == MEM) | |
734 | { | |
02dcca88 | 735 | XEXP (ptr_ref, 0) = |
90ff10b3 | 736 | machopic_indirect_data_reference (XEXP (orig, 0), reg); |
737 | return ptr_ref; | |
738 | } | |
739 | else if (GET_CODE (orig) == PLUS) | |
740 | { | |
741 | rtx base, result; | |
742 | /* When the target is i386, this code prevents crashes due to the | |
743 | compiler's ignorance on how to move the PIC base register to | |
744 | other registers. (The reload phase sometimes introduces such | |
745 | insns.) */ | |
746 | if (GET_CODE (XEXP (orig, 0)) == REG | |
747 | && REGNO (XEXP (orig, 0)) == PIC_OFFSET_TABLE_REGNUM | |
748 | /* Prevent the same register from being erroneously used | |
749 | as both the base and index registers. */ | |
750 | && (DARWIN_X86 && (GET_CODE (XEXP (orig, 1)) == CONST)) | |
751 | && reg) | |
80d725d7 | 752 | { |
90ff10b3 | 753 | emit_move_insn (reg, XEXP (orig, 0)); |
754 | XEXP (ptr_ref, 0) = reg; | |
755 | return ptr_ref; | |
80d725d7 | 756 | } |
80d725d7 | 757 | |
90ff10b3 | 758 | /* Legitimize both operands of the PLUS. */ |
759 | base = machopic_indirect_data_reference (XEXP (orig, 0), reg); | |
760 | orig = machopic_indirect_data_reference (XEXP (orig, 1), | |
761 | (base == reg ? 0 : reg)); | |
762 | if (MACHOPIC_INDIRECT && (GET_CODE (orig) == CONST_INT)) | |
29c05e22 | 763 | result = plus_constant (Pmode, base, INTVAL (orig)); |
80d725d7 | 764 | else |
37ec5024 | 765 | result = gen_rtx_PLUS (Pmode, base, orig); |
80d725d7 | 766 | |
80d725d7 | 767 | if (MACHOPIC_JUST_INDIRECT && GET_CODE (base) == MEM) |
768 | { | |
769 | if (reg) | |
770 | { | |
771 | emit_move_insn (reg, result); | |
772 | result = reg; | |
773 | } | |
774 | else | |
775 | { | |
776 | result = force_reg (GET_MODE (result), result); | |
777 | } | |
778 | } | |
779 | ||
780 | return result; | |
80d725d7 | 781 | } |
782 | return ptr_ref; | |
783 | } | |
784 | ||
80d725d7 | 785 | /* Transform TARGET (a MEM), which is a function call target, to the |
786 | corresponding symbol_stub if necessary. Return a new MEM. */ | |
787 | ||
788 | rtx | |
b40da9a7 | 789 | machopic_indirect_call_target (rtx target) |
80d725d7 | 790 | { |
f7a9de44 | 791 | if (! darwin_picsymbol_stubs) |
3cf7ab3b | 792 | return target; |
793 | ||
80d725d7 | 794 | if (GET_CODE (target) != MEM) |
795 | return target; | |
796 | ||
b215c058 | 797 | if (MACHOPIC_INDIRECT |
ab06d2ff | 798 | && GET_CODE (XEXP (target, 0)) == SYMBOL_REF |
799 | && !(SYMBOL_REF_FLAGS (XEXP (target, 0)) | |
800 | & MACHO_SYMBOL_FLAG_DEFINED)) | |
b40da9a7 | 801 | { |
ab06d2ff | 802 | rtx sym_ref = XEXP (target, 0); |
b215c058 | 803 | const char *stub_name = machopic_indirection_name (sym_ref, |
ab06d2ff | 804 | /*stub_p=*/true); |
3754d046 | 805 | machine_mode mode = GET_MODE (sym_ref); |
b215c058 | 806 | |
ab06d2ff | 807 | XEXP (target, 0) = gen_rtx_SYMBOL_REF (mode, stub_name); |
7c266bb1 | 808 | SYMBOL_REF_DATA (XEXP (target, 0)) = SYMBOL_REF_DATA (sym_ref); |
b04fab2a | 809 | MEM_READONLY_P (target) = 1; |
e265a6da | 810 | MEM_NOTRAP_P (target) = 1; |
80d725d7 | 811 | } |
812 | ||
813 | return target; | |
814 | } | |
815 | ||
816 | rtx | |
3754d046 | 817 | machopic_legitimize_pic_address (rtx orig, machine_mode mode, rtx reg) |
80d725d7 | 818 | { |
819 | rtx pic_ref = orig; | |
820 | ||
8f74ae7b | 821 | if (! MACHOPIC_INDIRECT) |
80d725d7 | 822 | return orig; |
823 | ||
824 | /* First handle a simple SYMBOL_REF or LABEL_REF */ | |
825 | if (GET_CODE (orig) == LABEL_REF | |
2c568282 | 826 | || GET_CODE (orig) == SYMBOL_REF) |
80d725d7 | 827 | { |
828 | /* addr(foo) = &func+(foo-func) */ | |
80d725d7 | 829 | orig = machopic_indirect_data_reference (orig, reg); |
830 | ||
b40da9a7 | 831 | if (GET_CODE (orig) == PLUS |
80d725d7 | 832 | && GET_CODE (XEXP (orig, 0)) == REG) |
833 | { | |
834 | if (reg == 0) | |
835 | return force_reg (mode, orig); | |
836 | ||
837 | emit_move_insn (reg, orig); | |
838 | return reg; | |
b40da9a7 | 839 | } |
80d725d7 | 840 | |
80d725d7 | 841 | if (GET_CODE (orig) == MEM) |
842 | { | |
843 | if (reg == 0) | |
844 | { | |
27d2baef | 845 | gcc_assert (!reload_in_progress); |
846 | reg = gen_reg_rtx (Pmode); | |
80d725d7 | 847 | } |
b40da9a7 | 848 | |
90ff10b3 | 849 | #if HAVE_lo_sum |
8f74ae7b | 850 | if (MACHO_DYNAMIC_NO_PIC_P |
851 | && (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
852 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF)) | |
853 | { | |
854 | #if defined (TARGET_TOC) /* ppc */ | |
e1ba4a27 | 855 | rtx temp_reg = (!can_create_pseudo_p () |
856 | ? reg : | |
857 | gen_reg_rtx (Pmode)); | |
8f74ae7b | 858 | rtx asym = XEXP (orig, 0); |
859 | rtx mem; | |
860 | ||
301a5e52 | 861 | emit_insn (gen_macho_high (temp_reg, asym)); |
e265a6da | 862 | mem = gen_const_mem (GET_MODE (orig), |
3b4a645f | 863 | gen_rtx_LO_SUM (Pmode, temp_reg, |
864 | copy_rtx (asym))); | |
d1f9b275 | 865 | emit_insn (gen_rtx_SET (reg, mem)); |
8f74ae7b | 866 | #else |
c4f8e01f | 867 | /* Some other CPU -- WriteMe! but right now there are no other |
868 | platforms that can use dynamic-no-pic */ | |
27d2baef | 869 | gcc_unreachable (); |
8f74ae7b | 870 | #endif |
871 | pic_ref = reg; | |
872 | } | |
873 | else | |
b40da9a7 | 874 | if (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF |
80d725d7 | 875 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) |
876 | { | |
a914e728 | 877 | rtx offset = machopic_gen_offset (XEXP (orig, 0)); |
80d725d7 | 878 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
879 | /* Generating a new reg may expose opportunities for | |
880 | common subexpression elimination. */ | |
e1ba4a27 | 881 | rtx hi_sum_reg = (!can_create_pseudo_p () |
882 | ? reg | |
883 | : gen_reg_rtx (Pmode)); | |
37ec5024 | 884 | rtx mem; |
37ec5024 | 885 | rtx sum; |
b215c058 | 886 | |
37ec5024 | 887 | sum = gen_rtx_HIGH (Pmode, offset); |
888 | if (! MACHO_DYNAMIC_NO_PIC_P) | |
889 | sum = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, sum); | |
80d725d7 | 890 | |
d1f9b275 | 891 | emit_insn (gen_rtx_SET (hi_sum_reg, sum)); |
37ec5024 | 892 | |
e265a6da | 893 | mem = gen_const_mem (GET_MODE (orig), |
b215c058 | 894 | gen_rtx_LO_SUM (Pmode, |
3b4a645f | 895 | hi_sum_reg, |
896 | copy_rtx (offset))); | |
26cd1198 | 897 | rtx_insn *insn = emit_insn (gen_rtx_SET (reg, mem)); |
24153880 | 898 | set_unique_reg_note (insn, REG_EQUAL, pic_ref); |
37ec5024 | 899 | |
900 | pic_ref = reg; | |
80d725d7 | 901 | #else |
18b42941 | 902 | emit_use (gen_rtx_REG (Pmode, PIC_OFFSET_TABLE_REGNUM)); |
37ec5024 | 903 | |
d1f9b275 | 904 | emit_insn (gen_rtx_SET (reg, |
37ec5024 | 905 | gen_rtx_HIGH (Pmode, |
b215c058 | 906 | gen_rtx_CONST (Pmode, |
37ec5024 | 907 | offset)))); |
d1f9b275 | 908 | emit_insn (gen_rtx_SET (reg, |
37ec5024 | 909 | gen_rtx_LO_SUM (Pmode, reg, |
3b4a645f | 910 | gen_rtx_CONST (Pmode, |
911 | copy_rtx (offset))))); | |
37ec5024 | 912 | pic_ref = gen_rtx_PLUS (Pmode, |
913 | pic_offset_table_rtx, reg); | |
80d725d7 | 914 | #endif |
915 | } | |
916 | else | |
917 | #endif /* HAVE_lo_sum */ | |
918 | { | |
919 | rtx pic = pic_offset_table_rtx; | |
920 | if (GET_CODE (pic) != REG) | |
921 | { | |
922 | emit_move_insn (reg, pic); | |
923 | pic = reg; | |
924 | } | |
925 | #if 0 | |
18b42941 | 926 | emit_use (gen_rtx_REG (Pmode, PIC_OFFSET_TABLE_REGNUM)); |
80d725d7 | 927 | #endif |
928 | ||
3e111a71 | 929 | if (reload_in_progress) |
3072d30e | 930 | df_set_regs_ever_live (REGNO (pic), true); |
b06a3cc3 | 931 | pic_ref = gen_rtx_PLUS (Pmode, pic, |
a914e728 | 932 | machopic_gen_offset (XEXP (orig, 0))); |
80d725d7 | 933 | } |
b40da9a7 | 934 | |
80d725d7 | 935 | #if !defined (TARGET_TOC) |
80d725d7 | 936 | emit_move_insn (reg, pic_ref); |
e265a6da | 937 | pic_ref = gen_const_mem (GET_MODE (orig), reg); |
7ba97778 | 938 | #endif |
80d725d7 | 939 | } |
940 | else | |
941 | { | |
942 | ||
90ff10b3 | 943 | #if HAVE_lo_sum |
b40da9a7 | 944 | if (GET_CODE (orig) == SYMBOL_REF |
80d725d7 | 945 | || GET_CODE (orig) == LABEL_REF) |
946 | { | |
a914e728 | 947 | rtx offset = machopic_gen_offset (orig); |
80d725d7 | 948 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
949 | rtx hi_sum_reg; | |
950 | ||
951 | if (reg == 0) | |
952 | { | |
27d2baef | 953 | gcc_assert (!reload_in_progress); |
954 | reg = gen_reg_rtx (Pmode); | |
80d725d7 | 955 | } |
b40da9a7 | 956 | |
80d725d7 | 957 | hi_sum_reg = reg; |
958 | ||
d1f9b275 | 959 | emit_insn (gen_rtx_SET (hi_sum_reg, |
37ec5024 | 960 | (MACHO_DYNAMIC_NO_PIC_P) |
961 | ? gen_rtx_HIGH (Pmode, offset) | |
962 | : gen_rtx_PLUS (Pmode, | |
963 | pic_offset_table_rtx, | |
b215c058 | 964 | gen_rtx_HIGH (Pmode, |
37ec5024 | 965 | offset)))); |
d1f9b275 | 966 | emit_insn (gen_rtx_SET (reg, |
37ec5024 | 967 | gen_rtx_LO_SUM (Pmode, |
3b4a645f | 968 | hi_sum_reg, |
969 | copy_rtx (offset)))); | |
80d725d7 | 970 | pic_ref = reg; |
971 | #else | |
d1f9b275 | 972 | emit_insn (gen_rtx_SET (reg, gen_rtx_HIGH (Pmode, offset))); |
973 | emit_insn (gen_rtx_SET (reg, | |
3b4a645f | 974 | gen_rtx_LO_SUM (Pmode, reg, |
975 | copy_rtx (offset)))); | |
37ec5024 | 976 | pic_ref = gen_rtx_PLUS (Pmode, |
977 | pic_offset_table_rtx, reg); | |
80d725d7 | 978 | #endif |
979 | } | |
980 | else | |
981 | #endif /* HAVE_lo_sum */ | |
982 | { | |
7a5893fc | 983 | if (REG_P (orig) |
984 | || GET_CODE (orig) == SUBREG) | |
80d725d7 | 985 | { |
986 | return orig; | |
987 | } | |
988 | else | |
989 | { | |
990 | rtx pic = pic_offset_table_rtx; | |
991 | if (GET_CODE (pic) != REG) | |
992 | { | |
993 | emit_move_insn (reg, pic); | |
994 | pic = reg; | |
995 | } | |
996 | #if 0 | |
18b42941 | 997 | emit_use (pic_offset_table_rtx); |
80d725d7 | 998 | #endif |
3e111a71 | 999 | if (reload_in_progress) |
3072d30e | 1000 | df_set_regs_ever_live (REGNO (pic), true); |
37ec5024 | 1001 | pic_ref = gen_rtx_PLUS (Pmode, |
1002 | pic, | |
a914e728 | 1003 | machopic_gen_offset (orig)); |
80d725d7 | 1004 | } |
1005 | } | |
1006 | } | |
1007 | ||
80d725d7 | 1008 | if (GET_CODE (pic_ref) != REG) |
1009 | { | |
1010 | if (reg != 0) | |
1011 | { | |
1012 | emit_move_insn (reg, pic_ref); | |
1013 | return reg; | |
1014 | } | |
1015 | else | |
1016 | { | |
1017 | return force_reg (mode, pic_ref); | |
1018 | } | |
1019 | } | |
1020 | else | |
1021 | { | |
1022 | return pic_ref; | |
1023 | } | |
1024 | } | |
80d725d7 | 1025 | else if (GET_CODE (orig) == PLUS |
1026 | && (GET_CODE (XEXP (orig, 0)) == MEM | |
1027 | || GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
1028 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) | |
1029 | && XEXP (orig, 0) != pic_offset_table_rtx | |
1030 | && GET_CODE (XEXP (orig, 1)) != REG) | |
b40da9a7 | 1031 | |
80d725d7 | 1032 | { |
1033 | rtx base; | |
1034 | int is_complex = (GET_CODE (XEXP (orig, 0)) == MEM); | |
1035 | ||
1036 | base = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
1037 | orig = machopic_legitimize_pic_address (XEXP (orig, 1), | |
1038 | Pmode, (base == reg ? 0 : reg)); | |
1039 | if (GET_CODE (orig) == CONST_INT) | |
1040 | { | |
29c05e22 | 1041 | pic_ref = plus_constant (Pmode, base, INTVAL (orig)); |
80d725d7 | 1042 | is_complex = 1; |
1043 | } | |
1044 | else | |
37ec5024 | 1045 | pic_ref = gen_rtx_PLUS (Pmode, base, orig); |
80d725d7 | 1046 | |
80d725d7 | 1047 | if (reg && is_complex) |
1048 | { | |
1049 | emit_move_insn (reg, pic_ref); | |
1050 | pic_ref = reg; | |
1051 | } | |
1052 | /* Likewise, should we set special REG_NOTEs here? */ | |
1053 | } | |
80d725d7 | 1054 | else if (GET_CODE (orig) == CONST) |
1055 | { | |
1056 | return machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
1057 | } | |
80d725d7 | 1058 | else if (GET_CODE (orig) == MEM |
1059 | && GET_CODE (XEXP (orig, 0)) == SYMBOL_REF) | |
1060 | { | |
1061 | rtx addr = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
b04fab2a | 1062 | addr = replace_equiv_address (orig, addr); |
80d725d7 | 1063 | emit_move_insn (reg, addr); |
1064 | pic_ref = reg; | |
1065 | } | |
1066 | ||
1067 | return pic_ref; | |
1068 | } | |
1069 | ||
ab06d2ff | 1070 | /* Output the stub or non-lazy pointer in *SLOT, if it has been used. |
1071 | DATA is the FILE* for assembly output. Called from | |
1072 | htab_traverse. */ | |
80d725d7 | 1073 | |
2ef51f0e | 1074 | int |
1075 | machopic_output_indirection (machopic_indirection **slot, FILE *asm_out_file) | |
80d725d7 | 1076 | { |
2ef51f0e | 1077 | machopic_indirection *p = *slot; |
ab06d2ff | 1078 | rtx symbol; |
1079 | const char *sym_name; | |
1080 | const char *ptr_name; | |
b215c058 | 1081 | |
ab06d2ff | 1082 | if (!p->used) |
1083 | return 1; | |
80d725d7 | 1084 | |
ab06d2ff | 1085 | symbol = p->symbol; |
1086 | sym_name = XSTR (symbol, 0); | |
6d3abfc0 | 1087 | ptr_name = p->ptr_name; |
b215c058 | 1088 | |
ab06d2ff | 1089 | if (p->stub_p) |
80d725d7 | 1090 | { |
80d725d7 | 1091 | char *sym; |
1092 | char *stub; | |
b359164b | 1093 | tree id; |
1094 | ||
1095 | id = maybe_get_identifier (sym_name); | |
1096 | if (id) | |
1097 | { | |
1098 | tree id_orig = id; | |
1099 | ||
1100 | while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
1101 | id = TREE_CHAIN (id); | |
1102 | if (id != id_orig) | |
1103 | sym_name = IDENTIFIER_POINTER (id); | |
1104 | } | |
80d725d7 | 1105 | |
225ab426 | 1106 | sym = XALLOCAVEC (char, strlen (sym_name) + 2); |
80d725d7 | 1107 | if (sym_name[0] == '*' || sym_name[0] == '&') |
1108 | strcpy (sym, sym_name + 1); | |
1109 | else if (sym_name[0] == '-' || sym_name[0] == '+') | |
b40da9a7 | 1110 | strcpy (sym, sym_name); |
80d725d7 | 1111 | else |
e9764bbb | 1112 | sprintf (sym, "%s%s", user_label_prefix, sym_name); |
80d725d7 | 1113 | |
225ab426 | 1114 | stub = XALLOCAVEC (char, strlen (ptr_name) + 2); |
ab06d2ff | 1115 | if (ptr_name[0] == '*' || ptr_name[0] == '&') |
1116 | strcpy (stub, ptr_name + 1); | |
80d725d7 | 1117 | else |
ab06d2ff | 1118 | sprintf (stub, "%s%s", user_label_prefix, ptr_name); |
80d725d7 | 1119 | |
09e39ca0 | 1120 | machopic_output_stub (asm_out_file, sym, stub); |
80d725d7 | 1121 | } |
f0ed0e8a | 1122 | else if (! indirect_data (symbol) |
8d806159 | 1123 | && (machopic_symbol_defined_p (symbol) |
1124 | || SYMBOL_REF_LOCAL_P (symbol))) | |
80d725d7 | 1125 | { |
2f14b1f9 | 1126 | switch_to_section (data_section); |
ab06d2ff | 1127 | assemble_align (GET_MODE_ALIGNMENT (Pmode)); |
427eb138 | 1128 | assemble_label (asm_out_file, ptr_name); |
ab06d2ff | 1129 | assemble_integer (gen_rtx_SYMBOL_REF (Pmode, sym_name), |
1130 | GET_MODE_SIZE (Pmode), | |
1131 | GET_MODE_ALIGNMENT (Pmode), 1); | |
80d725d7 | 1132 | } |
ab06d2ff | 1133 | else |
1134 | { | |
f0ed0e8a | 1135 | rtx init = const0_rtx; |
1136 | ||
92e4ba7d | 1137 | switch_to_section (darwin_sections[machopic_nl_symbol_ptr_section]); |
cd186228 | 1138 | |
1139 | /* Mach-O symbols are passed around in code through indirect | |
1140 | references and the original symbol_ref hasn't passed through | |
1141 | the generic handling and reference-catching in | |
1142 | output_operand, so we need to manually mark weak references | |
1143 | as such. */ | |
1144 | if (SYMBOL_REF_WEAK (symbol)) | |
1145 | { | |
1146 | tree decl = SYMBOL_REF_DECL (symbol); | |
1147 | gcc_assert (DECL_P (decl)); | |
1148 | ||
1149 | if (decl != NULL_TREE | |
1150 | && DECL_EXTERNAL (decl) && TREE_PUBLIC (decl) | |
1151 | /* Handle only actual external-only definitions, not | |
1152 | e.g. extern inline code or variables for which | |
1153 | storage has been allocated. */ | |
1154 | && !TREE_STATIC (decl)) | |
1155 | { | |
1156 | fputs ("\t.weak_reference ", asm_out_file); | |
1157 | assemble_name (asm_out_file, sym_name); | |
1158 | fputc ('\n', asm_out_file); | |
1159 | } | |
1160 | } | |
1161 | ||
ab06d2ff | 1162 | assemble_name (asm_out_file, ptr_name); |
1163 | fprintf (asm_out_file, ":\n"); | |
b215c058 | 1164 | |
ab06d2ff | 1165 | fprintf (asm_out_file, "\t.indirect_symbol "); |
1166 | assemble_name (asm_out_file, sym_name); | |
1167 | fprintf (asm_out_file, "\n"); | |
b215c058 | 1168 | |
f0ed0e8a | 1169 | /* Variables that are marked with MACHO_SYMBOL_STATIC need to |
1170 | have their symbol name instead of 0 in the second entry of | |
1171 | the non-lazy symbol pointer data structure when they are | |
1172 | defined. This allows the runtime to rebind newer instances | |
1173 | of the translation unit with the original instance of the | |
d188633a | 1174 | symbol. */ |
f0ed0e8a | 1175 | |
1176 | if ((SYMBOL_REF_FLAGS (symbol) & MACHO_SYMBOL_STATIC) | |
1177 | && machopic_symbol_defined_p (symbol)) | |
1178 | init = gen_rtx_SYMBOL_REF (Pmode, sym_name); | |
1179 | ||
1180 | assemble_integer (init, GET_MODE_SIZE (Pmode), | |
ab06d2ff | 1181 | GET_MODE_ALIGNMENT (Pmode), 1); |
1182 | } | |
b215c058 | 1183 | |
ab06d2ff | 1184 | return 1; |
1185 | } | |
1186 | ||
1187 | void | |
1188 | machopic_finish (FILE *asm_out_file) | |
1189 | { | |
1190 | if (machopic_indirections) | |
2ef51f0e | 1191 | machopic_indirections |
1192 | ->traverse_noresize<FILE *, machopic_output_indirection> (asm_out_file); | |
80d725d7 | 1193 | } |
1194 | ||
b40da9a7 | 1195 | int |
1196 | machopic_operand_p (rtx op) | |
80d725d7 | 1197 | { |
1198 | if (MACHOPIC_JUST_INDIRECT) | |
a914e728 | 1199 | return (GET_CODE (op) == SYMBOL_REF |
1200 | && machopic_symbol_defined_p (op)); | |
1201 | else | |
1202 | return (GET_CODE (op) == CONST | |
1203 | && GET_CODE (XEXP (op, 0)) == UNSPEC | |
1204 | && XINT (XEXP (op, 0), 1) == UNSPEC_MACHOPIC_OFFSET); | |
80d725d7 | 1205 | } |
8dfaa51b | 1206 | |
1207 | /* This function records whether a given name corresponds to a defined | |
1208 | or undefined function or variable, for machopic_classify_ident to | |
1209 | use later. */ | |
1210 | ||
1211 | void | |
b40da9a7 | 1212 | darwin_encode_section_info (tree decl, rtx rtl, int first ATTRIBUTE_UNUSED) |
8dfaa51b | 1213 | { |
5a121a91 | 1214 | rtx sym_ref; |
8dfaa51b | 1215 | |
9af9a32c | 1216 | /* Do the standard encoding things first. */ |
1217 | default_encode_section_info (decl, rtl, first); | |
1218 | ||
ab06d2ff | 1219 | if (TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL) |
1220 | return; | |
9af9a32c | 1221 | |
ab06d2ff | 1222 | sym_ref = XEXP (rtl, 0); |
1223 | if (TREE_CODE (decl) == VAR_DECL) | |
1224 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_VARIABLE; | |
1225 | ||
1226 | if (!DECL_EXTERNAL (decl) | |
1dc74225 | 1227 | && (!TREE_PUBLIC (decl) || !DECL_WEAK (decl)) |
0a3ecdc1 | 1228 | && ! lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)) |
8dfaa51b | 1229 | && ((TREE_STATIC (decl) |
1230 | && (!DECL_COMMON (decl) || !TREE_PUBLIC (decl))) | |
2f4fae92 | 1231 | || (!DECL_COMMON (decl) && DECL_INITIAL (decl) |
fd419242 | 1232 | && DECL_INITIAL (decl) != error_mark_node))) |
ab06d2ff | 1233 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; |
f0ed0e8a | 1234 | |
d188633a | 1235 | if (! TREE_PUBLIC (decl)) |
f0ed0e8a | 1236 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_STATIC; |
e479d0de | 1237 | } |
01d15dc5 | 1238 | |
9423c9b7 | 1239 | void |
1240 | darwin_mark_decl_preserved (const char *name) | |
1241 | { | |
565f322f | 1242 | /* Actually we shouldn't mark any local symbol this way, but for now |
1243 | this only happens with ObjC meta-data. */ | |
1244 | if (darwin_label_is_anonymous_local_objc_name (name)) | |
1245 | return; | |
1246 | ||
163c9fff | 1247 | fprintf (asm_out_file, "\t.no_dead_strip "); |
9423c9b7 | 1248 | assemble_name (asm_out_file, name); |
1249 | fputc ('\n', asm_out_file); | |
1250 | } | |
1251 | ||
50e6797e | 1252 | static section * |
f199808c | 1253 | darwin_rodata_section (int use_coal, bool zsize) |
50e6797e | 1254 | { |
f199808c | 1255 | return (use_coal |
50e6797e | 1256 | ? darwin_sections[const_coal_section] |
8e79e9d4 | 1257 | : (zsize ? darwin_sections[zobj_const_section] |
1258 | : darwin_sections[const_section])); | |
50e6797e | 1259 | } |
b40da9a7 | 1260 | |
50e6797e | 1261 | static section * |
1262 | darwin_mergeable_string_section (tree exp, | |
1263 | unsigned HOST_WIDE_INT align) | |
1264 | { | |
02dcca88 | 1265 | /* Darwin's ld expects to see non-writable string literals in the .cstring |
1266 | section. Later versions of ld check and complain when CFStrings are | |
1991f4fd | 1267 | enabled. Therefore we shall force the strings into .cstring since we |
1268 | don't support writable ones anyway. */ | |
1269 | if ((darwin_constant_cfstrings || flag_merge_constants) | |
50e6797e | 1270 | && TREE_CODE (exp) == STRING_CST |
1271 | && TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE | |
1272 | && align <= 256 | |
a7df40d7 | 1273 | && (int_size_in_bytes (TREE_TYPE (exp)) |
1274 | == TREE_STRING_LENGTH (exp)) | |
b40da9a7 | 1275 | && ((size_t) TREE_STRING_LENGTH (exp) |
a814bad5 | 1276 | == strlen (TREE_STRING_POINTER (exp)) + 1)) |
92e4ba7d | 1277 | return darwin_sections[cstring_section]; |
50e6797e | 1278 | |
8e79e9d4 | 1279 | if (DARWIN_SECTION_ANCHORS && flag_section_anchors |
1280 | && TREE_CODE (exp) == STRING_CST | |
1281 | && TREE_STRING_LENGTH (exp) == 0) | |
1282 | return darwin_sections[zobj_const_section]; | |
1283 | ||
50e6797e | 1284 | return readonly_data_section; |
1285 | } | |
1286 | ||
4be92808 | 1287 | #ifndef HAVE_GAS_LITERAL16 |
1288 | #define HAVE_GAS_LITERAL16 0 | |
1289 | #endif | |
1290 | ||
50e6797e | 1291 | static section * |
1292 | darwin_mergeable_constant_section (tree exp, | |
8e79e9d4 | 1293 | unsigned HOST_WIDE_INT align, |
1294 | bool zsize) | |
50e6797e | 1295 | { |
3754d046 | 1296 | machine_mode mode = DECL_MODE (exp); |
50e6797e | 1297 | unsigned int modesize = GET_MODE_BITSIZE (mode); |
1298 | ||
02dcca88 | 1299 | if (DARWIN_SECTION_ANCHORS |
1300 | && flag_section_anchors | |
8e79e9d4 | 1301 | && zsize) |
1302 | return darwin_sections[zobj_const_section]; | |
1303 | ||
50e6797e | 1304 | if (flag_merge_constants |
1305 | && mode != VOIDmode | |
1306 | && mode != BLKmode | |
1307 | && modesize <= align | |
1308 | && align >= 8 | |
1309 | && align <= 256 | |
1310 | && (align & (align -1)) == 0) | |
52470889 | 1311 | { |
853b103d | 1312 | tree size = TYPE_SIZE_UNIT (TREE_TYPE (exp)); |
52470889 | 1313 | |
e913b5cd | 1314 | if (TREE_CODE (size) == INTEGER_CST) |
1315 | { | |
e3d0f65c | 1316 | if (wi::to_wide (size) == 4) |
e913b5cd | 1317 | return darwin_sections[literal4_section]; |
e3d0f65c | 1318 | else if (wi::to_wide (size) == 8) |
e913b5cd | 1319 | return darwin_sections[literal8_section]; |
1320 | else if (HAVE_GAS_LITERAL16 | |
1321 | && TARGET_64BIT | |
e3d0f65c | 1322 | && wi::to_wide (size) == 16) |
e913b5cd | 1323 | return darwin_sections[literal16_section]; |
1324 | } | |
50e6797e | 1325 | } |
1326 | ||
1327 | return readonly_data_section; | |
1328 | } | |
1329 | ||
e3ef604c | 1330 | section * |
1331 | darwin_tm_clone_table_section (void) | |
1332 | { | |
1333 | return get_named_section (NULL, | |
1334 | "__DATA,__tm_clone_table,regular,no_dead_strip", | |
1335 | 3); | |
1336 | } | |
1337 | ||
0b769e4a | 1338 | int |
1339 | machopic_reloc_rw_mask (void) | |
1340 | { | |
1341 | return MACHOPIC_INDIRECT ? 3 : 0; | |
1342 | } | |
1343 | ||
267785bc | 1344 | /* We have to deal with ObjC/C++ metadata section placement in the common |
1345 | code, since it will also be called from LTO. | |
02dcca88 | 1346 | |
267785bc | 1347 | Return metadata attributes, if present (searching for ABI=2 first) |
1348 | Return NULL_TREE if no such attributes are found. */ | |
1349 | ||
1350 | static tree | |
1351 | is_objc_metadata (tree decl) | |
1352 | { | |
02dcca88 | 1353 | if (DECL_P (decl) |
267785bc | 1354 | && (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == CONST_DECL) |
1355 | && DECL_ATTRIBUTES (decl)) | |
1356 | { | |
1357 | tree meta = lookup_attribute ("OBJC2META", DECL_ATTRIBUTES (decl)); | |
1358 | if (meta) | |
1359 | return meta; | |
1360 | meta = lookup_attribute ("OBJC1META", DECL_ATTRIBUTES (decl)); | |
1361 | if (meta) | |
1362 | return meta; | |
1363 | } | |
1364 | return NULL_TREE; | |
1365 | } | |
1366 | ||
236ce1d1 | 1367 | static int classes_seen; |
1368 | static int objc_metadata_seen; | |
1369 | ||
267785bc | 1370 | /* Return the section required for Objective C ABI 2 metadata. */ |
1371 | static section * | |
1372 | darwin_objc2_section (tree decl ATTRIBUTE_UNUSED, tree meta, section * base) | |
1373 | { | |
1374 | const char *p; | |
1375 | tree ident = TREE_VALUE (meta); | |
1376 | gcc_assert (TREE_CODE (ident) == IDENTIFIER_NODE); | |
1377 | p = IDENTIFIER_POINTER (ident); | |
1378 | ||
236ce1d1 | 1379 | gcc_checking_assert (flag_next_runtime == 1 && flag_objc_abi == 2); |
267785bc | 1380 | |
236ce1d1 | 1381 | objc_metadata_seen = 1; |
267785bc | 1382 | |
1383 | if (base == data_section) | |
1384 | base = darwin_sections[objc2_metadata_section]; | |
1385 | ||
1386 | /* Most of the OBJC2 META-data end up in the base section, so check it | |
1387 | first. */ | |
1388 | if (!strncmp (p, "V2_BASE", 7)) | |
1389 | return base; | |
1390 | else if (!strncmp (p, "V2_STRG", 7)) | |
1391 | return darwin_sections[cstring_section]; | |
1392 | ||
1393 | else if (!strncmp (p, "G2_META", 7) || !strncmp (p, "G2_CLAS", 7)) | |
1394 | return darwin_sections[objc2_classdefs_section]; | |
1395 | else if (!strncmp (p, "V2_MREF", 7)) | |
1396 | return darwin_sections[objc2_message_refs_section]; | |
1397 | else if (!strncmp (p, "V2_CLRF", 7)) | |
1398 | return darwin_sections[objc2_classrefs_section]; | |
1399 | else if (!strncmp (p, "V2_SURF", 7)) | |
1400 | return darwin_sections[objc2_super_classrefs_section]; | |
1401 | else if (!strncmp (p, "V2_NLCL", 7)) | |
1402 | return darwin_sections[objc2_nonlazy_class_section]; | |
1403 | else if (!strncmp (p, "V2_CLAB", 7)) | |
236ce1d1 | 1404 | { |
1405 | classes_seen = 1; | |
1406 | return darwin_sections[objc2_classlist_section]; | |
1407 | } | |
267785bc | 1408 | else if (!strncmp (p, "V2_SRFS", 7)) |
1409 | return darwin_sections[objc2_selector_refs_section]; | |
1410 | else if (!strncmp (p, "V2_NLCA", 7)) | |
1411 | return darwin_sections[objc2_nonlazy_category_section]; | |
1412 | else if (!strncmp (p, "V2_CALA", 7)) | |
1413 | return darwin_sections[objc2_categorylist_section]; | |
1414 | ||
1415 | else if (!strncmp (p, "V2_PLST", 7)) | |
1416 | return darwin_sections[objc2_protocollist_section]; | |
1417 | else if (!strncmp (p, "V2_PRFS", 7)) | |
1418 | return darwin_sections[objc2_protocolrefs_section]; | |
1419 | ||
1420 | else if (!strncmp (p, "V2_INFO", 7)) | |
1421 | return darwin_sections[objc2_image_info_section]; | |
1422 | ||
1423 | else if (!strncmp (p, "V2_EHTY", 7)) | |
f199808c | 1424 | return ld_uses_coal_sects ? darwin_sections[data_coal_section] |
1425 | : data_section; | |
267785bc | 1426 | |
1427 | else if (!strncmp (p, "V2_CSTR", 7)) | |
1428 | return darwin_sections[objc2_constant_string_object_section]; | |
1429 | ||
1430 | /* Not recognized, default. */ | |
1431 | return base; | |
1432 | } | |
1433 | ||
1434 | /* Return the section required for Objective C ABI 0/1 metadata. */ | |
1435 | static section * | |
1436 | darwin_objc1_section (tree decl ATTRIBUTE_UNUSED, tree meta, section * base) | |
1437 | { | |
1438 | const char *p; | |
1439 | tree ident = TREE_VALUE (meta); | |
1440 | gcc_assert (TREE_CODE (ident) == IDENTIFIER_NODE); | |
1441 | p = IDENTIFIER_POINTER (ident); | |
1442 | ||
236ce1d1 | 1443 | gcc_checking_assert (flag_next_runtime == 1 && flag_objc_abi < 2); |
1444 | ||
1445 | objc_metadata_seen = 1; | |
267785bc | 1446 | |
1447 | /* String sections first, cos there are lots of strings. */ | |
1448 | if (!strncmp (p, "V1_STRG", 7)) | |
1449 | return darwin_sections[cstring_section]; | |
1450 | else if (!strncmp (p, "V1_CLSN", 7)) | |
1451 | return darwin_sections[objc_class_names_section]; | |
1452 | else if (!strncmp (p, "V1_METN", 7)) | |
1453 | return darwin_sections[objc_meth_var_names_section]; | |
1454 | else if (!strncmp (p, "V1_METT", 7)) | |
1455 | return darwin_sections[objc_meth_var_types_section]; | |
1456 | ||
1457 | else if (!strncmp (p, "V1_CLAS", 7)) | |
236ce1d1 | 1458 | { |
1459 | classes_seen = 1; | |
1460 | return darwin_sections[objc_class_section]; | |
1461 | } | |
267785bc | 1462 | else if (!strncmp (p, "V1_META", 7)) |
1463 | return darwin_sections[objc_meta_class_section]; | |
1464 | else if (!strncmp (p, "V1_CATG", 7)) | |
1465 | return darwin_sections[objc_category_section]; | |
1466 | else if (!strncmp (p, "V1_PROT", 7)) | |
1467 | return darwin_sections[objc_protocol_section]; | |
1468 | ||
1469 | else if (!strncmp (p, "V1_CLCV", 7)) | |
1470 | return darwin_sections[objc_class_vars_section]; | |
1471 | else if (!strncmp (p, "V1_CLIV", 7)) | |
1472 | return darwin_sections[objc_instance_vars_section]; | |
1473 | ||
1474 | else if (!strncmp (p, "V1_CLCM", 7)) | |
1475 | return darwin_sections[objc_cls_meth_section]; | |
1476 | else if (!strncmp (p, "V1_CLIM", 7)) | |
1477 | return darwin_sections[objc_inst_meth_section]; | |
1478 | else if (!strncmp (p, "V1_CACM", 7)) | |
1479 | return darwin_sections[objc_cat_cls_meth_section]; | |
1480 | else if (!strncmp (p, "V1_CAIM", 7)) | |
1481 | return darwin_sections[objc_cat_inst_meth_section]; | |
1482 | else if (!strncmp (p, "V1_PNSM", 7)) | |
1483 | return darwin_sections[objc_cat_inst_meth_section]; | |
1484 | else if (!strncmp (p, "V1_PCLM", 7)) | |
1485 | return darwin_sections[objc_cat_cls_meth_section]; | |
1486 | ||
1487 | else if (!strncmp (p, "V1_CLPR", 7)) | |
1488 | return darwin_sections[objc_cat_cls_meth_section]; | |
1489 | else if (!strncmp (p, "V1_CAPR", 7)) | |
1490 | return darwin_sections[objc_category_section]; /* ??? CHECK me. */ | |
1491 | ||
1492 | else if (!strncmp (p, "V1_PRFS", 7)) | |
1493 | return darwin_sections[objc_cat_cls_meth_section]; | |
1494 | else if (!strncmp (p, "V1_CLRF", 7)) | |
1495 | return darwin_sections[objc_cls_refs_section]; | |
1496 | else if (!strncmp (p, "V1_SRFS", 7)) | |
1497 | return darwin_sections[objc_selector_refs_section]; | |
1498 | ||
1499 | else if (!strncmp (p, "V1_MODU", 7)) | |
1500 | return darwin_sections[objc_module_info_section]; | |
1501 | else if (!strncmp (p, "V1_SYMT", 7)) | |
1502 | return darwin_sections[objc_symbols_section]; | |
1503 | else if (!strncmp (p, "V1_INFO", 7)) | |
1504 | return darwin_sections[objc_image_info_section]; | |
1505 | ||
1506 | else if (!strncmp (p, "V1_PLST", 7)) | |
1507 | return darwin_sections[objc1_prop_list_section]; | |
1508 | else if (!strncmp (p, "V1_PEXT", 7)) | |
1509 | return darwin_sections[objc1_protocol_ext_section]; | |
1510 | else if (!strncmp (p, "V1_CEXT", 7)) | |
1511 | return darwin_sections[objc1_class_ext_section]; | |
1512 | ||
1513 | else if (!strncmp (p, "V2_CSTR", 7)) | |
1514 | return darwin_sections[objc_constant_string_object_section]; | |
1515 | ||
1516 | return base; | |
1517 | } | |
1518 | ||
50e6797e | 1519 | section * |
1520 | machopic_select_section (tree decl, | |
1521 | int reloc, | |
1522 | unsigned HOST_WIDE_INT align) | |
1523 | { | |
f199808c | 1524 | bool zsize, one, weak, use_coal, ro; |
3b73548b | 1525 | section *base_section = NULL; |
50e6797e | 1526 | |
8e79e9d4 | 1527 | weak = (DECL_P (decl) |
1528 | && DECL_WEAK (decl) | |
1529 | && !lookup_attribute ("weak_import", DECL_ATTRIBUTES (decl))); | |
1530 | ||
f199808c | 1531 | zsize = (DECL_P (decl) |
02dcca88 | 1532 | && (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == CONST_DECL) |
e913b5cd | 1533 | && tree_to_uhwi (DECL_SIZE_UNIT (decl)) == 0); |
8e79e9d4 | 1534 | |
f199808c | 1535 | one = DECL_P (decl) |
02dcca88 | 1536 | && TREE_CODE (decl) == VAR_DECL |
b395f451 | 1537 | && DECL_COMDAT_GROUP (decl); |
8e79e9d4 | 1538 | |
f199808c | 1539 | use_coal = (weak || one) && ld_uses_coal_sects; |
1540 | ||
8e79e9d4 | 1541 | ro = TREE_READONLY (decl) || TREE_CONSTANT (decl) ; |
1542 | ||
c6134e23 | 1543 | switch (categorize_decl_for_section (decl, reloc)) |
50e6797e | 1544 | { |
1545 | case SECCAT_TEXT: | |
9e09909d | 1546 | gcc_unreachable (); |
50e6797e | 1547 | break; |
1548 | ||
1549 | case SECCAT_RODATA: | |
1550 | case SECCAT_SRODATA: | |
f199808c | 1551 | base_section = darwin_rodata_section (use_coal, zsize); |
50e6797e | 1552 | break; |
1553 | ||
1554 | case SECCAT_RODATA_MERGE_STR: | |
1555 | base_section = darwin_mergeable_string_section (decl, align); | |
1556 | break; | |
1557 | ||
1558 | case SECCAT_RODATA_MERGE_STR_INIT: | |
1559 | base_section = darwin_mergeable_string_section (DECL_INITIAL (decl), align); | |
1560 | break; | |
1561 | ||
1562 | case SECCAT_RODATA_MERGE_CONST: | |
8e79e9d4 | 1563 | base_section = darwin_mergeable_constant_section (decl, align, zsize); |
50e6797e | 1564 | break; |
1565 | ||
1566 | case SECCAT_DATA: | |
1567 | case SECCAT_DATA_REL: | |
1568 | case SECCAT_DATA_REL_LOCAL: | |
1569 | case SECCAT_DATA_REL_RO: | |
1570 | case SECCAT_DATA_REL_RO_LOCAL: | |
1571 | case SECCAT_SDATA: | |
1572 | case SECCAT_TDATA: | |
f199808c | 1573 | if (use_coal) |
8e79e9d4 | 1574 | { |
1575 | if (ro) | |
1576 | base_section = darwin_sections[const_data_coal_section]; | |
02dcca88 | 1577 | else |
8e79e9d4 | 1578 | base_section = darwin_sections[data_coal_section]; |
1579 | } | |
02dcca88 | 1580 | else if (DARWIN_SECTION_ANCHORS |
8e79e9d4 | 1581 | && flag_section_anchors |
1582 | && zsize) | |
1583 | { | |
1584 | /* If we're doing section anchors, then punt zero-sized objects into | |
1585 | their own sections so that they don't interfere with offset | |
1586 | computation for the remaining vars. This does not need to be done | |
02dcca88 | 1587 | for stuff in mergeable sections, since these are ineligible for |
8e79e9d4 | 1588 | anchors. */ |
1589 | if (ro) | |
1590 | base_section = darwin_sections[zobj_const_data_section]; | |
1591 | else | |
1592 | base_section = darwin_sections[zobj_data_section]; | |
1593 | } | |
1594 | else if (ro) | |
1595 | base_section = darwin_sections[const_data_section]; | |
1596 | else | |
1597 | base_section = data_section; | |
1598 | break; | |
50e6797e | 1599 | case SECCAT_BSS: |
1600 | case SECCAT_SBSS: | |
1601 | case SECCAT_TBSS: | |
f199808c | 1602 | if (use_coal) |
8e79e9d4 | 1603 | base_section = darwin_sections[data_coal_section]; |
52470889 | 1604 | else |
8e79e9d4 | 1605 | { |
1606 | if (!TREE_PUBLIC (decl)) | |
1607 | base_section = lcomm_section; | |
1608 | else if (bss_noswitch_section) | |
1609 | base_section = bss_noswitch_section; | |
1610 | else | |
1611 | base_section = data_section; | |
1612 | } | |
50e6797e | 1613 | break; |
1614 | ||
1615 | default: | |
1616 | gcc_unreachable (); | |
52470889 | 1617 | } |
50e6797e | 1618 | |
02dcca88 | 1619 | /* Darwin weird special cases. |
267785bc | 1620 | a) OBJC Meta-data. */ |
02dcca88 | 1621 | if (DECL_P (decl) |
1622 | && (TREE_CODE (decl) == VAR_DECL | |
267785bc | 1623 | || TREE_CODE (decl) == CONST_DECL) |
1624 | && DECL_ATTRIBUTES (decl)) | |
1625 | { | |
1626 | tree meta = lookup_attribute ("OBJC2META", DECL_ATTRIBUTES (decl)); | |
1627 | if (meta) | |
1628 | return darwin_objc2_section (decl, meta, base_section); | |
1629 | meta = lookup_attribute ("OBJC1META", DECL_ATTRIBUTES (decl)); | |
1630 | if (meta) | |
1631 | return darwin_objc1_section (decl, meta, base_section); | |
1632 | meta = lookup_attribute ("OBJC1METG", DECL_ATTRIBUTES (decl)); | |
1633 | if (meta) | |
1634 | return base_section; /* GNU runtime is happy with it all in one pot. */ | |
1635 | } | |
1636 | ||
1637 | /* b) Constant string objects. */ | |
50e6797e | 1638 | if (TREE_CODE (decl) == CONSTRUCTOR |
1639 | && TREE_TYPE (decl) | |
1640 | && TREE_CODE (TREE_TYPE (decl)) == RECORD_TYPE | |
1641 | && TYPE_NAME (TREE_TYPE (decl))) | |
52470889 | 1642 | { |
50e6797e | 1643 | tree name = TYPE_NAME (TREE_TYPE (decl)); |
52470889 | 1644 | if (TREE_CODE (name) == TYPE_DECL) |
50e6797e | 1645 | name = DECL_NAME (name); |
0616a948 | 1646 | |
1647 | if (!strcmp (IDENTIFIER_POINTER (name), "__builtin_ObjCString")) | |
267785bc | 1648 | { |
1649 | if (flag_next_runtime) | |
1650 | { | |
1651 | if (flag_objc_abi == 2) | |
1652 | return darwin_sections[objc2_constant_string_object_section]; | |
1653 | else | |
1654 | return darwin_sections[objc_constant_string_object_section]; | |
1655 | } | |
1656 | else | |
1657 | return darwin_sections[objc_string_object_section]; | |
1658 | } | |
d4238e8b | 1659 | else if (!strcmp (IDENTIFIER_POINTER (name), "__builtin_CFString")) |
1660 | return darwin_sections[cfstring_constant_object_section]; | |
52470889 | 1661 | else |
267785bc | 1662 | return base_section; |
52470889 | 1663 | } |
267785bc | 1664 | /* c) legacy meta-data selection. */ |
50e6797e | 1665 | else if (TREE_CODE (decl) == VAR_DECL |
1666 | && DECL_NAME (decl) | |
1667 | && TREE_CODE (DECL_NAME (decl)) == IDENTIFIER_NODE | |
1668 | && IDENTIFIER_POINTER (DECL_NAME (decl)) | |
267785bc | 1669 | && flag_next_runtime |
50e6797e | 1670 | && !strncmp (IDENTIFIER_POINTER (DECL_NAME (decl)), "_OBJC_", 6)) |
52470889 | 1671 | { |
50e6797e | 1672 | const char *name = IDENTIFIER_POINTER (DECL_NAME (decl)); |
267785bc | 1673 | static bool warned_objc_46 = false; |
02dcca88 | 1674 | /* We shall assert that zero-sized objects are an error in ObjC |
8e79e9d4 | 1675 | meta-data. */ |
e913b5cd | 1676 | gcc_assert (tree_to_uhwi (DECL_SIZE_UNIT (decl)) != 0); |
02dcca88 | 1677 | |
267785bc | 1678 | /* ??? This mechanism for determining the metadata section is |
1679 | broken when LTO is in use, since the frontend that generated | |
1680 | the data is not identified. We will keep the capability for | |
1681 | the short term - in case any non-Objective-C programs are using | |
1682 | it to place data in specified sections. */ | |
1683 | if (!warned_objc_46) | |
1684 | { | |
1685 | location_t loc = DECL_SOURCE_LOCATION (decl); | |
1686 | warning_at (loc, 0, "the use of _OBJC_-prefixed variable names" | |
1687 | " to select meta-data sections is deprecated at 4.6" | |
1688 | " and will be removed in 4.7"); | |
1689 | warned_objc_46 = true; | |
1690 | } | |
02dcca88 | 1691 | |
52470889 | 1692 | if (!strncmp (name, "_OBJC_CLASS_METHODS_", 20)) |
50e6797e | 1693 | return darwin_sections[objc_cls_meth_section]; |
52470889 | 1694 | else if (!strncmp (name, "_OBJC_INSTANCE_METHODS_", 23)) |
50e6797e | 1695 | return darwin_sections[objc_inst_meth_section]; |
8e79e9d4 | 1696 | else if (!strncmp (name, "_OBJC_CATEGORY_CLASS_METHODS_", 29)) |
50e6797e | 1697 | return darwin_sections[objc_cat_cls_meth_section]; |
8e79e9d4 | 1698 | else if (!strncmp (name, "_OBJC_CATEGORY_INSTANCE_METHODS_", 32)) |
50e6797e | 1699 | return darwin_sections[objc_cat_inst_meth_section]; |
52470889 | 1700 | else if (!strncmp (name, "_OBJC_CLASS_VARIABLES_", 22)) |
50e6797e | 1701 | return darwin_sections[objc_class_vars_section]; |
52470889 | 1702 | else if (!strncmp (name, "_OBJC_INSTANCE_VARIABLES_", 25)) |
50e6797e | 1703 | return darwin_sections[objc_instance_vars_section]; |
52470889 | 1704 | else if (!strncmp (name, "_OBJC_CLASS_PROTOCOLS_", 22)) |
50e6797e | 1705 | return darwin_sections[objc_cat_cls_meth_section]; |
52470889 | 1706 | else if (!strncmp (name, "_OBJC_CLASS_NAME_", 17)) |
50e6797e | 1707 | return darwin_sections[objc_class_names_section]; |
52470889 | 1708 | else if (!strncmp (name, "_OBJC_METH_VAR_NAME_", 20)) |
50e6797e | 1709 | return darwin_sections[objc_meth_var_names_section]; |
52470889 | 1710 | else if (!strncmp (name, "_OBJC_METH_VAR_TYPE_", 20)) |
50e6797e | 1711 | return darwin_sections[objc_meth_var_types_section]; |
52470889 | 1712 | else if (!strncmp (name, "_OBJC_CLASS_REFERENCES", 22)) |
50e6797e | 1713 | return darwin_sections[objc_cls_refs_section]; |
52470889 | 1714 | else if (!strncmp (name, "_OBJC_CLASS_", 12)) |
50e6797e | 1715 | return darwin_sections[objc_class_section]; |
52470889 | 1716 | else if (!strncmp (name, "_OBJC_METACLASS_", 16)) |
50e6797e | 1717 | return darwin_sections[objc_meta_class_section]; |
52470889 | 1718 | else if (!strncmp (name, "_OBJC_CATEGORY_", 15)) |
50e6797e | 1719 | return darwin_sections[objc_category_section]; |
52470889 | 1720 | else if (!strncmp (name, "_OBJC_SELECTOR_REFERENCES", 25)) |
50e6797e | 1721 | return darwin_sections[objc_selector_refs_section]; |
52470889 | 1722 | else if (!strncmp (name, "_OBJC_SELECTOR_FIXUP", 20)) |
50e6797e | 1723 | return darwin_sections[objc_selector_fixup_section]; |
52470889 | 1724 | else if (!strncmp (name, "_OBJC_SYMBOLS", 13)) |
50e6797e | 1725 | return darwin_sections[objc_symbols_section]; |
52470889 | 1726 | else if (!strncmp (name, "_OBJC_MODULES", 13)) |
50e6797e | 1727 | return darwin_sections[objc_module_info_section]; |
c17b85ea | 1728 | else if (!strncmp (name, "_OBJC_IMAGE_INFO", 16)) |
50e6797e | 1729 | return darwin_sections[objc_image_info_section]; |
52470889 | 1730 | else if (!strncmp (name, "_OBJC_PROTOCOL_INSTANCE_METHODS_", 32)) |
50e6797e | 1731 | return darwin_sections[objc_cat_inst_meth_section]; |
52470889 | 1732 | else if (!strncmp (name, "_OBJC_PROTOCOL_CLASS_METHODS_", 29)) |
50e6797e | 1733 | return darwin_sections[objc_cat_cls_meth_section]; |
52470889 | 1734 | else if (!strncmp (name, "_OBJC_PROTOCOL_REFS_", 20)) |
50e6797e | 1735 | return darwin_sections[objc_cat_cls_meth_section]; |
52470889 | 1736 | else if (!strncmp (name, "_OBJC_PROTOCOL_", 15)) |
50e6797e | 1737 | return darwin_sections[objc_protocol_section]; |
52470889 | 1738 | else |
50e6797e | 1739 | return base_section; |
52470889 | 1740 | } |
50e6797e | 1741 | |
1742 | return base_section; | |
52470889 | 1743 | } |
1744 | ||
bbfbe351 | 1745 | /* This can be called with address expressions as "rtx". |
9cb8e99f | 1746 | They must go in "const". */ |
bbfbe351 | 1747 | |
2f14b1f9 | 1748 | section * |
3754d046 | 1749 | machopic_select_rtx_section (machine_mode mode, rtx x, |
b40da9a7 | 1750 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) |
bbfbe351 | 1751 | { |
f2e8796e | 1752 | if (GET_MODE_SIZE (mode) == 8 |
1753 | && (GET_CODE (x) == CONST_INT | |
219f3246 | 1754 | || GET_CODE (x) == CONST_WIDE_INT |
f2e8796e | 1755 | || GET_CODE (x) == CONST_DOUBLE)) |
92e4ba7d | 1756 | return darwin_sections[literal8_section]; |
bbfbe351 | 1757 | else if (GET_MODE_SIZE (mode) == 4 |
1758 | && (GET_CODE (x) == CONST_INT | |
219f3246 | 1759 | || GET_CODE (x) == CONST_WIDE_INT |
bbfbe351 | 1760 | || GET_CODE (x) == CONST_DOUBLE)) |
92e4ba7d | 1761 | return darwin_sections[literal4_section]; |
4be92808 | 1762 | else if (HAVE_GAS_LITERAL16 |
1763 | && TARGET_64BIT | |
7463cbdf | 1764 | && GET_MODE_SIZE (mode) == 16 |
3ebc7dec | 1765 | && (GET_CODE (x) == CONST_INT |
219f3246 | 1766 | || GET_CODE (x) == CONST_WIDE_INT |
2805e80b | 1767 | || GET_CODE (x) == CONST_DOUBLE |
1768 | || GET_CODE (x) == CONST_VECTOR)) | |
3ebc7dec | 1769 | return darwin_sections[literal16_section]; |
459f8624 | 1770 | else if (MACHOPIC_INDIRECT |
76dece62 | 1771 | && (GET_CODE (x) == SYMBOL_REF |
1772 | || GET_CODE (x) == CONST | |
1773 | || GET_CODE (x) == LABEL_REF)) | |
92e4ba7d | 1774 | return darwin_sections[const_data_section]; |
bbfbe351 | 1775 | else |
92e4ba7d | 1776 | return darwin_sections[const_section]; |
bbfbe351 | 1777 | } |
1778 | ||
01d15dc5 | 1779 | void |
b40da9a7 | 1780 | machopic_asm_out_constructor (rtx symbol, int priority ATTRIBUTE_UNUSED) |
01d15dc5 | 1781 | { |
ed161dab | 1782 | cdtor_record new_elt = {symbol, priority, vec_safe_length (ctors)}; |
4b313269 | 1783 | |
1784 | vec_safe_push (ctors, new_elt); | |
1785 | ||
1786 | if (! MACHOPIC_INDIRECT) | |
1787 | fprintf (asm_out_file, ".reference .constructors_used\n"); | |
1788 | } | |
1789 | ||
ed161dab | 1790 | void |
1791 | machopic_asm_out_destructor (rtx symbol, int priority ATTRIBUTE_UNUSED) | |
1792 | { | |
1793 | cdtor_record new_elt = {symbol, priority, vec_safe_length (dtors)}; | |
1794 | ||
1795 | vec_safe_push (dtors, new_elt); | |
1796 | ||
1797 | if (! MACHOPIC_INDIRECT) | |
1798 | fprintf (asm_out_file, ".reference .destructors_used\n"); | |
1799 | } | |
1800 | ||
4b313269 | 1801 | static int |
ed161dab | 1802 | sort_cdtor_records (const void * a, const void * b) |
4b313269 | 1803 | { |
ed161dab | 1804 | const cdtor_record *cda = (const cdtor_record *)a; |
1805 | const cdtor_record *cdb = (const cdtor_record *)b; | |
1806 | if (cda->priority > cdb->priority) | |
4b313269 | 1807 | return 1; |
ed161dab | 1808 | if (cda->priority < cdb->priority) |
4b313269 | 1809 | return -1; |
ed161dab | 1810 | if (cda->position > cdb->position) |
4b313269 | 1811 | return 1; |
ed161dab | 1812 | if (cda->position < cdb->position) |
4b313269 | 1813 | return -1; |
1814 | return 0; | |
1815 | } | |
1816 | ||
02dcca88 | 1817 | static void |
ed161dab | 1818 | finalize_ctors () |
4b313269 | 1819 | { |
1820 | unsigned int i; | |
ed161dab | 1821 | cdtor_record *elt; |
02dcca88 | 1822 | |
8f74ae7b | 1823 | if (MACHOPIC_INDIRECT) |
92e4ba7d | 1824 | switch_to_section (darwin_sections[mod_init_section]); |
01d15dc5 | 1825 | else |
92e4ba7d | 1826 | switch_to_section (darwin_sections[constructor_section]); |
01d15dc5 | 1827 | |
4b313269 | 1828 | if (vec_safe_length (ctors) > 1) |
ed161dab | 1829 | ctors->qsort (sort_cdtor_records); |
4b313269 | 1830 | FOR_EACH_VEC_SAFE_ELT (ctors, i, elt) |
1831 | { | |
1832 | assemble_align (POINTER_SIZE); | |
1833 | assemble_integer (elt->symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
1834 | } | |
01d15dc5 | 1835 | } |
1836 | ||
ed161dab | 1837 | static void |
1838 | finalize_dtors () | |
01d15dc5 | 1839 | { |
ed161dab | 1840 | unsigned int i; |
1841 | cdtor_record *elt; | |
1842 | ||
8f74ae7b | 1843 | if (MACHOPIC_INDIRECT) |
92e4ba7d | 1844 | switch_to_section (darwin_sections[mod_term_section]); |
01d15dc5 | 1845 | else |
92e4ba7d | 1846 | switch_to_section (darwin_sections[destructor_section]); |
01d15dc5 | 1847 | |
ed161dab | 1848 | if (vec_safe_length (dtors) > 1) |
1849 | dtors->qsort (sort_cdtor_records); | |
1850 | FOR_EACH_VEC_SAFE_ELT (dtors, i, elt) | |
1851 | { | |
1852 | assemble_align (POINTER_SIZE); | |
1853 | assemble_integer (elt->symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
1854 | } | |
01d15dc5 | 1855 | } |
1f3233d1 | 1856 | |
67c1e638 | 1857 | void |
b40da9a7 | 1858 | darwin_globalize_label (FILE *stream, const char *name) |
67c1e638 | 1859 | { |
1860 | if (!!strncmp (name, "_OBJC_", 6)) | |
1861 | default_globalize_label (stream, name); | |
1862 | } | |
1863 | ||
02dcca88 | 1864 | /* This routine returns non-zero if 'name' starts with the special objective-c |
1865 | anonymous file-scope static name. It accommodates c++'s mangling of such | |
32e31f06 | 1866 | symbols (in this case the symbols will have form _ZL{d}*_OBJC_* d=digit). */ |
02dcca88 | 1867 | |
1868 | int | |
32e31f06 | 1869 | darwin_label_is_anonymous_local_objc_name (const char *name) |
1870 | { | |
1871 | const unsigned char *p = (const unsigned char *) name; | |
1872 | if (*p != '_') | |
1873 | return 0; | |
1874 | if (p[1] == 'Z' && p[2] == 'L') | |
1875 | { | |
1876 | p += 3; | |
1877 | while (*p >= '0' && *p <= '9') | |
1878 | p++; | |
1879 | } | |
1880 | return (!strncmp ((const char *)p, "_OBJC_", 6)); | |
1881 | } | |
1882 | ||
13e2f0a0 | 1883 | /* LTO support for Mach-O. |
23433d72 | 1884 | |
13e2f0a0 | 1885 | This version uses three mach-o sections to encapsulate the (unlimited |
1886 | number of) lto sections. | |
23433d72 | 1887 | |
13e2f0a0 | 1888 | __GNU_LTO, __lto_sections contains the concatented GNU LTO section data. |
1889 | __GNU_LTO, __section_names contains the GNU LTO section names. | |
1890 | __GNU_LTO, __section_index contains an array of values that index these. | |
23433d72 | 1891 | |
13e2f0a0 | 1892 | Indexed thus: |
1893 | <section offset from the start of __GNU_LTO, __lto_sections>, | |
1894 | <section length> | |
1895 | <name offset from the start of __GNU_LTO, __section_names, | |
1896 | <name length>. | |
1897 | ||
1898 | At present, for both m32 and m64 mach-o files each of these fields is | |
1899 | represented by a uint32_t. This is because, AFAICT, a mach-o object | |
1900 | cannot exceed 4Gb because the section_64 offset field (see below) is 32bits. | |
1901 | ||
1902 | uint32_t offset; | |
1903 | "offset An integer specifying the offset to this section in the file." */ | |
1904 | ||
1905 | /* Count lto section numbers. */ | |
1906 | static unsigned int lto_section_num = 0; | |
1907 | ||
1908 | /* A vector of information about LTO sections, at present, we only have | |
1909 | the name. TODO: see if we can get the data length somehow. */ | |
1910 | typedef struct GTY (()) darwin_lto_section_e { | |
1911 | const char *sectname; | |
1912 | } darwin_lto_section_e ; | |
13e2f0a0 | 1913 | |
f1f41a6c | 1914 | static GTY (()) vec<darwin_lto_section_e, va_gc> *lto_section_names; |
13e2f0a0 | 1915 | |
13e2f0a0 | 1916 | /* Section wrapper scheme (used here to wrap the unlimited number of LTO |
1917 | sections into three Mach-O ones). | |
1918 | NOTE: These names MUST be kept in sync with those in | |
1919 | libiberty/simple-object-mach-o. */ | |
1920 | #define LTO_SECTS_SECTION "__wrapper_sects" | |
1921 | #define LTO_NAMES_SECTION "__wrapper_names" | |
1922 | #define LTO_INDEX_SECTION "__wrapper_index" | |
23433d72 | 1923 | |
1924 | /* File to temporarily store LTO data. This is appended to asm_out_file | |
1925 | in darwin_end_file. */ | |
1926 | static FILE *lto_asm_out_file, *saved_asm_out_file; | |
1927 | static char *lto_asm_out_name; | |
7c7883aa | 1928 | static enum debug_info_levels saved_debug_info_level; |
23433d72 | 1929 | |
1930 | /* Prepare asm_out_file for LTO output. For darwin, this means hiding | |
1931 | asm_out_file and switching to an alternative output file. */ | |
1932 | void | |
1933 | darwin_asm_lto_start (void) | |
1934 | { | |
1935 | gcc_assert (! saved_asm_out_file); | |
1936 | saved_asm_out_file = asm_out_file; | |
7c7883aa | 1937 | saved_debug_info_level = debug_info_level; |
1938 | debug_info_level = DINFO_LEVEL_NONE; | |
23433d72 | 1939 | if (! lto_asm_out_name) |
1940 | lto_asm_out_name = make_temp_file (".lto.s"); | |
1941 | lto_asm_out_file = fopen (lto_asm_out_name, "a"); | |
1942 | if (lto_asm_out_file == NULL) | |
c05be867 | 1943 | fatal_error (input_location, |
1944 | "failed to open temporary file %s for LTO output", | |
23433d72 | 1945 | lto_asm_out_name); |
1946 | asm_out_file = lto_asm_out_file; | |
1947 | } | |
1948 | ||
1949 | /* Restore asm_out_file. */ | |
1950 | void | |
1951 | darwin_asm_lto_end (void) | |
1952 | { | |
1953 | gcc_assert (saved_asm_out_file); | |
1954 | fclose (lto_asm_out_file); | |
1955 | asm_out_file = saved_asm_out_file; | |
1956 | saved_asm_out_file = NULL; | |
7c7883aa | 1957 | debug_info_level = saved_debug_info_level; |
23433d72 | 1958 | } |
1959 | ||
edea89b9 | 1960 | static void |
7b53e714 | 1961 | darwin_asm_dwarf_section (const char *name, unsigned int flags, |
1962 | tree decl, bool is_for_lto); | |
edea89b9 | 1963 | |
1964 | /* Called for the TARGET_ASM_NAMED_SECTION hook. */ | |
1965 | ||
2f9fc8ef | 1966 | void |
b215c058 | 1967 | darwin_asm_named_section (const char *name, |
23433d72 | 1968 | unsigned int flags, |
537cd941 | 1969 | tree decl ATTRIBUTE_UNUSED) |
2f9fc8ef | 1970 | { |
13e2f0a0 | 1971 | /* LTO sections go in a special section that encapsulates the (unlimited) |
1972 | number of GNU LTO sections within a single mach-o one. */ | |
23433d72 | 1973 | if (strncmp (name, LTO_SECTION_NAME_PREFIX, |
1974 | strlen (LTO_SECTION_NAME_PREFIX)) == 0) | |
1975 | { | |
13e2f0a0 | 1976 | darwin_lto_section_e e; |
23433d72 | 1977 | /* We expect certain flags to be set... */ |
1978 | gcc_assert ((flags & (SECTION_DEBUG | SECTION_NAMED)) | |
1979 | == (SECTION_DEBUG | SECTION_NAMED)); | |
1980 | ||
13e2f0a0 | 1981 | /* Switch to our combined section. */ |
1982 | fprintf (asm_out_file, "\t.section %s,%s,regular,debug\n", | |
1983 | LTO_SEGMENT_NAME, LTO_SECTS_SECTION); | |
1984 | /* Output a label for the start of this sub-section. */ | |
1985 | fprintf (asm_out_file, "L_GNU_LTO%d:\t;# %s\n", | |
1986 | lto_section_num, name); | |
1987 | /* We have to jump through hoops to get the values of the intra-section | |
1988 | offsets... */ | |
1989 | fprintf (asm_out_file, "\t.set L$gnu$lto$offs%d,L_GNU_LTO%d-L_GNU_LTO0\n", | |
1990 | lto_section_num, lto_section_num); | |
1991 | fprintf (asm_out_file, | |
1992 | "\t.set L$gnu$lto$size%d,L_GNU_LTO%d-L_GNU_LTO%d\n", | |
1993 | lto_section_num, lto_section_num+1, lto_section_num); | |
1994 | lto_section_num++; | |
1995 | e.sectname = xstrdup (name); | |
1996 | /* Keep the names, we'll need to make a table later. | |
1997 | TODO: check that we do not revisit sections, that would break | |
1998 | the assumption of how this is done. */ | |
1999 | if (lto_section_names == NULL) | |
f1f41a6c | 2000 | vec_alloc (lto_section_names, 16); |
2001 | vec_safe_push (lto_section_names, e); | |
13e2f0a0 | 2002 | } |
edea89b9 | 2003 | else if (strncmp (name, "__DWARF,", 8) == 0) |
7b53e714 | 2004 | darwin_asm_dwarf_section (name, flags, decl, false); |
2005 | else if (strncmp (name, "__GNU_DWARF_LTO,", 16) == 0) | |
2006 | darwin_asm_dwarf_section (name, flags, decl, true); | |
23433d72 | 2007 | else |
2008 | fprintf (asm_out_file, "\t.section %s\n", name); | |
2f9fc8ef | 2009 | } |
2010 | ||
b215c058 | 2011 | void |
1dc74225 | 2012 | darwin_unique_section (tree decl ATTRIBUTE_UNUSED, int reloc ATTRIBUTE_UNUSED) |
2f9fc8ef | 2013 | { |
1dc74225 | 2014 | /* Darwin does not use unique sections. */ |
2f9fc8ef | 2015 | } |
2016 | ||
5b182752 | 2017 | /* Handle __attribute__ ((apple_kext_compatibility)). |
2018 | This only applies to darwin kexts for 2.95 compatibility -- it shrinks the | |
2019 | vtable for classes with this attribute (and their descendants) by not | |
2020 | outputting the new 3.0 nondeleting destructor. This means that such | |
2021 | objects CANNOT be allocated on the stack or as globals UNLESS they have | |
2022 | a completely empty `operator delete'. | |
2023 | Luckily, this fits in with the Darwin kext model. | |
2024 | ||
2025 | This attribute also disables gcc3's potential overlaying of derived | |
2026 | class data members on the padding at the end of the base class. */ | |
2027 | ||
2028 | tree | |
2029 | darwin_handle_kext_attribute (tree *node, tree name, | |
2030 | tree args ATTRIBUTE_UNUSED, | |
2031 | int flags ATTRIBUTE_UNUSED, | |
2032 | bool *no_add_attrs) | |
2033 | { | |
2034 | /* APPLE KEXT stuff -- only applies with pure static C++ code. */ | |
2035 | if (! TARGET_KEXTABI) | |
2036 | { | |
67a779df | 2037 | warning (0, "%qE 2.95 vtable-compatibility attribute applies " |
2038 | "only when compiling a kext", name); | |
5b182752 | 2039 | |
2040 | *no_add_attrs = true; | |
2041 | } | |
2042 | else if (TREE_CODE (*node) != RECORD_TYPE) | |
2043 | { | |
67a779df | 2044 | warning (0, "%qE 2.95 vtable-compatibility attribute applies " |
2045 | "only to C++ classes", name); | |
5b182752 | 2046 | |
2047 | *no_add_attrs = true; | |
2048 | } | |
2049 | ||
2050 | return NULL_TREE; | |
2051 | } | |
2052 | ||
975d636c | 2053 | /* Handle a "weak_import" attribute; arguments as in |
2054 | struct attribute_spec.handler. */ | |
2055 | ||
2056 | tree | |
2057 | darwin_handle_weak_import_attribute (tree *node, tree name, | |
2058 | tree ARG_UNUSED (args), | |
2059 | int ARG_UNUSED (flags), | |
2060 | bool * no_add_attrs) | |
2061 | { | |
d0ddd548 | 2062 | if (TREE_CODE (*node) != FUNCTION_DECL && TREE_CODE (*node) != VAR_DECL) |
975d636c | 2063 | { |
67a779df | 2064 | warning (OPT_Wattributes, "%qE attribute ignored", |
2065 | name); | |
975d636c | 2066 | *no_add_attrs = true; |
2067 | } | |
2068 | else | |
2069 | declare_weak (*node); | |
2070 | ||
2071 | return NULL_TREE; | |
2072 | } | |
a3952a36 | 2073 | |
b215c058 | 2074 | /* Emit a label for an FDE, making it global and/or weak if appropriate. |
ef1074f7 | 2075 | The third parameter is nonzero if this is for exception handling. |
2076 | The fourth parameter is nonzero if this is just a placeholder for an | |
2f9fc8ef | 2077 | FDE that we are omitting. */ |
ef1074f7 | 2078 | |
b215c058 | 2079 | void |
ef1074f7 | 2080 | darwin_emit_unwind_label (FILE *file, tree decl, int for_eh, int empty) |
2f9fc8ef | 2081 | { |
9e09909d | 2082 | char *lab ; |
2083 | char buf[32]; | |
2084 | static int invok_count = 0; | |
2085 | static tree last_fun_decl = NULL_TREE; | |
02dcca88 | 2086 | |
7e96ac5f | 2087 | /* Modern linkers can produce distinct FDEs without compiler support. */ |
2088 | if (! for_eh || ! ld_needs_eh_markers) | |
d08d29c0 | 2089 | return; |
2f9fc8ef | 2090 | |
02dcca88 | 2091 | /* FIXME: This only works when the eh for all sections of a function are |
9e09909d | 2092 | emitted at the same time. If that changes, we would need to use a lookup |
2093 | table of some form to determine what to do. Also, we should emit the | |
2094 | unadorned label for the partition containing the public label for a | |
2095 | function. This is of limited use, probably, since we do not currently | |
2096 | enable partitioning. */ | |
2097 | strcpy (buf, ".eh"); | |
02dcca88 | 2098 | if (decl && TREE_CODE (decl) == FUNCTION_DECL) |
9e09909d | 2099 | { |
2100 | if (decl == last_fun_decl) | |
2101 | { | |
2102 | invok_count++; | |
2103 | snprintf (buf, 31, "$$part$$%d.eh", invok_count); | |
2104 | } | |
2105 | else | |
2106 | { | |
2107 | last_fun_decl = decl; | |
2108 | invok_count = 0; | |
2109 | } | |
2110 | } | |
2111 | ||
2112 | lab = concat (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)), buf, NULL); | |
2f9fc8ef | 2113 | |
2114 | if (TREE_PUBLIC (decl)) | |
e8f535c2 | 2115 | { |
2116 | targetm.asm_out.globalize_label (file, lab); | |
2117 | if (DECL_VISIBILITY (decl) == VISIBILITY_HIDDEN) | |
2118 | { | |
2119 | fputs ("\t.private_extern ", file); | |
2120 | assemble_name (file, lab); | |
2121 | fputc ('\n', file); | |
2122 | } | |
2123 | } | |
2f9fc8ef | 2124 | |
1dc74225 | 2125 | if (DECL_WEAK (decl)) |
e8f535c2 | 2126 | { |
2127 | fputs ("\t.weak_definition ", file); | |
2128 | assemble_name (file, lab); | |
2129 | fputc ('\n', file); | |
2130 | } | |
2f9fc8ef | 2131 | |
e8f535c2 | 2132 | assemble_name (file, lab); |
2f9fc8ef | 2133 | if (empty) |
a3952a36 | 2134 | { |
e8f535c2 | 2135 | fputs (" = 0\n", file); |
a3952a36 | 2136 | |
2137 | /* Mark the absolute .eh and .eh1 style labels as needed to | |
2138 | ensure that we don't dead code strip them and keep such | |
2139 | labels from another instantiation point until we can fix this | |
2140 | properly with group comdat support. */ | |
e8f535c2 | 2141 | darwin_mark_decl_preserved (lab); |
a3952a36 | 2142 | } |
2f9fc8ef | 2143 | else |
e8f535c2 | 2144 | fputs (":\n", file); |
2f9fc8ef | 2145 | |
2146 | free (lab); | |
2147 | } | |
2148 | ||
b215c058 | 2149 | static GTY(()) unsigned long except_table_label_num; |
2150 | ||
2151 | void | |
2152 | darwin_emit_except_table_label (FILE *file) | |
2153 | { | |
2154 | char section_start_label[30]; | |
2155 | ||
2156 | ASM_GENERATE_INTERNAL_LABEL (section_start_label, "GCC_except_table", | |
2157 | except_table_label_num++); | |
2158 | ASM_OUTPUT_LABEL (file, section_start_label); | |
2159 | } | |
2160 | /* Generate a PC-relative reference to a Mach-O non-lazy-symbol. */ | |
ef1074f7 | 2161 | |
2f9fc8ef | 2162 | void |
2163 | darwin_non_lazy_pcrel (FILE *file, rtx addr) | |
2164 | { | |
2f9fc8ef | 2165 | const char *nlp_name; |
2166 | ||
27d2baef | 2167 | gcc_assert (GET_CODE (addr) == SYMBOL_REF); |
2f9fc8ef | 2168 | |
ab06d2ff | 2169 | nlp_name = machopic_indirection_name (addr, /*stub_p=*/false); |
2f9fc8ef | 2170 | fputs ("\t.long\t", file); |
2171 | ASM_OUTPUT_LABELREF (file, nlp_name); | |
2172 | fputs ("-.", file); | |
2173 | } | |
2174 | ||
8e79e9d4 | 2175 | /* If this is uncommented, details of each allocation will be printed |
2176 | in the asm right before the actual code. WARNING - this will cause some | |
2177 | test-suite fails (since the printout will contain items that some tests | |
2178 | are not expecting) -- so don't leave it on by default (it bloats the | |
2179 | asm too). */ | |
2180 | /*#define DEBUG_DARWIN_MEM_ALLOCATORS*/ | |
2181 | ||
2182 | /* The first two of these routines are ostensibly just intended to put | |
2183 | names into the asm. However, they are both hijacked in order to ensure | |
2184 | that zero-sized items do not make their way into the output. Consequently, | |
2185 | we also need to make these participate in provisions for dealing with | |
2186 | such items in section anchors. */ | |
2187 | ||
2188 | /* The implementation of ASM_DECLARE_OBJECT_NAME. */ | |
2189 | /* The RTTI data (e.g., __ti4name) is common and public (and static), | |
2190 | but it does need to be referenced via indirect PIC data pointers. | |
2191 | The machopic_define_symbol calls are telling the machopic subsystem | |
2192 | that the name *is* defined in this module, so it doesn't need to | |
2193 | make them indirect. */ | |
02dcca88 | 2194 | void |
2195 | darwin_asm_declare_object_name (FILE *file, | |
8e79e9d4 | 2196 | const char *nam, tree decl) |
2197 | { | |
2198 | const char *xname = nam; | |
2199 | unsigned HOST_WIDE_INT size; | |
2200 | bool local_def, weak; | |
2201 | ||
2202 | weak = (DECL_P (decl) | |
2203 | && DECL_WEAK (decl) | |
02dcca88 | 2204 | && !lookup_attribute ("weak_import", |
8e79e9d4 | 2205 | DECL_ATTRIBUTES (decl))); |
2206 | ||
02dcca88 | 2207 | local_def = DECL_INITIAL (decl) || (TREE_STATIC (decl) |
2208 | && (!DECL_COMMON (decl) | |
8e79e9d4 | 2209 | || !TREE_PUBLIC (decl))); |
2210 | ||
2211 | if (GET_CODE (XEXP (DECL_RTL (decl), 0)) != SYMBOL_REF) | |
2212 | xname = IDENTIFIER_POINTER (DECL_NAME (decl)); | |
2213 | ||
2214 | if (local_def) | |
2215 | { | |
2216 | (* targetm.encode_section_info) (decl, DECL_RTL (decl), false); | |
2217 | if (!weak) | |
2218 | machopic_define_symbol (DECL_RTL (decl)); | |
2219 | } | |
2220 | ||
e913b5cd | 2221 | size = tree_to_uhwi (DECL_SIZE_UNIT (decl)); |
8e79e9d4 | 2222 | |
2223 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2224 | fprintf (file, "# dadon: %s %s (%llu, %u) local %d weak %d" | |
2225 | " stat %d com %d pub %d t-const %d t-ro %d init %lx\n", | |
02dcca88 | 2226 | xname, (TREE_CODE (decl) == VAR_DECL?"var":"const"), |
2227 | (unsigned long long)size, DECL_ALIGN (decl), local_def, | |
8e79e9d4 | 2228 | DECL_WEAK (decl), TREE_STATIC (decl), DECL_COMMON (decl), |
2229 | TREE_PUBLIC (decl), TREE_CONSTANT (decl), TREE_READONLY (decl), | |
02dcca88 | 2230 | (unsigned long)DECL_INITIAL (decl)); |
8e79e9d4 | 2231 | #endif |
2232 | ||
02dcca88 | 2233 | /* Darwin needs help to support local zero-sized objects. |
8e79e9d4 | 2234 | They must be made at least one byte, and the section containing must be |
2235 | marked as unsuitable for section-anchors (see storage allocators below). | |
02dcca88 | 2236 | |
8e79e9d4 | 2237 | For non-zero objects this output is handled by varasm.c. |
2238 | */ | |
2239 | if (!size) | |
2240 | { | |
2241 | unsigned int l2align = 0; | |
2242 | ||
a967a7ec | 2243 | /* The align must be honored, even for zero-sized. */ |
8e79e9d4 | 2244 | if (DECL_ALIGN (decl)) |
2245 | { | |
2246 | l2align = floor_log2 (DECL_ALIGN (decl) / BITS_PER_UNIT); | |
2247 | fprintf (file, "\t.align\t%u\n", l2align); | |
2248 | } | |
2249 | ||
2250 | ASM_OUTPUT_LABEL (file, xname); | |
2251 | size = 1; | |
f03df321 | 2252 | fprintf (file, "\t.space\t" HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); |
8e79e9d4 | 2253 | |
2254 | /* Check that we've correctly picked up the zero-sized item and placed it | |
2255 | properly. */ | |
2256 | gcc_assert ((!DARWIN_SECTION_ANCHORS || !flag_section_anchors) | |
02dcca88 | 2257 | || (in_section |
8e79e9d4 | 2258 | && (in_section->common.flags & SECTION_NO_ANCHOR))); |
2259 | } | |
2260 | else | |
2261 | ASM_OUTPUT_LABEL (file, xname); | |
2262 | } | |
427eb138 | 2263 | |
8e79e9d4 | 2264 | /* The implementation of ASM_DECLARE_CONSTANT_NAME. */ |
427eb138 | 2265 | void |
2266 | darwin_asm_declare_constant_name (FILE *file, const char *name, | |
2267 | const_tree exp ATTRIBUTE_UNUSED, | |
2268 | HOST_WIDE_INT size) | |
2269 | { | |
2270 | assemble_label (file, name); | |
8e79e9d4 | 2271 | /* As for other items, we need at least one byte. */ |
2272 | if (!size) | |
2273 | { | |
2274 | fputs ("\t.space\t1\n", file); | |
2275 | /* Check that we've correctly picked up the zero-sized item and placed it | |
2276 | properly. */ | |
2277 | gcc_assert ((!DARWIN_SECTION_ANCHORS || !flag_section_anchors) | |
02dcca88 | 2278 | || (in_section |
8e79e9d4 | 2279 | && (in_section->common.flags & SECTION_NO_ANCHOR))); |
2280 | } | |
2281 | } | |
2282 | ||
2283 | /* Darwin storage allocators. | |
2284 | ||
2285 | Zerofill sections are desirable for large blank data since, otherwise, these | |
2286 | data bloat objects (PR33210). | |
2287 | ||
2288 | However, section anchors don't work in .zerofill sections (one cannot switch | |
2289 | to a zerofill section). Ergo, for Darwin targets using section anchors we need | |
2290 | to put (at least some) data into 'normal' switchable sections. | |
2291 | ||
2292 | Here we set a relatively arbitrary value for the size of an object to trigger | |
2293 | zerofill when section anchors are enabled (anything bigger than a page for | |
2294 | current Darwin implementations). FIXME: there ought to be some objective way | |
2295 | to make this choice. | |
2296 | ||
2297 | When section anchor are off this is ignored anyway. */ | |
2298 | ||
2299 | #define BYTES_ZFILL 4096 | |
2300 | ||
2301 | /* Emit a chunk of data for items coalesced by the linker. */ | |
2302 | static void | |
2303 | darwin_emit_weak_or_comdat (FILE *fp, tree decl, const char *name, | |
02dcca88 | 2304 | unsigned HOST_WIDE_INT size, |
f199808c | 2305 | bool use_coal, |
8e79e9d4 | 2306 | unsigned int align) |
2307 | { | |
f199808c | 2308 | /* Since the sections used here are coalesced, they will not be eligible |
2309 | for section anchors, and therefore we don't need to break that out. | |
2310 | CHECKME: for modern linker on PowerPC. */ | |
8e79e9d4 | 2311 | if (TREE_READONLY (decl) || TREE_CONSTANT (decl)) |
f199808c | 2312 | switch_to_section (use_coal ? darwin_sections[const_data_coal_section] |
2313 | : darwin_sections[const_data_section]); | |
8e79e9d4 | 2314 | else |
f199808c | 2315 | switch_to_section (use_coal ? darwin_sections[data_coal_section] |
2316 | : data_section); | |
8e79e9d4 | 2317 | |
2318 | /* To be consistent, we'll allow darwin_asm_declare_object_name to assemble | |
2319 | the align info for zero-sized items... but do it here otherwise. */ | |
2320 | if (size && align) | |
2321 | fprintf (fp, "\t.align\t%d\n", floor_log2 (align / BITS_PER_UNIT)); | |
2322 | ||
2323 | if (TREE_PUBLIC (decl)) | |
2324 | darwin_globalize_label (fp, name); | |
2325 | ||
02dcca88 | 2326 | /* ... and we let it deal with outputting one byte of zero for them too. */ |
8e79e9d4 | 2327 | darwin_asm_declare_object_name (fp, name, decl); |
2328 | if (size) | |
2329 | assemble_zeros (size); | |
2330 | } | |
2331 | ||
267785bc | 2332 | /* Emit a chunk of data for ObjC meta-data that got placed in BSS erroneously. */ |
2333 | static void | |
2334 | darwin_emit_objc_zeroed (FILE *fp, tree decl, const char *name, | |
02dcca88 | 2335 | unsigned HOST_WIDE_INT size, |
267785bc | 2336 | unsigned int align, tree meta) |
2337 | { | |
2338 | section *ocs = data_section; | |
2339 | ||
2340 | if (TREE_PURPOSE (meta) == get_identifier("OBJC2META")) | |
2341 | ocs = darwin_objc2_section (decl, meta, ocs); | |
2342 | else | |
2343 | ocs = darwin_objc1_section (decl, meta, ocs); | |
2344 | ||
2345 | switch_to_section (ocs); | |
2346 | ||
2347 | /* We shall declare that zero-sized meta-data are not valid (yet). */ | |
2348 | gcc_assert (size); | |
2349 | fprintf (fp, "\t.align\t%d\n", floor_log2 (align / BITS_PER_UNIT)); | |
2350 | ||
02dcca88 | 2351 | /* ... and we let it deal with outputting one byte of zero for them too. */ |
267785bc | 2352 | darwin_asm_declare_object_name (fp, name, decl); |
2353 | assemble_zeros (size); | |
2354 | } | |
2355 | ||
8e79e9d4 | 2356 | /* This routine emits 'local' storage: |
2357 | ||
02dcca88 | 2358 | When Section Anchors are off this routine emits .zerofill commands in |
8e79e9d4 | 2359 | sections named for their alignment. |
2360 | ||
2361 | When Section Anchors are on, smaller (non-zero-sized) items are placed in | |
2362 | the .static_data section so that the section anchoring system can see them. | |
2363 | Larger items are still placed in .zerofill sections, addressing PR33210. | |
2364 | The routine has no checking - it is all assumed to be done by the caller. | |
2365 | */ | |
2366 | static void | |
02dcca88 | 2367 | darwin_emit_local_bss (FILE *fp, tree decl, const char *name, |
2368 | unsigned HOST_WIDE_INT size, | |
8e79e9d4 | 2369 | unsigned int l2align) |
2370 | { | |
2371 | /* FIXME: We have a fudge to make this work with Java even when the target does | |
2372 | not use sections anchors -- Java seems to need at least one small item in a | |
2373 | non-zerofill segment. */ | |
2374 | if ((DARWIN_SECTION_ANCHORS && flag_section_anchors && size < BYTES_ZFILL) | |
2375 | || (size && size <= 2)) | |
2376 | { | |
2377 | /* Put smaller objects in _static_data, where the section anchors system | |
2378 | can get them. | |
2379 | However, if they are zero-sized punt them to yet a different section | |
2380 | (that is not allowed to participate in anchoring). */ | |
2381 | if (!size) | |
2382 | { | |
2383 | fputs ("\t.section\t__DATA,__zobj_bss\n", fp); | |
2384 | in_section = darwin_sections[zobj_bss_section]; | |
2385 | size = 1; | |
2386 | } | |
2387 | else | |
2388 | { | |
2389 | fputs ("\t.static_data\n", fp); | |
2390 | in_section = darwin_sections[static_data_section]; | |
2391 | } | |
2392 | ||
2393 | if (l2align) | |
2394 | fprintf (fp, "\t.align\t%u\n", l2align); | |
2395 | ||
02dcca88 | 2396 | assemble_name (fp, name); |
f03df321 | 2397 | fprintf (fp, ":\n\t.space\t" HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); |
8e79e9d4 | 2398 | } |
02dcca88 | 2399 | else |
8e79e9d4 | 2400 | { |
2401 | /* When we are on a non-section anchor target, we can get zero-sized | |
2402 | items here. However, all we need to do is to bump them to one byte | |
2403 | and the section alignment will take care of the rest. */ | |
2404 | char secnam[64]; | |
2405 | unsigned int flags ; | |
02dcca88 | 2406 | snprintf (secnam, 64, "__DATA,__%sbss%u", ((size)?"":"zo_"), |
8e79e9d4 | 2407 | (unsigned) l2align); |
2408 | /* We can't anchor (yet, if ever) in zerofill sections, because we can't | |
2409 | switch to them and emit a label. */ | |
2410 | flags = SECTION_BSS|SECTION_WRITE|SECTION_NO_ANCHOR; | |
2411 | in_section = get_section (secnam, flags, NULL); | |
2412 | fprintf (fp, "\t.zerofill %s,", secnam); | |
2413 | assemble_name (fp, name); | |
2414 | if (!size) | |
2415 | size = 1; | |
2416 | ||
2417 | if (l2align) | |
f03df321 | 2418 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", |
8e79e9d4 | 2419 | size, (unsigned) l2align); |
2420 | else | |
f03df321 | 2421 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); |
8e79e9d4 | 2422 | } |
2423 | ||
2424 | (*targetm.encode_section_info) (decl, DECL_RTL (decl), false); | |
2425 | /* This is defined as a file-scope var, so we know to notify machopic. */ | |
2426 | machopic_define_symbol (DECL_RTL (decl)); | |
2427 | } | |
2428 | ||
2429 | /* Emit a chunk of common. */ | |
2430 | static void | |
2431 | darwin_emit_common (FILE *fp, const char *name, | |
02dcca88 | 2432 | unsigned HOST_WIDE_INT size, unsigned int align) |
8e79e9d4 | 2433 | { |
2434 | unsigned HOST_WIDE_INT rounded; | |
2435 | unsigned int l2align; | |
427eb138 | 2436 | |
02dcca88 | 2437 | /* Earlier systems complain if the alignment exceeds the page size. |
8e79e9d4 | 2438 | The magic number is 4096 * 8 - hard-coded for legacy systems. */ |
2439 | if (!emit_aligned_common && (align > 32768UL)) | |
2440 | align = 4096UL; /* In units. */ | |
2441 | else | |
2442 | align /= BITS_PER_UNIT; | |
2443 | ||
2444 | /* Make sure we have a meaningful align. */ | |
2445 | if (!align) | |
2446 | align = 1; | |
2447 | ||
02dcca88 | 2448 | /* For earlier toolchains, we need to emit the var as a rounded size to |
8e79e9d4 | 2449 | tell ld the alignment. */ |
02dcca88 | 2450 | if (size < align) |
8e79e9d4 | 2451 | rounded = align; |
2452 | else | |
2453 | rounded = (size + (align-1)) & ~(align-1); | |
2454 | ||
2455 | l2align = floor_log2 (align); | |
2456 | gcc_assert (l2align <= L2_MAX_OFILE_ALIGNMENT); | |
2457 | ||
2458 | in_section = comm_section; | |
2459 | /* We mustn't allow multiple public symbols to share an address when using | |
2460 | the normal OSX toolchain. */ | |
2461 | if (!size) | |
2462 | { | |
2463 | /* Put at least one byte. */ | |
2464 | size = 1; | |
2465 | /* This section can no longer participate in section anchoring. */ | |
2466 | comm_section->common.flags |= SECTION_NO_ANCHOR; | |
2467 | } | |
2468 | ||
2469 | fputs ("\t.comm\t", fp); | |
2470 | assemble_name (fp, name); | |
02dcca88 | 2471 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED, |
8e79e9d4 | 2472 | emit_aligned_common?size:rounded); |
2473 | if (l2align && emit_aligned_common) | |
2474 | fprintf (fp, ",%u", l2align); | |
2475 | fputs ("\n", fp); | |
2476 | } | |
2477 | ||
2478 | /* Output a var which is all zero - into aligned BSS sections, common, lcomm | |
2479 | or coalescable data sections (for weak or comdat) as appropriate. */ | |
2480 | ||
2481 | void | |
2482 | darwin_output_aligned_bss (FILE *fp, tree decl, const char *name, | |
2483 | unsigned HOST_WIDE_INT size, unsigned int align) | |
2484 | { | |
2485 | unsigned int l2align; | |
2486 | bool one, pub, weak; | |
267785bc | 2487 | tree meta; |
8e79e9d4 | 2488 | |
2489 | pub = TREE_PUBLIC (decl); | |
2490 | one = DECL_ONE_ONLY (decl); | |
2491 | weak = (DECL_P (decl) | |
2492 | && DECL_WEAK (decl) | |
02dcca88 | 2493 | && !lookup_attribute ("weak_import", |
8e79e9d4 | 2494 | DECL_ATTRIBUTES (decl))); |
2495 | ||
2496 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2497 | fprintf (fp, "# albss: %s (%lld,%d) ro %d cst %d stat %d com %d" | |
2498 | " pub %d weak %d one %d init %lx\n", | |
02dcca88 | 2499 | name, (long long)size, (int)align, TREE_READONLY (decl), |
8e79e9d4 | 2500 | TREE_CONSTANT (decl), TREE_STATIC (decl), DECL_COMMON (decl), |
02dcca88 | 2501 | pub, weak, one, (unsigned long)DECL_INITIAL (decl)); |
8e79e9d4 | 2502 | #endif |
2503 | ||
02dcca88 | 2504 | /* ObjC metadata can get put in BSS because varasm.c decides it's BSS |
267785bc | 2505 | before the target has a chance to comment. */ |
2506 | if ((meta = is_objc_metadata (decl))) | |
2507 | { | |
2508 | darwin_emit_objc_zeroed (fp, decl, name, size, DECL_ALIGN (decl), meta); | |
2509 | return; | |
2510 | } | |
2511 | ||
8e79e9d4 | 2512 | /* Check that any initializer is valid. */ |
02dcca88 | 2513 | gcc_assert ((DECL_INITIAL (decl) == NULL) |
2514 | || (DECL_INITIAL (decl) == error_mark_node) | |
8e79e9d4 | 2515 | || initializer_zerop (DECL_INITIAL (decl))); |
2516 | ||
2517 | gcc_assert (DECL_SECTION_NAME (decl) == NULL); | |
2518 | gcc_assert (!DECL_COMMON (decl)); | |
2519 | ||
2520 | /* Pick up the correct alignment. */ | |
2521 | if (!size || !align) | |
2522 | align = DECL_ALIGN (decl); | |
2523 | ||
2524 | l2align = floor_log2 (align / BITS_PER_UNIT); | |
2525 | gcc_assert (l2align <= L2_MAX_OFILE_ALIGNMENT); | |
02dcca88 | 2526 | |
8e79e9d4 | 2527 | last_assemble_variable_decl = decl; |
2528 | ||
2529 | /* We would rather not have to check this here - but it seems that we might | |
2530 | be passed a decl that should be in coalesced space. */ | |
2531 | if (one || weak) | |
2532 | { | |
a967a7ec | 2533 | /* Weak or COMDAT objects are put in mergeable sections. */ |
02dcca88 | 2534 | darwin_emit_weak_or_comdat (fp, decl, name, size, |
f199808c | 2535 | ld_uses_coal_sects, DECL_ALIGN (decl)); |
8e79e9d4 | 2536 | return; |
02dcca88 | 2537 | } |
8e79e9d4 | 2538 | |
2539 | /* If this is not public, then emit according to local rules. */ | |
2540 | if (!pub) | |
2541 | { | |
02dcca88 | 2542 | darwin_emit_local_bss (fp, decl, name, size, l2align); |
8e79e9d4 | 2543 | return; |
2544 | } | |
2545 | ||
2546 | /* So we have a public symbol (small item fudge for Java, see above). */ | |
02dcca88 | 2547 | if ((DARWIN_SECTION_ANCHORS && flag_section_anchors && size < BYTES_ZFILL) |
8e79e9d4 | 2548 | || (size && size <= 2)) |
2549 | { | |
2550 | /* Put smaller objects in data, where the section anchors system can get | |
02dcca88 | 2551 | them. However, if they are zero-sized punt them to yet a different |
8e79e9d4 | 2552 | section (that is not allowed to participate in anchoring). */ |
2553 | if (!size) | |
2554 | { | |
2555 | fputs ("\t.section\t__DATA,__zobj_data\n", fp); | |
2556 | in_section = darwin_sections[zobj_data_section]; | |
2557 | size = 1; | |
2558 | } | |
2559 | else | |
2560 | { | |
2561 | fputs ("\t.data\n", fp); | |
2562 | in_section = data_section; | |
2563 | } | |
2564 | ||
2565 | if (l2align) | |
2566 | fprintf (fp, "\t.align\t%u\n", l2align); | |
2567 | ||
2568 | assemble_name (fp, name); | |
f03df321 | 2569 | fprintf (fp, ":\n\t.space\t" HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); |
8e79e9d4 | 2570 | } |
02dcca88 | 2571 | else |
8e79e9d4 | 2572 | { |
2573 | char secnam[64]; | |
2574 | unsigned int flags ; | |
2575 | /* When we are on a non-section anchor target, we can get zero-sized | |
2576 | items here. However, all we need to do is to bump them to one byte | |
2577 | and the section alignment will take care of the rest. */ | |
2578 | snprintf (secnam, 64, "__DATA,__%spu_bss%u", ((size)?"":"zo_"), l2align); | |
2579 | ||
2580 | /* We can't anchor in zerofill sections, because we can't switch | |
2581 | to them and emit a label. */ | |
2582 | flags = SECTION_BSS|SECTION_WRITE|SECTION_NO_ANCHOR; | |
2583 | in_section = get_section (secnam, flags, NULL); | |
2584 | fprintf (fp, "\t.zerofill %s,", secnam); | |
2585 | assemble_name (fp, name); | |
2586 | if (!size) | |
2587 | size = 1; | |
2588 | ||
2589 | if (l2align) | |
f03df321 | 2590 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", size, l2align); |
8e79e9d4 | 2591 | else |
f03df321 | 2592 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); |
8e79e9d4 | 2593 | } |
2594 | (* targetm.encode_section_info) (decl, DECL_RTL (decl), false); | |
2595 | } | |
2596 | ||
2597 | /* Output a chunk of common, with alignment specified (where the target | |
2598 | supports this). */ | |
2599 | void | |
2600 | darwin_asm_output_aligned_decl_common (FILE *fp, tree decl, const char *name, | |
02dcca88 | 2601 | unsigned HOST_WIDE_INT size, |
8e79e9d4 | 2602 | unsigned int align) |
2603 | { | |
2604 | unsigned int l2align; | |
2605 | bool one, weak; | |
267785bc | 2606 | tree meta; |
2607 | ||
8e79e9d4 | 2608 | /* No corresponding var. */ |
2609 | if (decl==NULL) | |
2610 | { | |
2611 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
02dcca88 | 2612 | fprintf (fp, "# adcom: %s (%d,%d) decl=0x0\n", name, (int)size, (int)align); |
8e79e9d4 | 2613 | #endif |
2614 | darwin_emit_common (fp, name, size, align); | |
2615 | return; | |
2616 | } | |
2617 | ||
2618 | one = DECL_ONE_ONLY (decl); | |
2619 | weak = (DECL_P (decl) | |
2620 | && DECL_WEAK (decl) | |
02dcca88 | 2621 | && !lookup_attribute ("weak_import", |
8e79e9d4 | 2622 | DECL_ATTRIBUTES (decl))); |
2623 | ||
2624 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2625 | fprintf (fp, "# adcom: %s (%lld,%d) ro %d cst %d stat %d com %d pub %d" | |
2626 | " weak %d one %d init %lx\n", | |
02dcca88 | 2627 | name, (long long)size, (int)align, TREE_READONLY (decl), |
8e79e9d4 | 2628 | TREE_CONSTANT (decl), TREE_STATIC (decl), DECL_COMMON (decl), |
02dcca88 | 2629 | TREE_PUBLIC (decl), weak, one, (unsigned long)DECL_INITIAL (decl)); |
8e79e9d4 | 2630 | #endif |
2631 | ||
02dcca88 | 2632 | /* ObjC metadata can get put in BSS because varasm.c decides it's BSS |
267785bc | 2633 | before the target has a chance to comment. */ |
2634 | if ((meta = is_objc_metadata (decl))) | |
2635 | { | |
2636 | darwin_emit_objc_zeroed (fp, decl, name, size, DECL_ALIGN (decl), meta); | |
2637 | return; | |
2638 | } | |
2639 | ||
8e79e9d4 | 2640 | /* We shouldn't be messing with this if the decl has a section name. */ |
2641 | gcc_assert (DECL_SECTION_NAME (decl) == NULL); | |
2642 | ||
2643 | /* We would rather not have to check this here - but it seems that we might | |
2644 | be passed a decl that should be in coalesced space. */ | |
2645 | if (one || weak) | |
2646 | { | |
2647 | /* Weak or COMDAT objects are put in mergable sections. */ | |
02dcca88 | 2648 | darwin_emit_weak_or_comdat (fp, decl, name, size, |
f199808c | 2649 | ld_uses_coal_sects, DECL_ALIGN (decl)); |
8e79e9d4 | 2650 | return; |
02dcca88 | 2651 | } |
8e79e9d4 | 2652 | |
02dcca88 | 2653 | /* We should only get here for DECL_COMMON, with a zero init (and, in |
8e79e9d4 | 2654 | principle, only for public symbols too - although we deal with local |
2655 | ones below). */ | |
2656 | ||
2657 | /* Check the initializer is OK. */ | |
02dcca88 | 2658 | gcc_assert (DECL_COMMON (decl) |
2659 | && ((DECL_INITIAL (decl) == NULL) | |
2660 | || (DECL_INITIAL (decl) == error_mark_node) | |
8e79e9d4 | 2661 | || initializer_zerop (DECL_INITIAL (decl)))); |
2662 | ||
2663 | last_assemble_variable_decl = decl; | |
2664 | ||
02dcca88 | 2665 | if (!size || !align) |
8e79e9d4 | 2666 | align = DECL_ALIGN (decl); |
2667 | ||
2668 | l2align = floor_log2 (align / BITS_PER_UNIT); | |
2669 | /* Check we aren't asking for more aligment than the platform allows. */ | |
2670 | gcc_assert (l2align <= L2_MAX_OFILE_ALIGNMENT); | |
2671 | ||
2672 | if (TREE_PUBLIC (decl) != 0) | |
2673 | darwin_emit_common (fp, name, size, align); | |
2674 | else | |
02dcca88 | 2675 | darwin_emit_local_bss (fp, decl, name, size, l2align); |
8e79e9d4 | 2676 | } |
2677 | ||
2678 | /* Output a chunk of BSS with alignment specfied. */ | |
2679 | void | |
02dcca88 | 2680 | darwin_asm_output_aligned_decl_local (FILE *fp, tree decl, const char *name, |
2681 | unsigned HOST_WIDE_INT size, | |
8e79e9d4 | 2682 | unsigned int align) |
2683 | { | |
2684 | unsigned long l2align; | |
2685 | bool one, weak; | |
267785bc | 2686 | tree meta; |
8e79e9d4 | 2687 | |
2688 | one = DECL_ONE_ONLY (decl); | |
2689 | weak = (DECL_P (decl) | |
2690 | && DECL_WEAK (decl) | |
02dcca88 | 2691 | && !lookup_attribute ("weak_import", |
8e79e9d4 | 2692 | DECL_ATTRIBUTES (decl))); |
2693 | ||
2694 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2695 | fprintf (fp, "# adloc: %s (%lld,%d) ro %d cst %d stat %d one %d pub %d" | |
2696 | " weak %d init %lx\n", | |
02dcca88 | 2697 | name, (long long)size, (int)align, TREE_READONLY (decl), |
8e79e9d4 | 2698 | TREE_CONSTANT (decl), TREE_STATIC (decl), one, TREE_PUBLIC (decl), |
02dcca88 | 2699 | weak , (unsigned long)DECL_INITIAL (decl)); |
8e79e9d4 | 2700 | #endif |
2701 | ||
02dcca88 | 2702 | /* ObjC metadata can get put in BSS because varasm.c decides it's BSS |
267785bc | 2703 | before the target has a chance to comment. */ |
2704 | if ((meta = is_objc_metadata (decl))) | |
2705 | { | |
2706 | darwin_emit_objc_zeroed (fp, decl, name, size, DECL_ALIGN (decl), meta); | |
2707 | return; | |
2708 | } | |
2709 | ||
8e79e9d4 | 2710 | /* We shouldn't be messing with this if the decl has a section name. */ |
2711 | gcc_assert (DECL_SECTION_NAME (decl) == NULL); | |
2712 | ||
2713 | /* We would rather not have to check this here - but it seems that we might | |
2714 | be passed a decl that should be in coalesced space. */ | |
2715 | if (one || weak) | |
2716 | { | |
2717 | /* Weak or COMDAT objects are put in mergable sections. */ | |
02dcca88 | 2718 | darwin_emit_weak_or_comdat (fp, decl, name, size, |
f199808c | 2719 | ld_uses_coal_sects, DECL_ALIGN (decl)); |
8e79e9d4 | 2720 | return; |
02dcca88 | 2721 | } |
8e79e9d4 | 2722 | |
2723 | /* .. and it should be suitable for placement in local mem. */ | |
2724 | gcc_assert(!TREE_PUBLIC (decl) && !DECL_COMMON (decl)); | |
2725 | /* .. and any initializer must be all-zero. */ | |
02dcca88 | 2726 | gcc_assert ((DECL_INITIAL (decl) == NULL) |
2727 | || (DECL_INITIAL (decl) == error_mark_node) | |
8e79e9d4 | 2728 | || initializer_zerop (DECL_INITIAL (decl))); |
2729 | ||
2730 | last_assemble_variable_decl = decl; | |
2731 | ||
2732 | if (!size || !align) | |
2733 | align = DECL_ALIGN (decl); | |
2734 | ||
2735 | l2align = floor_log2 (align / BITS_PER_UNIT); | |
2736 | gcc_assert (l2align <= L2_MAX_OFILE_ALIGNMENT); | |
2737 | ||
2738 | darwin_emit_local_bss (fp, decl, name, size, l2align); | |
427eb138 | 2739 | } |
2740 | ||
2c5b6111 | 2741 | /* Emit an assembler directive to set visibility for a symbol. The |
2742 | only supported visibilities are VISIBILITY_DEFAULT and | |
2743 | VISIBILITY_HIDDEN; the latter corresponds to Darwin's "private | |
2744 | extern". There is no MACH-O equivalent of ELF's | |
2745 | VISIBILITY_INTERNAL or VISIBILITY_PROTECTED. */ | |
2746 | ||
b215c058 | 2747 | void |
2c5b6111 | 2748 | darwin_assemble_visibility (tree decl, int vis) |
2749 | { | |
2750 | if (vis == VISIBILITY_DEFAULT) | |
2751 | ; | |
a115dd2c | 2752 | else if (vis == VISIBILITY_HIDDEN || vis == VISIBILITY_INTERNAL) |
2c5b6111 | 2753 | { |
2754 | fputs ("\t.private_extern ", asm_out_file); | |
2755 | assemble_name (asm_out_file, | |
2756 | (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)))); | |
2757 | fputs ("\n", asm_out_file); | |
2758 | } | |
2759 | else | |
a115dd2c | 2760 | warning (OPT_Wattributes, "protected visibility attribute " |
9b2d6d13 | 2761 | "not supported in this configuration; ignored"); |
2c5b6111 | 2762 | } |
2763 | ||
f1f41a6c | 2764 | /* vec used by darwin_asm_dwarf_section. |
edea89b9 | 2765 | Maybe a hash tab would be better here - but the intention is that this is |
02dcca88 | 2766 | a very short list (fewer than 16 items) and each entry should (ideally, |
edea89b9 | 2767 | eventually) only be presented once. |
2768 | ||
2769 | A structure to hold a dwarf debug section used entry. */ | |
2770 | ||
2771 | typedef struct GTY(()) dwarf_sect_used_entry { | |
2772 | const char *name; | |
2773 | unsigned count; | |
2774 | } | |
2775 | dwarf_sect_used_entry; | |
2776 | ||
edea89b9 | 2777 | |
2778 | /* A list of used __DWARF sections. */ | |
f1f41a6c | 2779 | static GTY (()) vec<dwarf_sect_used_entry, va_gc> *dwarf_sect_names_table; |
edea89b9 | 2780 | |
02dcca88 | 2781 | /* This is called when we are asked to assemble a named section and the |
edea89b9 | 2782 | name begins with __DWARF,. We keep a list of the section names (without |
2783 | the __DWARF, prefix) and use this to emit our required start label on the | |
2784 | first switch to each section. */ | |
2785 | ||
2786 | static void | |
2787 | darwin_asm_dwarf_section (const char *name, unsigned int flags, | |
7b53e714 | 2788 | tree ARG_UNUSED (decl), bool is_for_lto) |
edea89b9 | 2789 | { |
2790 | unsigned i; | |
7b53e714 | 2791 | int namelen, extra = 0; |
2792 | const char *sect, *lto_add = ""; | |
2793 | char sname[64]; | |
edea89b9 | 2794 | dwarf_sect_used_entry *ref; |
2795 | bool found = false; | |
7b53e714 | 2796 | |
2797 | gcc_checking_assert ((flags & (SECTION_DEBUG | SECTION_NAMED)) | |
2798 | == (SECTION_DEBUG | SECTION_NAMED)); | |
2799 | ||
2800 | /* We know that the name starts with __DWARF, or __GNU_DAWRF_LTO */ | |
2801 | sect = strchr (name, ',') + 1; | |
2802 | namelen = strchr (sect, ',') - sect; | |
2803 | gcc_checking_assert (namelen); | |
2804 | ||
2805 | /* The section switch is output as written... */ | |
2806 | fprintf (asm_out_file, "\t.section %s\n", name); | |
2807 | ||
2808 | /* ... but the string we keep to make section start labels needs | |
2809 | adjustment for lto cases. */ | |
2810 | if (is_for_lto) | |
2811 | { | |
2812 | lto_add = "_lto"; | |
2813 | extra = 4; | |
2814 | } | |
2815 | ||
2816 | snprintf (sname, 64, "%.*s%.*s", namelen, sect, extra, lto_add); | |
2817 | namelen += extra; | |
2818 | ||
edea89b9 | 2819 | if (dwarf_sect_names_table == NULL) |
f1f41a6c | 2820 | vec_alloc (dwarf_sect_names_table, 16); |
edea89b9 | 2821 | else |
02dcca88 | 2822 | for (i = 0; |
f1f41a6c | 2823 | dwarf_sect_names_table->iterate (i, &ref); |
edea89b9 | 2824 | i++) |
2825 | { | |
2826 | if (!ref) | |
2827 | break; | |
2828 | if (!strcmp (ref->name, sname)) | |
2829 | { | |
2830 | found = true; | |
2831 | ref->count++; | |
2832 | break; | |
2833 | } | |
2834 | } | |
2835 | ||
edea89b9 | 2836 | if (!found) |
2837 | { | |
2838 | dwarf_sect_used_entry e; | |
2839 | fprintf (asm_out_file, "Lsection%.*s:\n", namelen, sname); | |
2840 | e.count = 1; | |
2841 | e.name = xstrdup (sname); | |
f1f41a6c | 2842 | vec_safe_push (dwarf_sect_names_table, e); |
edea89b9 | 2843 | } |
2844 | } | |
2845 | ||
a08b74c8 | 2846 | /* Output a difference of two labels that will be an assembly time |
2847 | constant if the two labels are local. (.long lab1-lab2 will be | |
2848 | very different if lab1 is at the boundary between two sections; it | |
2849 | will be relocated according to the second section, not the first, | |
2850 | so one ends up with a difference between labels in different | |
2851 | sections, which is bad in the dwarf2 eh context for instance.) */ | |
2852 | ||
2853 | static int darwin_dwarf_label_counter; | |
2854 | ||
2855 | void | |
85d3e3b5 | 2856 | darwin_asm_output_dwarf_delta (FILE *file, int size, |
e1719e76 | 2857 | const char *lab1, const char *lab2, |
2858 | HOST_WIDE_INT offset) | |
a08b74c8 | 2859 | { |
2f9fc8ef | 2860 | int islocaldiff = (lab1[0] == '*' && lab1[1] == 'L' |
2861 | && lab2[0] == '*' && lab2[1] == 'L'); | |
dcf3c3f7 | 2862 | const char *directive = (size == 8 ? ".quad" : ".long"); |
a08b74c8 | 2863 | |
2864 | if (islocaldiff) | |
2865 | fprintf (file, "\t.set L$set$%d,", darwin_dwarf_label_counter); | |
2866 | else | |
85d3e3b5 | 2867 | fprintf (file, "\t%s\t", directive); |
8e79e9d4 | 2868 | |
48126f0c | 2869 | assemble_name_raw (file, lab1); |
a08b74c8 | 2870 | fprintf (file, "-"); |
48126f0c | 2871 | assemble_name_raw (file, lab2); |
e1719e76 | 2872 | if (offset != 0) |
2873 | fprintf (file, "+" HOST_WIDE_INT_PRINT_DEC, offset); | |
a08b74c8 | 2874 | if (islocaldiff) |
85d3e3b5 | 2875 | fprintf (file, "\n\t%s L$set$%d", directive, darwin_dwarf_label_counter++); |
a08b74c8 | 2876 | } |
d08d29c0 | 2877 | |
d08d29c0 | 2878 | /* Output an offset in a DWARF section on Darwin. On Darwin, DWARF section |
2879 | offsets are not represented using relocs in .o files; either the | |
2880 | section never leaves the .o file, or the linker or other tool is | |
2881 | responsible for parsing the DWARF and updating the offsets. */ | |
2882 | ||
2883 | void | |
2884 | darwin_asm_output_dwarf_offset (FILE *file, int size, const char * lab, | |
e1719e76 | 2885 | HOST_WIDE_INT offset, section *base) |
d08d29c0 | 2886 | { |
2887 | char sname[64]; | |
7b53e714 | 2888 | int namelen, extra = 0; |
2889 | bool is_for_lto; | |
2890 | const char *lto_add = ""; | |
2891 | ||
2892 | gcc_checking_assert (base->common.flags & SECTION_NAMED); | |
2893 | is_for_lto = strncmp (base->named.name, "__GNU_DWARF_LTO,", 16) == 0; | |
2894 | gcc_checking_assert (is_for_lto | |
2895 | || strncmp (base->named.name, "__DWARF,", 8) == 0); | |
2896 | const char *name = strchr (base->named.name, ',') + 1; | |
2897 | gcc_checking_assert (name); | |
2898 | ||
2899 | namelen = strchr (name, ',') - (name); | |
2900 | if (is_for_lto) | |
2901 | { | |
2902 | lto_add = "_lto"; | |
2903 | extra = 4; | |
2904 | } | |
2905 | snprintf (sname, 64, "*Lsection%.*s%.*s", namelen, name, extra, lto_add); | |
e1719e76 | 2906 | darwin_asm_output_dwarf_delta (file, size, lab, sname, offset); |
d08d29c0 | 2907 | } |
a08b74c8 | 2908 | |
13e2f0a0 | 2909 | /* Called from the within the TARGET_ASM_FILE_START for each target. */ |
edea89b9 | 2910 | |
2911 | void | |
2912 | darwin_file_start (void) | |
2913 | { | |
13e2f0a0 | 2914 | /* Nothing to do. */ |
edea89b9 | 2915 | } |
2916 | ||
2917 | /* Called for the TARGET_ASM_FILE_END hook. | |
2918 | Emit the mach-o pic indirection data, the lto data and, finally a flag | |
2919 | to tell the linker that it can break the file object into sections and | |
2920 | move those around for efficiency. */ | |
2921 | ||
f6940372 | 2922 | void |
b40da9a7 | 2923 | darwin_file_end (void) |
f6940372 | 2924 | { |
4b313269 | 2925 | if (!vec_safe_is_empty (ctors)) |
ed161dab | 2926 | finalize_ctors (); |
2927 | if (!vec_safe_is_empty (dtors)) | |
2928 | finalize_dtors (); | |
236ce1d1 | 2929 | |
2930 | /* If we are expecting to output NeXT ObjC meta-data, (and we actually see | |
2931 | some) then we output the fix-and-continue marker (Image Info). | |
2932 | This applies to Objective C, Objective C++ and LTO with either language | |
2933 | as part of the input. */ | |
2934 | if (flag_next_runtime && objc_metadata_seen) | |
2935 | { | |
2936 | unsigned int flags = 0; | |
2937 | if (flag_objc_abi >= 2) | |
2938 | { | |
2939 | flags = 16; | |
b46047af | 2940 | switch_to_section (darwin_sections[objc2_image_info_section]); |
236ce1d1 | 2941 | } |
2942 | else | |
b46047af | 2943 | switch_to_section (darwin_sections[objc_image_info_section]); |
236ce1d1 | 2944 | |
2945 | ASM_OUTPUT_ALIGN (asm_out_file, 2); | |
2946 | fputs ("L_OBJC_ImageInfo:\n", asm_out_file); | |
2947 | ||
2948 | flags |= (flag_replace_objc_classes && classes_seen) ? 1 : 0; | |
2949 | flags |= flag_objc_gc ? 2 : 0; | |
2950 | ||
2951 | fprintf (asm_out_file, "\t.long\t0\n\t.long\t%u\n", flags); | |
2952 | } | |
2953 | ||
f6940372 | 2954 | machopic_finish (asm_out_file); |
3a4a2292 | 2955 | if (lang_GNU_CXX ()) |
f6940372 | 2956 | { |
92e4ba7d | 2957 | switch_to_section (darwin_sections[constructor_section]); |
2958 | switch_to_section (darwin_sections[destructor_section]); | |
f6940372 | 2959 | ASM_OUTPUT_ALIGN (asm_out_file, 1); |
2960 | } | |
23433d72 | 2961 | |
2962 | /* If there was LTO assembler output, append it to asm_out_file. */ | |
2963 | if (lto_asm_out_name) | |
2964 | { | |
2965 | int n; | |
2966 | char *buf, *lto_asm_txt; | |
2967 | ||
2968 | /* Shouldn't be here if we failed to switch back. */ | |
2969 | gcc_assert (! saved_asm_out_file); | |
2970 | ||
2971 | lto_asm_out_file = fopen (lto_asm_out_name, "r"); | |
2972 | if (lto_asm_out_file == NULL) | |
c05be867 | 2973 | fatal_error (input_location, |
2974 | "failed to open temporary file %s with LTO output", | |
23433d72 | 2975 | lto_asm_out_name); |
2976 | fseek (lto_asm_out_file, 0, SEEK_END); | |
2977 | n = ftell (lto_asm_out_file); | |
2978 | if (n > 0) | |
2979 | { | |
2980 | fseek (lto_asm_out_file, 0, SEEK_SET); | |
2981 | lto_asm_txt = buf = (char *) xmalloc (n + 1); | |
2982 | while (fgets (lto_asm_txt, n, lto_asm_out_file)) | |
2983 | fputs (lto_asm_txt, asm_out_file); | |
13e2f0a0 | 2984 | /* Put a termination label. */ |
2985 | fprintf (asm_out_file, "\t.section %s,%s,regular,debug\n", | |
2986 | LTO_SEGMENT_NAME, LTO_SECTS_SECTION); | |
2987 | fprintf (asm_out_file, "L_GNU_LTO%d:\t;# end of lto\n", | |
2988 | lto_section_num); | |
2989 | /* Make sure our termination label stays in this section. */ | |
2990 | fputs ("\t.space\t1\n", asm_out_file); | |
23433d72 | 2991 | } |
2992 | ||
2993 | /* Remove the temporary file. */ | |
2994 | fclose (lto_asm_out_file); | |
2995 | unlink_if_ordinary (lto_asm_out_name); | |
2996 | free (lto_asm_out_name); | |
2997 | } | |
2998 | ||
13e2f0a0 | 2999 | /* Output the names and indices. */ |
f1f41a6c | 3000 | if (lto_section_names && lto_section_names->length ()) |
23433d72 | 3001 | { |
13e2f0a0 | 3002 | int count; |
3003 | darwin_lto_section_e *ref; | |
3004 | /* For now, we'll make the offsets 4 bytes and unaligned - we'll fix | |
3005 | the latter up ourselves. */ | |
3006 | const char *op = integer_asm_op (4,0); | |
3007 | ||
3008 | /* Emit the names. */ | |
3009 | fprintf (asm_out_file, "\t.section %s,%s,regular,debug\n", | |
23433d72 | 3010 | LTO_SEGMENT_NAME, LTO_NAMES_SECTION); |
f1f41a6c | 3011 | FOR_EACH_VEC_ELT (*lto_section_names, count, ref) |
13e2f0a0 | 3012 | { |
3013 | fprintf (asm_out_file, "L_GNU_LTO_NAME%d:\n", count); | |
3014 | /* We have to jump through hoops to get the values of the intra-section | |
3015 | offsets... */ | |
3016 | fprintf (asm_out_file, | |
3017 | "\t.set L$gnu$lto$noff%d,L_GNU_LTO_NAME%d-L_GNU_LTO_NAME0\n", | |
3018 | count, count); | |
3019 | fprintf (asm_out_file, | |
3020 | "\t.set L$gnu$lto$nsiz%d,L_GNU_LTO_NAME%d-L_GNU_LTO_NAME%d\n", | |
3021 | count, count+1, count); | |
3022 | fprintf (asm_out_file, "\t.asciz\t\"%s\"\n", ref->sectname); | |
3023 | } | |
3024 | fprintf (asm_out_file, "L_GNU_LTO_NAME%d:\t;# end\n", lto_section_num); | |
3025 | /* make sure our termination label stays in this section. */ | |
3026 | fputs ("\t.space\t1\n", asm_out_file); | |
3027 | ||
3028 | /* Emit the Index. */ | |
3029 | fprintf (asm_out_file, "\t.section %s,%s,regular,debug\n", | |
3030 | LTO_SEGMENT_NAME, LTO_INDEX_SECTION); | |
3031 | fputs ("\t.align\t2\n", asm_out_file); | |
3032 | fputs ("# Section offset, Section length, Name offset, Name length\n", | |
3033 | asm_out_file); | |
f1f41a6c | 3034 | FOR_EACH_VEC_ELT (*lto_section_names, count, ref) |
13e2f0a0 | 3035 | { |
3036 | fprintf (asm_out_file, "%s L$gnu$lto$offs%d\t;# %s\n", | |
3037 | op, count, ref->sectname); | |
3038 | fprintf (asm_out_file, "%s L$gnu$lto$size%d\n", op, count); | |
3039 | fprintf (asm_out_file, "%s L$gnu$lto$noff%d\n", op, count); | |
3040 | fprintf (asm_out_file, "%s L$gnu$lto$nsiz%d\n", op, count); | |
3041 | } | |
23433d72 | 3042 | } |
23433d72 | 3043 | |
8e79e9d4 | 3044 | /* If we have section anchors, then we must prevent the linker from |
3045 | re-arranging data. */ | |
3046 | if (!DARWIN_SECTION_ANCHORS || !flag_section_anchors) | |
3047 | fprintf (asm_out_file, "\t.subsections_via_symbols\n"); | |
f6940372 | 3048 | } |
3049 | ||
5b182752 | 3050 | /* TODO: Add a language hook for identifying if a decl is a vtable. */ |
3051 | #define DARWIN_VTABLE_P(DECL) 0 | |
3052 | ||
0765d519 | 3053 | /* Cross-module name binding. Darwin does not support overriding |
5b182752 | 3054 | functions at dynamic-link time, except for vtables in kexts. */ |
0765d519 | 3055 | |
3056 | bool | |
a9f1838b | 3057 | darwin_binds_local_p (const_tree decl) |
0765d519 | 3058 | { |
5b182752 | 3059 | return default_binds_local_p_1 (decl, |
3060 | TARGET_KEXTABI && DARWIN_VTABLE_P (decl)); | |
0765d519 | 3061 | } |
3062 | ||
8c27005f | 3063 | /* The Darwin's implementation of TARGET_ASM_OUTPUT_ANCHOR. Define the |
3064 | anchor relative to ".", the current section position. We cannot use | |
3065 | the default one because ASM_OUTPUT_DEF is wrong for Darwin. */ | |
8c27005f | 3066 | void |
3067 | darwin_asm_output_anchor (rtx symbol) | |
3068 | { | |
3069 | fprintf (asm_out_file, "\t.set\t"); | |
3070 | assemble_name (asm_out_file, XSTR (symbol, 0)); | |
3071 | fprintf (asm_out_file, ", . + " HOST_WIDE_INT_PRINT_DEC "\n", | |
3072 | SYMBOL_REF_BLOCK_OFFSET (symbol)); | |
3073 | } | |
8e79e9d4 | 3074 | |
8b1fba2c | 3075 | /* Disable section anchoring on any section containing a zero-sized |
8e79e9d4 | 3076 | object. */ |
3077 | bool | |
3078 | darwin_use_anchors_for_symbol_p (const_rtx symbol) | |
3079 | { | |
8b1fba2c | 3080 | if (DARWIN_SECTION_ANCHORS && flag_section_anchors) |
8e79e9d4 | 3081 | { |
3082 | section *sect; | |
3083 | /* If the section contains a zero-sized object it's ineligible. */ | |
3084 | sect = SYMBOL_REF_BLOCK (symbol)->sect; | |
3085 | /* This should have the effect of disabling anchors for vars that follow | |
8b1fba2c | 3086 | any zero-sized one, in a given section. */ |
8e79e9d4 | 3087 | if (sect->common.flags & SECTION_NO_ANCHOR) |
3088 | return false; | |
3089 | ||
8b1fba2c | 3090 | /* Also check the normal reasons for suppressing. */ |
3091 | return default_use_anchors_for_symbol_p (symbol); | |
8e79e9d4 | 3092 | } |
3093 | else | |
3094 | return false; | |
3095 | } | |
8c27005f | 3096 | |
f720b7c6 | 3097 | /* Set the darwin specific attributes on TYPE. */ |
3098 | void | |
3099 | darwin_set_default_type_attributes (tree type) | |
3100 | { | |
3101 | if (darwin_ms_struct | |
3102 | && TREE_CODE (type) == RECORD_TYPE) | |
3103 | TYPE_ATTRIBUTES (type) = tree_cons (get_identifier ("ms_struct"), | |
3104 | NULL_TREE, | |
3105 | TYPE_ATTRIBUTES (type)); | |
3106 | } | |
3107 | ||
26ac986e | 3108 | /* True, iff we're generating code for loadable kernel extensions. */ |
5b182752 | 3109 | |
3110 | bool | |
3111 | darwin_kextabi_p (void) { | |
3112 | return flag_apple_kext; | |
3113 | } | |
3114 | ||
3115 | void | |
3116 | darwin_override_options (void) | |
3117 | { | |
9e09909d | 3118 | /* Keep track of which (major) version we're generating code for. */ |
3119 | if (darwin_macosx_version_min) | |
3120 | { | |
3121 | if (strverscmp (darwin_macosx_version_min, "10.6") >= 0) | |
3122 | generating_for_darwin_version = 10; | |
3123 | else if (strverscmp (darwin_macosx_version_min, "10.5") >= 0) | |
3124 | generating_for_darwin_version = 9; | |
3125 | ||
3126 | /* Earlier versions are not specifically accounted, until required. */ | |
3127 | } | |
8e79e9d4 | 3128 | |
f199808c | 3129 | /* Older Darwin ld could not coalesce weak entities without them being |
3130 | placed in special sections. */ | |
3131 | if (darwin_target_linker | |
3132 | && (strverscmp (darwin_target_linker, MIN_LD64_NO_COAL_SECTS) < 0)) | |
3133 | ld_uses_coal_sects = true; | |
3134 | ||
3f3d5ad4 | 3135 | /* In principle, this should be c-family only. However, we really need to |
3136 | set sensible defaults for LTO as well, since the section selection stuff | |
3137 | should check for correctness re. the ABI. TODO: check and provide the | |
3138 | flags (runtime & ABI) from the lto wrapper). */ | |
3139 | ||
3140 | /* Unless set, force ABI=2 for NeXT and m64, 0 otherwise. */ | |
3141 | if (!global_options_set.x_flag_objc_abi) | |
3142 | global_options.x_flag_objc_abi | |
3143 | = (!flag_next_runtime) | |
3144 | ? 0 | |
3145 | : (TARGET_64BIT ? 2 | |
3146 | : (generating_for_darwin_version >= 9) ? 1 | |
3147 | : 0); | |
3148 | ||
3149 | /* Objective-C family ABI 2 is only valid for next/m64 at present. */ | |
3150 | if (global_options_set.x_flag_objc_abi && flag_next_runtime) | |
3151 | { | |
3152 | if (TARGET_64BIT && global_options.x_flag_objc_abi < 2) | |
3153 | error_at (UNKNOWN_LOCATION, "%<-fobjc-abi-version%> >= 2 must be" | |
3154 | " used for %<-m64%> targets with" | |
3155 | " %<-fnext-runtime%>"); | |
3156 | if (!TARGET_64BIT && global_options.x_flag_objc_abi >= 2) | |
3157 | error_at (UNKNOWN_LOCATION, "%<-fobjc-abi-version%> >= 2 is not" | |
3158 | " supported on %<-m32%> targets with" | |
3159 | " %<-fnext-runtime%>"); | |
3160 | } | |
3161 | ||
02dcca88 | 3162 | /* Don't emit DWARF3/4 unless specifically selected. This is a |
024fa7dd | 3163 | workaround for tool bugs. */ |
02dcca88 | 3164 | if (!global_options_set.x_dwarf_strict) |
024fa7dd | 3165 | dwarf_strict = 1; |
052166fd | 3166 | if (!global_options_set.x_dwarf_version) |
3167 | dwarf_version = 2; | |
024fa7dd | 3168 | |
8284d341 | 3169 | if (global_options_set.x_dwarf_split_debug_info) |
3170 | { | |
3171 | inform (input_location, | |
2f6d557f | 3172 | "%<-gsplit-dwarf%> is not supported on this platform, ignored"); |
8284d341 | 3173 | dwarf_split_debug_info = 0; |
3174 | global_options_set.x_dwarf_split_debug_info = 0; | |
3175 | } | |
3176 | ||
02dcca88 | 3177 | /* Do not allow unwind tables to be generated by default for m32. |
9e09909d | 3178 | fnon-call-exceptions will override this, regardless of what we do. */ |
3179 | if (generating_for_darwin_version < 10 | |
3180 | && !global_options_set.x_flag_asynchronous_unwind_tables | |
3181 | && !TARGET_64BIT) | |
3182 | global_options.x_flag_asynchronous_unwind_tables = 0; | |
3183 | ||
5886e9ab | 3184 | /* Disable -freorder-blocks-and-partition when unwind tables are being |
3185 | emitted for Darwin < 9 (OSX 10.5). | |
3186 | The strategy is, "Unless the User has specifically set/unset an unwind | |
3187 | flag we will switch off -freorder-blocks-and-partition when unwind tables | |
3188 | will be generated". If the User specifically sets flags... we assume | |
3189 | (s)he knows why... */ | |
3b3edcd4 | 3190 | if (generating_for_darwin_version < 9 |
9e09909d | 3191 | && global_options_set.x_flag_reorder_blocks_and_partition |
3192 | && ((global_options.x_flag_exceptions /* User, c++, java */ | |
3193 | && !global_options_set.x_flag_exceptions) /* User specified... */ | |
3194 | || (global_options.x_flag_unwind_tables | |
5886e9ab | 3195 | && !global_options_set.x_flag_unwind_tables) |
9e09909d | 3196 | || (global_options.x_flag_non_call_exceptions |
5886e9ab | 3197 | && !global_options_set.x_flag_non_call_exceptions) |
9e09909d | 3198 | || (global_options.x_flag_asynchronous_unwind_tables |
5886e9ab | 3199 | && !global_options_set.x_flag_asynchronous_unwind_tables))) |
3200 | { | |
3201 | inform (input_location, | |
2f6d557f | 3202 | "%<-freorder-blocks-and-partition%> does not work with " |
3203 | "exceptions on this architecture"); | |
5886e9ab | 3204 | flag_reorder_blocks_and_partition = 0; |
3205 | flag_reorder_blocks = 1; | |
3206 | } | |
14325167 | 3207 | |
c60ecc90 | 3208 | /* FIXME: flag_objc_sjlj_exceptions is no longer needed since there is only |
3209 | one valid choice of exception scheme for each runtime. */ | |
3210 | if (!global_options_set.x_flag_objc_sjlj_exceptions) | |
02dcca88 | 3211 | global_options.x_flag_objc_sjlj_exceptions = |
c60ecc90 | 3212 | flag_next_runtime && !TARGET_64BIT; |
3213 | ||
3214 | /* FIXME: and this could be eliminated then too. */ | |
3215 | if (!global_options_set.x_flag_exceptions | |
3216 | && flag_objc_exceptions | |
3217 | && TARGET_64BIT) | |
3218 | flag_exceptions = 1; | |
3219 | ||
5b182752 | 3220 | if (flag_mkernel || flag_apple_kext) |
3221 | { | |
3222 | /* -mkernel implies -fapple-kext for C++ */ | |
3a4a2292 | 3223 | if (lang_GNU_CXX ()) |
5b182752 | 3224 | flag_apple_kext = 1; |
3225 | ||
3226 | flag_no_common = 1; | |
3227 | ||
3228 | /* No EH in kexts. */ | |
3229 | flag_exceptions = 0; | |
3230 | /* No -fnon-call-exceptions data in kexts. */ | |
3231 | flag_non_call_exceptions = 0; | |
8e79e9d4 | 3232 | /* so no tables either.. */ |
3233 | flag_unwind_tables = 0; | |
3234 | flag_asynchronous_unwind_tables = 0; | |
3cf7ab3b | 3235 | /* We still need to emit branch islands for kernel context. */ |
f7a9de44 | 3236 | darwin_picsymbol_stubs = true; |
5b182752 | 3237 | } |
8e79e9d4 | 3238 | |
3e1cce93 | 3239 | if (flag_var_tracking_uninit == 0 |
f067760b | 3240 | && generating_for_darwin_version >= 9 |
3241 | && (flag_gtoggle ? (debug_info_level == DINFO_LEVEL_NONE) | |
3242 | : (debug_info_level >= DINFO_LEVEL_NORMAL)) | |
3243 | && write_symbols == DWARF2_DEBUG) | |
3e1cce93 | 3244 | flag_var_tracking_uninit = flag_var_tracking; |
3cf7ab3b | 3245 | |
90ff10b3 | 3246 | if (MACHO_DYNAMIC_NO_PIC_P) |
3247 | { | |
3248 | if (flag_pic) | |
b7d1dec3 | 3249 | warning_at (UNKNOWN_LOCATION, 0, |
3250 | "%<-mdynamic-no-pic%> overrides %<-fpic%>, %<-fPIC%>," | |
3251 | " %<-fpie%> or %<-fPIE%>"); | |
90ff10b3 | 3252 | flag_pic = 0; |
3253 | } | |
3254 | else if (flag_pic == 1) | |
3255 | { | |
3256 | /* Darwin's -fpic is -fPIC. */ | |
3257 | flag_pic = 2; | |
3258 | } | |
3259 | ||
f7a9de44 | 3260 | /* Linkers >= ld64-62.1 (at least) are capable of making the necessary PIC |
3261 | indirections and we no longer need to emit pic symbol stubs. | |
02dcca88 | 3262 | However, if we are generating code for earlier ones (or for use in the |
f7a9de44 | 3263 | kernel) the stubs might still be required, and this will be set true. |
7e96ac5f | 3264 | If the user sets it on or off - then that takes precedence. |
3265 | ||
3266 | Linkers that don't need stubs, don't need the EH symbol markers either. | |
3267 | */ | |
f7a9de44 | 3268 | |
3269 | if (!global_options_set.x_darwin_picsymbol_stubs) | |
3270 | { | |
02dcca88 | 3271 | if (darwin_target_linker) |
7e96ac5f | 3272 | { |
3273 | if (strverscmp (darwin_target_linker, MIN_LD64_OMIT_STUBS) < 0) | |
3274 | { | |
3275 | darwin_picsymbol_stubs = true; | |
3276 | ld_needs_eh_markers = true; | |
3277 | } | |
02dcca88 | 3278 | } |
7e96ac5f | 3279 | else if (generating_for_darwin_version < 9) |
3280 | { | |
3281 | /* If we don't know the linker version and we're targeting an old | |
02dcca88 | 3282 | system, we know no better than to assume the use of an earlier |
7e96ac5f | 3283 | linker. */ |
f7a9de44 | 3284 | darwin_picsymbol_stubs = true; |
7e96ac5f | 3285 | ld_needs_eh_markers = true; |
3286 | } | |
f7a9de44 | 3287 | } |
3288 | else if (DARWIN_X86 && darwin_picsymbol_stubs && TARGET_64BIT) | |
3289 | { | |
3290 | inform (input_location, | |
3291 | "%<-mpic-symbol-stubs%> is not required for 64b code (ignored)"); | |
3292 | darwin_picsymbol_stubs = false; | |
3293 | } | |
3294 | ||
3295 | if (generating_for_darwin_version >= 9) | |
3296 | /* Later systems can support aligned common. */ | |
3297 | emit_aligned_common = true; | |
d4238e8b | 3298 | |
3299 | /* The c_dialect...() macros are not available to us here. */ | |
3300 | darwin_running_cxx = (strstr (lang_hooks.name, "C++") != 0); | |
5b182752 | 3301 | } |
3302 | ||
8158aa7e | 3303 | #if DARWIN_PPC |
3304 | /* Add $LDBL128 suffix to long double builtins for ppc darwin. */ | |
6aee6ac8 | 3305 | |
3306 | static void | |
8158aa7e | 3307 | darwin_patch_builtin (enum built_in_function fncode) |
6aee6ac8 | 3308 | { |
b9a16870 | 3309 | tree fn = builtin_decl_explicit (fncode); |
6aee6ac8 | 3310 | tree sym; |
3311 | char *newname; | |
3312 | ||
3313 | if (!fn) | |
3314 | return; | |
3315 | ||
3316 | sym = DECL_ASSEMBLER_NAME (fn); | |
d243d9c9 | 3317 | newname = ACONCAT (("_", IDENTIFIER_POINTER (sym), "$LDBL128", NULL)); |
3318 | ||
6aee6ac8 | 3319 | set_user_assembler_name (fn, newname); |
6aee6ac8 | 3320 | |
b9a16870 | 3321 | fn = builtin_decl_implicit (fncode); |
6aee6ac8 | 3322 | if (fn) |
3323 | set_user_assembler_name (fn, newname); | |
6aee6ac8 | 3324 | } |
3325 | ||
3326 | void | |
3327 | darwin_patch_builtins (void) | |
3328 | { | |
3329 | if (LONG_DOUBLE_TYPE_SIZE != 128) | |
3330 | return; | |
3331 | ||
3332 | #define PATCH_BUILTIN(fncode) darwin_patch_builtin (fncode); | |
d243d9c9 | 3333 | #define PATCH_BUILTIN_NO64(fncode) \ |
3334 | if (!TARGET_64BIT) \ | |
6aee6ac8 | 3335 | darwin_patch_builtin (fncode); |
d243d9c9 | 3336 | #define PATCH_BUILTIN_VARIADIC(fncode) \ |
3337 | if (!TARGET_64BIT \ | |
6aee6ac8 | 3338 | && (strverscmp (darwin_macosx_version_min, "10.3.9") >= 0)) \ |
3339 | darwin_patch_builtin (fncode); | |
3340 | #include "darwin-ppc-ldouble-patch.def" | |
3341 | #undef PATCH_BUILTIN | |
3342 | #undef PATCH_BUILTIN_NO64 | |
3343 | #undef PATCH_BUILTIN_VARIADIC | |
3344 | } | |
8158aa7e | 3345 | #endif |
6aee6ac8 | 3346 | |
d4238e8b | 3347 | /* CFStrings implementation. */ |
3348 | static GTY(()) tree cfstring_class_reference = NULL_TREE; | |
3349 | static GTY(()) tree cfstring_type_node = NULL_TREE; | |
3350 | static GTY(()) tree ccfstring_type_node = NULL_TREE; | |
3351 | static GTY(()) tree pccfstring_type_node = NULL_TREE; | |
3352 | static GTY(()) tree pcint_type_node = NULL_TREE; | |
3353 | static GTY(()) tree pcchar_type_node = NULL_TREE; | |
3354 | ||
820c090b | 3355 | static enum built_in_function darwin_builtin_cfstring; |
d4238e8b | 3356 | |
3357 | /* Store all constructed constant CFStrings in a hash table so that | |
3358 | they get uniqued properly. */ | |
3359 | ||
2ef51f0e | 3360 | typedef struct GTY ((for_user)) cfstring_descriptor { |
d4238e8b | 3361 | /* The string literal. */ |
3362 | tree literal; | |
3363 | /* The resulting constant CFString. */ | |
3364 | tree constructor; | |
3365 | } cfstring_descriptor; | |
3366 | ||
b594087e | 3367 | struct cfstring_hasher : ggc_ptr_hash<cfstring_descriptor> |
2ef51f0e | 3368 | { |
3369 | static hashval_t hash (cfstring_descriptor *); | |
3370 | static bool equal (cfstring_descriptor *, cfstring_descriptor *); | |
3371 | }; | |
d4238e8b | 3372 | |
2ef51f0e | 3373 | static GTY (()) hash_table<cfstring_hasher> *cfstring_htab; |
d4238e8b | 3374 | |
3375 | static tree | |
3376 | add_builtin_field_decl (tree type, const char *name, tree **chain) | |
3377 | { | |
02dcca88 | 3378 | tree field = build_decl (BUILTINS_LOCATION, FIELD_DECL, |
d4238e8b | 3379 | get_identifier (name), type); |
3380 | ||
3381 | if (*chain != NULL) | |
3382 | **chain = field; | |
3383 | *chain = &DECL_CHAIN (field); | |
3384 | ||
3385 | return field; | |
3386 | } | |
3387 | ||
820c090b | 3388 | tree |
3389 | darwin_init_cfstring_builtins (unsigned builtin_cfstring) | |
d4238e8b | 3390 | { |
3391 | tree cfsfun, fields, pccfstring_ftype_pcchar; | |
3392 | tree *chain = NULL; | |
3393 | ||
02dcca88 | 3394 | darwin_builtin_cfstring = |
820c090b | 3395 | (enum built_in_function) builtin_cfstring; |
02dcca88 | 3396 | |
d4238e8b | 3397 | /* struct __builtin_CFString { |
3398 | const int *isa; (will point at | |
3399 | int flags; __CFConstantStringClassReference) | |
3400 | const char *str; | |
3401 | long length; | |
3402 | }; */ | |
3403 | ||
02dcca88 | 3404 | pcint_type_node = build_pointer_type |
d4238e8b | 3405 | (build_qualified_type (integer_type_node, TYPE_QUAL_CONST)); |
3406 | ||
02dcca88 | 3407 | pcchar_type_node = build_pointer_type |
d4238e8b | 3408 | (build_qualified_type (char_type_node, TYPE_QUAL_CONST)); |
3409 | ||
3410 | cfstring_type_node = (*lang_hooks.types.make_type) (RECORD_TYPE); | |
3411 | ||
3412 | /* Have to build backwards for finish struct. */ | |
3413 | fields = add_builtin_field_decl (long_integer_type_node, "length", &chain); | |
3414 | add_builtin_field_decl (pcchar_type_node, "str", &chain); | |
3415 | add_builtin_field_decl (integer_type_node, "flags", &chain); | |
3416 | add_builtin_field_decl (pcint_type_node, "isa", &chain); | |
3417 | finish_builtin_struct (cfstring_type_node, "__builtin_CFString", | |
3418 | fields, NULL_TREE); | |
3419 | ||
3420 | /* const struct __builtin_CFstring * | |
3421 | __builtin___CFStringMakeConstantString (const char *); */ | |
3422 | ||
02dcca88 | 3423 | ccfstring_type_node = build_qualified_type |
d4238e8b | 3424 | (cfstring_type_node, TYPE_QUAL_CONST); |
3425 | pccfstring_type_node = build_pointer_type (ccfstring_type_node); | |
02dcca88 | 3426 | pccfstring_ftype_pcchar = build_function_type_list |
d4238e8b | 3427 | (pccfstring_type_node, pcchar_type_node, NULL_TREE); |
3428 | ||
02dcca88 | 3429 | cfsfun = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, |
d4238e8b | 3430 | get_identifier ("__builtin___CFStringMakeConstantString"), |
3431 | pccfstring_ftype_pcchar); | |
3432 | ||
3433 | TREE_PUBLIC (cfsfun) = 1; | |
3434 | DECL_EXTERNAL (cfsfun) = 1; | |
3435 | DECL_ARTIFICIAL (cfsfun) = 1; | |
3436 | /* Make a lang-specific section - dup_lang_specific_decl makes a new node | |
3437 | in place of the existing, which may be NULL. */ | |
3438 | DECL_LANG_SPECIFIC (cfsfun) = NULL; | |
3439 | (*lang_hooks.dup_lang_specific_decl) (cfsfun); | |
3440 | DECL_BUILT_IN_CLASS (cfsfun) = BUILT_IN_MD; | |
820c090b | 3441 | DECL_FUNCTION_CODE (cfsfun) = darwin_builtin_cfstring; |
d4238e8b | 3442 | lang_hooks.builtin_function (cfsfun); |
3443 | ||
3444 | /* extern int __CFConstantStringClassReference[]; */ | |
3445 | cfstring_class_reference = build_decl (BUILTINS_LOCATION, VAR_DECL, | |
3446 | get_identifier ("__CFConstantStringClassReference"), | |
3447 | build_array_type (integer_type_node, NULL_TREE)); | |
3448 | ||
3449 | TREE_PUBLIC (cfstring_class_reference) = 1; | |
3450 | DECL_ARTIFICIAL (cfstring_class_reference) = 1; | |
3451 | (*lang_hooks.decls.pushdecl) (cfstring_class_reference); | |
3452 | DECL_EXTERNAL (cfstring_class_reference) = 1; | |
3453 | rest_of_decl_compilation (cfstring_class_reference, 0, 0); | |
02dcca88 | 3454 | |
d4238e8b | 3455 | /* Initialize the hash table used to hold the constant CFString objects. */ |
2ef51f0e | 3456 | cfstring_htab = hash_table<cfstring_hasher>::create_ggc (31); |
820c090b | 3457 | |
3458 | return cfstring_type_node; | |
d4238e8b | 3459 | } |
3460 | ||
3461 | tree | |
02dcca88 | 3462 | darwin_fold_builtin (tree fndecl, int n_args, tree *argp, |
d4238e8b | 3463 | bool ARG_UNUSED (ignore)) |
3464 | { | |
3465 | unsigned int fcode = DECL_FUNCTION_CODE (fndecl); | |
02dcca88 | 3466 | |
820c090b | 3467 | if (fcode == darwin_builtin_cfstring) |
d4238e8b | 3468 | { |
3469 | if (!darwin_constant_cfstrings) | |
3470 | { | |
02dcca88 | 3471 | error ("built-in function %qD requires the" |
d4238e8b | 3472 | " %<-mconstant-cfstrings%> flag", fndecl); |
3473 | return error_mark_node; | |
3474 | } | |
3475 | ||
3476 | if (n_args != 1) | |
3477 | { | |
3478 | error ("built-in function %qD takes one argument only", fndecl); | |
3479 | return error_mark_node; | |
3480 | } | |
3481 | ||
3482 | return darwin_build_constant_cfstring (*argp); | |
3483 | } | |
3484 | ||
3485 | return NULL_TREE; | |
3486 | } | |
3487 | ||
f6829196 | 3488 | void |
3489 | darwin_rename_builtins (void) | |
3490 | { | |
3491 | /* The system ___divdc3 routine in libSystem on darwin10 is not | |
3492 | accurate to 1ulp, ours is, so we avoid ever using the system name | |
3493 | for this routine and instead install a non-conflicting name that | |
3494 | is accurate. | |
3495 | ||
3496 | When -ffast-math or -funsafe-math-optimizations is given, we can | |
3497 | use the faster version. */ | |
3498 | if (!flag_unsafe_math_optimizations) | |
3499 | { | |
b9a16870 | 3500 | enum built_in_function dcode |
3501 | = (enum built_in_function)(BUILT_IN_COMPLEX_DIV_MIN | |
3502 | + DCmode - MIN_MODE_COMPLEX_FLOAT); | |
3503 | tree fn = builtin_decl_explicit (dcode); | |
f6829196 | 3504 | /* Fortran and c call TARGET_INIT_BUILTINS and |
3505 | TARGET_INIT_LIBFUNCS at different times, so we have to put a | |
3506 | call into each to ensure that at least one of them is called | |
3507 | after build_common_builtin_nodes. A better fix is to add a | |
3508 | new hook to run after build_common_builtin_nodes runs. */ | |
3509 | if (fn) | |
3510 | set_user_assembler_name (fn, "___ieee_divdc3"); | |
b9a16870 | 3511 | fn = builtin_decl_implicit (dcode); |
f6829196 | 3512 | if (fn) |
3513 | set_user_assembler_name (fn, "___ieee_divdc3"); | |
3514 | } | |
3515 | } | |
3516 | ||
30f690e0 | 3517 | bool |
3518 | darwin_libc_has_function (enum function_class fn_class) | |
3519 | { | |
3520 | if (fn_class == function_sincos) | |
3521 | return false; | |
3522 | if (fn_class == function_c99_math_complex | |
3523 | || fn_class == function_c99_misc) | |
3524 | return (TARGET_64BIT | |
3525 | || strverscmp (darwin_macosx_version_min, "10.3") >= 0); | |
3526 | ||
3527 | return true; | |
3528 | } | |
3529 | ||
2ef51f0e | 3530 | hashval_t |
3531 | cfstring_hasher::hash (cfstring_descriptor *ptr) | |
d4238e8b | 3532 | { |
2ef51f0e | 3533 | tree str = ptr->literal; |
d4238e8b | 3534 | const unsigned char *p = (const unsigned char *) TREE_STRING_POINTER (str); |
3535 | int i, len = TREE_STRING_LENGTH (str); | |
3536 | hashval_t h = len; | |
3537 | ||
3538 | for (i = 0; i < len; i++) | |
3539 | h = ((h * 613) + p[i]); | |
3540 | ||
3541 | return h; | |
3542 | } | |
3543 | ||
2ef51f0e | 3544 | bool |
3545 | cfstring_hasher::equal (cfstring_descriptor *ptr1, cfstring_descriptor *ptr2) | |
d4238e8b | 3546 | { |
2ef51f0e | 3547 | tree str1 = ptr1->literal; |
3548 | tree str2 = ptr2->literal; | |
d4238e8b | 3549 | int len1 = TREE_STRING_LENGTH (str1); |
3550 | ||
3551 | return (len1 == TREE_STRING_LENGTH (str2) | |
3552 | && !memcmp (TREE_STRING_POINTER (str1), TREE_STRING_POINTER (str2), | |
3553 | len1)); | |
3554 | } | |
3555 | ||
3556 | tree | |
3557 | darwin_build_constant_cfstring (tree str) | |
3558 | { | |
3559 | struct cfstring_descriptor *desc, key; | |
d4238e8b | 3560 | tree addr; |
3561 | ||
3562 | if (!str) | |
3563 | { | |
3564 | error ("CFString literal is missing"); | |
3565 | return error_mark_node; | |
3566 | } | |
3567 | ||
3568 | STRIP_NOPS (str); | |
3569 | ||
3570 | if (TREE_CODE (str) == ADDR_EXPR) | |
3571 | str = TREE_OPERAND (str, 0); | |
3572 | ||
3573 | if (TREE_CODE (str) != STRING_CST) | |
3574 | { | |
3575 | error ("CFString literal expression is not a string constant"); | |
3576 | return error_mark_node; | |
3577 | } | |
3578 | ||
3579 | /* Perhaps we already constructed a constant CFString just like this one? */ | |
3580 | key.literal = str; | |
2ef51f0e | 3581 | cfstring_descriptor **loc = cfstring_htab->find_slot (&key, INSERT); |
3582 | desc = *loc; | |
d4238e8b | 3583 | |
3584 | if (!desc) | |
3585 | { | |
3586 | tree var, constructor, field; | |
f1f41a6c | 3587 | vec<constructor_elt, va_gc> *v = NULL; |
d4238e8b | 3588 | int length = TREE_STRING_LENGTH (str) - 1; |
3589 | ||
3590 | if (darwin_warn_nonportable_cfstrings) | |
3591 | { | |
3592 | const char *s = TREE_STRING_POINTER (str); | |
3593 | int l = 0; | |
3594 | ||
3595 | for (l = 0; l < length; l++) | |
3596 | if (!s[l] || !isascii (s[l])) | |
3597 | { | |
c1c6d679 | 3598 | warning (darwin_warn_nonportable_cfstrings, |
3599 | s[l] ? G_("non-ASCII character in CFString literal") | |
3600 | : G_("embedded NUL in CFString literal")); | |
d4238e8b | 3601 | break; |
3602 | } | |
3603 | } | |
3604 | ||
25a27413 | 3605 | *loc = desc = ggc_cleared_alloc<cfstring_descriptor> (); |
d4238e8b | 3606 | desc->literal = str; |
3607 | ||
3608 | /* isa *. */ | |
3609 | field = TYPE_FIELDS (ccfstring_type_node); | |
02dcca88 | 3610 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, |
3611 | build1 (ADDR_EXPR, TREE_TYPE (field), | |
d4238e8b | 3612 | cfstring_class_reference)); |
3613 | /* flags */ | |
3614 | field = DECL_CHAIN (field); | |
02dcca88 | 3615 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, |
d4238e8b | 3616 | build_int_cst (TREE_TYPE (field), 0x000007c8)); |
3617 | /* string *. */ | |
3618 | field = DECL_CHAIN (field); | |
3619 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, | |
3620 | build1 (ADDR_EXPR, TREE_TYPE (field), str)); | |
3621 | /* length */ | |
3622 | field = DECL_CHAIN (field); | |
3623 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, | |
3624 | build_int_cst (TREE_TYPE (field), length)); | |
3625 | ||
3626 | constructor = build_constructor (ccfstring_type_node, v); | |
3627 | TREE_READONLY (constructor) = 1; | |
3628 | TREE_CONSTANT (constructor) = 1; | |
3629 | TREE_STATIC (constructor) = 1; | |
3630 | ||
3631 | /* Fromage: The C++ flavor of 'build_unary_op' expects constructor nodes | |
3632 | to have the TREE_HAS_CONSTRUCTOR (...) bit set. However, this file is | |
3633 | being built without any knowledge of C++ tree accessors; hence, we shall | |
3634 | use the generic accessor that TREE_HAS_CONSTRUCTOR actually maps to! */ | |
3635 | if (darwin_running_cxx) | |
3636 | TREE_LANG_FLAG_4 (constructor) = 1; /* TREE_HAS_CONSTRUCTOR */ | |
3637 | ||
3638 | /* Create an anonymous global variable for this CFString. */ | |
02dcca88 | 3639 | var = build_decl (input_location, CONST_DECL, |
d4238e8b | 3640 | NULL, TREE_TYPE (constructor)); |
3641 | DECL_ARTIFICIAL (var) = 1; | |
3642 | TREE_STATIC (var) = 1; | |
3643 | DECL_INITIAL (var) = constructor; | |
3644 | /* FIXME: This should use a translation_unit_decl to indicate file scope. */ | |
3645 | DECL_CONTEXT (var) = NULL_TREE; | |
3646 | desc->constructor = var; | |
3647 | } | |
3648 | ||
3649 | addr = build1 (ADDR_EXPR, pccfstring_type_node, desc->constructor); | |
3650 | TREE_CONSTANT (addr) = 1; | |
3651 | ||
3652 | return addr; | |
3653 | } | |
3654 | ||
3655 | bool | |
3656 | darwin_cfstring_p (tree str) | |
3657 | { | |
3658 | struct cfstring_descriptor key; | |
d4238e8b | 3659 | |
3660 | if (!str) | |
3661 | return false; | |
3662 | ||
3663 | STRIP_NOPS (str); | |
3664 | ||
3665 | if (TREE_CODE (str) == ADDR_EXPR) | |
3666 | str = TREE_OPERAND (str, 0); | |
3667 | ||
3668 | if (TREE_CODE (str) != STRING_CST) | |
3669 | return false; | |
3670 | ||
3671 | key.literal = str; | |
2ef51f0e | 3672 | cfstring_descriptor **loc = cfstring_htab->find_slot (&key, NO_INSERT); |
02dcca88 | 3673 | |
d4238e8b | 3674 | if (loc) |
3675 | return true; | |
3676 | ||
3677 | return false; | |
3678 | } | |
3679 | ||
3680 | void | |
3681 | darwin_enter_string_into_cfstring_table (tree str) | |
3682 | { | |
3683 | struct cfstring_descriptor key; | |
d4238e8b | 3684 | |
3685 | key.literal = str; | |
2ef51f0e | 3686 | cfstring_descriptor **loc = cfstring_htab->find_slot (&key, INSERT); |
d4238e8b | 3687 | |
3688 | if (!*loc) | |
3689 | { | |
25a27413 | 3690 | *loc = ggc_cleared_alloc<cfstring_descriptor> (); |
d4238e8b | 3691 | ((struct cfstring_descriptor *)*loc)->literal = str; |
3692 | } | |
3693 | } | |
6aee6ac8 | 3694 | |
3b73548b | 3695 | /* Choose named function section based on its frequency. */ |
3696 | ||
3697 | section * | |
3698 | darwin_function_section (tree decl, enum node_frequency freq, | |
3699 | bool startup, bool exit) | |
3700 | { | |
9e09909d | 3701 | /* Decide if we need to put this in a coalescable section. */ |
f199808c | 3702 | bool weak = (decl |
9e09909d | 3703 | && DECL_WEAK (decl) |
3704 | && (!DECL_ATTRIBUTES (decl) | |
02dcca88 | 3705 | || !lookup_attribute ("weak_import", |
9e09909d | 3706 | DECL_ATTRIBUTES (decl)))); |
3707 | ||
f199808c | 3708 | bool use_coal = weak && ld_uses_coal_sects; |
9e09909d | 3709 | /* If there is a specified section name, we should not be trying to |
3710 | override. */ | |
738a6bda | 3711 | if (decl && DECL_SECTION_NAME (decl) != NULL) |
9e09909d | 3712 | return get_named_section (decl, NULL, 0); |
3713 | ||
0fbd1542 | 3714 | /* We always put unlikely executed stuff in the cold section. */ |
3715 | if (freq == NODE_FREQUENCY_UNLIKELY_EXECUTED) | |
f199808c | 3716 | return (use_coal) ? darwin_sections[text_cold_coal_section] |
3717 | : darwin_sections[text_cold_section]; | |
0fbd1542 | 3718 | |
3719 | /* If we have LTO *and* feedback information, then let LTO handle | |
3720 | the function ordering, it makes a better job (for normal, hot, | |
3721 | startup and exit - hence the bailout for cold above). */ | |
3722 | if (in_lto_p && flag_profile_values) | |
3723 | goto default_function_sections; | |
3724 | ||
3725 | /* Non-cold startup code should go to startup subsection. */ | |
3726 | if (startup) | |
f199808c | 3727 | return (use_coal) ? darwin_sections[text_startup_coal_section] |
3728 | : darwin_sections[text_startup_section]; | |
3b73548b | 3729 | |
3730 | /* Similarly for exit. */ | |
0fbd1542 | 3731 | if (exit) |
f199808c | 3732 | return (use_coal) ? darwin_sections[text_exit_coal_section] |
3733 | : darwin_sections[text_exit_section]; | |
0fbd1542 | 3734 | |
3735 | /* Place hot code. */ | |
3736 | if (freq == NODE_FREQUENCY_HOT) | |
f199808c | 3737 | return (use_coal) ? darwin_sections[text_hot_coal_section] |
3738 | : darwin_sections[text_hot_section]; | |
0fbd1542 | 3739 | |
3740 | /* Otherwise, default to the 'normal' non-reordered sections. */ | |
3741 | default_function_sections: | |
f199808c | 3742 | return (use_coal) ? darwin_sections[text_coal_section] |
3743 | : text_section; | |
3b73548b | 3744 | } |
3745 | ||
1f3233d1 | 3746 | #include "gt-darwin.h" |