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80d725d7 | 1 | /* Functions for generic Darwin as target machine for GNU C compiler. |
aad93da1 | 2 | Copyright (C) 1989-2017 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 | |
21 | #include "config.h" | |
22 | #include "system.h" | |
805e22b2 | 23 | #include "coretypes.h" |
9ef16211 | 24 | #include "backend.h" |
c1eb80de | 25 | #include "target.h" |
26 | #include "rtl.h" | |
9ef16211 | 27 | #include "tree.h" |
28 | #include "gimple.h" | |
c1eb80de | 29 | #include "cfghooks.h" |
9ef16211 | 30 | #include "df.h" |
ad7b10a2 | 31 | #include "memmodel.h" |
c1eb80de | 32 | #include "tm_p.h" |
33 | #include "stringpool.h" | |
30a86690 | 34 | #include "attribs.h" |
80d725d7 | 35 | #include "insn-config.h" |
c1eb80de | 36 | #include "emit-rtl.h" |
37 | #include "cgraph.h" | |
38 | #include "lto-streamer.h" | |
80d725d7 | 39 | #include "output.h" |
9ed99284 | 40 | #include "varasm.h" |
41 | #include "stor-layout.h" | |
d53441c8 | 42 | #include "explow.h" |
80d725d7 | 43 | #include "expr.h" |
d19bd1f0 | 44 | #include "langhooks.h" |
690abe5d | 45 | #include "toplev.h" |
47131315 | 46 | #include "lto-section-names.h" |
80d725d7 | 47 | |
f0ed0e8a | 48 | /* Darwin supports a feature called fix-and-continue, which is used |
49 | for rapid turn around debugging. When code is compiled with the | |
50 | -mfix-and-continue flag, two changes are made to the generated code | |
51 | that allow the system to do things that it would normally not be | |
52 | able to do easily. These changes allow gdb to load in | |
53 | recompilation of a translation unit that has been changed into a | |
54 | running program and replace existing functions and methods of that | |
cb4213cd | 55 | translation unit with versions of those functions and methods |
f0ed0e8a | 56 | from the newly compiled translation unit. The new functions access |
d188633a | 57 | the existing static symbols from the old translation unit, if the |
58 | symbol existed in the unit to be replaced, and from the new | |
59 | translation unit, otherwise. | |
f0ed0e8a | 60 | |
8063e558 | 61 | The changes are to insert 5 nops at the beginning of all functions |
d188633a | 62 | and to use indirection to get at static symbols. The 5 nops |
f0ed0e8a | 63 | are required by consumers of the generated code. Currently, gdb |
64 | uses this to patch in a jump to the overriding function, this | |
65 | allows all uses of the old name to forward to the replacement, | |
84cbcde5 | 66 | including existing function pointers and virtual methods. See |
f0ed0e8a | 67 | rs6000_emit_prologue for the code that handles the nop insertions. |
b215c058 | 68 | |
f0ed0e8a | 69 | The added indirection allows gdb to redirect accesses to static |
d188633a | 70 | symbols from the newly loaded translation unit to the existing |
71 | symbol, if any. @code{static} symbols are special and are handled by | |
72 | setting the second word in the .non_lazy_symbol_pointer data | |
73 | structure to symbol. See indirect_data for the code that handles | |
74 | the extra indirection, and machopic_output_indirection and its use | |
75 | of MACHO_SYMBOL_STATIC for the code that handles @code{static} | |
76 | symbol indirection. */ | |
f0ed0e8a | 77 | |
3cf7ab3b | 78 | /* For darwin >= 9 (OSX 10.5) the linker is capable of making the necessary |
79 | branch islands and we no longer need to emit darwin stubs. | |
80 | However, if we are generating code for earlier systems (or for use in the | |
81 | kernel) the stubs might still be required, and this will be set true. */ | |
82 | int darwin_emit_branch_islands = false; | |
83 | ||
ed161dab | 84 | typedef struct GTY(()) cdtor_record { |
4b313269 | 85 | rtx symbol; |
ed161dab | 86 | int priority; /* [con/de]structor priority */ |
4b313269 | 87 | int position; /* original position */ |
ed161dab | 88 | } cdtor_record; |
4b313269 | 89 | |
ed161dab | 90 | static GTY(()) vec<cdtor_record, va_gc> *ctors = NULL; |
91 | static GTY(()) vec<cdtor_record, va_gc> *dtors = NULL; | |
4b313269 | 92 | |
d4238e8b | 93 | /* A flag to determine whether we are running c++ or obj-c++. This has to be |
94 | settable from non-c-family contexts too (i.e. we can't use the c_dialect_ | |
95 | functions). */ | |
96 | int darwin_running_cxx; | |
97 | ||
9e09909d | 98 | /* Some code-gen now depends on OS major version numbers (at least). */ |
99 | int generating_for_darwin_version ; | |
100 | ||
f199808c | 101 | /* For older linkers we need to emit special sections (marked 'coalesced') for |
102 | for weak or single-definition items. */ | |
103 | static bool ld_uses_coal_sects = false; | |
104 | ||
92e4ba7d | 105 | /* Section names. */ |
106 | section * darwin_sections[NUM_DARWIN_SECTIONS]; | |
2f14b1f9 | 107 | |
90ff10b3 | 108 | /* While we transition to using in-tests instead of ifdef'd code. */ |
6cc3d6ec | 109 | #if !HAVE_lo_sum |
90ff10b3 | 110 | #define gen_macho_high(a,b) (a) |
111 | #define gen_macho_low(a,b,c) (a) | |
112 | #endif | |
113 | ||
f720b7c6 | 114 | /* True if we're setting __attribute__ ((ms_struct)). */ |
115 | int darwin_ms_struct = false; | |
116 | ||
8e79e9d4 | 117 | /* Earlier versions of Darwin as do not recognize an alignment field in |
118 | .comm directives, this should be set for versions that allow it. */ | |
119 | int emit_aligned_common = false; | |
120 | ||
2f14b1f9 | 121 | /* A get_unnamed_section callback used to switch to an ObjC section. |
122 | DIRECTIVE is as for output_section_asm_op. */ | |
123 | ||
124 | static void | |
125 | output_objc_section_asm_op (const void *directive) | |
126 | { | |
92e4ba7d | 127 | static bool been_here = false; |
2f14b1f9 | 128 | |
163c9fff | 129 | /* The NeXT ObjC Runtime requires these sections to be present and in |
130 | order in the object. The code below implements this by emitting | |
131 | a section header for each ObjC section the first time that an ObjC | |
132 | section is requested. */ | |
92e4ba7d | 133 | if (! been_here) |
2f14b1f9 | 134 | { |
c4796e8b | 135 | section *saved_in_section = in_section; |
b215c058 | 136 | static const enum darwin_section_enum tomark[] = |
92e4ba7d | 137 | { |
138 | /* written, cold -> hot */ | |
139 | objc_cat_cls_meth_section, | |
140 | objc_cat_inst_meth_section, | |
141 | objc_string_object_section, | |
142 | objc_constant_string_object_section, | |
143 | objc_selector_refs_section, | |
144 | objc_selector_fixup_section, | |
145 | objc_cls_refs_section, | |
146 | objc_class_section, | |
147 | objc_meta_class_section, | |
148 | /* shared, hot -> cold */ | |
149 | objc_cls_meth_section, | |
150 | objc_inst_meth_section, | |
151 | objc_protocol_section, | |
152 | objc_class_names_section, | |
153 | objc_meth_var_types_section, | |
154 | objc_meth_var_names_section, | |
155 | objc_category_section, | |
156 | objc_class_vars_section, | |
157 | objc_instance_vars_section, | |
158 | objc_module_info_section, | |
267785bc | 159 | objc_symbols_section, |
92e4ba7d | 160 | }; |
267785bc | 161 | /* ABI=1 */ |
162 | static const enum darwin_section_enum tomarkv1[] = | |
163 | { | |
164 | objc1_protocol_ext_section, | |
165 | objc1_class_ext_section, | |
166 | objc1_prop_list_section | |
167 | } ; | |
168 | /* ABI=2 */ | |
169 | static const enum darwin_section_enum tomarkv2[] = | |
170 | { | |
171 | objc2_message_refs_section, | |
172 | objc2_classdefs_section, | |
173 | objc2_metadata_section, | |
174 | objc2_classrefs_section, | |
175 | objc2_classlist_section, | |
176 | objc2_categorylist_section, | |
177 | objc2_selector_refs_section, | |
178 | objc2_nonlazy_class_section, | |
179 | objc2_nonlazy_category_section, | |
180 | objc2_protocollist_section, | |
181 | objc2_protocolrefs_section, | |
182 | objc2_super_classrefs_section, | |
183 | objc2_image_info_section, | |
184 | objc2_constant_string_object_section | |
185 | } ; | |
92e4ba7d | 186 | size_t i; |
b215c058 | 187 | |
92e4ba7d | 188 | been_here = true; |
267785bc | 189 | if (flag_objc_abi < 2) |
190 | { | |
191 | for (i = 0; i < ARRAY_SIZE (tomark); i++) | |
192 | switch_to_section (darwin_sections[tomark[i]]); | |
193 | if (flag_objc_abi == 1) | |
194 | for (i = 0; i < ARRAY_SIZE (tomarkv1); i++) | |
195 | switch_to_section (darwin_sections[tomarkv1[i]]); | |
196 | } | |
197 | else | |
198 | for (i = 0; i < ARRAY_SIZE (tomarkv2); i++) | |
199 | switch_to_section (darwin_sections[tomarkv2[i]]); | |
200 | /* Make sure we don't get varasm.c out of sync with us. */ | |
c4796e8b | 201 | switch_to_section (saved_in_section); |
2f14b1f9 | 202 | } |
203 | output_section_asm_op (directive); | |
204 | } | |
205 | ||
61aeb501 | 206 | |
207 | /* Private flag applied to disable section-anchors in a particular section. */ | |
208 | #define SECTION_NO_ANCHOR SECTION_MACH_DEP | |
209 | ||
210 | ||
2f14b1f9 | 211 | /* Implement TARGET_ASM_INIT_SECTIONS. */ |
212 | ||
213 | void | |
214 | darwin_init_sections (void) | |
215 | { | |
92e4ba7d | 216 | #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) \ |
217 | darwin_sections[NAME] = \ | |
218 | get_unnamed_section (FLAGS, (OBJC \ | |
219 | ? output_objc_section_asm_op \ | |
220 | : output_section_asm_op), \ | |
221 | "\t" DIRECTIVE); | |
222 | #include "config/darwin-sections.def" | |
2f14b1f9 | 223 | #undef DEF_SECTION |
224 | ||
92e4ba7d | 225 | readonly_data_section = darwin_sections[const_section]; |
226 | exception_section = darwin_sections[darwin_exception_section]; | |
227 | eh_frame_section = darwin_sections[darwin_eh_frame_section]; | |
f199808c | 228 | |
229 | /* If our linker is new enough to coalesce weak symbols, then we | |
230 | can just put picbase_thunks into the text section. */ | |
231 | if (! ld_uses_coal_sects ) | |
232 | darwin_sections[picbase_thunk_section] = text_section; | |
2f14b1f9 | 233 | } |
f0ed0e8a | 234 | |
80d725d7 | 235 | int |
b40da9a7 | 236 | name_needs_quotes (const char *name) |
80d725d7 | 237 | { |
238 | int c; | |
239 | while ((c = *name++) != '\0') | |
163c9fff | 240 | if (! ISIDNUM (c) |
241 | && c != '.' && c != '$' && c != '_' ) | |
80d725d7 | 242 | return 1; |
243 | return 0; | |
244 | } | |
245 | ||
866318b4 | 246 | /* Return true if SYM_REF can be used without an indirection. */ |
90ff10b3 | 247 | int |
ab06d2ff | 248 | machopic_symbol_defined_p (rtx sym_ref) |
80d725d7 | 249 | { |
866318b4 | 250 | if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_DEFINED) |
251 | return true; | |
252 | ||
253 | /* If a symbol references local and is not an extern to this | |
254 | file, then the symbol might be able to declared as defined. */ | |
255 | if (SYMBOL_REF_LOCAL_P (sym_ref) && ! SYMBOL_REF_EXTERNAL_P (sym_ref)) | |
256 | { | |
257 | /* If the symbol references a variable and the variable is a | |
258 | common symbol, then this symbol is not defined. */ | |
259 | if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_VARIABLE) | |
260 | { | |
261 | tree decl = SYMBOL_REF_DECL (sym_ref); | |
262 | if (!decl) | |
263 | return true; | |
264 | if (DECL_COMMON (decl)) | |
265 | return false; | |
266 | } | |
267 | return true; | |
268 | } | |
269 | return false; | |
80d725d7 | 270 | } |
271 | ||
ab06d2ff | 272 | /* This module assumes that (const (symbol_ref "foo")) is a legal pic |
273 | reference, which will not be changed. */ | |
b40da9a7 | 274 | |
80d725d7 | 275 | enum machopic_addr_class |
ab06d2ff | 276 | machopic_classify_symbol (rtx sym_ref) |
80d725d7 | 277 | { |
ab06d2ff | 278 | bool function_p; |
279 | ||
ab06d2ff | 280 | function_p = SYMBOL_REF_FUNCTION_P (sym_ref); |
281 | if (machopic_symbol_defined_p (sym_ref)) | |
b215c058 | 282 | return (function_p |
ab06d2ff | 283 | ? MACHOPIC_DEFINED_FUNCTION : MACHOPIC_DEFINED_DATA); |
284 | else | |
b215c058 | 285 | return (function_p |
ab06d2ff | 286 | ? MACHOPIC_UNDEFINED_FUNCTION : MACHOPIC_UNDEFINED_DATA); |
80d725d7 | 287 | } |
288 | ||
f0ed0e8a | 289 | #ifndef TARGET_FIX_AND_CONTINUE |
290 | #define TARGET_FIX_AND_CONTINUE 0 | |
291 | #endif | |
292 | ||
293 | /* Indicate when fix-and-continue style code generation is being used | |
294 | and when a reference to data should be indirected so that it can be | |
0975351b | 295 | rebound in a new translation unit to reference the original instance |
f0ed0e8a | 296 | of that data. Symbol names that are for code generation local to |
297 | the translation unit are bound to the new translation unit; | |
298 | currently this means symbols that begin with L or _OBJC_; | |
299 | otherwise, we indicate that an indirect reference should be made to | |
300 | permit the runtime to rebind new instances of the translation unit | |
301 | to the original instance of the data. */ | |
302 | ||
303 | static int | |
304 | indirect_data (rtx sym_ref) | |
305 | { | |
306 | int lprefix; | |
307 | const char *name; | |
308 | ||
c4f8e01f | 309 | /* If we aren't generating fix-and-continue code, don't do anything |
310 | special. */ | |
f0ed0e8a | 311 | if (TARGET_FIX_AND_CONTINUE == 0) |
312 | return 0; | |
313 | ||
314 | /* Otherwise, all symbol except symbols that begin with L or _OBJC_ | |
315 | are indirected. Symbols that begin with L and _OBJC_ are always | |
316 | bound to the current translation unit as they are used for | |
317 | generated local data of the translation unit. */ | |
318 | ||
319 | name = XSTR (sym_ref, 0); | |
320 | ||
321 | lprefix = (((name[0] == '*' || name[0] == '&') | |
322 | && (name[1] == 'L' || (name[1] == '"' && name[2] == 'L'))) | |
78a79402 | 323 | || (strncmp (name, "_OBJC_", 6) == 0)); |
f0ed0e8a | 324 | |
325 | return ! lprefix; | |
326 | } | |
327 | ||
80d725d7 | 328 | static int |
ab06d2ff | 329 | machopic_data_defined_p (rtx sym_ref) |
80d725d7 | 330 | { |
f0ed0e8a | 331 | if (indirect_data (sym_ref)) |
332 | return 0; | |
333 | ||
ab06d2ff | 334 | switch (machopic_classify_symbol (sym_ref)) |
80d725d7 | 335 | { |
336 | case MACHOPIC_DEFINED_DATA: | |
3a7ccce8 | 337 | case MACHOPIC_DEFINED_FUNCTION: |
80d725d7 | 338 | return 1; |
339 | default: | |
340 | return 0; | |
341 | } | |
342 | } | |
343 | ||
80d725d7 | 344 | void |
ab06d2ff | 345 | machopic_define_symbol (rtx mem) |
80d725d7 | 346 | { |
ab06d2ff | 347 | rtx sym_ref; |
b215c058 | 348 | |
27d2baef | 349 | gcc_assert (GET_CODE (mem) == MEM); |
ab06d2ff | 350 | sym_ref = XEXP (mem, 0); |
351 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; | |
80d725d7 | 352 | } |
353 | ||
a914e728 | 354 | /* Return either ORIG or: |
80d725d7 | 355 | |
a914e728 | 356 | (const:P (unspec:P [ORIG] UNSPEC_MACHOPIC_OFFSET)) |
ab06d2ff | 357 | |
a914e728 | 358 | depending on MACHO_DYNAMIC_NO_PIC_P. */ |
ab06d2ff | 359 | rtx |
a914e728 | 360 | machopic_gen_offset (rtx orig) |
ab06d2ff | 361 | { |
a914e728 | 362 | if (MACHO_DYNAMIC_NO_PIC_P) |
b06a3cc3 | 363 | return orig; |
364 | else | |
a914e728 | 365 | { |
366 | /* Play games to avoid marking the function as needing pic if we | |
367 | are being called as part of the cost-estimation process. */ | |
e5d1687d | 368 | if (current_ir_type () != IR_GIMPLE || currently_expanding_to_rtl) |
a914e728 | 369 | crtl->uses_pic_offset_table = 1; |
370 | orig = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, orig), | |
371 | UNSPEC_MACHOPIC_OFFSET); | |
372 | return gen_rtx_CONST (Pmode, orig); | |
373 | } | |
b06a3cc3 | 374 | } |
375 | ||
b186bdc9 | 376 | static GTY(()) const char * function_base_func_name; |
377 | static GTY(()) int current_pic_label_num; | |
f212a7d0 | 378 | static GTY(()) int emitted_pic_label_num; |
b186bdc9 | 379 | |
f212a7d0 | 380 | static void |
381 | update_pic_label_number_if_needed (void) | |
b186bdc9 | 382 | { |
383 | const char *current_name; | |
384 | ||
90ff10b3 | 385 | /* When we are generating _get_pc thunks within stubs, there is no current |
386 | function. */ | |
387 | if (current_function_decl) | |
388 | { | |
389 | current_name = | |
390 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl)); | |
391 | if (function_base_func_name != current_name) | |
392 | { | |
393 | ++current_pic_label_num; | |
394 | function_base_func_name = current_name; | |
395 | } | |
396 | } | |
397 | else | |
80d725d7 | 398 | { |
80d725d7 | 399 | ++current_pic_label_num; |
90ff10b3 | 400 | function_base_func_name = "L_machopic_stub_dummy"; |
80d725d7 | 401 | } |
f212a7d0 | 402 | } |
403 | ||
404 | void | |
405 | machopic_output_function_base_name (FILE *file) | |
406 | { | |
407 | /* If dynamic-no-pic is on, we should not get here. */ | |
408 | gcc_assert (!MACHO_DYNAMIC_NO_PIC_P); | |
409 | ||
410 | update_pic_label_number_if_needed (); | |
411 | fprintf (file, "L%d$pb", current_pic_label_num); | |
412 | } | |
413 | ||
4e2e3c2e | 414 | char curr_picbasename[32]; |
415 | ||
416 | const char * | |
417 | machopic_get_function_picbase (void) | |
418 | { | |
419 | /* If dynamic-no-pic is on, we should not get here. */ | |
420 | gcc_assert (!MACHO_DYNAMIC_NO_PIC_P); | |
421 | ||
422 | update_pic_label_number_if_needed (); | |
423 | snprintf (curr_picbasename, 32, "L%d$pb", current_pic_label_num); | |
424 | return (const char *) curr_picbasename; | |
425 | } | |
426 | ||
f212a7d0 | 427 | bool |
428 | machopic_should_output_picbase_label (void) | |
429 | { | |
430 | update_pic_label_number_if_needed (); | |
431 | ||
432 | if (current_pic_label_num == emitted_pic_label_num) | |
433 | return false; | |
434 | ||
435 | emitted_pic_label_num = current_pic_label_num; | |
436 | return true; | |
80d725d7 | 437 | } |
438 | ||
ab06d2ff | 439 | /* The suffix attached to non-lazy pointer symbols. */ |
440 | #define NON_LAZY_POINTER_SUFFIX "$non_lazy_ptr" | |
441 | /* The suffix attached to stub symbols. */ | |
442 | #define STUB_SUFFIX "$stub" | |
80d725d7 | 443 | |
2ef51f0e | 444 | typedef struct GTY ((for_user)) machopic_indirection |
80d725d7 | 445 | { |
ab06d2ff | 446 | /* The SYMBOL_REF for the entity referenced. */ |
447 | rtx symbol; | |
6d3abfc0 | 448 | /* The name of the stub or non-lazy pointer. */ |
449 | const char * ptr_name; | |
ab06d2ff | 450 | /* True iff this entry is for a stub (as opposed to a non-lazy |
451 | pointer). */ | |
452 | bool stub_p; | |
47ae02b7 | 453 | /* True iff this stub or pointer has been referenced. */ |
ab06d2ff | 454 | bool used; |
455 | } machopic_indirection; | |
456 | ||
b594087e | 457 | struct indirection_hasher : ggc_ptr_hash<machopic_indirection> |
2ef51f0e | 458 | { |
459 | typedef const char *compare_type; | |
460 | static hashval_t hash (machopic_indirection *); | |
461 | static bool equal (machopic_indirection *, const char *); | |
462 | }; | |
463 | ||
ab06d2ff | 464 | /* A table mapping stub names and non-lazy pointer names to |
465 | SYMBOL_REFs for the stubbed-to and pointed-to entities. */ | |
466 | ||
2ef51f0e | 467 | static GTY (()) hash_table<indirection_hasher> *machopic_indirections; |
ab06d2ff | 468 | |
469 | /* Return a hash value for a SLOT in the indirections hash table. */ | |
470 | ||
2ef51f0e | 471 | hashval_t |
472 | indirection_hasher::hash (machopic_indirection *p) | |
ab06d2ff | 473 | { |
6d3abfc0 | 474 | return htab_hash_string (p->ptr_name); |
ab06d2ff | 475 | } |
b40da9a7 | 476 | |
ab06d2ff | 477 | /* Returns true if the KEY is the same as that associated with |
478 | SLOT. */ | |
479 | ||
2ef51f0e | 480 | bool |
481 | indirection_hasher::equal (machopic_indirection *s, const char *k) | |
ab06d2ff | 482 | { |
2ef51f0e | 483 | return strcmp (s->ptr_name, k) == 0; |
ab06d2ff | 484 | } |
80d725d7 | 485 | |
ab06d2ff | 486 | /* Return the name of the non-lazy pointer (if STUB_P is false) or |
4f3ac3c8 | 487 | stub (if STUB_B is true) corresponding to the given name. |
488 | ||
489 | If we have a situation like: | |
490 | ||
491 | global_weak_symbol: | |
492 | .... | |
493 | Lnon_weak_local: | |
494 | .... | |
495 | ||
496 | ld64 will be unable to split this into two atoms (because the "L" makes | |
497 | the second symbol 'invisible'). This means that legitimate direct accesses | |
498 | to the second symbol will appear to be non-allowed direct accesses to an | |
499 | atom of type weak, global which are not allowed. | |
500 | ||
501 | To avoid this, we make the indirections have a leading 'l' (lower-case L) | |
502 | which has a special meaning: linker can see this and use it to determine | |
503 | atoms, but it is not placed into the final symbol table. | |
504 | ||
505 | The implementation here is somewhat heavy-handed in that it will also mark | |
506 | indirections to the __IMPORT,__pointers section the same way which is | |
507 | really unnecessary, since ld64 _can_ split those into atoms as they are | |
508 | fixed size. FIXME: determine if this is a penalty worth extra code to | |
509 | fix. | |
510 | ||
511 | */ | |
8dfaa51b | 512 | |
ab06d2ff | 513 | const char * |
514 | machopic_indirection_name (rtx sym_ref, bool stub_p) | |
515 | { | |
516 | char *buffer; | |
517 | const char *name = XSTR (sym_ref, 0); | |
6d3abfc0 | 518 | size_t namelen = strlen (name); |
ab06d2ff | 519 | machopic_indirection *p; |
524eafbc | 520 | bool needs_quotes; |
521 | const char *suffix; | |
4f3ac3c8 | 522 | char L_or_l = 'L'; |
524eafbc | 523 | const char *prefix = user_label_prefix; |
524 | const char *quote = ""; | |
b359164b | 525 | tree id; |
526 | ||
527 | id = maybe_get_identifier (name); | |
528 | if (id) | |
529 | { | |
530 | tree id_orig = id; | |
531 | ||
532 | while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
533 | id = TREE_CHAIN (id); | |
534 | if (id != id_orig) | |
535 | { | |
536 | name = IDENTIFIER_POINTER (id); | |
537 | namelen = strlen (name); | |
538 | } | |
539 | } | |
b215c058 | 540 | |
524eafbc | 541 | if (name[0] == '*') |
8dfaa51b | 542 | { |
524eafbc | 543 | prefix = ""; |
544 | ++name; | |
545 | --namelen; | |
ab06d2ff | 546 | } |
524eafbc | 547 | |
548 | needs_quotes = name_needs_quotes (name); | |
549 | if (needs_quotes) | |
ab06d2ff | 550 | { |
524eafbc | 551 | quote = "\""; |
8dfaa51b | 552 | } |
553 | ||
524eafbc | 554 | if (stub_p) |
555 | suffix = STUB_SUFFIX; | |
556 | else | |
4f3ac3c8 | 557 | { |
558 | suffix = NON_LAZY_POINTER_SUFFIX; | |
559 | /* Let the linker see this. */ | |
560 | L_or_l = 'l'; | |
561 | } | |
524eafbc | 562 | |
4f3ac3c8 | 563 | buffer = XALLOCAVEC (char, 2 /* strlen ("&L") or ("&l") */ |
524eafbc | 564 | + strlen (prefix) |
565 | + namelen | |
566 | + strlen (suffix) | |
567 | + 2 * strlen (quote) | |
568 | + 1 /* '\0' */); | |
569 | ||
570 | /* Construct the name of the non-lazy pointer or stub. */ | |
4f3ac3c8 | 571 | sprintf (buffer, "&%s%c%s%s%s%s", quote, L_or_l, prefix, name, suffix, quote); |
524eafbc | 572 | |
6d3abfc0 | 573 | if (!machopic_indirections) |
2ef51f0e | 574 | machopic_indirections = hash_table<indirection_hasher>::create_ggc (37); |
b215c058 | 575 | |
2ef51f0e | 576 | machopic_indirection **slot |
577 | = machopic_indirections->find_slot_with_hash (buffer, | |
578 | htab_hash_string (buffer), | |
579 | INSERT); | |
6d3abfc0 | 580 | if (*slot) |
581 | { | |
2ef51f0e | 582 | p = *slot; |
6d3abfc0 | 583 | } |
584 | else | |
ab06d2ff | 585 | { |
25a27413 | 586 | p = ggc_alloc<machopic_indirection> (); |
ab06d2ff | 587 | p->symbol = sym_ref; |
6d3abfc0 | 588 | p->ptr_name = xstrdup (buffer); |
ab06d2ff | 589 | p->stub_p = stub_p; |
6d3abfc0 | 590 | p->used = false; |
591 | *slot = p; | |
ab06d2ff | 592 | } |
b215c058 | 593 | |
6d3abfc0 | 594 | return p->ptr_name; |
80d725d7 | 595 | } |
596 | ||
ab06d2ff | 597 | /* Return the name of the stub for the mcount function. */ |
80d725d7 | 598 | |
ab06d2ff | 599 | const char* |
600 | machopic_mcount_stub_name (void) | |
80d725d7 | 601 | { |
620dd87a | 602 | rtx symbol = gen_rtx_SYMBOL_REF (Pmode, "*mcount"); |
603 | return machopic_indirection_name (symbol, /*stub_p=*/true); | |
80d725d7 | 604 | } |
605 | ||
ab06d2ff | 606 | /* If NAME is the name of a stub or a non-lazy pointer , mark the stub |
607 | or non-lazy pointer as used -- and mark the object to which the | |
608 | pointer/stub refers as used as well, since the pointer/stub will | |
609 | emit a reference to it. */ | |
610 | ||
80d725d7 | 611 | void |
ab06d2ff | 612 | machopic_validate_stub_or_non_lazy_ptr (const char *name) |
80d725d7 | 613 | { |
2ef51f0e | 614 | machopic_indirection *p |
615 | = machopic_indirections->find_with_hash (name, htab_hash_string (name)); | |
6d3abfc0 | 616 | if (p && ! p->used) |
ab06d2ff | 617 | { |
6d3abfc0 | 618 | const char *real_name; |
619 | tree id; | |
b215c058 | 620 | |
6d3abfc0 | 621 | p->used = true; |
622 | ||
09e39ca0 | 623 | /* Do what output_addr_const will do when we actually call it. */ |
624 | if (SYMBOL_REF_DECL (p->symbol)) | |
625 | mark_decl_referenced (SYMBOL_REF_DECL (p->symbol)); | |
626 | ||
627 | real_name = targetm.strip_name_encoding (XSTR (p->symbol, 0)); | |
b215c058 | 628 | |
6d3abfc0 | 629 | id = maybe_get_identifier (real_name); |
630 | if (id) | |
631 | mark_referenced (id); | |
ab06d2ff | 632 | } |
80d725d7 | 633 | } |
634 | ||
635 | /* Transform ORIG, which may be any data source, to the corresponding | |
636 | source using indirections. */ | |
637 | ||
638 | rtx | |
b40da9a7 | 639 | machopic_indirect_data_reference (rtx orig, rtx reg) |
80d725d7 | 640 | { |
641 | rtx ptr_ref = orig; | |
b40da9a7 | 642 | |
80d725d7 | 643 | if (! MACHOPIC_INDIRECT) |
644 | return orig; | |
645 | ||
646 | if (GET_CODE (orig) == SYMBOL_REF) | |
647 | { | |
ab06d2ff | 648 | int defined = machopic_data_defined_p (orig); |
8f74ae7b | 649 | |
650 | if (defined && MACHO_DYNAMIC_NO_PIC_P) | |
651 | { | |
90ff10b3 | 652 | if (DARWIN_PPC) |
653 | { | |
fed0a860 | 654 | /* Create a new register for CSE opportunities. */ |
e1ba4a27 | 655 | rtx hi_reg = (!can_create_pseudo_p () ? reg : gen_reg_rtx (Pmode)); |
fed0a860 | 656 | emit_insn (gen_macho_high (hi_reg, orig)); |
657 | emit_insn (gen_macho_low (reg, hi_reg, orig)); | |
90ff10b3 | 658 | return reg; |
659 | } | |
660 | else if (DARWIN_X86) | |
661 | return orig; | |
662 | else | |
8f74ae7b | 663 | /* some other cpu -- writeme! */ |
27d2baef | 664 | gcc_unreachable (); |
8f74ae7b | 665 | } |
666 | else if (defined) | |
80d725d7 | 667 | { |
90ff10b3 | 668 | rtx offset = NULL; |
669 | if (DARWIN_PPC || HAVE_lo_sum) | |
670 | offset = machopic_gen_offset (orig); | |
80d725d7 | 671 | |
90ff10b3 | 672 | if (DARWIN_PPC) |
673 | { | |
e1ba4a27 | 674 | rtx hi_sum_reg = (!can_create_pseudo_p () |
675 | ? reg | |
676 | : gen_reg_rtx (Pmode)); | |
80d725d7 | 677 | |
27d2baef | 678 | gcc_assert (reg); |
80d725d7 | 679 | |
d1f9b275 | 680 | emit_insn (gen_rtx_SET (hi_sum_reg, |
37ec5024 | 681 | gen_rtx_PLUS (Pmode, pic_offset_table_rtx, |
682 | gen_rtx_HIGH (Pmode, offset)))); | |
d1f9b275 | 683 | emit_insn (gen_rtx_SET (reg, |
3b4a645f | 684 | gen_rtx_LO_SUM (Pmode, hi_sum_reg, |
685 | copy_rtx (offset)))); | |
80d725d7 | 686 | |
687 | orig = reg; | |
90ff10b3 | 688 | } |
689 | else if (HAVE_lo_sum) | |
690 | { | |
27d2baef | 691 | gcc_assert (reg); |
80d725d7 | 692 | |
d1f9b275 | 693 | emit_insn (gen_rtx_SET (reg, gen_rtx_HIGH (Pmode, offset))); |
694 | emit_insn (gen_rtx_SET (reg, gen_rtx_LO_SUM (Pmode, reg, | |
695 | copy_rtx (offset)))); | |
18b42941 | 696 | emit_use (pic_offset_table_rtx); |
80d725d7 | 697 | |
37ec5024 | 698 | orig = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, reg); |
90ff10b3 | 699 | } |
80d725d7 | 700 | return orig; |
701 | } | |
702 | ||
329f67ae | 703 | ptr_ref = (gen_rtx_SYMBOL_REF |
b215c058 | 704 | (Pmode, |
ab06d2ff | 705 | machopic_indirection_name (orig, /*stub_p=*/false))); |
80d725d7 | 706 | |
7c266bb1 | 707 | SYMBOL_REF_DATA (ptr_ref) = SYMBOL_REF_DATA (orig); |
f9226418 | 708 | |
e265a6da | 709 | ptr_ref = gen_const_mem (Pmode, ptr_ref); |
329f67ae | 710 | machopic_define_symbol (ptr_ref); |
80d725d7 | 711 | |
90ff10b3 | 712 | if (DARWIN_X86 |
713 | && reg | |
714 | && MACHO_DYNAMIC_NO_PIC_P) | |
715 | { | |
d1f9b275 | 716 | emit_insn (gen_rtx_SET (reg, ptr_ref)); |
90ff10b3 | 717 | ptr_ref = reg; |
718 | } | |
719 | ||
80d725d7 | 720 | return ptr_ref; |
721 | } | |
722 | else if (GET_CODE (orig) == CONST) | |
723 | { | |
90ff10b3 | 724 | /* If "(const (plus ...", walk the PLUS and return that result. |
725 | PLUS processing (below) will restore the "(const ..." if | |
726 | appropriate. */ | |
80d725d7 | 727 | if (GET_CODE (XEXP (orig, 0)) == PLUS) |
90ff10b3 | 728 | return machopic_indirect_data_reference (XEXP (orig, 0), reg); |
729 | else | |
730 | return orig; | |
731 | } | |
732 | else if (GET_CODE (orig) == MEM) | |
733 | { | |
734 | XEXP (ptr_ref, 0) = | |
735 | machopic_indirect_data_reference (XEXP (orig, 0), reg); | |
736 | return ptr_ref; | |
737 | } | |
738 | else if (GET_CODE (orig) == PLUS) | |
739 | { | |
740 | rtx base, result; | |
741 | /* When the target is i386, this code prevents crashes due to the | |
742 | compiler's ignorance on how to move the PIC base register to | |
743 | other registers. (The reload phase sometimes introduces such | |
744 | insns.) */ | |
745 | if (GET_CODE (XEXP (orig, 0)) == REG | |
746 | && REGNO (XEXP (orig, 0)) == PIC_OFFSET_TABLE_REGNUM | |
747 | /* Prevent the same register from being erroneously used | |
748 | as both the base and index registers. */ | |
749 | && (DARWIN_X86 && (GET_CODE (XEXP (orig, 1)) == CONST)) | |
750 | && reg) | |
80d725d7 | 751 | { |
90ff10b3 | 752 | emit_move_insn (reg, XEXP (orig, 0)); |
753 | XEXP (ptr_ref, 0) = reg; | |
754 | return ptr_ref; | |
80d725d7 | 755 | } |
80d725d7 | 756 | |
90ff10b3 | 757 | /* Legitimize both operands of the PLUS. */ |
758 | base = machopic_indirect_data_reference (XEXP (orig, 0), reg); | |
759 | orig = machopic_indirect_data_reference (XEXP (orig, 1), | |
760 | (base == reg ? 0 : reg)); | |
761 | if (MACHOPIC_INDIRECT && (GET_CODE (orig) == CONST_INT)) | |
29c05e22 | 762 | result = plus_constant (Pmode, base, INTVAL (orig)); |
80d725d7 | 763 | else |
37ec5024 | 764 | result = gen_rtx_PLUS (Pmode, base, orig); |
80d725d7 | 765 | |
80d725d7 | 766 | if (MACHOPIC_JUST_INDIRECT && GET_CODE (base) == MEM) |
767 | { | |
768 | if (reg) | |
769 | { | |
770 | emit_move_insn (reg, result); | |
771 | result = reg; | |
772 | } | |
773 | else | |
774 | { | |
775 | result = force_reg (GET_MODE (result), result); | |
776 | } | |
777 | } | |
778 | ||
779 | return result; | |
80d725d7 | 780 | } |
781 | return ptr_ref; | |
782 | } | |
783 | ||
80d725d7 | 784 | /* Transform TARGET (a MEM), which is a function call target, to the |
785 | corresponding symbol_stub if necessary. Return a new MEM. */ | |
786 | ||
787 | rtx | |
b40da9a7 | 788 | machopic_indirect_call_target (rtx target) |
80d725d7 | 789 | { |
3cf7ab3b | 790 | if (! darwin_emit_branch_islands) |
791 | return target; | |
792 | ||
80d725d7 | 793 | if (GET_CODE (target) != MEM) |
794 | return target; | |
795 | ||
b215c058 | 796 | if (MACHOPIC_INDIRECT |
ab06d2ff | 797 | && GET_CODE (XEXP (target, 0)) == SYMBOL_REF |
798 | && !(SYMBOL_REF_FLAGS (XEXP (target, 0)) | |
799 | & MACHO_SYMBOL_FLAG_DEFINED)) | |
b40da9a7 | 800 | { |
ab06d2ff | 801 | rtx sym_ref = XEXP (target, 0); |
b215c058 | 802 | const char *stub_name = machopic_indirection_name (sym_ref, |
ab06d2ff | 803 | /*stub_p=*/true); |
3754d046 | 804 | machine_mode mode = GET_MODE (sym_ref); |
b215c058 | 805 | |
ab06d2ff | 806 | XEXP (target, 0) = gen_rtx_SYMBOL_REF (mode, stub_name); |
7c266bb1 | 807 | SYMBOL_REF_DATA (XEXP (target, 0)) = SYMBOL_REF_DATA (sym_ref); |
b04fab2a | 808 | MEM_READONLY_P (target) = 1; |
e265a6da | 809 | MEM_NOTRAP_P (target) = 1; |
80d725d7 | 810 | } |
811 | ||
812 | return target; | |
813 | } | |
814 | ||
815 | rtx | |
3754d046 | 816 | machopic_legitimize_pic_address (rtx orig, machine_mode mode, rtx reg) |
80d725d7 | 817 | { |
818 | rtx pic_ref = orig; | |
819 | ||
8f74ae7b | 820 | if (! MACHOPIC_INDIRECT) |
80d725d7 | 821 | return orig; |
822 | ||
823 | /* First handle a simple SYMBOL_REF or LABEL_REF */ | |
824 | if (GET_CODE (orig) == LABEL_REF | |
825 | || (GET_CODE (orig) == SYMBOL_REF | |
826 | )) | |
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 | } | |
1025 | ||
1026 | else if (GET_CODE (orig) == SYMBOL_REF) | |
1027 | return orig; | |
1028 | ||
1029 | else if (GET_CODE (orig) == PLUS | |
1030 | && (GET_CODE (XEXP (orig, 0)) == MEM | |
1031 | || GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
1032 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) | |
1033 | && XEXP (orig, 0) != pic_offset_table_rtx | |
1034 | && GET_CODE (XEXP (orig, 1)) != REG) | |
b40da9a7 | 1035 | |
80d725d7 | 1036 | { |
1037 | rtx base; | |
1038 | int is_complex = (GET_CODE (XEXP (orig, 0)) == MEM); | |
1039 | ||
1040 | base = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
1041 | orig = machopic_legitimize_pic_address (XEXP (orig, 1), | |
1042 | Pmode, (base == reg ? 0 : reg)); | |
1043 | if (GET_CODE (orig) == CONST_INT) | |
1044 | { | |
29c05e22 | 1045 | pic_ref = plus_constant (Pmode, base, INTVAL (orig)); |
80d725d7 | 1046 | is_complex = 1; |
1047 | } | |
1048 | else | |
37ec5024 | 1049 | pic_ref = gen_rtx_PLUS (Pmode, base, orig); |
80d725d7 | 1050 | |
80d725d7 | 1051 | if (reg && is_complex) |
1052 | { | |
1053 | emit_move_insn (reg, pic_ref); | |
1054 | pic_ref = reg; | |
1055 | } | |
1056 | /* Likewise, should we set special REG_NOTEs here? */ | |
1057 | } | |
1058 | ||
1059 | else if (GET_CODE (orig) == CONST) | |
1060 | { | |
1061 | return machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
1062 | } | |
1063 | ||
1064 | else if (GET_CODE (orig) == MEM | |
1065 | && GET_CODE (XEXP (orig, 0)) == SYMBOL_REF) | |
1066 | { | |
1067 | rtx addr = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
b04fab2a | 1068 | addr = replace_equiv_address (orig, addr); |
80d725d7 | 1069 | emit_move_insn (reg, addr); |
1070 | pic_ref = reg; | |
1071 | } | |
1072 | ||
1073 | return pic_ref; | |
1074 | } | |
1075 | ||
ab06d2ff | 1076 | /* Output the stub or non-lazy pointer in *SLOT, if it has been used. |
1077 | DATA is the FILE* for assembly output. Called from | |
1078 | htab_traverse. */ | |
80d725d7 | 1079 | |
2ef51f0e | 1080 | int |
1081 | machopic_output_indirection (machopic_indirection **slot, FILE *asm_out_file) | |
80d725d7 | 1082 | { |
2ef51f0e | 1083 | machopic_indirection *p = *slot; |
ab06d2ff | 1084 | rtx symbol; |
1085 | const char *sym_name; | |
1086 | const char *ptr_name; | |
b215c058 | 1087 | |
ab06d2ff | 1088 | if (!p->used) |
1089 | return 1; | |
80d725d7 | 1090 | |
ab06d2ff | 1091 | symbol = p->symbol; |
1092 | sym_name = XSTR (symbol, 0); | |
6d3abfc0 | 1093 | ptr_name = p->ptr_name; |
b215c058 | 1094 | |
ab06d2ff | 1095 | if (p->stub_p) |
80d725d7 | 1096 | { |
80d725d7 | 1097 | char *sym; |
1098 | char *stub; | |
b359164b | 1099 | tree id; |
1100 | ||
1101 | id = maybe_get_identifier (sym_name); | |
1102 | if (id) | |
1103 | { | |
1104 | tree id_orig = id; | |
1105 | ||
1106 | while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
1107 | id = TREE_CHAIN (id); | |
1108 | if (id != id_orig) | |
1109 | sym_name = IDENTIFIER_POINTER (id); | |
1110 | } | |
80d725d7 | 1111 | |
225ab426 | 1112 | sym = XALLOCAVEC (char, strlen (sym_name) + 2); |
80d725d7 | 1113 | if (sym_name[0] == '*' || sym_name[0] == '&') |
1114 | strcpy (sym, sym_name + 1); | |
1115 | else if (sym_name[0] == '-' || sym_name[0] == '+') | |
b40da9a7 | 1116 | strcpy (sym, sym_name); |
80d725d7 | 1117 | else |
e9764bbb | 1118 | sprintf (sym, "%s%s", user_label_prefix, sym_name); |
80d725d7 | 1119 | |
225ab426 | 1120 | stub = XALLOCAVEC (char, strlen (ptr_name) + 2); |
ab06d2ff | 1121 | if (ptr_name[0] == '*' || ptr_name[0] == '&') |
1122 | strcpy (stub, ptr_name + 1); | |
80d725d7 | 1123 | else |
ab06d2ff | 1124 | sprintf (stub, "%s%s", user_label_prefix, ptr_name); |
80d725d7 | 1125 | |
09e39ca0 | 1126 | machopic_output_stub (asm_out_file, sym, stub); |
80d725d7 | 1127 | } |
f0ed0e8a | 1128 | else if (! indirect_data (symbol) |
8d806159 | 1129 | && (machopic_symbol_defined_p (symbol) |
1130 | || SYMBOL_REF_LOCAL_P (symbol))) | |
80d725d7 | 1131 | { |
2f14b1f9 | 1132 | switch_to_section (data_section); |
ab06d2ff | 1133 | assemble_align (GET_MODE_ALIGNMENT (Pmode)); |
427eb138 | 1134 | assemble_label (asm_out_file, ptr_name); |
ab06d2ff | 1135 | assemble_integer (gen_rtx_SYMBOL_REF (Pmode, sym_name), |
1136 | GET_MODE_SIZE (Pmode), | |
1137 | GET_MODE_ALIGNMENT (Pmode), 1); | |
80d725d7 | 1138 | } |
ab06d2ff | 1139 | else |
1140 | { | |
f0ed0e8a | 1141 | rtx init = const0_rtx; |
1142 | ||
92e4ba7d | 1143 | switch_to_section (darwin_sections[machopic_nl_symbol_ptr_section]); |
cd186228 | 1144 | |
1145 | /* Mach-O symbols are passed around in code through indirect | |
1146 | references and the original symbol_ref hasn't passed through | |
1147 | the generic handling and reference-catching in | |
1148 | output_operand, so we need to manually mark weak references | |
1149 | as such. */ | |
1150 | if (SYMBOL_REF_WEAK (symbol)) | |
1151 | { | |
1152 | tree decl = SYMBOL_REF_DECL (symbol); | |
1153 | gcc_assert (DECL_P (decl)); | |
1154 | ||
1155 | if (decl != NULL_TREE | |
1156 | && DECL_EXTERNAL (decl) && TREE_PUBLIC (decl) | |
1157 | /* Handle only actual external-only definitions, not | |
1158 | e.g. extern inline code or variables for which | |
1159 | storage has been allocated. */ | |
1160 | && !TREE_STATIC (decl)) | |
1161 | { | |
1162 | fputs ("\t.weak_reference ", asm_out_file); | |
1163 | assemble_name (asm_out_file, sym_name); | |
1164 | fputc ('\n', asm_out_file); | |
1165 | } | |
1166 | } | |
1167 | ||
ab06d2ff | 1168 | assemble_name (asm_out_file, ptr_name); |
1169 | fprintf (asm_out_file, ":\n"); | |
b215c058 | 1170 | |
ab06d2ff | 1171 | fprintf (asm_out_file, "\t.indirect_symbol "); |
1172 | assemble_name (asm_out_file, sym_name); | |
1173 | fprintf (asm_out_file, "\n"); | |
b215c058 | 1174 | |
f0ed0e8a | 1175 | /* Variables that are marked with MACHO_SYMBOL_STATIC need to |
1176 | have their symbol name instead of 0 in the second entry of | |
1177 | the non-lazy symbol pointer data structure when they are | |
1178 | defined. This allows the runtime to rebind newer instances | |
1179 | of the translation unit with the original instance of the | |
d188633a | 1180 | symbol. */ |
f0ed0e8a | 1181 | |
1182 | if ((SYMBOL_REF_FLAGS (symbol) & MACHO_SYMBOL_STATIC) | |
1183 | && machopic_symbol_defined_p (symbol)) | |
1184 | init = gen_rtx_SYMBOL_REF (Pmode, sym_name); | |
1185 | ||
1186 | assemble_integer (init, GET_MODE_SIZE (Pmode), | |
ab06d2ff | 1187 | GET_MODE_ALIGNMENT (Pmode), 1); |
1188 | } | |
b215c058 | 1189 | |
ab06d2ff | 1190 | return 1; |
1191 | } | |
1192 | ||
1193 | void | |
1194 | machopic_finish (FILE *asm_out_file) | |
1195 | { | |
1196 | if (machopic_indirections) | |
2ef51f0e | 1197 | machopic_indirections |
1198 | ->traverse_noresize<FILE *, machopic_output_indirection> (asm_out_file); | |
80d725d7 | 1199 | } |
1200 | ||
b40da9a7 | 1201 | int |
1202 | machopic_operand_p (rtx op) | |
80d725d7 | 1203 | { |
1204 | if (MACHOPIC_JUST_INDIRECT) | |
a914e728 | 1205 | return (GET_CODE (op) == SYMBOL_REF |
1206 | && machopic_symbol_defined_p (op)); | |
1207 | else | |
1208 | return (GET_CODE (op) == CONST | |
1209 | && GET_CODE (XEXP (op, 0)) == UNSPEC | |
1210 | && XINT (XEXP (op, 0), 1) == UNSPEC_MACHOPIC_OFFSET); | |
80d725d7 | 1211 | } |
8dfaa51b | 1212 | |
1213 | /* This function records whether a given name corresponds to a defined | |
1214 | or undefined function or variable, for machopic_classify_ident to | |
1215 | use later. */ | |
1216 | ||
1217 | void | |
b40da9a7 | 1218 | darwin_encode_section_info (tree decl, rtx rtl, int first ATTRIBUTE_UNUSED) |
8dfaa51b | 1219 | { |
5a121a91 | 1220 | rtx sym_ref; |
8dfaa51b | 1221 | |
9af9a32c | 1222 | /* Do the standard encoding things first. */ |
1223 | default_encode_section_info (decl, rtl, first); | |
1224 | ||
ab06d2ff | 1225 | if (TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL) |
1226 | return; | |
9af9a32c | 1227 | |
ab06d2ff | 1228 | sym_ref = XEXP (rtl, 0); |
1229 | if (TREE_CODE (decl) == VAR_DECL) | |
1230 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_VARIABLE; | |
1231 | ||
1232 | if (!DECL_EXTERNAL (decl) | |
1dc74225 | 1233 | && (!TREE_PUBLIC (decl) || !DECL_WEAK (decl)) |
0a3ecdc1 | 1234 | && ! lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)) |
8dfaa51b | 1235 | && ((TREE_STATIC (decl) |
1236 | && (!DECL_COMMON (decl) || !TREE_PUBLIC (decl))) | |
2f4fae92 | 1237 | || (!DECL_COMMON (decl) && DECL_INITIAL (decl) |
fd419242 | 1238 | && DECL_INITIAL (decl) != error_mark_node))) |
ab06d2ff | 1239 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; |
f0ed0e8a | 1240 | |
d188633a | 1241 | if (! TREE_PUBLIC (decl)) |
f0ed0e8a | 1242 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_STATIC; |
e479d0de | 1243 | } |
01d15dc5 | 1244 | |
9423c9b7 | 1245 | void |
1246 | darwin_mark_decl_preserved (const char *name) | |
1247 | { | |
565f322f | 1248 | /* Actually we shouldn't mark any local symbol this way, but for now |
1249 | this only happens with ObjC meta-data. */ | |
1250 | if (darwin_label_is_anonymous_local_objc_name (name)) | |
1251 | return; | |
1252 | ||
163c9fff | 1253 | fprintf (asm_out_file, "\t.no_dead_strip "); |
9423c9b7 | 1254 | assemble_name (asm_out_file, name); |
1255 | fputc ('\n', asm_out_file); | |
1256 | } | |
1257 | ||
50e6797e | 1258 | static section * |
f199808c | 1259 | darwin_rodata_section (int use_coal, bool zsize) |
50e6797e | 1260 | { |
f199808c | 1261 | return (use_coal |
50e6797e | 1262 | ? darwin_sections[const_coal_section] |
8e79e9d4 | 1263 | : (zsize ? darwin_sections[zobj_const_section] |
1264 | : darwin_sections[const_section])); | |
50e6797e | 1265 | } |
b40da9a7 | 1266 | |
50e6797e | 1267 | static section * |
1268 | darwin_mergeable_string_section (tree exp, | |
1269 | unsigned HOST_WIDE_INT align) | |
1270 | { | |
1991f4fd | 1271 | /* Darwin's ld expects to see non-writable string literals in the .cstring |
1272 | section. Later versions of ld check and complain when CFStrings are | |
1273 | enabled. Therefore we shall force the strings into .cstring since we | |
1274 | don't support writable ones anyway. */ | |
1275 | if ((darwin_constant_cfstrings || flag_merge_constants) | |
50e6797e | 1276 | && TREE_CODE (exp) == STRING_CST |
1277 | && TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE | |
1278 | && align <= 256 | |
a7df40d7 | 1279 | && (int_size_in_bytes (TREE_TYPE (exp)) |
1280 | == TREE_STRING_LENGTH (exp)) | |
b40da9a7 | 1281 | && ((size_t) TREE_STRING_LENGTH (exp) |
a814bad5 | 1282 | == strlen (TREE_STRING_POINTER (exp)) + 1)) |
92e4ba7d | 1283 | return darwin_sections[cstring_section]; |
50e6797e | 1284 | |
8e79e9d4 | 1285 | if (DARWIN_SECTION_ANCHORS && flag_section_anchors |
1286 | && TREE_CODE (exp) == STRING_CST | |
1287 | && TREE_STRING_LENGTH (exp) == 0) | |
1288 | return darwin_sections[zobj_const_section]; | |
1289 | ||
50e6797e | 1290 | return readonly_data_section; |
1291 | } | |
1292 | ||
4be92808 | 1293 | #ifndef HAVE_GAS_LITERAL16 |
1294 | #define HAVE_GAS_LITERAL16 0 | |
1295 | #endif | |
1296 | ||
50e6797e | 1297 | static section * |
1298 | darwin_mergeable_constant_section (tree exp, | |
8e79e9d4 | 1299 | unsigned HOST_WIDE_INT align, |
1300 | bool zsize) | |
50e6797e | 1301 | { |
3754d046 | 1302 | machine_mode mode = DECL_MODE (exp); |
50e6797e | 1303 | unsigned int modesize = GET_MODE_BITSIZE (mode); |
1304 | ||
8e79e9d4 | 1305 | if (DARWIN_SECTION_ANCHORS |
1306 | && flag_section_anchors | |
1307 | && zsize) | |
1308 | return darwin_sections[zobj_const_section]; | |
1309 | ||
50e6797e | 1310 | if (flag_merge_constants |
1311 | && mode != VOIDmode | |
1312 | && mode != BLKmode | |
1313 | && modesize <= align | |
1314 | && align >= 8 | |
1315 | && align <= 256 | |
1316 | && (align & (align -1)) == 0) | |
52470889 | 1317 | { |
853b103d | 1318 | tree size = TYPE_SIZE_UNIT (TREE_TYPE (exp)); |
52470889 | 1319 | |
e913b5cd | 1320 | if (TREE_CODE (size) == INTEGER_CST) |
1321 | { | |
ab2c1de8 | 1322 | if (wi::eq_p (size, 4)) |
e913b5cd | 1323 | return darwin_sections[literal4_section]; |
ab2c1de8 | 1324 | else if (wi::eq_p (size, 8)) |
e913b5cd | 1325 | return darwin_sections[literal8_section]; |
1326 | else if (HAVE_GAS_LITERAL16 | |
1327 | && TARGET_64BIT | |
ab2c1de8 | 1328 | && wi::eq_p (size, 16)) |
e913b5cd | 1329 | return darwin_sections[literal16_section]; |
1330 | } | |
50e6797e | 1331 | } |
1332 | ||
1333 | return readonly_data_section; | |
1334 | } | |
1335 | ||
e3ef604c | 1336 | section * |
1337 | darwin_tm_clone_table_section (void) | |
1338 | { | |
1339 | return get_named_section (NULL, | |
1340 | "__DATA,__tm_clone_table,regular,no_dead_strip", | |
1341 | 3); | |
1342 | } | |
1343 | ||
0b769e4a | 1344 | int |
1345 | machopic_reloc_rw_mask (void) | |
1346 | { | |
1347 | return MACHOPIC_INDIRECT ? 3 : 0; | |
1348 | } | |
1349 | ||
267785bc | 1350 | /* We have to deal with ObjC/C++ metadata section placement in the common |
1351 | code, since it will also be called from LTO. | |
1352 | ||
1353 | Return metadata attributes, if present (searching for ABI=2 first) | |
1354 | Return NULL_TREE if no such attributes are found. */ | |
1355 | ||
1356 | static tree | |
1357 | is_objc_metadata (tree decl) | |
1358 | { | |
1359 | if (DECL_P (decl) | |
1360 | && (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == CONST_DECL) | |
1361 | && DECL_ATTRIBUTES (decl)) | |
1362 | { | |
1363 | tree meta = lookup_attribute ("OBJC2META", DECL_ATTRIBUTES (decl)); | |
1364 | if (meta) | |
1365 | return meta; | |
1366 | meta = lookup_attribute ("OBJC1META", DECL_ATTRIBUTES (decl)); | |
1367 | if (meta) | |
1368 | return meta; | |
1369 | } | |
1370 | return NULL_TREE; | |
1371 | } | |
1372 | ||
236ce1d1 | 1373 | static int classes_seen; |
1374 | static int objc_metadata_seen; | |
1375 | ||
267785bc | 1376 | /* Return the section required for Objective C ABI 2 metadata. */ |
1377 | static section * | |
1378 | darwin_objc2_section (tree decl ATTRIBUTE_UNUSED, tree meta, section * base) | |
1379 | { | |
1380 | const char *p; | |
1381 | tree ident = TREE_VALUE (meta); | |
1382 | gcc_assert (TREE_CODE (ident) == IDENTIFIER_NODE); | |
1383 | p = IDENTIFIER_POINTER (ident); | |
1384 | ||
236ce1d1 | 1385 | gcc_checking_assert (flag_next_runtime == 1 && flag_objc_abi == 2); |
267785bc | 1386 | |
236ce1d1 | 1387 | objc_metadata_seen = 1; |
267785bc | 1388 | |
1389 | if (base == data_section) | |
1390 | base = darwin_sections[objc2_metadata_section]; | |
1391 | ||
1392 | /* Most of the OBJC2 META-data end up in the base section, so check it | |
1393 | first. */ | |
1394 | if (!strncmp (p, "V2_BASE", 7)) | |
1395 | return base; | |
1396 | else if (!strncmp (p, "V2_STRG", 7)) | |
1397 | return darwin_sections[cstring_section]; | |
1398 | ||
1399 | else if (!strncmp (p, "G2_META", 7) || !strncmp (p, "G2_CLAS", 7)) | |
1400 | return darwin_sections[objc2_classdefs_section]; | |
1401 | else if (!strncmp (p, "V2_MREF", 7)) | |
1402 | return darwin_sections[objc2_message_refs_section]; | |
1403 | else if (!strncmp (p, "V2_CLRF", 7)) | |
1404 | return darwin_sections[objc2_classrefs_section]; | |
1405 | else if (!strncmp (p, "V2_SURF", 7)) | |
1406 | return darwin_sections[objc2_super_classrefs_section]; | |
1407 | else if (!strncmp (p, "V2_NLCL", 7)) | |
1408 | return darwin_sections[objc2_nonlazy_class_section]; | |
1409 | else if (!strncmp (p, "V2_CLAB", 7)) | |
236ce1d1 | 1410 | { |
1411 | classes_seen = 1; | |
1412 | return darwin_sections[objc2_classlist_section]; | |
1413 | } | |
267785bc | 1414 | else if (!strncmp (p, "V2_SRFS", 7)) |
1415 | return darwin_sections[objc2_selector_refs_section]; | |
1416 | else if (!strncmp (p, "V2_NLCA", 7)) | |
1417 | return darwin_sections[objc2_nonlazy_category_section]; | |
1418 | else if (!strncmp (p, "V2_CALA", 7)) | |
1419 | return darwin_sections[objc2_categorylist_section]; | |
1420 | ||
1421 | else if (!strncmp (p, "V2_PLST", 7)) | |
1422 | return darwin_sections[objc2_protocollist_section]; | |
1423 | else if (!strncmp (p, "V2_PRFS", 7)) | |
1424 | return darwin_sections[objc2_protocolrefs_section]; | |
1425 | ||
1426 | else if (!strncmp (p, "V2_INFO", 7)) | |
1427 | return darwin_sections[objc2_image_info_section]; | |
1428 | ||
1429 | else if (!strncmp (p, "V2_EHTY", 7)) | |
f199808c | 1430 | return ld_uses_coal_sects ? darwin_sections[data_coal_section] |
1431 | : data_section; | |
267785bc | 1432 | |
1433 | else if (!strncmp (p, "V2_CSTR", 7)) | |
1434 | return darwin_sections[objc2_constant_string_object_section]; | |
1435 | ||
1436 | /* Not recognized, default. */ | |
1437 | return base; | |
1438 | } | |
1439 | ||
1440 | /* Return the section required for Objective C ABI 0/1 metadata. */ | |
1441 | static section * | |
1442 | darwin_objc1_section (tree decl ATTRIBUTE_UNUSED, tree meta, section * base) | |
1443 | { | |
1444 | const char *p; | |
1445 | tree ident = TREE_VALUE (meta); | |
1446 | gcc_assert (TREE_CODE (ident) == IDENTIFIER_NODE); | |
1447 | p = IDENTIFIER_POINTER (ident); | |
1448 | ||
236ce1d1 | 1449 | gcc_checking_assert (flag_next_runtime == 1 && flag_objc_abi < 2); |
1450 | ||
1451 | objc_metadata_seen = 1; | |
267785bc | 1452 | |
1453 | /* String sections first, cos there are lots of strings. */ | |
1454 | if (!strncmp (p, "V1_STRG", 7)) | |
1455 | return darwin_sections[cstring_section]; | |
1456 | else if (!strncmp (p, "V1_CLSN", 7)) | |
1457 | return darwin_sections[objc_class_names_section]; | |
1458 | else if (!strncmp (p, "V1_METN", 7)) | |
1459 | return darwin_sections[objc_meth_var_names_section]; | |
1460 | else if (!strncmp (p, "V1_METT", 7)) | |
1461 | return darwin_sections[objc_meth_var_types_section]; | |
1462 | ||
1463 | else if (!strncmp (p, "V1_CLAS", 7)) | |
236ce1d1 | 1464 | { |
1465 | classes_seen = 1; | |
1466 | return darwin_sections[objc_class_section]; | |
1467 | } | |
267785bc | 1468 | else if (!strncmp (p, "V1_META", 7)) |
1469 | return darwin_sections[objc_meta_class_section]; | |
1470 | else if (!strncmp (p, "V1_CATG", 7)) | |
1471 | return darwin_sections[objc_category_section]; | |
1472 | else if (!strncmp (p, "V1_PROT", 7)) | |
1473 | return darwin_sections[objc_protocol_section]; | |
1474 | ||
1475 | else if (!strncmp (p, "V1_CLCV", 7)) | |
1476 | return darwin_sections[objc_class_vars_section]; | |
1477 | else if (!strncmp (p, "V1_CLIV", 7)) | |
1478 | return darwin_sections[objc_instance_vars_section]; | |
1479 | ||
1480 | else if (!strncmp (p, "V1_CLCM", 7)) | |
1481 | return darwin_sections[objc_cls_meth_section]; | |
1482 | else if (!strncmp (p, "V1_CLIM", 7)) | |
1483 | return darwin_sections[objc_inst_meth_section]; | |
1484 | else if (!strncmp (p, "V1_CACM", 7)) | |
1485 | return darwin_sections[objc_cat_cls_meth_section]; | |
1486 | else if (!strncmp (p, "V1_CAIM", 7)) | |
1487 | return darwin_sections[objc_cat_inst_meth_section]; | |
1488 | else if (!strncmp (p, "V1_PNSM", 7)) | |
1489 | return darwin_sections[objc_cat_inst_meth_section]; | |
1490 | else if (!strncmp (p, "V1_PCLM", 7)) | |
1491 | return darwin_sections[objc_cat_cls_meth_section]; | |
1492 | ||
1493 | else if (!strncmp (p, "V1_CLPR", 7)) | |
1494 | return darwin_sections[objc_cat_cls_meth_section]; | |
1495 | else if (!strncmp (p, "V1_CAPR", 7)) | |
1496 | return darwin_sections[objc_category_section]; /* ??? CHECK me. */ | |
1497 | ||
1498 | else if (!strncmp (p, "V1_PRFS", 7)) | |
1499 | return darwin_sections[objc_cat_cls_meth_section]; | |
1500 | else if (!strncmp (p, "V1_CLRF", 7)) | |
1501 | return darwin_sections[objc_cls_refs_section]; | |
1502 | else if (!strncmp (p, "V1_SRFS", 7)) | |
1503 | return darwin_sections[objc_selector_refs_section]; | |
1504 | ||
1505 | else if (!strncmp (p, "V1_MODU", 7)) | |
1506 | return darwin_sections[objc_module_info_section]; | |
1507 | else if (!strncmp (p, "V1_SYMT", 7)) | |
1508 | return darwin_sections[objc_symbols_section]; | |
1509 | else if (!strncmp (p, "V1_INFO", 7)) | |
1510 | return darwin_sections[objc_image_info_section]; | |
1511 | ||
1512 | else if (!strncmp (p, "V1_PLST", 7)) | |
1513 | return darwin_sections[objc1_prop_list_section]; | |
1514 | else if (!strncmp (p, "V1_PEXT", 7)) | |
1515 | return darwin_sections[objc1_protocol_ext_section]; | |
1516 | else if (!strncmp (p, "V1_CEXT", 7)) | |
1517 | return darwin_sections[objc1_class_ext_section]; | |
1518 | ||
1519 | else if (!strncmp (p, "V2_CSTR", 7)) | |
1520 | return darwin_sections[objc_constant_string_object_section]; | |
1521 | ||
1522 | return base; | |
1523 | } | |
1524 | ||
50e6797e | 1525 | section * |
1526 | machopic_select_section (tree decl, | |
1527 | int reloc, | |
1528 | unsigned HOST_WIDE_INT align) | |
1529 | { | |
f199808c | 1530 | bool zsize, one, weak, use_coal, ro; |
3b73548b | 1531 | section *base_section = NULL; |
50e6797e | 1532 | |
8e79e9d4 | 1533 | weak = (DECL_P (decl) |
1534 | && DECL_WEAK (decl) | |
1535 | && !lookup_attribute ("weak_import", DECL_ATTRIBUTES (decl))); | |
1536 | ||
f199808c | 1537 | zsize = (DECL_P (decl) |
8e79e9d4 | 1538 | && (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == CONST_DECL) |
e913b5cd | 1539 | && tree_to_uhwi (DECL_SIZE_UNIT (decl)) == 0); |
8e79e9d4 | 1540 | |
f199808c | 1541 | one = DECL_P (decl) |
8e79e9d4 | 1542 | && TREE_CODE (decl) == VAR_DECL |
b395f451 | 1543 | && DECL_COMDAT_GROUP (decl); |
8e79e9d4 | 1544 | |
f199808c | 1545 | use_coal = (weak || one) && ld_uses_coal_sects; |
1546 | ||
8e79e9d4 | 1547 | ro = TREE_READONLY (decl) || TREE_CONSTANT (decl) ; |
1548 | ||
c6134e23 | 1549 | switch (categorize_decl_for_section (decl, reloc)) |
50e6797e | 1550 | { |
1551 | case SECCAT_TEXT: | |
9e09909d | 1552 | gcc_unreachable (); |
50e6797e | 1553 | break; |
1554 | ||
1555 | case SECCAT_RODATA: | |
1556 | case SECCAT_SRODATA: | |
f199808c | 1557 | base_section = darwin_rodata_section (use_coal, zsize); |
50e6797e | 1558 | break; |
1559 | ||
1560 | case SECCAT_RODATA_MERGE_STR: | |
1561 | base_section = darwin_mergeable_string_section (decl, align); | |
1562 | break; | |
1563 | ||
1564 | case SECCAT_RODATA_MERGE_STR_INIT: | |
1565 | base_section = darwin_mergeable_string_section (DECL_INITIAL (decl), align); | |
1566 | break; | |
1567 | ||
1568 | case SECCAT_RODATA_MERGE_CONST: | |
8e79e9d4 | 1569 | base_section = darwin_mergeable_constant_section (decl, align, zsize); |
50e6797e | 1570 | break; |
1571 | ||
1572 | case SECCAT_DATA: | |
1573 | case SECCAT_DATA_REL: | |
1574 | case SECCAT_DATA_REL_LOCAL: | |
1575 | case SECCAT_DATA_REL_RO: | |
1576 | case SECCAT_DATA_REL_RO_LOCAL: | |
1577 | case SECCAT_SDATA: | |
1578 | case SECCAT_TDATA: | |
f199808c | 1579 | if (use_coal) |
8e79e9d4 | 1580 | { |
1581 | if (ro) | |
1582 | base_section = darwin_sections[const_data_coal_section]; | |
1583 | else | |
1584 | base_section = darwin_sections[data_coal_section]; | |
1585 | } | |
1586 | else if (DARWIN_SECTION_ANCHORS | |
1587 | && flag_section_anchors | |
1588 | && zsize) | |
1589 | { | |
1590 | /* If we're doing section anchors, then punt zero-sized objects into | |
1591 | their own sections so that they don't interfere with offset | |
1592 | computation for the remaining vars. This does not need to be done | |
1593 | for stuff in mergeable sections, since these are ineligible for | |
1594 | anchors. */ | |
1595 | if (ro) | |
1596 | base_section = darwin_sections[zobj_const_data_section]; | |
1597 | else | |
1598 | base_section = darwin_sections[zobj_data_section]; | |
1599 | } | |
1600 | else if (ro) | |
1601 | base_section = darwin_sections[const_data_section]; | |
1602 | else | |
1603 | base_section = data_section; | |
1604 | break; | |
50e6797e | 1605 | case SECCAT_BSS: |
1606 | case SECCAT_SBSS: | |
1607 | case SECCAT_TBSS: | |
f199808c | 1608 | if (use_coal) |
8e79e9d4 | 1609 | base_section = darwin_sections[data_coal_section]; |
52470889 | 1610 | else |
8e79e9d4 | 1611 | { |
1612 | if (!TREE_PUBLIC (decl)) | |
1613 | base_section = lcomm_section; | |
1614 | else if (bss_noswitch_section) | |
1615 | base_section = bss_noswitch_section; | |
1616 | else | |
1617 | base_section = data_section; | |
1618 | } | |
50e6797e | 1619 | break; |
1620 | ||
1621 | default: | |
1622 | gcc_unreachable (); | |
52470889 | 1623 | } |
50e6797e | 1624 | |
267785bc | 1625 | /* Darwin weird special cases. |
1626 | a) OBJC Meta-data. */ | |
1627 | if (DECL_P (decl) | |
1628 | && (TREE_CODE (decl) == VAR_DECL | |
1629 | || TREE_CODE (decl) == CONST_DECL) | |
1630 | && DECL_ATTRIBUTES (decl)) | |
1631 | { | |
1632 | tree meta = lookup_attribute ("OBJC2META", DECL_ATTRIBUTES (decl)); | |
1633 | if (meta) | |
1634 | return darwin_objc2_section (decl, meta, base_section); | |
1635 | meta = lookup_attribute ("OBJC1META", DECL_ATTRIBUTES (decl)); | |
1636 | if (meta) | |
1637 | return darwin_objc1_section (decl, meta, base_section); | |
1638 | meta = lookup_attribute ("OBJC1METG", DECL_ATTRIBUTES (decl)); | |
1639 | if (meta) | |
1640 | return base_section; /* GNU runtime is happy with it all in one pot. */ | |
1641 | } | |
1642 | ||
1643 | /* b) Constant string objects. */ | |
50e6797e | 1644 | if (TREE_CODE (decl) == CONSTRUCTOR |
1645 | && TREE_TYPE (decl) | |
1646 | && TREE_CODE (TREE_TYPE (decl)) == RECORD_TYPE | |
1647 | && TYPE_NAME (TREE_TYPE (decl))) | |
52470889 | 1648 | { |
50e6797e | 1649 | tree name = TYPE_NAME (TREE_TYPE (decl)); |
52470889 | 1650 | if (TREE_CODE (name) == TYPE_DECL) |
50e6797e | 1651 | name = DECL_NAME (name); |
0616a948 | 1652 | |
1653 | if (!strcmp (IDENTIFIER_POINTER (name), "__builtin_ObjCString")) | |
267785bc | 1654 | { |
1655 | if (flag_next_runtime) | |
1656 | { | |
1657 | if (flag_objc_abi == 2) | |
1658 | return darwin_sections[objc2_constant_string_object_section]; | |
1659 | else | |
1660 | return darwin_sections[objc_constant_string_object_section]; | |
1661 | } | |
1662 | else | |
1663 | return darwin_sections[objc_string_object_section]; | |
1664 | } | |
d4238e8b | 1665 | else if (!strcmp (IDENTIFIER_POINTER (name), "__builtin_CFString")) |
1666 | return darwin_sections[cfstring_constant_object_section]; | |
52470889 | 1667 | else |
267785bc | 1668 | return base_section; |
52470889 | 1669 | } |
267785bc | 1670 | /* c) legacy meta-data selection. */ |
50e6797e | 1671 | else if (TREE_CODE (decl) == VAR_DECL |
1672 | && DECL_NAME (decl) | |
1673 | && TREE_CODE (DECL_NAME (decl)) == IDENTIFIER_NODE | |
1674 | && IDENTIFIER_POINTER (DECL_NAME (decl)) | |
267785bc | 1675 | && flag_next_runtime |
50e6797e | 1676 | && !strncmp (IDENTIFIER_POINTER (DECL_NAME (decl)), "_OBJC_", 6)) |
52470889 | 1677 | { |
50e6797e | 1678 | const char *name = IDENTIFIER_POINTER (DECL_NAME (decl)); |
267785bc | 1679 | static bool warned_objc_46 = false; |
8e79e9d4 | 1680 | /* We shall assert that zero-sized objects are an error in ObjC |
1681 | meta-data. */ | |
e913b5cd | 1682 | gcc_assert (tree_to_uhwi (DECL_SIZE_UNIT (decl)) != 0); |
267785bc | 1683 | |
1684 | /* ??? This mechanism for determining the metadata section is | |
1685 | broken when LTO is in use, since the frontend that generated | |
1686 | the data is not identified. We will keep the capability for | |
1687 | the short term - in case any non-Objective-C programs are using | |
1688 | it to place data in specified sections. */ | |
1689 | if (!warned_objc_46) | |
1690 | { | |
1691 | location_t loc = DECL_SOURCE_LOCATION (decl); | |
1692 | warning_at (loc, 0, "the use of _OBJC_-prefixed variable names" | |
1693 | " to select meta-data sections is deprecated at 4.6" | |
1694 | " and will be removed in 4.7"); | |
1695 | warned_objc_46 = true; | |
1696 | } | |
1697 | ||
52470889 | 1698 | if (!strncmp (name, "_OBJC_CLASS_METHODS_", 20)) |
50e6797e | 1699 | return darwin_sections[objc_cls_meth_section]; |
52470889 | 1700 | else if (!strncmp (name, "_OBJC_INSTANCE_METHODS_", 23)) |
50e6797e | 1701 | return darwin_sections[objc_inst_meth_section]; |
8e79e9d4 | 1702 | else if (!strncmp (name, "_OBJC_CATEGORY_CLASS_METHODS_", 29)) |
50e6797e | 1703 | return darwin_sections[objc_cat_cls_meth_section]; |
8e79e9d4 | 1704 | else if (!strncmp (name, "_OBJC_CATEGORY_INSTANCE_METHODS_", 32)) |
50e6797e | 1705 | return darwin_sections[objc_cat_inst_meth_section]; |
52470889 | 1706 | else if (!strncmp (name, "_OBJC_CLASS_VARIABLES_", 22)) |
50e6797e | 1707 | return darwin_sections[objc_class_vars_section]; |
52470889 | 1708 | else if (!strncmp (name, "_OBJC_INSTANCE_VARIABLES_", 25)) |
50e6797e | 1709 | return darwin_sections[objc_instance_vars_section]; |
52470889 | 1710 | else if (!strncmp (name, "_OBJC_CLASS_PROTOCOLS_", 22)) |
50e6797e | 1711 | return darwin_sections[objc_cat_cls_meth_section]; |
52470889 | 1712 | else if (!strncmp (name, "_OBJC_CLASS_NAME_", 17)) |
50e6797e | 1713 | return darwin_sections[objc_class_names_section]; |
52470889 | 1714 | else if (!strncmp (name, "_OBJC_METH_VAR_NAME_", 20)) |
50e6797e | 1715 | return darwin_sections[objc_meth_var_names_section]; |
52470889 | 1716 | else if (!strncmp (name, "_OBJC_METH_VAR_TYPE_", 20)) |
50e6797e | 1717 | return darwin_sections[objc_meth_var_types_section]; |
52470889 | 1718 | else if (!strncmp (name, "_OBJC_CLASS_REFERENCES", 22)) |
50e6797e | 1719 | return darwin_sections[objc_cls_refs_section]; |
52470889 | 1720 | else if (!strncmp (name, "_OBJC_CLASS_", 12)) |
50e6797e | 1721 | return darwin_sections[objc_class_section]; |
52470889 | 1722 | else if (!strncmp (name, "_OBJC_METACLASS_", 16)) |
50e6797e | 1723 | return darwin_sections[objc_meta_class_section]; |
52470889 | 1724 | else if (!strncmp (name, "_OBJC_CATEGORY_", 15)) |
50e6797e | 1725 | return darwin_sections[objc_category_section]; |
52470889 | 1726 | else if (!strncmp (name, "_OBJC_SELECTOR_REFERENCES", 25)) |
50e6797e | 1727 | return darwin_sections[objc_selector_refs_section]; |
52470889 | 1728 | else if (!strncmp (name, "_OBJC_SELECTOR_FIXUP", 20)) |
50e6797e | 1729 | return darwin_sections[objc_selector_fixup_section]; |
52470889 | 1730 | else if (!strncmp (name, "_OBJC_SYMBOLS", 13)) |
50e6797e | 1731 | return darwin_sections[objc_symbols_section]; |
52470889 | 1732 | else if (!strncmp (name, "_OBJC_MODULES", 13)) |
50e6797e | 1733 | return darwin_sections[objc_module_info_section]; |
c17b85ea | 1734 | else if (!strncmp (name, "_OBJC_IMAGE_INFO", 16)) |
50e6797e | 1735 | return darwin_sections[objc_image_info_section]; |
52470889 | 1736 | else if (!strncmp (name, "_OBJC_PROTOCOL_INSTANCE_METHODS_", 32)) |
50e6797e | 1737 | return darwin_sections[objc_cat_inst_meth_section]; |
52470889 | 1738 | else if (!strncmp (name, "_OBJC_PROTOCOL_CLASS_METHODS_", 29)) |
50e6797e | 1739 | return darwin_sections[objc_cat_cls_meth_section]; |
52470889 | 1740 | else if (!strncmp (name, "_OBJC_PROTOCOL_REFS_", 20)) |
50e6797e | 1741 | return darwin_sections[objc_cat_cls_meth_section]; |
52470889 | 1742 | else if (!strncmp (name, "_OBJC_PROTOCOL_", 15)) |
50e6797e | 1743 | return darwin_sections[objc_protocol_section]; |
52470889 | 1744 | else |
50e6797e | 1745 | return base_section; |
52470889 | 1746 | } |
50e6797e | 1747 | |
1748 | return base_section; | |
52470889 | 1749 | } |
1750 | ||
bbfbe351 | 1751 | /* This can be called with address expressions as "rtx". |
9cb8e99f | 1752 | They must go in "const". */ |
bbfbe351 | 1753 | |
2f14b1f9 | 1754 | section * |
3754d046 | 1755 | machopic_select_rtx_section (machine_mode mode, rtx x, |
b40da9a7 | 1756 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) |
bbfbe351 | 1757 | { |
f2e8796e | 1758 | if (GET_MODE_SIZE (mode) == 8 |
1759 | && (GET_CODE (x) == CONST_INT | |
219f3246 | 1760 | || GET_CODE (x) == CONST_WIDE_INT |
f2e8796e | 1761 | || GET_CODE (x) == CONST_DOUBLE)) |
92e4ba7d | 1762 | return darwin_sections[literal8_section]; |
bbfbe351 | 1763 | else if (GET_MODE_SIZE (mode) == 4 |
1764 | && (GET_CODE (x) == CONST_INT | |
219f3246 | 1765 | || GET_CODE (x) == CONST_WIDE_INT |
bbfbe351 | 1766 | || GET_CODE (x) == CONST_DOUBLE)) |
92e4ba7d | 1767 | return darwin_sections[literal4_section]; |
4be92808 | 1768 | else if (HAVE_GAS_LITERAL16 |
1769 | && TARGET_64BIT | |
7463cbdf | 1770 | && GET_MODE_SIZE (mode) == 16 |
3ebc7dec | 1771 | && (GET_CODE (x) == CONST_INT |
219f3246 | 1772 | || GET_CODE (x) == CONST_WIDE_INT |
2805e80b | 1773 | || GET_CODE (x) == CONST_DOUBLE |
1774 | || GET_CODE (x) == CONST_VECTOR)) | |
3ebc7dec | 1775 | return darwin_sections[literal16_section]; |
459f8624 | 1776 | else if (MACHOPIC_INDIRECT |
76dece62 | 1777 | && (GET_CODE (x) == SYMBOL_REF |
1778 | || GET_CODE (x) == CONST | |
1779 | || GET_CODE (x) == LABEL_REF)) | |
92e4ba7d | 1780 | return darwin_sections[const_data_section]; |
bbfbe351 | 1781 | else |
92e4ba7d | 1782 | return darwin_sections[const_section]; |
bbfbe351 | 1783 | } |
1784 | ||
01d15dc5 | 1785 | void |
b40da9a7 | 1786 | machopic_asm_out_constructor (rtx symbol, int priority ATTRIBUTE_UNUSED) |
01d15dc5 | 1787 | { |
ed161dab | 1788 | cdtor_record new_elt = {symbol, priority, vec_safe_length (ctors)}; |
4b313269 | 1789 | |
1790 | vec_safe_push (ctors, new_elt); | |
1791 | ||
1792 | if (! MACHOPIC_INDIRECT) | |
1793 | fprintf (asm_out_file, ".reference .constructors_used\n"); | |
1794 | } | |
1795 | ||
ed161dab | 1796 | void |
1797 | machopic_asm_out_destructor (rtx symbol, int priority ATTRIBUTE_UNUSED) | |
1798 | { | |
1799 | cdtor_record new_elt = {symbol, priority, vec_safe_length (dtors)}; | |
1800 | ||
1801 | vec_safe_push (dtors, new_elt); | |
1802 | ||
1803 | if (! MACHOPIC_INDIRECT) | |
1804 | fprintf (asm_out_file, ".reference .destructors_used\n"); | |
1805 | } | |
1806 | ||
4b313269 | 1807 | static int |
ed161dab | 1808 | sort_cdtor_records (const void * a, const void * b) |
4b313269 | 1809 | { |
ed161dab | 1810 | const cdtor_record *cda = (const cdtor_record *)a; |
1811 | const cdtor_record *cdb = (const cdtor_record *)b; | |
1812 | if (cda->priority > cdb->priority) | |
4b313269 | 1813 | return 1; |
ed161dab | 1814 | if (cda->priority < cdb->priority) |
4b313269 | 1815 | return -1; |
ed161dab | 1816 | if (cda->position > cdb->position) |
4b313269 | 1817 | return 1; |
ed161dab | 1818 | if (cda->position < cdb->position) |
4b313269 | 1819 | return -1; |
1820 | return 0; | |
1821 | } | |
1822 | ||
1823 | static void | |
ed161dab | 1824 | finalize_ctors () |
4b313269 | 1825 | { |
1826 | unsigned int i; | |
ed161dab | 1827 | cdtor_record *elt; |
4b313269 | 1828 | |
8f74ae7b | 1829 | if (MACHOPIC_INDIRECT) |
92e4ba7d | 1830 | switch_to_section (darwin_sections[mod_init_section]); |
01d15dc5 | 1831 | else |
92e4ba7d | 1832 | switch_to_section (darwin_sections[constructor_section]); |
01d15dc5 | 1833 | |
4b313269 | 1834 | if (vec_safe_length (ctors) > 1) |
ed161dab | 1835 | ctors->qsort (sort_cdtor_records); |
4b313269 | 1836 | FOR_EACH_VEC_SAFE_ELT (ctors, i, elt) |
1837 | { | |
1838 | assemble_align (POINTER_SIZE); | |
1839 | assemble_integer (elt->symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
1840 | } | |
01d15dc5 | 1841 | } |
1842 | ||
ed161dab | 1843 | static void |
1844 | finalize_dtors () | |
01d15dc5 | 1845 | { |
ed161dab | 1846 | unsigned int i; |
1847 | cdtor_record *elt; | |
1848 | ||
8f74ae7b | 1849 | if (MACHOPIC_INDIRECT) |
92e4ba7d | 1850 | switch_to_section (darwin_sections[mod_term_section]); |
01d15dc5 | 1851 | else |
92e4ba7d | 1852 | switch_to_section (darwin_sections[destructor_section]); |
01d15dc5 | 1853 | |
ed161dab | 1854 | if (vec_safe_length (dtors) > 1) |
1855 | dtors->qsort (sort_cdtor_records); | |
1856 | FOR_EACH_VEC_SAFE_ELT (dtors, i, elt) | |
1857 | { | |
1858 | assemble_align (POINTER_SIZE); | |
1859 | assemble_integer (elt->symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
1860 | } | |
01d15dc5 | 1861 | } |
1f3233d1 | 1862 | |
67c1e638 | 1863 | void |
b40da9a7 | 1864 | darwin_globalize_label (FILE *stream, const char *name) |
67c1e638 | 1865 | { |
1866 | if (!!strncmp (name, "_OBJC_", 6)) | |
1867 | default_globalize_label (stream, name); | |
1868 | } | |
1869 | ||
32e31f06 | 1870 | /* This routine returns non-zero if 'name' starts with the special objective-c |
1871 | anonymous file-scope static name. It accommodates c++'s mangling of such | |
1872 | symbols (in this case the symbols will have form _ZL{d}*_OBJC_* d=digit). */ | |
1873 | ||
1874 | int | |
1875 | darwin_label_is_anonymous_local_objc_name (const char *name) | |
1876 | { | |
1877 | const unsigned char *p = (const unsigned char *) name; | |
1878 | if (*p != '_') | |
1879 | return 0; | |
1880 | if (p[1] == 'Z' && p[2] == 'L') | |
1881 | { | |
1882 | p += 3; | |
1883 | while (*p >= '0' && *p <= '9') | |
1884 | p++; | |
1885 | } | |
1886 | return (!strncmp ((const char *)p, "_OBJC_", 6)); | |
1887 | } | |
1888 | ||
13e2f0a0 | 1889 | /* LTO support for Mach-O. |
23433d72 | 1890 | |
13e2f0a0 | 1891 | This version uses three mach-o sections to encapsulate the (unlimited |
1892 | number of) lto sections. | |
23433d72 | 1893 | |
13e2f0a0 | 1894 | __GNU_LTO, __lto_sections contains the concatented GNU LTO section data. |
1895 | __GNU_LTO, __section_names contains the GNU LTO section names. | |
1896 | __GNU_LTO, __section_index contains an array of values that index these. | |
23433d72 | 1897 | |
13e2f0a0 | 1898 | Indexed thus: |
1899 | <section offset from the start of __GNU_LTO, __lto_sections>, | |
1900 | <section length> | |
1901 | <name offset from the start of __GNU_LTO, __section_names, | |
1902 | <name length>. | |
1903 | ||
1904 | At present, for both m32 and m64 mach-o files each of these fields is | |
1905 | represented by a uint32_t. This is because, AFAICT, a mach-o object | |
1906 | cannot exceed 4Gb because the section_64 offset field (see below) is 32bits. | |
1907 | ||
1908 | uint32_t offset; | |
1909 | "offset An integer specifying the offset to this section in the file." */ | |
1910 | ||
1911 | /* Count lto section numbers. */ | |
1912 | static unsigned int lto_section_num = 0; | |
1913 | ||
1914 | /* A vector of information about LTO sections, at present, we only have | |
1915 | the name. TODO: see if we can get the data length somehow. */ | |
1916 | typedef struct GTY (()) darwin_lto_section_e { | |
1917 | const char *sectname; | |
1918 | } darwin_lto_section_e ; | |
13e2f0a0 | 1919 | |
f1f41a6c | 1920 | static GTY (()) vec<darwin_lto_section_e, va_gc> *lto_section_names; |
13e2f0a0 | 1921 | |
13e2f0a0 | 1922 | /* Section wrapper scheme (used here to wrap the unlimited number of LTO |
1923 | sections into three Mach-O ones). | |
1924 | NOTE: These names MUST be kept in sync with those in | |
1925 | libiberty/simple-object-mach-o. */ | |
1926 | #define LTO_SECTS_SECTION "__wrapper_sects" | |
1927 | #define LTO_NAMES_SECTION "__wrapper_names" | |
1928 | #define LTO_INDEX_SECTION "__wrapper_index" | |
23433d72 | 1929 | |
1930 | /* File to temporarily store LTO data. This is appended to asm_out_file | |
1931 | in darwin_end_file. */ | |
1932 | static FILE *lto_asm_out_file, *saved_asm_out_file; | |
1933 | static char *lto_asm_out_name; | |
1934 | ||
1935 | /* Prepare asm_out_file for LTO output. For darwin, this means hiding | |
1936 | asm_out_file and switching to an alternative output file. */ | |
1937 | void | |
1938 | darwin_asm_lto_start (void) | |
1939 | { | |
1940 | gcc_assert (! saved_asm_out_file); | |
1941 | saved_asm_out_file = asm_out_file; | |
1942 | if (! lto_asm_out_name) | |
1943 | lto_asm_out_name = make_temp_file (".lto.s"); | |
1944 | lto_asm_out_file = fopen (lto_asm_out_name, "a"); | |
1945 | if (lto_asm_out_file == NULL) | |
c05be867 | 1946 | fatal_error (input_location, |
1947 | "failed to open temporary file %s for LTO output", | |
23433d72 | 1948 | lto_asm_out_name); |
1949 | asm_out_file = lto_asm_out_file; | |
1950 | } | |
1951 | ||
1952 | /* Restore asm_out_file. */ | |
1953 | void | |
1954 | darwin_asm_lto_end (void) | |
1955 | { | |
1956 | gcc_assert (saved_asm_out_file); | |
1957 | fclose (lto_asm_out_file); | |
1958 | asm_out_file = saved_asm_out_file; | |
1959 | saved_asm_out_file = NULL; | |
1960 | } | |
1961 | ||
edea89b9 | 1962 | static void |
1963 | darwin_asm_dwarf_section (const char *name, unsigned int flags, tree decl); | |
1964 | ||
1965 | /* Called for the TARGET_ASM_NAMED_SECTION hook. */ | |
1966 | ||
2f9fc8ef | 1967 | void |
b215c058 | 1968 | darwin_asm_named_section (const char *name, |
23433d72 | 1969 | unsigned int flags, |
537cd941 | 1970 | tree decl ATTRIBUTE_UNUSED) |
2f9fc8ef | 1971 | { |
13e2f0a0 | 1972 | /* LTO sections go in a special section that encapsulates the (unlimited) |
1973 | number of GNU LTO sections within a single mach-o one. */ | |
23433d72 | 1974 | if (strncmp (name, LTO_SECTION_NAME_PREFIX, |
1975 | strlen (LTO_SECTION_NAME_PREFIX)) == 0) | |
1976 | { | |
13e2f0a0 | 1977 | darwin_lto_section_e e; |
23433d72 | 1978 | /* We expect certain flags to be set... */ |
1979 | gcc_assert ((flags & (SECTION_DEBUG | SECTION_NAMED)) | |
1980 | == (SECTION_DEBUG | SECTION_NAMED)); | |
1981 | ||
13e2f0a0 | 1982 | /* Switch to our combined section. */ |
1983 | fprintf (asm_out_file, "\t.section %s,%s,regular,debug\n", | |
1984 | LTO_SEGMENT_NAME, LTO_SECTS_SECTION); | |
1985 | /* Output a label for the start of this sub-section. */ | |
1986 | fprintf (asm_out_file, "L_GNU_LTO%d:\t;# %s\n", | |
1987 | lto_section_num, name); | |
1988 | /* We have to jump through hoops to get the values of the intra-section | |
1989 | offsets... */ | |
1990 | fprintf (asm_out_file, "\t.set L$gnu$lto$offs%d,L_GNU_LTO%d-L_GNU_LTO0\n", | |
1991 | lto_section_num, lto_section_num); | |
1992 | fprintf (asm_out_file, | |
1993 | "\t.set L$gnu$lto$size%d,L_GNU_LTO%d-L_GNU_LTO%d\n", | |
1994 | lto_section_num, lto_section_num+1, lto_section_num); | |
1995 | lto_section_num++; | |
1996 | e.sectname = xstrdup (name); | |
1997 | /* Keep the names, we'll need to make a table later. | |
1998 | TODO: check that we do not revisit sections, that would break | |
1999 | the assumption of how this is done. */ | |
2000 | if (lto_section_names == NULL) | |
f1f41a6c | 2001 | vec_alloc (lto_section_names, 16); |
2002 | vec_safe_push (lto_section_names, e); | |
13e2f0a0 | 2003 | } |
edea89b9 | 2004 | else if (strncmp (name, "__DWARF,", 8) == 0) |
2005 | darwin_asm_dwarf_section (name, flags, decl); | |
23433d72 | 2006 | else |
2007 | fprintf (asm_out_file, "\t.section %s\n", name); | |
2f9fc8ef | 2008 | } |
2009 | ||
b215c058 | 2010 | void |
1dc74225 | 2011 | darwin_unique_section (tree decl ATTRIBUTE_UNUSED, int reloc ATTRIBUTE_UNUSED) |
2f9fc8ef | 2012 | { |
1dc74225 | 2013 | /* Darwin does not use unique sections. */ |
2f9fc8ef | 2014 | } |
2015 | ||
5b182752 | 2016 | /* Handle __attribute__ ((apple_kext_compatibility)). |
2017 | This only applies to darwin kexts for 2.95 compatibility -- it shrinks the | |
2018 | vtable for classes with this attribute (and their descendants) by not | |
2019 | outputting the new 3.0 nondeleting destructor. This means that such | |
2020 | objects CANNOT be allocated on the stack or as globals UNLESS they have | |
2021 | a completely empty `operator delete'. | |
2022 | Luckily, this fits in with the Darwin kext model. | |
2023 | ||
2024 | This attribute also disables gcc3's potential overlaying of derived | |
2025 | class data members on the padding at the end of the base class. */ | |
2026 | ||
2027 | tree | |
2028 | darwin_handle_kext_attribute (tree *node, tree name, | |
2029 | tree args ATTRIBUTE_UNUSED, | |
2030 | int flags ATTRIBUTE_UNUSED, | |
2031 | bool *no_add_attrs) | |
2032 | { | |
2033 | /* APPLE KEXT stuff -- only applies with pure static C++ code. */ | |
2034 | if (! TARGET_KEXTABI) | |
2035 | { | |
67a779df | 2036 | warning (0, "%qE 2.95 vtable-compatibility attribute applies " |
2037 | "only when compiling a kext", name); | |
5b182752 | 2038 | |
2039 | *no_add_attrs = true; | |
2040 | } | |
2041 | else if (TREE_CODE (*node) != RECORD_TYPE) | |
2042 | { | |
67a779df | 2043 | warning (0, "%qE 2.95 vtable-compatibility attribute applies " |
2044 | "only to C++ classes", name); | |
5b182752 | 2045 | |
2046 | *no_add_attrs = true; | |
2047 | } | |
2048 | ||
2049 | return NULL_TREE; | |
2050 | } | |
2051 | ||
975d636c | 2052 | /* Handle a "weak_import" attribute; arguments as in |
2053 | struct attribute_spec.handler. */ | |
2054 | ||
2055 | tree | |
2056 | darwin_handle_weak_import_attribute (tree *node, tree name, | |
2057 | tree ARG_UNUSED (args), | |
2058 | int ARG_UNUSED (flags), | |
2059 | bool * no_add_attrs) | |
2060 | { | |
d0ddd548 | 2061 | if (TREE_CODE (*node) != FUNCTION_DECL && TREE_CODE (*node) != VAR_DECL) |
975d636c | 2062 | { |
67a779df | 2063 | warning (OPT_Wattributes, "%qE attribute ignored", |
2064 | name); | |
975d636c | 2065 | *no_add_attrs = true; |
2066 | } | |
2067 | else | |
2068 | declare_weak (*node); | |
2069 | ||
2070 | return NULL_TREE; | |
2071 | } | |
a3952a36 | 2072 | |
b215c058 | 2073 | /* Emit a label for an FDE, making it global and/or weak if appropriate. |
ef1074f7 | 2074 | The third parameter is nonzero if this is for exception handling. |
2075 | The fourth parameter is nonzero if this is just a placeholder for an | |
2f9fc8ef | 2076 | FDE that we are omitting. */ |
ef1074f7 | 2077 | |
b215c058 | 2078 | void |
ef1074f7 | 2079 | darwin_emit_unwind_label (FILE *file, tree decl, int for_eh, int empty) |
2f9fc8ef | 2080 | { |
9e09909d | 2081 | char *lab ; |
2082 | char buf[32]; | |
2083 | static int invok_count = 0; | |
2084 | static tree last_fun_decl = NULL_TREE; | |
2085 | ||
2086 | /* We use the linker to emit the .eh labels for Darwin 9 and above. */ | |
2087 | if (! for_eh || generating_for_darwin_version >= 9) | |
d08d29c0 | 2088 | return; |
2f9fc8ef | 2089 | |
9e09909d | 2090 | /* FIXME: This only works when the eh for all sections of a function is |
2091 | emitted at the same time. If that changes, we would need to use a lookup | |
2092 | table of some form to determine what to do. Also, we should emit the | |
2093 | unadorned label for the partition containing the public label for a | |
2094 | function. This is of limited use, probably, since we do not currently | |
2095 | enable partitioning. */ | |
2096 | strcpy (buf, ".eh"); | |
2097 | if (decl && TREE_CODE (decl) == FUNCTION_DECL) | |
2098 | { | |
2099 | if (decl == last_fun_decl) | |
2100 | { | |
2101 | invok_count++; | |
2102 | snprintf (buf, 31, "$$part$$%d.eh", invok_count); | |
2103 | } | |
2104 | else | |
2105 | { | |
2106 | last_fun_decl = decl; | |
2107 | invok_count = 0; | |
2108 | } | |
2109 | } | |
2110 | ||
2111 | lab = concat (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)), buf, NULL); | |
2f9fc8ef | 2112 | |
2113 | if (TREE_PUBLIC (decl)) | |
e8f535c2 | 2114 | { |
2115 | targetm.asm_out.globalize_label (file, lab); | |
2116 | if (DECL_VISIBILITY (decl) == VISIBILITY_HIDDEN) | |
2117 | { | |
2118 | fputs ("\t.private_extern ", file); | |
2119 | assemble_name (file, lab); | |
2120 | fputc ('\n', file); | |
2121 | } | |
2122 | } | |
2f9fc8ef | 2123 | |
1dc74225 | 2124 | if (DECL_WEAK (decl)) |
e8f535c2 | 2125 | { |
2126 | fputs ("\t.weak_definition ", file); | |
2127 | assemble_name (file, lab); | |
2128 | fputc ('\n', file); | |
2129 | } | |
2f9fc8ef | 2130 | |
e8f535c2 | 2131 | assemble_name (file, lab); |
2f9fc8ef | 2132 | if (empty) |
a3952a36 | 2133 | { |
e8f535c2 | 2134 | fputs (" = 0\n", file); |
a3952a36 | 2135 | |
2136 | /* Mark the absolute .eh and .eh1 style labels as needed to | |
2137 | ensure that we don't dead code strip them and keep such | |
2138 | labels from another instantiation point until we can fix this | |
2139 | properly with group comdat support. */ | |
e8f535c2 | 2140 | darwin_mark_decl_preserved (lab); |
a3952a36 | 2141 | } |
2f9fc8ef | 2142 | else |
e8f535c2 | 2143 | fputs (":\n", file); |
2f9fc8ef | 2144 | |
2145 | free (lab); | |
2146 | } | |
2147 | ||
b215c058 | 2148 | static GTY(()) unsigned long except_table_label_num; |
2149 | ||
2150 | void | |
2151 | darwin_emit_except_table_label (FILE *file) | |
2152 | { | |
2153 | char section_start_label[30]; | |
2154 | ||
2155 | ASM_GENERATE_INTERNAL_LABEL (section_start_label, "GCC_except_table", | |
2156 | except_table_label_num++); | |
2157 | ASM_OUTPUT_LABEL (file, section_start_label); | |
2158 | } | |
2159 | /* Generate a PC-relative reference to a Mach-O non-lazy-symbol. */ | |
ef1074f7 | 2160 | |
2f9fc8ef | 2161 | void |
2162 | darwin_non_lazy_pcrel (FILE *file, rtx addr) | |
2163 | { | |
2f9fc8ef | 2164 | const char *nlp_name; |
2165 | ||
27d2baef | 2166 | gcc_assert (GET_CODE (addr) == SYMBOL_REF); |
2f9fc8ef | 2167 | |
ab06d2ff | 2168 | nlp_name = machopic_indirection_name (addr, /*stub_p=*/false); |
2f9fc8ef | 2169 | fputs ("\t.long\t", file); |
2170 | ASM_OUTPUT_LABELREF (file, nlp_name); | |
2171 | fputs ("-.", file); | |
2172 | } | |
2173 | ||
8e79e9d4 | 2174 | /* If this is uncommented, details of each allocation will be printed |
2175 | in the asm right before the actual code. WARNING - this will cause some | |
2176 | test-suite fails (since the printout will contain items that some tests | |
2177 | are not expecting) -- so don't leave it on by default (it bloats the | |
2178 | asm too). */ | |
2179 | /*#define DEBUG_DARWIN_MEM_ALLOCATORS*/ | |
2180 | ||
2181 | /* The first two of these routines are ostensibly just intended to put | |
2182 | names into the asm. However, they are both hijacked in order to ensure | |
2183 | that zero-sized items do not make their way into the output. Consequently, | |
2184 | we also need to make these participate in provisions for dealing with | |
2185 | such items in section anchors. */ | |
2186 | ||
2187 | /* The implementation of ASM_DECLARE_OBJECT_NAME. */ | |
2188 | /* The RTTI data (e.g., __ti4name) is common and public (and static), | |
2189 | but it does need to be referenced via indirect PIC data pointers. | |
2190 | The machopic_define_symbol calls are telling the machopic subsystem | |
2191 | that the name *is* defined in this module, so it doesn't need to | |
2192 | make them indirect. */ | |
2193 | void | |
2194 | darwin_asm_declare_object_name (FILE *file, | |
2195 | const char *nam, tree decl) | |
2196 | { | |
2197 | const char *xname = nam; | |
2198 | unsigned HOST_WIDE_INT size; | |
2199 | bool local_def, weak; | |
2200 | ||
2201 | weak = (DECL_P (decl) | |
2202 | && DECL_WEAK (decl) | |
2203 | && !lookup_attribute ("weak_import", | |
2204 | DECL_ATTRIBUTES (decl))); | |
2205 | ||
2206 | local_def = DECL_INITIAL (decl) || (TREE_STATIC (decl) | |
2207 | && (!DECL_COMMON (decl) | |
2208 | || !TREE_PUBLIC (decl))); | |
2209 | ||
2210 | if (GET_CODE (XEXP (DECL_RTL (decl), 0)) != SYMBOL_REF) | |
2211 | xname = IDENTIFIER_POINTER (DECL_NAME (decl)); | |
2212 | ||
2213 | if (local_def) | |
2214 | { | |
2215 | (* targetm.encode_section_info) (decl, DECL_RTL (decl), false); | |
2216 | if (!weak) | |
2217 | machopic_define_symbol (DECL_RTL (decl)); | |
2218 | } | |
2219 | ||
e913b5cd | 2220 | size = tree_to_uhwi (DECL_SIZE_UNIT (decl)); |
8e79e9d4 | 2221 | |
2222 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2223 | fprintf (file, "# dadon: %s %s (%llu, %u) local %d weak %d" | |
2224 | " stat %d com %d pub %d t-const %d t-ro %d init %lx\n", | |
2225 | xname, (TREE_CODE (decl) == VAR_DECL?"var":"const"), | |
2226 | (unsigned long long)size, DECL_ALIGN (decl), local_def, | |
2227 | DECL_WEAK (decl), TREE_STATIC (decl), DECL_COMMON (decl), | |
2228 | TREE_PUBLIC (decl), TREE_CONSTANT (decl), TREE_READONLY (decl), | |
2229 | (unsigned long)DECL_INITIAL (decl)); | |
2230 | #endif | |
2231 | ||
2232 | /* Darwin needs help to support local zero-sized objects. | |
2233 | They must be made at least one byte, and the section containing must be | |
2234 | marked as unsuitable for section-anchors (see storage allocators below). | |
2235 | ||
2236 | For non-zero objects this output is handled by varasm.c. | |
2237 | */ | |
2238 | if (!size) | |
2239 | { | |
2240 | unsigned int l2align = 0; | |
2241 | ||
a967a7ec | 2242 | /* The align must be honored, even for zero-sized. */ |
8e79e9d4 | 2243 | if (DECL_ALIGN (decl)) |
2244 | { | |
2245 | l2align = floor_log2 (DECL_ALIGN (decl) / BITS_PER_UNIT); | |
2246 | fprintf (file, "\t.align\t%u\n", l2align); | |
2247 | } | |
2248 | ||
2249 | ASM_OUTPUT_LABEL (file, xname); | |
2250 | size = 1; | |
f03df321 | 2251 | fprintf (file, "\t.space\t" HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); |
8e79e9d4 | 2252 | |
2253 | /* Check that we've correctly picked up the zero-sized item and placed it | |
2254 | properly. */ | |
2255 | gcc_assert ((!DARWIN_SECTION_ANCHORS || !flag_section_anchors) | |
2256 | || (in_section | |
2257 | && (in_section->common.flags & SECTION_NO_ANCHOR))); | |
2258 | } | |
2259 | else | |
2260 | ASM_OUTPUT_LABEL (file, xname); | |
2261 | } | |
427eb138 | 2262 | |
8e79e9d4 | 2263 | /* The implementation of ASM_DECLARE_CONSTANT_NAME. */ |
427eb138 | 2264 | void |
2265 | darwin_asm_declare_constant_name (FILE *file, const char *name, | |
2266 | const_tree exp ATTRIBUTE_UNUSED, | |
2267 | HOST_WIDE_INT size) | |
2268 | { | |
2269 | assemble_label (file, name); | |
8e79e9d4 | 2270 | /* As for other items, we need at least one byte. */ |
2271 | if (!size) | |
2272 | { | |
2273 | fputs ("\t.space\t1\n", file); | |
2274 | /* Check that we've correctly picked up the zero-sized item and placed it | |
2275 | properly. */ | |
2276 | gcc_assert ((!DARWIN_SECTION_ANCHORS || !flag_section_anchors) | |
2277 | || (in_section | |
2278 | && (in_section->common.flags & SECTION_NO_ANCHOR))); | |
2279 | } | |
2280 | } | |
2281 | ||
2282 | /* Darwin storage allocators. | |
2283 | ||
2284 | Zerofill sections are desirable for large blank data since, otherwise, these | |
2285 | data bloat objects (PR33210). | |
2286 | ||
2287 | However, section anchors don't work in .zerofill sections (one cannot switch | |
2288 | to a zerofill section). Ergo, for Darwin targets using section anchors we need | |
2289 | to put (at least some) data into 'normal' switchable sections. | |
2290 | ||
2291 | Here we set a relatively arbitrary value for the size of an object to trigger | |
2292 | zerofill when section anchors are enabled (anything bigger than a page for | |
2293 | current Darwin implementations). FIXME: there ought to be some objective way | |
2294 | to make this choice. | |
2295 | ||
2296 | When section anchor are off this is ignored anyway. */ | |
2297 | ||
2298 | #define BYTES_ZFILL 4096 | |
2299 | ||
2300 | /* Emit a chunk of data for items coalesced by the linker. */ | |
2301 | static void | |
2302 | darwin_emit_weak_or_comdat (FILE *fp, tree decl, const char *name, | |
2303 | unsigned HOST_WIDE_INT size, | |
f199808c | 2304 | bool use_coal, |
8e79e9d4 | 2305 | unsigned int align) |
2306 | { | |
f199808c | 2307 | /* Since the sections used here are coalesced, they will not be eligible |
2308 | for section anchors, and therefore we don't need to break that out. | |
2309 | CHECKME: for modern linker on PowerPC. */ | |
8e79e9d4 | 2310 | if (TREE_READONLY (decl) || TREE_CONSTANT (decl)) |
f199808c | 2311 | switch_to_section (use_coal ? darwin_sections[const_data_coal_section] |
2312 | : darwin_sections[const_data_section]); | |
8e79e9d4 | 2313 | else |
f199808c | 2314 | switch_to_section (use_coal ? darwin_sections[data_coal_section] |
2315 | : data_section); | |
8e79e9d4 | 2316 | |
2317 | /* To be consistent, we'll allow darwin_asm_declare_object_name to assemble | |
2318 | the align info for zero-sized items... but do it here otherwise. */ | |
2319 | if (size && align) | |
2320 | fprintf (fp, "\t.align\t%d\n", floor_log2 (align / BITS_PER_UNIT)); | |
2321 | ||
2322 | if (TREE_PUBLIC (decl)) | |
2323 | darwin_globalize_label (fp, name); | |
2324 | ||
2325 | /* ... and we let it deal with outputting one byte of zero for them too. */ | |
2326 | darwin_asm_declare_object_name (fp, name, decl); | |
2327 | if (size) | |
2328 | assemble_zeros (size); | |
2329 | } | |
2330 | ||
267785bc | 2331 | /* Emit a chunk of data for ObjC meta-data that got placed in BSS erroneously. */ |
2332 | static void | |
2333 | darwin_emit_objc_zeroed (FILE *fp, tree decl, const char *name, | |
2334 | unsigned HOST_WIDE_INT size, | |
2335 | unsigned int align, tree meta) | |
2336 | { | |
2337 | section *ocs = data_section; | |
2338 | ||
2339 | if (TREE_PURPOSE (meta) == get_identifier("OBJC2META")) | |
2340 | ocs = darwin_objc2_section (decl, meta, ocs); | |
2341 | else | |
2342 | ocs = darwin_objc1_section (decl, meta, ocs); | |
2343 | ||
2344 | switch_to_section (ocs); | |
2345 | ||
2346 | /* We shall declare that zero-sized meta-data are not valid (yet). */ | |
2347 | gcc_assert (size); | |
2348 | fprintf (fp, "\t.align\t%d\n", floor_log2 (align / BITS_PER_UNIT)); | |
2349 | ||
2350 | /* ... and we let it deal with outputting one byte of zero for them too. */ | |
2351 | darwin_asm_declare_object_name (fp, name, decl); | |
2352 | assemble_zeros (size); | |
2353 | } | |
2354 | ||
8e79e9d4 | 2355 | /* This routine emits 'local' storage: |
2356 | ||
2357 | When Section Anchors are off this routine emits .zerofill commands in | |
2358 | sections named for their alignment. | |
2359 | ||
2360 | When Section Anchors are on, smaller (non-zero-sized) items are placed in | |
2361 | the .static_data section so that the section anchoring system can see them. | |
2362 | Larger items are still placed in .zerofill sections, addressing PR33210. | |
2363 | The routine has no checking - it is all assumed to be done by the caller. | |
2364 | */ | |
2365 | static void | |
2366 | darwin_emit_local_bss (FILE *fp, tree decl, const char *name, | |
2367 | unsigned HOST_WIDE_INT size, | |
2368 | unsigned int l2align) | |
2369 | { | |
2370 | /* FIXME: We have a fudge to make this work with Java even when the target does | |
2371 | not use sections anchors -- Java seems to need at least one small item in a | |
2372 | non-zerofill segment. */ | |
2373 | if ((DARWIN_SECTION_ANCHORS && flag_section_anchors && size < BYTES_ZFILL) | |
2374 | || (size && size <= 2)) | |
2375 | { | |
2376 | /* Put smaller objects in _static_data, where the section anchors system | |
2377 | can get them. | |
2378 | However, if they are zero-sized punt them to yet a different section | |
2379 | (that is not allowed to participate in anchoring). */ | |
2380 | if (!size) | |
2381 | { | |
2382 | fputs ("\t.section\t__DATA,__zobj_bss\n", fp); | |
2383 | in_section = darwin_sections[zobj_bss_section]; | |
2384 | size = 1; | |
2385 | } | |
2386 | else | |
2387 | { | |
2388 | fputs ("\t.static_data\n", fp); | |
2389 | in_section = darwin_sections[static_data_section]; | |
2390 | } | |
2391 | ||
2392 | if (l2align) | |
2393 | fprintf (fp, "\t.align\t%u\n", l2align); | |
2394 | ||
2395 | assemble_name (fp, name); | |
f03df321 | 2396 | fprintf (fp, ":\n\t.space\t" HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); |
8e79e9d4 | 2397 | } |
2398 | else | |
2399 | { | |
2400 | /* When we are on a non-section anchor target, we can get zero-sized | |
2401 | items here. However, all we need to do is to bump them to one byte | |
2402 | and the section alignment will take care of the rest. */ | |
2403 | char secnam[64]; | |
2404 | unsigned int flags ; | |
2405 | snprintf (secnam, 64, "__DATA,__%sbss%u", ((size)?"":"zo_"), | |
2406 | (unsigned) l2align); | |
2407 | /* We can't anchor (yet, if ever) in zerofill sections, because we can't | |
2408 | switch to them and emit a label. */ | |
2409 | flags = SECTION_BSS|SECTION_WRITE|SECTION_NO_ANCHOR; | |
2410 | in_section = get_section (secnam, flags, NULL); | |
2411 | fprintf (fp, "\t.zerofill %s,", secnam); | |
2412 | assemble_name (fp, name); | |
2413 | if (!size) | |
2414 | size = 1; | |
2415 | ||
2416 | if (l2align) | |
f03df321 | 2417 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", |
8e79e9d4 | 2418 | size, (unsigned) l2align); |
2419 | else | |
f03df321 | 2420 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); |
8e79e9d4 | 2421 | } |
2422 | ||
2423 | (*targetm.encode_section_info) (decl, DECL_RTL (decl), false); | |
2424 | /* This is defined as a file-scope var, so we know to notify machopic. */ | |
2425 | machopic_define_symbol (DECL_RTL (decl)); | |
2426 | } | |
2427 | ||
2428 | /* Emit a chunk of common. */ | |
2429 | static void | |
2430 | darwin_emit_common (FILE *fp, const char *name, | |
2431 | unsigned HOST_WIDE_INT size, unsigned int align) | |
2432 | { | |
2433 | unsigned HOST_WIDE_INT rounded; | |
2434 | unsigned int l2align; | |
427eb138 | 2435 | |
8e79e9d4 | 2436 | /* Earlier systems complain if the alignment exceeds the page size. |
2437 | The magic number is 4096 * 8 - hard-coded for legacy systems. */ | |
2438 | if (!emit_aligned_common && (align > 32768UL)) | |
2439 | align = 4096UL; /* In units. */ | |
2440 | else | |
2441 | align /= BITS_PER_UNIT; | |
2442 | ||
2443 | /* Make sure we have a meaningful align. */ | |
2444 | if (!align) | |
2445 | align = 1; | |
2446 | ||
2447 | /* For earlier toolchains, we need to emit the var as a rounded size to | |
2448 | tell ld the alignment. */ | |
2449 | if (size < align) | |
2450 | rounded = align; | |
2451 | else | |
2452 | rounded = (size + (align-1)) & ~(align-1); | |
2453 | ||
2454 | l2align = floor_log2 (align); | |
2455 | gcc_assert (l2align <= L2_MAX_OFILE_ALIGNMENT); | |
2456 | ||
2457 | in_section = comm_section; | |
2458 | /* We mustn't allow multiple public symbols to share an address when using | |
2459 | the normal OSX toolchain. */ | |
2460 | if (!size) | |
2461 | { | |
2462 | /* Put at least one byte. */ | |
2463 | size = 1; | |
2464 | /* This section can no longer participate in section anchoring. */ | |
2465 | comm_section->common.flags |= SECTION_NO_ANCHOR; | |
2466 | } | |
2467 | ||
2468 | fputs ("\t.comm\t", fp); | |
2469 | assemble_name (fp, name); | |
2470 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED, | |
2471 | emit_aligned_common?size:rounded); | |
2472 | if (l2align && emit_aligned_common) | |
2473 | fprintf (fp, ",%u", l2align); | |
2474 | fputs ("\n", fp); | |
2475 | } | |
2476 | ||
2477 | /* Output a var which is all zero - into aligned BSS sections, common, lcomm | |
2478 | or coalescable data sections (for weak or comdat) as appropriate. */ | |
2479 | ||
2480 | void | |
2481 | darwin_output_aligned_bss (FILE *fp, tree decl, const char *name, | |
2482 | unsigned HOST_WIDE_INT size, unsigned int align) | |
2483 | { | |
2484 | unsigned int l2align; | |
2485 | bool one, pub, weak; | |
267785bc | 2486 | tree meta; |
8e79e9d4 | 2487 | |
2488 | pub = TREE_PUBLIC (decl); | |
2489 | one = DECL_ONE_ONLY (decl); | |
2490 | weak = (DECL_P (decl) | |
2491 | && DECL_WEAK (decl) | |
2492 | && !lookup_attribute ("weak_import", | |
2493 | DECL_ATTRIBUTES (decl))); | |
2494 | ||
2495 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2496 | fprintf (fp, "# albss: %s (%lld,%d) ro %d cst %d stat %d com %d" | |
2497 | " pub %d weak %d one %d init %lx\n", | |
2498 | name, (long long)size, (int)align, TREE_READONLY (decl), | |
2499 | TREE_CONSTANT (decl), TREE_STATIC (decl), DECL_COMMON (decl), | |
2500 | pub, weak, one, (unsigned long)DECL_INITIAL (decl)); | |
2501 | #endif | |
2502 | ||
267785bc | 2503 | /* ObjC metadata can get put in BSS because varasm.c decides it's BSS |
2504 | before the target has a chance to comment. */ | |
2505 | if ((meta = is_objc_metadata (decl))) | |
2506 | { | |
2507 | darwin_emit_objc_zeroed (fp, decl, name, size, DECL_ALIGN (decl), meta); | |
2508 | return; | |
2509 | } | |
2510 | ||
8e79e9d4 | 2511 | /* Check that any initializer is valid. */ |
2512 | gcc_assert ((DECL_INITIAL (decl) == NULL) | |
2513 | || (DECL_INITIAL (decl) == error_mark_node) | |
2514 | || initializer_zerop (DECL_INITIAL (decl))); | |
2515 | ||
2516 | gcc_assert (DECL_SECTION_NAME (decl) == NULL); | |
2517 | gcc_assert (!DECL_COMMON (decl)); | |
2518 | ||
2519 | /* Pick up the correct alignment. */ | |
2520 | if (!size || !align) | |
2521 | align = DECL_ALIGN (decl); | |
2522 | ||
2523 | l2align = floor_log2 (align / BITS_PER_UNIT); | |
2524 | gcc_assert (l2align <= L2_MAX_OFILE_ALIGNMENT); | |
2525 | ||
2526 | last_assemble_variable_decl = decl; | |
2527 | ||
2528 | /* We would rather not have to check this here - but it seems that we might | |
2529 | be passed a decl that should be in coalesced space. */ | |
2530 | if (one || weak) | |
2531 | { | |
a967a7ec | 2532 | /* Weak or COMDAT objects are put in mergeable sections. */ |
8e79e9d4 | 2533 | darwin_emit_weak_or_comdat (fp, decl, name, size, |
f199808c | 2534 | ld_uses_coal_sects, DECL_ALIGN (decl)); |
8e79e9d4 | 2535 | return; |
2536 | } | |
2537 | ||
2538 | /* If this is not public, then emit according to local rules. */ | |
2539 | if (!pub) | |
2540 | { | |
2541 | darwin_emit_local_bss (fp, decl, name, size, l2align); | |
2542 | return; | |
2543 | } | |
2544 | ||
2545 | /* So we have a public symbol (small item fudge for Java, see above). */ | |
2546 | if ((DARWIN_SECTION_ANCHORS && flag_section_anchors && size < BYTES_ZFILL) | |
2547 | || (size && size <= 2)) | |
2548 | { | |
2549 | /* Put smaller objects in data, where the section anchors system can get | |
2550 | them. However, if they are zero-sized punt them to yet a different | |
2551 | section (that is not allowed to participate in anchoring). */ | |
2552 | if (!size) | |
2553 | { | |
2554 | fputs ("\t.section\t__DATA,__zobj_data\n", fp); | |
2555 | in_section = darwin_sections[zobj_data_section]; | |
2556 | size = 1; | |
2557 | } | |
2558 | else | |
2559 | { | |
2560 | fputs ("\t.data\n", fp); | |
2561 | in_section = data_section; | |
2562 | } | |
2563 | ||
2564 | if (l2align) | |
2565 | fprintf (fp, "\t.align\t%u\n", l2align); | |
2566 | ||
2567 | assemble_name (fp, name); | |
f03df321 | 2568 | fprintf (fp, ":\n\t.space\t" HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); |
8e79e9d4 | 2569 | } |
2570 | else | |
2571 | { | |
2572 | char secnam[64]; | |
2573 | unsigned int flags ; | |
2574 | /* When we are on a non-section anchor target, we can get zero-sized | |
2575 | items here. However, all we need to do is to bump them to one byte | |
2576 | and the section alignment will take care of the rest. */ | |
2577 | snprintf (secnam, 64, "__DATA,__%spu_bss%u", ((size)?"":"zo_"), l2align); | |
2578 | ||
2579 | /* We can't anchor in zerofill sections, because we can't switch | |
2580 | to them and emit a label. */ | |
2581 | flags = SECTION_BSS|SECTION_WRITE|SECTION_NO_ANCHOR; | |
2582 | in_section = get_section (secnam, flags, NULL); | |
2583 | fprintf (fp, "\t.zerofill %s,", secnam); | |
2584 | assemble_name (fp, name); | |
2585 | if (!size) | |
2586 | size = 1; | |
2587 | ||
2588 | if (l2align) | |
f03df321 | 2589 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", size, l2align); |
8e79e9d4 | 2590 | else |
f03df321 | 2591 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); |
8e79e9d4 | 2592 | } |
2593 | (* targetm.encode_section_info) (decl, DECL_RTL (decl), false); | |
2594 | } | |
2595 | ||
2596 | /* Output a chunk of common, with alignment specified (where the target | |
2597 | supports this). */ | |
2598 | void | |
2599 | darwin_asm_output_aligned_decl_common (FILE *fp, tree decl, const char *name, | |
2600 | unsigned HOST_WIDE_INT size, | |
2601 | unsigned int align) | |
2602 | { | |
2603 | unsigned int l2align; | |
2604 | bool one, weak; | |
267785bc | 2605 | tree meta; |
2606 | ||
8e79e9d4 | 2607 | /* No corresponding var. */ |
2608 | if (decl==NULL) | |
2609 | { | |
2610 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2611 | fprintf (fp, "# adcom: %s (%d,%d) decl=0x0\n", name, (int)size, (int)align); | |
2612 | #endif | |
2613 | darwin_emit_common (fp, name, size, align); | |
2614 | return; | |
2615 | } | |
2616 | ||
2617 | one = DECL_ONE_ONLY (decl); | |
2618 | weak = (DECL_P (decl) | |
2619 | && DECL_WEAK (decl) | |
2620 | && !lookup_attribute ("weak_import", | |
2621 | DECL_ATTRIBUTES (decl))); | |
2622 | ||
2623 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2624 | fprintf (fp, "# adcom: %s (%lld,%d) ro %d cst %d stat %d com %d pub %d" | |
2625 | " weak %d one %d init %lx\n", | |
2626 | name, (long long)size, (int)align, TREE_READONLY (decl), | |
2627 | TREE_CONSTANT (decl), TREE_STATIC (decl), DECL_COMMON (decl), | |
2628 | TREE_PUBLIC (decl), weak, one, (unsigned long)DECL_INITIAL (decl)); | |
2629 | #endif | |
2630 | ||
267785bc | 2631 | /* ObjC metadata can get put in BSS because varasm.c decides it's BSS |
2632 | before the target has a chance to comment. */ | |
2633 | if ((meta = is_objc_metadata (decl))) | |
2634 | { | |
2635 | darwin_emit_objc_zeroed (fp, decl, name, size, DECL_ALIGN (decl), meta); | |
2636 | return; | |
2637 | } | |
2638 | ||
8e79e9d4 | 2639 | /* We shouldn't be messing with this if the decl has a section name. */ |
2640 | gcc_assert (DECL_SECTION_NAME (decl) == NULL); | |
2641 | ||
2642 | /* We would rather not have to check this here - but it seems that we might | |
2643 | be passed a decl that should be in coalesced space. */ | |
2644 | if (one || weak) | |
2645 | { | |
2646 | /* Weak or COMDAT objects are put in mergable sections. */ | |
2647 | darwin_emit_weak_or_comdat (fp, decl, name, size, | |
f199808c | 2648 | ld_uses_coal_sects, DECL_ALIGN (decl)); |
8e79e9d4 | 2649 | return; |
2650 | } | |
2651 | ||
2652 | /* We should only get here for DECL_COMMON, with a zero init (and, in | |
2653 | principle, only for public symbols too - although we deal with local | |
2654 | ones below). */ | |
2655 | ||
2656 | /* Check the initializer is OK. */ | |
2657 | gcc_assert (DECL_COMMON (decl) | |
2658 | && ((DECL_INITIAL (decl) == NULL) | |
2659 | || (DECL_INITIAL (decl) == error_mark_node) | |
2660 | || initializer_zerop (DECL_INITIAL (decl)))); | |
2661 | ||
2662 | last_assemble_variable_decl = decl; | |
2663 | ||
2664 | if (!size || !align) | |
2665 | align = DECL_ALIGN (decl); | |
2666 | ||
2667 | l2align = floor_log2 (align / BITS_PER_UNIT); | |
2668 | /* Check we aren't asking for more aligment than the platform allows. */ | |
2669 | gcc_assert (l2align <= L2_MAX_OFILE_ALIGNMENT); | |
2670 | ||
2671 | if (TREE_PUBLIC (decl) != 0) | |
2672 | darwin_emit_common (fp, name, size, align); | |
2673 | else | |
2674 | darwin_emit_local_bss (fp, decl, name, size, l2align); | |
2675 | } | |
2676 | ||
2677 | /* Output a chunk of BSS with alignment specfied. */ | |
2678 | void | |
2679 | darwin_asm_output_aligned_decl_local (FILE *fp, tree decl, const char *name, | |
2680 | unsigned HOST_WIDE_INT size, | |
2681 | unsigned int align) | |
2682 | { | |
2683 | unsigned long l2align; | |
2684 | bool one, weak; | |
267785bc | 2685 | tree meta; |
8e79e9d4 | 2686 | |
2687 | one = DECL_ONE_ONLY (decl); | |
2688 | weak = (DECL_P (decl) | |
2689 | && DECL_WEAK (decl) | |
2690 | && !lookup_attribute ("weak_import", | |
2691 | DECL_ATTRIBUTES (decl))); | |
2692 | ||
2693 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2694 | fprintf (fp, "# adloc: %s (%lld,%d) ro %d cst %d stat %d one %d pub %d" | |
2695 | " weak %d init %lx\n", | |
2696 | name, (long long)size, (int)align, TREE_READONLY (decl), | |
2697 | TREE_CONSTANT (decl), TREE_STATIC (decl), one, TREE_PUBLIC (decl), | |
2698 | weak , (unsigned long)DECL_INITIAL (decl)); | |
2699 | #endif | |
2700 | ||
267785bc | 2701 | /* ObjC metadata can get put in BSS because varasm.c decides it's BSS |
2702 | before the target has a chance to comment. */ | |
2703 | if ((meta = is_objc_metadata (decl))) | |
2704 | { | |
2705 | darwin_emit_objc_zeroed (fp, decl, name, size, DECL_ALIGN (decl), meta); | |
2706 | return; | |
2707 | } | |
2708 | ||
8e79e9d4 | 2709 | /* We shouldn't be messing with this if the decl has a section name. */ |
2710 | gcc_assert (DECL_SECTION_NAME (decl) == NULL); | |
2711 | ||
2712 | /* We would rather not have to check this here - but it seems that we might | |
2713 | be passed a decl that should be in coalesced space. */ | |
2714 | if (one || weak) | |
2715 | { | |
2716 | /* Weak or COMDAT objects are put in mergable sections. */ | |
2717 | darwin_emit_weak_or_comdat (fp, decl, name, size, | |
f199808c | 2718 | ld_uses_coal_sects, DECL_ALIGN (decl)); |
8e79e9d4 | 2719 | return; |
2720 | } | |
2721 | ||
2722 | /* .. and it should be suitable for placement in local mem. */ | |
2723 | gcc_assert(!TREE_PUBLIC (decl) && !DECL_COMMON (decl)); | |
2724 | /* .. and any initializer must be all-zero. */ | |
2725 | gcc_assert ((DECL_INITIAL (decl) == NULL) | |
2726 | || (DECL_INITIAL (decl) == error_mark_node) | |
2727 | || initializer_zerop (DECL_INITIAL (decl))); | |
2728 | ||
2729 | last_assemble_variable_decl = decl; | |
2730 | ||
2731 | if (!size || !align) | |
2732 | align = DECL_ALIGN (decl); | |
2733 | ||
2734 | l2align = floor_log2 (align / BITS_PER_UNIT); | |
2735 | gcc_assert (l2align <= L2_MAX_OFILE_ALIGNMENT); | |
2736 | ||
2737 | darwin_emit_local_bss (fp, decl, name, size, l2align); | |
427eb138 | 2738 | } |
2739 | ||
2c5b6111 | 2740 | /* Emit an assembler directive to set visibility for a symbol. The |
2741 | only supported visibilities are VISIBILITY_DEFAULT and | |
2742 | VISIBILITY_HIDDEN; the latter corresponds to Darwin's "private | |
2743 | extern". There is no MACH-O equivalent of ELF's | |
2744 | VISIBILITY_INTERNAL or VISIBILITY_PROTECTED. */ | |
2745 | ||
b215c058 | 2746 | void |
2c5b6111 | 2747 | darwin_assemble_visibility (tree decl, int vis) |
2748 | { | |
2749 | if (vis == VISIBILITY_DEFAULT) | |
2750 | ; | |
a115dd2c | 2751 | else if (vis == VISIBILITY_HIDDEN || vis == VISIBILITY_INTERNAL) |
2c5b6111 | 2752 | { |
2753 | fputs ("\t.private_extern ", asm_out_file); | |
2754 | assemble_name (asm_out_file, | |
2755 | (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)))); | |
2756 | fputs ("\n", asm_out_file); | |
2757 | } | |
2758 | else | |
a115dd2c | 2759 | warning (OPT_Wattributes, "protected visibility attribute " |
9b2d6d13 | 2760 | "not supported in this configuration; ignored"); |
2c5b6111 | 2761 | } |
2762 | ||
f1f41a6c | 2763 | /* vec used by darwin_asm_dwarf_section. |
edea89b9 | 2764 | Maybe a hash tab would be better here - but the intention is that this is |
2765 | a very short list (fewer than 16 items) and each entry should (ideally, | |
2766 | eventually) only be presented once. | |
2767 | ||
2768 | A structure to hold a dwarf debug section used entry. */ | |
2769 | ||
2770 | typedef struct GTY(()) dwarf_sect_used_entry { | |
2771 | const char *name; | |
2772 | unsigned count; | |
2773 | } | |
2774 | dwarf_sect_used_entry; | |
2775 | ||
edea89b9 | 2776 | |
2777 | /* A list of used __DWARF sections. */ | |
f1f41a6c | 2778 | static GTY (()) vec<dwarf_sect_used_entry, va_gc> *dwarf_sect_names_table; |
edea89b9 | 2779 | |
2780 | /* This is called when we are asked to assemble a named section and the | |
2781 | name begins with __DWARF,. We keep a list of the section names (without | |
2782 | the __DWARF, prefix) and use this to emit our required start label on the | |
2783 | first switch to each section. */ | |
2784 | ||
2785 | static void | |
2786 | darwin_asm_dwarf_section (const char *name, unsigned int flags, | |
2787 | tree ARG_UNUSED (decl)) | |
2788 | { | |
2789 | unsigned i; | |
2790 | int namelen; | |
2791 | const char * sname; | |
2792 | dwarf_sect_used_entry *ref; | |
2793 | bool found = false; | |
2794 | gcc_assert ((flags & (SECTION_DEBUG | SECTION_NAMED)) | |
2795 | == (SECTION_DEBUG | SECTION_NAMED)); | |
2796 | /* We know that the name starts with __DWARF, */ | |
2797 | sname = name + 8; | |
2798 | namelen = strchr (sname, ',') - sname; | |
2799 | gcc_assert (namelen); | |
2800 | if (dwarf_sect_names_table == NULL) | |
f1f41a6c | 2801 | vec_alloc (dwarf_sect_names_table, 16); |
edea89b9 | 2802 | else |
2803 | for (i = 0; | |
f1f41a6c | 2804 | dwarf_sect_names_table->iterate (i, &ref); |
edea89b9 | 2805 | i++) |
2806 | { | |
2807 | if (!ref) | |
2808 | break; | |
2809 | if (!strcmp (ref->name, sname)) | |
2810 | { | |
2811 | found = true; | |
2812 | ref->count++; | |
2813 | break; | |
2814 | } | |
2815 | } | |
2816 | ||
2817 | fprintf (asm_out_file, "\t.section %s\n", name); | |
2818 | if (!found) | |
2819 | { | |
2820 | dwarf_sect_used_entry e; | |
2821 | fprintf (asm_out_file, "Lsection%.*s:\n", namelen, sname); | |
2822 | e.count = 1; | |
2823 | e.name = xstrdup (sname); | |
f1f41a6c | 2824 | vec_safe_push (dwarf_sect_names_table, e); |
edea89b9 | 2825 | } |
2826 | } | |
2827 | ||
a08b74c8 | 2828 | /* Output a difference of two labels that will be an assembly time |
2829 | constant if the two labels are local. (.long lab1-lab2 will be | |
2830 | very different if lab1 is at the boundary between two sections; it | |
2831 | will be relocated according to the second section, not the first, | |
2832 | so one ends up with a difference between labels in different | |
2833 | sections, which is bad in the dwarf2 eh context for instance.) */ | |
2834 | ||
2835 | static int darwin_dwarf_label_counter; | |
2836 | ||
2837 | void | |
85d3e3b5 | 2838 | darwin_asm_output_dwarf_delta (FILE *file, int size, |
e1719e76 | 2839 | const char *lab1, const char *lab2, |
2840 | HOST_WIDE_INT offset) | |
a08b74c8 | 2841 | { |
2f9fc8ef | 2842 | int islocaldiff = (lab1[0] == '*' && lab1[1] == 'L' |
2843 | && lab2[0] == '*' && lab2[1] == 'L'); | |
dcf3c3f7 | 2844 | const char *directive = (size == 8 ? ".quad" : ".long"); |
a08b74c8 | 2845 | |
2846 | if (islocaldiff) | |
2847 | fprintf (file, "\t.set L$set$%d,", darwin_dwarf_label_counter); | |
2848 | else | |
85d3e3b5 | 2849 | fprintf (file, "\t%s\t", directive); |
8e79e9d4 | 2850 | |
48126f0c | 2851 | assemble_name_raw (file, lab1); |
a08b74c8 | 2852 | fprintf (file, "-"); |
48126f0c | 2853 | assemble_name_raw (file, lab2); |
e1719e76 | 2854 | if (offset != 0) |
2855 | fprintf (file, "+" HOST_WIDE_INT_PRINT_DEC, offset); | |
a08b74c8 | 2856 | if (islocaldiff) |
85d3e3b5 | 2857 | fprintf (file, "\n\t%s L$set$%d", directive, darwin_dwarf_label_counter++); |
a08b74c8 | 2858 | } |
d08d29c0 | 2859 | |
d08d29c0 | 2860 | /* Output an offset in a DWARF section on Darwin. On Darwin, DWARF section |
2861 | offsets are not represented using relocs in .o files; either the | |
2862 | section never leaves the .o file, or the linker or other tool is | |
2863 | responsible for parsing the DWARF and updating the offsets. */ | |
2864 | ||
2865 | void | |
2866 | darwin_asm_output_dwarf_offset (FILE *file, int size, const char * lab, | |
e1719e76 | 2867 | HOST_WIDE_INT offset, section *base) |
d08d29c0 | 2868 | { |
2869 | char sname[64]; | |
2870 | int namelen; | |
f720b7c6 | 2871 | |
d08d29c0 | 2872 | gcc_assert (base->common.flags & SECTION_NAMED); |
2873 | gcc_assert (strncmp (base->named.name, "__DWARF,", 8) == 0); | |
2874 | gcc_assert (strchr (base->named.name + 8, ',')); | |
2875 | ||
2876 | namelen = strchr (base->named.name + 8, ',') - (base->named.name + 8); | |
2877 | sprintf (sname, "*Lsection%.*s", namelen, base->named.name + 8); | |
e1719e76 | 2878 | darwin_asm_output_dwarf_delta (file, size, lab, sname, offset); |
d08d29c0 | 2879 | } |
a08b74c8 | 2880 | |
13e2f0a0 | 2881 | /* Called from the within the TARGET_ASM_FILE_START for each target. */ |
edea89b9 | 2882 | |
2883 | void | |
2884 | darwin_file_start (void) | |
2885 | { | |
13e2f0a0 | 2886 | /* Nothing to do. */ |
edea89b9 | 2887 | } |
2888 | ||
2889 | /* Called for the TARGET_ASM_FILE_END hook. | |
2890 | Emit the mach-o pic indirection data, the lto data and, finally a flag | |
2891 | to tell the linker that it can break the file object into sections and | |
2892 | move those around for efficiency. */ | |
2893 | ||
f6940372 | 2894 | void |
b40da9a7 | 2895 | darwin_file_end (void) |
f6940372 | 2896 | { |
4b313269 | 2897 | if (!vec_safe_is_empty (ctors)) |
ed161dab | 2898 | finalize_ctors (); |
2899 | if (!vec_safe_is_empty (dtors)) | |
2900 | finalize_dtors (); | |
236ce1d1 | 2901 | |
2902 | /* If we are expecting to output NeXT ObjC meta-data, (and we actually see | |
2903 | some) then we output the fix-and-continue marker (Image Info). | |
2904 | This applies to Objective C, Objective C++ and LTO with either language | |
2905 | as part of the input. */ | |
2906 | if (flag_next_runtime && objc_metadata_seen) | |
2907 | { | |
2908 | unsigned int flags = 0; | |
2909 | if (flag_objc_abi >= 2) | |
2910 | { | |
2911 | flags = 16; | |
2912 | output_section_asm_op | |
2913 | (darwin_sections[objc2_image_info_section]->unnamed.data); | |
2914 | } | |
2915 | else | |
2916 | output_section_asm_op | |
2917 | (darwin_sections[objc_image_info_section]->unnamed.data); | |
2918 | ||
2919 | ASM_OUTPUT_ALIGN (asm_out_file, 2); | |
2920 | fputs ("L_OBJC_ImageInfo:\n", asm_out_file); | |
2921 | ||
2922 | flags |= (flag_replace_objc_classes && classes_seen) ? 1 : 0; | |
2923 | flags |= flag_objc_gc ? 2 : 0; | |
2924 | ||
2925 | fprintf (asm_out_file, "\t.long\t0\n\t.long\t%u\n", flags); | |
2926 | } | |
2927 | ||
f6940372 | 2928 | machopic_finish (asm_out_file); |
3a4a2292 | 2929 | if (lang_GNU_CXX ()) |
f6940372 | 2930 | { |
92e4ba7d | 2931 | switch_to_section (darwin_sections[constructor_section]); |
2932 | switch_to_section (darwin_sections[destructor_section]); | |
f6940372 | 2933 | ASM_OUTPUT_ALIGN (asm_out_file, 1); |
2934 | } | |
23433d72 | 2935 | |
2936 | /* If there was LTO assembler output, append it to asm_out_file. */ | |
2937 | if (lto_asm_out_name) | |
2938 | { | |
2939 | int n; | |
2940 | char *buf, *lto_asm_txt; | |
2941 | ||
2942 | /* Shouldn't be here if we failed to switch back. */ | |
2943 | gcc_assert (! saved_asm_out_file); | |
2944 | ||
2945 | lto_asm_out_file = fopen (lto_asm_out_name, "r"); | |
2946 | if (lto_asm_out_file == NULL) | |
c05be867 | 2947 | fatal_error (input_location, |
2948 | "failed to open temporary file %s with LTO output", | |
23433d72 | 2949 | lto_asm_out_name); |
2950 | fseek (lto_asm_out_file, 0, SEEK_END); | |
2951 | n = ftell (lto_asm_out_file); | |
2952 | if (n > 0) | |
2953 | { | |
2954 | fseek (lto_asm_out_file, 0, SEEK_SET); | |
2955 | lto_asm_txt = buf = (char *) xmalloc (n + 1); | |
2956 | while (fgets (lto_asm_txt, n, lto_asm_out_file)) | |
2957 | fputs (lto_asm_txt, asm_out_file); | |
13e2f0a0 | 2958 | /* Put a termination label. */ |
2959 | fprintf (asm_out_file, "\t.section %s,%s,regular,debug\n", | |
2960 | LTO_SEGMENT_NAME, LTO_SECTS_SECTION); | |
2961 | fprintf (asm_out_file, "L_GNU_LTO%d:\t;# end of lto\n", | |
2962 | lto_section_num); | |
2963 | /* Make sure our termination label stays in this section. */ | |
2964 | fputs ("\t.space\t1\n", asm_out_file); | |
23433d72 | 2965 | } |
2966 | ||
2967 | /* Remove the temporary file. */ | |
2968 | fclose (lto_asm_out_file); | |
2969 | unlink_if_ordinary (lto_asm_out_name); | |
2970 | free (lto_asm_out_name); | |
2971 | } | |
2972 | ||
13e2f0a0 | 2973 | /* Output the names and indices. */ |
f1f41a6c | 2974 | if (lto_section_names && lto_section_names->length ()) |
23433d72 | 2975 | { |
13e2f0a0 | 2976 | int count; |
2977 | darwin_lto_section_e *ref; | |
2978 | /* For now, we'll make the offsets 4 bytes and unaligned - we'll fix | |
2979 | the latter up ourselves. */ | |
2980 | const char *op = integer_asm_op (4,0); | |
2981 | ||
2982 | /* Emit the names. */ | |
2983 | fprintf (asm_out_file, "\t.section %s,%s,regular,debug\n", | |
23433d72 | 2984 | LTO_SEGMENT_NAME, LTO_NAMES_SECTION); |
f1f41a6c | 2985 | FOR_EACH_VEC_ELT (*lto_section_names, count, ref) |
13e2f0a0 | 2986 | { |
2987 | fprintf (asm_out_file, "L_GNU_LTO_NAME%d:\n", count); | |
2988 | /* We have to jump through hoops to get the values of the intra-section | |
2989 | offsets... */ | |
2990 | fprintf (asm_out_file, | |
2991 | "\t.set L$gnu$lto$noff%d,L_GNU_LTO_NAME%d-L_GNU_LTO_NAME0\n", | |
2992 | count, count); | |
2993 | fprintf (asm_out_file, | |
2994 | "\t.set L$gnu$lto$nsiz%d,L_GNU_LTO_NAME%d-L_GNU_LTO_NAME%d\n", | |
2995 | count, count+1, count); | |
2996 | fprintf (asm_out_file, "\t.asciz\t\"%s\"\n", ref->sectname); | |
2997 | } | |
2998 | fprintf (asm_out_file, "L_GNU_LTO_NAME%d:\t;# end\n", lto_section_num); | |
2999 | /* make sure our termination label stays in this section. */ | |
3000 | fputs ("\t.space\t1\n", asm_out_file); | |
3001 | ||
3002 | /* Emit the Index. */ | |
3003 | fprintf (asm_out_file, "\t.section %s,%s,regular,debug\n", | |
3004 | LTO_SEGMENT_NAME, LTO_INDEX_SECTION); | |
3005 | fputs ("\t.align\t2\n", asm_out_file); | |
3006 | fputs ("# Section offset, Section length, Name offset, Name length\n", | |
3007 | asm_out_file); | |
f1f41a6c | 3008 | FOR_EACH_VEC_ELT (*lto_section_names, count, ref) |
13e2f0a0 | 3009 | { |
3010 | fprintf (asm_out_file, "%s L$gnu$lto$offs%d\t;# %s\n", | |
3011 | op, count, ref->sectname); | |
3012 | fprintf (asm_out_file, "%s L$gnu$lto$size%d\n", op, count); | |
3013 | fprintf (asm_out_file, "%s L$gnu$lto$noff%d\n", op, count); | |
3014 | fprintf (asm_out_file, "%s L$gnu$lto$nsiz%d\n", op, count); | |
3015 | } | |
23433d72 | 3016 | } |
23433d72 | 3017 | |
8e79e9d4 | 3018 | /* If we have section anchors, then we must prevent the linker from |
3019 | re-arranging data. */ | |
3020 | if (!DARWIN_SECTION_ANCHORS || !flag_section_anchors) | |
3021 | fprintf (asm_out_file, "\t.subsections_via_symbols\n"); | |
f6940372 | 3022 | } |
3023 | ||
5b182752 | 3024 | /* TODO: Add a language hook for identifying if a decl is a vtable. */ |
3025 | #define DARWIN_VTABLE_P(DECL) 0 | |
3026 | ||
0765d519 | 3027 | /* Cross-module name binding. Darwin does not support overriding |
5b182752 | 3028 | functions at dynamic-link time, except for vtables in kexts. */ |
0765d519 | 3029 | |
3030 | bool | |
a9f1838b | 3031 | darwin_binds_local_p (const_tree decl) |
0765d519 | 3032 | { |
5b182752 | 3033 | return default_binds_local_p_1 (decl, |
3034 | TARGET_KEXTABI && DARWIN_VTABLE_P (decl)); | |
0765d519 | 3035 | } |
3036 | ||
8c27005f | 3037 | /* The Darwin's implementation of TARGET_ASM_OUTPUT_ANCHOR. Define the |
3038 | anchor relative to ".", the current section position. We cannot use | |
3039 | the default one because ASM_OUTPUT_DEF is wrong for Darwin. */ | |
8c27005f | 3040 | void |
3041 | darwin_asm_output_anchor (rtx symbol) | |
3042 | { | |
3043 | fprintf (asm_out_file, "\t.set\t"); | |
3044 | assemble_name (asm_out_file, XSTR (symbol, 0)); | |
3045 | fprintf (asm_out_file, ", . + " HOST_WIDE_INT_PRINT_DEC "\n", | |
3046 | SYMBOL_REF_BLOCK_OFFSET (symbol)); | |
3047 | } | |
8e79e9d4 | 3048 | |
8b1fba2c | 3049 | /* Disable section anchoring on any section containing a zero-sized |
8e79e9d4 | 3050 | object. */ |
3051 | bool | |
3052 | darwin_use_anchors_for_symbol_p (const_rtx symbol) | |
3053 | { | |
8b1fba2c | 3054 | if (DARWIN_SECTION_ANCHORS && flag_section_anchors) |
8e79e9d4 | 3055 | { |
3056 | section *sect; | |
3057 | /* If the section contains a zero-sized object it's ineligible. */ | |
3058 | sect = SYMBOL_REF_BLOCK (symbol)->sect; | |
3059 | /* This should have the effect of disabling anchors for vars that follow | |
8b1fba2c | 3060 | any zero-sized one, in a given section. */ |
8e79e9d4 | 3061 | if (sect->common.flags & SECTION_NO_ANCHOR) |
3062 | return false; | |
3063 | ||
8b1fba2c | 3064 | /* Also check the normal reasons for suppressing. */ |
3065 | return default_use_anchors_for_symbol_p (symbol); | |
8e79e9d4 | 3066 | } |
3067 | else | |
3068 | return false; | |
3069 | } | |
8c27005f | 3070 | |
f720b7c6 | 3071 | /* Set the darwin specific attributes on TYPE. */ |
3072 | void | |
3073 | darwin_set_default_type_attributes (tree type) | |
3074 | { | |
3075 | if (darwin_ms_struct | |
3076 | && TREE_CODE (type) == RECORD_TYPE) | |
3077 | TYPE_ATTRIBUTES (type) = tree_cons (get_identifier ("ms_struct"), | |
3078 | NULL_TREE, | |
3079 | TYPE_ATTRIBUTES (type)); | |
3080 | } | |
3081 | ||
26ac986e | 3082 | /* True, iff we're generating code for loadable kernel extensions. */ |
5b182752 | 3083 | |
3084 | bool | |
3085 | darwin_kextabi_p (void) { | |
3086 | return flag_apple_kext; | |
3087 | } | |
3088 | ||
3089 | void | |
3090 | darwin_override_options (void) | |
3091 | { | |
9e09909d | 3092 | /* Keep track of which (major) version we're generating code for. */ |
3093 | if (darwin_macosx_version_min) | |
3094 | { | |
3095 | if (strverscmp (darwin_macosx_version_min, "10.6") >= 0) | |
3096 | generating_for_darwin_version = 10; | |
3097 | else if (strverscmp (darwin_macosx_version_min, "10.5") >= 0) | |
3098 | generating_for_darwin_version = 9; | |
3099 | ||
3100 | /* Earlier versions are not specifically accounted, until required. */ | |
3101 | } | |
8e79e9d4 | 3102 | |
f199808c | 3103 | /* Older Darwin ld could not coalesce weak entities without them being |
3104 | placed in special sections. */ | |
3105 | if (darwin_target_linker | |
3106 | && (strverscmp (darwin_target_linker, MIN_LD64_NO_COAL_SECTS) < 0)) | |
3107 | ld_uses_coal_sects = true; | |
3108 | ||
3f3d5ad4 | 3109 | /* In principle, this should be c-family only. However, we really need to |
3110 | set sensible defaults for LTO as well, since the section selection stuff | |
3111 | should check for correctness re. the ABI. TODO: check and provide the | |
3112 | flags (runtime & ABI) from the lto wrapper). */ | |
3113 | ||
3114 | /* Unless set, force ABI=2 for NeXT and m64, 0 otherwise. */ | |
3115 | if (!global_options_set.x_flag_objc_abi) | |
3116 | global_options.x_flag_objc_abi | |
3117 | = (!flag_next_runtime) | |
3118 | ? 0 | |
3119 | : (TARGET_64BIT ? 2 | |
3120 | : (generating_for_darwin_version >= 9) ? 1 | |
3121 | : 0); | |
3122 | ||
3123 | /* Objective-C family ABI 2 is only valid for next/m64 at present. */ | |
3124 | if (global_options_set.x_flag_objc_abi && flag_next_runtime) | |
3125 | { | |
3126 | if (TARGET_64BIT && global_options.x_flag_objc_abi < 2) | |
3127 | error_at (UNKNOWN_LOCATION, "%<-fobjc-abi-version%> >= 2 must be" | |
3128 | " used for %<-m64%> targets with" | |
3129 | " %<-fnext-runtime%>"); | |
3130 | if (!TARGET_64BIT && global_options.x_flag_objc_abi >= 2) | |
3131 | error_at (UNKNOWN_LOCATION, "%<-fobjc-abi-version%> >= 2 is not" | |
3132 | " supported on %<-m32%> targets with" | |
3133 | " %<-fnext-runtime%>"); | |
3134 | } | |
3135 | ||
024fa7dd | 3136 | /* Don't emit DWARF3/4 unless specifically selected. This is a |
3137 | workaround for tool bugs. */ | |
8e79e9d4 | 3138 | if (!global_options_set.x_dwarf_strict) |
024fa7dd | 3139 | dwarf_strict = 1; |
052166fd | 3140 | if (!global_options_set.x_dwarf_version) |
3141 | dwarf_version = 2; | |
024fa7dd | 3142 | |
9e09909d | 3143 | /* Do not allow unwind tables to be generated by default for m32. |
3144 | fnon-call-exceptions will override this, regardless of what we do. */ | |
3145 | if (generating_for_darwin_version < 10 | |
3146 | && !global_options_set.x_flag_asynchronous_unwind_tables | |
3147 | && !TARGET_64BIT) | |
3148 | global_options.x_flag_asynchronous_unwind_tables = 0; | |
3149 | ||
5886e9ab | 3150 | /* Disable -freorder-blocks-and-partition when unwind tables are being |
3151 | emitted for Darwin < 9 (OSX 10.5). | |
3152 | The strategy is, "Unless the User has specifically set/unset an unwind | |
3153 | flag we will switch off -freorder-blocks-and-partition when unwind tables | |
3154 | will be generated". If the User specifically sets flags... we assume | |
3155 | (s)he knows why... */ | |
3b3edcd4 | 3156 | if (generating_for_darwin_version < 9 |
9e09909d | 3157 | && global_options_set.x_flag_reorder_blocks_and_partition |
3158 | && ((global_options.x_flag_exceptions /* User, c++, java */ | |
3159 | && !global_options_set.x_flag_exceptions) /* User specified... */ | |
3160 | || (global_options.x_flag_unwind_tables | |
5886e9ab | 3161 | && !global_options_set.x_flag_unwind_tables) |
9e09909d | 3162 | || (global_options.x_flag_non_call_exceptions |
5886e9ab | 3163 | && !global_options_set.x_flag_non_call_exceptions) |
9e09909d | 3164 | || (global_options.x_flag_asynchronous_unwind_tables |
5886e9ab | 3165 | && !global_options_set.x_flag_asynchronous_unwind_tables))) |
3166 | { | |
3167 | inform (input_location, | |
3168 | "-freorder-blocks-and-partition does not work with exceptions " | |
3169 | "on this architecture"); | |
3170 | flag_reorder_blocks_and_partition = 0; | |
3171 | flag_reorder_blocks = 1; | |
3172 | } | |
14325167 | 3173 | |
c60ecc90 | 3174 | /* FIXME: flag_objc_sjlj_exceptions is no longer needed since there is only |
3175 | one valid choice of exception scheme for each runtime. */ | |
3176 | if (!global_options_set.x_flag_objc_sjlj_exceptions) | |
3177 | global_options.x_flag_objc_sjlj_exceptions = | |
3178 | flag_next_runtime && !TARGET_64BIT; | |
3179 | ||
3180 | /* FIXME: and this could be eliminated then too. */ | |
3181 | if (!global_options_set.x_flag_exceptions | |
3182 | && flag_objc_exceptions | |
3183 | && TARGET_64BIT) | |
3184 | flag_exceptions = 1; | |
3185 | ||
5b182752 | 3186 | if (flag_mkernel || flag_apple_kext) |
3187 | { | |
3188 | /* -mkernel implies -fapple-kext for C++ */ | |
3a4a2292 | 3189 | if (lang_GNU_CXX ()) |
5b182752 | 3190 | flag_apple_kext = 1; |
3191 | ||
3192 | flag_no_common = 1; | |
3193 | ||
3194 | /* No EH in kexts. */ | |
3195 | flag_exceptions = 0; | |
3196 | /* No -fnon-call-exceptions data in kexts. */ | |
3197 | flag_non_call_exceptions = 0; | |
8e79e9d4 | 3198 | /* so no tables either.. */ |
3199 | flag_unwind_tables = 0; | |
3200 | flag_asynchronous_unwind_tables = 0; | |
3cf7ab3b | 3201 | /* We still need to emit branch islands for kernel context. */ |
3202 | darwin_emit_branch_islands = true; | |
5b182752 | 3203 | } |
8e79e9d4 | 3204 | |
3e1cce93 | 3205 | if (flag_var_tracking_uninit == 0 |
f067760b | 3206 | && generating_for_darwin_version >= 9 |
3207 | && (flag_gtoggle ? (debug_info_level == DINFO_LEVEL_NONE) | |
3208 | : (debug_info_level >= DINFO_LEVEL_NORMAL)) | |
3209 | && write_symbols == DWARF2_DEBUG) | |
3e1cce93 | 3210 | flag_var_tracking_uninit = flag_var_tracking; |
3cf7ab3b | 3211 | |
90ff10b3 | 3212 | if (MACHO_DYNAMIC_NO_PIC_P) |
3213 | { | |
3214 | if (flag_pic) | |
b7d1dec3 | 3215 | warning_at (UNKNOWN_LOCATION, 0, |
3216 | "%<-mdynamic-no-pic%> overrides %<-fpic%>, %<-fPIC%>," | |
3217 | " %<-fpie%> or %<-fPIE%>"); | |
90ff10b3 | 3218 | flag_pic = 0; |
3219 | } | |
3220 | else if (flag_pic == 1) | |
3221 | { | |
3222 | /* Darwin's -fpic is -fPIC. */ | |
3223 | flag_pic = 2; | |
3224 | } | |
3225 | ||
3cf7ab3b | 3226 | /* It is assumed that branch island stubs are needed for earlier systems. */ |
9e09909d | 3227 | if (generating_for_darwin_version < 9) |
3cf7ab3b | 3228 | darwin_emit_branch_islands = true; |
8e79e9d4 | 3229 | else |
3230 | emit_aligned_common = true; /* Later systems can support aligned common. */ | |
d4238e8b | 3231 | |
3232 | /* The c_dialect...() macros are not available to us here. */ | |
3233 | darwin_running_cxx = (strstr (lang_hooks.name, "C++") != 0); | |
5b182752 | 3234 | } |
3235 | ||
8158aa7e | 3236 | #if DARWIN_PPC |
3237 | /* Add $LDBL128 suffix to long double builtins for ppc darwin. */ | |
6aee6ac8 | 3238 | |
3239 | static void | |
8158aa7e | 3240 | darwin_patch_builtin (enum built_in_function fncode) |
6aee6ac8 | 3241 | { |
b9a16870 | 3242 | tree fn = builtin_decl_explicit (fncode); |
6aee6ac8 | 3243 | tree sym; |
3244 | char *newname; | |
3245 | ||
3246 | if (!fn) | |
3247 | return; | |
3248 | ||
3249 | sym = DECL_ASSEMBLER_NAME (fn); | |
d243d9c9 | 3250 | newname = ACONCAT (("_", IDENTIFIER_POINTER (sym), "$LDBL128", NULL)); |
3251 | ||
6aee6ac8 | 3252 | set_user_assembler_name (fn, newname); |
6aee6ac8 | 3253 | |
b9a16870 | 3254 | fn = builtin_decl_implicit (fncode); |
6aee6ac8 | 3255 | if (fn) |
3256 | set_user_assembler_name (fn, newname); | |
6aee6ac8 | 3257 | } |
3258 | ||
3259 | void | |
3260 | darwin_patch_builtins (void) | |
3261 | { | |
3262 | if (LONG_DOUBLE_TYPE_SIZE != 128) | |
3263 | return; | |
3264 | ||
3265 | #define PATCH_BUILTIN(fncode) darwin_patch_builtin (fncode); | |
d243d9c9 | 3266 | #define PATCH_BUILTIN_NO64(fncode) \ |
3267 | if (!TARGET_64BIT) \ | |
6aee6ac8 | 3268 | darwin_patch_builtin (fncode); |
d243d9c9 | 3269 | #define PATCH_BUILTIN_VARIADIC(fncode) \ |
3270 | if (!TARGET_64BIT \ | |
6aee6ac8 | 3271 | && (strverscmp (darwin_macosx_version_min, "10.3.9") >= 0)) \ |
3272 | darwin_patch_builtin (fncode); | |
3273 | #include "darwin-ppc-ldouble-patch.def" | |
3274 | #undef PATCH_BUILTIN | |
3275 | #undef PATCH_BUILTIN_NO64 | |
3276 | #undef PATCH_BUILTIN_VARIADIC | |
3277 | } | |
8158aa7e | 3278 | #endif |
6aee6ac8 | 3279 | |
d4238e8b | 3280 | /* CFStrings implementation. */ |
3281 | static GTY(()) tree cfstring_class_reference = NULL_TREE; | |
3282 | static GTY(()) tree cfstring_type_node = NULL_TREE; | |
3283 | static GTY(()) tree ccfstring_type_node = NULL_TREE; | |
3284 | static GTY(()) tree pccfstring_type_node = NULL_TREE; | |
3285 | static GTY(()) tree pcint_type_node = NULL_TREE; | |
3286 | static GTY(()) tree pcchar_type_node = NULL_TREE; | |
3287 | ||
820c090b | 3288 | static enum built_in_function darwin_builtin_cfstring; |
d4238e8b | 3289 | |
3290 | /* Store all constructed constant CFStrings in a hash table so that | |
3291 | they get uniqued properly. */ | |
3292 | ||
2ef51f0e | 3293 | typedef struct GTY ((for_user)) cfstring_descriptor { |
d4238e8b | 3294 | /* The string literal. */ |
3295 | tree literal; | |
3296 | /* The resulting constant CFString. */ | |
3297 | tree constructor; | |
3298 | } cfstring_descriptor; | |
3299 | ||
b594087e | 3300 | struct cfstring_hasher : ggc_ptr_hash<cfstring_descriptor> |
2ef51f0e | 3301 | { |
3302 | static hashval_t hash (cfstring_descriptor *); | |
3303 | static bool equal (cfstring_descriptor *, cfstring_descriptor *); | |
3304 | }; | |
d4238e8b | 3305 | |
2ef51f0e | 3306 | static GTY (()) hash_table<cfstring_hasher> *cfstring_htab; |
d4238e8b | 3307 | |
3308 | static tree | |
3309 | add_builtin_field_decl (tree type, const char *name, tree **chain) | |
3310 | { | |
3311 | tree field = build_decl (BUILTINS_LOCATION, FIELD_DECL, | |
3312 | get_identifier (name), type); | |
3313 | ||
3314 | if (*chain != NULL) | |
3315 | **chain = field; | |
3316 | *chain = &DECL_CHAIN (field); | |
3317 | ||
3318 | return field; | |
3319 | } | |
3320 | ||
820c090b | 3321 | tree |
3322 | darwin_init_cfstring_builtins (unsigned builtin_cfstring) | |
d4238e8b | 3323 | { |
3324 | tree cfsfun, fields, pccfstring_ftype_pcchar; | |
3325 | tree *chain = NULL; | |
3326 | ||
820c090b | 3327 | darwin_builtin_cfstring = |
3328 | (enum built_in_function) builtin_cfstring; | |
d4238e8b | 3329 | |
3330 | /* struct __builtin_CFString { | |
3331 | const int *isa; (will point at | |
3332 | int flags; __CFConstantStringClassReference) | |
3333 | const char *str; | |
3334 | long length; | |
3335 | }; */ | |
3336 | ||
3337 | pcint_type_node = build_pointer_type | |
3338 | (build_qualified_type (integer_type_node, TYPE_QUAL_CONST)); | |
3339 | ||
3340 | pcchar_type_node = build_pointer_type | |
3341 | (build_qualified_type (char_type_node, TYPE_QUAL_CONST)); | |
3342 | ||
3343 | cfstring_type_node = (*lang_hooks.types.make_type) (RECORD_TYPE); | |
3344 | ||
3345 | /* Have to build backwards for finish struct. */ | |
3346 | fields = add_builtin_field_decl (long_integer_type_node, "length", &chain); | |
3347 | add_builtin_field_decl (pcchar_type_node, "str", &chain); | |
3348 | add_builtin_field_decl (integer_type_node, "flags", &chain); | |
3349 | add_builtin_field_decl (pcint_type_node, "isa", &chain); | |
3350 | finish_builtin_struct (cfstring_type_node, "__builtin_CFString", | |
3351 | fields, NULL_TREE); | |
3352 | ||
3353 | /* const struct __builtin_CFstring * | |
3354 | __builtin___CFStringMakeConstantString (const char *); */ | |
3355 | ||
3356 | ccfstring_type_node = build_qualified_type | |
3357 | (cfstring_type_node, TYPE_QUAL_CONST); | |
3358 | pccfstring_type_node = build_pointer_type (ccfstring_type_node); | |
3359 | pccfstring_ftype_pcchar = build_function_type_list | |
3360 | (pccfstring_type_node, pcchar_type_node, NULL_TREE); | |
3361 | ||
3362 | cfsfun = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, | |
3363 | get_identifier ("__builtin___CFStringMakeConstantString"), | |
3364 | pccfstring_ftype_pcchar); | |
3365 | ||
3366 | TREE_PUBLIC (cfsfun) = 1; | |
3367 | DECL_EXTERNAL (cfsfun) = 1; | |
3368 | DECL_ARTIFICIAL (cfsfun) = 1; | |
3369 | /* Make a lang-specific section - dup_lang_specific_decl makes a new node | |
3370 | in place of the existing, which may be NULL. */ | |
3371 | DECL_LANG_SPECIFIC (cfsfun) = NULL; | |
3372 | (*lang_hooks.dup_lang_specific_decl) (cfsfun); | |
3373 | DECL_BUILT_IN_CLASS (cfsfun) = BUILT_IN_MD; | |
820c090b | 3374 | DECL_FUNCTION_CODE (cfsfun) = darwin_builtin_cfstring; |
d4238e8b | 3375 | lang_hooks.builtin_function (cfsfun); |
3376 | ||
3377 | /* extern int __CFConstantStringClassReference[]; */ | |
3378 | cfstring_class_reference = build_decl (BUILTINS_LOCATION, VAR_DECL, | |
3379 | get_identifier ("__CFConstantStringClassReference"), | |
3380 | build_array_type (integer_type_node, NULL_TREE)); | |
3381 | ||
3382 | TREE_PUBLIC (cfstring_class_reference) = 1; | |
3383 | DECL_ARTIFICIAL (cfstring_class_reference) = 1; | |
3384 | (*lang_hooks.decls.pushdecl) (cfstring_class_reference); | |
3385 | DECL_EXTERNAL (cfstring_class_reference) = 1; | |
3386 | rest_of_decl_compilation (cfstring_class_reference, 0, 0); | |
3387 | ||
3388 | /* Initialize the hash table used to hold the constant CFString objects. */ | |
2ef51f0e | 3389 | cfstring_htab = hash_table<cfstring_hasher>::create_ggc (31); |
820c090b | 3390 | |
3391 | return cfstring_type_node; | |
d4238e8b | 3392 | } |
3393 | ||
3394 | tree | |
3395 | darwin_fold_builtin (tree fndecl, int n_args, tree *argp, | |
3396 | bool ARG_UNUSED (ignore)) | |
3397 | { | |
3398 | unsigned int fcode = DECL_FUNCTION_CODE (fndecl); | |
3399 | ||
820c090b | 3400 | if (fcode == darwin_builtin_cfstring) |
d4238e8b | 3401 | { |
3402 | if (!darwin_constant_cfstrings) | |
3403 | { | |
3404 | error ("built-in function %qD requires the" | |
3405 | " %<-mconstant-cfstrings%> flag", fndecl); | |
3406 | return error_mark_node; | |
3407 | } | |
3408 | ||
3409 | if (n_args != 1) | |
3410 | { | |
3411 | error ("built-in function %qD takes one argument only", fndecl); | |
3412 | return error_mark_node; | |
3413 | } | |
3414 | ||
3415 | return darwin_build_constant_cfstring (*argp); | |
3416 | } | |
3417 | ||
3418 | return NULL_TREE; | |
3419 | } | |
3420 | ||
f6829196 | 3421 | void |
3422 | darwin_rename_builtins (void) | |
3423 | { | |
3424 | /* The system ___divdc3 routine in libSystem on darwin10 is not | |
3425 | accurate to 1ulp, ours is, so we avoid ever using the system name | |
3426 | for this routine and instead install a non-conflicting name that | |
3427 | is accurate. | |
3428 | ||
3429 | When -ffast-math or -funsafe-math-optimizations is given, we can | |
3430 | use the faster version. */ | |
3431 | if (!flag_unsafe_math_optimizations) | |
3432 | { | |
b9a16870 | 3433 | enum built_in_function dcode |
3434 | = (enum built_in_function)(BUILT_IN_COMPLEX_DIV_MIN | |
3435 | + DCmode - MIN_MODE_COMPLEX_FLOAT); | |
3436 | tree fn = builtin_decl_explicit (dcode); | |
f6829196 | 3437 | /* Fortran and c call TARGET_INIT_BUILTINS and |
3438 | TARGET_INIT_LIBFUNCS at different times, so we have to put a | |
3439 | call into each to ensure that at least one of them is called | |
3440 | after build_common_builtin_nodes. A better fix is to add a | |
3441 | new hook to run after build_common_builtin_nodes runs. */ | |
3442 | if (fn) | |
3443 | set_user_assembler_name (fn, "___ieee_divdc3"); | |
b9a16870 | 3444 | fn = builtin_decl_implicit (dcode); |
f6829196 | 3445 | if (fn) |
3446 | set_user_assembler_name (fn, "___ieee_divdc3"); | |
3447 | } | |
3448 | } | |
3449 | ||
30f690e0 | 3450 | bool |
3451 | darwin_libc_has_function (enum function_class fn_class) | |
3452 | { | |
3453 | if (fn_class == function_sincos) | |
3454 | return false; | |
3455 | if (fn_class == function_c99_math_complex | |
3456 | || fn_class == function_c99_misc) | |
3457 | return (TARGET_64BIT | |
3458 | || strverscmp (darwin_macosx_version_min, "10.3") >= 0); | |
3459 | ||
3460 | return true; | |
3461 | } | |
3462 | ||
2ef51f0e | 3463 | hashval_t |
3464 | cfstring_hasher::hash (cfstring_descriptor *ptr) | |
d4238e8b | 3465 | { |
2ef51f0e | 3466 | tree str = ptr->literal; |
d4238e8b | 3467 | const unsigned char *p = (const unsigned char *) TREE_STRING_POINTER (str); |
3468 | int i, len = TREE_STRING_LENGTH (str); | |
3469 | hashval_t h = len; | |
3470 | ||
3471 | for (i = 0; i < len; i++) | |
3472 | h = ((h * 613) + p[i]); | |
3473 | ||
3474 | return h; | |
3475 | } | |
3476 | ||
2ef51f0e | 3477 | bool |
3478 | cfstring_hasher::equal (cfstring_descriptor *ptr1, cfstring_descriptor *ptr2) | |
d4238e8b | 3479 | { |
2ef51f0e | 3480 | tree str1 = ptr1->literal; |
3481 | tree str2 = ptr2->literal; | |
d4238e8b | 3482 | int len1 = TREE_STRING_LENGTH (str1); |
3483 | ||
3484 | return (len1 == TREE_STRING_LENGTH (str2) | |
3485 | && !memcmp (TREE_STRING_POINTER (str1), TREE_STRING_POINTER (str2), | |
3486 | len1)); | |
3487 | } | |
3488 | ||
3489 | tree | |
3490 | darwin_build_constant_cfstring (tree str) | |
3491 | { | |
3492 | struct cfstring_descriptor *desc, key; | |
d4238e8b | 3493 | tree addr; |
3494 | ||
3495 | if (!str) | |
3496 | { | |
3497 | error ("CFString literal is missing"); | |
3498 | return error_mark_node; | |
3499 | } | |
3500 | ||
3501 | STRIP_NOPS (str); | |
3502 | ||
3503 | if (TREE_CODE (str) == ADDR_EXPR) | |
3504 | str = TREE_OPERAND (str, 0); | |
3505 | ||
3506 | if (TREE_CODE (str) != STRING_CST) | |
3507 | { | |
3508 | error ("CFString literal expression is not a string constant"); | |
3509 | return error_mark_node; | |
3510 | } | |
3511 | ||
3512 | /* Perhaps we already constructed a constant CFString just like this one? */ | |
3513 | key.literal = str; | |
2ef51f0e | 3514 | cfstring_descriptor **loc = cfstring_htab->find_slot (&key, INSERT); |
3515 | desc = *loc; | |
d4238e8b | 3516 | |
3517 | if (!desc) | |
3518 | { | |
3519 | tree var, constructor, field; | |
f1f41a6c | 3520 | vec<constructor_elt, va_gc> *v = NULL; |
d4238e8b | 3521 | int length = TREE_STRING_LENGTH (str) - 1; |
3522 | ||
3523 | if (darwin_warn_nonportable_cfstrings) | |
3524 | { | |
3525 | const char *s = TREE_STRING_POINTER (str); | |
3526 | int l = 0; | |
3527 | ||
3528 | for (l = 0; l < length; l++) | |
3529 | if (!s[l] || !isascii (s[l])) | |
3530 | { | |
3531 | warning (darwin_warn_nonportable_cfstrings, "%s in CFString literal", | |
3532 | s[l] ? "non-ASCII character" : "embedded NUL"); | |
3533 | break; | |
3534 | } | |
3535 | } | |
3536 | ||
25a27413 | 3537 | *loc = desc = ggc_cleared_alloc<cfstring_descriptor> (); |
d4238e8b | 3538 | desc->literal = str; |
3539 | ||
3540 | /* isa *. */ | |
3541 | field = TYPE_FIELDS (ccfstring_type_node); | |
3542 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, | |
3543 | build1 (ADDR_EXPR, TREE_TYPE (field), | |
3544 | cfstring_class_reference)); | |
3545 | /* flags */ | |
3546 | field = DECL_CHAIN (field); | |
3547 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, | |
3548 | build_int_cst (TREE_TYPE (field), 0x000007c8)); | |
3549 | /* string *. */ | |
3550 | field = DECL_CHAIN (field); | |
3551 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, | |
3552 | build1 (ADDR_EXPR, TREE_TYPE (field), str)); | |
3553 | /* length */ | |
3554 | field = DECL_CHAIN (field); | |
3555 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, | |
3556 | build_int_cst (TREE_TYPE (field), length)); | |
3557 | ||
3558 | constructor = build_constructor (ccfstring_type_node, v); | |
3559 | TREE_READONLY (constructor) = 1; | |
3560 | TREE_CONSTANT (constructor) = 1; | |
3561 | TREE_STATIC (constructor) = 1; | |
3562 | ||
3563 | /* Fromage: The C++ flavor of 'build_unary_op' expects constructor nodes | |
3564 | to have the TREE_HAS_CONSTRUCTOR (...) bit set. However, this file is | |
3565 | being built without any knowledge of C++ tree accessors; hence, we shall | |
3566 | use the generic accessor that TREE_HAS_CONSTRUCTOR actually maps to! */ | |
3567 | if (darwin_running_cxx) | |
3568 | TREE_LANG_FLAG_4 (constructor) = 1; /* TREE_HAS_CONSTRUCTOR */ | |
3569 | ||
3570 | /* Create an anonymous global variable for this CFString. */ | |
3571 | var = build_decl (input_location, CONST_DECL, | |
3572 | NULL, TREE_TYPE (constructor)); | |
3573 | DECL_ARTIFICIAL (var) = 1; | |
3574 | TREE_STATIC (var) = 1; | |
3575 | DECL_INITIAL (var) = constructor; | |
3576 | /* FIXME: This should use a translation_unit_decl to indicate file scope. */ | |
3577 | DECL_CONTEXT (var) = NULL_TREE; | |
3578 | desc->constructor = var; | |
3579 | } | |
3580 | ||
3581 | addr = build1 (ADDR_EXPR, pccfstring_type_node, desc->constructor); | |
3582 | TREE_CONSTANT (addr) = 1; | |
3583 | ||
3584 | return addr; | |
3585 | } | |
3586 | ||
3587 | bool | |
3588 | darwin_cfstring_p (tree str) | |
3589 | { | |
3590 | struct cfstring_descriptor key; | |
d4238e8b | 3591 | |
3592 | if (!str) | |
3593 | return false; | |
3594 | ||
3595 | STRIP_NOPS (str); | |
3596 | ||
3597 | if (TREE_CODE (str) == ADDR_EXPR) | |
3598 | str = TREE_OPERAND (str, 0); | |
3599 | ||
3600 | if (TREE_CODE (str) != STRING_CST) | |
3601 | return false; | |
3602 | ||
3603 | key.literal = str; | |
2ef51f0e | 3604 | cfstring_descriptor **loc = cfstring_htab->find_slot (&key, NO_INSERT); |
d4238e8b | 3605 | |
3606 | if (loc) | |
3607 | return true; | |
3608 | ||
3609 | return false; | |
3610 | } | |
3611 | ||
3612 | void | |
3613 | darwin_enter_string_into_cfstring_table (tree str) | |
3614 | { | |
3615 | struct cfstring_descriptor key; | |
d4238e8b | 3616 | |
3617 | key.literal = str; | |
2ef51f0e | 3618 | cfstring_descriptor **loc = cfstring_htab->find_slot (&key, INSERT); |
d4238e8b | 3619 | |
3620 | if (!*loc) | |
3621 | { | |
25a27413 | 3622 | *loc = ggc_cleared_alloc<cfstring_descriptor> (); |
d4238e8b | 3623 | ((struct cfstring_descriptor *)*loc)->literal = str; |
3624 | } | |
3625 | } | |
6aee6ac8 | 3626 | |
3b73548b | 3627 | /* Choose named function section based on its frequency. */ |
3628 | ||
3629 | section * | |
3630 | darwin_function_section (tree decl, enum node_frequency freq, | |
3631 | bool startup, bool exit) | |
3632 | { | |
9e09909d | 3633 | /* Decide if we need to put this in a coalescable section. */ |
f199808c | 3634 | bool weak = (decl |
9e09909d | 3635 | && DECL_WEAK (decl) |
3636 | && (!DECL_ATTRIBUTES (decl) | |
3637 | || !lookup_attribute ("weak_import", | |
3638 | DECL_ATTRIBUTES (decl)))); | |
3639 | ||
f199808c | 3640 | bool use_coal = weak && ld_uses_coal_sects; |
9e09909d | 3641 | /* If there is a specified section name, we should not be trying to |
3642 | override. */ | |
738a6bda | 3643 | if (decl && DECL_SECTION_NAME (decl) != NULL) |
9e09909d | 3644 | return get_named_section (decl, NULL, 0); |
3645 | ||
0fbd1542 | 3646 | /* We always put unlikely executed stuff in the cold section. */ |
3647 | if (freq == NODE_FREQUENCY_UNLIKELY_EXECUTED) | |
f199808c | 3648 | return (use_coal) ? darwin_sections[text_cold_coal_section] |
3649 | : darwin_sections[text_cold_section]; | |
0fbd1542 | 3650 | |
3651 | /* If we have LTO *and* feedback information, then let LTO handle | |
3652 | the function ordering, it makes a better job (for normal, hot, | |
3653 | startup and exit - hence the bailout for cold above). */ | |
3654 | if (in_lto_p && flag_profile_values) | |
3655 | goto default_function_sections; | |
3656 | ||
3657 | /* Non-cold startup code should go to startup subsection. */ | |
3658 | if (startup) | |
f199808c | 3659 | return (use_coal) ? darwin_sections[text_startup_coal_section] |
3660 | : darwin_sections[text_startup_section]; | |
3b73548b | 3661 | |
3662 | /* Similarly for exit. */ | |
0fbd1542 | 3663 | if (exit) |
f199808c | 3664 | return (use_coal) ? darwin_sections[text_exit_coal_section] |
3665 | : darwin_sections[text_exit_section]; | |
0fbd1542 | 3666 | |
3667 | /* Place hot code. */ | |
3668 | if (freq == NODE_FREQUENCY_HOT) | |
f199808c | 3669 | return (use_coal) ? darwin_sections[text_hot_coal_section] |
3670 | : darwin_sections[text_hot_section]; | |
0fbd1542 | 3671 | |
3672 | /* Otherwise, default to the 'normal' non-reordered sections. */ | |
3673 | default_function_sections: | |
f199808c | 3674 | return (use_coal) ? darwin_sections[text_coal_section] |
3675 | : text_section; | |
3b73548b | 3676 | } |
3677 | ||
3b3edcd4 | 3678 | /* When a function is partitioned between sections, we need to insert a label |
3679 | at the start of each new chunk - so that it may become a valid 'atom' for | |
3680 | eh and debug purposes. Without this the linker will emit warnings if one | |
3681 | tries to add line location information (since the switched fragment will | |
3682 | be anonymous). */ | |
3683 | ||
3684 | void | |
3685 | darwin_function_switched_text_sections (FILE *fp, tree decl, bool new_is_cold) | |
3686 | { | |
3b3edcd4 | 3687 | /* Make sure we pick up all the relevant quotes etc. */ |
754af4eb | 3688 | assemble_name_raw (fp, new_is_cold ? "__cold_sect_of_" : "__hot_sect_of_"); |
29c7bda6 | 3689 | assemble_name_raw (fp, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl))); |
3b3edcd4 | 3690 | fputs (":\n", fp); |
3691 | } | |
3692 | ||
1f3233d1 | 3693 | #include "gt-darwin.h" |