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80d725d7 | 1 | /* Functions for generic Darwin as target machine for GNU C compiler. |
8e8f6434 | 2 | Copyright (C) 1989-2018 Free Software Foundation, Inc. |
80d725d7 | 3 | Contributed by Apple Computer Inc. |
4 | ||
187b36cf | 5 | This file is part of GCC. |
80d725d7 | 6 | |
187b36cf | 7 | GCC is free software; you can redistribute it and/or modify |
80d725d7 | 8 | it under the terms of the GNU General Public License as published by |
038d1e19 | 9 | the Free Software Foundation; either version 3, or (at your option) |
80d725d7 | 10 | any later version. |
11 | ||
187b36cf | 12 | GCC is distributed in the hope that it will be useful, |
80d725d7 | 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
038d1e19 | 18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
80d725d7 | 20 | |
785790dc | 21 | #define IN_TARGET_CODE 1 |
22 | ||
80d725d7 | 23 | #include "config.h" |
24 | #include "system.h" | |
805e22b2 | 25 | #include "coretypes.h" |
9ef16211 | 26 | #include "backend.h" |
c1eb80de | 27 | #include "target.h" |
28 | #include "rtl.h" | |
9ef16211 | 29 | #include "tree.h" |
30 | #include "gimple.h" | |
c1eb80de | 31 | #include "cfghooks.h" |
9ef16211 | 32 | #include "df.h" |
ad7b10a2 | 33 | #include "memmodel.h" |
c1eb80de | 34 | #include "tm_p.h" |
35 | #include "stringpool.h" | |
30a86690 | 36 | #include "attribs.h" |
80d725d7 | 37 | #include "insn-config.h" |
c1eb80de | 38 | #include "emit-rtl.h" |
39 | #include "cgraph.h" | |
40 | #include "lto-streamer.h" | |
80d725d7 | 41 | #include "output.h" |
9ed99284 | 42 | #include "varasm.h" |
43 | #include "stor-layout.h" | |
d53441c8 | 44 | #include "explow.h" |
80d725d7 | 45 | #include "expr.h" |
d19bd1f0 | 46 | #include "langhooks.h" |
690abe5d | 47 | #include "toplev.h" |
47131315 | 48 | #include "lto-section-names.h" |
80d725d7 | 49 | |
f0ed0e8a | 50 | /* Darwin supports a feature called fix-and-continue, which is used |
51 | for rapid turn around debugging. When code is compiled with the | |
52 | -mfix-and-continue flag, two changes are made to the generated code | |
53 | that allow the system to do things that it would normally not be | |
54 | able to do easily. These changes allow gdb to load in | |
55 | recompilation of a translation unit that has been changed into a | |
56 | running program and replace existing functions and methods of that | |
cb4213cd | 57 | translation unit with versions of those functions and methods |
f0ed0e8a | 58 | from the newly compiled translation unit. The new functions access |
d188633a | 59 | the existing static symbols from the old translation unit, if the |
60 | symbol existed in the unit to be replaced, and from the new | |
61 | translation unit, otherwise. | |
f0ed0e8a | 62 | |
8063e558 | 63 | The changes are to insert 5 nops at the beginning of all functions |
d188633a | 64 | and to use indirection to get at static symbols. The 5 nops |
f0ed0e8a | 65 | are required by consumers of the generated code. Currently, gdb |
66 | uses this to patch in a jump to the overriding function, this | |
67 | allows all uses of the old name to forward to the replacement, | |
84cbcde5 | 68 | including existing function pointers and virtual methods. See |
f0ed0e8a | 69 | rs6000_emit_prologue for the code that handles the nop insertions. |
b215c058 | 70 | |
f0ed0e8a | 71 | The added indirection allows gdb to redirect accesses to static |
d188633a | 72 | symbols from the newly loaded translation unit to the existing |
73 | symbol, if any. @code{static} symbols are special and are handled by | |
74 | setting the second word in the .non_lazy_symbol_pointer data | |
75 | structure to symbol. See indirect_data for the code that handles | |
76 | the extra indirection, and machopic_output_indirection and its use | |
77 | of MACHO_SYMBOL_STATIC for the code that handles @code{static} | |
78 | symbol indirection. */ | |
f0ed0e8a | 79 | |
3cf7ab3b | 80 | /* For darwin >= 9 (OSX 10.5) the linker is capable of making the necessary |
81 | branch islands and we no longer need to emit darwin stubs. | |
82 | However, if we are generating code for earlier systems (or for use in the | |
83 | kernel) the stubs might still be required, and this will be set true. */ | |
84 | int darwin_emit_branch_islands = false; | |
85 | ||
ed161dab | 86 | typedef struct GTY(()) cdtor_record { |
4b313269 | 87 | rtx symbol; |
ed161dab | 88 | int priority; /* [con/de]structor priority */ |
4b313269 | 89 | int position; /* original position */ |
ed161dab | 90 | } cdtor_record; |
4b313269 | 91 | |
ed161dab | 92 | static GTY(()) vec<cdtor_record, va_gc> *ctors = NULL; |
93 | static GTY(()) vec<cdtor_record, va_gc> *dtors = NULL; | |
4b313269 | 94 | |
d4238e8b | 95 | /* A flag to determine whether we are running c++ or obj-c++. This has to be |
96 | settable from non-c-family contexts too (i.e. we can't use the c_dialect_ | |
97 | functions). */ | |
98 | int darwin_running_cxx; | |
99 | ||
9e09909d | 100 | /* Some code-gen now depends on OS major version numbers (at least). */ |
101 | int generating_for_darwin_version ; | |
102 | ||
f199808c | 103 | /* For older linkers we need to emit special sections (marked 'coalesced') for |
104 | for weak or single-definition items. */ | |
105 | static bool ld_uses_coal_sects = false; | |
106 | ||
92e4ba7d | 107 | /* Section names. */ |
108 | section * darwin_sections[NUM_DARWIN_SECTIONS]; | |
2f14b1f9 | 109 | |
90ff10b3 | 110 | /* While we transition to using in-tests instead of ifdef'd code. */ |
6cc3d6ec | 111 | #if !HAVE_lo_sum |
90ff10b3 | 112 | #define gen_macho_high(a,b) (a) |
113 | #define gen_macho_low(a,b,c) (a) | |
114 | #endif | |
115 | ||
f720b7c6 | 116 | /* True if we're setting __attribute__ ((ms_struct)). */ |
117 | int darwin_ms_struct = false; | |
118 | ||
8e79e9d4 | 119 | /* Earlier versions of Darwin as do not recognize an alignment field in |
120 | .comm directives, this should be set for versions that allow it. */ | |
121 | int emit_aligned_common = false; | |
122 | ||
2f14b1f9 | 123 | /* A get_unnamed_section callback used to switch to an ObjC section. |
124 | DIRECTIVE is as for output_section_asm_op. */ | |
125 | ||
126 | static void | |
127 | output_objc_section_asm_op (const void *directive) | |
128 | { | |
92e4ba7d | 129 | static bool been_here = false; |
2f14b1f9 | 130 | |
163c9fff | 131 | /* The NeXT ObjC Runtime requires these sections to be present and in |
132 | order in the object. The code below implements this by emitting | |
133 | a section header for each ObjC section the first time that an ObjC | |
134 | section is requested. */ | |
92e4ba7d | 135 | if (! been_here) |
2f14b1f9 | 136 | { |
c4796e8b | 137 | section *saved_in_section = in_section; |
b215c058 | 138 | static const enum darwin_section_enum tomark[] = |
92e4ba7d | 139 | { |
140 | /* written, cold -> hot */ | |
141 | objc_cat_cls_meth_section, | |
142 | objc_cat_inst_meth_section, | |
143 | objc_string_object_section, | |
144 | objc_constant_string_object_section, | |
145 | objc_selector_refs_section, | |
146 | objc_selector_fixup_section, | |
147 | objc_cls_refs_section, | |
148 | objc_class_section, | |
149 | objc_meta_class_section, | |
150 | /* shared, hot -> cold */ | |
151 | objc_cls_meth_section, | |
152 | objc_inst_meth_section, | |
153 | objc_protocol_section, | |
154 | objc_class_names_section, | |
155 | objc_meth_var_types_section, | |
156 | objc_meth_var_names_section, | |
157 | objc_category_section, | |
158 | objc_class_vars_section, | |
159 | objc_instance_vars_section, | |
160 | objc_module_info_section, | |
267785bc | 161 | objc_symbols_section, |
92e4ba7d | 162 | }; |
267785bc | 163 | /* ABI=1 */ |
164 | static const enum darwin_section_enum tomarkv1[] = | |
165 | { | |
166 | objc1_protocol_ext_section, | |
167 | objc1_class_ext_section, | |
168 | objc1_prop_list_section | |
169 | } ; | |
170 | /* ABI=2 */ | |
171 | static const enum darwin_section_enum tomarkv2[] = | |
172 | { | |
173 | objc2_message_refs_section, | |
174 | objc2_classdefs_section, | |
175 | objc2_metadata_section, | |
176 | objc2_classrefs_section, | |
177 | objc2_classlist_section, | |
178 | objc2_categorylist_section, | |
179 | objc2_selector_refs_section, | |
180 | objc2_nonlazy_class_section, | |
181 | objc2_nonlazy_category_section, | |
182 | objc2_protocollist_section, | |
183 | objc2_protocolrefs_section, | |
184 | objc2_super_classrefs_section, | |
185 | objc2_image_info_section, | |
186 | objc2_constant_string_object_section | |
187 | } ; | |
92e4ba7d | 188 | size_t i; |
b215c058 | 189 | |
92e4ba7d | 190 | been_here = true; |
267785bc | 191 | if (flag_objc_abi < 2) |
192 | { | |
193 | for (i = 0; i < ARRAY_SIZE (tomark); i++) | |
194 | switch_to_section (darwin_sections[tomark[i]]); | |
195 | if (flag_objc_abi == 1) | |
196 | for (i = 0; i < ARRAY_SIZE (tomarkv1); i++) | |
197 | switch_to_section (darwin_sections[tomarkv1[i]]); | |
198 | } | |
199 | else | |
200 | for (i = 0; i < ARRAY_SIZE (tomarkv2); i++) | |
201 | switch_to_section (darwin_sections[tomarkv2[i]]); | |
202 | /* Make sure we don't get varasm.c out of sync with us. */ | |
c4796e8b | 203 | switch_to_section (saved_in_section); |
2f14b1f9 | 204 | } |
205 | output_section_asm_op (directive); | |
206 | } | |
207 | ||
61aeb501 | 208 | |
209 | /* Private flag applied to disable section-anchors in a particular section. */ | |
210 | #define SECTION_NO_ANCHOR SECTION_MACH_DEP | |
211 | ||
212 | ||
2f14b1f9 | 213 | /* Implement TARGET_ASM_INIT_SECTIONS. */ |
214 | ||
215 | void | |
216 | darwin_init_sections (void) | |
217 | { | |
92e4ba7d | 218 | #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) \ |
219 | darwin_sections[NAME] = \ | |
220 | get_unnamed_section (FLAGS, (OBJC \ | |
221 | ? output_objc_section_asm_op \ | |
222 | : output_section_asm_op), \ | |
223 | "\t" DIRECTIVE); | |
224 | #include "config/darwin-sections.def" | |
2f14b1f9 | 225 | #undef DEF_SECTION |
226 | ||
92e4ba7d | 227 | readonly_data_section = darwin_sections[const_section]; |
228 | exception_section = darwin_sections[darwin_exception_section]; | |
229 | eh_frame_section = darwin_sections[darwin_eh_frame_section]; | |
f199808c | 230 | |
231 | /* If our linker is new enough to coalesce weak symbols, then we | |
232 | can just put picbase_thunks into the text section. */ | |
233 | if (! ld_uses_coal_sects ) | |
234 | darwin_sections[picbase_thunk_section] = text_section; | |
2f14b1f9 | 235 | } |
f0ed0e8a | 236 | |
80d725d7 | 237 | int |
b40da9a7 | 238 | name_needs_quotes (const char *name) |
80d725d7 | 239 | { |
240 | int c; | |
241 | while ((c = *name++) != '\0') | |
163c9fff | 242 | if (! ISIDNUM (c) |
243 | && c != '.' && c != '$' && c != '_' ) | |
80d725d7 | 244 | return 1; |
245 | return 0; | |
246 | } | |
247 | ||
866318b4 | 248 | /* Return true if SYM_REF can be used without an indirection. */ |
90ff10b3 | 249 | int |
ab06d2ff | 250 | machopic_symbol_defined_p (rtx sym_ref) |
80d725d7 | 251 | { |
866318b4 | 252 | if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_DEFINED) |
253 | return true; | |
254 | ||
255 | /* If a symbol references local and is not an extern to this | |
256 | file, then the symbol might be able to declared as defined. */ | |
257 | if (SYMBOL_REF_LOCAL_P (sym_ref) && ! SYMBOL_REF_EXTERNAL_P (sym_ref)) | |
258 | { | |
259 | /* If the symbol references a variable and the variable is a | |
260 | common symbol, then this symbol is not defined. */ | |
261 | if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_VARIABLE) | |
262 | { | |
263 | tree decl = SYMBOL_REF_DECL (sym_ref); | |
264 | if (!decl) | |
265 | return true; | |
266 | if (DECL_COMMON (decl)) | |
267 | return false; | |
268 | } | |
269 | return true; | |
270 | } | |
271 | return false; | |
80d725d7 | 272 | } |
273 | ||
ab06d2ff | 274 | /* This module assumes that (const (symbol_ref "foo")) is a legal pic |
275 | reference, which will not be changed. */ | |
b40da9a7 | 276 | |
80d725d7 | 277 | enum machopic_addr_class |
ab06d2ff | 278 | machopic_classify_symbol (rtx sym_ref) |
80d725d7 | 279 | { |
ab06d2ff | 280 | bool function_p; |
281 | ||
ab06d2ff | 282 | function_p = SYMBOL_REF_FUNCTION_P (sym_ref); |
283 | if (machopic_symbol_defined_p (sym_ref)) | |
b215c058 | 284 | return (function_p |
ab06d2ff | 285 | ? MACHOPIC_DEFINED_FUNCTION : MACHOPIC_DEFINED_DATA); |
286 | else | |
b215c058 | 287 | return (function_p |
ab06d2ff | 288 | ? MACHOPIC_UNDEFINED_FUNCTION : MACHOPIC_UNDEFINED_DATA); |
80d725d7 | 289 | } |
290 | ||
f0ed0e8a | 291 | #ifndef TARGET_FIX_AND_CONTINUE |
292 | #define TARGET_FIX_AND_CONTINUE 0 | |
293 | #endif | |
294 | ||
295 | /* Indicate when fix-and-continue style code generation is being used | |
296 | and when a reference to data should be indirected so that it can be | |
0975351b | 297 | rebound in a new translation unit to reference the original instance |
f0ed0e8a | 298 | of that data. Symbol names that are for code generation local to |
299 | the translation unit are bound to the new translation unit; | |
300 | currently this means symbols that begin with L or _OBJC_; | |
301 | otherwise, we indicate that an indirect reference should be made to | |
302 | permit the runtime to rebind new instances of the translation unit | |
303 | to the original instance of the data. */ | |
304 | ||
305 | static int | |
306 | indirect_data (rtx sym_ref) | |
307 | { | |
308 | int lprefix; | |
309 | const char *name; | |
310 | ||
c4f8e01f | 311 | /* If we aren't generating fix-and-continue code, don't do anything |
312 | special. */ | |
f0ed0e8a | 313 | if (TARGET_FIX_AND_CONTINUE == 0) |
314 | return 0; | |
315 | ||
316 | /* Otherwise, all symbol except symbols that begin with L or _OBJC_ | |
317 | are indirected. Symbols that begin with L and _OBJC_ are always | |
318 | bound to the current translation unit as they are used for | |
319 | generated local data of the translation unit. */ | |
320 | ||
321 | name = XSTR (sym_ref, 0); | |
322 | ||
323 | lprefix = (((name[0] == '*' || name[0] == '&') | |
324 | && (name[1] == 'L' || (name[1] == '"' && name[2] == 'L'))) | |
78a79402 | 325 | || (strncmp (name, "_OBJC_", 6) == 0)); |
f0ed0e8a | 326 | |
327 | return ! lprefix; | |
328 | } | |
329 | ||
80d725d7 | 330 | static int |
ab06d2ff | 331 | machopic_data_defined_p (rtx sym_ref) |
80d725d7 | 332 | { |
f0ed0e8a | 333 | if (indirect_data (sym_ref)) |
334 | return 0; | |
335 | ||
ab06d2ff | 336 | switch (machopic_classify_symbol (sym_ref)) |
80d725d7 | 337 | { |
338 | case MACHOPIC_DEFINED_DATA: | |
3a7ccce8 | 339 | case MACHOPIC_DEFINED_FUNCTION: |
80d725d7 | 340 | return 1; |
341 | default: | |
342 | return 0; | |
343 | } | |
344 | } | |
345 | ||
80d725d7 | 346 | void |
ab06d2ff | 347 | machopic_define_symbol (rtx mem) |
80d725d7 | 348 | { |
ab06d2ff | 349 | rtx sym_ref; |
b215c058 | 350 | |
27d2baef | 351 | gcc_assert (GET_CODE (mem) == MEM); |
ab06d2ff | 352 | sym_ref = XEXP (mem, 0); |
353 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; | |
80d725d7 | 354 | } |
355 | ||
a914e728 | 356 | /* Return either ORIG or: |
80d725d7 | 357 | |
a914e728 | 358 | (const:P (unspec:P [ORIG] UNSPEC_MACHOPIC_OFFSET)) |
ab06d2ff | 359 | |
a914e728 | 360 | depending on MACHO_DYNAMIC_NO_PIC_P. */ |
ab06d2ff | 361 | rtx |
a914e728 | 362 | machopic_gen_offset (rtx orig) |
ab06d2ff | 363 | { |
a914e728 | 364 | if (MACHO_DYNAMIC_NO_PIC_P) |
b06a3cc3 | 365 | return orig; |
366 | else | |
a914e728 | 367 | { |
368 | /* Play games to avoid marking the function as needing pic if we | |
369 | are being called as part of the cost-estimation process. */ | |
e5d1687d | 370 | if (current_ir_type () != IR_GIMPLE || currently_expanding_to_rtl) |
a914e728 | 371 | crtl->uses_pic_offset_table = 1; |
372 | orig = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, orig), | |
373 | UNSPEC_MACHOPIC_OFFSET); | |
374 | return gen_rtx_CONST (Pmode, orig); | |
375 | } | |
b06a3cc3 | 376 | } |
377 | ||
b186bdc9 | 378 | static GTY(()) const char * function_base_func_name; |
379 | static GTY(()) int current_pic_label_num; | |
f212a7d0 | 380 | static GTY(()) int emitted_pic_label_num; |
b186bdc9 | 381 | |
f212a7d0 | 382 | static void |
383 | update_pic_label_number_if_needed (void) | |
b186bdc9 | 384 | { |
385 | const char *current_name; | |
386 | ||
90ff10b3 | 387 | /* When we are generating _get_pc thunks within stubs, there is no current |
388 | function. */ | |
389 | if (current_function_decl) | |
390 | { | |
391 | current_name = | |
392 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl)); | |
393 | if (function_base_func_name != current_name) | |
394 | { | |
395 | ++current_pic_label_num; | |
396 | function_base_func_name = current_name; | |
397 | } | |
398 | } | |
399 | else | |
80d725d7 | 400 | { |
80d725d7 | 401 | ++current_pic_label_num; |
90ff10b3 | 402 | function_base_func_name = "L_machopic_stub_dummy"; |
80d725d7 | 403 | } |
f212a7d0 | 404 | } |
405 | ||
406 | void | |
407 | machopic_output_function_base_name (FILE *file) | |
408 | { | |
409 | /* If dynamic-no-pic is on, we should not get here. */ | |
410 | gcc_assert (!MACHO_DYNAMIC_NO_PIC_P); | |
411 | ||
412 | update_pic_label_number_if_needed (); | |
413 | fprintf (file, "L%d$pb", current_pic_label_num); | |
414 | } | |
415 | ||
4e2e3c2e | 416 | char curr_picbasename[32]; |
417 | ||
418 | const char * | |
419 | machopic_get_function_picbase (void) | |
420 | { | |
421 | /* If dynamic-no-pic is on, we should not get here. */ | |
422 | gcc_assert (!MACHO_DYNAMIC_NO_PIC_P); | |
423 | ||
424 | update_pic_label_number_if_needed (); | |
425 | snprintf (curr_picbasename, 32, "L%d$pb", current_pic_label_num); | |
426 | return (const char *) curr_picbasename; | |
427 | } | |
428 | ||
f212a7d0 | 429 | bool |
430 | machopic_should_output_picbase_label (void) | |
431 | { | |
432 | update_pic_label_number_if_needed (); | |
433 | ||
434 | if (current_pic_label_num == emitted_pic_label_num) | |
435 | return false; | |
436 | ||
437 | emitted_pic_label_num = current_pic_label_num; | |
438 | return true; | |
80d725d7 | 439 | } |
440 | ||
ab06d2ff | 441 | /* The suffix attached to non-lazy pointer symbols. */ |
442 | #define NON_LAZY_POINTER_SUFFIX "$non_lazy_ptr" | |
443 | /* The suffix attached to stub symbols. */ | |
444 | #define STUB_SUFFIX "$stub" | |
80d725d7 | 445 | |
2ef51f0e | 446 | typedef struct GTY ((for_user)) machopic_indirection |
80d725d7 | 447 | { |
ab06d2ff | 448 | /* The SYMBOL_REF for the entity referenced. */ |
449 | rtx symbol; | |
6d3abfc0 | 450 | /* The name of the stub or non-lazy pointer. */ |
451 | const char * ptr_name; | |
ab06d2ff | 452 | /* True iff this entry is for a stub (as opposed to a non-lazy |
453 | pointer). */ | |
454 | bool stub_p; | |
47ae02b7 | 455 | /* True iff this stub or pointer has been referenced. */ |
ab06d2ff | 456 | bool used; |
457 | } machopic_indirection; | |
458 | ||
b594087e | 459 | struct indirection_hasher : ggc_ptr_hash<machopic_indirection> |
2ef51f0e | 460 | { |
461 | typedef const char *compare_type; | |
462 | static hashval_t hash (machopic_indirection *); | |
463 | static bool equal (machopic_indirection *, const char *); | |
464 | }; | |
465 | ||
ab06d2ff | 466 | /* A table mapping stub names and non-lazy pointer names to |
467 | SYMBOL_REFs for the stubbed-to and pointed-to entities. */ | |
468 | ||
2ef51f0e | 469 | static GTY (()) hash_table<indirection_hasher> *machopic_indirections; |
ab06d2ff | 470 | |
471 | /* Return a hash value for a SLOT in the indirections hash table. */ | |
472 | ||
2ef51f0e | 473 | hashval_t |
474 | indirection_hasher::hash (machopic_indirection *p) | |
ab06d2ff | 475 | { |
6d3abfc0 | 476 | return htab_hash_string (p->ptr_name); |
ab06d2ff | 477 | } |
b40da9a7 | 478 | |
ab06d2ff | 479 | /* Returns true if the KEY is the same as that associated with |
480 | SLOT. */ | |
481 | ||
2ef51f0e | 482 | bool |
483 | indirection_hasher::equal (machopic_indirection *s, const char *k) | |
ab06d2ff | 484 | { |
2ef51f0e | 485 | return strcmp (s->ptr_name, k) == 0; |
ab06d2ff | 486 | } |
80d725d7 | 487 | |
ab06d2ff | 488 | /* Return the name of the non-lazy pointer (if STUB_P is false) or |
4f3ac3c8 | 489 | stub (if STUB_B is true) corresponding to the given name. |
490 | ||
491 | If we have a situation like: | |
492 | ||
493 | global_weak_symbol: | |
494 | .... | |
495 | Lnon_weak_local: | |
496 | .... | |
497 | ||
498 | ld64 will be unable to split this into two atoms (because the "L" makes | |
499 | the second symbol 'invisible'). This means that legitimate direct accesses | |
500 | to the second symbol will appear to be non-allowed direct accesses to an | |
501 | atom of type weak, global which are not allowed. | |
502 | ||
503 | To avoid this, we make the indirections have a leading 'l' (lower-case L) | |
504 | which has a special meaning: linker can see this and use it to determine | |
505 | atoms, but it is not placed into the final symbol table. | |
506 | ||
507 | The implementation here is somewhat heavy-handed in that it will also mark | |
508 | indirections to the __IMPORT,__pointers section the same way which is | |
509 | really unnecessary, since ld64 _can_ split those into atoms as they are | |
510 | fixed size. FIXME: determine if this is a penalty worth extra code to | |
511 | fix. | |
512 | ||
513 | */ | |
8dfaa51b | 514 | |
ab06d2ff | 515 | const char * |
516 | machopic_indirection_name (rtx sym_ref, bool stub_p) | |
517 | { | |
518 | char *buffer; | |
519 | const char *name = XSTR (sym_ref, 0); | |
6d3abfc0 | 520 | size_t namelen = strlen (name); |
ab06d2ff | 521 | machopic_indirection *p; |
524eafbc | 522 | bool needs_quotes; |
523 | const char *suffix; | |
4f3ac3c8 | 524 | char L_or_l = 'L'; |
524eafbc | 525 | const char *prefix = user_label_prefix; |
526 | const char *quote = ""; | |
b359164b | 527 | tree id; |
528 | ||
529 | id = maybe_get_identifier (name); | |
530 | if (id) | |
531 | { | |
532 | tree id_orig = id; | |
533 | ||
534 | while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
535 | id = TREE_CHAIN (id); | |
536 | if (id != id_orig) | |
537 | { | |
538 | name = IDENTIFIER_POINTER (id); | |
539 | namelen = strlen (name); | |
540 | } | |
541 | } | |
b215c058 | 542 | |
524eafbc | 543 | if (name[0] == '*') |
8dfaa51b | 544 | { |
524eafbc | 545 | prefix = ""; |
546 | ++name; | |
547 | --namelen; | |
ab06d2ff | 548 | } |
524eafbc | 549 | |
550 | needs_quotes = name_needs_quotes (name); | |
551 | if (needs_quotes) | |
ab06d2ff | 552 | { |
524eafbc | 553 | quote = "\""; |
8dfaa51b | 554 | } |
555 | ||
524eafbc | 556 | if (stub_p) |
557 | suffix = STUB_SUFFIX; | |
558 | else | |
4f3ac3c8 | 559 | { |
560 | suffix = NON_LAZY_POINTER_SUFFIX; | |
561 | /* Let the linker see this. */ | |
562 | L_or_l = 'l'; | |
563 | } | |
524eafbc | 564 | |
4f3ac3c8 | 565 | buffer = XALLOCAVEC (char, 2 /* strlen ("&L") or ("&l") */ |
524eafbc | 566 | + strlen (prefix) |
567 | + namelen | |
568 | + strlen (suffix) | |
569 | + 2 * strlen (quote) | |
570 | + 1 /* '\0' */); | |
571 | ||
572 | /* Construct the name of the non-lazy pointer or stub. */ | |
4f3ac3c8 | 573 | sprintf (buffer, "&%s%c%s%s%s%s", quote, L_or_l, prefix, name, suffix, quote); |
524eafbc | 574 | |
6d3abfc0 | 575 | if (!machopic_indirections) |
2ef51f0e | 576 | machopic_indirections = hash_table<indirection_hasher>::create_ggc (37); |
b215c058 | 577 | |
2ef51f0e | 578 | machopic_indirection **slot |
579 | = machopic_indirections->find_slot_with_hash (buffer, | |
580 | htab_hash_string (buffer), | |
581 | INSERT); | |
6d3abfc0 | 582 | if (*slot) |
583 | { | |
2ef51f0e | 584 | p = *slot; |
6d3abfc0 | 585 | } |
586 | else | |
ab06d2ff | 587 | { |
25a27413 | 588 | p = ggc_alloc<machopic_indirection> (); |
ab06d2ff | 589 | p->symbol = sym_ref; |
6d3abfc0 | 590 | p->ptr_name = xstrdup (buffer); |
ab06d2ff | 591 | p->stub_p = stub_p; |
6d3abfc0 | 592 | p->used = false; |
593 | *slot = p; | |
ab06d2ff | 594 | } |
b215c058 | 595 | |
6d3abfc0 | 596 | return p->ptr_name; |
80d725d7 | 597 | } |
598 | ||
ab06d2ff | 599 | /* Return the name of the stub for the mcount function. */ |
80d725d7 | 600 | |
ab06d2ff | 601 | const char* |
602 | machopic_mcount_stub_name (void) | |
80d725d7 | 603 | { |
620dd87a | 604 | rtx symbol = gen_rtx_SYMBOL_REF (Pmode, "*mcount"); |
605 | return machopic_indirection_name (symbol, /*stub_p=*/true); | |
80d725d7 | 606 | } |
607 | ||
ab06d2ff | 608 | /* If NAME is the name of a stub or a non-lazy pointer , mark the stub |
609 | or non-lazy pointer as used -- and mark the object to which the | |
610 | pointer/stub refers as used as well, since the pointer/stub will | |
611 | emit a reference to it. */ | |
612 | ||
80d725d7 | 613 | void |
ab06d2ff | 614 | machopic_validate_stub_or_non_lazy_ptr (const char *name) |
80d725d7 | 615 | { |
2ef51f0e | 616 | machopic_indirection *p |
617 | = machopic_indirections->find_with_hash (name, htab_hash_string (name)); | |
6d3abfc0 | 618 | if (p && ! p->used) |
ab06d2ff | 619 | { |
6d3abfc0 | 620 | const char *real_name; |
621 | tree id; | |
b215c058 | 622 | |
6d3abfc0 | 623 | p->used = true; |
624 | ||
09e39ca0 | 625 | /* Do what output_addr_const will do when we actually call it. */ |
626 | if (SYMBOL_REF_DECL (p->symbol)) | |
627 | mark_decl_referenced (SYMBOL_REF_DECL (p->symbol)); | |
628 | ||
629 | real_name = targetm.strip_name_encoding (XSTR (p->symbol, 0)); | |
b215c058 | 630 | |
6d3abfc0 | 631 | id = maybe_get_identifier (real_name); |
632 | if (id) | |
633 | mark_referenced (id); | |
ab06d2ff | 634 | } |
80d725d7 | 635 | } |
636 | ||
637 | /* Transform ORIG, which may be any data source, to the corresponding | |
638 | source using indirections. */ | |
639 | ||
640 | rtx | |
b40da9a7 | 641 | machopic_indirect_data_reference (rtx orig, rtx reg) |
80d725d7 | 642 | { |
643 | rtx ptr_ref = orig; | |
b40da9a7 | 644 | |
80d725d7 | 645 | if (! MACHOPIC_INDIRECT) |
646 | return orig; | |
647 | ||
648 | if (GET_CODE (orig) == SYMBOL_REF) | |
649 | { | |
ab06d2ff | 650 | int defined = machopic_data_defined_p (orig); |
8f74ae7b | 651 | |
652 | if (defined && MACHO_DYNAMIC_NO_PIC_P) | |
653 | { | |
90ff10b3 | 654 | if (DARWIN_PPC) |
655 | { | |
fed0a860 | 656 | /* Create a new register for CSE opportunities. */ |
e1ba4a27 | 657 | rtx hi_reg = (!can_create_pseudo_p () ? reg : gen_reg_rtx (Pmode)); |
fed0a860 | 658 | emit_insn (gen_macho_high (hi_reg, orig)); |
659 | emit_insn (gen_macho_low (reg, hi_reg, orig)); | |
90ff10b3 | 660 | return reg; |
661 | } | |
662 | else if (DARWIN_X86) | |
663 | return orig; | |
664 | else | |
8f74ae7b | 665 | /* some other cpu -- writeme! */ |
27d2baef | 666 | gcc_unreachable (); |
8f74ae7b | 667 | } |
668 | else if (defined) | |
80d725d7 | 669 | { |
90ff10b3 | 670 | rtx offset = NULL; |
671 | if (DARWIN_PPC || HAVE_lo_sum) | |
672 | offset = machopic_gen_offset (orig); | |
80d725d7 | 673 | |
90ff10b3 | 674 | if (DARWIN_PPC) |
675 | { | |
e1ba4a27 | 676 | rtx hi_sum_reg = (!can_create_pseudo_p () |
677 | ? reg | |
678 | : gen_reg_rtx (Pmode)); | |
80d725d7 | 679 | |
27d2baef | 680 | gcc_assert (reg); |
80d725d7 | 681 | |
d1f9b275 | 682 | emit_insn (gen_rtx_SET (hi_sum_reg, |
37ec5024 | 683 | gen_rtx_PLUS (Pmode, pic_offset_table_rtx, |
684 | gen_rtx_HIGH (Pmode, offset)))); | |
d1f9b275 | 685 | emit_insn (gen_rtx_SET (reg, |
3b4a645f | 686 | gen_rtx_LO_SUM (Pmode, hi_sum_reg, |
687 | copy_rtx (offset)))); | |
80d725d7 | 688 | |
689 | orig = reg; | |
90ff10b3 | 690 | } |
691 | else if (HAVE_lo_sum) | |
692 | { | |
27d2baef | 693 | gcc_assert (reg); |
80d725d7 | 694 | |
d1f9b275 | 695 | emit_insn (gen_rtx_SET (reg, gen_rtx_HIGH (Pmode, offset))); |
696 | emit_insn (gen_rtx_SET (reg, gen_rtx_LO_SUM (Pmode, reg, | |
697 | copy_rtx (offset)))); | |
18b42941 | 698 | emit_use (pic_offset_table_rtx); |
80d725d7 | 699 | |
37ec5024 | 700 | orig = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, reg); |
90ff10b3 | 701 | } |
80d725d7 | 702 | return orig; |
703 | } | |
704 | ||
329f67ae | 705 | ptr_ref = (gen_rtx_SYMBOL_REF |
b215c058 | 706 | (Pmode, |
ab06d2ff | 707 | machopic_indirection_name (orig, /*stub_p=*/false))); |
80d725d7 | 708 | |
7c266bb1 | 709 | SYMBOL_REF_DATA (ptr_ref) = SYMBOL_REF_DATA (orig); |
f9226418 | 710 | |
e265a6da | 711 | ptr_ref = gen_const_mem (Pmode, ptr_ref); |
329f67ae | 712 | machopic_define_symbol (ptr_ref); |
80d725d7 | 713 | |
90ff10b3 | 714 | if (DARWIN_X86 |
715 | && reg | |
716 | && MACHO_DYNAMIC_NO_PIC_P) | |
717 | { | |
d1f9b275 | 718 | emit_insn (gen_rtx_SET (reg, ptr_ref)); |
90ff10b3 | 719 | ptr_ref = reg; |
720 | } | |
721 | ||
80d725d7 | 722 | return ptr_ref; |
723 | } | |
724 | else if (GET_CODE (orig) == CONST) | |
725 | { | |
90ff10b3 | 726 | /* If "(const (plus ...", walk the PLUS and return that result. |
727 | PLUS processing (below) will restore the "(const ..." if | |
728 | appropriate. */ | |
80d725d7 | 729 | if (GET_CODE (XEXP (orig, 0)) == PLUS) |
90ff10b3 | 730 | return machopic_indirect_data_reference (XEXP (orig, 0), reg); |
731 | else | |
732 | return orig; | |
733 | } | |
734 | else if (GET_CODE (orig) == MEM) | |
735 | { | |
736 | XEXP (ptr_ref, 0) = | |
737 | machopic_indirect_data_reference (XEXP (orig, 0), reg); | |
738 | return ptr_ref; | |
739 | } | |
740 | else if (GET_CODE (orig) == PLUS) | |
741 | { | |
742 | rtx base, result; | |
743 | /* When the target is i386, this code prevents crashes due to the | |
744 | compiler's ignorance on how to move the PIC base register to | |
745 | other registers. (The reload phase sometimes introduces such | |
746 | insns.) */ | |
747 | if (GET_CODE (XEXP (orig, 0)) == REG | |
748 | && REGNO (XEXP (orig, 0)) == PIC_OFFSET_TABLE_REGNUM | |
749 | /* Prevent the same register from being erroneously used | |
750 | as both the base and index registers. */ | |
751 | && (DARWIN_X86 && (GET_CODE (XEXP (orig, 1)) == CONST)) | |
752 | && reg) | |
80d725d7 | 753 | { |
90ff10b3 | 754 | emit_move_insn (reg, XEXP (orig, 0)); |
755 | XEXP (ptr_ref, 0) = reg; | |
756 | return ptr_ref; | |
80d725d7 | 757 | } |
80d725d7 | 758 | |
90ff10b3 | 759 | /* Legitimize both operands of the PLUS. */ |
760 | base = machopic_indirect_data_reference (XEXP (orig, 0), reg); | |
761 | orig = machopic_indirect_data_reference (XEXP (orig, 1), | |
762 | (base == reg ? 0 : reg)); | |
763 | if (MACHOPIC_INDIRECT && (GET_CODE (orig) == CONST_INT)) | |
29c05e22 | 764 | result = plus_constant (Pmode, base, INTVAL (orig)); |
80d725d7 | 765 | else |
37ec5024 | 766 | result = gen_rtx_PLUS (Pmode, base, orig); |
80d725d7 | 767 | |
80d725d7 | 768 | if (MACHOPIC_JUST_INDIRECT && GET_CODE (base) == MEM) |
769 | { | |
770 | if (reg) | |
771 | { | |
772 | emit_move_insn (reg, result); | |
773 | result = reg; | |
774 | } | |
775 | else | |
776 | { | |
777 | result = force_reg (GET_MODE (result), result); | |
778 | } | |
779 | } | |
780 | ||
781 | return result; | |
80d725d7 | 782 | } |
783 | return ptr_ref; | |
784 | } | |
785 | ||
80d725d7 | 786 | /* Transform TARGET (a MEM), which is a function call target, to the |
787 | corresponding symbol_stub if necessary. Return a new MEM. */ | |
788 | ||
789 | rtx | |
b40da9a7 | 790 | machopic_indirect_call_target (rtx target) |
80d725d7 | 791 | { |
3cf7ab3b | 792 | if (! darwin_emit_branch_islands) |
793 | return target; | |
794 | ||
80d725d7 | 795 | if (GET_CODE (target) != MEM) |
796 | return target; | |
797 | ||
b215c058 | 798 | if (MACHOPIC_INDIRECT |
ab06d2ff | 799 | && GET_CODE (XEXP (target, 0)) == SYMBOL_REF |
800 | && !(SYMBOL_REF_FLAGS (XEXP (target, 0)) | |
801 | & MACHO_SYMBOL_FLAG_DEFINED)) | |
b40da9a7 | 802 | { |
ab06d2ff | 803 | rtx sym_ref = XEXP (target, 0); |
b215c058 | 804 | const char *stub_name = machopic_indirection_name (sym_ref, |
ab06d2ff | 805 | /*stub_p=*/true); |
3754d046 | 806 | machine_mode mode = GET_MODE (sym_ref); |
b215c058 | 807 | |
ab06d2ff | 808 | XEXP (target, 0) = gen_rtx_SYMBOL_REF (mode, stub_name); |
7c266bb1 | 809 | SYMBOL_REF_DATA (XEXP (target, 0)) = SYMBOL_REF_DATA (sym_ref); |
b04fab2a | 810 | MEM_READONLY_P (target) = 1; |
e265a6da | 811 | MEM_NOTRAP_P (target) = 1; |
80d725d7 | 812 | } |
813 | ||
814 | return target; | |
815 | } | |
816 | ||
817 | rtx | |
3754d046 | 818 | machopic_legitimize_pic_address (rtx orig, machine_mode mode, rtx reg) |
80d725d7 | 819 | { |
820 | rtx pic_ref = orig; | |
821 | ||
8f74ae7b | 822 | if (! MACHOPIC_INDIRECT) |
80d725d7 | 823 | return orig; |
824 | ||
825 | /* First handle a simple SYMBOL_REF or LABEL_REF */ | |
826 | if (GET_CODE (orig) == LABEL_REF | |
2c568282 | 827 | || GET_CODE (orig) == SYMBOL_REF) |
80d725d7 | 828 | { |
829 | /* addr(foo) = &func+(foo-func) */ | |
80d725d7 | 830 | orig = machopic_indirect_data_reference (orig, reg); |
831 | ||
b40da9a7 | 832 | if (GET_CODE (orig) == PLUS |
80d725d7 | 833 | && GET_CODE (XEXP (orig, 0)) == REG) |
834 | { | |
835 | if (reg == 0) | |
836 | return force_reg (mode, orig); | |
837 | ||
838 | emit_move_insn (reg, orig); | |
839 | return reg; | |
b40da9a7 | 840 | } |
80d725d7 | 841 | |
80d725d7 | 842 | if (GET_CODE (orig) == MEM) |
843 | { | |
844 | if (reg == 0) | |
845 | { | |
27d2baef | 846 | gcc_assert (!reload_in_progress); |
847 | reg = gen_reg_rtx (Pmode); | |
80d725d7 | 848 | } |
b40da9a7 | 849 | |
90ff10b3 | 850 | #if HAVE_lo_sum |
8f74ae7b | 851 | if (MACHO_DYNAMIC_NO_PIC_P |
852 | && (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
853 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF)) | |
854 | { | |
855 | #if defined (TARGET_TOC) /* ppc */ | |
e1ba4a27 | 856 | rtx temp_reg = (!can_create_pseudo_p () |
857 | ? reg : | |
858 | gen_reg_rtx (Pmode)); | |
8f74ae7b | 859 | rtx asym = XEXP (orig, 0); |
860 | rtx mem; | |
861 | ||
301a5e52 | 862 | emit_insn (gen_macho_high (temp_reg, asym)); |
e265a6da | 863 | mem = gen_const_mem (GET_MODE (orig), |
3b4a645f | 864 | gen_rtx_LO_SUM (Pmode, temp_reg, |
865 | copy_rtx (asym))); | |
d1f9b275 | 866 | emit_insn (gen_rtx_SET (reg, mem)); |
8f74ae7b | 867 | #else |
c4f8e01f | 868 | /* Some other CPU -- WriteMe! but right now there are no other |
869 | platforms that can use dynamic-no-pic */ | |
27d2baef | 870 | gcc_unreachable (); |
8f74ae7b | 871 | #endif |
872 | pic_ref = reg; | |
873 | } | |
874 | else | |
b40da9a7 | 875 | if (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF |
80d725d7 | 876 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) |
877 | { | |
a914e728 | 878 | rtx offset = machopic_gen_offset (XEXP (orig, 0)); |
80d725d7 | 879 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
880 | /* Generating a new reg may expose opportunities for | |
881 | common subexpression elimination. */ | |
e1ba4a27 | 882 | rtx hi_sum_reg = (!can_create_pseudo_p () |
883 | ? reg | |
884 | : gen_reg_rtx (Pmode)); | |
37ec5024 | 885 | rtx mem; |
37ec5024 | 886 | rtx sum; |
b215c058 | 887 | |
37ec5024 | 888 | sum = gen_rtx_HIGH (Pmode, offset); |
889 | if (! MACHO_DYNAMIC_NO_PIC_P) | |
890 | sum = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, sum); | |
80d725d7 | 891 | |
d1f9b275 | 892 | emit_insn (gen_rtx_SET (hi_sum_reg, sum)); |
37ec5024 | 893 | |
e265a6da | 894 | mem = gen_const_mem (GET_MODE (orig), |
b215c058 | 895 | gen_rtx_LO_SUM (Pmode, |
3b4a645f | 896 | hi_sum_reg, |
897 | copy_rtx (offset))); | |
26cd1198 | 898 | rtx_insn *insn = emit_insn (gen_rtx_SET (reg, mem)); |
24153880 | 899 | set_unique_reg_note (insn, REG_EQUAL, pic_ref); |
37ec5024 | 900 | |
901 | pic_ref = reg; | |
80d725d7 | 902 | #else |
18b42941 | 903 | emit_use (gen_rtx_REG (Pmode, PIC_OFFSET_TABLE_REGNUM)); |
37ec5024 | 904 | |
d1f9b275 | 905 | emit_insn (gen_rtx_SET (reg, |
37ec5024 | 906 | gen_rtx_HIGH (Pmode, |
b215c058 | 907 | gen_rtx_CONST (Pmode, |
37ec5024 | 908 | offset)))); |
d1f9b275 | 909 | emit_insn (gen_rtx_SET (reg, |
37ec5024 | 910 | gen_rtx_LO_SUM (Pmode, reg, |
3b4a645f | 911 | gen_rtx_CONST (Pmode, |
912 | copy_rtx (offset))))); | |
37ec5024 | 913 | pic_ref = gen_rtx_PLUS (Pmode, |
914 | pic_offset_table_rtx, reg); | |
80d725d7 | 915 | #endif |
916 | } | |
917 | else | |
918 | #endif /* HAVE_lo_sum */ | |
919 | { | |
920 | rtx pic = pic_offset_table_rtx; | |
921 | if (GET_CODE (pic) != REG) | |
922 | { | |
923 | emit_move_insn (reg, pic); | |
924 | pic = reg; | |
925 | } | |
926 | #if 0 | |
18b42941 | 927 | emit_use (gen_rtx_REG (Pmode, PIC_OFFSET_TABLE_REGNUM)); |
80d725d7 | 928 | #endif |
929 | ||
3e111a71 | 930 | if (reload_in_progress) |
3072d30e | 931 | df_set_regs_ever_live (REGNO (pic), true); |
b06a3cc3 | 932 | pic_ref = gen_rtx_PLUS (Pmode, pic, |
a914e728 | 933 | machopic_gen_offset (XEXP (orig, 0))); |
80d725d7 | 934 | } |
b40da9a7 | 935 | |
80d725d7 | 936 | #if !defined (TARGET_TOC) |
80d725d7 | 937 | emit_move_insn (reg, pic_ref); |
e265a6da | 938 | pic_ref = gen_const_mem (GET_MODE (orig), reg); |
7ba97778 | 939 | #endif |
80d725d7 | 940 | } |
941 | else | |
942 | { | |
943 | ||
90ff10b3 | 944 | #if HAVE_lo_sum |
b40da9a7 | 945 | if (GET_CODE (orig) == SYMBOL_REF |
80d725d7 | 946 | || GET_CODE (orig) == LABEL_REF) |
947 | { | |
a914e728 | 948 | rtx offset = machopic_gen_offset (orig); |
80d725d7 | 949 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
950 | rtx hi_sum_reg; | |
951 | ||
952 | if (reg == 0) | |
953 | { | |
27d2baef | 954 | gcc_assert (!reload_in_progress); |
955 | reg = gen_reg_rtx (Pmode); | |
80d725d7 | 956 | } |
b40da9a7 | 957 | |
80d725d7 | 958 | hi_sum_reg = reg; |
959 | ||
d1f9b275 | 960 | emit_insn (gen_rtx_SET (hi_sum_reg, |
37ec5024 | 961 | (MACHO_DYNAMIC_NO_PIC_P) |
962 | ? gen_rtx_HIGH (Pmode, offset) | |
963 | : gen_rtx_PLUS (Pmode, | |
964 | pic_offset_table_rtx, | |
b215c058 | 965 | gen_rtx_HIGH (Pmode, |
37ec5024 | 966 | offset)))); |
d1f9b275 | 967 | emit_insn (gen_rtx_SET (reg, |
37ec5024 | 968 | gen_rtx_LO_SUM (Pmode, |
3b4a645f | 969 | hi_sum_reg, |
970 | copy_rtx (offset)))); | |
80d725d7 | 971 | pic_ref = reg; |
972 | #else | |
d1f9b275 | 973 | emit_insn (gen_rtx_SET (reg, gen_rtx_HIGH (Pmode, offset))); |
974 | emit_insn (gen_rtx_SET (reg, | |
3b4a645f | 975 | gen_rtx_LO_SUM (Pmode, reg, |
976 | copy_rtx (offset)))); | |
37ec5024 | 977 | pic_ref = gen_rtx_PLUS (Pmode, |
978 | pic_offset_table_rtx, reg); | |
80d725d7 | 979 | #endif |
980 | } | |
981 | else | |
982 | #endif /* HAVE_lo_sum */ | |
983 | { | |
7a5893fc | 984 | if (REG_P (orig) |
985 | || GET_CODE (orig) == SUBREG) | |
80d725d7 | 986 | { |
987 | return orig; | |
988 | } | |
989 | else | |
990 | { | |
991 | rtx pic = pic_offset_table_rtx; | |
992 | if (GET_CODE (pic) != REG) | |
993 | { | |
994 | emit_move_insn (reg, pic); | |
995 | pic = reg; | |
996 | } | |
997 | #if 0 | |
18b42941 | 998 | emit_use (pic_offset_table_rtx); |
80d725d7 | 999 | #endif |
3e111a71 | 1000 | if (reload_in_progress) |
3072d30e | 1001 | df_set_regs_ever_live (REGNO (pic), true); |
37ec5024 | 1002 | pic_ref = gen_rtx_PLUS (Pmode, |
1003 | pic, | |
a914e728 | 1004 | machopic_gen_offset (orig)); |
80d725d7 | 1005 | } |
1006 | } | |
1007 | } | |
1008 | ||
80d725d7 | 1009 | if (GET_CODE (pic_ref) != REG) |
1010 | { | |
1011 | if (reg != 0) | |
1012 | { | |
1013 | emit_move_insn (reg, pic_ref); | |
1014 | return reg; | |
1015 | } | |
1016 | else | |
1017 | { | |
1018 | return force_reg (mode, pic_ref); | |
1019 | } | |
1020 | } | |
1021 | else | |
1022 | { | |
1023 | return pic_ref; | |
1024 | } | |
1025 | } | |
80d725d7 | 1026 | else if (GET_CODE (orig) == PLUS |
1027 | && (GET_CODE (XEXP (orig, 0)) == MEM | |
1028 | || GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
1029 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) | |
1030 | && XEXP (orig, 0) != pic_offset_table_rtx | |
1031 | && GET_CODE (XEXP (orig, 1)) != REG) | |
b40da9a7 | 1032 | |
80d725d7 | 1033 | { |
1034 | rtx base; | |
1035 | int is_complex = (GET_CODE (XEXP (orig, 0)) == MEM); | |
1036 | ||
1037 | base = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
1038 | orig = machopic_legitimize_pic_address (XEXP (orig, 1), | |
1039 | Pmode, (base == reg ? 0 : reg)); | |
1040 | if (GET_CODE (orig) == CONST_INT) | |
1041 | { | |
29c05e22 | 1042 | pic_ref = plus_constant (Pmode, base, INTVAL (orig)); |
80d725d7 | 1043 | is_complex = 1; |
1044 | } | |
1045 | else | |
37ec5024 | 1046 | pic_ref = gen_rtx_PLUS (Pmode, base, orig); |
80d725d7 | 1047 | |
80d725d7 | 1048 | if (reg && is_complex) |
1049 | { | |
1050 | emit_move_insn (reg, pic_ref); | |
1051 | pic_ref = reg; | |
1052 | } | |
1053 | /* Likewise, should we set special REG_NOTEs here? */ | |
1054 | } | |
80d725d7 | 1055 | else if (GET_CODE (orig) == CONST) |
1056 | { | |
1057 | return machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
1058 | } | |
80d725d7 | 1059 | else if (GET_CODE (orig) == MEM |
1060 | && GET_CODE (XEXP (orig, 0)) == SYMBOL_REF) | |
1061 | { | |
1062 | rtx addr = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
b04fab2a | 1063 | addr = replace_equiv_address (orig, addr); |
80d725d7 | 1064 | emit_move_insn (reg, addr); |
1065 | pic_ref = reg; | |
1066 | } | |
1067 | ||
1068 | return pic_ref; | |
1069 | } | |
1070 | ||
ab06d2ff | 1071 | /* Output the stub or non-lazy pointer in *SLOT, if it has been used. |
1072 | DATA is the FILE* for assembly output. Called from | |
1073 | htab_traverse. */ | |
80d725d7 | 1074 | |
2ef51f0e | 1075 | int |
1076 | machopic_output_indirection (machopic_indirection **slot, FILE *asm_out_file) | |
80d725d7 | 1077 | { |
2ef51f0e | 1078 | machopic_indirection *p = *slot; |
ab06d2ff | 1079 | rtx symbol; |
1080 | const char *sym_name; | |
1081 | const char *ptr_name; | |
b215c058 | 1082 | |
ab06d2ff | 1083 | if (!p->used) |
1084 | return 1; | |
80d725d7 | 1085 | |
ab06d2ff | 1086 | symbol = p->symbol; |
1087 | sym_name = XSTR (symbol, 0); | |
6d3abfc0 | 1088 | ptr_name = p->ptr_name; |
b215c058 | 1089 | |
ab06d2ff | 1090 | if (p->stub_p) |
80d725d7 | 1091 | { |
80d725d7 | 1092 | char *sym; |
1093 | char *stub; | |
b359164b | 1094 | tree id; |
1095 | ||
1096 | id = maybe_get_identifier (sym_name); | |
1097 | if (id) | |
1098 | { | |
1099 | tree id_orig = id; | |
1100 | ||
1101 | while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
1102 | id = TREE_CHAIN (id); | |
1103 | if (id != id_orig) | |
1104 | sym_name = IDENTIFIER_POINTER (id); | |
1105 | } | |
80d725d7 | 1106 | |
225ab426 | 1107 | sym = XALLOCAVEC (char, strlen (sym_name) + 2); |
80d725d7 | 1108 | if (sym_name[0] == '*' || sym_name[0] == '&') |
1109 | strcpy (sym, sym_name + 1); | |
1110 | else if (sym_name[0] == '-' || sym_name[0] == '+') | |
b40da9a7 | 1111 | strcpy (sym, sym_name); |
80d725d7 | 1112 | else |
e9764bbb | 1113 | sprintf (sym, "%s%s", user_label_prefix, sym_name); |
80d725d7 | 1114 | |
225ab426 | 1115 | stub = XALLOCAVEC (char, strlen (ptr_name) + 2); |
ab06d2ff | 1116 | if (ptr_name[0] == '*' || ptr_name[0] == '&') |
1117 | strcpy (stub, ptr_name + 1); | |
80d725d7 | 1118 | else |
ab06d2ff | 1119 | sprintf (stub, "%s%s", user_label_prefix, ptr_name); |
80d725d7 | 1120 | |
09e39ca0 | 1121 | machopic_output_stub (asm_out_file, sym, stub); |
80d725d7 | 1122 | } |
f0ed0e8a | 1123 | else if (! indirect_data (symbol) |
8d806159 | 1124 | && (machopic_symbol_defined_p (symbol) |
1125 | || SYMBOL_REF_LOCAL_P (symbol))) | |
80d725d7 | 1126 | { |
2f14b1f9 | 1127 | switch_to_section (data_section); |
ab06d2ff | 1128 | assemble_align (GET_MODE_ALIGNMENT (Pmode)); |
427eb138 | 1129 | assemble_label (asm_out_file, ptr_name); |
ab06d2ff | 1130 | assemble_integer (gen_rtx_SYMBOL_REF (Pmode, sym_name), |
1131 | GET_MODE_SIZE (Pmode), | |
1132 | GET_MODE_ALIGNMENT (Pmode), 1); | |
80d725d7 | 1133 | } |
ab06d2ff | 1134 | else |
1135 | { | |
f0ed0e8a | 1136 | rtx init = const0_rtx; |
1137 | ||
92e4ba7d | 1138 | switch_to_section (darwin_sections[machopic_nl_symbol_ptr_section]); |
cd186228 | 1139 | |
1140 | /* Mach-O symbols are passed around in code through indirect | |
1141 | references and the original symbol_ref hasn't passed through | |
1142 | the generic handling and reference-catching in | |
1143 | output_operand, so we need to manually mark weak references | |
1144 | as such. */ | |
1145 | if (SYMBOL_REF_WEAK (symbol)) | |
1146 | { | |
1147 | tree decl = SYMBOL_REF_DECL (symbol); | |
1148 | gcc_assert (DECL_P (decl)); | |
1149 | ||
1150 | if (decl != NULL_TREE | |
1151 | && DECL_EXTERNAL (decl) && TREE_PUBLIC (decl) | |
1152 | /* Handle only actual external-only definitions, not | |
1153 | e.g. extern inline code or variables for which | |
1154 | storage has been allocated. */ | |
1155 | && !TREE_STATIC (decl)) | |
1156 | { | |
1157 | fputs ("\t.weak_reference ", asm_out_file); | |
1158 | assemble_name (asm_out_file, sym_name); | |
1159 | fputc ('\n', asm_out_file); | |
1160 | } | |
1161 | } | |
1162 | ||
ab06d2ff | 1163 | assemble_name (asm_out_file, ptr_name); |
1164 | fprintf (asm_out_file, ":\n"); | |
b215c058 | 1165 | |
ab06d2ff | 1166 | fprintf (asm_out_file, "\t.indirect_symbol "); |
1167 | assemble_name (asm_out_file, sym_name); | |
1168 | fprintf (asm_out_file, "\n"); | |
b215c058 | 1169 | |
f0ed0e8a | 1170 | /* Variables that are marked with MACHO_SYMBOL_STATIC need to |
1171 | have their symbol name instead of 0 in the second entry of | |
1172 | the non-lazy symbol pointer data structure when they are | |
1173 | defined. This allows the runtime to rebind newer instances | |
1174 | of the translation unit with the original instance of the | |
d188633a | 1175 | symbol. */ |
f0ed0e8a | 1176 | |
1177 | if ((SYMBOL_REF_FLAGS (symbol) & MACHO_SYMBOL_STATIC) | |
1178 | && machopic_symbol_defined_p (symbol)) | |
1179 | init = gen_rtx_SYMBOL_REF (Pmode, sym_name); | |
1180 | ||
1181 | assemble_integer (init, GET_MODE_SIZE (Pmode), | |
ab06d2ff | 1182 | GET_MODE_ALIGNMENT (Pmode), 1); |
1183 | } | |
b215c058 | 1184 | |
ab06d2ff | 1185 | return 1; |
1186 | } | |
1187 | ||
1188 | void | |
1189 | machopic_finish (FILE *asm_out_file) | |
1190 | { | |
1191 | if (machopic_indirections) | |
2ef51f0e | 1192 | machopic_indirections |
1193 | ->traverse_noresize<FILE *, machopic_output_indirection> (asm_out_file); | |
80d725d7 | 1194 | } |
1195 | ||
b40da9a7 | 1196 | int |
1197 | machopic_operand_p (rtx op) | |
80d725d7 | 1198 | { |
1199 | if (MACHOPIC_JUST_INDIRECT) | |
a914e728 | 1200 | return (GET_CODE (op) == SYMBOL_REF |
1201 | && machopic_symbol_defined_p (op)); | |
1202 | else | |
1203 | return (GET_CODE (op) == CONST | |
1204 | && GET_CODE (XEXP (op, 0)) == UNSPEC | |
1205 | && XINT (XEXP (op, 0), 1) == UNSPEC_MACHOPIC_OFFSET); | |
80d725d7 | 1206 | } |
8dfaa51b | 1207 | |
1208 | /* This function records whether a given name corresponds to a defined | |
1209 | or undefined function or variable, for machopic_classify_ident to | |
1210 | use later. */ | |
1211 | ||
1212 | void | |
b40da9a7 | 1213 | darwin_encode_section_info (tree decl, rtx rtl, int first ATTRIBUTE_UNUSED) |
8dfaa51b | 1214 | { |
5a121a91 | 1215 | rtx sym_ref; |
8dfaa51b | 1216 | |
9af9a32c | 1217 | /* Do the standard encoding things first. */ |
1218 | default_encode_section_info (decl, rtl, first); | |
1219 | ||
ab06d2ff | 1220 | if (TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL) |
1221 | return; | |
9af9a32c | 1222 | |
ab06d2ff | 1223 | sym_ref = XEXP (rtl, 0); |
1224 | if (TREE_CODE (decl) == VAR_DECL) | |
1225 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_VARIABLE; | |
1226 | ||
1227 | if (!DECL_EXTERNAL (decl) | |
1dc74225 | 1228 | && (!TREE_PUBLIC (decl) || !DECL_WEAK (decl)) |
0a3ecdc1 | 1229 | && ! lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)) |
8dfaa51b | 1230 | && ((TREE_STATIC (decl) |
1231 | && (!DECL_COMMON (decl) || !TREE_PUBLIC (decl))) | |
2f4fae92 | 1232 | || (!DECL_COMMON (decl) && DECL_INITIAL (decl) |
fd419242 | 1233 | && DECL_INITIAL (decl) != error_mark_node))) |
ab06d2ff | 1234 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; |
f0ed0e8a | 1235 | |
d188633a | 1236 | if (! TREE_PUBLIC (decl)) |
f0ed0e8a | 1237 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_STATIC; |
e479d0de | 1238 | } |
01d15dc5 | 1239 | |
9423c9b7 | 1240 | void |
1241 | darwin_mark_decl_preserved (const char *name) | |
1242 | { | |
565f322f | 1243 | /* Actually we shouldn't mark any local symbol this way, but for now |
1244 | this only happens with ObjC meta-data. */ | |
1245 | if (darwin_label_is_anonymous_local_objc_name (name)) | |
1246 | return; | |
1247 | ||
163c9fff | 1248 | fprintf (asm_out_file, "\t.no_dead_strip "); |
9423c9b7 | 1249 | assemble_name (asm_out_file, name); |
1250 | fputc ('\n', asm_out_file); | |
1251 | } | |
1252 | ||
50e6797e | 1253 | static section * |
f199808c | 1254 | darwin_rodata_section (int use_coal, bool zsize) |
50e6797e | 1255 | { |
f199808c | 1256 | return (use_coal |
50e6797e | 1257 | ? darwin_sections[const_coal_section] |
8e79e9d4 | 1258 | : (zsize ? darwin_sections[zobj_const_section] |
1259 | : darwin_sections[const_section])); | |
50e6797e | 1260 | } |
b40da9a7 | 1261 | |
50e6797e | 1262 | static section * |
1263 | darwin_mergeable_string_section (tree exp, | |
1264 | unsigned HOST_WIDE_INT align) | |
1265 | { | |
1991f4fd | 1266 | /* Darwin's ld expects to see non-writable string literals in the .cstring |
1267 | section. Later versions of ld check and complain when CFStrings are | |
1268 | enabled. Therefore we shall force the strings into .cstring since we | |
1269 | don't support writable ones anyway. */ | |
1270 | if ((darwin_constant_cfstrings || flag_merge_constants) | |
50e6797e | 1271 | && TREE_CODE (exp) == STRING_CST |
1272 | && TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE | |
1273 | && align <= 256 | |
a7df40d7 | 1274 | && (int_size_in_bytes (TREE_TYPE (exp)) |
1275 | == TREE_STRING_LENGTH (exp)) | |
b40da9a7 | 1276 | && ((size_t) TREE_STRING_LENGTH (exp) |
a814bad5 | 1277 | == strlen (TREE_STRING_POINTER (exp)) + 1)) |
92e4ba7d | 1278 | return darwin_sections[cstring_section]; |
50e6797e | 1279 | |
8e79e9d4 | 1280 | if (DARWIN_SECTION_ANCHORS && flag_section_anchors |
1281 | && TREE_CODE (exp) == STRING_CST | |
1282 | && TREE_STRING_LENGTH (exp) == 0) | |
1283 | return darwin_sections[zobj_const_section]; | |
1284 | ||
50e6797e | 1285 | return readonly_data_section; |
1286 | } | |
1287 | ||
4be92808 | 1288 | #ifndef HAVE_GAS_LITERAL16 |
1289 | #define HAVE_GAS_LITERAL16 0 | |
1290 | #endif | |
1291 | ||
50e6797e | 1292 | static section * |
1293 | darwin_mergeable_constant_section (tree exp, | |
8e79e9d4 | 1294 | unsigned HOST_WIDE_INT align, |
1295 | bool zsize) | |
50e6797e | 1296 | { |
3754d046 | 1297 | machine_mode mode = DECL_MODE (exp); |
50e6797e | 1298 | unsigned int modesize = GET_MODE_BITSIZE (mode); |
1299 | ||
8e79e9d4 | 1300 | if (DARWIN_SECTION_ANCHORS |
1301 | && flag_section_anchors | |
1302 | && zsize) | |
1303 | return darwin_sections[zobj_const_section]; | |
1304 | ||
50e6797e | 1305 | if (flag_merge_constants |
1306 | && mode != VOIDmode | |
1307 | && mode != BLKmode | |
1308 | && modesize <= align | |
1309 | && align >= 8 | |
1310 | && align <= 256 | |
1311 | && (align & (align -1)) == 0) | |
52470889 | 1312 | { |
853b103d | 1313 | tree size = TYPE_SIZE_UNIT (TREE_TYPE (exp)); |
52470889 | 1314 | |
e913b5cd | 1315 | if (TREE_CODE (size) == INTEGER_CST) |
1316 | { | |
e3d0f65c | 1317 | if (wi::to_wide (size) == 4) |
e913b5cd | 1318 | return darwin_sections[literal4_section]; |
e3d0f65c | 1319 | else if (wi::to_wide (size) == 8) |
e913b5cd | 1320 | return darwin_sections[literal8_section]; |
1321 | else if (HAVE_GAS_LITERAL16 | |
1322 | && TARGET_64BIT | |
e3d0f65c | 1323 | && wi::to_wide (size) == 16) |
e913b5cd | 1324 | return darwin_sections[literal16_section]; |
1325 | } | |
50e6797e | 1326 | } |
1327 | ||
1328 | return readonly_data_section; | |
1329 | } | |
1330 | ||
e3ef604c | 1331 | section * |
1332 | darwin_tm_clone_table_section (void) | |
1333 | { | |
1334 | return get_named_section (NULL, | |
1335 | "__DATA,__tm_clone_table,regular,no_dead_strip", | |
1336 | 3); | |
1337 | } | |
1338 | ||
0b769e4a | 1339 | int |
1340 | machopic_reloc_rw_mask (void) | |
1341 | { | |
1342 | return MACHOPIC_INDIRECT ? 3 : 0; | |
1343 | } | |
1344 | ||
267785bc | 1345 | /* We have to deal with ObjC/C++ metadata section placement in the common |
1346 | code, since it will also be called from LTO. | |
1347 | ||
1348 | Return metadata attributes, if present (searching for ABI=2 first) | |
1349 | Return NULL_TREE if no such attributes are found. */ | |
1350 | ||
1351 | static tree | |
1352 | is_objc_metadata (tree decl) | |
1353 | { | |
1354 | if (DECL_P (decl) | |
1355 | && (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == CONST_DECL) | |
1356 | && DECL_ATTRIBUTES (decl)) | |
1357 | { | |
1358 | tree meta = lookup_attribute ("OBJC2META", DECL_ATTRIBUTES (decl)); | |
1359 | if (meta) | |
1360 | return meta; | |
1361 | meta = lookup_attribute ("OBJC1META", DECL_ATTRIBUTES (decl)); | |
1362 | if (meta) | |
1363 | return meta; | |
1364 | } | |
1365 | return NULL_TREE; | |
1366 | } | |
1367 | ||
236ce1d1 | 1368 | static int classes_seen; |
1369 | static int objc_metadata_seen; | |
1370 | ||
267785bc | 1371 | /* Return the section required for Objective C ABI 2 metadata. */ |
1372 | static section * | |
1373 | darwin_objc2_section (tree decl ATTRIBUTE_UNUSED, tree meta, section * base) | |
1374 | { | |
1375 | const char *p; | |
1376 | tree ident = TREE_VALUE (meta); | |
1377 | gcc_assert (TREE_CODE (ident) == IDENTIFIER_NODE); | |
1378 | p = IDENTIFIER_POINTER (ident); | |
1379 | ||
236ce1d1 | 1380 | gcc_checking_assert (flag_next_runtime == 1 && flag_objc_abi == 2); |
267785bc | 1381 | |
236ce1d1 | 1382 | objc_metadata_seen = 1; |
267785bc | 1383 | |
1384 | if (base == data_section) | |
1385 | base = darwin_sections[objc2_metadata_section]; | |
1386 | ||
1387 | /* Most of the OBJC2 META-data end up in the base section, so check it | |
1388 | first. */ | |
1389 | if (!strncmp (p, "V2_BASE", 7)) | |
1390 | return base; | |
1391 | else if (!strncmp (p, "V2_STRG", 7)) | |
1392 | return darwin_sections[cstring_section]; | |
1393 | ||
1394 | else if (!strncmp (p, "G2_META", 7) || !strncmp (p, "G2_CLAS", 7)) | |
1395 | return darwin_sections[objc2_classdefs_section]; | |
1396 | else if (!strncmp (p, "V2_MREF", 7)) | |
1397 | return darwin_sections[objc2_message_refs_section]; | |
1398 | else if (!strncmp (p, "V2_CLRF", 7)) | |
1399 | return darwin_sections[objc2_classrefs_section]; | |
1400 | else if (!strncmp (p, "V2_SURF", 7)) | |
1401 | return darwin_sections[objc2_super_classrefs_section]; | |
1402 | else if (!strncmp (p, "V2_NLCL", 7)) | |
1403 | return darwin_sections[objc2_nonlazy_class_section]; | |
1404 | else if (!strncmp (p, "V2_CLAB", 7)) | |
236ce1d1 | 1405 | { |
1406 | classes_seen = 1; | |
1407 | return darwin_sections[objc2_classlist_section]; | |
1408 | } | |
267785bc | 1409 | else if (!strncmp (p, "V2_SRFS", 7)) |
1410 | return darwin_sections[objc2_selector_refs_section]; | |
1411 | else if (!strncmp (p, "V2_NLCA", 7)) | |
1412 | return darwin_sections[objc2_nonlazy_category_section]; | |
1413 | else if (!strncmp (p, "V2_CALA", 7)) | |
1414 | return darwin_sections[objc2_categorylist_section]; | |
1415 | ||
1416 | else if (!strncmp (p, "V2_PLST", 7)) | |
1417 | return darwin_sections[objc2_protocollist_section]; | |
1418 | else if (!strncmp (p, "V2_PRFS", 7)) | |
1419 | return darwin_sections[objc2_protocolrefs_section]; | |
1420 | ||
1421 | else if (!strncmp (p, "V2_INFO", 7)) | |
1422 | return darwin_sections[objc2_image_info_section]; | |
1423 | ||
1424 | else if (!strncmp (p, "V2_EHTY", 7)) | |
f199808c | 1425 | return ld_uses_coal_sects ? darwin_sections[data_coal_section] |
1426 | : data_section; | |
267785bc | 1427 | |
1428 | else if (!strncmp (p, "V2_CSTR", 7)) | |
1429 | return darwin_sections[objc2_constant_string_object_section]; | |
1430 | ||
1431 | /* Not recognized, default. */ | |
1432 | return base; | |
1433 | } | |
1434 | ||
1435 | /* Return the section required for Objective C ABI 0/1 metadata. */ | |
1436 | static section * | |
1437 | darwin_objc1_section (tree decl ATTRIBUTE_UNUSED, tree meta, section * base) | |
1438 | { | |
1439 | const char *p; | |
1440 | tree ident = TREE_VALUE (meta); | |
1441 | gcc_assert (TREE_CODE (ident) == IDENTIFIER_NODE); | |
1442 | p = IDENTIFIER_POINTER (ident); | |
1443 | ||
236ce1d1 | 1444 | gcc_checking_assert (flag_next_runtime == 1 && flag_objc_abi < 2); |
1445 | ||
1446 | objc_metadata_seen = 1; | |
267785bc | 1447 | |
1448 | /* String sections first, cos there are lots of strings. */ | |
1449 | if (!strncmp (p, "V1_STRG", 7)) | |
1450 | return darwin_sections[cstring_section]; | |
1451 | else if (!strncmp (p, "V1_CLSN", 7)) | |
1452 | return darwin_sections[objc_class_names_section]; | |
1453 | else if (!strncmp (p, "V1_METN", 7)) | |
1454 | return darwin_sections[objc_meth_var_names_section]; | |
1455 | else if (!strncmp (p, "V1_METT", 7)) | |
1456 | return darwin_sections[objc_meth_var_types_section]; | |
1457 | ||
1458 | else if (!strncmp (p, "V1_CLAS", 7)) | |
236ce1d1 | 1459 | { |
1460 | classes_seen = 1; | |
1461 | return darwin_sections[objc_class_section]; | |
1462 | } | |
267785bc | 1463 | else if (!strncmp (p, "V1_META", 7)) |
1464 | return darwin_sections[objc_meta_class_section]; | |
1465 | else if (!strncmp (p, "V1_CATG", 7)) | |
1466 | return darwin_sections[objc_category_section]; | |
1467 | else if (!strncmp (p, "V1_PROT", 7)) | |
1468 | return darwin_sections[objc_protocol_section]; | |
1469 | ||
1470 | else if (!strncmp (p, "V1_CLCV", 7)) | |
1471 | return darwin_sections[objc_class_vars_section]; | |
1472 | else if (!strncmp (p, "V1_CLIV", 7)) | |
1473 | return darwin_sections[objc_instance_vars_section]; | |
1474 | ||
1475 | else if (!strncmp (p, "V1_CLCM", 7)) | |
1476 | return darwin_sections[objc_cls_meth_section]; | |
1477 | else if (!strncmp (p, "V1_CLIM", 7)) | |
1478 | return darwin_sections[objc_inst_meth_section]; | |
1479 | else if (!strncmp (p, "V1_CACM", 7)) | |
1480 | return darwin_sections[objc_cat_cls_meth_section]; | |
1481 | else if (!strncmp (p, "V1_CAIM", 7)) | |
1482 | return darwin_sections[objc_cat_inst_meth_section]; | |
1483 | else if (!strncmp (p, "V1_PNSM", 7)) | |
1484 | return darwin_sections[objc_cat_inst_meth_section]; | |
1485 | else if (!strncmp (p, "V1_PCLM", 7)) | |
1486 | return darwin_sections[objc_cat_cls_meth_section]; | |
1487 | ||
1488 | else if (!strncmp (p, "V1_CLPR", 7)) | |
1489 | return darwin_sections[objc_cat_cls_meth_section]; | |
1490 | else if (!strncmp (p, "V1_CAPR", 7)) | |
1491 | return darwin_sections[objc_category_section]; /* ??? CHECK me. */ | |
1492 | ||
1493 | else if (!strncmp (p, "V1_PRFS", 7)) | |
1494 | return darwin_sections[objc_cat_cls_meth_section]; | |
1495 | else if (!strncmp (p, "V1_CLRF", 7)) | |
1496 | return darwin_sections[objc_cls_refs_section]; | |
1497 | else if (!strncmp (p, "V1_SRFS", 7)) | |
1498 | return darwin_sections[objc_selector_refs_section]; | |
1499 | ||
1500 | else if (!strncmp (p, "V1_MODU", 7)) | |
1501 | return darwin_sections[objc_module_info_section]; | |
1502 | else if (!strncmp (p, "V1_SYMT", 7)) | |
1503 | return darwin_sections[objc_symbols_section]; | |
1504 | else if (!strncmp (p, "V1_INFO", 7)) | |
1505 | return darwin_sections[objc_image_info_section]; | |
1506 | ||
1507 | else if (!strncmp (p, "V1_PLST", 7)) | |
1508 | return darwin_sections[objc1_prop_list_section]; | |
1509 | else if (!strncmp (p, "V1_PEXT", 7)) | |
1510 | return darwin_sections[objc1_protocol_ext_section]; | |
1511 | else if (!strncmp (p, "V1_CEXT", 7)) | |
1512 | return darwin_sections[objc1_class_ext_section]; | |
1513 | ||
1514 | else if (!strncmp (p, "V2_CSTR", 7)) | |
1515 | return darwin_sections[objc_constant_string_object_section]; | |
1516 | ||
1517 | return base; | |
1518 | } | |
1519 | ||
50e6797e | 1520 | section * |
1521 | machopic_select_section (tree decl, | |
1522 | int reloc, | |
1523 | unsigned HOST_WIDE_INT align) | |
1524 | { | |
f199808c | 1525 | bool zsize, one, weak, use_coal, ro; |
3b73548b | 1526 | section *base_section = NULL; |
50e6797e | 1527 | |
8e79e9d4 | 1528 | weak = (DECL_P (decl) |
1529 | && DECL_WEAK (decl) | |
1530 | && !lookup_attribute ("weak_import", DECL_ATTRIBUTES (decl))); | |
1531 | ||
f199808c | 1532 | zsize = (DECL_P (decl) |
8e79e9d4 | 1533 | && (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == CONST_DECL) |
e913b5cd | 1534 | && tree_to_uhwi (DECL_SIZE_UNIT (decl)) == 0); |
8e79e9d4 | 1535 | |
f199808c | 1536 | one = DECL_P (decl) |
8e79e9d4 | 1537 | && TREE_CODE (decl) == VAR_DECL |
b395f451 | 1538 | && DECL_COMDAT_GROUP (decl); |
8e79e9d4 | 1539 | |
f199808c | 1540 | use_coal = (weak || one) && ld_uses_coal_sects; |
1541 | ||
8e79e9d4 | 1542 | ro = TREE_READONLY (decl) || TREE_CONSTANT (decl) ; |
1543 | ||
c6134e23 | 1544 | switch (categorize_decl_for_section (decl, reloc)) |
50e6797e | 1545 | { |
1546 | case SECCAT_TEXT: | |
9e09909d | 1547 | gcc_unreachable (); |
50e6797e | 1548 | break; |
1549 | ||
1550 | case SECCAT_RODATA: | |
1551 | case SECCAT_SRODATA: | |
f199808c | 1552 | base_section = darwin_rodata_section (use_coal, zsize); |
50e6797e | 1553 | break; |
1554 | ||
1555 | case SECCAT_RODATA_MERGE_STR: | |
1556 | base_section = darwin_mergeable_string_section (decl, align); | |
1557 | break; | |
1558 | ||
1559 | case SECCAT_RODATA_MERGE_STR_INIT: | |
1560 | base_section = darwin_mergeable_string_section (DECL_INITIAL (decl), align); | |
1561 | break; | |
1562 | ||
1563 | case SECCAT_RODATA_MERGE_CONST: | |
8e79e9d4 | 1564 | base_section = darwin_mergeable_constant_section (decl, align, zsize); |
50e6797e | 1565 | break; |
1566 | ||
1567 | case SECCAT_DATA: | |
1568 | case SECCAT_DATA_REL: | |
1569 | case SECCAT_DATA_REL_LOCAL: | |
1570 | case SECCAT_DATA_REL_RO: | |
1571 | case SECCAT_DATA_REL_RO_LOCAL: | |
1572 | case SECCAT_SDATA: | |
1573 | case SECCAT_TDATA: | |
f199808c | 1574 | if (use_coal) |
8e79e9d4 | 1575 | { |
1576 | if (ro) | |
1577 | base_section = darwin_sections[const_data_coal_section]; | |
1578 | else | |
1579 | base_section = darwin_sections[data_coal_section]; | |
1580 | } | |
1581 | else if (DARWIN_SECTION_ANCHORS | |
1582 | && flag_section_anchors | |
1583 | && zsize) | |
1584 | { | |
1585 | /* If we're doing section anchors, then punt zero-sized objects into | |
1586 | their own sections so that they don't interfere with offset | |
1587 | computation for the remaining vars. This does not need to be done | |
1588 | for stuff in mergeable sections, since these are ineligible for | |
1589 | anchors. */ | |
1590 | if (ro) | |
1591 | base_section = darwin_sections[zobj_const_data_section]; | |
1592 | else | |
1593 | base_section = darwin_sections[zobj_data_section]; | |
1594 | } | |
1595 | else if (ro) | |
1596 | base_section = darwin_sections[const_data_section]; | |
1597 | else | |
1598 | base_section = data_section; | |
1599 | break; | |
50e6797e | 1600 | case SECCAT_BSS: |
1601 | case SECCAT_SBSS: | |
1602 | case SECCAT_TBSS: | |
f199808c | 1603 | if (use_coal) |
8e79e9d4 | 1604 | base_section = darwin_sections[data_coal_section]; |
52470889 | 1605 | else |
8e79e9d4 | 1606 | { |
1607 | if (!TREE_PUBLIC (decl)) | |
1608 | base_section = lcomm_section; | |
1609 | else if (bss_noswitch_section) | |
1610 | base_section = bss_noswitch_section; | |
1611 | else | |
1612 | base_section = data_section; | |
1613 | } | |
50e6797e | 1614 | break; |
1615 | ||
1616 | default: | |
1617 | gcc_unreachable (); | |
52470889 | 1618 | } |
50e6797e | 1619 | |
267785bc | 1620 | /* Darwin weird special cases. |
1621 | a) OBJC Meta-data. */ | |
1622 | if (DECL_P (decl) | |
1623 | && (TREE_CODE (decl) == VAR_DECL | |
1624 | || TREE_CODE (decl) == CONST_DECL) | |
1625 | && DECL_ATTRIBUTES (decl)) | |
1626 | { | |
1627 | tree meta = lookup_attribute ("OBJC2META", DECL_ATTRIBUTES (decl)); | |
1628 | if (meta) | |
1629 | return darwin_objc2_section (decl, meta, base_section); | |
1630 | meta = lookup_attribute ("OBJC1META", DECL_ATTRIBUTES (decl)); | |
1631 | if (meta) | |
1632 | return darwin_objc1_section (decl, meta, base_section); | |
1633 | meta = lookup_attribute ("OBJC1METG", DECL_ATTRIBUTES (decl)); | |
1634 | if (meta) | |
1635 | return base_section; /* GNU runtime is happy with it all in one pot. */ | |
1636 | } | |
1637 | ||
1638 | /* b) Constant string objects. */ | |
50e6797e | 1639 | if (TREE_CODE (decl) == CONSTRUCTOR |
1640 | && TREE_TYPE (decl) | |
1641 | && TREE_CODE (TREE_TYPE (decl)) == RECORD_TYPE | |
1642 | && TYPE_NAME (TREE_TYPE (decl))) | |
52470889 | 1643 | { |
50e6797e | 1644 | tree name = TYPE_NAME (TREE_TYPE (decl)); |
52470889 | 1645 | if (TREE_CODE (name) == TYPE_DECL) |
50e6797e | 1646 | name = DECL_NAME (name); |
0616a948 | 1647 | |
1648 | if (!strcmp (IDENTIFIER_POINTER (name), "__builtin_ObjCString")) | |
267785bc | 1649 | { |
1650 | if (flag_next_runtime) | |
1651 | { | |
1652 | if (flag_objc_abi == 2) | |
1653 | return darwin_sections[objc2_constant_string_object_section]; | |
1654 | else | |
1655 | return darwin_sections[objc_constant_string_object_section]; | |
1656 | } | |
1657 | else | |
1658 | return darwin_sections[objc_string_object_section]; | |
1659 | } | |
d4238e8b | 1660 | else if (!strcmp (IDENTIFIER_POINTER (name), "__builtin_CFString")) |
1661 | return darwin_sections[cfstring_constant_object_section]; | |
52470889 | 1662 | else |
267785bc | 1663 | return base_section; |
52470889 | 1664 | } |
267785bc | 1665 | /* c) legacy meta-data selection. */ |
50e6797e | 1666 | else if (TREE_CODE (decl) == VAR_DECL |
1667 | && DECL_NAME (decl) | |
1668 | && TREE_CODE (DECL_NAME (decl)) == IDENTIFIER_NODE | |
1669 | && IDENTIFIER_POINTER (DECL_NAME (decl)) | |
267785bc | 1670 | && flag_next_runtime |
50e6797e | 1671 | && !strncmp (IDENTIFIER_POINTER (DECL_NAME (decl)), "_OBJC_", 6)) |
52470889 | 1672 | { |
50e6797e | 1673 | const char *name = IDENTIFIER_POINTER (DECL_NAME (decl)); |
267785bc | 1674 | static bool warned_objc_46 = false; |
8e79e9d4 | 1675 | /* We shall assert that zero-sized objects are an error in ObjC |
1676 | meta-data. */ | |
e913b5cd | 1677 | gcc_assert (tree_to_uhwi (DECL_SIZE_UNIT (decl)) != 0); |
267785bc | 1678 | |
1679 | /* ??? This mechanism for determining the metadata section is | |
1680 | broken when LTO is in use, since the frontend that generated | |
1681 | the data is not identified. We will keep the capability for | |
1682 | the short term - in case any non-Objective-C programs are using | |
1683 | it to place data in specified sections. */ | |
1684 | if (!warned_objc_46) | |
1685 | { | |
1686 | location_t loc = DECL_SOURCE_LOCATION (decl); | |
1687 | warning_at (loc, 0, "the use of _OBJC_-prefixed variable names" | |
1688 | " to select meta-data sections is deprecated at 4.6" | |
1689 | " and will be removed in 4.7"); | |
1690 | warned_objc_46 = true; | |
1691 | } | |
1692 | ||
52470889 | 1693 | if (!strncmp (name, "_OBJC_CLASS_METHODS_", 20)) |
50e6797e | 1694 | return darwin_sections[objc_cls_meth_section]; |
52470889 | 1695 | else if (!strncmp (name, "_OBJC_INSTANCE_METHODS_", 23)) |
50e6797e | 1696 | return darwin_sections[objc_inst_meth_section]; |
8e79e9d4 | 1697 | else if (!strncmp (name, "_OBJC_CATEGORY_CLASS_METHODS_", 29)) |
50e6797e | 1698 | return darwin_sections[objc_cat_cls_meth_section]; |
8e79e9d4 | 1699 | else if (!strncmp (name, "_OBJC_CATEGORY_INSTANCE_METHODS_", 32)) |
50e6797e | 1700 | return darwin_sections[objc_cat_inst_meth_section]; |
52470889 | 1701 | else if (!strncmp (name, "_OBJC_CLASS_VARIABLES_", 22)) |
50e6797e | 1702 | return darwin_sections[objc_class_vars_section]; |
52470889 | 1703 | else if (!strncmp (name, "_OBJC_INSTANCE_VARIABLES_", 25)) |
50e6797e | 1704 | return darwin_sections[objc_instance_vars_section]; |
52470889 | 1705 | else if (!strncmp (name, "_OBJC_CLASS_PROTOCOLS_", 22)) |
50e6797e | 1706 | return darwin_sections[objc_cat_cls_meth_section]; |
52470889 | 1707 | else if (!strncmp (name, "_OBJC_CLASS_NAME_", 17)) |
50e6797e | 1708 | return darwin_sections[objc_class_names_section]; |
52470889 | 1709 | else if (!strncmp (name, "_OBJC_METH_VAR_NAME_", 20)) |
50e6797e | 1710 | return darwin_sections[objc_meth_var_names_section]; |
52470889 | 1711 | else if (!strncmp (name, "_OBJC_METH_VAR_TYPE_", 20)) |
50e6797e | 1712 | return darwin_sections[objc_meth_var_types_section]; |
52470889 | 1713 | else if (!strncmp (name, "_OBJC_CLASS_REFERENCES", 22)) |
50e6797e | 1714 | return darwin_sections[objc_cls_refs_section]; |
52470889 | 1715 | else if (!strncmp (name, "_OBJC_CLASS_", 12)) |
50e6797e | 1716 | return darwin_sections[objc_class_section]; |
52470889 | 1717 | else if (!strncmp (name, "_OBJC_METACLASS_", 16)) |
50e6797e | 1718 | return darwin_sections[objc_meta_class_section]; |
52470889 | 1719 | else if (!strncmp (name, "_OBJC_CATEGORY_", 15)) |
50e6797e | 1720 | return darwin_sections[objc_category_section]; |
52470889 | 1721 | else if (!strncmp (name, "_OBJC_SELECTOR_REFERENCES", 25)) |
50e6797e | 1722 | return darwin_sections[objc_selector_refs_section]; |
52470889 | 1723 | else if (!strncmp (name, "_OBJC_SELECTOR_FIXUP", 20)) |
50e6797e | 1724 | return darwin_sections[objc_selector_fixup_section]; |
52470889 | 1725 | else if (!strncmp (name, "_OBJC_SYMBOLS", 13)) |
50e6797e | 1726 | return darwin_sections[objc_symbols_section]; |
52470889 | 1727 | else if (!strncmp (name, "_OBJC_MODULES", 13)) |
50e6797e | 1728 | return darwin_sections[objc_module_info_section]; |
c17b85ea | 1729 | else if (!strncmp (name, "_OBJC_IMAGE_INFO", 16)) |
50e6797e | 1730 | return darwin_sections[objc_image_info_section]; |
52470889 | 1731 | else if (!strncmp (name, "_OBJC_PROTOCOL_INSTANCE_METHODS_", 32)) |
50e6797e | 1732 | return darwin_sections[objc_cat_inst_meth_section]; |
52470889 | 1733 | else if (!strncmp (name, "_OBJC_PROTOCOL_CLASS_METHODS_", 29)) |
50e6797e | 1734 | return darwin_sections[objc_cat_cls_meth_section]; |
52470889 | 1735 | else if (!strncmp (name, "_OBJC_PROTOCOL_REFS_", 20)) |
50e6797e | 1736 | return darwin_sections[objc_cat_cls_meth_section]; |
52470889 | 1737 | else if (!strncmp (name, "_OBJC_PROTOCOL_", 15)) |
50e6797e | 1738 | return darwin_sections[objc_protocol_section]; |
52470889 | 1739 | else |
50e6797e | 1740 | return base_section; |
52470889 | 1741 | } |
50e6797e | 1742 | |
1743 | return base_section; | |
52470889 | 1744 | } |
1745 | ||
bbfbe351 | 1746 | /* This can be called with address expressions as "rtx". |
9cb8e99f | 1747 | They must go in "const". */ |
bbfbe351 | 1748 | |
2f14b1f9 | 1749 | section * |
3754d046 | 1750 | machopic_select_rtx_section (machine_mode mode, rtx x, |
b40da9a7 | 1751 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) |
bbfbe351 | 1752 | { |
f2e8796e | 1753 | if (GET_MODE_SIZE (mode) == 8 |
1754 | && (GET_CODE (x) == CONST_INT | |
219f3246 | 1755 | || GET_CODE (x) == CONST_WIDE_INT |
f2e8796e | 1756 | || GET_CODE (x) == CONST_DOUBLE)) |
92e4ba7d | 1757 | return darwin_sections[literal8_section]; |
bbfbe351 | 1758 | else if (GET_MODE_SIZE (mode) == 4 |
1759 | && (GET_CODE (x) == CONST_INT | |
219f3246 | 1760 | || GET_CODE (x) == CONST_WIDE_INT |
bbfbe351 | 1761 | || GET_CODE (x) == CONST_DOUBLE)) |
92e4ba7d | 1762 | return darwin_sections[literal4_section]; |
4be92808 | 1763 | else if (HAVE_GAS_LITERAL16 |
1764 | && TARGET_64BIT | |
7463cbdf | 1765 | && GET_MODE_SIZE (mode) == 16 |
3ebc7dec | 1766 | && (GET_CODE (x) == CONST_INT |
219f3246 | 1767 | || GET_CODE (x) == CONST_WIDE_INT |
2805e80b | 1768 | || GET_CODE (x) == CONST_DOUBLE |
1769 | || GET_CODE (x) == CONST_VECTOR)) | |
3ebc7dec | 1770 | return darwin_sections[literal16_section]; |
459f8624 | 1771 | else if (MACHOPIC_INDIRECT |
76dece62 | 1772 | && (GET_CODE (x) == SYMBOL_REF |
1773 | || GET_CODE (x) == CONST | |
1774 | || GET_CODE (x) == LABEL_REF)) | |
92e4ba7d | 1775 | return darwin_sections[const_data_section]; |
bbfbe351 | 1776 | else |
92e4ba7d | 1777 | return darwin_sections[const_section]; |
bbfbe351 | 1778 | } |
1779 | ||
01d15dc5 | 1780 | void |
b40da9a7 | 1781 | machopic_asm_out_constructor (rtx symbol, int priority ATTRIBUTE_UNUSED) |
01d15dc5 | 1782 | { |
ed161dab | 1783 | cdtor_record new_elt = {symbol, priority, vec_safe_length (ctors)}; |
4b313269 | 1784 | |
1785 | vec_safe_push (ctors, new_elt); | |
1786 | ||
1787 | if (! MACHOPIC_INDIRECT) | |
1788 | fprintf (asm_out_file, ".reference .constructors_used\n"); | |
1789 | } | |
1790 | ||
ed161dab | 1791 | void |
1792 | machopic_asm_out_destructor (rtx symbol, int priority ATTRIBUTE_UNUSED) | |
1793 | { | |
1794 | cdtor_record new_elt = {symbol, priority, vec_safe_length (dtors)}; | |
1795 | ||
1796 | vec_safe_push (dtors, new_elt); | |
1797 | ||
1798 | if (! MACHOPIC_INDIRECT) | |
1799 | fprintf (asm_out_file, ".reference .destructors_used\n"); | |
1800 | } | |
1801 | ||
4b313269 | 1802 | static int |
ed161dab | 1803 | sort_cdtor_records (const void * a, const void * b) |
4b313269 | 1804 | { |
ed161dab | 1805 | const cdtor_record *cda = (const cdtor_record *)a; |
1806 | const cdtor_record *cdb = (const cdtor_record *)b; | |
1807 | if (cda->priority > cdb->priority) | |
4b313269 | 1808 | return 1; |
ed161dab | 1809 | if (cda->priority < cdb->priority) |
4b313269 | 1810 | return -1; |
ed161dab | 1811 | if (cda->position > cdb->position) |
4b313269 | 1812 | return 1; |
ed161dab | 1813 | if (cda->position < cdb->position) |
4b313269 | 1814 | return -1; |
1815 | return 0; | |
1816 | } | |
1817 | ||
1818 | static void | |
ed161dab | 1819 | finalize_ctors () |
4b313269 | 1820 | { |
1821 | unsigned int i; | |
ed161dab | 1822 | cdtor_record *elt; |
4b313269 | 1823 | |
8f74ae7b | 1824 | if (MACHOPIC_INDIRECT) |
92e4ba7d | 1825 | switch_to_section (darwin_sections[mod_init_section]); |
01d15dc5 | 1826 | else |
92e4ba7d | 1827 | switch_to_section (darwin_sections[constructor_section]); |
01d15dc5 | 1828 | |
4b313269 | 1829 | if (vec_safe_length (ctors) > 1) |
ed161dab | 1830 | ctors->qsort (sort_cdtor_records); |
4b313269 | 1831 | FOR_EACH_VEC_SAFE_ELT (ctors, i, elt) |
1832 | { | |
1833 | assemble_align (POINTER_SIZE); | |
1834 | assemble_integer (elt->symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
1835 | } | |
01d15dc5 | 1836 | } |
1837 | ||
ed161dab | 1838 | static void |
1839 | finalize_dtors () | |
01d15dc5 | 1840 | { |
ed161dab | 1841 | unsigned int i; |
1842 | cdtor_record *elt; | |
1843 | ||
8f74ae7b | 1844 | if (MACHOPIC_INDIRECT) |
92e4ba7d | 1845 | switch_to_section (darwin_sections[mod_term_section]); |
01d15dc5 | 1846 | else |
92e4ba7d | 1847 | switch_to_section (darwin_sections[destructor_section]); |
01d15dc5 | 1848 | |
ed161dab | 1849 | if (vec_safe_length (dtors) > 1) |
1850 | dtors->qsort (sort_cdtor_records); | |
1851 | FOR_EACH_VEC_SAFE_ELT (dtors, i, elt) | |
1852 | { | |
1853 | assemble_align (POINTER_SIZE); | |
1854 | assemble_integer (elt->symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
1855 | } | |
01d15dc5 | 1856 | } |
1f3233d1 | 1857 | |
67c1e638 | 1858 | void |
b40da9a7 | 1859 | darwin_globalize_label (FILE *stream, const char *name) |
67c1e638 | 1860 | { |
1861 | if (!!strncmp (name, "_OBJC_", 6)) | |
1862 | default_globalize_label (stream, name); | |
1863 | } | |
1864 | ||
32e31f06 | 1865 | /* This routine returns non-zero if 'name' starts with the special objective-c |
1866 | anonymous file-scope static name. It accommodates c++'s mangling of such | |
1867 | symbols (in this case the symbols will have form _ZL{d}*_OBJC_* d=digit). */ | |
1868 | ||
1869 | int | |
1870 | darwin_label_is_anonymous_local_objc_name (const char *name) | |
1871 | { | |
1872 | const unsigned char *p = (const unsigned char *) name; | |
1873 | if (*p != '_') | |
1874 | return 0; | |
1875 | if (p[1] == 'Z' && p[2] == 'L') | |
1876 | { | |
1877 | p += 3; | |
1878 | while (*p >= '0' && *p <= '9') | |
1879 | p++; | |
1880 | } | |
1881 | return (!strncmp ((const char *)p, "_OBJC_", 6)); | |
1882 | } | |
1883 | ||
13e2f0a0 | 1884 | /* LTO support for Mach-O. |
23433d72 | 1885 | |
13e2f0a0 | 1886 | This version uses three mach-o sections to encapsulate the (unlimited |
1887 | number of) lto sections. | |
23433d72 | 1888 | |
13e2f0a0 | 1889 | __GNU_LTO, __lto_sections contains the concatented GNU LTO section data. |
1890 | __GNU_LTO, __section_names contains the GNU LTO section names. | |
1891 | __GNU_LTO, __section_index contains an array of values that index these. | |
23433d72 | 1892 | |
13e2f0a0 | 1893 | Indexed thus: |
1894 | <section offset from the start of __GNU_LTO, __lto_sections>, | |
1895 | <section length> | |
1896 | <name offset from the start of __GNU_LTO, __section_names, | |
1897 | <name length>. | |
1898 | ||
1899 | At present, for both m32 and m64 mach-o files each of these fields is | |
1900 | represented by a uint32_t. This is because, AFAICT, a mach-o object | |
1901 | cannot exceed 4Gb because the section_64 offset field (see below) is 32bits. | |
1902 | ||
1903 | uint32_t offset; | |
1904 | "offset An integer specifying the offset to this section in the file." */ | |
1905 | ||
1906 | /* Count lto section numbers. */ | |
1907 | static unsigned int lto_section_num = 0; | |
1908 | ||
1909 | /* A vector of information about LTO sections, at present, we only have | |
1910 | the name. TODO: see if we can get the data length somehow. */ | |
1911 | typedef struct GTY (()) darwin_lto_section_e { | |
1912 | const char *sectname; | |
1913 | } darwin_lto_section_e ; | |
13e2f0a0 | 1914 | |
f1f41a6c | 1915 | static GTY (()) vec<darwin_lto_section_e, va_gc> *lto_section_names; |
13e2f0a0 | 1916 | |
13e2f0a0 | 1917 | /* Section wrapper scheme (used here to wrap the unlimited number of LTO |
1918 | sections into three Mach-O ones). | |
1919 | NOTE: These names MUST be kept in sync with those in | |
1920 | libiberty/simple-object-mach-o. */ | |
1921 | #define LTO_SECTS_SECTION "__wrapper_sects" | |
1922 | #define LTO_NAMES_SECTION "__wrapper_names" | |
1923 | #define LTO_INDEX_SECTION "__wrapper_index" | |
23433d72 | 1924 | |
1925 | /* File to temporarily store LTO data. This is appended to asm_out_file | |
1926 | in darwin_end_file. */ | |
1927 | static FILE *lto_asm_out_file, *saved_asm_out_file; | |
1928 | static char *lto_asm_out_name; | |
7c7883aa | 1929 | static enum debug_info_levels saved_debug_info_level; |
23433d72 | 1930 | |
1931 | /* Prepare asm_out_file for LTO output. For darwin, this means hiding | |
1932 | asm_out_file and switching to an alternative output file. */ | |
1933 | void | |
1934 | darwin_asm_lto_start (void) | |
1935 | { | |
1936 | gcc_assert (! saved_asm_out_file); | |
1937 | saved_asm_out_file = asm_out_file; | |
7c7883aa | 1938 | saved_debug_info_level = debug_info_level; |
1939 | debug_info_level = DINFO_LEVEL_NONE; | |
23433d72 | 1940 | if (! lto_asm_out_name) |
1941 | lto_asm_out_name = make_temp_file (".lto.s"); | |
1942 | lto_asm_out_file = fopen (lto_asm_out_name, "a"); | |
1943 | if (lto_asm_out_file == NULL) | |
c05be867 | 1944 | fatal_error (input_location, |
1945 | "failed to open temporary file %s for LTO output", | |
23433d72 | 1946 | lto_asm_out_name); |
1947 | asm_out_file = lto_asm_out_file; | |
1948 | } | |
1949 | ||
1950 | /* Restore asm_out_file. */ | |
1951 | void | |
1952 | darwin_asm_lto_end (void) | |
1953 | { | |
1954 | gcc_assert (saved_asm_out_file); | |
1955 | fclose (lto_asm_out_file); | |
1956 | asm_out_file = saved_asm_out_file; | |
1957 | saved_asm_out_file = NULL; | |
7c7883aa | 1958 | debug_info_level = saved_debug_info_level; |
23433d72 | 1959 | } |
1960 | ||
edea89b9 | 1961 | static void |
7b53e714 | 1962 | darwin_asm_dwarf_section (const char *name, unsigned int flags, |
1963 | tree decl, bool is_for_lto); | |
edea89b9 | 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) |
7b53e714 | 2005 | darwin_asm_dwarf_section (name, flags, decl, false); |
2006 | else if (strncmp (name, "__GNU_DWARF_LTO,", 16) == 0) | |
2007 | darwin_asm_dwarf_section (name, flags, decl, true); | |
23433d72 | 2008 | else |
2009 | fprintf (asm_out_file, "\t.section %s\n", name); | |
2f9fc8ef | 2010 | } |
2011 | ||
b215c058 | 2012 | void |
1dc74225 | 2013 | darwin_unique_section (tree decl ATTRIBUTE_UNUSED, int reloc ATTRIBUTE_UNUSED) |
2f9fc8ef | 2014 | { |
1dc74225 | 2015 | /* Darwin does not use unique sections. */ |
2f9fc8ef | 2016 | } |
2017 | ||
5b182752 | 2018 | /* Handle __attribute__ ((apple_kext_compatibility)). |
2019 | This only applies to darwin kexts for 2.95 compatibility -- it shrinks the | |
2020 | vtable for classes with this attribute (and their descendants) by not | |
2021 | outputting the new 3.0 nondeleting destructor. This means that such | |
2022 | objects CANNOT be allocated on the stack or as globals UNLESS they have | |
2023 | a completely empty `operator delete'. | |
2024 | Luckily, this fits in with the Darwin kext model. | |
2025 | ||
2026 | This attribute also disables gcc3's potential overlaying of derived | |
2027 | class data members on the padding at the end of the base class. */ | |
2028 | ||
2029 | tree | |
2030 | darwin_handle_kext_attribute (tree *node, tree name, | |
2031 | tree args ATTRIBUTE_UNUSED, | |
2032 | int flags ATTRIBUTE_UNUSED, | |
2033 | bool *no_add_attrs) | |
2034 | { | |
2035 | /* APPLE KEXT stuff -- only applies with pure static C++ code. */ | |
2036 | if (! TARGET_KEXTABI) | |
2037 | { | |
67a779df | 2038 | warning (0, "%qE 2.95 vtable-compatibility attribute applies " |
2039 | "only when compiling a kext", name); | |
5b182752 | 2040 | |
2041 | *no_add_attrs = true; | |
2042 | } | |
2043 | else if (TREE_CODE (*node) != RECORD_TYPE) | |
2044 | { | |
67a779df | 2045 | warning (0, "%qE 2.95 vtable-compatibility attribute applies " |
2046 | "only to C++ classes", name); | |
5b182752 | 2047 | |
2048 | *no_add_attrs = true; | |
2049 | } | |
2050 | ||
2051 | return NULL_TREE; | |
2052 | } | |
2053 | ||
975d636c | 2054 | /* Handle a "weak_import" attribute; arguments as in |
2055 | struct attribute_spec.handler. */ | |
2056 | ||
2057 | tree | |
2058 | darwin_handle_weak_import_attribute (tree *node, tree name, | |
2059 | tree ARG_UNUSED (args), | |
2060 | int ARG_UNUSED (flags), | |
2061 | bool * no_add_attrs) | |
2062 | { | |
d0ddd548 | 2063 | if (TREE_CODE (*node) != FUNCTION_DECL && TREE_CODE (*node) != VAR_DECL) |
975d636c | 2064 | { |
67a779df | 2065 | warning (OPT_Wattributes, "%qE attribute ignored", |
2066 | name); | |
975d636c | 2067 | *no_add_attrs = true; |
2068 | } | |
2069 | else | |
2070 | declare_weak (*node); | |
2071 | ||
2072 | return NULL_TREE; | |
2073 | } | |
a3952a36 | 2074 | |
b215c058 | 2075 | /* Emit a label for an FDE, making it global and/or weak if appropriate. |
ef1074f7 | 2076 | The third parameter is nonzero if this is for exception handling. |
2077 | The fourth parameter is nonzero if this is just a placeholder for an | |
2f9fc8ef | 2078 | FDE that we are omitting. */ |
ef1074f7 | 2079 | |
b215c058 | 2080 | void |
ef1074f7 | 2081 | darwin_emit_unwind_label (FILE *file, tree decl, int for_eh, int empty) |
2f9fc8ef | 2082 | { |
9e09909d | 2083 | char *lab ; |
2084 | char buf[32]; | |
2085 | static int invok_count = 0; | |
2086 | static tree last_fun_decl = NULL_TREE; | |
2087 | ||
2088 | /* We use the linker to emit the .eh labels for Darwin 9 and above. */ | |
2089 | if (! for_eh || generating_for_darwin_version >= 9) | |
d08d29c0 | 2090 | return; |
2f9fc8ef | 2091 | |
9e09909d | 2092 | /* FIXME: This only works when the eh for all sections of a function is |
2093 | emitted at the same time. If that changes, we would need to use a lookup | |
2094 | table of some form to determine what to do. Also, we should emit the | |
2095 | unadorned label for the partition containing the public label for a | |
2096 | function. This is of limited use, probably, since we do not currently | |
2097 | enable partitioning. */ | |
2098 | strcpy (buf, ".eh"); | |
2099 | if (decl && TREE_CODE (decl) == FUNCTION_DECL) | |
2100 | { | |
2101 | if (decl == last_fun_decl) | |
2102 | { | |
2103 | invok_count++; | |
2104 | snprintf (buf, 31, "$$part$$%d.eh", invok_count); | |
2105 | } | |
2106 | else | |
2107 | { | |
2108 | last_fun_decl = decl; | |
2109 | invok_count = 0; | |
2110 | } | |
2111 | } | |
2112 | ||
2113 | lab = concat (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)), buf, NULL); | |
2f9fc8ef | 2114 | |
2115 | if (TREE_PUBLIC (decl)) | |
e8f535c2 | 2116 | { |
2117 | targetm.asm_out.globalize_label (file, lab); | |
2118 | if (DECL_VISIBILITY (decl) == VISIBILITY_HIDDEN) | |
2119 | { | |
2120 | fputs ("\t.private_extern ", file); | |
2121 | assemble_name (file, lab); | |
2122 | fputc ('\n', file); | |
2123 | } | |
2124 | } | |
2f9fc8ef | 2125 | |
1dc74225 | 2126 | if (DECL_WEAK (decl)) |
e8f535c2 | 2127 | { |
2128 | fputs ("\t.weak_definition ", file); | |
2129 | assemble_name (file, lab); | |
2130 | fputc ('\n', file); | |
2131 | } | |
2f9fc8ef | 2132 | |
e8f535c2 | 2133 | assemble_name (file, lab); |
2f9fc8ef | 2134 | if (empty) |
a3952a36 | 2135 | { |
e8f535c2 | 2136 | fputs (" = 0\n", file); |
a3952a36 | 2137 | |
2138 | /* Mark the absolute .eh and .eh1 style labels as needed to | |
2139 | ensure that we don't dead code strip them and keep such | |
2140 | labels from another instantiation point until we can fix this | |
2141 | properly with group comdat support. */ | |
e8f535c2 | 2142 | darwin_mark_decl_preserved (lab); |
a3952a36 | 2143 | } |
2f9fc8ef | 2144 | else |
e8f535c2 | 2145 | fputs (":\n", file); |
2f9fc8ef | 2146 | |
2147 | free (lab); | |
2148 | } | |
2149 | ||
b215c058 | 2150 | static GTY(()) unsigned long except_table_label_num; |
2151 | ||
2152 | void | |
2153 | darwin_emit_except_table_label (FILE *file) | |
2154 | { | |
2155 | char section_start_label[30]; | |
2156 | ||
2157 | ASM_GENERATE_INTERNAL_LABEL (section_start_label, "GCC_except_table", | |
2158 | except_table_label_num++); | |
2159 | ASM_OUTPUT_LABEL (file, section_start_label); | |
2160 | } | |
2161 | /* Generate a PC-relative reference to a Mach-O non-lazy-symbol. */ | |
ef1074f7 | 2162 | |
2f9fc8ef | 2163 | void |
2164 | darwin_non_lazy_pcrel (FILE *file, rtx addr) | |
2165 | { | |
2f9fc8ef | 2166 | const char *nlp_name; |
2167 | ||
27d2baef | 2168 | gcc_assert (GET_CODE (addr) == SYMBOL_REF); |
2f9fc8ef | 2169 | |
ab06d2ff | 2170 | nlp_name = machopic_indirection_name (addr, /*stub_p=*/false); |
2f9fc8ef | 2171 | fputs ("\t.long\t", file); |
2172 | ASM_OUTPUT_LABELREF (file, nlp_name); | |
2173 | fputs ("-.", file); | |
2174 | } | |
2175 | ||
8e79e9d4 | 2176 | /* If this is uncommented, details of each allocation will be printed |
2177 | in the asm right before the actual code. WARNING - this will cause some | |
2178 | test-suite fails (since the printout will contain items that some tests | |
2179 | are not expecting) -- so don't leave it on by default (it bloats the | |
2180 | asm too). */ | |
2181 | /*#define DEBUG_DARWIN_MEM_ALLOCATORS*/ | |
2182 | ||
2183 | /* The first two of these routines are ostensibly just intended to put | |
2184 | names into the asm. However, they are both hijacked in order to ensure | |
2185 | that zero-sized items do not make their way into the output. Consequently, | |
2186 | we also need to make these participate in provisions for dealing with | |
2187 | such items in section anchors. */ | |
2188 | ||
2189 | /* The implementation of ASM_DECLARE_OBJECT_NAME. */ | |
2190 | /* The RTTI data (e.g., __ti4name) is common and public (and static), | |
2191 | but it does need to be referenced via indirect PIC data pointers. | |
2192 | The machopic_define_symbol calls are telling the machopic subsystem | |
2193 | that the name *is* defined in this module, so it doesn't need to | |
2194 | make them indirect. */ | |
2195 | void | |
2196 | darwin_asm_declare_object_name (FILE *file, | |
2197 | const char *nam, tree decl) | |
2198 | { | |
2199 | const char *xname = nam; | |
2200 | unsigned HOST_WIDE_INT size; | |
2201 | bool local_def, weak; | |
2202 | ||
2203 | weak = (DECL_P (decl) | |
2204 | && DECL_WEAK (decl) | |
2205 | && !lookup_attribute ("weak_import", | |
2206 | DECL_ATTRIBUTES (decl))); | |
2207 | ||
2208 | local_def = DECL_INITIAL (decl) || (TREE_STATIC (decl) | |
2209 | && (!DECL_COMMON (decl) | |
2210 | || !TREE_PUBLIC (decl))); | |
2211 | ||
2212 | if (GET_CODE (XEXP (DECL_RTL (decl), 0)) != SYMBOL_REF) | |
2213 | xname = IDENTIFIER_POINTER (DECL_NAME (decl)); | |
2214 | ||
2215 | if (local_def) | |
2216 | { | |
2217 | (* targetm.encode_section_info) (decl, DECL_RTL (decl), false); | |
2218 | if (!weak) | |
2219 | machopic_define_symbol (DECL_RTL (decl)); | |
2220 | } | |
2221 | ||
e913b5cd | 2222 | size = tree_to_uhwi (DECL_SIZE_UNIT (decl)); |
8e79e9d4 | 2223 | |
2224 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2225 | fprintf (file, "# dadon: %s %s (%llu, %u) local %d weak %d" | |
2226 | " stat %d com %d pub %d t-const %d t-ro %d init %lx\n", | |
2227 | xname, (TREE_CODE (decl) == VAR_DECL?"var":"const"), | |
2228 | (unsigned long long)size, DECL_ALIGN (decl), local_def, | |
2229 | DECL_WEAK (decl), TREE_STATIC (decl), DECL_COMMON (decl), | |
2230 | TREE_PUBLIC (decl), TREE_CONSTANT (decl), TREE_READONLY (decl), | |
2231 | (unsigned long)DECL_INITIAL (decl)); | |
2232 | #endif | |
2233 | ||
2234 | /* Darwin needs help to support local zero-sized objects. | |
2235 | They must be made at least one byte, and the section containing must be | |
2236 | marked as unsuitable for section-anchors (see storage allocators below). | |
2237 | ||
2238 | For non-zero objects this output is handled by varasm.c. | |
2239 | */ | |
2240 | if (!size) | |
2241 | { | |
2242 | unsigned int l2align = 0; | |
2243 | ||
a967a7ec | 2244 | /* The align must be honored, even for zero-sized. */ |
8e79e9d4 | 2245 | if (DECL_ALIGN (decl)) |
2246 | { | |
2247 | l2align = floor_log2 (DECL_ALIGN (decl) / BITS_PER_UNIT); | |
2248 | fprintf (file, "\t.align\t%u\n", l2align); | |
2249 | } | |
2250 | ||
2251 | ASM_OUTPUT_LABEL (file, xname); | |
2252 | size = 1; | |
f03df321 | 2253 | fprintf (file, "\t.space\t" HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); |
8e79e9d4 | 2254 | |
2255 | /* Check that we've correctly picked up the zero-sized item and placed it | |
2256 | properly. */ | |
2257 | gcc_assert ((!DARWIN_SECTION_ANCHORS || !flag_section_anchors) | |
2258 | || (in_section | |
2259 | && (in_section->common.flags & SECTION_NO_ANCHOR))); | |
2260 | } | |
2261 | else | |
2262 | ASM_OUTPUT_LABEL (file, xname); | |
2263 | } | |
427eb138 | 2264 | |
8e79e9d4 | 2265 | /* The implementation of ASM_DECLARE_CONSTANT_NAME. */ |
427eb138 | 2266 | void |
2267 | darwin_asm_declare_constant_name (FILE *file, const char *name, | |
2268 | const_tree exp ATTRIBUTE_UNUSED, | |
2269 | HOST_WIDE_INT size) | |
2270 | { | |
2271 | assemble_label (file, name); | |
8e79e9d4 | 2272 | /* As for other items, we need at least one byte. */ |
2273 | if (!size) | |
2274 | { | |
2275 | fputs ("\t.space\t1\n", file); | |
2276 | /* Check that we've correctly picked up the zero-sized item and placed it | |
2277 | properly. */ | |
2278 | gcc_assert ((!DARWIN_SECTION_ANCHORS || !flag_section_anchors) | |
2279 | || (in_section | |
2280 | && (in_section->common.flags & SECTION_NO_ANCHOR))); | |
2281 | } | |
2282 | } | |
2283 | ||
2284 | /* Darwin storage allocators. | |
2285 | ||
2286 | Zerofill sections are desirable for large blank data since, otherwise, these | |
2287 | data bloat objects (PR33210). | |
2288 | ||
2289 | However, section anchors don't work in .zerofill sections (one cannot switch | |
2290 | to a zerofill section). Ergo, for Darwin targets using section anchors we need | |
2291 | to put (at least some) data into 'normal' switchable sections. | |
2292 | ||
2293 | Here we set a relatively arbitrary value for the size of an object to trigger | |
2294 | zerofill when section anchors are enabled (anything bigger than a page for | |
2295 | current Darwin implementations). FIXME: there ought to be some objective way | |
2296 | to make this choice. | |
2297 | ||
2298 | When section anchor are off this is ignored anyway. */ | |
2299 | ||
2300 | #define BYTES_ZFILL 4096 | |
2301 | ||
2302 | /* Emit a chunk of data for items coalesced by the linker. */ | |
2303 | static void | |
2304 | darwin_emit_weak_or_comdat (FILE *fp, tree decl, const char *name, | |
2305 | unsigned HOST_WIDE_INT size, | |
f199808c | 2306 | bool use_coal, |
8e79e9d4 | 2307 | unsigned int align) |
2308 | { | |
f199808c | 2309 | /* Since the sections used here are coalesced, they will not be eligible |
2310 | for section anchors, and therefore we don't need to break that out. | |
2311 | CHECKME: for modern linker on PowerPC. */ | |
8e79e9d4 | 2312 | if (TREE_READONLY (decl) || TREE_CONSTANT (decl)) |
f199808c | 2313 | switch_to_section (use_coal ? darwin_sections[const_data_coal_section] |
2314 | : darwin_sections[const_data_section]); | |
8e79e9d4 | 2315 | else |
f199808c | 2316 | switch_to_section (use_coal ? darwin_sections[data_coal_section] |
2317 | : data_section); | |
8e79e9d4 | 2318 | |
2319 | /* To be consistent, we'll allow darwin_asm_declare_object_name to assemble | |
2320 | the align info for zero-sized items... but do it here otherwise. */ | |
2321 | if (size && align) | |
2322 | fprintf (fp, "\t.align\t%d\n", floor_log2 (align / BITS_PER_UNIT)); | |
2323 | ||
2324 | if (TREE_PUBLIC (decl)) | |
2325 | darwin_globalize_label (fp, name); | |
2326 | ||
2327 | /* ... and we let it deal with outputting one byte of zero for them too. */ | |
2328 | darwin_asm_declare_object_name (fp, name, decl); | |
2329 | if (size) | |
2330 | assemble_zeros (size); | |
2331 | } | |
2332 | ||
267785bc | 2333 | /* Emit a chunk of data for ObjC meta-data that got placed in BSS erroneously. */ |
2334 | static void | |
2335 | darwin_emit_objc_zeroed (FILE *fp, tree decl, const char *name, | |
2336 | unsigned HOST_WIDE_INT size, | |
2337 | unsigned int align, tree meta) | |
2338 | { | |
2339 | section *ocs = data_section; | |
2340 | ||
2341 | if (TREE_PURPOSE (meta) == get_identifier("OBJC2META")) | |
2342 | ocs = darwin_objc2_section (decl, meta, ocs); | |
2343 | else | |
2344 | ocs = darwin_objc1_section (decl, meta, ocs); | |
2345 | ||
2346 | switch_to_section (ocs); | |
2347 | ||
2348 | /* We shall declare that zero-sized meta-data are not valid (yet). */ | |
2349 | gcc_assert (size); | |
2350 | fprintf (fp, "\t.align\t%d\n", floor_log2 (align / BITS_PER_UNIT)); | |
2351 | ||
2352 | /* ... and we let it deal with outputting one byte of zero for them too. */ | |
2353 | darwin_asm_declare_object_name (fp, name, decl); | |
2354 | assemble_zeros (size); | |
2355 | } | |
2356 | ||
8e79e9d4 | 2357 | /* This routine emits 'local' storage: |
2358 | ||
2359 | When Section Anchors are off this routine emits .zerofill commands in | |
2360 | sections named for their alignment. | |
2361 | ||
2362 | When Section Anchors are on, smaller (non-zero-sized) items are placed in | |
2363 | the .static_data section so that the section anchoring system can see them. | |
2364 | Larger items are still placed in .zerofill sections, addressing PR33210. | |
2365 | The routine has no checking - it is all assumed to be done by the caller. | |
2366 | */ | |
2367 | static void | |
2368 | darwin_emit_local_bss (FILE *fp, tree decl, const char *name, | |
2369 | unsigned HOST_WIDE_INT size, | |
2370 | unsigned int l2align) | |
2371 | { | |
2372 | /* FIXME: We have a fudge to make this work with Java even when the target does | |
2373 | not use sections anchors -- Java seems to need at least one small item in a | |
2374 | non-zerofill segment. */ | |
2375 | if ((DARWIN_SECTION_ANCHORS && flag_section_anchors && size < BYTES_ZFILL) | |
2376 | || (size && size <= 2)) | |
2377 | { | |
2378 | /* Put smaller objects in _static_data, where the section anchors system | |
2379 | can get them. | |
2380 | However, if they are zero-sized punt them to yet a different section | |
2381 | (that is not allowed to participate in anchoring). */ | |
2382 | if (!size) | |
2383 | { | |
2384 | fputs ("\t.section\t__DATA,__zobj_bss\n", fp); | |
2385 | in_section = darwin_sections[zobj_bss_section]; | |
2386 | size = 1; | |
2387 | } | |
2388 | else | |
2389 | { | |
2390 | fputs ("\t.static_data\n", fp); | |
2391 | in_section = darwin_sections[static_data_section]; | |
2392 | } | |
2393 | ||
2394 | if (l2align) | |
2395 | fprintf (fp, "\t.align\t%u\n", l2align); | |
2396 | ||
2397 | assemble_name (fp, name); | |
f03df321 | 2398 | fprintf (fp, ":\n\t.space\t" HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); |
8e79e9d4 | 2399 | } |
2400 | else | |
2401 | { | |
2402 | /* When we are on a non-section anchor target, we can get zero-sized | |
2403 | items here. However, all we need to do is to bump them to one byte | |
2404 | and the section alignment will take care of the rest. */ | |
2405 | char secnam[64]; | |
2406 | unsigned int flags ; | |
2407 | snprintf (secnam, 64, "__DATA,__%sbss%u", ((size)?"":"zo_"), | |
2408 | (unsigned) l2align); | |
2409 | /* We can't anchor (yet, if ever) in zerofill sections, because we can't | |
2410 | switch to them and emit a label. */ | |
2411 | flags = SECTION_BSS|SECTION_WRITE|SECTION_NO_ANCHOR; | |
2412 | in_section = get_section (secnam, flags, NULL); | |
2413 | fprintf (fp, "\t.zerofill %s,", secnam); | |
2414 | assemble_name (fp, name); | |
2415 | if (!size) | |
2416 | size = 1; | |
2417 | ||
2418 | if (l2align) | |
f03df321 | 2419 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", |
8e79e9d4 | 2420 | size, (unsigned) l2align); |
2421 | else | |
f03df321 | 2422 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); |
8e79e9d4 | 2423 | } |
2424 | ||
2425 | (*targetm.encode_section_info) (decl, DECL_RTL (decl), false); | |
2426 | /* This is defined as a file-scope var, so we know to notify machopic. */ | |
2427 | machopic_define_symbol (DECL_RTL (decl)); | |
2428 | } | |
2429 | ||
2430 | /* Emit a chunk of common. */ | |
2431 | static void | |
2432 | darwin_emit_common (FILE *fp, const char *name, | |
2433 | unsigned HOST_WIDE_INT size, unsigned int align) | |
2434 | { | |
2435 | unsigned HOST_WIDE_INT rounded; | |
2436 | unsigned int l2align; | |
427eb138 | 2437 | |
8e79e9d4 | 2438 | /* Earlier systems complain if the alignment exceeds the page size. |
2439 | The magic number is 4096 * 8 - hard-coded for legacy systems. */ | |
2440 | if (!emit_aligned_common && (align > 32768UL)) | |
2441 | align = 4096UL; /* In units. */ | |
2442 | else | |
2443 | align /= BITS_PER_UNIT; | |
2444 | ||
2445 | /* Make sure we have a meaningful align. */ | |
2446 | if (!align) | |
2447 | align = 1; | |
2448 | ||
2449 | /* For earlier toolchains, we need to emit the var as a rounded size to | |
2450 | tell ld the alignment. */ | |
2451 | if (size < align) | |
2452 | rounded = align; | |
2453 | else | |
2454 | rounded = (size + (align-1)) & ~(align-1); | |
2455 | ||
2456 | l2align = floor_log2 (align); | |
2457 | gcc_assert (l2align <= L2_MAX_OFILE_ALIGNMENT); | |
2458 | ||
2459 | in_section = comm_section; | |
2460 | /* We mustn't allow multiple public symbols to share an address when using | |
2461 | the normal OSX toolchain. */ | |
2462 | if (!size) | |
2463 | { | |
2464 | /* Put at least one byte. */ | |
2465 | size = 1; | |
2466 | /* This section can no longer participate in section anchoring. */ | |
2467 | comm_section->common.flags |= SECTION_NO_ANCHOR; | |
2468 | } | |
2469 | ||
2470 | fputs ("\t.comm\t", fp); | |
2471 | assemble_name (fp, name); | |
2472 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED, | |
2473 | emit_aligned_common?size:rounded); | |
2474 | if (l2align && emit_aligned_common) | |
2475 | fprintf (fp, ",%u", l2align); | |
2476 | fputs ("\n", fp); | |
2477 | } | |
2478 | ||
2479 | /* Output a var which is all zero - into aligned BSS sections, common, lcomm | |
2480 | or coalescable data sections (for weak or comdat) as appropriate. */ | |
2481 | ||
2482 | void | |
2483 | darwin_output_aligned_bss (FILE *fp, tree decl, const char *name, | |
2484 | unsigned HOST_WIDE_INT size, unsigned int align) | |
2485 | { | |
2486 | unsigned int l2align; | |
2487 | bool one, pub, weak; | |
267785bc | 2488 | tree meta; |
8e79e9d4 | 2489 | |
2490 | pub = TREE_PUBLIC (decl); | |
2491 | one = DECL_ONE_ONLY (decl); | |
2492 | weak = (DECL_P (decl) | |
2493 | && DECL_WEAK (decl) | |
2494 | && !lookup_attribute ("weak_import", | |
2495 | DECL_ATTRIBUTES (decl))); | |
2496 | ||
2497 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2498 | fprintf (fp, "# albss: %s (%lld,%d) ro %d cst %d stat %d com %d" | |
2499 | " pub %d weak %d one %d init %lx\n", | |
2500 | name, (long long)size, (int)align, TREE_READONLY (decl), | |
2501 | TREE_CONSTANT (decl), TREE_STATIC (decl), DECL_COMMON (decl), | |
2502 | pub, weak, one, (unsigned long)DECL_INITIAL (decl)); | |
2503 | #endif | |
2504 | ||
267785bc | 2505 | /* ObjC metadata can get put in BSS because varasm.c decides it's BSS |
2506 | before the target has a chance to comment. */ | |
2507 | if ((meta = is_objc_metadata (decl))) | |
2508 | { | |
2509 | darwin_emit_objc_zeroed (fp, decl, name, size, DECL_ALIGN (decl), meta); | |
2510 | return; | |
2511 | } | |
2512 | ||
8e79e9d4 | 2513 | /* Check that any initializer is valid. */ |
2514 | gcc_assert ((DECL_INITIAL (decl) == NULL) | |
2515 | || (DECL_INITIAL (decl) == error_mark_node) | |
2516 | || initializer_zerop (DECL_INITIAL (decl))); | |
2517 | ||
2518 | gcc_assert (DECL_SECTION_NAME (decl) == NULL); | |
2519 | gcc_assert (!DECL_COMMON (decl)); | |
2520 | ||
2521 | /* Pick up the correct alignment. */ | |
2522 | if (!size || !align) | |
2523 | align = DECL_ALIGN (decl); | |
2524 | ||
2525 | l2align = floor_log2 (align / BITS_PER_UNIT); | |
2526 | gcc_assert (l2align <= L2_MAX_OFILE_ALIGNMENT); | |
2527 | ||
2528 | last_assemble_variable_decl = decl; | |
2529 | ||
2530 | /* We would rather not have to check this here - but it seems that we might | |
2531 | be passed a decl that should be in coalesced space. */ | |
2532 | if (one || weak) | |
2533 | { | |
a967a7ec | 2534 | /* Weak or COMDAT objects are put in mergeable sections. */ |
8e79e9d4 | 2535 | darwin_emit_weak_or_comdat (fp, decl, name, size, |
f199808c | 2536 | ld_uses_coal_sects, DECL_ALIGN (decl)); |
8e79e9d4 | 2537 | return; |
2538 | } | |
2539 | ||
2540 | /* If this is not public, then emit according to local rules. */ | |
2541 | if (!pub) | |
2542 | { | |
2543 | darwin_emit_local_bss (fp, decl, name, size, l2align); | |
2544 | return; | |
2545 | } | |
2546 | ||
2547 | /* So we have a public symbol (small item fudge for Java, see above). */ | |
2548 | if ((DARWIN_SECTION_ANCHORS && flag_section_anchors && size < BYTES_ZFILL) | |
2549 | || (size && size <= 2)) | |
2550 | { | |
2551 | /* Put smaller objects in data, where the section anchors system can get | |
2552 | them. However, if they are zero-sized punt them to yet a different | |
2553 | section (that is not allowed to participate in anchoring). */ | |
2554 | if (!size) | |
2555 | { | |
2556 | fputs ("\t.section\t__DATA,__zobj_data\n", fp); | |
2557 | in_section = darwin_sections[zobj_data_section]; | |
2558 | size = 1; | |
2559 | } | |
2560 | else | |
2561 | { | |
2562 | fputs ("\t.data\n", fp); | |
2563 | in_section = data_section; | |
2564 | } | |
2565 | ||
2566 | if (l2align) | |
2567 | fprintf (fp, "\t.align\t%u\n", l2align); | |
2568 | ||
2569 | assemble_name (fp, name); | |
f03df321 | 2570 | fprintf (fp, ":\n\t.space\t" HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); |
8e79e9d4 | 2571 | } |
2572 | else | |
2573 | { | |
2574 | char secnam[64]; | |
2575 | unsigned int flags ; | |
2576 | /* When we are on a non-section anchor target, we can get zero-sized | |
2577 | items here. However, all we need to do is to bump them to one byte | |
2578 | and the section alignment will take care of the rest. */ | |
2579 | snprintf (secnam, 64, "__DATA,__%spu_bss%u", ((size)?"":"zo_"), l2align); | |
2580 | ||
2581 | /* We can't anchor in zerofill sections, because we can't switch | |
2582 | to them and emit a label. */ | |
2583 | flags = SECTION_BSS|SECTION_WRITE|SECTION_NO_ANCHOR; | |
2584 | in_section = get_section (secnam, flags, NULL); | |
2585 | fprintf (fp, "\t.zerofill %s,", secnam); | |
2586 | assemble_name (fp, name); | |
2587 | if (!size) | |
2588 | size = 1; | |
2589 | ||
2590 | if (l2align) | |
f03df321 | 2591 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", size, l2align); |
8e79e9d4 | 2592 | else |
f03df321 | 2593 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); |
8e79e9d4 | 2594 | } |
2595 | (* targetm.encode_section_info) (decl, DECL_RTL (decl), false); | |
2596 | } | |
2597 | ||
2598 | /* Output a chunk of common, with alignment specified (where the target | |
2599 | supports this). */ | |
2600 | void | |
2601 | darwin_asm_output_aligned_decl_common (FILE *fp, tree decl, const char *name, | |
2602 | unsigned HOST_WIDE_INT size, | |
2603 | unsigned int align) | |
2604 | { | |
2605 | unsigned int l2align; | |
2606 | bool one, weak; | |
267785bc | 2607 | tree meta; |
2608 | ||
8e79e9d4 | 2609 | /* No corresponding var. */ |
2610 | if (decl==NULL) | |
2611 | { | |
2612 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2613 | fprintf (fp, "# adcom: %s (%d,%d) decl=0x0\n", name, (int)size, (int)align); | |
2614 | #endif | |
2615 | darwin_emit_common (fp, name, size, align); | |
2616 | return; | |
2617 | } | |
2618 | ||
2619 | one = DECL_ONE_ONLY (decl); | |
2620 | weak = (DECL_P (decl) | |
2621 | && DECL_WEAK (decl) | |
2622 | && !lookup_attribute ("weak_import", | |
2623 | DECL_ATTRIBUTES (decl))); | |
2624 | ||
2625 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2626 | fprintf (fp, "# adcom: %s (%lld,%d) ro %d cst %d stat %d com %d pub %d" | |
2627 | " weak %d one %d init %lx\n", | |
2628 | name, (long long)size, (int)align, TREE_READONLY (decl), | |
2629 | TREE_CONSTANT (decl), TREE_STATIC (decl), DECL_COMMON (decl), | |
2630 | TREE_PUBLIC (decl), weak, one, (unsigned long)DECL_INITIAL (decl)); | |
2631 | #endif | |
2632 | ||
267785bc | 2633 | /* ObjC metadata can get put in BSS because varasm.c decides it's BSS |
2634 | before the target has a chance to comment. */ | |
2635 | if ((meta = is_objc_metadata (decl))) | |
2636 | { | |
2637 | darwin_emit_objc_zeroed (fp, decl, name, size, DECL_ALIGN (decl), meta); | |
2638 | return; | |
2639 | } | |
2640 | ||
8e79e9d4 | 2641 | /* We shouldn't be messing with this if the decl has a section name. */ |
2642 | gcc_assert (DECL_SECTION_NAME (decl) == NULL); | |
2643 | ||
2644 | /* We would rather not have to check this here - but it seems that we might | |
2645 | be passed a decl that should be in coalesced space. */ | |
2646 | if (one || weak) | |
2647 | { | |
2648 | /* Weak or COMDAT objects are put in mergable sections. */ | |
2649 | darwin_emit_weak_or_comdat (fp, decl, name, size, | |
f199808c | 2650 | ld_uses_coal_sects, DECL_ALIGN (decl)); |
8e79e9d4 | 2651 | return; |
2652 | } | |
2653 | ||
2654 | /* We should only get here for DECL_COMMON, with a zero init (and, in | |
2655 | principle, only for public symbols too - although we deal with local | |
2656 | ones below). */ | |
2657 | ||
2658 | /* Check the initializer is OK. */ | |
2659 | gcc_assert (DECL_COMMON (decl) | |
2660 | && ((DECL_INITIAL (decl) == NULL) | |
2661 | || (DECL_INITIAL (decl) == error_mark_node) | |
2662 | || initializer_zerop (DECL_INITIAL (decl)))); | |
2663 | ||
2664 | last_assemble_variable_decl = decl; | |
2665 | ||
2666 | if (!size || !align) | |
2667 | align = DECL_ALIGN (decl); | |
2668 | ||
2669 | l2align = floor_log2 (align / BITS_PER_UNIT); | |
2670 | /* Check we aren't asking for more aligment than the platform allows. */ | |
2671 | gcc_assert (l2align <= L2_MAX_OFILE_ALIGNMENT); | |
2672 | ||
2673 | if (TREE_PUBLIC (decl) != 0) | |
2674 | darwin_emit_common (fp, name, size, align); | |
2675 | else | |
2676 | darwin_emit_local_bss (fp, decl, name, size, l2align); | |
2677 | } | |
2678 | ||
2679 | /* Output a chunk of BSS with alignment specfied. */ | |
2680 | void | |
2681 | darwin_asm_output_aligned_decl_local (FILE *fp, tree decl, const char *name, | |
2682 | unsigned HOST_WIDE_INT size, | |
2683 | unsigned int align) | |
2684 | { | |
2685 | unsigned long l2align; | |
2686 | bool one, weak; | |
267785bc | 2687 | tree meta; |
8e79e9d4 | 2688 | |
2689 | one = DECL_ONE_ONLY (decl); | |
2690 | weak = (DECL_P (decl) | |
2691 | && DECL_WEAK (decl) | |
2692 | && !lookup_attribute ("weak_import", | |
2693 | DECL_ATTRIBUTES (decl))); | |
2694 | ||
2695 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2696 | fprintf (fp, "# adloc: %s (%lld,%d) ro %d cst %d stat %d one %d pub %d" | |
2697 | " weak %d init %lx\n", | |
2698 | name, (long long)size, (int)align, TREE_READONLY (decl), | |
2699 | TREE_CONSTANT (decl), TREE_STATIC (decl), one, TREE_PUBLIC (decl), | |
2700 | weak , (unsigned long)DECL_INITIAL (decl)); | |
2701 | #endif | |
2702 | ||
267785bc | 2703 | /* ObjC metadata can get put in BSS because varasm.c decides it's BSS |
2704 | before the target has a chance to comment. */ | |
2705 | if ((meta = is_objc_metadata (decl))) | |
2706 | { | |
2707 | darwin_emit_objc_zeroed (fp, decl, name, size, DECL_ALIGN (decl), meta); | |
2708 | return; | |
2709 | } | |
2710 | ||
8e79e9d4 | 2711 | /* We shouldn't be messing with this if the decl has a section name. */ |
2712 | gcc_assert (DECL_SECTION_NAME (decl) == NULL); | |
2713 | ||
2714 | /* We would rather not have to check this here - but it seems that we might | |
2715 | be passed a decl that should be in coalesced space. */ | |
2716 | if (one || weak) | |
2717 | { | |
2718 | /* Weak or COMDAT objects are put in mergable sections. */ | |
2719 | darwin_emit_weak_or_comdat (fp, decl, name, size, | |
f199808c | 2720 | ld_uses_coal_sects, DECL_ALIGN (decl)); |
8e79e9d4 | 2721 | return; |
2722 | } | |
2723 | ||
2724 | /* .. and it should be suitable for placement in local mem. */ | |
2725 | gcc_assert(!TREE_PUBLIC (decl) && !DECL_COMMON (decl)); | |
2726 | /* .. and any initializer must be all-zero. */ | |
2727 | gcc_assert ((DECL_INITIAL (decl) == NULL) | |
2728 | || (DECL_INITIAL (decl) == error_mark_node) | |
2729 | || initializer_zerop (DECL_INITIAL (decl))); | |
2730 | ||
2731 | last_assemble_variable_decl = decl; | |
2732 | ||
2733 | if (!size || !align) | |
2734 | align = DECL_ALIGN (decl); | |
2735 | ||
2736 | l2align = floor_log2 (align / BITS_PER_UNIT); | |
2737 | gcc_assert (l2align <= L2_MAX_OFILE_ALIGNMENT); | |
2738 | ||
2739 | darwin_emit_local_bss (fp, decl, name, size, l2align); | |
427eb138 | 2740 | } |
2741 | ||
2c5b6111 | 2742 | /* Emit an assembler directive to set visibility for a symbol. The |
2743 | only supported visibilities are VISIBILITY_DEFAULT and | |
2744 | VISIBILITY_HIDDEN; the latter corresponds to Darwin's "private | |
2745 | extern". There is no MACH-O equivalent of ELF's | |
2746 | VISIBILITY_INTERNAL or VISIBILITY_PROTECTED. */ | |
2747 | ||
b215c058 | 2748 | void |
2c5b6111 | 2749 | darwin_assemble_visibility (tree decl, int vis) |
2750 | { | |
2751 | if (vis == VISIBILITY_DEFAULT) | |
2752 | ; | |
a115dd2c | 2753 | else if (vis == VISIBILITY_HIDDEN || vis == VISIBILITY_INTERNAL) |
2c5b6111 | 2754 | { |
2755 | fputs ("\t.private_extern ", asm_out_file); | |
2756 | assemble_name (asm_out_file, | |
2757 | (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)))); | |
2758 | fputs ("\n", asm_out_file); | |
2759 | } | |
2760 | else | |
a115dd2c | 2761 | warning (OPT_Wattributes, "protected visibility attribute " |
9b2d6d13 | 2762 | "not supported in this configuration; ignored"); |
2c5b6111 | 2763 | } |
2764 | ||
f1f41a6c | 2765 | /* vec used by darwin_asm_dwarf_section. |
edea89b9 | 2766 | Maybe a hash tab would be better here - but the intention is that this is |
2767 | a very short list (fewer than 16 items) and each entry should (ideally, | |
2768 | eventually) only be presented once. | |
2769 | ||
2770 | A structure to hold a dwarf debug section used entry. */ | |
2771 | ||
2772 | typedef struct GTY(()) dwarf_sect_used_entry { | |
2773 | const char *name; | |
2774 | unsigned count; | |
2775 | } | |
2776 | dwarf_sect_used_entry; | |
2777 | ||
edea89b9 | 2778 | |
2779 | /* A list of used __DWARF sections. */ | |
f1f41a6c | 2780 | static GTY (()) vec<dwarf_sect_used_entry, va_gc> *dwarf_sect_names_table; |
edea89b9 | 2781 | |
2782 | /* This is called when we are asked to assemble a named section and the | |
2783 | name begins with __DWARF,. We keep a list of the section names (without | |
2784 | the __DWARF, prefix) and use this to emit our required start label on the | |
2785 | first switch to each section. */ | |
2786 | ||
2787 | static void | |
2788 | darwin_asm_dwarf_section (const char *name, unsigned int flags, | |
7b53e714 | 2789 | tree ARG_UNUSED (decl), bool is_for_lto) |
edea89b9 | 2790 | { |
2791 | unsigned i; | |
7b53e714 | 2792 | int namelen, extra = 0; |
2793 | const char *sect, *lto_add = ""; | |
2794 | char sname[64]; | |
edea89b9 | 2795 | dwarf_sect_used_entry *ref; |
2796 | bool found = false; | |
7b53e714 | 2797 | |
2798 | gcc_checking_assert ((flags & (SECTION_DEBUG | SECTION_NAMED)) | |
2799 | == (SECTION_DEBUG | SECTION_NAMED)); | |
2800 | ||
2801 | /* We know that the name starts with __DWARF, or __GNU_DAWRF_LTO */ | |
2802 | sect = strchr (name, ',') + 1; | |
2803 | namelen = strchr (sect, ',') - sect; | |
2804 | gcc_checking_assert (namelen); | |
2805 | ||
2806 | /* The section switch is output as written... */ | |
2807 | fprintf (asm_out_file, "\t.section %s\n", name); | |
2808 | ||
2809 | /* ... but the string we keep to make section start labels needs | |
2810 | adjustment for lto cases. */ | |
2811 | if (is_for_lto) | |
2812 | { | |
2813 | lto_add = "_lto"; | |
2814 | extra = 4; | |
2815 | } | |
2816 | ||
2817 | snprintf (sname, 64, "%.*s%.*s", namelen, sect, extra, lto_add); | |
2818 | namelen += extra; | |
2819 | ||
edea89b9 | 2820 | if (dwarf_sect_names_table == NULL) |
f1f41a6c | 2821 | vec_alloc (dwarf_sect_names_table, 16); |
edea89b9 | 2822 | else |
2823 | for (i = 0; | |
f1f41a6c | 2824 | dwarf_sect_names_table->iterate (i, &ref); |
edea89b9 | 2825 | i++) |
2826 | { | |
2827 | if (!ref) | |
2828 | break; | |
2829 | if (!strcmp (ref->name, sname)) | |
2830 | { | |
2831 | found = true; | |
2832 | ref->count++; | |
2833 | break; | |
2834 | } | |
2835 | } | |
2836 | ||
edea89b9 | 2837 | if (!found) |
2838 | { | |
2839 | dwarf_sect_used_entry e; | |
2840 | fprintf (asm_out_file, "Lsection%.*s:\n", namelen, sname); | |
2841 | e.count = 1; | |
2842 | e.name = xstrdup (sname); | |
f1f41a6c | 2843 | vec_safe_push (dwarf_sect_names_table, e); |
edea89b9 | 2844 | } |
2845 | } | |
2846 | ||
a08b74c8 | 2847 | /* Output a difference of two labels that will be an assembly time |
2848 | constant if the two labels are local. (.long lab1-lab2 will be | |
2849 | very different if lab1 is at the boundary between two sections; it | |
2850 | will be relocated according to the second section, not the first, | |
2851 | so one ends up with a difference between labels in different | |
2852 | sections, which is bad in the dwarf2 eh context for instance.) */ | |
2853 | ||
2854 | static int darwin_dwarf_label_counter; | |
2855 | ||
2856 | void | |
85d3e3b5 | 2857 | darwin_asm_output_dwarf_delta (FILE *file, int size, |
e1719e76 | 2858 | const char *lab1, const char *lab2, |
2859 | HOST_WIDE_INT offset) | |
a08b74c8 | 2860 | { |
2f9fc8ef | 2861 | int islocaldiff = (lab1[0] == '*' && lab1[1] == 'L' |
2862 | && lab2[0] == '*' && lab2[1] == 'L'); | |
dcf3c3f7 | 2863 | const char *directive = (size == 8 ? ".quad" : ".long"); |
a08b74c8 | 2864 | |
2865 | if (islocaldiff) | |
2866 | fprintf (file, "\t.set L$set$%d,", darwin_dwarf_label_counter); | |
2867 | else | |
85d3e3b5 | 2868 | fprintf (file, "\t%s\t", directive); |
8e79e9d4 | 2869 | |
48126f0c | 2870 | assemble_name_raw (file, lab1); |
a08b74c8 | 2871 | fprintf (file, "-"); |
48126f0c | 2872 | assemble_name_raw (file, lab2); |
e1719e76 | 2873 | if (offset != 0) |
2874 | fprintf (file, "+" HOST_WIDE_INT_PRINT_DEC, offset); | |
a08b74c8 | 2875 | if (islocaldiff) |
85d3e3b5 | 2876 | fprintf (file, "\n\t%s L$set$%d", directive, darwin_dwarf_label_counter++); |
a08b74c8 | 2877 | } |
d08d29c0 | 2878 | |
d08d29c0 | 2879 | /* Output an offset in a DWARF section on Darwin. On Darwin, DWARF section |
2880 | offsets are not represented using relocs in .o files; either the | |
2881 | section never leaves the .o file, or the linker or other tool is | |
2882 | responsible for parsing the DWARF and updating the offsets. */ | |
2883 | ||
2884 | void | |
2885 | darwin_asm_output_dwarf_offset (FILE *file, int size, const char * lab, | |
e1719e76 | 2886 | HOST_WIDE_INT offset, section *base) |
d08d29c0 | 2887 | { |
2888 | char sname[64]; | |
7b53e714 | 2889 | int namelen, extra = 0; |
2890 | bool is_for_lto; | |
2891 | const char *lto_add = ""; | |
2892 | ||
2893 | gcc_checking_assert (base->common.flags & SECTION_NAMED); | |
2894 | is_for_lto = strncmp (base->named.name, "__GNU_DWARF_LTO,", 16) == 0; | |
2895 | gcc_checking_assert (is_for_lto | |
2896 | || strncmp (base->named.name, "__DWARF,", 8) == 0); | |
2897 | const char *name = strchr (base->named.name, ',') + 1; | |
2898 | gcc_checking_assert (name); | |
2899 | ||
2900 | namelen = strchr (name, ',') - (name); | |
2901 | if (is_for_lto) | |
2902 | { | |
2903 | lto_add = "_lto"; | |
2904 | extra = 4; | |
2905 | } | |
2906 | snprintf (sname, 64, "*Lsection%.*s%.*s", namelen, name, extra, lto_add); | |
e1719e76 | 2907 | darwin_asm_output_dwarf_delta (file, size, lab, sname, offset); |
d08d29c0 | 2908 | } |
a08b74c8 | 2909 | |
13e2f0a0 | 2910 | /* Called from the within the TARGET_ASM_FILE_START for each target. */ |
edea89b9 | 2911 | |
2912 | void | |
2913 | darwin_file_start (void) | |
2914 | { | |
13e2f0a0 | 2915 | /* Nothing to do. */ |
edea89b9 | 2916 | } |
2917 | ||
2918 | /* Called for the TARGET_ASM_FILE_END hook. | |
2919 | Emit the mach-o pic indirection data, the lto data and, finally a flag | |
2920 | to tell the linker that it can break the file object into sections and | |
2921 | move those around for efficiency. */ | |
2922 | ||
f6940372 | 2923 | void |
b40da9a7 | 2924 | darwin_file_end (void) |
f6940372 | 2925 | { |
4b313269 | 2926 | if (!vec_safe_is_empty (ctors)) |
ed161dab | 2927 | finalize_ctors (); |
2928 | if (!vec_safe_is_empty (dtors)) | |
2929 | finalize_dtors (); | |
236ce1d1 | 2930 | |
2931 | /* If we are expecting to output NeXT ObjC meta-data, (and we actually see | |
2932 | some) then we output the fix-and-continue marker (Image Info). | |
2933 | This applies to Objective C, Objective C++ and LTO with either language | |
2934 | as part of the input. */ | |
2935 | if (flag_next_runtime && objc_metadata_seen) | |
2936 | { | |
2937 | unsigned int flags = 0; | |
2938 | if (flag_objc_abi >= 2) | |
2939 | { | |
2940 | flags = 16; | |
2941 | output_section_asm_op | |
2942 | (darwin_sections[objc2_image_info_section]->unnamed.data); | |
2943 | } | |
2944 | else | |
2945 | output_section_asm_op | |
2946 | (darwin_sections[objc_image_info_section]->unnamed.data); | |
2947 | ||
2948 | ASM_OUTPUT_ALIGN (asm_out_file, 2); | |
2949 | fputs ("L_OBJC_ImageInfo:\n", asm_out_file); | |
2950 | ||
2951 | flags |= (flag_replace_objc_classes && classes_seen) ? 1 : 0; | |
2952 | flags |= flag_objc_gc ? 2 : 0; | |
2953 | ||
2954 | fprintf (asm_out_file, "\t.long\t0\n\t.long\t%u\n", flags); | |
2955 | } | |
2956 | ||
f6940372 | 2957 | machopic_finish (asm_out_file); |
3a4a2292 | 2958 | if (lang_GNU_CXX ()) |
f6940372 | 2959 | { |
92e4ba7d | 2960 | switch_to_section (darwin_sections[constructor_section]); |
2961 | switch_to_section (darwin_sections[destructor_section]); | |
f6940372 | 2962 | ASM_OUTPUT_ALIGN (asm_out_file, 1); |
2963 | } | |
23433d72 | 2964 | |
2965 | /* If there was LTO assembler output, append it to asm_out_file. */ | |
2966 | if (lto_asm_out_name) | |
2967 | { | |
2968 | int n; | |
2969 | char *buf, *lto_asm_txt; | |
2970 | ||
2971 | /* Shouldn't be here if we failed to switch back. */ | |
2972 | gcc_assert (! saved_asm_out_file); | |
2973 | ||
2974 | lto_asm_out_file = fopen (lto_asm_out_name, "r"); | |
2975 | if (lto_asm_out_file == NULL) | |
c05be867 | 2976 | fatal_error (input_location, |
2977 | "failed to open temporary file %s with LTO output", | |
23433d72 | 2978 | lto_asm_out_name); |
2979 | fseek (lto_asm_out_file, 0, SEEK_END); | |
2980 | n = ftell (lto_asm_out_file); | |
2981 | if (n > 0) | |
2982 | { | |
2983 | fseek (lto_asm_out_file, 0, SEEK_SET); | |
2984 | lto_asm_txt = buf = (char *) xmalloc (n + 1); | |
2985 | while (fgets (lto_asm_txt, n, lto_asm_out_file)) | |
2986 | fputs (lto_asm_txt, asm_out_file); | |
13e2f0a0 | 2987 | /* Put a termination label. */ |
2988 | fprintf (asm_out_file, "\t.section %s,%s,regular,debug\n", | |
2989 | LTO_SEGMENT_NAME, LTO_SECTS_SECTION); | |
2990 | fprintf (asm_out_file, "L_GNU_LTO%d:\t;# end of lto\n", | |
2991 | lto_section_num); | |
2992 | /* Make sure our termination label stays in this section. */ | |
2993 | fputs ("\t.space\t1\n", asm_out_file); | |
23433d72 | 2994 | } |
2995 | ||
2996 | /* Remove the temporary file. */ | |
2997 | fclose (lto_asm_out_file); | |
2998 | unlink_if_ordinary (lto_asm_out_name); | |
2999 | free (lto_asm_out_name); | |
3000 | } | |
3001 | ||
13e2f0a0 | 3002 | /* Output the names and indices. */ |
f1f41a6c | 3003 | if (lto_section_names && lto_section_names->length ()) |
23433d72 | 3004 | { |
13e2f0a0 | 3005 | int count; |
3006 | darwin_lto_section_e *ref; | |
3007 | /* For now, we'll make the offsets 4 bytes and unaligned - we'll fix | |
3008 | the latter up ourselves. */ | |
3009 | const char *op = integer_asm_op (4,0); | |
3010 | ||
3011 | /* Emit the names. */ | |
3012 | fprintf (asm_out_file, "\t.section %s,%s,regular,debug\n", | |
23433d72 | 3013 | LTO_SEGMENT_NAME, LTO_NAMES_SECTION); |
f1f41a6c | 3014 | FOR_EACH_VEC_ELT (*lto_section_names, count, ref) |
13e2f0a0 | 3015 | { |
3016 | fprintf (asm_out_file, "L_GNU_LTO_NAME%d:\n", count); | |
3017 | /* We have to jump through hoops to get the values of the intra-section | |
3018 | offsets... */ | |
3019 | fprintf (asm_out_file, | |
3020 | "\t.set L$gnu$lto$noff%d,L_GNU_LTO_NAME%d-L_GNU_LTO_NAME0\n", | |
3021 | count, count); | |
3022 | fprintf (asm_out_file, | |
3023 | "\t.set L$gnu$lto$nsiz%d,L_GNU_LTO_NAME%d-L_GNU_LTO_NAME%d\n", | |
3024 | count, count+1, count); | |
3025 | fprintf (asm_out_file, "\t.asciz\t\"%s\"\n", ref->sectname); | |
3026 | } | |
3027 | fprintf (asm_out_file, "L_GNU_LTO_NAME%d:\t;# end\n", lto_section_num); | |
3028 | /* make sure our termination label stays in this section. */ | |
3029 | fputs ("\t.space\t1\n", asm_out_file); | |
3030 | ||
3031 | /* Emit the Index. */ | |
3032 | fprintf (asm_out_file, "\t.section %s,%s,regular,debug\n", | |
3033 | LTO_SEGMENT_NAME, LTO_INDEX_SECTION); | |
3034 | fputs ("\t.align\t2\n", asm_out_file); | |
3035 | fputs ("# Section offset, Section length, Name offset, Name length\n", | |
3036 | asm_out_file); | |
f1f41a6c | 3037 | FOR_EACH_VEC_ELT (*lto_section_names, count, ref) |
13e2f0a0 | 3038 | { |
3039 | fprintf (asm_out_file, "%s L$gnu$lto$offs%d\t;# %s\n", | |
3040 | op, count, ref->sectname); | |
3041 | fprintf (asm_out_file, "%s L$gnu$lto$size%d\n", op, count); | |
3042 | fprintf (asm_out_file, "%s L$gnu$lto$noff%d\n", op, count); | |
3043 | fprintf (asm_out_file, "%s L$gnu$lto$nsiz%d\n", op, count); | |
3044 | } | |
23433d72 | 3045 | } |
23433d72 | 3046 | |
8e79e9d4 | 3047 | /* If we have section anchors, then we must prevent the linker from |
3048 | re-arranging data. */ | |
3049 | if (!DARWIN_SECTION_ANCHORS || !flag_section_anchors) | |
3050 | fprintf (asm_out_file, "\t.subsections_via_symbols\n"); | |
f6940372 | 3051 | } |
3052 | ||
5b182752 | 3053 | /* TODO: Add a language hook for identifying if a decl is a vtable. */ |
3054 | #define DARWIN_VTABLE_P(DECL) 0 | |
3055 | ||
0765d519 | 3056 | /* Cross-module name binding. Darwin does not support overriding |
5b182752 | 3057 | functions at dynamic-link time, except for vtables in kexts. */ |
0765d519 | 3058 | |
3059 | bool | |
a9f1838b | 3060 | darwin_binds_local_p (const_tree decl) |
0765d519 | 3061 | { |
5b182752 | 3062 | return default_binds_local_p_1 (decl, |
3063 | TARGET_KEXTABI && DARWIN_VTABLE_P (decl)); | |
0765d519 | 3064 | } |
3065 | ||
8c27005f | 3066 | /* The Darwin's implementation of TARGET_ASM_OUTPUT_ANCHOR. Define the |
3067 | anchor relative to ".", the current section position. We cannot use | |
3068 | the default one because ASM_OUTPUT_DEF is wrong for Darwin. */ | |
8c27005f | 3069 | void |
3070 | darwin_asm_output_anchor (rtx symbol) | |
3071 | { | |
3072 | fprintf (asm_out_file, "\t.set\t"); | |
3073 | assemble_name (asm_out_file, XSTR (symbol, 0)); | |
3074 | fprintf (asm_out_file, ", . + " HOST_WIDE_INT_PRINT_DEC "\n", | |
3075 | SYMBOL_REF_BLOCK_OFFSET (symbol)); | |
3076 | } | |
8e79e9d4 | 3077 | |
8b1fba2c | 3078 | /* Disable section anchoring on any section containing a zero-sized |
8e79e9d4 | 3079 | object. */ |
3080 | bool | |
3081 | darwin_use_anchors_for_symbol_p (const_rtx symbol) | |
3082 | { | |
8b1fba2c | 3083 | if (DARWIN_SECTION_ANCHORS && flag_section_anchors) |
8e79e9d4 | 3084 | { |
3085 | section *sect; | |
3086 | /* If the section contains a zero-sized object it's ineligible. */ | |
3087 | sect = SYMBOL_REF_BLOCK (symbol)->sect; | |
3088 | /* This should have the effect of disabling anchors for vars that follow | |
8b1fba2c | 3089 | any zero-sized one, in a given section. */ |
8e79e9d4 | 3090 | if (sect->common.flags & SECTION_NO_ANCHOR) |
3091 | return false; | |
3092 | ||
8b1fba2c | 3093 | /* Also check the normal reasons for suppressing. */ |
3094 | return default_use_anchors_for_symbol_p (symbol); | |
8e79e9d4 | 3095 | } |
3096 | else | |
3097 | return false; | |
3098 | } | |
8c27005f | 3099 | |
f720b7c6 | 3100 | /* Set the darwin specific attributes on TYPE. */ |
3101 | void | |
3102 | darwin_set_default_type_attributes (tree type) | |
3103 | { | |
3104 | if (darwin_ms_struct | |
3105 | && TREE_CODE (type) == RECORD_TYPE) | |
3106 | TYPE_ATTRIBUTES (type) = tree_cons (get_identifier ("ms_struct"), | |
3107 | NULL_TREE, | |
3108 | TYPE_ATTRIBUTES (type)); | |
3109 | } | |
3110 | ||
26ac986e | 3111 | /* True, iff we're generating code for loadable kernel extensions. */ |
5b182752 | 3112 | |
3113 | bool | |
3114 | darwin_kextabi_p (void) { | |
3115 | return flag_apple_kext; | |
3116 | } | |
3117 | ||
3118 | void | |
3119 | darwin_override_options (void) | |
3120 | { | |
9e09909d | 3121 | /* Keep track of which (major) version we're generating code for. */ |
3122 | if (darwin_macosx_version_min) | |
3123 | { | |
3124 | if (strverscmp (darwin_macosx_version_min, "10.6") >= 0) | |
3125 | generating_for_darwin_version = 10; | |
3126 | else if (strverscmp (darwin_macosx_version_min, "10.5") >= 0) | |
3127 | generating_for_darwin_version = 9; | |
3128 | ||
3129 | /* Earlier versions are not specifically accounted, until required. */ | |
3130 | } | |
8e79e9d4 | 3131 | |
f199808c | 3132 | /* Older Darwin ld could not coalesce weak entities without them being |
3133 | placed in special sections. */ | |
3134 | if (darwin_target_linker | |
3135 | && (strverscmp (darwin_target_linker, MIN_LD64_NO_COAL_SECTS) < 0)) | |
3136 | ld_uses_coal_sects = true; | |
3137 | ||
3f3d5ad4 | 3138 | /* In principle, this should be c-family only. However, we really need to |
3139 | set sensible defaults for LTO as well, since the section selection stuff | |
3140 | should check for correctness re. the ABI. TODO: check and provide the | |
3141 | flags (runtime & ABI) from the lto wrapper). */ | |
3142 | ||
3143 | /* Unless set, force ABI=2 for NeXT and m64, 0 otherwise. */ | |
3144 | if (!global_options_set.x_flag_objc_abi) | |
3145 | global_options.x_flag_objc_abi | |
3146 | = (!flag_next_runtime) | |
3147 | ? 0 | |
3148 | : (TARGET_64BIT ? 2 | |
3149 | : (generating_for_darwin_version >= 9) ? 1 | |
3150 | : 0); | |
3151 | ||
3152 | /* Objective-C family ABI 2 is only valid for next/m64 at present. */ | |
3153 | if (global_options_set.x_flag_objc_abi && flag_next_runtime) | |
3154 | { | |
3155 | if (TARGET_64BIT && global_options.x_flag_objc_abi < 2) | |
3156 | error_at (UNKNOWN_LOCATION, "%<-fobjc-abi-version%> >= 2 must be" | |
3157 | " used for %<-m64%> targets with" | |
3158 | " %<-fnext-runtime%>"); | |
3159 | if (!TARGET_64BIT && global_options.x_flag_objc_abi >= 2) | |
3160 | error_at (UNKNOWN_LOCATION, "%<-fobjc-abi-version%> >= 2 is not" | |
3161 | " supported on %<-m32%> targets with" | |
3162 | " %<-fnext-runtime%>"); | |
3163 | } | |
3164 | ||
024fa7dd | 3165 | /* Don't emit DWARF3/4 unless specifically selected. This is a |
3166 | workaround for tool bugs. */ | |
8e79e9d4 | 3167 | if (!global_options_set.x_dwarf_strict) |
024fa7dd | 3168 | dwarf_strict = 1; |
052166fd | 3169 | if (!global_options_set.x_dwarf_version) |
3170 | dwarf_version = 2; | |
024fa7dd | 3171 | |
8284d341 | 3172 | if (global_options_set.x_dwarf_split_debug_info) |
3173 | { | |
3174 | inform (input_location, | |
3175 | "-gsplit-dwarf is not supported on this platform, ignored"); | |
3176 | dwarf_split_debug_info = 0; | |
3177 | global_options_set.x_dwarf_split_debug_info = 0; | |
3178 | } | |
3179 | ||
9e09909d | 3180 | /* Do not allow unwind tables to be generated by default for m32. |
3181 | fnon-call-exceptions will override this, regardless of what we do. */ | |
3182 | if (generating_for_darwin_version < 10 | |
3183 | && !global_options_set.x_flag_asynchronous_unwind_tables | |
3184 | && !TARGET_64BIT) | |
3185 | global_options.x_flag_asynchronous_unwind_tables = 0; | |
3186 | ||
5886e9ab | 3187 | /* Disable -freorder-blocks-and-partition when unwind tables are being |
3188 | emitted for Darwin < 9 (OSX 10.5). | |
3189 | The strategy is, "Unless the User has specifically set/unset an unwind | |
3190 | flag we will switch off -freorder-blocks-and-partition when unwind tables | |
3191 | will be generated". If the User specifically sets flags... we assume | |
3192 | (s)he knows why... */ | |
3b3edcd4 | 3193 | if (generating_for_darwin_version < 9 |
9e09909d | 3194 | && global_options_set.x_flag_reorder_blocks_and_partition |
3195 | && ((global_options.x_flag_exceptions /* User, c++, java */ | |
3196 | && !global_options_set.x_flag_exceptions) /* User specified... */ | |
3197 | || (global_options.x_flag_unwind_tables | |
5886e9ab | 3198 | && !global_options_set.x_flag_unwind_tables) |
9e09909d | 3199 | || (global_options.x_flag_non_call_exceptions |
5886e9ab | 3200 | && !global_options_set.x_flag_non_call_exceptions) |
9e09909d | 3201 | || (global_options.x_flag_asynchronous_unwind_tables |
5886e9ab | 3202 | && !global_options_set.x_flag_asynchronous_unwind_tables))) |
3203 | { | |
3204 | inform (input_location, | |
3205 | "-freorder-blocks-and-partition does not work with exceptions " | |
3206 | "on this architecture"); | |
3207 | flag_reorder_blocks_and_partition = 0; | |
3208 | flag_reorder_blocks = 1; | |
3209 | } | |
14325167 | 3210 | |
c60ecc90 | 3211 | /* FIXME: flag_objc_sjlj_exceptions is no longer needed since there is only |
3212 | one valid choice of exception scheme for each runtime. */ | |
3213 | if (!global_options_set.x_flag_objc_sjlj_exceptions) | |
3214 | global_options.x_flag_objc_sjlj_exceptions = | |
3215 | flag_next_runtime && !TARGET_64BIT; | |
3216 | ||
3217 | /* FIXME: and this could be eliminated then too. */ | |
3218 | if (!global_options_set.x_flag_exceptions | |
3219 | && flag_objc_exceptions | |
3220 | && TARGET_64BIT) | |
3221 | flag_exceptions = 1; | |
3222 | ||
5b182752 | 3223 | if (flag_mkernel || flag_apple_kext) |
3224 | { | |
3225 | /* -mkernel implies -fapple-kext for C++ */ | |
3a4a2292 | 3226 | if (lang_GNU_CXX ()) |
5b182752 | 3227 | flag_apple_kext = 1; |
3228 | ||
3229 | flag_no_common = 1; | |
3230 | ||
3231 | /* No EH in kexts. */ | |
3232 | flag_exceptions = 0; | |
3233 | /* No -fnon-call-exceptions data in kexts. */ | |
3234 | flag_non_call_exceptions = 0; | |
8e79e9d4 | 3235 | /* so no tables either.. */ |
3236 | flag_unwind_tables = 0; | |
3237 | flag_asynchronous_unwind_tables = 0; | |
3cf7ab3b | 3238 | /* We still need to emit branch islands for kernel context. */ |
3239 | darwin_emit_branch_islands = true; | |
5b182752 | 3240 | } |
8e79e9d4 | 3241 | |
3e1cce93 | 3242 | if (flag_var_tracking_uninit == 0 |
f067760b | 3243 | && generating_for_darwin_version >= 9 |
3244 | && (flag_gtoggle ? (debug_info_level == DINFO_LEVEL_NONE) | |
3245 | : (debug_info_level >= DINFO_LEVEL_NORMAL)) | |
3246 | && write_symbols == DWARF2_DEBUG) | |
3e1cce93 | 3247 | flag_var_tracking_uninit = flag_var_tracking; |
3cf7ab3b | 3248 | |
90ff10b3 | 3249 | if (MACHO_DYNAMIC_NO_PIC_P) |
3250 | { | |
3251 | if (flag_pic) | |
b7d1dec3 | 3252 | warning_at (UNKNOWN_LOCATION, 0, |
3253 | "%<-mdynamic-no-pic%> overrides %<-fpic%>, %<-fPIC%>," | |
3254 | " %<-fpie%> or %<-fPIE%>"); | |
90ff10b3 | 3255 | flag_pic = 0; |
3256 | } | |
3257 | else if (flag_pic == 1) | |
3258 | { | |
3259 | /* Darwin's -fpic is -fPIC. */ | |
3260 | flag_pic = 2; | |
3261 | } | |
3262 | ||
3cf7ab3b | 3263 | /* It is assumed that branch island stubs are needed for earlier systems. */ |
9e09909d | 3264 | if (generating_for_darwin_version < 9) |
3cf7ab3b | 3265 | darwin_emit_branch_islands = true; |
8e79e9d4 | 3266 | else |
3267 | emit_aligned_common = true; /* Later systems can support aligned common. */ | |
d4238e8b | 3268 | |
3269 | /* The c_dialect...() macros are not available to us here. */ | |
3270 | darwin_running_cxx = (strstr (lang_hooks.name, "C++") != 0); | |
5b182752 | 3271 | } |
3272 | ||
8158aa7e | 3273 | #if DARWIN_PPC |
3274 | /* Add $LDBL128 suffix to long double builtins for ppc darwin. */ | |
6aee6ac8 | 3275 | |
3276 | static void | |
8158aa7e | 3277 | darwin_patch_builtin (enum built_in_function fncode) |
6aee6ac8 | 3278 | { |
b9a16870 | 3279 | tree fn = builtin_decl_explicit (fncode); |
6aee6ac8 | 3280 | tree sym; |
3281 | char *newname; | |
3282 | ||
3283 | if (!fn) | |
3284 | return; | |
3285 | ||
3286 | sym = DECL_ASSEMBLER_NAME (fn); | |
d243d9c9 | 3287 | newname = ACONCAT (("_", IDENTIFIER_POINTER (sym), "$LDBL128", NULL)); |
3288 | ||
6aee6ac8 | 3289 | set_user_assembler_name (fn, newname); |
6aee6ac8 | 3290 | |
b9a16870 | 3291 | fn = builtin_decl_implicit (fncode); |
6aee6ac8 | 3292 | if (fn) |
3293 | set_user_assembler_name (fn, newname); | |
6aee6ac8 | 3294 | } |
3295 | ||
3296 | void | |
3297 | darwin_patch_builtins (void) | |
3298 | { | |
3299 | if (LONG_DOUBLE_TYPE_SIZE != 128) | |
3300 | return; | |
3301 | ||
3302 | #define PATCH_BUILTIN(fncode) darwin_patch_builtin (fncode); | |
d243d9c9 | 3303 | #define PATCH_BUILTIN_NO64(fncode) \ |
3304 | if (!TARGET_64BIT) \ | |
6aee6ac8 | 3305 | darwin_patch_builtin (fncode); |
d243d9c9 | 3306 | #define PATCH_BUILTIN_VARIADIC(fncode) \ |
3307 | if (!TARGET_64BIT \ | |
6aee6ac8 | 3308 | && (strverscmp (darwin_macosx_version_min, "10.3.9") >= 0)) \ |
3309 | darwin_patch_builtin (fncode); | |
3310 | #include "darwin-ppc-ldouble-patch.def" | |
3311 | #undef PATCH_BUILTIN | |
3312 | #undef PATCH_BUILTIN_NO64 | |
3313 | #undef PATCH_BUILTIN_VARIADIC | |
3314 | } | |
8158aa7e | 3315 | #endif |
6aee6ac8 | 3316 | |
d4238e8b | 3317 | /* CFStrings implementation. */ |
3318 | static GTY(()) tree cfstring_class_reference = NULL_TREE; | |
3319 | static GTY(()) tree cfstring_type_node = NULL_TREE; | |
3320 | static GTY(()) tree ccfstring_type_node = NULL_TREE; | |
3321 | static GTY(()) tree pccfstring_type_node = NULL_TREE; | |
3322 | static GTY(()) tree pcint_type_node = NULL_TREE; | |
3323 | static GTY(()) tree pcchar_type_node = NULL_TREE; | |
3324 | ||
820c090b | 3325 | static enum built_in_function darwin_builtin_cfstring; |
d4238e8b | 3326 | |
3327 | /* Store all constructed constant CFStrings in a hash table so that | |
3328 | they get uniqued properly. */ | |
3329 | ||
2ef51f0e | 3330 | typedef struct GTY ((for_user)) cfstring_descriptor { |
d4238e8b | 3331 | /* The string literal. */ |
3332 | tree literal; | |
3333 | /* The resulting constant CFString. */ | |
3334 | tree constructor; | |
3335 | } cfstring_descriptor; | |
3336 | ||
b594087e | 3337 | struct cfstring_hasher : ggc_ptr_hash<cfstring_descriptor> |
2ef51f0e | 3338 | { |
3339 | static hashval_t hash (cfstring_descriptor *); | |
3340 | static bool equal (cfstring_descriptor *, cfstring_descriptor *); | |
3341 | }; | |
d4238e8b | 3342 | |
2ef51f0e | 3343 | static GTY (()) hash_table<cfstring_hasher> *cfstring_htab; |
d4238e8b | 3344 | |
3345 | static tree | |
3346 | add_builtin_field_decl (tree type, const char *name, tree **chain) | |
3347 | { | |
3348 | tree field = build_decl (BUILTINS_LOCATION, FIELD_DECL, | |
3349 | get_identifier (name), type); | |
3350 | ||
3351 | if (*chain != NULL) | |
3352 | **chain = field; | |
3353 | *chain = &DECL_CHAIN (field); | |
3354 | ||
3355 | return field; | |
3356 | } | |
3357 | ||
820c090b | 3358 | tree |
3359 | darwin_init_cfstring_builtins (unsigned builtin_cfstring) | |
d4238e8b | 3360 | { |
3361 | tree cfsfun, fields, pccfstring_ftype_pcchar; | |
3362 | tree *chain = NULL; | |
3363 | ||
820c090b | 3364 | darwin_builtin_cfstring = |
3365 | (enum built_in_function) builtin_cfstring; | |
d4238e8b | 3366 | |
3367 | /* struct __builtin_CFString { | |
3368 | const int *isa; (will point at | |
3369 | int flags; __CFConstantStringClassReference) | |
3370 | const char *str; | |
3371 | long length; | |
3372 | }; */ | |
3373 | ||
3374 | pcint_type_node = build_pointer_type | |
3375 | (build_qualified_type (integer_type_node, TYPE_QUAL_CONST)); | |
3376 | ||
3377 | pcchar_type_node = build_pointer_type | |
3378 | (build_qualified_type (char_type_node, TYPE_QUAL_CONST)); | |
3379 | ||
3380 | cfstring_type_node = (*lang_hooks.types.make_type) (RECORD_TYPE); | |
3381 | ||
3382 | /* Have to build backwards for finish struct. */ | |
3383 | fields = add_builtin_field_decl (long_integer_type_node, "length", &chain); | |
3384 | add_builtin_field_decl (pcchar_type_node, "str", &chain); | |
3385 | add_builtin_field_decl (integer_type_node, "flags", &chain); | |
3386 | add_builtin_field_decl (pcint_type_node, "isa", &chain); | |
3387 | finish_builtin_struct (cfstring_type_node, "__builtin_CFString", | |
3388 | fields, NULL_TREE); | |
3389 | ||
3390 | /* const struct __builtin_CFstring * | |
3391 | __builtin___CFStringMakeConstantString (const char *); */ | |
3392 | ||
3393 | ccfstring_type_node = build_qualified_type | |
3394 | (cfstring_type_node, TYPE_QUAL_CONST); | |
3395 | pccfstring_type_node = build_pointer_type (ccfstring_type_node); | |
3396 | pccfstring_ftype_pcchar = build_function_type_list | |
3397 | (pccfstring_type_node, pcchar_type_node, NULL_TREE); | |
3398 | ||
3399 | cfsfun = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, | |
3400 | get_identifier ("__builtin___CFStringMakeConstantString"), | |
3401 | pccfstring_ftype_pcchar); | |
3402 | ||
3403 | TREE_PUBLIC (cfsfun) = 1; | |
3404 | DECL_EXTERNAL (cfsfun) = 1; | |
3405 | DECL_ARTIFICIAL (cfsfun) = 1; | |
3406 | /* Make a lang-specific section - dup_lang_specific_decl makes a new node | |
3407 | in place of the existing, which may be NULL. */ | |
3408 | DECL_LANG_SPECIFIC (cfsfun) = NULL; | |
3409 | (*lang_hooks.dup_lang_specific_decl) (cfsfun); | |
3410 | DECL_BUILT_IN_CLASS (cfsfun) = BUILT_IN_MD; | |
820c090b | 3411 | DECL_FUNCTION_CODE (cfsfun) = darwin_builtin_cfstring; |
d4238e8b | 3412 | lang_hooks.builtin_function (cfsfun); |
3413 | ||
3414 | /* extern int __CFConstantStringClassReference[]; */ | |
3415 | cfstring_class_reference = build_decl (BUILTINS_LOCATION, VAR_DECL, | |
3416 | get_identifier ("__CFConstantStringClassReference"), | |
3417 | build_array_type (integer_type_node, NULL_TREE)); | |
3418 | ||
3419 | TREE_PUBLIC (cfstring_class_reference) = 1; | |
3420 | DECL_ARTIFICIAL (cfstring_class_reference) = 1; | |
3421 | (*lang_hooks.decls.pushdecl) (cfstring_class_reference); | |
3422 | DECL_EXTERNAL (cfstring_class_reference) = 1; | |
3423 | rest_of_decl_compilation (cfstring_class_reference, 0, 0); | |
3424 | ||
3425 | /* Initialize the hash table used to hold the constant CFString objects. */ | |
2ef51f0e | 3426 | cfstring_htab = hash_table<cfstring_hasher>::create_ggc (31); |
820c090b | 3427 | |
3428 | return cfstring_type_node; | |
d4238e8b | 3429 | } |
3430 | ||
3431 | tree | |
3432 | darwin_fold_builtin (tree fndecl, int n_args, tree *argp, | |
3433 | bool ARG_UNUSED (ignore)) | |
3434 | { | |
3435 | unsigned int fcode = DECL_FUNCTION_CODE (fndecl); | |
3436 | ||
820c090b | 3437 | if (fcode == darwin_builtin_cfstring) |
d4238e8b | 3438 | { |
3439 | if (!darwin_constant_cfstrings) | |
3440 | { | |
3441 | error ("built-in function %qD requires the" | |
3442 | " %<-mconstant-cfstrings%> flag", fndecl); | |
3443 | return error_mark_node; | |
3444 | } | |
3445 | ||
3446 | if (n_args != 1) | |
3447 | { | |
3448 | error ("built-in function %qD takes one argument only", fndecl); | |
3449 | return error_mark_node; | |
3450 | } | |
3451 | ||
3452 | return darwin_build_constant_cfstring (*argp); | |
3453 | } | |
3454 | ||
3455 | return NULL_TREE; | |
3456 | } | |
3457 | ||
f6829196 | 3458 | void |
3459 | darwin_rename_builtins (void) | |
3460 | { | |
3461 | /* The system ___divdc3 routine in libSystem on darwin10 is not | |
3462 | accurate to 1ulp, ours is, so we avoid ever using the system name | |
3463 | for this routine and instead install a non-conflicting name that | |
3464 | is accurate. | |
3465 | ||
3466 | When -ffast-math or -funsafe-math-optimizations is given, we can | |
3467 | use the faster version. */ | |
3468 | if (!flag_unsafe_math_optimizations) | |
3469 | { | |
b9a16870 | 3470 | enum built_in_function dcode |
3471 | = (enum built_in_function)(BUILT_IN_COMPLEX_DIV_MIN | |
3472 | + DCmode - MIN_MODE_COMPLEX_FLOAT); | |
3473 | tree fn = builtin_decl_explicit (dcode); | |
f6829196 | 3474 | /* Fortran and c call TARGET_INIT_BUILTINS and |
3475 | TARGET_INIT_LIBFUNCS at different times, so we have to put a | |
3476 | call into each to ensure that at least one of them is called | |
3477 | after build_common_builtin_nodes. A better fix is to add a | |
3478 | new hook to run after build_common_builtin_nodes runs. */ | |
3479 | if (fn) | |
3480 | set_user_assembler_name (fn, "___ieee_divdc3"); | |
b9a16870 | 3481 | fn = builtin_decl_implicit (dcode); |
f6829196 | 3482 | if (fn) |
3483 | set_user_assembler_name (fn, "___ieee_divdc3"); | |
3484 | } | |
3485 | } | |
3486 | ||
30f690e0 | 3487 | bool |
3488 | darwin_libc_has_function (enum function_class fn_class) | |
3489 | { | |
3490 | if (fn_class == function_sincos) | |
3491 | return false; | |
3492 | if (fn_class == function_c99_math_complex | |
3493 | || fn_class == function_c99_misc) | |
3494 | return (TARGET_64BIT | |
3495 | || strverscmp (darwin_macosx_version_min, "10.3") >= 0); | |
3496 | ||
3497 | return true; | |
3498 | } | |
3499 | ||
2ef51f0e | 3500 | hashval_t |
3501 | cfstring_hasher::hash (cfstring_descriptor *ptr) | |
d4238e8b | 3502 | { |
2ef51f0e | 3503 | tree str = ptr->literal; |
d4238e8b | 3504 | const unsigned char *p = (const unsigned char *) TREE_STRING_POINTER (str); |
3505 | int i, len = TREE_STRING_LENGTH (str); | |
3506 | hashval_t h = len; | |
3507 | ||
3508 | for (i = 0; i < len; i++) | |
3509 | h = ((h * 613) + p[i]); | |
3510 | ||
3511 | return h; | |
3512 | } | |
3513 | ||
2ef51f0e | 3514 | bool |
3515 | cfstring_hasher::equal (cfstring_descriptor *ptr1, cfstring_descriptor *ptr2) | |
d4238e8b | 3516 | { |
2ef51f0e | 3517 | tree str1 = ptr1->literal; |
3518 | tree str2 = ptr2->literal; | |
d4238e8b | 3519 | int len1 = TREE_STRING_LENGTH (str1); |
3520 | ||
3521 | return (len1 == TREE_STRING_LENGTH (str2) | |
3522 | && !memcmp (TREE_STRING_POINTER (str1), TREE_STRING_POINTER (str2), | |
3523 | len1)); | |
3524 | } | |
3525 | ||
3526 | tree | |
3527 | darwin_build_constant_cfstring (tree str) | |
3528 | { | |
3529 | struct cfstring_descriptor *desc, key; | |
d4238e8b | 3530 | tree addr; |
3531 | ||
3532 | if (!str) | |
3533 | { | |
3534 | error ("CFString literal is missing"); | |
3535 | return error_mark_node; | |
3536 | } | |
3537 | ||
3538 | STRIP_NOPS (str); | |
3539 | ||
3540 | if (TREE_CODE (str) == ADDR_EXPR) | |
3541 | str = TREE_OPERAND (str, 0); | |
3542 | ||
3543 | if (TREE_CODE (str) != STRING_CST) | |
3544 | { | |
3545 | error ("CFString literal expression is not a string constant"); | |
3546 | return error_mark_node; | |
3547 | } | |
3548 | ||
3549 | /* Perhaps we already constructed a constant CFString just like this one? */ | |
3550 | key.literal = str; | |
2ef51f0e | 3551 | cfstring_descriptor **loc = cfstring_htab->find_slot (&key, INSERT); |
3552 | desc = *loc; | |
d4238e8b | 3553 | |
3554 | if (!desc) | |
3555 | { | |
3556 | tree var, constructor, field; | |
f1f41a6c | 3557 | vec<constructor_elt, va_gc> *v = NULL; |
d4238e8b | 3558 | int length = TREE_STRING_LENGTH (str) - 1; |
3559 | ||
3560 | if (darwin_warn_nonportable_cfstrings) | |
3561 | { | |
3562 | const char *s = TREE_STRING_POINTER (str); | |
3563 | int l = 0; | |
3564 | ||
3565 | for (l = 0; l < length; l++) | |
3566 | if (!s[l] || !isascii (s[l])) | |
3567 | { | |
3568 | warning (darwin_warn_nonportable_cfstrings, "%s in CFString literal", | |
3569 | s[l] ? "non-ASCII character" : "embedded NUL"); | |
3570 | break; | |
3571 | } | |
3572 | } | |
3573 | ||
25a27413 | 3574 | *loc = desc = ggc_cleared_alloc<cfstring_descriptor> (); |
d4238e8b | 3575 | desc->literal = str; |
3576 | ||
3577 | /* isa *. */ | |
3578 | field = TYPE_FIELDS (ccfstring_type_node); | |
3579 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, | |
3580 | build1 (ADDR_EXPR, TREE_TYPE (field), | |
3581 | cfstring_class_reference)); | |
3582 | /* flags */ | |
3583 | field = DECL_CHAIN (field); | |
3584 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, | |
3585 | build_int_cst (TREE_TYPE (field), 0x000007c8)); | |
3586 | /* string *. */ | |
3587 | field = DECL_CHAIN (field); | |
3588 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, | |
3589 | build1 (ADDR_EXPR, TREE_TYPE (field), str)); | |
3590 | /* length */ | |
3591 | field = DECL_CHAIN (field); | |
3592 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, | |
3593 | build_int_cst (TREE_TYPE (field), length)); | |
3594 | ||
3595 | constructor = build_constructor (ccfstring_type_node, v); | |
3596 | TREE_READONLY (constructor) = 1; | |
3597 | TREE_CONSTANT (constructor) = 1; | |
3598 | TREE_STATIC (constructor) = 1; | |
3599 | ||
3600 | /* Fromage: The C++ flavor of 'build_unary_op' expects constructor nodes | |
3601 | to have the TREE_HAS_CONSTRUCTOR (...) bit set. However, this file is | |
3602 | being built without any knowledge of C++ tree accessors; hence, we shall | |
3603 | use the generic accessor that TREE_HAS_CONSTRUCTOR actually maps to! */ | |
3604 | if (darwin_running_cxx) | |
3605 | TREE_LANG_FLAG_4 (constructor) = 1; /* TREE_HAS_CONSTRUCTOR */ | |
3606 | ||
3607 | /* Create an anonymous global variable for this CFString. */ | |
3608 | var = build_decl (input_location, CONST_DECL, | |
3609 | NULL, TREE_TYPE (constructor)); | |
3610 | DECL_ARTIFICIAL (var) = 1; | |
3611 | TREE_STATIC (var) = 1; | |
3612 | DECL_INITIAL (var) = constructor; | |
3613 | /* FIXME: This should use a translation_unit_decl to indicate file scope. */ | |
3614 | DECL_CONTEXT (var) = NULL_TREE; | |
3615 | desc->constructor = var; | |
3616 | } | |
3617 | ||
3618 | addr = build1 (ADDR_EXPR, pccfstring_type_node, desc->constructor); | |
3619 | TREE_CONSTANT (addr) = 1; | |
3620 | ||
3621 | return addr; | |
3622 | } | |
3623 | ||
3624 | bool | |
3625 | darwin_cfstring_p (tree str) | |
3626 | { | |
3627 | struct cfstring_descriptor key; | |
d4238e8b | 3628 | |
3629 | if (!str) | |
3630 | return false; | |
3631 | ||
3632 | STRIP_NOPS (str); | |
3633 | ||
3634 | if (TREE_CODE (str) == ADDR_EXPR) | |
3635 | str = TREE_OPERAND (str, 0); | |
3636 | ||
3637 | if (TREE_CODE (str) != STRING_CST) | |
3638 | return false; | |
3639 | ||
3640 | key.literal = str; | |
2ef51f0e | 3641 | cfstring_descriptor **loc = cfstring_htab->find_slot (&key, NO_INSERT); |
d4238e8b | 3642 | |
3643 | if (loc) | |
3644 | return true; | |
3645 | ||
3646 | return false; | |
3647 | } | |
3648 | ||
3649 | void | |
3650 | darwin_enter_string_into_cfstring_table (tree str) | |
3651 | { | |
3652 | struct cfstring_descriptor key; | |
d4238e8b | 3653 | |
3654 | key.literal = str; | |
2ef51f0e | 3655 | cfstring_descriptor **loc = cfstring_htab->find_slot (&key, INSERT); |
d4238e8b | 3656 | |
3657 | if (!*loc) | |
3658 | { | |
25a27413 | 3659 | *loc = ggc_cleared_alloc<cfstring_descriptor> (); |
d4238e8b | 3660 | ((struct cfstring_descriptor *)*loc)->literal = str; |
3661 | } | |
3662 | } | |
6aee6ac8 | 3663 | |
3b73548b | 3664 | /* Choose named function section based on its frequency. */ |
3665 | ||
3666 | section * | |
3667 | darwin_function_section (tree decl, enum node_frequency freq, | |
3668 | bool startup, bool exit) | |
3669 | { | |
9e09909d | 3670 | /* Decide if we need to put this in a coalescable section. */ |
f199808c | 3671 | bool weak = (decl |
9e09909d | 3672 | && DECL_WEAK (decl) |
3673 | && (!DECL_ATTRIBUTES (decl) | |
3674 | || !lookup_attribute ("weak_import", | |
3675 | DECL_ATTRIBUTES (decl)))); | |
3676 | ||
f199808c | 3677 | bool use_coal = weak && ld_uses_coal_sects; |
9e09909d | 3678 | /* If there is a specified section name, we should not be trying to |
3679 | override. */ | |
738a6bda | 3680 | if (decl && DECL_SECTION_NAME (decl) != NULL) |
9e09909d | 3681 | return get_named_section (decl, NULL, 0); |
3682 | ||
0fbd1542 | 3683 | /* We always put unlikely executed stuff in the cold section. */ |
3684 | if (freq == NODE_FREQUENCY_UNLIKELY_EXECUTED) | |
f199808c | 3685 | return (use_coal) ? darwin_sections[text_cold_coal_section] |
3686 | : darwin_sections[text_cold_section]; | |
0fbd1542 | 3687 | |
3688 | /* If we have LTO *and* feedback information, then let LTO handle | |
3689 | the function ordering, it makes a better job (for normal, hot, | |
3690 | startup and exit - hence the bailout for cold above). */ | |
3691 | if (in_lto_p && flag_profile_values) | |
3692 | goto default_function_sections; | |
3693 | ||
3694 | /* Non-cold startup code should go to startup subsection. */ | |
3695 | if (startup) | |
f199808c | 3696 | return (use_coal) ? darwin_sections[text_startup_coal_section] |
3697 | : darwin_sections[text_startup_section]; | |
3b73548b | 3698 | |
3699 | /* Similarly for exit. */ | |
0fbd1542 | 3700 | if (exit) |
f199808c | 3701 | return (use_coal) ? darwin_sections[text_exit_coal_section] |
3702 | : darwin_sections[text_exit_section]; | |
0fbd1542 | 3703 | |
3704 | /* Place hot code. */ | |
3705 | if (freq == NODE_FREQUENCY_HOT) | |
f199808c | 3706 | return (use_coal) ? darwin_sections[text_hot_coal_section] |
3707 | : darwin_sections[text_hot_section]; | |
0fbd1542 | 3708 | |
3709 | /* Otherwise, default to the 'normal' non-reordered sections. */ | |
3710 | default_function_sections: | |
f199808c | 3711 | return (use_coal) ? darwin_sections[text_coal_section] |
3712 | : text_section; | |
3b73548b | 3713 | } |
3714 | ||
1f3233d1 | 3715 | #include "gt-darwin.h" |