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ee890fe2 | 1 | /* Functions for generic Darwin as target machine for GNU C compiler. |
5624e564 | 2 | Copyright (C) 1989-2015 Free Software Foundation, Inc. |
ee890fe2 SS |
3 | Contributed by Apple Computer Inc. |
4 | ||
7ec022b2 | 5 | This file is part of GCC. |
ee890fe2 | 6 | |
7ec022b2 | 7 | GCC is free software; you can redistribute it and/or modify |
ee890fe2 | 8 | it under the terms of the GNU General Public License as published by |
2f83c7d6 | 9 | the Free Software Foundation; either version 3, or (at your option) |
ee890fe2 SS |
10 | any later version. |
11 | ||
7ec022b2 | 12 | GCC is distributed in the hope that it will be useful, |
ee890fe2 SS |
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 | |
2f83c7d6 NC |
18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
ee890fe2 SS |
20 | |
21 | #include "config.h" | |
22 | #include "system.h" | |
4977bab6 | 23 | #include "coretypes.h" |
c7131fb2 | 24 | #include "backend.h" |
9fdcd34e | 25 | #include "cfghooks.h" |
c7131fb2 AM |
26 | #include "tree.h" |
27 | #include "gimple.h" | |
ee890fe2 | 28 | #include "rtl.h" |
c7131fb2 | 29 | #include "df.h" |
ee890fe2 | 30 | #include "regs.h" |
ee890fe2 SS |
31 | #include "insn-config.h" |
32 | #include "conditions.h" | |
33 | #include "insn-flags.h" | |
34 | #include "output.h" | |
35 | #include "insn-attr.h" | |
36 | #include "flags.h" | |
40e23961 | 37 | #include "alias.h" |
40e23961 | 38 | #include "fold-const.h" |
d8a2d370 DN |
39 | #include "stringpool.h" |
40 | #include "varasm.h" | |
41 | #include "stor-layout.h" | |
36566b39 PK |
42 | #include "expmed.h" |
43 | #include "dojump.h" | |
44 | #include "explow.h" | |
45 | #include "calls.h" | |
46 | #include "emit-rtl.h" | |
47 | #include "stmt.h" | |
ee890fe2 SS |
48 | #include "expr.h" |
49 | #include "reload.h" | |
3ac88239 | 50 | #include "langhooks.h" |
1adaa117 | 51 | #include "target.h" |
245ff137 | 52 | #include "tm_p.h" |
718f9c0f | 53 | #include "diagnostic-core.h" |
4c714dd4 | 54 | #include "toplev.h" |
60393bbc AM |
55 | #include "cfgrtl.h" |
56 | #include "cfganal.h" | |
57 | #include "lcm.h" | |
58 | #include "cfgbuild.h" | |
59 | #include "cfgcleanup.h" | |
9faca04e | 60 | #include "debug.h" |
2fb9a547 AM |
61 | #include "internal-fn.h" |
62 | #include "gimple-fold.h" | |
63 | #include "tree-eh.h" | |
45b0be94 | 64 | #include "gimplify.h" |
c582198b | 65 | #include "cgraph.h" |
f51ade33 | 66 | #include "alloc-pool.h" |
c082f9f3 | 67 | #include "lto-streamer.h" |
4000360e | 68 | #include "lto-section-names.h" |
ee890fe2 | 69 | |
699c914a MS |
70 | /* Darwin supports a feature called fix-and-continue, which is used |
71 | for rapid turn around debugging. When code is compiled with the | |
72 | -mfix-and-continue flag, two changes are made to the generated code | |
73 | that allow the system to do things that it would normally not be | |
74 | able to do easily. These changes allow gdb to load in | |
75 | recompilation of a translation unit that has been changed into a | |
76 | running program and replace existing functions and methods of that | |
56f42830 | 77 | translation unit with versions of those functions and methods |
699c914a | 78 | from the newly compiled translation unit. The new functions access |
d6ff8575 MS |
79 | the existing static symbols from the old translation unit, if the |
80 | symbol existed in the unit to be replaced, and from the new | |
81 | translation unit, otherwise. | |
699c914a | 82 | |
de2ab0ca | 83 | The changes are to insert 5 nops at the beginning of all functions |
d6ff8575 | 84 | and to use indirection to get at static symbols. The 5 nops |
699c914a MS |
85 | are required by consumers of the generated code. Currently, gdb |
86 | uses this to patch in a jump to the overriding function, this | |
87 | allows all uses of the old name to forward to the replacement, | |
c112cf2b | 88 | including existing function pointers and virtual methods. See |
699c914a | 89 | rs6000_emit_prologue for the code that handles the nop insertions. |
083cad55 | 90 | |
699c914a | 91 | The added indirection allows gdb to redirect accesses to static |
d6ff8575 MS |
92 | symbols from the newly loaded translation unit to the existing |
93 | symbol, if any. @code{static} symbols are special and are handled by | |
94 | setting the second word in the .non_lazy_symbol_pointer data | |
95 | structure to symbol. See indirect_data for the code that handles | |
96 | the extra indirection, and machopic_output_indirection and its use | |
97 | of MACHO_SYMBOL_STATIC for the code that handles @code{static} | |
98 | symbol indirection. */ | |
699c914a | 99 | |
9005471b IS |
100 | /* For darwin >= 9 (OSX 10.5) the linker is capable of making the necessary |
101 | branch islands and we no longer need to emit darwin stubs. | |
102 | However, if we are generating code for earlier systems (or for use in the | |
103 | kernel) the stubs might still be required, and this will be set true. */ | |
104 | int darwin_emit_branch_islands = false; | |
105 | ||
6a52ccb3 | 106 | typedef struct GTY(()) cdtor_record { |
ae526fe5 | 107 | rtx symbol; |
6a52ccb3 | 108 | int priority; /* [con/de]structor priority */ |
ae526fe5 | 109 | int position; /* original position */ |
6a52ccb3 | 110 | } cdtor_record; |
ae526fe5 | 111 | |
6a52ccb3 AP |
112 | static GTY(()) vec<cdtor_record, va_gc> *ctors = NULL; |
113 | static GTY(()) vec<cdtor_record, va_gc> *dtors = NULL; | |
ae526fe5 | 114 | |
26705988 IS |
115 | /* A flag to determine whether we are running c++ or obj-c++. This has to be |
116 | settable from non-c-family contexts too (i.e. we can't use the c_dialect_ | |
117 | functions). */ | |
118 | int darwin_running_cxx; | |
119 | ||
1f81953b IS |
120 | /* Some code-gen now depends on OS major version numbers (at least). */ |
121 | int generating_for_darwin_version ; | |
122 | ||
56c779bc GK |
123 | /* Section names. */ |
124 | section * darwin_sections[NUM_DARWIN_SECTIONS]; | |
d6b5193b | 125 | |
fee3eacd | 126 | /* While we transition to using in-tests instead of ifdef'd code. */ |
d0b2266a | 127 | #if !HAVE_lo_sum |
fee3eacd IS |
128 | #define gen_macho_high(a,b) (a) |
129 | #define gen_macho_low(a,b,c) (a) | |
130 | #endif | |
131 | ||
4f8bdef9 EC |
132 | /* True if we're setting __attribute__ ((ms_struct)). */ |
133 | int darwin_ms_struct = false; | |
134 | ||
46a99b06 IS |
135 | /* Earlier versions of Darwin as do not recognize an alignment field in |
136 | .comm directives, this should be set for versions that allow it. */ | |
137 | int emit_aligned_common = false; | |
138 | ||
d6b5193b RS |
139 | /* A get_unnamed_section callback used to switch to an ObjC section. |
140 | DIRECTIVE is as for output_section_asm_op. */ | |
141 | ||
142 | static void | |
143 | output_objc_section_asm_op (const void *directive) | |
144 | { | |
56c779bc | 145 | static bool been_here = false; |
d6b5193b | 146 | |
83bf7f5e IS |
147 | /* The NeXT ObjC Runtime requires these sections to be present and in |
148 | order in the object. The code below implements this by emitting | |
149 | a section header for each ObjC section the first time that an ObjC | |
150 | section is requested. */ | |
56c779bc | 151 | if (! been_here) |
d6b5193b | 152 | { |
058bfe53 | 153 | section *saved_in_section = in_section; |
083cad55 | 154 | static const enum darwin_section_enum tomark[] = |
56c779bc GK |
155 | { |
156 | /* written, cold -> hot */ | |
157 | objc_cat_cls_meth_section, | |
158 | objc_cat_inst_meth_section, | |
159 | objc_string_object_section, | |
160 | objc_constant_string_object_section, | |
161 | objc_selector_refs_section, | |
162 | objc_selector_fixup_section, | |
163 | objc_cls_refs_section, | |
164 | objc_class_section, | |
165 | objc_meta_class_section, | |
166 | /* shared, hot -> cold */ | |
167 | objc_cls_meth_section, | |
168 | objc_inst_meth_section, | |
169 | objc_protocol_section, | |
170 | objc_class_names_section, | |
171 | objc_meth_var_types_section, | |
172 | objc_meth_var_names_section, | |
173 | objc_category_section, | |
174 | objc_class_vars_section, | |
175 | objc_instance_vars_section, | |
176 | objc_module_info_section, | |
d764a8e6 | 177 | objc_symbols_section, |
56c779bc | 178 | }; |
d764a8e6 IS |
179 | /* ABI=1 */ |
180 | static const enum darwin_section_enum tomarkv1[] = | |
181 | { | |
182 | objc1_protocol_ext_section, | |
183 | objc1_class_ext_section, | |
184 | objc1_prop_list_section | |
185 | } ; | |
186 | /* ABI=2 */ | |
187 | static const enum darwin_section_enum tomarkv2[] = | |
188 | { | |
189 | objc2_message_refs_section, | |
190 | objc2_classdefs_section, | |
191 | objc2_metadata_section, | |
192 | objc2_classrefs_section, | |
193 | objc2_classlist_section, | |
194 | objc2_categorylist_section, | |
195 | objc2_selector_refs_section, | |
196 | objc2_nonlazy_class_section, | |
197 | objc2_nonlazy_category_section, | |
198 | objc2_protocollist_section, | |
199 | objc2_protocolrefs_section, | |
200 | objc2_super_classrefs_section, | |
201 | objc2_image_info_section, | |
202 | objc2_constant_string_object_section | |
203 | } ; | |
56c779bc | 204 | size_t i; |
083cad55 | 205 | |
56c779bc | 206 | been_here = true; |
d764a8e6 IS |
207 | if (flag_objc_abi < 2) |
208 | { | |
209 | for (i = 0; i < ARRAY_SIZE (tomark); i++) | |
210 | switch_to_section (darwin_sections[tomark[i]]); | |
211 | if (flag_objc_abi == 1) | |
212 | for (i = 0; i < ARRAY_SIZE (tomarkv1); i++) | |
213 | switch_to_section (darwin_sections[tomarkv1[i]]); | |
214 | } | |
215 | else | |
216 | for (i = 0; i < ARRAY_SIZE (tomarkv2); i++) | |
217 | switch_to_section (darwin_sections[tomarkv2[i]]); | |
218 | /* Make sure we don't get varasm.c out of sync with us. */ | |
058bfe53 | 219 | switch_to_section (saved_in_section); |
d6b5193b RS |
220 | } |
221 | output_section_asm_op (directive); | |
222 | } | |
223 | ||
d18d5478 JJ |
224 | |
225 | /* Private flag applied to disable section-anchors in a particular section. */ | |
226 | #define SECTION_NO_ANCHOR SECTION_MACH_DEP | |
227 | ||
228 | ||
d6b5193b RS |
229 | /* Implement TARGET_ASM_INIT_SECTIONS. */ |
230 | ||
231 | void | |
232 | darwin_init_sections (void) | |
233 | { | |
56c779bc GK |
234 | #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) \ |
235 | darwin_sections[NAME] = \ | |
236 | get_unnamed_section (FLAGS, (OBJC \ | |
237 | ? output_objc_section_asm_op \ | |
238 | : output_section_asm_op), \ | |
239 | "\t" DIRECTIVE); | |
240 | #include "config/darwin-sections.def" | |
d6b5193b RS |
241 | #undef DEF_SECTION |
242 | ||
56c779bc GK |
243 | readonly_data_section = darwin_sections[const_section]; |
244 | exception_section = darwin_sections[darwin_exception_section]; | |
245 | eh_frame_section = darwin_sections[darwin_eh_frame_section]; | |
d6b5193b | 246 | } |
699c914a | 247 | |
ee890fe2 | 248 | int |
9c808aad | 249 | name_needs_quotes (const char *name) |
ee890fe2 SS |
250 | { |
251 | int c; | |
252 | while ((c = *name++) != '\0') | |
83bf7f5e IS |
253 | if (! ISIDNUM (c) |
254 | && c != '.' && c != '$' && c != '_' ) | |
ee890fe2 SS |
255 | return 1; |
256 | return 0; | |
257 | } | |
258 | ||
16515e5c | 259 | /* Return true if SYM_REF can be used without an indirection. */ |
fee3eacd | 260 | int |
11abc112 | 261 | machopic_symbol_defined_p (rtx sym_ref) |
ee890fe2 | 262 | { |
16515e5c AP |
263 | if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_DEFINED) |
264 | return true; | |
265 | ||
266 | /* If a symbol references local and is not an extern to this | |
267 | file, then the symbol might be able to declared as defined. */ | |
268 | if (SYMBOL_REF_LOCAL_P (sym_ref) && ! SYMBOL_REF_EXTERNAL_P (sym_ref)) | |
269 | { | |
270 | /* If the symbol references a variable and the variable is a | |
271 | common symbol, then this symbol is not defined. */ | |
272 | if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_VARIABLE) | |
273 | { | |
274 | tree decl = SYMBOL_REF_DECL (sym_ref); | |
275 | if (!decl) | |
276 | return true; | |
277 | if (DECL_COMMON (decl)) | |
278 | return false; | |
279 | } | |
280 | return true; | |
281 | } | |
282 | return false; | |
ee890fe2 SS |
283 | } |
284 | ||
11abc112 MM |
285 | /* This module assumes that (const (symbol_ref "foo")) is a legal pic |
286 | reference, which will not be changed. */ | |
9c808aad | 287 | |
ee890fe2 | 288 | enum machopic_addr_class |
11abc112 | 289 | machopic_classify_symbol (rtx sym_ref) |
ee890fe2 | 290 | { |
11abc112 MM |
291 | bool function_p; |
292 | ||
11abc112 MM |
293 | function_p = SYMBOL_REF_FUNCTION_P (sym_ref); |
294 | if (machopic_symbol_defined_p (sym_ref)) | |
083cad55 | 295 | return (function_p |
11abc112 MM |
296 | ? MACHOPIC_DEFINED_FUNCTION : MACHOPIC_DEFINED_DATA); |
297 | else | |
083cad55 | 298 | return (function_p |
11abc112 | 299 | ? MACHOPIC_UNDEFINED_FUNCTION : MACHOPIC_UNDEFINED_DATA); |
ee890fe2 SS |
300 | } |
301 | ||
699c914a MS |
302 | #ifndef TARGET_FIX_AND_CONTINUE |
303 | #define TARGET_FIX_AND_CONTINUE 0 | |
304 | #endif | |
305 | ||
306 | /* Indicate when fix-and-continue style code generation is being used | |
307 | and when a reference to data should be indirected so that it can be | |
35fd3193 | 308 | rebound in a new translation unit to reference the original instance |
699c914a MS |
309 | of that data. Symbol names that are for code generation local to |
310 | the translation unit are bound to the new translation unit; | |
311 | currently this means symbols that begin with L or _OBJC_; | |
312 | otherwise, we indicate that an indirect reference should be made to | |
313 | permit the runtime to rebind new instances of the translation unit | |
314 | to the original instance of the data. */ | |
315 | ||
316 | static int | |
317 | indirect_data (rtx sym_ref) | |
318 | { | |
319 | int lprefix; | |
320 | const char *name; | |
321 | ||
62baeb4f EC |
322 | /* If we aren't generating fix-and-continue code, don't do anything |
323 | special. */ | |
699c914a MS |
324 | if (TARGET_FIX_AND_CONTINUE == 0) |
325 | return 0; | |
326 | ||
327 | /* Otherwise, all symbol except symbols that begin with L or _OBJC_ | |
328 | are indirected. Symbols that begin with L and _OBJC_ are always | |
329 | bound to the current translation unit as they are used for | |
330 | generated local data of the translation unit. */ | |
331 | ||
332 | name = XSTR (sym_ref, 0); | |
333 | ||
334 | lprefix = (((name[0] == '*' || name[0] == '&') | |
335 | && (name[1] == 'L' || (name[1] == '"' && name[2] == 'L'))) | |
ad6aaeb6 | 336 | || (strncmp (name, "_OBJC_", 6) == 0)); |
699c914a MS |
337 | |
338 | return ! lprefix; | |
339 | } | |
340 | ||
ee890fe2 | 341 | static int |
11abc112 | 342 | machopic_data_defined_p (rtx sym_ref) |
ee890fe2 | 343 | { |
699c914a MS |
344 | if (indirect_data (sym_ref)) |
345 | return 0; | |
346 | ||
11abc112 | 347 | switch (machopic_classify_symbol (sym_ref)) |
ee890fe2 SS |
348 | { |
349 | case MACHOPIC_DEFINED_DATA: | |
0e1ad529 | 350 | case MACHOPIC_DEFINED_FUNCTION: |
ee890fe2 SS |
351 | return 1; |
352 | default: | |
353 | return 0; | |
354 | } | |
355 | } | |
356 | ||
ee890fe2 | 357 | void |
11abc112 | 358 | machopic_define_symbol (rtx mem) |
ee890fe2 | 359 | { |
11abc112 | 360 | rtx sym_ref; |
083cad55 | 361 | |
992d08b1 | 362 | gcc_assert (GET_CODE (mem) == MEM); |
11abc112 MM |
363 | sym_ref = XEXP (mem, 0); |
364 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; | |
ee890fe2 SS |
365 | } |
366 | ||
08a6a74b | 367 | /* Return either ORIG or: |
ee890fe2 | 368 | |
08a6a74b | 369 | (const:P (unspec:P [ORIG] UNSPEC_MACHOPIC_OFFSET)) |
11abc112 | 370 | |
08a6a74b | 371 | depending on MACHO_DYNAMIC_NO_PIC_P. */ |
11abc112 | 372 | rtx |
08a6a74b | 373 | machopic_gen_offset (rtx orig) |
11abc112 | 374 | { |
08a6a74b | 375 | if (MACHO_DYNAMIC_NO_PIC_P) |
14a07c92 PB |
376 | return orig; |
377 | else | |
08a6a74b RS |
378 | { |
379 | /* Play games to avoid marking the function as needing pic if we | |
380 | are being called as part of the cost-estimation process. */ | |
04ef80ce | 381 | if (current_ir_type () != IR_GIMPLE || currently_expanding_to_rtl) |
08a6a74b RS |
382 | crtl->uses_pic_offset_table = 1; |
383 | orig = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, orig), | |
384 | UNSPEC_MACHOPIC_OFFSET); | |
385 | return gen_rtx_CONST (Pmode, orig); | |
386 | } | |
14a07c92 PB |
387 | } |
388 | ||
1622229c AP |
389 | static GTY(()) const char * function_base_func_name; |
390 | static GTY(()) int current_pic_label_num; | |
88d9bfe6 | 391 | static GTY(()) int emitted_pic_label_num; |
1622229c | 392 | |
88d9bfe6 IS |
393 | static void |
394 | update_pic_label_number_if_needed (void) | |
1622229c AP |
395 | { |
396 | const char *current_name; | |
397 | ||
fee3eacd IS |
398 | /* When we are generating _get_pc thunks within stubs, there is no current |
399 | function. */ | |
400 | if (current_function_decl) | |
401 | { | |
402 | current_name = | |
403 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl)); | |
404 | if (function_base_func_name != current_name) | |
405 | { | |
406 | ++current_pic_label_num; | |
407 | function_base_func_name = current_name; | |
408 | } | |
409 | } | |
410 | else | |
ee890fe2 | 411 | { |
ee890fe2 | 412 | ++current_pic_label_num; |
fee3eacd | 413 | function_base_func_name = "L_machopic_stub_dummy"; |
ee890fe2 | 414 | } |
88d9bfe6 IS |
415 | } |
416 | ||
417 | void | |
418 | machopic_output_function_base_name (FILE *file) | |
419 | { | |
420 | /* If dynamic-no-pic is on, we should not get here. */ | |
421 | gcc_assert (!MACHO_DYNAMIC_NO_PIC_P); | |
422 | ||
423 | update_pic_label_number_if_needed (); | |
424 | fprintf (file, "L%d$pb", current_pic_label_num); | |
425 | } | |
426 | ||
e1c5c877 IS |
427 | char curr_picbasename[32]; |
428 | ||
429 | const char * | |
430 | machopic_get_function_picbase (void) | |
431 | { | |
432 | /* If dynamic-no-pic is on, we should not get here. */ | |
433 | gcc_assert (!MACHO_DYNAMIC_NO_PIC_P); | |
434 | ||
435 | update_pic_label_number_if_needed (); | |
436 | snprintf (curr_picbasename, 32, "L%d$pb", current_pic_label_num); | |
437 | return (const char *) curr_picbasename; | |
438 | } | |
439 | ||
88d9bfe6 IS |
440 | bool |
441 | machopic_should_output_picbase_label (void) | |
442 | { | |
443 | update_pic_label_number_if_needed (); | |
444 | ||
445 | if (current_pic_label_num == emitted_pic_label_num) | |
446 | return false; | |
447 | ||
448 | emitted_pic_label_num = current_pic_label_num; | |
449 | return true; | |
ee890fe2 SS |
450 | } |
451 | ||
11abc112 MM |
452 | /* The suffix attached to non-lazy pointer symbols. */ |
453 | #define NON_LAZY_POINTER_SUFFIX "$non_lazy_ptr" | |
454 | /* The suffix attached to stub symbols. */ | |
455 | #define STUB_SUFFIX "$stub" | |
ee890fe2 | 456 | |
2a22f99c | 457 | typedef struct GTY ((for_user)) machopic_indirection |
ee890fe2 | 458 | { |
11abc112 MM |
459 | /* The SYMBOL_REF for the entity referenced. */ |
460 | rtx symbol; | |
1adaa117 GK |
461 | /* The name of the stub or non-lazy pointer. */ |
462 | const char * ptr_name; | |
11abc112 MM |
463 | /* True iff this entry is for a stub (as opposed to a non-lazy |
464 | pointer). */ | |
465 | bool stub_p; | |
026c3cfd | 466 | /* True iff this stub or pointer has been referenced. */ |
11abc112 MM |
467 | bool used; |
468 | } machopic_indirection; | |
469 | ||
ca752f39 | 470 | struct indirection_hasher : ggc_ptr_hash<machopic_indirection> |
2a22f99c TS |
471 | { |
472 | typedef const char *compare_type; | |
473 | static hashval_t hash (machopic_indirection *); | |
474 | static bool equal (machopic_indirection *, const char *); | |
475 | }; | |
476 | ||
11abc112 MM |
477 | /* A table mapping stub names and non-lazy pointer names to |
478 | SYMBOL_REFs for the stubbed-to and pointed-to entities. */ | |
479 | ||
2a22f99c | 480 | static GTY (()) hash_table<indirection_hasher> *machopic_indirections; |
11abc112 MM |
481 | |
482 | /* Return a hash value for a SLOT in the indirections hash table. */ | |
483 | ||
2a22f99c TS |
484 | hashval_t |
485 | indirection_hasher::hash (machopic_indirection *p) | |
11abc112 | 486 | { |
1adaa117 | 487 | return htab_hash_string (p->ptr_name); |
11abc112 | 488 | } |
9c808aad | 489 | |
11abc112 MM |
490 | /* Returns true if the KEY is the same as that associated with |
491 | SLOT. */ | |
492 | ||
2a22f99c TS |
493 | bool |
494 | indirection_hasher::equal (machopic_indirection *s, const char *k) | |
11abc112 | 495 | { |
2a22f99c | 496 | return strcmp (s->ptr_name, k) == 0; |
11abc112 | 497 | } |
ee890fe2 | 498 | |
11abc112 MM |
499 | /* Return the name of the non-lazy pointer (if STUB_P is false) or |
500 | stub (if STUB_B is true) corresponding to the given name. */ | |
df56a27f | 501 | |
11abc112 MM |
502 | const char * |
503 | machopic_indirection_name (rtx sym_ref, bool stub_p) | |
504 | { | |
505 | char *buffer; | |
506 | const char *name = XSTR (sym_ref, 0); | |
1adaa117 | 507 | size_t namelen = strlen (name); |
11abc112 | 508 | machopic_indirection *p; |
3d20d4d8 MS |
509 | bool needs_quotes; |
510 | const char *suffix; | |
511 | const char *prefix = user_label_prefix; | |
512 | const char *quote = ""; | |
0a6a4494 AO |
513 | tree id; |
514 | ||
515 | id = maybe_get_identifier (name); | |
516 | if (id) | |
517 | { | |
518 | tree id_orig = id; | |
519 | ||
520 | while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
521 | id = TREE_CHAIN (id); | |
522 | if (id != id_orig) | |
523 | { | |
524 | name = IDENTIFIER_POINTER (id); | |
525 | namelen = strlen (name); | |
526 | } | |
527 | } | |
083cad55 | 528 | |
3d20d4d8 | 529 | if (name[0] == '*') |
df56a27f | 530 | { |
3d20d4d8 MS |
531 | prefix = ""; |
532 | ++name; | |
533 | --namelen; | |
11abc112 | 534 | } |
3d20d4d8 MS |
535 | |
536 | needs_quotes = name_needs_quotes (name); | |
537 | if (needs_quotes) | |
11abc112 | 538 | { |
3d20d4d8 | 539 | quote = "\""; |
df56a27f SS |
540 | } |
541 | ||
3d20d4d8 MS |
542 | if (stub_p) |
543 | suffix = STUB_SUFFIX; | |
544 | else | |
545 | suffix = NON_LAZY_POINTER_SUFFIX; | |
546 | ||
5ead67f6 | 547 | buffer = XALLOCAVEC (char, strlen ("&L") |
3d20d4d8 MS |
548 | + strlen (prefix) |
549 | + namelen | |
550 | + strlen (suffix) | |
551 | + 2 * strlen (quote) | |
552 | + 1 /* '\0' */); | |
553 | ||
554 | /* Construct the name of the non-lazy pointer or stub. */ | |
555 | sprintf (buffer, "&%sL%s%s%s%s", quote, prefix, name, suffix, quote); | |
556 | ||
1adaa117 | 557 | if (!machopic_indirections) |
2a22f99c | 558 | machopic_indirections = hash_table<indirection_hasher>::create_ggc (37); |
083cad55 | 559 | |
2a22f99c TS |
560 | machopic_indirection **slot |
561 | = machopic_indirections->find_slot_with_hash (buffer, | |
562 | htab_hash_string (buffer), | |
563 | INSERT); | |
1adaa117 GK |
564 | if (*slot) |
565 | { | |
2a22f99c | 566 | p = *slot; |
1adaa117 GK |
567 | } |
568 | else | |
11abc112 | 569 | { |
766090c2 | 570 | p = ggc_alloc<machopic_indirection> (); |
11abc112 | 571 | p->symbol = sym_ref; |
1adaa117 | 572 | p->ptr_name = xstrdup (buffer); |
11abc112 | 573 | p->stub_p = stub_p; |
1adaa117 GK |
574 | p->used = false; |
575 | *slot = p; | |
11abc112 | 576 | } |
083cad55 | 577 | |
1adaa117 | 578 | return p->ptr_name; |
ee890fe2 SS |
579 | } |
580 | ||
11abc112 | 581 | /* Return the name of the stub for the mcount function. */ |
ee890fe2 | 582 | |
11abc112 MM |
583 | const char* |
584 | machopic_mcount_stub_name (void) | |
ee890fe2 | 585 | { |
76f60aa5 AP |
586 | rtx symbol = gen_rtx_SYMBOL_REF (Pmode, "*mcount"); |
587 | return machopic_indirection_name (symbol, /*stub_p=*/true); | |
ee890fe2 SS |
588 | } |
589 | ||
11abc112 MM |
590 | /* If NAME is the name of a stub or a non-lazy pointer , mark the stub |
591 | or non-lazy pointer as used -- and mark the object to which the | |
592 | pointer/stub refers as used as well, since the pointer/stub will | |
593 | emit a reference to it. */ | |
594 | ||
ee890fe2 | 595 | void |
11abc112 | 596 | machopic_validate_stub_or_non_lazy_ptr (const char *name) |
ee890fe2 | 597 | { |
2a22f99c TS |
598 | machopic_indirection *p |
599 | = machopic_indirections->find_with_hash (name, htab_hash_string (name)); | |
1adaa117 | 600 | if (p && ! p->used) |
11abc112 | 601 | { |
1adaa117 GK |
602 | const char *real_name; |
603 | tree id; | |
083cad55 | 604 | |
1adaa117 GK |
605 | p->used = true; |
606 | ||
ca472546 GK |
607 | /* Do what output_addr_const will do when we actually call it. */ |
608 | if (SYMBOL_REF_DECL (p->symbol)) | |
609 | mark_decl_referenced (SYMBOL_REF_DECL (p->symbol)); | |
610 | ||
611 | real_name = targetm.strip_name_encoding (XSTR (p->symbol, 0)); | |
083cad55 | 612 | |
1adaa117 GK |
613 | id = maybe_get_identifier (real_name); |
614 | if (id) | |
615 | mark_referenced (id); | |
11abc112 | 616 | } |
ee890fe2 SS |
617 | } |
618 | ||
619 | /* Transform ORIG, which may be any data source, to the corresponding | |
620 | source using indirections. */ | |
621 | ||
622 | rtx | |
9c808aad | 623 | machopic_indirect_data_reference (rtx orig, rtx reg) |
ee890fe2 SS |
624 | { |
625 | rtx ptr_ref = orig; | |
9c808aad | 626 | |
ee890fe2 SS |
627 | if (! MACHOPIC_INDIRECT) |
628 | return orig; | |
629 | ||
630 | if (GET_CODE (orig) == SYMBOL_REF) | |
631 | { | |
11abc112 | 632 | int defined = machopic_data_defined_p (orig); |
ab82a49f AP |
633 | |
634 | if (defined && MACHO_DYNAMIC_NO_PIC_P) | |
635 | { | |
fee3eacd IS |
636 | if (DARWIN_PPC) |
637 | { | |
4f8dbd34 | 638 | /* Create a new register for CSE opportunities. */ |
b3a13419 | 639 | rtx hi_reg = (!can_create_pseudo_p () ? reg : gen_reg_rtx (Pmode)); |
4f8dbd34 AP |
640 | emit_insn (gen_macho_high (hi_reg, orig)); |
641 | emit_insn (gen_macho_low (reg, hi_reg, orig)); | |
fee3eacd IS |
642 | return reg; |
643 | } | |
644 | else if (DARWIN_X86) | |
645 | return orig; | |
646 | else | |
ab82a49f | 647 | /* some other cpu -- writeme! */ |
992d08b1 | 648 | gcc_unreachable (); |
ab82a49f AP |
649 | } |
650 | else if (defined) | |
ee890fe2 | 651 | { |
fee3eacd IS |
652 | rtx offset = NULL; |
653 | if (DARWIN_PPC || HAVE_lo_sum) | |
654 | offset = machopic_gen_offset (orig); | |
ee890fe2 | 655 | |
fee3eacd IS |
656 | if (DARWIN_PPC) |
657 | { | |
b3a13419 ILT |
658 | rtx hi_sum_reg = (!can_create_pseudo_p () |
659 | ? reg | |
660 | : gen_reg_rtx (Pmode)); | |
ee890fe2 | 661 | |
992d08b1 | 662 | gcc_assert (reg); |
ee890fe2 | 663 | |
f7df4a84 | 664 | emit_insn (gen_rtx_SET (hi_sum_reg, |
6f94a68e GK |
665 | gen_rtx_PLUS (Pmode, pic_offset_table_rtx, |
666 | gen_rtx_HIGH (Pmode, offset)))); | |
f7df4a84 | 667 | emit_insn (gen_rtx_SET (reg, |
bc211e05 JH |
668 | gen_rtx_LO_SUM (Pmode, hi_sum_reg, |
669 | copy_rtx (offset)))); | |
ee890fe2 SS |
670 | |
671 | orig = reg; | |
fee3eacd IS |
672 | } |
673 | else if (HAVE_lo_sum) | |
674 | { | |
992d08b1 | 675 | gcc_assert (reg); |
ee890fe2 | 676 | |
f7df4a84 RS |
677 | emit_insn (gen_rtx_SET (reg, gen_rtx_HIGH (Pmode, offset))); |
678 | emit_insn (gen_rtx_SET (reg, gen_rtx_LO_SUM (Pmode, reg, | |
679 | copy_rtx (offset)))); | |
c41c1387 | 680 | emit_use (pic_offset_table_rtx); |
ee890fe2 | 681 | |
6f94a68e | 682 | orig = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, reg); |
fee3eacd | 683 | } |
ee890fe2 SS |
684 | return orig; |
685 | } | |
686 | ||
828a4fe4 | 687 | ptr_ref = (gen_rtx_SYMBOL_REF |
083cad55 | 688 | (Pmode, |
11abc112 | 689 | machopic_indirection_name (orig, /*stub_p=*/false))); |
ee890fe2 | 690 | |
c185c797 | 691 | SYMBOL_REF_DATA (ptr_ref) = SYMBOL_REF_DATA (orig); |
c0d594f1 | 692 | |
542a8afa | 693 | ptr_ref = gen_const_mem (Pmode, ptr_ref); |
828a4fe4 | 694 | machopic_define_symbol (ptr_ref); |
ee890fe2 | 695 | |
fee3eacd IS |
696 | if (DARWIN_X86 |
697 | && reg | |
698 | && MACHO_DYNAMIC_NO_PIC_P) | |
699 | { | |
f7df4a84 | 700 | emit_insn (gen_rtx_SET (reg, ptr_ref)); |
fee3eacd IS |
701 | ptr_ref = reg; |
702 | } | |
703 | ||
ee890fe2 SS |
704 | return ptr_ref; |
705 | } | |
706 | else if (GET_CODE (orig) == CONST) | |
707 | { | |
fee3eacd IS |
708 | /* If "(const (plus ...", walk the PLUS and return that result. |
709 | PLUS processing (below) will restore the "(const ..." if | |
710 | appropriate. */ | |
ee890fe2 | 711 | if (GET_CODE (XEXP (orig, 0)) == PLUS) |
fee3eacd IS |
712 | return machopic_indirect_data_reference (XEXP (orig, 0), reg); |
713 | else | |
714 | return orig; | |
715 | } | |
716 | else if (GET_CODE (orig) == MEM) | |
717 | { | |
718 | XEXP (ptr_ref, 0) = | |
719 | machopic_indirect_data_reference (XEXP (orig, 0), reg); | |
720 | return ptr_ref; | |
721 | } | |
722 | else if (GET_CODE (orig) == PLUS) | |
723 | { | |
724 | rtx base, result; | |
725 | /* When the target is i386, this code prevents crashes due to the | |
726 | compiler's ignorance on how to move the PIC base register to | |
727 | other registers. (The reload phase sometimes introduces such | |
728 | insns.) */ | |
729 | if (GET_CODE (XEXP (orig, 0)) == REG | |
730 | && REGNO (XEXP (orig, 0)) == PIC_OFFSET_TABLE_REGNUM | |
731 | /* Prevent the same register from being erroneously used | |
732 | as both the base and index registers. */ | |
733 | && (DARWIN_X86 && (GET_CODE (XEXP (orig, 1)) == CONST)) | |
734 | && reg) | |
ee890fe2 | 735 | { |
fee3eacd IS |
736 | emit_move_insn (reg, XEXP (orig, 0)); |
737 | XEXP (ptr_ref, 0) = reg; | |
738 | return ptr_ref; | |
ee890fe2 | 739 | } |
ee890fe2 | 740 | |
fee3eacd IS |
741 | /* Legitimize both operands of the PLUS. */ |
742 | base = machopic_indirect_data_reference (XEXP (orig, 0), reg); | |
743 | orig = machopic_indirect_data_reference (XEXP (orig, 1), | |
744 | (base == reg ? 0 : reg)); | |
745 | if (MACHOPIC_INDIRECT && (GET_CODE (orig) == CONST_INT)) | |
0a81f074 | 746 | result = plus_constant (Pmode, base, INTVAL (orig)); |
ee890fe2 | 747 | else |
6f94a68e | 748 | result = gen_rtx_PLUS (Pmode, base, orig); |
ee890fe2 | 749 | |
ee890fe2 SS |
750 | if (MACHOPIC_JUST_INDIRECT && GET_CODE (base) == MEM) |
751 | { | |
752 | if (reg) | |
753 | { | |
754 | emit_move_insn (reg, result); | |
755 | result = reg; | |
756 | } | |
757 | else | |
758 | { | |
759 | result = force_reg (GET_MODE (result), result); | |
760 | } | |
761 | } | |
762 | ||
763 | return result; | |
ee890fe2 SS |
764 | } |
765 | return ptr_ref; | |
766 | } | |
767 | ||
ee890fe2 SS |
768 | /* Transform TARGET (a MEM), which is a function call target, to the |
769 | corresponding symbol_stub if necessary. Return a new MEM. */ | |
770 | ||
771 | rtx | |
9c808aad | 772 | machopic_indirect_call_target (rtx target) |
ee890fe2 | 773 | { |
9005471b IS |
774 | if (! darwin_emit_branch_islands) |
775 | return target; | |
776 | ||
ee890fe2 SS |
777 | if (GET_CODE (target) != MEM) |
778 | return target; | |
779 | ||
083cad55 | 780 | if (MACHOPIC_INDIRECT |
11abc112 MM |
781 | && GET_CODE (XEXP (target, 0)) == SYMBOL_REF |
782 | && !(SYMBOL_REF_FLAGS (XEXP (target, 0)) | |
783 | & MACHO_SYMBOL_FLAG_DEFINED)) | |
9c808aad | 784 | { |
11abc112 | 785 | rtx sym_ref = XEXP (target, 0); |
083cad55 | 786 | const char *stub_name = machopic_indirection_name (sym_ref, |
11abc112 | 787 | /*stub_p=*/true); |
ef4bddc2 | 788 | machine_mode mode = GET_MODE (sym_ref); |
083cad55 | 789 | |
11abc112 | 790 | XEXP (target, 0) = gen_rtx_SYMBOL_REF (mode, stub_name); |
c185c797 | 791 | SYMBOL_REF_DATA (XEXP (target, 0)) = SYMBOL_REF_DATA (sym_ref); |
389fdba0 | 792 | MEM_READONLY_P (target) = 1; |
542a8afa | 793 | MEM_NOTRAP_P (target) = 1; |
ee890fe2 SS |
794 | } |
795 | ||
796 | return target; | |
797 | } | |
798 | ||
799 | rtx | |
ef4bddc2 | 800 | machopic_legitimize_pic_address (rtx orig, machine_mode mode, rtx reg) |
ee890fe2 SS |
801 | { |
802 | rtx pic_ref = orig; | |
803 | ||
ab82a49f | 804 | if (! MACHOPIC_INDIRECT) |
ee890fe2 SS |
805 | return orig; |
806 | ||
807 | /* First handle a simple SYMBOL_REF or LABEL_REF */ | |
808 | if (GET_CODE (orig) == LABEL_REF | |
809 | || (GET_CODE (orig) == SYMBOL_REF | |
810 | )) | |
811 | { | |
812 | /* addr(foo) = &func+(foo-func) */ | |
ee890fe2 SS |
813 | orig = machopic_indirect_data_reference (orig, reg); |
814 | ||
9c808aad | 815 | if (GET_CODE (orig) == PLUS |
ee890fe2 SS |
816 | && GET_CODE (XEXP (orig, 0)) == REG) |
817 | { | |
818 | if (reg == 0) | |
819 | return force_reg (mode, orig); | |
820 | ||
821 | emit_move_insn (reg, orig); | |
822 | return reg; | |
9c808aad | 823 | } |
ee890fe2 | 824 | |
ee890fe2 SS |
825 | if (GET_CODE (orig) == MEM) |
826 | { | |
827 | if (reg == 0) | |
828 | { | |
992d08b1 NS |
829 | gcc_assert (!reload_in_progress); |
830 | reg = gen_reg_rtx (Pmode); | |
ee890fe2 | 831 | } |
9c808aad | 832 | |
fee3eacd | 833 | #if HAVE_lo_sum |
ab82a49f AP |
834 | if (MACHO_DYNAMIC_NO_PIC_P |
835 | && (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
836 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF)) | |
837 | { | |
838 | #if defined (TARGET_TOC) /* ppc */ | |
b3a13419 ILT |
839 | rtx temp_reg = (!can_create_pseudo_p () |
840 | ? reg : | |
841 | gen_reg_rtx (Pmode)); | |
ab82a49f AP |
842 | rtx asym = XEXP (orig, 0); |
843 | rtx mem; | |
844 | ||
b8a55285 | 845 | emit_insn (gen_macho_high (temp_reg, asym)); |
542a8afa | 846 | mem = gen_const_mem (GET_MODE (orig), |
bc211e05 JH |
847 | gen_rtx_LO_SUM (Pmode, temp_reg, |
848 | copy_rtx (asym))); | |
f7df4a84 | 849 | emit_insn (gen_rtx_SET (reg, mem)); |
ab82a49f | 850 | #else |
62baeb4f EC |
851 | /* Some other CPU -- WriteMe! but right now there are no other |
852 | platforms that can use dynamic-no-pic */ | |
992d08b1 | 853 | gcc_unreachable (); |
ab82a49f AP |
854 | #endif |
855 | pic_ref = reg; | |
856 | } | |
857 | else | |
9c808aad | 858 | if (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF |
ee890fe2 SS |
859 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) |
860 | { | |
08a6a74b | 861 | rtx offset = machopic_gen_offset (XEXP (orig, 0)); |
ee890fe2 SS |
862 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
863 | /* Generating a new reg may expose opportunities for | |
864 | common subexpression elimination. */ | |
b3a13419 ILT |
865 | rtx hi_sum_reg = (!can_create_pseudo_p () |
866 | ? reg | |
867 | : gen_reg_rtx (Pmode)); | |
6f94a68e GK |
868 | rtx mem; |
869 | rtx insn; | |
870 | rtx sum; | |
083cad55 | 871 | |
6f94a68e GK |
872 | sum = gen_rtx_HIGH (Pmode, offset); |
873 | if (! MACHO_DYNAMIC_NO_PIC_P) | |
874 | sum = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, sum); | |
ee890fe2 | 875 | |
f7df4a84 | 876 | emit_insn (gen_rtx_SET (hi_sum_reg, sum)); |
6f94a68e | 877 | |
542a8afa | 878 | mem = gen_const_mem (GET_MODE (orig), |
083cad55 | 879 | gen_rtx_LO_SUM (Pmode, |
bc211e05 JH |
880 | hi_sum_reg, |
881 | copy_rtx (offset))); | |
f7df4a84 | 882 | insn = emit_insn (gen_rtx_SET (reg, mem)); |
bd94cb6e | 883 | set_unique_reg_note (insn, REG_EQUAL, pic_ref); |
6f94a68e GK |
884 | |
885 | pic_ref = reg; | |
ee890fe2 | 886 | #else |
c41c1387 | 887 | emit_use (gen_rtx_REG (Pmode, PIC_OFFSET_TABLE_REGNUM)); |
6f94a68e | 888 | |
f7df4a84 | 889 | emit_insn (gen_rtx_SET (reg, |
6f94a68e | 890 | gen_rtx_HIGH (Pmode, |
083cad55 | 891 | gen_rtx_CONST (Pmode, |
6f94a68e | 892 | offset)))); |
f7df4a84 | 893 | emit_insn (gen_rtx_SET (reg, |
6f94a68e | 894 | gen_rtx_LO_SUM (Pmode, reg, |
bc211e05 JH |
895 | gen_rtx_CONST (Pmode, |
896 | copy_rtx (offset))))); | |
6f94a68e GK |
897 | pic_ref = gen_rtx_PLUS (Pmode, |
898 | pic_offset_table_rtx, reg); | |
ee890fe2 SS |
899 | #endif |
900 | } | |
901 | else | |
902 | #endif /* HAVE_lo_sum */ | |
903 | { | |
904 | rtx pic = pic_offset_table_rtx; | |
905 | if (GET_CODE (pic) != REG) | |
906 | { | |
907 | emit_move_insn (reg, pic); | |
908 | pic = reg; | |
909 | } | |
910 | #if 0 | |
c41c1387 | 911 | emit_use (gen_rtx_REG (Pmode, PIC_OFFSET_TABLE_REGNUM)); |
ee890fe2 SS |
912 | #endif |
913 | ||
7d072037 | 914 | if (reload_in_progress) |
6fb5fa3c | 915 | df_set_regs_ever_live (REGNO (pic), true); |
14a07c92 | 916 | pic_ref = gen_rtx_PLUS (Pmode, pic, |
08a6a74b | 917 | machopic_gen_offset (XEXP (orig, 0))); |
ee890fe2 | 918 | } |
9c808aad | 919 | |
ee890fe2 | 920 | #if !defined (TARGET_TOC) |
ee890fe2 | 921 | emit_move_insn (reg, pic_ref); |
542a8afa | 922 | pic_ref = gen_const_mem (GET_MODE (orig), reg); |
f9b0ac3b | 923 | #endif |
ee890fe2 SS |
924 | } |
925 | else | |
926 | { | |
927 | ||
fee3eacd | 928 | #if HAVE_lo_sum |
9c808aad | 929 | if (GET_CODE (orig) == SYMBOL_REF |
ee890fe2 SS |
930 | || GET_CODE (orig) == LABEL_REF) |
931 | { | |
08a6a74b | 932 | rtx offset = machopic_gen_offset (orig); |
ee890fe2 SS |
933 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
934 | rtx hi_sum_reg; | |
935 | ||
936 | if (reg == 0) | |
937 | { | |
992d08b1 NS |
938 | gcc_assert (!reload_in_progress); |
939 | reg = gen_reg_rtx (Pmode); | |
ee890fe2 | 940 | } |
9c808aad | 941 | |
ee890fe2 SS |
942 | hi_sum_reg = reg; |
943 | ||
f7df4a84 | 944 | emit_insn (gen_rtx_SET (hi_sum_reg, |
6f94a68e GK |
945 | (MACHO_DYNAMIC_NO_PIC_P) |
946 | ? gen_rtx_HIGH (Pmode, offset) | |
947 | : gen_rtx_PLUS (Pmode, | |
948 | pic_offset_table_rtx, | |
083cad55 | 949 | gen_rtx_HIGH (Pmode, |
6f94a68e | 950 | offset)))); |
f7df4a84 | 951 | emit_insn (gen_rtx_SET (reg, |
6f94a68e | 952 | gen_rtx_LO_SUM (Pmode, |
bc211e05 JH |
953 | hi_sum_reg, |
954 | copy_rtx (offset)))); | |
ee890fe2 SS |
955 | pic_ref = reg; |
956 | #else | |
f7df4a84 RS |
957 | emit_insn (gen_rtx_SET (reg, gen_rtx_HIGH (Pmode, offset))); |
958 | emit_insn (gen_rtx_SET (reg, | |
bc211e05 JH |
959 | gen_rtx_LO_SUM (Pmode, reg, |
960 | copy_rtx (offset)))); | |
6f94a68e GK |
961 | pic_ref = gen_rtx_PLUS (Pmode, |
962 | pic_offset_table_rtx, reg); | |
ee890fe2 SS |
963 | #endif |
964 | } | |
965 | else | |
966 | #endif /* HAVE_lo_sum */ | |
967 | { | |
83cf88cb AP |
968 | if (REG_P (orig) |
969 | || GET_CODE (orig) == SUBREG) | |
ee890fe2 SS |
970 | { |
971 | return orig; | |
972 | } | |
973 | else | |
974 | { | |
975 | rtx pic = pic_offset_table_rtx; | |
976 | if (GET_CODE (pic) != REG) | |
977 | { | |
978 | emit_move_insn (reg, pic); | |
979 | pic = reg; | |
980 | } | |
981 | #if 0 | |
c41c1387 | 982 | emit_use (pic_offset_table_rtx); |
ee890fe2 | 983 | #endif |
7d072037 | 984 | if (reload_in_progress) |
6fb5fa3c | 985 | df_set_regs_ever_live (REGNO (pic), true); |
6f94a68e GK |
986 | pic_ref = gen_rtx_PLUS (Pmode, |
987 | pic, | |
08a6a74b | 988 | machopic_gen_offset (orig)); |
ee890fe2 SS |
989 | } |
990 | } | |
991 | } | |
992 | ||
ee890fe2 SS |
993 | if (GET_CODE (pic_ref) != REG) |
994 | { | |
995 | if (reg != 0) | |
996 | { | |
997 | emit_move_insn (reg, pic_ref); | |
998 | return reg; | |
999 | } | |
1000 | else | |
1001 | { | |
1002 | return force_reg (mode, pic_ref); | |
1003 | } | |
1004 | } | |
1005 | else | |
1006 | { | |
1007 | return pic_ref; | |
1008 | } | |
1009 | } | |
1010 | ||
1011 | else if (GET_CODE (orig) == SYMBOL_REF) | |
1012 | return orig; | |
1013 | ||
1014 | else if (GET_CODE (orig) == PLUS | |
1015 | && (GET_CODE (XEXP (orig, 0)) == MEM | |
1016 | || GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
1017 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) | |
1018 | && XEXP (orig, 0) != pic_offset_table_rtx | |
1019 | && GET_CODE (XEXP (orig, 1)) != REG) | |
9c808aad | 1020 | |
ee890fe2 SS |
1021 | { |
1022 | rtx base; | |
1023 | int is_complex = (GET_CODE (XEXP (orig, 0)) == MEM); | |
1024 | ||
1025 | base = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
1026 | orig = machopic_legitimize_pic_address (XEXP (orig, 1), | |
1027 | Pmode, (base == reg ? 0 : reg)); | |
1028 | if (GET_CODE (orig) == CONST_INT) | |
1029 | { | |
0a81f074 | 1030 | pic_ref = plus_constant (Pmode, base, INTVAL (orig)); |
ee890fe2 SS |
1031 | is_complex = 1; |
1032 | } | |
1033 | else | |
6f94a68e | 1034 | pic_ref = gen_rtx_PLUS (Pmode, base, orig); |
ee890fe2 | 1035 | |
ee890fe2 SS |
1036 | if (reg && is_complex) |
1037 | { | |
1038 | emit_move_insn (reg, pic_ref); | |
1039 | pic_ref = reg; | |
1040 | } | |
1041 | /* Likewise, should we set special REG_NOTEs here? */ | |
1042 | } | |
1043 | ||
1044 | else if (GET_CODE (orig) == CONST) | |
1045 | { | |
1046 | return machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
1047 | } | |
1048 | ||
1049 | else if (GET_CODE (orig) == MEM | |
1050 | && GET_CODE (XEXP (orig, 0)) == SYMBOL_REF) | |
1051 | { | |
1052 | rtx addr = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
389fdba0 | 1053 | addr = replace_equiv_address (orig, addr); |
ee890fe2 SS |
1054 | emit_move_insn (reg, addr); |
1055 | pic_ref = reg; | |
1056 | } | |
1057 | ||
1058 | return pic_ref; | |
1059 | } | |
1060 | ||
11abc112 MM |
1061 | /* Output the stub or non-lazy pointer in *SLOT, if it has been used. |
1062 | DATA is the FILE* for assembly output. Called from | |
1063 | htab_traverse. */ | |
ee890fe2 | 1064 | |
2a22f99c TS |
1065 | int |
1066 | machopic_output_indirection (machopic_indirection **slot, FILE *asm_out_file) | |
ee890fe2 | 1067 | { |
2a22f99c | 1068 | machopic_indirection *p = *slot; |
11abc112 MM |
1069 | rtx symbol; |
1070 | const char *sym_name; | |
1071 | const char *ptr_name; | |
083cad55 | 1072 | |
11abc112 MM |
1073 | if (!p->used) |
1074 | return 1; | |
ee890fe2 | 1075 | |
11abc112 MM |
1076 | symbol = p->symbol; |
1077 | sym_name = XSTR (symbol, 0); | |
1adaa117 | 1078 | ptr_name = p->ptr_name; |
083cad55 | 1079 | |
11abc112 | 1080 | if (p->stub_p) |
ee890fe2 | 1081 | { |
ee890fe2 SS |
1082 | char *sym; |
1083 | char *stub; | |
0a6a4494 AO |
1084 | tree id; |
1085 | ||
1086 | id = maybe_get_identifier (sym_name); | |
1087 | if (id) | |
1088 | { | |
1089 | tree id_orig = id; | |
1090 | ||
1091 | while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
1092 | id = TREE_CHAIN (id); | |
1093 | if (id != id_orig) | |
1094 | sym_name = IDENTIFIER_POINTER (id); | |
1095 | } | |
ee890fe2 | 1096 | |
5ead67f6 | 1097 | sym = XALLOCAVEC (char, strlen (sym_name) + 2); |
ee890fe2 SS |
1098 | if (sym_name[0] == '*' || sym_name[0] == '&') |
1099 | strcpy (sym, sym_name + 1); | |
1100 | else if (sym_name[0] == '-' || sym_name[0] == '+') | |
9c808aad | 1101 | strcpy (sym, sym_name); |
ee890fe2 | 1102 | else |
789a4ea3 | 1103 | sprintf (sym, "%s%s", user_label_prefix, sym_name); |
ee890fe2 | 1104 | |
5ead67f6 | 1105 | stub = XALLOCAVEC (char, strlen (ptr_name) + 2); |
11abc112 MM |
1106 | if (ptr_name[0] == '*' || ptr_name[0] == '&') |
1107 | strcpy (stub, ptr_name + 1); | |
ee890fe2 | 1108 | else |
11abc112 | 1109 | sprintf (stub, "%s%s", user_label_prefix, ptr_name); |
ee890fe2 | 1110 | |
ca472546 | 1111 | machopic_output_stub (asm_out_file, sym, stub); |
ee890fe2 | 1112 | } |
699c914a | 1113 | else if (! indirect_data (symbol) |
156a126c MS |
1114 | && (machopic_symbol_defined_p (symbol) |
1115 | || SYMBOL_REF_LOCAL_P (symbol))) | |
ee890fe2 | 1116 | { |
d6b5193b | 1117 | switch_to_section (data_section); |
11abc112 | 1118 | assemble_align (GET_MODE_ALIGNMENT (Pmode)); |
e4f7c483 | 1119 | assemble_label (asm_out_file, ptr_name); |
11abc112 MM |
1120 | assemble_integer (gen_rtx_SYMBOL_REF (Pmode, sym_name), |
1121 | GET_MODE_SIZE (Pmode), | |
1122 | GET_MODE_ALIGNMENT (Pmode), 1); | |
ee890fe2 | 1123 | } |
11abc112 MM |
1124 | else |
1125 | { | |
699c914a MS |
1126 | rtx init = const0_rtx; |
1127 | ||
56c779bc | 1128 | switch_to_section (darwin_sections[machopic_nl_symbol_ptr_section]); |
c70d0414 HPN |
1129 | |
1130 | /* Mach-O symbols are passed around in code through indirect | |
1131 | references and the original symbol_ref hasn't passed through | |
1132 | the generic handling and reference-catching in | |
1133 | output_operand, so we need to manually mark weak references | |
1134 | as such. */ | |
1135 | if (SYMBOL_REF_WEAK (symbol)) | |
1136 | { | |
1137 | tree decl = SYMBOL_REF_DECL (symbol); | |
1138 | gcc_assert (DECL_P (decl)); | |
1139 | ||
1140 | if (decl != NULL_TREE | |
1141 | && DECL_EXTERNAL (decl) && TREE_PUBLIC (decl) | |
1142 | /* Handle only actual external-only definitions, not | |
1143 | e.g. extern inline code or variables for which | |
1144 | storage has been allocated. */ | |
1145 | && !TREE_STATIC (decl)) | |
1146 | { | |
1147 | fputs ("\t.weak_reference ", asm_out_file); | |
1148 | assemble_name (asm_out_file, sym_name); | |
1149 | fputc ('\n', asm_out_file); | |
1150 | } | |
1151 | } | |
1152 | ||
11abc112 MM |
1153 | assemble_name (asm_out_file, ptr_name); |
1154 | fprintf (asm_out_file, ":\n"); | |
083cad55 | 1155 | |
11abc112 MM |
1156 | fprintf (asm_out_file, "\t.indirect_symbol "); |
1157 | assemble_name (asm_out_file, sym_name); | |
1158 | fprintf (asm_out_file, "\n"); | |
083cad55 | 1159 | |
699c914a MS |
1160 | /* Variables that are marked with MACHO_SYMBOL_STATIC need to |
1161 | have their symbol name instead of 0 in the second entry of | |
1162 | the non-lazy symbol pointer data structure when they are | |
1163 | defined. This allows the runtime to rebind newer instances | |
1164 | of the translation unit with the original instance of the | |
d6ff8575 | 1165 | symbol. */ |
699c914a MS |
1166 | |
1167 | if ((SYMBOL_REF_FLAGS (symbol) & MACHO_SYMBOL_STATIC) | |
1168 | && machopic_symbol_defined_p (symbol)) | |
1169 | init = gen_rtx_SYMBOL_REF (Pmode, sym_name); | |
1170 | ||
1171 | assemble_integer (init, GET_MODE_SIZE (Pmode), | |
11abc112 MM |
1172 | GET_MODE_ALIGNMENT (Pmode), 1); |
1173 | } | |
083cad55 | 1174 | |
11abc112 MM |
1175 | return 1; |
1176 | } | |
1177 | ||
1178 | void | |
1179 | machopic_finish (FILE *asm_out_file) | |
1180 | { | |
1181 | if (machopic_indirections) | |
2a22f99c TS |
1182 | machopic_indirections |
1183 | ->traverse_noresize<FILE *, machopic_output_indirection> (asm_out_file); | |
ee890fe2 SS |
1184 | } |
1185 | ||
9c808aad AJ |
1186 | int |
1187 | machopic_operand_p (rtx op) | |
ee890fe2 SS |
1188 | { |
1189 | if (MACHOPIC_JUST_INDIRECT) | |
08a6a74b RS |
1190 | return (GET_CODE (op) == SYMBOL_REF |
1191 | && machopic_symbol_defined_p (op)); | |
1192 | else | |
1193 | return (GET_CODE (op) == CONST | |
1194 | && GET_CODE (XEXP (op, 0)) == UNSPEC | |
1195 | && XINT (XEXP (op, 0), 1) == UNSPEC_MACHOPIC_OFFSET); | |
ee890fe2 | 1196 | } |
df56a27f SS |
1197 | |
1198 | /* This function records whether a given name corresponds to a defined | |
1199 | or undefined function or variable, for machopic_classify_ident to | |
1200 | use later. */ | |
1201 | ||
1202 | void | |
9c808aad | 1203 | darwin_encode_section_info (tree decl, rtx rtl, int first ATTRIBUTE_UNUSED) |
df56a27f | 1204 | { |
353e51f8 | 1205 | rtx sym_ref; |
df56a27f | 1206 | |
e1a4211d SS |
1207 | /* Do the standard encoding things first. */ |
1208 | default_encode_section_info (decl, rtl, first); | |
1209 | ||
11abc112 MM |
1210 | if (TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL) |
1211 | return; | |
e1a4211d | 1212 | |
11abc112 MM |
1213 | sym_ref = XEXP (rtl, 0); |
1214 | if (TREE_CODE (decl) == VAR_DECL) | |
1215 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_VARIABLE; | |
1216 | ||
1217 | if (!DECL_EXTERNAL (decl) | |
f1a66265 | 1218 | && (!TREE_PUBLIC (decl) || !DECL_WEAK (decl)) |
a9b0b825 | 1219 | && ! lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)) |
df56a27f SS |
1220 | && ((TREE_STATIC (decl) |
1221 | && (!DECL_COMMON (decl) || !TREE_PUBLIC (decl))) | |
bfbdca0b | 1222 | || (!DECL_COMMON (decl) && DECL_INITIAL (decl) |
abe72dd8 | 1223 | && DECL_INITIAL (decl) != error_mark_node))) |
11abc112 | 1224 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; |
699c914a | 1225 | |
d6ff8575 | 1226 | if (! TREE_PUBLIC (decl)) |
699c914a | 1227 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_STATIC; |
4e08ba6c | 1228 | } |
2cc07db4 | 1229 | |
8e3e233b DP |
1230 | void |
1231 | darwin_mark_decl_preserved (const char *name) | |
1232 | { | |
3c5f0425 IS |
1233 | /* Actually we shouldn't mark any local symbol this way, but for now |
1234 | this only happens with ObjC meta-data. */ | |
1235 | if (darwin_label_is_anonymous_local_objc_name (name)) | |
1236 | return; | |
1237 | ||
83bf7f5e | 1238 | fprintf (asm_out_file, "\t.no_dead_strip "); |
8e3e233b DP |
1239 | assemble_name (asm_out_file, name); |
1240 | fputc ('\n', asm_out_file); | |
1241 | } | |
1242 | ||
59ff4a1c | 1243 | static section * |
46a99b06 | 1244 | darwin_rodata_section (int weak, bool zsize) |
59ff4a1c EC |
1245 | { |
1246 | return (weak | |
1247 | ? darwin_sections[const_coal_section] | |
46a99b06 IS |
1248 | : (zsize ? darwin_sections[zobj_const_section] |
1249 | : darwin_sections[const_section])); | |
59ff4a1c | 1250 | } |
9c808aad | 1251 | |
59ff4a1c EC |
1252 | static section * |
1253 | darwin_mergeable_string_section (tree exp, | |
1254 | unsigned HOST_WIDE_INT align) | |
1255 | { | |
a45a766b IS |
1256 | /* Darwin's ld expects to see non-writable string literals in the .cstring |
1257 | section. Later versions of ld check and complain when CFStrings are | |
1258 | enabled. Therefore we shall force the strings into .cstring since we | |
1259 | don't support writable ones anyway. */ | |
1260 | if ((darwin_constant_cfstrings || flag_merge_constants) | |
59ff4a1c EC |
1261 | && TREE_CODE (exp) == STRING_CST |
1262 | && TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE | |
1263 | && align <= 256 | |
b69d564b JJ |
1264 | && (int_size_in_bytes (TREE_TYPE (exp)) |
1265 | == TREE_STRING_LENGTH (exp)) | |
9c808aad | 1266 | && ((size_t) TREE_STRING_LENGTH (exp) |
3521b33c | 1267 | == strlen (TREE_STRING_POINTER (exp)) + 1)) |
56c779bc | 1268 | return darwin_sections[cstring_section]; |
59ff4a1c | 1269 | |
46a99b06 IS |
1270 | if (DARWIN_SECTION_ANCHORS && flag_section_anchors |
1271 | && TREE_CODE (exp) == STRING_CST | |
1272 | && TREE_STRING_LENGTH (exp) == 0) | |
1273 | return darwin_sections[zobj_const_section]; | |
1274 | ||
59ff4a1c EC |
1275 | return readonly_data_section; |
1276 | } | |
1277 | ||
5708d18d MS |
1278 | #ifndef HAVE_GAS_LITERAL16 |
1279 | #define HAVE_GAS_LITERAL16 0 | |
1280 | #endif | |
1281 | ||
59ff4a1c EC |
1282 | static section * |
1283 | darwin_mergeable_constant_section (tree exp, | |
46a99b06 IS |
1284 | unsigned HOST_WIDE_INT align, |
1285 | bool zsize) | |
59ff4a1c | 1286 | { |
ef4bddc2 | 1287 | machine_mode mode = DECL_MODE (exp); |
59ff4a1c EC |
1288 | unsigned int modesize = GET_MODE_BITSIZE (mode); |
1289 | ||
46a99b06 IS |
1290 | if (DARWIN_SECTION_ANCHORS |
1291 | && flag_section_anchors | |
1292 | && zsize) | |
1293 | return darwin_sections[zobj_const_section]; | |
1294 | ||
59ff4a1c EC |
1295 | if (flag_merge_constants |
1296 | && mode != VOIDmode | |
1297 | && mode != BLKmode | |
1298 | && modesize <= align | |
1299 | && align >= 8 | |
1300 | && align <= 256 | |
1301 | && (align & (align -1)) == 0) | |
ae46c4e0 | 1302 | { |
e1e04267 | 1303 | tree size = TYPE_SIZE_UNIT (TREE_TYPE (exp)); |
ae46c4e0 | 1304 | |
807e902e KZ |
1305 | if (TREE_CODE (size) == INTEGER_CST) |
1306 | { | |
1307 | if (wi::eq_p (size, 4)) | |
1308 | return darwin_sections[literal4_section]; | |
1309 | else if (wi::eq_p (size, 8)) | |
1310 | return darwin_sections[literal8_section]; | |
1311 | else if (HAVE_GAS_LITERAL16 | |
1312 | && TARGET_64BIT | |
1313 | && wi::eq_p (size, 16)) | |
1314 | return darwin_sections[literal16_section]; | |
1315 | } | |
59ff4a1c EC |
1316 | } |
1317 | ||
1318 | return readonly_data_section; | |
1319 | } | |
1320 | ||
50b0b78a IS |
1321 | section * |
1322 | darwin_tm_clone_table_section (void) | |
1323 | { | |
1324 | return get_named_section (NULL, | |
1325 | "__DATA,__tm_clone_table,regular,no_dead_strip", | |
1326 | 3); | |
1327 | } | |
1328 | ||
24c78b3a RH |
1329 | int |
1330 | machopic_reloc_rw_mask (void) | |
1331 | { | |
1332 | return MACHOPIC_INDIRECT ? 3 : 0; | |
1333 | } | |
1334 | ||
d764a8e6 IS |
1335 | /* We have to deal with ObjC/C++ metadata section placement in the common |
1336 | code, since it will also be called from LTO. | |
1337 | ||
1338 | Return metadata attributes, if present (searching for ABI=2 first) | |
1339 | Return NULL_TREE if no such attributes are found. */ | |
1340 | ||
1341 | static tree | |
1342 | is_objc_metadata (tree decl) | |
1343 | { | |
1344 | if (DECL_P (decl) | |
1345 | && (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == CONST_DECL) | |
1346 | && DECL_ATTRIBUTES (decl)) | |
1347 | { | |
1348 | tree meta = lookup_attribute ("OBJC2META", DECL_ATTRIBUTES (decl)); | |
1349 | if (meta) | |
1350 | return meta; | |
1351 | meta = lookup_attribute ("OBJC1META", DECL_ATTRIBUTES (decl)); | |
1352 | if (meta) | |
1353 | return meta; | |
1354 | } | |
1355 | return NULL_TREE; | |
1356 | } | |
1357 | ||
fb5610fb IS |
1358 | static int classes_seen; |
1359 | static int objc_metadata_seen; | |
1360 | ||
d764a8e6 IS |
1361 | /* Return the section required for Objective C ABI 2 metadata. */ |
1362 | static section * | |
1363 | darwin_objc2_section (tree decl ATTRIBUTE_UNUSED, tree meta, section * base) | |
1364 | { | |
1365 | const char *p; | |
1366 | tree ident = TREE_VALUE (meta); | |
1367 | gcc_assert (TREE_CODE (ident) == IDENTIFIER_NODE); | |
1368 | p = IDENTIFIER_POINTER (ident); | |
1369 | ||
fb5610fb | 1370 | gcc_checking_assert (flag_next_runtime == 1 && flag_objc_abi == 2); |
d764a8e6 | 1371 | |
fb5610fb | 1372 | objc_metadata_seen = 1; |
d764a8e6 IS |
1373 | |
1374 | if (base == data_section) | |
1375 | base = darwin_sections[objc2_metadata_section]; | |
1376 | ||
1377 | /* Most of the OBJC2 META-data end up in the base section, so check it | |
1378 | first. */ | |
1379 | if (!strncmp (p, "V2_BASE", 7)) | |
1380 | return base; | |
1381 | else if (!strncmp (p, "V2_STRG", 7)) | |
1382 | return darwin_sections[cstring_section]; | |
1383 | ||
1384 | else if (!strncmp (p, "G2_META", 7) || !strncmp (p, "G2_CLAS", 7)) | |
1385 | return darwin_sections[objc2_classdefs_section]; | |
1386 | else if (!strncmp (p, "V2_MREF", 7)) | |
1387 | return darwin_sections[objc2_message_refs_section]; | |
1388 | else if (!strncmp (p, "V2_CLRF", 7)) | |
1389 | return darwin_sections[objc2_classrefs_section]; | |
1390 | else if (!strncmp (p, "V2_SURF", 7)) | |
1391 | return darwin_sections[objc2_super_classrefs_section]; | |
1392 | else if (!strncmp (p, "V2_NLCL", 7)) | |
1393 | return darwin_sections[objc2_nonlazy_class_section]; | |
1394 | else if (!strncmp (p, "V2_CLAB", 7)) | |
fb5610fb IS |
1395 | { |
1396 | classes_seen = 1; | |
1397 | return darwin_sections[objc2_classlist_section]; | |
1398 | } | |
d764a8e6 IS |
1399 | else if (!strncmp (p, "V2_SRFS", 7)) |
1400 | return darwin_sections[objc2_selector_refs_section]; | |
1401 | else if (!strncmp (p, "V2_NLCA", 7)) | |
1402 | return darwin_sections[objc2_nonlazy_category_section]; | |
1403 | else if (!strncmp (p, "V2_CALA", 7)) | |
1404 | return darwin_sections[objc2_categorylist_section]; | |
1405 | ||
1406 | else if (!strncmp (p, "V2_PLST", 7)) | |
1407 | return darwin_sections[objc2_protocollist_section]; | |
1408 | else if (!strncmp (p, "V2_PRFS", 7)) | |
1409 | return darwin_sections[objc2_protocolrefs_section]; | |
1410 | ||
1411 | else if (!strncmp (p, "V2_INFO", 7)) | |
1412 | return darwin_sections[objc2_image_info_section]; | |
1413 | ||
1414 | else if (!strncmp (p, "V2_EHTY", 7)) | |
1415 | return darwin_sections[data_coal_section]; | |
1416 | ||
1417 | else if (!strncmp (p, "V2_CSTR", 7)) | |
1418 | return darwin_sections[objc2_constant_string_object_section]; | |
1419 | ||
1420 | /* Not recognized, default. */ | |
1421 | return base; | |
1422 | } | |
1423 | ||
1424 | /* Return the section required for Objective C ABI 0/1 metadata. */ | |
1425 | static section * | |
1426 | darwin_objc1_section (tree decl ATTRIBUTE_UNUSED, tree meta, section * base) | |
1427 | { | |
1428 | const char *p; | |
1429 | tree ident = TREE_VALUE (meta); | |
1430 | gcc_assert (TREE_CODE (ident) == IDENTIFIER_NODE); | |
1431 | p = IDENTIFIER_POINTER (ident); | |
1432 | ||
fb5610fb IS |
1433 | gcc_checking_assert (flag_next_runtime == 1 && flag_objc_abi < 2); |
1434 | ||
1435 | objc_metadata_seen = 1; | |
d764a8e6 IS |
1436 | |
1437 | /* String sections first, cos there are lots of strings. */ | |
1438 | if (!strncmp (p, "V1_STRG", 7)) | |
1439 | return darwin_sections[cstring_section]; | |
1440 | else if (!strncmp (p, "V1_CLSN", 7)) | |
1441 | return darwin_sections[objc_class_names_section]; | |
1442 | else if (!strncmp (p, "V1_METN", 7)) | |
1443 | return darwin_sections[objc_meth_var_names_section]; | |
1444 | else if (!strncmp (p, "V1_METT", 7)) | |
1445 | return darwin_sections[objc_meth_var_types_section]; | |
1446 | ||
1447 | else if (!strncmp (p, "V1_CLAS", 7)) | |
fb5610fb IS |
1448 | { |
1449 | classes_seen = 1; | |
1450 | return darwin_sections[objc_class_section]; | |
1451 | } | |
d764a8e6 IS |
1452 | else if (!strncmp (p, "V1_META", 7)) |
1453 | return darwin_sections[objc_meta_class_section]; | |
1454 | else if (!strncmp (p, "V1_CATG", 7)) | |
1455 | return darwin_sections[objc_category_section]; | |
1456 | else if (!strncmp (p, "V1_PROT", 7)) | |
1457 | return darwin_sections[objc_protocol_section]; | |
1458 | ||
1459 | else if (!strncmp (p, "V1_CLCV", 7)) | |
1460 | return darwin_sections[objc_class_vars_section]; | |
1461 | else if (!strncmp (p, "V1_CLIV", 7)) | |
1462 | return darwin_sections[objc_instance_vars_section]; | |
1463 | ||
1464 | else if (!strncmp (p, "V1_CLCM", 7)) | |
1465 | return darwin_sections[objc_cls_meth_section]; | |
1466 | else if (!strncmp (p, "V1_CLIM", 7)) | |
1467 | return darwin_sections[objc_inst_meth_section]; | |
1468 | else if (!strncmp (p, "V1_CACM", 7)) | |
1469 | return darwin_sections[objc_cat_cls_meth_section]; | |
1470 | else if (!strncmp (p, "V1_CAIM", 7)) | |
1471 | return darwin_sections[objc_cat_inst_meth_section]; | |
1472 | else if (!strncmp (p, "V1_PNSM", 7)) | |
1473 | return darwin_sections[objc_cat_inst_meth_section]; | |
1474 | else if (!strncmp (p, "V1_PCLM", 7)) | |
1475 | return darwin_sections[objc_cat_cls_meth_section]; | |
1476 | ||
1477 | else if (!strncmp (p, "V1_CLPR", 7)) | |
1478 | return darwin_sections[objc_cat_cls_meth_section]; | |
1479 | else if (!strncmp (p, "V1_CAPR", 7)) | |
1480 | return darwin_sections[objc_category_section]; /* ??? CHECK me. */ | |
1481 | ||
1482 | else if (!strncmp (p, "V1_PRFS", 7)) | |
1483 | return darwin_sections[objc_cat_cls_meth_section]; | |
1484 | else if (!strncmp (p, "V1_CLRF", 7)) | |
1485 | return darwin_sections[objc_cls_refs_section]; | |
1486 | else if (!strncmp (p, "V1_SRFS", 7)) | |
1487 | return darwin_sections[objc_selector_refs_section]; | |
1488 | ||
1489 | else if (!strncmp (p, "V1_MODU", 7)) | |
1490 | return darwin_sections[objc_module_info_section]; | |
1491 | else if (!strncmp (p, "V1_SYMT", 7)) | |
1492 | return darwin_sections[objc_symbols_section]; | |
1493 | else if (!strncmp (p, "V1_INFO", 7)) | |
1494 | return darwin_sections[objc_image_info_section]; | |
1495 | ||
1496 | else if (!strncmp (p, "V1_PLST", 7)) | |
1497 | return darwin_sections[objc1_prop_list_section]; | |
1498 | else if (!strncmp (p, "V1_PEXT", 7)) | |
1499 | return darwin_sections[objc1_protocol_ext_section]; | |
1500 | else if (!strncmp (p, "V1_CEXT", 7)) | |
1501 | return darwin_sections[objc1_class_ext_section]; | |
1502 | ||
1503 | else if (!strncmp (p, "V2_CSTR", 7)) | |
1504 | return darwin_sections[objc_constant_string_object_section]; | |
1505 | ||
1506 | return base; | |
1507 | } | |
1508 | ||
59ff4a1c EC |
1509 | section * |
1510 | machopic_select_section (tree decl, | |
1511 | int reloc, | |
1512 | unsigned HOST_WIDE_INT align) | |
1513 | { | |
46a99b06 | 1514 | bool zsize, one, weak, ro; |
f16d3f39 | 1515 | section *base_section = NULL; |
59ff4a1c | 1516 | |
46a99b06 IS |
1517 | weak = (DECL_P (decl) |
1518 | && DECL_WEAK (decl) | |
1519 | && !lookup_attribute ("weak_import", DECL_ATTRIBUTES (decl))); | |
1520 | ||
1521 | zsize = (DECL_P (decl) | |
1522 | && (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == CONST_DECL) | |
ae7e9ddd | 1523 | && tree_to_uhwi (DECL_SIZE_UNIT (decl)) == 0); |
46a99b06 IS |
1524 | |
1525 | one = DECL_P (decl) | |
1526 | && TREE_CODE (decl) == VAR_DECL | |
cf288ed3 | 1527 | && DECL_COMDAT_GROUP (decl); |
46a99b06 IS |
1528 | |
1529 | ro = TREE_READONLY (decl) || TREE_CONSTANT (decl) ; | |
1530 | ||
4f648002 | 1531 | switch (categorize_decl_for_section (decl, reloc)) |
59ff4a1c EC |
1532 | { |
1533 | case SECCAT_TEXT: | |
1f81953b | 1534 | gcc_unreachable (); |
59ff4a1c EC |
1535 | break; |
1536 | ||
1537 | case SECCAT_RODATA: | |
1538 | case SECCAT_SRODATA: | |
46a99b06 | 1539 | base_section = darwin_rodata_section (weak, zsize); |
59ff4a1c EC |
1540 | break; |
1541 | ||
1542 | case SECCAT_RODATA_MERGE_STR: | |
1543 | base_section = darwin_mergeable_string_section (decl, align); | |
1544 | break; | |
1545 | ||
1546 | case SECCAT_RODATA_MERGE_STR_INIT: | |
1547 | base_section = darwin_mergeable_string_section (DECL_INITIAL (decl), align); | |
1548 | break; | |
1549 | ||
1550 | case SECCAT_RODATA_MERGE_CONST: | |
46a99b06 | 1551 | base_section = darwin_mergeable_constant_section (decl, align, zsize); |
59ff4a1c EC |
1552 | break; |
1553 | ||
1554 | case SECCAT_DATA: | |
1555 | case SECCAT_DATA_REL: | |
1556 | case SECCAT_DATA_REL_LOCAL: | |
1557 | case SECCAT_DATA_REL_RO: | |
1558 | case SECCAT_DATA_REL_RO_LOCAL: | |
1559 | case SECCAT_SDATA: | |
1560 | case SECCAT_TDATA: | |
46a99b06 IS |
1561 | if (weak || one) |
1562 | { | |
1563 | if (ro) | |
1564 | base_section = darwin_sections[const_data_coal_section]; | |
1565 | else | |
1566 | base_section = darwin_sections[data_coal_section]; | |
1567 | } | |
1568 | else if (DARWIN_SECTION_ANCHORS | |
1569 | && flag_section_anchors | |
1570 | && zsize) | |
1571 | { | |
1572 | /* If we're doing section anchors, then punt zero-sized objects into | |
1573 | their own sections so that they don't interfere with offset | |
1574 | computation for the remaining vars. This does not need to be done | |
1575 | for stuff in mergeable sections, since these are ineligible for | |
1576 | anchors. */ | |
1577 | if (ro) | |
1578 | base_section = darwin_sections[zobj_const_data_section]; | |
1579 | else | |
1580 | base_section = darwin_sections[zobj_data_section]; | |
1581 | } | |
1582 | else if (ro) | |
1583 | base_section = darwin_sections[const_data_section]; | |
1584 | else | |
1585 | base_section = data_section; | |
1586 | break; | |
59ff4a1c EC |
1587 | case SECCAT_BSS: |
1588 | case SECCAT_SBSS: | |
1589 | case SECCAT_TBSS: | |
46a99b06 IS |
1590 | if (weak || one) |
1591 | base_section = darwin_sections[data_coal_section]; | |
ae46c4e0 | 1592 | else |
46a99b06 IS |
1593 | { |
1594 | if (!TREE_PUBLIC (decl)) | |
1595 | base_section = lcomm_section; | |
1596 | else if (bss_noswitch_section) | |
1597 | base_section = bss_noswitch_section; | |
1598 | else | |
1599 | base_section = data_section; | |
1600 | } | |
59ff4a1c EC |
1601 | break; |
1602 | ||
1603 | default: | |
1604 | gcc_unreachable (); | |
ae46c4e0 | 1605 | } |
59ff4a1c | 1606 | |
d764a8e6 IS |
1607 | /* Darwin weird special cases. |
1608 | a) OBJC Meta-data. */ | |
1609 | if (DECL_P (decl) | |
1610 | && (TREE_CODE (decl) == VAR_DECL | |
1611 | || TREE_CODE (decl) == CONST_DECL) | |
1612 | && DECL_ATTRIBUTES (decl)) | |
1613 | { | |
1614 | tree meta = lookup_attribute ("OBJC2META", DECL_ATTRIBUTES (decl)); | |
1615 | if (meta) | |
1616 | return darwin_objc2_section (decl, meta, base_section); | |
1617 | meta = lookup_attribute ("OBJC1META", DECL_ATTRIBUTES (decl)); | |
1618 | if (meta) | |
1619 | return darwin_objc1_section (decl, meta, base_section); | |
1620 | meta = lookup_attribute ("OBJC1METG", DECL_ATTRIBUTES (decl)); | |
1621 | if (meta) | |
1622 | return base_section; /* GNU runtime is happy with it all in one pot. */ | |
1623 | } | |
1624 | ||
1625 | /* b) Constant string objects. */ | |
59ff4a1c EC |
1626 | if (TREE_CODE (decl) == CONSTRUCTOR |
1627 | && TREE_TYPE (decl) | |
1628 | && TREE_CODE (TREE_TYPE (decl)) == RECORD_TYPE | |
1629 | && TYPE_NAME (TREE_TYPE (decl))) | |
ae46c4e0 | 1630 | { |
59ff4a1c | 1631 | tree name = TYPE_NAME (TREE_TYPE (decl)); |
ae46c4e0 | 1632 | if (TREE_CODE (name) == TYPE_DECL) |
59ff4a1c | 1633 | name = DECL_NAME (name); |
c64de75f ZL |
1634 | |
1635 | if (!strcmp (IDENTIFIER_POINTER (name), "__builtin_ObjCString")) | |
d764a8e6 IS |
1636 | { |
1637 | if (flag_next_runtime) | |
1638 | { | |
1639 | if (flag_objc_abi == 2) | |
1640 | return darwin_sections[objc2_constant_string_object_section]; | |
1641 | else | |
1642 | return darwin_sections[objc_constant_string_object_section]; | |
1643 | } | |
1644 | else | |
1645 | return darwin_sections[objc_string_object_section]; | |
1646 | } | |
26705988 IS |
1647 | else if (!strcmp (IDENTIFIER_POINTER (name), "__builtin_CFString")) |
1648 | return darwin_sections[cfstring_constant_object_section]; | |
ae46c4e0 | 1649 | else |
d764a8e6 | 1650 | return base_section; |
ae46c4e0 | 1651 | } |
d764a8e6 | 1652 | /* c) legacy meta-data selection. */ |
59ff4a1c EC |
1653 | else if (TREE_CODE (decl) == VAR_DECL |
1654 | && DECL_NAME (decl) | |
1655 | && TREE_CODE (DECL_NAME (decl)) == IDENTIFIER_NODE | |
1656 | && IDENTIFIER_POINTER (DECL_NAME (decl)) | |
d764a8e6 | 1657 | && flag_next_runtime |
59ff4a1c | 1658 | && !strncmp (IDENTIFIER_POINTER (DECL_NAME (decl)), "_OBJC_", 6)) |
ae46c4e0 | 1659 | { |
59ff4a1c | 1660 | const char *name = IDENTIFIER_POINTER (DECL_NAME (decl)); |
d764a8e6 | 1661 | static bool warned_objc_46 = false; |
46a99b06 IS |
1662 | /* We shall assert that zero-sized objects are an error in ObjC |
1663 | meta-data. */ | |
ae7e9ddd | 1664 | gcc_assert (tree_to_uhwi (DECL_SIZE_UNIT (decl)) != 0); |
d764a8e6 IS |
1665 | |
1666 | /* ??? This mechanism for determining the metadata section is | |
1667 | broken when LTO is in use, since the frontend that generated | |
1668 | the data is not identified. We will keep the capability for | |
1669 | the short term - in case any non-Objective-C programs are using | |
1670 | it to place data in specified sections. */ | |
1671 | if (!warned_objc_46) | |
1672 | { | |
1673 | location_t loc = DECL_SOURCE_LOCATION (decl); | |
1674 | warning_at (loc, 0, "the use of _OBJC_-prefixed variable names" | |
1675 | " to select meta-data sections is deprecated at 4.6" | |
1676 | " and will be removed in 4.7"); | |
1677 | warned_objc_46 = true; | |
1678 | } | |
1679 | ||
ae46c4e0 | 1680 | if (!strncmp (name, "_OBJC_CLASS_METHODS_", 20)) |
59ff4a1c | 1681 | return darwin_sections[objc_cls_meth_section]; |
ae46c4e0 | 1682 | else if (!strncmp (name, "_OBJC_INSTANCE_METHODS_", 23)) |
59ff4a1c | 1683 | return darwin_sections[objc_inst_meth_section]; |
46a99b06 | 1684 | else if (!strncmp (name, "_OBJC_CATEGORY_CLASS_METHODS_", 29)) |
59ff4a1c | 1685 | return darwin_sections[objc_cat_cls_meth_section]; |
46a99b06 | 1686 | else if (!strncmp (name, "_OBJC_CATEGORY_INSTANCE_METHODS_", 32)) |
59ff4a1c | 1687 | return darwin_sections[objc_cat_inst_meth_section]; |
ae46c4e0 | 1688 | else if (!strncmp (name, "_OBJC_CLASS_VARIABLES_", 22)) |
59ff4a1c | 1689 | return darwin_sections[objc_class_vars_section]; |
ae46c4e0 | 1690 | else if (!strncmp (name, "_OBJC_INSTANCE_VARIABLES_", 25)) |
59ff4a1c | 1691 | return darwin_sections[objc_instance_vars_section]; |
ae46c4e0 | 1692 | else if (!strncmp (name, "_OBJC_CLASS_PROTOCOLS_", 22)) |
59ff4a1c | 1693 | return darwin_sections[objc_cat_cls_meth_section]; |
ae46c4e0 | 1694 | else if (!strncmp (name, "_OBJC_CLASS_NAME_", 17)) |
59ff4a1c | 1695 | return darwin_sections[objc_class_names_section]; |
ae46c4e0 | 1696 | else if (!strncmp (name, "_OBJC_METH_VAR_NAME_", 20)) |
59ff4a1c | 1697 | return darwin_sections[objc_meth_var_names_section]; |
ae46c4e0 | 1698 | else if (!strncmp (name, "_OBJC_METH_VAR_TYPE_", 20)) |
59ff4a1c | 1699 | return darwin_sections[objc_meth_var_types_section]; |
ae46c4e0 | 1700 | else if (!strncmp (name, "_OBJC_CLASS_REFERENCES", 22)) |
59ff4a1c | 1701 | return darwin_sections[objc_cls_refs_section]; |
ae46c4e0 | 1702 | else if (!strncmp (name, "_OBJC_CLASS_", 12)) |
59ff4a1c | 1703 | return darwin_sections[objc_class_section]; |
ae46c4e0 | 1704 | else if (!strncmp (name, "_OBJC_METACLASS_", 16)) |
59ff4a1c | 1705 | return darwin_sections[objc_meta_class_section]; |
ae46c4e0 | 1706 | else if (!strncmp (name, "_OBJC_CATEGORY_", 15)) |
59ff4a1c | 1707 | return darwin_sections[objc_category_section]; |
ae46c4e0 | 1708 | else if (!strncmp (name, "_OBJC_SELECTOR_REFERENCES", 25)) |
59ff4a1c | 1709 | return darwin_sections[objc_selector_refs_section]; |
ae46c4e0 | 1710 | else if (!strncmp (name, "_OBJC_SELECTOR_FIXUP", 20)) |
59ff4a1c | 1711 | return darwin_sections[objc_selector_fixup_section]; |
ae46c4e0 | 1712 | else if (!strncmp (name, "_OBJC_SYMBOLS", 13)) |
59ff4a1c | 1713 | return darwin_sections[objc_symbols_section]; |
ae46c4e0 | 1714 | else if (!strncmp (name, "_OBJC_MODULES", 13)) |
59ff4a1c | 1715 | return darwin_sections[objc_module_info_section]; |
264fa2db | 1716 | else if (!strncmp (name, "_OBJC_IMAGE_INFO", 16)) |
59ff4a1c | 1717 | return darwin_sections[objc_image_info_section]; |
ae46c4e0 | 1718 | else if (!strncmp (name, "_OBJC_PROTOCOL_INSTANCE_METHODS_", 32)) |
59ff4a1c | 1719 | return darwin_sections[objc_cat_inst_meth_section]; |
ae46c4e0 | 1720 | else if (!strncmp (name, "_OBJC_PROTOCOL_CLASS_METHODS_", 29)) |
59ff4a1c | 1721 | return darwin_sections[objc_cat_cls_meth_section]; |
ae46c4e0 | 1722 | else if (!strncmp (name, "_OBJC_PROTOCOL_REFS_", 20)) |
59ff4a1c | 1723 | return darwin_sections[objc_cat_cls_meth_section]; |
ae46c4e0 | 1724 | else if (!strncmp (name, "_OBJC_PROTOCOL_", 15)) |
59ff4a1c | 1725 | return darwin_sections[objc_protocol_section]; |
ae46c4e0 | 1726 | else |
59ff4a1c | 1727 | return base_section; |
ae46c4e0 | 1728 | } |
59ff4a1c EC |
1729 | |
1730 | return base_section; | |
ae46c4e0 RH |
1731 | } |
1732 | ||
b64a1b53 | 1733 | /* This can be called with address expressions as "rtx". |
991b6592 | 1734 | They must go in "const". */ |
b64a1b53 | 1735 | |
d6b5193b | 1736 | section * |
ef4bddc2 | 1737 | machopic_select_rtx_section (machine_mode mode, rtx x, |
9c808aad | 1738 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) |
b64a1b53 | 1739 | { |
b79d4265 SS |
1740 | if (GET_MODE_SIZE (mode) == 8 |
1741 | && (GET_CODE (x) == CONST_INT | |
807e902e | 1742 | || GET_CODE (x) == CONST_WIDE_INT |
b79d4265 | 1743 | || GET_CODE (x) == CONST_DOUBLE)) |
56c779bc | 1744 | return darwin_sections[literal8_section]; |
b64a1b53 RH |
1745 | else if (GET_MODE_SIZE (mode) == 4 |
1746 | && (GET_CODE (x) == CONST_INT | |
807e902e | 1747 | || GET_CODE (x) == CONST_WIDE_INT |
b64a1b53 | 1748 | || GET_CODE (x) == CONST_DOUBLE)) |
56c779bc | 1749 | return darwin_sections[literal4_section]; |
5708d18d MS |
1750 | else if (HAVE_GAS_LITERAL16 |
1751 | && TARGET_64BIT | |
1be1e2dd | 1752 | && GET_MODE_SIZE (mode) == 16 |
f7288899 | 1753 | && (GET_CODE (x) == CONST_INT |
807e902e | 1754 | || GET_CODE (x) == CONST_WIDE_INT |
ca6f2eef EC |
1755 | || GET_CODE (x) == CONST_DOUBLE |
1756 | || GET_CODE (x) == CONST_VECTOR)) | |
f7288899 | 1757 | return darwin_sections[literal16_section]; |
86b0a4f3 | 1758 | else if (MACHOPIC_INDIRECT |
2e53734e GK |
1759 | && (GET_CODE (x) == SYMBOL_REF |
1760 | || GET_CODE (x) == CONST | |
1761 | || GET_CODE (x) == LABEL_REF)) | |
56c779bc | 1762 | return darwin_sections[const_data_section]; |
b64a1b53 | 1763 | else |
56c779bc | 1764 | return darwin_sections[const_section]; |
b64a1b53 RH |
1765 | } |
1766 | ||
2cc07db4 | 1767 | void |
9c808aad | 1768 | machopic_asm_out_constructor (rtx symbol, int priority ATTRIBUTE_UNUSED) |
2cc07db4 | 1769 | { |
6a52ccb3 | 1770 | cdtor_record new_elt = {symbol, priority, vec_safe_length (ctors)}; |
ae526fe5 AP |
1771 | |
1772 | vec_safe_push (ctors, new_elt); | |
1773 | ||
1774 | if (! MACHOPIC_INDIRECT) | |
1775 | fprintf (asm_out_file, ".reference .constructors_used\n"); | |
1776 | } | |
1777 | ||
6a52ccb3 AP |
1778 | void |
1779 | machopic_asm_out_destructor (rtx symbol, int priority ATTRIBUTE_UNUSED) | |
1780 | { | |
1781 | cdtor_record new_elt = {symbol, priority, vec_safe_length (dtors)}; | |
1782 | ||
1783 | vec_safe_push (dtors, new_elt); | |
1784 | ||
1785 | if (! MACHOPIC_INDIRECT) | |
1786 | fprintf (asm_out_file, ".reference .destructors_used\n"); | |
1787 | } | |
1788 | ||
ae526fe5 | 1789 | static int |
6a52ccb3 | 1790 | sort_cdtor_records (const void * a, const void * b) |
ae526fe5 | 1791 | { |
6a52ccb3 AP |
1792 | const cdtor_record *cda = (const cdtor_record *)a; |
1793 | const cdtor_record *cdb = (const cdtor_record *)b; | |
1794 | if (cda->priority > cdb->priority) | |
ae526fe5 | 1795 | return 1; |
6a52ccb3 | 1796 | if (cda->priority < cdb->priority) |
ae526fe5 | 1797 | return -1; |
6a52ccb3 | 1798 | if (cda->position > cdb->position) |
ae526fe5 | 1799 | return 1; |
6a52ccb3 | 1800 | if (cda->position < cdb->position) |
ae526fe5 AP |
1801 | return -1; |
1802 | return 0; | |
1803 | } | |
1804 | ||
1805 | static void | |
6a52ccb3 | 1806 | finalize_ctors () |
ae526fe5 AP |
1807 | { |
1808 | unsigned int i; | |
6a52ccb3 | 1809 | cdtor_record *elt; |
ae526fe5 | 1810 | |
ab82a49f | 1811 | if (MACHOPIC_INDIRECT) |
56c779bc | 1812 | switch_to_section (darwin_sections[mod_init_section]); |
2cc07db4 | 1813 | else |
56c779bc | 1814 | switch_to_section (darwin_sections[constructor_section]); |
2cc07db4 | 1815 | |
ae526fe5 | 1816 | if (vec_safe_length (ctors) > 1) |
6a52ccb3 | 1817 | ctors->qsort (sort_cdtor_records); |
ae526fe5 AP |
1818 | FOR_EACH_VEC_SAFE_ELT (ctors, i, elt) |
1819 | { | |
1820 | assemble_align (POINTER_SIZE); | |
1821 | assemble_integer (elt->symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
1822 | } | |
2cc07db4 RH |
1823 | } |
1824 | ||
6a52ccb3 AP |
1825 | static void |
1826 | finalize_dtors () | |
2cc07db4 | 1827 | { |
6a52ccb3 AP |
1828 | unsigned int i; |
1829 | cdtor_record *elt; | |
1830 | ||
ab82a49f | 1831 | if (MACHOPIC_INDIRECT) |
56c779bc | 1832 | switch_to_section (darwin_sections[mod_term_section]); |
2cc07db4 | 1833 | else |
56c779bc | 1834 | switch_to_section (darwin_sections[destructor_section]); |
2cc07db4 | 1835 | |
6a52ccb3 AP |
1836 | if (vec_safe_length (dtors) > 1) |
1837 | dtors->qsort (sort_cdtor_records); | |
1838 | FOR_EACH_VEC_SAFE_ELT (dtors, i, elt) | |
1839 | { | |
1840 | assemble_align (POINTER_SIZE); | |
1841 | assemble_integer (elt->symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
1842 | } | |
2cc07db4 | 1843 | } |
e2500fed | 1844 | |
5eb99654 | 1845 | void |
9c808aad | 1846 | darwin_globalize_label (FILE *stream, const char *name) |
5eb99654 KG |
1847 | { |
1848 | if (!!strncmp (name, "_OBJC_", 6)) | |
1849 | default_globalize_label (stream, name); | |
1850 | } | |
1851 | ||
d8299715 DK |
1852 | /* This routine returns non-zero if 'name' starts with the special objective-c |
1853 | anonymous file-scope static name. It accommodates c++'s mangling of such | |
1854 | symbols (in this case the symbols will have form _ZL{d}*_OBJC_* d=digit). */ | |
1855 | ||
1856 | int | |
1857 | darwin_label_is_anonymous_local_objc_name (const char *name) | |
1858 | { | |
1859 | const unsigned char *p = (const unsigned char *) name; | |
1860 | if (*p != '_') | |
1861 | return 0; | |
1862 | if (p[1] == 'Z' && p[2] == 'L') | |
1863 | { | |
1864 | p += 3; | |
1865 | while (*p >= '0' && *p <= '9') | |
1866 | p++; | |
1867 | } | |
1868 | return (!strncmp ((const char *)p, "_OBJC_", 6)); | |
1869 | } | |
1870 | ||
b20577ea | 1871 | /* LTO support for Mach-O. |
c082f9f3 | 1872 | |
b20577ea IS |
1873 | This version uses three mach-o sections to encapsulate the (unlimited |
1874 | number of) lto sections. | |
c082f9f3 | 1875 | |
b20577ea IS |
1876 | __GNU_LTO, __lto_sections contains the concatented GNU LTO section data. |
1877 | __GNU_LTO, __section_names contains the GNU LTO section names. | |
1878 | __GNU_LTO, __section_index contains an array of values that index these. | |
c082f9f3 | 1879 | |
b20577ea IS |
1880 | Indexed thus: |
1881 | <section offset from the start of __GNU_LTO, __lto_sections>, | |
1882 | <section length> | |
1883 | <name offset from the start of __GNU_LTO, __section_names, | |
1884 | <name length>. | |
1885 | ||
1886 | At present, for both m32 and m64 mach-o files each of these fields is | |
1887 | represented by a uint32_t. This is because, AFAICT, a mach-o object | |
1888 | cannot exceed 4Gb because the section_64 offset field (see below) is 32bits. | |
1889 | ||
1890 | uint32_t offset; | |
1891 | "offset An integer specifying the offset to this section in the file." */ | |
1892 | ||
1893 | /* Count lto section numbers. */ | |
1894 | static unsigned int lto_section_num = 0; | |
1895 | ||
1896 | /* A vector of information about LTO sections, at present, we only have | |
1897 | the name. TODO: see if we can get the data length somehow. */ | |
1898 | typedef struct GTY (()) darwin_lto_section_e { | |
1899 | const char *sectname; | |
1900 | } darwin_lto_section_e ; | |
b20577ea | 1901 | |
9771b263 | 1902 | static GTY (()) vec<darwin_lto_section_e, va_gc> *lto_section_names; |
b20577ea | 1903 | |
b20577ea IS |
1904 | /* Section wrapper scheme (used here to wrap the unlimited number of LTO |
1905 | sections into three Mach-O ones). | |
1906 | NOTE: These names MUST be kept in sync with those in | |
1907 | libiberty/simple-object-mach-o. */ | |
1908 | #define LTO_SECTS_SECTION "__wrapper_sects" | |
1909 | #define LTO_NAMES_SECTION "__wrapper_names" | |
1910 | #define LTO_INDEX_SECTION "__wrapper_index" | |
c082f9f3 SB |
1911 | |
1912 | /* File to temporarily store LTO data. This is appended to asm_out_file | |
1913 | in darwin_end_file. */ | |
1914 | static FILE *lto_asm_out_file, *saved_asm_out_file; | |
1915 | static char *lto_asm_out_name; | |
1916 | ||
1917 | /* Prepare asm_out_file for LTO output. For darwin, this means hiding | |
1918 | asm_out_file and switching to an alternative output file. */ | |
1919 | void | |
1920 | darwin_asm_lto_start (void) | |
1921 | { | |
1922 | gcc_assert (! saved_asm_out_file); | |
1923 | saved_asm_out_file = asm_out_file; | |
1924 | if (! lto_asm_out_name) | |
1925 | lto_asm_out_name = make_temp_file (".lto.s"); | |
1926 | lto_asm_out_file = fopen (lto_asm_out_name, "a"); | |
1927 | if (lto_asm_out_file == NULL) | |
40fecdd6 JM |
1928 | fatal_error (input_location, |
1929 | "failed to open temporary file %s for LTO output", | |
c082f9f3 SB |
1930 | lto_asm_out_name); |
1931 | asm_out_file = lto_asm_out_file; | |
1932 | } | |
1933 | ||
1934 | /* Restore asm_out_file. */ | |
1935 | void | |
1936 | darwin_asm_lto_end (void) | |
1937 | { | |
1938 | gcc_assert (saved_asm_out_file); | |
1939 | fclose (lto_asm_out_file); | |
1940 | asm_out_file = saved_asm_out_file; | |
1941 | saved_asm_out_file = NULL; | |
1942 | } | |
1943 | ||
de4df14c IS |
1944 | static void |
1945 | darwin_asm_dwarf_section (const char *name, unsigned int flags, tree decl); | |
1946 | ||
1947 | /* Called for the TARGET_ASM_NAMED_SECTION hook. */ | |
1948 | ||
4746cf84 | 1949 | void |
083cad55 | 1950 | darwin_asm_named_section (const char *name, |
c082f9f3 | 1951 | unsigned int flags, |
c18a5b6c | 1952 | tree decl ATTRIBUTE_UNUSED) |
4746cf84 | 1953 | { |
b20577ea IS |
1954 | /* LTO sections go in a special section that encapsulates the (unlimited) |
1955 | number of GNU LTO sections within a single mach-o one. */ | |
c082f9f3 SB |
1956 | if (strncmp (name, LTO_SECTION_NAME_PREFIX, |
1957 | strlen (LTO_SECTION_NAME_PREFIX)) == 0) | |
1958 | { | |
b20577ea | 1959 | darwin_lto_section_e e; |
c082f9f3 SB |
1960 | /* We expect certain flags to be set... */ |
1961 | gcc_assert ((flags & (SECTION_DEBUG | SECTION_NAMED)) | |
1962 | == (SECTION_DEBUG | SECTION_NAMED)); | |
1963 | ||
b20577ea IS |
1964 | /* Switch to our combined section. */ |
1965 | fprintf (asm_out_file, "\t.section %s,%s,regular,debug\n", | |
1966 | LTO_SEGMENT_NAME, LTO_SECTS_SECTION); | |
1967 | /* Output a label for the start of this sub-section. */ | |
1968 | fprintf (asm_out_file, "L_GNU_LTO%d:\t;# %s\n", | |
1969 | lto_section_num, name); | |
1970 | /* We have to jump through hoops to get the values of the intra-section | |
1971 | offsets... */ | |
1972 | fprintf (asm_out_file, "\t.set L$gnu$lto$offs%d,L_GNU_LTO%d-L_GNU_LTO0\n", | |
1973 | lto_section_num, lto_section_num); | |
1974 | fprintf (asm_out_file, | |
1975 | "\t.set L$gnu$lto$size%d,L_GNU_LTO%d-L_GNU_LTO%d\n", | |
1976 | lto_section_num, lto_section_num+1, lto_section_num); | |
1977 | lto_section_num++; | |
1978 | e.sectname = xstrdup (name); | |
1979 | /* Keep the names, we'll need to make a table later. | |
1980 | TODO: check that we do not revisit sections, that would break | |
1981 | the assumption of how this is done. */ | |
1982 | if (lto_section_names == NULL) | |
9771b263 DN |
1983 | vec_alloc (lto_section_names, 16); |
1984 | vec_safe_push (lto_section_names, e); | |
b20577ea | 1985 | } |
de4df14c IS |
1986 | else if (strncmp (name, "__DWARF,", 8) == 0) |
1987 | darwin_asm_dwarf_section (name, flags, decl); | |
c082f9f3 SB |
1988 | else |
1989 | fprintf (asm_out_file, "\t.section %s\n", name); | |
4746cf84 MA |
1990 | } |
1991 | ||
083cad55 | 1992 | void |
f1a66265 | 1993 | darwin_unique_section (tree decl ATTRIBUTE_UNUSED, int reloc ATTRIBUTE_UNUSED) |
4746cf84 | 1994 | { |
f1a66265 | 1995 | /* Darwin does not use unique sections. */ |
4746cf84 MA |
1996 | } |
1997 | ||
f475fd3c MS |
1998 | /* Handle __attribute__ ((apple_kext_compatibility)). |
1999 | This only applies to darwin kexts for 2.95 compatibility -- it shrinks the | |
2000 | vtable for classes with this attribute (and their descendants) by not | |
2001 | outputting the new 3.0 nondeleting destructor. This means that such | |
2002 | objects CANNOT be allocated on the stack or as globals UNLESS they have | |
2003 | a completely empty `operator delete'. | |
2004 | Luckily, this fits in with the Darwin kext model. | |
2005 | ||
2006 | This attribute also disables gcc3's potential overlaying of derived | |
2007 | class data members on the padding at the end of the base class. */ | |
2008 | ||
2009 | tree | |
2010 | darwin_handle_kext_attribute (tree *node, tree name, | |
2011 | tree args ATTRIBUTE_UNUSED, | |
2012 | int flags ATTRIBUTE_UNUSED, | |
2013 | bool *no_add_attrs) | |
2014 | { | |
2015 | /* APPLE KEXT stuff -- only applies with pure static C++ code. */ | |
2016 | if (! TARGET_KEXTABI) | |
2017 | { | |
29d08eba JM |
2018 | warning (0, "%qE 2.95 vtable-compatibility attribute applies " |
2019 | "only when compiling a kext", name); | |
f475fd3c MS |
2020 | |
2021 | *no_add_attrs = true; | |
2022 | } | |
2023 | else if (TREE_CODE (*node) != RECORD_TYPE) | |
2024 | { | |
29d08eba JM |
2025 | warning (0, "%qE 2.95 vtable-compatibility attribute applies " |
2026 | "only to C++ classes", name); | |
f475fd3c MS |
2027 | |
2028 | *no_add_attrs = true; | |
2029 | } | |
2030 | ||
2031 | return NULL_TREE; | |
2032 | } | |
2033 | ||
005c1a13 GK |
2034 | /* Handle a "weak_import" attribute; arguments as in |
2035 | struct attribute_spec.handler. */ | |
2036 | ||
2037 | tree | |
2038 | darwin_handle_weak_import_attribute (tree *node, tree name, | |
2039 | tree ARG_UNUSED (args), | |
2040 | int ARG_UNUSED (flags), | |
2041 | bool * no_add_attrs) | |
2042 | { | |
d7001ae5 | 2043 | if (TREE_CODE (*node) != FUNCTION_DECL && TREE_CODE (*node) != VAR_DECL) |
005c1a13 | 2044 | { |
29d08eba JM |
2045 | warning (OPT_Wattributes, "%qE attribute ignored", |
2046 | name); | |
005c1a13 GK |
2047 | *no_add_attrs = true; |
2048 | } | |
2049 | else | |
2050 | declare_weak (*node); | |
2051 | ||
2052 | return NULL_TREE; | |
2053 | } | |
45cc4783 | 2054 | |
083cad55 | 2055 | /* Emit a label for an FDE, making it global and/or weak if appropriate. |
eeab4d81 MS |
2056 | The third parameter is nonzero if this is for exception handling. |
2057 | The fourth parameter is nonzero if this is just a placeholder for an | |
4746cf84 | 2058 | FDE that we are omitting. */ |
eeab4d81 | 2059 | |
083cad55 | 2060 | void |
eeab4d81 | 2061 | darwin_emit_unwind_label (FILE *file, tree decl, int for_eh, int empty) |
4746cf84 | 2062 | { |
1f81953b IS |
2063 | char *lab ; |
2064 | char buf[32]; | |
2065 | static int invok_count = 0; | |
2066 | static tree last_fun_decl = NULL_TREE; | |
2067 | ||
2068 | /* We use the linker to emit the .eh labels for Darwin 9 and above. */ | |
2069 | if (! for_eh || generating_for_darwin_version >= 9) | |
192d0f89 | 2070 | return; |
4746cf84 | 2071 | |
1f81953b IS |
2072 | /* FIXME: This only works when the eh for all sections of a function is |
2073 | emitted at the same time. If that changes, we would need to use a lookup | |
2074 | table of some form to determine what to do. Also, we should emit the | |
2075 | unadorned label for the partition containing the public label for a | |
2076 | function. This is of limited use, probably, since we do not currently | |
2077 | enable partitioning. */ | |
2078 | strcpy (buf, ".eh"); | |
2079 | if (decl && TREE_CODE (decl) == FUNCTION_DECL) | |
2080 | { | |
2081 | if (decl == last_fun_decl) | |
2082 | { | |
2083 | invok_count++; | |
2084 | snprintf (buf, 31, "$$part$$%d.eh", invok_count); | |
2085 | } | |
2086 | else | |
2087 | { | |
2088 | last_fun_decl = decl; | |
2089 | invok_count = 0; | |
2090 | } | |
2091 | } | |
2092 | ||
2093 | lab = concat (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)), buf, NULL); | |
4746cf84 MA |
2094 | |
2095 | if (TREE_PUBLIC (decl)) | |
c3b07ec2 GK |
2096 | { |
2097 | targetm.asm_out.globalize_label (file, lab); | |
2098 | if (DECL_VISIBILITY (decl) == VISIBILITY_HIDDEN) | |
2099 | { | |
2100 | fputs ("\t.private_extern ", file); | |
2101 | assemble_name (file, lab); | |
2102 | fputc ('\n', file); | |
2103 | } | |
2104 | } | |
4746cf84 | 2105 | |
f1a66265 | 2106 | if (DECL_WEAK (decl)) |
c3b07ec2 GK |
2107 | { |
2108 | fputs ("\t.weak_definition ", file); | |
2109 | assemble_name (file, lab); | |
2110 | fputc ('\n', file); | |
2111 | } | |
4746cf84 | 2112 | |
c3b07ec2 | 2113 | assemble_name (file, lab); |
4746cf84 | 2114 | if (empty) |
45cc4783 | 2115 | { |
c3b07ec2 | 2116 | fputs (" = 0\n", file); |
45cc4783 MS |
2117 | |
2118 | /* Mark the absolute .eh and .eh1 style labels as needed to | |
2119 | ensure that we don't dead code strip them and keep such | |
2120 | labels from another instantiation point until we can fix this | |
2121 | properly with group comdat support. */ | |
c3b07ec2 | 2122 | darwin_mark_decl_preserved (lab); |
45cc4783 | 2123 | } |
4746cf84 | 2124 | else |
c3b07ec2 | 2125 | fputs (":\n", file); |
4746cf84 MA |
2126 | |
2127 | free (lab); | |
2128 | } | |
2129 | ||
083cad55 EC |
2130 | static GTY(()) unsigned long except_table_label_num; |
2131 | ||
2132 | void | |
2133 | darwin_emit_except_table_label (FILE *file) | |
2134 | { | |
2135 | char section_start_label[30]; | |
2136 | ||
2137 | ASM_GENERATE_INTERNAL_LABEL (section_start_label, "GCC_except_table", | |
2138 | except_table_label_num++); | |
2139 | ASM_OUTPUT_LABEL (file, section_start_label); | |
2140 | } | |
2141 | /* Generate a PC-relative reference to a Mach-O non-lazy-symbol. */ | |
eeab4d81 | 2142 | |
4746cf84 MA |
2143 | void |
2144 | darwin_non_lazy_pcrel (FILE *file, rtx addr) | |
2145 | { | |
4746cf84 MA |
2146 | const char *nlp_name; |
2147 | ||
992d08b1 | 2148 | gcc_assert (GET_CODE (addr) == SYMBOL_REF); |
4746cf84 | 2149 | |
11abc112 | 2150 | nlp_name = machopic_indirection_name (addr, /*stub_p=*/false); |
4746cf84 MA |
2151 | fputs ("\t.long\t", file); |
2152 | ASM_OUTPUT_LABELREF (file, nlp_name); | |
2153 | fputs ("-.", file); | |
2154 | } | |
2155 | ||
46a99b06 IS |
2156 | /* If this is uncommented, details of each allocation will be printed |
2157 | in the asm right before the actual code. WARNING - this will cause some | |
2158 | test-suite fails (since the printout will contain items that some tests | |
2159 | are not expecting) -- so don't leave it on by default (it bloats the | |
2160 | asm too). */ | |
2161 | /*#define DEBUG_DARWIN_MEM_ALLOCATORS*/ | |
2162 | ||
2163 | /* The first two of these routines are ostensibly just intended to put | |
2164 | names into the asm. However, they are both hijacked in order to ensure | |
2165 | that zero-sized items do not make their way into the output. Consequently, | |
2166 | we also need to make these participate in provisions for dealing with | |
2167 | such items in section anchors. */ | |
2168 | ||
2169 | /* The implementation of ASM_DECLARE_OBJECT_NAME. */ | |
2170 | /* The RTTI data (e.g., __ti4name) is common and public (and static), | |
2171 | but it does need to be referenced via indirect PIC data pointers. | |
2172 | The machopic_define_symbol calls are telling the machopic subsystem | |
2173 | that the name *is* defined in this module, so it doesn't need to | |
2174 | make them indirect. */ | |
2175 | void | |
2176 | darwin_asm_declare_object_name (FILE *file, | |
2177 | const char *nam, tree decl) | |
2178 | { | |
2179 | const char *xname = nam; | |
2180 | unsigned HOST_WIDE_INT size; | |
2181 | bool local_def, weak; | |
2182 | ||
2183 | weak = (DECL_P (decl) | |
2184 | && DECL_WEAK (decl) | |
2185 | && !lookup_attribute ("weak_import", | |
2186 | DECL_ATTRIBUTES (decl))); | |
2187 | ||
2188 | local_def = DECL_INITIAL (decl) || (TREE_STATIC (decl) | |
2189 | && (!DECL_COMMON (decl) | |
2190 | || !TREE_PUBLIC (decl))); | |
2191 | ||
2192 | if (GET_CODE (XEXP (DECL_RTL (decl), 0)) != SYMBOL_REF) | |
2193 | xname = IDENTIFIER_POINTER (DECL_NAME (decl)); | |
2194 | ||
2195 | if (local_def) | |
2196 | { | |
2197 | (* targetm.encode_section_info) (decl, DECL_RTL (decl), false); | |
2198 | if (!weak) | |
2199 | machopic_define_symbol (DECL_RTL (decl)); | |
2200 | } | |
2201 | ||
ae7e9ddd | 2202 | size = tree_to_uhwi (DECL_SIZE_UNIT (decl)); |
46a99b06 IS |
2203 | |
2204 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2205 | fprintf (file, "# dadon: %s %s (%llu, %u) local %d weak %d" | |
2206 | " stat %d com %d pub %d t-const %d t-ro %d init %lx\n", | |
2207 | xname, (TREE_CODE (decl) == VAR_DECL?"var":"const"), | |
2208 | (unsigned long long)size, DECL_ALIGN (decl), local_def, | |
2209 | DECL_WEAK (decl), TREE_STATIC (decl), DECL_COMMON (decl), | |
2210 | TREE_PUBLIC (decl), TREE_CONSTANT (decl), TREE_READONLY (decl), | |
2211 | (unsigned long)DECL_INITIAL (decl)); | |
2212 | #endif | |
2213 | ||
2214 | /* Darwin needs help to support local zero-sized objects. | |
2215 | They must be made at least one byte, and the section containing must be | |
2216 | marked as unsuitable for section-anchors (see storage allocators below). | |
2217 | ||
2218 | For non-zero objects this output is handled by varasm.c. | |
2219 | */ | |
2220 | if (!size) | |
2221 | { | |
2222 | unsigned int l2align = 0; | |
2223 | ||
7607219d | 2224 | /* The align must be honored, even for zero-sized. */ |
46a99b06 IS |
2225 | if (DECL_ALIGN (decl)) |
2226 | { | |
2227 | l2align = floor_log2 (DECL_ALIGN (decl) / BITS_PER_UNIT); | |
2228 | fprintf (file, "\t.align\t%u\n", l2align); | |
2229 | } | |
2230 | ||
2231 | ASM_OUTPUT_LABEL (file, xname); | |
2232 | size = 1; | |
16998094 | 2233 | fprintf (file, "\t.space\t" HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); |
46a99b06 IS |
2234 | |
2235 | /* Check that we've correctly picked up the zero-sized item and placed it | |
2236 | properly. */ | |
2237 | gcc_assert ((!DARWIN_SECTION_ANCHORS || !flag_section_anchors) | |
2238 | || (in_section | |
2239 | && (in_section->common.flags & SECTION_NO_ANCHOR))); | |
2240 | } | |
2241 | else | |
2242 | ASM_OUTPUT_LABEL (file, xname); | |
2243 | } | |
e4f7c483 | 2244 | |
46a99b06 | 2245 | /* The implementation of ASM_DECLARE_CONSTANT_NAME. */ |
e4f7c483 AS |
2246 | void |
2247 | darwin_asm_declare_constant_name (FILE *file, const char *name, | |
2248 | const_tree exp ATTRIBUTE_UNUSED, | |
2249 | HOST_WIDE_INT size) | |
2250 | { | |
2251 | assemble_label (file, name); | |
46a99b06 IS |
2252 | /* As for other items, we need at least one byte. */ |
2253 | if (!size) | |
2254 | { | |
2255 | fputs ("\t.space\t1\n", file); | |
2256 | /* Check that we've correctly picked up the zero-sized item and placed it | |
2257 | properly. */ | |
2258 | gcc_assert ((!DARWIN_SECTION_ANCHORS || !flag_section_anchors) | |
2259 | || (in_section | |
2260 | && (in_section->common.flags & SECTION_NO_ANCHOR))); | |
2261 | } | |
2262 | } | |
2263 | ||
2264 | /* Darwin storage allocators. | |
2265 | ||
2266 | Zerofill sections are desirable for large blank data since, otherwise, these | |
2267 | data bloat objects (PR33210). | |
2268 | ||
2269 | However, section anchors don't work in .zerofill sections (one cannot switch | |
2270 | to a zerofill section). Ergo, for Darwin targets using section anchors we need | |
2271 | to put (at least some) data into 'normal' switchable sections. | |
2272 | ||
2273 | Here we set a relatively arbitrary value for the size of an object to trigger | |
2274 | zerofill when section anchors are enabled (anything bigger than a page for | |
2275 | current Darwin implementations). FIXME: there ought to be some objective way | |
2276 | to make this choice. | |
2277 | ||
2278 | When section anchor are off this is ignored anyway. */ | |
2279 | ||
2280 | #define BYTES_ZFILL 4096 | |
2281 | ||
2282 | /* Emit a chunk of data for items coalesced by the linker. */ | |
2283 | static void | |
2284 | darwin_emit_weak_or_comdat (FILE *fp, tree decl, const char *name, | |
2285 | unsigned HOST_WIDE_INT size, | |
2286 | unsigned int align) | |
2287 | { | |
2288 | /* Since the sections used here are coalesed, they will not be eligible | |
2289 | for section anchors, and therefore we don't need to break that out. */ | |
2290 | if (TREE_READONLY (decl) || TREE_CONSTANT (decl)) | |
2291 | switch_to_section (darwin_sections[const_data_coal_section]); | |
2292 | else | |
2293 | switch_to_section (darwin_sections[data_coal_section]); | |
2294 | ||
2295 | /* To be consistent, we'll allow darwin_asm_declare_object_name to assemble | |
2296 | the align info for zero-sized items... but do it here otherwise. */ | |
2297 | if (size && align) | |
2298 | fprintf (fp, "\t.align\t%d\n", floor_log2 (align / BITS_PER_UNIT)); | |
2299 | ||
2300 | if (TREE_PUBLIC (decl)) | |
2301 | darwin_globalize_label (fp, name); | |
2302 | ||
2303 | /* ... and we let it deal with outputting one byte of zero for them too. */ | |
2304 | darwin_asm_declare_object_name (fp, name, decl); | |
2305 | if (size) | |
2306 | assemble_zeros (size); | |
2307 | } | |
2308 | ||
d764a8e6 IS |
2309 | /* Emit a chunk of data for ObjC meta-data that got placed in BSS erroneously. */ |
2310 | static void | |
2311 | darwin_emit_objc_zeroed (FILE *fp, tree decl, const char *name, | |
2312 | unsigned HOST_WIDE_INT size, | |
2313 | unsigned int align, tree meta) | |
2314 | { | |
2315 | section *ocs = data_section; | |
2316 | ||
2317 | if (TREE_PURPOSE (meta) == get_identifier("OBJC2META")) | |
2318 | ocs = darwin_objc2_section (decl, meta, ocs); | |
2319 | else | |
2320 | ocs = darwin_objc1_section (decl, meta, ocs); | |
2321 | ||
2322 | switch_to_section (ocs); | |
2323 | ||
2324 | /* We shall declare that zero-sized meta-data are not valid (yet). */ | |
2325 | gcc_assert (size); | |
2326 | fprintf (fp, "\t.align\t%d\n", floor_log2 (align / BITS_PER_UNIT)); | |
2327 | ||
2328 | /* ... and we let it deal with outputting one byte of zero for them too. */ | |
2329 | darwin_asm_declare_object_name (fp, name, decl); | |
2330 | assemble_zeros (size); | |
2331 | } | |
2332 | ||
46a99b06 IS |
2333 | /* This routine emits 'local' storage: |
2334 | ||
2335 | When Section Anchors are off this routine emits .zerofill commands in | |
2336 | sections named for their alignment. | |
2337 | ||
2338 | When Section Anchors are on, smaller (non-zero-sized) items are placed in | |
2339 | the .static_data section so that the section anchoring system can see them. | |
2340 | Larger items are still placed in .zerofill sections, addressing PR33210. | |
2341 | The routine has no checking - it is all assumed to be done by the caller. | |
2342 | */ | |
2343 | static void | |
2344 | darwin_emit_local_bss (FILE *fp, tree decl, const char *name, | |
2345 | unsigned HOST_WIDE_INT size, | |
2346 | unsigned int l2align) | |
2347 | { | |
2348 | /* FIXME: We have a fudge to make this work with Java even when the target does | |
2349 | not use sections anchors -- Java seems to need at least one small item in a | |
2350 | non-zerofill segment. */ | |
2351 | if ((DARWIN_SECTION_ANCHORS && flag_section_anchors && size < BYTES_ZFILL) | |
2352 | || (size && size <= 2)) | |
2353 | { | |
2354 | /* Put smaller objects in _static_data, where the section anchors system | |
2355 | can get them. | |
2356 | However, if they are zero-sized punt them to yet a different section | |
2357 | (that is not allowed to participate in anchoring). */ | |
2358 | if (!size) | |
2359 | { | |
2360 | fputs ("\t.section\t__DATA,__zobj_bss\n", fp); | |
2361 | in_section = darwin_sections[zobj_bss_section]; | |
2362 | size = 1; | |
2363 | } | |
2364 | else | |
2365 | { | |
2366 | fputs ("\t.static_data\n", fp); | |
2367 | in_section = darwin_sections[static_data_section]; | |
2368 | } | |
2369 | ||
2370 | if (l2align) | |
2371 | fprintf (fp, "\t.align\t%u\n", l2align); | |
2372 | ||
2373 | assemble_name (fp, name); | |
16998094 | 2374 | fprintf (fp, ":\n\t.space\t" HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); |
46a99b06 IS |
2375 | } |
2376 | else | |
2377 | { | |
2378 | /* When we are on a non-section anchor target, we can get zero-sized | |
2379 | items here. However, all we need to do is to bump them to one byte | |
2380 | and the section alignment will take care of the rest. */ | |
2381 | char secnam[64]; | |
2382 | unsigned int flags ; | |
2383 | snprintf (secnam, 64, "__DATA,__%sbss%u", ((size)?"":"zo_"), | |
2384 | (unsigned) l2align); | |
2385 | /* We can't anchor (yet, if ever) in zerofill sections, because we can't | |
2386 | switch to them and emit a label. */ | |
2387 | flags = SECTION_BSS|SECTION_WRITE|SECTION_NO_ANCHOR; | |
2388 | in_section = get_section (secnam, flags, NULL); | |
2389 | fprintf (fp, "\t.zerofill %s,", secnam); | |
2390 | assemble_name (fp, name); | |
2391 | if (!size) | |
2392 | size = 1; | |
2393 | ||
2394 | if (l2align) | |
16998094 | 2395 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", |
46a99b06 IS |
2396 | size, (unsigned) l2align); |
2397 | else | |
16998094 | 2398 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); |
46a99b06 IS |
2399 | } |
2400 | ||
2401 | (*targetm.encode_section_info) (decl, DECL_RTL (decl), false); | |
2402 | /* This is defined as a file-scope var, so we know to notify machopic. */ | |
2403 | machopic_define_symbol (DECL_RTL (decl)); | |
2404 | } | |
2405 | ||
2406 | /* Emit a chunk of common. */ | |
2407 | static void | |
2408 | darwin_emit_common (FILE *fp, const char *name, | |
2409 | unsigned HOST_WIDE_INT size, unsigned int align) | |
2410 | { | |
2411 | unsigned HOST_WIDE_INT rounded; | |
2412 | unsigned int l2align; | |
e4f7c483 | 2413 | |
46a99b06 IS |
2414 | /* Earlier systems complain if the alignment exceeds the page size. |
2415 | The magic number is 4096 * 8 - hard-coded for legacy systems. */ | |
2416 | if (!emit_aligned_common && (align > 32768UL)) | |
2417 | align = 4096UL; /* In units. */ | |
2418 | else | |
2419 | align /= BITS_PER_UNIT; | |
2420 | ||
2421 | /* Make sure we have a meaningful align. */ | |
2422 | if (!align) | |
2423 | align = 1; | |
2424 | ||
2425 | /* For earlier toolchains, we need to emit the var as a rounded size to | |
2426 | tell ld the alignment. */ | |
2427 | if (size < align) | |
2428 | rounded = align; | |
2429 | else | |
2430 | rounded = (size + (align-1)) & ~(align-1); | |
2431 | ||
2432 | l2align = floor_log2 (align); | |
2433 | gcc_assert (l2align <= L2_MAX_OFILE_ALIGNMENT); | |
2434 | ||
2435 | in_section = comm_section; | |
2436 | /* We mustn't allow multiple public symbols to share an address when using | |
2437 | the normal OSX toolchain. */ | |
2438 | if (!size) | |
2439 | { | |
2440 | /* Put at least one byte. */ | |
2441 | size = 1; | |
2442 | /* This section can no longer participate in section anchoring. */ | |
2443 | comm_section->common.flags |= SECTION_NO_ANCHOR; | |
2444 | } | |
2445 | ||
2446 | fputs ("\t.comm\t", fp); | |
2447 | assemble_name (fp, name); | |
2448 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED, | |
2449 | emit_aligned_common?size:rounded); | |
2450 | if (l2align && emit_aligned_common) | |
2451 | fprintf (fp, ",%u", l2align); | |
2452 | fputs ("\n", fp); | |
2453 | } | |
2454 | ||
2455 | /* Output a var which is all zero - into aligned BSS sections, common, lcomm | |
2456 | or coalescable data sections (for weak or comdat) as appropriate. */ | |
2457 | ||
2458 | void | |
2459 | darwin_output_aligned_bss (FILE *fp, tree decl, const char *name, | |
2460 | unsigned HOST_WIDE_INT size, unsigned int align) | |
2461 | { | |
2462 | unsigned int l2align; | |
2463 | bool one, pub, weak; | |
d764a8e6 | 2464 | tree meta; |
46a99b06 IS |
2465 | |
2466 | pub = TREE_PUBLIC (decl); | |
2467 | one = DECL_ONE_ONLY (decl); | |
2468 | weak = (DECL_P (decl) | |
2469 | && DECL_WEAK (decl) | |
2470 | && !lookup_attribute ("weak_import", | |
2471 | DECL_ATTRIBUTES (decl))); | |
2472 | ||
2473 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2474 | fprintf (fp, "# albss: %s (%lld,%d) ro %d cst %d stat %d com %d" | |
2475 | " pub %d weak %d one %d init %lx\n", | |
2476 | name, (long long)size, (int)align, TREE_READONLY (decl), | |
2477 | TREE_CONSTANT (decl), TREE_STATIC (decl), DECL_COMMON (decl), | |
2478 | pub, weak, one, (unsigned long)DECL_INITIAL (decl)); | |
2479 | #endif | |
2480 | ||
d764a8e6 IS |
2481 | /* ObjC metadata can get put in BSS because varasm.c decides it's BSS |
2482 | before the target has a chance to comment. */ | |
2483 | if ((meta = is_objc_metadata (decl))) | |
2484 | { | |
2485 | darwin_emit_objc_zeroed (fp, decl, name, size, DECL_ALIGN (decl), meta); | |
2486 | return; | |
2487 | } | |
2488 | ||
46a99b06 IS |
2489 | /* Check that any initializer is valid. */ |
2490 | gcc_assert ((DECL_INITIAL (decl) == NULL) | |
2491 | || (DECL_INITIAL (decl) == error_mark_node) | |
2492 | || initializer_zerop (DECL_INITIAL (decl))); | |
2493 | ||
2494 | gcc_assert (DECL_SECTION_NAME (decl) == NULL); | |
2495 | gcc_assert (!DECL_COMMON (decl)); | |
2496 | ||
2497 | /* Pick up the correct alignment. */ | |
2498 | if (!size || !align) | |
2499 | align = DECL_ALIGN (decl); | |
2500 | ||
2501 | l2align = floor_log2 (align / BITS_PER_UNIT); | |
2502 | gcc_assert (l2align <= L2_MAX_OFILE_ALIGNMENT); | |
2503 | ||
2504 | last_assemble_variable_decl = decl; | |
2505 | ||
2506 | /* We would rather not have to check this here - but it seems that we might | |
2507 | be passed a decl that should be in coalesced space. */ | |
2508 | if (one || weak) | |
2509 | { | |
7607219d | 2510 | /* Weak or COMDAT objects are put in mergeable sections. */ |
46a99b06 IS |
2511 | darwin_emit_weak_or_comdat (fp, decl, name, size, |
2512 | DECL_ALIGN (decl)); | |
2513 | return; | |
2514 | } | |
2515 | ||
2516 | /* If this is not public, then emit according to local rules. */ | |
2517 | if (!pub) | |
2518 | { | |
2519 | darwin_emit_local_bss (fp, decl, name, size, l2align); | |
2520 | return; | |
2521 | } | |
2522 | ||
2523 | /* So we have a public symbol (small item fudge for Java, see above). */ | |
2524 | if ((DARWIN_SECTION_ANCHORS && flag_section_anchors && size < BYTES_ZFILL) | |
2525 | || (size && size <= 2)) | |
2526 | { | |
2527 | /* Put smaller objects in data, where the section anchors system can get | |
2528 | them. However, if they are zero-sized punt them to yet a different | |
2529 | section (that is not allowed to participate in anchoring). */ | |
2530 | if (!size) | |
2531 | { | |
2532 | fputs ("\t.section\t__DATA,__zobj_data\n", fp); | |
2533 | in_section = darwin_sections[zobj_data_section]; | |
2534 | size = 1; | |
2535 | } | |
2536 | else | |
2537 | { | |
2538 | fputs ("\t.data\n", fp); | |
2539 | in_section = data_section; | |
2540 | } | |
2541 | ||
2542 | if (l2align) | |
2543 | fprintf (fp, "\t.align\t%u\n", l2align); | |
2544 | ||
2545 | assemble_name (fp, name); | |
16998094 | 2546 | fprintf (fp, ":\n\t.space\t" HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); |
46a99b06 IS |
2547 | } |
2548 | else | |
2549 | { | |
2550 | char secnam[64]; | |
2551 | unsigned int flags ; | |
2552 | /* When we are on a non-section anchor target, we can get zero-sized | |
2553 | items here. However, all we need to do is to bump them to one byte | |
2554 | and the section alignment will take care of the rest. */ | |
2555 | snprintf (secnam, 64, "__DATA,__%spu_bss%u", ((size)?"":"zo_"), l2align); | |
2556 | ||
2557 | /* We can't anchor in zerofill sections, because we can't switch | |
2558 | to them and emit a label. */ | |
2559 | flags = SECTION_BSS|SECTION_WRITE|SECTION_NO_ANCHOR; | |
2560 | in_section = get_section (secnam, flags, NULL); | |
2561 | fprintf (fp, "\t.zerofill %s,", secnam); | |
2562 | assemble_name (fp, name); | |
2563 | if (!size) | |
2564 | size = 1; | |
2565 | ||
2566 | if (l2align) | |
16998094 | 2567 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", size, l2align); |
46a99b06 | 2568 | else |
16998094 | 2569 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); |
46a99b06 IS |
2570 | } |
2571 | (* targetm.encode_section_info) (decl, DECL_RTL (decl), false); | |
2572 | } | |
2573 | ||
2574 | /* Output a chunk of common, with alignment specified (where the target | |
2575 | supports this). */ | |
2576 | void | |
2577 | darwin_asm_output_aligned_decl_common (FILE *fp, tree decl, const char *name, | |
2578 | unsigned HOST_WIDE_INT size, | |
2579 | unsigned int align) | |
2580 | { | |
2581 | unsigned int l2align; | |
2582 | bool one, weak; | |
d764a8e6 IS |
2583 | tree meta; |
2584 | ||
46a99b06 IS |
2585 | /* No corresponding var. */ |
2586 | if (decl==NULL) | |
2587 | { | |
2588 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2589 | fprintf (fp, "# adcom: %s (%d,%d) decl=0x0\n", name, (int)size, (int)align); | |
2590 | #endif | |
2591 | darwin_emit_common (fp, name, size, align); | |
2592 | return; | |
2593 | } | |
2594 | ||
2595 | one = DECL_ONE_ONLY (decl); | |
2596 | weak = (DECL_P (decl) | |
2597 | && DECL_WEAK (decl) | |
2598 | && !lookup_attribute ("weak_import", | |
2599 | DECL_ATTRIBUTES (decl))); | |
2600 | ||
2601 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2602 | fprintf (fp, "# adcom: %s (%lld,%d) ro %d cst %d stat %d com %d pub %d" | |
2603 | " weak %d one %d init %lx\n", | |
2604 | name, (long long)size, (int)align, TREE_READONLY (decl), | |
2605 | TREE_CONSTANT (decl), TREE_STATIC (decl), DECL_COMMON (decl), | |
2606 | TREE_PUBLIC (decl), weak, one, (unsigned long)DECL_INITIAL (decl)); | |
2607 | #endif | |
2608 | ||
d764a8e6 IS |
2609 | /* ObjC metadata can get put in BSS because varasm.c decides it's BSS |
2610 | before the target has a chance to comment. */ | |
2611 | if ((meta = is_objc_metadata (decl))) | |
2612 | { | |
2613 | darwin_emit_objc_zeroed (fp, decl, name, size, DECL_ALIGN (decl), meta); | |
2614 | return; | |
2615 | } | |
2616 | ||
46a99b06 IS |
2617 | /* We shouldn't be messing with this if the decl has a section name. */ |
2618 | gcc_assert (DECL_SECTION_NAME (decl) == NULL); | |
2619 | ||
2620 | /* We would rather not have to check this here - but it seems that we might | |
2621 | be passed a decl that should be in coalesced space. */ | |
2622 | if (one || weak) | |
2623 | { | |
2624 | /* Weak or COMDAT objects are put in mergable sections. */ | |
2625 | darwin_emit_weak_or_comdat (fp, decl, name, size, | |
2626 | DECL_ALIGN (decl)); | |
2627 | return; | |
2628 | } | |
2629 | ||
2630 | /* We should only get here for DECL_COMMON, with a zero init (and, in | |
2631 | principle, only for public symbols too - although we deal with local | |
2632 | ones below). */ | |
2633 | ||
2634 | /* Check the initializer is OK. */ | |
2635 | gcc_assert (DECL_COMMON (decl) | |
2636 | && ((DECL_INITIAL (decl) == NULL) | |
2637 | || (DECL_INITIAL (decl) == error_mark_node) | |
2638 | || initializer_zerop (DECL_INITIAL (decl)))); | |
2639 | ||
2640 | last_assemble_variable_decl = decl; | |
2641 | ||
2642 | if (!size || !align) | |
2643 | align = DECL_ALIGN (decl); | |
2644 | ||
2645 | l2align = floor_log2 (align / BITS_PER_UNIT); | |
2646 | /* Check we aren't asking for more aligment than the platform allows. */ | |
2647 | gcc_assert (l2align <= L2_MAX_OFILE_ALIGNMENT); | |
2648 | ||
2649 | if (TREE_PUBLIC (decl) != 0) | |
2650 | darwin_emit_common (fp, name, size, align); | |
2651 | else | |
2652 | darwin_emit_local_bss (fp, decl, name, size, l2align); | |
2653 | } | |
2654 | ||
2655 | /* Output a chunk of BSS with alignment specfied. */ | |
2656 | void | |
2657 | darwin_asm_output_aligned_decl_local (FILE *fp, tree decl, const char *name, | |
2658 | unsigned HOST_WIDE_INT size, | |
2659 | unsigned int align) | |
2660 | { | |
2661 | unsigned long l2align; | |
2662 | bool one, weak; | |
d764a8e6 | 2663 | tree meta; |
46a99b06 IS |
2664 | |
2665 | one = DECL_ONE_ONLY (decl); | |
2666 | weak = (DECL_P (decl) | |
2667 | && DECL_WEAK (decl) | |
2668 | && !lookup_attribute ("weak_import", | |
2669 | DECL_ATTRIBUTES (decl))); | |
2670 | ||
2671 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2672 | fprintf (fp, "# adloc: %s (%lld,%d) ro %d cst %d stat %d one %d pub %d" | |
2673 | " weak %d init %lx\n", | |
2674 | name, (long long)size, (int)align, TREE_READONLY (decl), | |
2675 | TREE_CONSTANT (decl), TREE_STATIC (decl), one, TREE_PUBLIC (decl), | |
2676 | weak , (unsigned long)DECL_INITIAL (decl)); | |
2677 | #endif | |
2678 | ||
d764a8e6 IS |
2679 | /* ObjC metadata can get put in BSS because varasm.c decides it's BSS |
2680 | before the target has a chance to comment. */ | |
2681 | if ((meta = is_objc_metadata (decl))) | |
2682 | { | |
2683 | darwin_emit_objc_zeroed (fp, decl, name, size, DECL_ALIGN (decl), meta); | |
2684 | return; | |
2685 | } | |
2686 | ||
46a99b06 IS |
2687 | /* We shouldn't be messing with this if the decl has a section name. */ |
2688 | gcc_assert (DECL_SECTION_NAME (decl) == NULL); | |
2689 | ||
2690 | /* We would rather not have to check this here - but it seems that we might | |
2691 | be passed a decl that should be in coalesced space. */ | |
2692 | if (one || weak) | |
2693 | { | |
2694 | /* Weak or COMDAT objects are put in mergable sections. */ | |
2695 | darwin_emit_weak_or_comdat (fp, decl, name, size, | |
2696 | DECL_ALIGN (decl)); | |
2697 | return; | |
2698 | } | |
2699 | ||
2700 | /* .. and it should be suitable for placement in local mem. */ | |
2701 | gcc_assert(!TREE_PUBLIC (decl) && !DECL_COMMON (decl)); | |
2702 | /* .. and any initializer must be all-zero. */ | |
2703 | gcc_assert ((DECL_INITIAL (decl) == NULL) | |
2704 | || (DECL_INITIAL (decl) == error_mark_node) | |
2705 | || initializer_zerop (DECL_INITIAL (decl))); | |
2706 | ||
2707 | last_assemble_variable_decl = decl; | |
2708 | ||
2709 | if (!size || !align) | |
2710 | align = DECL_ALIGN (decl); | |
2711 | ||
2712 | l2align = floor_log2 (align / BITS_PER_UNIT); | |
2713 | gcc_assert (l2align <= L2_MAX_OFILE_ALIGNMENT); | |
2714 | ||
2715 | darwin_emit_local_bss (fp, decl, name, size, l2align); | |
e4f7c483 AS |
2716 | } |
2717 | ||
6ce4806b MA |
2718 | /* Emit an assembler directive to set visibility for a symbol. The |
2719 | only supported visibilities are VISIBILITY_DEFAULT and | |
2720 | VISIBILITY_HIDDEN; the latter corresponds to Darwin's "private | |
2721 | extern". There is no MACH-O equivalent of ELF's | |
2722 | VISIBILITY_INTERNAL or VISIBILITY_PROTECTED. */ | |
2723 | ||
083cad55 | 2724 | void |
6ce4806b MA |
2725 | darwin_assemble_visibility (tree decl, int vis) |
2726 | { | |
2727 | if (vis == VISIBILITY_DEFAULT) | |
2728 | ; | |
b674cffe | 2729 | else if (vis == VISIBILITY_HIDDEN || vis == VISIBILITY_INTERNAL) |
6ce4806b MA |
2730 | { |
2731 | fputs ("\t.private_extern ", asm_out_file); | |
2732 | assemble_name (asm_out_file, | |
2733 | (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)))); | |
2734 | fputs ("\n", asm_out_file); | |
2735 | } | |
2736 | else | |
b674cffe | 2737 | warning (OPT_Wattributes, "protected visibility attribute " |
5c498b10 | 2738 | "not supported in this configuration; ignored"); |
6ce4806b MA |
2739 | } |
2740 | ||
9771b263 | 2741 | /* vec used by darwin_asm_dwarf_section. |
de4df14c IS |
2742 | Maybe a hash tab would be better here - but the intention is that this is |
2743 | a very short list (fewer than 16 items) and each entry should (ideally, | |
2744 | eventually) only be presented once. | |
2745 | ||
2746 | A structure to hold a dwarf debug section used entry. */ | |
2747 | ||
2748 | typedef struct GTY(()) dwarf_sect_used_entry { | |
2749 | const char *name; | |
2750 | unsigned count; | |
2751 | } | |
2752 | dwarf_sect_used_entry; | |
2753 | ||
de4df14c IS |
2754 | |
2755 | /* A list of used __DWARF sections. */ | |
9771b263 | 2756 | static GTY (()) vec<dwarf_sect_used_entry, va_gc> *dwarf_sect_names_table; |
de4df14c IS |
2757 | |
2758 | /* This is called when we are asked to assemble a named section and the | |
2759 | name begins with __DWARF,. We keep a list of the section names (without | |
2760 | the __DWARF, prefix) and use this to emit our required start label on the | |
2761 | first switch to each section. */ | |
2762 | ||
2763 | static void | |
2764 | darwin_asm_dwarf_section (const char *name, unsigned int flags, | |
2765 | tree ARG_UNUSED (decl)) | |
2766 | { | |
2767 | unsigned i; | |
2768 | int namelen; | |
2769 | const char * sname; | |
2770 | dwarf_sect_used_entry *ref; | |
2771 | bool found = false; | |
2772 | gcc_assert ((flags & (SECTION_DEBUG | SECTION_NAMED)) | |
2773 | == (SECTION_DEBUG | SECTION_NAMED)); | |
2774 | /* We know that the name starts with __DWARF, */ | |
2775 | sname = name + 8; | |
2776 | namelen = strchr (sname, ',') - sname; | |
2777 | gcc_assert (namelen); | |
2778 | if (dwarf_sect_names_table == NULL) | |
9771b263 | 2779 | vec_alloc (dwarf_sect_names_table, 16); |
de4df14c IS |
2780 | else |
2781 | for (i = 0; | |
9771b263 | 2782 | dwarf_sect_names_table->iterate (i, &ref); |
de4df14c IS |
2783 | i++) |
2784 | { | |
2785 | if (!ref) | |
2786 | break; | |
2787 | if (!strcmp (ref->name, sname)) | |
2788 | { | |
2789 | found = true; | |
2790 | ref->count++; | |
2791 | break; | |
2792 | } | |
2793 | } | |
2794 | ||
2795 | fprintf (asm_out_file, "\t.section %s\n", name); | |
2796 | if (!found) | |
2797 | { | |
2798 | dwarf_sect_used_entry e; | |
2799 | fprintf (asm_out_file, "Lsection%.*s:\n", namelen, sname); | |
2800 | e.count = 1; | |
2801 | e.name = xstrdup (sname); | |
9771b263 | 2802 | vec_safe_push (dwarf_sect_names_table, e); |
de4df14c IS |
2803 | } |
2804 | } | |
2805 | ||
7606e68f SS |
2806 | /* Output a difference of two labels that will be an assembly time |
2807 | constant if the two labels are local. (.long lab1-lab2 will be | |
2808 | very different if lab1 is at the boundary between two sections; it | |
2809 | will be relocated according to the second section, not the first, | |
2810 | so one ends up with a difference between labels in different | |
2811 | sections, which is bad in the dwarf2 eh context for instance.) */ | |
2812 | ||
2813 | static int darwin_dwarf_label_counter; | |
2814 | ||
2815 | void | |
59d8fe27 | 2816 | darwin_asm_output_dwarf_delta (FILE *file, int size, |
9c808aad | 2817 | const char *lab1, const char *lab2) |
7606e68f | 2818 | { |
4746cf84 MA |
2819 | int islocaldiff = (lab1[0] == '*' && lab1[1] == 'L' |
2820 | && lab2[0] == '*' && lab2[1] == 'L'); | |
d4b56511 | 2821 | const char *directive = (size == 8 ? ".quad" : ".long"); |
7606e68f SS |
2822 | |
2823 | if (islocaldiff) | |
2824 | fprintf (file, "\t.set L$set$%d,", darwin_dwarf_label_counter); | |
2825 | else | |
59d8fe27 | 2826 | fprintf (file, "\t%s\t", directive); |
46a99b06 | 2827 | |
57829bc4 | 2828 | assemble_name_raw (file, lab1); |
7606e68f | 2829 | fprintf (file, "-"); |
57829bc4 | 2830 | assemble_name_raw (file, lab2); |
7606e68f | 2831 | if (islocaldiff) |
59d8fe27 | 2832 | fprintf (file, "\n\t%s L$set$%d", directive, darwin_dwarf_label_counter++); |
7606e68f | 2833 | } |
192d0f89 | 2834 | |
192d0f89 GK |
2835 | /* Output an offset in a DWARF section on Darwin. On Darwin, DWARF section |
2836 | offsets are not represented using relocs in .o files; either the | |
2837 | section never leaves the .o file, or the linker or other tool is | |
2838 | responsible for parsing the DWARF and updating the offsets. */ | |
2839 | ||
2840 | void | |
2841 | darwin_asm_output_dwarf_offset (FILE *file, int size, const char * lab, | |
2842 | section *base) | |
2843 | { | |
2844 | char sname[64]; | |
2845 | int namelen; | |
4f8bdef9 | 2846 | |
192d0f89 GK |
2847 | gcc_assert (base->common.flags & SECTION_NAMED); |
2848 | gcc_assert (strncmp (base->named.name, "__DWARF,", 8) == 0); | |
2849 | gcc_assert (strchr (base->named.name + 8, ',')); | |
2850 | ||
2851 | namelen = strchr (base->named.name + 8, ',') - (base->named.name + 8); | |
2852 | sprintf (sname, "*Lsection%.*s", namelen, base->named.name + 8); | |
2853 | darwin_asm_output_dwarf_delta (file, size, lab, sname); | |
2854 | } | |
7606e68f | 2855 | |
b20577ea | 2856 | /* Called from the within the TARGET_ASM_FILE_START for each target. */ |
de4df14c IS |
2857 | |
2858 | void | |
2859 | darwin_file_start (void) | |
2860 | { | |
b20577ea | 2861 | /* Nothing to do. */ |
de4df14c IS |
2862 | } |
2863 | ||
2864 | /* Called for the TARGET_ASM_FILE_END hook. | |
2865 | Emit the mach-o pic indirection data, the lto data and, finally a flag | |
2866 | to tell the linker that it can break the file object into sections and | |
2867 | move those around for efficiency. */ | |
2868 | ||
a5fe455b | 2869 | void |
9c808aad | 2870 | darwin_file_end (void) |
a5fe455b | 2871 | { |
ae526fe5 | 2872 | if (!vec_safe_is_empty (ctors)) |
6a52ccb3 AP |
2873 | finalize_ctors (); |
2874 | if (!vec_safe_is_empty (dtors)) | |
2875 | finalize_dtors (); | |
fb5610fb IS |
2876 | |
2877 | /* If we are expecting to output NeXT ObjC meta-data, (and we actually see | |
2878 | some) then we output the fix-and-continue marker (Image Info). | |
2879 | This applies to Objective C, Objective C++ and LTO with either language | |
2880 | as part of the input. */ | |
2881 | if (flag_next_runtime && objc_metadata_seen) | |
2882 | { | |
2883 | unsigned int flags = 0; | |
2884 | if (flag_objc_abi >= 2) | |
2885 | { | |
2886 | flags = 16; | |
2887 | output_section_asm_op | |
2888 | (darwin_sections[objc2_image_info_section]->unnamed.data); | |
2889 | } | |
2890 | else | |
2891 | output_section_asm_op | |
2892 | (darwin_sections[objc_image_info_section]->unnamed.data); | |
2893 | ||
2894 | ASM_OUTPUT_ALIGN (asm_out_file, 2); | |
2895 | fputs ("L_OBJC_ImageInfo:\n", asm_out_file); | |
2896 | ||
2897 | flags |= (flag_replace_objc_classes && classes_seen) ? 1 : 0; | |
2898 | flags |= flag_objc_gc ? 2 : 0; | |
2899 | ||
2900 | fprintf (asm_out_file, "\t.long\t0\n\t.long\t%u\n", flags); | |
2901 | } | |
2902 | ||
a5fe455b | 2903 | machopic_finish (asm_out_file); |
dcc97066 | 2904 | if (lang_GNU_CXX ()) |
a5fe455b | 2905 | { |
56c779bc GK |
2906 | switch_to_section (darwin_sections[constructor_section]); |
2907 | switch_to_section (darwin_sections[destructor_section]); | |
a5fe455b ZW |
2908 | ASM_OUTPUT_ALIGN (asm_out_file, 1); |
2909 | } | |
c082f9f3 SB |
2910 | |
2911 | /* If there was LTO assembler output, append it to asm_out_file. */ | |
2912 | if (lto_asm_out_name) | |
2913 | { | |
2914 | int n; | |
2915 | char *buf, *lto_asm_txt; | |
2916 | ||
2917 | /* Shouldn't be here if we failed to switch back. */ | |
2918 | gcc_assert (! saved_asm_out_file); | |
2919 | ||
2920 | lto_asm_out_file = fopen (lto_asm_out_name, "r"); | |
2921 | if (lto_asm_out_file == NULL) | |
40fecdd6 JM |
2922 | fatal_error (input_location, |
2923 | "failed to open temporary file %s with LTO output", | |
c082f9f3 SB |
2924 | lto_asm_out_name); |
2925 | fseek (lto_asm_out_file, 0, SEEK_END); | |
2926 | n = ftell (lto_asm_out_file); | |
2927 | if (n > 0) | |
2928 | { | |
2929 | fseek (lto_asm_out_file, 0, SEEK_SET); | |
2930 | lto_asm_txt = buf = (char *) xmalloc (n + 1); | |
2931 | while (fgets (lto_asm_txt, n, lto_asm_out_file)) | |
2932 | fputs (lto_asm_txt, asm_out_file); | |
b20577ea IS |
2933 | /* Put a termination label. */ |
2934 | fprintf (asm_out_file, "\t.section %s,%s,regular,debug\n", | |
2935 | LTO_SEGMENT_NAME, LTO_SECTS_SECTION); | |
2936 | fprintf (asm_out_file, "L_GNU_LTO%d:\t;# end of lto\n", | |
2937 | lto_section_num); | |
2938 | /* Make sure our termination label stays in this section. */ | |
2939 | fputs ("\t.space\t1\n", asm_out_file); | |
c082f9f3 SB |
2940 | } |
2941 | ||
2942 | /* Remove the temporary file. */ | |
2943 | fclose (lto_asm_out_file); | |
2944 | unlink_if_ordinary (lto_asm_out_name); | |
2945 | free (lto_asm_out_name); | |
2946 | } | |
2947 | ||
b20577ea | 2948 | /* Output the names and indices. */ |
9771b263 | 2949 | if (lto_section_names && lto_section_names->length ()) |
c082f9f3 | 2950 | { |
b20577ea IS |
2951 | int count; |
2952 | darwin_lto_section_e *ref; | |
2953 | /* For now, we'll make the offsets 4 bytes and unaligned - we'll fix | |
2954 | the latter up ourselves. */ | |
2955 | const char *op = integer_asm_op (4,0); | |
2956 | ||
2957 | /* Emit the names. */ | |
2958 | fprintf (asm_out_file, "\t.section %s,%s,regular,debug\n", | |
c082f9f3 | 2959 | LTO_SEGMENT_NAME, LTO_NAMES_SECTION); |
9771b263 | 2960 | FOR_EACH_VEC_ELT (*lto_section_names, count, ref) |
b20577ea IS |
2961 | { |
2962 | fprintf (asm_out_file, "L_GNU_LTO_NAME%d:\n", count); | |
2963 | /* We have to jump through hoops to get the values of the intra-section | |
2964 | offsets... */ | |
2965 | fprintf (asm_out_file, | |
2966 | "\t.set L$gnu$lto$noff%d,L_GNU_LTO_NAME%d-L_GNU_LTO_NAME0\n", | |
2967 | count, count); | |
2968 | fprintf (asm_out_file, | |
2969 | "\t.set L$gnu$lto$nsiz%d,L_GNU_LTO_NAME%d-L_GNU_LTO_NAME%d\n", | |
2970 | count, count+1, count); | |
2971 | fprintf (asm_out_file, "\t.asciz\t\"%s\"\n", ref->sectname); | |
2972 | } | |
2973 | fprintf (asm_out_file, "L_GNU_LTO_NAME%d:\t;# end\n", lto_section_num); | |
2974 | /* make sure our termination label stays in this section. */ | |
2975 | fputs ("\t.space\t1\n", asm_out_file); | |
2976 | ||
2977 | /* Emit the Index. */ | |
2978 | fprintf (asm_out_file, "\t.section %s,%s,regular,debug\n", | |
2979 | LTO_SEGMENT_NAME, LTO_INDEX_SECTION); | |
2980 | fputs ("\t.align\t2\n", asm_out_file); | |
2981 | fputs ("# Section offset, Section length, Name offset, Name length\n", | |
2982 | asm_out_file); | |
9771b263 | 2983 | FOR_EACH_VEC_ELT (*lto_section_names, count, ref) |
b20577ea IS |
2984 | { |
2985 | fprintf (asm_out_file, "%s L$gnu$lto$offs%d\t;# %s\n", | |
2986 | op, count, ref->sectname); | |
2987 | fprintf (asm_out_file, "%s L$gnu$lto$size%d\n", op, count); | |
2988 | fprintf (asm_out_file, "%s L$gnu$lto$noff%d\n", op, count); | |
2989 | fprintf (asm_out_file, "%s L$gnu$lto$nsiz%d\n", op, count); | |
2990 | } | |
c082f9f3 | 2991 | } |
c082f9f3 | 2992 | |
46a99b06 IS |
2993 | /* If we have section anchors, then we must prevent the linker from |
2994 | re-arranging data. */ | |
2995 | if (!DARWIN_SECTION_ANCHORS || !flag_section_anchors) | |
2996 | fprintf (asm_out_file, "\t.subsections_via_symbols\n"); | |
a5fe455b ZW |
2997 | } |
2998 | ||
f475fd3c MS |
2999 | /* TODO: Add a language hook for identifying if a decl is a vtable. */ |
3000 | #define DARWIN_VTABLE_P(DECL) 0 | |
3001 | ||
31920d83 | 3002 | /* Cross-module name binding. Darwin does not support overriding |
f475fd3c | 3003 | functions at dynamic-link time, except for vtables in kexts. */ |
31920d83 DJ |
3004 | |
3005 | bool | |
3101faab | 3006 | darwin_binds_local_p (const_tree decl) |
31920d83 | 3007 | { |
f475fd3c MS |
3008 | return default_binds_local_p_1 (decl, |
3009 | TARGET_KEXTABI && DARWIN_VTABLE_P (decl)); | |
31920d83 DJ |
3010 | } |
3011 | ||
ab0ff804 AP |
3012 | /* The Darwin's implementation of TARGET_ASM_OUTPUT_ANCHOR. Define the |
3013 | anchor relative to ".", the current section position. We cannot use | |
3014 | the default one because ASM_OUTPUT_DEF is wrong for Darwin. */ | |
ab0ff804 AP |
3015 | void |
3016 | darwin_asm_output_anchor (rtx symbol) | |
3017 | { | |
3018 | fprintf (asm_out_file, "\t.set\t"); | |
3019 | assemble_name (asm_out_file, XSTR (symbol, 0)); | |
3020 | fprintf (asm_out_file, ", . + " HOST_WIDE_INT_PRINT_DEC "\n", | |
3021 | SYMBOL_REF_BLOCK_OFFSET (symbol)); | |
3022 | } | |
46a99b06 IS |
3023 | |
3024 | /* Disable section anchoring on any section containing a zero-sized | |
3025 | object. */ | |
3026 | bool | |
3027 | darwin_use_anchors_for_symbol_p (const_rtx symbol) | |
3028 | { | |
3029 | if (DARWIN_SECTION_ANCHORS && flag_section_anchors) | |
3030 | { | |
3031 | section *sect; | |
3032 | /* If the section contains a zero-sized object it's ineligible. */ | |
3033 | sect = SYMBOL_REF_BLOCK (symbol)->sect; | |
3034 | /* This should have the effect of disabling anchors for vars that follow | |
3035 | any zero-sized one, in a given section. */ | |
3036 | if (sect->common.flags & SECTION_NO_ANCHOR) | |
3037 | return false; | |
3038 | ||
3039 | /* Also check the normal reasons for suppressing. */ | |
3040 | return default_use_anchors_for_symbol_p (symbol); | |
3041 | } | |
3042 | else | |
3043 | return false; | |
3044 | } | |
ab0ff804 | 3045 | |
4f8bdef9 EC |
3046 | /* Set the darwin specific attributes on TYPE. */ |
3047 | void | |
3048 | darwin_set_default_type_attributes (tree type) | |
3049 | { | |
3050 | if (darwin_ms_struct | |
3051 | && TREE_CODE (type) == RECORD_TYPE) | |
3052 | TYPE_ATTRIBUTES (type) = tree_cons (get_identifier ("ms_struct"), | |
3053 | NULL_TREE, | |
3054 | TYPE_ATTRIBUTES (type)); | |
3055 | } | |
3056 | ||
3a057207 | 3057 | /* True, iff we're generating code for loadable kernel extensions. */ |
f475fd3c MS |
3058 | |
3059 | bool | |
3060 | darwin_kextabi_p (void) { | |
3061 | return flag_apple_kext; | |
3062 | } | |
3063 | ||
3064 | void | |
3065 | darwin_override_options (void) | |
3066 | { | |
1f81953b IS |
3067 | /* Keep track of which (major) version we're generating code for. */ |
3068 | if (darwin_macosx_version_min) | |
3069 | { | |
3070 | if (strverscmp (darwin_macosx_version_min, "10.6") >= 0) | |
3071 | generating_for_darwin_version = 10; | |
3072 | else if (strverscmp (darwin_macosx_version_min, "10.5") >= 0) | |
3073 | generating_for_darwin_version = 9; | |
3074 | ||
3075 | /* Earlier versions are not specifically accounted, until required. */ | |
3076 | } | |
46a99b06 | 3077 | |
fea3ca91 IS |
3078 | /* In principle, this should be c-family only. However, we really need to |
3079 | set sensible defaults for LTO as well, since the section selection stuff | |
3080 | should check for correctness re. the ABI. TODO: check and provide the | |
3081 | flags (runtime & ABI) from the lto wrapper). */ | |
3082 | ||
3083 | /* Unless set, force ABI=2 for NeXT and m64, 0 otherwise. */ | |
3084 | if (!global_options_set.x_flag_objc_abi) | |
3085 | global_options.x_flag_objc_abi | |
3086 | = (!flag_next_runtime) | |
3087 | ? 0 | |
3088 | : (TARGET_64BIT ? 2 | |
3089 | : (generating_for_darwin_version >= 9) ? 1 | |
3090 | : 0); | |
3091 | ||
3092 | /* Objective-C family ABI 2 is only valid for next/m64 at present. */ | |
3093 | if (global_options_set.x_flag_objc_abi && flag_next_runtime) | |
3094 | { | |
3095 | if (TARGET_64BIT && global_options.x_flag_objc_abi < 2) | |
3096 | error_at (UNKNOWN_LOCATION, "%<-fobjc-abi-version%> >= 2 must be" | |
3097 | " used for %<-m64%> targets with" | |
3098 | " %<-fnext-runtime%>"); | |
3099 | if (!TARGET_64BIT && global_options.x_flag_objc_abi >= 2) | |
3100 | error_at (UNKNOWN_LOCATION, "%<-fobjc-abi-version%> >= 2 is not" | |
3101 | " supported on %<-m32%> targets with" | |
3102 | " %<-fnext-runtime%>"); | |
3103 | } | |
3104 | ||
047a3193 IS |
3105 | /* Don't emit DWARF3/4 unless specifically selected. This is a |
3106 | workaround for tool bugs. */ | |
46a99b06 | 3107 | if (!global_options_set.x_dwarf_strict) |
047a3193 | 3108 | dwarf_strict = 1; |
98095aa3 JJ |
3109 | if (!global_options_set.x_dwarf_version) |
3110 | dwarf_version = 2; | |
047a3193 | 3111 | |
1f81953b IS |
3112 | /* Do not allow unwind tables to be generated by default for m32. |
3113 | fnon-call-exceptions will override this, regardless of what we do. */ | |
3114 | if (generating_for_darwin_version < 10 | |
3115 | && !global_options_set.x_flag_asynchronous_unwind_tables | |
3116 | && !TARGET_64BIT) | |
3117 | global_options.x_flag_asynchronous_unwind_tables = 0; | |
3118 | ||
9d53403c IS |
3119 | /* Disable -freorder-blocks-and-partition when unwind tables are being |
3120 | emitted for Darwin < 9 (OSX 10.5). | |
3121 | The strategy is, "Unless the User has specifically set/unset an unwind | |
3122 | flag we will switch off -freorder-blocks-and-partition when unwind tables | |
3123 | will be generated". If the User specifically sets flags... we assume | |
3124 | (s)he knows why... */ | |
14d11d40 | 3125 | if (generating_for_darwin_version < 9 |
1f81953b IS |
3126 | && global_options_set.x_flag_reorder_blocks_and_partition |
3127 | && ((global_options.x_flag_exceptions /* User, c++, java */ | |
3128 | && !global_options_set.x_flag_exceptions) /* User specified... */ | |
3129 | || (global_options.x_flag_unwind_tables | |
9d53403c | 3130 | && !global_options_set.x_flag_unwind_tables) |
1f81953b | 3131 | || (global_options.x_flag_non_call_exceptions |
9d53403c | 3132 | && !global_options_set.x_flag_non_call_exceptions) |
1f81953b | 3133 | || (global_options.x_flag_asynchronous_unwind_tables |
9d53403c IS |
3134 | && !global_options_set.x_flag_asynchronous_unwind_tables))) |
3135 | { | |
3136 | inform (input_location, | |
3137 | "-freorder-blocks-and-partition does not work with exceptions " | |
3138 | "on this architecture"); | |
3139 | flag_reorder_blocks_and_partition = 0; | |
3140 | flag_reorder_blocks = 1; | |
3141 | } | |
47f447b1 | 3142 | |
f29234df IS |
3143 | /* FIXME: flag_objc_sjlj_exceptions is no longer needed since there is only |
3144 | one valid choice of exception scheme for each runtime. */ | |
3145 | if (!global_options_set.x_flag_objc_sjlj_exceptions) | |
3146 | global_options.x_flag_objc_sjlj_exceptions = | |
3147 | flag_next_runtime && !TARGET_64BIT; | |
3148 | ||
3149 | /* FIXME: and this could be eliminated then too. */ | |
3150 | if (!global_options_set.x_flag_exceptions | |
3151 | && flag_objc_exceptions | |
3152 | && TARGET_64BIT) | |
3153 | flag_exceptions = 1; | |
3154 | ||
f475fd3c MS |
3155 | if (flag_mkernel || flag_apple_kext) |
3156 | { | |
3157 | /* -mkernel implies -fapple-kext for C++ */ | |
dcc97066 | 3158 | if (lang_GNU_CXX ()) |
f475fd3c MS |
3159 | flag_apple_kext = 1; |
3160 | ||
3161 | flag_no_common = 1; | |
3162 | ||
3163 | /* No EH in kexts. */ | |
3164 | flag_exceptions = 0; | |
3165 | /* No -fnon-call-exceptions data in kexts. */ | |
3166 | flag_non_call_exceptions = 0; | |
46a99b06 IS |
3167 | /* so no tables either.. */ |
3168 | flag_unwind_tables = 0; | |
3169 | flag_asynchronous_unwind_tables = 0; | |
9005471b IS |
3170 | /* We still need to emit branch islands for kernel context. */ |
3171 | darwin_emit_branch_islands = true; | |
f475fd3c | 3172 | } |
46a99b06 | 3173 | |
1267ca30 | 3174 | if (flag_var_tracking_uninit == 0 |
89a012ea JH |
3175 | && generating_for_darwin_version >= 9 |
3176 | && (flag_gtoggle ? (debug_info_level == DINFO_LEVEL_NONE) | |
3177 | : (debug_info_level >= DINFO_LEVEL_NORMAL)) | |
3178 | && write_symbols == DWARF2_DEBUG) | |
1267ca30 | 3179 | flag_var_tracking_uninit = flag_var_tracking; |
9005471b | 3180 | |
fee3eacd IS |
3181 | if (MACHO_DYNAMIC_NO_PIC_P) |
3182 | { | |
3183 | if (flag_pic) | |
0e9197f5 IS |
3184 | warning_at (UNKNOWN_LOCATION, 0, |
3185 | "%<-mdynamic-no-pic%> overrides %<-fpic%>, %<-fPIC%>," | |
3186 | " %<-fpie%> or %<-fPIE%>"); | |
fee3eacd IS |
3187 | flag_pic = 0; |
3188 | } | |
3189 | else if (flag_pic == 1) | |
3190 | { | |
3191 | /* Darwin's -fpic is -fPIC. */ | |
3192 | flag_pic = 2; | |
3193 | } | |
3194 | ||
9005471b | 3195 | /* It is assumed that branch island stubs are needed for earlier systems. */ |
1f81953b | 3196 | if (generating_for_darwin_version < 9) |
9005471b | 3197 | darwin_emit_branch_islands = true; |
46a99b06 IS |
3198 | else |
3199 | emit_aligned_common = true; /* Later systems can support aligned common. */ | |
26705988 IS |
3200 | |
3201 | /* The c_dialect...() macros are not available to us here. */ | |
3202 | darwin_running_cxx = (strstr (lang_hooks.name, "C++") != 0); | |
f475fd3c MS |
3203 | } |
3204 | ||
80f8fdf1 IS |
3205 | #if DARWIN_PPC |
3206 | /* Add $LDBL128 suffix to long double builtins for ppc darwin. */ | |
fb220235 FXC |
3207 | |
3208 | static void | |
80f8fdf1 | 3209 | darwin_patch_builtin (enum built_in_function fncode) |
fb220235 | 3210 | { |
e79983f4 | 3211 | tree fn = builtin_decl_explicit (fncode); |
fb220235 FXC |
3212 | tree sym; |
3213 | char *newname; | |
3214 | ||
3215 | if (!fn) | |
3216 | return; | |
3217 | ||
3218 | sym = DECL_ASSEMBLER_NAME (fn); | |
c92712d1 UB |
3219 | newname = ACONCAT (("_", IDENTIFIER_POINTER (sym), "$LDBL128", NULL)); |
3220 | ||
fb220235 | 3221 | set_user_assembler_name (fn, newname); |
fb220235 | 3222 | |
e79983f4 | 3223 | fn = builtin_decl_implicit (fncode); |
fb220235 FXC |
3224 | if (fn) |
3225 | set_user_assembler_name (fn, newname); | |
fb220235 FXC |
3226 | } |
3227 | ||
3228 | void | |
3229 | darwin_patch_builtins (void) | |
3230 | { | |
3231 | if (LONG_DOUBLE_TYPE_SIZE != 128) | |
3232 | return; | |
3233 | ||
3234 | #define PATCH_BUILTIN(fncode) darwin_patch_builtin (fncode); | |
c92712d1 UB |
3235 | #define PATCH_BUILTIN_NO64(fncode) \ |
3236 | if (!TARGET_64BIT) \ | |
fb220235 | 3237 | darwin_patch_builtin (fncode); |
c92712d1 UB |
3238 | #define PATCH_BUILTIN_VARIADIC(fncode) \ |
3239 | if (!TARGET_64BIT \ | |
fb220235 FXC |
3240 | && (strverscmp (darwin_macosx_version_min, "10.3.9") >= 0)) \ |
3241 | darwin_patch_builtin (fncode); | |
3242 | #include "darwin-ppc-ldouble-patch.def" | |
3243 | #undef PATCH_BUILTIN | |
3244 | #undef PATCH_BUILTIN_NO64 | |
3245 | #undef PATCH_BUILTIN_VARIADIC | |
3246 | } | |
80f8fdf1 | 3247 | #endif |
fb220235 | 3248 | |
26705988 IS |
3249 | /* CFStrings implementation. */ |
3250 | static GTY(()) tree cfstring_class_reference = NULL_TREE; | |
3251 | static GTY(()) tree cfstring_type_node = NULL_TREE; | |
3252 | static GTY(()) tree ccfstring_type_node = NULL_TREE; | |
3253 | static GTY(()) tree pccfstring_type_node = NULL_TREE; | |
3254 | static GTY(()) tree pcint_type_node = NULL_TREE; | |
3255 | static GTY(()) tree pcchar_type_node = NULL_TREE; | |
3256 | ||
d1d46f9f | 3257 | static enum built_in_function darwin_builtin_cfstring; |
26705988 IS |
3258 | |
3259 | /* Store all constructed constant CFStrings in a hash table so that | |
3260 | they get uniqued properly. */ | |
3261 | ||
2a22f99c | 3262 | typedef struct GTY ((for_user)) cfstring_descriptor { |
26705988 IS |
3263 | /* The string literal. */ |
3264 | tree literal; | |
3265 | /* The resulting constant CFString. */ | |
3266 | tree constructor; | |
3267 | } cfstring_descriptor; | |
3268 | ||
ca752f39 | 3269 | struct cfstring_hasher : ggc_ptr_hash<cfstring_descriptor> |
2a22f99c TS |
3270 | { |
3271 | static hashval_t hash (cfstring_descriptor *); | |
3272 | static bool equal (cfstring_descriptor *, cfstring_descriptor *); | |
3273 | }; | |
26705988 | 3274 | |
2a22f99c | 3275 | static GTY (()) hash_table<cfstring_hasher> *cfstring_htab; |
26705988 IS |
3276 | |
3277 | static tree | |
3278 | add_builtin_field_decl (tree type, const char *name, tree **chain) | |
3279 | { | |
3280 | tree field = build_decl (BUILTINS_LOCATION, FIELD_DECL, | |
3281 | get_identifier (name), type); | |
3282 | ||
3283 | if (*chain != NULL) | |
3284 | **chain = field; | |
3285 | *chain = &DECL_CHAIN (field); | |
3286 | ||
3287 | return field; | |
3288 | } | |
3289 | ||
d1d46f9f MS |
3290 | tree |
3291 | darwin_init_cfstring_builtins (unsigned builtin_cfstring) | |
26705988 IS |
3292 | { |
3293 | tree cfsfun, fields, pccfstring_ftype_pcchar; | |
3294 | tree *chain = NULL; | |
3295 | ||
d1d46f9f MS |
3296 | darwin_builtin_cfstring = |
3297 | (enum built_in_function) builtin_cfstring; | |
26705988 IS |
3298 | |
3299 | /* struct __builtin_CFString { | |
3300 | const int *isa; (will point at | |
3301 | int flags; __CFConstantStringClassReference) | |
3302 | const char *str; | |
3303 | long length; | |
3304 | }; */ | |
3305 | ||
3306 | pcint_type_node = build_pointer_type | |
3307 | (build_qualified_type (integer_type_node, TYPE_QUAL_CONST)); | |
3308 | ||
3309 | pcchar_type_node = build_pointer_type | |
3310 | (build_qualified_type (char_type_node, TYPE_QUAL_CONST)); | |
3311 | ||
3312 | cfstring_type_node = (*lang_hooks.types.make_type) (RECORD_TYPE); | |
3313 | ||
3314 | /* Have to build backwards for finish struct. */ | |
3315 | fields = add_builtin_field_decl (long_integer_type_node, "length", &chain); | |
3316 | add_builtin_field_decl (pcchar_type_node, "str", &chain); | |
3317 | add_builtin_field_decl (integer_type_node, "flags", &chain); | |
3318 | add_builtin_field_decl (pcint_type_node, "isa", &chain); | |
3319 | finish_builtin_struct (cfstring_type_node, "__builtin_CFString", | |
3320 | fields, NULL_TREE); | |
3321 | ||
3322 | /* const struct __builtin_CFstring * | |
3323 | __builtin___CFStringMakeConstantString (const char *); */ | |
3324 | ||
3325 | ccfstring_type_node = build_qualified_type | |
3326 | (cfstring_type_node, TYPE_QUAL_CONST); | |
3327 | pccfstring_type_node = build_pointer_type (ccfstring_type_node); | |
3328 | pccfstring_ftype_pcchar = build_function_type_list | |
3329 | (pccfstring_type_node, pcchar_type_node, NULL_TREE); | |
3330 | ||
3331 | cfsfun = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, | |
3332 | get_identifier ("__builtin___CFStringMakeConstantString"), | |
3333 | pccfstring_ftype_pcchar); | |
3334 | ||
3335 | TREE_PUBLIC (cfsfun) = 1; | |
3336 | DECL_EXTERNAL (cfsfun) = 1; | |
3337 | DECL_ARTIFICIAL (cfsfun) = 1; | |
3338 | /* Make a lang-specific section - dup_lang_specific_decl makes a new node | |
3339 | in place of the existing, which may be NULL. */ | |
3340 | DECL_LANG_SPECIFIC (cfsfun) = NULL; | |
3341 | (*lang_hooks.dup_lang_specific_decl) (cfsfun); | |
3342 | DECL_BUILT_IN_CLASS (cfsfun) = BUILT_IN_MD; | |
d1d46f9f | 3343 | DECL_FUNCTION_CODE (cfsfun) = darwin_builtin_cfstring; |
26705988 IS |
3344 | lang_hooks.builtin_function (cfsfun); |
3345 | ||
3346 | /* extern int __CFConstantStringClassReference[]; */ | |
3347 | cfstring_class_reference = build_decl (BUILTINS_LOCATION, VAR_DECL, | |
3348 | get_identifier ("__CFConstantStringClassReference"), | |
3349 | build_array_type (integer_type_node, NULL_TREE)); | |
3350 | ||
3351 | TREE_PUBLIC (cfstring_class_reference) = 1; | |
3352 | DECL_ARTIFICIAL (cfstring_class_reference) = 1; | |
3353 | (*lang_hooks.decls.pushdecl) (cfstring_class_reference); | |
3354 | DECL_EXTERNAL (cfstring_class_reference) = 1; | |
3355 | rest_of_decl_compilation (cfstring_class_reference, 0, 0); | |
3356 | ||
3357 | /* Initialize the hash table used to hold the constant CFString objects. */ | |
2a22f99c | 3358 | cfstring_htab = hash_table<cfstring_hasher>::create_ggc (31); |
d1d46f9f MS |
3359 | |
3360 | return cfstring_type_node; | |
26705988 IS |
3361 | } |
3362 | ||
3363 | tree | |
3364 | darwin_fold_builtin (tree fndecl, int n_args, tree *argp, | |
3365 | bool ARG_UNUSED (ignore)) | |
3366 | { | |
3367 | unsigned int fcode = DECL_FUNCTION_CODE (fndecl); | |
3368 | ||
d1d46f9f | 3369 | if (fcode == darwin_builtin_cfstring) |
26705988 IS |
3370 | { |
3371 | if (!darwin_constant_cfstrings) | |
3372 | { | |
3373 | error ("built-in function %qD requires the" | |
3374 | " %<-mconstant-cfstrings%> flag", fndecl); | |
3375 | return error_mark_node; | |
3376 | } | |
3377 | ||
3378 | if (n_args != 1) | |
3379 | { | |
3380 | error ("built-in function %qD takes one argument only", fndecl); | |
3381 | return error_mark_node; | |
3382 | } | |
3383 | ||
3384 | return darwin_build_constant_cfstring (*argp); | |
3385 | } | |
3386 | ||
3387 | return NULL_TREE; | |
3388 | } | |
3389 | ||
41cf94fb MS |
3390 | void |
3391 | darwin_rename_builtins (void) | |
3392 | { | |
3393 | /* The system ___divdc3 routine in libSystem on darwin10 is not | |
3394 | accurate to 1ulp, ours is, so we avoid ever using the system name | |
3395 | for this routine and instead install a non-conflicting name that | |
3396 | is accurate. | |
3397 | ||
3398 | When -ffast-math or -funsafe-math-optimizations is given, we can | |
3399 | use the faster version. */ | |
3400 | if (!flag_unsafe_math_optimizations) | |
3401 | { | |
e79983f4 MM |
3402 | enum built_in_function dcode |
3403 | = (enum built_in_function)(BUILT_IN_COMPLEX_DIV_MIN | |
3404 | + DCmode - MIN_MODE_COMPLEX_FLOAT); | |
3405 | tree fn = builtin_decl_explicit (dcode); | |
41cf94fb MS |
3406 | /* Fortran and c call TARGET_INIT_BUILTINS and |
3407 | TARGET_INIT_LIBFUNCS at different times, so we have to put a | |
3408 | call into each to ensure that at least one of them is called | |
3409 | after build_common_builtin_nodes. A better fix is to add a | |
3410 | new hook to run after build_common_builtin_nodes runs. */ | |
3411 | if (fn) | |
3412 | set_user_assembler_name (fn, "___ieee_divdc3"); | |
e79983f4 | 3413 | fn = builtin_decl_implicit (dcode); |
41cf94fb MS |
3414 | if (fn) |
3415 | set_user_assembler_name (fn, "___ieee_divdc3"); | |
3416 | } | |
3417 | } | |
3418 | ||
d33d9e47 AI |
3419 | bool |
3420 | darwin_libc_has_function (enum function_class fn_class) | |
3421 | { | |
3422 | if (fn_class == function_sincos) | |
3423 | return false; | |
3424 | if (fn_class == function_c99_math_complex | |
3425 | || fn_class == function_c99_misc) | |
3426 | return (TARGET_64BIT | |
3427 | || strverscmp (darwin_macosx_version_min, "10.3") >= 0); | |
3428 | ||
3429 | return true; | |
3430 | } | |
3431 | ||
2a22f99c TS |
3432 | hashval_t |
3433 | cfstring_hasher::hash (cfstring_descriptor *ptr) | |
26705988 | 3434 | { |
2a22f99c | 3435 | tree str = ptr->literal; |
26705988 IS |
3436 | const unsigned char *p = (const unsigned char *) TREE_STRING_POINTER (str); |
3437 | int i, len = TREE_STRING_LENGTH (str); | |
3438 | hashval_t h = len; | |
3439 | ||
3440 | for (i = 0; i < len; i++) | |
3441 | h = ((h * 613) + p[i]); | |
3442 | ||
3443 | return h; | |
3444 | } | |
3445 | ||
2a22f99c TS |
3446 | bool |
3447 | cfstring_hasher::equal (cfstring_descriptor *ptr1, cfstring_descriptor *ptr2) | |
26705988 | 3448 | { |
2a22f99c TS |
3449 | tree str1 = ptr1->literal; |
3450 | tree str2 = ptr2->literal; | |
26705988 IS |
3451 | int len1 = TREE_STRING_LENGTH (str1); |
3452 | ||
3453 | return (len1 == TREE_STRING_LENGTH (str2) | |
3454 | && !memcmp (TREE_STRING_POINTER (str1), TREE_STRING_POINTER (str2), | |
3455 | len1)); | |
3456 | } | |
3457 | ||
3458 | tree | |
3459 | darwin_build_constant_cfstring (tree str) | |
3460 | { | |
3461 | struct cfstring_descriptor *desc, key; | |
26705988 IS |
3462 | tree addr; |
3463 | ||
3464 | if (!str) | |
3465 | { | |
3466 | error ("CFString literal is missing"); | |
3467 | return error_mark_node; | |
3468 | } | |
3469 | ||
3470 | STRIP_NOPS (str); | |
3471 | ||
3472 | if (TREE_CODE (str) == ADDR_EXPR) | |
3473 | str = TREE_OPERAND (str, 0); | |
3474 | ||
3475 | if (TREE_CODE (str) != STRING_CST) | |
3476 | { | |
3477 | error ("CFString literal expression is not a string constant"); | |
3478 | return error_mark_node; | |
3479 | } | |
3480 | ||
3481 | /* Perhaps we already constructed a constant CFString just like this one? */ | |
3482 | key.literal = str; | |
2a22f99c TS |
3483 | cfstring_descriptor **loc = cfstring_htab->find_slot (&key, INSERT); |
3484 | desc = *loc; | |
26705988 IS |
3485 | |
3486 | if (!desc) | |
3487 | { | |
3488 | tree var, constructor, field; | |
9771b263 | 3489 | vec<constructor_elt, va_gc> *v = NULL; |
26705988 IS |
3490 | int length = TREE_STRING_LENGTH (str) - 1; |
3491 | ||
3492 | if (darwin_warn_nonportable_cfstrings) | |
3493 | { | |
3494 | const char *s = TREE_STRING_POINTER (str); | |
3495 | int l = 0; | |
3496 | ||
3497 | for (l = 0; l < length; l++) | |
3498 | if (!s[l] || !isascii (s[l])) | |
3499 | { | |
3500 | warning (darwin_warn_nonportable_cfstrings, "%s in CFString literal", | |
3501 | s[l] ? "non-ASCII character" : "embedded NUL"); | |
3502 | break; | |
3503 | } | |
3504 | } | |
3505 | ||
766090c2 | 3506 | *loc = desc = ggc_cleared_alloc<cfstring_descriptor> (); |
26705988 IS |
3507 | desc->literal = str; |
3508 | ||
3509 | /* isa *. */ | |
3510 | field = TYPE_FIELDS (ccfstring_type_node); | |
3511 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, | |
3512 | build1 (ADDR_EXPR, TREE_TYPE (field), | |
3513 | cfstring_class_reference)); | |
3514 | /* flags */ | |
3515 | field = DECL_CHAIN (field); | |
3516 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, | |
3517 | build_int_cst (TREE_TYPE (field), 0x000007c8)); | |
3518 | /* string *. */ | |
3519 | field = DECL_CHAIN (field); | |
3520 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, | |
3521 | build1 (ADDR_EXPR, TREE_TYPE (field), str)); | |
3522 | /* length */ | |
3523 | field = DECL_CHAIN (field); | |
3524 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, | |
3525 | build_int_cst (TREE_TYPE (field), length)); | |
3526 | ||
3527 | constructor = build_constructor (ccfstring_type_node, v); | |
3528 | TREE_READONLY (constructor) = 1; | |
3529 | TREE_CONSTANT (constructor) = 1; | |
3530 | TREE_STATIC (constructor) = 1; | |
3531 | ||
3532 | /* Fromage: The C++ flavor of 'build_unary_op' expects constructor nodes | |
3533 | to have the TREE_HAS_CONSTRUCTOR (...) bit set. However, this file is | |
3534 | being built without any knowledge of C++ tree accessors; hence, we shall | |
3535 | use the generic accessor that TREE_HAS_CONSTRUCTOR actually maps to! */ | |
3536 | if (darwin_running_cxx) | |
3537 | TREE_LANG_FLAG_4 (constructor) = 1; /* TREE_HAS_CONSTRUCTOR */ | |
3538 | ||
3539 | /* Create an anonymous global variable for this CFString. */ | |
3540 | var = build_decl (input_location, CONST_DECL, | |
3541 | NULL, TREE_TYPE (constructor)); | |
3542 | DECL_ARTIFICIAL (var) = 1; | |
3543 | TREE_STATIC (var) = 1; | |
3544 | DECL_INITIAL (var) = constructor; | |
3545 | /* FIXME: This should use a translation_unit_decl to indicate file scope. */ | |
3546 | DECL_CONTEXT (var) = NULL_TREE; | |
3547 | desc->constructor = var; | |
3548 | } | |
3549 | ||
3550 | addr = build1 (ADDR_EXPR, pccfstring_type_node, desc->constructor); | |
3551 | TREE_CONSTANT (addr) = 1; | |
3552 | ||
3553 | return addr; | |
3554 | } | |
3555 | ||
3556 | bool | |
3557 | darwin_cfstring_p (tree str) | |
3558 | { | |
3559 | struct cfstring_descriptor key; | |
26705988 IS |
3560 | |
3561 | if (!str) | |
3562 | return false; | |
3563 | ||
3564 | STRIP_NOPS (str); | |
3565 | ||
3566 | if (TREE_CODE (str) == ADDR_EXPR) | |
3567 | str = TREE_OPERAND (str, 0); | |
3568 | ||
3569 | if (TREE_CODE (str) != STRING_CST) | |
3570 | return false; | |
3571 | ||
3572 | key.literal = str; | |
2a22f99c | 3573 | cfstring_descriptor **loc = cfstring_htab->find_slot (&key, NO_INSERT); |
26705988 IS |
3574 | |
3575 | if (loc) | |
3576 | return true; | |
3577 | ||
3578 | return false; | |
3579 | } | |
3580 | ||
3581 | void | |
3582 | darwin_enter_string_into_cfstring_table (tree str) | |
3583 | { | |
3584 | struct cfstring_descriptor key; | |
26705988 IS |
3585 | |
3586 | key.literal = str; | |
2a22f99c | 3587 | cfstring_descriptor **loc = cfstring_htab->find_slot (&key, INSERT); |
26705988 IS |
3588 | |
3589 | if (!*loc) | |
3590 | { | |
766090c2 | 3591 | *loc = ggc_cleared_alloc<cfstring_descriptor> (); |
26705988 IS |
3592 | ((struct cfstring_descriptor *)*loc)->literal = str; |
3593 | } | |
3594 | } | |
fb220235 | 3595 | |
f16d3f39 JH |
3596 | /* Choose named function section based on its frequency. */ |
3597 | ||
3598 | section * | |
3599 | darwin_function_section (tree decl, enum node_frequency freq, | |
3600 | bool startup, bool exit) | |
3601 | { | |
1f81953b IS |
3602 | /* Decide if we need to put this in a coalescable section. */ |
3603 | bool weak = (decl | |
3604 | && DECL_WEAK (decl) | |
3605 | && (!DECL_ATTRIBUTES (decl) | |
3606 | || !lookup_attribute ("weak_import", | |
3607 | DECL_ATTRIBUTES (decl)))); | |
3608 | ||
3609 | /* If there is a specified section name, we should not be trying to | |
3610 | override. */ | |
f961457f | 3611 | if (decl && DECL_SECTION_NAME (decl) != NULL) |
1f81953b IS |
3612 | return get_named_section (decl, NULL, 0); |
3613 | ||
e0c70bd7 IS |
3614 | /* We always put unlikely executed stuff in the cold section. */ |
3615 | if (freq == NODE_FREQUENCY_UNLIKELY_EXECUTED) | |
3616 | return (weak) ? darwin_sections[text_cold_coal_section] | |
3617 | : darwin_sections[text_cold_section]; | |
3618 | ||
3619 | /* If we have LTO *and* feedback information, then let LTO handle | |
3620 | the function ordering, it makes a better job (for normal, hot, | |
3621 | startup and exit - hence the bailout for cold above). */ | |
3622 | if (in_lto_p && flag_profile_values) | |
3623 | goto default_function_sections; | |
3624 | ||
3625 | /* Non-cold startup code should go to startup subsection. */ | |
3626 | if (startup) | |
3627 | return (weak) ? darwin_sections[text_startup_coal_section] | |
3628 | : darwin_sections[text_startup_section]; | |
f16d3f39 JH |
3629 | |
3630 | /* Similarly for exit. */ | |
e0c70bd7 IS |
3631 | if (exit) |
3632 | return (weak) ? darwin_sections[text_exit_coal_section] | |
3633 | : darwin_sections[text_exit_section]; | |
3634 | ||
3635 | /* Place hot code. */ | |
3636 | if (freq == NODE_FREQUENCY_HOT) | |
3637 | return (weak) ? darwin_sections[text_hot_coal_section] | |
3638 | : darwin_sections[text_hot_section]; | |
3639 | ||
3640 | /* Otherwise, default to the 'normal' non-reordered sections. */ | |
3641 | default_function_sections: | |
3642 | return (weak) ? darwin_sections[text_coal_section] | |
1f81953b | 3643 | : text_section; |
f16d3f39 JH |
3644 | } |
3645 | ||
14d11d40 IS |
3646 | /* When a function is partitioned between sections, we need to insert a label |
3647 | at the start of each new chunk - so that it may become a valid 'atom' for | |
3648 | eh and debug purposes. Without this the linker will emit warnings if one | |
3649 | tries to add line location information (since the switched fragment will | |
3650 | be anonymous). */ | |
3651 | ||
3652 | void | |
3653 | darwin_function_switched_text_sections (FILE *fp, tree decl, bool new_is_cold) | |
3654 | { | |
3655 | char buf[128]; | |
3656 | snprintf (buf, 128, "%s%s",new_is_cold?"__cold_sect_of_":"__hot_sect_of_", | |
3657 | IDENTIFIER_POINTER (DECL_NAME (decl))); | |
3658 | /* Make sure we pick up all the relevant quotes etc. */ | |
3659 | assemble_name_raw (fp, (const char *) buf); | |
3660 | fputs (":\n", fp); | |
3661 | } | |
3662 | ||
e2500fed | 3663 | #include "gt-darwin.h" |