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ee890fe2 | 1 | /* Functions for generic Darwin as target machine for GNU C compiler. |
7adcbafe | 2 | Copyright (C) 1989-2022 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" |
e11c4407 AM |
25 | #include "target.h" |
26 | #include "rtl.h" | |
c7131fb2 AM |
27 | #include "tree.h" |
28 | #include "gimple.h" | |
e11c4407 | 29 | #include "cfghooks.h" |
c7131fb2 | 30 | #include "df.h" |
4d0cdd0c | 31 | #include "memmodel.h" |
e11c4407 AM |
32 | #include "tm_p.h" |
33 | #include "stringpool.h" | |
314e6352 | 34 | #include "attribs.h" |
ee890fe2 | 35 | #include "insn-config.h" |
e11c4407 AM |
36 | #include "emit-rtl.h" |
37 | #include "cgraph.h" | |
38 | #include "lto-streamer.h" | |
ee890fe2 | 39 | #include "output.h" |
d8a2d370 DN |
40 | #include "varasm.h" |
41 | #include "stor-layout.h" | |
36566b39 | 42 | #include "explow.h" |
ee890fe2 | 43 | #include "expr.h" |
3ac88239 | 44 | #include "langhooks.h" |
c3c669ac | 45 | #include "targhooks.h" |
4c714dd4 | 46 | #include "toplev.h" |
4000360e | 47 | #include "lto-section-names.h" |
1d28bbdf | 48 | #include "intl.h" |
23cb6f8e | 49 | #include "optabs.h" |
66168f96 | 50 | #include "flags.h" |
00f34291 | 51 | #include "opts.h" |
ee890fe2 | 52 | |
a1f37c3f IS |
53 | /* Fix and Continue. |
54 | ||
55 | NOTES: | |
56 | 1) this facility requires suitable support from a modified version | |
57 | of GDB, which is not provided on any system after MacOS 10.7/Darwin11. | |
58 | 2) There is no support for this in any X86 version of the FSF compiler. | |
59 | ||
60 | Fix and continue was used on some earlier MacOS systems for rapid turn | |
61 | around debugging. When code is compiled with the -mfix-and-continue | |
62 | flag, two changes are made to the generated code that allow the system | |
63 | to do things that it would normally not be able to do easily. These | |
64 | changes allow gdb to load in recompilation of a translation unit that | |
65 | has been changed into a running program and replace existing functions | |
66 | and methods of that translation unit with versions of those functions | |
67 | and methods from the newly compiled translation unit. The new functions | |
68 | access the existing static symbols from the old translation unit, if the | |
69 | symbol existed in the unit to be replaced, and from the new translation | |
70 | unit, otherwise. | |
699c914a | 71 | |
de2ab0ca | 72 | The changes are to insert 5 nops at the beginning of all functions |
d6ff8575 | 73 | and to use indirection to get at static symbols. The 5 nops |
699c914a MS |
74 | are required by consumers of the generated code. Currently, gdb |
75 | uses this to patch in a jump to the overriding function, this | |
76 | allows all uses of the old name to forward to the replacement, | |
c112cf2b | 77 | including existing function pointers and virtual methods. See |
699c914a | 78 | rs6000_emit_prologue for the code that handles the nop insertions. |
083cad55 | 79 | |
699c914a | 80 | The added indirection allows gdb to redirect accesses to static |
d6ff8575 MS |
81 | symbols from the newly loaded translation unit to the existing |
82 | symbol, if any. @code{static} symbols are special and are handled by | |
83 | setting the second word in the .non_lazy_symbol_pointer data | |
84 | structure to symbol. See indirect_data for the code that handles | |
85 | the extra indirection, and machopic_output_indirection and its use | |
2161a445 | 86 | of MACHO_SYMBOL_FLAG_STATIC for the code that handles @code{static} |
d6ff8575 | 87 | symbol indirection. */ |
699c914a | 88 | |
6a52ccb3 | 89 | typedef struct GTY(()) cdtor_record { |
ae526fe5 | 90 | rtx symbol; |
6a52ccb3 | 91 | int priority; /* [con/de]structor priority */ |
ae526fe5 | 92 | int position; /* original position */ |
6a52ccb3 | 93 | } cdtor_record; |
ae526fe5 | 94 | |
6a52ccb3 AP |
95 | static GTY(()) vec<cdtor_record, va_gc> *ctors = NULL; |
96 | static GTY(()) vec<cdtor_record, va_gc> *dtors = NULL; | |
ae526fe5 | 97 | |
26705988 IS |
98 | /* A flag to determine whether we are running c++ or obj-c++. This has to be |
99 | settable from non-c-family contexts too (i.e. we can't use the c_dialect_ | |
100 | functions). */ | |
101 | int darwin_running_cxx; | |
102 | ||
1f81953b IS |
103 | /* Some code-gen now depends on OS major version numbers (at least). */ |
104 | int generating_for_darwin_version ; | |
105 | ||
794fa8a6 IS |
106 | /* For older linkers we need to emit special sections (marked 'coalesced') for |
107 | for weak or single-definition items. */ | |
108 | static bool ld_uses_coal_sects = false; | |
109 | ||
dbe89f49 IS |
110 | /* Very old (ld_classic) linkers need a symbol to mark the start of |
111 | each FDE. */ | |
112 | static bool ld_needs_eh_markers = false; | |
113 | ||
66526c6a IS |
114 | /* Emit a section-start symbol for mod init and term sections. */ |
115 | static bool ld_init_term_start_labels = false; | |
116 | ||
56c779bc GK |
117 | /* Section names. */ |
118 | section * darwin_sections[NUM_DARWIN_SECTIONS]; | |
d6b5193b | 119 | |
fee3eacd | 120 | /* While we transition to using in-tests instead of ifdef'd code. */ |
d0b2266a | 121 | #if !HAVE_lo_sum |
23cb6f8e | 122 | #define gen_macho_high(m,a,b) (a) |
7a40dd5a | 123 | #define gen_macho_low(m,a,b,c) (a) |
fee3eacd IS |
124 | #endif |
125 | ||
4f8bdef9 EC |
126 | /* True if we're setting __attribute__ ((ms_struct)). */ |
127 | int darwin_ms_struct = false; | |
128 | ||
a9e47ccf | 129 | /* Earlier versions of Darwin as do not recognize an alignment field in |
46a99b06 IS |
130 | .comm directives, this should be set for versions that allow it. */ |
131 | int emit_aligned_common = false; | |
132 | ||
d6b5193b RS |
133 | /* A get_unnamed_section callback used to switch to an ObjC section. |
134 | DIRECTIVE is as for output_section_asm_op. */ | |
135 | ||
136 | static void | |
fe7c3ecf | 137 | output_objc_section_asm_op (const char *directive) |
d6b5193b | 138 | { |
56c779bc | 139 | static bool been_here = false; |
d6b5193b | 140 | |
a9e47ccf IS |
141 | /* The NeXT ObjC Runtime requires these sections to be present and in |
142 | order in the object. The code below implements this by emitting | |
83bf7f5e IS |
143 | a section header for each ObjC section the first time that an ObjC |
144 | section is requested. */ | |
bb675539 | 145 | if (darwin_symbol_stubs && ! been_here) |
d6b5193b | 146 | { |
058bfe53 | 147 | section *saved_in_section = in_section; |
083cad55 | 148 | static const enum darwin_section_enum tomark[] = |
56c779bc GK |
149 | { |
150 | /* written, cold -> hot */ | |
151 | objc_cat_cls_meth_section, | |
152 | objc_cat_inst_meth_section, | |
153 | objc_string_object_section, | |
154 | objc_constant_string_object_section, | |
155 | objc_selector_refs_section, | |
156 | objc_selector_fixup_section, | |
157 | objc_cls_refs_section, | |
158 | objc_class_section, | |
159 | objc_meta_class_section, | |
160 | /* shared, hot -> cold */ | |
161 | objc_cls_meth_section, | |
162 | objc_inst_meth_section, | |
163 | objc_protocol_section, | |
164 | objc_class_names_section, | |
165 | objc_meth_var_types_section, | |
166 | objc_meth_var_names_section, | |
167 | objc_category_section, | |
168 | objc_class_vars_section, | |
169 | objc_instance_vars_section, | |
170 | objc_module_info_section, | |
d764a8e6 | 171 | objc_symbols_section, |
56c779bc | 172 | }; |
d764a8e6 IS |
173 | /* ABI=1 */ |
174 | static const enum darwin_section_enum tomarkv1[] = | |
175 | { | |
176 | objc1_protocol_ext_section, | |
177 | objc1_class_ext_section, | |
178 | objc1_prop_list_section | |
179 | } ; | |
180 | /* ABI=2 */ | |
181 | static const enum darwin_section_enum tomarkv2[] = | |
182 | { | |
a788c455 | 183 | objc2_method_names_section, |
d764a8e6 | 184 | objc2_message_refs_section, |
bb675539 IS |
185 | objc2_selector_refs_section, |
186 | objc2_ivar_section, | |
d764a8e6 IS |
187 | objc2_classdefs_section, |
188 | objc2_metadata_section, | |
189 | objc2_classrefs_section, | |
a788c455 | 190 | objc2_class_names_section, |
d764a8e6 IS |
191 | objc2_classlist_section, |
192 | objc2_categorylist_section, | |
d764a8e6 IS |
193 | objc2_nonlazy_class_section, |
194 | objc2_nonlazy_category_section, | |
195 | objc2_protocollist_section, | |
196 | objc2_protocolrefs_section, | |
197 | objc2_super_classrefs_section, | |
bb675539 | 198 | objc2_constant_string_object_section, |
d764a8e6 | 199 | objc2_image_info_section, |
d764a8e6 | 200 | } ; |
56c779bc | 201 | size_t i; |
083cad55 | 202 | |
56c779bc | 203 | been_here = true; |
d764a8e6 IS |
204 | if (flag_objc_abi < 2) |
205 | { | |
206 | for (i = 0; i < ARRAY_SIZE (tomark); i++) | |
207 | switch_to_section (darwin_sections[tomark[i]]); | |
208 | if (flag_objc_abi == 1) | |
209 | for (i = 0; i < ARRAY_SIZE (tomarkv1); i++) | |
210 | switch_to_section (darwin_sections[tomarkv1[i]]); | |
211 | } | |
212 | else | |
213 | for (i = 0; i < ARRAY_SIZE (tomarkv2); i++) | |
214 | switch_to_section (darwin_sections[tomarkv2[i]]); | |
215 | /* Make sure we don't get varasm.c out of sync with us. */ | |
058bfe53 | 216 | switch_to_section (saved_in_section); |
d6b5193b RS |
217 | } |
218 | output_section_asm_op (directive); | |
219 | } | |
220 | ||
d18d5478 JJ |
221 | |
222 | /* Private flag applied to disable section-anchors in a particular section. */ | |
223 | #define SECTION_NO_ANCHOR SECTION_MACH_DEP | |
224 | ||
225 | ||
d6b5193b RS |
226 | /* Implement TARGET_ASM_INIT_SECTIONS. */ |
227 | ||
228 | void | |
229 | darwin_init_sections (void) | |
230 | { | |
56c779bc GK |
231 | #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) \ |
232 | darwin_sections[NAME] = \ | |
233 | get_unnamed_section (FLAGS, (OBJC \ | |
234 | ? output_objc_section_asm_op \ | |
235 | : output_section_asm_op), \ | |
236 | "\t" DIRECTIVE); | |
237 | #include "config/darwin-sections.def" | |
d6b5193b RS |
238 | #undef DEF_SECTION |
239 | ||
56c779bc GK |
240 | readonly_data_section = darwin_sections[const_section]; |
241 | exception_section = darwin_sections[darwin_exception_section]; | |
242 | eh_frame_section = darwin_sections[darwin_eh_frame_section]; | |
794fa8a6 IS |
243 | |
244 | /* If our linker is new enough to coalesce weak symbols, then we | |
245 | can just put picbase_thunks into the text section. */ | |
246 | if (! ld_uses_coal_sects ) | |
247 | darwin_sections[picbase_thunk_section] = text_section; | |
d6b5193b | 248 | } |
699c914a | 249 | |
ee890fe2 | 250 | int |
9c808aad | 251 | name_needs_quotes (const char *name) |
ee890fe2 SS |
252 | { |
253 | int c; | |
254 | while ((c = *name++) != '\0') | |
a9e47ccf | 255 | if (! ISIDNUM (c) |
83bf7f5e | 256 | && c != '.' && c != '$' && c != '_' ) |
ee890fe2 SS |
257 | return 1; |
258 | return 0; | |
259 | } | |
260 | ||
16515e5c | 261 | /* Return true if SYM_REF can be used without an indirection. */ |
fee3eacd | 262 | int |
11abc112 | 263 | machopic_symbol_defined_p (rtx sym_ref) |
ee890fe2 | 264 | { |
2161a445 | 265 | if (MACHO_SYMBOL_DEFINED_P (sym_ref)) |
16515e5c AP |
266 | return true; |
267 | ||
268 | /* If a symbol references local and is not an extern to this | |
269 | file, then the symbol might be able to declared as defined. */ | |
270 | if (SYMBOL_REF_LOCAL_P (sym_ref) && ! SYMBOL_REF_EXTERNAL_P (sym_ref)) | |
271 | { | |
272 | /* If the symbol references a variable and the variable is a | |
273 | common symbol, then this symbol is not defined. */ | |
2161a445 | 274 | if (MACHO_SYMBOL_VARIABLE_P (sym_ref)) |
16515e5c AP |
275 | { |
276 | tree decl = SYMBOL_REF_DECL (sym_ref); | |
277 | if (!decl) | |
278 | return true; | |
279 | if (DECL_COMMON (decl)) | |
280 | return false; | |
281 | } | |
282 | return true; | |
283 | } | |
284 | return false; | |
ee890fe2 SS |
285 | } |
286 | ||
11abc112 MM |
287 | /* This module assumes that (const (symbol_ref "foo")) is a legal pic |
288 | reference, which will not be changed. */ | |
9c808aad | 289 | |
ee890fe2 | 290 | enum machopic_addr_class |
11abc112 | 291 | machopic_classify_symbol (rtx sym_ref) |
ee890fe2 | 292 | { |
11abc112 MM |
293 | bool function_p; |
294 | ||
11abc112 MM |
295 | function_p = SYMBOL_REF_FUNCTION_P (sym_ref); |
296 | if (machopic_symbol_defined_p (sym_ref)) | |
083cad55 | 297 | return (function_p |
11abc112 MM |
298 | ? MACHOPIC_DEFINED_FUNCTION : MACHOPIC_DEFINED_DATA); |
299 | else | |
083cad55 | 300 | return (function_p |
11abc112 | 301 | ? MACHOPIC_UNDEFINED_FUNCTION : MACHOPIC_UNDEFINED_DATA); |
ee890fe2 SS |
302 | } |
303 | ||
699c914a MS |
304 | #ifndef TARGET_FIX_AND_CONTINUE |
305 | #define TARGET_FIX_AND_CONTINUE 0 | |
306 | #endif | |
307 | ||
308 | /* Indicate when fix-and-continue style code generation is being used | |
309 | and when a reference to data should be indirected so that it can be | |
35fd3193 | 310 | rebound in a new translation unit to reference the original instance |
699c914a MS |
311 | of that data. Symbol names that are for code generation local to |
312 | the translation unit are bound to the new translation unit; | |
313 | currently this means symbols that begin with L or _OBJC_; | |
314 | otherwise, we indicate that an indirect reference should be made to | |
315 | permit the runtime to rebind new instances of the translation unit | |
316 | to the original instance of the data. */ | |
317 | ||
318 | static int | |
319 | indirect_data (rtx sym_ref) | |
320 | { | |
321 | int lprefix; | |
322 | const char *name; | |
323 | ||
62baeb4f EC |
324 | /* If we aren't generating fix-and-continue code, don't do anything |
325 | special. */ | |
699c914a MS |
326 | if (TARGET_FIX_AND_CONTINUE == 0) |
327 | return 0; | |
328 | ||
329 | /* Otherwise, all symbol except symbols that begin with L or _OBJC_ | |
330 | are indirected. Symbols that begin with L and _OBJC_ are always | |
331 | bound to the current translation unit as they are used for | |
332 | generated local data of the translation unit. */ | |
333 | ||
334 | name = XSTR (sym_ref, 0); | |
335 | ||
336 | lprefix = (((name[0] == '*' || name[0] == '&') | |
337 | && (name[1] == 'L' || (name[1] == '"' && name[2] == 'L'))) | |
c0129e2d | 338 | || (startswith (name, "_OBJC_"))); |
699c914a MS |
339 | |
340 | return ! lprefix; | |
341 | } | |
342 | ||
ee890fe2 | 343 | static int |
11abc112 | 344 | machopic_data_defined_p (rtx sym_ref) |
ee890fe2 | 345 | { |
699c914a MS |
346 | if (indirect_data (sym_ref)) |
347 | return 0; | |
348 | ||
11abc112 | 349 | switch (machopic_classify_symbol (sym_ref)) |
ee890fe2 SS |
350 | { |
351 | case MACHOPIC_DEFINED_DATA: | |
0e1ad529 | 352 | case MACHOPIC_DEFINED_FUNCTION: |
ee890fe2 SS |
353 | return 1; |
354 | default: | |
355 | return 0; | |
356 | } | |
357 | } | |
358 | ||
ee890fe2 | 359 | void |
11abc112 | 360 | machopic_define_symbol (rtx mem) |
ee890fe2 | 361 | { |
11abc112 | 362 | rtx sym_ref; |
083cad55 | 363 | |
992d08b1 | 364 | gcc_assert (GET_CODE (mem) == MEM); |
11abc112 MM |
365 | sym_ref = XEXP (mem, 0); |
366 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; | |
ee890fe2 SS |
367 | } |
368 | ||
08a6a74b | 369 | /* Return either ORIG or: |
ee890fe2 | 370 | |
08a6a74b | 371 | (const:P (unspec:P [ORIG] UNSPEC_MACHOPIC_OFFSET)) |
11abc112 | 372 | |
08a6a74b | 373 | depending on MACHO_DYNAMIC_NO_PIC_P. */ |
11abc112 | 374 | rtx |
08a6a74b | 375 | machopic_gen_offset (rtx orig) |
11abc112 | 376 | { |
08a6a74b | 377 | if (MACHO_DYNAMIC_NO_PIC_P) |
14a07c92 PB |
378 | return orig; |
379 | else | |
08a6a74b RS |
380 | { |
381 | /* Play games to avoid marking the function as needing pic if we | |
382 | are being called as part of the cost-estimation process. */ | |
04ef80ce | 383 | if (current_ir_type () != IR_GIMPLE || currently_expanding_to_rtl) |
08a6a74b RS |
384 | crtl->uses_pic_offset_table = 1; |
385 | orig = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, orig), | |
386 | UNSPEC_MACHOPIC_OFFSET); | |
387 | return gen_rtx_CONST (Pmode, orig); | |
388 | } | |
14a07c92 PB |
389 | } |
390 | ||
10aabe33 IS |
391 | static GTY(()) const char * function_base_func_name = NULL; |
392 | static GTY(()) unsigned current_pic_label_num = 0; | |
393 | static GTY(()) unsigned emitted_pic_label_num = 0; | |
394 | ||
395 | /* We need to keep one picbase label per function, but (when we emit code | |
396 | to reload the picbase for setjump receiver) we might need to check for | |
397 | a second use. So, only update the picbase label counter when we see a | |
398 | new function. When there's no function decl, we assume that the call is | |
399 | from the x86 stub generation code. */ | |
88d9bfe6 IS |
400 | static void |
401 | update_pic_label_number_if_needed (void) | |
1622229c | 402 | { |
fee3eacd IS |
403 | if (current_function_decl) |
404 | { | |
10aabe33 IS |
405 | |
406 | const char *current_name = | |
fee3eacd IS |
407 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl)); |
408 | if (function_base_func_name != current_name) | |
409 | { | |
410 | ++current_pic_label_num; | |
411 | function_base_func_name = current_name; | |
412 | } | |
413 | } | |
414 | else | |
ee890fe2 | 415 | { |
ee890fe2 | 416 | ++current_pic_label_num; |
fee3eacd | 417 | function_base_func_name = "L_machopic_stub_dummy"; |
ee890fe2 | 418 | } |
88d9bfe6 IS |
419 | } |
420 | ||
421 | void | |
422 | machopic_output_function_base_name (FILE *file) | |
423 | { | |
10aabe33 IS |
424 | /* We should only get here for -fPIC. */ |
425 | gcc_checking_assert (MACHOPIC_PURE); | |
88d9bfe6 IS |
426 | |
427 | update_pic_label_number_if_needed (); | |
10aabe33 | 428 | fprintf (file, "L%u$pb", current_pic_label_num); |
88d9bfe6 IS |
429 | } |
430 | ||
e1c5c877 IS |
431 | char curr_picbasename[32]; |
432 | ||
433 | const char * | |
434 | machopic_get_function_picbase (void) | |
435 | { | |
10aabe33 IS |
436 | /* We should only get here for -fPIC. */ |
437 | gcc_checking_assert (MACHOPIC_PURE); | |
e1c5c877 IS |
438 | |
439 | update_pic_label_number_if_needed (); | |
10aabe33 | 440 | snprintf (curr_picbasename, 32, "L%u$pb", current_pic_label_num); |
e1c5c877 IS |
441 | return (const char *) curr_picbasename; |
442 | } | |
443 | ||
88d9bfe6 IS |
444 | bool |
445 | machopic_should_output_picbase_label (void) | |
446 | { | |
447 | update_pic_label_number_if_needed (); | |
448 | ||
449 | if (current_pic_label_num == emitted_pic_label_num) | |
450 | return false; | |
451 | ||
452 | emitted_pic_label_num = current_pic_label_num; | |
453 | return true; | |
ee890fe2 SS |
454 | } |
455 | ||
11abc112 MM |
456 | /* The suffix attached to non-lazy pointer symbols. */ |
457 | #define NON_LAZY_POINTER_SUFFIX "$non_lazy_ptr" | |
458 | /* The suffix attached to stub symbols. */ | |
459 | #define STUB_SUFFIX "$stub" | |
ee890fe2 | 460 | |
2a22f99c | 461 | typedef struct GTY ((for_user)) machopic_indirection |
ee890fe2 | 462 | { |
11abc112 MM |
463 | /* The SYMBOL_REF for the entity referenced. */ |
464 | rtx symbol; | |
1adaa117 GK |
465 | /* The name of the stub or non-lazy pointer. */ |
466 | const char * ptr_name; | |
11abc112 MM |
467 | /* True iff this entry is for a stub (as opposed to a non-lazy |
468 | pointer). */ | |
469 | bool stub_p; | |
026c3cfd | 470 | /* True iff this stub or pointer has been referenced. */ |
11abc112 | 471 | bool used; |
c89d7d19 IS |
472 | /* True iff a non-lazy symbol pointer should be emitted into the .data |
473 | section, rather than the non-lazy symbol pointers section. The cases | |
474 | for which this occurred seem to have been unintentional, and later | |
475 | toolchains emit all of the indirections to the 'usual' section. We | |
476 | are keeping this in case it is necessary to preserve compatibility with | |
477 | older toolchains. */ | |
478 | bool nlsp_in_data_section; | |
11abc112 MM |
479 | } machopic_indirection; |
480 | ||
ca752f39 | 481 | struct indirection_hasher : ggc_ptr_hash<machopic_indirection> |
2a22f99c TS |
482 | { |
483 | typedef const char *compare_type; | |
484 | static hashval_t hash (machopic_indirection *); | |
485 | static bool equal (machopic_indirection *, const char *); | |
486 | }; | |
487 | ||
11abc112 MM |
488 | /* A table mapping stub names and non-lazy pointer names to |
489 | SYMBOL_REFs for the stubbed-to and pointed-to entities. */ | |
490 | ||
2a22f99c | 491 | static GTY (()) hash_table<indirection_hasher> *machopic_indirections; |
11abc112 MM |
492 | |
493 | /* Return a hash value for a SLOT in the indirections hash table. */ | |
494 | ||
2a22f99c TS |
495 | hashval_t |
496 | indirection_hasher::hash (machopic_indirection *p) | |
11abc112 | 497 | { |
1adaa117 | 498 | return htab_hash_string (p->ptr_name); |
11abc112 | 499 | } |
9c808aad | 500 | |
11abc112 MM |
501 | /* Returns true if the KEY is the same as that associated with |
502 | SLOT. */ | |
503 | ||
2a22f99c TS |
504 | bool |
505 | indirection_hasher::equal (machopic_indirection *s, const char *k) | |
11abc112 | 506 | { |
2a22f99c | 507 | return strcmp (s->ptr_name, k) == 0; |
11abc112 | 508 | } |
ee890fe2 | 509 | |
11abc112 | 510 | /* Return the name of the non-lazy pointer (if STUB_P is false) or |
7881b63f IS |
511 | stub (if STUB_B is true) corresponding to the given name. |
512 | ||
f922d945 | 513 | PR71767 - If we have a situation like: |
7881b63f IS |
514 | |
515 | global_weak_symbol: | |
516 | .... | |
517 | Lnon_weak_local: | |
518 | .... | |
519 | ||
520 | ld64 will be unable to split this into two atoms (because the "L" makes | |
521 | the second symbol 'invisible'). This means that legitimate direct accesses | |
f922d945 IS |
522 | to the second symbol will appear to be direct accesses to an atom of type |
523 | weak, global which are not allowed. | |
7881b63f | 524 | |
f922d945 IS |
525 | To avoid this, we make any data-section indirections have a leading 'l' |
526 | (lower-case L) which has a special meaning: linker can see this and use | |
527 | it to determine atoms, but it is not placed into the final symbol table. | |
7881b63f | 528 | |
f922d945 IS |
529 | Symbols in the non-lazy symbol pointers section (or stubs) do not have this |
530 | problem because ld64 already knows the size of each entry. | |
7881b63f | 531 | */ |
df56a27f | 532 | |
11abc112 MM |
533 | const char * |
534 | machopic_indirection_name (rtx sym_ref, bool stub_p) | |
535 | { | |
11abc112 | 536 | const char *name = XSTR (sym_ref, 0); |
f922d945 | 537 | tree id = maybe_get_identifier (name); |
0a6a4494 AO |
538 | if (id) |
539 | { | |
540 | tree id_orig = id; | |
541 | ||
542 | while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
543 | id = TREE_CHAIN (id); | |
544 | if (id != id_orig) | |
f922d945 | 545 | name = IDENTIFIER_POINTER (id); |
0a6a4494 | 546 | } |
083cad55 | 547 | |
f922d945 IS |
548 | const char *prefix = user_label_prefix; |
549 | /* If we are emitting the label 'verbatim' then omit the U_L_P and count | |
550 | the name without the leading '*'. */ | |
3d20d4d8 | 551 | if (name[0] == '*') |
df56a27f | 552 | { |
3d20d4d8 MS |
553 | prefix = ""; |
554 | ++name; | |
11abc112 | 555 | } |
3d20d4d8 | 556 | |
f922d945 IS |
557 | /* Here we are undoing a number of causes that placed some indirections |
558 | (apparently erroneously) into the .data section. Specifically, some | |
559 | symbols that are ABI mandated indirections and some hidden symbols | |
560 | were being placed there - which cause difficulties with later | |
561 | versions of ld64. Iff (after these checks) some symbol still gets an | |
562 | indirection in the data section, we want to adjust the indirection | |
563 | name to be linker visible to deal with PR71767 (notes above). */ | |
564 | bool nlsp_in_data_section = | |
565 | ! MACHO_SYMBOL_MUST_INDIRECT_P (sym_ref) | |
566 | && ! MACHO_SYMBOL_HIDDEN_VIS_P (sym_ref) | |
567 | && (machopic_symbol_defined_p (sym_ref) || SYMBOL_REF_LOCAL_P (sym_ref)) | |
568 | && ! indirect_data (sym_ref); | |
569 | ||
570 | const char *suffix = stub_p ? STUB_SUFFIX : NON_LAZY_POINTER_SUFFIX; | |
571 | /* If the indirection is in the data section, let the linker see it. */ | |
572 | char L_or_l = (!stub_p && nlsp_in_data_section) ? 'l' : 'L'; | |
573 | /* We have mangled symbols with spaces and punctuation which typically | |
574 | need surrounding in quotes for the assembler to consume them. */ | |
575 | const char *quote = name_needs_quotes (name) ? "\"" : ""; | |
576 | char *buffer = XALLOCAVEC (char, 2 /* strlen ("&L") or ("&l") */ | |
577 | + strlen (prefix) | |
578 | + strlen (name) | |
579 | + strlen (suffix) | |
580 | + 2 * strlen (quote) | |
581 | + 1 /* '\0' */); | |
3d20d4d8 MS |
582 | |
583 | /* Construct the name of the non-lazy pointer or stub. */ | |
f922d945 IS |
584 | sprintf (buffer, "&%s%c%s%s%s%s", quote, L_or_l, prefix, name, |
585 | suffix, quote); | |
3d20d4d8 | 586 | |
1adaa117 | 587 | if (!machopic_indirections) |
2a22f99c | 588 | machopic_indirections = hash_table<indirection_hasher>::create_ggc (37); |
083cad55 | 589 | |
2a22f99c TS |
590 | machopic_indirection **slot |
591 | = machopic_indirections->find_slot_with_hash (buffer, | |
592 | htab_hash_string (buffer), | |
593 | INSERT); | |
f922d945 | 594 | machopic_indirection *p; |
1adaa117 | 595 | if (*slot) |
f922d945 | 596 | p = *slot; |
1adaa117 | 597 | else |
11abc112 | 598 | { |
766090c2 | 599 | p = ggc_alloc<machopic_indirection> (); |
11abc112 | 600 | p->symbol = sym_ref; |
1adaa117 | 601 | p->ptr_name = xstrdup (buffer); |
11abc112 | 602 | p->stub_p = stub_p; |
1adaa117 | 603 | p->used = false; |
f922d945 | 604 | p->nlsp_in_data_section = nlsp_in_data_section; |
1adaa117 | 605 | *slot = p; |
11abc112 | 606 | } |
083cad55 | 607 | |
1adaa117 | 608 | return p->ptr_name; |
ee890fe2 SS |
609 | } |
610 | ||
11abc112 MM |
611 | /* If NAME is the name of a stub or a non-lazy pointer , mark the stub |
612 | or non-lazy pointer as used -- and mark the object to which the | |
613 | pointer/stub refers as used as well, since the pointer/stub will | |
614 | emit a reference to it. */ | |
615 | ||
ee890fe2 | 616 | void |
11abc112 | 617 | machopic_validate_stub_or_non_lazy_ptr (const char *name) |
ee890fe2 | 618 | { |
2a22f99c TS |
619 | machopic_indirection *p |
620 | = machopic_indirections->find_with_hash (name, htab_hash_string (name)); | |
1adaa117 | 621 | if (p && ! p->used) |
11abc112 | 622 | { |
1adaa117 GK |
623 | const char *real_name; |
624 | tree id; | |
083cad55 | 625 | |
1adaa117 GK |
626 | p->used = true; |
627 | ||
ca472546 GK |
628 | /* Do what output_addr_const will do when we actually call it. */ |
629 | if (SYMBOL_REF_DECL (p->symbol)) | |
630 | mark_decl_referenced (SYMBOL_REF_DECL (p->symbol)); | |
631 | ||
632 | real_name = targetm.strip_name_encoding (XSTR (p->symbol, 0)); | |
083cad55 | 633 | |
1adaa117 GK |
634 | id = maybe_get_identifier (real_name); |
635 | if (id) | |
636 | mark_referenced (id); | |
11abc112 | 637 | } |
ee890fe2 SS |
638 | } |
639 | ||
640 | /* Transform ORIG, which may be any data source, to the corresponding | |
641 | source using indirections. */ | |
642 | ||
643 | rtx | |
9c808aad | 644 | machopic_indirect_data_reference (rtx orig, rtx reg) |
ee890fe2 SS |
645 | { |
646 | rtx ptr_ref = orig; | |
9c808aad | 647 | |
ee890fe2 SS |
648 | if (! MACHOPIC_INDIRECT) |
649 | return orig; | |
650 | ||
651 | if (GET_CODE (orig) == SYMBOL_REF) | |
652 | { | |
11abc112 | 653 | int defined = machopic_data_defined_p (orig); |
ab82a49f AP |
654 | |
655 | if (defined && MACHO_DYNAMIC_NO_PIC_P) | |
656 | { | |
fee3eacd IS |
657 | if (DARWIN_PPC) |
658 | { | |
4f8dbd34 | 659 | /* Create a new register for CSE opportunities. */ |
b3a13419 | 660 | rtx hi_reg = (!can_create_pseudo_p () ? reg : gen_reg_rtx (Pmode)); |
23cb6f8e | 661 | emit_insn (gen_macho_high (Pmode, hi_reg, orig)); |
7a40dd5a | 662 | emit_insn (gen_macho_low (Pmode, reg, hi_reg, orig)); |
fee3eacd IS |
663 | return reg; |
664 | } | |
665 | else if (DARWIN_X86) | |
666 | return orig; | |
667 | else | |
ab82a49f | 668 | /* some other cpu -- writeme! */ |
992d08b1 | 669 | gcc_unreachable (); |
ab82a49f | 670 | } |
a3fc4326 | 671 | else if (defined && ! MACHO_SYMBOL_MUST_INDIRECT_P (orig)) |
ee890fe2 | 672 | { |
fee3eacd IS |
673 | rtx offset = NULL; |
674 | if (DARWIN_PPC || HAVE_lo_sum) | |
675 | offset = machopic_gen_offset (orig); | |
ee890fe2 | 676 | |
fee3eacd IS |
677 | if (DARWIN_PPC) |
678 | { | |
b3a13419 ILT |
679 | rtx hi_sum_reg = (!can_create_pseudo_p () |
680 | ? reg | |
681 | : gen_reg_rtx (Pmode)); | |
ee890fe2 | 682 | |
992d08b1 | 683 | gcc_assert (reg); |
ee890fe2 | 684 | |
f7df4a84 | 685 | emit_insn (gen_rtx_SET (hi_sum_reg, |
6f94a68e GK |
686 | gen_rtx_PLUS (Pmode, pic_offset_table_rtx, |
687 | gen_rtx_HIGH (Pmode, offset)))); | |
f7df4a84 | 688 | emit_insn (gen_rtx_SET (reg, |
bc211e05 JH |
689 | gen_rtx_LO_SUM (Pmode, hi_sum_reg, |
690 | copy_rtx (offset)))); | |
ee890fe2 SS |
691 | |
692 | orig = reg; | |
fee3eacd IS |
693 | } |
694 | else if (HAVE_lo_sum) | |
695 | { | |
992d08b1 | 696 | gcc_assert (reg); |
ee890fe2 | 697 | |
f7df4a84 RS |
698 | emit_insn (gen_rtx_SET (reg, gen_rtx_HIGH (Pmode, offset))); |
699 | emit_insn (gen_rtx_SET (reg, gen_rtx_LO_SUM (Pmode, reg, | |
700 | copy_rtx (offset)))); | |
c41c1387 | 701 | emit_use (pic_offset_table_rtx); |
ee890fe2 | 702 | |
6f94a68e | 703 | orig = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, reg); |
fee3eacd | 704 | } |
ee890fe2 SS |
705 | return orig; |
706 | } | |
707 | ||
828a4fe4 | 708 | ptr_ref = (gen_rtx_SYMBOL_REF |
083cad55 | 709 | (Pmode, |
11abc112 | 710 | machopic_indirection_name (orig, /*stub_p=*/false))); |
ee890fe2 | 711 | |
c185c797 | 712 | SYMBOL_REF_DATA (ptr_ref) = SYMBOL_REF_DATA (orig); |
a0e887be | 713 | SYMBOL_REF_FLAGS (ptr_ref) |= MACHO_SYMBOL_FLAG_INDIRECTION; |
c0d594f1 | 714 | |
542a8afa | 715 | ptr_ref = gen_const_mem (Pmode, ptr_ref); |
828a4fe4 | 716 | machopic_define_symbol (ptr_ref); |
ee890fe2 | 717 | |
a9e47ccf IS |
718 | if (DARWIN_X86 |
719 | && reg | |
fee3eacd IS |
720 | && MACHO_DYNAMIC_NO_PIC_P) |
721 | { | |
f7df4a84 | 722 | emit_insn (gen_rtx_SET (reg, ptr_ref)); |
fee3eacd IS |
723 | ptr_ref = reg; |
724 | } | |
725 | ||
ee890fe2 SS |
726 | return ptr_ref; |
727 | } | |
728 | else if (GET_CODE (orig) == CONST) | |
729 | { | |
fee3eacd IS |
730 | /* If "(const (plus ...", walk the PLUS and return that result. |
731 | PLUS processing (below) will restore the "(const ..." if | |
732 | appropriate. */ | |
ee890fe2 | 733 | if (GET_CODE (XEXP (orig, 0)) == PLUS) |
fee3eacd | 734 | return machopic_indirect_data_reference (XEXP (orig, 0), reg); |
a9e47ccf | 735 | else |
fee3eacd IS |
736 | return orig; |
737 | } | |
738 | else if (GET_CODE (orig) == MEM) | |
739 | { | |
a9e47ccf | 740 | XEXP (ptr_ref, 0) = |
fee3eacd IS |
741 | machopic_indirect_data_reference (XEXP (orig, 0), reg); |
742 | return ptr_ref; | |
743 | } | |
744 | else if (GET_CODE (orig) == PLUS) | |
745 | { | |
746 | rtx base, result; | |
ee890fe2 | 747 | |
fee3eacd IS |
748 | /* Legitimize both operands of the PLUS. */ |
749 | base = machopic_indirect_data_reference (XEXP (orig, 0), reg); | |
750 | orig = machopic_indirect_data_reference (XEXP (orig, 1), | |
751 | (base == reg ? 0 : reg)); | |
752 | if (MACHOPIC_INDIRECT && (GET_CODE (orig) == CONST_INT)) | |
0a81f074 | 753 | result = plus_constant (Pmode, base, INTVAL (orig)); |
ee890fe2 | 754 | else |
6f94a68e | 755 | result = gen_rtx_PLUS (Pmode, base, orig); |
ee890fe2 | 756 | |
ee890fe2 SS |
757 | if (MACHOPIC_JUST_INDIRECT && GET_CODE (base) == MEM) |
758 | { | |
759 | if (reg) | |
760 | { | |
761 | emit_move_insn (reg, result); | |
762 | result = reg; | |
763 | } | |
764 | else | |
765 | { | |
766 | result = force_reg (GET_MODE (result), result); | |
767 | } | |
768 | } | |
769 | ||
770 | return result; | |
ee890fe2 SS |
771 | } |
772 | return ptr_ref; | |
773 | } | |
774 | ||
ee890fe2 SS |
775 | /* Transform TARGET (a MEM), which is a function call target, to the |
776 | corresponding symbol_stub if necessary. Return a new MEM. */ | |
777 | ||
778 | rtx | |
9c808aad | 779 | machopic_indirect_call_target (rtx target) |
ee890fe2 | 780 | { |
d308419c | 781 | if (! darwin_symbol_stubs) |
9005471b IS |
782 | return target; |
783 | ||
ee890fe2 SS |
784 | if (GET_CODE (target) != MEM) |
785 | return target; | |
786 | ||
083cad55 | 787 | if (MACHOPIC_INDIRECT |
11abc112 | 788 | && GET_CODE (XEXP (target, 0)) == SYMBOL_REF |
2161a445 | 789 | && ! MACHO_SYMBOL_DEFINED_P (XEXP (target, 0))) |
9c808aad | 790 | { |
11abc112 | 791 | rtx sym_ref = XEXP (target, 0); |
083cad55 | 792 | const char *stub_name = machopic_indirection_name (sym_ref, |
11abc112 | 793 | /*stub_p=*/true); |
ef4bddc2 | 794 | machine_mode mode = GET_MODE (sym_ref); |
083cad55 | 795 | |
11abc112 | 796 | XEXP (target, 0) = gen_rtx_SYMBOL_REF (mode, stub_name); |
c185c797 | 797 | SYMBOL_REF_DATA (XEXP (target, 0)) = SYMBOL_REF_DATA (sym_ref); |
a0e887be | 798 | SYMBOL_REF_FLAGS (XEXP (target, 0)) |= MACHO_SYMBOL_FLAG_INDIRECTION; |
389fdba0 | 799 | MEM_READONLY_P (target) = 1; |
542a8afa | 800 | MEM_NOTRAP_P (target) = 1; |
ee890fe2 SS |
801 | } |
802 | ||
803 | return target; | |
804 | } | |
805 | ||
806 | rtx | |
ef4bddc2 | 807 | machopic_legitimize_pic_address (rtx orig, machine_mode mode, rtx reg) |
ee890fe2 SS |
808 | { |
809 | rtx pic_ref = orig; | |
810 | ||
ab82a49f | 811 | if (! MACHOPIC_INDIRECT) |
ee890fe2 SS |
812 | return orig; |
813 | ||
814 | /* First handle a simple SYMBOL_REF or LABEL_REF */ | |
815 | if (GET_CODE (orig) == LABEL_REF | |
efa57fee | 816 | || GET_CODE (orig) == SYMBOL_REF) |
ee890fe2 SS |
817 | { |
818 | /* addr(foo) = &func+(foo-func) */ | |
ee890fe2 SS |
819 | orig = machopic_indirect_data_reference (orig, reg); |
820 | ||
9c808aad | 821 | if (GET_CODE (orig) == PLUS |
ee890fe2 SS |
822 | && GET_CODE (XEXP (orig, 0)) == REG) |
823 | { | |
824 | if (reg == 0) | |
825 | return force_reg (mode, orig); | |
826 | ||
827 | emit_move_insn (reg, orig); | |
828 | return reg; | |
9c808aad | 829 | } |
ee890fe2 | 830 | |
ee890fe2 SS |
831 | if (GET_CODE (orig) == MEM) |
832 | { | |
833 | if (reg == 0) | |
834 | { | |
6bd2a4f3 | 835 | gcc_assert (!lra_in_progress); |
992d08b1 | 836 | reg = gen_reg_rtx (Pmode); |
ee890fe2 | 837 | } |
9c808aad | 838 | |
fee3eacd | 839 | #if HAVE_lo_sum |
ab82a49f AP |
840 | if (MACHO_DYNAMIC_NO_PIC_P |
841 | && (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
842 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF)) | |
843 | { | |
844 | #if defined (TARGET_TOC) /* ppc */ | |
b3a13419 ILT |
845 | rtx temp_reg = (!can_create_pseudo_p () |
846 | ? reg : | |
847 | gen_reg_rtx (Pmode)); | |
ab82a49f AP |
848 | rtx asym = XEXP (orig, 0); |
849 | rtx mem; | |
850 | ||
23cb6f8e | 851 | emit_insn (gen_macho_high (Pmode, temp_reg, asym)); |
542a8afa | 852 | mem = gen_const_mem (GET_MODE (orig), |
bc211e05 JH |
853 | gen_rtx_LO_SUM (Pmode, temp_reg, |
854 | copy_rtx (asym))); | |
f7df4a84 | 855 | emit_insn (gen_rtx_SET (reg, mem)); |
ab82a49f | 856 | #else |
62baeb4f EC |
857 | /* Some other CPU -- WriteMe! but right now there are no other |
858 | platforms that can use dynamic-no-pic */ | |
992d08b1 | 859 | gcc_unreachable (); |
ab82a49f AP |
860 | #endif |
861 | pic_ref = reg; | |
862 | } | |
863 | else | |
9c808aad | 864 | if (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF |
ee890fe2 SS |
865 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) |
866 | { | |
08a6a74b | 867 | rtx offset = machopic_gen_offset (XEXP (orig, 0)); |
ee890fe2 SS |
868 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
869 | /* Generating a new reg may expose opportunities for | |
870 | common subexpression elimination. */ | |
b3a13419 ILT |
871 | rtx hi_sum_reg = (!can_create_pseudo_p () |
872 | ? reg | |
873 | : gen_reg_rtx (Pmode)); | |
6f94a68e | 874 | rtx mem; |
6f94a68e | 875 | rtx sum; |
083cad55 | 876 | |
6f94a68e GK |
877 | sum = gen_rtx_HIGH (Pmode, offset); |
878 | if (! MACHO_DYNAMIC_NO_PIC_P) | |
879 | sum = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, sum); | |
ee890fe2 | 880 | |
f7df4a84 | 881 | emit_insn (gen_rtx_SET (hi_sum_reg, sum)); |
6f94a68e | 882 | |
542a8afa | 883 | mem = gen_const_mem (GET_MODE (orig), |
083cad55 | 884 | gen_rtx_LO_SUM (Pmode, |
bc211e05 JH |
885 | hi_sum_reg, |
886 | copy_rtx (offset))); | |
d8485bdb | 887 | rtx_insn *insn = emit_insn (gen_rtx_SET (reg, mem)); |
bd94cb6e | 888 | set_unique_reg_note (insn, REG_EQUAL, pic_ref); |
6f94a68e GK |
889 | |
890 | pic_ref = reg; | |
ee890fe2 | 891 | #else |
c41c1387 | 892 | emit_use (gen_rtx_REG (Pmode, PIC_OFFSET_TABLE_REGNUM)); |
6f94a68e | 893 | |
f7df4a84 | 894 | emit_insn (gen_rtx_SET (reg, |
6f94a68e | 895 | gen_rtx_HIGH (Pmode, |
083cad55 | 896 | gen_rtx_CONST (Pmode, |
6f94a68e | 897 | offset)))); |
f7df4a84 | 898 | emit_insn (gen_rtx_SET (reg, |
6f94a68e | 899 | gen_rtx_LO_SUM (Pmode, reg, |
bc211e05 JH |
900 | gen_rtx_CONST (Pmode, |
901 | copy_rtx (offset))))); | |
6f94a68e GK |
902 | pic_ref = gen_rtx_PLUS (Pmode, |
903 | pic_offset_table_rtx, reg); | |
ee890fe2 SS |
904 | #endif |
905 | } | |
906 | else | |
907 | #endif /* HAVE_lo_sum */ | |
908 | { | |
909 | rtx pic = pic_offset_table_rtx; | |
910 | if (GET_CODE (pic) != REG) | |
911 | { | |
912 | emit_move_insn (reg, pic); | |
913 | pic = reg; | |
914 | } | |
ee890fe2 | 915 | |
89bc1d4e | 916 | if (lra_in_progress && HARD_REGISTER_P (pic)) |
6fb5fa3c | 917 | df_set_regs_ever_live (REGNO (pic), true); |
14a07c92 | 918 | pic_ref = gen_rtx_PLUS (Pmode, pic, |
08a6a74b | 919 | machopic_gen_offset (XEXP (orig, 0))); |
ee890fe2 | 920 | } |
9c808aad | 921 | |
ee890fe2 | 922 | #if !defined (TARGET_TOC) |
ee890fe2 | 923 | emit_move_insn (reg, pic_ref); |
542a8afa | 924 | pic_ref = gen_const_mem (GET_MODE (orig), reg); |
f9b0ac3b | 925 | #endif |
ee890fe2 SS |
926 | } |
927 | else | |
928 | { | |
929 | ||
fee3eacd | 930 | #if HAVE_lo_sum |
9c808aad | 931 | if (GET_CODE (orig) == SYMBOL_REF |
ee890fe2 SS |
932 | || GET_CODE (orig) == LABEL_REF) |
933 | { | |
08a6a74b | 934 | rtx offset = machopic_gen_offset (orig); |
ee890fe2 SS |
935 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
936 | rtx hi_sum_reg; | |
937 | ||
938 | if (reg == 0) | |
939 | { | |
6bd2a4f3 | 940 | gcc_assert (!lra_in_progress); |
992d08b1 | 941 | reg = gen_reg_rtx (Pmode); |
ee890fe2 | 942 | } |
9c808aad | 943 | |
ee890fe2 SS |
944 | hi_sum_reg = reg; |
945 | ||
f7df4a84 | 946 | emit_insn (gen_rtx_SET (hi_sum_reg, |
6f94a68e GK |
947 | (MACHO_DYNAMIC_NO_PIC_P) |
948 | ? gen_rtx_HIGH (Pmode, offset) | |
949 | : gen_rtx_PLUS (Pmode, | |
950 | pic_offset_table_rtx, | |
083cad55 | 951 | gen_rtx_HIGH (Pmode, |
6f94a68e | 952 | offset)))); |
f7df4a84 | 953 | emit_insn (gen_rtx_SET (reg, |
6f94a68e | 954 | gen_rtx_LO_SUM (Pmode, |
bc211e05 JH |
955 | hi_sum_reg, |
956 | copy_rtx (offset)))); | |
ee890fe2 SS |
957 | pic_ref = reg; |
958 | #else | |
f7df4a84 RS |
959 | emit_insn (gen_rtx_SET (reg, gen_rtx_HIGH (Pmode, offset))); |
960 | emit_insn (gen_rtx_SET (reg, | |
bc211e05 JH |
961 | gen_rtx_LO_SUM (Pmode, reg, |
962 | copy_rtx (offset)))); | |
6f94a68e GK |
963 | pic_ref = gen_rtx_PLUS (Pmode, |
964 | pic_offset_table_rtx, reg); | |
ee890fe2 SS |
965 | #endif |
966 | } | |
967 | else | |
968 | #endif /* HAVE_lo_sum */ | |
969 | { | |
83cf88cb AP |
970 | if (REG_P (orig) |
971 | || GET_CODE (orig) == SUBREG) | |
ee890fe2 SS |
972 | { |
973 | return orig; | |
974 | } | |
975 | else | |
976 | { | |
977 | rtx pic = pic_offset_table_rtx; | |
978 | if (GET_CODE (pic) != REG) | |
979 | { | |
980 | emit_move_insn (reg, pic); | |
981 | pic = reg; | |
982 | } | |
89bc1d4e IS |
983 | |
984 | if (lra_in_progress && HARD_REGISTER_P (pic)) | |
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 | 993 | if (GET_CODE (pic_ref) != REG) |
ad7c6298 IS |
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 | } | |
ee890fe2 | 1005 | else |
ad7c6298 IS |
1006 | { |
1007 | return pic_ref; | |
1008 | } | |
ee890fe2 | 1009 | } |
ee890fe2 SS |
1010 | else if (GET_CODE (orig) == PLUS |
1011 | && (GET_CODE (XEXP (orig, 0)) == MEM | |
1012 | || GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
1013 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) | |
1014 | && XEXP (orig, 0) != pic_offset_table_rtx | |
1015 | && GET_CODE (XEXP (orig, 1)) != REG) | |
9c808aad | 1016 | |
ee890fe2 SS |
1017 | { |
1018 | rtx base; | |
1019 | int is_complex = (GET_CODE (XEXP (orig, 0)) == MEM); | |
1020 | ||
1021 | base = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
1022 | orig = machopic_legitimize_pic_address (XEXP (orig, 1), | |
1023 | Pmode, (base == reg ? 0 : reg)); | |
1024 | if (GET_CODE (orig) == CONST_INT) | |
1025 | { | |
0a81f074 | 1026 | pic_ref = plus_constant (Pmode, base, INTVAL (orig)); |
ee890fe2 SS |
1027 | is_complex = 1; |
1028 | } | |
1029 | else | |
6f94a68e | 1030 | pic_ref = gen_rtx_PLUS (Pmode, base, orig); |
ee890fe2 | 1031 | |
ee890fe2 SS |
1032 | if (reg && is_complex) |
1033 | { | |
1034 | emit_move_insn (reg, pic_ref); | |
1035 | pic_ref = reg; | |
1036 | } | |
1037 | /* Likewise, should we set special REG_NOTEs here? */ | |
1038 | } | |
ee890fe2 SS |
1039 | else if (GET_CODE (orig) == CONST) |
1040 | { | |
1041 | return machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
1042 | } | |
ee890fe2 SS |
1043 | else if (GET_CODE (orig) == MEM |
1044 | && GET_CODE (XEXP (orig, 0)) == SYMBOL_REF) | |
1045 | { | |
1046 | rtx addr = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
389fdba0 | 1047 | addr = replace_equiv_address (orig, addr); |
ee890fe2 SS |
1048 | emit_move_insn (reg, addr); |
1049 | pic_ref = reg; | |
1050 | } | |
1051 | ||
1052 | return pic_ref; | |
1053 | } | |
1054 | ||
c89d7d19 IS |
1055 | /* Callbacks to output the stub or non-lazy pointers. |
1056 | Each works on the item in *SLOT,if it has been used. | |
1057 | DATA is the FILE* for assembly output. | |
1058 | Called from htab_traverses, invoked from machopic_finish(). */ | |
ee890fe2 | 1059 | |
2a22f99c | 1060 | int |
c89d7d19 | 1061 | machopic_output_data_section_indirection (machopic_indirection **slot, |
7113f1b5 | 1062 | FILE *out_file) |
ee890fe2 | 1063 | { |
2a22f99c | 1064 | machopic_indirection *p = *slot; |
083cad55 | 1065 | |
c89d7d19 | 1066 | if (!p->used || !p->nlsp_in_data_section) |
11abc112 | 1067 | return 1; |
ee890fe2 | 1068 | |
c89d7d19 IS |
1069 | rtx symbol = p->symbol; |
1070 | /* The original symbol name. */ | |
1071 | const char *sym_name = XSTR (symbol, 0); | |
1072 | /* The name of the indirection symbol. */ | |
1073 | const char *ptr_name = p->ptr_name; | |
083cad55 | 1074 | |
c89d7d19 IS |
1075 | switch_to_section (data_section); |
1076 | assemble_align (GET_MODE_ALIGNMENT (Pmode)); | |
7113f1b5 | 1077 | assemble_label (out_file, ptr_name); |
c89d7d19 IS |
1078 | assemble_integer (gen_rtx_SYMBOL_REF (Pmode, sym_name), |
1079 | GET_MODE_SIZE (Pmode), | |
1080 | GET_MODE_ALIGNMENT (Pmode), 1); | |
0a6a4494 | 1081 | |
c89d7d19 IS |
1082 | return 1; |
1083 | } | |
0a6a4494 | 1084 | |
c89d7d19 IS |
1085 | int |
1086 | machopic_output_stub_indirection (machopic_indirection **slot, | |
7113f1b5 | 1087 | FILE *out_file) |
c89d7d19 IS |
1088 | { |
1089 | machopic_indirection *p = *slot; | |
ee890fe2 | 1090 | |
c89d7d19 IS |
1091 | if (!p->used || !p->stub_p) |
1092 | return 1; | |
ee890fe2 | 1093 | |
c89d7d19 IS |
1094 | rtx symbol = p->symbol; |
1095 | /* The original symbol name. */ | |
1096 | const char *sym_name = XSTR (symbol, 0); | |
1097 | /* The name of the stub symbol. */ | |
1098 | const char *ptr_name = p->ptr_name; | |
ee890fe2 | 1099 | |
c89d7d19 IS |
1100 | tree id = maybe_get_identifier (sym_name); |
1101 | if (id) | |
ee890fe2 | 1102 | { |
c89d7d19 IS |
1103 | tree id_orig = id; |
1104 | ||
1105 | while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
1106 | id = TREE_CHAIN (id); | |
1107 | if (id != id_orig) | |
1108 | sym_name = IDENTIFIER_POINTER (id); | |
ee890fe2 | 1109 | } |
c89d7d19 IS |
1110 | |
1111 | char *sym = XALLOCAVEC (char, strlen (sym_name) + 2); | |
1112 | if (sym_name[0] == '*' || sym_name[0] == '&') | |
1113 | strcpy (sym, sym_name + 1); | |
1114 | else if (sym_name[0] == '-' || sym_name[0] == '+') | |
1115 | strcpy (sym, sym_name); | |
11abc112 | 1116 | else |
c89d7d19 | 1117 | sprintf (sym, "%s%s", user_label_prefix, sym_name); |
699c914a | 1118 | |
c89d7d19 IS |
1119 | char *stub = XALLOCAVEC (char, strlen (ptr_name) + 2); |
1120 | if (ptr_name[0] == '*' || ptr_name[0] == '&') | |
1121 | strcpy (stub, ptr_name + 1); | |
1122 | else | |
1123 | sprintf (stub, "%s%s", user_label_prefix, ptr_name); | |
c70d0414 | 1124 | |
7113f1b5 | 1125 | machopic_output_stub (out_file, sym, stub); |
c89d7d19 IS |
1126 | |
1127 | return 1; | |
1128 | } | |
1129 | ||
1130 | int | |
7113f1b5 | 1131 | machopic_output_indirection (machopic_indirection **slot, FILE *out_file) |
c89d7d19 IS |
1132 | { |
1133 | machopic_indirection *p = *slot; | |
1134 | ||
1135 | if (!p->used || p->stub_p || p->nlsp_in_data_section) | |
1136 | return 1; | |
1137 | ||
1138 | rtx symbol = p->symbol; | |
1139 | /* The original symbol name. */ | |
1140 | const char *sym_name = XSTR (symbol, 0); | |
1141 | /* The nonlazy-stub symbol name. */ | |
1142 | const char *ptr_name = p->ptr_name; | |
1143 | ||
1144 | switch_to_section (darwin_sections[machopic_nl_symbol_ptr_section]); | |
1145 | ||
1146 | /* Mach-O symbols are passed around in code through indirect references and | |
1147 | the original symbol_ref hasn't passed through the generic handling and | |
1148 | reference-catching in output_operand, so we need to manually mark weak | |
1149 | references as such. */ | |
1150 | ||
1151 | if (SYMBOL_REF_WEAK (symbol)) | |
1152 | { | |
1153 | tree decl = SYMBOL_REF_DECL (symbol); | |
1154 | gcc_checking_assert (DECL_P (decl)); | |
1155 | ||
1156 | if (decl != NULL_TREE | |
1157 | && DECL_EXTERNAL (decl) && TREE_PUBLIC (decl) | |
1158 | /* Handle only actual external-only definitions, not | |
1159 | e.g. extern inline code or variables for which | |
1160 | storage has been allocated. */ | |
1161 | && !TREE_STATIC (decl)) | |
c70d0414 | 1162 | { |
7113f1b5 ML |
1163 | fputs ("\t.weak_reference ", out_file); |
1164 | assemble_name (out_file, sym_name); | |
1165 | fputc ('\n', out_file); | |
c70d0414 | 1166 | } |
c89d7d19 | 1167 | } |
c70d0414 | 1168 | |
7113f1b5 ML |
1169 | assemble_name (out_file, ptr_name); |
1170 | fprintf (out_file, ":\n"); | |
083cad55 | 1171 | |
7113f1b5 ML |
1172 | fprintf (out_file, "\t.indirect_symbol "); |
1173 | assemble_name (out_file, sym_name); | |
1174 | fprintf (out_file, "\n"); | |
083cad55 | 1175 | |
c89d7d19 IS |
1176 | /* Variables that are marked with MACHO_SYMBOL_FLAG_STATIC need to |
1177 | have their symbol name instead of 0 in the second entry of | |
1178 | the non-lazy symbol pointer data structure when they are | |
1179 | defined. This allows the runtime to rebind newer instances | |
1180 | of the translation unit with the original instance of the | |
1181 | symbol. */ | |
699c914a | 1182 | |
c89d7d19 IS |
1183 | rtx init = const0_rtx; |
1184 | if (MACHO_SYMBOL_STATIC_P (symbol) && machopic_symbol_defined_p (symbol)) | |
1185 | init = gen_rtx_SYMBOL_REF (Pmode, sym_name); | |
699c914a | 1186 | |
c89d7d19 IS |
1187 | assemble_integer (init, GET_MODE_SIZE (Pmode), |
1188 | GET_MODE_ALIGNMENT (Pmode), 1); | |
083cad55 | 1189 | |
11abc112 MM |
1190 | return 1; |
1191 | } | |
1192 | ||
a0f08ece | 1193 | static void |
7113f1b5 | 1194 | machopic_finish (FILE *out_file) |
11abc112 | 1195 | { |
c89d7d19 IS |
1196 | if (!machopic_indirections) |
1197 | return; | |
1198 | ||
1199 | /* First output an symbol indirections that have been placed into .data | |
1200 | (we don't expect these now). */ | |
1201 | machopic_indirections->traverse_noresize | |
7113f1b5 | 1202 | <FILE *, machopic_output_data_section_indirection> (out_file); |
c89d7d19 IS |
1203 | |
1204 | machopic_indirections->traverse_noresize | |
7113f1b5 | 1205 | <FILE *, machopic_output_stub_indirection> (out_file); |
c89d7d19 IS |
1206 | |
1207 | machopic_indirections->traverse_noresize | |
7113f1b5 | 1208 | <FILE *, machopic_output_indirection> (out_file); |
ee890fe2 SS |
1209 | } |
1210 | ||
9c808aad AJ |
1211 | int |
1212 | machopic_operand_p (rtx op) | |
ee890fe2 SS |
1213 | { |
1214 | if (MACHOPIC_JUST_INDIRECT) | |
08a6a74b RS |
1215 | return (GET_CODE (op) == SYMBOL_REF |
1216 | && machopic_symbol_defined_p (op)); | |
1217 | else | |
1218 | return (GET_CODE (op) == CONST | |
1219 | && GET_CODE (XEXP (op, 0)) == UNSPEC | |
1220 | && XINT (XEXP (op, 0), 1) == UNSPEC_MACHOPIC_OFFSET); | |
ee890fe2 | 1221 | } |
df56a27f | 1222 | |
2161a445 IS |
1223 | /* This function: |
1224 | computes and caches a series of flags that characterise the symbol's | |
1225 | properties that affect Mach-O code gen (including accidental cases | |
1226 | from older toolchains). | |
1227 | ||
1228 | TODO: | |
1229 | Here we also need to do enough analysis to determine if a symbol's | |
1230 | name needs to be made linker-visible. This is more tricky - since | |
1231 | it depends on whether we've previously seen a global weak definition | |
1232 | in the same section. | |
1233 | */ | |
df56a27f SS |
1234 | |
1235 | void | |
2161a445 | 1236 | darwin_encode_section_info (tree decl, rtx rtl, int first) |
df56a27f | 1237 | { |
2161a445 IS |
1238 | /* Careful not to prod global register variables. */ |
1239 | if (!MEM_P (rtl)) | |
1240 | return; | |
df56a27f | 1241 | |
2161a445 IS |
1242 | /* Do the standard encoding things first; this sets: |
1243 | SYMBOL_FLAG_FUNCTION, | |
1244 | SYMBOL_FLAG_LOCAL, (binds_local_p) | |
1245 | TLS_MODEL, SYMBOL_FLAG_SMALL | |
1246 | SYMBOL_FLAG_EXTERNAL. */ | |
e1a4211d SS |
1247 | default_encode_section_info (decl, rtl, first); |
1248 | ||
2161a445 | 1249 | if (! VAR_OR_FUNCTION_DECL_P (decl)) |
11abc112 | 1250 | return; |
e1a4211d | 1251 | |
2161a445 IS |
1252 | rtx sym_ref = XEXP (rtl, 0); |
1253 | if (VAR_P (decl)) | |
11abc112 MM |
1254 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_VARIABLE; |
1255 | ||
a3fc4326 IS |
1256 | /* Only really common if there's no initialiser. */ |
1257 | bool really_common_p = (DECL_COMMON (decl) | |
1258 | && (DECL_INITIAL (decl) == NULL | |
1259 | || (!in_lto_p | |
1260 | && DECL_INITIAL (decl) == error_mark_node))); | |
1261 | ||
b393e5ed IS |
1262 | /* For Darwin, if we have specified visibility and it's not the default |
1263 | that's counted 'hidden'. */ | |
1264 | if (DECL_VISIBILITY_SPECIFIED (decl) | |
1265 | && DECL_VISIBILITY (decl) != VISIBILITY_DEFAULT) | |
a3fc4326 | 1266 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_HIDDEN_VIS; |
b393e5ed | 1267 | |
11abc112 | 1268 | if (!DECL_EXTERNAL (decl) |
f1a66265 | 1269 | && (!TREE_PUBLIC (decl) || !DECL_WEAK (decl)) |
a9b0b825 | 1270 | && ! lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)) |
df56a27f SS |
1271 | && ((TREE_STATIC (decl) |
1272 | && (!DECL_COMMON (decl) || !TREE_PUBLIC (decl))) | |
bfbdca0b | 1273 | || (!DECL_COMMON (decl) && DECL_INITIAL (decl) |
abe72dd8 | 1274 | && DECL_INITIAL (decl) != error_mark_node))) |
11abc112 | 1275 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; |
699c914a | 1276 | |
d6ff8575 | 1277 | if (! TREE_PUBLIC (decl)) |
2161a445 | 1278 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_STATIC; |
a3fc4326 IS |
1279 | |
1280 | /* Short cut check for Darwin 'must indirect' rules. */ | |
1281 | if (really_common_p | |
1282 | || (DECL_WEAK (decl) && ! MACHO_SYMBOL_HIDDEN_VIS_P (sym_ref)) | |
1283 | || lookup_attribute ("weakref", DECL_ATTRIBUTES (decl))) | |
1284 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_MUST_INDIRECT; | |
3a73cd7c IS |
1285 | |
1286 | #if DARWIN_PPC | |
1287 | /* Objective C V2 (m64) IVAR offset refs from Apple GCC-4.x have an | |
1288 | indirection for m64 code on PPC. Historically, these indirections | |
1289 | also appear in the .data section. */ | |
1290 | tree o2meta = lookup_attribute ("OBJC2META", DECL_ATTRIBUTES (decl)); | |
1291 | o2meta = o2meta ? TREE_VALUE (o2meta) : NULL_TREE; | |
1292 | ||
c0129e2d | 1293 | if (o2meta && startswith (IDENTIFIER_POINTER (o2meta), "V2_IVRF")) |
3a73cd7c IS |
1294 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_MUST_INDIRECT; |
1295 | #endif | |
4e08ba6c | 1296 | } |
2cc07db4 | 1297 | |
8e3e233b DP |
1298 | void |
1299 | darwin_mark_decl_preserved (const char *name) | |
1300 | { | |
3c5f0425 IS |
1301 | /* Actually we shouldn't mark any local symbol this way, but for now |
1302 | this only happens with ObjC meta-data. */ | |
1303 | if (darwin_label_is_anonymous_local_objc_name (name)) | |
1304 | return; | |
1305 | ||
83bf7f5e | 1306 | fprintf (asm_out_file, "\t.no_dead_strip "); |
8e3e233b DP |
1307 | assemble_name (asm_out_file, name); |
1308 | fputc ('\n', asm_out_file); | |
1309 | } | |
1310 | ||
59ff4a1c | 1311 | static section * |
d56cbcc0 | 1312 | darwin_rodata_section (int use_coal, bool zsize, int reloc) |
59ff4a1c | 1313 | { |
794fa8a6 | 1314 | return (use_coal |
59ff4a1c | 1315 | ? darwin_sections[const_coal_section] |
46a99b06 | 1316 | : (zsize ? darwin_sections[zobj_const_section] |
d56cbcc0 IS |
1317 | : reloc ? darwin_sections[const_data_section] |
1318 | : darwin_sections[const_section])); | |
59ff4a1c | 1319 | } |
9c808aad | 1320 | |
59ff4a1c EC |
1321 | static section * |
1322 | darwin_mergeable_string_section (tree exp, | |
1323 | unsigned HOST_WIDE_INT align) | |
1324 | { | |
a9e47ccf IS |
1325 | /* Darwin's ld expects to see non-writable string literals in the .cstring |
1326 | section. Later versions of ld check and complain when CFStrings are | |
a45a766b IS |
1327 | enabled. Therefore we shall force the strings into .cstring since we |
1328 | don't support writable ones anyway. */ | |
1329 | if ((darwin_constant_cfstrings || flag_merge_constants) | |
59ff4a1c EC |
1330 | && TREE_CODE (exp) == STRING_CST |
1331 | && TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE | |
1332 | && align <= 256 | |
b69d564b JJ |
1333 | && (int_size_in_bytes (TREE_TYPE (exp)) |
1334 | == TREE_STRING_LENGTH (exp)) | |
9c808aad | 1335 | && ((size_t) TREE_STRING_LENGTH (exp) |
3521b33c | 1336 | == strlen (TREE_STRING_POINTER (exp)) + 1)) |
56c779bc | 1337 | return darwin_sections[cstring_section]; |
59ff4a1c | 1338 | |
46a99b06 IS |
1339 | if (DARWIN_SECTION_ANCHORS && flag_section_anchors |
1340 | && TREE_CODE (exp) == STRING_CST | |
1341 | && TREE_STRING_LENGTH (exp) == 0) | |
1342 | return darwin_sections[zobj_const_section]; | |
1343 | ||
59ff4a1c EC |
1344 | return readonly_data_section; |
1345 | } | |
1346 | ||
5708d18d MS |
1347 | #ifndef HAVE_GAS_LITERAL16 |
1348 | #define HAVE_GAS_LITERAL16 0 | |
1349 | #endif | |
1350 | ||
59ff4a1c EC |
1351 | static section * |
1352 | darwin_mergeable_constant_section (tree exp, | |
46a99b06 IS |
1353 | unsigned HOST_WIDE_INT align, |
1354 | bool zsize) | |
59ff4a1c | 1355 | { |
dfb25dfe | 1356 | if (zsize) |
46a99b06 IS |
1357 | return darwin_sections[zobj_const_section]; |
1358 | ||
7ddee9cd IS |
1359 | machine_mode mode = DECL_MODE (exp); |
1360 | if (!flag_merge_constants | |
1361 | || mode == VOIDmode | |
1362 | || mode == BLKmode | |
1363 | || align < 8 | |
1364 | || align > 256 | |
1365 | || (align & (align -1)) != 0) | |
1366 | return readonly_data_section; | |
ae46c4e0 | 1367 | |
7ddee9cd IS |
1368 | /* This will ICE if the mode is not a constant size, but that is reasonable, |
1369 | since one cannot put a variable-sized thing into a constant section, we | |
1370 | shouldn't be trying. */ | |
1371 | const unsigned int modesize = GET_MODE_BITSIZE (mode).to_constant (); | |
1372 | ||
1373 | if (modesize > align) | |
1374 | return readonly_data_section; | |
1375 | ||
1376 | tree size = TYPE_SIZE_UNIT (TREE_TYPE (exp)); | |
1377 | ||
1378 | if (TREE_CODE (size) != INTEGER_CST) | |
1379 | return readonly_data_section; | |
1380 | ||
1381 | unsigned isize = TREE_INT_CST_LOW (size); | |
1382 | if (isize == 4) | |
1383 | return darwin_sections[literal4_section]; | |
1384 | else if (isize == 8) | |
1385 | return darwin_sections[literal8_section]; | |
1386 | else if (HAVE_GAS_LITERAL16 | |
1387 | && TARGET_64BIT | |
1388 | && isize == 16) | |
1389 | return darwin_sections[literal16_section]; | |
59ff4a1c EC |
1390 | |
1391 | return readonly_data_section; | |
1392 | } | |
1393 | ||
50b0b78a IS |
1394 | section * |
1395 | darwin_tm_clone_table_section (void) | |
1396 | { | |
1397 | return get_named_section (NULL, | |
1398 | "__DATA,__tm_clone_table,regular,no_dead_strip", | |
1399 | 3); | |
1400 | } | |
1401 | ||
24c78b3a RH |
1402 | int |
1403 | machopic_reloc_rw_mask (void) | |
1404 | { | |
1405 | return MACHOPIC_INDIRECT ? 3 : 0; | |
1406 | } | |
1407 | ||
d764a8e6 IS |
1408 | /* We have to deal with ObjC/C++ metadata section placement in the common |
1409 | code, since it will also be called from LTO. | |
a9e47ccf | 1410 | |
d764a8e6 IS |
1411 | Return metadata attributes, if present (searching for ABI=2 first) |
1412 | Return NULL_TREE if no such attributes are found. */ | |
1413 | ||
1414 | static tree | |
1415 | is_objc_metadata (tree decl) | |
1416 | { | |
a9e47ccf | 1417 | if (DECL_P (decl) |
d764a8e6 IS |
1418 | && (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == CONST_DECL) |
1419 | && DECL_ATTRIBUTES (decl)) | |
1420 | { | |
1421 | tree meta = lookup_attribute ("OBJC2META", DECL_ATTRIBUTES (decl)); | |
1422 | if (meta) | |
1423 | return meta; | |
1424 | meta = lookup_attribute ("OBJC1META", DECL_ATTRIBUTES (decl)); | |
1425 | if (meta) | |
1426 | return meta; | |
1427 | } | |
1428 | return NULL_TREE; | |
1429 | } | |
1430 | ||
fb5610fb IS |
1431 | static int classes_seen; |
1432 | static int objc_metadata_seen; | |
1433 | ||
d764a8e6 IS |
1434 | /* Return the section required for Objective C ABI 2 metadata. */ |
1435 | static section * | |
1436 | darwin_objc2_section (tree decl ATTRIBUTE_UNUSED, tree meta, section * base) | |
1437 | { | |
1438 | const char *p; | |
1439 | tree ident = TREE_VALUE (meta); | |
1440 | gcc_assert (TREE_CODE (ident) == IDENTIFIER_NODE); | |
1441 | p = IDENTIFIER_POINTER (ident); | |
1442 | ||
75d4d7bc | 1443 | gcc_checking_assert (flag_next_runtime >= 1 && flag_objc_abi == 2); |
d764a8e6 | 1444 | |
fb5610fb | 1445 | objc_metadata_seen = 1; |
d764a8e6 IS |
1446 | |
1447 | if (base == data_section) | |
1448 | base = darwin_sections[objc2_metadata_section]; | |
1449 | ||
1450 | /* Most of the OBJC2 META-data end up in the base section, so check it | |
1451 | first. */ | |
c0129e2d | 1452 | if (startswith (p, "V2_BASE")) |
d764a8e6 | 1453 | return base; |
c0129e2d | 1454 | else if (startswith (p, "V2_CNAM")) |
a788c455 | 1455 | return darwin_sections[objc2_class_names_section]; |
c0129e2d | 1456 | else if (startswith (p, "V2_MNAM")) |
a788c455 | 1457 | return darwin_sections[objc2_method_names_section]; |
c0129e2d | 1458 | else if (startswith (p, "V2_MTYP")) |
a788c455 | 1459 | return darwin_sections[objc2_method_types_section]; |
c0129e2d | 1460 | else if (startswith (p, "V2_STRG")) |
d764a8e6 IS |
1461 | return darwin_sections[cstring_section]; |
1462 | ||
c0129e2d | 1463 | else if (startswith (p, "G2_META") || startswith (p, "G2_CLAS")) |
d764a8e6 | 1464 | return darwin_sections[objc2_classdefs_section]; |
c0129e2d | 1465 | else if (startswith (p, "V2_PCOL")) |
ecd616f6 IS |
1466 | return ld_uses_coal_sects ? darwin_sections[data_coal_section] |
1467 | : darwin_sections[objc2_data_section]; | |
c0129e2d | 1468 | else if (startswith (p, "V2_MREF")) |
d764a8e6 | 1469 | return darwin_sections[objc2_message_refs_section]; |
c0129e2d | 1470 | else if (startswith (p, "V2_CLRF")) |
d764a8e6 | 1471 | return darwin_sections[objc2_classrefs_section]; |
c0129e2d | 1472 | else if (startswith (p, "V2_SURF")) |
d764a8e6 | 1473 | return darwin_sections[objc2_super_classrefs_section]; |
c0129e2d | 1474 | else if (startswith (p, "V2_NLCL")) |
d764a8e6 | 1475 | return darwin_sections[objc2_nonlazy_class_section]; |
c0129e2d | 1476 | else if (startswith (p, "V2_CLAB")) |
fb5610fb IS |
1477 | { |
1478 | classes_seen = 1; | |
1479 | return darwin_sections[objc2_classlist_section]; | |
1480 | } | |
c0129e2d | 1481 | else if (startswith (p, "V2_SRFS")) |
d764a8e6 | 1482 | return darwin_sections[objc2_selector_refs_section]; |
c0129e2d | 1483 | else if (startswith (p, "V2_NLCA")) |
d764a8e6 | 1484 | return darwin_sections[objc2_nonlazy_category_section]; |
c0129e2d | 1485 | else if (startswith (p, "V2_CALA")) |
d764a8e6 IS |
1486 | return darwin_sections[objc2_categorylist_section]; |
1487 | ||
c0129e2d | 1488 | else if (startswith (p, "V2_PLST")) |
d764a8e6 | 1489 | return darwin_sections[objc2_protocollist_section]; |
c0129e2d | 1490 | else if (startswith (p, "V2_PRFS")) |
d764a8e6 IS |
1491 | return darwin_sections[objc2_protocolrefs_section]; |
1492 | ||
c0129e2d | 1493 | else if (startswith (p, "V2_INFO")) |
d764a8e6 IS |
1494 | return darwin_sections[objc2_image_info_section]; |
1495 | ||
c0129e2d | 1496 | else if (startswith (p, "V2_EHTY")) |
794fa8a6 IS |
1497 | return ld_uses_coal_sects ? darwin_sections[data_coal_section] |
1498 | : data_section; | |
d764a8e6 | 1499 | |
c0129e2d | 1500 | else if (startswith (p, "V2_CSTR")) |
d764a8e6 IS |
1501 | return darwin_sections[objc2_constant_string_object_section]; |
1502 | ||
c0129e2d | 1503 | else if (startswith (p, "V2_IVRF")) |
ecd616f6 IS |
1504 | return darwin_sections[objc2_ivar_section]; |
1505 | ||
d764a8e6 IS |
1506 | /* Not recognized, default. */ |
1507 | return base; | |
1508 | } | |
1509 | ||
1510 | /* Return the section required for Objective C ABI 0/1 metadata. */ | |
1511 | static section * | |
1512 | darwin_objc1_section (tree decl ATTRIBUTE_UNUSED, tree meta, section * base) | |
1513 | { | |
1514 | const char *p; | |
1515 | tree ident = TREE_VALUE (meta); | |
1516 | gcc_assert (TREE_CODE (ident) == IDENTIFIER_NODE); | |
1517 | p = IDENTIFIER_POINTER (ident); | |
1518 | ||
75d4d7bc | 1519 | gcc_checking_assert (flag_next_runtime >= 1 && flag_objc_abi < 2); |
fb5610fb IS |
1520 | |
1521 | objc_metadata_seen = 1; | |
d764a8e6 IS |
1522 | |
1523 | /* String sections first, cos there are lots of strings. */ | |
c0129e2d | 1524 | if (startswith (p, "V1_STRG")) |
d764a8e6 | 1525 | return darwin_sections[cstring_section]; |
c0129e2d | 1526 | else if (startswith (p, "V1_CLSN")) |
d764a8e6 | 1527 | return darwin_sections[objc_class_names_section]; |
c0129e2d | 1528 | else if (startswith (p, "V1_METN")) |
d764a8e6 | 1529 | return darwin_sections[objc_meth_var_names_section]; |
c0129e2d | 1530 | else if (startswith (p, "V1_METT")) |
d764a8e6 IS |
1531 | return darwin_sections[objc_meth_var_types_section]; |
1532 | ||
c0129e2d | 1533 | else if (startswith (p, "V1_CLAS")) |
fb5610fb IS |
1534 | { |
1535 | classes_seen = 1; | |
1536 | return darwin_sections[objc_class_section]; | |
1537 | } | |
c0129e2d | 1538 | else if (startswith (p, "V1_META")) |
d764a8e6 | 1539 | return darwin_sections[objc_meta_class_section]; |
c0129e2d | 1540 | else if (startswith (p, "V1_CATG")) |
d764a8e6 | 1541 | return darwin_sections[objc_category_section]; |
c0129e2d | 1542 | else if (startswith (p, "V1_PROT")) |
d764a8e6 IS |
1543 | return darwin_sections[objc_protocol_section]; |
1544 | ||
c0129e2d | 1545 | else if (startswith (p, "V1_CLCV")) |
d764a8e6 | 1546 | return darwin_sections[objc_class_vars_section]; |
c0129e2d | 1547 | else if (startswith (p, "V1_CLIV")) |
d764a8e6 IS |
1548 | return darwin_sections[objc_instance_vars_section]; |
1549 | ||
c0129e2d | 1550 | else if (startswith (p, "V1_CLCM")) |
d764a8e6 | 1551 | return darwin_sections[objc_cls_meth_section]; |
c0129e2d | 1552 | else if (startswith (p, "V1_CLIM")) |
d764a8e6 | 1553 | return darwin_sections[objc_inst_meth_section]; |
c0129e2d | 1554 | else if (startswith (p, "V1_CACM")) |
d764a8e6 | 1555 | return darwin_sections[objc_cat_cls_meth_section]; |
c0129e2d | 1556 | else if (startswith (p, "V1_CAIM")) |
d764a8e6 | 1557 | return darwin_sections[objc_cat_inst_meth_section]; |
c0129e2d | 1558 | else if (startswith (p, "V1_PNSM")) |
d764a8e6 | 1559 | return darwin_sections[objc_cat_inst_meth_section]; |
c0129e2d | 1560 | else if (startswith (p, "V1_PCLM")) |
d764a8e6 IS |
1561 | return darwin_sections[objc_cat_cls_meth_section]; |
1562 | ||
c0129e2d | 1563 | else if (startswith (p, "V1_CLPR")) |
d764a8e6 | 1564 | return darwin_sections[objc_cat_cls_meth_section]; |
c0129e2d | 1565 | else if (startswith (p, "V1_CAPR")) |
d764a8e6 IS |
1566 | return darwin_sections[objc_category_section]; /* ??? CHECK me. */ |
1567 | ||
c0129e2d | 1568 | else if (startswith (p, "V1_PRFS")) |
d764a8e6 | 1569 | return darwin_sections[objc_cat_cls_meth_section]; |
c0129e2d | 1570 | else if (startswith (p, "V1_CLRF")) |
d764a8e6 | 1571 | return darwin_sections[objc_cls_refs_section]; |
c0129e2d | 1572 | else if (startswith (p, "V1_SRFS")) |
d764a8e6 IS |
1573 | return darwin_sections[objc_selector_refs_section]; |
1574 | ||
c0129e2d | 1575 | else if (startswith (p, "V1_MODU")) |
d764a8e6 | 1576 | return darwin_sections[objc_module_info_section]; |
c0129e2d | 1577 | else if (startswith (p, "V1_SYMT")) |
d764a8e6 | 1578 | return darwin_sections[objc_symbols_section]; |
c0129e2d | 1579 | else if (startswith (p, "V1_INFO")) |
d764a8e6 IS |
1580 | return darwin_sections[objc_image_info_section]; |
1581 | ||
c0129e2d | 1582 | else if (startswith (p, "V1_PLST")) |
d764a8e6 | 1583 | return darwin_sections[objc1_prop_list_section]; |
c0129e2d | 1584 | else if (startswith (p, "V1_PEXT")) |
d764a8e6 | 1585 | return darwin_sections[objc1_protocol_ext_section]; |
c0129e2d | 1586 | else if (startswith (p, "V1_CEXT")) |
d764a8e6 IS |
1587 | return darwin_sections[objc1_class_ext_section]; |
1588 | ||
c0129e2d | 1589 | else if (startswith (p, "V2_CSTR")) |
d764a8e6 IS |
1590 | return darwin_sections[objc_constant_string_object_section]; |
1591 | ||
1592 | return base; | |
1593 | } | |
1594 | ||
59ff4a1c EC |
1595 | section * |
1596 | machopic_select_section (tree decl, | |
1597 | int reloc, | |
1598 | unsigned HOST_WIDE_INT align) | |
1599 | { | |
794fa8a6 | 1600 | bool zsize, one, weak, use_coal, ro; |
f16d3f39 | 1601 | section *base_section = NULL; |
59ff4a1c | 1602 | |
46a99b06 IS |
1603 | weak = (DECL_P (decl) |
1604 | && DECL_WEAK (decl) | |
1605 | && !lookup_attribute ("weak_import", DECL_ATTRIBUTES (decl))); | |
1606 | ||
dfb25dfe IS |
1607 | /* Darwin pads zero-sized objects with at least one byte, so that the ld64 |
1608 | atom model is preserved (objects must have distinct regions starting with | |
1609 | a unique linker-visible symbol). | |
1610 | In order to support section anchors, we need to move objects with zero | |
1611 | size into sections which are marked as "no section anchors"; the padded | |
1612 | objects, obviously, have real sizes that differ from their DECL sizes. */ | |
1613 | zsize = DARWIN_SECTION_ANCHORS && flag_section_anchors; | |
1614 | ||
1615 | /* In the streaming of LTO symbol data, we might have a situation where the | |
1616 | var is incomplete or layout not finished (DECL_SIZE_UNIT is NULL_TREE). | |
1617 | We cannot tell if it is zero-sized then, but we can get the section | |
1618 | category correct so that nm reports the right kind of section | |
1619 | (e.g. BSS c.f. data). */ | |
1620 | zsize = (zsize | |
1621 | && DECL_P (decl) | |
a9e47ccf | 1622 | && (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == CONST_DECL) |
dfb25dfe | 1623 | && DECL_SIZE_UNIT (decl) |
ae7e9ddd | 1624 | && tree_to_uhwi (DECL_SIZE_UNIT (decl)) == 0); |
46a99b06 | 1625 | |
794fa8a6 | 1626 | one = DECL_P (decl) |
a9e47ccf | 1627 | && TREE_CODE (decl) == VAR_DECL |
cf288ed3 | 1628 | && DECL_COMDAT_GROUP (decl); |
46a99b06 | 1629 | |
794fa8a6 IS |
1630 | use_coal = (weak || one) && ld_uses_coal_sects; |
1631 | ||
46a99b06 IS |
1632 | ro = TREE_READONLY (decl) || TREE_CONSTANT (decl) ; |
1633 | ||
4f648002 | 1634 | switch (categorize_decl_for_section (decl, reloc)) |
59ff4a1c EC |
1635 | { |
1636 | case SECCAT_TEXT: | |
1f81953b | 1637 | gcc_unreachable (); |
59ff4a1c EC |
1638 | break; |
1639 | ||
1640 | case SECCAT_RODATA: | |
1641 | case SECCAT_SRODATA: | |
d56cbcc0 | 1642 | base_section = darwin_rodata_section (use_coal, zsize, reloc); |
59ff4a1c EC |
1643 | break; |
1644 | ||
1645 | case SECCAT_RODATA_MERGE_STR: | |
1646 | base_section = darwin_mergeable_string_section (decl, align); | |
1647 | break; | |
1648 | ||
1649 | case SECCAT_RODATA_MERGE_STR_INIT: | |
1650 | base_section = darwin_mergeable_string_section (DECL_INITIAL (decl), align); | |
1651 | break; | |
1652 | ||
1653 | case SECCAT_RODATA_MERGE_CONST: | |
46a99b06 | 1654 | base_section = darwin_mergeable_constant_section (decl, align, zsize); |
59ff4a1c EC |
1655 | break; |
1656 | ||
1657 | case SECCAT_DATA: | |
1658 | case SECCAT_DATA_REL: | |
1659 | case SECCAT_DATA_REL_LOCAL: | |
1660 | case SECCAT_DATA_REL_RO: | |
1661 | case SECCAT_DATA_REL_RO_LOCAL: | |
1662 | case SECCAT_SDATA: | |
1663 | case SECCAT_TDATA: | |
794fa8a6 | 1664 | if (use_coal) |
46a99b06 IS |
1665 | { |
1666 | if (ro) | |
1667 | base_section = darwin_sections[const_data_coal_section]; | |
a9e47ccf | 1668 | else |
46a99b06 IS |
1669 | base_section = darwin_sections[data_coal_section]; |
1670 | } | |
dfb25dfe | 1671 | else if (zsize) |
46a99b06 IS |
1672 | { |
1673 | /* If we're doing section anchors, then punt zero-sized objects into | |
1674 | their own sections so that they don't interfere with offset | |
dfb25dfe | 1675 | computation for the remaining vars. */ |
46a99b06 IS |
1676 | if (ro) |
1677 | base_section = darwin_sections[zobj_const_data_section]; | |
1678 | else | |
1679 | base_section = darwin_sections[zobj_data_section]; | |
1680 | } | |
1681 | else if (ro) | |
1682 | base_section = darwin_sections[const_data_section]; | |
1683 | else | |
1684 | base_section = data_section; | |
1685 | break; | |
59ff4a1c EC |
1686 | case SECCAT_BSS: |
1687 | case SECCAT_SBSS: | |
1688 | case SECCAT_TBSS: | |
794fa8a6 | 1689 | if (use_coal) |
46a99b06 | 1690 | base_section = darwin_sections[data_coal_section]; |
ae46c4e0 | 1691 | else |
46a99b06 IS |
1692 | { |
1693 | if (!TREE_PUBLIC (decl)) | |
1694 | base_section = lcomm_section; | |
1695 | else if (bss_noswitch_section) | |
1696 | base_section = bss_noswitch_section; | |
1697 | else | |
1698 | base_section = data_section; | |
1699 | } | |
59ff4a1c EC |
1700 | break; |
1701 | ||
1702 | default: | |
1703 | gcc_unreachable (); | |
ae46c4e0 | 1704 | } |
59ff4a1c | 1705 | |
a9e47ccf | 1706 | /* Darwin weird special cases. |
d764a8e6 | 1707 | a) OBJC Meta-data. */ |
a9e47ccf IS |
1708 | if (DECL_P (decl) |
1709 | && (TREE_CODE (decl) == VAR_DECL | |
d764a8e6 IS |
1710 | || TREE_CODE (decl) == CONST_DECL) |
1711 | && DECL_ATTRIBUTES (decl)) | |
1712 | { | |
1713 | tree meta = lookup_attribute ("OBJC2META", DECL_ATTRIBUTES (decl)); | |
1714 | if (meta) | |
1715 | return darwin_objc2_section (decl, meta, base_section); | |
1716 | meta = lookup_attribute ("OBJC1META", DECL_ATTRIBUTES (decl)); | |
1717 | if (meta) | |
1718 | return darwin_objc1_section (decl, meta, base_section); | |
1719 | meta = lookup_attribute ("OBJC1METG", DECL_ATTRIBUTES (decl)); | |
1720 | if (meta) | |
1721 | return base_section; /* GNU runtime is happy with it all in one pot. */ | |
1722 | } | |
1723 | ||
1724 | /* b) Constant string objects. */ | |
59ff4a1c EC |
1725 | if (TREE_CODE (decl) == CONSTRUCTOR |
1726 | && TREE_TYPE (decl) | |
1727 | && TREE_CODE (TREE_TYPE (decl)) == RECORD_TYPE | |
1728 | && TYPE_NAME (TREE_TYPE (decl))) | |
ae46c4e0 | 1729 | { |
59ff4a1c | 1730 | tree name = TYPE_NAME (TREE_TYPE (decl)); |
ae46c4e0 | 1731 | if (TREE_CODE (name) == TYPE_DECL) |
59ff4a1c | 1732 | name = DECL_NAME (name); |
c64de75f ZL |
1733 | |
1734 | if (!strcmp (IDENTIFIER_POINTER (name), "__builtin_ObjCString")) | |
d764a8e6 IS |
1735 | { |
1736 | if (flag_next_runtime) | |
1737 | { | |
1738 | if (flag_objc_abi == 2) | |
1739 | return darwin_sections[objc2_constant_string_object_section]; | |
1740 | else | |
1741 | return darwin_sections[objc_constant_string_object_section]; | |
1742 | } | |
1743 | else | |
1744 | return darwin_sections[objc_string_object_section]; | |
1745 | } | |
26705988 IS |
1746 | else if (!strcmp (IDENTIFIER_POINTER (name), "__builtin_CFString")) |
1747 | return darwin_sections[cfstring_constant_object_section]; | |
ae46c4e0 | 1748 | else |
d764a8e6 | 1749 | return base_section; |
ae46c4e0 | 1750 | } |
e86fc0d7 IS |
1751 | else if (flag_next_runtime |
1752 | && VAR_P (decl) | |
59ff4a1c EC |
1753 | && DECL_NAME (decl) |
1754 | && TREE_CODE (DECL_NAME (decl)) == IDENTIFIER_NODE | |
1755 | && IDENTIFIER_POINTER (DECL_NAME (decl)) | |
c0129e2d | 1756 | && startswith (IDENTIFIER_POINTER (DECL_NAME (decl)), "_OBJC_")) |
e86fc0d7 IS |
1757 | /* c) legacy meta-data selection was deprecated at 4.6, removed now. */ |
1758 | gcc_unreachable (); | |
59ff4a1c EC |
1759 | |
1760 | return base_section; | |
ae46c4e0 RH |
1761 | } |
1762 | ||
b64a1b53 | 1763 | /* This can be called with address expressions as "rtx". |
991b6592 | 1764 | They must go in "const". */ |
b64a1b53 | 1765 | |
d6b5193b | 1766 | section * |
ef4bddc2 | 1767 | machopic_select_rtx_section (machine_mode mode, rtx x, |
9c808aad | 1768 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) |
b64a1b53 | 1769 | { |
7ddee9cd | 1770 | if (known_eq (GET_MODE_SIZE (mode), 8) |
b79d4265 | 1771 | && (GET_CODE (x) == CONST_INT |
807e902e | 1772 | || GET_CODE (x) == CONST_WIDE_INT |
b79d4265 | 1773 | || GET_CODE (x) == CONST_DOUBLE)) |
56c779bc | 1774 | return darwin_sections[literal8_section]; |
7ddee9cd | 1775 | else if (known_eq (GET_MODE_SIZE (mode), 4) |
b64a1b53 | 1776 | && (GET_CODE (x) == CONST_INT |
807e902e | 1777 | || GET_CODE (x) == CONST_WIDE_INT |
b64a1b53 | 1778 | || GET_CODE (x) == CONST_DOUBLE)) |
56c779bc | 1779 | return darwin_sections[literal4_section]; |
5708d18d MS |
1780 | else if (HAVE_GAS_LITERAL16 |
1781 | && TARGET_64BIT | |
7ddee9cd | 1782 | && known_eq (GET_MODE_SIZE (mode), 16) |
f7288899 | 1783 | && (GET_CODE (x) == CONST_INT |
807e902e | 1784 | || GET_CODE (x) == CONST_WIDE_INT |
ca6f2eef EC |
1785 | || GET_CODE (x) == CONST_DOUBLE |
1786 | || GET_CODE (x) == CONST_VECTOR)) | |
f7288899 | 1787 | return darwin_sections[literal16_section]; |
86b0a4f3 | 1788 | else if (MACHOPIC_INDIRECT |
2e53734e GK |
1789 | && (GET_CODE (x) == SYMBOL_REF |
1790 | || GET_CODE (x) == CONST | |
1791 | || GET_CODE (x) == LABEL_REF)) | |
56c779bc | 1792 | return darwin_sections[const_data_section]; |
b64a1b53 | 1793 | else |
56c779bc | 1794 | return darwin_sections[const_section]; |
b64a1b53 RH |
1795 | } |
1796 | ||
2cc07db4 | 1797 | void |
9c808aad | 1798 | machopic_asm_out_constructor (rtx symbol, int priority ATTRIBUTE_UNUSED) |
2cc07db4 | 1799 | { |
6a52ccb3 | 1800 | cdtor_record new_elt = {symbol, priority, vec_safe_length (ctors)}; |
ae526fe5 AP |
1801 | |
1802 | vec_safe_push (ctors, new_elt); | |
1803 | ||
1804 | if (! MACHOPIC_INDIRECT) | |
1805 | fprintf (asm_out_file, ".reference .constructors_used\n"); | |
1806 | } | |
1807 | ||
6a52ccb3 AP |
1808 | void |
1809 | machopic_asm_out_destructor (rtx symbol, int priority ATTRIBUTE_UNUSED) | |
1810 | { | |
1811 | cdtor_record new_elt = {symbol, priority, vec_safe_length (dtors)}; | |
1812 | ||
1813 | vec_safe_push (dtors, new_elt); | |
1814 | ||
1815 | if (! MACHOPIC_INDIRECT) | |
1816 | fprintf (asm_out_file, ".reference .destructors_used\n"); | |
1817 | } | |
1818 | ||
ae526fe5 | 1819 | static int |
6a52ccb3 | 1820 | sort_cdtor_records (const void * a, const void * b) |
ae526fe5 | 1821 | { |
6a52ccb3 AP |
1822 | const cdtor_record *cda = (const cdtor_record *)a; |
1823 | const cdtor_record *cdb = (const cdtor_record *)b; | |
1824 | if (cda->priority > cdb->priority) | |
ae526fe5 | 1825 | return 1; |
6a52ccb3 | 1826 | if (cda->priority < cdb->priority) |
ae526fe5 | 1827 | return -1; |
6a52ccb3 | 1828 | if (cda->position > cdb->position) |
ae526fe5 | 1829 | return 1; |
6a52ccb3 | 1830 | if (cda->position < cdb->position) |
ae526fe5 AP |
1831 | return -1; |
1832 | return 0; | |
1833 | } | |
1834 | ||
a9e47ccf | 1835 | static void |
6a52ccb3 | 1836 | finalize_ctors () |
ae526fe5 AP |
1837 | { |
1838 | unsigned int i; | |
6a52ccb3 | 1839 | cdtor_record *elt; |
a9e47ccf | 1840 | |
ab82a49f | 1841 | if (MACHOPIC_INDIRECT) |
56c779bc | 1842 | switch_to_section (darwin_sections[mod_init_section]); |
2cc07db4 | 1843 | else |
56c779bc | 1844 | switch_to_section (darwin_sections[constructor_section]); |
2cc07db4 | 1845 | |
66526c6a IS |
1846 | /* Where needed, provide a linker-visible section-start symbol so that we |
1847 | have stable output between debug and non-debug. */ | |
1848 | if (ld_init_term_start_labels) | |
1849 | fputs (MACHOPIC_INDIRECT ? "_Mod.init:\n" : "_CTOR.sect:\n", asm_out_file); | |
1850 | ||
ae526fe5 | 1851 | if (vec_safe_length (ctors) > 1) |
6a52ccb3 | 1852 | ctors->qsort (sort_cdtor_records); |
ae526fe5 AP |
1853 | FOR_EACH_VEC_SAFE_ELT (ctors, i, elt) |
1854 | { | |
1855 | assemble_align (POINTER_SIZE); | |
1856 | assemble_integer (elt->symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
1857 | } | |
2cc07db4 RH |
1858 | } |
1859 | ||
6a52ccb3 AP |
1860 | static void |
1861 | finalize_dtors () | |
2cc07db4 | 1862 | { |
6a52ccb3 AP |
1863 | unsigned int i; |
1864 | cdtor_record *elt; | |
1865 | ||
ab82a49f | 1866 | if (MACHOPIC_INDIRECT) |
56c779bc | 1867 | switch_to_section (darwin_sections[mod_term_section]); |
2cc07db4 | 1868 | else |
56c779bc | 1869 | switch_to_section (darwin_sections[destructor_section]); |
2cc07db4 | 1870 | |
66526c6a IS |
1871 | /* Where needed, provide a linker-visible section-start symbol so that we |
1872 | have stable output between debug and non-debug. */ | |
1873 | if (ld_init_term_start_labels) | |
1874 | fputs (MACHOPIC_INDIRECT ? "_Mod.term:\n" : "_DTOR.sect:\n", asm_out_file); | |
1875 | ||
6a52ccb3 AP |
1876 | if (vec_safe_length (dtors) > 1) |
1877 | dtors->qsort (sort_cdtor_records); | |
1878 | FOR_EACH_VEC_SAFE_ELT (dtors, i, elt) | |
1879 | { | |
1880 | assemble_align (POINTER_SIZE); | |
1881 | assemble_integer (elt->symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
1882 | } | |
2cc07db4 | 1883 | } |
e2500fed | 1884 | |
5eb99654 | 1885 | void |
9c808aad | 1886 | darwin_globalize_label (FILE *stream, const char *name) |
5eb99654 | 1887 | { |
c0129e2d | 1888 | if (!startswith (name, "_OBJC_")) |
5eb99654 | 1889 | default_globalize_label (stream, name); |
8703bf5d IS |
1890 | /* We have some Objective C cases that need to be global, but only on newer |
1891 | OS versions. */ | |
1892 | if (flag_objc_abi < 2 || flag_next_runtime < 100700) | |
1893 | return; | |
c0129e2d | 1894 | if (startswith (name+6, "LabelPro")) |
336fdc8b | 1895 | default_globalize_label (stream, name); |
c0129e2d | 1896 | if (startswith (name+6, "Protocol_")) |
336fdc8b | 1897 | default_globalize_label (stream, name); |
5eb99654 KG |
1898 | } |
1899 | ||
a9e47ccf IS |
1900 | /* This routine returns non-zero if 'name' starts with the special objective-c |
1901 | anonymous file-scope static name. It accommodates c++'s mangling of such | |
d8299715 | 1902 | symbols (in this case the symbols will have form _ZL{d}*_OBJC_* d=digit). */ |
a9e47ccf IS |
1903 | |
1904 | int | |
d8299715 DK |
1905 | darwin_label_is_anonymous_local_objc_name (const char *name) |
1906 | { | |
1907 | const unsigned char *p = (const unsigned char *) name; | |
1908 | if (*p != '_') | |
1909 | return 0; | |
1910 | if (p[1] == 'Z' && p[2] == 'L') | |
1911 | { | |
1912 | p += 3; | |
1913 | while (*p >= '0' && *p <= '9') | |
1914 | p++; | |
1915 | } | |
c0129e2d | 1916 | if (!startswith ((const char *)p, "_OBJC_")) |
336fdc8b | 1917 | return false; |
8703bf5d | 1918 | |
336fdc8b | 1919 | /* We need some of the objective c meta-data symbols to be visible to the |
8703bf5d IS |
1920 | linker (when the target OS version is newer). FIXME: this is horrible, |
1921 | we need a better mechanism. */ | |
1922 | ||
1923 | if (flag_objc_abi < 2 || flag_next_runtime < 100700) | |
1924 | return true; | |
1925 | ||
336fdc8b | 1926 | p += 6; |
c0129e2d | 1927 | if (startswith ((const char *)p, "ClassRef")) |
336fdc8b | 1928 | return false; |
c0129e2d | 1929 | else if (startswith ((const char *)p, "SelRef")) |
336fdc8b | 1930 | return false; |
c0129e2d | 1931 | else if (startswith ((const char *)p, "Category")) |
336fdc8b IS |
1932 | { |
1933 | if (p[8] == '_' || p[8] == 'I' || p[8] == 'P' || p[8] == 'C' ) | |
1934 | return false; | |
1935 | return true; | |
1936 | } | |
c0129e2d | 1937 | else if (startswith ((const char *)p, "ClassMethods")) |
336fdc8b | 1938 | return false; |
c0129e2d | 1939 | else if (startswith ((const char *)p, "Instance")) |
336fdc8b IS |
1940 | { |
1941 | if (p[8] == 'I' || p[8] == 'M') | |
1942 | return false; | |
1943 | return true; | |
1944 | } | |
c0129e2d | 1945 | else if (startswith ((const char *)p, "CLASS_RO")) |
336fdc8b | 1946 | return false; |
c0129e2d | 1947 | else if (startswith ((const char *)p, "METACLASS_RO")) |
336fdc8b | 1948 | return false; |
c0129e2d | 1949 | else if (startswith ((const char *)p, "Protocol")) |
336fdc8b IS |
1950 | { |
1951 | if (p[8] == '_' || p[8] == 'I' || p[8] == 'P' | |
1952 | || p[8] == 'M' || p[8] == 'C' || p[8] == 'O') | |
1953 | return false; | |
1954 | return true; | |
1955 | } | |
c0129e2d | 1956 | else if (startswith ((const char *)p, "LabelPro")) |
336fdc8b IS |
1957 | return false; |
1958 | return true; | |
d8299715 DK |
1959 | } |
1960 | ||
b20577ea | 1961 | /* LTO support for Mach-O. |
c082f9f3 | 1962 | |
b20577ea IS |
1963 | This version uses three mach-o sections to encapsulate the (unlimited |
1964 | number of) lto sections. | |
c082f9f3 | 1965 | |
b20577ea IS |
1966 | __GNU_LTO, __lto_sections contains the concatented GNU LTO section data. |
1967 | __GNU_LTO, __section_names contains the GNU LTO section names. | |
1968 | __GNU_LTO, __section_index contains an array of values that index these. | |
c082f9f3 | 1969 | |
b20577ea IS |
1970 | Indexed thus: |
1971 | <section offset from the start of __GNU_LTO, __lto_sections>, | |
1972 | <section length> | |
1973 | <name offset from the start of __GNU_LTO, __section_names, | |
1974 | <name length>. | |
1975 | ||
1976 | At present, for both m32 and m64 mach-o files each of these fields is | |
1977 | represented by a uint32_t. This is because, AFAICT, a mach-o object | |
1978 | cannot exceed 4Gb because the section_64 offset field (see below) is 32bits. | |
1979 | ||
1980 | uint32_t offset; | |
1981 | "offset An integer specifying the offset to this section in the file." */ | |
1982 | ||
1983 | /* Count lto section numbers. */ | |
1984 | static unsigned int lto_section_num = 0; | |
1985 | ||
1986 | /* A vector of information about LTO sections, at present, we only have | |
1987 | the name. TODO: see if we can get the data length somehow. */ | |
1988 | typedef struct GTY (()) darwin_lto_section_e { | |
1989 | const char *sectname; | |
1990 | } darwin_lto_section_e ; | |
b20577ea | 1991 | |
9771b263 | 1992 | static GTY (()) vec<darwin_lto_section_e, va_gc> *lto_section_names; |
b20577ea | 1993 | |
b20577ea IS |
1994 | /* Section wrapper scheme (used here to wrap the unlimited number of LTO |
1995 | sections into three Mach-O ones). | |
1996 | NOTE: These names MUST be kept in sync with those in | |
1997 | libiberty/simple-object-mach-o. */ | |
1998 | #define LTO_SECTS_SECTION "__wrapper_sects" | |
1999 | #define LTO_NAMES_SECTION "__wrapper_names" | |
2000 | #define LTO_INDEX_SECTION "__wrapper_index" | |
c082f9f3 SB |
2001 | |
2002 | /* File to temporarily store LTO data. This is appended to asm_out_file | |
2003 | in darwin_end_file. */ | |
2004 | static FILE *lto_asm_out_file, *saved_asm_out_file; | |
2005 | static char *lto_asm_out_name; | |
2ebb413b | 2006 | static enum debug_info_levels saved_debug_info_level; |
c082f9f3 SB |
2007 | |
2008 | /* Prepare asm_out_file for LTO output. For darwin, this means hiding | |
2009 | asm_out_file and switching to an alternative output file. */ | |
2010 | void | |
2011 | darwin_asm_lto_start (void) | |
2012 | { | |
2013 | gcc_assert (! saved_asm_out_file); | |
2014 | saved_asm_out_file = asm_out_file; | |
2ebb413b RB |
2015 | saved_debug_info_level = debug_info_level; |
2016 | debug_info_level = DINFO_LEVEL_NONE; | |
c082f9f3 SB |
2017 | if (! lto_asm_out_name) |
2018 | lto_asm_out_name = make_temp_file (".lto.s"); | |
2019 | lto_asm_out_file = fopen (lto_asm_out_name, "a"); | |
2020 | if (lto_asm_out_file == NULL) | |
40fecdd6 JM |
2021 | fatal_error (input_location, |
2022 | "failed to open temporary file %s for LTO output", | |
c082f9f3 SB |
2023 | lto_asm_out_name); |
2024 | asm_out_file = lto_asm_out_file; | |
2025 | } | |
2026 | ||
2027 | /* Restore asm_out_file. */ | |
2028 | void | |
2029 | darwin_asm_lto_end (void) | |
2030 | { | |
2031 | gcc_assert (saved_asm_out_file); | |
2032 | fclose (lto_asm_out_file); | |
2033 | asm_out_file = saved_asm_out_file; | |
2034 | saved_asm_out_file = NULL; | |
2ebb413b | 2035 | debug_info_level = saved_debug_info_level; |
c082f9f3 SB |
2036 | } |
2037 | ||
de4df14c | 2038 | static void |
1ea85365 RB |
2039 | darwin_asm_dwarf_section (const char *name, unsigned int flags, |
2040 | tree decl, bool is_for_lto); | |
de4df14c IS |
2041 | |
2042 | /* Called for the TARGET_ASM_NAMED_SECTION hook. */ | |
2043 | ||
4746cf84 | 2044 | void |
083cad55 | 2045 | darwin_asm_named_section (const char *name, |
c082f9f3 | 2046 | unsigned int flags, |
c18a5b6c | 2047 | tree decl ATTRIBUTE_UNUSED) |
4746cf84 | 2048 | { |
b20577ea IS |
2049 | /* LTO sections go in a special section that encapsulates the (unlimited) |
2050 | number of GNU LTO sections within a single mach-o one. */ | |
c0129e2d | 2051 | if (startswith (name, LTO_SECTION_NAME_PREFIX)) |
c082f9f3 | 2052 | { |
b20577ea | 2053 | darwin_lto_section_e e; |
c082f9f3 SB |
2054 | /* We expect certain flags to be set... */ |
2055 | gcc_assert ((flags & (SECTION_DEBUG | SECTION_NAMED)) | |
2056 | == (SECTION_DEBUG | SECTION_NAMED)); | |
2057 | ||
b20577ea IS |
2058 | /* Switch to our combined section. */ |
2059 | fprintf (asm_out_file, "\t.section %s,%s,regular,debug\n", | |
2060 | LTO_SEGMENT_NAME, LTO_SECTS_SECTION); | |
2061 | /* Output a label for the start of this sub-section. */ | |
2062 | fprintf (asm_out_file, "L_GNU_LTO%d:\t;# %s\n", | |
2063 | lto_section_num, name); | |
2064 | /* We have to jump through hoops to get the values of the intra-section | |
2065 | offsets... */ | |
2066 | fprintf (asm_out_file, "\t.set L$gnu$lto$offs%d,L_GNU_LTO%d-L_GNU_LTO0\n", | |
2067 | lto_section_num, lto_section_num); | |
2068 | fprintf (asm_out_file, | |
2069 | "\t.set L$gnu$lto$size%d,L_GNU_LTO%d-L_GNU_LTO%d\n", | |
2070 | lto_section_num, lto_section_num+1, lto_section_num); | |
2071 | lto_section_num++; | |
2072 | e.sectname = xstrdup (name); | |
2073 | /* Keep the names, we'll need to make a table later. | |
2074 | TODO: check that we do not revisit sections, that would break | |
2075 | the assumption of how this is done. */ | |
2076 | if (lto_section_names == NULL) | |
9771b263 DN |
2077 | vec_alloc (lto_section_names, 16); |
2078 | vec_safe_push (lto_section_names, e); | |
b20577ea | 2079 | } |
c0129e2d | 2080 | else if (startswith (name, "__DWARF,")) |
1ea85365 | 2081 | darwin_asm_dwarf_section (name, flags, decl, false); |
c0129e2d | 2082 | else if (startswith (name, "__GNU_DWARF_LTO,")) |
1ea85365 | 2083 | darwin_asm_dwarf_section (name, flags, decl, true); |
c082f9f3 SB |
2084 | else |
2085 | fprintf (asm_out_file, "\t.section %s\n", name); | |
4746cf84 MA |
2086 | } |
2087 | ||
083cad55 | 2088 | void |
f1a66265 | 2089 | darwin_unique_section (tree decl ATTRIBUTE_UNUSED, int reloc ATTRIBUTE_UNUSED) |
4746cf84 | 2090 | { |
f1a66265 | 2091 | /* Darwin does not use unique sections. */ |
4746cf84 MA |
2092 | } |
2093 | ||
f475fd3c MS |
2094 | /* Handle __attribute__ ((apple_kext_compatibility)). |
2095 | This only applies to darwin kexts for 2.95 compatibility -- it shrinks the | |
2096 | vtable for classes with this attribute (and their descendants) by not | |
2097 | outputting the new 3.0 nondeleting destructor. This means that such | |
2098 | objects CANNOT be allocated on the stack or as globals UNLESS they have | |
2099 | a completely empty `operator delete'. | |
2100 | Luckily, this fits in with the Darwin kext model. | |
2101 | ||
2102 | This attribute also disables gcc3's potential overlaying of derived | |
2103 | class data members on the padding at the end of the base class. */ | |
2104 | ||
2105 | tree | |
2106 | darwin_handle_kext_attribute (tree *node, tree name, | |
2107 | tree args ATTRIBUTE_UNUSED, | |
2108 | int flags ATTRIBUTE_UNUSED, | |
2109 | bool *no_add_attrs) | |
2110 | { | |
2111 | /* APPLE KEXT stuff -- only applies with pure static C++ code. */ | |
2112 | if (! TARGET_KEXTABI) | |
2113 | { | |
29d08eba JM |
2114 | warning (0, "%qE 2.95 vtable-compatibility attribute applies " |
2115 | "only when compiling a kext", name); | |
f475fd3c MS |
2116 | |
2117 | *no_add_attrs = true; | |
2118 | } | |
2119 | else if (TREE_CODE (*node) != RECORD_TYPE) | |
2120 | { | |
29d08eba JM |
2121 | warning (0, "%qE 2.95 vtable-compatibility attribute applies " |
2122 | "only to C++ classes", name); | |
f475fd3c MS |
2123 | |
2124 | *no_add_attrs = true; | |
2125 | } | |
2126 | ||
2127 | return NULL_TREE; | |
2128 | } | |
2129 | ||
005c1a13 GK |
2130 | /* Handle a "weak_import" attribute; arguments as in |
2131 | struct attribute_spec.handler. */ | |
2132 | ||
2133 | tree | |
2134 | darwin_handle_weak_import_attribute (tree *node, tree name, | |
2135 | tree ARG_UNUSED (args), | |
2136 | int ARG_UNUSED (flags), | |
2137 | bool * no_add_attrs) | |
2138 | { | |
d7001ae5 | 2139 | if (TREE_CODE (*node) != FUNCTION_DECL && TREE_CODE (*node) != VAR_DECL) |
005c1a13 | 2140 | { |
29d08eba JM |
2141 | warning (OPT_Wattributes, "%qE attribute ignored", |
2142 | name); | |
005c1a13 GK |
2143 | *no_add_attrs = true; |
2144 | } | |
2145 | else | |
2146 | declare_weak (*node); | |
2147 | ||
2148 | return NULL_TREE; | |
2149 | } | |
45cc4783 | 2150 | |
083cad55 | 2151 | /* Emit a label for an FDE, making it global and/or weak if appropriate. |
eeab4d81 MS |
2152 | The third parameter is nonzero if this is for exception handling. |
2153 | The fourth parameter is nonzero if this is just a placeholder for an | |
4746cf84 | 2154 | FDE that we are omitting. */ |
eeab4d81 | 2155 | |
083cad55 | 2156 | void |
eeab4d81 | 2157 | darwin_emit_unwind_label (FILE *file, tree decl, int for_eh, int empty) |
4746cf84 | 2158 | { |
1f81953b IS |
2159 | char *lab ; |
2160 | char buf[32]; | |
2161 | static int invok_count = 0; | |
2162 | static tree last_fun_decl = NULL_TREE; | |
a9e47ccf | 2163 | |
dbe89f49 IS |
2164 | /* Modern linkers can produce distinct FDEs without compiler support. */ |
2165 | if (! for_eh || ! ld_needs_eh_markers) | |
192d0f89 | 2166 | return; |
4746cf84 | 2167 | |
a9e47ccf | 2168 | /* FIXME: This only works when the eh for all sections of a function are |
1f81953b IS |
2169 | emitted at the same time. If that changes, we would need to use a lookup |
2170 | table of some form to determine what to do. Also, we should emit the | |
2171 | unadorned label for the partition containing the public label for a | |
2172 | function. This is of limited use, probably, since we do not currently | |
2173 | enable partitioning. */ | |
2174 | strcpy (buf, ".eh"); | |
a9e47ccf | 2175 | if (decl && TREE_CODE (decl) == FUNCTION_DECL) |
1f81953b IS |
2176 | { |
2177 | if (decl == last_fun_decl) | |
2178 | { | |
2179 | invok_count++; | |
2180 | snprintf (buf, 31, "$$part$$%d.eh", invok_count); | |
2181 | } | |
2182 | else | |
2183 | { | |
2184 | last_fun_decl = decl; | |
2185 | invok_count = 0; | |
2186 | } | |
2187 | } | |
2188 | ||
2189 | lab = concat (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)), buf, NULL); | |
4746cf84 MA |
2190 | |
2191 | if (TREE_PUBLIC (decl)) | |
c3b07ec2 GK |
2192 | { |
2193 | targetm.asm_out.globalize_label (file, lab); | |
2194 | if (DECL_VISIBILITY (decl) == VISIBILITY_HIDDEN) | |
2195 | { | |
2196 | fputs ("\t.private_extern ", file); | |
2197 | assemble_name (file, lab); | |
2198 | fputc ('\n', file); | |
2199 | } | |
2200 | } | |
4746cf84 | 2201 | |
f1a66265 | 2202 | if (DECL_WEAK (decl)) |
c3b07ec2 GK |
2203 | { |
2204 | fputs ("\t.weak_definition ", file); | |
2205 | assemble_name (file, lab); | |
2206 | fputc ('\n', file); | |
2207 | } | |
4746cf84 | 2208 | |
c3b07ec2 | 2209 | assemble_name (file, lab); |
4746cf84 | 2210 | if (empty) |
45cc4783 | 2211 | { |
c3b07ec2 | 2212 | fputs (" = 0\n", file); |
45cc4783 MS |
2213 | |
2214 | /* Mark the absolute .eh and .eh1 style labels as needed to | |
2215 | ensure that we don't dead code strip them and keep such | |
2216 | labels from another instantiation point until we can fix this | |
2217 | properly with group comdat support. */ | |
c3b07ec2 | 2218 | darwin_mark_decl_preserved (lab); |
45cc4783 | 2219 | } |
4746cf84 | 2220 | else |
c3b07ec2 | 2221 | fputs (":\n", file); |
4746cf84 MA |
2222 | |
2223 | free (lab); | |
2224 | } | |
2225 | ||
083cad55 EC |
2226 | static GTY(()) unsigned long except_table_label_num; |
2227 | ||
2228 | void | |
2229 | darwin_emit_except_table_label (FILE *file) | |
2230 | { | |
2231 | char section_start_label[30]; | |
2232 | ||
2233 | ASM_GENERATE_INTERNAL_LABEL (section_start_label, "GCC_except_table", | |
2234 | except_table_label_num++); | |
2235 | ASM_OUTPUT_LABEL (file, section_start_label); | |
2236 | } | |
95cc59f1 | 2237 | |
5d46ec3d IS |
2238 | rtx |
2239 | darwin_make_eh_symbol_indirect (rtx orig, bool ARG_UNUSED (pubvis)) | |
2240 | { | |
2241 | if (DARWIN_PPC == 0 && TARGET_64BIT) | |
2242 | return orig; | |
2243 | ||
2244 | return gen_rtx_SYMBOL_REF (Pmode, | |
2245 | machopic_indirection_name (orig, | |
2246 | /*stub_p=*/false)); | |
2247 | } | |
2248 | ||
491d5b3c IS |
2249 | /* The unwinders in earlier Darwin versions are based on an old version |
2250 | of libgcc_s and need current frame address stateto be reset after a | |
2251 | DW_CFA_restore_state recovers the register values. */ | |
2252 | ||
2253 | bool | |
2254 | darwin_should_restore_cfa_state (void) | |
2255 | { | |
2256 | return generating_for_darwin_version <= 10; | |
2257 | } | |
2258 | ||
95cc59f1 IS |
2259 | /* Return, and mark as used, the name of the stub for the mcount function. |
2260 | Currently, this is only called by X86 code in the expansion of the | |
2261 | FUNCTION_PROFILER macro, when stubs are enabled. */ | |
2262 | ||
2263 | const char* | |
2264 | machopic_mcount_stub_name (void) | |
2265 | { | |
2266 | rtx symbol = gen_rtx_SYMBOL_REF (Pmode, "*mcount"); | |
2267 | const char *name = machopic_indirection_name (symbol, /*stub_p=*/true); | |
2268 | machopic_validate_stub_or_non_lazy_ptr (name); | |
2269 | return name; | |
2270 | } | |
2271 | ||
083cad55 | 2272 | /* Generate a PC-relative reference to a Mach-O non-lazy-symbol. */ |
eeab4d81 | 2273 | |
4746cf84 MA |
2274 | void |
2275 | darwin_non_lazy_pcrel (FILE *file, rtx addr) | |
2276 | { | |
4746cf84 MA |
2277 | const char *nlp_name; |
2278 | ||
992d08b1 | 2279 | gcc_assert (GET_CODE (addr) == SYMBOL_REF); |
4746cf84 | 2280 | |
11abc112 | 2281 | nlp_name = machopic_indirection_name (addr, /*stub_p=*/false); |
4746cf84 MA |
2282 | fputs ("\t.long\t", file); |
2283 | ASM_OUTPUT_LABELREF (file, nlp_name); | |
2284 | fputs ("-.", file); | |
2285 | } | |
2286 | ||
46a99b06 IS |
2287 | /* If this is uncommented, details of each allocation will be printed |
2288 | in the asm right before the actual code. WARNING - this will cause some | |
2289 | test-suite fails (since the printout will contain items that some tests | |
2290 | are not expecting) -- so don't leave it on by default (it bloats the | |
2291 | asm too). */ | |
2292 | /*#define DEBUG_DARWIN_MEM_ALLOCATORS*/ | |
2293 | ||
2294 | /* The first two of these routines are ostensibly just intended to put | |
2295 | names into the asm. However, they are both hijacked in order to ensure | |
2296 | that zero-sized items do not make their way into the output. Consequently, | |
2297 | we also need to make these participate in provisions for dealing with | |
2298 | such items in section anchors. */ | |
2299 | ||
2300 | /* The implementation of ASM_DECLARE_OBJECT_NAME. */ | |
2301 | /* The RTTI data (e.g., __ti4name) is common and public (and static), | |
2302 | but it does need to be referenced via indirect PIC data pointers. | |
2303 | The machopic_define_symbol calls are telling the machopic subsystem | |
2304 | that the name *is* defined in this module, so it doesn't need to | |
2305 | make them indirect. */ | |
a9e47ccf IS |
2306 | void |
2307 | darwin_asm_declare_object_name (FILE *file, | |
46a99b06 IS |
2308 | const char *nam, tree decl) |
2309 | { | |
2310 | const char *xname = nam; | |
2311 | unsigned HOST_WIDE_INT size; | |
2312 | bool local_def, weak; | |
2313 | ||
2314 | weak = (DECL_P (decl) | |
2315 | && DECL_WEAK (decl) | |
a9e47ccf | 2316 | && !lookup_attribute ("weak_import", |
46a99b06 IS |
2317 | DECL_ATTRIBUTES (decl))); |
2318 | ||
a9e47ccf IS |
2319 | local_def = DECL_INITIAL (decl) || (TREE_STATIC (decl) |
2320 | && (!DECL_COMMON (decl) | |
46a99b06 IS |
2321 | || !TREE_PUBLIC (decl))); |
2322 | ||
2323 | if (GET_CODE (XEXP (DECL_RTL (decl), 0)) != SYMBOL_REF) | |
2324 | xname = IDENTIFIER_POINTER (DECL_NAME (decl)); | |
2325 | ||
2326 | if (local_def) | |
2327 | { | |
2328 | (* targetm.encode_section_info) (decl, DECL_RTL (decl), false); | |
2329 | if (!weak) | |
2330 | machopic_define_symbol (DECL_RTL (decl)); | |
2331 | } | |
2332 | ||
ae7e9ddd | 2333 | size = tree_to_uhwi (DECL_SIZE_UNIT (decl)); |
46a99b06 IS |
2334 | |
2335 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2336 | fprintf (file, "# dadon: %s %s (%llu, %u) local %d weak %d" | |
2337 | " stat %d com %d pub %d t-const %d t-ro %d init %lx\n", | |
a9e47ccf IS |
2338 | xname, (TREE_CODE (decl) == VAR_DECL?"var":"const"), |
2339 | (unsigned long long)size, DECL_ALIGN (decl), local_def, | |
46a99b06 IS |
2340 | DECL_WEAK (decl), TREE_STATIC (decl), DECL_COMMON (decl), |
2341 | TREE_PUBLIC (decl), TREE_CONSTANT (decl), TREE_READONLY (decl), | |
a9e47ccf | 2342 | (unsigned long)DECL_INITIAL (decl)); |
46a99b06 IS |
2343 | #endif |
2344 | ||
a9e47ccf | 2345 | /* Darwin needs help to support local zero-sized objects. |
46a99b06 IS |
2346 | They must be made at least one byte, and the section containing must be |
2347 | marked as unsuitable for section-anchors (see storage allocators below). | |
a9e47ccf | 2348 | |
46a99b06 IS |
2349 | For non-zero objects this output is handled by varasm.c. |
2350 | */ | |
2351 | if (!size) | |
2352 | { | |
2353 | unsigned int l2align = 0; | |
2354 | ||
7607219d | 2355 | /* The align must be honored, even for zero-sized. */ |
46a99b06 IS |
2356 | if (DECL_ALIGN (decl)) |
2357 | { | |
2358 | l2align = floor_log2 (DECL_ALIGN (decl) / BITS_PER_UNIT); | |
2359 | fprintf (file, "\t.align\t%u\n", l2align); | |
2360 | } | |
2361 | ||
2362 | ASM_OUTPUT_LABEL (file, xname); | |
2363 | size = 1; | |
16998094 | 2364 | fprintf (file, "\t.space\t" HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); |
46a99b06 IS |
2365 | |
2366 | /* Check that we've correctly picked up the zero-sized item and placed it | |
2367 | properly. */ | |
2368 | gcc_assert ((!DARWIN_SECTION_ANCHORS || !flag_section_anchors) | |
a9e47ccf | 2369 | || (in_section |
46a99b06 IS |
2370 | && (in_section->common.flags & SECTION_NO_ANCHOR))); |
2371 | } | |
2372 | else | |
2373 | ASM_OUTPUT_LABEL (file, xname); | |
2374 | } | |
e4f7c483 | 2375 | |
46a99b06 | 2376 | /* The implementation of ASM_DECLARE_CONSTANT_NAME. */ |
e4f7c483 AS |
2377 | void |
2378 | darwin_asm_declare_constant_name (FILE *file, const char *name, | |
2379 | const_tree exp ATTRIBUTE_UNUSED, | |
2380 | HOST_WIDE_INT size) | |
2381 | { | |
2382 | assemble_label (file, name); | |
46a99b06 IS |
2383 | /* As for other items, we need at least one byte. */ |
2384 | if (!size) | |
2385 | { | |
2386 | fputs ("\t.space\t1\n", file); | |
2387 | /* Check that we've correctly picked up the zero-sized item and placed it | |
2388 | properly. */ | |
2389 | gcc_assert ((!DARWIN_SECTION_ANCHORS || !flag_section_anchors) | |
a9e47ccf | 2390 | || (in_section |
46a99b06 IS |
2391 | && (in_section->common.flags & SECTION_NO_ANCHOR))); |
2392 | } | |
2393 | } | |
2394 | ||
2395 | /* Darwin storage allocators. | |
2396 | ||
2397 | Zerofill sections are desirable for large blank data since, otherwise, these | |
2398 | data bloat objects (PR33210). | |
2399 | ||
2400 | However, section anchors don't work in .zerofill sections (one cannot switch | |
2401 | to a zerofill section). Ergo, for Darwin targets using section anchors we need | |
2402 | to put (at least some) data into 'normal' switchable sections. | |
2403 | ||
2404 | Here we set a relatively arbitrary value for the size of an object to trigger | |
2405 | zerofill when section anchors are enabled (anything bigger than a page for | |
2406 | current Darwin implementations). FIXME: there ought to be some objective way | |
2407 | to make this choice. | |
2408 | ||
2409 | When section anchor are off this is ignored anyway. */ | |
2410 | ||
2411 | #define BYTES_ZFILL 4096 | |
2412 | ||
2413 | /* Emit a chunk of data for items coalesced by the linker. */ | |
2414 | static void | |
2415 | darwin_emit_weak_or_comdat (FILE *fp, tree decl, const char *name, | |
a9e47ccf | 2416 | unsigned HOST_WIDE_INT size, |
794fa8a6 | 2417 | bool use_coal, |
46a99b06 IS |
2418 | unsigned int align) |
2419 | { | |
794fa8a6 IS |
2420 | /* Since the sections used here are coalesced, they will not be eligible |
2421 | for section anchors, and therefore we don't need to break that out. | |
2422 | CHECKME: for modern linker on PowerPC. */ | |
46a99b06 | 2423 | if (TREE_READONLY (decl) || TREE_CONSTANT (decl)) |
794fa8a6 IS |
2424 | switch_to_section (use_coal ? darwin_sections[const_data_coal_section] |
2425 | : darwin_sections[const_data_section]); | |
46a99b06 | 2426 | else |
794fa8a6 IS |
2427 | switch_to_section (use_coal ? darwin_sections[data_coal_section] |
2428 | : data_section); | |
46a99b06 IS |
2429 | |
2430 | /* To be consistent, we'll allow darwin_asm_declare_object_name to assemble | |
2431 | the align info for zero-sized items... but do it here otherwise. */ | |
2432 | if (size && align) | |
2433 | fprintf (fp, "\t.align\t%d\n", floor_log2 (align / BITS_PER_UNIT)); | |
2434 | ||
2435 | if (TREE_PUBLIC (decl)) | |
2436 | darwin_globalize_label (fp, name); | |
2437 | ||
a9e47ccf | 2438 | /* ... and we let it deal with outputting one byte of zero for them too. */ |
46a99b06 IS |
2439 | darwin_asm_declare_object_name (fp, name, decl); |
2440 | if (size) | |
2441 | assemble_zeros (size); | |
2442 | } | |
2443 | ||
d764a8e6 IS |
2444 | /* Emit a chunk of data for ObjC meta-data that got placed in BSS erroneously. */ |
2445 | static void | |
2446 | darwin_emit_objc_zeroed (FILE *fp, tree decl, const char *name, | |
a9e47ccf | 2447 | unsigned HOST_WIDE_INT size, |
d764a8e6 IS |
2448 | unsigned int align, tree meta) |
2449 | { | |
2450 | section *ocs = data_section; | |
2451 | ||
2452 | if (TREE_PURPOSE (meta) == get_identifier("OBJC2META")) | |
2453 | ocs = darwin_objc2_section (decl, meta, ocs); | |
2454 | else | |
2455 | ocs = darwin_objc1_section (decl, meta, ocs); | |
2456 | ||
2457 | switch_to_section (ocs); | |
2458 | ||
2459 | /* We shall declare that zero-sized meta-data are not valid (yet). */ | |
2460 | gcc_assert (size); | |
2461 | fprintf (fp, "\t.align\t%d\n", floor_log2 (align / BITS_PER_UNIT)); | |
2462 | ||
a9e47ccf | 2463 | /* ... and we let it deal with outputting one byte of zero for them too. */ |
d764a8e6 IS |
2464 | darwin_asm_declare_object_name (fp, name, decl); |
2465 | assemble_zeros (size); | |
2466 | } | |
2467 | ||
46a99b06 IS |
2468 | /* This routine emits 'local' storage: |
2469 | ||
a9e47ccf | 2470 | When Section Anchors are off this routine emits .zerofill commands in |
46a99b06 IS |
2471 | sections named for their alignment. |
2472 | ||
2473 | When Section Anchors are on, smaller (non-zero-sized) items are placed in | |
2474 | the .static_data section so that the section anchoring system can see them. | |
2475 | Larger items are still placed in .zerofill sections, addressing PR33210. | |
2476 | The routine has no checking - it is all assumed to be done by the caller. | |
2477 | */ | |
2478 | static void | |
a9e47ccf IS |
2479 | darwin_emit_local_bss (FILE *fp, tree decl, const char *name, |
2480 | unsigned HOST_WIDE_INT size, | |
46a99b06 IS |
2481 | unsigned int l2align) |
2482 | { | |
dcf59c5c | 2483 | if (DARWIN_SECTION_ANCHORS && flag_section_anchors && size < BYTES_ZFILL) |
46a99b06 IS |
2484 | { |
2485 | /* Put smaller objects in _static_data, where the section anchors system | |
2486 | can get them. | |
2487 | However, if they are zero-sized punt them to yet a different section | |
2488 | (that is not allowed to participate in anchoring). */ | |
2489 | if (!size) | |
2490 | { | |
2491 | fputs ("\t.section\t__DATA,__zobj_bss\n", fp); | |
2492 | in_section = darwin_sections[zobj_bss_section]; | |
2493 | size = 1; | |
2494 | } | |
2495 | else | |
2496 | { | |
2497 | fputs ("\t.static_data\n", fp); | |
2498 | in_section = darwin_sections[static_data_section]; | |
2499 | } | |
2500 | ||
2501 | if (l2align) | |
2502 | fprintf (fp, "\t.align\t%u\n", l2align); | |
2503 | ||
a9e47ccf | 2504 | assemble_name (fp, name); |
16998094 | 2505 | fprintf (fp, ":\n\t.space\t" HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); |
46a99b06 | 2506 | } |
a9e47ccf | 2507 | else |
46a99b06 | 2508 | { |
dcf59c5c IS |
2509 | /* When we are on a non-section anchor target (or not using section |
2510 | anchors, we can get zero-sized items here. However, all we need to | |
2511 | do is to bump them to one byte and the section alignment will take | |
2512 | care of the rest. */ | |
46a99b06 | 2513 | char secnam[64]; |
dcf59c5c IS |
2514 | snprintf (secnam, 64, "__DATA,__bss"); |
2515 | unsigned int flags = SECTION_BSS|SECTION_WRITE|SECTION_NO_ANCHOR; | |
46a99b06 IS |
2516 | in_section = get_section (secnam, flags, NULL); |
2517 | fprintf (fp, "\t.zerofill %s,", secnam); | |
2518 | assemble_name (fp, name); | |
2519 | if (!size) | |
2520 | size = 1; | |
2521 | ||
2522 | if (l2align) | |
16998094 | 2523 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", |
46a99b06 IS |
2524 | size, (unsigned) l2align); |
2525 | else | |
dcf59c5c | 2526 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED",0\n", size); |
46a99b06 IS |
2527 | } |
2528 | ||
2529 | (*targetm.encode_section_info) (decl, DECL_RTL (decl), false); | |
2530 | /* This is defined as a file-scope var, so we know to notify machopic. */ | |
2531 | machopic_define_symbol (DECL_RTL (decl)); | |
2532 | } | |
2533 | ||
2534 | /* Emit a chunk of common. */ | |
2535 | static void | |
2536 | darwin_emit_common (FILE *fp, const char *name, | |
a9e47ccf | 2537 | unsigned HOST_WIDE_INT size, unsigned int align) |
46a99b06 IS |
2538 | { |
2539 | unsigned HOST_WIDE_INT rounded; | |
2540 | unsigned int l2align; | |
e4f7c483 | 2541 | |
a9e47ccf | 2542 | /* Earlier systems complain if the alignment exceeds the page size. |
46a99b06 IS |
2543 | The magic number is 4096 * 8 - hard-coded for legacy systems. */ |
2544 | if (!emit_aligned_common && (align > 32768UL)) | |
2545 | align = 4096UL; /* In units. */ | |
2546 | else | |
2547 | align /= BITS_PER_UNIT; | |
2548 | ||
2549 | /* Make sure we have a meaningful align. */ | |
2550 | if (!align) | |
2551 | align = 1; | |
2552 | ||
a9e47ccf | 2553 | /* For earlier toolchains, we need to emit the var as a rounded size to |
46a99b06 | 2554 | tell ld the alignment. */ |
a9e47ccf | 2555 | if (size < align) |
46a99b06 IS |
2556 | rounded = align; |
2557 | else | |
2558 | rounded = (size + (align-1)) & ~(align-1); | |
2559 | ||
2560 | l2align = floor_log2 (align); | |
46a99b06 IS |
2561 | |
2562 | in_section = comm_section; | |
2563 | /* We mustn't allow multiple public symbols to share an address when using | |
2564 | the normal OSX toolchain. */ | |
2565 | if (!size) | |
2566 | { | |
2567 | /* Put at least one byte. */ | |
2568 | size = 1; | |
2569 | /* This section can no longer participate in section anchoring. */ | |
2570 | comm_section->common.flags |= SECTION_NO_ANCHOR; | |
2571 | } | |
2572 | ||
2573 | fputs ("\t.comm\t", fp); | |
2574 | assemble_name (fp, name); | |
a9e47ccf | 2575 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED, |
46a99b06 IS |
2576 | emit_aligned_common?size:rounded); |
2577 | if (l2align && emit_aligned_common) | |
2578 | fprintf (fp, ",%u", l2align); | |
2579 | fputs ("\n", fp); | |
2580 | } | |
2581 | ||
2582 | /* Output a var which is all zero - into aligned BSS sections, common, lcomm | |
2583 | or coalescable data sections (for weak or comdat) as appropriate. */ | |
2584 | ||
2585 | void | |
2586 | darwin_output_aligned_bss (FILE *fp, tree decl, const char *name, | |
2587 | unsigned HOST_WIDE_INT size, unsigned int align) | |
2588 | { | |
2589 | unsigned int l2align; | |
2590 | bool one, pub, weak; | |
d764a8e6 | 2591 | tree meta; |
46a99b06 IS |
2592 | |
2593 | pub = TREE_PUBLIC (decl); | |
2594 | one = DECL_ONE_ONLY (decl); | |
2595 | weak = (DECL_P (decl) | |
2596 | && DECL_WEAK (decl) | |
a9e47ccf | 2597 | && !lookup_attribute ("weak_import", |
46a99b06 IS |
2598 | DECL_ATTRIBUTES (decl))); |
2599 | ||
2600 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2601 | fprintf (fp, "# albss: %s (%lld,%d) ro %d cst %d stat %d com %d" | |
2602 | " pub %d weak %d one %d init %lx\n", | |
a9e47ccf | 2603 | name, (long long)size, (int)align, TREE_READONLY (decl), |
46a99b06 | 2604 | TREE_CONSTANT (decl), TREE_STATIC (decl), DECL_COMMON (decl), |
a9e47ccf | 2605 | pub, weak, one, (unsigned long)DECL_INITIAL (decl)); |
46a99b06 IS |
2606 | #endif |
2607 | ||
a9e47ccf | 2608 | /* ObjC metadata can get put in BSS because varasm.c decides it's BSS |
d764a8e6 IS |
2609 | before the target has a chance to comment. */ |
2610 | if ((meta = is_objc_metadata (decl))) | |
2611 | { | |
2612 | darwin_emit_objc_zeroed (fp, decl, name, size, DECL_ALIGN (decl), meta); | |
2613 | return; | |
2614 | } | |
2615 | ||
46a99b06 | 2616 | /* Check that any initializer is valid. */ |
a9e47ccf IS |
2617 | gcc_assert ((DECL_INITIAL (decl) == NULL) |
2618 | || (DECL_INITIAL (decl) == error_mark_node) | |
46a99b06 IS |
2619 | || initializer_zerop (DECL_INITIAL (decl))); |
2620 | ||
2621 | gcc_assert (DECL_SECTION_NAME (decl) == NULL); | |
2622 | gcc_assert (!DECL_COMMON (decl)); | |
2623 | ||
2624 | /* Pick up the correct alignment. */ | |
2625 | if (!size || !align) | |
2626 | align = DECL_ALIGN (decl); | |
2627 | ||
2628 | l2align = floor_log2 (align / BITS_PER_UNIT); | |
2629 | gcc_assert (l2align <= L2_MAX_OFILE_ALIGNMENT); | |
a9e47ccf | 2630 | |
46a99b06 IS |
2631 | last_assemble_variable_decl = decl; |
2632 | ||
2633 | /* We would rather not have to check this here - but it seems that we might | |
2634 | be passed a decl that should be in coalesced space. */ | |
2635 | if (one || weak) | |
2636 | { | |
7607219d | 2637 | /* Weak or COMDAT objects are put in mergeable sections. */ |
a9e47ccf | 2638 | darwin_emit_weak_or_comdat (fp, decl, name, size, |
794fa8a6 | 2639 | ld_uses_coal_sects, DECL_ALIGN (decl)); |
46a99b06 | 2640 | return; |
a9e47ccf | 2641 | } |
46a99b06 IS |
2642 | |
2643 | /* If this is not public, then emit according to local rules. */ | |
2644 | if (!pub) | |
2645 | { | |
a9e47ccf | 2646 | darwin_emit_local_bss (fp, decl, name, size, l2align); |
46a99b06 IS |
2647 | return; |
2648 | } | |
2649 | ||
dcf59c5c IS |
2650 | /* So we have a public symbol. */ |
2651 | if (DARWIN_SECTION_ANCHORS && flag_section_anchors && size < BYTES_ZFILL) | |
46a99b06 IS |
2652 | { |
2653 | /* Put smaller objects in data, where the section anchors system can get | |
a9e47ccf | 2654 | them. However, if they are zero-sized punt them to yet a different |
46a99b06 IS |
2655 | section (that is not allowed to participate in anchoring). */ |
2656 | if (!size) | |
2657 | { | |
2658 | fputs ("\t.section\t__DATA,__zobj_data\n", fp); | |
2659 | in_section = darwin_sections[zobj_data_section]; | |
2660 | size = 1; | |
2661 | } | |
2662 | else | |
2663 | { | |
2664 | fputs ("\t.data\n", fp); | |
2665 | in_section = data_section; | |
2666 | } | |
2667 | ||
2668 | if (l2align) | |
2669 | fprintf (fp, "\t.align\t%u\n", l2align); | |
2670 | ||
2671 | assemble_name (fp, name); | |
16998094 | 2672 | fprintf (fp, ":\n\t.space\t" HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); |
46a99b06 | 2673 | } |
a9e47ccf | 2674 | else |
46a99b06 | 2675 | { |
dcf59c5c IS |
2676 | /* Section anchors not in use. */ |
2677 | unsigned int flags = SECTION_BSS|SECTION_WRITE|SECTION_NO_ANCHOR; | |
46a99b06 | 2678 | char secnam[64]; |
dcf59c5c | 2679 | snprintf (secnam, 64, "__DATA,__common"); |
46a99b06 IS |
2680 | in_section = get_section (secnam, flags, NULL); |
2681 | fprintf (fp, "\t.zerofill %s,", secnam); | |
2682 | assemble_name (fp, name); | |
2683 | if (!size) | |
2684 | size = 1; | |
2685 | ||
2686 | if (l2align) | |
16998094 | 2687 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", size, l2align); |
46a99b06 | 2688 | else |
dcf59c5c | 2689 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED",0\n", size); |
46a99b06 IS |
2690 | } |
2691 | (* targetm.encode_section_info) (decl, DECL_RTL (decl), false); | |
2692 | } | |
2693 | ||
2694 | /* Output a chunk of common, with alignment specified (where the target | |
2695 | supports this). */ | |
2696 | void | |
2697 | darwin_asm_output_aligned_decl_common (FILE *fp, tree decl, const char *name, | |
a9e47ccf | 2698 | unsigned HOST_WIDE_INT size, |
46a99b06 IS |
2699 | unsigned int align) |
2700 | { | |
2701 | unsigned int l2align; | |
2702 | bool one, weak; | |
d764a8e6 IS |
2703 | tree meta; |
2704 | ||
46a99b06 IS |
2705 | /* No corresponding var. */ |
2706 | if (decl==NULL) | |
2707 | { | |
2708 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
a9e47ccf | 2709 | fprintf (fp, "# adcom: %s (%d,%d) decl=0x0\n", name, (int)size, (int)align); |
46a99b06 | 2710 | #endif |
19bf83a9 IS |
2711 | /* Common variables are limited to a maximum alignment of 2^15. */ |
2712 | if (align > 32768) | |
2713 | error_at (UNKNOWN_LOCATION, "common variables must have an alignment" | |
2714 | " of 32678 or less"); | |
46a99b06 IS |
2715 | darwin_emit_common (fp, name, size, align); |
2716 | return; | |
2717 | } | |
2718 | ||
2719 | one = DECL_ONE_ONLY (decl); | |
2720 | weak = (DECL_P (decl) | |
2721 | && DECL_WEAK (decl) | |
a9e47ccf | 2722 | && !lookup_attribute ("weak_import", |
46a99b06 IS |
2723 | DECL_ATTRIBUTES (decl))); |
2724 | ||
2725 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2726 | fprintf (fp, "# adcom: %s (%lld,%d) ro %d cst %d stat %d com %d pub %d" | |
2727 | " weak %d one %d init %lx\n", | |
a9e47ccf | 2728 | name, (long long)size, (int)align, TREE_READONLY (decl), |
46a99b06 | 2729 | TREE_CONSTANT (decl), TREE_STATIC (decl), DECL_COMMON (decl), |
a9e47ccf | 2730 | TREE_PUBLIC (decl), weak, one, (unsigned long)DECL_INITIAL (decl)); |
46a99b06 IS |
2731 | #endif |
2732 | ||
a9e47ccf | 2733 | /* ObjC metadata can get put in BSS because varasm.c decides it's BSS |
d764a8e6 IS |
2734 | before the target has a chance to comment. */ |
2735 | if ((meta = is_objc_metadata (decl))) | |
2736 | { | |
2737 | darwin_emit_objc_zeroed (fp, decl, name, size, DECL_ALIGN (decl), meta); | |
2738 | return; | |
2739 | } | |
2740 | ||
46a99b06 | 2741 | /* We shouldn't be messing with this if the decl has a section name. */ |
19bf83a9 | 2742 | gcc_checking_assert (DECL_SECTION_NAME (decl) == NULL); |
46a99b06 IS |
2743 | |
2744 | /* We would rather not have to check this here - but it seems that we might | |
2745 | be passed a decl that should be in coalesced space. */ | |
2746 | if (one || weak) | |
2747 | { | |
2748 | /* Weak or COMDAT objects are put in mergable sections. */ | |
a9e47ccf | 2749 | darwin_emit_weak_or_comdat (fp, decl, name, size, |
794fa8a6 | 2750 | ld_uses_coal_sects, DECL_ALIGN (decl)); |
46a99b06 | 2751 | return; |
a9e47ccf | 2752 | } |
46a99b06 | 2753 | |
a9e47ccf | 2754 | /* We should only get here for DECL_COMMON, with a zero init (and, in |
46a99b06 IS |
2755 | principle, only for public symbols too - although we deal with local |
2756 | ones below). */ | |
2757 | ||
2758 | /* Check the initializer is OK. */ | |
a9e47ccf IS |
2759 | gcc_assert (DECL_COMMON (decl) |
2760 | && ((DECL_INITIAL (decl) == NULL) | |
2761 | || (DECL_INITIAL (decl) == error_mark_node) | |
46a99b06 IS |
2762 | || initializer_zerop (DECL_INITIAL (decl)))); |
2763 | ||
2764 | last_assemble_variable_decl = decl; | |
2765 | ||
a9e47ccf | 2766 | if (!size || !align) |
46a99b06 IS |
2767 | align = DECL_ALIGN (decl); |
2768 | ||
2769 | l2align = floor_log2 (align / BITS_PER_UNIT); | |
2770 | /* Check we aren't asking for more aligment than the platform allows. */ | |
19bf83a9 | 2771 | gcc_checking_assert (l2align <= L2_MAX_OFILE_ALIGNMENT); |
46a99b06 IS |
2772 | |
2773 | if (TREE_PUBLIC (decl) != 0) | |
19bf83a9 IS |
2774 | { |
2775 | /* Common variables are limited to a maximum alignment of 2^15. */ | |
2776 | if (l2align > 15) | |
2777 | error_at (DECL_SOURCE_LOCATION (decl), "common variables must have" | |
2778 | " an alignment of 32678 or less"); | |
2779 | darwin_emit_common (fp, name, size, align); | |
2780 | } | |
46a99b06 | 2781 | else |
a9e47ccf | 2782 | darwin_emit_local_bss (fp, decl, name, size, l2align); |
46a99b06 IS |
2783 | } |
2784 | ||
2785 | /* Output a chunk of BSS with alignment specfied. */ | |
2786 | void | |
a9e47ccf IS |
2787 | darwin_asm_output_aligned_decl_local (FILE *fp, tree decl, const char *name, |
2788 | unsigned HOST_WIDE_INT size, | |
46a99b06 IS |
2789 | unsigned int align) |
2790 | { | |
2791 | unsigned long l2align; | |
2792 | bool one, weak; | |
d764a8e6 | 2793 | tree meta; |
46a99b06 IS |
2794 | |
2795 | one = DECL_ONE_ONLY (decl); | |
2796 | weak = (DECL_P (decl) | |
2797 | && DECL_WEAK (decl) | |
a9e47ccf | 2798 | && !lookup_attribute ("weak_import", |
46a99b06 IS |
2799 | DECL_ATTRIBUTES (decl))); |
2800 | ||
2801 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2802 | fprintf (fp, "# adloc: %s (%lld,%d) ro %d cst %d stat %d one %d pub %d" | |
2803 | " weak %d init %lx\n", | |
a9e47ccf | 2804 | name, (long long)size, (int)align, TREE_READONLY (decl), |
46a99b06 | 2805 | TREE_CONSTANT (decl), TREE_STATIC (decl), one, TREE_PUBLIC (decl), |
a9e47ccf | 2806 | weak , (unsigned long)DECL_INITIAL (decl)); |
46a99b06 IS |
2807 | #endif |
2808 | ||
a9e47ccf | 2809 | /* ObjC metadata can get put in BSS because varasm.c decides it's BSS |
d764a8e6 IS |
2810 | before the target has a chance to comment. */ |
2811 | if ((meta = is_objc_metadata (decl))) | |
2812 | { | |
2813 | darwin_emit_objc_zeroed (fp, decl, name, size, DECL_ALIGN (decl), meta); | |
2814 | return; | |
2815 | } | |
2816 | ||
46a99b06 IS |
2817 | /* We shouldn't be messing with this if the decl has a section name. */ |
2818 | gcc_assert (DECL_SECTION_NAME (decl) == NULL); | |
2819 | ||
2820 | /* We would rather not have to check this here - but it seems that we might | |
2821 | be passed a decl that should be in coalesced space. */ | |
2822 | if (one || weak) | |
2823 | { | |
2824 | /* Weak or COMDAT objects are put in mergable sections. */ | |
a9e47ccf | 2825 | darwin_emit_weak_or_comdat (fp, decl, name, size, |
794fa8a6 | 2826 | ld_uses_coal_sects, DECL_ALIGN (decl)); |
46a99b06 | 2827 | return; |
a9e47ccf | 2828 | } |
46a99b06 IS |
2829 | |
2830 | /* .. and it should be suitable for placement in local mem. */ | |
2831 | gcc_assert(!TREE_PUBLIC (decl) && !DECL_COMMON (decl)); | |
2832 | /* .. and any initializer must be all-zero. */ | |
a9e47ccf IS |
2833 | gcc_assert ((DECL_INITIAL (decl) == NULL) |
2834 | || (DECL_INITIAL (decl) == error_mark_node) | |
46a99b06 IS |
2835 | || initializer_zerop (DECL_INITIAL (decl))); |
2836 | ||
2837 | last_assemble_variable_decl = decl; | |
2838 | ||
2839 | if (!size || !align) | |
2840 | align = DECL_ALIGN (decl); | |
2841 | ||
2842 | l2align = floor_log2 (align / BITS_PER_UNIT); | |
2843 | gcc_assert (l2align <= L2_MAX_OFILE_ALIGNMENT); | |
2844 | ||
2845 | darwin_emit_local_bss (fp, decl, name, size, l2align); | |
e4f7c483 AS |
2846 | } |
2847 | ||
6ce4806b MA |
2848 | /* Emit an assembler directive to set visibility for a symbol. The |
2849 | only supported visibilities are VISIBILITY_DEFAULT and | |
2850 | VISIBILITY_HIDDEN; the latter corresponds to Darwin's "private | |
2851 | extern". There is no MACH-O equivalent of ELF's | |
2852 | VISIBILITY_INTERNAL or VISIBILITY_PROTECTED. */ | |
2853 | ||
083cad55 | 2854 | void |
6ce4806b MA |
2855 | darwin_assemble_visibility (tree decl, int vis) |
2856 | { | |
2857 | if (vis == VISIBILITY_DEFAULT) | |
2858 | ; | |
b674cffe | 2859 | else if (vis == VISIBILITY_HIDDEN || vis == VISIBILITY_INTERNAL) |
6ce4806b MA |
2860 | { |
2861 | fputs ("\t.private_extern ", asm_out_file); | |
2862 | assemble_name (asm_out_file, | |
2863 | (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)))); | |
2864 | fputs ("\n", asm_out_file); | |
2865 | } | |
2866 | else | |
b674cffe | 2867 | warning (OPT_Wattributes, "protected visibility attribute " |
5c498b10 | 2868 | "not supported in this configuration; ignored"); |
6ce4806b MA |
2869 | } |
2870 | ||
9771b263 | 2871 | /* vec used by darwin_asm_dwarf_section. |
de4df14c | 2872 | Maybe a hash tab would be better here - but the intention is that this is |
a9e47ccf | 2873 | a very short list (fewer than 16 items) and each entry should (ideally, |
de4df14c IS |
2874 | eventually) only be presented once. |
2875 | ||
2876 | A structure to hold a dwarf debug section used entry. */ | |
2877 | ||
2878 | typedef struct GTY(()) dwarf_sect_used_entry { | |
2879 | const char *name; | |
2880 | unsigned count; | |
2881 | } | |
2882 | dwarf_sect_used_entry; | |
2883 | ||
de4df14c IS |
2884 | |
2885 | /* A list of used __DWARF sections. */ | |
9771b263 | 2886 | static GTY (()) vec<dwarf_sect_used_entry, va_gc> *dwarf_sect_names_table; |
de4df14c | 2887 | |
a9e47ccf | 2888 | /* This is called when we are asked to assemble a named section and the |
de4df14c IS |
2889 | name begins with __DWARF,. We keep a list of the section names (without |
2890 | the __DWARF, prefix) and use this to emit our required start label on the | |
2891 | first switch to each section. */ | |
2892 | ||
2893 | static void | |
2894 | darwin_asm_dwarf_section (const char *name, unsigned int flags, | |
1ea85365 | 2895 | tree ARG_UNUSED (decl), bool is_for_lto) |
de4df14c IS |
2896 | { |
2897 | unsigned i; | |
1ea85365 RB |
2898 | int namelen, extra = 0; |
2899 | const char *sect, *lto_add = ""; | |
2900 | char sname[64]; | |
de4df14c IS |
2901 | dwarf_sect_used_entry *ref; |
2902 | bool found = false; | |
1ea85365 RB |
2903 | |
2904 | gcc_checking_assert ((flags & (SECTION_DEBUG | SECTION_NAMED)) | |
2905 | == (SECTION_DEBUG | SECTION_NAMED)); | |
2906 | ||
2907 | /* We know that the name starts with __DWARF, or __GNU_DAWRF_LTO */ | |
2908 | sect = strchr (name, ',') + 1; | |
2909 | namelen = strchr (sect, ',') - sect; | |
2910 | gcc_checking_assert (namelen); | |
2911 | ||
2912 | /* The section switch is output as written... */ | |
2913 | fprintf (asm_out_file, "\t.section %s\n", name); | |
2914 | ||
2915 | /* ... but the string we keep to make section start labels needs | |
2916 | adjustment for lto cases. */ | |
2917 | if (is_for_lto) | |
2918 | { | |
2919 | lto_add = "_lto"; | |
2920 | extra = 4; | |
2921 | } | |
2922 | ||
2923 | snprintf (sname, 64, "%.*s%.*s", namelen, sect, extra, lto_add); | |
2924 | namelen += extra; | |
2925 | ||
de4df14c | 2926 | if (dwarf_sect_names_table == NULL) |
9771b263 | 2927 | vec_alloc (dwarf_sect_names_table, 16); |
de4df14c | 2928 | else |
a9e47ccf | 2929 | for (i = 0; |
9771b263 | 2930 | dwarf_sect_names_table->iterate (i, &ref); |
de4df14c IS |
2931 | i++) |
2932 | { | |
2933 | if (!ref) | |
2934 | break; | |
2935 | if (!strcmp (ref->name, sname)) | |
2936 | { | |
2937 | found = true; | |
2938 | ref->count++; | |
2939 | break; | |
2940 | } | |
2941 | } | |
2942 | ||
de4df14c IS |
2943 | if (!found) |
2944 | { | |
2945 | dwarf_sect_used_entry e; | |
2946 | fprintf (asm_out_file, "Lsection%.*s:\n", namelen, sname); | |
2947 | e.count = 1; | |
2948 | e.name = xstrdup (sname); | |
9771b263 | 2949 | vec_safe_push (dwarf_sect_names_table, e); |
de4df14c IS |
2950 | } |
2951 | } | |
2952 | ||
7606e68f SS |
2953 | /* Output a difference of two labels that will be an assembly time |
2954 | constant if the two labels are local. (.long lab1-lab2 will be | |
2955 | very different if lab1 is at the boundary between two sections; it | |
2956 | will be relocated according to the second section, not the first, | |
2957 | so one ends up with a difference between labels in different | |
2958 | sections, which is bad in the dwarf2 eh context for instance.) */ | |
2959 | ||
2960 | static int darwin_dwarf_label_counter; | |
2961 | ||
2962 | void | |
59d8fe27 | 2963 | darwin_asm_output_dwarf_delta (FILE *file, int size, |
7180b1a6 RB |
2964 | const char *lab1, const char *lab2, |
2965 | HOST_WIDE_INT offset) | |
7606e68f | 2966 | { |
4746cf84 MA |
2967 | int islocaldiff = (lab1[0] == '*' && lab1[1] == 'L' |
2968 | && lab2[0] == '*' && lab2[1] == 'L'); | |
d4b56511 | 2969 | const char *directive = (size == 8 ? ".quad" : ".long"); |
7606e68f SS |
2970 | |
2971 | if (islocaldiff) | |
2972 | fprintf (file, "\t.set L$set$%d,", darwin_dwarf_label_counter); | |
2973 | else | |
59d8fe27 | 2974 | fprintf (file, "\t%s\t", directive); |
46a99b06 | 2975 | |
57829bc4 | 2976 | assemble_name_raw (file, lab1); |
7606e68f | 2977 | fprintf (file, "-"); |
57829bc4 | 2978 | assemble_name_raw (file, lab2); |
7180b1a6 RB |
2979 | if (offset != 0) |
2980 | fprintf (file, "+" HOST_WIDE_INT_PRINT_DEC, offset); | |
7606e68f | 2981 | if (islocaldiff) |
59d8fe27 | 2982 | fprintf (file, "\n\t%s L$set$%d", directive, darwin_dwarf_label_counter++); |
7606e68f | 2983 | } |
192d0f89 | 2984 | |
192d0f89 GK |
2985 | /* Output an offset in a DWARF section on Darwin. On Darwin, DWARF section |
2986 | offsets are not represented using relocs in .o files; either the | |
2987 | section never leaves the .o file, or the linker or other tool is | |
2988 | responsible for parsing the DWARF and updating the offsets. */ | |
2989 | ||
2990 | void | |
2991 | darwin_asm_output_dwarf_offset (FILE *file, int size, const char * lab, | |
7180b1a6 | 2992 | HOST_WIDE_INT offset, section *base) |
192d0f89 GK |
2993 | { |
2994 | char sname[64]; | |
1ea85365 RB |
2995 | int namelen, extra = 0; |
2996 | bool is_for_lto; | |
2997 | const char *lto_add = ""; | |
2998 | ||
2999 | gcc_checking_assert (base->common.flags & SECTION_NAMED); | |
c0129e2d | 3000 | is_for_lto = startswith (base->named.name, "__GNU_DWARF_LTO,"); |
1ea85365 | 3001 | gcc_checking_assert (is_for_lto |
c0129e2d | 3002 | || startswith (base->named.name, "__DWARF,")); |
1ea85365 RB |
3003 | const char *name = strchr (base->named.name, ',') + 1; |
3004 | gcc_checking_assert (name); | |
3005 | ||
3006 | namelen = strchr (name, ',') - (name); | |
3007 | if (is_for_lto) | |
3008 | { | |
3009 | lto_add = "_lto"; | |
3010 | extra = 4; | |
3011 | } | |
3012 | snprintf (sname, 64, "*Lsection%.*s%.*s", namelen, name, extra, lto_add); | |
7180b1a6 | 3013 | darwin_asm_output_dwarf_delta (file, size, lab, sname, offset); |
192d0f89 | 3014 | } |
7606e68f | 3015 | |
b20577ea | 3016 | /* Called from the within the TARGET_ASM_FILE_START for each target. */ |
de4df14c IS |
3017 | |
3018 | void | |
3019 | darwin_file_start (void) | |
3020 | { | |
b20577ea | 3021 | /* Nothing to do. */ |
de4df14c IS |
3022 | } |
3023 | ||
3024 | /* Called for the TARGET_ASM_FILE_END hook. | |
3025 | Emit the mach-o pic indirection data, the lto data and, finally a flag | |
3026 | to tell the linker that it can break the file object into sections and | |
3027 | move those around for efficiency. */ | |
3028 | ||
a5fe455b | 3029 | void |
9c808aad | 3030 | darwin_file_end (void) |
a5fe455b | 3031 | { |
ae526fe5 | 3032 | if (!vec_safe_is_empty (ctors)) |
6a52ccb3 AP |
3033 | finalize_ctors (); |
3034 | if (!vec_safe_is_empty (dtors)) | |
3035 | finalize_dtors (); | |
fb5610fb IS |
3036 | |
3037 | /* If we are expecting to output NeXT ObjC meta-data, (and we actually see | |
3038 | some) then we output the fix-and-continue marker (Image Info). | |
3039 | This applies to Objective C, Objective C++ and LTO with either language | |
3040 | as part of the input. */ | |
3041 | if (flag_next_runtime && objc_metadata_seen) | |
3042 | { | |
3043 | unsigned int flags = 0; | |
3044 | if (flag_objc_abi >= 2) | |
3045 | { | |
3046 | flags = 16; | |
c1416683 | 3047 | switch_to_section (darwin_sections[objc2_image_info_section]); |
fb5610fb IS |
3048 | } |
3049 | else | |
c1416683 | 3050 | switch_to_section (darwin_sections[objc_image_info_section]); |
fb5610fb IS |
3051 | |
3052 | ASM_OUTPUT_ALIGN (asm_out_file, 2); | |
3053 | fputs ("L_OBJC_ImageInfo:\n", asm_out_file); | |
3054 | ||
3055 | flags |= (flag_replace_objc_classes && classes_seen) ? 1 : 0; | |
3056 | flags |= flag_objc_gc ? 2 : 0; | |
3057 | ||
3058 | fprintf (asm_out_file, "\t.long\t0\n\t.long\t%u\n", flags); | |
3059 | } | |
3060 | ||
a5fe455b | 3061 | machopic_finish (asm_out_file); |
8103659e | 3062 | if (flag_apple_kext) |
a5fe455b | 3063 | { |
8103659e | 3064 | /* These sections are only used for kernel code. */ |
56c779bc GK |
3065 | switch_to_section (darwin_sections[constructor_section]); |
3066 | switch_to_section (darwin_sections[destructor_section]); | |
a5fe455b ZW |
3067 | ASM_OUTPUT_ALIGN (asm_out_file, 1); |
3068 | } | |
c082f9f3 SB |
3069 | |
3070 | /* If there was LTO assembler output, append it to asm_out_file. */ | |
3071 | if (lto_asm_out_name) | |
3072 | { | |
3073 | int n; | |
3074 | char *buf, *lto_asm_txt; | |
3075 | ||
3076 | /* Shouldn't be here if we failed to switch back. */ | |
3077 | gcc_assert (! saved_asm_out_file); | |
3078 | ||
3079 | lto_asm_out_file = fopen (lto_asm_out_name, "r"); | |
3080 | if (lto_asm_out_file == NULL) | |
40fecdd6 JM |
3081 | fatal_error (input_location, |
3082 | "failed to open temporary file %s with LTO output", | |
c082f9f3 SB |
3083 | lto_asm_out_name); |
3084 | fseek (lto_asm_out_file, 0, SEEK_END); | |
3085 | n = ftell (lto_asm_out_file); | |
3086 | if (n > 0) | |
3087 | { | |
3088 | fseek (lto_asm_out_file, 0, SEEK_SET); | |
3089 | lto_asm_txt = buf = (char *) xmalloc (n + 1); | |
3090 | while (fgets (lto_asm_txt, n, lto_asm_out_file)) | |
3091 | fputs (lto_asm_txt, asm_out_file); | |
b20577ea IS |
3092 | /* Put a termination label. */ |
3093 | fprintf (asm_out_file, "\t.section %s,%s,regular,debug\n", | |
3094 | LTO_SEGMENT_NAME, LTO_SECTS_SECTION); | |
3095 | fprintf (asm_out_file, "L_GNU_LTO%d:\t;# end of lto\n", | |
3096 | lto_section_num); | |
3097 | /* Make sure our termination label stays in this section. */ | |
3098 | fputs ("\t.space\t1\n", asm_out_file); | |
c082f9f3 SB |
3099 | } |
3100 | ||
3101 | /* Remove the temporary file. */ | |
3102 | fclose (lto_asm_out_file); | |
3103 | unlink_if_ordinary (lto_asm_out_name); | |
3104 | free (lto_asm_out_name); | |
3105 | } | |
3106 | ||
b20577ea | 3107 | /* Output the names and indices. */ |
9771b263 | 3108 | if (lto_section_names && lto_section_names->length ()) |
c082f9f3 | 3109 | { |
b20577ea IS |
3110 | int count; |
3111 | darwin_lto_section_e *ref; | |
3112 | /* For now, we'll make the offsets 4 bytes and unaligned - we'll fix | |
3113 | the latter up ourselves. */ | |
3114 | const char *op = integer_asm_op (4,0); | |
3115 | ||
3116 | /* Emit the names. */ | |
3117 | fprintf (asm_out_file, "\t.section %s,%s,regular,debug\n", | |
c082f9f3 | 3118 | LTO_SEGMENT_NAME, LTO_NAMES_SECTION); |
9771b263 | 3119 | FOR_EACH_VEC_ELT (*lto_section_names, count, ref) |
b20577ea IS |
3120 | { |
3121 | fprintf (asm_out_file, "L_GNU_LTO_NAME%d:\n", count); | |
3122 | /* We have to jump through hoops to get the values of the intra-section | |
3123 | offsets... */ | |
3124 | fprintf (asm_out_file, | |
3125 | "\t.set L$gnu$lto$noff%d,L_GNU_LTO_NAME%d-L_GNU_LTO_NAME0\n", | |
3126 | count, count); | |
3127 | fprintf (asm_out_file, | |
3128 | "\t.set L$gnu$lto$nsiz%d,L_GNU_LTO_NAME%d-L_GNU_LTO_NAME%d\n", | |
3129 | count, count+1, count); | |
3130 | fprintf (asm_out_file, "\t.asciz\t\"%s\"\n", ref->sectname); | |
3131 | } | |
3132 | fprintf (asm_out_file, "L_GNU_LTO_NAME%d:\t;# end\n", lto_section_num); | |
3133 | /* make sure our termination label stays in this section. */ | |
3134 | fputs ("\t.space\t1\n", asm_out_file); | |
3135 | ||
3136 | /* Emit the Index. */ | |
3137 | fprintf (asm_out_file, "\t.section %s,%s,regular,debug\n", | |
3138 | LTO_SEGMENT_NAME, LTO_INDEX_SECTION); | |
3139 | fputs ("\t.align\t2\n", asm_out_file); | |
3140 | fputs ("# Section offset, Section length, Name offset, Name length\n", | |
3141 | asm_out_file); | |
9771b263 | 3142 | FOR_EACH_VEC_ELT (*lto_section_names, count, ref) |
b20577ea IS |
3143 | { |
3144 | fprintf (asm_out_file, "%s L$gnu$lto$offs%d\t;# %s\n", | |
3145 | op, count, ref->sectname); | |
3146 | fprintf (asm_out_file, "%s L$gnu$lto$size%d\n", op, count); | |
3147 | fprintf (asm_out_file, "%s L$gnu$lto$noff%d\n", op, count); | |
3148 | fprintf (asm_out_file, "%s L$gnu$lto$nsiz%d\n", op, count); | |
3149 | } | |
c082f9f3 | 3150 | } |
c082f9f3 | 3151 | |
46a99b06 IS |
3152 | /* If we have section anchors, then we must prevent the linker from |
3153 | re-arranging data. */ | |
3154 | if (!DARWIN_SECTION_ANCHORS || !flag_section_anchors) | |
3155 | fprintf (asm_out_file, "\t.subsections_via_symbols\n"); | |
2d9da1c8 IS |
3156 | |
3157 | /* We rely on this being NULL at the start of compilation; reset it here | |
3158 | so that JIT can reuse a context. */ | |
3159 | if (dwarf_sect_names_table != NULL) | |
3160 | { | |
3161 | dwarf_sect_names_table->truncate (0); | |
3162 | dwarf_sect_names_table = NULL; | |
3163 | } | |
a5fe455b ZW |
3164 | } |
3165 | ||
f475fd3c MS |
3166 | /* TODO: Add a language hook for identifying if a decl is a vtable. */ |
3167 | #define DARWIN_VTABLE_P(DECL) 0 | |
3168 | ||
a1765b42 IS |
3169 | /* Cross-module name binding. Darwin does not support overriding |
3170 | functions at dynamic-link time, except for vtables in kexts. */ | |
31920d83 DJ |
3171 | |
3172 | bool | |
3101faab | 3173 | darwin_binds_local_p (const_tree decl) |
31920d83 | 3174 | { |
6eee5151 | 3175 | /* We use the "shlib" input to indicate that a symbol should be |
a1765b42 IS |
3176 | considered overridable; only relevant for vtables in kernel modules |
3177 | on earlier system versions, and with a TODO to complete. */ | |
6eee5151 IS |
3178 | bool force_overridable = TARGET_KEXTABI && DARWIN_VTABLE_P (decl); |
3179 | return default_binds_local_p_3 (decl, force_overridable /* shlib */, | |
3180 | false /* weak dominate */, | |
3181 | false /* extern_protected_data */, | |
3182 | false /* common_local_p */); | |
31920d83 DJ |
3183 | } |
3184 | ||
ab0ff804 AP |
3185 | /* The Darwin's implementation of TARGET_ASM_OUTPUT_ANCHOR. Define the |
3186 | anchor relative to ".", the current section position. We cannot use | |
3187 | the default one because ASM_OUTPUT_DEF is wrong for Darwin. */ | |
ab0ff804 AP |
3188 | void |
3189 | darwin_asm_output_anchor (rtx symbol) | |
3190 | { | |
3191 | fprintf (asm_out_file, "\t.set\t"); | |
3192 | assemble_name (asm_out_file, XSTR (symbol, 0)); | |
3193 | fprintf (asm_out_file, ", . + " HOST_WIDE_INT_PRINT_DEC "\n", | |
3194 | SYMBOL_REF_BLOCK_OFFSET (symbol)); | |
3195 | } | |
46a99b06 | 3196 | |
2515981d | 3197 | /* Disable section anchoring on any section containing a zero-sized |
46a99b06 IS |
3198 | object. */ |
3199 | bool | |
3200 | darwin_use_anchors_for_symbol_p (const_rtx symbol) | |
3201 | { | |
2515981d | 3202 | if (DARWIN_SECTION_ANCHORS && flag_section_anchors) |
46a99b06 IS |
3203 | { |
3204 | section *sect; | |
3205 | /* If the section contains a zero-sized object it's ineligible. */ | |
3206 | sect = SYMBOL_REF_BLOCK (symbol)->sect; | |
3207 | /* This should have the effect of disabling anchors for vars that follow | |
2515981d | 3208 | any zero-sized one, in a given section. */ |
46a99b06 IS |
3209 | if (sect->common.flags & SECTION_NO_ANCHOR) |
3210 | return false; | |
3211 | ||
2515981d JBG |
3212 | /* Also check the normal reasons for suppressing. */ |
3213 | return default_use_anchors_for_symbol_p (symbol); | |
46a99b06 IS |
3214 | } |
3215 | else | |
3216 | return false; | |
3217 | } | |
ab0ff804 | 3218 | |
4f8bdef9 EC |
3219 | /* Set the darwin specific attributes on TYPE. */ |
3220 | void | |
3221 | darwin_set_default_type_attributes (tree type) | |
3222 | { | |
3223 | if (darwin_ms_struct | |
3224 | && TREE_CODE (type) == RECORD_TYPE) | |
3225 | TYPE_ATTRIBUTES (type) = tree_cons (get_identifier ("ms_struct"), | |
3226 | NULL_TREE, | |
3227 | TYPE_ATTRIBUTES (type)); | |
3228 | } | |
3229 | ||
3a057207 | 3230 | /* True, iff we're generating code for loadable kernel extensions. */ |
f475fd3c MS |
3231 | |
3232 | bool | |
3233 | darwin_kextabi_p (void) { | |
3234 | return flag_apple_kext; | |
3235 | } | |
3236 | ||
3237 | void | |
3238 | darwin_override_options (void) | |
3239 | { | |
1f81953b IS |
3240 | /* Keep track of which (major) version we're generating code for. */ |
3241 | if (darwin_macosx_version_min) | |
3242 | { | |
8703bf5d IS |
3243 | if (strverscmp (darwin_macosx_version_min, "10.7") >= 0) |
3244 | generating_for_darwin_version = 11; | |
3245 | else if (strverscmp (darwin_macosx_version_min, "10.6") >= 0) | |
1f81953b IS |
3246 | generating_for_darwin_version = 10; |
3247 | else if (strverscmp (darwin_macosx_version_min, "10.5") >= 0) | |
3248 | generating_for_darwin_version = 9; | |
8703bf5d IS |
3249 | else if (strverscmp (darwin_macosx_version_min, "10.4") >= 0) |
3250 | generating_for_darwin_version = 8; | |
1f81953b IS |
3251 | |
3252 | /* Earlier versions are not specifically accounted, until required. */ | |
3253 | } | |
46a99b06 | 3254 | |
66526c6a IS |
3255 | /* Some codegen needs to account for the capabilities of the target |
3256 | linker. */ | |
3257 | if (darwin_target_linker) | |
3258 | { | |
3259 | /* Older Darwin ld could not coalesce weak entities without them being | |
3260 | placed in special sections. */ | |
3261 | if (strverscmp (darwin_target_linker, MIN_LD64_NO_COAL_SECTS) < 0) | |
3262 | ld_uses_coal_sects = true; | |
3263 | ||
3264 | /* Some newer assemblers emit section start temp symbols for mod init | |
3265 | and term sections if there is no suitable symbol present already. | |
3266 | The temp symbols are linker visible and therefore appear in the | |
3267 | symbol tables. Since the temp symbol number can vary when debug is | |
3268 | enabled, that causes compare-debug fails. The solution is to provide | |
3269 | a stable linker-visible symbol. */ | |
3270 | if (strverscmp (darwin_target_linker, | |
3271 | MIN_LD64_INIT_TERM_START_LABELS) >= 0) | |
3272 | ld_init_term_start_labels = true; | |
3273 | } | |
794fa8a6 | 3274 | |
fea3ca91 IS |
3275 | /* In principle, this should be c-family only. However, we really need to |
3276 | set sensible defaults for LTO as well, since the section selection stuff | |
3277 | should check for correctness re. the ABI. TODO: check and provide the | |
3278 | flags (runtime & ABI) from the lto wrapper). */ | |
3279 | ||
8703bf5d IS |
3280 | /* At present, make a hard update to the runtime version based on the target |
3281 | OS version. */ | |
3282 | if (flag_next_runtime) | |
3283 | { | |
3284 | if (generating_for_darwin_version > 10) | |
3285 | flag_next_runtime = 100705; | |
3286 | else if (generating_for_darwin_version > 9) | |
3287 | flag_next_runtime = 100608; | |
3288 | else if (generating_for_darwin_version > 8) | |
3289 | flag_next_runtime = 100508; | |
3290 | else | |
3291 | flag_next_runtime = 100000; | |
3292 | } | |
3293 | ||
fea3ca91 | 3294 | /* Unless set, force ABI=2 for NeXT and m64, 0 otherwise. */ |
00f34291 | 3295 | if (!OPTION_SET_P (flag_objc_abi)) |
fea3ca91 IS |
3296 | global_options.x_flag_objc_abi |
3297 | = (!flag_next_runtime) | |
3298 | ? 0 | |
3299 | : (TARGET_64BIT ? 2 | |
3300 | : (generating_for_darwin_version >= 9) ? 1 | |
3301 | : 0); | |
3302 | ||
00f34291 | 3303 | if (OPTION_SET_P (flag_objc_abi) && flag_next_runtime) |
fea3ca91 | 3304 | { |
dee1497c IS |
3305 | if (TARGET_64BIT && global_options.x_flag_objc_abi != 2) |
3306 | /* The Objective-C family ABI 2 is the only valid version NeXT/m64. */ | |
3307 | error_at (UNKNOWN_LOCATION, | |
3308 | "%<-fobjc-abi-version%> 2 must be used for 64 bit targets" | |
3309 | " with %<-fnext-runtime%>"); | |
3310 | else if (!TARGET_64BIT && global_options.x_flag_objc_abi >= 2) | |
3311 | /* ABI versions 0 and 1 are the only valid versions NeXT/m32. */ | |
3312 | error_at (UNKNOWN_LOCATION, | |
3313 | "%<-fobjc-abi-version%> %d is not supported for 32 bit" | |
3314 | " targets with %<-fnext-runtime%>", | |
3315 | global_options.x_flag_objc_abi); | |
fea3ca91 IS |
3316 | } |
3317 | ||
a9e47ccf | 3318 | /* Don't emit DWARF3/4 unless specifically selected. This is a |
047a3193 | 3319 | workaround for tool bugs. */ |
00f34291 | 3320 | if (!OPTION_SET_P (dwarf_strict)) |
047a3193 | 3321 | dwarf_strict = 1; |
00f34291 | 3322 | if (!OPTION_SET_P (dwarf_version)) |
98095aa3 | 3323 | dwarf_version = 2; |
047a3193 | 3324 | |
00f34291 | 3325 | if (OPTION_SET_P (dwarf_split_debug_info)) |
c7a52e72 IS |
3326 | { |
3327 | inform (input_location, | |
a3f9f006 | 3328 | "%<-gsplit-dwarf%> is not supported on this platform, ignored"); |
c7a52e72 | 3329 | dwarf_split_debug_info = 0; |
00f34291 | 3330 | OPTION_SET_P (dwarf_split_debug_info) = 0; |
c7a52e72 IS |
3331 | } |
3332 | ||
a9e47ccf | 3333 | /* Do not allow unwind tables to be generated by default for m32. |
1f81953b IS |
3334 | fnon-call-exceptions will override this, regardless of what we do. */ |
3335 | if (generating_for_darwin_version < 10 | |
00f34291 | 3336 | && !OPTION_SET_P (flag_asynchronous_unwind_tables) |
1f81953b IS |
3337 | && !TARGET_64BIT) |
3338 | global_options.x_flag_asynchronous_unwind_tables = 0; | |
3339 | ||
9d53403c IS |
3340 | /* Disable -freorder-blocks-and-partition when unwind tables are being |
3341 | emitted for Darwin < 9 (OSX 10.5). | |
43dadcf3 | 3342 | The strategy is, "Unless the user has specifically set/unset an unwind |
9d53403c | 3343 | flag we will switch off -freorder-blocks-and-partition when unwind tables |
43dadcf3 IS |
3344 | will be generated". If the user specifically sets flags, we have to |
3345 | assume they know why. */ | |
14d11d40 | 3346 | if (generating_for_darwin_version < 9 |
00f34291 | 3347 | && OPTION_SET_P (flag_reorder_blocks_and_partition) |
8381075f | 3348 | && flag_reorder_blocks_and_partition |
1f81953b | 3349 | && ((global_options.x_flag_exceptions /* User, c++, java */ |
00f34291 | 3350 | && !OPTION_SET_P (flag_exceptions)) /* User specified... */ |
1f81953b | 3351 | || (global_options.x_flag_unwind_tables |
00f34291 | 3352 | && !OPTION_SET_P (flag_unwind_tables)) |
1f81953b | 3353 | || (global_options.x_flag_non_call_exceptions |
00f34291 | 3354 | && !OPTION_SET_P (flag_non_call_exceptions)) |
1f81953b | 3355 | || (global_options.x_flag_asynchronous_unwind_tables |
00f34291 | 3356 | && !OPTION_SET_P (flag_asynchronous_unwind_tables)))) |
9d53403c IS |
3357 | { |
3358 | inform (input_location, | |
a3f9f006 ML |
3359 | "%<-freorder-blocks-and-partition%> does not work with " |
3360 | "exceptions on this architecture"); | |
9d53403c IS |
3361 | flag_reorder_blocks_and_partition = 0; |
3362 | flag_reorder_blocks = 1; | |
3363 | } | |
47f447b1 | 3364 | |
f29234df IS |
3365 | /* FIXME: flag_objc_sjlj_exceptions is no longer needed since there is only |
3366 | one valid choice of exception scheme for each runtime. */ | |
00f34291 | 3367 | if (!OPTION_SET_P (flag_objc_sjlj_exceptions)) |
a9e47ccf | 3368 | global_options.x_flag_objc_sjlj_exceptions = |
f29234df IS |
3369 | flag_next_runtime && !TARGET_64BIT; |
3370 | ||
3371 | /* FIXME: and this could be eliminated then too. */ | |
00f34291 | 3372 | if (!OPTION_SET_P (flag_exceptions) |
f29234df IS |
3373 | && flag_objc_exceptions |
3374 | && TARGET_64BIT) | |
3375 | flag_exceptions = 1; | |
3376 | ||
f475fd3c MS |
3377 | if (flag_mkernel || flag_apple_kext) |
3378 | { | |
3379 | /* -mkernel implies -fapple-kext for C++ */ | |
dcc97066 | 3380 | if (lang_GNU_CXX ()) |
f475fd3c MS |
3381 | flag_apple_kext = 1; |
3382 | ||
3383 | flag_no_common = 1; | |
3384 | ||
3385 | /* No EH in kexts. */ | |
3386 | flag_exceptions = 0; | |
3387 | /* No -fnon-call-exceptions data in kexts. */ | |
3388 | flag_non_call_exceptions = 0; | |
46a99b06 IS |
3389 | /* so no tables either.. */ |
3390 | flag_unwind_tables = 0; | |
3391 | flag_asynchronous_unwind_tables = 0; | |
f475fd3c | 3392 | } |
46a99b06 | 3393 | |
1267ca30 | 3394 | if (flag_var_tracking_uninit == 0 |
89a012ea JH |
3395 | && generating_for_darwin_version >= 9 |
3396 | && (flag_gtoggle ? (debug_info_level == DINFO_LEVEL_NONE) | |
3397 | : (debug_info_level >= DINFO_LEVEL_NORMAL)) | |
66168f96 | 3398 | && dwarf_debuginfo_p ()) |
1267ca30 | 3399 | flag_var_tracking_uninit = flag_var_tracking; |
9005471b | 3400 | |
21f94af9 IS |
3401 | /* Final check on PCI options; for Darwin these are not dependent on the PIE |
3402 | ones, although PIE does require PIC to support it. */ | |
fee3eacd IS |
3403 | if (MACHO_DYNAMIC_NO_PIC_P) |
3404 | { | |
3405 | if (flag_pic) | |
0e9197f5 IS |
3406 | warning_at (UNKNOWN_LOCATION, 0, |
3407 | "%<-mdynamic-no-pic%> overrides %<-fpic%>, %<-fPIC%>," | |
3408 | " %<-fpie%> or %<-fPIE%>"); | |
fee3eacd IS |
3409 | flag_pic = 0; |
3410 | } | |
21f94af9 IS |
3411 | else if (flag_pic == 1 |
3412 | || (flag_pic == 0 && !(flag_mkernel || flag_apple_kext))) | |
fee3eacd | 3413 | { |
21f94af9 IS |
3414 | /* Darwin's -fpic is -fPIC. |
3415 | We only support "static" code in the kernel and kernel exts. */ | |
fee3eacd IS |
3416 | flag_pic = 2; |
3417 | } | |
3418 | ||
ce3a2015 IS |
3419 | /* Linkers >= ld64-62.1 (at least) are capable of making the necessary PIC |
3420 | indirections and we no longer need to emit pic symbol stubs. | |
a9e47ccf | 3421 | However, if we are generating code for earlier ones (or for use in the |
ce3a2015 | 3422 | kernel) the stubs might still be required, and this will be set true. |
dbe89f49 IS |
3423 | If the user sets it on or off - then that takes precedence. |
3424 | ||
3425 | Linkers that don't need stubs, don't need the EH symbol markers either. | |
3426 | */ | |
ce3a2015 | 3427 | |
00f34291 | 3428 | if (!OPTION_SET_P (darwin_symbol_stubs)) |
ce3a2015 | 3429 | { |
a9e47ccf | 3430 | if (darwin_target_linker) |
dbe89f49 IS |
3431 | { |
3432 | if (strverscmp (darwin_target_linker, MIN_LD64_OMIT_STUBS) < 0) | |
3433 | { | |
d308419c | 3434 | darwin_symbol_stubs = true; |
dbe89f49 IS |
3435 | ld_needs_eh_markers = true; |
3436 | } | |
a9e47ccf | 3437 | } |
dbe89f49 IS |
3438 | else if (generating_for_darwin_version < 9) |
3439 | { | |
3440 | /* If we don't know the linker version and we're targeting an old | |
a9e47ccf | 3441 | system, we know no better than to assume the use of an earlier |
dbe89f49 | 3442 | linker. */ |
d308419c | 3443 | darwin_symbol_stubs = true; |
dbe89f49 IS |
3444 | ld_needs_eh_markers = true; |
3445 | } | |
ce3a2015 | 3446 | } |
d308419c | 3447 | else if (DARWIN_X86 && darwin_symbol_stubs && TARGET_64BIT) |
ce3a2015 IS |
3448 | { |
3449 | inform (input_location, | |
093bdf2c ML |
3450 | "%<-mpic-symbol-stubs%> is not required for 64-bit code " |
3451 | "(ignored)"); | |
d308419c | 3452 | darwin_symbol_stubs = false; |
ce3a2015 IS |
3453 | } |
3454 | ||
3455 | if (generating_for_darwin_version >= 9) | |
3456 | /* Later systems can support aligned common. */ | |
3457 | emit_aligned_common = true; | |
26705988 IS |
3458 | |
3459 | /* The c_dialect...() macros are not available to us here. */ | |
3460 | darwin_running_cxx = (strstr (lang_hooks.name, "C++") != 0); | |
f475fd3c MS |
3461 | } |
3462 | ||
80f8fdf1 IS |
3463 | #if DARWIN_PPC |
3464 | /* Add $LDBL128 suffix to long double builtins for ppc darwin. */ | |
fb220235 FXC |
3465 | |
3466 | static void | |
80f8fdf1 | 3467 | darwin_patch_builtin (enum built_in_function fncode) |
fb220235 | 3468 | { |
e79983f4 | 3469 | tree fn = builtin_decl_explicit (fncode); |
fb220235 FXC |
3470 | tree sym; |
3471 | char *newname; | |
3472 | ||
3473 | if (!fn) | |
3474 | return; | |
3475 | ||
3476 | sym = DECL_ASSEMBLER_NAME (fn); | |
c92712d1 UB |
3477 | newname = ACONCAT (("_", IDENTIFIER_POINTER (sym), "$LDBL128", NULL)); |
3478 | ||
fb220235 | 3479 | set_user_assembler_name (fn, newname); |
fb220235 | 3480 | |
e79983f4 | 3481 | fn = builtin_decl_implicit (fncode); |
fb220235 FXC |
3482 | if (fn) |
3483 | set_user_assembler_name (fn, newname); | |
fb220235 FXC |
3484 | } |
3485 | ||
3486 | void | |
3487 | darwin_patch_builtins (void) | |
3488 | { | |
3489 | if (LONG_DOUBLE_TYPE_SIZE != 128) | |
3490 | return; | |
3491 | ||
3492 | #define PATCH_BUILTIN(fncode) darwin_patch_builtin (fncode); | |
c92712d1 UB |
3493 | #define PATCH_BUILTIN_NO64(fncode) \ |
3494 | if (!TARGET_64BIT) \ | |
fb220235 | 3495 | darwin_patch_builtin (fncode); |
c92712d1 UB |
3496 | #define PATCH_BUILTIN_VARIADIC(fncode) \ |
3497 | if (!TARGET_64BIT \ | |
fb220235 FXC |
3498 | && (strverscmp (darwin_macosx_version_min, "10.3.9") >= 0)) \ |
3499 | darwin_patch_builtin (fncode); | |
3500 | #include "darwin-ppc-ldouble-patch.def" | |
3501 | #undef PATCH_BUILTIN | |
3502 | #undef PATCH_BUILTIN_NO64 | |
3503 | #undef PATCH_BUILTIN_VARIADIC | |
3504 | } | |
80f8fdf1 | 3505 | #endif |
fb220235 | 3506 | |
26705988 IS |
3507 | /* CFStrings implementation. */ |
3508 | static GTY(()) tree cfstring_class_reference = NULL_TREE; | |
3509 | static GTY(()) tree cfstring_type_node = NULL_TREE; | |
3510 | static GTY(()) tree ccfstring_type_node = NULL_TREE; | |
3511 | static GTY(()) tree pccfstring_type_node = NULL_TREE; | |
3512 | static GTY(()) tree pcint_type_node = NULL_TREE; | |
3513 | static GTY(()) tree pcchar_type_node = NULL_TREE; | |
3514 | ||
d1d46f9f | 3515 | static enum built_in_function darwin_builtin_cfstring; |
26705988 IS |
3516 | |
3517 | /* Store all constructed constant CFStrings in a hash table so that | |
3518 | they get uniqued properly. */ | |
3519 | ||
2a22f99c | 3520 | typedef struct GTY ((for_user)) cfstring_descriptor { |
26705988 IS |
3521 | /* The string literal. */ |
3522 | tree literal; | |
3523 | /* The resulting constant CFString. */ | |
3524 | tree constructor; | |
3525 | } cfstring_descriptor; | |
3526 | ||
ca752f39 | 3527 | struct cfstring_hasher : ggc_ptr_hash<cfstring_descriptor> |
2a22f99c TS |
3528 | { |
3529 | static hashval_t hash (cfstring_descriptor *); | |
3530 | static bool equal (cfstring_descriptor *, cfstring_descriptor *); | |
3531 | }; | |
26705988 | 3532 | |
2a22f99c | 3533 | static GTY (()) hash_table<cfstring_hasher> *cfstring_htab; |
26705988 IS |
3534 | |
3535 | static tree | |
3536 | add_builtin_field_decl (tree type, const char *name, tree **chain) | |
3537 | { | |
a9e47ccf | 3538 | tree field = build_decl (BUILTINS_LOCATION, FIELD_DECL, |
26705988 IS |
3539 | get_identifier (name), type); |
3540 | ||
3541 | if (*chain != NULL) | |
3542 | **chain = field; | |
3543 | *chain = &DECL_CHAIN (field); | |
3544 | ||
3545 | return field; | |
3546 | } | |
3547 | ||
d1d46f9f MS |
3548 | tree |
3549 | darwin_init_cfstring_builtins (unsigned builtin_cfstring) | |
26705988 IS |
3550 | { |
3551 | tree cfsfun, fields, pccfstring_ftype_pcchar; | |
3552 | tree *chain = NULL; | |
3553 | ||
a9e47ccf | 3554 | darwin_builtin_cfstring = |
d1d46f9f | 3555 | (enum built_in_function) builtin_cfstring; |
a9e47ccf | 3556 | |
26705988 IS |
3557 | /* struct __builtin_CFString { |
3558 | const int *isa; (will point at | |
3559 | int flags; __CFConstantStringClassReference) | |
3560 | const char *str; | |
3561 | long length; | |
3562 | }; */ | |
3563 | ||
a9e47ccf | 3564 | pcint_type_node = build_pointer_type |
26705988 IS |
3565 | (build_qualified_type (integer_type_node, TYPE_QUAL_CONST)); |
3566 | ||
a9e47ccf | 3567 | pcchar_type_node = build_pointer_type |
26705988 IS |
3568 | (build_qualified_type (char_type_node, TYPE_QUAL_CONST)); |
3569 | ||
3570 | cfstring_type_node = (*lang_hooks.types.make_type) (RECORD_TYPE); | |
3571 | ||
3572 | /* Have to build backwards for finish struct. */ | |
3573 | fields = add_builtin_field_decl (long_integer_type_node, "length", &chain); | |
3574 | add_builtin_field_decl (pcchar_type_node, "str", &chain); | |
3575 | add_builtin_field_decl (integer_type_node, "flags", &chain); | |
3576 | add_builtin_field_decl (pcint_type_node, "isa", &chain); | |
3577 | finish_builtin_struct (cfstring_type_node, "__builtin_CFString", | |
3578 | fields, NULL_TREE); | |
3579 | ||
3580 | /* const struct __builtin_CFstring * | |
3581 | __builtin___CFStringMakeConstantString (const char *); */ | |
3582 | ||
a9e47ccf | 3583 | ccfstring_type_node = build_qualified_type |
26705988 IS |
3584 | (cfstring_type_node, TYPE_QUAL_CONST); |
3585 | pccfstring_type_node = build_pointer_type (ccfstring_type_node); | |
a9e47ccf | 3586 | pccfstring_ftype_pcchar = build_function_type_list |
26705988 IS |
3587 | (pccfstring_type_node, pcchar_type_node, NULL_TREE); |
3588 | ||
a9e47ccf | 3589 | cfsfun = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, |
26705988 IS |
3590 | get_identifier ("__builtin___CFStringMakeConstantString"), |
3591 | pccfstring_ftype_pcchar); | |
3592 | ||
3593 | TREE_PUBLIC (cfsfun) = 1; | |
3594 | DECL_EXTERNAL (cfsfun) = 1; | |
3595 | DECL_ARTIFICIAL (cfsfun) = 1; | |
3596 | /* Make a lang-specific section - dup_lang_specific_decl makes a new node | |
3597 | in place of the existing, which may be NULL. */ | |
3598 | DECL_LANG_SPECIFIC (cfsfun) = NULL; | |
3599 | (*lang_hooks.dup_lang_specific_decl) (cfsfun); | |
4d732405 | 3600 | set_decl_built_in_function (cfsfun, BUILT_IN_MD, darwin_builtin_cfstring); |
26705988 IS |
3601 | lang_hooks.builtin_function (cfsfun); |
3602 | ||
3603 | /* extern int __CFConstantStringClassReference[]; */ | |
3604 | cfstring_class_reference = build_decl (BUILTINS_LOCATION, VAR_DECL, | |
3605 | get_identifier ("__CFConstantStringClassReference"), | |
3606 | build_array_type (integer_type_node, NULL_TREE)); | |
3607 | ||
3608 | TREE_PUBLIC (cfstring_class_reference) = 1; | |
3609 | DECL_ARTIFICIAL (cfstring_class_reference) = 1; | |
3610 | (*lang_hooks.decls.pushdecl) (cfstring_class_reference); | |
3611 | DECL_EXTERNAL (cfstring_class_reference) = 1; | |
3612 | rest_of_decl_compilation (cfstring_class_reference, 0, 0); | |
a9e47ccf | 3613 | |
26705988 | 3614 | /* Initialize the hash table used to hold the constant CFString objects. */ |
2a22f99c | 3615 | cfstring_htab = hash_table<cfstring_hasher>::create_ggc (31); |
d1d46f9f MS |
3616 | |
3617 | return cfstring_type_node; | |
26705988 IS |
3618 | } |
3619 | ||
3620 | tree | |
a9e47ccf | 3621 | darwin_fold_builtin (tree fndecl, int n_args, tree *argp, |
26705988 IS |
3622 | bool ARG_UNUSED (ignore)) |
3623 | { | |
4d732405 | 3624 | unsigned int fcode = DECL_MD_FUNCTION_CODE (fndecl); |
a9e47ccf | 3625 | |
d1d46f9f | 3626 | if (fcode == darwin_builtin_cfstring) |
26705988 IS |
3627 | { |
3628 | if (!darwin_constant_cfstrings) | |
3629 | { | |
a9e47ccf | 3630 | error ("built-in function %qD requires the" |
26705988 IS |
3631 | " %<-mconstant-cfstrings%> flag", fndecl); |
3632 | return error_mark_node; | |
3633 | } | |
3634 | ||
3635 | if (n_args != 1) | |
3636 | { | |
3637 | error ("built-in function %qD takes one argument only", fndecl); | |
3638 | return error_mark_node; | |
3639 | } | |
3640 | ||
3641 | return darwin_build_constant_cfstring (*argp); | |
3642 | } | |
3643 | ||
3644 | return NULL_TREE; | |
3645 | } | |
3646 | ||
41cf94fb MS |
3647 | void |
3648 | darwin_rename_builtins (void) | |
3649 | { | |
41cf94fb MS |
3650 | } |
3651 | ||
c3c669ac IS |
3652 | /* Implementation for the TARGET_LIBC_HAS_FUNCTION hook. */ |
3653 | ||
d33d9e47 | 3654 | bool |
bae974e6 TV |
3655 | darwin_libc_has_function (enum function_class fn_class, |
3656 | tree type ATTRIBUTE_UNUSED) | |
d33d9e47 | 3657 | { |
c3c669ac | 3658 | if (fn_class == function_sincos && darwin_macosx_version_min) |
2e746ceb | 3659 | return (strverscmp (darwin_macosx_version_min, "10.9") >= 0); |
c3c669ac | 3660 | #if DARWIN_PPC && SUPPORT_DARWIN_LEGACY |
d33d9e47 AI |
3661 | if (fn_class == function_c99_math_complex |
3662 | || fn_class == function_c99_misc) | |
3663 | return (TARGET_64BIT | |
c3c669ac IS |
3664 | || (darwin_macosx_version_min && |
3665 | strverscmp (darwin_macosx_version_min, "10.3") >= 0)); | |
3666 | #endif | |
3667 | return default_libc_has_function (fn_class, type); | |
d33d9e47 AI |
3668 | } |
3669 | ||
2a22f99c TS |
3670 | hashval_t |
3671 | cfstring_hasher::hash (cfstring_descriptor *ptr) | |
26705988 | 3672 | { |
2a22f99c | 3673 | tree str = ptr->literal; |
26705988 IS |
3674 | const unsigned char *p = (const unsigned char *) TREE_STRING_POINTER (str); |
3675 | int i, len = TREE_STRING_LENGTH (str); | |
3676 | hashval_t h = len; | |
3677 | ||
3678 | for (i = 0; i < len; i++) | |
3679 | h = ((h * 613) + p[i]); | |
3680 | ||
3681 | return h; | |
3682 | } | |
3683 | ||
2a22f99c TS |
3684 | bool |
3685 | cfstring_hasher::equal (cfstring_descriptor *ptr1, cfstring_descriptor *ptr2) | |
26705988 | 3686 | { |
2a22f99c TS |
3687 | tree str1 = ptr1->literal; |
3688 | tree str2 = ptr2->literal; | |
26705988 IS |
3689 | int len1 = TREE_STRING_LENGTH (str1); |
3690 | ||
3691 | return (len1 == TREE_STRING_LENGTH (str2) | |
3692 | && !memcmp (TREE_STRING_POINTER (str1), TREE_STRING_POINTER (str2), | |
3693 | len1)); | |
3694 | } | |
3695 | ||
3696 | tree | |
3697 | darwin_build_constant_cfstring (tree str) | |
3698 | { | |
3699 | struct cfstring_descriptor *desc, key; | |
26705988 IS |
3700 | tree addr; |
3701 | ||
3702 | if (!str) | |
3703 | { | |
3704 | error ("CFString literal is missing"); | |
3705 | return error_mark_node; | |
3706 | } | |
3707 | ||
3708 | STRIP_NOPS (str); | |
3709 | ||
3710 | if (TREE_CODE (str) == ADDR_EXPR) | |
3711 | str = TREE_OPERAND (str, 0); | |
3712 | ||
3713 | if (TREE_CODE (str) != STRING_CST) | |
3714 | { | |
3715 | error ("CFString literal expression is not a string constant"); | |
3716 | return error_mark_node; | |
3717 | } | |
3718 | ||
3719 | /* Perhaps we already constructed a constant CFString just like this one? */ | |
3720 | key.literal = str; | |
2a22f99c TS |
3721 | cfstring_descriptor **loc = cfstring_htab->find_slot (&key, INSERT); |
3722 | desc = *loc; | |
26705988 IS |
3723 | |
3724 | if (!desc) | |
3725 | { | |
3726 | tree var, constructor, field; | |
9771b263 | 3727 | vec<constructor_elt, va_gc> *v = NULL; |
26705988 IS |
3728 | int length = TREE_STRING_LENGTH (str) - 1; |
3729 | ||
3730 | if (darwin_warn_nonportable_cfstrings) | |
3731 | { | |
3732 | const char *s = TREE_STRING_POINTER (str); | |
3733 | int l = 0; | |
3734 | ||
3735 | for (l = 0; l < length; l++) | |
3736 | if (!s[l] || !isascii (s[l])) | |
3737 | { | |
1d28bbdf JJ |
3738 | warning (darwin_warn_nonportable_cfstrings, |
3739 | s[l] ? G_("non-ASCII character in CFString literal") | |
3740 | : G_("embedded NUL in CFString literal")); | |
26705988 IS |
3741 | break; |
3742 | } | |
3743 | } | |
3744 | ||
766090c2 | 3745 | *loc = desc = ggc_cleared_alloc<cfstring_descriptor> (); |
26705988 IS |
3746 | desc->literal = str; |
3747 | ||
3748 | /* isa *. */ | |
3749 | field = TYPE_FIELDS (ccfstring_type_node); | |
a9e47ccf IS |
3750 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, |
3751 | build1 (ADDR_EXPR, TREE_TYPE (field), | |
26705988 IS |
3752 | cfstring_class_reference)); |
3753 | /* flags */ | |
3754 | field = DECL_CHAIN (field); | |
a9e47ccf | 3755 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, |
26705988 IS |
3756 | build_int_cst (TREE_TYPE (field), 0x000007c8)); |
3757 | /* string *. */ | |
3758 | field = DECL_CHAIN (field); | |
3759 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, | |
3760 | build1 (ADDR_EXPR, TREE_TYPE (field), str)); | |
3761 | /* length */ | |
3762 | field = DECL_CHAIN (field); | |
3763 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, | |
3764 | build_int_cst (TREE_TYPE (field), length)); | |
3765 | ||
3766 | constructor = build_constructor (ccfstring_type_node, v); | |
3767 | TREE_READONLY (constructor) = 1; | |
3768 | TREE_CONSTANT (constructor) = 1; | |
3769 | TREE_STATIC (constructor) = 1; | |
3770 | ||
3771 | /* Fromage: The C++ flavor of 'build_unary_op' expects constructor nodes | |
3772 | to have the TREE_HAS_CONSTRUCTOR (...) bit set. However, this file is | |
3773 | being built without any knowledge of C++ tree accessors; hence, we shall | |
3774 | use the generic accessor that TREE_HAS_CONSTRUCTOR actually maps to! */ | |
3775 | if (darwin_running_cxx) | |
3776 | TREE_LANG_FLAG_4 (constructor) = 1; /* TREE_HAS_CONSTRUCTOR */ | |
3777 | ||
3778 | /* Create an anonymous global variable for this CFString. */ | |
a9e47ccf | 3779 | var = build_decl (input_location, CONST_DECL, |
26705988 IS |
3780 | NULL, TREE_TYPE (constructor)); |
3781 | DECL_ARTIFICIAL (var) = 1; | |
3782 | TREE_STATIC (var) = 1; | |
3783 | DECL_INITIAL (var) = constructor; | |
3784 | /* FIXME: This should use a translation_unit_decl to indicate file scope. */ | |
3785 | DECL_CONTEXT (var) = NULL_TREE; | |
3786 | desc->constructor = var; | |
3787 | } | |
3788 | ||
3789 | addr = build1 (ADDR_EXPR, pccfstring_type_node, desc->constructor); | |
3790 | TREE_CONSTANT (addr) = 1; | |
3791 | ||
3792 | return addr; | |
3793 | } | |
3794 | ||
3795 | bool | |
3796 | darwin_cfstring_p (tree str) | |
3797 | { | |
3798 | struct cfstring_descriptor key; | |
26705988 IS |
3799 | |
3800 | if (!str) | |
3801 | return false; | |
3802 | ||
3803 | STRIP_NOPS (str); | |
3804 | ||
3805 | if (TREE_CODE (str) == ADDR_EXPR) | |
3806 | str = TREE_OPERAND (str, 0); | |
3807 | ||
3808 | if (TREE_CODE (str) != STRING_CST) | |
3809 | return false; | |
3810 | ||
3811 | key.literal = str; | |
2a22f99c | 3812 | cfstring_descriptor **loc = cfstring_htab->find_slot (&key, NO_INSERT); |
a9e47ccf | 3813 | |
26705988 IS |
3814 | if (loc) |
3815 | return true; | |
3816 | ||
3817 | return false; | |
3818 | } | |
3819 | ||
3820 | void | |
3821 | darwin_enter_string_into_cfstring_table (tree str) | |
3822 | { | |
3823 | struct cfstring_descriptor key; | |
26705988 IS |
3824 | |
3825 | key.literal = str; | |
2a22f99c | 3826 | cfstring_descriptor **loc = cfstring_htab->find_slot (&key, INSERT); |
26705988 IS |
3827 | |
3828 | if (!*loc) | |
3829 | { | |
766090c2 | 3830 | *loc = ggc_cleared_alloc<cfstring_descriptor> (); |
26705988 IS |
3831 | ((struct cfstring_descriptor *)*loc)->literal = str; |
3832 | } | |
3833 | } | |
fb220235 | 3834 | |
f16d3f39 JH |
3835 | /* Choose named function section based on its frequency. */ |
3836 | ||
3837 | section * | |
3838 | darwin_function_section (tree decl, enum node_frequency freq, | |
3839 | bool startup, bool exit) | |
3840 | { | |
1f81953b | 3841 | /* Decide if we need to put this in a coalescable section. */ |
794fa8a6 | 3842 | bool weak = (decl |
1f81953b IS |
3843 | && DECL_WEAK (decl) |
3844 | && (!DECL_ATTRIBUTES (decl) | |
a9e47ccf | 3845 | || !lookup_attribute ("weak_import", |
1f81953b IS |
3846 | DECL_ATTRIBUTES (decl)))); |
3847 | ||
794fa8a6 | 3848 | bool use_coal = weak && ld_uses_coal_sects; |
1f81953b IS |
3849 | /* If there is a specified section name, we should not be trying to |
3850 | override. */ | |
f961457f | 3851 | if (decl && DECL_SECTION_NAME (decl) != NULL) |
1f81953b IS |
3852 | return get_named_section (decl, NULL, 0); |
3853 | ||
e0c70bd7 IS |
3854 | /* We always put unlikely executed stuff in the cold section. */ |
3855 | if (freq == NODE_FREQUENCY_UNLIKELY_EXECUTED) | |
794fa8a6 IS |
3856 | return (use_coal) ? darwin_sections[text_cold_coal_section] |
3857 | : darwin_sections[text_cold_section]; | |
e0c70bd7 IS |
3858 | |
3859 | /* If we have LTO *and* feedback information, then let LTO handle | |
3860 | the function ordering, it makes a better job (for normal, hot, | |
3861 | startup and exit - hence the bailout for cold above). */ | |
3862 | if (in_lto_p && flag_profile_values) | |
3863 | goto default_function_sections; | |
3864 | ||
3865 | /* Non-cold startup code should go to startup subsection. */ | |
3866 | if (startup) | |
794fa8a6 IS |
3867 | return (use_coal) ? darwin_sections[text_startup_coal_section] |
3868 | : darwin_sections[text_startup_section]; | |
f16d3f39 JH |
3869 | |
3870 | /* Similarly for exit. */ | |
e0c70bd7 | 3871 | if (exit) |
794fa8a6 IS |
3872 | return (use_coal) ? darwin_sections[text_exit_coal_section] |
3873 | : darwin_sections[text_exit_section]; | |
e0c70bd7 IS |
3874 | |
3875 | /* Place hot code. */ | |
3876 | if (freq == NODE_FREQUENCY_HOT) | |
794fa8a6 IS |
3877 | return (use_coal) ? darwin_sections[text_hot_coal_section] |
3878 | : darwin_sections[text_hot_section]; | |
e0c70bd7 IS |
3879 | |
3880 | /* Otherwise, default to the 'normal' non-reordered sections. */ | |
3881 | default_function_sections: | |
794fa8a6 IS |
3882 | return (use_coal) ? darwin_sections[text_coal_section] |
3883 | : text_section; | |
f16d3f39 JH |
3884 | } |
3885 | ||
e2500fed | 3886 | #include "gt-darwin.h" |