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80d725d7 | 1 | /* Functions for generic Darwin as target machine for GNU C compiler. |
711789cc | 2 | Copyright (C) 1989-2013 Free Software Foundation, Inc. |
80d725d7 | 3 | Contributed by Apple Computer Inc. |
4 | ||
187b36cf | 5 | This file is part of GCC. |
80d725d7 | 6 | |
187b36cf | 7 | GCC is free software; you can redistribute it and/or modify |
80d725d7 | 8 | it under the terms of the GNU General Public License as published by |
038d1e19 | 9 | the Free Software Foundation; either version 3, or (at your option) |
80d725d7 | 10 | any later version. |
11 | ||
187b36cf | 12 | GCC is distributed in the hope that it will be useful, |
80d725d7 | 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
038d1e19 | 18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
80d725d7 | 20 | |
21 | #include "config.h" | |
22 | #include "system.h" | |
805e22b2 | 23 | #include "coretypes.h" |
24 | #include "tm.h" | |
80d725d7 | 25 | #include "rtl.h" |
26 | #include "regs.h" | |
27 | #include "hard-reg-set.h" | |
80d725d7 | 28 | #include "insn-config.h" |
29 | #include "conditions.h" | |
30 | #include "insn-flags.h" | |
31 | #include "output.h" | |
32 | #include "insn-attr.h" | |
33 | #include "flags.h" | |
34 | #include "tree.h" | |
9ed99284 | 35 | #include "stringpool.h" |
36 | #include "varasm.h" | |
37 | #include "stor-layout.h" | |
80d725d7 | 38 | #include "expr.h" |
39 | #include "reload.h" | |
80d725d7 | 40 | #include "function.h" |
41 | #include "ggc.h" | |
d19bd1f0 | 42 | #include "langhooks.h" |
6d3abfc0 | 43 | #include "target.h" |
79e2a0ca | 44 | #include "tm_p.h" |
0b205f4c | 45 | #include "diagnostic-core.h" |
690abe5d | 46 | #include "toplev.h" |
ab06d2ff | 47 | #include "hashtab.h" |
3072d30e | 48 | #include "df.h" |
cf756914 | 49 | #include "debug.h" |
23433d72 | 50 | #include "obstack.h" |
e795d6e1 | 51 | #include "gimple.h" |
a8783bee | 52 | #include "gimplify.h" |
23433d72 | 53 | #include "lto-streamer.h" |
80d725d7 | 54 | |
f0ed0e8a | 55 | /* Darwin supports a feature called fix-and-continue, which is used |
56 | for rapid turn around debugging. When code is compiled with the | |
57 | -mfix-and-continue flag, two changes are made to the generated code | |
58 | that allow the system to do things that it would normally not be | |
59 | able to do easily. These changes allow gdb to load in | |
60 | recompilation of a translation unit that has been changed into a | |
61 | running program and replace existing functions and methods of that | |
cb4213cd | 62 | translation unit with versions of those functions and methods |
f0ed0e8a | 63 | from the newly compiled translation unit. The new functions access |
d188633a | 64 | the existing static symbols from the old translation unit, if the |
65 | symbol existed in the unit to be replaced, and from the new | |
66 | translation unit, otherwise. | |
f0ed0e8a | 67 | |
8063e558 | 68 | The changes are to insert 5 nops at the beginning of all functions |
d188633a | 69 | and to use indirection to get at static symbols. The 5 nops |
f0ed0e8a | 70 | are required by consumers of the generated code. Currently, gdb |
71 | uses this to patch in a jump to the overriding function, this | |
72 | allows all uses of the old name to forward to the replacement, | |
84cbcde5 | 73 | including existing function pointers and virtual methods. See |
f0ed0e8a | 74 | rs6000_emit_prologue for the code that handles the nop insertions. |
b215c058 | 75 | |
f0ed0e8a | 76 | The added indirection allows gdb to redirect accesses to static |
d188633a | 77 | symbols from the newly loaded translation unit to the existing |
78 | symbol, if any. @code{static} symbols are special and are handled by | |
79 | setting the second word in the .non_lazy_symbol_pointer data | |
80 | structure to symbol. See indirect_data for the code that handles | |
81 | the extra indirection, and machopic_output_indirection and its use | |
82 | of MACHO_SYMBOL_STATIC for the code that handles @code{static} | |
83 | symbol indirection. */ | |
f0ed0e8a | 84 | |
3cf7ab3b | 85 | /* For darwin >= 9 (OSX 10.5) the linker is capable of making the necessary |
86 | branch islands and we no longer need to emit darwin stubs. | |
87 | However, if we are generating code for earlier systems (or for use in the | |
88 | kernel) the stubs might still be required, and this will be set true. */ | |
89 | int darwin_emit_branch_islands = false; | |
90 | ||
ed161dab | 91 | typedef struct GTY(()) cdtor_record { |
4b313269 | 92 | rtx symbol; |
ed161dab | 93 | int priority; /* [con/de]structor priority */ |
4b313269 | 94 | int position; /* original position */ |
ed161dab | 95 | } cdtor_record; |
4b313269 | 96 | |
ed161dab | 97 | static GTY(()) vec<cdtor_record, va_gc> *ctors = NULL; |
98 | static GTY(()) vec<cdtor_record, va_gc> *dtors = NULL; | |
4b313269 | 99 | |
d4238e8b | 100 | /* A flag to determine whether we are running c++ or obj-c++. This has to be |
101 | settable from non-c-family contexts too (i.e. we can't use the c_dialect_ | |
102 | functions). */ | |
103 | int darwin_running_cxx; | |
104 | ||
9e09909d | 105 | /* Some code-gen now depends on OS major version numbers (at least). */ |
106 | int generating_for_darwin_version ; | |
107 | ||
92e4ba7d | 108 | /* Section names. */ |
109 | section * darwin_sections[NUM_DARWIN_SECTIONS]; | |
2f14b1f9 | 110 | |
90ff10b3 | 111 | /* While we transition to using in-tests instead of ifdef'd code. */ |
112 | #ifndef HAVE_lo_sum | |
113 | #define HAVE_lo_sum 0 | |
114 | #define gen_macho_high(a,b) (a) | |
115 | #define gen_macho_low(a,b,c) (a) | |
116 | #endif | |
117 | ||
f720b7c6 | 118 | /* True if we're setting __attribute__ ((ms_struct)). */ |
119 | int darwin_ms_struct = false; | |
120 | ||
8e79e9d4 | 121 | /* Earlier versions of Darwin as do not recognize an alignment field in |
122 | .comm directives, this should be set for versions that allow it. */ | |
123 | int emit_aligned_common = false; | |
124 | ||
2f14b1f9 | 125 | /* A get_unnamed_section callback used to switch to an ObjC section. |
126 | DIRECTIVE is as for output_section_asm_op. */ | |
127 | ||
128 | static void | |
129 | output_objc_section_asm_op (const void *directive) | |
130 | { | |
92e4ba7d | 131 | static bool been_here = false; |
2f14b1f9 | 132 | |
163c9fff | 133 | /* The NeXT ObjC Runtime requires these sections to be present and in |
134 | order in the object. The code below implements this by emitting | |
135 | a section header for each ObjC section the first time that an ObjC | |
136 | section is requested. */ | |
92e4ba7d | 137 | if (! been_here) |
2f14b1f9 | 138 | { |
c4796e8b | 139 | section *saved_in_section = in_section; |
b215c058 | 140 | static const enum darwin_section_enum tomark[] = |
92e4ba7d | 141 | { |
142 | /* written, cold -> hot */ | |
143 | objc_cat_cls_meth_section, | |
144 | objc_cat_inst_meth_section, | |
145 | objc_string_object_section, | |
146 | objc_constant_string_object_section, | |
147 | objc_selector_refs_section, | |
148 | objc_selector_fixup_section, | |
149 | objc_cls_refs_section, | |
150 | objc_class_section, | |
151 | objc_meta_class_section, | |
152 | /* shared, hot -> cold */ | |
153 | objc_cls_meth_section, | |
154 | objc_inst_meth_section, | |
155 | objc_protocol_section, | |
156 | objc_class_names_section, | |
157 | objc_meth_var_types_section, | |
158 | objc_meth_var_names_section, | |
159 | objc_category_section, | |
160 | objc_class_vars_section, | |
161 | objc_instance_vars_section, | |
162 | objc_module_info_section, | |
267785bc | 163 | objc_symbols_section, |
92e4ba7d | 164 | }; |
267785bc | 165 | /* ABI=1 */ |
166 | static const enum darwin_section_enum tomarkv1[] = | |
167 | { | |
168 | objc1_protocol_ext_section, | |
169 | objc1_class_ext_section, | |
170 | objc1_prop_list_section | |
171 | } ; | |
172 | /* ABI=2 */ | |
173 | static const enum darwin_section_enum tomarkv2[] = | |
174 | { | |
175 | objc2_message_refs_section, | |
176 | objc2_classdefs_section, | |
177 | objc2_metadata_section, | |
178 | objc2_classrefs_section, | |
179 | objc2_classlist_section, | |
180 | objc2_categorylist_section, | |
181 | objc2_selector_refs_section, | |
182 | objc2_nonlazy_class_section, | |
183 | objc2_nonlazy_category_section, | |
184 | objc2_protocollist_section, | |
185 | objc2_protocolrefs_section, | |
186 | objc2_super_classrefs_section, | |
187 | objc2_image_info_section, | |
188 | objc2_constant_string_object_section | |
189 | } ; | |
92e4ba7d | 190 | size_t i; |
b215c058 | 191 | |
92e4ba7d | 192 | been_here = true; |
267785bc | 193 | if (flag_objc_abi < 2) |
194 | { | |
195 | for (i = 0; i < ARRAY_SIZE (tomark); i++) | |
196 | switch_to_section (darwin_sections[tomark[i]]); | |
197 | if (flag_objc_abi == 1) | |
198 | for (i = 0; i < ARRAY_SIZE (tomarkv1); i++) | |
199 | switch_to_section (darwin_sections[tomarkv1[i]]); | |
200 | } | |
201 | else | |
202 | for (i = 0; i < ARRAY_SIZE (tomarkv2); i++) | |
203 | switch_to_section (darwin_sections[tomarkv2[i]]); | |
204 | /* Make sure we don't get varasm.c out of sync with us. */ | |
c4796e8b | 205 | switch_to_section (saved_in_section); |
2f14b1f9 | 206 | } |
207 | output_section_asm_op (directive); | |
208 | } | |
209 | ||
61aeb501 | 210 | |
211 | /* Private flag applied to disable section-anchors in a particular section. */ | |
212 | #define SECTION_NO_ANCHOR SECTION_MACH_DEP | |
213 | ||
214 | ||
2f14b1f9 | 215 | /* Implement TARGET_ASM_INIT_SECTIONS. */ |
216 | ||
217 | void | |
218 | darwin_init_sections (void) | |
219 | { | |
92e4ba7d | 220 | #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) \ |
221 | darwin_sections[NAME] = \ | |
222 | get_unnamed_section (FLAGS, (OBJC \ | |
223 | ? output_objc_section_asm_op \ | |
224 | : output_section_asm_op), \ | |
225 | "\t" DIRECTIVE); | |
226 | #include "config/darwin-sections.def" | |
2f14b1f9 | 227 | #undef DEF_SECTION |
228 | ||
92e4ba7d | 229 | readonly_data_section = darwin_sections[const_section]; |
230 | exception_section = darwin_sections[darwin_exception_section]; | |
231 | eh_frame_section = darwin_sections[darwin_eh_frame_section]; | |
2f14b1f9 | 232 | } |
f0ed0e8a | 233 | |
80d725d7 | 234 | int |
b40da9a7 | 235 | name_needs_quotes (const char *name) |
80d725d7 | 236 | { |
237 | int c; | |
238 | while ((c = *name++) != '\0') | |
163c9fff | 239 | if (! ISIDNUM (c) |
240 | && c != '.' && c != '$' && c != '_' ) | |
80d725d7 | 241 | return 1; |
242 | return 0; | |
243 | } | |
244 | ||
866318b4 | 245 | /* Return true if SYM_REF can be used without an indirection. */ |
90ff10b3 | 246 | int |
ab06d2ff | 247 | machopic_symbol_defined_p (rtx sym_ref) |
80d725d7 | 248 | { |
866318b4 | 249 | if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_DEFINED) |
250 | return true; | |
251 | ||
252 | /* If a symbol references local and is not an extern to this | |
253 | file, then the symbol might be able to declared as defined. */ | |
254 | if (SYMBOL_REF_LOCAL_P (sym_ref) && ! SYMBOL_REF_EXTERNAL_P (sym_ref)) | |
255 | { | |
256 | /* If the symbol references a variable and the variable is a | |
257 | common symbol, then this symbol is not defined. */ | |
258 | if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_VARIABLE) | |
259 | { | |
260 | tree decl = SYMBOL_REF_DECL (sym_ref); | |
261 | if (!decl) | |
262 | return true; | |
263 | if (DECL_COMMON (decl)) | |
264 | return false; | |
265 | } | |
266 | return true; | |
267 | } | |
268 | return false; | |
80d725d7 | 269 | } |
270 | ||
ab06d2ff | 271 | /* This module assumes that (const (symbol_ref "foo")) is a legal pic |
272 | reference, which will not be changed. */ | |
b40da9a7 | 273 | |
80d725d7 | 274 | enum machopic_addr_class |
ab06d2ff | 275 | machopic_classify_symbol (rtx sym_ref) |
80d725d7 | 276 | { |
ab06d2ff | 277 | bool function_p; |
278 | ||
ab06d2ff | 279 | function_p = SYMBOL_REF_FUNCTION_P (sym_ref); |
280 | if (machopic_symbol_defined_p (sym_ref)) | |
b215c058 | 281 | return (function_p |
ab06d2ff | 282 | ? MACHOPIC_DEFINED_FUNCTION : MACHOPIC_DEFINED_DATA); |
283 | else | |
b215c058 | 284 | return (function_p |
ab06d2ff | 285 | ? MACHOPIC_UNDEFINED_FUNCTION : MACHOPIC_UNDEFINED_DATA); |
80d725d7 | 286 | } |
287 | ||
f0ed0e8a | 288 | #ifndef TARGET_FIX_AND_CONTINUE |
289 | #define TARGET_FIX_AND_CONTINUE 0 | |
290 | #endif | |
291 | ||
292 | /* Indicate when fix-and-continue style code generation is being used | |
293 | and when a reference to data should be indirected so that it can be | |
0975351b | 294 | rebound in a new translation unit to reference the original instance |
f0ed0e8a | 295 | of that data. Symbol names that are for code generation local to |
296 | the translation unit are bound to the new translation unit; | |
297 | currently this means symbols that begin with L or _OBJC_; | |
298 | otherwise, we indicate that an indirect reference should be made to | |
299 | permit the runtime to rebind new instances of the translation unit | |
300 | to the original instance of the data. */ | |
301 | ||
302 | static int | |
303 | indirect_data (rtx sym_ref) | |
304 | { | |
305 | int lprefix; | |
306 | const char *name; | |
307 | ||
c4f8e01f | 308 | /* If we aren't generating fix-and-continue code, don't do anything |
309 | special. */ | |
f0ed0e8a | 310 | if (TARGET_FIX_AND_CONTINUE == 0) |
311 | return 0; | |
312 | ||
313 | /* Otherwise, all symbol except symbols that begin with L or _OBJC_ | |
314 | are indirected. Symbols that begin with L and _OBJC_ are always | |
315 | bound to the current translation unit as they are used for | |
316 | generated local data of the translation unit. */ | |
317 | ||
318 | name = XSTR (sym_ref, 0); | |
319 | ||
320 | lprefix = (((name[0] == '*' || name[0] == '&') | |
321 | && (name[1] == 'L' || (name[1] == '"' && name[2] == 'L'))) | |
78a79402 | 322 | || (strncmp (name, "_OBJC_", 6) == 0)); |
f0ed0e8a | 323 | |
324 | return ! lprefix; | |
325 | } | |
326 | ||
80d725d7 | 327 | static int |
ab06d2ff | 328 | machopic_data_defined_p (rtx sym_ref) |
80d725d7 | 329 | { |
f0ed0e8a | 330 | if (indirect_data (sym_ref)) |
331 | return 0; | |
332 | ||
ab06d2ff | 333 | switch (machopic_classify_symbol (sym_ref)) |
80d725d7 | 334 | { |
335 | case MACHOPIC_DEFINED_DATA: | |
3a7ccce8 | 336 | case MACHOPIC_DEFINED_FUNCTION: |
80d725d7 | 337 | return 1; |
338 | default: | |
339 | return 0; | |
340 | } | |
341 | } | |
342 | ||
80d725d7 | 343 | void |
ab06d2ff | 344 | machopic_define_symbol (rtx mem) |
80d725d7 | 345 | { |
ab06d2ff | 346 | rtx sym_ref; |
b215c058 | 347 | |
27d2baef | 348 | gcc_assert (GET_CODE (mem) == MEM); |
ab06d2ff | 349 | sym_ref = XEXP (mem, 0); |
350 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; | |
80d725d7 | 351 | } |
352 | ||
a914e728 | 353 | /* Return either ORIG or: |
80d725d7 | 354 | |
a914e728 | 355 | (const:P (unspec:P [ORIG] UNSPEC_MACHOPIC_OFFSET)) |
ab06d2ff | 356 | |
a914e728 | 357 | depending on MACHO_DYNAMIC_NO_PIC_P. */ |
ab06d2ff | 358 | rtx |
a914e728 | 359 | machopic_gen_offset (rtx orig) |
ab06d2ff | 360 | { |
a914e728 | 361 | if (MACHO_DYNAMIC_NO_PIC_P) |
b06a3cc3 | 362 | return orig; |
363 | else | |
a914e728 | 364 | { |
365 | /* Play games to avoid marking the function as needing pic if we | |
366 | are being called as part of the cost-estimation process. */ | |
e5d1687d | 367 | if (current_ir_type () != IR_GIMPLE || currently_expanding_to_rtl) |
a914e728 | 368 | crtl->uses_pic_offset_table = 1; |
369 | orig = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, orig), | |
370 | UNSPEC_MACHOPIC_OFFSET); | |
371 | return gen_rtx_CONST (Pmode, orig); | |
372 | } | |
b06a3cc3 | 373 | } |
374 | ||
b186bdc9 | 375 | static GTY(()) const char * function_base_func_name; |
376 | static GTY(()) int current_pic_label_num; | |
f212a7d0 | 377 | static GTY(()) int emitted_pic_label_num; |
b186bdc9 | 378 | |
f212a7d0 | 379 | static void |
380 | update_pic_label_number_if_needed (void) | |
b186bdc9 | 381 | { |
382 | const char *current_name; | |
383 | ||
90ff10b3 | 384 | /* When we are generating _get_pc thunks within stubs, there is no current |
385 | function. */ | |
386 | if (current_function_decl) | |
387 | { | |
388 | current_name = | |
389 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl)); | |
390 | if (function_base_func_name != current_name) | |
391 | { | |
392 | ++current_pic_label_num; | |
393 | function_base_func_name = current_name; | |
394 | } | |
395 | } | |
396 | else | |
80d725d7 | 397 | { |
80d725d7 | 398 | ++current_pic_label_num; |
90ff10b3 | 399 | function_base_func_name = "L_machopic_stub_dummy"; |
80d725d7 | 400 | } |
f212a7d0 | 401 | } |
402 | ||
403 | void | |
404 | machopic_output_function_base_name (FILE *file) | |
405 | { | |
406 | /* If dynamic-no-pic is on, we should not get here. */ | |
407 | gcc_assert (!MACHO_DYNAMIC_NO_PIC_P); | |
408 | ||
409 | update_pic_label_number_if_needed (); | |
410 | fprintf (file, "L%d$pb", current_pic_label_num); | |
411 | } | |
412 | ||
4e2e3c2e | 413 | char curr_picbasename[32]; |
414 | ||
415 | const char * | |
416 | machopic_get_function_picbase (void) | |
417 | { | |
418 | /* If dynamic-no-pic is on, we should not get here. */ | |
419 | gcc_assert (!MACHO_DYNAMIC_NO_PIC_P); | |
420 | ||
421 | update_pic_label_number_if_needed (); | |
422 | snprintf (curr_picbasename, 32, "L%d$pb", current_pic_label_num); | |
423 | return (const char *) curr_picbasename; | |
424 | } | |
425 | ||
f212a7d0 | 426 | bool |
427 | machopic_should_output_picbase_label (void) | |
428 | { | |
429 | update_pic_label_number_if_needed (); | |
430 | ||
431 | if (current_pic_label_num == emitted_pic_label_num) | |
432 | return false; | |
433 | ||
434 | emitted_pic_label_num = current_pic_label_num; | |
435 | return true; | |
80d725d7 | 436 | } |
437 | ||
ab06d2ff | 438 | /* The suffix attached to non-lazy pointer symbols. */ |
439 | #define NON_LAZY_POINTER_SUFFIX "$non_lazy_ptr" | |
440 | /* The suffix attached to stub symbols. */ | |
441 | #define STUB_SUFFIX "$stub" | |
80d725d7 | 442 | |
fb1e4f4a | 443 | typedef struct GTY (()) machopic_indirection |
80d725d7 | 444 | { |
ab06d2ff | 445 | /* The SYMBOL_REF for the entity referenced. */ |
446 | rtx symbol; | |
6d3abfc0 | 447 | /* The name of the stub or non-lazy pointer. */ |
448 | const char * ptr_name; | |
ab06d2ff | 449 | /* True iff this entry is for a stub (as opposed to a non-lazy |
450 | pointer). */ | |
451 | bool stub_p; | |
452 | /* True iff this stub or pointer pointer has been referenced. */ | |
453 | bool used; | |
454 | } machopic_indirection; | |
455 | ||
456 | /* A table mapping stub names and non-lazy pointer names to | |
457 | SYMBOL_REFs for the stubbed-to and pointed-to entities. */ | |
458 | ||
b215c058 | 459 | static GTY ((param_is (struct machopic_indirection))) htab_t |
ab06d2ff | 460 | machopic_indirections; |
461 | ||
462 | /* Return a hash value for a SLOT in the indirections hash table. */ | |
463 | ||
464 | static hashval_t | |
465 | machopic_indirection_hash (const void *slot) | |
466 | { | |
467 | const machopic_indirection *p = (const machopic_indirection *) slot; | |
6d3abfc0 | 468 | return htab_hash_string (p->ptr_name); |
ab06d2ff | 469 | } |
b40da9a7 | 470 | |
ab06d2ff | 471 | /* Returns true if the KEY is the same as that associated with |
472 | SLOT. */ | |
473 | ||
474 | static int | |
475 | machopic_indirection_eq (const void *slot, const void *key) | |
476 | { | |
225ab426 | 477 | return strcmp (((const machopic_indirection *) slot)->ptr_name, |
478 | (const char *) key) == 0; | |
ab06d2ff | 479 | } |
80d725d7 | 480 | |
ab06d2ff | 481 | /* Return the name of the non-lazy pointer (if STUB_P is false) or |
482 | stub (if STUB_B is true) corresponding to the given name. */ | |
8dfaa51b | 483 | |
ab06d2ff | 484 | const char * |
485 | machopic_indirection_name (rtx sym_ref, bool stub_p) | |
486 | { | |
487 | char *buffer; | |
488 | const char *name = XSTR (sym_ref, 0); | |
6d3abfc0 | 489 | size_t namelen = strlen (name); |
ab06d2ff | 490 | machopic_indirection *p; |
6d3abfc0 | 491 | void ** slot; |
524eafbc | 492 | bool needs_quotes; |
493 | const char *suffix; | |
494 | const char *prefix = user_label_prefix; | |
495 | const char *quote = ""; | |
b359164b | 496 | tree id; |
497 | ||
498 | id = maybe_get_identifier (name); | |
499 | if (id) | |
500 | { | |
501 | tree id_orig = id; | |
502 | ||
503 | while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
504 | id = TREE_CHAIN (id); | |
505 | if (id != id_orig) | |
506 | { | |
507 | name = IDENTIFIER_POINTER (id); | |
508 | namelen = strlen (name); | |
509 | } | |
510 | } | |
b215c058 | 511 | |
524eafbc | 512 | if (name[0] == '*') |
8dfaa51b | 513 | { |
524eafbc | 514 | prefix = ""; |
515 | ++name; | |
516 | --namelen; | |
ab06d2ff | 517 | } |
524eafbc | 518 | |
519 | needs_quotes = name_needs_quotes (name); | |
520 | if (needs_quotes) | |
ab06d2ff | 521 | { |
524eafbc | 522 | quote = "\""; |
8dfaa51b | 523 | } |
524 | ||
524eafbc | 525 | if (stub_p) |
526 | suffix = STUB_SUFFIX; | |
527 | else | |
528 | suffix = NON_LAZY_POINTER_SUFFIX; | |
529 | ||
225ab426 | 530 | buffer = XALLOCAVEC (char, strlen ("&L") |
524eafbc | 531 | + strlen (prefix) |
532 | + namelen | |
533 | + strlen (suffix) | |
534 | + 2 * strlen (quote) | |
535 | + 1 /* '\0' */); | |
536 | ||
537 | /* Construct the name of the non-lazy pointer or stub. */ | |
538 | sprintf (buffer, "&%sL%s%s%s%s", quote, prefix, name, suffix, quote); | |
539 | ||
6d3abfc0 | 540 | if (!machopic_indirections) |
b215c058 | 541 | machopic_indirections = htab_create_ggc (37, |
6d3abfc0 | 542 | machopic_indirection_hash, |
543 | machopic_indirection_eq, | |
544 | /*htab_del=*/NULL); | |
b215c058 | 545 | |
6d3abfc0 | 546 | slot = htab_find_slot_with_hash (machopic_indirections, buffer, |
547 | htab_hash_string (buffer), INSERT); | |
548 | if (*slot) | |
549 | { | |
550 | p = (machopic_indirection *) *slot; | |
551 | } | |
552 | else | |
ab06d2ff | 553 | { |
ba72912a | 554 | p = ggc_alloc_machopic_indirection (); |
ab06d2ff | 555 | p->symbol = sym_ref; |
6d3abfc0 | 556 | p->ptr_name = xstrdup (buffer); |
ab06d2ff | 557 | p->stub_p = stub_p; |
6d3abfc0 | 558 | p->used = false; |
559 | *slot = p; | |
ab06d2ff | 560 | } |
b215c058 | 561 | |
6d3abfc0 | 562 | return p->ptr_name; |
80d725d7 | 563 | } |
564 | ||
ab06d2ff | 565 | /* Return the name of the stub for the mcount function. */ |
80d725d7 | 566 | |
ab06d2ff | 567 | const char* |
568 | machopic_mcount_stub_name (void) | |
80d725d7 | 569 | { |
620dd87a | 570 | rtx symbol = gen_rtx_SYMBOL_REF (Pmode, "*mcount"); |
571 | return machopic_indirection_name (symbol, /*stub_p=*/true); | |
80d725d7 | 572 | } |
573 | ||
ab06d2ff | 574 | /* If NAME is the name of a stub or a non-lazy pointer , mark the stub |
575 | or non-lazy pointer as used -- and mark the object to which the | |
576 | pointer/stub refers as used as well, since the pointer/stub will | |
577 | emit a reference to it. */ | |
578 | ||
80d725d7 | 579 | void |
ab06d2ff | 580 | machopic_validate_stub_or_non_lazy_ptr (const char *name) |
80d725d7 | 581 | { |
ab06d2ff | 582 | machopic_indirection *p; |
b215c058 | 583 | |
584 | p = ((machopic_indirection *) | |
6d3abfc0 | 585 | (htab_find_with_hash (machopic_indirections, name, |
586 | htab_hash_string (name)))); | |
587 | if (p && ! p->used) | |
ab06d2ff | 588 | { |
6d3abfc0 | 589 | const char *real_name; |
590 | tree id; | |
b215c058 | 591 | |
6d3abfc0 | 592 | p->used = true; |
593 | ||
09e39ca0 | 594 | /* Do what output_addr_const will do when we actually call it. */ |
595 | if (SYMBOL_REF_DECL (p->symbol)) | |
596 | mark_decl_referenced (SYMBOL_REF_DECL (p->symbol)); | |
597 | ||
598 | real_name = targetm.strip_name_encoding (XSTR (p->symbol, 0)); | |
b215c058 | 599 | |
6d3abfc0 | 600 | id = maybe_get_identifier (real_name); |
601 | if (id) | |
602 | mark_referenced (id); | |
ab06d2ff | 603 | } |
80d725d7 | 604 | } |
605 | ||
606 | /* Transform ORIG, which may be any data source, to the corresponding | |
607 | source using indirections. */ | |
608 | ||
609 | rtx | |
b40da9a7 | 610 | machopic_indirect_data_reference (rtx orig, rtx reg) |
80d725d7 | 611 | { |
612 | rtx ptr_ref = orig; | |
b40da9a7 | 613 | |
80d725d7 | 614 | if (! MACHOPIC_INDIRECT) |
615 | return orig; | |
616 | ||
617 | if (GET_CODE (orig) == SYMBOL_REF) | |
618 | { | |
ab06d2ff | 619 | int defined = machopic_data_defined_p (orig); |
8f74ae7b | 620 | |
621 | if (defined && MACHO_DYNAMIC_NO_PIC_P) | |
622 | { | |
90ff10b3 | 623 | if (DARWIN_PPC) |
624 | { | |
fed0a860 | 625 | /* Create a new register for CSE opportunities. */ |
e1ba4a27 | 626 | rtx hi_reg = (!can_create_pseudo_p () ? reg : gen_reg_rtx (Pmode)); |
fed0a860 | 627 | emit_insn (gen_macho_high (hi_reg, orig)); |
628 | emit_insn (gen_macho_low (reg, hi_reg, orig)); | |
90ff10b3 | 629 | return reg; |
630 | } | |
631 | else if (DARWIN_X86) | |
632 | return orig; | |
633 | else | |
8f74ae7b | 634 | /* some other cpu -- writeme! */ |
27d2baef | 635 | gcc_unreachable (); |
8f74ae7b | 636 | } |
637 | else if (defined) | |
80d725d7 | 638 | { |
90ff10b3 | 639 | rtx offset = NULL; |
640 | if (DARWIN_PPC || HAVE_lo_sum) | |
641 | offset = machopic_gen_offset (orig); | |
80d725d7 | 642 | |
90ff10b3 | 643 | if (DARWIN_PPC) |
644 | { | |
e1ba4a27 | 645 | rtx hi_sum_reg = (!can_create_pseudo_p () |
646 | ? reg | |
647 | : gen_reg_rtx (Pmode)); | |
80d725d7 | 648 | |
27d2baef | 649 | gcc_assert (reg); |
80d725d7 | 650 | |
37ec5024 | 651 | emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, |
652 | gen_rtx_PLUS (Pmode, pic_offset_table_rtx, | |
653 | gen_rtx_HIGH (Pmode, offset)))); | |
654 | emit_insn (gen_rtx_SET (Pmode, reg, | |
3b4a645f | 655 | gen_rtx_LO_SUM (Pmode, hi_sum_reg, |
656 | copy_rtx (offset)))); | |
80d725d7 | 657 | |
658 | orig = reg; | |
90ff10b3 | 659 | } |
660 | else if (HAVE_lo_sum) | |
661 | { | |
27d2baef | 662 | gcc_assert (reg); |
80d725d7 | 663 | |
37ec5024 | 664 | emit_insn (gen_rtx_SET (VOIDmode, reg, |
665 | gen_rtx_HIGH (Pmode, offset))); | |
666 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
3b4a645f | 667 | gen_rtx_LO_SUM (Pmode, reg, |
668 | copy_rtx (offset)))); | |
18b42941 | 669 | emit_use (pic_offset_table_rtx); |
80d725d7 | 670 | |
37ec5024 | 671 | orig = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, reg); |
90ff10b3 | 672 | } |
80d725d7 | 673 | return orig; |
674 | } | |
675 | ||
329f67ae | 676 | ptr_ref = (gen_rtx_SYMBOL_REF |
b215c058 | 677 | (Pmode, |
ab06d2ff | 678 | machopic_indirection_name (orig, /*stub_p=*/false))); |
80d725d7 | 679 | |
7c266bb1 | 680 | SYMBOL_REF_DATA (ptr_ref) = SYMBOL_REF_DATA (orig); |
f9226418 | 681 | |
e265a6da | 682 | ptr_ref = gen_const_mem (Pmode, ptr_ref); |
329f67ae | 683 | machopic_define_symbol (ptr_ref); |
80d725d7 | 684 | |
90ff10b3 | 685 | if (DARWIN_X86 |
686 | && reg | |
687 | && MACHO_DYNAMIC_NO_PIC_P) | |
688 | { | |
689 | emit_insn (gen_rtx_SET (Pmode, reg, ptr_ref)); | |
690 | ptr_ref = reg; | |
691 | } | |
692 | ||
80d725d7 | 693 | return ptr_ref; |
694 | } | |
695 | else if (GET_CODE (orig) == CONST) | |
696 | { | |
90ff10b3 | 697 | /* If "(const (plus ...", walk the PLUS and return that result. |
698 | PLUS processing (below) will restore the "(const ..." if | |
699 | appropriate. */ | |
80d725d7 | 700 | if (GET_CODE (XEXP (orig, 0)) == PLUS) |
90ff10b3 | 701 | return machopic_indirect_data_reference (XEXP (orig, 0), reg); |
702 | else | |
703 | return orig; | |
704 | } | |
705 | else if (GET_CODE (orig) == MEM) | |
706 | { | |
707 | XEXP (ptr_ref, 0) = | |
708 | machopic_indirect_data_reference (XEXP (orig, 0), reg); | |
709 | return ptr_ref; | |
710 | } | |
711 | else if (GET_CODE (orig) == PLUS) | |
712 | { | |
713 | rtx base, result; | |
714 | /* When the target is i386, this code prevents crashes due to the | |
715 | compiler's ignorance on how to move the PIC base register to | |
716 | other registers. (The reload phase sometimes introduces such | |
717 | insns.) */ | |
718 | if (GET_CODE (XEXP (orig, 0)) == REG | |
719 | && REGNO (XEXP (orig, 0)) == PIC_OFFSET_TABLE_REGNUM | |
720 | /* Prevent the same register from being erroneously used | |
721 | as both the base and index registers. */ | |
722 | && (DARWIN_X86 && (GET_CODE (XEXP (orig, 1)) == CONST)) | |
723 | && reg) | |
80d725d7 | 724 | { |
90ff10b3 | 725 | emit_move_insn (reg, XEXP (orig, 0)); |
726 | XEXP (ptr_ref, 0) = reg; | |
727 | return ptr_ref; | |
80d725d7 | 728 | } |
80d725d7 | 729 | |
90ff10b3 | 730 | /* Legitimize both operands of the PLUS. */ |
731 | base = machopic_indirect_data_reference (XEXP (orig, 0), reg); | |
732 | orig = machopic_indirect_data_reference (XEXP (orig, 1), | |
733 | (base == reg ? 0 : reg)); | |
734 | if (MACHOPIC_INDIRECT && (GET_CODE (orig) == CONST_INT)) | |
29c05e22 | 735 | result = plus_constant (Pmode, base, INTVAL (orig)); |
80d725d7 | 736 | else |
37ec5024 | 737 | result = gen_rtx_PLUS (Pmode, base, orig); |
80d725d7 | 738 | |
80d725d7 | 739 | if (MACHOPIC_JUST_INDIRECT && GET_CODE (base) == MEM) |
740 | { | |
741 | if (reg) | |
742 | { | |
743 | emit_move_insn (reg, result); | |
744 | result = reg; | |
745 | } | |
746 | else | |
747 | { | |
748 | result = force_reg (GET_MODE (result), result); | |
749 | } | |
750 | } | |
751 | ||
752 | return result; | |
80d725d7 | 753 | } |
754 | return ptr_ref; | |
755 | } | |
756 | ||
80d725d7 | 757 | /* Transform TARGET (a MEM), which is a function call target, to the |
758 | corresponding symbol_stub if necessary. Return a new MEM. */ | |
759 | ||
760 | rtx | |
b40da9a7 | 761 | machopic_indirect_call_target (rtx target) |
80d725d7 | 762 | { |
3cf7ab3b | 763 | if (! darwin_emit_branch_islands) |
764 | return target; | |
765 | ||
80d725d7 | 766 | if (GET_CODE (target) != MEM) |
767 | return target; | |
768 | ||
b215c058 | 769 | if (MACHOPIC_INDIRECT |
ab06d2ff | 770 | && GET_CODE (XEXP (target, 0)) == SYMBOL_REF |
771 | && !(SYMBOL_REF_FLAGS (XEXP (target, 0)) | |
772 | & MACHO_SYMBOL_FLAG_DEFINED)) | |
b40da9a7 | 773 | { |
ab06d2ff | 774 | rtx sym_ref = XEXP (target, 0); |
b215c058 | 775 | const char *stub_name = machopic_indirection_name (sym_ref, |
ab06d2ff | 776 | /*stub_p=*/true); |
777 | enum machine_mode mode = GET_MODE (sym_ref); | |
b215c058 | 778 | |
ab06d2ff | 779 | XEXP (target, 0) = gen_rtx_SYMBOL_REF (mode, stub_name); |
7c266bb1 | 780 | SYMBOL_REF_DATA (XEXP (target, 0)) = SYMBOL_REF_DATA (sym_ref); |
b04fab2a | 781 | MEM_READONLY_P (target) = 1; |
e265a6da | 782 | MEM_NOTRAP_P (target) = 1; |
80d725d7 | 783 | } |
784 | ||
785 | return target; | |
786 | } | |
787 | ||
788 | rtx | |
b40da9a7 | 789 | machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg) |
80d725d7 | 790 | { |
791 | rtx pic_ref = orig; | |
792 | ||
8f74ae7b | 793 | if (! MACHOPIC_INDIRECT) |
80d725d7 | 794 | return orig; |
795 | ||
796 | /* First handle a simple SYMBOL_REF or LABEL_REF */ | |
797 | if (GET_CODE (orig) == LABEL_REF | |
798 | || (GET_CODE (orig) == SYMBOL_REF | |
799 | )) | |
800 | { | |
801 | /* addr(foo) = &func+(foo-func) */ | |
80d725d7 | 802 | orig = machopic_indirect_data_reference (orig, reg); |
803 | ||
b40da9a7 | 804 | if (GET_CODE (orig) == PLUS |
80d725d7 | 805 | && GET_CODE (XEXP (orig, 0)) == REG) |
806 | { | |
807 | if (reg == 0) | |
808 | return force_reg (mode, orig); | |
809 | ||
810 | emit_move_insn (reg, orig); | |
811 | return reg; | |
b40da9a7 | 812 | } |
80d725d7 | 813 | |
80d725d7 | 814 | if (GET_CODE (orig) == MEM) |
815 | { | |
816 | if (reg == 0) | |
817 | { | |
27d2baef | 818 | gcc_assert (!reload_in_progress); |
819 | reg = gen_reg_rtx (Pmode); | |
80d725d7 | 820 | } |
b40da9a7 | 821 | |
90ff10b3 | 822 | #if HAVE_lo_sum |
8f74ae7b | 823 | if (MACHO_DYNAMIC_NO_PIC_P |
824 | && (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
825 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF)) | |
826 | { | |
827 | #if defined (TARGET_TOC) /* ppc */ | |
e1ba4a27 | 828 | rtx temp_reg = (!can_create_pseudo_p () |
829 | ? reg : | |
830 | gen_reg_rtx (Pmode)); | |
8f74ae7b | 831 | rtx asym = XEXP (orig, 0); |
832 | rtx mem; | |
833 | ||
301a5e52 | 834 | emit_insn (gen_macho_high (temp_reg, asym)); |
e265a6da | 835 | mem = gen_const_mem (GET_MODE (orig), |
3b4a645f | 836 | gen_rtx_LO_SUM (Pmode, temp_reg, |
837 | copy_rtx (asym))); | |
37ec5024 | 838 | emit_insn (gen_rtx_SET (VOIDmode, reg, mem)); |
8f74ae7b | 839 | #else |
c4f8e01f | 840 | /* Some other CPU -- WriteMe! but right now there are no other |
841 | platforms that can use dynamic-no-pic */ | |
27d2baef | 842 | gcc_unreachable (); |
8f74ae7b | 843 | #endif |
844 | pic_ref = reg; | |
845 | } | |
846 | else | |
b40da9a7 | 847 | if (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF |
80d725d7 | 848 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) |
849 | { | |
a914e728 | 850 | rtx offset = machopic_gen_offset (XEXP (orig, 0)); |
80d725d7 | 851 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
852 | /* Generating a new reg may expose opportunities for | |
853 | common subexpression elimination. */ | |
e1ba4a27 | 854 | rtx hi_sum_reg = (!can_create_pseudo_p () |
855 | ? reg | |
856 | : gen_reg_rtx (Pmode)); | |
37ec5024 | 857 | rtx mem; |
858 | rtx insn; | |
859 | rtx sum; | |
b215c058 | 860 | |
37ec5024 | 861 | sum = gen_rtx_HIGH (Pmode, offset); |
862 | if (! MACHO_DYNAMIC_NO_PIC_P) | |
863 | sum = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, sum); | |
80d725d7 | 864 | |
37ec5024 | 865 | emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, sum)); |
866 | ||
e265a6da | 867 | mem = gen_const_mem (GET_MODE (orig), |
b215c058 | 868 | gen_rtx_LO_SUM (Pmode, |
3b4a645f | 869 | hi_sum_reg, |
870 | copy_rtx (offset))); | |
37ec5024 | 871 | insn = emit_insn (gen_rtx_SET (VOIDmode, reg, mem)); |
24153880 | 872 | set_unique_reg_note (insn, REG_EQUAL, pic_ref); |
37ec5024 | 873 | |
874 | pic_ref = reg; | |
80d725d7 | 875 | #else |
18b42941 | 876 | emit_use (gen_rtx_REG (Pmode, PIC_OFFSET_TABLE_REGNUM)); |
37ec5024 | 877 | |
878 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
879 | gen_rtx_HIGH (Pmode, | |
b215c058 | 880 | gen_rtx_CONST (Pmode, |
37ec5024 | 881 | offset)))); |
882 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
883 | gen_rtx_LO_SUM (Pmode, reg, | |
3b4a645f | 884 | gen_rtx_CONST (Pmode, |
885 | copy_rtx (offset))))); | |
37ec5024 | 886 | pic_ref = gen_rtx_PLUS (Pmode, |
887 | pic_offset_table_rtx, reg); | |
80d725d7 | 888 | #endif |
889 | } | |
890 | else | |
891 | #endif /* HAVE_lo_sum */ | |
892 | { | |
893 | rtx pic = pic_offset_table_rtx; | |
894 | if (GET_CODE (pic) != REG) | |
895 | { | |
896 | emit_move_insn (reg, pic); | |
897 | pic = reg; | |
898 | } | |
899 | #if 0 | |
18b42941 | 900 | emit_use (gen_rtx_REG (Pmode, PIC_OFFSET_TABLE_REGNUM)); |
80d725d7 | 901 | #endif |
902 | ||
3e111a71 | 903 | if (reload_in_progress) |
3072d30e | 904 | df_set_regs_ever_live (REGNO (pic), true); |
b06a3cc3 | 905 | pic_ref = gen_rtx_PLUS (Pmode, pic, |
a914e728 | 906 | machopic_gen_offset (XEXP (orig, 0))); |
80d725d7 | 907 | } |
b40da9a7 | 908 | |
80d725d7 | 909 | #if !defined (TARGET_TOC) |
80d725d7 | 910 | emit_move_insn (reg, pic_ref); |
e265a6da | 911 | pic_ref = gen_const_mem (GET_MODE (orig), reg); |
7ba97778 | 912 | #endif |
80d725d7 | 913 | } |
914 | else | |
915 | { | |
916 | ||
90ff10b3 | 917 | #if HAVE_lo_sum |
b40da9a7 | 918 | if (GET_CODE (orig) == SYMBOL_REF |
80d725d7 | 919 | || GET_CODE (orig) == LABEL_REF) |
920 | { | |
a914e728 | 921 | rtx offset = machopic_gen_offset (orig); |
80d725d7 | 922 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
923 | rtx hi_sum_reg; | |
924 | ||
925 | if (reg == 0) | |
926 | { | |
27d2baef | 927 | gcc_assert (!reload_in_progress); |
928 | reg = gen_reg_rtx (Pmode); | |
80d725d7 | 929 | } |
b40da9a7 | 930 | |
80d725d7 | 931 | hi_sum_reg = reg; |
932 | ||
37ec5024 | 933 | emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, |
934 | (MACHO_DYNAMIC_NO_PIC_P) | |
935 | ? gen_rtx_HIGH (Pmode, offset) | |
936 | : gen_rtx_PLUS (Pmode, | |
937 | pic_offset_table_rtx, | |
b215c058 | 938 | gen_rtx_HIGH (Pmode, |
37ec5024 | 939 | offset)))); |
940 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
941 | gen_rtx_LO_SUM (Pmode, | |
3b4a645f | 942 | hi_sum_reg, |
943 | copy_rtx (offset)))); | |
80d725d7 | 944 | pic_ref = reg; |
945 | #else | |
37ec5024 | 946 | emit_insn (gen_rtx_SET (VOIDmode, reg, |
947 | gen_rtx_HIGH (Pmode, offset))); | |
948 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
3b4a645f | 949 | gen_rtx_LO_SUM (Pmode, reg, |
950 | copy_rtx (offset)))); | |
37ec5024 | 951 | pic_ref = gen_rtx_PLUS (Pmode, |
952 | pic_offset_table_rtx, reg); | |
80d725d7 | 953 | #endif |
954 | } | |
955 | else | |
956 | #endif /* HAVE_lo_sum */ | |
957 | { | |
7a5893fc | 958 | if (REG_P (orig) |
959 | || GET_CODE (orig) == SUBREG) | |
80d725d7 | 960 | { |
961 | return orig; | |
962 | } | |
963 | else | |
964 | { | |
965 | rtx pic = pic_offset_table_rtx; | |
966 | if (GET_CODE (pic) != REG) | |
967 | { | |
968 | emit_move_insn (reg, pic); | |
969 | pic = reg; | |
970 | } | |
971 | #if 0 | |
18b42941 | 972 | emit_use (pic_offset_table_rtx); |
80d725d7 | 973 | #endif |
3e111a71 | 974 | if (reload_in_progress) |
3072d30e | 975 | df_set_regs_ever_live (REGNO (pic), true); |
37ec5024 | 976 | pic_ref = gen_rtx_PLUS (Pmode, |
977 | pic, | |
a914e728 | 978 | machopic_gen_offset (orig)); |
80d725d7 | 979 | } |
980 | } | |
981 | } | |
982 | ||
80d725d7 | 983 | if (GET_CODE (pic_ref) != REG) |
984 | { | |
985 | if (reg != 0) | |
986 | { | |
987 | emit_move_insn (reg, pic_ref); | |
988 | return reg; | |
989 | } | |
990 | else | |
991 | { | |
992 | return force_reg (mode, pic_ref); | |
993 | } | |
994 | } | |
995 | else | |
996 | { | |
997 | return pic_ref; | |
998 | } | |
999 | } | |
1000 | ||
1001 | else if (GET_CODE (orig) == SYMBOL_REF) | |
1002 | return orig; | |
1003 | ||
1004 | else if (GET_CODE (orig) == PLUS | |
1005 | && (GET_CODE (XEXP (orig, 0)) == MEM | |
1006 | || GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
1007 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) | |
1008 | && XEXP (orig, 0) != pic_offset_table_rtx | |
1009 | && GET_CODE (XEXP (orig, 1)) != REG) | |
b40da9a7 | 1010 | |
80d725d7 | 1011 | { |
1012 | rtx base; | |
1013 | int is_complex = (GET_CODE (XEXP (orig, 0)) == MEM); | |
1014 | ||
1015 | base = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
1016 | orig = machopic_legitimize_pic_address (XEXP (orig, 1), | |
1017 | Pmode, (base == reg ? 0 : reg)); | |
1018 | if (GET_CODE (orig) == CONST_INT) | |
1019 | { | |
29c05e22 | 1020 | pic_ref = plus_constant (Pmode, base, INTVAL (orig)); |
80d725d7 | 1021 | is_complex = 1; |
1022 | } | |
1023 | else | |
37ec5024 | 1024 | pic_ref = gen_rtx_PLUS (Pmode, base, orig); |
80d725d7 | 1025 | |
80d725d7 | 1026 | if (reg && is_complex) |
1027 | { | |
1028 | emit_move_insn (reg, pic_ref); | |
1029 | pic_ref = reg; | |
1030 | } | |
1031 | /* Likewise, should we set special REG_NOTEs here? */ | |
1032 | } | |
1033 | ||
1034 | else if (GET_CODE (orig) == CONST) | |
1035 | { | |
1036 | return machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
1037 | } | |
1038 | ||
1039 | else if (GET_CODE (orig) == MEM | |
1040 | && GET_CODE (XEXP (orig, 0)) == SYMBOL_REF) | |
1041 | { | |
1042 | rtx addr = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
b04fab2a | 1043 | addr = replace_equiv_address (orig, addr); |
80d725d7 | 1044 | emit_move_insn (reg, addr); |
1045 | pic_ref = reg; | |
1046 | } | |
1047 | ||
1048 | return pic_ref; | |
1049 | } | |
1050 | ||
ab06d2ff | 1051 | /* Output the stub or non-lazy pointer in *SLOT, if it has been used. |
1052 | DATA is the FILE* for assembly output. Called from | |
1053 | htab_traverse. */ | |
80d725d7 | 1054 | |
ab06d2ff | 1055 | static int |
1056 | machopic_output_indirection (void **slot, void *data) | |
80d725d7 | 1057 | { |
ab06d2ff | 1058 | machopic_indirection *p = *((machopic_indirection **) slot); |
1059 | FILE *asm_out_file = (FILE *) data; | |
1060 | rtx symbol; | |
1061 | const char *sym_name; | |
1062 | const char *ptr_name; | |
b215c058 | 1063 | |
ab06d2ff | 1064 | if (!p->used) |
1065 | return 1; | |
80d725d7 | 1066 | |
ab06d2ff | 1067 | symbol = p->symbol; |
1068 | sym_name = XSTR (symbol, 0); | |
6d3abfc0 | 1069 | ptr_name = p->ptr_name; |
b215c058 | 1070 | |
ab06d2ff | 1071 | if (p->stub_p) |
80d725d7 | 1072 | { |
80d725d7 | 1073 | char *sym; |
1074 | char *stub; | |
b359164b | 1075 | tree id; |
1076 | ||
1077 | id = maybe_get_identifier (sym_name); | |
1078 | if (id) | |
1079 | { | |
1080 | tree id_orig = id; | |
1081 | ||
1082 | while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
1083 | id = TREE_CHAIN (id); | |
1084 | if (id != id_orig) | |
1085 | sym_name = IDENTIFIER_POINTER (id); | |
1086 | } | |
80d725d7 | 1087 | |
225ab426 | 1088 | sym = XALLOCAVEC (char, strlen (sym_name) + 2); |
80d725d7 | 1089 | if (sym_name[0] == '*' || sym_name[0] == '&') |
1090 | strcpy (sym, sym_name + 1); | |
1091 | else if (sym_name[0] == '-' || sym_name[0] == '+') | |
b40da9a7 | 1092 | strcpy (sym, sym_name); |
80d725d7 | 1093 | else |
e9764bbb | 1094 | sprintf (sym, "%s%s", user_label_prefix, sym_name); |
80d725d7 | 1095 | |
225ab426 | 1096 | stub = XALLOCAVEC (char, strlen (ptr_name) + 2); |
ab06d2ff | 1097 | if (ptr_name[0] == '*' || ptr_name[0] == '&') |
1098 | strcpy (stub, ptr_name + 1); | |
80d725d7 | 1099 | else |
ab06d2ff | 1100 | sprintf (stub, "%s%s", user_label_prefix, ptr_name); |
80d725d7 | 1101 | |
09e39ca0 | 1102 | machopic_output_stub (asm_out_file, sym, stub); |
80d725d7 | 1103 | } |
f0ed0e8a | 1104 | else if (! indirect_data (symbol) |
8d806159 | 1105 | && (machopic_symbol_defined_p (symbol) |
1106 | || SYMBOL_REF_LOCAL_P (symbol))) | |
80d725d7 | 1107 | { |
2f14b1f9 | 1108 | switch_to_section (data_section); |
ab06d2ff | 1109 | assemble_align (GET_MODE_ALIGNMENT (Pmode)); |
427eb138 | 1110 | assemble_label (asm_out_file, ptr_name); |
ab06d2ff | 1111 | assemble_integer (gen_rtx_SYMBOL_REF (Pmode, sym_name), |
1112 | GET_MODE_SIZE (Pmode), | |
1113 | GET_MODE_ALIGNMENT (Pmode), 1); | |
80d725d7 | 1114 | } |
ab06d2ff | 1115 | else |
1116 | { | |
f0ed0e8a | 1117 | rtx init = const0_rtx; |
1118 | ||
92e4ba7d | 1119 | switch_to_section (darwin_sections[machopic_nl_symbol_ptr_section]); |
cd186228 | 1120 | |
1121 | /* Mach-O symbols are passed around in code through indirect | |
1122 | references and the original symbol_ref hasn't passed through | |
1123 | the generic handling and reference-catching in | |
1124 | output_operand, so we need to manually mark weak references | |
1125 | as such. */ | |
1126 | if (SYMBOL_REF_WEAK (symbol)) | |
1127 | { | |
1128 | tree decl = SYMBOL_REF_DECL (symbol); | |
1129 | gcc_assert (DECL_P (decl)); | |
1130 | ||
1131 | if (decl != NULL_TREE | |
1132 | && DECL_EXTERNAL (decl) && TREE_PUBLIC (decl) | |
1133 | /* Handle only actual external-only definitions, not | |
1134 | e.g. extern inline code or variables for which | |
1135 | storage has been allocated. */ | |
1136 | && !TREE_STATIC (decl)) | |
1137 | { | |
1138 | fputs ("\t.weak_reference ", asm_out_file); | |
1139 | assemble_name (asm_out_file, sym_name); | |
1140 | fputc ('\n', asm_out_file); | |
1141 | } | |
1142 | } | |
1143 | ||
ab06d2ff | 1144 | assemble_name (asm_out_file, ptr_name); |
1145 | fprintf (asm_out_file, ":\n"); | |
b215c058 | 1146 | |
ab06d2ff | 1147 | fprintf (asm_out_file, "\t.indirect_symbol "); |
1148 | assemble_name (asm_out_file, sym_name); | |
1149 | fprintf (asm_out_file, "\n"); | |
b215c058 | 1150 | |
f0ed0e8a | 1151 | /* Variables that are marked with MACHO_SYMBOL_STATIC need to |
1152 | have their symbol name instead of 0 in the second entry of | |
1153 | the non-lazy symbol pointer data structure when they are | |
1154 | defined. This allows the runtime to rebind newer instances | |
1155 | of the translation unit with the original instance of the | |
d188633a | 1156 | symbol. */ |
f0ed0e8a | 1157 | |
1158 | if ((SYMBOL_REF_FLAGS (symbol) & MACHO_SYMBOL_STATIC) | |
1159 | && machopic_symbol_defined_p (symbol)) | |
1160 | init = gen_rtx_SYMBOL_REF (Pmode, sym_name); | |
1161 | ||
1162 | assemble_integer (init, GET_MODE_SIZE (Pmode), | |
ab06d2ff | 1163 | GET_MODE_ALIGNMENT (Pmode), 1); |
1164 | } | |
b215c058 | 1165 | |
ab06d2ff | 1166 | return 1; |
1167 | } | |
1168 | ||
1169 | void | |
1170 | machopic_finish (FILE *asm_out_file) | |
1171 | { | |
1172 | if (machopic_indirections) | |
f0ed0e8a | 1173 | htab_traverse_noresize (machopic_indirections, |
ab06d2ff | 1174 | machopic_output_indirection, |
1175 | asm_out_file); | |
80d725d7 | 1176 | } |
1177 | ||
b40da9a7 | 1178 | int |
1179 | machopic_operand_p (rtx op) | |
80d725d7 | 1180 | { |
1181 | if (MACHOPIC_JUST_INDIRECT) | |
a914e728 | 1182 | return (GET_CODE (op) == SYMBOL_REF |
1183 | && machopic_symbol_defined_p (op)); | |
1184 | else | |
1185 | return (GET_CODE (op) == CONST | |
1186 | && GET_CODE (XEXP (op, 0)) == UNSPEC | |
1187 | && XINT (XEXP (op, 0), 1) == UNSPEC_MACHOPIC_OFFSET); | |
80d725d7 | 1188 | } |
8dfaa51b | 1189 | |
1190 | /* This function records whether a given name corresponds to a defined | |
1191 | or undefined function or variable, for machopic_classify_ident to | |
1192 | use later. */ | |
1193 | ||
1194 | void | |
b40da9a7 | 1195 | darwin_encode_section_info (tree decl, rtx rtl, int first ATTRIBUTE_UNUSED) |
8dfaa51b | 1196 | { |
5a121a91 | 1197 | rtx sym_ref; |
8dfaa51b | 1198 | |
9af9a32c | 1199 | /* Do the standard encoding things first. */ |
1200 | default_encode_section_info (decl, rtl, first); | |
1201 | ||
ab06d2ff | 1202 | if (TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL) |
1203 | return; | |
9af9a32c | 1204 | |
ab06d2ff | 1205 | sym_ref = XEXP (rtl, 0); |
1206 | if (TREE_CODE (decl) == VAR_DECL) | |
1207 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_VARIABLE; | |
1208 | ||
1209 | if (!DECL_EXTERNAL (decl) | |
1dc74225 | 1210 | && (!TREE_PUBLIC (decl) || !DECL_WEAK (decl)) |
0a3ecdc1 | 1211 | && ! lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)) |
8dfaa51b | 1212 | && ((TREE_STATIC (decl) |
1213 | && (!DECL_COMMON (decl) || !TREE_PUBLIC (decl))) | |
2f4fae92 | 1214 | || (!DECL_COMMON (decl) && DECL_INITIAL (decl) |
fd419242 | 1215 | && DECL_INITIAL (decl) != error_mark_node))) |
ab06d2ff | 1216 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; |
f0ed0e8a | 1217 | |
d188633a | 1218 | if (! TREE_PUBLIC (decl)) |
f0ed0e8a | 1219 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_STATIC; |
e479d0de | 1220 | } |
01d15dc5 | 1221 | |
9423c9b7 | 1222 | void |
1223 | darwin_mark_decl_preserved (const char *name) | |
1224 | { | |
163c9fff | 1225 | fprintf (asm_out_file, "\t.no_dead_strip "); |
9423c9b7 | 1226 | assemble_name (asm_out_file, name); |
1227 | fputc ('\n', asm_out_file); | |
1228 | } | |
1229 | ||
50e6797e | 1230 | static section * |
8e79e9d4 | 1231 | darwin_rodata_section (int weak, bool zsize) |
50e6797e | 1232 | { |
1233 | return (weak | |
1234 | ? darwin_sections[const_coal_section] | |
8e79e9d4 | 1235 | : (zsize ? darwin_sections[zobj_const_section] |
1236 | : darwin_sections[const_section])); | |
50e6797e | 1237 | } |
b40da9a7 | 1238 | |
50e6797e | 1239 | static section * |
1240 | darwin_mergeable_string_section (tree exp, | |
1241 | unsigned HOST_WIDE_INT align) | |
1242 | { | |
1991f4fd | 1243 | /* Darwin's ld expects to see non-writable string literals in the .cstring |
1244 | section. Later versions of ld check and complain when CFStrings are | |
1245 | enabled. Therefore we shall force the strings into .cstring since we | |
1246 | don't support writable ones anyway. */ | |
1247 | if ((darwin_constant_cfstrings || flag_merge_constants) | |
50e6797e | 1248 | && TREE_CODE (exp) == STRING_CST |
1249 | && TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE | |
1250 | && align <= 256 | |
a7df40d7 | 1251 | && (int_size_in_bytes (TREE_TYPE (exp)) |
1252 | == TREE_STRING_LENGTH (exp)) | |
b40da9a7 | 1253 | && ((size_t) TREE_STRING_LENGTH (exp) |
a814bad5 | 1254 | == strlen (TREE_STRING_POINTER (exp)) + 1)) |
92e4ba7d | 1255 | return darwin_sections[cstring_section]; |
50e6797e | 1256 | |
8e79e9d4 | 1257 | if (DARWIN_SECTION_ANCHORS && flag_section_anchors |
1258 | && TREE_CODE (exp) == STRING_CST | |
1259 | && TREE_STRING_LENGTH (exp) == 0) | |
1260 | return darwin_sections[zobj_const_section]; | |
1261 | ||
50e6797e | 1262 | return readonly_data_section; |
1263 | } | |
1264 | ||
4be92808 | 1265 | #ifndef HAVE_GAS_LITERAL16 |
1266 | #define HAVE_GAS_LITERAL16 0 | |
1267 | #endif | |
1268 | ||
50e6797e | 1269 | static section * |
1270 | darwin_mergeable_constant_section (tree exp, | |
8e79e9d4 | 1271 | unsigned HOST_WIDE_INT align, |
1272 | bool zsize) | |
50e6797e | 1273 | { |
1274 | enum machine_mode mode = DECL_MODE (exp); | |
1275 | unsigned int modesize = GET_MODE_BITSIZE (mode); | |
1276 | ||
8e79e9d4 | 1277 | if (DARWIN_SECTION_ANCHORS |
1278 | && flag_section_anchors | |
1279 | && zsize) | |
1280 | return darwin_sections[zobj_const_section]; | |
1281 | ||
50e6797e | 1282 | if (flag_merge_constants |
1283 | && mode != VOIDmode | |
1284 | && mode != BLKmode | |
1285 | && modesize <= align | |
1286 | && align >= 8 | |
1287 | && align <= 256 | |
1288 | && (align & (align -1)) == 0) | |
52470889 | 1289 | { |
853b103d | 1290 | tree size = TYPE_SIZE_UNIT (TREE_TYPE (exp)); |
52470889 | 1291 | |
50e6797e | 1292 | if (TREE_CODE (size) == INTEGER_CST |
1293 | && TREE_INT_CST_LOW (size) == 4 | |
1294 | && TREE_INT_CST_HIGH (size) == 0) | |
1295 | return darwin_sections[literal4_section]; | |
1296 | else if (TREE_CODE (size) == INTEGER_CST | |
1297 | && TREE_INT_CST_LOW (size) == 8 | |
3ebc7dec | 1298 | && TREE_INT_CST_HIGH (size) == 0) |
50e6797e | 1299 | return darwin_sections[literal8_section]; |
4be92808 | 1300 | else if (HAVE_GAS_LITERAL16 |
1301 | && TARGET_64BIT | |
50e6797e | 1302 | && TREE_CODE (size) == INTEGER_CST |
1303 | && TREE_INT_CST_LOW (size) == 16 | |
1304 | && TREE_INT_CST_HIGH (size) == 0) | |
1305 | return darwin_sections[literal16_section]; | |
1306 | else | |
1307 | return readonly_data_section; | |
1308 | } | |
1309 | ||
1310 | return readonly_data_section; | |
1311 | } | |
1312 | ||
e3ef604c | 1313 | section * |
1314 | darwin_tm_clone_table_section (void) | |
1315 | { | |
1316 | return get_named_section (NULL, | |
1317 | "__DATA,__tm_clone_table,regular,no_dead_strip", | |
1318 | 3); | |
1319 | } | |
1320 | ||
0b769e4a | 1321 | int |
1322 | machopic_reloc_rw_mask (void) | |
1323 | { | |
1324 | return MACHOPIC_INDIRECT ? 3 : 0; | |
1325 | } | |
1326 | ||
267785bc | 1327 | /* We have to deal with ObjC/C++ metadata section placement in the common |
1328 | code, since it will also be called from LTO. | |
1329 | ||
1330 | Return metadata attributes, if present (searching for ABI=2 first) | |
1331 | Return NULL_TREE if no such attributes are found. */ | |
1332 | ||
1333 | static tree | |
1334 | is_objc_metadata (tree decl) | |
1335 | { | |
1336 | if (DECL_P (decl) | |
1337 | && (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == CONST_DECL) | |
1338 | && DECL_ATTRIBUTES (decl)) | |
1339 | { | |
1340 | tree meta = lookup_attribute ("OBJC2META", DECL_ATTRIBUTES (decl)); | |
1341 | if (meta) | |
1342 | return meta; | |
1343 | meta = lookup_attribute ("OBJC1META", DECL_ATTRIBUTES (decl)); | |
1344 | if (meta) | |
1345 | return meta; | |
1346 | } | |
1347 | return NULL_TREE; | |
1348 | } | |
1349 | ||
236ce1d1 | 1350 | static int classes_seen; |
1351 | static int objc_metadata_seen; | |
1352 | ||
267785bc | 1353 | /* Return the section required for Objective C ABI 2 metadata. */ |
1354 | static section * | |
1355 | darwin_objc2_section (tree decl ATTRIBUTE_UNUSED, tree meta, section * base) | |
1356 | { | |
1357 | const char *p; | |
1358 | tree ident = TREE_VALUE (meta); | |
1359 | gcc_assert (TREE_CODE (ident) == IDENTIFIER_NODE); | |
1360 | p = IDENTIFIER_POINTER (ident); | |
1361 | ||
236ce1d1 | 1362 | gcc_checking_assert (flag_next_runtime == 1 && flag_objc_abi == 2); |
267785bc | 1363 | |
236ce1d1 | 1364 | objc_metadata_seen = 1; |
267785bc | 1365 | |
1366 | if (base == data_section) | |
1367 | base = darwin_sections[objc2_metadata_section]; | |
1368 | ||
1369 | /* Most of the OBJC2 META-data end up in the base section, so check it | |
1370 | first. */ | |
1371 | if (!strncmp (p, "V2_BASE", 7)) | |
1372 | return base; | |
1373 | else if (!strncmp (p, "V2_STRG", 7)) | |
1374 | return darwin_sections[cstring_section]; | |
1375 | ||
1376 | else if (!strncmp (p, "G2_META", 7) || !strncmp (p, "G2_CLAS", 7)) | |
1377 | return darwin_sections[objc2_classdefs_section]; | |
1378 | else if (!strncmp (p, "V2_MREF", 7)) | |
1379 | return darwin_sections[objc2_message_refs_section]; | |
1380 | else if (!strncmp (p, "V2_CLRF", 7)) | |
1381 | return darwin_sections[objc2_classrefs_section]; | |
1382 | else if (!strncmp (p, "V2_SURF", 7)) | |
1383 | return darwin_sections[objc2_super_classrefs_section]; | |
1384 | else if (!strncmp (p, "V2_NLCL", 7)) | |
1385 | return darwin_sections[objc2_nonlazy_class_section]; | |
1386 | else if (!strncmp (p, "V2_CLAB", 7)) | |
236ce1d1 | 1387 | { |
1388 | classes_seen = 1; | |
1389 | return darwin_sections[objc2_classlist_section]; | |
1390 | } | |
267785bc | 1391 | else if (!strncmp (p, "V2_SRFS", 7)) |
1392 | return darwin_sections[objc2_selector_refs_section]; | |
1393 | else if (!strncmp (p, "V2_NLCA", 7)) | |
1394 | return darwin_sections[objc2_nonlazy_category_section]; | |
1395 | else if (!strncmp (p, "V2_CALA", 7)) | |
1396 | return darwin_sections[objc2_categorylist_section]; | |
1397 | ||
1398 | else if (!strncmp (p, "V2_PLST", 7)) | |
1399 | return darwin_sections[objc2_protocollist_section]; | |
1400 | else if (!strncmp (p, "V2_PRFS", 7)) | |
1401 | return darwin_sections[objc2_protocolrefs_section]; | |
1402 | ||
1403 | else if (!strncmp (p, "V2_INFO", 7)) | |
1404 | return darwin_sections[objc2_image_info_section]; | |
1405 | ||
1406 | else if (!strncmp (p, "V2_EHTY", 7)) | |
1407 | return darwin_sections[data_coal_section]; | |
1408 | ||
1409 | else if (!strncmp (p, "V2_CSTR", 7)) | |
1410 | return darwin_sections[objc2_constant_string_object_section]; | |
1411 | ||
1412 | /* Not recognized, default. */ | |
1413 | return base; | |
1414 | } | |
1415 | ||
1416 | /* Return the section required for Objective C ABI 0/1 metadata. */ | |
1417 | static section * | |
1418 | darwin_objc1_section (tree decl ATTRIBUTE_UNUSED, tree meta, section * base) | |
1419 | { | |
1420 | const char *p; | |
1421 | tree ident = TREE_VALUE (meta); | |
1422 | gcc_assert (TREE_CODE (ident) == IDENTIFIER_NODE); | |
1423 | p = IDENTIFIER_POINTER (ident); | |
1424 | ||
236ce1d1 | 1425 | gcc_checking_assert (flag_next_runtime == 1 && flag_objc_abi < 2); |
1426 | ||
1427 | objc_metadata_seen = 1; | |
267785bc | 1428 | |
1429 | /* String sections first, cos there are lots of strings. */ | |
1430 | if (!strncmp (p, "V1_STRG", 7)) | |
1431 | return darwin_sections[cstring_section]; | |
1432 | else if (!strncmp (p, "V1_CLSN", 7)) | |
1433 | return darwin_sections[objc_class_names_section]; | |
1434 | else if (!strncmp (p, "V1_METN", 7)) | |
1435 | return darwin_sections[objc_meth_var_names_section]; | |
1436 | else if (!strncmp (p, "V1_METT", 7)) | |
1437 | return darwin_sections[objc_meth_var_types_section]; | |
1438 | ||
1439 | else if (!strncmp (p, "V1_CLAS", 7)) | |
236ce1d1 | 1440 | { |
1441 | classes_seen = 1; | |
1442 | return darwin_sections[objc_class_section]; | |
1443 | } | |
267785bc | 1444 | else if (!strncmp (p, "V1_META", 7)) |
1445 | return darwin_sections[objc_meta_class_section]; | |
1446 | else if (!strncmp (p, "V1_CATG", 7)) | |
1447 | return darwin_sections[objc_category_section]; | |
1448 | else if (!strncmp (p, "V1_PROT", 7)) | |
1449 | return darwin_sections[objc_protocol_section]; | |
1450 | ||
1451 | else if (!strncmp (p, "V1_CLCV", 7)) | |
1452 | return darwin_sections[objc_class_vars_section]; | |
1453 | else if (!strncmp (p, "V1_CLIV", 7)) | |
1454 | return darwin_sections[objc_instance_vars_section]; | |
1455 | ||
1456 | else if (!strncmp (p, "V1_CLCM", 7)) | |
1457 | return darwin_sections[objc_cls_meth_section]; | |
1458 | else if (!strncmp (p, "V1_CLIM", 7)) | |
1459 | return darwin_sections[objc_inst_meth_section]; | |
1460 | else if (!strncmp (p, "V1_CACM", 7)) | |
1461 | return darwin_sections[objc_cat_cls_meth_section]; | |
1462 | else if (!strncmp (p, "V1_CAIM", 7)) | |
1463 | return darwin_sections[objc_cat_inst_meth_section]; | |
1464 | else if (!strncmp (p, "V1_PNSM", 7)) | |
1465 | return darwin_sections[objc_cat_inst_meth_section]; | |
1466 | else if (!strncmp (p, "V1_PCLM", 7)) | |
1467 | return darwin_sections[objc_cat_cls_meth_section]; | |
1468 | ||
1469 | else if (!strncmp (p, "V1_CLPR", 7)) | |
1470 | return darwin_sections[objc_cat_cls_meth_section]; | |
1471 | else if (!strncmp (p, "V1_CAPR", 7)) | |
1472 | return darwin_sections[objc_category_section]; /* ??? CHECK me. */ | |
1473 | ||
1474 | else if (!strncmp (p, "V1_PRFS", 7)) | |
1475 | return darwin_sections[objc_cat_cls_meth_section]; | |
1476 | else if (!strncmp (p, "V1_CLRF", 7)) | |
1477 | return darwin_sections[objc_cls_refs_section]; | |
1478 | else if (!strncmp (p, "V1_SRFS", 7)) | |
1479 | return darwin_sections[objc_selector_refs_section]; | |
1480 | ||
1481 | else if (!strncmp (p, "V1_MODU", 7)) | |
1482 | return darwin_sections[objc_module_info_section]; | |
1483 | else if (!strncmp (p, "V1_SYMT", 7)) | |
1484 | return darwin_sections[objc_symbols_section]; | |
1485 | else if (!strncmp (p, "V1_INFO", 7)) | |
1486 | return darwin_sections[objc_image_info_section]; | |
1487 | ||
1488 | else if (!strncmp (p, "V1_PLST", 7)) | |
1489 | return darwin_sections[objc1_prop_list_section]; | |
1490 | else if (!strncmp (p, "V1_PEXT", 7)) | |
1491 | return darwin_sections[objc1_protocol_ext_section]; | |
1492 | else if (!strncmp (p, "V1_CEXT", 7)) | |
1493 | return darwin_sections[objc1_class_ext_section]; | |
1494 | ||
1495 | else if (!strncmp (p, "V2_CSTR", 7)) | |
1496 | return darwin_sections[objc_constant_string_object_section]; | |
1497 | ||
1498 | return base; | |
1499 | } | |
1500 | ||
50e6797e | 1501 | section * |
1502 | machopic_select_section (tree decl, | |
1503 | int reloc, | |
1504 | unsigned HOST_WIDE_INT align) | |
1505 | { | |
8e79e9d4 | 1506 | bool zsize, one, weak, ro; |
3b73548b | 1507 | section *base_section = NULL; |
50e6797e | 1508 | |
8e79e9d4 | 1509 | weak = (DECL_P (decl) |
1510 | && DECL_WEAK (decl) | |
1511 | && !lookup_attribute ("weak_import", DECL_ATTRIBUTES (decl))); | |
1512 | ||
1513 | zsize = (DECL_P (decl) | |
1514 | && (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == CONST_DECL) | |
6a0712d4 | 1515 | && tree_to_uhwi (DECL_SIZE_UNIT (decl)) == 0); |
8e79e9d4 | 1516 | |
1517 | one = DECL_P (decl) | |
1518 | && TREE_CODE (decl) == VAR_DECL | |
1519 | && DECL_ONE_ONLY (decl); | |
1520 | ||
1521 | ro = TREE_READONLY (decl) || TREE_CONSTANT (decl) ; | |
1522 | ||
c6134e23 | 1523 | switch (categorize_decl_for_section (decl, reloc)) |
50e6797e | 1524 | { |
1525 | case SECCAT_TEXT: | |
9e09909d | 1526 | gcc_unreachable (); |
50e6797e | 1527 | break; |
1528 | ||
1529 | case SECCAT_RODATA: | |
1530 | case SECCAT_SRODATA: | |
8e79e9d4 | 1531 | base_section = darwin_rodata_section (weak, zsize); |
50e6797e | 1532 | break; |
1533 | ||
1534 | case SECCAT_RODATA_MERGE_STR: | |
1535 | base_section = darwin_mergeable_string_section (decl, align); | |
1536 | break; | |
1537 | ||
1538 | case SECCAT_RODATA_MERGE_STR_INIT: | |
1539 | base_section = darwin_mergeable_string_section (DECL_INITIAL (decl), align); | |
1540 | break; | |
1541 | ||
1542 | case SECCAT_RODATA_MERGE_CONST: | |
8e79e9d4 | 1543 | base_section = darwin_mergeable_constant_section (decl, align, zsize); |
50e6797e | 1544 | break; |
1545 | ||
1546 | case SECCAT_DATA: | |
1547 | case SECCAT_DATA_REL: | |
1548 | case SECCAT_DATA_REL_LOCAL: | |
1549 | case SECCAT_DATA_REL_RO: | |
1550 | case SECCAT_DATA_REL_RO_LOCAL: | |
1551 | case SECCAT_SDATA: | |
1552 | case SECCAT_TDATA: | |
8e79e9d4 | 1553 | if (weak || one) |
1554 | { | |
1555 | if (ro) | |
1556 | base_section = darwin_sections[const_data_coal_section]; | |
1557 | else | |
1558 | base_section = darwin_sections[data_coal_section]; | |
1559 | } | |
1560 | else if (DARWIN_SECTION_ANCHORS | |
1561 | && flag_section_anchors | |
1562 | && zsize) | |
1563 | { | |
1564 | /* If we're doing section anchors, then punt zero-sized objects into | |
1565 | their own sections so that they don't interfere with offset | |
1566 | computation for the remaining vars. This does not need to be done | |
1567 | for stuff in mergeable sections, since these are ineligible for | |
1568 | anchors. */ | |
1569 | if (ro) | |
1570 | base_section = darwin_sections[zobj_const_data_section]; | |
1571 | else | |
1572 | base_section = darwin_sections[zobj_data_section]; | |
1573 | } | |
1574 | else if (ro) | |
1575 | base_section = darwin_sections[const_data_section]; | |
1576 | else | |
1577 | base_section = data_section; | |
1578 | break; | |
50e6797e | 1579 | case SECCAT_BSS: |
1580 | case SECCAT_SBSS: | |
1581 | case SECCAT_TBSS: | |
8e79e9d4 | 1582 | if (weak || one) |
1583 | base_section = darwin_sections[data_coal_section]; | |
52470889 | 1584 | else |
8e79e9d4 | 1585 | { |
1586 | if (!TREE_PUBLIC (decl)) | |
1587 | base_section = lcomm_section; | |
1588 | else if (bss_noswitch_section) | |
1589 | base_section = bss_noswitch_section; | |
1590 | else | |
1591 | base_section = data_section; | |
1592 | } | |
50e6797e | 1593 | break; |
1594 | ||
1595 | default: | |
1596 | gcc_unreachable (); | |
52470889 | 1597 | } |
50e6797e | 1598 | |
267785bc | 1599 | /* Darwin weird special cases. |
1600 | a) OBJC Meta-data. */ | |
1601 | if (DECL_P (decl) | |
1602 | && (TREE_CODE (decl) == VAR_DECL | |
1603 | || TREE_CODE (decl) == CONST_DECL) | |
1604 | && DECL_ATTRIBUTES (decl)) | |
1605 | { | |
1606 | tree meta = lookup_attribute ("OBJC2META", DECL_ATTRIBUTES (decl)); | |
1607 | if (meta) | |
1608 | return darwin_objc2_section (decl, meta, base_section); | |
1609 | meta = lookup_attribute ("OBJC1META", DECL_ATTRIBUTES (decl)); | |
1610 | if (meta) | |
1611 | return darwin_objc1_section (decl, meta, base_section); | |
1612 | meta = lookup_attribute ("OBJC1METG", DECL_ATTRIBUTES (decl)); | |
1613 | if (meta) | |
1614 | return base_section; /* GNU runtime is happy with it all in one pot. */ | |
1615 | } | |
1616 | ||
1617 | /* b) Constant string objects. */ | |
50e6797e | 1618 | if (TREE_CODE (decl) == CONSTRUCTOR |
1619 | && TREE_TYPE (decl) | |
1620 | && TREE_CODE (TREE_TYPE (decl)) == RECORD_TYPE | |
1621 | && TYPE_NAME (TREE_TYPE (decl))) | |
52470889 | 1622 | { |
50e6797e | 1623 | tree name = TYPE_NAME (TREE_TYPE (decl)); |
52470889 | 1624 | if (TREE_CODE (name) == TYPE_DECL) |
50e6797e | 1625 | name = DECL_NAME (name); |
0616a948 | 1626 | |
1627 | if (!strcmp (IDENTIFIER_POINTER (name), "__builtin_ObjCString")) | |
267785bc | 1628 | { |
1629 | if (flag_next_runtime) | |
1630 | { | |
1631 | if (flag_objc_abi == 2) | |
1632 | return darwin_sections[objc2_constant_string_object_section]; | |
1633 | else | |
1634 | return darwin_sections[objc_constant_string_object_section]; | |
1635 | } | |
1636 | else | |
1637 | return darwin_sections[objc_string_object_section]; | |
1638 | } | |
d4238e8b | 1639 | else if (!strcmp (IDENTIFIER_POINTER (name), "__builtin_CFString")) |
1640 | return darwin_sections[cfstring_constant_object_section]; | |
52470889 | 1641 | else |
267785bc | 1642 | return base_section; |
52470889 | 1643 | } |
267785bc | 1644 | /* c) legacy meta-data selection. */ |
50e6797e | 1645 | else if (TREE_CODE (decl) == VAR_DECL |
1646 | && DECL_NAME (decl) | |
1647 | && TREE_CODE (DECL_NAME (decl)) == IDENTIFIER_NODE | |
1648 | && IDENTIFIER_POINTER (DECL_NAME (decl)) | |
267785bc | 1649 | && flag_next_runtime |
50e6797e | 1650 | && !strncmp (IDENTIFIER_POINTER (DECL_NAME (decl)), "_OBJC_", 6)) |
52470889 | 1651 | { |
50e6797e | 1652 | const char *name = IDENTIFIER_POINTER (DECL_NAME (decl)); |
267785bc | 1653 | static bool warned_objc_46 = false; |
8e79e9d4 | 1654 | /* We shall assert that zero-sized objects are an error in ObjC |
1655 | meta-data. */ | |
6a0712d4 | 1656 | gcc_assert (tree_to_uhwi (DECL_SIZE_UNIT (decl)) != 0); |
267785bc | 1657 | |
1658 | /* ??? This mechanism for determining the metadata section is | |
1659 | broken when LTO is in use, since the frontend that generated | |
1660 | the data is not identified. We will keep the capability for | |
1661 | the short term - in case any non-Objective-C programs are using | |
1662 | it to place data in specified sections. */ | |
1663 | if (!warned_objc_46) | |
1664 | { | |
1665 | location_t loc = DECL_SOURCE_LOCATION (decl); | |
1666 | warning_at (loc, 0, "the use of _OBJC_-prefixed variable names" | |
1667 | " to select meta-data sections is deprecated at 4.6" | |
1668 | " and will be removed in 4.7"); | |
1669 | warned_objc_46 = true; | |
1670 | } | |
1671 | ||
52470889 | 1672 | if (!strncmp (name, "_OBJC_CLASS_METHODS_", 20)) |
50e6797e | 1673 | return darwin_sections[objc_cls_meth_section]; |
52470889 | 1674 | else if (!strncmp (name, "_OBJC_INSTANCE_METHODS_", 23)) |
50e6797e | 1675 | return darwin_sections[objc_inst_meth_section]; |
8e79e9d4 | 1676 | else if (!strncmp (name, "_OBJC_CATEGORY_CLASS_METHODS_", 29)) |
50e6797e | 1677 | return darwin_sections[objc_cat_cls_meth_section]; |
8e79e9d4 | 1678 | else if (!strncmp (name, "_OBJC_CATEGORY_INSTANCE_METHODS_", 32)) |
50e6797e | 1679 | return darwin_sections[objc_cat_inst_meth_section]; |
52470889 | 1680 | else if (!strncmp (name, "_OBJC_CLASS_VARIABLES_", 22)) |
50e6797e | 1681 | return darwin_sections[objc_class_vars_section]; |
52470889 | 1682 | else if (!strncmp (name, "_OBJC_INSTANCE_VARIABLES_", 25)) |
50e6797e | 1683 | return darwin_sections[objc_instance_vars_section]; |
52470889 | 1684 | else if (!strncmp (name, "_OBJC_CLASS_PROTOCOLS_", 22)) |
50e6797e | 1685 | return darwin_sections[objc_cat_cls_meth_section]; |
52470889 | 1686 | else if (!strncmp (name, "_OBJC_CLASS_NAME_", 17)) |
50e6797e | 1687 | return darwin_sections[objc_class_names_section]; |
52470889 | 1688 | else if (!strncmp (name, "_OBJC_METH_VAR_NAME_", 20)) |
50e6797e | 1689 | return darwin_sections[objc_meth_var_names_section]; |
52470889 | 1690 | else if (!strncmp (name, "_OBJC_METH_VAR_TYPE_", 20)) |
50e6797e | 1691 | return darwin_sections[objc_meth_var_types_section]; |
52470889 | 1692 | else if (!strncmp (name, "_OBJC_CLASS_REFERENCES", 22)) |
50e6797e | 1693 | return darwin_sections[objc_cls_refs_section]; |
52470889 | 1694 | else if (!strncmp (name, "_OBJC_CLASS_", 12)) |
50e6797e | 1695 | return darwin_sections[objc_class_section]; |
52470889 | 1696 | else if (!strncmp (name, "_OBJC_METACLASS_", 16)) |
50e6797e | 1697 | return darwin_sections[objc_meta_class_section]; |
52470889 | 1698 | else if (!strncmp (name, "_OBJC_CATEGORY_", 15)) |
50e6797e | 1699 | return darwin_sections[objc_category_section]; |
52470889 | 1700 | else if (!strncmp (name, "_OBJC_SELECTOR_REFERENCES", 25)) |
50e6797e | 1701 | return darwin_sections[objc_selector_refs_section]; |
52470889 | 1702 | else if (!strncmp (name, "_OBJC_SELECTOR_FIXUP", 20)) |
50e6797e | 1703 | return darwin_sections[objc_selector_fixup_section]; |
52470889 | 1704 | else if (!strncmp (name, "_OBJC_SYMBOLS", 13)) |
50e6797e | 1705 | return darwin_sections[objc_symbols_section]; |
52470889 | 1706 | else if (!strncmp (name, "_OBJC_MODULES", 13)) |
50e6797e | 1707 | return darwin_sections[objc_module_info_section]; |
c17b85ea | 1708 | else if (!strncmp (name, "_OBJC_IMAGE_INFO", 16)) |
50e6797e | 1709 | return darwin_sections[objc_image_info_section]; |
52470889 | 1710 | else if (!strncmp (name, "_OBJC_PROTOCOL_INSTANCE_METHODS_", 32)) |
50e6797e | 1711 | return darwin_sections[objc_cat_inst_meth_section]; |
52470889 | 1712 | else if (!strncmp (name, "_OBJC_PROTOCOL_CLASS_METHODS_", 29)) |
50e6797e | 1713 | return darwin_sections[objc_cat_cls_meth_section]; |
52470889 | 1714 | else if (!strncmp (name, "_OBJC_PROTOCOL_REFS_", 20)) |
50e6797e | 1715 | return darwin_sections[objc_cat_cls_meth_section]; |
52470889 | 1716 | else if (!strncmp (name, "_OBJC_PROTOCOL_", 15)) |
50e6797e | 1717 | return darwin_sections[objc_protocol_section]; |
52470889 | 1718 | else |
50e6797e | 1719 | return base_section; |
52470889 | 1720 | } |
50e6797e | 1721 | |
1722 | return base_section; | |
52470889 | 1723 | } |
1724 | ||
bbfbe351 | 1725 | /* This can be called with address expressions as "rtx". |
9cb8e99f | 1726 | They must go in "const". */ |
bbfbe351 | 1727 | |
2f14b1f9 | 1728 | section * |
b40da9a7 | 1729 | machopic_select_rtx_section (enum machine_mode mode, rtx x, |
1730 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
bbfbe351 | 1731 | { |
f2e8796e | 1732 | if (GET_MODE_SIZE (mode) == 8 |
1733 | && (GET_CODE (x) == CONST_INT | |
1734 | || GET_CODE (x) == CONST_DOUBLE)) | |
92e4ba7d | 1735 | return darwin_sections[literal8_section]; |
bbfbe351 | 1736 | else if (GET_MODE_SIZE (mode) == 4 |
1737 | && (GET_CODE (x) == CONST_INT | |
1738 | || GET_CODE (x) == CONST_DOUBLE)) | |
92e4ba7d | 1739 | return darwin_sections[literal4_section]; |
4be92808 | 1740 | else if (HAVE_GAS_LITERAL16 |
1741 | && TARGET_64BIT | |
7463cbdf | 1742 | && GET_MODE_SIZE (mode) == 16 |
3ebc7dec | 1743 | && (GET_CODE (x) == CONST_INT |
2805e80b | 1744 | || GET_CODE (x) == CONST_DOUBLE |
1745 | || GET_CODE (x) == CONST_VECTOR)) | |
3ebc7dec | 1746 | return darwin_sections[literal16_section]; |
459f8624 | 1747 | else if (MACHOPIC_INDIRECT |
76dece62 | 1748 | && (GET_CODE (x) == SYMBOL_REF |
1749 | || GET_CODE (x) == CONST | |
1750 | || GET_CODE (x) == LABEL_REF)) | |
92e4ba7d | 1751 | return darwin_sections[const_data_section]; |
bbfbe351 | 1752 | else |
92e4ba7d | 1753 | return darwin_sections[const_section]; |
bbfbe351 | 1754 | } |
1755 | ||
01d15dc5 | 1756 | void |
b40da9a7 | 1757 | machopic_asm_out_constructor (rtx symbol, int priority ATTRIBUTE_UNUSED) |
01d15dc5 | 1758 | { |
ed161dab | 1759 | cdtor_record new_elt = {symbol, priority, vec_safe_length (ctors)}; |
4b313269 | 1760 | |
1761 | vec_safe_push (ctors, new_elt); | |
1762 | ||
1763 | if (! MACHOPIC_INDIRECT) | |
1764 | fprintf (asm_out_file, ".reference .constructors_used\n"); | |
1765 | } | |
1766 | ||
ed161dab | 1767 | void |
1768 | machopic_asm_out_destructor (rtx symbol, int priority ATTRIBUTE_UNUSED) | |
1769 | { | |
1770 | cdtor_record new_elt = {symbol, priority, vec_safe_length (dtors)}; | |
1771 | ||
1772 | vec_safe_push (dtors, new_elt); | |
1773 | ||
1774 | if (! MACHOPIC_INDIRECT) | |
1775 | fprintf (asm_out_file, ".reference .destructors_used\n"); | |
1776 | } | |
1777 | ||
4b313269 | 1778 | static int |
ed161dab | 1779 | sort_cdtor_records (const void * a, const void * b) |
4b313269 | 1780 | { |
ed161dab | 1781 | const cdtor_record *cda = (const cdtor_record *)a; |
1782 | const cdtor_record *cdb = (const cdtor_record *)b; | |
1783 | if (cda->priority > cdb->priority) | |
4b313269 | 1784 | return 1; |
ed161dab | 1785 | if (cda->priority < cdb->priority) |
4b313269 | 1786 | return -1; |
ed161dab | 1787 | if (cda->position > cdb->position) |
4b313269 | 1788 | return 1; |
ed161dab | 1789 | if (cda->position < cdb->position) |
4b313269 | 1790 | return -1; |
1791 | return 0; | |
1792 | } | |
1793 | ||
1794 | static void | |
ed161dab | 1795 | finalize_ctors () |
4b313269 | 1796 | { |
1797 | unsigned int i; | |
ed161dab | 1798 | cdtor_record *elt; |
4b313269 | 1799 | |
8f74ae7b | 1800 | if (MACHOPIC_INDIRECT) |
92e4ba7d | 1801 | switch_to_section (darwin_sections[mod_init_section]); |
01d15dc5 | 1802 | else |
92e4ba7d | 1803 | switch_to_section (darwin_sections[constructor_section]); |
01d15dc5 | 1804 | |
4b313269 | 1805 | if (vec_safe_length (ctors) > 1) |
ed161dab | 1806 | ctors->qsort (sort_cdtor_records); |
4b313269 | 1807 | FOR_EACH_VEC_SAFE_ELT (ctors, i, elt) |
1808 | { | |
1809 | assemble_align (POINTER_SIZE); | |
1810 | assemble_integer (elt->symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
1811 | } | |
01d15dc5 | 1812 | } |
1813 | ||
ed161dab | 1814 | static void |
1815 | finalize_dtors () | |
01d15dc5 | 1816 | { |
ed161dab | 1817 | unsigned int i; |
1818 | cdtor_record *elt; | |
1819 | ||
8f74ae7b | 1820 | if (MACHOPIC_INDIRECT) |
92e4ba7d | 1821 | switch_to_section (darwin_sections[mod_term_section]); |
01d15dc5 | 1822 | else |
92e4ba7d | 1823 | switch_to_section (darwin_sections[destructor_section]); |
01d15dc5 | 1824 | |
ed161dab | 1825 | if (vec_safe_length (dtors) > 1) |
1826 | dtors->qsort (sort_cdtor_records); | |
1827 | FOR_EACH_VEC_SAFE_ELT (dtors, i, elt) | |
1828 | { | |
1829 | assemble_align (POINTER_SIZE); | |
1830 | assemble_integer (elt->symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
1831 | } | |
01d15dc5 | 1832 | } |
1f3233d1 | 1833 | |
67c1e638 | 1834 | void |
b40da9a7 | 1835 | darwin_globalize_label (FILE *stream, const char *name) |
67c1e638 | 1836 | { |
1837 | if (!!strncmp (name, "_OBJC_", 6)) | |
1838 | default_globalize_label (stream, name); | |
1839 | } | |
1840 | ||
32e31f06 | 1841 | /* This routine returns non-zero if 'name' starts with the special objective-c |
1842 | anonymous file-scope static name. It accommodates c++'s mangling of such | |
1843 | symbols (in this case the symbols will have form _ZL{d}*_OBJC_* d=digit). */ | |
1844 | ||
1845 | int | |
1846 | darwin_label_is_anonymous_local_objc_name (const char *name) | |
1847 | { | |
1848 | const unsigned char *p = (const unsigned char *) name; | |
1849 | if (*p != '_') | |
1850 | return 0; | |
1851 | if (p[1] == 'Z' && p[2] == 'L') | |
1852 | { | |
1853 | p += 3; | |
1854 | while (*p >= '0' && *p <= '9') | |
1855 | p++; | |
1856 | } | |
1857 | return (!strncmp ((const char *)p, "_OBJC_", 6)); | |
1858 | } | |
1859 | ||
13e2f0a0 | 1860 | /* LTO support for Mach-O. |
23433d72 | 1861 | |
13e2f0a0 | 1862 | This version uses three mach-o sections to encapsulate the (unlimited |
1863 | number of) lto sections. | |
23433d72 | 1864 | |
13e2f0a0 | 1865 | __GNU_LTO, __lto_sections contains the concatented GNU LTO section data. |
1866 | __GNU_LTO, __section_names contains the GNU LTO section names. | |
1867 | __GNU_LTO, __section_index contains an array of values that index these. | |
23433d72 | 1868 | |
13e2f0a0 | 1869 | Indexed thus: |
1870 | <section offset from the start of __GNU_LTO, __lto_sections>, | |
1871 | <section length> | |
1872 | <name offset from the start of __GNU_LTO, __section_names, | |
1873 | <name length>. | |
1874 | ||
1875 | At present, for both m32 and m64 mach-o files each of these fields is | |
1876 | represented by a uint32_t. This is because, AFAICT, a mach-o object | |
1877 | cannot exceed 4Gb because the section_64 offset field (see below) is 32bits. | |
1878 | ||
1879 | uint32_t offset; | |
1880 | "offset An integer specifying the offset to this section in the file." */ | |
1881 | ||
1882 | /* Count lto section numbers. */ | |
1883 | static unsigned int lto_section_num = 0; | |
1884 | ||
1885 | /* A vector of information about LTO sections, at present, we only have | |
1886 | the name. TODO: see if we can get the data length somehow. */ | |
1887 | typedef struct GTY (()) darwin_lto_section_e { | |
1888 | const char *sectname; | |
1889 | } darwin_lto_section_e ; | |
13e2f0a0 | 1890 | |
f1f41a6c | 1891 | static GTY (()) vec<darwin_lto_section_e, va_gc> *lto_section_names; |
13e2f0a0 | 1892 | |
1893 | /* Segment for LTO data. */ | |
23433d72 | 1894 | #define LTO_SEGMENT_NAME "__GNU_LTO" |
1895 | ||
13e2f0a0 | 1896 | /* Section wrapper scheme (used here to wrap the unlimited number of LTO |
1897 | sections into three Mach-O ones). | |
1898 | NOTE: These names MUST be kept in sync with those in | |
1899 | libiberty/simple-object-mach-o. */ | |
1900 | #define LTO_SECTS_SECTION "__wrapper_sects" | |
1901 | #define LTO_NAMES_SECTION "__wrapper_names" | |
1902 | #define LTO_INDEX_SECTION "__wrapper_index" | |
23433d72 | 1903 | |
1904 | /* File to temporarily store LTO data. This is appended to asm_out_file | |
1905 | in darwin_end_file. */ | |
1906 | static FILE *lto_asm_out_file, *saved_asm_out_file; | |
1907 | static char *lto_asm_out_name; | |
1908 | ||
1909 | /* Prepare asm_out_file for LTO output. For darwin, this means hiding | |
1910 | asm_out_file and switching to an alternative output file. */ | |
1911 | void | |
1912 | darwin_asm_lto_start (void) | |
1913 | { | |
1914 | gcc_assert (! saved_asm_out_file); | |
1915 | saved_asm_out_file = asm_out_file; | |
1916 | if (! lto_asm_out_name) | |
1917 | lto_asm_out_name = make_temp_file (".lto.s"); | |
1918 | lto_asm_out_file = fopen (lto_asm_out_name, "a"); | |
1919 | if (lto_asm_out_file == NULL) | |
1920 | fatal_error ("failed to open temporary file %s for LTO output", | |
1921 | lto_asm_out_name); | |
1922 | asm_out_file = lto_asm_out_file; | |
1923 | } | |
1924 | ||
1925 | /* Restore asm_out_file. */ | |
1926 | void | |
1927 | darwin_asm_lto_end (void) | |
1928 | { | |
1929 | gcc_assert (saved_asm_out_file); | |
1930 | fclose (lto_asm_out_file); | |
1931 | asm_out_file = saved_asm_out_file; | |
1932 | saved_asm_out_file = NULL; | |
1933 | } | |
1934 | ||
edea89b9 | 1935 | static void |
1936 | darwin_asm_dwarf_section (const char *name, unsigned int flags, tree decl); | |
1937 | ||
1938 | /* Called for the TARGET_ASM_NAMED_SECTION hook. */ | |
1939 | ||
2f9fc8ef | 1940 | void |
b215c058 | 1941 | darwin_asm_named_section (const char *name, |
23433d72 | 1942 | unsigned int flags, |
537cd941 | 1943 | tree decl ATTRIBUTE_UNUSED) |
2f9fc8ef | 1944 | { |
13e2f0a0 | 1945 | /* LTO sections go in a special section that encapsulates the (unlimited) |
1946 | number of GNU LTO sections within a single mach-o one. */ | |
23433d72 | 1947 | if (strncmp (name, LTO_SECTION_NAME_PREFIX, |
1948 | strlen (LTO_SECTION_NAME_PREFIX)) == 0) | |
1949 | { | |
13e2f0a0 | 1950 | darwin_lto_section_e e; |
23433d72 | 1951 | /* We expect certain flags to be set... */ |
1952 | gcc_assert ((flags & (SECTION_DEBUG | SECTION_NAMED)) | |
1953 | == (SECTION_DEBUG | SECTION_NAMED)); | |
1954 | ||
13e2f0a0 | 1955 | /* Switch to our combined section. */ |
1956 | fprintf (asm_out_file, "\t.section %s,%s,regular,debug\n", | |
1957 | LTO_SEGMENT_NAME, LTO_SECTS_SECTION); | |
1958 | /* Output a label for the start of this sub-section. */ | |
1959 | fprintf (asm_out_file, "L_GNU_LTO%d:\t;# %s\n", | |
1960 | lto_section_num, name); | |
1961 | /* We have to jump through hoops to get the values of the intra-section | |
1962 | offsets... */ | |
1963 | fprintf (asm_out_file, "\t.set L$gnu$lto$offs%d,L_GNU_LTO%d-L_GNU_LTO0\n", | |
1964 | lto_section_num, lto_section_num); | |
1965 | fprintf (asm_out_file, | |
1966 | "\t.set L$gnu$lto$size%d,L_GNU_LTO%d-L_GNU_LTO%d\n", | |
1967 | lto_section_num, lto_section_num+1, lto_section_num); | |
1968 | lto_section_num++; | |
1969 | e.sectname = xstrdup (name); | |
1970 | /* Keep the names, we'll need to make a table later. | |
1971 | TODO: check that we do not revisit sections, that would break | |
1972 | the assumption of how this is done. */ | |
1973 | if (lto_section_names == NULL) | |
f1f41a6c | 1974 | vec_alloc (lto_section_names, 16); |
1975 | vec_safe_push (lto_section_names, e); | |
13e2f0a0 | 1976 | } |
edea89b9 | 1977 | else if (strncmp (name, "__DWARF,", 8) == 0) |
1978 | darwin_asm_dwarf_section (name, flags, decl); | |
23433d72 | 1979 | else |
1980 | fprintf (asm_out_file, "\t.section %s\n", name); | |
2f9fc8ef | 1981 | } |
1982 | ||
b215c058 | 1983 | void |
1dc74225 | 1984 | darwin_unique_section (tree decl ATTRIBUTE_UNUSED, int reloc ATTRIBUTE_UNUSED) |
2f9fc8ef | 1985 | { |
1dc74225 | 1986 | /* Darwin does not use unique sections. */ |
2f9fc8ef | 1987 | } |
1988 | ||
5b182752 | 1989 | /* Handle __attribute__ ((apple_kext_compatibility)). |
1990 | This only applies to darwin kexts for 2.95 compatibility -- it shrinks the | |
1991 | vtable for classes with this attribute (and their descendants) by not | |
1992 | outputting the new 3.0 nondeleting destructor. This means that such | |
1993 | objects CANNOT be allocated on the stack or as globals UNLESS they have | |
1994 | a completely empty `operator delete'. | |
1995 | Luckily, this fits in with the Darwin kext model. | |
1996 | ||
1997 | This attribute also disables gcc3's potential overlaying of derived | |
1998 | class data members on the padding at the end of the base class. */ | |
1999 | ||
2000 | tree | |
2001 | darwin_handle_kext_attribute (tree *node, tree name, | |
2002 | tree args ATTRIBUTE_UNUSED, | |
2003 | int flags ATTRIBUTE_UNUSED, | |
2004 | bool *no_add_attrs) | |
2005 | { | |
2006 | /* APPLE KEXT stuff -- only applies with pure static C++ code. */ | |
2007 | if (! TARGET_KEXTABI) | |
2008 | { | |
67a779df | 2009 | warning (0, "%qE 2.95 vtable-compatibility attribute applies " |
2010 | "only when compiling a kext", name); | |
5b182752 | 2011 | |
2012 | *no_add_attrs = true; | |
2013 | } | |
2014 | else if (TREE_CODE (*node) != RECORD_TYPE) | |
2015 | { | |
67a779df | 2016 | warning (0, "%qE 2.95 vtable-compatibility attribute applies " |
2017 | "only to C++ classes", name); | |
5b182752 | 2018 | |
2019 | *no_add_attrs = true; | |
2020 | } | |
2021 | ||
2022 | return NULL_TREE; | |
2023 | } | |
2024 | ||
975d636c | 2025 | /* Handle a "weak_import" attribute; arguments as in |
2026 | struct attribute_spec.handler. */ | |
2027 | ||
2028 | tree | |
2029 | darwin_handle_weak_import_attribute (tree *node, tree name, | |
2030 | tree ARG_UNUSED (args), | |
2031 | int ARG_UNUSED (flags), | |
2032 | bool * no_add_attrs) | |
2033 | { | |
d0ddd548 | 2034 | if (TREE_CODE (*node) != FUNCTION_DECL && TREE_CODE (*node) != VAR_DECL) |
975d636c | 2035 | { |
67a779df | 2036 | warning (OPT_Wattributes, "%qE attribute ignored", |
2037 | name); | |
975d636c | 2038 | *no_add_attrs = true; |
2039 | } | |
2040 | else | |
2041 | declare_weak (*node); | |
2042 | ||
2043 | return NULL_TREE; | |
2044 | } | |
a3952a36 | 2045 | |
b215c058 | 2046 | /* Emit a label for an FDE, making it global and/or weak if appropriate. |
ef1074f7 | 2047 | The third parameter is nonzero if this is for exception handling. |
2048 | The fourth parameter is nonzero if this is just a placeholder for an | |
2f9fc8ef | 2049 | FDE that we are omitting. */ |
ef1074f7 | 2050 | |
b215c058 | 2051 | void |
ef1074f7 | 2052 | darwin_emit_unwind_label (FILE *file, tree decl, int for_eh, int empty) |
2f9fc8ef | 2053 | { |
9e09909d | 2054 | char *lab ; |
2055 | char buf[32]; | |
2056 | static int invok_count = 0; | |
2057 | static tree last_fun_decl = NULL_TREE; | |
2058 | ||
2059 | /* We use the linker to emit the .eh labels for Darwin 9 and above. */ | |
2060 | if (! for_eh || generating_for_darwin_version >= 9) | |
d08d29c0 | 2061 | return; |
2f9fc8ef | 2062 | |
9e09909d | 2063 | /* FIXME: This only works when the eh for all sections of a function is |
2064 | emitted at the same time. If that changes, we would need to use a lookup | |
2065 | table of some form to determine what to do. Also, we should emit the | |
2066 | unadorned label for the partition containing the public label for a | |
2067 | function. This is of limited use, probably, since we do not currently | |
2068 | enable partitioning. */ | |
2069 | strcpy (buf, ".eh"); | |
2070 | if (decl && TREE_CODE (decl) == FUNCTION_DECL) | |
2071 | { | |
2072 | if (decl == last_fun_decl) | |
2073 | { | |
2074 | invok_count++; | |
2075 | snprintf (buf, 31, "$$part$$%d.eh", invok_count); | |
2076 | } | |
2077 | else | |
2078 | { | |
2079 | last_fun_decl = decl; | |
2080 | invok_count = 0; | |
2081 | } | |
2082 | } | |
2083 | ||
2084 | lab = concat (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)), buf, NULL); | |
2f9fc8ef | 2085 | |
2086 | if (TREE_PUBLIC (decl)) | |
e8f535c2 | 2087 | { |
2088 | targetm.asm_out.globalize_label (file, lab); | |
2089 | if (DECL_VISIBILITY (decl) == VISIBILITY_HIDDEN) | |
2090 | { | |
2091 | fputs ("\t.private_extern ", file); | |
2092 | assemble_name (file, lab); | |
2093 | fputc ('\n', file); | |
2094 | } | |
2095 | } | |
2f9fc8ef | 2096 | |
1dc74225 | 2097 | if (DECL_WEAK (decl)) |
e8f535c2 | 2098 | { |
2099 | fputs ("\t.weak_definition ", file); | |
2100 | assemble_name (file, lab); | |
2101 | fputc ('\n', file); | |
2102 | } | |
2f9fc8ef | 2103 | |
e8f535c2 | 2104 | assemble_name (file, lab); |
2f9fc8ef | 2105 | if (empty) |
a3952a36 | 2106 | { |
e8f535c2 | 2107 | fputs (" = 0\n", file); |
a3952a36 | 2108 | |
2109 | /* Mark the absolute .eh and .eh1 style labels as needed to | |
2110 | ensure that we don't dead code strip them and keep such | |
2111 | labels from another instantiation point until we can fix this | |
2112 | properly with group comdat support. */ | |
e8f535c2 | 2113 | darwin_mark_decl_preserved (lab); |
a3952a36 | 2114 | } |
2f9fc8ef | 2115 | else |
e8f535c2 | 2116 | fputs (":\n", file); |
2f9fc8ef | 2117 | |
2118 | free (lab); | |
2119 | } | |
2120 | ||
b215c058 | 2121 | static GTY(()) unsigned long except_table_label_num; |
2122 | ||
2123 | void | |
2124 | darwin_emit_except_table_label (FILE *file) | |
2125 | { | |
2126 | char section_start_label[30]; | |
2127 | ||
2128 | ASM_GENERATE_INTERNAL_LABEL (section_start_label, "GCC_except_table", | |
2129 | except_table_label_num++); | |
2130 | ASM_OUTPUT_LABEL (file, section_start_label); | |
2131 | } | |
2132 | /* Generate a PC-relative reference to a Mach-O non-lazy-symbol. */ | |
ef1074f7 | 2133 | |
2f9fc8ef | 2134 | void |
2135 | darwin_non_lazy_pcrel (FILE *file, rtx addr) | |
2136 | { | |
2f9fc8ef | 2137 | const char *nlp_name; |
2138 | ||
27d2baef | 2139 | gcc_assert (GET_CODE (addr) == SYMBOL_REF); |
2f9fc8ef | 2140 | |
ab06d2ff | 2141 | nlp_name = machopic_indirection_name (addr, /*stub_p=*/false); |
2f9fc8ef | 2142 | fputs ("\t.long\t", file); |
2143 | ASM_OUTPUT_LABELREF (file, nlp_name); | |
2144 | fputs ("-.", file); | |
2145 | } | |
2146 | ||
8e79e9d4 | 2147 | /* If this is uncommented, details of each allocation will be printed |
2148 | in the asm right before the actual code. WARNING - this will cause some | |
2149 | test-suite fails (since the printout will contain items that some tests | |
2150 | are not expecting) -- so don't leave it on by default (it bloats the | |
2151 | asm too). */ | |
2152 | /*#define DEBUG_DARWIN_MEM_ALLOCATORS*/ | |
2153 | ||
2154 | /* The first two of these routines are ostensibly just intended to put | |
2155 | names into the asm. However, they are both hijacked in order to ensure | |
2156 | that zero-sized items do not make their way into the output. Consequently, | |
2157 | we also need to make these participate in provisions for dealing with | |
2158 | such items in section anchors. */ | |
2159 | ||
2160 | /* The implementation of ASM_DECLARE_OBJECT_NAME. */ | |
2161 | /* The RTTI data (e.g., __ti4name) is common and public (and static), | |
2162 | but it does need to be referenced via indirect PIC data pointers. | |
2163 | The machopic_define_symbol calls are telling the machopic subsystem | |
2164 | that the name *is* defined in this module, so it doesn't need to | |
2165 | make them indirect. */ | |
2166 | void | |
2167 | darwin_asm_declare_object_name (FILE *file, | |
2168 | const char *nam, tree decl) | |
2169 | { | |
2170 | const char *xname = nam; | |
2171 | unsigned HOST_WIDE_INT size; | |
2172 | bool local_def, weak; | |
2173 | ||
2174 | weak = (DECL_P (decl) | |
2175 | && DECL_WEAK (decl) | |
2176 | && !lookup_attribute ("weak_import", | |
2177 | DECL_ATTRIBUTES (decl))); | |
2178 | ||
2179 | local_def = DECL_INITIAL (decl) || (TREE_STATIC (decl) | |
2180 | && (!DECL_COMMON (decl) | |
2181 | || !TREE_PUBLIC (decl))); | |
2182 | ||
2183 | if (GET_CODE (XEXP (DECL_RTL (decl), 0)) != SYMBOL_REF) | |
2184 | xname = IDENTIFIER_POINTER (DECL_NAME (decl)); | |
2185 | ||
2186 | if (local_def) | |
2187 | { | |
2188 | (* targetm.encode_section_info) (decl, DECL_RTL (decl), false); | |
2189 | if (!weak) | |
2190 | machopic_define_symbol (DECL_RTL (decl)); | |
2191 | } | |
2192 | ||
6a0712d4 | 2193 | size = tree_to_uhwi (DECL_SIZE_UNIT (decl)); |
8e79e9d4 | 2194 | |
2195 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2196 | fprintf (file, "# dadon: %s %s (%llu, %u) local %d weak %d" | |
2197 | " stat %d com %d pub %d t-const %d t-ro %d init %lx\n", | |
2198 | xname, (TREE_CODE (decl) == VAR_DECL?"var":"const"), | |
2199 | (unsigned long long)size, DECL_ALIGN (decl), local_def, | |
2200 | DECL_WEAK (decl), TREE_STATIC (decl), DECL_COMMON (decl), | |
2201 | TREE_PUBLIC (decl), TREE_CONSTANT (decl), TREE_READONLY (decl), | |
2202 | (unsigned long)DECL_INITIAL (decl)); | |
2203 | #endif | |
2204 | ||
2205 | /* Darwin needs help to support local zero-sized objects. | |
2206 | They must be made at least one byte, and the section containing must be | |
2207 | marked as unsuitable for section-anchors (see storage allocators below). | |
2208 | ||
2209 | For non-zero objects this output is handled by varasm.c. | |
2210 | */ | |
2211 | if (!size) | |
2212 | { | |
2213 | unsigned int l2align = 0; | |
2214 | ||
a967a7ec | 2215 | /* The align must be honored, even for zero-sized. */ |
8e79e9d4 | 2216 | if (DECL_ALIGN (decl)) |
2217 | { | |
2218 | l2align = floor_log2 (DECL_ALIGN (decl) / BITS_PER_UNIT); | |
2219 | fprintf (file, "\t.align\t%u\n", l2align); | |
2220 | } | |
2221 | ||
2222 | ASM_OUTPUT_LABEL (file, xname); | |
2223 | size = 1; | |
2224 | fprintf (file, "\t.space\t"HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); | |
2225 | ||
2226 | /* Check that we've correctly picked up the zero-sized item and placed it | |
2227 | properly. */ | |
2228 | gcc_assert ((!DARWIN_SECTION_ANCHORS || !flag_section_anchors) | |
2229 | || (in_section | |
2230 | && (in_section->common.flags & SECTION_NO_ANCHOR))); | |
2231 | } | |
2232 | else | |
2233 | ASM_OUTPUT_LABEL (file, xname); | |
2234 | } | |
427eb138 | 2235 | |
8e79e9d4 | 2236 | /* The implementation of ASM_DECLARE_CONSTANT_NAME. */ |
427eb138 | 2237 | void |
2238 | darwin_asm_declare_constant_name (FILE *file, const char *name, | |
2239 | const_tree exp ATTRIBUTE_UNUSED, | |
2240 | HOST_WIDE_INT size) | |
2241 | { | |
2242 | assemble_label (file, name); | |
8e79e9d4 | 2243 | /* As for other items, we need at least one byte. */ |
2244 | if (!size) | |
2245 | { | |
2246 | fputs ("\t.space\t1\n", file); | |
2247 | /* Check that we've correctly picked up the zero-sized item and placed it | |
2248 | properly. */ | |
2249 | gcc_assert ((!DARWIN_SECTION_ANCHORS || !flag_section_anchors) | |
2250 | || (in_section | |
2251 | && (in_section->common.flags & SECTION_NO_ANCHOR))); | |
2252 | } | |
2253 | } | |
2254 | ||
2255 | /* Darwin storage allocators. | |
2256 | ||
2257 | Zerofill sections are desirable for large blank data since, otherwise, these | |
2258 | data bloat objects (PR33210). | |
2259 | ||
2260 | However, section anchors don't work in .zerofill sections (one cannot switch | |
2261 | to a zerofill section). Ergo, for Darwin targets using section anchors we need | |
2262 | to put (at least some) data into 'normal' switchable sections. | |
2263 | ||
2264 | Here we set a relatively arbitrary value for the size of an object to trigger | |
2265 | zerofill when section anchors are enabled (anything bigger than a page for | |
2266 | current Darwin implementations). FIXME: there ought to be some objective way | |
2267 | to make this choice. | |
2268 | ||
2269 | When section anchor are off this is ignored anyway. */ | |
2270 | ||
2271 | #define BYTES_ZFILL 4096 | |
2272 | ||
2273 | /* Emit a chunk of data for items coalesced by the linker. */ | |
2274 | static void | |
2275 | darwin_emit_weak_or_comdat (FILE *fp, tree decl, const char *name, | |
2276 | unsigned HOST_WIDE_INT size, | |
2277 | unsigned int align) | |
2278 | { | |
2279 | /* Since the sections used here are coalesed, they will not be eligible | |
2280 | for section anchors, and therefore we don't need to break that out. */ | |
2281 | if (TREE_READONLY (decl) || TREE_CONSTANT (decl)) | |
2282 | switch_to_section (darwin_sections[const_data_coal_section]); | |
2283 | else | |
2284 | switch_to_section (darwin_sections[data_coal_section]); | |
2285 | ||
2286 | /* To be consistent, we'll allow darwin_asm_declare_object_name to assemble | |
2287 | the align info for zero-sized items... but do it here otherwise. */ | |
2288 | if (size && align) | |
2289 | fprintf (fp, "\t.align\t%d\n", floor_log2 (align / BITS_PER_UNIT)); | |
2290 | ||
2291 | if (TREE_PUBLIC (decl)) | |
2292 | darwin_globalize_label (fp, name); | |
2293 | ||
2294 | /* ... and we let it deal with outputting one byte of zero for them too. */ | |
2295 | darwin_asm_declare_object_name (fp, name, decl); | |
2296 | if (size) | |
2297 | assemble_zeros (size); | |
2298 | } | |
2299 | ||
267785bc | 2300 | /* Emit a chunk of data for ObjC meta-data that got placed in BSS erroneously. */ |
2301 | static void | |
2302 | darwin_emit_objc_zeroed (FILE *fp, tree decl, const char *name, | |
2303 | unsigned HOST_WIDE_INT size, | |
2304 | unsigned int align, tree meta) | |
2305 | { | |
2306 | section *ocs = data_section; | |
2307 | ||
2308 | if (TREE_PURPOSE (meta) == get_identifier("OBJC2META")) | |
2309 | ocs = darwin_objc2_section (decl, meta, ocs); | |
2310 | else | |
2311 | ocs = darwin_objc1_section (decl, meta, ocs); | |
2312 | ||
2313 | switch_to_section (ocs); | |
2314 | ||
2315 | /* We shall declare that zero-sized meta-data are not valid (yet). */ | |
2316 | gcc_assert (size); | |
2317 | fprintf (fp, "\t.align\t%d\n", floor_log2 (align / BITS_PER_UNIT)); | |
2318 | ||
2319 | /* ... and we let it deal with outputting one byte of zero for them too. */ | |
2320 | darwin_asm_declare_object_name (fp, name, decl); | |
2321 | assemble_zeros (size); | |
2322 | } | |
2323 | ||
8e79e9d4 | 2324 | /* This routine emits 'local' storage: |
2325 | ||
2326 | When Section Anchors are off this routine emits .zerofill commands in | |
2327 | sections named for their alignment. | |
2328 | ||
2329 | When Section Anchors are on, smaller (non-zero-sized) items are placed in | |
2330 | the .static_data section so that the section anchoring system can see them. | |
2331 | Larger items are still placed in .zerofill sections, addressing PR33210. | |
2332 | The routine has no checking - it is all assumed to be done by the caller. | |
2333 | */ | |
2334 | static void | |
2335 | darwin_emit_local_bss (FILE *fp, tree decl, const char *name, | |
2336 | unsigned HOST_WIDE_INT size, | |
2337 | unsigned int l2align) | |
2338 | { | |
2339 | /* FIXME: We have a fudge to make this work with Java even when the target does | |
2340 | not use sections anchors -- Java seems to need at least one small item in a | |
2341 | non-zerofill segment. */ | |
2342 | if ((DARWIN_SECTION_ANCHORS && flag_section_anchors && size < BYTES_ZFILL) | |
2343 | || (size && size <= 2)) | |
2344 | { | |
2345 | /* Put smaller objects in _static_data, where the section anchors system | |
2346 | can get them. | |
2347 | However, if they are zero-sized punt them to yet a different section | |
2348 | (that is not allowed to participate in anchoring). */ | |
2349 | if (!size) | |
2350 | { | |
2351 | fputs ("\t.section\t__DATA,__zobj_bss\n", fp); | |
2352 | in_section = darwin_sections[zobj_bss_section]; | |
2353 | size = 1; | |
2354 | } | |
2355 | else | |
2356 | { | |
2357 | fputs ("\t.static_data\n", fp); | |
2358 | in_section = darwin_sections[static_data_section]; | |
2359 | } | |
2360 | ||
2361 | if (l2align) | |
2362 | fprintf (fp, "\t.align\t%u\n", l2align); | |
2363 | ||
2364 | assemble_name (fp, name); | |
2365 | fprintf (fp, ":\n\t.space\t"HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); | |
2366 | } | |
2367 | else | |
2368 | { | |
2369 | /* When we are on a non-section anchor target, we can get zero-sized | |
2370 | items here. However, all we need to do is to bump them to one byte | |
2371 | and the section alignment will take care of the rest. */ | |
2372 | char secnam[64]; | |
2373 | unsigned int flags ; | |
2374 | snprintf (secnam, 64, "__DATA,__%sbss%u", ((size)?"":"zo_"), | |
2375 | (unsigned) l2align); | |
2376 | /* We can't anchor (yet, if ever) in zerofill sections, because we can't | |
2377 | switch to them and emit a label. */ | |
2378 | flags = SECTION_BSS|SECTION_WRITE|SECTION_NO_ANCHOR; | |
2379 | in_section = get_section (secnam, flags, NULL); | |
2380 | fprintf (fp, "\t.zerofill %s,", secnam); | |
2381 | assemble_name (fp, name); | |
2382 | if (!size) | |
2383 | size = 1; | |
2384 | ||
2385 | if (l2align) | |
2386 | fprintf (fp, ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", | |
2387 | size, (unsigned) l2align); | |
2388 | else | |
2389 | fprintf (fp, ","HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); | |
2390 | } | |
2391 | ||
2392 | (*targetm.encode_section_info) (decl, DECL_RTL (decl), false); | |
2393 | /* This is defined as a file-scope var, so we know to notify machopic. */ | |
2394 | machopic_define_symbol (DECL_RTL (decl)); | |
2395 | } | |
2396 | ||
2397 | /* Emit a chunk of common. */ | |
2398 | static void | |
2399 | darwin_emit_common (FILE *fp, const char *name, | |
2400 | unsigned HOST_WIDE_INT size, unsigned int align) | |
2401 | { | |
2402 | unsigned HOST_WIDE_INT rounded; | |
2403 | unsigned int l2align; | |
427eb138 | 2404 | |
8e79e9d4 | 2405 | /* Earlier systems complain if the alignment exceeds the page size. |
2406 | The magic number is 4096 * 8 - hard-coded for legacy systems. */ | |
2407 | if (!emit_aligned_common && (align > 32768UL)) | |
2408 | align = 4096UL; /* In units. */ | |
2409 | else | |
2410 | align /= BITS_PER_UNIT; | |
2411 | ||
2412 | /* Make sure we have a meaningful align. */ | |
2413 | if (!align) | |
2414 | align = 1; | |
2415 | ||
2416 | /* For earlier toolchains, we need to emit the var as a rounded size to | |
2417 | tell ld the alignment. */ | |
2418 | if (size < align) | |
2419 | rounded = align; | |
2420 | else | |
2421 | rounded = (size + (align-1)) & ~(align-1); | |
2422 | ||
2423 | l2align = floor_log2 (align); | |
2424 | gcc_assert (l2align <= L2_MAX_OFILE_ALIGNMENT); | |
2425 | ||
2426 | in_section = comm_section; | |
2427 | /* We mustn't allow multiple public symbols to share an address when using | |
2428 | the normal OSX toolchain. */ | |
2429 | if (!size) | |
2430 | { | |
2431 | /* Put at least one byte. */ | |
2432 | size = 1; | |
2433 | /* This section can no longer participate in section anchoring. */ | |
2434 | comm_section->common.flags |= SECTION_NO_ANCHOR; | |
2435 | } | |
2436 | ||
2437 | fputs ("\t.comm\t", fp); | |
2438 | assemble_name (fp, name); | |
2439 | fprintf (fp, "," HOST_WIDE_INT_PRINT_UNSIGNED, | |
2440 | emit_aligned_common?size:rounded); | |
2441 | if (l2align && emit_aligned_common) | |
2442 | fprintf (fp, ",%u", l2align); | |
2443 | fputs ("\n", fp); | |
2444 | } | |
2445 | ||
2446 | /* Output a var which is all zero - into aligned BSS sections, common, lcomm | |
2447 | or coalescable data sections (for weak or comdat) as appropriate. */ | |
2448 | ||
2449 | void | |
2450 | darwin_output_aligned_bss (FILE *fp, tree decl, const char *name, | |
2451 | unsigned HOST_WIDE_INT size, unsigned int align) | |
2452 | { | |
2453 | unsigned int l2align; | |
2454 | bool one, pub, weak; | |
267785bc | 2455 | tree meta; |
8e79e9d4 | 2456 | |
2457 | pub = TREE_PUBLIC (decl); | |
2458 | one = DECL_ONE_ONLY (decl); | |
2459 | weak = (DECL_P (decl) | |
2460 | && DECL_WEAK (decl) | |
2461 | && !lookup_attribute ("weak_import", | |
2462 | DECL_ATTRIBUTES (decl))); | |
2463 | ||
2464 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2465 | fprintf (fp, "# albss: %s (%lld,%d) ro %d cst %d stat %d com %d" | |
2466 | " pub %d weak %d one %d init %lx\n", | |
2467 | name, (long long)size, (int)align, TREE_READONLY (decl), | |
2468 | TREE_CONSTANT (decl), TREE_STATIC (decl), DECL_COMMON (decl), | |
2469 | pub, weak, one, (unsigned long)DECL_INITIAL (decl)); | |
2470 | #endif | |
2471 | ||
267785bc | 2472 | /* ObjC metadata can get put in BSS because varasm.c decides it's BSS |
2473 | before the target has a chance to comment. */ | |
2474 | if ((meta = is_objc_metadata (decl))) | |
2475 | { | |
2476 | darwin_emit_objc_zeroed (fp, decl, name, size, DECL_ALIGN (decl), meta); | |
2477 | return; | |
2478 | } | |
2479 | ||
8e79e9d4 | 2480 | /* Check that any initializer is valid. */ |
2481 | gcc_assert ((DECL_INITIAL (decl) == NULL) | |
2482 | || (DECL_INITIAL (decl) == error_mark_node) | |
2483 | || initializer_zerop (DECL_INITIAL (decl))); | |
2484 | ||
2485 | gcc_assert (DECL_SECTION_NAME (decl) == NULL); | |
2486 | gcc_assert (!DECL_COMMON (decl)); | |
2487 | ||
2488 | /* Pick up the correct alignment. */ | |
2489 | if (!size || !align) | |
2490 | align = DECL_ALIGN (decl); | |
2491 | ||
2492 | l2align = floor_log2 (align / BITS_PER_UNIT); | |
2493 | gcc_assert (l2align <= L2_MAX_OFILE_ALIGNMENT); | |
2494 | ||
2495 | last_assemble_variable_decl = decl; | |
2496 | ||
2497 | /* We would rather not have to check this here - but it seems that we might | |
2498 | be passed a decl that should be in coalesced space. */ | |
2499 | if (one || weak) | |
2500 | { | |
a967a7ec | 2501 | /* Weak or COMDAT objects are put in mergeable sections. */ |
8e79e9d4 | 2502 | darwin_emit_weak_or_comdat (fp, decl, name, size, |
2503 | DECL_ALIGN (decl)); | |
2504 | return; | |
2505 | } | |
2506 | ||
2507 | /* If this is not public, then emit according to local rules. */ | |
2508 | if (!pub) | |
2509 | { | |
2510 | darwin_emit_local_bss (fp, decl, name, size, l2align); | |
2511 | return; | |
2512 | } | |
2513 | ||
2514 | /* So we have a public symbol (small item fudge for Java, see above). */ | |
2515 | if ((DARWIN_SECTION_ANCHORS && flag_section_anchors && size < BYTES_ZFILL) | |
2516 | || (size && size <= 2)) | |
2517 | { | |
2518 | /* Put smaller objects in data, where the section anchors system can get | |
2519 | them. However, if they are zero-sized punt them to yet a different | |
2520 | section (that is not allowed to participate in anchoring). */ | |
2521 | if (!size) | |
2522 | { | |
2523 | fputs ("\t.section\t__DATA,__zobj_data\n", fp); | |
2524 | in_section = darwin_sections[zobj_data_section]; | |
2525 | size = 1; | |
2526 | } | |
2527 | else | |
2528 | { | |
2529 | fputs ("\t.data\n", fp); | |
2530 | in_section = data_section; | |
2531 | } | |
2532 | ||
2533 | if (l2align) | |
2534 | fprintf (fp, "\t.align\t%u\n", l2align); | |
2535 | ||
2536 | assemble_name (fp, name); | |
2537 | fprintf (fp, ":\n\t.space\t"HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); | |
2538 | } | |
2539 | else | |
2540 | { | |
2541 | char secnam[64]; | |
2542 | unsigned int flags ; | |
2543 | /* When we are on a non-section anchor target, we can get zero-sized | |
2544 | items here. However, all we need to do is to bump them to one byte | |
2545 | and the section alignment will take care of the rest. */ | |
2546 | snprintf (secnam, 64, "__DATA,__%spu_bss%u", ((size)?"":"zo_"), l2align); | |
2547 | ||
2548 | /* We can't anchor in zerofill sections, because we can't switch | |
2549 | to them and emit a label. */ | |
2550 | flags = SECTION_BSS|SECTION_WRITE|SECTION_NO_ANCHOR; | |
2551 | in_section = get_section (secnam, flags, NULL); | |
2552 | fprintf (fp, "\t.zerofill %s,", secnam); | |
2553 | assemble_name (fp, name); | |
2554 | if (!size) | |
2555 | size = 1; | |
2556 | ||
2557 | if (l2align) | |
2558 | fprintf (fp, ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", size, l2align); | |
2559 | else | |
2560 | fprintf (fp, ","HOST_WIDE_INT_PRINT_UNSIGNED"\n", size); | |
2561 | } | |
2562 | (* targetm.encode_section_info) (decl, DECL_RTL (decl), false); | |
2563 | } | |
2564 | ||
2565 | /* Output a chunk of common, with alignment specified (where the target | |
2566 | supports this). */ | |
2567 | void | |
2568 | darwin_asm_output_aligned_decl_common (FILE *fp, tree decl, const char *name, | |
2569 | unsigned HOST_WIDE_INT size, | |
2570 | unsigned int align) | |
2571 | { | |
2572 | unsigned int l2align; | |
2573 | bool one, weak; | |
267785bc | 2574 | tree meta; |
2575 | ||
8e79e9d4 | 2576 | /* No corresponding var. */ |
2577 | if (decl==NULL) | |
2578 | { | |
2579 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2580 | fprintf (fp, "# adcom: %s (%d,%d) decl=0x0\n", name, (int)size, (int)align); | |
2581 | #endif | |
2582 | darwin_emit_common (fp, name, size, align); | |
2583 | return; | |
2584 | } | |
2585 | ||
2586 | one = DECL_ONE_ONLY (decl); | |
2587 | weak = (DECL_P (decl) | |
2588 | && DECL_WEAK (decl) | |
2589 | && !lookup_attribute ("weak_import", | |
2590 | DECL_ATTRIBUTES (decl))); | |
2591 | ||
2592 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2593 | fprintf (fp, "# adcom: %s (%lld,%d) ro %d cst %d stat %d com %d pub %d" | |
2594 | " weak %d one %d init %lx\n", | |
2595 | name, (long long)size, (int)align, TREE_READONLY (decl), | |
2596 | TREE_CONSTANT (decl), TREE_STATIC (decl), DECL_COMMON (decl), | |
2597 | TREE_PUBLIC (decl), weak, one, (unsigned long)DECL_INITIAL (decl)); | |
2598 | #endif | |
2599 | ||
267785bc | 2600 | /* ObjC metadata can get put in BSS because varasm.c decides it's BSS |
2601 | before the target has a chance to comment. */ | |
2602 | if ((meta = is_objc_metadata (decl))) | |
2603 | { | |
2604 | darwin_emit_objc_zeroed (fp, decl, name, size, DECL_ALIGN (decl), meta); | |
2605 | return; | |
2606 | } | |
2607 | ||
8e79e9d4 | 2608 | /* We shouldn't be messing with this if the decl has a section name. */ |
2609 | gcc_assert (DECL_SECTION_NAME (decl) == NULL); | |
2610 | ||
2611 | /* We would rather not have to check this here - but it seems that we might | |
2612 | be passed a decl that should be in coalesced space. */ | |
2613 | if (one || weak) | |
2614 | { | |
2615 | /* Weak or COMDAT objects are put in mergable sections. */ | |
2616 | darwin_emit_weak_or_comdat (fp, decl, name, size, | |
2617 | DECL_ALIGN (decl)); | |
2618 | return; | |
2619 | } | |
2620 | ||
2621 | /* We should only get here for DECL_COMMON, with a zero init (and, in | |
2622 | principle, only for public symbols too - although we deal with local | |
2623 | ones below). */ | |
2624 | ||
2625 | /* Check the initializer is OK. */ | |
2626 | gcc_assert (DECL_COMMON (decl) | |
2627 | && ((DECL_INITIAL (decl) == NULL) | |
2628 | || (DECL_INITIAL (decl) == error_mark_node) | |
2629 | || initializer_zerop (DECL_INITIAL (decl)))); | |
2630 | ||
2631 | last_assemble_variable_decl = decl; | |
2632 | ||
2633 | if (!size || !align) | |
2634 | align = DECL_ALIGN (decl); | |
2635 | ||
2636 | l2align = floor_log2 (align / BITS_PER_UNIT); | |
2637 | /* Check we aren't asking for more aligment than the platform allows. */ | |
2638 | gcc_assert (l2align <= L2_MAX_OFILE_ALIGNMENT); | |
2639 | ||
2640 | if (TREE_PUBLIC (decl) != 0) | |
2641 | darwin_emit_common (fp, name, size, align); | |
2642 | else | |
2643 | darwin_emit_local_bss (fp, decl, name, size, l2align); | |
2644 | } | |
2645 | ||
2646 | /* Output a chunk of BSS with alignment specfied. */ | |
2647 | void | |
2648 | darwin_asm_output_aligned_decl_local (FILE *fp, tree decl, const char *name, | |
2649 | unsigned HOST_WIDE_INT size, | |
2650 | unsigned int align) | |
2651 | { | |
2652 | unsigned long l2align; | |
2653 | bool one, weak; | |
267785bc | 2654 | tree meta; |
8e79e9d4 | 2655 | |
2656 | one = DECL_ONE_ONLY (decl); | |
2657 | weak = (DECL_P (decl) | |
2658 | && DECL_WEAK (decl) | |
2659 | && !lookup_attribute ("weak_import", | |
2660 | DECL_ATTRIBUTES (decl))); | |
2661 | ||
2662 | #ifdef DEBUG_DARWIN_MEM_ALLOCATORS | |
2663 | fprintf (fp, "# adloc: %s (%lld,%d) ro %d cst %d stat %d one %d pub %d" | |
2664 | " weak %d init %lx\n", | |
2665 | name, (long long)size, (int)align, TREE_READONLY (decl), | |
2666 | TREE_CONSTANT (decl), TREE_STATIC (decl), one, TREE_PUBLIC (decl), | |
2667 | weak , (unsigned long)DECL_INITIAL (decl)); | |
2668 | #endif | |
2669 | ||
267785bc | 2670 | /* ObjC metadata can get put in BSS because varasm.c decides it's BSS |
2671 | before the target has a chance to comment. */ | |
2672 | if ((meta = is_objc_metadata (decl))) | |
2673 | { | |
2674 | darwin_emit_objc_zeroed (fp, decl, name, size, DECL_ALIGN (decl), meta); | |
2675 | return; | |
2676 | } | |
2677 | ||
8e79e9d4 | 2678 | /* We shouldn't be messing with this if the decl has a section name. */ |
2679 | gcc_assert (DECL_SECTION_NAME (decl) == NULL); | |
2680 | ||
2681 | /* We would rather not have to check this here - but it seems that we might | |
2682 | be passed a decl that should be in coalesced space. */ | |
2683 | if (one || weak) | |
2684 | { | |
2685 | /* Weak or COMDAT objects are put in mergable sections. */ | |
2686 | darwin_emit_weak_or_comdat (fp, decl, name, size, | |
2687 | DECL_ALIGN (decl)); | |
2688 | return; | |
2689 | } | |
2690 | ||
2691 | /* .. and it should be suitable for placement in local mem. */ | |
2692 | gcc_assert(!TREE_PUBLIC (decl) && !DECL_COMMON (decl)); | |
2693 | /* .. and any initializer must be all-zero. */ | |
2694 | gcc_assert ((DECL_INITIAL (decl) == NULL) | |
2695 | || (DECL_INITIAL (decl) == error_mark_node) | |
2696 | || initializer_zerop (DECL_INITIAL (decl))); | |
2697 | ||
2698 | last_assemble_variable_decl = decl; | |
2699 | ||
2700 | if (!size || !align) | |
2701 | align = DECL_ALIGN (decl); | |
2702 | ||
2703 | l2align = floor_log2 (align / BITS_PER_UNIT); | |
2704 | gcc_assert (l2align <= L2_MAX_OFILE_ALIGNMENT); | |
2705 | ||
2706 | darwin_emit_local_bss (fp, decl, name, size, l2align); | |
427eb138 | 2707 | } |
2708 | ||
2c5b6111 | 2709 | /* Emit an assembler directive to set visibility for a symbol. The |
2710 | only supported visibilities are VISIBILITY_DEFAULT and | |
2711 | VISIBILITY_HIDDEN; the latter corresponds to Darwin's "private | |
2712 | extern". There is no MACH-O equivalent of ELF's | |
2713 | VISIBILITY_INTERNAL or VISIBILITY_PROTECTED. */ | |
2714 | ||
b215c058 | 2715 | void |
2c5b6111 | 2716 | darwin_assemble_visibility (tree decl, int vis) |
2717 | { | |
2718 | if (vis == VISIBILITY_DEFAULT) | |
2719 | ; | |
a115dd2c | 2720 | else if (vis == VISIBILITY_HIDDEN || vis == VISIBILITY_INTERNAL) |
2c5b6111 | 2721 | { |
2722 | fputs ("\t.private_extern ", asm_out_file); | |
2723 | assemble_name (asm_out_file, | |
2724 | (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)))); | |
2725 | fputs ("\n", asm_out_file); | |
2726 | } | |
2727 | else | |
a115dd2c | 2728 | warning (OPT_Wattributes, "protected visibility attribute " |
9b2d6d13 | 2729 | "not supported in this configuration; ignored"); |
2c5b6111 | 2730 | } |
2731 | ||
f1f41a6c | 2732 | /* vec used by darwin_asm_dwarf_section. |
edea89b9 | 2733 | Maybe a hash tab would be better here - but the intention is that this is |
2734 | a very short list (fewer than 16 items) and each entry should (ideally, | |
2735 | eventually) only be presented once. | |
2736 | ||
2737 | A structure to hold a dwarf debug section used entry. */ | |
2738 | ||
2739 | typedef struct GTY(()) dwarf_sect_used_entry { | |
2740 | const char *name; | |
2741 | unsigned count; | |
2742 | } | |
2743 | dwarf_sect_used_entry; | |
2744 | ||
edea89b9 | 2745 | |
2746 | /* A list of used __DWARF sections. */ | |
f1f41a6c | 2747 | static GTY (()) vec<dwarf_sect_used_entry, va_gc> *dwarf_sect_names_table; |
edea89b9 | 2748 | |
2749 | /* This is called when we are asked to assemble a named section and the | |
2750 | name begins with __DWARF,. We keep a list of the section names (without | |
2751 | the __DWARF, prefix) and use this to emit our required start label on the | |
2752 | first switch to each section. */ | |
2753 | ||
2754 | static void | |
2755 | darwin_asm_dwarf_section (const char *name, unsigned int flags, | |
2756 | tree ARG_UNUSED (decl)) | |
2757 | { | |
2758 | unsigned i; | |
2759 | int namelen; | |
2760 | const char * sname; | |
2761 | dwarf_sect_used_entry *ref; | |
2762 | bool found = false; | |
2763 | gcc_assert ((flags & (SECTION_DEBUG | SECTION_NAMED)) | |
2764 | == (SECTION_DEBUG | SECTION_NAMED)); | |
2765 | /* We know that the name starts with __DWARF, */ | |
2766 | sname = name + 8; | |
2767 | namelen = strchr (sname, ',') - sname; | |
2768 | gcc_assert (namelen); | |
2769 | if (dwarf_sect_names_table == NULL) | |
f1f41a6c | 2770 | vec_alloc (dwarf_sect_names_table, 16); |
edea89b9 | 2771 | else |
2772 | for (i = 0; | |
f1f41a6c | 2773 | dwarf_sect_names_table->iterate (i, &ref); |
edea89b9 | 2774 | i++) |
2775 | { | |
2776 | if (!ref) | |
2777 | break; | |
2778 | if (!strcmp (ref->name, sname)) | |
2779 | { | |
2780 | found = true; | |
2781 | ref->count++; | |
2782 | break; | |
2783 | } | |
2784 | } | |
2785 | ||
2786 | fprintf (asm_out_file, "\t.section %s\n", name); | |
2787 | if (!found) | |
2788 | { | |
2789 | dwarf_sect_used_entry e; | |
2790 | fprintf (asm_out_file, "Lsection%.*s:\n", namelen, sname); | |
2791 | e.count = 1; | |
2792 | e.name = xstrdup (sname); | |
f1f41a6c | 2793 | vec_safe_push (dwarf_sect_names_table, e); |
edea89b9 | 2794 | } |
2795 | } | |
2796 | ||
a08b74c8 | 2797 | /* Output a difference of two labels that will be an assembly time |
2798 | constant if the two labels are local. (.long lab1-lab2 will be | |
2799 | very different if lab1 is at the boundary between two sections; it | |
2800 | will be relocated according to the second section, not the first, | |
2801 | so one ends up with a difference between labels in different | |
2802 | sections, which is bad in the dwarf2 eh context for instance.) */ | |
2803 | ||
2804 | static int darwin_dwarf_label_counter; | |
2805 | ||
2806 | void | |
85d3e3b5 | 2807 | darwin_asm_output_dwarf_delta (FILE *file, int size, |
b40da9a7 | 2808 | const char *lab1, const char *lab2) |
a08b74c8 | 2809 | { |
2f9fc8ef | 2810 | int islocaldiff = (lab1[0] == '*' && lab1[1] == 'L' |
2811 | && lab2[0] == '*' && lab2[1] == 'L'); | |
dcf3c3f7 | 2812 | const char *directive = (size == 8 ? ".quad" : ".long"); |
a08b74c8 | 2813 | |
2814 | if (islocaldiff) | |
2815 | fprintf (file, "\t.set L$set$%d,", darwin_dwarf_label_counter); | |
2816 | else | |
85d3e3b5 | 2817 | fprintf (file, "\t%s\t", directive); |
8e79e9d4 | 2818 | |
48126f0c | 2819 | assemble_name_raw (file, lab1); |
a08b74c8 | 2820 | fprintf (file, "-"); |
48126f0c | 2821 | assemble_name_raw (file, lab2); |
a08b74c8 | 2822 | if (islocaldiff) |
85d3e3b5 | 2823 | fprintf (file, "\n\t%s L$set$%d", directive, darwin_dwarf_label_counter++); |
a08b74c8 | 2824 | } |
d08d29c0 | 2825 | |
d08d29c0 | 2826 | /* Output an offset in a DWARF section on Darwin. On Darwin, DWARF section |
2827 | offsets are not represented using relocs in .o files; either the | |
2828 | section never leaves the .o file, or the linker or other tool is | |
2829 | responsible for parsing the DWARF and updating the offsets. */ | |
2830 | ||
2831 | void | |
2832 | darwin_asm_output_dwarf_offset (FILE *file, int size, const char * lab, | |
2833 | section *base) | |
2834 | { | |
2835 | char sname[64]; | |
2836 | int namelen; | |
f720b7c6 | 2837 | |
d08d29c0 | 2838 | gcc_assert (base->common.flags & SECTION_NAMED); |
2839 | gcc_assert (strncmp (base->named.name, "__DWARF,", 8) == 0); | |
2840 | gcc_assert (strchr (base->named.name + 8, ',')); | |
2841 | ||
2842 | namelen = strchr (base->named.name + 8, ',') - (base->named.name + 8); | |
2843 | sprintf (sname, "*Lsection%.*s", namelen, base->named.name + 8); | |
2844 | darwin_asm_output_dwarf_delta (file, size, lab, sname); | |
2845 | } | |
a08b74c8 | 2846 | |
13e2f0a0 | 2847 | /* Called from the within the TARGET_ASM_FILE_START for each target. */ |
edea89b9 | 2848 | |
2849 | void | |
2850 | darwin_file_start (void) | |
2851 | { | |
13e2f0a0 | 2852 | /* Nothing to do. */ |
edea89b9 | 2853 | } |
2854 | ||
2855 | /* Called for the TARGET_ASM_FILE_END hook. | |
2856 | Emit the mach-o pic indirection data, the lto data and, finally a flag | |
2857 | to tell the linker that it can break the file object into sections and | |
2858 | move those around for efficiency. */ | |
2859 | ||
f6940372 | 2860 | void |
b40da9a7 | 2861 | darwin_file_end (void) |
f6940372 | 2862 | { |
4b313269 | 2863 | if (!vec_safe_is_empty (ctors)) |
ed161dab | 2864 | finalize_ctors (); |
2865 | if (!vec_safe_is_empty (dtors)) | |
2866 | finalize_dtors (); | |
236ce1d1 | 2867 | |
2868 | /* If we are expecting to output NeXT ObjC meta-data, (and we actually see | |
2869 | some) then we output the fix-and-continue marker (Image Info). | |
2870 | This applies to Objective C, Objective C++ and LTO with either language | |
2871 | as part of the input. */ | |
2872 | if (flag_next_runtime && objc_metadata_seen) | |
2873 | { | |
2874 | unsigned int flags = 0; | |
2875 | if (flag_objc_abi >= 2) | |
2876 | { | |
2877 | flags = 16; | |
2878 | output_section_asm_op | |
2879 | (darwin_sections[objc2_image_info_section]->unnamed.data); | |
2880 | } | |
2881 | else | |
2882 | output_section_asm_op | |
2883 | (darwin_sections[objc_image_info_section]->unnamed.data); | |
2884 | ||
2885 | ASM_OUTPUT_ALIGN (asm_out_file, 2); | |
2886 | fputs ("L_OBJC_ImageInfo:\n", asm_out_file); | |
2887 | ||
2888 | flags |= (flag_replace_objc_classes && classes_seen) ? 1 : 0; | |
2889 | flags |= flag_objc_gc ? 2 : 0; | |
2890 | ||
2891 | fprintf (asm_out_file, "\t.long\t0\n\t.long\t%u\n", flags); | |
2892 | } | |
2893 | ||
f6940372 | 2894 | machopic_finish (asm_out_file); |
2895 | if (strcmp (lang_hooks.name, "GNU C++") == 0) | |
2896 | { | |
92e4ba7d | 2897 | switch_to_section (darwin_sections[constructor_section]); |
2898 | switch_to_section (darwin_sections[destructor_section]); | |
f6940372 | 2899 | ASM_OUTPUT_ALIGN (asm_out_file, 1); |
2900 | } | |
23433d72 | 2901 | |
2902 | /* If there was LTO assembler output, append it to asm_out_file. */ | |
2903 | if (lto_asm_out_name) | |
2904 | { | |
2905 | int n; | |
2906 | char *buf, *lto_asm_txt; | |
2907 | ||
2908 | /* Shouldn't be here if we failed to switch back. */ | |
2909 | gcc_assert (! saved_asm_out_file); | |
2910 | ||
2911 | lto_asm_out_file = fopen (lto_asm_out_name, "r"); | |
2912 | if (lto_asm_out_file == NULL) | |
2913 | fatal_error ("failed to open temporary file %s with LTO output", | |
2914 | lto_asm_out_name); | |
2915 | fseek (lto_asm_out_file, 0, SEEK_END); | |
2916 | n = ftell (lto_asm_out_file); | |
2917 | if (n > 0) | |
2918 | { | |
2919 | fseek (lto_asm_out_file, 0, SEEK_SET); | |
2920 | lto_asm_txt = buf = (char *) xmalloc (n + 1); | |
2921 | while (fgets (lto_asm_txt, n, lto_asm_out_file)) | |
2922 | fputs (lto_asm_txt, asm_out_file); | |
13e2f0a0 | 2923 | /* Put a termination label. */ |
2924 | fprintf (asm_out_file, "\t.section %s,%s,regular,debug\n", | |
2925 | LTO_SEGMENT_NAME, LTO_SECTS_SECTION); | |
2926 | fprintf (asm_out_file, "L_GNU_LTO%d:\t;# end of lto\n", | |
2927 | lto_section_num); | |
2928 | /* Make sure our termination label stays in this section. */ | |
2929 | fputs ("\t.space\t1\n", asm_out_file); | |
23433d72 | 2930 | } |
2931 | ||
2932 | /* Remove the temporary file. */ | |
2933 | fclose (lto_asm_out_file); | |
2934 | unlink_if_ordinary (lto_asm_out_name); | |
2935 | free (lto_asm_out_name); | |
2936 | } | |
2937 | ||
13e2f0a0 | 2938 | /* Output the names and indices. */ |
f1f41a6c | 2939 | if (lto_section_names && lto_section_names->length ()) |
23433d72 | 2940 | { |
13e2f0a0 | 2941 | int count; |
2942 | darwin_lto_section_e *ref; | |
2943 | /* For now, we'll make the offsets 4 bytes and unaligned - we'll fix | |
2944 | the latter up ourselves. */ | |
2945 | const char *op = integer_asm_op (4,0); | |
2946 | ||
2947 | /* Emit the names. */ | |
2948 | fprintf (asm_out_file, "\t.section %s,%s,regular,debug\n", | |
23433d72 | 2949 | LTO_SEGMENT_NAME, LTO_NAMES_SECTION); |
f1f41a6c | 2950 | FOR_EACH_VEC_ELT (*lto_section_names, count, ref) |
13e2f0a0 | 2951 | { |
2952 | fprintf (asm_out_file, "L_GNU_LTO_NAME%d:\n", count); | |
2953 | /* We have to jump through hoops to get the values of the intra-section | |
2954 | offsets... */ | |
2955 | fprintf (asm_out_file, | |
2956 | "\t.set L$gnu$lto$noff%d,L_GNU_LTO_NAME%d-L_GNU_LTO_NAME0\n", | |
2957 | count, count); | |
2958 | fprintf (asm_out_file, | |
2959 | "\t.set L$gnu$lto$nsiz%d,L_GNU_LTO_NAME%d-L_GNU_LTO_NAME%d\n", | |
2960 | count, count+1, count); | |
2961 | fprintf (asm_out_file, "\t.asciz\t\"%s\"\n", ref->sectname); | |
2962 | } | |
2963 | fprintf (asm_out_file, "L_GNU_LTO_NAME%d:\t;# end\n", lto_section_num); | |
2964 | /* make sure our termination label stays in this section. */ | |
2965 | fputs ("\t.space\t1\n", asm_out_file); | |
2966 | ||
2967 | /* Emit the Index. */ | |
2968 | fprintf (asm_out_file, "\t.section %s,%s,regular,debug\n", | |
2969 | LTO_SEGMENT_NAME, LTO_INDEX_SECTION); | |
2970 | fputs ("\t.align\t2\n", asm_out_file); | |
2971 | fputs ("# Section offset, Section length, Name offset, Name length\n", | |
2972 | asm_out_file); | |
f1f41a6c | 2973 | FOR_EACH_VEC_ELT (*lto_section_names, count, ref) |
13e2f0a0 | 2974 | { |
2975 | fprintf (asm_out_file, "%s L$gnu$lto$offs%d\t;# %s\n", | |
2976 | op, count, ref->sectname); | |
2977 | fprintf (asm_out_file, "%s L$gnu$lto$size%d\n", op, count); | |
2978 | fprintf (asm_out_file, "%s L$gnu$lto$noff%d\n", op, count); | |
2979 | fprintf (asm_out_file, "%s L$gnu$lto$nsiz%d\n", op, count); | |
2980 | } | |
23433d72 | 2981 | } |
23433d72 | 2982 | |
8e79e9d4 | 2983 | /* If we have section anchors, then we must prevent the linker from |
2984 | re-arranging data. */ | |
2985 | if (!DARWIN_SECTION_ANCHORS || !flag_section_anchors) | |
2986 | fprintf (asm_out_file, "\t.subsections_via_symbols\n"); | |
f6940372 | 2987 | } |
2988 | ||
5b182752 | 2989 | /* TODO: Add a language hook for identifying if a decl is a vtable. */ |
2990 | #define DARWIN_VTABLE_P(DECL) 0 | |
2991 | ||
0765d519 | 2992 | /* Cross-module name binding. Darwin does not support overriding |
5b182752 | 2993 | functions at dynamic-link time, except for vtables in kexts. */ |
0765d519 | 2994 | |
2995 | bool | |
a9f1838b | 2996 | darwin_binds_local_p (const_tree decl) |
0765d519 | 2997 | { |
5b182752 | 2998 | return default_binds_local_p_1 (decl, |
2999 | TARGET_KEXTABI && DARWIN_VTABLE_P (decl)); | |
0765d519 | 3000 | } |
3001 | ||
8c27005f | 3002 | /* The Darwin's implementation of TARGET_ASM_OUTPUT_ANCHOR. Define the |
3003 | anchor relative to ".", the current section position. We cannot use | |
3004 | the default one because ASM_OUTPUT_DEF is wrong for Darwin. */ | |
8c27005f | 3005 | void |
3006 | darwin_asm_output_anchor (rtx symbol) | |
3007 | { | |
3008 | fprintf (asm_out_file, "\t.set\t"); | |
3009 | assemble_name (asm_out_file, XSTR (symbol, 0)); | |
3010 | fprintf (asm_out_file, ", . + " HOST_WIDE_INT_PRINT_DEC "\n", | |
3011 | SYMBOL_REF_BLOCK_OFFSET (symbol)); | |
3012 | } | |
8e79e9d4 | 3013 | |
3014 | /* Disable section anchoring on any section containing a zero-sized | |
3015 | object. */ | |
3016 | bool | |
3017 | darwin_use_anchors_for_symbol_p (const_rtx symbol) | |
3018 | { | |
3019 | if (DARWIN_SECTION_ANCHORS && flag_section_anchors) | |
3020 | { | |
3021 | section *sect; | |
3022 | /* If the section contains a zero-sized object it's ineligible. */ | |
3023 | sect = SYMBOL_REF_BLOCK (symbol)->sect; | |
3024 | /* This should have the effect of disabling anchors for vars that follow | |
3025 | any zero-sized one, in a given section. */ | |
3026 | if (sect->common.flags & SECTION_NO_ANCHOR) | |
3027 | return false; | |
3028 | ||
3029 | /* Also check the normal reasons for suppressing. */ | |
3030 | return default_use_anchors_for_symbol_p (symbol); | |
3031 | } | |
3032 | else | |
3033 | return false; | |
3034 | } | |
8c27005f | 3035 | |
f720b7c6 | 3036 | /* Set the darwin specific attributes on TYPE. */ |
3037 | void | |
3038 | darwin_set_default_type_attributes (tree type) | |
3039 | { | |
3040 | if (darwin_ms_struct | |
3041 | && TREE_CODE (type) == RECORD_TYPE) | |
3042 | TYPE_ATTRIBUTES (type) = tree_cons (get_identifier ("ms_struct"), | |
3043 | NULL_TREE, | |
3044 | TYPE_ATTRIBUTES (type)); | |
3045 | } | |
3046 | ||
26ac986e | 3047 | /* True, iff we're generating code for loadable kernel extensions. */ |
5b182752 | 3048 | |
3049 | bool | |
3050 | darwin_kextabi_p (void) { | |
3051 | return flag_apple_kext; | |
3052 | } | |
3053 | ||
3054 | void | |
3055 | darwin_override_options (void) | |
3056 | { | |
9e09909d | 3057 | /* Keep track of which (major) version we're generating code for. */ |
3058 | if (darwin_macosx_version_min) | |
3059 | { | |
3060 | if (strverscmp (darwin_macosx_version_min, "10.6") >= 0) | |
3061 | generating_for_darwin_version = 10; | |
3062 | else if (strverscmp (darwin_macosx_version_min, "10.5") >= 0) | |
3063 | generating_for_darwin_version = 9; | |
3064 | ||
3065 | /* Earlier versions are not specifically accounted, until required. */ | |
3066 | } | |
8e79e9d4 | 3067 | |
3f3d5ad4 | 3068 | /* In principle, this should be c-family only. However, we really need to |
3069 | set sensible defaults for LTO as well, since the section selection stuff | |
3070 | should check for correctness re. the ABI. TODO: check and provide the | |
3071 | flags (runtime & ABI) from the lto wrapper). */ | |
3072 | ||
3073 | /* Unless set, force ABI=2 for NeXT and m64, 0 otherwise. */ | |
3074 | if (!global_options_set.x_flag_objc_abi) | |
3075 | global_options.x_flag_objc_abi | |
3076 | = (!flag_next_runtime) | |
3077 | ? 0 | |
3078 | : (TARGET_64BIT ? 2 | |
3079 | : (generating_for_darwin_version >= 9) ? 1 | |
3080 | : 0); | |
3081 | ||
3082 | /* Objective-C family ABI 2 is only valid for next/m64 at present. */ | |
3083 | if (global_options_set.x_flag_objc_abi && flag_next_runtime) | |
3084 | { | |
3085 | if (TARGET_64BIT && global_options.x_flag_objc_abi < 2) | |
3086 | error_at (UNKNOWN_LOCATION, "%<-fobjc-abi-version%> >= 2 must be" | |
3087 | " used for %<-m64%> targets with" | |
3088 | " %<-fnext-runtime%>"); | |
3089 | if (!TARGET_64BIT && global_options.x_flag_objc_abi >= 2) | |
3090 | error_at (UNKNOWN_LOCATION, "%<-fobjc-abi-version%> >= 2 is not" | |
3091 | " supported on %<-m32%> targets with" | |
3092 | " %<-fnext-runtime%>"); | |
3093 | } | |
3094 | ||
024fa7dd | 3095 | /* Don't emit DWARF3/4 unless specifically selected. This is a |
3096 | workaround for tool bugs. */ | |
8e79e9d4 | 3097 | if (!global_options_set.x_dwarf_strict) |
024fa7dd | 3098 | dwarf_strict = 1; |
052166fd | 3099 | if (!global_options_set.x_dwarf_version) |
3100 | dwarf_version = 2; | |
024fa7dd | 3101 | |
9e09909d | 3102 | /* Do not allow unwind tables to be generated by default for m32. |
3103 | fnon-call-exceptions will override this, regardless of what we do. */ | |
3104 | if (generating_for_darwin_version < 10 | |
3105 | && !global_options_set.x_flag_asynchronous_unwind_tables | |
3106 | && !TARGET_64BIT) | |
3107 | global_options.x_flag_asynchronous_unwind_tables = 0; | |
3108 | ||
5886e9ab | 3109 | /* Disable -freorder-blocks-and-partition when unwind tables are being |
3110 | emitted for Darwin < 9 (OSX 10.5). | |
3111 | The strategy is, "Unless the User has specifically set/unset an unwind | |
3112 | flag we will switch off -freorder-blocks-and-partition when unwind tables | |
3113 | will be generated". If the User specifically sets flags... we assume | |
3114 | (s)he knows why... */ | |
3b3edcd4 | 3115 | if (generating_for_darwin_version < 9 |
9e09909d | 3116 | && global_options_set.x_flag_reorder_blocks_and_partition |
3117 | && ((global_options.x_flag_exceptions /* User, c++, java */ | |
3118 | && !global_options_set.x_flag_exceptions) /* User specified... */ | |
3119 | || (global_options.x_flag_unwind_tables | |
5886e9ab | 3120 | && !global_options_set.x_flag_unwind_tables) |
9e09909d | 3121 | || (global_options.x_flag_non_call_exceptions |
5886e9ab | 3122 | && !global_options_set.x_flag_non_call_exceptions) |
9e09909d | 3123 | || (global_options.x_flag_asynchronous_unwind_tables |
5886e9ab | 3124 | && !global_options_set.x_flag_asynchronous_unwind_tables))) |
3125 | { | |
3126 | inform (input_location, | |
3127 | "-freorder-blocks-and-partition does not work with exceptions " | |
3128 | "on this architecture"); | |
3129 | flag_reorder_blocks_and_partition = 0; | |
3130 | flag_reorder_blocks = 1; | |
3131 | } | |
14325167 | 3132 | |
c60ecc90 | 3133 | /* FIXME: flag_objc_sjlj_exceptions is no longer needed since there is only |
3134 | one valid choice of exception scheme for each runtime. */ | |
3135 | if (!global_options_set.x_flag_objc_sjlj_exceptions) | |
3136 | global_options.x_flag_objc_sjlj_exceptions = | |
3137 | flag_next_runtime && !TARGET_64BIT; | |
3138 | ||
3139 | /* FIXME: and this could be eliminated then too. */ | |
3140 | if (!global_options_set.x_flag_exceptions | |
3141 | && flag_objc_exceptions | |
3142 | && TARGET_64BIT) | |
3143 | flag_exceptions = 1; | |
3144 | ||
5b182752 | 3145 | if (flag_mkernel || flag_apple_kext) |
3146 | { | |
3147 | /* -mkernel implies -fapple-kext for C++ */ | |
3148 | if (strcmp (lang_hooks.name, "GNU C++") == 0) | |
3149 | flag_apple_kext = 1; | |
3150 | ||
3151 | flag_no_common = 1; | |
3152 | ||
3153 | /* No EH in kexts. */ | |
3154 | flag_exceptions = 0; | |
3155 | /* No -fnon-call-exceptions data in kexts. */ | |
3156 | flag_non_call_exceptions = 0; | |
8e79e9d4 | 3157 | /* so no tables either.. */ |
3158 | flag_unwind_tables = 0; | |
3159 | flag_asynchronous_unwind_tables = 0; | |
3cf7ab3b | 3160 | /* We still need to emit branch islands for kernel context. */ |
3161 | darwin_emit_branch_islands = true; | |
5b182752 | 3162 | } |
8e79e9d4 | 3163 | |
3e1cce93 | 3164 | if (flag_var_tracking_uninit == 0 |
f067760b | 3165 | && generating_for_darwin_version >= 9 |
3166 | && (flag_gtoggle ? (debug_info_level == DINFO_LEVEL_NONE) | |
3167 | : (debug_info_level >= DINFO_LEVEL_NORMAL)) | |
3168 | && write_symbols == DWARF2_DEBUG) | |
3e1cce93 | 3169 | flag_var_tracking_uninit = flag_var_tracking; |
3cf7ab3b | 3170 | |
90ff10b3 | 3171 | if (MACHO_DYNAMIC_NO_PIC_P) |
3172 | { | |
3173 | if (flag_pic) | |
b7d1dec3 | 3174 | warning_at (UNKNOWN_LOCATION, 0, |
3175 | "%<-mdynamic-no-pic%> overrides %<-fpic%>, %<-fPIC%>," | |
3176 | " %<-fpie%> or %<-fPIE%>"); | |
90ff10b3 | 3177 | flag_pic = 0; |
3178 | } | |
3179 | else if (flag_pic == 1) | |
3180 | { | |
3181 | /* Darwin's -fpic is -fPIC. */ | |
3182 | flag_pic = 2; | |
3183 | } | |
3184 | ||
3cf7ab3b | 3185 | /* It is assumed that branch island stubs are needed for earlier systems. */ |
9e09909d | 3186 | if (generating_for_darwin_version < 9) |
3cf7ab3b | 3187 | darwin_emit_branch_islands = true; |
8e79e9d4 | 3188 | else |
3189 | emit_aligned_common = true; /* Later systems can support aligned common. */ | |
d4238e8b | 3190 | |
3191 | /* The c_dialect...() macros are not available to us here. */ | |
3192 | darwin_running_cxx = (strstr (lang_hooks.name, "C++") != 0); | |
5b182752 | 3193 | } |
3194 | ||
8158aa7e | 3195 | #if DARWIN_PPC |
3196 | /* Add $LDBL128 suffix to long double builtins for ppc darwin. */ | |
6aee6ac8 | 3197 | |
3198 | static void | |
8158aa7e | 3199 | darwin_patch_builtin (enum built_in_function fncode) |
6aee6ac8 | 3200 | { |
b9a16870 | 3201 | tree fn = builtin_decl_explicit (fncode); |
6aee6ac8 | 3202 | tree sym; |
3203 | char *newname; | |
3204 | ||
3205 | if (!fn) | |
3206 | return; | |
3207 | ||
3208 | sym = DECL_ASSEMBLER_NAME (fn); | |
d243d9c9 | 3209 | newname = ACONCAT (("_", IDENTIFIER_POINTER (sym), "$LDBL128", NULL)); |
3210 | ||
6aee6ac8 | 3211 | set_user_assembler_name (fn, newname); |
6aee6ac8 | 3212 | |
b9a16870 | 3213 | fn = builtin_decl_implicit (fncode); |
6aee6ac8 | 3214 | if (fn) |
3215 | set_user_assembler_name (fn, newname); | |
6aee6ac8 | 3216 | } |
3217 | ||
3218 | void | |
3219 | darwin_patch_builtins (void) | |
3220 | { | |
3221 | if (LONG_DOUBLE_TYPE_SIZE != 128) | |
3222 | return; | |
3223 | ||
3224 | #define PATCH_BUILTIN(fncode) darwin_patch_builtin (fncode); | |
d243d9c9 | 3225 | #define PATCH_BUILTIN_NO64(fncode) \ |
3226 | if (!TARGET_64BIT) \ | |
6aee6ac8 | 3227 | darwin_patch_builtin (fncode); |
d243d9c9 | 3228 | #define PATCH_BUILTIN_VARIADIC(fncode) \ |
3229 | if (!TARGET_64BIT \ | |
6aee6ac8 | 3230 | && (strverscmp (darwin_macosx_version_min, "10.3.9") >= 0)) \ |
3231 | darwin_patch_builtin (fncode); | |
3232 | #include "darwin-ppc-ldouble-patch.def" | |
3233 | #undef PATCH_BUILTIN | |
3234 | #undef PATCH_BUILTIN_NO64 | |
3235 | #undef PATCH_BUILTIN_VARIADIC | |
3236 | } | |
8158aa7e | 3237 | #endif |
6aee6ac8 | 3238 | |
d4238e8b | 3239 | /* CFStrings implementation. */ |
3240 | static GTY(()) tree cfstring_class_reference = NULL_TREE; | |
3241 | static GTY(()) tree cfstring_type_node = NULL_TREE; | |
3242 | static GTY(()) tree ccfstring_type_node = NULL_TREE; | |
3243 | static GTY(()) tree pccfstring_type_node = NULL_TREE; | |
3244 | static GTY(()) tree pcint_type_node = NULL_TREE; | |
3245 | static GTY(()) tree pcchar_type_node = NULL_TREE; | |
3246 | ||
820c090b | 3247 | static enum built_in_function darwin_builtin_cfstring; |
d4238e8b | 3248 | |
3249 | /* Store all constructed constant CFStrings in a hash table so that | |
3250 | they get uniqued properly. */ | |
3251 | ||
3252 | typedef struct GTY (()) cfstring_descriptor { | |
3253 | /* The string literal. */ | |
3254 | tree literal; | |
3255 | /* The resulting constant CFString. */ | |
3256 | tree constructor; | |
3257 | } cfstring_descriptor; | |
3258 | ||
3259 | static GTY ((param_is (struct cfstring_descriptor))) htab_t cfstring_htab; | |
3260 | ||
3261 | static hashval_t cfstring_hash (const void *); | |
3262 | static int cfstring_eq (const void *, const void *); | |
3263 | ||
3264 | static tree | |
3265 | add_builtin_field_decl (tree type, const char *name, tree **chain) | |
3266 | { | |
3267 | tree field = build_decl (BUILTINS_LOCATION, FIELD_DECL, | |
3268 | get_identifier (name), type); | |
3269 | ||
3270 | if (*chain != NULL) | |
3271 | **chain = field; | |
3272 | *chain = &DECL_CHAIN (field); | |
3273 | ||
3274 | return field; | |
3275 | } | |
3276 | ||
820c090b | 3277 | tree |
3278 | darwin_init_cfstring_builtins (unsigned builtin_cfstring) | |
d4238e8b | 3279 | { |
3280 | tree cfsfun, fields, pccfstring_ftype_pcchar; | |
3281 | tree *chain = NULL; | |
3282 | ||
820c090b | 3283 | darwin_builtin_cfstring = |
3284 | (enum built_in_function) builtin_cfstring; | |
d4238e8b | 3285 | |
3286 | /* struct __builtin_CFString { | |
3287 | const int *isa; (will point at | |
3288 | int flags; __CFConstantStringClassReference) | |
3289 | const char *str; | |
3290 | long length; | |
3291 | }; */ | |
3292 | ||
3293 | pcint_type_node = build_pointer_type | |
3294 | (build_qualified_type (integer_type_node, TYPE_QUAL_CONST)); | |
3295 | ||
3296 | pcchar_type_node = build_pointer_type | |
3297 | (build_qualified_type (char_type_node, TYPE_QUAL_CONST)); | |
3298 | ||
3299 | cfstring_type_node = (*lang_hooks.types.make_type) (RECORD_TYPE); | |
3300 | ||
3301 | /* Have to build backwards for finish struct. */ | |
3302 | fields = add_builtin_field_decl (long_integer_type_node, "length", &chain); | |
3303 | add_builtin_field_decl (pcchar_type_node, "str", &chain); | |
3304 | add_builtin_field_decl (integer_type_node, "flags", &chain); | |
3305 | add_builtin_field_decl (pcint_type_node, "isa", &chain); | |
3306 | finish_builtin_struct (cfstring_type_node, "__builtin_CFString", | |
3307 | fields, NULL_TREE); | |
3308 | ||
3309 | /* const struct __builtin_CFstring * | |
3310 | __builtin___CFStringMakeConstantString (const char *); */ | |
3311 | ||
3312 | ccfstring_type_node = build_qualified_type | |
3313 | (cfstring_type_node, TYPE_QUAL_CONST); | |
3314 | pccfstring_type_node = build_pointer_type (ccfstring_type_node); | |
3315 | pccfstring_ftype_pcchar = build_function_type_list | |
3316 | (pccfstring_type_node, pcchar_type_node, NULL_TREE); | |
3317 | ||
3318 | cfsfun = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, | |
3319 | get_identifier ("__builtin___CFStringMakeConstantString"), | |
3320 | pccfstring_ftype_pcchar); | |
3321 | ||
3322 | TREE_PUBLIC (cfsfun) = 1; | |
3323 | DECL_EXTERNAL (cfsfun) = 1; | |
3324 | DECL_ARTIFICIAL (cfsfun) = 1; | |
3325 | /* Make a lang-specific section - dup_lang_specific_decl makes a new node | |
3326 | in place of the existing, which may be NULL. */ | |
3327 | DECL_LANG_SPECIFIC (cfsfun) = NULL; | |
3328 | (*lang_hooks.dup_lang_specific_decl) (cfsfun); | |
3329 | DECL_BUILT_IN_CLASS (cfsfun) = BUILT_IN_MD; | |
820c090b | 3330 | DECL_FUNCTION_CODE (cfsfun) = darwin_builtin_cfstring; |
d4238e8b | 3331 | lang_hooks.builtin_function (cfsfun); |
3332 | ||
3333 | /* extern int __CFConstantStringClassReference[]; */ | |
3334 | cfstring_class_reference = build_decl (BUILTINS_LOCATION, VAR_DECL, | |
3335 | get_identifier ("__CFConstantStringClassReference"), | |
3336 | build_array_type (integer_type_node, NULL_TREE)); | |
3337 | ||
3338 | TREE_PUBLIC (cfstring_class_reference) = 1; | |
3339 | DECL_ARTIFICIAL (cfstring_class_reference) = 1; | |
3340 | (*lang_hooks.decls.pushdecl) (cfstring_class_reference); | |
3341 | DECL_EXTERNAL (cfstring_class_reference) = 1; | |
3342 | rest_of_decl_compilation (cfstring_class_reference, 0, 0); | |
3343 | ||
3344 | /* Initialize the hash table used to hold the constant CFString objects. */ | |
3345 | cfstring_htab = htab_create_ggc (31, cfstring_hash, cfstring_eq, NULL); | |
820c090b | 3346 | |
3347 | return cfstring_type_node; | |
d4238e8b | 3348 | } |
3349 | ||
3350 | tree | |
3351 | darwin_fold_builtin (tree fndecl, int n_args, tree *argp, | |
3352 | bool ARG_UNUSED (ignore)) | |
3353 | { | |
3354 | unsigned int fcode = DECL_FUNCTION_CODE (fndecl); | |
3355 | ||
820c090b | 3356 | if (fcode == darwin_builtin_cfstring) |
d4238e8b | 3357 | { |
3358 | if (!darwin_constant_cfstrings) | |
3359 | { | |
3360 | error ("built-in function %qD requires the" | |
3361 | " %<-mconstant-cfstrings%> flag", fndecl); | |
3362 | return error_mark_node; | |
3363 | } | |
3364 | ||
3365 | if (n_args != 1) | |
3366 | { | |
3367 | error ("built-in function %qD takes one argument only", fndecl); | |
3368 | return error_mark_node; | |
3369 | } | |
3370 | ||
3371 | return darwin_build_constant_cfstring (*argp); | |
3372 | } | |
3373 | ||
3374 | return NULL_TREE; | |
3375 | } | |
3376 | ||
f6829196 | 3377 | void |
3378 | darwin_rename_builtins (void) | |
3379 | { | |
3380 | /* The system ___divdc3 routine in libSystem on darwin10 is not | |
3381 | accurate to 1ulp, ours is, so we avoid ever using the system name | |
3382 | for this routine and instead install a non-conflicting name that | |
3383 | is accurate. | |
3384 | ||
3385 | When -ffast-math or -funsafe-math-optimizations is given, we can | |
3386 | use the faster version. */ | |
3387 | if (!flag_unsafe_math_optimizations) | |
3388 | { | |
b9a16870 | 3389 | enum built_in_function dcode |
3390 | = (enum built_in_function)(BUILT_IN_COMPLEX_DIV_MIN | |
3391 | + DCmode - MIN_MODE_COMPLEX_FLOAT); | |
3392 | tree fn = builtin_decl_explicit (dcode); | |
f6829196 | 3393 | /* Fortran and c call TARGET_INIT_BUILTINS and |
3394 | TARGET_INIT_LIBFUNCS at different times, so we have to put a | |
3395 | call into each to ensure that at least one of them is called | |
3396 | after build_common_builtin_nodes. A better fix is to add a | |
3397 | new hook to run after build_common_builtin_nodes runs. */ | |
3398 | if (fn) | |
3399 | set_user_assembler_name (fn, "___ieee_divdc3"); | |
b9a16870 | 3400 | fn = builtin_decl_implicit (dcode); |
f6829196 | 3401 | if (fn) |
3402 | set_user_assembler_name (fn, "___ieee_divdc3"); | |
3403 | } | |
3404 | } | |
3405 | ||
30f690e0 | 3406 | bool |
3407 | darwin_libc_has_function (enum function_class fn_class) | |
3408 | { | |
3409 | if (fn_class == function_sincos) | |
3410 | return false; | |
3411 | if (fn_class == function_c99_math_complex | |
3412 | || fn_class == function_c99_misc) | |
3413 | return (TARGET_64BIT | |
3414 | || strverscmp (darwin_macosx_version_min, "10.3") >= 0); | |
3415 | ||
3416 | return true; | |
3417 | } | |
3418 | ||
d4238e8b | 3419 | static hashval_t |
3420 | cfstring_hash (const void *ptr) | |
3421 | { | |
3422 | tree str = ((const struct cfstring_descriptor *)ptr)->literal; | |
3423 | const unsigned char *p = (const unsigned char *) TREE_STRING_POINTER (str); | |
3424 | int i, len = TREE_STRING_LENGTH (str); | |
3425 | hashval_t h = len; | |
3426 | ||
3427 | for (i = 0; i < len; i++) | |
3428 | h = ((h * 613) + p[i]); | |
3429 | ||
3430 | return h; | |
3431 | } | |
3432 | ||
3433 | static int | |
3434 | cfstring_eq (const void *ptr1, const void *ptr2) | |
3435 | { | |
3436 | tree str1 = ((const struct cfstring_descriptor *)ptr1)->literal; | |
3437 | tree str2 = ((const struct cfstring_descriptor *)ptr2)->literal; | |
3438 | int len1 = TREE_STRING_LENGTH (str1); | |
3439 | ||
3440 | return (len1 == TREE_STRING_LENGTH (str2) | |
3441 | && !memcmp (TREE_STRING_POINTER (str1), TREE_STRING_POINTER (str2), | |
3442 | len1)); | |
3443 | } | |
3444 | ||
3445 | tree | |
3446 | darwin_build_constant_cfstring (tree str) | |
3447 | { | |
3448 | struct cfstring_descriptor *desc, key; | |
3449 | void **loc; | |
3450 | tree addr; | |
3451 | ||
3452 | if (!str) | |
3453 | { | |
3454 | error ("CFString literal is missing"); | |
3455 | return error_mark_node; | |
3456 | } | |
3457 | ||
3458 | STRIP_NOPS (str); | |
3459 | ||
3460 | if (TREE_CODE (str) == ADDR_EXPR) | |
3461 | str = TREE_OPERAND (str, 0); | |
3462 | ||
3463 | if (TREE_CODE (str) != STRING_CST) | |
3464 | { | |
3465 | error ("CFString literal expression is not a string constant"); | |
3466 | return error_mark_node; | |
3467 | } | |
3468 | ||
3469 | /* Perhaps we already constructed a constant CFString just like this one? */ | |
3470 | key.literal = str; | |
3471 | loc = htab_find_slot (cfstring_htab, &key, INSERT); | |
3472 | desc = (struct cfstring_descriptor *) *loc; | |
3473 | ||
3474 | if (!desc) | |
3475 | { | |
3476 | tree var, constructor, field; | |
f1f41a6c | 3477 | vec<constructor_elt, va_gc> *v = NULL; |
d4238e8b | 3478 | int length = TREE_STRING_LENGTH (str) - 1; |
3479 | ||
3480 | if (darwin_warn_nonportable_cfstrings) | |
3481 | { | |
3482 | const char *s = TREE_STRING_POINTER (str); | |
3483 | int l = 0; | |
3484 | ||
3485 | for (l = 0; l < length; l++) | |
3486 | if (!s[l] || !isascii (s[l])) | |
3487 | { | |
3488 | warning (darwin_warn_nonportable_cfstrings, "%s in CFString literal", | |
3489 | s[l] ? "non-ASCII character" : "embedded NUL"); | |
3490 | break; | |
3491 | } | |
3492 | } | |
3493 | ||
3494 | *loc = desc = ggc_alloc_cleared_cfstring_descriptor (); | |
3495 | desc->literal = str; | |
3496 | ||
3497 | /* isa *. */ | |
3498 | field = TYPE_FIELDS (ccfstring_type_node); | |
3499 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, | |
3500 | build1 (ADDR_EXPR, TREE_TYPE (field), | |
3501 | cfstring_class_reference)); | |
3502 | /* flags */ | |
3503 | field = DECL_CHAIN (field); | |
3504 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, | |
3505 | build_int_cst (TREE_TYPE (field), 0x000007c8)); | |
3506 | /* string *. */ | |
3507 | field = DECL_CHAIN (field); | |
3508 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, | |
3509 | build1 (ADDR_EXPR, TREE_TYPE (field), str)); | |
3510 | /* length */ | |
3511 | field = DECL_CHAIN (field); | |
3512 | CONSTRUCTOR_APPEND_ELT(v, NULL_TREE, | |
3513 | build_int_cst (TREE_TYPE (field), length)); | |
3514 | ||
3515 | constructor = build_constructor (ccfstring_type_node, v); | |
3516 | TREE_READONLY (constructor) = 1; | |
3517 | TREE_CONSTANT (constructor) = 1; | |
3518 | TREE_STATIC (constructor) = 1; | |
3519 | ||
3520 | /* Fromage: The C++ flavor of 'build_unary_op' expects constructor nodes | |
3521 | to have the TREE_HAS_CONSTRUCTOR (...) bit set. However, this file is | |
3522 | being built without any knowledge of C++ tree accessors; hence, we shall | |
3523 | use the generic accessor that TREE_HAS_CONSTRUCTOR actually maps to! */ | |
3524 | if (darwin_running_cxx) | |
3525 | TREE_LANG_FLAG_4 (constructor) = 1; /* TREE_HAS_CONSTRUCTOR */ | |
3526 | ||
3527 | /* Create an anonymous global variable for this CFString. */ | |
3528 | var = build_decl (input_location, CONST_DECL, | |
3529 | NULL, TREE_TYPE (constructor)); | |
3530 | DECL_ARTIFICIAL (var) = 1; | |
3531 | TREE_STATIC (var) = 1; | |
3532 | DECL_INITIAL (var) = constructor; | |
3533 | /* FIXME: This should use a translation_unit_decl to indicate file scope. */ | |
3534 | DECL_CONTEXT (var) = NULL_TREE; | |
3535 | desc->constructor = var; | |
3536 | } | |
3537 | ||
3538 | addr = build1 (ADDR_EXPR, pccfstring_type_node, desc->constructor); | |
3539 | TREE_CONSTANT (addr) = 1; | |
3540 | ||
3541 | return addr; | |
3542 | } | |
3543 | ||
3544 | bool | |
3545 | darwin_cfstring_p (tree str) | |
3546 | { | |
3547 | struct cfstring_descriptor key; | |
3548 | void **loc; | |
3549 | ||
3550 | if (!str) | |
3551 | return false; | |
3552 | ||
3553 | STRIP_NOPS (str); | |
3554 | ||
3555 | if (TREE_CODE (str) == ADDR_EXPR) | |
3556 | str = TREE_OPERAND (str, 0); | |
3557 | ||
3558 | if (TREE_CODE (str) != STRING_CST) | |
3559 | return false; | |
3560 | ||
3561 | key.literal = str; | |
3562 | loc = htab_find_slot (cfstring_htab, &key, NO_INSERT); | |
3563 | ||
3564 | if (loc) | |
3565 | return true; | |
3566 | ||
3567 | return false; | |
3568 | } | |
3569 | ||
3570 | void | |
3571 | darwin_enter_string_into_cfstring_table (tree str) | |
3572 | { | |
3573 | struct cfstring_descriptor key; | |
3574 | void **loc; | |
3575 | ||
3576 | key.literal = str; | |
3577 | loc = htab_find_slot (cfstring_htab, &key, INSERT); | |
3578 | ||
3579 | if (!*loc) | |
3580 | { | |
3581 | *loc = ggc_alloc_cleared_cfstring_descriptor (); | |
3582 | ((struct cfstring_descriptor *)*loc)->literal = str; | |
3583 | } | |
3584 | } | |
6aee6ac8 | 3585 | |
3b73548b | 3586 | /* Choose named function section based on its frequency. */ |
3587 | ||
3588 | section * | |
3589 | darwin_function_section (tree decl, enum node_frequency freq, | |
3590 | bool startup, bool exit) | |
3591 | { | |
9e09909d | 3592 | /* Decide if we need to put this in a coalescable section. */ |
3593 | bool weak = (decl | |
3594 | && DECL_WEAK (decl) | |
3595 | && (!DECL_ATTRIBUTES (decl) | |
3596 | || !lookup_attribute ("weak_import", | |
3597 | DECL_ATTRIBUTES (decl)))); | |
3598 | ||
3599 | /* If there is a specified section name, we should not be trying to | |
3600 | override. */ | |
3601 | if (decl && DECL_SECTION_NAME (decl) != NULL_TREE) | |
3602 | return get_named_section (decl, NULL, 0); | |
3603 | ||
3604 | /* Default when there is no function re-ordering. */ | |
dc4b309b | 3605 | if (!flag_reorder_functions) |
9e09909d | 3606 | return (weak) |
3607 | ? darwin_sections[text_coal_section] | |
3608 | : text_section; | |
3609 | ||
3b73548b | 3610 | /* Startup code should go to startup subsection unless it is |
3611 | unlikely executed (this happens especially with function splitting | |
9d75589a | 3612 | where we can split away unnecessary parts of static constructors). */ |
3b73548b | 3613 | if (startup && freq != NODE_FREQUENCY_UNLIKELY_EXECUTED) |
9e09909d | 3614 | return (weak) |
3615 | ? darwin_sections[text_startup_coal_section] | |
3616 | : darwin_sections[text_startup_section]; | |
3b73548b | 3617 | |
3618 | /* Similarly for exit. */ | |
3619 | if (exit && freq != NODE_FREQUENCY_UNLIKELY_EXECUTED) | |
9e09909d | 3620 | return (weak) |
3621 | ? darwin_sections[text_exit_coal_section] | |
3622 | : darwin_sections[text_exit_section]; | |
3b73548b | 3623 | |
3624 | /* Group cold functions together, similarly for hot code. */ | |
3625 | switch (freq) | |
3626 | { | |
3627 | case NODE_FREQUENCY_UNLIKELY_EXECUTED: | |
9e09909d | 3628 | return (weak) |
3629 | ? darwin_sections[text_cold_coal_section] | |
3630 | : darwin_sections[text_cold_section]; | |
3631 | break; | |
3b73548b | 3632 | case NODE_FREQUENCY_HOT: |
9e09909d | 3633 | return (weak) |
3634 | ? darwin_sections[text_hot_coal_section] | |
3635 | : darwin_sections[text_hot_section]; | |
3636 | break; | |
3b73548b | 3637 | default: |
9e09909d | 3638 | return (weak) |
3639 | ? darwin_sections[text_coal_section] | |
3640 | : text_section; | |
3641 | break; | |
3b73548b | 3642 | } |
3643 | } | |
3644 | ||
3b3edcd4 | 3645 | /* When a function is partitioned between sections, we need to insert a label |
3646 | at the start of each new chunk - so that it may become a valid 'atom' for | |
3647 | eh and debug purposes. Without this the linker will emit warnings if one | |
3648 | tries to add line location information (since the switched fragment will | |
3649 | be anonymous). */ | |
3650 | ||
3651 | void | |
3652 | darwin_function_switched_text_sections (FILE *fp, tree decl, bool new_is_cold) | |
3653 | { | |
3654 | char buf[128]; | |
3655 | snprintf (buf, 128, "%s%s",new_is_cold?"__cold_sect_of_":"__hot_sect_of_", | |
3656 | IDENTIFIER_POINTER (DECL_NAME (decl))); | |
3657 | /* Make sure we pick up all the relevant quotes etc. */ | |
3658 | assemble_name_raw (fp, (const char *) buf); | |
3659 | fputs (":\n", fp); | |
3660 | } | |
3661 | ||
1f3233d1 | 3662 | #include "gt-darwin.h" |