1 /* Functions for generic Darwin as target machine for GNU C compiler.
2 Copyright (C) 1989-2013 Free Software Foundation, Inc.
3 Contributed by Apple Computer Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GCC is distributed in the hope that it will be useful,
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.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
27 #include "hard-reg-set.h"
28 #include "insn-config.h"
29 #include "conditions.h"
30 #include "insn-flags.h"
32 #include "insn-attr.h"
39 #include "langhooks.h"
42 #include "diagnostic-core.h"
48 #include "lto-streamer.h"
50 /* Darwin supports a feature called fix-and-continue, which is used
51 for rapid turn around debugging. When code is compiled with the
52 -mfix-and-continue flag, two changes are made to the generated code
53 that allow the system to do things that it would normally not be
54 able to do easily. These changes allow gdb to load in
55 recompilation of a translation unit that has been changed into a
56 running program and replace existing functions and methods of that
57 translation unit with versions of those functions and methods
58 from the newly compiled translation unit. The new functions access
59 the existing static symbols from the old translation unit, if the
60 symbol existed in the unit to be replaced, and from the new
61 translation unit, otherwise.
63 The changes are to insert 5 nops at the beginning of all functions
64 and to use indirection to get at static symbols. The 5 nops
65 are required by consumers of the generated code. Currently, gdb
66 uses this to patch in a jump to the overriding function, this
67 allows all uses of the old name to forward to the replacement,
68 including existing function pointers and virtual methods. See
69 rs6000_emit_prologue for the code that handles the nop insertions.
71 The added indirection allows gdb to redirect accesses to static
72 symbols from the newly loaded translation unit to the existing
73 symbol, if any. @code{static} symbols are special and are handled by
74 setting the second word in the .non_lazy_symbol_pointer data
75 structure to symbol. See indirect_data for the code that handles
76 the extra indirection, and machopic_output_indirection and its use
77 of MACHO_SYMBOL_STATIC for the code that handles @code{static}
78 symbol indirection. */
80 /* For darwin >= 9 (OSX 10.5) the linker is capable of making the necessary
81 branch islands and we no longer need to emit darwin stubs.
82 However, if we are generating code for earlier systems (or for use in the
83 kernel) the stubs might still be required, and this will be set true. */
84 int darwin_emit_branch_islands
= false;
86 typedef struct GTY(()) cdtor_record
{
88 int priority
; /* [con/de]structor priority */
89 int position
; /* original position */
92 static GTY(()) vec
<cdtor_record
, va_gc
> *ctors
= NULL
;
93 static GTY(()) vec
<cdtor_record
, va_gc
> *dtors
= NULL
;
95 /* A flag to determine whether we are running c++ or obj-c++. This has to be
96 settable from non-c-family contexts too (i.e. we can't use the c_dialect_
98 int darwin_running_cxx
;
100 /* Some code-gen now depends on OS major version numbers (at least). */
101 int generating_for_darwin_version
;
104 section
* darwin_sections
[NUM_DARWIN_SECTIONS
];
106 /* While we transition to using in-tests instead of ifdef'd code. */
108 #define HAVE_lo_sum 0
109 #define gen_macho_high(a,b) (a)
110 #define gen_macho_low(a,b,c) (a)
113 /* True if we're setting __attribute__ ((ms_struct)). */
114 int darwin_ms_struct
= false;
116 /* Earlier versions of Darwin as do not recognize an alignment field in
117 .comm directives, this should be set for versions that allow it. */
118 int emit_aligned_common
= false;
120 /* A get_unnamed_section callback used to switch to an ObjC section.
121 DIRECTIVE is as for output_section_asm_op. */
124 output_objc_section_asm_op (const void *directive
)
126 static bool been_here
= false;
128 /* The NeXT ObjC Runtime requires these sections to be present and in
129 order in the object. The code below implements this by emitting
130 a section header for each ObjC section the first time that an ObjC
131 section is requested. */
134 section
*saved_in_section
= in_section
;
135 static const enum darwin_section_enum tomark
[] =
137 /* written, cold -> hot */
138 objc_cat_cls_meth_section
,
139 objc_cat_inst_meth_section
,
140 objc_string_object_section
,
141 objc_constant_string_object_section
,
142 objc_selector_refs_section
,
143 objc_selector_fixup_section
,
144 objc_cls_refs_section
,
146 objc_meta_class_section
,
147 /* shared, hot -> cold */
148 objc_cls_meth_section
,
149 objc_inst_meth_section
,
150 objc_protocol_section
,
151 objc_class_names_section
,
152 objc_meth_var_types_section
,
153 objc_meth_var_names_section
,
154 objc_category_section
,
155 objc_class_vars_section
,
156 objc_instance_vars_section
,
157 objc_module_info_section
,
158 objc_symbols_section
,
161 static const enum darwin_section_enum tomarkv1
[] =
163 objc1_protocol_ext_section
,
164 objc1_class_ext_section
,
165 objc1_prop_list_section
168 static const enum darwin_section_enum tomarkv2
[] =
170 objc2_message_refs_section
,
171 objc2_classdefs_section
,
172 objc2_metadata_section
,
173 objc2_classrefs_section
,
174 objc2_classlist_section
,
175 objc2_categorylist_section
,
176 objc2_selector_refs_section
,
177 objc2_nonlazy_class_section
,
178 objc2_nonlazy_category_section
,
179 objc2_protocollist_section
,
180 objc2_protocolrefs_section
,
181 objc2_super_classrefs_section
,
182 objc2_image_info_section
,
183 objc2_constant_string_object_section
188 if (flag_objc_abi
< 2)
190 for (i
= 0; i
< ARRAY_SIZE (tomark
); i
++)
191 switch_to_section (darwin_sections
[tomark
[i
]]);
192 if (flag_objc_abi
== 1)
193 for (i
= 0; i
< ARRAY_SIZE (tomarkv1
); i
++)
194 switch_to_section (darwin_sections
[tomarkv1
[i
]]);
197 for (i
= 0; i
< ARRAY_SIZE (tomarkv2
); i
++)
198 switch_to_section (darwin_sections
[tomarkv2
[i
]]);
199 /* Make sure we don't get varasm.c out of sync with us. */
200 switch_to_section (saved_in_section
);
202 output_section_asm_op (directive
);
206 /* Private flag applied to disable section-anchors in a particular section. */
207 #define SECTION_NO_ANCHOR SECTION_MACH_DEP
210 /* Implement TARGET_ASM_INIT_SECTIONS. */
213 darwin_init_sections (void)
215 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) \
216 darwin_sections[NAME] = \
217 get_unnamed_section (FLAGS, (OBJC \
218 ? output_objc_section_asm_op \
219 : output_section_asm_op), \
221 #include "config/darwin-sections.def"
224 readonly_data_section
= darwin_sections
[const_section
];
225 exception_section
= darwin_sections
[darwin_exception_section
];
226 eh_frame_section
= darwin_sections
[darwin_eh_frame_section
];
230 name_needs_quotes (const char *name
)
233 while ((c
= *name
++) != '\0')
235 && c
!= '.' && c
!= '$' && c
!= '_' )
240 /* Return true if SYM_REF can be used without an indirection. */
242 machopic_symbol_defined_p (rtx sym_ref
)
244 if (SYMBOL_REF_FLAGS (sym_ref
) & MACHO_SYMBOL_FLAG_DEFINED
)
247 /* If a symbol references local and is not an extern to this
248 file, then the symbol might be able to declared as defined. */
249 if (SYMBOL_REF_LOCAL_P (sym_ref
) && ! SYMBOL_REF_EXTERNAL_P (sym_ref
))
251 /* If the symbol references a variable and the variable is a
252 common symbol, then this symbol is not defined. */
253 if (SYMBOL_REF_FLAGS (sym_ref
) & MACHO_SYMBOL_FLAG_VARIABLE
)
255 tree decl
= SYMBOL_REF_DECL (sym_ref
);
258 if (DECL_COMMON (decl
))
266 /* This module assumes that (const (symbol_ref "foo")) is a legal pic
267 reference, which will not be changed. */
269 enum machopic_addr_class
270 machopic_classify_symbol (rtx sym_ref
)
274 function_p
= SYMBOL_REF_FUNCTION_P (sym_ref
);
275 if (machopic_symbol_defined_p (sym_ref
))
277 ? MACHOPIC_DEFINED_FUNCTION
: MACHOPIC_DEFINED_DATA
);
280 ? MACHOPIC_UNDEFINED_FUNCTION
: MACHOPIC_UNDEFINED_DATA
);
283 #ifndef TARGET_FIX_AND_CONTINUE
284 #define TARGET_FIX_AND_CONTINUE 0
287 /* Indicate when fix-and-continue style code generation is being used
288 and when a reference to data should be indirected so that it can be
289 rebound in a new translation unit to reference the original instance
290 of that data. Symbol names that are for code generation local to
291 the translation unit are bound to the new translation unit;
292 currently this means symbols that begin with L or _OBJC_;
293 otherwise, we indicate that an indirect reference should be made to
294 permit the runtime to rebind new instances of the translation unit
295 to the original instance of the data. */
298 indirect_data (rtx sym_ref
)
303 /* If we aren't generating fix-and-continue code, don't do anything
305 if (TARGET_FIX_AND_CONTINUE
== 0)
308 /* Otherwise, all symbol except symbols that begin with L or _OBJC_
309 are indirected. Symbols that begin with L and _OBJC_ are always
310 bound to the current translation unit as they are used for
311 generated local data of the translation unit. */
313 name
= XSTR (sym_ref
, 0);
315 lprefix
= (((name
[0] == '*' || name
[0] == '&')
316 && (name
[1] == 'L' || (name
[1] == '"' && name
[2] == 'L')))
317 || (strncmp (name
, "_OBJC_", 6) == 0));
323 machopic_data_defined_p (rtx sym_ref
)
325 if (indirect_data (sym_ref
))
328 switch (machopic_classify_symbol (sym_ref
))
330 case MACHOPIC_DEFINED_DATA
:
331 case MACHOPIC_DEFINED_FUNCTION
:
339 machopic_define_symbol (rtx mem
)
343 gcc_assert (GET_CODE (mem
) == MEM
);
344 sym_ref
= XEXP (mem
, 0);
345 SYMBOL_REF_FLAGS (sym_ref
) |= MACHO_SYMBOL_FLAG_DEFINED
;
348 /* Return either ORIG or:
350 (const:P (unspec:P [ORIG] UNSPEC_MACHOPIC_OFFSET))
352 depending on MACHO_DYNAMIC_NO_PIC_P. */
354 machopic_gen_offset (rtx orig
)
356 if (MACHO_DYNAMIC_NO_PIC_P
)
360 /* Play games to avoid marking the function as needing pic if we
361 are being called as part of the cost-estimation process. */
362 if (current_ir_type () != IR_GIMPLE
|| currently_expanding_to_rtl
)
363 crtl
->uses_pic_offset_table
= 1;
364 orig
= gen_rtx_UNSPEC (Pmode
, gen_rtvec (1, orig
),
365 UNSPEC_MACHOPIC_OFFSET
);
366 return gen_rtx_CONST (Pmode
, orig
);
370 static GTY(()) const char * function_base_func_name
;
371 static GTY(()) int current_pic_label_num
;
372 static GTY(()) int emitted_pic_label_num
;
375 update_pic_label_number_if_needed (void)
377 const char *current_name
;
379 /* When we are generating _get_pc thunks within stubs, there is no current
381 if (current_function_decl
)
384 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl
));
385 if (function_base_func_name
!= current_name
)
387 ++current_pic_label_num
;
388 function_base_func_name
= current_name
;
393 ++current_pic_label_num
;
394 function_base_func_name
= "L_machopic_stub_dummy";
399 machopic_output_function_base_name (FILE *file
)
401 /* If dynamic-no-pic is on, we should not get here. */
402 gcc_assert (!MACHO_DYNAMIC_NO_PIC_P
);
404 update_pic_label_number_if_needed ();
405 fprintf (file
, "L%d$pb", current_pic_label_num
);
408 char curr_picbasename
[32];
411 machopic_get_function_picbase (void)
413 /* If dynamic-no-pic is on, we should not get here. */
414 gcc_assert (!MACHO_DYNAMIC_NO_PIC_P
);
416 update_pic_label_number_if_needed ();
417 snprintf (curr_picbasename
, 32, "L%d$pb", current_pic_label_num
);
418 return (const char *) curr_picbasename
;
422 machopic_should_output_picbase_label (void)
424 update_pic_label_number_if_needed ();
426 if (current_pic_label_num
== emitted_pic_label_num
)
429 emitted_pic_label_num
= current_pic_label_num
;
433 /* The suffix attached to non-lazy pointer symbols. */
434 #define NON_LAZY_POINTER_SUFFIX "$non_lazy_ptr"
435 /* The suffix attached to stub symbols. */
436 #define STUB_SUFFIX "$stub"
438 typedef struct GTY (()) machopic_indirection
440 /* The SYMBOL_REF for the entity referenced. */
442 /* The name of the stub or non-lazy pointer. */
443 const char * ptr_name
;
444 /* True iff this entry is for a stub (as opposed to a non-lazy
447 /* True iff this stub or pointer pointer has been referenced. */
449 } machopic_indirection
;
451 /* A table mapping stub names and non-lazy pointer names to
452 SYMBOL_REFs for the stubbed-to and pointed-to entities. */
454 static GTY ((param_is (struct machopic_indirection
))) htab_t
455 machopic_indirections
;
457 /* Return a hash value for a SLOT in the indirections hash table. */
460 machopic_indirection_hash (const void *slot
)
462 const machopic_indirection
*p
= (const machopic_indirection
*) slot
;
463 return htab_hash_string (p
->ptr_name
);
466 /* Returns true if the KEY is the same as that associated with
470 machopic_indirection_eq (const void *slot
, const void *key
)
472 return strcmp (((const machopic_indirection
*) slot
)->ptr_name
,
473 (const char *) key
) == 0;
476 /* Return the name of the non-lazy pointer (if STUB_P is false) or
477 stub (if STUB_B is true) corresponding to the given name. */
480 machopic_indirection_name (rtx sym_ref
, bool stub_p
)
483 const char *name
= XSTR (sym_ref
, 0);
484 size_t namelen
= strlen (name
);
485 machopic_indirection
*p
;
489 const char *prefix
= user_label_prefix
;
490 const char *quote
= "";
493 id
= maybe_get_identifier (name
);
498 while (IDENTIFIER_TRANSPARENT_ALIAS (id
))
499 id
= TREE_CHAIN (id
);
502 name
= IDENTIFIER_POINTER (id
);
503 namelen
= strlen (name
);
514 needs_quotes
= name_needs_quotes (name
);
521 suffix
= STUB_SUFFIX
;
523 suffix
= NON_LAZY_POINTER_SUFFIX
;
525 buffer
= XALLOCAVEC (char, strlen ("&L")
532 /* Construct the name of the non-lazy pointer or stub. */
533 sprintf (buffer
, "&%sL%s%s%s%s", quote
, prefix
, name
, suffix
, quote
);
535 if (!machopic_indirections
)
536 machopic_indirections
= htab_create_ggc (37,
537 machopic_indirection_hash
,
538 machopic_indirection_eq
,
541 slot
= htab_find_slot_with_hash (machopic_indirections
, buffer
,
542 htab_hash_string (buffer
), INSERT
);
545 p
= (machopic_indirection
*) *slot
;
549 p
= ggc_alloc_machopic_indirection ();
551 p
->ptr_name
= xstrdup (buffer
);
560 /* Return the name of the stub for the mcount function. */
563 machopic_mcount_stub_name (void)
565 rtx symbol
= gen_rtx_SYMBOL_REF (Pmode
, "*mcount");
566 return machopic_indirection_name (symbol
, /*stub_p=*/true);
569 /* If NAME is the name of a stub or a non-lazy pointer , mark the stub
570 or non-lazy pointer as used -- and mark the object to which the
571 pointer/stub refers as used as well, since the pointer/stub will
572 emit a reference to it. */
575 machopic_validate_stub_or_non_lazy_ptr (const char *name
)
577 machopic_indirection
*p
;
579 p
= ((machopic_indirection
*)
580 (htab_find_with_hash (machopic_indirections
, name
,
581 htab_hash_string (name
))));
584 const char *real_name
;
589 /* Do what output_addr_const will do when we actually call it. */
590 if (SYMBOL_REF_DECL (p
->symbol
))
591 mark_decl_referenced (SYMBOL_REF_DECL (p
->symbol
));
593 real_name
= targetm
.strip_name_encoding (XSTR (p
->symbol
, 0));
595 id
= maybe_get_identifier (real_name
);
597 mark_referenced (id
);
601 /* Transform ORIG, which may be any data source, to the corresponding
602 source using indirections. */
605 machopic_indirect_data_reference (rtx orig
, rtx reg
)
609 if (! MACHOPIC_INDIRECT
)
612 if (GET_CODE (orig
) == SYMBOL_REF
)
614 int defined
= machopic_data_defined_p (orig
);
616 if (defined
&& MACHO_DYNAMIC_NO_PIC_P
)
620 /* Create a new register for CSE opportunities. */
621 rtx hi_reg
= (!can_create_pseudo_p () ? reg
: gen_reg_rtx (Pmode
));
622 emit_insn (gen_macho_high (hi_reg
, orig
));
623 emit_insn (gen_macho_low (reg
, hi_reg
, orig
));
629 /* some other cpu -- writeme! */
635 if (DARWIN_PPC
|| HAVE_lo_sum
)
636 offset
= machopic_gen_offset (orig
);
640 rtx hi_sum_reg
= (!can_create_pseudo_p ()
642 : gen_reg_rtx (Pmode
));
646 emit_insn (gen_rtx_SET (Pmode
, hi_sum_reg
,
647 gen_rtx_PLUS (Pmode
, pic_offset_table_rtx
,
648 gen_rtx_HIGH (Pmode
, offset
))));
649 emit_insn (gen_rtx_SET (Pmode
, reg
,
650 gen_rtx_LO_SUM (Pmode
, hi_sum_reg
,
651 copy_rtx (offset
))));
655 else if (HAVE_lo_sum
)
659 emit_insn (gen_rtx_SET (VOIDmode
, reg
,
660 gen_rtx_HIGH (Pmode
, offset
)));
661 emit_insn (gen_rtx_SET (VOIDmode
, reg
,
662 gen_rtx_LO_SUM (Pmode
, reg
,
663 copy_rtx (offset
))));
664 emit_use (pic_offset_table_rtx
);
666 orig
= gen_rtx_PLUS (Pmode
, pic_offset_table_rtx
, reg
);
671 ptr_ref
= (gen_rtx_SYMBOL_REF
673 machopic_indirection_name (orig
, /*stub_p=*/false)));
675 SYMBOL_REF_DATA (ptr_ref
) = SYMBOL_REF_DATA (orig
);
677 ptr_ref
= gen_const_mem (Pmode
, ptr_ref
);
678 machopic_define_symbol (ptr_ref
);
682 && MACHO_DYNAMIC_NO_PIC_P
)
684 emit_insn (gen_rtx_SET (Pmode
, reg
, ptr_ref
));
690 else if (GET_CODE (orig
) == CONST
)
692 /* If "(const (plus ...", walk the PLUS and return that result.
693 PLUS processing (below) will restore the "(const ..." if
695 if (GET_CODE (XEXP (orig
, 0)) == PLUS
)
696 return machopic_indirect_data_reference (XEXP (orig
, 0), reg
);
700 else if (GET_CODE (orig
) == MEM
)
703 machopic_indirect_data_reference (XEXP (orig
, 0), reg
);
706 else if (GET_CODE (orig
) == PLUS
)
709 /* When the target is i386, this code prevents crashes due to the
710 compiler's ignorance on how to move the PIC base register to
711 other registers. (The reload phase sometimes introduces such
713 if (GET_CODE (XEXP (orig
, 0)) == REG
714 && REGNO (XEXP (orig
, 0)) == PIC_OFFSET_TABLE_REGNUM
715 /* Prevent the same register from being erroneously used
716 as both the base and index registers. */
717 && (DARWIN_X86
&& (GET_CODE (XEXP (orig
, 1)) == CONST
))
720 emit_move_insn (reg
, XEXP (orig
, 0));
721 XEXP (ptr_ref
, 0) = reg
;
725 /* Legitimize both operands of the PLUS. */
726 base
= machopic_indirect_data_reference (XEXP (orig
, 0), reg
);
727 orig
= machopic_indirect_data_reference (XEXP (orig
, 1),
728 (base
== reg
? 0 : reg
));
729 if (MACHOPIC_INDIRECT
&& (GET_CODE (orig
) == CONST_INT
))
730 result
= plus_constant (Pmode
, base
, INTVAL (orig
));
732 result
= gen_rtx_PLUS (Pmode
, base
, orig
);
734 if (MACHOPIC_JUST_INDIRECT
&& GET_CODE (base
) == MEM
)
738 emit_move_insn (reg
, result
);
743 result
= force_reg (GET_MODE (result
), result
);
752 /* Transform TARGET (a MEM), which is a function call target, to the
753 corresponding symbol_stub if necessary. Return a new MEM. */
756 machopic_indirect_call_target (rtx target
)
758 if (! darwin_emit_branch_islands
)
761 if (GET_CODE (target
) != MEM
)
764 if (MACHOPIC_INDIRECT
765 && GET_CODE (XEXP (target
, 0)) == SYMBOL_REF
766 && !(SYMBOL_REF_FLAGS (XEXP (target
, 0))
767 & MACHO_SYMBOL_FLAG_DEFINED
))
769 rtx sym_ref
= XEXP (target
, 0);
770 const char *stub_name
= machopic_indirection_name (sym_ref
,
772 enum machine_mode mode
= GET_MODE (sym_ref
);
774 XEXP (target
, 0) = gen_rtx_SYMBOL_REF (mode
, stub_name
);
775 SYMBOL_REF_DATA (XEXP (target
, 0)) = SYMBOL_REF_DATA (sym_ref
);
776 MEM_READONLY_P (target
) = 1;
777 MEM_NOTRAP_P (target
) = 1;
784 machopic_legitimize_pic_address (rtx orig
, enum machine_mode mode
, rtx reg
)
788 if (! MACHOPIC_INDIRECT
)
791 /* First handle a simple SYMBOL_REF or LABEL_REF */
792 if (GET_CODE (orig
) == LABEL_REF
793 || (GET_CODE (orig
) == SYMBOL_REF
796 /* addr(foo) = &func+(foo-func) */
797 orig
= machopic_indirect_data_reference (orig
, reg
);
799 if (GET_CODE (orig
) == PLUS
800 && GET_CODE (XEXP (orig
, 0)) == REG
)
803 return force_reg (mode
, orig
);
805 emit_move_insn (reg
, orig
);
809 if (GET_CODE (orig
) == MEM
)
813 gcc_assert (!reload_in_progress
);
814 reg
= gen_reg_rtx (Pmode
);
818 if (MACHO_DYNAMIC_NO_PIC_P
819 && (GET_CODE (XEXP (orig
, 0)) == SYMBOL_REF
820 || GET_CODE (XEXP (orig
, 0)) == LABEL_REF
))
822 #if defined (TARGET_TOC) /* ppc */
823 rtx temp_reg
= (!can_create_pseudo_p ()
825 gen_reg_rtx (Pmode
));
826 rtx asym
= XEXP (orig
, 0);
829 emit_insn (gen_macho_high (temp_reg
, asym
));
830 mem
= gen_const_mem (GET_MODE (orig
),
831 gen_rtx_LO_SUM (Pmode
, temp_reg
,
833 emit_insn (gen_rtx_SET (VOIDmode
, reg
, mem
));
835 /* Some other CPU -- WriteMe! but right now there are no other
836 platforms that can use dynamic-no-pic */
842 if (GET_CODE (XEXP (orig
, 0)) == SYMBOL_REF
843 || GET_CODE (XEXP (orig
, 0)) == LABEL_REF
)
845 rtx offset
= machopic_gen_offset (XEXP (orig
, 0));
846 #if defined (TARGET_TOC) /* i.e., PowerPC */
847 /* Generating a new reg may expose opportunities for
848 common subexpression elimination. */
849 rtx hi_sum_reg
= (!can_create_pseudo_p ()
851 : gen_reg_rtx (Pmode
));
856 sum
= gen_rtx_HIGH (Pmode
, offset
);
857 if (! MACHO_DYNAMIC_NO_PIC_P
)
858 sum
= gen_rtx_PLUS (Pmode
, pic_offset_table_rtx
, sum
);
860 emit_insn (gen_rtx_SET (Pmode
, hi_sum_reg
, sum
));
862 mem
= gen_const_mem (GET_MODE (orig
),
863 gen_rtx_LO_SUM (Pmode
,
866 insn
= emit_insn (gen_rtx_SET (VOIDmode
, reg
, mem
));
867 set_unique_reg_note (insn
, REG_EQUAL
, pic_ref
);
871 emit_use (gen_rtx_REG (Pmode
, PIC_OFFSET_TABLE_REGNUM
));
873 emit_insn (gen_rtx_SET (VOIDmode
, reg
,
875 gen_rtx_CONST (Pmode
,
877 emit_insn (gen_rtx_SET (VOIDmode
, reg
,
878 gen_rtx_LO_SUM (Pmode
, reg
,
879 gen_rtx_CONST (Pmode
,
880 copy_rtx (offset
)))));
881 pic_ref
= gen_rtx_PLUS (Pmode
,
882 pic_offset_table_rtx
, reg
);
886 #endif /* HAVE_lo_sum */
888 rtx pic
= pic_offset_table_rtx
;
889 if (GET_CODE (pic
) != REG
)
891 emit_move_insn (reg
, pic
);
895 emit_use (gen_rtx_REG (Pmode
, PIC_OFFSET_TABLE_REGNUM
));
898 if (reload_in_progress
)
899 df_set_regs_ever_live (REGNO (pic
), true);
900 pic_ref
= gen_rtx_PLUS (Pmode
, pic
,
901 machopic_gen_offset (XEXP (orig
, 0)));
904 #if !defined (TARGET_TOC)
905 emit_move_insn (reg
, pic_ref
);
906 pic_ref
= gen_const_mem (GET_MODE (orig
), reg
);
913 if (GET_CODE (orig
) == SYMBOL_REF
914 || GET_CODE (orig
) == LABEL_REF
)
916 rtx offset
= machopic_gen_offset (orig
);
917 #if defined (TARGET_TOC) /* i.e., PowerPC */
922 gcc_assert (!reload_in_progress
);
923 reg
= gen_reg_rtx (Pmode
);
928 emit_insn (gen_rtx_SET (Pmode
, hi_sum_reg
,
929 (MACHO_DYNAMIC_NO_PIC_P
)
930 ? gen_rtx_HIGH (Pmode
, offset
)
931 : gen_rtx_PLUS (Pmode
,
932 pic_offset_table_rtx
,
935 emit_insn (gen_rtx_SET (VOIDmode
, reg
,
936 gen_rtx_LO_SUM (Pmode
,
938 copy_rtx (offset
))));
941 emit_insn (gen_rtx_SET (VOIDmode
, reg
,
942 gen_rtx_HIGH (Pmode
, offset
)));
943 emit_insn (gen_rtx_SET (VOIDmode
, reg
,
944 gen_rtx_LO_SUM (Pmode
, reg
,
945 copy_rtx (offset
))));
946 pic_ref
= gen_rtx_PLUS (Pmode
,
947 pic_offset_table_rtx
, reg
);
951 #endif /* HAVE_lo_sum */
954 || GET_CODE (orig
) == SUBREG
)
960 rtx pic
= pic_offset_table_rtx
;
961 if (GET_CODE (pic
) != REG
)
963 emit_move_insn (reg
, pic
);
967 emit_use (pic_offset_table_rtx
);
969 if (reload_in_progress
)
970 df_set_regs_ever_live (REGNO (pic
), true);
971 pic_ref
= gen_rtx_PLUS (Pmode
,
973 machopic_gen_offset (orig
));
978 if (GET_CODE (pic_ref
) != REG
)
982 emit_move_insn (reg
, pic_ref
);
987 return force_reg (mode
, pic_ref
);
996 else if (GET_CODE (orig
) == SYMBOL_REF
)
999 else if (GET_CODE (orig
) == PLUS
1000 && (GET_CODE (XEXP (orig
, 0)) == MEM
1001 || GET_CODE (XEXP (orig
, 0)) == SYMBOL_REF
1002 || GET_CODE (XEXP (orig
, 0)) == LABEL_REF
)
1003 && XEXP (orig
, 0) != pic_offset_table_rtx
1004 && GET_CODE (XEXP (orig
, 1)) != REG
)
1008 int is_complex
= (GET_CODE (XEXP (orig
, 0)) == MEM
);
1010 base
= machopic_legitimize_pic_address (XEXP (orig
, 0), Pmode
, reg
);
1011 orig
= machopic_legitimize_pic_address (XEXP (orig
, 1),
1012 Pmode
, (base
== reg
? 0 : reg
));
1013 if (GET_CODE (orig
) == CONST_INT
)
1015 pic_ref
= plus_constant (Pmode
, base
, INTVAL (orig
));
1019 pic_ref
= gen_rtx_PLUS (Pmode
, base
, orig
);
1021 if (reg
&& is_complex
)
1023 emit_move_insn (reg
, pic_ref
);
1026 /* Likewise, should we set special REG_NOTEs here? */
1029 else if (GET_CODE (orig
) == CONST
)
1031 return machopic_legitimize_pic_address (XEXP (orig
, 0), Pmode
, reg
);
1034 else if (GET_CODE (orig
) == MEM
1035 && GET_CODE (XEXP (orig
, 0)) == SYMBOL_REF
)
1037 rtx addr
= machopic_legitimize_pic_address (XEXP (orig
, 0), Pmode
, reg
);
1038 addr
= replace_equiv_address (orig
, addr
);
1039 emit_move_insn (reg
, addr
);
1046 /* Output the stub or non-lazy pointer in *SLOT, if it has been used.
1047 DATA is the FILE* for assembly output. Called from
1051 machopic_output_indirection (void **slot
, void *data
)
1053 machopic_indirection
*p
= *((machopic_indirection
**) slot
);
1054 FILE *asm_out_file
= (FILE *) data
;
1056 const char *sym_name
;
1057 const char *ptr_name
;
1063 sym_name
= XSTR (symbol
, 0);
1064 ptr_name
= p
->ptr_name
;
1072 id
= maybe_get_identifier (sym_name
);
1077 while (IDENTIFIER_TRANSPARENT_ALIAS (id
))
1078 id
= TREE_CHAIN (id
);
1080 sym_name
= IDENTIFIER_POINTER (id
);
1083 sym
= XALLOCAVEC (char, strlen (sym_name
) + 2);
1084 if (sym_name
[0] == '*' || sym_name
[0] == '&')
1085 strcpy (sym
, sym_name
+ 1);
1086 else if (sym_name
[0] == '-' || sym_name
[0] == '+')
1087 strcpy (sym
, sym_name
);
1089 sprintf (sym
, "%s%s", user_label_prefix
, sym_name
);
1091 stub
= XALLOCAVEC (char, strlen (ptr_name
) + 2);
1092 if (ptr_name
[0] == '*' || ptr_name
[0] == '&')
1093 strcpy (stub
, ptr_name
+ 1);
1095 sprintf (stub
, "%s%s", user_label_prefix
, ptr_name
);
1097 machopic_output_stub (asm_out_file
, sym
, stub
);
1099 else if (! indirect_data (symbol
)
1100 && (machopic_symbol_defined_p (symbol
)
1101 || SYMBOL_REF_LOCAL_P (symbol
)))
1103 switch_to_section (data_section
);
1104 assemble_align (GET_MODE_ALIGNMENT (Pmode
));
1105 assemble_label (asm_out_file
, ptr_name
);
1106 assemble_integer (gen_rtx_SYMBOL_REF (Pmode
, sym_name
),
1107 GET_MODE_SIZE (Pmode
),
1108 GET_MODE_ALIGNMENT (Pmode
), 1);
1112 rtx init
= const0_rtx
;
1114 switch_to_section (darwin_sections
[machopic_nl_symbol_ptr_section
]);
1116 /* Mach-O symbols are passed around in code through indirect
1117 references and the original symbol_ref hasn't passed through
1118 the generic handling and reference-catching in
1119 output_operand, so we need to manually mark weak references
1121 if (SYMBOL_REF_WEAK (symbol
))
1123 tree decl
= SYMBOL_REF_DECL (symbol
);
1124 gcc_assert (DECL_P (decl
));
1126 if (decl
!= NULL_TREE
1127 && DECL_EXTERNAL (decl
) && TREE_PUBLIC (decl
)
1128 /* Handle only actual external-only definitions, not
1129 e.g. extern inline code or variables for which
1130 storage has been allocated. */
1131 && !TREE_STATIC (decl
))
1133 fputs ("\t.weak_reference ", asm_out_file
);
1134 assemble_name (asm_out_file
, sym_name
);
1135 fputc ('\n', asm_out_file
);
1139 assemble_name (asm_out_file
, ptr_name
);
1140 fprintf (asm_out_file
, ":\n");
1142 fprintf (asm_out_file
, "\t.indirect_symbol ");
1143 assemble_name (asm_out_file
, sym_name
);
1144 fprintf (asm_out_file
, "\n");
1146 /* Variables that are marked with MACHO_SYMBOL_STATIC need to
1147 have their symbol name instead of 0 in the second entry of
1148 the non-lazy symbol pointer data structure when they are
1149 defined. This allows the runtime to rebind newer instances
1150 of the translation unit with the original instance of the
1153 if ((SYMBOL_REF_FLAGS (symbol
) & MACHO_SYMBOL_STATIC
)
1154 && machopic_symbol_defined_p (symbol
))
1155 init
= gen_rtx_SYMBOL_REF (Pmode
, sym_name
);
1157 assemble_integer (init
, GET_MODE_SIZE (Pmode
),
1158 GET_MODE_ALIGNMENT (Pmode
), 1);
1165 machopic_finish (FILE *asm_out_file
)
1167 if (machopic_indirections
)
1168 htab_traverse_noresize (machopic_indirections
,
1169 machopic_output_indirection
,
1174 machopic_operand_p (rtx op
)
1176 if (MACHOPIC_JUST_INDIRECT
)
1177 return (GET_CODE (op
) == SYMBOL_REF
1178 && machopic_symbol_defined_p (op
));
1180 return (GET_CODE (op
) == CONST
1181 && GET_CODE (XEXP (op
, 0)) == UNSPEC
1182 && XINT (XEXP (op
, 0), 1) == UNSPEC_MACHOPIC_OFFSET
);
1185 /* This function records whether a given name corresponds to a defined
1186 or undefined function or variable, for machopic_classify_ident to
1190 darwin_encode_section_info (tree decl
, rtx rtl
, int first ATTRIBUTE_UNUSED
)
1194 /* Do the standard encoding things first. */
1195 default_encode_section_info (decl
, rtl
, first
);
1197 if (TREE_CODE (decl
) != FUNCTION_DECL
&& TREE_CODE (decl
) != VAR_DECL
)
1200 sym_ref
= XEXP (rtl
, 0);
1201 if (TREE_CODE (decl
) == VAR_DECL
)
1202 SYMBOL_REF_FLAGS (sym_ref
) |= MACHO_SYMBOL_FLAG_VARIABLE
;
1204 if (!DECL_EXTERNAL (decl
)
1205 && (!TREE_PUBLIC (decl
) || !DECL_WEAK (decl
))
1206 && ! lookup_attribute ("weakref", DECL_ATTRIBUTES (decl
))
1207 && ((TREE_STATIC (decl
)
1208 && (!DECL_COMMON (decl
) || !TREE_PUBLIC (decl
)))
1209 || (!DECL_COMMON (decl
) && DECL_INITIAL (decl
)
1210 && DECL_INITIAL (decl
) != error_mark_node
)))
1211 SYMBOL_REF_FLAGS (sym_ref
) |= MACHO_SYMBOL_FLAG_DEFINED
;
1213 if (! TREE_PUBLIC (decl
))
1214 SYMBOL_REF_FLAGS (sym_ref
) |= MACHO_SYMBOL_STATIC
;
1218 darwin_mark_decl_preserved (const char *name
)
1220 fprintf (asm_out_file
, "\t.no_dead_strip ");
1221 assemble_name (asm_out_file
, name
);
1222 fputc ('\n', asm_out_file
);
1226 darwin_rodata_section (int weak
, bool zsize
)
1229 ? darwin_sections
[const_coal_section
]
1230 : (zsize
? darwin_sections
[zobj_const_section
]
1231 : darwin_sections
[const_section
]));
1235 darwin_mergeable_string_section (tree exp
,
1236 unsigned HOST_WIDE_INT align
)
1238 /* Darwin's ld expects to see non-writable string literals in the .cstring
1239 section. Later versions of ld check and complain when CFStrings are
1240 enabled. Therefore we shall force the strings into .cstring since we
1241 don't support writable ones anyway. */
1242 if ((darwin_constant_cfstrings
|| flag_merge_constants
)
1243 && TREE_CODE (exp
) == STRING_CST
1244 && TREE_CODE (TREE_TYPE (exp
)) == ARRAY_TYPE
1246 && (int_size_in_bytes (TREE_TYPE (exp
))
1247 == TREE_STRING_LENGTH (exp
))
1248 && ((size_t) TREE_STRING_LENGTH (exp
)
1249 == strlen (TREE_STRING_POINTER (exp
)) + 1))
1250 return darwin_sections
[cstring_section
];
1252 if (DARWIN_SECTION_ANCHORS
&& flag_section_anchors
1253 && TREE_CODE (exp
) == STRING_CST
1254 && TREE_STRING_LENGTH (exp
) == 0)
1255 return darwin_sections
[zobj_const_section
];
1257 return readonly_data_section
;
1260 #ifndef HAVE_GAS_LITERAL16
1261 #define HAVE_GAS_LITERAL16 0
1265 darwin_mergeable_constant_section (tree exp
,
1266 unsigned HOST_WIDE_INT align
,
1269 enum machine_mode mode
= DECL_MODE (exp
);
1270 unsigned int modesize
= GET_MODE_BITSIZE (mode
);
1272 if (DARWIN_SECTION_ANCHORS
1273 && flag_section_anchors
1275 return darwin_sections
[zobj_const_section
];
1277 if (flag_merge_constants
1280 && modesize
<= align
1283 && (align
& (align
-1)) == 0)
1285 tree size
= TYPE_SIZE_UNIT (TREE_TYPE (exp
));
1287 if (TREE_CODE (size
) == INTEGER_CST
)
1289 wide_int wsize
= size
;
1291 return darwin_sections
[literal4_section
];
1292 else if (wsize
== 8)
1293 return darwin_sections
[literal8_section
];
1294 else if (HAVE_GAS_LITERAL16
1297 return darwin_sections
[literal16_section
];
1301 return readonly_data_section
;
1305 darwin_tm_clone_table_section (void)
1307 return get_named_section (NULL
,
1308 "__DATA,__tm_clone_table,regular,no_dead_strip",
1313 machopic_reloc_rw_mask (void)
1315 return MACHOPIC_INDIRECT
? 3 : 0;
1318 /* We have to deal with ObjC/C++ metadata section placement in the common
1319 code, since it will also be called from LTO.
1321 Return metadata attributes, if present (searching for ABI=2 first)
1322 Return NULL_TREE if no such attributes are found. */
1325 is_objc_metadata (tree decl
)
1328 && (TREE_CODE (decl
) == VAR_DECL
|| TREE_CODE (decl
) == CONST_DECL
)
1329 && DECL_ATTRIBUTES (decl
))
1331 tree meta
= lookup_attribute ("OBJC2META", DECL_ATTRIBUTES (decl
));
1334 meta
= lookup_attribute ("OBJC1META", DECL_ATTRIBUTES (decl
));
1341 static int classes_seen
;
1342 static int objc_metadata_seen
;
1344 /* Return the section required for Objective C ABI 2 metadata. */
1346 darwin_objc2_section (tree decl ATTRIBUTE_UNUSED
, tree meta
, section
* base
)
1349 tree ident
= TREE_VALUE (meta
);
1350 gcc_assert (TREE_CODE (ident
) == IDENTIFIER_NODE
);
1351 p
= IDENTIFIER_POINTER (ident
);
1353 gcc_checking_assert (flag_next_runtime
== 1 && flag_objc_abi
== 2);
1355 objc_metadata_seen
= 1;
1357 if (base
== data_section
)
1358 base
= darwin_sections
[objc2_metadata_section
];
1360 /* Most of the OBJC2 META-data end up in the base section, so check it
1362 if (!strncmp (p
, "V2_BASE", 7))
1364 else if (!strncmp (p
, "V2_STRG", 7))
1365 return darwin_sections
[cstring_section
];
1367 else if (!strncmp (p
, "G2_META", 7) || !strncmp (p
, "G2_CLAS", 7))
1368 return darwin_sections
[objc2_classdefs_section
];
1369 else if (!strncmp (p
, "V2_MREF", 7))
1370 return darwin_sections
[objc2_message_refs_section
];
1371 else if (!strncmp (p
, "V2_CLRF", 7))
1372 return darwin_sections
[objc2_classrefs_section
];
1373 else if (!strncmp (p
, "V2_SURF", 7))
1374 return darwin_sections
[objc2_super_classrefs_section
];
1375 else if (!strncmp (p
, "V2_NLCL", 7))
1376 return darwin_sections
[objc2_nonlazy_class_section
];
1377 else if (!strncmp (p
, "V2_CLAB", 7))
1380 return darwin_sections
[objc2_classlist_section
];
1382 else if (!strncmp (p
, "V2_SRFS", 7))
1383 return darwin_sections
[objc2_selector_refs_section
];
1384 else if (!strncmp (p
, "V2_NLCA", 7))
1385 return darwin_sections
[objc2_nonlazy_category_section
];
1386 else if (!strncmp (p
, "V2_CALA", 7))
1387 return darwin_sections
[objc2_categorylist_section
];
1389 else if (!strncmp (p
, "V2_PLST", 7))
1390 return darwin_sections
[objc2_protocollist_section
];
1391 else if (!strncmp (p
, "V2_PRFS", 7))
1392 return darwin_sections
[objc2_protocolrefs_section
];
1394 else if (!strncmp (p
, "V2_INFO", 7))
1395 return darwin_sections
[objc2_image_info_section
];
1397 else if (!strncmp (p
, "V2_EHTY", 7))
1398 return darwin_sections
[data_coal_section
];
1400 else if (!strncmp (p
, "V2_CSTR", 7))
1401 return darwin_sections
[objc2_constant_string_object_section
];
1403 /* Not recognized, default. */
1407 /* Return the section required for Objective C ABI 0/1 metadata. */
1409 darwin_objc1_section (tree decl ATTRIBUTE_UNUSED
, tree meta
, section
* base
)
1412 tree ident
= TREE_VALUE (meta
);
1413 gcc_assert (TREE_CODE (ident
) == IDENTIFIER_NODE
);
1414 p
= IDENTIFIER_POINTER (ident
);
1416 gcc_checking_assert (flag_next_runtime
== 1 && flag_objc_abi
< 2);
1418 objc_metadata_seen
= 1;
1420 /* String sections first, cos there are lots of strings. */
1421 if (!strncmp (p
, "V1_STRG", 7))
1422 return darwin_sections
[cstring_section
];
1423 else if (!strncmp (p
, "V1_CLSN", 7))
1424 return darwin_sections
[objc_class_names_section
];
1425 else if (!strncmp (p
, "V1_METN", 7))
1426 return darwin_sections
[objc_meth_var_names_section
];
1427 else if (!strncmp (p
, "V1_METT", 7))
1428 return darwin_sections
[objc_meth_var_types_section
];
1430 else if (!strncmp (p
, "V1_CLAS", 7))
1433 return darwin_sections
[objc_class_section
];
1435 else if (!strncmp (p
, "V1_META", 7))
1436 return darwin_sections
[objc_meta_class_section
];
1437 else if (!strncmp (p
, "V1_CATG", 7))
1438 return darwin_sections
[objc_category_section
];
1439 else if (!strncmp (p
, "V1_PROT", 7))
1440 return darwin_sections
[objc_protocol_section
];
1442 else if (!strncmp (p
, "V1_CLCV", 7))
1443 return darwin_sections
[objc_class_vars_section
];
1444 else if (!strncmp (p
, "V1_CLIV", 7))
1445 return darwin_sections
[objc_instance_vars_section
];
1447 else if (!strncmp (p
, "V1_CLCM", 7))
1448 return darwin_sections
[objc_cls_meth_section
];
1449 else if (!strncmp (p
, "V1_CLIM", 7))
1450 return darwin_sections
[objc_inst_meth_section
];
1451 else if (!strncmp (p
, "V1_CACM", 7))
1452 return darwin_sections
[objc_cat_cls_meth_section
];
1453 else if (!strncmp (p
, "V1_CAIM", 7))
1454 return darwin_sections
[objc_cat_inst_meth_section
];
1455 else if (!strncmp (p
, "V1_PNSM", 7))
1456 return darwin_sections
[objc_cat_inst_meth_section
];
1457 else if (!strncmp (p
, "V1_PCLM", 7))
1458 return darwin_sections
[objc_cat_cls_meth_section
];
1460 else if (!strncmp (p
, "V1_CLPR", 7))
1461 return darwin_sections
[objc_cat_cls_meth_section
];
1462 else if (!strncmp (p
, "V1_CAPR", 7))
1463 return darwin_sections
[objc_category_section
]; /* ??? CHECK me. */
1465 else if (!strncmp (p
, "V1_PRFS", 7))
1466 return darwin_sections
[objc_cat_cls_meth_section
];
1467 else if (!strncmp (p
, "V1_CLRF", 7))
1468 return darwin_sections
[objc_cls_refs_section
];
1469 else if (!strncmp (p
, "V1_SRFS", 7))
1470 return darwin_sections
[objc_selector_refs_section
];
1472 else if (!strncmp (p
, "V1_MODU", 7))
1473 return darwin_sections
[objc_module_info_section
];
1474 else if (!strncmp (p
, "V1_SYMT", 7))
1475 return darwin_sections
[objc_symbols_section
];
1476 else if (!strncmp (p
, "V1_INFO", 7))
1477 return darwin_sections
[objc_image_info_section
];
1479 else if (!strncmp (p
, "V1_PLST", 7))
1480 return darwin_sections
[objc1_prop_list_section
];
1481 else if (!strncmp (p
, "V1_PEXT", 7))
1482 return darwin_sections
[objc1_protocol_ext_section
];
1483 else if (!strncmp (p
, "V1_CEXT", 7))
1484 return darwin_sections
[objc1_class_ext_section
];
1486 else if (!strncmp (p
, "V2_CSTR", 7))
1487 return darwin_sections
[objc_constant_string_object_section
];
1493 machopic_select_section (tree decl
,
1495 unsigned HOST_WIDE_INT align
)
1497 bool zsize
, one
, weak
, ro
;
1498 section
*base_section
= NULL
;
1500 weak
= (DECL_P (decl
)
1502 && !lookup_attribute ("weak_import", DECL_ATTRIBUTES (decl
)));
1504 zsize
= (DECL_P (decl
)
1505 && (TREE_CODE (decl
) == VAR_DECL
|| TREE_CODE (decl
) == CONST_DECL
)
1506 && tree_to_uhwi (DECL_SIZE_UNIT (decl
)) == 0);
1509 && TREE_CODE (decl
) == VAR_DECL
1510 && DECL_ONE_ONLY (decl
);
1512 ro
= TREE_READONLY (decl
) || TREE_CONSTANT (decl
) ;
1514 switch (categorize_decl_for_section (decl
, reloc
))
1521 case SECCAT_SRODATA
:
1522 base_section
= darwin_rodata_section (weak
, zsize
);
1525 case SECCAT_RODATA_MERGE_STR
:
1526 base_section
= darwin_mergeable_string_section (decl
, align
);
1529 case SECCAT_RODATA_MERGE_STR_INIT
:
1530 base_section
= darwin_mergeable_string_section (DECL_INITIAL (decl
), align
);
1533 case SECCAT_RODATA_MERGE_CONST
:
1534 base_section
= darwin_mergeable_constant_section (decl
, align
, zsize
);
1538 case SECCAT_DATA_REL
:
1539 case SECCAT_DATA_REL_LOCAL
:
1540 case SECCAT_DATA_REL_RO
:
1541 case SECCAT_DATA_REL_RO_LOCAL
:
1547 base_section
= darwin_sections
[const_data_coal_section
];
1549 base_section
= darwin_sections
[data_coal_section
];
1551 else if (DARWIN_SECTION_ANCHORS
1552 && flag_section_anchors
1555 /* If we're doing section anchors, then punt zero-sized objects into
1556 their own sections so that they don't interfere with offset
1557 computation for the remaining vars. This does not need to be done
1558 for stuff in mergeable sections, since these are ineligible for
1561 base_section
= darwin_sections
[zobj_const_data_section
];
1563 base_section
= darwin_sections
[zobj_data_section
];
1566 base_section
= darwin_sections
[const_data_section
];
1568 base_section
= data_section
;
1574 base_section
= darwin_sections
[data_coal_section
];
1577 if (!TREE_PUBLIC (decl
))
1578 base_section
= lcomm_section
;
1579 else if (bss_noswitch_section
)
1580 base_section
= bss_noswitch_section
;
1582 base_section
= data_section
;
1590 /* Darwin weird special cases.
1591 a) OBJC Meta-data. */
1593 && (TREE_CODE (decl
) == VAR_DECL
1594 || TREE_CODE (decl
) == CONST_DECL
)
1595 && DECL_ATTRIBUTES (decl
))
1597 tree meta
= lookup_attribute ("OBJC2META", DECL_ATTRIBUTES (decl
));
1599 return darwin_objc2_section (decl
, meta
, base_section
);
1600 meta
= lookup_attribute ("OBJC1META", DECL_ATTRIBUTES (decl
));
1602 return darwin_objc1_section (decl
, meta
, base_section
);
1603 meta
= lookup_attribute ("OBJC1METG", DECL_ATTRIBUTES (decl
));
1605 return base_section
; /* GNU runtime is happy with it all in one pot. */
1608 /* b) Constant string objects. */
1609 if (TREE_CODE (decl
) == CONSTRUCTOR
1611 && TREE_CODE (TREE_TYPE (decl
)) == RECORD_TYPE
1612 && TYPE_NAME (TREE_TYPE (decl
)))
1614 tree name
= TYPE_NAME (TREE_TYPE (decl
));
1615 if (TREE_CODE (name
) == TYPE_DECL
)
1616 name
= DECL_NAME (name
);
1618 if (!strcmp (IDENTIFIER_POINTER (name
), "__builtin_ObjCString"))
1620 if (flag_next_runtime
)
1622 if (flag_objc_abi
== 2)
1623 return darwin_sections
[objc2_constant_string_object_section
];
1625 return darwin_sections
[objc_constant_string_object_section
];
1628 return darwin_sections
[objc_string_object_section
];
1630 else if (!strcmp (IDENTIFIER_POINTER (name
), "__builtin_CFString"))
1631 return darwin_sections
[cfstring_constant_object_section
];
1633 return base_section
;
1635 /* c) legacy meta-data selection. */
1636 else if (TREE_CODE (decl
) == VAR_DECL
1638 && TREE_CODE (DECL_NAME (decl
)) == IDENTIFIER_NODE
1639 && IDENTIFIER_POINTER (DECL_NAME (decl
))
1640 && flag_next_runtime
1641 && !strncmp (IDENTIFIER_POINTER (DECL_NAME (decl
)), "_OBJC_", 6))
1643 const char *name
= IDENTIFIER_POINTER (DECL_NAME (decl
));
1644 static bool warned_objc_46
= false;
1645 /* We shall assert that zero-sized objects are an error in ObjC
1647 gcc_assert (tree_to_uhwi (DECL_SIZE_UNIT (decl
)) != 0);
1649 /* ??? This mechanism for determining the metadata section is
1650 broken when LTO is in use, since the frontend that generated
1651 the data is not identified. We will keep the capability for
1652 the short term - in case any non-Objective-C programs are using
1653 it to place data in specified sections. */
1654 if (!warned_objc_46
)
1656 location_t loc
= DECL_SOURCE_LOCATION (decl
);
1657 warning_at (loc
, 0, "the use of _OBJC_-prefixed variable names"
1658 " to select meta-data sections is deprecated at 4.6"
1659 " and will be removed in 4.7");
1660 warned_objc_46
= true;
1663 if (!strncmp (name
, "_OBJC_CLASS_METHODS_", 20))
1664 return darwin_sections
[objc_cls_meth_section
];
1665 else if (!strncmp (name
, "_OBJC_INSTANCE_METHODS_", 23))
1666 return darwin_sections
[objc_inst_meth_section
];
1667 else if (!strncmp (name
, "_OBJC_CATEGORY_CLASS_METHODS_", 29))
1668 return darwin_sections
[objc_cat_cls_meth_section
];
1669 else if (!strncmp (name
, "_OBJC_CATEGORY_INSTANCE_METHODS_", 32))
1670 return darwin_sections
[objc_cat_inst_meth_section
];
1671 else if (!strncmp (name
, "_OBJC_CLASS_VARIABLES_", 22))
1672 return darwin_sections
[objc_class_vars_section
];
1673 else if (!strncmp (name
, "_OBJC_INSTANCE_VARIABLES_", 25))
1674 return darwin_sections
[objc_instance_vars_section
];
1675 else if (!strncmp (name
, "_OBJC_CLASS_PROTOCOLS_", 22))
1676 return darwin_sections
[objc_cat_cls_meth_section
];
1677 else if (!strncmp (name
, "_OBJC_CLASS_NAME_", 17))
1678 return darwin_sections
[objc_class_names_section
];
1679 else if (!strncmp (name
, "_OBJC_METH_VAR_NAME_", 20))
1680 return darwin_sections
[objc_meth_var_names_section
];
1681 else if (!strncmp (name
, "_OBJC_METH_VAR_TYPE_", 20))
1682 return darwin_sections
[objc_meth_var_types_section
];
1683 else if (!strncmp (name
, "_OBJC_CLASS_REFERENCES", 22))
1684 return darwin_sections
[objc_cls_refs_section
];
1685 else if (!strncmp (name
, "_OBJC_CLASS_", 12))
1686 return darwin_sections
[objc_class_section
];
1687 else if (!strncmp (name
, "_OBJC_METACLASS_", 16))
1688 return darwin_sections
[objc_meta_class_section
];
1689 else if (!strncmp (name
, "_OBJC_CATEGORY_", 15))
1690 return darwin_sections
[objc_category_section
];
1691 else if (!strncmp (name
, "_OBJC_SELECTOR_REFERENCES", 25))
1692 return darwin_sections
[objc_selector_refs_section
];
1693 else if (!strncmp (name
, "_OBJC_SELECTOR_FIXUP", 20))
1694 return darwin_sections
[objc_selector_fixup_section
];
1695 else if (!strncmp (name
, "_OBJC_SYMBOLS", 13))
1696 return darwin_sections
[objc_symbols_section
];
1697 else if (!strncmp (name
, "_OBJC_MODULES", 13))
1698 return darwin_sections
[objc_module_info_section
];
1699 else if (!strncmp (name
, "_OBJC_IMAGE_INFO", 16))
1700 return darwin_sections
[objc_image_info_section
];
1701 else if (!strncmp (name
, "_OBJC_PROTOCOL_INSTANCE_METHODS_", 32))
1702 return darwin_sections
[objc_cat_inst_meth_section
];
1703 else if (!strncmp (name
, "_OBJC_PROTOCOL_CLASS_METHODS_", 29))
1704 return darwin_sections
[objc_cat_cls_meth_section
];
1705 else if (!strncmp (name
, "_OBJC_PROTOCOL_REFS_", 20))
1706 return darwin_sections
[objc_cat_cls_meth_section
];
1707 else if (!strncmp (name
, "_OBJC_PROTOCOL_", 15))
1708 return darwin_sections
[objc_protocol_section
];
1710 return base_section
;
1713 return base_section
;
1716 /* This can be called with address expressions as "rtx".
1717 They must go in "const". */
1720 machopic_select_rtx_section (enum machine_mode mode
, rtx x
,
1721 unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED
)
1723 if (GET_MODE_SIZE (mode
) == 8
1724 && (GET_CODE (x
) == CONST_INT
1725 || GET_CODE (x
) == CONST_WIDE_INT
1726 || GET_CODE (x
) == CONST_DOUBLE
))
1727 return darwin_sections
[literal8_section
];
1728 else if (GET_MODE_SIZE (mode
) == 4
1729 && (GET_CODE (x
) == CONST_INT
1730 || GET_CODE (x
) == CONST_WIDE_INT
1731 || GET_CODE (x
) == CONST_DOUBLE
))
1732 return darwin_sections
[literal4_section
];
1733 else if (HAVE_GAS_LITERAL16
1735 && GET_MODE_SIZE (mode
) == 16
1736 && (GET_CODE (x
) == CONST_INT
1737 || GET_CODE (x
) == CONST_WIDE_INT
1738 || GET_CODE (x
) == CONST_DOUBLE
1739 || GET_CODE (x
) == CONST_VECTOR
))
1740 return darwin_sections
[literal16_section
];
1741 else if (MACHOPIC_INDIRECT
1742 && (GET_CODE (x
) == SYMBOL_REF
1743 || GET_CODE (x
) == CONST
1744 || GET_CODE (x
) == LABEL_REF
))
1745 return darwin_sections
[const_data_section
];
1747 return darwin_sections
[const_section
];
1751 machopic_asm_out_constructor (rtx symbol
, int priority ATTRIBUTE_UNUSED
)
1753 cdtor_record new_elt
= {symbol
, priority
, vec_safe_length (ctors
)};
1755 vec_safe_push (ctors
, new_elt
);
1757 if (! MACHOPIC_INDIRECT
)
1758 fprintf (asm_out_file
, ".reference .constructors_used\n");
1762 machopic_asm_out_destructor (rtx symbol
, int priority ATTRIBUTE_UNUSED
)
1764 cdtor_record new_elt
= {symbol
, priority
, vec_safe_length (dtors
)};
1766 vec_safe_push (dtors
, new_elt
);
1768 if (! MACHOPIC_INDIRECT
)
1769 fprintf (asm_out_file
, ".reference .destructors_used\n");
1773 sort_cdtor_records (const void * a
, const void * b
)
1775 const cdtor_record
*cda
= (const cdtor_record
*)a
;
1776 const cdtor_record
*cdb
= (const cdtor_record
*)b
;
1777 if (cda
->priority
> cdb
->priority
)
1779 if (cda
->priority
< cdb
->priority
)
1781 if (cda
->position
> cdb
->position
)
1783 if (cda
->position
< cdb
->position
)
1794 if (MACHOPIC_INDIRECT
)
1795 switch_to_section (darwin_sections
[mod_init_section
]);
1797 switch_to_section (darwin_sections
[constructor_section
]);
1799 if (vec_safe_length (ctors
) > 1)
1800 ctors
->qsort (sort_cdtor_records
);
1801 FOR_EACH_VEC_SAFE_ELT (ctors
, i
, elt
)
1803 assemble_align (POINTER_SIZE
);
1804 assemble_integer (elt
->symbol
, POINTER_SIZE
/ BITS_PER_UNIT
, POINTER_SIZE
, 1);
1814 if (MACHOPIC_INDIRECT
)
1815 switch_to_section (darwin_sections
[mod_term_section
]);
1817 switch_to_section (darwin_sections
[destructor_section
]);
1819 if (vec_safe_length (dtors
) > 1)
1820 dtors
->qsort (sort_cdtor_records
);
1821 FOR_EACH_VEC_SAFE_ELT (dtors
, i
, elt
)
1823 assemble_align (POINTER_SIZE
);
1824 assemble_integer (elt
->symbol
, POINTER_SIZE
/ BITS_PER_UNIT
, POINTER_SIZE
, 1);
1829 darwin_globalize_label (FILE *stream
, const char *name
)
1831 if (!!strncmp (name
, "_OBJC_", 6))
1832 default_globalize_label (stream
, name
);
1835 /* This routine returns non-zero if 'name' starts with the special objective-c
1836 anonymous file-scope static name. It accommodates c++'s mangling of such
1837 symbols (in this case the symbols will have form _ZL{d}*_OBJC_* d=digit). */
1840 darwin_label_is_anonymous_local_objc_name (const char *name
)
1842 const unsigned char *p
= (const unsigned char *) name
;
1845 if (p
[1] == 'Z' && p
[2] == 'L')
1848 while (*p
>= '0' && *p
<= '9')
1851 return (!strncmp ((const char *)p
, "_OBJC_", 6));
1854 /* LTO support for Mach-O.
1856 This version uses three mach-o sections to encapsulate the (unlimited
1857 number of) lto sections.
1859 __GNU_LTO, __lto_sections contains the concatented GNU LTO section data.
1860 __GNU_LTO, __section_names contains the GNU LTO section names.
1861 __GNU_LTO, __section_index contains an array of values that index these.
1864 <section offset from the start of __GNU_LTO, __lto_sections>,
1866 <name offset from the start of __GNU_LTO, __section_names,
1869 At present, for both m32 and m64 mach-o files each of these fields is
1870 represented by a uint32_t. This is because, AFAICT, a mach-o object
1871 cannot exceed 4Gb because the section_64 offset field (see below) is 32bits.
1874 "offset An integer specifying the offset to this section in the file." */
1876 /* Count lto section numbers. */
1877 static unsigned int lto_section_num
= 0;
1879 /* A vector of information about LTO sections, at present, we only have
1880 the name. TODO: see if we can get the data length somehow. */
1881 typedef struct GTY (()) darwin_lto_section_e
{
1882 const char *sectname
;
1883 } darwin_lto_section_e
;
1885 static GTY (()) vec
<darwin_lto_section_e
, va_gc
> *lto_section_names
;
1887 /* Segment for LTO data. */
1888 #define LTO_SEGMENT_NAME "__GNU_LTO"
1890 /* Section wrapper scheme (used here to wrap the unlimited number of LTO
1891 sections into three Mach-O ones).
1892 NOTE: These names MUST be kept in sync with those in
1893 libiberty/simple-object-mach-o. */
1894 #define LTO_SECTS_SECTION "__wrapper_sects"
1895 #define LTO_NAMES_SECTION "__wrapper_names"
1896 #define LTO_INDEX_SECTION "__wrapper_index"
1898 /* File to temporarily store LTO data. This is appended to asm_out_file
1899 in darwin_end_file. */
1900 static FILE *lto_asm_out_file
, *saved_asm_out_file
;
1901 static char *lto_asm_out_name
;
1903 /* Prepare asm_out_file for LTO output. For darwin, this means hiding
1904 asm_out_file and switching to an alternative output file. */
1906 darwin_asm_lto_start (void)
1908 gcc_assert (! saved_asm_out_file
);
1909 saved_asm_out_file
= asm_out_file
;
1910 if (! lto_asm_out_name
)
1911 lto_asm_out_name
= make_temp_file (".lto.s");
1912 lto_asm_out_file
= fopen (lto_asm_out_name
, "a");
1913 if (lto_asm_out_file
== NULL
)
1914 fatal_error ("failed to open temporary file %s for LTO output",
1916 asm_out_file
= lto_asm_out_file
;
1919 /* Restore asm_out_file. */
1921 darwin_asm_lto_end (void)
1923 gcc_assert (saved_asm_out_file
);
1924 fclose (lto_asm_out_file
);
1925 asm_out_file
= saved_asm_out_file
;
1926 saved_asm_out_file
= NULL
;
1930 darwin_asm_dwarf_section (const char *name
, unsigned int flags
, tree decl
);
1932 /* Called for the TARGET_ASM_NAMED_SECTION hook. */
1935 darwin_asm_named_section (const char *name
,
1937 tree decl ATTRIBUTE_UNUSED
)
1939 /* LTO sections go in a special section that encapsulates the (unlimited)
1940 number of GNU LTO sections within a single mach-o one. */
1941 if (strncmp (name
, LTO_SECTION_NAME_PREFIX
,
1942 strlen (LTO_SECTION_NAME_PREFIX
)) == 0)
1944 darwin_lto_section_e e
;
1945 /* We expect certain flags to be set... */
1946 gcc_assert ((flags
& (SECTION_DEBUG
| SECTION_NAMED
))
1947 == (SECTION_DEBUG
| SECTION_NAMED
));
1949 /* Switch to our combined section. */
1950 fprintf (asm_out_file
, "\t.section %s,%s,regular,debug\n",
1951 LTO_SEGMENT_NAME
, LTO_SECTS_SECTION
);
1952 /* Output a label for the start of this sub-section. */
1953 fprintf (asm_out_file
, "L_GNU_LTO%d:\t;# %s\n",
1954 lto_section_num
, name
);
1955 /* We have to jump through hoops to get the values of the intra-section
1957 fprintf (asm_out_file
, "\t.set L$gnu$lto$offs%d,L_GNU_LTO%d-L_GNU_LTO0\n",
1958 lto_section_num
, lto_section_num
);
1959 fprintf (asm_out_file
,
1960 "\t.set L$gnu$lto$size%d,L_GNU_LTO%d-L_GNU_LTO%d\n",
1961 lto_section_num
, lto_section_num
+1, lto_section_num
);
1963 e
.sectname
= xstrdup (name
);
1964 /* Keep the names, we'll need to make a table later.
1965 TODO: check that we do not revisit sections, that would break
1966 the assumption of how this is done. */
1967 if (lto_section_names
== NULL
)
1968 vec_alloc (lto_section_names
, 16);
1969 vec_safe_push (lto_section_names
, e
);
1971 else if (strncmp (name
, "__DWARF,", 8) == 0)
1972 darwin_asm_dwarf_section (name
, flags
, decl
);
1974 fprintf (asm_out_file
, "\t.section %s\n", name
);
1978 darwin_unique_section (tree decl ATTRIBUTE_UNUSED
, int reloc ATTRIBUTE_UNUSED
)
1980 /* Darwin does not use unique sections. */
1983 /* Handle __attribute__ ((apple_kext_compatibility)).
1984 This only applies to darwin kexts for 2.95 compatibility -- it shrinks the
1985 vtable for classes with this attribute (and their descendants) by not
1986 outputting the new 3.0 nondeleting destructor. This means that such
1987 objects CANNOT be allocated on the stack or as globals UNLESS they have
1988 a completely empty `operator delete'.
1989 Luckily, this fits in with the Darwin kext model.
1991 This attribute also disables gcc3's potential overlaying of derived
1992 class data members on the padding at the end of the base class. */
1995 darwin_handle_kext_attribute (tree
*node
, tree name
,
1996 tree args ATTRIBUTE_UNUSED
,
1997 int flags ATTRIBUTE_UNUSED
,
2000 /* APPLE KEXT stuff -- only applies with pure static C++ code. */
2001 if (! TARGET_KEXTABI
)
2003 warning (0, "%qE 2.95 vtable-compatibility attribute applies "
2004 "only when compiling a kext", name
);
2006 *no_add_attrs
= true;
2008 else if (TREE_CODE (*node
) != RECORD_TYPE
)
2010 warning (0, "%qE 2.95 vtable-compatibility attribute applies "
2011 "only to C++ classes", name
);
2013 *no_add_attrs
= true;
2019 /* Handle a "weak_import" attribute; arguments as in
2020 struct attribute_spec.handler. */
2023 darwin_handle_weak_import_attribute (tree
*node
, tree name
,
2024 tree
ARG_UNUSED (args
),
2025 int ARG_UNUSED (flags
),
2026 bool * no_add_attrs
)
2028 if (TREE_CODE (*node
) != FUNCTION_DECL
&& TREE_CODE (*node
) != VAR_DECL
)
2030 warning (OPT_Wattributes
, "%qE attribute ignored",
2032 *no_add_attrs
= true;
2035 declare_weak (*node
);
2040 /* Emit a label for an FDE, making it global and/or weak if appropriate.
2041 The third parameter is nonzero if this is for exception handling.
2042 The fourth parameter is nonzero if this is just a placeholder for an
2043 FDE that we are omitting. */
2046 darwin_emit_unwind_label (FILE *file
, tree decl
, int for_eh
, int empty
)
2050 static int invok_count
= 0;
2051 static tree last_fun_decl
= NULL_TREE
;
2053 /* We use the linker to emit the .eh labels for Darwin 9 and above. */
2054 if (! for_eh
|| generating_for_darwin_version
>= 9)
2057 /* FIXME: This only works when the eh for all sections of a function is
2058 emitted at the same time. If that changes, we would need to use a lookup
2059 table of some form to determine what to do. Also, we should emit the
2060 unadorned label for the partition containing the public label for a
2061 function. This is of limited use, probably, since we do not currently
2062 enable partitioning. */
2063 strcpy (buf
, ".eh");
2064 if (decl
&& TREE_CODE (decl
) == FUNCTION_DECL
)
2066 if (decl
== last_fun_decl
)
2069 snprintf (buf
, 31, "$$part$$%d.eh", invok_count
);
2073 last_fun_decl
= decl
;
2078 lab
= concat (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
)), buf
, NULL
);
2080 if (TREE_PUBLIC (decl
))
2082 targetm
.asm_out
.globalize_label (file
, lab
);
2083 if (DECL_VISIBILITY (decl
) == VISIBILITY_HIDDEN
)
2085 fputs ("\t.private_extern ", file
);
2086 assemble_name (file
, lab
);
2091 if (DECL_WEAK (decl
))
2093 fputs ("\t.weak_definition ", file
);
2094 assemble_name (file
, lab
);
2098 assemble_name (file
, lab
);
2101 fputs (" = 0\n", file
);
2103 /* Mark the absolute .eh and .eh1 style labels as needed to
2104 ensure that we don't dead code strip them and keep such
2105 labels from another instantiation point until we can fix this
2106 properly with group comdat support. */
2107 darwin_mark_decl_preserved (lab
);
2110 fputs (":\n", file
);
2115 static GTY(()) unsigned long except_table_label_num
;
2118 darwin_emit_except_table_label (FILE *file
)
2120 char section_start_label
[30];
2122 ASM_GENERATE_INTERNAL_LABEL (section_start_label
, "GCC_except_table",
2123 except_table_label_num
++);
2124 ASM_OUTPUT_LABEL (file
, section_start_label
);
2126 /* Generate a PC-relative reference to a Mach-O non-lazy-symbol. */
2129 darwin_non_lazy_pcrel (FILE *file
, rtx addr
)
2131 const char *nlp_name
;
2133 gcc_assert (GET_CODE (addr
) == SYMBOL_REF
);
2135 nlp_name
= machopic_indirection_name (addr
, /*stub_p=*/false);
2136 fputs ("\t.long\t", file
);
2137 ASM_OUTPUT_LABELREF (file
, nlp_name
);
2141 /* If this is uncommented, details of each allocation will be printed
2142 in the asm right before the actual code. WARNING - this will cause some
2143 test-suite fails (since the printout will contain items that some tests
2144 are not expecting) -- so don't leave it on by default (it bloats the
2146 /*#define DEBUG_DARWIN_MEM_ALLOCATORS*/
2148 /* The first two of these routines are ostensibly just intended to put
2149 names into the asm. However, they are both hijacked in order to ensure
2150 that zero-sized items do not make their way into the output. Consequently,
2151 we also need to make these participate in provisions for dealing with
2152 such items in section anchors. */
2154 /* The implementation of ASM_DECLARE_OBJECT_NAME. */
2155 /* The RTTI data (e.g., __ti4name) is common and public (and static),
2156 but it does need to be referenced via indirect PIC data pointers.
2157 The machopic_define_symbol calls are telling the machopic subsystem
2158 that the name *is* defined in this module, so it doesn't need to
2159 make them indirect. */
2161 darwin_asm_declare_object_name (FILE *file
,
2162 const char *nam
, tree decl
)
2164 const char *xname
= nam
;
2165 unsigned HOST_WIDE_INT size
;
2166 bool local_def
, weak
;
2168 weak
= (DECL_P (decl
)
2170 && !lookup_attribute ("weak_import",
2171 DECL_ATTRIBUTES (decl
)));
2173 local_def
= DECL_INITIAL (decl
) || (TREE_STATIC (decl
)
2174 && (!DECL_COMMON (decl
)
2175 || !TREE_PUBLIC (decl
)));
2177 if (GET_CODE (XEXP (DECL_RTL (decl
), 0)) != SYMBOL_REF
)
2178 xname
= IDENTIFIER_POINTER (DECL_NAME (decl
));
2182 (* targetm
.encode_section_info
) (decl
, DECL_RTL (decl
), false);
2184 machopic_define_symbol (DECL_RTL (decl
));
2187 size
= tree_to_uhwi (DECL_SIZE_UNIT (decl
));
2189 #ifdef DEBUG_DARWIN_MEM_ALLOCATORS
2190 fprintf (file
, "# dadon: %s %s (%llu, %u) local %d weak %d"
2191 " stat %d com %d pub %d t-const %d t-ro %d init %lx\n",
2192 xname
, (TREE_CODE (decl
) == VAR_DECL
?"var":"const"),
2193 (unsigned long long)size
, DECL_ALIGN (decl
), local_def
,
2194 DECL_WEAK (decl
), TREE_STATIC (decl
), DECL_COMMON (decl
),
2195 TREE_PUBLIC (decl
), TREE_CONSTANT (decl
), TREE_READONLY (decl
),
2196 (unsigned long)DECL_INITIAL (decl
));
2199 /* Darwin needs help to support local zero-sized objects.
2200 They must be made at least one byte, and the section containing must be
2201 marked as unsuitable for section-anchors (see storage allocators below).
2203 For non-zero objects this output is handled by varasm.c.
2207 unsigned int l2align
= 0;
2209 /* The align must be honored, even for zero-sized. */
2210 if (DECL_ALIGN (decl
))
2212 l2align
= floor_log2 (DECL_ALIGN (decl
) / BITS_PER_UNIT
);
2213 fprintf (file
, "\t.align\t%u\n", l2align
);
2216 ASM_OUTPUT_LABEL (file
, xname
);
2218 fprintf (file
, "\t.space\t"HOST_WIDE_INT_PRINT_UNSIGNED
"\n", size
);
2220 /* Check that we've correctly picked up the zero-sized item and placed it
2222 gcc_assert ((!DARWIN_SECTION_ANCHORS
|| !flag_section_anchors
)
2224 && (in_section
->common
.flags
& SECTION_NO_ANCHOR
)));
2227 ASM_OUTPUT_LABEL (file
, xname
);
2230 /* The implementation of ASM_DECLARE_CONSTANT_NAME. */
2232 darwin_asm_declare_constant_name (FILE *file
, const char *name
,
2233 const_tree exp ATTRIBUTE_UNUSED
,
2236 assemble_label (file
, name
);
2237 /* As for other items, we need at least one byte. */
2240 fputs ("\t.space\t1\n", file
);
2241 /* Check that we've correctly picked up the zero-sized item and placed it
2243 gcc_assert ((!DARWIN_SECTION_ANCHORS
|| !flag_section_anchors
)
2245 && (in_section
->common
.flags
& SECTION_NO_ANCHOR
)));
2249 /* Darwin storage allocators.
2251 Zerofill sections are desirable for large blank data since, otherwise, these
2252 data bloat objects (PR33210).
2254 However, section anchors don't work in .zerofill sections (one cannot switch
2255 to a zerofill section). Ergo, for Darwin targets using section anchors we need
2256 to put (at least some) data into 'normal' switchable sections.
2258 Here we set a relatively arbitrary value for the size of an object to trigger
2259 zerofill when section anchors are enabled (anything bigger than a page for
2260 current Darwin implementations). FIXME: there ought to be some objective way
2261 to make this choice.
2263 When section anchor are off this is ignored anyway. */
2265 #define BYTES_ZFILL 4096
2267 /* Emit a chunk of data for items coalesced by the linker. */
2269 darwin_emit_weak_or_comdat (FILE *fp
, tree decl
, const char *name
,
2270 unsigned HOST_WIDE_INT size
,
2273 /* Since the sections used here are coalesed, they will not be eligible
2274 for section anchors, and therefore we don't need to break that out. */
2275 if (TREE_READONLY (decl
) || TREE_CONSTANT (decl
))
2276 switch_to_section (darwin_sections
[const_data_coal_section
]);
2278 switch_to_section (darwin_sections
[data_coal_section
]);
2280 /* To be consistent, we'll allow darwin_asm_declare_object_name to assemble
2281 the align info for zero-sized items... but do it here otherwise. */
2283 fprintf (fp
, "\t.align\t%d\n", floor_log2 (align
/ BITS_PER_UNIT
));
2285 if (TREE_PUBLIC (decl
))
2286 darwin_globalize_label (fp
, name
);
2288 /* ... and we let it deal with outputting one byte of zero for them too. */
2289 darwin_asm_declare_object_name (fp
, name
, decl
);
2291 assemble_zeros (size
);
2294 /* Emit a chunk of data for ObjC meta-data that got placed in BSS erroneously. */
2296 darwin_emit_objc_zeroed (FILE *fp
, tree decl
, const char *name
,
2297 unsigned HOST_WIDE_INT size
,
2298 unsigned int align
, tree meta
)
2300 section
*ocs
= data_section
;
2302 if (TREE_PURPOSE (meta
) == get_identifier("OBJC2META"))
2303 ocs
= darwin_objc2_section (decl
, meta
, ocs
);
2305 ocs
= darwin_objc1_section (decl
, meta
, ocs
);
2307 switch_to_section (ocs
);
2309 /* We shall declare that zero-sized meta-data are not valid (yet). */
2311 fprintf (fp
, "\t.align\t%d\n", floor_log2 (align
/ BITS_PER_UNIT
));
2313 /* ... and we let it deal with outputting one byte of zero for them too. */
2314 darwin_asm_declare_object_name (fp
, name
, decl
);
2315 assemble_zeros (size
);
2318 /* This routine emits 'local' storage:
2320 When Section Anchors are off this routine emits .zerofill commands in
2321 sections named for their alignment.
2323 When Section Anchors are on, smaller (non-zero-sized) items are placed in
2324 the .static_data section so that the section anchoring system can see them.
2325 Larger items are still placed in .zerofill sections, addressing PR33210.
2326 The routine has no checking - it is all assumed to be done by the caller.
2329 darwin_emit_local_bss (FILE *fp
, tree decl
, const char *name
,
2330 unsigned HOST_WIDE_INT size
,
2331 unsigned int l2align
)
2333 /* FIXME: We have a fudge to make this work with Java even when the target does
2334 not use sections anchors -- Java seems to need at least one small item in a
2335 non-zerofill segment. */
2336 if ((DARWIN_SECTION_ANCHORS
&& flag_section_anchors
&& size
< BYTES_ZFILL
)
2337 || (size
&& size
<= 2))
2339 /* Put smaller objects in _static_data, where the section anchors system
2341 However, if they are zero-sized punt them to yet a different section
2342 (that is not allowed to participate in anchoring). */
2345 fputs ("\t.section\t__DATA,__zobj_bss\n", fp
);
2346 in_section
= darwin_sections
[zobj_bss_section
];
2351 fputs ("\t.static_data\n", fp
);
2352 in_section
= darwin_sections
[static_data_section
];
2356 fprintf (fp
, "\t.align\t%u\n", l2align
);
2358 assemble_name (fp
, name
);
2359 fprintf (fp
, ":\n\t.space\t"HOST_WIDE_INT_PRINT_UNSIGNED
"\n", size
);
2363 /* When we are on a non-section anchor target, we can get zero-sized
2364 items here. However, all we need to do is to bump them to one byte
2365 and the section alignment will take care of the rest. */
2367 unsigned int flags
;
2368 snprintf (secnam
, 64, "__DATA,__%sbss%u", ((size
)?"":"zo_"),
2369 (unsigned) l2align
);
2370 /* We can't anchor (yet, if ever) in zerofill sections, because we can't
2371 switch to them and emit a label. */
2372 flags
= SECTION_BSS
|SECTION_WRITE
|SECTION_NO_ANCHOR
;
2373 in_section
= get_section (secnam
, flags
, NULL
);
2374 fprintf (fp
, "\t.zerofill %s,", secnam
);
2375 assemble_name (fp
, name
);
2380 fprintf (fp
, ","HOST_WIDE_INT_PRINT_UNSIGNED
",%u\n",
2381 size
, (unsigned) l2align
);
2383 fprintf (fp
, ","HOST_WIDE_INT_PRINT_UNSIGNED
"\n", size
);
2386 (*targetm
.encode_section_info
) (decl
, DECL_RTL (decl
), false);
2387 /* This is defined as a file-scope var, so we know to notify machopic. */
2388 machopic_define_symbol (DECL_RTL (decl
));
2391 /* Emit a chunk of common. */
2393 darwin_emit_common (FILE *fp
, const char *name
,
2394 unsigned HOST_WIDE_INT size
, unsigned int align
)
2396 unsigned HOST_WIDE_INT rounded
;
2397 unsigned int l2align
;
2399 /* Earlier systems complain if the alignment exceeds the page size.
2400 The magic number is 4096 * 8 - hard-coded for legacy systems. */
2401 if (!emit_aligned_common
&& (align
> 32768UL))
2402 align
= 4096UL; /* In units. */
2404 align
/= BITS_PER_UNIT
;
2406 /* Make sure we have a meaningful align. */
2410 /* For earlier toolchains, we need to emit the var as a rounded size to
2411 tell ld the alignment. */
2415 rounded
= (size
+ (align
-1)) & ~(align
-1);
2417 l2align
= floor_log2 (align
);
2418 gcc_assert (l2align
<= L2_MAX_OFILE_ALIGNMENT
);
2420 in_section
= comm_section
;
2421 /* We mustn't allow multiple public symbols to share an address when using
2422 the normal OSX toolchain. */
2425 /* Put at least one byte. */
2427 /* This section can no longer participate in section anchoring. */
2428 comm_section
->common
.flags
|= SECTION_NO_ANCHOR
;
2431 fputs ("\t.comm\t", fp
);
2432 assemble_name (fp
, name
);
2433 fprintf (fp
, "," HOST_WIDE_INT_PRINT_UNSIGNED
,
2434 emit_aligned_common
?size
:rounded
);
2435 if (l2align
&& emit_aligned_common
)
2436 fprintf (fp
, ",%u", l2align
);
2440 /* Output a var which is all zero - into aligned BSS sections, common, lcomm
2441 or coalescable data sections (for weak or comdat) as appropriate. */
2444 darwin_output_aligned_bss (FILE *fp
, tree decl
, const char *name
,
2445 unsigned HOST_WIDE_INT size
, unsigned int align
)
2447 unsigned int l2align
;
2448 bool one
, pub
, weak
;
2451 pub
= TREE_PUBLIC (decl
);
2452 one
= DECL_ONE_ONLY (decl
);
2453 weak
= (DECL_P (decl
)
2455 && !lookup_attribute ("weak_import",
2456 DECL_ATTRIBUTES (decl
)));
2458 #ifdef DEBUG_DARWIN_MEM_ALLOCATORS
2459 fprintf (fp
, "# albss: %s (%lld,%d) ro %d cst %d stat %d com %d"
2460 " pub %d weak %d one %d init %lx\n",
2461 name
, (long long)size
, (int)align
, TREE_READONLY (decl
),
2462 TREE_CONSTANT (decl
), TREE_STATIC (decl
), DECL_COMMON (decl
),
2463 pub
, weak
, one
, (unsigned long)DECL_INITIAL (decl
));
2466 /* ObjC metadata can get put in BSS because varasm.c decides it's BSS
2467 before the target has a chance to comment. */
2468 if ((meta
= is_objc_metadata (decl
)))
2470 darwin_emit_objc_zeroed (fp
, decl
, name
, size
, DECL_ALIGN (decl
), meta
);
2474 /* Check that any initializer is valid. */
2475 gcc_assert ((DECL_INITIAL (decl
) == NULL
)
2476 || (DECL_INITIAL (decl
) == error_mark_node
)
2477 || initializer_zerop (DECL_INITIAL (decl
)));
2479 gcc_assert (DECL_SECTION_NAME (decl
) == NULL
);
2480 gcc_assert (!DECL_COMMON (decl
));
2482 /* Pick up the correct alignment. */
2483 if (!size
|| !align
)
2484 align
= DECL_ALIGN (decl
);
2486 l2align
= floor_log2 (align
/ BITS_PER_UNIT
);
2487 gcc_assert (l2align
<= L2_MAX_OFILE_ALIGNMENT
);
2489 last_assemble_variable_decl
= decl
;
2491 /* We would rather not have to check this here - but it seems that we might
2492 be passed a decl that should be in coalesced space. */
2495 /* Weak or COMDAT objects are put in mergeable sections. */
2496 darwin_emit_weak_or_comdat (fp
, decl
, name
, size
,
2501 /* If this is not public, then emit according to local rules. */
2504 darwin_emit_local_bss (fp
, decl
, name
, size
, l2align
);
2508 /* So we have a public symbol (small item fudge for Java, see above). */
2509 if ((DARWIN_SECTION_ANCHORS
&& flag_section_anchors
&& size
< BYTES_ZFILL
)
2510 || (size
&& size
<= 2))
2512 /* Put smaller objects in data, where the section anchors system can get
2513 them. However, if they are zero-sized punt them to yet a different
2514 section (that is not allowed to participate in anchoring). */
2517 fputs ("\t.section\t__DATA,__zobj_data\n", fp
);
2518 in_section
= darwin_sections
[zobj_data_section
];
2523 fputs ("\t.data\n", fp
);
2524 in_section
= data_section
;
2528 fprintf (fp
, "\t.align\t%u\n", l2align
);
2530 assemble_name (fp
, name
);
2531 fprintf (fp
, ":\n\t.space\t"HOST_WIDE_INT_PRINT_UNSIGNED
"\n", size
);
2536 unsigned int flags
;
2537 /* When we are on a non-section anchor target, we can get zero-sized
2538 items here. However, all we need to do is to bump them to one byte
2539 and the section alignment will take care of the rest. */
2540 snprintf (secnam
, 64, "__DATA,__%spu_bss%u", ((size
)?"":"zo_"), l2align
);
2542 /* We can't anchor in zerofill sections, because we can't switch
2543 to them and emit a label. */
2544 flags
= SECTION_BSS
|SECTION_WRITE
|SECTION_NO_ANCHOR
;
2545 in_section
= get_section (secnam
, flags
, NULL
);
2546 fprintf (fp
, "\t.zerofill %s,", secnam
);
2547 assemble_name (fp
, name
);
2552 fprintf (fp
, ","HOST_WIDE_INT_PRINT_UNSIGNED
",%u\n", size
, l2align
);
2554 fprintf (fp
, ","HOST_WIDE_INT_PRINT_UNSIGNED
"\n", size
);
2556 (* targetm
.encode_section_info
) (decl
, DECL_RTL (decl
), false);
2559 /* Output a chunk of common, with alignment specified (where the target
2562 darwin_asm_output_aligned_decl_common (FILE *fp
, tree decl
, const char *name
,
2563 unsigned HOST_WIDE_INT size
,
2566 unsigned int l2align
;
2570 /* No corresponding var. */
2573 #ifdef DEBUG_DARWIN_MEM_ALLOCATORS
2574 fprintf (fp
, "# adcom: %s (%d,%d) decl=0x0\n", name
, (int)size
, (int)align
);
2576 darwin_emit_common (fp
, name
, size
, align
);
2580 one
= DECL_ONE_ONLY (decl
);
2581 weak
= (DECL_P (decl
)
2583 && !lookup_attribute ("weak_import",
2584 DECL_ATTRIBUTES (decl
)));
2586 #ifdef DEBUG_DARWIN_MEM_ALLOCATORS
2587 fprintf (fp
, "# adcom: %s (%lld,%d) ro %d cst %d stat %d com %d pub %d"
2588 " weak %d one %d init %lx\n",
2589 name
, (long long)size
, (int)align
, TREE_READONLY (decl
),
2590 TREE_CONSTANT (decl
), TREE_STATIC (decl
), DECL_COMMON (decl
),
2591 TREE_PUBLIC (decl
), weak
, one
, (unsigned long)DECL_INITIAL (decl
));
2594 /* ObjC metadata can get put in BSS because varasm.c decides it's BSS
2595 before the target has a chance to comment. */
2596 if ((meta
= is_objc_metadata (decl
)))
2598 darwin_emit_objc_zeroed (fp
, decl
, name
, size
, DECL_ALIGN (decl
), meta
);
2602 /* We shouldn't be messing with this if the decl has a section name. */
2603 gcc_assert (DECL_SECTION_NAME (decl
) == NULL
);
2605 /* We would rather not have to check this here - but it seems that we might
2606 be passed a decl that should be in coalesced space. */
2609 /* Weak or COMDAT objects are put in mergable sections. */
2610 darwin_emit_weak_or_comdat (fp
, decl
, name
, size
,
2615 /* We should only get here for DECL_COMMON, with a zero init (and, in
2616 principle, only for public symbols too - although we deal with local
2619 /* Check the initializer is OK. */
2620 gcc_assert (DECL_COMMON (decl
)
2621 && ((DECL_INITIAL (decl
) == NULL
)
2622 || (DECL_INITIAL (decl
) == error_mark_node
)
2623 || initializer_zerop (DECL_INITIAL (decl
))));
2625 last_assemble_variable_decl
= decl
;
2627 if (!size
|| !align
)
2628 align
= DECL_ALIGN (decl
);
2630 l2align
= floor_log2 (align
/ BITS_PER_UNIT
);
2631 /* Check we aren't asking for more aligment than the platform allows. */
2632 gcc_assert (l2align
<= L2_MAX_OFILE_ALIGNMENT
);
2634 if (TREE_PUBLIC (decl
) != 0)
2635 darwin_emit_common (fp
, name
, size
, align
);
2637 darwin_emit_local_bss (fp
, decl
, name
, size
, l2align
);
2640 /* Output a chunk of BSS with alignment specfied. */
2642 darwin_asm_output_aligned_decl_local (FILE *fp
, tree decl
, const char *name
,
2643 unsigned HOST_WIDE_INT size
,
2646 unsigned long l2align
;
2650 one
= DECL_ONE_ONLY (decl
);
2651 weak
= (DECL_P (decl
)
2653 && !lookup_attribute ("weak_import",
2654 DECL_ATTRIBUTES (decl
)));
2656 #ifdef DEBUG_DARWIN_MEM_ALLOCATORS
2657 fprintf (fp
, "# adloc: %s (%lld,%d) ro %d cst %d stat %d one %d pub %d"
2658 " weak %d init %lx\n",
2659 name
, (long long)size
, (int)align
, TREE_READONLY (decl
),
2660 TREE_CONSTANT (decl
), TREE_STATIC (decl
), one
, TREE_PUBLIC (decl
),
2661 weak
, (unsigned long)DECL_INITIAL (decl
));
2664 /* ObjC metadata can get put in BSS because varasm.c decides it's BSS
2665 before the target has a chance to comment. */
2666 if ((meta
= is_objc_metadata (decl
)))
2668 darwin_emit_objc_zeroed (fp
, decl
, name
, size
, DECL_ALIGN (decl
), meta
);
2672 /* We shouldn't be messing with this if the decl has a section name. */
2673 gcc_assert (DECL_SECTION_NAME (decl
) == NULL
);
2675 /* We would rather not have to check this here - but it seems that we might
2676 be passed a decl that should be in coalesced space. */
2679 /* Weak or COMDAT objects are put in mergable sections. */
2680 darwin_emit_weak_or_comdat (fp
, decl
, name
, size
,
2685 /* .. and it should be suitable for placement in local mem. */
2686 gcc_assert(!TREE_PUBLIC (decl
) && !DECL_COMMON (decl
));
2687 /* .. and any initializer must be all-zero. */
2688 gcc_assert ((DECL_INITIAL (decl
) == NULL
)
2689 || (DECL_INITIAL (decl
) == error_mark_node
)
2690 || initializer_zerop (DECL_INITIAL (decl
)));
2692 last_assemble_variable_decl
= decl
;
2694 if (!size
|| !align
)
2695 align
= DECL_ALIGN (decl
);
2697 l2align
= floor_log2 (align
/ BITS_PER_UNIT
);
2698 gcc_assert (l2align
<= L2_MAX_OFILE_ALIGNMENT
);
2700 darwin_emit_local_bss (fp
, decl
, name
, size
, l2align
);
2703 /* Emit an assembler directive to set visibility for a symbol. The
2704 only supported visibilities are VISIBILITY_DEFAULT and
2705 VISIBILITY_HIDDEN; the latter corresponds to Darwin's "private
2706 extern". There is no MACH-O equivalent of ELF's
2707 VISIBILITY_INTERNAL or VISIBILITY_PROTECTED. */
2710 darwin_assemble_visibility (tree decl
, int vis
)
2712 if (vis
== VISIBILITY_DEFAULT
)
2714 else if (vis
== VISIBILITY_HIDDEN
|| vis
== VISIBILITY_INTERNAL
)
2716 fputs ("\t.private_extern ", asm_out_file
);
2717 assemble_name (asm_out_file
,
2718 (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
))));
2719 fputs ("\n", asm_out_file
);
2722 warning (OPT_Wattributes
, "protected visibility attribute "
2723 "not supported in this configuration; ignored");
2726 /* vec used by darwin_asm_dwarf_section.
2727 Maybe a hash tab would be better here - but the intention is that this is
2728 a very short list (fewer than 16 items) and each entry should (ideally,
2729 eventually) only be presented once.
2731 A structure to hold a dwarf debug section used entry. */
2733 typedef struct GTY(()) dwarf_sect_used_entry
{
2737 dwarf_sect_used_entry
;
2740 /* A list of used __DWARF sections. */
2741 static GTY (()) vec
<dwarf_sect_used_entry
, va_gc
> *dwarf_sect_names_table
;
2743 /* This is called when we are asked to assemble a named section and the
2744 name begins with __DWARF,. We keep a list of the section names (without
2745 the __DWARF, prefix) and use this to emit our required start label on the
2746 first switch to each section. */
2749 darwin_asm_dwarf_section (const char *name
, unsigned int flags
,
2750 tree
ARG_UNUSED (decl
))
2755 dwarf_sect_used_entry
*ref
;
2757 gcc_assert ((flags
& (SECTION_DEBUG
| SECTION_NAMED
))
2758 == (SECTION_DEBUG
| SECTION_NAMED
));
2759 /* We know that the name starts with __DWARF, */
2761 namelen
= strchr (sname
, ',') - sname
;
2762 gcc_assert (namelen
);
2763 if (dwarf_sect_names_table
== NULL
)
2764 vec_alloc (dwarf_sect_names_table
, 16);
2767 dwarf_sect_names_table
->iterate (i
, &ref
);
2772 if (!strcmp (ref
->name
, sname
))
2780 fprintf (asm_out_file
, "\t.section %s\n", name
);
2783 dwarf_sect_used_entry e
;
2784 fprintf (asm_out_file
, "Lsection%.*s:\n", namelen
, sname
);
2786 e
.name
= xstrdup (sname
);
2787 vec_safe_push (dwarf_sect_names_table
, e
);
2791 /* Output a difference of two labels that will be an assembly time
2792 constant if the two labels are local. (.long lab1-lab2 will be
2793 very different if lab1 is at the boundary between two sections; it
2794 will be relocated according to the second section, not the first,
2795 so one ends up with a difference between labels in different
2796 sections, which is bad in the dwarf2 eh context for instance.) */
2798 static int darwin_dwarf_label_counter
;
2801 darwin_asm_output_dwarf_delta (FILE *file
, int size
,
2802 const char *lab1
, const char *lab2
)
2804 int islocaldiff
= (lab1
[0] == '*' && lab1
[1] == 'L'
2805 && lab2
[0] == '*' && lab2
[1] == 'L');
2806 const char *directive
= (size
== 8 ? ".quad" : ".long");
2809 fprintf (file
, "\t.set L$set$%d,", darwin_dwarf_label_counter
);
2811 fprintf (file
, "\t%s\t", directive
);
2813 assemble_name_raw (file
, lab1
);
2814 fprintf (file
, "-");
2815 assemble_name_raw (file
, lab2
);
2817 fprintf (file
, "\n\t%s L$set$%d", directive
, darwin_dwarf_label_counter
++);
2820 /* Output an offset in a DWARF section on Darwin. On Darwin, DWARF section
2821 offsets are not represented using relocs in .o files; either the
2822 section never leaves the .o file, or the linker or other tool is
2823 responsible for parsing the DWARF and updating the offsets. */
2826 darwin_asm_output_dwarf_offset (FILE *file
, int size
, const char * lab
,
2832 gcc_assert (base
->common
.flags
& SECTION_NAMED
);
2833 gcc_assert (strncmp (base
->named
.name
, "__DWARF,", 8) == 0);
2834 gcc_assert (strchr (base
->named
.name
+ 8, ','));
2836 namelen
= strchr (base
->named
.name
+ 8, ',') - (base
->named
.name
+ 8);
2837 sprintf (sname
, "*Lsection%.*s", namelen
, base
->named
.name
+ 8);
2838 darwin_asm_output_dwarf_delta (file
, size
, lab
, sname
);
2841 /* Called from the within the TARGET_ASM_FILE_START for each target. */
2844 darwin_file_start (void)
2846 /* Nothing to do. */
2849 /* Called for the TARGET_ASM_FILE_END hook.
2850 Emit the mach-o pic indirection data, the lto data and, finally a flag
2851 to tell the linker that it can break the file object into sections and
2852 move those around for efficiency. */
2855 darwin_file_end (void)
2857 if (!vec_safe_is_empty (ctors
))
2859 if (!vec_safe_is_empty (dtors
))
2862 /* If we are expecting to output NeXT ObjC meta-data, (and we actually see
2863 some) then we output the fix-and-continue marker (Image Info).
2864 This applies to Objective C, Objective C++ and LTO with either language
2865 as part of the input. */
2866 if (flag_next_runtime
&& objc_metadata_seen
)
2868 unsigned int flags
= 0;
2869 if (flag_objc_abi
>= 2)
2872 output_section_asm_op
2873 (darwin_sections
[objc2_image_info_section
]->unnamed
.data
);
2876 output_section_asm_op
2877 (darwin_sections
[objc_image_info_section
]->unnamed
.data
);
2879 ASM_OUTPUT_ALIGN (asm_out_file
, 2);
2880 fputs ("L_OBJC_ImageInfo:\n", asm_out_file
);
2882 flags
|= (flag_replace_objc_classes
&& classes_seen
) ? 1 : 0;
2883 flags
|= flag_objc_gc
? 2 : 0;
2885 fprintf (asm_out_file
, "\t.long\t0\n\t.long\t%u\n", flags
);
2888 machopic_finish (asm_out_file
);
2889 if (strcmp (lang_hooks
.name
, "GNU C++") == 0)
2891 switch_to_section (darwin_sections
[constructor_section
]);
2892 switch_to_section (darwin_sections
[destructor_section
]);
2893 ASM_OUTPUT_ALIGN (asm_out_file
, 1);
2896 /* If there was LTO assembler output, append it to asm_out_file. */
2897 if (lto_asm_out_name
)
2900 char *buf
, *lto_asm_txt
;
2902 /* Shouldn't be here if we failed to switch back. */
2903 gcc_assert (! saved_asm_out_file
);
2905 lto_asm_out_file
= fopen (lto_asm_out_name
, "r");
2906 if (lto_asm_out_file
== NULL
)
2907 fatal_error ("failed to open temporary file %s with LTO output",
2909 fseek (lto_asm_out_file
, 0, SEEK_END
);
2910 n
= ftell (lto_asm_out_file
);
2913 fseek (lto_asm_out_file
, 0, SEEK_SET
);
2914 lto_asm_txt
= buf
= (char *) xmalloc (n
+ 1);
2915 while (fgets (lto_asm_txt
, n
, lto_asm_out_file
))
2916 fputs (lto_asm_txt
, asm_out_file
);
2917 /* Put a termination label. */
2918 fprintf (asm_out_file
, "\t.section %s,%s,regular,debug\n",
2919 LTO_SEGMENT_NAME
, LTO_SECTS_SECTION
);
2920 fprintf (asm_out_file
, "L_GNU_LTO%d:\t;# end of lto\n",
2922 /* Make sure our termination label stays in this section. */
2923 fputs ("\t.space\t1\n", asm_out_file
);
2926 /* Remove the temporary file. */
2927 fclose (lto_asm_out_file
);
2928 unlink_if_ordinary (lto_asm_out_name
);
2929 free (lto_asm_out_name
);
2932 /* Output the names and indices. */
2933 if (lto_section_names
&& lto_section_names
->length ())
2936 darwin_lto_section_e
*ref
;
2937 /* For now, we'll make the offsets 4 bytes and unaligned - we'll fix
2938 the latter up ourselves. */
2939 const char *op
= integer_asm_op (4,0);
2941 /* Emit the names. */
2942 fprintf (asm_out_file
, "\t.section %s,%s,regular,debug\n",
2943 LTO_SEGMENT_NAME
, LTO_NAMES_SECTION
);
2944 FOR_EACH_VEC_ELT (*lto_section_names
, count
, ref
)
2946 fprintf (asm_out_file
, "L_GNU_LTO_NAME%d:\n", count
);
2947 /* We have to jump through hoops to get the values of the intra-section
2949 fprintf (asm_out_file
,
2950 "\t.set L$gnu$lto$noff%d,L_GNU_LTO_NAME%d-L_GNU_LTO_NAME0\n",
2952 fprintf (asm_out_file
,
2953 "\t.set L$gnu$lto$nsiz%d,L_GNU_LTO_NAME%d-L_GNU_LTO_NAME%d\n",
2954 count
, count
+1, count
);
2955 fprintf (asm_out_file
, "\t.asciz\t\"%s\"\n", ref
->sectname
);
2957 fprintf (asm_out_file
, "L_GNU_LTO_NAME%d:\t;# end\n", lto_section_num
);
2958 /* make sure our termination label stays in this section. */
2959 fputs ("\t.space\t1\n", asm_out_file
);
2961 /* Emit the Index. */
2962 fprintf (asm_out_file
, "\t.section %s,%s,regular,debug\n",
2963 LTO_SEGMENT_NAME
, LTO_INDEX_SECTION
);
2964 fputs ("\t.align\t2\n", asm_out_file
);
2965 fputs ("# Section offset, Section length, Name offset, Name length\n",
2967 FOR_EACH_VEC_ELT (*lto_section_names
, count
, ref
)
2969 fprintf (asm_out_file
, "%s L$gnu$lto$offs%d\t;# %s\n",
2970 op
, count
, ref
->sectname
);
2971 fprintf (asm_out_file
, "%s L$gnu$lto$size%d\n", op
, count
);
2972 fprintf (asm_out_file
, "%s L$gnu$lto$noff%d\n", op
, count
);
2973 fprintf (asm_out_file
, "%s L$gnu$lto$nsiz%d\n", op
, count
);
2977 /* If we have section anchors, then we must prevent the linker from
2978 re-arranging data. */
2979 if (!DARWIN_SECTION_ANCHORS
|| !flag_section_anchors
)
2980 fprintf (asm_out_file
, "\t.subsections_via_symbols\n");
2983 /* TODO: Add a language hook for identifying if a decl is a vtable. */
2984 #define DARWIN_VTABLE_P(DECL) 0
2986 /* Cross-module name binding. Darwin does not support overriding
2987 functions at dynamic-link time, except for vtables in kexts. */
2990 darwin_binds_local_p (const_tree decl
)
2992 return default_binds_local_p_1 (decl
,
2993 TARGET_KEXTABI
&& DARWIN_VTABLE_P (decl
));
2996 /* The Darwin's implementation of TARGET_ASM_OUTPUT_ANCHOR. Define the
2997 anchor relative to ".", the current section position. We cannot use
2998 the default one because ASM_OUTPUT_DEF is wrong for Darwin. */
3000 darwin_asm_output_anchor (rtx symbol
)
3002 fprintf (asm_out_file
, "\t.set\t");
3003 assemble_name (asm_out_file
, XSTR (symbol
, 0));
3004 fprintf (asm_out_file
, ", . + " HOST_WIDE_INT_PRINT_DEC
"\n",
3005 SYMBOL_REF_BLOCK_OFFSET (symbol
));
3008 /* Disable section anchoring on any section containing a zero-sized
3011 darwin_use_anchors_for_symbol_p (const_rtx symbol
)
3013 if (DARWIN_SECTION_ANCHORS
&& flag_section_anchors
)
3016 /* If the section contains a zero-sized object it's ineligible. */
3017 sect
= SYMBOL_REF_BLOCK (symbol
)->sect
;
3018 /* This should have the effect of disabling anchors for vars that follow
3019 any zero-sized one, in a given section. */
3020 if (sect
->common
.flags
& SECTION_NO_ANCHOR
)
3023 /* Also check the normal reasons for suppressing. */
3024 return default_use_anchors_for_symbol_p (symbol
);
3030 /* Set the darwin specific attributes on TYPE. */
3032 darwin_set_default_type_attributes (tree type
)
3034 if (darwin_ms_struct
3035 && TREE_CODE (type
) == RECORD_TYPE
)
3036 TYPE_ATTRIBUTES (type
) = tree_cons (get_identifier ("ms_struct"),
3038 TYPE_ATTRIBUTES (type
));
3041 /* True, iff we're generating code for loadable kernel extensions. */
3044 darwin_kextabi_p (void) {
3045 return flag_apple_kext
;
3049 darwin_override_options (void)
3051 /* Keep track of which (major) version we're generating code for. */
3052 if (darwin_macosx_version_min
)
3054 if (strverscmp (darwin_macosx_version_min
, "10.6") >= 0)
3055 generating_for_darwin_version
= 10;
3056 else if (strverscmp (darwin_macosx_version_min
, "10.5") >= 0)
3057 generating_for_darwin_version
= 9;
3059 /* Earlier versions are not specifically accounted, until required. */
3062 /* In principle, this should be c-family only. However, we really need to
3063 set sensible defaults for LTO as well, since the section selection stuff
3064 should check for correctness re. the ABI. TODO: check and provide the
3065 flags (runtime & ABI) from the lto wrapper). */
3067 /* Unless set, force ABI=2 for NeXT and m64, 0 otherwise. */
3068 if (!global_options_set
.x_flag_objc_abi
)
3069 global_options
.x_flag_objc_abi
3070 = (!flag_next_runtime
)
3073 : (generating_for_darwin_version
>= 9) ? 1
3076 /* Objective-C family ABI 2 is only valid for next/m64 at present. */
3077 if (global_options_set
.x_flag_objc_abi
&& flag_next_runtime
)
3079 if (TARGET_64BIT
&& global_options
.x_flag_objc_abi
< 2)
3080 error_at (UNKNOWN_LOCATION
, "%<-fobjc-abi-version%> >= 2 must be"
3081 " used for %<-m64%> targets with"
3082 " %<-fnext-runtime%>");
3083 if (!TARGET_64BIT
&& global_options
.x_flag_objc_abi
>= 2)
3084 error_at (UNKNOWN_LOCATION
, "%<-fobjc-abi-version%> >= 2 is not"
3085 " supported on %<-m32%> targets with"
3086 " %<-fnext-runtime%>");
3089 /* Don't emit DWARF3/4 unless specifically selected. This is a
3090 workaround for tool bugs. */
3091 if (!global_options_set
.x_dwarf_strict
)
3093 if (!global_options_set
.x_dwarf_version
)
3096 /* Do not allow unwind tables to be generated by default for m32.
3097 fnon-call-exceptions will override this, regardless of what we do. */
3098 if (generating_for_darwin_version
< 10
3099 && !global_options_set
.x_flag_asynchronous_unwind_tables
3101 global_options
.x_flag_asynchronous_unwind_tables
= 0;
3103 /* Disable -freorder-blocks-and-partition when unwind tables are being
3104 emitted for Darwin < 9 (OSX 10.5).
3105 The strategy is, "Unless the User has specifically set/unset an unwind
3106 flag we will switch off -freorder-blocks-and-partition when unwind tables
3107 will be generated". If the User specifically sets flags... we assume
3108 (s)he knows why... */
3109 if (generating_for_darwin_version
< 9
3110 && global_options_set
.x_flag_reorder_blocks_and_partition
3111 && ((global_options
.x_flag_exceptions
/* User, c++, java */
3112 && !global_options_set
.x_flag_exceptions
) /* User specified... */
3113 || (global_options
.x_flag_unwind_tables
3114 && !global_options_set
.x_flag_unwind_tables
)
3115 || (global_options
.x_flag_non_call_exceptions
3116 && !global_options_set
.x_flag_non_call_exceptions
)
3117 || (global_options
.x_flag_asynchronous_unwind_tables
3118 && !global_options_set
.x_flag_asynchronous_unwind_tables
)))
3120 inform (input_location
,
3121 "-freorder-blocks-and-partition does not work with exceptions "
3122 "on this architecture");
3123 flag_reorder_blocks_and_partition
= 0;
3124 flag_reorder_blocks
= 1;
3127 /* FIXME: flag_objc_sjlj_exceptions is no longer needed since there is only
3128 one valid choice of exception scheme for each runtime. */
3129 if (!global_options_set
.x_flag_objc_sjlj_exceptions
)
3130 global_options
.x_flag_objc_sjlj_exceptions
=
3131 flag_next_runtime
&& !TARGET_64BIT
;
3133 /* FIXME: and this could be eliminated then too. */
3134 if (!global_options_set
.x_flag_exceptions
3135 && flag_objc_exceptions
3137 flag_exceptions
= 1;
3139 if (flag_mkernel
|| flag_apple_kext
)
3141 /* -mkernel implies -fapple-kext for C++ */
3142 if (strcmp (lang_hooks
.name
, "GNU C++") == 0)
3143 flag_apple_kext
= 1;
3147 /* No EH in kexts. */
3148 flag_exceptions
= 0;
3149 /* No -fnon-call-exceptions data in kexts. */
3150 flag_non_call_exceptions
= 0;
3151 /* so no tables either.. */
3152 flag_unwind_tables
= 0;
3153 flag_asynchronous_unwind_tables
= 0;
3154 /* We still need to emit branch islands for kernel context. */
3155 darwin_emit_branch_islands
= true;
3158 if (flag_var_tracking_uninit
== 0
3159 && generating_for_darwin_version
>= 9
3160 && (flag_gtoggle
? (debug_info_level
== DINFO_LEVEL_NONE
)
3161 : (debug_info_level
>= DINFO_LEVEL_NORMAL
))
3162 && write_symbols
== DWARF2_DEBUG
)
3163 flag_var_tracking_uninit
= flag_var_tracking
;
3165 if (MACHO_DYNAMIC_NO_PIC_P
)
3168 warning_at (UNKNOWN_LOCATION
, 0,
3169 "%<-mdynamic-no-pic%> overrides %<-fpic%>, %<-fPIC%>,"
3170 " %<-fpie%> or %<-fPIE%>");
3173 else if (flag_pic
== 1)
3175 /* Darwin's -fpic is -fPIC. */
3179 /* It is assumed that branch island stubs are needed for earlier systems. */
3180 if (generating_for_darwin_version
< 9)
3181 darwin_emit_branch_islands
= true;
3183 emit_aligned_common
= true; /* Later systems can support aligned common. */
3185 /* The c_dialect...() macros are not available to us here. */
3186 darwin_running_cxx
= (strstr (lang_hooks
.name
, "C++") != 0);
3190 /* Add $LDBL128 suffix to long double builtins for ppc darwin. */
3193 darwin_patch_builtin (enum built_in_function fncode
)
3195 tree fn
= builtin_decl_explicit (fncode
);
3202 sym
= DECL_ASSEMBLER_NAME (fn
);
3203 newname
= ACONCAT (("_", IDENTIFIER_POINTER (sym
), "$LDBL128", NULL
));
3205 set_user_assembler_name (fn
, newname
);
3207 fn
= builtin_decl_implicit (fncode
);
3209 set_user_assembler_name (fn
, newname
);
3213 darwin_patch_builtins (void)
3215 if (LONG_DOUBLE_TYPE_SIZE
!= 128)
3218 #define PATCH_BUILTIN(fncode) darwin_patch_builtin (fncode);
3219 #define PATCH_BUILTIN_NO64(fncode) \
3220 if (!TARGET_64BIT) \
3221 darwin_patch_builtin (fncode);
3222 #define PATCH_BUILTIN_VARIADIC(fncode) \
3224 && (strverscmp (darwin_macosx_version_min, "10.3.9") >= 0)) \
3225 darwin_patch_builtin (fncode);
3226 #include "darwin-ppc-ldouble-patch.def"
3227 #undef PATCH_BUILTIN
3228 #undef PATCH_BUILTIN_NO64
3229 #undef PATCH_BUILTIN_VARIADIC
3233 /* CFStrings implementation. */
3234 static GTY(()) tree cfstring_class_reference
= NULL_TREE
;
3235 static GTY(()) tree cfstring_type_node
= NULL_TREE
;
3236 static GTY(()) tree ccfstring_type_node
= NULL_TREE
;
3237 static GTY(()) tree pccfstring_type_node
= NULL_TREE
;
3238 static GTY(()) tree pcint_type_node
= NULL_TREE
;
3239 static GTY(()) tree pcchar_type_node
= NULL_TREE
;
3241 static enum built_in_function darwin_builtin_cfstring
;
3243 /* Store all constructed constant CFStrings in a hash table so that
3244 they get uniqued properly. */
3246 typedef struct GTY (()) cfstring_descriptor
{
3247 /* The string literal. */
3249 /* The resulting constant CFString. */
3251 } cfstring_descriptor
;
3253 static GTY ((param_is (struct cfstring_descriptor
))) htab_t cfstring_htab
;
3255 static hashval_t
cfstring_hash (const void *);
3256 static int cfstring_eq (const void *, const void *);
3259 add_builtin_field_decl (tree type
, const char *name
, tree
**chain
)
3261 tree field
= build_decl (BUILTINS_LOCATION
, FIELD_DECL
,
3262 get_identifier (name
), type
);
3266 *chain
= &DECL_CHAIN (field
);
3272 darwin_init_cfstring_builtins (unsigned builtin_cfstring
)
3274 tree cfsfun
, fields
, pccfstring_ftype_pcchar
;
3277 darwin_builtin_cfstring
=
3278 (enum built_in_function
) builtin_cfstring
;
3280 /* struct __builtin_CFString {
3281 const int *isa; (will point at
3282 int flags; __CFConstantStringClassReference)
3287 pcint_type_node
= build_pointer_type
3288 (build_qualified_type (integer_type_node
, TYPE_QUAL_CONST
));
3290 pcchar_type_node
= build_pointer_type
3291 (build_qualified_type (char_type_node
, TYPE_QUAL_CONST
));
3293 cfstring_type_node
= (*lang_hooks
.types
.make_type
) (RECORD_TYPE
);
3295 /* Have to build backwards for finish struct. */
3296 fields
= add_builtin_field_decl (long_integer_type_node
, "length", &chain
);
3297 add_builtin_field_decl (pcchar_type_node
, "str", &chain
);
3298 add_builtin_field_decl (integer_type_node
, "flags", &chain
);
3299 add_builtin_field_decl (pcint_type_node
, "isa", &chain
);
3300 finish_builtin_struct (cfstring_type_node
, "__builtin_CFString",
3303 /* const struct __builtin_CFstring *
3304 __builtin___CFStringMakeConstantString (const char *); */
3306 ccfstring_type_node
= build_qualified_type
3307 (cfstring_type_node
, TYPE_QUAL_CONST
);
3308 pccfstring_type_node
= build_pointer_type (ccfstring_type_node
);
3309 pccfstring_ftype_pcchar
= build_function_type_list
3310 (pccfstring_type_node
, pcchar_type_node
, NULL_TREE
);
3312 cfsfun
= build_decl (BUILTINS_LOCATION
, FUNCTION_DECL
,
3313 get_identifier ("__builtin___CFStringMakeConstantString"),
3314 pccfstring_ftype_pcchar
);
3316 TREE_PUBLIC (cfsfun
) = 1;
3317 DECL_EXTERNAL (cfsfun
) = 1;
3318 DECL_ARTIFICIAL (cfsfun
) = 1;
3319 /* Make a lang-specific section - dup_lang_specific_decl makes a new node
3320 in place of the existing, which may be NULL. */
3321 DECL_LANG_SPECIFIC (cfsfun
) = NULL
;
3322 (*lang_hooks
.dup_lang_specific_decl
) (cfsfun
);
3323 DECL_BUILT_IN_CLASS (cfsfun
) = BUILT_IN_MD
;
3324 DECL_FUNCTION_CODE (cfsfun
) = darwin_builtin_cfstring
;
3325 lang_hooks
.builtin_function (cfsfun
);
3327 /* extern int __CFConstantStringClassReference[]; */
3328 cfstring_class_reference
= build_decl (BUILTINS_LOCATION
, VAR_DECL
,
3329 get_identifier ("__CFConstantStringClassReference"),
3330 build_array_type (integer_type_node
, NULL_TREE
));
3332 TREE_PUBLIC (cfstring_class_reference
) = 1;
3333 DECL_ARTIFICIAL (cfstring_class_reference
) = 1;
3334 (*lang_hooks
.decls
.pushdecl
) (cfstring_class_reference
);
3335 DECL_EXTERNAL (cfstring_class_reference
) = 1;
3336 rest_of_decl_compilation (cfstring_class_reference
, 0, 0);
3338 /* Initialize the hash table used to hold the constant CFString objects. */
3339 cfstring_htab
= htab_create_ggc (31, cfstring_hash
, cfstring_eq
, NULL
);
3341 return cfstring_type_node
;
3345 darwin_fold_builtin (tree fndecl
, int n_args
, tree
*argp
,
3346 bool ARG_UNUSED (ignore
))
3348 unsigned int fcode
= DECL_FUNCTION_CODE (fndecl
);
3350 if (fcode
== darwin_builtin_cfstring
)
3352 if (!darwin_constant_cfstrings
)
3354 error ("built-in function %qD requires the"
3355 " %<-mconstant-cfstrings%> flag", fndecl
);
3356 return error_mark_node
;
3361 error ("built-in function %qD takes one argument only", fndecl
);
3362 return error_mark_node
;
3365 return darwin_build_constant_cfstring (*argp
);
3372 darwin_rename_builtins (void)
3374 /* The system ___divdc3 routine in libSystem on darwin10 is not
3375 accurate to 1ulp, ours is, so we avoid ever using the system name
3376 for this routine and instead install a non-conflicting name that
3379 When -ffast-math or -funsafe-math-optimizations is given, we can
3380 use the faster version. */
3381 if (!flag_unsafe_math_optimizations
)
3383 enum built_in_function dcode
3384 = (enum built_in_function
)(BUILT_IN_COMPLEX_DIV_MIN
3385 + DCmode
- MIN_MODE_COMPLEX_FLOAT
);
3386 tree fn
= builtin_decl_explicit (dcode
);
3387 /* Fortran and c call TARGET_INIT_BUILTINS and
3388 TARGET_INIT_LIBFUNCS at different times, so we have to put a
3389 call into each to ensure that at least one of them is called
3390 after build_common_builtin_nodes. A better fix is to add a
3391 new hook to run after build_common_builtin_nodes runs. */
3393 set_user_assembler_name (fn
, "___ieee_divdc3");
3394 fn
= builtin_decl_implicit (dcode
);
3396 set_user_assembler_name (fn
, "___ieee_divdc3");
3401 darwin_libc_has_function (enum function_class fn_class
)
3403 if (fn_class
== function_sincos
)
3405 if (fn_class
== function_c99_math_complex
3406 || fn_class
== function_c99_misc
)
3407 return (TARGET_64BIT
3408 || strverscmp (darwin_macosx_version_min
, "10.3") >= 0);
3414 cfstring_hash (const void *ptr
)
3416 tree str
= ((const struct cfstring_descriptor
*)ptr
)->literal
;
3417 const unsigned char *p
= (const unsigned char *) TREE_STRING_POINTER (str
);
3418 int i
, len
= TREE_STRING_LENGTH (str
);
3421 for (i
= 0; i
< len
; i
++)
3422 h
= ((h
* 613) + p
[i
]);
3428 cfstring_eq (const void *ptr1
, const void *ptr2
)
3430 tree str1
= ((const struct cfstring_descriptor
*)ptr1
)->literal
;
3431 tree str2
= ((const struct cfstring_descriptor
*)ptr2
)->literal
;
3432 int len1
= TREE_STRING_LENGTH (str1
);
3434 return (len1
== TREE_STRING_LENGTH (str2
)
3435 && !memcmp (TREE_STRING_POINTER (str1
), TREE_STRING_POINTER (str2
),
3440 darwin_build_constant_cfstring (tree str
)
3442 struct cfstring_descriptor
*desc
, key
;
3448 error ("CFString literal is missing");
3449 return error_mark_node
;
3454 if (TREE_CODE (str
) == ADDR_EXPR
)
3455 str
= TREE_OPERAND (str
, 0);
3457 if (TREE_CODE (str
) != STRING_CST
)
3459 error ("CFString literal expression is not a string constant");
3460 return error_mark_node
;
3463 /* Perhaps we already constructed a constant CFString just like this one? */
3465 loc
= htab_find_slot (cfstring_htab
, &key
, INSERT
);
3466 desc
= (struct cfstring_descriptor
*) *loc
;
3470 tree var
, constructor
, field
;
3471 vec
<constructor_elt
, va_gc
> *v
= NULL
;
3472 int length
= TREE_STRING_LENGTH (str
) - 1;
3474 if (darwin_warn_nonportable_cfstrings
)
3476 const char *s
= TREE_STRING_POINTER (str
);
3479 for (l
= 0; l
< length
; l
++)
3480 if (!s
[l
] || !isascii (s
[l
]))
3482 warning (darwin_warn_nonportable_cfstrings
, "%s in CFString literal",
3483 s
[l
] ? "non-ASCII character" : "embedded NUL");
3488 *loc
= desc
= ggc_alloc_cleared_cfstring_descriptor ();
3489 desc
->literal
= str
;
3492 field
= TYPE_FIELDS (ccfstring_type_node
);
3493 CONSTRUCTOR_APPEND_ELT(v
, NULL_TREE
,
3494 build1 (ADDR_EXPR
, TREE_TYPE (field
),
3495 cfstring_class_reference
));
3497 field
= DECL_CHAIN (field
);
3498 CONSTRUCTOR_APPEND_ELT(v
, NULL_TREE
,
3499 build_int_cst (TREE_TYPE (field
), 0x000007c8));
3501 field
= DECL_CHAIN (field
);
3502 CONSTRUCTOR_APPEND_ELT(v
, NULL_TREE
,
3503 build1 (ADDR_EXPR
, TREE_TYPE (field
), str
));
3505 field
= DECL_CHAIN (field
);
3506 CONSTRUCTOR_APPEND_ELT(v
, NULL_TREE
,
3507 build_int_cst (TREE_TYPE (field
), length
));
3509 constructor
= build_constructor (ccfstring_type_node
, v
);
3510 TREE_READONLY (constructor
) = 1;
3511 TREE_CONSTANT (constructor
) = 1;
3512 TREE_STATIC (constructor
) = 1;
3514 /* Fromage: The C++ flavor of 'build_unary_op' expects constructor nodes
3515 to have the TREE_HAS_CONSTRUCTOR (...) bit set. However, this file is
3516 being built without any knowledge of C++ tree accessors; hence, we shall
3517 use the generic accessor that TREE_HAS_CONSTRUCTOR actually maps to! */
3518 if (darwin_running_cxx
)
3519 TREE_LANG_FLAG_4 (constructor
) = 1; /* TREE_HAS_CONSTRUCTOR */
3521 /* Create an anonymous global variable for this CFString. */
3522 var
= build_decl (input_location
, CONST_DECL
,
3523 NULL
, TREE_TYPE (constructor
));
3524 DECL_ARTIFICIAL (var
) = 1;
3525 TREE_STATIC (var
) = 1;
3526 DECL_INITIAL (var
) = constructor
;
3527 /* FIXME: This should use a translation_unit_decl to indicate file scope. */
3528 DECL_CONTEXT (var
) = NULL_TREE
;
3529 desc
->constructor
= var
;
3532 addr
= build1 (ADDR_EXPR
, pccfstring_type_node
, desc
->constructor
);
3533 TREE_CONSTANT (addr
) = 1;
3539 darwin_cfstring_p (tree str
)
3541 struct cfstring_descriptor key
;
3549 if (TREE_CODE (str
) == ADDR_EXPR
)
3550 str
= TREE_OPERAND (str
, 0);
3552 if (TREE_CODE (str
) != STRING_CST
)
3556 loc
= htab_find_slot (cfstring_htab
, &key
, NO_INSERT
);
3565 darwin_enter_string_into_cfstring_table (tree str
)
3567 struct cfstring_descriptor key
;
3571 loc
= htab_find_slot (cfstring_htab
, &key
, INSERT
);
3575 *loc
= ggc_alloc_cleared_cfstring_descriptor ();
3576 ((struct cfstring_descriptor
*)*loc
)->literal
= str
;
3580 /* Choose named function section based on its frequency. */
3583 darwin_function_section (tree decl
, enum node_frequency freq
,
3584 bool startup
, bool exit
)
3586 /* Decide if we need to put this in a coalescable section. */
3589 && (!DECL_ATTRIBUTES (decl
)
3590 || !lookup_attribute ("weak_import",
3591 DECL_ATTRIBUTES (decl
))));
3593 /* If there is a specified section name, we should not be trying to
3595 if (decl
&& DECL_SECTION_NAME (decl
) != NULL_TREE
)
3596 return get_named_section (decl
, NULL
, 0);
3598 /* Default when there is no function re-ordering. */
3599 if (!flag_reorder_functions
)
3601 ? darwin_sections
[text_coal_section
]
3604 /* Startup code should go to startup subsection unless it is
3605 unlikely executed (this happens especially with function splitting
3606 where we can split away unnecessary parts of static constructors). */
3607 if (startup
&& freq
!= NODE_FREQUENCY_UNLIKELY_EXECUTED
)
3609 ? darwin_sections
[text_startup_coal_section
]
3610 : darwin_sections
[text_startup_section
];
3612 /* Similarly for exit. */
3613 if (exit
&& freq
!= NODE_FREQUENCY_UNLIKELY_EXECUTED
)
3615 ? darwin_sections
[text_exit_coal_section
]
3616 : darwin_sections
[text_exit_section
];
3618 /* Group cold functions together, similarly for hot code. */
3621 case NODE_FREQUENCY_UNLIKELY_EXECUTED
:
3623 ? darwin_sections
[text_cold_coal_section
]
3624 : darwin_sections
[text_cold_section
];
3626 case NODE_FREQUENCY_HOT
:
3628 ? darwin_sections
[text_hot_coal_section
]
3629 : darwin_sections
[text_hot_section
];
3633 ? darwin_sections
[text_coal_section
]
3639 /* When a function is partitioned between sections, we need to insert a label
3640 at the start of each new chunk - so that it may become a valid 'atom' for
3641 eh and debug purposes. Without this the linker will emit warnings if one
3642 tries to add line location information (since the switched fragment will
3646 darwin_function_switched_text_sections (FILE *fp
, tree decl
, bool new_is_cold
)
3649 snprintf (buf
, 128, "%s%s",new_is_cold
?"__cold_sect_of_":"__hot_sect_of_",
3650 IDENTIFIER_POINTER (DECL_NAME (decl
)));
3651 /* Make sure we pick up all the relevant quotes etc. */
3652 assemble_name_raw (fp
, (const char *) buf
);
3656 #include "gt-darwin.h"