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/* Target definitions for Darwin (Mac OS X) systems.
2
   Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004,
3
   2005, 2007
4
   Free Software Foundation, Inc.
5
   Contributed by Apple Computer Inc.
6
 
7
This file is part of GCC.
8
 
9
GCC is free software; you can redistribute it and/or modify
10
it under the terms of the GNU General Public License as published by
11
the Free Software Foundation; either version 3, or (at your option)
12
any later version.
13
 
14
GCC is distributed in the hope that it will be useful,
15
but WITHOUT ANY WARRANTY; without even the implied warranty of
16
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17
GNU General Public License for more details.
18
 
19
You should have received a copy of the GNU General Public License
20
along with GCC; see the file COPYING.  If not, write to
21
the Free Software Foundation, 51 Franklin Street, Fifth Floor,
22
Boston, MA 02110-1301, USA.  */
23
 
24
#ifndef CONFIG_DARWIN_H
25
#define CONFIG_DARWIN_H
26
 
27
/* The definitions in this file are common to all processor types
28
   running Darwin, which is the kernel for Mac OS X.  Darwin is
29
   basically a BSD user layer laid over a Mach kernel, then evolved
30
   for many years (at NeXT) in parallel with other Unix systems.  So
31
   while the runtime is a somewhat idiosyncratic Mach-based thing,
32
   other definitions look like they would for a BSD variant.  */
33
 
34
/* Although NeXT ran on many different architectures, as of Jan 2001
35
   the only supported Darwin targets are PowerPC and x86.  */
36
 
37
/* One of Darwin's NeXT legacies is the Mach-O format, which is partly
38
   like a.out and partly like COFF, with additional features like
39
   multi-architecture binary support.  */
40
 
41
#define OBJECT_FORMAT_MACHO
42
 
43
/* Suppress g++ attempt to link in the math library automatically. */
44
#define MATH_LIBRARY ""
45
 
46
/* We have atexit.  */
47
 
48
#define HAVE_ATEXIT
49
 
50
/* Define an empty body for the function do_global_dtors() in libgcc2.c.  */
51
 
52
#define DO_GLOBAL_DTORS_BODY
53
 
54
/* The string value for __SIZE_TYPE__.  */
55
 
56
#ifndef SIZE_TYPE
57
#define SIZE_TYPE "long unsigned int"
58
#endif
59
 
60
/* Type used for ptrdiff_t, as a string used in a declaration.  */
61
 
62
#undef  PTRDIFF_TYPE
63
#define PTRDIFF_TYPE "int"
64
 
65
/* wchar_t is int.  */
66
 
67
#undef  WCHAR_TYPE
68
#define WCHAR_TYPE "int"
69
#undef  WCHAR_TYPE_SIZE
70
#define WCHAR_TYPE_SIZE 32
71
 
72
/* Default to using the NeXT-style runtime, since that's what is
73
   pre-installed on Darwin systems.  */
74
 
75
#define NEXT_OBJC_RUNTIME
76
 
77
/* Don't default to pcc-struct-return, because gcc is the only compiler, and
78
   we want to retain compatibility with older gcc versions.  */
79
 
80
#undef  DEFAULT_PCC_STRUCT_RETURN
81
#define DEFAULT_PCC_STRUCT_RETURN 0
82
 
83
/* True if pragma ms_struct is in effect.  */
84
extern GTY(()) int darwin_ms_struct;
85
 
86
/* This table intercepts weirdo options whose names would interfere
87
   with normal driver conventions, and either translates them into
88
   standardly-named options, or adds a 'Z' so that they can get to
89
   specs processing without interference.
90
 
91
   Do not expand a linker option to "-Xlinker -<option>", since that
92
   forfeits the ability to control via spec strings later.  However,
93
   as a special exception, do this translation with -filelist, because
94
   otherwise the driver will think there are no input files and quit.
95
   (The alternative would be to hack the driver to recognize -filelist
96
   specially, but it's simpler to use the translation table.)
97
 
98
   Note that an option name with a prefix that matches another option
99
   name, that also takes an argument, needs to be modified so the
100
   prefix is different, otherwise a '*' after the shorter option will
101
   match with the longer one.
102
 
103
   The SUBTARGET_OPTION_TRANSLATE_TABLE macro, which _must_ be defined
104
   in gcc/config/{i386,rs6000}/darwin.h, should contain any additional
105
   command-line option translations specific to the particular target
106
   architecture.  */
107
 
108
#define TARGET_OPTION_TRANSLATE_TABLE \
109
  { "-all_load", "-Zall_load" },  \
110
  { "-allowable_client", "-Zallowable_client" },  \
111
  { "-arch_errors_fatal", "-Zarch_errors_fatal" },  \
112
  { "-bind_at_load", "-Zbind_at_load" },  \
113
  { "-bundle", "-Zbundle" },  \
114
  { "-bundle_loader", "-Zbundle_loader" },  \
115
  { "-weak_reference_mismatches", "-Zweak_reference_mismatches" },  \
116
  { "-dead_strip", "-Zdead_strip" }, \
117
  { "-no_dead_strip_inits_and_terms", "-Zno_dead_strip_inits_and_terms" }, \
118
  { "-dependency-file", "-MF" }, \
119
  { "-dylib_file", "-Zdylib_file" }, \
120
  { "-dynamic", "-Zdynamic" },  \
121
  { "-dynamiclib", "-Zdynamiclib" },  \
122
  { "-exported_symbols_list", "-Zexported_symbols_list" },  \
123
  { "-gfull", "-g -fno-eliminate-unused-debug-symbols" }, \
124
  { "-gused", "-g -feliminate-unused-debug-symbols" }, \
125
  { "-segaddr", "-Zsegaddr" }, \
126
  { "-segs_read_only_addr", "-Zsegs_read_only_addr" }, \
127
  { "-segs_read_write_addr", "-Zsegs_read_write_addr" }, \
128
  { "-seg_addr_table", "-Zseg_addr_table" }, \
129
  { "-seg_addr_table_filename", "-Zfn_seg_addr_table_filename" }, \
130
  { "-fapple-kext", "-fapple-kext -static -Wa,-static" }, \
131
  { "-filelist", "-Xlinker -filelist -Xlinker" },  \
132
  { "-findirect-virtual-calls", "-fapple-kext" }, \
133
  { "-flat_namespace", "-Zflat_namespace" },  \
134
  { "-force_cpusubtype_ALL", "-Zforce_cpusubtype_ALL" },  \
135
  { "-force_flat_namespace", "-Zforce_flat_namespace" },  \
136
  { "-framework", "-Xlinker -framework -Xlinker" },  \
137
  { "-fterminated-vtables", "-fapple-kext" }, \
138
  { "-image_base", "-Zimage_base" },  \
139
  { "-init", "-Zinit" },  \
140
  { "-install_name", "-Zinstall_name" },  \
141
  { "-mkernel", "-mkernel -static -Wa,-static" }, \
142
  { "-multiply_defined_unused", "-Zmultiplydefinedunused" },  \
143
  { "-multiply_defined", "-Zmultiply_defined" },  \
144
  { "-multi_module", "-Zmulti_module" },  \
145
  { "-static", "-static -Wa,-static" },  \
146
  { "-single_module", "-Zsingle_module" },  \
147
  { "-unexported_symbols_list", "-Zunexported_symbols_list" }, \
148
  SUBTARGET_OPTION_TRANSLATE_TABLE
149
 
150
#define SUBSUBTARGET_OVERRIDE_OPTIONS                                   \
151
  do {                                                                  \
152
    darwin_override_options ();                                         \
153
  } while (0)
154
 
155
/* These compiler options take n arguments.  */
156
 
157
#undef  WORD_SWITCH_TAKES_ARG
158
#define WORD_SWITCH_TAKES_ARG(STR)              \
159
  (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 :    \
160
   !strcmp (STR, "Zallowable_client") ? 1 :     \
161
   !strcmp (STR, "arch") ? 1 :                  \
162
   !strcmp (STR, "arch_only") ? 1 :             \
163
   !strcmp (STR, "Zbundle_loader") ? 1 :        \
164
   !strcmp (STR, "client_name") ? 1 :           \
165
   !strcmp (STR, "compatibility_version") ? 1 : \
166
   !strcmp (STR, "current_version") ? 1 :       \
167
   !strcmp (STR, "Zdylib_file") ? 1 :           \
168
   !strcmp (STR, "Zexported_symbols_list") ? 1 : \
169
   !strcmp (STR, "Zimage_base") ? 1 :           \
170
   !strcmp (STR, "Zinit") ? 1 :                 \
171
   !strcmp (STR, "Zinstall_name") ? 1 :         \
172
   !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \
173
   !strcmp (STR, "Zmultiply_defined") ? 1 :     \
174
   !strcmp (STR, "precomp-trustfile") ? 1 :     \
175
   !strcmp (STR, "read_only_relocs") ? 1 :      \
176
   !strcmp (STR, "sectcreate") ? 3 :            \
177
   !strcmp (STR, "sectorder") ? 3 :             \
178
   !strcmp (STR, "Zsegaddr") ? 2 :              \
179
   !strcmp (STR, "Zsegs_read_only_addr") ? 1 :  \
180
   !strcmp (STR, "Zsegs_read_write_addr") ? 1 : \
181
   !strcmp (STR, "Zseg_addr_table") ? 1 :       \
182
   !strcmp (STR, "Zfn_seg_addr_table_filename") ? 1 :\
183
   !strcmp (STR, "seg1addr") ? 1 :              \
184
   !strcmp (STR, "segprot") ? 3 :               \
185
   !strcmp (STR, "sub_library") ? 1 :           \
186
   !strcmp (STR, "sub_umbrella") ? 1 :          \
187
   !strcmp (STR, "umbrella") ? 1 :              \
188
   !strcmp (STR, "undefined") ? 1 :             \
189
   !strcmp (STR, "Zunexported_symbols_list") ? 1 : \
190
   !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \
191
   !strcmp (STR, "pagezero_size") ? 1 :         \
192
   !strcmp (STR, "segs_read_only_addr") ? 1 :   \
193
   !strcmp (STR, "segs_read_write_addr") ? 1 :  \
194
   !strcmp (STR, "sectalign") ? 3 :             \
195
   !strcmp (STR, "sectobjectsymbols") ? 2 :     \
196
   !strcmp (STR, "segcreate") ? 3 :             \
197
   !strcmp (STR, "dylinker_install_name") ? 1 : \
198
   0)
199
 
200
#define SUBTARGET_C_COMMON_OVERRIDE_OPTIONS do {                        \
201
    if (flag_mkernel || flag_apple_kext)                                \
202
      {                                                                 \
203
        if (flag_use_cxa_atexit == 2)                                   \
204
          flag_use_cxa_atexit = 0;                                       \
205
        /* kexts should always be built without the coalesced sections  \
206
           because the kernel loader doesn't grok such sections.  */    \
207
        flag_weak = 0;                                                   \
208
        /* No RTTI in kexts.  */                                        \
209
        flag_rtti = 0;                                                   \
210
      }                                                                 \
211
  } while (0)
212
 
213
/* Machine dependent cpp options.  Don't add more options here, add
214
   them to darwin_cpp_builtins in darwin-c.c.  */
215
 
216
#undef  CPP_SPEC
217
#define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \
218
        " %{pthread:-D_REENTRANT}"
219
 
220
/* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
221
   precomp, libtool, and fat build additions.  Also we
222
   don't specify a second %G after %L because libSystem is
223
   self-contained and doesn't need to link against libgcc.a.  */
224
/* In general, random Darwin linker flags should go into LINK_SPEC
225
   instead of LINK_COMMAND_SPEC.  The command spec is better for
226
   specifying the handling of options understood by generic Unix
227
   linkers, and for positional arguments like libraries.  */
228
#define LINK_COMMAND_SPEC "\
229
%{!fdump=*:%{!fsyntax-only:%{!precomp:%{!c:%{!M:%{!MM:%{!E:%{!S:\
230
    %{!Zdynamiclib:%(linker)}%{Zdynamiclib:/usr/bin/libtool} \
231
    %l %X %{d} %{s} %{t} %{Z} \
232
    %{!Zdynamiclib:%{A} %{e*} %{m} %{N} %{n} %{r} %{u*} %{x} %{z}} \
233
    %{@:-o %f%u.out}%{!@:%{o*}%{!o:-o a.out}} \
234
    %{!A:%{!nostdlib:%{!nostartfiles:%S}}} \
235
    %{L*} %{fopenmp:%:include(libgomp.spec)%(link_gomp)}   \
236
    %(link_libgcc) %o %{fprofile-arcs|fprofile-generate|coverage:-lgcov} \
237
    %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %G %L}} \
238
    %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} }}}}}}}}"
239
 
240
#ifdef TARGET_SYSTEM_ROOT
241
#define LINK_SYSROOT_SPEC \
242
  "%{isysroot*:-syslibroot %*;:-syslibroot " TARGET_SYSTEM_ROOT "}"
243
#else
244
#define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*}"
245
#endif
246
 
247
/* Please keep the random linker options in alphabetical order (modulo
248
   'Z' and 'no' prefixes).  Options that can only go to one of libtool
249
   or ld must be listed twice, under both !Zdynamiclib and
250
   Zdynamiclib, with one of the cases reporting an error.  */
251
/* Note that options taking arguments may appear multiple times on a
252
   command line with different arguments each time, so put a * after
253
   their names so all of them get passed.  */
254
#define LINK_SPEC  \
255
  "%{static}%{!static:-dynamic} \
256
   %{fgnu-runtime:%:replace-outfile(-lobjc -lobjc-gnu)}\
257
   %{!Zdynamiclib: \
258
     %{Zforce_cpusubtype_ALL:-arch %(darwin_arch) -force_cpusubtype_ALL} \
259
     %{!Zforce_cpusubtype_ALL:-arch %(darwin_subarch)} \
260
     %{Zbundle:-bundle} \
261
     %{Zbundle_loader*:-bundle_loader %*} \
262
     %{client_name*} \
263
     %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
264
} \
265
     %{current_version*:%e-current_version only allowed with -dynamiclib} \
266
     %{Zforce_flat_namespace:-force_flat_namespace} \
267
     %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
268
     %{keep_private_externs} \
269
     %{private_bundle} \
270
    } \
271
   %{Zdynamiclib: \
272
     %{Zbundle:%e-bundle not allowed with -dynamiclib} \
273
     %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
274
     %{client_name*:%e-client_name not allowed with -dynamiclib} \
275
     %{compatibility_version*} \
276
     %{current_version*} \
277
     %{Zforce_cpusubtype_ALL:-arch_only %(darwin_arch)} \
278
     %{!Zforce_cpusubtype_ALL: -arch_only %(darwin_subarch)} \
279
     %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
280
     %{Zinstall_name*:-install_name %*} \
281
     %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
282
     %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
283
    } \
284
   %{Zall_load:-all_load}%{Zdynamiclib:%{!Zall_load:-noall_load}} \
285
   %{Zallowable_client*:-allowable_client %*} \
286
   %{Zbind_at_load:-bind_at_load} \
287
   %{Zarch_errors_fatal:-arch_errors_fatal} \
288
   %{Zdead_strip:-dead_strip} \
289
   %{Zno_dead_strip_inits_and_terms:-no_dead_strip_inits_and_terms} \
290
   %{Zdylib_file*:-dylib_file %*} \
291
   %{Zdynamic:-dynamic}\
292
   %{Zexported_symbols_list*:-exported_symbols_list %*} \
293
   %{Zflat_namespace:-flat_namespace} \
294
   %{headerpad_max_install_names*} \
295
   %{Zimage_base*:-image_base %*} \
296
   %{Zinit*:-init %*} \
297
   %{mmacosx-version-min=*:-macosx_version_min %*} \
298
   %{!mmacosx-version-min=*:%{shared-libgcc:-macosx_version_min 10.3}} \
299
   %{nomultidefs} \
300
   %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
301
   %{Zmultiply_defined*:-multiply_defined %*} \
302
   %{!Zmultiply_defined*:%{shared-libgcc: \
303
     %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
304
     %:version-compare(< 10.5 mmacosx-version-min= suppress)}} \
305
   %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
306
   %{prebind} %{noprebind} %{nofixprebinding} %{prebind_all_twolevel_modules} \
307
   %{read_only_relocs} \
308
   %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} \
309
   %{Zsegaddr*:-segaddr %*} \
310
   %{Zsegs_read_only_addr*:-segs_read_only_addr %*} \
311
   %{Zsegs_read_write_addr*:-segs_read_write_addr %*} \
312
   %{Zseg_addr_table*: -seg_addr_table %*} \
313
   %{Zfn_seg_addr_table_filename*:-seg_addr_table_filename %*} \
314
   %{sub_library*} %{sub_umbrella*} \
315
   " LINK_SYSROOT_SPEC " \
316
   %{twolevel_namespace} %{twolevel_namespace_hints} \
317
   %{umbrella*} \
318
   %{undefined*} \
319
   %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
320
   %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
321
   %{!Zweak_reference_mismatches*:-weak_reference_mismatches non-weak} \
322
   %{X} \
323
   %{y*} \
324
   %{w} \
325
   %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit}  \
326
   %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
327
   %{whatsloaded} %{dylinker_install_name*} \
328
   %{dylinker} %{Mach} "
329
 
330
 
331
/* Machine dependent libraries.  */
332
 
333
#define LIB_SPEC "%{!static:-lSystem}"
334
 
335
/* Support -mmacosx-version-min by supplying different (stub) libgcc_s.dylib
336
   libraries to link against, and by not linking against libgcc_s on
337
   earlier-than-10.3.9.
338
 
339
   Note that by default, -lgcc_eh is not linked against!  This is
340
   because in a future version of Darwin the EH frame information may
341
   be in a new format, or the fallback routine might be changed; if
342
   you want to explicitly link against the static version of those
343
   routines, because you know you don't need to unwind through system
344
   libraries, you need to explicitly say -static-libgcc.
345
 
346
   If it is linked against, it has to be before -lgcc, because it may
347
   need symbols from -lgcc.  */
348
#undef REAL_LIBGCC_SPEC
349
#define REAL_LIBGCC_SPEC                                                   \
350
   "%{static-libgcc|static: -lgcc_eh -lgcc;                                \
351
      shared-libgcc|fexceptions|fgnu-runtime:                              \
352
       %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4)        \
353
       %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5)        \
354
       -lgcc;                                                              \
355
      :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
356
       %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_s.10.5)        \
357
       -lgcc}"
358
 
359
/* We specify crt0.o as -lcrt0.o so that ld will search the library path.
360
 
361
   crt3.o provides __cxa_atexit on systems that don't have it.  Since
362
   it's only used with C++, which requires passing -shared-libgcc, key
363
   off that to avoid unnecessarily adding a destructor to every
364
   powerpc program built.  */
365
 
366
#undef  STARTFILE_SPEC
367
#define STARTFILE_SPEC                                                      \
368
  "%{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}}                         \
369
     %{!Zbundle:%{pg:%{static:-lgcrt0.o}                                    \
370
                     %{!static:%{object:-lgcrt0.o}                          \
371
                               %{!object:%{preload:-lgcrt0.o}               \
372
                                 %{!preload:-lgcrt1.o %(darwin_crt2)}}}}    \
373
                %{!pg:%{static:-lcrt0.o}                                    \
374
                      %{!static:%{object:-lcrt0.o}                          \
375
                                %{!object:%{preload:-lcrt0.o}               \
376
                                  %{!preload:-lcrt1.o %(darwin_crt2)}}}}}}  \
377
  %{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
378
 
379
/* The native Darwin linker doesn't necessarily place files in the order
380
   that they're specified on the link line.  Thus, it is pointless
381
   to put anything in ENDFILE_SPEC.  */
382
/* #define ENDFILE_SPEC "" */
383
 
384
/* Default Darwin ASM_SPEC, very simple.  */
385
#define ASM_SPEC "-arch %(darwin_arch) \
386
  %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL}"
387
 
388
/* We use Dbx symbol format.  */
389
 
390
#define DBX_DEBUGGING_INFO 1
391
 
392
/* Also enable Dwarf 2 as an option.  */
393
#define DWARF2_DEBUGGING_INFO
394
#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
395
 
396
#define DEBUG_FRAME_SECTION     "__DWARF,__debug_frame,regular,debug"
397
#define DEBUG_INFO_SECTION      "__DWARF,__debug_info,regular,debug"
398
#define DEBUG_ABBREV_SECTION    "__DWARF,__debug_abbrev,regular,debug"
399
#define DEBUG_ARANGES_SECTION   "__DWARF,__debug_aranges,regular,debug"
400
#define DEBUG_MACINFO_SECTION   "__DWARF,__debug_macinfo,regular,debug"
401
#define DEBUG_LINE_SECTION      "__DWARF,__debug_line,regular,debug"
402
#define DEBUG_LOC_SECTION       "__DWARF,__debug_loc,regular,debug"
403
#define DEBUG_PUBNAMES_SECTION  "__DWARF,__debug_pubnames,regular,debug"
404
#define DEBUG_STR_SECTION       "__DWARF,__debug_str,regular,debug"
405
#define DEBUG_RANGES_SECTION    "__DWARF,__debug_ranges,regular,debug"
406
 
407
/* When generating stabs debugging, use N_BINCL entries.  */
408
 
409
#define DBX_USE_BINCL
410
 
411
/* There is no limit to the length of stabs strings.  */
412
 
413
#define DBX_CONTIN_LENGTH 0
414
 
415
/* gdb needs a null N_SO at the end of each file for scattered loading.  */
416
 
417
#define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
418
 
419
/* GCC's definition of 'one_only' is the same as its definition of 'weak'.  */
420
#define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
421
 
422
/* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
423
   sections.  machopic_select_section ensures that weak variables go in
424
   coalesced sections.  Weak aliases (or any other kind of aliases) are
425
   not supported.  Weak symbols that aren't visible outside the .s file
426
   are not supported.  */
427
#define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS)                        \
428
  do {                                                                  \
429
    if (ALIAS)                                                          \
430
      {                                                                 \
431
        warning (0, "alias definitions not supported in Mach-O; ignored");      \
432
        break;                                                          \
433
      }                                                                 \
434
                                                                        \
435
    if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL))                   \
436
      targetm.asm_out.globalize_label (FILE, NAME);                     \
437
    if (DECL_EXTERNAL (DECL))                                           \
438
      fputs ("\t.weak_reference ", FILE);                               \
439
    else if (! lookup_attribute ("weak", DECL_ATTRIBUTES (DECL))        \
440
        && lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL)))    \
441
      break;                                                            \
442
    else if (TREE_PUBLIC (DECL))                                        \
443
      fputs ("\t.weak_definition ", FILE);                              \
444
    else                                                                \
445
      break;                                                            \
446
    assemble_name (FILE, NAME);                                         \
447
    fputc ('\n', FILE);                                                 \
448
  } while (0)
449
 
450
/* Darwin has the pthread routines in libSystem, which every program
451
   links to, so there's no need for weak-ness for that.  */
452
#define GTHREAD_USE_WEAK 0
453
 
454
/* The Darwin linker imposes two limitations on common symbols: they
455
   can't have hidden visibility, and they can't appear in dylibs.  As
456
   a consequence, we should never use common symbols to represent
457
   vague linkage. */
458
#undef USE_COMMON_FOR_ONE_ONLY
459
#define USE_COMMON_FOR_ONE_ONLY 0
460
 
461
/* The Darwin linker doesn't want coalesced symbols to appear in
462
   a static archive's table of contents. */
463
#undef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
464
#define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 1
465
 
466
/* On Darwin, we don't (at the time of writing) have linkonce sections
467
   with names, so it's safe to make the class data not comdat.  */
468
#define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
469
 
470
/* We make exception information linkonce. */
471
#undef TARGET_USES_WEAK_UNWIND_INFO
472
#define TARGET_USES_WEAK_UNWIND_INFO 1
473
 
474
/* We need to use a nonlocal label for the start of an EH frame: the
475
   Darwin linker requires that a coalesced section start with a label.
476
   Unfortunately, it also requires that 'debug' sections don't contain
477
   labels.  */
478
#undef FRAME_BEGIN_LABEL
479
#define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
480
 
481
/* Emit a label for the FDE corresponding to DECL.  EMPTY means
482
   emit a label for an empty FDE. */
483
#define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
484
 
485
/* Emit a label to separate the exception table.  */
486
#define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
487
 
488
/* Our profiling scheme doesn't LP labels and counter words.  */
489
 
490
#define NO_PROFILE_COUNTERS     1
491
 
492
#undef  INIT_SECTION_ASM_OP
493
#define INIT_SECTION_ASM_OP
494
 
495
#undef  INVOKE__main
496
 
497
#define TARGET_ASM_CONSTRUCTOR  machopic_asm_out_constructor
498
#define TARGET_ASM_DESTRUCTOR   machopic_asm_out_destructor
499
 
500
/* Always prefix with an underscore.  */
501
 
502
#define USER_LABEL_PREFIX "_"
503
 
504
/* Don't output a .file directive.  That is only used by the assembler for
505
   error reporting.  */
506
#undef  TARGET_ASM_FILE_START_FILE_DIRECTIVE
507
#define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
508
 
509
#undef  TARGET_ASM_FILE_END
510
#define TARGET_ASM_FILE_END darwin_file_end
511
 
512
#define ASM_OUTPUT_SKIP(FILE,SIZE)  \
513
  fprintf (FILE, "\t.space "HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
514
 
515
/* Give ObjC methods pretty symbol names.  */
516
 
517
#undef  OBJC_GEN_METHOD_LABEL
518
#define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
519
  do { if (CAT_NAME)                                                    \
520
         sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+',          \
521
                  (CLASS_NAME), (CAT_NAME), (SEL_NAME));                \
522
       else                                                             \
523
         sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+',              \
524
                  (CLASS_NAME), (SEL_NAME));                            \
525
     } while (0)
526
 
527
/* The RTTI data (e.g., __ti4name) is common and public (and static),
528
   but it does need to be referenced via indirect PIC data pointers.
529
   The machopic_define_symbol calls are telling the machopic subsystem
530
   that the name *is* defined in this module, so it doesn't need to
531
   make them indirect.  */
532
 
533
#undef ASM_DECLARE_OBJECT_NAME
534
#define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
535
  do {                                                                  \
536
    const char *xname = NAME;                                           \
537
    if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
538
      xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
539
    if (! DECL_WEAK (DECL)                                              \
540
        && ((TREE_STATIC (DECL)                                         \
541
             && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
542
            || DECL_INITIAL (DECL)))                                    \
543
        machopic_define_symbol (DECL_RTL (DECL));                       \
544
    if ((TREE_STATIC (DECL)                                             \
545
         && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
546
        || DECL_INITIAL (DECL))                                         \
547
      (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
548
    ASM_OUTPUT_LABEL (FILE, xname);                                     \
549
    /* Darwin doesn't support zero-size objects, so give them a         \
550
       byte.  */                                                        \
551
    if (tree_low_cst (DECL_SIZE_UNIT (DECL), 1) == 0)                   \
552
      assemble_zeros (1);                                               \
553
  } while (0)
554
 
555
#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
556
  do {                                                                  \
557
    const char *xname = NAME;                                           \
558
    if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF)             \
559
      xname = IDENTIFIER_POINTER (DECL_NAME (DECL));                    \
560
    if (! DECL_WEAK (DECL)                                              \
561
        && ((TREE_STATIC (DECL)                                         \
562
             && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))           \
563
            || DECL_INITIAL (DECL)))                                    \
564
        machopic_define_symbol (DECL_RTL (DECL));                       \
565
    if ((TREE_STATIC (DECL)                                             \
566
         && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
567
        || DECL_INITIAL (DECL))                                         \
568
      (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false);   \
569
    ASM_OUTPUT_LABEL (FILE, xname);                                     \
570
  } while (0)
571
 
572
#define ASM_DECLARE_CONSTANT_NAME(FILE, NAME, EXP, SIZE)        \
573
  do {                                                          \
574
    ASM_OUTPUT_LABEL (FILE, NAME);                              \
575
    /* Darwin doesn't support zero-size objects, so give them a \
576
       byte.  */                                                \
577
    if ((SIZE) == 0)                                            \
578
      assemble_zeros (1);                                       \
579
  } while (0)
580
 
581
/* Wrap new method names in quotes so the assembler doesn't gag.
582
   Make Objective-C internal symbols local.  */
583
 
584
#undef  ASM_OUTPUT_LABELREF
585
#define ASM_OUTPUT_LABELREF(FILE,NAME)                                       \
586
  do {                                                                       \
587
       const char *xname = (NAME);                                           \
588
       if (! strcmp (xname, "<pic base>"))                                   \
589
         machopic_output_function_base_name(FILE);                           \
590
       else if (xname[0] == '&' || xname[0] == '*')                          \
591
         {                                                                   \
592
           int len = strlen (xname);                                         \
593
           if (len > 6 && !strcmp ("$stub", xname + len - 5))                \
594
             machopic_validate_stub_or_non_lazy_ptr (xname);                 \
595
           else if (len > 7 && !strcmp ("$stub\"", xname + len - 6))         \
596
             machopic_validate_stub_or_non_lazy_ptr (xname);                 \
597
           else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
598
             machopic_validate_stub_or_non_lazy_ptr (xname);                 \
599
           else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
600
             machopic_validate_stub_or_non_lazy_ptr (xname);                 \
601
           if (xname[1] != '"' && name_needs_quotes (&xname[1]))             \
602
             fprintf (FILE, "\"%s\"", &xname[1]);                            \
603
           else                                                              \
604
             fputs (&xname[1], FILE);                                        \
605
         }                                                                   \
606
       else if (xname[0] == '+' || xname[0] == '-')                            \
607
         fprintf (FILE, "\"%s\"", xname);                                    \
608
       else if (!strncmp (xname, "_OBJC_", 6))                               \
609
         fprintf (FILE, "L%s", xname);                                       \
610
       else if (!strncmp (xname, ".objc_class_name_", 17))                   \
611
         fprintf (FILE, "%s", xname);                                        \
612
       else if (xname[0] != '"' && name_needs_quotes (xname))                 \
613
         fprintf (FILE, "\"%s\"", xname);                                    \
614
       else                                                                  \
615
         asm_fprintf (FILE, "%U%s", xname);                                  \
616
  } while (0)
617
 
618
/* Output before executable code.  */
619
#undef TEXT_SECTION_ASM_OP
620
#define TEXT_SECTION_ASM_OP "\t.text"
621
 
622
/* Output before writable data.  */
623
 
624
#undef DATA_SECTION_ASM_OP
625
#define DATA_SECTION_ASM_OP "\t.data"
626
 
627
#undef  ALIGN_ASM_OP
628
#define ALIGN_ASM_OP            ".align"
629
 
630
#undef  ASM_OUTPUT_ALIGN
631
#define ASM_OUTPUT_ALIGN(FILE,LOG)      \
632
  if ((LOG) != 0)                        \
633
    fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG))
634
 
635
/* Ensure correct alignment of bss data.  */
636
 
637
#undef  ASM_OUTPUT_ALIGNED_DECL_LOCAL
638
#define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN)    \
639
  do {                                                                  \
640
    unsigned HOST_WIDE_INT _new_size = SIZE;                            \
641
    fputs (".lcomm ", (FILE));                                          \
642
    assemble_name ((FILE), (NAME));                                     \
643
    if (_new_size == 0) _new_size = 1;                                   \
644
    fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", _new_size, \
645
             floor_log2 ((ALIGN) / BITS_PER_UNIT));                     \
646
    if ((DECL) && ((TREE_STATIC (DECL)                                  \
647
         && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL)))               \
648
        || DECL_INITIAL (DECL)))                                        \
649
      {                                                                 \
650
        (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
651
        machopic_define_symbol (DECL_RTL (DECL));                       \
652
      }                                                                 \
653
  } while (0)
654
 
655
/* The maximum alignment which the object file format can support in
656
   bits.  For Mach-O, this is 2^15 bytes.  */
657
 
658
#undef  MAX_OFILE_ALIGNMENT
659
#define MAX_OFILE_ALIGNMENT (0x8000 * 8)
660
 
661
/* Declare the section variables.  */
662
#ifndef USED_FOR_TARGET
663
enum darwin_section_enum {
664
#define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
665
#include "darwin-sections.def"
666
#undef DEF_SECTION
667
  NUM_DARWIN_SECTIONS
668
};
669
extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
670
#endif
671
 
672
#undef  TARGET_ASM_SELECT_SECTION
673
#define TARGET_ASM_SELECT_SECTION machopic_select_section
674
#define USE_SELECT_SECTION_FOR_FUNCTIONS
675
 
676
#undef  TARGET_ASM_SELECT_RTX_SECTION
677
#define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
678
#undef  TARGET_ASM_UNIQUE_SECTION
679
#define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
680
#undef  TARGET_ASM_FUNCTION_RODATA_SECTION
681
#define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
682
#undef  TARGET_ASM_RELOC_RW_MASK
683
#define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
684
 
685
 
686
#define ASM_DECLARE_UNRESOLVED_REFERENCE(FILE,NAME)                     \
687
    do {                                                                \
688
         if (FILE) {                                                    \
689
           if (MACHOPIC_INDIRECT)                                       \
690
             fprintf (FILE, "\t.lazy_reference ");                      \
691
           else                                                         \
692
             fprintf (FILE, "\t.reference ");                           \
693
           assemble_name (FILE, NAME);                                  \
694
           fprintf (FILE, "\n");                                        \
695
         }                                                              \
696
       } while (0)
697
 
698
#define ASM_DECLARE_CLASS_REFERENCE(FILE,NAME)                          \
699
    do {                                                                \
700
         if (FILE) {                                                    \
701
           fprintf (FILE, "\t");                                        \
702
           assemble_name (FILE, NAME);                                  \
703
           fprintf (FILE, "=0\n");                                      \
704
           (*targetm.asm_out.globalize_label) (FILE, NAME);             \
705
         }                                                              \
706
       } while (0)
707
 
708
/* Globalizing directive for a label.  */
709
#define GLOBAL_ASM_OP ".globl "
710
#define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
711
 
712
/* Emit an assembler directive to set visibility for a symbol.  Used
713
   to support visibility attribute and Darwin's private extern
714
   feature.  */
715
#undef TARGET_ASM_ASSEMBLE_VISIBILITY
716
#define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
717
 
718
/* Extra attributes for Darwin.  */
719
#define SUBTARGET_ATTRIBUTE_TABLE                                            \
720
  /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
721
  { "apple_kext_compatibility", 0, 0, false, true, false,              \
722
    darwin_handle_kext_attribute },                                          \
723
  { "weak_import", 0, 0, true, false, false,                                   \
724
    darwin_handle_weak_import_attribute }
725
 
726
#undef ASM_GENERATE_INTERNAL_LABEL
727
#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
728
  sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
729
 
730
#undef TARGET_ASM_MARK_DECL_PRESERVED
731
#define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
732
 
733
/* Set on a symbol with SYMBOL_FLAG_FUNCTION or
734
   MACHO_SYMBOL_FLAG_VARIABLE to indicate that the function or
735
   variable has been defined in this translation unit.
736
   When porting Mach-O to new architectures you need to make
737
   sure these aren't clobbered by the backend.  */
738
 
739
#define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_MACH_DEP)
740
#define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_MACH_DEP) << 1)
741
 
742
/* Set on a symbol to indicate when fix-and-continue style code
743
   generation is being used and the symbol refers to a static symbol
744
   that should be rebound from new instances of a translation unit to
745
   the original instance of the data.  */
746
 
747
#define MACHO_SYMBOL_STATIC ((SYMBOL_FLAG_MACH_DEP) << 2)
748
 
749
/* Symbolic names for various things we might know about a symbol.  */
750
 
751
enum machopic_addr_class {
752
  MACHOPIC_UNDEFINED,
753
  MACHOPIC_DEFINED_DATA,
754
  MACHOPIC_UNDEFINED_DATA,
755
  MACHOPIC_DEFINED_FUNCTION,
756
  MACHOPIC_UNDEFINED_FUNCTION
757
};
758
 
759
/* Macros defining the various PIC cases.  */
760
 
761
#define MACHO_DYNAMIC_NO_PIC_P  (TARGET_DYNAMIC_NO_PIC)
762
#define MACHOPIC_INDIRECT       (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
763
#define MACHOPIC_JUST_INDIRECT  (MACHO_DYNAMIC_NO_PIC_P)
764
#define MACHOPIC_PURE           (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
765
 
766
#undef TARGET_ENCODE_SECTION_INFO
767
#define TARGET_ENCODE_SECTION_INFO  darwin_encode_section_info
768
#undef TARGET_STRIP_NAME_ENCODING
769
#define TARGET_STRIP_NAME_ENCODING  default_strip_name_encoding
770
 
771
#define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH)          \
772
  do {                                                          \
773
    const char *const stub_ = (STUB);                           \
774
    char *buffer_ = (BUF);                                      \
775
    strcpy (buffer_, stub_);                                    \
776
    if (stub_[0] == '"')                                 \
777
      {                                                         \
778
        strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\"");      \
779
      }                                                         \
780
    else                                                        \
781
      {                                                         \
782
        strcpy (buffer_ + (STUB_LENGTH), "_binder");            \
783
      }                                                         \
784
  } while (0)
785
 
786
#define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)    \
787
  do {                                                          \
788
    const char *const symbol_ = (SYMBOL);                       \
789
    char *buffer_ = (BUF);                                      \
790
    if (name_needs_quotes (symbol_) && symbol_[0] != '"')        \
791
      {                                                         \
792
          sprintf (buffer_, "\"%s\"", symbol_);                 \
793
      }                                                         \
794
    else                                                        \
795
      {                                                         \
796
        strcpy (buffer_, symbol_);                              \
797
      }                                                         \
798
  } while (0)
799
 
800
/* Given a symbol name string, create the lazy pointer version
801
   of the symbol name.  */
802
 
803
#define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH)  \
804
  do {                                                          \
805
    const char *symbol_ = (SYMBOL);                             \
806
    char *buffer_ = (BUF);                                      \
807
    if (symbol_[0] == '"')                                       \
808
      {                                                         \
809
        strcpy (buffer_, "\"L");                                \
810
        strcpy (buffer_ + 2, symbol_ + 1);                      \
811
        strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\"");      \
812
      }                                                         \
813
    else if (name_needs_quotes (symbol_))                       \
814
      {                                                         \
815
        strcpy (buffer_, "\"L");                                \
816
        strcpy (buffer_ + 2, symbol_);                          \
817
        strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\"");  \
818
      }                                                         \
819
    else                                                        \
820
      {                                                         \
821
        strcpy (buffer_, "L");                                  \
822
        strcpy (buffer_ + 1, symbol_);                          \
823
        strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr");    \
824
      }                                                         \
825
  } while (0)
826
 
827
#define EH_FRAME_SECTION_NAME   "__TEXT"
828
#define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
829
 
830
/* Java runtime class list.  */
831
#define JCR_SECTION_NAME "__DATA,jcr,regular,no_dead_strip"
832
 
833
#undef ASM_PREFERRED_EH_DATA_FORMAT
834
#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  \
835
  (((CODE) == 2 && (GLOBAL) == 1) \
836
   ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
837
     ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
838
 
839
#define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2)  \
840
  darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2)
841
 
842
#define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,BASE)  \
843
  darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, BASE)
844
 
845
#define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE)     \
846
      if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) {                            \
847
        darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR);                                     \
848
        goto DONE;                                                                      \
849
      }
850
 
851
/* Experimentally, putting jump tables in text is faster on SPEC.
852
   Also this is needed for correctness for coalesced functions.  */
853
 
854
#ifndef JUMP_TABLES_IN_TEXT_SECTION
855
#define JUMP_TABLES_IN_TEXT_SECTION 1
856
#endif
857
 
858
#define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
859
 
860
#define TARGET_ASM_INIT_SECTIONS darwin_init_sections
861
#undef TARGET_ASM_NAMED_SECTION
862
#define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
863
 
864
/* Handle pragma weak and pragma pack.  */
865
#define HANDLE_SYSV_PRAGMA 1
866
 
867
#define HANDLE_PRAGMA_PACK_PUSH_POP 1
868
 
869
#define DARWIN_REGISTER_TARGET_PRAGMAS()                        \
870
  do {                                                          \
871
    c_register_pragma (0, "mark", darwin_pragma_ignore); \
872
    c_register_pragma (0, "options", darwin_pragma_options);     \
873
    c_register_pragma (0, "segment", darwin_pragma_ignore);      \
874
    c_register_pragma (0, "unused", darwin_pragma_unused);       \
875
    c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
876
  } while (0)
877
 
878
#undef ASM_APP_ON
879
#define ASM_APP_ON ""
880
#undef ASM_APP_OFF
881
#define ASM_APP_OFF ""
882
 
883
void darwin_register_frameworks (const char *, const char *, int);
884
void darwin_register_objc_includes (const char *, const char *, int);
885
#define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
886
#define TARGET_EXTRA_INCLUDES darwin_register_frameworks
887
 
888
void add_framework_path (char *);
889
#define TARGET_OPTF add_framework_path
890
 
891
#define TARGET_POSIX_IO
892
 
893
/* All new versions of Darwin have C99 functions.  */
894
 
895
#define TARGET_C99_FUNCTIONS 1
896
 
897
#define WINT_TYPE "int"
898
 
899
/* Every program on darwin links against libSystem which contains the pthread
900
   routines, so there's no need to explicitly call out when doing threaded
901
   work.  */
902
 
903
#undef GOMP_SELF_SPECS
904
#define GOMP_SELF_SPECS ""
905
 
906
/* Darwin can't support anchors until we can cope with the adjustments
907
   to size that ASM_DECLARE_OBJECT_NAME and ASM_DECLARE_CONSTANT_NAME
908
   when outputting members of an anchor block and the linker can be
909
   taught to keep them together or we find some other suitable
910
   code-gen technique.  */
911
 
912
#if 0
913
#define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor
914
#else
915
#define TARGET_ASM_OUTPUT_ANCHOR NULL
916
#endif
917
 
918
/* Attempt to turn on execute permission for the stack.  This may be
919
    used by INITIALIZE_TRAMPOLINE of the target needs it (that is,
920
    if the target machine can change execute permissions on a page).
921
 
922
    There is no way to query the execute permission of the stack, so
923
    we always issue the mprotect() call.
924
 
925
    Unfortunately it is not possible to make this namespace-clean.
926
 
927
    Also note that no errors should be emitted by this code; it is
928
    considered dangerous for library calls to send messages to
929
    stdout/stderr.  */
930
 
931
#define ENABLE_EXECUTE_STACK                                            \
932
extern void __enable_execute_stack (void *);                            \
933
void                                                                    \
934
__enable_execute_stack (void *addr)                                     \
935
{                                                                       \
936
   extern int mprotect (void *, size_t, int);                           \
937
   extern int getpagesize (void);                                       \
938
   static int size;                                                     \
939
   static long mask;                                                    \
940
                                                                        \
941
   char *page, *end;                                                    \
942
                                                                        \
943
   if (size == 0)                                                       \
944
     {                                                                  \
945
       size = getpagesize();                                            \
946
       mask = ~((long) size - 1);                                       \
947
     }                                                                  \
948
                                                                        \
949
   page = (char *) (((long) addr) & mask);                              \
950
   end  = (char *) ((((long) (addr + (TARGET_64BIT ? 48 : 40))) & mask) + size); \
951
                                                                        \
952
   /* 7 == PROT_READ | PROT_WRITE | PROT_EXEC */                        \
953
   (void) mprotect (page, end - page, 7);                               \
954
}
955
 
956
/* For Apple KEXTs, we make the constructors return this to match gcc
957
   2.95.  */
958
#define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
959
extern int flag_mkernel;
960
extern int flag_apple_kext;
961
#define TARGET_KEXTABI flag_apple_kext
962
 
963
#endif /* CONFIG_DARWIN_H */

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