1 /* Target definitions for Darwin (Mac OS X) systems.
2 Copyright (C) 1989-2023 Free Software Foundation, Inc.
3 Contributed by Apple Computer Inc.
4
5 This file is part of GCC.
6
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)
10 any later version.
11
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.
16
17 Under Section 7 of GPL version 3, you are granted additional
18 permissions described in the GCC Runtime Library Exception, version
19 3.1, as published by the Free Software Foundation.
20
21 You should have received a copy of the GNU General Public License and
22 a copy of the GCC Runtime Library Exception along with this program;
23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 <http://www.gnu.org/licenses/>. */
25
26 #ifndef CONFIG_DARWIN_H
27 #define CONFIG_DARWIN_H
28
29 /* The definitions in this file are common to all processor types
30 running Darwin, which is the kernel for Mac OS X. Darwin is
31 basically a BSD user layer laid over a Mach kernel, then evolved
32 for many years (at NeXT) in parallel with other Unix systems. So
33 while the runtime is a somewhat idiosyncratic Mach-based thing,
34 other definitions look like they would for a BSD variant. */
35
36 /* Although NeXT ran on many different architectures, as of Jan 2001
37 the only supported Darwin targets are PowerPC and x86. */
38
39 /* One of Darwin's NeXT legacies is the Mach-O format, which is partly
40 like a.out and partly like COFF, with additional features like
41 multi-architecture binary support. */
42
43 #define DARWIN_X86 0
44 #define DARWIN_PPC 0
45
46 #define OBJECT_FORMAT_MACHO 1
47
48 /* Suppress g++ attempt to link in the math library automatically. */
49 #define MATH_LIBRARY ""
50
51 /* We have atexit. */
52
53 #define HAVE_ATEXIT
54
55 /* Define an empty body for the function do_global_dtors() in libgcc2.c. */
56
57 #define DO_GLOBAL_DTORS_BODY
58
59 /* Register static destructors to run from __cxa_atexit instead of putting
60 them into a .mod_term_funcs section. */
61
62 #define TARGET_DTORS_FROM_CXA_ATEXIT true
63
64 /* The string value for __SIZE_TYPE__. */
65
66 #ifndef SIZE_TYPE
67 #define SIZE_TYPE "long unsigned int"
68 #endif
69
70 /* Type used for ptrdiff_t, as a string used in a declaration. */
71
72 #undef PTRDIFF_TYPE
73 #define PTRDIFF_TYPE "int"
74
75 /* wchar_t is int. */
76
77 #undef WCHAR_TYPE
78 #define WCHAR_TYPE "int"
79 #undef WCHAR_TYPE_SIZE
80 #define WCHAR_TYPE_SIZE 32
81
82 #define INT8_TYPE "signed char"
83 #define INT16_TYPE "short int"
84 #define INT32_TYPE "int"
85 #define INT64_TYPE "long long int"
86 #define UINT8_TYPE "unsigned char"
87 #define UINT16_TYPE "short unsigned int"
88 #define UINT32_TYPE "unsigned int"
89 #define UINT64_TYPE "long long unsigned int"
90
91 #define INT_LEAST8_TYPE "signed char"
92 #define INT_LEAST16_TYPE "short int"
93 #define INT_LEAST32_TYPE "int"
94 #define INT_LEAST64_TYPE "long long int"
95 #define UINT_LEAST8_TYPE "unsigned char"
96 #define UINT_LEAST16_TYPE "short unsigned int"
97 #define UINT_LEAST32_TYPE "unsigned int"
98 #define UINT_LEAST64_TYPE "long long unsigned int"
99
100 #define INT_FAST8_TYPE "signed char"
101 #define INT_FAST16_TYPE "short int"
102 #define INT_FAST32_TYPE "int"
103 #define INT_FAST64_TYPE "long long int"
104 #define UINT_FAST8_TYPE "unsigned char"
105 #define UINT_FAST16_TYPE "short unsigned int"
106 #define UINT_FAST32_TYPE "unsigned int"
107 #define UINT_FAST64_TYPE "long long unsigned int"
108
109 #define INTPTR_TYPE "long int"
110 #define UINTPTR_TYPE "long unsigned int"
111
112 #define SIG_ATOMIC_TYPE "int"
113
114 /* Default to using the NeXT-style runtime, since that's what is
115 pre-installed on Darwin systems. */
116
117 #define NEXT_OBJC_RUNTIME 100508
118
119 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
120 we want to retain compatibility with older gcc versions. */
121
122 #undef DEFAULT_PCC_STRUCT_RETURN
123 #define DEFAULT_PCC_STRUCT_RETURN 0
124
125 /* True if pragma ms_struct is in effect. */
126 extern GTY(()) int darwin_ms_struct;
127
128 /* Darwin has a user convenience feature where some linker options are exposed
129 at the driver level (so one can type "-all_load" instead of "-Wl,-all_load"
130 or "-Xlinker -all_load"). We retain this, but now these options are all
131 marked as 'Driver' and we process them as early as possible so that they
132 get allocated to the right toolchain command. There are a couple of special
133 cases where these driver opts are used multiple times, or to control
134 operations on more than one command (e.g. dynamiclib). These are handled
135 specially and we then add %<xxxx specs for the commands that _don't_ need
136 them. NOTE: the order of 'shared' and 'dynamiclib' is significant, hence
137 they are placed out of alphabetical order at the start. Likewise, we keep
138 a couple of cases where a negative option originally appeared after the
139 positive alternate, potentially overriding it.
140 When we report an error with %e, it seems necessary to strip the option
141 before doing so, otherwise it survives to the cc1 command line (%e doesn't
142 appear to abort the program before this).
143 Right now there's no mechanism to split up the "variable portion" (%*) of
144 the matched spec string, so where we have some driver specs that take 2
145 or 3 arguments, these cannot be processed here, but are deferred until the
146 LINK_SPEC, where they are copied verbatim. */
147
148 #undef SUBTARGET_DRIVER_SELF_SPECS
149 #define SUBTARGET_DRIVER_SELF_SPECS \
150 "%{shared:%{!dynamiclib:-dynamiclib}} %<shared", \
151 "%{static:%{dynamic|dynamiclib:%econflicting code generation switches}}",\
152 "%{dynamiclib:-Xlinker -dylib \
153 %{allowable_client*:-Xlinker -allowable_client -Xlinker %*} \
154 %<allowable_client* \
155 %{bundle_loader*: %<bundle_loader* \
156 %e-bundle_loader not allowed with -dynamiclib} \
157 %{client_name*: %<client_name* \
158 %e-client_name not allowed with -dynamiclib} \
159 %{compatibility_version*:\
160 -Xlinker -dylib_compatibility_version -Xlinker %*} \
161 %<compatibility_version* \
162 %{current_version*:-Xlinker -dylib_current_version -Xlinker %*} \
163 %<current_version* \
164 %{install_name*:-Xlinker -dylib_install_name -Xlinker %* } \
165 %<install_name* \
166 %{keep_private_externs: %<keep_private_externs \
167 %e-keep_private_externs not allowed with -dynamiclib} \
168 %{private_bundle: %<private_bundle \
169 %e-private_bundle not allowed with -dynamiclib} \
170 }", \
171 "%{!dynamiclib: \
172 %{bundle_loader*:-Xlinker -bundle_loader -Xlinker %*} \
173 %<bundle_loader* \
174 %{client_name*:-Xlinker -client_name -Xlinker %*} \
175 %<client_name* \
176 %{compatibility_version*: %<compatibility_version* \
177 %e-compatibility_version only allowed with -dynamiclib} \
178 %{current_version*: %<current_version* \
179 %e-current_version only allowed with -dynamiclib} \
180 %{install_name*: %<install_name* \
181 %e-install_name only allowed with -dynamiclib} \
182 %{keep_private_externs:-Xlinker -keep_private_externs} \
183 %<keep_private_externs \
184 %{private_bundle:-Xlinker -private_bundle} \
185 %<private_bundle \
186 }", \
187 "%{all_load:-Xlinker -all_load} %<all_load", \
188 "%{arch_errors_fatal:-Xlinker -arch_errors_fatal} \
189 %<arch_errors_fatal", \
190 "%{bind_at_load:-Xlinker -bind_at_load} %<bind_at_load", \
191 "%{bundle:%{!dynamiclib:-Xlinker -bundle; \
192 :%e-bundle not allowed with -dynamiclib}}", \
193 "%{dead_strip:-Xlinker -dead_strip} %<dead_strip", \
194 "%{dylib_file*:-Xlinker -dylib_file -Xlinker %*} %<dylib_file*", \
195 "%{dylinker:-Xlinker -dylinker} %<dylinker", \
196 "%{dylinker_install_name*:-Xlinker -dylinker_install_name -Xlinker %*}\
197 %<dylinker_install_name*", \
198 "%{exported_symbols_list*:-Xlinker -exported_symbols_list -Xlinker %*}\
199 %<exported_symbols_list", \
200 "%{findirect-virtual-calls: -fapple-kext} %<findirect-virtual-calls", \
201 "%{fterminated-vtables: -fapple-kext} %<fterminated-vtables", \
202 "%{fapple-kext|mkernel:-static}", \
203 "%{filelist*:-Xlinker -filelist -Xlinker %*} %<filelist*", \
204 "%{flat_namespace:-Xlinker -flat_namespace} %<flat_namespace", \
205 "%{force_cpusubtype_ALL:-Xassembler -force_cpusubtype_ALL} ", \
206 "%{force_flat_namespace: \
207 %{!dynamiclib:-Xlinker -force_flat_namespace; \
208 :%e-force_flat_namespace not allowed with -dynamiclib}} \
209 %<force_flat_namespace", \
210 "%{framework*:-Xlinker -framework -Xlinker %*} %<framework*", \
211 "%{gfull:-g -fno-eliminate-unused-debug-symbols} %<gfull", \
212 "%{gused:-g -feliminate-unused-debug-symbols} %<gused", \
213 "%{gsplit-dwarf:%ngsplit-dwarf is not supported on this platform} \
214 %<gsplit-dwarf", \
215 "%{headerpad_max_install_names:-Xlinker -headerpad_max_install_names}\
216 %<headerpad_max_install_names", \
217 "%{image_base*:-Xlinker -image_base -Xlinker %*} %<image_base*", \
218 "%{init*:-Xlinker -init -Xlinker %*} %<init*", \
219 "%{multi_module:-Xlinker -multi_module} %<multi_module", \
220 "%{multiply_defined*:-Xlinker -multiply_defined -Xlinker %*} ", \
221 "%{multiplydefinedunused*:\
222 -Xlinker -multiply_defined_unused -Xlinker %*} \
223 %<multiplydefinedunused* ", \
224 "%{no_dead_strip_inits_and_terms:\
225 -Xlinker -no_dead_strip_inits_and_terms} \
226 %<no_dead_strip_inits_and_terms", \
227 "%{nofixprebinding:-Xlinker -nofixprebinding} %<nofixprebinding", \
228 "%{nomultidefs:-Xlinker -nomultidefs} %<nomultidefs", \
229 "%{pagezero_size*:-Xlinker -pagezero_size -Xlinker %*} \
230 %<pagezero_size", \
231 "%{prebind:-Xlinker -prebind} %<prebind", \
232 "%{noprebind:-Xlinker -noprebind} %<noprebind", \
233 "%{prebind_all_twolevel_modules:\
234 -Xlinker -prebind_all_twolevel_modules} \
235 %<prebind_all_twolevel_modules", \
236 "%{preload:-Xlinker -preload} %<preload", \
237 "%{read_only_relocs*:-Xlinker -read_only_relocs -Xlinker %*} \
238 %<read_only_relocs*", \
239 "%{rpath*: -Xlinker -rpath -Xlinker %*}", \
240 "%{seg_addr_table_filename*: \
241 -Xlinker -seg_addr_table_filename -Xlinker %*} \
242 %<seg_addr_table_filename*", \
243 "%{seg_addr_table*:-Xlinker -seg_addr_table -Xlinker %*} \
244 %<seg_addr_table*", \
245 "%{seg1addr*:-Xlinker -image_base -Xlinker %*} %<seg1addr*", \
246 "%{seglinkedit:-Xlinker -seglinkedit} %<seglinkedit", \
247 "%{noseglinkedit:-Xlinker -noseglinkedit} %<noseglinkedit", \
248 "%{segs_read_only_addr*:-Xlinker -segs_read_only_addr -Xlinker %*} \
249 %<segs_read_only_addr*", \
250 "%{segs_read_write_addr*:-Xlinker -segs_read_write_addr -Xlinker %*} \
251 %<segs_read_write_addr*", \
252 "%{single_module:-Xlinker -single_module} %<single_module", \
253 "%{sub_library*:-Xlinker -sub_library -Xlinker %*} %<sub_library*", \
254 "%{sub_umbrella*:-Xlinker -sub_umbrella -Xlinker %*} %<sub_umbrella*",\
255 "%{twolevel_namespace:-Xlinker -twolevel_namespace} \
256 %<twolevel_namespace", \
257 "%{twolevel_namespace_hints:-Xlinker -twolevel_namespace_hints} \
258 %<twolevel_namespace_hints", \
259 "%{umbrella*:-Xlinker -umbrella -Xlinker %*} %<umbrella*", \
260 "%{undefined*:-Xlinker -undefined -Xlinker %*} %<undefined*", \
261 "%{unexported_symbols_list*:\
262 -Xlinker -unexported_symbols_list -Xlinker %*} \
263 %<unexported_symbols_list*", \
264 "%{weak_reference_mismatches*:\
265 -Xlinker -weak_reference_mismatches -Xlinker %*} \
266 %<weak_reference_mismatches*", \
267 "%{whyload:-Xlinker -whyload} %<whyload", \
268 "%{whatsloaded:-Xlinker -whatsloaded} %<whatsloaded", \
269 "%{w:-Xlinker -w}", \
270 "%<y*", \
271 "%<Mach "
272
273 #if LD64_HAS_EXPORT_DYNAMIC
274 #define DARWIN_RDYNAMIC "%{rdynamic:-export_dynamic}"
275 #else
276 #define DARWIN_RDYNAMIC "%{rdynamic:%nrdynamic is not supported}"
277 #endif
278
279 #if LD64_HAS_PLATFORM_VERSION
280 #define DARWIN_PLATFORM_ID \
281 "%{mmacosx-version-min=*: -platform_version macos %* 0.0} "
282 #else
283 #define DARWIN_PLATFORM_ID \
284 "%{mmacosx-version-min=*:-macosx_version_min %*} "
285 #endif
286
287 /* Code built with mdynamic-no-pic does not support PIE/PIC, so we disallow
288 these combinations; we also ensure that the no_pie option is passed to
289 ld64 on system versions that default to PIE when mdynamic-no-pic is given.
290 FIXME: we should check that the linker supports the -pie and -no_pie.
291 options. */
292 #define DARWIN_PIE_SPEC \
293 "%{pie|fpie|fPIE:\
294 %{mdynamic-no-pic: \
295 %n'-mdynamic-no-pic' overrides '-pie', '-fpie' or '-fPIE'; \
296 :%:version-compare(>= 10.5 mmacosx-version-min= -pie) }; \
297 mdynamic-no-pic:%:version-compare(>= 10.7 mmacosx-version-min= -no_pie) } "
298
299 #define DARWIN_NOPIE_SPEC \
300 "%{no-pie|fno-pie|fno-PIE: \
301 %:version-compare(>= 10.7 mmacosx-version-min= -no_pie) }"
302
303 #define DARWIN_CC1_SPEC \
304 "%<dynamic %<dynamiclib %<force_cpusubtype_ALL %<multiply_defined* "
305
306 #define SUBSUBTARGET_OVERRIDE_OPTIONS \
307 do { \
308 darwin_override_options (); \
309 } while (0)
310
311 #define SUBTARGET_C_COMMON_OVERRIDE_OPTIONS do { \
312 if (flag_mkernel || flag_apple_kext) \
313 { \
314 if (flag_use_cxa_atexit == 2) \
315 flag_use_cxa_atexit = 0; \
316 /* kexts should always be built without the coalesced sections \
317 because the kernel loader doesn't grok such sections. */ \
318 flag_weak = 0; \
319 /* No RTTI in kexts. */ \
320 flag_rtti = 0; \
321 } \
322 } while (0)
323
324 /* Machine dependent cpp options. Don't add more options here, add
325 them to darwin_cpp_builtins in darwin-c.cc. */
326
327 #undef CPP_SPEC
328 #define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \
329 " %{pthread:-D_REENTRANT} "
330
331 /* This is a fix for PR41260 by passing -no_compact_unwind on darwin10 and
332 later until the assembler, linker and libunwind are able to deal with the
333 output from GCC.
334
335 FIXME: we should check that the linker supports the option.
336 */
337
338 #define DARWIN_NOCOMPACT_UNWIND \
339 " %:version-compare(>= 10.6 mmacosx-version-min= -no_compact_unwind) "
340
341 /* In Darwin linker specs we can put -lcrt0.o and ld will search the library
342 path for crt0.o or -lcrtx.a and it will search for libcrtx.a. As for
343 other ports, we can also put xxx.{o,a}%s and get the appropriate complete
344 startfile absolute directory. This latter point is important when we want
345 to override ld's rule of .dylib being found ahead of .a and the user wants
346 the convenience library to be linked. */
347
348 /* The LINK_COMMAND spec is mostly a clone of the standard LINK_COMMAND_SPEC,
349 plus precomp, libtool, and fat build additions.
350
351 In general, random Darwin linker flags should go into LINK_SPEC
352 instead of LINK_COMMAND_SPEC. The command spec is better for
353 specifying the handling of options understood by generic Unix
354 linkers, and for positional arguments like libraries. */
355
356 #define LINK_COMMAND_SPEC_A \
357 "%{!c:%{!E:%{!S:%{!M:%{!MM:%{!fsyntax-only:%{!fdump=*: \
358 %(linker)" \
359 LINK_PLUGIN_SPEC \
360 "%{flto*:%<fcompare-debug*} \
361 %{flto} %{fno-lto} %{flto=*} \
362 %l " \
363 DARWIN_PLATFORM_ID \
364 LINK_COMPRESS_DEBUG_SPEC \
365 "%X %{s} %{t} %{Z} %{u*} \
366 %{e*} %{r} \
367 %{o*}%{!o:-o a.out} \
368 %{!r:%{!nostdlib:%{!nostartfiles:%S}}} \
369 %{L*} %(link_libgcc) %o \
370 %{!r:%{!nostdlib:%{!nodefaultlibs:\
371 %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} \
372 %{fopenacc|fopenmp|%:gt(%{ftree-parallelize-loops=*:%*} 1): \
373 %{static|static-libgcc|static-libstdc++|static-libgfortran: \
374 libgomp.a%s; : -lgomp }} \
375 %{fgnu-tm: \
376 %{static|static-libgcc|static-libstdc++|static-libgfortran: \
377 libitm.a%s; : -litm }} \
378 %{%:sanitize(address): -lasan } \
379 %{%:sanitize(undefined): -lubsan } \
380 %(link_ssp) \
381 %:version-compare(>< 10.6 10.7 mmacosx-version-min= -ld10-uwfef) \
382 %(link_gcc_c_sequence) \
383 %{!nodefaultexport:%{dylib|dynamiclib|bundle: \
384 %:version-compare(>= 10.11 asm_macosx_version_min= -U) \
385 %:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_get_address) \
386 %:version-compare(>= 10.11 asm_macosx_version_min= -exported_symbol) \
387 %:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_get_address) \
388 %:version-compare(>= 10.11 asm_macosx_version_min= -U) \
389 %:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_register_common) \
390 %:version-compare(>= 10.11 asm_macosx_version_min= -exported_symbol) \
391 %:version-compare(>= 10.11 asm_macosx_version_min= ___emutls_register_common) \
392 }} \
393 }}}\
394 %{!r:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} "\
395 DARWIN_PIE_SPEC \
396 DARWIN_NOPIE_SPEC \
397 DARWIN_RDYNAMIC \
398 DARWIN_NOCOMPACT_UNWIND \
399 "}}}}}}} %<pie %<no-pie %<rdynamic %<X %<rpath "
400
401 /* Spec that controls whether the debug linker is run automatically for
402 a link step. This needs to be done if there is a source file on the
403 command line which will result in a temporary object (and debug is
404 enabled). */
405
406 #define DSYMUTIL_SPEC \
407 "%{!c:%{!E:%{!S:%{!r:%{!M:%{!MM:%{!fsyntax-only:%{!fdump=*:\
408 %{g*:%{!gctf:%{!gbtf:%{%:debug-level-gt(0): -idsym \
409 %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm|.s|.f|.f90|\
410 .f95|.f03|.f77|.for|.F|.F90|.F95|.F03|.d: -dsym }\
411 }}}}\
412 }}}}}}}}"
413
414 #define LINK_COMMAND_SPEC LINK_COMMAND_SPEC_A DSYMUTIL_SPEC
415
416 /* Tell collect2 to run dsymutil for us as necessary. */
417 #define COLLECT_RUN_DSYMUTIL 1
418
419 /* We only want one instance of %G, since libSystem (Darwin's -lc) does not
420 depend on libgcc. */
421 #undef LINK_GCC_C_SEQUENCE_SPEC
422 #define LINK_GCC_C_SEQUENCE_SPEC \
423 "%G %{!nolibc:%L} "
424
425 /* ld64 supports a sysroot, it just has a different name and there's no easy
426 way to check for it at config time. */
427 #undef HAVE_LD_SYSROOT
428 #define HAVE_LD_SYSROOT 1
429 /* It seems the only (working) way to get a space after %R is to append a
430 dangling '/'. */
431 #define SYSROOT_SPEC "%{!isysroot*:-syslibroot %R/ } "
432
433 /* Do the same as clang, for now, and insert the sysroot for ld when an
434 isysroot is specified. */
435 #define LINK_SYSROOT_SPEC "%{isysroot*:-syslibroot %*} "
436
437 /* Suppress the addition of extra prefix paths when a sysroot is in use. */
438 #define STANDARD_STARTFILE_PREFIX_1 ""
439 #define STANDARD_STARTFILE_PREFIX_2 ""
440
441
442 /* Please keep the random linker options in alphabetical order.
443 Note that options taking arguments may appear multiple times on a command
444 line with different arguments each time, so put a * after their names so
445 all of them get passed. */
446 #define LINK_SPEC \
447 "%{static}%{!static:%{!dynamic:-dynamic}} \
448 %:remove-outfile(-ldl) \
449 %:remove-outfile(-lm) \
450 %:remove-outfile(-lpthread) \
451 %{fgnu-runtime: %{static|static-libgcc: \
452 %:replace-outfile(-lobjc libobjc-gnu.a%s); \
453 :%:replace-outfile(-lobjc -lobjc-gnu )}}\
454 %{static|static-libgcc|static-libgfortran:%:replace-outfile(-lgfortran libgfortran.a%s)}\
455 %{static|static-libgcc|static-libquadmath:%:replace-outfile(-lquadmath libquadmath.a%s)}\
456 %{static|static-libgcc|static-libphobos:%:replace-outfile(-lgphobos libgphobos.a%s)}\
457 %{static|static-libgcc|static-libstdc++|static-libgfortran:%:replace-outfile(-lgomp libgomp.a%s)}\
458 %{static|static-libgcc|static-libstdc++:%:replace-outfile(-lstdc++ libstdc++.a%s)}\
459 %{static|static-libgm2:%:replace-outfile(-lm2pim libm2pim.a%s)}\
460 %{static|static-libgm2:%:replace-outfile(-lm2iso libm2iso.a%s)}\
461 %{static|static-libgm2:%:replace-outfile(-lm2min libm2min.a%s)}\
462 %{static|static-libgm2:%:replace-outfile(-lm2log libm2log.a%s)}\
463 %{static|static-libgm2:%:replace-outfile(-lm2cor libm2cor.a%s)}\
464 %{force_cpusubtype_ALL:-arch %(darwin_arch)} \
465 %{!force_cpusubtype_ALL:-arch %(darwin_subarch)} "\
466 LINK_SYSROOT_SPEC \
467 "%{!multiply_defined*:%{shared-libgcc: \
468 %:version-compare(< 10.5 mmacosx-version-min= -multiply_defined) \
469 %:version-compare(< 10.5 mmacosx-version-min= suppress) }} \
470 %{sectalign*} %{sectcreate*} %{sectobjectsymbols*} %{sectorder*} \
471 %{segaddr*} %{segcreate*} %{segprot*} "
472
473 /* Machine dependent libraries. */
474
475 #define LIB_SPEC "%{!static:-lSystem}"
476
477 /* Note that by default, -lgcc_eh (which provides a statically-linked unwinder)
478 is not used. This is because, in general, we need to unwind through system
479 libraries that are linked with the shared unwinder in libunwind (or libgcc_s
480 for OSX 10.4/5 [darwin8/9]).
481
482 When -static-libgcc is forced: < 10.6, use the unwinder in libgcc_eh (and
483 find the emultls impl. there too).
484
485 For -static-libgcc: >= 10.6, the unwinder *still* comes from libSystem and
486 we find the emutls impl from lemutls_w. In either case, the builtins etc.
487 are linked from -lgcc. The eh library is still available so that it could
488 be specified explicitly if there is some reason to do so.
489
490 When we have specified shared-libgcc or any case that might require
491 exceptions, we pull the libgcc content (including emulated tls) from
492 -lgcc_s.1.1 in GCC and the unwinder from /usr/lib/libgcc_s.1 for < 10.6 and
493 libSystem for >= 10.6 respectively.
494 Otherwise, we just link the emutls/builtins from convenience libs.
495
496 We have to work around that DYLD_XXXX are disabled in macOS 10.11+ which
497 means that any bootstrap trying to use a shared libgcc with a bumped SO-
498 name will fail. This means that we do not accept shared libgcc for these
499 versions (the primary reason for forcing a shared libgcc was that it
500 contained the unwinder on Darwin8 and 9).
501
502 When using the shared version of gcc_s.1.1 the unwinder is provided by:
503 * Prior to 10.3.9, then we have to link the static eh lib, since there
504 is no shared unwinder version on the system.
505 * from 10.3.9 to 10.5, from /usr/lib/libgcc_s.1.dylib
506 * from 10.6 onwards, from libSystem.dylib
507 */
508 #undef REAL_LIBGCC_SPEC
509 #define REAL_LIBGCC_SPEC \
510 "%{static-libgcc|static: \
511 %:version-compare(!> 10.6 mmacosx-version-min= -lgcc_eh) \
512 %:version-compare(>= 10.6 mmacosx-version-min= -lemutls_w); \
513 shared-libgcc|fexceptions|fobjc-exceptions|fgnu-runtime: \
514 %:version-compare(!> 10.11 mmacosx-version-min= -lgcc_s.1.1) \
515 %:version-compare(>= 10.11 mmacosx-version-min= -lemutls_w) \
516 %:version-compare(!> 10.3.9 mmacosx-version-min= -lgcc_eh) \
517 %:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
518 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5); \
519 : -lemutls_w \
520 } -lgcc "
521
522 /* We specify crt0.o as -lcrt0.o so that ld will search the library path. */
523
524 #undef STARTFILE_SPEC
525 #define STARTFILE_SPEC \
526 "%{dynamiclib: %(darwin_dylib1) %{fgnu-tm: -lcrttms.o}} \
527 %{!dynamiclib:%{bundle:%(darwin_bundle1)} \
528 %{!bundle:%{pg:%{static:-lgcrt0.o} \
529 %{!static:%{object:-lgcrt0.o} \
530 %{!object:%{preload:-lgcrt0.o} \
531 %{!preload:-lgcrt1.o \
532 %:version-compare(>= 10.8 mmacosx-version-min= -no_new_main) \
533 %(darwin_crt2)}}}} \
534 %{!pg:%{static:-lcrt0.o} \
535 %{!static:%{object:-lcrt0.o} \
536 %{!object:%{preload:-lcrt0.o} \
537 %{!preload: %(darwin_crt1) \
538 %(darwin_crt2)}}}}}} \
539 %(darwin_crt3) %<dynamiclib "
540
541 /* We want a destructor last in the list. */
542 #define TM_DESTRUCTOR "%{fgnu-tm: -lcrttme.o}"
543 #define ENDFILE_SPEC TM_DESTRUCTOR
544
545 #define DARWIN_EXTRA_SPECS \
546 { "darwin_crt1", DARWIN_CRT1_SPEC }, \
547 { "darwin_crt2", DARWIN_CRT2_SPEC }, \
548 { "darwin_crt3", DARWIN_CRT3_SPEC }, \
549 { "darwin_dylib1", DARWIN_DYLIB1_SPEC }, \
550 { "darwin_bundle1", DARWIN_BUNDLE1_SPEC },
551
552 #define DARWIN_CRT1_SPEC \
553 "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o) \
554 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lcrt1.10.5.o) \
555 %:version-compare(>< 10.6 10.8 mmacosx-version-min= -lcrt1.10.6.o) \
556 %{fgnu-tm: -lcrttms.o}"
557
558 #define DARWIN_CRT2_SPEC ""
559
560 /* crt3.o provides __cxa_atexit on systems that don't have it (and a fix
561 up for faulty versions on 10.4). Since it's only used with C++, which
562 requires passing -shared-libgcc, key off that to avoid unnecessarily
563 adding a destructor to every program built for 10.4 or earlier. */
564
565 #define DARWIN_CRT3_SPEC \
566 "%{shared-libgcc:%:version-compare(< 10.5 mmacosx-version-min= crt3.o%s)}"
567
568 #define DARWIN_DYLIB1_SPEC \
569 "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o) \
570 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -ldylib1.10.5.o)"
571
572 #define DARWIN_BUNDLE1_SPEC \
573 "%{!static:%:version-compare(< 10.6 mmacosx-version-min= -lbundle1.o) \
574 %{fgnu-tm: -lcrttms.o}}"
575
576 #ifdef HAVE_AS_MMACOSX_VERSION_MIN_OPTION
577 /* Emit macosx version (but only major). */
578 #define ASM_MMACOSX_VERSION_MIN_SPEC \
579 "%{asm_macosx_version_min=*: -mmacosx-version-min=%* } \
580 %<asm_macosx_version_min=* "
581 #else
582 #define ASM_MMACOSX_VERSION_MIN_SPEC " %<asm_macosx_version_min=* "
583 #endif
584
585 #if HAVE_GNU_AS
586 /* The options are added in gcc.cc for this case. */
587 #define ASM_OPTIONS ""
588 #else
589 /* When we detect that we're cctools or llvm as, we need to insert the right
590 additional options. Actually, currently these are the same as GAS. */
591 #define ASM_OPTIONS "%{v} %{w:-W} %{I*}"
592 #endif
593
594 /* Default Darwin ASM_SPEC, very simple. */
595 #define ASM_SPEC \
596 "%{static} -arch %(darwin_arch) " \
597 ASM_OPTIONS ASM_MMACOSX_VERSION_MIN_SPEC
598
599 #define ASM_DEBUG_SPEC ""
600 #undef ASM_DEBUG_OPTION_SPEC
601 #define ASM_DEBUG_OPTION_SPEC ""
602
603 #define ASM_FINAL_SPEC \
604 "%{gsplit-dwarf:%ngsplit-dwarf is not supported on this platform} \
605 %<gsplit-dwarf"
606
607 /* We now require C++11 to bootstrap and newer tools than those based on
608 stabs, so require DWARF-2, even if stabs is supported by the assembler. */
609
610 #define DWARF2_DEBUGGING_INFO 1
611 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
612
613 #define DEBUG_FRAME_SECTION "__DWARF,__debug_frame,regular,debug"
614 #define DEBUG_INFO_SECTION "__DWARF,__debug_info,regular,debug"
615 #define DEBUG_ABBREV_SECTION "__DWARF,__debug_abbrev,regular,debug"
616 #define DEBUG_ARANGES_SECTION "__DWARF,__debug_aranges,regular,debug"
617 #define DEBUG_MACINFO_SECTION "__DWARF,__debug_macinfo,regular,debug"
618 #define DEBUG_LINE_SECTION "__DWARF,__debug_line,regular,debug"
619 #define DEBUG_LOC_SECTION "__DWARF,__debug_loc,regular,debug"
620 #define DEBUG_LOCLISTS_SECTION "__DWARF,__debug_loclists,regular,debug"
621
622 #define DEBUG_STR_SECTION "__DWARF,__debug_str,regular,debug"
623 #define DEBUG_STR_OFFSETS_SECTION "__DWARF,__debug_str_offs,regular,debug"
624 #define DEBUG_RANGES_SECTION "__DWARF,__debug_ranges,regular,debug"
625 #define DEBUG_RNGLISTS_SECTION "__DWARF,__debug_rnglists,regular,debug"
626 #define DEBUG_MACRO_SECTION "__DWARF,__debug_macro,regular,debug"
627
628 #define DEBUG_LTO_INFO_SECTION "__GNU_DWARF_LTO,__debug_info,regular,debug"
629 #define DEBUG_LTO_ABBREV_SECTION "__GNU_DWARF_LTO,__debug_abbrev,regular,debug"
630 #define DEBUG_LTO_MACINFO_SECTION "__GNU_DWARF_LTO,__debug_macinfo,regular,debug"
631 #define DEBUG_LTO_LINE_SECTION "__GNU_DWARF_LTO,__debug_line,regular,debug"
632 #define DEBUG_LTO_STR_SECTION "__GNU_DWARF_LTO,__debug_str,regular,debug"
633 #define DEBUG_LTO_MACRO_SECTION "__GNU_DWARF_LTO,__debug_macro,regular,debug"
634
635 #define TARGET_WANT_DEBUG_PUB_SECTIONS true
636 #define DEBUG_PUBNAMES_SECTION ((debug_generate_pub_sections == 2) \
637 ? "__DWARF,__debug_gnu_pubn,regular,debug" \
638 : "__DWARF,__debug_pubnames,regular,debug")
639
640 #define DEBUG_PUBTYPES_SECTION ((debug_generate_pub_sections == 2) \
641 ? "__DWARF,__debug_gnu_pubt,regular,debug" \
642 : "__DWARF,__debug_pubtypes,regular,debug")
643
644 /* GCC's definition of 'one_only' is the same as its definition of 'weak'. */
645 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
646
647 /* Mach-O supports 'weak imports', and 'weak definitions' in coalesced
648 sections. machopic_select_section ensures that weak variables go in
649 coalesced sections. Weak aliases (or any other kind of aliases) are
650 not supported. Weak symbols that aren't visible outside the .s file
651 are not supported. */
652 #define ASM_WEAKEN_DECL(FILE, DECL, NAME, ALIAS) \
653 do { \
654 if (ALIAS) \
655 { \
656 warning (0, "alias definitions not supported in Mach-O; ignored"); \
657 break; \
658 } \
659 \
660 if (! DECL_EXTERNAL (DECL) && TREE_PUBLIC (DECL)) \
661 targetm.asm_out.globalize_label (FILE, NAME); \
662 if (DECL_EXTERNAL (DECL)) \
663 fputs ("\t.weak_reference ", FILE); \
664 else if (lookup_attribute ("weak_import", DECL_ATTRIBUTES (DECL))) \
665 break; \
666 else if (TREE_PUBLIC (DECL)) \
667 fputs ("\t.weak_definition ", FILE); \
668 else \
669 break; \
670 assemble_name (FILE, NAME); \
671 fputc ('\n', FILE); \
672 } while (0)
673
674 /* Darwin has the pthread routines in libSystem, which every program
675 links to, so there's no need for weak-ness for that. */
676 #define GTHREAD_USE_WEAK 0
677
678 /* On Darwin, we don't (at the time of writing) have linkonce sections
679 with names, so it's safe to make the class data not comdat. */
680 #define TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT hook_bool_void_false
681
682 /* For efficiency, on Darwin the RTTI information that is always
683 emitted in the standard C++ library should not be COMDAT. */
684 #define TARGET_CXX_LIBRARY_RTTI_COMDAT hook_bool_void_false
685
686 /* We make exception information linkonce. */
687 #undef TARGET_USES_WEAK_UNWIND_INFO
688 #define TARGET_USES_WEAK_UNWIND_INFO 1
689
690 /* We need to use a nonlocal label for the start of an EH frame: the
691 Darwin linker requires that a coalesced section start with a label.
692 Unfortunately, it also requires that 'debug' sections don't contain
693 labels. */
694 #undef FRAME_BEGIN_LABEL
695 #define FRAME_BEGIN_LABEL (for_eh ? "EH_frame" : "Lframe")
696
697 /* Emit a label for the FDE corresponding to DECL. EMPTY means
698 emit a label for an empty FDE. */
699 #define TARGET_ASM_EMIT_UNWIND_LABEL darwin_emit_unwind_label
700
701 /* Emit a label to separate the exception table. */
702 #define TARGET_ASM_EMIT_EXCEPT_TABLE_LABEL darwin_emit_except_table_label
703
704 /* Make an EH (personality or LDSA) symbol indirect as needed. */
705 #define TARGET_ASM_MAKE_EH_SYMBOL_INDIRECT darwin_make_eh_symbol_indirect
706
707 /* Some of Darwin's unwinders need current frame address state to be reset
708 after a DW_CFA_restore_state recovers the register values. */
709 #undef TARGET_ASM_SHOULD_RESTORE_CFA_STATE
710 #define TARGET_ASM_SHOULD_RESTORE_CFA_STATE darwin_should_restore_cfa_state
711
712 /* Our profiling scheme doesn't LP labels and counter words. */
713
714 #define NO_PROFILE_COUNTERS 1
715
716 #undef INIT_SECTION_ASM_OP
717 #define INIT_SECTION_ASM_OP ""
718
719 #undef INVOKE__main
720
721 #define TARGET_ASM_CONSTRUCTOR machopic_asm_out_constructor
722 #define TARGET_ASM_DESTRUCTOR machopic_asm_out_destructor
723
724 /* Always prefix with an underscore. */
725
726 #define USER_LABEL_PREFIX "_"
727
728 /* A dummy symbol that will be replaced with the function base name. */
729 #define MACHOPIC_FUNCTION_BASE_NAME "<pic base>"
730
731 /* Don't output a .file directive. That is only used by the assembler for
732 error reporting. */
733 #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
734 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
735
736 #undef TARGET_ASM_FILE_END
737 #define TARGET_ASM_FILE_END darwin_file_end
738
739 /* Because Mach-O relocations have a counter from 1 to 255 for the
740 section number they apply to, it is necessary to output all
741 normal sections before the LTO sections, to make sure that the
742 sections that may have relocations always have a section number
743 smaller than 255. */
744 #undef TARGET_ASM_LTO_START
745 #define TARGET_ASM_LTO_START darwin_asm_lto_start
746 #undef TARGET_ASM_LTO_END
747 #define TARGET_ASM_LTO_END darwin_asm_lto_end
748
749 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
750 fprintf (FILE, "\t.space " HOST_WIDE_INT_PRINT_UNSIGNED"\n", SIZE)
751
752 /* Give ObjC methods pretty symbol names. */
753
754 #undef OBJC_GEN_METHOD_LABEL
755 #define OBJC_GEN_METHOD_LABEL(BUF,IS_INST,CLASS_NAME,CAT_NAME,SEL_NAME,NUM) \
756 do { if (CAT_NAME) \
757 sprintf (BUF, "%c[%s(%s) %s]", (IS_INST) ? '-' : '+', \
758 (CLASS_NAME), (CAT_NAME), (SEL_NAME)); \
759 else \
760 sprintf (BUF, "%c[%s %s]", (IS_INST) ? '-' : '+', \
761 (CLASS_NAME), (SEL_NAME)); \
762 } while (0)
763
764 #undef ASM_DECLARE_OBJECT_NAME
765 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
766 darwin_asm_declare_object_name ((FILE), (NAME), (DECL))
767
768 /* The RTTI data (e.g., __ti4name) is common and public (and static),
769 but it does need to be referenced via indirect PIC data pointers.
770 The machopic_define_symbol calls are telling the machopic subsystem
771 that the name *is* defined in this module, so it doesn't need to
772 make them indirect. */
773
774 #undef ASM_DECLARE_FUNCTION_NAME
775 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
776 do { \
777 const char *xname = NAME; \
778 if (GET_CODE (XEXP (DECL_RTL (DECL), 0)) != SYMBOL_REF) \
779 xname = IDENTIFIER_POINTER (DECL_NAME (DECL)); \
780 if (! DECL_WEAK (DECL) \
781 && ((TREE_STATIC (DECL) \
782 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
783 || DECL_INITIAL (DECL))) \
784 machopic_define_symbol (DECL_RTL (DECL)); \
785 if ((TREE_STATIC (DECL) \
786 && (!DECL_COMMON (DECL) || !TREE_PUBLIC (DECL))) \
787 || DECL_INITIAL (DECL)) \
788 (* targetm.encode_section_info) (DECL, DECL_RTL (DECL), false); \
789 ASM_OUTPUT_FUNCTION_LABEL (FILE, xname, DECL); \
790 } while (0)
791
792 #undef TARGET_ASM_DECLARE_CONSTANT_NAME
793 #define TARGET_ASM_DECLARE_CONSTANT_NAME darwin_asm_declare_constant_name
794
795 /* Wrap new method names in quotes so the assembler doesn't gag.
796 Make Objective-C internal symbols local and in doing this, we need
797 to accommodate the name mangling done by c++ on file scope locals. */
798
799 int darwin_label_is_anonymous_local_objc_name (const char *name);
800
801 #undef ASM_OUTPUT_LABELREF
802 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
803 do { \
804 const char *xname = (NAME); \
805 if (! strcmp (xname, MACHOPIC_FUNCTION_BASE_NAME)) \
806 machopic_output_function_base_name(FILE); \
807 else if (xname[0] == '&' || xname[0] == '*') \
808 { \
809 int len = strlen (xname); \
810 if (len > 6 && !strcmp ("$stub", xname + len - 5)) \
811 machopic_validate_stub_or_non_lazy_ptr (xname); \
812 else if (len > 7 && !strcmp ("$stub\"", xname + len - 6)) \
813 machopic_validate_stub_or_non_lazy_ptr (xname); \
814 else if (len > 14 && !strcmp ("$non_lazy_ptr", xname + len - 13)) \
815 machopic_validate_stub_or_non_lazy_ptr (xname); \
816 else if (len > 15 && !strcmp ("$non_lazy_ptr\"", xname + len - 14)) \
817 machopic_validate_stub_or_non_lazy_ptr (xname); \
818 if (xname[1] != '"' && name_needs_quotes (&xname[1])) \
819 fprintf (FILE, "\"%s\"", &xname[1]); \
820 else \
821 fputs (&xname[1], FILE); \
822 } \
823 else if (xname[0] == '+' || xname[0] == '-') \
824 fprintf (FILE, "\"%s\"", xname); \
825 else if (darwin_label_is_anonymous_local_objc_name (xname)) \
826 fprintf (FILE, "L%s", xname); \
827 else if (xname[0] != '"' && name_needs_quotes (xname)) \
828 asm_fprintf (FILE, "\"%U%s\"", xname); \
829 else \
830 asm_fprintf (FILE, "%U%s", xname); \
831 } while (0)
832
833 /* Output before executable code. */
834 #undef TEXT_SECTION_ASM_OP
835 #define TEXT_SECTION_ASM_OP "\t.text"
836
837 /* Output before writable data. */
838
839 #undef DATA_SECTION_ASM_OP
840 #define DATA_SECTION_ASM_OP "\t.data"
841
842 #undef ALIGN_ASM_OP
843 #define ALIGN_ASM_OP ".align"
844
845 #undef ASM_OUTPUT_ALIGN
846 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
847 if ((LOG) != 0) \
848 fprintf (FILE, "\t%s\t%d\n", ALIGN_ASM_OP, (LOG))
849
850 /* The maximum alignment which the object file format can support in bits
851 which depends on the OS version and whether the object is a common
852 variable. */
853
854 #undef MAX_OFILE_ALIGNMENT
855 #define MAX_OFILE_ALIGNMENT ((1U << L2_MAX_OFILE_ALIGNMENT) * 8U)
856
857 /* These are the three variants that emit referenced blank space. */
858 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
859 darwin_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
860
861 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
862 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
863 darwin_asm_output_aligned_decl_local \
864 ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
865
866 #undef ASM_OUTPUT_ALIGNED_DECL_COMMON
867 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \
868 darwin_asm_output_aligned_decl_common \
869 ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
870
871 /* The generic version, archs should over-ride where required. */
872 #define MACHOPIC_NL_SYMBOL_PTR_SECTION ".non_lazy_symbol_pointer"
873
874 /* Declare the section variables. */
875 #ifndef USED_FOR_TARGET
876 enum darwin_section_enum {
877 #define DEF_SECTION(NAME, FLAGS, DIRECTIVE, OBJC) NAME,
878 #include "darwin-sections.def"
879 #undef DEF_SECTION
880 NUM_DARWIN_SECTIONS
881 };
882 extern GTY(()) section * darwin_sections[NUM_DARWIN_SECTIONS];
883 #endif
884
885 #undef TARGET_ASM_SELECT_SECTION
886 #define TARGET_ASM_SELECT_SECTION machopic_select_section
887
888 #undef TARGET_ASM_FUNCTION_SECTION
889 #define TARGET_ASM_FUNCTION_SECTION darwin_function_section
890
891 #undef TARGET_ASM_SELECT_RTX_SECTION
892 #define TARGET_ASM_SELECT_RTX_SECTION machopic_select_rtx_section
893 #undef TARGET_ASM_UNIQUE_SECTION
894 #define TARGET_ASM_UNIQUE_SECTION darwin_unique_section
895 #undef TARGET_ASM_FUNCTION_RODATA_SECTION
896 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
897
898 #undef TARGET_ASM_TM_CLONE_TABLE_SECTION
899 #define TARGET_ASM_TM_CLONE_TABLE_SECTION darwin_tm_clone_table_section
900
901 #undef TARGET_ASM_RELOC_RW_MASK
902 #define TARGET_ASM_RELOC_RW_MASK machopic_reloc_rw_mask
903
904 /* Globalizing directive for a label. */
905 #define GLOBAL_ASM_OP "\t.globl "
906 #define TARGET_ASM_GLOBALIZE_LABEL darwin_globalize_label
907
908 /* Emit an assembler directive to set visibility for a symbol. Used
909 to support visibility attribute and Darwin's private extern
910 feature. */
911 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
912 #define TARGET_ASM_ASSEMBLE_VISIBILITY darwin_assemble_visibility
913
914 /* Extra attributes for Darwin. */
915 #define SUBTARGET_ATTRIBUTE_TABLE \
916 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, \
917 affects_type_identity, handler, exclude } */ \
918 { "apple_kext_compatibility", 0, 0, false, true, false, false, \
919 darwin_handle_kext_attribute, NULL }, \
920 { "weak_import", 0, 0, true, false, false, false, \
921 darwin_handle_weak_import_attribute, NULL }
922
923 /* Make local constant labels linker-visible, so that if one follows a
924 weak_global constant, ld64 will be able to separate the atoms. */
925 #undef ASM_GENERATE_INTERNAL_LABEL
926 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
927 do { \
928 if (strcmp ("LC", PREFIX) == 0) \
929 sprintf (LABEL, "*%s%ld", "lC", (long)(NUM)); \
930 else if (strcmp ("Lubsan_data", PREFIX) == 0) \
931 sprintf (LABEL, "*%s%ld", "lubsan_data", (long)(NUM));\
932 else if (strcmp ("Lubsan_type", PREFIX) == 0) \
933 sprintf (LABEL, "*%s%ld", "lubsan_type", (long)(NUM));\
934 else if (strcmp ("LASAN", PREFIX) == 0) \
935 sprintf (LABEL, "*%s%ld", "lASAN", (long)(NUM));\
936 else if (strcmp ("LTRAMP", PREFIX) == 0) \
937 sprintf (LABEL, "*%s%ld", "lTRAMP", (long)(NUM));\
938 else \
939 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM)); \
940 } while (0)
941
942 #undef TARGET_ASM_MARK_DECL_PRESERVED
943 #define TARGET_ASM_MARK_DECL_PRESERVED darwin_mark_decl_preserved
944
945 /* Any port using this header needs to define the first available
946 subtarget symbol bit: SYMBOL_FLAG_SUBT_DEP. */
947
948 /* Is a variable. */
949 #define MACHO_SYMBOL_FLAG_VARIABLE (SYMBOL_FLAG_SUBT_DEP)
950 #define MACHO_SYMBOL_VARIABLE_P(RTX) \
951 ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_VARIABLE) != 0)
952
953 /* Set on a symbol that must be indirected, even when there is a
954 definition in the TU. The ABI mandates that common symbols are so
955 indirected, as are weak. If 'fix-and-continue' is operational then
956 data symbols might also be. */
957
958 #define MACHO_SYMBOL_FLAG_MUST_INDIRECT ((SYMBOL_FLAG_SUBT_DEP) << 1)
959 #define MACHO_SYMBOL_MUST_INDIRECT_P(RTX) \
960 ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_MUST_INDIRECT) != 0)
961
962 /* Set on a symbol with SYMBOL_FLAG_FUNCTION or MACHO_SYMBOL_FLAG_VARIABLE
963 to indicate that the function or variable is considered defined in this
964 translation unit. */
965
966 #define MACHO_SYMBOL_FLAG_DEFINED ((SYMBOL_FLAG_SUBT_DEP) << 2)
967 #define MACHO_SYMBOL_DEFINED_P(RTX) \
968 ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_DEFINED) != 0)
969
970 /* Set on a symbol that has specified non-default visibility. */
971
972 #define MACHO_SYMBOL_FLAG_HIDDEN_VIS ((SYMBOL_FLAG_SUBT_DEP) << 3)
973 #define MACHO_SYMBOL_HIDDEN_VIS_P(RTX) \
974 ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_HIDDEN_VIS) != 0)
975
976 /* Set on a symbol that should be made visible to the linker (overriding
977 'L' symbol prefixes). */
978
979 #define MACHO_SYMBOL_FLAG_LINKER_VIS ((SYMBOL_FLAG_SUBT_DEP) << 4)
980 #define MACHO_SYMBOL_LINKER_VIS_P(RTX) \
981 ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_LINKER_VIS) != 0)
982
983 /* Set on a symbol that is a pic stub or symbol indirection (i.e. the
984 L_xxxxx${stub,non_lazy_ptr,lazy_ptr}. */
985
986 #define MACHO_SYMBOL_FLAG_INDIRECTION ((SYMBOL_FLAG_SUBT_DEP) << 5)
987 #define MACHO_SYMBOL_INDIRECTION_P(RTX) \
988 ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_INDIRECTION) != 0)
989
990 /* Set on a symbol to indicate when fix-and-continue style code
991 generation is being used and the symbol refers to a static symbol
992 that should be rebound from new instances of a translation unit to
993 the original instance of the data. */
994
995 #define MACHO_SYMBOL_FLAG_STATIC ((SYMBOL_FLAG_SUBT_DEP) << 6)
996 #define MACHO_SYMBOL_STATIC_P(RTX) \
997 ((SYMBOL_REF_FLAGS (RTX) & MACHO_SYMBOL_FLAG_STATIC) != 0)
998
999 /* Symbolic names for various things we might know about a symbol. */
1000
1001 enum machopic_addr_class {
1002 MACHOPIC_UNDEFINED,
1003 MACHOPIC_DEFINED_DATA,
1004 MACHOPIC_UNDEFINED_DATA,
1005 MACHOPIC_DEFINED_FUNCTION,
1006 MACHOPIC_UNDEFINED_FUNCTION
1007 };
1008
1009 /* Macros defining the various PIC cases. */
1010
1011 #undef MACHO_DYNAMIC_NO_PIC_P
1012 #define MACHO_DYNAMIC_NO_PIC_P (TARGET_MACHO_DYNAMIC_NO_PIC)
1013 #undef MACHOPIC_INDIRECT
1014 #define MACHOPIC_INDIRECT (flag_pic || MACHO_DYNAMIC_NO_PIC_P)
1015 #define MACHOPIC_JUST_INDIRECT (MACHO_DYNAMIC_NO_PIC_P)
1016 #undef MACHOPIC_PURE
1017 #define MACHOPIC_PURE (flag_pic && ! MACHO_DYNAMIC_NO_PIC_P)
1018
1019 #undef TARGET_ENCODE_SECTION_INFO
1020 #define TARGET_ENCODE_SECTION_INFO darwin_encode_section_info
1021 #undef TARGET_STRIP_NAME_ENCODING
1022 #define TARGET_STRIP_NAME_ENCODING default_strip_name_encoding
1023
1024 #define GEN_BINDER_NAME_FOR_STUB(BUF,STUB,STUB_LENGTH) \
1025 do { \
1026 const char *const stub_ = (STUB); \
1027 char *buffer_ = (BUF); \
1028 strcpy (buffer_, stub_); \
1029 if (stub_[0] == '"') \
1030 { \
1031 strcpy (buffer_ + (STUB_LENGTH) - 1, "_binder\""); \
1032 } \
1033 else \
1034 { \
1035 strcpy (buffer_ + (STUB_LENGTH), "_binder"); \
1036 } \
1037 } while (0)
1038
1039 #define GEN_SYMBOL_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
1040 do { \
1041 const char *const symbol_ = (SYMBOL); \
1042 char *buffer_ = (BUF); \
1043 if (name_needs_quotes (symbol_) && symbol_[0] != '"') \
1044 { \
1045 sprintf (buffer_, "\"%s\"", symbol_); \
1046 } \
1047 else \
1048 { \
1049 strcpy (buffer_, symbol_); \
1050 } \
1051 } while (0)
1052
1053 /* Given a symbol name string, create the lazy pointer version
1054 of the symbol name. */
1055
1056 #define GEN_LAZY_PTR_NAME_FOR_SYMBOL(BUF,SYMBOL,SYMBOL_LENGTH) \
1057 do { \
1058 const char *symbol_ = (SYMBOL); \
1059 char *buffer_ = (BUF); \
1060 if (symbol_[0] == '"') \
1061 { \
1062 strcpy (buffer_, "\"L"); \
1063 strcpy (buffer_ + 2, symbol_ + 1); \
1064 strcpy (buffer_ + (SYMBOL_LENGTH), "$lazy_ptr\""); \
1065 } \
1066 else if (name_needs_quotes (symbol_)) \
1067 { \
1068 strcpy (buffer_, "\"L"); \
1069 strcpy (buffer_ + 2, symbol_); \
1070 strcpy (buffer_ + (SYMBOL_LENGTH) + 2, "$lazy_ptr\""); \
1071 } \
1072 else \
1073 { \
1074 strcpy (buffer_, "L"); \
1075 strcpy (buffer_ + 1, symbol_); \
1076 strcpy (buffer_ + (SYMBOL_LENGTH) + 1, "$lazy_ptr"); \
1077 } \
1078 } while (0)
1079
1080 #define EH_FRAME_SECTION_NAME "__TEXT"
1081 #define EH_FRAME_SECTION_ATTR ",coalesced,no_toc+strip_static_syms+live_support"
1082
1083 #undef ASM_PREFERRED_EH_DATA_FORMAT
1084 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
1085 (((CODE) == 2 && (GLOBAL) == 1) \
1086 ? (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4) : \
1087 ((CODE) == 1 || (GLOBAL) == 0) ? DW_EH_PE_pcrel : DW_EH_PE_absptr)
1088
1089 #define ASM_OUTPUT_DWARF_DELTA(FILE,SIZE,LABEL1,LABEL2) \
1090 darwin_asm_output_dwarf_delta (FILE, SIZE, LABEL1, LABEL2, 0)
1091
1092 #define ASM_OUTPUT_DWARF_OFFSET(FILE,SIZE,LABEL,OFFSET,BASE) \
1093 darwin_asm_output_dwarf_offset (FILE, SIZE, LABEL, OFFSET, BASE)
1094
1095 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(ASM_OUT_FILE, ENCODING, SIZE, ADDR, DONE) \
1096 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) { \
1097 darwin_non_lazy_pcrel (ASM_OUT_FILE, ADDR); \
1098 goto DONE; \
1099 }
1100
1101 /* Experimentally, putting jump tables in text is faster on SPEC.
1102 Also this is needed for correctness for coalesced functions. */
1103
1104 #ifndef JUMP_TABLES_IN_TEXT_SECTION
1105 #define JUMP_TABLES_IN_TEXT_SECTION 1
1106 #endif
1107
1108 #define TARGET_TERMINATE_DW2_EH_FRAME_INFO false
1109
1110 #define TARGET_ASM_INIT_SECTIONS darwin_init_sections
1111 #undef TARGET_ASM_NAMED_SECTION
1112 #define TARGET_ASM_NAMED_SECTION darwin_asm_named_section
1113
1114 #define DARWIN_REGISTER_TARGET_PRAGMAS() \
1115 do { \
1116 if (!flag_preprocess_only) \
1117 cpp_register_pragma (parse_in, NULL, "mark", \
1118 darwin_pragma_ignore, false); \
1119 c_register_pragma (0, "options", darwin_pragma_options); \
1120 c_register_pragma (0, "segment", darwin_pragma_ignore); \
1121 c_register_pragma (0, "unused", darwin_pragma_unused); \
1122 c_register_pragma (0, "ms_struct", darwin_pragma_ms_struct); \
1123 } while (0)
1124
1125 #undef ASM_APP_ON
1126 #define ASM_APP_ON ""
1127 #undef ASM_APP_OFF
1128 #define ASM_APP_OFF ""
1129
1130 void darwin_register_frameworks (const char *, const char *, int);
1131 void darwin_register_objc_includes (const char *, const char *, int);
1132 #define TARGET_EXTRA_PRE_INCLUDES darwin_register_objc_includes
1133 #define TARGET_EXTRA_INCLUDES darwin_register_frameworks
1134
1135 void add_framework_path (char *);
1136 #define TARGET_OPTF add_framework_path
1137
1138 #define TARGET_POSIX_IO
1139
1140 #define WINT_TYPE "int"
1141
1142 /* Every program on darwin links against libSystem which contains the pthread
1143 routines, so there's no need to explicitly call out when doing threaded
1144 work. */
1145
1146 #undef GOMP_SELF_SPECS
1147 #define GOMP_SELF_SPECS ""
1148 #undef GTM_SELF_SPECS
1149 #define GTM_SELF_SPECS ""
1150
1151 /* Darwin disables section anchors by default.
1152 They should be enabled per arch where support exists in that arch. */
1153 #define TARGET_ASM_OUTPUT_ANCHOR NULL
1154 #define DARWIN_SECTION_ANCHORS 0
1155
1156 #define HAVE_ENABLE_EXECUTE_STACK
1157
1158 /* For Apple KEXTs, we make the constructors return this to match gcc
1159 2.95. */
1160 #define TARGET_CXX_CDTOR_RETURNS_THIS (darwin_kextabi_p)
1161 #define TARGET_KEXTABI flag_apple_kext
1162
1163 /* We have target-specific builtins. */
1164 #define SUBTARGET_FOLD_BUILTIN darwin_fold_builtin
1165
1166 #define TARGET_N_FORMAT_TYPES 1
1167 #define TARGET_FORMAT_TYPES darwin_additional_format_types
1168
1169 #ifndef USED_FOR_TARGET
1170 extern void darwin_driver_init (unsigned int *,struct cl_decoded_option **);
1171 #define GCC_DRIVER_HOST_INITIALIZATION \
1172 darwin_driver_init (&decoded_options_count, &decoded_options)
1173 #endif
1174
1175 /* The Apple assembler and linker do not support constructor priorities. */
1176 #undef SUPPORTS_INIT_PRIORITY
1177 #define SUPPORTS_INIT_PRIORITY 0
1178
1179 #undef STACK_CHECK_STATIC_BUILTIN
1180 #define STACK_CHECK_STATIC_BUILTIN 1
1181
1182 /* When building cross-compilers (and native crosses) we shall default to
1183 providing an osx-version-min of this unless overridden by the User.
1184 10.5 is the only version that fully supports all our archs so that's the
1185 fall-back default. */
1186 #ifndef DEF_MIN_OSX_VERSION
1187 #define DEF_MIN_OSX_VERSION "10.5"
1188 #endif
1189
1190 /* Later versions of ld64 support coalescing weak code/data without requiring
1191 that they be placed in specially identified sections. This is the earliest
1192 _tested_ version known to support this so far. */
1193 #define MIN_LD64_NO_COAL_SECTS "236.3"
1194
1195 /* From at least version 62.1, ld64 can build symbol indirection stubs as
1196 needed, and there is no need for the compiler to emit them. */
1197 #define MIN_LD64_OMIT_STUBS "62.1"
1198
1199 /* Emit start labels for init and term sections from this version. */
1200 #define MIN_LD64_INIT_TERM_START_LABELS "136.0"
1201
1202 /* If we have no definition for the linker version, pick the minimum version
1203 that will bootstrap the compiler. */
1204 #ifndef LD64_VERSION
1205 # ifndef DEF_LD64
1206 # define LD64_VERSION "85.2.1"
1207 # else
1208 # define LD64_VERSION DEF_LD64
1209 # endif
1210 #endif
1211
1212 /* CTF and BTF support. */
1213 #undef CTF_INFO_SECTION_NAME
1214 #define CTF_INFO_SECTION_NAME "__CTF_BTF,__ctf,regular,debug"
1215 #undef BTF_INFO_SECTION_NAME
1216 #define BTF_INFO_SECTION_NAME "__CTF_BTF,__btf,regular,debug"
1217
1218 #endif /* CONFIG_DARWIN_H */