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1/* Target definitions for x86 running Darwin.
2 Copyright (C) 2001-2017 Free Software Foundation, Inc.
3 Contributed by Apple Computer Inc.
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 3, or (at your option)
10any later version.
11
12GCC is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GCC; see the file COPYING3. If not see
19<http://www.gnu.org/licenses/>. */
20
21/* Enable Mach-O bits in generic x86 code. */
22#undef TARGET_MACHO
23#define TARGET_MACHO 1
24
25#undef DARWIN_X86
26#define DARWIN_X86 1
27
28#undef TARGET_64BIT
29#undef TARGET_64BIT_P
30#define TARGET_64BIT TARGET_ISA_64BIT
31#define TARGET_64BIT_P(x) TARGET_ISA_64BIT_P(x)
32
33#ifdef IN_LIBGCC2
34#undef TARGET_64BIT
35#ifdef __x86_64__
36#define TARGET_64BIT 1
37#else
38#define TARGET_64BIT 0
39#endif
40#endif
41
42/* WORKAROUND pr80556:
43 For x86_64 Darwin10 and later, the unwinder is in libunwind (redirected
44 from libSystem). This doesn't use the keymgr (see keymgr.c) and therefore
45 the calls that libgcc makes to obtain the KEYMGR_GCC3_DW2_OBJ_LIST are not
46 updated to include new images, and might not even be valid for a single
47 image.
48 Therefore, for 64b exes at least, we must use the libunwind implementation,
49 even when static-libgcc is specified. We put libSystem first so that
50 unwinder symbols are satisfied from there. */
51#undef REAL_LIBGCC_SPEC
52#define REAL_LIBGCC_SPEC \
53 "%{static-libgcc|static: \
54 %{m64:%:version-compare(>= 10.6 mmacosx-version-min= -lSystem)} \
55 -lgcc_eh -lgcc; \
56 shared-libgcc|fexceptions|fgnu-runtime: \
57 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_s.10.4) \
58 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5) \
59 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4) \
60 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5) \
61 -lgcc ; \
62 :%:version-compare(>< 10.3.9 10.5 mmacosx-version-min= -lgcc_s.10.4) \
63 %:version-compare(>< 10.5 10.6 mmacosx-version-min= -lgcc_s.10.5) \
64 %:version-compare(!> 10.5 mmacosx-version-min= -lgcc_ext.10.4) \
65 %:version-compare(>= 10.5 mmacosx-version-min= -lgcc_ext.10.5) \
66 -lgcc }"
67
68/* Size of the Obj-C jump buffer. */
69#define OBJC_JBLEN ((TARGET_64BIT) ? ((9 * 2) + 3 + 16) : (18))
70
71#undef TARGET_FPMATH_DEFAULT
72#define TARGET_FPMATH_DEFAULT (TARGET_SSE ? FPMATH_SSE : FPMATH_387)
73
74#define TARGET_OS_CPP_BUILTINS() \
75 do \
76 { \
77 builtin_define ("__LITTLE_ENDIAN__"); \
78 darwin_cpp_builtins (pfile); \
79 } \
80 while (0)
81
82#undef PTRDIFF_TYPE
83#define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
84
85#undef WCHAR_TYPE
86#define WCHAR_TYPE "int"
87
88#undef WCHAR_TYPE_SIZE
89#define WCHAR_TYPE_SIZE 32
90
91/* Generate branch islands stubs if this is true. */
92extern int darwin_emit_branch_islands;
93
94#undef TARGET_MACHO_BRANCH_ISLANDS
95#define TARGET_MACHO_BRANCH_ISLANDS darwin_emit_branch_islands
96
97/* For compatibility with OSX system tools, use the new style of pic stub
98 if this is set. */
99#undef MACHOPIC_ATT_STUB
100#define MACHOPIC_ATT_STUB (darwin_macho_att_stub)
101
102#undef MAX_BITS_PER_WORD
103#define MAX_BITS_PER_WORD 64
104
105#undef FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN
106#define FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN (0)
107
108#undef TARGET_KEEPS_VECTOR_ALIGNED_STACK
109#define TARGET_KEEPS_VECTOR_ALIGNED_STACK 1
110
111/* On Darwin, the stack is 128-bit aligned at the point of every call.
112 Failure to ensure this will lead to a crash in the system libraries
113 or dynamic loader. */
114#undef STACK_BOUNDARY
115#define STACK_BOUNDARY \
116 ((profile_flag || (TARGET_64BIT && ix86_abi == MS_ABI)) \
117 ? 128 : BITS_PER_WORD)
118
119#undef MAIN_STACK_BOUNDARY
120#define MAIN_STACK_BOUNDARY 128
121
122/* Since we'll never want a stack boundary less aligned than 128 bits
123 we need the extra work here otherwise bits of gcc get very grumpy
124 when we ask for lower alignment. We could just reject values less
125 than 128 bits for Darwin, but it's easier to up the alignment if
126 it's below the minimum. */
127#undef PREFERRED_STACK_BOUNDARY
128#define PREFERRED_STACK_BOUNDARY \
129 MAX (128, ix86_preferred_stack_boundary)
130
131/* We want -fPIC by default, unless we're using -static to compile for
132 the kernel or some such. */
133
134#undef CC1_SPEC
135#define CC1_SPEC "%(cc1_cpu) \
136 %{!mkernel:%{!static:%{!mdynamic-no-pic:-fPIC}}} \
137 %{g: %{!fno-eliminate-unused-debug-symbols: -feliminate-unused-debug-symbols }} " \
138 DARWIN_CC1_SPEC
139
140#undef ASM_SPEC
141#define ASM_SPEC "-arch %(darwin_arch) \
142 " ASM_OPTIONS " -force_cpusubtype_ALL \
143 %{static}" ASM_MMACOSX_VERSION_MIN_SPEC
144
145#define DARWIN_ARCH_SPEC "%{m64:x86_64;:i386}"
146#define DARWIN_SUBARCH_SPEC DARWIN_ARCH_SPEC
147
148#undef ENDFILE_SPEC
149#define ENDFILE_SPEC \
150 "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
151 %{mpc32:crtprec32.o%s} \
152 %{mpc64:crtprec64.o%s} \
153 %{mpc80:crtprec80.o%s}" TM_DESTRUCTOR
154
155#undef SUBTARGET_EXTRA_SPECS
156#define SUBTARGET_EXTRA_SPECS \
157 DARWIN_EXTRA_SPECS \
158 { "darwin_arch", DARWIN_ARCH_SPEC }, \
159 { "darwin_crt2", "" }, \
160 { "darwin_subarch", DARWIN_SUBARCH_SPEC },
161
162/* The Darwin assembler mostly follows AT&T syntax. */
163#undef ASSEMBLER_DIALECT
164#define ASSEMBLER_DIALECT ASM_ATT
165
166/* Define macro used to output shift-double opcodes when the shift
167 count is in %cl. Some assemblers require %cl as an argument;
168 some don't. This macro controls what to do: by default, don't
169 print %cl. */
170
171#define SHIFT_DOUBLE_OMITS_COUNT 0
172
173#undef TARGET_ASM_FILE_END
174#define TARGET_ASM_FILE_END darwin_file_end
175
176/* Define the syntax of pseudo-ops, labels and comments. */
177
178/* String containing the assembler's comment-starter. */
179
180#define ASM_COMMENT_START "#"
181
182/* By default, target has a 80387, uses IEEE compatible arithmetic,
183 and returns float values in the 387. */
184
185#undef TARGET_SUBTARGET_DEFAULT
186#define TARGET_SUBTARGET_DEFAULT (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_128BIT_LONG_DOUBLE)
187
188/* For darwin we want to target specific processor features as a minimum,
189 but these unfortunately don't correspond to a specific processor. */
190#undef TARGET_SUBTARGET32_ISA_DEFAULT
191#define TARGET_SUBTARGET32_ISA_DEFAULT (OPTION_MASK_ISA_MMX \
192 | OPTION_MASK_ISA_SSE \
193 | OPTION_MASK_ISA_SSE2 \
194 | OPTION_MASK_ISA_SSE3)
195
196#undef TARGET_SUBTARGET64_ISA_DEFAULT
197#define TARGET_SUBTARGET64_ISA_DEFAULT TARGET_SUBTARGET32_ISA_DEFAULT
198
199#undef GOT_SYMBOL_NAME
200#define GOT_SYMBOL_NAME MACHOPIC_FUNCTION_BASE_NAME
201
202/* Define the syntax of pseudo-ops, labels and comments. */
203
204#define LPREFIX "L"
205
206/* Assembler pseudos to introduce constants of various size. */
207
208#define ASM_BYTE "\t.byte\t"
209#define ASM_SHORT "\t.word\t"
210#define ASM_LONG "\t.long\t"
211#define ASM_QUAD "\t.quad\t"
212
213#define SUBTARGET_ENCODE_SECTION_INFO darwin_encode_section_info
214
215#undef ASM_OUTPUT_ALIGN
216#define ASM_OUTPUT_ALIGN(FILE,LOG) \
217 do { if ((LOG) != 0) \
218 { \
219 if (in_section == text_section) \
220 fprintf (FILE, "\t%s %d,0x90\n", ALIGN_ASM_OP, (LOG)); \
221 else \
222 fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG)); \
223 } \
224 } while (0)
225
226/* Darwin profiling -- call mcount. */
227#undef FUNCTION_PROFILER
228#define FUNCTION_PROFILER(FILE, LABELNO) \
229 do { \
230 if (TARGET_MACHO_BRANCH_ISLANDS \
231 && MACHOPIC_INDIRECT && !TARGET_64BIT) \
232 { \
233 const char *name = machopic_mcount_stub_name (); \
234 fprintf (FILE, "\tcall %s\n", name+1); /* skip '&' */ \
235 machopic_validate_stub_or_non_lazy_ptr (name); \
236 } \
237 else fprintf (FILE, "\tcall mcount\n"); \
238 } while (0)
239
240#define C_COMMON_OVERRIDE_OPTIONS \
241 do { \
242 SUBTARGET_C_COMMON_OVERRIDE_OPTIONS; \
243 } while (0)
244
245#undef SUBTARGET_OVERRIDE_OPTIONS
246#define SUBTARGET_OVERRIDE_OPTIONS \
247do { \
248 if (TARGET_64BIT && MACHO_DYNAMIC_NO_PIC_P) \
249 target_flags &= ~MASK_MACHO_DYNAMIC_NO_PIC; \
250} while (0)
251
252/* Darwin on x86_64 uses dwarf-2 by default. Pre-darwin9 32-bit
253 compiles default to stabs+. darwin9+ defaults to dwarf-2. */
254#ifndef DARWIN_PREFER_DWARF
255#undef PREFERRED_DEBUGGING_TYPE
256#ifdef HAVE_AS_STABS_DIRECTIVE
257#define PREFERRED_DEBUGGING_TYPE (TARGET_64BIT ? DWARF2_DEBUG : DBX_DEBUG)
258#else
259#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
260#endif
261#endif
262
263/* Darwin uses the standard DWARF register numbers but the default
264 register numbers for STABS. Fortunately for 64-bit code the
265 default and the standard are the same. */
266#undef DBX_REGISTER_NUMBER
267#define DBX_REGISTER_NUMBER(n) \
268 (TARGET_64BIT ? dbx64_register_map[n] \
269 : write_symbols == DWARF2_DEBUG ? svr4_dbx_register_map[n] \
270 : dbx_register_map[n])
271
272/* Unfortunately, the 32-bit EH information also doesn't use the standard
273 DWARF register numbers. */
274#define DWARF2_FRAME_REG_OUT(n, for_eh) \
275 (! (for_eh) || write_symbols != DWARF2_DEBUG || TARGET_64BIT ? (n) \
276 : (n) == 5 ? 4 \
277 : (n) == 4 ? 5 \
278 : (n) >= 11 && (n) <= 18 ? (n) + 1 \
279 : (n))
280
281#undef REGISTER_SUBTARGET_PRAGMAS
282#define REGISTER_SUBTARGET_PRAGMAS() DARWIN_REGISTER_TARGET_PRAGMAS()
283
284#undef TARGET_SET_DEFAULT_TYPE_ATTRIBUTES
285#define TARGET_SET_DEFAULT_TYPE_ATTRIBUTES darwin_set_default_type_attributes
286
287/* For 64-bit, we need to add 4 because @GOTPCREL is relative to the
288 end of the instruction, but without the 4 we'd only have the right
289 address for the start of the instruction. */
290#undef ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX
291#define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(FILE, ENCODING, SIZE, ADDR, DONE) \
292 if (TARGET_64BIT) \
293 { \
294 if ((SIZE) == 4 && ((ENCODING) & 0x70) == DW_EH_PE_pcrel) \
295 { \
296 fputs (ASM_LONG, FILE); \
297 assemble_name (FILE, XSTR (ADDR, 0)); \
298 fputs ("+4@GOTPCREL", FILE); \
299 goto DONE; \
300 } \
301 } \
302 else \
303 { \
304 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) \
305 { \
306 darwin_non_lazy_pcrel (FILE, ADDR); \
307 goto DONE; \
308 } \
309 }
310
311/* This needs to move since i386 uses the first flag and other flags are
312 used in Mach-O. */
313#undef MACHO_SYMBOL_FLAG_VARIABLE
314#define MACHO_SYMBOL_FLAG_VARIABLE ((SYMBOL_FLAG_MACH_DEP) << 3)
315
316#undef MACHOPIC_NL_SYMBOL_PTR_SECTION
317#define MACHOPIC_NL_SYMBOL_PTR_SECTION \
318 ".section __IMPORT,__pointers,non_lazy_symbol_pointers"
319
320#define SUBTARGET32_DEFAULT_CPU "i686"
321
322#undef SUBTARGET_INIT_BUILTINS
323#define SUBTARGET_INIT_BUILTINS \
324do { \
325 ix86_builtins[(int) IX86_BUILTIN_CFSTRING] \
326 = darwin_init_cfstring_builtins ((unsigned) (IX86_BUILTIN_CFSTRING)); \
327 darwin_rename_builtins (); \
328} while(0)
329

Warning: That file was not part of the compilation database. It may have many parsing errors.