1 /* Target definitions for x86 running Darwin.
2 Copyright (C) 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2010, 2011
3 Free Software Foundation, Inc.
4 Contributed by Apple Computer Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
22 /* Enable Mach-O bits in generic x86 code. */
24 #define TARGET_MACHO 1
30 #define TARGET_64BIT OPTION_ISA_64BIT
35 #define TARGET_64BIT 1
37 #define TARGET_64BIT 0
41 /* Size of the Obj-C jump buffer. */
42 #define OBJC_JBLEN ((TARGET_64BIT) ? ((9 * 2) + 3 + 16) : (18))
44 #undef TARGET_FPMATH_DEFAULT
45 #define TARGET_FPMATH_DEFAULT (TARGET_SSE ? FPMATH_SSE : FPMATH_387)
47 #define TARGET_OS_CPP_BUILTINS() \
50 builtin_define ("__LITTLE_ENDIAN__"); \
51 darwin_cpp_builtins (pfile); \
56 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
59 #define WCHAR_TYPE "int"
61 #undef WCHAR_TYPE_SIZE
62 #define WCHAR_TYPE_SIZE 32
64 /* Generate branch islands stubs if this is true. */
65 extern int darwin_emit_branch_islands;
67 #undef TARGET_MACHO_BRANCH_ISLANDS
68 #define TARGET_MACHO_BRANCH_ISLANDS darwin_emit_branch_islands
70 /* For compatibility with OSX system tools, use the new style of pic stub
72 #undef MACHOPIC_ATT_STUB
73 #define MACHOPIC_ATT_STUB (darwin_macho_att_stub)
75 #undef MAX_BITS_PER_WORD
76 #define MAX_BITS_PER_WORD 64
78 #undef FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN
79 #define FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN (0)
81 #undef TARGET_KEEPS_VECTOR_ALIGNED_STACK
82 #define TARGET_KEEPS_VECTOR_ALIGNED_STACK 1
84 /* On Darwin, the stack is 128-bit aligned at the point of every call.
85 Failure to ensure this will lead to a crash in the system libraries
88 #define STACK_BOUNDARY \
89 ((profile_flag || (TARGET_64BIT && ix86_abi == MS_ABI)) \
90 ? 128 : BITS_PER_WORD)
92 #undef MAIN_STACK_BOUNDARY
93 #define MAIN_STACK_BOUNDARY 128
95 /* Since we'll never want a stack boundary less aligned than 128 bits
96 we need the extra work here otherwise bits of gcc get very grumpy
97 when we ask for lower alignment. We could just reject values less
98 than 128 bits for Darwin, but it's easier to up the alignment if
99 it's below the minimum. */
100 #undef PREFERRED_STACK_BOUNDARY
101 #define PREFERRED_STACK_BOUNDARY \
102 MAX (128, ix86_preferred_stack_boundary)
104 /* We want -fPIC by default, unless we're using -static to compile for
105 the kernel or some such. */
108 #define CC1_SPEC "%(cc1_cpu) \
109 %{!mkernel:%{!static:%{!mdynamic-no-pic:-fPIC}}} \
110 %{!mmacosx-version-min=*:-mmacosx-version-min=%(darwin_minversion)} \
111 %{g: %{!fno-eliminate-unused-debug-symbols: -feliminate-unused-debug-symbols }} " \
115 #define ASM_SPEC "-arch %(darwin_arch) -force_cpusubtype_ALL \
118 #define DARWIN_ARCH_SPEC "%{m64:x86_64;:i386}"
119 #define DARWIN_SUBARCH_SPEC DARWIN_ARCH_SPEC
121 /* Determine a minimum version based on compiler options. */
122 #define DARWIN_MINVERSION_SPEC \
123 "%{!m64|fgnu-runtime:10.4; \
124 ,objective-c|,objc-cpp-output:10.5; \
125 ,objective-c-header:10.5; \
126 ,objective-c++|,objective-c++-cpp-output:10.5; \
127 ,objective-c++-header|,objc++-cpp-output:10.5; \
131 #define ENDFILE_SPEC \
132 "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
133 %{mpc32:crtprec32.o%s} \
134 %{mpc64:crtprec64.o%s} \
135 %{mpc80:crtprec80.o%s} \
136 %{fgnu-tm: -lcrttme.o}"
138 #undef SUBTARGET_EXTRA_SPECS
139 #define SUBTARGET_EXTRA_SPECS \
141 { "darwin_arch", DARWIN_ARCH_SPEC }, \
142 { "darwin_crt2", "" }, \
143 { "darwin_subarch", DARWIN_SUBARCH_SPEC },
145 /* The Darwin assembler mostly follows AT&T syntax. */
146 #undef ASSEMBLER_DIALECT
147 #define ASSEMBLER_DIALECT ASM_ATT
149 /* Define macro used to output shift-double opcodes when the shift
150 count is in %cl. Some assemblers require %cl as an argument;
151 some don't. This macro controls what to do: by default, don't
154 #define SHIFT_DOUBLE_OMITS_COUNT 0
156 /* Put all *tf routines in libgcc. */
157 #undef LIBGCC2_HAS_TF_MODE
158 #define LIBGCC2_HAS_TF_MODE 1
159 #define LIBGCC2_TF_CEXT q
162 #undef TARGET_ASM_FILE_END
163 #define TARGET_ASM_FILE_END darwin_file_end
165 /* Define the syntax of pseudo-ops, labels and comments. */
167 /* String containing the assembler's comment-starter. */
169 #define ASM_COMMENT_START "#"
171 /* By default, target has a 80387, uses IEEE compatible arithmetic,
172 and returns float values in the 387. */
174 #undef TARGET_SUBTARGET_DEFAULT
175 #define TARGET_SUBTARGET_DEFAULT (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_128BIT_LONG_DOUBLE)
177 /* For darwin we want to target specific processor features as a minimum,
178 but these unfortunately don't correspond to a specific processor. */
179 #undef TARGET_SUBTARGET32_ISA_DEFAULT
180 #define TARGET_SUBTARGET32_ISA_DEFAULT (OPTION_MASK_ISA_MMX \
181 | OPTION_MASK_ISA_SSE \
182 | OPTION_MASK_ISA_SSE2 \
183 | OPTION_MASK_ISA_SSE3)
185 #undef TARGET_SUBTARGET64_ISA_DEFAULT
186 #define TARGET_SUBTARGET64_ISA_DEFAULT TARGET_SUBTARGET32_ISA_DEFAULT
188 #undef GOT_SYMBOL_NAME
189 #define GOT_SYMBOL_NAME MACHOPIC_FUNCTION_BASE_NAME
191 /* Define the syntax of pseudo-ops, labels and comments. */
195 /* Assembler pseudos to introduce constants of various size. */
197 #define ASM_BYTE "\t.byte\t"
198 #define ASM_SHORT "\t.word\t"
199 #define ASM_LONG "\t.long\t"
200 #define ASM_QUAD "\t.quad\t"
202 #define SUBTARGET_ENCODE_SECTION_INFO darwin_encode_section_info
204 #undef ASM_OUTPUT_ALIGN
205 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
206 do { if ((LOG) != 0) \
208 if (in_section == text_section) \
209 fprintf (FILE, "\t%s %d,0x90\n", ALIGN_ASM_OP, (LOG)); \
211 fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG)); \
215 /* Darwin profiling -- call mcount. */
216 #undef FUNCTION_PROFILER
217 #define FUNCTION_PROFILER(FILE, LABELNO) \
219 if (TARGET_MACHO_BRANCH_ISLANDS \
220 && MACHOPIC_INDIRECT && !TARGET_64BIT) \
222 const char *name = machopic_mcount_stub_name (); \
223 fprintf (FILE, "\tcall %s\n", name+1); /* skip '&' */ \
224 machopic_validate_stub_or_non_lazy_ptr (name); \
226 else fprintf (FILE, "\tcall mcount\n"); \
229 #define C_COMMON_OVERRIDE_OPTIONS \
231 SUBTARGET_C_COMMON_OVERRIDE_OPTIONS; \
234 #undef SUBTARGET_OVERRIDE_OPTIONS
235 #define SUBTARGET_OVERRIDE_OPTIONS \
237 if (TARGET_64BIT && MACHO_DYNAMIC_NO_PIC_P) \
238 target_flags &= ~MASK_MACHO_DYNAMIC_NO_PIC; \
241 /* Darwin on x86_64 uses dwarf-2 by default. Pre-darwin9 32-bit
242 compiles default to stabs+. darwin9+ defaults to dwarf-2. */
243 #ifndef DARWIN_PREFER_DWARF
244 #undef PREFERRED_DEBUGGING_TYPE
245 #define PREFERRED_DEBUGGING_TYPE (TARGET_64BIT ? DWARF2_DEBUG : DBX_DEBUG)
248 /* Darwin uses the standard DWARF register numbers but the default
249 register numbers for STABS. Fortunately for 64-bit code the
250 default and the standard are the same. */
251 #undef DBX_REGISTER_NUMBER
252 #define DBX_REGISTER_NUMBER(n) \
253 (TARGET_64BIT ? dbx64_register_map[n] \
254 : write_symbols == DWARF2_DEBUG ? svr4_dbx_register_map[n] \
255 : dbx_register_map[n])
257 /* Unfortunately, the 32-bit EH information also doesn't use the standard
258 DWARF register numbers. */
259 #define DWARF2_FRAME_REG_OUT(n, for_eh) \
260 (! (for_eh) || write_symbols != DWARF2_DEBUG || TARGET_64BIT ? (n) \
263 : (n) >= 11 && (n) <= 18 ? (n) + 1 \
266 #undef REGISTER_SUBTARGET_PRAGMAS
267 #define REGISTER_SUBTARGET_PRAGMAS() DARWIN_REGISTER_TARGET_PRAGMAS()
269 #undef TARGET_SET_DEFAULT_TYPE_ATTRIBUTES
270 #define TARGET_SET_DEFAULT_TYPE_ATTRIBUTES darwin_set_default_type_attributes
272 /* For 64-bit, we need to add 4 because @GOTPCREL is relative to the
273 end of the instruction, but without the 4 we'd only have the right
274 address for the start of the instruction. */
275 #undef ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX
276 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(FILE, ENCODING, SIZE, ADDR, DONE) \
279 if ((SIZE) == 4 && ((ENCODING) & 0x70) == DW_EH_PE_pcrel) \
281 fputs (ASM_LONG, FILE); \
282 assemble_name (FILE, XSTR (ADDR, 0)); \
283 fputs ("+4@GOTPCREL", FILE); \
289 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) \
291 darwin_non_lazy_pcrel (FILE, ADDR); \
296 /* This needs to move since i386 uses the first flag and other flags are
298 #undef MACHO_SYMBOL_FLAG_VARIABLE
299 #define MACHO_SYMBOL_FLAG_VARIABLE ((SYMBOL_FLAG_MACH_DEP) << 3)
301 #undef MACHOPIC_NL_SYMBOL_PTR_SECTION
302 #define MACHOPIC_NL_SYMBOL_PTR_SECTION \
303 ".section __IMPORT,__pointers,non_lazy_symbol_pointers"
305 #define SUBTARGET32_DEFAULT_CPU "i686"
307 #undef SUBTARGET_INIT_BUILTINS
308 #define SUBTARGET_INIT_BUILTINS \
310 ix86_builtins[(int) IX86_BUILTIN_CFSTRING] \
311 = darwin_init_cfstring_builtins ((unsigned) (IX86_BUILTIN_CFSTRING)); \
312 darwin_rename_builtins (); \