1 /* Target definitions for x86 running Darwin.
2 Copyright (C) 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2010
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
29 #define TARGET_VERSION fprintf (stderr, " (i686 Darwin)");
32 #define TARGET_64BIT OPTION_ISA_64BIT
37 #define TARGET_64BIT 1
39 #define TARGET_64BIT 0
43 /* Size of the Obj-C jump buffer. */
44 #define OBJC_JBLEN ((TARGET_64BIT) ? ((9 * 2) + 3 + 16) : (18))
46 #undef TARGET_FPMATH_DEFAULT
47 #define TARGET_FPMATH_DEFAULT (TARGET_SSE ? FPMATH_SSE : FPMATH_387)
49 #define TARGET_OS_CPP_BUILTINS() \
52 builtin_define ("__LITTLE_ENDIAN__"); \
53 darwin_cpp_builtins (pfile); \
58 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
61 #define WCHAR_TYPE "int"
63 #undef WCHAR_TYPE_SIZE
64 #define WCHAR_TYPE_SIZE 32
66 /* Generate branch islands stubs if this is true. */
67 extern int darwin_emit_branch_islands;
69 #undef TARGET_MACHO_BRANCH_ISLANDS
70 #define TARGET_MACHO_BRANCH_ISLANDS darwin_emit_branch_islands
72 /* For compatibility with OSX system tools, use the new style of pic stub
74 #undef MACHOPIC_ATT_STUB
75 #define MACHOPIC_ATT_STUB (darwin_macho_att_stub)
77 #undef MAX_BITS_PER_WORD
78 #define MAX_BITS_PER_WORD 64
80 #undef FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN
81 #define FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN (0)
83 #undef TARGET_KEEPS_VECTOR_ALIGNED_STACK
84 #define TARGET_KEEPS_VECTOR_ALIGNED_STACK 1
86 /* On Darwin, the stack is 128-bit aligned at the point of every call.
87 Failure to ensure this will lead to a crash in the system libraries
90 #define STACK_BOUNDARY \
91 ((profile_flag || (TARGET_64BIT && ix86_abi == MS_ABI)) \
92 ? 128 : BITS_PER_WORD)
94 #undef MAIN_STACK_BOUNDARY
95 #define MAIN_STACK_BOUNDARY 128
97 /* Since we'll never want a stack boundary less aligned than 128 bits
98 we need the extra work here otherwise bits of gcc get very grumpy
99 when we ask for lower alignment. We could just reject values less
100 than 128 bits for Darwin, but it's easier to up the alignment if
101 it's below the minimum. */
102 #undef PREFERRED_STACK_BOUNDARY
103 #define PREFERRED_STACK_BOUNDARY \
104 MAX (128, ix86_preferred_stack_boundary)
106 /* We want -fPIC by default, unless we're using -static to compile for
107 the kernel or some such. */
110 #define CC1_SPEC "%(cc1_cpu) \
111 %{!mkernel:%{!static:%{!mdynamic-no-pic:-fPIC}}} \
112 %{!mmacosx-version-min=*:-mmacosx-version-min=%(darwin_minversion)} \
113 %{g: %{!fno-eliminate-unused-debug-symbols: -feliminate-unused-debug-symbols }} " \
117 #define ASM_SPEC "-arch %(darwin_arch) -force_cpusubtype_ALL \
120 #define DARWIN_ARCH_SPEC "%{m64:x86_64;:i386}"
121 #define DARWIN_SUBARCH_SPEC DARWIN_ARCH_SPEC
123 /* Determine a minimum version based on compiler options. */
124 #define DARWIN_MINVERSION_SPEC \
125 "%{!m64|fgnu-runtime:10.4; \
126 ,objective-c|,objc-cpp-output:10.5; \
127 ,objective-c-header:10.5; \
128 ,objective-c++|,objective-c++-cpp-output:10.5; \
129 ,objective-c++-header|,objc++-cpp-output:10.5; \
133 #define ENDFILE_SPEC \
134 "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
135 %{mpc32:crtprec32.o%s} \
136 %{mpc64:crtprec64.o%s} \
137 %{mpc80:crtprec80.o%s}"
139 #undef SUBTARGET_EXTRA_SPECS
140 #define SUBTARGET_EXTRA_SPECS \
142 { "darwin_arch", DARWIN_ARCH_SPEC }, \
143 { "darwin_crt2", "" }, \
144 { "darwin_subarch", DARWIN_SUBARCH_SPEC },
146 /* The Darwin assembler mostly follows AT&T syntax. */
147 #undef ASSEMBLER_DIALECT
148 #define ASSEMBLER_DIALECT ASM_ATT
150 /* Define macro used to output shift-double opcodes when the shift
151 count is in %cl. Some assemblers require %cl as an argument;
152 some don't. This macro controls what to do: by default, don't
155 #define SHIFT_DOUBLE_OMITS_COUNT 0
157 /* Put all *tf routines in libgcc. */
158 #undef LIBGCC2_HAS_TF_MODE
159 #define LIBGCC2_HAS_TF_MODE 1
160 #define LIBGCC2_TF_CEXT q
163 #undef TARGET_ASM_FILE_END
164 #define TARGET_ASM_FILE_END darwin_file_end
166 /* Define the syntax of pseudo-ops, labels and comments. */
168 /* String containing the assembler's comment-starter. */
170 #define ASM_COMMENT_START "#"
172 /* By default, target has a 80387, uses IEEE compatible arithmetic,
173 and returns float values in the 387. */
175 #undef TARGET_SUBTARGET_DEFAULT
176 #define TARGET_SUBTARGET_DEFAULT (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_128BIT_LONG_DOUBLE)
178 /* For darwin we want to target specific processor features as a minimum,
179 but these unfortunately don't correspond to a specific processor. */
180 #undef TARGET_SUBTARGET32_ISA_DEFAULT
181 #define TARGET_SUBTARGET32_ISA_DEFAULT (OPTION_MASK_ISA_MMX \
182 | OPTION_MASK_ISA_SSE \
183 | OPTION_MASK_ISA_SSE2 \
184 | OPTION_MASK_ISA_SSE3)
186 #undef TARGET_SUBTARGET64_ISA_DEFAULT
187 #define TARGET_SUBTARGET64_ISA_DEFAULT TARGET_SUBTARGET32_ISA_DEFAULT
189 #undef GOT_SYMBOL_NAME
190 #define GOT_SYMBOL_NAME MACHOPIC_FUNCTION_BASE_NAME
192 /* Define the syntax of pseudo-ops, labels and comments. */
196 /* Assembler pseudos to introduce constants of various size. */
198 #define ASM_BYTE "\t.byte\t"
199 #define ASM_SHORT "\t.word\t"
200 #define ASM_LONG "\t.long\t"
201 #define ASM_QUAD "\t.quad\t"
203 #define SUBTARGET_ENCODE_SECTION_INFO darwin_encode_section_info
205 #undef ASM_OUTPUT_ALIGN
206 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
207 do { if ((LOG) != 0) \
209 if (in_section == text_section) \
210 fprintf (FILE, "\t%s %d,0x90\n", ALIGN_ASM_OP, (LOG)); \
212 fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG)); \
216 /* Darwin profiling -- call mcount. */
217 #undef FUNCTION_PROFILER
218 #define FUNCTION_PROFILER(FILE, LABELNO) \
220 if (TARGET_MACHO_BRANCH_ISLANDS \
221 && MACHOPIC_INDIRECT && !TARGET_64BIT) \
223 const char *name = machopic_mcount_stub_name (); \
224 fprintf (FILE, "\tcall %s\n", name+1); /* skip '&' */ \
225 machopic_validate_stub_or_non_lazy_ptr (name); \
227 else fprintf (FILE, "\tcall mcount\n"); \
230 #define C_COMMON_OVERRIDE_OPTIONS \
232 SUBTARGET_C_COMMON_OVERRIDE_OPTIONS; \
235 #undef SUBTARGET_OVERRIDE_OPTIONS
236 #define SUBTARGET_OVERRIDE_OPTIONS \
238 if (TARGET_64BIT && MACHO_DYNAMIC_NO_PIC_P) \
239 target_flags &= ~MASK_MACHO_DYNAMIC_NO_PIC; \
242 /* Darwin on x86_64 uses dwarf-2 by default. Pre-darwin9 32-bit
243 compiles default to stabs+. darwin9+ defaults to dwarf-2. */
244 #ifndef DARWIN_PREFER_DWARF
245 #undef PREFERRED_DEBUGGING_TYPE
246 #define PREFERRED_DEBUGGING_TYPE (TARGET_64BIT ? DWARF2_DEBUG : DBX_DEBUG)
249 /* Darwin uses the standard DWARF register numbers but the default
250 register numbers for STABS. Fortunately for 64-bit code the
251 default and the standard are the same. */
252 #undef DBX_REGISTER_NUMBER
253 #define DBX_REGISTER_NUMBER(n) \
254 (TARGET_64BIT ? dbx64_register_map[n] \
255 : write_symbols == DWARF2_DEBUG ? svr4_dbx_register_map[n] \
256 : dbx_register_map[n])
258 /* Unfortunately, the 32-bit EH information also doesn't use the standard
259 DWARF register numbers. */
260 #define DWARF2_FRAME_REG_OUT(n, for_eh) \
261 (! (for_eh) || write_symbols != DWARF2_DEBUG || TARGET_64BIT ? (n) \
264 : (n) >= 11 && (n) <= 18 ? (n) + 1 \
267 #undef REGISTER_SUBTARGET_PRAGMAS
268 #define REGISTER_SUBTARGET_PRAGMAS() DARWIN_REGISTER_TARGET_PRAGMAS()
270 #undef TARGET_SET_DEFAULT_TYPE_ATTRIBUTES
271 #define TARGET_SET_DEFAULT_TYPE_ATTRIBUTES darwin_set_default_type_attributes
273 /* For 64-bit, we need to add 4 because @GOTPCREL is relative to the
274 end of the instruction, but without the 4 we'd only have the right
275 address for the start of the instruction. */
276 #undef ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX
277 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(FILE, ENCODING, SIZE, ADDR, DONE) \
280 if ((SIZE) == 4 && ((ENCODING) & 0x70) == DW_EH_PE_pcrel) \
282 fputs (ASM_LONG, FILE); \
283 assemble_name (FILE, XSTR (ADDR, 0)); \
284 fputs ("+4@GOTPCREL", FILE); \
290 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) \
292 darwin_non_lazy_pcrel (FILE, ADDR); \
297 /* This needs to move since i386 uses the first flag and other flags are
299 #undef MACHO_SYMBOL_FLAG_VARIABLE
300 #define MACHO_SYMBOL_FLAG_VARIABLE ((SYMBOL_FLAG_MACH_DEP) << 3)
302 #undef MACHOPIC_NL_SYMBOL_PTR_SECTION
303 #define MACHOPIC_NL_SYMBOL_PTR_SECTION \
304 ".section __IMPORT,__pointers,non_lazy_symbol_pointers"
306 #define SUBTARGET32_DEFAULT_CPU "i686"
308 #undef SUBTARGET_INIT_BUILTINS
309 #define SUBTARGET_INIT_BUILTINS \
311 darwin_init_cfstring_builtins ((unsigned) (IX86_BUILTIN_MAX));\