1 /* Target definitions for x86 running Darwin.
2 Copyright (C) 2001, 2002, 2004, 2005 Free Software Foundation, Inc.
3 Contributed by Apple Computer Inc.
5 This file is part of GCC.
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 2, or (at your option)
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.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to
19 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA. */
22 /* Enable Mach-O bits in generic x86 code. */
24 #define TARGET_MACHO 1
26 #define TARGET_VERSION fprintf (stderr, " (i686 Darwin)");
29 #define TARGET_64BIT (target_flags & MASK_64BIT)
34 #define TARGET_64BIT 1
36 #define TARGET_64BIT 0
40 /* Size of the Obj-C jump buffer. */
41 #define OBJC_JBLEN ((TARGET_64BIT) ? ((9 * 2) + 3 + 16) : (18))
43 #undef TARGET_FPMATH_DEFAULT
44 #define TARGET_FPMATH_DEFAULT (TARGET_SSE ? FPMATH_SSE : FPMATH_387)
46 #define TARGET_OS_CPP_BUILTINS() \
49 builtin_define ("__LITTLE_ENDIAN__"); \
50 darwin_cpp_builtins (pfile); \
55 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
58 #define WCHAR_TYPE "int"
60 #undef WCHAR_TYPE_SIZE
61 #define WCHAR_TYPE_SIZE 32
63 #undef MAX_BITS_PER_WORD
64 #define MAX_BITS_PER_WORD 64
66 #undef FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN
67 #define FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN (0)
69 /* We want -fPIC by default, unless we're using -static to compile for
70 the kernel or some such. */
73 #define CC1_SPEC "%{!mkernel:%{!static:%{!mdynamic-no-pic:-fPIC}}} \
74 %{g: %{!fno-eliminate-unused-debug-symbols: -feliminate-unused-debug-symbols }}"
77 #define ASM_SPEC "-arch %(darwin_arch) -force_cpusubtype_ALL"
79 #define DARWIN_ARCH_SPEC "%{m64:x86_64;:i386}"
80 #define DARWIN_SUBARCH_SPEC DARWIN_ARCH_SPEC
82 #undef SUBTARGET_EXTRA_SPECS
83 #define SUBTARGET_EXTRA_SPECS \
84 { "darwin_arch", DARWIN_ARCH_SPEC }, \
85 { "darwin_crt2", "" }, \
86 { "darwin_subarch", DARWIN_SUBARCH_SPEC },
88 /* Use the following macro for any Darwin/x86-specific command-line option
90 #define SUBTARGET_OPTION_TRANSLATE_TABLE \
93 /* The Darwin assembler mostly follows AT&T syntax. */
94 #undef ASSEMBLER_DIALECT
95 #define ASSEMBLER_DIALECT ASM_ATT
97 /* Define macro used to output shift-double opcodes when the shift
98 count is in %cl. Some assemblers require %cl as an argument;
99 some don't. This macro controls what to do: by default, don't
102 #define SHIFT_DOUBLE_OMITS_COUNT 0
104 extern void darwin_x86_file_end (void);
105 #undef TARGET_ASM_FILE_END
106 #define TARGET_ASM_FILE_END darwin_x86_file_end
108 /* Define the syntax of pseudo-ops, labels and comments. */
110 /* String containing the assembler's comment-starter. */
112 #define ASM_COMMENT_START "#"
114 /* By default, target has a 80387, uses IEEE compatible arithmetic,
115 and returns float values in the 387. */
117 #define TARGET_SUBTARGET_DEFAULT (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_128BIT_LONG_DOUBLE)
119 /* For now, disable dynamic-no-pic. We'll need to go through i386.c
120 with a fine-tooth comb looking for refs to flag_pic! */
121 #define MASK_MACHO_DYNAMIC_NO_PIC 0
122 #define TARGET_DYNAMIC_NO_PIC (target_flags & MASK_MACHO_DYNAMIC_NO_PIC)
124 #undef GOT_SYMBOL_NAME
125 #define GOT_SYMBOL_NAME (machopic_function_base_name ())
127 /* Define the syntax of pseudo-ops, labels and comments. */
131 /* These are used by -fbranch-probabilities */
132 #define HOT_TEXT_SECTION_NAME "__TEXT,__text,regular,pure_instructions"
133 #define UNLIKELY_EXECUTED_TEXT_SECTION_NAME \
134 "__TEXT,__unlikely,regular,pure_instructions"
136 /* Assembler pseudos to introduce constants of various size. */
138 #define ASM_BYTE_OP "\t.byte\t"
139 #define ASM_SHORT "\t.word\t"
140 #define ASM_LONG "\t.long\t"
141 #define ASM_QUAD "\t.quad\t"
143 #define SUBTARGET_ENCODE_SECTION_INFO darwin_encode_section_info
145 #undef ASM_OUTPUT_ALIGN
146 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
147 do { if ((LOG) != 0) \
149 if (in_section == text_section) \
150 fprintf (FILE, "\t%s %d,0x90\n", ALIGN_ASM_OP, (LOG)); \
152 fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG)); \
156 /* This says how to output an assembler line
157 to define a global common symbol. */
159 #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
160 ( fputs (".comm ", (FILE)), \
161 assemble_name ((FILE), (NAME)), \
162 fprintf ((FILE), ",%lu\n", (unsigned long)(ROUNDED)))
164 /* This says how to output an assembler line
165 to define a local common symbol. */
167 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
168 ( fputs (".lcomm ", (FILE)), \
169 assemble_name ((FILE), (NAME)), \
170 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED"\n", (ROUNDED)))
172 /* Darwin profiling -- call mcount. */
173 #undef FUNCTION_PROFILER
174 #define FUNCTION_PROFILER(FILE, LABELNO) \
176 if (MACHOPIC_INDIRECT && !TARGET_64BIT) \
178 const char *name = machopic_mcount_stub_name (); \
179 fprintf (FILE, "\tcall %s\n", name+1); /* skip '&' */ \
180 machopic_validate_stub_or_non_lazy_ptr (name); \
182 else fprintf (FILE, "\tcall mcount\n"); \
185 #define C_COMMON_OVERRIDE_OPTIONS \
187 SUBTARGET_C_COMMON_OVERRIDE_OPTIONS; \
190 /* Darwin on x86_64 uses dwarf-2 by default. */
191 #undef PREFERRED_DEBUGGING_TYPE
192 #define PREFERRED_DEBUGGING_TYPE (TARGET_64BIT ? DWARF2_DEBUG : DBX_DEBUG)
194 /* Darwin uses the standard DWARF register numbers but the default
195 register numbers for STABS. Fortunately for 64-bit code the
196 default and the standard are the same. */
197 #undef DBX_REGISTER_NUMBER
198 #define DBX_REGISTER_NUMBER(n) \
199 (TARGET_64BIT ? dbx64_register_map[n] \
200 : write_symbols == DWARF2_DEBUG ? svr4_dbx_register_map[n] \
201 : dbx_register_map[n])
203 /* Unfortunately, the 32-bit EH information also doesn't use the standard
204 DWARF register numbers. */
205 #define DWARF2_FRAME_REG_OUT(n, for_eh) \
206 (! (for_eh) || write_symbols != DWARF2_DEBUG || TARGET_64BIT ? (n) \
209 : (n) >= 11 && (n) <= 18 ? (n) + 1 \
212 #undef REGISTER_TARGET_PRAGMAS
213 #define REGISTER_TARGET_PRAGMAS() DARWIN_REGISTER_TARGET_PRAGMAS()
215 #undef TARGET_SET_DEFAULT_TYPE_ATTRIBUTES
216 #define TARGET_SET_DEFAULT_TYPE_ATTRIBUTES darwin_set_default_type_attributes
218 /* For 64-bit, we need to add 4 because @GOTPCREL is relative to the
219 end of the instruction, but without the 4 we'd only have the right
220 address for the start of the instruction. */
221 #undef ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX
222 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(FILE, ENCODING, SIZE, ADDR, DONE) \
225 if ((SIZE) == 4 && ((ENCODING) & 0x70) == DW_EH_PE_pcrel) \
227 fputs (ASM_LONG, FILE); \
228 assemble_name (FILE, XSTR (ADDR, 0)); \
229 fputs ("+4@GOTPCREL", FILE); \
235 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) \
237 darwin_non_lazy_pcrel (FILE, ADDR); \
242 /* This needs to move since i386 uses the first flag and other flags are
244 #undef MACHO_SYMBOL_FLAG_VARIABLE
245 #define MACHO_SYMBOL_FLAG_VARIABLE ((SYMBOL_FLAG_MACH_DEP) << 3)