1117395Skan/* Target definitions for x86 running Darwin. 2169689Skan Copyright (C) 2001, 2002, 2004, 2005 Free Software Foundation, Inc. 3117395Skan Contributed by Apple Computer Inc. 4117395Skan 5132718SkanThis file is part of GCC. 6117395Skan 7132718SkanGCC is free software; you can redistribute it and/or modify 8117395Skanit under the terms of the GNU General Public License as published by 9117395Skanthe Free Software Foundation; either version 2, or (at your option) 10117395Skanany later version. 11117395Skan 12132718SkanGCC is distributed in the hope that it will be useful, 13117395Skanbut WITHOUT ANY WARRANTY; without even the implied warranty of 14117395SkanMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15117395SkanGNU General Public License for more details. 16117395Skan 17117395SkanYou should have received a copy of the GNU General Public License 18132718Skanalong with GCC; see the file COPYING. If not, write to 19169689Skanthe Free Software Foundation, 51 Franklin Street, Fifth Floor, 20169689SkanBoston, MA 02110-1301, USA. */ 21117395Skan 22117395Skan/* Enable Mach-O bits in generic x86 code. */ 23117395Skan#undef TARGET_MACHO 24117395Skan#define TARGET_MACHO 1 25117395Skan 26169689Skan#define TARGET_VERSION fprintf (stderr, " (i686 Darwin)"); 27117395Skan 28169689Skan#undef TARGET_64BIT 29169689Skan#define TARGET_64BIT (target_flags & MASK_64BIT) 30169689Skan 31169689Skan#ifdef IN_LIBGCC2 32169689Skan#undef TARGET_64BIT 33169689Skan#ifdef __x86_64__ 34169689Skan#define TARGET_64BIT 1 35169689Skan#else 36169689Skan#define TARGET_64BIT 0 37169689Skan#endif 38169689Skan#endif 39169689Skan 40169689Skan/* Size of the Obj-C jump buffer. */ 41169689Skan#define OBJC_JBLEN ((TARGET_64BIT) ? ((9 * 2) + 3 + 16) : (18)) 42169689Skan 43169689Skan#undef TARGET_FPMATH_DEFAULT 44169689Skan#define TARGET_FPMATH_DEFAULT (TARGET_SSE ? FPMATH_SSE : FPMATH_387) 45169689Skan 46117395Skan#define TARGET_OS_CPP_BUILTINS() \ 47117395Skan do \ 48117395Skan { \ 49117395Skan builtin_define ("__LITTLE_ENDIAN__"); \ 50169689Skan darwin_cpp_builtins (pfile); \ 51117395Skan } \ 52117395Skan while (0) 53117395Skan 54169689Skan#undef PTRDIFF_TYPE 55169689Skan#define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int") 56169689Skan 57169689Skan#undef WCHAR_TYPE 58169689Skan#define WCHAR_TYPE "int" 59169689Skan 60169689Skan#undef WCHAR_TYPE_SIZE 61169689Skan#define WCHAR_TYPE_SIZE 32 62169689Skan 63169689Skan#undef MAX_BITS_PER_WORD 64169689Skan#define MAX_BITS_PER_WORD 64 65169689Skan 66169689Skan#undef FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN 67169689Skan#define FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN (0) 68169689Skan 69117395Skan/* We want -fPIC by default, unless we're using -static to compile for 70117395Skan the kernel or some such. */ 71117395Skan 72117395Skan#undef CC1_SPEC 73169689Skan#define CC1_SPEC "%{!mkernel:%{!static:%{!mdynamic-no-pic:-fPIC}}} \ 74169689Skan %{g: %{!fno-eliminate-unused-debug-symbols: -feliminate-unused-debug-symbols }}" 75117395Skan 76169689Skan#undef ASM_SPEC 77169689Skan#define ASM_SPEC "-arch %(darwin_arch) -force_cpusubtype_ALL" 78146895Skan 79169689Skan#define DARWIN_ARCH_SPEC "%{m64:x86_64;:i386}" 80169689Skan#define DARWIN_SUBARCH_SPEC DARWIN_ARCH_SPEC 81132718Skan 82132718Skan#undef SUBTARGET_EXTRA_SPECS 83169689Skan#define SUBTARGET_EXTRA_SPECS \ 84169689Skan { "darwin_arch", DARWIN_ARCH_SPEC }, \ 85169689Skan { "darwin_crt2", "" }, \ 86169689Skan { "darwin_subarch", DARWIN_SUBARCH_SPEC }, 87132718Skan 88169689Skan/* Use the following macro for any Darwin/x86-specific command-line option 89169689Skan translation. */ 90169689Skan#define SUBTARGET_OPTION_TRANSLATE_TABLE \ 91169689Skan { "", "" } 92169689Skan 93117395Skan/* The Darwin assembler mostly follows AT&T syntax. */ 94117395Skan#undef ASSEMBLER_DIALECT 95117395Skan#define ASSEMBLER_DIALECT ASM_ATT 96117395Skan 97117395Skan/* Define macro used to output shift-double opcodes when the shift 98117395Skan count is in %cl. Some assemblers require %cl as an argument; 99117395Skan some don't. This macro controls what to do: by default, don't 100117395Skan print %cl. */ 101117395Skan 102117395Skan#define SHIFT_DOUBLE_OMITS_COUNT 0 103117395Skan 104169689Skanextern void darwin_x86_file_end (void); 105169689Skan#undef TARGET_ASM_FILE_END 106169689Skan#define TARGET_ASM_FILE_END darwin_x86_file_end 107169689Skan 108117395Skan/* Define the syntax of pseudo-ops, labels and comments. */ 109117395Skan 110117395Skan/* String containing the assembler's comment-starter. */ 111117395Skan 112117395Skan#define ASM_COMMENT_START "#" 113117395Skan 114117395Skan/* By default, target has a 80387, uses IEEE compatible arithmetic, 115117395Skan and returns float values in the 387. */ 116117395Skan 117169689Skan#define TARGET_SUBTARGET_DEFAULT (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_128BIT_LONG_DOUBLE) 118117395Skan 119132718Skan/* For now, disable dynamic-no-pic. We'll need to go through i386.c 120132718Skan with a fine-tooth comb looking for refs to flag_pic! */ 121132718Skan#define MASK_MACHO_DYNAMIC_NO_PIC 0 122132718Skan#define TARGET_DYNAMIC_NO_PIC (target_flags & MASK_MACHO_DYNAMIC_NO_PIC) 123132718Skan 124169689Skan#undef GOT_SYMBOL_NAME 125169689Skan#define GOT_SYMBOL_NAME (machopic_function_base_name ()) 126169689Skan 127117395Skan/* Define the syntax of pseudo-ops, labels and comments. */ 128117395Skan 129117395Skan#define LPREFIX "L" 130117395Skan 131169689Skan/* These are used by -fbranch-probabilities */ 132169689Skan#define HOT_TEXT_SECTION_NAME "__TEXT,__text,regular,pure_instructions" 133169689Skan#define UNLIKELY_EXECUTED_TEXT_SECTION_NAME \ 134169689Skan "__TEXT,__unlikely,regular,pure_instructions" 135169689Skan 136117395Skan/* Assembler pseudos to introduce constants of various size. */ 137117395Skan 138117395Skan#define ASM_BYTE_OP "\t.byte\t" 139117395Skan#define ASM_SHORT "\t.word\t" 140117395Skan#define ASM_LONG "\t.long\t" 141169689Skan#define ASM_QUAD "\t.quad\t" 142117395Skan 143169689Skan#define SUBTARGET_ENCODE_SECTION_INFO darwin_encode_section_info 144169689Skan 145117395Skan#undef ASM_OUTPUT_ALIGN 146117395Skan#define ASM_OUTPUT_ALIGN(FILE,LOG) \ 147117395Skan do { if ((LOG) != 0) \ 148117395Skan { \ 149169689Skan if (in_section == text_section) \ 150117395Skan fprintf (FILE, "\t%s %d,0x90\n", ALIGN_ASM_OP, (LOG)); \ 151117395Skan else \ 152117395Skan fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG)); \ 153117395Skan } \ 154117395Skan } while (0) 155117395Skan 156117395Skan/* This says how to output an assembler line 157117395Skan to define a global common symbol. */ 158117395Skan 159117395Skan#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \ 160117395Skan( fputs (".comm ", (FILE)), \ 161117395Skan assemble_name ((FILE), (NAME)), \ 162132718Skan fprintf ((FILE), ",%lu\n", (unsigned long)(ROUNDED))) 163117395Skan 164117395Skan/* This says how to output an assembler line 165117395Skan to define a local common symbol. */ 166117395Skan 167117395Skan#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \ 168117395Skan( fputs (".lcomm ", (FILE)), \ 169117395Skan assemble_name ((FILE), (NAME)), \ 170132718Skan fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED"\n", (ROUNDED))) 171117395Skan 172117395Skan/* Darwin profiling -- call mcount. */ 173117395Skan#undef FUNCTION_PROFILER 174117395Skan#define FUNCTION_PROFILER(FILE, LABELNO) \ 175117395Skan do { \ 176169689Skan if (MACHOPIC_INDIRECT && !TARGET_64BIT) \ 177117395Skan { \ 178169689Skan const char *name = machopic_mcount_stub_name (); \ 179117395Skan fprintf (FILE, "\tcall %s\n", name+1); /* skip '&' */ \ 180169689Skan machopic_validate_stub_or_non_lazy_ptr (name); \ 181117395Skan } \ 182117395Skan else fprintf (FILE, "\tcall mcount\n"); \ 183117395Skan } while (0) 184169689Skan 185169689Skan#define C_COMMON_OVERRIDE_OPTIONS \ 186169689Skan do { \ 187169689Skan SUBTARGET_C_COMMON_OVERRIDE_OPTIONS; \ 188169689Skan } while (0) 189169689Skan 190169689Skan/* Darwin on x86_64 uses dwarf-2 by default. */ 191169689Skan#undef PREFERRED_DEBUGGING_TYPE 192169689Skan#define PREFERRED_DEBUGGING_TYPE (TARGET_64BIT ? DWARF2_DEBUG : DBX_DEBUG) 193169689Skan 194169689Skan/* Darwin uses the standard DWARF register numbers but the default 195169689Skan register numbers for STABS. Fortunately for 64-bit code the 196169689Skan default and the standard are the same. */ 197169689Skan#undef DBX_REGISTER_NUMBER 198169689Skan#define DBX_REGISTER_NUMBER(n) \ 199169689Skan (TARGET_64BIT ? dbx64_register_map[n] \ 200169689Skan : write_symbols == DWARF2_DEBUG ? svr4_dbx_register_map[n] \ 201169689Skan : dbx_register_map[n]) 202169689Skan 203169689Skan/* Unfortunately, the 32-bit EH information also doesn't use the standard 204169689Skan DWARF register numbers. */ 205169689Skan#define DWARF2_FRAME_REG_OUT(n, for_eh) \ 206169689Skan (! (for_eh) || write_symbols != DWARF2_DEBUG || TARGET_64BIT ? (n) \ 207169689Skan : (n) == 5 ? 4 \ 208169689Skan : (n) == 4 ? 5 \ 209169689Skan : (n) >= 11 && (n) <= 18 ? (n) + 1 \ 210169689Skan : (n)) 211169689Skan 212169689Skan#undef REGISTER_TARGET_PRAGMAS 213169689Skan#define REGISTER_TARGET_PRAGMAS() DARWIN_REGISTER_TARGET_PRAGMAS() 214169689Skan 215169689Skan#undef TARGET_SET_DEFAULT_TYPE_ATTRIBUTES 216169689Skan#define TARGET_SET_DEFAULT_TYPE_ATTRIBUTES darwin_set_default_type_attributes 217169689Skan 218169689Skan/* For 64-bit, we need to add 4 because @GOTPCREL is relative to the 219169689Skan end of the instruction, but without the 4 we'd only have the right 220169689Skan address for the start of the instruction. */ 221169689Skan#undef ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX 222169689Skan#define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(FILE, ENCODING, SIZE, ADDR, DONE) \ 223169689Skan if (TARGET_64BIT) \ 224169689Skan { \ 225169689Skan if ((SIZE) == 4 && ((ENCODING) & 0x70) == DW_EH_PE_pcrel) \ 226169689Skan { \ 227169689Skan fputs (ASM_LONG, FILE); \ 228169689Skan assemble_name (FILE, XSTR (ADDR, 0)); \ 229169689Skan fputs ("+4@GOTPCREL", FILE); \ 230169689Skan goto DONE; \ 231169689Skan } \ 232169689Skan } \ 233169689Skan else \ 234169689Skan { \ 235169689Skan if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) \ 236169689Skan { \ 237169689Skan darwin_non_lazy_pcrel (FILE, ADDR); \ 238169689Skan goto DONE; \ 239169689Skan } \ 240169689Skan } 241169689Skan 242169689Skan/* This needs to move since i386 uses the first flag and other flags are 243169689Skan used in Mach-O. */ 244169689Skan#undef MACHO_SYMBOL_FLAG_VARIABLE 245169689Skan#define MACHO_SYMBOL_FLAG_VARIABLE ((SYMBOL_FLAG_MACH_DEP) << 3) 246