1 /* Target definitions for x86 running Darwin. 2 Copyright (C) 2001-2014 Free Software Foundation, Inc. 3 Contributed by Apple Computer Inc. 4 5 This file is part of GCC. 6 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 3, or (at your option) 10 any later version. 11 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. 16 17 You should have received a copy of the GNU General Public License 18 along 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 /* Size of the Obj-C jump buffer. */ 43 #define OBJC_JBLEN ((TARGET_64BIT) ? ((9 * 2) + 3 + 16) : (18)) 44 45 #undef TARGET_FPMATH_DEFAULT 46 #define TARGET_FPMATH_DEFAULT (TARGET_SSE ? FPMATH_SSE : FPMATH_387) 47 48 #define TARGET_OS_CPP_BUILTINS() \ 49 do \ 50 { \ 51 builtin_define ("__LITTLE_ENDIAN__"); \ 52 darwin_cpp_builtins (pfile); \ 53 } \ 54 while (0) 55 56 #undef PTRDIFF_TYPE 57 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int") 58 59 #undef WCHAR_TYPE 60 #define WCHAR_TYPE "int" 61 62 #undef WCHAR_TYPE_SIZE 63 #define WCHAR_TYPE_SIZE 32 64 65 /* Generate branch islands stubs if this is true. */ 66 extern int darwin_emit_branch_islands; 67 68 #undef TARGET_MACHO_BRANCH_ISLANDS 69 #define TARGET_MACHO_BRANCH_ISLANDS darwin_emit_branch_islands 70 71 /* For compatibility with OSX system tools, use the new style of pic stub 72 if this is set. */ 73 #undef MACHOPIC_ATT_STUB 74 #define MACHOPIC_ATT_STUB (darwin_macho_att_stub) 75 76 #undef MAX_BITS_PER_WORD 77 #define MAX_BITS_PER_WORD 64 78 79 #undef FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN 80 #define FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN (0) 81 82 #undef TARGET_KEEPS_VECTOR_ALIGNED_STACK 83 #define TARGET_KEEPS_VECTOR_ALIGNED_STACK 1 84 85 /* On Darwin, the stack is 128-bit aligned at the point of every call. 86 Failure to ensure this will lead to a crash in the system libraries 87 or dynamic loader. */ 88 #undef STACK_BOUNDARY 89 #define STACK_BOUNDARY \ 90 ((profile_flag || (TARGET_64BIT && ix86_abi == MS_ABI)) \ 91 ? 128 : BITS_PER_WORD) 92 93 #undef MAIN_STACK_BOUNDARY 94 #define MAIN_STACK_BOUNDARY 128 95 96 /* Since we'll never want a stack boundary less aligned than 128 bits 97 we need the extra work here otherwise bits of gcc get very grumpy 98 when we ask for lower alignment. We could just reject values less 99 than 128 bits for Darwin, but it's easier to up the alignment if 100 it's below the minimum. */ 101 #undef PREFERRED_STACK_BOUNDARY 102 #define PREFERRED_STACK_BOUNDARY \ 103 MAX (128, ix86_preferred_stack_boundary) 104 105 /* We want -fPIC by default, unless we're using -static to compile for 106 the kernel or some such. */ 107 108 #undef CC1_SPEC 109 #define CC1_SPEC "%(cc1_cpu) \ 110 %{!mkernel:%{!static:%{!mdynamic-no-pic:-fPIC}}} \ 111 %{!mmacosx-version-min=*:-mmacosx-version-min=%(darwin_minversion)} \ 112 %{g: %{!fno-eliminate-unused-debug-symbols: -feliminate-unused-debug-symbols }} " \ 113 DARWIN_CC1_SPEC 114 115 #undef ASM_SPEC 116 #define ASM_SPEC "-arch %(darwin_arch) -force_cpusubtype_ALL \ 117 %{static}" 118 119 #define DARWIN_ARCH_SPEC "%{m64:x86_64;:i386}" 120 #define DARWIN_SUBARCH_SPEC DARWIN_ARCH_SPEC 121 122 /* Determine a minimum version based on compiler options. */ 123 #define DARWIN_MINVERSION_SPEC \ 124 "%{!m64|fgnu-runtime:10.4; \ 125 ,objective-c|,objc-cpp-output:10.5; \ 126 ,objective-c-header:10.5; \ 127 ,objective-c++|,objective-c++-cpp-output:10.5; \ 128 ,objective-c++-header|,objc++-cpp-output:10.5; \ 129 :10.4}" 130 131 #undef ENDFILE_SPEC 132 #define ENDFILE_SPEC \ 133 "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \ 134 %{mpc32:crtprec32.o%s} \ 135 %{mpc64:crtprec64.o%s} \ 136 %{mpc80:crtprec80.o%s}" TM_DESTRUCTOR 137 138 #undef SUBTARGET_EXTRA_SPECS 139 #define SUBTARGET_EXTRA_SPECS \ 140 DARWIN_EXTRA_SPECS \ 141 { "darwin_arch", DARWIN_ARCH_SPEC }, \ 142 { "darwin_crt2", "" }, \ 143 { "darwin_subarch", DARWIN_SUBARCH_SPEC }, 144 145 /* The Darwin assembler mostly follows AT&T syntax. */ 146 #undef ASSEMBLER_DIALECT 147 #define ASSEMBLER_DIALECT ASM_ATT 148 149 /* 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 152 print %cl. */ 153 154 #define SHIFT_DOUBLE_OMITS_COUNT 0 155 156 /* 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 160 #define TF_SIZE 113 161 162 #undef TARGET_ASM_FILE_END 163 #define TARGET_ASM_FILE_END darwin_file_end 164 165 /* Define the syntax of pseudo-ops, labels and comments. */ 166 167 /* String containing the assembler's comment-starter. */ 168 169 #define ASM_COMMENT_START "#" 170 171 /* By default, target has a 80387, uses IEEE compatible arithmetic, 172 and returns float values in the 387. */ 173 174 #undef TARGET_SUBTARGET_DEFAULT 175 #define TARGET_SUBTARGET_DEFAULT (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_128BIT_LONG_DOUBLE) 176 177 /* 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) 184 185 #undef TARGET_SUBTARGET64_ISA_DEFAULT 186 #define TARGET_SUBTARGET64_ISA_DEFAULT TARGET_SUBTARGET32_ISA_DEFAULT 187 188 #undef GOT_SYMBOL_NAME 189 #define GOT_SYMBOL_NAME MACHOPIC_FUNCTION_BASE_NAME 190 191 /* Define the syntax of pseudo-ops, labels and comments. */ 192 193 #define LPREFIX "L" 194 195 /* Assembler pseudos to introduce constants of various size. */ 196 197 #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" 201 202 #define SUBTARGET_ENCODE_SECTION_INFO darwin_encode_section_info 203 204 #undef ASM_OUTPUT_ALIGN 205 #define ASM_OUTPUT_ALIGN(FILE,LOG) \ 206 do { if ((LOG) != 0) \ 207 { \ 208 if (in_section == text_section) \ 209 fprintf (FILE, "\t%s %d,0x90\n", ALIGN_ASM_OP, (LOG)); \ 210 else \ 211 fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG)); \ 212 } \ 213 } while (0) 214 215 /* Darwin profiling -- call mcount. */ 216 #undef FUNCTION_PROFILER 217 #define FUNCTION_PROFILER(FILE, LABELNO) \ 218 do { \ 219 if (TARGET_MACHO_BRANCH_ISLANDS \ 220 && MACHOPIC_INDIRECT && !TARGET_64BIT) \ 221 { \ 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); \ 225 } \ 226 else fprintf (FILE, "\tcall mcount\n"); \ 227 } while (0) 228 229 #define C_COMMON_OVERRIDE_OPTIONS \ 230 do { \ 231 SUBTARGET_C_COMMON_OVERRIDE_OPTIONS; \ 232 } while (0) 233 234 #undef SUBTARGET_OVERRIDE_OPTIONS 235 #define SUBTARGET_OVERRIDE_OPTIONS \ 236 do { \ 237 if (TARGET_64BIT && MACHO_DYNAMIC_NO_PIC_P) \ 238 target_flags &= ~MASK_MACHO_DYNAMIC_NO_PIC; \ 239 } while (0) 240 241 /* 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) 246 #endif 247 248 /* 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]) 256 257 /* 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) \ 261 : (n) == 5 ? 4 \ 262 : (n) == 4 ? 5 \ 263 : (n) >= 11 && (n) <= 18 ? (n) + 1 \ 264 : (n)) 265 266 #undef REGISTER_SUBTARGET_PRAGMAS 267 #define REGISTER_SUBTARGET_PRAGMAS() DARWIN_REGISTER_TARGET_PRAGMAS() 268 269 #undef TARGET_SET_DEFAULT_TYPE_ATTRIBUTES 270 #define TARGET_SET_DEFAULT_TYPE_ATTRIBUTES darwin_set_default_type_attributes 271 272 /* 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) \ 277 if (TARGET_64BIT) \ 278 { \ 279 if ((SIZE) == 4 && ((ENCODING) & 0x70) == DW_EH_PE_pcrel) \ 280 { \ 281 fputs (ASM_LONG, FILE); \ 282 assemble_name (FILE, XSTR (ADDR, 0)); \ 283 fputs ("+4@GOTPCREL", FILE); \ 284 goto DONE; \ 285 } \ 286 } \ 287 else \ 288 { \ 289 if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) \ 290 { \ 291 darwin_non_lazy_pcrel (FILE, ADDR); \ 292 goto DONE; \ 293 } \ 294 } 295 296 /* This needs to move since i386 uses the first flag and other flags are 297 used in Mach-O. */ 298 #undef MACHO_SYMBOL_FLAG_VARIABLE 299 #define MACHO_SYMBOL_FLAG_VARIABLE ((SYMBOL_FLAG_MACH_DEP) << 3) 300 301 #undef MACHOPIC_NL_SYMBOL_PTR_SECTION 302 #define MACHOPIC_NL_SYMBOL_PTR_SECTION \ 303 ".section __IMPORT,__pointers,non_lazy_symbol_pointers" 304 305 #define SUBTARGET32_DEFAULT_CPU "i686" 306 307 #undef SUBTARGET_INIT_BUILTINS 308 #define SUBTARGET_INIT_BUILTINS \ 309 do { \ 310 ix86_builtins[(int) IX86_BUILTIN_CFSTRING] \ 311 = darwin_init_cfstring_builtins ((unsigned) (IX86_BUILTIN_CFSTRING)); \ 312 darwin_rename_builtins (); \ 313 } while(0) 314