| /* Target definitions for x86 running Darwin. |
| Copyright (C) 2001-2016 Free Software Foundation, Inc. |
| Contributed by Apple Computer Inc. |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3, or (at your option) |
| any later version. |
| |
| GCC is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| /* Enable Mach-O bits in generic x86 code. */ |
| #undef TARGET_MACHO |
| #define TARGET_MACHO 1 |
| |
| #undef DARWIN_X86 |
| #define DARWIN_X86 1 |
| |
| #undef TARGET_64BIT |
| #undef TARGET_64BIT_P |
| #define TARGET_64BIT TARGET_ISA_64BIT |
| #define TARGET_64BIT_P(x) TARGET_ISA_64BIT_P(x) |
| |
| #ifdef IN_LIBGCC2 |
| #undef TARGET_64BIT |
| #ifdef __x86_64__ |
| #define TARGET_64BIT 1 |
| #else |
| #define TARGET_64BIT 0 |
| #endif |
| #endif |
| |
| /* Size of the Obj-C jump buffer. */ |
| #define OBJC_JBLEN ((TARGET_64BIT) ? ((9 * 2) + 3 + 16) : (18)) |
| |
| #undef TARGET_FPMATH_DEFAULT |
| #define TARGET_FPMATH_DEFAULT (TARGET_SSE ? FPMATH_SSE : FPMATH_387) |
| |
| #define TARGET_OS_CPP_BUILTINS() \ |
| do \ |
| { \ |
| builtin_define ("__LITTLE_ENDIAN__"); \ |
| darwin_cpp_builtins (pfile); \ |
| } \ |
| while (0) |
| |
| #undef PTRDIFF_TYPE |
| #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int") |
| |
| #undef WCHAR_TYPE |
| #define WCHAR_TYPE "int" |
| |
| #undef WCHAR_TYPE_SIZE |
| #define WCHAR_TYPE_SIZE 32 |
| |
| /* Generate branch islands stubs if this is true. */ |
| extern int darwin_emit_branch_islands; |
| |
| #undef TARGET_MACHO_BRANCH_ISLANDS |
| #define TARGET_MACHO_BRANCH_ISLANDS darwin_emit_branch_islands |
| |
| /* For compatibility with OSX system tools, use the new style of pic stub |
| if this is set. */ |
| #undef MACHOPIC_ATT_STUB |
| #define MACHOPIC_ATT_STUB (darwin_macho_att_stub) |
| |
| #undef MAX_BITS_PER_WORD |
| #define MAX_BITS_PER_WORD 64 |
| |
| #undef FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN |
| #define FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN (0) |
| |
| #undef TARGET_KEEPS_VECTOR_ALIGNED_STACK |
| #define TARGET_KEEPS_VECTOR_ALIGNED_STACK 1 |
| |
| /* On Darwin, the stack is 128-bit aligned at the point of every call. |
| Failure to ensure this will lead to a crash in the system libraries |
| or dynamic loader. */ |
| #undef STACK_BOUNDARY |
| #define STACK_BOUNDARY \ |
| ((profile_flag || (TARGET_64BIT && ix86_abi == MS_ABI)) \ |
| ? 128 : BITS_PER_WORD) |
| |
| #undef MAIN_STACK_BOUNDARY |
| #define MAIN_STACK_BOUNDARY 128 |
| |
| /* Since we'll never want a stack boundary less aligned than 128 bits |
| we need the extra work here otherwise bits of gcc get very grumpy |
| when we ask for lower alignment. We could just reject values less |
| than 128 bits for Darwin, but it's easier to up the alignment if |
| it's below the minimum. */ |
| #undef PREFERRED_STACK_BOUNDARY |
| #define PREFERRED_STACK_BOUNDARY \ |
| MAX (128, ix86_preferred_stack_boundary) |
| |
| /* We want -fPIC by default, unless we're using -static to compile for |
| the kernel or some such. */ |
| |
| #undef CC1_SPEC |
| #define CC1_SPEC "%(cc1_cpu) \ |
| %{!mkernel:%{!static:%{!mdynamic-no-pic:-fPIC}}} \ |
| %{!mmacosx-version-min=*:-mmacosx-version-min=%(darwin_minversion)} \ |
| %{g: %{!fno-eliminate-unused-debug-symbols: -feliminate-unused-debug-symbols }} " \ |
| DARWIN_CC1_SPEC |
| |
| #undef ASM_SPEC |
| #define ASM_SPEC "-arch %(darwin_arch) -force_cpusubtype_ALL \ |
| %{static}" |
| |
| #define DARWIN_ARCH_SPEC "%{m64:x86_64;:i386}" |
| #define DARWIN_SUBARCH_SPEC DARWIN_ARCH_SPEC |
| |
| /* Determine a minimum version based on compiler options. */ |
| #define DARWIN_MINVERSION_SPEC \ |
| "%{!m64|fgnu-runtime:10.4; \ |
| ,objective-c|,objc-cpp-output:10.5; \ |
| ,objective-c-header:10.5; \ |
| ,objective-c++|,objective-c++-cpp-output:10.5; \ |
| ,objective-c++-header|,objc++-cpp-output:10.5; \ |
| :10.4}" |
| |
| #undef ENDFILE_SPEC |
| #define ENDFILE_SPEC \ |
| "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \ |
| %{mpc32:crtprec32.o%s} \ |
| %{mpc64:crtprec64.o%s} \ |
| %{mpc80:crtprec80.o%s}" TM_DESTRUCTOR |
| |
| #undef SUBTARGET_EXTRA_SPECS |
| #define SUBTARGET_EXTRA_SPECS \ |
| DARWIN_EXTRA_SPECS \ |
| { "darwin_arch", DARWIN_ARCH_SPEC }, \ |
| { "darwin_crt2", "" }, \ |
| { "darwin_subarch", DARWIN_SUBARCH_SPEC }, |
| |
| /* The Darwin assembler mostly follows AT&T syntax. */ |
| #undef ASSEMBLER_DIALECT |
| #define ASSEMBLER_DIALECT ASM_ATT |
| |
| /* Define macro used to output shift-double opcodes when the shift |
| count is in %cl. Some assemblers require %cl as an argument; |
| some don't. This macro controls what to do: by default, don't |
| print %cl. */ |
| |
| #define SHIFT_DOUBLE_OMITS_COUNT 0 |
| |
| #undef TARGET_ASM_FILE_END |
| #define TARGET_ASM_FILE_END darwin_file_end |
| |
| /* Define the syntax of pseudo-ops, labels and comments. */ |
| |
| /* String containing the assembler's comment-starter. */ |
| |
| #define ASM_COMMENT_START "#" |
| |
| /* By default, target has a 80387, uses IEEE compatible arithmetic, |
| and returns float values in the 387. */ |
| |
| #undef TARGET_SUBTARGET_DEFAULT |
| #define TARGET_SUBTARGET_DEFAULT (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_128BIT_LONG_DOUBLE) |
| |
| /* For darwin we want to target specific processor features as a minimum, |
| but these unfortunately don't correspond to a specific processor. */ |
| #undef TARGET_SUBTARGET32_ISA_DEFAULT |
| #define TARGET_SUBTARGET32_ISA_DEFAULT (OPTION_MASK_ISA_MMX \ |
| | OPTION_MASK_ISA_SSE \ |
| | OPTION_MASK_ISA_SSE2 \ |
| | OPTION_MASK_ISA_SSE3) |
| |
| #undef TARGET_SUBTARGET64_ISA_DEFAULT |
| #define TARGET_SUBTARGET64_ISA_DEFAULT TARGET_SUBTARGET32_ISA_DEFAULT |
| |
| #undef GOT_SYMBOL_NAME |
| #define GOT_SYMBOL_NAME MACHOPIC_FUNCTION_BASE_NAME |
| |
| /* Define the syntax of pseudo-ops, labels and comments. */ |
| |
| #define LPREFIX "L" |
| |
| /* Assembler pseudos to introduce constants of various size. */ |
| |
| #define ASM_BYTE "\t.byte\t" |
| #define ASM_SHORT "\t.word\t" |
| #define ASM_LONG "\t.long\t" |
| #define ASM_QUAD "\t.quad\t" |
| |
| #define SUBTARGET_ENCODE_SECTION_INFO darwin_encode_section_info |
| |
| #undef ASM_OUTPUT_ALIGN |
| #define ASM_OUTPUT_ALIGN(FILE,LOG) \ |
| do { if ((LOG) != 0) \ |
| { \ |
| if (in_section == text_section) \ |
| fprintf (FILE, "\t%s %d,0x90\n", ALIGN_ASM_OP, (LOG)); \ |
| else \ |
| fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG)); \ |
| } \ |
| } while (0) |
| |
| /* Darwin profiling -- call mcount. */ |
| #undef FUNCTION_PROFILER |
| #define FUNCTION_PROFILER(FILE, LABELNO) \ |
| do { \ |
| if (TARGET_MACHO_BRANCH_ISLANDS \ |
| && MACHOPIC_INDIRECT && !TARGET_64BIT) \ |
| { \ |
| const char *name = machopic_mcount_stub_name (); \ |
| fprintf (FILE, "\tcall %s\n", name+1); /* skip '&' */ \ |
| machopic_validate_stub_or_non_lazy_ptr (name); \ |
| } \ |
| else fprintf (FILE, "\tcall mcount\n"); \ |
| } while (0) |
| |
| #define C_COMMON_OVERRIDE_OPTIONS \ |
| do { \ |
| SUBTARGET_C_COMMON_OVERRIDE_OPTIONS; \ |
| } while (0) |
| |
| #undef SUBTARGET_OVERRIDE_OPTIONS |
| #define SUBTARGET_OVERRIDE_OPTIONS \ |
| do { \ |
| if (TARGET_64BIT && MACHO_DYNAMIC_NO_PIC_P) \ |
| target_flags &= ~MASK_MACHO_DYNAMIC_NO_PIC; \ |
| } while (0) |
| |
| /* Darwin on x86_64 uses dwarf-2 by default. Pre-darwin9 32-bit |
| compiles default to stabs+. darwin9+ defaults to dwarf-2. */ |
| #ifndef DARWIN_PREFER_DWARF |
| #undef PREFERRED_DEBUGGING_TYPE |
| #ifdef HAVE_AS_STABS_DIRECTIVE |
| #define PREFERRED_DEBUGGING_TYPE (TARGET_64BIT ? DWARF2_DEBUG : DBX_DEBUG) |
| #else |
| #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG |
| #endif |
| #endif |
| |
| /* Darwin uses the standard DWARF register numbers but the default |
| register numbers for STABS. Fortunately for 64-bit code the |
| default and the standard are the same. */ |
| #undef DBX_REGISTER_NUMBER |
| #define DBX_REGISTER_NUMBER(n) \ |
| (TARGET_64BIT ? dbx64_register_map[n] \ |
| : write_symbols == DWARF2_DEBUG ? svr4_dbx_register_map[n] \ |
| : dbx_register_map[n]) |
| |
| /* Unfortunately, the 32-bit EH information also doesn't use the standard |
| DWARF register numbers. */ |
| #define DWARF2_FRAME_REG_OUT(n, for_eh) \ |
| (! (for_eh) || write_symbols != DWARF2_DEBUG || TARGET_64BIT ? (n) \ |
| : (n) == 5 ? 4 \ |
| : (n) == 4 ? 5 \ |
| : (n) >= 11 && (n) <= 18 ? (n) + 1 \ |
| : (n)) |
| |
| #undef REGISTER_SUBTARGET_PRAGMAS |
| #define REGISTER_SUBTARGET_PRAGMAS() DARWIN_REGISTER_TARGET_PRAGMAS() |
| |
| #undef TARGET_SET_DEFAULT_TYPE_ATTRIBUTES |
| #define TARGET_SET_DEFAULT_TYPE_ATTRIBUTES darwin_set_default_type_attributes |
| |
| /* For 64-bit, we need to add 4 because @GOTPCREL is relative to the |
| end of the instruction, but without the 4 we'd only have the right |
| address for the start of the instruction. */ |
| #undef ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX |
| #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(FILE, ENCODING, SIZE, ADDR, DONE) \ |
| if (TARGET_64BIT) \ |
| { \ |
| if ((SIZE) == 4 && ((ENCODING) & 0x70) == DW_EH_PE_pcrel) \ |
| { \ |
| fputs (ASM_LONG, FILE); \ |
| assemble_name (FILE, XSTR (ADDR, 0)); \ |
| fputs ("+4@GOTPCREL", FILE); \ |
| goto DONE; \ |
| } \ |
| } \ |
| else \ |
| { \ |
| if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) \ |
| { \ |
| darwin_non_lazy_pcrel (FILE, ADDR); \ |
| goto DONE; \ |
| } \ |
| } |
| |
| /* This needs to move since i386 uses the first flag and other flags are |
| used in Mach-O. */ |
| #undef MACHO_SYMBOL_FLAG_VARIABLE |
| #define MACHO_SYMBOL_FLAG_VARIABLE ((SYMBOL_FLAG_MACH_DEP) << 3) |
| |
| #undef MACHOPIC_NL_SYMBOL_PTR_SECTION |
| #define MACHOPIC_NL_SYMBOL_PTR_SECTION \ |
| ".section __IMPORT,__pointers,non_lazy_symbol_pointers" |
| |
| #define SUBTARGET32_DEFAULT_CPU "i686" |
| |
| #undef SUBTARGET_INIT_BUILTINS |
| #define SUBTARGET_INIT_BUILTINS \ |
| do { \ |
| ix86_builtins[(int) IX86_BUILTIN_CFSTRING] \ |
| = darwin_init_cfstring_builtins ((unsigned) (IX86_BUILTIN_CFSTRING)); \ |
| darwin_rename_builtins (); \ |
| } while(0) |