339 lines
11 KiB
C
339 lines
11 KiB
C
/* Target definitions for x86 running Darwin.
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Copyright (C) 2001-2021 Free Software Foundation, Inc.
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Contributed by Apple Computer Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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/* Enable Mach-O bits in generic x86 code. */
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#undef TARGET_MACHO
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#define TARGET_MACHO 1
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#undef DARWIN_X86
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#define DARWIN_X86 1
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#undef TARGET_64BIT
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#define TARGET_64BIT TARGET_ISA_64BIT
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#undef TARGET_64BIT_P
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#define TARGET_64BIT_P(x) TARGET_ISA_64BIT_P(x)
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#ifdef IN_LIBGCC2
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#undef TARGET_64BIT
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#ifdef __x86_64__
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#define TARGET_64BIT 1
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#else
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#define TARGET_64BIT 0
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#endif
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#endif
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#define OBJC_JBLEN ((TARGET_64BIT) ? ((9 * 2) + 3 + 16) : (18))
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#undef TARGET_FPMATH_DEFAULT
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#define TARGET_FPMATH_DEFAULT (TARGET_SSE ? FPMATH_SSE : FPMATH_387)
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#undef TARGET_FPMATH_DEFAULT_P
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#define TARGET_FPMATH_DEFAULT_P(x) \
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(TARGET_SSE_P(x) ? FPMATH_SSE : FPMATH_387)
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#define TARGET_OS_CPP_BUILTINS() \
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do { \
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builtin_define ("__LITTLE_ENDIAN__"); \
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darwin_cpp_builtins (pfile); \
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} while (0)
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#undef PTRDIFF_TYPE
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#define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
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#undef WCHAR_TYPE
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#define WCHAR_TYPE "int"
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#undef WCHAR_TYPE_SIZE
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#define WCHAR_TYPE_SIZE 32
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/* Generate pic symbol indirection stubs if this is true. */
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#undef TARGET_MACHO_SYMBOL_STUBS
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#define TARGET_MACHO_SYMBOL_STUBS (darwin_symbol_stubs)
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/* For compatibility with OSX system tools, use the new style of pic stub
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if this is set (default). */
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#undef MACHOPIC_ATT_STUB
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#define MACHOPIC_ATT_STUB (darwin_macho_att_stub)
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#undef MAX_BITS_PER_WORD
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#define MAX_BITS_PER_WORD 64
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#undef FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN
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#define FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN (0)
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#undef TARGET_KEEPS_VECTOR_ALIGNED_STACK
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#define TARGET_KEEPS_VECTOR_ALIGNED_STACK 1
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/* On Darwin, the stack is 128-bit aligned at the point of every call.
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Failure to ensure this will lead to a crash in the system libraries
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or dynamic loader. */
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#undef MAIN_STACK_BOUNDARY
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#define MAIN_STACK_BOUNDARY 128
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/* Since we'll never want a stack boundary less aligned than 128 bits
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we need the extra work here otherwise bits of gcc get very grumpy
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when we ask for lower alignment. We could just reject values less
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than 128 bits for Darwin, but it's easier to up the alignment if
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it's below the minimum. */
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#undef PREFERRED_STACK_BOUNDARY
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#define PREFERRED_STACK_BOUNDARY \
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MAX (128, ix86_preferred_stack_boundary)
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/* We want -fPIC by default, unless we're using -static to compile for
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the kernel or some such. */
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#undef CC1_SPEC
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#define CC1_SPEC "%(cc1_cpu) \
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%{!mkernel:%{!static:%{!mdynamic-no-pic:-fPIC}}} \
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%{g: %{!fno-eliminate-unused-debug-symbols: -feliminate-unused-debug-symbols }} \
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%{mx32:%eDarwin is not an mx32 platform} \
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%{mfentry*:%eDarwin does not support -mfentry or associated options}" \
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DARWIN_CC1_SPEC
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/* This is a workaround for a tool bug: see PR100340. */
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#ifdef HAVE_AS_MLLVM_X86_PAD_FOR_ALIGN
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#define EXTRA_ASM_OPTS " -mllvm -x86-pad-for-align=false "
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#else
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#define EXTRA_ASM_OPTS ""
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#endif
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#undef ASM_SPEC
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#define ASM_SPEC \
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"%{static} -arch %(darwin_arch) " \
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ASM_OPTIONS ASM_MMACOSX_VERSION_MIN_SPEC EXTRA_ASM_OPTS \
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"%{!force_cpusubtype_ALL:-force_cpusubtype_ALL} "
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#undef ENDFILE_SPEC
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#define ENDFILE_SPEC \
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"%{mdaz-ftz:crtfastmath.o%s;Ofast|ffast-math|funsafe-math-optimizations:%{!mno-daz-ftz:crtfastmath.o%s}} \
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%{mpc32:crtprec32.o%s} \
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%{mpc64:crtprec64.o%s} \
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%{mpc80:crtprec80.o%s}" TM_DESTRUCTOR
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/* We default to x86_64 for single-arch builds, bi-arch overrides. */
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#define DARWIN_ARCH_SPEC "x86_64"
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#undef SUBTARGET_EXTRA_SPECS
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#define SUBTARGET_EXTRA_SPECS \
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DARWIN_EXTRA_SPECS \
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{ "darwin_arch", DARWIN_ARCH_SPEC }, \
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{ "darwin_crt2", "" }, \
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{ "darwin_subarch", DARWIN_ARCH_SPEC },
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/* The Darwin assembler mostly follows AT&T syntax. */
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#undef ASSEMBLER_DIALECT
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#define ASSEMBLER_DIALECT ASM_ATT
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/* Define macro used to output shift-double opcodes when the shift
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count is in %cl. Some assemblers require %cl as an argument;
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some don't. This macro controls what to do: by default, don't
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print %cl. */
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#define SHIFT_DOUBLE_OMITS_COUNT 0
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#undef TARGET_ASM_FILE_END
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#define TARGET_ASM_FILE_END darwin_file_end
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/* Define the syntax of pseudo-ops, labels and comments. */
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/* String containing the assembler's comment-starter. */
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#define ASM_COMMENT_START "#"
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/* By default, target has a 80387, uses IEEE compatible arithmetic,
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and returns float values in the 387. */
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#undef TARGET_SUBTARGET_DEFAULT
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#define TARGET_SUBTARGET_DEFAULT \
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(MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_128BIT_LONG_DOUBLE)
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/* For darwin we want to target specific processor features as a minimum,
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but these unfortunately don't correspond to a specific processor. */
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#undef TARGET_SUBTARGET32_ISA_DEFAULT
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#define TARGET_SUBTARGET32_ISA_DEFAULT \
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(OPTION_MASK_ISA_MMX | OPTION_MASK_ISA_SSE \
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| OPTION_MASK_ISA_SSE2 | OPTION_MASK_ISA_SSE3)
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#undef TARGET_SUBTARGET64_ISA_DEFAULT
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#define TARGET_SUBTARGET64_ISA_DEFAULT TARGET_SUBTARGET32_ISA_DEFAULT
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#undef GOT_SYMBOL_NAME
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#define GOT_SYMBOL_NAME MACHOPIC_FUNCTION_BASE_NAME
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/* Define the syntax of pseudo-ops, labels and comments. */
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#define LPREFIX "L"
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/* Assembler pseudos to introduce constants of various size. */
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#define ASM_BYTE "\t.byte\t"
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#define ASM_SHORT "\t.word\t"
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#define ASM_LONG "\t.long\t"
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#define ASM_QUAD "\t.quad\t"
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#define SUBTARGET_ENCODE_SECTION_INFO darwin_encode_section_info
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#undef ASM_OUTPUT_ALIGN
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#define ASM_OUTPUT_ALIGN(FILE,LOG) \
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do { \
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if ((LOG) != 0) \
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{ \
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if (in_section == text_section) \
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fprintf (FILE, "\t%s %d,0x90\n", ALIGN_ASM_OP, (LOG)); \
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else \
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fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG)); \
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} \
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} while (0)
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#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
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#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
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do { \
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if ((LOG) != 0) { \
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if ((MAX_SKIP) == 0 || (MAX_SKIP) >= (1 << (LOG)) - 1) \
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fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
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else \
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fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
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} \
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} while (0)
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#endif
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/* Darwin x86 assemblers support the .ident directive. */
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#undef TARGET_ASM_OUTPUT_IDENT
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#define TARGET_ASM_OUTPUT_IDENT default_asm_output_ident_directive
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/* We always want jump tables in the text section:
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* for PIC code, we need the subtracted symbol to be defined at
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assembly-time.
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* for mdynamic-no-pic, we cannot support jump tables in the .const
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section for weak functions, this looks to ld64 like direct access
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to the weak symbol from an anonymous atom. */
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#undef JUMP_TABLES_IN_TEXT_SECTION
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#define JUMP_TABLES_IN_TEXT_SECTION 1
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/* Darwin profiling -- call mcount.
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If we need a stub, then we unconditionally mark it as used. */
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#undef FUNCTION_PROFILER
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#define FUNCTION_PROFILER(FILE, LABELNO) \
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do { \
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if (TARGET_MACHO_SYMBOL_STUBS \
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&& MACHOPIC_INDIRECT && !TARGET_64BIT) \
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{ \
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const char *name = machopic_mcount_stub_name (); \
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fprintf (FILE, "\tcall %s\n", name+1); /* skip '&' */ \
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} \
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else fprintf (FILE, "\tcall mcount\n"); \
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} while (0)
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#define C_COMMON_OVERRIDE_OPTIONS \
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do { \
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SUBTARGET_C_COMMON_OVERRIDE_OPTIONS; \
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} while (0)
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#undef SUBTARGET_OVERRIDE_OPTIONS
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#define SUBTARGET_OVERRIDE_OPTIONS \
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do { \
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if (TARGET_64BIT && MACHO_DYNAMIC_NO_PIC_P) \
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target_flags &= ~MASK_MACHO_DYNAMIC_NO_PIC; \
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} while (0)
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/* Darwin on x86_64 uses dwarf-2 by default. Pre-darwin9 32-bit
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compiles default to stabs+. darwin9+ defaults to dwarf-2. */
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#ifndef DARWIN_PREFER_DWARF
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#undef PREFERRED_DEBUGGING_TYPE
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#ifdef HAVE_AS_STABS_DIRECTIVE
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#define PREFERRED_DEBUGGING_TYPE (TARGET_64BIT ? DWARF2_DEBUG : DBX_DEBUG)
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#else
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#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
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#endif
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#endif
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/* Darwin uses the standard DWARF register numbers but the default
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register numbers for STABS. Fortunately for 64-bit code the
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default and the standard are the same. */
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#undef DBX_REGISTER_NUMBER
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#define DBX_REGISTER_NUMBER(n) \
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(TARGET_64BIT ? dbx64_register_map[n] \
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: write_symbols == DWARF2_DEBUG ? svr4_dbx_register_map[n] \
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: dbx_register_map[n])
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/* Unfortunately, the 32-bit EH information also doesn't use the standard
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DWARF register numbers. */
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#define DWARF2_FRAME_REG_OUT(n, for_eh) \
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(! (for_eh) || write_symbols != DWARF2_DEBUG || TARGET_64BIT ? (n) \
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: (n) == 5 ? 4 \
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: (n) == 4 ? 5 \
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: (n) >= 11 && (n) <= 18 ? (n) + 1 \
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: (n))
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#undef REGISTER_SUBTARGET_PRAGMAS
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#define REGISTER_SUBTARGET_PRAGMAS() DARWIN_REGISTER_TARGET_PRAGMAS()
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#undef TARGET_SET_DEFAULT_TYPE_ATTRIBUTES
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#define TARGET_SET_DEFAULT_TYPE_ATTRIBUTES darwin_set_default_type_attributes
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/* For 64-bit, we need to add 4 because @GOTPCREL is relative to the
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end of the instruction, but without the 4 we'd only have the right
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address for the start of the instruction. */
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#undef ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX
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#define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(FILE, ENCODING, SIZE, ADDR, DONE) \
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if (TARGET_64BIT) \
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{ \
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if ((SIZE) == 4 && ((ENCODING) & 0x70) == DW_EH_PE_pcrel) \
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{ \
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fputs (ASM_LONG, FILE); \
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assemble_name (FILE, XSTR (ADDR, 0)); \
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fputs ("+4@GOTPCREL", FILE); \
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goto DONE; \
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} \
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} \
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else \
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{ \
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if (ENCODING == ASM_PREFERRED_EH_DATA_FORMAT (2, 1)) \
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{ \
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darwin_non_lazy_pcrel (FILE, ADDR); \
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goto DONE; \
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} \
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}
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/* First available SYMBOL flag bit for use by subtargets. */
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#define SYMBOL_FLAG_SUBT_DEP (SYMBOL_FLAG_MACH_DEP << 5)
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#undef MACHOPIC_NL_SYMBOL_PTR_SECTION
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#define MACHOPIC_NL_SYMBOL_PTR_SECTION \
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".section __IMPORT,__pointers,non_lazy_symbol_pointers"
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#define SUBTARGET32_DEFAULT_CPU "i686"
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#undef SUBTARGET_INIT_BUILTINS
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#define SUBTARGET_INIT_BUILTINS \
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do { \
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ix86_builtins[(int) IX86_BUILTIN_CFSTRING] \
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= darwin_init_cfstring_builtins ((unsigned) (IX86_BUILTIN_CFSTRING)); \
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darwin_rename_builtins (); \
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} while(0)
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/* Define the shadow offset for asan. */
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#undef SUBTARGET_SHADOW_OFFSET
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#define SUBTARGET_SHADOW_OFFSET \
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(TARGET_LP64 ? HOST_WIDE_INT_1 << 44 : HOST_WIDE_INT_1 << 29)
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