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246 lines
8.5 KiB
C
246 lines
8.5 KiB
C
/* Target definitions for x86 running Darwin.
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Copyright (C) 2001, 2002, 2004, 2005 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 2, 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 COPYING. If not, write to
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the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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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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#define TARGET_VERSION fprintf (stderr, " (i686 Darwin)");
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#undef TARGET_64BIT
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#define TARGET_64BIT (target_flags & MASK_64BIT)
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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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/* Size of the Obj-C jump buffer. */
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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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#define TARGET_OS_CPP_BUILTINS() \
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do \
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{ \
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builtin_define ("__LITTLE_ENDIAN__"); \
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darwin_cpp_builtins (pfile); \
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} \
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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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#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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/* 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 "%{!mkernel:%{!static:%{!mdynamic-no-pic:-fPIC}}} \
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%{g: %{!fno-eliminate-unused-debug-symbols: -feliminate-unused-debug-symbols }}"
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#undef ASM_SPEC
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#define ASM_SPEC "-arch %(darwin_arch) -force_cpusubtype_ALL"
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#define DARWIN_ARCH_SPEC "%{m64:x86_64;:i386}"
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#define DARWIN_SUBARCH_SPEC DARWIN_ARCH_SPEC
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#undef SUBTARGET_EXTRA_SPECS
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#define SUBTARGET_EXTRA_SPECS \
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{ "darwin_arch", DARWIN_ARCH_SPEC }, \
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{ "darwin_crt2", "" }, \
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{ "darwin_subarch", DARWIN_SUBARCH_SPEC },
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/* Use the following macro for any Darwin/x86-specific command-line option
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translation. */
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#define SUBTARGET_OPTION_TRANSLATE_TABLE \
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{ "", "" }
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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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extern void darwin_x86_file_end (void);
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#undef TARGET_ASM_FILE_END
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#define TARGET_ASM_FILE_END darwin_x86_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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#define TARGET_SUBTARGET_DEFAULT (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_128BIT_LONG_DOUBLE)
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/* For now, disable dynamic-no-pic. We'll need to go through i386.c
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with a fine-tooth comb looking for refs to flag_pic! */
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#define MASK_MACHO_DYNAMIC_NO_PIC 0
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#define TARGET_DYNAMIC_NO_PIC (target_flags & MASK_MACHO_DYNAMIC_NO_PIC)
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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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/* These are used by -fbranch-probabilities */
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#define HOT_TEXT_SECTION_NAME "__TEXT,__text,regular,pure_instructions"
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#define UNLIKELY_EXECUTED_TEXT_SECTION_NAME \
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"__TEXT,__unlikely,regular,pure_instructions"
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/* Assembler pseudos to introduce constants of various size. */
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#define ASM_BYTE_OP "\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 { 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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/* This says how to output an assembler line
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to define a global common symbol. */
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#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
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( fputs (".comm ", (FILE)), \
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assemble_name ((FILE), (NAME)), \
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fprintf ((FILE), ",%lu\n", (unsigned long)(ROUNDED)))
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/* This says how to output an assembler line
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to define a local common symbol. */
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#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
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( fputs (".lcomm ", (FILE)), \
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assemble_name ((FILE), (NAME)), \
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fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED"\n", (ROUNDED)))
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/* Darwin profiling -- call mcount. */
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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 (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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machopic_validate_stub_or_non_lazy_ptr (name); \
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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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/* Darwin on x86_64 uses dwarf-2 by default. */
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#undef PREFERRED_DEBUGGING_TYPE
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#define PREFERRED_DEBUGGING_TYPE (TARGET_64BIT ? DWARF2_DEBUG : DBX_DEBUG)
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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_TARGET_PRAGMAS
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#define REGISTER_TARGET_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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/* This needs to move since i386 uses the first flag and other flags are
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used in Mach-O. */
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#undef MACHO_SYMBOL_FLAG_VARIABLE
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#define MACHO_SYMBOL_FLAG_VARIABLE ((SYMBOL_FLAG_MACH_DEP) << 3)
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