linux.h

Mac OS X 10.4.9 for x86 Source Code gcc 实现源代码

/* Definitions for MIPS running Linux-based GNU systems with ELF format.
   Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
   Free Software Foundation, 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 2, 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 COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

#undef WCHAR_TYPE
#define WCHAR_TYPE "int"

#undef WCHAR_TYPE_SIZE
#define WCHAR_TYPE_SIZE 32

/* If defined, a C expression whose value is a string containing the
   assembler operation to identify the following data as
   uninitialized global data.  If not defined, and neither
   `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
   uninitialized global data will be output in the data section if
   `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
   used.  */
#define BSS_SECTION_ASM_OP	"\t.section\t.bss"

#define ASM_OUTPUT_ALIGNED_BSS mips_output_aligned_bss

#undef ASM_DECLARE_OBJECT_NAME
#define ASM_DECLARE_OBJECT_NAME mips_declare_object_name

#undef TARGET_VERSION
#if TARGET_ENDIAN_DEFAULT == 0
#define TARGET_VERSION fprintf (stderr, " (MIPSel GNU/Linux with ELF)");
#else
#define TARGET_VERSION fprintf (stderr, " (MIPS GNU/Linux with ELF)");
#endif

#undef MD_EXEC_PREFIX
#undef MD_STARTFILE_PREFIX

/* If we don't set MASK_ABICALLS, we can't default to PIC.  */
#undef TARGET_DEFAULT
#define TARGET_DEFAULT MASK_ABICALLS

#define TARGET_OS_CPP_BUILTINS()				\
    do {							\
	LINUX_TARGET_OS_CPP_BUILTINS();				\
	if (TARGET_ABICALLS)					\
	  {							\
	    builtin_define ("__PIC__");				\
	    builtin_define ("__pic__");				\
	  }							\
	/* The GNU C++ standard library requires this.  */	\
	if (c_dialect_cxx ())					\
	  builtin_define ("_GNU_SOURCE");			\
								\
      if (mips_abi == ABI_N32)					\
      {								\
        builtin_define ("_ABIN32=2");				\
        builtin_define ("_MIPS_SIM=_ABIN32");			\
        builtin_define ("_MIPS_SZLONG=32");			\
        builtin_define ("_MIPS_SZPTR=32");			\
      }								\
     else if (mips_abi == ABI_64)				\
      {								\
        builtin_define ("_ABI64=3");				\
        builtin_define ("_MIPS_SIM=_ABI64");			\
        builtin_define ("_MIPS_SZLONG=64");			\
        builtin_define ("_MIPS_SZPTR=64");			\
      }								\
     else							\
      {								\
	builtin_define ("_ABIO32=1");			\
	builtin_define ("_MIPS_SIM=_ABIO32");		\
        builtin_define ("_MIPS_SZLONG=32");			\
        builtin_define ("_MIPS_SZPTR=32");			\
      }								\
     if (TARGET_FLOAT64)					\
        builtin_define ("_MIPS_FPSET=32");			\
     else							\
        builtin_define ("_MIPS_FPSET=16");			\
								\
     if (TARGET_INT64)						\
        builtin_define ("_MIPS_SZINT=64");			\
     else							\
        builtin_define ("_MIPS_SZINT=32");			\
} while (0)

#undef  SUBTARGET_CPP_SPEC
#define SUBTARGET_CPP_SPEC "%{pthread:-D_REENTRANT}"

/* From iris5.h */
/* -G is incompatible with -KPIC which is the default, so only allow objects
   in the small data section if the user explicitly asks for it.  */
#undef MIPS_DEFAULT_GVALUE
#define MIPS_DEFAULT_GVALUE 0

/* Borrowed from sparc/linux.h */
#undef LINK_SPEC
#define LINK_SPEC \
 "%(endian_spec) \
  %{shared:-shared} \
  %{!shared: \
    %{!ibcs: \
      %{!static: \
        %{rdynamic:-export-dynamic} \
        %{!dynamic-linker:-dynamic-linker /lib/ld.so.1}} \
        %{static:-static}}}"

#undef SUBTARGET_ASM_SPEC
#define SUBTARGET_ASM_SPEC "%{mabi=64: -64} %{!mno-abicalls:-KPIC}"

/* The MIPS assembler has different syntax for .set. We set it to
   .dummy to trap any errors.  */
#undef SET_ASM_OP
#define SET_ASM_OP "\t.dummy\t"

#undef ASM_OUTPUT_DEF
#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)				\
 do {									\
	fputc ( '\t', FILE);						\
	assemble_name (FILE, LABEL1);					\
	fputs ( " = ", FILE);						\
	assemble_name (FILE, LABEL2);					\
	fputc ( '\n', FILE);						\
 } while (0)

#undef ASM_DECLARE_FUNCTION_NAME
#define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL)			\
  do {									\
    if (!flag_inhibit_size_directive)					\
      {									\
	fputs ("\t.ent\t", STREAM);					\
	assemble_name (STREAM, NAME);					\
	putc ('\n', STREAM);						\
      }									\
    ASM_OUTPUT_TYPE_DIRECTIVE (STREAM, NAME, "function");		\
    assemble_name (STREAM, NAME);					\
    fputs (":\n", STREAM);						\
  } while (0)

#undef ASM_DECLARE_FUNCTION_SIZE
#define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL)			\
  do {									\
    if (!flag_inhibit_size_directive)					\
      {									\
	fputs ("\t.end\t", STREAM);					\
	assemble_name (STREAM, NAME);					\
	putc ('\n', STREAM);						\
      }									\
  } while (0)

/* Tell function_prologue in mips.c that we have already output the .ent/.end
   pseudo-ops.  */
#undef FUNCTION_NAME_ALREADY_DECLARED
#define FUNCTION_NAME_ALREADY_DECLARED 1

/* The glibc _mcount stub will save $v0 for us.  Don't mess with saving
   it, since ASM_OUTPUT_REG_PUSH/ASM_OUTPUT_REG_POP do not work in the
   presence of $gp-relative calls.  */
#undef ASM_OUTPUT_REG_PUSH
#undef ASM_OUTPUT_REG_POP

#undef LIB_SPEC
#define LIB_SPEC "\
%{shared: -lc} \
%{!shared: %{pthread:-lpthread} \
  %{profile:-lc_p} %{!profile: -lc}}"

#define MD_UNWIND_SUPPORT "config/mips/linux-unwind.h"