coff.h

gcc3.2.1源代码

/* Definitions of target machine for GNU compiler.
   For ARM with COFF object format.
   Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000
   Free Software Foundation, Inc.
   Contributed by Doug Evans ([e-mail]).
   
This file is part of GNU CC.

GNU CC 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.

GNU CC 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 GNU CC; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */


/* Note - it is important that this definition matches the one in tcoff.h */
#undef  USER_LABEL_PREFIX
#define USER_LABEL_PREFIX "_"


/* Run-time Target Specification.  */
#undef  TARGET_VERSION
#define TARGET_VERSION fputs (" (ARM/coff)", stderr)

#undef  TARGET_DEFAULT
#define TARGET_DEFAULT (ARM_FLAG_SOFT_FLOAT | ARM_FLAG_APCS_32 | ARM_FLAG_APCS_FRAME)

#ifndef MULTILIB_DEFAULTS
#define MULTILIB_DEFAULTS \
  { "marm", "mlittle-endian", "msoft-float", "mapcs-32", "mno-thumb-interwork" }
#endif

/* This is COFF, but prefer stabs.  */
#define SDB_DEBUGGING_INFO

#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG

#include "dbxcoff.h"

/* A C statement to output assembler commands which will identify the
   object file as having been compiled with GNU CC (or another GNU
   compiler).  */

/* This outputs a lot of .req's to define alias for various registers.
   Let's try to avoid this.  */
#undef ASM_FILE_START
#define ASM_FILE_START(STREAM)					\
  do								\
    {								\
      fprintf (STREAM, "%s Generated by gcc %s for ARM/coff\n",	\
	       ASM_COMMENT_START, version_string);		\
      fprintf (STREAM, ASM_APP_OFF);				\
    }								\
  while (0)

/* Switch into a generic section.  */
#define TARGET_ASM_NAMED_SECTION  default_coff_asm_named_section

/* Support the ctors/dtors and other sections.  */

#undef INIT_SECTION_ASM_OP

/* Define this macro if jump tables (for `tablejump' insns) should be
   output in the text section, along with the assembler instructions.
   Otherwise, the readonly data section is used.  */
/* We put ARM jump tables in the text section, because it makes the code
   more efficient, but for Thumb it's better to put them out of band.  */
#define JUMP_TABLES_IN_TEXT_SECTION (TARGET_ARM)

#undef  READONLY_DATA_SECTION
#define READONLY_DATA_SECTION	rdata_section
#undef  RDATA_SECTION_ASM_OP
#define RDATA_SECTION_ASM_OP	"\t.section .rdata"
#undef  CTORS_SECTION_ASM_OP
#define CTORS_SECTION_ASM_OP	"\t.section .ctors,\"x\""
#undef  DTORS_SECTION_ASM_OP
#define DTORS_SECTION_ASM_OP	"\t.section .dtors,\"x\""

/* A list of other sections which the compiler might be "in" at any
   given time.  */

#undef EXTRA_SECTIONS
#define EXTRA_SECTIONS SUBTARGET_EXTRA_SECTIONS in_rdata

#define SUBTARGET_EXTRA_SECTIONS

/* A list of extra section function definitions.  */

#undef EXTRA_SECTION_FUNCTIONS
#define EXTRA_SECTION_FUNCTIONS \
  RDATA_SECTION_FUNCTION	\
  SUBTARGET_EXTRA_SECTION_FUNCTIONS

#define SUBTARGET_EXTRA_SECTION_FUNCTIONS

#define RDATA_SECTION_FUNCTION \
void								\
rdata_section ()						\
{								\
  if (in_section != in_rdata)					\
    {								\
      fprintf (asm_out_file, "%s\n", RDATA_SECTION_ASM_OP);	\
      in_section = in_rdata;					\
    }								\
}

/* Support the ctors/dtors sections for g++.  */

/* __CTOR_LIST__ and __DTOR_LIST__ must be defined by the linker script.  */
#define CTOR_LISTS_DEFINED_EXTERNALLY

#undef DO_GLOBAL_CTORS_BODY
#undef DO_GLOBAL_DTORS_BODY

/* The ARM development system defines __main.  */
#define NAME__MAIN  "__gccmain"
#define SYMBOL__MAIN __gccmain

#define SUPPORTS_INIT_PRIORITY 0