binutils-gdb/gas/config/obj-elf.h

/* ELF object file format.
   Copyright (C) 1992, 93, 94, 95, 96, 1997 Free Software Foundation, Inc.

   This file is part of GAS, the GNU Assembler.

   GAS 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 1, or (at your option)
   any later version.

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


/* HP PA-RISC support was contributed by the Center for Software Science
   at the University of Utah.  */

#ifndef _OBJ_ELF_H
#define _OBJ_ELF_H

#define OBJ_ELF 1

#define OUTPUT_FLAVOR bfd_target_elf_flavour

#include <bfd.h>

#define BYTES_IN_WORD 4		/* for now */
#include "bfd/elf-bfd.h"

/* Additional information we keep for each symbol.  */

/* FIXME: For some reason, this structure is needed both here and in
   obj-multi.h.  */
#ifndef OBJ_SYMFIELD_TYPE
struct elf_obj_sy
{
  /* Use this to keep track of .size expressions that involve
     differences that we can't compute yet.  */
  expressionS *size;

  /* The name specified by the .symver directive.  */
  char *versioned_name;
};
#endif

#define OBJ_SYMFIELD_TYPE struct elf_obj_sy

/* Symbol fields used by the ELF back end.  */
#define ELF_TARGET_SYMBOL_FIELDS int local:1;

/* Don't change this; change ELF_TARGET_SYMBOL_FIELDS instead.  */
#define TARGET_SYMBOL_FIELDS ELF_TARGET_SYMBOL_FIELDS

#include "targ-cpu.h"

#ifndef FALSE
#define FALSE 0
#define TRUE  !FALSE
#endif

#define obj_begin() elf_begin ()
extern void elf_begin PARAMS ((void));

/* should be conditional on address size! */
#define elf_symbol(asymbol) ((elf_symbol_type *)(&(asymbol)->the_bfd))

#define S_GET_SIZE(S) (elf_symbol ((S)->bsym)->internal_elf_sym.st_size)
#define S_SET_SIZE(S,V) \
  (elf_symbol((S)->bsym)->internal_elf_sym.st_size = (V))

#define S_GET_ALIGN(S) (elf_symbol ((S)->bsym)->internal_elf_sym.st_value)
#define S_SET_ALIGN(S,V) \
  (elf_symbol ((S)->bsym)->internal_elf_sym.st_value = (V))

#define S_GET_OTHER(S) (elf_symbol ((S)->bsym)->internal_elf_sym.st_other)
#define S_SET_OTHER(S,V) \
  (elf_symbol ((S)->bsym)->internal_elf_sym.st_other = (V))

extern asection *gdb_section;

#define obj_frob_file  elf_frob_file
extern void elf_frob_file PARAMS ((void));

#define obj_frob_file_after_relocs  elf_frob_file_after_relocs
extern void elf_frob_file_after_relocs PARAMS ((void));

#define obj_app_file elf_file_symbol
extern void elf_file_symbol PARAMS ((char *));

extern void obj_elf_section_change_hook PARAMS ((void));

extern void obj_elf_section PARAMS ((int));
extern void obj_elf_previous PARAMS ((int));
extern void obj_elf_version PARAMS ((int));

/* BFD wants to write the udata field, which is a no-no for the
   globally defined sections.  */
#define obj_sec_sym_ok_for_reloc(SEC)	((SEC)->owner != 0)

/* When setting one symbol equal to another, by default we probably
   want them to have the same "size", whatever it means in the current
   context.  */
#define OBJ_COPY_SYMBOL_ATTRIBUTES(DEST,SRC)			\
do								\
  {								\
    if ((SRC)->sy_obj.size)					\
      {								\
	if ((DEST)->sy_obj.size == NULL)			\
	  (DEST)->sy_obj.size =					\
	    (expressionS *) xmalloc (sizeof (expressionS));	\
	*(DEST)->sy_obj.size = *(SRC)->sy_obj.size;		\
      }								\
    else							\
      {								\
	if ((DEST)->sy_obj.size != NULL)			\
	  free ((DEST)->sy_obj.size);				\
	(DEST)->sy_obj.size = NULL;				\
      }								\
    S_SET_SIZE ((DEST), S_GET_SIZE (SRC));			\
    S_SET_OTHER ((DEST), S_GET_OTHER (SRC));			\
  }								\
while (0)

/* Stabs go in a separate section.  */
#define SEPARATE_STAB_SECTIONS 1

/* We need 12 bytes at the start of the section to hold some initial
   information.  */
extern void obj_elf_init_stab_section PARAMS ((segT));
#define INIT_STAB_SECTION(seg) obj_elf_init_stab_section (seg)

#ifdef TC_ALPHA
#define ECOFF_DEBUGGING alpha_flag_mdebug
extern int alpha_flag_mdebug;
#endif

/* For now, always set ECOFF_DEBUGGING for a MIPS target.  */
#ifdef TC_MIPS
#ifdef MIPS_STABS_ELF
#define ECOFF_DEBUGGING 0
#else
#define ECOFF_DEBUGGING 1
#endif /* MIPS_STABS_ELF */
#endif /* TC_MIPS */

#ifdef ECOFF_DEBUGGING
/* If we are generating ECOFF debugging information, we need some
   additional fields for each symbol.  */
#undef TARGET_SYMBOL_FIELDS
#define TARGET_SYMBOL_FIELDS \
  ELF_TARGET_SYMBOL_FIELDS \
  struct efdr *ecoff_file; \
  struct localsym *ecoff_symbol; \
  valueT ecoff_extern_size;

/* We smuggle stabs in ECOFF rather than using a separate section.
   The Irix linker can not handle a separate stabs section.  */

#undef  SEPARATE_STAB_SECTIONS
#define SEPARATE_STAB_SECTIONS (!ECOFF_DEBUGGING)

#undef  INIT_STAB_SECTION
#define INIT_STAB_SECTION(seg) \
  ((void)(ECOFF_DEBUGGING ? 0 : (obj_elf_init_stab_section (seg), 0)))

#define OBJ_PROCESS_STAB(seg, what, string, type, other, desc)		\
  if (ECOFF_DEBUGGING)							\
    ecoff_stab ((seg), (what), (string), (type), (other), (desc))
#endif /* ECOFF_DEBUGGING */

extern void elf_frob_symbol PARAMS ((struct symbol *, int *));
#ifndef obj_frob_symbol
#define obj_frob_symbol(symp, punt) elf_frob_symbol (symp, &punt)
#endif

extern void elf_pop_insert PARAMS ((void));
#define obj_pop_insert()	elf_pop_insert()

#ifndef OBJ_MAYBE_ELF
#define obj_ecoff_set_ext elf_ecoff_set_ext
#ifdef ANSI_PROTOTYPES
struct ecoff_extr;
#endif
extern void elf_ecoff_set_ext PARAMS ((struct symbol *, struct ecoff_extr *));
#endif

#endif /* _OBJ_ELF_H */