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

/* ELF object file format.
   Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
   2002, 2003, 2004, 2006, 2007 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 2, 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, 51 Franklin Street - Fifth Floor, Boston, MA
   02110-1301, 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

/* Note that all macros in this file should be wrapped in #ifndef, for
   sake of obj-multi.h which includes this file.  */

#ifndef OUTPUT_FLAVOR
#define OUTPUT_FLAVOR bfd_target_elf_flavour
#endif

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

#include "targ-cpu.h"

#ifdef TC_ALPHA
#define ECOFF_DEBUGGING (alpha_flag_mdebug > 0)
extern int alpha_flag_mdebug;
#endif

/* For now, always set ECOFF_DEBUGGING for a MIPS target.  */
#ifdef TC_MIPS
#define ECOFF_DEBUGGING mips_flag_mdebug
extern int mips_flag_mdebug;
#endif /* TC_MIPS */

#ifdef OBJ_MAYBE_ECOFF
#ifndef ECOFF_DEBUGGING
#define ECOFF_DEBUGGING 1
#endif
#endif

/* Additional information we keep for each symbol.  */
struct elf_obj_sy
{
  /* Whether the symbol has been marked as local.  */
  int local;

  /* 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;

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

#define OBJ_SYMFIELD_TYPE struct elf_obj_sy

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

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

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

#ifndef obj_begin
#define obj_begin() elf_begin ()
#endif
extern void elf_begin (void);

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

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

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

int elf_s_get_other (symbolS *);
#ifndef S_GET_OTHER
#define S_GET_OTHER(S)	(elf_s_get_other (S))
#endif
#ifndef S_SET_OTHER
#define S_SET_OTHER(S,V) \
  (elf_symbol (symbol_get_bfdsym (S))->internal_elf_sym.st_other = (V))
#endif

extern asection *gdb_section;

#ifndef obj_frob_file
#define obj_frob_file  elf_frob_file
#endif
extern void elf_frob_file (void);

#ifndef obj_frob_file_before_adjust
#define obj_frob_file_before_adjust  elf_frob_file_before_adjust
#endif
extern void elf_frob_file_before_adjust (void);

#ifndef obj_frob_file_after_relocs
#define obj_frob_file_after_relocs  elf_frob_file_after_relocs
#endif
extern void elf_frob_file_after_relocs (void);

/* If the target doesn't have special processing for labels, take care of
   dwarf2 output at the object file level.  */
#ifndef tc_frob_label
#include "dwarf2dbg.h"
#define obj_frob_label  dwarf2_emit_label
#endif

#ifndef obj_app_file
#define obj_app_file elf_file_symbol
#endif
extern void elf_file_symbol (const char *, int);

extern void obj_elf_section_change_hook (void);

extern void obj_elf_section (int);
extern void obj_elf_previous (int);
extern void obj_elf_version (int);
extern void obj_elf_common (int);
extern void obj_elf_data (int);
extern void obj_elf_text (int);
extern void obj_elf_change_section
  (const char *, int, int, int, const char *, int, int);
extern struct fix *obj_elf_vtable_inherit (int);
extern struct fix *obj_elf_vtable_entry (int);

/* BFD wants to write the udata field, which is a no-no for the
   predefined section symbols in bfd/section.c.  They are read-only.  */
#ifndef obj_sec_sym_ok_for_reloc
#define obj_sec_sym_ok_for_reloc(SEC)	((SEC)->owner != 0)
#endif

void elf_obj_read_begin_hook (void);
#ifndef obj_read_begin_hook
#define obj_read_begin_hook	elf_obj_read_begin_hook
#endif

void elf_obj_symbol_new_hook (symbolS *);
#ifndef obj_symbol_new_hook
#define obj_symbol_new_hook	elf_obj_symbol_new_hook
#endif

void elf_copy_symbol_attributes (symbolS *, symbolS *);
#ifndef OBJ_COPY_SYMBOL_ATTRIBUTES
#define OBJ_COPY_SYMBOL_ATTRIBUTES(DEST, SRC) \
  (elf_copy_symbol_attributes (DEST, SRC))
#endif

#ifndef SEPARATE_STAB_SECTIONS
/* Avoid ifndef each separate macro setting by wrapping the whole of the
   stab group on the assumption that whoever sets SEPARATE_STAB_SECTIONS
   caters to ECOFF_DEBUGGING and the right setting of INIT_STAB_SECTIONS
   and OBJ_PROCESS_STAB too, without needing the tweaks below.  */

/* 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 (segT);
#define INIT_STAB_SECTION(seg) obj_elf_init_stab_section (seg)

#ifdef ECOFF_DEBUGGING
/* 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)))

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

#endif /* SEPARATE_STAB_SECTIONS not defined.  */

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

extern void elf_pop_insert (void);
#ifndef obj_pop_insert
#define obj_pop_insert()	elf_pop_insert()
#endif

#ifndef OBJ_MAYBE_ELF
/* If OBJ_MAYBE_ELF then obj-multi.h will define obj_ecoff_set_ext.  */
#define obj_ecoff_set_ext elf_ecoff_set_ext
struct ecoff_extr;
extern void elf_ecoff_set_ext (symbolS *, struct ecoff_extr *);
#endif
extern asection *elf_com_section_ptr;
extern symbolS * elf_common_parse (int ignore ATTRIBUTE_UNUSED, symbolS *symbolP,
				   addressT size);

#endif /* _OBJ_ELF_H */