This is aout-target.h in view mode; [Download] [Up]
/* Define a target vector and some small routines for a variant of a.out.
Copyright (C) 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
This program 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 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "aout/aout64.h"
#include "aout/stab_gnu.h"
#include "aout/ar.h"
/*#include "libaout.h"*/
extern CONST struct reloc_howto_struct * NAME(aout,reloc_type_lookup) ();
/* Set parameters about this a.out file that are machine-dependent.
This routine is called from some_aout_object_p just before it returns. */
#ifndef MY_callback
static bfd_target *
MY(callback) (abfd)
bfd *abfd;
{
struct internal_exec *execp = exec_hdr (abfd);
/* Calculate the file positions of the parts of a newly read aout header */
obj_textsec (abfd)->_raw_size = N_TXTSIZE(*execp);
/* The virtual memory addresses of the sections */
obj_textsec (abfd)->vma = N_TXTADDR(*execp);
obj_datasec (abfd)->vma = N_DATADDR(*execp);
obj_bsssec (abfd)->vma = N_BSSADDR(*execp);
/* The file offsets of the sections */
obj_textsec (abfd)->filepos = N_TXTOFF (*execp);
obj_datasec (abfd)->filepos = N_DATOFF (*execp);
/* The file offsets of the relocation info */
obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp);
obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp);
/* The file offsets of the string table and symbol table. */
obj_sym_filepos (abfd) = N_SYMOFF (*execp);
obj_str_filepos (abfd) = N_STROFF (*execp);
/* Determine the architecture and machine type of the object file. */
#ifdef SET_ARCH_MACH
SET_ARCH_MACH(abfd, *execp);
#else
bfd_default_set_arch_mach(abfd, DEFAULT_ARCH, 0);
#endif
/* Don't set sizes now -- can't be sure until we know arch & mach.
Sizes get set in set_sizes callback, later. */
#if 0
adata(abfd).page_size = PAGE_SIZE;
#ifdef SEGMENT_SIZE
adata(abfd).segment_size = SEGMENT_SIZE;
#else
adata(abfd).segment_size = PAGE_SIZE;
#endif
adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
#endif
return abfd->xvec;
}
#endif
#ifndef MY_object_p
/* Finish up the reading of an a.out file header */
static bfd_target *
MY(object_p) (abfd)
bfd *abfd;
{
struct external_exec exec_bytes; /* Raw exec header from file */
struct internal_exec exec; /* Cleaned-up exec header */
bfd_target *target;
if (bfd_read ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd)
!= EXEC_BYTES_SIZE) {
if (bfd_get_error () != bfd_error_system_call)
bfd_set_error (bfd_error_wrong_format);
return 0;
}
#ifdef SWAP_MAGIC
exec.a_info = SWAP_MAGIC (exec_bytes.e_info);
#else
exec.a_info = bfd_h_get_32 (abfd, exec_bytes.e_info);
#endif /* SWAP_MAGIC */
if (N_BADMAG (exec)) return 0;
#ifdef MACHTYPE_OK
if (!(MACHTYPE_OK (N_MACHTYPE (exec)))) return 0;
#endif
NAME(aout,swap_exec_header_in)(abfd, &exec_bytes, &exec);
target = NAME(aout,some_aout_object_p) (abfd, &exec, MY(callback));
#ifdef ENTRY_CAN_BE_ZERO
/* The NEWSOS3 entry-point is/was 0, which (amongst other lossage)
* means that it isn't obvious if EXEC_P should be set.
* All of the following must be true for an executable:
* There must be no relocations, the bfd can be neither an
* archive nor an archive element, and the file must be executable. */
if (exec.a_trsize + exec.a_drsize == 0
&& bfd_get_format(abfd) == bfd_object && abfd->my_archive == NULL)
{
struct stat buf;
#ifndef S_IXUSR
#define S_IXUSR 0100 /* Execute by owner. */
#endif
if (stat(abfd->filename, &buf) == 0 && (buf.st_mode & S_IXUSR))
abfd->flags |= EXEC_P;
}
#endif /* ENTRY_CAN_BE_ZERO */
return target;
}
#define MY_object_p MY(object_p)
#endif
#ifndef MY_mkobject
static boolean
MY(mkobject) (abfd)
bfd *abfd;
{
if (NAME(aout,mkobject)(abfd) == false)
return false;
#if 0 /* Sizes get set in set_sizes callback, later, after we know
the architecture and machine. */
adata(abfd).page_size = PAGE_SIZE;
#ifdef SEGMENT_SIZE
adata(abfd).segment_size = SEGMENT_SIZE;
#else
adata(abfd).segment_size = PAGE_SIZE;
#endif
adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
#endif
return true;
}
#define MY_mkobject MY(mkobject)
#endif
/* Write an object file.
Section contents have already been written. We write the
file header, symbols, and relocation. */
#ifndef MY_write_object_contents
static boolean
MY(write_object_contents) (abfd)
bfd *abfd;
{
struct external_exec exec_bytes;
struct internal_exec *execp = exec_hdr (abfd);
#if CHOOSE_RELOC_SIZE
CHOOSE_RELOC_SIZE(abfd);
#else
obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
#endif
WRITE_HEADERS(abfd, execp);
return true;
}
#define MY_write_object_contents MY(write_object_contents)
#endif
#ifndef MY_set_sizes
static boolean
MY(set_sizes) (abfd)
bfd *abfd;
{
adata(abfd).page_size = PAGE_SIZE;
#ifdef SEGMENT_SIZE
adata(abfd).segment_size = SEGMENT_SIZE;
#else
adata(abfd).segment_size = PAGE_SIZE;
#endif
adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
return true;
}
#define MY_set_sizes MY(set_sizes)
#endif
#ifndef MY_exec_hdr_flags
#define MY_exec_hdr_flags 0
#endif
#ifndef MY_backend_data
static CONST struct aout_backend_data MY(backend_data) = {
0, /* zmagic contiguous */
0, /* text incl header */
MY_exec_hdr_flags,
0, /* text vma? */
MY_set_sizes,
0, /* exec header is counted */
};
#define MY_backend_data &MY(backend_data)
#endif
#ifndef MY_bfd_final_link
/* Final link routine. We need to use a call back to get the correct
offsets in the output file. */
static void final_link_callback
PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *));
static void
final_link_callback (abfd, ptreloff, pdreloff, psymoff)
bfd *abfd;
file_ptr *ptreloff;
file_ptr *pdreloff;
file_ptr *psymoff;
{
struct internal_exec *execp = exec_hdr (abfd);
*ptreloff = N_TRELOFF (*execp);
*pdreloff = N_DRELOFF (*execp);
*psymoff = N_SYMOFF (*execp);
}
static boolean
MY_bfd_final_link (abfd, info)
bfd *abfd;
struct bfd_link_info *info;
{
return NAME(aout,final_link) (abfd, info, final_link_callback);
}
#endif
/* We assume BFD generic archive files. */
#ifndef MY_openr_next_archived_file
#define MY_openr_next_archived_file bfd_generic_openr_next_archived_file
#endif
#ifndef MY_generic_stat_arch_elt
#define MY_generic_stat_arch_elt bfd_generic_stat_arch_elt
#endif
#ifndef MY_slurp_armap
#define MY_slurp_armap bfd_slurp_bsd_armap
#endif
#ifndef MY_slurp_extended_name_table
#define MY_slurp_extended_name_table _bfd_slurp_extended_name_table
#endif
#ifndef MY_write_armap
#define MY_write_armap bsd_write_armap
#endif
#ifndef MY_truncate_arname
#define MY_truncate_arname bfd_bsd_truncate_arname
#endif
/* No core file defined here -- configure in trad-core.c separately. */
#ifndef MY_core_file_failing_command
#define MY_core_file_failing_command _bfd_nocore_core_file_failing_command
#endif
#ifndef MY_core_file_failing_signal
#define MY_core_file_failing_signal _bfd_nocore_core_file_failing_signal
#endif
#ifndef MY_core_file_matches_executable_p
#define MY_core_file_matches_executable_p \
_bfd_nocore_core_file_matches_executable_p
#endif
#ifndef MY_core_file_p
#define MY_core_file_p _bfd_dummy_target
#endif
#ifndef MY_bfd_debug_info_start
#define MY_bfd_debug_info_start bfd_void
#endif
#ifndef MY_bfd_debug_info_end
#define MY_bfd_debug_info_end bfd_void
#endif
#ifndef MY_bfd_debug_info_accumulate
#define MY_bfd_debug_info_accumulate \
(void (*) PARAMS ((bfd*, struct sec *))) bfd_void
#endif
#ifndef MY_core_file_failing_command
#define MY_core_file_failing_command NAME(aout,core_file_failing_command)
#endif
#ifndef MY_core_file_failing_signal
#define MY_core_file_failing_signal NAME(aout,core_file_failing_signal)
#endif
#ifndef MY_core_file_matches_executable_p
#define MY_core_file_matches_executable_p NAME(aout,core_file_matches_executable_p)
#endif
#ifndef MY_set_section_contents
#define MY_set_section_contents NAME(aout,set_section_contents)
#endif
#ifndef MY_get_section_contents
#define MY_get_section_contents NAME(aout,get_section_contents)
#endif
#ifndef MY_new_section_hook
#define MY_new_section_hook NAME(aout,new_section_hook)
#endif
#ifndef MY_get_symtab_upper_bound
#define MY_get_symtab_upper_bound NAME(aout,get_symtab_upper_bound)
#endif
#ifndef MY_get_symtab
#define MY_get_symtab NAME(aout,get_symtab)
#endif
#ifndef MY_get_reloc_upper_bound
#define MY_get_reloc_upper_bound NAME(aout,get_reloc_upper_bound)
#endif
#ifndef MY_canonicalize_reloc
#define MY_canonicalize_reloc NAME(aout,canonicalize_reloc)
#endif
#ifndef MY_make_empty_symbol
#define MY_make_empty_symbol NAME(aout,make_empty_symbol)
#endif
#ifndef MY_print_symbol
#define MY_print_symbol NAME(aout,print_symbol)
#endif
#ifndef MY_get_symbol_info
#define MY_get_symbol_info NAME(aout,get_symbol_info)
#endif
#ifndef MY_get_lineno
#define MY_get_lineno NAME(aout,get_lineno)
#endif
#ifndef MY_set_arch_mach
#define MY_set_arch_mach NAME(aout,set_arch_mach)
#endif
#ifndef MY_find_nearest_line
#define MY_find_nearest_line NAME(aout,find_nearest_line)
#endif
#ifndef MY_sizeof_headers
#define MY_sizeof_headers NAME(aout,sizeof_headers)
#endif
#ifndef MY_bfd_get_relocated_section_contents
#define MY_bfd_get_relocated_section_contents \
bfd_generic_get_relocated_section_contents
#endif
#ifndef MY_bfd_relax_section
#define MY_bfd_relax_section bfd_generic_relax_section
#endif
#ifndef MY_bfd_reloc_type_lookup
#define MY_bfd_reloc_type_lookup NAME(aout,reloc_type_lookup)
#endif
#ifndef MY_bfd_make_debug_symbol
#define MY_bfd_make_debug_symbol 0
#endif
#ifndef MY_bfd_link_hash_table_create
#define MY_bfd_link_hash_table_create NAME(aout,link_hash_table_create)
#endif
#ifndef MY_bfd_link_add_symbols
#define MY_bfd_link_add_symbols NAME(aout,link_add_symbols)
#endif
#ifndef MY_bfd_copy_private_section_data
#define MY_bfd_copy_private_section_data \
_bfd_generic_bfd_copy_private_section_data
#endif
#ifndef MY_bfd_copy_private_bfd_data
#define MY_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
#endif
#ifndef MY_bfd_is_local_label
#define MY_bfd_is_local_label bfd_generic_is_local_label
#endif
#ifndef MY_bfd_free_cached_info
#define MY_bfd_free_cached_info NAME(aout,bfd_free_cached_info)
#endif
#ifndef MY_close_and_cleanup
#define MY_close_and_cleanup MY_bfd_free_cached_info
#endif
#ifndef MY_get_dynamic_symtab_upper_bound
#define MY_get_dynamic_symtab_upper_bound \
_bfd_nodynamic_get_dynamic_symtab_upper_bound
#endif
#ifndef MY_canonicalize_dynamic_symtab
#define MY_canonicalize_dynamic_symtab \
_bfd_nodynamic_canonicalize_dynamic_symtab
#endif
#ifndef MY_get_dynamic_reloc_upper_bound
#define MY_get_dynamic_reloc_upper_bound \
_bfd_nodynamic_get_dynamic_reloc_upper_bound
#endif
#ifndef MY_canonicalize_dynamic_reloc
#define MY_canonicalize_dynamic_reloc \
_bfd_nodynamic_canonicalize_dynamic_reloc
#endif
/* Aout symbols normally have leading underscores */
#ifndef MY_symbol_leading_char
#define MY_symbol_leading_char '_'
#endif
/* Aout archives normally use spaces for padding */
#ifndef AR_PAD_CHAR
#define AR_PAD_CHAR ' '
#endif
#ifndef MY_BFD_TARGET
bfd_target MY(vec) =
{
TARGETNAME, /* name */
bfd_target_aout_flavour,
#ifdef TARGET_IS_BIG_ENDIAN_P
true, /* target byte order (big) */
true, /* target headers byte order (big) */
#else
false, /* target byte order (little) */
false, /* target headers byte order (little) */
#endif
(HAS_RELOC | EXEC_P | /* object flags */
HAS_LINENO | HAS_DEBUG |
HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
MY_symbol_leading_char,
AR_PAD_CHAR, /* ar_pad_char */
15, /* ar_max_namelen */
3, /* minimum alignment */
#ifdef TARGET_IS_BIG_ENDIAN_P
bfd_getb64, bfd_getb_signed_64, bfd_putb64,
bfd_getb32, bfd_getb_signed_32, bfd_putb32,
bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
bfd_getb64, bfd_getb_signed_64, bfd_putb64,
bfd_getb32, bfd_getb_signed_32, bfd_putb32,
bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
#else
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
#endif
{_bfd_dummy_target, MY_object_p, /* bfd_check_format */
bfd_generic_archive_p, MY_core_file_p},
{bfd_false, MY_mkobject, /* bfd_set_format */
_bfd_generic_mkarchive, bfd_false},
{bfd_false, MY_write_object_contents, /* bfd_write_contents */
_bfd_write_archive_contents, bfd_false},
BFD_JUMP_TABLE_GENERIC (MY),
BFD_JUMP_TABLE_COPY (MY),
BFD_JUMP_TABLE_CORE (MY),
BFD_JUMP_TABLE_ARCHIVE (MY),
BFD_JUMP_TABLE_SYMBOLS (MY),
BFD_JUMP_TABLE_RELOCS (MY),
BFD_JUMP_TABLE_WRITE (MY),
BFD_JUMP_TABLE_LINK (MY),
BFD_JUMP_TABLE_DYNAMIC (MY),
(PTR) MY_backend_data,
};
#endif /* MY_BFD_TARGET */
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