binutils-gdb/bfd/i386os9k.c

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1999-05-03 09:29:11 +02:00
/* BFD back-end for os9000 i386 binaries.
Copyright 1990, 91, 92, 93, 94, 95, 98, 1999 Free Software Foundation, Inc.
1999-05-03 09:29:11 +02:00
Written by Cygnus Support.
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "bfdlink.h"
#include "libaout.h" /* BFD a.out internal data structures */
#include "os9k.h"
static const bfd_target *os9k_callback PARAMS ((bfd *));
/* Swaps the information in an executable header taken from a raw byte
stream memory image, into the internal exec_header structure. */
boolean
os9k_swap_exec_header_in (abfd, raw_bytes, execp)
bfd *abfd;
mh_com *raw_bytes;
struct internal_exec *execp;
{
mh_com *bytes = (mh_com *) raw_bytes;
unsigned int dload, dmemsize, dmemstart;
/* Now fill in fields in the execp, from the bytes in the raw data. */
execp->a_info = bfd_h_get_16 (abfd, bytes->m_sync);
execp->a_syms = 0;
execp->a_entry = bfd_h_get_32 (abfd, bytes->m_exec);
execp->a_talign = 2;
execp->a_dalign = 2;
execp->a_balign = 2;
dload = bfd_h_get_32 (abfd, bytes->m_idata);
execp->a_data = dload + 8;
if (bfd_seek (abfd, (file_ptr) dload, SEEK_SET) != 0
|| (bfd_read (&dmemstart, sizeof (dmemstart), 1, abfd)
!= sizeof (dmemstart))
|| (bfd_read (&dmemsize, sizeof (dmemsize), 1, abfd)
!= sizeof (dmemsize)))
return false;
execp->a_tload = 0;
execp->a_dload = bfd_h_get_32 (abfd, (unsigned char *) &dmemstart);
execp->a_text = dload - execp->a_tload;
execp->a_data = bfd_h_get_32 (abfd, (unsigned char *) &dmemsize);
execp->a_bss = bfd_h_get_32 (abfd, bytes->m_data) - execp->a_data;
execp->a_trsize = 0;
execp->a_drsize = 0;
return true;
}
#if 0
/* Swaps the information in an internal exec header structure into the
supplied buffer ready for writing to disk. */
PROTO (void, os9k_swap_exec_header_out,
(bfd * abfd,
struct internal_exec * execp,
struct mh_com * raw_bytes));
void
os9k_swap_exec_header_out (abfd, execp, raw_bytes)
bfd *abfd;
struct internal_exec *execp;
mh_com *raw_bytes;
{
mh_com *bytes = (mh_com *) raw_bytes;
/* Now fill in fields in the raw data, from the fields in the exec struct. */
bfd_h_put_32 (abfd, execp->a_info, bytes->e_info);
bfd_h_put_32 (abfd, execp->a_text, bytes->e_text);
bfd_h_put_32 (abfd, execp->a_data, bytes->e_data);
bfd_h_put_32 (abfd, execp->a_bss, bytes->e_bss);
bfd_h_put_32 (abfd, execp->a_syms, bytes->e_syms);
bfd_h_put_32 (abfd, execp->a_entry, bytes->e_entry);
bfd_h_put_32 (abfd, execp->a_trsize, bytes->e_trsize);
bfd_h_put_32 (abfd, execp->a_drsize, bytes->e_drsize);
bfd_h_put_32 (abfd, execp->a_tload, bytes->e_tload);
bfd_h_put_32 (abfd, execp->a_dload, bytes->e_dload);
bytes->e_talign[0] = execp->a_talign;
bytes->e_dalign[0] = execp->a_dalign;
bytes->e_balign[0] = execp->a_balign;
bytes->e_relaxable[0] = execp->a_relaxable;
}
#endif /* 0 */
static const bfd_target *
os9k_object_p (abfd)
bfd *abfd;
{
struct internal_exec anexec;
mh_com exec_bytes;
if (bfd_read ((PTR) & exec_bytes, MHCOM_BYTES_SIZE, 1, abfd)
!= MHCOM_BYTES_SIZE)
{
if (bfd_get_error () != bfd_error_system_call)
bfd_set_error (bfd_error_wrong_format);
return 0;
}
anexec.a_info = bfd_h_get_16 (abfd, exec_bytes.m_sync);
if (N_BADMAG (anexec))
{
bfd_set_error (bfd_error_wrong_format);
return 0;
}
if (! os9k_swap_exec_header_in (abfd, &exec_bytes, &anexec))
{
if (bfd_get_error () != bfd_error_system_call)
bfd_set_error (bfd_error_wrong_format);
return NULL;
}
return aout_32_some_aout_object_p (abfd, &anexec, os9k_callback);
}
/* Finish up the opening of a b.out file for reading. Fill in all the
fields that are not handled by common code. */
static const bfd_target *
os9k_callback (abfd)
bfd *abfd;
{
struct internal_exec *execp = exec_hdr (abfd);
unsigned long bss_start;
/* Architecture and machine type */
bfd_set_arch_mach (abfd, bfd_arch_i386, 0);
/* The positions of the string table and symbol table. */
obj_str_filepos (abfd) = 0;
obj_sym_filepos (abfd) = 0;
/* The alignments of the sections */
obj_textsec (abfd)->alignment_power = execp->a_talign;
obj_datasec (abfd)->alignment_power = execp->a_dalign;
obj_bsssec (abfd)->alignment_power = execp->a_balign;
/* The starting addresses of the sections. */
obj_textsec (abfd)->vma = execp->a_tload;
obj_datasec (abfd)->vma = execp->a_dload;
/* And reload the sizes, since the aout module zaps them */
obj_textsec (abfd)->_raw_size = execp->a_text;
bss_start = execp->a_dload + execp->a_data; /* BSS = end of data section */
obj_bsssec (abfd)->vma = align_power (bss_start, execp->a_balign);
/* The file positions of the sections */
obj_textsec (abfd)->filepos = execp->a_entry;
obj_datasec (abfd)->filepos = execp->a_dload;
/* The file positions of the relocation info ***
obj_textsec (abfd)->rel_filepos = N_TROFF(*execp);
obj_datasec (abfd)->rel_filepos = N_DROFF(*execp);
*/
adata (abfd).page_size = 1; /* Not applicable. */
adata (abfd).segment_size = 1;/* Not applicable. */
adata (abfd).exec_bytes_size = MHCOM_BYTES_SIZE;
return abfd->xvec;
}
#if 0
struct bout_data_struct
{
struct aoutdata a;
struct internal_exec e;
};
static boolean
os9k_mkobject (abfd)
bfd *abfd;
{
struct bout_data_struct *rawptr;
rawptr = (struct bout_data_struct *) bfd_zalloc (abfd, sizeof (struct bout_data_struct));
if (rawptr == NULL)
return false;
abfd->tdata.bout_data = rawptr;
exec_hdr (abfd) = &rawptr->e;
obj_textsec (abfd) = (asection *) NULL;
obj_datasec (abfd) = (asection *) NULL;
obj_bsssec (abfd) = (asection *) NULL;
return true;
}
static boolean
os9k_write_object_contents (abfd)
bfd *abfd;
{
struct external_exec swapped_hdr;
if (! aout_32_make_sections (abfd))
return false;
exec_hdr (abfd)->a_info = BMAGIC;
exec_hdr (abfd)->a_text = obj_textsec (abfd)->_raw_size;
exec_hdr (abfd)->a_data = obj_datasec (abfd)->_raw_size;
exec_hdr (abfd)->a_bss = obj_bsssec (abfd)->_raw_size;
exec_hdr (abfd)->a_syms = bfd_get_symcount (abfd) * sizeof (struct nlist);
exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
exec_hdr (abfd)->a_trsize = ((obj_textsec (abfd)->reloc_count) *
sizeof (struct relocation_info));
exec_hdr (abfd)->a_drsize = ((obj_datasec (abfd)->reloc_count) *
sizeof (struct relocation_info));
exec_hdr (abfd)->a_talign = obj_textsec (abfd)->alignment_power;
exec_hdr (abfd)->a_dalign = obj_datasec (abfd)->alignment_power;
exec_hdr (abfd)->a_balign = obj_bsssec (abfd)->alignment_power;
exec_hdr (abfd)->a_tload = obj_textsec (abfd)->vma;
exec_hdr (abfd)->a_dload = obj_datasec (abfd)->vma;
bout_swap_exec_header_out (abfd, exec_hdr (abfd), &swapped_hdr);
if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
|| (bfd_write ((PTR) & swapped_hdr, 1, EXEC_BYTES_SIZE, abfd)
!= EXEC_BYTES_SIZE))
return false;
/* Now write out reloc info, followed by syms and strings */
if (bfd_get_symcount (abfd) != 0)
{
if (bfd_seek (abfd, (file_ptr) (N_SYMOFF (*exec_hdr (abfd))), SEEK_SET)
!= 0)
return false;
if (!aout_32_write_syms (abfd))
return false;
if (bfd_seek (abfd, (file_ptr) (N_TROFF (*exec_hdr (abfd))), SEEK_SET)
!= 0)
return false;
if (!b_out_squirt_out_relocs (abfd, obj_textsec (abfd)))
return false;
if (bfd_seek (abfd, (file_ptr) (N_DROFF (*exec_hdr (abfd))), SEEK_SET)
!= 0)
return false;
if (!b_out_squirt_out_relocs (abfd, obj_datasec (abfd)))
return false;
}
return true;
}
static boolean
os9k_set_section_contents (abfd, section, location, offset, count)
bfd *abfd;
sec_ptr section;
unsigned char *location;
file_ptr offset;
int count;
{
if (abfd->output_has_begun == false)
{ /* set by bfd.c handler */
if (! aout_32_make_sections (abfd))
return false;
obj_textsec (abfd)->filepos = sizeof (struct internal_exec);
obj_datasec (abfd)->filepos = obj_textsec (abfd)->filepos
+ obj_textsec (abfd)->_raw_size;
}
/* regardless, once we know what we're doing, we might as well get going */
if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0)
return false;
if (count != 0)
{
return (bfd_write ((PTR) location, 1, count, abfd) == count) ? true : false;
}
return true;
}
#endif /* 0 */
static int
os9k_sizeof_headers (ignore_abfd, ignore)
bfd *ignore_abfd ATTRIBUTE_UNUSED;
boolean ignore ATTRIBUTE_UNUSED;
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{
return sizeof (struct internal_exec);
}
/***********************************************************************/
#define aout_32_close_and_cleanup aout_32_bfd_free_cached_info
#define aout_32_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
#define aout_32_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
#define aout_32_get_section_contents_in_window \
_bfd_generic_get_section_contents_in_window
#define os9k_bfd_get_relocated_section_contents \
bfd_generic_get_relocated_section_contents
#define os9k_bfd_relax_section bfd_generic_relax_section
#define os9k_bfd_gc_sections bfd_generic_gc_sections
#define os9k_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
#define os9k_bfd_link_add_symbols _bfd_generic_link_add_symbols
#define os9k_bfd_final_link _bfd_generic_final_link
#define os9k_bfd_link_split_section _bfd_generic_link_split_section
const bfd_target i386os9k_vec =
{
"i386os9k", /* name */
bfd_target_os9k_flavour,
BFD_ENDIAN_LITTLE, /* data byte order is little */
BFD_ENDIAN_LITTLE, /* hdr byte order is little */
(HAS_RELOC | EXEC_P | WP_TEXT), /* object flags */
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD), /* section flags */
0, /* symbol leading char */
' ', /* ar_pad_char */
16, /* ar_max_namelen */
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 */
{_bfd_dummy_target, os9k_object_p, /* bfd_check_format */
bfd_generic_archive_p, _bfd_dummy_target},
{bfd_false, bfd_false, /* bfd_set_format */
_bfd_generic_mkarchive, bfd_false},
{bfd_false, bfd_false, /* bfd_write_contents */
_bfd_write_archive_contents, bfd_false},
BFD_JUMP_TABLE_GENERIC (aout_32),
BFD_JUMP_TABLE_COPY (_bfd_generic),
BFD_JUMP_TABLE_CORE (_bfd_nocore),
BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd),
BFD_JUMP_TABLE_SYMBOLS (aout_32),
BFD_JUMP_TABLE_RELOCS (aout_32),
BFD_JUMP_TABLE_WRITE (aout_32),
BFD_JUMP_TABLE_LINK (os9k),
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
NULL,
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(PTR) 0,
};