226 lines
7.6 KiB
C
226 lines
7.6 KiB
C
/* BFD back-end for os9000 i386 binaries.
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Copyright (C) 1990-2015 Free Software Foundation, Inc.
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Written by Cygnus Support.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "libbfd.h"
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#include "bfdlink.h"
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#include "libaout.h" /* BFD a.out internal data structures */
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#include "os9k.h"
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/* Swaps the information in an executable header taken from a raw byte
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stream memory image, into the internal exec_header structure. */
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static bfd_boolean
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os9k_swap_exec_header_in (bfd *abfd,
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mh_com *raw_bytes,
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struct internal_exec *execp)
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{
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mh_com *bytes = (mh_com *) raw_bytes;
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unsigned int dload, dmemsize, dmemstart;
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/* Now fill in fields in the execp, from the bytes in the raw data. */
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execp->a_info = H_GET_16 (abfd, bytes->m_sync);
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execp->a_syms = 0;
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execp->a_entry = H_GET_32 (abfd, bytes->m_exec);
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execp->a_talign = 2;
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execp->a_dalign = 2;
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execp->a_balign = 2;
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dload = H_GET_32 (abfd, bytes->m_idata);
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execp->a_data = dload + 8;
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if (bfd_seek (abfd, (file_ptr) dload, SEEK_SET) != 0
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|| (bfd_bread (&dmemstart, (bfd_size_type) sizeof (dmemstart), abfd)
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!= sizeof (dmemstart))
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|| (bfd_bread (&dmemsize, (bfd_size_type) sizeof (dmemsize), abfd)
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!= sizeof (dmemsize)))
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return FALSE;
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execp->a_tload = 0;
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execp->a_dload = H_GET_32 (abfd, (unsigned char *) &dmemstart);
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execp->a_text = dload - execp->a_tload;
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execp->a_data = H_GET_32 (abfd, (unsigned char *) &dmemsize);
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execp->a_bss = H_GET_32 (abfd, bytes->m_data) - execp->a_data;
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execp->a_trsize = 0;
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execp->a_drsize = 0;
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return TRUE;
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}
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/* Finish up the opening of a b.out file for reading. Fill in all the
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fields that are not handled by common code. */
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static const bfd_target *
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os9k_callback (bfd *abfd)
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{
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struct internal_exec *execp = exec_hdr (abfd);
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unsigned long bss_start;
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/* Architecture and machine type. */
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bfd_set_arch_mach (abfd, bfd_arch_i386, 0);
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/* The positions of the string table and symbol table. */
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obj_str_filepos (abfd) = 0;
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obj_sym_filepos (abfd) = 0;
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/* The alignments of the sections. */
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obj_textsec (abfd)->alignment_power = execp->a_talign;
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obj_datasec (abfd)->alignment_power = execp->a_dalign;
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obj_bsssec (abfd)->alignment_power = execp->a_balign;
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/* The starting addresses of the sections. */
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obj_textsec (abfd)->vma = execp->a_tload;
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obj_datasec (abfd)->vma = execp->a_dload;
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/* And reload the sizes, since the aout module zaps them. */
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obj_textsec (abfd)->size = execp->a_text;
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bss_start = execp->a_dload + execp->a_data; /* BSS = end of data section. */
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obj_bsssec (abfd)->vma = align_power (bss_start, execp->a_balign);
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/* The file positions of the sections. */
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obj_textsec (abfd)->filepos = execp->a_entry;
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obj_datasec (abfd)->filepos = execp->a_dload;
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/* The file positions of the relocation info ***
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obj_textsec (abfd)->rel_filepos = N_TROFF(*execp);
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obj_datasec (abfd)->rel_filepos = N_DROFF(*execp); */
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adata (abfd).page_size = 1; /* Not applicable. */
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adata (abfd).segment_size = 1;/* Not applicable. */
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adata (abfd).exec_bytes_size = MHCOM_BYTES_SIZE;
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return abfd->xvec;
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}
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static const bfd_target *
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os9k_object_p (bfd *abfd)
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{
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struct internal_exec anexec;
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mh_com exec_bytes;
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if (bfd_bread (&exec_bytes, (bfd_size_type) MHCOM_BYTES_SIZE, abfd)
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!= MHCOM_BYTES_SIZE)
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{
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if (bfd_get_error () != bfd_error_system_call)
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bfd_set_error (bfd_error_wrong_format);
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return 0;
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}
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anexec.a_info = H_GET_16 (abfd, exec_bytes.m_sync);
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if (N_BADMAG (anexec))
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{
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bfd_set_error (bfd_error_wrong_format);
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return 0;
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}
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if (! os9k_swap_exec_header_in (abfd, &exec_bytes, &anexec))
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{
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if (bfd_get_error () != bfd_error_system_call)
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bfd_set_error (bfd_error_wrong_format);
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return NULL;
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}
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return aout_32_some_aout_object_p (abfd, &anexec, os9k_callback);
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}
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static int
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os9k_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED,
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struct bfd_link_info *info ATTRIBUTE_UNUSED)
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{
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return sizeof (struct internal_exec);
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}
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#define aout_32_close_and_cleanup aout_32_bfd_free_cached_info
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#define aout_32_find_line _bfd_nosymbols_find_line
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#define aout_32_get_symbol_version_string \
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_bfd_nosymbols_get_symbol_version_string
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#define aout_32_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
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#define aout_32_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
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#define aout_32_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
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#define aout_32_get_section_contents_in_window \
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_bfd_generic_get_section_contents_in_window
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#define os9k_bfd_get_relocated_section_contents \
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bfd_generic_get_relocated_section_contents
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#define os9k_bfd_relax_section bfd_generic_relax_section
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#define os9k_bfd_gc_sections bfd_generic_gc_sections
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#define os9k_bfd_lookup_section_flags bfd_generic_lookup_section_flags
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#define os9k_bfd_merge_sections bfd_generic_merge_sections
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#define os9k_bfd_is_group_section bfd_generic_is_group_section
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#define os9k_bfd_discard_group bfd_generic_discard_group
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#define os9k_section_already_linked \
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_bfd_generic_section_already_linked
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#define os9k_bfd_define_common_symbol bfd_generic_define_common_symbol
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#define os9k_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
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#define os9k_bfd_link_add_symbols _bfd_generic_link_add_symbols
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#define os9k_bfd_link_just_syms _bfd_generic_link_just_syms
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#define os9k_bfd_copy_link_hash_symbol_type \
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_bfd_generic_copy_link_hash_symbol_type
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#define os9k_bfd_final_link _bfd_generic_final_link
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#define os9k_bfd_link_split_section _bfd_generic_link_split_section
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const bfd_target i386_aout_os9k_vec =
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{
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"i386os9k", /* name */
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bfd_target_os9k_flavour,
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BFD_ENDIAN_LITTLE, /* data byte order is little */
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BFD_ENDIAN_LITTLE, /* hdr byte order is little */
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(HAS_RELOC | EXEC_P | WP_TEXT), /* object flags */
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(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD), /* section flags */
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0, /* symbol leading char */
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' ', /* ar_pad_char */
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16, /* ar_max_namelen */
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0, /* match priority. */
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bfd_getl64, bfd_getl_signed_64, bfd_putl64,
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bfd_getl32, bfd_getl_signed_32, bfd_putl32,
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bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
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bfd_getl64, bfd_getl_signed_64, bfd_putl64,
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bfd_getl32, bfd_getl_signed_32, bfd_putl32,
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bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
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{_bfd_dummy_target, os9k_object_p, /* bfd_check_format */
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bfd_generic_archive_p, _bfd_dummy_target},
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{bfd_false, bfd_false, /* bfd_set_format */
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_bfd_generic_mkarchive, bfd_false},
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{bfd_false, bfd_false, /* bfd_write_contents */
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_bfd_write_archive_contents, bfd_false},
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BFD_JUMP_TABLE_GENERIC (aout_32),
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BFD_JUMP_TABLE_COPY (_bfd_generic),
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BFD_JUMP_TABLE_CORE (_bfd_nocore),
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BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd),
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BFD_JUMP_TABLE_SYMBOLS (aout_32),
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BFD_JUMP_TABLE_RELOCS (aout_32),
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BFD_JUMP_TABLE_WRITE (aout_32),
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BFD_JUMP_TABLE_LINK (os9k),
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BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
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NULL,
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NULL,
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};
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