1/* BFD back-end for os9000 i386 binaries. 2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2001, 2002, 3 2004, 2005, 2006 Free Software Foundation, Inc. 4 Written by Cygnus Support. 5 6This file is part of BFD, the Binary File Descriptor library. 7 8This program is free software; you can redistribute it and/or modify 9it under the terms of the GNU General Public License as published by 10the Free Software Foundation; either version 2 of the License, or 11(at your option) any later version. 12 13This program is distributed in the hope that it will be useful, 14but WITHOUT ANY WARRANTY; without even the implied warranty of 15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16GNU General Public License for more details. 17 18You should have received a copy of the GNU General Public License 19along with this program; if not, write to the Free Software 20Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 21 22 23#include "bfd.h" 24#include "sysdep.h" 25#include "libbfd.h" 26#include "bfdlink.h" 27#include "libaout.h" /* BFD a.out internal data structures */ 28#include "os9k.h" 29 30/* Swaps the information in an executable header taken from a raw byte 31 stream memory image, into the internal exec_header structure. */ 32static bfd_boolean 33os9k_swap_exec_header_in (bfd *abfd, 34 mh_com *raw_bytes, 35 struct internal_exec *execp) 36{ 37 mh_com *bytes = (mh_com *) raw_bytes; 38 unsigned int dload, dmemsize, dmemstart; 39 40 /* Now fill in fields in the execp, from the bytes in the raw data. */ 41 execp->a_info = H_GET_16 (abfd, bytes->m_sync); 42 execp->a_syms = 0; 43 execp->a_entry = H_GET_32 (abfd, bytes->m_exec); 44 execp->a_talign = 2; 45 execp->a_dalign = 2; 46 execp->a_balign = 2; 47 48 dload = H_GET_32 (abfd, bytes->m_idata); 49 execp->a_data = dload + 8; 50 51 if (bfd_seek (abfd, (file_ptr) dload, SEEK_SET) != 0 52 || (bfd_bread (&dmemstart, (bfd_size_type) sizeof (dmemstart), abfd) 53 != sizeof (dmemstart)) 54 || (bfd_bread (&dmemsize, (bfd_size_type) sizeof (dmemsize), abfd) 55 != sizeof (dmemsize))) 56 return FALSE; 57 58 execp->a_tload = 0; 59 execp->a_dload = H_GET_32 (abfd, (unsigned char *) &dmemstart); 60 execp->a_text = dload - execp->a_tload; 61 execp->a_data = H_GET_32 (abfd, (unsigned char *) &dmemsize); 62 execp->a_bss = H_GET_32 (abfd, bytes->m_data) - execp->a_data; 63 64 execp->a_trsize = 0; 65 execp->a_drsize = 0; 66 67 return TRUE; 68} 69 70 71/* Finish up the opening of a b.out file for reading. Fill in all the 72 fields that are not handled by common code. */ 73 74static const bfd_target * 75os9k_callback (bfd *abfd) 76{ 77 struct internal_exec *execp = exec_hdr (abfd); 78 unsigned long bss_start; 79 80 /* Architecture and machine type. */ 81 bfd_set_arch_mach (abfd, bfd_arch_i386, 0); 82 83 /* The positions of the string table and symbol table. */ 84 obj_str_filepos (abfd) = 0; 85 obj_sym_filepos (abfd) = 0; 86 87 /* The alignments of the sections. */ 88 obj_textsec (abfd)->alignment_power = execp->a_talign; 89 obj_datasec (abfd)->alignment_power = execp->a_dalign; 90 obj_bsssec (abfd)->alignment_power = execp->a_balign; 91 92 /* The starting addresses of the sections. */ 93 obj_textsec (abfd)->vma = execp->a_tload; 94 obj_datasec (abfd)->vma = execp->a_dload; 95 96 /* And reload the sizes, since the aout module zaps them. */ 97 obj_textsec (abfd)->size = execp->a_text; 98 99 bss_start = execp->a_dload + execp->a_data; /* BSS = end of data section. */ 100 obj_bsssec (abfd)->vma = align_power (bss_start, execp->a_balign); 101 102 /* The file positions of the sections. */ 103 obj_textsec (abfd)->filepos = execp->a_entry; 104 obj_datasec (abfd)->filepos = execp->a_dload; 105 106 /* The file positions of the relocation info *** 107 obj_textsec (abfd)->rel_filepos = N_TROFF(*execp); 108 obj_datasec (abfd)->rel_filepos = N_DROFF(*execp); */ 109 110 adata (abfd).page_size = 1; /* Not applicable. */ 111 adata (abfd).segment_size = 1;/* Not applicable. */ 112 adata (abfd).exec_bytes_size = MHCOM_BYTES_SIZE; 113 114 return abfd->xvec; 115} 116 117static const bfd_target * 118os9k_object_p (bfd *abfd) 119{ 120 struct internal_exec anexec; 121 mh_com exec_bytes; 122 123 if (bfd_bread ((PTR) &exec_bytes, (bfd_size_type) MHCOM_BYTES_SIZE, abfd) 124 != MHCOM_BYTES_SIZE) 125 { 126 if (bfd_get_error () != bfd_error_system_call) 127 bfd_set_error (bfd_error_wrong_format); 128 return 0; 129 } 130 131 anexec.a_info = H_GET_16 (abfd, exec_bytes.m_sync); 132 if (N_BADMAG (anexec)) 133 { 134 bfd_set_error (bfd_error_wrong_format); 135 return 0; 136 } 137 138 if (! os9k_swap_exec_header_in (abfd, &exec_bytes, &anexec)) 139 { 140 if (bfd_get_error () != bfd_error_system_call) 141 bfd_set_error (bfd_error_wrong_format); 142 return NULL; 143 } 144 return aout_32_some_aout_object_p (abfd, &anexec, os9k_callback); 145} 146 147static int 148os9k_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED, 149 struct bfd_link_info *info ATTRIBUTE_UNUSED) 150{ 151 return sizeof (struct internal_exec); 152} 153 154 155 156#define aout_32_close_and_cleanup aout_32_bfd_free_cached_info 157 158#define aout_32_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol 159 160#define aout_32_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup 161 162#define aout_32_get_section_contents_in_window \ 163 _bfd_generic_get_section_contents_in_window 164 165#define os9k_bfd_get_relocated_section_contents \ 166 bfd_generic_get_relocated_section_contents 167#define os9k_bfd_relax_section bfd_generic_relax_section 168#define os9k_bfd_gc_sections bfd_generic_gc_sections 169#define os9k_bfd_merge_sections bfd_generic_merge_sections 170#define os9k_bfd_is_group_section bfd_generic_is_group_section 171#define os9k_bfd_discard_group bfd_generic_discard_group 172#define os9k_section_already_linked \ 173 _bfd_generic_section_already_linked 174#define os9k_bfd_link_hash_table_create _bfd_generic_link_hash_table_create 175#define os9k_bfd_link_hash_table_free _bfd_generic_link_hash_table_free 176#define os9k_bfd_link_add_symbols _bfd_generic_link_add_symbols 177#define os9k_bfd_link_just_syms _bfd_generic_link_just_syms 178#define os9k_bfd_final_link _bfd_generic_final_link 179#define os9k_bfd_link_split_section _bfd_generic_link_split_section 180 181const bfd_target i386os9k_vec = 182 { 183 "i386os9k", /* name */ 184 bfd_target_os9k_flavour, 185 BFD_ENDIAN_LITTLE, /* data byte order is little */ 186 BFD_ENDIAN_LITTLE, /* hdr byte order is little */ 187 (HAS_RELOC | EXEC_P | WP_TEXT), /* object flags */ 188 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD), /* section flags */ 189 0, /* symbol leading char */ 190 ' ', /* ar_pad_char */ 191 16, /* ar_max_namelen */ 192 193 bfd_getl64, bfd_getl_signed_64, bfd_putl64, 194 bfd_getl32, bfd_getl_signed_32, bfd_putl32, 195 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ 196 bfd_getl64, bfd_getl_signed_64, bfd_putl64, 197 bfd_getl32, bfd_getl_signed_32, bfd_putl32, 198 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ 199 {_bfd_dummy_target, os9k_object_p, /* bfd_check_format */ 200 bfd_generic_archive_p, _bfd_dummy_target}, 201 {bfd_false, bfd_false, /* bfd_set_format */ 202 _bfd_generic_mkarchive, bfd_false}, 203 {bfd_false, bfd_false, /* bfd_write_contents */ 204 _bfd_write_archive_contents, bfd_false}, 205 206 BFD_JUMP_TABLE_GENERIC (aout_32), 207 BFD_JUMP_TABLE_COPY (_bfd_generic), 208 BFD_JUMP_TABLE_CORE (_bfd_nocore), 209 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd), 210 BFD_JUMP_TABLE_SYMBOLS (aout_32), 211 BFD_JUMP_TABLE_RELOCS (aout_32), 212 BFD_JUMP_TABLE_WRITE (aout_32), 213 BFD_JUMP_TABLE_LINK (os9k), 214 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), 215 216 NULL, 217 218 (PTR) 0, 219 }; 220