| 1 | /* BFD back-end for os9000 i386 binaries. |
| 2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2001, 2002, |
| 3 | 2004, 2005 Free Software Foundation, Inc. |
| 4 | Written by Cygnus Support. |
| 5 | |
| 6 | This file is part of BFD, the Binary File Descriptor library. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, 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 | static const bfd_target * os9k_callback |
| 31 | PARAMS ((bfd *)); |
| 32 | static const bfd_target * os9k_object_p |
| 33 | PARAMS ((bfd *)); |
| 34 | static int os9k_sizeof_headers |
| 35 | PARAMS ((bfd *, bfd_boolean)); |
| 36 | bfd_boolean os9k_swap_exec_header_in |
| 37 | PARAMS ((bfd *, mh_com *, struct internal_exec *)); |
| 38 | |
| 39 | /* Swaps the information in an executable header taken from a raw byte |
| 40 | stream memory image, into the internal exec_header structure. */ |
| 41 | bfd_boolean |
| 42 | os9k_swap_exec_header_in (abfd, raw_bytes, execp) |
| 43 | bfd *abfd; |
| 44 | mh_com *raw_bytes; |
| 45 | struct internal_exec *execp; |
| 46 | { |
| 47 | mh_com *bytes = (mh_com *) raw_bytes; |
| 48 | unsigned int dload, dmemsize, dmemstart; |
| 49 | |
| 50 | /* Now fill in fields in the execp, from the bytes in the raw data. */ |
| 51 | execp->a_info = H_GET_16 (abfd, bytes->m_sync); |
| 52 | execp->a_syms = 0; |
| 53 | execp->a_entry = H_GET_32 (abfd, bytes->m_exec); |
| 54 | execp->a_talign = 2; |
| 55 | execp->a_dalign = 2; |
| 56 | execp->a_balign = 2; |
| 57 | |
| 58 | dload = H_GET_32 (abfd, bytes->m_idata); |
| 59 | execp->a_data = dload + 8; |
| 60 | |
| 61 | if (bfd_seek (abfd, (file_ptr) dload, SEEK_SET) != 0 |
| 62 | || (bfd_bread (&dmemstart, (bfd_size_type) sizeof (dmemstart), abfd) |
| 63 | != sizeof (dmemstart)) |
| 64 | || (bfd_bread (&dmemsize, (bfd_size_type) sizeof (dmemsize), abfd) |
| 65 | != sizeof (dmemsize))) |
| 66 | return FALSE; |
| 67 | |
| 68 | execp->a_tload = 0; |
| 69 | execp->a_dload = H_GET_32 (abfd, (unsigned char *) &dmemstart); |
| 70 | execp->a_text = dload - execp->a_tload; |
| 71 | execp->a_data = H_GET_32 (abfd, (unsigned char *) &dmemsize); |
| 72 | execp->a_bss = H_GET_32 (abfd, bytes->m_data) - execp->a_data; |
| 73 | |
| 74 | execp->a_trsize = 0; |
| 75 | execp->a_drsize = 0; |
| 76 | |
| 77 | return TRUE; |
| 78 | } |
| 79 | |
| 80 | static const bfd_target * |
| 81 | os9k_object_p (abfd) |
| 82 | bfd *abfd; |
| 83 | { |
| 84 | struct internal_exec anexec; |
| 85 | mh_com exec_bytes; |
| 86 | |
| 87 | if (bfd_bread ((PTR) &exec_bytes, (bfd_size_type) MHCOM_BYTES_SIZE, abfd) |
| 88 | != MHCOM_BYTES_SIZE) |
| 89 | { |
| 90 | if (bfd_get_error () != bfd_error_system_call) |
| 91 | bfd_set_error (bfd_error_wrong_format); |
| 92 | return 0; |
| 93 | } |
| 94 | |
| 95 | anexec.a_info = H_GET_16 (abfd, exec_bytes.m_sync); |
| 96 | if (N_BADMAG (anexec)) |
| 97 | { |
| 98 | bfd_set_error (bfd_error_wrong_format); |
| 99 | return 0; |
| 100 | } |
| 101 | |
| 102 | if (! os9k_swap_exec_header_in (abfd, &exec_bytes, &anexec)) |
| 103 | { |
| 104 | if (bfd_get_error () != bfd_error_system_call) |
| 105 | bfd_set_error (bfd_error_wrong_format); |
| 106 | return NULL; |
| 107 | } |
| 108 | return aout_32_some_aout_object_p (abfd, &anexec, os9k_callback); |
| 109 | } |
| 110 | |
| 111 | |
| 112 | /* Finish up the opening of a b.out file for reading. Fill in all the |
| 113 | fields that are not handled by common code. */ |
| 114 | |
| 115 | static const bfd_target * |
| 116 | os9k_callback (abfd) |
| 117 | bfd *abfd; |
| 118 | { |
| 119 | struct internal_exec *execp = exec_hdr (abfd); |
| 120 | unsigned long bss_start; |
| 121 | |
| 122 | /* Architecture and machine type. */ |
| 123 | bfd_set_arch_mach (abfd, bfd_arch_i386, 0); |
| 124 | |
| 125 | /* The positions of the string table and symbol table. */ |
| 126 | obj_str_filepos (abfd) = 0; |
| 127 | obj_sym_filepos (abfd) = 0; |
| 128 | |
| 129 | /* The alignments of the sections. */ |
| 130 | obj_textsec (abfd)->alignment_power = execp->a_talign; |
| 131 | obj_datasec (abfd)->alignment_power = execp->a_dalign; |
| 132 | obj_bsssec (abfd)->alignment_power = execp->a_balign; |
| 133 | |
| 134 | /* The starting addresses of the sections. */ |
| 135 | obj_textsec (abfd)->vma = execp->a_tload; |
| 136 | obj_datasec (abfd)->vma = execp->a_dload; |
| 137 | |
| 138 | /* And reload the sizes, since the aout module zaps them. */ |
| 139 | obj_textsec (abfd)->size = execp->a_text; |
| 140 | |
| 141 | bss_start = execp->a_dload + execp->a_data; /* BSS = end of data section. */ |
| 142 | obj_bsssec (abfd)->vma = align_power (bss_start, execp->a_balign); |
| 143 | |
| 144 | /* The file positions of the sections. */ |
| 145 | obj_textsec (abfd)->filepos = execp->a_entry; |
| 146 | obj_datasec (abfd)->filepos = execp->a_dload; |
| 147 | |
| 148 | /* The file positions of the relocation info *** |
| 149 | obj_textsec (abfd)->rel_filepos = N_TROFF(*execp); |
| 150 | obj_datasec (abfd)->rel_filepos = N_DROFF(*execp); */ |
| 151 | |
| 152 | adata (abfd).page_size = 1; /* Not applicable. */ |
| 153 | adata (abfd).segment_size = 1;/* Not applicable. */ |
| 154 | adata (abfd).exec_bytes_size = MHCOM_BYTES_SIZE; |
| 155 | |
| 156 | return abfd->xvec; |
| 157 | } |
| 158 | |
| 159 | static int |
| 160 | os9k_sizeof_headers (ignore_abfd, ignore) |
| 161 | bfd *ignore_abfd ATTRIBUTE_UNUSED; |
| 162 | bfd_boolean ignore ATTRIBUTE_UNUSED; |
| 163 | { |
| 164 | return sizeof (struct internal_exec); |
| 165 | } |
| 166 | |
| 167 | \f |
| 168 | |
| 169 | #define aout_32_close_and_cleanup aout_32_bfd_free_cached_info |
| 170 | |
| 171 | #define aout_32_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol |
| 172 | |
| 173 | #define aout_32_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup |
| 174 | |
| 175 | #define aout_32_get_section_contents_in_window \ |
| 176 | _bfd_generic_get_section_contents_in_window |
| 177 | |
| 178 | #define os9k_bfd_get_relocated_section_contents \ |
| 179 | bfd_generic_get_relocated_section_contents |
| 180 | #define os9k_bfd_relax_section bfd_generic_relax_section |
| 181 | #define os9k_bfd_gc_sections bfd_generic_gc_sections |
| 182 | #define os9k_bfd_merge_sections bfd_generic_merge_sections |
| 183 | #define os9k_bfd_is_group_section bfd_generic_is_group_section |
| 184 | #define os9k_bfd_discard_group bfd_generic_discard_group |
| 185 | #define os9k_section_already_linked \ |
| 186 | _bfd_generic_section_already_linked |
| 187 | #define os9k_bfd_link_hash_table_create _bfd_generic_link_hash_table_create |
| 188 | #define os9k_bfd_link_hash_table_free _bfd_generic_link_hash_table_free |
| 189 | #define os9k_bfd_link_add_symbols _bfd_generic_link_add_symbols |
| 190 | #define os9k_bfd_link_just_syms _bfd_generic_link_just_syms |
| 191 | #define os9k_bfd_final_link _bfd_generic_final_link |
| 192 | #define os9k_bfd_link_split_section _bfd_generic_link_split_section |
| 193 | |
| 194 | const bfd_target i386os9k_vec = |
| 195 | { |
| 196 | "i386os9k", /* name */ |
| 197 | bfd_target_os9k_flavour, |
| 198 | BFD_ENDIAN_LITTLE, /* data byte order is little */ |
| 199 | BFD_ENDIAN_LITTLE, /* hdr byte order is little */ |
| 200 | (HAS_RELOC | EXEC_P | WP_TEXT), /* object flags */ |
| 201 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD), /* section flags */ |
| 202 | 0, /* symbol leading char */ |
| 203 | ' ', /* ar_pad_char */ |
| 204 | 16, /* ar_max_namelen */ |
| 205 | |
| 206 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| 207 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| 208 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ |
| 209 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| 210 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| 211 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ |
| 212 | {_bfd_dummy_target, os9k_object_p, /* bfd_check_format */ |
| 213 | bfd_generic_archive_p, _bfd_dummy_target}, |
| 214 | {bfd_false, bfd_false, /* bfd_set_format */ |
| 215 | _bfd_generic_mkarchive, bfd_false}, |
| 216 | {bfd_false, bfd_false, /* bfd_write_contents */ |
| 217 | _bfd_write_archive_contents, bfd_false}, |
| 218 | |
| 219 | BFD_JUMP_TABLE_GENERIC (aout_32), |
| 220 | BFD_JUMP_TABLE_COPY (_bfd_generic), |
| 221 | BFD_JUMP_TABLE_CORE (_bfd_nocore), |
| 222 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd), |
| 223 | BFD_JUMP_TABLE_SYMBOLS (aout_32), |
| 224 | BFD_JUMP_TABLE_RELOCS (aout_32), |
| 225 | BFD_JUMP_TABLE_WRITE (aout_32), |
| 226 | BFD_JUMP_TABLE_LINK (os9k), |
| 227 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), |
| 228 | |
| 229 | NULL, |
| 230 | |
| 231 | (PTR) 0, |
| 232 | }; |