1 /* BFD back-end for os9000 i386 binaries. 2 Copyright (C) 1990-2014 Free Software Foundation, Inc. 3 Written by Cygnus Support. 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 20 MA 02110-1301, USA. */ 21 22 #include "sysdep.h" 23 #include "bfd.h" 24 #include "libbfd.h" 25 #include "bfdlink.h" 26 #include "libaout.h" /* BFD a.out internal data structures */ 27 #include "os9k.h" 28 29 /* Swaps the information in an executable header taken from a raw byte 30 stream memory image, into the internal exec_header structure. */ 31 static bfd_boolean 32 os9k_swap_exec_header_in (bfd *abfd, 33 mh_com *raw_bytes, 34 struct internal_exec *execp) 35 { 36 mh_com *bytes = (mh_com *) raw_bytes; 37 unsigned int dload, dmemsize, dmemstart; 38 39 /* Now fill in fields in the execp, from the bytes in the raw data. */ 40 execp->a_info = H_GET_16 (abfd, bytes->m_sync); 41 execp->a_syms = 0; 42 execp->a_entry = H_GET_32 (abfd, bytes->m_exec); 43 execp->a_talign = 2; 44 execp->a_dalign = 2; 45 execp->a_balign = 2; 46 47 dload = H_GET_32 (abfd, bytes->m_idata); 48 execp->a_data = dload + 8; 49 50 if (bfd_seek (abfd, (file_ptr) dload, SEEK_SET) != 0 51 || (bfd_bread (&dmemstart, (bfd_size_type) sizeof (dmemstart), abfd) 52 != sizeof (dmemstart)) 53 || (bfd_bread (&dmemsize, (bfd_size_type) sizeof (dmemsize), abfd) 54 != sizeof (dmemsize))) 55 return FALSE; 56 57 execp->a_tload = 0; 58 execp->a_dload = H_GET_32 (abfd, (unsigned char *) &dmemstart); 59 execp->a_text = dload - execp->a_tload; 60 execp->a_data = H_GET_32 (abfd, (unsigned char *) &dmemsize); 61 execp->a_bss = H_GET_32 (abfd, bytes->m_data) - execp->a_data; 62 63 execp->a_trsize = 0; 64 execp->a_drsize = 0; 65 66 return TRUE; 67 } 68 69 70 /* Finish up the opening of a b.out file for reading. Fill in all the 71 fields that are not handled by common code. */ 72 73 static const bfd_target * 74 os9k_callback (bfd *abfd) 75 { 76 struct internal_exec *execp = exec_hdr (abfd); 77 unsigned long bss_start; 78 79 /* Architecture and machine type. */ 80 bfd_set_arch_mach (abfd, bfd_arch_i386, 0); 81 82 /* The positions of the string table and symbol table. */ 83 obj_str_filepos (abfd) = 0; 84 obj_sym_filepos (abfd) = 0; 85 86 /* The alignments of the sections. */ 87 obj_textsec (abfd)->alignment_power = execp->a_talign; 88 obj_datasec (abfd)->alignment_power = execp->a_dalign; 89 obj_bsssec (abfd)->alignment_power = execp->a_balign; 90 91 /* The starting addresses of the sections. */ 92 obj_textsec (abfd)->vma = execp->a_tload; 93 obj_datasec (abfd)->vma = execp->a_dload; 94 95 /* And reload the sizes, since the aout module zaps them. */ 96 obj_textsec (abfd)->size = execp->a_text; 97 98 bss_start = execp->a_dload + execp->a_data; /* BSS = end of data section. */ 99 obj_bsssec (abfd)->vma = align_power (bss_start, execp->a_balign); 100 101 /* The file positions of the sections. */ 102 obj_textsec (abfd)->filepos = execp->a_entry; 103 obj_datasec (abfd)->filepos = execp->a_dload; 104 105 /* The file positions of the relocation info *** 106 obj_textsec (abfd)->rel_filepos = N_TROFF(*execp); 107 obj_datasec (abfd)->rel_filepos = N_DROFF(*execp); */ 108 109 adata (abfd).page_size = 1; /* Not applicable. */ 110 adata (abfd).segment_size = 1;/* Not applicable. */ 111 adata (abfd).exec_bytes_size = MHCOM_BYTES_SIZE; 112 113 return abfd->xvec; 114 } 115 116 static const bfd_target * 117 os9k_object_p (bfd *abfd) 118 { 119 struct internal_exec anexec; 120 mh_com exec_bytes; 121 122 if (bfd_bread (&exec_bytes, (bfd_size_type) MHCOM_BYTES_SIZE, abfd) 123 != MHCOM_BYTES_SIZE) 124 { 125 if (bfd_get_error () != bfd_error_system_call) 126 bfd_set_error (bfd_error_wrong_format); 127 return 0; 128 } 129 130 anexec.a_info = H_GET_16 (abfd, exec_bytes.m_sync); 131 if (N_BADMAG (anexec)) 132 { 133 bfd_set_error (bfd_error_wrong_format); 134 return 0; 135 } 136 137 if (! os9k_swap_exec_header_in (abfd, &exec_bytes, &anexec)) 138 { 139 if (bfd_get_error () != bfd_error_system_call) 140 bfd_set_error (bfd_error_wrong_format); 141 return NULL; 142 } 143 return aout_32_some_aout_object_p (abfd, &anexec, os9k_callback); 144 } 145 146 static int 147 os9k_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED, 148 struct bfd_link_info *info ATTRIBUTE_UNUSED) 149 { 150 return sizeof (struct internal_exec); 151 } 152 153 154 156 #define aout_32_close_and_cleanup aout_32_bfd_free_cached_info 157 158 #define aout_32_find_line _bfd_nosymbols_find_line 159 #define aout_32_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol 160 161 #define aout_32_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup 162 #define aout_32_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup 163 164 #define aout_32_get_section_contents_in_window \ 165 _bfd_generic_get_section_contents_in_window 166 167 #define os9k_bfd_get_relocated_section_contents \ 168 bfd_generic_get_relocated_section_contents 169 #define os9k_bfd_relax_section bfd_generic_relax_section 170 #define os9k_bfd_gc_sections bfd_generic_gc_sections 171 #define os9k_bfd_lookup_section_flags bfd_generic_lookup_section_flags 172 #define os9k_bfd_merge_sections bfd_generic_merge_sections 173 #define os9k_bfd_is_group_section bfd_generic_is_group_section 174 #define os9k_bfd_discard_group bfd_generic_discard_group 175 #define os9k_section_already_linked \ 176 _bfd_generic_section_already_linked 177 #define os9k_bfd_define_common_symbol bfd_generic_define_common_symbol 178 #define os9k_bfd_link_hash_table_create _bfd_generic_link_hash_table_create 179 #define os9k_bfd_link_add_symbols _bfd_generic_link_add_symbols 180 #define os9k_bfd_link_just_syms _bfd_generic_link_just_syms 181 #define os9k_bfd_copy_link_hash_symbol_type \ 182 _bfd_generic_copy_link_hash_symbol_type 183 #define os9k_bfd_final_link _bfd_generic_final_link 184 #define os9k_bfd_link_split_section _bfd_generic_link_split_section 185 186 const bfd_target i386_aout_os9k_vec = 187 { 188 "i386os9k", /* name */ 189 bfd_target_os9k_flavour, 190 BFD_ENDIAN_LITTLE, /* data byte order is little */ 191 BFD_ENDIAN_LITTLE, /* hdr byte order is little */ 192 (HAS_RELOC | EXEC_P | WP_TEXT), /* object flags */ 193 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD), /* section flags */ 194 0, /* symbol leading char */ 195 ' ', /* ar_pad_char */ 196 16, /* ar_max_namelen */ 197 0, /* match priority. */ 198 199 bfd_getl64, bfd_getl_signed_64, bfd_putl64, 200 bfd_getl32, bfd_getl_signed_32, bfd_putl32, 201 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ 202 bfd_getl64, bfd_getl_signed_64, bfd_putl64, 203 bfd_getl32, bfd_getl_signed_32, bfd_putl32, 204 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ 205 {_bfd_dummy_target, os9k_object_p, /* bfd_check_format */ 206 bfd_generic_archive_p, _bfd_dummy_target}, 207 {bfd_false, bfd_false, /* bfd_set_format */ 208 _bfd_generic_mkarchive, bfd_false}, 209 {bfd_false, bfd_false, /* bfd_write_contents */ 210 _bfd_write_archive_contents, bfd_false}, 211 212 BFD_JUMP_TABLE_GENERIC (aout_32), 213 BFD_JUMP_TABLE_COPY (_bfd_generic), 214 BFD_JUMP_TABLE_CORE (_bfd_nocore), 215 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd), 216 BFD_JUMP_TABLE_SYMBOLS (aout_32), 217 BFD_JUMP_TABLE_RELOCS (aout_32), 218 BFD_JUMP_TABLE_WRITE (aout_32), 219 BFD_JUMP_TABLE_LINK (os9k), 220 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), 221 222 NULL, 223 224 NULL, 225 }; 226
