1 /* BFD back-end for os9000 i386 binaries. 2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1998, 1999 3 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 PARAMS ((bfd *)); 31 32 /* Swaps the information in an executable header taken from a raw byte 33 stream memory image, into the internal exec_header structure. */ 34 boolean 35 os9k_swap_exec_header_in (abfd, raw_bytes, execp) 36 bfd *abfd; 37 mh_com *raw_bytes; 38 struct internal_exec *execp; 39 { 40 mh_com *bytes = (mh_com *) raw_bytes; 41 unsigned int dload, dmemsize, dmemstart; 42 43 /* Now fill in fields in the execp, from the bytes in the raw data. */ 44 execp->a_info = bfd_h_get_16 (abfd, bytes->m_sync); 45 execp->a_syms = 0; 46 execp->a_entry = bfd_h_get_32 (abfd, bytes->m_exec); 47 execp->a_talign = 2; 48 execp->a_dalign = 2; 49 execp->a_balign = 2; 50 51 dload = bfd_h_get_32 (abfd, bytes->m_idata); 52 execp->a_data = dload + 8; 53 54 if (bfd_seek (abfd, (file_ptr) dload, SEEK_SET) != 0 55 || (bfd_read (&dmemstart, sizeof (dmemstart), 1, abfd) 56 != sizeof (dmemstart)) 57 || (bfd_read (&dmemsize, sizeof (dmemsize), 1, abfd) 58 != sizeof (dmemsize))) 59 return false; 60 61 execp->a_tload = 0; 62 execp->a_dload = bfd_h_get_32 (abfd, (unsigned char *) &dmemstart); 63 execp->a_text = dload - execp->a_tload; 64 execp->a_data = bfd_h_get_32 (abfd, (unsigned char *) &dmemsize); 65 execp->a_bss = bfd_h_get_32 (abfd, bytes->m_data) - execp->a_data; 66 67 execp->a_trsize = 0; 68 execp->a_drsize = 0; 69 70 return true; 71 } 72 73 #if 0 74 /* Swaps the information in an internal exec header structure into the 75 supplied buffer ready for writing to disk. */ 76 77 PROTO (void, os9k_swap_exec_header_out, 78 (bfd * abfd, 79 struct internal_exec * execp, 80 struct mh_com * raw_bytes)); 81 void 82 os9k_swap_exec_header_out (abfd, execp, raw_bytes) 83 bfd *abfd; 84 struct internal_exec *execp; 85 mh_com *raw_bytes; 86 { 87 mh_com *bytes = (mh_com *) raw_bytes; 88 89 /* Now fill in fields in the raw data, from the fields in the exec struct. */ 90 bfd_h_put_32 (abfd, execp->a_info, bytes->e_info); 91 bfd_h_put_32 (abfd, execp->a_text, bytes->e_text); 92 bfd_h_put_32 (abfd, execp->a_data, bytes->e_data); 93 bfd_h_put_32 (abfd, execp->a_bss, bytes->e_bss); 94 bfd_h_put_32 (abfd, execp->a_syms, bytes->e_syms); 95 bfd_h_put_32 (abfd, execp->a_entry, bytes->e_entry); 96 bfd_h_put_32 (abfd, execp->a_trsize, bytes->e_trsize); 97 bfd_h_put_32 (abfd, execp->a_drsize, bytes->e_drsize); 98 bfd_h_put_32 (abfd, execp->a_tload, bytes->e_tload); 99 bfd_h_put_32 (abfd, execp->a_dload, bytes->e_dload); 100 bytes->e_talign[0] = execp->a_talign; 101 bytes->e_dalign[0] = execp->a_dalign; 102 bytes->e_balign[0] = execp->a_balign; 103 bytes->e_relaxable[0] = execp->a_relaxable; 104 } 105 106 #endif /* 0 */ 107 108 static const bfd_target * 109 os9k_object_p (abfd) 110 bfd *abfd; 111 { 112 struct internal_exec anexec; 113 mh_com exec_bytes; 114 115 if (bfd_read ((PTR) & exec_bytes, MHCOM_BYTES_SIZE, 1, abfd) 116 != MHCOM_BYTES_SIZE) 117 { 118 if (bfd_get_error () != bfd_error_system_call) 119 bfd_set_error (bfd_error_wrong_format); 120 return 0; 121 } 122 123 anexec.a_info = bfd_h_get_16 (abfd, exec_bytes.m_sync); 124 if (N_BADMAG (anexec)) 125 { 126 bfd_set_error (bfd_error_wrong_format); 127 return 0; 128 } 129 130 if (! os9k_swap_exec_header_in (abfd, &exec_bytes, &anexec)) 131 { 132 if (bfd_get_error () != bfd_error_system_call) 133 bfd_set_error (bfd_error_wrong_format); 134 return NULL; 135 } 136 return aout_32_some_aout_object_p (abfd, &anexec, os9k_callback); 137 } 138 139 140 /* Finish up the opening of a b.out file for reading. Fill in all the 141 fields that are not handled by common code. */ 142 143 static const bfd_target * 144 os9k_callback (abfd) 145 bfd *abfd; 146 { 147 struct internal_exec *execp = exec_hdr (abfd); 148 unsigned long bss_start; 149 150 /* Architecture and machine type */ 151 bfd_set_arch_mach (abfd, bfd_arch_i386, 0); 152 153 /* The positions of the string table and symbol table. */ 154 obj_str_filepos (abfd) = 0; 155 obj_sym_filepos (abfd) = 0; 156 157 /* The alignments of the sections */ 158 obj_textsec (abfd)->alignment_power = execp->a_talign; 159 obj_datasec (abfd)->alignment_power = execp->a_dalign; 160 obj_bsssec (abfd)->alignment_power = execp->a_balign; 161 162 /* The starting addresses of the sections. */ 163 obj_textsec (abfd)->vma = execp->a_tload; 164 obj_datasec (abfd)->vma = execp->a_dload; 165 166 /* And reload the sizes, since the aout module zaps them */ 167 obj_textsec (abfd)->_raw_size = execp->a_text; 168 169 bss_start = execp->a_dload + execp->a_data; /* BSS = end of data section */ 170 obj_bsssec (abfd)->vma = align_power (bss_start, execp->a_balign); 171 172 /* The file positions of the sections */ 173 obj_textsec (abfd)->filepos = execp->a_entry; 174 obj_datasec (abfd)->filepos = execp->a_dload; 175 176 /* The file positions of the relocation info *** 177 obj_textsec (abfd)->rel_filepos = N_TROFF(*execp); 178 obj_datasec (abfd)->rel_filepos = N_DROFF(*execp); 179 */ 180 181 adata (abfd).page_size = 1; /* Not applicable. */ 182 adata (abfd).segment_size = 1;/* Not applicable. */ 183 adata (abfd).exec_bytes_size = MHCOM_BYTES_SIZE; 184 185 return abfd->xvec; 186 } 187 188 #if 0 189 struct bout_data_struct 190 { 191 struct aoutdata a; 192 struct internal_exec e; 193 }; 194 195 static boolean 196 os9k_mkobject (abfd) 197 bfd *abfd; 198 { 199 struct bout_data_struct *rawptr; 200 201 rawptr = (struct bout_data_struct *) bfd_zalloc (abfd, sizeof (struct bout_data_struct)); 202 if (rawptr == NULL) 203 return false; 204 205 abfd->tdata.bout_data = rawptr; 206 exec_hdr (abfd) = &rawptr->e; 207 208 obj_textsec (abfd) = (asection *) NULL; 209 obj_datasec (abfd) = (asection *) NULL; 210 obj_bsssec (abfd) = (asection *) NULL; 211 212 return true; 213 } 214 215 static boolean 216 os9k_write_object_contents (abfd) 217 bfd *abfd; 218 { 219 struct external_exec swapped_hdr; 220 221 if (! aout_32_make_sections (abfd)) 222 return false; 223 224 exec_hdr (abfd)->a_info = BMAGIC; 225 226 exec_hdr (abfd)->a_text = obj_textsec (abfd)->_raw_size; 227 exec_hdr (abfd)->a_data = obj_datasec (abfd)->_raw_size; 228 exec_hdr (abfd)->a_bss = obj_bsssec (abfd)->_raw_size; 229 exec_hdr (abfd)->a_syms = bfd_get_symcount (abfd) * sizeof (struct nlist); 230 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd); 231 exec_hdr (abfd)->a_trsize = ((obj_textsec (abfd)->reloc_count) * 232 sizeof (struct relocation_info)); 233 exec_hdr (abfd)->a_drsize = ((obj_datasec (abfd)->reloc_count) * 234 sizeof (struct relocation_info)); 235 236 exec_hdr (abfd)->a_talign = obj_textsec (abfd)->alignment_power; 237 exec_hdr (abfd)->a_dalign = obj_datasec (abfd)->alignment_power; 238 exec_hdr (abfd)->a_balign = obj_bsssec (abfd)->alignment_power; 239 240 exec_hdr (abfd)->a_tload = obj_textsec (abfd)->vma; 241 exec_hdr (abfd)->a_dload = obj_datasec (abfd)->vma; 242 243 bout_swap_exec_header_out (abfd, exec_hdr (abfd), &swapped_hdr); 244 245 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 246 || (bfd_write ((PTR) & swapped_hdr, 1, EXEC_BYTES_SIZE, abfd) 247 != EXEC_BYTES_SIZE)) 248 return false; 249 250 /* Now write out reloc info, followed by syms and strings */ 251 if (bfd_get_symcount (abfd) != 0) 252 { 253 if (bfd_seek (abfd, (file_ptr) (N_SYMOFF (*exec_hdr (abfd))), SEEK_SET) 254 != 0) 255 return false; 256 257 if (!aout_32_write_syms (abfd)) 258 return false; 259 260 if (bfd_seek (abfd, (file_ptr) (N_TROFF (*exec_hdr (abfd))), SEEK_SET) 261 != 0) 262 return false; 263 264 if (!b_out_squirt_out_relocs (abfd, obj_textsec (abfd))) 265 return false; 266 if (bfd_seek (abfd, (file_ptr) (N_DROFF (*exec_hdr (abfd))), SEEK_SET) 267 != 0) 268 return false; 269 270 if (!b_out_squirt_out_relocs (abfd, obj_datasec (abfd))) 271 return false; 272 } 273 return true; 274 } 275 276 static boolean 277 os9k_set_section_contents (abfd, section, location, offset, count) 278 bfd *abfd; 279 sec_ptr section; 280 unsigned char *location; 281 file_ptr offset; 282 int count; 283 { 284 285 if (abfd->output_has_begun == false) 286 { /* set by bfd.c handler */ 287 if (! aout_32_make_sections (abfd)) 288 return false; 289 290 obj_textsec (abfd)->filepos = sizeof (struct internal_exec); 291 obj_datasec (abfd)->filepos = obj_textsec (abfd)->filepos 292 + obj_textsec (abfd)->_raw_size; 293 294 } 295 /* regardless, once we know what we're doing, we might as well get going */ 296 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0) 297 return false; 298 299 if (count != 0) 300 { 301 return (bfd_write ((PTR) location, 1, count, abfd) == count) ? true : false; 302 } 303 return true; 304 } 305 #endif /* 0 */ 306 307 static int 308 os9k_sizeof_headers (ignore_abfd, ignore) 309 bfd *ignore_abfd ATTRIBUTE_UNUSED; 310 boolean ignore ATTRIBUTE_UNUSED; 311 { 312 return sizeof (struct internal_exec); 313 } 314 315 316 /***********************************************************************/ 317 318 #define aout_32_close_and_cleanup aout_32_bfd_free_cached_info 319 320 #define aout_32_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol 321 322 #define aout_32_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup 323 324 #define aout_32_get_section_contents_in_window \ 325 _bfd_generic_get_section_contents_in_window 326 327 #define os9k_bfd_get_relocated_section_contents \ 328 bfd_generic_get_relocated_section_contents 329 #define os9k_bfd_relax_section bfd_generic_relax_section 330 #define os9k_bfd_gc_sections bfd_generic_gc_sections 331 #define os9k_bfd_link_hash_table_create _bfd_generic_link_hash_table_create 332 #define os9k_bfd_link_add_symbols _bfd_generic_link_add_symbols 333 #define os9k_bfd_final_link _bfd_generic_final_link 334 #define os9k_bfd_link_split_section _bfd_generic_link_split_section 335 336 const bfd_target i386os9k_vec = 337 { 338 "i386os9k", /* name */ 339 bfd_target_os9k_flavour, 340 BFD_ENDIAN_LITTLE, /* data byte order is little */ 341 BFD_ENDIAN_LITTLE, /* hdr byte order is little */ 342 (HAS_RELOC | EXEC_P | WP_TEXT), /* object flags */ 343 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD), /* section flags */ 344 0, /* symbol leading char */ 345 ' ', /* ar_pad_char */ 346 16, /* ar_max_namelen */ 347 348 bfd_getl64, bfd_getl_signed_64, bfd_putl64, 349 bfd_getl32, bfd_getl_signed_32, bfd_putl32, 350 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ 351 bfd_getl64, bfd_getl_signed_64, bfd_putl64, 352 bfd_getl32, bfd_getl_signed_32, bfd_putl32, 353 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ 354 {_bfd_dummy_target, os9k_object_p, /* bfd_check_format */ 355 bfd_generic_archive_p, _bfd_dummy_target}, 356 {bfd_false, bfd_false, /* bfd_set_format */ 357 _bfd_generic_mkarchive, bfd_false}, 358 {bfd_false, bfd_false, /* bfd_write_contents */ 359 _bfd_write_archive_contents, bfd_false}, 360 361 BFD_JUMP_TABLE_GENERIC (aout_32), 362 BFD_JUMP_TABLE_COPY (_bfd_generic), 363 BFD_JUMP_TABLE_CORE (_bfd_nocore), 364 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd), 365 BFD_JUMP_TABLE_SYMBOLS (aout_32), 366 BFD_JUMP_TABLE_RELOCS (aout_32), 367 BFD_JUMP_TABLE_WRITE (aout_32), 368 BFD_JUMP_TABLE_LINK (os9k), 369 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), 370 371 NULL, 372 373 (PTR) 0, 374 }; 375