1/* BFD back-end for os9000 i386 binaries. 2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2001, 2002, 3 2004 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., 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 30static const bfd_target * os9k_callback 31 PARAMS ((bfd *)); 32static const bfd_target * os9k_object_p 33 PARAMS ((bfd *)); 34static int os9k_sizeof_headers 35 PARAMS ((bfd *, bfd_boolean)); 36bfd_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. */ 41bfd_boolean 42os9k_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#if 0 81/* Swaps the information in an internal exec header structure into the 82 supplied buffer ready for writing to disk. */ 83 84void os9k_swap_exec_header_out 85 PARAMS ((bfd *, struct internal_exec *, struct mh_com *)); 86 87void 88os9k_swap_exec_header_out (abfd, execp, raw_bytes) 89 bfd *abfd; 90 struct internal_exec *execp; 91 mh_com *raw_bytes; 92{ 93 mh_com *bytes = (mh_com *) raw_bytes; 94 95 /* Now fill in fields in the raw data, from the fields in the exec struct. */ 96 H_PUT_32 (abfd, execp->a_info, bytes->e_info); 97 H_PUT_32 (abfd, execp->a_text, bytes->e_text); 98 H_PUT_32 (abfd, execp->a_data, bytes->e_data); 99 H_PUT_32 (abfd, execp->a_bss, bytes->e_bss); 100 H_PUT_32 (abfd, execp->a_syms, bytes->e_syms); 101 H_PUT_32 (abfd, execp->a_entry, bytes->e_entry); 102 H_PUT_32 (abfd, execp->a_trsize, bytes->e_trsize); 103 H_PUT_32 (abfd, execp->a_drsize, bytes->e_drsize); 104 H_PUT_32 (abfd, execp->a_tload, bytes->e_tload); 105 H_PUT_32 (abfd, execp->a_dload, bytes->e_dload); 106 bytes->e_talign[0] = execp->a_talign; 107 bytes->e_dalign[0] = execp->a_dalign; 108 bytes->e_balign[0] = execp->a_balign; 109 bytes->e_relaxable[0] = execp->a_relaxable; 110} 111 112#endif /* 0 */ 113 114static const bfd_target * 115os9k_object_p (abfd) 116 bfd *abfd; 117{ 118 struct internal_exec anexec; 119 mh_com exec_bytes; 120 121 if (bfd_bread ((PTR) &exec_bytes, (bfd_size_type) MHCOM_BYTES_SIZE, abfd) 122 != MHCOM_BYTES_SIZE) 123 { 124 if (bfd_get_error () != bfd_error_system_call) 125 bfd_set_error (bfd_error_wrong_format); 126 return 0; 127 } 128 129 anexec.a_info = H_GET_16 (abfd, exec_bytes.m_sync); 130 if (N_BADMAG (anexec)) 131 { 132 bfd_set_error (bfd_error_wrong_format); 133 return 0; 134 } 135 136 if (! os9k_swap_exec_header_in (abfd, &exec_bytes, &anexec)) 137 { 138 if (bfd_get_error () != bfd_error_system_call) 139 bfd_set_error (bfd_error_wrong_format); 140 return NULL; 141 } 142 return aout_32_some_aout_object_p (abfd, &anexec, os9k_callback); 143} 144 145 146/* Finish up the opening of a b.out file for reading. Fill in all the 147 fields that are not handled by common code. */ 148 149static const bfd_target * 150os9k_callback (abfd) 151 bfd *abfd; 152{ 153 struct internal_exec *execp = exec_hdr (abfd); 154 unsigned long bss_start; 155 156 /* Architecture and machine type. */ 157 bfd_set_arch_mach (abfd, bfd_arch_i386, 0); 158 159 /* The positions of the string table and symbol table. */ 160 obj_str_filepos (abfd) = 0; 161 obj_sym_filepos (abfd) = 0; 162 163 /* The alignments of the sections. */ 164 obj_textsec (abfd)->alignment_power = execp->a_talign; 165 obj_datasec (abfd)->alignment_power = execp->a_dalign; 166 obj_bsssec (abfd)->alignment_power = execp->a_balign; 167 168 /* The starting addresses of the sections. */ 169 obj_textsec (abfd)->vma = execp->a_tload; 170 obj_datasec (abfd)->vma = execp->a_dload; 171 172 /* And reload the sizes, since the aout module zaps them. */ 173 obj_textsec (abfd)->size = execp->a_text; 174 175 bss_start = execp->a_dload + execp->a_data; /* BSS = end of data section. */ 176 obj_bsssec (abfd)->vma = align_power (bss_start, execp->a_balign); 177 178 /* The file positions of the sections. */ 179 obj_textsec (abfd)->filepos = execp->a_entry; 180 obj_datasec (abfd)->filepos = execp->a_dload; 181 182 /* The file positions of the relocation info *** 183 obj_textsec (abfd)->rel_filepos = N_TROFF(*execp); 184 obj_datasec (abfd)->rel_filepos = N_DROFF(*execp); */ 185 186 adata (abfd).page_size = 1; /* Not applicable. */ 187 adata (abfd).segment_size = 1;/* Not applicable. */ 188 adata (abfd).exec_bytes_size = MHCOM_BYTES_SIZE; 189 190 return abfd->xvec; 191} 192 193#if 0 194struct bout_data_struct 195{ 196 struct aoutdata a; 197 struct internal_exec e; 198}; 199 200static bfd_boolean 201os9k_mkobject (abfd) 202 bfd *abfd; 203{ 204 struct bout_data_struct *rawptr; 205 bfd_size_type amt = sizeof (struct bout_data_struct); 206 207 rawptr = (struct bout_data_struct *) bfd_zalloc (abfd, amt); 208 if (rawptr == NULL) 209 return FALSE; 210 211 abfd->tdata.bout_data = rawptr; 212 exec_hdr (abfd) = &rawptr->e; 213 214 obj_textsec (abfd) = (asection *) NULL; 215 obj_datasec (abfd) = (asection *) NULL; 216 obj_bsssec (abfd) = (asection *) NULL; 217 218 return TRUE; 219} 220 221static bfd_boolean 222os9k_write_object_contents (abfd) 223 bfd *abfd; 224{ 225 struct external_exec swapped_hdr; 226 227 if (! aout_32_make_sections (abfd)) 228 return FALSE; 229 230 exec_hdr (abfd)->a_info = BMAGIC; 231 232 exec_hdr (abfd)->a_text = obj_textsec (abfd)->size; 233 exec_hdr (abfd)->a_data = obj_datasec (abfd)->size; 234 exec_hdr (abfd)->a_bss = obj_bsssec (abfd)->size; 235 exec_hdr (abfd)->a_syms = bfd_get_symcount (abfd) * sizeof (struct nlist); 236 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd); 237 exec_hdr (abfd)->a_trsize = ((obj_textsec (abfd)->reloc_count) * 238 sizeof (struct relocation_info)); 239 exec_hdr (abfd)->a_drsize = ((obj_datasec (abfd)->reloc_count) * 240 sizeof (struct relocation_info)); 241 242 exec_hdr (abfd)->a_talign = obj_textsec (abfd)->alignment_power; 243 exec_hdr (abfd)->a_dalign = obj_datasec (abfd)->alignment_power; 244 exec_hdr (abfd)->a_balign = obj_bsssec (abfd)->alignment_power; 245 246 exec_hdr (abfd)->a_tload = obj_textsec (abfd)->vma; 247 exec_hdr (abfd)->a_dload = obj_datasec (abfd)->vma; 248 249 bout_swap_exec_header_out (abfd, exec_hdr (abfd), &swapped_hdr); 250 251 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 252 || bfd_bwrite ((PTR) & swapped_hdr, (bfd_size_type) EXEC_BYTES_SIZE, 253 abfd) != EXEC_BYTES_SIZE) 254 return FALSE; 255 256 /* Now write out reloc info, followed by syms and strings. */ 257 if (bfd_get_symcount (abfd) != 0) 258 { 259 if (bfd_seek (abfd, (file_ptr) (N_SYMOFF (*exec_hdr (abfd))), SEEK_SET) 260 != 0) 261 return FALSE; 262 263 if (!aout_32_write_syms (abfd)) 264 return FALSE; 265 266 if (bfd_seek (abfd, (file_ptr) (N_TROFF (*exec_hdr (abfd))), SEEK_SET) 267 != 0) 268 return FALSE; 269 270 if (!b_out_squirt_out_relocs (abfd, obj_textsec (abfd))) 271 return FALSE; 272 if (bfd_seek (abfd, (file_ptr) (N_DROFF (*exec_hdr (abfd))), SEEK_SET) 273 != 0) 274 return FALSE; 275 276 if (!b_out_squirt_out_relocs (abfd, obj_datasec (abfd))) 277 return FALSE; 278 } 279 return TRUE; 280} 281 282static bfd_boolean 283os9k_set_section_contents (abfd, section, location, offset, count) 284 bfd *abfd; 285 sec_ptr section; 286 unsigned char *location; 287 file_ptr offset; 288 int count; 289{ 290 291 if (! abfd->output_has_begun) 292 { /* set by bfd.c handler */ 293 if (! aout_32_make_sections (abfd)) 294 return FALSE; 295 296 obj_textsec (abfd)->filepos = sizeof (struct internal_exec); 297 obj_datasec (abfd)->filepos = obj_textsec (abfd)->filepos 298 + obj_textsec (abfd)->size; 299 300 } 301 /* Regardless, once we know what we're doing, we might as well get going. */ 302 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0) 303 return FALSE; 304 305 if (count != 0) 306 return bfd_bwrite ((PTR) location, (bfd_size_type) count, abfd) == count; 307 308 return TRUE; 309} 310#endif /* 0 */ 311 312static int 313os9k_sizeof_headers (ignore_abfd, ignore) 314 bfd *ignore_abfd ATTRIBUTE_UNUSED; 315 bfd_boolean ignore ATTRIBUTE_UNUSED; 316{ 317 return sizeof (struct internal_exec); 318} 319 320 321 322#define aout_32_close_and_cleanup aout_32_bfd_free_cached_info 323 324#define aout_32_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol 325 326#define aout_32_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup 327 328#define aout_32_get_section_contents_in_window \ 329 _bfd_generic_get_section_contents_in_window 330 331#define os9k_bfd_get_relocated_section_contents \ 332 bfd_generic_get_relocated_section_contents 333#define os9k_bfd_relax_section bfd_generic_relax_section 334#define os9k_bfd_gc_sections bfd_generic_gc_sections 335#define os9k_bfd_merge_sections bfd_generic_merge_sections 336#define os9k_bfd_is_group_section bfd_generic_is_group_section 337#define os9k_bfd_discard_group bfd_generic_discard_group 338#define os9k_section_already_linked \ 339 _bfd_generic_section_already_linked 340#define os9k_bfd_link_hash_table_create _bfd_generic_link_hash_table_create 341#define os9k_bfd_link_hash_table_free _bfd_generic_link_hash_table_free 342#define os9k_bfd_link_add_symbols _bfd_generic_link_add_symbols 343#define os9k_bfd_link_just_syms _bfd_generic_link_just_syms 344#define os9k_bfd_final_link _bfd_generic_final_link 345#define os9k_bfd_link_split_section _bfd_generic_link_split_section 346 347const bfd_target i386os9k_vec = 348 { 349 "i386os9k", /* name */ 350 bfd_target_os9k_flavour, 351 BFD_ENDIAN_LITTLE, /* data byte order is little */ 352 BFD_ENDIAN_LITTLE, /* hdr byte order is little */ 353 (HAS_RELOC | EXEC_P | WP_TEXT), /* object flags */ 354 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD), /* section flags */ 355 0, /* symbol leading char */ 356 ' ', /* ar_pad_char */ 357 16, /* ar_max_namelen */ 358 359 bfd_getl64, bfd_getl_signed_64, bfd_putl64, 360 bfd_getl32, bfd_getl_signed_32, bfd_putl32, 361 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ 362 bfd_getl64, bfd_getl_signed_64, bfd_putl64, 363 bfd_getl32, bfd_getl_signed_32, bfd_putl32, 364 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ 365 {_bfd_dummy_target, os9k_object_p, /* bfd_check_format */ 366 bfd_generic_archive_p, _bfd_dummy_target}, 367 {bfd_false, bfd_false, /* bfd_set_format */ 368 _bfd_generic_mkarchive, bfd_false}, 369 {bfd_false, bfd_false, /* bfd_write_contents */ 370 _bfd_write_archive_contents, bfd_false}, 371 372 BFD_JUMP_TABLE_GENERIC (aout_32), 373 BFD_JUMP_TABLE_COPY (_bfd_generic), 374 BFD_JUMP_TABLE_CORE (_bfd_nocore), 375 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd), 376 BFD_JUMP_TABLE_SYMBOLS (aout_32), 377 BFD_JUMP_TABLE_RELOCS (aout_32), 378 BFD_JUMP_TABLE_WRITE (aout_32), 379 BFD_JUMP_TABLE_LINK (os9k), 380 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), 381 382 NULL, 383 384 (PTR) 0, 385 }; 386