bfd/i386os9k.c

   1 /* BFD back-end for os9000 i386 binaries.
   2    Copyright 1990, 1991, 1992, 1993 1994 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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21
  22 #include "bfd.h"
  23 #include "sysdep.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 static bfd_target *os9k_callback PARAMS ((bfd *));
  30
  31 /* Swaps the information in an executable header taken from a raw byte
  32    stream memory image, into the internal exec_header structure.  */
  33 void
  34 os9k_swap_exec_header_in (abfd, raw_bytes, execp)
  35      bfd *abfd;
  36      mh_com *raw_bytes;
  37      struct internal_exec *execp;
  38 {
  39   mh_com *bytes = (mh_com *) raw_bytes;
  40   unsigned int dload, dmemsize, dmemstart;
  41
  42   /* Now fill in fields in the execp, from the bytes in the raw data.  */
  43   execp->a_info = bfd_h_get_16 (abfd, bytes->m_sync);
  44   execp->a_syms = 0;
  45   execp->a_entry = bfd_h_get_32 (abfd, bytes->m_exec);
  46   execp->a_talign = 2;
  47   execp->a_dalign = 2;
  48   execp->a_balign = 2;
  49
  50   dload = bfd_h_get_32 (abfd, bytes->m_idata);
  51   execp->a_data = dload + 8;
  52
  53   bfd_seek (abfd, (file_ptr) dload, SEEK_SET);
  54   bfd_read (&dmemstart, sizeof (dmemstart), 1, abfd);
  55   bfd_read (&dmemsize, sizeof (dmemsize), 1, abfd);
  56
  57   execp->a_tload = 0;
  58   execp->a_dload = bfd_h_get_32 (abfd, (unsigned char *) &dmemstart);
  59   execp->a_text = dload - execp->a_tload;
  60   execp->a_data = bfd_h_get_32 (abfd, (unsigned char *) &dmemsize);
  61   execp->a_bss = bfd_h_get_32 (abfd, bytes->m_data) - execp->a_data;
  62
  63   execp->a_trsize = 0;
  64   execp->a_drsize = 0;
  65 }
  66
  67 #if 0
  68 /* Swaps the information in an internal exec header structure into the
  69    supplied buffer ready for writing to disk.  */
  70
  71 PROTO (void, os9k_swap_exec_header_out,
  72          (bfd * abfd,
  73           struct internal_exec * execp,
  74           struct mh_com * raw_bytes));
  75 void
  76 os9k_swap_exec_header_out (abfd, execp, raw_bytes)
  77      bfd *abfd;
  78      struct internal_exec *execp;
  79      mh_com *raw_bytes;
  80 {
  81   mh_com *bytes = (mh_com *) raw_bytes;
  82
  83   /* Now fill in fields in the raw data, from the fields in the exec struct. */
  84   bfd_h_put_32 (abfd, execp->a_info, bytes->e_info);
  85   bfd_h_put_32 (abfd, execp->a_text, bytes->e_text);
  86   bfd_h_put_32 (abfd, execp->a_data, bytes->e_data);
  87   bfd_h_put_32 (abfd, execp->a_bss, bytes->e_bss);
  88   bfd_h_put_32 (abfd, execp->a_syms, bytes->e_syms);
  89   bfd_h_put_32 (abfd, execp->a_entry, bytes->e_entry);
  90   bfd_h_put_32 (abfd, execp->a_trsize, bytes->e_trsize);
  91   bfd_h_put_32 (abfd, execp->a_drsize, bytes->e_drsize);
  92   bfd_h_put_32 (abfd, execp->a_tload, bytes->e_tload);
  93   bfd_h_put_32 (abfd, execp->a_dload, bytes->e_dload);
  94   bytes->e_talign[0] = execp->a_talign;
  95   bytes->e_dalign[0] = execp->a_dalign;
  96   bytes->e_balign[0] = execp->a_balign;
  97   bytes->e_relaxable[0] = execp->a_relaxable;
  98 }
  99
 100 #endif  /* 0 */
 101
 102 static bfd_target *
 103 os9k_object_p (abfd)
 104      bfd *abfd;
 105 {
 106   struct internal_exec anexec;
 107   mh_com exec_bytes;
 108
 109   if (bfd_read ((PTR) & exec_bytes, MHCOM_BYTES_SIZE, 1, abfd)
 110       != MHCOM_BYTES_SIZE)
 111     {
 112       bfd_set_error (bfd_error_wrong_format);
 113       return 0;
 114     }
 115
 116   anexec.a_info = bfd_h_get_16 (abfd, exec_bytes.m_sync);
 117   if (N_BADMAG (anexec))
 118     {
 119       bfd_set_error (bfd_error_wrong_format);
 120       return 0;
 121     }
 122
 123   os9k_swap_exec_header_in (abfd, &exec_bytes, &anexec);
 124   return aout_32_some_aout_object_p (abfd, &anexec, os9k_callback);
 125 }
 126
 127
 128 /* Finish up the opening of a b.out file for reading.  Fill in all the
 129    fields that are not handled by common code.  */
 130
 131 static bfd_target *
 132 os9k_callback (abfd)
 133      bfd *abfd;
 134 {
 135   struct internal_exec *execp = exec_hdr (abfd);
 136   unsigned long bss_start;
 137
 138   /* Architecture and machine type */
 139   bfd_set_arch_mach (abfd, bfd_arch_i386, 0);
 140
 141   /* The positions of the string table and symbol table.  */
 142   obj_str_filepos (abfd) = 0;
 143   obj_sym_filepos (abfd) = 0;
 144
 145   /* The alignments of the sections */
 146   obj_textsec (abfd)->alignment_power = execp->a_talign;
 147   obj_datasec (abfd)->alignment_power = execp->a_dalign;
 148   obj_bsssec (abfd)->alignment_power = execp->a_balign;
 149
 150   /* The starting addresses of the sections.  */
 151   obj_textsec (abfd)->vma = execp->a_tload;
 152   obj_datasec (abfd)->vma = execp->a_dload;
 153
 154   /* And reload the sizes, since the aout module zaps them */
 155   obj_textsec (abfd)->_raw_size = execp->a_text;
 156
 157   bss_start = execp->a_dload + execp->a_data;   /* BSS = end of data section */
 158   obj_bsssec (abfd)->vma = align_power (bss_start, execp->a_balign);
 159
 160   /* The file positions of the sections */
 161   obj_textsec (abfd)->filepos = execp->a_entry;
 162   obj_datasec (abfd)->filepos = execp->a_dload;
 163
 164   /* The file positions of the relocation info ***
 165   obj_textsec (abfd)->rel_filepos = N_TROFF(*execp);
 166   obj_datasec (abfd)->rel_filepos =  N_DROFF(*execp);
 167   */
 168
 169   adata (abfd).page_size = 1;   /* Not applicable. */
 170   adata (abfd).segment_size = 1;/* Not applicable. */
 171   adata (abfd).exec_bytes_size = MHCOM_BYTES_SIZE;
 172
 173   return abfd->xvec;
 174 }
 175
 176 #if 0
 177 struct bout_data_struct
 178 {
 179   struct aoutdata a;
 180   struct internal_exec e;
 181 };
 182
 183 static boolean
 184 os9k_mkobject (abfd)
 185      bfd *abfd;
 186 {
 187   struct bout_data_struct *rawptr;
 188
 189   rawptr = (struct bout_data_struct *) bfd_zalloc (abfd, sizeof (struct bout_data_struct));
 190   if (rawptr == NULL)
 191     {
 192       bfd_set_error (bfd_error_no_memory);
 193       return false;
 194     }
 195
 196   abfd->tdata.bout_data = rawptr;
 197   exec_hdr (abfd) = &rawptr->e;
 198
 199   /* For simplicity's sake we just make all the sections right here. */
 200   obj_textsec (abfd) = (asection *) NULL;
 201   obj_datasec (abfd) = (asection *) NULL;
 202   obj_bsssec (abfd) = (asection *) NULL;
 203
 204   bfd_make_section (abfd, ".text");
 205   bfd_make_section (abfd, ".data");
 206   bfd_make_section (abfd, ".bss");
 207
 208   return true;
 209 }
 210
 211 static boolean
 212 os9k_write_object_contents (abfd)
 213      bfd *abfd;
 214 {
 215   struct external_exec swapped_hdr;
 216
 217   exec_hdr (abfd)->a_info = BMAGIC;
 218
 219   exec_hdr (abfd)->a_text = obj_textsec (abfd)->_raw_size;
 220   exec_hdr (abfd)->a_data = obj_datasec (abfd)->_raw_size;
 221   exec_hdr (abfd)->a_bss = obj_bsssec (abfd)->_raw_size;
 222   exec_hdr (abfd)->a_syms = bfd_get_symcount (abfd) * sizeof (struct nlist);
 223   exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
 224   exec_hdr (abfd)->a_trsize = ((obj_textsec (abfd)->reloc_count) *
 225                                sizeof (struct relocation_info));
 226   exec_hdr (abfd)->a_drsize = ((obj_datasec (abfd)->reloc_count) *
 227                                sizeof (struct relocation_info));
 228
 229   exec_hdr (abfd)->a_talign = obj_textsec (abfd)->alignment_power;
 230   exec_hdr (abfd)->a_dalign = obj_datasec (abfd)->alignment_power;
 231   exec_hdr (abfd)->a_balign = obj_bsssec (abfd)->alignment_power;
 232
 233   exec_hdr (abfd)->a_tload = obj_textsec (abfd)->vma;
 234   exec_hdr (abfd)->a_dload = obj_datasec (abfd)->vma;
 235
 236   bout_swap_exec_header_out (abfd, exec_hdr (abfd), &swapped_hdr);
 237
 238   bfd_seek (abfd, (file_ptr) 0, SEEK_SET);
 239   bfd_write ((PTR) & swapped_hdr, 1, EXEC_BYTES_SIZE, abfd);
 240
 241   /* Now write out reloc info, followed by syms and strings */
 242   if (bfd_get_symcount (abfd) != 0)
 243     {
 244       bfd_seek (abfd, (file_ptr) (N_SYMOFF (*exec_hdr (abfd))), SEEK_SET);
 245
 246       if (!aout_32_write_syms (abfd))
 247         return false;
 248
 249       bfd_seek (abfd, (file_ptr) (N_TROFF (*exec_hdr (abfd))), SEEK_SET);
 250
 251       if (!b_out_squirt_out_relocs (abfd, obj_textsec (abfd)))
 252         return false;
 253       bfd_seek (abfd, (file_ptr) (N_DROFF (*exec_hdr (abfd))), SEEK_SET);
 254
 255       if (!b_out_squirt_out_relocs (abfd, obj_datasec (abfd)))
 256         return false;
 257     }
 258   return true;
 259 }
 260 \f
 261 static boolean
 262 os9k_set_section_contents (abfd, section, location, offset, count)
 263      bfd *abfd;
 264      sec_ptr section;
 265      unsigned char *location;
 266      file_ptr offset;
 267      int count;
 268 {
 269
 270   if (abfd->output_has_begun == false)
 271     {                           /* set by bfd.c handler */
 272       if ((obj_textsec (abfd) == NULL) || (obj_datasec (abfd) == NULL)  /*||
 273                   (obj_textsec (abfd)->_cooked_size == 0) || (obj_datasec (abfd)->_cooked_size == 0)*/ )
 274         {
 275           bfd_set_error (bfd_error_invalid_operation);
 276           return false;
 277         }
 278
 279       obj_textsec (abfd)->filepos = sizeof (struct internal_exec);
 280       obj_datasec (abfd)->filepos = obj_textsec (abfd)->filepos
 281         + obj_textsec (abfd)->_raw_size;
 282
 283     }
 284   /* regardless, once we know what we're doing, we might as well get going */
 285   bfd_seek (abfd, section->filepos + offset, SEEK_SET);
 286
 287   if (count != 0)
 288     {
 289       return (bfd_write ((PTR) location, 1, count, abfd) == count) ? true : false;
 290     }
 291   return true;
 292 }
 293 #endif  /* 0 */
 294
 295 static int
 296 os9k_sizeof_headers (ignore_abfd, ignore)
 297      bfd *ignore_abfd;
 298      boolean ignore;
 299 {
 300   return sizeof (struct internal_exec);
 301 }
 302
 303
 304 /***********************************************************************/
 305
 306 /* We don't have core files.  */
 307 #define aout_32_core_file_failing_command _bfd_dummy_core_file_failing_command
 308 #define aout_32_core_file_failing_signal _bfd_dummy_core_file_failing_signal
 309 #define aout_32_core_file_matches_executable_p  \
 310                                 _bfd_dummy_core_file_matches_executable_p
 311
 312 /* We use BSD-Unix generic archive files.  */
 313 #define aout_32_openr_next_archived_file        bfd_generic_openr_next_archived_file
 314 #define aout_32_generic_stat_arch_elt   bfd_generic_stat_arch_elt
 315 #define aout_32_slurp_armap             bfd_slurp_bsd_armap
 316 #define aout_32_slurp_extended_name_table       _bfd_slurp_extended_name_table
 317 #define aout_32_write_armap             bsd_write_armap
 318 #define aout_32_truncate_arname         bfd_bsd_truncate_arname
 319
 320 /* We override these routines from the usual a.out file routines.  */
 321 #define aout_32_canonicalize_reloc      bfd_canonicalize_reloc
 322 #define aout_32_get_reloc_upper_bound   bfd_get_reloc_upper_bound
 323 #define aout_32_set_section_contents    bfd_set_section_contents
 324 #define aout_32_set_arch_mach           bfd_default_set_arch_mach
 325 #define aout_32_sizeof_headers          os9k_sizeof_headers
 326
 327 #define aout_32_bfd_debug_info_start            bfd_void
 328 #define aout_32_bfd_debug_info_end              bfd_void
 329 #define aout_32_bfd_debug_info_accumulate       (PROTO(void,(*),(bfd*, struct sec *))) bfd_void
 330
 331 #define aout_32_bfd_make_debug_symbol \
 332   ((asymbol *(*) PARAMS ((bfd *, void *, unsigned long))) bfd_nullvoidptr)
 333 #define aout_32_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
 334 #define aout_32_bfd_link_add_symbols _bfd_generic_link_add_symbols
 335 #define aout_32_bfd_final_link _bfd_generic_final_link
 336 #define aout_32_bfd_get_relocated_section_contents  bfd_generic_get_relocated_section_contents
 337 #define aout_32_bfd_relax_section                   bfd_generic_relax_section
 338 #define aout_32_bfd_reloc_type_lookup \
 339   ((CONST struct reloc_howto_struct *(*) PARAMS \
 340 ((bfd *, bfd_reloc_code_real_type))) bfd_nullvoidptr)
 341 #define aout_32_bfd_free_cached_info bfd_true
 342
 343 bfd_target i386os9k_vec =
 344 {
 345   "i386os9k",                   /* name */
 346   bfd_target_os9k_flavour,
 347   false,                        /* data byte order is little */
 348   false,                        /* hdr byte order is big */
 349   (HAS_RELOC | EXEC_P | WP_TEXT),       /* object flags */
 350   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD),    /* section flags */
 351   0,                            /* symbol leading char */
 352   ' ',                          /* ar_pad_char */
 353   16,                           /* ar_max_namelen */
 354   2,                            /* minumum alignment power */
 355
 356   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 357   bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 358   bfd_getl16, bfd_getl_signed_16, bfd_putl16,   /* data */
 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,   /* hdrs */
 362   {_bfd_dummy_target, os9k_object_p,    /* bfd_check_format */
 363    bfd_generic_archive_p, _bfd_dummy_target},
 364   {bfd_false, bfd_false,        /* bfd_set_format */
 365    _bfd_generic_mkarchive, bfd_false},
 366   {bfd_false, bfd_false,        /* bfd_write_contents */
 367    _bfd_write_archive_contents, bfd_false},
 368
 369   JUMP_TABLE (aout_32),
 370   (PTR) 0,
 371 };