bfd/osf-core.c

   1 /* BFD back-end for OSF/1 core files.
   2    Copyright 1993 Free Software Foundation, Inc.
   3
   4 This file is part of BFD, the Binary File Descriptor library.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 /* This file can only be compiled on systems which use OSF/1 style
  21    core files.  In the config/XXXXXX.mh file for such a system add
  22       HDEFINES=-DOSF_CORE
  23       HDEPFILES=osf-core.o
  24    */
  25
  26 #include "bfd.h"
  27 #include "sysdep.h"
  28 #include "libbfd.h"
  29
  30 #include <stdio.h>
  31 #include <string.h>
  32 #include <sys/user.h>
  33 #include <sys/core.h>
  34
  35 /* forward declarations */
  36
  37 static asection *
  38 make_bfd_asection PARAMS ((bfd *, CONST char *, flagword, bfd_size_type,
  39                            bfd_vma, file_ptr));
  40 static asymbol *
  41 osf_core_make_empty_symbol PARAMS ((bfd *));
  42 static bfd_target *
  43 osf_core_core_file_p PARAMS ((bfd *));
  44 static char *
  45 osf_core_core_file_failing_command PARAMS ((bfd *));
  46 static int
  47 osf_core_core_file_failing_signal PARAMS ((bfd *));
  48 static boolean
  49 osf_core_core_file_matches_executable_p PARAMS ((bfd *, bfd *));
  50 static void
  51 swap_abort PARAMS ((void));
  52
  53 /* These are stored in the bfd's tdata */
  54
  55 struct osf_core_struct
  56 {
  57   int sig;
  58   char cmd[MAXCOMLEN + 1];
  59 };
  60
  61 #define core_hdr(bfd) ((bfd)->tdata.osf_core_data)
  62 #define core_signal(bfd) (core_hdr(bfd)->sig)
  63 #define core_command(bfd) (core_hdr(bfd)->cmd)
  64
  65 static asection *
  66 make_bfd_asection (abfd, name, flags, _raw_size, vma, filepos)
  67      bfd *abfd;
  68      CONST char *name;
  69      flagword flags;
  70      bfd_size_type _raw_size;
  71      bfd_vma vma;
  72      file_ptr filepos;
  73 {
  74   asection *asect;
  75
  76   asect = bfd_make_section (abfd, name);
  77   if (!asect)
  78     return NULL;
  79
  80   asect->flags = flags;
  81   asect->_raw_size = _raw_size;
  82   asect->vma = vma;
  83   asect->filepos = filepos;
  84   asect->alignment_power = 8;
  85
  86   return asect;
  87 }
  88
  89 static asymbol *
  90 osf_core_make_empty_symbol (abfd)
  91      bfd *abfd;
  92 {
  93   asymbol *new = (asymbol *) bfd_zalloc (abfd, sizeof (asymbol));
  94   if (new)
  95     new->the_bfd = abfd;
  96   return new;
  97 }
  98
  99 static bfd_target *
 100 osf_core_core_file_p (abfd)
 101      bfd *abfd;
 102 {
 103   int val;
 104   int i;
 105   char *secname;
 106   struct core_filehdr core_header;
 107   int dseccnt = 0;
 108
 109   val = bfd_read ((PTR)&core_header, 1, sizeof core_header, abfd);
 110   if (val != sizeof core_header)
 111     return NULL;
 112
 113   if (strncmp (core_header.magic, "Core", 4) != 0)
 114     return NULL;
 115
 116   core_hdr (abfd) = (struct osf_core_struct *)
 117     bfd_zalloc (abfd, sizeof (struct osf_core_struct));
 118   if (!core_hdr (abfd))
 119     return NULL;
 120
 121   strncpy (core_command (abfd), core_header.name, MAXCOMLEN + 1);
 122   core_signal (abfd) = core_header.signo;
 123
 124   for (i = 0; i < core_header.nscns; i++)
 125     {
 126       struct core_scnhdr core_scnhdr;
 127
 128       val = bfd_read ((PTR)&core_scnhdr, 1, sizeof core_scnhdr, abfd);
 129       if (val != sizeof core_scnhdr)
 130         break;
 131
 132       /* Skip empty sections.  */
 133       if (core_scnhdr.size == 0 || core_scnhdr.scnptr == 0)
 134         continue;
 135
 136       switch (core_scnhdr.scntype)
 137         {
 138         case SCNRGN:
 139           /* OSF/1 has multiple data sections (data, bss and data/bss sections
 140              for shared libraries), but bfd doesn't permit data sections with
 141              the same name. Construct a unique section name.  */
 142           secname = bfd_alloc (abfd, 40);
 143           if (!secname)
 144             {
 145               bfd_set_error (bfd_error_no_memory);
 146               return NULL;
 147             }
 148           sprintf (secname, ".data%d", dseccnt++);
 149           break;
 150         case SCNSTACK:
 151           secname = ".stack";
 152           break;
 153         case SCNREGS:
 154           secname = ".reg";
 155           break;
 156         default:
 157           fprintf (stderr, "Unhandled OSF/1 core file section type %d\n",
 158                    core_scnhdr.scntype);
 159           continue;
 160         }
 161
 162       if (!make_bfd_asection (abfd, secname,
 163                               SEC_ALLOC+SEC_LOAD+SEC_HAS_CONTENTS,
 164                               (bfd_size_type) core_scnhdr.size,
 165                               (bfd_vma) core_scnhdr.vaddr,
 166                               (file_ptr) core_scnhdr.scnptr))
 167         return NULL;
 168     }
 169
 170   /* OK, we believe you.  You're a core file (sure, sure).  */
 171
 172   return abfd->xvec;
 173 }
 174
 175 static char *
 176 osf_core_core_file_failing_command (abfd)
 177      bfd *abfd;
 178 {
 179   return core_command (abfd);
 180 }
 181
 182 /* ARGSUSED */
 183 static int
 184 osf_core_core_file_failing_signal (abfd)
 185      bfd *abfd;
 186 {
 187   return core_signal (abfd);
 188 }
 189
 190 /* ARGSUSED */
 191 static boolean
 192 osf_core_core_file_matches_executable_p (core_bfd, exec_bfd)
 193      bfd *core_bfd, *exec_bfd;
 194 {
 195   return true;          /* FIXME, We have no way of telling at this point */
 196 }
 197 \f
 198 /* No archive file support via this BFD */
 199 #define osf_core_openr_next_archived_file       bfd_generic_openr_next_archived_file
 200 #define osf_core_generic_stat_arch_elt          bfd_generic_stat_arch_elt
 201 #define osf_core_slurp_armap                    bfd_false
 202 #define osf_core_slurp_extended_name_table      bfd_true
 203 #define osf_core_write_armap                    (boolean (*) PARAMS     \
 204     ((bfd *arch, unsigned int elength, struct orl *map, \
 205       unsigned int orl_count, int stridx))) bfd_false
 206 #define osf_core_truncate_arname                bfd_dont_truncate_arname
 207
 208 #define osf_core_close_and_cleanup              bfd_generic_close_and_cleanup
 209 #define osf_core_set_section_contents           (boolean (*) PARAMS     \
 210         ((bfd *abfd, asection *section, PTR data, file_ptr offset,      \
 211         bfd_size_type count))) bfd_generic_set_section_contents
 212 #define osf_core_get_section_contents           bfd_generic_get_section_contents
 213 #define osf_core_new_section_hook               (boolean (*) PARAMS     \
 214         ((bfd *, sec_ptr))) bfd_true
 215 #define osf_core_get_symtab_upper_bound bfd_0l
 216 #define osf_core_get_symtab                     (long (*) PARAMS \
 217         ((bfd *, struct symbol_cache_entry **))) bfd_0l
 218 #define osf_core_get_reloc_upper_bound          (long (*) PARAMS \
 219         ((bfd *, sec_ptr))) bfd_0l
 220 #define osf_core_canonicalize_reloc             (long (*) PARAMS \
 221         ((bfd *, sec_ptr, arelent **, struct symbol_cache_entry**))) bfd_0l
 222 #define osf_core_print_symbol                   (void (*) PARAMS        \
 223         ((bfd *, PTR, struct symbol_cache_entry  *,                     \
 224         bfd_print_symbol_type))) bfd_false
 225 #define osf_core_get_symbol_info                (void (*) PARAMS        \
 226         ((bfd *, struct symbol_cache_entry  *,                  \
 227         symbol_info *))) bfd_false
 228 #define osf_core_get_lineno                     (alent * (*) PARAMS     \
 229         ((bfd *, struct symbol_cache_entry *))) bfd_nullvoidptr
 230 #define osf_core_set_arch_mach                  (boolean (*) PARAMS     \
 231         ((bfd *, enum bfd_architecture, unsigned long))) bfd_false
 232 #define osf_core_find_nearest_line              (boolean (*) PARAMS     \
 233         ((bfd *abfd, struct sec  *section,                              \
 234          struct symbol_cache_entry  **symbols,bfd_vma offset,           \
 235          CONST char **file, CONST char **func, unsigned int *line))) bfd_false
 236 #define osf_core_sizeof_headers         (int (*) PARAMS \
 237         ((bfd *, boolean))) bfd_0
 238
 239 #define osf_core_bfd_debug_info_start           bfd_void
 240 #define osf_core_bfd_debug_info_end             bfd_void
 241 #define osf_core_bfd_debug_info_accumulate      (void (*) PARAMS        \
 242         ((bfd *, struct sec *))) bfd_void
 243 #define osf_core_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
 244 #define osf_core_bfd_relax_section              bfd_generic_relax_section
 245 #define osf_core_bfd_reloc_type_lookup \
 246   ((CONST struct reloc_howto_struct *(*) PARAMS ((bfd *, bfd_reloc_code_real_type))) bfd_nullvoidptr)
 247 #define osf_core_bfd_make_debug_symbol \
 248   ((asymbol *(*) PARAMS ((bfd *, void *, unsigned long))) bfd_nullvoidptr)
 249 #define osf_core_bfd_link_hash_table_create \
 250   ((struct bfd_link_hash_table *(*) PARAMS ((bfd *))) bfd_nullvoidptr)
 251 #define osf_core_bfd_link_add_symbols \
 252   ((boolean (*) PARAMS ((bfd *, struct bfd_link_info *))) bfd_false)
 253 #define osf_core_bfd_final_link \
 254   ((boolean (*) PARAMS ((bfd *, struct bfd_link_info *))) bfd_false)
 255 #define osf_core_bfd_copy_private_section_data \
 256   ((boolean (*) PARAMS ((bfd *, asection *, bfd *, asection *))) bfd_false)
 257 #define osf_core_bfd_copy_private_bfd_data \
 258   ((boolean (*) PARAMS ((bfd *, bfd *))) bfd_false)
 259 #define osf_core_bfd_is_local_label \
 260   ((boolean (*) PARAMS ((bfd *, asymbol *))) bfd_false)
 261
 262 /* If somebody calls any byte-swapping routines, shoot them.  */
 263 static void
 264 swap_abort()
 265 {
 266   abort(); /* This way doesn't require any declaration for ANSI to fuck up */
 267 }
 268 #define NO_GET  ((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )
 269 #define NO_PUT  ((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
 270 #define NO_SIGNED_GET \
 271   ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
 272
 273 bfd_target osf_core_vec =
 274   {
 275     "osf-core",
 276     bfd_target_unknown_flavour,
 277     true,                       /* target byte order */
 278     true,                       /* target headers byte order */
 279     (HAS_RELOC | EXEC_P |       /* object flags */
 280      HAS_LINENO | HAS_DEBUG |
 281      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 282     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 283     0,                                                     /* symbol prefix */
 284     ' ',                                                   /* ar_pad_char */
 285     16,                                                    /* ar_max_namelen */
 286     3,                                                     /* minimum alignment power */
 287     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit data */
 288     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit data */
 289     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit data */
 290     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit hdrs */
 291     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit hdrs */
 292     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit hdrs */
 293
 294     {                           /* bfd_check_format */
 295      _bfd_dummy_target,         /* unknown format */
 296      _bfd_dummy_target,         /* object file */
 297      _bfd_dummy_target,         /* archive */
 298      osf_core_core_file_p       /* a core file */
 299     },
 300     {                           /* bfd_set_format */
 301      bfd_false, bfd_false,
 302      bfd_false, bfd_false
 303     },
 304     {                           /* bfd_write_contents */
 305      bfd_false, bfd_false,
 306      bfd_false, bfd_false
 307     },
 308
 309     JUMP_TABLE(osf_core),
 310     (PTR) 0                     /* backend_data */
 311 };