bfd/osf-core.c

   1 /* BFD back-end for OSF/1 core files.
   2    Copyright 1993, 1994, 1995, 1998, 1999, 2001, 2002
   3    Free Software Foundation, Inc.
   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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 /* This file can only be compiled on systems which use OSF/1 style
  22    core files.  */
  23
  24 #include "bfd.h"
  25 #include "sysdep.h"
  26 #include "libbfd.h"
  27
  28 #include <sys/user.h>
  29 #include <sys/core.h>
  30
  31 /* forward declarations */
  32
  33 static asection *
  34 make_bfd_asection PARAMS ((bfd *, const char *, flagword, bfd_size_type,
  35                            bfd_vma, file_ptr));
  36 static asymbol *
  37 osf_core_make_empty_symbol PARAMS ((bfd *));
  38 static const bfd_target *
  39 osf_core_core_file_p PARAMS ((bfd *));
  40 static char *
  41 osf_core_core_file_failing_command PARAMS ((bfd *));
  42 static int
  43 osf_core_core_file_failing_signal PARAMS ((bfd *));
  44 static boolean
  45 osf_core_core_file_matches_executable_p PARAMS ((bfd *, bfd *));
  46 static void
  47 swap_abort PARAMS ((void));
  48
  49 /* These are stored in the bfd's tdata */
  50
  51 struct osf_core_struct
  52 {
  53   int sig;
  54   char cmd[MAXCOMLEN + 1];
  55 };
  56
  57 #define core_hdr(bfd) ((bfd)->tdata.osf_core_data)
  58 #define core_signal(bfd) (core_hdr(bfd)->sig)
  59 #define core_command(bfd) (core_hdr(bfd)->cmd)
  60
  61 static asection *
  62 make_bfd_asection (abfd, name, flags, _raw_size, vma, filepos)
  63      bfd *abfd;
  64      const char *name;
  65      flagword flags;
  66      bfd_size_type _raw_size;
  67      bfd_vma vma;
  68      file_ptr filepos;
  69 {
  70   asection *asect;
  71
  72   asect = bfd_make_section_anyway (abfd, name);
  73   if (!asect)
  74     return NULL;
  75
  76   asect->flags = flags;
  77   asect->_raw_size = _raw_size;
  78   asect->vma = vma;
  79   asect->filepos = filepos;
  80   asect->alignment_power = 8;
  81
  82   return asect;
  83 }
  84
  85 static asymbol *
  86 osf_core_make_empty_symbol (abfd)
  87      bfd *abfd;
  88 {
  89   asymbol *new;
  90
  91   new = (asymbol *) bfd_zalloc (abfd, (bfd_size_type) sizeof (asymbol));
  92   if (new)
  93     new->the_bfd = abfd;
  94   return new;
  95 }
  96
  97 static const bfd_target *
  98 osf_core_core_file_p (abfd)
  99      bfd *abfd;
 100 {
 101   int val;
 102   int i;
 103   char *secname;
 104   struct core_filehdr core_header;
 105   bfd_size_type amt;
 106
 107   amt = sizeof core_header;
 108   val = bfd_bread ((PTR) &core_header, amt, abfd);
 109   if (val != sizeof core_header)
 110     return NULL;
 111
 112   if (strncmp (core_header.magic, "Core", 4) != 0)
 113     return NULL;
 114
 115   core_hdr (abfd) = (struct osf_core_struct *)
 116     bfd_zalloc (abfd, (bfd_size_type) sizeof (struct osf_core_struct));
 117   if (!core_hdr (abfd))
 118     return NULL;
 119
 120   strncpy (core_command (abfd), core_header.name, MAXCOMLEN + 1);
 121   core_signal (abfd) = core_header.signo;
 122
 123   for (i = 0; i < core_header.nscns; i++)
 124     {
 125       struct core_scnhdr core_scnhdr;
 126       flagword flags;
 127
 128       amt = sizeof core_scnhdr;
 129       val = bfd_bread ((PTR) &core_scnhdr, amt, abfd);
 130       if (val != sizeof core_scnhdr)
 131         break;
 132
 133       /* Skip empty sections.  */
 134       if (core_scnhdr.size == 0 || core_scnhdr.scnptr == 0)
 135         continue;
 136
 137       switch (core_scnhdr.scntype)
 138         {
 139         case SCNRGN:
 140           secname = ".data";
 141           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 142           break;
 143         case SCNSTACK:
 144           secname = ".stack";
 145           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 146           break;
 147         case SCNREGS:
 148           secname = ".reg";
 149           flags = SEC_HAS_CONTENTS;
 150           break;
 151         default:
 152           (*_bfd_error_handler) (_("Unhandled OSF/1 core file section type %d\n"),
 153                                  core_scnhdr.scntype);
 154           continue;
 155         }
 156
 157       if (!make_bfd_asection (abfd, secname, flags,
 158                               (bfd_size_type) core_scnhdr.size,
 159                               (bfd_vma) core_scnhdr.vaddr,
 160                               (file_ptr) core_scnhdr.scnptr))
 161         goto fail;
 162     }
 163
 164   /* OK, we believe you.  You're a core file (sure, sure).  */
 165
 166   return abfd->xvec;
 167
 168  fail:
 169   bfd_release (abfd, core_hdr (abfd));
 170   core_hdr (abfd) = NULL;
 171   bfd_section_list_clear (abfd);
 172   return NULL;
 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 ATTRIBUTE_UNUSED;
 194      bfd *exec_bfd ATTRIBUTE_UNUSED;
 195 {
 196   return true;          /* FIXME, We have no way of telling at this point */
 197 }
 198 \f
 199 #define osf_core_get_symtab_upper_bound _bfd_nosymbols_get_symtab_upper_bound
 200 #define osf_core_get_symtab _bfd_nosymbols_get_symtab
 201 #define osf_core_print_symbol _bfd_nosymbols_print_symbol
 202 #define osf_core_get_symbol_info _bfd_nosymbols_get_symbol_info
 203 #define osf_core_bfd_is_local_label_name _bfd_nosymbols_bfd_is_local_label_name
 204 #define osf_core_get_lineno _bfd_nosymbols_get_lineno
 205 #define osf_core_find_nearest_line _bfd_nosymbols_find_nearest_line
 206 #define osf_core_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
 207 #define osf_core_read_minisymbols _bfd_nosymbols_read_minisymbols
 208 #define osf_core_minisymbol_to_symbol _bfd_nosymbols_minisymbol_to_symbol
 209
 210 /* If somebody calls any byte-swapping routines, shoot them.  */
 211 static void
 212 swap_abort()
 213 {
 214   abort(); /* This way doesn't require any declaration for ANSI to fuck up */
 215 }
 216 #define NO_GET  ((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )
 217 #define NO_PUT  ((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
 218 #define NO_SIGNED_GET \
 219   ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
 220
 221 const bfd_target osf_core_vec =
 222   {
 223     "osf-core",
 224     bfd_target_unknown_flavour,
 225     BFD_ENDIAN_BIG,             /* target byte order */
 226     BFD_ENDIAN_BIG,             /* target headers byte order */
 227     (HAS_RELOC | EXEC_P |       /* object flags */
 228      HAS_LINENO | HAS_DEBUG |
 229      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 230     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 231     0,                                                     /* symbol prefix */
 232     ' ',                                                   /* ar_pad_char */
 233     16,                                                    /* ar_max_namelen */
 234     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit data */
 235     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit data */
 236     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit data */
 237     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit hdrs */
 238     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit hdrs */
 239     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit hdrs */
 240
 241     {                           /* bfd_check_format */
 242      _bfd_dummy_target,         /* unknown format */
 243      _bfd_dummy_target,         /* object file */
 244      _bfd_dummy_target,         /* archive */
 245      osf_core_core_file_p       /* a core file */
 246     },
 247     {                           /* bfd_set_format */
 248      bfd_false, bfd_false,
 249      bfd_false, bfd_false
 250     },
 251     {                           /* bfd_write_contents */
 252      bfd_false, bfd_false,
 253      bfd_false, bfd_false
 254     },
 255
 256        BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 257        BFD_JUMP_TABLE_COPY (_bfd_generic),
 258        BFD_JUMP_TABLE_CORE (osf_core),
 259        BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 260        BFD_JUMP_TABLE_SYMBOLS (osf_core),
 261        BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 262        BFD_JUMP_TABLE_WRITE (_bfd_generic),
 263        BFD_JUMP_TABLE_LINK (_bfd_nolink),
 264        BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 265
 266     NULL,
 267
 268     (PTR) 0                     /* backend_data */
 269 };