bfd/osf-core.c

   1 /* BFD back-end for OSF/1 core files.
   2    Copyright 1993, 1994 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 /* This file can only be compiled on systems which use OSF/1 style
  21    core files.  */
  22
  23 #include "bfd.h"
  24 #include "sysdep.h"
  25 #include "libbfd.h"
  26
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <sys/user.h>
  30 #include <sys/core.h>
  31
  32 /* forward declarations */
  33
  34 static asection *
  35 make_bfd_asection PARAMS ((bfd *, CONST char *, flagword, bfd_size_type,
  36                            bfd_vma, file_ptr));
  37 static asymbol *
  38 osf_core_make_empty_symbol PARAMS ((bfd *));
  39 static const bfd_target *
  40 osf_core_core_file_p PARAMS ((bfd *));
  41 static char *
  42 osf_core_core_file_failing_command PARAMS ((bfd *));
  43 static int
  44 osf_core_core_file_failing_signal PARAMS ((bfd *));
  45 static boolean
  46 osf_core_core_file_matches_executable_p PARAMS ((bfd *, bfd *));
  47 static void
  48 swap_abort PARAMS ((void));
  49
  50 /* These are stored in the bfd's tdata */
  51
  52 struct osf_core_struct
  53 {
  54   int sig;
  55   char cmd[MAXCOMLEN + 1];
  56 };
  57
  58 #define core_hdr(bfd) ((bfd)->tdata.osf_core_data)
  59 #define core_signal(bfd) (core_hdr(bfd)->sig)
  60 #define core_command(bfd) (core_hdr(bfd)->cmd)
  61
  62 static asection *
  63 make_bfd_asection (abfd, name, flags, _raw_size, vma, filepos)
  64      bfd *abfd;
  65      CONST char *name;
  66      flagword flags;
  67      bfd_size_type _raw_size;
  68      bfd_vma vma;
  69      file_ptr filepos;
  70 {
  71   asection *asect;
  72
  73   asect = bfd_make_section_anyway (abfd, name);
  74   if (!asect)
  75     return NULL;
  76
  77   asect->flags = flags;
  78   asect->_raw_size = _raw_size;
  79   asect->vma = vma;
  80   asect->filepos = filepos;
  81   asect->alignment_power = 8;
  82
  83   return asect;
  84 }
  85
  86 static asymbol *
  87 osf_core_make_empty_symbol (abfd)
  88      bfd *abfd;
  89 {
  90   asymbol *new = (asymbol *) bfd_zalloc (abfd, sizeof (asymbol));
  91   if (new)
  92     new->the_bfd = abfd;
  93   return new;
  94 }
  95
  96 static const bfd_target *
  97 osf_core_core_file_p (abfd)
  98      bfd *abfd;
  99 {
 100   int val;
 101   int i;
 102   char *secname;
 103   struct core_filehdr core_header;
 104
 105   val = bfd_read ((PTR)&core_header, 1, sizeof core_header, abfd);
 106   if (val != sizeof core_header)
 107     return NULL;
 108
 109   if (strncmp (core_header.magic, "Core", 4) != 0)
 110     return NULL;
 111
 112   core_hdr (abfd) = (struct osf_core_struct *)
 113     bfd_zalloc (abfd, sizeof (struct osf_core_struct));
 114   if (!core_hdr (abfd))
 115     return NULL;
 116
 117   strncpy (core_command (abfd), core_header.name, MAXCOMLEN + 1);
 118   core_signal (abfd) = core_header.signo;
 119
 120   for (i = 0; i < core_header.nscns; i++)
 121     {
 122       struct core_scnhdr core_scnhdr;
 123       flagword flags;
 124
 125       val = bfd_read ((PTR)&core_scnhdr, 1, sizeof core_scnhdr, abfd);
 126       if (val != sizeof core_scnhdr)
 127         break;
 128
 129       /* Skip empty sections.  */
 130       if (core_scnhdr.size == 0 || core_scnhdr.scnptr == 0)
 131         continue;
 132
 133       switch (core_scnhdr.scntype)
 134         {
 135         case SCNRGN:
 136           secname = ".data";
 137           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 138           break;
 139         case SCNSTACK:
 140           secname = ".stack";
 141           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 142           break;
 143         case SCNREGS:
 144           secname = ".reg";
 145           flags = SEC_HAS_CONTENTS;
 146           break;
 147         default:
 148           fprintf (stderr, "Unhandled OSF/1 core file section type %d\n",
 149                    core_scnhdr.scntype);
 150           continue;
 151         }
 152
 153       if (!make_bfd_asection (abfd, secname, flags,
 154                               (bfd_size_type) core_scnhdr.size,
 155                               (bfd_vma) core_scnhdr.vaddr,
 156                               (file_ptr) core_scnhdr.scnptr))
 157         return NULL;
 158     }
 159
 160   /* OK, we believe you.  You're a core file (sure, sure).  */
 161
 162   return abfd->xvec;
 163 }
 164
 165 static char *
 166 osf_core_core_file_failing_command (abfd)
 167      bfd *abfd;
 168 {
 169   return core_command (abfd);
 170 }
 171
 172 /* ARGSUSED */
 173 static int
 174 osf_core_core_file_failing_signal (abfd)
 175      bfd *abfd;
 176 {
 177   return core_signal (abfd);
 178 }
 179
 180 /* ARGSUSED */
 181 static boolean
 182 osf_core_core_file_matches_executable_p (core_bfd, exec_bfd)
 183      bfd *core_bfd, *exec_bfd;
 184 {
 185   return true;          /* FIXME, We have no way of telling at this point */
 186 }
 187 \f
 188 #define osf_core_get_symtab_upper_bound _bfd_nosymbols_get_symtab_upper_bound
 189 #define osf_core_get_symtab _bfd_nosymbols_get_symtab
 190 #define osf_core_print_symbol _bfd_nosymbols_print_symbol
 191 #define osf_core_get_symbol_info _bfd_nosymbols_get_symbol_info
 192 #define osf_core_bfd_is_local_label _bfd_nosymbols_bfd_is_local_label
 193 #define osf_core_get_lineno _bfd_nosymbols_get_lineno
 194 #define osf_core_find_nearest_line _bfd_nosymbols_find_nearest_line
 195 #define osf_core_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
 196 #define osf_core_read_minisymbols _bfd_nosymbols_read_minisymbols
 197 #define osf_core_minisymbol_to_symbol _bfd_nosymbols_minisymbol_to_symbol
 198
 199 /* If somebody calls any byte-swapping routines, shoot them.  */
 200 static void
 201 swap_abort()
 202 {
 203   abort(); /* This way doesn't require any declaration for ANSI to fuck up */
 204 }
 205 #define NO_GET  ((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )
 206 #define NO_PUT  ((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
 207 #define NO_SIGNED_GET \
 208   ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
 209
 210 const bfd_target osf_core_vec =
 211   {
 212     "osf-core",
 213     bfd_target_unknown_flavour,
 214     true,                       /* target byte order */
 215     true,                       /* target headers byte order */
 216     (HAS_RELOC | EXEC_P |       /* object flags */
 217      HAS_LINENO | HAS_DEBUG |
 218      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 219     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 220     0,                                                     /* symbol prefix */
 221     ' ',                                                   /* ar_pad_char */
 222     16,                                                    /* ar_max_namelen */
 223     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit data */
 224     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit data */
 225     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit data */
 226     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit hdrs */
 227     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit hdrs */
 228     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit hdrs */
 229
 230     {                           /* bfd_check_format */
 231      _bfd_dummy_target,         /* unknown format */
 232      _bfd_dummy_target,         /* object file */
 233      _bfd_dummy_target,         /* archive */
 234      osf_core_core_file_p       /* a core file */
 235     },
 236     {                           /* bfd_set_format */
 237      bfd_false, bfd_false,
 238      bfd_false, bfd_false
 239     },
 240     {                           /* bfd_write_contents */
 241      bfd_false, bfd_false,
 242      bfd_false, bfd_false
 243     },
 244
 245        BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 246        BFD_JUMP_TABLE_COPY (_bfd_generic),
 247        BFD_JUMP_TABLE_CORE (osf_core),
 248        BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 249        BFD_JUMP_TABLE_SYMBOLS (osf_core),
 250        BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 251        BFD_JUMP_TABLE_WRITE (_bfd_generic),
 252        BFD_JUMP_TABLE_LINK (_bfd_nolink),
 253        BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 254
 255     (PTR) 0                     /* backend_data */
 256 };