bfd/osf-core.c

   1 /* BFD back-end for OSF/1 core files.
   2    Copyright 1993, 94, 95, 97, 1998 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 <sys/user.h>
  28 #include <sys/core.h>
  29
  30 /* forward declarations */
  31
  32 static asection *
  33 make_bfd_asection PARAMS ((bfd *, CONST char *, flagword, bfd_size_type,
  34                            bfd_vma, file_ptr));
  35 static asymbol *
  36 osf_core_make_empty_symbol PARAMS ((bfd *));
  37 static const bfd_target *
  38 osf_core_core_file_p PARAMS ((bfd *));
  39 static char *
  40 osf_core_core_file_failing_command PARAMS ((bfd *));
  41 static int
  42 osf_core_core_file_failing_signal PARAMS ((bfd *));
  43 static boolean
  44 osf_core_core_file_matches_executable_p PARAMS ((bfd *, bfd *));
  45 static void
  46 swap_abort PARAMS ((void));
  47
  48 /* These are stored in the bfd's tdata */
  49
  50 struct osf_core_struct
  51 {
  52   int sig;
  53   char cmd[MAXCOMLEN + 1];
  54 };
  55
  56 #define core_hdr(bfd) ((bfd)->tdata.osf_core_data)
  57 #define core_signal(bfd) (core_hdr(bfd)->sig)
  58 #define core_command(bfd) (core_hdr(bfd)->cmd)
  59
  60 static asection *
  61 make_bfd_asection (abfd, name, flags, _raw_size, vma, filepos)
  62      bfd *abfd;
  63      CONST char *name;
  64      flagword flags;
  65      bfd_size_type _raw_size;
  66      bfd_vma vma;
  67      file_ptr filepos;
  68 {
  69   asection *asect;
  70
  71   asect = bfd_make_section_anyway (abfd, name);
  72   if (!asect)
  73     return NULL;
  74
  75   asect->flags = flags;
  76   asect->_raw_size = _raw_size;
  77   asect->vma = vma;
  78   asect->filepos = filepos;
  79   asect->alignment_power = 8;
  80
  81   return asect;
  82 }
  83
  84 static asymbol *
  85 osf_core_make_empty_symbol (abfd)
  86      bfd *abfd;
  87 {
  88   asymbol *new = (asymbol *) bfd_zalloc (abfd, sizeof (asymbol));
  89   if (new)
  90     new->the_bfd = abfd;
  91   return new;
  92 }
  93
  94 static const bfd_target *
  95 osf_core_core_file_p (abfd)
  96      bfd *abfd;
  97 {
  98   int val;
  99   int i;
 100   char *secname;
 101   struct core_filehdr core_header;
 102
 103   val = bfd_read ((PTR)&core_header, 1, sizeof core_header, abfd);
 104   if (val != sizeof core_header)
 105     return NULL;
 106
 107   if (strncmp (core_header.magic, "Core", 4) != 0)
 108     return NULL;
 109
 110   core_hdr (abfd) = (struct osf_core_struct *)
 111     bfd_zalloc (abfd, sizeof (struct osf_core_struct));
 112   if (!core_hdr (abfd))
 113     return NULL;
 114
 115   strncpy (core_command (abfd), core_header.name, MAXCOMLEN + 1);
 116   core_signal (abfd) = core_header.signo;
 117
 118   for (i = 0; i < core_header.nscns; i++)
 119     {
 120       struct core_scnhdr core_scnhdr;
 121       flagword flags;
 122
 123       val = bfd_read ((PTR)&core_scnhdr, 1, sizeof core_scnhdr, abfd);
 124       if (val != sizeof core_scnhdr)
 125         break;
 126
 127       /* Skip empty sections.  */
 128       if (core_scnhdr.size == 0 || core_scnhdr.scnptr == 0)
 129         continue;
 130
 131       switch (core_scnhdr.scntype)
 132         {
 133         case SCNRGN:
 134           secname = ".data";
 135           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 136           break;
 137         case SCNSTACK:
 138           secname = ".stack";
 139           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 140           break;
 141         case SCNREGS:
 142           secname = ".reg";
 143           flags = SEC_HAS_CONTENTS;
 144           break;
 145         default:
 146           (*_bfd_error_handler) (_("Unhandled OSF/1 core file section type %d\n"),
 147                                  core_scnhdr.scntype);
 148           continue;
 149         }
 150
 151       if (!make_bfd_asection (abfd, secname, flags,
 152                               (bfd_size_type) core_scnhdr.size,
 153                               (bfd_vma) core_scnhdr.vaddr,
 154                               (file_ptr) core_scnhdr.scnptr))
 155         return NULL;
 156     }
 157
 158   /* OK, we believe you.  You're a core file (sure, sure).  */
 159
 160   return abfd->xvec;
 161 }
 162
 163 static char *
 164 osf_core_core_file_failing_command (abfd)
 165      bfd *abfd;
 166 {
 167   return core_command (abfd);
 168 }
 169
 170 /* ARGSUSED */
 171 static int
 172 osf_core_core_file_failing_signal (abfd)
 173      bfd *abfd;
 174 {
 175   return core_signal (abfd);
 176 }
 177
 178 /* ARGSUSED */
 179 static boolean
 180 osf_core_core_file_matches_executable_p (core_bfd, exec_bfd)
 181      bfd *core_bfd, *exec_bfd;
 182 {
 183   return true;          /* FIXME, We have no way of telling at this point */
 184 }
 185 \f
 186 #define osf_core_get_symtab_upper_bound _bfd_nosymbols_get_symtab_upper_bound
 187 #define osf_core_get_symtab _bfd_nosymbols_get_symtab
 188 #define osf_core_print_symbol _bfd_nosymbols_print_symbol
 189 #define osf_core_get_symbol_info _bfd_nosymbols_get_symbol_info
 190 #define osf_core_bfd_is_local_label_name _bfd_nosymbols_bfd_is_local_label_name
 191 #define osf_core_get_lineno _bfd_nosymbols_get_lineno
 192 #define osf_core_find_nearest_line _bfd_nosymbols_find_nearest_line
 193 #define osf_core_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
 194 #define osf_core_read_minisymbols _bfd_nosymbols_read_minisymbols
 195 #define osf_core_minisymbol_to_symbol _bfd_nosymbols_minisymbol_to_symbol
 196
 197 /* If somebody calls any byte-swapping routines, shoot them.  */
 198 static void
 199 swap_abort()
 200 {
 201   abort(); /* This way doesn't require any declaration for ANSI to fuck up */
 202 }
 203 #define NO_GET  ((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )
 204 #define NO_PUT  ((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
 205 #define NO_SIGNED_GET \
 206   ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
 207
 208 const bfd_target osf_core_vec =
 209   {
 210     "osf-core",
 211     bfd_target_unknown_flavour,
 212     BFD_ENDIAN_BIG,             /* target byte order */
 213     BFD_ENDIAN_BIG,             /* target headers byte order */
 214     (HAS_RELOC | EXEC_P |       /* object flags */
 215      HAS_LINENO | HAS_DEBUG |
 216      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 217     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 218     0,                                                     /* symbol prefix */
 219     ' ',                                                   /* ar_pad_char */
 220     16,                                                    /* ar_max_namelen */
 221     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit data */
 222     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit data */
 223     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit data */
 224     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit hdrs */
 225     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit hdrs */
 226     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit hdrs */
 227
 228     {                           /* bfd_check_format */
 229      _bfd_dummy_target,         /* unknown format */
 230      _bfd_dummy_target,         /* object file */
 231      _bfd_dummy_target,         /* archive */
 232      osf_core_core_file_p       /* a core file */
 233     },
 234     {                           /* bfd_set_format */
 235      bfd_false, bfd_false,
 236      bfd_false, bfd_false
 237     },
 238     {                           /* bfd_write_contents */
 239      bfd_false, bfd_false,
 240      bfd_false, bfd_false
 241     },
 242
 243        BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 244        BFD_JUMP_TABLE_COPY (_bfd_generic),
 245        BFD_JUMP_TABLE_CORE (osf_core),
 246        BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 247        BFD_JUMP_TABLE_SYMBOLS (osf_core),
 248        BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 249        BFD_JUMP_TABLE_WRITE (_bfd_generic),
 250        BFD_JUMP_TABLE_LINK (_bfd_nolink),
 251        BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 252
 253     NULL,
 254
 255     (PTR) 0                     /* backend_data */
 256 };