bfd/netbsd-core.c

   1 /* BFD back end for NetBSD style core files
   2    Copyright 1988, 1989, 1991, 1992, 1993, 1996, 1998, 1999, 2000, 2001,
   3    2002, 2003, 2004
   4    Free Software Foundation, Inc.
   5    Written by Paul Kranenburg, EUR
   6
   7    This file is part of BFD, the Binary File Descriptor library.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  22
  23 #include "bfd.h"
  24 #include "sysdep.h"
  25 #include "libbfd.h"
  26 #include "libaout.h"           /* BFD a.out internal data structures.  */
  27
  28 #include <sys/param.h>
  29 #include <sys/dir.h>
  30 #include <signal.h>
  31 #include <sys/core.h>
  32
  33 /* The machine ID for OpenBSD/sparc64 and older versions of
  34    NetBSD/sparc64 overlaps with M_MIPS1.  */
  35 #define M_SPARC64_OPENBSD       M_MIPS1
  36
  37 /* Offset of StackGhost cookie within `struct md_coredump' on
  38    OpenBSD/sparc.  */
  39 #define CORE_WCOOKIE_OFFSET     344
  40
  41 struct netbsd_core_struct
  42 {
  43   struct core core;
  44 } *rawptr;
  45
  46 /* Forward declarations.  */
  47
  48 static const bfd_target *netbsd_core_file_p
  49   PARAMS ((bfd *abfd));
  50 static char *netbsd_core_file_failing_command
  51   PARAMS ((bfd *abfd));
  52 static int netbsd_core_file_failing_signal
  53   PARAMS ((bfd *abfd));
  54 static bfd_boolean netbsd_core_file_matches_executable_p
  55   PARAMS ((bfd *core_bfd, bfd *exec_bfd));
  56 static void swap_abort
  57   PARAMS ((void));
  58
  59 /* Handle NetBSD-style core dump file.  */
  60
  61 static const bfd_target *
  62 netbsd_core_file_p (abfd)
  63      bfd *abfd;
  64
  65 {
  66   int i, val;
  67   file_ptr offset;
  68   asection *asect;
  69   struct core core;
  70   struct coreseg coreseg;
  71   bfd_size_type amt = sizeof core;
  72
  73   val = bfd_bread ((void *) &core, amt, abfd);
  74   if (val != sizeof core)
  75     {
  76       /* Too small to be a core file.  */
  77       bfd_set_error (bfd_error_wrong_format);
  78       return 0;
  79     }
  80
  81   if (CORE_GETMAGIC (core) != COREMAGIC)
  82     {
  83       bfd_set_error (bfd_error_wrong_format);
  84       return 0;
  85     }
  86
  87   amt = sizeof (struct netbsd_core_struct);
  88   rawptr = (struct netbsd_core_struct *) bfd_zalloc (abfd, amt);
  89   if (rawptr == NULL)
  90     return 0;
  91
  92   rawptr->core = core;
  93   abfd->tdata.netbsd_core_data = rawptr;
  94
  95   offset = core.c_hdrsize;
  96   for (i = 0; i < core.c_nseg; i++)
  97     {
  98       const char *sname;
  99       flagword flags;
 100
 101       if (bfd_seek (abfd, offset, SEEK_SET) != 0)
 102         goto punt;
 103
 104       val = bfd_bread ((void *) &coreseg, (bfd_size_type) sizeof coreseg, abfd);
 105       if (val != sizeof coreseg)
 106         {
 107           bfd_set_error (bfd_error_file_truncated);
 108           goto punt;
 109         }
 110       if (CORE_GETMAGIC (coreseg) != CORESEGMAGIC)
 111         {
 112           bfd_set_error (bfd_error_wrong_format);
 113           goto punt;
 114         }
 115
 116       offset += core.c_seghdrsize;
 117
 118       switch (CORE_GETFLAG (coreseg))
 119         {
 120         case CORE_CPU:
 121           sname = ".reg";
 122           flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 123           break;
 124         case CORE_DATA:
 125           sname = ".data";
 126           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 127           break;
 128         case CORE_STACK:
 129           sname = ".stack";
 130           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 131           break;
 132         default:
 133           sname = ".unknown";
 134           flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 135           break;
 136         }
 137       asect = bfd_make_section_anyway (abfd, sname);
 138       if (asect == NULL)
 139         goto punt;
 140
 141       asect->flags = flags;
 142       asect->_raw_size = coreseg.c_size;
 143       asect->vma = coreseg.c_addr;
 144       asect->filepos = offset;
 145       asect->alignment_power = 2;
 146
 147       if (CORE_GETMID (core) == M_SPARC_NETBSD
 148           && CORE_GETFLAG (coreseg) == CORE_CPU
 149           && coreseg.c_size > CORE_WCOOKIE_OFFSET)
 150         {
 151           /* Truncate the .reg section.  */
 152           asect->_raw_size = CORE_WCOOKIE_OFFSET;
 153
 154           /* And create the .wcookie section.  */
 155           asect = bfd_make_section_anyway (abfd, ".wcookie");
 156           if (asect == NULL)
 157             goto punt;
 158
 159           asect->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 160           asect->_raw_size = 4;
 161           asect->vma = 0;
 162           asect->filepos = offset + CORE_WCOOKIE_OFFSET;
 163           asect->alignment_power = 2;
 164         }
 165
 166       offset += coreseg.c_size;
 167     }
 168
 169  /* Set architecture from machine ID.  */
 170  switch (CORE_GETMID (core))
 171    {
 172    case M_X86_64_NETBSD:
 173      bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
 174      break;
 175
 176    case M_386_NETBSD:
 177      bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386);
 178      break;
 179
 180    case M_POWERPC_NETBSD:
 181      bfd_default_set_arch_mach (abfd, bfd_arch_powerpc, bfd_mach_ppc);
 182      break;
 183
 184    case M_SPARC_NETBSD:
 185      bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc);
 186      break;
 187
 188    case M_SPARC64_NETBSD:
 189    case M_SPARC64_OPENBSD:
 190      bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc_v9);
 191      break;
 192
 193    case M_VAX_NETBSD:
 194    case M_VAX4K_NETBSD:
 195      bfd_default_set_arch_mach (abfd, bfd_arch_vax, 0);
 196      break;
 197    }
 198
 199   /* OK, we believe you.  You're a core file (sure, sure).  */
 200   return abfd->xvec;
 201
 202  punt:
 203   bfd_release (abfd, abfd->tdata.any);
 204   abfd->tdata.any = NULL;
 205   bfd_section_list_clear (abfd);
 206   return 0;
 207 }
 208
 209 static char*
 210 netbsd_core_file_failing_command (abfd)
 211         bfd *abfd;
 212 {
 213  /*return core_command (abfd);*/
 214   return abfd->tdata.netbsd_core_data->core.c_name;
 215 }
 216
 217 static int
 218 netbsd_core_file_failing_signal (abfd)
 219         bfd *abfd;
 220 {
 221   /*return core_signal (abfd);*/
 222   return abfd->tdata.netbsd_core_data->core.c_signo;
 223 }
 224
 225 static bfd_boolean
 226 netbsd_core_file_matches_executable_p  (core_bfd, exec_bfd)
 227      bfd *core_bfd ATTRIBUTE_UNUSED;
 228      bfd *exec_bfd ATTRIBUTE_UNUSED;
 229 {
 230   /* FIXME, We have no way of telling at this point.  */
 231   return TRUE;
 232 }
 233 \f
 234 /* If somebody calls any byte-swapping routines, shoot them.  */
 235
 236 static void
 237 swap_abort ()
 238 {
 239  /* This way doesn't require any declaration for ANSI to fuck up.  */
 240   abort ();
 241 }
 242
 243 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
 244 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
 245 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
 246 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
 247 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
 248 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
 249
 250 const bfd_target netbsd_core_vec =
 251   {
 252     "netbsd-core",
 253     bfd_target_unknown_flavour,
 254     BFD_ENDIAN_UNKNOWN,         /* Target byte order.  */
 255     BFD_ENDIAN_UNKNOWN,         /* Target headers byte order.  */
 256     (HAS_RELOC | EXEC_P |       /* Object flags.  */
 257      HAS_LINENO | HAS_DEBUG |
 258      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 259     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* Section flags.  */
 260     0,                                                     /* Symbol prefix.  */
 261     ' ',                                                   /* ar_pad_char.  */
 262     16,                                                    /* ar_max_namelen.  */
 263     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit data.  */
 264     NO_GET, NO_GETS, NO_PUT,            /* 32 bit data.  */
 265     NO_GET, NO_GETS, NO_PUT,            /* 16 bit data.  */
 266     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit hdrs.  */
 267     NO_GET, NO_GETS, NO_PUT,            /* 32 bit hdrs.  */
 268     NO_GET, NO_GETS, NO_PUT,            /* 16 bit hdrs.  */
 269
 270     {                                   /* bfd_check_format.  */
 271       _bfd_dummy_target,                /* Unknown format.  */
 272       _bfd_dummy_target,                /* Object file.  */
 273       _bfd_dummy_target,                /* Archive.  */
 274       netbsd_core_file_p                /* A core file.  */
 275     },
 276     {                                   /* bfd_set_format.  */
 277       bfd_false, bfd_false,
 278       bfd_false, bfd_false
 279     },
 280     {                                   /* bfd_write_contents.  */
 281       bfd_false, bfd_false,
 282       bfd_false, bfd_false
 283     },
 284
 285     BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 286     BFD_JUMP_TABLE_COPY (_bfd_generic),
 287     BFD_JUMP_TABLE_CORE (netbsd),
 288     BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 289     BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 290     BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 291     BFD_JUMP_TABLE_WRITE (_bfd_generic),
 292     BFD_JUMP_TABLE_LINK (_bfd_nolink),
 293     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 294
 295     NULL,
 296
 297     (PTR) 0                             /* Backend_data.  */
 298   };