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, 2005
   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 SPARC_WCOOKIE_OFFSET    344
  40
  41 /* Offset of StackGhost cookie within `struct md_coredump' on
  42    OpenBSD/sparc64.  */
  43 #define SPARC64_WCOOKIE_OFFSET  832
  44
  45 struct netbsd_core_struct
  46 {
  47   struct core core;
  48 } *rawptr;
  49
  50 /* Handle NetBSD-style core dump file.  */
  51
  52 static const bfd_target *
  53 netbsd_core_file_p (bfd *abfd)
  54 {
  55   int val;
  56   unsigned i;
  57   file_ptr offset;
  58   asection *asect;
  59   struct core core;
  60   struct coreseg coreseg;
  61   bfd_size_type amt = sizeof core;
  62
  63   val = bfd_bread (&core, amt, abfd);
  64   if (val != sizeof core)
  65     {
  66       /* Too small to be a core file.  */
  67       bfd_set_error (bfd_error_wrong_format);
  68       return 0;
  69     }
  70
  71   if (CORE_GETMAGIC (core) != COREMAGIC)
  72     {
  73       bfd_set_error (bfd_error_wrong_format);
  74       return 0;
  75     }
  76
  77   amt = sizeof (struct netbsd_core_struct);
  78   rawptr = (struct netbsd_core_struct *) bfd_zalloc (abfd, amt);
  79   if (rawptr == NULL)
  80     return 0;
  81
  82   rawptr->core = core;
  83   abfd->tdata.netbsd_core_data = rawptr;
  84
  85   offset = core.c_hdrsize;
  86   for (i = 0; i < core.c_nseg; i++)
  87     {
  88       const char *sname;
  89       flagword flags;
  90
  91       if (bfd_seek (abfd, offset, SEEK_SET) != 0)
  92         goto punt;
  93
  94       val = bfd_bread (&coreseg, sizeof coreseg, abfd);
  95       if (val != sizeof coreseg)
  96         {
  97           bfd_set_error (bfd_error_file_truncated);
  98           goto punt;
  99         }
 100       if (CORE_GETMAGIC (coreseg) != CORESEGMAGIC)
 101         {
 102           bfd_set_error (bfd_error_wrong_format);
 103           goto punt;
 104         }
 105
 106       offset += core.c_seghdrsize;
 107
 108       switch (CORE_GETFLAG (coreseg))
 109         {
 110         case CORE_CPU:
 111           sname = ".reg";
 112           flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 113           break;
 114         case CORE_DATA:
 115           sname = ".data";
 116           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 117           break;
 118         case CORE_STACK:
 119           sname = ".stack";
 120           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 121           break;
 122         default:
 123           sname = ".unknown";
 124           flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 125           break;
 126         }
 127       asect = bfd_make_section_anyway (abfd, sname);
 128       if (asect == NULL)
 129         goto punt;
 130
 131       asect->flags = flags;
 132       asect->size = coreseg.c_size;
 133       asect->vma = coreseg.c_addr;
 134       asect->filepos = offset;
 135       asect->alignment_power = 2;
 136
 137       if (CORE_GETFLAG (coreseg) == CORE_CPU)
 138         {
 139           bfd_size_type wcookie_offset;
 140
 141           switch (CORE_GETMID (core))
 142             {
 143             case M_SPARC_NETBSD:
 144               wcookie_offset = SPARC_WCOOKIE_OFFSET;
 145               break;
 146             case M_SPARC64_OPENBSD:
 147               wcookie_offset = SPARC64_WCOOKIE_OFFSET;
 148               break;
 149             default:
 150               wcookie_offset = 0;
 151               break;
 152             }
 153
 154           if (wcookie_offset > 0 && coreseg.c_size > wcookie_offset)
 155             {
 156               /* Truncate the .reg section.  */
 157               asect->size = wcookie_offset;
 158
 159               /* And create the .wcookie section.  */
 160               asect = bfd_make_section_anyway (abfd, ".wcookie");
 161               if (asect == NULL)
 162                 goto punt;
 163
 164               asect->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 165               asect->size = coreseg.c_size - wcookie_offset;
 166               asect->vma = 0;
 167               asect->filepos = offset + wcookie_offset;
 168               asect->alignment_power = 2;
 169             }
 170         }
 171
 172       offset += coreseg.c_size;
 173     }
 174
 175   /* Set architecture from machine ID.  */
 176   switch (CORE_GETMID (core))
 177     {
 178     case M_ALPHA_NETBSD:
 179       bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0);
 180       break;
 181
 182     case M_ARM6_NETBSD:
 183       bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_3);
 184       break;
 185
 186     case M_X86_64_NETBSD:
 187       bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
 188       break;
 189
 190     case M_386_NETBSD:
 191       bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386);
 192       break;
 193
 194     case M_68K_NETBSD:
 195     case M_68K4K_NETBSD:
 196       bfd_default_set_arch_mach (abfd, bfd_arch_m68k, 0);
 197       break;
 198
 199     case M_88K_OPENBSD:
 200       bfd_default_set_arch_mach (abfd, bfd_arch_m88k, 0);
 201       break;
 202
 203     case M_HPPA_OPENBSD:
 204       bfd_default_set_arch_mach (abfd, bfd_arch_hppa, bfd_mach_hppa11);
 205       break;
 206
 207     case M_POWERPC_NETBSD:
 208       bfd_default_set_arch_mach (abfd, bfd_arch_powerpc, bfd_mach_ppc);
 209       break;
 210
 211     case M_SPARC_NETBSD:
 212       bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc);
 213       break;
 214
 215     case M_SPARC64_NETBSD:
 216     case M_SPARC64_OPENBSD:
 217       bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc_v9);
 218       break;
 219
 220     case M_VAX_NETBSD:
 221     case M_VAX4K_NETBSD:
 222       bfd_default_set_arch_mach (abfd, bfd_arch_vax, 0);
 223       break;
 224     }
 225
 226   /* OK, we believe you.  You're a core file (sure, sure).  */
 227   return abfd->xvec;
 228
 229  punt:
 230   bfd_release (abfd, abfd->tdata.any);
 231   abfd->tdata.any = NULL;
 232   bfd_section_list_clear (abfd);
 233   return 0;
 234 }
 235
 236 static char*
 237 netbsd_core_file_failing_command (bfd *abfd)
 238 {
 239   /*return core_command (abfd);*/
 240   return abfd->tdata.netbsd_core_data->core.c_name;
 241 }
 242
 243 static int
 244 netbsd_core_file_failing_signal (bfd *abfd)
 245 {
 246   /*return core_signal (abfd);*/
 247   return abfd->tdata.netbsd_core_data->core.c_signo;
 248 }
 249
 250 static bfd_boolean
 251 netbsd_core_file_matches_executable_p  (bfd *core_bfd ATTRIBUTE_UNUSED,
 252                                         bfd *exec_bfd ATTRIBUTE_UNUSED)
 253 {
 254   /* FIXME, We have no way of telling at this point.  */
 255   return TRUE;
 256 }
 257 \f
 258 /* If somebody calls any byte-swapping routines, shoot them.  */
 259
 260 static void
 261 swap_abort (void)
 262 {
 263  /* This way doesn't require any declaration for ANSI to fuck up.  */
 264   abort ();
 265 }
 266
 267 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
 268 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
 269 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
 270 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
 271 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
 272 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
 273
 274 const bfd_target netbsd_core_vec =
 275   {
 276     "netbsd-core",
 277     bfd_target_unknown_flavour,
 278     BFD_ENDIAN_UNKNOWN,         /* Target byte order.  */
 279     BFD_ENDIAN_UNKNOWN,         /* Target headers byte order.  */
 280     (HAS_RELOC | EXEC_P |       /* Object flags.  */
 281      HAS_LINENO | HAS_DEBUG |
 282      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 283     (SEC_HAS_CONTENTS |         /* Section flags.  */
 284      SEC_ALLOC | SEC_LOAD | SEC_RELOC),
 285     0,                          /* Symbol prefix.  */
 286     ' ',                        /* ar_pad_char.  */
 287     16,                         /* ar_max_namelen.  */
 288     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit data.  */
 289     NO_GET, NO_GETS, NO_PUT,            /* 32 bit data.  */
 290     NO_GET, NO_GETS, NO_PUT,            /* 16 bit data.  */
 291     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit hdrs.  */
 292     NO_GET, NO_GETS, NO_PUT,            /* 32 bit hdrs.  */
 293     NO_GET, NO_GETS, NO_PUT,            /* 16 bit hdrs.  */
 294
 295     {                                   /* bfd_check_format.  */
 296       _bfd_dummy_target,                /* Unknown format.  */
 297       _bfd_dummy_target,                /* Object file.  */
 298       _bfd_dummy_target,                /* Archive.  */
 299       netbsd_core_file_p                /* A core file.  */
 300     },
 301     {                                   /* bfd_set_format.  */
 302       bfd_false, bfd_false,
 303       bfd_false, bfd_false
 304     },
 305     {                                   /* bfd_write_contents.  */
 306       bfd_false, bfd_false,
 307       bfd_false, bfd_false
 308     },
 309
 310     BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 311     BFD_JUMP_TABLE_COPY (_bfd_generic),
 312     BFD_JUMP_TABLE_CORE (netbsd),
 313     BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 314     BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 315     BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 316     BFD_JUMP_TABLE_WRITE (_bfd_generic),
 317     BFD_JUMP_TABLE_LINK (_bfd_nolink),
 318     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 319
 320     NULL,
 321
 322     (PTR) 0                             /* Backend_data.  */
 323   };