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 val;
  67   unsigned i;
  68   file_ptr offset;
  69   asection *asect;
  70   struct core core;
  71   struct coreseg coreseg;
  72   bfd_size_type amt = sizeof core;
  73
  74   val = bfd_bread ((void *) &core, amt, abfd);
  75   if (val != sizeof core)
  76     {
  77       /* Too small to be a core file.  */
  78       bfd_set_error (bfd_error_wrong_format);
  79       return 0;
  80     }
  81
  82   if (CORE_GETMAGIC (core) != COREMAGIC)
  83     {
  84       bfd_set_error (bfd_error_wrong_format);
  85       return 0;
  86     }
  87
  88   amt = sizeof (struct netbsd_core_struct);
  89   rawptr = (struct netbsd_core_struct *) bfd_zalloc (abfd, amt);
  90   if (rawptr == NULL)
  91     return 0;
  92
  93   rawptr->core = core;
  94   abfd->tdata.netbsd_core_data = rawptr;
  95
  96   offset = core.c_hdrsize;
  97   for (i = 0; i < core.c_nseg; i++)
  98     {
  99       const char *sname;
 100       flagword flags;
 101
 102       if (bfd_seek (abfd, offset, SEEK_SET) != 0)
 103         goto punt;
 104
 105       val = bfd_bread ((void *) &coreseg, (bfd_size_type) sizeof coreseg, abfd);
 106       if (val != sizeof coreseg)
 107         {
 108           bfd_set_error (bfd_error_file_truncated);
 109           goto punt;
 110         }
 111       if (CORE_GETMAGIC (coreseg) != CORESEGMAGIC)
 112         {
 113           bfd_set_error (bfd_error_wrong_format);
 114           goto punt;
 115         }
 116
 117       offset += core.c_seghdrsize;
 118
 119       switch (CORE_GETFLAG (coreseg))
 120         {
 121         case CORE_CPU:
 122           sname = ".reg";
 123           flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 124           break;
 125         case CORE_DATA:
 126           sname = ".data";
 127           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 128           break;
 129         case CORE_STACK:
 130           sname = ".stack";
 131           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 132           break;
 133         default:
 134           sname = ".unknown";
 135           flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 136           break;
 137         }
 138       asect = bfd_make_section_anyway (abfd, sname);
 139       if (asect == NULL)
 140         goto punt;
 141
 142       asect->flags = flags;
 143       asect->size = coreseg.c_size;
 144       asect->vma = coreseg.c_addr;
 145       asect->filepos = offset;
 146       asect->alignment_power = 2;
 147
 148       if (CORE_GETMID (core) == M_SPARC_NETBSD
 149           && CORE_GETFLAG (coreseg) == CORE_CPU
 150           && coreseg.c_size > CORE_WCOOKIE_OFFSET)
 151         {
 152           /* Truncate the .reg section.  */
 153           asect->size = CORE_WCOOKIE_OFFSET;
 154
 155           /* And create the .wcookie section.  */
 156           asect = bfd_make_section_anyway (abfd, ".wcookie");
 157           if (asect == NULL)
 158             goto punt;
 159
 160           asect->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 161           asect->size = 4;
 162           asect->vma = 0;
 163           asect->filepos = offset + CORE_WCOOKIE_OFFSET;
 164           asect->alignment_power = 2;
 165         }
 166
 167       offset += coreseg.c_size;
 168     }
 169
 170   /* Set architecture from machine ID.  */
 171   switch (CORE_GETMID (core))
 172     {
 173     case M_ALPHA_NETBSD:
 174       bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0);
 175       break;
 176
 177     case M_ARM6_NETBSD:
 178       bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_3);
 179       break;
 180
 181     case M_X86_64_NETBSD:
 182       bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
 183       break;
 184
 185     case M_386_NETBSD:
 186       bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386);
 187       break;
 188
 189     case M_68K_NETBSD:
 190     case M_68K4K_NETBSD:
 191       bfd_default_set_arch_mach (abfd, bfd_arch_m68k, 0);
 192       break;
 193
 194     case M_88K_OPENBSD:
 195       bfd_default_set_arch_mach (abfd, bfd_arch_m88k, 0);
 196       break;
 197
 198     case M_HPPA_OPENBSD:
 199       bfd_default_set_arch_mach (abfd, bfd_arch_hppa, bfd_mach_hppa11);
 200       break;
 201
 202     case M_POWERPC_NETBSD:
 203       bfd_default_set_arch_mach (abfd, bfd_arch_powerpc, bfd_mach_ppc);
 204       break;
 205
 206     case M_SPARC_NETBSD:
 207       bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc);
 208       break;
 209
 210     case M_SPARC64_NETBSD:
 211     case M_SPARC64_OPENBSD:
 212       bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc_v9);
 213       break;
 214
 215     case M_VAX_NETBSD:
 216     case M_VAX4K_NETBSD:
 217       bfd_default_set_arch_mach (abfd, bfd_arch_vax, 0);
 218       break;
 219     }
 220
 221   /* OK, we believe you.  You're a core file (sure, sure).  */
 222   return abfd->xvec;
 223
 224  punt:
 225   bfd_release (abfd, abfd->tdata.any);
 226   abfd->tdata.any = NULL;
 227   bfd_section_list_clear (abfd);
 228   return 0;
 229 }
 230
 231 static char*
 232 netbsd_core_file_failing_command (abfd)
 233         bfd *abfd;
 234 {
 235  /*return core_command (abfd);*/
 236   return abfd->tdata.netbsd_core_data->core.c_name;
 237 }
 238
 239 static int
 240 netbsd_core_file_failing_signal (abfd)
 241         bfd *abfd;
 242 {
 243   /*return core_signal (abfd);*/
 244   return abfd->tdata.netbsd_core_data->core.c_signo;
 245 }
 246
 247 static bfd_boolean
 248 netbsd_core_file_matches_executable_p  (core_bfd, exec_bfd)
 249      bfd *core_bfd ATTRIBUTE_UNUSED;
 250      bfd *exec_bfd ATTRIBUTE_UNUSED;
 251 {
 252   /* FIXME, We have no way of telling at this point.  */
 253   return TRUE;
 254 }
 255 \f
 256 /* If somebody calls any byte-swapping routines, shoot them.  */
 257
 258 static void
 259 swap_abort ()
 260 {
 261  /* This way doesn't require any declaration for ANSI to fuck up.  */
 262   abort ();
 263 }
 264
 265 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
 266 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
 267 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
 268 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
 269 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
 270 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
 271
 272 const bfd_target netbsd_core_vec =
 273   {
 274     "netbsd-core",
 275     bfd_target_unknown_flavour,
 276     BFD_ENDIAN_UNKNOWN,         /* Target byte order.  */
 277     BFD_ENDIAN_UNKNOWN,         /* Target headers byte order.  */
 278     (HAS_RELOC | EXEC_P |       /* Object flags.  */
 279      HAS_LINENO | HAS_DEBUG |
 280      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 281     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* Section flags.  */
 282     0,                                                     /* Symbol prefix.  */
 283     ' ',                                                   /* ar_pad_char.  */
 284     16,                                                    /* ar_max_namelen.  */
 285     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit data.  */
 286     NO_GET, NO_GETS, NO_PUT,            /* 32 bit data.  */
 287     NO_GET, NO_GETS, NO_PUT,            /* 16 bit data.  */
 288     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit hdrs.  */
 289     NO_GET, NO_GETS, NO_PUT,            /* 32 bit hdrs.  */
 290     NO_GET, NO_GETS, NO_PUT,            /* 16 bit hdrs.  */
 291
 292     {                                   /* bfd_check_format.  */
 293       _bfd_dummy_target,                /* Unknown format.  */
 294       _bfd_dummy_target,                /* Object file.  */
 295       _bfd_dummy_target,                /* Archive.  */
 296       netbsd_core_file_p                /* A core file.  */
 297     },
 298     {                                   /* bfd_set_format.  */
 299       bfd_false, bfd_false,
 300       bfd_false, bfd_false
 301     },
 302     {                                   /* bfd_write_contents.  */
 303       bfd_false, bfd_false,
 304       bfd_false, bfd_false
 305     },
 306
 307     BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 308     BFD_JUMP_TABLE_COPY (_bfd_generic),
 309     BFD_JUMP_TABLE_CORE (netbsd),
 310     BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 311     BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 312     BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 313     BFD_JUMP_TABLE_WRITE (_bfd_generic),
 314     BFD_JUMP_TABLE_LINK (_bfd_nolink),
 315     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 316
 317     NULL,
 318
 319     (PTR) 0                             /* Backend_data.  */
 320   };