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, 2006, 2007, 2012
   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 3 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., 51 Franklin Street - Fifth Floor, Boston,
  22    MA 02110-1301, USA.  */
  23
  24 #include "sysdep.h"
  25 #include "bfd.h"
  26 #include "libbfd.h"
  27 #include "libaout.h"           /* BFD a.out internal data structures.  */
  28
  29 #include <sys/param.h>
  30 #include <sys/dir.h>
  31 #include <signal.h>
  32 #include <sys/core.h>
  33
  34 /* The machine ID for OpenBSD/sparc64 and older versions of
  35    NetBSD/sparc64 overlaps with M_MIPS1.  */
  36 #define M_SPARC64_OPENBSD       M_MIPS1
  37
  38 /* Offset of StackGhost cookie within `struct md_coredump' on
  39    OpenBSD/sparc.  */
  40 #define SPARC_WCOOKIE_OFFSET    344
  41
  42 /* Offset of StackGhost cookie within `struct md_coredump' on
  43    OpenBSD/sparc64.  */
  44 #define SPARC64_WCOOKIE_OFFSET  832
  45
  46 #define netbsd_core_file_matches_executable_p generic_core_file_matches_executable_p
  47 #define netbsd_core_file_pid _bfd_nocore_core_file_pid
  48
  49 struct netbsd_core_struct
  50 {
  51   struct core core;
  52 } *rawptr;
  53
  54 /* Handle NetBSD-style core dump file.  */
  55
  56 static const bfd_target *
  57 netbsd_core_file_p (bfd *abfd)
  58 {
  59   int val;
  60   unsigned i;
  61   file_ptr offset;
  62   asection *asect;
  63   struct core core;
  64   struct coreseg coreseg;
  65   bfd_size_type amt = sizeof core;
  66
  67   val = bfd_bread (&core, amt, abfd);
  68   if (val != sizeof core)
  69     {
  70       /* Too small to be a core file.  */
  71       bfd_set_error (bfd_error_wrong_format);
  72       return 0;
  73     }
  74
  75   if (CORE_GETMAGIC (core) != COREMAGIC)
  76     {
  77       bfd_set_error (bfd_error_wrong_format);
  78       return 0;
  79     }
  80
  81   amt = sizeof (struct netbsd_core_struct);
  82   rawptr = (struct netbsd_core_struct *) bfd_zalloc (abfd, amt);
  83   if (rawptr == NULL)
  84     return 0;
  85
  86   rawptr->core = core;
  87   abfd->tdata.netbsd_core_data = rawptr;
  88
  89   offset = core.c_hdrsize;
  90   for (i = 0; i < core.c_nseg; i++)
  91     {
  92       const char *sname;
  93       flagword flags;
  94
  95       if (bfd_seek (abfd, offset, SEEK_SET) != 0)
  96         goto punt;
  97
  98       val = bfd_bread (&coreseg, sizeof coreseg, abfd);
  99       if (val != sizeof coreseg)
 100         {
 101           bfd_set_error (bfd_error_file_truncated);
 102           goto punt;
 103         }
 104       if (CORE_GETMAGIC (coreseg) != CORESEGMAGIC)
 105         {
 106           bfd_set_error (bfd_error_wrong_format);
 107           goto punt;
 108         }
 109
 110       offset += core.c_seghdrsize;
 111
 112       switch (CORE_GETFLAG (coreseg))
 113         {
 114         case CORE_CPU:
 115           sname = ".reg";
 116           flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 117           break;
 118         case CORE_DATA:
 119           sname = ".data";
 120           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 121           break;
 122         case CORE_STACK:
 123           sname = ".stack";
 124           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 125           break;
 126         default:
 127           sname = ".unknown";
 128           flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 129           break;
 130         }
 131       asect = bfd_make_section_anyway_with_flags (abfd, sname, flags);
 132       if (asect == NULL)
 133         goto punt;
 134
 135       asect->size = coreseg.c_size;
 136       asect->vma = coreseg.c_addr;
 137       asect->filepos = offset;
 138       asect->alignment_power = 2;
 139
 140       if (CORE_GETFLAG (coreseg) == CORE_CPU)
 141         {
 142           bfd_size_type wcookie_offset;
 143
 144           switch (CORE_GETMID (core))
 145             {
 146             case M_SPARC_NETBSD:
 147               wcookie_offset = SPARC_WCOOKIE_OFFSET;
 148               break;
 149             case M_SPARC64_OPENBSD:
 150               wcookie_offset = SPARC64_WCOOKIE_OFFSET;
 151               break;
 152             default:
 153               wcookie_offset = 0;
 154               break;
 155             }
 156
 157           if (wcookie_offset > 0 && coreseg.c_size > wcookie_offset)
 158             {
 159               /* Truncate the .reg section.  */
 160               asect->size = wcookie_offset;
 161
 162               /* And create the .wcookie section.  */
 163               flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 164               asect = bfd_make_section_anyway_with_flags (abfd, ".wcookie",
 165                                                           flags);
 166               if (asect == NULL)
 167                 goto punt;
 168
 169               asect->size = coreseg.c_size - wcookie_offset;
 170               asect->vma = 0;
 171               asect->filepos = offset + wcookie_offset;
 172               asect->alignment_power = 2;
 173             }
 174         }
 175
 176       offset += coreseg.c_size;
 177     }
 178
 179   /* Set architecture from machine ID.  */
 180   switch (CORE_GETMID (core))
 181     {
 182     case M_ALPHA_NETBSD:
 183       bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0);
 184       break;
 185
 186     case M_ARM6_NETBSD:
 187       bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_3);
 188       break;
 189
 190     case M_X86_64_NETBSD:
 191       bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
 192       break;
 193
 194     case M_386_NETBSD:
 195       bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386);
 196       break;
 197
 198     case M_68K_NETBSD:
 199     case M_68K4K_NETBSD:
 200       bfd_default_set_arch_mach (abfd, bfd_arch_m68k, 0);
 201       break;
 202
 203     case M_88K_OPENBSD:
 204       bfd_default_set_arch_mach (abfd, bfd_arch_m88k, 0);
 205       break;
 206
 207     case M_HPPA_OPENBSD:
 208       bfd_default_set_arch_mach (abfd, bfd_arch_hppa, bfd_mach_hppa11);
 209       break;
 210
 211     case M_POWERPC_NETBSD:
 212       bfd_default_set_arch_mach (abfd, bfd_arch_powerpc, bfd_mach_ppc);
 213       break;
 214
 215     case M_SPARC_NETBSD:
 216       bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc);
 217       break;
 218
 219     case M_SPARC64_NETBSD:
 220     case M_SPARC64_OPENBSD:
 221       bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc_v9);
 222       break;
 223
 224     case M_VAX_NETBSD:
 225     case M_VAX4K_NETBSD:
 226       bfd_default_set_arch_mach (abfd, bfd_arch_vax, 0);
 227       break;
 228     }
 229
 230   /* OK, we believe you.  You're a core file (sure, sure).  */
 231   return abfd->xvec;
 232
 233  punt:
 234   bfd_release (abfd, abfd->tdata.any);
 235   abfd->tdata.any = NULL;
 236   bfd_section_list_clear (abfd);
 237   return 0;
 238 }
 239
 240 static char*
 241 netbsd_core_file_failing_command (bfd *abfd)
 242 {
 243   /*return core_command (abfd);*/
 244   return abfd->tdata.netbsd_core_data->core.c_name;
 245 }
 246
 247 static int
 248 netbsd_core_file_failing_signal (bfd *abfd)
 249 {
 250   /*return core_signal (abfd);*/
 251   return abfd->tdata.netbsd_core_data->core.c_signo;
 252 }
 253 \f
 254 /* If somebody calls any byte-swapping routines, shoot them.  */
 255
 256 static void
 257 swap_abort (void)
 258 {
 259  /* This way doesn't require any declaration for ANSI to fuck up.  */
 260   abort ();
 261 }
 262
 263 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
 264 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
 265 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
 266 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
 267 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
 268 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
 269
 270 const bfd_target netbsd_core_vec =
 271   {
 272     "netbsd-core",
 273     bfd_target_unknown_flavour,
 274     BFD_ENDIAN_UNKNOWN,         /* Target byte order.  */
 275     BFD_ENDIAN_UNKNOWN,         /* Target headers byte order.  */
 276     (HAS_RELOC | EXEC_P |       /* Object flags.  */
 277      HAS_LINENO | HAS_DEBUG |
 278      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 279     (SEC_HAS_CONTENTS |         /* Section flags.  */
 280      SEC_ALLOC | SEC_LOAD | SEC_RELOC),
 281     0,                          /* Symbol prefix.  */
 282     ' ',                        /* ar_pad_char.  */
 283     16,                         /* ar_max_namelen.  */
 284     0,                          /* Match priority.  */
 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     NULL                                /* Backend_data.  */
 320   };