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
   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 /*
  34  * FIXME: On NetBSD/sparc CORE_FPU_OFFSET should be (sizeof (struct trapframe))
  35  */
  36
  37 struct netbsd_core_struct {
  38         struct core core;
  39 } *rawptr;
  40
  41 /* forward declarations */
  42
  43 static const bfd_target *netbsd_core_file_p
  44   PARAMS ((bfd *abfd));
  45 static char *netbsd_core_file_failing_command
  46   PARAMS ((bfd *abfd));
  47 static int netbsd_core_file_failing_signal
  48   PARAMS ((bfd *abfd));
  49 static bfd_boolean netbsd_core_file_matches_executable_p
  50   PARAMS ((bfd *core_bfd, bfd *exec_bfd));
  51 static void swap_abort
  52   PARAMS ((void));
  53
  54 /* Handle NetBSD-style core dump file.  */
  55
  56 static const bfd_target *
  57 netbsd_core_file_p (abfd)
  58      bfd *abfd;
  59
  60 {
  61   int i, val;
  62   file_ptr offset;
  63   asection *asect, *asect2;
  64   struct core core;
  65   struct coreseg coreseg;
  66   bfd_size_type amt = sizeof core;
  67
  68   val = bfd_bread ((void *) &core, amt, abfd);
  69   if (val != sizeof core)
  70     {
  71       /* Too small to be a core file */
  72       bfd_set_error (bfd_error_wrong_format);
  73       return 0;
  74     }
  75
  76   if (CORE_GETMAGIC (core) != COREMAGIC)
  77     {
  78       bfd_set_error (bfd_error_wrong_format);
  79       return 0;
  80     }
  81
  82   amt = sizeof (struct netbsd_core_struct);
  83   rawptr = (struct netbsd_core_struct *) bfd_zalloc (abfd, amt);
  84   if (rawptr == NULL)
  85     return 0;
  86
  87   rawptr->core = core;
  88   abfd->tdata.netbsd_core_data = rawptr;
  89
  90   offset = core.c_hdrsize;
  91   for (i = 0; i < core.c_nseg; i++)
  92     {
  93       const char *sname;
  94       flagword flags;
  95
  96       if (bfd_seek (abfd, offset, SEEK_SET) != 0)
  97         goto punt;
  98
  99       val = bfd_bread ((void *) &coreseg, (bfd_size_type) sizeof coreseg, abfd);
 100       if (val != sizeof coreseg)
 101         {
 102           bfd_set_error (bfd_error_file_truncated);
 103           goto punt;
 104         }
 105       if (CORE_GETMAGIC (coreseg) != CORESEGMAGIC)
 106         {
 107           bfd_set_error (bfd_error_wrong_format);
 108           goto punt;
 109         }
 110
 111       offset += core.c_seghdrsize;
 112
 113       switch (CORE_GETFLAG (coreseg))
 114         {
 115         case CORE_CPU:
 116           sname = ".reg";
 117           flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 118           break;
 119         case CORE_DATA:
 120           sname = ".data";
 121           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 122           break;
 123         case CORE_STACK:
 124           sname = ".stack";
 125           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 126           break;
 127         default:
 128           sname = ".unknown";
 129           flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 130           break;
 131         }
 132       asect = bfd_make_section_anyway (abfd, sname);
 133       if (asect == NULL)
 134         goto punt;
 135
 136       asect->flags = flags;
 137       asect->_raw_size = coreseg.c_size;
 138       asect->vma = coreseg.c_addr;
 139       asect->filepos = offset;
 140       asect->alignment_power = 2;
 141
 142       offset += coreseg.c_size;
 143
 144 #ifdef CORE_FPU_OFFSET
 145       switch (CORE_GETFLAG (coreseg))
 146         {
 147         case CORE_CPU:
 148           /* Hackish...  */
 149           asect->_raw_size = CORE_FPU_OFFSET;
 150           asect2 = bfd_make_section_anyway (abfd, ".reg2");
 151           if (asect2 == NULL)
 152             goto punt;
 153           asect2->_raw_size = coreseg.c_size - CORE_FPU_OFFSET;
 154           asect2->vma = 0;
 155           asect2->filepos = asect->filepos + CORE_FPU_OFFSET;
 156           asect2->alignment_power = 2;
 157           asect2->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 158           break;
 159         }
 160 #endif
 161     }
 162
 163   /* OK, we believe you.  You're a core file (sure, sure).  */
 164   return abfd->xvec;
 165
 166  punt:
 167   bfd_release (abfd, abfd->tdata.any);
 168   abfd->tdata.any = NULL;
 169   bfd_section_list_clear (abfd);
 170   return 0;
 171 }
 172
 173 static char*
 174 netbsd_core_file_failing_command (abfd)
 175         bfd *abfd;
 176 {
 177  /*return core_command (abfd);*/
 178   return abfd->tdata.netbsd_core_data->core.c_name;
 179 }
 180
 181 static int
 182 netbsd_core_file_failing_signal (abfd)
 183         bfd *abfd;
 184 {
 185   /*return core_signal (abfd);*/
 186   return abfd->tdata.netbsd_core_data->core.c_signo;
 187 }
 188
 189 static bfd_boolean
 190 netbsd_core_file_matches_executable_p  (core_bfd, exec_bfd)
 191      bfd *core_bfd ATTRIBUTE_UNUSED;
 192      bfd *exec_bfd ATTRIBUTE_UNUSED;
 193 {
 194   return TRUE;          /* FIXME, We have no way of telling at this point */
 195 }
 196 \f
 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 netbsd_core_vec =
 209   {
 210     "netbsd-core",
 211     bfd_target_unknown_flavour,
 212     BFD_ENDIAN_UNKNOWN,         /* target byte order */
 213     BFD_ENDIAN_UNKNOWN,         /* 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      netbsd_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 (netbsd),
 246        BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 247        BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 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 };