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 /* ARGSUSED */
  57 static const bfd_target *
  58 netbsd_core_file_p (abfd)
  59      bfd *abfd;
  60
  61 {
  62   int i, val;
  63   file_ptr offset;
  64   asection *asect, *asect2;
  65   struct core core;
  66   struct coreseg coreseg;
  67   bfd_size_type amt = sizeof core;
  68
  69   val = bfd_bread ((void *) &core, amt, abfd);
  70   if (val != sizeof core)
  71     {
  72       /* Too small to be a core file */
  73       bfd_set_error (bfd_error_wrong_format);
  74       return 0;
  75     }
  76
  77   if (CORE_GETMAGIC (core) != COREMAGIC)
  78     {
  79       bfd_set_error (bfd_error_wrong_format);
  80       return 0;
  81     }
  82
  83   amt = sizeof (struct netbsd_core_struct);
  84   rawptr = (struct netbsd_core_struct *) bfd_zalloc (abfd, amt);
  85   if (rawptr == NULL)
  86     return 0;
  87
  88   rawptr->core = core;
  89   abfd->tdata.netbsd_core_data = rawptr;
  90
  91   offset = core.c_hdrsize;
  92   for (i = 0; i < core.c_nseg; i++)
  93     {
  94       const char *sname;
  95       flagword flags;
  96
  97       if (bfd_seek (abfd, offset, SEEK_SET) != 0)
  98         goto punt;
  99
 100       val = bfd_bread ((void *) &coreseg, (bfd_size_type) sizeof coreseg, abfd);
 101       if (val != sizeof coreseg)
 102         {
 103           bfd_set_error (bfd_error_file_truncated);
 104           goto punt;
 105         }
 106       if (CORE_GETMAGIC (coreseg) != CORESEGMAGIC)
 107         {
 108           bfd_set_error (bfd_error_wrong_format);
 109           goto punt;
 110         }
 111
 112       offset += core.c_seghdrsize;
 113
 114       switch (CORE_GETFLAG (coreseg))
 115         {
 116         case CORE_CPU:
 117           sname = ".reg";
 118           flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 119           break;
 120         case CORE_DATA:
 121           sname = ".data";
 122           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 123           break;
 124         case CORE_STACK:
 125           sname = ".stack";
 126           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 127           break;
 128         default:
 129           sname = ".unknown";
 130           flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 131           break;
 132         }
 133       asect = bfd_make_section_anyway (abfd, sname);
 134       if (asect == NULL)
 135         goto punt;
 136
 137       asect->flags = flags;
 138       asect->_raw_size = coreseg.c_size;
 139       asect->vma = coreseg.c_addr;
 140       asect->filepos = offset;
 141       asect->alignment_power = 2;
 142
 143       offset += coreseg.c_size;
 144
 145 #ifdef CORE_FPU_OFFSET
 146       switch (CORE_GETFLAG (coreseg))
 147         {
 148         case CORE_CPU:
 149           /* Hackish...  */
 150           asect->_raw_size = CORE_FPU_OFFSET;
 151           asect2 = bfd_make_section_anyway (abfd, ".reg2");
 152           if (asect2 == NULL)
 153             goto punt;
 154           asect2->_raw_size = coreseg.c_size - CORE_FPU_OFFSET;
 155           asect2->vma = 0;
 156           asect2->filepos = asect->filepos + CORE_FPU_OFFSET;
 157           asect2->alignment_power = 2;
 158           asect2->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 159           break;
 160         }
 161 #endif
 162     }
 163
 164   /* OK, we believe you.  You're a core file (sure, sure).  */
 165   return abfd->xvec;
 166
 167  punt:
 168   bfd_release (abfd, abfd->tdata.any);
 169   abfd->tdata.any = NULL;
 170   bfd_section_list_clear (abfd);
 171   return 0;
 172 }
 173
 174 static char*
 175 netbsd_core_file_failing_command (abfd)
 176         bfd *abfd;
 177 {
 178  /*return core_command (abfd);*/
 179   return abfd->tdata.netbsd_core_data->core.c_name;
 180 }
 181
 182 /* ARGSUSED */
 183 static int
 184 netbsd_core_file_failing_signal (abfd)
 185         bfd *abfd;
 186 {
 187   /*return core_signal (abfd);*/
 188   return abfd->tdata.netbsd_core_data->core.c_signo;
 189 }
 190
 191 /* ARGSUSED */
 192 static bfd_boolean
 193 netbsd_core_file_matches_executable_p  (core_bfd, exec_bfd)
 194      bfd *core_bfd ATTRIBUTE_UNUSED;
 195      bfd *exec_bfd ATTRIBUTE_UNUSED;
 196 {
 197   return TRUE;          /* FIXME, We have no way of telling at this point */
 198 }
 199 \f
 200 /* If somebody calls any byte-swapping routines, shoot them.  */
 201 static void
 202 swap_abort ()
 203 {
 204   abort (); /* This way doesn't require any declaration for ANSI to fuck up */
 205 }
 206 #define NO_GET  ((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )
 207 #define NO_PUT  ((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
 208 #define NO_SIGNED_GET \
 209   ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
 210
 211 const bfd_target netbsd_core_vec =
 212   {
 213     "netbsd-core",
 214     bfd_target_unknown_flavour,
 215     BFD_ENDIAN_UNKNOWN,         /* target byte order */
 216     BFD_ENDIAN_UNKNOWN,         /* target headers byte order */
 217     (HAS_RELOC | EXEC_P |       /* object flags */
 218      HAS_LINENO | HAS_DEBUG |
 219      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 220     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 221     0,                                                     /* symbol prefix */
 222     ' ',                                                   /* ar_pad_char */
 223     16,                                                    /* ar_max_namelen */
 224     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit data */
 225     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit data */
 226     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit data */
 227     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit hdrs */
 228     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit hdrs */
 229     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit hdrs */
 230
 231     {                           /* bfd_check_format */
 232      _bfd_dummy_target,         /* unknown format */
 233      _bfd_dummy_target,         /* object file */
 234      _bfd_dummy_target,         /* archive */
 235      netbsd_core_file_p         /* a core file */
 236     },
 237     {                           /* bfd_set_format */
 238      bfd_false, bfd_false,
 239      bfd_false, bfd_false
 240     },
 241     {                           /* bfd_write_contents */
 242      bfd_false, bfd_false,
 243      bfd_false, bfd_false
 244     },
 245
 246        BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 247        BFD_JUMP_TABLE_COPY (_bfd_generic),
 248        BFD_JUMP_TABLE_CORE (netbsd),
 249        BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 250        BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 251        BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 252        BFD_JUMP_TABLE_WRITE (_bfd_generic),
 253        BFD_JUMP_TABLE_LINK (_bfd_nolink),
 254        BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 255
 256     NULL,
 257
 258     (PTR) 0                     /* backend_data */
 259 };