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    Free Software Foundation, Inc.
   4    Written by Paul Kranenburg, EUR
   5
   6 This file is part of BFD, the Binary File Descriptor library.
   7
   8 This program is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2 of the License, or
  11 (at your option) any later version.
  12
  13 This program is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with this program; if not, write to the Free Software
  20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  21
  22 #include "bfd.h"
  23 #include "sysdep.h"
  24 #include "libbfd.h"
  25 #include "libaout.h"           /* BFD a.out internal data structures */
  26
  27 #include <sys/param.h>
  28 #include <sys/dir.h>
  29 #include <signal.h>
  30 #include <sys/core.h>
  31
  32 /*
  33  * FIXME: On NetBSD/sparc CORE_FPU_OFFSET should be (sizeof (struct trapframe))
  34  */
  35
  36 struct netbsd_core_struct {
  37         struct core core;
  38 } *rawptr;
  39
  40 /* forward declarations */
  41
  42 static const bfd_target *netbsd_core_file_p PARAMS ((bfd *abfd));
  43 static char *netbsd_core_file_failing_command PARAMS ((bfd *abfd));
  44 static int netbsd_core_file_failing_signal PARAMS ((bfd *abfd));
  45 static boolean netbsd_core_file_matches_executable_p
  46   PARAMS ((bfd *core_bfd, bfd *exec_bfd));
  47 static void swap_abort PARAMS ((void));
  48
  49 /* Handle NetBSD-style core dump file.  */
  50
  51 /* ARGSUSED */
  52 static const bfd_target *
  53 netbsd_core_file_p (abfd)
  54      bfd *abfd;
  55
  56 {
  57   int i, val;
  58   file_ptr offset;
  59   asection *asect, *asect2;
  60   struct core core;
  61   struct coreseg coreseg;
  62   bfd_size_type amt = sizeof core;
  63
  64   val = bfd_bread ((void *) &core, amt, abfd);
  65   if (val != sizeof core)
  66     {
  67       /* Too small to be a core file */
  68       bfd_set_error (bfd_error_wrong_format);
  69       return 0;
  70     }
  71
  72   if (CORE_GETMAGIC (core) != COREMAGIC)
  73     {
  74       bfd_set_error (bfd_error_wrong_format);
  75       return 0;
  76     }
  77
  78   amt = sizeof (struct netbsd_core_struct);
  79   rawptr = (struct netbsd_core_struct *) bfd_zalloc (abfd, amt);
  80   if (rawptr == NULL)
  81     {
  82       bfd_set_error (bfd_error_no_memory);
  83       return 0;
  84     }
  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
  93       if (bfd_seek (abfd, offset, SEEK_SET) != 0)
  94         goto punt;
  95
  96       val = bfd_bread ((void *) &coreseg, (bfd_size_type) sizeof coreseg, abfd);
  97       if (val != sizeof coreseg)
  98         {
  99           bfd_set_error (bfd_error_file_truncated);
 100           goto punt;
 101         }
 102       if (CORE_GETMAGIC (coreseg) != CORESEGMAGIC)
 103         {
 104           bfd_set_error (bfd_error_wrong_format);
 105           goto punt;
 106         }
 107
 108       offset += core.c_seghdrsize;
 109
 110       amt = sizeof (asection);
 111       asect = (asection *) bfd_zalloc (abfd, amt);
 112       if (asect == NULL)
 113         {
 114           bfd_set_error (bfd_error_no_memory);
 115           goto punt;
 116         }
 117
 118       asect->_raw_size = coreseg.c_size;
 119       asect->vma = coreseg.c_addr;
 120       asect->filepos = offset;
 121       asect->alignment_power = 2;
 122       asect->next = abfd->sections;
 123       abfd->sections = asect;
 124       abfd->section_count++;
 125       offset += coreseg.c_size;
 126
 127       switch (CORE_GETFLAG(coreseg))
 128         {
 129         case CORE_CPU:
 130           asect->name = ".reg";
 131           asect->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 132 #ifdef CORE_FPU_OFFSET
 133           /* Hackish...  */
 134           asect->_raw_size = CORE_FPU_OFFSET;
 135           amt = sizeof (asection);
 136           asect2 = (asection *) bfd_zalloc (abfd, amt);
 137           if (asect2 == NULL)
 138             {
 139               bfd_set_error (bfd_error_no_memory);
 140               goto punt;
 141             }
 142           asect2->_raw_size = coreseg.c_size - CORE_FPU_OFFSET;
 143           asect2->vma = 0;
 144           asect2->filepos = asect->filepos + CORE_FPU_OFFSET;
 145           asect2->alignment_power = 2;
 146           asect2->next = abfd->sections;
 147           asect2->name = ".reg2";
 148           asect2->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 149           abfd->sections = asect2;
 150           abfd->section_count++;
 151 #endif
 152
 153           break;
 154         case CORE_DATA:
 155           asect->name = ".data";
 156           asect->flags = SEC_ALLOC+SEC_LOAD+SEC_HAS_CONTENTS;
 157           break;
 158         case CORE_STACK:
 159           asect->name = ".stack";
 160           asect->flags = SEC_ALLOC+SEC_LOAD+SEC_HAS_CONTENTS;
 161           break;
 162         }
 163     }
 164
 165   /* OK, we believe you.  You're a core file (sure, sure).  */
 166   return abfd->xvec;
 167
 168  punt:
 169   {
 170     asection *anext;
 171     for (asect = abfd->sections; asect; asect = anext)
 172       {
 173         anext = asect->next;
 174         free ((void *) asect);
 175       }
 176   }
 177
 178   free ((void *) rawptr);
 179   abfd->tdata.netbsd_core_data = NULL;
 180   abfd->sections = NULL;
 181   abfd->section_count = 0;
 182   return 0;
 183 }
 184
 185 static char*
 186 netbsd_core_file_failing_command (abfd)
 187         bfd *abfd;
 188 {
 189  /*return core_command (abfd);*/
 190   return abfd->tdata.netbsd_core_data->core.c_name;
 191 }
 192
 193 /* ARGSUSED */
 194 static int
 195 netbsd_core_file_failing_signal (abfd)
 196         bfd *abfd;
 197 {
 198   /*return core_signal (abfd);*/
 199   return abfd->tdata.netbsd_core_data->core.c_signo;
 200 }
 201
 202 /* ARGSUSED */
 203 static boolean
 204 netbsd_core_file_matches_executable_p  (core_bfd, exec_bfd)
 205      bfd *core_bfd ATTRIBUTE_UNUSED;
 206      bfd *exec_bfd ATTRIBUTE_UNUSED;
 207 {
 208   return true;          /* FIXME, We have no way of telling at this point */
 209 }
 210 \f
 211 /* If somebody calls any byte-swapping routines, shoot them.  */
 212 static void
 213 swap_abort ()
 214 {
 215   abort (); /* This way doesn't require any declaration for ANSI to fuck up */
 216 }
 217 #define NO_GET  ((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )
 218 #define NO_PUT  ((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
 219 #define NO_SIGNED_GET \
 220   ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
 221
 222 const bfd_target netbsd_core_vec =
 223   {
 224     "netbsd-core",
 225     bfd_target_unknown_flavour,
 226     BFD_ENDIAN_UNKNOWN,         /* target byte order */
 227     BFD_ENDIAN_UNKNOWN,         /* target headers byte order */
 228     (HAS_RELOC | EXEC_P |       /* object flags */
 229      HAS_LINENO | HAS_DEBUG |
 230      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 231     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 232     0,                                                     /* symbol prefix */
 233     ' ',                                                   /* ar_pad_char */
 234     16,                                                    /* ar_max_namelen */
 235     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit data */
 236     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit data */
 237     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit data */
 238     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit hdrs */
 239     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit hdrs */
 240     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit hdrs */
 241
 242     {                           /* bfd_check_format */
 243      _bfd_dummy_target,         /* unknown format */
 244      _bfd_dummy_target,         /* object file */
 245      _bfd_dummy_target,         /* archive */
 246      netbsd_core_file_p         /* a core file */
 247     },
 248     {                           /* bfd_set_format */
 249      bfd_false, bfd_false,
 250      bfd_false, bfd_false
 251     },
 252     {                           /* bfd_write_contents */
 253      bfd_false, bfd_false,
 254      bfd_false, bfd_false
 255     },
 256
 257        BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 258        BFD_JUMP_TABLE_COPY (_bfd_generic),
 259        BFD_JUMP_TABLE_CORE (netbsd),
 260        BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 261        BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 262        BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 263        BFD_JUMP_TABLE_WRITE (_bfd_generic),
 264        BFD_JUMP_TABLE_LINK (_bfd_nolink),
 265        BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 266
 267     NULL,
 268
 269     (PTR) 0                     /* backend_data */
 270 };