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 PARAMS ((bfd *abfd));
  44 static char *netbsd_core_file_failing_command PARAMS ((bfd *abfd));
  45 static int netbsd_core_file_failing_signal PARAMS ((bfd *abfd));
  46 static boolean netbsd_core_file_matches_executable_p
  47   PARAMS ((bfd *core_bfd, bfd *exec_bfd));
  48 static void swap_abort PARAMS ((void));
  49
  50 /* Handle NetBSD-style core dump file.  */
  51
  52 /* ARGSUSED */
  53 static const bfd_target *
  54 netbsd_core_file_p (abfd)
  55      bfd *abfd;
  56
  57 {
  58   int i, val;
  59   file_ptr offset;
  60   asection *asect, *asect2;
  61   struct core core;
  62   struct coreseg coreseg;
  63   bfd_size_type amt = sizeof core;
  64
  65   val = bfd_bread ((void *) &core, amt, abfd);
  66   if (val != sizeof core)
  67     {
  68       /* Too small to be a core file */
  69       bfd_set_error (bfd_error_wrong_format);
  70       return 0;
  71     }
  72
  73   if (CORE_GETMAGIC (core) != COREMAGIC)
  74     {
  75       bfd_set_error (bfd_error_wrong_format);
  76       return 0;
  77     }
  78
  79   amt = sizeof (struct netbsd_core_struct);
  80   rawptr = (struct netbsd_core_struct *) bfd_zalloc (abfd, amt);
  81   if (rawptr == NULL)
  82     return 0;
  83
  84   rawptr->core = core;
  85   abfd->tdata.netbsd_core_data = rawptr;
  86
  87   offset = core.c_hdrsize;
  88   for (i = 0; i < core.c_nseg; i++)
  89     {
  90       const char *sname;
  91       flagword flags;
  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       switch (CORE_GETFLAG (coreseg))
 111         {
 112         case CORE_CPU:
 113           sname = ".reg";
 114           flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 115           break;
 116         case CORE_DATA:
 117           sname = ".data";
 118           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 119           break;
 120         case CORE_STACK:
 121           sname = ".stack";
 122           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 123           break;
 124         default:
 125           sname = ".unknown";
 126           flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 127           break;
 128         }
 129       asect = bfd_make_section_anyway (abfd, sname);
 130       if (asect == NULL)
 131         goto punt;
 132
 133       asect->flags = flags;
 134       asect->_raw_size = coreseg.c_size;
 135       asect->vma = coreseg.c_addr;
 136       asect->filepos = offset;
 137       asect->alignment_power = 2;
 138
 139       offset += coreseg.c_size;
 140
 141 #ifdef CORE_FPU_OFFSET
 142       switch (CORE_GETFLAG (coreseg))
 143         {
 144         case CORE_CPU:
 145           /* Hackish...  */
 146           asect->_raw_size = CORE_FPU_OFFSET;
 147           asect2 = bfd_make_section_anyway (abfd, ".reg2");
 148           if (asect2 == NULL)
 149             goto punt;
 150           asect2->_raw_size = coreseg.c_size - CORE_FPU_OFFSET;
 151           asect2->vma = 0;
 152           asect2->filepos = asect->filepos + CORE_FPU_OFFSET;
 153           asect2->alignment_power = 2;
 154           asect2->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 155           break;
 156         }
 157 #endif
 158     }
 159
 160   /* OK, we believe you.  You're a core file (sure, sure).  */
 161   return abfd->xvec;
 162
 163  punt:
 164   bfd_release (abfd, abfd->tdata.any);
 165   abfd->tdata.any = NULL;
 166   bfd_section_list_clear (abfd);
 167   return 0;
 168 }
 169
 170 static char*
 171 netbsd_core_file_failing_command (abfd)
 172         bfd *abfd;
 173 {
 174  /*return core_command (abfd);*/
 175   return abfd->tdata.netbsd_core_data->core.c_name;
 176 }
 177
 178 /* ARGSUSED */
 179 static int
 180 netbsd_core_file_failing_signal (abfd)
 181         bfd *abfd;
 182 {
 183   /*return core_signal (abfd);*/
 184   return abfd->tdata.netbsd_core_data->core.c_signo;
 185 }
 186
 187 /* ARGSUSED */
 188 static boolean
 189 netbsd_core_file_matches_executable_p  (core_bfd, exec_bfd)
 190      bfd *core_bfd ATTRIBUTE_UNUSED;
 191      bfd *exec_bfd ATTRIBUTE_UNUSED;
 192 {
 193   return true;          /* FIXME, We have no way of telling at this point */
 194 }
 195 \f
 196 /* If somebody calls any byte-swapping routines, shoot them.  */
 197 static void
 198 swap_abort ()
 199 {
 200   abort (); /* This way doesn't require any declaration for ANSI to fuck up */
 201 }
 202 #define NO_GET  ((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )
 203 #define NO_PUT  ((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
 204 #define NO_SIGNED_GET \
 205   ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
 206
 207 const bfd_target netbsd_core_vec =
 208   {
 209     "netbsd-core",
 210     bfd_target_unknown_flavour,
 211     BFD_ENDIAN_UNKNOWN,         /* target byte order */
 212     BFD_ENDIAN_UNKNOWN,         /* target headers byte order */
 213     (HAS_RELOC | EXEC_P |       /* object flags */
 214      HAS_LINENO | HAS_DEBUG |
 215      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 216     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 217     0,                                                     /* symbol prefix */
 218     ' ',                                                   /* ar_pad_char */
 219     16,                                                    /* ar_max_namelen */
 220     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit data */
 221     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit data */
 222     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit data */
 223     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit hdrs */
 224     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit hdrs */
 225     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit hdrs */
 226
 227     {                           /* bfd_check_format */
 228      _bfd_dummy_target,         /* unknown format */
 229      _bfd_dummy_target,         /* object file */
 230      _bfd_dummy_target,         /* archive */
 231      netbsd_core_file_p         /* a core file */
 232     },
 233     {                           /* bfd_set_format */
 234      bfd_false, bfd_false,
 235      bfd_false, bfd_false
 236     },
 237     {                           /* bfd_write_contents */
 238      bfd_false, bfd_false,
 239      bfd_false, bfd_false
 240     },
 241
 242        BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 243        BFD_JUMP_TABLE_COPY (_bfd_generic),
 244        BFD_JUMP_TABLE_CORE (netbsd),
 245        BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 246        BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 247        BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 248        BFD_JUMP_TABLE_WRITE (_bfd_generic),
 249        BFD_JUMP_TABLE_LINK (_bfd_nolink),
 250        BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 251
 252     NULL,
 253
 254     (PTR) 0                     /* backend_data */
 255 };