bfd/netbsd-core.c

   1 /* BFD back end for NetBSD style core files
   2    Copyright 1988, 1989, 1991, 1992, 1993, 1996, 1998, 1999, 2000
   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, offset;
  58         asection        *asect, *asect2;
  59         struct core     core;
  60         struct coreseg  coreseg;
  61
  62         val = bfd_read ((void *)&core, 1, sizeof core, abfd);
  63         if (val != sizeof core) {
  64                 /* Too small to be a core file */
  65                 bfd_set_error(bfd_error_wrong_format);
  66                 return 0;
  67         }
  68
  69         if (CORE_GETMAGIC(core) != COREMAGIC) {
  70                 bfd_set_error(bfd_error_wrong_format);
  71                 return 0;
  72         }
  73
  74         rawptr = (struct netbsd_core_struct *)
  75                 bfd_zalloc (abfd, sizeof (struct netbsd_core_struct));
  76         if (rawptr == NULL) {
  77                 bfd_set_error(bfd_error_no_memory);
  78                 return 0;
  79         }
  80
  81         rawptr->core = core;
  82         abfd->tdata.netbsd_core_data = rawptr;
  83
  84         offset = core.c_hdrsize;
  85         for (i = 0; i < core.c_nseg; i++) {
  86
  87                 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
  88                         goto punt;
  89
  90                 val = bfd_read ((void *)&coreseg, 1, sizeof coreseg, abfd);
  91                 if (val != sizeof coreseg) {
  92                         bfd_set_error(bfd_error_file_truncated);
  93                         goto punt;
  94                 }
  95                 if (CORE_GETMAGIC(coreseg) != CORESEGMAGIC) {
  96                         bfd_set_error(bfd_error_wrong_format);
  97                         goto punt;
  98                 }
  99
 100                 offset += core.c_seghdrsize;
 101
 102                 asect = (asection *) bfd_zalloc (abfd, sizeof (asection));
 103                 if (asect == NULL) {
 104                         bfd_set_error(bfd_error_no_memory);
 105                         goto punt;
 106                 }
 107
 108                 asect->_raw_size = coreseg.c_size;
 109                 asect->vma = coreseg.c_addr;
 110                 asect->filepos = offset;
 111                 asect->alignment_power = 2;
 112                 asect->next = abfd->sections;
 113                 abfd->sections = asect;
 114                 abfd->section_count++;
 115                 offset += coreseg.c_size;
 116
 117                 switch (CORE_GETFLAG(coreseg)) {
 118                 case CORE_CPU:
 119                         asect->name = ".reg";
 120                         asect->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 121 #ifdef CORE_FPU_OFFSET
 122                         /* Hackish...  */
 123                         asect->_raw_size = CORE_FPU_OFFSET;
 124                         asect2 = (asection *)bfd_zalloc (abfd,
 125                                                          sizeof (asection));
 126                         if (asect2 == NULL) {
 127                                 bfd_set_error(bfd_error_no_memory);
 128                                 goto punt;
 129                         }
 130                         asect2->_raw_size = coreseg.c_size - CORE_FPU_OFFSET;
 131                         asect2->vma = 0;
 132                         asect2->filepos = asect->filepos + CORE_FPU_OFFSET;
 133                         asect2->alignment_power = 2;
 134                         asect2->next = abfd->sections;
 135                         asect2->name = ".reg2";
 136                         asect2->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 137                         abfd->sections = asect2;
 138                         abfd->section_count++;
 139 #endif
 140
 141                         break;
 142                 case CORE_DATA:
 143                         asect->name = ".data";
 144                         asect->flags = SEC_ALLOC+SEC_LOAD+SEC_HAS_CONTENTS;
 145                         break;
 146                 case CORE_STACK:
 147                         asect->name = ".stack";
 148                         asect->flags = SEC_ALLOC+SEC_LOAD+SEC_HAS_CONTENTS;
 149                         break;
 150                 }
 151         }
 152
 153         /* OK, we believe you.  You're a core file (sure, sure).  */
 154         return abfd->xvec;
 155
 156 punt:   {
 157                 asection        *anext;
 158                 for (asect = abfd->sections; asect; asect = anext) {
 159                         anext = asect->next;
 160                         free((void *)asect);
 161                 }
 162         }
 163         free ((void *)rawptr);
 164         abfd->tdata.netbsd_core_data = NULL;
 165         abfd->sections = NULL;
 166         abfd->section_count = 0;
 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, *exec_bfd;
 191 {
 192   return true;          /* FIXME, We have no way of telling at this point */
 193 }
 194 \f
 195 /* If somebody calls any byte-swapping routines, shoot them.  */
 196 static void
 197 swap_abort ()
 198 {
 199   abort (); /* This way doesn't require any declaration for ANSI to fuck up */
 200 }
 201 #define NO_GET  ((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )
 202 #define NO_PUT  ((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
 203 #define NO_SIGNED_GET \
 204   ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
 205
 206 const bfd_target netbsd_core_vec =
 207   {
 208     "netbsd-core",
 209     bfd_target_unknown_flavour,
 210     BFD_ENDIAN_UNKNOWN,         /* target byte order */
 211     BFD_ENDIAN_UNKNOWN,         /* target headers byte order */
 212     (HAS_RELOC | EXEC_P |       /* object flags */
 213      HAS_LINENO | HAS_DEBUG |
 214      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 215     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 216     0,                                                     /* symbol prefix */
 217     ' ',                                                   /* ar_pad_char */
 218     16,                                                    /* ar_max_namelen */
 219     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit data */
 220     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit data */
 221     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit data */
 222     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit hdrs */
 223     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit hdrs */
 224     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit hdrs */
 225
 226     {                           /* bfd_check_format */
 227      _bfd_dummy_target,         /* unknown format */
 228      _bfd_dummy_target,         /* object file */
 229      _bfd_dummy_target,         /* archive */
 230      netbsd_core_file_p         /* a core file */
 231     },
 232     {                           /* bfd_set_format */
 233      bfd_false, bfd_false,
 234      bfd_false, bfd_false
 235     },
 236     {                           /* bfd_write_contents */
 237      bfd_false, bfd_false,
 238      bfd_false, bfd_false
 239     },
 240
 241        BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 242        BFD_JUMP_TABLE_COPY (_bfd_generic),
 243        BFD_JUMP_TABLE_CORE (netbsd),
 244        BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 245        BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 246        BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 247        BFD_JUMP_TABLE_WRITE (_bfd_generic),
 248        BFD_JUMP_TABLE_LINK (_bfd_nolink),
 249        BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 250
 251     NULL,
 252
 253     (PTR) 0                     /* backend_data */
 254 };