bfd/netbsd-core.c

   1 /* BFD back end for NetBSD style core files
   2    Copyright 1988, 89, 91, 92, 93, 96, 1998 Free Software Foundation, Inc.
   3    Written by Paul Kranenburg, EUR
   4
   5 This file is part of BFD, the Binary File Descriptor library.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
  20
  21 #include "bfd.h"
  22 #include "sysdep.h"
  23 #include "libbfd.h"
  24 #include "libaout.h"           /* BFD a.out internal data structures */
  25
  26 #include <sys/param.h>
  27 #include <sys/dir.h>
  28 #include <signal.h>
  29 #include <sys/core.h>
  30
  31 /*
  32  * FIXME: On NetBSD/sparc CORE_FPU_OFFSET should be (sizeof(struct trapframe))
  33  */
  34
  35 struct netbsd_core_struct {
  36         struct core core;
  37 } *rawptr;
  38
  39 /* forward declarations */
  40
  41 static const bfd_target *       netbsd_core_file_p PARAMS ((bfd *abfd));
  42 static char *           netbsd_core_file_failing_command PARAMS ((bfd *abfd));
  43 static int              netbsd_core_file_failing_signal PARAMS ((bfd *abfd));
  44 static boolean          netbsd_core_file_matches_executable_p
  45                          PARAMS ((bfd *core_bfd, bfd *exec_bfd));
  46 static void             swap_abort PARAMS ((void));
  47
  48 /* Handle NetBSD-style core dump file.  */
  49
  50 /* ARGSUSED */
  51 static const bfd_target *
  52 netbsd_core_file_p (abfd)
  53      bfd *abfd;
  54
  55 {
  56         int             i, val, offset;
  57         asection        *asect, *asect2;
  58         struct core     core;
  59         struct coreseg  coreseg;
  60
  61         val = bfd_read ((void *)&core, 1, sizeof core, abfd);
  62         if (val != sizeof core) {
  63                 /* Too small to be a core file */
  64                 bfd_set_error(bfd_error_wrong_format);
  65                 return 0;
  66         }
  67
  68         if (CORE_GETMAGIC(core) != COREMAGIC) {
  69                 bfd_set_error(bfd_error_wrong_format);
  70                 return 0;
  71         }
  72
  73         rawptr = (struct netbsd_core_struct *)
  74                 bfd_zalloc (abfd, sizeof (struct netbsd_core_struct));
  75         if (rawptr == NULL) {
  76                 bfd_set_error(bfd_error_no_memory);
  77                 return 0;
  78         }
  79
  80         rawptr->core = core;
  81         abfd->tdata.netbsd_core_data = rawptr;
  82
  83         offset = core.c_hdrsize;
  84         for (i = 0; i < core.c_nseg; i++) {
  85
  86                 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
  87                         goto punt;
  88
  89                 val = bfd_read ((void *)&coreseg, 1, sizeof coreseg, abfd);
  90                 if (val != sizeof coreseg) {
  91                         bfd_set_error(bfd_error_file_truncated);
  92                         goto punt;
  93                 }
  94                 if (CORE_GETMAGIC(coreseg) != CORESEGMAGIC) {
  95                         bfd_set_error(bfd_error_wrong_format);
  96                         goto punt;
  97                 }
  98
  99                 offset += core.c_seghdrsize;
 100
 101                 asect = (asection *) bfd_zalloc (abfd, sizeof(asection));
 102                 if (asect == NULL) {
 103                         bfd_set_error(bfd_error_no_memory);
 104                         goto punt;
 105                 }
 106
 107                 asect->_raw_size = coreseg.c_size;
 108                 asect->vma = coreseg.c_addr;
 109                 asect->filepos = offset;
 110                 asect->alignment_power = 2;
 111                 asect->next = abfd->sections;
 112                 abfd->sections = asect;
 113                 abfd->section_count++;
 114                 offset += coreseg.c_size;
 115
 116                 switch (CORE_GETFLAG(coreseg)) {
 117                 case CORE_CPU:
 118                         asect->name = ".reg";
 119                         asect->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 120 #ifdef CORE_FPU_OFFSET
 121                         /* Hackish... */
 122                         asect->_raw_size = CORE_FPU_OFFSET;
 123                         asect2 = (asection *)bfd_zalloc (abfd,
 124                                                          sizeof (asection));
 125                         if (asect2 == NULL) {
 126                                 bfd_set_error(bfd_error_no_memory);
 127                                 goto punt;
 128                         }
 129                         asect2->_raw_size = coreseg.c_size - CORE_FPU_OFFSET;
 130                         asect2->vma = 0;
 131                         asect2->filepos = asect->filepos + CORE_FPU_OFFSET;
 132                         asect2->alignment_power = 2;
 133                         asect2->next = abfd->sections;
 134                         asect2->name = ".reg2";
 135                         asect2->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 136                         abfd->sections = asect2;
 137                         abfd->section_count++;
 138 #endif
 139
 140                         break;
 141                 case CORE_DATA:
 142                         asect->name = ".data";
 143                         asect->flags = SEC_ALLOC+SEC_LOAD+SEC_HAS_CONTENTS;
 144                         break;
 145                 case CORE_STACK:
 146                         asect->name = ".stack";
 147                         asect->flags = SEC_ALLOC+SEC_LOAD+SEC_HAS_CONTENTS;
 148                         break;
 149                 }
 150         }
 151
 152         /* OK, we believe you.  You're a core file (sure, sure).  */
 153         return abfd->xvec;
 154
 155 punt:   {
 156                 asection        *anext;
 157                 for (asect = abfd->sections; asect; asect = anext) {
 158                         anext = asect->next;
 159                         free((void *)asect);
 160                 }
 161         }
 162         free ((void *)rawptr);
 163         abfd->tdata.netbsd_core_data = NULL;
 164         abfd->sections = NULL;
 165         abfd->section_count = 0;
 166         return 0;
 167 }
 168
 169 static char*
 170 netbsd_core_file_failing_command (abfd)
 171         bfd *abfd;
 172 {
 173  /*return core_command (abfd);*/
 174   return abfd->tdata.netbsd_core_data->core.c_name;
 175 }
 176
 177 /* ARGSUSED */
 178 static int
 179 netbsd_core_file_failing_signal (abfd)
 180         bfd *abfd;
 181 {
 182   /*return core_signal (abfd);*/
 183   return abfd->tdata.netbsd_core_data->core.c_signo;
 184 }
 185
 186 /* ARGSUSED */
 187 static boolean
 188 netbsd_core_file_matches_executable_p  (core_bfd, exec_bfd)
 189      bfd *core_bfd, *exec_bfd;
 190 {
 191   return true;          /* FIXME, We have no way of telling at this point */
 192 }
 193 \f
 194 /* If somebody calls any byte-swapping routines, shoot them.  */
 195 static void
 196 swap_abort()
 197 {
 198   abort(); /* This way doesn't require any declaration for ANSI to fuck up */
 199 }
 200 #define NO_GET  ((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )
 201 #define NO_PUT  ((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
 202 #define NO_SIGNED_GET \
 203   ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
 204
 205 const bfd_target netbsd_core_vec =
 206   {
 207     "netbsd-core",
 208     bfd_target_unknown_flavour,
 209     BFD_ENDIAN_UNKNOWN,         /* target byte order */
 210     BFD_ENDIAN_UNKNOWN,         /* target headers byte order */
 211     (HAS_RELOC | EXEC_P |       /* object flags */
 212      HAS_LINENO | HAS_DEBUG |
 213      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 214     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 215     0,                                                     /* symbol prefix */
 216     ' ',                                                   /* ar_pad_char */
 217     16,                                                    /* ar_max_namelen */
 218     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit data */
 219     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit data */
 220     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit data */
 221     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit hdrs */
 222     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit hdrs */
 223     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit hdrs */
 224
 225     {                           /* bfd_check_format */
 226      _bfd_dummy_target,         /* unknown format */
 227      _bfd_dummy_target,         /* object file */
 228      _bfd_dummy_target,         /* archive */
 229      netbsd_core_file_p         /* a core file */
 230     },
 231     {                           /* bfd_set_format */
 232      bfd_false, bfd_false,
 233      bfd_false, bfd_false
 234     },
 235     {                           /* bfd_write_contents */
 236      bfd_false, bfd_false,
 237      bfd_false, bfd_false
 238     },
 239
 240        BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 241        BFD_JUMP_TABLE_COPY (_bfd_generic),
 242        BFD_JUMP_TABLE_CORE (netbsd),
 243        BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 244        BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 245        BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 246        BFD_JUMP_TABLE_WRITE (_bfd_generic),
 247        BFD_JUMP_TABLE_LINK (_bfd_nolink),
 248        BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 249
 250     (PTR) 0                     /* backend_data */
 251 };