toolchain/binutils/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, 2003, 2004
   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 /* Offset of StackGhost cookie within `struct md_coredump' on
  38    OpenBSD/sparc.  */
  39 #define CORE_WCOOKIE_OFFSET     344
  40
  41 struct netbsd_core_struct {
  42         struct core core;
  43 } *rawptr;
  44
  45 /* forward declarations */
  46
  47 static const bfd_target *netbsd_core_file_p
  48   PARAMS ((bfd *abfd));
  49 static char *netbsd_core_file_failing_command
  50   PARAMS ((bfd *abfd));
  51 static int netbsd_core_file_failing_signal
  52   PARAMS ((bfd *abfd));
  53 static bfd_boolean netbsd_core_file_matches_executable_p
  54   PARAMS ((bfd *core_bfd, bfd *exec_bfd));
  55 static void swap_abort
  56   PARAMS ((void));
  57
  58 /* Handle NetBSD-style core dump file.  */
  59
  60 static const bfd_target *
  61 netbsd_core_file_p (abfd)
  62      bfd *abfd;
  63
  64 {
  65   int i, val;
  66   file_ptr offset;
  67   asection *asect, *asect2;
  68   struct core core;
  69   struct coreseg coreseg;
  70   bfd_size_type amt = sizeof core;
  71
  72   val = bfd_bread ((void *) &core, amt, abfd);
  73   if (val != sizeof core)
  74     {
  75       /* Too small to be a core file */
  76       bfd_set_error (bfd_error_wrong_format);
  77       return 0;
  78     }
  79
  80   if (CORE_GETMAGIC (core) != COREMAGIC)
  81     {
  82       bfd_set_error (bfd_error_wrong_format);
  83       return 0;
  84     }
  85
  86   amt = sizeof (struct netbsd_core_struct);
  87   rawptr = (struct netbsd_core_struct *) bfd_zalloc (abfd, amt);
  88   if (rawptr == NULL)
  89     return 0;
  90
  91   rawptr->core = core;
  92   abfd->tdata.netbsd_core_data = rawptr;
  93
  94   offset = core.c_hdrsize;
  95   for (i = 0; i < core.c_nseg; i++)
  96     {
  97       const char *sname;
  98       flagword flags;
  99
 100       if (bfd_seek (abfd, offset, SEEK_SET) != 0)
 101         goto punt;
 102
 103       val = bfd_bread ((void *) &coreseg, (bfd_size_type) sizeof coreseg, abfd);
 104       if (val != sizeof coreseg)
 105         {
 106           bfd_set_error (bfd_error_file_truncated);
 107           goto punt;
 108         }
 109       if (CORE_GETMAGIC (coreseg) != CORESEGMAGIC)
 110         {
 111           bfd_set_error (bfd_error_wrong_format);
 112           goto punt;
 113         }
 114
 115       offset += core.c_seghdrsize;
 116
 117       switch (CORE_GETFLAG (coreseg))
 118         {
 119         case CORE_CPU:
 120           sname = ".reg";
 121           flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 122           break;
 123         case CORE_DATA:
 124           sname = ".data";
 125           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 126           break;
 127         case CORE_STACK:
 128           sname = ".stack";
 129           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 130           break;
 131         default:
 132           sname = ".unknown";
 133           flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 134           break;
 135         }
 136       asect = bfd_make_section_anyway (abfd, sname);
 137       if (asect == NULL)
 138         goto punt;
 139
 140       asect->flags = flags;
 141       asect->_raw_size = coreseg.c_size;
 142       asect->vma = coreseg.c_addr;
 143       asect->filepos = offset;
 144       asect->alignment_power = 2;
 145
 146       if (CORE_GETMID (core) == M_SPARC_NETBSD
 147           && CORE_GETFLAG (coreseg) == CORE_CPU
 148           && coreseg.c_size > CORE_WCOOKIE_OFFSET)
 149         {
 150           /* Truncate the .reg section.  */
 151           asect->_raw_size = CORE_WCOOKIE_OFFSET;
 152
 153           /* And create the .wcookie section.  */
 154           asect = bfd_make_section_anyway (abfd, ".wcookie");
 155           if (asect == NULL)
 156             goto punt;
 157
 158           asect->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 159           asect->_raw_size = 4;
 160           asect->vma = 0;
 161           asect->filepos = offset + CORE_WCOOKIE_OFFSET;
 162           asect->alignment_power = 2;
 163         }
 164
 165       offset += coreseg.c_size;
 166
 167 #ifdef CORE_FPU_OFFSET
 168       switch (CORE_GETFLAG (coreseg))
 169         {
 170         case CORE_CPU:
 171           /* Hackish...  */
 172           asect->_raw_size = CORE_FPU_OFFSET;
 173           asect2 = bfd_make_section_anyway (abfd, ".reg2");
 174           if (asect2 == NULL)
 175             goto punt;
 176           asect2->_raw_size = coreseg.c_size - CORE_FPU_OFFSET;
 177           asect2->vma = 0;
 178           asect2->filepos = asect->filepos + CORE_FPU_OFFSET;
 179           asect2->alignment_power = 2;
 180           asect2->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 181           break;
 182         }
 183 #endif
 184     }
 185
 186   /* OK, we believe you.  You're a core file (sure, sure).  */
 187   return abfd->xvec;
 188
 189  punt:
 190   bfd_release (abfd, abfd->tdata.any);
 191   abfd->tdata.any = NULL;
 192   bfd_section_list_clear (abfd);
 193   return 0;
 194 }
 195
 196 static char*
 197 netbsd_core_file_failing_command (abfd)
 198         bfd *abfd;
 199 {
 200  /*return core_command (abfd);*/
 201   return abfd->tdata.netbsd_core_data->core.c_name;
 202 }
 203
 204 static int
 205 netbsd_core_file_failing_signal (abfd)
 206         bfd *abfd;
 207 {
 208   /*return core_signal (abfd);*/
 209   return abfd->tdata.netbsd_core_data->core.c_signo;
 210 }
 211
 212 static bfd_boolean
 213 netbsd_core_file_matches_executable_p  (core_bfd, exec_bfd)
 214      bfd *core_bfd ATTRIBUTE_UNUSED;
 215      bfd *exec_bfd ATTRIBUTE_UNUSED;
 216 {
 217   return TRUE;          /* FIXME, We have no way of telling at this point */
 218 }
 219 \f
 220 /* If somebody calls any byte-swapping routines, shoot them.  */
 221 static void
 222 swap_abort ()
 223 {
 224   abort (); /* This way doesn't require any declaration for ANSI to fuck up */
 225 }
 226
 227 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
 228 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
 229 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
 230 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
 231 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
 232 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
 233
 234 const bfd_target netbsd_core_vec =
 235   {
 236     "netbsd-core",
 237     bfd_target_unknown_flavour,
 238     BFD_ENDIAN_UNKNOWN,         /* target byte order */
 239     BFD_ENDIAN_UNKNOWN,         /* target headers byte order */
 240     (HAS_RELOC | EXEC_P |       /* object flags */
 241      HAS_LINENO | HAS_DEBUG |
 242      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 243     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 244     0,                                                     /* symbol prefix */
 245     ' ',                                                   /* ar_pad_char */
 246     16,                                                    /* ar_max_namelen */
 247     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit data.  */
 248     NO_GET, NO_GETS, NO_PUT,            /* 32 bit data.  */
 249     NO_GET, NO_GETS, NO_PUT,            /* 16 bit data.  */
 250     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit hdrs.  */
 251     NO_GET, NO_GETS, NO_PUT,            /* 32 bit hdrs.  */
 252     NO_GET, NO_GETS, NO_PUT,            /* 16 bit hdrs.  */
 253
 254     {                           /* bfd_check_format */
 255       _bfd_dummy_target,                /* unknown format */
 256       _bfd_dummy_target,                /* object file */
 257       _bfd_dummy_target,                /* archive */
 258       netbsd_core_file_p                /* a core file */
 259     },
 260     {                           /* bfd_set_format */
 261       bfd_false, bfd_false,
 262       bfd_false, bfd_false
 263     },
 264     {                           /* bfd_write_contents */
 265       bfd_false, bfd_false,
 266       bfd_false, bfd_false
 267     },
 268
 269     BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 270     BFD_JUMP_TABLE_COPY (_bfd_generic),
 271     BFD_JUMP_TABLE_CORE (netbsd),
 272     BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 273     BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 274     BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 275     BFD_JUMP_TABLE_WRITE (_bfd_generic),
 276     BFD_JUMP_TABLE_LINK (_bfd_nolink),
 277     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 278
 279     NULL,
 280
 281     (PTR) 0                     /* backend_data */
 282   };