bfd/hppabsd-core.c

   1 /* BFD back-end for HPPA BSD core files.
   2    Copyright 1993, 1994, 1995, 1998, 1999, 2001, 2002
   3    Free Software Foundation, Inc.
   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    Written by the Center for Software Science at the University of Utah
  22    and by Cygnus Support.
  23
  24    The core file structure for the Utah 4.3BSD and OSF1 ports on the
  25    PA is a mix between traditional cores and hpux cores -- just
  26    different enough that supporting this format would tend to add
  27    gross hacks to trad-core.c or hpux-core.c.  So instead we keep any
  28    gross hacks isolated to this file.  */
  29
  30 /* This file can only be compiled on systems which use HPPA-BSD style
  31    core files.
  32
  33    I would not expect this to be of use to any other host/target, but
  34    you never know.  */
  35
  36 #include "bfd.h"
  37 #include "sysdep.h"
  38 #include "libbfd.h"
  39
  40 #if defined (HOST_HPPABSD)
  41
  42 #include "machine/vmparam.h"
  43
  44 #include <sys/param.h>
  45 #include <sys/dir.h>
  46 #include <signal.h>
  47 #include <machine/reg.h>
  48 #include <sys/user.h>           /* After a.out.h  */
  49 #include <sys/file.h>
  50
  51 static asection *make_bfd_asection
  52   PARAMS ((bfd *, const char *, flagword, bfd_size_type, file_ptr,
  53            unsigned int));
  54 static const bfd_target *hppabsd_core_core_file_p
  55   PARAMS ((bfd *));
  56 static char *hppabsd_core_core_file_failing_command
  57   PARAMS ((bfd *));
  58 static int hppabsd_core_core_file_failing_signal
  59   PARAMS ((bfd *));
  60 static bfd_boolean hppabsd_core_core_file_matches_executable_p
  61   PARAMS ((bfd *, bfd *));
  62 static void swap_abort
  63   PARAMS ((void));
  64
  65 /* These are stored in the bfd's tdata.  */
  66
  67 struct hppabsd_core_struct
  68   {
  69     int sig;
  70     char cmd[MAXCOMLEN + 1];
  71     asection *data_section;
  72     asection *stack_section;
  73     asection *reg_section;
  74   };
  75
  76 #define core_hdr(bfd) ((bfd)->tdata.hppabsd_core_data)
  77 #define core_signal(bfd) (core_hdr(bfd)->sig)
  78 #define core_command(bfd) (core_hdr(bfd)->cmd)
  79 #define core_datasec(bfd) (core_hdr(bfd)->data_section)
  80 #define core_stacksec(bfd) (core_hdr(bfd)->stack_section)
  81 #define core_regsec(bfd) (core_hdr(bfd)->reg_section)
  82
  83 static asection *
  84 make_bfd_asection (abfd, name, flags, _raw_size, offset, alignment_power)
  85      bfd *abfd;
  86      const char *name;
  87      flagword flags;
  88      bfd_size_type _raw_size;
  89      file_ptr offset;
  90      unsigned int alignment_power;
  91 {
  92   asection *asect;
  93
  94   asect = bfd_make_section (abfd, name);
  95   if (!asect)
  96     return NULL;
  97
  98   asect->flags = flags;
  99   asect->_raw_size = _raw_size;
 100   asect->filepos = offset;
 101   asect->alignment_power = alignment_power;
 102
 103   return asect;
 104 }
 105
 106 static const bfd_target *
 107 hppabsd_core_core_file_p (abfd)
 108      bfd *abfd;
 109 {
 110   int val;
 111   struct user u;
 112   struct hppabsd_core_struct *coredata;
 113   int clicksz;
 114
 115   /* Try to read in the u-area.  We will need information from this
 116      to know how to grok the rest of the core structures.  */
 117   val = bfd_bread ((void *) &u, (bfd_size_type) sizeof u, abfd);
 118   if (val != sizeof u)
 119     {
 120       if (bfd_get_error () != bfd_error_system_call)
 121         bfd_set_error (bfd_error_wrong_format);
 122       return NULL;
 123     }
 124
 125   /* Get the page size out of the u structure.  This will be different
 126      for PA 1.0 machines and PA 1.1 machines.   Yuk!  */
 127   clicksz = u.u_pcb.pcb_pgsz;
 128
 129   /* clicksz must be a power of two >= 2k.  */
 130   if (clicksz < 0x800
 131       || clicksz != (clicksz & -clicksz))
 132     {
 133       bfd_set_error (bfd_error_wrong_format);
 134       return NULL;
 135     }
 136
 137   /* Sanity checks.  Make sure the size of the core file matches the
 138      the size computed from information within the core itself.  */
 139   {
 140     FILE *stream = bfd_cache_lookup (abfd);
 141     struct stat statbuf;
 142     if (stream == NULL || fstat (fileno (stream), &statbuf) < 0)
 143       {
 144         bfd_set_error (bfd_error_system_call);
 145         return NULL;
 146       }
 147     if (NBPG * (UPAGES + u.u_dsize + u.u_ssize) > statbuf.st_size)
 148       {
 149         bfd_set_error (bfd_error_file_truncated);
 150         return NULL;
 151       }
 152     if (clicksz * (UPAGES + u.u_dsize + u.u_ssize) < statbuf.st_size)
 153       {
 154         /* The file is too big.  Maybe it's not a core file
 155            or we otherwise have bad values for u_dsize and u_ssize).  */
 156         bfd_set_error (bfd_error_wrong_format);
 157         return NULL;
 158       }
 159   }
 160
 161   /* OK, we believe you.  You're a core file (sure, sure).  */
 162
 163   coredata = (struct hppabsd_core_struct *)
 164     bfd_zalloc (abfd, (bfd_size_type) sizeof (struct hppabsd_core_struct));
 165   if (!coredata)
 166     return NULL;
 167
 168   /* Make the core data and available via the tdata part of the BFD.  */
 169   abfd->tdata.hppabsd_core_data = coredata;
 170
 171   /* Create the sections.  */
 172   core_stacksec (abfd) = make_bfd_asection (abfd, ".stack",
 173                                            SEC_ALLOC + SEC_HAS_CONTENTS,
 174                                            clicksz * u.u_ssize,
 175                                            NBPG * (USIZE + KSTAKSIZE)
 176                                              + clicksz * u.u_dsize, 2);
 177   if (core_stacksec (abfd) == NULL)
 178     goto fail;
 179   core_stacksec (abfd)->vma = USRSTACK;
 180
 181   core_datasec (abfd) = make_bfd_asection (abfd, ".data",
 182                                           SEC_ALLOC + SEC_LOAD
 183                                             + SEC_HAS_CONTENTS,
 184                                           clicksz * u.u_dsize,
 185                                           NBPG * (USIZE + KSTAKSIZE), 2);
 186   if (core_datasec (abfd) == NULL)
 187     goto fail;
 188   core_datasec (abfd)->vma = UDATASEG;
 189
 190   core_regsec (abfd) = make_bfd_asection (abfd, ".reg",
 191                                          SEC_HAS_CONTENTS,
 192                                          KSTAKSIZE * NBPG,
 193                                          NBPG * USIZE, 2);
 194   if (core_regsec (abfd) == NULL)
 195     goto fail;
 196   core_regsec (abfd)->vma = 0;
 197
 198   strncpy (core_command (abfd), u.u_comm, MAXCOMLEN + 1);
 199   core_signal (abfd) = u.u_code;
 200   return abfd->xvec;
 201
 202  fail:
 203   bfd_release (abfd, abfd->tdata.any);
 204   abfd->tdata.any = NULL;
 205   bfd_section_list_clear (abfd);
 206   return NULL;
 207 }
 208
 209 static char *
 210 hppabsd_core_core_file_failing_command (abfd)
 211      bfd *abfd;
 212 {
 213   return core_command (abfd);
 214 }
 215
 216 /* ARGSUSED */
 217 static int
 218 hppabsd_core_core_file_failing_signal (abfd)
 219      bfd *abfd;
 220 {
 221   return core_signal (abfd);
 222 }
 223
 224 /* ARGSUSED */
 225 static bfd_boolean
 226 hppabsd_core_core_file_matches_executable_p (core_bfd, exec_bfd)
 227      bfd *core_bfd, *exec_bfd;
 228 {
 229   /* There's no way to know this...  */
 230   return TRUE;
 231 }
 232 \f
 233 /* If somebody calls any byte-swapping routines, shoot them.  */
 234 static void
 235 swap_abort ()
 236 {
 237   /* This way doesn't require any declaration for ANSI to fuck up.  */
 238   abort ();
 239 }
 240
 241 #define NO_GET  ((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )
 242 #define NO_PUT  ((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
 243 #define NO_SIGNED_GET \
 244   ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
 245
 246 const bfd_target hppabsd_core_vec =
 247   {
 248     "hppabsd-core",
 249     bfd_target_unknown_flavour,
 250     BFD_ENDIAN_BIG,             /* target byte order */
 251     BFD_ENDIAN_BIG,             /* target headers byte order */
 252     (HAS_RELOC | EXEC_P |       /* object flags */
 253      HAS_LINENO | HAS_DEBUG |
 254      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 255     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 256     0,                                                     /* symbol prefix */
 257     ' ',                                                   /* ar_pad_char */
 258     16,                                                    /* ar_max_namelen */
 259     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit data */
 260     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit data */
 261     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit data */
 262     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit hdrs */
 263     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit hdrs */
 264     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit hdrs */
 265
 266     {                           /* bfd_check_format */
 267      _bfd_dummy_target,         /* unknown format */
 268      _bfd_dummy_target,         /* object file */
 269      _bfd_dummy_target,         /* archive */
 270      hppabsd_core_core_file_p   /* a core file */
 271     },
 272     {                           /* bfd_set_format */
 273      bfd_false, bfd_false,
 274      bfd_false, bfd_false
 275     },
 276     {                           /* bfd_write_contents */
 277      bfd_false, bfd_false,
 278      bfd_false, bfd_false
 279     },
 280
 281     BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 282     BFD_JUMP_TABLE_COPY (_bfd_generic),
 283     BFD_JUMP_TABLE_CORE (hppabsd_core),
 284     BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 285     BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 286     BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 287     BFD_JUMP_TABLE_WRITE (_bfd_generic),
 288     BFD_JUMP_TABLE_LINK (_bfd_nolink),
 289     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 290
 291     NULL,
 292
 293     (PTR) 0                     /* backend_data */
 294 };
 295 #endif