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 PARAMS ((bfd *, const char *,
  52                                             flagword, bfd_size_type,
  53                                             file_ptr, unsigned int));
  54 static asymbol *hppabsd_core_make_empty_symbol PARAMS ((bfd *));
  55 static const bfd_target *hppabsd_core_core_file_p PARAMS ((bfd *));
  56 static char *hppabsd_core_core_file_failing_command PARAMS ((bfd *));
  57 static int hppabsd_core_core_file_failing_signal PARAMS ((bfd *));
  58 static boolean hppabsd_core_core_file_matches_executable_p
  59   PARAMS ((bfd *, bfd *));
  60 static void swap_abort PARAMS ((void));
  61
  62 /* These are stored in the bfd's tdata.  */
  63
  64 struct hppabsd_core_struct
  65   {
  66     int sig;
  67     char cmd[MAXCOMLEN + 1];
  68     asection *data_section;
  69     asection *stack_section;
  70     asection *reg_section;
  71   };
  72
  73 #define core_hdr(bfd) ((bfd)->tdata.hppabsd_core_data)
  74 #define core_signal(bfd) (core_hdr(bfd)->sig)
  75 #define core_command(bfd) (core_hdr(bfd)->cmd)
  76 #define core_datasec(bfd) (core_hdr(bfd)->data_section)
  77 #define core_stacksec(bfd) (core_hdr(bfd)->stack_section)
  78 #define core_regsec(bfd) (core_hdr(bfd)->reg_section)
  79
  80 static asection *
  81 make_bfd_asection (abfd, name, flags, _raw_size, offset, alignment_power)
  82      bfd *abfd;
  83      const char *name;
  84      flagword flags;
  85      bfd_size_type _raw_size;
  86      file_ptr offset;
  87      unsigned int alignment_power;
  88 {
  89   asection *asect;
  90
  91   asect = bfd_make_section (abfd, name);
  92   if (!asect)
  93     return NULL;
  94
  95   asect->flags = flags;
  96   asect->_raw_size = _raw_size;
  97   asect->filepos = offset;
  98   asect->alignment_power = alignment_power;
  99
 100   return asect;
 101 }
 102
 103 static asymbol *
 104 hppabsd_core_make_empty_symbol (abfd)
 105      bfd *abfd;
 106 {
 107   asymbol *new;
 108
 109   new = (asymbol *) bfd_zalloc (abfd, (bfd_size_type) sizeof (asymbol));
 110   if (new)
 111     new->the_bfd = abfd;
 112   return new;
 113 }
 114
 115 static const bfd_target *
 116 hppabsd_core_core_file_p (abfd)
 117      bfd *abfd;
 118 {
 119   int val;
 120   struct user u;
 121   struct hppabsd_core_struct *coredata;
 122   int clicksz;
 123
 124   /* Try to read in the u-area.  We will need information from this
 125      to know how to grok the rest of the core structures.  */
 126   val = bfd_bread ((void *) &u, (bfd_size_type) sizeof u, abfd);
 127   if (val != sizeof u)
 128     {
 129       if (bfd_get_error () != bfd_error_system_call)
 130         bfd_set_error (bfd_error_wrong_format);
 131       return NULL;
 132     }
 133
 134   /* Get the page size out of the u structure.  This will be different
 135      for PA 1.0 machines and PA 1.1 machines.   Yuk!  */
 136   clicksz = u.u_pcb.pcb_pgsz;
 137
 138   /* clicksz must be a power of two >= 2k.  */
 139   if (clicksz < 0x800
 140       || clicksz != (clicksz & -clicksz))
 141     {
 142       bfd_set_error (bfd_error_wrong_format);
 143       return NULL;
 144     }
 145
 146   /* Sanity checks.  Make sure the size of the core file matches the
 147      the size computed from information within the core itself.  */
 148   {
 149     FILE *stream = bfd_cache_lookup (abfd);
 150     struct stat statbuf;
 151     if (stream == NULL || fstat (fileno (stream), &statbuf) < 0)
 152       {
 153         bfd_set_error (bfd_error_system_call);
 154         return NULL;
 155       }
 156     if (NBPG * (UPAGES + u.u_dsize + u.u_ssize) > statbuf.st_size)
 157       {
 158         bfd_set_error (bfd_error_file_truncated);
 159         return NULL;
 160       }
 161     if (clicksz * (UPAGES + u.u_dsize + u.u_ssize) < statbuf.st_size)
 162       {
 163         /* The file is too big.  Maybe it's not a core file
 164            or we otherwise have bad values for u_dsize and u_ssize).  */
 165         bfd_set_error (bfd_error_wrong_format);
 166         return NULL;
 167       }
 168   }
 169
 170   /* OK, we believe you.  You're a core file (sure, sure).  */
 171
 172   coredata = (struct hppabsd_core_struct *)
 173     bfd_zalloc (abfd, (bfd_size_type) sizeof (struct hppabsd_core_struct));
 174   if (!coredata)
 175     return NULL;
 176
 177   /* Make the core data and available via the tdata part of the BFD.  */
 178   abfd->tdata.hppabsd_core_data = coredata;
 179
 180   /* Create the sections.  */
 181   core_stacksec (abfd) = make_bfd_asection (abfd, ".stack",
 182                                            SEC_ALLOC + SEC_HAS_CONTENTS,
 183                                            clicksz * u.u_ssize,
 184                                            NBPG * (USIZE + KSTAKSIZE)
 185                                              + clicksz * u.u_dsize, 2);
 186   if (core_stacksec (abfd) == NULL)
 187     goto fail;
 188   core_stacksec (abfd)->vma = USRSTACK;
 189
 190   core_datasec (abfd) = make_bfd_asection (abfd, ".data",
 191                                           SEC_ALLOC + SEC_LOAD
 192                                             + SEC_HAS_CONTENTS,
 193                                           clicksz * u.u_dsize,
 194                                           NBPG * (USIZE + KSTAKSIZE), 2);
 195   if (core_datasec (abfd) == NULL)
 196     goto fail;
 197   core_datasec (abfd)->vma = UDATASEG;
 198
 199   core_regsec (abfd) = make_bfd_asection (abfd, ".reg",
 200                                          SEC_HAS_CONTENTS,
 201                                          KSTAKSIZE * NBPG,
 202                                          NBPG * USIZE, 2);
 203   if (core_regsec (abfd) == NULL)
 204     goto fail;
 205   core_regsec (abfd)->vma = 0;
 206
 207   strncpy (core_command (abfd), u.u_comm, MAXCOMLEN + 1);
 208   core_signal (abfd) = u.u_code;
 209   return abfd->xvec;
 210
 211  fail:
 212   bfd_release (abfd, abfd->tdata.any);
 213   abfd->tdata.any = NULL;
 214   bfd_section_list_clear (abfd);
 215   return NULL;
 216 }
 217
 218 static char *
 219 hppabsd_core_core_file_failing_command (abfd)
 220      bfd *abfd;
 221 {
 222   return core_command (abfd);
 223 }
 224
 225 /* ARGSUSED */
 226 static int
 227 hppabsd_core_core_file_failing_signal (abfd)
 228      bfd *abfd;
 229 {
 230   return core_signal (abfd);
 231 }
 232
 233 /* ARGSUSED */
 234 static boolean
 235 hppabsd_core_core_file_matches_executable_p (core_bfd, exec_bfd)
 236      bfd *core_bfd, *exec_bfd;
 237 {
 238   /* There's no way to know this...  */
 239   return true;
 240 }
 241 \f
 242 #define hppabsd_core_get_symtab_upper_bound \
 243   _bfd_nosymbols_get_symtab_upper_bound
 244 #define hppabsd_core_get_symtab _bfd_nosymbols_get_symtab
 245 #define hppabsd_core_print_symbol _bfd_nosymbols_print_symbol
 246 #define hppabsd_core_get_symbol_info _bfd_nosymbols_get_symbol_info
 247 #define hppabsd_core_bfd_is_local_label_name \
 248   _bfd_nosymbols_bfd_is_local_label_name
 249 #define hppabsd_core_get_lineno _bfd_nosymbols_get_lineno
 250 #define hppabsd_core_find_nearest_line _bfd_nosymbols_find_nearest_line
 251 #define hppabsd_core_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
 252 #define hppabsd_core_read_minisymbols _bfd_nosymbols_read_minisymbols
 253 #define hppabsd_core_minisymbol_to_symbol _bfd_nosymbols_minisymbol_to_symbol
 254
 255 /* If somebody calls any byte-swapping routines, shoot them.  */
 256 static void
 257 swap_abort ()
 258 {
 259   /* This way doesn't require any declaration for ANSI to fuck up.  */
 260   abort ();
 261 }
 262
 263 #define NO_GET  ((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )
 264 #define NO_PUT  ((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
 265 #define NO_SIGNED_GET \
 266   ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
 267
 268 const bfd_target hppabsd_core_vec =
 269   {
 270     "hppabsd-core",
 271     bfd_target_unknown_flavour,
 272     BFD_ENDIAN_BIG,             /* target byte order */
 273     BFD_ENDIAN_BIG,             /* target headers byte order */
 274     (HAS_RELOC | EXEC_P |       /* object flags */
 275      HAS_LINENO | HAS_DEBUG |
 276      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 277     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 278     0,                                                     /* symbol prefix */
 279     ' ',                                                   /* ar_pad_char */
 280     16,                                                    /* ar_max_namelen */
 281     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit data */
 282     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit data */
 283     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit data */
 284     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit hdrs */
 285     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit hdrs */
 286     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit hdrs */
 287
 288     {                           /* bfd_check_format */
 289      _bfd_dummy_target,         /* unknown format */
 290      _bfd_dummy_target,         /* object file */
 291      _bfd_dummy_target,         /* archive */
 292      hppabsd_core_core_file_p   /* a core file */
 293     },
 294     {                           /* bfd_set_format */
 295      bfd_false, bfd_false,
 296      bfd_false, bfd_false
 297     },
 298     {                           /* bfd_write_contents */
 299      bfd_false, bfd_false,
 300      bfd_false, bfd_false
 301     },
 302
 303        BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 304        BFD_JUMP_TABLE_COPY (_bfd_generic),
 305        BFD_JUMP_TABLE_CORE (hppabsd_core),
 306        BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 307        BFD_JUMP_TABLE_SYMBOLS (hppabsd_core),
 308        BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 309        BFD_JUMP_TABLE_WRITE (_bfd_generic),
 310        BFD_JUMP_TABLE_LINK (_bfd_nolink),
 311        BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 312
 313     NULL,
 314
 315     (PTR) 0                     /* backend_data */
 316 };
 317 #endif