bfd/hppabsd-core.c

   1 /* BFD back-end for HPPA BSD core files.
   2    Copyright 1993, 1994, 1995, 1998, 1999, 2001, 2002, 2003, 2004, 2005,
   3    2006, 2007 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.
  21
  22    Written by the Center for Software Science at the University of Utah
  23    and by Cygnus Support.
  24
  25    The core file structure for the Utah 4.3BSD and OSF1 ports on the
  26    PA is a mix between traditional cores and hpux cores -- just
  27    different enough that supporting this format would tend to add
  28    gross hacks to trad-core.c or hpux-core.c.  So instead we keep any
  29    gross hacks isolated to this file.  */
  30
  31 /* This file can only be compiled on systems which use HPPA-BSD style
  32    core files.
  33
  34    I would not expect this to be of use to any other host/target, but
  35    you never know.  */
  36
  37 #include "sysdep.h"
  38 #include "bfd.h"
  39 #include "libbfd.h"
  40
  41 #if defined (HOST_HPPABSD)
  42
  43 #include "machine/vmparam.h"
  44
  45 #include <sys/param.h>
  46 #include <sys/dir.h>
  47 #include <signal.h>
  48 #include <machine/reg.h>
  49 #include <sys/user.h>           /* After a.out.h  */
  50 #include <sys/file.h>
  51
  52 static asection *make_bfd_asection
  53   PARAMS ((bfd *, const char *, flagword, bfd_size_type, file_ptr,
  54            unsigned int));
  55 static const bfd_target *hppabsd_core_core_file_p
  56   PARAMS ((bfd *));
  57 static char *hppabsd_core_core_file_failing_command
  58   PARAMS ((bfd *));
  59 static int hppabsd_core_core_file_failing_signal
  60   PARAMS ((bfd *));
  61 #define hppabsd_core_core_file_matches_executable_p generic_core_file_matches_executable_p
  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, size, offset, alignment_power)
  85      bfd *abfd;
  86      const char *name;
  87      flagword flags;
  88      bfd_size_type size;
  89      file_ptr offset;
  90      unsigned int alignment_power;
  91 {
  92   asection *asect;
  93
  94   asect = bfd_make_section_with_flags (abfd, name, flags);
  95   if (!asect)
  96     return NULL;
  97
  98   asect->size = size;
  99   asect->filepos = offset;
 100   asect->alignment_power = alignment_power;
 101
 102   return asect;
 103 }
 104
 105 static const bfd_target *
 106 hppabsd_core_core_file_p (abfd)
 107      bfd *abfd;
 108 {
 109   int val;
 110   struct user u;
 111   struct hppabsd_core_struct *coredata;
 112   int clicksz;
 113
 114   /* Try to read in the u-area.  We will need information from this
 115      to know how to grok the rest of the core structures.  */
 116   val = bfd_bread ((void *) &u, (bfd_size_type) sizeof u, abfd);
 117   if (val != sizeof u)
 118     {
 119       if (bfd_get_error () != bfd_error_system_call)
 120         bfd_set_error (bfd_error_wrong_format);
 121       return NULL;
 122     }
 123
 124   /* Get the page size out of the u structure.  This will be different
 125      for PA 1.0 machines and PA 1.1 machines.   Yuk!  */
 126   clicksz = u.u_pcb.pcb_pgsz;
 127
 128   /* clicksz must be a power of two >= 2k.  */
 129   if (clicksz < 0x800
 130       || clicksz != (clicksz & -clicksz))
 131     {
 132       bfd_set_error (bfd_error_wrong_format);
 133       return NULL;
 134     }
 135
 136   /* Sanity checks.  Make sure the size of the core file matches the
 137      the size computed from information within the core itself.  */
 138   {
 139     struct stat statbuf;
 140
 141     if (bfd_stat (abfd, &statbuf) < 0)
 142       return NULL;
 143
 144     if (NBPG * (UPAGES + u.u_dsize + u.u_ssize) > statbuf.st_size)
 145       {
 146         bfd_set_error (bfd_error_file_truncated);
 147         return NULL;
 148       }
 149     if (clicksz * (UPAGES + u.u_dsize + u.u_ssize) < statbuf.st_size)
 150       {
 151         /* The file is too big.  Maybe it's not a core file
 152            or we otherwise have bad values for u_dsize and u_ssize).  */
 153         bfd_set_error (bfd_error_wrong_format);
 154         return NULL;
 155       }
 156   }
 157
 158   /* OK, we believe you.  You're a core file (sure, sure).  */
 159
 160   coredata = (struct hppabsd_core_struct *)
 161     bfd_zalloc (abfd, (bfd_size_type) sizeof (struct hppabsd_core_struct));
 162   if (!coredata)
 163     return NULL;
 164
 165   /* Make the core data and available via the tdata part of the BFD.  */
 166   abfd->tdata.hppabsd_core_data = coredata;
 167
 168   /* Create the sections.  */
 169   core_stacksec (abfd) = make_bfd_asection (abfd, ".stack",
 170                                            SEC_ALLOC + SEC_HAS_CONTENTS,
 171                                            clicksz * u.u_ssize,
 172                                            NBPG * (USIZE + KSTAKSIZE)
 173                                              + clicksz * u.u_dsize, 2);
 174   if (core_stacksec (abfd) == NULL)
 175     goto fail;
 176   core_stacksec (abfd)->vma = USRSTACK;
 177
 178   core_datasec (abfd) = make_bfd_asection (abfd, ".data",
 179                                           SEC_ALLOC + SEC_LOAD
 180                                             + SEC_HAS_CONTENTS,
 181                                           clicksz * u.u_dsize,
 182                                           NBPG * (USIZE + KSTAKSIZE), 2);
 183   if (core_datasec (abfd) == NULL)
 184     goto fail;
 185   core_datasec (abfd)->vma = UDATASEG;
 186
 187   core_regsec (abfd) = make_bfd_asection (abfd, ".reg",
 188                                          SEC_HAS_CONTENTS,
 189                                          KSTAKSIZE * NBPG,
 190                                          NBPG * USIZE, 2);
 191   if (core_regsec (abfd) == NULL)
 192     goto fail;
 193   core_regsec (abfd)->vma = 0;
 194
 195   strncpy (core_command (abfd), u.u_comm, MAXCOMLEN + 1);
 196   core_signal (abfd) = u.u_code;
 197   return abfd->xvec;
 198
 199  fail:
 200   bfd_release (abfd, abfd->tdata.any);
 201   abfd->tdata.any = NULL;
 202   bfd_section_list_clear (abfd);
 203   return NULL;
 204 }
 205
 206 static char *
 207 hppabsd_core_core_file_failing_command (abfd)
 208      bfd *abfd;
 209 {
 210   return core_command (abfd);
 211 }
 212
 213 static int
 214 hppabsd_core_core_file_failing_signal (abfd)
 215      bfd *abfd;
 216 {
 217   return core_signal (abfd);
 218 }
 219 \f
 220 /* If somebody calls any byte-swapping routines, shoot them.  */
 221 static void
 222 swap_abort ()
 223 {
 224   /* This way doesn't require any declaration for ANSI to fuck up.  */
 225   abort ();
 226 }
 227
 228 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
 229 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
 230 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
 231 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
 232 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
 233 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
 234
 235 const bfd_target hppabsd_core_vec =
 236   {
 237     "hppabsd-core",
 238     bfd_target_unknown_flavour,
 239     BFD_ENDIAN_BIG,             /* target byte order */
 240     BFD_ENDIAN_BIG,             /* target headers byte order */
 241     (HAS_RELOC | EXEC_P |       /* object flags */
 242      HAS_LINENO | HAS_DEBUG |
 243      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 244     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 245     0,                                                     /* symbol prefix */
 246     ' ',                                                   /* ar_pad_char */
 247     16,                                                    /* ar_max_namelen */
 248     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit data */
 249     NO_GET, NO_GETS, NO_PUT,            /* 32 bit data */
 250     NO_GET, NO_GETS, NO_PUT,            /* 16 bit data */
 251     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit hdrs */
 252     NO_GET, NO_GETS, NO_PUT,            /* 32 bit hdrs */
 253     NO_GET, NO_GETS, NO_PUT,            /* 16 bit hdrs */
 254
 255     {                           /* bfd_check_format */
 256       _bfd_dummy_target,                /* unknown format */
 257       _bfd_dummy_target,                /* object file */
 258       _bfd_dummy_target,                /* archive */
 259       hppabsd_core_core_file_p          /* a core file */
 260     },
 261     {                           /* bfd_set_format */
 262       bfd_false, bfd_false,
 263       bfd_false, bfd_false
 264     },
 265     {                           /* bfd_write_contents */
 266       bfd_false, bfd_false,
 267       bfd_false, bfd_false
 268     },
 269
 270     BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 271     BFD_JUMP_TABLE_COPY (_bfd_generic),
 272     BFD_JUMP_TABLE_CORE (hppabsd_core),
 273     BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 274     BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 275     BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 276     BFD_JUMP_TABLE_WRITE (_bfd_generic),
 277     BFD_JUMP_TABLE_LINK (_bfd_nolink),
 278     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 279
 280     NULL,
 281
 282     (PTR) 0                     /* backend_data */
 283   };
 284 #endif