bfd/hppabsd-core.c

   1 /* BFD back-end for HPPA BSD core files.
   2    Copyright 1993, 1994, 1995, 1998, 1999, 2001, 2002, 2003, 2004
   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, 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 (abfd, name);
  95   if (!asect)
  96     return NULL;
  97
  98   asect->flags = flags;
  99   asect->size = 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
 143     if (fstat (fileno (stream), &statbuf) < 0)
 144       {
 145         bfd_set_error (bfd_error_system_call);
 146         return NULL;
 147       }
 148     if (NBPG * (UPAGES + u.u_dsize + u.u_ssize) > statbuf.st_size)
 149       {
 150         bfd_set_error (bfd_error_file_truncated);
 151         return NULL;
 152       }
 153     if (clicksz * (UPAGES + u.u_dsize + u.u_ssize) < statbuf.st_size)
 154       {
 155         /* The file is too big.  Maybe it's not a core file
 156            or we otherwise have bad values for u_dsize and u_ssize).  */
 157         bfd_set_error (bfd_error_wrong_format);
 158         return NULL;
 159       }
 160   }
 161
 162   /* OK, we believe you.  You're a core file (sure, sure).  */
 163
 164   coredata = (struct hppabsd_core_struct *)
 165     bfd_zalloc (abfd, (bfd_size_type) sizeof (struct hppabsd_core_struct));
 166   if (!coredata)
 167     return NULL;
 168
 169   /* Make the core data and available via the tdata part of the BFD.  */
 170   abfd->tdata.hppabsd_core_data = coredata;
 171
 172   /* Create the sections.  */
 173   core_stacksec (abfd) = make_bfd_asection (abfd, ".stack",
 174                                            SEC_ALLOC + SEC_HAS_CONTENTS,
 175                                            clicksz * u.u_ssize,
 176                                            NBPG * (USIZE + KSTAKSIZE)
 177                                              + clicksz * u.u_dsize, 2);
 178   if (core_stacksec (abfd) == NULL)
 179     goto fail;
 180   core_stacksec (abfd)->vma = USRSTACK;
 181
 182   core_datasec (abfd) = make_bfd_asection (abfd, ".data",
 183                                           SEC_ALLOC + SEC_LOAD
 184                                             + SEC_HAS_CONTENTS,
 185                                           clicksz * u.u_dsize,
 186                                           NBPG * (USIZE + KSTAKSIZE), 2);
 187   if (core_datasec (abfd) == NULL)
 188     goto fail;
 189   core_datasec (abfd)->vma = UDATASEG;
 190
 191   core_regsec (abfd) = make_bfd_asection (abfd, ".reg",
 192                                          SEC_HAS_CONTENTS,
 193                                          KSTAKSIZE * NBPG,
 194                                          NBPG * USIZE, 2);
 195   if (core_regsec (abfd) == NULL)
 196     goto fail;
 197   core_regsec (abfd)->vma = 0;
 198
 199   strncpy (core_command (abfd), u.u_comm, MAXCOMLEN + 1);
 200   core_signal (abfd) = u.u_code;
 201   return abfd->xvec;
 202
 203  fail:
 204   bfd_release (abfd, abfd->tdata.any);
 205   abfd->tdata.any = NULL;
 206   bfd_section_list_clear (abfd);
 207   return NULL;
 208 }
 209
 210 static char *
 211 hppabsd_core_core_file_failing_command (abfd)
 212      bfd *abfd;
 213 {
 214   return core_command (abfd);
 215 }
 216
 217 static int
 218 hppabsd_core_core_file_failing_signal (abfd)
 219      bfd *abfd;
 220 {
 221   return core_signal (abfd);
 222 }
 223
 224 static bfd_boolean
 225 hppabsd_core_core_file_matches_executable_p (core_bfd, exec_bfd)
 226      bfd *core_bfd, *exec_bfd;
 227 {
 228   /* There's no way to know this...  */
 229   return TRUE;
 230 }
 231 \f
 232 /* If somebody calls any byte-swapping routines, shoot them.  */
 233 static void
 234 swap_abort ()
 235 {
 236   /* This way doesn't require any declaration for ANSI to fuck up.  */
 237   abort ();
 238 }
 239
 240 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
 241 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
 242 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
 243 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
 244 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
 245 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
 246
 247 const bfd_target hppabsd_core_vec =
 248   {
 249     "hppabsd-core",
 250     bfd_target_unknown_flavour,
 251     BFD_ENDIAN_BIG,             /* target byte order */
 252     BFD_ENDIAN_BIG,             /* target headers byte order */
 253     (HAS_RELOC | EXEC_P |       /* object flags */
 254      HAS_LINENO | HAS_DEBUG |
 255      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 256     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 257     0,                                                     /* symbol prefix */
 258     ' ',                                                   /* ar_pad_char */
 259     16,                                                    /* ar_max_namelen */
 260     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit data */
 261     NO_GET, NO_GETS, NO_PUT,            /* 32 bit data */
 262     NO_GET, NO_GETS, NO_PUT,            /* 16 bit data */
 263     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit hdrs */
 264     NO_GET, NO_GETS, NO_PUT,            /* 32 bit hdrs */
 265     NO_GET, NO_GETS, NO_PUT,            /* 16 bit hdrs */
 266
 267     {                           /* bfd_check_format */
 268       _bfd_dummy_target,                /* unknown format */
 269       _bfd_dummy_target,                /* object file */
 270       _bfd_dummy_target,                /* archive */
 271       hppabsd_core_core_file_p          /* a core file */
 272     },
 273     {                           /* bfd_set_format */
 274       bfd_false, bfd_false,
 275       bfd_false, bfd_false
 276     },
 277     {                           /* bfd_write_contents */
 278       bfd_false, bfd_false,
 279       bfd_false, bfd_false
 280     },
 281
 282     BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 283     BFD_JUMP_TABLE_COPY (_bfd_generic),
 284     BFD_JUMP_TABLE_CORE (hppabsd_core),
 285     BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 286     BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 287     BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 288     BFD_JUMP_TABLE_WRITE (_bfd_generic),
 289     BFD_JUMP_TABLE_LINK (_bfd_nolink),
 290     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 291
 292     NULL,
 293
 294     (PTR) 0                     /* backend_data */
 295   };
 296 #endif