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    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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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     struct stat statbuf;
 141
 142     if (bfd_stat (abfd, &statbuf) < 0)
 143       return NULL;
 144
 145     if (NBPG * (UPAGES + u.u_dsize + u.u_ssize) > statbuf.st_size)
 146       {
 147         bfd_set_error (bfd_error_file_truncated);
 148         return NULL;
 149       }
 150     if (clicksz * (UPAGES + u.u_dsize + u.u_ssize) < statbuf.st_size)
 151       {
 152         /* The file is too big.  Maybe it's not a core file
 153            or we otherwise have bad values for u_dsize and u_ssize).  */
 154         bfd_set_error (bfd_error_wrong_format);
 155         return NULL;
 156       }
 157   }
 158
 159   /* OK, we believe you.  You're a core file (sure, sure).  */
 160
 161   coredata = (struct hppabsd_core_struct *)
 162     bfd_zalloc (abfd, (bfd_size_type) sizeof (struct hppabsd_core_struct));
 163   if (!coredata)
 164     return NULL;
 165
 166   /* Make the core data and available via the tdata part of the BFD.  */
 167   abfd->tdata.hppabsd_core_data = coredata;
 168
 169   /* Create the sections.  */
 170   core_stacksec (abfd) = make_bfd_asection (abfd, ".stack",
 171                                            SEC_ALLOC + SEC_HAS_CONTENTS,
 172                                            clicksz * u.u_ssize,
 173                                            NBPG * (USIZE + KSTAKSIZE)
 174                                              + clicksz * u.u_dsize, 2);
 175   if (core_stacksec (abfd) == NULL)
 176     goto fail;
 177   core_stacksec (abfd)->vma = USRSTACK;
 178
 179   core_datasec (abfd) = make_bfd_asection (abfd, ".data",
 180                                           SEC_ALLOC + SEC_LOAD
 181                                             + SEC_HAS_CONTENTS,
 182                                           clicksz * u.u_dsize,
 183                                           NBPG * (USIZE + KSTAKSIZE), 2);
 184   if (core_datasec (abfd) == NULL)
 185     goto fail;
 186   core_datasec (abfd)->vma = UDATASEG;
 187
 188   core_regsec (abfd) = make_bfd_asection (abfd, ".reg",
 189                                          SEC_HAS_CONTENTS,
 190                                          KSTAKSIZE * NBPG,
 191                                          NBPG * USIZE, 2);
 192   if (core_regsec (abfd) == NULL)
 193     goto fail;
 194   core_regsec (abfd)->vma = 0;
 195
 196   strncpy (core_command (abfd), u.u_comm, MAXCOMLEN + 1);
 197   core_signal (abfd) = u.u_code;
 198   return abfd->xvec;
 199
 200  fail:
 201   bfd_release (abfd, abfd->tdata.any);
 202   abfd->tdata.any = NULL;
 203   bfd_section_list_clear (abfd);
 204   return NULL;
 205 }
 206
 207 static char *
 208 hppabsd_core_core_file_failing_command (abfd)
 209      bfd *abfd;
 210 {
 211   return core_command (abfd);
 212 }
 213
 214 static int
 215 hppabsd_core_core_file_failing_signal (abfd)
 216      bfd *abfd;
 217 {
 218   return core_signal (abfd);
 219 }
 220
 221 static bfd_boolean
 222 hppabsd_core_core_file_matches_executable_p (core_bfd, exec_bfd)
 223      bfd *core_bfd, *exec_bfd;
 224 {
 225   /* There's no way to know this...  */
 226   return TRUE;
 227 }
 228 \f
 229 /* If somebody calls any byte-swapping routines, shoot them.  */
 230 static void
 231 swap_abort ()
 232 {
 233   /* This way doesn't require any declaration for ANSI to fuck up.  */
 234   abort ();
 235 }
 236
 237 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
 238 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
 239 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
 240 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
 241 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
 242 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
 243
 244 const bfd_target hppabsd_core_vec =
 245   {
 246     "hppabsd-core",
 247     bfd_target_unknown_flavour,
 248     BFD_ENDIAN_BIG,             /* target byte order */
 249     BFD_ENDIAN_BIG,             /* target headers byte order */
 250     (HAS_RELOC | EXEC_P |       /* object flags */
 251      HAS_LINENO | HAS_DEBUG |
 252      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 253     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 254     0,                                                     /* symbol prefix */
 255     ' ',                                                   /* ar_pad_char */
 256     16,                                                    /* ar_max_namelen */
 257     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit data */
 258     NO_GET, NO_GETS, NO_PUT,            /* 32 bit data */
 259     NO_GET, NO_GETS, NO_PUT,            /* 16 bit data */
 260     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit hdrs */
 261     NO_GET, NO_GETS, NO_PUT,            /* 32 bit hdrs */
 262     NO_GET, NO_GETS, NO_PUT,            /* 16 bit hdrs */
 263
 264     {                           /* bfd_check_format */
 265       _bfd_dummy_target,                /* unknown format */
 266       _bfd_dummy_target,                /* object file */
 267       _bfd_dummy_target,                /* archive */
 268       hppabsd_core_core_file_p          /* a core file */
 269     },
 270     {                           /* bfd_set_format */
 271       bfd_false, bfd_false,
 272       bfd_false, bfd_false
 273     },
 274     {                           /* bfd_write_contents */
 275       bfd_false, bfd_false,
 276       bfd_false, bfd_false
 277     },
 278
 279     BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 280     BFD_JUMP_TABLE_COPY (_bfd_generic),
 281     BFD_JUMP_TABLE_CORE (hppabsd_core),
 282     BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 283     BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 284     BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 285     BFD_JUMP_TABLE_WRITE (_bfd_generic),
 286     BFD_JUMP_TABLE_LINK (_bfd_nolink),
 287     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 288
 289     NULL,
 290
 291     (PTR) 0                     /* backend_data */
 292   };
 293 #endif