bfd/hppabsd-core.c

   1 /* BFD back-end for HPPA BSD core files.
   2    Copyright 1993, 1994 Free Software Foundation, Inc.
   3
   4    This file is part of BFD, the Binary File Descriptor library.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19
  20    Written by the Center for Software Science at the University of Utah
  21    and by Cygnus Support.
  22
  23    The core file structure for the Utah 4.3BSD and OSF1 ports on the
  24    PA is a mix between traditional cores and hpux cores -- just
  25    different enough that supporting this format would tend to add
  26    gross hacks to trad-core.c or hpux-core.c.  So instead we keep any
  27    gross hacks isolated to this file.  */
  28
  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 <stdio.h>
  45 #include <sys/types.h>
  46 #include <sys/param.h>
  47 #include <sys/dir.h>
  48 #include <signal.h>
  49 #include <machine/reg.h>
  50 #include <sys/user.h>           /* After a.out.h  */
  51 #include <sys/file.h>
  52 #include <errno.h>
  53
  54 static asection *make_bfd_asection PARAMS ((bfd *, CONST char *,
  55                                             flagword, bfd_size_type,
  56                                             file_ptr, unsigned int));
  57 static asymbol *hppabsd_core_make_empty_symbol PARAMS ((bfd *));
  58 static const bfd_target *hppabsd_core_core_file_p PARAMS ((bfd *));
  59 static char *hppabsd_core_core_file_failing_command PARAMS ((bfd *));
  60 static int hppabsd_core_core_file_failing_signal PARAMS ((bfd *));
  61 static boolean hppabsd_core_core_file_matches_executable_p
  62   PARAMS ((bfd *, bfd *));
  63 static void swap_abort 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 asymbol *
 107 hppabsd_core_make_empty_symbol (abfd)
 108      bfd *abfd;
 109 {
 110   asymbol *new = (asymbol *) bfd_zalloc (abfd, sizeof (asymbol));
 111   if (new)
 112     new->the_bfd = abfd;
 113   return new;
 114 }
 115
 116 static const bfd_target *
 117 hppabsd_core_core_file_p (abfd)
 118      bfd *abfd;
 119 {
 120   int val;
 121   struct user u;
 122   struct hppabsd_core_struct *coredata;
 123   int clicksz;
 124
 125   /* Try to read in the u-area.  We will need information from this
 126      to know how to grok the rest of the core structures.  */
 127   val = bfd_read ((void *) &u, 1, sizeof u, abfd);
 128   if (val != sizeof u)
 129     {
 130       if (bfd_get_error () != bfd_error_system_call)
 131         bfd_set_error (bfd_error_wrong_format);
 132       return NULL;
 133     }
 134
 135   /* Get the page size out of the u structure.  This will be different
 136      for PA 1.0 machines and PA 1.1 machines.   Yuk!  */
 137   clicksz = u.u_pcb.pcb_pgsz;
 138
 139   /* clicksz must be a power of two >= 2k.  */
 140   if (clicksz < 0x800
 141       || clicksz != (clicksz & -clicksz))
 142     {
 143       bfd_set_error (bfd_error_wrong_format);
 144       return NULL;
 145     }
 146
 147
 148   /* Sanity checks.  Make sure the size of the core file matches the
 149      the size computed from information within the core itself.  */
 150   {
 151     FILE *stream = bfd_cache_lookup (abfd);
 152     struct stat statbuf;
 153     if (stream == NULL || fstat (fileno (stream), &statbuf) < 0)
 154       {
 155         bfd_set_error (bfd_error_system_call);
 156         return NULL;
 157       }
 158     if (NBPG * (UPAGES + u.u_dsize + u.u_ssize) > statbuf.st_size)
 159       {
 160         bfd_set_error (bfd_error_file_truncated);
 161         return NULL;
 162       }
 163     if (clicksz * (UPAGES + u.u_dsize + u.u_ssize) < statbuf.st_size)
 164       {
 165         /* The file is too big.  Maybe it's not a core file
 166            or we otherwise have bad values for u_dsize and u_ssize).  */
 167         bfd_set_error (bfd_error_wrong_format);
 168         return NULL;
 169       }
 170   }
 171
 172   /* OK, we believe you.  You're a core file (sure, sure).  */
 173
 174   coredata = (struct hppabsd_core_struct *)
 175     bfd_zalloc (abfd, sizeof (struct hppabsd_core_struct));
 176   if (!coredata)
 177     return NULL;
 178
 179   /* Make the core data and available via the tdata part of the BFD.  */
 180   abfd->tdata.hppabsd_core_data = coredata;
 181
 182   /* Create the sections.  */
 183   core_stacksec (abfd) = make_bfd_asection (abfd, ".stack",
 184                                            SEC_ALLOC + SEC_HAS_CONTENTS,
 185                                            clicksz * u.u_ssize,
 186                                            NBPG * (USIZE + KSTAKSIZE)
 187                                              + clicksz * u.u_dsize, 2);
 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   core_datasec (abfd)->vma = UDATASEG;
 196
 197   core_regsec (abfd) = make_bfd_asection (abfd, ".reg",
 198                                          SEC_HAS_CONTENTS,
 199                                          KSTAKSIZE * NBPG,
 200                                          NBPG * USIZE, 2);
 201   core_regsec (abfd)->vma = 0;
 202
 203   strncpy (core_command (abfd), u.u_comm, MAXCOMLEN + 1);
 204   core_signal (abfd) = u.u_code;
 205   return abfd->xvec;
 206 }
 207
 208 static char *
 209 hppabsd_core_core_file_failing_command (abfd)
 210      bfd *abfd;
 211 {
 212   return core_command (abfd);
 213 }
 214
 215 /* ARGSUSED */
 216 static int
 217 hppabsd_core_core_file_failing_signal (abfd)
 218      bfd *abfd;
 219 {
 220   return core_signal (abfd);
 221 }
 222
 223 /* ARGSUSED */
 224 static 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
 232 \f
 233 #define hppabsd_core_get_symtab_upper_bound \
 234   _bfd_nosymbols_get_symtab_upper_bound
 235 #define hppabsd_core_get_symtab _bfd_nosymbols_get_symtab
 236 #define hppabsd_core_print_symbol _bfd_nosymbols_print_symbol
 237 #define hppabsd_core_get_symbol_info _bfd_nosymbols_get_symbol_info
 238 #define hppabsd_core_bfd_is_local_label _bfd_nosymbols_bfd_is_local_label
 239 #define hppabsd_core_get_lineno _bfd_nosymbols_get_lineno
 240 #define hppabsd_core_find_nearest_line _bfd_nosymbols_find_nearest_line
 241 #define hppabsd_core_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
 242 #define hppabsd_core_read_minisymbols _bfd_nosymbols_read_minisymbols
 243 #define hppabsd_core_minisymbol_to_symbol _bfd_nosymbols_minisymbol_to_symbol
 244
 245 /* If somebody calls any byte-swapping routines, shoot them.  */
 246 static void
 247 swap_abort ()
 248 {
 249   /* This way doesn't require any declaration for ANSI to fuck up.  */
 250   abort ();
 251 }
 252
 253 #define NO_GET  ((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )
 254 #define NO_PUT  ((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
 255 #define NO_SIGNED_GET \
 256   ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
 257
 258 const bfd_target hppabsd_core_vec =
 259   {
 260     "hppabsd-core",
 261     bfd_target_unknown_flavour,
 262     true,                       /* target byte order */
 263     true,                       /* target headers byte order */
 264     (HAS_RELOC | EXEC_P |       /* object flags */
 265      HAS_LINENO | HAS_DEBUG |
 266      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 267     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 268     0,                                                     /* symbol prefix */
 269     ' ',                                                   /* ar_pad_char */
 270     16,                                                    /* ar_max_namelen */
 271     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit data */
 272     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit data */
 273     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit data */
 274     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit hdrs */
 275     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit hdrs */
 276     NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit hdrs */
 277
 278     {                           /* bfd_check_format */
 279      _bfd_dummy_target,         /* unknown format */
 280      _bfd_dummy_target,         /* object file */
 281      _bfd_dummy_target,         /* archive */
 282      hppabsd_core_core_file_p   /* a core file */
 283     },
 284     {                           /* bfd_set_format */
 285      bfd_false, bfd_false,
 286      bfd_false, bfd_false
 287     },
 288     {                           /* bfd_write_contents */
 289      bfd_false, bfd_false,
 290      bfd_false, bfd_false
 291     },
 292
 293        BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 294        BFD_JUMP_TABLE_COPY (_bfd_generic),
 295        BFD_JUMP_TABLE_CORE (hppabsd_core),
 296        BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 297        BFD_JUMP_TABLE_SYMBOLS (hppabsd_core),
 298        BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 299        BFD_JUMP_TABLE_WRITE (_bfd_generic),
 300        BFD_JUMP_TABLE_LINK (_bfd_nolink),
 301        BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 302
 303     (PTR) 0                     /* backend_data */
 304 };
 305 #endif