bfd/osf-core.c

   1 /* BFD back-end for OSF/1 core files.
   2    Copyright (C) 1993-2022 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
  19    MA 02110-1301, USA.  */
  20
  21
  22 /* This file can only be compiled on systems which use OSF/1 style
  23    core files.  */
  24
  25 #include "sysdep.h"
  26 #include "bfd.h"
  27 #include "libbfd.h"
  28
  29 #include <sys/user.h>
  30 #ifdef OSF_CORE
  31 #include <sys/core.h>
  32 #endif
  33
  34 /* forward declarations */
  35
  36 #define osf_core_core_file_matches_executable_p generic_core_file_matches_executable_p
  37 #define osf_core_core_file_pid _bfd_nocore_core_file_pid
  38
  39 /* These are stored in the bfd's tdata */
  40
  41 struct osf_core_struct
  42 {
  43   int sig;
  44   char cmd[MAXCOMLEN + 1];
  45 };
  46
  47 #define core_hdr(bfd) ((bfd)->tdata.osf_core_data)
  48 #define core_signal(bfd)  (core_hdr(bfd)->sig)
  49 #define core_command(bfd) (core_hdr(bfd)->cmd)
  50
  51 static asection *
  52 make_bfd_asection (bfd *abfd,
  53                    const char *name,
  54                    flagword flags,
  55                    bfd_size_type size,
  56                    bfd_vma vma,
  57                    file_ptr filepos)
  58 {
  59   asection *asect;
  60
  61   asect = bfd_make_section_anyway_with_flags (abfd, name, flags);
  62   if (!asect)
  63     return NULL;
  64
  65   asect->size = size;
  66   asect->vma = vma;
  67   asect->filepos = filepos;
  68   asect->alignment_power = 8;
  69
  70   return asect;
  71 }
  72
  73 static bfd_cleanup
  74 osf_core_core_file_p (bfd *abfd)
  75 {
  76   int val;
  77   int i;
  78   char *secname;
  79   struct core_filehdr core_header;
  80   size_t amt;
  81
  82   amt = sizeof core_header;
  83   val = bfd_bread (& core_header, amt, abfd);
  84   if (val != sizeof core_header)
  85     return NULL;
  86
  87   if (! startswith (core_header.magic, "Core"))
  88     return NULL;
  89
  90   core_hdr (abfd) = (struct osf_core_struct *)
  91     bfd_zalloc (abfd, (bfd_size_type) sizeof (struct osf_core_struct));
  92   if (!core_hdr (abfd))
  93     return NULL;
  94
  95   strncpy (core_command (abfd), core_header.name, MAXCOMLEN + 1);
  96   core_signal (abfd) = core_header.signo;
  97
  98   for (i = 0; i < core_header.nscns; i++)
  99     {
 100       struct core_scnhdr core_scnhdr;
 101       flagword flags;
 102
 103       amt = sizeof core_scnhdr;
 104       val = bfd_bread (& core_scnhdr, amt, abfd);
 105       if (val != sizeof core_scnhdr)
 106         break;
 107
 108       /* Skip empty sections.  */
 109       if (core_scnhdr.size == 0 || core_scnhdr.scnptr == 0)
 110         continue;
 111
 112       switch (core_scnhdr.scntype)
 113         {
 114         case SCNRGN:
 115           secname = ".data";
 116           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 117           break;
 118         case SCNSTACK:
 119           secname = ".stack";
 120           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 121           break;
 122         case SCNREGS:
 123           secname = ".reg";
 124           flags = SEC_HAS_CONTENTS;
 125           break;
 126         default:
 127           _bfd_error_handler (_("unhandled OSF/1 core file section type %d"),
 128                               core_scnhdr.scntype);
 129           continue;
 130         }
 131
 132       if (!make_bfd_asection (abfd, secname, flags,
 133                               (bfd_size_type) core_scnhdr.size,
 134                               (bfd_vma) core_scnhdr.vaddr,
 135                               (file_ptr) core_scnhdr.scnptr))
 136         goto fail;
 137     }
 138
 139   /* OK, we believe you.  You're a core file (sure, sure).  */
 140
 141   return _bfd_no_cleanup;
 142
 143  fail:
 144   bfd_release (abfd, core_hdr (abfd));
 145   core_hdr (abfd) = NULL;
 146   bfd_section_list_clear (abfd);
 147   return NULL;
 148 }
 149
 150 static char *
 151 osf_core_core_file_failing_command (bfd *abfd)
 152 {
 153   return core_command (abfd);
 154 }
 155
 156 static int
 157 osf_core_core_file_failing_signal (bfd *abfd)
 158 {
 159   return core_signal (abfd);
 160 }
 161 \f
 162 /* If somebody calls any byte-swapping routines, shoot them.  */
 163 static void
 164 swap_abort (void)
 165 {
 166   abort (); /* This way doesn't require any declaration for ANSI to fuck up */
 167 }
 168
 169 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
 170 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
 171 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
 172 #define NO_GET64 ((uint64_t (*) (const void *)) swap_abort)
 173 #define NO_PUT64 ((void (*) (uint64_t, void *)) swap_abort)
 174 #define NO_GETS64 ((int64_t (*) (const void *)) swap_abort)
 175
 176 const bfd_target core_osf_vec =
 177   {
 178     "osf-core",
 179     bfd_target_unknown_flavour,
 180     BFD_ENDIAN_LITTLE,          /* target byte order */
 181     BFD_ENDIAN_LITTLE,          /* target headers byte order */
 182     (HAS_RELOC | EXEC_P |       /* object flags */
 183      HAS_LINENO | HAS_DEBUG |
 184      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 185     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 186     0,                          /* symbol prefix */
 187     ' ',                        /* ar_pad_char */
 188     16,                         /* ar_max_namelen */
 189     0,                          /* match priority.  */
 190     TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols.  */
 191     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit data */
 192     NO_GET, NO_GETS, NO_PUT,            /* 32 bit data */
 193     NO_GET, NO_GETS, NO_PUT,            /* 16 bit data */
 194     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit hdrs */
 195     NO_GET, NO_GETS, NO_PUT,            /* 32 bit hdrs */
 196     NO_GET, NO_GETS, NO_PUT,            /* 16 bit hdrs */
 197
 198     {                           /* bfd_check_format */
 199       _bfd_dummy_target,                /* unknown format */
 200       _bfd_dummy_target,                /* object file */
 201       _bfd_dummy_target,                /* archive */
 202       osf_core_core_file_p              /* a core file */
 203     },
 204     {                           /* bfd_set_format */
 205       _bfd_bool_bfd_false_error,
 206       _bfd_bool_bfd_false_error,
 207       _bfd_bool_bfd_false_error,
 208       _bfd_bool_bfd_false_error
 209     },
 210     {                           /* bfd_write_contents */
 211       _bfd_bool_bfd_false_error,
 212       _bfd_bool_bfd_false_error,
 213       _bfd_bool_bfd_false_error,
 214       _bfd_bool_bfd_false_error
 215     },
 216
 217     BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 218     BFD_JUMP_TABLE_COPY (_bfd_generic),
 219     BFD_JUMP_TABLE_CORE (osf_core),
 220     BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 221     BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 222     BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 223     BFD_JUMP_TABLE_WRITE (_bfd_generic),
 224     BFD_JUMP_TABLE_LINK (_bfd_nolink),
 225     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 226
 227     NULL,
 228
 229     NULL                        /* backend_data */
 230   };