bfd/trad-core.c

   1 /* BFD back end for traditional Unix core files (U-area and raw sections)
   2    Copyright (C) 1988, 1989, 1991 Free Software Foundation, Inc.
   3    Written by John Gilmore of Cygnus Support.
   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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21 /* To use this file on a particular host, configure the host with these
  22    parameters in the config/h-HOST file:
  23
  24         HDEFINES=-DHOST_SYS=WHATEVER_SYS -DTRAD_CORE
  25         HDEPFILES=trad-core.o
  26
  27  */
  28
  29 #include <sysdep.h>
  30 #include "bfd.h"
  31 #include <stdio.h>
  32 #include "libbfd.h"
  33 #include "libaout.h"           /* BFD a.out internal data structures */
  34
  35 #include <sys/types.h>
  36 #include <sys/param.h>
  37 #include <sys/dir.h>
  38 #include <signal.h>
  39 #include <machine/reg.h>
  40
  41 #include <sys/user.h>           /* After a.out.h  */
  42 #include <sys/file.h>
  43
  44 #include <errno.h>
  45
  46 /* These are stored in the bfd's tdata */
  47 struct core_data {
  48   struct user *upage;             /* core file header */
  49   asection *data_section;
  50   asection *stack_section;
  51   asection *reg_section;
  52 };
  53
  54 #define core_hdr(bfd) (((struct core_data *) (bfd->tdata))->hdr)
  55 #define core_upage(bfd) (((struct core_data *) ((bfd)->tdata))->upage)
  56 #define core_datasec(bfd) (((struct core_data *) ((bfd)->tdata))->data_section)
  57 #define core_stacksec(bfd) (((struct core_data*)((bfd)->tdata))->stack_section)
  58 #define core_regsec(bfd) (((struct core_data *) ((bfd)->tdata))->reg_section)
  59
  60 /* ARGSUSED */
  61 bfd_target *
  62 trad_unix_core_file_p (abfd)
  63      bfd *abfd;
  64 {
  65 #if HOST_SYS == SUN4_SYS
  66   return 0;
  67 #else
  68   int val;
  69   char *rawptr;
  70   struct user u;
  71   unsigned int reg_offset, fp_reg_offset;
  72
  73   /* 4.2-style (and perhaps also sysV-style) core dump file.  */
  74
  75   val = bfd_read ((void *)&u, 1, sizeof u, abfd);
  76   if (val != sizeof u)
  77     return 0;                   /* Too small to be a core file */
  78
  79   /* Sanity check perhaps??? */
  80   if (u.u_dsize > 0x1000000)    /* Remember, it's in pages... */
  81     return 0;
  82   if (u.u_ssize > 0x1000000)
  83     return 0;
  84   /* Check that the size claimed is no greater than the file size. FIXME. */
  85
  86   /* OK, we believe you.  You're a core file (sure, sure).  */
  87
  88   /* Allocate both the upage and the struct core_data at once, so
  89      a single free() will free them both.  */
  90   rawptr = (char *)zalloc (sizeof (u) + sizeof (struct core_data));
  91   if (rawptr == NULL) {
  92     bfd_error = no_memory;
  93     return 0;
  94   }
  95
  96   set_tdata (abfd, (struct core_data *)rawptr);
  97   core_upage (abfd) = (struct user *)(rawptr + sizeof (struct core_data));
  98   *core_upage (abfd) = u;               /* Save that upage! */
  99
 100   /* create the sections.  This is raunchy, but bfd_close wants to reclaim
 101      them */
 102   core_stacksec (abfd) = (asection *) zalloc (sizeof (asection));
 103   if (core_stacksec (abfd) == NULL) {
 104 loser:
 105     bfd_error = no_memory;
 106     free ((void *)rawptr);
 107     return 0;
 108   }
 109   core_datasec (abfd) = (asection *) zalloc (sizeof (asection));
 110   if (core_datasec (abfd) == NULL) {
 111 loser1:
 112     free ((void *)core_stacksec (abfd));
 113     goto loser;
 114   }
 115   core_regsec (abfd) = (asection *) zalloc (sizeof (asection));
 116   if (core_regsec (abfd) == NULL) {
 117 loser2:
 118     free ((void *)core_datasec (abfd));
 119     goto loser1;
 120   }
 121
 122   core_stacksec (abfd)->name = ".stack";
 123   core_datasec (abfd)->name = ".data";
 124   core_regsec (abfd)->name = ".reg";
 125
 126   core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 127   core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 128   core_regsec (abfd)->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 129
 130   core_datasec (abfd)->size =  NBPG * u.u_dsize;
 131   core_stacksec (abfd)->size = NBPG * u.u_ssize;
 132   core_regsec (abfd)->size = NBPG * UPAGES;  /* Larger than sizeof struct u */
 133
 134   /* What a hack... we'd like to steal it from the exec file,
 135      since the upage does not seem to provide it.  FIXME.  */
 136 #ifdef HOST_DATA_START_ADDR
 137   core_datasec (abfd)->vma = HOST_DATA_START_ADDR;
 138 #else
 139   core_datasec (abfd)->vma = HOST_TEXT_START_ADDR + (NBPG * u.u_tsize);
 140 #endif
 141   core_stacksec (abfd)->vma = HOST_STACK_END_ADDR - (NBPG * u.u_ssize);
 142   core_regsec (abfd)->vma = -1;
 143
 144   core_datasec (abfd)->filepos = NBPG * UPAGES;
 145   core_stacksec (abfd)->filepos = (NBPG * UPAGES) + NBPG * u.u_dsize;
 146   core_regsec (abfd)->filepos = 0;      /* Register segment is the upage */
 147
 148   /* Align to word at least */
 149   core_stacksec (abfd)->alignment_power = 2;
 150   core_datasec (abfd)->alignment_power = 2;
 151   core_regsec (abfd)->alignment_power = 2;
 152
 153   abfd->sections = core_stacksec (abfd);
 154   core_stacksec (abfd)->next = core_datasec (abfd);
 155   core_datasec (abfd)->next = core_regsec (abfd);
 156   abfd->section_count = 3;
 157
 158   return abfd->xvec;
 159 #endif
 160 }
 161
 162 char *
 163 trad_unix_core_file_failing_command (abfd)
 164      bfd *abfd;
 165 {
 166   if (*core_upage (abfd)->u_comm)
 167     return core_upage (abfd)->u_comm;
 168   else
 169     return 0;
 170 }
 171
 172 /* ARGSUSED */
 173 int
 174 trad_unix_core_file_failing_signal (ignore_abfd)
 175      bfd *ignore_abfd;
 176 {
 177   return -1;            /* FIXME, where is it? */
 178 }
 179
 180 /* ARGSUSED */
 181 boolean
 182 trad_unix_core_file_matches_executable_p  (core_bfd, exec_bfd)
 183      bfd *core_bfd, *exec_bfd;
 184 {
 185   return true;          /* FIXME, We have no way of telling at this point */
 186 }
 187 \f
 188 /* No archive file support via this BFD */
 189 #define trad_unix_openr_next_archived_file      bfd_generic_openr_next_archived_file
 190 #define trad_unix_generic_stat_arch_elt         bfd_generic_stat_arch_elt
 191 #define trad_unix_slurp_armap                   bfd_false
 192 #define trad_unix_slurp_extended_name_table     bfd_true
 193 #define trad_unix_write_armap                   (PROTO (boolean, (*),   \
 194      (bfd *arch, unsigned int elength, struct orl *map, int orl_count,  \
 195       int stridx))) bfd_false
 196 #define trad_unix_truncate_arname               bfd_dont_truncate_arname
 197 #define aout_32_openr_next_archived_file        bfd_generic_openr_next_archived_file
 198
 199 #define trad_unix_close_and_cleanup             bfd_generic_close_and_cleanup
 200 #define trad_unix_set_section_contents          (PROTO(boolean, (*),    \
 201          (bfd *abfd, asection *section, PTR data, file_ptr offset,      \
 202          bfd_size_type count))) bfd_false
 203 #define trad_unix_get_section_contents          bfd_generic_get_section_contents
 204 #define trad_unix_new_section_hook              (PROTO (boolean, (*),   \
 205         (bfd *, sec_ptr))) bfd_true
 206 #define trad_unix_get_symtab_upper_bound        bfd_0u
 207 #define trad_unix_get_symtab                    (PROTO (unsigned int, (*), \
 208         (bfd *, struct symbol_cache_entry **))) bfd_0u
 209 #define trad_unix_get_reloc_upper_bound         (PROTO (unsigned int, (*), \
 210         (bfd *, sec_ptr))) bfd_0u
 211 #define trad_unix_canonicalize_reloc            (PROTO (unsigned int, (*), \
 212         (bfd *, sec_ptr, arelent **, struct symbol_cache_entry**))) bfd_0u
 213 #define trad_unix_make_empty_symbol             (PROTO (                \
 214         struct symbol_cache_entry *, (*), (bfd *))) bfd_false
 215 #define trad_unix_print_symbol                  (PROTO (void, (*),      \
 216         (bfd *, PTR, struct symbol_cache_entry  *,                      \
 217          bfd_print_symbol_type))) bfd_false
 218 #define trad_unix_get_lineno                    (PROTO (alent *, (*),   \
 219         (bfd *, struct symbol_cache_entry *))) bfd_nullvoidptr
 220 #define trad_unix_set_arch_mach                 (PROTO (boolean, (*),   \
 221         (bfd *, enum bfd_architecture, unsigned long))) bfd_false
 222 #define trad_unix_find_nearest_line             (PROTO (boolean, (*),   \
 223         (bfd *abfd, struct sec  *section,                               \
 224          struct symbol_cache_entry  **symbols,bfd_vma offset,           \
 225          CONST char **file, CONST char **func, unsigned int *line))) bfd_false
 226 #define trad_unix_sizeof_headers                (PROTO (int, (*),       \
 227         (bfd *, boolean))) bfd_0
 228
 229 #define trad_unix_bfd_debug_info_start          bfd_void
 230 #define trad_unix_bfd_debug_info_end            bfd_void
 231 #define trad_unix_bfd_debug_info_accumulate     (PROTO (void, (*),      \
 232         (bfd *, struct sec *))) bfd_void
 233
 234
 235 bfd_target trad_core_big_vec =
 236   {
 237     "trad-core-big",
 238     bfd_target_unknown_flavour,
 239     true,                       /* target byte order */
 240     true,                       /* target headers byte order */
 241     (HAS_RELOC | EXEC_P |       /* object flags */
 242      HAS_LINENO | HAS_DEBUG |
 243      HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
 244     (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 245     ' ',                                                   /* ar_pad_char */
 246     16,                                                    /* ar_max_namelen */
 247     3,                                                     /* minimum alignment power */
 248     _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* data */
 249     _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* hdrs */
 250
 251       {_bfd_dummy_target, _bfd_dummy_target,
 252        _bfd_dummy_target, trad_unix_core_file_p},
 253       {bfd_false, bfd_false,    /* bfd_create_object */
 254        bfd_false, bfd_false},
 255       {bfd_false, bfd_false,    /* bfd_write_contents */
 256        bfd_false, bfd_false},
 257
 258     JUMP_TABLE(trad_unix)
 259 };
 260
 261 bfd_target trad_core_little_vec =
 262 {
 263   "trad-core-little",
 264   bfd_target_unknown_flavour,
 265   false,                        /* target byte order */
 266   false,                        /* target headers byte order */
 267   (HAS_RELOC | EXEC_P | /* object flags */
 268    HAS_LINENO | HAS_DEBUG |
 269    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
 270   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 271   ' ',                          /* ar_pad_char */
 272   16,                           /* ar_max_namelen */
 273   3,                            /* minimum alignment power */
 274   _do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putb16,
 275   _do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16,
 276
 277   {_bfd_dummy_target, _bfd_dummy_target,
 278    _bfd_dummy_target, trad_unix_core_file_p},
 279   {bfd_false, bfd_false,        /* bfd_create_object */
 280    bfd_false, bfd_false},
 281   {bfd_false, bfd_false,        /* bfd_write_contents */
 282    bfd_false, bfd_false},
 283
 284   JUMP_TABLE(trad_unix)
 285 };