bfd/netbsd-core.c

   1 /* BFD back end for NetBSD style core files
   2    Copyright (C) 1988-2024 Free Software Foundation, Inc.
   3    Written by Paul Kranenburg, EUR
   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 3 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,
  20    MA 02110-1301, USA.  */
  21
  22 #include "sysdep.h"
  23 #include "bfd.h"
  24 #include "libbfd.h"
  25 #include "libaout.h"           /* BFD a.out internal data structures.  */
  26
  27 #include <sys/param.h>
  28 #include <sys/dir.h>
  29 #include <signal.h>
  30 #include <sys/core.h>
  31
  32 /* The machine ID for OpenBSD/sparc64 and older versions of
  33    NetBSD/sparc64 overlaps with M_MIPS1.  */
  34 #define M_SPARC64_OPENBSD       M_MIPS1
  35
  36 /* Offset of StackGhost cookie within `struct md_coredump' on
  37    OpenBSD/sparc.  */
  38 #define SPARC_WCOOKIE_OFFSET    344
  39
  40 /* Offset of StackGhost cookie within `struct md_coredump' on
  41    OpenBSD/sparc64.  */
  42 #define SPARC64_WCOOKIE_OFFSET  832
  43
  44 #define netbsd_core_file_matches_executable_p generic_core_file_matches_executable_p
  45 #define netbsd_core_file_pid _bfd_nocore_core_file_pid
  46
  47 struct netbsd_core_struct
  48 {
  49   struct core core;
  50 } *rawptr;
  51
  52 /* Handle NetBSD-style core dump file.  */
  53
  54 static bfd_cleanup
  55 netbsd_core_file_p (bfd *abfd)
  56 {
  57   int val;
  58   unsigned i;
  59   file_ptr offset;
  60   asection *asect;
  61   struct core core;
  62   struct coreseg coreseg;
  63   size_t amt = sizeof core;
  64
  65   val = bfd_read (&core, amt, abfd);
  66   if (val != sizeof core)
  67     {
  68       /* Too small to be a core file.  */
  69       bfd_set_error (bfd_error_wrong_format);
  70       return 0;
  71     }
  72
  73   if (CORE_GETMAGIC (core) != COREMAGIC)
  74     {
  75       bfd_set_error (bfd_error_wrong_format);
  76       return 0;
  77     }
  78
  79   amt = sizeof (struct netbsd_core_struct);
  80   rawptr = (struct netbsd_core_struct *) bfd_zalloc (abfd, amt);
  81   if (rawptr == NULL)
  82     return 0;
  83
  84   rawptr->core = core;
  85   abfd->tdata.netbsd_core_data = rawptr;
  86
  87   offset = core.c_hdrsize;
  88   for (i = 0; i < core.c_nseg; i++)
  89     {
  90       const char *sname;
  91       flagword flags;
  92
  93       if (bfd_seek (abfd, offset, SEEK_SET) != 0)
  94         goto punt;
  95
  96       val = bfd_read (&coreseg, sizeof coreseg, abfd);
  97       if (val != sizeof coreseg)
  98         {
  99           bfd_set_error (bfd_error_file_truncated);
 100           goto punt;
 101         }
 102       if (CORE_GETMAGIC (coreseg) != CORESEGMAGIC)
 103         {
 104           bfd_set_error (bfd_error_wrong_format);
 105           goto punt;
 106         }
 107
 108       offset += core.c_seghdrsize;
 109
 110       switch (CORE_GETFLAG (coreseg))
 111         {
 112         case CORE_CPU:
 113           sname = ".reg";
 114           flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 115           break;
 116         case CORE_DATA:
 117           sname = ".data";
 118           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 119           break;
 120         case CORE_STACK:
 121           sname = ".stack";
 122           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 123           break;
 124         default:
 125           sname = ".unknown";
 126           flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 127           break;
 128         }
 129       asect = bfd_make_section_anyway_with_flags (abfd, sname, flags);
 130       if (asect == NULL)
 131         goto punt;
 132
 133       asect->size = coreseg.c_size;
 134       asect->vma = coreseg.c_addr;
 135       asect->filepos = offset;
 136       asect->alignment_power = 2;
 137
 138       if (CORE_GETFLAG (coreseg) == CORE_CPU)
 139         {
 140           bfd_size_type wcookie_offset;
 141
 142           switch (CORE_GETMID (core))
 143             {
 144             case M_SPARC_NETBSD:
 145               wcookie_offset = SPARC_WCOOKIE_OFFSET;
 146               break;
 147             case M_SPARC64_OPENBSD:
 148               wcookie_offset = SPARC64_WCOOKIE_OFFSET;
 149               break;
 150             default:
 151               wcookie_offset = 0;
 152               break;
 153             }
 154
 155           if (wcookie_offset > 0 && coreseg.c_size > wcookie_offset)
 156             {
 157               /* Truncate the .reg section.  */
 158               asect->size = wcookie_offset;
 159
 160               /* And create the .wcookie section.  */
 161               flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 162               asect = bfd_make_section_anyway_with_flags (abfd, ".wcookie",
 163                                                           flags);
 164               if (asect == NULL)
 165                 goto punt;
 166
 167               asect->size = coreseg.c_size - wcookie_offset;
 168               asect->vma = 0;
 169               asect->filepos = offset + wcookie_offset;
 170               asect->alignment_power = 2;
 171             }
 172         }
 173
 174       offset += coreseg.c_size;
 175     }
 176
 177   /* Set architecture from machine ID.  */
 178   switch (CORE_GETMID (core))
 179     {
 180     case M_ALPHA_NETBSD:
 181       bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0);
 182       break;
 183
 184     case M_ARM6_NETBSD:
 185       bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_3);
 186       break;
 187
 188     case M_X86_64_NETBSD:
 189       bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
 190       break;
 191
 192     case M_386_NETBSD:
 193       bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386);
 194       break;
 195
 196     case M_68K_NETBSD:
 197     case M_68K4K_NETBSD:
 198       bfd_default_set_arch_mach (abfd, bfd_arch_m68k, 0);
 199       break;
 200
 201     case M_HPPA_OPENBSD:
 202       bfd_default_set_arch_mach (abfd, bfd_arch_hppa, bfd_mach_hppa11);
 203       break;
 204
 205     case M_POWERPC_NETBSD:
 206       bfd_default_set_arch_mach (abfd, bfd_arch_powerpc, bfd_mach_ppc);
 207       break;
 208
 209     case M_SPARC_NETBSD:
 210       bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc);
 211       break;
 212
 213     case M_SPARC64_NETBSD:
 214     case M_SPARC64_OPENBSD:
 215       bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc_v9);
 216       break;
 217
 218     case M_VAX_NETBSD:
 219     case M_VAX4K_NETBSD:
 220       bfd_default_set_arch_mach (abfd, bfd_arch_vax, 0);
 221       break;
 222     }
 223
 224   /* OK, we believe you.  You're a core file (sure, sure).  */
 225   return _bfd_no_cleanup;
 226
 227  punt:
 228   bfd_release (abfd, abfd->tdata.any);
 229   abfd->tdata.any = NULL;
 230   bfd_section_list_clear (abfd);
 231   return 0;
 232 }
 233
 234 static char*
 235 netbsd_core_file_failing_command (bfd *abfd)
 236 {
 237   /*return core_command (abfd);*/
 238   return abfd->tdata.netbsd_core_data->core.c_name;
 239 }
 240
 241 static int
 242 netbsd_core_file_failing_signal (bfd *abfd)
 243 {
 244   /*return core_signal (abfd);*/
 245   return abfd->tdata.netbsd_core_data->core.c_signo;
 246 }
 247 \f
 248 /* If somebody calls any byte-swapping routines, shoot them.  */
 249
 250 static void
 251 swap_abort (void)
 252 {
 253  /* This way doesn't require any declaration for ANSI to fuck up.  */
 254   abort ();
 255 }
 256
 257 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
 258 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
 259 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
 260 #define NO_GET64 ((uint64_t (*) (const void *)) swap_abort)
 261 #define NO_PUT64 ((void (*) (uint64_t, void *)) swap_abort)
 262 #define NO_GETS64 ((int64_t (*) (const void *)) swap_abort)
 263
 264 const bfd_target core_netbsd_vec =
 265   {
 266     "netbsd-core",
 267     bfd_target_unknown_flavour,
 268     BFD_ENDIAN_UNKNOWN,         /* Target byte order.  */
 269     BFD_ENDIAN_UNKNOWN,         /* Target headers byte order.  */
 270     (HAS_RELOC | EXEC_P |       /* Object flags.  */
 271      HAS_LINENO | HAS_DEBUG |
 272      HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 273     (SEC_HAS_CONTENTS |         /* Section flags.  */
 274      SEC_ALLOC | SEC_LOAD | SEC_RELOC),
 275     0,                          /* Symbol prefix.  */
 276     ' ',                        /* ar_pad_char.  */
 277     16,                         /* ar_max_namelen.  */
 278     0,                          /* Match priority.  */
 279     TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols.  */
 280     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit data.  */
 281     NO_GET, NO_GETS, NO_PUT,            /* 32 bit data.  */
 282     NO_GET, NO_GETS, NO_PUT,            /* 16 bit data.  */
 283     NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit hdrs.  */
 284     NO_GET, NO_GETS, NO_PUT,            /* 32 bit hdrs.  */
 285     NO_GET, NO_GETS, NO_PUT,            /* 16 bit hdrs.  */
 286
 287     {                                   /* bfd_check_format.  */
 288       _bfd_dummy_target,                /* Unknown format.  */
 289       _bfd_dummy_target,                /* Object file.  */
 290       _bfd_dummy_target,                /* Archive.  */
 291       netbsd_core_file_p                /* A core file.  */
 292     },
 293     {                                   /* bfd_set_format.  */
 294       _bfd_bool_bfd_false_error,
 295       _bfd_bool_bfd_false_error,
 296       _bfd_bool_bfd_false_error,
 297       _bfd_bool_bfd_false_error
 298     },
 299     {                                   /* bfd_write_contents.  */
 300       _bfd_bool_bfd_false_error,
 301       _bfd_bool_bfd_false_error,
 302       _bfd_bool_bfd_false_error,
 303       _bfd_bool_bfd_false_error
 304     },
 305
 306     BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 307     BFD_JUMP_TABLE_COPY (_bfd_generic),
 308     BFD_JUMP_TABLE_CORE (netbsd),
 309     BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 310     BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 311     BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 312     BFD_JUMP_TABLE_WRITE (_bfd_generic),
 313     BFD_JUMP_TABLE_LINK (_bfd_nolink),
 314     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 315
 316     NULL,
 317
 318     NULL                                /* Backend_data.  */
 319   };