| 1 | /* BFD back end for NetBSD style core files |
| 2 | Copyright (C) 1988-2020 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 const bfd_target * |
| 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 | bfd_size_type amt = sizeof core; |
| 64 | |
| 65 | val = bfd_bread (&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_bread (&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 abfd->xvec; |
| 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 ((bfd_uint64_t (*) (const void *)) swap_abort) |
| 261 | #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort) |
| 262 | #define NO_GETS64 ((bfd_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 | NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data. */ |
| 280 | NO_GET, NO_GETS, NO_PUT, /* 32 bit data. */ |
| 281 | NO_GET, NO_GETS, NO_PUT, /* 16 bit data. */ |
| 282 | NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs. */ |
| 283 | NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs. */ |
| 284 | NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs. */ |
| 285 | |
| 286 | { /* bfd_check_format. */ |
| 287 | _bfd_dummy_target, /* Unknown format. */ |
| 288 | _bfd_dummy_target, /* Object file. */ |
| 289 | _bfd_dummy_target, /* Archive. */ |
| 290 | netbsd_core_file_p /* A core file. */ |
| 291 | }, |
| 292 | { /* bfd_set_format. */ |
| 293 | _bfd_bool_bfd_false_error, |
| 294 | _bfd_bool_bfd_false_error, |
| 295 | _bfd_bool_bfd_false_error, |
| 296 | _bfd_bool_bfd_false_error |
| 297 | }, |
| 298 | { /* bfd_write_contents. */ |
| 299 | _bfd_bool_bfd_false_error, |
| 300 | _bfd_bool_bfd_false_error, |
| 301 | _bfd_bool_bfd_false_error, |
| 302 | _bfd_bool_bfd_false_error |
| 303 | }, |
| 304 | |
| 305 | BFD_JUMP_TABLE_GENERIC (_bfd_generic), |
| 306 | BFD_JUMP_TABLE_COPY (_bfd_generic), |
| 307 | BFD_JUMP_TABLE_CORE (netbsd), |
| 308 | BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), |
| 309 | BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols), |
| 310 | BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), |
| 311 | BFD_JUMP_TABLE_WRITE (_bfd_generic), |
| 312 | BFD_JUMP_TABLE_LINK (_bfd_nolink), |
| 313 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), |
| 314 | |
| 315 | NULL, |
| 316 | |
| 317 | NULL /* Backend_data. */ |
| 318 | }; |