1 /* BFD back end for NetBSD style core files 2 Copyright (C) 1988-2016 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_88K_OPENBSD: 202 bfd_default_set_arch_mach (abfd, bfd_arch_m88k, 0); 203 break; 204 205 case M_HPPA_OPENBSD: 206 bfd_default_set_arch_mach (abfd, bfd_arch_hppa, bfd_mach_hppa11); 207 break; 208 209 case M_POWERPC_NETBSD: 210 bfd_default_set_arch_mach (abfd, bfd_arch_powerpc, bfd_mach_ppc); 211 break; 212 213 case M_SPARC_NETBSD: 214 bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc); 215 break; 216 217 case M_SPARC64_NETBSD: 218 case M_SPARC64_OPENBSD: 219 bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc_v9); 220 break; 221 222 case M_VAX_NETBSD: 223 case M_VAX4K_NETBSD: 224 bfd_default_set_arch_mach (abfd, bfd_arch_vax, 0); 225 break; 226 } 227 228 /* OK, we believe you. You're a core file (sure, sure). */ 229 return abfd->xvec; 230 231 punt: 232 bfd_release (abfd, abfd->tdata.any); 233 abfd->tdata.any = NULL; 234 bfd_section_list_clear (abfd); 235 return 0; 236 } 237 238 static char* 239 netbsd_core_file_failing_command (bfd *abfd) 240 { 241 /*return core_command (abfd);*/ 242 return abfd->tdata.netbsd_core_data->core.c_name; 243 } 244 245 static int 246 netbsd_core_file_failing_signal (bfd *abfd) 247 { 248 /*return core_signal (abfd);*/ 249 return abfd->tdata.netbsd_core_data->core.c_signo; 250 } 251 252 /* If somebody calls any byte-swapping routines, shoot them. */ 254 255 static void 256 swap_abort (void) 257 { 258 /* This way doesn't require any declaration for ANSI to fuck up. */ 259 abort (); 260 } 261 262 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort) 263 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort) 264 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort) 265 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort) 266 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort) 267 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort) 268 269 const bfd_target core_netbsd_vec = 270 { 271 "netbsd-core", 272 bfd_target_unknown_flavour, 273 BFD_ENDIAN_UNKNOWN, /* Target byte order. */ 274 BFD_ENDIAN_UNKNOWN, /* Target headers byte order. */ 275 (HAS_RELOC | EXEC_P | /* Object flags. */ 276 HAS_LINENO | HAS_DEBUG | 277 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), 278 (SEC_HAS_CONTENTS | /* Section flags. */ 279 SEC_ALLOC | SEC_LOAD | SEC_RELOC), 280 0, /* Symbol prefix. */ 281 ' ', /* ar_pad_char. */ 282 16, /* ar_max_namelen. */ 283 0, /* Match priority. */ 284 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data. */ 285 NO_GET, NO_GETS, NO_PUT, /* 32 bit data. */ 286 NO_GET, NO_GETS, NO_PUT, /* 16 bit data. */ 287 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs. */ 288 NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs. */ 289 NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs. */ 290 291 { /* bfd_check_format. */ 292 _bfd_dummy_target, /* Unknown format. */ 293 _bfd_dummy_target, /* Object file. */ 294 _bfd_dummy_target, /* Archive. */ 295 netbsd_core_file_p /* A core file. */ 296 }, 297 { /* bfd_set_format. */ 298 bfd_false, bfd_false, 299 bfd_false, bfd_false 300 }, 301 { /* bfd_write_contents. */ 302 bfd_false, bfd_false, 303 bfd_false, bfd_false 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 }; 320
