Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 1 | /* |
| 2 | * QEMU dump |
| 3 | * |
| 4 | * Copyright Fujitsu, Corp. 2011, 2012 |
| 5 | * |
| 6 | * Authors: |
| 7 | * Wen Congyang <wency@cn.fujitsu.com> |
| 8 | * |
Stefan Weil | 352666e | 2012-06-10 19:34:04 +0000 | [diff] [blame] | 9 | * This work is licensed under the terms of the GNU GPL, version 2 or later. |
| 10 | * See the COPYING file in the top-level directory. |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 11 | * |
| 12 | */ |
| 13 | |
| 14 | #include "qemu-common.h" |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 15 | #include "elf.h" |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 16 | #include "cpu.h" |
| 17 | #include "cpu-all.h" |
| 18 | #include "targphys.h" |
| 19 | #include "monitor.h" |
| 20 | #include "kvm.h" |
| 21 | #include "dump.h" |
| 22 | #include "sysemu.h" |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 23 | #include "memory_mapping.h" |
| 24 | #include "error.h" |
| 25 | #include "qmp-commands.h" |
| 26 | #include "gdbstub.h" |
| 27 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 28 | static uint16_t cpu_convert_to_target16(uint16_t val, int endian) |
| 29 | { |
| 30 | if (endian == ELFDATA2LSB) { |
| 31 | val = cpu_to_le16(val); |
| 32 | } else { |
| 33 | val = cpu_to_be16(val); |
| 34 | } |
| 35 | |
| 36 | return val; |
| 37 | } |
| 38 | |
| 39 | static uint32_t cpu_convert_to_target32(uint32_t val, int endian) |
| 40 | { |
| 41 | if (endian == ELFDATA2LSB) { |
| 42 | val = cpu_to_le32(val); |
| 43 | } else { |
| 44 | val = cpu_to_be32(val); |
| 45 | } |
| 46 | |
| 47 | return val; |
| 48 | } |
| 49 | |
| 50 | static uint64_t cpu_convert_to_target64(uint64_t val, int endian) |
| 51 | { |
| 52 | if (endian == ELFDATA2LSB) { |
| 53 | val = cpu_to_le64(val); |
| 54 | } else { |
| 55 | val = cpu_to_be64(val); |
| 56 | } |
| 57 | |
| 58 | return val; |
| 59 | } |
| 60 | |
| 61 | typedef struct DumpState { |
| 62 | ArchDumpInfo dump_info; |
| 63 | MemoryMappingList list; |
| 64 | uint16_t phdr_num; |
| 65 | uint32_t sh_info; |
| 66 | bool have_section; |
| 67 | bool resume; |
| 68 | size_t note_size; |
| 69 | target_phys_addr_t memory_offset; |
| 70 | int fd; |
| 71 | |
| 72 | RAMBlock *block; |
| 73 | ram_addr_t start; |
| 74 | bool has_filter; |
| 75 | int64_t begin; |
| 76 | int64_t length; |
| 77 | Error **errp; |
| 78 | } DumpState; |
| 79 | |
| 80 | static int dump_cleanup(DumpState *s) |
| 81 | { |
| 82 | int ret = 0; |
| 83 | |
| 84 | memory_mapping_list_free(&s->list); |
| 85 | if (s->fd != -1) { |
| 86 | close(s->fd); |
| 87 | } |
| 88 | if (s->resume) { |
| 89 | vm_start(); |
| 90 | } |
| 91 | |
| 92 | return ret; |
| 93 | } |
| 94 | |
| 95 | static void dump_error(DumpState *s, const char *reason) |
| 96 | { |
| 97 | dump_cleanup(s); |
| 98 | } |
| 99 | |
| 100 | static int fd_write_vmcore(void *buf, size_t size, void *opaque) |
| 101 | { |
| 102 | DumpState *s = opaque; |
Luiz Capitulino | 2f61652 | 2012-09-21 13:17:55 -0300 | [diff] [blame] | 103 | size_t written_size; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 104 | |
Luiz Capitulino | 2f61652 | 2012-09-21 13:17:55 -0300 | [diff] [blame] | 105 | written_size = qemu_write_full(s->fd, buf, size); |
| 106 | if (written_size != size) { |
| 107 | return -1; |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 108 | } |
| 109 | |
| 110 | return 0; |
| 111 | } |
| 112 | |
| 113 | static int write_elf64_header(DumpState *s) |
| 114 | { |
| 115 | Elf64_Ehdr elf_header; |
| 116 | int ret; |
| 117 | int endian = s->dump_info.d_endian; |
| 118 | |
| 119 | memset(&elf_header, 0, sizeof(Elf64_Ehdr)); |
| 120 | memcpy(&elf_header, ELFMAG, SELFMAG); |
| 121 | elf_header.e_ident[EI_CLASS] = ELFCLASS64; |
| 122 | elf_header.e_ident[EI_DATA] = s->dump_info.d_endian; |
| 123 | elf_header.e_ident[EI_VERSION] = EV_CURRENT; |
| 124 | elf_header.e_type = cpu_convert_to_target16(ET_CORE, endian); |
| 125 | elf_header.e_machine = cpu_convert_to_target16(s->dump_info.d_machine, |
| 126 | endian); |
| 127 | elf_header.e_version = cpu_convert_to_target32(EV_CURRENT, endian); |
| 128 | elf_header.e_ehsize = cpu_convert_to_target16(sizeof(elf_header), endian); |
| 129 | elf_header.e_phoff = cpu_convert_to_target64(sizeof(Elf64_Ehdr), endian); |
| 130 | elf_header.e_phentsize = cpu_convert_to_target16(sizeof(Elf64_Phdr), |
| 131 | endian); |
| 132 | elf_header.e_phnum = cpu_convert_to_target16(s->phdr_num, endian); |
| 133 | if (s->have_section) { |
| 134 | uint64_t shoff = sizeof(Elf64_Ehdr) + sizeof(Elf64_Phdr) * s->sh_info; |
| 135 | |
| 136 | elf_header.e_shoff = cpu_convert_to_target64(shoff, endian); |
| 137 | elf_header.e_shentsize = cpu_convert_to_target16(sizeof(Elf64_Shdr), |
| 138 | endian); |
| 139 | elf_header.e_shnum = cpu_convert_to_target16(1, endian); |
| 140 | } |
| 141 | |
| 142 | ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s); |
| 143 | if (ret < 0) { |
| 144 | dump_error(s, "dump: failed to write elf header.\n"); |
| 145 | return -1; |
| 146 | } |
| 147 | |
| 148 | return 0; |
| 149 | } |
| 150 | |
| 151 | static int write_elf32_header(DumpState *s) |
| 152 | { |
| 153 | Elf32_Ehdr elf_header; |
| 154 | int ret; |
| 155 | int endian = s->dump_info.d_endian; |
| 156 | |
| 157 | memset(&elf_header, 0, sizeof(Elf32_Ehdr)); |
| 158 | memcpy(&elf_header, ELFMAG, SELFMAG); |
| 159 | elf_header.e_ident[EI_CLASS] = ELFCLASS32; |
| 160 | elf_header.e_ident[EI_DATA] = endian; |
| 161 | elf_header.e_ident[EI_VERSION] = EV_CURRENT; |
| 162 | elf_header.e_type = cpu_convert_to_target16(ET_CORE, endian); |
| 163 | elf_header.e_machine = cpu_convert_to_target16(s->dump_info.d_machine, |
| 164 | endian); |
| 165 | elf_header.e_version = cpu_convert_to_target32(EV_CURRENT, endian); |
| 166 | elf_header.e_ehsize = cpu_convert_to_target16(sizeof(elf_header), endian); |
| 167 | elf_header.e_phoff = cpu_convert_to_target32(sizeof(Elf32_Ehdr), endian); |
| 168 | elf_header.e_phentsize = cpu_convert_to_target16(sizeof(Elf32_Phdr), |
| 169 | endian); |
| 170 | elf_header.e_phnum = cpu_convert_to_target16(s->phdr_num, endian); |
| 171 | if (s->have_section) { |
| 172 | uint32_t shoff = sizeof(Elf32_Ehdr) + sizeof(Elf32_Phdr) * s->sh_info; |
| 173 | |
| 174 | elf_header.e_shoff = cpu_convert_to_target32(shoff, endian); |
| 175 | elf_header.e_shentsize = cpu_convert_to_target16(sizeof(Elf32_Shdr), |
| 176 | endian); |
| 177 | elf_header.e_shnum = cpu_convert_to_target16(1, endian); |
| 178 | } |
| 179 | |
| 180 | ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s); |
| 181 | if (ret < 0) { |
| 182 | dump_error(s, "dump: failed to write elf header.\n"); |
| 183 | return -1; |
| 184 | } |
| 185 | |
| 186 | return 0; |
| 187 | } |
| 188 | |
| 189 | static int write_elf64_load(DumpState *s, MemoryMapping *memory_mapping, |
| 190 | int phdr_index, target_phys_addr_t offset) |
| 191 | { |
| 192 | Elf64_Phdr phdr; |
| 193 | int ret; |
| 194 | int endian = s->dump_info.d_endian; |
| 195 | |
| 196 | memset(&phdr, 0, sizeof(Elf64_Phdr)); |
| 197 | phdr.p_type = cpu_convert_to_target32(PT_LOAD, endian); |
| 198 | phdr.p_offset = cpu_convert_to_target64(offset, endian); |
| 199 | phdr.p_paddr = cpu_convert_to_target64(memory_mapping->phys_addr, endian); |
| 200 | if (offset == -1) { |
| 201 | /* When the memory is not stored into vmcore, offset will be -1 */ |
| 202 | phdr.p_filesz = 0; |
| 203 | } else { |
| 204 | phdr.p_filesz = cpu_convert_to_target64(memory_mapping->length, endian); |
| 205 | } |
| 206 | phdr.p_memsz = cpu_convert_to_target64(memory_mapping->length, endian); |
| 207 | phdr.p_vaddr = cpu_convert_to_target64(memory_mapping->virt_addr, endian); |
| 208 | |
| 209 | ret = fd_write_vmcore(&phdr, sizeof(Elf64_Phdr), s); |
| 210 | if (ret < 0) { |
| 211 | dump_error(s, "dump: failed to write program header table.\n"); |
| 212 | return -1; |
| 213 | } |
| 214 | |
| 215 | return 0; |
| 216 | } |
| 217 | |
| 218 | static int write_elf32_load(DumpState *s, MemoryMapping *memory_mapping, |
| 219 | int phdr_index, target_phys_addr_t offset) |
| 220 | { |
| 221 | Elf32_Phdr phdr; |
| 222 | int ret; |
| 223 | int endian = s->dump_info.d_endian; |
| 224 | |
| 225 | memset(&phdr, 0, sizeof(Elf32_Phdr)); |
| 226 | phdr.p_type = cpu_convert_to_target32(PT_LOAD, endian); |
| 227 | phdr.p_offset = cpu_convert_to_target32(offset, endian); |
| 228 | phdr.p_paddr = cpu_convert_to_target32(memory_mapping->phys_addr, endian); |
| 229 | if (offset == -1) { |
| 230 | /* When the memory is not stored into vmcore, offset will be -1 */ |
| 231 | phdr.p_filesz = 0; |
| 232 | } else { |
| 233 | phdr.p_filesz = cpu_convert_to_target32(memory_mapping->length, endian); |
| 234 | } |
| 235 | phdr.p_memsz = cpu_convert_to_target32(memory_mapping->length, endian); |
| 236 | phdr.p_vaddr = cpu_convert_to_target32(memory_mapping->virt_addr, endian); |
| 237 | |
| 238 | ret = fd_write_vmcore(&phdr, sizeof(Elf32_Phdr), s); |
| 239 | if (ret < 0) { |
| 240 | dump_error(s, "dump: failed to write program header table.\n"); |
| 241 | return -1; |
| 242 | } |
| 243 | |
| 244 | return 0; |
| 245 | } |
| 246 | |
| 247 | static int write_elf64_note(DumpState *s) |
| 248 | { |
| 249 | Elf64_Phdr phdr; |
| 250 | int endian = s->dump_info.d_endian; |
| 251 | target_phys_addr_t begin = s->memory_offset - s->note_size; |
| 252 | int ret; |
| 253 | |
| 254 | memset(&phdr, 0, sizeof(Elf64_Phdr)); |
| 255 | phdr.p_type = cpu_convert_to_target32(PT_NOTE, endian); |
| 256 | phdr.p_offset = cpu_convert_to_target64(begin, endian); |
| 257 | phdr.p_paddr = 0; |
| 258 | phdr.p_filesz = cpu_convert_to_target64(s->note_size, endian); |
| 259 | phdr.p_memsz = cpu_convert_to_target64(s->note_size, endian); |
| 260 | phdr.p_vaddr = 0; |
| 261 | |
| 262 | ret = fd_write_vmcore(&phdr, sizeof(Elf64_Phdr), s); |
| 263 | if (ret < 0) { |
| 264 | dump_error(s, "dump: failed to write program header table.\n"); |
| 265 | return -1; |
| 266 | } |
| 267 | |
| 268 | return 0; |
| 269 | } |
| 270 | |
| 271 | static int write_elf64_notes(DumpState *s) |
| 272 | { |
| 273 | CPUArchState *env; |
| 274 | int ret; |
| 275 | int id; |
| 276 | |
| 277 | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
| 278 | id = cpu_index(env); |
| 279 | ret = cpu_write_elf64_note(fd_write_vmcore, env, id, s); |
| 280 | if (ret < 0) { |
| 281 | dump_error(s, "dump: failed to write elf notes.\n"); |
| 282 | return -1; |
| 283 | } |
| 284 | } |
| 285 | |
| 286 | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
| 287 | ret = cpu_write_elf64_qemunote(fd_write_vmcore, env, s); |
| 288 | if (ret < 0) { |
| 289 | dump_error(s, "dump: failed to write CPU status.\n"); |
| 290 | return -1; |
| 291 | } |
| 292 | } |
| 293 | |
| 294 | return 0; |
| 295 | } |
| 296 | |
| 297 | static int write_elf32_note(DumpState *s) |
| 298 | { |
| 299 | target_phys_addr_t begin = s->memory_offset - s->note_size; |
| 300 | Elf32_Phdr phdr; |
| 301 | int endian = s->dump_info.d_endian; |
| 302 | int ret; |
| 303 | |
| 304 | memset(&phdr, 0, sizeof(Elf32_Phdr)); |
| 305 | phdr.p_type = cpu_convert_to_target32(PT_NOTE, endian); |
| 306 | phdr.p_offset = cpu_convert_to_target32(begin, endian); |
| 307 | phdr.p_paddr = 0; |
| 308 | phdr.p_filesz = cpu_convert_to_target32(s->note_size, endian); |
| 309 | phdr.p_memsz = cpu_convert_to_target32(s->note_size, endian); |
| 310 | phdr.p_vaddr = 0; |
| 311 | |
| 312 | ret = fd_write_vmcore(&phdr, sizeof(Elf32_Phdr), s); |
| 313 | if (ret < 0) { |
| 314 | dump_error(s, "dump: failed to write program header table.\n"); |
| 315 | return -1; |
| 316 | } |
| 317 | |
| 318 | return 0; |
| 319 | } |
| 320 | |
| 321 | static int write_elf32_notes(DumpState *s) |
| 322 | { |
| 323 | CPUArchState *env; |
| 324 | int ret; |
| 325 | int id; |
| 326 | |
| 327 | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
| 328 | id = cpu_index(env); |
| 329 | ret = cpu_write_elf32_note(fd_write_vmcore, env, id, s); |
| 330 | if (ret < 0) { |
| 331 | dump_error(s, "dump: failed to write elf notes.\n"); |
| 332 | return -1; |
| 333 | } |
| 334 | } |
| 335 | |
| 336 | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
| 337 | ret = cpu_write_elf32_qemunote(fd_write_vmcore, env, s); |
| 338 | if (ret < 0) { |
| 339 | dump_error(s, "dump: failed to write CPU status.\n"); |
| 340 | return -1; |
| 341 | } |
| 342 | } |
| 343 | |
| 344 | return 0; |
| 345 | } |
| 346 | |
| 347 | static int write_elf_section(DumpState *s, int type) |
| 348 | { |
| 349 | Elf32_Shdr shdr32; |
| 350 | Elf64_Shdr shdr64; |
| 351 | int endian = s->dump_info.d_endian; |
| 352 | int shdr_size; |
| 353 | void *shdr; |
| 354 | int ret; |
| 355 | |
| 356 | if (type == 0) { |
| 357 | shdr_size = sizeof(Elf32_Shdr); |
| 358 | memset(&shdr32, 0, shdr_size); |
| 359 | shdr32.sh_info = cpu_convert_to_target32(s->sh_info, endian); |
| 360 | shdr = &shdr32; |
| 361 | } else { |
| 362 | shdr_size = sizeof(Elf64_Shdr); |
| 363 | memset(&shdr64, 0, shdr_size); |
| 364 | shdr64.sh_info = cpu_convert_to_target32(s->sh_info, endian); |
| 365 | shdr = &shdr64; |
| 366 | } |
| 367 | |
| 368 | ret = fd_write_vmcore(&shdr, shdr_size, s); |
| 369 | if (ret < 0) { |
| 370 | dump_error(s, "dump: failed to write section header table.\n"); |
| 371 | return -1; |
| 372 | } |
| 373 | |
| 374 | return 0; |
| 375 | } |
| 376 | |
| 377 | static int write_data(DumpState *s, void *buf, int length) |
| 378 | { |
| 379 | int ret; |
| 380 | |
| 381 | ret = fd_write_vmcore(buf, length, s); |
| 382 | if (ret < 0) { |
| 383 | dump_error(s, "dump: failed to save memory.\n"); |
| 384 | return -1; |
| 385 | } |
| 386 | |
| 387 | return 0; |
| 388 | } |
| 389 | |
| 390 | /* write the memroy to vmcore. 1 page per I/O. */ |
| 391 | static int write_memory(DumpState *s, RAMBlock *block, ram_addr_t start, |
| 392 | int64_t size) |
| 393 | { |
| 394 | int64_t i; |
| 395 | int ret; |
| 396 | |
| 397 | for (i = 0; i < size / TARGET_PAGE_SIZE; i++) { |
| 398 | ret = write_data(s, block->host + start + i * TARGET_PAGE_SIZE, |
| 399 | TARGET_PAGE_SIZE); |
| 400 | if (ret < 0) { |
| 401 | return ret; |
| 402 | } |
| 403 | } |
| 404 | |
| 405 | if ((size % TARGET_PAGE_SIZE) != 0) { |
| 406 | ret = write_data(s, block->host + start + i * TARGET_PAGE_SIZE, |
| 407 | size % TARGET_PAGE_SIZE); |
| 408 | if (ret < 0) { |
| 409 | return ret; |
| 410 | } |
| 411 | } |
| 412 | |
| 413 | return 0; |
| 414 | } |
| 415 | |
| 416 | /* get the memory's offset in the vmcore */ |
| 417 | static target_phys_addr_t get_offset(target_phys_addr_t phys_addr, |
| 418 | DumpState *s) |
| 419 | { |
| 420 | RAMBlock *block; |
| 421 | target_phys_addr_t offset = s->memory_offset; |
| 422 | int64_t size_in_block, start; |
| 423 | |
| 424 | if (s->has_filter) { |
| 425 | if (phys_addr < s->begin || phys_addr >= s->begin + s->length) { |
| 426 | return -1; |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | QLIST_FOREACH(block, &ram_list.blocks, next) { |
| 431 | if (s->has_filter) { |
| 432 | if (block->offset >= s->begin + s->length || |
| 433 | block->offset + block->length <= s->begin) { |
| 434 | /* This block is out of the range */ |
| 435 | continue; |
| 436 | } |
| 437 | |
| 438 | if (s->begin <= block->offset) { |
| 439 | start = block->offset; |
| 440 | } else { |
| 441 | start = s->begin; |
| 442 | } |
| 443 | |
| 444 | size_in_block = block->length - (start - block->offset); |
| 445 | if (s->begin + s->length < block->offset + block->length) { |
| 446 | size_in_block -= block->offset + block->length - |
| 447 | (s->begin + s->length); |
| 448 | } |
| 449 | } else { |
| 450 | start = block->offset; |
| 451 | size_in_block = block->length; |
| 452 | } |
| 453 | |
| 454 | if (phys_addr >= start && phys_addr < start + size_in_block) { |
| 455 | return phys_addr - start + offset; |
| 456 | } |
| 457 | |
| 458 | offset += size_in_block; |
| 459 | } |
| 460 | |
| 461 | return -1; |
| 462 | } |
| 463 | |
| 464 | static int write_elf_loads(DumpState *s) |
| 465 | { |
| 466 | target_phys_addr_t offset; |
| 467 | MemoryMapping *memory_mapping; |
| 468 | uint32_t phdr_index = 1; |
| 469 | int ret; |
| 470 | uint32_t max_index; |
| 471 | |
| 472 | if (s->have_section) { |
| 473 | max_index = s->sh_info; |
| 474 | } else { |
| 475 | max_index = s->phdr_num; |
| 476 | } |
| 477 | |
| 478 | QTAILQ_FOREACH(memory_mapping, &s->list.head, next) { |
| 479 | offset = get_offset(memory_mapping->phys_addr, s); |
| 480 | if (s->dump_info.d_class == ELFCLASS64) { |
| 481 | ret = write_elf64_load(s, memory_mapping, phdr_index++, offset); |
| 482 | } else { |
| 483 | ret = write_elf32_load(s, memory_mapping, phdr_index++, offset); |
| 484 | } |
| 485 | |
| 486 | if (ret < 0) { |
| 487 | return -1; |
| 488 | } |
| 489 | |
| 490 | if (phdr_index >= max_index) { |
| 491 | break; |
| 492 | } |
| 493 | } |
| 494 | |
| 495 | return 0; |
| 496 | } |
| 497 | |
| 498 | /* write elf header, PT_NOTE and elf note to vmcore. */ |
| 499 | static int dump_begin(DumpState *s) |
| 500 | { |
| 501 | int ret; |
| 502 | |
| 503 | /* |
| 504 | * the vmcore's format is: |
| 505 | * -------------- |
| 506 | * | elf header | |
| 507 | * -------------- |
| 508 | * | PT_NOTE | |
| 509 | * -------------- |
| 510 | * | PT_LOAD | |
| 511 | * -------------- |
| 512 | * | ...... | |
| 513 | * -------------- |
| 514 | * | PT_LOAD | |
| 515 | * -------------- |
| 516 | * | sec_hdr | |
| 517 | * -------------- |
| 518 | * | elf note | |
| 519 | * -------------- |
| 520 | * | memory | |
| 521 | * -------------- |
| 522 | * |
| 523 | * we only know where the memory is saved after we write elf note into |
| 524 | * vmcore. |
| 525 | */ |
| 526 | |
| 527 | /* write elf header to vmcore */ |
| 528 | if (s->dump_info.d_class == ELFCLASS64) { |
| 529 | ret = write_elf64_header(s); |
| 530 | } else { |
| 531 | ret = write_elf32_header(s); |
| 532 | } |
| 533 | if (ret < 0) { |
| 534 | return -1; |
| 535 | } |
| 536 | |
| 537 | if (s->dump_info.d_class == ELFCLASS64) { |
| 538 | /* write PT_NOTE to vmcore */ |
| 539 | if (write_elf64_note(s) < 0) { |
| 540 | return -1; |
| 541 | } |
| 542 | |
| 543 | /* write all PT_LOAD to vmcore */ |
| 544 | if (write_elf_loads(s) < 0) { |
| 545 | return -1; |
| 546 | } |
| 547 | |
| 548 | /* write section to vmcore */ |
| 549 | if (s->have_section) { |
| 550 | if (write_elf_section(s, 1) < 0) { |
| 551 | return -1; |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | /* write notes to vmcore */ |
| 556 | if (write_elf64_notes(s) < 0) { |
| 557 | return -1; |
| 558 | } |
| 559 | |
| 560 | } else { |
| 561 | /* write PT_NOTE to vmcore */ |
| 562 | if (write_elf32_note(s) < 0) { |
| 563 | return -1; |
| 564 | } |
| 565 | |
| 566 | /* write all PT_LOAD to vmcore */ |
| 567 | if (write_elf_loads(s) < 0) { |
| 568 | return -1; |
| 569 | } |
| 570 | |
| 571 | /* write section to vmcore */ |
| 572 | if (s->have_section) { |
| 573 | if (write_elf_section(s, 0) < 0) { |
| 574 | return -1; |
| 575 | } |
| 576 | } |
| 577 | |
| 578 | /* write notes to vmcore */ |
| 579 | if (write_elf32_notes(s) < 0) { |
| 580 | return -1; |
| 581 | } |
| 582 | } |
| 583 | |
| 584 | return 0; |
| 585 | } |
| 586 | |
| 587 | /* write PT_LOAD to vmcore */ |
| 588 | static int dump_completed(DumpState *s) |
| 589 | { |
| 590 | dump_cleanup(s); |
| 591 | return 0; |
| 592 | } |
| 593 | |
| 594 | static int get_next_block(DumpState *s, RAMBlock *block) |
| 595 | { |
| 596 | while (1) { |
| 597 | block = QLIST_NEXT(block, next); |
| 598 | if (!block) { |
| 599 | /* no more block */ |
| 600 | return 1; |
| 601 | } |
| 602 | |
| 603 | s->start = 0; |
| 604 | s->block = block; |
| 605 | if (s->has_filter) { |
| 606 | if (block->offset >= s->begin + s->length || |
| 607 | block->offset + block->length <= s->begin) { |
| 608 | /* This block is out of the range */ |
| 609 | continue; |
| 610 | } |
| 611 | |
| 612 | if (s->begin > block->offset) { |
| 613 | s->start = s->begin - block->offset; |
| 614 | } |
| 615 | } |
| 616 | |
| 617 | return 0; |
| 618 | } |
| 619 | } |
| 620 | |
| 621 | /* write all memory to vmcore */ |
| 622 | static int dump_iterate(DumpState *s) |
| 623 | { |
| 624 | RAMBlock *block; |
| 625 | int64_t size; |
| 626 | int ret; |
| 627 | |
| 628 | while (1) { |
| 629 | block = s->block; |
| 630 | |
| 631 | size = block->length; |
| 632 | if (s->has_filter) { |
| 633 | size -= s->start; |
| 634 | if (s->begin + s->length < block->offset + block->length) { |
| 635 | size -= block->offset + block->length - (s->begin + s->length); |
| 636 | } |
| 637 | } |
| 638 | ret = write_memory(s, block, s->start, size); |
| 639 | if (ret == -1) { |
| 640 | return ret; |
| 641 | } |
| 642 | |
| 643 | ret = get_next_block(s, block); |
| 644 | if (ret == 1) { |
| 645 | dump_completed(s); |
| 646 | return 0; |
| 647 | } |
| 648 | } |
| 649 | } |
| 650 | |
| 651 | static int create_vmcore(DumpState *s) |
| 652 | { |
| 653 | int ret; |
| 654 | |
| 655 | ret = dump_begin(s); |
| 656 | if (ret < 0) { |
| 657 | return -1; |
| 658 | } |
| 659 | |
| 660 | ret = dump_iterate(s); |
| 661 | if (ret < 0) { |
| 662 | return -1; |
| 663 | } |
| 664 | |
| 665 | return 0; |
| 666 | } |
| 667 | |
| 668 | static ram_addr_t get_start_block(DumpState *s) |
| 669 | { |
| 670 | RAMBlock *block; |
| 671 | |
| 672 | if (!s->has_filter) { |
| 673 | s->block = QLIST_FIRST(&ram_list.blocks); |
| 674 | return 0; |
| 675 | } |
| 676 | |
| 677 | QLIST_FOREACH(block, &ram_list.blocks, next) { |
| 678 | if (block->offset >= s->begin + s->length || |
| 679 | block->offset + block->length <= s->begin) { |
| 680 | /* This block is out of the range */ |
| 681 | continue; |
| 682 | } |
| 683 | |
| 684 | s->block = block; |
| 685 | if (s->begin > block->offset) { |
| 686 | s->start = s->begin - block->offset; |
| 687 | } else { |
| 688 | s->start = 0; |
| 689 | } |
| 690 | return s->start; |
| 691 | } |
| 692 | |
| 693 | return -1; |
| 694 | } |
| 695 | |
| 696 | static int dump_init(DumpState *s, int fd, bool paging, bool has_filter, |
| 697 | int64_t begin, int64_t length, Error **errp) |
| 698 | { |
| 699 | CPUArchState *env; |
| 700 | int nr_cpus; |
| 701 | int ret; |
| 702 | |
| 703 | if (runstate_is_running()) { |
| 704 | vm_stop(RUN_STATE_SAVE_VM); |
| 705 | s->resume = true; |
| 706 | } else { |
| 707 | s->resume = false; |
| 708 | } |
| 709 | |
| 710 | s->errp = errp; |
| 711 | s->fd = fd; |
| 712 | s->has_filter = has_filter; |
| 713 | s->begin = begin; |
| 714 | s->length = length; |
| 715 | s->start = get_start_block(s); |
| 716 | if (s->start == -1) { |
| 717 | error_set(errp, QERR_INVALID_PARAMETER, "begin"); |
| 718 | goto cleanup; |
| 719 | } |
| 720 | |
| 721 | /* |
| 722 | * get dump info: endian, class and architecture. |
| 723 | * If the target architecture is not supported, cpu_get_dump_info() will |
| 724 | * return -1. |
| 725 | * |
| 726 | * if we use kvm, we should synchronize the register before we get dump |
| 727 | * info. |
| 728 | */ |
| 729 | nr_cpus = 0; |
| 730 | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
| 731 | cpu_synchronize_state(env); |
| 732 | nr_cpus++; |
| 733 | } |
| 734 | |
| 735 | ret = cpu_get_dump_info(&s->dump_info); |
| 736 | if (ret < 0) { |
| 737 | error_set(errp, QERR_UNSUPPORTED); |
| 738 | goto cleanup; |
| 739 | } |
| 740 | |
Paolo Bonzini | 4720bd0 | 2012-06-07 08:48:09 +0200 | [diff] [blame] | 741 | s->note_size = cpu_get_note_size(s->dump_info.d_class, |
| 742 | s->dump_info.d_machine, nr_cpus); |
| 743 | if (ret < 0) { |
| 744 | error_set(errp, QERR_UNSUPPORTED); |
| 745 | goto cleanup; |
| 746 | } |
| 747 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 748 | /* get memory mapping */ |
| 749 | memory_mapping_list_init(&s->list); |
| 750 | if (paging) { |
| 751 | qemu_get_guest_memory_mapping(&s->list); |
| 752 | } else { |
| 753 | qemu_get_guest_simple_memory_mapping(&s->list); |
| 754 | } |
| 755 | |
| 756 | if (s->has_filter) { |
| 757 | memory_mapping_filter(&s->list, s->begin, s->length); |
| 758 | } |
| 759 | |
| 760 | /* |
| 761 | * calculate phdr_num |
| 762 | * |
| 763 | * the type of ehdr->e_phnum is uint16_t, so we should avoid overflow |
| 764 | */ |
| 765 | s->phdr_num = 1; /* PT_NOTE */ |
| 766 | if (s->list.num < UINT16_MAX - 2) { |
| 767 | s->phdr_num += s->list.num; |
| 768 | s->have_section = false; |
| 769 | } else { |
| 770 | s->have_section = true; |
| 771 | s->phdr_num = PN_XNUM; |
| 772 | s->sh_info = 1; /* PT_NOTE */ |
| 773 | |
| 774 | /* the type of shdr->sh_info is uint32_t, so we should avoid overflow */ |
| 775 | if (s->list.num <= UINT32_MAX - 1) { |
| 776 | s->sh_info += s->list.num; |
| 777 | } else { |
| 778 | s->sh_info = UINT32_MAX; |
| 779 | } |
| 780 | } |
| 781 | |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 782 | if (s->dump_info.d_class == ELFCLASS64) { |
| 783 | if (s->have_section) { |
| 784 | s->memory_offset = sizeof(Elf64_Ehdr) + |
| 785 | sizeof(Elf64_Phdr) * s->sh_info + |
| 786 | sizeof(Elf64_Shdr) + s->note_size; |
| 787 | } else { |
| 788 | s->memory_offset = sizeof(Elf64_Ehdr) + |
| 789 | sizeof(Elf64_Phdr) * s->phdr_num + s->note_size; |
| 790 | } |
| 791 | } else { |
| 792 | if (s->have_section) { |
| 793 | s->memory_offset = sizeof(Elf32_Ehdr) + |
| 794 | sizeof(Elf32_Phdr) * s->sh_info + |
| 795 | sizeof(Elf32_Shdr) + s->note_size; |
| 796 | } else { |
| 797 | s->memory_offset = sizeof(Elf32_Ehdr) + |
| 798 | sizeof(Elf32_Phdr) * s->phdr_num + s->note_size; |
| 799 | } |
| 800 | } |
| 801 | |
| 802 | return 0; |
| 803 | |
| 804 | cleanup: |
| 805 | if (s->resume) { |
| 806 | vm_start(); |
| 807 | } |
| 808 | |
| 809 | return -1; |
| 810 | } |
| 811 | |
| 812 | void qmp_dump_guest_memory(bool paging, const char *file, bool has_begin, |
| 813 | int64_t begin, bool has_length, int64_t length, |
| 814 | Error **errp) |
| 815 | { |
| 816 | const char *p; |
| 817 | int fd = -1; |
| 818 | DumpState *s; |
| 819 | int ret; |
| 820 | |
| 821 | if (has_begin && !has_length) { |
| 822 | error_set(errp, QERR_MISSING_PARAMETER, "length"); |
| 823 | return; |
| 824 | } |
| 825 | if (!has_begin && has_length) { |
| 826 | error_set(errp, QERR_MISSING_PARAMETER, "begin"); |
| 827 | return; |
| 828 | } |
| 829 | |
| 830 | #if !defined(WIN32) |
| 831 | if (strstart(file, "fd:", &p)) { |
Paolo Bonzini | a9940fc | 2012-09-20 16:50:32 +0200 | [diff] [blame] | 832 | fd = monitor_get_fd(cur_mon, p, errp); |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 833 | if (fd == -1) { |
Wen Congyang | 783e9b4 | 2012-05-07 12:10:47 +0800 | [diff] [blame] | 834 | return; |
| 835 | } |
| 836 | } |
| 837 | #endif |
| 838 | |
| 839 | if (strstart(file, "file:", &p)) { |
| 840 | fd = qemu_open(p, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, S_IRUSR); |
| 841 | if (fd < 0) { |
| 842 | error_set(errp, QERR_OPEN_FILE_FAILED, p); |
| 843 | return; |
| 844 | } |
| 845 | } |
| 846 | |
| 847 | if (fd == -1) { |
| 848 | error_set(errp, QERR_INVALID_PARAMETER, "protocol"); |
| 849 | return; |
| 850 | } |
| 851 | |
| 852 | s = g_malloc(sizeof(DumpState)); |
| 853 | |
| 854 | ret = dump_init(s, fd, paging, has_begin, begin, length, errp); |
| 855 | if (ret < 0) { |
| 856 | g_free(s); |
| 857 | return; |
| 858 | } |
| 859 | |
| 860 | if (create_vmcore(s) < 0 && !error_is_set(s->errp)) { |
| 861 | error_set(errp, QERR_IO_ERROR); |
| 862 | } |
| 863 | |
| 864 | g_free(s); |
| 865 | } |