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Commit | Line | Data |
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783e9b48 WC |
1 | /* |
2 | * QEMU dump | |
3 | * | |
4 | * Copyright Fujitsu, Corp. 2011, 2012 | |
5 | * | |
6 | * Authors: | |
7 | * Wen Congyang <wency@cn.fujitsu.com> | |
8 | * | |
352666e2 SW |
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. | |
783e9b48 WC |
11 | * |
12 | */ | |
13 | ||
14 | #include "qemu-common.h" | |
783e9b48 | 15 | #include "elf.h" |
783e9b48 | 16 | #include "cpu.h" |
022c62cb PB |
17 | #include "exec/cpu-all.h" |
18 | #include "exec/hwaddr.h" | |
83c9089e | 19 | #include "monitor/monitor.h" |
9c17d615 PB |
20 | #include "sysemu/kvm.h" |
21 | #include "sysemu/dump.h" | |
22 | #include "sysemu/sysemu.h" | |
23 | #include "sysemu/memory_mapping.h" | |
7b1b5d19 | 24 | #include "qapi/error.h" |
783e9b48 | 25 | #include "qmp-commands.h" |
022c62cb | 26 | #include "exec/gdbstub.h" |
783e9b48 | 27 | |
783e9b48 WC |
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; | |
a8170e5e | 69 | hwaddr memory_offset; |
783e9b48 WC |
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; | |
2f61652d LC |
103 | size_t written_size; |
104 | ||
105 | written_size = qemu_write_full(s->fd, buf, size); | |
106 | if (written_size != size) { | |
107 | return -1; | |
783e9b48 WC |
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, | |
a8170e5e | 190 | int phdr_index, hwaddr offset) |
783e9b48 WC |
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, | |
a8170e5e | 219 | int phdr_index, hwaddr offset) |
783e9b48 WC |
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; | |
a8170e5e | 251 | hwaddr begin = s->memory_offset - s->note_size; |
783e9b48 WC |
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 | { | |
a8170e5e | 299 | hwaddr begin = s->memory_offset - s->note_size; |
783e9b48 WC |
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 */ | |
a8170e5e | 417 | static hwaddr get_offset(hwaddr phys_addr, |
783e9b48 WC |
418 | DumpState *s) |
419 | { | |
420 | RAMBlock *block; | |
a8170e5e | 421 | hwaddr offset = s->memory_offset; |
783e9b48 WC |
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 | ||
a3161038 | 430 | QTAILQ_FOREACH(block, &ram_list.blocks, next) { |
783e9b48 WC |
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 | { | |
a8170e5e | 466 | hwaddr offset; |
783e9b48 WC |
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) { | |
a3161038 | 597 | block = QTAILQ_NEXT(block, next); |
783e9b48 WC |
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) { | |
a3161038 | 673 | s->block = QTAILQ_FIRST(&ram_list.blocks); |
783e9b48 WC |
674 | return 0; |
675 | } | |
676 | ||
a3161038 | 677 | QTAILQ_FOREACH(block, &ram_list.blocks, next) { |
783e9b48 WC |
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 | ||
4720bd05 PB |
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 | ||
783e9b48 WC |
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 | ||
783e9b48 WC |
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)) { | |
a9940fc4 | 832 | fd = monitor_get_fd(cur_mon, p, errp); |
783e9b48 | 833 | if (fd == -1) { |
783e9b48 WC |
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 | } |