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/*
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* QEMU dump
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*
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* Copyright Fujitsu, Corp. 2011, 2012
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*
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* Authors:
|
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* Wen Congyang <wency@cn.fujitsu.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#include "qemu-common.h" |
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#include "elf.h" |
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#include "cpu.h" |
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#include "exec/cpu-all.h" |
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#include "exec/hwaddr.h" |
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#include "monitor/monitor.h" |
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#include "sysemu/kvm.h" |
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#include "sysemu/dump.h" |
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#include "sysemu/sysemu.h" |
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#include "sysemu/memory_mapping.h" |
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#include "sysemu/cpus.h" |
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#include "qapi/error.h" |
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#include "qmp-commands.h" |
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|
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static uint16_t cpu_convert_to_target16(uint16_t val, int endian) |
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{
|
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if (endian == ELFDATA2LSB) {
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val = cpu_to_le16(val); |
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} else {
|
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val = cpu_to_be16(val); |
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} |
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|
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return val;
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} |
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|
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static uint32_t cpu_convert_to_target32(uint32_t val, int endian) |
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{
|
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if (endian == ELFDATA2LSB) {
|
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val = cpu_to_le32(val); |
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} else {
|
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val = cpu_to_be32(val); |
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} |
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|
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return val;
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} |
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|
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static uint64_t cpu_convert_to_target64(uint64_t val, int endian) |
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{
|
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if (endian == ELFDATA2LSB) {
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val = cpu_to_le64(val); |
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} else {
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val = cpu_to_be64(val); |
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} |
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|
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return val;
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} |
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|
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typedef struct DumpState { |
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ArchDumpInfo dump_info; |
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MemoryMappingList list; |
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uint16_t phdr_num; |
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uint32_t sh_info; |
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bool have_section;
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bool resume;
|
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size_t note_size; |
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hwaddr memory_offset; |
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int fd;
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|
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RAMBlock *block; |
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ram_addr_t start; |
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bool has_filter;
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int64_t begin; |
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int64_t length; |
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Error **errp; |
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} DumpState; |
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|
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static int dump_cleanup(DumpState *s) |
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{
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int ret = 0; |
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|
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memory_mapping_list_free(&s->list); |
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if (s->fd != -1) { |
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close(s->fd); |
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} |
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if (s->resume) {
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vm_start(); |
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} |
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|
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return ret;
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} |
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|
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static void dump_error(DumpState *s, const char *reason) |
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{
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dump_cleanup(s); |
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} |
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|
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static int fd_write_vmcore(void *buf, size_t size, void *opaque) |
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{
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DumpState *s = opaque; |
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size_t written_size; |
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|
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written_size = qemu_write_full(s->fd, buf, size); |
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if (written_size != size) {
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return -1; |
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} |
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return 0; |
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} |
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|
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static int write_elf64_header(DumpState *s) |
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{
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Elf64_Ehdr elf_header; |
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int ret;
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int endian = s->dump_info.d_endian;
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|
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memset(&elf_header, 0, sizeof(Elf64_Ehdr)); |
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memcpy(&elf_header, ELFMAG, SELFMAG); |
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elf_header.e_ident[EI_CLASS] = ELFCLASS64; |
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elf_header.e_ident[EI_DATA] = s->dump_info.d_endian; |
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elf_header.e_ident[EI_VERSION] = EV_CURRENT; |
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elf_header.e_type = cpu_convert_to_target16(ET_CORE, endian); |
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elf_header.e_machine = cpu_convert_to_target16(s->dump_info.d_machine, |
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endian); |
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elf_header.e_version = cpu_convert_to_target32(EV_CURRENT, endian); |
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elf_header.e_ehsize = cpu_convert_to_target16(sizeof(elf_header), endian);
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elf_header.e_phoff = cpu_convert_to_target64(sizeof(Elf64_Ehdr), endian);
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elf_header.e_phentsize = cpu_convert_to_target16(sizeof(Elf64_Phdr),
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endian); |
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elf_header.e_phnum = cpu_convert_to_target16(s->phdr_num, endian); |
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if (s->have_section) {
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uint64_t shoff = sizeof(Elf64_Ehdr) + sizeof(Elf64_Phdr) * s->sh_info; |
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elf_header.e_shoff = cpu_convert_to_target64(shoff, endian); |
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elf_header.e_shentsize = cpu_convert_to_target16(sizeof(Elf64_Shdr),
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endian); |
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elf_header.e_shnum = cpu_convert_to_target16(1, endian);
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} |
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ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s);
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if (ret < 0) { |
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dump_error(s, "dump: failed to write elf header.\n");
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return -1; |
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} |
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return 0; |
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} |
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|
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static int write_elf32_header(DumpState *s) |
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{
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Elf32_Ehdr elf_header; |
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int ret;
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int endian = s->dump_info.d_endian;
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memset(&elf_header, 0, sizeof(Elf32_Ehdr)); |
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memcpy(&elf_header, ELFMAG, SELFMAG); |
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elf_header.e_ident[EI_CLASS] = ELFCLASS32; |
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elf_header.e_ident[EI_DATA] = endian; |
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elf_header.e_ident[EI_VERSION] = EV_CURRENT; |
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elf_header.e_type = cpu_convert_to_target16(ET_CORE, endian); |
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elf_header.e_machine = cpu_convert_to_target16(s->dump_info.d_machine, |
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endian); |
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elf_header.e_version = cpu_convert_to_target32(EV_CURRENT, endian); |
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elf_header.e_ehsize = cpu_convert_to_target16(sizeof(elf_header), endian);
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elf_header.e_phoff = cpu_convert_to_target32(sizeof(Elf32_Ehdr), endian);
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elf_header.e_phentsize = cpu_convert_to_target16(sizeof(Elf32_Phdr),
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endian); |
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elf_header.e_phnum = cpu_convert_to_target16(s->phdr_num, endian); |
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if (s->have_section) {
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uint32_t shoff = sizeof(Elf32_Ehdr) + sizeof(Elf32_Phdr) * s->sh_info; |
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elf_header.e_shoff = cpu_convert_to_target32(shoff, endian); |
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elf_header.e_shentsize = cpu_convert_to_target16(sizeof(Elf32_Shdr),
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endian); |
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elf_header.e_shnum = cpu_convert_to_target16(1, endian);
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} |
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|
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ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s);
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if (ret < 0) { |
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dump_error(s, "dump: failed to write elf header.\n");
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return -1; |
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} |
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|
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return 0; |
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} |
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|
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static int write_elf64_load(DumpState *s, MemoryMapping *memory_mapping, |
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int phdr_index, hwaddr offset)
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{
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Elf64_Phdr phdr; |
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int ret;
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int endian = s->dump_info.d_endian;
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|
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memset(&phdr, 0, sizeof(Elf64_Phdr)); |
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phdr.p_type = cpu_convert_to_target32(PT_LOAD, endian); |
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phdr.p_offset = cpu_convert_to_target64(offset, endian); |
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phdr.p_paddr = cpu_convert_to_target64(memory_mapping->phys_addr, endian); |
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if (offset == -1) { |
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/* When the memory is not stored into vmcore, offset will be -1 */
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phdr.p_filesz = 0;
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} else {
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phdr.p_filesz = cpu_convert_to_target64(memory_mapping->length, endian); |
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} |
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phdr.p_memsz = cpu_convert_to_target64(memory_mapping->length, endian); |
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phdr.p_vaddr = cpu_convert_to_target64(memory_mapping->virt_addr, endian); |
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ret = fd_write_vmcore(&phdr, sizeof(Elf64_Phdr), s);
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if (ret < 0) { |
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dump_error(s, "dump: failed to write program header table.\n");
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return -1; |
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} |
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|
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return 0; |
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} |
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|
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static int write_elf32_load(DumpState *s, MemoryMapping *memory_mapping, |
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int phdr_index, hwaddr offset)
|
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{
|
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Elf32_Phdr phdr; |
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int ret;
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int endian = s->dump_info.d_endian;
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|
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memset(&phdr, 0, sizeof(Elf32_Phdr)); |
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phdr.p_type = cpu_convert_to_target32(PT_LOAD, endian); |
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phdr.p_offset = cpu_convert_to_target32(offset, endian); |
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phdr.p_paddr = cpu_convert_to_target32(memory_mapping->phys_addr, endian); |
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if (offset == -1) { |
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/* When the memory is not stored into vmcore, offset will be -1 */
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phdr.p_filesz = 0;
|
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} else {
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phdr.p_filesz = cpu_convert_to_target32(memory_mapping->length, endian); |
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} |
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phdr.p_memsz = cpu_convert_to_target32(memory_mapping->length, endian); |
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phdr.p_vaddr = cpu_convert_to_target32(memory_mapping->virt_addr, endian); |
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|
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ret = fd_write_vmcore(&phdr, sizeof(Elf32_Phdr), s);
|
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if (ret < 0) { |
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dump_error(s, "dump: failed to write program header table.\n");
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return -1; |
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} |
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|
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return 0; |
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} |
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|
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static int write_elf64_note(DumpState *s) |
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{
|
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Elf64_Phdr phdr; |
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int endian = s->dump_info.d_endian;
|
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hwaddr begin = s->memory_offset - s->note_size; |
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int ret;
|
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|
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memset(&phdr, 0, sizeof(Elf64_Phdr)); |
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phdr.p_type = cpu_convert_to_target32(PT_NOTE, endian); |
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phdr.p_offset = cpu_convert_to_target64(begin, endian); |
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phdr.p_paddr = 0;
|
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phdr.p_filesz = cpu_convert_to_target64(s->note_size, endian); |
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phdr.p_memsz = cpu_convert_to_target64(s->note_size, endian); |
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phdr.p_vaddr = 0;
|
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|
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ret = fd_write_vmcore(&phdr, sizeof(Elf64_Phdr), s);
|
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if (ret < 0) { |
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dump_error(s, "dump: failed to write program header table.\n");
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return -1; |
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} |
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|
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return 0; |
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} |
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|
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static inline int cpu_index(CPUState *cpu) |
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{
|
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return cpu->cpu_index + 1; |
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} |
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|
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static int write_elf64_notes(DumpState *s) |
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{
|
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CPUArchState *env; |
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CPUState *cpu; |
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int ret;
|
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int id;
|
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|
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for (env = first_cpu; env != NULL; env = env->next_cpu) { |
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cpu = ENV_GET_CPU(env); |
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id = cpu_index(cpu); |
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ret = cpu_write_elf64_note(fd_write_vmcore, cpu, id, s); |
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if (ret < 0) { |
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dump_error(s, "dump: failed to write elf notes.\n");
|
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return -1; |
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} |
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} |
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|
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for (env = first_cpu; env != NULL; env = env->next_cpu) { |
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ret = cpu_write_elf64_qemunote(fd_write_vmcore, cpu, s); |
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if (ret < 0) { |
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dump_error(s, "dump: failed to write CPU status.\n");
|
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return -1; |
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} |
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} |
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|
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return 0; |
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} |
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|
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static int write_elf32_note(DumpState *s) |
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{
|
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hwaddr begin = s->memory_offset - s->note_size; |
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Elf32_Phdr phdr; |
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int endian = s->dump_info.d_endian;
|
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int ret;
|
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|
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memset(&phdr, 0, sizeof(Elf32_Phdr)); |
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phdr.p_type = cpu_convert_to_target32(PT_NOTE, endian); |
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phdr.p_offset = cpu_convert_to_target32(begin, endian); |
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phdr.p_paddr = 0;
|
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phdr.p_filesz = cpu_convert_to_target32(s->note_size, endian); |
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phdr.p_memsz = cpu_convert_to_target32(s->note_size, endian); |
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phdr.p_vaddr = 0;
|
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|
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ret = fd_write_vmcore(&phdr, sizeof(Elf32_Phdr), s);
|
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if (ret < 0) { |
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dump_error(s, "dump: failed to write program header table.\n");
|
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return -1; |
| 323 |
} |
| 324 |
|
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return 0; |
| 326 |
} |
| 327 |
|
| 328 |
static int write_elf32_notes(DumpState *s) |
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{
|
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CPUArchState *env; |
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CPUState *cpu; |
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int ret;
|
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int id;
|
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|
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for (env = first_cpu; env != NULL; env = env->next_cpu) { |
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cpu = ENV_GET_CPU(env); |
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id = cpu_index(cpu); |
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ret = cpu_write_elf32_note(fd_write_vmcore, cpu, id, s); |
| 339 |
if (ret < 0) { |
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dump_error(s, "dump: failed to write elf notes.\n");
|
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return -1; |
| 342 |
} |
| 343 |
} |
| 344 |
|
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for (env = first_cpu; env != NULL; env = env->next_cpu) { |
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ret = cpu_write_elf32_qemunote(fd_write_vmcore, cpu, s); |
| 347 |
if (ret < 0) { |
| 348 |
dump_error(s, "dump: failed to write CPU status.\n");
|
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return -1; |
| 350 |
} |
| 351 |
} |
| 352 |
|
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return 0; |
| 354 |
} |
| 355 |
|
| 356 |
static int write_elf_section(DumpState *s, int type) |
| 357 |
{
|
| 358 |
Elf32_Shdr shdr32; |
| 359 |
Elf64_Shdr shdr64; |
| 360 |
int endian = s->dump_info.d_endian;
|
| 361 |
int shdr_size;
|
| 362 |
void *shdr;
|
| 363 |
int ret;
|
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|
| 365 |
if (type == 0) { |
| 366 |
shdr_size = sizeof(Elf32_Shdr);
|
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memset(&shdr32, 0, shdr_size);
|
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shdr32.sh_info = cpu_convert_to_target32(s->sh_info, endian); |
| 369 |
shdr = &shdr32; |
| 370 |
} else {
|
| 371 |
shdr_size = sizeof(Elf64_Shdr);
|
| 372 |
memset(&shdr64, 0, shdr_size);
|
| 373 |
shdr64.sh_info = cpu_convert_to_target32(s->sh_info, endian); |
| 374 |
shdr = &shdr64; |
| 375 |
} |
| 376 |
|
| 377 |
ret = fd_write_vmcore(&shdr, shdr_size, s); |
| 378 |
if (ret < 0) { |
| 379 |
dump_error(s, "dump: failed to write section header table.\n");
|
| 380 |
return -1; |
| 381 |
} |
| 382 |
|
| 383 |
return 0; |
| 384 |
} |
| 385 |
|
| 386 |
static int write_data(DumpState *s, void *buf, int length) |
| 387 |
{
|
| 388 |
int ret;
|
| 389 |
|
| 390 |
ret = fd_write_vmcore(buf, length, s); |
| 391 |
if (ret < 0) { |
| 392 |
dump_error(s, "dump: failed to save memory.\n");
|
| 393 |
return -1; |
| 394 |
} |
| 395 |
|
| 396 |
return 0; |
| 397 |
} |
| 398 |
|
| 399 |
/* write the memroy to vmcore. 1 page per I/O. */
|
| 400 |
static int write_memory(DumpState *s, RAMBlock *block, ram_addr_t start, |
| 401 |
int64_t size) |
| 402 |
{
|
| 403 |
int64_t i; |
| 404 |
int ret;
|
| 405 |
|
| 406 |
for (i = 0; i < size / TARGET_PAGE_SIZE; i++) { |
| 407 |
ret = write_data(s, block->host + start + i * TARGET_PAGE_SIZE, |
| 408 |
TARGET_PAGE_SIZE); |
| 409 |
if (ret < 0) { |
| 410 |
return ret;
|
| 411 |
} |
| 412 |
} |
| 413 |
|
| 414 |
if ((size % TARGET_PAGE_SIZE) != 0) { |
| 415 |
ret = write_data(s, block->host + start + i * TARGET_PAGE_SIZE, |
| 416 |
size % TARGET_PAGE_SIZE); |
| 417 |
if (ret < 0) { |
| 418 |
return ret;
|
| 419 |
} |
| 420 |
} |
| 421 |
|
| 422 |
return 0; |
| 423 |
} |
| 424 |
|
| 425 |
/* get the memory's offset in the vmcore */
|
| 426 |
static hwaddr get_offset(hwaddr phys_addr,
|
| 427 |
DumpState *s) |
| 428 |
{
|
| 429 |
RAMBlock *block; |
| 430 |
hwaddr offset = s->memory_offset; |
| 431 |
int64_t size_in_block, start; |
| 432 |
|
| 433 |
if (s->has_filter) {
|
| 434 |
if (phys_addr < s->begin || phys_addr >= s->begin + s->length) {
|
| 435 |
return -1; |
| 436 |
} |
| 437 |
} |
| 438 |
|
| 439 |
QTAILQ_FOREACH(block, &ram_list.blocks, next) {
|
| 440 |
if (s->has_filter) {
|
| 441 |
if (block->offset >= s->begin + s->length ||
|
| 442 |
block->offset + block->length <= s->begin) {
|
| 443 |
/* This block is out of the range */
|
| 444 |
continue;
|
| 445 |
} |
| 446 |
|
| 447 |
if (s->begin <= block->offset) {
|
| 448 |
start = block->offset; |
| 449 |
} else {
|
| 450 |
start = s->begin; |
| 451 |
} |
| 452 |
|
| 453 |
size_in_block = block->length - (start - block->offset); |
| 454 |
if (s->begin + s->length < block->offset + block->length) {
|
| 455 |
size_in_block -= block->offset + block->length - |
| 456 |
(s->begin + s->length); |
| 457 |
} |
| 458 |
} else {
|
| 459 |
start = block->offset; |
| 460 |
size_in_block = block->length; |
| 461 |
} |
| 462 |
|
| 463 |
if (phys_addr >= start && phys_addr < start + size_in_block) {
|
| 464 |
return phys_addr - start + offset;
|
| 465 |
} |
| 466 |
|
| 467 |
offset += size_in_block; |
| 468 |
} |
| 469 |
|
| 470 |
return -1; |
| 471 |
} |
| 472 |
|
| 473 |
static int write_elf_loads(DumpState *s) |
| 474 |
{
|
| 475 |
hwaddr offset; |
| 476 |
MemoryMapping *memory_mapping; |
| 477 |
uint32_t phdr_index = 1;
|
| 478 |
int ret;
|
| 479 |
uint32_t max_index; |
| 480 |
|
| 481 |
if (s->have_section) {
|
| 482 |
max_index = s->sh_info; |
| 483 |
} else {
|
| 484 |
max_index = s->phdr_num; |
| 485 |
} |
| 486 |
|
| 487 |
QTAILQ_FOREACH(memory_mapping, &s->list.head, next) {
|
| 488 |
offset = get_offset(memory_mapping->phys_addr, s); |
| 489 |
if (s->dump_info.d_class == ELFCLASS64) {
|
| 490 |
ret = write_elf64_load(s, memory_mapping, phdr_index++, offset); |
| 491 |
} else {
|
| 492 |
ret = write_elf32_load(s, memory_mapping, phdr_index++, offset); |
| 493 |
} |
| 494 |
|
| 495 |
if (ret < 0) { |
| 496 |
return -1; |
| 497 |
} |
| 498 |
|
| 499 |
if (phdr_index >= max_index) {
|
| 500 |
break;
|
| 501 |
} |
| 502 |
} |
| 503 |
|
| 504 |
return 0; |
| 505 |
} |
| 506 |
|
| 507 |
/* write elf header, PT_NOTE and elf note to vmcore. */
|
| 508 |
static int dump_begin(DumpState *s) |
| 509 |
{
|
| 510 |
int ret;
|
| 511 |
|
| 512 |
/*
|
| 513 |
* the vmcore's format is:
|
| 514 |
* --------------
|
| 515 |
* | elf header |
|
| 516 |
* --------------
|
| 517 |
* | PT_NOTE |
|
| 518 |
* --------------
|
| 519 |
* | PT_LOAD |
|
| 520 |
* --------------
|
| 521 |
* | ...... |
|
| 522 |
* --------------
|
| 523 |
* | PT_LOAD |
|
| 524 |
* --------------
|
| 525 |
* | sec_hdr |
|
| 526 |
* --------------
|
| 527 |
* | elf note |
|
| 528 |
* --------------
|
| 529 |
* | memory |
|
| 530 |
* --------------
|
| 531 |
*
|
| 532 |
* we only know where the memory is saved after we write elf note into
|
| 533 |
* vmcore.
|
| 534 |
*/
|
| 535 |
|
| 536 |
/* write elf header to vmcore */
|
| 537 |
if (s->dump_info.d_class == ELFCLASS64) {
|
| 538 |
ret = write_elf64_header(s); |
| 539 |
} else {
|
| 540 |
ret = write_elf32_header(s); |
| 541 |
} |
| 542 |
if (ret < 0) { |
| 543 |
return -1; |
| 544 |
} |
| 545 |
|
| 546 |
if (s->dump_info.d_class == ELFCLASS64) {
|
| 547 |
/* write PT_NOTE to vmcore */
|
| 548 |
if (write_elf64_note(s) < 0) { |
| 549 |
return -1; |
| 550 |
} |
| 551 |
|
| 552 |
/* write all PT_LOAD to vmcore */
|
| 553 |
if (write_elf_loads(s) < 0) { |
| 554 |
return -1; |
| 555 |
} |
| 556 |
|
| 557 |
/* write section to vmcore */
|
| 558 |
if (s->have_section) {
|
| 559 |
if (write_elf_section(s, 1) < 0) { |
| 560 |
return -1; |
| 561 |
} |
| 562 |
} |
| 563 |
|
| 564 |
/* write notes to vmcore */
|
| 565 |
if (write_elf64_notes(s) < 0) { |
| 566 |
return -1; |
| 567 |
} |
| 568 |
|
| 569 |
} else {
|
| 570 |
/* write PT_NOTE to vmcore */
|
| 571 |
if (write_elf32_note(s) < 0) { |
| 572 |
return -1; |
| 573 |
} |
| 574 |
|
| 575 |
/* write all PT_LOAD to vmcore */
|
| 576 |
if (write_elf_loads(s) < 0) { |
| 577 |
return -1; |
| 578 |
} |
| 579 |
|
| 580 |
/* write section to vmcore */
|
| 581 |
if (s->have_section) {
|
| 582 |
if (write_elf_section(s, 0) < 0) { |
| 583 |
return -1; |
| 584 |
} |
| 585 |
} |
| 586 |
|
| 587 |
/* write notes to vmcore */
|
| 588 |
if (write_elf32_notes(s) < 0) { |
| 589 |
return -1; |
| 590 |
} |
| 591 |
} |
| 592 |
|
| 593 |
return 0; |
| 594 |
} |
| 595 |
|
| 596 |
/* write PT_LOAD to vmcore */
|
| 597 |
static int dump_completed(DumpState *s) |
| 598 |
{
|
| 599 |
dump_cleanup(s); |
| 600 |
return 0; |
| 601 |
} |
| 602 |
|
| 603 |
static int get_next_block(DumpState *s, RAMBlock *block) |
| 604 |
{
|
| 605 |
while (1) { |
| 606 |
block = QTAILQ_NEXT(block, next); |
| 607 |
if (!block) {
|
| 608 |
/* no more block */
|
| 609 |
return 1; |
| 610 |
} |
| 611 |
|
| 612 |
s->start = 0;
|
| 613 |
s->block = block; |
| 614 |
if (s->has_filter) {
|
| 615 |
if (block->offset >= s->begin + s->length ||
|
| 616 |
block->offset + block->length <= s->begin) {
|
| 617 |
/* This block is out of the range */
|
| 618 |
continue;
|
| 619 |
} |
| 620 |
|
| 621 |
if (s->begin > block->offset) {
|
| 622 |
s->start = s->begin - block->offset; |
| 623 |
} |
| 624 |
} |
| 625 |
|
| 626 |
return 0; |
| 627 |
} |
| 628 |
} |
| 629 |
|
| 630 |
/* write all memory to vmcore */
|
| 631 |
static int dump_iterate(DumpState *s) |
| 632 |
{
|
| 633 |
RAMBlock *block; |
| 634 |
int64_t size; |
| 635 |
int ret;
|
| 636 |
|
| 637 |
while (1) { |
| 638 |
block = s->block; |
| 639 |
|
| 640 |
size = block->length; |
| 641 |
if (s->has_filter) {
|
| 642 |
size -= s->start; |
| 643 |
if (s->begin + s->length < block->offset + block->length) {
|
| 644 |
size -= block->offset + block->length - (s->begin + s->length); |
| 645 |
} |
| 646 |
} |
| 647 |
ret = write_memory(s, block, s->start, size); |
| 648 |
if (ret == -1) { |
| 649 |
return ret;
|
| 650 |
} |
| 651 |
|
| 652 |
ret = get_next_block(s, block); |
| 653 |
if (ret == 1) { |
| 654 |
dump_completed(s); |
| 655 |
return 0; |
| 656 |
} |
| 657 |
} |
| 658 |
} |
| 659 |
|
| 660 |
static int create_vmcore(DumpState *s) |
| 661 |
{
|
| 662 |
int ret;
|
| 663 |
|
| 664 |
ret = dump_begin(s); |
| 665 |
if (ret < 0) { |
| 666 |
return -1; |
| 667 |
} |
| 668 |
|
| 669 |
ret = dump_iterate(s); |
| 670 |
if (ret < 0) { |
| 671 |
return -1; |
| 672 |
} |
| 673 |
|
| 674 |
return 0; |
| 675 |
} |
| 676 |
|
| 677 |
static ram_addr_t get_start_block(DumpState *s)
|
| 678 |
{
|
| 679 |
RAMBlock *block; |
| 680 |
|
| 681 |
if (!s->has_filter) {
|
| 682 |
s->block = QTAILQ_FIRST(&ram_list.blocks); |
| 683 |
return 0; |
| 684 |
} |
| 685 |
|
| 686 |
QTAILQ_FOREACH(block, &ram_list.blocks, next) {
|
| 687 |
if (block->offset >= s->begin + s->length ||
|
| 688 |
block->offset + block->length <= s->begin) {
|
| 689 |
/* This block is out of the range */
|
| 690 |
continue;
|
| 691 |
} |
| 692 |
|
| 693 |
s->block = block; |
| 694 |
if (s->begin > block->offset) {
|
| 695 |
s->start = s->begin - block->offset; |
| 696 |
} else {
|
| 697 |
s->start = 0;
|
| 698 |
} |
| 699 |
return s->start;
|
| 700 |
} |
| 701 |
|
| 702 |
return -1; |
| 703 |
} |
| 704 |
|
| 705 |
static int dump_init(DumpState *s, int fd, bool paging, bool has_filter, |
| 706 |
int64_t begin, int64_t length, Error **errp) |
| 707 |
{
|
| 708 |
CPUArchState *env; |
| 709 |
int nr_cpus;
|
| 710 |
Error *err = NULL;
|
| 711 |
int ret;
|
| 712 |
|
| 713 |
if (runstate_is_running()) {
|
| 714 |
vm_stop(RUN_STATE_SAVE_VM); |
| 715 |
s->resume = true;
|
| 716 |
} else {
|
| 717 |
s->resume = false;
|
| 718 |
} |
| 719 |
|
| 720 |
s->errp = errp; |
| 721 |
s->fd = fd; |
| 722 |
s->has_filter = has_filter; |
| 723 |
s->begin = begin; |
| 724 |
s->length = length; |
| 725 |
s->start = get_start_block(s); |
| 726 |
if (s->start == -1) { |
| 727 |
error_set(errp, QERR_INVALID_PARAMETER, "begin");
|
| 728 |
goto cleanup;
|
| 729 |
} |
| 730 |
|
| 731 |
/*
|
| 732 |
* get dump info: endian, class and architecture.
|
| 733 |
* If the target architecture is not supported, cpu_get_dump_info() will
|
| 734 |
* return -1.
|
| 735 |
*
|
| 736 |
* If we use KVM, we should synchronize the registers before we get dump
|
| 737 |
* info.
|
| 738 |
*/
|
| 739 |
cpu_synchronize_all_states(); |
| 740 |
nr_cpus = 0;
|
| 741 |
for (env = first_cpu; env != NULL; env = env->next_cpu) { |
| 742 |
nr_cpus++; |
| 743 |
} |
| 744 |
|
| 745 |
ret = cpu_get_dump_info(&s->dump_info); |
| 746 |
if (ret < 0) { |
| 747 |
error_set(errp, QERR_UNSUPPORTED); |
| 748 |
goto cleanup;
|
| 749 |
} |
| 750 |
|
| 751 |
s->note_size = cpu_get_note_size(s->dump_info.d_class, |
| 752 |
s->dump_info.d_machine, nr_cpus); |
| 753 |
if (ret < 0) { |
| 754 |
error_set(errp, QERR_UNSUPPORTED); |
| 755 |
goto cleanup;
|
| 756 |
} |
| 757 |
|
| 758 |
/* get memory mapping */
|
| 759 |
memory_mapping_list_init(&s->list); |
| 760 |
if (paging) {
|
| 761 |
qemu_get_guest_memory_mapping(&s->list, &err); |
| 762 |
if (err != NULL) { |
| 763 |
error_propagate(errp, err); |
| 764 |
goto cleanup;
|
| 765 |
} |
| 766 |
} else {
|
| 767 |
qemu_get_guest_simple_memory_mapping(&s->list); |
| 768 |
} |
| 769 |
|
| 770 |
if (s->has_filter) {
|
| 771 |
memory_mapping_filter(&s->list, s->begin, s->length); |
| 772 |
} |
| 773 |
|
| 774 |
/*
|
| 775 |
* calculate phdr_num
|
| 776 |
*
|
| 777 |
* the type of ehdr->e_phnum is uint16_t, so we should avoid overflow
|
| 778 |
*/
|
| 779 |
s->phdr_num = 1; /* PT_NOTE */ |
| 780 |
if (s->list.num < UINT16_MAX - 2) { |
| 781 |
s->phdr_num += s->list.num; |
| 782 |
s->have_section = false;
|
| 783 |
} else {
|
| 784 |
s->have_section = true;
|
| 785 |
s->phdr_num = PN_XNUM; |
| 786 |
s->sh_info = 1; /* PT_NOTE */ |
| 787 |
|
| 788 |
/* the type of shdr->sh_info is uint32_t, so we should avoid overflow */
|
| 789 |
if (s->list.num <= UINT32_MAX - 1) { |
| 790 |
s->sh_info += s->list.num; |
| 791 |
} else {
|
| 792 |
s->sh_info = UINT32_MAX; |
| 793 |
} |
| 794 |
} |
| 795 |
|
| 796 |
if (s->dump_info.d_class == ELFCLASS64) {
|
| 797 |
if (s->have_section) {
|
| 798 |
s->memory_offset = sizeof(Elf64_Ehdr) +
|
| 799 |
sizeof(Elf64_Phdr) * s->sh_info +
|
| 800 |
sizeof(Elf64_Shdr) + s->note_size;
|
| 801 |
} else {
|
| 802 |
s->memory_offset = sizeof(Elf64_Ehdr) +
|
| 803 |
sizeof(Elf64_Phdr) * s->phdr_num + s->note_size;
|
| 804 |
} |
| 805 |
} else {
|
| 806 |
if (s->have_section) {
|
| 807 |
s->memory_offset = sizeof(Elf32_Ehdr) +
|
| 808 |
sizeof(Elf32_Phdr) * s->sh_info +
|
| 809 |
sizeof(Elf32_Shdr) + s->note_size;
|
| 810 |
} else {
|
| 811 |
s->memory_offset = sizeof(Elf32_Ehdr) +
|
| 812 |
sizeof(Elf32_Phdr) * s->phdr_num + s->note_size;
|
| 813 |
} |
| 814 |
} |
| 815 |
|
| 816 |
return 0; |
| 817 |
|
| 818 |
cleanup:
|
| 819 |
if (s->resume) {
|
| 820 |
vm_start(); |
| 821 |
} |
| 822 |
|
| 823 |
return -1; |
| 824 |
} |
| 825 |
|
| 826 |
void qmp_dump_guest_memory(bool paging, const char *file, bool has_begin, |
| 827 |
int64_t begin, bool has_length, int64_t length,
|
| 828 |
Error **errp) |
| 829 |
{
|
| 830 |
const char *p; |
| 831 |
int fd = -1; |
| 832 |
DumpState *s; |
| 833 |
int ret;
|
| 834 |
|
| 835 |
if (has_begin && !has_length) {
|
| 836 |
error_set(errp, QERR_MISSING_PARAMETER, "length");
|
| 837 |
return;
|
| 838 |
} |
| 839 |
if (!has_begin && has_length) {
|
| 840 |
error_set(errp, QERR_MISSING_PARAMETER, "begin");
|
| 841 |
return;
|
| 842 |
} |
| 843 |
|
| 844 |
#if !defined(WIN32)
|
| 845 |
if (strstart(file, "fd:", &p)) { |
| 846 |
fd = monitor_get_fd(cur_mon, p, errp); |
| 847 |
if (fd == -1) { |
| 848 |
return;
|
| 849 |
} |
| 850 |
} |
| 851 |
#endif
|
| 852 |
|
| 853 |
if (strstart(file, "file:", &p)) { |
| 854 |
fd = qemu_open(p, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, S_IRUSR); |
| 855 |
if (fd < 0) { |
| 856 |
error_setg_file_open(errp, errno, p); |
| 857 |
return;
|
| 858 |
} |
| 859 |
} |
| 860 |
|
| 861 |
if (fd == -1) { |
| 862 |
error_set(errp, QERR_INVALID_PARAMETER, "protocol");
|
| 863 |
return;
|
| 864 |
} |
| 865 |
|
| 866 |
s = g_malloc(sizeof(DumpState));
|
| 867 |
|
| 868 |
ret = dump_init(s, fd, paging, has_begin, begin, length, errp); |
| 869 |
if (ret < 0) { |
| 870 |
g_free(s); |
| 871 |
return;
|
| 872 |
} |
| 873 |
|
| 874 |
if (create_vmcore(s) < 0 && !error_is_set(s->errp)) { |
| 875 |
error_set(errp, QERR_IO_ERROR); |
| 876 |
} |
| 877 |
|
| 878 |
g_free(s); |
| 879 |
} |