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https://gitlab.com/qemu-project/qemu
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![Avi Kivity](/assets/img/avatar_default.png)
target_phys_addr_t is unwieldly, violates the C standard (_t suffixes are reserved) and its purpose doesn't match the name (most target_phys_addr_t addresses are not target specific). Replace it with a finger-friendly, standards conformant hwaddr. Outstanding patchsets can be fixed up with the command git rebase -i --exec 'find -name "*.[ch]" | xargs s/target_phys_addr_t/hwaddr/g' origin Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
866 lines
22 KiB
C
866 lines
22 KiB
C
/*
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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 "cpu-all.h"
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#include "hwaddr.h"
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#include "monitor.h"
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#include "kvm.h"
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#include "dump.h"
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#include "sysemu.h"
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#include "memory_mapping.h"
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#include "error.h"
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#include "qmp-commands.h"
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#include "gdbstub.h"
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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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return val;
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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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return val;
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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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return val;
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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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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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static int dump_cleanup(DumpState *s)
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{
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int ret = 0;
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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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return ret;
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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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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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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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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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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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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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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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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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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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return 0;
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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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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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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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return 0;
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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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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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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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return 0;
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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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int ret;
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int id;
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for (env = first_cpu; env != NULL; env = env->next_cpu) {
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id = cpu_index(env);
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ret = cpu_write_elf64_note(fd_write_vmcore, env, 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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for (env = first_cpu; env != NULL; env = env->next_cpu) {
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ret = cpu_write_elf64_qemunote(fd_write_vmcore, env, 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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return 0;
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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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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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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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return 0;
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}
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static int write_elf32_notes(DumpState *s)
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{
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CPUArchState *env;
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int ret;
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int id;
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for (env = first_cpu; env != NULL; env = env->next_cpu) {
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id = cpu_index(env);
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ret = cpu_write_elf32_note(fd_write_vmcore, env, 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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for (env = first_cpu; env != NULL; env = env->next_cpu) {
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ret = cpu_write_elf32_qemunote(fd_write_vmcore, env, 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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return 0;
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}
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static int write_elf_section(DumpState *s, int type)
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{
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Elf32_Shdr shdr32;
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Elf64_Shdr shdr64;
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int endian = s->dump_info.d_endian;
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int shdr_size;
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void *shdr;
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int ret;
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if (type == 0) {
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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);
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shdr = &shdr32;
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} else {
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shdr_size = sizeof(Elf64_Shdr);
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memset(&shdr64, 0, shdr_size);
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shdr64.sh_info = cpu_convert_to_target32(s->sh_info, endian);
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shdr = &shdr64;
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}
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ret = fd_write_vmcore(&shdr, shdr_size, s);
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if (ret < 0) {
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dump_error(s, "dump: failed to write section header table.\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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static int write_data(DumpState *s, void *buf, int length)
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{
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int ret;
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ret = fd_write_vmcore(buf, length, s);
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if (ret < 0) {
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dump_error(s, "dump: failed to save memory.\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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/* write the memroy to vmcore. 1 page per I/O. */
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static int write_memory(DumpState *s, RAMBlock *block, ram_addr_t start,
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int64_t size)
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{
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int64_t i;
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int ret;
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for (i = 0; i < size / TARGET_PAGE_SIZE; i++) {
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ret = write_data(s, block->host + start + i * TARGET_PAGE_SIZE,
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TARGET_PAGE_SIZE);
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if (ret < 0) {
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return ret;
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}
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}
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if ((size % TARGET_PAGE_SIZE) != 0) {
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ret = write_data(s, block->host + start + i * TARGET_PAGE_SIZE,
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size % TARGET_PAGE_SIZE);
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if (ret < 0) {
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return ret;
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}
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}
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return 0;
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}
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/* get the memory's offset in the vmcore */
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static hwaddr get_offset(hwaddr phys_addr,
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DumpState *s)
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{
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RAMBlock *block;
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hwaddr offset = s->memory_offset;
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int64_t size_in_block, start;
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if (s->has_filter) {
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if (phys_addr < s->begin || phys_addr >= s->begin + s->length) {
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return -1;
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}
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}
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QLIST_FOREACH(block, &ram_list.blocks, next) {
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if (s->has_filter) {
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if (block->offset >= s->begin + s->length ||
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block->offset + block->length <= s->begin) {
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/* This block is out of the range */
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continue;
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}
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if (s->begin <= block->offset) {
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start = block->offset;
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} else {
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start = s->begin;
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}
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size_in_block = block->length - (start - block->offset);
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if (s->begin + s->length < block->offset + block->length) {
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size_in_block -= block->offset + block->length -
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(s->begin + s->length);
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}
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} else {
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start = block->offset;
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size_in_block = block->length;
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}
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if (phys_addr >= start && phys_addr < start + size_in_block) {
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return phys_addr - start + offset;
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}
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offset += size_in_block;
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}
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return -1;
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}
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static int write_elf_loads(DumpState *s)
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{
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hwaddr offset;
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MemoryMapping *memory_mapping;
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uint32_t phdr_index = 1;
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int ret;
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uint32_t max_index;
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if (s->have_section) {
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max_index = s->sh_info;
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} else {
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max_index = s->phdr_num;
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}
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QTAILQ_FOREACH(memory_mapping, &s->list.head, next) {
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offset = get_offset(memory_mapping->phys_addr, s);
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if (s->dump_info.d_class == ELFCLASS64) {
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ret = write_elf64_load(s, memory_mapping, phdr_index++, offset);
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} else {
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ret = write_elf32_load(s, memory_mapping, phdr_index++, offset);
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}
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if (ret < 0) {
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return -1;
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|
}
|
|
|
|
if (phdr_index >= max_index) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* write elf header, PT_NOTE and elf note to vmcore. */
|
|
static int dump_begin(DumpState *s)
|
|
{
|
|
int ret;
|
|
|
|
/*
|
|
* the vmcore's format is:
|
|
* --------------
|
|
* | elf header |
|
|
* --------------
|
|
* | PT_NOTE |
|
|
* --------------
|
|
* | PT_LOAD |
|
|
* --------------
|
|
* | ...... |
|
|
* --------------
|
|
* | PT_LOAD |
|
|
* --------------
|
|
* | sec_hdr |
|
|
* --------------
|
|
* | elf note |
|
|
* --------------
|
|
* | memory |
|
|
* --------------
|
|
*
|
|
* we only know where the memory is saved after we write elf note into
|
|
* vmcore.
|
|
*/
|
|
|
|
/* write elf header to vmcore */
|
|
if (s->dump_info.d_class == ELFCLASS64) {
|
|
ret = write_elf64_header(s);
|
|
} else {
|
|
ret = write_elf32_header(s);
|
|
}
|
|
if (ret < 0) {
|
|
return -1;
|
|
}
|
|
|
|
if (s->dump_info.d_class == ELFCLASS64) {
|
|
/* write PT_NOTE to vmcore */
|
|
if (write_elf64_note(s) < 0) {
|
|
return -1;
|
|
}
|
|
|
|
/* write all PT_LOAD to vmcore */
|
|
if (write_elf_loads(s) < 0) {
|
|
return -1;
|
|
}
|
|
|
|
/* write section to vmcore */
|
|
if (s->have_section) {
|
|
if (write_elf_section(s, 1) < 0) {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/* write notes to vmcore */
|
|
if (write_elf64_notes(s) < 0) {
|
|
return -1;
|
|
}
|
|
|
|
} else {
|
|
/* write PT_NOTE to vmcore */
|
|
if (write_elf32_note(s) < 0) {
|
|
return -1;
|
|
}
|
|
|
|
/* write all PT_LOAD to vmcore */
|
|
if (write_elf_loads(s) < 0) {
|
|
return -1;
|
|
}
|
|
|
|
/* write section to vmcore */
|
|
if (s->have_section) {
|
|
if (write_elf_section(s, 0) < 0) {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/* write notes to vmcore */
|
|
if (write_elf32_notes(s) < 0) {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* write PT_LOAD to vmcore */
|
|
static int dump_completed(DumpState *s)
|
|
{
|
|
dump_cleanup(s);
|
|
return 0;
|
|
}
|
|
|
|
static int get_next_block(DumpState *s, RAMBlock *block)
|
|
{
|
|
while (1) {
|
|
block = QLIST_NEXT(block, next);
|
|
if (!block) {
|
|
/* no more block */
|
|
return 1;
|
|
}
|
|
|
|
s->start = 0;
|
|
s->block = block;
|
|
if (s->has_filter) {
|
|
if (block->offset >= s->begin + s->length ||
|
|
block->offset + block->length <= s->begin) {
|
|
/* This block is out of the range */
|
|
continue;
|
|
}
|
|
|
|
if (s->begin > block->offset) {
|
|
s->start = s->begin - block->offset;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* write all memory to vmcore */
|
|
static int dump_iterate(DumpState *s)
|
|
{
|
|
RAMBlock *block;
|
|
int64_t size;
|
|
int ret;
|
|
|
|
while (1) {
|
|
block = s->block;
|
|
|
|
size = block->length;
|
|
if (s->has_filter) {
|
|
size -= s->start;
|
|
if (s->begin + s->length < block->offset + block->length) {
|
|
size -= block->offset + block->length - (s->begin + s->length);
|
|
}
|
|
}
|
|
ret = write_memory(s, block, s->start, size);
|
|
if (ret == -1) {
|
|
return ret;
|
|
}
|
|
|
|
ret = get_next_block(s, block);
|
|
if (ret == 1) {
|
|
dump_completed(s);
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int create_vmcore(DumpState *s)
|
|
{
|
|
int ret;
|
|
|
|
ret = dump_begin(s);
|
|
if (ret < 0) {
|
|
return -1;
|
|
}
|
|
|
|
ret = dump_iterate(s);
|
|
if (ret < 0) {
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static ram_addr_t get_start_block(DumpState *s)
|
|
{
|
|
RAMBlock *block;
|
|
|
|
if (!s->has_filter) {
|
|
s->block = QLIST_FIRST(&ram_list.blocks);
|
|
return 0;
|
|
}
|
|
|
|
QLIST_FOREACH(block, &ram_list.blocks, next) {
|
|
if (block->offset >= s->begin + s->length ||
|
|
block->offset + block->length <= s->begin) {
|
|
/* This block is out of the range */
|
|
continue;
|
|
}
|
|
|
|
s->block = block;
|
|
if (s->begin > block->offset) {
|
|
s->start = s->begin - block->offset;
|
|
} else {
|
|
s->start = 0;
|
|
}
|
|
return s->start;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
static int dump_init(DumpState *s, int fd, bool paging, bool has_filter,
|
|
int64_t begin, int64_t length, Error **errp)
|
|
{
|
|
CPUArchState *env;
|
|
int nr_cpus;
|
|
int ret;
|
|
|
|
if (runstate_is_running()) {
|
|
vm_stop(RUN_STATE_SAVE_VM);
|
|
s->resume = true;
|
|
} else {
|
|
s->resume = false;
|
|
}
|
|
|
|
s->errp = errp;
|
|
s->fd = fd;
|
|
s->has_filter = has_filter;
|
|
s->begin = begin;
|
|
s->length = length;
|
|
s->start = get_start_block(s);
|
|
if (s->start == -1) {
|
|
error_set(errp, QERR_INVALID_PARAMETER, "begin");
|
|
goto cleanup;
|
|
}
|
|
|
|
/*
|
|
* get dump info: endian, class and architecture.
|
|
* If the target architecture is not supported, cpu_get_dump_info() will
|
|
* return -1.
|
|
*
|
|
* if we use kvm, we should synchronize the register before we get dump
|
|
* info.
|
|
*/
|
|
nr_cpus = 0;
|
|
for (env = first_cpu; env != NULL; env = env->next_cpu) {
|
|
cpu_synchronize_state(env);
|
|
nr_cpus++;
|
|
}
|
|
|
|
ret = cpu_get_dump_info(&s->dump_info);
|
|
if (ret < 0) {
|
|
error_set(errp, QERR_UNSUPPORTED);
|
|
goto cleanup;
|
|
}
|
|
|
|
s->note_size = cpu_get_note_size(s->dump_info.d_class,
|
|
s->dump_info.d_machine, nr_cpus);
|
|
if (ret < 0) {
|
|
error_set(errp, QERR_UNSUPPORTED);
|
|
goto cleanup;
|
|
}
|
|
|
|
/* get memory mapping */
|
|
memory_mapping_list_init(&s->list);
|
|
if (paging) {
|
|
qemu_get_guest_memory_mapping(&s->list);
|
|
} else {
|
|
qemu_get_guest_simple_memory_mapping(&s->list);
|
|
}
|
|
|
|
if (s->has_filter) {
|
|
memory_mapping_filter(&s->list, s->begin, s->length);
|
|
}
|
|
|
|
/*
|
|
* calculate phdr_num
|
|
*
|
|
* the type of ehdr->e_phnum is uint16_t, so we should avoid overflow
|
|
*/
|
|
s->phdr_num = 1; /* PT_NOTE */
|
|
if (s->list.num < UINT16_MAX - 2) {
|
|
s->phdr_num += s->list.num;
|
|
s->have_section = false;
|
|
} else {
|
|
s->have_section = true;
|
|
s->phdr_num = PN_XNUM;
|
|
s->sh_info = 1; /* PT_NOTE */
|
|
|
|
/* the type of shdr->sh_info is uint32_t, so we should avoid overflow */
|
|
if (s->list.num <= UINT32_MAX - 1) {
|
|
s->sh_info += s->list.num;
|
|
} else {
|
|
s->sh_info = UINT32_MAX;
|
|
}
|
|
}
|
|
|
|
if (s->dump_info.d_class == ELFCLASS64) {
|
|
if (s->have_section) {
|
|
s->memory_offset = sizeof(Elf64_Ehdr) +
|
|
sizeof(Elf64_Phdr) * s->sh_info +
|
|
sizeof(Elf64_Shdr) + s->note_size;
|
|
} else {
|
|
s->memory_offset = sizeof(Elf64_Ehdr) +
|
|
sizeof(Elf64_Phdr) * s->phdr_num + s->note_size;
|
|
}
|
|
} else {
|
|
if (s->have_section) {
|
|
s->memory_offset = sizeof(Elf32_Ehdr) +
|
|
sizeof(Elf32_Phdr) * s->sh_info +
|
|
sizeof(Elf32_Shdr) + s->note_size;
|
|
} else {
|
|
s->memory_offset = sizeof(Elf32_Ehdr) +
|
|
sizeof(Elf32_Phdr) * s->phdr_num + s->note_size;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
cleanup:
|
|
if (s->resume) {
|
|
vm_start();
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
void qmp_dump_guest_memory(bool paging, const char *file, bool has_begin,
|
|
int64_t begin, bool has_length, int64_t length,
|
|
Error **errp)
|
|
{
|
|
const char *p;
|
|
int fd = -1;
|
|
DumpState *s;
|
|
int ret;
|
|
|
|
if (has_begin && !has_length) {
|
|
error_set(errp, QERR_MISSING_PARAMETER, "length");
|
|
return;
|
|
}
|
|
if (!has_begin && has_length) {
|
|
error_set(errp, QERR_MISSING_PARAMETER, "begin");
|
|
return;
|
|
}
|
|
|
|
#if !defined(WIN32)
|
|
if (strstart(file, "fd:", &p)) {
|
|
fd = monitor_get_fd(cur_mon, p, errp);
|
|
if (fd == -1) {
|
|
return;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (strstart(file, "file:", &p)) {
|
|
fd = qemu_open(p, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, S_IRUSR);
|
|
if (fd < 0) {
|
|
error_set(errp, QERR_OPEN_FILE_FAILED, p);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (fd == -1) {
|
|
error_set(errp, QERR_INVALID_PARAMETER, "protocol");
|
|
return;
|
|
}
|
|
|
|
s = g_malloc(sizeof(DumpState));
|
|
|
|
ret = dump_init(s, fd, paging, has_begin, begin, length, errp);
|
|
if (ret < 0) {
|
|
g_free(s);
|
|
return;
|
|
}
|
|
|
|
if (create_vmcore(s) < 0 && !error_is_set(s->errp)) {
|
|
error_set(errp, QERR_IO_ERROR);
|
|
}
|
|
|
|
g_free(s);
|
|
}
|