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-rw-r--r--Makefile.target1
-rw-r--r--dump.c24
-rw-r--r--hmp-commands.hx13
-rw-r--r--hmp.c9
-rw-r--r--qapi/misc.json5
-rw-r--r--win_dump.c209
-rw-r--r--win_dump.h87
7 files changed, 339 insertions, 9 deletions
diff --git a/Makefile.target b/Makefile.target
index a9d8928..4d56298 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -143,6 +143,7 @@ obj-y += hw/
obj-y += memory.o
obj-y += memory_mapping.o
obj-y += dump.o
+obj-$(TARGET_X86_64) += win_dump.o
obj-y += migration/ram.o
LIBS := $(libs_softmmu) $(LIBS)
diff --git a/dump.c b/dump.c
index b54cd42..04467b3 100644
--- a/dump.c
+++ b/dump.c
@@ -29,6 +29,10 @@
#include "qemu/error-report.h"
#include "hw/misc/vmcoreinfo.h"
+#ifdef TARGET_X86_64
+#include "win_dump.h"
+#endif
+
#include <zlib.h>
#ifdef CONFIG_LZO
#include <lzo/lzo1x.h>
@@ -1866,7 +1870,11 @@ static void dump_process(DumpState *s, Error **errp)
Error *local_err = NULL;
DumpQueryResult *result = NULL;
- if (s->has_format && s->format != DUMP_GUEST_MEMORY_FORMAT_ELF) {
+ if (s->has_format && s->format == DUMP_GUEST_MEMORY_FORMAT_WIN_DMP) {
+#ifdef TARGET_X86_64
+ create_win_dump(s, &local_err);
+#endif
+ } else if (s->has_format && s->format != DUMP_GUEST_MEMORY_FORMAT_ELF) {
create_kdump_vmcore(s, &local_err);
} else {
create_vmcore(s, &local_err);
@@ -1970,6 +1978,13 @@ void qmp_dump_guest_memory(bool paging, const char *file,
}
#endif
+#ifndef TARGET_X86_64
+ if (has_format && format == DUMP_GUEST_MEMORY_FORMAT_WIN_DMP) {
+ error_setg(errp, "Windows dump is only available for x86-64");
+ return;
+ }
+#endif
+
#if !defined(WIN32)
if (strstart(file, "fd:", &p)) {
fd = monitor_get_fd(cur_mon, p, errp);
@@ -2044,5 +2059,12 @@ DumpGuestMemoryCapability *qmp_query_dump_guest_memory_capability(Error **errp)
item->value = DUMP_GUEST_MEMORY_FORMAT_KDUMP_SNAPPY;
#endif
+ /* Windows dump is available only if target is x86_64 */
+#ifdef TARGET_X86_64
+ item->next = g_malloc0(sizeof(DumpGuestMemoryFormatList));
+ item = item->next;
+ item->value = DUMP_GUEST_MEMORY_FORMAT_WIN_DMP;
+#endif
+
return cap;
}
diff --git a/hmp-commands.hx b/hmp-commands.hx
index ba9cdb8..c1fc747 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -1136,30 +1136,33 @@ ETEXI
{
.name = "dump-guest-memory",
- .args_type = "paging:-p,detach:-d,zlib:-z,lzo:-l,snappy:-s,filename:F,begin:l?,length:l?",
- .params = "[-p] [-d] [-z|-l|-s] filename [begin length]",
+ .args_type = "paging:-p,detach:-d,windmp:-w,zlib:-z,lzo:-l,snappy:-s,filename:F,begin:l?,length:l?",
+ .params = "[-p] [-d] [-z|-l|-s|-w] filename [begin length]",
.help = "dump guest memory into file 'filename'.\n\t\t\t"
"-p: do paging to get guest's memory mapping.\n\t\t\t"
"-d: return immediately (do not wait for completion).\n\t\t\t"
"-z: dump in kdump-compressed format, with zlib compression.\n\t\t\t"
"-l: dump in kdump-compressed format, with lzo compression.\n\t\t\t"
"-s: dump in kdump-compressed format, with snappy compression.\n\t\t\t"
+ "-w: dump in Windows crashdump format (can be used instead of ELF-dump converting),\n\t\t\t"
+ " for Windows x64 guests with vmcoreinfo driver only.\n\t\t\t"
"begin: the starting physical address.\n\t\t\t"
"length: the memory size, in bytes.",
.cmd = hmp_dump_guest_memory,
},
-
STEXI
@item dump-guest-memory [-p] @var{filename} @var{begin} @var{length}
-@item dump-guest-memory [-z|-l|-s] @var{filename}
+@item dump-guest-memory [-z|-l|-s|-w] @var{filename}
@findex dump-guest-memory
Dump guest memory to @var{protocol}. The file can be processed with crash or
-gdb. Without -z|-l|-s, the dump format is ELF.
+gdb. Without -z|-l|-s|-w, the dump format is ELF.
-p: do paging to get guest's memory mapping.
-z: dump in kdump-compressed format, with zlib compression.
-l: dump in kdump-compressed format, with lzo compression.
-s: dump in kdump-compressed format, with snappy compression.
+ -w: dump in Windows crashdump format (can be used instead of ELF-dump converting),
+ for Windows x64 guests with vmcoreinfo driver only
filename: dump file name.
begin: the starting physical address. It's optional, and should be
specified together with length.
diff --git a/hmp.c b/hmp.c
index 0da0b0a..41f5e39 100644
--- a/hmp.c
+++ b/hmp.c
@@ -2014,6 +2014,7 @@ void hmp_device_del(Monitor *mon, const QDict *qdict)
void hmp_dump_guest_memory(Monitor *mon, const QDict *qdict)
{
Error *err = NULL;
+ bool win_dmp = qdict_get_try_bool(qdict, "windmp", false);
bool paging = qdict_get_try_bool(qdict, "paging", false);
bool zlib = qdict_get_try_bool(qdict, "zlib", false);
bool lzo = qdict_get_try_bool(qdict, "lzo", false);
@@ -2028,12 +2029,16 @@ void hmp_dump_guest_memory(Monitor *mon, const QDict *qdict)
enum DumpGuestMemoryFormat dump_format = DUMP_GUEST_MEMORY_FORMAT_ELF;
char *prot;
- if (zlib + lzo + snappy > 1) {
- error_setg(&err, "only one of '-z|-l|-s' can be set");
+ if (zlib + lzo + snappy + win_dmp > 1) {
+ error_setg(&err, "only one of '-z|-l|-s|-w' can be set");
hmp_handle_error(mon, &err);
return;
}
+ if (win_dmp) {
+ dump_format = DUMP_GUEST_MEMORY_FORMAT_WIN_DMP;
+ }
+
if (zlib) {
dump_format = DUMP_GUEST_MEMORY_FORMAT_KDUMP_ZLIB;
}
diff --git a/qapi/misc.json b/qapi/misc.json
index c6bc18a..29da785 100644
--- a/qapi/misc.json
+++ b/qapi/misc.json
@@ -1677,10 +1677,13 @@
#
# @kdump-snappy: kdump-compressed format with snappy-compressed
#
+# @win-dmp: Windows full crashdump format,
+# can be used instead of ELF converting (since 2.13)
+#
# Since: 2.0
##
{ 'enum': 'DumpGuestMemoryFormat',
- 'data': [ 'elf', 'kdump-zlib', 'kdump-lzo', 'kdump-snappy' ] }
+ 'data': [ 'elf', 'kdump-zlib', 'kdump-lzo', 'kdump-snappy', 'win-dmp' ] }
##
# @dump-guest-memory:
diff --git a/win_dump.c b/win_dump.c
new file mode 100644
index 0000000..58255c1
--- /dev/null
+++ b/win_dump.c
@@ -0,0 +1,209 @@
+/*
+ * Windows crashdump
+ *
+ * Copyright (c) 2018 Virtuozzo International GmbH
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/cutils.h"
+#include "elf.h"
+#include "cpu.h"
+#include "exec/hwaddr.h"
+#include "monitor/monitor.h"
+#include "sysemu/kvm.h"
+#include "sysemu/dump.h"
+#include "sysemu/sysemu.h"
+#include "sysemu/memory_mapping.h"
+#include "sysemu/cpus.h"
+#include "qapi/error.h"
+#include "qapi/qmp/qerror.h"
+#include "qemu/error-report.h"
+#include "hw/misc/vmcoreinfo.h"
+#include "win_dump.h"
+
+static size_t write_run(WinDumpPhyMemRun64 *run, int fd, Error **errp)
+{
+ void *buf;
+ uint64_t addr = run->BasePage << TARGET_PAGE_BITS;
+ uint64_t size = run->PageCount << TARGET_PAGE_BITS;
+ uint64_t len = size;
+
+ buf = cpu_physical_memory_map(addr, &len, false);
+ if (!buf) {
+ error_setg(errp, "win-dump: failed to map run");
+ return 0;
+ }
+ if (len != size) {
+ error_setg(errp, "win-dump: failed to map entire run");
+ len = 0;
+ goto out_unmap;
+ }
+
+ len = qemu_write_full(fd, buf, len);
+ if (len != size) {
+ error_setg(errp, QERR_IO_ERROR);
+ }
+
+out_unmap:
+ cpu_physical_memory_unmap(buf, addr, false, len);
+
+ return len;
+}
+
+static void write_runs(DumpState *s, WinDumpHeader64 *h, Error **errp)
+{
+ WinDumpPhyMemDesc64 *desc = &h->PhysicalMemoryBlock;
+ WinDumpPhyMemRun64 *run = desc->Run;
+ Error *local_err = NULL;
+ int i;
+
+ for (i = 0; i < desc->NumberOfRuns; i++) {
+ s->written_size += write_run(run + i, s->fd, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
+ }
+ }
+}
+
+static void patch_mm_pfn_database(WinDumpHeader64 *h, Error **errp)
+{
+ if (cpu_memory_rw_debug(first_cpu,
+ h->KdDebuggerDataBlock + KDBG_MM_PFN_DATABASE_OFFSET64,
+ (uint8_t *)&h->PfnDatabase, sizeof(h->PfnDatabase), 0)) {
+ error_setg(errp, "win-dump: failed to read MmPfnDatabase");
+ return;
+ }
+}
+
+static void patch_bugcheck_data(WinDumpHeader64 *h, Error **errp)
+{
+ uint64_t KiBugcheckData;
+
+ if (cpu_memory_rw_debug(first_cpu,
+ h->KdDebuggerDataBlock + KDBG_KI_BUGCHECK_DATA_OFFSET64,
+ (uint8_t *)&KiBugcheckData, sizeof(KiBugcheckData), 0)) {
+ error_setg(errp, "win-dump: failed to read KiBugcheckData");
+ return;
+ }
+
+ if (cpu_memory_rw_debug(first_cpu,
+ KiBugcheckData,
+ h->BugcheckData, sizeof(h->BugcheckData), 0)) {
+ error_setg(errp, "win-dump: failed to read bugcheck data");
+ return;
+ }
+}
+
+/*
+ * This routine tries to correct mistakes in crashdump header.
+ */
+static void patch_header(WinDumpHeader64 *h)
+{
+ Error *local_err = NULL;
+
+ h->RequiredDumpSpace = sizeof(WinDumpHeader64) +
+ (h->PhysicalMemoryBlock.NumberOfPages << TARGET_PAGE_BITS);
+ h->PhysicalMemoryBlock.unused = 0;
+ h->unused1 = 0;
+
+ /*
+ * We assume h->DirectoryBase and current CR3 are the same when we access
+ * memory by virtual address. In other words, we suppose current context
+ * is system context. It is definetely true in case of BSOD.
+ */
+
+ patch_mm_pfn_database(h, &local_err);
+ if (local_err) {
+ warn_report_err(local_err);
+ local_err = NULL;
+ }
+ patch_bugcheck_data(h, &local_err);
+ if (local_err) {
+ warn_report_err(local_err);
+ }
+}
+
+static void check_header(WinDumpHeader64 *h, Error **errp)
+{
+ const char Signature[] = "PAGE";
+ const char ValidDump[] = "DU64";
+
+ if (memcmp(h->Signature, Signature, sizeof(h->Signature))) {
+ error_setg(errp, "win-dump: invalid header, expected '%.4s',"
+ " got '%.4s'", Signature, h->Signature);
+ return;
+ }
+
+ if (memcmp(h->ValidDump, ValidDump, sizeof(h->ValidDump))) {
+ error_setg(errp, "win-dump: invalid header, expected '%.4s',"
+ " got '%.4s'", ValidDump, h->ValidDump);
+ return;
+ }
+}
+
+static void check_kdbg(WinDumpHeader64 *h, Error **errp)
+{
+ const char OwnerTag[] = "KDBG";
+ char read_OwnerTag[4];
+
+ if (cpu_memory_rw_debug(first_cpu,
+ h->KdDebuggerDataBlock + KDBG_OWNER_TAG_OFFSET64,
+ (uint8_t *)&read_OwnerTag, sizeof(read_OwnerTag), 0)) {
+ error_setg(errp, "win-dump: failed to read OwnerTag");
+ return;
+ }
+
+ if (memcmp(read_OwnerTag, OwnerTag, sizeof(read_OwnerTag))) {
+ error_setg(errp, "win-dump: invalid KDBG OwnerTag,"
+ " expected '%.4s', got '%.4s',"
+ " KdDebuggerDataBlock seems to be encrypted",
+ OwnerTag, read_OwnerTag);
+ return;
+ }
+}
+
+void create_win_dump(DumpState *s, Error **errp)
+{
+ WinDumpHeader64 *h = (WinDumpHeader64 *)(s->guest_note +
+ VMCOREINFO_ELF_NOTE_HDR_SIZE);
+ Error *local_err = NULL;
+
+ if (s->guest_note_size != sizeof(WinDumpHeader64) +
+ VMCOREINFO_ELF_NOTE_HDR_SIZE) {
+ error_setg(errp, "win-dump: invalid vmcoreinfo note size");
+ return;
+ }
+
+ check_header(h, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
+ }
+
+ check_kdbg(h, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
+ }
+
+ patch_header(h);
+
+ s->total_size = h->RequiredDumpSpace;
+
+ s->written_size = qemu_write_full(s->fd, h, sizeof(*h));
+ if (s->written_size != sizeof(*h)) {
+ error_setg(errp, QERR_IO_ERROR);
+ return;
+ }
+
+ write_runs(s, h, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
+ }
+}
diff --git a/win_dump.h b/win_dump.h
new file mode 100644
index 0000000..2812418
--- /dev/null
+++ b/win_dump.h
@@ -0,0 +1,87 @@
+/*
+ * Windows crashdump
+ *
+ * Copyright (c) 2018 Virtuozzo International GmbH
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+typedef struct WinDumpPhyMemRun64 {
+ uint64_t BasePage;
+ uint64_t PageCount;
+} QEMU_PACKED WinDumpPhyMemRun64;
+
+typedef struct WinDumpPhyMemDesc64 {
+ uint32_t NumberOfRuns;
+ uint32_t unused;
+ uint64_t NumberOfPages;
+ WinDumpPhyMemRun64 Run[43];
+} QEMU_PACKED WinDumpPhyMemDesc64;
+
+typedef struct WinDumpExceptionRecord {
+ uint32_t ExceptionCode;
+ uint32_t ExceptionFlags;
+ uint64_t ExceptionRecord;
+ uint64_t ExceptionAddress;
+ uint32_t NumberParameters;
+ uint32_t unused;
+ uint64_t ExceptionInformation[15];
+} QEMU_PACKED WinDumpExceptionRecord;
+
+typedef struct WinDumpHeader64 {
+ char Signature[4];
+ char ValidDump[4];
+ uint32_t MajorVersion;
+ uint32_t MinorVersion;
+ uint64_t DirectoryTableBase;
+ uint64_t PfnDatabase;
+ uint64_t PsLoadedModuleList;
+ uint64_t PsActiveProcessHead;
+ uint32_t MachineImageType;
+ uint32_t NumberProcessors;
+ union {
+ struct {
+ uint32_t BugcheckCode;
+ uint32_t unused0;
+ uint64_t BugcheckParameter1;
+ uint64_t BugcheckParameter2;
+ uint64_t BugcheckParameter3;
+ uint64_t BugcheckParameter4;
+ };
+ uint8_t BugcheckData[40];
+ };
+ uint8_t VersionUser[32];
+ uint64_t KdDebuggerDataBlock;
+ union {
+ WinDumpPhyMemDesc64 PhysicalMemoryBlock;
+ uint8_t PhysicalMemoryBlockBuffer[704];
+ };
+ union {
+ uint8_t ContextBuffer[3000];
+ };
+ WinDumpExceptionRecord Exception;
+ uint32_t DumpType;
+ uint32_t unused1;
+ uint64_t RequiredDumpSpace;
+ uint64_t SystemTime;
+ char Comment[128];
+ uint64_t SystemUpTime;
+ uint32_t MiniDumpFields;
+ uint32_t SecondaryDataState;
+ uint32_t ProductType;
+ uint32_t SuiteMask;
+ uint32_t WriterStatus;
+ uint8_t unused2;
+ uint8_t KdSecondaryVersion;
+ uint8_t reserved[4018];
+} QEMU_PACKED WinDumpHeader64;
+
+void create_win_dump(DumpState *s, Error **errp);
+
+#define KDBG_OWNER_TAG_OFFSET64 0x10
+#define KDBG_KI_BUGCHECK_DATA_OFFSET64 0x88
+#define KDBG_MM_PFN_DATABASE_OFFSET64 0xC0
+
+#define VMCOREINFO_ELF_NOTE_HDR_SIZE 24