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authorViktor Prutyanov <viktor.prutyanov@virtuozzo.com>2018-05-17 19:23:39 +0300
committerPaolo Bonzini <pbonzini@redhat.com>2018-06-29 13:02:48 +0200
commit2da91b54fe98faa8676264ac6e5a3aac5b69bec2 (patch)
treeb7f41442a04fc203e06dc155eca97f7da55049db /hmp.c
parent2266d44311321a833d569cd4deb46cca6021d0e7 (diff)
dump: add Windows dump format to dump-guest-memory
This patch adds Windows crashdumping feature. Now QEMU can produce ELF-dump containing Windows crashdump header, which can help to convert to a valid WinDbg-understandable crashdump file, or immediately create such file. The crashdump will be obtained by joining physical memory dump and 8K header exposed through vmcoreinfo/fw_cfg device by guest driver at BSOD time. Option '-w' was added to dump-guest-memory command. At the moment, only x64 configuration is supported. Suitable driver can be found at https://github.com/virtio-win/kvm-guest-drivers-windows/tree/master/fwcfg64 Signed-off-by: Viktor Prutyanov <viktor.prutyanov@virtuozzo.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20180517162342.4330-2-viktor.prutyanov@virtuozzo.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hmp.c')
-rw-r--r--hmp.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/hmp.c b/hmp.c
index 0da0b0ac33..41f5e39b72 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;
}