From 2da91b54fe98faa8676264ac6e5a3aac5b69bec2 Mon Sep 17 00:00:00 2001 From: Viktor Prutyanov Date: Thu, 17 May 2018 19:23:39 +0300 Subject: dump: add Windows dump format to dump-guest-memory MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Reviewed-by: Marc-André Lureau Message-Id: <20180517162342.4330-2-viktor.prutyanov@virtuozzo.com> Signed-off-by: Paolo Bonzini --- dump.c | 24 +++++++++++++++++++++++- 1 file changed, 23 insertions(+), 1 deletion(-) (limited to 'dump.c') diff --git a/dump.c b/dump.c index b54cd42b21..04467b353e 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 #ifdef CONFIG_LZO #include @@ -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; } -- cgit 1.4.1