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 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 --- win_dump.h | 87 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100644 win_dump.h (limited to 'win_dump.h') diff --git a/win_dump.h b/win_dump.h new file mode 100644 index 0000000000..281241881e --- /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 -- cgit v1.2.3-55-g7522