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>

1 files changed, 87 insertions, 0 deletions

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