dump/win_dump: add 32-bit guest Windows support
Before this patch, 'dump-guest-memory -w' was accepting only 64-bit dump header provided by guest through vmcoreinfo and thus was unable to produce 32-bit guest Windows dump. So, add 32-bit guest Windows dumping support. Signed-off-by: Viktor Prutyanov <viktor.prutyanov@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> [ misc error handling fixes to avoid compiler warning ] Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20220406171558.199263-5-viktor.prutyanov@redhat.com>
This commit is contained in:
parent
c4fe30921f
commit
f5daa8293b
175
dump/win_dump.c
175
dump/win_dump.c
@ -23,18 +23,24 @@
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#include "hw/misc/vmcoreinfo.h"
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#include "win_dump.h"
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#define WIN_DUMP_PTR_SIZE sizeof(uint64_t)
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static size_t win_dump_ptr_size(bool x64)
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{
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return x64 ? sizeof(uint64_t) : sizeof(uint32_t);
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}
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#define _WIN_DUMP_FIELD(f) (h->f)
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#define _WIN_DUMP_FIELD(f) (x64 ? h->x64.f : h->x32.f)
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#define WIN_DUMP_FIELD(field) _WIN_DUMP_FIELD(field)
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#define _WIN_DUMP_FIELD_PTR(f) ((void *)&h->f)
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#define _WIN_DUMP_FIELD_PTR(f) (x64 ? (void *)&h->x64.f : (void *)&h->x32.f)
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#define WIN_DUMP_FIELD_PTR(field) _WIN_DUMP_FIELD_PTR(field)
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#define _WIN_DUMP_FIELD_SIZE(f) sizeof(h->f)
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#define _WIN_DUMP_FIELD_SIZE(f) (x64 ? sizeof(h->x64.f) : sizeof(h->x32.f))
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#define WIN_DUMP_FIELD_SIZE(field) _WIN_DUMP_FIELD_SIZE(field)
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#define WIN_DUMP_CTX_SIZE sizeof(WinContext64)
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static size_t win_dump_ctx_size(bool x64)
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{
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return x64 ? sizeof(WinContext64) : sizeof(WinContext32);
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}
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static size_t write_run(uint64_t base_page, uint64_t page_count,
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int fd, Error **errp)
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@ -70,7 +76,7 @@ static size_t write_run(uint64_t base_page, uint64_t page_count,
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return total;
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}
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static void write_runs(DumpState *s, WinDumpHeader64 *h, Error **errp)
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static void write_runs(DumpState *s, WinDumpHeader *h, bool x64, Error **errp)
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{
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uint64_t BasePage, PageCount;
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Error *local_err = NULL;
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@ -87,22 +93,24 @@ static void write_runs(DumpState *s, WinDumpHeader64 *h, Error **errp)
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}
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}
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static int cpu_read_ptr(CPUState *cpu, uint64_t addr, uint64_t *ptr)
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static int cpu_read_ptr(bool x64, CPUState *cpu, uint64_t addr, uint64_t *ptr)
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{
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int ret;
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uint32_t ptr32;
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uint64_t ptr64;
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ret = cpu_memory_rw_debug(cpu, addr, &ptr64, WIN_DUMP_PTR_SIZE, 0);
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ret = cpu_memory_rw_debug(cpu, addr, x64 ? (void *)&ptr64 : (void *)&ptr32,
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win_dump_ptr_size(x64), 0);
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*ptr = ptr64;
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*ptr = x64 ? ptr64 : ptr32;
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return ret;
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}
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static void patch_mm_pfn_database(WinDumpHeader64 *h, Error **errp)
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static void patch_mm_pfn_database(WinDumpHeader *h, bool x64, Error **errp)
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{
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if (cpu_memory_rw_debug(first_cpu,
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WIN_DUMP_FIELD(KdDebuggerDataBlock) + KDBG_MM_PFN_DATABASE_OFFSET64,
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WIN_DUMP_FIELD(KdDebuggerDataBlock) + KDBG_MM_PFN_DATABASE_OFFSET,
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WIN_DUMP_FIELD_PTR(PfnDatabase),
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WIN_DUMP_FIELD_SIZE(PfnDatabase), 0)) {
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error_setg(errp, "win-dump: failed to read MmPfnDatabase");
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@ -110,13 +118,12 @@ static void patch_mm_pfn_database(WinDumpHeader64 *h, Error **errp)
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}
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}
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static void patch_bugcheck_data(WinDumpHeader64 *h, Error **errp)
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static void patch_bugcheck_data(WinDumpHeader *h, bool x64, Error **errp)
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{
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uint64_t KiBugcheckData;
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if (cpu_read_ptr(first_cpu,
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WIN_DUMP_FIELD(KdDebuggerDataBlock) +
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KDBG_KI_BUGCHECK_DATA_OFFSET64,
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if (cpu_read_ptr(x64, first_cpu,
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WIN_DUMP_FIELD(KdDebuggerDataBlock) + KDBG_KI_BUGCHECK_DATA_OFFSET,
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&KiBugcheckData)) {
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error_setg(errp, "win-dump: failed to read KiBugcheckData");
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return;
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@ -141,45 +148,55 @@ static void patch_bugcheck_data(WinDumpHeader64 *h, Error **errp)
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/*
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* This routine tries to correct mistakes in crashdump header.
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*/
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static void patch_header(WinDumpHeader64 *h)
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static void patch_header(WinDumpHeader *h, bool x64)
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{
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Error *local_err = NULL;
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h->RequiredDumpSpace = sizeof(WinDumpHeader64) +
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(h->PhysicalMemoryBlock.NumberOfPages << TARGET_PAGE_BITS);
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h->PhysicalMemoryBlock.unused = 0;
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h->unused1 = 0;
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if (x64) {
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h->x64.RequiredDumpSpace = sizeof(WinDumpHeader64) +
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(h->x64.PhysicalMemoryBlock.NumberOfPages << TARGET_PAGE_BITS);
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h->x64.PhysicalMemoryBlock.unused = 0;
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h->x64.unused1 = 0;
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} else {
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h->x32.RequiredDumpSpace = sizeof(WinDumpHeader32) +
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(h->x32.PhysicalMemoryBlock.NumberOfPages << TARGET_PAGE_BITS);
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}
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patch_mm_pfn_database(h, &local_err);
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patch_mm_pfn_database(h, x64, &local_err);
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if (local_err) {
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warn_report_err(local_err);
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local_err = NULL;
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}
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patch_bugcheck_data(h, &local_err);
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patch_bugcheck_data(h, x64, &local_err);
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if (local_err) {
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warn_report_err(local_err);
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}
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}
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static void check_header(WinDumpHeader64 *h, Error **errp)
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static bool check_header(WinDumpHeader *h, bool *x64, Error **errp)
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{
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const char Signature[] = "PAGE";
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const char ValidDump[] = "DU64";
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if (memcmp(h->Signature, Signature, sizeof(h->Signature))) {
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error_setg(errp, "win-dump: invalid header, expected '%.4s',"
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" got '%.4s'", Signature, h->Signature);
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return;
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return false;
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}
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if (memcmp(h->ValidDump, ValidDump, sizeof(h->ValidDump))) {
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error_setg(errp, "win-dump: invalid header, expected '%.4s',"
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" got '%.4s'", ValidDump, h->ValidDump);
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return;
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}
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if (!memcmp(h->ValidDump, "DUMP", sizeof(h->ValidDump))) {
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*x64 = false;
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} else if (!memcmp(h->ValidDump, "DU64", sizeof(h->ValidDump))) {
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*x64 = true;
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} else {
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error_setg(errp, "win-dump: invalid header, expected 'DUMP' or 'DU64',"
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" got '%.4s'", h->ValidDump);
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return false;
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}
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static void check_kdbg(WinDumpHeader64 *h, Error **errp)
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return true;
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}
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static void check_kdbg(WinDumpHeader *h, bool x64, Error **errp)
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{
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const char OwnerTag[] = "KDBG";
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char read_OwnerTag[4];
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@ -188,7 +205,7 @@ static void check_kdbg(WinDumpHeader64 *h, Error **errp)
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try_again:
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if (cpu_memory_rw_debug(first_cpu,
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KdDebuggerDataBlock + KDBG_OWNER_TAG_OFFSET64,
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KdDebuggerDataBlock + KDBG_OWNER_TAG_OFFSET,
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(uint8_t *)&read_OwnerTag, sizeof(read_OwnerTag), 0)) {
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error_setg(errp, "win-dump: failed to read OwnerTag");
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return;
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@ -213,15 +230,19 @@ try_again:
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}
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}
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h->KdDebuggerDataBlock = KdDebuggerDataBlock;
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if (x64) {
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h->x64.KdDebuggerDataBlock = KdDebuggerDataBlock;
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} else {
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h->x32.KdDebuggerDataBlock = KdDebuggerDataBlock;
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}
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}
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struct saved_context {
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WinContext64 ctx;
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WinContext ctx;
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uint64_t addr;
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};
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static void patch_and_save_context(WinDumpHeader64 *h,
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static void patch_and_save_context(WinDumpHeader *h, bool x64,
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struct saved_context *saved_ctx,
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Error **errp)
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{
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@ -231,15 +252,15 @@ static void patch_and_save_context(WinDumpHeader64 *h,
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CPUState *cpu;
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int i = 0;
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if (cpu_read_ptr(first_cpu,
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KdDebuggerDataBlock + KDBG_KI_PROCESSOR_BLOCK_OFFSET64,
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if (cpu_read_ptr(x64, first_cpu,
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KdDebuggerDataBlock + KDBG_KI_PROCESSOR_BLOCK_OFFSET,
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&KiProcessorBlock)) {
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error_setg(errp, "win-dump: failed to read KiProcessorBlock");
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return;
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}
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if (cpu_memory_rw_debug(first_cpu,
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KdDebuggerDataBlock + KDBG_OFFSET_PRCB_CONTEXT_OFFSET64,
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KdDebuggerDataBlock + KDBG_OFFSET_PRCB_CONTEXT_OFFSET,
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(uint8_t *)&OffsetPrcbContext, sizeof(OffsetPrcbContext), 0)) {
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error_setg(errp, "win-dump: failed to read OffsetPrcbContext");
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return;
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@ -250,17 +271,17 @@ static void patch_and_save_context(WinDumpHeader64 *h,
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CPUX86State *env = &x86_cpu->env;
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uint64_t Prcb;
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uint64_t Context;
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WinContext64 ctx;
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WinContext ctx;
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if (cpu_read_ptr(first_cpu,
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KiProcessorBlock + i * WIN_DUMP_PTR_SIZE,
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if (cpu_read_ptr(x64, first_cpu,
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KiProcessorBlock + i * win_dump_ptr_size(x64),
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&Prcb)) {
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error_setg(errp, "win-dump: failed to read"
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" CPU #%d PRCB location", i);
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return;
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}
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if (cpu_read_ptr(first_cpu,
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if (cpu_read_ptr(x64, first_cpu,
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Prcb + OffsetPrcbContext,
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&Context)) {
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error_setg(errp, "win-dump: failed to read"
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@ -270,7 +291,8 @@ static void patch_and_save_context(WinDumpHeader64 *h,
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saved_ctx[i].addr = Context;
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ctx = (WinContext64){
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if (x64) {
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ctx.x64 = (WinContext64){
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.ContextFlags = WIN_CTX64_ALL,
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.MxCsr = env->mxcsr,
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@ -311,15 +333,46 @@ static void patch_and_save_context(WinDumpHeader64 *h,
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.MxCsr = env->mxcsr,
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},
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};
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} else {
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ctx.x32 = (WinContext32){
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.ContextFlags = WIN_CTX32_FULL | WIN_CTX_DBG,
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.SegEs = env->segs[0].selector,
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.SegCs = env->segs[1].selector,
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.SegSs = env->segs[2].selector,
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.SegDs = env->segs[3].selector,
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.SegFs = env->segs[4].selector,
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.SegGs = env->segs[5].selector,
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.EFlags = cpu_compute_eflags(env),
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.Dr0 = env->dr[0],
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.Dr1 = env->dr[1],
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.Dr2 = env->dr[2],
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.Dr3 = env->dr[3],
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.Dr6 = env->dr[6],
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.Dr7 = env->dr[7],
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.Eax = env->regs[R_EAX],
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.Ebx = env->regs[R_EBX],
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.Ecx = env->regs[R_ECX],
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.Edx = env->regs[R_EDX],
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.Esp = env->regs[R_ESP],
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.Ebp = env->regs[R_EBP],
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.Esi = env->regs[R_ESI],
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.Edi = env->regs[R_EDI],
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.Eip = env->eip,
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};
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}
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if (cpu_memory_rw_debug(first_cpu, Context,
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&saved_ctx[i].ctx, WIN_DUMP_CTX_SIZE, 0)) {
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&saved_ctx[i].ctx, win_dump_ctx_size(x64), 0)) {
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error_setg(errp, "win-dump: failed to save CPU #%d context", i);
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return;
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}
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if (cpu_memory_rw_debug(first_cpu, Context,
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&ctx, WIN_DUMP_CTX_SIZE, 1)) {
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&ctx, win_dump_ctx_size(x64), 1)) {
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error_setg(errp, "win-dump: failed to write CPU #%d context", i);
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return;
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}
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@ -328,14 +381,14 @@ static void patch_and_save_context(WinDumpHeader64 *h,
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}
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}
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static void restore_context(WinDumpHeader64 *h,
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static void restore_context(WinDumpHeader *h, bool x64,
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struct saved_context *saved_ctx)
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{
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int i;
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for (i = 0; i < WIN_DUMP_FIELD(NumberProcessors); i++) {
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if (cpu_memory_rw_debug(first_cpu, saved_ctx[i].addr,
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&saved_ctx[i].ctx, WIN_DUMP_CTX_SIZE, 1)) {
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&saved_ctx[i].ctx, win_dump_ctx_size(x64), 1)) {
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warn_report("win-dump: failed to restore CPU #%d context", i);
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}
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}
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@ -343,25 +396,27 @@ static void restore_context(WinDumpHeader64 *h,
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void create_win_dump(DumpState *s, Error **errp)
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{
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WinDumpHeader64 *h = (WinDumpHeader64 *)(s->guest_note +
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VMCOREINFO_ELF_NOTE_HDR_SIZE);
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WinDumpHeader *h = (void *)(s->guest_note + VMCOREINFO_ELF_NOTE_HDR_SIZE);
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X86CPU *first_x86_cpu = X86_CPU(first_cpu);
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uint64_t saved_cr3 = first_x86_cpu->env.cr[3];
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struct saved_context *saved_ctx = NULL;
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Error *local_err = NULL;
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bool x64 = true;
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size_t hdr_size;
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if (s->guest_note_size != sizeof(WinDumpHeader64) +
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VMCOREINFO_ELF_NOTE_HDR_SIZE) {
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if (s->guest_note_size != VMCOREINFO_WIN_DUMP_NOTE_SIZE32 &&
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s->guest_note_size != VMCOREINFO_WIN_DUMP_NOTE_SIZE64) {
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error_setg(errp, "win-dump: invalid vmcoreinfo note size");
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return;
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}
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check_header(h, &local_err);
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if (local_err) {
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if (!check_header(h, &x64, &local_err)) {
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error_propagate(errp, local_err);
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return;
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}
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hdr_size = x64 ? sizeof(WinDumpHeader64) : sizeof(WinDumpHeader32);
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/*
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* Further access to kernel structures by virtual addresses
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* should be made from system context.
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@ -369,13 +424,13 @@ void create_win_dump(DumpState *s, Error **errp)
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first_x86_cpu->env.cr[3] = WIN_DUMP_FIELD(DirectoryTableBase);
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check_kdbg(h, &local_err);
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check_kdbg(h, x64, &local_err);
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if (local_err) {
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error_propagate(errp, local_err);
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goto out_cr3;
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}
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patch_header(h);
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patch_header(h, x64);
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saved_ctx = g_new(struct saved_context, WIN_DUMP_FIELD(NumberProcessors));
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@ -384,7 +439,7 @@ void create_win_dump(DumpState *s, Error **errp)
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* to determine if the system-saved context is valid
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*/
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patch_and_save_context(h, saved_ctx, &local_err);
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patch_and_save_context(h, x64, saved_ctx, &local_err);
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if (local_err) {
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error_propagate(errp, local_err);
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goto out_free;
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@ -392,20 +447,20 @@ void create_win_dump(DumpState *s, Error **errp)
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s->total_size = WIN_DUMP_FIELD(RequiredDumpSpace);
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s->written_size = qemu_write_full(s->fd, h, sizeof(*h));
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if (s->written_size != sizeof(*h)) {
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s->written_size = qemu_write_full(s->fd, h, hdr_size);
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if (s->written_size != hdr_size) {
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error_setg(errp, QERR_IO_ERROR);
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goto out_restore;
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}
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write_runs(s, h, &local_err);
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write_runs(s, h, x64, &local_err);
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if (local_err) {
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error_propagate(errp, local_err);
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goto out_restore;
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}
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out_restore:
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restore_context(h, saved_ctx);
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restore_context(h, x64, saved_ctx);
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out_free:
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g_free(saved_ctx);
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out_cr3:
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@ -1064,7 +1064,7 @@ ERST
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"-l: dump in kdump-compressed format, with lzo compression.\n\t\t\t"
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"-s: dump in kdump-compressed format, with snappy compression.\n\t\t\t"
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"-w: dump in Windows crashdump format (can be used instead of ELF-dump converting),\n\t\t\t"
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" for Windows x64 guests with vmcoreinfo driver only.\n\t\t\t"
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" for Windows x86 and x64 guests with vmcoreinfo driver only.\n\t\t\t"
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"begin: the starting physical address.\n\t\t\t"
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"length: the memory size, in bytes.",
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.cmd = hmp_dump_guest_memory,
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