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dump/win_dump: add helper macros for Windows dump header access
Perform read access to Windows dump header fields via helper macros. This is preparation for the next 32-bit guest Windows dump support. Signed-off-by: Viktor Prutyanov <viktor.prutyanov@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20220406171558.199263-3-viktor.prutyanov@redhat.com>
This commit is contained in:
Viktor Prutyanov
Marc-André Lureau
parent
a64b4e179a
commit
fb21efe99a
100
dump/win_dump.c
100
dump/win_dump.c
@ -23,11 +23,25 @@
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#include "hw/misc/vmcoreinfo.h"
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#include "win_dump.h"
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static size_t write_run(WinDumpPhyMemRun64 *run, int fd, Error **errp)
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#define WIN_DUMP_PTR_SIZE sizeof(uint64_t)
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#define _WIN_DUMP_FIELD(f) (h->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(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(field) _WIN_DUMP_FIELD_SIZE(field)
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#define WIN_DUMP_CTX_SIZE sizeof(WinContext64)
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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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{
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void *buf;
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uint64_t addr = run->BasePage << TARGET_PAGE_BITS;
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uint64_t size = run->PageCount << TARGET_PAGE_BITS;
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uint64_t addr = base_page << TARGET_PAGE_BITS;
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uint64_t size = page_count << TARGET_PAGE_BITS;
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uint64_t len, l;
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size_t total = 0;
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@ -58,13 +72,14 @@ static size_t write_run(WinDumpPhyMemRun64 *run, int fd, Error **errp)
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static void write_runs(DumpState *s, WinDumpHeader64 *h, Error **errp)
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{
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WinDumpPhyMemDesc64 *desc = &h->PhysicalMemoryBlock;
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WinDumpPhyMemRun64 *run = desc->Run;
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uint64_t BasePage, PageCount;
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Error *local_err = NULL;
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int i;
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for (i = 0; i < desc->NumberOfRuns; i++) {
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s->written_size += write_run(run + i, s->fd, &local_err);
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for (i = 0; i < WIN_DUMP_FIELD(PhysicalMemoryBlock.NumberOfRuns); i++) {
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BasePage = WIN_DUMP_FIELD(PhysicalMemoryBlock.Run[i].BasePage);
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PageCount = WIN_DUMP_FIELD(PhysicalMemoryBlock.Run[i].PageCount);
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s->written_size += write_run(BasePage, PageCount, s->fd, &local_err);
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if (local_err) {
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error_propagate(errp, local_err);
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return;
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@ -72,11 +87,24 @@ 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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{
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int ret;
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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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*ptr = ptr64;
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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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{
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if (cpu_memory_rw_debug(first_cpu,
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h->KdDebuggerDataBlock + KDBG_MM_PFN_DATABASE_OFFSET64,
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(uint8_t *)&h->PfnDatabase, sizeof(h->PfnDatabase), 0)) {
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WIN_DUMP_FIELD(KdDebuggerDataBlock) + KDBG_MM_PFN_DATABASE_OFFSET64,
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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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return;
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}
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@ -86,16 +114,17 @@ static void patch_bugcheck_data(WinDumpHeader64 *h, Error **errp)
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{
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uint64_t KiBugcheckData;
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if (cpu_memory_rw_debug(first_cpu,
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h->KdDebuggerDataBlock + KDBG_KI_BUGCHECK_DATA_OFFSET64,
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(uint8_t *)&KiBugcheckData, sizeof(KiBugcheckData), 0)) {
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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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&KiBugcheckData)) {
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error_setg(errp, "win-dump: failed to read KiBugcheckData");
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return;
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}
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if (cpu_memory_rw_debug(first_cpu,
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KiBugcheckData,
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h->BugcheckData, sizeof(h->BugcheckData), 0)) {
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if (cpu_memory_rw_debug(first_cpu, KiBugcheckData,
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WIN_DUMP_FIELD(BugcheckData),
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WIN_DUMP_FIELD_SIZE(BugcheckData), 0)) {
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error_setg(errp, "win-dump: failed to read bugcheck data");
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return;
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}
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@ -104,8 +133,8 @@ static void patch_bugcheck_data(WinDumpHeader64 *h, Error **errp)
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* If BugcheckCode wasn't saved, we consider guest OS as alive.
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*/
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if (!h->BugcheckCode) {
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h->BugcheckCode = LIVE_SYSTEM_DUMP;
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if (!WIN_DUMP_FIELD(BugcheckCode)) {
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*(uint32_t *)WIN_DUMP_FIELD_PTR(BugcheckCode) = LIVE_SYSTEM_DUMP;
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}
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}
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@ -154,7 +183,7 @@ static void check_kdbg(WinDumpHeader64 *h, 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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uint64_t KdDebuggerDataBlock = h->KdDebuggerDataBlock;
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uint64_t KdDebuggerDataBlock = WIN_DUMP_FIELD(KdDebuggerDataBlock);
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bool try_fallback = true;
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try_again:
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@ -173,7 +202,7 @@ try_again:
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* we try to use KDBG obtained by guest driver.
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*/
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KdDebuggerDataBlock = h->BugcheckParameter1;
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KdDebuggerDataBlock = WIN_DUMP_FIELD(BugcheckParameter1);
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try_fallback = false;
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goto try_again;
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} else {
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@ -196,20 +225,21 @@ static void patch_and_save_context(WinDumpHeader64 *h,
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struct saved_context *saved_ctx,
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Error **errp)
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{
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uint64_t KdDebuggerDataBlock = WIN_DUMP_FIELD(KdDebuggerDataBlock);
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uint64_t KiProcessorBlock;
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uint16_t OffsetPrcbContext;
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CPUState *cpu;
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int i = 0;
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if (cpu_memory_rw_debug(first_cpu,
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h->KdDebuggerDataBlock + KDBG_KI_PROCESSOR_BLOCK_OFFSET64,
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(uint8_t *)&KiProcessorBlock, sizeof(KiProcessorBlock), 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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&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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h->KdDebuggerDataBlock + KDBG_OFFSET_PRCB_CONTEXT_OFFSET64,
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KdDebuggerDataBlock + KDBG_OFFSET_PRCB_CONTEXT_OFFSET64,
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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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@ -222,17 +252,17 @@ static void patch_and_save_context(WinDumpHeader64 *h,
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uint64_t Context;
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WinContext64 ctx;
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if (cpu_memory_rw_debug(first_cpu,
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KiProcessorBlock + i * sizeof(uint64_t),
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(uint8_t *)&Prcb, sizeof(Prcb), 0)) {
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if (cpu_read_ptr(first_cpu,
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KiProcessorBlock + i * WIN_DUMP_PTR_SIZE,
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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_memory_rw_debug(first_cpu,
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if (cpu_read_ptr(first_cpu,
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Prcb + OffsetPrcbContext,
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(uint8_t *)&Context, sizeof(Context), 0)) {
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&Context)) {
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error_setg(errp, "win-dump: failed to read"
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" CPU #%d ContextFrame location", i);
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return;
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@ -283,13 +313,13 @@ static void patch_and_save_context(WinDumpHeader64 *h,
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};
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if (cpu_memory_rw_debug(first_cpu, Context,
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(uint8_t *)&saved_ctx[i].ctx, sizeof(WinContext64), 0)) {
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&saved_ctx[i].ctx, WIN_DUMP_CTX_SIZE, 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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(uint8_t *)&ctx, sizeof(WinContext64), 1)) {
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&ctx, WIN_DUMP_CTX_SIZE, 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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@ -303,9 +333,9 @@ static void restore_context(WinDumpHeader64 *h,
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{
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int i;
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for (i = 0; i < h->NumberProcessors; 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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(uint8_t *)&saved_ctx[i].ctx, sizeof(WinContext64), 1)) {
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&saved_ctx[i].ctx, WIN_DUMP_CTX_SIZE, 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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@ -337,7 +367,7 @@ void create_win_dump(DumpState *s, Error **errp)
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* should be made from system context.
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*/
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first_x86_cpu->env.cr[3] = h->DirectoryTableBase;
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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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if (local_err) {
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@ -347,7 +377,7 @@ void create_win_dump(DumpState *s, Error **errp)
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patch_header(h);
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saved_ctx = g_new(struct saved_context, h->NumberProcessors);
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saved_ctx = g_new(struct saved_context, WIN_DUMP_FIELD(NumberProcessors));
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/*
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* Always patch context because there is no way
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@ -360,7 +390,7 @@ void create_win_dump(DumpState *s, Error **errp)
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goto out_free;
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}
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s->total_size = h->RequiredDumpSpace;
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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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