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[NTOS:KE/x64] Implement KiSave/RestoreXState

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This commit is contained in:
Timo Kreuzer
2025-06-21 07:55:06 +00:00
parent 410cf69b0c
commit d6874fe7b9
2 changed files with 53 additions and 0 deletions
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ntoskrnl/CMakeLists.txt
+5
View File
@@ -28,6 +28,11 @@ if(CMAKE_C_COMPILER_ID STREQUAL "Clang")
target_sources(libntoskrnl PRIVATE $<TARGET_OBJECTS:memcmp>)
endif()
if((CMAKE_C_COMPILER_ID STREQUAL "Clang") OR (CMAKE_C_COMPILER_ID STREQUAL "GNU"))
# Enable xsave feature
add_compile_options(-mxsave)
endif()
list(APPEND PCH_SKIP_SOURCE
guid.c)
ntoskrnl/include/internal/amd64/intrin_i.h
+48
View File
@@ -59,6 +59,54 @@ KiInitGdtEntry(PKGDTENTRY64 Entry, ULONG64 Base, ULONG Size, UCHAR Type, UCHAR D
Entry->MustBeZero = 0;
}
extern ULONG64 KeFeatureBits;
FORCEINLINE
VOID
KiSaveXState(
_Out_ PVOID Buffer,
_In_ ULONG64 ComponentMask)
{
ComponentMask &= ~XSTATE_MASK_LEGACY_SSE;
if (KeFeatureBits & KF_XSAVES)
{
_xsaves64(Buffer, ComponentMask);
}
else if (KeFeatureBits & KF_XSAVEOPT)
{
_xsaveopt64(Buffer, ComponentMask);
}
else if (KeFeatureBits & KF_XSTATE)
{
_xsave64(Buffer, ComponentMask);
}
else
{
_fxsave64(Buffer);
}
}
FORCEINLINE
VOID
KiRestoreXState(
_In_ PVOID Buffer,
_In_ ULONG64 ComponentMask)
{
ComponentMask &= ~XSTATE_MASK_LEGACY_SSE;
if (KeFeatureBits & KF_XSAVES)
{
_xrstors64(Buffer, ComponentMask);
}
else if (KeFeatureBits & KF_XSTATE)
{
_xrstor64(Buffer, ComponentMask);
}
else
{
_fxrstor64(Buffer);
}
}
#if defined(__GNUC__)
static __inline__ __attribute__((always_inline)) void __lgdt(void *Source)