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WIP [NTOS:KE/x64] Implement KiSave/RestoreXState

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This commit is contained in:
Timo Kreuzer 2024-12-25 13:44:21 +01:00
parent bccdb41577
commit 0b74b66d75
1 changed files with 61 additions and 0 deletions
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61
ntoskrnl/include/internal/amd64/intrin_i.h
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@ -59,6 +59,67 @@ KiInitGdtEntry(PKGDTENTRY64 Entry, ULONG64 Base, ULONG Size, UCHAR Type, UCHAR D
Entry->MustBeZero = 0;
}
// FIXME: these should go to immintrin.h
void __cdecl _fxsave64(void *);
void __cdecl _xsave64(void *, unsigned __int64);
void __cdecl _xsaveopt64(void *, unsigned __int64);
void __cdecl _xsavec64(void *, unsigned __int64);
void __cdecl _xsaves64(void *, unsigned __int64);
void __cdecl _fxrstor64(void const *);
void __cdecl _xrstor64(void *, unsigned __int64);
void __cdecl _xrstors64(void *, unsigned __int64);
void __cdecl _xrstors64(void *, unsigned __int64);
unsigned __int64 __cdecl _xgetbv(unsigned int);
void __cdecl _xsetbv(unsigned int, unsigned __int64);
extern ULONG64 KeFeatureBits;
FORCEINLINE
VOID
KiSaveXState(
_Out_ PVOID Buffer,
_In_ ULONG64 ComponentMask)
{
ULONG64 npxState = ComponentMask & ~2;
if (KeFeatureBits & KF_XSAVES)
{
_xsaves64(Buffer, npxState);
}
else if (KeFeatureBits & KF_XSAVEOPT)
{
_xsaveopt64(Buffer, npxState);
}
else if (KeFeatureBits & KF_XSTATE)
{
_xsave64(Buffer, npxState);
}
else
{
_fxsave64(Buffer);
}
}
FORCEINLINE
VOID
KiRestoreXState(
_Inout_ PVOID Buffer,
_In_ ULONG64 ComponentMask)
{
ULONG64 npxState = ComponentMask & ~2;
if (KeFeatureBits & KF_XSAVES)
{
_xrstors64(Buffer, npxState);
}
else if (KeFeatureBits & KF_XSTATE)
{
_xrstor64(Buffer, npxState);
}
else
{
_fxrstor64(Buffer);
}
}
#if defined(__GNUC__)
static __inline__ __attribute__((always_inline)) void __lgdt(void *Source)