reactos/ntoskrnl/include/internal/amd64/intrin_i.h
2022-08-22 11:22:08 +02:00

117 lines
2.5 KiB
C

#ifndef _INTRIN_INTERNAL_
#define _INTRIN_INTERNAL_
FORCEINLINE
VOID
KeSetCurrentIrql(KIRQL Irql)
{
__writecr8(Irql);
}
FORCEINLINE
PKGDTENTRY64
KiGetGdtEntry(PVOID pGdt, USHORT Selector)
{
return (PKGDTENTRY64)((ULONG64)pGdt + (Selector & ~RPL_MASK));
}
FORCEINLINE
PVOID
KiGetGdtDescriptorBase(PKGDTENTRY Entry)
{
return (PVOID)((ULONG64)Entry->BaseLow |
(ULONG64)Entry->Bytes.BaseMiddle << 16 |
(ULONG64)Entry->Bytes.BaseHigh << 24 |
(ULONG64)Entry->BaseUpper << 32);
}
FORCEINLINE
VOID
KiSetGdtDescriptorBase(PKGDTENTRY Entry, ULONG64 Base)
{
Entry->BaseLow = Base & 0xffff;
Entry->Bits.BaseMiddle = (Base >> 16) & 0xff;
Entry->Bits.BaseHigh = (Base >> 24) & 0xff;
Entry->BaseUpper = Base >> 32;
}
FORCEINLINE
VOID
KiSetGdtDescriptorLimit(PKGDTENTRY Entry, ULONG Limit)
{
Entry->LimitLow = Limit & 0xffff;
Entry->Bits.LimitHigh = Limit >> 16;
}
FORCEINLINE
VOID
KiInitGdtEntry(PKGDTENTRY64 Entry, ULONG64 Base, ULONG Size, UCHAR Type, UCHAR Dpl)
{
KiSetGdtDescriptorBase(Entry, Base);
KiSetGdtDescriptorLimit(Entry, Size - 1);
Entry->Bits.Type = Type;
Entry->Bits.Dpl = Dpl;
Entry->Bits.Present = 1;
Entry->Bits.System = 0;
Entry->Bits.LongMode = 0;
Entry->Bits.DefaultBig = 0;
Entry->Bits.Granularity = 0;
Entry->MustBeZero = 0;
}
#if defined(__GNUC__)
static __inline__ __attribute__((always_inline)) void __lgdt(void *Source)
{
__asm__ __volatile__("lgdt %0" : : "m"(*(short*)Source));
}
static __inline__ __attribute__((always_inline)) void __sgdt(void *Destination)
{
__asm__ __volatile__("sgdt %0" : : "m"(*(short*)Destination) : "memory");
}
static __inline__ __attribute__((always_inline)) void __lldt(unsigned short Value)
{
__asm__ __volatile__("lldt %0" : : "rm"(Value));
}
static __inline__ __attribute__((always_inline)) void __sldt(void *Destination)
{
__asm__ __volatile__("sldt %0" : : "m"(*(short*)Destination) : "memory");
}
static __inline__ __attribute__((always_inline)) void __ltr(unsigned short Source)
{
__asm__ __volatile__("ltr %0" : : "rm"(Source));
}
static __inline__ __attribute__((always_inline)) void __str(unsigned short *Destination)
{
__asm__ __volatile__("str %0" : : "m"(*Destination) : "memory");
}
#elif defined(_MSC_VER)
void __lgdt(void *Source);
void __sgdt(void *Destination);
void __lldt(unsigned short Value);
void __sldt(void *Destination);
void __ltr(unsigned short Source);
void __str(unsigned short *Destination);
#else
#error Unknown compiler for inline assembler
#endif
#endif
/* EOF */