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reactos/ntoskrnl/ke/amd64/context.c
Timo Kreuzer a2f7de7ee8
Amd64/misc 64bit fixes (#236) 
[REACTOS] Misc 64 bit fixes

* [NTOS:MM] Allow MEM_DOS_LIM in NtMapViewOfSection on x64 as well
* [NTOS:MM] Implement x64 version of MmIsDisabledPage
* [HAL] Remove obsolete code
* [NTOS:KE] Fix amd64 version of KeContextToTrapFrame and KeTrapFrameToContext
* [XDK] Fix CONTEXT_XSTATE definition
* [PCNET] Convert physical address types from pointers to PHYSICAL_ADDRESS
2018-01-01 12:07:50 +01:00

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/*
* PROJECT: ReactOS Kernel
* LICENSE: GPL - See COPYING in the top level directory
* PURPOSE: CONTEXT related functions
* PROGRAMMERS: Timo Kreuzer (timo.kreuzer@reactos.org)
*/
/* INCLUDES ******************************************************************/
#include <ntoskrnl.h>
#define NDEBUG
#include <debug.h>
/* FUNCTIONS *****************************************************************/
VOID
NTAPI
KeContextToTrapFrame(IN PCONTEXT Context,
IN OUT PKEXCEPTION_FRAME ExceptionFrame,
IN OUT PKTRAP_FRAME TrapFrame,
IN ULONG ContextFlags,
IN KPROCESSOR_MODE PreviousMode)
{
KIRQL OldIrql;
/* Make sure we have an amd64 context, then remove the flag */
ASSERT(ContextFlags & CONTEXT_AMD64);
ContextFlags &= ~CONTEXT_AMD64;
/* Do this at APC_LEVEL */
OldIrql = KeGetCurrentIrql();
if (OldIrql < APC_LEVEL) KeRaiseIrql(APC_LEVEL, &OldIrql);
/* Handle integer registers */
if (ContextFlags & CONTEXT_INTEGER)
{
TrapFrame->Rax = Context->Rax;
TrapFrame->Rbx = Context->Rbx;
TrapFrame->Rcx = Context->Rcx;
TrapFrame->Rdx = Context->Rdx;
TrapFrame->Rsi = Context->Rsi;
TrapFrame->Rdi = Context->Rdi;
TrapFrame->Rbp = Context->Rbp;
TrapFrame->R8 = Context->R8;
TrapFrame->R9 = Context->R9;
TrapFrame->R10 = Context->R10;
TrapFrame->R11 = Context->R11;
if (ExceptionFrame)
{
ExceptionFrame->R12 = Context->R12;
ExceptionFrame->R13 = Context->R13;
ExceptionFrame->R14 = Context->R14;
ExceptionFrame->R15 = Context->R15;
}
}
/* Handle floating point registers */
if ((ContextFlags & CONTEXT_FLOATING_POINT) &&
((Context->SegCs & MODE_MASK) != KernelMode))
{
TrapFrame->MxCsr = Context->MxCsr;
TrapFrame->Xmm0 = Context->Xmm0;
TrapFrame->Xmm1 = Context->Xmm1;
TrapFrame->Xmm2 = Context->Xmm2;
TrapFrame->Xmm3 = Context->Xmm3;
TrapFrame->Xmm4 = Context->Xmm4;
TrapFrame->Xmm5 = Context->Xmm5;
if (ExceptionFrame)
{
ExceptionFrame->Xmm6 = Context->Xmm6;
ExceptionFrame->Xmm7 = Context->Xmm7;
ExceptionFrame->Xmm8 = Context->Xmm8;
ExceptionFrame->Xmm9 = Context->Xmm9;
ExceptionFrame->Xmm10 = Context->Xmm10;
ExceptionFrame->Xmm11 = Context->Xmm11;
ExceptionFrame->Xmm12 = Context->Xmm12;
ExceptionFrame->Xmm13 = Context->Xmm13;
ExceptionFrame->Xmm14 = Context->Xmm14;
ExceptionFrame->Xmm15 = Context->Xmm15;
}
}
/* Handle control registers */
if (ContextFlags & CONTEXT_CONTROL)
{
/* Check if this was a Kernel Trap */
if ((Context->SegCs & MODE_MASK) == KernelMode)
{
/* Set valid selectors */
TrapFrame->SegCs = KGDT64_R0_CODE;
TrapFrame->SegSs = KGDT64_R0_DATA;
}
else
{
/* Copy selectors */
TrapFrame->SegCs = Context->SegCs;
TrapFrame->SegSs = Context->SegSs;
}
/* RIP, RSP, EFLAGS */
TrapFrame->Rip = Context->Rip;
TrapFrame->Rsp = Context->Rsp;
TrapFrame->EFlags = Context->EFlags;
}
/* Handle segment selectors */
if (ContextFlags & CONTEXT_SEGMENTS)
{
/* Check if this was a Kernel Trap */
if ((Context->SegCs & MODE_MASK) == KernelMode)
{
/* Set valid selectors */
TrapFrame->SegDs = KGDT64_R3_DATA | RPL_MASK;
TrapFrame->SegEs = KGDT64_R3_DATA | RPL_MASK;
TrapFrame->SegFs = KGDT64_R3_CMTEB | RPL_MASK;
TrapFrame->SegGs = KGDT64_R3_DATA | RPL_MASK;
}
else
{
/* Copy selectors */
TrapFrame->SegDs = Context->SegDs;
TrapFrame->SegEs = Context->SegEs;
TrapFrame->SegFs = Context->SegFs;
TrapFrame->SegGs = Context->SegGs;
}
}
/* Handle debug registers */
if (ContextFlags & CONTEXT_DEBUG_REGISTERS)
{
/* Copy the debug registers */
TrapFrame->Dr0 = Context->Dr0;
TrapFrame->Dr1 = Context->Dr1;
TrapFrame->Dr2 = Context->Dr2;
TrapFrame->Dr3 = Context->Dr3;
TrapFrame->Dr6 = Context->Dr6;
TrapFrame->Dr7 = Context->Dr7;
}
/* Restore IRQL */
if (OldIrql < APC_LEVEL) KeLowerIrql(OldIrql);
}
VOID
NTAPI
KeTrapFrameToContext(IN PKTRAP_FRAME TrapFrame,
IN PKEXCEPTION_FRAME ExceptionFrame,
IN OUT PCONTEXT Context)
{
ULONG ContextFlags;
KIRQL OldIrql;
/* Do this at APC_LEVEL */
OldIrql = KeGetCurrentIrql();
if (OldIrql < APC_LEVEL) KeRaiseIrql(APC_LEVEL, &OldIrql);
/* Make sure we have an amd64 context, then remove the flag */
ContextFlags = Context->ContextFlags;
ASSERT(ContextFlags & CONTEXT_AMD64);
ContextFlags &= ~CONTEXT_AMD64;
/* Handle integer registers */
if (ContextFlags & CONTEXT_INTEGER)
{
Context->Rax = TrapFrame->Rax;
Context->Rbx = TrapFrame->Rbx;
Context->Rcx = TrapFrame->Rcx;
Context->Rdx = TrapFrame->Rdx;
Context->Rsi = TrapFrame->Rsi;
Context->Rdi = TrapFrame->Rdi;
Context->Rbp = TrapFrame->Rbp;
Context->R8 = TrapFrame->R8;
Context->R9 = TrapFrame->R9;
Context->R10 = TrapFrame->R10;
Context->R11 = TrapFrame->R11;
if (ExceptionFrame)
{
Context->R12 = ExceptionFrame->R12;
Context->R13 = ExceptionFrame->R13;
Context->R14 = ExceptionFrame->R14;
Context->R15 = ExceptionFrame->R15;
}
}
/* Handle floating point registers */
if ((ContextFlags & CONTEXT_FLOATING_POINT) &&
((TrapFrame->SegCs & MODE_MASK) != KernelMode))
{
Context->Xmm0 = TrapFrame->Xmm0;
Context->Xmm1 = TrapFrame->Xmm1;
Context->Xmm2 = TrapFrame->Xmm2;
Context->Xmm3 = TrapFrame->Xmm3;
Context->Xmm4 = TrapFrame->Xmm4;
Context->Xmm5 = TrapFrame->Xmm5;
if (ExceptionFrame)
{
Context->Xmm6 = ExceptionFrame->Xmm6;
Context->Xmm7 = ExceptionFrame->Xmm7;
Context->Xmm8 = ExceptionFrame->Xmm8;
Context->Xmm9 = ExceptionFrame->Xmm9;
Context->Xmm10 = ExceptionFrame->Xmm10;
Context->Xmm11 = ExceptionFrame->Xmm11;
Context->Xmm12 = ExceptionFrame->Xmm12;
Context->Xmm13 = ExceptionFrame->Xmm13;
Context->Xmm14 = ExceptionFrame->Xmm14;
Context->Xmm15 = ExceptionFrame->Xmm15;
}
}
/* Handle control registers */
if (ContextFlags & CONTEXT_CONTROL)
{
/* Check if this was a Kernel Trap */
if ((TrapFrame->SegCs & MODE_MASK) == KernelMode)
{
/* Set valid selectors */
Context->SegCs = KGDT64_R0_CODE;
Context->SegSs = KGDT64_R0_DATA;
}
else
{
/* Copy selectors */
Context->SegCs = TrapFrame->SegCs;
Context->SegSs = TrapFrame->SegSs;
}
/* Copy RIP, RSP, EFLAGS */
Context->Rip = TrapFrame->Rip;
Context->Rsp = TrapFrame->Rsp;
Context->EFlags = TrapFrame->EFlags;
}
/* Handle segment selectors */
if (ContextFlags & CONTEXT_SEGMENTS)
{
/* Check if this was a Kernel Trap */
if ((TrapFrame->SegCs & MODE_MASK) == KernelMode)
{
/* Set valid selectors */
Context->SegDs = KGDT64_R3_DATA | RPL_MASK;
Context->SegEs = KGDT64_R3_DATA | RPL_MASK;
Context->SegFs = KGDT64_R3_CMTEB | RPL_MASK;
Context->SegGs = KGDT64_R3_DATA | RPL_MASK;
}
else
{
/* Copy selectors */
Context->SegDs = TrapFrame->SegDs;
Context->SegEs = TrapFrame->SegEs;
Context->SegFs = TrapFrame->SegFs;
Context->SegGs = TrapFrame->SegGs;
}
}
/* Handle debug registers */
if (ContextFlags & CONTEXT_DEBUG_REGISTERS)
{
/* Copy the debug registers */
Context->Dr0 = TrapFrame->Dr0;
Context->Dr1 = TrapFrame->Dr1;
Context->Dr2 = TrapFrame->Dr2;
Context->Dr3 = TrapFrame->Dr3;
Context->Dr6 = TrapFrame->Dr6;
Context->Dr7 = TrapFrame->Dr7;
}
/* Restore IRQL */
if (OldIrql < APC_LEVEL) KeLowerIrql(OldIrql);
}
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