VOID NTAPI KeContextToTrapFrame	(	IN PCONTEXT	Context,
		IN OUT PKEXCEPTION_FRAME	ExceptionFrame,
		IN OUT PKTRAP_FRAME	TrapFrame,
		IN ULONG	ContextFlags,
		IN KPROCESSOR_MODE	PreviousMode
	)
Definition at line 19 of file context.c.
{
    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))
    {
        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 == KGDT64_R0_CODE)
        {
            /* 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 == KGDT64_R0_CODE)
        {
            /* 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);
}
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