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 20 of file exp.c.

{
    KIRQL OldIrql;
    
    //
    // Do this at APC_LEVEL
    //
    OldIrql = KeGetCurrentIrql();
    if (OldIrql < APC_LEVEL) KeRaiseIrql(APC_LEVEL, &OldIrql);
    
    //
    // Start with the Control flags
    //
    if ((Context->ContextFlags & CONTEXT_CONTROL) == CONTEXT_CONTROL)
    {
        //
        // So this basically means all the special stuff
        //
        if (PreviousMode == UserMode)
        {
            //
            // ARM has register banks
            //
            TrapFrame->UserSp = Context->Sp;
            TrapFrame->UserLr = Context->Lr;
        }
        else
        {
            //
            // ARM has register banks
            //
            TrapFrame->SvcSp = Context->Sp;
            TrapFrame->SvcLr = Context->Lr;
        }
        
        //
        // The rest is already in the right mode
        //
        TrapFrame->Pc = Context->Pc;
        TrapFrame->Spsr = Context->Psr;
    }
    
    //
    // Now do the integers
    //
    if ((Context->ContextFlags & CONTEXT_INTEGER) == CONTEXT_INTEGER)
    {
        //
        // Basically everything else but FPU
        //
        TrapFrame->R0 = Context->R0;
        TrapFrame->R1 = Context->R1;
        TrapFrame->R2 = Context->R2;
        TrapFrame->R3 = Context->R3;
        TrapFrame->R4 = Context->R4;
        TrapFrame->R5 = Context->R5;
        TrapFrame->R6 = Context->R6;
        TrapFrame->R7 = Context->R7;
        TrapFrame->R8 = Context->R8;
        TrapFrame->R0 = Context->R9;
        TrapFrame->R10 = Context->R10;
        TrapFrame->R11 = Context->R11;
        TrapFrame->R12 = Context->R12;
    }
    
    //
    // Restore IRQL
    //
    if (OldIrql < APC_LEVEL) KeLowerIrql(OldIrql);  
}

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