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Fix and simplify KdpSysReadControlSpace, hint by Stefan

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svn path=/branches/ros-amd64-bringup/; revision=43702
This commit is contained in:
Timo Kreuzer
2009-10-23 21:46:49 +00:00
parent 62047d7163
commit 3e678b588b
1 changed files with 33 additions and 48 deletions
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reactos/ntoskrnl/kd64/amd64/kdsup.c
+33 -48
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@@ -176,61 +176,46 @@ KdpSysReadControlSpace(IN ULONG Processor,
OUT PULONG ActualLength)
{
PVOID ControlStart;
ULONG RealLength;
PKPRCB Prcb = KiProcessorBlock[Processor];
PKIPCR Pcr = CONTAINING_RECORD(Prcb, KIPCR, Prcb);
if ((ULONG)BaseAddress <= 2)
switch (BaseAddress)
{
PKPRCB Prcb = KiProcessorBlock[Processor];
PKIPCR Pcr = CONTAINING_RECORD(Prcb, KIPCR, Prcb);
case AMD64_DEBUG_CONTROL_SPACE_KPCR:
/* Copy a pointer to the Pcr */
ControlStart = &Pcr;
*ActualLength = sizeof(PVOID);
break;
switch ((ULONG_PTR)BaseAddress)
{
case AMD64_DEBUG_CONTROL_SPACE_KPCR:
/* Copy a pointer to the Pcr */
ControlStart = &Pcr;
RealLength = sizeof(PVOID);
break;
case AMD64_DEBUG_CONTROL_SPACE_KPRCB:
/* Copy a pointer to the Prcb */
ControlStart = &Prcb;
*ActualLength = sizeof(PVOID);
break;
case AMD64_DEBUG_CONTROL_SPACE_KPRCB:
/* Copy a pointer to the Prcb */
ControlStart = &Prcb;
RealLength = sizeof(PVOID);
break;
case AMD64_DEBUG_CONTROL_SPACE_KSPECIAL:
/* Copy SpecialRegisters */
ControlStart = &Prcb->ProcessorState.SpecialRegisters;
*ActualLength = sizeof(KSPECIAL_REGISTERS);
break;
case AMD64_DEBUG_CONTROL_SPACE_KSPECIAL:
/* Copy SpecialRegisters */
ControlStart = &Prcb->ProcessorState.SpecialRegisters;
RealLength = sizeof(KSPECIAL_REGISTERS);
break;
case AMD64_DEBUG_CONTROL_SPACE_KTHREAD:
/* Copy a pointer to the current Thread */
ControlStart = &Prcb->CurrentThread;
*ActualLength = sizeof(PVOID);
break;
case AMD64_DEBUG_CONTROL_SPACE_KTHREAD:
/* Copy a pointer to the current Thread */
ControlStart = &Prcb->CurrentThread;
RealLength = sizeof(PVOID);
break;
default:
RealLength = 0;
ControlStart = NULL;
ASSERT(FALSE);
return STATUS_UNSUCCESSFUL;
}
if (RealLength < Length) Length = RealLength;
/* Copy the memory */
RtlCopyMemory(Buffer, ControlStart, Length);
*ActualLength = Length;
/* Finish up */
return STATUS_SUCCESS;
}
else
{
/* Invalid request */
*ActualLength = 0;
return STATUS_UNSUCCESSFUL;
default:
*ActualLength = 0;
ASSERT(FALSE);
return STATUS_UNSUCCESSFUL;
}
/* Copy the memory */
RtlCopyMemory(Buffer, ControlStart, min(Length, *ActualLength));
/* Finish up */
return STATUS_SUCCESS;
}
NTSTATUS