mirror of
https://github.com/reactos/reactos.git
synced 2024-11-28 05:53:31 +08:00
6e9ff14e26
Addendum to608032bdand835c3023. The IRQL is actually raised by KeFreezeExecution() and lowered by KeThawExecution(), always to HIGH_IRQL on MP systems, or if necessary on UP. These functions are called respectively by KdEnterDebugger() and KdExitDebugger().
343 lines
11 KiB
C
343 lines
11 KiB
C
/*
|
|
* PROJECT: ReactOS Kernel
|
|
* LICENSE: GPL - See COPYING in the top level directory
|
|
* FILE: ntoskrnl/kd64/kdtrap.c
|
|
* PURPOSE: KD64 Trap Handlers
|
|
* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
|
|
* Stefan Ginsberg (stefan.ginsberg@reactos.org)
|
|
*/
|
|
|
|
/* INCLUDES ******************************************************************/
|
|
|
|
#include <ntoskrnl.h>
|
|
#define NDEBUG
|
|
#include <debug.h>
|
|
|
|
//
|
|
// Retrieves the ComponentId and Level for BREAKPOINT_PRINT
|
|
// and OutputString and OutputStringLength for BREAKPOINT_PROMPT.
|
|
//
|
|
#if defined(_X86_)
|
|
|
|
//
|
|
// EBX/EDI on x86
|
|
//
|
|
#define KdpGetParameterThree(Context) ((Context)->Ebx)
|
|
#define KdpGetParameterFour(Context) ((Context)->Edi)
|
|
|
|
#elif defined(_AMD64_)
|
|
|
|
//
|
|
// R8/R9 on AMD64
|
|
//
|
|
#define KdpGetParameterThree(Context) ((Context)->R8)
|
|
#define KdpGetParameterFour(Context) ((Context)->R9)
|
|
|
|
#elif defined(_ARM_)
|
|
|
|
//
|
|
// R3/R4 on ARM
|
|
//
|
|
#define KdpGetParameterThree(Context) ((Context)->R3)
|
|
#define KdpGetParameterFour(Context) ((Context)->R4)
|
|
|
|
#else
|
|
#error Unsupported Architecture
|
|
#endif
|
|
|
|
/* FUNCTIONS *****************************************************************/
|
|
|
|
BOOLEAN
|
|
NTAPI
|
|
KdpReport(IN PKTRAP_FRAME TrapFrame,
|
|
IN PKEXCEPTION_FRAME ExceptionFrame,
|
|
IN PEXCEPTION_RECORD ExceptionRecord,
|
|
IN PCONTEXT ContextRecord,
|
|
IN KPROCESSOR_MODE PreviousMode,
|
|
IN BOOLEAN SecondChanceException)
|
|
{
|
|
BOOLEAN Enable, Handled;
|
|
PKPRCB Prcb;
|
|
NTSTATUS ExceptionCode;
|
|
|
|
/*
|
|
* Determine whether to pass the exception to the debugger.
|
|
* First, check if this is a "debug exception", meaning breakpoint
|
|
* (including debug service), single step and assertion failure exceptions.
|
|
*/
|
|
ExceptionCode = ExceptionRecord->ExceptionCode;
|
|
if ((ExceptionCode == STATUS_BREAKPOINT) ||
|
|
(ExceptionCode == STATUS_SINGLE_STEP) ||
|
|
(ExceptionCode == STATUS_ASSERTION_FAILURE))
|
|
{
|
|
/* This is a debug exception; we always pass them to the debugger */
|
|
}
|
|
else if (NtGlobalFlag & FLG_STOP_ON_EXCEPTION)
|
|
{
|
|
/*
|
|
* Not a debug exception, but the stop-on-exception flag is set,
|
|
* meaning the debugger requests that we pass it first chance
|
|
* exceptions. However, some exceptions are always passed to the
|
|
* exception handler first, namely exceptions with a code that isn't
|
|
* an error or warning code, and also exceptions with the special
|
|
* STATUS_PORT_DISCONNECTED code (an error code).
|
|
*/
|
|
if ((SecondChanceException == FALSE) &&
|
|
((ExceptionCode == STATUS_PORT_DISCONNECTED) ||
|
|
(NT_SUCCESS(ExceptionCode))))
|
|
{
|
|
/* Let the exception handler, if any, try to handle it */
|
|
return FALSE;
|
|
}
|
|
}
|
|
else if (SecondChanceException == FALSE)
|
|
{
|
|
/*
|
|
* This isn't a debug exception and the stop-on-exception flag isn't set,
|
|
* so don't bother handling it
|
|
*/
|
|
return FALSE;
|
|
}
|
|
|
|
/* Enter the debugger */
|
|
Enable = KdEnterDebugger(TrapFrame, ExceptionFrame);
|
|
|
|
/*
|
|
* Get the KPRCB and save the CPU Control State manually instead of
|
|
* using KiSaveProcessorState, since we already have a valid CONTEXT.
|
|
*/
|
|
Prcb = KeGetCurrentPrcb();
|
|
KiSaveProcessorControlState(&Prcb->ProcessorState);
|
|
KdpMoveMemory(&Prcb->ProcessorState.ContextFrame,
|
|
ContextRecord,
|
|
sizeof(CONTEXT));
|
|
|
|
/* Report the new state */
|
|
Handled = KdpReportExceptionStateChange(ExceptionRecord,
|
|
&Prcb->ProcessorState.
|
|
ContextFrame,
|
|
SecondChanceException);
|
|
|
|
/* Now restore the processor state, manually again. */
|
|
KdpMoveMemory(ContextRecord,
|
|
&Prcb->ProcessorState.ContextFrame,
|
|
sizeof(CONTEXT));
|
|
KiRestoreProcessorControlState(&Prcb->ProcessorState);
|
|
|
|
/* Exit the debugger and clear the CTRL-C state */
|
|
KdExitDebugger(Enable);
|
|
KdpControlCPressed = FALSE;
|
|
return Handled;
|
|
}
|
|
|
|
BOOLEAN
|
|
NTAPI
|
|
KdpTrap(IN PKTRAP_FRAME TrapFrame,
|
|
IN PKEXCEPTION_FRAME ExceptionFrame,
|
|
IN PEXCEPTION_RECORD ExceptionRecord,
|
|
IN PCONTEXT ContextRecord,
|
|
IN KPROCESSOR_MODE PreviousMode,
|
|
IN BOOLEAN SecondChanceException)
|
|
{
|
|
BOOLEAN Unload;
|
|
ULONG_PTR ProgramCounter;
|
|
BOOLEAN Handled;
|
|
NTSTATUS ReturnStatus;
|
|
USHORT ReturnLength;
|
|
|
|
/*
|
|
* Check if we got a STATUS_BREAKPOINT with a SubID for Print, Prompt or
|
|
* Load/Unload symbols. Make sure it isn't a software breakpoints as those
|
|
* are handled by KdpReport.
|
|
*/
|
|
if ((ExceptionRecord->ExceptionCode == STATUS_BREAKPOINT) &&
|
|
(ExceptionRecord->ExceptionInformation[0] != BREAKPOINT_BREAK))
|
|
{
|
|
/* Save Program Counter */
|
|
ProgramCounter = KeGetContextPc(ContextRecord);
|
|
|
|
/* Check what kind of operation was requested from us */
|
|
Unload = FALSE;
|
|
switch (ExceptionRecord->ExceptionInformation[0])
|
|
{
|
|
/* DbgPrint */
|
|
case BREAKPOINT_PRINT:
|
|
|
|
/* Call the worker routine */
|
|
ReturnStatus = KdpPrint((ULONG)KdpGetParameterThree(ContextRecord),
|
|
(ULONG)KdpGetParameterFour(ContextRecord),
|
|
(PCHAR)ExceptionRecord->ExceptionInformation[1],
|
|
(USHORT)ExceptionRecord->ExceptionInformation[2],
|
|
PreviousMode,
|
|
TrapFrame,
|
|
ExceptionFrame,
|
|
&Handled);
|
|
|
|
/* Update the return value for the caller */
|
|
KeSetContextReturnRegister(ContextRecord, ReturnStatus);
|
|
break;
|
|
|
|
/* DbgPrompt */
|
|
case BREAKPOINT_PROMPT:
|
|
|
|
/* Call the worker routine */
|
|
ReturnLength = KdpPrompt((PCHAR)ExceptionRecord->ExceptionInformation[1],
|
|
(USHORT)ExceptionRecord->ExceptionInformation[2],
|
|
(PCHAR)KdpGetParameterThree(ContextRecord),
|
|
(USHORT)KdpGetParameterFour(ContextRecord),
|
|
PreviousMode,
|
|
TrapFrame,
|
|
ExceptionFrame);
|
|
Handled = TRUE;
|
|
|
|
/* Update the return value for the caller */
|
|
KeSetContextReturnRegister(ContextRecord, ReturnLength);
|
|
break;
|
|
|
|
/* DbgUnLoadImageSymbols */
|
|
case BREAKPOINT_UNLOAD_SYMBOLS:
|
|
|
|
/* Drop into the load case below, with the unload parameter */
|
|
Unload = TRUE;
|
|
|
|
/* DbgLoadImageSymbols */
|
|
case BREAKPOINT_LOAD_SYMBOLS:
|
|
|
|
/* Call the worker routine */
|
|
KdpSymbol((PSTRING)ExceptionRecord->ExceptionInformation[1],
|
|
(PKD_SYMBOLS_INFO)ExceptionRecord->ExceptionInformation[2],
|
|
Unload,
|
|
PreviousMode,
|
|
ContextRecord,
|
|
TrapFrame,
|
|
ExceptionFrame);
|
|
Handled = TRUE;
|
|
break;
|
|
|
|
/* DbgCommandString */
|
|
case BREAKPOINT_COMMAND_STRING:
|
|
|
|
/* Call the worker routine */
|
|
KdpCommandString((PSTRING)ExceptionRecord->ExceptionInformation[1],
|
|
(PSTRING)ExceptionRecord->ExceptionInformation[2],
|
|
PreviousMode,
|
|
ContextRecord,
|
|
TrapFrame,
|
|
ExceptionFrame);
|
|
Handled = TRUE;
|
|
break;
|
|
|
|
/* Anything else, do nothing */
|
|
default:
|
|
|
|
/* Invalid debug service! Don't handle this! */
|
|
Handled = FALSE;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* If the PC was not updated, we'll increment it ourselves so execution
|
|
* continues past the breakpoint.
|
|
*/
|
|
if (ProgramCounter == KeGetContextPc(ContextRecord))
|
|
{
|
|
/* Update it */
|
|
KeSetContextPc(ContextRecord,
|
|
ProgramCounter + KD_BREAKPOINT_SIZE);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Call the worker routine */
|
|
Handled = KdpReport(TrapFrame,
|
|
ExceptionFrame,
|
|
ExceptionRecord,
|
|
ContextRecord,
|
|
PreviousMode,
|
|
SecondChanceException);
|
|
}
|
|
|
|
/* Return TRUE or FALSE to caller */
|
|
return Handled;
|
|
}
|
|
|
|
BOOLEAN
|
|
NTAPI
|
|
KdpStub(IN PKTRAP_FRAME TrapFrame,
|
|
IN PKEXCEPTION_FRAME ExceptionFrame,
|
|
IN PEXCEPTION_RECORD ExceptionRecord,
|
|
IN PCONTEXT ContextRecord,
|
|
IN KPROCESSOR_MODE PreviousMode,
|
|
IN BOOLEAN SecondChanceException)
|
|
{
|
|
ULONG_PTR ExceptionCommand;
|
|
|
|
/* Check if this was a breakpoint due to DbgPrint or Load/UnloadSymbols */
|
|
ExceptionCommand = ExceptionRecord->ExceptionInformation[0];
|
|
if ((ExceptionRecord->ExceptionCode == STATUS_BREAKPOINT) &&
|
|
(ExceptionRecord->NumberParameters > 0) &&
|
|
((ExceptionCommand == BREAKPOINT_LOAD_SYMBOLS) ||
|
|
(ExceptionCommand == BREAKPOINT_UNLOAD_SYMBOLS) ||
|
|
(ExceptionCommand == BREAKPOINT_COMMAND_STRING) ||
|
|
(ExceptionCommand == BREAKPOINT_PRINT)))
|
|
{
|
|
/* This we can handle: simply bump the Program Counter */
|
|
KeSetContextPc(ContextRecord,
|
|
KeGetContextPc(ContextRecord) + KD_BREAKPOINT_SIZE);
|
|
return TRUE;
|
|
}
|
|
else if (KdPitchDebugger)
|
|
{
|
|
/* There's no debugger, fail. */
|
|
return FALSE;
|
|
}
|
|
else if ((KdAutoEnableOnEvent) &&
|
|
(KdPreviouslyEnabled) &&
|
|
!(KdDebuggerEnabled) &&
|
|
(NT_SUCCESS(KdEnableDebugger())) &&
|
|
(KdDebuggerEnabled))
|
|
{
|
|
/* Debugging was Auto-Enabled. We can now send this to KD. */
|
|
return KdpTrap(TrapFrame,
|
|
ExceptionFrame,
|
|
ExceptionRecord,
|
|
ContextRecord,
|
|
PreviousMode,
|
|
SecondChanceException);
|
|
}
|
|
else
|
|
{
|
|
/* FIXME: All we can do in this case is trace this exception */
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
BOOLEAN
|
|
NTAPI
|
|
KdIsThisAKdTrap(IN PEXCEPTION_RECORD ExceptionRecord,
|
|
IN PCONTEXT Context,
|
|
IN KPROCESSOR_MODE PreviousMode)
|
|
{
|
|
#ifdef _WINKD_
|
|
/*
|
|
* Determine if this is a valid debug service call and make sure that
|
|
* it isn't a software breakpoint
|
|
*/
|
|
if ((ExceptionRecord->ExceptionCode == STATUS_BREAKPOINT) &&
|
|
(ExceptionRecord->NumberParameters > 0) &&
|
|
(ExceptionRecord->ExceptionInformation[0] != BREAKPOINT_BREAK))
|
|
{
|
|
/* Then we have to handle it */
|
|
return TRUE;
|
|
}
|
|
else
|
|
{
|
|
/* We don't have to handle it */
|
|
return FALSE;
|
|
}
|
|
#else
|
|
/* KDBG has its own mechanism for ignoring user mode exceptions */
|
|
return FALSE;
|
|
#endif
|
|
}
|