+++ /dev/null
-/*
- * 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),
- (LPSTR)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((LPSTR)ExceptionRecord->ExceptionInformation[1],
- (USHORT)ExceptionRecord->ExceptionInformation[2],
- (LPSTR)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)
-{
- /*
- * 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;
- }
-}
projects / reactos.git / blobdiff