You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
326 lines
9.4 KiB
326 lines
9.4 KiB
/*++
|
|
|
|
Copyright (c) 1990 Microsoft Corporation
|
|
|
|
Module Name:
|
|
|
|
kdtrap.c
|
|
|
|
Abstract:
|
|
|
|
This module contains code to implement the target side of the portable
|
|
kernel debugger.
|
|
|
|
Author:
|
|
|
|
Bryan M. Willman (bryanwi) 25-Sep-90
|
|
|
|
Revision History:
|
|
|
|
--*/
|
|
|
|
#include "kdp.h"
|
|
|
|
#pragma alloc_text(PAGEKD, KdpTrap)
|
|
#pragma alloc_text(PAGEKD, KdIsThisAKdTrap)
|
|
|
|
BOOLEAN
|
|
KdpTrap (
|
|
IN PKTRAP_FRAME TrapFrame,
|
|
IN PKEXCEPTION_FRAME ExceptionFrame,
|
|
IN PEXCEPTION_RECORD ExceptionRecord,
|
|
IN PCONTEXT ContextRecord,
|
|
IN KPROCESSOR_MODE PreviousMode,
|
|
IN BOOLEAN SecondChance
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This routine is called whenever a exception is dispatched and the kernel
|
|
debugger is active.
|
|
|
|
Arguments:
|
|
|
|
TrapFrame - Supplies a pointer to a trap frame that describes the
|
|
trap.
|
|
|
|
ExceptionFrame - Supplies a pointer to a exception frame that describes
|
|
the trap.
|
|
|
|
ExceptionRecord - Supplies a pointer to an exception record that
|
|
describes the exception.
|
|
|
|
ContextRecord - Supplies the context at the time of the exception.
|
|
|
|
PreviousMode - Supplies the previous processor mode.
|
|
|
|
SecondChance - Supplies a boolean value that determines whether this is
|
|
the second chance (TRUE) that the exception has been raised.
|
|
|
|
Return Value:
|
|
|
|
A value of TRUE is returned if the exception is handled. Otherwise a
|
|
value of FALSE is returned.
|
|
|
|
--*/
|
|
|
|
{
|
|
|
|
BOOLEAN Completion = FALSE;
|
|
BOOLEAN UnloadSymbols = FALSE;
|
|
ULONG OldEip;
|
|
|
|
//
|
|
// Print, Prompt, Load symbols, Unload symbols, are all special
|
|
// cases of STATUS_BREAKPOINT
|
|
//
|
|
|
|
if ((ExceptionRecord->ExceptionCode == STATUS_BREAKPOINT) &&
|
|
(ExceptionRecord->ExceptionInformation[0] != BREAKPOINT_BREAK)) {
|
|
|
|
//
|
|
// Switch on the breakpoint code.
|
|
//
|
|
|
|
OldEip = ContextRecord->Eip;
|
|
switch (ExceptionRecord->ExceptionInformation[0]) {
|
|
|
|
//
|
|
// ExceptionInformation[1] - Address of the message.
|
|
// ExceptionInformation[2] - Length of the message.
|
|
// ContextRecord->Ebx - the Id of the calling component.
|
|
// ContextRecord->Edi - the output importance level.
|
|
//
|
|
|
|
case BREAKPOINT_PRINT:
|
|
ContextRecord->Eax = KdpPrint((ULONG)ContextRecord->Ebx,
|
|
(ULONG)ContextRecord->Edi,
|
|
(PCHAR)ExceptionRecord->ExceptionInformation[1],
|
|
(USHORT)ExceptionRecord->ExceptionInformation[2],
|
|
PreviousMode,
|
|
TrapFrame,
|
|
ExceptionFrame,
|
|
&Completion);
|
|
|
|
break;
|
|
|
|
//
|
|
// ExceptionInformation[1] - Address of the message.
|
|
// ExceptionInformation[2] - Length of the message.
|
|
// ContextRecord->Ebx - Address of the reply.
|
|
// ContextRecord->Edi - Maximum length of reply.
|
|
//
|
|
|
|
case BREAKPOINT_PROMPT:
|
|
ContextRecord->Eax = KdpPrompt((PCHAR)ExceptionRecord->ExceptionInformation[1],
|
|
(USHORT)ExceptionRecord->ExceptionInformation[2],
|
|
(PCHAR)ContextRecord->Ebx,
|
|
(USHORT)ContextRecord->Edi,
|
|
PreviousMode,
|
|
TrapFrame,
|
|
ExceptionFrame);
|
|
|
|
Completion = TRUE;
|
|
break;
|
|
|
|
//
|
|
// ExceptionInformation[1] is file name of new module.
|
|
// ExceptionInformation[2] is a pointer to the symbol
|
|
// information.
|
|
//
|
|
|
|
case BREAKPOINT_UNLOAD_SYMBOLS:
|
|
UnloadSymbols = TRUE;
|
|
|
|
//
|
|
// Fall through
|
|
//
|
|
|
|
case BREAKPOINT_LOAD_SYMBOLS:
|
|
KdpSymbol((PSTRING)ExceptionRecord->ExceptionInformation[1],
|
|
(PKD_SYMBOLS_INFO)ExceptionRecord->ExceptionInformation[2],
|
|
UnloadSymbols,
|
|
PreviousMode,
|
|
ContextRecord,
|
|
TrapFrame,
|
|
ExceptionFrame);
|
|
|
|
Completion = TRUE;
|
|
break;
|
|
|
|
case BREAKPOINT_COMMAND_STRING:
|
|
KdpCommandString((PSTRING)ExceptionRecord->ExceptionInformation[1],
|
|
(PSTRING)ExceptionRecord->ExceptionInformation[2],
|
|
PreviousMode,
|
|
ContextRecord,
|
|
TrapFrame,
|
|
ExceptionFrame);
|
|
Completion = TRUE;
|
|
break;
|
|
|
|
//
|
|
// Unknown command
|
|
//
|
|
|
|
default:
|
|
// return FALSE
|
|
break;
|
|
}
|
|
|
|
//
|
|
// If the kernel debugger did not update the EIP, then increment
|
|
// past the breakpoint instruction.
|
|
//
|
|
|
|
if (ContextRecord->Eip == OldEip) {
|
|
ContextRecord->Eip++;
|
|
}
|
|
|
|
} else {
|
|
|
|
//
|
|
// Report state change to the kernel debugger.
|
|
//
|
|
|
|
Completion = KdpReport(TrapFrame,
|
|
ExceptionFrame,
|
|
ExceptionRecord,
|
|
ContextRecord,
|
|
PreviousMode,
|
|
SecondChance);
|
|
|
|
}
|
|
|
|
return Completion;
|
|
}
|
|
|
|
BOOLEAN
|
|
KdIsThisAKdTrap (
|
|
IN PEXCEPTION_RECORD ExceptionRecord,
|
|
IN PCONTEXT ContextRecord,
|
|
IN KPROCESSOR_MODE PreviousMode
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This routine is called whenever a user-mode exception occurs and
|
|
it might be a kernel debugger exception (Like DbgPrint/DbgPrompt ).
|
|
|
|
Arguments:
|
|
|
|
ExceptionRecord - Supplies a pointer to an exception record that
|
|
describes the exception.
|
|
|
|
ContextRecord - Supplies the context at the time of the exception.
|
|
|
|
PreviousMode - Supplies the previous processor mode.
|
|
|
|
Return Value:
|
|
|
|
A value of TRUE is returned if this is for the kernel debugger.
|
|
Otherwise, a value of FALSE is returned.
|
|
|
|
--*/
|
|
|
|
{
|
|
UNREFERENCED_PARAMETER (ContextRecord);
|
|
UNREFERENCED_PARAMETER (PreviousMode);
|
|
|
|
if ((ExceptionRecord->ExceptionCode == STATUS_BREAKPOINT) &&
|
|
(ExceptionRecord->NumberParameters > 0) &&
|
|
(ExceptionRecord->ExceptionInformation[0] != BREAKPOINT_BREAK)) {
|
|
|
|
return TRUE;
|
|
} else {
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
BOOLEAN
|
|
KdpStub (
|
|
IN PKTRAP_FRAME TrapFrame,
|
|
IN PKEXCEPTION_FRAME ExceptionFrame,
|
|
IN PEXCEPTION_RECORD ExceptionRecord,
|
|
IN PCONTEXT ContextRecord,
|
|
IN KPROCESSOR_MODE PreviousMode,
|
|
IN BOOLEAN SecondChance
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This routine provides a kernel debugger stub routine to catch debug
|
|
prints in a checked system when the kernel debugger is not active.
|
|
|
|
Arguments:
|
|
|
|
TrapFrame - Supplies a pointer to a trap frame that describes the
|
|
trap.
|
|
|
|
ExceptionFrame - Supplies a pointer to a exception frame that describes
|
|
the trap.
|
|
|
|
ExceptionRecord - Supplies a pointer to an exception record that
|
|
describes the exception.
|
|
|
|
ContextRecord - Supplies the context at the time of the exception.
|
|
|
|
PreviousMode - Supplies the previous processor mode.
|
|
|
|
SecondChance - Supplies a boolean value that determines whether this is
|
|
the second chance (TRUE) that the exception has been raised.
|
|
|
|
Return Value:
|
|
|
|
A value of TRUE is returned if the exception is handled. Otherwise a
|
|
value of FALSE is returned.
|
|
|
|
--*/
|
|
|
|
{
|
|
UNREFERENCED_PARAMETER (TrapFrame);
|
|
UNREFERENCED_PARAMETER (ExceptionFrame);
|
|
UNREFERENCED_PARAMETER (PreviousMode);
|
|
UNREFERENCED_PARAMETER (SecondChance);
|
|
|
|
//
|
|
// If the breakpoint is a debug print, then return TRUE. Otherwise,
|
|
// return FALSE.
|
|
//
|
|
|
|
if ((ExceptionRecord->ExceptionCode == STATUS_BREAKPOINT) &&
|
|
(ExceptionRecord->NumberParameters > 0) &&
|
|
((ExceptionRecord->ExceptionInformation[0] == BREAKPOINT_LOAD_SYMBOLS) ||
|
|
(ExceptionRecord->ExceptionInformation[0] == BREAKPOINT_UNLOAD_SYMBOLS) ||
|
|
(ExceptionRecord->ExceptionInformation[0] == BREAKPOINT_COMMAND_STRING) ||
|
|
(ExceptionRecord->ExceptionInformation[0] == BREAKPOINT_PRINT))) {
|
|
ContextRecord->Eip++;
|
|
return TRUE;
|
|
|
|
} else if (KdPitchDebugger == TRUE) {
|
|
return FALSE;
|
|
|
|
} else if (KdAutoEnableOnEvent &&
|
|
KdPreviouslyEnabled &&
|
|
!KdDebuggerEnabled) {
|
|
// If there are multiple disables this may not reenable
|
|
// the debugger. Check before calling the full trap routine.
|
|
if (NT_SUCCESS(KdEnableDebugger()) &&
|
|
KdDebuggerEnabled) {
|
|
|
|
return KdpTrap(TrapFrame, ExceptionFrame, ExceptionRecord,
|
|
ContextRecord, PreviousMode, SecondChance);
|
|
|
|
} else {
|
|
return KdpCheckTracePoint(ExceptionRecord, ContextRecord);
|
|
}
|
|
|
|
} else {
|
|
return KdpCheckTracePoint(ExceptionRecord, ContextRecord);
|
|
}
|
|
}
|