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.
340 lines
11 KiB
340 lines
11 KiB
/*
|
|
* excptn.c - Exception functions of DBG DLL.
|
|
*
|
|
*/
|
|
#include <precomp.h>
|
|
#pragma hdrstop
|
|
|
|
|
|
|
|
BOOL DbgGPFault2(
|
|
PFFRAME16 pFFrame
|
|
)
|
|
/*
|
|
2nd chance GPFault handler (called via BOP)
|
|
*/
|
|
{
|
|
BOOL fResult;
|
|
|
|
fResult = FALSE; // Default to Event not handled
|
|
|
|
DbgGetContext();
|
|
|
|
vcContext.SegEs = (ULONG)pFFrame->wES;
|
|
vcContext.SegDs = (ULONG)pFFrame->wDS;
|
|
vcContext.SegCs = (ULONG)pFFrame->wCS;
|
|
vcContext.SegSs = (ULONG)pFFrame->wSS;
|
|
|
|
#ifdef i386
|
|
//
|
|
// On x86 systems, we really might have some data in the high words
|
|
// of these registers. Hopefully DOSX.EXE and KRNL286.EXE don't
|
|
// blow them away. Here is where we attempt to recover them.
|
|
//
|
|
vcContext.Edi = MAKELONG(pFFrame->wDI, HIWORD(px86->Edi ));
|
|
vcContext.Esi = MAKELONG(pFFrame->wSI, HIWORD(px86->Esi ));
|
|
vcContext.Ebx = MAKELONG(pFFrame->wBX, HIWORD(px86->Ebx ));
|
|
vcContext.Edx = MAKELONG(pFFrame->wDX, HIWORD(px86->Edx ));
|
|
vcContext.Ecx = MAKELONG(pFFrame->wCX, HIWORD(px86->Ecx ));
|
|
vcContext.Eax = MAKELONG(pFFrame->wAX, HIWORD(px86->Eax ));
|
|
|
|
vcContext.Ebp = MAKELONG(pFFrame->wBP, HIWORD(px86->Ebp ));
|
|
vcContext.Eip = MAKELONG(pFFrame->wIP, HIWORD(px86->Eip ));
|
|
vcContext.Esp = MAKELONG(pFFrame->wSP, HIWORD(px86->Esp ));
|
|
vcContext.EFlags = MAKELONG(pFFrame->wFlags,HIWORD(px86->EFlags));
|
|
#else
|
|
vcContext.Edi = (ULONG)pFFrame->wDI;
|
|
vcContext.Esi = (ULONG)pFFrame->wSI;
|
|
vcContext.Ebx = (ULONG)pFFrame->wBX;
|
|
vcContext.Edx = (ULONG)pFFrame->wDX;
|
|
vcContext.Ecx = (ULONG)pFFrame->wCX;
|
|
vcContext.Eax = (ULONG)pFFrame->wAX;
|
|
|
|
vcContext.Ebp = (ULONG)pFFrame->wBP;
|
|
vcContext.Eip = (ULONG)pFFrame->wIP;
|
|
vcContext.Esp = (ULONG)pFFrame->wSP;
|
|
vcContext.EFlags = (ULONG)pFFrame->wFlags;
|
|
|
|
#endif
|
|
|
|
if ( fDebugged ) {
|
|
fResult = SendVDMEvent(DBG_GPFAULT2);
|
|
|
|
if ( !fResult ) {
|
|
DWORD dw;
|
|
|
|
dw = SetErrorMode(0);
|
|
try {
|
|
RaiseException((DWORD)DBG_CONTROL_BREAK, 0, 0, (LPDWORD)0);
|
|
fResult = TRUE;
|
|
} except (EXCEPTION_EXECUTE_HANDLER) {
|
|
fResult = FALSE;
|
|
}
|
|
SetErrorMode(dw);
|
|
}
|
|
|
|
} else {
|
|
char text[100];
|
|
|
|
// Dump a simulated context
|
|
|
|
OutputDebugString("NTVDM:GP Fault detected, register dump follows:\n");
|
|
|
|
wsprintf(text,"eax=%08lx ebx=%08lx ecx=%08lx edx=%08lx esi=%08lx edi=%08lx\n",
|
|
vcContext.Eax,
|
|
vcContext.Ebx,
|
|
vcContext.Ecx,
|
|
vcContext.Edx,
|
|
vcContext.Esi,
|
|
vcContext.Edi );
|
|
OutputDebugString(text);
|
|
|
|
wsprintf(text,"eip=%08lx esp=%08lx ebp=%08lx iopl=%d %s %s %s %s %s %s %s %s\n",
|
|
vcContext.Eip,
|
|
vcContext.Esp,
|
|
vcContext.Ebp,
|
|
(vcContext.EFlags & V86FLAGS_IOPL) >> V86FLAGS_IOPL_BITS,
|
|
(vcContext.EFlags & V86FLAGS_OVERFLOW ) ? "ov" : "nv",
|
|
(vcContext.EFlags & V86FLAGS_DIRECTION) ? "dn" : "up",
|
|
(vcContext.EFlags & V86FLAGS_INTERRUPT) ? "ei" : "di",
|
|
(vcContext.EFlags & V86FLAGS_SIGN ) ? "ng" : "pl",
|
|
(vcContext.EFlags & V86FLAGS_ZERO ) ? "zr" : "nz",
|
|
(vcContext.EFlags & V86FLAGS_AUXCARRY ) ? "ac" : "na",
|
|
(vcContext.EFlags & V86FLAGS_PARITY ) ? "po" : "pe",
|
|
(vcContext.EFlags & V86FLAGS_CARRY ) ? "cy" : "nc" );
|
|
OutputDebugString(text);
|
|
|
|
wsprintf(text,"cs=%04x ss=%04x ds=%04x es=%04x fs=%04x gs=%04x efl=%08lx\n",
|
|
(WORD)vcContext.SegCs,
|
|
(WORD)vcContext.SegSs,
|
|
(WORD)vcContext.SegDs,
|
|
(WORD)vcContext.SegEs,
|
|
(WORD)vcContext.SegFs,
|
|
(WORD)vcContext.SegGs,
|
|
vcContext.EFlags );
|
|
OutputDebugString(text);
|
|
}
|
|
|
|
#ifdef i386
|
|
//
|
|
// On x86 systems, we really might have some data in the FS and GS
|
|
// registers. Hopefully DOSX.EXE and KRNL286.EXE don't
|
|
// blow them away. Here is where we attempt to restore them.
|
|
//
|
|
px86->SegGs = (WORD)vcContext.SegGs;
|
|
px86->SegFs = (WORD)vcContext.SegFs;
|
|
#else
|
|
// No need to set FS,GS, they don't exist
|
|
#endif
|
|
|
|
pFFrame->wES = (WORD)vcContext.SegEs;
|
|
pFFrame->wDS = (WORD)vcContext.SegDs;
|
|
pFFrame->wCS = (WORD)vcContext.SegCs;
|
|
pFFrame->wSS = (WORD)vcContext.SegSs;
|
|
|
|
#ifdef i386
|
|
//
|
|
// On x86 systems, we really might have some data in the high words
|
|
// of these registers. Hopefully DOSX.EXE and KRNL286.EXE don't
|
|
// blow them away. Here is where we attempt to restore them.
|
|
//
|
|
pFFrame->wDI = LOWORD(vcContext.Edi);
|
|
px86->Edi = MAKELONG(LOWORD(px86->Edi),HIWORD(vcContext.Edi));
|
|
|
|
pFFrame->wSI = LOWORD(vcContext.Esi);
|
|
px86->Esi = MAKELONG(LOWORD(px86->Esi),HIWORD(vcContext.Esi));
|
|
|
|
pFFrame->wBX = LOWORD(vcContext.Ebx);
|
|
px86->Ebx = MAKELONG(LOWORD(px86->Ebx),HIWORD(vcContext.Ebx));
|
|
|
|
pFFrame->wDX = LOWORD(vcContext.Edx);
|
|
px86->Edx = MAKELONG(LOWORD(px86->Edx),HIWORD(vcContext.Edx));
|
|
|
|
pFFrame->wCX = LOWORD(vcContext.Ecx);
|
|
px86->Ecx = MAKELONG(LOWORD(px86->Ecx),HIWORD(vcContext.Ecx));
|
|
|
|
pFFrame->wAX = LOWORD(vcContext.Eax);
|
|
px86->Eax = MAKELONG(LOWORD(px86->Eax),HIWORD(vcContext.Eax));
|
|
|
|
pFFrame->wBP = LOWORD(vcContext.Ebp);
|
|
px86->Ebp = MAKELONG(LOWORD(px86->Ebp),HIWORD(vcContext.Ebp));
|
|
|
|
pFFrame->wIP = LOWORD(vcContext.Eip);
|
|
px86->Eip = MAKELONG(LOWORD(px86->Eip),HIWORD(vcContext.Eip));
|
|
|
|
pFFrame->wFlags = LOWORD(vcContext.EFlags);
|
|
px86->EFlags = MAKELONG(LOWORD(px86->EFlags),HIWORD(vcContext.EFlags));
|
|
|
|
pFFrame->wSP = LOWORD(vcContext.Esp);
|
|
px86->Esp = MAKELONG(LOWORD(px86->Esp),HIWORD(vcContext.Esp));
|
|
#else
|
|
pFFrame->wDI = (WORD)vcContext.Edi;
|
|
pFFrame->wSI = (WORD)vcContext.Esi;
|
|
pFFrame->wBX = (WORD)vcContext.Ebx;
|
|
pFFrame->wDX = (WORD)vcContext.Edx;
|
|
pFFrame->wCX = (WORD)vcContext.Ecx;
|
|
pFFrame->wAX = (WORD)vcContext.Eax;
|
|
|
|
|
|
pFFrame->wBP = (WORD)vcContext.Ebp;
|
|
pFFrame->wIP = (WORD)vcContext.Eip;
|
|
pFFrame->wFlags = (WORD)vcContext.EFlags;
|
|
pFFrame->wSP = (WORD)vcContext.Esp;
|
|
#endif
|
|
|
|
return( fResult );
|
|
}
|
|
|
|
BOOL DbgDivOverflow2(
|
|
PTFRAME16 pTFrame
|
|
)
|
|
/*
|
|
2nd chance divide exception handler
|
|
*/
|
|
{
|
|
BOOL fResult;
|
|
|
|
fResult = FALSE; // Default to Event not handled
|
|
|
|
if ( fDebugged ) {
|
|
|
|
DbgGetContext();
|
|
|
|
vcContext.SegDs = (ULONG)pTFrame->wDS;
|
|
vcContext.SegCs = (ULONG)pTFrame->wCS;
|
|
vcContext.SegSs = (ULONG)pTFrame->wSS;
|
|
|
|
#ifdef i386
|
|
//
|
|
// On x86 systems, we really might have some data in the high words
|
|
// of these registers. Hopefully DOSX.EXE and KRNL286.EXE don't
|
|
// blow them away. Here is where we attempt to recover them.
|
|
//
|
|
vcContext.Eax = MAKELONG(pTFrame->wAX, HIWORD(px86->Eax ));
|
|
vcContext.Eip = MAKELONG(pTFrame->wIP, HIWORD(px86->Eip ));
|
|
vcContext.Esp = MAKELONG(pTFrame->wSP, HIWORD(px86->Esp ));
|
|
vcContext.EFlags = MAKELONG(pTFrame->wFlags,HIWORD(px86->EFlags));
|
|
#else
|
|
vcContext.Eax = (ULONG)pTFrame->wAX;
|
|
|
|
vcContext.Eip = (ULONG)pTFrame->wIP;
|
|
vcContext.Esp = (ULONG)pTFrame->wSP;
|
|
vcContext.EFlags = (ULONG)pTFrame->wFlags;
|
|
|
|
#endif
|
|
|
|
fResult = SendVDMEvent(DBG_DIVOVERFLOW);
|
|
|
|
#ifdef i386
|
|
//
|
|
// On x86 systems, we really might have some data in the FS and GS
|
|
// registers. Hopefully DOSX.EXE and KRNL286.EXE don't
|
|
// blow them away. Here is where we attempt to restore them.
|
|
//
|
|
px86->SegGs = vcContext.SegGs;
|
|
px86->SegFs = vcContext.SegFs;
|
|
#else
|
|
// No need to set FS,GS, they don't exist
|
|
#endif
|
|
|
|
setES( (WORD)vcContext.SegEs );
|
|
pTFrame->wDS = (WORD)vcContext.SegDs;
|
|
pTFrame->wCS = (WORD)vcContext.SegCs;
|
|
pTFrame->wSS = (WORD)vcContext.SegSs;
|
|
|
|
#ifdef i386
|
|
//
|
|
// On x86 systems, we really might have some data in the high words
|
|
// of these registers. Hopefully DOSX.EXE and KRNL286.EXE don't
|
|
// blow them away. Here is where we attempt to restore them.
|
|
//
|
|
setEDI( vcContext.Edi );
|
|
setESI( vcContext.Esi );
|
|
setEBX( vcContext.Ebx );
|
|
setEDX( vcContext.Edx );
|
|
setECX( vcContext.Ecx );
|
|
|
|
pTFrame->wAX = LOWORD(vcContext.Eax);
|
|
px86->Eax = MAKELONG(LOWORD(px86->Eax),HIWORD(vcContext.Eax));
|
|
|
|
setEBP( vcContext.Ebp );
|
|
|
|
pTFrame->wIP = LOWORD(vcContext.Eip);
|
|
px86->Eip = MAKELONG(LOWORD(px86->Eip),HIWORD(vcContext.Eip));
|
|
|
|
pTFrame->wFlags = LOWORD(vcContext.EFlags);
|
|
px86->EFlags = MAKELONG(LOWORD(px86->EFlags),HIWORD(vcContext.EFlags));
|
|
|
|
pTFrame->wSP = LOWORD(vcContext.Esp);
|
|
px86->Esp = MAKELONG(LOWORD(px86->Esp),HIWORD(vcContext.Esp));
|
|
#else
|
|
setDI( (WORD)vcContext.Edi );
|
|
setSI( (WORD)vcContext.Esi );
|
|
setBX( (WORD)vcContext.Ebx );
|
|
setDX( (WORD)vcContext.Edx );
|
|
setCX( (WORD)vcContext.Ecx );
|
|
pTFrame->wAX = (WORD)vcContext.Eax;
|
|
|
|
|
|
setBP( (WORD)vcContext.Ebp );
|
|
pTFrame->wIP = (WORD)vcContext.Eip;
|
|
pTFrame->wFlags = (WORD)vcContext.EFlags;
|
|
pTFrame->wSP = (WORD)vcContext.Esp;
|
|
#endif
|
|
|
|
|
|
}
|
|
|
|
return( fResult );
|
|
}
|
|
|
|
|
|
|
|
BOOL
|
|
xxxDbgFault(
|
|
ULONG IntNumber
|
|
)
|
|
/*
|
|
This is the first chance exception handler. It is called by dpmi32
|
|
*/
|
|
|
|
{
|
|
ULONG vdmEip;
|
|
int i;
|
|
PBYTE lpInst;
|
|
BOOL fResult = FALSE;
|
|
|
|
|
|
if ( fDebugged ) {
|
|
|
|
switch(IntNumber) {
|
|
case 6:
|
|
//BUGBUG: We *could* handle these, but people might be confused by
|
|
// the fact that krnl386 does an intentional opcode exception.
|
|
// GetNormalContext( &vcContext, &viInfo, EventParams, DBG_INSTRFAULT, PX86 );
|
|
break;
|
|
|
|
case 12:
|
|
if (*(ULONG *)(IntelMemoryBase+FIXED_NTVDMSTATE_LINEAR) & VDM_BREAK_EXCEPTIONS) {
|
|
DbgGetContext();
|
|
fResult = SendVDMEvent(DBG_STACKFAULT);
|
|
}
|
|
break;
|
|
|
|
case 13:
|
|
if (*(ULONG *)(IntelMemoryBase+FIXED_NTVDMSTATE_LINEAR) & VDM_BREAK_EXCEPTIONS) {
|
|
DbgGetContext();
|
|
fResult = SendVDMEvent(DBG_GPFAULT);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
return fResult;
|
|
|
|
}
|
|
|
|
|