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101 lines
2.9 KiB
101 lines
2.9 KiB
//
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// Created by TiborL 06/01/97
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//
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#include "windows.h"
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#include "ehassert.h"
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#include "ehdata.h" // Declarations of all types used for EH
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#include "ehstate.h"
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#include "eh.h"
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#include "ehhooks.h"
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#include "trnsctrl.h"
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#pragma hdrstop
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__ehstate_t __StateFromIp(
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FuncInfo *pFuncInfo,
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DispatcherContext *pDC,
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__int64 Ip
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) {
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unsigned int index; // loop control variable
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unsigned int nIPMapEntry; // # of IpMapEntry; must be > 0
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DASSERT(pFuncInfo != NULL);
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nIPMapEntry = FUNC_NIPMAPENT(*pFuncInfo);
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DASSERT(FUNC_IPMAP(*pFuncInfo, pDC->ImageBase) != NULL);
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for (index = 0; index < nIPMapEntry; index++) {
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IptoStateMapEntry *pIPtoStateMap = FUNC_PIPTOSTATE(*pFuncInfo, index, pDC->ImageBase);
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if( Ip < (pDC->ImageBase + pIPtoStateMap->Ip) ) {
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break;
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}
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}
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if (index == 0) {
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// We are at the first entry, could be an error
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return EH_EMPTY_STATE;
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}
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// We over-shot one iteration; return state from the previous slot
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return FUNC_IPTOSTATE(*pFuncInfo, index - 1, pDC->ImageBase).State;
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}
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__ehstate_t __StateFromControlPc(
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FuncInfo *pFuncInfo,
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DispatcherContext *pDC
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) {
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return __StateFromIp(pFuncInfo, pDC, pDC->ControlPc);
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}
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//
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// This routine is a replacement for the corresponding macro in 'ehdata.h'
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//
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__ehstate_t __GetCurrentState(
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EHRegistrationNode *pFrame,
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DispatcherContext *pDC,
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FuncInfo *pFuncInfo
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) {
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if( UNWINDSTATE(pFrame->MemoryStackFp, FUNC_DISPUNWINDHELP(*pFuncInfo)) == -2 ) {
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return __StateFromControlPc(pFuncInfo, pDC);
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}
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else {
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return UNWINDSTATE(pFrame->MemoryStackFp, FUNC_DISPUNWINDHELP(*pFuncInfo));
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}
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}
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VOID __SetState(
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EHRegistrationNode *pRN,
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DispatcherContext *pDC,
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FuncInfo *pFuncInfo,
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__ehstate_t newState
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){
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UNWINDSTATE(pRN->MemoryStackFp, FUNC_DISPUNWINDHELP(*pFuncInfo)) = newState;
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}
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VOID __SetUnwindTryBlock(
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EHRegistrationNode *pRN,
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DispatcherContext *pDC,
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FuncInfo *pFuncInfo,
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INT curState
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){
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EHRegistrationNode EstablisherFramePointers;
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_GetEstablisherFrame(pRN, pDC, pFuncInfo, &EstablisherFramePointers);
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if( curState > UNWINDTRYBLOCK(EstablisherFramePointers.MemoryStackFp, FUNC_DISPUNWINDHELP(*pFuncInfo)) ) {
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UNWINDTRYBLOCK(EstablisherFramePointers.MemoryStackFp, FUNC_DISPUNWINDHELP(*pFuncInfo)) = curState;
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}
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}
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INT __GetUnwindTryBlock(
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EHRegistrationNode *pRN,
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DispatcherContext *pDC,
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FuncInfo *pFuncInfo
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){
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EHRegistrationNode EstablisherFramePointers;
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_GetEstablisherFrame(pRN, pDC, pFuncInfo, &EstablisherFramePointers);
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return UNWINDTRYBLOCK(EstablisherFramePointers.MemoryStackFp, FUNC_DISPUNWINDHELP(*pFuncInfo));
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}
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