int _except_handler3(PEXCEPTION_RECORD rec, MSVCRT_EXCEPTION_FRAME* frame, PCONTEXT context, void *dispatcher) {
long retval;
int trylevel;
EXCEPTION_POINTERS exceptPtrs;
PSCOPETABLE pScopeTable;
//syslog(LOG_DEBUG, "msvcrt: exception %lx flags=%lx at %p handler=%p %p %p semi-stub",
// rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
// frame->handler, context, dispatcher);
__asm cld;
if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)) {
// Unwinding the current frame
_local_unwind2(frame, TRYLEVEL_END);
return ExceptionContinueSearch;
} else {
// Hunting for handler
exceptPtrs.ExceptionRecord = rec;
exceptPtrs.ContextRecord = context;
*((DWORD *) frame - 1) = (DWORD) &exceptPtrs;
trylevel = frame->trylevel;
pScopeTable = frame->scopetable;
while (trylevel != TRYLEVEL_END) {
if (pScopeTable[trylevel].lpfnFilter) {
//syslog(LOG_DEBUG, "filter = %p", pScopeTable[trylevel].lpfnFilter);
retval = call_filter(pScopeTable[trylevel].lpfnFilter, &exceptPtrs, &frame->_ebp);
//syslog(LOG_DEBUG, "filter returned %s", retval == EXCEPTION_CONTINUE_EXECUTION ?
// "CONTINUE_EXECUTION" : retval == EXCEPTION_EXECUTE_HANDLER ?
// "EXECUTE_HANDLER" : "CONTINUE_SEARCH");
if (retval == EXCEPTION_CONTINUE_EXECUTION) return ExceptionContinueExecution;
if (retval == EXCEPTION_EXECUTE_HANDLER) {
// Unwind all higher frames, this one will handle the exception
_global_unwind2((PEXCEPTION_FRAME) frame);
_local_unwind2(frame, trylevel);
// Set our trylevel to the enclosing block, and call the __finally code, which won't return
frame->trylevel = pScopeTable->previousTryLevel;
//syslog(LOG_DEBUG, "__finally block %p",pScopeTable[trylevel].lpfnHandler);
call_finally_block(pScopeTable[trylevel].lpfnHandler, &frame->_ebp);
panic("Returned from __finally block");
}
}
trylevel = pScopeTable->previousTryLevel;
}
}
return ExceptionContinueSearch;
}
void __stdcall _seh_longjmp_unwind(_JUMP_BUFFER *jmp)
{
_local_unwind2((MSVCRT_EXCEPTION_FRAME*) jmp->Registration, jmp->TryLevel);
}