|
|
//++////extern "C"//VOID//_GetNextInstrOffset (// PVOID* ppReturnPoint// );
////Routine Description://// This function scans the scope tables associated with the specified// procedure and calls exception and termination handlers as necessary.////Arguments://// ppReturnPoint (r32) - store b0 in *pReturnPoint////Return Value://// None////--
.global _GetNextInstrOffset#
.proc _GetNextInstrOffset#
.align 32_GetNextInstrOffset: alloc r2=1, 0, 0, 0 mov r3 = b0;;
st8 [r32]=r3 br.ret.sptk.few b0 .endp _GetNextInstrOffset#
//++////extern "C"//PVOID//__Cxx_ExecuteHandler (// ULONGLONG MemoryStack,// ULONGLONG BackingStore,// ULONGLONG Handler,// ULONGLONG GlobalPointer// );
////Routine Description://// This function scans the scope tables associated with the specified// procedure and calls exception and termination handlers as necessary.////Arguments://// MemoryStack (r32) - memory stack pointer of establisher frame//// BackingStore (r33) - backing store pointer of establisher frame//// Handler (r34) - Entry point of handler//// GlobalPointer (r35) - GP of termination handler////Return Value://// Returns the continuation point////--
.global __Cxx_ExecuteHandler#
.proc __Cxx_ExecuteHandler#
.align 32__Cxx_ExecuteHandler: mov gp = r35 // set new GP mov b6 = r34 // handler address br b6 // branch to handler .endp __Cxx_ExecuteHandler#
//++////extern "C" void* _CallSettingFrame(// void* handler,// EHRegistrationNode *pEstablisher,// ULONG NLG_CODE)////--.global _NLG_Notify.type _NLG_Notify, @function.global _GetTargetGP.type _GetTargetGP, @function.global _GetImageBase.type _GetImageBase, @function.global _SetImageBase.type _SetImageBase, @function.global _CallSettingFrame.global __NLG_Return
.proc _CallSettingFrame .align 32 .prologue_CallSettingFrame: .save ar.pfs,r35 alloc loc0 = ar.pfs, 3, 8, 4, 0 .save rp,loc1 mov loc1 = b0 // save important stuff .save pr,loc2 mov loc2 = pr mov loc3 = gp .body ld8 loc5 = [in1],0x8 // pEstablisher->MemoryStackBP ;;
ld8 loc6 = [in1] // pEstablisher->BackingStoreBP mov out0 = in0 // pass the target address br.call.sptk b0 = _GetTargetGP // Get target's GP ;;
mov loc4 = ret0 br.call.sptk b0 = _GetImageBase //Get current image base ;;
mov loc7 = ret0 // save current image base mov out0 = in0 // handler address mov out1 = loc5 // pEstablisher->MemoryStackBP mov out2 = loc6 // pEstablisher->BackingStoreBP mov out3 = in2 // NLG_CODE br.call.sptk b0 = _NLG_Notify // Notify debugger about transferring control to the handler ;;
mov gp = loc4 // set hanlder's GP mov out0 = loc5 // pEstablisher->MemoryStackBP mov out1 = loc6 // pEstablisher->BackingStoreBP mov b6 = in0 // hanlder address br.call.sptk b0 = b6 // call the handler (pEstablisher->MemoryStackBP, pEstablisher->BackingStoreBP) ;;
__NLG_Return: mov gp = loc3 // restore gp cmp.eq p14,p5 = ret0, r0 // did the handler return a continuation address? ;;
(p14) mov loc3 = 0 // if it didn'just return 0(p5) mov loc3 = ret0 // if it did then it was image base relative for 2.5, so fix it up mov out0 = loc7 // Restore image base in TLS, the handler could call an other dll with different image base br.call.sptk b0 = _SetImageBase ;;
(p5) add loc3 = loc7, loc3 // ImageBase + handler's return for 2.5 ;;
mov loc4 = 0x100 // NLG_CATCH_ENTER ;;
cmp.eq p14,p15 = loc4, in2 // if NLG_CODE == NLG_CATCH_ENTER notify debugger again about continuing mainstream ;;
mov out3 = 0x2 // NLG_CATCH_LEAVE mov out1 = loc5 // pEstablisher->MemoryStackBP mov out2 = loc6 // pEstablisher->BackingStoreBP mov out0 = loc3 // handler continuation address(p14) br.call.sptk b0 = _NLG_Notify ;;
mov ret0 = loc3 mov b0 = loc1 // restore stuff mov pr = loc2 mov ar.pfs = loc0 br.ret.sptk b0.endp _CallSettingFrame
|
