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Fix read of FPC register #4477

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merged 1 commit into from
Jan 28, 2019
Merged

Fix read of FPC register #4477

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10 changes: 4 additions & 6 deletions runtime/compiler/runtime/SignalHandler.c
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/*******************************************************************************
* Copyright (c) 2000, 2018 IBM Corp. and others
* Copyright (c) 2000, 2019 IBM Corp. and others
*
* This program and the accompanying materials are made available under
* the terms of the Eclipse Public License 2.0 which accompanies this
Expand Down Expand Up @@ -920,7 +920,6 @@ UDATA jit390Handler(J9VMThread* vmThread, U_32 sigType, void* sigInfo)
const char* infoName;
UDATA *controlPC;
UDATA controlPCValue;
UDATA *controlFPC;
UDATA *entryPointRegister;
U_8 DXC;
U_8 ILC;
Expand All @@ -941,13 +940,12 @@ UDATA jit390Handler(J9VMThread* vmThread, U_32 sigType, void* sigInfo)
controlPCValue = *controlPC;

infoType = j9sig_info(sigInfo, J9PORT_SIG_CONTROL, J9PORT_SIG_CONTROL_S390_FPC, &infoName, &infoValue);
if (infoType != J9PORT_SIG_VALUE_ADDRESS)
if (infoType != J9PORT_SIG_VALUE_32)
return J9PORT_SIG_EXCEPTION_CONTINUE_SEARCH;

controlFPC = (UDATA *) infoValue;
DXC = *(U_8 *)(((U_8 *)controlFPC)+2);
DXC = *(U_8 *)(((U_8 *)infoValue) + 2);

if (J9PORT_SIG_FLAG_SIGFPE == sigType && DXC == (U_8)0xFF)
if (J9PORT_SIG_FLAG_SIGFPE == sigType && DXC == (U_8)0xFF)
{
trapType = jit390IdentifyCodeCacheTrapType(vmThread, (U_8 *) controlPCValue, &ILC, sigInfo);
controlPCValue = controlPCValue - ILC;
Expand Down