@Override
public void emitUnwind(Value exception) {
ForeignCallLinkage linkage =
getForeignCalls().lookupForeignCall(HotSpotBackend.UNWIND_EXCEPTION_TO_CALLER);
CallingConvention outgoingCc = linkage.getOutgoingCallingConvention();
assert outgoingCc.getArgumentCount() == 2;
RegisterValue exceptionParameter = (RegisterValue) outgoingCc.getArgument(0);
emitMove(exceptionParameter, exception);
append(new AArch64HotSpotUnwindOp(config, exceptionParameter));
}
@Override
public Variable emitForeignCall(ForeignCallLinkage linkage, LIRFrameState state, Value... args) {
HotSpotForeignCallLinkage hotspotLinkage = (HotSpotForeignCallLinkage) linkage;
Variable result;
LIRFrameState debugInfo = null;
if (hotspotLinkage.needsDebugInfo()) {
debugInfo = state;
assert debugInfo != null || getStub() != null;
}
if (linkage.destroysRegisters() || hotspotLinkage.needsJavaFrameAnchor()) {
HotSpotRegistersProvider registers = getProviders().getRegisters();
Register thread = registers.getThreadRegister();
Variable scratch = newVariable(LIRKind.value(target().arch.getWordKind()));
// We need a label for the return address.
label = new Label();
append(
new AArch64HotSpotCRuntimeCallPrologueOp(
config.threadLastJavaSpOffset(),
config.threadLastJavaPcOffset(),
config.threadLastJavaFpOffset(),
thread,
scratch,
label));
result = super.emitForeignCall(hotspotLinkage, debugInfo, args);
append(
new AArch64HotSpotCRuntimeCallEpilogueOp(
config.threadLastJavaSpOffset(), config.threadLastJavaFpOffset(), thread));
// Clear it out so it's not being reused later.
label = null;
} else {
result = super.emitForeignCall(hotspotLinkage, debugInfo, args);
}
return result;
}