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* version 2 for more details (a copy is included in the LICENSE file that
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package jdk.tools.jaotc;
import jdk.tools.jaotc.binformat.BinaryContainer;
import jdk.tools.jaotc.binformat.Relocation.RelocType;
import org.graalvm.compiler.hotspot.HotSpotForeignCallLinkage;
import jdk.vm.ci.code.site.Call;
This is a foreign call site. This means either a call to the VM or a call to a Graal stub. If
it's a call directly to the VM, mangle the name. The call should go through regular .plt used by
the system loader, at least for now. If it's a call to a Graal stub, it should always be a direct
call, since the Graal stubs are contained within the .so file.
/**
* This is a foreign call site. This means either a call to the VM or a call to a Graal stub. If
* it's a call directly to the VM, mangle the name. The call should go through regular .plt used by
* the system loader, at least for now. If it's a call to a Graal stub, it should always be a direct
* call, since the Graal stubs are contained within the .so file.
*/
final class ForeignCallSiteRelocationInfo extends CallSiteRelocationInfo {
ForeignCallSiteRelocationInfo(Call call, HotSpotForeignCallLinkage callTarget, DataBuilder dataBuilder) {
super(getTargetSymbol(call, callTarget, dataBuilder), getRelocType(callTarget));
}
private static String getTargetSymbol(Call call, HotSpotForeignCallLinkage callTarget, DataBuilder dataBuilder) {
// If it specifies a foreign call linkage, find the symbol corresponding to the address in
// HotSpotVMConfig's fields.
final long foreignCallTargetAddress = callTarget.getAddress();
// Get the C/C++ function name associated with the foreign call target address.
String functionName = dataBuilder.getVMFunctionNameForAddress(foreignCallTargetAddress);
if (functionName != null) {
// Use the known global AOT symbol associated with function name, if one exists
BinaryContainer binaryContainer = dataBuilder.getBinaryContainer();
String aotSymbol = binaryContainer.getAOTSymbolForVMFunctionName(functionName);
if (aotSymbol == null) {
throw new InternalError("no global symbol found for: " + functionName);
}
return aotSymbol;
}
// Is it a Graal stub we are calling?
if (callTarget.isCompiledStub()) {
assert call.direct : "Should always be a direct call to stubs";
return callTarget.getSymbol();
}
throw new InternalError("no symbol found for: " + callTarget);
}
private static RelocType getRelocType(HotSpotForeignCallLinkage callTarget) {
return callTarget.isCompiledStub() ? RelocType.STUB_CALL_DIRECT : RelocType.FOREIGN_CALL_INDIRECT_GOT;
}
}