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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 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.amd64;
import static jdk.vm.ci.amd64.AMD64.rax;
import static jdk.vm.ci.amd64.AMD64.rbx;
import static jdk.vm.ci.amd64.AMD64.rip;
import jdk.tools.jaotc.CompiledMethodInfo.StubInformation;
import jdk.tools.jaotc.ELFMacroAssembler;
import org.graalvm.compiler.asm.amd64.AMD64Address;
import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler;
import jdk.vm.ci.code.TargetDescription;
public final class AMD64ELFMacroAssembler extends AMD64MacroAssembler implements ELFMacroAssembler {
private int currentEndOfInstruction;
public AMD64ELFMacroAssembler(TargetDescription target) {
super(target);
}
@Override
public int currentEndOfInstruction() {
return currentEndOfInstruction;
}
@Override
public byte[] getPLTJumpCode() {
// The main dispatch instruction
// jmpq *0x00000000(%rip)
jmp(new AMD64Address(rip, 0));
currentEndOfInstruction = position();
// Align to 8 bytes
align(8);
return close(true);
}
@Override
public byte[] getPLTStaticEntryCode(StubInformation stub) {
// The main dispatch instruction
// jmpq *0x00000000(%rip)
jmp(new AMD64Address(rip, 0));
stub.setDispatchJumpOffset(position());
// C2I stub used to call interpreter.
// mov 0x00000000(%rip),%rbx Loading Method*
movq(rbx, new AMD64Address(rip, 0));
stub.setMovOffset(position());
// jmpq *0x00000000(%rip) [c2i addr]
jmp(new AMD64Address(rip, 0));
stub.setC2IJumpOffset(position());
// Call to VM runtime to resolve the call.
// jmpq *0x00000000(%rip)
stub.setResolveJumpStart(position());
jmp(new AMD64Address(rip, 0));
stub.setResolveJumpOffset(position());
currentEndOfInstruction = position();
// Align to 8 bytes
align(8);
stub.setSize(position());
return close(true);
}
@Override
public byte[] getPLTVirtualEntryCode(StubInformation stub) {
// Klass loading instruction
// mov 0x00000000(%rip),%rax
movq(rax, new AMD64Address(rip, 0));
stub.setMovOffset(position());
// The main dispatch instruction
// jmpq *0x00000000(%rip)
jmp(new AMD64Address(rip, 0));
stub.setDispatchJumpOffset(position());
// Call to VM runtime to resolve the call.
// jmpq *0x00000000(%rip)
stub.setResolveJumpStart(position());
jmp(new AMD64Address(rip, 0));
stub.setResolveJumpOffset(position());
currentEndOfInstruction = position();
// Align to 8 bytes
align(8);
stub.setSize(position());
return close(true);
}
}