1/*
2 * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24package jdk.tools.jaotc.amd64;
25
26import static jdk.vm.ci.amd64.AMD64.rax;
27import static jdk.vm.ci.amd64.AMD64.rbx;
28import static jdk.vm.ci.amd64.AMD64.rip;
29
30import jdk.tools.jaotc.StubInformation;
31import jdk.tools.jaotc.ELFMacroAssembler;
32import org.graalvm.compiler.asm.amd64.AMD64Address;
33import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler;
34
35import jdk.vm.ci.code.TargetDescription;
36
37public final class AMD64ELFMacroAssembler extends AMD64MacroAssembler implements ELFMacroAssembler {
38
39    private int currentEndOfInstruction;
40
41    public AMD64ELFMacroAssembler(TargetDescription target) {
42        super(target);
43    }
44
45    @Override
46    public int currentEndOfInstruction() {
47        return currentEndOfInstruction;
48    }
49
50    @Override
51    public byte[] getPLTJumpCode() {
52        // The main dispatch instruction
53        // jmpq *0x00000000(%rip)
54        jmp(new AMD64Address(rip, 0));
55        currentEndOfInstruction = position();
56
57        // Align to 8 bytes
58        align(8);
59
60        return close(true);
61    }
62
63    @Override
64    public byte[] getPLTStaticEntryCode(StubInformation stub) {
65        // The main dispatch instruction
66        // jmpq *0x00000000(%rip)
67        jmp(new AMD64Address(rip, 0));
68        stub.setDispatchJumpOffset(position());
69
70        // C2I stub used to call interpreter.
71        // mov 0x00000000(%rip),%rbx Loading Method*
72        movq(rbx, new AMD64Address(rip, 0));
73        stub.setMovOffset(position());
74
75        // jmpq *0x00000000(%rip) [c2i addr]
76        jmp(new AMD64Address(rip, 0));
77        stub.setC2IJumpOffset(position());
78
79        // Call to VM runtime to resolve the call.
80        // jmpq *0x00000000(%rip)
81        stub.setResolveJumpStart(position());
82        jmp(new AMD64Address(rip, 0));
83        stub.setResolveJumpOffset(position());
84        currentEndOfInstruction = position();
85
86        // Align to 8 bytes
87        align(8);
88        stub.setSize(position());
89
90        return close(true);
91    }
92
93    @Override
94    public byte[] getPLTVirtualEntryCode(StubInformation stub) {
95        // Klass loading instruction
96        // mov 0x00000000(%rip),%rax
97        movq(rax, new AMD64Address(rip, 0));
98        stub.setMovOffset(position());
99
100        // The main dispatch instruction
101        // jmpq *0x00000000(%rip)
102        jmp(new AMD64Address(rip, 0));
103        stub.setDispatchJumpOffset(position());
104
105        // Call to VM runtime to resolve the call.
106        // jmpq *0x00000000(%rip)
107        stub.setResolveJumpStart(position());
108        jmp(new AMD64Address(rip, 0));
109        stub.setResolveJumpOffset(position());
110        currentEndOfInstruction = position();
111
112        // Align to 8 bytes
113        align(8);
114        stub.setSize(position());
115
116        return close(true);
117    }
118
119}
120