1 /* 2 * Copyright (c) 2016, 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 24 package jdk.tools.jaotc.aarch64; 25 26 import jdk.tools.jaotc.StubInformation; 27 import jdk.tools.jaotc.ELFMacroAssembler; 28 29 import org.graalvm.compiler.asm.aarch64.AArch64Address; 30 import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler; 31 32 33 import jdk.vm.ci.code.TargetDescription; 34 import jdk.vm.ci.code.Register; 35 36 import static jdk.vm.ci.aarch64.AArch64.*; 37 38 public final class AArch64ELFMacroAssembler extends AArch64MacroAssembler implements ELFMacroAssembler { 39 40 private int currentEndOfInstruction; 41 42 public AArch64ELFMacroAssembler(TargetDescription target) { 43 super(target); 44 } 45 46 @Override 47 public int currentEndOfInstruction() { 48 return currentEndOfInstruction; 49 } 50 51 @Override 52 public byte[] getPLTJumpCode() { 53 // The main dispatch instruction 54 addressOf(r16); 55 ldr(64, r16, AArch64Address.createBaseRegisterOnlyAddress(r16)); 56 jmp(r16); 57 58 currentEndOfInstruction = position(); 59 60 align(8); 61 62 return close(true); 63 } 64 65 @Override 66 public byte[] getPLTStaticEntryCode(StubInformation stub) { 67 // The main dispatch instruction 68 addressOf(r16); 69 ldr(64, r16, AArch64Address.createBaseRegisterOnlyAddress(r16)); 70 jmp(r16); 71 stub.setDispatchJumpOffset(position()); 72 73 // C2I stub used to call interpreter. First load r12 74 // (i.e. rmethod) with a pointer to the Method structure ... 75 addressOf(r12); 76 ldr(64, r12, AArch64Address.createBaseRegisterOnlyAddress(r12)); 77 nop(); 78 stub.setMovOffset(position()); 79 80 // ... then jump to the interpreter. 81 addressOf(r16); 82 ldr(64, r16, AArch64Address.createBaseRegisterOnlyAddress(r16)); 83 jmp(r16); 84 stub.setC2IJumpOffset(position()); 85 86 // Call to VM runtime to resolve the call. 87 stub.setResolveJumpStart(position()); 88 addressOf(r16); 89 ldr(64, r16, AArch64Address.createBaseRegisterOnlyAddress(r16)); 90 jmp(r16); 91 stub.setResolveJumpOffset(position()); 92 currentEndOfInstruction = position(); 93 94 align(8); 95 stub.setSize(position()); 96 97 return close(true); 98 } 99 100 @Override 101 public byte[] getPLTVirtualEntryCode(StubInformation stub) { 102 // Fixup an inline cache. 103 // Load r9 with a pointer to the Klass. 104 addressOf(r17); 105 ldr(64, r9, AArch64Address.createBaseRegisterOnlyAddress(r17)); 106 nop(); 107 stub.setMovOffset(position()); 108 109 // Jump to the method. 110 addressOf(r16); 111 ldr(64, r16, AArch64Address.createBaseRegisterOnlyAddress(r16)); 112 jmp(r16); 113 stub.setDispatchJumpOffset(position()); 114 115 // Call to VM runtime to resolve the call. 116 stub.setResolveJumpStart(position()); 117 addressOf(r16); 118 ldr(64, r16, AArch64Address.createBaseRegisterOnlyAddress(r16)); 119 jmp(r16); 120 stub.setResolveJumpOffset(position()); 121 currentEndOfInstruction = position(); 122 123 align(8); 124 stub.setSize(position()); 125 126 return close(true); 127 } 128 }