1 /* 2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2015, Red Hat Inc. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 package sun.jvm.hotspot.debugger.linux.aarch64; 27 28 import sun.jvm.hotspot.debugger.*; 29 import sun.jvm.hotspot.debugger.aarch64.*; 30 import sun.jvm.hotspot.debugger.linux.*; 31 import sun.jvm.hotspot.debugger.cdbg.*; 32 import sun.jvm.hotspot.debugger.cdbg.basic.*; 33 34 final public class LinuxAARCH64CFrame extends BasicCFrame { 35 public LinuxAARCH64CFrame(LinuxDebugger dbg, Address fp, Address pc) { 36 super(dbg.getCDebugger()); 37 this.fp = fp; 38 this.pc = pc; 39 this.dbg = dbg; 40 } 41 42 // override base class impl to avoid ELF parsing 43 public ClosestSymbol closestSymbolToPC() { 44 // try native lookup in debugger. 45 return dbg.lookup(dbg.getAddressValue(pc())); 46 } 47 48 public Address pc() { 49 return pc; 50 } 51 52 public Address localVariableBase() { 53 return fp; 54 } 55 56 public CFrame sender(ThreadProxy thread) { 57 AARCH64ThreadContext context = (AARCH64ThreadContext) thread.getContext(); 58 Address rsp = context.getRegisterAsAddress(AARCH64ThreadContext.SP); 59 60 if ( (fp == null) || fp.lessThan(rsp) ) { 61 return null; 62 } 63 64 // Check alignment of fp 65 if ( dbg.getAddressValue(fp) % 2 * ADDRESS_SIZE != 0) { 66 return null; 67 } 68 69 Address nextFP = fp.getAddressAt( 0 * ADDRESS_SIZE); 70 if (nextFP == null || nextFP.lessThanOrEqual(rsp)) { 71 return null; 72 } 73 Address nextPC = fp.getAddressAt( 1 * ADDRESS_SIZE); 74 if (nextPC == null) { 75 return null; 76 } 77 return new LinuxAARCH64CFrame(dbg, nextFP, nextPC); 78 } 79 80 // package/class internals only 81 private static final int ADDRESS_SIZE = 8; 82 private Address pc; 83 private Address sp; 84 private Address fp; 85 private LinuxDebugger dbg; 86 }