| /* |
| * Copyright (c) 2001, 2004, Oracle and/or its affiliates. All rights reserved. |
| * 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. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| package sun.jvm.hotspot.debugger.posix; |
| |
| import java.io.*; |
| import sun.jvm.hotspot.debugger.*; |
| import sun.jvm.hotspot.debugger.posix.elf.*; |
| |
| class AddressDataSource implements DataSource { |
| AddressDataSource(Address addr) { |
| this.addr = addr; |
| offset = 0; |
| } |
| |
| public byte readByte() throws IOException { |
| try { |
| byte res = (byte) addr.getCIntegerAt(offset, 1, false); |
| ++offset; |
| return res; |
| } catch (UnmappedAddressException e) { |
| throw (IOException) new IOException("Unmapped address at 0x" |
| + Long.toHexString(e.getAddress())).initCause(e); |
| } catch (DebuggerException e) { |
| throw (IOException) new IOException().initCause(e); |
| } |
| } |
| |
| public short readShort() throws IOException { |
| // NOTE: byte swapping is taken care of at the ELFFileImpl level |
| int b1 = readByte() & 0xFF; |
| int b2 = readByte() & 0xFF; |
| return (short) ((b1 << 8) | b2); |
| } |
| |
| public int readInt() throws IOException { |
| // NOTE: byte swapping is taken care of at the ELFFileImpl level |
| int b1 = ((int) readByte()) & 0xFF; |
| int b2 = ((int) readByte()) & 0xFF; |
| int b3 = ((int) readByte()) & 0xFF; |
| int b4 = ((int) readByte()) & 0xFF; |
| return ((b1 << 24) | (b2 << 16) | (b3 << 8) | b4); |
| } |
| |
| public long readLong() throws IOException { |
| // NOTE: byte swapping is taken care of at the ELFFileImpl level |
| long b1 = ((long) readByte()) & 0xFFL; |
| long b2 = ((long) readByte()) & 0xFFL; |
| long b3 = ((long) readByte()) & 0xFFL; |
| long b4 = ((long) readByte()) & 0xFFL; |
| long b5 = ((long) readByte()) & 0xFFL; |
| long b6 = ((long) readByte()) & 0xFFL; |
| long b7 = ((long) readByte()) & 0xFFL; |
| long b8 = ((long) readByte()) & 0xFFL; |
| return (((((b1 << 24) | (b2 << 16) | (b3 << 8) | b4)) << 32) | |
| ((((b5 << 24) | (b6 << 16) | (b7 << 8) | b8)))); |
| } |
| |
| public int read(byte[] b) throws IOException { |
| for (int i = 0; i < b.length; i++) { |
| b[i] = readByte(); |
| } |
| return b.length; |
| } |
| |
| public void seek(long pos) throws IOException { |
| offset = pos; |
| } |
| |
| public long getFilePointer() throws IOException { |
| return offset; |
| } |
| |
| public void close() throws IOException { |
| } |
| |
| private Address addr; |
| private long offset; |
| } |