1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
/*******************************************************************************
* Copyright (c) 2000, 2008 QNX Software Systems and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* QNX Software Systems - Initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.utils.coff;
import java.io.IOException;
import java.io.RandomAccessFile;
import org.eclipse.cdt.core.CCorePlugin;
public class Exe {
public static final String NL = System.getProperty("line.separator", "\n"); //$NON-NLS-1$ //$NON-NLS-2$
protected RandomAccessFile rfile;
ExeHeader ehdr;
static public class ExeHeader {
public final static int EXEHDRSZ = 28;
public byte[] e_signature = new byte[2]; // 00-01 "MZ" - Link file .EXE signature
public short e_lastsize; // 02-03 Length of EXE file modulo 512
public short e_nblocks; // 04-05 Number of 512 pages (including the last page)
public short e_nreloc; // 06-07 Number of relocation entries
public short e_hdrsize; // 08-09 Size of header in 16 byte paragraphs,
// occupied by "EXE" header and relo table.
public short e_minalloc; // 0A-0B Minimum paragraphs of memory allocated
public short e_maxalloc; // 0C-0D Maximum number of paragraphs allocated
// in addition to the code size
public short e_ss; // 0E-0F Initial SS relative to start of executable
public short e_sp; // 10-11 Initial SP
public short e_checksum; // 12-13 Checksum (or 0) of executable
public short e_ip; // 14-15 CS:IP relative to start of executable
public short e_cs; // 16-17 CS:IP relative to start of executable
public short e_relocoffs; // 18-19 Offset of relocation table;
// 40h for new-(NE,LE,LX,W3,PE etc.) executable
public short e_noverlay; // 1A-1B Overlay number (0h = main program)
protected ExeHeader(RandomAccessFile file) throws IOException {
this(file, file.getFilePointer());
}
protected ExeHeader(RandomAccessFile file, long offset) throws IOException {
file.seek(offset);
byte[] hdr = new byte[EXEHDRSZ];
file.readFully(hdr);
ReadMemoryAccess memory = new ReadMemoryAccess(hdr, true);
commonSetup(memory);
}
public ExeHeader(byte[] hdr, boolean little) throws IOException {
ReadMemoryAccess memory = new ReadMemoryAccess(hdr, true);
commonSetup(memory);
}
public ExeHeader(ReadMemoryAccess memory) throws IOException {
commonSetup(memory);
}
void commonSetup(ReadMemoryAccess memory) throws IOException {
if (memory.getSize() < EXEHDRSZ) {
throw new IOException("Not DOS EXE format"); //$NON-NLS-1$
}
memory.getBytes(e_signature);
if (e_signature[0] != 'M' || e_signature[1] != 'Z') {
throw new IOException(CCorePlugin.getResourceString("Util.exception.notDOSFormat")); //$NON-NLS-1$
}
e_lastsize = memory.getShort();
e_nblocks = memory.getShort();
e_nreloc = memory.getShort();
e_hdrsize = memory.getShort();
e_minalloc = memory.getShort();
e_maxalloc = memory.getShort();
e_ss = memory.getShort();
e_sp = memory.getShort();
e_checksum = memory.getShort();
e_ip = memory.getShort();
e_cs = memory.getShort();
e_relocoffs = memory.getShort();
e_noverlay = memory.getShort();
}
@Override
public String toString() {
StringBuffer buffer = new StringBuffer();
buffer.append("EXE HEADER VALUES").append(NL); //$NON-NLS-1$
buffer.append("signature "); //$NON-NLS-1$
buffer.append((char)e_signature[0] + " " + (char)e_signature[1]); //$NON-NLS-1$
buffer.append(NL);
buffer.append("lastsize: 0x"); //$NON-NLS-1$
buffer.append(Long.toHexString(new Short(e_lastsize).longValue()));
buffer.append(NL);
buffer.append("nblocks: 0x"); //$NON-NLS-1$
buffer.append(Long.toHexString(new Short(e_nblocks).longValue()));
buffer.append(NL);
buffer.append("nreloc: 0x"); //$NON-NLS-1$
buffer.append(Long.toHexString(new Short(e_nreloc).longValue()));
buffer.append(NL);
buffer.append("hdrsize: 0x"); //$NON-NLS-1$
buffer.append(Long.toHexString(new Short(e_hdrsize).longValue()));
buffer.append(NL);
buffer.append("minalloc: 0x"); //$NON-NLS-1$
buffer.append(Long.toHexString(new Short(e_minalloc).longValue()));
buffer.append(NL);
buffer.append("maxalloc: 0x"); //$NON-NLS-1$
buffer.append(Long.toHexString(new Short(e_maxalloc).longValue()));
buffer.append(NL);
buffer.append("ss: 0x"); //$NON-NLS-1$
buffer.append(Long.toHexString(new Short(e_ss).longValue()));
buffer.append(NL);
buffer.append("sp: 0x"); //$NON-NLS-1$
buffer.append(Long.toHexString(new Short(e_sp).longValue()));
buffer.append(NL);
buffer.append("checksum: 0x"); //$NON-NLS-1$
buffer.append(Long.toHexString(new Short(e_checksum).longValue()));
buffer.append(NL);
buffer.append("ip: 0x"); //$NON-NLS-1$
buffer.append(Long.toHexString(new Short(e_ip).longValue()));
buffer.append(NL);
buffer.append("cs: 0x"); //$NON-NLS-1$
buffer.append(Long.toHexString(new Short(e_cs).longValue()));
buffer.append(NL);
buffer.append("relocoffs: 0x"); //$NON-NLS-1$
buffer.append(Long.toHexString(new Short(e_relocoffs).longValue()));
buffer.append(NL);
buffer.append("overlay: 0x"); //$NON-NLS-1$
buffer.append(Long.toHexString(new Short(e_noverlay).longValue()));
buffer.append(NL);
return buffer.toString();
}
}
public ExeHeader getExeHeader() throws IOException {
return ehdr;
}
@Override
public String toString() {
StringBuffer buffer = new StringBuffer();
buffer.append(rfile).append(NL);
buffer.append(ehdr);
return buffer.toString();
}
public Exe(String file) throws IOException {
rfile = new RandomAccessFile(file, "r"); //$NON-NLS-1$
try {
ehdr = new ExeHeader(rfile);
} finally {
if (ehdr == null) {
rfile.close();
}
}
}
public static void main(String[] args) {
try {
Exe exe = new Exe(args[0]);
System.out.println(exe);
} catch (IOException e) {
e.printStackTrace();
}
}
}
|
