-
Notifications
You must be signed in to change notification settings - Fork 5.6k
/
RustStringAnalyzer.java
129 lines (109 loc) · 3.54 KB
/
RustStringAnalyzer.java
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
/* ###
* IP: GHIDRA
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ghidra.app.plugin.core.analysis.rust;
import ghidra.app.services.*;
import ghidra.app.util.importer.MessageLog;
import ghidra.framework.options.Options;
import ghidra.program.model.address.*;
import ghidra.program.model.data.*;
import ghidra.program.model.listing.Data;
import ghidra.program.model.listing.Program;
import ghidra.program.util.DefinedDataIterator;
import ghidra.util.exception.CancelledException;
import ghidra.util.task.TaskMonitor;
/**
* Splits non-terminated strings into separate strings
*/
public class RustStringAnalyzer extends AbstractAnalyzer {
private final static String NAME = "Rust String Analyzer";
private final static String DESCRIPTION = "Analyzer to split rust static strings into slices";
public RustStringAnalyzer() {
super(NAME, DESCRIPTION, AnalyzerType.BYTE_ANALYZER);
setPriority(AnalysisPriority.LOW_PRIORITY);
setDefaultEnablement(true);
setSupportsOneTimeAnalysis(true);
}
@Override
public boolean canAnalyze(Program program) {
String name = program.getCompiler();
return name.contains(RustConstants.RUST_COMPILER);
}
@Override
public boolean added(Program program, AddressSetView set, TaskMonitor monitor, MessageLog log)
throws CancelledException {
DefinedDataIterator dataIterator = DefinedDataIterator.definedStrings(program);
for (Data data : dataIterator) {
Address start = data.getAddress();
int length = data.getLength();
recurseString(program, start, length);
monitor.checkCancelled();
}
return true;
}
@Override
public void registerOptions(Options options, Program program) {
// No options
}
@Override
public void optionsChanged(Options options, Program program) {
// Options changed
}
private static void recurseString(Program program, Address start, int maxLen) {
int newLength = getMaxStringLength(program, start, maxLen);
if (newLength <= 0) {
return;
}
DataType dt =
new ArrayDataType(CharDataType.dataType, newLength, CharDataType.dataType.getLength());
try {
DataUtilities.createData(program, start, dt, 0,
DataUtilities.ClearDataMode.CLEAR_ALL_CONFLICT_DATA);
if (newLength < maxLen) {
recurseString(program, start.add(newLength), maxLen - newLength);
}
}
catch (Exception e) {
// Couldn't define string
}
}
/**
* Get the number of bytes to the next reference, or the max length
* @param program The {@link Program}
* @param address The {@link Address}
* @param maxLen The maximum length
* @return maximum length to create the string
*/
private static int getMaxStringLength(Program program, Address address, int maxLen) {
AddressIterator refIter =
program.getReferenceManager().getReferenceDestinationIterator(address.next(), true);
Address next = refIter.next();
if (next == null) {
return -1;
}
long len = -1;
try {
len = next.subtract(address);
if (len > maxLen) {
len = maxLen;
}
return (int) len;
}
catch (IllegalArgumentException e) {
// bad address subtraction
}
return (int) len;
}
}