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GP-3543 corrected ELF Android packed reloc bug and sleb128 datatype

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ghidra1 2023-06-13 18:31:26 -04:00
parent d40c5165f5
commit bcfc7c84d8
2 changed files with 23 additions and 7 deletions
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21
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/AbstractLeb128DataType.java
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@ -21,7 +21,6 @@ import java.io.InputStream;
import ghidra.docking.settings.*;
import ghidra.program.model.mem.MemBuffer;
import ghidra.program.model.scalar.Scalar;
import ghidra.util.classfinder.ClassTranslator;
/**
* An abstract base class for a LEB128 variable length integer data type.
@ -82,13 +81,27 @@ public abstract class AbstractLeb128DataType extends BuiltIn implements Dynamic
maxLength = LEB128.MAX_SUPPORTED_LENGTH;
}
int len = getLength(buf, maxLength);
if (len < 1) {
return null; // error, or more than 10 bytes long
}
long val;
try (InputStream is = buf.getInputStream(0, maxLength)) {
long val = LEB128.read(is, signed);
return new Scalar(64 - Long.numberOfLeadingZeros(val), val, signed);
val = LEB128.read(is, signed);
}
catch (IOException e) {
return null; // memory error, or more than 10 bytes long
return null; // error, or more than 10 bytes long
}
// approximate bitLength from storage byte length
int bitLength = Math.max(64, len * 7);
int mod = bitLength % 8;
if (mod != 0) {
bitLength += (8 - mod);
}
return new Scalar(bitLength, val, signed);
}
@Override