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fixed elf parsing of 2G+ files

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32 bit elf parser of 2G+ elf files does not read
some field properties because it does signed extension
when reading unsigned integer

Change-Id: I64b47cc0849d4fb41daec258b2a595003b9de734
This commit is contained in:
Alena Laskavaia 2016-05-09 15:35:38 -04:00
parent 3f660b725b
commit b08253b70a
2 changed files with 25 additions and 16 deletions
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22
core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/ERandomAccessFile.java
View file

@ -23,7 +23,7 @@ public class ERandomAccessFile extends RandomAccessFile {
private boolean isle;
private long ptr_offset;
int val[] = new int[4];
public ERandomAccessFile(String file, String mode) throws IOException {
super(file, mode);
}
@ -36,7 +36,7 @@ public class ERandomAccessFile extends RandomAccessFile {
{
isle = le;
}
public final short readShortE() throws IOException {
val[0] = read();
val[1] = read();
@ -47,7 +47,7 @@ public class ERandomAccessFile extends RandomAccessFile {
}
return (short)((val[0] << 8) + val[1]);
}
public final long readIntE() throws IOException
{
val[0] = read();
@ -56,10 +56,14 @@ public class ERandomAccessFile extends RandomAccessFile {
val[3] = read();
if ((val[0] | val[1] | val[2] | val[3]) < 0)
throw new EOFException();
long value;
if ( isle ) {
return ((val[3] << 24) + (val[2] << 16) + (val[1] << 8) + val[0]);
value= ((val[3] << 24) + (val[2] << 16) + (val[1] << 8) + val[0]) ;
} else{
value= ((val[0] << 24) + (val[1] << 16) + (val[2] << 8) + val[3]);
}
return ((val[0] << 24) + (val[1] << 16) + (val[2] << 8) + val[3]);
return value & 0x00000000ffffffffL;
}
public final long readLongE() throws IOException
@ -67,8 +71,8 @@ public class ERandomAccessFile extends RandomAccessFile {
byte [] bytes = new byte[8];
long result = 0;
super.readFully(bytes);
int shift = 0;
if ( isle )
int shift = 0;
if ( isle )
for(int i=7; i >= 0; i-- )
{
shift = i*8;
@ -82,7 +86,7 @@ public class ERandomAccessFile extends RandomAccessFile {
}
return result;
}
public final void readFullyE(byte [] bytes) throws IOException
{
super.readFully(bytes);
@ -92,7 +96,7 @@ public class ERandomAccessFile extends RandomAccessFile {
{
tmp = bytes[i];
bytes[i] = bytes[bytes.length - i -1];
bytes[bytes.length - i -1] = tmp;
bytes[bytes.length - i -1] = tmp;
}
}

19
core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/elf/parser/ElfParser.java
View file

@ -10,7 +10,7 @@
* Anton Leherbauer (Wind River Systems)
*******************************************************************************/
package org.eclipse.cdt.utils.elf.parser;
import java.io.EOFException;
import java.io.IOException;
@ -54,26 +54,26 @@ public class ElfParser extends AbstractCExtension implements IBinaryParser {
// continue, the array was to small.
}
}
//Take a second run at it if the data array failed.
if(attribute == null) {
attribute = Elf.getAttributes(path.toOSString());
}
if (attribute != null) {
switch (attribute.getType()) {
case Attribute.ELF_TYPE_EXE :
binary = createBinaryExecutable(path);
break;
case Attribute.ELF_TYPE_SHLIB :
binary = createBinaryShared(path);
break;
case Attribute.ELF_TYPE_OBJ :
binary = createBinaryObject(path);
break;
case Attribute.ELF_TYPE_CORE :
binary = createBinaryCore(path);
break;
@ -84,7 +84,12 @@ public class ElfParser extends AbstractCExtension implements IBinaryParser {
}
} catch (IOException e) {
if (hints == null) {
binary = createBinaryArchive(path);
try {
binary = createBinaryArchive(path);
} catch (IOException e2) {
CCorePlugin.log(e); // log original exception
throw e2;
}
}
}
}