Mirrors_Framework/ghidra
1
0
Fork 0
mirror of https://github.com/NationalSecurityAgency/ghidra.git synced 2026-05-23 10:46:26 +08:00
Code Issues Actions Packages Projects Releases Wiki Activity

GP-3793 revised ELF symbol handling so as not to preclude use of UTF8

Browse Source
This commit is contained in:
ghidra1
2023-08-28 18:11:44 -04:00
parent ae31a25490
commit de43ed0656
2 changed files with 23 additions and 40 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/elf/ElfSectionHeader.java
+7 -13
View File
@@ -94,8 +94,7 @@ public class ElfSectionHeader implements StructConverter, MemoryLoadable {
private ElfCompressedSectionHeader compressedHeader;
public ElfSectionHeader(BinaryReader reader, ElfHeader header)
throws IOException {
public ElfSectionHeader(BinaryReader reader, ElfHeader header) throws IOException {
this.reader = reader;
this.header = header;
@@ -237,9 +236,7 @@ public class ElfSectionHeader implements StructConverter, MemoryLoadable {
* @return the section address alignment constraints
*/
public long getAddressAlignment() {
return compressedHeader == null
? sh_addralign
: compressedHeader.getCh_addralign();
return compressedHeader == null ? sh_addralign : compressedHeader.getCh_addralign();
}
/**
@@ -297,7 +294,7 @@ public class ElfSectionHeader implements StructConverter, MemoryLoadable {
}
private boolean isSupportedCompressionType(int compressionType) {
return switch ( compressionType ) {
return switch (compressionType) {
case ElfCompressedSectionHeader.ELFCOMPRESS_ZLIB -> true;
default -> false;
};
@@ -367,7 +364,7 @@ public class ElfSectionHeader implements StructConverter, MemoryLoadable {
long stringTableOffset = sections[e_shstrndx].getOffset();
long offset = stringTableOffset + sh_name;
if (offset < reader.length()) {
name = reader.readAsciiString(stringTableOffset + sh_name);
name = reader.readUtf8String(stringTableOffset + sh_name);
if ("".equals(name)) {
name = null;
}
@@ -447,9 +444,7 @@ public class ElfSectionHeader implements StructConverter, MemoryLoadable {
* @return logical size of this section, see {@link #getSize()}
*/
public long getLogicalSize() {
return compressedHeader == null
? sh_size
: compressedHeader.getCh_size();
return compressedHeader == null ? sh_size : compressedHeader.getCh_size();
}
@Override
@@ -461,8 +456,7 @@ public class ElfSectionHeader implements StructConverter, MemoryLoadable {
@Override
public InputStream getFilteredLoadInputStream(ElfLoadHelper elfLoadHelper, Address start,
long dataLength, BiConsumer<String, Throwable> errorConsumer) throws IOException {
InputStream is = isCompressed()
? getDecompressedDataStream(dataLength, errorConsumer)
InputStream is = isCompressed() ? getDecompressedDataStream(dataLength, errorConsumer)
: getRawInputStream();
return header.getLoadAdapter()
.getFilteredLoadInputStream(elfLoadHelper, this, start, dataLength, is);
@@ -573,7 +567,7 @@ public class ElfSectionHeader implements StructConverter, MemoryLoadable {
}
this.sh_addr = header.unadjustAddressForPrelink(addr);
}
/**
* @see ghidra.app.util.bin.StructConverter#toDataType()
*/
Ghidra/Features/Base/src/main/java/ghidra/app/util/opinion/ElfProgramBuilder.java
+16 -27
View File
@@ -995,7 +995,7 @@ class ElfProgramBuilder extends MemorySectionResolver implements ElfLoadHelper {
int symbolIndex = reloc.getSymbolIndex();
String symbolName = symbolTable != null ? symbolTable.getSymbolName(symbolIndex) : "";
if (symbolName != null && isUnsupportedASCIISymbolName(symbolName)) {
if (symbolName != null && SymbolUtilities.containsInvalidChars(symbolName)) {
symbolName = getEscapedSymbolName(symbolName);
}
@@ -2094,9 +2094,9 @@ class ElfProgramBuilder extends MemorySectionResolver implements ElfLoadHelper {
isPrimary = (existingSym == null);
}
if (name != null && isUnsupportedASCIISymbolName(name)) {
if (SymbolUtilities.containsInvalidChars(name)) {
String escapedName = getEscapedSymbolName(name);
log("Unsupported ASCII symbol name has been escaped: \"" + escapedName + "\"");
log("Unsupported symbol name has been escaped: \"" + escapedName + "\"");
name = escapedName;
}
@@ -2134,36 +2134,25 @@ class ElfProgramBuilder extends MemorySectionResolver implements ElfLoadHelper {
}
}
private boolean isUnsupportedASCIISymbolName(String name) {
for (char c : name.toCharArray()) {
if (!StringUtilities.isAsciiChar(c) || c == ' ') {
return true;
}
}
return false;
}
private String getEscapedSymbolName(String name) {
// Do not preclude use of UTF8 strings
StringBuilder escapedBuf = new StringBuilder();
for (char c : name.toCharArray()) {
if (c < 0 || c > 0x7f) {
// format non-ASCII as escaped numeric hex value \xNN
escapedBuf.append("\\x%02x".formatted((int) c));
}
else if (c < ' ') {
// format as ^Control character for consistency with readelf
c += 64; // get ASCII control character, starts with ^@
name.codePoints().forEach(cp -> {
if (cp < 0x20) {
// Format as ^Control character for consistency with readelf
cp += 0x40; // get ASCII control character, starts with ^@
escapedBuf.append('^');
escapedBuf.append(c);
escapedBuf.appendCodePoint(cp);
}
else if (c == 0x7f) {
// format as ^? character for consistency with readelf
else if (cp == 0x7F) {
// Format as ^? character for consistency with readelf
escapedBuf.append("^?");
}
else {
escapedBuf.append(c);
// Assume valid code point
escapedBuf.appendCodePoint(cp);
}
}
});
return escapedBuf.toString();
}
@@ -2841,8 +2830,8 @@ class ElfProgramBuilder extends MemorySectionResolver implements ElfLoadHelper {
private int createString(Address address) throws CodeUnitInsertionException {
Data d = listing.getDataAt(address);
if (d == null || !TerminatedStringDataType.dataType.isEquivalent(d.getDataType())) {
d = listing.createData(address, TerminatedStringDataType.dataType, -1);
if (d == null || !StringUTF8DataType.dataType.isEquivalent(d.getDataType())) {
d = listing.createData(address, StringUTF8DataType.dataType, -1);
}
return d.getLength();
}