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Create symbols for data exports.

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This commit is contained in:
James Benton 2019-10-02 19:50:05 +01:00
parent df0b8cd768
commit f9f61cdf2a
1 changed files with 36 additions and 0 deletions
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36
src/main/java/cafeloader/Cafe_ElfExtension.java
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@ -1,5 +1,8 @@
package cafeloader; package cafeloader;
import java.io.IOException;
import ghidra.app.util.bin.BinaryReader;
import ghidra.app.util.bin.format.elf.*; import ghidra.app.util.bin.format.elf.*;
import ghidra.app.util.bin.format.elf.extend.*; import ghidra.app.util.bin.format.elf.extend.*;
import ghidra.program.model.address.*; import ghidra.program.model.address.*;
@ -109,10 +112,43 @@ public class Cafe_ElfExtension extends ElfExtension {
processRplCrcs(elfLoadHelper, sectionHeader); processRplCrcs(elfLoadHelper, sectionHeader);
} else if (headertype == SHT_RPL_FILEINFO.value) { } else if (headertype == SHT_RPL_FILEINFO.value) {
processRplFileInfo(elfLoadHelper, sectionHeader); processRplFileInfo(elfLoadHelper, sectionHeader);
} else if (headertype == SHT_RPL_EXPORTS.value) {
processRplExports(elfLoadHelper, sectionHeader);
} }
} }
} }
private void processRplExports(ElfLoadHelper elfLoadHelper, ElfSectionHeader sectionHeader) {
String sectionName = sectionHeader.getNameAsString();
Address loadAddress = elfLoadHelper.findLoadAddress(sectionHeader, 0);
Memory memory = elfLoadHelper.getProgram().getMemory();
boolean isDataExports = sectionName.contentEquals(".dexports");
if (!isDataExports) {
// Function exports are already in symbol table
return;
}
// Create symbols for data exports
BinaryReader reader = elfLoadHelper.getElfHeader().getReader();
reader.setPointerIndex(sectionHeader.getOffset());
try {
int count = reader.readNextInt();
int signature = reader.readNextInt();
for (int i = 0; i < count; ++i) {
int value = reader.readNextInt();
int nameOffset = reader.readNextInt();
boolean isTlsExport = (nameOffset & 0x80000000) != 0;
String name = reader.readAsciiString(sectionHeader.getOffset() + (nameOffset & 0x7FFFFFFF));
elfLoadHelper.createSymbol(elfLoadHelper.getDefaultAddress(value), name, true, false, null);
}
} catch (IOException e) {
e.printStackTrace();
} catch (InvalidInputException e) {
e.printStackTrace();
}
}
private void processRplCrcs(ElfLoadHelper elfLoadHelper, ElfSectionHeader sectionHeader) { private void processRplCrcs(ElfLoadHelper elfLoadHelper, ElfSectionHeader sectionHeader) {
Address address = elfLoadHelper.findLoadAddress(sectionHeader, 0); Address address = elfLoadHelper.findLoadAddress(sectionHeader, 0);
if (address == null) { if (address == null) {