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Hacky fix for the wrong imports relocations.

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This commit is contained in:
Maschell 2019-03-07 01:30:14 +01:00
parent 2ddc46b43a
commit 738ebe9c6a
1 changed files with 30 additions and 1 deletions
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31
src/main/java/rpx/RPXFileSystem.java
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@ -34,6 +34,7 @@ import ghidra.app.util.bin.ByteProvider;
import ghidra.app.util.bin.format.elf.ElfException;
import ghidra.app.util.bin.format.elf.ElfHeader;
import ghidra.app.util.bin.format.elf.ElfSectionHeader;
import ghidra.app.util.bin.format.elf.ElfSectionHeaderConstants;
import ghidra.formats.gfilesystem.FSRL;
import ghidra.formats.gfilesystem.FSRLRoot;
import ghidra.formats.gfilesystem.FSUtilities;
@ -158,13 +159,41 @@ public class RPXFileSystem implements GFileSystem {
shdr_data_elf_offset += curSize;
}
}
// Hacky way to fix import relocations
if (h.getType() == ElfSectionHeaderConstants.SHT_SYMTAB) {
int symbolCount = (int) ((int) (curSize) / h.getEntrySize());
long entryPos = 0;
for (int i = 0; i < symbolCount; i++) {
long test_offset = (int) (offset + entryPos + 4);
buffer.position((int) test_offset);
int val = buffer.getInt();
if ((val & 0xF0000000L) == 0xC0000000L) {
long fixedAddress = val - 0xC0000000L + 0x01000000L;
buffer.position((int) test_offset);
buffer.putInt((int) fixedAddress);
}
entryPos += h.getEntrySize();
}
}
buffer = checkBuffer(buffer, shdr_elf_offset + 0x28);
buffer.position((int) shdr_elf_offset);
System.out.println("Write header " + String.format("%08X", shdr_elf_offset));
buffer.putInt(h.getName());
buffer.putInt(h.getType());
buffer.putInt((int) flags);
buffer.putInt((int) h.getAddress());
// Hacky way to fix import relocations
if ((h.getAddress() & 0xF0000000L) == 0xC0000000L) {
long fixedAddress = h.getAddress() - 0xC0000000L + 0x01000000L;
buffer.putInt((int) fixedAddress);
} else {
buffer.putInt((int) h.getAddress());
}
buffer.putInt((int) offset);
buffer.putInt((int) curSize);
buffer.putInt(h.getLink());