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Set r2 to sda2Base and r13 to sdaBase.

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This commit is contained in:
James Benton 2019-10-02 20:44:23 +01:00
parent f9f61cdf2a
commit 8155a56707
1 changed files with 28 additions and 1 deletions
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29
src/main/java/cafeloader/Cafe_ElfExtension.java
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@ -1,6 +1,7 @@
package cafeloader; package cafeloader;
import java.io.IOException; import java.io.IOException;
import java.math.BigInteger;
import ghidra.app.util.bin.BinaryReader; import ghidra.app.util.bin.BinaryReader;
import ghidra.app.util.bin.format.elf.*; import ghidra.app.util.bin.format.elf.*;
@ -11,6 +12,7 @@ import ghidra.program.model.mem.Memory;
import ghidra.program.model.mem.MemoryAccessException; import ghidra.program.model.mem.MemoryAccessException;
import ghidra.program.model.symbol.SourceType; import ghidra.program.model.symbol.SourceType;
import ghidra.program.model.data.*; import ghidra.program.model.data.*;
import ghidra.program.model.lang.Register;
import ghidra.util.*; import ghidra.util.*;
import ghidra.util.exception.*; import ghidra.util.exception.*;
import ghidra.util.task.TaskMonitor; import ghidra.util.task.TaskMonitor;
@ -170,7 +172,8 @@ public class Cafe_ElfExtension extends ElfExtension {
} }
int version = RPL_FILEINFO_V3; int version = RPL_FILEINFO_V3;
Memory memory = elfLoadHelper.getProgram().getMemory(); Program program = elfLoadHelper.getProgram();
Memory memory = program.getMemory();
try { try {
version = memory.getInt(fileInfoAddr); version = memory.getInt(fileInfoAddr);
} catch (MemoryAccessException e) { } catch (MemoryAccessException e) {
@ -181,6 +184,8 @@ public class Cafe_ElfExtension extends ElfExtension {
new StructureDataType(new CategoryPath("/ELF"), "Elf32_RplFileInfo", 0); new StructureDataType(new CategoryPath("/ELF"), "Elf32_RplFileInfo", 0);
int filenameOffset = 0; int filenameOffset = 0;
int sdaBase = 0;
int sda2Base = 0;
if (version >= RPL_FILEINFO_V3) { if (version >= RPL_FILEINFO_V3) {
fileInfo.add(DWordDataType.dataType, "version", null); fileInfo.add(DWordDataType.dataType, "version", null);
fileInfo.add(DWordDataType.dataType, "textSize", null); fileInfo.add(DWordDataType.dataType, "textSize", null);
@ -197,12 +202,34 @@ public class Cafe_ElfExtension extends ElfExtension {
fileInfo.add(DWordDataType.dataType, "filenameOffset", null); fileInfo.add(DWordDataType.dataType, "filenameOffset", null);
try { try {
sdaBase = memory.getInt(fileInfoAddr.add(0x24));
sda2Base = memory.getInt(fileInfoAddr.add(0x28));
filenameOffset = memory.getInt(fileInfoAddr.add(0x30)); filenameOffset = memory.getInt(fileInfoAddr.add(0x30));
} catch (MemoryAccessException e) { } catch (MemoryAccessException e) {
Msg.warn(this, "Failed to read filenameOffset"); Msg.warn(this, "Failed to read filenameOffset");
} }
} }
Address minAddress = program.getAddressFactory().getDefaultAddressSpace().getMinAddress();
Address maxAddress = program.getAddressFactory().getDefaultAddressSpace().getMaxAddress();
if (sdaBase != 0 && minAddress != null && maxAddress != null) {
Register r13 = elfLoadHelper.getProgram().getRegister("r13");
try {
program.getProgramContext().setValue(r13, minAddress, maxAddress, BigInteger.valueOf(sdaBase));
} catch (ContextChangeException e) {
Msg.warn(this, "Error setting r13 to sdabase: " + e);
}
}
if (sda2Base != 0 && minAddress != null && maxAddress != null) {
Register r2 = elfLoadHelper.getProgram().getRegister("r2");
try {
program.getProgramContext().setValue(r2, minAddress, maxAddress, BigInteger.valueOf(sda2Base));
} catch (ContextChangeException e) {
Msg.warn(this, "Error setting r2 to sda2base: " + e);
}
}
int tagOffset = 0; int tagOffset = 0;
if (version >= RPL_FILEINFO_V4_1) { if (version >= RPL_FILEINFO_V4_1) {
fileInfo.add(DWordDataType.dataType, "flags", null); fileInfo.add(DWordDataType.dataType, "flags", null);