public void generatePatch()
{
int codeAddr = (int)getCodeAddr();
Console.Out.WriteLine(String.Format("New code address: {0:X8}", codeAddr));
FileInfo f = new FileInfo(romdir.FullName + "/newcode.bin");
if (!f.Exists)
{
return;
}
FileStream fs = f.OpenRead();
byte[] newdata = new byte[fs.Length];
fs.Read(newdata, 0, (int)fs.Length);
fs.Close();
ByteArrayOutputStream extradata = new ByteArrayOutputStream();
extradata.write(newdata);
extradata.align(4);
int hookAddr = codeAddr + extradata.getPos();
f = new FileInfo(romdir.FullName + "/newcode.sym");
StreamReader s = f.OpenText();
while (!s.EndOfStream)
{
string l = s.ReadLine();
int ind = -1;
if (l.Contains("nsub_"))
{
ind = l.IndexOf("nsub_");
}
if (l.Contains("hook_"))
{
ind = l.IndexOf("hook_");
}
if (l.Contains("repl_"))
{
ind = l.IndexOf("repl_");
}
if (ind != -1)
{
int destRamAddr = parseHex(l.Substring(0, 8)); //Redirect dest addr
int ramAddr = parseHex(l.Substring(ind + 5, 8)); //Patched addr
uint val = 0;
int ovId = -1;
if (l.Contains("_ov_"))
{
ovId = parseHex(l.Substring(l.IndexOf("_ov_") + 4, 2));
}
int patchCategory = 0;
string cmd = l.Substring(ind, 4);
int thisHookAddr = 0;
switch (cmd)
{
case "nsub":
val = makeBranchOpcode(ramAddr, destRamAddr, false);
break;
case "repl":
val = makeBranchOpcode(ramAddr, destRamAddr, true);
break;
case "hook":
//Jump to the hook addr
thisHookAddr = hookAddr;
val = makeBranchOpcode(ramAddr, hookAddr, false);
uint originalOpcode = handler.readFromRamAddr(ramAddr, ovId);
//TODO: Parse and fix original opcode in case of BL instructions
//so it's possible to hook over them too.
extradata.writeUInt(originalOpcode);
hookAddr += 4;
extradata.writeUInt(0xE92D5FFF); //push {r0-r12, r14}
hookAddr += 4;
extradata.writeUInt(makeBranchOpcode(hookAddr, destRamAddr, true));
hookAddr += 4;
extradata.writeUInt(0xE8BD5FFF); //pop {r0-r12, r14}
hookAddr += 4;
extradata.writeUInt(makeBranchOpcode(hookAddr, ramAddr + 4, false));
hookAddr += 4;
extradata.writeUInt(0x12345678);
hookAddr += 4;
break;
default:
continue;
}
//Console.Out.WriteLine(String.Format("{0:X8}:{1:X8} = {2:X8}", patchCategory, ramAddr, val));
Console.Out.WriteLine(String.Format(" {0:X8} {1:X8}", destRamAddr, thisHookAddr));
handler.writeToRamAddr(ramAddr, val, ovId);
}
}
s.Close();
int newArenaOffs = codeAddr + extradata.getPos();
handler.writeToRamAddr(ArenaLoOffs, (uint)newArenaOffs, -1);
handler.sections.Add(new Arm9BinSection(extradata.getArray(), codeAddr, 0));
handler.saveSections();
}
