LiveSplit plugin for Sekiro: Shadows Die Twice

Sekiro.asl

/*
    Sekiro Speerunning Plugin by B3
    v1.1

    Features:
        - Fixed timer implementation.
        - Auto start
        - No logo mod.
        - No tutorial mod.
    
    Patches: 
        23/04/19 v1.1 
         - Compatibility for game version 1.03
         - fixed timer flickering. (thanks CapitaineToinon)

    If you have issues or questions message me (B3LYP#2159)
    on the Sekiro Speedrunning Discord (https://discord.gg/DVXvRPu)

    Technical:
        This plugin modifies the in-game timer of Sekiro to make it run at the correct 
        speed independent of frame rate. The fix as C++ code for reference:

        ''' 
        void updateTimerOriginal(float frame_time){
            igt += static_cast<unsigned int>(frame_time); 
        }

        void updateTimerNew(float frame_time){
            static float frac = 0.f;
            frac += frame_time - static_cast<unsigned int>(frame_time);
            if(frac >= 1.f){
                frame_time++;
                frac--;
            }
            igt += static_cast<unsigned int>(frame_time); 
        }
        '''
*/

state("Sekiro", "1.02")
{
	int igt : 0x3B47CF0, 0x9C;
}

state("Sekiro", "1.03")
{
	int igt : 0x3B48D30, 0x9C;
}

init
{
    /*We have to wait a little for SteamDRM to decrypt the exe.
    This could potentially cause issues. Replace with code that
    detects decryption if necessary
    */
    System.Threading.Thread.Sleep(3000);

    vars.game_is_patched = false;
    //variable used to cache igt 
    vars.internal_time = 0;

    //print(modules.First().ModuleMemorySize.ToString());
    switch(modules.First().ModuleMemorySize){
	case 67727360:
        version = "1.02";
        break;
    case 67731456:
        version = "1.03";
        break;
    default:
        print("Unkown version detected");
        return false;
    }
    
    //TutorialMsgDialog (Tutorial popups that pause the game)
    IntPtr TutorialMsgDialog = (IntPtr)0;
    //CSTutorialDialog (Little noise making tutorial popups that come up on the left)
    IntPtr CSTutorialDialog = (IntPtr)0;
    //CSMenuTutorialDialog (Tutorial messages in the pause and warp menus)
    IntPtr CSMenuTutorialDialog = (IntPtr)0;

    //no logo
    IntPtr noLogo = (IntPtr)0; //no logo mod

    //timer mod
    IntPtr igtFixEntryPoint = (IntPtr)0;
        //cvttss2si rax, xmm0                      <---
        //add     [rcx+9Ch], eax  ; timer_update
        //mov     rax, cs:qword_143B47CF0
        //cmp     dword ptr [rax+9Ch], 0D693A018h
        //jbe     short loc_1407A8D41
    IntPtr igtFixCodeLoc = (IntPtr)0; //Start of TutorialMsgDialog constructor. This is dead code after applying the no-tut mod so the timer mod can be injected here
  
    switch(version){
    case "1.02":
        TutorialMsgDialog = (IntPtr)0x140DC7A8E;
        CSTutorialDialog = (IntPtr)0x140D6EB98;
        CSMenuTutorialDialog = (IntPtr)0x140D6D51C;
        noLogo = (IntPtr)0x140DEBF2B; 
        igtFixEntryPoint = (IntPtr)0x1407A8D19;
        igtFixCodeLoc = (IntPtr)0x140DBE2D0; 
        break;
    case "1.03":
        TutorialMsgDialog = (IntPtr)0x140DC83BE;
        CSTutorialDialog = (IntPtr)0x140D6F4C8;
        CSMenuTutorialDialog = (IntPtr)0x140D6DE4C;
        noLogo = (IntPtr)0x140DEC85B;
        igtFixEntryPoint = (IntPtr)0x1407A8D99;
        igtFixCodeLoc = (IntPtr)0x140DBEC00;
        break;
    }

    
    //fix detour
    var igtFixDetourCode = new List<byte>(){0xE9};
    int detourTarget = (int) (igtFixCodeLoc.ToInt64()-(igtFixEntryPoint.ToInt64()+5));
    igtFixDetourCode.AddRange(BitConverter.GetBytes(detourTarget));

    //fix body
    var frac = game.AllocateMemory(sizeof(double));
    var igtFixCode = new List<byte>(){
        0x53, //push rbx
        0x48, 0xBB //mov rbx, fracAddress
        };
    igtFixCode.AddRange(BitConverter.GetBytes((long)frac));
    igtFixCode.AddRange(new byte[]{
        0x44, 0x0F, 0x10, 0xF0, //movups xmm14, xmm0
        0xF3, 0x45, 0x0F, 0x5A, 0xF6, //cvtss2sd xmm14, xmm14
        0xF2, 0x49, 0x0F, 0x2C, 0xC6, //cvttsd2si rax, xmm14
        0xF2, 0x4C, 0x0F, 0x2A, 0xF8, //cvtsi2sd xmm15, rax
        0xF2, 0x45, 0x0F, 0x5C, 0xF7, //subsd xmm14, xmm15
        0x66, 0x44, 0x0F, 0x10, 0x3B, //movupd xmm15, [rbx]
        0xF2, 0x45, 0x0F, 0x58, 0xFE, //addsd xmm15, xmm14
        0x66, 0x44, 0x0F, 0x11, 0x3B, //movupd [rbx], xmm15
        0xF2, 0x49, 0x0F, 0x2C, 0xC7, //cvttsd2si rax, xmm15
        0x48, 0x85, 0xC0, //test rax, rax
        0x74, 0x1D, //jz +1D
        0x90, 0x90, 0x90, 0x90, //nop
        0xF2, 0x4C, 0x0F, 0x2A, 0xF0, //cvtsi2sd xmm14, rax
        0xF2, 0x45, 0x0F, 0x5C, 0xFE, //subsd xmm15, xmm14
        0x66, 0x44, 0x0F, 0x11, 0x3B, //movupd [rbx], xmm15
        0xF2, 0x45, 0x0F, 0x5A, 0xF6, //cvtsd2ss xmm14, xmm14
        0xF3, 0x41, 0x0F, 0x58, 0xC6, //addss xmm0, xmm14
        0x45, 0x0F, 0x57, 0xF6, //xorps xmm14, xmm14
        0x45, 0x0F, 0x57, 0xFF, //xorps xmm15, xmm15
        0x5B, //pop rbx
        0xF3, 0x48, 0x0F, 0x2C, 0xC0, //cvttss2si rax,xmm0
        0xE9 //jmp return igtFixEntryPoint +5
        });

    int jmpTarget = (int)((igtFixEntryPoint.ToInt64()+5)-(igtFixCodeLoc.ToInt64()+103+5));
    igtFixCode.AddRange(BitConverter.GetBytes(jmpTarget));
    

    //Write fixes to game memory
    game.Suspend();

    //No Tutorials
    vars.game_is_patched = true;
    vars.game_is_patched &= game.WriteBytes(TutorialMsgDialog,new byte[] {0x75});
    vars.game_is_patched &= game.WriteBytes(CSTutorialDialog, new byte[] {0x75});
    vars.game_is_patched &= game.WriteBytes(CSMenuTutorialDialog, new byte[] {0x75});

    //No logo 
    vars.game_is_patched &= game.WriteBytes(noLogo, new byte[] {0x75});

    //No broken timer
    vars.game_is_patched &= game.WriteBytes(igtFixCodeLoc, igtFixCode.ToArray());
    vars.game_is_patched &= game.WriteBytes(igtFixEntryPoint, igtFixDetourCode.ToArray()); 

    game.Resume();

    if(vars.game_is_patched != true){
        print("Error encountered while writing patch to game memory");
        return false;
    }
    return true;
}

update{
    //only update if the game was succesfully patched
    return vars.game_is_patched;
}

start{
    if(old.igt == 0 && current.igt > 0){
        vars.internal_time = 0;
        return true;
    }
}

isLoading{
    return true;
}

gameTime
{  
    if(/*current.igt < old.igt || */current.igt == 0){
        return TimeSpan.FromMilliseconds(vars.internal_time);
    }else{
        vars.internal_time = current.igt;
        return TimeSpan.FromMilliseconds(current.igt);
    }
}

Great, go ahead and change the URL in the XML to your fork.