Return to the loader when exiting homebrew

source/homebrewboot/BootHomebrew.cpp

@@ -142,16 +142,7 @@ static int RunAppbooter()
 
 	u64 currentStub = getStubDest();
 	loadStub();
-
+	Set_Stub(returnTo(currentStub));
-	if (Set_Stub_Split(0x00010001, "UNEO") < 0)
-	{
-		if (Set_Stub_Split(0x00010001, "ULNR") < 0)
-		{
-			if (!currentStub) currentStub = 0x100000002ULL;
-
-			Set_Stub(currentStub);
-		}
-	}
 
 	gprintf("Exiting USBLoaderGX...\n\n");
 

source/lstub.cpp

@@ -1,4 +1,5 @@
 //functions for manipulating the HBC stub by giantpune
+//updated by blackb0x August 2021
 
 #include <string.h>
 #include <ogcsys.h>
@@ -7,78 +8,70 @@
 
 #include "lstub.h"
 #include "gecko.h"
-
 #include "wad/nandtitle.h"
 
 extern const u8 stub_bin[];
 extern const u32 stub_bin_size;
 
-static char* determineStubTIDLocation()
+static char *determineStubTIDLocation()
 {
-	u32 *stubID = (u32*) 0x80001818;
+	u32 *stubID = (u32 *)0x80001818;
 
-	//HBC stub 1.0.6 and lower, and stub.bin
+	// HBC stub 1.1.4
-	if (stubID[0] == 0x480004c1 && stubID[1] == 0x480004f5)
+	if (stubID[0] == 0x548406B0 && stubID[1] == 0x7C800124)
-		return (char *) 0x800024C6;
+		return (char *)0x80002662;
+	// HBC stub changed @ version 1.0.7.  this file was last updated for HBC 1.0.8
+	else if (stubID[0] == 0x48000859 && stubID[1] == 0x4800088d)
+		return (char *)0x8000286A;
+	// HBC stub 1.0.6 and lower, and stub.bin
+	else if (stubID[0] == 0x480004c1 && stubID[1] == 0x480004f5)
+		return (char *)0x800024C6;
 
-	//HBC stub changed @ version 1.0.7.  this file was last updated for HBC 1.0.8
-	else if (stubID[0] == 0x48000859 && stubID[1] == 0x4800088d) return (char *) 0x8000286A;
-
-	//hexdump( stubID, 0x20 );
 	return NULL;
-
 }
 
 s32 Set_Stub(u64 reqID)
 {
-	if (NandTitles.IndexOf(reqID) < 0) return WII_EINSTALL;
+	if (!hbcStubAvailable())
+		return 0;
+	if (NandTitles.IndexOf(reqID) < 0)
+		return WII_EINSTALL;
 
 	char *stub = determineStubTIDLocation();
-	if (!stub) return -68;
+	if (!stub)
+		return 0;
 
-	stub[0] = TITLE_7( reqID );
+	stub[0] = TITLE_7(reqID);
-	stub[1] = TITLE_6( reqID );
+	stub[1] = TITLE_6(reqID);
-	stub[8] = TITLE_5( reqID );
+	stub[8] = TITLE_5(reqID);
-	stub[9] = TITLE_4( reqID );
+	stub[9] = TITLE_4(reqID);
-	stub[4] = TITLE_3( reqID );
+	stub[4] = TITLE_3(reqID);
-	stub[5] = TITLE_2( reqID );
+	stub[5] = TITLE_2(reqID);
-	stub[12] = TITLE_1( reqID );
+	stub[12] = TITLE_1(reqID);
-	stub[13] = ((u8) (reqID));
+	stub[13] = ((u8)(reqID));
 
 	DCFlushRange(stub, 0x10);
-
 	return 1;
-
-}
-
-s32 Set_Stub_Split(u32 type, const char* reqID)
-{
-	const u32 lower = ((u32)reqID[0] << 24) |
-					  ((u32)reqID[1] << 16) |
-					  ((u32)reqID[2] << 8) |
-					  ((u32)reqID[3]);
-
-	u64 reqID64 = TITLE_ID( type, lower );
-	return Set_Stub(reqID64);
-
 }
 
 void loadStub()
 {
-	char *stubLoc = (char *) 0x80001800;
+	char *stubLoc = (char *)0x80001800;
 	memcpy(stubLoc, stub_bin, stub_bin_size);
 	DCFlushRange(stubLoc, stub_bin_size);
 }
 
 u64 getStubDest()
 {
-	if (!hbcStubAvailable()) return 0;
+	if (!hbcStubAvailable())
+		return 0;
 
 	char ret[8];
 	u64 retu = 0;
 
 	char *stub = determineStubTIDLocation();
-	if (!stub) return 0;
+	if (!stub)
+		return 0;
 
 	ret[0] = stub[0];
 	ret[1] = stub[1];
@@ -90,13 +83,44 @@ u64 getStubDest()
 	ret[7] = stub[13];
 
 	memcpy(&retu, ret, 8);
-
 	return retu;
 }
 
 u8 hbcStubAvailable()
 {
-	char * sig = (char *) 0x80001804;
+	char *sig = (char *)0x80001804;
 	return (strncmp(sig, "STUBHAXX", 8) == 0);
 }
 
+u64 returnTo(u64 currentStub)
+{
+	// UNEO
+	if (NandTitles.IndexOf(0x00010001554E454FULL) > 0)
+		return 0x00010001554E454FULL;
+	// ULNR
+	else if (NandTitles.IndexOf(0x00010001554C4E52ULL) > 0)
+		return 0x00010001554C4E52ULL;
+	// IDCL
+	else if (NandTitles.IndexOf(0x000100014944434CULL) > 0)
+		return 0x000100014944434CULL;
+	// OHBC
+	else if (NandTitles.IndexOf(0x000100014F484243ULL) > 0)
+		return 0x000100014F484243ULL;
+	// LULZ
+	else if (NandTitles.IndexOf(0x000100014C554C5AULL) > 0)
+		return 0x000100014C554C5AULL;
+	// 1.0.7
+	else if (NandTitles.IndexOf(0x00010001AF1BF516ULL) > 0)
+		return 0x00010001AF1BF516ULL;
+	// JODI
+	else if (NandTitles.IndexOf(0x000100014A4F4449ULL) > 0)
+		return 0x000100014A4F4449ULL;
+	// HAXX
+	else if (NandTitles.IndexOf(0x0001000148415858ULL) > 0)
+		return 0x0001000148415858ULL;
+	// System menu
+	else if (!currentStub)
+		return 0x100000002ULL;
+	// Current stub
+	return currentStub;
+}

source/lstub.h

@@ -11,9 +11,6 @@
 //!1 if successful
 s32 Set_Stub(u64 reqID);
 
-//!same as the above function, but expects a type and 4 char channel ID
-s32 Set_Stub_Split(u32 type, const char* reqID);
-
 //load the default HBC stub into memory.  as long as nothing writes to the 0x80001800
 // +0xDC7 memory block it will stay there.  by default it has 0x00010001/JODI.
 void loadStub();
@@ -26,4 +23,7 @@ u64 getStubDest();
 //returns 0 or 1 depending on wether the stub is available
 u8 hbcStubAvailable();
 
+//returns a valid title to return to
+u64 returnTo(u64 currentStub);
+
 #endif