Merge pull request #20 from Steveice10/master

Add developer UNITINFO patch.

source/config.c

@@ -26,7 +26,8 @@ void configureCFW(const char *configPath)
                                   "( ) Use second EmuNAND as default",
                                   "( ) Show current NAND in System Settings",
                                   "( ) Show GBA boot screen in patched AGB_FIRM",
-                                  "( ) Enable splash screen with no screen-init" };
+                                  "( ) Enable splash screen with no screen-init",
+                                  "( ) Use developer UNITINFO" };
 
     u32 optionsAmount = sizeof(optionsText) / sizeof(char *);
 
@@ -146,4 +147,4 @@ void configureCFW(const char *configPath)
     //Reboot
     i2cWriteRegister(I2C_DEV_MCU, 0x20, 1 << 2);
     while(1);
-}
+}

source/config.h

@@ -13,4 +13,4 @@
 
 extern u32 config; 
 
-void configureCFW(const char *configPath);
+void configureCFW(const char *configPath);

source/firm.c

@@ -271,6 +271,15 @@ static inline void patchNativeFirm(u32 nandType, u32 emuHeader, u32 a9lhInstalle
     *(u16 *)sigOffset2 = sigPatch[0];
     *((u16 *)sigOffset2 + 1) = sigPatch[1];
 
+    if(CONFIG(7, 1))
+    {
+        //Apply UNITINFO patch
+        u32 unitInfoOffset;
+
+        getUnitInfoValueSet(arm9Section, section[2].size, &unitInfoOffset);
+        *((u8*)unitInfoOffset + 3) = unitInfoPatch[0];
+    }
+
     //Replace the FIRM loader with the injector
     injectLoader();
 }
@@ -416,4 +425,4 @@ static inline void launchFirm(u32 bootType)
 
     //Final jump to arm9 kernel
     ((void (*)())firm->arm9Entry)();
-}
+}

source/patches.c

@@ -19,6 +19,8 @@ const u16 sigPatch[2] = {0x2000, 0x4770};
 
 const u16 writeBlock[2] = {0x2000, 0x46C0};
 
+const u8 unitInfoPatch[1] = {0xE3};
+
 /**************************************************
 *                   Functions
 **************************************************/
@@ -73,4 +75,12 @@ void getLoader(u8 *pos, u32 size, u32 *loaderOffset, u32 *loaderSize)
 
     *loaderOffset = (u32)off - 0x200;
     *loaderSize = *(u32 *)(off - 0xFC) * 0x200;
-}
+}
+
+void getUnitInfoValueSet(u8 *pos, u32 size, u32 *off)
+{
+    //Look for UNITINFO value being set
+    const u8 pattern[] = {0x01, 0x10, 0xA0, 0x13};
+
+    *off = (u32)memsearch(pos, pattern, size, 4);
+}

source/patches.h

@@ -15,6 +15,7 @@ const u32 mpuPatch[3];
 const u16 nandRedir[2];
 const u16 sigPatch[2];
 const u16 writeBlock[2];
+const u8 unitInfoPatch[1];
 
 /**************************************************
 *                   Functions
@@ -24,4 +25,5 @@ void getSigChecks(u8 *pos, u32 size, u32 *off, u32 *off2);
 void *getReboot(u8 *pos, u32 size);
 u32 getfOpen(u8 *proc9Offset, void *rebootOffset);
 u16 *getFirmWrite(u8 *pos, u32 size);
-void getLoader(u8 *pos, u32 size, u32 *loaderOffset, u32 *loaderSize);
+void getLoader(u8 *pos, u32 size, u32 *loaderOffset, u32 *loaderSize);
+void getUnitInfoValueSet(u8 *pos, u32 size, u32* off);