Fix NS version

Comments

exceptions/arm11/source/mainHandler.c

@@ -22,8 +22,6 @@
 
 #include "handlers.h"
 
-#define FINAL_BUFFER    0xE5000000 //0x25000000
-
 #define REG_DUMP_SIZE   4 * 23
 #define CODE_DUMP_SIZE  48
 
@@ -49,7 +47,8 @@ void __attribute__((noreturn)) mainHandler(u32 *regs, u32 type, u32 cpuId)
 
     u32 registerDump[REG_DUMP_SIZE / 4];
     u8 codeDump[CODE_DUMP_SIZE];
-    u8 *final = (u8 *)FINAL_BUFFER;
+    u8 *finalBuffer = cannotAccessVA((void *)0xE5000000) ? (u8 *)0xF5000000 : (u8 *)0xE5000000; //VA for 0x25000000
+    u8 *final = finalBuffer;
 
     while(*(vu32 *)final == 0xDEADC0DE && *((vu32 *)final + 1) == 0xDEADCAFE);
 
@@ -80,8 +79,8 @@ void __attribute__((noreturn)) mainHandler(u32 *regs, u32 type, u32 cpuId)
     u8 *instr = (u8 *)pc + ((cpsr & 0x20) ? 2 : 4) - dumpHeader.codeDumpSize; //Doesn't work well on 32-bit Thumb instructions, but it isn't much of a problem
     dumpHeader.codeDumpSize = copyMemory(codeDump, instr, dumpHeader.codeDumpSize, ((cpsr & 0x20) != 0) ? 2 : 4);
 
-    //Copy register dump and code dump 
-    final = (u8 *)(FINAL_BUFFER + sizeof(ExceptionDumpHeader));
+    //Copy register dump and code dump
+    final = (u8 *)(finalBuffer + sizeof(ExceptionDumpHeader));
     final += copyMemory(final, registerDump, dumpHeader.registerDumpSize, 1);
     final += copyMemory(final, codeDump, dumpHeader.codeDumpSize, 1);
 
@@ -89,13 +88,13 @@ void __attribute__((noreturn)) mainHandler(u32 *regs, u32 type, u32 cpuId)
     dumpHeader.stackDumpSize = copyMemory(final, (const void *)registerDump[13], 0x1000 - (registerDump[13] & 0xFFF), 1);
     final += dumpHeader.stackDumpSize;
 
-    if(!cannotAccessVA((u8 *)0xFFFF9004))
+    if(!cannotAccessVA((void *)0xFFFF9004))
     {
         vu64 *additionalData = (vu64 *)final;
         dumpHeader.additionalDataSize = 16;
         vu8 *currentKCodeSet = *(vu8 **)(*(vu8 **)0xFFFF9004 + CODESET_OFFSET); //currentKProcess + CodeSet
 
-        additionalData[0] = *(vu64 *)(currentKCodeSet + 0x50); //Process name        
+        additionalData[0] = *(vu64 *)(currentKCodeSet + 0x50); //Process name
         additionalData[1] = *(vu64 *)(currentKCodeSet + 0x5C); //Title ID
     }
     else dumpHeader.additionalDataSize = 0;
@@ -103,7 +102,7 @@ void __attribute__((noreturn)) mainHandler(u32 *regs, u32 type, u32 cpuId)
     dumpHeader.totalSize = sizeof(ExceptionDumpHeader) + dumpHeader.registerDumpSize + dumpHeader.codeDumpSize + dumpHeader.stackDumpSize + dumpHeader.additionalDataSize;
 
     //Copy header (actually optimized by the compiler)
-    *(ExceptionDumpHeader *)FINAL_BUFFER = dumpHeader;
+    *(ExceptionDumpHeader *)finalBuffer = dumpHeader;
 
     cleanInvalidateDCacheAndDMB();
     mcuReboot(); //Also contains DCache-cleaning code

exceptions/exception_dump_parser.py

@@ -22,9 +22,9 @@
 #   Notices displayed by works containing it.
 
 __author__    = "TuxSH"
-__copyright__ = "Copyright (c) 2016 TuxSH" 
+__copyright__ = "Copyright (c) 2016 TuxSH"
 __license__   = "GPLv3"
-__version__   = "v1.0"
+__version__   = "v1.2"
 
 """
 Parses Luma3DS exception dumps
@@ -33,6 +33,9 @@ Parses Luma3DS exception dumps
 import argparse
 from struct import unpack_from
 
+import os
+import subprocess
+
 # Source of hexdump: https://gist.github.com/ImmortalPC/c340564823f283fe530b
 # Credits for hexdump go to the original authors
 # Slightly edited by TuxSH
@@ -76,14 +79,14 @@ def hexdump(addr, src, length=16, sep='.' ):
                 text += chr(c)
             else:
                 text += sep
-        result.append(('%08X:  %-'+str(length*(2+1)+1)+'s  |%s|') % (addr + i, hexa, text))
+        result.append(('%08x:  %-'+str(length*(2+1)+1)+'s  |%s|') % (addr + i, hexa, text))
 
     return '\n'.join(result)
-    
+
 
 def makeRegisterLine(A, rA, B, rB):
     return "{0:<15}{1:<20}{2:<15}{3:<20}".format(A, "{0:08x}".format(rA), B, "{0:08x}".format(rB))
-    
+
 handledExceptionNames = ("FIQ", "undefined instruction", "prefetch abort", "data abort")
 registerNames = tuple("r{0}".format(i) for i in range(13)) + ("sp", "lr", "pc", "cpsr") + ("dfsr", "ifsr", "far") + ("fpexc", "fpinst", "fpinst2")
 svcBreakReasons = ("(svcBreak: panic)", "(svcBreak: assertion failed)", "(svcBreak: user-related)")
@@ -96,23 +99,24 @@ if __name__ == "__main__":
     with open(args.filename, "rb") as f: data = f.read()
     if unpack_from("<2I", data) != (0xdeadc0de, 0xdeadcafe):
         raise SystemExit("Invalid file format")
-    
+
     version, processor, exceptionType, _, nbRegisters, codeDumpSize, stackDumpSize, additionalDataSize = unpack_from("<8I", data, 8)
     nbRegisters //= 4
-    
+
     if version < (1 << 16) | 2:
         raise SystemExit("Incompatible format version, please use the appropriate parser.")
-    
+
     registers = unpack_from("<{0}I".format(nbRegisters), data, 40)
-    codeDump = data[40 + 4 * nbRegisters : 40 + 4 * nbRegisters + codeDumpSize]
-    stackOffset = 40 + 4 * nbRegisters + codeDumpSize
+    codeOffset = 40 + 4 * nbRegisters
+    codeDump = data[codeOffset : codeOffset + codeDumpSize]
+    stackOffset = codeOffset + codeDumpSize
     stackDump = data[stackOffset : stackOffset + stackDumpSize]
     addtionalDataOffset = stackOffset + stackDumpSize
     additionalData = data[addtionalDataOffset : addtionalDataOffset + additionalDataSize]
-    
+
     if processor == 9: print("Processor: ARM9")
     else: print("Processor: ARM11 (core {0})".format(processor >> 16))
-    
+
     typeDetailsStr = ""
     if exceptionType == 2:
         if (registers[16] & 0x20) == 0 and codeDumpSize >= 4:
@@ -125,23 +129,41 @@ if __name__ == "__main__":
             instr = unpack_from("<I", codeDump[-4:])[0]
             if instr == 0xdf3c:
                 typeDetailsStr = " " + (svcBreakReasons[registers[0]] if registers[0] < 3 else "(svcBreak)")
-    
+
     elif processor != 9 and (registers[20] & 0x80000000) != 0:
         typeDetailsStr = " (VFP exception)"
-    
+
     print("Exception type: {0}{1}".format("unknown" if exceptionType >= len(handledExceptionNames) else handledExceptionNames[exceptionType], typeDetailsStr))
     if additionalDataSize != 0:
         print("Current process: {0} ({1:016x})".format(additionalData[:8].decode("ascii"), unpack_from("<Q", additionalData, 8)[0]))
-    
+
     print("\nRegister dump:\n")
     for i in range(0, nbRegisters - (nbRegisters % 2), 2):
         if i == 16: print("")
         print(makeRegisterLine(registerNames[i], registers[i], registerNames[i+1], registers[i+1]))
     if nbRegisters % 2 == 1: print("{0:<15}{1:<20}".format(registerNames[nbRegisters - 1], "{0:08x}".format(registers[nbRegisters - 1])))
-    
+
+    thumb = registers[16] & 0x20 != 0
+    addr = registers[15] - codeDumpSize + (2 if thumb else 4)
+
     print("\nCode dump:\n")
-    print(hexdump(registers[15] - codeDumpSize + (4 if (registers[16] & 0x20 == 0) else 2), codeDump))
-    
+
+    objdump_res = ""
+    try:
+        path = os.path.join(os.environ["DEVKITARM"], "bin", "arm-none-eabi-objdump")
+        if os.name == "nt":
+            path = ''.join((path[1], ':', path[2:])).replace('/', '\\')
+
+        objdump_res = subprocess.check_output((
+                                                    path, "-marm", "-b", "binary",
+                                                     "--adjust-vma="+hex(addr - codeOffset), "--start-address="+hex(addr),
+                                                     "--stop-address="+hex(addr + codeDumpSize), "-D", "-z", "-M",
+                                                     "reg-names-std" + (",force-thumb" if thumb else ""), args.filename
+                                             )).decode("utf-8")
+        objdump_res = '\n'.join(objdump_res[objdump_res.find('<.data+'):].split('\n')[1:])
+    except: objdump_res = ""
+
+    print(objdump_res if objdump_res != "" else hexdump(addr, codeDump))
+
     print("\nStack dump:\n")
     print(hexdump(registers[13], stackDump))
-    

haxloader/source/fatfs/diskio.c

@@ -33,9 +33,7 @@ DSTATUS disk_initialize (
 	BYTE pdrv				/* Physical drive nmuber to identify the drive */
 )
 {
-        sdmmc_sdcard_init();
-
-	return RES_OK;
+	return sdmmc_sdcard_init() ? RES_OK : RES_PARERR;
 }
 
 
@@ -52,10 +50,7 @@ DRESULT disk_read (
 	UINT count		/* Number of sectors to read */
 )
 {
-        if(sdmmc_sdcard_readsectors(sector, count, (BYTE *)buff))
-            return RES_PARERR;
-
-        return RES_OK;
+        return (!sdmmc_sdcard_readsectors(sector, count, buff)) ? RES_OK : RES_PARERR;
 }
 
 

haxloader/source/fatfs/sdmmc/sdmmc.c

@@ -274,17 +274,17 @@ static u32 calcSDSize(u8 *csd, int type)
     switch(type)
     {
         case 0:
-            {
-                u32 block_len = csd[9] & 0xF;
-                block_len = 1u << block_len;
-                u32 mult = (u32)((csd[4] >> 7) | ((csd[5] & 3) << 1));
-                mult = 1u << (mult + 2);
-                result = csd[8] & 3;
-                result = (result << 8) | csd[7];
-                result = (result << 2) | (csd[6] >> 6);
-                result = (result + 1) * mult * block_len / 512;
-            }
+        {
+            u32 block_len = csd[9] & 0xF;
+            block_len = 1u << block_len;
+            u32 mult = (u32)((csd[4] >> 7) | ((csd[5] & 3) << 1));
+            mult = 1u << (mult + 2);
+            result = csd[8] & 3;
+            result = (result << 8) | csd[7];
+            result = (result << 2) | (csd[6] >> 6);
+            result = (result + 1) * mult * block_len / 512;
             break;
+        }
         case 1:
             result = csd[7] & 0x3F;
             result = (result << 8) | csd[6];
@@ -482,9 +482,9 @@ void sdmmc_get_cid(bool isNand, u32 *info)
 }
 */
 
-void sdmmc_sdcard_init()
+bool sdmmc_sdcard_init()
 {
     InitSD();
     //Nand_Init();
-    SD_Init();
+    return SD_Init() == 0;
 }

haxloader/source/fatfs/sdmmc/sdmmc.h

@@ -91,7 +91,7 @@ typedef struct mmcdevice {
     u32 res;
 } mmcdevice;
 
-void sdmmc_sdcard_init();
+bool sdmmc_sdcard_init();
 int sdmmc_sdcard_readsectors(u32 sector_no, u32 numsectors, u8 *out);
 //int sdmmc_sdcard_writesectors(u32 sector_no, u32 numsectors, const u8 *in);
 //int sdmmc_nand_readsectors(u32 sector_no, u32 numsectors, u8 *out);

haxloader/source/main.c

@@ -37,7 +37,7 @@ void main(void)
             payload;
         bool foundPayload = false;
 
-        if(f_open(&pathFile, "/luma/path.txt", FA_READ) == FR_OK)
+        if(f_open(&pathFile, "luma/path.txt", FA_READ) == FR_OK)
         {
             u32 pathSize = f_size(&pathFile);
 
@@ -74,10 +74,13 @@ void main(void)
             f_read(&payload, payloadAddress, payloadSize, &read);
             f_close(&payload);
 
-            flushDCacheRange(loaderAddress, loader_bin_size);
-            flushICacheRange(loaderAddress, loader_bin_size);
+            if((u32)read == payloadSize)
+            {
+                flushDCacheRange(loaderAddress, loader_bin_size);
+                flushICacheRange(loaderAddress, loader_bin_size);
 
-            ((void (*)())loaderAddress)();
+                ((void (*)())loaderAddress)();
+            }
         }
     }
 

haxloader/source/start.s

@@ -24,14 +24,14 @@
 .align 4
 .global _start
 _start:
-    @ Change the stack pointer
-    mov sp, #0x27000000
-
     @ Disable interrupts
     mrs r0, cpsr
     orr r0, #0x1C0
     msr cpsr_cx, r0
 
+    @ Change the stack pointer
+    mov sp, #0x27000000
+
     @ Disable caches / MPU
     mrc p15, 0, r0, c1, c0, 0  @ read control register
     bic r0, #(1<<12)           @ - instruction cache disable

injector/source/CFWInfo.h

@@ -9,7 +9,7 @@ typedef struct __attribute__((packed))
     u8 versionMajor;
     u8 versionMinor;
     u8 versionBuild;
-    u8 flags; /* bit 0: dev branch; bit 1: is release */
+    u8 flags;
 
     u32 commitHash;
 

injector/source/ifile.c

@@ -63,4 +63,4 @@ Result IFile_Read(IFile *file, u64 *total, void *buffer, u32 len)
 
   *total = cur;
   return res;
-}
+}

injector/source/loader.c

@@ -155,8 +155,10 @@ static Result load_code(u64 progid, prog_addrs_t *shared, u64 prog_handle, int i
     lzss_decompress((u8 *)shared->text_addr + size);
   }
 
+  u16 progver = g_exheader.codesetinfo.flags.remasterversion[0] | (g_exheader.codesetinfo.flags.remasterversion[1] << 8);
+
   // patch
-  patchCode(progid, (u8 *)shared->text_addr, shared->total_size << 12);
+  patchCode(progid, progver, (u8 *)shared->text_addr, shared->total_size << 12);
 
   return 0;
 }

injector/source/patcher.c

@@ -13,7 +13,7 @@ static void patchMemory(u8 *start, u32 size, const void *pattern, u32 patSize, i
     {
         u8 *found = memsearch(start, pattern, size, patSize);
 
-        if(found == NULL) break;
+        if(found == NULL) svcBreak(USERBREAK_ASSERT);
 
         memcpy(found + offset, replace, repSize);
 
@@ -26,7 +26,7 @@ static void patchMemory(u8 *start, u32 size, const void *pattern, u32 patSize, i
     }
 }
 
-static int fileOpen(IFile *file, FS_ArchiveID archiveId, const char *path, int flags)
+static Result fileOpen(IFile *file, FS_ArchiveID archiveId, const char *path, int flags)
 {
     FS_Path filePath = {PATH_ASCII, strnlen(path, 255) + 1, path},
             archivePath = {PATH_EMPTY, 1, (u8 *)""};
@@ -34,7 +34,16 @@ static int fileOpen(IFile *file, FS_ArchiveID archiveId, const char *path, int f
     return IFile_Open(file, archiveId, archivePath, filePath, flags);
 }
 
-static void loadCFWInfo(void)
+static Result openLumaFile(IFile *file, const char *path)
+{
+    Result res = fileOpen(file, ARCHIVE_SDMC, path, FS_OPEN_READ);
+
+    if((u32)res == 0xC88044AB) res = fileOpen(file, ARCHIVE_NAND_RW, path, FS_OPEN_READ); //Returned if SD is not mounted
+
+    return res;
+}
+
+static inline void loadCFWInfo(void)
 {
     static bool infoLoaded = false;
 
@@ -43,7 +52,7 @@ static void loadCFWInfo(void)
         svcGetCFWInfo(&info);
 
         IFile file;
-        if(BOOTCFG_SAFEMODE != 0 && R_SUCCEEDED(fileOpen(&file, ARCHIVE_SDMC, "/", FS_OPEN_READ))) //Init SD card if SAFE_MODE is being booted
+        if(LOADERFLAG(ISSAFEMODE) && R_SUCCEEDED(fileOpen(&file, ARCHIVE_SDMC, "/", FS_OPEN_READ))) //Init SD card if SAFE_MODE is being booted
             IFile_Close(&file);
 
         infoLoaded = true;
@@ -77,7 +86,7 @@ static void loadCustomVerString(u16 *out, u32 *verStringSize, u32 currentNand)
 
     IFile file;
 
-    if(R_SUCCEEDED(fileOpen(&file, ARCHIVE_SDMC, paths[currentNand], FS_OPEN_READ)))
+    if(R_SUCCEEDED(openLumaFile(&file, paths[currentNand])))
     {
         u64 fileSize;
 
@@ -135,7 +144,7 @@ static void loadTitleCodeSection(u64 progId, u8 *code, u32 size)
 
     IFile file;
 
-    if(R_SUCCEEDED(fileOpen(&file, ARCHIVE_SDMC, path, FS_OPEN_READ)))
+    if(R_SUCCEEDED(openLumaFile(&file, path)))
     {
         u64 fileSize;
 
@@ -143,6 +152,8 @@ static void loadTitleCodeSection(u64 progId, u8 *code, u32 size)
         {
             u64 total;
             IFile_Read(&file, &total, code, fileSize);
+
+            if(total != fileSize) svcBreak(USERBREAK_ASSERT);
         }
 
         IFile_Close(&file);
@@ -159,7 +170,7 @@ static void loadTitleLocaleConfig(u64 progId, u8 *regionId, u8 *languageId)
 
     IFile file;
 
-    if(R_SUCCEEDED(fileOpen(&file, ARCHIVE_SDMC, path, FS_OPEN_READ)))
+    if(R_SUCCEEDED(openLumaFile(&file, path)))
     {
         u64 fileSize;
 
@@ -273,9 +284,9 @@ static void patchCfgGetLanguage(u8 *code, u32 size, u8 languageId, u8 *CFGU_GetC
 
                     if(found) 
                     {
-                        *((u32 *)instr - 1)  = 0xE3A00000 | languageId; // mov    r0, sp                 => mov r0, =languageId
-                        *(u32 *)instr        = 0xE5CD0000;              // bl     CFGU_GetConfigInfoBlk2 => strb r0, [sp]
-                        *((u32 *)instr + 1)  = 0xE3B00000;              // (1 or 2 instructions)         => movs r0, 0             (result code)
+                        *((u32 *)instr - 1)  = 0xE3A00000 | languageId; //mov    r0, sp                 => mov r0, =languageId
+                        *(u32 *)instr        = 0xE5CD0000;              //bl     CFGU_GetConfigInfoBlk2 => strb r0, [sp]
+                        *((u32 *)instr + 1)  = 0xE3B00000;              //(1 or 2 instructions)         => movs r0, 0             (result code)
 
                         //We're done
                         return;
@@ -298,10 +309,10 @@ static void patchCfgGetRegion(u8 *code, u32 size, u8 regionId, u32 CFGUHandleOff
            cmp[2] == cfgSecureInfoGetRegionCmdPattern[2] && *((u16 *)cmdPos + 7) == 0xE59F &&
            *(u32 *)(cmdPos + 20 + *((u16 *)cmdPos + 6)) == CFGUHandleOffset)
         {
-            *((u32 *)cmdPos + 4) = 0xE3A00000 | regionId; // mov    r0, =regionId
-            *((u32 *)cmdPos + 5) = 0xE5C40008;            // strb   r0, [r4, 8]
-            *((u32 *)cmdPos + 6) = 0xE3B00000;            // movs   r0, 0            (result code) ('s' not needed but nvm)
-            *((u32 *)cmdPos + 7) = 0xE5840004;            // str    r0, [r4, 4]
+            *((u32 *)cmdPos + 4) = 0xE3A00000 | regionId; //mov    r0, =regionId
+            *((u32 *)cmdPos + 5) = 0xE5C40008;            //strb   r0, [r4, 8]
+            *((u32 *)cmdPos + 6) = 0xE3B00000;            //movs   r0, 0            (result code) ('s' not needed but nvm)
+            *((u32 *)cmdPos + 7) = 0xE5840004;            //str    r0, [r4, 4]
 
             //The remaining, not patched, function code will do the rest for us
             break;
@@ -309,153 +320,110 @@ static void patchCfgGetRegion(u8 *code, u32 size, u8 regionId, u32 CFGUHandleOff
     }
 }
 
-void patchCode(u64 progId, u8 *code, u32 size)
+void patchCode(u64 progId, u16 progVer, u8 *code, u32 size)
 {
     loadCFWInfo();
 
-    switch(progId)
+    if(((progId == 0x0004003000008F02LL || //USA Home Menu
+         progId == 0x0004003000008202LL || //JPN Home Menu
+         progId == 0x0004003000009802LL) //EUR Home Menu
+        && progVer > 4) ||
+       (progId == 0x000400300000A902LL //KOR Home Menu
+        && progVer > 0) ||
+        progId == 0x000400300000A102LL || //CHN Home Menu
+        progId == 0x000400300000B102LL) //TWN Home Menu
     {
-        case 0x0004003000008F02LL: // USA Menu
-        case 0x0004003000008202LL: // EUR Menu
-        case 0x0004003000009802LL: // JPN Menu
-        case 0x000400300000A102LL: // CHN Menu
-        case 0x000400300000A902LL: // KOR Menu
-        case 0x000400300000B102LL: // TWN Menu
+        static const u8 regionFreePattern[] = {
+            0x0A, 0x0C, 0x00, 0x10
+        },
+                        regionFreePatch[] = {
+            0x01, 0x00, 0xA0, 0xE3, 0x1E, 0xFF, 0x2F, 0xE1
+        };
+
+        //Patch SMDH region checks
+        patchMemory(code, size, 
+            regionFreePattern,
+            sizeof(regionFreePattern), -31, 
+            regionFreePatch, 
+            sizeof(regionFreePatch), 1
+        );
+    }
+
+    else if(progId == 0x0004013000003202LL) //FRIENDS
+    {
+        static const u8 fpdVerPattern[] = {
+            0x42, 0xE0, 0x1E, 0xFF
+        };
+
+        u8 mostRecentFpdVer = 8;
+
+        u8 *off = memsearch(code, fpdVerPattern, size, sizeof(fpdVerPattern));
+
+        if(off == NULL) svcBreak(USERBREAK_ASSERT);
+
+        //Allow online access to work with old friends modules
+        if(off[0xA] < mostRecentFpdVer) off[0xA] = mostRecentFpdVer;
+    }
+
+    else if((progId == 0x0004001000021000LL || //USA MSET
+             progId == 0x0004001000020000LL || //JPN MSET
+             progId == 0x0004001000022000LL || //EUR MSET
+             progId == 0x0004001000026000LL || //CHN MSET
+             progId == 0x0004001000027000LL || //KOR MSET
+             progId == 0x0004001000028000LL) //TWN MSET
+            && CONFIG(PATCHVERSTRING)) 
+    {
+        static const u16 verPattern[] = u"Ve";
+        static u16 *verString;
+        u32 verStringSize = 0,
+        currentNand = BOOTCFG_NAND;
+
+        u16 customVerString[19];
+        loadCustomVerString(customVerString, &verStringSize, currentNand);
+
+        if(verStringSize != 0) verString = customVerString;
+        else
         {
-            static const u8 regionFreePattern[] = {
-                0x00, 0x00, 0x55, 0xE3, 0x01, 0x10, 0xA0
-            };
-            static const u8 regionFreePatch[] = {
-                0x01, 0x00, 0xA0, 0xE3, 0x1E, 0xFF, 0x2F, 0xE1
-            };
+            verStringSize = 8;
+            u32 currentFirm = BOOTCFG_FIRM;
 
-            //Patch SMDH region checks
-            patchMemory(code, size, 
-                regionFreePattern, 
-                sizeof(regionFreePattern), -16, 
-                regionFreePatch, 
-                sizeof(regionFreePatch), 1
-            );
+            static u16 *verStringsNands[] = { u" Sys",
+                                              u" Emu",
+                                              u"Emu2",
+                                              u"Emu3",
+                                              u"Emu4" },
 
-            break;
+                       *verStringsEmuSys[] = { u"EmuS",
+                                               u"Em2S",
+                                               u"Em3S",
+                                               u"Em4S" },
+
+                       *verStringsSysEmu[] = { u"SysE",
+                                               u"SyE2",
+                                               u"SyE3",
+                                               u"SyE4" };
+
+            verString = (currentFirm != 0) == (currentNand != 0) ? verStringsNands[currentNand] :
+                                              (!currentNand ? verStringsSysEmu[currentFirm - 1] : verStringsEmuSys[currentNand - 1]);
         }
 
-        case 0x0004013000002C02LL: // NIM
-        {
-            static const u8 blockAutoUpdatesPattern[] = {
-                0x25, 0x79, 0x0B, 0x99
-            };
-            static const u8 blockAutoUpdatesPatch[] = {
-                0xE3, 0xA0
-            };
+        //Patch Ver. string
+        patchMemory(code, size,
+            verPattern,
+            sizeof(verPattern) - 2, 0,
+            verString,
+            verStringSize, 1
+        );
+    }
 
-            //Block silent auto-updates
-            patchMemory(code, size, 
-                blockAutoUpdatesPattern, 
-                sizeof(blockAutoUpdatesPattern), 0, 
-                blockAutoUpdatesPatch, 
-                sizeof(blockAutoUpdatesPatch), 1
-            );
-
-            //Apply only if the user booted with R
-            if((BOOTCFG_NAND != 0) != (BOOTCFG_FIRM != 0))
-            {
-                static const u8 skipEshopUpdateCheckPattern[] = {
-                    0x30, 0xB5, 0xF1, 0xB0
-                };
-                static const u8 skipEshopUpdateCheckPatch[] = {
-                    0x00, 0x20, 0x08, 0x60, 0x70, 0x47
-                };
-
-                //Skip update checks to access the EShop
-                patchMemory(code, size, 
-                    skipEshopUpdateCheckPattern, 
-                    sizeof(skipEshopUpdateCheckPattern), 0, 
-                    skipEshopUpdateCheckPatch, 
-                    sizeof(skipEshopUpdateCheckPatch), 1
-                );
-            }
-
-            break;
-        }
-
-        case 0x0004013000003202LL: // FRIENDS
-        {
-            static const u8 fpdVerPattern[] = {
-                0xE0, 0x1E, 0xFF, 0x2F, 0xE1, 0x01, 0x01
-            };
-
-            u8 mostRecentFpdVer = 7;
-
-            u8 *fpdVer = memsearch(code, fpdVerPattern, size, sizeof(fpdVerPattern));
-
-            //Allow online access to work with old friends modules
-            if(fpdVer != NULL && fpdVer[9] < mostRecentFpdVer) fpdVer[9] = mostRecentFpdVer;
-
-            break;
-        }
-        
-        case 0x0004001000021000LL: // USA MSET
-        case 0x0004001000020000LL: // JPN MSET
-        case 0x0004001000022000LL: // EUR MSET
-        case 0x0004001000026000LL: // CHN MSET
-        case 0x0004001000027000LL: // KOR MSET
-        case 0x0004001000028000LL: // TWN MSET
-        {
-            if(CONFIG(PATCHVERSTRING))
-            {
-                static const u16 verPattern[] = u"Ver.";
-                static u16 *verString;
-                u32 verStringSize = 0;
-                u32 currentNand = BOOTCFG_NAND;
-
-                u16 customVerString[19];
-                loadCustomVerString(customVerString, &verStringSize, currentNand);
-
-                if(verStringSize != 0) verString = customVerString;
-                else
-                {
-                    verStringSize = 8;
-                    u32 currentFirm = BOOTCFG_FIRM;
-
-                    static u16 *verStringsNands[] = { u" Sys",
-                                                      u" Emu",
-                                                      u"Emu2",
-                                                      u"Emu3",
-                                                      u"Emu4" },
-
-                               *verStringsEmuSys[] = { u"EmuS",
-                                                       u"Em2S",
-                                                       u"Em3S",
-                                                       u"Em4S" },
-
-                               *verStringsSysEmu[] = { u"SysE",
-                                                       u"SyE2",
-                                                       u"SyE3",
-                                                       u"SyE4" };
-
-                    verString = (currentFirm != 0) == (currentNand != 0) ? verStringsNands[currentNand] :
-                                                                           (!currentNand ? verStringsSysEmu[currentFirm - 1] : verStringsEmuSys[currentNand - 1]);
-                }
-
-                //Patch Ver. string
-                patchMemory(code, size,
-                    verPattern,
-                    sizeof(verPattern) - 2, 0,
-                    verString,
-                    verStringSize, 1
-                );
-            }
-
-            break;
-        }
-
-        case 0x0004013000008002LL: // NS
+    else if(progId == 0x0004013000008002LL) //NS
+    {
+        if(progVer > 4)
         {
             static const u8 stopCartUpdatesPattern[] = {
                 0x0C, 0x18, 0xE1, 0xD8
-            };
-            static const u8 stopCartUpdatesPatch[] = {
+            },
+                            stopCartUpdatesPatch[] = {
                 0x0B, 0x18, 0x21, 0xC8
             };
 
@@ -466,166 +434,148 @@ void patchCode(u64 progId, u8 *code, u32 size)
                 stopCartUpdatesPatch,
                 sizeof(stopCartUpdatesPatch), 2
             );
+        }
 
+        if(LOADERFLAG(ISN3DS))
+        {
             u32 cpuSetting = MULTICONFIG(NEWCPU);
 
             if(cpuSetting != 0)
             {
                 static const u8 cfgN3dsCpuPattern[] = {
-                    0x00, 0x40, 0xA0, 0xE1, 0x07
+                    0x0C, 0x00, 0x94, 0x15
                 };
 
-                u32 *cfgN3dsCpuLoc = (u32 *)memsearch(code, cfgN3dsCpuPattern, size, sizeof(cfgN3dsCpuPattern));
+                u32 *off = (u32 *)memsearch(code, cfgN3dsCpuPattern, size, sizeof(cfgN3dsCpuPattern));
+
+                if(off == NULL) svcBreak(USERBREAK_ASSERT);
 
                 //Patch N3DS CPU Clock and L2 cache setting
-                if(cfgN3dsCpuLoc != NULL)
-                {
-                    *(cfgN3dsCpuLoc + 1) = 0xE1A00000;
-                    *(cfgN3dsCpuLoc + 8) = 0xE3A00000 | cpuSetting;
-                }
+                *(off - 4) = 0xE1A00000;
+                *(off + 3) = 0xE3A00000 | cpuSetting;
             }
-
-            break;
         }
+    }
 
-        case 0x0004013000001702LL: // CFG
+    else if(progId == 0x0004013000001702LL) //CFG
+    {
+        static const u8 secureinfoSigCheckPattern[] = {
+            0x06, 0x46, 0x10, 0x48
+        },
+                        secureinfoSigCheckPatch[] = {
+            0x00, 0x26
+        };
+
+        //Disable SecureInfo signature check
+        patchMemory(code, size, 
+            secureinfoSigCheckPattern, 
+            sizeof(secureinfoSigCheckPattern), 0, 
+            secureinfoSigCheckPatch, 
+            sizeof(secureinfoSigCheckPatch), 1
+        );
+
+        if(secureInfoExists())
         {
-            static const u8 secureinfoSigCheckPattern[] = {
-                0x06, 0x46, 0x10, 0x48
-            };
-            static const u8 secureinfoSigCheckPatch[] = {
-                0x00, 0x26
-            };
+            static const u16 secureinfoFilenamePattern[] = u"SecureInfo_",
+                             secureinfoFilenamePatch[] = u"C";
 
-            //Disable SecureInfo signature check
+            //Use SecureInfo_C
             patchMemory(code, size, 
-                secureinfoSigCheckPattern, 
-                sizeof(secureinfoSigCheckPattern), 0, 
-                secureinfoSigCheckPatch, 
-                sizeof(secureinfoSigCheckPatch), 1
+                secureinfoFilenamePattern, 
+                sizeof(secureinfoFilenamePattern) - 2,
+                sizeof(secureinfoFilenamePattern) - 2, 
+                secureinfoFilenamePatch, 
+                sizeof(secureinfoFilenamePatch) - 2, 2
             );
-
-            if(secureInfoExists())
-            {
-                static const u16 secureinfoFilenamePattern[] = u"SecureInfo_";
-                static const u16 secureinfoFilenamePatch[] = u"C";
-
-                //Use SecureInfo_C
-                patchMemory(code, size, 
-                    secureinfoFilenamePattern, 
-                    sizeof(secureinfoFilenamePattern) - 2,
-                    sizeof(secureinfoFilenamePattern) - 2, 
-                    secureinfoFilenamePatch, 
-                    sizeof(secureinfoFilenamePatch) - 2, 2
-                );
-            }
-
-            break;
         }
+    }
         
-        case 0x0004013000003702LL: // RO
+    else if(progId == 0x0004013000003702LL && progVer > 0) //RO
+    {
+        static const u8 sigCheckPattern[] = {
+            0x20, 0xA0, 0xE1, 0x8B
+        },
+                        sha256ChecksPattern1[] = {
+            0xE1, 0x30, 0x40, 0x2D
+        },
+                        sha256ChecksPattern2[] = {
+            0x2D, 0xE9, 0x01, 0x70
+        },
+                        stub[] = {
+            0x00, 0x00, 0xA0, 0xE3, 0x1E, 0xFF, 0x2F, 0xE1 //mov r0, #0; bx lr
+        };
+
+        //Disable CRR0 signature (RSA2048 with SHA256) check
+        patchMemory(code, size, 
+            sigCheckPattern, 
+            sizeof(sigCheckPattern), -9, 
+            stub,
+            sizeof(stub), 1
+        );
+
+        //Disable CRO0/CRR0 SHA256 hash checks (section hashes, and hash table)
+        patchMemory(code, size, 
+            sha256ChecksPattern1, 
+            sizeof(sha256ChecksPattern1), 1, 
+            stub,
+            sizeof(stub), 1
+        );
+
+        patchMemory(code, size, 
+            sha256ChecksPattern2, 
+            sizeof(sha256ChecksPattern2), -2, 
+            stub,
+            sizeof(stub), 1
+        );
+    }
+
+    else if(progId == 0x0004003000008A02LL && MULTICONFIG(DEVOPTIONS) == 1) //ErrDisp
+    {
+        static const u8 unitinfoCheckPattern1[] = { 
+            0x00, 0xD0, 0xE5, 0xDB
+        },
+                        unitinfoCheckPattern2[] = {
+            0x14, 0x00, 0xD0, 0xE5, 0x01
+        },
+                        unitinfoCheckPatch[] = {
+            0x00, 0x00, 0xA0, 0xE3
+        };
+
+        patchMemory(code, size, 
+            unitinfoCheckPattern1, 
+            sizeof(unitinfoCheckPattern1), -1, 
+            unitinfoCheckPatch, 
+            sizeof(unitinfoCheckPatch), 1
+        );
+
+        patchMemory(code, size, 
+            unitinfoCheckPattern2, 
+            sizeof(unitinfoCheckPattern2), 0,
+            unitinfoCheckPatch, 
+            sizeof(unitinfoCheckPatch), 3
+        );
+    }
+
+    else if(CONFIG(USELANGEMUANDCODE) && (u32)((progId & 0xFFFFFFF000000000LL) >> 0x24) == 0x0004000)
+    {
+        //External .code section loading
+        loadTitleCodeSection(progId, code, size);
+
+        //Language emulation
+        u8 regionId = 0xFF,
+           languageId = 0xFF;
+        loadTitleLocaleConfig(progId, &regionId, &languageId);
+
+        if(regionId != 0xFF || regionId != 0xFF)
         {
-            static const u8 sigCheckPattern[] = {
-                0x30, 0x40, 0x2D, 0xE9, 0x02
-            };
-            static const u8 sha256ChecksPattern1[] = {
-                0x30, 0x40, 0x2D, 0xE9, 0x24
-            };
-            static const u8 sha256ChecksPattern2[] = {
-                0xF8, 0x4F, 0x2D, 0xE9, 0x01
-            };
-            
-            static const u8 stub[] = {
-                0x00, 0x00, 0xA0, 0xE3, 0x1E, 0xFF, 0x2F, 0xE1 // mov r0, #0; bx lr
-            };
-            
-            //Disable CRR0 signature (RSA2048 with SHA256) check
-            patchMemory(code, size, 
-                sigCheckPattern, 
-                sizeof(sigCheckPattern), 0, 
-                stub,
-                sizeof(stub), 1
-            );
-            
-            //Disable CRO0/CRR0 SHA256 hash checks (section hashes, and hash table)
-            patchMemory(code, size, 
-                sha256ChecksPattern1, 
-                sizeof(sha256ChecksPattern1), 0, 
-                stub,
-                sizeof(stub), 1
-            );
-            
-            patchMemory(code, size, 
-                sha256ChecksPattern2, 
-                sizeof(sha256ChecksPattern2), 0, 
-                stub,
-                sizeof(stub), 1
-            );
-            
-            break;
-        }
+            u32 CFGUHandleOffset;
+            u8 *CFGU_GetConfigInfoBlk2_endPos = getCfgOffsets(code, size, &CFGUHandleOffset);
 
-        case 0x0004003000008A02LL: // ErrDisp
-        {
-            if(MULTICONFIG(DEVOPTIONS) == 1)
+            if(CFGU_GetConfigInfoBlk2_endPos != NULL)
             {
-                static const u8 unitinfoCheckPattern1[] = { 
-                    0x14, 0x00, 0xD0, 0xE5, 0xDB
-                };
-
-                static const u8 unitinfoCheckPattern2[] = {
-                    0x14, 0x00, 0xD0, 0xE5, 0x01
-                } ;
-
-                static const u8 unitinfoCheckPatch[] = {
-                    0x00, 0x00, 0xA0, 0xE3
-                } ;
-
-                patchMemory(code, size, 
-                    unitinfoCheckPattern1, 
-                    sizeof(unitinfoCheckPattern1), 0, 
-                    unitinfoCheckPatch, 
-                    sizeof(unitinfoCheckPatch), 1
-                );
-
-                patchMemory(code, size, 
-                    unitinfoCheckPattern2, 
-                    sizeof(unitinfoCheckPattern2), 0,
-                    unitinfoCheckPatch, 
-                    sizeof(unitinfoCheckPatch), 3
-                );
+                if(languageId != 0xFF) patchCfgGetLanguage(code, size, languageId, CFGU_GetConfigInfoBlk2_endPos);
+                if(regionId != 0xFF) patchCfgGetRegion(code, size, regionId, CFGUHandleOffset);
             }
-
-            break;
         }
-
-        default:
-            if(CONFIG(USELANGEMUANDCODE))
-            {
-                if((u32)((progId & 0xFFFFFFF000000000LL) >> 0x24) == 0x0004000)
-                {
-                    //External .code section loading
-                    loadTitleCodeSection(progId, code, size);
-
-                    //Language emulation
-                    u8 regionId = 0xFF,
-                       languageId = 0xFF;
-                    loadTitleLocaleConfig(progId, &regionId, &languageId);
-
-                    if(regionId != 0xFF || regionId != 0xFF)
-                    {
-                        u32 CFGUHandleOffset;
-                        u8 *CFGU_GetConfigInfoBlk2_endPos = getCfgOffsets(code, size, &CFGUHandleOffset);
-
-                        if(CFGU_GetConfigInfoBlk2_endPos != NULL)
-                        {
-                            if(languageId != 0xFF) patchCfgGetLanguage(code, size, languageId, CFGU_GetConfigInfoBlk2_endPos);
-                            if(regionId != 0xFF) patchCfgGetRegion(code, size, regionId, CFGUHandleOffset);
-                        }
-                    }
-                }
-            }
-
-        break;
     }
 }

injector/source/patcher.h

@@ -2,15 +2,15 @@
 
 #include <3ds/types.h>
 
-#define CONFIG(a)        (((info.config >> (a + 21)) & 1) != 0)
-#define MULTICONFIG(a)   ((info.config >> (a * 2 + 9)) & 3)
+#define CONFIG(a)        (((info.config >> (a + 20)) & 1) != 0)
+#define MULTICONFIG(a)   ((info.config >> (a * 2 + 8)) & 3)
 #define BOOTCONFIG(a, b) ((info.config >> a) & b)
+#define LOADERFLAG(a)    ((info.flags >> (a + 4)) & 1) != 0
 
 #define BOOTCFG_NAND         BOOTCONFIG(0, 7)
 #define BOOTCFG_FIRM         BOOTCONFIG(3, 7)
 #define BOOTCFG_A9LH         BOOTCONFIG(6, 1)
 #define BOOTCFG_NOFORCEFLAG  BOOTCONFIG(7, 1)
-#define BOOTCFG_SAFEMODE     BOOTCONFIG(8, 1)
 
 enum multiOptions
 {
@@ -26,7 +26,7 @@ enum singleOptions
 {
     AUTOBOOTSYS = 0,
     USESYSFIRM,
-    LOADSDFIRMSANDMODULES,
+    LOADEXTFIRMSANDMODULES,
     USECUSTOMPATH,
     USELANGEMUANDCODE,
     PATCHVERSTRING,
@@ -34,4 +34,10 @@ enum singleOptions
     PATCHACCESS
 };
 
-void patchCode(u64 progId, u8 *code, u32 size);
+enum flags
+{
+    ISN3DS = 0,
+    ISSAFEMODE
+};
+
+void patchCode(u64 progId, u16 progVer, u8 *code, u32 size);

loader/linker.ld

@@ -1,7 +1,7 @@
 ENTRY(_start)
 SECTIONS
 {
-    . = 0x24FFFF00;
+    . = 0x24FFFE00;
     .text.start : { *(.text.start) }
     .text : { *(.text) }
     .data : { *(.data) }

loader/source/cache.s

@@ -25,11 +25,13 @@
 .global flushCaches
 .type flushCaches, %function
 flushCaches:
-    @ Clean and flush data cache
+    @ Clean and flush both the data cache and instruction caches
+    
     @ Adpated from http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0155a/ch03s03s05.html ,
     @ and https://github.com/gemarcano/libctr9_io/blob/master/src/ctr_system_ARM.c#L39 as well
     @ Note: ARM's example is actually for a 8KB DCache (which is what the 3DS has)
-    @ Implemented in bootROM at address 0xffff0830
+    
+    @ Implemented in bootROM at addresses 0xffff0830 (DCache) and 0xffff0ab4 (ICache)
 
     mov r1, #0                          @ segment counter
     outer_loop:

patches/emunand.s

@@ -1,46 +1,48 @@
+; Code by Normmatt
+
 .arm.little
 
 .create "build/emunand.bin", 0
 .arm
-nand_sd:
-    ; Original code that still needs to be executed.
+    ; Original code that still needs to be executed
     mov r4, r0
     mov r5, r1
     mov r7, r2
     mov r6, r3
-    ; End.
+    ; End
 
-    ; If we're already trying to access the SD, return.
+    ; If we're already trying to access the SD, return
     ldr r2, [r0, #4]
     ldr r1, [sdmmc]
     cmp r2, r1
-    beq nand_sd_ret
+    beq out
 
-    str r1, [r0, #4]  ; Set object to be SD
-    ldr r2, [r0, #8]  ; Get sector to read
-    cmp r2, #0  ; For GW compatibility, see if we're trying to read the ncsd header (sector 0)
+    str r1, [r0, #4] ; Set object to be SD
+    ldr r2, [r0, #8] ; Get sector to read
+    cmp r2, #0 ; For GW compatibility, see if we're trying to read the ncsd header (sector 0)
 
     ldr r3, [nand_offset]
-    add r2, r3  ; Add the offset to the NAND in the SD.
+    add r2, r3 ; Add the offset to the NAND in the SD
 
     ldreq r3, [ncsd_header_offset]
-    addeq r2, r3  ; If we're reading the ncsd header, add the offset of that sector.
+    addeq r2, r3 ; If we're reading the ncsd header, add the offset of that sector
 
-    str r2, [r0, #8]  ; Store sector to read
+    str r2, [r0, #8] ; Store sector to read
 
-    nand_sd_ret:
+    out:
         ; Restore registers.
         mov r1, r5
         mov r2, r7
         mov r3, r6
 
         ; Return 4 bytes behind where we got called,
-        ;   due to the offset of this function being stored there.
+        ; due to the offset of this function being stored there
         mov r0, lr
         add r0, #4
         bx r0
+
 .pool
 sdmmc:	                .ascii "SDMC"
-nand_offset:		.ascii "NAND"       ; for rednand this should be 1
-ncsd_header_offset:	.ascii "NCSD"       ; depends on nand manufacturer + emunand type (GW/RED)
+nand_offset:		.ascii "NAND" ; For rednand this should be 1
+ncsd_header_offset:	.ascii "NCSD" ; Depends on nand manufacturer + emunand type (GW/RED)
 .close

patches/k11modules.s

@@ -20,7 +20,7 @@
 ;   Notices displayed by works containing it.
 ;
 
-; This is mainly Subv's code, big thanks to him.
+; Code originally from Subv
 
 .arm.little
 
@@ -35,85 +35,71 @@
     ; Register contents:
     ; r4: Pointer to a pointer to the exheader of the current NCCH
     ; r6: Constant 0
-    ; SP + 0x80 - 0x7C: Pointer to the memory location where the NCCH text was loaded
+    ; SP + 4: Pointer to the memory location where the NCCH text was loaded
 
-    ; Save the value of sp
-    mov r0, sp
-    ; Save the value of all registers
-    push {r0-r12}
+    ; Execute the instruction we overwrote in our detour
+    ldr r0, [r4]
 
-    ldr r0, [r0, #(0x80 - 0x7C)] ; Load the .text address
-    ldr r7, [r4]
-    ldr r2, [r7, #0x18]          ; Load the size of the .text
-    ldr r8, [r7, #0x200]         ; Load the low title id of the current NCCH
-    mov r5, r0
-    add r11, r5, r2              ; Max bounds of the memory region
+    ; Save the value of the register we use
+    push {r0-r4}
 
-    ldr r9, =0x00001002  ; Low title id of the sm module
-    cmp r8, r9           ; Compare the low title id to the id of the sm module
-    bne fs_patch         ; Skip if they're not the same
+    ldr r1, [sp, #24]    ; Load the .text address
+    ldr r2, [r0, #0x200] ; Load the low title id of the current NCCH
+    ldr r0, [r0, #0x18]  ; Load the size of the .text
+    add r0, r1, r0       ; Max bounds of the memory region
+
+    ldr r3, =0x1002 ; Low title id of the sm module
+    cmp r2, r3 ; Compare the low title id to the id of the sm module
+    bne fs_patch ; Skip if they're not the same
+
+    ldr r2, =0xE1A01006 ; mov r1, r6
 
-    ldr r7, =0xE1A01006   ; mov r1, r6
-    ldr r8, =0xE1A00005   ; mov r0, r5
-    ldr r9, =0xE3500000   ; cmp r0, #0
-    ldr r10, =0xE2850004  ; add r0, r5, #4
-    
     loop:
-        cmp r11, r5
-        blo out         ; Check if we didn't go past the bounds of the memory region
-        ldr r6, [r5]
-        cmp r6, r7
-        ldreq r6, [r5, #4]
-        cmpeq r6, r8
-        ldreq r6, [r5, #12]
-        cmpeq r6, r9
-        ldreq r6, [r5, #24]
-        cmpeq r6, r10
-        moveq r8, r5
-        addne r5, r5, #4
+        cmp r0, r1
+        blo die ; Check if we didn't go past the bounds of the memory region
+        ldr r3, [r1]
+        cmp r3, r2
+        ldreqh r3, [r1, #4]
+        cmpeq r3, #5
+        addne r1, #4
         bne loop
 
-    ; r8 now contains the start address of the pattern we found
-
-    ; Write NOPs to the four instructions we want to patch
-    ldr r9, =0xE320F000   ; nop
-    str r9, [r8, #8]      ; Patch the bl
-    str r9, [r8, #12]     ; Patch the cmp
-    str r9, [r8, #16]     ; Patch the ldreq
-    str r9, [r8, #20]     ; Patch the beq
+    ; r1 now contains the start address of the pattern we found
+    ldr r0, =0xE3A00001 ; mov r0, #1
+    str r0, [r1, #8] ; Patch the bl
     b out
 
     fs_patch: ; patch adapted from BootNTR
-    ldr r9, =0x00001102  ; Low title id of the fs module
-    cmp r8, r9           ; Compare the low title id to the id of the sm module
-    bne out              ; Skip if they're not the same
+        ldr r3, =0x1102 ; Low title id of the fs module
+        cmp r2, r3 ; Compare the low title id to the id of the sm module
+        bne out ; Skip if they're not the same
 
-    ldr r7, =0x4618     ; mov r0, r3
-    ldr r8, =0x3481     ; add r4, #0x81
+        ldr r2, =0x7401 ; strb r1, [r0, #16]
+        ldr r3, =0x2000 ; movs r0, #0
 
-    loop_fs:
-        cmp r11, r5
-        blo out
-        ldrh r6, [r5]
-        cmp r6, r7
-        ldreqh r6, [r5, #2]
-        cmpeq r6, r8
-        subeq r8, r5, #8
-        addne r5, #2
-        bne loop_fs
+        loop_fs:
+            cmp r0, r1
+            blo die
+            ldrh r4, [r1]
+            cmp r4, r2
+            ldreqh r4, [r1, #2]
+            cmpeq r4, r3
+            addeq r1, #8
+            addne r1, #2
+            bne loop_fs
+
+        ; r1 now contains the start address of the pattern we found
+        ldr r0, =0x2001 ; mov r0, #1
+        ldr r2, =0x4770 ; bx lr
+        strh r0, [r1]
+        strh r2, [r1, #2]
 
-    ; r8 now contains the start address of the pattern we found
-    ldr r9, =0x2001     ; mov r0, #1
-    ldr r10, =0x4770    ; bx lr
-    strh r9, [r8]
-    strh r10, [r8, #2]
-    
     out:
-    pop {r0-r12}               ; Restore the registers we used
+        pop {r0-r4} ; Restore the registers we used
+        bx lr ; Jump back to whoever called us
 
-    ldr r0, [r4]               ; Execute the instruction we overwrote in our detour
-
-    bx lr                      ; Jump back to whoever called us
+    die:
+        b die
 
 .pool
 .close

patches/reboot.s

@@ -1,7 +1,10 @@
+; Code originally from delebile and mid-kid
+
 .arm.little
 
-payload_addr equ 0x23F00000   ; Brahma payload address.
-payload_maxsize equ 0x100000  ; Maximum size for the payload (maximum that CakeBrah supports).
+payload_addr equ 0x23F00000   ; Brahma payload address
+payload_maxsize equ 0x100000  ; Maximum size for the payload (maximum that CakeBrah supports)
+sd_notmounted equ 0xC8804465  ; Error code returned when SD is not mounted
 
 .create "build/reboot.bin", 0
 .arm
@@ -25,32 +28,40 @@ payload_maxsize equ 0x100000  ; Maximum size for the payload (maximum that CakeB
         cmp r0, r2
         bne pxi_wait_recv
 
-    ; Open file
-    add r0, r7, #8
-    adr r1, fname
-    mov r2, #1
-    ldr r6, [fopen]
-    orr r6, 1
-    blx r6
+    open_payload:
+        ; Open file
+        add r0, r7, #8
+        adr r1, fname
+        mov r2, #1
+        ldr r6, [fopen]
+        orr r6, 1
+        blx r6
+        cmp r0, #0
+        beq read_payload
+        ldr r2, =sd_notmounted
+        cmp r0, r2
+        bne panic
+        adr r0, fname
+        adr r1, nand_mount
+        mov r2, #8
+        bl memcpy16
+        b open_payload
 
-    ; Read file
-    mov r0, r7
-    adr r1, bytes_read
-    ldr r2, =payload_addr
-    mov r3, payload_maxsize
-    ldr r6, [r7]
-    ldr r6, [r6, #0x28]
-    blx r6
+    read_payload:
+        ; Read file
+        mov r0, r7
+        adr r1, bytes_read
+        ldr r2, =payload_addr
+        ldr r3, =payload_maxsize
+        ldr r6, [r7]
+        ldr r6, [r6, #0x28]
+        blx r6
 
     ; Copy the low TID (in UTF-16) of the wanted firm to the 5th byte of the payload
-    add r0, r8, 0x1A
-    add r1, r0, #0x10
-    ldr r2, =payload_addr + 4
-    copy_TID_low:
-        ldrh r3, [r0], #2
-        strh r3, [r2], #2
-        cmp r0, r1
-        blo copy_TID_low
+    ldr r0, =payload_addr + 4
+    add r1, r8, #0x1A
+    mov r2, #0x10
+    bl memcpy16
 
     ; Set kernel state
     mov r0, #0
@@ -68,28 +79,45 @@ payload_maxsize equ 0x100000  ; Maximum size for the payload (maximum that CakeB
     die:
         b die
 
+    memcpy16:
+        add r2, r0, r2
+        copy_loop:
+            ldrh r3, [r1], #2
+            strh r3, [r0], #2
+            cmp r0, r2
+            blo copy_loop
+        bx lr
+
+    panic:
+        mov r1, r0 ; unused register
+        mov r0, #0
+        swi 0x3C ; svcBreak(USERBREAK_PANIC)
+        b die
+
 bytes_read: .word 0
 fopen: .ascii "OPEN"
 .pool
 fname: .dcw "sdmc:/arm9loaderhax.bin"
        .word 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+.pool
+nand_mount: .dcw "nand"
 
 .align 4
     kernelcode_start:
 
     ; Disable MPU
-    ldr r0, =0x42078  ; alt vector select, enable itcm
+    ldr r0, =0x42078 ; alt vector select, enable itcm
     mcr p15, 0, r0, c1, c0, 0
 
     ; Clean and flush data cache
-    mov r1, #0                          ; segment counter
+    mov r1, #0 ; segment counter
     outer_loop:
-        mov r0, #0                      ; line counter
+        mov r0, #0 ; line counter
 
         inner_loop:
-            orr r2, r1, r0                  ; generate segment and line address
-            mcr p15, 0, r2, c7, c14, 2      ; clean and flush the line
-            add r0, #0x20                   ; increment to next line
+            orr r2, r1, r0 ; generate segment and line address
+            mcr p15, 0, r2, c7, c14, 2 ; clean and flush the line
+            add r0, #0x20 ; increment to next line
             cmp r0, #0x400
             bne inner_loop
 
@@ -97,7 +125,8 @@ fname: .dcw "sdmc:/arm9loaderhax.bin"
         cmp r1, #0
         bne outer_loop
 
-    mcr p15, 0, r1, c7, c10, 4              ; drain write buffer
+    ; Drain write buffer
+    mcr p15, 0, r1, c7, c10, 4
 
     ; Flush instruction cache
     mcr p15, 0, r1, c7, c5, 0

source/3dsheaders.h

@@ -0,0 +1,161 @@
+/*
+*   This file is part of Luma3DS
+*   Copyright (C) 2016 Aurora Wright, TuxSH
+*
+*   This program is free software: you can redistribute it and/or modify
+*   it under the terms of the GNU General Public License as published by
+*   the Free Software Foundation, either version 3 of the License, or
+*   (at your option) any later version.
+*
+*   This program is distributed in the hope that it will be useful,
+*   but WITHOUT ANY WARRANTY; without even the implied warranty of
+*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*   GNU General Public License for more details.
+*
+*   You should have received a copy of the GNU General Public License
+*   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*
+*   Additional Terms 7.b of GPLv3 applies to this file: Requiring preservation of specified
+*   reasonable legal notices or author attributions in that material or in the Appropriate Legal
+*   Notices displayed by works containing it.
+*/
+
+/*
+*   Adapted from 3DBrew and https://github.com/mid-kid/CakesForeveryWan/blob/master/source/headers.h
+*/
+
+typedef struct __attribute__((packed))
+{
+    u32 address;
+    u32 phyRegionSize;
+    u32 size;
+} CodeSetInfo;
+
+typedef struct __attribute__((packed))
+{
+    u32 saveDataSize[2];
+    u32 jumpID[2];
+    u8 reserved[0x30];
+} SystemInfo;
+
+typedef struct __attribute__((packed))
+{
+    char appTitle[8];
+    u8 reserved1[5];
+    u8 flag;
+    u8 remasterVersion[2];
+    CodeSetInfo textCodeSet;
+    u32 stackSize;
+    CodeSetInfo roCodeSet;
+    u8 reserved2[4];
+    CodeSetInfo dataCodeSet;
+    u32 bssSize;
+    char depends[0x180];
+    SystemInfo systemInfo;
+} SystemControlInfo;
+
+typedef struct __attribute__((packed))
+{
+    SystemControlInfo systemControlInfo;
+    u8 aci[0x200];
+    u8 accessDescSig[0x100];
+    u8 ncchPubKey[0x100];
+    u8 aciLim[0x200];
+} ExHeader;
+
+typedef struct __attribute__((packed))
+{
+    u8 sig[0x100]; //RSA-2048 signature of the NCCH header, using SHA-256
+    char magic[4]; //NCCH
+    u32 contentSize; //Media unit
+    u8 partitionId[8];
+    u8 makerCode[2];
+    u16 version;
+    u8 reserved1[4];
+    u8 programID[8];
+    u8 reserved2[0x10];
+    u8 logoHash[0x20]; //Logo Region SHA-256 hash
+    char productCode[0x10];
+    u8 exHeaderHash[0x20]; //Extended header SHA-256 hash
+    u32 exHeaderSize; //Extended header size
+    u32 reserved3;
+    u8 flags[8];
+    u32 plainOffset; //Media unit
+    u32 plainSize; //Media unit
+    u32 logoOffset; //Media unit
+    u32 logoSize; //Media unit
+    u32 exeFsOffset; //Media unit
+    u32 exeFsSize; //Media unit
+    u32 exeFsHashSize; //Media unit
+    u32 reserved4;
+    u32 romFsOffset; //Media unit
+    u32 romFsSize; //Media unit
+    u32 romFsHashSize; //Media unit
+    u32 reserved5;
+    u8 exeFsHash[0x20]; //ExeFS superblock SHA-256 hash
+    u8 romFsHash[0x20]; //RomFS superblock SHA-256 hash
+} Ncch;
+
+typedef struct __attribute__((packed))
+{
+    Ncch ncch;
+    ExHeader exHeader;
+} Cxi;
+
+typedef struct __attribute__((packed))
+{
+    char sigIssuer[0x40];
+    u8 eccPubKey[0x3C];
+    u8 version;
+    u8 caCrlVersion;
+    u8 signerCrlVersion;
+    u8 titleKey[0x10];
+    u8 reserved1;
+    u8 ticketId[8];
+    u8 consoleId[4];
+    u8 titleId[8];
+    u8 reserved2[2];
+    u16 ticketTitleVersion;
+    u8 reserved3[8];
+    u8 licenseType;
+    u8 ticketCommonKeyYIndex; //Ticket common keyY index, usually 0x1 for retail system titles.
+    u8 reserved4[0x2A];
+    u8 unk[4]; //eShop Account ID?
+    u8 reserved5;
+    u8 audit;
+    u8 reserved6[0x42];
+    u8 limits[0x40];
+    u8 contentIndex[0xAC];
+} Ticket;
+
+typedef struct __attribute__((packed))
+{
+    u32 offset;
+    u8 *address;
+    u32 size;
+    u32 procType;
+    u8 hash[0x20];
+} FirmSection;
+
+typedef struct __attribute__((packed))
+{
+    u32 magic;
+    u32 reserved1;
+    u8 *arm11Entry;
+    u8 *arm9Entry;
+    u8 reserved2[0x30];
+    FirmSection section[4];
+} Firm;
+
+typedef struct __attribute__((packed))
+{
+    u8 keyX[0x10];
+    u8 keyY[0x10];
+    u8 ctr[0x10];
+    char size[8];
+    u8 reserved[8];
+    u8 ctlBlock[0x10];
+    char magic[4];
+    u8 reserved2[0xC];
+    u8 slot0x16keyX[0x10];
+} Arm9Bin;

source/config.c

@@ -29,18 +29,23 @@
 #include "buttons.h"
 #include "pin.h"
 
+CfgData configData;
+
 bool readConfig(void)
 {
-    if(fileRead(&configData, CONFIG_PATH, sizeof(CfgData)) != sizeof(CfgData) ||
+    bool ret;
+
+    if(fileRead(&configData, CONFIG_FILE, sizeof(CfgData)) != sizeof(CfgData) ||
        memcmp(configData.magic, "CONF", 4) != 0 ||
        configData.formatVersionMajor != CONFIG_VERSIONMAJOR ||
        configData.formatVersionMinor != CONFIG_VERSIONMINOR)
     {
         configData.config = 0;
-        return false;
+        ret = false;
     }
+    else ret = true;
 
-    return true;
+    return ret;
 }
 
 void writeConfig(ConfigurationStatus needConfig, u32 configTemp)
@@ -57,14 +62,14 @@ void writeConfig(ConfigurationStatus needConfig, u32 configTemp)
         }
 
         //Merge the new options and new boot configuration
-        configData.config = (configData.config & 0xFFFFFE00) | (configTemp & 0x1FF);
+        configData.config = (configData.config & 0xFFFFFF00) | (configTemp & 0xFF);
 
-        if(!fileWrite(&configData, CONFIG_PATH, sizeof(CfgData)))
+        if(!fileWrite(&configData, CONFIG_FILE, sizeof(CfgData)))
             error("Error writing the configuration file");
     }
 }
 
-void configMenu(bool oldPinStatus, u32 oldPinMode)
+void configMenu(bool isSdMode, bool oldPinStatus, u32 oldPinMode)
 {
     const char *multiOptionsText[]  = { "Default EmuNAND: 1( ) 2( ) 3( ) 4( )",
                                         "Screen brightness: 4( ) 3( ) 2( ) 1( )",
@@ -75,8 +80,8 @@ void configMenu(bool oldPinStatus, u32 oldPinMode)
                                       };
 
     const char *singleOptionsText[] = { "( ) Autoboot SysNAND",
-                                        "( ) Use SysNAND FIRM if booting with R (A9LH)",
-                                        "( ) Enable FIRMs and modules loading from SD",
+                                        "( ) Use SysNAND FIRM if booting with R",
+                                        "( ) Enable loading external FIRMs and modules",
                                         "( ) Use custom path",
                                         "( ) Enable region/language emu. and ext. .code",
                                         "( ) Show NAND or user string in System Settings",
@@ -113,7 +118,8 @@ void configMenu(bool oldPinStatus, u32 oldPinMode)
                                           "games.",
 
                                           "Select the developer features.\n\n"
-                                          "\t* 'Off' disables exception handlers.\n"
+                                          "\t* 'Off' disables exception handlers\n"
+                                          "in FIRM.\n"
                                           "\t* 'ErrDisp' displays debug info\n"
                                           "on the 'An error has occurred' screen.\n"
                                           "\t* 'UNITINFO' makes the console be\n"
@@ -144,8 +150,8 @@ void configMenu(bool oldPinStatus, u32 oldPinMode)
                                           "1/2/3/4), also add A if you have\n"
                                           "a matching payload.",
 
-                                          "Enable loading FIRMs and\n"
-                                          "system modules from the SD card.\n\n"
+                                          "Enable loading external FIRMs and\n"
+                                          "system modules.\n\n"
                                           "This isn't needed in most cases.\n\n"
                                           "Refer to the wiki for instructions.",
 
@@ -189,25 +195,36 @@ void configMenu(bool oldPinStatus, u32 oldPinMode)
         u32 posXs[4];
         u32 posY;
         u32 enabled;
+        bool visible;
     } multiOptions[] = {
-        { .posXs = {19, 24, 29, 34} },
-        { .posXs = {21, 26, 31, 36} },
-        { .posXs = {12, 22, 31, 0}  },
-        { .posXs = {14, 19, 24, 29} },
-        { .posXs = {17, 26, 32, 44} },
-        { .posXs = {19, 30, 42, 0}  }
+        { .posXs = {19, 24, 29, 34}, .visible = isSdMode },
+        { .posXs = {21, 26, 31, 36}, .visible = true },
+        { .posXs = {12, 22, 31, 0}, .visible = true  },
+        { .posXs = {14, 19, 24, 29}, .visible = true },
+        { .posXs = {17, 26, 32, 44}, .visible = ISN3DS },
+        { .posXs = {19, 30, 42, 0}, .visible = true  }
     };
 
-    //Calculate the amount of the various kinds of options and pre-select the first single one
-    u32 multiOptionsAmount = sizeof(multiOptions) / sizeof(struct multiOption),
-        singleOptionsAmount = sizeof(singleOptionsText) / sizeof(char *),
-        totalIndexes = multiOptionsAmount + singleOptionsAmount - 1,
-        selectedOption = multiOptionsAmount;
-
     struct singleOption {
         u32 posY;
         bool enabled;
-    } singleOptions[singleOptionsAmount];
+        bool visible;
+    } singleOptions[] = {
+        { .visible = isSdMode },
+        { .visible = isSdMode },
+        { .visible = true },
+        { .visible = true },
+        { .visible = true },
+        { .visible = true },
+        { .visible = true },
+        { .visible = true }
+    };
+
+    //Calculate the amount of the various kinds of options and pre-select the first single one
+    u32 multiOptionsAmount = sizeof(multiOptions) / sizeof(struct multiOption),
+        singleOptionsAmount = sizeof(singleOptions) / sizeof(struct singleOption),
+        totalIndexes = multiOptionsAmount + singleOptionsAmount - 1,
+        selectedOption;
 
     //Parse the existing options
     for(u32 i = 0; i < multiOptionsAmount; i++)
@@ -228,7 +245,7 @@ void configMenu(bool oldPinStatus, u32 oldPinMode)
     //Display all the multiple choice options in white
     for(u32 i = 0; i < multiOptionsAmount; i++)
     {
-        if(!(i == NEWCPU && !isN3DS))
+        if(multiOptions[i].visible)
         {
             multiOptions[i].posY = endPos + SPACING_Y;
             endPos = drawString(multiOptionsText[i], true, 10, multiOptions[i].posY, COLOR_WHITE);
@@ -237,15 +254,22 @@ void configMenu(bool oldPinStatus, u32 oldPinMode)
     }
 
     endPos += SPACING_Y / 2;
-    u32 color = COLOR_RED;
 
     //Display all the normal options in white except for the first one
-    for(u32 i = 0; i < singleOptionsAmount; i++)
+    for(u32 i = 0, color = COLOR_RED; i < singleOptionsAmount; i++)
     {
-        singleOptions[i].posY = endPos + SPACING_Y;
-        endPos = drawString(singleOptionsText[i], true, 10, singleOptions[i].posY, color);
-        if(singleOptions[i].enabled) drawCharacter(selected, true, 10 + SPACING_X, singleOptions[i].posY, color);
-        color = COLOR_WHITE;
+        if(singleOptions[i].visible)
+        {
+            singleOptions[i].posY = endPos + SPACING_Y;
+            endPos = drawString(singleOptionsText[i], true, 10, singleOptions[i].posY, color);
+            if(singleOptions[i].enabled) drawCharacter(selected, true, 10 + SPACING_X, singleOptions[i].posY, color);
+
+            if(color == COLOR_RED)
+            {
+                selectedOption = i + multiOptionsAmount;
+                color = COLOR_WHITE;
+            }
+        }
     }
 
     drawString(optionsDescription[selectedOption], false, 10, 10, COLOR_WHITE);
@@ -266,24 +290,31 @@ void configMenu(bool oldPinStatus, u32 oldPinMode)
             //Remember the previously selected option
             u32 oldSelectedOption = selectedOption;
 
-            switch(pressed)
+            while(true)
             {
-                case BUTTON_UP:
-                    if(!selectedOption) selectedOption = totalIndexes;
-                    else selectedOption = (selectedOption == NEWCPU + 1 && !isN3DS) ? selectedOption - 2 : selectedOption - 1;
-                    break;
-                case BUTTON_DOWN:
-                    if(selectedOption == totalIndexes) selectedOption = 0;
-                    else selectedOption = (selectedOption == NEWCPU - 1 && !isN3DS) ? selectedOption + 2 : selectedOption + 1;
-                    break;
-                case BUTTON_LEFT:
-                    selectedOption = 0;
-                    break;
-                case BUTTON_RIGHT:
-                    selectedOption = totalIndexes;
-                    break;
-                default:
-                    continue;
+                switch(pressed)
+                {
+                    case BUTTON_UP:
+                        selectedOption = !selectedOption ? totalIndexes : selectedOption - 1;
+                        break;
+                    case BUTTON_DOWN:
+                        selectedOption = selectedOption == totalIndexes ? 0 : selectedOption + 1;
+                        break;
+                    case BUTTON_LEFT:
+                        pressed = BUTTON_DOWN;
+                        selectedOption = 0;
+                        break;
+                    case BUTTON_RIGHT:
+                        pressed = BUTTON_UP;
+                        selectedOption = totalIndexes;
+                        break;
+                }
+
+                if(selectedOption < multiOptionsAmount)
+                {
+                    if(multiOptions[selectedOption].visible) break;
+                }
+                else if(singleOptions[selectedOption - multiOptionsAmount].visible) break;
             }
 
             if(selectedOption == oldSelectedOption) continue;
@@ -346,14 +377,14 @@ void configMenu(bool oldPinStatus, u32 oldPinMode)
 
     //Parse and write the new configuration
     for(u32 i = 0; i < multiOptionsAmount; i++)
-        configData.config |= multiOptions[i].enabled << (i * 2 + 9);
+        configData.config |= multiOptions[i].enabled << (i * 2 + 8);
     for(u32 i = 0; i < singleOptionsAmount; i++)
-        configData.config |= (singleOptions[i].enabled ? 1 : 0) << (i + 21);
+        configData.config |= (singleOptions[i].enabled ? 1 : 0) << (i + 20);
 
     u32 newPinMode = MULTICONFIG(PIN);
 
     if(newPinMode != 0) newPin(oldPinStatus && newPinMode == oldPinMode, newPinMode);
-    else if(oldPinStatus) fileDelete(PIN_PATH);
+    else if(oldPinStatus) fileDelete(PIN_FILE);
 
     //Wait for the pressed buttons to change
     while(HID_PAD & PIN_BUTTONS);

source/config.h

@@ -24,19 +24,18 @@
 
 #include "types.h"
 
-#define CONFIG(a)        (((configData.config >> (a + 21)) & 1) != 0)
-#define MULTICONFIG(a)   ((configData.config >> (a * 2 + 9)) & 3)
+#define CONFIG(a)        (((configData.config >> (a + 20)) & 1) != 0)
+#define MULTICONFIG(a)   ((configData.config >> (a * 2 + 8)) & 3)
 #define BOOTCONFIG(a, b) ((configData.config >> a) & b)
 
-#define CONFIG_PATH         "/luma/config.bin"
+#define CONFIG_FILE         "config.bin"
 #define CONFIG_VERSIONMAJOR 1
-#define CONFIG_VERSIONMINOR 6
+#define CONFIG_VERSIONMINOR 7
 
 #define BOOTCFG_NAND         BOOTCONFIG(0, 7)
 #define BOOTCFG_FIRM         BOOTCONFIG(3, 7)
 #define BOOTCFG_A9LH         BOOTCONFIG(6, 1)
 #define BOOTCFG_NOFORCEFLAG  BOOTCONFIG(7, 1)
-#define BOOTCFG_SAFEMODE     BOOTCONFIG(8, 1)
 
 enum multiOptions
 {
@@ -52,7 +51,7 @@ enum singleOptions
 {
     AUTOBOOTSYS = 0,
     USESYSFIRM,
-    LOADSDFIRMSANDMODULES,
+    LOADEXTFIRMSANDMODULES,
     USECUSTOMPATH,
     USELANGEMUANDCODE,
     PATCHVERSTRING,
@@ -60,14 +59,6 @@ enum singleOptions
     PATCHACCESS
 };
 
-typedef struct __attribute__((packed))
-{
-    char magic[4];
-    u16 formatVersionMajor, formatVersionMinor;
-
-    u32 config;
-} CfgData;
-
 typedef enum ConfigurationStatus
 {
     DONT_CONFIGURE = 0,
@@ -75,9 +66,6 @@ typedef enum ConfigurationStatus
     CREATE_CONFIGURATION
 } ConfigurationStatus;
 
-extern CfgData configData;
-extern bool isN3DS;
-
 bool readConfig(void);
 void writeConfig(ConfigurationStatus needConfig, u32 configTemp);
-void configMenu(bool oldPinStatus, u32 oldPinMode);
+void configMenu(bool isSdMode, bool oldPinStatus, u32 oldPinMode);

source/crypto.c

@@ -24,10 +24,13 @@
 *   Crypto libs from http://github.com/b1l1s/ctr
 *   kernel9Loader code originally adapted from https://github.com/Reisyukaku/ReiNand/blob/228c378255ba693133dec6f3368e14d386f2cde7/source/crypto.c#L233
 *   decryptNusFirm code adapted from https://github.com/mid-kid/CakesForeveryWan/blob/master/source/firm.c
+*   ctrNandWrite logic adapted from https://github.com/d0k3/GodMode9/blob/master/source/nand/nand.c
 */
 
 #include "crypto.h"
 #include "memory.h"
+#include "strings.h"
+#include "utils.h"
 #include "fatfs/sdmmc/sdmmc.h"
 
 /****************************************************************
@@ -82,7 +85,7 @@ __asm__\
 
 static void aes_setkey(u8 keyslot, const void *key, u32 keyType, u32 mode)
 {
-    if(keyslot <= 0x03) return; // Ignore TWL keys for now
+    if(keyslot <= 0x03) return; //Ignore TWL keys for now
     u32 *key32 = (u32 *)key;
     *REG_AESCNT = (*REG_AESCNT & ~(AES_CNT_INPUT_ENDIAN | AES_CNT_INPUT_ORDER)) | mode;
     *REG_AESKEYCNT = (*REG_AESKEYCNT >> 6 << 6) | keyslot | AES_KEYCNT_WRITE;
@@ -107,7 +110,7 @@ static void aes_setiv(const void *iv, u32 mode)
     const u32 *iv32 = (const u32 *)iv;
     *REG_AESCNT = (*REG_AESCNT & ~(AES_CNT_INPUT_ENDIAN | AES_CNT_INPUT_ORDER)) | mode;
 
-    // Word order for IV can't be changed in REG_AESCNT and always default to reversed
+    //Word order for IV can't be changed in REG_AESCNT and always default to reversed
     if(mode & AES_INPUT_NORMAL)
     {
         REG_AESCTR[0] = iv32[3];
@@ -131,7 +134,7 @@ static void aes_advctr(void *ctr, u32 val, u32 mode)
     int i;
     if(mode & AES_INPUT_BE)
     {
-        for(i = 0; i < 4; ++i) // Endian swap
+        for(i = 0; i < 4; ++i) //Endian swap
             BSWAP32(ctr32[i]);
     }
 
@@ -146,7 +149,7 @@ static void aes_advctr(void *ctr, u32 val, u32 mode)
 
     if(mode & AES_INPUT_BE)
     {
-        for(i = 0; i < 4; ++i) // Endian swap
+        for(i = 0; i < 4; ++i) //Endian swap
             BSWAP32(ctr32[i]);
     }
 }
@@ -186,7 +189,7 @@ static void aes_batch(void *dst, const void *src, u32 blockCount)
 
     while(rbc)
     {
-        if(wbc && ((*REG_AESCNT & 0x1F) <= 0xC)) // There's space for at least 4 ints
+        if(wbc && ((*REG_AESCNT & 0x1F) <= 0xC)) //There's space for at least 4 ints
         {
             *REG_AESWRFIFO = *src32++;
             *REG_AESWRFIFO = *src32++;
@@ -195,7 +198,7 @@ static void aes_batch(void *dst, const void *src, u32 blockCount)
             wbc--;
         }
 
-        if(rbc && ((*REG_AESCNT & (0x1F << 0x5)) >= (0x4 << 0x5))) // At least 4 ints available for read
+        if(rbc && ((*REG_AESCNT & (0x1F << 0x5)) >= (0x4 << 0x5))) //At least 4 ints available for read
         {
             *dst32++ = *REG_AESRDFIFO;
             *dst32++ = *REG_AESRDFIFO;
@@ -222,24 +225,24 @@ static void aes(void *dst, const void *src, u32 blockCount, void *iv, u32 mode,
 
         blocks = (blockCount >= 0xFFFF) ? 0xFFFF : blockCount;
 
-        // Save the last block for the next decryption CBC batch's iv
+        //Save the last block for the next decryption CBC batch's iv
         if((mode & AES_ALL_MODES) == AES_CBC_DECRYPT_MODE)
         {
             memcpy(iv, src + (blocks - 1) * AES_BLOCK_SIZE, AES_BLOCK_SIZE);
             aes_change_ctrmode(iv, AES_INPUT_BE | AES_INPUT_NORMAL, ivMode);
         }
 
-        // Process the current batch
+        //Process the current batch
         aes_batch(dst, src, blocks);
 
-        // Save the last block for the next encryption CBC batch's iv
+        //Save the last block for the next encryption CBC batch's iv
         if((mode & AES_ALL_MODES) == AES_CBC_ENCRYPT_MODE)
         {
             memcpy(iv, dst + (blocks - 1) * AES_BLOCK_SIZE, AES_BLOCK_SIZE);
             aes_change_ctrmode(iv, AES_INPUT_BE | AES_INPUT_NORMAL, ivMode);
         }
 
-        // Advance counter for CTR mode
+        //Advance counter for CTR mode
         else if((mode & AES_ALL_MODES) == AES_CTR_MODE)
             aes_advctr(iv, blocks, ivMode);
 
@@ -256,6 +259,8 @@ static void sha_wait_idle()
 
 static void sha(void *res, const void *src, u32 size, u32 mode)
 {
+    backupAndRestoreShaHash(false);
+
     sha_wait_idle();
     *REG_SHA_CNT = mode | SHA_CNT_OUTPUT_ENDIAN | SHA_NORMAL_ROUND;
 
@@ -300,6 +305,8 @@ static u32 fatStart;
 static u8 __attribute__((aligned(4))) shaHashBackup[SHA_256_HASH_SIZE];
 static bool didShaHashBackup = false;
 
+FirmwareSource firmSource;
+
 void ctrNandInit(void)
 {
     u8 __attribute__((aligned(4))) cid[AES_BLOCK_SIZE];
@@ -309,7 +316,7 @@ void ctrNandInit(void)
     sha(shaSum, cid, sizeof(cid), SHA_256_MODE);
     memcpy(nandCtr, shaSum, sizeof(nandCtr));
 
-    if(isN3DS)
+    if(ISN3DS)
     {
         u8 __attribute__((aligned(4))) keyY0x5[AES_BLOCK_SIZE] = {0x4D, 0x80, 0x4F, 0x4E, 0x99, 0x90, 0x19, 0x46, 0x13, 0xA2, 0x04, 0xAC, 0x58, 0x44, 0x60, 0xBE};
         aes_setkey(0x05, keyY0x5, AES_KEYY, AES_INPUT_BE | AES_INPUT_NORMAL);
@@ -324,14 +331,14 @@ void ctrNandInit(void)
     }
 }
 
-u32 ctrNandRead(u32 sector, u32 sectorCount, u8 *outbuf)
+int ctrNandRead(u32 sector, u32 sectorCount, u8 *outbuf)
 {
     u8 __attribute__((aligned(4))) tmpCtr[sizeof(nandCtr)];
     memcpy(tmpCtr, nandCtr, sizeof(nandCtr));
     aes_advctr(tmpCtr, ((sector + fatStart) * 0x200) / AES_BLOCK_SIZE, AES_INPUT_BE | AES_INPUT_NORMAL);
 
     //Read
-    u32 result;
+    int result;
     if(firmSource == FIRMWARE_SYSNAND)
         result = sdmmc_nand_readsectors(sector + fatStart, sectorCount, outbuf);
     else
@@ -347,6 +354,33 @@ u32 ctrNandRead(u32 sector, u32 sectorCount, u8 *outbuf)
     return result;
 }
 
+int ctrNandWrite(u32 sector, u32 sectorCount, const u8 *inbuf)
+{
+    u8 *buffer = (u8 *)0x23000000;
+    u32 bufferSize = 0xF00000;
+
+    u8 __attribute__((aligned(4))) tmpCtr[sizeof(nandCtr)];
+    memcpy(tmpCtr, nandCtr, sizeof(nandCtr));
+    aes_advctr(tmpCtr, ((sector + fatStart) * 0x200) / AES_BLOCK_SIZE, AES_INPUT_BE | AES_INPUT_NORMAL);
+    aes_use_keyslot(nandSlot);
+
+    int result = 0;
+    for(u32 tempSector = 0; tempSector < sectorCount && !result; tempSector += bufferSize / 0x200)
+    {
+        u32 tempCount = (bufferSize / 0x200) < (sectorCount - tempSector) ? (bufferSize / 0x200) : (sectorCount - tempSector);
+
+        memcpy(buffer, inbuf + (tempSector * 0x200), tempCount * 0x200);
+
+        //Encrypt
+        aes(buffer, buffer, tempCount * 0x200 / AES_BLOCK_SIZE, tmpCtr, AES_CTR_MODE, AES_INPUT_BE | AES_INPUT_NORMAL);
+
+        //Write
+        result = sdmmc_nand_writesectors(tempSector + sector + fatStart, tempCount, buffer);
+    }
+
+    return result;
+}
+
 void set6x7xKeys(void)
 {
     const u8 __attribute__((aligned(4))) keyX0x25[AES_BLOCK_SIZE] = {0xCE, 0xE7, 0xD8, 0xAB, 0x30, 0xC0, 0x0D, 0xAE, 0x85, 0x0E, 0xF5, 0xE3, 0x82, 0xAC, 0x5A, 0xF3};
@@ -361,47 +395,66 @@ void set6x7xKeys(void)
     memset32((void *)0x01FFCD00, 0, 0x10);
 }
 
-void decryptExeFs(u8 *inbuf)
+bool decryptExeFs(Cxi *cxi)
 {
-    u8 *exeFsOffset = inbuf + *(u32 *)(inbuf + 0x1A0) * 0x200;
-    u32 exeFsSize = *(u32 *)(inbuf + 0x1A4) * 0x200;
-    u8 __attribute__((aligned(4))) ncchCtr[AES_BLOCK_SIZE] = {0};
+    bool isCxi;
 
-    for(u32 i = 0; i < 8; i++)
-        ncchCtr[7 - i] = *(inbuf + 0x108 + i);
-    ncchCtr[8] = 2;
+    if(memcmp(cxi->ncch.magic, "NCCH", 4) == 0)
+    {
+        isCxi = true;
 
-    aes_setkey(0x2C, inbuf, AES_KEYY, AES_INPUT_BE | AES_INPUT_NORMAL);
-    aes_use_keyslot(0x2C);
-    aes(inbuf - 0x200, exeFsOffset, exeFsSize / AES_BLOCK_SIZE, ncchCtr, AES_CTR_MODE, AES_INPUT_BE | AES_INPUT_NORMAL);
+        u8 *exeFsOffset = (u8 *)cxi + (cxi->ncch.exeFsOffset + 1) * 0x200;
+        u32 exeFsSize = (cxi->ncch.exeFsSize - 1) * 0x200;
+        u8 __attribute__((aligned(4))) ncchCtr[AES_BLOCK_SIZE] = {0};
+
+        for(u32 i = 0; i < 8; i++)
+            ncchCtr[7 - i] = cxi->ncch.partitionId[i];
+        ncchCtr[8] = 2;
+
+        aes_setkey(0x2C, cxi, AES_KEYY, AES_INPUT_BE | AES_INPUT_NORMAL);
+        aes_advctr(ncchCtr, 0x200 / AES_BLOCK_SIZE, AES_INPUT_BE | AES_INPUT_NORMAL);
+        aes_use_keyslot(0x2C);
+        aes(cxi, exeFsOffset, exeFsSize / AES_BLOCK_SIZE, ncchCtr, AES_CTR_MODE, AES_INPUT_BE | AES_INPUT_NORMAL);
+    }
+    else isCxi = false;
+
+    return isCxi && memcmp(cxi, "FIRM", 4) == 0;
 }
 
-void decryptNusFirm(const u8 *inbuf, u8 *outbuf, u32 ncchSize)
+bool decryptNusFirm(const Ticket *ticket, Cxi *cxi, u32 ncchSize)
 {
-    const u8 keyY0x3D[AES_BLOCK_SIZE] = {0x0C, 0x76, 0x72, 0x30, 0xF0, 0x99, 0x8F, 0x1C, 0x46, 0x82, 0x82, 0x02, 0xFA, 0xAC, 0xBE, 0x4C};
-    u8 __attribute__((aligned(4))) titleKey[AES_BLOCK_SIZE];
-    u8 __attribute__((aligned(4))) cetkIv[AES_BLOCK_SIZE] = {0};
-    memcpy(titleKey, inbuf + 0x1BF, sizeof(titleKey));
-    memcpy(cetkIv, inbuf + 0x1DC, 8);
+    bool isTicket;
 
-    aes_setkey(0x3D, keyY0x3D, AES_KEYY, AES_INPUT_BE | AES_INPUT_NORMAL);
-    aes_use_keyslot(0x3D);
-    aes(titleKey, titleKey, 1, cetkIv, AES_CBC_DECRYPT_MODE, AES_INPUT_BE | AES_INPUT_NORMAL);
+    if(memcmp(ticket->sigIssuer, "Root", 4) == 0)
+    {
+        isTicket = true;
 
-    u8 __attribute__((aligned(4))) ncchIv[AES_BLOCK_SIZE] = {0};
+        const u8 keyY0x3D[AES_BLOCK_SIZE] = {0x0C, 0x76, 0x72, 0x30, 0xF0, 0x99, 0x8F, 0x1C, 0x46, 0x82, 0x82, 0x02, 0xFA, 0xAC, 0xBE, 0x4C};
+        u8 __attribute__((aligned(4))) titleKey[AES_BLOCK_SIZE];
+        u8 __attribute__((aligned(4))) cetkIv[AES_BLOCK_SIZE] = {0};
+        memcpy(titleKey, ticket->titleKey, sizeof(titleKey));
+        memcpy(cetkIv, ticket->titleId, sizeof(ticket->titleId));
 
-    aes_setkey(0x16, titleKey, AES_KEYNORMAL, AES_INPUT_BE | AES_INPUT_NORMAL);
-    aes_use_keyslot(0x16);
-    aes(outbuf, outbuf, ncchSize / AES_BLOCK_SIZE, ncchIv, AES_CBC_DECRYPT_MODE, AES_INPUT_BE | AES_INPUT_NORMAL);
+        aes_setkey(0x3D, keyY0x3D, AES_KEYY, AES_INPUT_BE | AES_INPUT_NORMAL);
+        aes_use_keyslot(0x3D);
+        aes(titleKey, titleKey, 1, cetkIv, AES_CBC_DECRYPT_MODE, AES_INPUT_BE | AES_INPUT_NORMAL);
 
-    decryptExeFs(outbuf);
+        u8 __attribute__((aligned(4))) ncchIv[AES_BLOCK_SIZE] = {0};
+
+        aes_setkey(0x16, titleKey, AES_KEYNORMAL, AES_INPUT_BE | AES_INPUT_NORMAL);
+        aes_use_keyslot(0x16);
+        aes(cxi, cxi, ncchSize / AES_BLOCK_SIZE, ncchIv, AES_CBC_DECRYPT_MODE, AES_INPUT_BE | AES_INPUT_NORMAL);
+    }
+    else isTicket = false;
+
+    return isTicket && decryptExeFs(cxi);
 }
 
-void kernel9Loader(u8 *arm9Section)
+void kernel9Loader(Arm9Bin *arm9Section)
 {
     //Determine the kernel9loader version
     u32 k9lVersion;
-    switch(arm9Section[0x53])
+    switch(arm9Section->magic[3])
     {
         case 0xFF:
             k9lVersion = 0;
@@ -414,10 +467,10 @@ void kernel9Loader(u8 *arm9Section)
             break;
     }
 
-    u32 startOfArm9Bin = *(u32 *)(arm9Section + 0x800);
-    bool needToDecrypt = startOfArm9Bin != 0x47704770 && startOfArm9Bin != 0xB0862000;
+    u32 *startOfArm9Bin = (u32 *)((u8 *)arm9Section + 0x800);
+    bool needToDecrypt = *startOfArm9Bin != 0x47704770 && *startOfArm9Bin != 0xB0862000;
 
-    if(!isDevUnit && (k9lVersion == 2 || (k9lVersion == 1 && needToDecrypt)))
+    if(!ISDEVUNIT && (k9lVersion == 2 || (k9lVersion == 1 && needToDecrypt)))
     {
         //Set 0x11 keyslot
         const u8 __attribute__((aligned(4))) key1[AES_BLOCK_SIZE] = {0x07, 0x29, 0x44, 0x38, 0xF8, 0xC9, 0x75, 0x93, 0xAA, 0x0E, 0x4A, 0xB4, 0xAE, 0x84, 0xC1, 0xD8};
@@ -437,28 +490,24 @@ void kernel9Loader(u8 *arm9Section)
             //Set keyX
             u8 __attribute__((aligned(4))) keyX[AES_BLOCK_SIZE];
             aes_use_keyslot(0x11);
-            aes(keyX, arm9Section + 0x60, 1, NULL, AES_ECB_DECRYPT_MODE, 0);
+            aes(keyX, arm9Section->slot0x16keyX, 1, NULL, AES_ECB_DECRYPT_MODE, 0);
             aes_setkey(0x16, keyX, AES_KEYX, AES_INPUT_BE | AES_INPUT_NORMAL);
         }
 
         //Set keyY
         u8 __attribute__((aligned(4))) keyY[AES_BLOCK_SIZE];
-        memcpy(keyY, arm9Section + 0x10, sizeof(keyY));
+        memcpy(keyY, arm9Section->keyY, sizeof(keyY));
         aes_setkey(arm9BinSlot, keyY, AES_KEYY, AES_INPUT_BE | AES_INPUT_NORMAL);
 
         //Set CTR
         u8 __attribute__((aligned(4))) arm9BinCtr[AES_BLOCK_SIZE];
-        memcpy(arm9BinCtr, arm9Section + 0x20, sizeof(arm9BinCtr));
-
-        //Calculate the size of the ARM9 binary
-        u32 arm9BinSize = 0;
-        //http://stackoverflow.com/questions/12791077/atoi-implementation-in-c
-        for(u8 *tmp = arm9Section + 0x30; *tmp != 0; tmp++)
-            arm9BinSize = (arm9BinSize << 3) + (arm9BinSize << 1) + *tmp - '0';
+        memcpy(arm9BinCtr, arm9Section->ctr, sizeof(arm9BinCtr));
 
         //Decrypt ARM9 binary
         aes_use_keyslot(arm9BinSlot);
-        aes(arm9Section + 0x800, arm9Section + 0x800, arm9BinSize / AES_BLOCK_SIZE, arm9BinCtr, AES_CTR_MODE, AES_INPUT_BE | AES_INPUT_NORMAL);
+        aes(startOfArm9Bin, startOfArm9Bin, decAtoi(arm9Section->size, sizeof(arm9Section->size)) / AES_BLOCK_SIZE, arm9BinCtr, AES_CTR_MODE, AES_INPUT_BE | AES_INPUT_NORMAL);
+
+        if(*startOfArm9Bin != 0x47704770 && *startOfArm9Bin != 0xB0862000) error("Failed to decrypt the ARM9 binary.");
     }
 
     //Set >=9.6 KeyXs
@@ -482,19 +531,20 @@ void computePinHash(u8 *outbuf, const u8 *inbuf)
     u8 __attribute__((aligned(4))) cid[AES_BLOCK_SIZE];
     u8 __attribute__((aligned(4))) cipherText[AES_BLOCK_SIZE];
 
-    if(isA9lh && !didShaHashBackup)
-    {
-        memcpy(shaHashBackup, (void *)REG_SHA_HASH, sizeof(shaHashBackup));
-        didShaHashBackup = true;
-    }
-
     sdmmc_get_cid(1, (u32 *)cid);
     aes_use_keyslot(4); //Console-unique keyslot whose keys are set by the ARM9 bootROM
     aes(cipherText, inbuf, 1, cid, AES_CBC_ENCRYPT_MODE, AES_INPUT_BE | AES_INPUT_NORMAL);
     sha(outbuf, cipherText, sizeof(cipherText), SHA_256_MODE);
 }
 
-void restoreShaHashBackup(void)
+void backupAndRestoreShaHash(bool isRestore)
 {
-    if(didShaHashBackup) memcpy((void *)REG_SHA_HASH, shaHashBackup, sizeof(shaHashBackup));
+    if(ISA9LH)
+    {
+        if(isRestore)
+        {
+            if(didShaHashBackup) memcpy((void *)REG_SHA_HASH, shaHashBackup, sizeof(shaHashBackup));
+        }
+        else if(!didShaHashBackup) memcpy(shaHashBackup, (void *)REG_SHA_HASH, sizeof(shaHashBackup));
+    }
 }

source/crypto.h

@@ -24,6 +24,7 @@
 *   Crypto libs from http://github.com/b1l1s/ctr
 *   kernel9Loader code originally adapted from https://github.com/Reisyukaku/ReiNand/blob/228c378255ba693133dec6f3368e14d386f2cde7/source/crypto.c#L233
 *   decryptNusFirm code adapted from https://github.com/mid-kid/CakesForeveryWan/blob/master/source/firm.c
+*   ctrNandWrite logic adapted from https://github.com/d0k3/GodMode9/blob/master/source/nand/nand.c
 */
 
 #pragma once
@@ -102,14 +103,14 @@
 #define SHA_1_HASH_SIZE     (160 / 8)
 
 extern u32 emuOffset;
-extern bool isN3DS, isDevUnit, isA9lh;
 extern FirmwareSource firmSource;
 
 void ctrNandInit(void);
-u32 ctrNandRead(u32 sector, u32 sectorCount, u8 *outbuf);
+int ctrNandRead(u32 sector, u32 sectorCount, u8 *outbuf);
+int ctrNandWrite(u32 sector, u32 sectorCount, const u8 *inbuf);
 void set6x7xKeys(void);
-void decryptExeFs(u8 *inbuf);
-void decryptNusFirm(const u8 *inbuf, u8 *outbuf, u32 ncchSize);
-void kernel9Loader(u8 *arm9Section);
+bool decryptExeFs(Cxi *cxi);
+bool decryptNusFirm(const Ticket *ticket, Cxi *cxi, u32 ncchSize);
+void kernel9Loader(Arm9Bin *arm9Section);
 void computePinHash(u8 *outbuf, const u8 *inbuf);
-void restoreShaHashBackup(void);
+void backupAndRestoreShaHash(bool isRestore);

source/draw.c

@@ -34,27 +34,35 @@
 
 bool loadSplash(void)
 {
-    const char topSplashPath[] = "/luma/splash.bin",
-               bottomSplashPath[] = "/luma/splashbottom.bin";
+    const char *topSplashFile = "splash.bin",
+               *bottomSplashFile = "splashbottom.bin";
 
-    bool isTopSplashValid = getFileSize(topSplashPath) == SCREEN_TOP_FBSIZE,
-         isBottomSplashValid = getFileSize(bottomSplashPath) == SCREEN_BOTTOM_FBSIZE;
+    bool isTopSplashValid = getFileSize(topSplashFile) == SCREEN_TOP_FBSIZE,
+         isBottomSplashValid = getFileSize(bottomSplashFile) == SCREEN_BOTTOM_FBSIZE,
+         ret;
 
     //Don't delay boot nor init the screens if no splash images or invalid splash images are on the SD
-    if(!isTopSplashValid && !isBottomSplashValid)
-        return false;
+    if(!isTopSplashValid && !isBottomSplashValid) ret = false;
+    else
+    {
+        initScreens();
+        clearScreens(true, true, true);
 
-    initScreens();
-    clearScreens(true, true, true);
+        if(isTopSplashValid) isTopSplashValid = fileRead(fbs[1].top_left, topSplashFile, SCREEN_TOP_FBSIZE) == SCREEN_TOP_FBSIZE;
+        if(isBottomSplashValid) isBottomSplashValid = fileRead(fbs[1].bottom, bottomSplashFile, SCREEN_BOTTOM_FBSIZE) == SCREEN_BOTTOM_FBSIZE;
 
-    if(isTopSplashValid) fileRead(fbs[1].top_left, topSplashPath, 0);
-    if(isBottomSplashValid) fileRead(fbs[1].bottom, bottomSplashPath, 0);
+        if(!isTopSplashValid && !isBottomSplashValid) ret = false;
+        else
+        {
+            swapFramebuffers(true);
 
-    swapFramebuffers(true);
+            chrono(3);
 
-    chrono(3);
+            ret = true;
+        }
+    }
 
-    return true;
+    return ret;
 }
 
 void drawCharacter(char character, bool isTopScreen, u32 posX, u32 posY, u32 color)

source/emunand.c

@@ -20,11 +20,17 @@
 *   Notices displayed by works containing it.
 */
 
+/*
+*   Code for locating the SDMMC struct by Normmatt
+*/
+
 #include "emunand.h"
 #include "memory.h"
 #include "fatfs/sdmmc/sdmmc.h"
 #include "../build/bundled.h"
 
+u32 emuOffset;
+
 void locateEmuNand(u32 *emuHeader, FirmwareSource *nandType)
 {
     static u8 __attribute__((aligned(4))) temp[0x200];
@@ -50,7 +56,7 @@ void locateEmuNand(u32 *emuHeader, FirmwareSource *nandType)
                 nandOffset = ROUND_TO_4MB(nandSize + 1); //"Default" layout
                 break;
             case 2:
-                nandOffset = roundedMinsizes[isN3DS ? 1 : 0]; //"Minsize" layout
+                nandOffset = roundedMinsizes[ISN3DS ? 1 : 0]; //"Minsize" layout
                 break;
             default:
                 nandOffset = *nandType == FIRMWARE_EMUNAND ? 0 : (nandSize > 0x200000 ? 0x400000 : 0x200000); //"Legacy" layout
@@ -59,10 +65,10 @@ void locateEmuNand(u32 *emuHeader, FirmwareSource *nandType)
 
         if(*nandType != FIRMWARE_EMUNAND) nandOffset *= ((u32)*nandType - 1);
 
-        if(fatStart >= nandOffset + roundedMinsizes[isN3DS ? 1 : 0])
+        if(fatStart >= nandOffset + roundedMinsizes[ISN3DS ? 1 : 0])
         {
             //Check for RedNAND
-            if(!sdmmc_sdcard_readsectors(nandOffset + 1, 1, temp) && *(u32 *)(temp + 0x100) == NCSD_MAGIC)
+            if(!sdmmc_sdcard_readsectors(nandOffset + 1, 1, temp) && memcmp(temp + 0x100, "NCSD", 4) == 0)
             {
                 emuOffset = nandOffset + 1;
                 *emuHeader = nandOffset + 1;
@@ -70,7 +76,7 @@ void locateEmuNand(u32 *emuHeader, FirmwareSource *nandType)
             }
 
             //Check for Gateway EmuNAND
-            else if(i != 2 && !sdmmc_sdcard_readsectors(nandOffset + nandSize, 1, temp) && *(u32 *)(temp + 0x100) == NCSD_MAGIC)
+            else if(i != 2 && !sdmmc_sdcard_readsectors(nandOffset + nandSize, 1, temp) && memcmp(temp + 0x100, "NCSD", 4) == 0)
             {
                 emuOffset = nandOffset;
                 *emuHeader = nandOffset + nandSize;
@@ -93,68 +99,125 @@ void locateEmuNand(u32 *emuHeader, FirmwareSource *nandType)
     }
 }
 
-static inline u8 *getFreeK9Space(u8 *pos, u32 size)
+static inline u32 getFreeK9Space(u8 *pos, u32 size, u8 **freeK9Space)
 {
     const u8 pattern[] = {0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0x00};
+    u32 ret;
 
     //Looking for the last free space before Process9
-    return memsearch(pos + 0x13500, pattern, size - 0x13500, sizeof(pattern)) + 0x455;
+    *freeK9Space = memsearch(pos, pattern, size, sizeof(pattern));
+
+    if(*freeK9Space == NULL) ret = 1;
+    else
+    {
+        *freeK9Space += 0x455;
+
+        ret = 0;
+    }
+
+    return ret;
 }
 
-static inline u32 getSdmmc(u8 *pos, u32 size)
+static inline u32 getSdmmc(u8 *pos, u32 size, u32 *sdmmc)
 {
     //Look for struct code
     const u8 pattern[] = {0x21, 0x20, 0x18, 0x20};
+    u32 ret;
+
     const u8 *off = memsearch(pos, pattern, size, sizeof(pattern));
 
-    return *(u32 *)(off + 9) + *(u32 *)(off + 0xD);
+    if(off == NULL) ret = 1;
+    else
+    {
+        *sdmmc = *(u32 *)(off + 9) + *(u32 *)(off + 0xD);
+
+        ret = 0;
+    }
+
+    return ret;
 }
 
-static inline void patchNandRw(u8 *pos, u32 size, u32 branchOffset)
+static inline u32 patchNandRw(u8 *pos, u32 size, u32 branchOffset)
 {
     //Look for read/write code
     const u8 pattern[] = {0x1E, 0x00, 0xC8, 0x05};
+    u32 ret;
 
-    u16 *readOffset = (u16 *)memsearch(pos, pattern, size, sizeof(pattern)) - 3,
-        *writeOffset = (u16 *)memsearch((u8 *)(readOffset + 5), pattern, 0x100, sizeof(pattern)) - 3;
+    u16 *readOffset = (u16 *)memsearch(pos, pattern, size, sizeof(pattern));
 
-    *readOffset = *writeOffset = 0x4C00;
-    readOffset[1] = writeOffset[1] = 0x47A0;
-    ((u32 *)writeOffset)[1] = ((u32 *)readOffset)[1] = branchOffset;
+    if(readOffset == NULL) ret = 1;
+    else
+    {
+        readOffset -= 3;
+
+        u16 *writeOffset = (u16 *)memsearch((u8 *)(readOffset + 5), pattern, 0x100, sizeof(pattern));
+
+        if(writeOffset == NULL) ret = 1;
+        else
+        {
+            writeOffset -= 3;
+            *readOffset = *writeOffset = 0x4C00;
+            readOffset[1] = writeOffset[1] = 0x47A0;
+            ((u32 *)writeOffset)[1] = ((u32 *)readOffset)[1] = branchOffset;
+
+            ret = 0;
+        }
+    }
+
+    return ret;
 }
 
-static inline void patchMpu(u8 *pos, u32 size)
+static inline u32 patchMpu(u8 *pos, u32 size)
 {
     //Look for MPU pattern
     const u8 pattern[] = {0x03, 0x00, 0x24, 0x00};
+    u32 ret;
 
-    u32 *off = (u32 *)memsearch(pos, pattern, size, sizeof(pattern));
+    u16 *off = (u16 *)memsearch(pos, pattern, size, sizeof(pattern));
 
-    off[0] = 0x00360003;
-    off[6] = 0x00200603;
-    off[9] = 0x001C0603;
+    if(off == NULL) ret = 1;
+    else
+    {
+        off[1] = 0x0036;
+        off[0xC] = off[0x12] = 0x0603;
+
+        ret = 0;
+    }
+
+    return ret;
 }
 
-void patchEmuNand(u8 *arm9Section, u32 arm9SectionSize, u8 *process9Offset, u32 process9Size, u32 emuHeader, u32 branchAdditive)
+u32 patchEmuNand(u8 *arm9Section, u32 kernel9Size, u8 *process9Offset, u32 process9Size, u32 emuHeader, u8 *kernel9Address)
 {
-    //Copy EmuNAND code
-    u8 *freeK9Space = getFreeK9Space(arm9Section, arm9SectionSize);
-    memcpy(freeK9Space, emunand_bin, emunand_bin_size);
+    u32 ret = 0;
 
-    //Add the data of the found EmuNAND
-    u32 *posOffset = (u32 *)memsearch(freeK9Space, "NAND", emunand_bin_size, 4),
-        *posHeader = (u32 *)memsearch(freeK9Space, "NCSD", emunand_bin_size, 4);
-    *posOffset = emuOffset;
-    *posHeader = emuHeader;
+    u8 *freeK9Space;
+    ret += getFreeK9Space(arm9Section, kernel9Size, &freeK9Space);
 
-    //Find and add the SDMMC struct
-    u32 *posSdmmc = (u32 *)memsearch(freeK9Space, "SDMC", emunand_bin_size, 4);
-    *posSdmmc = getSdmmc(process9Offset, process9Size);
+    if(!ret)
+    {
+        //Copy EmuNAND code
+        memcpy(freeK9Space, emunand_bin, emunand_bin_size);
 
-    //Add EmuNAND hooks
-    u32 branchOffset = (u32)freeK9Space - branchAdditive;
-    patchNandRw(process9Offset, process9Size, branchOffset);
+        //Add the data of the found EmuNAND
+        u32 *posOffset = (u32 *)memsearch(freeK9Space, "NAND", emunand_bin_size, 4),
+            *posHeader = (u32 *)memsearch(freeK9Space, "NCSD", emunand_bin_size, 4);
+        *posOffset = emuOffset;
+        *posHeader = emuHeader;
 
-    //Set MPU
-    patchMpu(arm9Section, arm9SectionSize);
+        //Find and add the SDMMC struct
+        u32 *posSdmmc = (u32 *)memsearch(freeK9Space, "SDMC", emunand_bin_size, 4);
+        u32 sdmmc;
+        ret += getSdmmc(process9Offset, process9Size, &sdmmc);
+        if(!ret) *posSdmmc = sdmmc;
+
+        //Add EmuNAND hooks
+        u32 branchOffset = (u32)(freeK9Space - arm9Section + kernel9Address);
+        ret += patchNandRw(process9Offset, process9Size, branchOffset);
+
+        //Set MPU
+        ret += patchMpu(arm9Section, kernel9Size);
+    }
+
+    return ret;
 }

source/emunand.h

@@ -20,15 +20,15 @@
 *   Notices displayed by works containing it.
 */
 
+/*
+*   Code for locating the SDMMC struct by Normmatt
+*/
+
 #pragma once
 
 #include "types.h"
 
-#define NCSD_MAGIC      0x4453434E
 #define ROUND_TO_4MB(a) (((a) + 0x2000 - 1) & (~(0x2000 - 1)))
 
-extern u32 emuOffset;
-extern bool isN3DS;
-
 void locateEmuNand(u32 *emuHeader, FirmwareSource *nandType);
-void patchEmuNand(u8 *arm9Section, u32 arm9SectionSize, u8 *process9Offset, u32 process9Size, u32 emuHeader, u32 branchAdditive);
+u32 patchEmuNand(u8 *arm9Section, u32 kernel9Size, u8 *process9Offset, u32 process9Size, u32 emuHeader, u8 *kernel9Address);

source/exceptions.c

@@ -45,37 +45,49 @@ void installArm9Handlers(void)
     }
 }
 
-void installArm11Handlers(u32 *exceptionsPage, u32 stackAddress, u32 codeSetOffset)
+u32 installArm11Handlers(u32 *exceptionsPage, u32 stackAddress, u32 codeSetOffset)
 {
-    u32 *initFPU;
-    for(initFPU = exceptionsPage; initFPU < (exceptionsPage + 0x400) && (initFPU[0] != 0xE59F0008 || initFPU[1] != 0xE5900000); initFPU++);
+    u32 ret;
+    u32 *endPos = exceptionsPage + 0x400;
 
-    u32 *mcuReboot;
-    for(mcuReboot = exceptionsPage; mcuReboot < (exceptionsPage + 0x400) && (mcuReboot[0] != 0xE59F4104 || mcuReboot[1] != 0xE3A0A0C2); mcuReboot++);
-    mcuReboot--;
+    u32 *initFPU;
+    for(initFPU = exceptionsPage; *initFPU != 0xE1A0D002 && initFPU < endPos; initFPU++);
 
     u32 *freeSpace;
-    for(freeSpace = initFPU; freeSpace < (exceptionsPage + 0x400) && (freeSpace[0] != 0xFFFFFFFF || freeSpace[1] != 0xFFFFFFFF); freeSpace++);
+    for(freeSpace = initFPU; *freeSpace != 0xFFFFFFFF && freeSpace < endPos; freeSpace++);
 
-    memcpy(freeSpace, arm11_exceptions_bin + 32, arm11_exceptions_bin_size - 32);
+    u32 *mcuReboot;
+    for(mcuReboot = exceptionsPage; *mcuReboot != 0xE3A0A0C2 && mcuReboot < endPos; mcuReboot++);
 
-    exceptionsPage[1] = MAKE_BRANCH(exceptionsPage + 1, (u8 *)freeSpace + *(u32 *)(arm11_exceptions_bin + 8)  - 32);    //Undefined Instruction
-    exceptionsPage[3] = MAKE_BRANCH(exceptionsPage + 3, (u8 *)freeSpace + *(u32 *)(arm11_exceptions_bin + 12) - 32);    //Prefetch Abort
-    exceptionsPage[4] = MAKE_BRANCH(exceptionsPage + 4, (u8 *)freeSpace + *(u32 *)(arm11_exceptions_bin + 16) - 32);    //Data Abort
-    exceptionsPage[7] = MAKE_BRANCH(exceptionsPage + 7, (u8 *)freeSpace + *(u32 *)(arm11_exceptions_bin + 4)  - 32);    //FIQ
-
-    for(u32 *pos = freeSpace; pos < (u32 *)((u8 *)freeSpace + arm11_exceptions_bin_size - 32); pos++)
+    if(initFPU == endPos || freeSpace == endPos || mcuReboot == endPos || *(u32 *)((u8 *)freeSpace + arm11_exceptions_bin_size - 36) != 0xFFFFFFFF) ret = 1;
+    else
     {
-        switch(*pos) //Perform relocations
+        initFPU += 3;
+        mcuReboot -= 2;
+
+        memcpy(freeSpace, arm11_exceptions_bin + 32, arm11_exceptions_bin_size - 32);
+
+        exceptionsPage[1] = MAKE_BRANCH(exceptionsPage + 1, (u8 *)freeSpace + *(u32 *)(arm11_exceptions_bin + 8)  - 32); //Undefined Instruction
+        exceptionsPage[3] = MAKE_BRANCH(exceptionsPage + 3, (u8 *)freeSpace + *(u32 *)(arm11_exceptions_bin + 12) - 32); //Prefetch Abort
+        exceptionsPage[4] = MAKE_BRANCH(exceptionsPage + 4, (u8 *)freeSpace + *(u32 *)(arm11_exceptions_bin + 16) - 32); //Data Abort
+        exceptionsPage[7] = MAKE_BRANCH(exceptionsPage + 7, (u8 *)freeSpace + *(u32 *)(arm11_exceptions_bin + 4)  - 32); //FIQ
+
+        for(u32 *pos = freeSpace; pos < (u32 *)((u8 *)freeSpace + arm11_exceptions_bin_size - 32); pos++)
         {
-            case 0xFFFF3000: *pos = stackAddress; break;
-            case 0xEBFFFFFE: *pos = MAKE_BRANCH_LINK(pos, initFPU); break;
-            case 0xEAFFFFFE: *pos = MAKE_BRANCH(pos, mcuReboot); break;
-            case 0xE12FFF1C: pos[1] = 0xFFFF0000 + 4 * (u32)(freeSpace - exceptionsPage) + pos[1] - 32; break; //bx r12 (mainHandler)
-            case 0xBEEFBEEF: *pos = codeSetOffset; break;
-            default: break;
+            switch(*pos) //Perform relocations
+            {
+                case 0xFFFF3000: *pos = stackAddress; break;
+                case 0xEBFFFFFE: *pos = MAKE_BRANCH_LINK(pos, initFPU); break;
+                case 0xEAFFFFFE: *pos = MAKE_BRANCH(pos, mcuReboot); break;
+                case 0xE12FFF1C: pos[1] = 0xFFFF0000 + 4 * (u32)(freeSpace - exceptionsPage) + pos[1] - 32; break; //bx r12 (mainHandler)
+                case 0xBEEFBEEF: *pos = codeSetOffset; break;
+            }
         }
+
+        ret = 0;
     }
+
+    return ret;
 }
 
 void detectAndProcessExceptionDumps(void)
@@ -139,13 +151,13 @@ void detectAndProcessExceptionDumps(void)
         for(u32 i = 0; i < 17; i += 2)
         {
             posY = drawString(registerNames[i], true, 10, posY + SPACING_Y, COLOR_WHITE);
-            hexItoa(regs[i], hexString, 8);
+            hexItoa(regs[i], hexString, 8, true);
             drawString(hexString, true, 10 + 7 * SPACING_X, posY, COLOR_WHITE);
 
             if(i != 16 || dumpHeader->processor != 9)
             {
                 drawString(registerNames[i + 1], true, 10 + 22 * SPACING_X, posY, COLOR_WHITE);
-                hexItoa(i == 16 ? regs[20] : regs[i + 1], hexString, 8);
+                hexItoa(i == 16 ? regs[20] : regs[i + 1], hexString, 8, true);
                 drawString(hexString, true, 10 + 29 * SPACING_X, posY, COLOR_WHITE);
             }
         }
@@ -160,21 +172,21 @@ void detectAndProcessExceptionDumps(void)
 
         for(u32 line = 0; line < 19 && stackDump < additionalData; line++)
         {
-            hexItoa(regs[13] + 8 * line, hexString, 8);
+            hexItoa(regs[13] + 8 * line, hexString, 8, true);
             posYBottom = drawString(hexString, false, 10, posYBottom + SPACING_Y, COLOR_WHITE);
             drawCharacter(':', false, 10 + 8 * SPACING_X, posYBottom, COLOR_WHITE);
 
             for(u32 i = 0; i < 8 && stackDump < additionalData; i++, stackDump++)
             {
                 char byteString[] = "00";
-                hexItoa(*stackDump, byteString, 2);
+                hexItoa(*stackDump, byteString, 2, false);
                 drawString(byteString, false, 10 + 10 * SPACING_X + 3 * i * SPACING_X, posYBottom, COLOR_WHITE);
             }
         }
 
-        char path[42];
+        char path[36];
         char fileName[] = "crash_dump_00000000.dmp";
-        const char *pathFolder = dumpHeader->processor == 9 ? "/luma/dumps/arm9" : "/luma/dumps/arm11";
+        const char *pathFolder = dumpHeader->processor == 9 ? "dumps/arm9" : "dumps/arm11";
 
         findDumpFile(pathFolder, fileName);
         memcpy(path, pathFolder, strlen(pathFolder) + 1);

source/exceptions.h

@@ -27,21 +27,6 @@
 #define MAKE_BRANCH(src,dst)      (0xEA000000 | ((u32)((((u8 *)(dst) - (u8 *)(src)) >> 2) - 2) & 0xFFFFFF))
 #define MAKE_BRANCH_LINK(src,dst) (0xEB000000 | ((u32)((((u8 *)(dst) - (u8 *)(src)) >> 2) - 2) & 0xFFFFFF))
 
-typedef struct __attribute__((packed))
-{
-    u32 magic[2];
-    u16 versionMinor, versionMajor;
-
-    u16 processor, core;
-    u32 type;
-
-    u32 totalSize;
-    u32 registerDumpSize;
-    u32 codeDumpSize;
-    u32 stackDumpSize;
-    u32 additionalDataSize;
-} ExceptionDumpHeader;
-
 void installArm9Handlers(void);
-void installArm11Handlers(u32 *exceptionsPage, u32 stackAddress, u32 codeSetOffset);
+u32 installArm11Handlers(u32 *exceptionsPage, u32 stackAddress, u32 codeSetOffset);
 void detectAndProcessExceptionDumps(void);

source/fatfs/diskio.c

@@ -37,17 +37,23 @@ DSTATUS disk_initialize (
 	BYTE pdrv				/* Physical drive nmuber to identify the drive */
 )
 {
-        switch(pdrv)
-        {
-            case SDCARD:
-                sdmmc_sdcard_init();
-                break;
-            case CTRNAND:
-                ctrNandInit();
-                break;
-        }
+        DSTATUS ret;
+        static u32 sdmmcInitResult = 4;
 
-	return RES_OK;
+        if(sdmmcInitResult == 4) sdmmcInitResult = sdmmc_sdcard_init();
+
+        if(pdrv == CTRNAND)
+        {
+            if(!(sdmmcInitResult & 1))
+            {
+                ctrNandInit();
+                ret = 0;
+            }
+            else ret = STA_NOINIT;
+        }
+        else ret = (!(sdmmcInitResult & 2)) ? 0 : STA_NOINIT;
+
+	return ret;
 }
 
 
@@ -63,19 +69,8 @@ DRESULT disk_read (
 	UINT count		/* Number of sectors to read */
 )
 {
-        switch(pdrv)
-        {
-            case SDCARD:
-                if(sdmmc_sdcard_readsectors(sector, count, (BYTE *)buff))
-		    return RES_PARERR;
-                break;
-            case CTRNAND:
-                if(ctrNandRead(sector, count, (BYTE *)buff))
-		    return RES_PARERR;
-                break;
-        }
-
-        return RES_OK;
+        return ((pdrv == SDCARD && !sdmmc_sdcard_readsectors(sector, count, buff)) ||
+                (pdrv == CTRNAND && !ctrNandRead(sector, count, buff))) ? RES_OK : RES_PARERR;
 }
 
 
@@ -92,10 +87,8 @@ DRESULT disk_write (
 	UINT count			/* Number of sectors to write */
 )
 {
-        if(pdrv == SDCARD && sdmmc_sdcard_writesectors(sector, count, (BYTE *)buff))
-            return RES_PARERR;
-
-        return RES_OK;
+        return ((pdrv == SDCARD && !sdmmc_sdcard_writesectors(sector, count, buff)) ||
+                (pdrv == CTRNAND && !ctrNandWrite(sector, count, buff))) ? RES_OK : RES_PARERR;
 }
 #endif
 

source/fatfs/ffconf.h

@@ -134,7 +134,7 @@
 /  This option has no effect when _LFN_UNICODE == 0. */
 
 
-#define _FS_RPATH	0
+#define _FS_RPATH	1
 /* This option configures support of relative path.
 /
 /   0: Disable relative path and remove related functions.

source/fatfs/sdmmc/sdmmc.c

@@ -244,7 +244,6 @@ int __attribute__((noinline)) sdmmc_nand_readsectors(u32 sector_no, u32 numsecto
     return geterror(&handleNAND);
 }
 
-/*
 int __attribute__((noinline)) sdmmc_nand_writesectors(u32 sector_no, u32 numsectors, const u8 *in) //experimental
 {
     if(handleNAND.isSDHC == 0) sector_no <<= 9;
@@ -259,7 +258,6 @@ int __attribute__((noinline)) sdmmc_nand_writesectors(u32 sector_no, u32 numsect
     inittarget(&handleSD);
     return geterror(&handleNAND);
 }
-*/
 
 static u32 calcSDSize(u8 *csd, int type)
 {
@@ -268,17 +266,17 @@ static u32 calcSDSize(u8 *csd, int type)
     switch(type)
     {
         case 0:
-            {
-                u32 block_len = csd[9] & 0xF;
-                block_len = 1u << block_len;
-                u32 mult = (u32)((csd[4] >> 7) | ((csd[5] & 3) << 1));
-                mult = 1u << (mult + 2);
-                result = csd[8] & 3;
-                result = (result << 8) | csd[7];
-                result = (result << 2) | (csd[6] >> 6);
-                result = (result + 1) * mult * block_len / 512;
-            }
+        {
+            u32 block_len = csd[9] & 0xF;
+            block_len = 1u << block_len;
+            u32 mult = (u32)((csd[4] >> 7) | ((csd[5] & 3) << 1));
+            mult = 1u << (mult + 2);
+            result = csd[8] & 3;
+            result = (result << 8) | csd[7];
+            result = (result << 2) | (csd[6] >> 6);
+            result = (result + 1) * mult * block_len / 512;
             break;
+        }
         case 1:
             result = csd[7] & 0x3F;
             result = (result << 8) | csd[6];
@@ -472,9 +470,11 @@ void sdmmc_get_cid(bool isNand, u32 *info)
     sdmmc_send_command(device, 0x10507, device->initarg << 0x10);
 }
 
-void sdmmc_sdcard_init()
+u32 sdmmc_sdcard_init()
 {
+    u32 ret = 0;
     InitSD();
-    Nand_Init();
-    SD_Init();
+    if(Nand_Init() != 0) ret &= 1;
+    if(SD_Init() != 0) ret &= 2;
+    return ret;
 }

source/fatfs/sdmmc/sdmmc.h

@@ -91,10 +91,10 @@ typedef struct mmcdevice {
     u32 res;
 } mmcdevice;
 
-void sdmmc_sdcard_init();
+u32 sdmmc_sdcard_init();
 int sdmmc_sdcard_readsectors(u32 sector_no, u32 numsectors, u8 *out);
 int sdmmc_sdcard_writesectors(u32 sector_no, u32 numsectors, const u8 *in);
 int sdmmc_nand_readsectors(u32 sector_no, u32 numsectors, u8 *out);
-//int sdmmc_nand_writesectors(u32 sector_no, u32 numsectors, const u8 *in);
+int sdmmc_nand_writesectors(u32 sector_no, u32 numsectors, const u8 *in);
 void sdmmc_get_cid(bool isNand, u32 *info);
 mmcdevice *getMMCDevice(int drive);

source/firm.c

@@ -31,299 +31,70 @@
 #include "cache.h"
 #include "emunand.h"
 #include "crypto.h"
-#include "draw.h"
 #include "screen.h"
-#include "buttons.h"
-#include "pin.h"
 #include "../build/bundled.h"
 
-extern u16 launchedFirmTidLow[8]; //Defined in start.s
+static Firm *firm = (Firm *)0x24000000;
 
-static firmHeader *firm = (firmHeader *)0x24000000;
-static const firmSectionHeader *section;
-
-u32 emuOffset;
-bool isN3DS,
-     isDevUnit,
-     isA9lh,
-     isFirmlaunch;
-CfgData configData;
-FirmwareSource firmSource;
-
-void main(void)
+u32 loadFirm(FirmwareType *firmType, FirmwareSource nandType, bool loadFromStorage, bool isSafeMode)
 {
-    u32 configTemp,
-        emuHeader;
-    FirmwareType firmType;
-    FirmwareSource nandType;
-    ConfigurationStatus needConfig;
-
-    //Detect the console being used
-    isN3DS = PDN_MPCORE_CFG == 7;
-
-    //Detect dev units
-    isDevUnit = CFG_UNITINFO != 0;
-
-    //Mount filesystems. CTRNAND will be mounted only if/when needed
-    mountFs();
-
-    //Attempt to read the configuration file
-    needConfig = readConfig() ? MODIFY_CONFIGURATION : CREATE_CONFIGURATION;
-
-    u32 devMode = MULTICONFIG(DEVOPTIONS);
-
-    //Determine if this is a firmlaunch boot
-    if(launchedFirmTidLow[5] != 0)
-    {
-        isFirmlaunch = true;
-
-        if(needConfig == CREATE_CONFIGURATION) mcuReboot();
-
-        //'0' = NATIVE_FIRM, '1' = TWL_FIRM, '2' = AGB_FIRM
-        firmType = launchedFirmTidLow[7] == u'3' ? SAFE_FIRM : (FirmwareType)(launchedFirmTidLow[5] - u'0');
-
-        nandType = (FirmwareSource)BOOTCFG_NAND;
-        firmSource = (FirmwareSource)BOOTCFG_FIRM;
-        isA9lh = BOOTCFG_A9LH != 0;
-    }
-    else
-    {
-        isFirmlaunch = false;
-        firmType = NATIVE_FIRM;
-
-        //Determine if booting with A9LH
-        isA9lh = !PDN_SPI_CNT;
-
-        if(devMode != 0 && isA9lh) detectAndProcessExceptionDumps();
-
-        //Get pressed buttons
-        u32 pressed = HID_PAD;
-
-        //Save old options and begin saving the new boot configuration
-        configTemp = (configData.config & 0xFFFFFE00) | ((u32)isA9lh << 6);
-
-        //If it's a MCU reboot, try to force boot options
-        if(isA9lh && CFG_BOOTENV)
-        {
-            //Always force a sysNAND boot when quitting AGB_FIRM
-            if(CFG_BOOTENV == 7)
-            {
-                nandType = FIRMWARE_SYSNAND;
-                firmSource = CONFIG(USESYSFIRM) ? FIRMWARE_SYSNAND : (FirmwareSource)BOOTCFG_FIRM;
-                needConfig = DONT_CONFIGURE;
-
-                //Flag to prevent multiple boot options-forcing
-                configTemp |= 1 << 7;
-            }
-
-            /* Else, force the last used boot options unless a button is pressed
-               or the no-forcing flag is set */
-            else if(needConfig != CREATE_CONFIGURATION && !pressed && !BOOTCFG_NOFORCEFLAG)
-            {
-                nandType = (FirmwareSource)BOOTCFG_NAND;
-                firmSource = (FirmwareSource)BOOTCFG_FIRM;
-                needConfig = DONT_CONFIGURE;
-            }
-        }
-
-        if(needConfig == DONT_CONFIGURE)
-        {
-            if(devMode != 0 && isA9lh) installArm9Handlers();
-        }
-
-        //Boot options aren't being forced
-        else
-        {
-            u32 pinMode = MULTICONFIG(PIN);
-            bool pinExists = pinMode != 0 && verifyPin(pinMode);
-
-            //If no configuration file exists or SELECT is held, load configuration menu
-            bool shouldLoadConfigMenu = needConfig == CREATE_CONFIGURATION || ((pressed & BUTTON_SELECT) && !(pressed & BUTTON_L1));
-
-            if(shouldLoadConfigMenu)
-            {
-                configMenu(pinExists, pinMode);
-
-                //Update pressed buttons
-                pressed = HID_PAD;
-
-                devMode = MULTICONFIG(DEVOPTIONS);
-            }
-
-            if(devMode != 0 && isA9lh) installArm9Handlers();
-
-            if(isA9lh && !CFG_BOOTENV && pressed == SAFE_MODE)
-            {
-                nandType = FIRMWARE_SYSNAND;
-                firmSource = FIRMWARE_SYSNAND;
-
-                //Flag to tell loader to init SD
-                configTemp |= 1 << 8;
-
-                //If the PIN has been verified, wait to make it easier to press the SAFE_MODE combo
-                if(pinExists && !shouldLoadConfigMenu)
-                {
-                    while(HID_PAD & PIN_BUTTONS);
-                    chrono(2);
-                }
-            }
-            else
-            {
-                u32 splashMode = MULTICONFIG(SPLASH);
-
-                if(splashMode == 1 && loadSplash()) pressed = HID_PAD;
-
-                /* If L and R/A/Select or one of the single payload buttons are pressed,
-                   chainload an external payload */
-                bool shouldLoadPayload = ((pressed & SINGLE_PAYLOAD_BUTTONS) && !(pressed & (BUTTON_L1 | BUTTON_R1 | BUTTON_A))) ||
-                                         ((pressed & L_PAYLOAD_BUTTONS) && (pressed & BUTTON_L1));
-
-                if(shouldLoadPayload) loadPayload(pressed);
-
-                if(splashMode == 2) loadSplash();
-
-                //Determine if the user chose to use the SysNAND FIRM as default for a R boot
-                bool useSysAsDefault = isA9lh ? CONFIG(USESYSFIRM) : false;
-
-                //If R is pressed, boot the non-updated NAND with the FIRM of the opposite one
-                if(pressed & BUTTON_R1)
-                {
-                    nandType = useSysAsDefault ? FIRMWARE_EMUNAND : FIRMWARE_SYSNAND;
-                    firmSource = useSysAsDefault ? FIRMWARE_SYSNAND : FIRMWARE_EMUNAND;
-                }
-
-                /* Else, boot the NAND the user set to autoboot or the opposite one, depending on L,
-                   with their own FIRM */
-                else
-                {
-                    nandType = (CONFIG(AUTOBOOTSYS) != !(pressed & BUTTON_L1)) ? FIRMWARE_EMUNAND : FIRMWARE_SYSNAND;
-                    firmSource = nandType;
-                }
-
-                //If we're booting EmuNAND or using EmuNAND FIRM, determine which one from the directional pad buttons, or otherwise from the config
-                if(nandType == FIRMWARE_EMUNAND || firmSource == FIRMWARE_EMUNAND)
-                {
-                    FirmwareSource temp;
-                    switch(pressed & EMUNAND_BUTTONS)
-                    {
-                        case BUTTON_UP:
-                            temp = FIRMWARE_EMUNAND;
-                            break;
-                        case BUTTON_RIGHT:
-                            temp = FIRMWARE_EMUNAND2;
-                            break;
-                        case BUTTON_DOWN:
-                            temp = FIRMWARE_EMUNAND3;
-                            break;
-                        case BUTTON_LEFT:
-                            temp = FIRMWARE_EMUNAND4;
-                            break;
-                        default:
-                            temp = (FirmwareSource)(1 + MULTICONFIG(DEFAULTEMU));
-                            break;
-                    }
-
-                    if(nandType == FIRMWARE_EMUNAND) nandType = temp;
-                    else firmSource = temp;
-                }
-            }
-        }
-    }
-
-    //If we need to boot EmuNAND, make sure it exists
-    if(nandType != FIRMWARE_SYSNAND)
-    {
-        locateEmuNand(&emuHeader, &nandType);
-        if(nandType == FIRMWARE_SYSNAND) firmSource = FIRMWARE_SYSNAND;
-    }
-
-    //Same if we're using EmuNAND as the FIRM source
-    else if(firmSource != FIRMWARE_SYSNAND)
-        locateEmuNand(&emuHeader, &firmSource);
-
-    if(!isFirmlaunch)
-    {
-        configTemp |= (u32)nandType | ((u32)firmSource << 3);
-        writeConfig(needConfig, configTemp);
-    }
-
-    bool loadFromSd = CONFIG(LOADSDFIRMSANDMODULES);
-    u32 firmVersion = loadFirm(&firmType, firmSource, loadFromSd);
-
-    switch(firmType)
-    {
-        case NATIVE_FIRM:
-            patchNativeFirm(firmVersion, nandType, emuHeader, devMode);
-            break;
-        case SAFE_FIRM:
-        case NATIVE_FIRM1X2X:
-            if(isA9lh) patch1x2xNativeAndSafeFirm(devMode);
-            break;
-        default:
-            patchLegacyFirm(firmType, firmVersion, devMode);
-            break;
-    }
-
-    launchFirm(firmType, loadFromSd);
-}
-
-static inline u32 loadFirm(FirmwareType *firmType, FirmwareSource firmSource, bool loadFromSd)
-{
-    section = firm->section;
-
     const char *firmwareFiles[] = {
-        "/luma/firmware.bin",
-        "/luma/firmware_twl.bin",
-        "/luma/firmware_agb.bin",
-        "/luma/firmware_safe.bin"
+        "firmware.bin",
+        "firmware_twl.bin",
+        "firmware_agb.bin",
+        "firmware_safe.bin"
     },
                *cetkFiles[] = {
-        "/luma/cetk",
-        "/luma/cetk_twl",
-        "/luma/cetk_agb",
-        "/luma/cetk_safe"
+        "cetk",
+        "cetk_twl",
+        "cetk_agb",
+        "cetk_safe"
     };
 
     //Load FIRM from CTRNAND
     u32 firmVersion = firmRead(firm, (u32)*firmType);
 
-    bool mustLoadFromSd = false;
+    if(firmVersion == 0xFFFFFFFF) error("Failed to get the CTRNAND FIRM.");
 
-    if(!isN3DS && *firmType == NATIVE_FIRM)
+    bool mustLoadFromStorage = false;
+
+    if(!ISN3DS && *firmType == NATIVE_FIRM)
     {
         if(firmVersion < 0x18)
         {
             //We can't boot < 3.x EmuNANDs
-            if(firmSource != FIRMWARE_SYSNAND) 
+            if(nandType != FIRMWARE_SYSNAND) 
                 error("An old unsupported EmuNAND has been detected.\nLuma3DS is unable to boot it.");
 
-            if(BOOTCFG_SAFEMODE != 0) error("SAFE_MODE is not supported on 1.x/2.x FIRM.");
+            if(isSafeMode) error("SAFE_MODE is not supported on 1.x/2.x FIRM.");
 
             *firmType = NATIVE_FIRM1X2X;
         }
 
-        //We can't boot a 3.x/4.x NATIVE_FIRM, load one from SD
-        else if(firmVersion < 0x25) mustLoadFromSd = true;
+        //We can't boot a 3.x/4.x NATIVE_FIRM, load one from SD/CTRNAND
+        else if(firmVersion < 0x25) mustLoadFromStorage = true;
     }
 
-    if(loadFromSd || mustLoadFromSd)
+    if(loadFromStorage || mustLoadFromStorage)
     {
-        u32 firmSize = fileRead(firm, *firmType == NATIVE_FIRM1X2X ? firmwareFiles[0] : firmwareFiles[(u32)*firmType], 0x400000);
+        u32 firmSize = fileRead(firm, *firmType == NATIVE_FIRM1X2X ? firmwareFiles[0] : firmwareFiles[(u32)*firmType], 0x400000 + sizeof(Cxi) + 0x200);
 
         if(firmSize > 0)
         {
+            if(firmSize <= sizeof(Cxi) + 0x200) error("The FIRM in /luma is not valid.");
+
             if(memcmp(firm, "FIRM", 4) != 0)
             {
                 u8 cetk[0xA50];
 
-                if(fileRead(cetk, *firmType == NATIVE_FIRM1X2X ? cetkFiles[0] : cetkFiles[(u32)*firmType], sizeof(cetk)) == sizeof(cetk))
-                    decryptNusFirm(cetk, (u8 *)firm, firmSize);
-                else error("The firmware.bin in /luma is encrypted\nor corrupted.");
+                if(fileRead(cetk, *firmType == NATIVE_FIRM1X2X ? cetkFiles[0] : cetkFiles[(u32)*firmType], sizeof(cetk)) != sizeof(cetk) ||
+                   !decryptNusFirm((Ticket *)(cetk + 0x140), (Cxi *)firm, firmSize))
+                    error("The FIRM in /luma is encrypted or corrupted.");
             }
 
-            //Check that the SD FIRM is right for the console from the ARM9 section address
-            if((section[3].offset ? section[3].address : section[2].address) != (isN3DS ? (u8 *)0x8006000 : (u8 *)0x8006800))
-                error("The firmware.bin in /luma is not valid for this\nconsole.");
+            //Check that the FIRM is right for the console from the ARM9 section address
+            if((firm->section[3].offset != 0 ? firm->section[3].address : firm->section[2].address) != (ISN3DS ? (u8 *)0x8006000 : (u8 *)0x8006800))
+                error("The FIRM in /luma is not for this console.");
 
             firmVersion = 0xFFFFFFFF;
         }
@@ -331,162 +102,229 @@ static inline u32 loadFirm(FirmwareType *firmType, FirmwareSource firmSource, bo
 
     if(firmVersion != 0xFFFFFFFF)
     {
-        if(mustLoadFromSd) error("An old unsupported FIRM has been detected.\nCopy a firmware.bin in /luma to boot.");
-        decryptExeFs((u8 *)firm);
+        if(mustLoadFromStorage) error("An old unsupported FIRM has been detected.\nCopy a firmware.bin in /luma to boot.");
+        if(!decryptExeFs((Cxi *)firm)) error("The CTRNAND FIRM is corrupted.");
     }
 
     return firmVersion;
 }
 
-static inline void patchNativeFirm(u32 firmVersion, FirmwareSource nandType, u32 emuHeader, u32 devMode)
+u32 patchNativeFirm(u32 firmVersion, FirmwareSource nandType, u32 emuHeader, bool isA9lhInstalled, bool isSafeMode, u32 devMode)
 {
-    u8 *arm9Section = (u8 *)firm + section[2].offset,
-       *arm11Section1 = (u8 *)firm + section[1].offset;
+    u8 *arm9Section = (u8 *)firm + firm->section[2].offset,
+       *arm11Section1 = (u8 *)firm + firm->section[1].offset;
 
-    if(isN3DS)
+    if(ISN3DS)
     {
         //Decrypt ARM9Bin and patch ARM9 entrypoint to skip kernel9loader
-        kernel9Loader(arm9Section);
+        kernel9Loader((Arm9Bin *)arm9Section);
         firm->arm9Entry = (u8 *)0x801B01C;
     }
 
     //Sets the 7.x NCCH KeyX and the 6.x gamecard save data KeyY on >= 6.0 O3DS FIRMs, if not using A9LH or a dev unit
-    else if(!isA9lh && firmVersion >= 0x29 && !isDevUnit) set6x7xKeys();
+    else if(!ISA9LH && !ISFIRMLAUNCH && firmVersion >= 0x29 && !ISDEVUNIT) set6x7xKeys();
 
     //Find the Process9 .code location, size and memory address
     u32 process9Size,
         process9MemAddr;
-    u8 *process9Offset = getProcess9(arm9Section + 0x15000, section[2].size - 0x15000, &process9Size, &process9MemAddr);
+    u8 *process9Offset = getProcess9Info(arm9Section, firm->section[2].size, &process9Size, &process9MemAddr);
 
-    //Find Kernel11 SVC table and handler, exceptions page and free space locations
+    //Find the Kernel11 SVC table and handler, exceptions page and free space locations
     u32 baseK11VA;
     u8 *freeK11Space;
     u32 *arm11SvcHandler,
         *arm11ExceptionsPage,
-        *arm11SvcTable = getKernel11Info(arm11Section1, section[1].size, &baseK11VA, &freeK11Space, &arm11SvcHandler, &arm11ExceptionsPage);
+        *arm11SvcTable = getKernel11Info(arm11Section1, firm->section[1].size, &baseK11VA, &freeK11Space, &arm11SvcHandler, &arm11ExceptionsPage);
+
+    u32 kernel9Size = (u32)(process9Offset - arm9Section) - sizeof(Cxi) - 0x200,
+        ret = 0;
 
     //Apply signature patches
-    patchSignatureChecks(process9Offset, process9Size);
+    ret += patchSignatureChecks(process9Offset, process9Size);
 
     //Apply EmuNAND patches
-    if(nandType != FIRMWARE_SYSNAND)
-    {
-        u32 branchAdditive = (u32)firm + section[2].offset - (u32)section[2].address;
-        patchEmuNand(arm9Section, section[2].size, process9Offset, process9Size, emuHeader, branchAdditive);
-    }
+    if(nandType != FIRMWARE_SYSNAND) ret += patchEmuNand(arm9Section, kernel9Size, process9Offset, process9Size, emuHeader, firm->section[2].address);
 
     //Apply FIRM0/1 writes patches on sysNAND to protect A9LH
-    else if(isA9lh) patchFirmWrites(process9Offset, process9Size);
+    else if(isA9lhInstalled) ret += patchFirmWrites(process9Offset, process9Size);
 
     //Apply firmlaunch patches
-    patchFirmlaunches(process9Offset, process9Size, process9MemAddr);
+    ret += patchFirmlaunches(process9Offset, process9Size, process9MemAddr);
 
     //11.0 FIRM patches
-    if(firmVersion >= (isN3DS ? 0x21 : 0x52))
+    if(firmVersion >= (ISN3DS ? 0x21 : 0x52))
     {
         //Apply anti-anti-DG patches
-        patchTitleInstallMinVersionCheck(process9Offset, process9Size);
+        ret += patchTitleInstallMinVersionChecks(process9Offset, process9Size, firmVersion);
 
         //Restore svcBackdoor
-        reimplementSvcBackdoor(arm11Section1, arm11SvcTable, baseK11VA, &freeK11Space);
+        ret += reimplementSvcBackdoor(arm11Section1, arm11SvcTable, baseK11VA, &freeK11Space);
     }
 
-    implementSvcGetCFWInfo(arm11Section1, arm11SvcTable, baseK11VA, &freeK11Space);
+    ret += implementSvcGetCFWInfo(arm11Section1, arm11SvcTable, baseK11VA, &freeK11Space, isSafeMode);
 
     //Apply UNITINFO patch
-    if(devMode == 2) patchUnitInfoValueSet(arm9Section, section[2].size);
+    if(devMode == 2) ret += patchUnitInfoValueSet(arm9Section, kernel9Size);
 
-    if(devMode != 0 && isA9lh)
+    if(devMode != 0 && isA9lhInstalled)
     {
         //ARM11 exception handlers
         u32 codeSetOffset,
-            stackAddress = getInfoForArm11ExceptionHandlers(arm11Section1, section[1].size, &codeSetOffset);
-        installArm11Handlers(arm11ExceptionsPage, stackAddress, codeSetOffset);
+            stackAddress = getInfoForArm11ExceptionHandlers(arm11Section1, firm->section[1].size, &codeSetOffset);
+        ret += installArm11Handlers(arm11ExceptionsPage, stackAddress, codeSetOffset);
         patchSvcBreak11(arm11Section1, arm11SvcTable);
-        patchKernel11Panic(arm11Section1, section[1].size);
+        ret += patchKernel11Panic(arm11Section1, firm->section[1].size);
 
         //ARM9 exception handlers
-        patchArm9ExceptionHandlersInstall(arm9Section, section[2].size);
-        patchSvcBreak9(arm9Section, section[2].size, (u32)section[2].address);
-        patchKernel9Panic(arm9Section, section[2].size);
+        ret += patchArm9ExceptionHandlersInstall(arm9Section, kernel9Size);
+        ret += patchSvcBreak9(arm9Section, kernel9Size, (u32)firm->section[2].address);
+        ret += patchKernel9Panic(arm9Section, kernel9Size);
     }
 
     if(CONFIG(PATCHACCESS))
     {
-        patchArm11SvcAccessChecks(arm11SvcHandler);
-        patchK11ModuleChecks(arm11Section1, section[1].size, &freeK11Space);
-        patchP9AccessChecks(process9Offset, process9Size);
+        ret += patchArm11SvcAccessChecks(arm11SvcHandler, (u32 *)(arm11Section1 + firm->section[1].size));
+        ret += patchK11ModuleChecks(arm11Section1, firm->section[1].size, &freeK11Space);
+        ret += patchP9AccessChecks(process9Offset, process9Size);
     }
+
+    return ret;
 }
 
-static inline void patchLegacyFirm(FirmwareType firmType, u32 firmVersion, u32 devMode)
+u32 patchTwlFirm(u32 firmVersion, u32 devMode)
 {
-    u8 *arm9Section = (u8 *)firm + section[3].offset;
+    u8 *arm9Section = (u8 *)firm + firm->section[3].offset;
     
     //On N3DS, decrypt ARM9Bin and patch ARM9 entrypoint to skip kernel9loader
-    if(isN3DS)
+    if(ISN3DS)
     {
-        kernel9Loader(arm9Section);
+        kernel9Loader((Arm9Bin *)arm9Section);
         firm->arm9Entry = (u8 *)0x801301C;
     }
 
-    if(isN3DS || firmVersion >= (firmType == TWL_FIRM ? 0x16 : 0xB)) 
-        applyLegacyFirmPatches((u8 *)firm, firmType);
+    //Find the Process9 .code location, size and memory address
+    u32 process9Size,
+        process9MemAddr;
+    u8 *process9Offset = getProcess9Info(arm9Section, firm->section[3].size, &process9Size, &process9MemAddr);
+
+    u32 kernel9Size = (u32)(process9Offset - arm9Section) - sizeof(Cxi) - 0x200,
+        ret = 0;
+
+    ret += patchLgySignatureChecks(process9Offset, process9Size);
+    ret += patchTwlInvalidSignatureChecks(process9Offset, process9Size);
+    ret += patchTwlNintendoLogoChecks(process9Offset, process9Size);
+    ret += patchTwlWhitelistChecks(process9Offset, process9Size);
+    if(ISN3DS || firmVersion > 0x11) ret += patchTwlFlashcartChecks(process9Offset, process9Size, firmVersion);
+    else if(!ISN3DS && firmVersion == 0x11) ret += patchOldTwlFlashcartChecks(process9Offset, process9Size);
+    ret += patchTwlShaHashChecks(process9Offset, process9Size);
 
     //Apply UNITINFO patch
-    if(devMode == 2) patchUnitInfoValueSet(arm9Section, section[3].size);
+    if(devMode == 2) ret += patchUnitInfoValueSet(arm9Section, kernel9Size);
+
+    return ret;
 }
 
-static inline void patch1x2xNativeAndSafeFirm(u32 devMode)
+u32 patchAgbFirm(u32 devMode)
 {
-    u8 *arm9Section = (u8 *)firm + section[2].offset;
+    u8 *arm9Section = (u8 *)firm + firm->section[3].offset;
+    
+    //On N3DS, decrypt ARM9Bin and patch ARM9 entrypoint to skip kernel9loader
+    if(ISN3DS)
+    {
+        kernel9Loader((Arm9Bin *)arm9Section);
+        firm->arm9Entry = (u8 *)0x801301C;
+    }
 
-    if(isN3DS)
+    //Find the Process9 .code location, size and memory address
+    u32 process9Size,
+        process9MemAddr;
+    u8 *process9Offset = getProcess9Info(arm9Section, firm->section[3].size, &process9Size, &process9MemAddr);
+
+    u32 kernel9Size = (u32)(process9Offset - arm9Section) - sizeof(Cxi) - 0x200,
+        ret = 0;
+
+    ret += patchLgySignatureChecks(process9Offset, process9Size);
+    if(CONFIG(SHOWGBABOOT)) ret += patchAgbBootSplash(process9Offset, process9Size);
+
+    //Apply UNITINFO patch
+    if(devMode == 2) ret += patchUnitInfoValueSet(arm9Section, kernel9Size);
+
+    return ret;
+}
+
+u32 patch1x2xNativeAndSafeFirm(u32 devMode)
+{
+    u8 *arm9Section = (u8 *)firm + firm->section[2].offset;
+
+    if(ISN3DS)
     {
         //Decrypt ARM9Bin and patch ARM9 entrypoint to skip kernel9loader
-        kernel9Loader(arm9Section);
+        kernel9Loader((Arm9Bin *)arm9Section);
         firm->arm9Entry = (u8 *)0x801B01C;
-
-        patchFirmWrites(arm9Section, section[2].size);
     }
-    else patchOldFirmWrites(arm9Section, section[2].size);
+
+    //Find the Process9 .code location, size and memory address
+    u32 process9Size,
+        process9MemAddr;
+    u8 *process9Offset = getProcess9Info(arm9Section, firm->section[2].size, &process9Size, &process9MemAddr);
+
+    u32 kernel9Size = (u32)(process9Offset - arm9Section) - sizeof(Cxi) - 0x200,
+        ret = 0;
+
+    ret += ISN3DS ? patchFirmWrites(process9Offset, process9Size) : patchOldFirmWrites(process9Offset, process9Size);
 
     if(devMode != 0)
     {
         //ARM9 exception handlers
-        patchArm9ExceptionHandlersInstall(arm9Section, section[2].size);
-        patchSvcBreak9(arm9Section, section[2].size, (u32)section[2].address);
+        ret += patchArm9ExceptionHandlersInstall(arm9Section, kernel9Size);
+        ret += patchSvcBreak9(arm9Section, kernel9Size, (u32)firm->section[2].address);
     }
+
+    return ret;
 }
 
-static inline void copySection0AndInjectSystemModules(FirmwareType firmType, bool loadFromSd)
+static inline void copySection0AndInjectSystemModules(FirmwareType firmType, bool loadFromStorage)
 {
-    u32 srcModuleSize,
+    u32 maxModuleSize = firmType == NATIVE_FIRM ? 0x80000 : 0x600000,
+        srcModuleSize,
         dstModuleSize;
+    const char *extModuleSizeError = "The external FIRM modules are too large.";
 
-    for(u8 *src = (u8 *)firm + section[0].offset, *srcEnd = src + section[0].size, *dst = section[0].address;
-        src < srcEnd; src += srcModuleSize, dst += dstModuleSize)
+    for(u8 *src = (u8 *)firm + firm->section[0].offset, *srcEnd = src + firm->section[0].size, *dst = firm->section[0].address;
+        src < srcEnd; src += srcModuleSize, dst += dstModuleSize, maxModuleSize -= dstModuleSize)
     {
-        srcModuleSize = *(u32 *)(src + 0x104) * 0x200;
-        const char *moduleName = (char *)(src + 0x200);
+        srcModuleSize = ((Cxi *)src)->ncch.contentSize * 0x200;
+        const char *moduleName = ((Cxi *)src)->exHeader.systemControlInfo.appTitle;
 
-        u32 fileSize;
+        bool loadedModule;
 
-        if(loadFromSd)
+        if(!loadFromStorage) loadedModule = false;
+        else
         {
-            char fileName[30] = "/luma/sysmodules/";
-            const char *ext = ".cxi";
+            char fileName[24] = "sysmodules/";
 
             //Read modules from files if they exist
             concatenateStrings(fileName, moduleName);
-            concatenateStrings(fileName, ext);
+            concatenateStrings(fileName, ".cxi");
 
-            fileSize = fileRead(dst, fileName, 2 * srcModuleSize);
+            dstModuleSize = getFileSize(fileName);
+
+            if(dstModuleSize == 0) loadedModule = false;
+            else
+            {
+                if(dstModuleSize > maxModuleSize) error(extModuleSizeError);
+
+                if(dstModuleSize <= sizeof(Cxi) + 0x200 ||
+                   fileRead(dst, fileName, dstModuleSize) != dstModuleSize ||
+                   memcmp(((Cxi *)dst)->ncch.magic, "NCCH", 4) != 0 ||
+                   memcmp(moduleName, ((Cxi *)dst)->exHeader.systemControlInfo.appTitle, sizeof(((Cxi *)dst)->exHeader.systemControlInfo.appTitle)) != 0)
+                    error("An external FIRM module is invalid or corrupted.");
+
+                loadedModule = true;
+            }
         }
-        else fileSize = 0;
 
-        if(fileSize > 0) dstModuleSize = fileSize;
-        else
+        if(!loadedModule)
         {
             const u8 *module;
 
@@ -501,29 +339,31 @@ static inline void copySection0AndInjectSystemModules(FirmwareType firmType, boo
                 dstModuleSize = srcModuleSize;
             }
 
+            if(dstModuleSize > maxModuleSize) error(extModuleSizeError);
+
             memcpy(dst, module, dstModuleSize);
         }
     }
 }
 
-static inline void launchFirm(FirmwareType firmType, bool loadFromSd)
+void launchFirm(FirmwareType firmType, bool loadFromStorage)
 {
     //Allow module injection and/or inject 3ds_injector on new NATIVE_FIRMs and LGY FIRMs
     u32 sectionNum;
-    if(firmType == NATIVE_FIRM || (loadFromSd && firmType != SAFE_FIRM && firmType != NATIVE_FIRM1X2X))
+    if(firmType == NATIVE_FIRM || (loadFromStorage && firmType != SAFE_FIRM && firmType != NATIVE_FIRM1X2X))
     {
-        copySection0AndInjectSystemModules(firmType, loadFromSd);
+        copySection0AndInjectSystemModules(firmType, loadFromStorage);
         sectionNum = 1;
     }
     else sectionNum = 0;
 
     //Copy FIRM sections to respective memory locations
-    for(; sectionNum < 4 && section[sectionNum].size != 0; sectionNum++)
-        memcpy(section[sectionNum].address, (u8 *)firm + section[sectionNum].offset, section[sectionNum].size);
+    for(; sectionNum < 4 && firm->section[sectionNum].size != 0; sectionNum++)
+        memcpy(firm->section[sectionNum].address, (u8 *)firm + firm->section[sectionNum].offset, firm->section[sectionNum].size);
 
     //Determine the ARM11 entry to use
     vu32 *arm11;
-    if(isFirmlaunch) arm11 = (vu32 *)0x1FFFFFFC;
+    if(ISFIRMLAUNCH) arm11 = (vu32 *)0x1FFFFFFC;
     else
     {
         deinitScreens();

source/firm.h

@@ -24,32 +24,9 @@
 
 #include "types.h"
 
-#define CFG_BOOTENV    (*(vu32 *)0x10010000)
-#define CFG_UNITINFO   (*(vu8  *)0x10010010)
-#define PDN_MPCORE_CFG (*(vu32 *)0x10140FFC)
-#define PDN_SPI_CNT    (*(vu32 *)0x101401C0)
-
-//FIRM Header layout
-typedef struct firmSectionHeader {
-    u32 offset;
-    u8 *address;
-    u32 size;
-    u32 procType;
-    u8 hash[0x20];
-} firmSectionHeader;
-
-typedef struct firmHeader {
-    u32 magic;
-    u32 reserved1;
-    u8 *arm11Entry;
-    u8 *arm9Entry;
-    u8 reserved2[0x30];
-    firmSectionHeader section[4];
-} firmHeader;
- 
-static inline u32 loadFirm(FirmwareType *firmType, FirmwareSource firmSource, bool loadFromSd);
-static inline void patchNativeFirm(u32 firmVersion, FirmwareSource nandType, u32 emuHeader, u32 devMode);
-static inline void patchLegacyFirm(FirmwareType firmType, u32 firmVersion, u32 devMode);
-static inline void patch1x2xNativeAndSafeFirm(u32 devMode);
-static inline void copySection0AndInjectSystemModules(FirmwareType firmType, bool loadFromSd);
-static inline void launchFirm(FirmwareType firmType, bool loadFromSd);
+u32 loadFirm(FirmwareType *firmType, FirmwareSource nandType, bool loadFromStorage, bool isSafeMode);
+u32 patchNativeFirm(u32 firmVersion, FirmwareSource nandType, u32 emuHeader, bool isA9lhInstalled, bool isSafeMode, u32 devMode);
+u32 patchTwlFirm(u32 firmVersion, u32 devMode);
+u32 patchAgbFirm(u32 devMode);
+u32 patch1x2xNativeAndSafeFirm(u32 devMode);
+void launchFirm(FirmwareType firmType, bool loadFromStorage);

source/fs.c

@@ -33,22 +33,45 @@
 static FATFS sdFs,
              nandFs;
 
-void mountFs(void)
+static bool switchToMainDir(bool isSd)
 {
-    f_mount(&sdFs, "0:", 1);
-    f_mount(&nandFs, "1:", 0);
+    const char *mainDir = isSd ? "/luma" : "/rw/luma";
+    bool ret;
+
+    switch(f_chdir(mainDir))
+    {
+        case FR_OK:
+            ret = true;
+            break;
+        case FR_NO_PATH:
+            f_mkdir(mainDir);
+            ret = switchToMainDir(isSd);
+            break;
+        default:
+            ret = false;
+            break;
+    }
+
+    return ret;
+}
+
+bool mountFs(bool isSd, bool switchToCtrNand)
+{
+    return isSd ? f_mount(&sdFs, "0:", 1) == FR_OK && switchToMainDir(true) :
+                  f_mount(&nandFs, "1:", 1) == FR_OK && (!switchToCtrNand || (f_chdrive("1:") == FR_OK && switchToMainDir(false)));
 }
 
 u32 fileRead(void *dest, const char *path, u32 maxSize)
 {
     FIL file;
-    u32 ret = 0;
+    u32 ret;
 
-    if(f_open(&file, path, FA_READ) == FR_OK)
+    if(f_open(&file, path, FA_READ) != FR_OK) ret = 0;
+    else
     {
         u32 size = f_size(&file);
         if(dest == NULL) ret = size;
-        else if(!(maxSize > 0 && size > maxSize))
+        else if(size <= maxSize)
             f_read(&file, dest, size, (unsigned int *)&ret);
         f_close(&file);
     }
@@ -64,34 +87,38 @@ u32 getFileSize(const char *path)
 bool fileWrite(const void *buffer, const char *path, u32 size)
 {
     FIL file;
+    bool ret;
 
-    FRESULT result = f_open(&file, path, FA_WRITE | FA_OPEN_ALWAYS);
-
-    if(result == FR_OK)
+    switch(f_open(&file, path, FA_WRITE | FA_OPEN_ALWAYS))
     {
-        unsigned int written;
-        f_write(&file, buffer, size, &written);
-        f_truncate(&file);
-        f_close(&file);
+        case FR_OK:
+        {
+            unsigned int written;
+            f_write(&file, buffer, size, &written);
+            f_truncate(&file);
+            f_close(&file);
 
-        return true;
+            ret = (u32)written == size;
+            break;
+        }
+        case FR_NO_PATH:
+            for(u32 i = 1; path[i] != 0; i++)
+                if(path[i] == '/')
+                {
+                    char folder[i + 1];
+                    memcpy(folder, path, i);
+                    folder[i] = 0;
+                    f_mkdir(folder);
+                }
+
+            ret = fileWrite(buffer, path, size);
+            break;
+        default:
+            ret = false;
+            break;
     }
 
-    if(result == FR_NO_PATH)
-    {
-        for(u32 i = 1; path[i] != 0; i++)
-           if(path[i] == '/')
-           {
-                char folder[i + 1];
-                memcpy(folder, path, i);
-                folder[i] = 0;
-                f_mkdir(folder);
-           }
-
-        return fileWrite(buffer, path, size);
-    }
-
-    return false;
+    return ret;
 }
 
 void fileDelete(const char *path)
@@ -117,35 +144,38 @@ void loadPayload(u32 pressed)
 
     DIR dir;
     FILINFO info;
-    char path[28] = "/luma/payloads";
+    char path[22] = "payloads";
 
     FRESULT result = f_findfirst(&dir, &info, path, pattern);
 
-    f_closedir(&dir);
-
-    if(result == FR_OK && info.fname[0] != 0)
+    if(result == FR_OK)
     {
-        u32 *loaderAddress = (u32 *)0x24FFFF00;
-        u8 *payloadAddress = (u8 *)0x24F00000;
+        f_closedir(&dir);
 
-        memcpy(loaderAddress, loader_bin, loader_bin_size);
-
-        concatenateStrings(path, "/");
-        concatenateStrings(path, info.altname);
-
-        u32 payloadSize = fileRead(payloadAddress, path, (u8 *)loaderAddress - payloadAddress);
-
-        if(payloadSize > 0)
+        if(info.fname[0] != 0)
         {
-            loaderAddress[1] = payloadSize;
+            u32 *loaderAddress = (u32 *)0x24FFFE00;
+            u8 *payloadAddress = (u8 *)0x24F00000;
 
-            if(isA9lh) restoreShaHashBackup();
-            initScreens();
+            memcpy(loaderAddress, loader_bin, loader_bin_size);
 
-            flushDCacheRange(loaderAddress, loader_bin_size);
-            flushICacheRange(loaderAddress, loader_bin_size);
+            concatenateStrings(path, "/");
+            concatenateStrings(path, info.altname);
 
-            ((void (*)())loaderAddress)();
+            u32 payloadSize = fileRead(payloadAddress, path, (u32)((u8 *)loaderAddress - payloadAddress));
+
+            if(payloadSize > 0)
+            {
+                loaderAddress[1] = payloadSize;
+
+                backupAndRestoreShaHash(true);
+                initScreens();
+
+                flushDCacheRange(loaderAddress, loader_bin_size);
+                flushICacheRange(loaderAddress, loader_bin_size);
+
+                ((void (*)())loaderAddress)();
+            }
         }
     }
 }
@@ -158,68 +188,60 @@ u32 firmRead(void *dest, u32 firmType)
                                     { "00000003", "20000003" }};
 
     char path[48] = "1:/title/00040138/";
-    concatenateStrings(path, firmFolders[firmType][isN3DS ? 1 : 0]);
+    concatenateStrings(path, firmFolders[firmType][ISN3DS ? 1 : 0]);
     concatenateStrings(path, "/content");
 
     DIR dir;
-    FILINFO info;
-
-    f_opendir(&dir, path);
-
     u32 firmVersion = 0xFFFFFFFF;
 
-    //Parse the target directory
-    while(f_readdir(&dir, &info) == FR_OK && info.fname[0] != 0)
+    if(f_opendir(&dir, path) == FR_OK)
     {
-        //Not a cxi
-        if(info.fname[9] != 'a') continue;
+        FILINFO info;
 
-        //Convert the .app name to an integer
-        u32 tempVersion = 0;
-        for(char *tmp = info.altname; *tmp != '.'; tmp++)
+        //Parse the target directory
+        while(f_readdir(&dir, &info) == FR_OK && info.fname[0] != 0)
         {
-            tempVersion <<= 4;
-            tempVersion += *tmp > '9' ? *tmp - 'A' + 10 : *tmp - '0';
+            //Not a cxi
+            if(info.fname[9] != 'a' || strlen(info.fname) != 12) continue;
+
+            u32 tempVersion = hexAtoi(info.altname, 8);
+
+            //Found an older cxi
+            if(tempVersion < firmVersion) firmVersion = tempVersion;
         }
 
-        //Found an older cxi
-        if(tempVersion < firmVersion) firmVersion = tempVersion;
+        f_closedir(&dir);
+
+        if(firmVersion != 0xFFFFFFFF)
+        {
+            //Complete the string with the .app name
+            concatenateStrings(path, "/00000000.app");
+
+            //Convert back the .app name from integer to array
+            hexItoa(firmVersion, path + 35, 8, false);
+
+            if(fileRead(dest, path, 0x400000 + sizeof(Cxi) + 0x200) <= sizeof(Cxi) + 0x200) firmVersion = 0xFFFFFFFF;
+        }
     }
 
-    f_closedir(&dir);
-
-    //Complete the string with the .app name
-    concatenateStrings(path, "/00000000.app");
-
-    //Convert back the .app name from integer to array
-    hexItoa(firmVersion, &path[35], 8);
-
-    fileRead(dest, path, 0);
-
     return firmVersion;
 }
 
 void findDumpFile(const char *path, char *fileName)
 {
     DIR dir;
-    FILINFO info;
     FRESULT result;
     u32 n = 0;
 
-    while(true)
+    while(n <= 99999999)
     {
+        FILINFO info;
+
         result = f_findfirst(&dir, &info, path, fileName);
 
         if(result != FR_OK || !info.fname[0]) break;
 
-        u32 i = 18,
-            tmp = ++n;
-
-        while(tmp > 0)
-        {
-            fileName[i--] = '0' + (tmp % 10);
-            tmp /= 10;
-        }
+        decItoa(++n, fileName + 11, 8);
     }
 
     if(result == FR_OK) f_closedir(&dir);

source/fs.h

@@ -26,9 +26,7 @@
 
 #define PATTERN(a) a "_*.bin"
 
-extern bool isN3DS, isA9lh;
-
-void mountFs(void);
+bool mountFs(bool isSd, bool switchToCtrNand);
 u32 fileRead(void *dest, const char *path, u32 maxSize);
 u32 getFileSize(const char *path);
 bool fileWrite(const void *buffer, const char *path, u32 size);

source/main.c

@@ -0,0 +1,261 @@
+/*
+*   This file is part of Luma3DS
+*   Copyright (C) 2016 Aurora Wright, TuxSH
+*
+*   This program is free software: you can redistribute it and/or modify
+*   it under the terms of the GNU General Public License as published by
+*   the Free Software Foundation, either version 3 of the License, or
+*   (at your option) any later version.
+*
+*   This program is distributed in the hope that it will be useful,
+*   but WITHOUT ANY WARRANTY; without even the implied warranty of
+*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*   GNU General Public License for more details.
+*
+*   You should have received a copy of the GNU General Public License
+*   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*
+*   Additional Terms 7.b of GPLv3 applies to this file: Requiring preservation of specified
+*   reasonable legal notices or author attributions in that material or in the Appropriate Legal
+*   Notices displayed by works containing it.
+*/
+
+#include "config.h"
+#include "emunand.h"
+#include "fs.h"
+#include "firm.h"
+#include "utils.h"
+#include "exceptions.h"
+#include "draw.h"
+#include "strings.h"
+#include "buttons.h"
+#include "pin.h"
+
+extern CfgData configData;
+extern FirmwareSource firmSource;
+
+void main(void)
+{
+    bool isA9lhInstalled,
+         isSafeMode = false;
+    u32 configTemp,
+        emuHeader;
+    FirmwareType firmType;
+    FirmwareSource nandType;
+    ConfigurationStatus needConfig;
+
+    //Mount SD or CTRNAND
+    bool isSdMode;
+    if(mountFs(true, false)) isSdMode = true;
+    else
+    {
+        firmSource = FIRMWARE_SYSNAND;
+        if(!mountFs(false, true)) error("Failed to mount SD and CTRNAND.");
+        isSdMode = false;
+    }
+
+    //Attempt to read the configuration file
+    needConfig = readConfig() ? MODIFY_CONFIGURATION : CREATE_CONFIGURATION;
+
+    //Determine if this is a firmlaunch boot
+    if(ISFIRMLAUNCH)
+    {
+        if(needConfig == CREATE_CONFIGURATION) mcuPowerOff();
+
+        //'0' = NATIVE_FIRM, '1' = TWL_FIRM, '2' = AGB_FIRM
+        firmType = launchedFirmTidLow[7] == u'3' ? SAFE_FIRM : (FirmwareType)(launchedFirmTidLow[5] - u'0');
+
+        nandType = (FirmwareSource)BOOTCFG_NAND;
+        firmSource = (FirmwareSource)BOOTCFG_FIRM;
+        isA9lhInstalled = BOOTCFG_A9LH != 0;
+    }
+    else
+    {
+        if(ISA9LH)
+        {
+            detectAndProcessExceptionDumps();
+            installArm9Handlers();
+        }
+
+        firmType = NATIVE_FIRM;
+        isA9lhInstalled = ISA9LH;
+
+        //Get pressed buttons
+        u32 pressed = HID_PAD;
+
+        //Save old options and begin saving the new boot configuration
+        configTemp = (configData.config & 0xFFFFFF00) | ((u32)ISA9LH << 6);
+
+        //If it's a MCU reboot, try to force boot options
+        if(ISA9LH && CFG_BOOTENV && needConfig != CREATE_CONFIGURATION)
+        {
+            //Always force a SysNAND boot when quitting AGB_FIRM
+            if(CFG_BOOTENV == 7)
+            {
+                nandType = FIRMWARE_SYSNAND;
+                firmSource = (BOOTCFG_NAND != 0) == (BOOTCFG_FIRM != 0) ? FIRMWARE_SYSNAND : (FirmwareSource)BOOTCFG_FIRM;
+                needConfig = DONT_CONFIGURE;
+
+                //Flag to prevent multiple boot options-forcing
+                configTemp |= 1 << 7;
+            }
+
+            /* Else, force the last used boot options unless a button is pressed
+               or the no-forcing flag is set */
+            else if(!pressed && !BOOTCFG_NOFORCEFLAG)
+            {
+                nandType = (FirmwareSource)BOOTCFG_NAND;
+                firmSource = (FirmwareSource)BOOTCFG_FIRM;
+                needConfig = DONT_CONFIGURE;
+            }
+        }
+
+        //Boot options aren't being forced
+        if(needConfig != DONT_CONFIGURE)
+        {
+            u32 pinMode = MULTICONFIG(PIN);
+            bool pinExists = pinMode != 0 && verifyPin(pinMode);
+
+            //If no configuration file exists or SELECT is held, load configuration menu
+            bool shouldLoadConfigMenu = needConfig == CREATE_CONFIGURATION || ((pressed & (BUTTON_SELECT | BUTTON_L1)) == BUTTON_SELECT);
+
+            if(shouldLoadConfigMenu)
+            {
+                configMenu(isSdMode, pinExists, pinMode);
+
+                //Update pressed buttons
+                pressed = HID_PAD;
+            }
+
+            if(ISA9LH && !CFG_BOOTENV && pressed == SAFE_MODE)
+            {
+                nandType = FIRMWARE_SYSNAND;
+                firmSource = FIRMWARE_SYSNAND;
+
+                isSafeMode = true;
+
+                //If the PIN has been verified, wait to make it easier to press the SAFE_MODE combo
+                if(pinExists && !shouldLoadConfigMenu)
+                {
+                    while(HID_PAD & PIN_BUTTONS);
+                    chrono(2);
+                }
+            }
+            else
+            {
+                u32 splashMode = MULTICONFIG(SPLASH);
+
+                if(splashMode == 1 && loadSplash()) pressed = HID_PAD;
+
+                /* If L and R/A/Select or one of the single payload buttons are pressed,
+                   chainload an external payload */
+                bool shouldLoadPayload = ((pressed & SINGLE_PAYLOAD_BUTTONS) && !(pressed & (BUTTON_L1 | BUTTON_R1 | BUTTON_A))) ||
+                                         ((pressed & L_PAYLOAD_BUTTONS) && (pressed & BUTTON_L1));
+
+                if(shouldLoadPayload) loadPayload(pressed);
+
+                if(splashMode == 2) loadSplash();
+
+                //If booting from CTRNAND, always use SysNAND
+                if(!isSdMode) nandType = FIRMWARE_SYSNAND;
+
+                //If R is pressed, boot the non-updated NAND with the FIRM of the opposite one
+                else if(pressed & BUTTON_R1)
+                {
+                    if(CONFIG(USESYSFIRM))
+                    {
+                        nandType = FIRMWARE_EMUNAND;
+                        firmSource = FIRMWARE_SYSNAND;
+                    }
+                    else
+                    {
+                        nandType = FIRMWARE_SYSNAND;
+                        firmSource = FIRMWARE_EMUNAND;
+                    }
+                }
+
+                /* Else, boot the NAND the user set to autoboot or the opposite one, depending on L,
+                   with their own FIRM */
+                else firmSource = nandType = (CONFIG(AUTOBOOTSYS) == ((pressed & BUTTON_L1) == BUTTON_L1)) ? FIRMWARE_EMUNAND : FIRMWARE_SYSNAND;
+
+                //If we're booting EmuNAND or using EmuNAND FIRM, determine which one from the directional pad buttons, or otherwise from the config
+                if(nandType == FIRMWARE_EMUNAND || firmSource == FIRMWARE_EMUNAND)
+                {
+                    FirmwareSource tempNand;
+                    switch(pressed & EMUNAND_BUTTONS)
+                    {
+                        case BUTTON_UP:
+                            tempNand = FIRMWARE_EMUNAND;
+                            break;
+                        case BUTTON_RIGHT:
+                            tempNand = FIRMWARE_EMUNAND2;
+                            break;
+                        case BUTTON_DOWN:
+                            tempNand = FIRMWARE_EMUNAND3;
+                            break;
+                        case BUTTON_LEFT:
+                            tempNand = FIRMWARE_EMUNAND4;
+                            break;
+                        default:
+                            tempNand = (FirmwareSource)(1 + MULTICONFIG(DEFAULTEMU));
+                            break;
+                    }
+
+                    if(nandType == FIRMWARE_EMUNAND) nandType = tempNand;
+                    else firmSource = tempNand;
+                }
+            }
+        }
+    }
+
+    //If we need to boot EmuNAND, make sure it exists
+    if(nandType != FIRMWARE_SYSNAND)
+    {
+        locateEmuNand(&emuHeader, &nandType);
+        if(nandType == FIRMWARE_SYSNAND) firmSource = FIRMWARE_SYSNAND;
+    }
+
+    //Same if we're using EmuNAND as the FIRM source
+    else if(firmSource != FIRMWARE_SYSNAND)
+        locateEmuNand(&emuHeader, &firmSource);
+
+    if(!ISFIRMLAUNCH)
+    {
+        configTemp |= (u32)nandType | ((u32)firmSource << 3);
+        writeConfig(needConfig, configTemp);
+    }
+
+    if(isSdMode && !mountFs(false, false)) error("Failed to mount CTRNAND.");
+
+    bool loadFromStorage = CONFIG(LOADEXTFIRMSANDMODULES);
+    u32 firmVersion = loadFirm(&firmType, firmSource, loadFromStorage, isSafeMode);
+
+    u32 devMode = MULTICONFIG(DEVOPTIONS);
+
+    u32 res;
+    switch(firmType)
+    {
+        case NATIVE_FIRM:
+            res = patchNativeFirm(firmVersion, nandType, emuHeader, isA9lhInstalled, isSafeMode, devMode);
+            break;
+        case SAFE_FIRM:
+        case NATIVE_FIRM1X2X:
+            res = isA9lhInstalled ? patch1x2xNativeAndSafeFirm(devMode) : 0;
+            break;
+        case TWL_FIRM:
+            res = patchTwlFirm(firmVersion, devMode);
+            break;
+        case AGB_FIRM:
+            res = patchAgbFirm(devMode);
+            break;
+    }
+
+    if(res != 0)
+    {
+        char patchesError[] = "Failed to apply    FIRM patch(es).";
+        decItoa(res, patchesError + 16, 2);
+        error(patchesError);
+    }
+
+    launchFirm(firmType, loadFromStorage);
+}

source/patches.c

@@ -21,277 +21,382 @@
 */
 
 /*
+*   Signature patches by an unknown author
+*   firmlaunches patching code originally by delebile
+*   FIRM partition writes patches by delebile
 *   ARM11 modules patching code originally by Subv
+*   Idea for svcBreak patches from yellows8 and others on #3dsdev
 */
 
 #include "patches.h"
 #include "fs.h"
 #include "memory.h"
 #include "config.h"
+#include "utils.h"
 #include "../build/bundled.h"
 
-u8 *getProcess9(u8 *pos, u32 size, u32 *process9Size, u32 *process9MemAddr)
+u8 *getProcess9Info(u8 *pos, u32 size, u32 *process9Size, u32 *process9MemAddr)
 {
-    u8 *off = memsearch(pos, "ess9", size, 4);
+    u8 *temp = memsearch(pos, "NCCH", size, 4);
 
-    *process9Size = *(u32 *)(off - 0x60) * 0x200;
-    *process9MemAddr = *(u32 *)(off + 0xC);
+    if(temp == NULL) error("Failed to get Process9 data.");
 
-    //Process9 code offset (start of NCCH + ExeFS offset + ExeFS header size)
-    return off - 0x204 + (*(u32 *)(off - 0x64) * 0x200) + 0x200;
+    Cxi *off = (Cxi *)(temp - 0x100);
+
+    *process9Size = (off->ncch.exeFsSize - 1) * 0x200;
+    *process9MemAddr = off->exHeader.systemControlInfo.textCodeSet.address;
+
+    return (u8 *)off + (off->ncch.exeFsOffset + 1) * 0x200;
 }
 
 u32 *getKernel11Info(u8 *pos, u32 size, u32 *baseK11VA, u8 **freeK11Space, u32 **arm11SvcHandler, u32 **arm11ExceptionsPage)
-{    
+{
     const u8 pattern[] = {0x00, 0xB0, 0x9C, 0xE5};
+    bool res = true;
 
-    *arm11ExceptionsPage = (u32 *)memsearch(pos, pattern, size, sizeof(pattern)) - 0xB;
+    *arm11ExceptionsPage = (u32 *)memsearch(pos, pattern, size, sizeof(pattern));
 
-    u32 svcOffset = (-(((*arm11ExceptionsPage)[2] & 0xFFFFFF) << 2) & (0xFFFFFF << 2)) - 8; //Branch offset + 8 for prefetch
-    u32 pointedInstructionVA = 0xFFFF0008 - svcOffset;
-    *baseK11VA = pointedInstructionVA & 0xFFFF0000; //This assumes that the pointed instruction has an offset < 0x10000, iirc that's always the case
-    u32 *arm11SvcTable = (u32 *)(pos + *(u32 *)(pos + pointedInstructionVA - *baseK11VA + 8) - *baseK11VA); //SVC handler address
-    *arm11SvcHandler = arm11SvcTable;
-    while(*arm11SvcTable) arm11SvcTable++; //Look for SVC0 (NULL)
+    u32 *arm11SvcTable;
+
+    if(*arm11ExceptionsPage == NULL) res = false;
+    else
+    {
+        *arm11ExceptionsPage -= 0xB;
+        u32 svcOffset = (-(((*arm11ExceptionsPage)[2] & 0xFFFFFF) << 2) & (0xFFFFFF << 2)) - 8; //Branch offset + 8 for prefetch
+        u32 pointedInstructionVA = 0xFFFF0008 - svcOffset;
+        *baseK11VA = pointedInstructionVA & 0xFFFF0000; //This assumes that the pointed instruction has an offset < 0x10000, iirc that's always the case
+        arm11SvcTable = *arm11SvcHandler = (u32 *)(pos + *(u32 *)(pos + pointedInstructionVA - *baseK11VA + 8) - *baseK11VA); //SVC handler address
+        while(*arm11SvcTable) arm11SvcTable++; //Look for SVC0 (NULL)
+    }
 
     const u8 pattern2[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
 
-    *freeK11Space = memsearch(pos, pattern2, size, sizeof(pattern2)) + 1;
+    *freeK11Space = memsearch(pos, pattern2, size, sizeof(pattern2));
+
+    if(*freeK11Space == NULL) res = false;
+    else (*freeK11Space)++;
+
+    if(!res) error("Failed to get Kernel11 data.");
 
     return arm11SvcTable;
 }
 
-void patchSignatureChecks(u8 *pos, u32 size)
+u32 patchSignatureChecks(u8 *pos, u32 size)
 {
     //Look for signature checks
     const u8 pattern[] = {0xC0, 0x1C, 0x76, 0xE7},
              pattern2[] = {0xB5, 0x22, 0x4D, 0x0C};
+    u32 ret;
 
-    u16 *off = (u16 *)memsearch(pos, pattern, size, sizeof(pattern)),
-        *off2 = (u16 *)(memsearch(pos, pattern2, size, sizeof(pattern2)) - 1);
+    u16 *off = (u16 *)memsearch(pos, pattern, size, sizeof(pattern));
+    u8 *temp = memsearch(pos, pattern2, size, sizeof(pattern2));
 
-    *off = off2[0] = 0x2000;
-    off2[1] = 0x4770;
+    if(off == NULL || temp == NULL) ret = 1;
+    else
+    {
+        u16 *off2 = (u16 *)(temp - 1);
+
+        *off = off2[0] = 0x2000;
+        off2[1] = 0x4770;
+
+        ret = 0;
+    }
+
+    return ret;
 }
 
-void patchFirmlaunches(u8 *pos, u32 size, u32 process9MemAddr)
+u32 patchFirmlaunches(u8 *pos, u32 size, u32 process9MemAddr)
 {
     //Look for firmlaunch code
     const u8 pattern[] = {0xE2, 0x20, 0x20, 0x90};
-
-    u8 *off = memsearch(pos, pattern, size, sizeof(pattern)) - 0x13;
-
-    //Firmlaunch function offset - offset in BLX opcode (A4-16 - ARM DDI 0100E) + 1
-    u32 fOpenOffset = (u32)(off + 9 - (-((*(u32 *)off & 0x00FFFFFF) << 2) & (0xFFFFFF << 2)) - pos + process9MemAddr);
-
-    //Copy firmlaunch code
-    memcpy(off, reboot_bin, reboot_bin_size);
-
-    //Put the fOpen offset in the right location
-    u32 *pos_fopen = (u32 *)memsearch(off, "OPEN", reboot_bin_size, 4);
-    *pos_fopen = fOpenOffset;
-
-    if(CONFIG(USECUSTOMPATH))
-    {
-        const char pathPath[] = "/luma/path.txt";
-
-        u32 pathSize = getFileSize(pathPath);
-
-        if(pathSize > 5 && pathSize < 58)
-        {
-            u8 path[pathSize];
-            fileRead(path, pathPath, 0);
-            if(path[pathSize - 1] == 0xA) pathSize--;
-            if(path[pathSize - 1] == 0xD) pathSize--;
-
-            if(pathSize > 5 && pathSize < 56 && path[0] == '/' && memcmp(&path[pathSize - 4], ".bin", 4) == 0)
-            {
-                u16 finalPath[pathSize + 1];
-                for(u32 i = 0; i < pathSize; i++)
-                    finalPath[i] = (u16)path[i];
-                finalPath[pathSize] = 0;
-
-                u8 *pos_path = memsearch(off, u"sd", reboot_bin_size, 4) + 0xA;
-                memcpy(pos_path, finalPath, (pathSize + 1) * 2);
-            }
-        }
-    }
-}
-
-void patchFirmWrites(u8 *pos, u32 size)
-{
-    //Look for FIRM writing code
-    u8 *off1 = memsearch(pos, "exe:", size, 4);
-    const u8 pattern[] = {0x00, 0x28, 0x01, 0xDA};
-
-    u16 *off2 = (u16 *)memsearch(off1 - 0x100, pattern, 0x100, sizeof(pattern));
-
-    off2[0] = 0x2000;
-    off2[1] = 0x46C0;
-}
-
-void patchOldFirmWrites(u8 *pos, u32 size)
-{
-    //Look for FIRM writing code
-    const u8 pattern[] = {0x04, 0x1E, 0x1D, 0xDB};
-
-    u16 *off = (u16 *)memsearch(pos, pattern, size, sizeof(pattern));
-
-    off[0] = 0x2400;
-    off[1] = 0xE01D;
-}
-
-void reimplementSvcBackdoor(u8 *pos, u32 *arm11SvcTable, u32 baseK11VA, u8 **freeK11Space)
-{
-    //Official implementation of svcBackdoor
-    const u8 svcBackdoor[40] = {0xFF, 0x10, 0xCD, 0xE3,  //bic   r1, sp, #0xff
-                                0x0F, 0x1C, 0x81, 0xE3,  //orr   r1, r1, #0xf00
-                                0x28, 0x10, 0x81, 0xE2,  //add   r1, r1, #0x28
-                                0x00, 0x20, 0x91, 0xE5,  //ldr   r2, [r1]
-                                0x00, 0x60, 0x22, 0xE9,  //stmdb r2!, {sp, lr}
-                                0x02, 0xD0, 0xA0, 0xE1,  //mov   sp, r2
-                                0x30, 0xFF, 0x2F, 0xE1,  //blx   r0
-                                0x03, 0x00, 0xBD, 0xE8,  //pop   {r0, r1}
-                                0x00, 0xD0, 0xA0, 0xE1,  //mov   sp, r0
-                                0x11, 0xFF, 0x2F, 0xE1}; //bx    r1
-
-    if(!arm11SvcTable[0x7B])
-    {
-        memcpy(*freeK11Space, svcBackdoor, 40);
-
-        arm11SvcTable[0x7B] = baseK11VA + *freeK11Space - pos;
-        *freeK11Space += 40;
-    }
-}
-
-void implementSvcGetCFWInfo(u8 *pos, u32 *arm11SvcTable, u32 baseK11VA, u8 **freeK11Space)
-{
-    memcpy(*freeK11Space, svcGetCFWInfo_bin, svcGetCFWInfo_bin_size);
-
-    CFWInfo *info = (CFWInfo *)memsearch(*freeK11Space, "LUMA", svcGetCFWInfo_bin_size, 4);
-
-    const char *rev = REVISION;
-
-    info->commitHash = COMMIT_HASH;
-    info->config = configData.config;
-    info->versionMajor = (u8)(rev[1] - '0');
-    info->versionMinor = (u8)(rev[3] - '0');
-
-    bool isRelease;
-
-    if(rev[4] == '.')
-    {
-        info->versionBuild = (u8)(rev[5] - '0');
-        isRelease = rev[6] == 0;
-    }
-    else isRelease = rev[4] == 0;
-
-    info->flags = isRelease ? 1 : 0;
-
-    arm11SvcTable[0x2E] = baseK11VA + *freeK11Space - pos; //Stubbed svc
-    *freeK11Space += svcGetCFWInfo_bin_size;
-}
-
-void patchTitleInstallMinVersionCheck(u8 *pos, u32 size)
-{
-    const u8 pattern[] = {0x0A, 0x81, 0x42, 0x02};
+    u32 ret;
 
     u8 *off = memsearch(pos, pattern, size, sizeof(pattern));
 
-    if(off != NULL) off[4] = 0xE0;
-}
-
-void applyLegacyFirmPatches(u8 *pos, FirmwareType firmType)
-{
-    const patchData twlPatches[] = {
-        {{0x1650C0, 0x165D64}, {{ 6, 0x00, 0x20, 0x4E, 0xB0, 0x70, 0xBD }}, 0},
-        {{0x173A0E, 0x17474A}, { .type1 = 0x2001 }, 1},
-        {{0x174802, 0x17553E}, { .type1 = 0x2000 }, 2},
-        {{0x174964, 0x1756A0}, { .type1 = 0x2000 }, 2},
-        {{0x174D52, 0x175A8E}, { .type1 = 0x2001 }, 2},
-        {{0x174D5E, 0x175A9A}, { .type1 = 0x2001 }, 2},
-        {{0x174D6A, 0x175AA6}, { .type1 = 0x2001 }, 2},
-        {{0x174E56, 0x175B92}, { .type1 = 0x2001 }, 1},
-        {{0x174E58, 0x175B94}, { .type1 = 0x4770 }, 1}
-    },
-    agbPatches[] = {
-        {{0x9D2A8, 0x9DF64}, {{ 6, 0x00, 0x20, 0x4E, 0xB0, 0x70, 0xBD }}, 0},
-        {{0xD7A12, 0xD8B8A}, { .type1 = 0xEF26 }, 1}
-    };
-
-    /* Calculate the amount of patches to apply. Only count the boot screen patch for AGB_FIRM
-       if the matching option was enabled (keep it as last) */
-    u32 numPatches = firmType == TWL_FIRM ? (sizeof(twlPatches) / sizeof(patchData)) :
-                                            (sizeof(agbPatches) / sizeof(patchData) - !CONFIG(SHOWGBABOOT));
-    const patchData *patches = firmType == TWL_FIRM ? twlPatches : agbPatches;
-
-    //Patch
-    for(u32 i = 0; i < numPatches; i++)
+    if(off == NULL) ret = 1;
+    else
     {
-        switch(patches[i].type)
+        off -= 0x13;
+
+        //Firmlaunch function offset - offset in BLX opcode (A4-16 - ARM DDI 0100E) + 1
+        u32 fOpenOffset = (u32)(off + 9 - (-((*(u32 *)off & 0x00FFFFFF) << 2) & (0xFFFFFF << 2)) - pos + process9MemAddr);
+
+        //Copy firmlaunch code
+        memcpy(off, reboot_bin, reboot_bin_size);
+
+        //Put the fOpen offset in the right location
+        u32 *pos_fopen = (u32 *)memsearch(off, "OPEN", reboot_bin_size, 4);
+        *pos_fopen = fOpenOffset;
+
+        ret = 0;
+
+        if(CONFIG(USECUSTOMPATH))
         {
-            case 0:
-                memcpy(pos + patches[i].offset[isN3DS ? 1 : 0], patches[i].patch.type0 + 1, patches[i].patch.type0[0]);
-                break;
-            case 2:
-                *(u16 *)(pos + patches[i].offset[isN3DS ? 1 : 0] + 2) = 0;
-            case 1:
-                *(u16 *)(pos + patches[i].offset[isN3DS ? 1 : 0]) = patches[i].patch.type1;
-                break;
+            const char *pathFile = "path.txt";
+
+            u32 pathSize = getFileSize(pathFile);
+
+            if(pathSize > 5 && pathSize < 58)
+            {
+                u8 path[pathSize];
+                fileRead(path, pathFile, pathSize);
+                if(path[pathSize - 1] == 0xA) pathSize--;
+                if(path[pathSize - 1] == 0xD) pathSize--;
+
+                if(pathSize > 5 && pathSize < 56 && path[0] == '/' && memcmp(&path[pathSize - 4], ".bin", 4) == 0)
+                {
+                    u16 finalPath[pathSize];
+                    for(u32 i = 0; i < pathSize; i++)
+                        finalPath[i] = (u16)path[i];
+
+                    u8 *pos_path = memsearch(off, u"sd", reboot_bin_size, 4) + 0xA;
+                    memcpy(pos_path, finalPath, pathSize * 2);
+                }
+            }
         }
     }
+
+    return ret;
 }
 
-void patchArm9ExceptionHandlersInstall(u8 *pos, u32 size)
+u32 patchFirmWrites(u8 *pos, u32 size)
 {
-    const u8 pattern[] = {0x03, 0xA0, 0xE3, 0x18};
+    u32 ret;
 
-    u32 *off = (u32 *)(memsearch(pos, pattern, size, sizeof(pattern)) + 0x13);
+    //Look for FIRM writing code
+    u8 *off = memsearch(pos, "exe:", size, 4);
 
-    for(u32 r0 = 0x08000000; *off != 0xE3A01040; off++) //Until mov r1, #0x40
+    if(off == NULL) ret = 1;
+    else
     {
-        //Discard everything that's not str rX, [r0, #imm](!)
-        if((*off & 0xFE5F0000) != 0xE4000000) continue;
+        const u8 pattern[] = {0x00, 0x28, 0x01, 0xDA};
 
-        u32 rD = (*off >> 12) & 0xF,
-            offset = (*off & 0xFFF) * ((((*off >> 23) & 1) == 0) ? -1 : 1);
-        bool writeback = ((*off >> 21) & 1) != 0,
-             pre = ((*off >> 24) & 1) != 0;
+        u16 *off2 = (u16 *)memsearch(off - 0x100, pattern, 0x100, sizeof(pattern));
 
-        u32 addr = r0 + ((pre || !writeback) ? offset : 0);
-        if((addr & 7) != 0 && addr != 0x08000014 && addr != 0x08000004) *off = 0xE1A00000; //nop
-        else *off = 0xE5800000 | (rD << 12) | (addr & 0xFFF); //Preserve IRQ and SVC handlers
+        if(off2 == NULL) ret = 1;
+        else
+        {
+            off2[0] = 0x2000;
+            off2[1] = 0x46C0;
 
-        if(!pre) addr += offset;
-        if(writeback) r0 = addr;
+            ret = 0;
+        }
     }
+
+    return ret;
+}
+
+u32 patchOldFirmWrites(u8 *pos, u32 size)
+{
+    //Look for FIRM writing code
+    const u8 pattern[] = {0x04, 0x1E, 0x1D, 0xDB};
+    u32 ret;
+
+    u16 *off = (u16 *)memsearch(pos, pattern, size, sizeof(pattern));
+
+    if(off == NULL) ret = 1;
+    else
+    {
+        off[0] = 0x2400;
+        off[1] = 0xE01D;
+
+        ret = 0;
+    }
+
+    return ret;
+}
+
+u32 reimplementSvcBackdoor(u8 *pos, u32 *arm11SvcTable, u32 baseK11VA, u8 **freeK11Space)
+{
+    u32 ret = 0;
+
+    //Official implementation of svcBackdoor
+    const u8 svcBackdoor[] = {0xFF, 0x10, 0xCD, 0xE3,  //bic   r1, sp, #0xff
+                              0x0F, 0x1C, 0x81, 0xE3,  //orr   r1, r1, #0xf00
+                              0x28, 0x10, 0x81, 0xE2,  //add   r1, r1, #0x28
+                              0x00, 0x20, 0x91, 0xE5,  //ldr   r2, [r1]
+                              0x00, 0x60, 0x22, 0xE9,  //stmdb r2!, {sp, lr}
+                              0x02, 0xD0, 0xA0, 0xE1,  //mov   sp, r2
+                              0x30, 0xFF, 0x2F, 0xE1,  //blx   r0
+                              0x03, 0x00, 0xBD, 0xE8,  //pop   {r0, r1}
+                              0x00, 0xD0, 0xA0, 0xE1,  //mov   sp, r0
+                              0x11, 0xFF, 0x2F, 0xE1}; //bx    r1
+
+    if(!arm11SvcTable[0x7B])
+    {
+        if(*(u32 *)(*freeK11Space + sizeof(svcBackdoor) - 4) != 0xFFFFFFFF) ret = 1;
+        else
+        {
+            memcpy(*freeK11Space, svcBackdoor, sizeof(svcBackdoor));
+
+            arm11SvcTable[0x7B] = baseK11VA + *freeK11Space - pos;
+            *freeK11Space += sizeof(svcBackdoor);
+        }
+    }
+
+    return ret;
+}
+
+u32 implementSvcGetCFWInfo(u8 *pos, u32 *arm11SvcTable, u32 baseK11VA, u8 **freeK11Space, bool isSafeMode)
+{
+    u32 ret;
+
+    if(*(u32 *)(*freeK11Space + svcGetCFWInfo_bin_size - 4) != 0xFFFFFFFF) ret = 1;
+    else
+    {
+        memcpy(*freeK11Space, svcGetCFWInfo_bin, svcGetCFWInfo_bin_size);
+
+        struct CfwInfo
+        {
+            char magic[4];
+
+            u8 versionMajor;
+            u8 versionMinor;
+            u8 versionBuild;
+            u8 flags;
+
+            u32 commitHash;
+
+            u32 config;
+        } __attribute__((packed)) *info = (struct CfwInfo *)memsearch(*freeK11Space, "LUMA", svcGetCFWInfo_bin_size, 4);
+
+        const char *rev = REVISION;
+
+        info->commitHash = COMMIT_HASH;
+        info->config = configData.config;
+        info->versionMajor = (u8)(rev[1] - '0');
+        info->versionMinor = (u8)(rev[3] - '0');
+
+        bool isRelease;
+
+        if(rev[4] == '.')
+        {
+            info->versionBuild = (u8)(rev[5] - '0');
+            isRelease = rev[6] == 0;
+        }
+        else isRelease = rev[4] == 0;
+
+        if(isRelease) info->flags = 1;
+
+        if(ISN3DS) info->flags |= 1 << 4;
+
+        if(isSafeMode) info->flags |= 1 << 5;
+
+        arm11SvcTable[0x2E] = baseK11VA + *freeK11Space - pos; //Stubbed svc
+        *freeK11Space += svcGetCFWInfo_bin_size;
+
+        ret = 0;
+    }
+
+    return ret;
+}
+
+u32 patchTitleInstallMinVersionChecks(u8 *pos, u32 size, u32 firmVersion)
+{
+    const u8 pattern[] = {0xFF, 0x00, 0x00, 0x02};
+    u32 ret;
+
+    u8 *off = memsearch(pos, pattern, size, sizeof(pattern));
+
+    if(off == NULL) ret = firmVersion == 0xFFFFFFFF ? 0 : 1;
+    else
+    {
+        off++;
+
+        memset32(off, 0, 8); //Zero out the first TitleID in the list
+
+        ret = 0;
+    }
+
+    return ret;
+}
+
+u32 patchArm9ExceptionHandlersInstall(u8 *pos, u32 size)
+{
+    const u8 pattern[] = {0x80, 0xE5, 0x40, 0x1C};
+    u32 ret;
+
+    u8 *temp = memsearch(pos, pattern, size, sizeof(pattern));
+
+    if(temp == NULL) ret = 1;
+    else
+    {
+        u32 *off = (u32 *)(temp - 0xA);
+
+        for(u32 r0 = 0x08000000; *off != 0xE3A01040; off++) //Until mov r1, #0x40
+        {
+            //Discard everything that's not str rX, [r0, #imm](!)
+            if((*off & 0xFE5F0000) == 0xE4000000)
+            {
+                u32 rD = (*off >> 12) & 0xF,
+                    offset = (*off & 0xFFF) * ((((*off >> 23) & 1) == 0) ? -1 : 1);
+                bool writeback = ((*off >> 21) & 1) != 0,
+                     pre = ((*off >> 24) & 1) != 0;
+
+                u32 addr = r0 + ((pre || !writeback) ? offset : 0);
+                if((addr & 7) != 0 && addr != 0x08000014 && addr != 0x08000004) *off = 0xE1A00000; //nop
+                else *off = 0xE5800000 | (rD << 12) | (addr & 0xFFF); //Preserve IRQ and SVC handlers
+
+                if(!pre) addr += offset;
+                if(writeback) r0 = addr;
+            }
+        }
+
+        ret = 0;
+    }
+
+    return ret;
 }
 
 u32 getInfoForArm11ExceptionHandlers(u8 *pos, u32 size, u32 *codeSetOffset)
 {
-    const u8 pattern[] = {0xE3, 0xDC, 0x05, 0xC0}, //Get TitleID from CodeSet
-             pattern2[] = {0xE1, 0x0F, 0x00, 0xBD}; //Call exception dispatcher
+    const u8 pattern[] = {0x1B, 0x50, 0xA0, 0xE3}, //Get TitleID from CodeSet
+             pattern2[] = {0xE8, 0x13, 0x00, 0x02}; //Call exception dispatcher
+    bool ret = true;
 
-    u32 *loadCodeSet = (u32 *)(memsearch(pos, pattern, size, sizeof(pattern)) - 0xB);
+    u32 *loadCodeSet = (u32 *)memsearch(pos, pattern, size, sizeof(pattern));
 
-    *codeSetOffset = *loadCodeSet & 0xFFF;
+    if(loadCodeSet == NULL) ret = false;
+    else
+    {
+        loadCodeSet -= 2;
+        *codeSetOffset = *loadCodeSet & 0xFFF;
+    }
 
-    return *(u32 *)(memsearch(pos, pattern2, size, sizeof(pattern2)) + 0xD);
+    u8 *temp = memsearch(pos, pattern2, size, sizeof(pattern2));
+
+    u32 stackAddress;
+
+    if(temp == NULL) ret = false;
+    else stackAddress = *(u32 *)(temp + 9);
+
+    if(!ret) error("Failed to get ARM11 exception handlers data.");
+
+    return stackAddress;
 }
 
-void patchSvcBreak9(u8 *pos, u32 size, u32 kernel9Address)
+u32 patchSvcBreak9(u8 *pos, u32 size, u32 kernel9Address)
 {
-    /* Stub svcBreak with "bkpt 65535" so we can debug the panic.
-       Thanks @yellows8 and others for mentioning this idea on #3dsdev */
+    //Stub svcBreak with "bkpt 65535" so we can debug the panic
 
     //Look for the svc handler
     const u8 pattern[] = {0x00, 0xE0, 0x4F, 0xE1}; //mrs lr, spsr
+    u32 ret;
 
     u32 *arm9SvcTable = (u32 *)memsearch(pos, pattern, size, sizeof(pattern));
-    while(*arm9SvcTable) arm9SvcTable++; //Look for SVC0 (NULL)
 
-    u32 *addr = (u32 *)(pos + arm9SvcTable[0x3C] - kernel9Address);
-    *addr = 0xE12FFF7F;
+    if(arm9SvcTable == NULL) ret = 1;
+    else
+    {
+        while(*arm9SvcTable != 0) arm9SvcTable++; //Look for SVC0 (NULL)
+
+        u32 *addr = (u32 *)(pos + arm9SvcTable[0x3C] - kernel9Address);
+        *addr = 0xE12FFF7F;
+
+        ret = 0;
+    }
+
+    return ret;
 }
 
 void patchSvcBreak11(u8 *pos, u32 *arm11SvcTable)
@@ -301,68 +406,294 @@ void patchSvcBreak11(u8 *pos, u32 *arm11SvcTable)
     *addr = 0xE12FFF7F;
 }
 
-void patchKernel9Panic(u8 *pos, u32 size)
+u32 patchKernel9Panic(u8 *pos, u32 size)
 {
     const u8 pattern[] = {0xFF, 0xEA, 0x04, 0xD0};
+    u32 ret;
 
-    u32 *off = (u32 *)(memsearch(pos, pattern, size, sizeof(pattern)) - 0x12);
-    *off = 0xE12FFF7E;
+    u8 *temp = memsearch(pos, pattern, size, sizeof(pattern));
+
+    if(temp == NULL) ret = 1;
+    else
+    {
+        u32 *off = (u32 *)(temp - 0x12);
+        *off = 0xE12FFF7E;
+
+        ret = 0;
+    }
+
+    return ret;
 }
 
-void patchKernel11Panic(u8 *pos, u32 size)
+u32 patchKernel11Panic(u8 *pos, u32 size)
 {
     const u8 pattern[] = {0x02, 0x0B, 0x44, 0xE2};
+    u32 ret;
 
     u32 *off = (u32 *)memsearch(pos, pattern, size, sizeof(pattern));
-    *off = 0xE12FFF7E;
+
+    if(off == NULL) ret = 1;
+    else
+    {
+        *off = 0xE12FFF7E;
+
+        ret = 0;
+    }
+
+    return ret;
 }
 
-void patchP9AccessChecks(u8 *pos, u32 size)
+u32 patchP9AccessChecks(u8 *pos, u32 size)
 {
-    const u8 pattern[] = {0xE0, 0x00, 0x40, 0x39};
+    const u8 pattern[] = {0x00, 0x08, 0x49, 0x68};
+    u32 ret;
 
-    u16 *off = (u16 *)memsearch(pos, pattern, size, sizeof(pattern)) - 7;
+    u8 *temp = memsearch(pos, pattern, size, sizeof(pattern));
 
-    off[0] = 0x2001; //mov r0, #1
-    off[1] = 0x4770; //bx lr
+    if(temp == NULL) ret = 1;
+    else
+    {
+        u16 *off = (u16 *)(temp - 3);
+
+        off[0] = 0x2001; //mov r0, #1
+        off[1] = 0x4770; //bx lr
+
+        ret = 0;
+    }
+
+    return ret;
 }
 
-void patchArm11SvcAccessChecks(u32 *arm11SvcHandler)
+u32 patchArm11SvcAccessChecks(u32 *arm11SvcHandler, u32 *endPos)
 {
-    while(*arm11SvcHandler != 0xE11A0E1B) arm11SvcHandler++; //TST R10, R11,LSL LR
-    *arm11SvcHandler = 0xE3B0A001; //MOVS R10, #1
+    u32 ret;
+
+    while(*arm11SvcHandler != 0xE11A0E1B && arm11SvcHandler < endPos) arm11SvcHandler++; //TST R10, R11,LSL LR
+
+    if(arm11SvcHandler == endPos) ret = 1;
+    else
+    {
+        *arm11SvcHandler = 0xE3B0A001; //MOVS R10, #1
+
+        ret = 0;
+    }
+
+    return ret;
 }
 
-void patchK11ModuleChecks(u8 *pos, u32 size, u8 **freeK11Space)
+u32 patchK11ModuleChecks(u8 *pos, u32 size, u8 **freeK11Space)
 {
     /* We have to detour a function in the ARM11 kernel because builtin modules
        are compressed in memory and are only decompressed at runtime */
 
-    //Check that we have enough free space
-    if(*(u32 *)(*freeK11Space + k11modules_bin_size - 4) == 0xFFFFFFFF)
-    {
-        //Inject our code into the free space
-        memcpy(*freeK11Space, k11modules_bin, k11modules_bin_size);
+    u32 ret;
 
+    //Check that we have enough free space
+    if(*(u32 *)(*freeK11Space + k11modules_bin_size - 4) != 0xFFFFFFFF) ret = 0;
+    else
+    {
         //Look for the code that decompresses the .code section of the builtin modules
         const u8 pattern[] = {0xE5, 0x48, 0x00, 0x9D};
 
-        u32 *off = (u32 *)(memsearch(pos, pattern, size, sizeof(pattern)) - 0xB);
+        u8 *temp = memsearch(pos, pattern, size, sizeof(pattern));
 
-        //Inject a jump (BL) instruction to our code at the offset we found
-        *off = 0xEB000000 | (((((u32)*freeK11Space) - ((u32)off + 8)) >> 2) & 0xFFFFFF);
+        if(temp == NULL) ret = 1;
+        else
+        {
+            //Inject our code into the free space
+            memcpy(*freeK11Space, k11modules_bin, k11modules_bin_size);
 
-        *freeK11Space += k11modules_bin_size;
+            u32 *off = (u32 *)(temp - 0xB);
+
+            //Inject a jump (BL) instruction to our code at the offset we found
+            *off = 0xEB000000 | (((((u32)*freeK11Space) - ((u32)off + 8)) >> 2) & 0xFFFFFF);
+
+            *freeK11Space += k11modules_bin_size;
+
+            ret = 0;
+        }
     }
+
+    return ret;
 }
 
-void patchUnitInfoValueSet(u8 *pos, u32 size)
+u32 patchUnitInfoValueSet(u8 *pos, u32 size)
 {
     //Look for UNITINFO value being set during kernel sync
     const u8 pattern[] = {0x01, 0x10, 0xA0, 0x13};
+    u32 ret;
 
     u8 *off = memsearch(pos, pattern, size, sizeof(pattern));
 
-    off[0] = isDevUnit ? 0 : 1;
-    off[3] = 0xE3;
+    if(off == NULL) ret = 1;
+    else
+    {
+        off[0] = ISDEVUNIT ? 0 : 1;
+        off[3] = 0xE3;
+
+        ret = 0;
+    }
+
+    return ret;
+}
+
+u32 patchLgySignatureChecks(u8 *pos, u32 size)
+{
+    const u8 pattern[] = {0x47, 0xC1, 0x17, 0x49};
+    u32 ret;
+
+    u8 *temp = memsearch(pos, pattern, size, sizeof(pattern));
+
+    if(temp == NULL) ret = 1;
+    else
+    {
+        u16 *off = (u16 *)(temp + 1);
+
+        off[0] = 0x2000;
+        off[1] = 0xB04E;
+        off[2] = 0xBD70;
+
+        ret = 0;
+    }
+
+    return ret;
+}
+
+u32 patchTwlInvalidSignatureChecks(u8 *pos, u32 size)
+{
+    const u8 pattern[] = {0x20, 0xF6, 0xE7, 0x7F};
+    u32 ret;
+
+    u8 *temp = memsearch(pos, pattern, size, sizeof(pattern));
+
+    if(temp == NULL) ret = 1;
+    else
+    {
+        u16 *off = (u16 *)(temp - 1);
+
+        *off = 0x2001; //mov r0, #1
+
+        ret = 0;
+    }
+
+    return ret;
+}
+
+u32 patchTwlNintendoLogoChecks(u8 *pos, u32 size)
+{
+    const u8 pattern[] = {0xC0, 0x30, 0x06, 0xF0};
+    u32 ret;
+
+    u16 *off = (u16 *)memsearch(pos, pattern, size, sizeof(pattern));
+
+    if(off == NULL) ret = 1;
+    else
+    {
+        off[1] = 0x2000;
+        off[2] = 0;
+
+        ret = 0;
+    }
+
+    return ret;
+}
+
+u32 patchTwlWhitelistChecks(u8 *pos, u32 size)
+{
+    const u8 pattern[] = {0x22, 0x00, 0x20, 0x30};
+    u32 ret;
+
+    u16 *off = (u16 *)memsearch(pos, pattern, size, sizeof(pattern));
+
+    if(off == NULL) ret = 1;
+    else
+    {
+        off[2] = 0x2000;
+        off[3] = 0;
+
+        ret = 0;
+    }
+
+    return ret;
+}
+
+u32 patchTwlFlashcartChecks(u8 *pos, u32 size, u32 firmVersion)
+{
+    const u8 pattern[] = {0x25, 0x20, 0x00, 0x0E};
+    u32 ret;
+
+    u8 *temp = memsearch(pos, pattern, size, sizeof(pattern));
+
+    if(temp == NULL)
+    {
+        if(firmVersion == 0xFFFFFFFF) ret = patchOldTwlFlashcartChecks(pos, size);
+        else ret = 1;
+    }
+    else
+    {
+        u16 *off = (u16 *)(temp + 3);
+
+        off[0] = off[6] = off[0xC] = 0x2001; //mov r0, #1
+        off[1] = off[7] = off[0xD] = 0; //nop
+
+        ret = 0;
+    }
+
+    return ret;
+}
+
+u32 patchOldTwlFlashcartChecks(u8 *pos, u32 size)
+{
+    const u8 pattern[] = {0x06, 0xF0, 0xA0, 0xFD};
+    u32 ret;
+
+    u16 *off = (u16 *)memsearch(pos, pattern, size, sizeof(pattern));
+
+    if(off == NULL) ret = 1;
+    else
+    {
+        off[0] = off[6] = 0x2001; //mov r0, #1
+        off[1] = off[7] = 0; //nop
+
+        ret = 0;
+    }
+
+    return ret;
+}
+
+u32 patchTwlShaHashChecks(u8 *pos, u32 size)
+{
+    const u8 pattern[] = {0x10, 0xB5, 0x14, 0x22};
+    u32 ret;
+
+    u16 *off = (u16 *)memsearch(pos, pattern, size, sizeof(pattern));
+
+    if(off == NULL) ret = 1;
+    else
+    {
+        off[0] = 0x2001; //mov r0, #1
+        off[1] = 0x4770;
+
+        ret = 0;
+    }
+
+    return ret;
+}
+
+u32 patchAgbBootSplash(u8 *pos, u32 size)
+{
+    const u8 pattern[] = {0x00, 0x00, 0x01, 0xEF};
+    u32 ret;
+
+    u8 *off = memsearch(pos, pattern, size, sizeof(pattern));
+
+    if(off == NULL) ret = 1;
+    else
+    {
+        off[2] = 0x26;
+
+        ret = 0;
+    }
+
+    return ret;
 }

source/patches.h

@@ -21,55 +21,43 @@
 */
 
 /*
+*   Signature patches by an unknown author
+*   firmlaunches patching code originally by delebile
+*   FIRM partition writes patches by delebile
 *   ARM11 modules patching code originally by Subv
+*   Idea for svcBreak patches from yellows8 and others on #3dsdev
 */
 
 #pragma once
 
 #include "types.h"
 
-typedef struct patchData {
-    u32 offset[2];
-    union {
-        u8 type0[8];
-        u16 type1;
-    } patch;
-    u32 type;
-} patchData;
+extern CfgData configData;
 
-typedef struct __attribute__((packed))
-{
-    char magic[4];
-        
-    u8 versionMajor;
-    u8 versionMinor;
-    u8 versionBuild;
-    u8 flags;
-
-    u32 commitHash;
-
-    u32 config;
-} CFWInfo;
-
-extern bool isDevUnit;
-
-u8 *getProcess9(u8 *pos, u32 size, u32 *process9Size, u32 *process9MemAddr);
+u8 *getProcess9Info(u8 *pos, u32 size, u32 *process9Size, u32 *process9MemAddr);
 u32 *getKernel11Info(u8 *pos, u32 size, u32 *baseK11VA, u8 **freeK11Space, u32 **arm11SvcHandler, u32 **arm11ExceptionsPage);
-void patchSignatureChecks(u8 *pos, u32 size);
-void patchTitleInstallMinVersionCheck(u8 *pos, u32 size);
-void patchFirmlaunches(u8 *pos, u32 size, u32 process9MemAddr);
-void patchFirmWrites(u8 *pos, u32 size);
-void patchOldFirmWrites(u8 *pos, u32 size);
-void reimplementSvcBackdoor(u8 *pos, u32 *arm11SvcTable, u32 baseK11VA, u8 **freeK11Space);
-void implementSvcGetCFWInfo(u8 *pos, u32 *arm11SvcTable, u32 baseK11VA, u8 **freeK11Space);
-void applyLegacyFirmPatches(u8 *pos, FirmwareType firmType);
-void patchArm9ExceptionHandlersInstall(u8 *pos, u32 size);
+u32 patchSignatureChecks(u8 *pos, u32 size);
+u32 patchTitleInstallMinVersionChecks(u8 *pos, u32 size, u32 firmVersion);
+u32 patchFirmlaunches(u8 *pos, u32 size, u32 process9MemAddr);
+u32 patchFirmWrites(u8 *pos, u32 size);
+u32 patchOldFirmWrites(u8 *pos, u32 size);
+u32 reimplementSvcBackdoor(u8 *pos, u32 *arm11SvcTable, u32 baseK11VA, u8 **freeK11Space);
+u32 implementSvcGetCFWInfo(u8 *pos, u32 *arm11SvcTable, u32 baseK11VA, u8 **freeK11Space, bool isSafeMode);
+u32 patchArm9ExceptionHandlersInstall(u8 *pos, u32 size);
 u32 getInfoForArm11ExceptionHandlers(u8 *pos, u32 size, u32 *codeSetOffset);
-void patchSvcBreak9(u8 *pos, u32 size, u32 kernel9Address);
+u32 patchSvcBreak9(u8 *pos, u32 size, u32 kernel9Address);
 void patchSvcBreak11(u8 *pos, u32 *arm11SvcTable);
-void patchKernel9Panic(u8 *pos, u32 size);
-void patchKernel11Panic(u8 *pos, u32 size);
-void patchP9AccessChecks(u8 *pos, u32 size);
-void patchArm11SvcAccessChecks(u32 *arm11SvcHandler);
-void patchK11ModuleChecks(u8 *pos, u32 size, u8 **freeK11Space);
-void patchUnitInfoValueSet(u8 *pos, u32 size);
+u32 patchKernel9Panic(u8 *pos, u32 size);
+u32 patchKernel11Panic(u8 *pos, u32 size);
+u32 patchP9AccessChecks(u8 *pos, u32 size);
+u32 patchArm11SvcAccessChecks(u32 *arm11SvcHandler, u32 *endPos);
+u32 patchK11ModuleChecks(u8 *pos, u32 size, u8 **freeK11Space);
+u32 patchUnitInfoValueSet(u8 *pos, u32 size);
+u32 patchLgySignatureChecks(u8 *pos, u32 size);
+u32 patchTwlInvalidSignatureChecks(u8 *pos, u32 size);
+u32 patchTwlNintendoLogoChecks(u8 *pos, u32 size);
+u32 patchTwlWhitelistChecks(u8 *pos, u32 size);
+u32 patchTwlFlashcartChecks(u8 *pos, u32 size, u32 firmVersion);
+u32 patchOldTwlFlashcartChecks(u8 *pos, u32 size);
+u32 patchTwlShaHashChecks(u8 *pos, u32 size);
+u32 patchAgbBootSplash(u8 *pos, u32 size);

source/pin.c

@@ -50,7 +50,7 @@ void newPin(bool allowSkipping, u32 pinMode)
 
     u8 length = 4 + 2 * (pinMode - 1);
 
-    char *title = allowSkipping ? "Press START to skip or enter a new PIN" : "Enter a new PIN to proceed";
+    const char *title = allowSkipping ? "Press START to skip or enter a new PIN" : "Enter a new PIN to proceed";
     drawString(title, true, 10, 10, COLOR_TITLE);
     drawString("PIN (  digits): ", true, 10, 10 + 2 * SPACING_Y, COLOR_WHITE);
     drawCharacter('0' + length, true, 10 + 5 * SPACING_X, 10 + 2 * SPACING_Y, COLOR_WHITE);
@@ -100,7 +100,7 @@ void newPin(bool allowSkipping, u32 pinMode)
     computePinHash(tmp, enteredPassword);
     memcpy(pin.hash, tmp, sizeof(tmp));
 
-    if(!fileWrite(&pin, PIN_PATH, sizeof(PinData)))
+    if(!fileWrite(&pin, PIN_FILE, sizeof(PinData)))
         error("Error writing the PIN file");
 }
 
@@ -108,7 +108,7 @@ bool verifyPin(u32 pinMode)
 {
     PinData pin;
 
-    if(fileRead(&pin, PIN_PATH, sizeof(PinData)) != sizeof(PinData) ||
+    if(fileRead(&pin, PIN_FILE, sizeof(PinData)) != sizeof(PinData) ||
        memcmp(pin.magic, "PINF", 4) != 0 ||
        pin.formatVersionMajor != PIN_VERSIONMAJOR ||
        pin.formatVersionMinor != PIN_VERSIONMINOR)
@@ -132,16 +132,19 @@ bool verifyPin(u32 pinMode)
     u8 cnt = 0;
     u32 charDrawPos = 16 * SPACING_X;
 
-    const char messagePath[] = "/luma/pinmessage.txt";
+    const char *messageFile = "pinmessage.txt";
 
-    u32 messageSize = getFileSize(messagePath);
+    u32 messageSize = getFileSize(messageFile);
 
     if(messageSize > 0 && messageSize <= 800)
     {
         char message[messageSize + 1];
-        fileRead(message, messagePath, 0);
-        message[messageSize] = 0;
-        drawString(message, false, 10, 10, COLOR_WHITE);
+
+        if(fileRead(message, messageFile, messageSize) == messageSize)
+        {
+            message[messageSize] = 0;
+            drawString(message, false, 10, 10, COLOR_WHITE);
+        }
     }
 
     while(!unlock)

source/pin.h

@@ -28,18 +28,9 @@
 
 #include "types.h"
 
-#define PIN_PATH         "/luma/pin.bin"
+#define PIN_FILE         "pin.bin"
 #define PIN_VERSIONMAJOR 1
 #define PIN_VERSIONMINOR 3
 
-typedef struct __attribute__((packed))
-{
-    char magic[4];
-    u16 formatVersionMajor, formatVersionMinor;
-
-    u8 lengthHash[32];
-    u8 hash[32];
-} PinData;
-
 void newPin(bool allowSkipping, u32 pinMode);
 bool verifyPin(u32 pinMode);

source/screen.c

@@ -41,14 +41,11 @@
 #include "cache.h"
 #include "i2c.h"
 
-vu32 *const arm11Entry = (vu32 *)BRAHMA_ARM11_ENTRY;
+vu32 *arm11Entry = (vu32 *)BRAHMA_ARM11_ENTRY;
 static const u32 brightness[4] = {0x5F, 0x4C, 0x39, 0x26};
 
 void  __attribute__((naked)) arm11Stub(void)
 {
-    //Disable interrupts
-    __asm(".word 0xF10C01C0");
-
     //Wait for the entry to be set
     while(*arm11Entry == ARM11_STUB_ADDRESS);
 
@@ -62,7 +59,6 @@ static void invokeArm11Function(void (*func)())
     if(!hasCopiedStub)
     {
         memcpy((void *)ARM11_STUB_ADDRESS, arm11Stub, 0x30);
-        flushDCacheRange((void *)ARM11_STUB_ADDRESS, 0x30);
         hasCopiedStub = true;
     }
 
@@ -86,7 +82,7 @@ void deinitScreens(void)
         WAIT_FOR_ARM9();
     }
 
-    if(PDN_GPU_CNT != 1) invokeArm11Function(ARM11);
+    if(ARESCREENSINITED) invokeArm11Function(ARM11);
 }
 
 void updateBrightness(u32 brightnessIndex)
@@ -167,16 +163,6 @@ void clearScreens(bool clearTop, bool clearBottom, bool clearAlternate)
 
         while(!((!clearTopTmp || (REGs_PSC0[3] & 2)) && (!clearBottomTmp || (REGs_PSC1[3] & 2))));
 
-        if(fbTmp->top_right != fbTmp->top_left && clearTopTmp)
-        {
-            REGs_PSC0[0] = (u32)fbTmp->top_right >> 3; //Start address
-            REGs_PSC0[1] = (u32)(fbTmp->top_right + SCREEN_TOP_FBSIZE) >> 3; //End address
-            REGs_PSC0[2] = 0; //Fill value
-            REGs_PSC0[3] = (2 << 8) | 1; //32-bit pattern; start
-
-            while(!(REGs_PSC0[3] & 2));
-        }
-
         WAIT_FOR_ARM9();
     }
 
@@ -195,7 +181,7 @@ void initScreens(void)
         __asm(".word 0xF10C01C0");
 
         u32 brightnessLevel = brightness[MULTICONFIG(BRIGHTNESS)];
-        
+
         *(vu32 *)0x10141200 = 0x1007F;
         *(vu32 *)0x10202014 = 0x00000001;
         *(vu32 *)0x1020200C &= 0xFFFEFFFE;
@@ -302,7 +288,7 @@ void initScreens(void)
 
     if(needToSetup)
     {
-        if(PDN_GPU_CNT == 1)
+        if(!ARESCREENSINITED)
         {
             flushDCacheRange(&configData, sizeof(CfgData));
             invokeArm11Function(initSequence);

source/screen.h

@@ -31,7 +31,9 @@
 
 #define PDN_GPU_CNT (*(vu8  *)0x10141200)
 
-#define ARM11_STUB_ADDRESS (0x25000000 - 0x30) //It's currently only 0x28 bytes large. We're putting 0x30 just to be sure here
+#define ARESCREENSINITED (PDN_GPU_CNT != 1)
+
+#define ARM11_STUB_ADDRESS 0x1FFFFFC8
 #define WAIT_FOR_ARM9()    *arm11Entry = 0; while(!*arm11Entry); ((void (*)())*arm11Entry)();
 
 #define SCREEN_TOP_WIDTH     400
@@ -44,7 +46,9 @@ static volatile struct fb {
      u8 *top_left;
      u8 *top_right;
      u8 *bottom;
-} *const fbs = (volatile struct fb *)0x23FFFE00;
+}  __attribute__((packed)) *const fbs = (volatile struct fb *)0x23FFFE00;
+
+extern CfgData configData;
 
 void deinitScreens(void);
 void swapFramebuffers(bool isAlternate);

source/start.s

@@ -28,17 +28,17 @@ _start:
 
 .global launchedFirmTidLow
 launchedFirmTidLow:
-    .hword 0, 0, 0, 0, 0, 0, 0, 0 
+    .hword 0, 0, 0, 0, 0, 0, 0, 0
 
 start:
-    @ Change the stack pointer
-    mov sp, #0x27000000
-
     @ Disable interrupts
     mrs r0, cpsr
     orr r0, #0x1C0
     msr cpsr_cx, r0
 
+    @ Change the stack pointer
+    mov sp, #0x27000000
+
     @ Disable caches / MPU
     mrc p15, 0, r0, c1, c0, 0  @ read control register
     bic r0, #(1<<12)           @ - instruction cache disable

source/strings.c

@@ -27,7 +27,7 @@ u32 strlen(const char *string)
 {
     char *stringEnd = (char *)string;
 
-    while(*stringEnd) stringEnd++;
+    while(*stringEnd != 0) stringEnd++;
 
     return stringEnd - string;
 }
@@ -40,16 +40,47 @@ void concatenateStrings(char *destination, const char *source)
     memcpy(&destination[j], source, i + 1);
 }
 
-void hexItoa(u32 number, char *out, u32 digits)
+void hexItoa(u32 number, char *out, u32 digits, bool fillString)
 {
     const char hexDigits[] = "0123456789ABCDEF";
-    u32 i = 0;
+    u32 i;
 
-    while(number > 0)
+    for(i = 0; number > 0; i++)
     {
-        out[digits - 1 - i++] = hexDigits[number & 0xF];
+        out[digits - 1 - i] = hexDigits[number & 0xF];
         number >>= 4;
     }
 
-    while(i < digits) out[digits - 1 - i++] = '0';
+    if(fillString) while(i < digits) out[digits - 1 - i++] = '0';
+}
+
+void decItoa(u32 number, char *out, u32 digits)
+{
+    for(u32 i = 0; number > 0; i++)
+    {
+        out[digits - 1 - i] = '0' + number % 10;
+        number /= 10;
+    }
+}
+
+u32 hexAtoi(const char *in, u32 digits)
+{
+    u32 res = 0;
+    char *tmp = (char *)in;
+
+    for(u32 i = 0; i < digits && *tmp != 0; tmp++, i++)
+        res = (*tmp > '9' ? *tmp - 'A' + 10 : *tmp - '0') + (res << 4);
+
+    return res;
+}
+
+u32 decAtoi(const char *in, u32 digits)
+{
+    u32 res = 0;
+    char *tmp = (char *)in;
+
+    for(u32 i = 0; i < digits && *tmp != 0; tmp++, i++)
+        res = *tmp - '0' + res * 10;
+
+    return res;
 }

source/strings.h

@@ -26,4 +26,7 @@
 
 u32 strlen(const char *string);
 void concatenateStrings(char *destination, const char *source);
-void hexItoa(u32 number, char *out, u32 digits);
+void hexItoa(u32 number, char *out, u32 digits, bool fillString);
+void decItoa(u32 number, char *out, u32 digits);
+u32 hexAtoi(const char *in, u32 digits);
+u32 decAtoi(const char *in, u32 digits);

source/types.h

@@ -36,9 +36,52 @@ typedef volatile u16 vu16;
 typedef volatile u32 vu32;
 typedef volatile u64 vu64;
 
-//Used by multiple files
+#include "3dsheaders.h"
+
 #define BRAHMA_ARM11_ENTRY 0x1FFFFFF8
 
+#define CFG_BOOTENV    (*(vu32 *)0x10010000)
+#define CFG_UNITINFO   (*(vu8  *)0x10010010)
+#define PDN_MPCORE_CFG (*(vu32 *)0x10140FFC)
+#define PDN_SPI_CNT    (*(vu32 *)0x101401C0)
+
+#define ISN3DS       (PDN_MPCORE_CFG == 7)
+#define ISDEVUNIT    (CFG_UNITINFO != 0)
+#define ISA9LH       (!PDN_SPI_CNT)
+#define ISFIRMLAUNCH (launchedFirmTidLow[5] != 0)
+
+typedef struct __attribute__((packed))
+{
+    char magic[4];
+    u16 formatVersionMajor, formatVersionMinor;
+
+    u32 config;
+} CfgData;
+
+typedef struct __attribute__((packed))
+{
+    char magic[4];
+    u16 formatVersionMajor, formatVersionMinor;
+
+    u8 lengthHash[32];
+    u8 hash[32];
+} PinData;
+
+typedef struct __attribute__((packed))
+{
+    u32 magic[2];
+    u16 versionMinor, versionMajor;
+
+    u16 processor, core;
+    u32 type;
+
+    u32 totalSize;
+    u32 registerDumpSize;
+    u32 codeDumpSize;
+    u32 stackDumpSize;
+    u32 additionalDataSize;
+} ExceptionDumpHeader;
+
 typedef enum FirmwareSource
 {
     FIRMWARE_SYSNAND = 0,
@@ -55,4 +98,6 @@ typedef enum FirmwareType
     AGB_FIRM,
     SAFE_FIRM,
     NATIVE_FIRM1X2X
-} FirmwareType;
+} FirmwareType;
+
+extern u16 launchedFirmTidLow[8]; //Defined in start.s

source/utils.c

@@ -54,24 +54,13 @@ u32 waitInput(void)
     return key;
 }
 
-void mcuReboot(void)
-{
-    if(!isFirmlaunch && PDN_GPU_CNT != 1) clearScreens(true, true, false);
-
-    //Ensure that all memory transfers have completed and that the data cache has been flushed
-    flushEntireDCache();
-
-    i2cWriteRegister(I2C_DEV_MCU, 0x20, 1 << 1);
-    while(true);
-}
-
 void mcuPowerOff(void)
 {
-    if(!isFirmlaunch && PDN_GPU_CNT != 1) clearScreens(true, true, false);
+    if(!ISFIRMLAUNCH && ARESCREENSINITED) clearScreens(true, true, false);
 
     //Ensure that all memory transfers have completed and that the data cache has been flushed
     flushEntireDCache();
-    
+
     i2cWriteRegister(I2C_DEV_MCU, 0x20, 1 << 0);
     while(true);
 }
@@ -112,14 +101,16 @@ void chrono(u32 seconds)
 
 void error(const char *message)
 {
-    if(isFirmlaunch) mcuReboot();
+    if(!ISFIRMLAUNCH)
+    {
+        initScreens();
 
-    initScreens();
+        drawString("An error has occurred:", true, 10, 10, COLOR_RED);
+        u32 posY = drawString(message, true, 10, 30, COLOR_WHITE);
+        drawString("Press any button to shutdown", true, 10, posY + 2 * SPACING_Y, COLOR_WHITE);
 
-    drawString("An error has occurred:", true, 10, 10, COLOR_RED);
-    u32 posY = drawString(message, true, 10, 30, COLOR_WHITE);
-    drawString("Press any button to shutdown", true, 10, posY + 2 * SPACING_Y, COLOR_WHITE);
+        waitInput();
+    }
 
-    waitInput();
     mcuPowerOff();
 }

source/utils.h

@@ -28,10 +28,7 @@
 #define REG_TIMER_CNT(i)    *(vu16 *)(0x10003002 + 4 * i)
 #define REG_TIMER_VAL(i)    *(vu16 *)(0x10003000 + 4 * i)
 
-extern bool isFirmlaunch;
-
 u32 waitInput(void);
-void mcuReboot(void);
 void mcuPowerOff(void);
 void chrono(u32 seconds);
 void error(const char *message);