Remove A9LH & Brahma support altogether, use FIRM format instead

Makefile

@@ -36,13 +36,13 @@ define bin2o
 endef
 
 .PHONY: all
-all: a9lh
+all: firm
 
 .PHONY: release
 release: $(dir_out)/$(name)$(revision).7z
 
-.PHONY: a9lh
+.PHONY: firm
-a9lh: $(dir_out)/arm9loaderhax.bin
+firm: $(dir_out)/boot.firm
 
 .PHONY: clean
 clean:
@@ -63,12 +63,9 @@ $(dir_out)/$(name)$(revision).7z: all
 	@mkdir -p "$(@D)"
 	@7z a -mx $@ ./$(@D)/* ./$(dir_exceptions)/exception_dump_parser.py
 
-$(dir_out)/arm9loaderhax.bin: $(dir_build)/main.bin
+$(dir_out)/boot.firm: $(dir_build)/main.elf
 	@mkdir -p "$(@D)"
-	@cp -a $(dir_build)/main.bin $@
+	@firmtool build $@ -e 0 -D $^ -C NDMA
-
-$(dir_build)/main.bin: $(dir_build)/main.elf
-	$(OBJCOPY) -S -O binary $< $@
 
 $(dir_build)/main.elf: $(bundled) $(objects)
 	$(LINK.o) -T linker.ld $(OUTPUT_OPTION) $^

injector/source/patcher.h

@@ -28,7 +28,6 @@ enum singleOptions
     AUTOBOOTEMU = 0,
     USEEMUFIRM,
     LOADEXTFIRMSANDMODULES,
-    USECUSTOMPATH,
     PATCHGAMES,
     PATCHVERSTRING,
     SHOWGBABOOT,

loader/source/main.c

@@ -22,15 +22,20 @@
 
 #include "memory.h"
 #include "cache.h"
+#include "firm.h"
 
-void main(u32 payloadSize)
+void main(int argc __attribute__((unused)), char **argv)
 {
-    void *payloadAddress = (void *)0x23F00000;
+    Firm *firm = (Firm *)0x24000000;
+    char absPath[92];
 
-    memcpy(payloadAddress, (void *)0x24000000, payloadSize);
+    u32 i;
+    for(i = 0; i < 91 && argv[1] != 0; i++)
+        absPath[i] = argv[1][i];
+    for(; i < 91; i++)
+        absPath[i] = 0;
 
-    //Ensure that all memory transfers have completed and that the caches have been flushed
+    char *argvPassed[1] = {absPath};
-    flushCaches();
 
-    ((void (*)())payloadAddress)();
+    launchFirm(firm, 1, argvPassed);
 }

loader/source/start.s

@@ -1,5 +1,5 @@
 @   This file is part of Luma3DS
-@   Copyright (C) 2016 Aurora Wright, TuxSH
+@   Copyright (C) 2017 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

patches/reboot.s

@@ -2,9 +2,15 @@
 
 .arm.little
 
-payload_addr equ 0x23F00000   ; Brahma payload address
+argv_addr equ 0x27FFDF00
-payload_maxsize equ 0x100000  ; Maximum size for the payload (maximum that CakeBrah supports)
+fname_addr equ 0x27FFDF80
+low_tid_addr equ 0x27FFDFE0
+copy_launch_stub_addr equ 0x27FFE000
 
+firm_addr equ 0x24000000
+firm_maxsize equ (copy_launch_stub_addr - 0x1000 - firm_addr)
+
+arm11_entrypoint_addr equ 0x1FFFFFFC
 .create "build/reboot.bin", 0
 .arm
     ; Interesting registers and locations to keep in mind, set just before this code is ran:
@@ -28,9 +34,6 @@ payload_maxsize equ 0x100000  ; Maximum size for the payload (maximum that CakeB
         cmp r0, r2
         bne pxi_wait_recv
 
-    mov r4, #2
-
-    open_payload:
     ; Open file
     add r0, r7, #8
     adr r1, fname
@@ -39,31 +42,33 @@ payload_maxsize equ 0x100000  ; Maximum size for the payload (maximum that CakeB
     orr r6, 1
     blx r6
     cmp r0, #0
-        beq read_payload
+    bne panic
-        subs r4, r4, #1
-        beq panic
-        adr r0, fname
-        adr r1, nand_mount
-        mov r2, #8
-        bl memcpy16
-        b open_payload
 
-    read_payload:
     ; Read file
     mov r0, r7
     adr r1, bytes_read
-        ldr r2, =payload_addr
+    ldr r2, =firm_addr
-        ldr r3, =payload_maxsize
+    ldr r3, =firm_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
-    ldr r0, =payload_addr + 4
+    ldr r0, =low_tid_addr
     add r1, r8, #0x1A
     mov r2, #0x10
     bl memcpy16
 
+    ldr r0, =fname_addr
+    adr r1, fname
+    mov r2, #42
+    bl memcpy16
+
+    ldr r0, =argv_addr
+    ldr r1, =fname_addr
+    ldr r2, =low_tid_addr
+    stmia r0, {r1, r2}
+
     ; Set kernel state
     mov r0, #0
     mov r1, #0
@@ -81,12 +86,14 @@ payload_maxsize equ 0x100000  ; Maximum size for the payload (maximum that CakeB
         b die
 
     memcpy16:
+        cmp r2, #0
+        bxeq lr
         add r2, r0, r2
-        copy_loop:
+        copy_loop16:
             ldrh r3, [r1], #2
             strh r3, [r0], #2
             cmp r0, r2
-            blo copy_loop
+            blo copy_loop16
         bx lr
 
     panic:
@@ -98,7 +105,7 @@ payload_maxsize equ 0x100000  ; Maximum size for the payload (maximum that CakeB
 bytes_read: .word 0
 fopen: .ascii "OPEN"
 .pool
-fname: .dcw "sdmc:/arm9loaderhax.bin"
+fname: .dcw "sdmc:/arm9loaderha.firm"
        .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"
@@ -106,12 +113,75 @@ nand_mount: .dcw "nand"
 .align 4
     kernelcode_start:
 
-    ldr sp, =0x080FF000
+    mrs r0, cpsr  ; disable interrupts
+    orr r0, #0xC0
+    msr cpsr, r0
+
+    ldr sp, =0x27FFDF00
+
+    ldr r0, =copy_launch_stub_addr
+    adr r1, copy_launch_stub
+    mov r2, #(copy_launch_stub_end - copy_launch_stub)
+    bl memcpy32
 
     ; Disable MPU
     ldr r0, =0x42078 ; alt vector select, enable itcm
     mcr p15, 0, r0, c1, c0, 0
 
+    bl flushCaches
+
+    ldr r0, =copy_launch_stub_addr
+    bx r0
+
+    copy_launch_stub:
+
+    ldr r4, =firm_addr
+
+    mov r5, #0
+    load_section_loop:
+        ; Such checks. Very ghetto. Wow.
+        add r3, r4, #0x40
+        add r3, r5,lsl #5
+        add r3, r5,lsl #4
+        ldmia r3, {r6-r8}
+        mov r0, r7
+        add r1, r4, r6
+        mov r2, r8
+        bl memcpy32
+        add r5, #1
+        cmp r5, #3
+        blo load_section_loop
+
+    ldr r0, =arm11_entrypoint_addr
+    ldr r1, [r4, #0x08]
+    str r1, [r0]
+
+    mov r0, #2 ; argc
+    ldr r1, =argv_addr ; argv
+    ldr r2, =0xBEEF    ; magic word
+
+    ldr r5, =arm11_entrypoint_addr
+    ldr r6, [r4, #0x08]
+    str r6, [r5]
+
+    ldr lr, [r4, #0x0c]
+    bx lr
+
+    memcpy32:
+    cmp r2, #0
+    bxeq lr
+    add r2, r0, r2
+    copy_loop32:
+        ldr r3, [r1], #4
+        str r3, [r0], #4
+        cmp r0, r2
+        blo copy_loop32
+    bx lr
+
+    copy_launch_stub_end:
+
+    flushCaches:
+
     ; Clean and flush data cache
     mov r1, #0 ; segment counter
     outer_loop:
@@ -134,10 +204,7 @@ nand_mount: .dcw "nand"
     ; Flush instruction cache
     mcr p15, 0, r1, c7, c5, 0
 
-    ; Jump to payload
+    bx lr
-    ldr r0, =payload_addr
-    bx r0
 
 .pool
 .close
-

source/3dsheaders.h

@@ -24,6 +24,8 @@
 *   Adapted from 3DBrew and https://github.com/mid-kid/CakesForeveryWan/blob/master/source/headers.h
 */
 
+#pragma once
+
 typedef struct __attribute__((packed))
 {
     u32 address;
@@ -139,7 +141,7 @@ typedef struct __attribute__((packed))
 
 typedef struct __attribute__((packed))
 {
-    u32 magic;
+    char magic[4];
     u32 reserved1;
     u8 *arm11Entry;
     u8 *arm9Entry;

source/config.c

@@ -84,7 +84,6 @@ void configMenu(bool isSdMode, bool oldPinStatus, u32 oldPinMode)
     const char *singleOptionsText[] = { "( ) Autoboot EmuNAND",
                                         "( ) Use EmuNAND FIRM if booting with R",
                                         "( ) Enable loading external FIRMs and modules",
-                                        "( ) Use custom path",
                                         "( ) Enable game patching",
                                         "( ) Show NAND or user string in System Settings",
                                         "( ) Show GBA boot screen in patched AGB_FIRM",
@@ -147,10 +146,6 @@ void configMenu(bool isSdMode, bool oldPinStatus, u32 oldPinMode)
                                           "This isn't needed in most cases.\n\n"
                                           "Refer to the wiki for instructions.",
 
-                                          "Use a custom path for the\n"
-                                          "Luma3DS payload.\n\n"
-                                          "Refer to the wiki for instructions.",
-
                                           "Enable overriding the region and\n"
                                           "language configuration and the usage\n"
                                           "of patched code binaries,\n"
@@ -195,8 +190,8 @@ void configMenu(bool isSdMode, bool oldPinStatus, u32 oldPinMode)
 
                                           "Enable Luma3DS's ARM9/ARM11 exception\n"
                                           "handlers.\n"
-                                          "A9LH is required, and Luma3DS should\n"
+                                          "Luma3DS should be ran as:\n"
-                                          "be ran as arm9loaderhax.bin.\n"
+                                          "arm9loaderhax.bin\n\n"
                                           "Useful for debugging."
                                        };
 
@@ -226,7 +221,6 @@ void configMenu(bool isSdMode, bool oldPinStatus, u32 oldPinMode)
         { .visible = true },
         { .visible = true },
         { .visible = true },
-        { .visible = true },
         { .visible = true }
     };
 

source/config.h

@@ -30,7 +30,7 @@
 
 #define CONFIG_FILE         "config.bin"
 #define CONFIG_VERSIONMAJOR 1
-#define CONFIG_VERSIONMINOR 10
+#define CONFIG_VERSIONMINOR 11
 
 #define BOOTCFG_NAND         BOOTCONFIG(0, 7)
 #define BOOTCFG_FIRM         BOOTCONFIG(3, 7)
@@ -50,7 +50,6 @@ enum singleOptions
     AUTOBOOTEMU = 0,
     USEEMUFIRM,
     LOADEXTFIRMSANDMODULES,
-    USECUSTOMPATH,
     PATCHGAMES,
     PATCHVERSTRING,
     SHOWGBABOOT,

source/crypto.c

@@ -230,7 +230,7 @@ static void aes_batch(void *dst, const void *src, u32 blockCount)
     }
 }
 
-static void aes(void *dst, const void *src, u32 blockCount, void *iv, u32 mode, u32 ivMode)
+void aes(void *dst, const void *src, u32 blockCount, void *iv, u32 mode, u32 ivMode)
 {
     *REG_AESCNT =   mode |
                     AES_CNT_INPUT_ORDER | AES_CNT_OUTPUT_ORDER |
@@ -278,10 +278,8 @@ static void sha_wait_idle()
     while(*REG_SHA_CNT & 1);
 }
 
-static void sha(void *res, const void *src, u32 size, u32 mode)
+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;
 
@@ -571,21 +569,3 @@ void computePinHash(u8 *outbuf, const u8 *inbuf)
     aes(cipherText, inbuf, 1, cid, AES_CBC_ENCRYPT_MODE, AES_INPUT_BE | AES_INPUT_NORMAL);
     sha(outbuf, cipherText, sizeof(cipherText), SHA_256_MODE);
 }
-
-void backupAndRestoreShaHash(bool isRestore)
-{
-    if(ISSIGHAX) return;
-
-    static bool didShaHashBackup = false;
-    __attribute__((aligned(4))) static u8 shaHashBackup[SHA_256_HASH_SIZE];
-
-    if(isRestore)
-    {
-        if(didShaHashBackup) memcpy((void *)REG_SHA_HASH, shaHashBackup, sizeof(shaHashBackup));
-    }
-    else if(!didShaHashBackup)
-    {
-        memcpy(shaHashBackup, (void *)REG_SHA_HASH, sizeof(shaHashBackup));
-        didShaHashBackup = true;
-    }
-}

source/crypto.h

@@ -107,6 +107,9 @@
 extern u32 emuOffset;
 extern FirmwareSource firmSource;
 
+void aes(void *dst, const void *src, u32 blockCount, void *iv, u32 mode, u32 ivMode);
+void sha(void *res, const void *src, u32 size, u32 mode);
+
 void ctrNandInit(void);
 int ctrNandRead(u32 sector, u32 sectorCount, u8 *outbuf);
 int ctrNandWrite(u32 sector, u32 sectorCount, const u8 *inbuf);
@@ -114,4 +117,3 @@ 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 backupAndRestoreShaHash(bool isRestore);

source/firm.c

@@ -35,8 +35,6 @@
 #include "fmt.h"
 #include "../build/bundled.h"
 
-static Firm *firm = (Firm *)0x24000000;
-
 static inline bool loadFirmFromStorage(FirmwareType firmType)
 {
     const char *firmwareFiles[] = {

source/firm.h

@@ -23,6 +23,9 @@
 #pragma once
 
 #include "types.h"
+#include "3dsheaders.h"
+
+static Firm *const firm = (Firm *const)0x24000000;
 
 u32 loadFirm(FirmwareType *firmType, FirmwareSource nandType, bool loadFromStorage, bool isSafeMode);
 u32 patchNativeFirm(u32 firmVersion, FirmwareSource nandType, u32 emuHeader, bool isSafeMode, bool doUnitinfoPatch, bool enableExceptionHandlers);

source/fs.c

@@ -32,6 +32,8 @@
 #include "config.h"
 #include "fatfs/ff.h"
 #include "buttons.h"
+#include "firm.h"
+#include "crypto.h"
 #include "../build/bundled.h"
 
 static FATFS sdFs,
@@ -116,12 +118,80 @@ void fileDelete(const char *path)
     f_unlink(path);
 }
 
+static __attribute__((noinline)) bool overlaps(u32 as, u32 ae, u32 bs, u32 be)
+{
+    if (as <= bs && bs <= ae)
+        return true;
+    else if (bs <= as && as <= be)
+        return true;
+    return false;
+}
+
+static bool checkFirmPayload(void)
+{
+    if(memcmp(firm->magic, "FIRM", 4) != 0)
+        return false;
+
+    if(firm->arm9Entry == NULL)  //allow for the arm11 entrypoint to be zero in which case nothing is done on the arm11 side
+        return false;
+
+    u32 size = 0x200;
+    for(u32 i = 0; i < 4; i++)
+        size += firm->section[i].size;
+
+    bool arm9EpFound = false, arm11EpFound = false;
+    for(u32 i = 0; i < 4; i++)
+    {
+        __attribute__((aligned(4))) u8 hash[0x20];
+
+        FirmSection *section = &firm->section[i];
+
+        // allow empty sections
+        if (section->size == 0)
+            continue;
+
+        if(section->offset < 0x200)
+            return false;
+
+        if(section->address + section->size < section->address) //overflow check
+            return false;
+
+        if(((u32)section->address & 3) || (section->offset & 0x1FF) || (section->size & 0x1FF)) //alignment check
+            return false;
+
+        if(overlaps((u32)section->address, (u32)section->address + section->size, 0x27FFE000, 0x28000000))
+            return false;
+        else if(overlaps((u32)section->address, (u32)section->address + section->size, 0x27FFE000 - 0x1000, 0x27FFE000))
+            return false;
+        else if(overlaps((u32)section->address, (u32)section->address + section->size, (u32)firm, (u32)firm + size))
+            return false;
+
+        sha(hash, (u8 *)firm + section->offset, section->size, SHA_256_MODE);
+        if(memcmp(hash, section->hash, 0x20) != 0)
+            return false;
+
+        if(firm->arm9Entry >= section->address && firm->arm9Entry < (section->address + section->size))
+            arm9EpFound = true;
+
+        if(firm->arm11Entry >= section->address && firm->arm11Entry < (section->address + section->size))
+            arm11EpFound = true;
+    }
+
+    return arm9EpFound && (firm->arm11Entry == NULL || arm11EpFound);
+}
+
 void loadPayload(u32 pressed, const char *payloadPath)
 {
     u32 *loaderAddress = (u32 *)0x27FFE000;
-    u8 *payloadAddress = (u8 *)0x24000000;
     u32 payloadSize = 0,
-        maxPayloadSize = 0xFFE00;
+        maxPayloadSize = (u32)((u8 *)loaderAddress - (u8 *)firm);
+
+    char path[62] = {0},
+         absPath[92] = {0};
+
+    char mountPoint[5] = {0};
+    for(u32 i = 0; i < 4 && launchedPath[i] != ':'; i++)
+        mountPoint[i] = launchedPath[i];
 
     if(payloadPath == NULL)
     {
@@ -142,7 +212,6 @@ void loadPayload(u32 pressed, const char *payloadPath)
         DIR dir;
         FILINFO info;
         FRESULT result;
-        char path[22];
 
         result = f_findfirst(&dir, &info, "payloads", pattern);
 
@@ -153,24 +222,36 @@ void loadPayload(u32 pressed, const char *payloadPath)
         if(!info.fname[0]) return;
 
         sprintf(path, "payloads/%s", info.altname);
-        payloadSize = fileRead(payloadAddress, path, maxPayloadSize);
+        if(memcmp(mountPoint, "nand", 4))
-    }
+            sprintf(absPath, "nand:/rw/luma/payloads/%s", info.altname);
-    else payloadSize = fileRead(payloadAddress, payloadPath, maxPayloadSize);
+        else
+            sprintf(absPath, "%s:/luma/payloads/%s", mountPoint, info.altname);
 
-    if(!payloadSize) return;
+        payloadSize = fileRead(firm, path, maxPayloadSize);
+    }
+    else
+    {
+        if(memcmp(mountPoint, "nand", 4))
+            sprintf(absPath, "nand:/rw/luma/payloads/%s", payloadPath);
+        else
+            sprintf(absPath, "%s:/luma/payloads/%s", mountPoint, payloadPath);
+
+        payloadSize = fileRead(firm, payloadPath, maxPayloadSize);
+    }
+
+    if(!payloadSize || !checkFirmPayload()) return;
 
     writeConfig(true);
 
+    char *argv[1] = {absPath};
     memcpy(loaderAddress, loader_bin, loader_bin_size);
 
-    if(ISN3DS) kernel9Loader(NULL);
-    backupAndRestoreShaHash(true);
     initScreens();
 
     flushDCacheRange(loaderAddress, loader_bin_size);
     flushICacheRange(loaderAddress, loader_bin_size);
 
-    ((void (*)(u32))loaderAddress)(payloadSize);
+    ((void (*)(int, char **, u32))loaderAddress)(1, argv, 0x0000BEEF);
 }
 
 void payloadMenu(void)
@@ -190,11 +271,11 @@ void payloadMenu(void)
 
         u32 nameLength = strlen(info.fname);
 
-        if(nameLength < 5 || nameLength > 52) continue;
+        if(nameLength < 6 || nameLength > 52) continue;
 
-        nameLength -= 4;
+        nameLength -= 5;
 
-        if(memcmp(info.fname + nameLength, ".bin", 4) != 0) continue;
+        if(memcmp(info.fname + nameLength, ".firm", 5) != 0) continue;
 
         memcpy(payloadList[payloadNum], info.fname, nameLength);
         payloadList[payloadNum][nameLength] = 0;
@@ -258,7 +339,7 @@ void payloadMenu(void)
 
     if(pressed != BUTTON_START)
     {
-        sprintf(path, "payloads/%s.bin", payloadList[selectedPayload]);
+        sprintf(path, "payloads/%s.firm", payloadList[selectedPayload]);
         loadPayload(0, path);
         error("The payload is too large or corrupted.");
     }

source/main.c

@@ -32,12 +32,16 @@
 #include "pin.h"
 #include "crypto.h"
 #include "fmt.h"
+#include "memory.h"
 
 extern CfgData configData;
 extern ConfigurationStatus needConfig;
 extern FirmwareSource firmSource;
 
-void main(void)
+u16 launchedFirmTidLow[8];
+u16 launchedPath[42];
+
+void main(int argc, char **argv)
 {
     bool isSafeMode = false,
          isNoForceFlagSet = false;
@@ -45,15 +49,59 @@ void main(void)
     FirmwareType firmType;
     FirmwareSource nandType;
 
+    switch(argc)
+    {
+        case 0:
+            error("Unsupported launcher.");
+            break;
+
+        case 1: //Normal boot
+        {
+            u32 i;
+            for(i = 0; i < 41 && launchedPath[i] != 0; i++) //Copy and convert the path to utf16
+                launchedPath[2 * i] = argv[0][i];
+            for(; i < 41; i++)
+                launchedPath[i] = 0;
+
+            for(u32 i = 0; i < 8; i++)
+                launchedFirmTidLow[i] = 0;
+            break;
+        }
+
+        case 2: //Firmlaunch
+        {
+            u32 i;
+            u16 *p = (u16 *)argv[0];
+            for(i = 0; i < 41 && launchedPath[i] != 0; i++)
+                launchedPath[i] = p[i];
+            for(; i < 41; i++)
+                launchedPath[i] = 0;
+
+            memcpy(launchedFirmTidLow, (u16 *)argv[1], 16);
+            break;
+        }
+    }
+
+    char mountPoint[5] = {0};
+    for(u32 i = 0; i < 4 && argv[0][i] != ':'; i++)
+        mountPoint[i] = argv[0][i];
+
     //Mount SD or CTRNAND
     bool isSdMode;
-    if(mountFs(true, false)) isSdMode = true;
+
-    else
+    if(memcmp(mountPoint, "sdmc", 4) == 0)
+    {
+        if(!mountFs(true, false)) error("Failed to mount SD.");
+        isSdMode = true;
+    }
+    else if(memcmp(mountPoint, "nand", 4) == 0)
     {
         firmSource = FIRMWARE_SYSNAND;
         if(!mountFs(false, true)) error("Failed to mount SD and CTRNAND.");
         isSdMode = false;
     }
+    else
+        error("Launched from an unsupported location");
 
     //Attempt to read the configuration file
     needConfig = readConfig() ? MODIFY_CONFIGURATION : CREATE_CONFIGURATION;

source/patches.c

@@ -37,30 +37,6 @@
 #include "utils.h"
 #include "../build/bundled.h"
 
-static inline void pathChanger(u8 *pos)
-{
-    const char *pathFile = "path.txt";
-    u8 path[57];
-
-    u32 pathSize = fileRead(path, pathFile, sizeof(path));
-
-    if(pathSize < 6) return;
-
-    if(path[pathSize - 1] == 0xA) pathSize--;
-    if(path[pathSize - 1] == 0xD) pathSize--;
-
-    if(pathSize < 6 || pathSize > 55 || path[0] != '/' || memcmp(path + pathSize - 4, ".bin", 4) != 0) return;
-
-    u16 finalPath[56];
-    for(u32 i = 0; i < pathSize; i++)
-        finalPath[i] = (u16)path[i];
-
-    finalPath[pathSize] = 0;
-
-    u8 *posPath = memsearch(pos, u"sd", reboot_bin_size, 4) + 0xA;
-    memcpy(posPath, finalPath, (pathSize + 1) * 2);
-}
-
 u8 *getProcess9Info(u8 *pos, u32 size, u32 *process9Size, u32 *process9MemAddr)
 {
     u8 *temp = memsearch(pos, "NCCH", size, 4);
@@ -159,7 +135,8 @@ u32 patchFirmlaunches(u8 *pos, u32 size, u32 process9MemAddr)
     u32 *pos_fopen = (u32 *)memsearch(off, "OPEN", reboot_bin_size, 4);
     *pos_fopen = fOpenOffset;
 
-    if(CONFIG(USECUSTOMPATH)) pathChanger(off);
+    //u16 *fname = (u16 *)memsearch(off, u"sd", reboot_bin_size, 4);
+    //memcpy(fname, u"sdmc:/test.firm", 32);
 
     return 0;
 }

source/start.s

@@ -24,32 +24,31 @@
 .align 4
 .global _start
 _start:
-    b start
-
-.global launchedFirmTidLow
-launchedFirmTidLow:
-    .hword 0, 0, 0, 0, 0, 0, 0, 0
-
-start:
     @ Disable interrupts
-    mrs r0, cpsr
+    mrs r4, cpsr
-    orr r0, #0x1C0
+    orr r4, #0x1C0
-    msr cpsr_cx, r0
+    msr cpsr_cx, r4
+
+    ldr r4, =0xBEEF
+    cmp r2, r4
+    movne r0, #0    @ check magic word
 
     @ Change the stack pointer
     mov sp, #0x27000000
 
     @ Disable caches / MPU
-    mrc p15, 0, r0, c1, c0, 0  @ read control register
+    mrc p15, 0, r4, c1, c0, 0  @ read control register
-    bic r0, #(1<<12)           @ - instruction cache disable
+    bic r4, #(1<<12)           @ - instruction cache disable
-    bic r0, #(1<<2)            @ - data cache disable
+    bic r4, #(1<<2)            @ - data cache disable
-    bic r0, #(1<<0)            @ - mpu disable
+    bic r4, #(1<<0)            @ - mpu disable
-    mcr p15, 0, r0, c1, c0, 0  @ write control register
+    mcr p15, 0, r4, c1, c0, 0  @ write control register
 
     @ Flush caches
     bl flushEntireDCache
     bl flushEntireICache
 
+    push {r0-r3}
+
     @ Give read/write access to all the memory regions
     ldr r0, =0x3333333
     mcr p15, 0, r0, c5, c0, 2 @ write data access
@@ -98,4 +97,5 @@ start:
     sub r2, r0
     bl memset32
 
+    pop {r0-r3}
     b main

source/types.h

@@ -115,4 +115,5 @@ typedef enum FirmwareType
     NATIVE_FIRM1X2X
 } FirmwareType;
 
-extern u16 launchedFirmTidLow[8]; //Defined in start.s
+extern u16 launchedFirmTidLow[8];
+extern u16 launchedPath[42];