LowLevel/Luma3DS-3GX
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Lots of refactoring, main() has its own file yet again, properly handle failed patches/decryption steps, support TWL and AGB FIRM since 3.0

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Aurora 2016-10-10 01:34:53 +02:00
parent aa422914bd
commit 5b4712644a
21 changed files with 1187 additions and 711 deletions
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161
source/3dsheaders.h Normal file
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@ -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;

17
source/config.c
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@ -29,6 +29,8 @@
#include "buttons.h"
#include "pin.h"
CfgData configData;
bool readConfig(void)
{
bool ret;
@ -67,7 +69,7 @@ void writeConfig(ConfigurationStatus needConfig, u32 configTemp)
}
}
void configMenu(Fs fsStatus, 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( )",
@ -116,7 +118,8 @@ void configMenu(Fs fsStatus, 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"
@ -194,11 +197,11 @@ void configMenu(Fs fsStatus, bool oldPinStatus, u32 oldPinMode)
u32 enabled;
bool visible;
} multiOptions[] = {
{ .posXs = {19, 24, 29, 34}, .visible = fsStatus == SD_CARD },
{ .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 = {17, 26, 32, 44}, .visible = ISN3DS },
{ .posXs = {19, 30, 42, 0}, .visible = true }
};
@ -207,10 +210,10 @@ void configMenu(Fs fsStatus, bool oldPinStatus, u32 oldPinMode)
bool enabled;
bool visible;
} singleOptions[] = {
{ .visible = fsStatus == SD_CARD },
{ .visible = fsStatus == SD_CARD },
{ .visible = isSdMode },
{ .visible = isSdMode },
{ .visible = true },
{ .visible = fsStatus == SD_CARD },
{ .visible = isSdMode },
{ .visible = true },
{ .visible = true },
{ .visible = true },

13
source/config.h
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@ -60,14 +60,6 @@ enum singleOptions
PATCHACCESS
};
typedef struct __attribute__((packed))
{
char magic[4];
u16 formatVersionMajor, formatVersionMinor;
u32 config;
} CfgData;
typedef enum ConfigurationStatus
{
DONT_CONFIGURE = 0,
@ -75,9 +67,6 @@ typedef enum ConfigurationStatus
CREATE_CONFIGURATION
} ConfigurationStatus;
extern CfgData configData;
extern bool isN3DS;
bool readConfig(void);
void writeConfig(ConfigurationStatus needConfig, u32 configTemp);
void configMenu(Fs fsStatus, bool oldPinStatus, u32 oldPinMode);
void configMenu(bool isSdMode, bool oldPinStatus, u32 oldPinMode);

69
source/crypto.c
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@ -24,11 +24,11 @@
* 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
* 3ds type structs adapted from 3DBrew and https://github.com/mid-kid/CakesForeveryWan/blob/master/source/headers.h
*/
#include "crypto.h"
#include "memory.h"
#include "utils.h"
#include "fatfs/sdmmc/sdmmc.h"
/****************************************************************
@ -257,6 +257,8 @@ 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;
@ -301,6 +303,8 @@ 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];
@ -310,7 +314,7 @@ 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);
@ -376,24 +380,40 @@ void set6x7xKeys(void)
memset32((void *)0x01FFCD00, 0, 0x10);
}
void decryptExeFs(Ncch *ncch)
bool decryptExeFs(Cxi *cxi)
{
u8 *exeFsOffset = (u8 *)ncch + ncch->exeFsOffset * 0x200;
u32 exeFsSize = ncch->exeFsSize * 0x200;
bool isCxi;
if(memcmp(cxi->ncch.magic, "NCCH", 4) == 0)
{
isCxi = true;
u8 *exeFsOffset = (u8 *)cxi + cxi->ncch.exeFsOffset * 0x200;
u32 exeFsSize = cxi->ncch.exeFsSize * 0x200;
u8 __attribute__((aligned(4))) ncchCtr[AES_BLOCK_SIZE] = {0};
for(u32 i = 0; i < 8; i++)
ncchCtr[7 - i] = ncch->partitionId[i];
ncchCtr[7 - i] = cxi->ncch.partitionId[i];
ncchCtr[8] = 2;
aes_setkey(0x2C, ncch, AES_KEYY, AES_INPUT_BE | AES_INPUT_NORMAL);
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(ncch, exeFsOffset + 0x200, exeFsSize / AES_BLOCK_SIZE, ncchCtr, AES_CTR_MODE, AES_INPUT_BE | AES_INPUT_NORMAL);
aes(cxi, exeFsOffset + 0x200, 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 Ticket *ticket, Ncch *ncch, u32 ncchSize)
bool decryptNusFirm(const Ticket *ticket, Cxi *cxi, u32 ncchSize)
{
bool isTicket;
if(memcmp(ticket->sigIssuer, "Root", 4) == 0)
{
isTicket = true;
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};
@ -408,9 +428,11 @@ void decryptNusFirm(const Ticket *ticket, Ncch *ncch, u32 ncchSize)
aes_setkey(0x16, titleKey, AES_KEYNORMAL, AES_INPUT_BE | AES_INPUT_NORMAL);
aes_use_keyslot(0x16);
aes(ncch, ncch, ncchSize / AES_BLOCK_SIZE, ncchIv, AES_CBC_DECRYPT_MODE, AES_INPUT_BE | AES_INPUT_NORMAL);
aes(cxi, cxi, ncchSize / AES_BLOCK_SIZE, ncchIv, AES_CBC_DECRYPT_MODE, AES_INPUT_BE | AES_INPUT_NORMAL);
}
else isTicket = false;
decryptExeFs(ncch);
return isTicket && decryptExeFs(cxi);
}
void kernel9Loader(Arm9Bin *arm9Section)
@ -430,10 +452,10 @@ void kernel9Loader(Arm9Bin *arm9Section)
break;
}
u32 startOfArm9Bin = *(u32 *)((u8 *)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};
@ -474,7 +496,9 @@ void kernel9Loader(Arm9Bin *arm9Section)
//Decrypt ARM9 binary
aes_use_keyslot(arm9BinSlot);
aes((u8 *)arm9Section + 0x800, (u8 *)arm9Section + 0x800, arm9BinSize / AES_BLOCK_SIZE, arm9BinCtr, AES_CTR_MODE, AES_INPUT_BE | AES_INPUT_NORMAL);
aes(startOfArm9Bin, startOfArm9Bin, arm9BinSize / AES_BLOCK_SIZE, arm9BinCtr, AES_CTR_MODE, AES_INPUT_BE | AES_INPUT_NORMAL);
if(*startOfArm9Bin != 0x47704770 && *startOfArm9Bin != 0xB0862000) error("Error decrypting New 3DS ARM9 Binary.");
}
//Set >=9.6 KeyXs
@ -498,19 +522,20 @@ 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(ISA9LH)
{
if(isRestore)
{
if(didShaHashBackup) memcpy((void *)REG_SHA_HASH, shaHashBackup, sizeof(shaHashBackup));
}
else if(!didShaHashBackup) memcpy(shaHashBackup, (void *)REG_SHA_HASH, sizeof(shaHashBackup));
}
}

78
source/crypto.h
View File

@ -24,7 +24,6 @@
* 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
* 3ds type structs adapted from 3DBrew and https://github.com/mid-kid/CakesForeveryWan/blob/master/source/headers.h
*/
#pragma once
@ -102,86 +101,15 @@
#define SHA_224_HASH_SIZE (224 / 8)
#define SHA_1_HASH_SIZE (160 / 8)
typedef struct Ncch {
uint8_t sig[0x100]; //RSA-2048 signature of the NCCH header, using SHA-256
char magic[4]; //NCCH
uint32_t contentSize; //Media unit
uint8_t partitionId[8];
uint8_t makerCode[2];
uint16_t version;
uint8_t reserved1[4];
uint8_t programID[8];
uint8_t reserved2[0x10];
uint8_t logoHash[0x20]; //Logo Region SHA-256 hash
char productCode[0x10];
uint8_t exHeaderHash[0x20]; //Extended header SHA-256 hash
uint32_t exHeaderSize; //Extended header size
uint32_t reserved3;
uint8_t flags[8];
uint32_t plainOffset; //Media unit
uint32_t plainSize; //Media unit
uint32_t logoOffset; //Media unit
uint32_t logoSize; //Media unit
uint32_t exeFsOffset; //Media unit
uint32_t exeFsSize; //Media unit
uint32_t exeFsHashSize; //Media unit
uint32_t reserved4;
uint32_t romFsOffset; //Media unit
uint32_t romFsSize; //Media unit
uint32_t romFsHashSize; //Media unit
uint32_t reserved5;
uint8_t exeFsHash[0x20]; //ExeFS superblock SHA-256 hash
uint8_t romFsHash[0x20]; //RomFS superblock SHA-256 hash
} Ncch;
typedef struct Ticket
{
char sigIssuer[0x40];
uint8_t eccPubKey[0x3C];
uint8_t version;
uint8_t caCrlVersion;
uint8_t signerCrlVersion;
uint8_t titleKey[0x10];
uint8_t reserved1;
uint8_t ticketId[8];
uint8_t consoleId[4];
uint8_t titleId[8];
uint8_t reserved2[2];
uint16_t ticketTitleVersion;
uint8_t reserved3[8];
uint8_t licenseType;
uint8_t ticketCommonKeyYIndex; //Ticket common keyY index, usually 0x1 for retail system titles.
uint8_t reserved4[0x2A];
uint8_t unk[4]; //eShop Account ID?
uint8_t reserved5;
uint8_t audit;
uint8_t reserved6[0x42];
uint8_t limits[0x40];
uint8_t contentIndex[0xAC];
} Ticket;
typedef struct Arm9Bin {
uint8_t keyX[0x10];
uint8_t keyY[0x10];
uint8_t ctr[0x10];
char size[8];
uint8_t reserved[8];
uint8_t ctlBlock[0x10];
char magic[4];
uint8_t reserved2[0xC];
uint8_t slot0x16keyX[0x10];
} Arm9Bin;
extern u32 emuOffset;
extern bool isN3DS, isDevUnit, isA9lh;
extern FirmwareSource firmSource;
void ctrNandInit(void);
int ctrNandRead(u32 sector, u32 sectorCount, u8 *outbuf);
int ctrNandWrite(u32 sector, u32 sectorCount, u8 *inbuf);
void set6x7xKeys(void);
void decryptExeFs(Ncch *ncch);
void decryptNusFirm(const Ticket *ticket, Ncch *ncch, u32 ncchSize);
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);

81
source/emunand.c
View File

@ -25,6 +25,8 @@
#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 +52,7 @@ 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 +61,10 @@ 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 +72,7 @@ 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;
@ -93,52 +95,91 @@ 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};
//Looking for the last free space before Process9
return memsearch(pos + 0x13500, pattern, size - 0x13500, sizeof(pattern)) + 0x455;
*freeK9Space = memsearch(pos + 0x13500, pattern, size - 0x13500, sizeof(pattern)) + 0x455;
return *freeK9Space == NULL ? 1 : 0;
}
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;
}
static inline void patchNandRw(u8 *pos, u32 size, u32 branchOffset)
return ret;
}
static inline u32 patchNandRw(u8 *pos, u32 size, u32 branchOffset)
{
//Look for read/write code
const u8 pattern[] = {0x1E, 0x00, 0xC8, 0x05};
u32 ret = 0;
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));
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;
}
}
static inline void patchMpu(u8 *pos, u32 size)
return ret;
}
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));
if(off == NULL) ret = 1;
else
{
off[0] = 0x00360003;
off[6] = 0x00200603;
off[9] = 0x001C0603;
ret = 0;
}
void patchEmuNand(u8 *arm9Section, u32 arm9SectionSize, u8 *process9Offset, u32 process9Size, u32 emuHeader, u32 branchAdditive)
return ret;
}
u32 patchEmuNand(u8 *arm9Section, u8 *process9Offset, u32 process9Size, u32 emuHeader)
{
u32 ret = 0;
//Copy EmuNAND code
u8 *freeK9Space = getFreeK9Space(arm9Section, arm9SectionSize);
u8 *freeK9Space;
ret += getFreeK9Space(arm9Section, firm->section[2].size, &freeK9Space);
if(!ret)
{
memcpy(freeK9Space, emunand_bin, emunand_bin_size);
//Add the data of the found EmuNAND
@ -149,12 +190,16 @@ void patchEmuNand(u8 *arm9Section, u32 arm9SectionSize, u8 *process9Offset, u32
//Find and add the SDMMC struct
u32 *posSdmmc = (u32 *)memsearch(freeK9Space, "SDMC", emunand_bin_size, 4);
*posSdmmc = getSdmmc(process9Offset, process9Size);
u32 sdmmc;
ret += getSdmmc(process9Offset, process9Size, &sdmmc);
if(!ret) *posSdmmc = sdmmc;
//Add EmuNAND hooks
u32 branchOffset = (u32)freeK9Space - branchAdditive;
patchNandRw(process9Offset, process9Size, branchOffset);
ret += patchNandRw(process9Offset, process9Size, (u32)(freeK9Space - arm9Section + firm->section[2].address));
//Set MPU
patchMpu(arm9Section, arm9SectionSize);
ret += patchMpu(arm9Section, firm->section[2].size);
}
return ret;
}

6
source/emunand.h
View File

@ -24,11 +24,7 @@
#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, u8 *process9Offset, u32 process9Size, u32 emuHeader);

21
source/exceptions.c
View File

@ -45,17 +45,22 @@ 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 = 0;
u32 *mcuReboot;
for(mcuReboot = exceptionsPage; mcuReboot < (exceptionsPage + 0x400) && (mcuReboot[0] != 0xE59F4104 || mcuReboot[1] != 0xE3A0A0C2); mcuReboot++);
mcuReboot--;
u32 *initFPU;
for(initFPU = exceptionsPage; initFPU < exceptionsPage + 0x400 && (initFPU[0] != 0xE59F0008 || initFPU[1] != 0xE5900000); initFPU++);
if(initFPU == exceptionsPage + 0x400) ret = 1;
u32 *freeSpace;
for(freeSpace = initFPU; freeSpace < (exceptionsPage + 0x400) && (freeSpace[0] != 0xFFFFFFFF || freeSpace[1] != 0xFFFFFFFF); freeSpace++);
for(freeSpace = initFPU; freeSpace < exceptionsPage + 0x400 && (freeSpace[0] != 0xFFFFFFFF || freeSpace[1] != 0xFFFFFFFF); freeSpace++);
if(initFPU == exceptionsPage + 0x400) ret = 1;
u32 *mcuReboot;
for(mcuReboot = exceptionsPage; mcuReboot < exceptionsPage + 0x400 && (mcuReboot[0] != 0xE59F4104 || mcuReboot[1] != 0xE3A0A0C2); mcuReboot++);
if(initFPU == exceptionsPage + 0x400) ret = 1;
mcuReboot--;
memcpy(freeSpace, arm11_exceptions_bin + 32, arm11_exceptions_bin_size - 32);
@ -76,6 +81,8 @@ void installArm11Handlers(u32 *exceptionsPage, u32 stackAddress, u32 codeSetOffs
default: break;
}
}
return ret;
}
void detectAndProcessExceptionDumps(void)

2
source/exceptions.h
View File

@ -43,5 +43,5 @@ typedef struct __attribute__((packed))
} ExceptionDumpHeader;
void installArm9Handlers(void);
void installArm11Handlers(u32 *exceptionsPage, u32 stackAddress, u32 codeSetOffset);
u32 installArm11Handlers(u32 *exceptionsPage, u32 stackAddress, u32 codeSetOffset);
void detectAndProcessExceptionDumps(void);

397
source/firm.c
View File

@ -31,256 +31,11 @@
#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 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 isSdMode)
{
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 SD or CTRNAND
Fs fsStatus;
if(mountFs(true)) fsStatus = SD_CARD;
else
{
firmSource = FIRMWARE_SYSNAND;
fsStatus = (mountFs(false) && switchToCtrNand()) ? CTRNAND : NONE;
}
//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(fsStatus == NONE) error("Error mounting SD and CTRNAND.");
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(fsStatus, 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();
if(fsStatus == CTRNAND) nandType = FIRMWARE_SYSNAND;
//If R is pressed, boot the non-updated NAND with the FIRM of the opposite one
else if(pressed & BUTTON_R1)
{
//Determine if the user chose to use the SysNAND FIRM as default for a R boot
bool useSysAsDefault = isA9lh ? CONFIG(USESYSFIRM) : false;
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 loadFromStorage = CONFIG(LOADEXTFIRMSANDMODULES);
u32 firmVersion = loadFirm(&firmType, firmSource, loadFromStorage, fsStatus);
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, loadFromStorage);
}
static inline u32 loadFirm(FirmwareType *firmType, FirmwareSource firmSource, bool loadFromStorage, Fs fsStatus)
{
section = firm->section;
const char *firmwareFiles[] = {
"luma/firmware.bin",
"luma/firmware_twl.bin",
@ -294,7 +49,7 @@ static inline u32 loadFirm(FirmwareType *firmType, FirmwareSource firmSource, bo
"luma/cetk_safe"
};
if(fsStatus == SD_CARD && !mountFs(false)) error("Error mounting CTRNAND.");
if(isSdMode && !mountFs(false)) error("Error mounting CTRNAND.");
//Load FIRM from CTRNAND
u32 firmVersion = firmRead(firm, (u32)*firmType);
@ -303,12 +58,12 @@ static inline u32 loadFirm(FirmwareType *firmType, FirmwareSource firmSource, bo
bool mustLoadFromStorage = false;
if(!isN3DS && *firmType == NATIVE_FIRM)
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.");
@ -324,19 +79,19 @@ static inline u32 loadFirm(FirmwareType *firmType, FirmwareSource firmSource, bo
{
u32 firmSize = fileRead(firm, *firmType == NATIVE_FIRM1X2X ? firmwareFiles[0] : firmwareFiles[(u32)*firmType], 0x400000);
if(firmSize > 0)
if(firmSize > sizeof(Cxi))
{
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((Ticket *)&cetk[0x140], (Ncch *)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 firmware.bin in /luma is encrypted\nor corrupted.");
}
//Check that the 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))
if((firm->section[3].offset ? firm->section[3].address : firm->section[2].address) != (ISN3DS ? (u8 *)0x8006000 : (u8 *)0x8006800))
error("The firmware.bin in /luma is not valid for this\nconsole.");
firmVersion = 0xFFFFFFFF;
@ -346,18 +101,18 @@ static inline u32 loadFirm(FirmwareType *firmType, FirmwareSource firmSource, bo
if(firmVersion != 0xFFFFFFFF)
{
if(mustLoadFromStorage) error("An old unsupported FIRM has been detected.\nCopy a firmware.bin in /luma to boot.");
decryptExeFs((Ncch *)firm);
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, 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((Arm9Bin *)arm9Section);
@ -365,41 +120,39 @@ static inline void patchNativeFirm(u32 firmVersion, FirmwareSource nandType, u32
}
//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 + 0x15000, firm->section[2].size - 0x15000, &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 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, process9Offset, process9Size, emuHeader);
//Apply FIRM0/1 writes patches on sysNAND to protect A9LH
else if(isA9lh) patchFirmWrites(process9Offset, process9Size);
else if(ISA9LH || (ISFIRMLAUNCH && BOOTCFG_A9LH != 0)) 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);
@ -408,69 +161,103 @@ static inline void patchNativeFirm(u32 firmVersion, FirmwareSource nandType, u32
implementSvcGetCFWInfo(arm11Section1, arm11SvcTable, baseK11VA, &freeK11Space);
//Apply UNITINFO patch
if(devMode == 2) patchUnitInfoValueSet(arm9Section, section[2].size);
if(devMode == 2) ret += patchUnitInfoValueSet(arm9Section, firm->section[2].size);
if(devMode != 0 && isA9lh)
if(devMode != 0 && ISA9LH)
{
//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, firm->section[2].size);
ret += patchSvcBreak9(arm9Section, firm->section[2].size, (u32)firm->section[2].address);
ret += patchKernel9Panic(arm9Section, firm->section[2].size);
}
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);
}
static inline void patchLegacyFirm(FirmwareType firmType, u32 firmVersion, u32 devMode)
return ret;
}
u32 patchTwlFirm(u32 firmVersion, u32 devMode)
{
u8 *arm9Section = (u8 *)firm + section[3].offset;
u8 *arm9Section = (u8 *)firm + firm->section[3].offset;
u32 ret = 0;
//On N3DS, decrypt ARM9Bin and patch ARM9 entrypoint to skip kernel9loader
if(isN3DS)
if(ISN3DS)
{
kernel9Loader((Arm9Bin *)arm9Section);
firm->arm9Entry = (u8 *)0x801301C;
}
if(isN3DS || firmVersion >= (firmType == TWL_FIRM ? 0x16 : 0xB))
applyLegacyFirmPatches((u8 *)firm, firmType);
ret += patchLgySignatureChecks(arm9Section, firm->section[3].size);
ret += patchTwlInvalidSignatureChecks(arm9Section, firm->section[3].size);
ret += patchTwlNintendoLogoChecks(arm9Section, firm->section[3].size);
ret += patchTwlWhitelistChecks(arm9Section, firm->section[3].size);
if(!ISN3DS && firmVersion == 0x11) ret += patchOldTwlFlashcartChecks(arm9Section, firm->section[3].size);
else ret += patchTwlFlashcartChecks(arm9Section, firm->section[3].size, firmVersion);
ret += patchTwlShaHashChecks(arm9Section, firm->section[3].size);
//Apply UNITINFO patch
if(devMode == 2) patchUnitInfoValueSet(arm9Section, section[3].size);
if(devMode == 2) ret += patchUnitInfoValueSet(arm9Section, firm->section[3].size);
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;
u32 ret = 0;
if(isN3DS)
//On N3DS, decrypt ARM9Bin and patch ARM9 entrypoint to skip kernel9loader
if(ISN3DS)
{
kernel9Loader((Arm9Bin *)arm9Section);
firm->arm9Entry = (u8 *)0x801301C;
}
ret += patchLgySignatureChecks(arm9Section, firm->section[3].size);
if(CONFIG(SHOWGBABOOT)) ret += patchAgbBootSplash(arm9Section, firm->section[3].size);
//Apply UNITINFO patch
if(devMode == 2) ret += patchUnitInfoValueSet(arm9Section, firm->section[3].size);
return ret;
}
u32 patch1x2xNativeAndSafeFirm(u32 devMode)
{
u8 *arm9Section = (u8 *)firm + firm->section[2].offset;
u32 ret = 0;
if(ISN3DS)
{
//Decrypt ARM9Bin and patch ARM9 entrypoint to skip kernel9loader
kernel9Loader((Arm9Bin *)arm9Section);
firm->arm9Entry = (u8 *)0x801B01C;
patchFirmWrites(arm9Section, section[2].size);
ret += patchFirmWrites(arm9Section, firm->section[2].size);
}
else patchOldFirmWrites(arm9Section, section[2].size);
else ret += patchOldFirmWrites(arm9Section, firm->section[2].size);
if(devMode != 0)
{
//ARM9 exception handlers
patchArm9ExceptionHandlersInstall(arm9Section, section[2].size);
patchSvcBreak9(arm9Section, section[2].size, (u32)section[2].address);
ret += patchArm9ExceptionHandlersInstall(arm9Section, firm->section[2].size);
ret += patchSvcBreak9(arm9Section, firm->section[2].size, (u32)firm->section[2].address);
}
return ret;
}
static inline void copySection0AndInjectSystemModules(FirmwareType firmType, bool loadFromStorage)
@ -478,11 +265,11 @@ static inline void copySection0AndInjectSystemModules(FirmwareType firmType, boo
u32 srcModuleSize,
dstModuleSize;
for(u8 *src = (u8 *)firm + section[0].offset, *srcEnd = src + section[0].size, *dst = section[0].address;
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)
{
srcModuleSize = ((Ncch *)src)->contentSize * 0x200;
const char *moduleName = (char *)(src + 0x200);
srcModuleSize = ((Cxi *)src)->ncch.contentSize * 0x200;
const char *moduleName = ((Cxi *)src)->exHeader.systemControlInfo.appTitle;
u32 fileSize;
@ -520,7 +307,7 @@ static inline void copySection0AndInjectSystemModules(FirmwareType firmType, boo
}
}
static inline void launchFirm(FirmwareType firmType, bool loadFromStorage)
void launchFirm(FirmwareType firmType, bool loadFromStorage)
{
//Allow module injection and/or inject 3ds_injector on new NATIVE_FIRMs and LGY FIRMs
u32 sectionNum;
@ -532,12 +319,12 @@ static inline void launchFirm(FirmwareType firmType, bool loadFromStorage)
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();

35
source/firm.h
View File

@ -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 loadFromStorage, Fs fsStatus);
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 loadFromStorage);
u32 loadFirm(FirmwareType *firmType, FirmwareSource nandType, bool loadFromStorage, bool isSdMode);
u32 patchNativeFirm(u32 firmVersion, FirmwareSource nandType, u32 emuHeader, u32 devMode);
u32 patchTwlFirm(u32 firmVersion, u32 devMode);
u32 patchAgbFirm(u32 devMode);
u32 patch1x2xNativeAndSafeFirm(u32 devMode);
void launchFirm(FirmwareType firmType, bool loadFromStorage);

4
source/fs.c
View File

@ -144,7 +144,7 @@ void loadPayload(u32 pressed)
{
loaderAddress[1] = payloadSize;
if(isA9lh) restoreShaHashBackup();
backupAndRestoreShaHash(true);
initScreens();
flushDCacheRange(loaderAddress, loader_bin_size);
@ -163,7 +163,7 @@ 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;

2
source/fs.h
View File

@ -26,8 +26,6 @@
#define PATTERN(a) a "_*.bin"
extern bool isN3DS, isA9lh;
bool mountFs(bool isSd);
bool switchToCtrNand(void);
u32 fileRead(void *dest, const char *path, u32 maxSize);

249
source/main.c Normal file
View File

@ -0,0 +1,249 @@
/*
* 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 "buttons.h"
#include "pin.h"
extern CfgData configData;
extern FirmwareSource firmSource;
void main(void)
{
u32 configTemp,
emuHeader;
FirmwareType firmType;
FirmwareSource nandType;
ConfigurationStatus needConfig;
//Mount SD or CTRNAND
bool isSdMode;
if(mountFs(true)) isSdMode = true;
else
{
firmSource = FIRMWARE_SYSNAND;
if(!mountFs(false) || !switchToCtrNand()) error("Error mounting 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) 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;
}
else
{
if(ISA9LH)
{
detectAndProcessExceptionDumps();
installArm9Handlers();
}
firmType = NATIVE_FIRM;
//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;
}
}
//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) && !(pressed & BUTTON_L1));
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;
//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();
//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)
{
//Determine if the user chose to use the SysNAND FIRM as default for a R boot
bool useSysAsDefault = ISA9LH ? CONFIG(USESYSFIRM) : false;
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 loadFromStorage = CONFIG(LOADEXTFIRMSANDMODULES);
u32 firmVersion = loadFirm(&firmType, firmSource, loadFromStorage, isSdMode);
u32 devMode = MULTICONFIG(DEVOPTIONS);
u32 res;
switch(firmType)
{
case NATIVE_FIRM:
res = patchNativeFirm(firmVersion, nandType, emuHeader, devMode);
break;
case SAFE_FIRM:
case NATIVE_FIRM1X2X:
res = ISA9LH ? patch1x2xNativeAndSafeFirm(devMode) : 0;
break;
case TWL_FIRM:
res = patchTwlFirm(firmVersion, devMode);
break;
case AGB_FIRM:
res = patchAgbFirm(devMode);
break;
}
if(res != 0) error("Error applying FIRM patches.");
launchFirm(firmType, loadFromStorage);
}

496
source/patches.c
View File

@ -28,58 +28,91 @@
#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("Error getting 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.contentSize * 0x200;
*process9MemAddr = off->exHeader.systemControlInfo.textCodeSet.address;
return (u8 *)off + (off->ncch.exeFsOffset * 0x200) + 0x200;
}
u32 *getKernel11Info(u8 *pos, u32 size, u32 *baseK11VA, u8 **freeK11Space, u32 **arm11SvcHandler, u32 **arm11ExceptionsPage)
{
const u8 pattern[] = {0x00, 0xB0, 0x9C, 0xE5};
bool ret = true;
*arm11ExceptionsPage = (u32 *)memsearch(pos, pattern, size, sizeof(pattern)) - 0xB;
*arm11ExceptionsPage = (u32 *)memsearch(pos, pattern, size, sizeof(pattern));
u32 *arm11SvcTable;
if(*arm11ExceptionsPage == NULL) ret = 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
u32 *arm11SvcTable = (u32 *)(pos + *(u32 *)(pos + pointedInstructionVA - *baseK11VA + 8) - *baseK11VA); //SVC handler address
*arm11SvcHandler = arm11SvcTable;
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) ret = false;
else (*freeK11Space)++;
if(!ret) error("Error getting 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));
if(off == NULL || temp == NULL) ret = 1;
else
{
u16 *off2 = (u16 *)(temp - 1);
*off = off2[0] = 0x2000;
off2[1] = 0x4770;
ret = 0;
}
void patchFirmlaunches(u8 *pos, u32 size, u32 process9MemAddr)
return ret;
}
u32 patchFirmlaunches(u8 *pos, u32 size, u32 process9MemAddr)
{
//Look for firmlaunch code
const u8 pattern[] = {0xE2, 0x20, 0x20, 0x90};
u32 ret;
u8 *off = memsearch(pos, pattern, size, sizeof(pattern)) - 0x13;
u8 *off = memsearch(pos, pattern, size, sizeof(pattern));
if(off == NULL) ret = 1;
else
{
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);
@ -91,6 +124,8 @@ void patchFirmlaunches(u8 *pos, u32 size, u32 process9MemAddr)
u32 *pos_fopen = (u32 *)memsearch(off, "OPEN", reboot_bin_size, 4);
*pos_fopen = fOpenOffset;
ret = 0;
if(CONFIG(USECUSTOMPATH))
{
const char pathPath[] = "luma/path.txt";
@ -118,27 +153,54 @@ void patchFirmlaunches(u8 *pos, u32 size, u32 process9MemAddr)
}
}
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;
return ret;
}
void patchOldFirmWrites(u8 *pos, u32 size)
u32 patchFirmWrites(u8 *pos, u32 size)
{
u32 ret;
//Look for FIRM writing code
u8 *off = memsearch(pos, "exe:", size, 4);
if(off == NULL) ret = 1;
else
{
const u8 pattern[] = {0x00, 0x28, 0x01, 0xDA};
u16 *off2 = (u16 *)memsearch(off - 0x100, pattern, 0x100, sizeof(pattern));
if(off2 == NULL) ret = 1;
else
{
off2[0] = 0x2000;
off2[1] = 0x46C0;
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;
}
void reimplementSvcBackdoor(u8 *pos, u32 *arm11SvcTable, u32 baseK11VA, u8 **freeK11Space)
@ -192,67 +254,39 @@ void implementSvcGetCFWInfo(u8 *pos, u32 *arm11SvcTable, u32 baseK11VA, u8 **fre
*freeK11Space += svcGetCFWInfo_bin_size;
}
void patchTitleInstallMinVersionCheck(u8 *pos, u32 size)
u32 patchTitleInstallMinVersionChecks(u8 *pos, u32 size, u32 firmVersion)
{
const u8 pattern[] = {0x0A, 0x81, 0x42, 0x02};
u32 ret = 0;
u8 *off = memsearch(pos, pattern, size, sizeof(pattern));
if(off != NULL) off[4] = 0xE0;
if(off == NULL)
{
if(firmVersion != 0xFFFFFFFF) ret = 1;
}
else off[4] = 0xE0;
return ret;
}
void applyLegacyFirmPatches(u8 *pos, FirmwareType firmType)
u32 patchArm9ExceptionHandlersInstall(u8 *pos, u32 size)
{
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}
};
const u8 pattern[] = {0x80, 0xE5, 0x40, 0x1C};
u32 ret;
/* 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;
u8 *temp = memsearch(pos, pattern, size, sizeof(pattern));
//Patch
for(u32 i = 0; i < numPatches; i++)
if(temp == NULL) ret = 1;
else
{
switch(patches[i].type)
{
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;
}
}
}
void patchArm9ExceptionHandlersInstall(u8 *pos, u32 size)
{
const u8 pattern[] = {0x03, 0xA0, 0xE3, 0x18};
u32 *off = (u32 *)(memsearch(pos, pattern, size, sizeof(pattern)) + 0x13);
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) continue;
if((*off & 0xFE5F0000) == 0xE4000000)
{
u32 rD = (*off >> 12) & 0xF,
offset = (*off & 0xFFF) * ((((*off >> 23) & 1) == 0) ? -1 : 1);
bool writeback = ((*off >> 21) & 1) != 0,
@ -267,31 +301,62 @@ void patchArm9ExceptionHandlersInstall(u8 *pos, u32 size)
}
}
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
u32 *loadCodeSet = (u32 *)(memsearch(pos, pattern, size, sizeof(pattern)) - 0xB);
*codeSetOffset = *loadCodeSet & 0xFFF;
return *(u32 *)(memsearch(pos, pattern2, size, sizeof(pattern2)) + 0xD);
ret = 0;
}
void patchSvcBreak9(u8 *pos, u32 size, u32 kernel9Address)
return ret;
}
u32 getInfoForArm11ExceptionHandlers(u8 *pos, u32 size, u32 *codeSetOffset)
{
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));
if(loadCodeSet == NULL) ret = false;
else
{
loadCodeSet -= 2;
*codeSetOffset = *loadCodeSet & 0xFFF;
}
u8 *temp = memsearch(pos, pattern2, size, sizeof(pattern2));
u32 stackAddress;
if(temp == NULL) ret = false;
else stackAddress = *(u32 *)(temp + 9);
if(!ret) error("Error getting ARM11 exception handlers data.");
return stackAddress;
}
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 */
//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));
if(arm9SvcTable == NULL) ret = 1;
else
{
while(*arm9SvcTable) arm9SvcTable++; //Look for SVC0 (NULL)
u32 *addr = (u32 *)(pos + arm9SvcTable[0x3C] - kernel9Address);
*addr = 0xE12FFF7F;
ret = 0;
}
return ret;
}
void patchSvcBreak11(u8 *pos, u32 *arm11SvcTable)
@ -301,53 +366,103 @@ 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);
u8 *temp = memsearch(pos, pattern, size, sizeof(pattern));
if(temp == NULL) ret = 1;
else
{
u32 *off = (u32 *)(temp - 0x12);
*off = 0xE12FFF7E;
ret = 0;
}
void patchKernel11Panic(u8 *pos, u32 size)
return ret;
}
u32 patchKernel11Panic(u8 *pos, u32 size)
{
const u8 pattern[] = {0x02, 0x0B, 0x44, 0xE2};
u32 ret;
u32 *off = (u32 *)memsearch(pos, pattern, size, sizeof(pattern));
if(off == NULL) ret = 1;
else
{
*off = 0xE12FFF7E;
ret = 0;
}
void patchP9AccessChecks(u8 *pos, u32 size)
{
const u8 pattern[] = {0xE0, 0x00, 0x40, 0x39};
return ret;
}
u16 *off = (u16 *)memsearch(pos, pattern, size, sizeof(pattern)) - 7;
u32 patchP9AccessChecks(u8 *pos, u32 size)
{
const u8 pattern[] = {0x00, 0x08, 0x49, 0x68};
u32 ret;
u8 *temp = memsearch(pos, pattern, size, sizeof(pattern));
if(temp == NULL) ret = 1;
else
{
u16 *off = (u16 *)(temp - 3);
off[0] = 0x2001; //mov r0, #1
off[1] = 0x4770; //bx lr
ret = 0;
}
void patchArm11SvcAccessChecks(u32 *arm11SvcHandler)
return ret;
}
u32 patchArm11SvcAccessChecks(u32 *arm11SvcHandler, u32 *endPos)
{
u32 ret;
while(*arm11SvcHandler != 0xE11A0E1B && arm11SvcHandler < endPos) arm11SvcHandler++; //TST R10, R11,LSL LR
if(arm11SvcHandler == endPos) ret = 1;
else
{
while(*arm11SvcHandler != 0xE11A0E1B) arm11SvcHandler++; //TST R10, R11,LSL LR
*arm11SvcHandler = 0xE3B0A001; //MOVS R10, #1
ret = 0;
}
void patchK11ModuleChecks(u8 *pos, u32 size, u8 **freeK11Space)
return ret;
}
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 */
u32 ret = 0;
//Check that we have enough free space
if(*(u32 *)(*freeK11Space + k11modules_bin_size - 4) == 0xFFFFFFFF)
{
//Look for the code that decompresses the .code section of the builtin modules
const u8 pattern[] = {0xE5, 0x48, 0x00, 0x9D};
u8 *temp = memsearch(pos, pattern, size, sizeof(pattern));
if(temp == NULL) ret = 1;
else
{
//Inject our code into the free space
memcpy(*freeK11Space, k11modules_bin, k11modules_bin_size);
//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);
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);
@ -356,13 +471,196 @@ void patchK11ModuleChecks(u8 *pos, u32 size, u8 **freeK11Space)
}
}
void patchUnitInfoValueSet(u8 *pos, u32 size)
return ret;
}
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;
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;
u8 *temp = memsearch(pos, pattern, size, sizeof(pattern));
if(temp == NULL) ret = 1;
else
{
u16 *off = (u16 *)temp + 1;
off[0] = 0x2000;
off[1] = 0;
ret = 0;
}
return ret;
}
u32 patchTwlWhitelistChecks(u8 *pos, u32 size)
{
const u8 pattern[] = {0x22, 0x00, 0x20, 0x30};
u32 ret;
u8 *temp = memsearch(pos, pattern, size, sizeof(pattern));
if(temp == NULL) ret = 1;
else
{
u16 *off = (u16 *)temp + 2;
off[0] = 0x2000;
off[1] = 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] = 0x2001; //mov r0, #1
off[1] = 0; //nop
off[6] = 0x2001; //mov r0, #1
off[7] = 0; //nop
off[0xC] = 0x2001; //mov r0, #1
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] = 0x2001; //mov r0, #1
off[1] = 0; //nop
off[6] = 0x2001; //mov r0, #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 = 0x26;
ret = 0;
}
return ret;
}

48
source/patches.h
View File

@ -28,15 +28,6 @@
#include "types.h"
typedef struct patchData {
u32 offset[2];
union {
u8 type0[8];
u16 type1;
} patch;
u32 type;
} patchData;
typedef struct __attribute__((packed))
{
char magic[4];
@ -51,25 +42,32 @@ typedef struct __attribute__((packed))
u32 config;
} CFWInfo;
extern bool isDevUnit;
extern CfgData configData;
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);
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);
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 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);

9
source/pin.h
View File

@ -32,14 +32,5 @@
#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);

4
source/screen.h
View File

@ -44,7 +44,9 @@ 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);

38
source/types.h
View File

@ -36,9 +36,37 @@ 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 enum FirmwareSource
{
FIRMWARE_SYSNAND = 0,
@ -57,9 +85,5 @@ typedef enum FirmwareType
NATIVE_FIRM1X2X
} FirmwareType;
typedef enum Fs
{
SD_CARD = 0,
CTRNAND,
NONE
} Fs;
extern u16 launchedFirmTidLow[8]; //Defined in start.s
static Firm *const firm = (Firm *)0x24000000;

6
source/utils.c
View File

@ -56,7 +56,7 @@ u32 waitInput(void)
void mcuReboot(void)
{
if(!isFirmlaunch && PDN_GPU_CNT != 1) clearScreens(true, true, false);
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();
@ -67,7 +67,7 @@ void mcuReboot(void)
void mcuPowerOff(void)
{
if(!isFirmlaunch && PDN_GPU_CNT != 1) clearScreens(true, true, false);
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();
@ -112,7 +112,7 @@ void chrono(u32 seconds)
void error(const char *message)
{
if(isFirmlaunch) mcuReboot();
if(ISFIRMLAUNCH) mcuReboot();
initScreens();

2
source/utils.h
View File

@ -28,8 +28,6 @@
#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);