593 lines
16 KiB
C
593 lines
16 KiB
C
/*
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* This file is part of Luma3DS
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* Copyright (C) 2016 Aurora Wright, TuxSH
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* Additional Terms 7.b of GPLv3 applies to this file: Requiring preservation of specified
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* reasonable legal notices or author attributions in that material or in the Appropriate Legal
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* Notices displayed by works containing it.
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*/
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/*
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* Signature patches by an unknown author
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* firmlaunches patching code originally by delebile
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* FIRM partition writes patches by delebile
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* ARM11 modules patching code originally by Subv
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* Idea for svcBreak patches from yellows8 and others on #3dsdev
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*/
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#include "patches.h"
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#include "fs.h"
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#include "memory.h"
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#include "config.h"
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#include "utils.h"
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#include "../build/bundled.h"
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static inline void pathChanger(u8 *pos)
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{
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const char *pathFile = "path.txt";
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u8 path[57];
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u32 pathSize = fileRead(path, pathFile, sizeof(path));
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if(pathSize < 6) return;
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if(path[pathSize - 1] == 0xA) pathSize--;
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if(path[pathSize - 1] == 0xD) pathSize--;
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if(pathSize < 6 || pathSize > 55 || path[0] != '/' || memcmp(path + pathSize - 4, ".bin", 4) != 0) return;
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u16 finalPath[56];
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for(u32 i = 0; i < pathSize; i++)
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finalPath[i] = (u16)path[i];
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finalPath[pathSize] = 0;
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u8 *posPath = memsearch(pos, u"sd", reboot_bin_size, 4) + 0xA;
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memcpy(posPath, finalPath, (pathSize + 1) * 2);
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}
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u8 *getProcess9Info(u8 *pos, u32 size, u32 *process9Size, u32 *process9MemAddr)
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{
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u8 *temp = memsearch(pos, "NCCH", size, 4);
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if(temp == NULL) error("Failed to get Process9 data.");
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Cxi *off = (Cxi *)(temp - 0x100);
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*process9Size = (off->ncch.exeFsSize - 1) * 0x200;
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*process9MemAddr = off->exHeader.systemControlInfo.textCodeSet.address;
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return (u8 *)off + (off->ncch.exeFsOffset + 1) * 0x200;
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}
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u32 *getKernel11Info(u8 *pos, u32 size, u32 *baseK11VA, u8 **freeK11Space, u32 **arm11SvcHandler, u32 **arm11ExceptionsPage)
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{
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const u8 pattern[] = {0x00, 0xB0, 0x9C, 0xE5},
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pattern2[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
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*arm11ExceptionsPage = (u32 *)memsearch(pos, pattern, size, sizeof(pattern));
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*freeK11Space = memsearch(pos, pattern2, size, sizeof(pattern2));
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if(*arm11ExceptionsPage == NULL || *freeK11Space == NULL) error("Failed to get Kernel11 data.");
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u32 *arm11SvcTable;
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*arm11ExceptionsPage -= 0xB;
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u32 svcOffset = (-(((*arm11ExceptionsPage)[2] & 0xFFFFFF) << 2) & (0xFFFFFF << 2)) - 8; //Branch offset + 8 for prefetch
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u32 pointedInstructionVA = 0xFFFF0008 - svcOffset;
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*baseK11VA = pointedInstructionVA & 0xFFFF0000; //This assumes that the pointed instruction has an offset < 0x10000, iirc that's always the case
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arm11SvcTable = *arm11SvcHandler = (u32 *)(pos + *(u32 *)(pos + pointedInstructionVA - *baseK11VA + 8) - *baseK11VA); //SVC handler address
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while(*arm11SvcTable) arm11SvcTable++; //Look for SVC0 (NULL)
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(*freeK11Space)++;
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return arm11SvcTable;
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}
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u32 patchSignatureChecks(u8 *pos, u32 size)
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{
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//Look for signature checks
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const u8 pattern[] = {0xC0, 0x1C, 0x76, 0xE7},
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pattern2[] = {0xB5, 0x22, 0x4D, 0x0C};
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u16 *off = (u16 *)memsearch(pos, pattern, size, sizeof(pattern));
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u8 *temp = memsearch(pos, pattern2, size, sizeof(pattern2));
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if(off == NULL || temp == NULL) return 1;
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u16 *off2 = (u16 *)(temp - 1);
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*off = off2[0] = 0x2000;
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off2[1] = 0x4770;
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return 0;
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}
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u32 patchFirmlaunches(u8 *pos, u32 size, u32 process9MemAddr)
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{
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//Look for firmlaunch code
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const u8 pattern[] = {0xE2, 0x20, 0x20, 0x90};
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u8 *off = memsearch(pos, pattern, size, sizeof(pattern));
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if(off == NULL) return 1;
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off -= 0x13;
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//Firmlaunch function offset - offset in BLX opcode (A4-16 - ARM DDI 0100E) + 1
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u32 fOpenOffset = (u32)(off + 9 - (-((*(u32 *)off & 0x00FFFFFF) << 2) & (0xFFFFFF << 2)) - pos + process9MemAddr);
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//Copy firmlaunch code
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memcpy(off, reboot_bin, reboot_bin_size);
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//Put the fOpen offset in the right location
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u32 *pos_fopen = (u32 *)memsearch(off, "OPEN", reboot_bin_size, 4);
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*pos_fopen = fOpenOffset;
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if(CONFIG(USECUSTOMPATH)) pathChanger(off);
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return 0;
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}
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u32 patchFirmWrites(u8 *pos, u32 size)
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{
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//Look for FIRM writing code
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u8 *off = memsearch(pos, "exe:", size, 4);
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if(off == NULL) return 1;
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const u8 pattern[] = {0x00, 0x28, 0x01, 0xDA};
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u16 *off2 = (u16 *)memsearch(off - 0x100, pattern, 0x100, sizeof(pattern));
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if(off2 == NULL) return 1;
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off2[0] = 0x2000;
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off2[1] = 0x46C0;
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return 0;
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}
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u32 patchOldFirmWrites(u8 *pos, u32 size)
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{
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//Look for FIRM writing code
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const u8 pattern[] = {0x04, 0x1E, 0x1D, 0xDB};
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u16 *off = (u16 *)memsearch(pos, pattern, size, sizeof(pattern));
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if(off == NULL) return 1;
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off[0] = 0x2400;
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off[1] = 0xE01D;
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return 0;
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}
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u32 patchTitleInstallMinVersionChecks(u8 *pos, u32 size, u32 firmVersion)
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{
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const u8 pattern[] = {0xFF, 0x00, 0x00, 0x02};
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u8 *off = memsearch(pos, pattern, size, sizeof(pattern));
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if(off == NULL) return firmVersion == 0xFFFFFFFF ? 0 : 1;
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off++;
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//Zero out the first TitleID in the list
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memset32(off, 0, 8);
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return 0;
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}
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u32 patchZeroKeyNcchEncryptionCheck(u8 *pos, u32 size)
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{
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const u8 pattern[] = {0x28, 0x2A, 0xD0, 0x08};
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u8 *temp = memsearch(pos, pattern, size, sizeof(pattern));
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if(temp == NULL) return 1;
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u16 *off = (u16 *)(temp - 1);
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*off = 0x2001; //mov r0, #1
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return 0;
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}
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u32 patchNandNcchEncryptionCheck(u8 *pos, u32 size)
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{
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const u8 pattern[] = {0x07, 0xD1, 0x28, 0x7A};
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u16 *off = (u16 *)memsearch(pos, pattern, size, sizeof(pattern));
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if(off == NULL) return 1;
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off--;
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*off = 0x2001; //mov r0, #1
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return 0;
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}
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u32 patchCheckForDevCommonKey(u8 *pos, u32 size)
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{
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const u8 pattern[] = {0x03, 0x7C, 0x28, 0x00};
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u16 *off = (u16 *)memsearch(pos, pattern, size, sizeof(pattern));
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if(off == NULL) return 1;
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*off = 0x2301; //mov r3, #1
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return 0;
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}
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u32 reimplementSvcBackdoor(u8 *pos, u32 *arm11SvcTable, u32 baseK11VA, u8 **freeK11Space)
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{
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if(arm11SvcTable[0x7B] != 0) return 0;
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//Official implementation of svcBackdoor
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const u8 svcBackdoor[] = {0xFF, 0x10, 0xCD, 0xE3, //bic r1, sp, #0xff
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0x0F, 0x1C, 0x81, 0xE3, //orr r1, r1, #0xf00
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0x28, 0x10, 0x81, 0xE2, //add r1, r1, #0x28
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0x00, 0x20, 0x91, 0xE5, //ldr r2, [r1]
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0x00, 0x60, 0x22, 0xE9, //stmdb r2!, {sp, lr}
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0x02, 0xD0, 0xA0, 0xE1, //mov sp, r2
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0x30, 0xFF, 0x2F, 0xE1, //blx r0
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0x03, 0x00, 0xBD, 0xE8, //pop {r0, r1}
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0x00, 0xD0, 0xA0, 0xE1, //mov sp, r0
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0x11, 0xFF, 0x2F, 0xE1}; //bx r1
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if(*(u32 *)(*freeK11Space + sizeof(svcBackdoor) - 4) != 0xFFFFFFFF) return 1;
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memcpy(*freeK11Space, svcBackdoor, sizeof(svcBackdoor));
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arm11SvcTable[0x7B] = baseK11VA + *freeK11Space - pos;
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*freeK11Space += sizeof(svcBackdoor);
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return 0;
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}
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u32 implementSvcGetCFWInfo(u8 *pos, u32 *arm11SvcTable, u32 baseK11VA, u8 **freeK11Space, bool isSafeMode)
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{
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if(*(u32 *)(*freeK11Space + svcGetCFWInfo_bin_size - 4) != 0xFFFFFFFF) return 1;
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memcpy(*freeK11Space, svcGetCFWInfo_bin, svcGetCFWInfo_bin_size);
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struct CfwInfo
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{
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char magic[4];
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u8 versionMajor;
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u8 versionMinor;
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u8 versionBuild;
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u8 flags;
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u32 commitHash;
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u32 config;
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} __attribute__((packed)) *info = (struct CfwInfo *)memsearch(*freeK11Space, "LUMA", svcGetCFWInfo_bin_size, 4);
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const char *rev = REVISION;
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info->commitHash = COMMIT_HASH;
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info->config = configData.config;
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info->versionMajor = (u8)(rev[1] - '0');
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info->versionMinor = (u8)(rev[3] - '0');
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bool isRelease;
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if(rev[4] == '.')
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{
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info->versionBuild = (u8)(rev[5] - '0');
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isRelease = rev[6] == 0;
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}
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else isRelease = rev[4] == 0;
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if(isRelease) info->flags = 1;
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if(ISN3DS) info->flags |= 1 << 4;
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if(isSafeMode) info->flags |= 1 << 5;
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arm11SvcTable[0x2E] = baseK11VA + *freeK11Space - pos; //Stubbed svc
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*freeK11Space += svcGetCFWInfo_bin_size;
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return 0;
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}
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u32 patchArm9ExceptionHandlersInstall(u8 *pos, u32 size)
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{
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const u8 pattern[] = {0x80, 0xE5, 0x40, 0x1C};
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u8 *temp = memsearch(pos, pattern, size, sizeof(pattern));
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if(temp == NULL) return 1;
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u32 *off = (u32 *)(temp - 0xA);
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for(u32 r0 = 0x08000000; *off != 0xE3A01040; off++) //Until mov r1, #0x40
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{
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//Discard everything that's not str rX, [r0, #imm](!)
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if((*off & 0xFE5F0000) != 0xE4000000) continue;
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u32 rD = (*off >> 12) & 0xF,
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offset = (*off & 0xFFF) * ((((*off >> 23) & 1) == 0) ? -1 : 1);
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bool writeback = ((*off >> 21) & 1) != 0,
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pre = ((*off >> 24) & 1) != 0;
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u32 addr = r0 + ((pre || !writeback) ? offset : 0);
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if((addr & 7) != 0 && addr != 0x08000014 && addr != 0x08000004) *off = 0xE1A00000; //nop
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else *off = 0xE5800000 | (rD << 12) | (addr & 0xFFF); //Preserve IRQ and SVC handlers
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if(!pre) addr += offset;
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if(writeback) r0 = addr;
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}
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return 0;
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}
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u32 getInfoForArm11ExceptionHandlers(u8 *pos, u32 size, u32 *codeSetOffset)
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{
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const u8 pattern[] = {0x1B, 0x50, 0xA0, 0xE3}, //Get TitleID from CodeSet
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pattern2[] = {0xE8, 0x13, 0x00, 0x02}; //Call exception dispatcher
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u32 *loadCodeSet = (u32 *)memsearch(pos, pattern, size, sizeof(pattern));
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u8 *temp = memsearch(pos, pattern2, size, sizeof(pattern2));
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if(loadCodeSet == NULL || temp == NULL) error("Failed to get ARM11 exception handlers data.");
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loadCodeSet -= 2;
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*codeSetOffset = *loadCodeSet & 0xFFF;
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return *(u32 *)(temp + 9);
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}
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u32 patchSvcBreak9(u8 *pos, u32 size, u32 kernel9Address)
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{
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//Stub svcBreak with "bkpt 65535" so we can debug the panic
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//Look for the svc handler
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const u8 pattern[] = {0x00, 0xE0, 0x4F, 0xE1}; //mrs lr, spsr
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u32 *arm9SvcTable = (u32 *)memsearch(pos, pattern, size, sizeof(pattern));
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if(arm9SvcTable == NULL) return 1;
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while(*arm9SvcTable != 0) arm9SvcTable++; //Look for SVC0 (NULL)
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u32 *addr = (u32 *)(pos + arm9SvcTable[0x3C] - kernel9Address);
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*addr = 0xE12FFF7F;
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return 0;
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}
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void patchSvcBreak11(u8 *pos, u32 *arm11SvcTable)
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{
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//Same as above, for NATIVE_FIRM ARM11
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u32 *addr = (u32 *)(pos + arm11SvcTable[0x3C] - 0xFFF00000);
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*addr = 0xE12FFF7F;
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}
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u32 patchKernel9Panic(u8 *pos, u32 size)
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{
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const u8 pattern[] = {0xFF, 0xEA, 0x04, 0xD0};
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u8 *temp = memsearch(pos, pattern, size, sizeof(pattern));
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if(temp == NULL) return 1;
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u32 *off = (u32 *)(temp - 0x12);
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*off = 0xE12FFF7E;
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return 0;
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}
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u32 patchKernel11Panic(u8 *pos, u32 size)
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{
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const u8 pattern[] = {0x02, 0x0B, 0x44, 0xE2};
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u32 *off = (u32 *)memsearch(pos, pattern, size, sizeof(pattern));
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if(off == NULL) return 1;
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*off = 0xE12FFF7E;
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return 0;
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}
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u32 patchP9AccessChecks(u8 *pos, u32 size)
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{
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const u8 pattern[] = {0x00, 0x08, 0x49, 0x68};
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u8 *temp = memsearch(pos, pattern, size, sizeof(pattern));
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if(temp == NULL) return 1;
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u16 *off = (u16 *)(temp - 3);
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off[0] = 0x2001; //mov r0, #1
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off[1] = 0x4770; //bx lr
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return 0;
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}
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u32 patchArm11SvcAccessChecks(u32 *arm11SvcHandler, u32 *endPos)
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{
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while(*arm11SvcHandler != 0xE11A0E1B && arm11SvcHandler < endPos) arm11SvcHandler++; //TST R10, R11,LSL LR
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if(arm11SvcHandler == endPos) return 1;
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*arm11SvcHandler = 0xE3B0A001; //MOVS R10, #1
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return 0;
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}
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u32 patchK11ModuleChecks(u8 *pos, u32 size, u8 **freeK11Space, bool patchGames)
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{
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/* We have to detour a function in the ARM11 kernel because builtin modules
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are compressed in memory and are only decompressed at runtime */
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//Check that we have enough free space
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if(*(u32 *)(*freeK11Space + k11modules_bin_size - 4) != 0xFFFFFFFF) return patchGames ? 1 : 0;
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//Look for the code that decompresses the .code section of the builtin modules
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const u8 pattern[] = {0xE5, 0x48, 0x00, 0x9D};
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u8 *temp = memsearch(pos, pattern, size, sizeof(pattern));
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if(temp == NULL) return 1;
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//Inject our code into the free space
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memcpy(*freeK11Space, k11modules_bin, k11modules_bin_size);
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u32 *off = (u32 *)(temp - 0xB);
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//Inject a jump (BL) instruction to our code at the offset we found
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*off = 0xEB000000 | (((((u32)*freeK11Space) - ((u32)off + 8)) >> 2) & 0xFFFFFF);
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*freeK11Space += k11modules_bin_size;
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return 0;
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}
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u32 patchUnitInfoValueSet(u8 *pos, u32 size)
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{
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//Look for UNITINFO value being set during kernel sync
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const u8 pattern[] = {0x01, 0x10, 0xA0, 0x13};
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u8 *off = memsearch(pos, pattern, size, sizeof(pattern));
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if(off == NULL) return 1;
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off[0] = ISDEVUNIT ? 0 : 1;
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off[3] = 0xE3;
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return 0;
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}
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u32 patchLgySignatureChecks(u8 *pos, u32 size)
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{
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const u8 pattern[] = {0x47, 0xC1, 0x17, 0x49};
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u8 *temp = memsearch(pos, pattern, size, sizeof(pattern));
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if(temp == NULL) return 1;
|
|
|
|
u16 *off = (u16 *)(temp + 1);
|
|
off[0] = 0x2000;
|
|
off[1] = 0xB04E;
|
|
off[2] = 0xBD70;
|
|
|
|
return 0;
|
|
}
|
|
|
|
u32 patchTwlInvalidSignatureChecks(u8 *pos, u32 size)
|
|
{
|
|
const u8 pattern[] = {0x20, 0xF6, 0xE7, 0x7F};
|
|
|
|
u8 *temp = memsearch(pos, pattern, size, sizeof(pattern));
|
|
|
|
if(temp == NULL) return 1;
|
|
|
|
u16 *off = (u16 *)(temp - 1);
|
|
*off = 0x2001; //mov r0, #1
|
|
|
|
return 0;
|
|
}
|
|
|
|
u32 patchTwlNintendoLogoChecks(u8 *pos, u32 size)
|
|
{
|
|
const u8 pattern[] = {0xC0, 0x30, 0x06, 0xF0};
|
|
|
|
u16 *off = (u16 *)memsearch(pos, pattern, size, sizeof(pattern));
|
|
|
|
if(off == NULL) return 1;
|
|
|
|
off[1] = 0x2000;
|
|
off[2] = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
u32 patchTwlWhitelistChecks(u8 *pos, u32 size)
|
|
{
|
|
const u8 pattern[] = {0x22, 0x00, 0x20, 0x30};
|
|
|
|
u16 *off = (u16 *)memsearch(pos, pattern, size, sizeof(pattern));
|
|
|
|
if(off == NULL) return 1;
|
|
|
|
off[2] = 0x2000;
|
|
off[3] = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
u32 patchTwlFlashcartChecks(u8 *pos, u32 size, u32 firmVersion)
|
|
{
|
|
const u8 pattern[] = {0x25, 0x20, 0x00, 0x0E};
|
|
|
|
u8 *temp = memsearch(pos, pattern, size, sizeof(pattern));
|
|
|
|
if(temp == NULL)
|
|
{
|
|
if(firmVersion == 0xFFFFFFFF) return patchOldTwlFlashcartChecks(pos, size);
|
|
|
|
return 1;
|
|
}
|
|
|
|
u16 *off = (u16 *)(temp + 3);
|
|
off[0] = off[6] = off[0xC] = 0x2001; //mov r0, #1
|
|
off[1] = off[7] = off[0xD] = 0; //nop
|
|
|
|
return 0;
|
|
}
|
|
|
|
u32 patchOldTwlFlashcartChecks(u8 *pos, u32 size)
|
|
{
|
|
const u8 pattern[] = {0x06, 0xF0, 0xA0, 0xFD};
|
|
|
|
u16 *off = (u16 *)memsearch(pos, pattern, size, sizeof(pattern));
|
|
|
|
if(off == NULL) return 1;
|
|
|
|
off[0] = off[6] = 0x2001; //mov r0, #1
|
|
off[1] = off[7] = 0; //nop
|
|
|
|
return 0;
|
|
}
|
|
|
|
u32 patchTwlShaHashChecks(u8 *pos, u32 size)
|
|
{
|
|
const u8 pattern[] = {0x10, 0xB5, 0x14, 0x22};
|
|
|
|
u16 *off = (u16 *)memsearch(pos, pattern, size, sizeof(pattern));
|
|
|
|
if(off == NULL) return 1;
|
|
|
|
off[0] = 0x2001; //mov r0, #1
|
|
off[1] = 0x4770;
|
|
|
|
return 0;
|
|
}
|
|
|
|
u32 patchAgbBootSplash(u8 *pos, u32 size)
|
|
{
|
|
const u8 pattern[] = {0x00, 0x00, 0x01, 0xEF};
|
|
|
|
u8 *off = memsearch(pos, pattern, size, sizeof(pattern));
|
|
|
|
if(off == NULL) return 1;
|
|
|
|
off[2] = 0x26;
|
|
|
|
return 0;
|
|
} |