603 lines
16 KiB
C
603 lines
16 KiB
C
/*
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* This file is part of Luma3DS
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* Copyright (C) 2016-2017 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 and 7.c of GPLv3 apply to this file:
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* * Requiring preservation of specified reasonable legal notices or
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* author attributions in that material or in the Appropriate Legal
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* Notices displayed by works containing it.
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* * Prohibiting misrepresentation of the origin of that material,
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* or requiring that modified versions of such material be marked in
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* reasonable ways as different from the original version.
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*/
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/*
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* Signature patches by an unknown author
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* Signature patches for old FIRMs by SciresM
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* firmlaunches patching code originally by delebile
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* FIRM partition writes patches by delebile
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* Idea for svcBreak patches from yellows8 and others on #3dsdev
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* TWL_FIRM patches by Steveice10 and others
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*/
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#include "patches.h"
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#include "fs.h"
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#include "exceptions.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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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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static const u8 pattern[] = {0x00, 0xB0, 0x9C, 0xE5};
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*arm11ExceptionsPage = (u32 *)memsearch(pos, pattern, size, sizeof(pattern));
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if(*arm11ExceptionsPage == 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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u32 *freeSpace;
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for(freeSpace = *arm11ExceptionsPage; freeSpace < *arm11ExceptionsPage + 0x400 && *freeSpace != 0xFFFFFFFF; freeSpace++);
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*freeK11Space = (u8 *) freeSpace;
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return arm11SvcTable;
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}
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void installMMUHook(u8 *pos, u32 size, u8 **freeK11Space)
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{
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static const u8 pattern[] = {0x0E, 0x32, 0xA0, 0xE3, 0x02, 0xC2, 0xA0, 0xE3};
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u32 *off = (u32 *)memsearch(pos, pattern, size, 8);
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memcpy(*freeK11Space, mmuHook_bin, mmuHook_bin_size);
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*off = MAKE_BRANCH_LINK(off, *freeK11Space);
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(*freeK11Space) += mmuHook_bin_size;
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}
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void installK11MainHook(u8 *pos, u32 size, bool isSafeMode, u32 baseK11VA, u32 *arm11SvcTable, u32 *arm11ExceptionsPage, u8 **freeK11Space)
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{
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//The parameters to be passed on to the kernel ext
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//Please keep that in sync with the definition in kernel_extension_setup.c and kernel_extension/main.c
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struct KExtParameters
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{
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void (*SGI0HandlerCallback)(struct KExtParameters *, u32 *);
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void *interruptManager;
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u32 *L2MMUTable; //bit31 mapping
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void (*initFPU)(void);
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void (*mcuReboot)(void);
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void (*coreBarrier)(void);
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u32 TTBCR;
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u32 L1MMUTableAddrs[4];
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u32 kernelVersion;
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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;
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};
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static const u8 pattern[] = {0x00, 0x00, 0xA0, 0xE1, 0x03, 0xF0, 0x20, 0xE3, 0xFD, 0xFF, 0xFF, 0xEA};
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u32 *off = (u32 *)memsearch(pos, pattern, size, 12);
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//look for cpsie i and place our function call in the nop 2 instructions before
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while(*off != 0xF1080080) off--;
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off -= 2;
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memcpy(*freeK11Space, k11MainHook_bin, k11MainHook_bin_size);
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u32 relocBase = 0xFFFF0000 + (*freeK11Space - (u8 *)arm11ExceptionsPage);
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*off = MAKE_BRANCH_LINK(baseK11VA + ((u8 *)off - pos), relocBase);
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off = (u32 *)(pos + (arm11SvcTable[0x50] - baseK11VA)); //svcBindInterrupt
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while(off[0] != 0xE1A05000 || off[1] != 0xE2100102 || off[2] != 0x5A00000B) off++;
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off--;
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signed int offset = (*off & 0xFFFFFF) << 2;
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offset = offset << 6 >> 6; //sign extend
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offset += 8;
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u32 InterruptManager_MapInterrupt = baseK11VA + ((u8 *)off - pos) + offset;
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u32 interruptManager = *(u32 *)(off - 4 + (*(off - 6) & 0xFFF) / 4);
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off = (u32 *)memsearch(*freeK11Space, "bind", k11MainHook_bin_size, 4);
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off[0] = InterruptManager_MapInterrupt;
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//Relocate stuff
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off[1] += relocBase;
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off[2] += relocBase;
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struct KExtParameters *p = (struct KExtParameters *)(off + 3);
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memset(p, 0, sizeof(struct KExtParameters));
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memcpy((void *)&p->SGI0HandlerCallback, "hdlr", 4);
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p->interruptManager = (void *)interruptManager;
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struct CfwInfo *info = &p->info;
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memcpy(&info->magic, "LUMA", 4);
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info->commitHash = COMMIT_HASH;
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info->config = configData.config;
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info->versionMajor = VERSION_MAJOR;
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info->versionMinor = VERSION_MINOR;
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info->versionBuild = VERSION_BUILD;
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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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if(isSdMode) info->flags |= 1 << 6;
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(*freeK11Space) += (k11MainHook_bin_size + sizeof(struct KExtParameters));
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(*freeK11Space) += 4 - ((u32)(*freeK11Space) % 4);
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}
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void installSvcConnectToPortInitHook(u32 *arm11SvcTable, u32 *arm11ExceptionsPage, u8 **freeK11Space)
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{
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u32 addr = 0xFFFF0000 + (u32)*freeK11Space - (u32)arm11ExceptionsPage;
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u32 svcSleepThreadAddr = arm11SvcTable[0x0A], svcConnectToPortAddr = arm11SvcTable[0x2D];
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arm11SvcTable[0x2D] = addr;
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memcpy(*freeK11Space, svcConnectToPortInitHook_bin, svcConnectToPortInitHook_bin_size);
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u32 *off = (u32 *)(*freeK11Space);
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off[1] = svcConnectToPortAddr;
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off[2] = svcSleepThreadAddr;
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(*freeK11Space) += svcConnectToPortInitHook_bin_size;
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}
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void installSvcCustomBackdoor(u32 *arm11SvcTable, u8 **freeK11Space, u32 *arm11ExceptionsPage)
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{
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memcpy(*freeK11Space, svcCustomBackdoor_bin, svcCustomBackdoor_bin_size);
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*((u32 *)*freeK11Space + 1) = arm11SvcTable[0x2F]; // temporary location
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arm11SvcTable[0x2F] = 0xFFFF0000 + *freeK11Space - (u8 *)arm11ExceptionsPage;
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(*freeK11Space) += svcCustomBackdoor_bin_size;
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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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static 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 patchOldSignatureChecks(u8 *pos, u32 size)
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{
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// Look for signature checks
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static const u8 pattern[] = {0xC0, 0x1C, 0xBD, 0xE7},
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pattern2[] = {0xB5, 0x23, 0x4E, 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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static const u8 pattern[] = {0xE2, 0x20, 0x20, 0x90};
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u32 pathLen;
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for(pathLen = 0; pathLen < 41 && launchedPath[pathLen] != 0; pathLen++);
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if(launchedPath[pathLen] != 0) return 1;
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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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u16 *fname = (u16 *)memsearch(off, "FILE", reboot_bin_size, 8);
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memcpy(fname, launchedPath, 2 * (1 + pathLen));
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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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static 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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static 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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static 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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static 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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static 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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static 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 patchK11ModuleLoading(u32 section0size, u32 modulesSize, u8 *pos, u32 size)
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{
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static const u8 moduleLoadingPattern[] = {0xE2, 0x05, 0x00, 0x57},
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modulePidPattern[] = {0x06, 0xA0, 0xE1, 0xF2}; //GetSystemInfo
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u8 *off = memsearch(pos, moduleLoadingPattern, size, 4);
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if(off == NULL) return 1;
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off[1]++;
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u32 *off32;
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for(off32 = (u32 *)(off - 3); *off32 != 0xE59F0000; off32++);
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off32 += 2;
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off32[1] = off32[0] + modulesSize;
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for(; *off32 != section0size; off32++);
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*off32 += ((modulesSize + 0x1FF) >> 9) << 9;
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off = memsearch(pos, modulePidPattern, size, 4);
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if(off == NULL) return 1;
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off[0xB] = 6;
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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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static 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 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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static 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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u32 patchKernel9Panic(u8 *pos, u32 size)
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{
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static 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 patchP9AccessChecks(u8 *pos, u32 size)
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{
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static 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 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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static const u8 pattern[] = {0x01, 0x10, 0xA0, 0x13};
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u8 *off = memsearch(pos, pattern, size, sizeof(pattern));
|
|
|
|
if(off == NULL) return 1;
|
|
|
|
off[0] = ISDEVUNIT ? 0 : 1;
|
|
off[3] = 0xE3;
|
|
|
|
return 0;
|
|
}
|
|
|
|
u32 patchLgySignatureChecks(u8 *pos, u32 size)
|
|
{
|
|
static const u8 pattern[] = {0x47, 0xC1, 0x17, 0x49};
|
|
|
|
u8 *temp = memsearch(pos, pattern, size, sizeof(pattern));
|
|
|
|
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)
|
|
{
|
|
static 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)
|
|
{
|
|
static 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)
|
|
{
|
|
static 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)
|
|
{
|
|
static 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)
|
|
{
|
|
static 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)
|
|
{
|
|
static 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)
|
|
{
|
|
static 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;
|
|
}
|