281 lines
9.2 KiB
C
281 lines
9.2 KiB
C
/*
|
|
* 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 "patches.h"
|
|
#include "memory.h"
|
|
#include "config.h"
|
|
#include "../build/rebootpatch.h"
|
|
#include "../build/svcGetCFWInfopatch.h"
|
|
#include "fs.h"
|
|
|
|
static u32 *arm11ExceptionsPage = NULL;
|
|
static u32 *arm11SvcTable = NULL;
|
|
static u32 *arm11SvcHandler = NULL;
|
|
|
|
static u8 *freeK11Space = NULL; //other than the one used for svcBackdoor
|
|
|
|
static void findArm11ExceptionsPageAndSvcHandlerAndTable(u8 *pos, u32 size)
|
|
{
|
|
const u8 arm11ExceptionsPagePattern[] = {0x00, 0xB0, 0x9C, 0xE5};
|
|
|
|
if(arm11ExceptionsPage == NULL) arm11ExceptionsPage = (u32 *)memsearch(pos, arm11ExceptionsPagePattern, size, 4) - 0xB;
|
|
if((arm11SvcTable == NULL || arm11SvcHandler == NULL) && arm11ExceptionsPage != NULL)
|
|
{
|
|
u32 svcOffset = (-((arm11ExceptionsPage[2] & 0xFFFFFF) << 2) & (0xFFFFFF << 2)) - 8; //Branch offset + 8 for prefetch
|
|
arm11SvcHandler = arm11SvcTable = (u32 *)(pos + *(u32 *)(pos + 0xFFFF0008 - svcOffset - 0xFFF00000 + 8) - 0xFFF00000); //SVC handler address
|
|
while(*arm11SvcTable) arm11SvcTable++; //Look for SVC0 (NULL)
|
|
}
|
|
}
|
|
|
|
static void findFreeK11Space(u8 *pos, u32 size)
|
|
{
|
|
if(freeK11Space == NULL)
|
|
{
|
|
const u8 bogus_pattern[] = { 0x1E, 0xFF, 0x2F, 0xE1, 0x1E, 0xFF, 0x2F, 0xE1, 0x1E, 0xFF,
|
|
0x2F, 0xE1, 0x00, 0x10, 0xA0, 0xE3, 0x00, 0x10, 0xC0, 0xE5,
|
|
0x1E, 0xFF, 0x2F, 0xE1 };
|
|
|
|
u32 *someSpace = (u32 *)memsearch(pos, bogus_pattern, size, 24);
|
|
|
|
// We couldn't find the place where to begin our search of an empty block
|
|
if (someSpace == NULL)
|
|
return;
|
|
|
|
// Advance until we reach the padding area (filled with 0xFF)
|
|
u32 *freeSpace;
|
|
for(freeSpace = someSpace; *freeSpace != 0xFFFFFFFF; freeSpace++);
|
|
|
|
freeK11Space = (u8 *)freeSpace;
|
|
}
|
|
}
|
|
|
|
u8 *getProcess9(u8 *pos, u32 size, u32 *process9Size, u32 *process9MemAddr)
|
|
{
|
|
u8 *off = memsearch(pos, "ess9", size, 4);
|
|
|
|
*process9Size = *(u32 *)(off - 0x60) * 0x200;
|
|
*process9MemAddr = *(u32 *)(off + 0xC);
|
|
|
|
//Process9 code offset (start of NCCH + ExeFS offset + ExeFS header size)
|
|
return off - 0x204 + (*(u32 *)(off - 0x64) * 0x200) + 0x200;
|
|
}
|
|
|
|
void patchSignatureChecks(u8 *pos, u32 size)
|
|
{
|
|
const u16 sigPatch[2] = {0x2000, 0x4770};
|
|
|
|
//Look for signature checks
|
|
const u8 pattern[] = {0xC0, 0x1C, 0x76, 0xE7},
|
|
pattern2[] = {0xB5, 0x22, 0x4D, 0x0C};
|
|
|
|
u16 *off = (u16 *)memsearch(pos, pattern, size, 4),
|
|
*off2 = (u16 *)(memsearch(pos, pattern2, size, 4) - 1);
|
|
|
|
*off = sigPatch[0];
|
|
off2[0] = sigPatch[0];
|
|
off2[1] = sigPatch[1];
|
|
}
|
|
|
|
void patchFirmlaunches(u8 *pos, u32 size, u32 process9MemAddr)
|
|
{
|
|
//Look for firmlaunch code
|
|
const u8 pattern[] = {0xDE, 0x1F, 0x8D, 0xE2};
|
|
|
|
u8 *off = memsearch(pos, pattern, size, 4) - 0x10;
|
|
|
|
//Firmlaunch function offset - offset in BLX opcode (A4-16 - ARM DDI 0100E) + 1
|
|
u32 fOpenOffset = (u32)(off + 9 - (-((*(u32 *)off & 0x00FFFFFF) << 2) & (0xFFFFFF << 2)) - pos + process9MemAddr);
|
|
|
|
//Copy firmlaunch code
|
|
memcpy(off, reboot, reboot_size);
|
|
|
|
//Put the fOpen offset in the right location
|
|
u32 *pos_fopen = (u32 *)memsearch(off, "OPEN", reboot_size, 4);
|
|
*pos_fopen = fOpenOffset;
|
|
}
|
|
|
|
void patchFirmWrites(u8 *pos, u32 size)
|
|
{
|
|
const u16 writeBlock[2] = {0x2000, 0x46C0};
|
|
|
|
//Look for FIRM writing code
|
|
u8 *const off1 = memsearch(pos, "exe:", size, 4);
|
|
const u8 pattern[] = {0x00, 0x28, 0x01, 0xDA};
|
|
|
|
u16 *off2 = (u16 *)memsearch(off1 - 0x100, pattern, 0x100, 4);
|
|
|
|
off2[0] = writeBlock[0];
|
|
off2[1] = writeBlock[1];
|
|
}
|
|
|
|
void patchFirmWriteSafe(u8 *pos, u32 size)
|
|
{
|
|
const u16 writeBlockSafe[2] = {0x2400, 0xE01D};
|
|
|
|
//Look for FIRM writing code
|
|
const u8 pattern[] = {0x04, 0x1E, 0x1D, 0xDB};
|
|
|
|
u16 *off = (u16 *)memsearch(pos, pattern, size, 4);
|
|
|
|
off[0] = writeBlockSafe[0];
|
|
off[1] = writeBlockSafe[1];
|
|
}
|
|
|
|
void reimplementSvcBackdoor(u8 *pos, u32 size)
|
|
{
|
|
//Official implementation of svcBackdoor
|
|
const u8 svcBackdoor[40] = {0xFF, 0x10, 0xCD, 0xE3, //bic r1, sp, #0xff
|
|
0x0F, 0x1C, 0x81, 0xE3, //orr r1, r1, #0xf00
|
|
0x28, 0x10, 0x81, 0xE2, //add r1, r1, #0x28
|
|
0x00, 0x20, 0x91, 0xE5, //ldr r2, [r1]
|
|
0x00, 0x60, 0x22, 0xE9, //stmdb r2!, {sp, lr}
|
|
0x02, 0xD0, 0xA0, 0xE1, //mov sp, r2
|
|
0x30, 0xFF, 0x2F, 0xE1, //blx r0
|
|
0x03, 0x00, 0xBD, 0xE8, //pop {r0, r1}
|
|
0x00, 0xD0, 0xA0, 0xE1, //mov sp, r0
|
|
0x11, 0xFF, 0x2F, 0xE1}; //bx r1
|
|
|
|
findArm11ExceptionsPageAndSvcHandlerAndTable(pos, size);
|
|
|
|
if(!arm11SvcTable[0x7B])
|
|
{
|
|
u32 *freeSpace;
|
|
for(freeSpace = arm11ExceptionsPage; *freeSpace != 0xFFFFFFFF; freeSpace++);
|
|
|
|
memcpy(freeSpace, svcBackdoor, 40);
|
|
|
|
arm11SvcTable[0x7B] = 0xFFFF0000 + ((u8 *)freeSpace - (u8 *)arm11ExceptionsPage);
|
|
}
|
|
}
|
|
|
|
extern u32 config;
|
|
|
|
void implementSvcGetCFWInfo(u8 *pos, u32 size)
|
|
{
|
|
typedef struct __attribute__((packed))
|
|
{
|
|
char magic[4];
|
|
|
|
u8 versionMajor;
|
|
u8 versionMinor;
|
|
u8 versionBuild;
|
|
u8 flags;
|
|
|
|
u32 commitHash;
|
|
|
|
u32 config;
|
|
} CFWInfo;
|
|
|
|
const char *rev = REVISION;
|
|
bool isRelease = false;
|
|
|
|
findArm11ExceptionsPageAndSvcHandlerAndTable(pos, size);
|
|
findFreeK11Space(pos, size);
|
|
|
|
memcpy(freeK11Space, svcGetCFWInfo, svcGetCFWInfo_size);
|
|
|
|
CFWInfo *info = (CFWInfo *)memsearch(freeK11Space, "LUMA", svcGetCFWInfo_size, 4);
|
|
|
|
info->commitHash = COMMIT_HASH;
|
|
info->config = config;
|
|
info->versionMajor = (u8)(rev[1] - '0');
|
|
info->versionMinor = (u8)(rev[3] - '0');
|
|
if(rev[4] == '.')
|
|
{
|
|
info->versionBuild = (u8)(rev[5] - '0');
|
|
isRelease = rev[6] == 0;
|
|
}
|
|
else
|
|
isRelease = rev[4] == 0;
|
|
|
|
info->flags = 0 /* master branch */ | (((isRelease) ? 1 : 0) << 1) /* is release */;
|
|
|
|
arm11SvcTable[0x2E] = 0xFFF00000 + freeK11Space - pos; //stubbed svc
|
|
freeK11Space += svcGetCFWInfo_size;
|
|
}
|
|
|
|
void patchTitleInstallMinVersionCheck(u8 *pos, u32 size)
|
|
{
|
|
const u8 pattern[] = {0x0A, 0x81, 0x42, 0x02};
|
|
|
|
u8 *off = memsearch(pos, pattern, size, 4);
|
|
|
|
if(off != NULL) off[4] = 0xE0;
|
|
}
|
|
|
|
void applyLegacyFirmPatches(u8 *pos, FirmwareType firmType)
|
|
{
|
|
const patchData twlPatches[] = {
|
|
{{0x1650C0, 0x165D64}, {{ 6, 0x00, 0x20, 0x4E, 0xB0, 0x70, 0xBD }}, 0},
|
|
{{0x173A0E, 0x17474A}, { .type1 = 0x2001 }, 1},
|
|
{{0x174802, 0x17553E}, { .type1 = 0x2000 }, 2},
|
|
{{0x174964, 0x1756A0}, { .type1 = 0x2000 }, 2},
|
|
{{0x174D52, 0x175A8E}, { .type1 = 0x2001 }, 2},
|
|
{{0x174D5E, 0x175A9A}, { .type1 = 0x2001 }, 2},
|
|
{{0x174D6A, 0x175AA6}, { .type1 = 0x2001 }, 2},
|
|
{{0x174E56, 0x175B92}, { .type1 = 0x2001 }, 1},
|
|
{{0x174E58, 0x175B94}, { .type1 = 0x4770 }, 1}
|
|
},
|
|
agbPatches[] = {
|
|
{{0x9D2A8, 0x9DF64}, {{ 6, 0x00, 0x20, 0x4E, 0xB0, 0x70, 0xBD }}, 0},
|
|
{{0xD7A12, 0xD8B8A}, { .type1 = 0xEF26 }, 1}
|
|
};
|
|
|
|
/* Calculate the amount of patches to apply. Only count the boot screen patch for AGB_FIRM
|
|
if the matching option was enabled (keep it as last) */
|
|
u32 numPatches = firmType == TWL_FIRM ? (sizeof(twlPatches) / sizeof(patchData)) :
|
|
(sizeof(agbPatches) / sizeof(patchData) - !CONFIG(5));
|
|
const patchData *patches = firmType == TWL_FIRM ? twlPatches : agbPatches;
|
|
|
|
//Patch
|
|
for(u32 i = 0; i < numPatches; i++)
|
|
{
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
|
|
u32 getLoader(u8 *pos, u32 *loaderSize)
|
|
{
|
|
u8 *off = pos;
|
|
u32 size;
|
|
|
|
while(true)
|
|
{
|
|
size = *(u32 *)(off + 0x104) * 0x200;
|
|
if(*(u32 *)(off + 0x200) == 0x64616F6C) break;
|
|
off += size;
|
|
}
|
|
|
|
*loaderSize = size;
|
|
|
|
return (u32)(off - pos);
|
|
} |