LowLevel/Luma3DS-3GX
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Fix developer-branch-exclusive patches

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This commit is contained in:
TuxSH 2016-05-27 22:06:11 +02:00
parent f85bbfff58
commit 6a280723f8
2 changed files with 20 additions and 7 deletions
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7
source/firm.c
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@ -212,7 +212,12 @@ void main(void)
loadFirm(firmType, !firmType && updatedSys == !firmSource);
patchExceptionHandlersInstall((u8 *)firm + section[2].offset, section[2].size);
if(DEVMODE)
{
u32 arm9SectionNum = 0;
for(; (u32)(section[arm9SectionNum].address) >> 24 != 0x08 && arm9SectionNum < 4; arm9SectionNum++);
patchExceptionHandlersInstall((u8 *)firm + section[arm9SectionNum].offset, section[arm9SectionNum].size);
}
switch(firmType)
{

20
source/patches.c
View File

@ -81,9 +81,16 @@ void patchFirmWriteSafe(u8 *pos, u32 size)
void patchExceptionHandlersInstall(u8 *pos, u32 size)
{
const u8 pattern[] = {0x50, 0x50, 0x9F, 0xE5};
u32 *off = (u32 *)memsearch(pos, pattern, size, 4) - 1;
const u8 pattern[] = {
0x18, 0x10, 0x80, 0xE5,
0x10, 0x10, 0x80, 0xE5,
0x20, 0x10, 0x80, 0xE5,
0x28, 0x10, 0x80, 0xE5,
}; //i.e when it stores ldr pc, [pc, #-4]
u32* off = (u32 *)(memsearch(pos, pattern, size, sizeof(pattern)));
if(off == NULL) return;
off += sizeof(pattern)/4;
u32 r0 = 0x08000000;
@ -121,11 +128,12 @@ void patchUnitInfoValueSet(u8 *pos, u32 size)
void patchKernelFCRAMAndVRAMMappingPermissions(u8 *pos, u32 size)
{
//Look for MMU config
const u8 pattern[] = {0xC4, 0xDD, 0xFA, 0x1F};
const u8 pattern[] = {0x97, 0x05, 0x00, 0x00, 0x15, 0xE4, 0x00, 0x00};
u32* off = (u32 *)memsearch(pos, pattern, size, 4);
u32 *off = (u32 *)memsearch(pos, pattern, size, 8);
while(off != NULL && *off != 0x16416) off--;
if(off != NULL) off[1] &= ~(1 << 4); //Clear XN bit
if(off != NULL) *off &= ~(1 << 4); //Clear XN bit
}
void reimplementSvcBackdoor(u8 *pos, u32 size)