LowLevel/Luma3DS-3GX
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Minor stuff

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This commit is contained in:
Aurora 2016-11-09 22:52:29 +01:00
parent b830909504
commit c1f85650bd
1 changed files with 46 additions and 40 deletions
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86
injector/source/patcher.c
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@ -240,21 +240,24 @@ static inline u8 *getCfgOffsets(u8 *code, u32 size, u32 *CFGUHandleOffset)
}
}
for(u8 *CFGU_GetConfigInfoBlk2_endPos = code; CFGU_GetConfigInfoBlk2_endPos < code + size - 8; CFGU_GetConfigInfoBlk2_endPos += 4)
if(n > 0)
{
static const u32 CFGU_GetConfigInfoBlk2_endPattern[] = {0xE8BD8010, 0x00010082};
//There might be multiple implementations of GetConfigInfoBlk2 but let's search for the one we want
u32 *cmp = (u32 *)CFGU_GetConfigInfoBlk2_endPos;
if(cmp[0] == CFGU_GetConfigInfoBlk2_endPattern[0] && cmp[1] == CFGU_GetConfigInfoBlk2_endPattern[1])
for(u8 *CFGU_GetConfigInfoBlk2_endPos = code; CFGU_GetConfigInfoBlk2_endPos < code + size - 8; CFGU_GetConfigInfoBlk2_endPos += 4)
{
*CFGUHandleOffset = *((u32 *)CFGU_GetConfigInfoBlk2_endPos + 2);
static const u32 CFGU_GetConfigInfoBlk2_endPattern[] = {0xE8BD8010, 0x00010082};
for(u32 i = 0; i < n; i++)
if(possible[i] == *CFGUHandleOffset) return CFGU_GetConfigInfoBlk2_endPos;
//There might be multiple implementations of GetConfigInfoBlk2 but let's search for the one we want
u32 *cmp = (u32 *)CFGU_GetConfigInfoBlk2_endPos;
CFGU_GetConfigInfoBlk2_endPos += 4;
if(cmp[0] == CFGU_GetConfigInfoBlk2_endPattern[0] && cmp[1] == CFGU_GetConfigInfoBlk2_endPattern[1])
{
*CFGUHandleOffset = *((u32 *)CFGU_GetConfigInfoBlk2_endPos + 2);
for(u32 i = 0; i < n; i++)
if(possible[i] == *CFGUHandleOffset) return CFGU_GetConfigInfoBlk2_endPos;
CFGU_GetConfigInfoBlk2_endPos += 4;
}
}
}
@ -267,41 +270,44 @@ static inline u32 patchCfgGetLanguage(u8 *code, u32 size, u8 languageId, u8 *CFG
for(CFGU_GetConfigInfoBlk2_startPos = CFGU_GetConfigInfoBlk2_endPos - 4;
CFGU_GetConfigInfoBlk2_startPos >= code && *((u16 *)CFGU_GetConfigInfoBlk2_startPos + 1) != 0xE92D;
CFGU_GetConfigInfoBlk2_startPos -= 2);
CFGU_GetConfigInfoBlk2_startPos -= 4);
for(u8 *languageBlkIdPos = code; languageBlkIdPos < code + size; languageBlkIdPos += 4)
if(CFGU_GetConfigInfoBlk2_startPos >= code)
{
if(*(u32 *)languageBlkIdPos == 0xA0002)
for(u8 *languageBlkIdPos = code; languageBlkIdPos < code + size; languageBlkIdPos += 4)
{
for(u8 *instr = languageBlkIdPos - 8; instr >= languageBlkIdPos - 0x1008 && instr >= code + 4; instr -= 4) //Should be enough
if(*(u32 *)languageBlkIdPos == 0xA0002)
{
if(instr[3] == 0xEB) //We're looking for BL
for(u8 *instr = languageBlkIdPos - 8; instr >= languageBlkIdPos - 0x1008 && instr >= code + 4; instr -= 4) //Should be enough
{
u8 *calledFunction = instr;
u32 i = 0;
bool found;
do
if(instr[3] == 0xEB) //We're looking for BL
{
u32 low24 = (*(u32 *)calledFunction & 0x00FFFFFF) << 2;
u32 signMask = (u32)(-(low24 >> 25)) & 0xFC000000; //Sign extension
s32 offset = (s32)(low24 | signMask) + 8; //Branch offset + 8 for prefetch
u8 *calledFunction = instr;
u32 i = 0;
bool found;
calledFunction += offset;
do
{
u32 low24 = (*(u32 *)calledFunction & 0x00FFFFFF) << 2;
u32 signMask = (u32)(-(low24 >> 25)) & 0xFC000000; //Sign extension
s32 offset = (s32)(low24 | signMask) + 8; //Branch offset + 8 for prefetch
found = calledFunction >= CFGU_GetConfigInfoBlk2_startPos - 4 && calledFunction <= CFGU_GetConfigInfoBlk2_endPos;
i++;
}
while(i < 2 && !found && calledFunction[3] == 0xEA);
calledFunction += offset;
if(found)
{
*((u32 *)instr - 1) = 0xE3A00000 | languageId; //mov r0, sp => mov r0, =languageId
*(u32 *)instr = 0xE5CD0000; //bl CFGU_GetConfigInfoBlk2 => strb r0, [sp]
*((u32 *)instr + 1) = 0xE3B00000; //(1 or 2 instructions) => movs r0, 0 (result code)
found = calledFunction >= CFGU_GetConfigInfoBlk2_startPos - 4 && calledFunction <= CFGU_GetConfigInfoBlk2_endPos;
i++;
}
while(i < 2 && !found && calledFunction[3] == 0xEA);
//We're done
return 0;
if(found)
{
*((u32 *)instr - 1) = 0xE3A00000 | languageId; //mov r0, sp => mov r0, =languageId
*(u32 *)instr = 0xE5CD0000; //bl CFGU_GetConfigInfoBlk2 => strb r0, [sp]
*((u32 *)instr + 1) = 0xE3B00000; //(1 or 2 instructions) => movs r0, 0 (result code)
//We're done
return 0;
}
}
}
}
@ -321,14 +327,14 @@ static inline u32 patchCfgGetRegion(u8 *code, u32 size, u8 regionId, u32 CFGUHan
if(*cmp == cfgSecureInfoGetRegionCmdPattern[1])
{
for(u32 i = 1; i < 4; i++)
for(u32 i = 1; i < 3; i++)
if((*(cmp - i) & 0xFFFF0FFF) == cfgSecureInfoGetRegionCmdPattern[0] && *((u16 *)cmdPos + 5) == 0xE59F &&
*(u32 *)(cmdPos + 16 + *((u16 *)cmdPos + 4)) == CFGUHandleOffset)
{
cmp[3] = 0xE3A00000 | regionId; //mov r0, =regionId
cmp[4] = 0xE5C40008; //strb r0, [r4, 8]
cmp[5] = 0xE3B00000; //movs r0, 0 (result code) ('s' not needed but nvm)
cmp[6] = 0xE5840004; //str r0, [r4, 4]
cmp[4] = 0xE5C40008; //strb r0, [r4, #8]
cmp[5] = 0xE3A00000; //mov r0, #0 (result code)
cmp[6] = 0xE5840004; //str r0, [r4, #4]
//The remaining, not patched, function code will do the rest for us
return 0;