LowLevel/Luma3DS-3GX
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Minor pedantic changes (3)

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This commit is contained in:
Aurora 2016-05-12 14:48:52 +02:00
parent 76acfd9934
commit 8cbc535755
4 changed files with 18 additions and 20 deletions
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6
source/emunand.c
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@ -48,13 +48,13 @@ u32 getSDMMC(u8 *pos, u32 size)
return *(u32 *)(off + 9) + *(u32 *)(off + 0xD);
}
void getEmuRW(u8 *pos, u32 size, u32 *readOffset, u32 *writeOffset)
void getEmuRW(u8 *pos, u32 size, u16 **readOffset, u16 **writeOffset)
{
//Look for read/write code
const u8 pattern[] = {0x1E, 0x00, 0xC8, 0x05};
*readOffset = (u32)memsearch(pos, pattern, size, 4) - 6;
*writeOffset = (u32)memsearch((u8 *)(*readOffset + 0xA), pattern, 0x100, 4) - 6;
*readOffset = (u16 *)memsearch(pos, pattern, size, 4) - 3;
*writeOffset = (u16 *)memsearch((u8 *)(*readOffset + 5), pattern, 0x100, 4) - 3;
}
u32 *getMPU(u8 *pos, u32 size)

2
source/emunand.h
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@ -10,6 +10,6 @@
void getEmunandSect(u32 *off, u32 *head, u32 *emuNAND);
u32 getSDMMC(u8 *pos, u32 size);
void getEmuRW(u8 *pos, u32 size, u32 *readOffset, u32 *writeOffset);
void getEmuRW(u8 *pos, u32 size, u16 **readOffset, u16 **writeOffset);
u32 *getMPU(u8 *pos, u32 size);
void *getEmuCode(u8 *pos);

28
source/firm.c
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@ -332,29 +332,27 @@ static inline void patchEmuNAND(u8 *arm9Section, u8 *process9Offset, u32 process
section[2].offset + (u32)section[2].address;
//Add emuNAND hooks
u32 emuRead,
emuWrite;
u16 *emuRead,
*emuWrite;
getEmuRW(process9Offset, process9Size, &emuRead, &emuWrite);
*(u16 *)emuRead = nandRedir[0];
*((u16 *)emuRead + 1) = nandRedir[1];
*((u32 *)emuRead + 1) = branchOffset;
*(u16 *)emuWrite = nandRedir[0];
*((u16 *)emuWrite + 1) = nandRedir[1];
*((u32 *)emuWrite + 1) = branchOffset;
*emuRead = nandRedir[0];
emuRead[1] = nandRedir[1];
((u32 *)emuRead)[1] = branchOffset;
*emuWrite = nandRedir[0];
emuWrite[1] = nandRedir[1];
((u32 *)emuWrite)[1] = branchOffset;
//Set MPU for emu code region
u32 *mpuOffset = getMPU(arm9Section, section[2].size);
*mpuOffset = mpuPatch[0];
*(mpuOffset + 6) = mpuPatch[1];
*(mpuOffset + 9) = mpuPatch[2];
mpuOffset[6] = mpuPatch[1];
mpuOffset[9] = mpuPatch[2];
}
static inline void patchReboots(u8 *process9Offset, u32 process9Size, u32 process9MemAddr)
{
//Calculate offset for the firmlaunch code and fOpen
u32 fOpenOffset;
//Calculate offset for the firmlaunch code
void *rebootOffset = getReboot(process9Offset, process9Size, process9MemAddr, &fOpenOffset);
//Copy firmlaunch code
@ -370,7 +368,6 @@ static inline void reimplementSvcBackdoor(void)
u8 *arm11Section1 = (u8 *)firm + section[1].offset;
u32 *exceptionsPage;
u32 *svcTable = getSvcAndExceptions(arm11Section1, section[1].size, &exceptionsPage);
if(!svcTable[0x7B])
@ -381,13 +378,14 @@ static inline void reimplementSvcBackdoor(void)
memcpy(freeSpace, svcBackdoor, 40);
svcTable[0x7B] = 0xFFFF0000 + (u32)((u8 *)freeSpace - (u8 *)exceptionsPage);
svcTable[0x7B] = 0xFFFF0000 + ((u8 *)freeSpace - (u8 *)exceptionsPage);
}
}
static inline void copySection0AndInjectLoader(void)
{
u8 *arm11Section0 = (u8 *)firm + section[0].offset;
u32 loaderSize;
u32 loaderOffset = getLoader(arm11Section0, &loaderSize);

2
source/patches.c
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@ -104,7 +104,7 @@ u32 *getSvcAndExceptions(u8 *pos, u32 size, u32 **exceptionsPage)
{
const u8 pattern[] = {0x00, 0xB0, 0x9C, 0xE5}; //cpsid aif
*exceptionsPage = (u32 *)(memsearch(pos, pattern, size, 4) - 0x2C);
*exceptionsPage = (u32 *)memsearch(pos, pattern, size, 4) - 0xB;
u32 svcOffset = (-(((*exceptionsPage)[2] & 0xFFFFFF) << 2) & (0xFFFFFF << 2)) - 8; //Branch offset + 8 for prefetch
u32 *svcTable = (u32 *)(pos + *(u32 *)(pos + 0xFFFF0008 - svcOffset - 0xFFF00000 + 8) - 0xFFF00000); //SVC handler address