From d00d82ac8972dfe1de60ba7aae978c83031d8c90 Mon Sep 17 00:00:00 2001 From: TuxSH Date: Tue, 10 May 2016 23:27:54 +0200 Subject: [PATCH] Update firm.c --- source/firm.c | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) diff --git a/source/firm.c b/source/firm.c index b77877d..0994591 100755 --- a/source/firm.c +++ b/source/firm.c @@ -378,16 +378,16 @@ static inline void reimplementSvcBackdoor(u8 *arm11Section1) if(freeSpace >= exceptionsPage + 0x400) return; //Official implementation of svcBackdoor - freeSpace[0] = 0xE3CD10FF; - freeSpace[1] = 0xE3811C0F; - freeSpace[2] = 0xE2811028; - freeSpace[3] = 0xE5912000; - freeSpace[4] = 0xE9226000; - freeSpace[5] = 0xE1A0D002; - freeSpace[6] = 0xE12FFF30; - freeSpace[7] = 0xE8BD0003; - freeSpace[8] = 0xE1A0D000; - freeSpace[9] = 0xE12FFF11; + freeSpace[0] = 0xE3CD10FF; //bic r1, sp, #0xff + freeSpace[1] = 0xE3811C0F; //orr r1, r1, #0xf00 + freeSpace[2] = 0xE2811028; //add r1, r1, #0x28 + freeSpace[3] = 0xE5912000; //ldr r2, [r1] + freeSpace[4] = 0xE9226000; //stmdb r2!, {sp, lr} + freeSpace[5] = 0xE1A0D002; //mov sp, r2 + freeSpace[6] = 0xE12FFF30; //blx r0 + freeSpace[7] = 0xE8BD0003; //pop {r0, r1} + freeSpace[8] = 0xE1A0D000; //mov sp, r0 + freeSpace[9] = 0xE12FFF11; //bx r1 svcTable[0x7B] = 0xFFFF0000 + ((u8 *)freeSpace - (u8 *) exceptionsPage); } @@ -505,4 +505,4 @@ static inline void launchFirm(u32 firstSectionToCopy, u32 bootType) //Final jump to ARM9 kernel ((void (*)())firm->arm9Entry)(); -} \ No newline at end of file +}