freemyipod r701 - Code Review

Repository:	freemyipod
Revision:	< r700‎ \| r701 \| r702 >
Date:	22:06, 23 April 2011
Author:	theseven
Status:	new
Tags:
Comment:	emCORE: Protect IRQ vectors (privileged mode: read only, user mode: no access) to catch null pointer dereferences
Modified paths:	/emcore/trunk/target/ipodclassic/crt0.S (modified) (history) /emcore/trunk/target/ipodnano3g/crt0.S (modified) (history)

Diff [purge]

Index: emcore/trunk/target/ipodnano3g/crt0.S
—	—	@@ -41,10 +41,16 @@
42	42	.section .initcode,"ax",%progbits
43	43	.global _start
44	44	_start:
	45	+ mrc p15, 0, r0,c1,c0
	46	+ bic r0, r0, #0x200
	47	+ orr r0, r0, #0x100
	48	+ mcr p15, 0, r0,c1,c0
	49	+ mov r0, #0x7fffffff
	50	+ mcr p15, 0, r0,c3,c0
45	51	mov r0, #0x22000000
46		~~- orr r1, r0, #0x00000c00~~
	52	+ orr r1, r0, #0x00000100
47	53	orr r0, r0, #0x0003c000
48		~~- orr r1, r1, #0x0000001e~~
	54	+ orr r1, r1, #0x000000fe
49	55	add r2, r0, #0x200
50	56	mov r3, #0
51	57	str r1, [r0], #4
Index: emcore/trunk/target/ipodclassic/crt0.S
—	—	@@ -41,10 +41,16 @@
42	42	.section .initcode,"ax",%progbits
43	43	.global _start
44	44	_start:
	45	+ mrc p15, 0, r0,c1,c0
	46	+ bic r0, r0, #0x200
	47	+ orr r0, r0, #0x100
	48	+ mcr p15, 0, r0,c1,c0
	49	+ mov r0, #0x7fffffff
	50	+ mcr p15, 0, r0,c3,c0
45	51	mov r0, #0x22000000
46		~~- orr r1, r0, #0x00000c00~~
	52	+ orr r1, r0, #0x00000100
47	53	orr r0, r0, #0x0003c000
48		~~- orr r1, r1, #0x0000001e~~
	54	+ orr r1, r1, #0x000000fe
49	55	add r2, r0, #0x200
50	56	mov r3, #0
51	57	str r1, [r0], #4