aboutsummaryrefslogtreecommitdiff
path: root/src/exceptions/data.S
blob: fe33215b2c8c6bb627fca105fdf4787c682f121a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
.section ".text.exceptions"
.globl data
data:
	cpsid aif
	stmfd sp!, {r0-r12,lr}
	ldr r4, [lr, #-4]
	// Output return address
	mov r0, #80
	mov r1, #0
	mov r2, r4
	sub r2, #8
	bl draw_hex32
	// Output the data at the address
	mov r0, #80
	mov r1, #1
	ldr r2, [r4, #-8]
	bl draw_hex32
	// Output the Program Status
	mov r0, #80
	mov r1, #2
	mrs r2, spsr
	bl draw_hex32
	// Output the data-fault register
	mov r0, #80
	mov r1, #3
	mrc p15, 0, r2, c5, c0, 0 //// https://developer.arm.com/documentation/ddi0464/d/System-Control/Register-descriptions/Data-Fault-Status-Register?lang=en
	bl draw_hex32
	ldmfd sp!, {r0-r12,lr}
	subs pc, lr, #4 // Should be 8 once I can actually handle the abort