From 93bf62580a68533dc8252b9a2a055c02f34ecb67 Mon Sep 17 00:00:00 2001
From: Christian Cunningham <cc@localhost>
Date: Thu, 24 Mar 2022 09:38:08 -0700
Subject: Modularized

---
 kernel/exceptions/data.S | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 kernel/exceptions/data.S

(limited to 'kernel/exceptions/data.S')

diff --git a/kernel/exceptions/data.S b/kernel/exceptions/data.S
new file mode 100644
index 0000000..fe33215
--- /dev/null
+++ b/kernel/exceptions/data.S
@@ -0,0 +1,29 @@
+.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
-- 
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