From: Olof Johansson <olof@lixom.net>
Date: Sun, 6 Nov 2005 22:54:36 +0000 (-0800)
Subject: [PATCH] powerpc: Nicer printing of address at oops
X-Git-Tag: v2.6.15-rc1~421^2~23
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=723925b7b138cecb29d76169d20149255d354a7a;p=linux-2.6

[PATCH] powerpc: Nicer printing of address at oops

Add nicer printing of faulting address on unresolvable kernel faults.

Makes life a little easier for those who don't know how to decode our
register contents at oops time.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---

diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index 841d8b6323..93d4fbfdb7 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -389,5 +389,22 @@ void bad_page_fault(struct pt_regs *regs, unsigned long address, int sig)
 	}
 
 	/* kernel has accessed a bad area */
+
+	printk(KERN_ALERT "Unable to handle kernel paging request for ");
+	switch (regs->trap) {
+		case 0x300:
+		case 0x380:
+			printk("data at address 0x%08lx\n", regs->dar);
+			break;
+		case 0x400:
+		case 0x480:
+			printk("instruction fetch\n");
+			break;
+		default:
+			printk("unknown fault\n");
+	}
+	printk(KERN_ALERT "Faulting instruction address: 0x%08lx\n",
+		regs->nip);
+
 	die("Kernel access of bad area", regs, sig);
 }