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Diffstat (limited to 'arch/parisc/kernel/unaligned.c')
-rw-r--r--arch/parisc/kernel/unaligned.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/arch/parisc/kernel/unaligned.c b/arch/parisc/kernel/unaligned.c
index d7c0acb35ec2..2b65c0177778 100644
--- a/arch/parisc/kernel/unaligned.c
+++ b/arch/parisc/kernel/unaligned.c
@@ -28,6 +28,7 @@
#include <linux/ratelimit.h>
#include <asm/uaccess.h>
#include <asm/hardirq.h>
+#include <asm/traps.h>
/* #define DEBUG_UNALIGNED 1 */
@@ -130,8 +131,6 @@
int unaligned_enabled __read_mostly = 1;
-void die_if_kernel (char *str, struct pt_regs *regs, long err);
-
static int emulate_ldh(struct pt_regs *regs, int toreg)
{
unsigned long saddr = regs->ior;
@@ -666,7 +665,7 @@ void handle_unaligned(struct pt_regs *regs)
break;
}
- if (modify && R1(regs->iir))
+ if (ret == 0 && modify && R1(regs->iir))
regs->gr[R1(regs->iir)] = newbase;
@@ -677,6 +676,14 @@ void handle_unaligned(struct pt_regs *regs)
if (ret)
{
+ /*
+ * The unaligned handler failed.
+ * If we were called by __get_user() or __put_user() jump
+ * to it's exception fixup handler instead of crashing.
+ */
+ if (!user_mode(regs) && fixup_exception(regs))
+ return;
+
printk(KERN_CRIT "Unaligned handler failed, ret = %d\n", ret);
die_if_kernel("Unaligned data reference", regs, 28);