Blackfin arch: Better error handling of unknown exceptions

Better error handling of unknown exceptions, allows userspace to do a
EXCPT n instruction for a not installed exception handler, and the
kernel doesn't crash (like it use to before this).

Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/arch/blackfin/include/asm/traps.h b/arch/blackfin/include/asm/traps.h
index f0e5f940d9ca..34f7295fb070 100644
--- a/arch/blackfin/include/asm/traps.h
+++ b/arch/blackfin/include/asm/traps.h
@@ -59,6 +59,9 @@
         level "   or a 16-bit register is accessed with a 32-bit instruction.\n"
 #define HWC_x3(level) \
         "External Memory Addressing Error\n"
+#define EXC_0x04(level) \
+        "Unimplmented exception occured\n" \
+        level " - Maybe you forgot to install a custom exception handler?\n"
 #define HWC_x12(level) \
         "Performance Monitor Overflow\n"
 #define HWC_x18(level) \
@@ -84,7 +87,7 @@
         level "   a particular processor implementation.\n"
 #define EXC_0x22(level) \
         "Illegal instruction combination\n" \
-        level " - See section for multi-issue rules in the ADSP-BF53x Blackfin\n" \
+        level " - See section for multi-issue rules in the Blackfin\n" \
         level "   Processor Instruction Set Reference.\n"
 #define EXC_0x23(level) \
         "Data access CPLB protection violation\n" \