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Diffstat (limited to 'arch/arm/kernel/traps.c')
-rw-r--r--arch/arm/kernel/traps.c17
1 files changed, 16 insertions, 1 deletions
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 6807cb1e76d..2d3436e9f71 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -355,9 +355,24 @@ asmlinkage void __exception do_undefinstr(struct pt_regs *regs)
pc = (void __user *)instruction_pointer(regs);
if (processor_mode(regs) == SVC_MODE) {
- instr = *(u32 *) pc;
+#ifdef CONFIG_THUMB2_KERNEL
+ if (thumb_mode(regs)) {
+ instr = ((u16 *)pc)[0];
+ if (is_wide_instruction(instr)) {
+ instr <<= 16;
+ instr |= ((u16 *)pc)[1];
+ }
+ } else
+#endif
+ instr = *(u32 *) pc;
} else if (thumb_mode(regs)) {
get_user(instr, (u16 __user *)pc);
+ if (is_wide_instruction(instr)) {
+ unsigned int instr2;
+ get_user(instr2, (u16 __user *)pc+1);
+ instr <<= 16;
+ instr |= instr2;
+ }
} else {
get_user(instr, (u32 __user *)pc);
}