[PATCH] ppc32: fix single-stepping of emulated instructions

On ppc, we emulate instructions that cause alignment exceptions.  If we are
single-stepping an instruction and it causes an alignment exception, we
will currently do the next instruction as well before taking the
single-step exception.  This patch fixes that, so we take the single-step
exception after emulating the instruction.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/arch/ppc/kernel/traps.c b/arch/ppc/kernel/traps.c
index aec225b402ae..002322a1f3ce 100644
--- a/arch/ppc/kernel/traps.c
+++ b/arch/ppc/kernel/traps.c
@@ -679,6 +679,7 @@ void AlignmentException(struct pt_regs *regs)
         fixed = fix_alignment(regs);
         if (fixed == 1) {
                 regs->nip += 4; /* skip over emulated instruction */
+                emulate_single_step(regs);
                 return;
         }
         if (fixed == -EFAULT) {