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

[Paul Mackerras]

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@xxxxxxxxx>

diff -urN linux-2.5/arch/ppc/kernel/traps.c pmac-2.5/arch/ppc/kernel/traps.c
--- linux-2.5/arch/ppc/kernel/traps.c	2005-03-29 16:24:53.000000000 +1000
+++ pmac-2.5/arch/ppc/kernel/traps.c	2005-03-31 08:37:53.000000000 +1000
@@ -679,6 +701,7 @@
 	fixed = fix_alignment(regs);
 	if (fixed == 1) {
 		regs->nip += 4;	/* skip over emulated instruction */
+		emulate_single_step(regs);
 		return;
 	}
 	if (fixed == -EFAULT) {
-
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