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[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>
hifive-unleashed-5.1
Paul Mackerras 2005-04-16 15:24:17 -07:00 committed by Linus Torvalds
parent e378cc16b0
commit 6c26e03b2d
1 changed files with 1 additions and 0 deletions
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arch/ppc/kernel/traps.c
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@ -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) {