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sh: Fix ptrace hw_breakpoint handling

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Since commit 34d0b5af50 it is no longer
possible to debug an application using singlestep. The old commit
converted singlestep handling via ptrace to hw_breakpoints. The
hw_breakpoint is disabled when an event is triggered and not re-enabled
again. This patch re-enables the existing hw_breakpoint before the
existing breakpoint is reused.

Signed-off-by: David Engraf <david.engraf@sysgo.com>
Cc: stable@kernel.org
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
David Engraf 2011-03-23 11:35:42 +00:00 committed by Paul Mundt
parent c49b6ecf08
commit fb7f045ace
1 changed files with 2 additions and 0 deletions
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arch/sh/kernel/ptrace_32.c
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@ -101,6 +101,8 @@ static int set_single_step(struct task_struct *tsk, unsigned long addr)
attr = bp->attr;
attr.bp_addr = addr;
/* reenable breakpoint */
attr.disabled = false;
err = modify_user_hw_breakpoint(bp, &attr);
if (unlikely(err))
return err;