diff options
| author | David Engraf <david.engraf@sysgo.com> | 2011-03-23 11:35:42 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-03-27 11:36:13 -0700 |
| commit | e30d586e1ec3a54ab8f573aa47f64cd5b5d29029 (patch) | |
| tree | c84121963c9e07eaeae2b0e99e6a06991eff39f2 | |
| parent | a65a0507b92ab78164cb5da23c9bad093d7ef2b7 (diff) | |
| download | lwn-e30d586e1ec3a54ab8f573aa47f64cd5b5d29029.tar.gz lwn-e30d586e1ec3a54ab8f573aa47f64cd5b5d29029.zip | |
sh: Fix ptrace hw_breakpoint handling
commit fb7f045ace0624f1e59a7db8497e460bd54b1cbc upstream.
Since commit 34d0b5af50a063cded842716633501b38ff815fb 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>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | arch/sh/kernel/ptrace_32.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/sh/kernel/ptrace_32.c b/arch/sh/kernel/ptrace_32.c index b53664ef53e8..2130ca674e9b 100644 --- a/arch/sh/kernel/ptrace_32.c +++ b/arch/sh/kernel/ptrace_32.c @@ -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; |