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authorDavid Engraf <david.engraf@sysgo.com>2011-03-23 11:35:42 (GMT)
committerPaul Mundt <lethal@linux-sh.org>2011-03-23 13:18:25 (GMT)
commitfb7f045ace0624f1e59a7db8497e460bd54b1cbc (patch)
tree52e4ebc446dc2e506bffd1ee56fb5f9ce86cd02c
parentc49b6ecf0870e78fa40497cd8b142915c1d5c7c9 (diff)
downloadlinux-fb7f045ace0624f1e59a7db8497e460bd54b1cbc.tar.xz
sh: Fix ptrace hw_breakpoint handling
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> Cc: stable@kernel.org Signed-off-by: Paul Mundt <lethal@linux-sh.org>
-rw-r--r--arch/sh/kernel/ptrace_32.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/sh/kernel/ptrace_32.c b/arch/sh/kernel/ptrace_32.c
index b53664e..2130ca6 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;