Messages in this thread Patch in this message |  | | | From | Roland McGrath <> | | Subject | [PATCH 10/23] tracehook: tracehook_signal_handler | | Date | Thu, 17 Jul 2008 00:30:01 -0700 (PDT) |
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This defines tracehook_signal_handler() as a hook for the arch signal handling code to call. It gives ptrace the opportunity to stop for a pseudo-single-step trap immediately after signal handler setup is done.
Signed-off-by: Roland McGrath <roland@redhat.com> --- include/linux/tracehook.h | 23 +++++++++++++++++++++++ 1 files changed, 23 insertions(+), 0 deletions(-) diff --git a/include/linux/tracehook.h b/include/linux/tracehook.h index e113e09..2d1426f 100644 --- a/include/linux/tracehook.h +++ b/include/linux/tracehook.h @@ -289,4 +289,27 @@ static inline void tracehook_finish_release_task(struct task_struct *task) ptrace_release_task(task); } +/** + * tracehook_signal_handler - signal handler setup is complete + * @sig: number of signal being delivered + * @info: siginfo_t of signal being delivered + * @ka: sigaction setting that chose the handler + * @regs: user register state + * @stepping: nonzero if debugger single-step or block-step in use + * + * Called by the arch code after a signal handler has been set up. + * Register and stack state reflects the user handler about to run. + * Signal mask changes have already been made. + * + * Called without locks, shortly before returning to user mode + * (or handling more signals). + */ +static inline void tracehook_signal_handler(int sig, siginfo_t *info, + const struct k_sigaction *ka, + struct pt_regs *regs, int stepping) +{ + if (stepping) + ptrace_notify(SIGTRAP); +} + #endif /* <linux/tracehook.h> */
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