From c45aea27617d6a1e0aacddc3b0233f704222fcbd Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Fri, 25 Jul 2008 19:45:50 -0700 Subject: [PATCH] tracehook: tracehook_signal_handler 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 Cc: Oleg Nesterov Reviewed-by: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/tracehook.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/include/linux/tracehook.h b/include/linux/tracehook.h index e113e09b034..2d1426f8e33 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 /* */ -- 2.41.1