diff options
| author | Roland McGrath <roland@redhat.com> | 2008-07-25 19:45:50 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-26 12:00:09 -0700 |
| commit | c45aea27617d6a1e0aacddc3b0233f704222fcbd (patch) | |
| tree | 9406cbb5f3ca0029b2f6ef44a951fb7d21fe93f9 /include | |
| parent | fa8e26ccd485216fc45c8c2dd1ec3b7ef1a0a2f8 (diff) | |
| download | lwn-c45aea27617d6a1e0aacddc3b0233f704222fcbd.tar.gz lwn-c45aea27617d6a1e0aacddc3b0233f704222fcbd.zip | |
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 <roland@redhat.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Reviewed-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | 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 e113e09b0341..2d1426f8e33b 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> */ |