new helper: signal_delivered()

Does block_sigmask() + tracehook_signal_handler();  called when
sigframe has been successfully built.  All architectures converted
to it; block_sigmask() itself is gone now (merged into this one).

I'm still not too happy with the signature, but that's a separate
story (IMO we need a structure that would contain signal number +
siginfo + k_sigaction, so that get_signal_to_deliver() would fill one,
signal_delivered(), handle_signal() and probably setup...frame() -
take one).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 13 insertions, 9 deletions

diff --git a/kernel/signal.c b/kernel/signal.c
index df8d721a9e6f..677102789cf2 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2368,17 +2368,20 @@ relock:
 }
 
 /**
- * block_sigmask - add @ka's signal mask to current->blocked
- * @ka: action for @signr
- * @signr: signal that has been successfully delivered
+ * signal_delivered - 
+ * @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
  *
  * This function should be called when a signal has succesfully been
- * delivered. It adds the mask of signals for @ka to current->blocked
- * so that they are blocked during the execution of the signal
- * handler. In addition, @signr will be blocked unless %SA_NODEFER is
- * set in @ka->sa.sa_flags.
+ * delivered. It updates the blocked signals accordingly (@ka->sa.sa_mask
+ * is always blocked, and the signal itself is blocked unless %SA_NODEFER
+ * is set in @ka->sa.sa_flags.  Tracing is notified.
  */
-void block_sigmask(struct k_sigaction *ka, int signr)
+void signal_delivered(int sig, siginfo_t *info, struct k_sigaction *ka,
+                        struct pt_regs *regs, int stepping)
 {
         sigset_t blocked;
 
@@ -2390,8 +2393,9 @@ void block_sigmask(struct k_sigaction *ka, int signr)
 
         sigorsets(&blocked, &current->blocked, &ka->sa.sa_mask);
         if (!(ka->sa.sa_flags & SA_NODEFER))
-                sigaddset(&blocked, signr);
+                sigaddset(&blocked, sig);
         set_current_blocked(&blocked);
+        tracehook_signal_handler(sig, info, ka, regs, stepping);
 }
 
 /*