um: fill the handlers array at build time

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>

1 files changed, 13 insertions, 4 deletions

diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c
index f248fb2ab58c..c4a4e2026630 100644
--- a/arch/um/os-Linux/signal.c
+++ b/arch/um/os-Linux/signal.c
@@ -111,7 +111,7 @@ void alarm_handler(int sig, struct sigcontext *sc)
 
 void timer_init(void)
 {
-        set_handler(SIGVTALRM, (__sighandler_t) alarm_handler);
+        set_handler(SIGVTALRM);
 }
 
 void set_sigstack(void *sig_stack, int size)
@@ -124,7 +124,17 @@ void set_sigstack(void *sig_stack, int size)
                 panic("enabling signal stack failed, errno = %d\n", errno);
 }
 
-static void (*handlers[_NSIG])(int sig, struct sigcontext *sc);
+static void (*handlers[_NSIG])(int sig, struct sigcontext *sc) = {
+        [SIGSEGV] = sig_handler,
+        [SIGBUS] = sig_handler,
+        [SIGILL] = sig_handler,
+        [SIGFPE] = sig_handler,
+        [SIGTRAP] = sig_handler,
+
+        [SIGIO] = sig_handler,
+        [SIGWINCH] = sig_handler,
+        [SIGVTALRM] = alarm_handler
+};
 
 static void handle_signal(int sig, struct sigcontext *sc)
 {
@@ -173,13 +183,12 @@ static void hard_handler(int sig, siginfo_t *info, void *p)
         handle_signal(sig, (struct sigcontext *) &uc->uc_mcontext);
 }
 
-void set_handler(int sig, void (*handler)(int))
+void set_handler(int sig)
 {
         struct sigaction action;
         int flags = SA_SIGINFO | SA_ONSTACK;
         sigset_t sig_mask;
 
-        handlers[sig] = (void (*)(int, struct sigcontext *)) handler;
         action.sa_sigaction = hard_handler;
 
         /* block irq ones */