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authorAl Viro <viro@ftp.linux.org.uk>2011-08-18 21:04:39 +0200
committerRichard Weinberger <richard@nod.at>2011-11-02 14:14:57 +0100
commit00361683ce562402a189362f43370a459b166645 (patch)
tree2e0ca27bb455c671331113efcb2d1b78c14844b3 /arch/um
parentum: simplify set_handler() (diff)
downloadlinux-00361683ce562402a189362f43370a459b166645.tar.xz
linux-00361683ce562402a189362f43370a459b166645.zip
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>
Diffstat (limited to 'arch/um')
-rw-r--r--arch/um/include/shared/os.h2
-rw-r--r--arch/um/os-Linux/process.c12
-rw-r--r--arch/um/os-Linux/signal.c17
-rw-r--r--arch/um/os-Linux/skas/process.c2
4 files changed, 21 insertions, 12 deletions
diff --git a/arch/um/include/shared/os.h b/arch/um/include/shared/os.h
index 598ca825ea9f..caa66619a9b4 100644
--- a/arch/um/include/shared/os.h
+++ b/arch/um/include/shared/os.h
@@ -225,7 +225,7 @@ extern char *get_umid(void);
extern void timer_init(void);
extern void set_sigstack(void *sig_stack, int size);
extern void remove_sigstack(void);
-extern void set_handler(int sig, void (*handler)(int));
+extern void set_handler(int sig);
extern int change_sig(int signal, int on);
extern void block_signals(void);
extern void unblock_signals(void);
diff --git a/arch/um/os-Linux/process.c b/arch/um/os-Linux/process.c
index 075ae920143d..e08fe305beb1 100644
--- a/arch/um/os-Linux/process.c
+++ b/arch/um/os-Linux/process.c
@@ -235,13 +235,13 @@ out:
void init_new_thread_signals(void)
{
- set_handler(SIGSEGV, (__sighandler_t) sig_handler);
- set_handler(SIGTRAP, (__sighandler_t) sig_handler);
- set_handler(SIGFPE, (__sighandler_t) sig_handler);
- set_handler(SIGILL, (__sighandler_t) sig_handler);
- set_handler(SIGBUS, (__sighandler_t) sig_handler);
+ set_handler(SIGSEGV);
+ set_handler(SIGTRAP);
+ set_handler(SIGFPE);
+ set_handler(SIGILL);
+ set_handler(SIGBUS);
signal(SIGHUP, SIG_IGN);
- set_handler(SIGIO, (__sighandler_t) sig_handler);
+ set_handler(SIGIO);
signal(SIGWINCH, SIG_IGN);
signal(SIGTERM, SIG_DFL);
}
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 */
diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c
index 31743f1d1195..f4e02ad72e12 100644
--- a/arch/um/os-Linux/skas/process.c
+++ b/arch/um/os-Linux/skas/process.c
@@ -659,7 +659,7 @@ int start_idle_thread(void *stack, jmp_buf *switch_buf)
{
int n;
- set_handler(SIGWINCH, (__sighandler_t) sig_handler);
+ set_handler(SIGWINCH);
/*
* Can't use UML_SETJMP or UML_LONGJMP here because they save