diff options
| -rw-r--r-- | arch/um/os-Linux/signal.c | 33 |
1 files changed, 12 insertions, 21 deletions
diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c index 91a35da..0fb0cc8 100644 --- a/arch/um/os-Linux/signal.c +++ b/arch/um/os-Linux/signal.c @@ -63,7 +63,7 @@ static void sig_handler_common(int sig, struct sigcontext *sc) #define SIGVTALRM_MASK (1 << SIGVTALRM_BIT) static int signals_enabled; -static unsigned int pending; +static unsigned int signals_pending; void sig_handler(int sig, struct sigcontext *sc) { @@ -71,7 +71,7 @@ void sig_handler(int sig, struct sigcontext *sc) enabled = signals_enabled; if (!enabled && (sig == SIGIO)) { - pending |= SIGIO_MASK; + signals_pending |= SIGIO_MASK; return; } @@ -99,7 +99,7 @@ void alarm_handler(int sig, struct sigcontext *sc) enabled = signals_enabled; if (!signals_enabled) { - pending |= SIGVTALRM_MASK; + signals_pending |= SIGVTALRM_MASK; return; } @@ -125,16 +125,6 @@ void set_sigstack(void *sig_stack, int size) panic("enabling signal stack failed, errno = %d\n", errno); } -void remove_sigstack(void) -{ - stack_t stack = ((stack_t) { .ss_flags = SS_DISABLE, - .ss_sp = NULL, - .ss_size = 0 }); - - if (sigaltstack(&stack, NULL) != 0) - panic("disabling signal stack failed, errno = %d\n", errno); -} - void (*handlers[_NSIG])(int sig, struct sigcontext *sc); void handle_signal(int sig, struct sigcontext *sc) @@ -213,13 +203,14 @@ void set_handler(int sig, void (*handler)(int), int flags, ...) int change_sig(int signal, int on) { - sigset_t sigset, old; + sigset_t sigset; sigemptyset(&sigset); sigaddset(&sigset, signal); - if (sigprocmask(on ? SIG_UNBLOCK : SIG_BLOCK, &sigset, &old) < 0) + if (sigprocmask(on ? SIG_UNBLOCK : SIG_BLOCK, &sigset, NULL) < 0) return -errno; - return !sigismember(&old, signal); + + return 0; } void block_signals(void) @@ -244,26 +235,26 @@ void unblock_signals(void) /* * We loop because the IRQ handler returns with interrupts off. So, * interrupts may have arrived and we need to re-enable them and - * recheck pending. + * recheck signals_pending. */ while(1) { /* * Save and reset save_pending after enabling signals. This - * way, pending won't be changed while we're reading it. + * way, signals_pending won't be changed while we're reading it. */ signals_enabled = 1; /* - * Setting signals_enabled and reading pending must + * Setting signals_enabled and reading signals_pending must * happen in this order. */ barrier(); - save_pending = pending; + save_pending = signals_pending; if (save_pending == 0) return; - pending = 0; + signals_pending = 0; /* * We have pending interrupts, so disable signals, as the |
