void
runtime·setsig(int32 i, void (*fn)(int32, Siginfo*, void*, G*), bool restart)
{
Sigaction sa;
// If SIGHUP handler is SIG_IGN, assume running
// under nohup and do not set explicit handler.
if(i == SIGHUP) {
runtime·memclr((byte*)&sa, sizeof sa);
if(runtime·rt_sigaction(i, nil, &sa, sizeof(sa.sa_mask)) != 0)
runtime·throw("rt_sigaction read failure");
if(sa.sa_handler == SIG_IGN)
return;
}
runtime·memclr((byte*)&sa, sizeof sa);
sa.sa_flags = SA_ONSTACK | SA_SIGINFO | SA_RESTORER;
if(restart)
sa.sa_flags |= SA_RESTART;
sa.sa_mask = ~0ULL;
sa.sa_restorer = (void*)runtime·sigreturn;
if(fn == runtime·sighandler)
fn = (void*)runtime·sigtramp;
sa.sa_handler = fn;
if(runtime·rt_sigaction(i, &sa, nil, sizeof(sa.sa_mask)) != 0)
runtime·throw("rt_sigaction failure");
}
void
runtime·initsig(int32 queue)
{
static Sigaction sa;
runtime·siginit();
int32 i;
sa.sa_flags = SA_ONSTACK | SA_SIGINFO | SA_RESTORER;
sa.sa_mask = 0xFFFFFFFFFFFFFFFFULL;
sa.sa_restorer = (void*)runtime·sigreturn;
for(i = 0; i<NSIG; i++) {
if(runtime·sigtab[i].flags) {
if((runtime·sigtab[i].flags & SigQueue) != queue)
continue;
if(runtime·sigtab[i].flags & (SigCatch | SigQueue))
sa.sa_handler = (void*)runtime·sigtramp;
else
sa.sa_handler = (void*)runtime·sigignore;
if(runtime·sigtab[i].flags & SigRestart)
sa.sa_flags |= SA_RESTART;
else
sa.sa_flags &= ~SA_RESTART;
runtime·rt_sigaction(i, &sa, nil, 8);
}
}
}
void install_tls_segv_handler()
{
struct k_sigaction sa;
struct k_sigaction old_sa;
memset(&sa, 0, sizeof(sa));
sa.sa_hand = (__sighandler_t)tls_segv_handler;
sa.sa_flags = SA_SIGINFO;
syscall_check(rt_sigaction(SIGSEGV, &sa, &old_sa, sizeof(arch_sigset_t)), 0, "set_rt_sigaction");
}
static void
sigaction(int32 i, void (*fn)(int32, Siginfo*, void*, G*), bool restart)
{
Sigaction sa;
runtime·memclr((byte*)&sa, sizeof sa);
sa.sa_flags = SA_ONSTACK | SA_SIGINFO | SA_RESTORER;
if(restart)
sa.sa_flags |= SA_RESTART;
sa.sa_mask = ~0ULL;
sa.sa_restorer = (void*)runtime·sigreturn;
if(fn == runtime·sighandler)
fn = (void*)runtime·sigtramp;
sa.sa_handler = fn;
runtime·rt_sigaction(i, &sa, nil, 8);
}
