musl/src/signal/sigsetjmp_tail.c

#include <setjmp.h>
#include <signal.h>
#include "syscall.h"

#ifdef SHARED
__attribute__((__visibility__("hidden")))
#endif
int __sigsetjmp_tail(sigjmp_buf jb, int ret)
{
	void *p = jb->__ss;
	__syscall(SYS_rt_sigprocmask, SIG_SETMASK, ret?p:0, ret?0:p, _NSIG/8);
	return ret;
}