scc

 1#include <string.h>
 2
 3#include <arch/sigaction.h>
 4#include <sys.h>
 5
 6extern void _sigreturn(void);
 7
 8int _sigaction(int sig, struct sigaction *sa, struct sigaction *old)
 9{
10	struct sigaction ksa, *p = NULL;
11
12	if (sa) {
13		ksa.sa_handler = sa->sa_handler;
14		ksa.sa_flags = sa->sa_flags | SA_RESTORER;
15		ksa.sa_restorer = _sigreturn;
16		memcpy(&ksa.sa_mask, &sa->sa_mask, sizeof(ksa.sa_mask));
17		p = &ksa;
18	}
19
20	if (__sigaction(sig, p, old, sizeof(ksa.sa_mask)) < 0)
21		return -1;
22
23	return 0;
24}