minix/lib/posix/_sigreturn.c

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2005-04-21 16:53:53 +02:00
#include <lib.h>
#define sigfillset _sigfillset
#define sigprocmask _sigprocmask
#define sigreturn _sigreturn
#include <sys/sigcontext.h>
#include <signal.h>
PUBLIC int sigreturn(scp)
register struct sigcontext *scp;
{
sigset_t set;
/* The message can't be on the stack, because the stack will vanish out
* from under us. The send part of sendrec will succeed, but when
* a message is sent to restart the current process, who knows what will
* be in the place formerly occupied by the message?
*/
static message m;
/* Protect against race conditions by blocking all interrupts. */
sigfillset(&set); /* splhi */
sigprocmask(SIG_SETMASK, &set, (sigset_t *) NULL);
m.m2_l1 = scp->sc_mask;
m.m2_i2 = scp->sc_flags;
m.m2_p1 = (char *) scp;
return(_syscall(MM, SIGRETURN, &m)); /* normally this doesn't return */
}