int
setucontext32(struct lwp *l, const ucontext32_t *ucp)
{
struct proc *p = l->l_proc;
int error;
KASSERT(mutex_owned(p->p_lock));
if ((ucp->uc_flags & _UC_SIGMASK) != 0) {
error = sigprocmask1(l, SIG_SETMASK, &ucp->uc_sigmask, NULL);
if (error != 0)
return error;
}
mutex_exit(p->p_lock);
error = cpu_setmcontext32(l, &ucp->uc_mcontext, ucp->uc_flags);
mutex_enter(p->p_lock);
if (error != 0)
return (error);
l->l_ctxlink = (void *)(intptr_t)ucp->uc_link;
/*
* If there was stack information, update whether or not we are
* still running on an alternate signal stack.
*/
if ((ucp->uc_flags & _UC_STACK) != 0) {
if (ucp->uc_stack.ss_flags & SS_ONSTACK)
l->l_sigstk.ss_flags |= SS_ONSTACK;
else
l->l_sigstk.ss_flags &= ~SS_ONSTACK;
}
return 0;
}
void
startlwp32(void *arg)
{
ucontext32_t *uc = arg;
lwp_t *l = curlwp;
int error __diagused;
error = cpu_setmcontext32(l, &uc->uc_mcontext, uc->uc_flags);
KASSERT(error == 0);
kmem_free(uc, sizeof(ucontext32_t));
userret(l, 0, 0);
}
void
startlwp32(void *arg)
{
ucontext32_t *uc = arg;
lwp_t *l = curlwp;
int error __diagused;
error = cpu_setmcontext32(l, &uc->uc_mcontext, uc->uc_flags);
KASSERT(error == 0);
/* Note: we are freeing ucontext_t, not ucontext32_t. */
kmem_free(arg, sizeof(ucontext_t));
userret(l, 0, 0);
}
/*
* Start a new LWP
*/
void
startlwp32(void *arg)
{
ucontext32_t * const uc = arg;
int error __diagused;
error = cpu_setmcontext32(curlwp, &uc->uc_mcontext, uc->uc_flags);
KASSERT(error == 0);
// Even though this is a ucontext32_t, the space allocated was for a
// full ucontext_t
kmem_free(uc, sizeof(ucontext_t));
userret(curlwp);
}