void
linux_proc_init(struct thread *td, struct thread *newtd, int flags)
{
struct linux_emuldata *em;
struct linux_pemuldata *pem;
struct epoll_emuldata *emd;
struct proc *p;
if (newtd != NULL) {
p = newtd->td_proc;
/* non-exec call */
em = malloc(sizeof(*em), M_TEMP, M_WAITOK | M_ZERO);
if (flags & LINUX_CLONE_THREAD) {
LINUX_CTR1(proc_init, "thread newtd(%d)",
newtd->td_tid);
em->em_tid = newtd->td_tid;
} else {
LINUX_CTR1(proc_init, "fork newtd(%d)", p->p_pid);
em->em_tid = p->p_pid;
pem = malloc(sizeof(*pem), M_LINUX, M_WAITOK | M_ZERO);
sx_init(&pem->pem_sx, "lpemlk");
p->p_emuldata = pem;
}
newtd->td_emuldata = em;
} else {
p = td->td_proc;
/* exec */
LINUX_CTR1(proc_init, "exec newtd(%d)", p->p_pid);
/* lookup the old one */
em = em_find(td);
KASSERT(em != NULL, ("proc_init: emuldata not found in exec case.\n"));
em->em_tid = p->p_pid;
em->flags = 0;
em->pdeath_signal = 0;
em->robust_futexes = NULL;
em->child_clear_tid = NULL;
em->child_set_tid = NULL;
/* epoll should be destroyed in a case of exec. */
pem = pem_find(p);
KASSERT(pem != NULL, ("proc_exit: proc emuldata not found.\n"));
if (pem->epoll != NULL) {
emd = pem->epoll;
pem->epoll = NULL;
free(emd, M_EPOLL);
}
}
}
static void
linux_fixup_prot(struct thread *td, int *prot)
{
struct linux_pemuldata *pem;
if (SV_PROC_FLAG(td->td_proc, SV_ILP32) && *prot & PROT_READ) {
pem = pem_find(td->td_proc);
if (pem->persona & LINUX_READ_IMPLIES_EXEC)
*prot |= PROT_EXEC;
}
}
