PLEDGE_PROTEXEC
if (!(p->p_pledge & PLEDGE_PROTEXEC) && (prot & PROT_EXEC))
return pledge_fail(p, EPERM, PLEDGE_PROTEXEC);
[SYS_sysarch] = PLEDGE_PROTEXEC,
{ "prot_exec", PLEDGE_PROTEXEC },
{ PLEDGE_PROTEXEC, "prot_exec" },