x86_get_ldt1
error = x86_get_ldt1(l, &ua, cp);
int x86_get_ldt1(struct lwp *, struct x86_get_ldt_args *, union descriptor *);
error = x86_get_ldt1(l, &ua, cp);
error = x86_get_ldt1(l, &gl, ldt_buf);