2 * Copyright (c) 2015 The FreeBSD Foundation
4 * This software was developed by Andrew Turner under
5 * sponsorship from the FreeBSD Foundation.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/param.h>
31 #include <sys/systm.h>
33 #include <sys/sysproto.h>
37 #include <vm/vm_map.h>
39 #include <machine/sysarch.h>
40 #include <machine/vmparam.h>
43 sysarch(struct thread *td, struct sysarch_args *uap)
45 struct arm64_guard_page_args gp_args;
50 case ARM64_GUARD_PAGE:
51 error = copyin(uap->parms, &gp_args, sizeof(gp_args));
55 /* Only accept canonical addresses, no PAC or TBI */
56 if (!ADDR_IS_CANONICAL(gp_args.addr))
59 eva = gp_args.addr + gp_args.len;
61 /* Check for a length overflow */
62 if (gp_args.addr > eva)
65 /* Check in the correct address space */
66 if (eva >= VM_MAX_USER_ADDRESS)
73 error = pmap_bti_set(vmspace_pmap(td->td_proc->p_vmspace),
74 trunc_page(gp_args.addr), round_page(eva));