1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2018 Turing Robotic Industries Inc.
5 * Copyright (c) 2000 Marcel Moolenaar
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
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.
15 *
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
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD$
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD$");
33
34#include <sys/param.h>
35#include <sys/fcntl.h>
36#include <sys/imgact.h>
37#include <sys/ktr.h>
38#include <sys/proc.h>
39#include <sys/sdt.h>
40
41#include <security/audit/audit.h>
42
43#include <arm64/linux/linux.h>
44#include <arm64/linux/linux_proto.h>
45#include <compat/linux/linux_dtrace.h>
46#include <compat/linux/linux_emul.h>
47#include <compat/linux/linux_misc.h>
48#include <compat/linux/linux_mmap.h>
49#include <compat/linux/linux_util.h>
50
51/* DTrace init */
52LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
53
54/* DTrace probes */
55LIN_SDT_PROBE_DEFINE0(machdep, linux_set_upcall, todo);
56LIN_SDT_PROBE_DEFINE0(machdep, linux_mmap2, todo);
57LIN_SDT_PROBE_DEFINE0(machdep, linux_rt_sigsuspend, todo);
58LIN_SDT_PROBE_DEFINE0(machdep, linux_sigaltstack, todo);
59LIN_SDT_PROBE_DEFINE0(machdep, linux_set_cloned_tls, todo);
60
61/*
62 * LINUXTODO: deduplicate; linux_execve is common across archs, except that on
63 * amd64 compat linuxulator it calls freebsd32_exec_copyin_args.
64 */
65int
66linux_execve(struct thread *td, struct linux_execve_args *uap)
67{
68	struct image_args eargs;
69	char *path;
70	int error;
71
72	if (!LUSECONVPATH(td)) {
73		error = exec_copyin_args(&eargs, uap->path, UIO_USERSPACE,
74		    uap->argp, uap->envp);
75	} else {
76		LCONVPATHEXIST(td, uap->path, &path);
77		error = exec_copyin_args(&eargs, path, UIO_SYSSPACE,
78		    uap->argp, uap->envp);
79		LFREEPATH(path);
80	}
81	if (error == 0)
82		error = linux_common_execve(td, &eargs);
83	AUDIT_SYSCALL_EXIT(error == EJUSTRETURN ? 0 : error, td);
84	return (error);
85}
86
87/* LINUXTODO: implement (or deduplicate) arm64 linux_set_upcall */
88int
89linux_set_upcall(struct thread *td, register_t stack)
90{
91
92	LIN_SDT_PROBE0(machdep, linux_set_upcall, todo);
93	return (EDOOFUS);
94}
95
96/* LINUXTODO: deduplicate arm64 linux_mmap2 */
97int
98linux_mmap2(struct thread *td, struct linux_mmap2_args *uap)
99{
100
101	LIN_SDT_PROBE0(machdep, linux_mmap2, todo);
102	return (linux_mmap_common(td, PTROUT(uap->addr), uap->len, uap->prot,
103	    uap->flags, uap->fd, uap->pgoff));
104}
105
106int
107linux_mprotect(struct thread *td, struct linux_mprotect_args *uap)
108{
109
110	return (linux_mprotect_common(td, PTROUT(uap->addr), uap->len,
111	    uap->prot));
112}
113
114int
115linux_madvise(struct thread *td, struct linux_madvise_args *uap)
116{
117
118	return (linux_madvise_common(td, PTROUT(uap->addr), uap->len, uap->behav));
119}
120
121/* LINUXTODO: implement arm64 linux_rt_sigsuspend */
122int
123linux_rt_sigsuspend(struct thread *td, struct linux_rt_sigsuspend_args *uap)
124{
125
126	LIN_SDT_PROBE0(machdep, linux_rt_sigsuspend, todo);
127	return (EDOOFUS);
128}
129
130/* LINUXTODO: implement arm64 linux_sigaltstack */
131int
132linux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap)
133{
134
135	LIN_SDT_PROBE0(machdep, linux_sigaltstack, todo);
136	return (EDOOFUS);
137}
138
139/* LINUXTODO: implement arm64 linux_set_cloned_tls */
140int
141linux_set_cloned_tls(struct thread *td, void *desc)
142{
143
144	LIN_SDT_PROBE0(machdep, linux_set_cloned_tls, todo);
145	return (EDOOFUS);
146}
147