xref: /freebsd/sys/arm64/linux/linux_machdep.c (revision c66ec88fed842fbaad62c30d510644ceb7bd2d71)
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 */
52 LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
53 
54 /* DTrace probes */
55 LIN_SDT_PROBE_DEFINE0(machdep, linux_set_upcall_kse, todo);
56 LIN_SDT_PROBE_DEFINE0(machdep, linux_mmap2, todo);
57 LIN_SDT_PROBE_DEFINE0(machdep, linux_rt_sigsuspend, todo);
58 LIN_SDT_PROBE_DEFINE0(machdep, linux_sigaltstack, todo);
59 LIN_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  */
65 int
66 linux_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_kse */
88 int
89 linux_set_upcall_kse(struct thread *td, register_t stack)
90 {
91 
92 	LIN_SDT_PROBE0(machdep, linux_set_upcall_kse, todo);
93 	return (EDOOFUS);
94 }
95 
96 /* LINUXTODO: deduplicate arm64 linux_mmap2 */
97 int
98 linux_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 
106 int
107 linux_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 
114 int
115 linux_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 */
122 int
123 linux_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 */
131 int
132 linux_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 */
140 int
141 linux_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