xref: /freebsd/sys/arm64/linux/linux_machdep.c (revision cddbc3b40812213ff00041f79174cac0be360a2a)
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 <arm64/linux/linux.h>
42 #include <arm64/linux/linux_proto.h>
43 #include <compat/linux/linux_dtrace.h>
44 #include <compat/linux/linux_emul.h>
45 #include <compat/linux/linux_misc.h>
46 #include <compat/linux/linux_mmap.h>
47 #include <compat/linux/linux_util.h>
48 
49 /* DTrace init */
50 LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
51 
52 /* DTrace probes */
53 LIN_SDT_PROBE_DEFINE0(machdep, linux_set_upcall_kse, todo);
54 LIN_SDT_PROBE_DEFINE0(machdep, linux_mmap2, todo);
55 LIN_SDT_PROBE_DEFINE0(machdep, linux_rt_sigsuspend, todo);
56 LIN_SDT_PROBE_DEFINE0(machdep, linux_sigaltstack, todo);
57 LIN_SDT_PROBE_DEFINE0(machdep, linux_set_cloned_tls, todo);
58 
59 /*
60  * LINUXTODO: deduplicate; linux_execve is common across archs, except that on
61  * amd64 compat linuxulator it calls freebsd32_exec_copyin_args.
62  */
63 int
64 linux_execve(struct thread *td, struct linux_execve_args *uap)
65 {
66 	struct image_args eargs;
67 	char *path;
68 	int error;
69 
70 	LCONVPATHEXIST(td, uap->path, &path);
71 
72 	error = exec_copyin_args(&eargs, path, UIO_SYSSPACE, uap->argp,
73 	    uap->envp);
74 	free(path, M_TEMP);
75 	if (error == 0)
76 		error = linux_common_execve(td, &eargs);
77 	return (error);
78 }
79 
80 /* LINUXTODO: implement (or deduplicate) arm64 linux_set_upcall_kse */
81 int
82 linux_set_upcall_kse(struct thread *td, register_t stack)
83 {
84 
85 	LIN_SDT_PROBE0(machdep, linux_set_upcall_kse, todo);
86 	return (EDOOFUS);
87 }
88 
89 /* LINUXTODO: deduplicate arm64 linux_mmap2 */
90 int
91 linux_mmap2(struct thread *td, struct linux_mmap2_args *uap)
92 {
93 
94 	LIN_SDT_PROBE0(machdep, linux_mmap2, todo);
95 	return (linux_mmap_common(td, PTROUT(uap->addr), uap->len, uap->prot,
96 	    uap->flags, uap->fd, uap->pgoff));
97 }
98 
99 int
100 linux_mprotect(struct thread *td, struct linux_mprotect_args *uap)
101 {
102 
103 	return (linux_mprotect_common(td, PTROUT(uap->addr), uap->len,
104 	    uap->prot));
105 }
106 
107 /* LINUXTODO: implement arm64 linux_rt_sigsuspend */
108 int
109 linux_rt_sigsuspend(struct thread *td, struct linux_rt_sigsuspend_args *uap)
110 {
111 
112 	LIN_SDT_PROBE0(machdep, linux_rt_sigsuspend, todo);
113 	return (EDOOFUS);
114 }
115 
116 /* LINUXTODO: implement arm64 linux_sigaltstack */
117 int
118 linux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap)
119 {
120 
121 	LIN_SDT_PROBE0(machdep, linux_sigaltstack, todo);
122 	return (EDOOFUS);
123 }
124 
125 /* LINUXTODO: implement arm64 linux_set_cloned_tls */
126 int
127 linux_set_cloned_tls(struct thread *td, void *desc)
128 {
129 
130 	LIN_SDT_PROBE0(machdep, linux_set_cloned_tls, todo);
131 	return (EDOOFUS);
132 }
133