2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1994 Christos Zoulas
5 * Copyright (c) 1995 Frank van der Linden
6 * Copyright (c) 1995 Scott Bartram
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 * from: svr4_util.c,v 1.5 1995/01/22 23:44:50 christos Exp
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
37 #include "opt_compat.h"
39 #include <sys/param.h>
41 #include <sys/fcntl.h>
43 #include <sys/malloc.h>
44 #include <sys/kernel.h>
45 #include <sys/linker_set.h>
46 #include <sys/mutex.h>
47 #include <sys/namei.h>
50 #include <sys/syscallsubr.h>
51 #include <sys/systm.h>
52 #include <sys/vnode.h>
54 #include <machine/stdarg.h>
56 #include <compat/linux/linux_util.h>
58 MALLOC_DEFINE(M_LINUX, "linux", "Linux mode structures");
59 MALLOC_DEFINE(M_EPOLL, "lepoll", "Linux events structures");
60 MALLOC_DEFINE(M_FUTEX, "futex", "Linux futexes");
61 MALLOC_DEFINE(M_FUTEX_WP, "futex wp", "Linux futex waiting proc");
63 const char linux_emul_path[] = "/compat/linux";
66 * Search an alternate path before passing pathname arguments on to
67 * system calls. Useful for keeping a separate 'emulation tree'.
69 * If cflag is set, we check if an attempt can be made to create the
70 * named file, i.e. we check if the directory it should be in exists.
73 linux_emul_convpath(struct thread *td, const char *path, enum uio_seg pathseg,
74 char **pbuf, int cflag, int dfd)
78 retval = kern_alternate_path(td, linux_emul_path, path, pathseg, pbuf,
85 linux_msg(const struct thread *td, const char *fmt, ...)
91 printf("linux: pid %d (%s): ", (int)p->p_pid, p->p_comm);
100 TAILQ_ENTRY(device_element) list;
101 struct linux_device_handler entry;
104 static TAILQ_HEAD(, device_element) devices =
105 TAILQ_HEAD_INITIALIZER(devices);
107 static struct linux_device_handler null_handler =
108 { "mem", "mem", "null", "null", 1, 3, 1};
110 DATA_SET(linux_device_handler_set, null_handler);
113 linux_driver_get_name_dev(device_t dev)
115 struct device_element *de;
116 const char *device_name = device_get_name(dev);
118 if (device_name == NULL)
120 TAILQ_FOREACH(de, &devices, list) {
121 if (strcmp(device_name, de->entry.bsd_driver_name) == 0)
122 return (de->entry.linux_driver_name);
129 linux_driver_get_major_minor(const char *node, int *major, int *minor)
131 struct device_element *de;
135 if (node == NULL || major == NULL || minor == NULL)
138 sz = sizeof("pts/") - 1;
139 if (strncmp(node, "pts/", sz) == 0 && node[sz] != '\0') {
141 * Linux checks major and minors of the slave device
142 * to make sure it's a pty device, so let's make him
145 devno = strtoul(node + sz, NULL, 10);
146 *major = 136 + (devno / 256);
147 *minor = devno % 256;
151 sz = sizeof("dri/card") - 1;
152 if (strncmp(node, "dri/card", sz) == 0 && node[sz] != '\0') {
153 devno = strtoul(node + sz, NULL, 10);
154 *major = 226 + (devno / 256);
155 *minor = devno % 256;
158 sz = sizeof("dri/controlD") - 1;
159 if (strncmp(node, "dri/controlD", sz) == 0 && node[sz] != '\0') {
160 devno = strtoul(node + sz, NULL, 10);
161 *major = 226 + (devno / 256);
162 *minor = devno % 256;
165 sz = sizeof("dri/renderD") - 1;
166 if (strncmp(node, "dri/renderD", sz) == 0 && node[sz] != '\0') {
167 devno = strtoul(node + sz, NULL, 10);
168 *major = 226 + (devno / 256);
169 *minor = devno % 256;
172 sz = sizeof("drm/") - 1;
173 if (strncmp(node, "drm/", sz) == 0 && node[sz] != '\0') {
174 devno = strtoul(node + sz, NULL, 10);
175 *major = 226 + (devno / 256);
176 *minor = devno % 256;
180 TAILQ_FOREACH(de, &devices, list) {
181 if (strcmp(node, de->entry.bsd_device_name) == 0) {
182 *major = de->entry.linux_major;
183 *minor = de->entry.linux_minor;
192 linux_get_char_devices()
194 struct device_element *de;
195 char *temp, *string, *last;
197 int current_size = 0, string_size = 1024;
199 string = malloc(string_size, M_LINUX, M_WAITOK);
202 TAILQ_FOREACH(de, &devices, list) {
203 if (!de->entry.linux_char_device)
206 if (strcmp(last, de->entry.bsd_driver_name) != 0) {
207 last = de->entry.bsd_driver_name;
209 snprintf(formated, sizeof(formated), "%3d %s\n",
210 de->entry.linux_major,
211 de->entry.linux_device_name);
212 if (strlen(formated) + current_size
215 string = malloc(string_size,
217 bcopy(temp, string, current_size);
220 strcat(string, formated);
221 current_size = strlen(string);
229 linux_free_get_char_devices(char *string)
232 free(string, M_LINUX);
235 static int linux_major_starting = 200;
238 linux_device_register_handler(struct linux_device_handler *d)
240 struct device_element *de;
245 de = malloc(sizeof(*de), M_LINUX, M_WAITOK);
246 if (d->linux_major < 0) {
247 d->linux_major = linux_major_starting++;
249 bcopy(d, &de->entry, sizeof(*d));
251 /* Add the element to the list, sorted on span. */
252 TAILQ_INSERT_TAIL(&devices, de, list);
258 linux_device_unregister_handler(struct linux_device_handler *d)
260 struct device_element *de;
265 TAILQ_FOREACH(de, &devices, list) {
266 if (bcmp(d, &de->entry, sizeof(*d)) == 0) {
267 TAILQ_REMOVE(&devices, de, list);