2 * Copyright (c) 1994 Christos Zoulas
3 * Copyright (c) 1995 Frank van der Linden
4 * Copyright (c) 1995 Scott Bartram
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.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 * from: svr4_util.c,v 1.5 1995/01/22 23:44:50 christos Exp
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #include "opt_compat.h"
37 #include <sys/param.h>
39 #include <sys/fcntl.h>
41 #include <sys/malloc.h>
42 #include <sys/kernel.h>
43 #include <sys/linker_set.h>
44 #include <sys/mutex.h>
45 #include <sys/namei.h>
48 #include <sys/syscallsubr.h>
49 #include <sys/systm.h>
50 #include <sys/vnode.h>
52 #include <machine/stdarg.h>
54 #include <compat/linux/linux_util.h>
56 #include <machine/../linux32/linux.h>
58 #include <machine/../linux/linux.h>
61 #include <compat/linux/linux_dtrace.h>
63 const char linux_emul_path[] = "/compat/linux";
66 LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
69 * DTrace probes in this module.
71 LIN_SDT_PROBE_DEFINE5(util, linux_emul_convpath, entry, "const char *",
72 "enum uio_seg", "char **", "int", "int");
73 LIN_SDT_PROBE_DEFINE1(util, linux_emul_convpath, return, "int");
74 LIN_SDT_PROBE_DEFINE1(util, linux_msg, entry, "const char *");
75 LIN_SDT_PROBE_DEFINE0(util, linux_msg, return);
76 LIN_SDT_PROBE_DEFINE2(util, linux_driver_get_name_dev, entry, "device_t",
78 LIN_SDT_PROBE_DEFINE0(util, linux_driver_get_name_dev, nullcall);
79 LIN_SDT_PROBE_DEFINE1(util, linux_driver_get_name_dev, return, "char *");
80 LIN_SDT_PROBE_DEFINE3(util, linux_driver_get_major_minor, entry, "char *",
82 LIN_SDT_PROBE_DEFINE0(util, linux_driver_get_major_minor, nullcall);
83 LIN_SDT_PROBE_DEFINE1(util, linux_driver_get_major_minor, notfound, "char *");
84 LIN_SDT_PROBE_DEFINE3(util, linux_driver_get_major_minor, return, "int",
86 LIN_SDT_PROBE_DEFINE0(util, linux_get_char_devices, entry);
87 LIN_SDT_PROBE_DEFINE1(util, linux_get_char_devices, return, "char *");
88 LIN_SDT_PROBE_DEFINE1(util, linux_free_get_char_devices, entry, "char *");
89 LIN_SDT_PROBE_DEFINE0(util, linux_free_get_char_devices, return);
90 LIN_SDT_PROBE_DEFINE1(util, linux_device_register_handler, entry,
91 "struct linux_device_handler *");
92 LIN_SDT_PROBE_DEFINE1(util, linux_device_register_handler, return, "int");
93 LIN_SDT_PROBE_DEFINE1(util, linux_device_unregister_handler, entry,
94 "struct linux_device_handler *");
95 LIN_SDT_PROBE_DEFINE1(util, linux_device_unregister_handler, return, "int");
98 * Search an alternate path before passing pathname arguments on to
99 * system calls. Useful for keeping a separate 'emulation tree'.
101 * If cflag is set, we check if an attempt can be made to create the
102 * named file, i.e. we check if the directory it should be in exists.
105 linux_emul_convpath(struct thread *td, const char *path, enum uio_seg pathseg,
106 char **pbuf, int cflag, int dfd)
110 LIN_SDT_PROBE5(util, linux_emul_convpath, entry, path, pathseg, pbuf,
113 retval = kern_alternate_path(td, linux_emul_path, path, pathseg, pbuf,
116 LIN_SDT_PROBE1(util, linux_emul_convpath, return, retval);
121 linux_msg(const struct thread *td, const char *fmt, ...)
126 LIN_SDT_PROBE1(util, linux_msg, entry, fmt);
129 printf("linux: pid %d (%s): ", (int)p->p_pid, p->p_comm);
135 LIN_SDT_PROBE0(util, linux_msg, return);
138 struct device_element
140 TAILQ_ENTRY(device_element) list;
141 struct linux_device_handler entry;
144 static TAILQ_HEAD(, device_element) devices =
145 TAILQ_HEAD_INITIALIZER(devices);
147 static struct linux_device_handler null_handler =
148 { "mem", "mem", "null", "null", 1, 3, 1};
150 DATA_SET(linux_device_handler_set, null_handler);
153 linux_driver_get_name_dev(device_t dev)
155 struct device_element *de;
156 const char *device_name = device_get_name(dev);
158 LIN_SDT_PROBE2(util, linux_driver_get_name_dev, entry, dev,
161 if (device_name == NULL) {
162 LIN_SDT_PROBE0(util, linux_driver_get_name_dev, nullcall);
163 LIN_SDT_PROBE1(util, linux_driver_get_name_dev, return, NULL);
166 TAILQ_FOREACH(de, &devices, list) {
167 if (strcmp(device_name, de->entry.bsd_driver_name) == 0) {
168 LIN_SDT_PROBE1(util, linux_driver_get_name_dev, return,
169 de->entry.linux_driver_name);
170 return (de->entry.linux_driver_name);
174 LIN_SDT_PROBE1(util, linux_driver_get_name_dev, return, NULL);
179 linux_driver_get_major_minor(const char *node, int *major, int *minor)
181 struct device_element *de;
183 LIN_SDT_PROBE3(util, linux_driver_get_major_minor, entry, node, major,
186 if (node == NULL || major == NULL || minor == NULL) {
187 LIN_SDT_PROBE0(util, linux_driver_get_major_minor, nullcall);
188 LIN_SDT_PROBE3(util, linux_driver_get_major_minor, return, 1,
193 if (strlen(node) > strlen("pts/") &&
194 strncmp(node, "pts/", strlen("pts/")) == 0) {
198 * Linux checks major and minors of the slave device
199 * to make sure it's a pty device, so let's make him
202 devno = strtoul(node + strlen("pts/"), NULL, 10);
203 *major = 136 + (devno / 256);
204 *minor = devno % 256;
206 LIN_SDT_PROBE3(util, linux_driver_get_major_minor, return, 0,
211 TAILQ_FOREACH(de, &devices, list) {
212 if (strcmp(node, de->entry.bsd_device_name) == 0) {
213 *major = de->entry.linux_major;
214 *minor = de->entry.linux_minor;
216 LIN_SDT_PROBE3(util, linux_driver_get_major_minor,
217 return, 0, *major, *minor);
222 LIN_SDT_PROBE1(util, linux_driver_get_major_minor, notfound, node);
223 LIN_SDT_PROBE3(util, linux_driver_get_major_minor, return, 1, 0, 0);
228 linux_get_char_devices()
230 struct device_element *de;
231 char *temp, *string, *last;
233 int current_size = 0, string_size = 1024;
235 LIN_SDT_PROBE0(util, linux_get_char_devices, entry);
237 string = malloc(string_size, M_LINUX, M_WAITOK);
240 TAILQ_FOREACH(de, &devices, list) {
241 if (!de->entry.linux_char_device)
244 if (strcmp(last, de->entry.bsd_driver_name) != 0) {
245 last = de->entry.bsd_driver_name;
247 snprintf(formated, sizeof(formated), "%3d %s\n",
248 de->entry.linux_major,
249 de->entry.linux_device_name);
250 if (strlen(formated) + current_size
253 string = malloc(string_size,
255 bcopy(temp, string, current_size);
258 strcat(string, formated);
259 current_size = strlen(string);
263 LIN_SDT_PROBE1(util, linux_get_char_devices, return, string);
268 linux_free_get_char_devices(char *string)
271 LIN_SDT_PROBE1(util, linux_get_char_devices, entry, string);
273 free(string, M_LINUX);
275 LIN_SDT_PROBE0(util, linux_get_char_devices, return);
278 static int linux_major_starting = 200;
281 linux_device_register_handler(struct linux_device_handler *d)
283 struct device_element *de;
285 LIN_SDT_PROBE1(util, linux_device_register_handler, entry, d);
288 LIN_SDT_PROBE1(util, linux_device_register_handler, return,
293 de = malloc(sizeof(*de), M_LINUX, M_WAITOK);
294 if (d->linux_major < 0) {
295 d->linux_major = linux_major_starting++;
297 bcopy(d, &de->entry, sizeof(*d));
299 /* Add the element to the list, sorted on span. */
300 TAILQ_INSERT_TAIL(&devices, de, list);
302 LIN_SDT_PROBE1(util, linux_device_register_handler, return, 0);
307 linux_device_unregister_handler(struct linux_device_handler *d)
309 struct device_element *de;
311 LIN_SDT_PROBE1(util, linux_device_unregister_handler, entry, d);
314 LIN_SDT_PROBE1(util, linux_device_unregister_handler, return,
319 TAILQ_FOREACH(de, &devices, list) {
320 if (bcmp(d, &de->entry, sizeof(*d)) == 0) {
321 TAILQ_REMOVE(&devices, de, list);
324 LIN_SDT_PROBE1(util, linux_device_unregister_handler,
330 LIN_SDT_PROBE1(util, linux_device_unregister_handler, return, EINVAL);