1 /*-
2 * Copyright (c) 2006 Roman Divacky
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $FreeBSD: releng/9.2/sys/compat/linux/linux_emul.h 246290 2013-02-03 18:14:37Z dchagin $
29 */
30
31 #ifndef _LINUX_EMUL_H_
32 #define _LINUX_EMUL_H_
33
34 #define EMUL_SHARED_HASXSTAT 0x01
35
36 struct linux_emuldata_shared {
37 int refs;
38 int flags;
39 int xstat;
40 pid_t group_pid;
41
42 LIST_HEAD(, linux_emuldata) threads; /* head of list of linux threads */
43 };
44
45 /*
46 * modeled after similar structure in NetBSD
47 * this will be extended as we need more functionality
48 */
49 struct linux_emuldata {
50 pid_t pid;
51
52 int *child_set_tid; /* in clone(): Child's TID to set on clone */
53 int *child_clear_tid;/* in clone(): Child's TID to clear on exit */
54
55 struct linux_emuldata_shared *shared;
56
57 int pdeath_signal; /* parent death signal */
58 int flags; /* different emuldata flags */
59
60 struct linux_robust_list_head *robust_futexes;
61
62 LIST_ENTRY(linux_emuldata) threads; /* list of linux threads */
63 };
64
65 struct linux_emuldata *em_find(struct proc *, int locked);
66
67 /*
68 * DTrace probes for locks should be fired after locking and before releasing
69 * to prevent races (to provide data/function stability in dtrace, see the
70 * output of "dtrace -v ..." and the corresponding dtrace docs).
71 */
72 #define EMUL_LOCK(l) do { \
73 mtx_lock(l); \
74 LIN_SDT_PROBE1(locks, emul_lock, \
75 locked, l); \
76 } while (0)
77 #define EMUL_UNLOCK(l) do { \
78 LIN_SDT_PROBE1(locks, emul_lock, \
79 unlock, l); \
80 mtx_unlock(l); \
81 } while (0)
82
83 #define EMUL_SHARED_RLOCK(l) do { \
84 sx_slock(l); \
85 LIN_SDT_PROBE1(locks, emul_shared_rlock, \
86 locked, l); \
87 } while (0)
88 #define EMUL_SHARED_RUNLOCK(l) do { \
89 LIN_SDT_PROBE1(locks, emul_shared_rlock, \
90 unlock, l); \
91 sx_sunlock(l); \
92 } while (0)
93 #define EMUL_SHARED_WLOCK(l) do { \
94 sx_xlock(l); \
95 LIN_SDT_PROBE1(locks, emul_shared_wlock, \
96 locked, l); \
97 } while (0)
98 #define EMUL_SHARED_WUNLOCK(l) do { \
99 LIN_SDT_PROBE1(locks, emul_shared_wlock, \
100 unlock, l); \
101 sx_xunlock(l); \
102 } while (0)
103
104 /* for em_find use */
105 #define EMUL_DOLOCK 1
106 #define EMUL_DONTLOCK 0
107
108 /* emuldata flags */
109 #define LINUX_XDEPR_REQUEUEOP 0x00000001 /* uses deprecated
110 futex REQUEUE op*/
111
112 int linux_proc_init(struct thread *, pid_t, int);
113 void linux_proc_exit(void *, struct proc *);
114 void linux_schedtail(struct thread *);
115 void linux_proc_exec(void *, struct proc *, struct image_params *);
116 void linux_kill_threads(struct thread *, int);
117
118 extern struct sx emul_shared_lock;
119 extern struct mtx emul_lock;
120
121 #endif /* !_LINUX_EMUL_H_ */
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