xref: /freebsd/sys/compat/linux/linux_emul.h (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
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  * $FreeBSD$
29  */
30 
31 #ifndef _LINUX_EMUL_H_
32 #define	_LINUX_EMUL_H_
33 
34 struct linux_emuldata_shared {
35 	int	refs;
36 	pid_t	group_pid;
37 
38 	LIST_HEAD(, linux_emuldata) threads; /* head of list of linux threads */
39 };
40 
41 /*
42  * modeled after similar structure in NetBSD
43  * this will be extended as we need more functionality
44  */
45 struct linux_emuldata {
46 	pid_t	pid;
47 
48 	int    *child_set_tid;	/* in clone(): Child's TID to set on clone */
49 	int    *child_clear_tid;/* in clone(): Child's TID to clear on exit */
50 
51 	struct linux_emuldata_shared *shared;
52 
53 	int	pdeath_signal;		/* parent death signal */
54 
55 	LIST_ENTRY(linux_emuldata) threads;	/* list of linux threads */
56 };
57 
58 struct linux_emuldata	*em_find(struct proc *, int locked);
59 
60 #define	EMUL_LOCK(l)		mtx_lock(l)
61 #define	EMUL_UNLOCK(l)		mtx_unlock(l)
62 
63 #define	EMUL_SHARED_RLOCK(l)	sx_slock(l)
64 #define	EMUL_SHARED_RUNLOCK(l)	sx_sunlock(l)
65 #define	EMUL_SHARED_WLOCK(l)	sx_xlock(l)
66 #define	EMUL_SHARED_WUNLOCK(l)	sx_xunlock(l)
67 
68 /* for em_find use */
69 #define	EMUL_DOLOCK		1
70 #define	EMUL_DONTLOCK		0
71 
72 int	linux_proc_init(struct thread *, pid_t, int);
73 void	linux_proc_exit(void *, struct proc *);
74 void	linux_schedtail(void *, struct proc *);
75 void	linux_proc_exec(void *, struct proc *, struct image_params *);
76 
77 extern struct sx	emul_shared_lock;
78 extern struct mtx	emul_lock;
79 
80 #endif	/* !_LINUX_EMUL_H_ */
81