The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/linux_emul.h

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    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/7.4/sys/compat/linux/linux_emul.h 192759 2009-05-25 14:36:21Z dchagin $
   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         int     used_requeue;           /* uses deprecated futex op */
   55 
   56         struct  linux_robust_list_head  *robust_futexes;
   57 
   58         LIST_ENTRY(linux_emuldata) threads;     /* list of linux threads */
   59 };
   60 
   61 struct linux_emuldata   *em_find(struct proc *, int locked);
   62 
   63 #define EMUL_LOCK(l)            mtx_lock(l)
   64 #define EMUL_UNLOCK(l)          mtx_unlock(l)
   65 
   66 #define EMUL_SHARED_RLOCK(l)    sx_slock(l)
   67 #define EMUL_SHARED_RUNLOCK(l)  sx_sunlock(l)
   68 #define EMUL_SHARED_WLOCK(l)    sx_xlock(l)
   69 #define EMUL_SHARED_WUNLOCK(l)  sx_xunlock(l)
   70 
   71 /* for em_find use */
   72 #define EMUL_DOLOCK             1
   73 #define EMUL_DONTLOCK           0
   74 
   75 int     linux_proc_init(struct thread *, pid_t, int);
   76 void    linux_proc_exit(void *, struct proc *);
   77 void    linux_schedtail(void *, struct proc *);
   78 void    linux_proc_exec(void *, struct proc *, struct image_params *);
   79 
   80 extern struct sx        emul_shared_lock;
   81 extern struct mtx       emul_lock;
   82 
   83 #endif  /* !_LINUX_EMUL_H_ */

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