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  * Copyright (c) 2013 Dmitry Chagin
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer
   11  *    in this position and unchanged.
   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
   17  *
   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.
   28  *
   29  * $FreeBSD: releng/10.4/sys/compat/linux/linux_emul.h 302962 2016-07-17 15:07:33Z dchagin $
   30  */
   31 
   32 #ifndef _LINUX_EMUL_H_
   33 #define _LINUX_EMUL_H_
   34 
   35 /*
   36  * modeled after similar structure in NetBSD
   37  * this will be extended as we need more functionality
   38  */
   39 struct linux_emuldata {
   40         int    *child_set_tid;  /* in clone(): Child's TID to set on clone */
   41         int    *child_clear_tid;/* in clone(): Child's TID to clear on exit */
   42 
   43         int     pdeath_signal;          /* parent death signal */
   44         int     flags;                  /* thread emuldata flags */
   45         int     em_tid;                 /* thread id */
   46 
   47         struct  linux_robust_list_head  *robust_futexes;
   48 };
   49 
   50 struct linux_emuldata   *em_find(struct thread *);
   51 
   52 void    linux_proc_init(struct thread *, struct thread *, int);
   53 void    linux_proc_exit(void *, struct proc *);
   54 void    linux_schedtail(struct thread *);
   55 void    linux_proc_exec(void *, struct proc *, struct image_params *);
   56 void    linux_thread_dtor(void *arg __unused, struct thread *);
   57 void    linux_thread_detach(struct thread *);
   58 int     linux_common_execve(struct thread *, struct image_args *);
   59 
   60 /* process emuldata flags */
   61 #define LINUX_XDEPR_REQUEUEOP   0x00000001      /* uses deprecated
   62                                                    futex REQUEUE op*/
   63 #define LINUX_XUNSUP_EPOLL      0x00000002      /* unsupported epoll events */
   64 #define LINUX_XUNSUP_FUTEXPIOP  0x00000004      /* uses unsupported pi futex */
   65 
   66 struct linux_pemuldata {
   67         uint32_t        flags;          /* process emuldata flags */
   68         struct sx       pem_sx;         /* lock for this struct */
   69         void            *epoll;         /* epoll data */
   70         uint32_t        persona;        /* process execution domain */
   71 };
   72 
   73 #define LINUX_PEM_XLOCK(p)      sx_xlock(&(p)->pem_sx)
   74 #define LINUX_PEM_XUNLOCK(p)    sx_xunlock(&(p)->pem_sx)
   75 #define LINUX_PEM_SLOCK(p)      sx_slock(&(p)->pem_sx)
   76 #define LINUX_PEM_SUNLOCK(p)    sx_sunlock(&(p)->pem_sx)
   77 
   78 struct linux_pemuldata  *pem_find(struct proc *);
   79 
   80 #endif  /* !_LINUX_EMUL_H_ */

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