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

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2006 Roman Divacky
      * Copyright (c) 2013 Dmitry Chagin
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD$
     */
    
    #ifndef _LINUX_EMUL_H_
    #define _LINUX_EMUL_H_
    
    struct image_params;
    
    /*
     * modeled after similar structure in NetBSD
     * this will be extended as we need more functionality
     */
    struct linux_emuldata {
            int    *child_set_tid;  /* in clone(): Child's TID to set on clone */
            int    *child_clear_tid;/* in clone(): Child's TID to clear on exit */
    
            int     flags;                  /* thread emuldata flags */
            int     em_tid;                 /* thread id */
    
            struct  linux_robust_list_head  *robust_futexes;
    };
    
    struct linux_emuldata   *em_find(struct thread *);
    
    int     linux_exec_imgact_try(struct image_params *);
    void    linux_proc_init(struct thread *, struct thread *, int);
    void    linux_on_exit(struct proc *);
    void    linux_schedtail(struct thread *);
    void    linux_on_exec(struct proc *, struct image_params *);
    void    linux_thread_dtor(struct thread *);
    void    linux_thread_detach(struct thread *);
    int     linux_common_execve(struct thread *, struct image_args *);
    
    /* process emuldata flags */
    #define LINUX_XDEPR_REQUEUEOP   0x00000001      /* uses deprecated
                                                       futex REQUEUE op*/
    #define LINUX_XUNSUP_EPOLL      0x00000002      /* unsupported epoll events */
    #define LINUX_XUNSUP_FUTEXPIOP  0x00000004      /* uses unsupported pi futex */
    
    struct linux_pemuldata {
            uint32_t        flags;          /* process emuldata flags */
            struct sx       pem_sx;         /* lock for this struct */
            uint32_t        persona;        /* process execution domain */
            uint32_t        ptrace_flags;   /* used by ptrace(2) */
    };
    
    #define LINUX_PEM_XLOCK(p)      sx_xlock(&(p)->pem_sx)
    #define LINUX_PEM_XUNLOCK(p)    sx_xunlock(&(p)->pem_sx)
    #define LINUX_PEM_SLOCK(p)      sx_slock(&(p)->pem_sx)
    #define LINUX_PEM_SUNLOCK(p)    sx_sunlock(&(p)->pem_sx)
    
    struct linux_pemuldata  *pem_find(struct proc *);
    
    #endif  /* !_LINUX_EMUL_H_ */

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