FreeBSD/Linux Kernel Cross Reference
sys/emulation/linux/linux_emuldata.h

     /*      $NetBSD: linux_emuldata.h,v 1.16 2008/10/26 16:38:22 christos Exp $     */
     
     /*-
      * Copyright (c) 1998,2002 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Eric Haszlakiewicz.
      *
     * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
     */
    
    #include "linux_futex.h"
    
    #ifndef _SYS_LOCK_H
    #include <sys/lock.h>
    #endif
    
    #ifndef _COMMON_LINUX_EMULDATA_H
    #define _COMMON_LINUX_EMULDATA_H
    
    /*
     * This is auxillary data the linux compat code
     * needs to do its work.  A pointer to it is
     * stored in the emuldata field of the proc
     * structure.
     */
    struct linux_emuldata_shared {
            void *  p_break;        /* Processes' idea of break */
            int refs;
            pid_t group_pid;        /* PID of Linux process (group of threads) */
            /* List of Linux threads (NetBSD processes) in the Linux process */
            LIST_HEAD(, linux_emuldata) threads;
            int flags;              /* See below */
            int xstat;              /* Thread group exit code, for exit_group */
    };
    
    #define LINUX_LES_INEXITGROUP   0x1     /* thread group doing exit_group() */
    #define LINUX_LES_USE_NPTL      0x2     /* Need to emulate NPTL threads */
    
    struct linux_emuldata {
    #if 0 /* notyet */
            sigset_t ps_siginfo;    /* Which signals have a RT handler */
    #endif
            int     debugreg[8];    /* GDB information for ptrace - for use, */
                                    /* see ../arch/i386/linux_ptrace.c */
            struct linux_emuldata_shared *s;
    
            void *parent_tidptr;    /* Used during clone() */
            void *child_tidptr;     /* Used during clone() */
            int clone_flags;        /* Used during clone() */
            int flags;
            void *clear_tid;        /* Own TID to clear on exit */
            void *set_tls;          /* Pointer to child TLS desc in user space */
    
            struct linux_robust_list_head *robust_futexes;
    
            /* List of Linux threads (NetBSD processes) in the Linux process */
            LIST_ENTRY(linux_emuldata) threads;
            struct proc *proc;      /* backpointer to struct proc */
    };
    
    #define EMUL_DIDKILL    0x01
    
    #define LINUX_CHILD_QUIETEXIT   0x1     /* Child will have quietexit set */
    #define LINUX_QUIETEXIT         0x2     /* Quiet exit (no zombie state) */
    
    #define EMUL_LOCKINIT(x)        lockinit(&emul_lock, "tux_emul", 0, LK_CANRECURSE)
    #define EMUL_LOCKUNINIT(x)      lockuninit(&emul_lock)
    
    #define EMUL_LOCK(x)    lockmgr(&emul_lock, LK_EXCLUSIVE)
    #define EMUL_UNLOCK(x)  lockmgr(&emul_lock, LK_RELEASE)
    
    extern struct lock emul_lock;
    
    struct linux_emuldata *emuldata_get(struct proc *p);
    void    emuldata_set_robust(struct proc *p, struct linux_robust_list_head *robust_ftx);
    int     emuldata_init(struct proc *p, struct proc *pchild, int flags);
    void    emuldata_exit(void *unused, struct proc *p);
    void    linux_proc_transition(void *unused, struct image_params *imgp);
   void    linux_proc_fork(struct proc *p, struct proc *parent, void *child_tidptr);
   #endif /* !_COMMON_LINUX_EMULDATA_H */

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