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/emulation/linux/linux_emuldata.h

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    1 /*      $NetBSD: linux_emuldata.h,v 1.16 2008/10/26 16:38:22 christos Exp $     */
    2 
    3 /*-
    4  * Copyright (c) 1998,2002 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Eric Haszlakiewicz.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   29  * POSSIBILITY OF SUCH DAMAGE.
   30  */
   31 
   32 #include "linux_futex.h"
   33 
   34 #ifndef _SYS_LOCK_H
   35 #include <sys/lock.h>
   36 #endif
   37 
   38 #ifndef _COMMON_LINUX_EMULDATA_H
   39 #define _COMMON_LINUX_EMULDATA_H
   40 
   41 /*
   42  * This is auxillary data the linux compat code
   43  * needs to do its work.  A pointer to it is
   44  * stored in the emuldata field of the proc
   45  * structure.
   46  */
   47 struct linux_emuldata_shared {
   48         void *  p_break;        /* Processes' idea of break */
   49         int refs;
   50         pid_t group_pid;        /* PID of Linux process (group of threads) */
   51         /* List of Linux threads (NetBSD processes) in the Linux process */
   52         LIST_HEAD(, linux_emuldata) threads;
   53         int flags;              /* See below */
   54         int xstat;              /* Thread group exit code, for exit_group */
   55 };
   56 
   57 #define LINUX_LES_INEXITGROUP   0x1     /* thread group doing exit_group() */
   58 #define LINUX_LES_USE_NPTL      0x2     /* Need to emulate NPTL threads */
   59 
   60 struct linux_emuldata {
   61 #if 0 /* notyet */
   62         sigset_t ps_siginfo;    /* Which signals have a RT handler */
   63 #endif
   64         int     debugreg[8];    /* GDB information for ptrace - for use, */
   65                                 /* see ../arch/i386/linux_ptrace.c */
   66         struct linux_emuldata_shared *s;
   67 
   68         void *parent_tidptr;    /* Used during clone() */
   69         void *child_tidptr;     /* Used during clone() */
   70         int clone_flags;        /* Used during clone() */
   71         int flags;
   72         void *clear_tid;        /* Own TID to clear on exit */
   73         void *set_tls;          /* Pointer to child TLS desc in user space */
   74 
   75         struct linux_robust_list_head *robust_futexes;
   76 
   77         /* List of Linux threads (NetBSD processes) in the Linux process */
   78         LIST_ENTRY(linux_emuldata) threads;
   79         struct proc *proc;      /* backpointer to struct proc */
   80 };
   81 
   82 #define EMUL_DIDKILL    0x01
   83 
   84 #define LINUX_CHILD_QUIETEXIT   0x1     /* Child will have quietexit set */
   85 #define LINUX_QUIETEXIT         0x2     /* Quiet exit (no zombie state) */
   86 
   87 #define EMUL_LOCKINIT(x)        lockinit(&emul_lock, "tux_emul", 0, LK_CANRECURSE)
   88 #define EMUL_LOCKUNINIT(x)      lockuninit(&emul_lock)
   89 
   90 #define EMUL_LOCK(x)    lockmgr(&emul_lock, LK_EXCLUSIVE)
   91 #define EMUL_UNLOCK(x)  lockmgr(&emul_lock, LK_RELEASE)
   92 
   93 extern struct lock emul_lock;
   94 
   95 struct linux_emuldata *emuldata_get(struct proc *p);
   96 void    emuldata_set_robust(struct proc *p, struct linux_robust_list_head *robust_ftx);
   97 int     emuldata_init(struct proc *p, struct proc *pchild, int flags);
   98 void    emuldata_exit(void *unused, struct proc *p);
   99 void    linux_proc_transition(void *unused, struct image_params *imgp);
  100 void    linux_proc_fork(struct proc *p, struct proc *parent, void *child_tidptr);
  101 #endif /* !_COMMON_LINUX_EMULDATA_H */

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