sys/emulation/linux/linux_emuldata.h

   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 */