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/*-
* Copyright (c) 2006 Roman Divacky
* 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
* in this position and unchanged.
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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_
#define EMUL_SHARED_HASXSTAT 0x01
struct linux_emuldata_shared {
int refs;
int flags;
int xstat;
pid_t group_pid;
LIST_HEAD(, linux_emuldata) threads; /* head of list of linux threads */
};
/*
* modeled after similar structure in NetBSD
* this will be extended as we need more functionality
*/
struct linux_emuldata {
pid_t pid;
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 */
struct linux_emuldata_shared *shared;
int pdeath_signal; /* parent death signal */
int flags; /* different emuldata flags */
struct linux_robust_list_head *robust_futexes;
LIST_ENTRY(linux_emuldata) threads; /* list of linux threads */
};
struct linux_emuldata *em_find(struct proc *, int locked);
/*
* DTrace probes for locks should be fired after locking and before releasing
* to prevent races (to provide data/function stability in dtrace, see the
* output of "dtrace -v ..." and the corresponding dtrace docs).
*/
#define EMUL_LOCK(l) do { \
mtx_lock(l); \
LIN_SDT_PROBE1(locks, emul_lock, \
locked, l); \
} while (0)
#define EMUL_UNLOCK(l) do { \
LIN_SDT_PROBE1(locks, emul_lock, \
unlock, l); \
mtx_unlock(l); \
} while (0)
#define EMUL_SHARED_RLOCK(l) do { \
sx_slock(l); \
LIN_SDT_PROBE1(locks, emul_shared_rlock, \
locked, l); \
} while (0)
#define EMUL_SHARED_RUNLOCK(l) do { \
LIN_SDT_PROBE1(locks, emul_shared_rlock, \
unlock, l); \
sx_sunlock(l); \
} while (0)
#define EMUL_SHARED_WLOCK(l) do { \
sx_xlock(l); \
LIN_SDT_PROBE1(locks, emul_shared_wlock, \
locked, l); \
} while (0)
#define EMUL_SHARED_WUNLOCK(l) do { \
LIN_SDT_PROBE1(locks, emul_shared_wlock, \
unlock, l); \
sx_xunlock(l); \
} while (0)
/* for em_find use */
#define EMUL_DOLOCK 1
#define EMUL_DONTLOCK 0
/* emuldata flags */
#define LINUX_XDEPR_REQUEUEOP 0x00000001 /* uses deprecated
futex REQUEUE op*/
int linux_proc_init(struct thread *, pid_t, int);
void linux_proc_exit(void *, struct proc *);
void linux_schedtail(struct thread *);
void linux_proc_exec(void *, struct proc *, struct image_params *);
void linux_kill_threads(struct thread *, int);
extern struct sx emul_shared_lock;
extern struct mtx emul_lock;
#endif /* !_LINUX_EMUL_H_ */
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