1 /*- 2 * Copyright (c) 2006 Roman Divacky 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #ifndef _LINUX_EMUL_H_ 32 #define _LINUX_EMUL_H_ 33 34 #define EMUL_SHARED_HASXSTAT 0x01 35 36 struct linux_emuldata_shared { 37 int refs; 38 int flags; 39 int xstat; 40 pid_t group_pid; 41 42 LIST_HEAD(, linux_emuldata) threads; /* head of list of linux threads */ 43 }; 44 45 /* 46 * modeled after similar structure in NetBSD 47 * this will be extended as we need more functionality 48 */ 49 struct linux_emuldata { 50 pid_t pid; 51 52 int *child_set_tid; /* in clone(): Child's TID to set on clone */ 53 int *child_clear_tid;/* in clone(): Child's TID to clear on exit */ 54 55 struct linux_emuldata_shared *shared; 56 57 int pdeath_signal; /* parent death signal */ 58 int flags; /* different emuldata flags */ 59 60 struct linux_robust_list_head *robust_futexes; 61 62 LIST_ENTRY(linux_emuldata) threads; /* list of linux threads */ 63 }; 64 65 struct linux_emuldata *em_find(struct proc *, int locked); 66 67 /* 68 * DTrace probes for locks should be fired after locking and before releasing 69 * to prevent races (to provide data/function stability in dtrace, see the 70 * output of "dtrace -v ..." and the corresponding dtrace docs). 71 */ 72 #define EMUL_LOCK(l) do { \ 73 mtx_lock(l); \ 74 LIN_SDT_PROBE1(locks, emul_lock, \ 75 locked, l); \ 76 } while (0) 77 #define EMUL_UNLOCK(l) do { \ 78 LIN_SDT_PROBE1(locks, emul_lock, \ 79 unlock, l); \ 80 mtx_unlock(l); \ 81 } while (0) 82 83 #define EMUL_SHARED_RLOCK(l) do { \ 84 sx_slock(l); \ 85 LIN_SDT_PROBE1(locks, emul_shared_rlock, \ 86 locked, l); \ 87 } while (0) 88 #define EMUL_SHARED_RUNLOCK(l) do { \ 89 LIN_SDT_PROBE1(locks, emul_shared_rlock, \ 90 unlock, l); \ 91 sx_sunlock(l); \ 92 } while (0) 93 #define EMUL_SHARED_WLOCK(l) do { \ 94 sx_xlock(l); \ 95 LIN_SDT_PROBE1(locks, emul_shared_wlock, \ 96 locked, l); \ 97 } while (0) 98 #define EMUL_SHARED_WUNLOCK(l) do { \ 99 LIN_SDT_PROBE1(locks, emul_shared_wlock, \ 100 unlock, l); \ 101 sx_xunlock(l); \ 102 } while (0) 103 104 /* for em_find use */ 105 #define EMUL_DOLOCK 1 106 #define EMUL_DONTLOCK 0 107 108 /* emuldata flags */ 109 #define LINUX_XDEPR_REQUEUEOP 0x00000001 /* uses deprecated 110 futex REQUEUE op*/ 111 112 int linux_proc_init(struct thread *, pid_t, int); 113 void linux_proc_exit(void *, struct proc *); 114 void linux_schedtail(struct thread *); 115 void linux_proc_exec(void *, struct proc *, struct image_params *); 116 void linux_kill_threads(struct thread *, int); 117 118 extern struct sx emul_shared_lock; 119 extern struct mtx emul_lock; 120 121 #endif /* !_LINUX_EMUL_H_ */ 122