1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2006 Roman Divacky 5 * All rights reserved. 6 * Copyright (c) 2013 Dmitry Chagin <dchagin@FreeBSD.org> 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef _LINUX_EMUL_H_ 31 #define _LINUX_EMUL_H_ 32 33 #include <machine/../linux/linux_emul_md.h> 34 35 struct image_args; 36 struct image_params; 37 38 /* 39 * modeled after similar structure in NetBSD 40 * this will be extended as we need more functionality 41 */ 42 struct linux_emuldata { 43 int *child_set_tid; /* in clone(): Child's TID to set on clone */ 44 int *child_clear_tid;/* in clone(): Child's TID to clear on exit */ 45 46 int flags; /* thread emuldata flags */ 47 int em_tid; /* thread id */ 48 49 struct linux_robust_list_head *robust_futexes; 50 }; 51 52 struct linux_emuldata *em_find(struct thread *); 53 54 void linux_proc_init(struct thread *, struct thread *, bool); 55 void linux_on_exit(struct proc *); 56 void linux_schedtail(struct thread *); 57 int linux_on_exec(struct proc *, struct image_params *); 58 void linux_thread_dtor(struct thread *); 59 int linux_common_execve(struct thread *, struct image_args *); 60 61 /* process emuldata flags */ 62 #define LINUX_XDEPR_REQUEUEOP 0x00000001 /* uses deprecated 63 futex REQUEUE op*/ 64 #define LINUX_XUNSUP_EPOLL 0x00000002 /* unsupported epoll events */ 65 #define LINUX_XUNSUP_FUTEXPIOP 0x00000004 /* uses unsupported pi futex */ 66 67 struct linux_pemuldata { 68 uint32_t flags; /* process emuldata flags */ 69 struct sx pem_sx; /* lock for this struct */ 70 uint32_t persona; /* process execution domain */ 71 uint32_t ptrace_flags; /* used by ptrace(2) */ 72 uint32_t oom_score_adj; /* /proc/self/oom_score_adj */ 73 uint32_t so_timestamp; /* requested timeval */ 74 uint32_t so_timestampns; /* requested timespec */ 75 struct linux_pemuldata_md pem_md; /* machine-dependent state */ 76 }; 77 78 #define LINUX_PEM_XLOCK(p) sx_xlock(&(p)->pem_sx) 79 #define LINUX_PEM_XUNLOCK(p) sx_xunlock(&(p)->pem_sx) 80 #define LINUX_PEM_SLOCK(p) sx_slock(&(p)->pem_sx) 81 #define LINUX_PEM_SUNLOCK(p) sx_sunlock(&(p)->pem_sx) 82 83 struct linux_pemuldata *pem_find(struct proc *); 84 85 /* 86 * Machine-dependent hooks for struct linux_pemuldata lifecycle 87 * events, implemented per-arch: initialization of pem_md when the 88 * emuldata is created (fork, or a process switching to the Linux 89 * ABI) and reset at exec. 90 */ 91 void linux_pemuldata_init_md(struct thread *, struct linux_pemuldata *); 92 void linux_pemuldata_exec_md(struct linux_pemuldata *); 93 94 #endif /* !_LINUX_EMUL_H_ */ 95