1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1991 Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef _MACHINE_PROC_H_ 33 #define _MACHINE_PROC_H_ 34 35 #include <machine/segments.h> 36 37 struct proc_ldt { 38 caddr_t ldt_base; 39 int ldt_len; 40 int ldt_refcnt; 41 u_long ldt_active; 42 struct segment_descriptor ldt_sd; 43 }; 44 45 /* 46 * Machine-dependent part of the proc structure for i386. 47 * Table of MD locks: 48 * t - Descriptor tables lock 49 */ 50 struct mdthread { 51 int md_spinlock_count; /* (k) */ 52 register_t md_saved_flags; /* (k) */ 53 register_t md_spurflt_addr; /* (k) Spurious page fault address. */ 54 }; 55 56 struct mdproc { 57 struct proc_ldt *md_ldt; /* (t) per-process ldt */ 58 }; 59 60 #define KINFO_PROC_SIZE 768 61 62 #ifdef _KERNEL 63 64 #include <machine/md_var.h> 65 66 void set_user_ldt(struct mdproc *); 67 struct proc_ldt *user_ldt_alloc(struct mdproc *, int); 68 void user_ldt_free(struct thread *); 69 void user_ldt_deref(struct proc_ldt *pldt); 70 71 extern struct mtx dt_lock; 72 #endif /* _KERNEL */ 73 74 #endif /* !_MACHINE_PROC_H_ */ 75