1 /*- 2 * Copyright (c) 1991 Regents of the University of California. 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 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 * from: @(#)proc.h 7.1 (Berkeley) 5/15/91 30 * $FreeBSD$ 31 */ 32 33 #ifndef _MACHINE_PROC_H_ 34 #define _MACHINE_PROC_H_ 35 36 #include <machine/segments.h> 37 38 struct proc_ldt { 39 caddr_t ldt_base; 40 int ldt_refcnt; 41 }; 42 43 /* 44 * Machine-dependent part of the proc structure for AMD64. 45 */ 46 struct mdthread { 47 int md_spinlock_count; /* (k) */ 48 register_t md_saved_flags; /* (k) */ 49 }; 50 51 struct mdproc { 52 struct proc_ldt *md_ldt; /* (t) per-process ldt */ 53 struct system_segment_descriptor md_ldt_sd; 54 }; 55 56 #ifdef _KERNEL 57 58 /* Get the current kernel thread stack usage. */ 59 #define GET_STACK_USAGE(total, used) do { \ 60 struct thread *td = curthread; \ 61 (total) = td->td_kstack_pages * PAGE_SIZE; \ 62 (used) = (char *)td->td_kstack + \ 63 td->td_kstack_pages * PAGE_SIZE - \ 64 (char *)&td; \ 65 } while (0) 66 67 void set_user_ldt(struct mdproc *); 68 struct proc_ldt *user_ldt_alloc(struct proc *, int); 69 void user_ldt_free(struct thread *); 70 void user_ldt_deref(struct proc_ldt *); 71 struct sysarch_args; 72 int sysarch_ldt(struct thread *td, struct sysarch_args *uap, int uap_space); 73 int amd64_set_ldt_data(struct thread *td, int start, int num, 74 struct user_segment_descriptor *descs); 75 76 extern struct mtx dt_lock; 77 extern int max_ldt_segment; 78 79 #endif /* _KERNEL */ 80 81 #endif /* !_MACHINE_PROC_H_ */ 82