xref: /freebsd/sys/i386/include/proc.h (revision d93a896ef95946b0bf1219866fcb324b78543444)
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  * 3. 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_len;
41         int     ldt_refcnt;
42         u_long  ldt_active;
43         struct  segment_descriptor ldt_sd;
44 };
45 
46 /*
47  * Machine-dependent part of the proc structure for i386.
48  * Table of MD locks:
49  *       t - Descriptor tables lock
50  */
51 struct mdthread {
52 	int	md_spinlock_count;	/* (k) */
53 	register_t md_saved_flags;	/* (k) */
54 	register_t md_spurflt_addr;	/* (k) Spurious page fault address. */
55 };
56 
57 struct mdproc {
58 	struct proc_ldt *md_ldt;	/* (t) per-process ldt */
59 };
60 
61 #define	KINFO_PROC_SIZE 768
62 
63 struct syscall_args {
64 	u_int code;
65 	struct sysent *callp;
66 	register_t args[8];
67 	int narg;
68 };
69 
70 #ifdef	_KERNEL
71 
72 /* Get the current kernel thread stack usage. */
73 #define GET_STACK_USAGE(total, used) do {				\
74 	struct thread	*td = curthread;				\
75 	(total) = td->td_kstack_pages * PAGE_SIZE;			\
76 	(used) = (char *)td->td_kstack +				\
77 	    td->td_kstack_pages * PAGE_SIZE -				\
78 	    (char *)&td;						\
79 } while (0)
80 
81 void 	set_user_ldt(struct mdproc *);
82 struct 	proc_ldt *user_ldt_alloc(struct mdproc *, int);
83 void 	user_ldt_free(struct thread *);
84 void	user_ldt_deref(struct proc_ldt *pldt);
85 
86 extern struct mtx dt_lock;
87 #endif	/* _KERNEL */
88 
89 #endif /* !_MACHINE_PROC_H_ */
90