The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/include/proc.h

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    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: releng/8.4/sys/i386/include/proc.h 233649 2012-03-29 06:01:11Z alc $
   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 #ifdef  _KERNEL
   64 
   65 /* Get the current kernel thread stack usage. */
   66 #define GET_STACK_USAGE(total, used) do {                               \
   67         struct thread   *td = curthread;                                \
   68         (total) = td->td_kstack_pages * PAGE_SIZE;                      \
   69         (used) = (char *)td->td_kstack +                                \
   70             td->td_kstack_pages * PAGE_SIZE -                           \
   71             (char *)&td;                                                \
   72 } while (0)
   73 
   74 void    set_user_ldt(struct mdproc *);
   75 struct  proc_ldt *user_ldt_alloc(struct mdproc *, int);
   76 void    user_ldt_free(struct thread *);
   77 void    user_ldt_deref(struct proc_ldt *pldt);
   78 
   79 extern struct mtx dt_lock;
   80 
   81 struct syscall_args {
   82         u_int code;
   83         struct sysent *callp;
   84         register_t args[8];
   85         int narg;
   86 };
   87 #define HAVE_SYSCALL_ARGS_DEF 1
   88 
   89 #endif  /* _KERNEL */
   90 
   91 #endif /* !_MACHINE_PROC_H_ */

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