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/6.4/sys/i386/include/proc.h 176063 2008-02-06 21:02:56Z mav $
   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  */
   49 struct mdthread {
   50         int     md_spinlock_count;      /* (k) */
   51         register_t md_saved_flags;      /* (k) */
   52         register_t md_fault_addr;       /* (k) */
   53 };
   54 
   55 struct mdproc {
   56         struct proc_ldt *md_ldt;        /* (j) per-process ldt */
   57 };
   58 
   59 #ifdef  _KERNEL
   60 
   61 /* Get the current kernel thread stack usage. */
   62 #define GET_STACK_USAGE(total, used) do {                               \
   63         struct thread   *td = curthread;                                \
   64         (total) = td->td_kstack_pages * PAGE_SIZE;                      \
   65         (used) = (char *)td->td_kstack +                                \
   66             td->td_kstack_pages * PAGE_SIZE -                           \
   67             (char *)&td;                                                \
   68 } while (0)
   69 
   70 void    set_user_ldt(struct mdproc *);
   71 struct  proc_ldt *user_ldt_alloc(struct mdproc *, int);
   72 void    user_ldt_free(struct thread *);
   73 
   74 #endif  /* _KERNEL */
   75 
   76 #endif /* !_MACHINE_PROC_H_ */

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