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  * 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  *      from: @(#)proc.h        7.1 (Berkeley) 5/15/91
   32  * $FreeBSD: stable/12/sys/i386/include/proc.h 326023 2017-11-20 19:43:44Z pfg $
   33  */
   34 
   35 #ifndef _MACHINE_PROC_H_
   36 #define _MACHINE_PROC_H_
   37 
   38 #include <machine/segments.h>
   39 
   40 struct proc_ldt {
   41         caddr_t ldt_base;
   42         int     ldt_len;
   43         int     ldt_refcnt;
   44         u_long  ldt_active;
   45         struct  segment_descriptor ldt_sd;
   46 };
   47 
   48 /*
   49  * Machine-dependent part of the proc structure for i386.
   50  * Table of MD locks:
   51  *       t - Descriptor tables lock
   52  */
   53 struct mdthread {
   54         int     md_spinlock_count;      /* (k) */
   55         register_t md_saved_flags;      /* (k) */
   56         register_t md_spurflt_addr;     /* (k) Spurious page fault address. */
   57 };
   58 
   59 struct mdproc {
   60         struct proc_ldt *md_ldt;        /* (t) per-process ldt */
   61 };
   62 
   63 #define KINFO_PROC_SIZE 768
   64 
   65 struct syscall_args {
   66         u_int code;
   67         struct sysent *callp;
   68         register_t args[8];
   69         int narg;
   70 };
   71 
   72 #ifdef  _KERNEL
   73 
   74 /* Get the current kernel thread stack usage. */
   75 #define GET_STACK_USAGE(total, used) do {                               \
   76         struct thread   *td = curthread;                                \
   77         (total) = td->td_kstack_pages * PAGE_SIZE;                      \
   78         (used) = (char *)td->td_kstack +                                \
   79             td->td_kstack_pages * PAGE_SIZE -                           \
   80             (char *)&td;                                                \
   81 } while (0)
   82 
   83 void    set_user_ldt(struct mdproc *);
   84 struct  proc_ldt *user_ldt_alloc(struct mdproc *, int);
   85 void    user_ldt_free(struct thread *);
   86 void    user_ldt_deref(struct proc_ldt *pldt);
   87 
   88 extern struct mtx dt_lock;
   89 #endif  /* _KERNEL */
   90 
   91 #endif /* !_MACHINE_PROC_H_ */

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