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/pcb.h

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    1 /*-
    2  * Copyright (c) 1990 The Regents of the University of California.
    3  * All rights reserved.
    4  *
    5  * This code is derived from software contributed to Berkeley by
    6  * William Jolitz.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. All advertising materials mentioning features or use of this software
   17  *    must display the following acknowledgement:
   18  *      This product includes software developed by the University of
   19  *      California, Berkeley and its contributors.
   20  * 4. Neither the name of the University nor the names of its contributors
   21  *    may be used to endorse or promote products derived from this software
   22  *    without specific prior written permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  *
   36  *      from: @(#)pcb.h 5.10 (Berkeley) 5/12/91
   37  * $FreeBSD: stable/4/sys/i386/include/pcb.h 81664 2001-08-15 01:23:54Z peter $
   38  */
   39 
   40 #ifndef _I386_PCB_H_
   41 #define _I386_PCB_H_
   42 
   43 /*
   44  * Intel 386 process control block
   45  */
   46 #include <machine/globals.h>
   47 #include <machine/npx.h>
   48 
   49 struct pcb {
   50         int     pcb_cr3;
   51         int     pcb_edi;
   52         int     pcb_esi;
   53         int     pcb_ebp;
   54         int     pcb_esp;
   55         int     pcb_ebx;
   56         int     pcb_eip;
   57 
   58         int     pcb_dr0;
   59         int     pcb_dr1;
   60         int     pcb_dr2;
   61         int     pcb_dr3;
   62         int     pcb_dr6;
   63         int     pcb_dr7;
   64 
   65 #ifdef USER_LDT
   66         struct  pcb_ldt *pcb_ldt;       /* per process (user) LDT */
   67 #else
   68         struct  pcb_ldt *pcb_ldt_dontuse;
   69 #endif
   70         union   savefpu pcb_save;
   71         u_char  pcb_flags;
   72 #define FP_SOFTFP       0x01    /* process using software fltng pnt emulator */
   73 #define PCB_DBREGS      0x02    /* process using debug registers */
   74         caddr_t pcb_onfault;    /* copyin/out fault recovery */
   75 #ifdef SMP
   76         u_long  pcb_mpnest;
   77 #else
   78         u_long  pcb_mpnest_dontuse;
   79 #endif
   80         int     pcb_gs;
   81         struct  pcb_ext *pcb_ext;       /* optional pcb extension */
   82         u_long  __pcb_spare[3]; /* adjust to avoid core dump size changes */
   83 };
   84 
   85 /*
   86  * The pcb is augmented with machine-dependent additional data for
   87  * core dumps. For the i386: ???
   88  */
   89 struct md_coredump {
   90 };
   91 
   92 #ifdef _KERNEL
   93 
   94 #ifndef curpcb
   95 extern struct pcb *curpcb;              /* our current running pcb */
   96 #endif
   97 
   98 void    savectx __P((struct pcb *));
   99 #endif
  100 
  101 #endif /* _I386_PCB_H_ */

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