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  * $FreeBSD$
   38  */
   39 
   40 #ifndef _I386_PCB_H_
   41 #define _I386_PCB_H_
   42 
   43 /*
   44  * Intel 386 process control block
   45  */
   46 #include <machine/npx.h>
   47 
   48 struct pcb {
   49         int     pcb_cr3;
   50         int     pcb_edi;
   51         int     pcb_esi;
   52         int     pcb_ebp;
   53         int     pcb_esp;
   54         int     pcb_ebx;
   55         int     pcb_eip;
   56         caddr_t pcb_ldt;                /* per process (user) LDT */
   57         int     pcb_ldt_len;            /* number of LDT entries */
   58         struct  save87  pcb_savefpu;    /* floating point state for 287/387 */
   59         u_char  pcb_flags;
   60 #define FP_SOFTFP       0x01    /* process using software fltng pnt emulator */
   61         caddr_t pcb_onfault;    /* copyin/out fault recovery */
   62 #ifdef SMP
   63         u_long  pcb_mpnest;
   64 #else
   65         u_long  pcb_mpnest_dontuse;
   66 #endif
   67         int     pcb_fs;
   68         int     pcb_gs;
   69 #ifdef VM86
   70         struct  pcb_ext *pcb_ext;       /* optional pcb extension */
   71 #else
   72         struct  pcb_ext *pcb_ext_dontuse;
   73 #endif
   74         u_long  __pcb_spare[1]; /* adjust to avoid core dump size changes */
   75 };
   76 
   77 /*
   78  * The pcb is augmented with machine-dependent additional data for
   79  * core dumps. For the i386: ???
   80  */
   81 struct md_coredump {
   82 };
   83 
   84 #ifdef KERNEL
   85 
   86 extern struct pcb *curpcb;              /* our current running pcb */
   87 
   88 void    savectx __P((struct pcb *));
   89 #endif
   90 
   91 #endif /* _I386_PCB_H_ */

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