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: src/sys/i386/include/pcb.h,v 1.16.2.1 1999/09/05 08:11:57 peter Exp $
   38  */
   39 
   40 #ifndef _I386_PCB_H_
   41 #define _I386_PCB_H_
   42 
   43 /*
   44  * Intel 386 process control block
   45  */
   46 #include <machine/tss.h>
   47 #include <machine/npx.h>
   48 
   49 struct pcb {
   50         struct  i386tss pcb_tss;
   51 #define pcb_ksp pcb_tss.tss_esp0
   52 #define pcb_ptd pcb_tss.tss_cr3
   53 #define pcb_cr3 pcb_ptd
   54 #define pcb_pc  pcb_tss.tss_eip
   55 #define pcb_psl pcb_tss.tss_eflags
   56 #define pcb_usp pcb_tss.tss_esp
   57 #define pcb_fp  pcb_tss.tss_ebp
   58 #ifdef  notyet
   59         u_char  pcb_iomap[NPORT/sizeof(u_char)]; /* i/o port bitmap */
   60 #endif
   61         caddr_t pcb_ldt;                /* per process (user) LDT */
   62         int     pcb_ldt_len;            /* number of LDT entries */
   63         struct  save87  pcb_savefpu;    /* floating point state for 287/387 */
   64 /*
   65  * Software pcb (extension)
   66  */
   67         u_char  pcb_flags;
   68 #define FP_SOFTFP       0x01    /* process using software fltng pnt emulator */
   69         caddr_t pcb_onfault;    /* copyin/out fault recovery */
   70 };
   71 
   72 /*
   73  * The pcb is augmented with machine-dependent additional data for
   74  * core dumps. For the i386: ???
   75  */
   76 struct md_coredump {
   77 };
   78 
   79 #ifdef KERNEL
   80 extern struct pcb *curpcb;              /* our current running pcb */
   81 void    savectx __P((struct pcb*));
   82 #endif
   83 
   84 #endif /* _I386_PCB_H_ */

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