1 /* $NetBSD: pcb.h,v 1.21 1996/01/08 13:51:42 mycroft Exp $ */ 2 3 /*- 4 * Copyright (c) 1995 Charles M. Hannum. All rights reserved. 5 * Copyright (c) 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * William Jolitz. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#)pcb.h 5.10 (Berkeley) 5/12/91 40 */ 41 42 /* 43 * Intel 386 process control block 44 */ 45 46 #ifndef _I386_PCB_H_ 47 #define _I386_PCB_H_ 48 49 #include <sys/signal.h> 50 51 #include <machine/segments.h> 52 #include <machine/tss.h> 53 #include <machine/npx.h> 54 #include <machine/sysarch.h> 55 56 #define NIOPORTS 1024 /* # of ports we allow to be mapped */ 57 58 struct pcb { 59 struct i386tss pcb_tss; 60 #define pcb_cr3 pcb_tss.tss_cr3 61 #define pcb_esp pcb_tss.tss_esp 62 #define pcb_ebp pcb_tss.tss_ebp 63 #define pcb_fs pcb_tss.tss_fs 64 #define pcb_gs pcb_tss.tss_gs 65 #define pcb_ldt_sel pcb_tss.tss_ldt 66 int pcb_tss_sel; 67 union descriptor *pcb_ldt; /* per process (user) LDT */ 68 int pcb_ldt_len; /* number of LDT entries */ 69 int pcb_cr0; /* saved image of CR0 */ 70 struct save87 pcb_savefpu; /* floating point state for 287/387 */ 71 struct emcsts pcb_saveemc; /* Cyrix EMC state */ 72 /* 73 * Software pcb (extension) 74 */ 75 int pcb_flags; 76 #define PCB_USER_LDT 0x01 /* has user-set LDT */ 77 caddr_t pcb_onfault; /* copyin/out fault recovery */ 78 int vm86_eflags; /* virtual eflags for vm86 mode */ 79 int vm86_flagmask; /* flag mask for vm86 mode */ 80 void *vm86_userp; /* XXX performance hack */ 81 u_long pcb_iomap[NIOPORTS/32]; /* I/O bitmap */ 82 }; 83 84 /* 85 * The pcb is augmented with machine-dependent additional data for 86 * core dumps. For the i386, there is nothing to add. 87 */ 88 struct md_coredump { 89 long md_pad[8]; 90 }; 91 92 #ifdef _KERNEL 93 struct pcb *curpcb; /* our current running pcb */ 94 #endif 95 96 #endif /* _I386_PCB_H_ */ 97