1 /* $OpenBSD: pcb.h,v 1.7 2001/03/24 18:11:48 millert Exp $ */ 2 /* $NetBSD: pcb.h,v 1.21 1996/01/08 13:51:42 mycroft Exp $ */ 3 4 /*- 5 * Copyright (c) 1995 Charles M. Hannum. All rights reserved. 6 * Copyright (c) 1990 The Regents of the University of California. 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * William Jolitz. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)pcb.h 5.10 (Berkeley) 5/12/91 41 */ 42 43 /* 44 * Intel 386 process control block 45 */ 46 47 #ifndef _I386_PCB_H_ 48 #define _I386_PCB_H_ 49 50 #include <sys/signal.h> 51 52 #include <machine/segments.h> 53 #include <machine/tss.h> 54 #include <machine/npx.h> 55 #include <machine/sysarch.h> 56 57 #define NIOPORTS 1024 /* # of ports we allow to be mapped */ 58 59 struct pcb { 60 struct i386tss pcb_tss; 61 #define pcb_cr3 pcb_tss.tss_cr3 62 #define pcb_esp pcb_tss.tss_esp 63 #define pcb_ebp pcb_tss.tss_ebp 64 #define pcb_fs pcb_tss.tss_fs 65 #define pcb_gs pcb_tss.tss_gs 66 #define pcb_ldt_sel pcb_tss.tss_ldt 67 int pcb_tss_sel; 68 union descriptor *pcb_ldt; /* per process (user) LDT */ 69 int pcb_ldt_len; /* number of LDT entries */ 70 int pcb_cr0; /* saved image of CR0 */ 71 union fsave87 pcb_savefpu; /* floating point state for 287/387 */ 72 struct emcsts pcb_saveemc; /* Cyrix EMC state */ 73 /* 74 * Software pcb (extension) 75 */ 76 int pcb_flags; 77 #define PCB_USER_LDT 0x01 /* has user-set LDT */ 78 caddr_t pcb_onfault; /* copyin/out fault recovery */ 79 int vm86_eflags; /* virtual eflags for vm86 mode */ 80 int vm86_flagmask; /* flag mask for vm86 mode */ 81 void *vm86_userp; /* XXX performance hack */ 82 struct pmap *pcb_pmap; /* back pointer to our pmap */ 83 u_long pcb_iomap[NIOPORTS/32]; /* I/O bitmap */ 84 u_char pcb_iomap_pad; /* required; must be 0xff, says intel */ 85 }; 86 87 /* 88 * The pcb is augmented with machine-dependent additional data for 89 * core dumps. For the i386, there is nothing to add. 90 */ 91 struct md_coredump { 92 long md_pad[8]; 93 }; 94 95 #ifdef _KERNEL 96 struct pcb *curpcb; /* our current running pcb */ 97 #endif 98 99 #endif /* _I386_PCB_H_ */ 100