1 /* $OpenBSD: pcb.h,v 1.16 2011/03/23 16:54:35 pirofti 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. 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 * @(#)pcb.h 5.10 (Berkeley) 5/12/91 37 */ 38 39 /* 40 * Intel 386 process control block 41 */ 42 43 #ifndef _MACHINE_PCB_H_ 44 #define _MACHINE_PCB_H_ 45 46 #include <sys/signal.h> 47 48 #include <machine/segments.h> 49 #include <machine/tss.h> 50 #include <machine/npx.h> 51 #include <machine/sysarch.h> 52 53 #define NIOPORTS 1024 /* # of ports we allow to be mapped */ 54 55 struct pcb { 56 struct i386tss pcb_tss; 57 #define pcb_cr3 pcb_tss.tss_cr3 58 #define pcb_esp pcb_tss.tss_esp 59 #define pcb_ebp pcb_tss.tss_ebp 60 #define pcb_cs pcb_tss.tss_cs 61 #define pcb_ldt_sel pcb_tss.tss_ldt 62 union descriptor *pcb_ldt; /* per process (user) LDT */ 63 int pcb_ldt_len; /* number of LDT entries */ 64 union savefpu pcb_savefpu; /* floating point state for FPU */ 65 int pcb_cr0; /* saved image of CR0 */ 66 struct emcsts pcb_saveemc; /* Cyrix EMC state */ 67 struct segment_descriptor pcb_threadsegs[2]; 68 /* per-thread descriptors */ 69 /* 70 * Software pcb (extension) 71 */ 72 caddr_t pcb_onfault; /* copyin/out fault recovery */ 73 int vm86_eflags; /* virtual eflags for vm86 mode */ 74 int vm86_flagmask; /* flag mask for vm86 mode */ 75 void *vm86_userp; /* XXX performance hack */ 76 struct pmap *pcb_pmap; /* back pointer to our pmap */ 77 struct cpu_info *pcb_fpcpu; /* cpu holding our fpu state */ 78 u_long pcb_iomap[NIOPORTS/32]; /* I/O bitmap */ 79 u_char pcb_iomap_pad; /* required; must be 0xff, says intel */ 80 int pcb_flags; 81 #define PCB_SAVECTX 0x00000001 82 }; 83 84 /* the indexes of the %fs/%gs segments in pcb_threadsegs */ 85 #define TSEG_FS 0 86 #define TSEG_GS 1 87 88 /* 89 * The pcb is augmented with machine-dependent additional data for 90 * core dumps. For the i386, there is nothing to add. 91 */ 92 struct md_coredump { 93 long md_pad[8]; 94 }; 95 96 #endif /* _MACHINE_PCB_H_ */ 97