| 1 | /* $OpenBSD: pcb.h,v 1.25 2022/02/21 14:26:19 jsg 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/npx.h> |
| 50 | #include <machine/sysarch.h> |
| 51 | |
| 52 | /* |
| 53 | * Please note that pcb_savefpu must be aligned to 16 bytes. |
| 54 | */ |
| 55 | struct pcb { |
| 56 | union savefpu pcb_savefpu; /* floating point state for FPU */ |
| 57 | int pcb_cr3; |
| 58 | int pcb_esp; |
| 59 | int pcb_ebp; |
| 60 | int pcb_kstack; /* kernel stack address */ |
| 61 | int pcb_cr0; /* saved image of CR0 */ |
| 62 | caddr_t pcb_onfault; /* copyin/out fault recovery */ |
| 63 | struct segment_descriptor pcb_threadsegs[2]; |
| 64 | /* per-thread descriptors */ |
| 65 | int vm86_eflags; /* virtual eflags for vm86 mode */ |
| 66 | int vm86_flagmask; /* flag mask for vm86 mode */ |
| 67 | void *vm86_userp; /* XXX performance hack */ |
| 68 | struct pmap *pcb_pmap; /* back pointer to our pmap */ |
| 69 | struct cpu_info *pcb_fpcpu; /* cpu holding our fpu state */ |
| 70 | int pcb_flags; |
| 71 | #define PCB_SAVECTX 0x00000001 |
| 72 | }; |
| 73 | |
| 74 | /* the indexes of the %fs/%gs segments in pcb_threadsegs */ |
| 75 | #define TSEG_FS 0 |
| 76 | #define TSEG_GS 1 |
| 77 | |
| 78 | #endif /* _MACHINE_PCB_H_ */ |