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 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * from: @(#)pcb.h 5.10 (Berkeley) 5/12/91 33 * $FreeBSD$ 34 */ 35 36 #ifndef _I386_PCB_H_ 37 #define _I386_PCB_H_ 38 39 /* 40 * Intel 386 process control block 41 */ 42 #ifndef _KERNEL 43 #include <machine/segments.h> 44 #endif 45 #include <machine/npx.h> 46 47 struct pcb { 48 int pcb_cr0; 49 int pcb_cr2; 50 int pcb_cr3; 51 int pcb_cr4; 52 int pcb_edi; 53 int pcb_esi; 54 int pcb_ebp; 55 int pcb_esp; 56 int pcb_ebx; 57 int pcb_eip; 58 59 int pcb_dr0; 60 int pcb_dr1; 61 int pcb_dr2; 62 int pcb_dr3; 63 int pcb_dr6; 64 int pcb_dr7; 65 66 union savefpu pcb_user_save; 67 uint16_t pcb_initial_npxcw; 68 u_int pcb_flags; 69 #define FP_SOFTFP 0x01 /* process using software fltng pnt emulator */ 70 #define PCB_DBREGS 0x02 /* process using debug registers */ 71 #define PCB_NPXINITDONE 0x08 /* fpu state is initialized */ 72 #define PCB_VM86CALL 0x10 /* in vm86 call */ 73 #define PCB_NPXUSERINITDONE 0x20 /* user fpu state is initialized */ 74 #define PCB_KERNNPX 0x40 /* kernel uses npx */ 75 76 caddr_t pcb_onfault; /* copyin/out fault recovery */ 77 int pcb_ds; 78 int pcb_es; 79 int pcb_fs; 80 int pcb_gs; 81 int pcb_ss; 82 struct segment_descriptor pcb_fsd; 83 struct segment_descriptor pcb_gsd; 84 struct pcb_ext *pcb_ext; /* optional pcb extension */ 85 int pcb_psl; /* process status long */ 86 u_long pcb_vm86[2]; /* vm86bios scratch space */ 87 union savefpu *pcb_save; 88 89 struct region_descriptor pcb_gdt; 90 struct region_descriptor pcb_idt; 91 uint16_t pcb_ldt; 92 uint16_t pcb_tr; 93 }; 94 95 struct susppcb { 96 struct pcb sp_pcb; 97 union savefpu sp_fpususpend; 98 }; 99 100 #ifdef _KERNEL 101 struct trapframe; 102 103 void makectx(struct trapframe *, struct pcb *); 104 int savectx(struct pcb *) __returns_twice; 105 void resumectx(struct pcb *) __fastcall; 106 #endif 107 108 #endif /* _I386_PCB_H_ */ 109