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 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. 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 * from: @(#)pcb.h 5.10 (Berkeley) 5/12/91 37 * $Id: pcb.h,v 1.7 1994/10/08 22:21:33 phk Exp $ 38 */ 39 40 #ifndef _I386_PCB_H_ 41 #define _I386_PCB_H_ 42 43 /* 44 * Intel 386 process control block 45 */ 46 #include <machine/tss.h> 47 #include <machine/npx.h> 48 49 struct pcb { 50 struct i386tss pcb_tss; 51 #define pcb_ksp pcb_tss.tss_esp0 52 #define pcb_ptd pcb_tss.tss_cr3 53 #define pcb_cr3 pcb_ptd 54 #define pcb_pc pcb_tss.tss_eip 55 #define pcb_psl pcb_tss.tss_eflags 56 #define pcb_usp pcb_tss.tss_esp 57 #define pcb_fp pcb_tss.tss_ebp 58 #ifdef notyet 59 u_char pcb_iomap[NPORT/sizeof(u_char)]; /* i/o port bitmap */ 60 #endif 61 caddr_t pcb_ldt; /* per process (user) LDT */ 62 int pcb_ldt_len; /* number of LDT entries */ 63 struct save87 pcb_savefpu; /* floating point state for 287/387 */ 64 struct emcsts pcb_saveemc; /* Cyrix EMC state */ 65 /* 66 * Software pcb (extension) 67 */ 68 int pcb_flags; 69 #ifdef notused 70 #define FP_WASUSED 0x01 /* process has used fltng pnt hardware */ 71 #define FP_NEEDSSAVE 0x02 /* ... that needs save on next context switch */ 72 #define FP_NEEDSRESTORE 0x04 /* ... that needs restore on next DNA fault */ 73 #endif 74 #define FP_USESEMC 0x08 /* process uses EMC memory-mapped mode */ 75 #define FP_SOFTFP 0x20 /* process using software fltng pnt emulator */ 76 u_char pcb_inl; /* intr_nesting_level at context switch */ 77 caddr_t pcb_onfault; /* copyin/out fault recovery */ 78 long pcb_sigc[8]; /* XXX signal code trampoline */ 79 int pad2; /* XXX unused - remove it if you change struct */ 80 }; 81 82 /* 83 * The pcb is augmented with machine-dependent additional data for 84 * core dumps. For the i386: ??? 85 */ 86 struct md_coredump { 87 }; 88 89 #ifdef KERNEL 90 extern struct pcb *curpcb; /* our current running pcb */ 91 int savectx __P((struct pcb*,int)); 92 #endif 93 94 #endif /* _I386_PCB_H_ */ 95