1 /* $NetBSD: pcb.h,v 1.17 2012/01/14 17:42:51 reinoud Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 Jared D. McNeill <jmcneill@invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef _ARCH_USERMODE_INCLUDE_PCB_H 30 #define _ARCH_USERMODE_INCLUDE_PCB_H 31 32 #include <sys/cdefs.h> 33 #include <sys/ucontext.h> 34 #include <sys/queue.h> 35 36 37 #define TRAPSTACKSIZE (USPACE -2*sizeof(ucontext_t) - 3*sizeof(register_t)) 38 struct pcb { 39 ucontext_t pcb_ucp; /* switchframe */ 40 ucontext_t pcb_userret_ucp; 41 42 uint8_t *sys_stack_top; /* points at free point in sys_stack */ 43 uint8_t sys_stack[TRAPSTACKSIZE]; 44 45 void *pcb_onfault; /* on fault handler */ 46 47 int pcb_errno; /* save/restore place */ 48 }; 49 50 #endif /* !_ARCH_USERMODE_INCLUDE_PCB_H */ 51