1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* 28 * Context-saving routine used for pipelines. Designed for use only 29 * with kmdb_setcontext. 30 */ 31 32 #include <strings.h> 33 #include <ucontext.h> 34 #include <sys/types.h> 35 #include <sys/stack.h> 36 37 #include <kmdb/kmdb_context_impl.h> 38 #include <mdb/mdb_kreg.h> 39 40 void 41 kmdb_makecontext(ucontext_t *ucp, void (*func)(void *), void *arg, caddr_t stk, 42 size_t stksize) 43 { 44 uintptr_t *stack = (uintptr_t *)(((uintptr_t)stk + stksize - 1) & 45 ~(STACK_ALIGN - 1)); 46 47 *stack-- = 0; 48 49 ucp->uc_mcontext.gregs[REG_PC] = (greg_t)func; 50 ucp->uc_mcontext.gregs[REG_SP] = (greg_t)stack; 51 ucp->uc_mcontext.gregs[REG_RDI] = (greg_t)arg; 52 } 53