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 (c) 1988 AT&T */ 24 /* All Rights Reserved */ 25 26 /* 27 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 28 * Use is subject to license terms. 29 */ 30 31 #pragma ident "%Z%%M% %I% %E% SMI" 32 33 #pragma weak _private_getcontext = _getcontext 34 #pragma weak getcontext = _getcontext 35 36 #include "synonyms.h" 37 #include "thr_uberdata.h" 38 #include <ucontext.h> 39 #include <sys/types.h> 40 41 int 42 getcontext(ucontext_t *ucp) 43 { 44 greg_t *reg; 45 46 ucp->uc_flags = UC_ALL; 47 if (__getcontext_syscall(ucp)) 48 return (-1); 49 50 /* 51 * Note that %o1 and %g1 are modified by the system call 52 * routine. ABI calling conventions specify that the caller 53 * cannot depend upon %o0 through %o5 nor %g1, so no effort is 54 * made to maintain these registers. %o0 is forced to reflect 55 * an affirmative return code. 56 */ 57 reg = ucp->uc_mcontext.gregs; 58 reg[REG_SP] = getfp(); 59 reg[REG_O7] = caller(); 60 reg[REG_PC] = reg[REG_O7] + 8; 61 reg[REG_nPC] = reg[REG_PC] + 4; 62 reg[REG_O0] = 0; 63 64 return (0); 65 } 66