1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */ 23*0Sstevel@tonic-gate /* All Rights Reserved */ 24*0Sstevel@tonic-gate 25*0Sstevel@tonic-gate 26*0Sstevel@tonic-gate /* 27*0Sstevel@tonic-gate * Copyright 1996-2003 Sun Microsystems, Inc. All rights reserved. 28*0Sstevel@tonic-gate * Use is subject to license terms. 29*0Sstevel@tonic-gate */ 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 32*0Sstevel@tonic-gate 33*0Sstevel@tonic-gate #pragma weak swapcontext = _swapcontext 34*0Sstevel@tonic-gate 35*0Sstevel@tonic-gate #include "synonyms.h" 36*0Sstevel@tonic-gate #include <ucontext.h> 37*0Sstevel@tonic-gate #include <sys/types.h> 38*0Sstevel@tonic-gate #include "libc.h" 39*0Sstevel@tonic-gate 40*0Sstevel@tonic-gate int 41*0Sstevel@tonic-gate swapcontext(ucontext_t *oucp, const ucontext_t *nucp) 42*0Sstevel@tonic-gate { 43*0Sstevel@tonic-gate greg_t *reg; 44*0Sstevel@tonic-gate 45*0Sstevel@tonic-gate if (__getcontext_syscall(oucp)) 46*0Sstevel@tonic-gate return (-1); 47*0Sstevel@tonic-gate 48*0Sstevel@tonic-gate /* 49*0Sstevel@tonic-gate * Note that %o1 and %g1 are modified by the system call 50*0Sstevel@tonic-gate * routine. ABI calling conventions specify that the caller 51*0Sstevel@tonic-gate * can not depend upon %o0 thru %o5 nor g1, so no effort is 52*0Sstevel@tonic-gate * made to maintain these registers. %o0 is forced to reflect 53*0Sstevel@tonic-gate * an affirmative return code. 54*0Sstevel@tonic-gate */ 55*0Sstevel@tonic-gate reg = oucp->uc_mcontext.gregs; 56*0Sstevel@tonic-gate reg[REG_SP] = getfp(); 57*0Sstevel@tonic-gate reg[REG_O7] = caller(); 58*0Sstevel@tonic-gate reg[REG_PC] = reg[REG_O7] + 8; 59*0Sstevel@tonic-gate reg[REG_nPC] = reg[REG_PC] + 4; 60*0Sstevel@tonic-gate reg[REG_O0] = 0; 61*0Sstevel@tonic-gate 62*0Sstevel@tonic-gate return (setcontext((ucontext_t *)nucp)); 63*0Sstevel@tonic-gate } 64