17c478bd9Sstevel@tonic-gate/* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5883492d5Sraf * Common Development and Distribution License (the "License"). 6883492d5Sraf * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 21883492d5Sraf 227c478bd9Sstevel@tonic-gate/* 238cd45542Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 247c478bd9Sstevel@tonic-gate * Use is subject to license terms. 257c478bd9Sstevel@tonic-gate */ 267c478bd9Sstevel@tonic-gate 279a70fc3bSMark J. Nelson .file "_lwp_mutex_unlock.s" 287c478bd9Sstevel@tonic-gate 297c478bd9Sstevel@tonic-gate#include "SYS.h" 307257d1b4Sraf#include <../assym.h> 317c478bd9Sstevel@tonic-gate 327c478bd9Sstevel@tonic-gate ENTRY(_lwp_mutex_unlock) 337c478bd9Sstevel@tonic-gate movl 4(%esp), %eax 347c478bd9Sstevel@tonic-gate addl $MUTEX_LOCK_WORD, %eax 357c478bd9Sstevel@tonic-gate xorl %ecx, %ecx 367c478bd9Sstevel@tonic-gate xchgl (%eax), %ecx / clear lock and get old lock into %ecx 377c478bd9Sstevel@tonic-gate andl $WAITER_MASK, %ecx / was anyone waiting on it? 387c478bd9Sstevel@tonic-gate je 1f 39883492d5Sraf movl 0(%esp), %ecx / prepare to call lwp_mutex_wakeup() 40883492d5Sraf movl 4(%esp), %edx 41883492d5Sraf movl $0, 4(%esp) 42883492d5Sraf movl %edx, 0(%esp) 43883492d5Sraf pushl %ecx 44883492d5Sraf SYSTRAP_RVAL1(lwp_mutex_wakeup) / lwp_mutex_wakeup(mp, 0) 45883492d5Sraf popl %ecx / reconstruct the stack frame 46883492d5Sraf movl 0(%esp), %edx 47883492d5Sraf movl %edx, 4(%esp) 48883492d5Sraf movl %ecx, 0(%esp) 497c478bd9Sstevel@tonic-gate SYSLWPERR 507c478bd9Sstevel@tonic-gate RET 517c478bd9Sstevel@tonic-gate1: 527c478bd9Sstevel@tonic-gate RETC 537c478bd9Sstevel@tonic-gate SET_SIZE(_lwp_mutex_unlock) 54