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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 /* 27 * Copyright (c) 2012, Joyent, Inc. All rights reserved. 28 */ 29 30 #pragma weak _getisax = getisax 31 32 #include "lint.h" 33 #include <sys/types.h> 34 #include <sys/auxv.h> 35 36 extern long ___getauxval(int type); 37 38 /* 39 * Return the 'hwcap' vector of bits in the AT_SUN_HWCAP and AT_SUN_HWCAP2 aux 40 * vector entries. Therefore there are two words of bits here. 41 * 42 * As a convenience, the routine returns the maximum number of array alements 43 * that may contain non-zero values. 44 */ 45 uint_t 46 getisax(uint32_t *array, uint_t n) 47 { 48 int i; 49 static uint32_t auxv_hwcap; 50 static uint32_t auxv_hwcap_2; 51 52 if (auxv_hwcap == 0) { 53 auxv_hwcap = (uint32_t)___getauxval(AT_SUN_HWCAP); 54 auxv_hwcap_2 = (uint32_t)___getauxval(AT_SUN_HWCAP2); 55 } 56 57 if (n > 0) { 58 if (n >= 1) 59 array[0] = auxv_hwcap; 60 if (n >= 2) 61 array[1] = auxv_hwcap_2; 62 for (i = 2; i < n; i++) 63 array[i] = 0; 64 } 65 66 return (auxv_hwcap == 0 ? 0 : n >= 2 ? 2 : 1); 67 } 68