1 /* 2 * Copyright (c) 2008, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "runtime/os.hpp" 27 #include "runtime/vm_version.hpp" 28 29 # include <sys/utsname.h> 30 31 // Use uname() to find the architecture version 32 void VM_Version::get_os_cpu_info() { 33 struct utsname name; 34 static bool done = false; 35 36 // Support for multiple calls in the init phase 37 if (done) return; 38 done = true; 39 40 uname(&name); 41 if (strncmp(name.machine, "aarch64", 7) == 0) { 42 _arm_arch = 8; 43 } else if (strncmp(name.machine, "armv", 4) == 0 && 44 name.machine[4] >= '5' && name.machine[4] <= '9') { 45 _arm_arch = (int)(name.machine[4] - '0'); 46 } 47 } 48