Mercurial > jdk8-mips64-public > hotspot / annotate
src/os_cpu/linux_x86/vm/os_linux_x86.hpp@f90c822e73f8 (annotated)
src/os_cpu/linux_x86/vm/os_linux_x86.hpp
Wed, 27 Apr 2016 01:25:04 +0800
- author
- aoqi
- date
- Wed, 27 Apr 2016 01:25:04 +0800
- changeset 0
- f90c822e73f8
- child 6876
- 710a3c8b516e
- permissions
- -rw-r--r--
Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| aoqi@0 | 4 | * |
| aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
| aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| aoqi@0 | 7 | * published by the Free Software Foundation. |
| aoqi@0 | 8 | * |
| aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| aoqi@0 | 13 | * accompanied this code). |
| aoqi@0 | 14 | * |
| aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
| aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| aoqi@0 | 18 | * |
| aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
| aoqi@0 | 21 | * questions. |
| aoqi@0 | 22 | * |
| aoqi@0 | 23 | */ |
| aoqi@0 | 24 | |
| aoqi@0 | 25 | #ifndef OS_CPU_LINUX_X86_VM_OS_LINUX_X86_HPP |
| aoqi@0 | 26 | #define OS_CPU_LINUX_X86_VM_OS_LINUX_X86_HPP |
| aoqi@0 | 27 | |
| aoqi@0 | 28 | static void setup_fpu(); |
| aoqi@0 | 29 | static bool supports_sse(); |
| aoqi@0 | 30 | |
| aoqi@0 | 31 | static jlong rdtsc(); |
| aoqi@0 | 32 | |
| aoqi@0 | 33 | static bool is_allocatable(size_t bytes); |
| aoqi@0 | 34 | |
| aoqi@0 | 35 | // Used to register dynamic code cache area with the OS |
| aoqi@0 | 36 | // Note: Currently only used in 64 bit Windows implementations |
| aoqi@0 | 37 | static bool register_code_area(char *low, char *high) { return true; } |
| aoqi@0 | 38 | |
| aoqi@0 | 39 | /* |
| aoqi@0 | 40 | * Work-around for broken NX emulation using CS limit, Red Hat patch "Exec-Shield" |
| aoqi@0 | 41 | * (IA32 only). |
| aoqi@0 | 42 | * |
| aoqi@0 | 43 | * Map and execute at a high VA to prevent CS lazy updates race with SMP MM |
| aoqi@0 | 44 | * invalidation.Further code generation by the JVM will no longer cause CS limit |
| aoqi@0 | 45 | * updates. |
| aoqi@0 | 46 | * |
| aoqi@0 | 47 | * Affects IA32: RHEL 5 & 6, Ubuntu 10.04 (LTS), 10.10, 11.04, 11.10, 12.04. |
| aoqi@0 | 48 | * @see JDK-8023956 |
| aoqi@0 | 49 | */ |
| aoqi@0 | 50 | static void workaround_expand_exec_shield_cs_limit(); |
| aoqi@0 | 51 | |
| aoqi@0 | 52 | #endif // OS_CPU_LINUX_X86_VM_OS_LINUX_X86_HPP |
