Mercurial > jdk8-mips64-public > hotspot / annotate
src/os_cpu/windows_x86/vm/assembler_windows_x86.cpp@f90c822e73f8 (annotated)
src/os_cpu/windows_x86/vm/assembler_windows_x86.cpp
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, 2010, 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 | #include "precompiled.hpp" |
| aoqi@0 | 26 | #include "asm/macroAssembler.hpp" |
| aoqi@0 | 27 | #include "asm/macroAssembler.inline.hpp" |
| aoqi@0 | 28 | #include "runtime/os.hpp" |
| aoqi@0 | 29 | #include "runtime/threadLocalStorage.hpp" |
| aoqi@0 | 30 | |
| aoqi@0 | 31 | |
| aoqi@0 | 32 | void MacroAssembler::int3() { |
| aoqi@0 | 33 | emit_int8((unsigned char)0xCC); |
| aoqi@0 | 34 | } |
| aoqi@0 | 35 | |
| aoqi@0 | 36 | #ifndef _LP64 |
| aoqi@0 | 37 | // The current scheme to accelerate access to the thread |
| aoqi@0 | 38 | // pointer is to store the current thread in the os_exception_wrapper |
| aoqi@0 | 39 | // and reference the current thread from stubs and compiled code |
| aoqi@0 | 40 | // via the FS register. FS[0] contains a pointer to the structured |
| aoqi@0 | 41 | // exception block which is actually a stack address. The first time |
| aoqi@0 | 42 | // we call the os exception wrapper, we calculate and store the |
| aoqi@0 | 43 | // offset from this exception block and use that offset here. |
| aoqi@0 | 44 | // |
| aoqi@0 | 45 | // The last mechanism we used was problematic in that the |
| aoqi@0 | 46 | // the offset we had hard coded in the VM kept changing as Microsoft |
| aoqi@0 | 47 | // evolved the OS. |
| aoqi@0 | 48 | // |
| aoqi@0 | 49 | // Warning: This mechanism assumes that we only attempt to get the |
| aoqi@0 | 50 | // thread when we are nested below a call wrapper. |
| aoqi@0 | 51 | // |
| aoqi@0 | 52 | // movl reg, fs:[0] Get exeception pointer |
| aoqi@0 | 53 | // movl reg, [reg + thread_ptr_offset] Load thread |
| aoqi@0 | 54 | // |
| aoqi@0 | 55 | void MacroAssembler::get_thread(Register thread) { |
| aoqi@0 | 56 | // can't use ExternalAddress because it can't take NULL |
| aoqi@0 | 57 | AddressLiteral null(0, relocInfo::none); |
| aoqi@0 | 58 | |
| aoqi@0 | 59 | prefix(FS_segment); |
| aoqi@0 | 60 | movptr(thread, null); |
| aoqi@0 | 61 | assert(ThreadLocalStorage::get_thread_ptr_offset() != 0, |
| aoqi@0 | 62 | "Thread Pointer Offset has not been initialized"); |
| aoqi@0 | 63 | movl(thread, Address(thread, ThreadLocalStorage::get_thread_ptr_offset())); |
| aoqi@0 | 64 | } |
| aoqi@0 | 65 | #else |
| aoqi@0 | 66 | // call (Thread*)TlsGetValue(thread_index()); |
| aoqi@0 | 67 | void MacroAssembler::get_thread(Register thread) { |
| aoqi@0 | 68 | if (thread != rax) { |
| aoqi@0 | 69 | push(rax); |
| aoqi@0 | 70 | } |
| aoqi@0 | 71 | push(rdi); |
| aoqi@0 | 72 | push(rsi); |
| aoqi@0 | 73 | push(rdx); |
| aoqi@0 | 74 | push(rcx); |
| aoqi@0 | 75 | push(r8); |
| aoqi@0 | 76 | push(r9); |
| aoqi@0 | 77 | push(r10); |
| aoqi@0 | 78 | // XXX |
| aoqi@0 | 79 | mov(r10, rsp); |
| aoqi@0 | 80 | andq(rsp, -16); |
| aoqi@0 | 81 | push(r10); |
| aoqi@0 | 82 | push(r11); |
| aoqi@0 | 83 | |
| aoqi@0 | 84 | movl(c_rarg0, ThreadLocalStorage::thread_index()); |
| aoqi@0 | 85 | call(RuntimeAddress((address)TlsGetValue)); |
| aoqi@0 | 86 | |
| aoqi@0 | 87 | pop(r11); |
| aoqi@0 | 88 | pop(rsp); |
| aoqi@0 | 89 | pop(r10); |
| aoqi@0 | 90 | pop(r9); |
| aoqi@0 | 91 | pop(r8); |
| aoqi@0 | 92 | pop(rcx); |
| aoqi@0 | 93 | pop(rdx); |
| aoqi@0 | 94 | pop(rsi); |
| aoqi@0 | 95 | pop(rdi); |
| aoqi@0 | 96 | if (thread != rax) { |
| aoqi@0 | 97 | mov(thread, rax); |
| aoqi@0 | 98 | pop(rax); |
| aoqi@0 | 99 | } |
| aoqi@0 | 100 | } |
| aoqi@0 | 101 | #endif |
