Mercurial > hg > truffle
comparison src/cpu/x86/vm/icBuffer_x86.cpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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-1:000000000000 | 0:a61af66fc99e |
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1 /* | |
2 * Copyright 1997-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_icBuffer_x86.cpp.incl" | |
27 | |
28 int InlineCacheBuffer::ic_stub_code_size() { | |
29 return NativeMovConstReg::instruction_size + | |
30 NativeJump::instruction_size + | |
31 1; | |
32 // so that code_end can be set in CodeBuffer | |
33 // 64bit 16 = 5 + 10 bytes + 1 byte | |
34 // 32bit 11 = 10 bytes + 1 byte | |
35 } | |
36 | |
37 | |
38 | |
39 void InlineCacheBuffer::assemble_ic_buffer_code(address code_begin, oop cached_oop, address entry_point) { | |
40 ResourceMark rm; | |
41 CodeBuffer code(code_begin, ic_stub_code_size()); | |
42 MacroAssembler* masm = new MacroAssembler(&code); | |
43 // note: even though the code contains an embedded oop, we do not need reloc info | |
44 // because | |
45 // (1) the oop is old (i.e., doesn't matter for scavenges) | |
46 // (2) these ICStubs are removed *before* a GC happens, so the roots disappear | |
47 assert(cached_oop == NULL || cached_oop->is_perm(), "must be perm oop"); | |
48 masm->lea(rax, OopAddress((address) cached_oop)); | |
49 masm->jump(ExternalAddress(entry_point)); | |
50 } | |
51 | |
52 | |
53 address InlineCacheBuffer::ic_buffer_entry_point(address code_begin) { | |
54 NativeMovConstReg* move = nativeMovConstReg_at(code_begin); // creation also verifies the object | |
55 NativeJump* jump = nativeJump_at(move->next_instruction_address()); | |
56 return jump->jump_destination(); | |
57 } | |
58 | |
59 | |
60 oop InlineCacheBuffer::ic_buffer_cached_oop(address code_begin) { | |
61 // creation also verifies the object | |
62 NativeMovConstReg* move = nativeMovConstReg_at(code_begin); | |
63 // Verifies the jump | |
64 NativeJump* jump = nativeJump_at(move->next_instruction_address()); | |
65 return (oop)move->data(); | |
66 } |