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comparison src/cpu/x86/vm/assembler_x86_64.inline.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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1 /*
2 * Copyright 2003-2005 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 inline void Assembler::emit_long64(jlong x) {
26 *(jlong*) _code_pos = x;
27 _code_pos += sizeof(jlong);
28 code_section()->set_end(_code_pos);
29 }
30
31 inline void MacroAssembler::pd_patch_instruction(address branch, address target) {
32 unsigned char op = branch[0];
33 assert(op == 0xE8 /* call */ ||
34 op == 0xE9 /* jmp */ ||
35 op == 0xEB /* short jmp */ ||
36 (op & 0xF0) == 0x70 /* short jcc */ ||
37 op == 0x0F && (branch[1] & 0xF0) == 0x80 /* jcc */,
38 "Invalid opcode at patch point");
39
40 if (op == 0xEB || (op & 0xF0) == 0x70) {
41 // short offset operators (jmp and jcc)
42 char* disp = (char*) &branch[1];
43 int imm8 = target - (address) &disp[1];
44 guarantee(this->is8bit(imm8), "Short forward jump exceeds 8-bit offset");
45 *disp = imm8;
46 } else {
47 int* disp = (int*) &branch[(op == 0x0F)? 2: 1];
48 int imm32 = target - (address) &disp[1];
49 *disp = imm32;
50 }
51 }
52
53 #ifndef PRODUCT
54 inline void MacroAssembler::pd_print_patched_instruction(address branch) {
55 const char* s;
56 unsigned char op = branch[0];
57 if (op == 0xE8) {
58 s = "call";
59 } else if (op == 0xE9 || op == 0xEB) {
60 s = "jmp";
61 } else if ((op & 0xF0) == 0x70) {
62 s = "jcc";
63 } else if (op == 0x0F) {
64 s = "jcc";
65 } else {
66 s = "????";
67 }
68 tty->print("%s (unresolved)", s);
69 }
70 #endif // ndef PRODUCT
71
72 inline void MacroAssembler::movptr(Address dst, intptr_t src) {
73 #ifdef _LP64
74 Assembler::mov64(dst, src);
75 #else
76 Assembler::movl(dst, src);
77 #endif // _LP64
78 }
79
80 inline void MacroAssembler::movptr(Register dst, intptr_t src) {
81 #ifdef _LP64
82 Assembler::mov64(dst, src);
83 #else
84 Assembler::movl(dst, src);
85 #endif // _LP64
86 }