1 #ifdef USE_PRAGMA_IDENT_SRC
2 #pragma ident "@(#)dump_x86_64.cpp 1.13 07/09/17 09:25:59 JVM"
3 #endif
4 /*
5 * Copyright 2004-2007 Sun Microsystems, Inc. All Rights Reserved.
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
7 *
8 * This code is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 only, as
10 * published by the Free Software Foundation.
11 *
12 * This code is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 * version 2 for more details (a copy is included in the LICENSE file that
16 * accompanied this code).
17 *
18 * You should have received a copy of the GNU General Public License version
19 * 2 along with this work; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
21 *
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
24 * have any questions.
25 *
76 Label common_code;
77 for (int i = 0; i < vtbl_list_size; ++i) {
78 for (int j = 0; j < num_virtuals; ++j) {
79 dummy_vtable[num_virtuals * i + j] = (void*)masm->pc();
80
81 // Load eax with a value indicating vtable/offset pair.
82 // -- bits[ 7..0] (8 bits) which virtual method in table?
83 // -- bits[12..8] (5 bits) which virtual method table?
84 // -- must fit in 13-bit instruction immediate field.
85 __ movl(rax, (i << 8) + j);
86 __ jmp(common_code);
87 }
88 }
89
90 __ bind(common_code);
91
92 // Expecting to be called with "thiscall" convections -- the arguments
93 // are on the stack and the "this" pointer is in c_rarg0. In addition, rax
94 // was set (above) to the offset of the method in the table.
95
96 __ pushq(c_rarg1); // save & free register
97 __ pushq(c_rarg0); // save "this"
98 __ movq(c_rarg0, rax);
99 __ shrq(c_rarg0, 8); // isolate vtable identifier.
100 __ shlq(c_rarg0, LogBytesPerWord);
101 __ lea(c_rarg1, ExternalAddress((address)vtbl_list)); // ptr to correct vtable list.
102 __ addq(c_rarg1, c_rarg0); // ptr to list entry.
103 __ movq(c_rarg1, Address(c_rarg1, 0)); // get correct vtable address.
104 __ popq(c_rarg0); // restore "this"
105 __ movq(Address(c_rarg0, 0), c_rarg1); // update vtable pointer.
106
107 __ andq(rax, 0x00ff); // isolate vtable method index
108 __ shlq(rax, LogBytesPerWord);
109 __ addq(rax, c_rarg1); // address of real method pointer.
110 __ popq(c_rarg1); // restore register.
111 __ movq(rax, Address(rax, 0)); // get real method pointer.
112 __ jmp(rax); // jump to the real method.
113
114 __ flush();
115
116 *mc_top = (char*)__ pc();
117 }
118
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1 /*
2 * Copyright 2004-2008 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 *
73 Label common_code;
74 for (int i = 0; i < vtbl_list_size; ++i) {
75 for (int j = 0; j < num_virtuals; ++j) {
76 dummy_vtable[num_virtuals * i + j] = (void*)masm->pc();
77
78 // Load eax with a value indicating vtable/offset pair.
79 // -- bits[ 7..0] (8 bits) which virtual method in table?
80 // -- bits[12..8] (5 bits) which virtual method table?
81 // -- must fit in 13-bit instruction immediate field.
82 __ movl(rax, (i << 8) + j);
83 __ jmp(common_code);
84 }
85 }
86
87 __ bind(common_code);
88
89 // Expecting to be called with "thiscall" convections -- the arguments
90 // are on the stack and the "this" pointer is in c_rarg0. In addition, rax
91 // was set (above) to the offset of the method in the table.
92
93 __ push(c_rarg1); // save & free register
94 __ push(c_rarg0); // save "this"
95 __ mov(c_rarg0, rax);
96 __ shrptr(c_rarg0, 8); // isolate vtable identifier.
97 __ shlptr(c_rarg0, LogBytesPerWord);
98 __ lea(c_rarg1, ExternalAddress((address)vtbl_list)); // ptr to correct vtable list.
99 __ addptr(c_rarg1, c_rarg0); // ptr to list entry.
100 __ movptr(c_rarg1, Address(c_rarg1, 0)); // get correct vtable address.
101 __ pop(c_rarg0); // restore "this"
102 __ movptr(Address(c_rarg0, 0), c_rarg1); // update vtable pointer.
103
104 __ andptr(rax, 0x00ff); // isolate vtable method index
105 __ shlptr(rax, LogBytesPerWord);
106 __ addptr(rax, c_rarg1); // address of real method pointer.
107 __ pop(c_rarg1); // restore register.
108 __ movptr(rax, Address(rax, 0)); // get real method pointer.
109 __ jmp(rax); // jump to the real method.
110
111 __ flush();
112
113 *mc_top = (char*)__ pc();
114 }
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