1 /*
2 * Copyright (c) 1998, 2013, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "asm/macroAssembler.hpp"
27 #include "code/relocInfo.hpp"
28 #include "nativeInst_x86.hpp"
29 #include "oops/klass.inline.hpp"
30 #include "oops/oop.inline.hpp"
31 #include "runtime/safepoint.hpp"
32
33
34 void Relocation::pd_set_data_value(address x, intptr_t o, bool verify_only) {
35 #ifdef AMD64
36 x += o;
37 typedef Assembler::WhichOperand WhichOperand;
38 WhichOperand which = (WhichOperand) format(); // that is, disp32 or imm, call32, narrow oop
39 assert(which == Assembler::disp32_operand ||
40 which == Assembler::narrow_oop_operand ||
41 which == Assembler::imm_operand, "format unpacks ok");
42 if (which == Assembler::imm_operand) {
43 if (verify_only) {
44 guarantee(*pd_address_in_code() == x, "instructions must match");
45 } else {
46 *pd_address_in_code() = x;
47 }
48 } else if (which == Assembler::narrow_oop_operand) {
49 address disp = Assembler::locate_operand(addr(), which);
50 // both compressed oops and compressed classes look the same
51 if (Universe::heap()->is_in_reserved((oop)x)) {
166 WhichOperand which = (WhichOperand) format(); // that is, disp32 or imm/imm32
167 assert(which == Assembler::disp32_operand ||
168 which == Assembler::call32_operand ||
169 which == Assembler::imm_operand, "format unpacks ok");
170 if (which != Assembler::imm_operand) {
171 address ip = addr();
172 address disp = Assembler::locate_operand(ip, which);
173 address next_ip = Assembler::locate_next_instruction(ip);
174 address a = next_ip + *(int32_t*) disp;
175 return a;
176 }
177 #endif // AMD64
178 return *pd_address_in_code();
179 }
180
181 void poll_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {
182 #ifdef _LP64
183 typedef Assembler::WhichOperand WhichOperand;
184 WhichOperand which = (WhichOperand) format();
185 #if !INCLUDE_JVMCI
186 assert((which == Assembler::disp32_operand) == !Assembler::is_polling_page_far(), "format not set correctly");
187 #endif
188 if (which == Assembler::disp32_operand) {
189 address orig_addr = old_addr_for(addr(), src, dest);
190 NativeInstruction* oni = nativeInstruction_at(orig_addr);
191 int32_t* orig_disp = (int32_t*) Assembler::locate_operand(orig_addr, which);
192 // This poll_addr is incorrect by the size of the instruction it is irrelevant
193 intptr_t poll_addr = (intptr_t)oni + *orig_disp;
194 NativeInstruction* ni = nativeInstruction_at(addr());
195 intptr_t new_disp = poll_addr - (intptr_t) ni;
196
197 int32_t* disp = (int32_t*) Assembler::locate_operand(addr(), which);
198 * disp = (int32_t)new_disp;
199 }
200 #endif // _LP64
201 }
202
203 void metadata_Relocation::pd_fix_value(address x) {
204 }
|
1 /*
2 * Copyright (c) 1998, 2017, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "asm/macroAssembler.hpp"
27 #include "code/relocInfo.hpp"
28 #include "nativeInst_x86.hpp"
29 #include "oops/klass.inline.hpp"
30 #include "oops/oop.inline.hpp"
31 #include "runtime/safepoint.hpp"
32 #include "runtime/safepointMechanism.hpp"
33
34
35 void Relocation::pd_set_data_value(address x, intptr_t o, bool verify_only) {
36 #ifdef AMD64
37 x += o;
38 typedef Assembler::WhichOperand WhichOperand;
39 WhichOperand which = (WhichOperand) format(); // that is, disp32 or imm, call32, narrow oop
40 assert(which == Assembler::disp32_operand ||
41 which == Assembler::narrow_oop_operand ||
42 which == Assembler::imm_operand, "format unpacks ok");
43 if (which == Assembler::imm_operand) {
44 if (verify_only) {
45 guarantee(*pd_address_in_code() == x, "instructions must match");
46 } else {
47 *pd_address_in_code() = x;
48 }
49 } else if (which == Assembler::narrow_oop_operand) {
50 address disp = Assembler::locate_operand(addr(), which);
51 // both compressed oops and compressed classes look the same
52 if (Universe::heap()->is_in_reserved((oop)x)) {
167 WhichOperand which = (WhichOperand) format(); // that is, disp32 or imm/imm32
168 assert(which == Assembler::disp32_operand ||
169 which == Assembler::call32_operand ||
170 which == Assembler::imm_operand, "format unpacks ok");
171 if (which != Assembler::imm_operand) {
172 address ip = addr();
173 address disp = Assembler::locate_operand(ip, which);
174 address next_ip = Assembler::locate_next_instruction(ip);
175 address a = next_ip + *(int32_t*) disp;
176 return a;
177 }
178 #endif // AMD64
179 return *pd_address_in_code();
180 }
181
182 void poll_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {
183 #ifdef _LP64
184 typedef Assembler::WhichOperand WhichOperand;
185 WhichOperand which = (WhichOperand) format();
186 #if !INCLUDE_JVMCI
187 if (SafepointMechanism::uses_global_page_poll()) {
188 assert((which == Assembler::disp32_operand) == !Assembler::is_polling_page_far(), "format not set correctly");
189 }
190 #endif
191 if (which == Assembler::disp32_operand) {
192 assert(SafepointMechanism::uses_global_page_poll(), "should only have generated such a poll if global polling enabled");
193 address orig_addr = old_addr_for(addr(), src, dest);
194 NativeInstruction* oni = nativeInstruction_at(orig_addr);
195 int32_t* orig_disp = (int32_t*) Assembler::locate_operand(orig_addr, which);
196 // This poll_addr is incorrect by the size of the instruction it is irrelevant
197 intptr_t poll_addr = (intptr_t)oni + *orig_disp;
198 NativeInstruction* ni = nativeInstruction_at(addr());
199 intptr_t new_disp = poll_addr - (intptr_t) ni;
200
201 int32_t* disp = (int32_t*) Assembler::locate_operand(addr(), which);
202 * disp = (int32_t)new_disp;
203 }
204 #endif // _LP64
205 }
206
207 void metadata_Relocation::pd_fix_value(address x) {
208 }
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