1 /*
2 * Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2014, Red Hat Inc. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #include "precompiled.hpp"
27 #include "asm/macroAssembler.hpp"
28 #include "code/relocInfo.hpp"
29 #include "nativeInst_aarch64.hpp"
30 #include "oops/oop.inline.hpp"
31 #include "runtime/safepoint.hpp"
32
33
pd_set_data_value(address x,intptr_t o,bool verify_only)34 void Relocation::pd_set_data_value(address x, intptr_t o, bool verify_only) {
35 if (verify_only)
36 return;
37
38 int bytes;
39
40 switch(type()) {
41 case relocInfo::oop_type:
42 {
43 oop_Relocation *reloc = (oop_Relocation *)this;
44 if (NativeInstruction::is_ldr_literal_at(addr())) {
45 address constptr = (address)code()->oop_addr_at(reloc->oop_index());
46 bytes = MacroAssembler::pd_patch_instruction_size(addr(), constptr);
47 assert(*(address*)constptr == x, "error in oop relocation");
48 } else{
49 bytes = MacroAssembler::patch_oop(addr(), x);
50 }
51 }
52 break;
53 default:
54 bytes = MacroAssembler::pd_patch_instruction_size(addr(), x);
55 break;
56 }
57 ICache::invalidate_range(addr(), bytes);
58 }
59
pd_call_destination(address orig_addr)60 address Relocation::pd_call_destination(address orig_addr) {
61 assert(is_call(), "should be a call here");
62 if (NativeCall::is_call_at(addr())) {
63 address trampoline = nativeCall_at(addr())->get_trampoline();
64 if (trampoline) {
65 return nativeCallTrampolineStub_at(trampoline)->destination();
66 }
67 }
68 if (orig_addr != NULL) {
69 address new_addr = MacroAssembler::pd_call_destination(orig_addr);
70 // If call is branch to self, don't try to relocate it, just leave it
71 // as branch to self. This happens during code generation if the code
72 // buffer expands. It will be relocated to the trampoline above once
73 // code generation is complete.
74 new_addr = (new_addr == orig_addr) ? addr() : new_addr;
75 return new_addr;
76 }
77 return MacroAssembler::pd_call_destination(addr());
78 }
79
80
pd_set_call_destination(address x)81 void Relocation::pd_set_call_destination(address x) {
82 assert(is_call(), "should be a call here");
83 if (NativeCall::is_call_at(addr())) {
84 address trampoline = nativeCall_at(addr())->get_trampoline();
85 if (trampoline) {
86 nativeCall_at(addr())->set_destination_mt_safe(x, /* assert_lock */false);
87 return;
88 }
89 }
90 MacroAssembler::pd_patch_instruction(addr(), x);
91 assert(pd_call_destination(addr()) == x, "fail in reloc");
92 }
93
pd_address_in_code()94 address* Relocation::pd_address_in_code() {
95 return (address*)(addr() + 8);
96 }
97
98
pd_get_address_from_code()99 address Relocation::pd_get_address_from_code() {
100 return MacroAssembler::pd_call_destination(addr());
101 }
102
fix_relocation_after_move(const CodeBuffer * src,CodeBuffer * dest)103 void poll_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {
104 if (NativeInstruction::maybe_cpool_ref(addr())) {
105 address old_addr = old_addr_for(addr(), src, dest);
106 MacroAssembler::pd_patch_instruction(addr(), MacroAssembler::target_addr_for_insn(old_addr));
107 }
108 }
109
pd_fix_value(address x)110 void metadata_Relocation::pd_fix_value(address x) {
111 }
112