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/assembler.hpp"
27 #include "code/relocInfo.hpp"
28 #include "nativeInst_sparc.hpp"
29 #include "oops/klass.inline.hpp"
30 #include "oops/oop.inline.hpp"
31 #include "runtime/safepoint.hpp"
32
33 void Relocation::pd_set_data_value(address x, intptr_t o, bool verify_only) {
34 NativeInstruction* ip = nativeInstruction_at(addr());
35 jint inst = ip->long_at(0);
36 assert(inst != NativeInstruction::illegal_instruction(), "no breakpoint");
37 switch (Assembler::inv_op(inst)) {
38
39 case Assembler::ldst_op:
40 #ifdef ASSERT
41 switch (Assembler::inv_op3(inst)) {
42 case Assembler::lduw_op3:
43 case Assembler::ldub_op3:
44 case Assembler::lduh_op3:
45 case Assembler::ldd_op3:
46 case Assembler::ldsw_op3:
47 case Assembler::ldsb_op3:
48 case Assembler::ldsh_op3:
49 case Assembler::ldx_op3:
50 case Assembler::ldf_op3:
51 case Assembler::lddf_op3:
52 case Assembler::stw_op3:
53 case Assembler::stb_op3:
54 case Assembler::sth_op3:
55 case Assembler::std_op3:
56 case Assembler::stx_op3:
57 case Assembler::stf_op3:
58 case Assembler::stdf_op3:
59 case Assembler::casa_op3:
60 case Assembler::casxa_op3:
61 break;
62 default:
63 ShouldNotReachHere();
64 }
65 goto do_non_sethi;
66 #endif
67
68 case Assembler::arith_op:
69 #ifdef ASSERT
70 switch (Assembler::inv_op3(inst)) {
71 case Assembler::or_op3:
72 case Assembler::add_op3:
73 case Assembler::jmpl_op3:
74 break;
75 default:
76 ShouldNotReachHere();
77 }
78 do_non_sethi:;
79 #endif
80 {
81 guarantee(Assembler::inv_immed(inst), "must have a simm13 field");
82 int simm13 = Assembler::low10((intptr_t)x) + o;
83 guarantee(Assembler::is_simm13(simm13), "offset can't overflow simm13");
84 inst &= ~Assembler::simm( -1, 13);
85 inst |= Assembler::simm(simm13, 13);
86 if (verify_only) {
87 guarantee(ip->long_at(0) == inst, "instructions must match");
88 } else {
89 ip->set_long_at(0, inst);
90 }
91 }
92 break;
93
94 case Assembler::branch_op:
95 {
96 jint inst2;
97 guarantee(Assembler::inv_op2(inst)==Assembler::sethi_op2, "must be sethi");
98 if (format() != 0) {
99 assert(type() == relocInfo::oop_type || type() == relocInfo::metadata_type, "only narrow oops or klasses case");
100 jint np = type() == relocInfo::oop_type ? oopDesc::encode_heap_oop((oop)x) : Klass::encode_klass((Klass*)x);
101 inst &= ~Assembler::hi22(-1);
102 inst |= Assembler::hi22((intptr_t)np);
103 if (verify_only) {
104 guarantee(ip->long_at(0) == inst, "instructions must match");
105 } else {
106 ip->set_long_at(0, inst);
107 }
108 inst2 = ip->long_at( NativeInstruction::nop_instruction_size );
109 guarantee(Assembler::inv_op(inst2)==Assembler::arith_op, "arith op");
110 if (verify_only) {
111 guarantee(ip->long_at(NativeInstruction::nop_instruction_size) == NativeInstruction::set_data32_simm13( inst2, (intptr_t)np),
112 "instructions must match");
113 } else {
114 ip->set_long_at(NativeInstruction::nop_instruction_size, NativeInstruction::set_data32_simm13( inst2, (intptr_t)np));
115 }
116 break;
117 }
118 if (verify_only) {
119 ip->verify_data64_sethi( ip->addr_at(0), (intptr_t)x );
120 } else {
121 ip->set_data64_sethi( ip->addr_at(0), (intptr_t)x );
122 }
123 }
124 break;
125
126 default:
127 guarantee(false, "instruction must perform arithmetic or memory access");
128 }
129 }
130
131
132 address Relocation::pd_call_destination(address orig_addr) {
133 intptr_t adj = 0;
134 if (orig_addr != NULL) {
135 // We just moved this call instruction from orig_addr to addr().
136 // This means its target will appear to have grown by addr() - orig_addr.
137 adj = -( addr() - orig_addr );
138 }
139 if (NativeCall::is_call_at(addr())) {
140 NativeCall* call = nativeCall_at(addr());
141 return call->destination() + adj;
142 }
143 if (NativeFarCall::is_call_at(addr())) {
144 NativeFarCall* call = nativeFarCall_at(addr());
145 return call->destination() + adj;
146 }
147 // Special case: Patchable branch local to the code cache.
148 // This will break badly if the code cache grows larger than a few Mb.
149 NativeGeneralJump* br = nativeGeneralJump_at(addr());
150 return br->jump_destination() + adj;
151 }
152
153
154 void Relocation::pd_set_call_destination(address x) {
155 if (NativeCall::is_call_at(addr())) {
156 NativeCall* call = nativeCall_at(addr());
157 call->set_destination(x);
158 return;
159 }
160 if (NativeFarCall::is_call_at(addr())) {
161 NativeFarCall* call = nativeFarCall_at(addr());
162 call->set_destination(x);
163 return;
164 }
165 // Special case: Patchable branch local to the code cache.
166 // This will break badly if the code cache grows larger than a few Mb.
167 NativeGeneralJump* br = nativeGeneralJump_at(addr());
168 br->set_jump_destination(x);
169 }
170
171
172 address* Relocation::pd_address_in_code() {
173 // SPARC never embeds addresses in code, at present.
174 //assert(type() == relocInfo::oop_type, "only oops are inlined at present");
175 return (address*)addr();
176 }
177
178
179 address Relocation::pd_get_address_from_code() {
180 // SPARC never embeds addresses in code, at present.
181 //assert(type() == relocInfo::oop_type, "only oops are inlined at present");
182 return *(address*)addr();
183 }
184
185 void poll_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {
186 }
187
188 void metadata_Relocation::pd_fix_value(address x) {
189 }