1 /*
2 * Copyright (c) 1998, 2012, 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/oop.inline.hpp"
30 #include "runtime/safepoint.hpp"
31
32 void Relocation::pd_set_data_value(address x, intptr_t o, bool verify_only) {
33 NativeInstruction* ip = nativeInstruction_at(addr());
34 jint inst = ip->long_at(0);
35 assert(inst != NativeInstruction::illegal_instruction(), "no breakpoint");
36 switch (Assembler::inv_op(inst)) {
37
38 case Assembler::ldst_op:
39 #ifdef ASSERT
40 switch (Assembler::inv_op3(inst)) {
41 case Assembler::lduw_op3:
42 case Assembler::ldub_op3:
43 case Assembler::lduh_op3:
44 case Assembler::ldd_op3:
45 case Assembler::ldsw_op3:
46 case Assembler::ldsb_op3:
47 case Assembler::ldsh_op3:
48 case Assembler::ldx_op3:
49 case Assembler::ldf_op3:
50 case Assembler::lddf_op3:
51 case Assembler::stw_op3:
52 case Assembler::stb_op3:
53 case Assembler::sth_op3:
54 case Assembler::std_op3:
55 case Assembler::stx_op3:
56 case Assembler::stf_op3:
57 case Assembler::stdf_op3:
58 case Assembler::casa_op3:
59 case Assembler::casxa_op3:
60 break;
61 default:
62 ShouldNotReachHere();
63 }
64 goto do_non_sethi;
65 #endif
66
67 case Assembler::arith_op:
68 #ifdef ASSERT
69 switch (Assembler::inv_op3(inst)) {
70 case Assembler::or_op3:
71 case Assembler::add_op3:
72 case Assembler::jmpl_op3:
73 break;
74 default:
75 ShouldNotReachHere();
76 }
77 do_non_sethi:;
78 #endif
79 {
80 guarantee(Assembler::inv_immed(inst), "must have a simm13 field");
81 int simm13 = Assembler::low10((intptr_t)x) + o;
82 guarantee(Assembler::is_simm13(simm13), "offset can't overflow simm13");
83 inst &= ~Assembler::simm( -1, 13);
84 inst |= Assembler::simm(simm13, 13);
85 if (verify_only) {
86 assert(ip->long_at(0) == inst, "instructions must match");
87 } else {
88 ip->set_long_at(0, inst);
89 }
90 }
91 break;
92
93 case Assembler::branch_op:
94 {
95 #ifdef _LP64
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) : oopDesc::encode_klass((Klass*)x);
101 inst &= ~Assembler::hi22(-1);
102 inst |= Assembler::hi22((intptr_t)np);
103 if (verify_only) {
104 assert(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 assert(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 #else
124 guarantee(Assembler::inv_op2(inst)==Assembler::sethi_op2, "must be sethi");
125 inst &= ~Assembler::hi22( -1);
126 inst |= Assembler::hi22((intptr_t)x);
127 // (ignore offset; it doesn't play into the sethi)
128 if (verify_only) {
129 assert(ip->long_at(0) == inst, "instructions must match");
130 } else {
131 ip->set_long_at(0, inst);
132 }
133 #endif
134 }
135 break;
136
137 default:
138 guarantee(false, "instruction must perform arithmetic or memory access");
139 }
140 }
141
142
143 address Relocation::pd_call_destination(address orig_addr) {
144 intptr_t adj = 0;
145 if (orig_addr != NULL) {
146 // We just moved this call instruction from orig_addr to addr().
147 // This means its target will appear to have grown by addr() - orig_addr.
148 adj = -( addr() - orig_addr );
149 }
150 if (NativeCall::is_call_at(addr())) {
151 NativeCall* call = nativeCall_at(addr());
152 return call->destination() + adj;
153 }
154 if (NativeFarCall::is_call_at(addr())) {
155 NativeFarCall* call = nativeFarCall_at(addr());
156 return call->destination() + adj;
157 }
158 // Special case: Patchable branch local to the code cache.
159 // This will break badly if the code cache grows larger than a few Mb.
160 NativeGeneralJump* br = nativeGeneralJump_at(addr());
161 return br->jump_destination() + adj;
162 }
163
164
165 void Relocation::pd_set_call_destination(address x) {
166 if (NativeCall::is_call_at(addr())) {
167 NativeCall* call = nativeCall_at(addr());
168 call->set_destination(x);
169 return;
170 }
171 if (NativeFarCall::is_call_at(addr())) {
172 NativeFarCall* call = nativeFarCall_at(addr());
173 call->set_destination(x);
174 return;
175 }
176 // Special case: Patchable branch local to the code cache.
177 // This will break badly if the code cache grows larger than a few Mb.
178 NativeGeneralJump* br = nativeGeneralJump_at(addr());
179 br->set_jump_destination(x);
180 }
181
182
183 address* Relocation::pd_address_in_code() {
184 // SPARC never embeds addresses in code, at present.
185 //assert(type() == relocInfo::oop_type, "only oops are inlined at present");
186 return (address*)addr();
187 }
188
189
190 address Relocation::pd_get_address_from_code() {
191 // SPARC never embeds addresses in code, at present.
192 //assert(type() == relocInfo::oop_type, "only oops are inlined at present");
193 return *(address*)addr();
194 }
195
196 void poll_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {
197 }
198
199 void poll_return_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {
200 }
201
202 void metadata_Relocation::pd_fix_value(address x) {
203 }