1 /*
2 * Copyright (c) 1998, 2009, 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 "incls/_precompiled.incl"
26 # include "incls/_relocInfo_sparc.cpp.incl"
27
28 void Relocation::pd_set_data_value(address x, intptr_t o) {
29 NativeInstruction* ip = nativeInstruction_at(addr());
30 jint inst = ip->long_at(0);
31 assert(inst != NativeInstruction::illegal_instruction(), "no breakpoint");
32 switch (Assembler::inv_op(inst)) {
33
34 case Assembler::ldst_op:
35 #ifdef ASSERT
36 switch (Assembler::inv_op3(inst)) {
37 case Assembler::lduw_op3:
38 case Assembler::ldub_op3:
39 case Assembler::lduh_op3:
40 case Assembler::ldd_op3:
41 case Assembler::ldsw_op3:
42 case Assembler::ldsb_op3:
43 case Assembler::ldsh_op3:
44 case Assembler::ldx_op3:
45 case Assembler::ldf_op3:
46 case Assembler::lddf_op3:
47 case Assembler::stw_op3:
48 case Assembler::stb_op3:
49 case Assembler::sth_op3:
50 case Assembler::std_op3:
51 case Assembler::stx_op3:
52 case Assembler::stf_op3:
53 case Assembler::stdf_op3:
54 case Assembler::casa_op3:
55 case Assembler::casxa_op3:
56 break;
57 default:
58 ShouldNotReachHere();
59 }
60 goto do_non_sethi;
61 #endif
62
63 case Assembler::arith_op:
64 #ifdef ASSERT
65 switch (Assembler::inv_op3(inst)) {
66 case Assembler::or_op3:
67 case Assembler::add_op3:
68 case Assembler::jmpl_op3:
69 break;
70 default:
71 ShouldNotReachHere();
72 }
73 do_non_sethi:;
74 #endif
75 {
76 guarantee(Assembler::inv_immed(inst), "must have a simm13 field");
77 int simm13 = Assembler::low10((intptr_t)x) + o;
78 guarantee(Assembler::is_simm13(simm13), "offset can't overflow simm13");
79 inst &= ~Assembler::simm( -1, 13);
80 inst |= Assembler::simm(simm13, 13);
81 ip->set_long_at(0, inst);
82 }
83 break;
84
85 case Assembler::branch_op:
86 {
87 #ifdef _LP64
88 jint inst2;
89 guarantee(Assembler::inv_op2(inst)==Assembler::sethi_op2, "must be sethi");
90 if (format() != 0) {
91 assert(type() == relocInfo::oop_type, "only narrow oops case");
92 jint np = oopDesc::encode_heap_oop((oop)x);
93 inst &= ~Assembler::hi22(-1);
94 inst |= Assembler::hi22((intptr_t)np);
95 ip->set_long_at(0, inst);
96 inst2 = ip->long_at( NativeInstruction::nop_instruction_size );
97 guarantee(Assembler::inv_op(inst2)==Assembler::arith_op, "arith op");
98 ip->set_long_at(NativeInstruction::nop_instruction_size, ip->set_data32_simm13( inst2, (intptr_t)np));
99 break;
100 }
101 ip->set_data64_sethi( ip->addr_at(0), (intptr_t)x );
102 #else
103 guarantee(Assembler::inv_op2(inst)==Assembler::sethi_op2, "must be sethi");
104 inst &= ~Assembler::hi22( -1);
105 inst |= Assembler::hi22((intptr_t)x);
106 // (ignore offset; it doesn't play into the sethi)
107 ip->set_long_at(0, inst);
108 #endif
109 }
110 break;
111
112 default:
113 guarantee(false, "instruction must perform arithmetic or memory access");
114 }
115 }
116
117
118 address Relocation::pd_call_destination(address orig_addr) {
119 intptr_t adj = 0;
120 if (orig_addr != NULL) {
121 // We just moved this call instruction from orig_addr to addr().
122 // This means its target will appear to have grown by addr() - orig_addr.
123 adj = -( addr() - orig_addr );
124 }
125 if (NativeCall::is_call_at(addr())) {
126 NativeCall* call = nativeCall_at(addr());
127 return call->destination() + adj;
128 }
129 if (NativeFarCall::is_call_at(addr())) {
130 NativeFarCall* call = nativeFarCall_at(addr());
131 return call->destination() + adj;
132 }
133 // Special case: Patchable branch local to the code cache.
134 // This will break badly if the code cache grows larger than a few Mb.
135 NativeGeneralJump* br = nativeGeneralJump_at(addr());
136 return br->jump_destination() + adj;
137 }
138
139
140 void Relocation::pd_set_call_destination(address x) {
141 if (NativeCall::is_call_at(addr())) {
142 NativeCall* call = nativeCall_at(addr());
143 call->set_destination(x);
144 return;
145 }
146 if (NativeFarCall::is_call_at(addr())) {
147 NativeFarCall* call = nativeFarCall_at(addr());
148 call->set_destination(x);
149 return;
150 }
151 // Special case: Patchable branch local to the code cache.
152 // This will break badly if the code cache grows larger than a few Mb.
153 NativeGeneralJump* br = nativeGeneralJump_at(addr());
154 br->set_jump_destination(x);
155 }
156
157
158 address* Relocation::pd_address_in_code() {
159 // SPARC never embeds addresses in code, at present.
160 //assert(type() == relocInfo::oop_type, "only oops are inlined at present");
161 return (address*)addr();
162 }
163
164
165 address Relocation::pd_get_address_from_code() {
166 // SPARC never embeds addresses in code, at present.
167 //assert(type() == relocInfo::oop_type, "only oops are inlined at present");
168 return *(address*)addr();
169 }
170
171
172 int Relocation::pd_breakpoint_size() {
173 // minimum breakpoint size, in short words
174 return NativeIllegalInstruction::instruction_size / sizeof(short);
175 }
176
177 void Relocation::pd_swap_in_breakpoint(address x, short* instrs, int instrlen) {
178 Untested("pd_swap_in_breakpoint");
179 // %%% probably do not need a general instrlen; just use the trap size
180 if (instrs != NULL) {
181 assert(instrlen * sizeof(short) == NativeIllegalInstruction::instruction_size, "enough instrlen in reloc. data");
182 for (int i = 0; i < instrlen; i++) {
183 instrs[i] = ((short*)x)[i];
184 }
185 }
186 NativeIllegalInstruction::insert(x);
187 }
188
189
190 void Relocation::pd_swap_out_breakpoint(address x, short* instrs, int instrlen) {
191 Untested("pd_swap_out_breakpoint");
192 assert(instrlen * sizeof(short) == sizeof(int), "enough buf");
193 union { int l; short s[1]; } u;
194 for (int i = 0; i < instrlen; i++) {
195 u.s[i] = instrs[i];
196 }
197 NativeInstruction* ni = nativeInstruction_at(x);
198 ni->set_long_at(0, u.l);
199 }
200
201 void poll_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {
202 }
203
204 void poll_return_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {
205 }