Fri, 29 Apr 2011 11:15:30 -0700
Merge
1 /*
2 * Copyright (c) 1998, 2011, 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 */
25 #include "precompiled.hpp"
26 #include "asm/assembler.inline.hpp"
27 #include "assembler_sparc.inline.hpp"
28 #include "code/relocInfo.hpp"
29 #include "nativeInst_sparc.hpp"
30 #include "oops/oop.inline.hpp"
31 #include "runtime/safepoint.hpp"
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)) {
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
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 assert(ip->long_at(0) == inst, "instructions must match");
88 } else {
89 ip->set_long_at(0, inst);
90 }
91 }
92 break;
94 case Assembler::branch_op:
95 {
96 #ifdef _LP64
97 jint inst2;
98 guarantee(Assembler::inv_op2(inst)==Assembler::sethi_op2, "must be sethi");
99 if (format() != 0) {
100 assert(type() == relocInfo::oop_type, "only narrow oops case");
101 jint np = oopDesc::encode_heap_oop((oop)x);
102 inst &= ~Assembler::hi22(-1);
103 inst |= Assembler::hi22((intptr_t)np);
104 if (verify_only) {
105 assert(ip->long_at(0) == inst, "instructions must match");
106 } else {
107 ip->set_long_at(0, inst);
108 }
109 inst2 = ip->long_at( NativeInstruction::nop_instruction_size );
110 guarantee(Assembler::inv_op(inst2)==Assembler::arith_op, "arith op");
111 if (verify_only) {
112 assert(ip->long_at(NativeInstruction::nop_instruction_size) == NativeInstruction::set_data32_simm13( inst2, (intptr_t)np),
113 "instructions must match");
114 } else {
115 ip->set_long_at(NativeInstruction::nop_instruction_size, NativeInstruction::set_data32_simm13( inst2, (intptr_t)np));
116 }
117 break;
118 }
119 if (verify_only) {
120 ip->verify_data64_sethi( ip->addr_at(0), (intptr_t)x );
121 } else {
122 ip->set_data64_sethi( ip->addr_at(0), (intptr_t)x );
123 }
124 #else
125 guarantee(Assembler::inv_op2(inst)==Assembler::sethi_op2, "must be sethi");
126 inst &= ~Assembler::hi22( -1);
127 inst |= Assembler::hi22((intptr_t)x);
128 // (ignore offset; it doesn't play into the sethi)
129 if (verify_only) {
130 assert(ip->long_at(0) == inst, "instructions must match");
131 } else {
132 ip->set_long_at(0, inst);
133 }
134 #endif
135 }
136 break;
138 default:
139 guarantee(false, "instruction must perform arithmetic or memory access");
140 }
141 }
144 address Relocation::pd_call_destination(address orig_addr) {
145 intptr_t adj = 0;
146 if (orig_addr != NULL) {
147 // We just moved this call instruction from orig_addr to addr().
148 // This means its target will appear to have grown by addr() - orig_addr.
149 adj = -( addr() - orig_addr );
150 }
151 if (NativeCall::is_call_at(addr())) {
152 NativeCall* call = nativeCall_at(addr());
153 return call->destination() + adj;
154 }
155 if (NativeFarCall::is_call_at(addr())) {
156 NativeFarCall* call = nativeFarCall_at(addr());
157 return call->destination() + adj;
158 }
159 // Special case: Patchable branch local to the code cache.
160 // This will break badly if the code cache grows larger than a few Mb.
161 NativeGeneralJump* br = nativeGeneralJump_at(addr());
162 return br->jump_destination() + adj;
163 }
166 void Relocation::pd_set_call_destination(address x) {
167 if (NativeCall::is_call_at(addr())) {
168 NativeCall* call = nativeCall_at(addr());
169 call->set_destination(x);
170 return;
171 }
172 if (NativeFarCall::is_call_at(addr())) {
173 NativeFarCall* call = nativeFarCall_at(addr());
174 call->set_destination(x);
175 return;
176 }
177 // Special case: Patchable branch local to the code cache.
178 // This will break badly if the code cache grows larger than a few Mb.
179 NativeGeneralJump* br = nativeGeneralJump_at(addr());
180 br->set_jump_destination(x);
181 }
184 address* Relocation::pd_address_in_code() {
185 // SPARC never embeds addresses in code, at present.
186 //assert(type() == relocInfo::oop_type, "only oops are inlined at present");
187 return (address*)addr();
188 }
191 address Relocation::pd_get_address_from_code() {
192 // SPARC never embeds addresses in code, at present.
193 //assert(type() == relocInfo::oop_type, "only oops are inlined at present");
194 return *(address*)addr();
195 }
198 int Relocation::pd_breakpoint_size() {
199 // minimum breakpoint size, in short words
200 return NativeIllegalInstruction::instruction_size / sizeof(short);
201 }
203 void Relocation::pd_swap_in_breakpoint(address x, short* instrs, int instrlen) {
204 Untested("pd_swap_in_breakpoint");
205 // %%% probably do not need a general instrlen; just use the trap size
206 if (instrs != NULL) {
207 assert(instrlen * sizeof(short) == NativeIllegalInstruction::instruction_size, "enough instrlen in reloc. data");
208 for (int i = 0; i < instrlen; i++) {
209 instrs[i] = ((short*)x)[i];
210 }
211 }
212 NativeIllegalInstruction::insert(x);
213 }
216 void Relocation::pd_swap_out_breakpoint(address x, short* instrs, int instrlen) {
217 Untested("pd_swap_out_breakpoint");
218 assert(instrlen * sizeof(short) == sizeof(int), "enough buf");
219 union { int l; short s[1]; } u;
220 for (int i = 0; i < instrlen; i++) {
221 u.s[i] = instrs[i];
222 }
223 NativeInstruction* ni = nativeInstruction_at(x);
224 ni->set_long_at(0, u.l);
225 }
227 void poll_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {
228 }
230 void poll_return_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {
231 }