1 /*
2 * Copyright (c) 1998, 2010, 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 "interpreter/interpreter.hpp"
27 #include "interpreter/interpreterRuntime.hpp"
28 #include "memory/allocation.inline.hpp"
29 #include "memory/universe.inline.hpp"
30 #include "oops/methodOop.hpp"
31 #include "oops/oop.inline.hpp"
32 #include "runtime/handles.inline.hpp"
33 #include "runtime/icache.hpp"
34 #include "runtime/interfaceSupport.hpp"
35 #include "runtime/signature.hpp"
36
37
38 #define __ _masm->
39
40
41 // Implementation of SignatureHandlerGenerator
42
43 void InterpreterRuntime::SignatureHandlerGenerator::pass_word(int size_of_arg, int offset_in_arg) {
44 Argument jni_arg(jni_offset() + offset_in_arg, false);
45 Register Rtmp = O0;
46 __ ld(Llocals, Interpreter::local_offset_in_bytes(offset()), Rtmp);
47
48 __ store_argument(Rtmp, jni_arg);
49 }
50
51 void InterpreterRuntime::SignatureHandlerGenerator::pass_long() {
52 Argument jni_arg(jni_offset(), false);
53 Register Rtmp = O0;
54
55 #ifdef _LP64
56 __ ldx(Llocals, Interpreter::local_offset_in_bytes(offset() + 1), Rtmp);
57 __ store_long_argument(Rtmp, jni_arg);
58 #else
59 __ ld(Llocals, Interpreter::local_offset_in_bytes(offset() + 1), Rtmp);
60 __ store_argument(Rtmp, jni_arg);
61 __ ld(Llocals, Interpreter::local_offset_in_bytes(offset() + 0), Rtmp);
62 Argument successor(jni_arg.successor());
63 __ store_argument(Rtmp, successor);
64 #endif
65 }
66
67
68 void InterpreterRuntime::SignatureHandlerGenerator::pass_float() {
69 Argument jni_arg(jni_offset(), false);
70 #ifdef _LP64
71 FloatRegister Rtmp = F0;
72 __ ldf(FloatRegisterImpl::S, Llocals, Interpreter::local_offset_in_bytes(offset()), Rtmp);
73 __ store_float_argument(Rtmp, jni_arg);
74 #else
75 Register Rtmp = O0;
76 __ ld(Llocals, Interpreter::local_offset_in_bytes(offset()), Rtmp);
77 __ store_argument(Rtmp, jni_arg);
78 #endif
79 }
80
81
82 void InterpreterRuntime::SignatureHandlerGenerator::pass_double() {
83 Argument jni_arg(jni_offset(), false);
84 #ifdef _LP64
85 FloatRegister Rtmp = F0;
86 __ ldf(FloatRegisterImpl::D, Llocals, Interpreter::local_offset_in_bytes(offset() + 1), Rtmp);
87 __ store_double_argument(Rtmp, jni_arg);
88 #else
89 Register Rtmp = O0;
90 __ ld(Llocals, Interpreter::local_offset_in_bytes(offset() + 1), Rtmp);
91 __ store_argument(Rtmp, jni_arg);
92 __ ld(Llocals, Interpreter::local_offset_in_bytes(offset()), Rtmp);
93 Argument successor(jni_arg.successor());
94 __ store_argument(Rtmp, successor);
95 #endif
96 }
97
98 void InterpreterRuntime::SignatureHandlerGenerator::pass_object() {
99 Argument jni_arg(jni_offset(), false);
100 Argument java_arg( offset(), true);
101 Register Rtmp1 = O0;
102 Register Rtmp2 = jni_arg.is_register() ? jni_arg.as_register() : O0;
103 Register Rtmp3 = G3_scratch;
104
105 // the handle for a receiver will never be null
106 bool do_NULL_check = offset() != 0 || is_static();
107
108 Address h_arg = Address(Llocals, Interpreter::local_offset_in_bytes(offset()));
109 __ ld_ptr(h_arg, Rtmp1);
110 if (!do_NULL_check) {
111 __ add(h_arg.base(), h_arg.disp(), Rtmp2);
112 } else {
113 if (Rtmp1 == Rtmp2)
114 __ tst(Rtmp1);
115 else __ addcc(G0, Rtmp1, Rtmp2); // optimize mov/test pair
116 Label L;
117 __ brx(Assembler::notZero, true, Assembler::pt, L);
118 __ delayed()->add(h_arg.base(), h_arg.disp(), Rtmp2);
119 __ bind(L);
120 }
121 __ store_ptr_argument(Rtmp2, jni_arg); // this is often a no-op
122 }
123
124
125 void InterpreterRuntime::SignatureHandlerGenerator::generate(uint64_t fingerprint) {
126
127 // generate code to handle arguments
128 iterate(fingerprint);
129
130 // return result handler
131 AddressLiteral result_handler(Interpreter::result_handler(method()->result_type()));
132 __ sethi(result_handler, Lscratch);
133 __ retl();
134 __ delayed()->add(Lscratch, result_handler.low10(), Lscratch);
135
136 __ flush();
137 }
138
139
140 // Implementation of SignatureHandlerLibrary
141
142 void SignatureHandlerLibrary::pd_set_handler(address handler) {}
143
144
145 class SlowSignatureHandler: public NativeSignatureIterator {
146 private:
147 address _from;
148 intptr_t* _to;
149 intptr_t* _RegArgSignature; // Signature of first Arguments to be passed in Registers
150 uint _argcount;
151
152 enum { // We need to differenciate float from non floats in reg args
153 non_float = 0,
154 float_sig = 1,
155 double_sig = 2,
156 long_sig = 3
157 };
158
159 virtual void pass_int() {
160 *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
161 _from -= Interpreter::stackElementSize;
162 add_signature( non_float );
163 }
164
165 virtual void pass_object() {
166 // pass address of from
167 intptr_t *from_addr = (intptr_t*)(_from + Interpreter::local_offset_in_bytes(0));
168 *_to++ = (*from_addr == 0) ? NULL : (intptr_t) from_addr;
169 _from -= Interpreter::stackElementSize;
170 add_signature( non_float );
171 }
172
173 #ifdef _LP64
174 virtual void pass_float() {
175 *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
176 _from -= Interpreter::stackElementSize;
177 add_signature( float_sig );
178 }
179
180 virtual void pass_double() {
181 *_to++ = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
182 _from -= 2*Interpreter::stackElementSize;
183 add_signature( double_sig );
184 }
185
186 virtual void pass_long() {
187 _to[0] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
188 _to += 1;
189 _from -= 2*Interpreter::stackElementSize;
190 add_signature( long_sig );
191 }
192 #else
193 // pass_double() is pass_long() and pass_float() only _LP64
194 virtual void pass_long() {
195 _to[0] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
196 _to[1] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(0));
197 _to += 2;
198 _from -= 2*Interpreter::stackElementSize;
199 add_signature( non_float );
200 }
201
202 virtual void pass_float() {
203 *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
204 _from -= Interpreter::stackElementSize;
205 add_signature( non_float );
206 }
207
208 #endif // _LP64
209
210 virtual void add_signature( intptr_t sig_type ) {
211 if ( _argcount < (sizeof (intptr_t))*4 ) {
212 *_RegArgSignature |= (sig_type << (_argcount*2) );
213 _argcount++;
214 }
215 }
216
217
218 public:
219 SlowSignatureHandler(methodHandle method, address from, intptr_t* to, intptr_t *RegArgSig) : NativeSignatureIterator(method) {
220 _from = from;
221 _to = to;
222 _RegArgSignature = RegArgSig;
223 *_RegArgSignature = 0;
224 _argcount = method->is_static() ? 2 : 1;
225 }
226 };
227
228
229 IRT_ENTRY(address, InterpreterRuntime::slow_signature_handler(
230 JavaThread* thread,
231 methodOopDesc* method,
232 intptr_t* from,
233 intptr_t* to ))
234 methodHandle m(thread, method);
235 assert(m->is_native(), "sanity check");
236 // handle arguments
237 // Warning: We use reg arg slot 00 temporarily to return the RegArgSignature
238 // back to the code that pops the arguments into the CPU registers
239 SlowSignatureHandler(m, (address)from, m->is_static() ? to+2 : to+1, to).iterate(UCONST64(-1));
240 // return result handler
241 return Interpreter::result_handler(m->result_type());
242 IRT_END