1 /*
2 * Copyright (c) 1998, 2018, 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/macroAssembler.inline.hpp"
27 #include "interpreter/interp_masm.hpp"
28 #include "interpreter/interpreter.hpp"
29 #include "interpreter/interpreterRuntime.hpp"
30 #include "memory/allocation.inline.hpp"
31 #include "memory/universe.hpp"
32 #include "oops/method.hpp"
33 #include "oops/oop.inline.hpp"
34 #include "runtime/handles.inline.hpp"
35 #include "runtime/icache.hpp"
36 #include "runtime/interfaceSupport.inline.hpp"
37 #include "runtime/signature.hpp"
38
39
40 #define __ _masm->
41
42
43 // Implementation of SignatureHandlerGenerator
44 InterpreterRuntime::SignatureHandlerGenerator::SignatureHandlerGenerator(
45 const methodHandle& method, CodeBuffer* buffer) : NativeSignatureIterator(method) {
46 _masm = new MacroAssembler(buffer);
47 }
48
49 void InterpreterRuntime::SignatureHandlerGenerator::pass_word(int size_of_arg, int offset_in_arg) {
50 Argument jni_arg(jni_offset() + offset_in_arg, false);
51 Register Rtmp = O0;
52 __ ld(Llocals, Interpreter::local_offset_in_bytes(offset()), Rtmp);
53
54 __ store_argument(Rtmp, jni_arg);
55 }
56
57 void InterpreterRuntime::SignatureHandlerGenerator::pass_long() {
58 Argument jni_arg(jni_offset(), false);
59 Register Rtmp = O0;
60
61 __ ldx(Llocals, Interpreter::local_offset_in_bytes(offset() + 1), Rtmp);
62 __ store_long_argument(Rtmp, jni_arg);
63 }
64
65
66 void InterpreterRuntime::SignatureHandlerGenerator::pass_float() {
67 Argument jni_arg(jni_offset(), false);
68 FloatRegister Rtmp = F0;
69 __ ldf(FloatRegisterImpl::S, Llocals, Interpreter::local_offset_in_bytes(offset()), Rtmp);
70 __ store_float_argument(Rtmp, jni_arg);
71 }
72
73
74 void InterpreterRuntime::SignatureHandlerGenerator::pass_double() {
75 Argument jni_arg(jni_offset(), false);
76 FloatRegister Rtmp = F0;
77 __ ldf(FloatRegisterImpl::D, Llocals, Interpreter::local_offset_in_bytes(offset() + 1), Rtmp);
78 __ store_double_argument(Rtmp, jni_arg);
79 }
80
81 void InterpreterRuntime::SignatureHandlerGenerator::pass_object() {
82 Argument jni_arg(jni_offset(), false);
83 Argument java_arg( offset(), true);
84 Register Rtmp1 = O0;
85 Register Rtmp2 = jni_arg.is_register() ? jni_arg.as_register() : O0;
86 Register Rtmp3 = G3_scratch;
87
88 // the handle for a receiver will never be null
89 bool do_NULL_check = offset() != 0 || is_static();
90
91 Address h_arg = Address(Llocals, Interpreter::local_offset_in_bytes(offset()));
92 __ ld_ptr(h_arg, Rtmp1);
93 if (!do_NULL_check) {
94 __ add(h_arg.base(), h_arg.disp(), Rtmp2);
95 } else {
96 if (Rtmp1 == Rtmp2)
97 __ tst(Rtmp1);
98 else __ addcc(G0, Rtmp1, Rtmp2); // optimize mov/test pair
99 Label L;
100 __ brx(Assembler::notZero, true, Assembler::pt, L);
101 __ delayed()->add(h_arg.base(), h_arg.disp(), Rtmp2);
102 __ bind(L);
103 }
104 __ store_ptr_argument(Rtmp2, jni_arg); // this is often a no-op
105 }
106
107
108 void InterpreterRuntime::SignatureHandlerGenerator::generate(uint64_t fingerprint) {
109
110 // generate code to handle arguments
111 iterate(fingerprint);
112
113 // return result handler
114 AddressLiteral result_handler(Interpreter::result_handler(method()->result_type()));
115 __ sethi(result_handler, Lscratch);
116 __ retl();
117 __ delayed()->add(Lscratch, result_handler.low10(), Lscratch);
118
119 __ flush();
120 }
121
122
123 // Implementation of SignatureHandlerLibrary
124
125 void SignatureHandlerLibrary::pd_set_handler(address handler) {}
126
127
128 class SlowSignatureHandler: public NativeSignatureIterator {
129 private:
130 address _from;
131 intptr_t* _to;
132 intptr_t* _RegArgSignature; // Signature of first Arguments to be passed in Registers
133 uint _argcount;
134
135 enum { // We need to differenciate float from non floats in reg args
136 non_float = 0,
137 float_sig = 1,
138 double_sig = 2,
139 long_sig = 3
140 };
141
142 virtual void pass_int() {
143 *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
144 _from -= Interpreter::stackElementSize;
145 add_signature( non_float );
146 }
147
148 virtual void pass_object() {
149 // pass address of from
150 intptr_t *from_addr = (intptr_t*)(_from + Interpreter::local_offset_in_bytes(0));
151 *_to++ = (*from_addr == 0) ? NULL : (intptr_t) from_addr;
152 _from -= Interpreter::stackElementSize;
153 add_signature( non_float );
154 }
155
156 virtual void pass_float() {
157 *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
158 _from -= Interpreter::stackElementSize;
159 add_signature( float_sig );
160 }
161
162 virtual void pass_double() {
163 *_to++ = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
164 _from -= 2*Interpreter::stackElementSize;
165 add_signature( double_sig );
166 }
167
168 virtual void pass_long() {
169 _to[0] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
170 _to += 1;
171 _from -= 2*Interpreter::stackElementSize;
172 add_signature( long_sig );
173 }
174
175 virtual void add_signature( intptr_t sig_type ) {
176 if ( _argcount < (sizeof (intptr_t))*4 ) {
177 *_RegArgSignature |= (sig_type << (_argcount*2) );
178 _argcount++;
179 }
180 }
181
182
183 public:
184 SlowSignatureHandler(const methodHandle& method, address from, intptr_t* to, intptr_t *RegArgSig) : NativeSignatureIterator(method) {
185 _from = from;
186 _to = to;
187 _RegArgSignature = RegArgSig;
188 *_RegArgSignature = 0;
189 _argcount = method->is_static() ? 2 : 1;
190 }
191 };
192
193
194 IRT_ENTRY(address, InterpreterRuntime::slow_signature_handler(
195 JavaThread* thread,
196 Method* method,
197 intptr_t* from,
198 intptr_t* to ))
199 methodHandle m(thread, method);
200 assert(m->is_native(), "sanity check");
201 // handle arguments
202 // Warning: We use reg arg slot 00 temporarily to return the RegArgSignature
203 // back to the code that pops the arguments into the CPU registers
204 SlowSignatureHandler(m, (address)from, m->is_static() ? to+2 : to+1, to).iterate((uint64_t)CONST64(-1));
205 // return result handler
206 return Interpreter::result_handler(m->result_type());
207 IRT_END