1 /*
2 * Copyright 1997-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 // StubRoutines provides entry points to assembly routines used by
26 // compiled code and the run-time system. Platform-specific entry
27 // points are defined in the platform-specific inner class.
28 //
29 // Class scheme:
30 //
31 // platform-independent platform-dependent
32 //
33 // stubRoutines.hpp <-- included -- stubRoutines_<arch>.hpp
34 // ^ ^
35 // | |
36 // implements implements
37 // | |
38 // | |
39 // stubRoutines.cpp stubRoutines_<arch>.cpp
40 // stubRoutines_<os_family>.cpp stubGenerator_<arch>.cpp
41 // stubRoutines_<os_arch>.cpp
42 //
43 // Note 1: The important thing is a clean decoupling between stub
44 // entry points (interfacing to the whole vm; i.e., 1-to-n
45 // relationship) and stub generators (interfacing only to
46 // the entry points implementation; i.e., 1-to-1 relationship).
47 // This significantly simplifies changes in the generator
48 // structure since the rest of the vm is not affected.
49 //
50 // Note 2: stubGenerator_<arch>.cpp contains a minimal portion of
51 // machine-independent code; namely the generator calls of
52 // the generator functions that are used platform-independently.
53 // However, it comes with the advantage of having a 1-file
54 // implementation of the generator. It should be fairly easy
55 // to change, should it become a problem later.
56 //
57 // Scheme for adding a new entry point:
58 //
59 // 1. determine if it's a platform-dependent or independent entry point
60 // a) if platform independent: make subsequent changes in the independent files
61 // b) if platform dependent: make subsequent changes in the dependent files
62 // 2. add a private instance variable holding the entry point address
63 // 3. add a public accessor function to the instance variable
64 // 4. implement the corresponding generator function in the platform-dependent
65 // stubGenerator_<arch>.cpp file and call the function in generate_all() of that file
66
67
68 class StubRoutines: AllStatic {
69
70 public:
71 enum platform_independent_constants {
72 max_size_of_parameters = 256 // max. parameter size supported by megamorphic lookups
73 };
74
75 // Dependencies
76 friend class StubGenerator;
77 #include "incls/_stubRoutines_pd.hpp.incl" // machine-specific parts
78
79 static jint _verify_oop_count;
80 static address _verify_oop_subroutine_entry;
81
82 static address _call_stub_return_address; // the return PC, when returning to a call stub
83 static address _call_stub_entry;
84 static address _forward_exception_entry;
85 static address _catch_exception_entry;
86 static address _throw_AbstractMethodError_entry;
87 static address _throw_IncompatibleClassChangeError_entry;
88 static address _throw_ArithmeticException_entry;
89 static address _throw_NullPointerException_entry;
90 static address _throw_NullPointerException_at_call_entry;
91 static address _throw_StackOverflowError_entry;
92 static address _handler_for_unsafe_access_entry;
93
94 static address _atomic_xchg_entry;
95 static address _atomic_xchg_ptr_entry;
96 static address _atomic_store_entry;
97 static address _atomic_store_ptr_entry;
98 static address _atomic_cmpxchg_entry;
99 static address _atomic_cmpxchg_ptr_entry;
100 static address _atomic_cmpxchg_long_entry;
101 static address _atomic_add_entry;
102 static address _atomic_add_ptr_entry;
103 static address _fence_entry;
104 static address _d2i_wrapper;
105 static address _d2l_wrapper;
106
107 static jint _fpu_cntrl_wrd_std;
108 static jint _fpu_cntrl_wrd_24;
109 static jint _fpu_cntrl_wrd_64;
110 static jint _fpu_cntrl_wrd_trunc;
111 static jint _mxcsr_std;
112 static jint _fpu_subnormal_bias1[3];
113 static jint _fpu_subnormal_bias2[3];
114
115 static BufferBlob* _code1; // code buffer for initial routines
116 static BufferBlob* _code2; // code buffer for all other routines
117
118 // Leaf routines which implement arraycopy and their addresses
119 // arraycopy operands aligned on element type boundary
120 static address _jbyte_arraycopy;
121 static address _jshort_arraycopy;
122 static address _jint_arraycopy;
123 static address _jlong_arraycopy;
124 static address _oop_arraycopy;
125 static address _jbyte_disjoint_arraycopy;
126 static address _jshort_disjoint_arraycopy;
127 static address _jint_disjoint_arraycopy;
128 static address _jlong_disjoint_arraycopy;
129 static address _oop_disjoint_arraycopy;
130
131 // arraycopy operands aligned on zero'th element boundary
132 // These are identical to the ones aligned aligned on an
133 // element type boundary, except that they assume that both
134 // source and destination are HeapWord aligned.
135 static address _arrayof_jbyte_arraycopy;
136 static address _arrayof_jshort_arraycopy;
137 static address _arrayof_jint_arraycopy;
138 static address _arrayof_jlong_arraycopy;
139 static address _arrayof_oop_arraycopy;
140 static address _arrayof_jbyte_disjoint_arraycopy;
141 static address _arrayof_jshort_disjoint_arraycopy;
142 static address _arrayof_jint_disjoint_arraycopy;
143 static address _arrayof_jlong_disjoint_arraycopy;
144 static address _arrayof_oop_disjoint_arraycopy;
145
146 // these are recommended but optional:
147 static address _checkcast_arraycopy;
148 static address _unsafe_arraycopy;
149 static address _generic_arraycopy;
150
151 public:
152 // Initialization/Testing
153 static void initialize1(); // must happen before universe::genesis
154 static void initialize2(); // must happen after universe::genesis
155
156 static bool contains(address addr) {
157 return
158 (_code1 != NULL && _code1->blob_contains(addr)) ||
159 (_code2 != NULL && _code2->blob_contains(addr)) ;
160 }
161
162 // Debugging
163 static jint verify_oop_count() { return _verify_oop_count; }
164 static jint* verify_oop_count_addr() { return &_verify_oop_count; }
165 // a subroutine for debugging the GC
166 static address verify_oop_subroutine_entry_address() { return (address)&_verify_oop_subroutine_entry; }
167
168 static address catch_exception_entry() { return _catch_exception_entry; }
169
170 // Calls to Java
171 typedef void (*CallStub)(
172 address link,
173 intptr_t* result,
174 BasicType result_type,
175 methodOopDesc* method,
176 address entry_point,
177 intptr_t* parameters,
178 int size_of_parameters,
179 TRAPS
180 );
181
182 static CallStub call_stub() { return CAST_TO_FN_PTR(CallStub, _call_stub_entry); }
183
184 // Exceptions
185 static address forward_exception_entry() { return _forward_exception_entry; }
186 // Implicit exceptions
187 static address throw_AbstractMethodError_entry() { return _throw_AbstractMethodError_entry; }
188 static address throw_IncompatibleClassChangeError_entry(){ return _throw_IncompatibleClassChangeError_entry; }
189 static address throw_ArithmeticException_entry() { return _throw_ArithmeticException_entry; }
190 static address throw_NullPointerException_entry() { return _throw_NullPointerException_entry; }
191 static address throw_NullPointerException_at_call_entry(){ return _throw_NullPointerException_at_call_entry; }
192 static address throw_StackOverflowError_entry() { return _throw_StackOverflowError_entry; }
193
194 // Exceptions during unsafe access - should throw Java exception rather
195 // than crash.
196 static address handler_for_unsafe_access() { return _handler_for_unsafe_access_entry; }
197
198 static address atomic_xchg_entry() { return _atomic_xchg_entry; }
199 static address atomic_xchg_ptr_entry() { return _atomic_xchg_ptr_entry; }
200 static address atomic_store_entry() { return _atomic_store_entry; }
201 static address atomic_store_ptr_entry() { return _atomic_store_ptr_entry; }
202 static address atomic_cmpxchg_entry() { return _atomic_cmpxchg_entry; }
203 static address atomic_cmpxchg_ptr_entry() { return _atomic_cmpxchg_ptr_entry; }
204 static address atomic_cmpxchg_long_entry() { return _atomic_cmpxchg_long_entry; }
205 static address atomic_add_entry() { return _atomic_add_entry; }
206 static address atomic_add_ptr_entry() { return _atomic_add_ptr_entry; }
207 static address fence_entry() { return _fence_entry; }
208
209 static address d2i_wrapper() { return _d2i_wrapper; }
210 static address d2l_wrapper() { return _d2l_wrapper; }
211 static jint fpu_cntrl_wrd_std() { return _fpu_cntrl_wrd_std; }
212 static address addr_fpu_cntrl_wrd_std() { return (address)&_fpu_cntrl_wrd_std; }
213 static address addr_fpu_cntrl_wrd_24() { return (address)&_fpu_cntrl_wrd_24; }
214 static address addr_fpu_cntrl_wrd_64() { return (address)&_fpu_cntrl_wrd_64; }
215 static address addr_fpu_cntrl_wrd_trunc() { return (address)&_fpu_cntrl_wrd_trunc; }
216 static address addr_mxcsr_std() { return (address)&_mxcsr_std; }
217 static address addr_fpu_subnormal_bias1() { return (address)&_fpu_subnormal_bias1; }
218 static address addr_fpu_subnormal_bias2() { return (address)&_fpu_subnormal_bias2; }
219
220
221 static address jbyte_arraycopy() { return _jbyte_arraycopy; }
222 static address jshort_arraycopy() { return _jshort_arraycopy; }
223 static address jint_arraycopy() { return _jint_arraycopy; }
224 static address jlong_arraycopy() { return _jlong_arraycopy; }
225 static address oop_arraycopy() { return _oop_arraycopy; }
226 static address jbyte_disjoint_arraycopy() { return _jbyte_disjoint_arraycopy; }
227 static address jshort_disjoint_arraycopy() { return _jshort_disjoint_arraycopy; }
228 static address jint_disjoint_arraycopy() { return _jint_disjoint_arraycopy; }
229 static address jlong_disjoint_arraycopy() { return _jlong_disjoint_arraycopy; }
230 static address oop_disjoint_arraycopy() { return _oop_disjoint_arraycopy; }
231
232 static address arrayof_jbyte_arraycopy() { return _arrayof_jbyte_arraycopy; }
233 static address arrayof_jshort_arraycopy() { return _arrayof_jshort_arraycopy; }
234 static address arrayof_jint_arraycopy() { return _arrayof_jint_arraycopy; }
235 static address arrayof_jlong_arraycopy() { return _arrayof_jlong_arraycopy; }
236 static address arrayof_oop_arraycopy() { return _arrayof_oop_arraycopy; }
237
238 static address arrayof_jbyte_disjoint_arraycopy() { return _arrayof_jbyte_disjoint_arraycopy; }
239 static address arrayof_jshort_disjoint_arraycopy() { return _arrayof_jshort_disjoint_arraycopy; }
240 static address arrayof_jint_disjoint_arraycopy() { return _arrayof_jint_disjoint_arraycopy; }
241 static address arrayof_jlong_disjoint_arraycopy() { return _arrayof_jlong_disjoint_arraycopy; }
242 static address arrayof_oop_disjoint_arraycopy() { return _arrayof_oop_disjoint_arraycopy; }
243
244 static address checkcast_arraycopy() { return _checkcast_arraycopy; }
245 static address unsafe_arraycopy() { return _unsafe_arraycopy; }
246 static address generic_arraycopy() { return _generic_arraycopy; }
247
248 //
249 // Default versions of the above arraycopy functions for platforms which do
250 // not have specialized versions
251 //
252 static void jbyte_copy (jbyte* src, jbyte* dest, size_t count);
253 static void jshort_copy(jshort* src, jshort* dest, size_t count);
254 static void jint_copy (jint* src, jint* dest, size_t count);
255 static void jlong_copy (jlong* src, jlong* dest, size_t count);
256 static void oop_copy (oop* src, oop* dest, size_t count);
257
258 static void arrayof_jbyte_copy (HeapWord* src, HeapWord* dest, size_t count);
259 static void arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count);
260 static void arrayof_jint_copy (HeapWord* src, HeapWord* dest, size_t count);
261 static void arrayof_jlong_copy (HeapWord* src, HeapWord* dest, size_t count);
262 static void arrayof_oop_copy (HeapWord* src, HeapWord* dest, size_t count);
263 };