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1 /*
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2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // StubRoutines provides entry points to assembly routines used by
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26 // compiled code and the run-time system. Platform-specific entry
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27 // points are defined in the platform-specific inner class.
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28 //
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29 // Class scheme:
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30 //
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31 // platform-independent platform-dependent
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32 //
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33 // stubRoutines.hpp <-- included -- stubRoutines_<arch>.hpp
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34 // ^ ^
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35 // | |
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36 // implements implements
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37 // | |
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38 // | |
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39 // stubRoutines.cpp stubRoutines_<arch>.cpp
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40 // stubRoutines_<os_family>.cpp stubGenerator_<arch>.cpp
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41 // stubRoutines_<os_arch>.cpp
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42 //
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43 // Note 1: The important thing is a clean decoupling between stub
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44 // entry points (interfacing to the whole vm; i.e., 1-to-n
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45 // relationship) and stub generators (interfacing only to
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46 // the entry points implementation; i.e., 1-to-1 relationship).
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47 // This significantly simplifies changes in the generator
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48 // structure since the rest of the vm is not affected.
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49 //
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50 // Note 2: stubGenerator_<arch>.cpp contains a minimal portion of
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51 // machine-independent code; namely the generator calls of
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52 // the generator functions that are used platform-independently.
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53 // However, it comes with the advantage of having a 1-file
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54 // implementation of the generator. It should be fairly easy
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55 // to change, should it become a problem later.
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56 //
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57 // Scheme for adding a new entry point:
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58 //
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59 // 1. determine if it's a platform-dependent or independent entry point
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60 // a) if platform independent: make subsequent changes in the independent files
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61 // b) if platform dependent: make subsequent changes in the dependent files
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62 // 2. add a private instance variable holding the entry point address
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63 // 3. add a public accessor function to the instance variable
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64 // 4. implement the corresponding generator function in the platform-dependent
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65 // stubGenerator_<arch>.cpp file and call the function in generate_all() of that file
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66
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67
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68 class StubRoutines: AllStatic {
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69
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70 public:
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71 enum platform_independent_constants {
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72 max_size_of_parameters = 256 // max. parameter size supported by megamorphic lookups
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73 };
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74
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75 // Dependencies
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76 friend class StubGenerator;
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77 #include "incls/_stubRoutines_pd.hpp.incl" // machine-specific parts
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78
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79 static jint _verify_oop_count;
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80 static address _verify_oop_subroutine_entry;
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81
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82 static address _call_stub_return_address; // the return PC, when returning to a call stub
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83 static address _call_stub_entry;
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84 static address _forward_exception_entry;
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85 static address _catch_exception_entry;
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86 static address _throw_AbstractMethodError_entry;
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87 static address _throw_ArithmeticException_entry;
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88 static address _throw_NullPointerException_entry;
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89 static address _throw_NullPointerException_at_call_entry;
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90 static address _throw_StackOverflowError_entry;
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91 static address _handler_for_unsafe_access_entry;
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92
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93 static address _atomic_xchg_entry;
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94 static address _atomic_xchg_ptr_entry;
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95 static address _atomic_store_entry;
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96 static address _atomic_store_ptr_entry;
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97 static address _atomic_cmpxchg_entry;
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98 static address _atomic_cmpxchg_ptr_entry;
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99 static address _atomic_cmpxchg_long_entry;
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100 static address _atomic_add_entry;
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101 static address _atomic_add_ptr_entry;
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102 static address _fence_entry;
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103 static address _d2i_wrapper;
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104 static address _d2l_wrapper;
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105
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106 static jint _fpu_cntrl_wrd_std;
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107 static jint _fpu_cntrl_wrd_24;
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108 static jint _fpu_cntrl_wrd_64;
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109 static jint _fpu_cntrl_wrd_trunc;
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110 static jint _mxcsr_std;
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111 static jint _fpu_subnormal_bias1[3];
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112 static jint _fpu_subnormal_bias2[3];
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113
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114 static BufferBlob* _code1; // code buffer for initial routines
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115 static BufferBlob* _code2; // code buffer for all other routines
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116
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117 // Leaf routines which implement arraycopy and their addresses
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118 // arraycopy operands aligned on element type boundary
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119 static address _jbyte_arraycopy;
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120 static address _jshort_arraycopy;
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121 static address _jint_arraycopy;
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122 static address _jlong_arraycopy;
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123 static address _oop_arraycopy;
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124 static address _jbyte_disjoint_arraycopy;
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125 static address _jshort_disjoint_arraycopy;
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126 static address _jint_disjoint_arraycopy;
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127 static address _jlong_disjoint_arraycopy;
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128 static address _oop_disjoint_arraycopy;
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129
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130 // arraycopy operands aligned on zero'th element boundary
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131 // These are identical to the ones aligned aligned on an
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132 // element type boundary, except that they assume that both
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133 // source and destination are HeapWord aligned.
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134 static address _arrayof_jbyte_arraycopy;
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135 static address _arrayof_jshort_arraycopy;
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136 static address _arrayof_jint_arraycopy;
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137 static address _arrayof_jlong_arraycopy;
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138 static address _arrayof_oop_arraycopy;
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139 static address _arrayof_jbyte_disjoint_arraycopy;
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140 static address _arrayof_jshort_disjoint_arraycopy;
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141 static address _arrayof_jint_disjoint_arraycopy;
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142 static address _arrayof_jlong_disjoint_arraycopy;
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143 static address _arrayof_oop_disjoint_arraycopy;
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144
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145 // these are recommended but optional:
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146 static address _checkcast_arraycopy;
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147 static address _unsafe_arraycopy;
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148 static address _generic_arraycopy;
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149
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150 public:
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151 // Initialization/Testing
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152 static void initialize1(); // must happen before universe::genesis
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153 static void initialize2(); // must happen after universe::genesis
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154
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155 static bool contains(address addr) {
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156 return
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157 (_code1 != NULL && _code1->blob_contains(addr)) ||
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158 (_code2 != NULL && _code2->blob_contains(addr)) ;
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159 }
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160
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161 // Debugging
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162 static jint verify_oop_count() { return _verify_oop_count; }
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163 static jint* verify_oop_count_addr() { return &_verify_oop_count; }
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164 // a subroutine for debugging the GC
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165 static address verify_oop_subroutine_entry_address() { return (address)&_verify_oop_subroutine_entry; }
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166
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167 static address catch_exception_entry() { return _catch_exception_entry; }
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168
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169 // Calls to Java
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170 typedef void (*CallStub)(
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171 address link,
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172 intptr_t* result,
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173 BasicType result_type,
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174 methodOopDesc* method,
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175 address entry_point,
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176 intptr_t* parameters,
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177 int size_of_parameters,
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178 TRAPS
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179 );
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180
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181 static CallStub call_stub() { return CAST_TO_FN_PTR(CallStub, _call_stub_entry); }
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182
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183 // Exceptions
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184 static address forward_exception_entry() { return _forward_exception_entry; }
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185 // Implicit exceptions
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186 static address throw_AbstractMethodError_entry() { return _throw_AbstractMethodError_entry; }
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187 static address throw_ArithmeticException_entry() { return _throw_ArithmeticException_entry; }
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188 static address throw_NullPointerException_entry() { return _throw_NullPointerException_entry; }
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189 static address throw_NullPointerException_at_call_entry(){ return _throw_NullPointerException_at_call_entry; }
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190 static address throw_StackOverflowError_entry() { return _throw_StackOverflowError_entry; }
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191
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192 // Exceptions during unsafe access - should throw Java exception rather
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193 // than crash.
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194 static address handler_for_unsafe_access() { return _handler_for_unsafe_access_entry; }
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195
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196 static address atomic_xchg_entry() { return _atomic_xchg_entry; }
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197 static address atomic_xchg_ptr_entry() { return _atomic_xchg_ptr_entry; }
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198 static address atomic_store_entry() { return _atomic_store_entry; }
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199 static address atomic_store_ptr_entry() { return _atomic_store_ptr_entry; }
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200 static address atomic_cmpxchg_entry() { return _atomic_cmpxchg_entry; }
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201 static address atomic_cmpxchg_ptr_entry() { return _atomic_cmpxchg_ptr_entry; }
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202 static address atomic_cmpxchg_long_entry() { return _atomic_cmpxchg_long_entry; }
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203 static address atomic_add_entry() { return _atomic_add_entry; }
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204 static address atomic_add_ptr_entry() { return _atomic_add_ptr_entry; }
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205 static address fence_entry() { return _fence_entry; }
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206
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207 static address d2i_wrapper() { return _d2i_wrapper; }
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208 static address d2l_wrapper() { return _d2l_wrapper; }
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209 static jint fpu_cntrl_wrd_std() { return _fpu_cntrl_wrd_std; }
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210 static address addr_fpu_cntrl_wrd_std() { return (address)&_fpu_cntrl_wrd_std; }
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211 static address addr_fpu_cntrl_wrd_24() { return (address)&_fpu_cntrl_wrd_24; }
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212 static address addr_fpu_cntrl_wrd_64() { return (address)&_fpu_cntrl_wrd_64; }
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213 static address addr_fpu_cntrl_wrd_trunc() { return (address)&_fpu_cntrl_wrd_trunc; }
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214 static address addr_mxcsr_std() { return (address)&_mxcsr_std; }
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215 static address addr_fpu_subnormal_bias1() { return (address)&_fpu_subnormal_bias1; }
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216 static address addr_fpu_subnormal_bias2() { return (address)&_fpu_subnormal_bias2; }
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217
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218
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219 static address jbyte_arraycopy() { return _jbyte_arraycopy; }
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220 static address jshort_arraycopy() { return _jshort_arraycopy; }
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221 static address jint_arraycopy() { return _jint_arraycopy; }
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222 static address jlong_arraycopy() { return _jlong_arraycopy; }
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223 static address oop_arraycopy() { return _oop_arraycopy; }
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224 static address jbyte_disjoint_arraycopy() { return _jbyte_disjoint_arraycopy; }
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225 static address jshort_disjoint_arraycopy() { return _jshort_disjoint_arraycopy; }
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226 static address jint_disjoint_arraycopy() { return _jint_disjoint_arraycopy; }
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227 static address jlong_disjoint_arraycopy() { return _jlong_disjoint_arraycopy; }
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228 static address oop_disjoint_arraycopy() { return _oop_disjoint_arraycopy; }
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229
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230 static address arrayof_jbyte_arraycopy() { return _arrayof_jbyte_arraycopy; }
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231 static address arrayof_jshort_arraycopy() { return _arrayof_jshort_arraycopy; }
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232 static address arrayof_jint_arraycopy() { return _arrayof_jint_arraycopy; }
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233 static address arrayof_jlong_arraycopy() { return _arrayof_jlong_arraycopy; }
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234 static address arrayof_oop_arraycopy() { return _arrayof_oop_arraycopy; }
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235
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236 static address arrayof_jbyte_disjoint_arraycopy() { return _arrayof_jbyte_disjoint_arraycopy; }
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237 static address arrayof_jshort_disjoint_arraycopy() { return _arrayof_jshort_disjoint_arraycopy; }
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238 static address arrayof_jint_disjoint_arraycopy() { return _arrayof_jint_disjoint_arraycopy; }
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239 static address arrayof_jlong_disjoint_arraycopy() { return _arrayof_jlong_disjoint_arraycopy; }
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240 static address arrayof_oop_disjoint_arraycopy() { return _arrayof_oop_disjoint_arraycopy; }
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241
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242 static address checkcast_arraycopy() { return _checkcast_arraycopy; }
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243 static address unsafe_arraycopy() { return _unsafe_arraycopy; }
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244 static address generic_arraycopy() { return _generic_arraycopy; }
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245
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246 //
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247 // Default versions of the above arraycopy functions for platforms which do
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248 // not have specialized versions
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249 //
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250 static void jbyte_copy (jbyte* src, jbyte* dest, size_t count);
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251 static void jshort_copy(jshort* src, jshort* dest, size_t count);
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252 static void jint_copy (jint* src, jint* dest, size_t count);
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253 static void jlong_copy (jlong* src, jlong* dest, size_t count);
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254 static void oop_copy (oop* src, oop* dest, size_t count);
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255
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256 static void arrayof_jbyte_copy (HeapWord* src, HeapWord* dest, size_t count);
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257 static void arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count);
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258 static void arrayof_jint_copy (HeapWord* src, HeapWord* dest, size_t count);
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259 static void arrayof_jlong_copy (HeapWord* src, HeapWord* dest, size_t count);
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260 static void arrayof_oop_copy (HeapWord* src, HeapWord* dest, size_t count);
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261 };
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