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| 1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | |
| 2 // Redistribution and use in source and binary forms, with or without | |
| 3 // modification, are permitted provided that the following conditions are | |
| 4 // met: | |
| 5 // | |
| 6 // * Redistributions of source code must retain the above copyright | |
| 7 // notice, this list of conditions and the following disclaimer. | |
| 8 // * Redistributions in binary form must reproduce the above | |
| 9 // copyright notice, this list of conditions and the following | |
| 10 // disclaimer in the documentation and/or other materials provided | |
| 11 // with the distribution. | |
| 12 // * Neither the name of Google Inc. nor the names of its | |
| 13 // contributors may be used to endorse or promote products derived | |
| 14 // from this software without specific prior written permission. | |
| 15 // | |
| 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 27 | |
| 28 #ifndef V8_MACRO_ASSEMBLER_IA32_H_ | |
| 29 #define V8_MACRO_ASSEMBLER_IA32_H_ | |
| 30 | |
| 31 #include "assembler.h" | |
| 32 | |
| 33 namespace v8 { namespace internal { | |
| 34 | |
| 35 // Forward declaration. | |
| 36 class JumpTarget; | |
| 37 | |
| 38 | |
| 39 // Helper types to make flags easier to read at call sites. | |
| 40 enum InvokeFlag { | |
| 41 CALL_FUNCTION, | |
| 42 JUMP_FUNCTION | |
| 43 }; | |
| 44 | |
| 45 enum CodeLocation { | |
| 46 IN_JAVASCRIPT, | |
| 47 IN_JS_ENTRY, | |
| 48 IN_C_ENTRY | |
| 49 }; | |
| 50 | |
| 51 enum HandlerType { | |
| 52 TRY_CATCH_HANDLER, | |
| 53 TRY_FINALLY_HANDLER, | |
| 54 JS_ENTRY_HANDLER | |
| 55 }; | |
| 56 | |
| 57 | |
| 58 // MacroAssembler implements a collection of frequently used macros. | |
| 59 class MacroAssembler: public Assembler { | |
| 60 public: | |
| 61 MacroAssembler(void* buffer, int size); | |
| 62 | |
| 63 // --------------------------------------------------------------------------- | |
| 64 // GC Support | |
| 65 | |
| 66 // Set the remembered set bit for [object+offset]. | |
| 67 // object is the object being stored into, value is the object being stored. | |
| 68 // If offset is zero, then the scratch register contains the array index into | |
| 69 // the elements array represented as a Smi. | |
| 70 // All registers are clobbered by the operation. | |
| 71 void RecordWrite(Register object, | |
| 72 int offset, | |
| 73 Register value, | |
| 74 Register scratch); | |
| 75 | |
| 76 #ifdef ENABLE_DEBUGGER_SUPPORT | |
| 77 // --------------------------------------------------------------------------- | |
| 78 // Debugger Support | |
| 79 | |
| 80 void SaveRegistersToMemory(RegList regs); | |
| 81 void RestoreRegistersFromMemory(RegList regs); | |
| 82 void PushRegistersFromMemory(RegList regs); | |
| 83 void PopRegistersToMemory(RegList regs); | |
| 84 void CopyRegistersFromStackToMemory(Register base, | |
| 85 Register scratch, | |
| 86 RegList regs); | |
| 87 #endif | |
| 88 | |
| 89 // --------------------------------------------------------------------------- | |
| 90 // Activation frames | |
| 91 | |
| 92 void EnterInternalFrame() { EnterFrame(StackFrame::INTERNAL); } | |
| 93 void LeaveInternalFrame() { LeaveFrame(StackFrame::INTERNAL); } | |
| 94 | |
| 95 void EnterConstructFrame() { EnterFrame(StackFrame::CONSTRUCT); } | |
| 96 void LeaveConstructFrame() { LeaveFrame(StackFrame::CONSTRUCT); } | |
| 97 | |
| 98 // Enter specific kind of exit frame; either EXIT or | |
| 99 // EXIT_DEBUG. Expects the number of arguments in register eax and | |
| 100 // sets up the number of arguments in register edi and the pointer | |
| 101 // to the first argument in register esi. | |
| 102 void EnterExitFrame(StackFrame::Type type); | |
| 103 | |
| 104 // Leave the current exit frame. Expects the return value in | |
| 105 // register eax:edx (untouched) and the pointer to the first | |
| 106 // argument in register esi. | |
| 107 void LeaveExitFrame(StackFrame::Type type); | |
| 108 | |
| 109 | |
| 110 // --------------------------------------------------------------------------- | |
| 111 // JavaScript invokes | |
| 112 | |
| 113 // Invoke the JavaScript function code by either calling or jumping. | |
| 114 void InvokeCode(const Operand& code, | |
| 115 const ParameterCount& expected, | |
| 116 const ParameterCount& actual, | |
| 117 InvokeFlag flag); | |
| 118 | |
| 119 void InvokeCode(Handle<Code> code, | |
| 120 const ParameterCount& expected, | |
| 121 const ParameterCount& actual, | |
| 122 RelocInfo::Mode rmode, | |
| 123 InvokeFlag flag); | |
| 124 | |
| 125 // Invoke the JavaScript function in the given register. Changes the | |
| 126 // current context to the context in the function before invoking. | |
| 127 void InvokeFunction(Register function, | |
| 128 const ParameterCount& actual, | |
| 129 InvokeFlag flag); | |
| 130 | |
| 131 // Invoke specified builtin JavaScript function. Adds an entry to | |
| 132 // the unresolved list if the name does not resolve. | |
| 133 void InvokeBuiltin(Builtins::JavaScript id, InvokeFlag flag); | |
| 134 | |
| 135 // Store the code object for the given builtin in the target register. | |
| 136 void GetBuiltinEntry(Register target, Builtins::JavaScript id); | |
| 137 | |
| 138 // Expression support | |
| 139 void Set(Register dst, const Immediate& x); | |
| 140 void Set(const Operand& dst, const Immediate& x); | |
| 141 | |
| 142 // Compare object type for heap object. | |
| 143 // Incoming register is heap_object and outgoing register is map. | |
| 144 void CmpObjectType(Register heap_object, InstanceType type, Register map); | |
| 145 | |
| 146 // Compare instance type for map. | |
| 147 void CmpInstanceType(Register map, InstanceType type); | |
| 148 | |
| 149 // FCmp is similar to integer cmp, but requires unsigned | |
| 150 // jcc instructions (je, ja, jae, jb, jbe, je, and jz). | |
| 151 void FCmp(); | |
| 152 | |
| 153 // --------------------------------------------------------------------------- | |
| 154 // Exception handling | |
| 155 | |
| 156 // Push a new try handler and link into try handler chain. | |
| 157 // The return address must be pushed before calling this helper. | |
| 158 // On exit, eax contains TOS (next_sp). | |
| 159 void PushTryHandler(CodeLocation try_location, HandlerType type); | |
| 160 | |
| 161 | |
| 162 // --------------------------------------------------------------------------- | |
| 163 // Inline caching support | |
| 164 | |
| 165 // Generates code that verifies that the maps of objects in the | |
| 166 // prototype chain of object hasn't changed since the code was | |
| 167 // generated and branches to the miss label if any map has. If | |
| 168 // necessary the function also generates code for security check | |
| 169 // in case of global object holders. The scratch and holder | |
| 170 // registers are always clobbered, but the object register is only | |
| 171 // clobbered if it the same as the holder register. The function | |
| 172 // returns a register containing the holder - either object_reg or | |
| 173 // holder_reg. | |
| 174 Register CheckMaps(JSObject* object, Register object_reg, | |
| 175 JSObject* holder, Register holder_reg, | |
| 176 Register scratch, Label* miss); | |
| 177 | |
| 178 // Generate code for checking access rights - used for security checks | |
| 179 // on access to global objects across environments. The holder register | |
| 180 // is left untouched, but the scratch register is clobbered. | |
| 181 void CheckAccessGlobalProxy(Register holder_reg, | |
| 182 Register scratch, | |
| 183 Label* miss); | |
| 184 | |
| 185 | |
| 186 // --------------------------------------------------------------------------- | |
| 187 // Support functions. | |
| 188 | |
| 189 // Check if result is zero and op is negative. | |
| 190 void NegativeZeroTest(Register result, Register op, Label* then_label); | |
| 191 | |
| 192 // Check if result is zero and op is negative in code using jump targets. | |
| 193 void NegativeZeroTest(CodeGenerator* cgen, | |
| 194 Register result, | |
| 195 Register op, | |
| 196 JumpTarget* then_target); | |
| 197 | |
| 198 // Check if result is zero and any of op1 and op2 are negative. | |
| 199 // Register scratch is destroyed, and it must be different from op2. | |
| 200 void NegativeZeroTest(Register result, Register op1, Register op2, | |
| 201 Register scratch, Label* then_label); | |
| 202 | |
| 203 // Try to get function prototype of a function and puts the value in | |
| 204 // the result register. Checks that the function really is a | |
| 205 // function and jumps to the miss label if the fast checks fail. The | |
| 206 // function register will be untouched; the other registers may be | |
| 207 // clobbered. | |
| 208 void TryGetFunctionPrototype(Register function, | |
| 209 Register result, | |
| 210 Register scratch, | |
| 211 Label* miss); | |
| 212 | |
| 213 // Generates code for reporting that an illegal operation has | |
| 214 // occurred. | |
| 215 void IllegalOperation(int num_arguments); | |
| 216 | |
| 217 // --------------------------------------------------------------------------- | |
| 218 // Runtime calls | |
| 219 | |
| 220 // Call a code stub. | |
| 221 void CallStub(CodeStub* stub); | |
| 222 | |
| 223 // Return from a code stub after popping its arguments. | |
| 224 void StubReturn(int argc); | |
| 225 | |
| 226 // Call a runtime routine. | |
| 227 // Eventually this should be used for all C calls. | |
| 228 void CallRuntime(Runtime::Function* f, int num_arguments); | |
| 229 | |
| 230 // Convenience function: Same as above, but takes the fid instead. | |
| 231 void CallRuntime(Runtime::FunctionId id, int num_arguments); | |
| 232 | |
| 233 // Tail call of a runtime routine (jump). | |
| 234 // Like JumpToBuiltin, but also takes care of passing the number | |
| 235 // of arguments. | |
| 236 void TailCallRuntime(const ExternalReference& ext, int num_arguments); | |
| 237 | |
| 238 // Jump to the builtin routine. | |
| 239 void JumpToBuiltin(const ExternalReference& ext); | |
| 240 | |
| 241 | |
| 242 // --------------------------------------------------------------------------- | |
| 243 // Utilities | |
| 244 | |
| 245 void Ret(); | |
| 246 | |
| 247 struct Unresolved { | |
| 248 int pc; | |
| 249 uint32_t flags; // see Bootstrapper::FixupFlags decoders/encoders. | |
| 250 const char* name; | |
| 251 }; | |
| 252 List<Unresolved>* unresolved() { return &unresolved_; } | |
| 253 | |
| 254 Handle<Object> CodeObject() { return code_object_; } | |
| 255 | |
| 256 | |
| 257 // --------------------------------------------------------------------------- | |
| 258 // StatsCounter support | |
| 259 | |
| 260 void SetCounter(StatsCounter* counter, int value); | |
| 261 void IncrementCounter(StatsCounter* counter, int value); | |
| 262 void DecrementCounter(StatsCounter* counter, int value); | |
| 263 | |
| 264 | |
| 265 // --------------------------------------------------------------------------- | |
| 266 // Debugging | |
| 267 | |
| 268 // Calls Abort(msg) if the condition cc is not satisfied. | |
| 269 // Use --debug_code to enable. | |
| 270 void Assert(Condition cc, const char* msg); | |
| 271 | |
| 272 // Like Assert(), but always enabled. | |
| 273 void Check(Condition cc, const char* msg); | |
| 274 | |
| 275 // Print a message to stdout and abort execution. | |
| 276 void Abort(const char* msg); | |
| 277 | |
| 278 // Verify restrictions about code generated in stubs. | |
| 279 void set_generating_stub(bool value) { generating_stub_ = value; } | |
| 280 bool generating_stub() { return generating_stub_; } | |
| 281 void set_allow_stub_calls(bool value) { allow_stub_calls_ = value; } | |
| 282 bool allow_stub_calls() { return allow_stub_calls_; } | |
| 283 | |
| 284 private: | |
| 285 List<Unresolved> unresolved_; | |
| 286 bool generating_stub_; | |
| 287 bool allow_stub_calls_; | |
| 288 Handle<Object> code_object_; // This handle will be patched with the code | |
| 289 // code object on installation. | |
| 290 | |
| 291 // Helper functions for generating invokes. | |
| 292 void InvokePrologue(const ParameterCount& expected, | |
| 293 const ParameterCount& actual, | |
| 294 Handle<Code> code_constant, | |
| 295 const Operand& code_operand, | |
| 296 Label* done, | |
| 297 InvokeFlag flag); | |
| 298 | |
| 299 // Get the code for the given builtin. Returns if able to resolve | |
| 300 // the function in the 'resolved' flag. | |
| 301 Handle<Code> ResolveBuiltin(Builtins::JavaScript id, bool* resolved); | |
| 302 | |
| 303 // Activation support. | |
| 304 void EnterFrame(StackFrame::Type type); | |
| 305 void LeaveFrame(StackFrame::Type type); | |
| 306 }; | |
| 307 | |
| 308 | |
| 309 // The code patcher is used to patch (typically) small parts of code e.g. for | |
| 310 // debugging and other types of instrumentation. When using the code patcher | |
| 311 // the exact number of bytes specified must be emitted. Is not legal to emit | |
| 312 // relocation information. If any of these constraints are violated it causes | |
| 313 // an assertion. | |
| 314 class CodePatcher { | |
| 315 public: | |
| 316 CodePatcher(byte* address, int size); | |
| 317 virtual ~CodePatcher(); | |
| 318 | |
| 319 // Macro assembler to emit code. | |
| 320 MacroAssembler* masm() { return &masm_; } | |
| 321 | |
| 322 private: | |
| 323 byte* address_; // The address of the code being patched. | |
| 324 int size_; // Number of bytes of the expected patch size. | |
| 325 MacroAssembler masm_; // Macro assembler used to generate the code. | |
| 326 }; | |
| 327 | |
| 328 | |
| 329 // ----------------------------------------------------------------------------- | |
| 330 // Static helper functions. | |
| 331 | |
| 332 // Generate an Operand for loading a field from an object. | |
| 333 static inline Operand FieldOperand(Register object, int offset) { | |
| 334 return Operand(object, offset - kHeapObjectTag); | |
| 335 } | |
| 336 | |
| 337 | |
| 338 // Generate an Operand for loading an indexed field from an object. | |
| 339 static inline Operand FieldOperand(Register object, | |
| 340 Register index, | |
| 341 ScaleFactor scale, | |
| 342 int offset) { | |
| 343 return Operand(object, index, scale, offset - kHeapObjectTag); | |
| 344 } | |
| 345 | |
| 346 | |
| 347 #ifdef GENERATED_CODE_COVERAGE | |
| 348 extern void LogGeneratedCodeCoverage(const char* file_line); | |
| 349 #define CODE_COVERAGE_STRINGIFY(x) #x | |
| 350 #define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x) | |
| 351 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__) | |
| 352 #define ACCESS_MASM(masm) { \ | |
| 353 byte* ia32_coverage_function = \ | |
| 354 reinterpret_cast<byte*>(FUNCTION_ADDR(LogGeneratedCodeCoverage)); \ | |
| 355 masm->pushfd(); \ | |
| 356 masm->pushad(); \ | |
| 357 masm->push(Immediate(reinterpret_cast<int>(&__FILE_LINE__))); \ | |
| 358 masm->call(ia32_coverage_function, RelocInfo::RUNTIME_ENTRY); \ | |
| 359 masm->pop(eax); \ | |
| 360 masm->popad(); \ | |
| 361 masm->popfd(); \ | |
| 362 } \ | |
| 363 masm-> | |
| 364 #else | |
| 365 #define ACCESS_MASM(masm) masm-> | |
| 366 #endif | |
| 367 | |
| 368 | |
| 369 } } // namespace v8::internal | |
| 370 | |
| 371 #endif // V8_MACRO_ASSEMBLER_IA32_H_ | |
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Chromium Code Reviews
Issue 92068:
Move backend specific files to separate directories. (Closed)
