| // Copyright 2006-2009 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #ifndef V8_IA32_MACRO_ASSEMBLER_IA32_H_ |
| #define V8_IA32_MACRO_ASSEMBLER_IA32_H_ |
| |
| #include "assembler.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // Forward declaration. |
| class JumpTarget; |
| |
| |
| // MacroAssembler implements a collection of frequently used macros. |
| class MacroAssembler: public Assembler { |
| public: |
| MacroAssembler(void* buffer, int size); |
| |
| // --------------------------------------------------------------------------- |
| // GC Support |
| |
| // Set the remembered set bit for [object+offset]. |
| // object is the object being stored into, value is the object being stored. |
| // If offset is zero, then the scratch register contains the array index into |
| // the elements array represented as a Smi. |
| // All registers are clobbered by the operation. |
| void RecordWrite(Register object, |
| int offset, |
| Register value, |
| Register scratch); |
| |
| #ifdef ENABLE_DEBUGGER_SUPPORT |
| // --------------------------------------------------------------------------- |
| // Debugger Support |
| |
| void SaveRegistersToMemory(RegList regs); |
| void RestoreRegistersFromMemory(RegList regs); |
| void PushRegistersFromMemory(RegList regs); |
| void PopRegistersToMemory(RegList regs); |
| void CopyRegistersFromStackToMemory(Register base, |
| Register scratch, |
| RegList regs); |
| #endif |
| |
| // --------------------------------------------------------------------------- |
| // Activation frames |
| |
| void EnterInternalFrame() { EnterFrame(StackFrame::INTERNAL); } |
| void LeaveInternalFrame() { LeaveFrame(StackFrame::INTERNAL); } |
| |
| void EnterConstructFrame() { EnterFrame(StackFrame::CONSTRUCT); } |
| void LeaveConstructFrame() { LeaveFrame(StackFrame::CONSTRUCT); } |
| |
| // Enter specific kind of exit frame; either EXIT or |
| // EXIT_DEBUG. Expects the number of arguments in register eax and |
| // sets up the number of arguments in register edi and the pointer |
| // to the first argument in register esi. |
| void EnterExitFrame(StackFrame::Type type); |
| |
| // Leave the current exit frame. Expects the return value in |
| // register eax:edx (untouched) and the pointer to the first |
| // argument in register esi. |
| void LeaveExitFrame(StackFrame::Type type); |
| |
| |
| // --------------------------------------------------------------------------- |
| // JavaScript invokes |
| |
| // Invoke the JavaScript function code by either calling or jumping. |
| void InvokeCode(const Operand& code, |
| const ParameterCount& expected, |
| const ParameterCount& actual, |
| InvokeFlag flag); |
| |
| void InvokeCode(Handle<Code> code, |
| const ParameterCount& expected, |
| const ParameterCount& actual, |
| RelocInfo::Mode rmode, |
| InvokeFlag flag); |
| |
| // Invoke the JavaScript function in the given register. Changes the |
| // current context to the context in the function before invoking. |
| void InvokeFunction(Register function, |
| const ParameterCount& actual, |
| InvokeFlag flag); |
| |
| // Invoke specified builtin JavaScript function. Adds an entry to |
| // the unresolved list if the name does not resolve. |
| void InvokeBuiltin(Builtins::JavaScript id, InvokeFlag flag); |
| |
| // Store the code object for the given builtin in the target register. |
| void GetBuiltinEntry(Register target, Builtins::JavaScript id); |
| |
| // Expression support |
| void Set(Register dst, const Immediate& x); |
| void Set(const Operand& dst, const Immediate& x); |
| |
| // Compare object type for heap object. |
| // Incoming register is heap_object and outgoing register is map. |
| void CmpObjectType(Register heap_object, InstanceType type, Register map); |
| |
| // Compare instance type for map. |
| void CmpInstanceType(Register map, InstanceType type); |
| |
| // FCmp is similar to integer cmp, but requires unsigned |
| // jcc instructions (je, ja, jae, jb, jbe, je, and jz). |
| void FCmp(); |
| |
| // --------------------------------------------------------------------------- |
| // Exception handling |
| |
| // Push a new try handler and link into try handler chain. The return |
| // address must be pushed before calling this helper. |
| void PushTryHandler(CodeLocation try_location, HandlerType type); |
| |
| |
| // --------------------------------------------------------------------------- |
| // Inline caching support |
| |
| // Generates code that verifies that the maps of objects in the |
| // prototype chain of object hasn't changed since the code was |
| // generated and branches to the miss label if any map has. If |
| // necessary the function also generates code for security check |
| // in case of global object holders. The scratch and holder |
| // registers are always clobbered, but the object register is only |
| // clobbered if it the same as the holder register. The function |
| // returns a register containing the holder - either object_reg or |
| // holder_reg. |
| Register CheckMaps(JSObject* object, Register object_reg, |
| JSObject* holder, Register holder_reg, |
| Register scratch, Label* miss); |
| |
| // Generate code for checking access rights - used for security checks |
| // on access to global objects across environments. The holder register |
| // is left untouched, but the scratch register is clobbered. |
| void CheckAccessGlobalProxy(Register holder_reg, |
| Register scratch, |
| Label* miss); |
| |
| |
| // --------------------------------------------------------------------------- |
| // Allocation support |
| |
| // Allocate an object in new space. If the new space is exhausted control |
| // continues at the gc_required label. The allocated object is returned in |
| // result and end of the new object is returned in result_end. The register |
| // scratch can be passed as no_reg in which case an additional object |
| // reference will be added to the reloc info. The returned pointers in result |
| // and result_end have not yet been tagged as heap objects. If |
| // result_contains_top_on_entry is true the contnt of result is known to be |
| // the allocation top on entry (could be result_end from a previous call to |
| // AllocateObjectInNewSpace). If result_contains_top_on_entry is true scratch |
| // should be no_reg as it is never used. |
| void AllocateObjectInNewSpace(int object_size, |
| Register result, |
| Register result_end, |
| Register scratch, |
| Label* gc_required, |
| AllocationFlags flags); |
| |
| void AllocateObjectInNewSpace(int header_size, |
| ScaleFactor element_size, |
| Register element_count, |
| Register result, |
| Register result_end, |
| Register scratch, |
| Label* gc_required, |
| AllocationFlags flags); |
| |
| void AllocateObjectInNewSpace(Register object_size, |
| Register result, |
| Register result_end, |
| Register scratch, |
| Label* gc_required, |
| AllocationFlags flags); |
| |
| // Undo allocation in new space. The object passed and objects allocated after |
| // it will no longer be allocated. Make sure that no pointers are left to the |
| // object(s) no longer allocated as they would be invalid when allocation is |
| // un-done. |
| void UndoAllocationInNewSpace(Register object); |
| |
| // --------------------------------------------------------------------------- |
| // Support functions. |
| |
| // Check if result is zero and op is negative. |
| void NegativeZeroTest(Register result, Register op, Label* then_label); |
| |
| // Check if result is zero and op is negative in code using jump targets. |
| void NegativeZeroTest(CodeGenerator* cgen, |
| Register result, |
| Register op, |
| JumpTarget* then_target); |
| |
| // Check if result is zero and any of op1 and op2 are negative. |
| // Register scratch is destroyed, and it must be different from op2. |
| void NegativeZeroTest(Register result, Register op1, Register op2, |
| Register scratch, Label* then_label); |
| |
| // Try to get function prototype of a function and puts the value in |
| // the result register. Checks that the function really is a |
| // function and jumps to the miss label if the fast checks fail. The |
| // function register will be untouched; the other registers may be |
| // clobbered. |
| void TryGetFunctionPrototype(Register function, |
| Register result, |
| Register scratch, |
| Label* miss); |
| |
| // Generates code for reporting that an illegal operation has |
| // occurred. |
| void IllegalOperation(int num_arguments); |
| |
| // --------------------------------------------------------------------------- |
| // Runtime calls |
| |
| // Call a code stub. |
| void CallStub(CodeStub* stub); |
| |
| // Return from a code stub after popping its arguments. |
| void StubReturn(int argc); |
| |
| // Call a runtime routine. |
| // Eventually this should be used for all C calls. |
| void CallRuntime(Runtime::Function* f, int num_arguments); |
| |
| // Convenience function: Same as above, but takes the fid instead. |
| void CallRuntime(Runtime::FunctionId id, int num_arguments); |
| |
| // Tail call of a runtime routine (jump). |
| // Like JumpToBuiltin, but also takes care of passing the number |
| // of arguments. |
| void TailCallRuntime(const ExternalReference& ext, |
| int num_arguments, |
| int result_size); |
| |
| // Jump to the builtin routine. |
| void JumpToBuiltin(const ExternalReference& ext); |
| |
| |
| // --------------------------------------------------------------------------- |
| // Utilities |
| |
| void Ret(); |
| |
| struct Unresolved { |
| int pc; |
| uint32_t flags; // see Bootstrapper::FixupFlags decoders/encoders. |
| const char* name; |
| }; |
| List<Unresolved>* unresolved() { return &unresolved_; } |
| |
| Handle<Object> CodeObject() { return code_object_; } |
| |
| |
| // --------------------------------------------------------------------------- |
| // StatsCounter support |
| |
| void SetCounter(StatsCounter* counter, int value); |
| void IncrementCounter(StatsCounter* counter, int value); |
| void DecrementCounter(StatsCounter* counter, int value); |
| |
| |
| // --------------------------------------------------------------------------- |
| // Debugging |
| |
| // Calls Abort(msg) if the condition cc is not satisfied. |
| // Use --debug_code to enable. |
| void Assert(Condition cc, const char* msg); |
| |
| // Like Assert(), but always enabled. |
| void Check(Condition cc, const char* msg); |
| |
| // Print a message to stdout and abort execution. |
| void Abort(const char* msg); |
| |
| // Verify restrictions about code generated in stubs. |
| void set_generating_stub(bool value) { generating_stub_ = value; } |
| bool generating_stub() { return generating_stub_; } |
| void set_allow_stub_calls(bool value) { allow_stub_calls_ = value; } |
| bool allow_stub_calls() { return allow_stub_calls_; } |
| |
| private: |
| List<Unresolved> unresolved_; |
| bool generating_stub_; |
| bool allow_stub_calls_; |
| Handle<Object> code_object_; // This handle will be patched with the |
| // code object on installation. |
| |
| // Helper functions for generating invokes. |
| void InvokePrologue(const ParameterCount& expected, |
| const ParameterCount& actual, |
| Handle<Code> code_constant, |
| const Operand& code_operand, |
| Label* done, |
| InvokeFlag flag); |
| |
| // Get the code for the given builtin. Returns if able to resolve |
| // the function in the 'resolved' flag. |
| Handle<Code> ResolveBuiltin(Builtins::JavaScript id, bool* resolved); |
| |
| // Activation support. |
| void EnterFrame(StackFrame::Type type); |
| void LeaveFrame(StackFrame::Type type); |
| |
| // Allocation support helpers. |
| void LoadAllocationTopHelper(Register result, |
| Register result_end, |
| Register scratch, |
| AllocationFlags flags); |
| void UpdateAllocationTopHelper(Register result_end, Register scratch); |
| }; |
| |
| |
| // The code patcher is used to patch (typically) small parts of code e.g. for |
| // debugging and other types of instrumentation. When using the code patcher |
| // the exact number of bytes specified must be emitted. Is not legal to emit |
| // relocation information. If any of these constraints are violated it causes |
| // an assertion. |
| class CodePatcher { |
| public: |
| CodePatcher(byte* address, int size); |
| virtual ~CodePatcher(); |
| |
| // Macro assembler to emit code. |
| MacroAssembler* masm() { return &masm_; } |
| |
| private: |
| byte* address_; // The address of the code being patched. |
| int size_; // Number of bytes of the expected patch size. |
| MacroAssembler masm_; // Macro assembler used to generate the code. |
| }; |
| |
| |
| // ----------------------------------------------------------------------------- |
| // Static helper functions. |
| |
| // Generate an Operand for loading a field from an object. |
| static inline Operand FieldOperand(Register object, int offset) { |
| return Operand(object, offset - kHeapObjectTag); |
| } |
| |
| |
| // Generate an Operand for loading an indexed field from an object. |
| static inline Operand FieldOperand(Register object, |
| Register index, |
| ScaleFactor scale, |
| int offset) { |
| return Operand(object, index, scale, offset - kHeapObjectTag); |
| } |
| |
| |
| #ifdef GENERATED_CODE_COVERAGE |
| extern void LogGeneratedCodeCoverage(const char* file_line); |
| #define CODE_COVERAGE_STRINGIFY(x) #x |
| #define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x) |
| #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__) |
| #define ACCESS_MASM(masm) { \ |
| byte* ia32_coverage_function = \ |
| reinterpret_cast<byte*>(FUNCTION_ADDR(LogGeneratedCodeCoverage)); \ |
| masm->pushfd(); \ |
| masm->pushad(); \ |
| masm->push(Immediate(reinterpret_cast<int>(&__FILE_LINE__))); \ |
| masm->call(ia32_coverage_function, RelocInfo::RUNTIME_ENTRY); \ |
| masm->pop(eax); \ |
| masm->popad(); \ |
| masm->popfd(); \ |
| } \ |
| masm-> |
| #else |
| #define ACCESS_MASM(masm) masm-> |
| #endif |
| |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_IA32_MACRO_ASSEMBLER_IA32_H_ |