// Copyright 2006-2008 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_MACRO_ASSEMBLER_ARM_H_ #define V8_MACRO_ASSEMBLER_ARM_H_ #include "assembler.h" namespace v8 { namespace internal { // Give alias names to registers extern Register cp; // JavaScript context pointer extern Register pp; // parameter pointer // Helper types to make boolean flag easier to read at call-site. enum InvokeFlag { CALL_FUNCTION, JUMP_FUNCTION }; enum InvokeJSFlags { CALL_JS, JUMP_JS }; enum ExitJSFlag { RETURN, DO_NOT_RETURN }; enum CodeLocation { IN_JAVASCRIPT, IN_JS_ENTRY, IN_C_ENTRY }; enum HandlerType { TRY_CATCH_HANDLER, TRY_FINALLY_HANDLER, JS_ENTRY_HANDLER }; // MacroAssembler implements a collection of frequently used macros. class MacroAssembler: public Assembler { public: MacroAssembler(void* buffer, int size); // --------------------------------------------------------------------------- // Low-level helpers for compiler // Jump, Call, and Ret pseudo instructions implementing inter-working private: void Jump(intptr_t target, RelocInfo::Mode rmode, Condition cond = al); void Call(intptr_t target, RelocInfo::Mode rmode, Condition cond = al); public: void Jump(Register target, Condition cond = al); void Jump(byte* target, RelocInfo::Mode rmode, Condition cond = al); void Jump(Handle code, RelocInfo::Mode rmode, Condition cond = al); void Call(Register target, Condition cond = al); void Call(byte* target, RelocInfo::Mode rmode, Condition cond = al); void Call(Handle code, RelocInfo::Mode rmode, Condition cond = al); void Ret(Condition cond = al); // Jumps to the label at the index given by the Smi in "index". void SmiJumpTable(Register index, Vector targets); // Sets the remembered set bit for [address+offset], where address is the // address of the heap object 'object'. The address must be in the first 8K // of an allocated page. The 'scratch' register is used in the // implementation and all 3 registers are clobbered by the operation, as // well as the ip register. void RecordWrite(Register object, Register offset, Register scratch); // --------------------------------------------------------------------------- // 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 r0 and // the builtin function to call in register r1. Exits with argc in // r4, argv in r6, and and the builtin function to call in r5. void EnterExitFrame(StackFrame::Type type); // Leave the current exit frame. Expects the return value in r0. void LeaveExitFrame(StackFrame::Type type); // --------------------------------------------------------------------------- // JavaScript invokes // Invoke the JavaScript function code by either calling or jumping. void InvokeCode(Register code, const ParameterCount& expected, const ParameterCount& actual, InvokeFlag flag); void InvokeCode(Handle 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); #ifdef ENABLE_DEBUGGER_SUPPORT // --------------------------------------------------------------------------- // Debugger Support void SaveRegistersToMemory(RegList regs); void RestoreRegistersFromMemory(RegList regs); void CopyRegistersFromMemoryToStack(Register base, RegList regs); void CopyRegistersFromStackToMemory(Register base, Register scratch, RegList regs); #endif // --------------------------------------------------------------------------- // Exception handling // Push a new try handler and link into try handler chain. // The return address must be passed in register lr. // On exit, r0 contains TOS (code slot). 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, whereas both scratch registers are clobbered. void CheckAccessGlobalProxy(Register holder_reg, Register scratch, Label* miss); // --------------------------------------------------------------------------- // Support functions. // 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); void CallJSExitStub(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 fid, int num_arguments); // Tail call of a runtime routine (jump). // Like JumpToBuiltin, but also takes care of passing the number // of parameters. void TailCallRuntime(const ExternalReference& ext, int num_arguments); // Jump to the builtin routine. void JumpToBuiltin(const ExternalReference& builtin); // Invoke specified builtin JavaScript function. Adds an entry to // the unresolved list if the name does not resolve. void InvokeBuiltin(Builtins::JavaScript id, InvokeJSFlags flags); // Store the code object for the given builtin in the target register and // setup the function in r1. void GetBuiltinEntry(Register target, Builtins::JavaScript id); struct Unresolved { int pc; uint32_t flags; // see Bootstrapper::FixupFlags decoders/encoders. const char* name; }; List* unresolved() { return &unresolved_; } Handle CodeObject() { return code_object_; } // --------------------------------------------------------------------------- // StatsCounter support void SetCounter(StatsCounter* counter, int value, Register scratch1, Register scratch2); void IncrementCounter(StatsCounter* counter, int value, Register scratch1, Register scratch2); void DecrementCounter(StatsCounter* counter, int value, Register scratch1, Register scratch2); // --------------------------------------------------------------------------- // 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_; bool generating_stub_; bool allow_stub_calls_; Handle 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_constant, Register code_reg, Label* done, InvokeFlag flag); // Get the code for the given builtin. Returns if able to resolve // the function in the 'resolved' flag. Handle ResolveBuiltin(Builtins::JavaScript id, bool* resolved); // Activation support. void EnterFrame(StackFrame::Type type); void LeaveFrame(StackFrame::Type type); }; // ----------------------------------------------------------------------------- // Static helper functions. // Generate a MemOperand for loading a field from an object. static inline MemOperand FieldMemOperand(Register object, int offset) { return MemOperand(object, offset - kHeapObjectTag); } } } // namespace v8::internal #endif // V8_MACRO_ASSEMBLER_ARM_H_