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Diffstat (limited to 'V8Binding/v8/src/arm/macro-assembler-arm.h')
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diff --git a/V8Binding/v8/src/arm/macro-assembler-arm.h b/V8Binding/v8/src/arm/macro-assembler-arm.h new file mode 100644 index 0000000..27eeab2 --- /dev/null +++ b/V8Binding/v8/src/arm/macro-assembler-arm.h @@ -0,0 +1,314 @@ +// 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_ARM_MACRO_ASSEMBLER_ARM_H_ +#define V8_ARM_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> 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> 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<Label*> 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> 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>* unresolved() { return &unresolved_; } + + Handle<Object> 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> 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, + 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<Code> 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); +} + + +#ifdef GENERATED_CODE_COVERAGE +#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) masm->stop(__FILE_LINE__); masm-> +#else +#define ACCESS_MASM(masm) masm-> +#endif + + +} } // namespace v8::internal + +#endif // V8_ARM_MACRO_ASSEMBLER_ARM_H_ |