2009-05-04 07:16:10 +00:00
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// Copyright 2009 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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2009-05-20 13:20:02 +00:00
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#include "v8.h"
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#include "bootstrapper.h"
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#include "codegen-inl.h"
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2009-06-10 09:48:15 +00:00
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#include "assembler-x64.h"
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2009-06-03 10:30:50 +00:00
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#include "macro-assembler-x64.h"
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2009-06-10 09:48:15 +00:00
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#include "debug.h"
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2009-05-20 13:20:02 +00:00
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2009-05-25 10:05:56 +00:00
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namespace v8 {
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namespace internal {
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2009-05-20 13:20:02 +00:00
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MacroAssembler::MacroAssembler(void* buffer, int size)
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: Assembler(buffer, size),
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unresolved_(0),
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generating_stub_(false),
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allow_stub_calls_(true),
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code_object_(Heap::undefined_value()) {
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}
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2009-06-04 11:54:14 +00:00
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2009-06-22 15:14:20 +00:00
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// TODO(x64): For now, the write barrier is disabled on x64 and we
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// therefore generate no code. This should be fixed when the write
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// barrier is enabled.
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void MacroAssembler::RecordWrite(Register object, int offset,
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Register value, Register scratch) {
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}
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2009-06-10 09:48:15 +00:00
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void MacroAssembler::Assert(Condition cc, const char* msg) {
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if (FLAG_debug_code) Check(cc, msg);
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}
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void MacroAssembler::Check(Condition cc, const char* msg) {
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Label L;
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j(cc, &L);
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Abort(msg);
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// will not return here
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bind(&L);
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}
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2009-06-17 11:50:33 +00:00
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void MacroAssembler::NegativeZeroTest(Register result,
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Register op,
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Label* then_label) {
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Label ok;
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testq(result, result);
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j(not_zero, &ok);
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testq(op, op);
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j(sign, then_label);
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bind(&ok);
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}
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2009-06-10 09:48:15 +00:00
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void MacroAssembler::Abort(const char* msg) {
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// We want to pass the msg string like a smi to avoid GC
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// problems, however msg is not guaranteed to be aligned
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// properly. Instead, we pass an aligned pointer that is
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// a proper v8 smi, but also pass the alignment difference
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// from the real pointer as a smi.
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intptr_t p1 = reinterpret_cast<intptr_t>(msg);
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intptr_t p0 = (p1 & ~kSmiTagMask) + kSmiTag;
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// Note: p0 might not be a valid Smi *value*, but it has a valid Smi tag.
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ASSERT(reinterpret_cast<Object*>(p0)->IsSmi());
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#ifdef DEBUG
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if (msg != NULL) {
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RecordComment("Abort message: ");
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RecordComment(msg);
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}
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#endif
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push(rax);
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movq(kScratchRegister, p0, RelocInfo::NONE);
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push(kScratchRegister);
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movq(kScratchRegister,
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reinterpret_cast<intptr_t>(Smi::FromInt(p1 - p0)),
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RelocInfo::NONE);
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push(kScratchRegister);
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CallRuntime(Runtime::kAbort, 2);
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// will not return here
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}
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2009-06-11 10:46:28 +00:00
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void MacroAssembler::CallStub(CodeStub* stub) {
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ASSERT(allow_stub_calls()); // calls are not allowed in some stubs
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movq(kScratchRegister, stub->GetCode(), RelocInfo::CODE_TARGET);
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call(kScratchRegister);
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}
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void MacroAssembler::StubReturn(int argc) {
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ASSERT(argc >= 1 && generating_stub());
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ret((argc - 1) * kPointerSize);
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}
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void MacroAssembler::IllegalOperation(int num_arguments) {
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if (num_arguments > 0) {
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addq(rsp, Immediate(num_arguments * kPointerSize));
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}
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movq(rax, Factory::undefined_value(), RelocInfo::EMBEDDED_OBJECT);
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2009-06-10 09:48:15 +00:00
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}
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2009-06-11 10:46:28 +00:00
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void MacroAssembler::CallRuntime(Runtime::FunctionId id, int num_arguments) {
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CallRuntime(Runtime::FunctionForId(id), num_arguments);
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}
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void MacroAssembler::CallRuntime(Runtime::Function* f, int num_arguments) {
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// If the expected number of arguments of the runtime function is
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// constant, we check that the actual number of arguments match the
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// expectation.
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if (f->nargs >= 0 && f->nargs != num_arguments) {
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IllegalOperation(num_arguments);
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return;
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}
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Runtime::FunctionId function_id =
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static_cast<Runtime::FunctionId>(f->stub_id);
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RuntimeStub stub(function_id, num_arguments);
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CallStub(&stub);
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}
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void MacroAssembler::TailCallRuntime(ExternalReference const& ext,
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int num_arguments) {
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// TODO(1236192): Most runtime routines don't need the number of
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// arguments passed in because it is constant. At some point we
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// should remove this need and make the runtime routine entry code
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// smarter.
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movq(rax, Immediate(num_arguments));
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JumpToBuiltin(ext);
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}
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void MacroAssembler::JumpToBuiltin(const ExternalReference& ext) {
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// Set the entry point and jump to the C entry runtime stub.
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movq(rbx, ext);
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CEntryStub ces;
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movq(kScratchRegister, ces.GetCode(), RelocInfo::CODE_TARGET);
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jmp(kScratchRegister);
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2009-05-20 13:20:02 +00:00
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}
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2009-06-03 10:30:50 +00:00
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2009-06-18 11:46:38 +00:00
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void MacroAssembler::GetBuiltinEntry(Register target, Builtins::JavaScript id) {
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bool resolved;
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Handle<Code> code = ResolveBuiltin(id, &resolved);
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const char* name = Builtins::GetName(id);
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int argc = Builtins::GetArgumentsCount(id);
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2009-07-08 16:19:13 +00:00
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movq(target, code, RelocInfo::EMBEDDED_OBJECT);
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2009-06-18 11:46:38 +00:00
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if (!resolved) {
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uint32_t flags =
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Bootstrapper::FixupFlagsArgumentsCount::encode(argc) |
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Bootstrapper::FixupFlagsIsPCRelative::encode(false) |
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Bootstrapper::FixupFlagsUseCodeObject::encode(true);
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Unresolved entry = { pc_offset() - sizeof(intptr_t), flags, name };
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unresolved_.Add(entry);
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}
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addq(target, Immediate(Code::kHeaderSize - kHeapObjectTag));
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}
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Handle<Code> MacroAssembler::ResolveBuiltin(Builtins::JavaScript id,
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bool* resolved) {
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// Move the builtin function into the temporary function slot by
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// reading it from the builtins object. NOTE: We should be able to
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// reduce this to two instructions by putting the function table in
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// the global object instead of the "builtins" object and by using a
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// real register for the function.
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movq(rdx, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX)));
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movq(rdx, FieldOperand(rdx, GlobalObject::kBuiltinsOffset));
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int builtins_offset =
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JSBuiltinsObject::kJSBuiltinsOffset + (id * kPointerSize);
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movq(rdi, FieldOperand(rdx, builtins_offset));
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return Builtins::GetCode(id, resolved);
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}
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2009-06-03 10:30:50 +00:00
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void MacroAssembler::Set(Register dst, int64_t x) {
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2009-07-07 12:40:15 +00:00
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if (x == 0) {
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xor_(dst, dst);
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} else if (is_int32(x)) {
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2009-06-03 10:30:50 +00:00
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movq(dst, Immediate(x));
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} else if (is_uint32(x)) {
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movl(dst, Immediate(x));
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} else {
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movq(dst, x, RelocInfo::NONE);
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}
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}
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void MacroAssembler::Set(const Operand& dst, int64_t x) {
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2009-07-07 12:40:15 +00:00
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if (x == 0) {
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xor_(kScratchRegister, kScratchRegister);
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movq(dst, kScratchRegister);
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} else if (is_int32(x)) {
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movq(dst, Immediate(x));
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2009-06-03 10:30:50 +00:00
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} else if (is_uint32(x)) {
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2009-07-07 12:40:15 +00:00
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movl(dst, Immediate(x));
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2009-06-03 10:30:50 +00:00
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} else {
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movq(kScratchRegister, x, RelocInfo::NONE);
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2009-07-07 12:40:15 +00:00
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movq(dst, kScratchRegister);
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2009-06-03 10:30:50 +00:00
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}
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}
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2009-06-22 14:22:39 +00:00
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bool MacroAssembler::IsUnsafeSmi(Smi* value) {
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return false;
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}
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void MacroAssembler::LoadUnsafeSmi(Register dst, Smi* source) {
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UNIMPLEMENTED();
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}
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void MacroAssembler::Move(Register dst, Handle<Object> source) {
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2009-07-07 12:40:15 +00:00
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ASSERT(!source->IsFailure());
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2009-06-22 14:22:39 +00:00
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if (source->IsSmi()) {
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if (IsUnsafeSmi(source)) {
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LoadUnsafeSmi(dst, source);
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} else {
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2009-07-07 12:40:15 +00:00
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int32_t smi = static_cast<int32_t>(reinterpret_cast<intptr_t>(*source));
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movq(dst, Immediate(smi));
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2009-06-22 14:22:39 +00:00
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}
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} else {
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movq(dst, source, RelocInfo::EMBEDDED_OBJECT);
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}
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}
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void MacroAssembler::Move(const Operand& dst, Handle<Object> source) {
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2009-07-07 12:40:15 +00:00
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if (source->IsSmi()) {
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int32_t smi = static_cast<int32_t>(reinterpret_cast<intptr_t>(*source));
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movq(dst, Immediate(smi));
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} else {
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movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT);
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movq(dst, kScratchRegister);
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}
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2009-06-22 14:22:39 +00:00
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}
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void MacroAssembler::Cmp(Register dst, Handle<Object> source) {
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Move(kScratchRegister, source);
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cmpq(dst, kScratchRegister);
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}
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2009-06-24 13:46:07 +00:00
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void MacroAssembler::Cmp(const Operand& dst, Handle<Object> source) {
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2009-07-07 12:40:15 +00:00
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if (source->IsSmi()) {
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if (IsUnsafeSmi(source)) {
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LoadUnsafeSmi(kScratchRegister, source);
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cmpl(dst, kScratchRegister);
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} else {
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// For smi-comparison, it suffices to compare the low 32 bits.
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int32_t smi = static_cast<int32_t>(reinterpret_cast<intptr_t>(*source));
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cmpl(dst, Immediate(smi));
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}
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} else {
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ASSERT(source->IsHeapObject());
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movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT);
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cmpq(dst, kScratchRegister);
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}
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2009-06-24 13:46:07 +00:00
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}
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2009-06-22 15:14:20 +00:00
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void MacroAssembler::Push(Handle<Object> source) {
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2009-07-07 12:40:15 +00:00
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if (source->IsSmi()) {
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if (IsUnsafeSmi(source)) {
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LoadUnsafeSmi(kScratchRegister, source);
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push(kScratchRegister);
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} else {
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int32_t smi = static_cast<int32_t>(reinterpret_cast<intptr_t>(*source));
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push(Immediate(smi));
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}
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} else {
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ASSERT(source->IsHeapObject());
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movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT);
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push(kScratchRegister);
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}
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2009-06-22 15:14:20 +00:00
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}
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2009-06-10 15:53:46 +00:00
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void MacroAssembler::Jump(ExternalReference ext) {
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movq(kScratchRegister, ext);
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jmp(kScratchRegister);
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}
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void MacroAssembler::Jump(Address destination, RelocInfo::Mode rmode) {
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movq(kScratchRegister, destination, rmode);
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jmp(kScratchRegister);
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}
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2009-06-18 11:46:38 +00:00
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void MacroAssembler::Jump(Handle<Code> code_object, RelocInfo::Mode rmode) {
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WriteRecordedPositions();
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ASSERT(RelocInfo::IsCodeTarget(rmode));
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movq(kScratchRegister, code_object, rmode);
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2009-06-23 11:26:05 +00:00
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#ifdef DEBUG
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Label target;
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bind(&target);
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#endif
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2009-06-18 11:46:38 +00:00
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jmp(kScratchRegister);
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2009-06-23 11:26:05 +00:00
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#ifdef DEBUG
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|
|
ASSERT_EQ(kTargetAddrToReturnAddrDist,
|
|
|
|
SizeOfCodeGeneratedSince(&target) + kPointerSize);
|
|
|
|
#endif
|
2009-06-18 11:46:38 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2009-06-10 15:53:46 +00:00
|
|
|
void MacroAssembler::Call(ExternalReference ext) {
|
|
|
|
movq(kScratchRegister, ext);
|
|
|
|
call(kScratchRegister);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void MacroAssembler::Call(Address destination, RelocInfo::Mode rmode) {
|
|
|
|
movq(kScratchRegister, destination, rmode);
|
|
|
|
call(kScratchRegister);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2009-06-18 11:46:38 +00:00
|
|
|
void MacroAssembler::Call(Handle<Code> code_object, RelocInfo::Mode rmode) {
|
|
|
|
WriteRecordedPositions();
|
|
|
|
ASSERT(RelocInfo::IsCodeTarget(rmode));
|
|
|
|
movq(kScratchRegister, code_object, rmode);
|
2009-06-22 14:46:33 +00:00
|
|
|
#ifdef DEBUG
|
|
|
|
Label target;
|
|
|
|
bind(&target);
|
|
|
|
#endif
|
2009-06-18 11:46:38 +00:00
|
|
|
call(kScratchRegister);
|
2009-06-22 14:46:33 +00:00
|
|
|
#ifdef DEBUG
|
|
|
|
ASSERT_EQ(kTargetAddrToReturnAddrDist,
|
|
|
|
SizeOfCodeGeneratedSince(&target) + kPointerSize);
|
|
|
|
#endif
|
2009-06-18 11:46:38 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2009-06-04 11:54:14 +00:00
|
|
|
void MacroAssembler::PushTryHandler(CodeLocation try_location,
|
|
|
|
HandlerType type) {
|
2009-06-10 09:00:07 +00:00
|
|
|
// Adjust this code if not the case.
|
|
|
|
ASSERT(StackHandlerConstants::kSize == 4 * kPointerSize);
|
|
|
|
|
|
|
|
// The pc (return address) is already on TOS. This code pushes state,
|
|
|
|
// frame pointer and current handler. Check that they are expected
|
|
|
|
// next on the stack, in that order.
|
2009-06-04 11:54:14 +00:00
|
|
|
ASSERT_EQ(StackHandlerConstants::kStateOffset,
|
|
|
|
StackHandlerConstants::kPCOffset - kPointerSize);
|
|
|
|
ASSERT_EQ(StackHandlerConstants::kFPOffset,
|
2009-06-10 09:00:07 +00:00
|
|
|
StackHandlerConstants::kStateOffset - kPointerSize);
|
|
|
|
ASSERT_EQ(StackHandlerConstants::kNextOffset,
|
2009-06-04 11:54:14 +00:00
|
|
|
StackHandlerConstants::kFPOffset - kPointerSize);
|
|
|
|
|
|
|
|
if (try_location == IN_JAVASCRIPT) {
|
|
|
|
if (type == TRY_CATCH_HANDLER) {
|
|
|
|
push(Immediate(StackHandler::TRY_CATCH));
|
|
|
|
} else {
|
|
|
|
push(Immediate(StackHandler::TRY_FINALLY));
|
|
|
|
}
|
|
|
|
push(rbp);
|
|
|
|
} else {
|
|
|
|
ASSERT(try_location == IN_JS_ENTRY);
|
2009-06-10 09:00:07 +00:00
|
|
|
// The frame pointer does not point to a JS frame so we save NULL
|
|
|
|
// for rbp. We expect the code throwing an exception to check rbp
|
|
|
|
// before dereferencing it to restore the context.
|
2009-06-04 11:54:14 +00:00
|
|
|
push(Immediate(StackHandler::ENTRY));
|
2009-06-10 09:00:07 +00:00
|
|
|
push(Immediate(0)); // NULL frame pointer.
|
2009-06-04 11:54:14 +00:00
|
|
|
}
|
2009-06-10 09:00:07 +00:00
|
|
|
// Save the current handler.
|
2009-06-04 11:54:14 +00:00
|
|
|
movq(kScratchRegister, ExternalReference(Top::k_handler_address));
|
2009-06-10 09:00:07 +00:00
|
|
|
push(Operand(kScratchRegister, 0));
|
2009-06-04 11:54:14 +00:00
|
|
|
// Link this handler.
|
|
|
|
movq(Operand(kScratchRegister, 0), rsp);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2009-06-10 15:53:46 +00:00
|
|
|
void MacroAssembler::Ret() {
|
|
|
|
ret(0);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2009-06-26 11:01:13 +00:00
|
|
|
void MacroAssembler::FCmp() {
|
|
|
|
fcompp();
|
|
|
|
push(rax);
|
|
|
|
fnstsw_ax();
|
|
|
|
// TODO(X64): Check that sahf is safe to use, using CPUProbe.
|
|
|
|
sahf();
|
|
|
|
pop(rax);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2009-06-11 13:51:46 +00:00
|
|
|
void MacroAssembler::CmpObjectType(Register heap_object,
|
|
|
|
InstanceType type,
|
|
|
|
Register map) {
|
|
|
|
movq(map, FieldOperand(heap_object, HeapObject::kMapOffset));
|
|
|
|
CmpInstanceType(map, type);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void MacroAssembler::CmpInstanceType(Register map, InstanceType type) {
|
|
|
|
cmpb(FieldOperand(map, Map::kInstanceTypeOffset),
|
|
|
|
Immediate(static_cast<int8_t>(type)));
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2009-07-02 07:09:49 +00:00
|
|
|
void MacroAssembler::TryGetFunctionPrototype(Register function,
|
|
|
|
Register result,
|
|
|
|
Label* miss) {
|
|
|
|
// Check that the receiver isn't a smi.
|
|
|
|
testl(function, Immediate(kSmiTagMask));
|
|
|
|
j(zero, miss);
|
|
|
|
|
|
|
|
// Check that the function really is a function.
|
|
|
|
CmpObjectType(function, JS_FUNCTION_TYPE, result);
|
|
|
|
j(not_equal, miss);
|
|
|
|
|
|
|
|
// Make sure that the function has an instance prototype.
|
|
|
|
Label non_instance;
|
|
|
|
testb(FieldOperand(result, Map::kBitFieldOffset),
|
|
|
|
Immediate(1 << Map::kHasNonInstancePrototype));
|
|
|
|
j(not_zero, &non_instance);
|
|
|
|
|
|
|
|
// Get the prototype or initial map from the function.
|
|
|
|
movq(result,
|
|
|
|
FieldOperand(function, JSFunction::kPrototypeOrInitialMapOffset));
|
|
|
|
|
|
|
|
// If the prototype or initial map is the hole, don't return it and
|
|
|
|
// simply miss the cache instead. This will allow us to allocate a
|
|
|
|
// prototype object on-demand in the runtime system.
|
|
|
|
Cmp(result, Factory::the_hole_value());
|
|
|
|
j(equal, miss);
|
|
|
|
|
|
|
|
// If the function does not have an initial map, we're done.
|
|
|
|
Label done;
|
|
|
|
CmpObjectType(result, MAP_TYPE, kScratchRegister);
|
|
|
|
j(not_equal, &done);
|
|
|
|
|
|
|
|
// Get the prototype from the initial map.
|
|
|
|
movq(result, FieldOperand(result, Map::kPrototypeOffset));
|
|
|
|
jmp(&done);
|
|
|
|
|
|
|
|
// Non-instance prototype: Fetch prototype from constructor field
|
|
|
|
// in initial map.
|
|
|
|
bind(&non_instance);
|
|
|
|
movq(result, FieldOperand(result, Map::kConstructorOffset));
|
|
|
|
|
|
|
|
// All done.
|
|
|
|
bind(&done);
|
|
|
|
}
|
|
|
|
|
2009-06-11 13:51:46 +00:00
|
|
|
|
2009-06-10 15:53:46 +00:00
|
|
|
void MacroAssembler::SetCounter(StatsCounter* counter, int value) {
|
|
|
|
if (FLAG_native_code_counters && counter->Enabled()) {
|
|
|
|
movq(kScratchRegister, ExternalReference(counter));
|
|
|
|
movl(Operand(kScratchRegister, 0), Immediate(value));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void MacroAssembler::IncrementCounter(StatsCounter* counter, int value) {
|
|
|
|
ASSERT(value > 0);
|
|
|
|
if (FLAG_native_code_counters && counter->Enabled()) {
|
|
|
|
movq(kScratchRegister, ExternalReference(counter));
|
|
|
|
Operand operand(kScratchRegister, 0);
|
|
|
|
if (value == 1) {
|
|
|
|
incl(operand);
|
|
|
|
} else {
|
|
|
|
addl(operand, Immediate(value));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void MacroAssembler::DecrementCounter(StatsCounter* counter, int value) {
|
|
|
|
ASSERT(value > 0);
|
|
|
|
if (FLAG_native_code_counters && counter->Enabled()) {
|
|
|
|
movq(kScratchRegister, ExternalReference(counter));
|
|
|
|
Operand operand(kScratchRegister, 0);
|
|
|
|
if (value == 1) {
|
|
|
|
decl(operand);
|
|
|
|
} else {
|
|
|
|
subl(operand, Immediate(value));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2009-06-10 09:48:15 +00:00
|
|
|
#ifdef ENABLE_DEBUGGER_SUPPORT
|
|
|
|
|
|
|
|
void MacroAssembler::PushRegistersFromMemory(RegList regs) {
|
|
|
|
ASSERT((regs & ~kJSCallerSaved) == 0);
|
|
|
|
// Push the content of the memory location to the stack.
|
|
|
|
for (int i = 0; i < kNumJSCallerSaved; i++) {
|
|
|
|
int r = JSCallerSavedCode(i);
|
|
|
|
if ((regs & (1 << r)) != 0) {
|
|
|
|
ExternalReference reg_addr =
|
|
|
|
ExternalReference(Debug_Address::Register(i));
|
|
|
|
movq(kScratchRegister, reg_addr);
|
|
|
|
push(Operand(kScratchRegister, 0));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void MacroAssembler::SaveRegistersToMemory(RegList regs) {
|
|
|
|
ASSERT((regs & ~kJSCallerSaved) == 0);
|
|
|
|
// Copy the content of registers to memory location.
|
|
|
|
for (int i = 0; i < kNumJSCallerSaved; i++) {
|
|
|
|
int r = JSCallerSavedCode(i);
|
|
|
|
if ((regs & (1 << r)) != 0) {
|
|
|
|
Register reg = { r };
|
|
|
|
ExternalReference reg_addr =
|
|
|
|
ExternalReference(Debug_Address::Register(i));
|
|
|
|
movq(kScratchRegister, reg_addr);
|
|
|
|
movq(Operand(kScratchRegister, 0), reg);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void MacroAssembler::RestoreRegistersFromMemory(RegList regs) {
|
|
|
|
ASSERT((regs & ~kJSCallerSaved) == 0);
|
|
|
|
// Copy the content of memory location to registers.
|
|
|
|
for (int i = kNumJSCallerSaved - 1; i >= 0; i--) {
|
|
|
|
int r = JSCallerSavedCode(i);
|
|
|
|
if ((regs & (1 << r)) != 0) {
|
|
|
|
Register reg = { r };
|
|
|
|
ExternalReference reg_addr =
|
|
|
|
ExternalReference(Debug_Address::Register(i));
|
|
|
|
movq(kScratchRegister, reg_addr);
|
|
|
|
movq(reg, Operand(kScratchRegister, 0));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void MacroAssembler::PopRegistersToMemory(RegList regs) {
|
|
|
|
ASSERT((regs & ~kJSCallerSaved) == 0);
|
|
|
|
// Pop the content from the stack to the memory location.
|
|
|
|
for (int i = kNumJSCallerSaved - 1; i >= 0; i--) {
|
|
|
|
int r = JSCallerSavedCode(i);
|
|
|
|
if ((regs & (1 << r)) != 0) {
|
|
|
|
ExternalReference reg_addr =
|
|
|
|
ExternalReference(Debug_Address::Register(i));
|
|
|
|
movq(kScratchRegister, reg_addr);
|
|
|
|
pop(Operand(kScratchRegister, 0));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void MacroAssembler::CopyRegistersFromStackToMemory(Register base,
|
|
|
|
Register scratch,
|
|
|
|
RegList regs) {
|
|
|
|
ASSERT(!scratch.is(kScratchRegister));
|
|
|
|
ASSERT(!base.is(kScratchRegister));
|
|
|
|
ASSERT(!base.is(scratch));
|
|
|
|
ASSERT((regs & ~kJSCallerSaved) == 0);
|
|
|
|
// Copy the content of the stack to the memory location and adjust base.
|
|
|
|
for (int i = kNumJSCallerSaved - 1; i >= 0; i--) {
|
|
|
|
int r = JSCallerSavedCode(i);
|
|
|
|
if ((regs & (1 << r)) != 0) {
|
|
|
|
movq(scratch, Operand(base, 0));
|
|
|
|
ExternalReference reg_addr =
|
|
|
|
ExternalReference(Debug_Address::Register(i));
|
|
|
|
movq(kScratchRegister, reg_addr);
|
|
|
|
movq(Operand(kScratchRegister, 0), scratch);
|
|
|
|
lea(base, Operand(base, kPointerSize));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif // ENABLE_DEBUGGER_SUPPORT
|
|
|
|
|
|
|
|
|
2009-06-23 11:26:05 +00:00
|
|
|
void MacroAssembler::InvokeBuiltin(Builtins::JavaScript id, InvokeFlag flag) {
|
|
|
|
bool resolved;
|
|
|
|
Handle<Code> code = ResolveBuiltin(id, &resolved);
|
|
|
|
|
|
|
|
// Calls are not allowed in some stubs.
|
|
|
|
ASSERT(flag == JUMP_FUNCTION || allow_stub_calls());
|
|
|
|
|
|
|
|
// Rely on the assertion to check that the number of provided
|
|
|
|
// arguments match the expected number of arguments. Fake a
|
|
|
|
// parameter count to avoid emitting code to do the check.
|
|
|
|
ParameterCount expected(0);
|
|
|
|
InvokeCode(Handle<Code>(code), expected, expected,
|
|
|
|
RelocInfo::CODE_TARGET, flag);
|
|
|
|
|
|
|
|
const char* name = Builtins::GetName(id);
|
|
|
|
int argc = Builtins::GetArgumentsCount(id);
|
|
|
|
// The target address for the jump is stored as an immediate at offset
|
|
|
|
// kInvokeCodeAddressOffset.
|
|
|
|
if (!resolved) {
|
|
|
|
uint32_t flags =
|
|
|
|
Bootstrapper::FixupFlagsArgumentsCount::encode(argc) |
|
2009-07-08 16:19:13 +00:00
|
|
|
Bootstrapper::FixupFlagsIsPCRelative::encode(false) |
|
2009-06-23 11:26:05 +00:00
|
|
|
Bootstrapper::FixupFlagsUseCodeObject::encode(false);
|
|
|
|
Unresolved entry =
|
|
|
|
{ pc_offset() - kTargetAddrToReturnAddrDist, flags, name };
|
|
|
|
unresolved_.Add(entry);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2009-06-11 10:46:28 +00:00
|
|
|
void MacroAssembler::InvokePrologue(const ParameterCount& expected,
|
|
|
|
const ParameterCount& actual,
|
|
|
|
Handle<Code> code_constant,
|
|
|
|
Register code_register,
|
|
|
|
Label* done,
|
|
|
|
InvokeFlag flag) {
|
|
|
|
bool definitely_matches = false;
|
|
|
|
Label invoke;
|
|
|
|
if (expected.is_immediate()) {
|
|
|
|
ASSERT(actual.is_immediate());
|
|
|
|
if (expected.immediate() == actual.immediate()) {
|
|
|
|
definitely_matches = true;
|
|
|
|
} else {
|
|
|
|
movq(rax, Immediate(actual.immediate()));
|
|
|
|
if (expected.immediate() ==
|
|
|
|
SharedFunctionInfo::kDontAdaptArgumentsSentinel) {
|
|
|
|
// Don't worry about adapting arguments for built-ins that
|
|
|
|
// don't want that done. Skip adaption code by making it look
|
|
|
|
// like we have a match between expected and actual number of
|
|
|
|
// arguments.
|
|
|
|
definitely_matches = true;
|
|
|
|
} else {
|
|
|
|
movq(rbx, Immediate(expected.immediate()));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
if (actual.is_immediate()) {
|
|
|
|
// Expected is in register, actual is immediate. This is the
|
|
|
|
// case when we invoke function values without going through the
|
|
|
|
// IC mechanism.
|
|
|
|
cmpq(expected.reg(), Immediate(actual.immediate()));
|
|
|
|
j(equal, &invoke);
|
|
|
|
ASSERT(expected.reg().is(rbx));
|
|
|
|
movq(rax, Immediate(actual.immediate()));
|
|
|
|
} else if (!expected.reg().is(actual.reg())) {
|
|
|
|
// Both expected and actual are in (different) registers. This
|
|
|
|
// is the case when we invoke functions using call and apply.
|
|
|
|
cmpq(expected.reg(), actual.reg());
|
|
|
|
j(equal, &invoke);
|
|
|
|
ASSERT(actual.reg().is(rax));
|
|
|
|
ASSERT(expected.reg().is(rbx));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!definitely_matches) {
|
|
|
|
Handle<Code> adaptor =
|
|
|
|
Handle<Code>(Builtins::builtin(Builtins::ArgumentsAdaptorTrampoline));
|
|
|
|
if (!code_constant.is_null()) {
|
|
|
|
movq(rdx, code_constant, RelocInfo::EMBEDDED_OBJECT);
|
|
|
|
addq(rdx, Immediate(Code::kHeaderSize - kHeapObjectTag));
|
|
|
|
} else if (!code_register.is(rdx)) {
|
|
|
|
movq(rdx, code_register);
|
|
|
|
}
|
|
|
|
|
|
|
|
movq(kScratchRegister, adaptor, RelocInfo::CODE_TARGET);
|
|
|
|
if (flag == CALL_FUNCTION) {
|
|
|
|
call(kScratchRegister);
|
|
|
|
jmp(done);
|
|
|
|
} else {
|
|
|
|
jmp(kScratchRegister);
|
|
|
|
}
|
|
|
|
bind(&invoke);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void MacroAssembler::InvokeCode(Register code,
|
|
|
|
const ParameterCount& expected,
|
|
|
|
const ParameterCount& actual,
|
|
|
|
InvokeFlag flag) {
|
|
|
|
Label done;
|
|
|
|
InvokePrologue(expected, actual, Handle<Code>::null(), code, &done, flag);
|
|
|
|
if (flag == CALL_FUNCTION) {
|
|
|
|
call(code);
|
|
|
|
} else {
|
|
|
|
ASSERT(flag == JUMP_FUNCTION);
|
|
|
|
jmp(code);
|
|
|
|
}
|
|
|
|
bind(&done);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void MacroAssembler::InvokeCode(Handle<Code> code,
|
|
|
|
const ParameterCount& expected,
|
|
|
|
const ParameterCount& actual,
|
|
|
|
RelocInfo::Mode rmode,
|
|
|
|
InvokeFlag flag) {
|
|
|
|
Label done;
|
|
|
|
Register dummy = rax;
|
|
|
|
InvokePrologue(expected, actual, code, dummy, &done, flag);
|
|
|
|
if (flag == CALL_FUNCTION) {
|
2009-06-23 11:26:05 +00:00
|
|
|
Call(code, rmode);
|
2009-06-11 10:46:28 +00:00
|
|
|
} else {
|
|
|
|
ASSERT(flag == JUMP_FUNCTION);
|
2009-06-23 11:26:05 +00:00
|
|
|
Jump(code, rmode);
|
2009-06-11 10:46:28 +00:00
|
|
|
}
|
|
|
|
bind(&done);
|
|
|
|
}
|
2009-06-10 09:48:15 +00:00
|
|
|
|
|
|
|
|
2009-06-11 10:46:28 +00:00
|
|
|
void MacroAssembler::InvokeFunction(Register function,
|
2009-06-10 09:48:15 +00:00
|
|
|
const ParameterCount& actual,
|
|
|
|
InvokeFlag flag) {
|
2009-06-11 10:46:28 +00:00
|
|
|
ASSERT(function.is(rdi));
|
|
|
|
movq(rdx, FieldOperand(function, JSFunction::kSharedFunctionInfoOffset));
|
|
|
|
movq(rsi, FieldOperand(function, JSFunction::kContextOffset));
|
2009-06-24 13:48:09 +00:00
|
|
|
movsxlq(rbx,
|
|
|
|
FieldOperand(rdx, SharedFunctionInfo::kFormalParameterCountOffset));
|
2009-06-11 10:46:28 +00:00
|
|
|
movq(rdx, FieldOperand(rdx, SharedFunctionInfo::kCodeOffset));
|
2009-06-17 12:16:59 +00:00
|
|
|
// Advances rdx to the end of the Code object header, to the start of
|
2009-06-16 08:24:42 +00:00
|
|
|
// the executable code.
|
2009-06-11 10:46:28 +00:00
|
|
|
lea(rdx, FieldOperand(rdx, Code::kHeaderSize));
|
|
|
|
|
|
|
|
ParameterCount expected(rbx);
|
|
|
|
InvokeCode(rdx, expected, actual, flag);
|
2009-06-10 09:48:15 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void MacroAssembler::EnterFrame(StackFrame::Type type) {
|
|
|
|
push(rbp);
|
|
|
|
movq(rbp, rsp);
|
|
|
|
push(rsi); // Context.
|
|
|
|
push(Immediate(Smi::FromInt(type)));
|
|
|
|
movq(kScratchRegister, CodeObject(), RelocInfo::EMBEDDED_OBJECT);
|
|
|
|
push(kScratchRegister);
|
|
|
|
if (FLAG_debug_code) {
|
|
|
|
movq(kScratchRegister,
|
|
|
|
Factory::undefined_value(),
|
|
|
|
RelocInfo::EMBEDDED_OBJECT);
|
2009-06-10 15:53:46 +00:00
|
|
|
cmpq(Operand(rsp, 0), kScratchRegister);
|
2009-06-10 09:48:15 +00:00
|
|
|
Check(not_equal, "code object not properly patched");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void MacroAssembler::LeaveFrame(StackFrame::Type type) {
|
|
|
|
if (FLAG_debug_code) {
|
|
|
|
movq(kScratchRegister, Immediate(Smi::FromInt(type)));
|
2009-06-10 15:53:46 +00:00
|
|
|
cmpq(Operand(rbp, StandardFrameConstants::kMarkerOffset), kScratchRegister);
|
2009-06-10 09:48:15 +00:00
|
|
|
Check(equal, "stack frame types must match");
|
|
|
|
}
|
|
|
|
movq(rsp, rbp);
|
|
|
|
pop(rbp);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
void MacroAssembler::EnterExitFrame(StackFrame::Type type) {
|
|
|
|
ASSERT(type == StackFrame::EXIT || type == StackFrame::EXIT_DEBUG);
|
|
|
|
|
|
|
|
// Setup the frame structure on the stack.
|
2009-07-03 10:13:05 +00:00
|
|
|
// All constants are relative to the frame pointer of the exit frame.
|
2009-06-10 15:08:25 +00:00
|
|
|
ASSERT(ExitFrameConstants::kCallerSPDisplacement == +2 * kPointerSize);
|
2009-06-10 09:48:15 +00:00
|
|
|
ASSERT(ExitFrameConstants::kCallerPCOffset == +1 * kPointerSize);
|
|
|
|
ASSERT(ExitFrameConstants::kCallerFPOffset == 0 * kPointerSize);
|
|
|
|
push(rbp);
|
|
|
|
movq(rbp, rsp);
|
|
|
|
|
|
|
|
// Reserve room for entry stack pointer and push the debug marker.
|
|
|
|
ASSERT(ExitFrameConstants::kSPOffset == -1 * kPointerSize);
|
|
|
|
push(Immediate(0)); // saved entry sp, patched before call
|
|
|
|
push(Immediate(type == StackFrame::EXIT_DEBUG ? 1 : 0));
|
|
|
|
|
|
|
|
// Save the frame pointer and the context in top.
|
|
|
|
ExternalReference c_entry_fp_address(Top::k_c_entry_fp_address);
|
|
|
|
ExternalReference context_address(Top::k_context_address);
|
2009-07-03 10:13:05 +00:00
|
|
|
movq(r14, rax); // Backup rax before we use it.
|
2009-06-12 13:14:35 +00:00
|
|
|
|
2009-06-10 09:48:15 +00:00
|
|
|
movq(rax, rbp);
|
|
|
|
store_rax(c_entry_fp_address);
|
|
|
|
movq(rax, rsi);
|
|
|
|
store_rax(context_address);
|
|
|
|
|
2009-06-12 13:14:35 +00:00
|
|
|
// Setup argv in callee-saved register r15. It is reused in LeaveExitFrame,
|
|
|
|
// so it must be retained across the C-call.
|
2009-06-10 09:48:15 +00:00
|
|
|
int offset = StandardFrameConstants::kCallerSPOffset - kPointerSize;
|
2009-07-03 10:13:05 +00:00
|
|
|
lea(r15, Operand(rbp, r14, times_pointer_size, offset));
|
2009-06-10 09:48:15 +00:00
|
|
|
|
|
|
|
#ifdef ENABLE_DEBUGGER_SUPPORT
|
|
|
|
// Save the state of all registers to the stack from the memory
|
|
|
|
// location. This is needed to allow nested break points.
|
|
|
|
if (type == StackFrame::EXIT_DEBUG) {
|
|
|
|
// TODO(1243899): This should be symmetric to
|
|
|
|
// CopyRegistersFromStackToMemory() but it isn't! esp is assumed
|
|
|
|
// correct here, but computed for the other call. Very error
|
|
|
|
// prone! FIX THIS. Actually there are deeper problems with
|
|
|
|
// register saving than this asymmetry (see the bug report
|
|
|
|
// associated with this issue).
|
|
|
|
PushRegistersFromMemory(kJSCallerSaved);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2009-06-12 13:14:35 +00:00
|
|
|
// Reserve space for two arguments: argc and argv
|
2009-06-10 15:53:46 +00:00
|
|
|
subq(rsp, Immediate(2 * kPointerSize));
|
2009-06-10 09:48:15 +00:00
|
|
|
|
|
|
|
// Get the required frame alignment for the OS.
|
|
|
|
static const int kFrameAlignment = OS::ActivationFrameAlignment();
|
|
|
|
if (kFrameAlignment > 0) {
|
|
|
|
ASSERT(IsPowerOf2(kFrameAlignment));
|
2009-06-12 13:14:35 +00:00
|
|
|
movq(kScratchRegister, Immediate(-kFrameAlignment));
|
|
|
|
and_(rsp, kScratchRegister);
|
2009-06-10 09:48:15 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
// Patch the saved entry sp.
|
|
|
|
movq(Operand(rbp, ExitFrameConstants::kSPOffset), rsp);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void MacroAssembler::LeaveExitFrame(StackFrame::Type type) {
|
2009-06-12 13:14:35 +00:00
|
|
|
// Registers:
|
|
|
|
// r15 : argv
|
2009-06-10 09:48:15 +00:00
|
|
|
#ifdef ENABLE_DEBUGGER_SUPPORT
|
|
|
|
// Restore the memory copy of the registers by digging them out from
|
|
|
|
// the stack. This is needed to allow nested break points.
|
|
|
|
if (type == StackFrame::EXIT_DEBUG) {
|
|
|
|
// It's okay to clobber register ebx below because we don't need
|
|
|
|
// the function pointer after this.
|
|
|
|
const int kCallerSavedSize = kNumJSCallerSaved * kPointerSize;
|
|
|
|
int kOffset = ExitFrameConstants::kDebugMarkOffset - kCallerSavedSize;
|
|
|
|
lea(rbx, Operand(rbp, kOffset));
|
|
|
|
CopyRegistersFromStackToMemory(rbx, rcx, kJSCallerSaved);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
// Get the return address from the stack and restore the frame pointer.
|
|
|
|
movq(rcx, Operand(rbp, 1 * kPointerSize));
|
|
|
|
movq(rbp, Operand(rbp, 0 * kPointerSize));
|
|
|
|
|
|
|
|
// Pop the arguments and the receiver from the caller stack.
|
2009-06-12 13:14:35 +00:00
|
|
|
lea(rsp, Operand(r15, 1 * kPointerSize));
|
2009-06-10 09:48:15 +00:00
|
|
|
|
|
|
|
// Restore current context from top and clear it in debug mode.
|
|
|
|
ExternalReference context_address(Top::k_context_address);
|
|
|
|
movq(kScratchRegister, context_address);
|
|
|
|
movq(rsi, Operand(kScratchRegister, 0));
|
|
|
|
#ifdef DEBUG
|
|
|
|
movq(Operand(kScratchRegister, 0), Immediate(0));
|
|
|
|
#endif
|
|
|
|
|
|
|
|
// Push the return address to get ready to return.
|
|
|
|
push(rcx);
|
|
|
|
|
|
|
|
// Clear the top frame.
|
|
|
|
ExternalReference c_entry_fp_address(Top::k_c_entry_fp_address);
|
|
|
|
movq(kScratchRegister, c_entry_fp_address);
|
|
|
|
movq(Operand(kScratchRegister, 0), Immediate(0));
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2009-05-20 13:20:02 +00:00
|
|
|
} } // namespace v8::internal
|