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// Copyright 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.
#include "v8.h"
#include "bootstrapper.h"
#include "codegen-inl.h"
#include "macro-assembler-x64.h"
namespace v8 {
namespace internal {
MacroAssembler::MacroAssembler(void* buffer, int size)
: Assembler(buffer, size),
unresolved_(0),
generating_stub_(false),
allow_stub_calls_(true),
code_object_(Heap::undefined_value()) {
}
void MacroAssembler::TailCallRuntime(ExternalReference const& a, int b) {
UNIMPLEMENTED();
}
void MacroAssembler::Set(Register dst, int64_t x) {
if (is_int32(x)) {
movq(dst, Immediate(x));
} else if (is_uint32(x)) {
movl(dst, Immediate(x));
} else {
movq(dst, x, RelocInfo::NONE);
}
}
void MacroAssembler::Set(const Operand& dst, int64_t x) {
if (is_int32(x)) {
movq(kScratchRegister, Immediate(x));
} else if (is_uint32(x)) {
movl(kScratchRegister, Immediate(x));
} else {
movq(kScratchRegister, x, RelocInfo::NONE);
}
movq(dst, kScratchRegister);
}
void MacroAssembler::PushTryHandler(CodeLocation try_location,
HandlerType type) {
// The pc (return address) is already on TOS.
// This code pushes state, code, frame pointer and parameter pointer.
// Check that they are expected next on the stack, int that order.
ASSERT_EQ(StackHandlerConstants::kStateOffset,
StackHandlerConstants::kPCOffset - kPointerSize);
ASSERT_EQ(StackHandlerConstants::kCodeOffset,
StackHandlerConstants::kStateOffset - kPointerSize);
ASSERT_EQ(StackHandlerConstants::kFPOffset,
StackHandlerConstants::kCodeOffset - kPointerSize);
ASSERT_EQ(StackHandlerConstants::kPPOffset,
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(Immediate(Smi::FromInt(StackHandler::kCodeNotPresent)));
push(rbp);
push(rdi);
} else {
ASSERT(try_location == IN_JS_ENTRY);
// The parameter pointer is meaningless here and ebp does not
// point to a JS frame. So we save NULL for both pp and ebp. We
// expect the code throwing an exception to check ebp before
// dereferencing it to restore the context.
push(Immediate(StackHandler::ENTRY));
push(Immediate(Smi::FromInt(StackHandler::kCodeNotPresent)));
push(Immediate(0)); // NULL frame pointer
push(Immediate(0)); // NULL parameter pointer
}
movq(kScratchRegister, ExternalReference(Top::k_handler_address));
// Cached TOS.
movq(rax, Operand(kScratchRegister, 0));
// Link this handler.
movq(Operand(kScratchRegister, 0), rsp);
}
} } // namespace v8::internal
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