2 // Copyright (c) 1994-2006 Sun Microsystems Inc.
3 // All Rights Reserved.
5 // Redistribution and use in source and binary forms, with or without
6 // modification, are permitted provided that the following conditions are
9 // - Redistributions of source code must retain the above copyright notice,
10 // this list of conditions and the following disclaimer.
12 // - Redistribution in binary form must reproduce the above copyright
13 // notice, this list of conditions and the following disclaimer in the
14 // documentation and/or other materials provided with the distribution.
16 // - Neither the name of Sun Microsystems or the names of contributors may
17 // be used to endorse or promote products derived from this software without
18 // specific prior written permission.
20 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
21 // IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 // THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
24 // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 // The original source code covered by the above license above has been
33 // modified significantly by Google Inc.
34 // Copyright 2012 the V8 project authors. All rights reserved.
37 #ifndef V8_MIPS_ASSEMBLER_MIPS_INL_H_
38 #define V8_MIPS_ASSEMBLER_MIPS_INL_H_
40 #include "src/mips/assembler-mips.h"
43 #include "src/debug.h"
50 bool CpuFeatures::SupportsCrankshaft() { return IsSupported(FPU); }
53 // -----------------------------------------------------------------------------
54 // Operand and MemOperand.
56 Operand::Operand(int32_t immediate, RelocInfo::Mode rmode) {
63 Operand::Operand(const ExternalReference& f) {
65 imm32_ = reinterpret_cast<int32_t>(f.address());
66 rmode_ = RelocInfo::EXTERNAL_REFERENCE;
70 Operand::Operand(Smi* value) {
72 imm32_ = reinterpret_cast<intptr_t>(value);
73 rmode_ = RelocInfo::NONE32;
77 Operand::Operand(Register rm) {
82 bool Operand::is_reg() const {
83 return rm_.is_valid();
87 int Register::NumAllocatableRegisters() {
88 return kMaxNumAllocatableRegisters;
92 int DoubleRegister::NumRegisters() {
93 return FPURegister::kMaxNumRegisters;
97 int DoubleRegister::NumAllocatableRegisters() {
98 return FPURegister::kMaxNumAllocatableRegisters;
102 int FPURegister::ToAllocationIndex(FPURegister reg) {
103 ASSERT(reg.code() % 2 == 0);
104 ASSERT(reg.code() / 2 < kMaxNumAllocatableRegisters);
105 ASSERT(reg.is_valid());
106 ASSERT(!reg.is(kDoubleRegZero));
107 ASSERT(!reg.is(kLithiumScratchDouble));
108 return (reg.code() / 2);
112 // -----------------------------------------------------------------------------
115 void RelocInfo::apply(intptr_t delta, ICacheFlushMode icache_flush_mode) {
116 if (IsCodeTarget(rmode_)) {
117 uint32_t scope1 = (uint32_t) target_address() & ~kImm28Mask;
118 uint32_t scope2 = reinterpret_cast<uint32_t>(pc_) & ~kImm28Mask;
120 if (scope1 != scope2) {
121 Assembler::JumpLabelToJumpRegister(pc_);
124 if (IsInternalReference(rmode_)) {
125 // Absolute code pointer inside code object moves with the code object.
126 byte* p = reinterpret_cast<byte*>(pc_);
127 int count = Assembler::RelocateInternalReference(p, delta);
128 CPU::FlushICache(p, count * sizeof(uint32_t));
133 Address RelocInfo::target_address() {
134 ASSERT(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_));
135 return Assembler::target_address_at(pc_, host_);
139 Address RelocInfo::target_address_address() {
140 ASSERT(IsCodeTarget(rmode_) ||
141 IsRuntimeEntry(rmode_) ||
142 rmode_ == EMBEDDED_OBJECT ||
143 rmode_ == EXTERNAL_REFERENCE);
144 // Read the address of the word containing the target_address in an
145 // instruction stream.
146 // The only architecture-independent user of this function is the serializer.
147 // The serializer uses it to find out how many raw bytes of instruction to
148 // output before the next target.
149 // For an instruction like LUI/ORI where the target bits are mixed into the
150 // instruction bits, the size of the target will be zero, indicating that the
151 // serializer should not step forward in memory after a target is resolved
152 // and written. In this case the target_address_address function should
153 // return the end of the instructions to be patched, allowing the
154 // deserializer to deserialize the instructions as raw bytes and put them in
155 // place, ready to be patched with the target. After jump optimization,
156 // that is the address of the instruction that follows J/JAL/JR/JALR
158 return reinterpret_cast<Address>(
159 pc_ + Assembler::kInstructionsFor32BitConstant * Assembler::kInstrSize);
163 Address RelocInfo::constant_pool_entry_address() {
169 int RelocInfo::target_address_size() {
170 return Assembler::kSpecialTargetSize;
174 void RelocInfo::set_target_address(Address target,
175 WriteBarrierMode write_barrier_mode,
176 ICacheFlushMode icache_flush_mode) {
177 ASSERT(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_));
178 Assembler::set_target_address_at(pc_, host_, target, icache_flush_mode);
179 if (write_barrier_mode == UPDATE_WRITE_BARRIER &&
180 host() != NULL && IsCodeTarget(rmode_)) {
181 Object* target_code = Code::GetCodeFromTargetAddress(target);
182 host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(
183 host(), this, HeapObject::cast(target_code));
188 Address Assembler::target_address_from_return_address(Address pc) {
189 return pc - kCallTargetAddressOffset;
193 Object* RelocInfo::target_object() {
194 ASSERT(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT);
195 return reinterpret_cast<Object*>(Assembler::target_address_at(pc_, host_));
199 Handle<Object> RelocInfo::target_object_handle(Assembler* origin) {
200 ASSERT(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT);
201 return Handle<Object>(reinterpret_cast<Object**>(
202 Assembler::target_address_at(pc_, host_)));
206 void RelocInfo::set_target_object(Object* target,
207 WriteBarrierMode write_barrier_mode,
208 ICacheFlushMode icache_flush_mode) {
209 ASSERT(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT);
210 ASSERT(!target->IsConsString());
211 Assembler::set_target_address_at(pc_, host_,
212 reinterpret_cast<Address>(target),
214 if (write_barrier_mode == UPDATE_WRITE_BARRIER &&
216 target->IsHeapObject()) {
217 host()->GetHeap()->incremental_marking()->RecordWrite(
218 host(), &Memory::Object_at(pc_), HeapObject::cast(target));
223 Address RelocInfo::target_reference() {
224 ASSERT(rmode_ == EXTERNAL_REFERENCE);
225 return Assembler::target_address_at(pc_, host_);
229 Address RelocInfo::target_runtime_entry(Assembler* origin) {
230 ASSERT(IsRuntimeEntry(rmode_));
231 return target_address();
235 void RelocInfo::set_target_runtime_entry(Address target,
236 WriteBarrierMode write_barrier_mode,
237 ICacheFlushMode icache_flush_mode) {
238 ASSERT(IsRuntimeEntry(rmode_));
239 if (target_address() != target)
240 set_target_address(target, write_barrier_mode, icache_flush_mode);
244 Handle<Cell> RelocInfo::target_cell_handle() {
245 ASSERT(rmode_ == RelocInfo::CELL);
246 Address address = Memory::Address_at(pc_);
247 return Handle<Cell>(reinterpret_cast<Cell**>(address));
251 Cell* RelocInfo::target_cell() {
252 ASSERT(rmode_ == RelocInfo::CELL);
253 return Cell::FromValueAddress(Memory::Address_at(pc_));
257 void RelocInfo::set_target_cell(Cell* cell,
258 WriteBarrierMode write_barrier_mode,
259 ICacheFlushMode icache_flush_mode) {
260 ASSERT(rmode_ == RelocInfo::CELL);
261 Address address = cell->address() + Cell::kValueOffset;
262 Memory::Address_at(pc_) = address;
263 if (write_barrier_mode == UPDATE_WRITE_BARRIER && host() != NULL) {
264 // TODO(1550) We are passing NULL as a slot because cell can never be on
265 // evacuation candidate.
266 host()->GetHeap()->incremental_marking()->RecordWrite(
272 static const int kNoCodeAgeSequenceLength = 7 * Assembler::kInstrSize;
275 Handle<Object> RelocInfo::code_age_stub_handle(Assembler* origin) {
276 UNREACHABLE(); // This should never be reached on Arm.
277 return Handle<Object>();
281 Code* RelocInfo::code_age_stub() {
282 ASSERT(rmode_ == RelocInfo::CODE_AGE_SEQUENCE);
283 return Code::GetCodeFromTargetAddress(
284 Assembler::target_address_at(pc_ + Assembler::kInstrSize, host_));
288 void RelocInfo::set_code_age_stub(Code* stub,
289 ICacheFlushMode icache_flush_mode) {
290 ASSERT(rmode_ == RelocInfo::CODE_AGE_SEQUENCE);
291 Assembler::set_target_address_at(pc_ + Assembler::kInstrSize,
293 stub->instruction_start());
297 Address RelocInfo::call_address() {
298 ASSERT((IsJSReturn(rmode()) && IsPatchedReturnSequence()) ||
299 (IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence()));
300 // The pc_ offset of 0 assumes mips patched return sequence per
301 // debug-mips.cc BreakLocationIterator::SetDebugBreakAtReturn(), or
302 // debug break slot per BreakLocationIterator::SetDebugBreakAtSlot().
303 return Assembler::target_address_at(pc_, host_);
307 void RelocInfo::set_call_address(Address target) {
308 ASSERT((IsJSReturn(rmode()) && IsPatchedReturnSequence()) ||
309 (IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence()));
310 // The pc_ offset of 0 assumes mips patched return sequence per
311 // debug-mips.cc BreakLocationIterator::SetDebugBreakAtReturn(), or
312 // debug break slot per BreakLocationIterator::SetDebugBreakAtSlot().
313 Assembler::set_target_address_at(pc_, host_, target);
314 if (host() != NULL) {
315 Object* target_code = Code::GetCodeFromTargetAddress(target);
316 host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(
317 host(), this, HeapObject::cast(target_code));
322 Object* RelocInfo::call_object() {
323 return *call_object_address();
327 Object** RelocInfo::call_object_address() {
328 ASSERT((IsJSReturn(rmode()) && IsPatchedReturnSequence()) ||
329 (IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence()));
330 return reinterpret_cast<Object**>(pc_ + 2 * Assembler::kInstrSize);
334 void RelocInfo::set_call_object(Object* target) {
335 *call_object_address() = target;
339 void RelocInfo::WipeOut() {
340 ASSERT(IsEmbeddedObject(rmode_) ||
341 IsCodeTarget(rmode_) ||
342 IsRuntimeEntry(rmode_) ||
343 IsExternalReference(rmode_));
344 Assembler::set_target_address_at(pc_, host_, NULL);
348 bool RelocInfo::IsPatchedReturnSequence() {
349 Instr instr0 = Assembler::instr_at(pc_);
350 Instr instr1 = Assembler::instr_at(pc_ + 1 * Assembler::kInstrSize);
351 Instr instr2 = Assembler::instr_at(pc_ + 2 * Assembler::kInstrSize);
352 bool patched_return = ((instr0 & kOpcodeMask) == LUI &&
353 (instr1 & kOpcodeMask) == ORI &&
354 ((instr2 & kOpcodeMask) == JAL ||
355 ((instr2 & kOpcodeMask) == SPECIAL &&
356 (instr2 & kFunctionFieldMask) == JALR)));
357 return patched_return;
361 bool RelocInfo::IsPatchedDebugBreakSlotSequence() {
362 Instr current_instr = Assembler::instr_at(pc_);
363 return !Assembler::IsNop(current_instr, Assembler::DEBUG_BREAK_NOP);
367 void RelocInfo::Visit(Isolate* isolate, ObjectVisitor* visitor) {
368 RelocInfo::Mode mode = rmode();
369 if (mode == RelocInfo::EMBEDDED_OBJECT) {
370 visitor->VisitEmbeddedPointer(this);
371 } else if (RelocInfo::IsCodeTarget(mode)) {
372 visitor->VisitCodeTarget(this);
373 } else if (mode == RelocInfo::CELL) {
374 visitor->VisitCell(this);
375 } else if (mode == RelocInfo::EXTERNAL_REFERENCE) {
376 visitor->VisitExternalReference(this);
377 } else if (RelocInfo::IsCodeAgeSequence(mode)) {
378 visitor->VisitCodeAgeSequence(this);
379 } else if (((RelocInfo::IsJSReturn(mode) &&
380 IsPatchedReturnSequence()) ||
381 (RelocInfo::IsDebugBreakSlot(mode) &&
382 IsPatchedDebugBreakSlotSequence())) &&
383 isolate->debug()->has_break_points()) {
384 visitor->VisitDebugTarget(this);
385 } else if (RelocInfo::IsRuntimeEntry(mode)) {
386 visitor->VisitRuntimeEntry(this);
391 template<typename StaticVisitor>
392 void RelocInfo::Visit(Heap* heap) {
393 RelocInfo::Mode mode = rmode();
394 if (mode == RelocInfo::EMBEDDED_OBJECT) {
395 StaticVisitor::VisitEmbeddedPointer(heap, this);
396 } else if (RelocInfo::IsCodeTarget(mode)) {
397 StaticVisitor::VisitCodeTarget(heap, this);
398 } else if (mode == RelocInfo::CELL) {
399 StaticVisitor::VisitCell(heap, this);
400 } else if (mode == RelocInfo::EXTERNAL_REFERENCE) {
401 StaticVisitor::VisitExternalReference(this);
402 } else if (RelocInfo::IsCodeAgeSequence(mode)) {
403 StaticVisitor::VisitCodeAgeSequence(heap, this);
404 } else if (heap->isolate()->debug()->has_break_points() &&
405 ((RelocInfo::IsJSReturn(mode) &&
406 IsPatchedReturnSequence()) ||
407 (RelocInfo::IsDebugBreakSlot(mode) &&
408 IsPatchedDebugBreakSlotSequence()))) {
409 StaticVisitor::VisitDebugTarget(heap, this);
410 } else if (RelocInfo::IsRuntimeEntry(mode)) {
411 StaticVisitor::VisitRuntimeEntry(this);
416 // -----------------------------------------------------------------------------
420 void Assembler::CheckBuffer() {
421 if (buffer_space() <= kGap) {
427 void Assembler::CheckTrampolinePoolQuick() {
428 if (pc_offset() >= next_buffer_check_) {
429 CheckTrampolinePool();
434 void Assembler::emit(Instr x) {
435 if (!is_buffer_growth_blocked()) {
438 *reinterpret_cast<Instr*>(pc_) = x;
440 CheckTrampolinePoolQuick();
444 } } // namespace v8::internal
446 #endif // V8_MIPS_ASSEMBLER_MIPS_INL_H_