| // Copyright (c) 1994-2006 Sun Microsystems Inc. |
| // 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. |
| // |
| // - Redistribution 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 Sun Microsystems or the names of 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. |
| |
| // The original source code covered by the above license above has been modified |
| // significantly by Google Inc. |
| // Copyright 2014 the V8 project authors. All rights reserved. |
| |
| #ifndef V8_PPC_ASSEMBLER_PPC_INL_H_ |
| #define V8_PPC_ASSEMBLER_PPC_INL_H_ |
| |
| #include "src/ppc/assembler-ppc.h" |
| |
| #include "src/assembler.h" |
| #include "src/debug/debug.h" |
| |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| bool CpuFeatures::SupportsCrankshaft() { return true; } |
| |
| |
| void RelocInfo::apply(intptr_t delta) { |
| // absolute code pointer inside code object moves with the code object. |
| if (IsInternalReference(rmode_)) { |
| // Jump table entry |
| Address target = Memory::Address_at(pc_); |
| Memory::Address_at(pc_) = target + delta; |
| } else { |
| // mov sequence |
| DCHECK(IsInternalReferenceEncoded(rmode_)); |
| Address target = Assembler::target_address_at(pc_, host_); |
| Assembler::set_target_address_at(isolate_, pc_, host_, target + delta, |
| SKIP_ICACHE_FLUSH); |
| } |
| } |
| |
| |
| Address RelocInfo::target_internal_reference() { |
| if (IsInternalReference(rmode_)) { |
| // Jump table entry |
| return Memory::Address_at(pc_); |
| } else { |
| // mov sequence |
| DCHECK(IsInternalReferenceEncoded(rmode_)); |
| return Assembler::target_address_at(pc_, host_); |
| } |
| } |
| |
| |
| Address RelocInfo::target_internal_reference_address() { |
| DCHECK(IsInternalReference(rmode_) || IsInternalReferenceEncoded(rmode_)); |
| return reinterpret_cast<Address>(pc_); |
| } |
| |
| |
| Address RelocInfo::target_address() { |
| DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)); |
| return Assembler::target_address_at(pc_, host_); |
| } |
| |
| |
| Address RelocInfo::target_address_address() { |
| DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_) || |
| rmode_ == EMBEDDED_OBJECT || rmode_ == EXTERNAL_REFERENCE); |
| |
| if (FLAG_enable_embedded_constant_pool && |
| Assembler::IsConstantPoolLoadStart(pc_)) { |
| // We return the PC for embedded constant pool since this function is used |
| // by the serializer and expects the address to reside within the code |
| // object. |
| return reinterpret_cast<Address>(pc_); |
| } |
| |
| // Read the address of the word containing the target_address in an |
| // instruction stream. |
| // The only architecture-independent user of this function is the serializer. |
| // The serializer uses it to find out how many raw bytes of instruction to |
| // output before the next target. |
| // For an instruction like LIS/ORI where the target bits are mixed into the |
| // instruction bits, the size of the target will be zero, indicating that the |
| // serializer should not step forward in memory after a target is resolved |
| // and written. |
| return reinterpret_cast<Address>(pc_); |
| } |
| |
| |
| Address RelocInfo::constant_pool_entry_address() { |
| if (FLAG_enable_embedded_constant_pool) { |
| Address constant_pool = host_->constant_pool(); |
| DCHECK(constant_pool); |
| ConstantPoolEntry::Access access; |
| if (Assembler::IsConstantPoolLoadStart(pc_, &access)) |
| return Assembler::target_constant_pool_address_at( |
| pc_, constant_pool, access, ConstantPoolEntry::INTPTR); |
| } |
| UNREACHABLE(); |
| return NULL; |
| } |
| |
| |
| int RelocInfo::target_address_size() { return Assembler::kSpecialTargetSize; } |
| |
| |
| void RelocInfo::set_target_address(Address target, |
| WriteBarrierMode write_barrier_mode, |
| ICacheFlushMode icache_flush_mode) { |
| DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)); |
| Assembler::set_target_address_at(isolate_, pc_, host_, target, |
| icache_flush_mode); |
| if (write_barrier_mode == UPDATE_WRITE_BARRIER && host() != NULL && |
| IsCodeTarget(rmode_)) { |
| Object* target_code = Code::GetCodeFromTargetAddress(target); |
| host()->GetHeap()->incremental_marking()->RecordWriteIntoCode( |
| host(), this, HeapObject::cast(target_code)); |
| } |
| } |
| |
| |
| Address Assembler::target_address_from_return_address(Address pc) { |
| // Returns the address of the call target from the return address that will |
| // be returned to after a call. |
| // Call sequence is : |
| // mov ip, @ call address |
| // mtlr ip |
| // blrl |
| // @ return address |
| int len; |
| ConstantPoolEntry::Access access; |
| if (FLAG_enable_embedded_constant_pool && |
| IsConstantPoolLoadEnd(pc - 3 * kInstrSize, &access)) { |
| len = (access == ConstantPoolEntry::OVERFLOWED) ? 2 : 1; |
| } else { |
| len = kMovInstructionsNoConstantPool; |
| } |
| return pc - (len + 2) * kInstrSize; |
| } |
| |
| |
| Address Assembler::return_address_from_call_start(Address pc) { |
| int len; |
| ConstantPoolEntry::Access access; |
| if (FLAG_enable_embedded_constant_pool && |
| IsConstantPoolLoadStart(pc, &access)) { |
| len = (access == ConstantPoolEntry::OVERFLOWED) ? 2 : 1; |
| } else { |
| len = kMovInstructionsNoConstantPool; |
| } |
| return pc + (len + 2) * kInstrSize; |
| } |
| |
| |
| Object* RelocInfo::target_object() { |
| DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
| return reinterpret_cast<Object*>(Assembler::target_address_at(pc_, host_)); |
| } |
| |
| |
| Handle<Object> RelocInfo::target_object_handle(Assembler* origin) { |
| DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
| return Handle<Object>( |
| reinterpret_cast<Object**>(Assembler::target_address_at(pc_, host_))); |
| } |
| |
| |
| void RelocInfo::set_target_object(Object* target, |
| WriteBarrierMode write_barrier_mode, |
| ICacheFlushMode icache_flush_mode) { |
| DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
| Assembler::set_target_address_at(isolate_, pc_, host_, |
| reinterpret_cast<Address>(target), |
| icache_flush_mode); |
| if (write_barrier_mode == UPDATE_WRITE_BARRIER && host() != NULL && |
| target->IsHeapObject()) { |
| host()->GetHeap()->incremental_marking()->RecordWriteIntoCode( |
| host(), this, HeapObject::cast(target)); |
| } |
| } |
| |
| |
| Address RelocInfo::target_external_reference() { |
| DCHECK(rmode_ == EXTERNAL_REFERENCE); |
| return Assembler::target_address_at(pc_, host_); |
| } |
| |
| |
| Address RelocInfo::target_runtime_entry(Assembler* origin) { |
| DCHECK(IsRuntimeEntry(rmode_)); |
| return target_address(); |
| } |
| |
| |
| void RelocInfo::set_target_runtime_entry(Address target, |
| WriteBarrierMode write_barrier_mode, |
| ICacheFlushMode icache_flush_mode) { |
| DCHECK(IsRuntimeEntry(rmode_)); |
| if (target_address() != target) |
| set_target_address(target, write_barrier_mode, icache_flush_mode); |
| } |
| |
| |
| Handle<Cell> RelocInfo::target_cell_handle() { |
| DCHECK(rmode_ == RelocInfo::CELL); |
| Address address = Memory::Address_at(pc_); |
| return Handle<Cell>(reinterpret_cast<Cell**>(address)); |
| } |
| |
| |
| Cell* RelocInfo::target_cell() { |
| DCHECK(rmode_ == RelocInfo::CELL); |
| return Cell::FromValueAddress(Memory::Address_at(pc_)); |
| } |
| |
| |
| void RelocInfo::set_target_cell(Cell* cell, WriteBarrierMode write_barrier_mode, |
| ICacheFlushMode icache_flush_mode) { |
| DCHECK(rmode_ == RelocInfo::CELL); |
| Address address = cell->address() + Cell::kValueOffset; |
| Memory::Address_at(pc_) = address; |
| if (write_barrier_mode == UPDATE_WRITE_BARRIER && host() != NULL) { |
| host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(host(), this, |
| cell); |
| } |
| } |
| |
| |
| static const int kNoCodeAgeInstructions = |
| FLAG_enable_embedded_constant_pool ? 7 : 6; |
| static const int kCodeAgingInstructions = |
| Assembler::kMovInstructionsNoConstantPool + 3; |
| static const int kNoCodeAgeSequenceInstructions = |
| ((kNoCodeAgeInstructions >= kCodeAgingInstructions) |
| ? kNoCodeAgeInstructions |
| : kCodeAgingInstructions); |
| static const int kNoCodeAgeSequenceNops = |
| (kNoCodeAgeSequenceInstructions - kNoCodeAgeInstructions); |
| static const int kCodeAgingSequenceNops = |
| (kNoCodeAgeSequenceInstructions - kCodeAgingInstructions); |
| static const int kCodeAgingTargetDelta = 1 * Assembler::kInstrSize; |
| static const int kNoCodeAgeSequenceLength = |
| (kNoCodeAgeSequenceInstructions * Assembler::kInstrSize); |
| |
| |
| Handle<Object> RelocInfo::code_age_stub_handle(Assembler* origin) { |
| UNREACHABLE(); // This should never be reached on PPC. |
| return Handle<Object>(); |
| } |
| |
| |
| Code* RelocInfo::code_age_stub() { |
| DCHECK(rmode_ == RelocInfo::CODE_AGE_SEQUENCE); |
| return Code::GetCodeFromTargetAddress( |
| Assembler::target_address_at(pc_ + kCodeAgingTargetDelta, host_)); |
| } |
| |
| |
| void RelocInfo::set_code_age_stub(Code* stub, |
| ICacheFlushMode icache_flush_mode) { |
| DCHECK(rmode_ == RelocInfo::CODE_AGE_SEQUENCE); |
| Assembler::set_target_address_at(isolate_, pc_ + kCodeAgingTargetDelta, host_, |
| stub->instruction_start(), |
| icache_flush_mode); |
| } |
| |
| |
| Address RelocInfo::debug_call_address() { |
| DCHECK(IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence()); |
| return Assembler::target_address_at(pc_, host_); |
| } |
| |
| |
| void RelocInfo::set_debug_call_address(Address target) { |
| DCHECK(IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence()); |
| Assembler::set_target_address_at(isolate_, pc_, host_, target); |
| if (host() != NULL) { |
| Object* target_code = Code::GetCodeFromTargetAddress(target); |
| host()->GetHeap()->incremental_marking()->RecordWriteIntoCode( |
| host(), this, HeapObject::cast(target_code)); |
| } |
| } |
| |
| |
| void RelocInfo::WipeOut() { |
| DCHECK(IsEmbeddedObject(rmode_) || IsCodeTarget(rmode_) || |
| IsRuntimeEntry(rmode_) || IsExternalReference(rmode_) || |
| IsInternalReference(rmode_) || IsInternalReferenceEncoded(rmode_)); |
| if (IsInternalReference(rmode_)) { |
| // Jump table entry |
| Memory::Address_at(pc_) = NULL; |
| } else if (IsInternalReferenceEncoded(rmode_)) { |
| // mov sequence |
| // Currently used only by deserializer, no need to flush. |
| Assembler::set_target_address_at(isolate_, pc_, host_, NULL, |
| SKIP_ICACHE_FLUSH); |
| } else { |
| Assembler::set_target_address_at(isolate_, pc_, host_, NULL); |
| } |
| } |
| |
| |
| void RelocInfo::Visit(Isolate* isolate, ObjectVisitor* visitor) { |
| RelocInfo::Mode mode = rmode(); |
| if (mode == RelocInfo::EMBEDDED_OBJECT) { |
| visitor->VisitEmbeddedPointer(this); |
| } else if (RelocInfo::IsCodeTarget(mode)) { |
| visitor->VisitCodeTarget(this); |
| } else if (mode == RelocInfo::CELL) { |
| visitor->VisitCell(this); |
| } else if (mode == RelocInfo::EXTERNAL_REFERENCE) { |
| visitor->VisitExternalReference(this); |
| } else if (mode == RelocInfo::INTERNAL_REFERENCE || |
| mode == RelocInfo::INTERNAL_REFERENCE_ENCODED) { |
| visitor->VisitInternalReference(this); |
| } else if (RelocInfo::IsCodeAgeSequence(mode)) { |
| visitor->VisitCodeAgeSequence(this); |
| } else if (RelocInfo::IsDebugBreakSlot(mode) && |
| IsPatchedDebugBreakSlotSequence()) { |
| visitor->VisitDebugTarget(this); |
| } else if (IsRuntimeEntry(mode)) { |
| visitor->VisitRuntimeEntry(this); |
| } |
| } |
| |
| |
| template <typename StaticVisitor> |
| void RelocInfo::Visit(Heap* heap) { |
| RelocInfo::Mode mode = rmode(); |
| if (mode == RelocInfo::EMBEDDED_OBJECT) { |
| StaticVisitor::VisitEmbeddedPointer(heap, this); |
| } else if (RelocInfo::IsCodeTarget(mode)) { |
| StaticVisitor::VisitCodeTarget(heap, this); |
| } else if (mode == RelocInfo::CELL) { |
| StaticVisitor::VisitCell(heap, this); |
| } else if (mode == RelocInfo::EXTERNAL_REFERENCE) { |
| StaticVisitor::VisitExternalReference(this); |
| } else if (mode == RelocInfo::INTERNAL_REFERENCE || |
| mode == RelocInfo::INTERNAL_REFERENCE_ENCODED) { |
| StaticVisitor::VisitInternalReference(this); |
| } else if (RelocInfo::IsCodeAgeSequence(mode)) { |
| StaticVisitor::VisitCodeAgeSequence(heap, this); |
| } else if (RelocInfo::IsDebugBreakSlot(mode) && |
| IsPatchedDebugBreakSlotSequence()) { |
| StaticVisitor::VisitDebugTarget(heap, this); |
| } else if (IsRuntimeEntry(mode)) { |
| StaticVisitor::VisitRuntimeEntry(this); |
| } |
| } |
| |
| Operand::Operand(intptr_t immediate, RelocInfo::Mode rmode) { |
| rm_ = no_reg; |
| imm_ = immediate; |
| rmode_ = rmode; |
| } |
| |
| Operand::Operand(const ExternalReference& f) { |
| rm_ = no_reg; |
| imm_ = reinterpret_cast<intptr_t>(f.address()); |
| rmode_ = RelocInfo::EXTERNAL_REFERENCE; |
| } |
| |
| Operand::Operand(Smi* value) { |
| rm_ = no_reg; |
| imm_ = reinterpret_cast<intptr_t>(value); |
| rmode_ = kRelocInfo_NONEPTR; |
| } |
| |
| Operand::Operand(Register rm) { |
| rm_ = rm; |
| rmode_ = kRelocInfo_NONEPTR; // PPC -why doesn't ARM do this? |
| } |
| |
| void Assembler::CheckBuffer() { |
| if (buffer_space() <= kGap) { |
| GrowBuffer(); |
| } |
| } |
| |
| void Assembler::TrackBranch() { |
| DCHECK(!trampoline_emitted_); |
| int count = tracked_branch_count_++; |
| if (count == 0) { |
| // We leave space (kMaxBlockTrampolineSectionSize) |
| // for BlockTrampolinePoolScope buffer. |
| next_trampoline_check_ = |
| pc_offset() + kMaxCondBranchReach - kMaxBlockTrampolineSectionSize; |
| } else { |
| next_trampoline_check_ -= kTrampolineSlotsSize; |
| } |
| } |
| |
| void Assembler::UntrackBranch() { |
| DCHECK(!trampoline_emitted_); |
| DCHECK(tracked_branch_count_ > 0); |
| int count = --tracked_branch_count_; |
| if (count == 0) { |
| // Reset |
| next_trampoline_check_ = kMaxInt; |
| } else { |
| next_trampoline_check_ += kTrampolineSlotsSize; |
| } |
| } |
| |
| void Assembler::CheckTrampolinePoolQuick() { |
| if (pc_offset() >= next_trampoline_check_) { |
| CheckTrampolinePool(); |
| } |
| } |
| |
| void Assembler::emit(Instr x) { |
| CheckBuffer(); |
| *reinterpret_cast<Instr*>(pc_) = x; |
| pc_ += kInstrSize; |
| CheckTrampolinePoolQuick(); |
| } |
| |
| bool Operand::is_reg() const { return rm_.is_valid(); } |
| |
| |
| // Fetch the 32bit value from the FIXED_SEQUENCE lis/ori |
| Address Assembler::target_address_at(Address pc, Address constant_pool) { |
| if (FLAG_enable_embedded_constant_pool && constant_pool) { |
| ConstantPoolEntry::Access access; |
| if (IsConstantPoolLoadStart(pc, &access)) |
| return Memory::Address_at(target_constant_pool_address_at( |
| pc, constant_pool, access, ConstantPoolEntry::INTPTR)); |
| } |
| |
| Instr instr1 = instr_at(pc); |
| Instr instr2 = instr_at(pc + kInstrSize); |
| // Interpret 2 instructions generated by lis/ori |
| if (IsLis(instr1) && IsOri(instr2)) { |
| #if V8_TARGET_ARCH_PPC64 |
| Instr instr4 = instr_at(pc + (3 * kInstrSize)); |
| Instr instr5 = instr_at(pc + (4 * kInstrSize)); |
| // Assemble the 64 bit value. |
| uint64_t hi = (static_cast<uint32_t>((instr1 & kImm16Mask) << 16) | |
| static_cast<uint32_t>(instr2 & kImm16Mask)); |
| uint64_t lo = (static_cast<uint32_t>((instr4 & kImm16Mask) << 16) | |
| static_cast<uint32_t>(instr5 & kImm16Mask)); |
| return reinterpret_cast<Address>((hi << 32) | lo); |
| #else |
| // Assemble the 32 bit value. |
| return reinterpret_cast<Address>(((instr1 & kImm16Mask) << 16) | |
| (instr2 & kImm16Mask)); |
| #endif |
| } |
| |
| UNREACHABLE(); |
| return NULL; |
| } |
| |
| |
| #if V8_TARGET_ARCH_PPC64 |
| const int kLoadIntptrOpcode = LD; |
| #else |
| const int kLoadIntptrOpcode = LWZ; |
| #endif |
| |
| // Constant pool load sequence detection: |
| // 1) REGULAR access: |
| // load <dst>, kConstantPoolRegister + <offset> |
| // |
| // 2) OVERFLOWED access: |
| // addis <scratch>, kConstantPoolRegister, <offset_high> |
| // load <dst>, <scratch> + <offset_low> |
| bool Assembler::IsConstantPoolLoadStart(Address pc, |
| ConstantPoolEntry::Access* access) { |
| Instr instr = instr_at(pc); |
| int opcode = instr & kOpcodeMask; |
| if (!GetRA(instr).is(kConstantPoolRegister)) return false; |
| bool overflowed = (opcode == ADDIS); |
| #ifdef DEBUG |
| if (overflowed) { |
| opcode = instr_at(pc + kInstrSize) & kOpcodeMask; |
| } |
| DCHECK(opcode == kLoadIntptrOpcode || opcode == LFD); |
| #endif |
| if (access) { |
| *access = (overflowed ? ConstantPoolEntry::OVERFLOWED |
| : ConstantPoolEntry::REGULAR); |
| } |
| return true; |
| } |
| |
| |
| bool Assembler::IsConstantPoolLoadEnd(Address pc, |
| ConstantPoolEntry::Access* access) { |
| Instr instr = instr_at(pc); |
| int opcode = instr & kOpcodeMask; |
| bool overflowed = false; |
| if (!(opcode == kLoadIntptrOpcode || opcode == LFD)) return false; |
| if (!GetRA(instr).is(kConstantPoolRegister)) { |
| instr = instr_at(pc - kInstrSize); |
| opcode = instr & kOpcodeMask; |
| if ((opcode != ADDIS) || !GetRA(instr).is(kConstantPoolRegister)) { |
| return false; |
| } |
| overflowed = true; |
| } |
| if (access) { |
| *access = (overflowed ? ConstantPoolEntry::OVERFLOWED |
| : ConstantPoolEntry::REGULAR); |
| } |
| return true; |
| } |
| |
| |
| int Assembler::GetConstantPoolOffset(Address pc, |
| ConstantPoolEntry::Access access, |
| ConstantPoolEntry::Type type) { |
| bool overflowed = (access == ConstantPoolEntry::OVERFLOWED); |
| #ifdef DEBUG |
| ConstantPoolEntry::Access access_check = |
| static_cast<ConstantPoolEntry::Access>(-1); |
| DCHECK(IsConstantPoolLoadStart(pc, &access_check)); |
| DCHECK(access_check == access); |
| #endif |
| int offset; |
| if (overflowed) { |
| offset = (instr_at(pc) & kImm16Mask) << 16; |
| offset += SIGN_EXT_IMM16(instr_at(pc + kInstrSize) & kImm16Mask); |
| DCHECK(!is_int16(offset)); |
| } else { |
| offset = SIGN_EXT_IMM16((instr_at(pc) & kImm16Mask)); |
| } |
| return offset; |
| } |
| |
| |
| void Assembler::PatchConstantPoolAccessInstruction( |
| int pc_offset, int offset, ConstantPoolEntry::Access access, |
| ConstantPoolEntry::Type type) { |
| Address pc = buffer_ + pc_offset; |
| bool overflowed = (access == ConstantPoolEntry::OVERFLOWED); |
| CHECK(overflowed != is_int16(offset)); |
| #ifdef DEBUG |
| ConstantPoolEntry::Access access_check = |
| static_cast<ConstantPoolEntry::Access>(-1); |
| DCHECK(IsConstantPoolLoadStart(pc, &access_check)); |
| DCHECK(access_check == access); |
| #endif |
| if (overflowed) { |
| int hi_word = static_cast<int>(offset >> 16); |
| int lo_word = static_cast<int>(offset & 0xffff); |
| if (lo_word & 0x8000) hi_word++; |
| |
| Instr instr1 = instr_at(pc); |
| Instr instr2 = instr_at(pc + kInstrSize); |
| instr1 &= ~kImm16Mask; |
| instr1 |= (hi_word & kImm16Mask); |
| instr2 &= ~kImm16Mask; |
| instr2 |= (lo_word & kImm16Mask); |
| instr_at_put(pc, instr1); |
| instr_at_put(pc + kInstrSize, instr2); |
| } else { |
| Instr instr = instr_at(pc); |
| instr &= ~kImm16Mask; |
| instr |= (offset & kImm16Mask); |
| instr_at_put(pc, instr); |
| } |
| } |
| |
| |
| Address Assembler::target_constant_pool_address_at( |
| Address pc, Address constant_pool, ConstantPoolEntry::Access access, |
| ConstantPoolEntry::Type type) { |
| Address addr = constant_pool; |
| DCHECK(addr); |
| addr += GetConstantPoolOffset(pc, access, type); |
| return addr; |
| } |
| |
| |
| // This sets the branch destination (which gets loaded at the call address). |
| // This is for calls and branches within generated code. The serializer |
| // has already deserialized the mov instructions etc. |
| // There is a FIXED_SEQUENCE assumption here |
| void Assembler::deserialization_set_special_target_at( |
| Isolate* isolate, Address instruction_payload, Code* code, Address target) { |
| set_target_address_at(isolate, instruction_payload, code, target); |
| } |
| |
| |
| void Assembler::deserialization_set_target_internal_reference_at( |
| Isolate* isolate, Address pc, Address target, RelocInfo::Mode mode) { |
| if (RelocInfo::IsInternalReferenceEncoded(mode)) { |
| Code* code = NULL; |
| set_target_address_at(isolate, pc, code, target, SKIP_ICACHE_FLUSH); |
| } else { |
| Memory::Address_at(pc) = target; |
| } |
| } |
| |
| |
| // This code assumes the FIXED_SEQUENCE of lis/ori |
| void Assembler::set_target_address_at(Isolate* isolate, Address pc, |
| Address constant_pool, Address target, |
| ICacheFlushMode icache_flush_mode) { |
| if (FLAG_enable_embedded_constant_pool && constant_pool) { |
| ConstantPoolEntry::Access access; |
| if (IsConstantPoolLoadStart(pc, &access)) { |
| Memory::Address_at(target_constant_pool_address_at( |
| pc, constant_pool, access, ConstantPoolEntry::INTPTR)) = target; |
| return; |
| } |
| } |
| |
| Instr instr1 = instr_at(pc); |
| Instr instr2 = instr_at(pc + kInstrSize); |
| // Interpret 2 instructions generated by lis/ori |
| if (IsLis(instr1) && IsOri(instr2)) { |
| #if V8_TARGET_ARCH_PPC64 |
| Instr instr4 = instr_at(pc + (3 * kInstrSize)); |
| Instr instr5 = instr_at(pc + (4 * kInstrSize)); |
| // Needs to be fixed up when mov changes to handle 64-bit values. |
| uint32_t* p = reinterpret_cast<uint32_t*>(pc); |
| uintptr_t itarget = reinterpret_cast<uintptr_t>(target); |
| |
| instr5 &= ~kImm16Mask; |
| instr5 |= itarget & kImm16Mask; |
| itarget = itarget >> 16; |
| |
| instr4 &= ~kImm16Mask; |
| instr4 |= itarget & kImm16Mask; |
| itarget = itarget >> 16; |
| |
| instr2 &= ~kImm16Mask; |
| instr2 |= itarget & kImm16Mask; |
| itarget = itarget >> 16; |
| |
| instr1 &= ~kImm16Mask; |
| instr1 |= itarget & kImm16Mask; |
| itarget = itarget >> 16; |
| |
| *p = instr1; |
| *(p + 1) = instr2; |
| *(p + 3) = instr4; |
| *(p + 4) = instr5; |
| if (icache_flush_mode != SKIP_ICACHE_FLUSH) { |
| Assembler::FlushICache(isolate, p, 5 * kInstrSize); |
| } |
| #else |
| uint32_t* p = reinterpret_cast<uint32_t*>(pc); |
| uint32_t itarget = reinterpret_cast<uint32_t>(target); |
| int lo_word = itarget & kImm16Mask; |
| int hi_word = itarget >> 16; |
| instr1 &= ~kImm16Mask; |
| instr1 |= hi_word; |
| instr2 &= ~kImm16Mask; |
| instr2 |= lo_word; |
| |
| *p = instr1; |
| *(p + 1) = instr2; |
| if (icache_flush_mode != SKIP_ICACHE_FLUSH) { |
| Assembler::FlushICache(isolate, p, 2 * kInstrSize); |
| } |
| #endif |
| return; |
| } |
| UNREACHABLE(); |
| } |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_PPC_ASSEMBLER_PPC_INL_H_ |