OLD | NEW |
(Empty) | |
| 1 // Copyright (c) 1994-2006 Sun Microsystems Inc. |
| 2 // All Rights Reserved. |
| 3 // |
| 4 // Redistribution and use in source and binary forms, with or without |
| 5 // modification, are permitted provided that the following conditions |
| 6 // are met: |
| 7 // |
| 8 // - Redistributions of source code must retain the above copyright notice, |
| 9 // this list of conditions and the following disclaimer. |
| 10 // |
| 11 // - Redistribution in binary form must reproduce the above copyright |
| 12 // notice, this list of conditions and the following disclaimer in the |
| 13 // documentation and/or other materials provided with the |
| 14 // distribution. |
| 15 // |
| 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. |
| 19 // |
| 20 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 23 // FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 24 // COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 25 // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 26 // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| 27 // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 // HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 29 // STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 30 // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 31 // OF THE POSSIBILITY OF SUCH DAMAGE. |
| 32 |
| 33 // The original source code covered by the above license above has been modified |
| 34 // significantly by Google Inc. |
| 35 // Copyright 2012 the V8 project authors. All rights reserved. |
| 36 |
| 37 // |
| 38 // Copyright IBM Corp. 2012, 2013. All rights reserved. |
| 39 // |
| 40 |
| 41 #ifndef V8_PPC_ASSEMBLER_PPC_INL_H_ |
| 42 #define V8_PPC_ASSEMBLER_PPC_INL_H_ |
| 43 |
| 44 #include "src/ppc/assembler-ppc.h" |
| 45 |
| 46 #include "src/assembler.h" |
| 47 #include "src/debug.h" |
| 48 |
| 49 |
| 50 namespace v8 { |
| 51 namespace internal { |
| 52 |
| 53 |
| 54 bool CpuFeatures::SupportsCrankshaft() { return true; } |
| 55 |
| 56 |
| 57 void RelocInfo::apply(intptr_t delta, ICacheFlushMode icache_flush_mode) { |
| 58 #if ABI_USES_FUNCTION_DESCRIPTORS || V8_OOL_CONSTANT_POOL |
| 59 if (RelocInfo::IsInternalReference(rmode_)) { |
| 60 // absolute code pointer inside code object moves with the code object. |
| 61 Assembler::RelocateInternalReference(pc_, delta, 0, icache_flush_mode); |
| 62 } |
| 63 #endif |
| 64 // We do not use pc relative addressing on PPC, so there is |
| 65 // nothing else to do. |
| 66 } |
| 67 |
| 68 |
| 69 Address RelocInfo::target_address() { |
| 70 DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)); |
| 71 return Assembler::target_address_at(pc_, host_); |
| 72 } |
| 73 |
| 74 |
| 75 Address RelocInfo::target_address_address() { |
| 76 DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_) || |
| 77 rmode_ == EMBEDDED_OBJECT || rmode_ == EXTERNAL_REFERENCE); |
| 78 |
| 79 #if V8_OOL_CONSTANT_POOL |
| 80 if (Assembler::IsConstantPoolLoadStart(pc_)) { |
| 81 // We return the PC for ool constant pool since this function is used by the |
| 82 // serializerer and expects the address to reside within the code object. |
| 83 return reinterpret_cast<Address>(pc_); |
| 84 } |
| 85 #endif |
| 86 |
| 87 // Read the address of the word containing the target_address in an |
| 88 // instruction stream. |
| 89 // The only architecture-independent user of this function is the serializer. |
| 90 // The serializer uses it to find out how many raw bytes of instruction to |
| 91 // output before the next target. |
| 92 // For an instruction like LIS/ORI where the target bits are mixed into the |
| 93 // instruction bits, the size of the target will be zero, indicating that the |
| 94 // serializer should not step forward in memory after a target is resolved |
| 95 // and written. |
| 96 return reinterpret_cast<Address>(pc_); |
| 97 } |
| 98 |
| 99 |
| 100 Address RelocInfo::constant_pool_entry_address() { |
| 101 #if V8_OOL_CONSTANT_POOL |
| 102 return Assembler::target_constant_pool_address_at(pc_, |
| 103 host_->constant_pool()); |
| 104 #else |
| 105 UNREACHABLE(); |
| 106 return NULL; |
| 107 #endif |
| 108 } |
| 109 |
| 110 |
| 111 int RelocInfo::target_address_size() { return Assembler::kSpecialTargetSize; } |
| 112 |
| 113 |
| 114 void RelocInfo::set_target_address(Address target, |
| 115 WriteBarrierMode write_barrier_mode, |
| 116 ICacheFlushMode icache_flush_mode) { |
| 117 DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)); |
| 118 Assembler::set_target_address_at(pc_, host_, target, icache_flush_mode); |
| 119 if (write_barrier_mode == UPDATE_WRITE_BARRIER && host() != NULL && |
| 120 IsCodeTarget(rmode_)) { |
| 121 Object* target_code = Code::GetCodeFromTargetAddress(target); |
| 122 host()->GetHeap()->incremental_marking()->RecordWriteIntoCode( |
| 123 host(), this, HeapObject::cast(target_code)); |
| 124 } |
| 125 } |
| 126 |
| 127 |
| 128 Address Assembler::break_address_from_return_address(Address pc) { |
| 129 return target_address_from_return_address(pc); |
| 130 } |
| 131 |
| 132 |
| 133 Address Assembler::target_address_from_return_address(Address pc) { |
| 134 // Returns the address of the call target from the return address that will |
| 135 // be returned to after a call. |
| 136 // Call sequence is : |
| 137 // mov ip, @ call address |
| 138 // mtlr ip |
| 139 // blrl |
| 140 // @ return address |
| 141 #if V8_OOL_CONSTANT_POOL |
| 142 if (IsConstantPoolLoadEnd(pc - 3 * kInstrSize)) { |
| 143 return pc - (kMovInstructionsConstantPool + 2) * kInstrSize; |
| 144 } |
| 145 #endif |
| 146 return pc - (kMovInstructionsNoConstantPool + 2) * kInstrSize; |
| 147 } |
| 148 |
| 149 |
| 150 Address Assembler::return_address_from_call_start(Address pc) { |
| 151 #if V8_OOL_CONSTANT_POOL |
| 152 Address load_address = pc + (kMovInstructionsConstantPool - 1) * kInstrSize; |
| 153 if (IsConstantPoolLoadEnd(load_address)) |
| 154 return pc + (kMovInstructionsConstantPool + 2) * kInstrSize; |
| 155 #endif |
| 156 return pc + (kMovInstructionsNoConstantPool + 2) * kInstrSize; |
| 157 } |
| 158 |
| 159 |
| 160 Object* RelocInfo::target_object() { |
| 161 DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
| 162 return reinterpret_cast<Object*>(Assembler::target_address_at(pc_, host_)); |
| 163 } |
| 164 |
| 165 |
| 166 Handle<Object> RelocInfo::target_object_handle(Assembler* origin) { |
| 167 DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
| 168 return Handle<Object>( |
| 169 reinterpret_cast<Object**>(Assembler::target_address_at(pc_, host_))); |
| 170 } |
| 171 |
| 172 |
| 173 void RelocInfo::set_target_object(Object* target, |
| 174 WriteBarrierMode write_barrier_mode, |
| 175 ICacheFlushMode icache_flush_mode) { |
| 176 DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
| 177 Assembler::set_target_address_at( |
| 178 pc_, host_, reinterpret_cast<Address>(target), icache_flush_mode); |
| 179 if (write_barrier_mode == UPDATE_WRITE_BARRIER && host() != NULL && |
| 180 target->IsHeapObject()) { |
| 181 host()->GetHeap()->incremental_marking()->RecordWrite( |
| 182 host(), &Memory::Object_at(pc_), HeapObject::cast(target)); |
| 183 } |
| 184 } |
| 185 |
| 186 |
| 187 Address RelocInfo::target_reference() { |
| 188 DCHECK(rmode_ == EXTERNAL_REFERENCE); |
| 189 return Assembler::target_address_at(pc_, host_); |
| 190 } |
| 191 |
| 192 |
| 193 Address RelocInfo::target_runtime_entry(Assembler* origin) { |
| 194 DCHECK(IsRuntimeEntry(rmode_)); |
| 195 return target_address(); |
| 196 } |
| 197 |
| 198 |
| 199 void RelocInfo::set_target_runtime_entry(Address target, |
| 200 WriteBarrierMode write_barrier_mode, |
| 201 ICacheFlushMode icache_flush_mode) { |
| 202 DCHECK(IsRuntimeEntry(rmode_)); |
| 203 if (target_address() != target) |
| 204 set_target_address(target, write_barrier_mode, icache_flush_mode); |
| 205 } |
| 206 |
| 207 |
| 208 Handle<Cell> RelocInfo::target_cell_handle() { |
| 209 DCHECK(rmode_ == RelocInfo::CELL); |
| 210 Address address = Memory::Address_at(pc_); |
| 211 return Handle<Cell>(reinterpret_cast<Cell**>(address)); |
| 212 } |
| 213 |
| 214 |
| 215 Cell* RelocInfo::target_cell() { |
| 216 DCHECK(rmode_ == RelocInfo::CELL); |
| 217 return Cell::FromValueAddress(Memory::Address_at(pc_)); |
| 218 } |
| 219 |
| 220 |
| 221 void RelocInfo::set_target_cell(Cell* cell, WriteBarrierMode write_barrier_mode, |
| 222 ICacheFlushMode icache_flush_mode) { |
| 223 DCHECK(rmode_ == RelocInfo::CELL); |
| 224 Address address = cell->address() + Cell::kValueOffset; |
| 225 Memory::Address_at(pc_) = address; |
| 226 if (write_barrier_mode == UPDATE_WRITE_BARRIER && host() != NULL) { |
| 227 // TODO(1550) We are passing NULL as a slot because cell can never be on |
| 228 // evacuation candidate. |
| 229 host()->GetHeap()->incremental_marking()->RecordWrite(host(), NULL, cell); |
| 230 } |
| 231 } |
| 232 |
| 233 |
| 234 #if V8_OOL_CONSTANT_POOL |
| 235 static const int kNoCodeAgeInstructions = 7; |
| 236 #else |
| 237 static const int kNoCodeAgeInstructions = 6; |
| 238 #endif |
| 239 static const int kCodeAgingInstructions = |
| 240 Assembler::kMovInstructionsNoConstantPool + 3; |
| 241 static const int kNoCodeAgeSequenceInstructions = |
| 242 ((kNoCodeAgeInstructions >= kCodeAgingInstructions) |
| 243 ? kNoCodeAgeInstructions |
| 244 : kCodeAgingInstructions); |
| 245 static const int kNoCodeAgeSequenceNops = |
| 246 (kNoCodeAgeSequenceInstructions - kNoCodeAgeInstructions); |
| 247 static const int kCodeAgingSequenceNops = |
| 248 (kNoCodeAgeSequenceInstructions - kCodeAgingInstructions); |
| 249 static const int kCodeAgingTargetDelta = 1 * Assembler::kInstrSize; |
| 250 static const int kCodeAgingPatchDelta = |
| 251 (kCodeAgingInstructions * Assembler::kInstrSize); |
| 252 static const int kNoCodeAgeSequenceLength = |
| 253 (kNoCodeAgeSequenceInstructions * Assembler::kInstrSize); |
| 254 |
| 255 |
| 256 Handle<Object> RelocInfo::code_age_stub_handle(Assembler* origin) { |
| 257 UNREACHABLE(); // This should never be reached on PPC. |
| 258 return Handle<Object>(); |
| 259 } |
| 260 |
| 261 |
| 262 Code* RelocInfo::code_age_stub() { |
| 263 DCHECK(rmode_ == RelocInfo::CODE_AGE_SEQUENCE); |
| 264 return Code::GetCodeFromTargetAddress( |
| 265 Assembler::target_address_at(pc_ + kCodeAgingTargetDelta, host_)); |
| 266 } |
| 267 |
| 268 |
| 269 void RelocInfo::set_code_age_stub(Code* stub, |
| 270 ICacheFlushMode icache_flush_mode) { |
| 271 DCHECK(rmode_ == RelocInfo::CODE_AGE_SEQUENCE); |
| 272 Assembler::set_target_address_at(pc_ + kCodeAgingTargetDelta, host_, |
| 273 stub->instruction_start(), |
| 274 icache_flush_mode); |
| 275 } |
| 276 |
| 277 |
| 278 Address RelocInfo::call_address() { |
| 279 DCHECK((IsJSReturn(rmode()) && IsPatchedReturnSequence()) || |
| 280 (IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence())); |
| 281 // The pc_ offset of 0 assumes patched return sequence per |
| 282 // BreakLocationIterator::SetDebugBreakAtReturn(), or debug break |
| 283 // slot per BreakLocationIterator::SetDebugBreakAtSlot(). |
| 284 return Assembler::target_address_at(pc_, host_); |
| 285 } |
| 286 |
| 287 |
| 288 void RelocInfo::set_call_address(Address target) { |
| 289 DCHECK((IsJSReturn(rmode()) && IsPatchedReturnSequence()) || |
| 290 (IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence())); |
| 291 Assembler::set_target_address_at(pc_, host_, target); |
| 292 if (host() != NULL) { |
| 293 Object* target_code = Code::GetCodeFromTargetAddress(target); |
| 294 host()->GetHeap()->incremental_marking()->RecordWriteIntoCode( |
| 295 host(), this, HeapObject::cast(target_code)); |
| 296 } |
| 297 } |
| 298 |
| 299 |
| 300 Object* RelocInfo::call_object() { return *call_object_address(); } |
| 301 |
| 302 |
| 303 void RelocInfo::set_call_object(Object* target) { |
| 304 *call_object_address() = target; |
| 305 } |
| 306 |
| 307 |
| 308 Object** RelocInfo::call_object_address() { |
| 309 DCHECK((IsJSReturn(rmode()) && IsPatchedReturnSequence()) || |
| 310 (IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence())); |
| 311 return reinterpret_cast<Object**>(pc_ + 2 * Assembler::kInstrSize); |
| 312 } |
| 313 |
| 314 |
| 315 void RelocInfo::WipeOut() { |
| 316 DCHECK(IsEmbeddedObject(rmode_) || IsCodeTarget(rmode_) || |
| 317 IsRuntimeEntry(rmode_) || IsExternalReference(rmode_)); |
| 318 Assembler::set_target_address_at(pc_, host_, NULL); |
| 319 } |
| 320 |
| 321 |
| 322 bool RelocInfo::IsPatchedReturnSequence() { |
| 323 // |
| 324 // The patched return sequence is defined by |
| 325 // BreakLocationIterator::SetDebugBreakAtReturn() |
| 326 // FIXED_SEQUENCE |
| 327 |
| 328 Instr instr0 = Assembler::instr_at(pc_); |
| 329 Instr instr1 = Assembler::instr_at(pc_ + 1 * Assembler::kInstrSize); |
| 330 #if V8_TARGET_ARCH_PPC64 |
| 331 Instr instr3 = Assembler::instr_at(pc_ + (3 * Assembler::kInstrSize)); |
| 332 Instr instr4 = Assembler::instr_at(pc_ + (4 * Assembler::kInstrSize)); |
| 333 Instr binstr = Assembler::instr_at(pc_ + (7 * Assembler::kInstrSize)); |
| 334 #else |
| 335 Instr binstr = Assembler::instr_at(pc_ + 4 * Assembler::kInstrSize); |
| 336 #endif |
| 337 bool patched_return = |
| 338 ((instr0 & kOpcodeMask) == ADDIS && (instr1 & kOpcodeMask) == ORI && |
| 339 #if V8_TARGET_ARCH_PPC64 |
| 340 (instr3 & kOpcodeMask) == ORIS && (instr4 & kOpcodeMask) == ORI && |
| 341 #endif |
| 342 (binstr == 0x7d821008)); // twge r2, r2 |
| 343 |
| 344 // printf("IsPatchedReturnSequence: %d\n", patched_return); |
| 345 return patched_return; |
| 346 } |
| 347 |
| 348 |
| 349 bool RelocInfo::IsPatchedDebugBreakSlotSequence() { |
| 350 Instr current_instr = Assembler::instr_at(pc_); |
| 351 return !Assembler::IsNop(current_instr, Assembler::DEBUG_BREAK_NOP); |
| 352 } |
| 353 |
| 354 |
| 355 void RelocInfo::Visit(Isolate* isolate, ObjectVisitor* visitor) { |
| 356 RelocInfo::Mode mode = rmode(); |
| 357 if (mode == RelocInfo::EMBEDDED_OBJECT) { |
| 358 visitor->VisitEmbeddedPointer(this); |
| 359 } else if (RelocInfo::IsCodeTarget(mode)) { |
| 360 visitor->VisitCodeTarget(this); |
| 361 } else if (mode == RelocInfo::CELL) { |
| 362 visitor->VisitCell(this); |
| 363 } else if (mode == RelocInfo::EXTERNAL_REFERENCE) { |
| 364 visitor->VisitExternalReference(this); |
| 365 } else if (RelocInfo::IsCodeAgeSequence(mode)) { |
| 366 visitor->VisitCodeAgeSequence(this); |
| 367 } else if (((RelocInfo::IsJSReturn(mode) && IsPatchedReturnSequence()) || |
| 368 (RelocInfo::IsDebugBreakSlot(mode) && |
| 369 IsPatchedDebugBreakSlotSequence())) && |
| 370 isolate->debug()->has_break_points()) { |
| 371 visitor->VisitDebugTarget(this); |
| 372 } else if (IsRuntimeEntry(mode)) { |
| 373 visitor->VisitRuntimeEntry(this); |
| 374 } |
| 375 } |
| 376 |
| 377 |
| 378 template <typename StaticVisitor> |
| 379 void RelocInfo::Visit(Heap* heap) { |
| 380 RelocInfo::Mode mode = rmode(); |
| 381 if (mode == RelocInfo::EMBEDDED_OBJECT) { |
| 382 StaticVisitor::VisitEmbeddedPointer(heap, this); |
| 383 } else if (RelocInfo::IsCodeTarget(mode)) { |
| 384 StaticVisitor::VisitCodeTarget(heap, this); |
| 385 } else if (mode == RelocInfo::CELL) { |
| 386 StaticVisitor::VisitCell(heap, this); |
| 387 } else if (mode == RelocInfo::EXTERNAL_REFERENCE) { |
| 388 StaticVisitor::VisitExternalReference(this); |
| 389 } else if (RelocInfo::IsCodeAgeSequence(mode)) { |
| 390 StaticVisitor::VisitCodeAgeSequence(heap, this); |
| 391 } else if (heap->isolate()->debug()->has_break_points() && |
| 392 ((RelocInfo::IsJSReturn(mode) && IsPatchedReturnSequence()) || |
| 393 (RelocInfo::IsDebugBreakSlot(mode) && |
| 394 IsPatchedDebugBreakSlotSequence()))) { |
| 395 StaticVisitor::VisitDebugTarget(heap, this); |
| 396 } else if (IsRuntimeEntry(mode)) { |
| 397 StaticVisitor::VisitRuntimeEntry(this); |
| 398 } |
| 399 } |
| 400 |
| 401 Operand::Operand(intptr_t immediate, RelocInfo::Mode rmode) { |
| 402 rm_ = no_reg; |
| 403 imm_ = immediate; |
| 404 rmode_ = rmode; |
| 405 } |
| 406 |
| 407 Operand::Operand(const ExternalReference& f) { |
| 408 rm_ = no_reg; |
| 409 imm_ = reinterpret_cast<intptr_t>(f.address()); |
| 410 rmode_ = RelocInfo::EXTERNAL_REFERENCE; |
| 411 } |
| 412 |
| 413 Operand::Operand(Smi* value) { |
| 414 rm_ = no_reg; |
| 415 imm_ = reinterpret_cast<intptr_t>(value); |
| 416 rmode_ = kRelocInfo_NONEPTR; |
| 417 } |
| 418 |
| 419 Operand::Operand(Register rm) { |
| 420 rm_ = rm; |
| 421 rmode_ = kRelocInfo_NONEPTR; // PPC -why doesn't ARM do this? |
| 422 } |
| 423 |
| 424 void Assembler::CheckBuffer() { |
| 425 if (buffer_space() <= kGap) { |
| 426 GrowBuffer(); |
| 427 } |
| 428 } |
| 429 |
| 430 void Assembler::CheckTrampolinePoolQuick() { |
| 431 if (pc_offset() >= next_buffer_check_) { |
| 432 CheckTrampolinePool(); |
| 433 } |
| 434 } |
| 435 |
| 436 void Assembler::emit(Instr x) { |
| 437 CheckBuffer(); |
| 438 *reinterpret_cast<Instr*>(pc_) = x; |
| 439 pc_ += kInstrSize; |
| 440 CheckTrampolinePoolQuick(); |
| 441 } |
| 442 |
| 443 bool Operand::is_reg() const { return rm_.is_valid(); } |
| 444 |
| 445 |
| 446 // Fetch the 32bit value from the FIXED_SEQUENCE lis/ori |
| 447 Address Assembler::target_address_at(Address pc, |
| 448 ConstantPoolArray* constant_pool) { |
| 449 Instr instr1 = instr_at(pc); |
| 450 Instr instr2 = instr_at(pc + kInstrSize); |
| 451 // Interpret 2 instructions generated by lis/ori |
| 452 if (IsLis(instr1) && IsOri(instr2)) { |
| 453 #if V8_TARGET_ARCH_PPC64 |
| 454 Instr instr4 = instr_at(pc + (3 * kInstrSize)); |
| 455 Instr instr5 = instr_at(pc + (4 * kInstrSize)); |
| 456 // Assemble the 64 bit value. |
| 457 uint64_t hi = (static_cast<uint32_t>((instr1 & kImm16Mask) << 16) | |
| 458 static_cast<uint32_t>(instr2 & kImm16Mask)); |
| 459 uint64_t lo = (static_cast<uint32_t>((instr4 & kImm16Mask) << 16) | |
| 460 static_cast<uint32_t>(instr5 & kImm16Mask)); |
| 461 return reinterpret_cast<Address>((hi << 32) | lo); |
| 462 #else |
| 463 // Assemble the 32 bit value. |
| 464 return reinterpret_cast<Address>(((instr1 & kImm16Mask) << 16) | |
| 465 (instr2 & kImm16Mask)); |
| 466 #endif |
| 467 } |
| 468 #if V8_OOL_CONSTANT_POOL |
| 469 return Memory::Address_at(target_constant_pool_address_at(pc, constant_pool)); |
| 470 #else |
| 471 DCHECK(false); |
| 472 return (Address)0; |
| 473 #endif |
| 474 } |
| 475 |
| 476 |
| 477 #if V8_OOL_CONSTANT_POOL |
| 478 bool Assembler::IsConstantPoolLoadStart(Address pc) { |
| 479 #if V8_TARGET_ARCH_PPC64 |
| 480 if (!IsLi(instr_at(pc))) return false; |
| 481 pc += kInstrSize; |
| 482 #endif |
| 483 return GetRA(instr_at(pc)).is(kConstantPoolRegister); |
| 484 } |
| 485 |
| 486 |
| 487 bool Assembler::IsConstantPoolLoadEnd(Address pc) { |
| 488 #if V8_TARGET_ARCH_PPC64 |
| 489 pc -= kInstrSize; |
| 490 #endif |
| 491 return IsConstantPoolLoadStart(pc); |
| 492 } |
| 493 |
| 494 |
| 495 int Assembler::GetConstantPoolOffset(Address pc) { |
| 496 DCHECK(IsConstantPoolLoadStart(pc)); |
| 497 Instr instr = instr_at(pc); |
| 498 int offset = SIGN_EXT_IMM16((instr & kImm16Mask)); |
| 499 return offset; |
| 500 } |
| 501 |
| 502 |
| 503 void Assembler::SetConstantPoolOffset(Address pc, int offset) { |
| 504 DCHECK(IsConstantPoolLoadStart(pc)); |
| 505 DCHECK(is_int16(offset)); |
| 506 Instr instr = instr_at(pc); |
| 507 instr &= ~kImm16Mask; |
| 508 instr |= (offset & kImm16Mask); |
| 509 instr_at_put(pc, instr); |
| 510 } |
| 511 |
| 512 |
| 513 Address Assembler::target_constant_pool_address_at( |
| 514 Address pc, ConstantPoolArray* constant_pool) { |
| 515 Address addr = reinterpret_cast<Address>(constant_pool); |
| 516 DCHECK(addr); |
| 517 addr += GetConstantPoolOffset(pc); |
| 518 return addr; |
| 519 } |
| 520 #endif |
| 521 |
| 522 |
| 523 // This sets the branch destination (which gets loaded at the call address). |
| 524 // This is for calls and branches within generated code. The serializer |
| 525 // has already deserialized the mov instructions etc. |
| 526 // There is a FIXED_SEQUENCE assumption here |
| 527 void Assembler::deserialization_set_special_target_at( |
| 528 Address instruction_payload, Code* code, Address target) { |
| 529 set_target_address_at(instruction_payload, code, target); |
| 530 } |
| 531 |
| 532 // This code assumes the FIXED_SEQUENCE of lis/ori |
| 533 void Assembler::set_target_address_at(Address pc, |
| 534 ConstantPoolArray* constant_pool, |
| 535 Address target, |
| 536 ICacheFlushMode icache_flush_mode) { |
| 537 Instr instr1 = instr_at(pc); |
| 538 Instr instr2 = instr_at(pc + kInstrSize); |
| 539 // Interpret 2 instructions generated by lis/ori |
| 540 if (IsLis(instr1) && IsOri(instr2)) { |
| 541 #if V8_TARGET_ARCH_PPC64 |
| 542 Instr instr4 = instr_at(pc + (3 * kInstrSize)); |
| 543 Instr instr5 = instr_at(pc + (4 * kInstrSize)); |
| 544 // Needs to be fixed up when mov changes to handle 64-bit values. |
| 545 uint32_t* p = reinterpret_cast<uint32_t*>(pc); |
| 546 uintptr_t itarget = reinterpret_cast<uintptr_t>(target); |
| 547 |
| 548 instr5 &= ~kImm16Mask; |
| 549 instr5 |= itarget & kImm16Mask; |
| 550 itarget = itarget >> 16; |
| 551 |
| 552 instr4 &= ~kImm16Mask; |
| 553 instr4 |= itarget & kImm16Mask; |
| 554 itarget = itarget >> 16; |
| 555 |
| 556 instr2 &= ~kImm16Mask; |
| 557 instr2 |= itarget & kImm16Mask; |
| 558 itarget = itarget >> 16; |
| 559 |
| 560 instr1 &= ~kImm16Mask; |
| 561 instr1 |= itarget & kImm16Mask; |
| 562 itarget = itarget >> 16; |
| 563 |
| 564 *p = instr1; |
| 565 *(p + 1) = instr2; |
| 566 *(p + 3) = instr4; |
| 567 *(p + 4) = instr5; |
| 568 if (icache_flush_mode != SKIP_ICACHE_FLUSH) { |
| 569 CpuFeatures::FlushICache(p, 5 * kInstrSize); |
| 570 } |
| 571 #else |
| 572 uint32_t* p = reinterpret_cast<uint32_t*>(pc); |
| 573 uint32_t itarget = reinterpret_cast<uint32_t>(target); |
| 574 int lo_word = itarget & kImm16Mask; |
| 575 int hi_word = itarget >> 16; |
| 576 instr1 &= ~kImm16Mask; |
| 577 instr1 |= hi_word; |
| 578 instr2 &= ~kImm16Mask; |
| 579 instr2 |= lo_word; |
| 580 |
| 581 *p = instr1; |
| 582 *(p + 1) = instr2; |
| 583 if (icache_flush_mode != SKIP_ICACHE_FLUSH) { |
| 584 CpuFeatures::FlushICache(p, 2 * kInstrSize); |
| 585 } |
| 586 #endif |
| 587 } else { |
| 588 #if V8_OOL_CONSTANT_POOL |
| 589 Memory::Address_at(target_constant_pool_address_at(pc, constant_pool)) = |
| 590 target; |
| 591 #else |
| 592 UNREACHABLE(); |
| 593 #endif |
| 594 } |
| 595 } |
| 596 } |
| 597 } // namespace v8::internal |
| 598 |
| 599 #endif // V8_PPC_ASSEMBLER_PPC_INL_H_ |
OLD | NEW |