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| 1 // Copyright (c) 1994-2006 Sun Microsystems Inc. | 1 // Copyright (c) 1994-2006 Sun Microsystems Inc. |
| 2 // All Rights Reserved. | 2 // All Rights Reserved. |
| 3 // | 3 // |
| 4 // Redistribution and use in source and binary forms, with or without | 4 // Redistribution and use in source and binary forms, with or without |
| 5 // modification, are permitted provided that the following conditions | 5 // modification, are permitted provided that the following conditions |
| 6 // are met: | 6 // are met: |
| 7 // | 7 // |
| 8 // - Redistributions of source code must retain the above copyright notice, | 8 // - Redistributions of source code must retain the above copyright notice, |
| 9 // this list of conditions and the following disclaimer. | 9 // this list of conditions and the following disclaimer. |
| 10 // | 10 // |
| (...skipping 83 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
| 94 int32_t* p = reinterpret_cast<int32_t*>(pc_); | 94 int32_t* p = reinterpret_cast<int32_t*>(pc_); |
| 95 *p += delta; // relocate entry | 95 *p += delta; // relocate entry |
| 96 } | 96 } |
| 97 // We do not use pc relative addressing on ARM, so there is | 97 // We do not use pc relative addressing on ARM, so there is |
| 98 // nothing else to do. | 98 // nothing else to do. |
| 99 } | 99 } |
| 100 | 100 |
| 101 | 101 |
| 102 Address RelocInfo::target_address() { | 102 Address RelocInfo::target_address() { |
| 103 ASSERT(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)); | 103 ASSERT(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)); |
| 104 return Assembler::target_address_at(pc_, host_); | 104 return Assembler::target_address_at(pc_); |
| 105 } | 105 } |
| 106 | 106 |
| 107 | 107 |
| 108 Address RelocInfo::target_address_address() { | 108 Address RelocInfo::target_address_address() { |
| 109 ASSERT(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_) | 109 ASSERT(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_) |
| 110 || rmode_ == EMBEDDED_OBJECT | 110 || rmode_ == EMBEDDED_OBJECT |
| 111 || rmode_ == EXTERNAL_REFERENCE); | 111 || rmode_ == EXTERNAL_REFERENCE); |
| 112 return Assembler::target_pointer_address_at(pc_); | 112 return Assembler::target_pointer_address_at(pc_); |
| 113 } | 113 } |
| 114 | 114 |
| 115 | 115 |
| 116 Address RelocInfo::constant_pool_entry_address() { | 116 Address RelocInfo::constant_pool_entry_address() { |
| 117 ASSERT(IsInConstantPool()); | 117 ASSERT(IsInConstantPool()); |
| 118 ASSERT(Assembler::IsLdrPcImmediateOffset(Memory::int32_at(pc_))); | 118 ASSERT(Assembler::IsLdrPcImmediateOffset(Memory::int32_at(pc_))); |
| 119 return Assembler::target_pointer_address_at(pc_); | 119 return Assembler::target_pointer_address_at(pc_); |
| 120 } | 120 } |
| 121 | 121 |
| 122 | 122 |
| 123 int RelocInfo::target_address_size() { | 123 int RelocInfo::target_address_size() { |
| 124 return kPointerSize; | 124 return kPointerSize; |
| 125 } | 125 } |
| 126 | 126 |
| 127 | 127 |
| 128 void RelocInfo::set_target_address(Address target, WriteBarrierMode mode) { | 128 void RelocInfo::set_target_address(Address target, WriteBarrierMode mode) { |
| 129 ASSERT(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)); | 129 ASSERT(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)); |
| 130 Assembler::set_target_address_at(pc_, host_, target); | 130 Assembler::set_target_address_at(pc_, target); |
| 131 if (mode == UPDATE_WRITE_BARRIER && host() != NULL && IsCodeTarget(rmode_)) { | 131 if (mode == UPDATE_WRITE_BARRIER && host() != NULL && IsCodeTarget(rmode_)) { |
| 132 Object* target_code = Code::GetCodeFromTargetAddress(target); | 132 Object* target_code = Code::GetCodeFromTargetAddress(target); |
| 133 host()->GetHeap()->incremental_marking()->RecordWriteIntoCode( | 133 host()->GetHeap()->incremental_marking()->RecordWriteIntoCode( |
| 134 host(), this, HeapObject::cast(target_code)); | 134 host(), this, HeapObject::cast(target_code)); |
| 135 } | 135 } |
| 136 } | 136 } |
| 137 | 137 |
| 138 | 138 |
| 139 Object* RelocInfo::target_object() { | 139 Object* RelocInfo::target_object() { |
| 140 ASSERT(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); | 140 ASSERT(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
| 141 return reinterpret_cast<Object*>(Assembler::target_address_at(pc_, host_)); | 141 return reinterpret_cast<Object*>(Assembler::target_address_at(pc_)); |
| 142 } | 142 } |
| 143 | 143 |
| 144 | 144 |
| 145 Handle<Object> RelocInfo::target_object_handle(Assembler* origin) { | 145 Handle<Object> RelocInfo::target_object_handle(Assembler* origin) { |
| 146 ASSERT(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); | 146 ASSERT(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
| 147 return Handle<Object>(reinterpret_cast<Object**>( | 147 return Handle<Object>(reinterpret_cast<Object**>( |
| 148 Assembler::target_address_at(pc_, host_))); | 148 Assembler::target_address_at(pc_))); |
| 149 } | 149 } |
| 150 | 150 |
| 151 | 151 |
| 152 void RelocInfo::set_target_object(Object* target, WriteBarrierMode mode) { | 152 void RelocInfo::set_target_object(Object* target, WriteBarrierMode mode) { |
| 153 ASSERT(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); | 153 ASSERT(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
| 154 ASSERT(!target->IsConsString()); | 154 ASSERT(!target->IsConsString()); |
| 155 Assembler::set_target_address_at(pc_, host_, | 155 Assembler::set_target_address_at(pc_, reinterpret_cast<Address>(target)); |
| 156 reinterpret_cast<Address>(target)); | |
| 157 if (mode == UPDATE_WRITE_BARRIER && | 156 if (mode == UPDATE_WRITE_BARRIER && |
| 158 host() != NULL && | 157 host() != NULL && |
| 159 target->IsHeapObject()) { | 158 target->IsHeapObject()) { |
| 160 host()->GetHeap()->incremental_marking()->RecordWrite( | 159 host()->GetHeap()->incremental_marking()->RecordWrite( |
| 161 host(), &Memory::Object_at(pc_), HeapObject::cast(target)); | 160 host(), &Memory::Object_at(pc_), HeapObject::cast(target)); |
| 162 } | 161 } |
| 163 } | 162 } |
| 164 | 163 |
| 165 | 164 |
| 166 Address RelocInfo::target_reference() { | 165 Address RelocInfo::target_reference() { |
| 167 ASSERT(rmode_ == EXTERNAL_REFERENCE); | 166 ASSERT(rmode_ == EXTERNAL_REFERENCE); |
| 168 return Assembler::target_address_at(pc_, host_); | 167 return Assembler::target_address_at(pc_); |
| 169 } | 168 } |
| 170 | 169 |
| 171 | 170 |
| 172 Address RelocInfo::target_runtime_entry(Assembler* origin) { | 171 Address RelocInfo::target_runtime_entry(Assembler* origin) { |
| 173 ASSERT(IsRuntimeEntry(rmode_)); | 172 ASSERT(IsRuntimeEntry(rmode_)); |
| 174 return target_address(); | 173 return target_address(); |
| 175 } | 174 } |
| 176 | 175 |
| 177 | 176 |
| 178 void RelocInfo::set_target_runtime_entry(Address target, | 177 void RelocInfo::set_target_runtime_entry(Address target, |
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| 269 (IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence())); | 268 (IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence())); |
| 270 return reinterpret_cast<Object**>(pc_ + 2 * Assembler::kInstrSize); | 269 return reinterpret_cast<Object**>(pc_ + 2 * Assembler::kInstrSize); |
| 271 } | 270 } |
| 272 | 271 |
| 273 | 272 |
| 274 void RelocInfo::WipeOut() { | 273 void RelocInfo::WipeOut() { |
| 275 ASSERT(IsEmbeddedObject(rmode_) || | 274 ASSERT(IsEmbeddedObject(rmode_) || |
| 276 IsCodeTarget(rmode_) || | 275 IsCodeTarget(rmode_) || |
| 277 IsRuntimeEntry(rmode_) || | 276 IsRuntimeEntry(rmode_) || |
| 278 IsExternalReference(rmode_)); | 277 IsExternalReference(rmode_)); |
| 279 Assembler::set_target_address_at(pc_, host_, NULL); | 278 Assembler::set_target_address_at(pc_, NULL); |
| 280 } | 279 } |
| 281 | 280 |
| 282 | 281 |
| 283 bool RelocInfo::IsPatchedReturnSequence() { | 282 bool RelocInfo::IsPatchedReturnSequence() { |
| 284 Instr current_instr = Assembler::instr_at(pc_); | 283 Instr current_instr = Assembler::instr_at(pc_); |
| 285 Instr next_instr = Assembler::instr_at(pc_ + Assembler::kInstrSize); | 284 Instr next_instr = Assembler::instr_at(pc_ + Assembler::kInstrSize); |
| 286 // A patched return sequence is: | 285 // A patched return sequence is: |
| 287 // ldr ip, [pc, #0] | 286 // ldr ip, [pc, #0] |
| 288 // blx ip | 287 // blx ip |
| 289 return ((current_instr & kLdrPCMask) == kLdrPCPattern) | 288 return ((current_instr & kLdrPCMask) == kLdrPCPattern) |
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| 403 pc_ += kInstrSize; | 402 pc_ += kInstrSize; |
| 404 } | 403 } |
| 405 | 404 |
| 406 | 405 |
| 407 Address Assembler::target_pointer_address_at(Address pc) { | 406 Address Assembler::target_pointer_address_at(Address pc) { |
| 408 Instr instr = Memory::int32_at(pc); | 407 Instr instr = Memory::int32_at(pc); |
| 409 return pc + GetLdrRegisterImmediateOffset(instr) + kPcLoadDelta; | 408 return pc + GetLdrRegisterImmediateOffset(instr) + kPcLoadDelta; |
| 410 } | 409 } |
| 411 | 410 |
| 412 | 411 |
| 413 Address Assembler::target_address_at(Address pc, | 412 Address Assembler::target_address_at(Address pc) { |
| 414 ConstantPoolArray* constant_pool) { | |
| 415 if (IsMovW(Memory::int32_at(pc))) { | 413 if (IsMovW(Memory::int32_at(pc))) { |
| 416 ASSERT(IsMovT(Memory::int32_at(pc + kInstrSize))); | 414 ASSERT(IsMovT(Memory::int32_at(pc + kInstrSize))); |
| 417 Instruction* instr = Instruction::At(pc); | 415 Instruction* instr = Instruction::At(pc); |
| 418 Instruction* next_instr = Instruction::At(pc + kInstrSize); | 416 Instruction* next_instr = Instruction::At(pc + kInstrSize); |
| 419 return reinterpret_cast<Address>( | 417 return reinterpret_cast<Address>( |
| 420 (next_instr->ImmedMovwMovtValue() << 16) | | 418 (next_instr->ImmedMovwMovtValue() << 16) | |
| 421 instr->ImmedMovwMovtValue()); | 419 instr->ImmedMovwMovtValue()); |
| 422 } | 420 } |
| 423 ASSERT(IsLdrPcImmediateOffset(Memory::int32_at(pc))); | 421 ASSERT(IsLdrPcImmediateOffset(Memory::int32_at(pc))); |
| 424 return Memory::Address_at(target_pointer_address_at(pc)); | 422 return Memory::Address_at(target_pointer_address_at(pc)); |
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| 454 return pc + kInstrSize * 2; | 452 return pc + kInstrSize * 2; |
| 455 } else { | 453 } else { |
| 456 ASSERT(IsMovW(Memory::int32_at(pc))); | 454 ASSERT(IsMovW(Memory::int32_at(pc))); |
| 457 ASSERT(IsMovT(Memory::int32_at(pc + kInstrSize))); | 455 ASSERT(IsMovT(Memory::int32_at(pc + kInstrSize))); |
| 458 return pc + kInstrSize * 3; | 456 return pc + kInstrSize * 3; |
| 459 } | 457 } |
| 460 } | 458 } |
| 461 | 459 |
| 462 | 460 |
| 463 void Assembler::deserialization_set_special_target_at( | 461 void Assembler::deserialization_set_special_target_at( |
| 464 Address constant_pool_entry, Code* code, Address target) { | 462 Address constant_pool_entry, Address target) { |
| 465 Memory::Address_at(constant_pool_entry) = target; | 463 Memory::Address_at(constant_pool_entry) = target; |
| 466 } | 464 } |
| 467 | 465 |
| 468 | 466 |
| 469 static Instr EncodeMovwImmediate(uint32_t immediate) { | 467 static Instr EncodeMovwImmediate(uint32_t immediate) { |
| 470 ASSERT(immediate < 0x10000); | 468 ASSERT(immediate < 0x10000); |
| 471 return ((immediate & 0xf000) << 4) | (immediate & 0xfff); | 469 return ((immediate & 0xf000) << 4) | (immediate & 0xfff); |
| 472 } | 470 } |
| 473 | 471 |
| 474 | 472 |
| 475 void Assembler::set_target_address_at(Address pc, | 473 void Assembler::set_target_address_at(Address pc, Address target) { |
| 476 ConstantPoolArray* constant_pool, | |
| 477 Address target) { | |
| 478 if (IsMovW(Memory::int32_at(pc))) { | 474 if (IsMovW(Memory::int32_at(pc))) { |
| 479 ASSERT(IsMovT(Memory::int32_at(pc + kInstrSize))); | 475 ASSERT(IsMovT(Memory::int32_at(pc + kInstrSize))); |
| 480 uint32_t* instr_ptr = reinterpret_cast<uint32_t*>(pc); | 476 uint32_t* instr_ptr = reinterpret_cast<uint32_t*>(pc); |
| 481 uint32_t immediate = reinterpret_cast<uint32_t>(target); | 477 uint32_t immediate = reinterpret_cast<uint32_t>(target); |
| 482 uint32_t intermediate = instr_ptr[0]; | 478 uint32_t intermediate = instr_ptr[0]; |
| 483 intermediate &= ~EncodeMovwImmediate(0xFFFF); | 479 intermediate &= ~EncodeMovwImmediate(0xFFFF); |
| 484 intermediate |= EncodeMovwImmediate(immediate & 0xFFFF); | 480 intermediate |= EncodeMovwImmediate(immediate & 0xFFFF); |
| 485 instr_ptr[0] = intermediate; | 481 instr_ptr[0] = intermediate; |
| 486 intermediate = instr_ptr[1]; | 482 intermediate = instr_ptr[1]; |
| 487 intermediate &= ~EncodeMovwImmediate(0xFFFF); | 483 intermediate &= ~EncodeMovwImmediate(0xFFFF); |
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| 501 // ldr ip, [pc, #...] | 497 // ldr ip, [pc, #...] |
| 502 // since the instruction accessing this address in the constant pool remains | 498 // since the instruction accessing this address in the constant pool remains |
| 503 // unchanged. | 499 // unchanged. |
| 504 } | 500 } |
| 505 } | 501 } |
| 506 | 502 |
| 507 | 503 |
| 508 } } // namespace v8::internal | 504 } } // namespace v8::internal |
| 509 | 505 |
| 510 #endif // V8_ARM_ASSEMBLER_ARM_INL_H_ | 506 #endif // V8_ARM_ASSEMBLER_ARM_INL_H_ |
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