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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #include "vm/globals.h" // Needed here to get TARGET_ARCH_X64. | 5 #include "vm/globals.h" // Needed here to get TARGET_ARCH_X64. |
6 #if defined(TARGET_ARCH_X64) | 6 #if defined(TARGET_ARCH_X64) |
7 | 7 |
8 #include "vm/cpu.h" | 8 #include "vm/cpu.h" |
| 9 #include "vm/constants_x64.h" |
9 #include "vm/instructions.h" | 10 #include "vm/instructions.h" |
10 #include "vm/object.h" | 11 #include "vm/object.h" |
11 | 12 |
12 namespace dart { | 13 namespace dart { |
13 | 14 |
14 void ShortCallPattern::SetTargetAddress(uword target) const { | 15 void ShortCallPattern::SetTargetAddress(uword target) const { |
15 ASSERT(IsValid()); | 16 ASSERT(IsValid()); |
16 *reinterpret_cast<uint32_t*>(start() + 1) = target - start() - kLengthInBytes; | 17 *reinterpret_cast<uint32_t*>(start() + 1) = target - start() - kLengthInBytes; |
17 CPU::FlushICache(start() + 1, kWordSize); | 18 CPU::FlushICache(start() + 1, kWordSize); |
18 } | 19 } |
19 | 20 |
20 | 21 |
| 22 bool DecodeLoadObjectFromPoolOrThread(uword pc, |
| 23 const Code& code, |
| 24 Object* obj) { |
| 25 ASSERT(code.ContainsInstructionAt(pc)); |
| 26 |
| 27 uint8_t* bytes = reinterpret_cast<uint8_t*>(pc); |
| 28 COMPILE_ASSERT(PP == R15); |
| 29 if (((bytes[0] == 0x49) && (bytes[1] == 0x8b) && (bytes[2] == 0x9f)) || |
| 30 ((bytes[0] == 0x49) && (bytes[1] == 0x8b) && (bytes[2] == 0x87)) || |
| 31 ((bytes[0] == 0x4d) && (bytes[1] == 0x8b) && (bytes[2] == 0xa7)) || |
| 32 ((bytes[0] == 0x4d) && (bytes[1] == 0x8b) && (bytes[2] == 0x9f)) || |
| 33 ((bytes[0] == 0x4d) && (bytes[1] == 0x8b) && (bytes[2] == 0x97))) { |
| 34 intptr_t index = IndexFromPPLoad(pc + 3); |
| 35 const ObjectPool& pool = ObjectPool::Handle(code.object_pool()); |
| 36 if (pool.InfoAt(index) == ObjectPool::kTaggedObject) { |
| 37 *obj = pool.ObjectAt(index); |
| 38 return true; |
| 39 } |
| 40 } |
| 41 COMPILE_ASSERT(THR == R14); |
| 42 if (((bytes[0] == 0x49) && (bytes[1] == 0x8b) && (bytes[2] == 0x86)) || |
| 43 ((bytes[0] == 0x49) && (bytes[1] == 0x8b) && (bytes[2] == 0xb6)) || |
| 44 ((bytes[0] == 0x49) && (bytes[1] == 0x8b) && (bytes[2] == 0x96)) || |
| 45 ((bytes[0] == 0x49) && (bytes[1] == 0x8b) && (bytes[2] == 0x9e)) || |
| 46 ((bytes[0] == 0x4d) && (bytes[1] == 0x8b) && (bytes[2] == 0x9e)) || |
| 47 ((bytes[0] == 0x4d) && (bytes[1] == 0x8b) && (bytes[2] == 0xa6))) { |
| 48 int32_t offset = *reinterpret_cast<int32_t*>(pc + 3); |
| 49 return Thread::ObjectAtOffset(offset, obj); |
| 50 } |
| 51 if (((bytes[0] == 0x4d) && (bytes[1] == 0x8b) && (bytes[2] == 0x5e)) || |
| 52 ((bytes[0] == 0x4d) && (bytes[1] == 0x8b) && (bytes[2] == 0x6e))) { |
| 53 uint8_t offset = *reinterpret_cast<uint8_t*>(pc + 3); |
| 54 return Thread::ObjectAtOffset(offset, obj); |
| 55 } |
| 56 |
| 57 return false; |
| 58 } |
| 59 |
21 } // namespace dart | 60 } // namespace dart |
22 | 61 |
23 #endif // defined TARGET_ARCH_X64 | 62 #endif // defined TARGET_ARCH_X64 |
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