OLD | NEW |
1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2011, 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" | 5 #include "vm/globals.h" |
6 #if defined(TARGET_ARCH_X64) | 6 #if defined(TARGET_ARCH_X64) |
7 | 7 |
8 #include "vm/debugger.h" | 8 #include "vm/debugger.h" |
9 | 9 |
| 10 #include "vm/cpu.h" |
| 11 #include "vm/stub_code.h" |
| 12 |
10 namespace dart { | 13 namespace dart { |
11 | 14 |
12 RawInstance* ActivationFrame::GetLocalVarValue(intptr_t slot_index) { | 15 RawInstance* ActivationFrame::GetLocalVarValue(intptr_t slot_index) { |
13 UNIMPLEMENTED(); | 16 UNIMPLEMENTED(); |
14 return NULL; | 17 return NULL; |
15 } | 18 } |
16 | 19 |
| 20 |
| 21 RawInstance* ActivationFrame::GetInstanceCallReceiver( |
| 22 intptr_t num_actual_args) { |
| 23 ASSERT(num_actual_args > 0); // At minimum we have a receiver on the stack. |
| 24 // Stack pointer points to last argument that was pushed on the stack. |
| 25 uword receiver_addr = sp() + ((num_actual_args - 1) * kWordSize); |
| 26 return reinterpret_cast<RawInstance*>( |
| 27 *reinterpret_cast<uword*>(receiver_addr)); |
| 28 } |
| 29 |
| 30 |
| 31 void Breakpoint::PatchFunctionReturn() { |
| 32 uint8_t* code = reinterpret_cast<uint8_t*>(pc_ - 13); |
| 33 // movq %rbp,%rsp |
| 34 ASSERT((code[0] == 0x48) && (code[1] == 0x8b) && (code[2] == 0xe5)); |
| 35 ASSERT(code[3] == 0x5d); // popq %rbp |
| 36 ASSERT(code[4] == 0xc3); // ret |
| 37 // Next 8 bytes are nop instructions |
| 38 ASSERT((code[5] == 0x90) && (code[6] == 0x90) && |
| 39 (code[7] == 0x90) && (code[8] == 0x90) && |
| 40 (code[9] == 0x90) && (code[10] == 0x90) && |
| 41 (code[11] == 0x90) && (code[12] == 0x90)); |
| 42 // Smash code with call instruction and relative target address. |
| 43 uword stub_addr = StubCode::BreakpointReturnEntryPoint(); |
| 44 code[0] = 0x49; |
| 45 code[1] = 0xbb; |
| 46 *reinterpret_cast<uword*>(&code[2]) = stub_addr; |
| 47 code[10] = 0x41; |
| 48 code[11] = 0xff; |
| 49 code[12] = 0xd3; |
| 50 CPU::FlushICache(pc_, 5); |
| 51 } |
| 52 |
| 53 |
| 54 void Breakpoint::RestoreFunctionReturn() { |
| 55 uint8_t* code = reinterpret_cast<uint8_t*>(pc_ - 13); |
| 56 ASSERT((code[0] == 0x49) && (code[1] == 0xbb)); |
| 57 code[0] = 0x48; // movq %rbp,%rsp |
| 58 code[1] = 0x8b; |
| 59 code[2] = 0xe5; |
| 60 code[3] = 0x5d; // popq %rbp |
| 61 code[4] = 0xc3; // ret |
| 62 code[5] = 0x90; // nop |
| 63 code[6] = 0x90; // nop |
| 64 code[7] = 0x90; // nop |
| 65 code[8] = 0x90; // nop |
| 66 code[9] = 0x90; // nop |
| 67 code[10] = 0x90; // nop |
| 68 code[11] = 0x90; // nop |
| 69 code[12] = 0x90; // nop |
| 70 CPU::FlushICache(pc_, 5); |
| 71 } |
| 72 |
17 } // namespace dart | 73 } // namespace dart |
18 | 74 |
19 #endif // defined TARGET_ARCH_X64 | 75 #endif // defined TARGET_ARCH_X64 |
OLD | NEW |