OLD | NEW |
1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/v8.h" | 5 #include "src/v8.h" |
6 | 6 |
7 #if V8_TARGET_ARCH_PPC | 7 #if V8_TARGET_ARCH_PPC |
8 | 8 |
9 #include "src/codegen.h" | 9 #include "src/codegen.h" |
10 #include "src/debug.h" | 10 #include "src/debug.h" |
11 | 11 |
12 namespace v8 { | 12 namespace v8 { |
13 namespace internal { | 13 namespace internal { |
14 | 14 |
15 bool BreakLocationIterator::IsDebugBreakAtReturn() { | 15 void BreakLocation::SetDebugBreakAtReturn() { |
16 return Debug::IsDebugBreakAtReturn(rinfo()); | |
17 } | |
18 | |
19 | |
20 void BreakLocationIterator::SetDebugBreakAtReturn() { | |
21 // Patch the code changing the return from JS function sequence from | 16 // Patch the code changing the return from JS function sequence from |
22 // | 17 // |
23 // LeaveFrame | 18 // LeaveFrame |
24 // blr | 19 // blr |
25 // | 20 // |
26 // to a call to the debug break return code. | 21 // to a call to the debug break return code. |
27 // this uses a FIXED_SEQUENCE to load an address constant | 22 // this uses a FIXED_SEQUENCE to load an address constant |
28 // | 23 // |
29 // mov r0, <address> | 24 // mov r0, <address> |
30 // mtlr r0 | 25 // mtlr r0 |
31 // blrl | 26 // blrl |
32 // bkpt | 27 // bkpt |
33 // | 28 // |
34 CodePatcher patcher(rinfo()->pc(), Assembler::kJSReturnSequenceInstructions); | 29 CodePatcher patcher(pc(), Assembler::kJSReturnSequenceInstructions); |
35 Assembler::BlockTrampolinePoolScope block_trampoline_pool(patcher.masm()); | 30 Assembler::BlockTrampolinePoolScope block_trampoline_pool(patcher.masm()); |
36 patcher.masm()->mov( | 31 patcher.masm()->mov( |
37 v8::internal::r0, | 32 v8::internal::r0, |
38 Operand(reinterpret_cast<intptr_t>(debug_info_->GetIsolate() | 33 Operand(reinterpret_cast<intptr_t>(debug_info_->GetIsolate() |
39 ->builtins() | 34 ->builtins() |
40 ->Return_DebugBreak() | 35 ->Return_DebugBreak() |
41 ->entry()))); | 36 ->entry()))); |
42 patcher.masm()->mtctr(v8::internal::r0); | 37 patcher.masm()->mtctr(v8::internal::r0); |
43 patcher.masm()->bctrl(); | 38 patcher.masm()->bctrl(); |
44 patcher.masm()->bkpt(0); | 39 patcher.masm()->bkpt(0); |
45 } | 40 } |
46 | 41 |
47 | 42 |
48 // Restore the JS frame exit code. | 43 void BreakLocation::SetDebugBreakAtSlot() { |
49 void BreakLocationIterator::ClearDebugBreakAtReturn() { | |
50 rinfo()->PatchCode(original_rinfo()->pc(), | |
51 Assembler::kJSReturnSequenceInstructions); | |
52 } | |
53 | |
54 | |
55 // A debug break in the frame exit code is identified by the JS frame exit code | |
56 // having been patched with a call instruction. | |
57 bool Debug::IsDebugBreakAtReturn(RelocInfo* rinfo) { | |
58 DCHECK(RelocInfo::IsJSReturn(rinfo->rmode())); | |
59 return rinfo->IsPatchedReturnSequence(); | |
60 } | |
61 | |
62 | |
63 bool BreakLocationIterator::IsDebugBreakAtSlot() { | |
64 DCHECK(IsDebugBreakSlot()); | |
65 // Check whether the debug break slot instructions have been patched. | |
66 return rinfo()->IsPatchedDebugBreakSlotSequence(); | |
67 } | |
68 | |
69 | |
70 void BreakLocationIterator::SetDebugBreakAtSlot() { | |
71 DCHECK(IsDebugBreakSlot()); | 44 DCHECK(IsDebugBreakSlot()); |
72 // Patch the code changing the debug break slot code from | 45 // Patch the code changing the debug break slot code from |
73 // | 46 // |
74 // ori r3, r3, 0 | 47 // ori r3, r3, 0 |
75 // ori r3, r3, 0 | 48 // ori r3, r3, 0 |
76 // ori r3, r3, 0 | 49 // ori r3, r3, 0 |
77 // ori r3, r3, 0 | 50 // ori r3, r3, 0 |
78 // ori r3, r3, 0 | 51 // ori r3, r3, 0 |
79 // | 52 // |
80 // to a call to the debug break code, using a FIXED_SEQUENCE. | 53 // to a call to the debug break code, using a FIXED_SEQUENCE. |
81 // | 54 // |
82 // mov r0, <address> | 55 // mov r0, <address> |
83 // mtlr r0 | 56 // mtlr r0 |
84 // blrl | 57 // blrl |
85 // | 58 // |
86 CodePatcher patcher(rinfo()->pc(), Assembler::kDebugBreakSlotInstructions); | 59 CodePatcher patcher(pc(), Assembler::kDebugBreakSlotInstructions); |
87 Assembler::BlockTrampolinePoolScope block_trampoline_pool(patcher.masm()); | 60 Assembler::BlockTrampolinePoolScope block_trampoline_pool(patcher.masm()); |
88 patcher.masm()->mov( | 61 patcher.masm()->mov( |
89 v8::internal::r0, | 62 v8::internal::r0, |
90 Operand(reinterpret_cast<intptr_t>( | 63 Operand(reinterpret_cast<intptr_t>( |
91 debug_info_->GetIsolate()->builtins()->Slot_DebugBreak()->entry()))); | 64 debug_info_->GetIsolate()->builtins()->Slot_DebugBreak()->entry()))); |
92 patcher.masm()->mtctr(v8::internal::r0); | 65 patcher.masm()->mtctr(v8::internal::r0); |
93 patcher.masm()->bctrl(); | 66 patcher.masm()->bctrl(); |
94 } | 67 } |
95 | 68 |
96 | 69 |
97 void BreakLocationIterator::ClearDebugBreakAtSlot() { | |
98 DCHECK(IsDebugBreakSlot()); | |
99 rinfo()->PatchCode(original_rinfo()->pc(), | |
100 Assembler::kDebugBreakSlotInstructions); | |
101 } | |
102 | |
103 | |
104 #define __ ACCESS_MASM(masm) | 70 #define __ ACCESS_MASM(masm) |
105 | 71 |
106 | 72 |
107 static void Generate_DebugBreakCallHelper(MacroAssembler* masm, | 73 static void Generate_DebugBreakCallHelper(MacroAssembler* masm, |
108 RegList object_regs, | 74 RegList object_regs, |
109 RegList non_object_regs) { | 75 RegList non_object_regs) { |
110 { | 76 { |
111 FrameScope scope(masm, StackFrame::INTERNAL); | 77 FrameScope scope(masm, StackFrame::INTERNAL); |
112 | 78 |
113 // Load padding words on stack. | 79 // Load padding words on stack. |
(...skipping 219 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
333 } | 299 } |
334 | 300 |
335 | 301 |
336 const bool LiveEdit::kFrameDropperSupported = true; | 302 const bool LiveEdit::kFrameDropperSupported = true; |
337 | 303 |
338 #undef __ | 304 #undef __ |
339 } | 305 } |
340 } // namespace v8::internal | 306 } // namespace v8::internal |
341 | 307 |
342 #endif // V8_TARGET_ARCH_PPC | 308 #endif // V8_TARGET_ARCH_PPC |
OLD | NEW |