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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 are | 5 // modification, are permitted provided that the following conditions are |
6 // met: | 6 // 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 // |
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32 // modified significantly by Google Inc. | 32 // modified significantly by Google Inc. |
33 // Copyright 2012 the V8 project authors. All rights reserved. | 33 // Copyright 2012 the V8 project authors. All rights reserved. |
34 | 34 |
35 // A light-weight IA32 Assembler. | 35 // A light-weight IA32 Assembler. |
36 | 36 |
37 #ifndef V8_IA32_ASSEMBLER_IA32_INL_H_ | 37 #ifndef V8_IA32_ASSEMBLER_IA32_INL_H_ |
38 #define V8_IA32_ASSEMBLER_IA32_INL_H_ | 38 #define V8_IA32_ASSEMBLER_IA32_INL_H_ |
39 | 39 |
40 #include "src/ia32/assembler-ia32.h" | 40 #include "src/ia32/assembler-ia32.h" |
41 | 41 |
42 #include "src/cpu.h" | 42 #include "src/assembler.h" |
43 #include "src/debug.h" | 43 #include "src/debug.h" |
44 | 44 |
45 namespace v8 { | 45 namespace v8 { |
46 namespace internal { | 46 namespace internal { |
47 | 47 |
48 bool CpuFeatures::SupportsCrankshaft() { return true; } | 48 bool CpuFeatures::SupportsCrankshaft() { return true; } |
49 | 49 |
50 | 50 |
51 static const byte kCallOpcode = 0xE8; | 51 static const byte kCallOpcode = 0xE8; |
52 static const int kNoCodeAgeSequenceLength = 5; | 52 static const int kNoCodeAgeSequenceLength = 5; |
53 | 53 |
54 | 54 |
55 // The modes possibly affected by apply must be in kApplyMask. | 55 // The modes possibly affected by apply must be in kApplyMask. |
56 void RelocInfo::apply(intptr_t delta, ICacheFlushMode icache_flush_mode) { | 56 void RelocInfo::apply(intptr_t delta, ICacheFlushMode icache_flush_mode) { |
57 bool flush_icache = icache_flush_mode != SKIP_ICACHE_FLUSH; | 57 bool flush_icache = icache_flush_mode != SKIP_ICACHE_FLUSH; |
58 if (IsRuntimeEntry(rmode_) || IsCodeTarget(rmode_)) { | 58 if (IsRuntimeEntry(rmode_) || IsCodeTarget(rmode_)) { |
59 int32_t* p = reinterpret_cast<int32_t*>(pc_); | 59 int32_t* p = reinterpret_cast<int32_t*>(pc_); |
60 *p -= delta; // Relocate entry. | 60 *p -= delta; // Relocate entry. |
61 if (flush_icache) CPU::FlushICache(p, sizeof(uint32_t)); | 61 if (flush_icache) CpuFeatures::FlushICache(p, sizeof(uint32_t)); |
62 } else if (rmode_ == CODE_AGE_SEQUENCE) { | 62 } else if (rmode_ == CODE_AGE_SEQUENCE) { |
63 if (*pc_ == kCallOpcode) { | 63 if (*pc_ == kCallOpcode) { |
64 int32_t* p = reinterpret_cast<int32_t*>(pc_ + 1); | 64 int32_t* p = reinterpret_cast<int32_t*>(pc_ + 1); |
65 *p -= delta; // Relocate entry. | 65 *p -= delta; // Relocate entry. |
66 if (flush_icache) CPU::FlushICache(p, sizeof(uint32_t)); | 66 if (flush_icache) CpuFeatures::FlushICache(p, sizeof(uint32_t)); |
67 } | 67 } |
68 } else if (rmode_ == JS_RETURN && IsPatchedReturnSequence()) { | 68 } else if (rmode_ == JS_RETURN && IsPatchedReturnSequence()) { |
69 // Special handling of js_return when a break point is set (call | 69 // Special handling of js_return when a break point is set (call |
70 // instruction has been inserted). | 70 // instruction has been inserted). |
71 int32_t* p = reinterpret_cast<int32_t*>(pc_ + 1); | 71 int32_t* p = reinterpret_cast<int32_t*>(pc_ + 1); |
72 *p -= delta; // Relocate entry. | 72 *p -= delta; // Relocate entry. |
73 if (flush_icache) CPU::FlushICache(p, sizeof(uint32_t)); | 73 if (flush_icache) CpuFeatures::FlushICache(p, sizeof(uint32_t)); |
74 } else if (rmode_ == DEBUG_BREAK_SLOT && IsPatchedDebugBreakSlotSequence()) { | 74 } else if (rmode_ == DEBUG_BREAK_SLOT && IsPatchedDebugBreakSlotSequence()) { |
75 // Special handling of a debug break slot when a break point is set (call | 75 // Special handling of a debug break slot when a break point is set (call |
76 // instruction has been inserted). | 76 // instruction has been inserted). |
77 int32_t* p = reinterpret_cast<int32_t*>(pc_ + 1); | 77 int32_t* p = reinterpret_cast<int32_t*>(pc_ + 1); |
78 *p -= delta; // Relocate entry. | 78 *p -= delta; // Relocate entry. |
79 if (flush_icache) CPU::FlushICache(p, sizeof(uint32_t)); | 79 if (flush_icache) CpuFeatures::FlushICache(p, sizeof(uint32_t)); |
80 } else if (IsInternalReference(rmode_)) { | 80 } else if (IsInternalReference(rmode_)) { |
81 // absolute code pointer inside code object moves with the code object. | 81 // absolute code pointer inside code object moves with the code object. |
82 int32_t* p = reinterpret_cast<int32_t*>(pc_); | 82 int32_t* p = reinterpret_cast<int32_t*>(pc_); |
83 *p += delta; // Relocate entry. | 83 *p += delta; // Relocate entry. |
84 if (flush_icache) CPU::FlushICache(p, sizeof(uint32_t)); | 84 if (flush_icache) CpuFeatures::FlushICache(p, sizeof(uint32_t)); |
85 } | 85 } |
86 } | 86 } |
87 | 87 |
88 | 88 |
89 Address RelocInfo::target_address() { | 89 Address RelocInfo::target_address() { |
90 ASSERT(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)); | 90 ASSERT(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)); |
91 return Assembler::target_address_at(pc_, host_); | 91 return Assembler::target_address_at(pc_, host_); |
92 } | 92 } |
93 | 93 |
94 | 94 |
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137 } | 137 } |
138 | 138 |
139 | 139 |
140 void RelocInfo::set_target_object(Object* target, | 140 void RelocInfo::set_target_object(Object* target, |
141 WriteBarrierMode write_barrier_mode, | 141 WriteBarrierMode write_barrier_mode, |
142 ICacheFlushMode icache_flush_mode) { | 142 ICacheFlushMode icache_flush_mode) { |
143 ASSERT(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); | 143 ASSERT(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
144 ASSERT(!target->IsConsString()); | 144 ASSERT(!target->IsConsString()); |
145 Memory::Object_at(pc_) = target; | 145 Memory::Object_at(pc_) = target; |
146 if (icache_flush_mode != SKIP_ICACHE_FLUSH) { | 146 if (icache_flush_mode != SKIP_ICACHE_FLUSH) { |
147 CPU::FlushICache(pc_, sizeof(Address)); | 147 CpuFeatures::FlushICache(pc_, sizeof(Address)); |
148 } | 148 } |
149 if (write_barrier_mode == UPDATE_WRITE_BARRIER && | 149 if (write_barrier_mode == UPDATE_WRITE_BARRIER && |
150 host() != NULL && | 150 host() != NULL && |
151 target->IsHeapObject()) { | 151 target->IsHeapObject()) { |
152 host()->GetHeap()->incremental_marking()->RecordWrite( | 152 host()->GetHeap()->incremental_marking()->RecordWrite( |
153 host(), &Memory::Object_at(pc_), HeapObject::cast(target)); | 153 host(), &Memory::Object_at(pc_), HeapObject::cast(target)); |
154 } | 154 } |
155 } | 155 } |
156 | 156 |
157 | 157 |
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190 } | 190 } |
191 | 191 |
192 | 192 |
193 void RelocInfo::set_target_cell(Cell* cell, | 193 void RelocInfo::set_target_cell(Cell* cell, |
194 WriteBarrierMode write_barrier_mode, | 194 WriteBarrierMode write_barrier_mode, |
195 ICacheFlushMode icache_flush_mode) { | 195 ICacheFlushMode icache_flush_mode) { |
196 ASSERT(rmode_ == RelocInfo::CELL); | 196 ASSERT(rmode_ == RelocInfo::CELL); |
197 Address address = cell->address() + Cell::kValueOffset; | 197 Address address = cell->address() + Cell::kValueOffset; |
198 Memory::Address_at(pc_) = address; | 198 Memory::Address_at(pc_) = address; |
199 if (icache_flush_mode != SKIP_ICACHE_FLUSH) { | 199 if (icache_flush_mode != SKIP_ICACHE_FLUSH) { |
200 CPU::FlushICache(pc_, sizeof(Address)); | 200 CpuFeatures::FlushICache(pc_, sizeof(Address)); |
201 } | 201 } |
202 if (write_barrier_mode == UPDATE_WRITE_BARRIER && host() != NULL) { | 202 if (write_barrier_mode == UPDATE_WRITE_BARRIER && host() != NULL) { |
203 // TODO(1550) We are passing NULL as a slot because cell can never be on | 203 // TODO(1550) We are passing NULL as a slot because cell can never be on |
204 // evacuation candidate. | 204 // evacuation candidate. |
205 host()->GetHeap()->incremental_marking()->RecordWrite( | 205 host()->GetHeap()->incremental_marking()->RecordWrite( |
206 host(), NULL, cell); | 206 host(), NULL, cell); |
207 } | 207 } |
208 } | 208 } |
209 | 209 |
210 | 210 |
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287 | 287 |
288 bool RelocInfo::IsPatchedDebugBreakSlotSequence() { | 288 bool RelocInfo::IsPatchedDebugBreakSlotSequence() { |
289 return !Assembler::IsNop(pc()); | 289 return !Assembler::IsNop(pc()); |
290 } | 290 } |
291 | 291 |
292 | 292 |
293 void RelocInfo::Visit(Isolate* isolate, ObjectVisitor* visitor) { | 293 void RelocInfo::Visit(Isolate* isolate, ObjectVisitor* visitor) { |
294 RelocInfo::Mode mode = rmode(); | 294 RelocInfo::Mode mode = rmode(); |
295 if (mode == RelocInfo::EMBEDDED_OBJECT) { | 295 if (mode == RelocInfo::EMBEDDED_OBJECT) { |
296 visitor->VisitEmbeddedPointer(this); | 296 visitor->VisitEmbeddedPointer(this); |
297 CPU::FlushICache(pc_, sizeof(Address)); | 297 CpuFeatures::FlushICache(pc_, sizeof(Address)); |
298 } else if (RelocInfo::IsCodeTarget(mode)) { | 298 } else if (RelocInfo::IsCodeTarget(mode)) { |
299 visitor->VisitCodeTarget(this); | 299 visitor->VisitCodeTarget(this); |
300 } else if (mode == RelocInfo::CELL) { | 300 } else if (mode == RelocInfo::CELL) { |
301 visitor->VisitCell(this); | 301 visitor->VisitCell(this); |
302 } else if (mode == RelocInfo::EXTERNAL_REFERENCE) { | 302 } else if (mode == RelocInfo::EXTERNAL_REFERENCE) { |
303 visitor->VisitExternalReference(this); | 303 visitor->VisitExternalReference(this); |
304 CPU::FlushICache(pc_, sizeof(Address)); | 304 CpuFeatures::FlushICache(pc_, sizeof(Address)); |
305 } else if (RelocInfo::IsCodeAgeSequence(mode)) { | 305 } else if (RelocInfo::IsCodeAgeSequence(mode)) { |
306 visitor->VisitCodeAgeSequence(this); | 306 visitor->VisitCodeAgeSequence(this); |
307 } else if (((RelocInfo::IsJSReturn(mode) && | 307 } else if (((RelocInfo::IsJSReturn(mode) && |
308 IsPatchedReturnSequence()) || | 308 IsPatchedReturnSequence()) || |
309 (RelocInfo::IsDebugBreakSlot(mode) && | 309 (RelocInfo::IsDebugBreakSlot(mode) && |
310 IsPatchedDebugBreakSlotSequence())) && | 310 IsPatchedDebugBreakSlotSequence())) && |
311 isolate->debug()->has_break_points()) { | 311 isolate->debug()->has_break_points()) { |
312 visitor->VisitDebugTarget(this); | 312 visitor->VisitDebugTarget(this); |
313 } else if (IsRuntimeEntry(mode)) { | 313 } else if (IsRuntimeEntry(mode)) { |
314 visitor->VisitRuntimeEntry(this); | 314 visitor->VisitRuntimeEntry(this); |
315 } | 315 } |
316 } | 316 } |
317 | 317 |
318 | 318 |
319 template<typename StaticVisitor> | 319 template<typename StaticVisitor> |
320 void RelocInfo::Visit(Heap* heap) { | 320 void RelocInfo::Visit(Heap* heap) { |
321 RelocInfo::Mode mode = rmode(); | 321 RelocInfo::Mode mode = rmode(); |
322 if (mode == RelocInfo::EMBEDDED_OBJECT) { | 322 if (mode == RelocInfo::EMBEDDED_OBJECT) { |
323 StaticVisitor::VisitEmbeddedPointer(heap, this); | 323 StaticVisitor::VisitEmbeddedPointer(heap, this); |
324 CPU::FlushICache(pc_, sizeof(Address)); | 324 CpuFeatures::FlushICache(pc_, sizeof(Address)); |
325 } else if (RelocInfo::IsCodeTarget(mode)) { | 325 } else if (RelocInfo::IsCodeTarget(mode)) { |
326 StaticVisitor::VisitCodeTarget(heap, this); | 326 StaticVisitor::VisitCodeTarget(heap, this); |
327 } else if (mode == RelocInfo::CELL) { | 327 } else if (mode == RelocInfo::CELL) { |
328 StaticVisitor::VisitCell(heap, this); | 328 StaticVisitor::VisitCell(heap, this); |
329 } else if (mode == RelocInfo::EXTERNAL_REFERENCE) { | 329 } else if (mode == RelocInfo::EXTERNAL_REFERENCE) { |
330 StaticVisitor::VisitExternalReference(this); | 330 StaticVisitor::VisitExternalReference(this); |
331 CPU::FlushICache(pc_, sizeof(Address)); | 331 CpuFeatures::FlushICache(pc_, sizeof(Address)); |
332 } else if (RelocInfo::IsCodeAgeSequence(mode)) { | 332 } else if (RelocInfo::IsCodeAgeSequence(mode)) { |
333 StaticVisitor::VisitCodeAgeSequence(heap, this); | 333 StaticVisitor::VisitCodeAgeSequence(heap, this); |
334 } else if (heap->isolate()->debug()->has_break_points() && | 334 } else if (heap->isolate()->debug()->has_break_points() && |
335 ((RelocInfo::IsJSReturn(mode) && | 335 ((RelocInfo::IsJSReturn(mode) && |
336 IsPatchedReturnSequence()) || | 336 IsPatchedReturnSequence()) || |
337 (RelocInfo::IsDebugBreakSlot(mode) && | 337 (RelocInfo::IsDebugBreakSlot(mode) && |
338 IsPatchedDebugBreakSlotSequence()))) { | 338 IsPatchedDebugBreakSlotSequence()))) { |
339 StaticVisitor::VisitDebugTarget(heap, this); | 339 StaticVisitor::VisitDebugTarget(heap, this); |
340 } else if (IsRuntimeEntry(mode)) { | 340 } else if (IsRuntimeEntry(mode)) { |
341 StaticVisitor::VisitRuntimeEntry(this); | 341 StaticVisitor::VisitRuntimeEntry(this); |
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466 } | 466 } |
467 | 467 |
468 | 468 |
469 void Assembler::set_target_address_at(Address pc, | 469 void Assembler::set_target_address_at(Address pc, |
470 ConstantPoolArray* constant_pool, | 470 ConstantPoolArray* constant_pool, |
471 Address target, | 471 Address target, |
472 ICacheFlushMode icache_flush_mode) { | 472 ICacheFlushMode icache_flush_mode) { |
473 int32_t* p = reinterpret_cast<int32_t*>(pc); | 473 int32_t* p = reinterpret_cast<int32_t*>(pc); |
474 *p = target - (pc + sizeof(int32_t)); | 474 *p = target - (pc + sizeof(int32_t)); |
475 if (icache_flush_mode != SKIP_ICACHE_FLUSH) { | 475 if (icache_flush_mode != SKIP_ICACHE_FLUSH) { |
476 CPU::FlushICache(p, sizeof(int32_t)); | 476 CpuFeatures::FlushICache(p, sizeof(int32_t)); |
477 } | 477 } |
478 } | 478 } |
479 | 479 |
480 | 480 |
481 Address Assembler::target_address_from_return_address(Address pc) { | 481 Address Assembler::target_address_from_return_address(Address pc) { |
482 return pc - kCallTargetAddressOffset; | 482 return pc - kCallTargetAddressOffset; |
483 } | 483 } |
484 | 484 |
485 | 485 |
486 Displacement Assembler::disp_at(Label* L) { | 486 Displacement Assembler::disp_at(Label* L) { |
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557 | 557 |
558 Operand::Operand(int32_t disp, RelocInfo::Mode rmode) { | 558 Operand::Operand(int32_t disp, RelocInfo::Mode rmode) { |
559 // [disp/r] | 559 // [disp/r] |
560 set_modrm(0, ebp); | 560 set_modrm(0, ebp); |
561 set_dispr(disp, rmode); | 561 set_dispr(disp, rmode); |
562 } | 562 } |
563 | 563 |
564 } } // namespace v8::internal | 564 } } // namespace v8::internal |
565 | 565 |
566 #endif // V8_IA32_ASSEMBLER_IA32_INL_H_ | 566 #endif // V8_IA32_ASSEMBLER_IA32_INL_H_ |
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