Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | |
| 2 | // Copyright (c) 1994-2006 Sun Microsystems Inc. |
| 3 | // All Rights Reserved. |
| 4 | // |
| 5 | // Redistribution and use in source and binary forms, with or without |
| 6 | // modification, are permitted provided that the following conditions are |
| 7 | // met: |
| 8 | // |
| 9 | // - Redistributions of source code must retain the above copyright notice, |
| 10 | // this list of conditions and the following disclaimer. |
| 11 | // |
| 12 | // - Redistribution in binary form must reproduce the above copyright |
| 13 | // notice, this list of conditions and the following disclaimer in the |
| 14 | // documentation and/or other materials provided with the distribution. |
| 15 | // |
| 16 | // - Neither the name of Sun Microsystems or the names of contributors may |
| 17 | // be used to endorse or promote products derived from this software without |
| 18 | // specific prior written permission. |
| 19 | // |
| 20 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| 21 | // IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| 22 | // THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 23 | // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| 24 | // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 25 | // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 26 | // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 27 | // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 28 | // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 29 | // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 30 | // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | |
| 32 | // The original source code covered by the above license above has been |
| 33 | // modified significantly by Google Inc. |
| 34 | // Copyright 2012 the V8 project authors. All rights reserved. |
| 35 | |
| 36 | |
| 37 | #ifndef V8_MIPS_ASSEMBLER_MIPS_INL_H_ |
| 38 | #define V8_MIPS_ASSEMBLER_MIPS_INL_H_ |
| 39 | |
| 40 | #include "src/mips64/assembler-mips64.h" |
| 41 | |
| 42 | #include "src/assembler.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 43 | #include "src/debug/debug.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 44 | |
| 45 | |
| 46 | namespace v8 { |
| 47 | namespace internal { |
| 48 | |
| 49 | |
| 50 | bool CpuFeatures::SupportsCrankshaft() { return IsSupported(FPU); } |
| 51 | |
| 52 | |
| 53 | // ----------------------------------------------------------------------------- |
| 54 | // Operand and MemOperand. |
| 55 | |
| 56 | Operand::Operand(int64_t immediate, RelocInfo::Mode rmode) { |
| 57 | rm_ = no_reg; |
| 58 | imm64_ = immediate; |
| 59 | rmode_ = rmode; |
| 60 | } |
| 61 | |
| 62 | |
| 63 | Operand::Operand(const ExternalReference& f) { |
| 64 | rm_ = no_reg; |
| 65 | imm64_ = reinterpret_cast<int64_t>(f.address()); |
| 66 | rmode_ = RelocInfo::EXTERNAL_REFERENCE; |
| 67 | } |
| 68 | |
| 69 | |
| 70 | Operand::Operand(Smi* value) { |
| 71 | rm_ = no_reg; |
| 72 | imm64_ = reinterpret_cast<intptr_t>(value); |
| 73 | rmode_ = RelocInfo::NONE32; |
| 74 | } |
| 75 | |
| 76 | |
| 77 | Operand::Operand(Register rm) { |
| 78 | rm_ = rm; |
| 79 | } |
| 80 | |
| 81 | |
| 82 | bool Operand::is_reg() const { |
| 83 | return rm_.is_valid(); |
| 84 | } |
| 85 | |
| 86 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 87 | // ----------------------------------------------------------------------------- |
| 88 | // RelocInfo. |
| 89 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 90 | void RelocInfo::apply(intptr_t delta) { |
| 91 | if (IsInternalReference(rmode_) || IsInternalReferenceEncoded(rmode_)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 92 | // Absolute code pointer inside code object moves with the code object. |
| 93 | byte* p = reinterpret_cast<byte*>(pc_); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 94 | int count = Assembler::RelocateInternalReference(rmode_, p, delta); |
| 95 | Assembler::FlushICache(isolate_, p, count * sizeof(uint32_t)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 96 | } |
| 97 | } |
| 98 | |
| 99 | |
| 100 | Address RelocInfo::target_address() { |
| 101 | DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)); |
| 102 | return Assembler::target_address_at(pc_, host_); |
| 103 | } |
| 104 | |
| 105 | |
| 106 | Address RelocInfo::target_address_address() { |
| 107 | DCHECK(IsCodeTarget(rmode_) || |
| 108 | IsRuntimeEntry(rmode_) || |
| 109 | rmode_ == EMBEDDED_OBJECT || |
| 110 | rmode_ == EXTERNAL_REFERENCE); |
| 111 | // Read the address of the word containing the target_address in an |
| 112 | // instruction stream. |
| 113 | // The only architecture-independent user of this function is the serializer. |
| 114 | // The serializer uses it to find out how many raw bytes of instruction to |
| 115 | // output before the next target. |
| 116 | // For an instruction like LUI/ORI where the target bits are mixed into the |
| 117 | // instruction bits, the size of the target will be zero, indicating that the |
| 118 | // serializer should not step forward in memory after a target is resolved |
| 119 | // and written. In this case the target_address_address function should |
| 120 | // return the end of the instructions to be patched, allowing the |
| 121 | // deserializer to deserialize the instructions as raw bytes and put them in |
| 122 | // place, ready to be patched with the target. After jump optimization, |
| 123 | // that is the address of the instruction that follows J/JAL/JR/JALR |
| 124 | // instruction. |
| 125 | // return reinterpret_cast<Address>( |
| 126 | // pc_ + Assembler::kInstructionsFor32BitConstant * Assembler::kInstrSize); |
| 127 | return reinterpret_cast<Address>( |
| 128 | pc_ + Assembler::kInstructionsFor64BitConstant * Assembler::kInstrSize); |
| 129 | } |
| 130 | |
| 131 | |
| 132 | Address RelocInfo::constant_pool_entry_address() { |
| 133 | UNREACHABLE(); |
| 134 | return NULL; |
| 135 | } |
| 136 | |
| 137 | |
| 138 | int RelocInfo::target_address_size() { |
| 139 | return Assembler::kSpecialTargetSize; |
| 140 | } |
| 141 | |
| 142 | |
| 143 | void RelocInfo::set_target_address(Address target, |
| 144 | WriteBarrierMode write_barrier_mode, |
| 145 | ICacheFlushMode icache_flush_mode) { |
| 146 | DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 147 | Assembler::set_target_address_at(isolate_, pc_, host_, target, |
| 148 | icache_flush_mode); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 149 | if (write_barrier_mode == UPDATE_WRITE_BARRIER && |
| 150 | host() != NULL && IsCodeTarget(rmode_)) { |
| 151 | Object* target_code = Code::GetCodeFromTargetAddress(target); |
| 152 | host()->GetHeap()->incremental_marking()->RecordWriteIntoCode( |
| 153 | host(), this, HeapObject::cast(target_code)); |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | |
| 158 | Address Assembler::target_address_from_return_address(Address pc) { |
| 159 | return pc - kCallTargetAddressOffset; |
| 160 | } |
| 161 | |
| 162 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 163 | void Assembler::set_target_internal_reference_encoded_at(Address pc, |
| 164 | Address target) { |
| 165 | // Encoded internal references are j/jal instructions. |
| 166 | Instr instr = Assembler::instr_at(pc + 0 * Assembler::kInstrSize); |
| 167 | |
| 168 | uint64_t imm28 = |
| 169 | (reinterpret_cast<uint64_t>(target) & static_cast<uint64_t>(kImm28Mask)); |
| 170 | |
| 171 | instr &= ~kImm26Mask; |
| 172 | uint64_t imm26 = imm28 >> 2; |
| 173 | DCHECK(is_uint26(imm26)); |
| 174 | |
| 175 | instr_at_put(pc, instr | (imm26 & kImm26Mask)); |
| 176 | // Currently used only by deserializer, and all code will be flushed |
| 177 | // after complete deserialization, no need to flush on each reference. |
| 178 | } |
| 179 | |
| 180 | |
| 181 | void Assembler::deserialization_set_target_internal_reference_at( |
| 182 | Isolate* isolate, Address pc, Address target, RelocInfo::Mode mode) { |
| 183 | if (mode == RelocInfo::INTERNAL_REFERENCE_ENCODED) { |
| 184 | DCHECK(IsJ(instr_at(pc))); |
| 185 | set_target_internal_reference_encoded_at(pc, target); |
| 186 | } else { |
| 187 | DCHECK(mode == RelocInfo::INTERNAL_REFERENCE); |
| 188 | Memory::Address_at(pc) = target; |
| 189 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | |
| 193 | Object* RelocInfo::target_object() { |
| 194 | DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
| 195 | return reinterpret_cast<Object*>(Assembler::target_address_at(pc_, host_)); |
| 196 | } |
| 197 | |
| 198 | |
| 199 | Handle<Object> RelocInfo::target_object_handle(Assembler* origin) { |
| 200 | DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
| 201 | return Handle<Object>(reinterpret_cast<Object**>( |
| 202 | Assembler::target_address_at(pc_, host_))); |
| 203 | } |
| 204 | |
| 205 | |
| 206 | void RelocInfo::set_target_object(Object* target, |
| 207 | WriteBarrierMode write_barrier_mode, |
| 208 | ICacheFlushMode icache_flush_mode) { |
| 209 | DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 210 | Assembler::set_target_address_at(isolate_, pc_, host_, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 211 | reinterpret_cast<Address>(target), |
| 212 | icache_flush_mode); |
| 213 | if (write_barrier_mode == UPDATE_WRITE_BARRIER && |
| 214 | host() != NULL && |
| 215 | target->IsHeapObject()) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 216 | host()->GetHeap()->incremental_marking()->RecordWriteIntoCode( |
| 217 | host(), this, HeapObject::cast(target)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 218 | } |
| 219 | } |
| 220 | |
| 221 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 222 | Address RelocInfo::target_external_reference() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 223 | DCHECK(rmode_ == EXTERNAL_REFERENCE); |
| 224 | return Assembler::target_address_at(pc_, host_); |
| 225 | } |
| 226 | |
| 227 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 228 | Address RelocInfo::target_internal_reference() { |
| 229 | if (rmode_ == INTERNAL_REFERENCE) { |
| 230 | return Memory::Address_at(pc_); |
| 231 | } else { |
| 232 | // Encoded internal references are j/jal instructions. |
| 233 | DCHECK(rmode_ == INTERNAL_REFERENCE_ENCODED); |
| 234 | Instr instr = Assembler::instr_at(pc_ + 0 * Assembler::kInstrSize); |
| 235 | instr &= kImm26Mask; |
| 236 | uint64_t imm28 = instr << 2; |
| 237 | uint64_t segment = |
| 238 | (reinterpret_cast<uint64_t>(pc_) & ~static_cast<uint64_t>(kImm28Mask)); |
| 239 | return reinterpret_cast<Address>(segment | imm28); |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | |
| 244 | Address RelocInfo::target_internal_reference_address() { |
| 245 | DCHECK(rmode_ == INTERNAL_REFERENCE || rmode_ == INTERNAL_REFERENCE_ENCODED); |
| 246 | return reinterpret_cast<Address>(pc_); |
| 247 | } |
| 248 | |
| 249 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 250 | Address RelocInfo::target_runtime_entry(Assembler* origin) { |
| 251 | DCHECK(IsRuntimeEntry(rmode_)); |
| 252 | return target_address(); |
| 253 | } |
| 254 | |
| 255 | |
| 256 | void RelocInfo::set_target_runtime_entry(Address target, |
| 257 | WriteBarrierMode write_barrier_mode, |
| 258 | ICacheFlushMode icache_flush_mode) { |
| 259 | DCHECK(IsRuntimeEntry(rmode_)); |
| 260 | if (target_address() != target) |
| 261 | set_target_address(target, write_barrier_mode, icache_flush_mode); |
| 262 | } |
| 263 | |
| 264 | |
| 265 | Handle<Cell> RelocInfo::target_cell_handle() { |
| 266 | DCHECK(rmode_ == RelocInfo::CELL); |
| 267 | Address address = Memory::Address_at(pc_); |
| 268 | return Handle<Cell>(reinterpret_cast<Cell**>(address)); |
| 269 | } |
| 270 | |
| 271 | |
| 272 | Cell* RelocInfo::target_cell() { |
| 273 | DCHECK(rmode_ == RelocInfo::CELL); |
| 274 | return Cell::FromValueAddress(Memory::Address_at(pc_)); |
| 275 | } |
| 276 | |
| 277 | |
| 278 | void RelocInfo::set_target_cell(Cell* cell, |
| 279 | WriteBarrierMode write_barrier_mode, |
| 280 | ICacheFlushMode icache_flush_mode) { |
| 281 | DCHECK(rmode_ == RelocInfo::CELL); |
| 282 | Address address = cell->address() + Cell::kValueOffset; |
| 283 | Memory::Address_at(pc_) = address; |
| 284 | if (write_barrier_mode == UPDATE_WRITE_BARRIER && host() != NULL) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 285 | host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(host(), this, |
| 286 | cell); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 287 | } |
| 288 | } |
| 289 | |
| 290 | |
| 291 | static const int kNoCodeAgeSequenceLength = 9 * Assembler::kInstrSize; |
| 292 | |
| 293 | |
| 294 | Handle<Object> RelocInfo::code_age_stub_handle(Assembler* origin) { |
| 295 | UNREACHABLE(); // This should never be reached on Arm. |
| 296 | return Handle<Object>(); |
| 297 | } |
| 298 | |
| 299 | |
| 300 | Code* RelocInfo::code_age_stub() { |
| 301 | DCHECK(rmode_ == RelocInfo::CODE_AGE_SEQUENCE); |
| 302 | return Code::GetCodeFromTargetAddress( |
| 303 | Assembler::target_address_at(pc_ + Assembler::kInstrSize, host_)); |
| 304 | } |
| 305 | |
| 306 | |
| 307 | void RelocInfo::set_code_age_stub(Code* stub, |
| 308 | ICacheFlushMode icache_flush_mode) { |
| 309 | DCHECK(rmode_ == RelocInfo::CODE_AGE_SEQUENCE); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 310 | Assembler::set_target_address_at(isolate_, pc_ + Assembler::kInstrSize, host_, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 311 | stub->instruction_start()); |
| 312 | } |
| 313 | |
| 314 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 315 | Address RelocInfo::debug_call_address() { |
| 316 | // The pc_ offset of 0 assumes patched debug break slot or return |
| 317 | // sequence. |
| 318 | DCHECK(IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 319 | return Assembler::target_address_at(pc_, host_); |
| 320 | } |
| 321 | |
| 322 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 323 | void RelocInfo::set_debug_call_address(Address target) { |
| 324 | DCHECK(IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence()); |
| 325 | // The pc_ offset of 0 assumes patched debug break slot or return |
| 326 | // sequence. |
| 327 | Assembler::set_target_address_at(isolate_, pc_, host_, target); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 328 | if (host() != NULL) { |
| 329 | Object* target_code = Code::GetCodeFromTargetAddress(target); |
| 330 | host()->GetHeap()->incremental_marking()->RecordWriteIntoCode( |
| 331 | host(), this, HeapObject::cast(target_code)); |
| 332 | } |
| 333 | } |
| 334 | |
| 335 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 336 | void RelocInfo::WipeOut() { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 337 | DCHECK(IsEmbeddedObject(rmode_) || IsCodeTarget(rmode_) || |
| 338 | IsRuntimeEntry(rmode_) || IsExternalReference(rmode_) || |
| 339 | IsInternalReference(rmode_) || IsInternalReferenceEncoded(rmode_)); |
| 340 | if (IsInternalReference(rmode_)) { |
| 341 | Memory::Address_at(pc_) = NULL; |
| 342 | } else if (IsInternalReferenceEncoded(rmode_)) { |
| 343 | Assembler::set_target_internal_reference_encoded_at(pc_, nullptr); |
| 344 | } else { |
| 345 | Assembler::set_target_address_at(isolate_, pc_, host_, NULL); |
| 346 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 347 | } |
| 348 | |
| 349 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 350 | void RelocInfo::Visit(Isolate* isolate, ObjectVisitor* visitor) { |
| 351 | RelocInfo::Mode mode = rmode(); |
| 352 | if (mode == RelocInfo::EMBEDDED_OBJECT) { |
| 353 | visitor->VisitEmbeddedPointer(this); |
| 354 | } else if (RelocInfo::IsCodeTarget(mode)) { |
| 355 | visitor->VisitCodeTarget(this); |
| 356 | } else if (mode == RelocInfo::CELL) { |
| 357 | visitor->VisitCell(this); |
| 358 | } else if (mode == RelocInfo::EXTERNAL_REFERENCE) { |
| 359 | visitor->VisitExternalReference(this); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 360 | } else if (mode == RelocInfo::INTERNAL_REFERENCE || |
| 361 | mode == RelocInfo::INTERNAL_REFERENCE_ENCODED) { |
| 362 | visitor->VisitInternalReference(this); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 363 | } else if (RelocInfo::IsCodeAgeSequence(mode)) { |
| 364 | visitor->VisitCodeAgeSequence(this); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 365 | } else if (RelocInfo::IsDebugBreakSlot(mode) && |
| 366 | IsPatchedDebugBreakSlotSequence()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 367 | visitor->VisitDebugTarget(this); |
| 368 | } else if (RelocInfo::IsRuntimeEntry(mode)) { |
| 369 | visitor->VisitRuntimeEntry(this); |
| 370 | } |
| 371 | } |
| 372 | |
| 373 | |
| 374 | template<typename StaticVisitor> |
| 375 | void RelocInfo::Visit(Heap* heap) { |
| 376 | RelocInfo::Mode mode = rmode(); |
| 377 | if (mode == RelocInfo::EMBEDDED_OBJECT) { |
| 378 | StaticVisitor::VisitEmbeddedPointer(heap, this); |
| 379 | } else if (RelocInfo::IsCodeTarget(mode)) { |
| 380 | StaticVisitor::VisitCodeTarget(heap, this); |
| 381 | } else if (mode == RelocInfo::CELL) { |
| 382 | StaticVisitor::VisitCell(heap, this); |
| 383 | } else if (mode == RelocInfo::EXTERNAL_REFERENCE) { |
| 384 | StaticVisitor::VisitExternalReference(this); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 385 | } else if (mode == RelocInfo::INTERNAL_REFERENCE || |
| 386 | mode == RelocInfo::INTERNAL_REFERENCE_ENCODED) { |
| 387 | StaticVisitor::VisitInternalReference(this); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 388 | } else if (RelocInfo::IsCodeAgeSequence(mode)) { |
| 389 | StaticVisitor::VisitCodeAgeSequence(heap, this); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 390 | } else if (RelocInfo::IsDebugBreakSlot(mode) && |
| 391 | IsPatchedDebugBreakSlotSequence()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 392 | StaticVisitor::VisitDebugTarget(heap, this); |
| 393 | } else if (RelocInfo::IsRuntimeEntry(mode)) { |
| 394 | StaticVisitor::VisitRuntimeEntry(this); |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | |
| 399 | // ----------------------------------------------------------------------------- |
| 400 | // Assembler. |
| 401 | |
| 402 | |
| 403 | void Assembler::CheckBuffer() { |
| 404 | if (buffer_space() <= kGap) { |
| 405 | GrowBuffer(); |
| 406 | } |
| 407 | } |
| 408 | |
| 409 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 410 | void Assembler::CheckTrampolinePoolQuick(int extra_instructions) { |
| 411 | if (pc_offset() >= next_buffer_check_ - extra_instructions * kInstrSize) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 412 | CheckTrampolinePool(); |
| 413 | } |
| 414 | } |
| 415 | |
| 416 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 417 | void Assembler::CheckForEmitInForbiddenSlot() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 418 | if (!is_buffer_growth_blocked()) { |
| 419 | CheckBuffer(); |
| 420 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 421 | if (IsPrevInstrCompactBranch()) { |
| 422 | // Nop instruction to preceed a CTI in forbidden slot: |
| 423 | Instr nop = SPECIAL | SLL; |
| 424 | *reinterpret_cast<Instr*>(pc_) = nop; |
| 425 | pc_ += kInstrSize; |
| 426 | |
| 427 | ClearCompactBranchState(); |
| 428 | } |
| 429 | } |
| 430 | |
| 431 | |
| 432 | void Assembler::EmitHelper(Instr x, CompactBranchType is_compact_branch) { |
| 433 | if (IsPrevInstrCompactBranch()) { |
| 434 | if (Instruction::IsForbiddenAfterBranchInstr(x)) { |
| 435 | // Nop instruction to preceed a CTI in forbidden slot: |
| 436 | Instr nop = SPECIAL | SLL; |
| 437 | *reinterpret_cast<Instr*>(pc_) = nop; |
| 438 | pc_ += kInstrSize; |
| 439 | } |
| 440 | ClearCompactBranchState(); |
| 441 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 442 | *reinterpret_cast<Instr*>(pc_) = x; |
| 443 | pc_ += kInstrSize; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 444 | if (is_compact_branch == CompactBranchType::COMPACT_BRANCH) { |
| 445 | EmittedCompactBranchInstruction(); |
| 446 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 447 | CheckTrampolinePoolQuick(); |
| 448 | } |
| 449 | |
| 450 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 451 | template <typename T> |
| 452 | void Assembler::EmitHelper(T x) { |
| 453 | *reinterpret_cast<T*>(pc_) = x; |
| 454 | pc_ += sizeof(x); |
| 455 | CheckTrampolinePoolQuick(); |
| 456 | } |
| 457 | |
| 458 | |
| 459 | void Assembler::emit(Instr x, CompactBranchType is_compact_branch) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 460 | if (!is_buffer_growth_blocked()) { |
| 461 | CheckBuffer(); |
| 462 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 463 | EmitHelper(x, is_compact_branch); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 467 | void Assembler::emit(uint64_t data) { |
| 468 | CheckForEmitInForbiddenSlot(); |
| 469 | EmitHelper(data); |
| 470 | } |
| 471 | |
| 472 | |
| 473 | } // namespace internal |
| 474 | } // namespace v8 |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 475 | |
| 476 | #endif // V8_MIPS_ASSEMBLER_MIPS_INL_H_ |