Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1 | // Copyright (c) 1994-2006 Sun Microsystems Inc. |
| 2 | // All Rights Reserved. |
| 3 | // |
| 4 | // Redistribution and use in source and binary forms, with or without |
| 5 | // modification, are permitted provided that the following conditions |
| 6 | // are met: |
| 7 | // |
| 8 | // - Redistributions of source code must retain the above copyright notice, |
| 9 | // this list of conditions and the following disclaimer. |
| 10 | // |
| 11 | // - Redistribution in binary form must reproduce the above copyright |
| 12 | // notice, this list of conditions and the following disclaimer in the |
| 13 | // documentation and/or other materials provided with the |
| 14 | // 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 |
| 21 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 23 | // FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 24 | // COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 25 | // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 26 | // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| 27 | // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | // HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 29 | // STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 30 | // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 31 | // OF THE POSSIBILITY OF SUCH DAMAGE. |
| 32 | |
| 33 | // The original source code covered by the above license above has been modified |
| 34 | // significantly by Google Inc. |
| 35 | // Copyright 2014 the V8 project authors. All rights reserved. |
| 36 | |
| 37 | #ifndef V8_PPC_ASSEMBLER_PPC_INL_H_ |
| 38 | #define V8_PPC_ASSEMBLER_PPC_INL_H_ |
| 39 | |
| 40 | #include "src/ppc/assembler-ppc.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" |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 44 | |
| 45 | |
| 46 | namespace v8 { |
| 47 | namespace internal { |
| 48 | |
| 49 | |
| 50 | bool CpuFeatures::SupportsCrankshaft() { return true; } |
| 51 | |
| 52 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 53 | void RelocInfo::apply(intptr_t delta) { |
| 54 | // absolute code pointer inside code object moves with the code object. |
| 55 | if (IsInternalReference(rmode_)) { |
| 56 | // Jump table entry |
| 57 | Address target = Memory::Address_at(pc_); |
| 58 | Memory::Address_at(pc_) = target + delta; |
| 59 | } else { |
| 60 | // mov sequence |
| 61 | DCHECK(IsInternalReferenceEncoded(rmode_)); |
| 62 | Address target = Assembler::target_address_at(pc_, host_); |
| 63 | Assembler::set_target_address_at(isolate_, pc_, host_, target + delta, |
| 64 | SKIP_ICACHE_FLUSH); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 65 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 66 | } |
| 67 | |
| 68 | |
| 69 | Address RelocInfo::target_internal_reference() { |
| 70 | if (IsInternalReference(rmode_)) { |
| 71 | // Jump table entry |
| 72 | return Memory::Address_at(pc_); |
| 73 | } else { |
| 74 | // mov sequence |
| 75 | DCHECK(IsInternalReferenceEncoded(rmode_)); |
| 76 | return Assembler::target_address_at(pc_, host_); |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | |
| 81 | Address RelocInfo::target_internal_reference_address() { |
| 82 | DCHECK(IsInternalReference(rmode_) || IsInternalReferenceEncoded(rmode_)); |
| 83 | return reinterpret_cast<Address>(pc_); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 84 | } |
| 85 | |
| 86 | |
| 87 | Address RelocInfo::target_address() { |
| 88 | DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)); |
| 89 | return Assembler::target_address_at(pc_, host_); |
| 90 | } |
| 91 | |
| 92 | |
| 93 | Address RelocInfo::target_address_address() { |
| 94 | DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_) || |
| 95 | rmode_ == EMBEDDED_OBJECT || rmode_ == EXTERNAL_REFERENCE); |
| 96 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 97 | if (FLAG_enable_embedded_constant_pool && |
| 98 | Assembler::IsConstantPoolLoadStart(pc_)) { |
| 99 | // We return the PC for embedded constant pool since this function is used |
| 100 | // by the serializer and expects the address to reside within the code |
| 101 | // object. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 102 | return reinterpret_cast<Address>(pc_); |
| 103 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 104 | |
| 105 | // Read the address of the word containing the target_address in an |
| 106 | // instruction stream. |
| 107 | // The only architecture-independent user of this function is the serializer. |
| 108 | // The serializer uses it to find out how many raw bytes of instruction to |
| 109 | // output before the next target. |
| 110 | // For an instruction like LIS/ORI where the target bits are mixed into the |
| 111 | // instruction bits, the size of the target will be zero, indicating that the |
| 112 | // serializer should not step forward in memory after a target is resolved |
| 113 | // and written. |
| 114 | return reinterpret_cast<Address>(pc_); |
| 115 | } |
| 116 | |
| 117 | |
| 118 | Address RelocInfo::constant_pool_entry_address() { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 119 | if (FLAG_enable_embedded_constant_pool) { |
| 120 | Address constant_pool = host_->constant_pool(); |
| 121 | DCHECK(constant_pool); |
| 122 | ConstantPoolEntry::Access access; |
| 123 | if (Assembler::IsConstantPoolLoadStart(pc_, &access)) |
| 124 | return Assembler::target_constant_pool_address_at( |
| 125 | pc_, constant_pool, access, ConstantPoolEntry::INTPTR); |
| 126 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 127 | UNREACHABLE(); |
| 128 | return NULL; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 129 | } |
| 130 | |
| 131 | |
| 132 | int RelocInfo::target_address_size() { return Assembler::kSpecialTargetSize; } |
| 133 | |
| 134 | |
| 135 | void RelocInfo::set_target_address(Address target, |
| 136 | WriteBarrierMode write_barrier_mode, |
| 137 | ICacheFlushMode icache_flush_mode) { |
| 138 | DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 139 | Assembler::set_target_address_at(isolate_, pc_, host_, target, |
| 140 | icache_flush_mode); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 141 | if (write_barrier_mode == UPDATE_WRITE_BARRIER && host() != NULL && |
| 142 | IsCodeTarget(rmode_)) { |
| 143 | Object* target_code = Code::GetCodeFromTargetAddress(target); |
| 144 | host()->GetHeap()->incremental_marking()->RecordWriteIntoCode( |
| 145 | host(), this, HeapObject::cast(target_code)); |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 150 | Address Assembler::target_address_from_return_address(Address pc) { |
| 151 | // Returns the address of the call target from the return address that will |
| 152 | // be returned to after a call. |
| 153 | // Call sequence is : |
| 154 | // mov ip, @ call address |
| 155 | // mtlr ip |
| 156 | // blrl |
| 157 | // @ return address |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 158 | int len; |
| 159 | ConstantPoolEntry::Access access; |
| 160 | if (FLAG_enable_embedded_constant_pool && |
| 161 | IsConstantPoolLoadEnd(pc - 3 * kInstrSize, &access)) { |
| 162 | len = (access == ConstantPoolEntry::OVERFLOWED) ? 2 : 1; |
| 163 | } else { |
| 164 | len = kMovInstructionsNoConstantPool; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 165 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 166 | return pc - (len + 2) * kInstrSize; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 167 | } |
| 168 | |
| 169 | |
| 170 | Address Assembler::return_address_from_call_start(Address pc) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 171 | int len; |
| 172 | ConstantPoolEntry::Access access; |
| 173 | if (FLAG_enable_embedded_constant_pool && |
| 174 | IsConstantPoolLoadStart(pc, &access)) { |
| 175 | len = (access == ConstantPoolEntry::OVERFLOWED) ? 2 : 1; |
| 176 | } else { |
| 177 | len = kMovInstructionsNoConstantPool; |
| 178 | } |
| 179 | return pc + (len + 2) * kInstrSize; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 180 | } |
| 181 | |
| 182 | |
| 183 | Object* RelocInfo::target_object() { |
| 184 | DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
| 185 | return reinterpret_cast<Object*>(Assembler::target_address_at(pc_, host_)); |
| 186 | } |
| 187 | |
| 188 | |
| 189 | Handle<Object> RelocInfo::target_object_handle(Assembler* origin) { |
| 190 | DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
| 191 | return Handle<Object>( |
| 192 | reinterpret_cast<Object**>(Assembler::target_address_at(pc_, host_))); |
| 193 | } |
| 194 | |
| 195 | |
| 196 | void RelocInfo::set_target_object(Object* target, |
| 197 | WriteBarrierMode write_barrier_mode, |
| 198 | ICacheFlushMode icache_flush_mode) { |
| 199 | DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 200 | Assembler::set_target_address_at(isolate_, pc_, host_, |
| 201 | reinterpret_cast<Address>(target), |
| 202 | icache_flush_mode); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 203 | if (write_barrier_mode == UPDATE_WRITE_BARRIER && host() != NULL && |
| 204 | target->IsHeapObject()) { |
| 205 | host()->GetHeap()->incremental_marking()->RecordWrite( |
| 206 | host(), &Memory::Object_at(pc_), HeapObject::cast(target)); |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 211 | Address RelocInfo::target_external_reference() { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 212 | DCHECK(rmode_ == EXTERNAL_REFERENCE); |
| 213 | return Assembler::target_address_at(pc_, host_); |
| 214 | } |
| 215 | |
| 216 | |
| 217 | Address RelocInfo::target_runtime_entry(Assembler* origin) { |
| 218 | DCHECK(IsRuntimeEntry(rmode_)); |
| 219 | return target_address(); |
| 220 | } |
| 221 | |
| 222 | |
| 223 | void RelocInfo::set_target_runtime_entry(Address target, |
| 224 | WriteBarrierMode write_barrier_mode, |
| 225 | ICacheFlushMode icache_flush_mode) { |
| 226 | DCHECK(IsRuntimeEntry(rmode_)); |
| 227 | if (target_address() != target) |
| 228 | set_target_address(target, write_barrier_mode, icache_flush_mode); |
| 229 | } |
| 230 | |
| 231 | |
| 232 | Handle<Cell> RelocInfo::target_cell_handle() { |
| 233 | DCHECK(rmode_ == RelocInfo::CELL); |
| 234 | Address address = Memory::Address_at(pc_); |
| 235 | return Handle<Cell>(reinterpret_cast<Cell**>(address)); |
| 236 | } |
| 237 | |
| 238 | |
| 239 | Cell* RelocInfo::target_cell() { |
| 240 | DCHECK(rmode_ == RelocInfo::CELL); |
| 241 | return Cell::FromValueAddress(Memory::Address_at(pc_)); |
| 242 | } |
| 243 | |
| 244 | |
| 245 | void RelocInfo::set_target_cell(Cell* cell, WriteBarrierMode write_barrier_mode, |
| 246 | ICacheFlushMode icache_flush_mode) { |
| 247 | DCHECK(rmode_ == RelocInfo::CELL); |
| 248 | Address address = cell->address() + Cell::kValueOffset; |
| 249 | Memory::Address_at(pc_) = address; |
| 250 | if (write_barrier_mode == UPDATE_WRITE_BARRIER && host() != NULL) { |
| 251 | // TODO(1550) We are passing NULL as a slot because cell can never be on |
| 252 | // evacuation candidate. |
| 253 | host()->GetHeap()->incremental_marking()->RecordWrite(host(), NULL, cell); |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 258 | static const int kNoCodeAgeInstructions = |
| 259 | FLAG_enable_embedded_constant_pool ? 7 : 6; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 260 | static const int kCodeAgingInstructions = |
| 261 | Assembler::kMovInstructionsNoConstantPool + 3; |
| 262 | static const int kNoCodeAgeSequenceInstructions = |
| 263 | ((kNoCodeAgeInstructions >= kCodeAgingInstructions) |
| 264 | ? kNoCodeAgeInstructions |
| 265 | : kCodeAgingInstructions); |
| 266 | static const int kNoCodeAgeSequenceNops = |
| 267 | (kNoCodeAgeSequenceInstructions - kNoCodeAgeInstructions); |
| 268 | static const int kCodeAgingSequenceNops = |
| 269 | (kNoCodeAgeSequenceInstructions - kCodeAgingInstructions); |
| 270 | static const int kCodeAgingTargetDelta = 1 * Assembler::kInstrSize; |
| 271 | static const int kNoCodeAgeSequenceLength = |
| 272 | (kNoCodeAgeSequenceInstructions * Assembler::kInstrSize); |
| 273 | |
| 274 | |
| 275 | Handle<Object> RelocInfo::code_age_stub_handle(Assembler* origin) { |
| 276 | UNREACHABLE(); // This should never be reached on PPC. |
| 277 | return Handle<Object>(); |
| 278 | } |
| 279 | |
| 280 | |
| 281 | Code* RelocInfo::code_age_stub() { |
| 282 | DCHECK(rmode_ == RelocInfo::CODE_AGE_SEQUENCE); |
| 283 | return Code::GetCodeFromTargetAddress( |
| 284 | Assembler::target_address_at(pc_ + kCodeAgingTargetDelta, host_)); |
| 285 | } |
| 286 | |
| 287 | |
| 288 | void RelocInfo::set_code_age_stub(Code* stub, |
| 289 | ICacheFlushMode icache_flush_mode) { |
| 290 | DCHECK(rmode_ == RelocInfo::CODE_AGE_SEQUENCE); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 291 | Assembler::set_target_address_at(isolate_, pc_ + kCodeAgingTargetDelta, host_, |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 292 | stub->instruction_start(), |
| 293 | icache_flush_mode); |
| 294 | } |
| 295 | |
| 296 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 297 | Address RelocInfo::debug_call_address() { |
| 298 | DCHECK(IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence()); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 299 | return Assembler::target_address_at(pc_, host_); |
| 300 | } |
| 301 | |
| 302 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 303 | void RelocInfo::set_debug_call_address(Address target) { |
| 304 | DCHECK(IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence()); |
| 305 | Assembler::set_target_address_at(isolate_, pc_, host_, target); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 306 | if (host() != NULL) { |
| 307 | Object* target_code = Code::GetCodeFromTargetAddress(target); |
| 308 | host()->GetHeap()->incremental_marking()->RecordWriteIntoCode( |
| 309 | host(), this, HeapObject::cast(target_code)); |
| 310 | } |
| 311 | } |
| 312 | |
| 313 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 314 | void RelocInfo::WipeOut() { |
| 315 | DCHECK(IsEmbeddedObject(rmode_) || IsCodeTarget(rmode_) || |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 316 | IsRuntimeEntry(rmode_) || IsExternalReference(rmode_) || |
| 317 | IsInternalReference(rmode_) || IsInternalReferenceEncoded(rmode_)); |
| 318 | if (IsInternalReference(rmode_)) { |
| 319 | // Jump table entry |
| 320 | Memory::Address_at(pc_) = NULL; |
| 321 | } else if (IsInternalReferenceEncoded(rmode_)) { |
| 322 | // mov sequence |
| 323 | // Currently used only by deserializer, no need to flush. |
| 324 | Assembler::set_target_address_at(isolate_, pc_, host_, NULL, |
| 325 | SKIP_ICACHE_FLUSH); |
| 326 | } else { |
| 327 | Assembler::set_target_address_at(isolate_, pc_, host_, NULL); |
| 328 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 329 | } |
| 330 | |
| 331 | |
| 332 | bool RelocInfo::IsPatchedReturnSequence() { |
| 333 | // |
| 334 | // The patched return sequence is defined by |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 335 | // BreakLocation::SetDebugBreakAtReturn() |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 336 | // FIXED_SEQUENCE |
| 337 | |
| 338 | Instr instr0 = Assembler::instr_at(pc_); |
| 339 | Instr instr1 = Assembler::instr_at(pc_ + 1 * Assembler::kInstrSize); |
| 340 | #if V8_TARGET_ARCH_PPC64 |
| 341 | Instr instr3 = Assembler::instr_at(pc_ + (3 * Assembler::kInstrSize)); |
| 342 | Instr instr4 = Assembler::instr_at(pc_ + (4 * Assembler::kInstrSize)); |
| 343 | Instr binstr = Assembler::instr_at(pc_ + (7 * Assembler::kInstrSize)); |
| 344 | #else |
| 345 | Instr binstr = Assembler::instr_at(pc_ + 4 * Assembler::kInstrSize); |
| 346 | #endif |
| 347 | bool patched_return = |
| 348 | ((instr0 & kOpcodeMask) == ADDIS && (instr1 & kOpcodeMask) == ORI && |
| 349 | #if V8_TARGET_ARCH_PPC64 |
| 350 | (instr3 & kOpcodeMask) == ORIS && (instr4 & kOpcodeMask) == ORI && |
| 351 | #endif |
| 352 | (binstr == 0x7d821008)); // twge r2, r2 |
| 353 | |
| 354 | // printf("IsPatchedReturnSequence: %d\n", patched_return); |
| 355 | return patched_return; |
| 356 | } |
| 357 | |
| 358 | |
| 359 | bool RelocInfo::IsPatchedDebugBreakSlotSequence() { |
| 360 | Instr current_instr = Assembler::instr_at(pc_); |
| 361 | return !Assembler::IsNop(current_instr, Assembler::DEBUG_BREAK_NOP); |
| 362 | } |
| 363 | |
| 364 | |
| 365 | void RelocInfo::Visit(Isolate* isolate, ObjectVisitor* visitor) { |
| 366 | RelocInfo::Mode mode = rmode(); |
| 367 | if (mode == RelocInfo::EMBEDDED_OBJECT) { |
| 368 | visitor->VisitEmbeddedPointer(this); |
| 369 | } else if (RelocInfo::IsCodeTarget(mode)) { |
| 370 | visitor->VisitCodeTarget(this); |
| 371 | } else if (mode == RelocInfo::CELL) { |
| 372 | visitor->VisitCell(this); |
| 373 | } else if (mode == RelocInfo::EXTERNAL_REFERENCE) { |
| 374 | visitor->VisitExternalReference(this); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 375 | } else if (mode == RelocInfo::INTERNAL_REFERENCE || |
| 376 | mode == RelocInfo::INTERNAL_REFERENCE_ENCODED) { |
| 377 | visitor->VisitInternalReference(this); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 378 | } else if (RelocInfo::IsCodeAgeSequence(mode)) { |
| 379 | visitor->VisitCodeAgeSequence(this); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 380 | } else if (RelocInfo::IsDebugBreakSlot(mode) && |
| 381 | IsPatchedDebugBreakSlotSequence()) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 382 | visitor->VisitDebugTarget(this); |
| 383 | } else if (IsRuntimeEntry(mode)) { |
| 384 | visitor->VisitRuntimeEntry(this); |
| 385 | } |
| 386 | } |
| 387 | |
| 388 | |
| 389 | template <typename StaticVisitor> |
| 390 | void RelocInfo::Visit(Heap* heap) { |
| 391 | RelocInfo::Mode mode = rmode(); |
| 392 | if (mode == RelocInfo::EMBEDDED_OBJECT) { |
| 393 | StaticVisitor::VisitEmbeddedPointer(heap, this); |
| 394 | } else if (RelocInfo::IsCodeTarget(mode)) { |
| 395 | StaticVisitor::VisitCodeTarget(heap, this); |
| 396 | } else if (mode == RelocInfo::CELL) { |
| 397 | StaticVisitor::VisitCell(heap, this); |
| 398 | } else if (mode == RelocInfo::EXTERNAL_REFERENCE) { |
| 399 | StaticVisitor::VisitExternalReference(this); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 400 | } else if (mode == RelocInfo::INTERNAL_REFERENCE || |
| 401 | mode == RelocInfo::INTERNAL_REFERENCE_ENCODED) { |
| 402 | StaticVisitor::VisitInternalReference(this); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 403 | } else if (RelocInfo::IsCodeAgeSequence(mode)) { |
| 404 | StaticVisitor::VisitCodeAgeSequence(heap, this); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 405 | } else if (RelocInfo::IsDebugBreakSlot(mode) && |
| 406 | IsPatchedDebugBreakSlotSequence()) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 407 | StaticVisitor::VisitDebugTarget(heap, this); |
| 408 | } else if (IsRuntimeEntry(mode)) { |
| 409 | StaticVisitor::VisitRuntimeEntry(this); |
| 410 | } |
| 411 | } |
| 412 | |
| 413 | Operand::Operand(intptr_t immediate, RelocInfo::Mode rmode) { |
| 414 | rm_ = no_reg; |
| 415 | imm_ = immediate; |
| 416 | rmode_ = rmode; |
| 417 | } |
| 418 | |
| 419 | Operand::Operand(const ExternalReference& f) { |
| 420 | rm_ = no_reg; |
| 421 | imm_ = reinterpret_cast<intptr_t>(f.address()); |
| 422 | rmode_ = RelocInfo::EXTERNAL_REFERENCE; |
| 423 | } |
| 424 | |
| 425 | Operand::Operand(Smi* value) { |
| 426 | rm_ = no_reg; |
| 427 | imm_ = reinterpret_cast<intptr_t>(value); |
| 428 | rmode_ = kRelocInfo_NONEPTR; |
| 429 | } |
| 430 | |
| 431 | Operand::Operand(Register rm) { |
| 432 | rm_ = rm; |
| 433 | rmode_ = kRelocInfo_NONEPTR; // PPC -why doesn't ARM do this? |
| 434 | } |
| 435 | |
| 436 | void Assembler::CheckBuffer() { |
| 437 | if (buffer_space() <= kGap) { |
| 438 | GrowBuffer(); |
| 439 | } |
| 440 | } |
| 441 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 442 | void Assembler::TrackBranch() { |
| 443 | DCHECK(!trampoline_emitted_); |
| 444 | int count = tracked_branch_count_++; |
| 445 | if (count == 0) { |
| 446 | // We leave space (kMaxBlockTrampolineSectionSize) |
| 447 | // for BlockTrampolinePoolScope buffer. |
| 448 | next_trampoline_check_ = |
| 449 | pc_offset() + kMaxCondBranchReach - kMaxBlockTrampolineSectionSize; |
| 450 | } else { |
| 451 | next_trampoline_check_ -= kTrampolineSlotsSize; |
| 452 | } |
| 453 | } |
| 454 | |
| 455 | void Assembler::UntrackBranch() { |
| 456 | DCHECK(!trampoline_emitted_); |
| 457 | DCHECK(tracked_branch_count_ > 0); |
| 458 | int count = --tracked_branch_count_; |
| 459 | if (count == 0) { |
| 460 | // Reset |
| 461 | next_trampoline_check_ = kMaxInt; |
| 462 | } else { |
| 463 | next_trampoline_check_ += kTrampolineSlotsSize; |
| 464 | } |
| 465 | } |
| 466 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 467 | void Assembler::CheckTrampolinePoolQuick() { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 468 | if (pc_offset() >= next_trampoline_check_) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 469 | CheckTrampolinePool(); |
| 470 | } |
| 471 | } |
| 472 | |
| 473 | void Assembler::emit(Instr x) { |
| 474 | CheckBuffer(); |
| 475 | *reinterpret_cast<Instr*>(pc_) = x; |
| 476 | pc_ += kInstrSize; |
| 477 | CheckTrampolinePoolQuick(); |
| 478 | } |
| 479 | |
| 480 | bool Operand::is_reg() const { return rm_.is_valid(); } |
| 481 | |
| 482 | |
| 483 | // Fetch the 32bit value from the FIXED_SEQUENCE lis/ori |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 484 | Address Assembler::target_address_at(Address pc, Address constant_pool) { |
| 485 | if (FLAG_enable_embedded_constant_pool && constant_pool) { |
| 486 | ConstantPoolEntry::Access access; |
| 487 | if (IsConstantPoolLoadStart(pc, &access)) |
| 488 | return Memory::Address_at(target_constant_pool_address_at( |
| 489 | pc, constant_pool, access, ConstantPoolEntry::INTPTR)); |
| 490 | } |
| 491 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 492 | Instr instr1 = instr_at(pc); |
| 493 | Instr instr2 = instr_at(pc + kInstrSize); |
| 494 | // Interpret 2 instructions generated by lis/ori |
| 495 | if (IsLis(instr1) && IsOri(instr2)) { |
| 496 | #if V8_TARGET_ARCH_PPC64 |
| 497 | Instr instr4 = instr_at(pc + (3 * kInstrSize)); |
| 498 | Instr instr5 = instr_at(pc + (4 * kInstrSize)); |
| 499 | // Assemble the 64 bit value. |
| 500 | uint64_t hi = (static_cast<uint32_t>((instr1 & kImm16Mask) << 16) | |
| 501 | static_cast<uint32_t>(instr2 & kImm16Mask)); |
| 502 | uint64_t lo = (static_cast<uint32_t>((instr4 & kImm16Mask) << 16) | |
| 503 | static_cast<uint32_t>(instr5 & kImm16Mask)); |
| 504 | return reinterpret_cast<Address>((hi << 32) | lo); |
| 505 | #else |
| 506 | // Assemble the 32 bit value. |
| 507 | return reinterpret_cast<Address>(((instr1 & kImm16Mask) << 16) | |
| 508 | (instr2 & kImm16Mask)); |
| 509 | #endif |
| 510 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 511 | |
| 512 | UNREACHABLE(); |
| 513 | return NULL; |
| 514 | } |
| 515 | |
| 516 | |
| 517 | #if V8_TARGET_ARCH_PPC64 |
| 518 | const int kLoadIntptrOpcode = LD; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 519 | #else |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 520 | const int kLoadIntptrOpcode = LWZ; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 521 | #endif |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 522 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 523 | // Constant pool load sequence detection: |
| 524 | // 1) REGULAR access: |
| 525 | // load <dst>, kConstantPoolRegister + <offset> |
| 526 | // |
| 527 | // 2) OVERFLOWED access: |
| 528 | // addis <scratch>, kConstantPoolRegister, <offset_high> |
| 529 | // load <dst>, <scratch> + <offset_low> |
| 530 | bool Assembler::IsConstantPoolLoadStart(Address pc, |
| 531 | ConstantPoolEntry::Access* access) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 532 | Instr instr = instr_at(pc); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 533 | int opcode = instr & kOpcodeMask; |
| 534 | if (!GetRA(instr).is(kConstantPoolRegister)) return false; |
| 535 | bool overflowed = (opcode == ADDIS); |
| 536 | #ifdef DEBUG |
| 537 | if (overflowed) { |
| 538 | opcode = instr_at(pc + kInstrSize) & kOpcodeMask; |
| 539 | } |
| 540 | DCHECK(opcode == kLoadIntptrOpcode || opcode == LFD); |
| 541 | #endif |
| 542 | if (access) { |
| 543 | *access = (overflowed ? ConstantPoolEntry::OVERFLOWED |
| 544 | : ConstantPoolEntry::REGULAR); |
| 545 | } |
| 546 | return true; |
| 547 | } |
| 548 | |
| 549 | |
| 550 | bool Assembler::IsConstantPoolLoadEnd(Address pc, |
| 551 | ConstantPoolEntry::Access* access) { |
| 552 | Instr instr = instr_at(pc); |
| 553 | int opcode = instr & kOpcodeMask; |
| 554 | bool overflowed = false; |
| 555 | if (!(opcode == kLoadIntptrOpcode || opcode == LFD)) return false; |
| 556 | if (!GetRA(instr).is(kConstantPoolRegister)) { |
| 557 | instr = instr_at(pc - kInstrSize); |
| 558 | opcode = instr & kOpcodeMask; |
| 559 | if ((opcode != ADDIS) || !GetRA(instr).is(kConstantPoolRegister)) { |
| 560 | return false; |
| 561 | } |
| 562 | overflowed = true; |
| 563 | } |
| 564 | if (access) { |
| 565 | *access = (overflowed ? ConstantPoolEntry::OVERFLOWED |
| 566 | : ConstantPoolEntry::REGULAR); |
| 567 | } |
| 568 | return true; |
| 569 | } |
| 570 | |
| 571 | |
| 572 | int Assembler::GetConstantPoolOffset(Address pc, |
| 573 | ConstantPoolEntry::Access access, |
| 574 | ConstantPoolEntry::Type type) { |
| 575 | bool overflowed = (access == ConstantPoolEntry::OVERFLOWED); |
| 576 | #ifdef DEBUG |
| 577 | ConstantPoolEntry::Access access_check = |
| 578 | static_cast<ConstantPoolEntry::Access>(-1); |
| 579 | DCHECK(IsConstantPoolLoadStart(pc, &access_check)); |
| 580 | DCHECK(access_check == access); |
| 581 | #endif |
| 582 | int offset; |
| 583 | if (overflowed) { |
| 584 | offset = (instr_at(pc) & kImm16Mask) << 16; |
| 585 | offset += SIGN_EXT_IMM16(instr_at(pc + kInstrSize) & kImm16Mask); |
| 586 | DCHECK(!is_int16(offset)); |
| 587 | } else { |
| 588 | offset = SIGN_EXT_IMM16((instr_at(pc) & kImm16Mask)); |
| 589 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 590 | return offset; |
| 591 | } |
| 592 | |
| 593 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 594 | void Assembler::PatchConstantPoolAccessInstruction( |
| 595 | int pc_offset, int offset, ConstantPoolEntry::Access access, |
| 596 | ConstantPoolEntry::Type type) { |
| 597 | Address pc = buffer_ + pc_offset; |
| 598 | bool overflowed = (access == ConstantPoolEntry::OVERFLOWED); |
| 599 | CHECK(overflowed != is_int16(offset)); |
| 600 | #ifdef DEBUG |
| 601 | ConstantPoolEntry::Access access_check = |
| 602 | static_cast<ConstantPoolEntry::Access>(-1); |
| 603 | DCHECK(IsConstantPoolLoadStart(pc, &access_check)); |
| 604 | DCHECK(access_check == access); |
| 605 | #endif |
| 606 | if (overflowed) { |
| 607 | int hi_word = static_cast<int>(offset >> 16); |
| 608 | int lo_word = static_cast<int>(offset & 0xffff); |
| 609 | if (lo_word & 0x8000) hi_word++; |
| 610 | |
| 611 | Instr instr1 = instr_at(pc); |
| 612 | Instr instr2 = instr_at(pc + kInstrSize); |
| 613 | instr1 &= ~kImm16Mask; |
| 614 | instr1 |= (hi_word & kImm16Mask); |
| 615 | instr2 &= ~kImm16Mask; |
| 616 | instr2 |= (lo_word & kImm16Mask); |
| 617 | instr_at_put(pc, instr1); |
| 618 | instr_at_put(pc + kInstrSize, instr2); |
| 619 | } else { |
| 620 | Instr instr = instr_at(pc); |
| 621 | instr &= ~kImm16Mask; |
| 622 | instr |= (offset & kImm16Mask); |
| 623 | instr_at_put(pc, instr); |
| 624 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 625 | } |
| 626 | |
| 627 | |
| 628 | Address Assembler::target_constant_pool_address_at( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 629 | Address pc, Address constant_pool, ConstantPoolEntry::Access access, |
| 630 | ConstantPoolEntry::Type type) { |
| 631 | Address addr = constant_pool; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 632 | DCHECK(addr); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 633 | addr += GetConstantPoolOffset(pc, access, type); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 634 | return addr; |
| 635 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 636 | |
| 637 | |
| 638 | // This sets the branch destination (which gets loaded at the call address). |
| 639 | // This is for calls and branches within generated code. The serializer |
| 640 | // has already deserialized the mov instructions etc. |
| 641 | // There is a FIXED_SEQUENCE assumption here |
| 642 | void Assembler::deserialization_set_special_target_at( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 643 | Isolate* isolate, Address instruction_payload, Code* code, Address target) { |
| 644 | set_target_address_at(isolate, instruction_payload, code, target); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 645 | } |
| 646 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 647 | |
| 648 | void Assembler::deserialization_set_target_internal_reference_at( |
| 649 | Isolate* isolate, Address pc, Address target, RelocInfo::Mode mode) { |
| 650 | if (RelocInfo::IsInternalReferenceEncoded(mode)) { |
| 651 | Code* code = NULL; |
| 652 | set_target_address_at(isolate, pc, code, target, SKIP_ICACHE_FLUSH); |
| 653 | } else { |
| 654 | Memory::Address_at(pc) = target; |
| 655 | } |
| 656 | } |
| 657 | |
| 658 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 659 | // This code assumes the FIXED_SEQUENCE of lis/ori |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 660 | void Assembler::set_target_address_at(Isolate* isolate, Address pc, |
| 661 | Address constant_pool, Address target, |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 662 | ICacheFlushMode icache_flush_mode) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 663 | if (FLAG_enable_embedded_constant_pool && constant_pool) { |
| 664 | ConstantPoolEntry::Access access; |
| 665 | if (IsConstantPoolLoadStart(pc, &access)) { |
| 666 | Memory::Address_at(target_constant_pool_address_at( |
| 667 | pc, constant_pool, access, ConstantPoolEntry::INTPTR)) = target; |
| 668 | return; |
| 669 | } |
| 670 | } |
| 671 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 672 | Instr instr1 = instr_at(pc); |
| 673 | Instr instr2 = instr_at(pc + kInstrSize); |
| 674 | // Interpret 2 instructions generated by lis/ori |
| 675 | if (IsLis(instr1) && IsOri(instr2)) { |
| 676 | #if V8_TARGET_ARCH_PPC64 |
| 677 | Instr instr4 = instr_at(pc + (3 * kInstrSize)); |
| 678 | Instr instr5 = instr_at(pc + (4 * kInstrSize)); |
| 679 | // Needs to be fixed up when mov changes to handle 64-bit values. |
| 680 | uint32_t* p = reinterpret_cast<uint32_t*>(pc); |
| 681 | uintptr_t itarget = reinterpret_cast<uintptr_t>(target); |
| 682 | |
| 683 | instr5 &= ~kImm16Mask; |
| 684 | instr5 |= itarget & kImm16Mask; |
| 685 | itarget = itarget >> 16; |
| 686 | |
| 687 | instr4 &= ~kImm16Mask; |
| 688 | instr4 |= itarget & kImm16Mask; |
| 689 | itarget = itarget >> 16; |
| 690 | |
| 691 | instr2 &= ~kImm16Mask; |
| 692 | instr2 |= itarget & kImm16Mask; |
| 693 | itarget = itarget >> 16; |
| 694 | |
| 695 | instr1 &= ~kImm16Mask; |
| 696 | instr1 |= itarget & kImm16Mask; |
| 697 | itarget = itarget >> 16; |
| 698 | |
| 699 | *p = instr1; |
| 700 | *(p + 1) = instr2; |
| 701 | *(p + 3) = instr4; |
| 702 | *(p + 4) = instr5; |
| 703 | if (icache_flush_mode != SKIP_ICACHE_FLUSH) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 704 | Assembler::FlushICache(isolate, p, 5 * kInstrSize); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 705 | } |
| 706 | #else |
| 707 | uint32_t* p = reinterpret_cast<uint32_t*>(pc); |
| 708 | uint32_t itarget = reinterpret_cast<uint32_t>(target); |
| 709 | int lo_word = itarget & kImm16Mask; |
| 710 | int hi_word = itarget >> 16; |
| 711 | instr1 &= ~kImm16Mask; |
| 712 | instr1 |= hi_word; |
| 713 | instr2 &= ~kImm16Mask; |
| 714 | instr2 |= lo_word; |
| 715 | |
| 716 | *p = instr1; |
| 717 | *(p + 1) = instr2; |
| 718 | if (icache_flush_mode != SKIP_ICACHE_FLUSH) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 719 | Assembler::FlushICache(isolate, p, 2 * kInstrSize); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 720 | } |
| 721 | #endif |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 722 | return; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 723 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 724 | UNREACHABLE(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 725 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 726 | } // namespace internal |
| 727 | } // namespace v8 |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 728 | |
| 729 | #endif // V8_PPC_ASSEMBLER_PPC_INL_H_ |