Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 4 | |
| 5 | #ifndef V8_X64_ASSEMBLER_X64_INL_H_ |
| 6 | #define V8_X64_ASSEMBLER_X64_INL_H_ |
| 7 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 8 | #include "src/x64/assembler-x64.h" |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 9 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 10 | #include "src/base/cpu.h" |
| 11 | #include "src/debug.h" |
| 12 | #include "src/v8memory.h" |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 13 | |
| 14 | namespace v8 { |
| 15 | namespace internal { |
| 16 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 17 | bool CpuFeatures::SupportsCrankshaft() { return true; } |
| 18 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 19 | |
| 20 | // ----------------------------------------------------------------------------- |
| 21 | // Implementation of Assembler |
| 22 | |
| 23 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 24 | static const byte kCallOpcode = 0xE8; |
| 25 | // The length of pushq(rbp), movp(rbp, rsp), Push(rsi) and Push(rdi). |
| 26 | static const int kNoCodeAgeSequenceLength = kPointerSize == kInt64Size ? 6 : 17; |
| 27 | |
| 28 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 29 | void Assembler::emitl(uint32_t x) { |
| 30 | Memory::uint32_at(pc_) = x; |
| 31 | pc_ += sizeof(uint32_t); |
| 32 | } |
| 33 | |
| 34 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 35 | void Assembler::emitp(void* x, RelocInfo::Mode rmode) { |
| 36 | uintptr_t value = reinterpret_cast<uintptr_t>(x); |
| 37 | Memory::uintptr_at(pc_) = value; |
| 38 | if (!RelocInfo::IsNone(rmode)) { |
| 39 | RecordRelocInfo(rmode, value); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 40 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 41 | pc_ += sizeof(uintptr_t); |
| 42 | } |
| 43 | |
| 44 | |
| 45 | void Assembler::emitq(uint64_t x) { |
| 46 | Memory::uint64_at(pc_) = x; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 47 | pc_ += sizeof(uint64_t); |
| 48 | } |
| 49 | |
| 50 | |
| 51 | void Assembler::emitw(uint16_t x) { |
| 52 | Memory::uint16_at(pc_) = x; |
| 53 | pc_ += sizeof(uint16_t); |
| 54 | } |
| 55 | |
| 56 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 57 | void Assembler::emit_code_target(Handle<Code> target, |
| 58 | RelocInfo::Mode rmode, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 59 | TypeFeedbackId ast_id) { |
| 60 | DCHECK(RelocInfo::IsCodeTarget(rmode) || |
| 61 | rmode == RelocInfo::CODE_AGE_SEQUENCE); |
| 62 | if (rmode == RelocInfo::CODE_TARGET && !ast_id.IsNone()) { |
| 63 | RecordRelocInfo(RelocInfo::CODE_TARGET_WITH_ID, ast_id.ToInt()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 64 | } else { |
| 65 | RecordRelocInfo(rmode); |
| 66 | } |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 67 | int current = code_targets_.length(); |
| 68 | if (current > 0 && code_targets_.last().is_identical_to(target)) { |
| 69 | // Optimization if we keep jumping to the same code target. |
| 70 | emitl(current - 1); |
| 71 | } else { |
| 72 | code_targets_.Add(target); |
| 73 | emitl(current); |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 78 | void Assembler::emit_runtime_entry(Address entry, RelocInfo::Mode rmode) { |
| 79 | DCHECK(RelocInfo::IsRuntimeEntry(rmode)); |
| 80 | RecordRelocInfo(rmode); |
| 81 | emitl(static_cast<uint32_t>(entry - isolate()->code_range()->start())); |
| 82 | } |
| 83 | |
| 84 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 85 | void Assembler::emit_rex_64(Register reg, Register rm_reg) { |
| 86 | emit(0x48 | reg.high_bit() << 2 | rm_reg.high_bit()); |
| 87 | } |
| 88 | |
| 89 | |
| 90 | void Assembler::emit_rex_64(XMMRegister reg, Register rm_reg) { |
| 91 | emit(0x48 | (reg.code() & 0x8) >> 1 | rm_reg.code() >> 3); |
| 92 | } |
| 93 | |
| 94 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 95 | void Assembler::emit_rex_64(Register reg, XMMRegister rm_reg) { |
| 96 | emit(0x48 | (reg.code() & 0x8) >> 1 | rm_reg.code() >> 3); |
| 97 | } |
| 98 | |
| 99 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 100 | void Assembler::emit_rex_64(Register reg, const Operand& op) { |
| 101 | emit(0x48 | reg.high_bit() << 2 | op.rex_); |
| 102 | } |
| 103 | |
| 104 | |
| 105 | void Assembler::emit_rex_64(XMMRegister reg, const Operand& op) { |
| 106 | emit(0x48 | (reg.code() & 0x8) >> 1 | op.rex_); |
| 107 | } |
| 108 | |
| 109 | |
| 110 | void Assembler::emit_rex_64(Register rm_reg) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 111 | DCHECK_EQ(rm_reg.code() & 0xf, rm_reg.code()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 112 | emit(0x48 | rm_reg.high_bit()); |
| 113 | } |
| 114 | |
| 115 | |
| 116 | void Assembler::emit_rex_64(const Operand& op) { |
| 117 | emit(0x48 | op.rex_); |
| 118 | } |
| 119 | |
| 120 | |
| 121 | void Assembler::emit_rex_32(Register reg, Register rm_reg) { |
| 122 | emit(0x40 | reg.high_bit() << 2 | rm_reg.high_bit()); |
| 123 | } |
| 124 | |
| 125 | |
| 126 | void Assembler::emit_rex_32(Register reg, const Operand& op) { |
| 127 | emit(0x40 | reg.high_bit() << 2 | op.rex_); |
| 128 | } |
| 129 | |
| 130 | |
| 131 | void Assembler::emit_rex_32(Register rm_reg) { |
| 132 | emit(0x40 | rm_reg.high_bit()); |
| 133 | } |
| 134 | |
| 135 | |
| 136 | void Assembler::emit_rex_32(const Operand& op) { |
| 137 | emit(0x40 | op.rex_); |
| 138 | } |
| 139 | |
| 140 | |
| 141 | void Assembler::emit_optional_rex_32(Register reg, Register rm_reg) { |
| 142 | byte rex_bits = reg.high_bit() << 2 | rm_reg.high_bit(); |
| 143 | if (rex_bits != 0) emit(0x40 | rex_bits); |
| 144 | } |
| 145 | |
| 146 | |
| 147 | void Assembler::emit_optional_rex_32(Register reg, const Operand& op) { |
| 148 | byte rex_bits = reg.high_bit() << 2 | op.rex_; |
| 149 | if (rex_bits != 0) emit(0x40 | rex_bits); |
| 150 | } |
| 151 | |
| 152 | |
| 153 | void Assembler::emit_optional_rex_32(XMMRegister reg, const Operand& op) { |
| 154 | byte rex_bits = (reg.code() & 0x8) >> 1 | op.rex_; |
| 155 | if (rex_bits != 0) emit(0x40 | rex_bits); |
| 156 | } |
| 157 | |
| 158 | |
| 159 | void Assembler::emit_optional_rex_32(XMMRegister reg, XMMRegister base) { |
| 160 | byte rex_bits = (reg.code() & 0x8) >> 1 | (base.code() & 0x8) >> 3; |
| 161 | if (rex_bits != 0) emit(0x40 | rex_bits); |
| 162 | } |
| 163 | |
| 164 | |
| 165 | void Assembler::emit_optional_rex_32(XMMRegister reg, Register base) { |
| 166 | byte rex_bits = (reg.code() & 0x8) >> 1 | (base.code() & 0x8) >> 3; |
| 167 | if (rex_bits != 0) emit(0x40 | rex_bits); |
| 168 | } |
| 169 | |
| 170 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 171 | void Assembler::emit_optional_rex_32(Register reg, XMMRegister base) { |
| 172 | byte rex_bits = (reg.code() & 0x8) >> 1 | (base.code() & 0x8) >> 3; |
| 173 | if (rex_bits != 0) emit(0x40 | rex_bits); |
| 174 | } |
| 175 | |
| 176 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 177 | void Assembler::emit_optional_rex_32(Register rm_reg) { |
| 178 | if (rm_reg.high_bit()) emit(0x41); |
| 179 | } |
| 180 | |
| 181 | |
| 182 | void Assembler::emit_optional_rex_32(const Operand& op) { |
| 183 | if (op.rex_ != 0) emit(0x40 | op.rex_); |
| 184 | } |
| 185 | |
| 186 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 187 | Address Assembler::target_address_at(Address pc, |
| 188 | ConstantPoolArray* constant_pool) { |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 189 | return Memory::int32_at(pc) + pc + 4; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 193 | void Assembler::set_target_address_at(Address pc, |
| 194 | ConstantPoolArray* constant_pool, |
| 195 | Address target, |
| 196 | ICacheFlushMode icache_flush_mode) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 197 | Memory::int32_at(pc) = static_cast<int32_t>(target - pc - 4); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 198 | if (icache_flush_mode != SKIP_ICACHE_FLUSH) { |
| 199 | CpuFeatures::FlushICache(pc, sizeof(int32_t)); |
| 200 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 201 | } |
| 202 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 203 | |
| 204 | Address Assembler::target_address_from_return_address(Address pc) { |
| 205 | return pc - kCallTargetAddressOffset; |
| 206 | } |
| 207 | |
| 208 | |
| 209 | Address Assembler::break_address_from_return_address(Address pc) { |
| 210 | return pc - Assembler::kPatchDebugBreakSlotReturnOffset; |
| 211 | } |
| 212 | |
| 213 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 214 | Handle<Object> Assembler::code_target_object_handle_at(Address pc) { |
| 215 | return code_targets_[Memory::int32_at(pc)]; |
| 216 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 217 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 218 | |
| 219 | Address Assembler::runtime_entry_at(Address pc) { |
| 220 | return Memory::int32_at(pc) + isolate()->code_range()->start(); |
| 221 | } |
| 222 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 223 | // ----------------------------------------------------------------------------- |
| 224 | // Implementation of RelocInfo |
| 225 | |
| 226 | // The modes possibly affected by apply must be in kApplyMask. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 227 | void RelocInfo::apply(intptr_t delta, ICacheFlushMode icache_flush_mode) { |
| 228 | bool flush_icache = icache_flush_mode != SKIP_ICACHE_FLUSH; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 229 | if (IsInternalReference(rmode_)) { |
| 230 | // absolute code pointer inside code object moves with the code object. |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 231 | Memory::Address_at(pc_) += static_cast<int32_t>(delta); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 232 | if (flush_icache) CpuFeatures::FlushICache(pc_, sizeof(Address)); |
| 233 | } else if (IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 234 | Memory::int32_at(pc_) -= static_cast<int32_t>(delta); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 235 | if (flush_icache) CpuFeatures::FlushICache(pc_, sizeof(int32_t)); |
| 236 | } else if (rmode_ == CODE_AGE_SEQUENCE) { |
| 237 | if (*pc_ == kCallOpcode) { |
| 238 | int32_t* p = reinterpret_cast<int32_t*>(pc_ + 1); |
| 239 | *p -= static_cast<int32_t>(delta); // Relocate entry. |
| 240 | if (flush_icache) CpuFeatures::FlushICache(p, sizeof(uint32_t)); |
| 241 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 242 | } |
| 243 | } |
| 244 | |
| 245 | |
| 246 | Address RelocInfo::target_address() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 247 | DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)); |
| 248 | return Assembler::target_address_at(pc_, host_); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 249 | } |
| 250 | |
| 251 | |
| 252 | Address RelocInfo::target_address_address() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 253 | DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_) |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 254 | || rmode_ == EMBEDDED_OBJECT |
| 255 | || rmode_ == EXTERNAL_REFERENCE); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 256 | return reinterpret_cast<Address>(pc_); |
| 257 | } |
| 258 | |
| 259 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 260 | Address RelocInfo::constant_pool_entry_address() { |
| 261 | UNREACHABLE(); |
| 262 | return NULL; |
| 263 | } |
| 264 | |
| 265 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 266 | int RelocInfo::target_address_size() { |
| 267 | if (IsCodedSpecially()) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 268 | return Assembler::kSpecialTargetSize; |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 269 | } else { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 270 | return kPointerSize; |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 271 | } |
| 272 | } |
| 273 | |
| 274 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 275 | void RelocInfo::set_target_address(Address target, |
| 276 | WriteBarrierMode write_barrier_mode, |
| 277 | ICacheFlushMode icache_flush_mode) { |
| 278 | DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)); |
| 279 | Assembler::set_target_address_at(pc_, host_, target, icache_flush_mode); |
| 280 | if (write_barrier_mode == UPDATE_WRITE_BARRIER && host() != NULL && |
| 281 | IsCodeTarget(rmode_)) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 282 | Object* target_code = Code::GetCodeFromTargetAddress(target); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 283 | host()->GetHeap()->incremental_marking()->RecordWriteIntoCode( |
| 284 | host(), this, HeapObject::cast(target_code)); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 285 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 286 | } |
| 287 | |
| 288 | |
| 289 | Object* RelocInfo::target_object() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 290 | DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 291 | return Memory::Object_at(pc_); |
| 292 | } |
| 293 | |
| 294 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 295 | Handle<Object> RelocInfo::target_object_handle(Assembler* origin) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 296 | DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 297 | if (rmode_ == EMBEDDED_OBJECT) { |
| 298 | return Memory::Object_Handle_at(pc_); |
| 299 | } else { |
| 300 | return origin->code_target_object_handle_at(pc_); |
| 301 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 302 | } |
| 303 | |
| 304 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 305 | Address RelocInfo::target_reference() { |
| 306 | DCHECK(rmode_ == RelocInfo::EXTERNAL_REFERENCE); |
| 307 | return Memory::Address_at(pc_); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 308 | } |
| 309 | |
| 310 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 311 | void RelocInfo::set_target_object(Object* target, |
| 312 | WriteBarrierMode write_barrier_mode, |
| 313 | ICacheFlushMode icache_flush_mode) { |
| 314 | DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 315 | Memory::Object_at(pc_) = target; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 316 | if (icache_flush_mode != SKIP_ICACHE_FLUSH) { |
| 317 | CpuFeatures::FlushICache(pc_, sizeof(Address)); |
| 318 | } |
| 319 | if (write_barrier_mode == UPDATE_WRITE_BARRIER && |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 320 | host() != NULL && |
| 321 | target->IsHeapObject()) { |
| 322 | host()->GetHeap()->incremental_marking()->RecordWrite( |
| 323 | host(), &Memory::Object_at(pc_), HeapObject::cast(target)); |
| 324 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 325 | } |
| 326 | |
| 327 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 328 | Address RelocInfo::target_runtime_entry(Assembler* origin) { |
| 329 | DCHECK(IsRuntimeEntry(rmode_)); |
| 330 | return origin->runtime_entry_at(pc_); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 331 | } |
| 332 | |
| 333 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 334 | void RelocInfo::set_target_runtime_entry(Address target, |
| 335 | WriteBarrierMode write_barrier_mode, |
| 336 | ICacheFlushMode icache_flush_mode) { |
| 337 | DCHECK(IsRuntimeEntry(rmode_)); |
| 338 | if (target_address() != target) { |
| 339 | set_target_address(target, write_barrier_mode, icache_flush_mode); |
| 340 | } |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 341 | } |
| 342 | |
| 343 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 344 | Handle<Cell> RelocInfo::target_cell_handle() { |
| 345 | DCHECK(rmode_ == RelocInfo::CELL); |
| 346 | Address address = Memory::Address_at(pc_); |
| 347 | return Handle<Cell>(reinterpret_cast<Cell**>(address)); |
| 348 | } |
| 349 | |
| 350 | |
| 351 | Cell* RelocInfo::target_cell() { |
| 352 | DCHECK(rmode_ == RelocInfo::CELL); |
| 353 | return Cell::FromValueAddress(Memory::Address_at(pc_)); |
| 354 | } |
| 355 | |
| 356 | |
| 357 | void RelocInfo::set_target_cell(Cell* cell, |
| 358 | WriteBarrierMode write_barrier_mode, |
| 359 | ICacheFlushMode icache_flush_mode) { |
| 360 | DCHECK(rmode_ == RelocInfo::CELL); |
| 361 | Address address = cell->address() + Cell::kValueOffset; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 362 | Memory::Address_at(pc_) = address; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 363 | if (icache_flush_mode != SKIP_ICACHE_FLUSH) { |
| 364 | CpuFeatures::FlushICache(pc_, sizeof(Address)); |
| 365 | } |
| 366 | if (write_barrier_mode == UPDATE_WRITE_BARRIER && |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 367 | host() != NULL) { |
| 368 | // TODO(1550) We are passing NULL as a slot because cell can never be on |
| 369 | // evacuation candidate. |
| 370 | host()->GetHeap()->incremental_marking()->RecordWrite( |
| 371 | host(), NULL, cell); |
| 372 | } |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 373 | } |
| 374 | |
| 375 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 376 | void RelocInfo::WipeOut() { |
| 377 | if (IsEmbeddedObject(rmode_) || IsExternalReference(rmode_)) { |
| 378 | Memory::Address_at(pc_) = NULL; |
| 379 | } else if (IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)) { |
| 380 | // Effectively write zero into the relocation. |
| 381 | Assembler::set_target_address_at(pc_, host_, pc_ + sizeof(int32_t)); |
| 382 | } else { |
| 383 | UNREACHABLE(); |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 388 | bool RelocInfo::IsPatchedReturnSequence() { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 389 | // The recognized call sequence is: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 390 | // movq(kScratchRegister, address); call(kScratchRegister); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 391 | // It only needs to be distinguished from a return sequence |
| 392 | // movq(rsp, rbp); pop(rbp); ret(n); int3 *6 |
| 393 | // The 11th byte is int3 (0xCC) in the return sequence and |
| 394 | // REX.WB (0x48+register bit) for the call sequence. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 395 | return pc_[Assembler::kMoveAddressIntoScratchRegisterInstructionLength] != |
| 396 | 0xCC; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 397 | } |
| 398 | |
| 399 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 400 | bool RelocInfo::IsPatchedDebugBreakSlotSequence() { |
| 401 | return !Assembler::IsNop(pc()); |
| 402 | } |
| 403 | |
| 404 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 405 | Handle<Object> RelocInfo::code_age_stub_handle(Assembler* origin) { |
| 406 | DCHECK(rmode_ == RelocInfo::CODE_AGE_SEQUENCE); |
| 407 | DCHECK(*pc_ == kCallOpcode); |
| 408 | return origin->code_target_object_handle_at(pc_ + 1); |
| 409 | } |
| 410 | |
| 411 | |
| 412 | Code* RelocInfo::code_age_stub() { |
| 413 | DCHECK(rmode_ == RelocInfo::CODE_AGE_SEQUENCE); |
| 414 | DCHECK(*pc_ == kCallOpcode); |
| 415 | return Code::GetCodeFromTargetAddress( |
| 416 | Assembler::target_address_at(pc_ + 1, host_)); |
| 417 | } |
| 418 | |
| 419 | |
| 420 | void RelocInfo::set_code_age_stub(Code* stub, |
| 421 | ICacheFlushMode icache_flush_mode) { |
| 422 | DCHECK(*pc_ == kCallOpcode); |
| 423 | DCHECK(rmode_ == RelocInfo::CODE_AGE_SEQUENCE); |
| 424 | Assembler::set_target_address_at(pc_ + 1, host_, stub->instruction_start(), |
| 425 | icache_flush_mode); |
| 426 | } |
| 427 | |
| 428 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 429 | Address RelocInfo::call_address() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 430 | DCHECK((IsJSReturn(rmode()) && IsPatchedReturnSequence()) || |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 431 | (IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence())); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 432 | return Memory::Address_at( |
| 433 | pc_ + Assembler::kRealPatchReturnSequenceAddressOffset); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 434 | } |
| 435 | |
| 436 | |
| 437 | void RelocInfo::set_call_address(Address target) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 438 | DCHECK((IsJSReturn(rmode()) && IsPatchedReturnSequence()) || |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 439 | (IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence())); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 440 | Memory::Address_at(pc_ + Assembler::kRealPatchReturnSequenceAddressOffset) = |
| 441 | target; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 442 | CpuFeatures::FlushICache( |
| 443 | pc_ + Assembler::kRealPatchReturnSequenceAddressOffset, sizeof(Address)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 444 | if (host() != NULL) { |
| 445 | Object* target_code = Code::GetCodeFromTargetAddress(target); |
| 446 | host()->GetHeap()->incremental_marking()->RecordWriteIntoCode( |
| 447 | host(), this, HeapObject::cast(target_code)); |
| 448 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 449 | } |
| 450 | |
| 451 | |
| 452 | Object* RelocInfo::call_object() { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 453 | return *call_object_address(); |
| 454 | } |
| 455 | |
| 456 | |
| 457 | void RelocInfo::set_call_object(Object* target) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 458 | *call_object_address() = target; |
| 459 | } |
| 460 | |
| 461 | |
| 462 | Object** RelocInfo::call_object_address() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 463 | DCHECK((IsJSReturn(rmode()) && IsPatchedReturnSequence()) || |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 464 | (IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence())); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 465 | return reinterpret_cast<Object**>( |
| 466 | pc_ + Assembler::kPatchReturnSequenceAddressOffset); |
| 467 | } |
| 468 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 469 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 470 | void RelocInfo::Visit(Isolate* isolate, ObjectVisitor* visitor) { |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 471 | RelocInfo::Mode mode = rmode(); |
| 472 | if (mode == RelocInfo::EMBEDDED_OBJECT) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 473 | visitor->VisitEmbeddedPointer(this); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 474 | CpuFeatures::FlushICache(pc_, sizeof(Address)); |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 475 | } else if (RelocInfo::IsCodeTarget(mode)) { |
| 476 | visitor->VisitCodeTarget(this); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 477 | } else if (mode == RelocInfo::CELL) { |
| 478 | visitor->VisitCell(this); |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 479 | } else if (mode == RelocInfo::EXTERNAL_REFERENCE) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 480 | visitor->VisitExternalReference(this); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 481 | CpuFeatures::FlushICache(pc_, sizeof(Address)); |
| 482 | } else if (RelocInfo::IsCodeAgeSequence(mode)) { |
| 483 | visitor->VisitCodeAgeSequence(this); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 484 | } else if (((RelocInfo::IsJSReturn(mode) && |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 485 | IsPatchedReturnSequence()) || |
| 486 | (RelocInfo::IsDebugBreakSlot(mode) && |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 487 | IsPatchedDebugBreakSlotSequence())) && |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 488 | isolate->debug()->has_break_points()) { |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 489 | visitor->VisitDebugTarget(this); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 490 | } else if (RelocInfo::IsRuntimeEntry(mode)) { |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 491 | visitor->VisitRuntimeEntry(this); |
| 492 | } |
| 493 | } |
| 494 | |
| 495 | |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 496 | template<typename StaticVisitor> |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 497 | void RelocInfo::Visit(Heap* heap) { |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 498 | RelocInfo::Mode mode = rmode(); |
| 499 | if (mode == RelocInfo::EMBEDDED_OBJECT) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 500 | StaticVisitor::VisitEmbeddedPointer(heap, this); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 501 | CpuFeatures::FlushICache(pc_, sizeof(Address)); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 502 | } else if (RelocInfo::IsCodeTarget(mode)) { |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 503 | StaticVisitor::VisitCodeTarget(heap, this); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 504 | } else if (mode == RelocInfo::CELL) { |
| 505 | StaticVisitor::VisitCell(heap, this); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 506 | } else if (mode == RelocInfo::EXTERNAL_REFERENCE) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 507 | StaticVisitor::VisitExternalReference(this); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 508 | CpuFeatures::FlushICache(pc_, sizeof(Address)); |
| 509 | } else if (RelocInfo::IsCodeAgeSequence(mode)) { |
| 510 | StaticVisitor::VisitCodeAgeSequence(heap, this); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 511 | } else if (heap->isolate()->debug()->has_break_points() && |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 512 | ((RelocInfo::IsJSReturn(mode) && |
| 513 | IsPatchedReturnSequence()) || |
| 514 | (RelocInfo::IsDebugBreakSlot(mode) && |
| 515 | IsPatchedDebugBreakSlotSequence()))) { |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 516 | StaticVisitor::VisitDebugTarget(heap, this); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 517 | } else if (RelocInfo::IsRuntimeEntry(mode)) { |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 518 | StaticVisitor::VisitRuntimeEntry(this); |
| 519 | } |
| 520 | } |
| 521 | |
| 522 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 523 | // ----------------------------------------------------------------------------- |
| 524 | // Implementation of Operand |
| 525 | |
| 526 | void Operand::set_modrm(int mod, Register rm_reg) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 527 | DCHECK(is_uint2(mod)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 528 | buf_[0] = mod << 6 | rm_reg.low_bits(); |
| 529 | // Set REX.B to the high bit of rm.code(). |
| 530 | rex_ |= rm_reg.high_bit(); |
| 531 | } |
| 532 | |
| 533 | |
| 534 | void Operand::set_sib(ScaleFactor scale, Register index, Register base) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 535 | DCHECK(len_ == 1); |
| 536 | DCHECK(is_uint2(scale)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 537 | // Use SIB with no index register only for base rsp or r12. Otherwise we |
| 538 | // would skip the SIB byte entirely. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 539 | DCHECK(!index.is(rsp) || base.is(rsp) || base.is(r12)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 540 | buf_[1] = (scale << 6) | (index.low_bits() << 3) | base.low_bits(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 541 | rex_ |= index.high_bit() << 1 | base.high_bit(); |
| 542 | len_ = 2; |
| 543 | } |
| 544 | |
| 545 | void Operand::set_disp8(int disp) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 546 | DCHECK(is_int8(disp)); |
| 547 | DCHECK(len_ == 1 || len_ == 2); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 548 | int8_t* p = reinterpret_cast<int8_t*>(&buf_[len_]); |
| 549 | *p = disp; |
| 550 | len_ += sizeof(int8_t); |
| 551 | } |
| 552 | |
| 553 | void Operand::set_disp32(int disp) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 554 | DCHECK(len_ == 1 || len_ == 2); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 555 | int32_t* p = reinterpret_cast<int32_t*>(&buf_[len_]); |
| 556 | *p = disp; |
| 557 | len_ += sizeof(int32_t); |
| 558 | } |
| 559 | |
| 560 | |
| 561 | } } // namespace v8::internal |
| 562 | |
| 563 | #endif // V8_X64_ASSEMBLER_X64_INL_H_ |