Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [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 are |
| 6 | // 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 distribution. |
| 14 | // |
| 15 | // - Neither the name of Sun Microsystems or the names of contributors may |
| 16 | // be used to endorse or promote products derived from this software without |
| 17 | // specific prior written permission. |
| 18 | // |
| 19 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| 20 | // IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| 21 | // THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| 23 | // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 24 | // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 25 | // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 26 | // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 27 | // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 28 | // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 29 | // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 30 | |
| 31 | // The original source code covered by the above license above has been |
| 32 | // modified significantly by Google Inc. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 33 | // Copyright 2012 the V8 project authors. All rights reserved. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 34 | |
| 35 | // A light-weight IA32 Assembler. |
| 36 | |
| 37 | #ifndef V8_IA32_ASSEMBLER_IA32_INL_H_ |
| 38 | #define V8_IA32_ASSEMBLER_IA32_INL_H_ |
| 39 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 40 | #include "src/ia32/assembler-ia32.h" |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 41 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 42 | #include "src/assembler.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 43 | #include "src/debug/debug.h" |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 44 | |
| 45 | namespace v8 { |
| 46 | namespace internal { |
| 47 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 48 | bool CpuFeatures::SupportsCrankshaft() { return true; } |
| 49 | |
| 50 | |
| 51 | static const byte kCallOpcode = 0xE8; |
| 52 | static const int kNoCodeAgeSequenceLength = 5; |
| 53 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 54 | |
| 55 | // The modes possibly affected by apply must be in kApplyMask. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 56 | void RelocInfo::apply(intptr_t delta) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 57 | if (IsRuntimeEntry(rmode_) || IsCodeTarget(rmode_)) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 58 | int32_t* p = reinterpret_cast<int32_t*>(pc_); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 59 | *p -= delta; // Relocate entry. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 60 | } else if (IsCodeAgeSequence(rmode_)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 61 | if (*pc_ == kCallOpcode) { |
| 62 | int32_t* p = reinterpret_cast<int32_t*>(pc_ + 1); |
| 63 | *p -= delta; // Relocate entry. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 64 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 65 | } else if (IsDebugBreakSlot(rmode_) && IsPatchedDebugBreakSlotSequence()) { |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 66 | // Special handling of a debug break slot when a break point is set (call |
| 67 | // instruction has been inserted). |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 68 | int32_t* p = reinterpret_cast<int32_t*>( |
| 69 | pc_ + Assembler::kPatchDebugBreakSlotAddressOffset); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 70 | *p -= delta; // Relocate entry. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 71 | } else if (IsInternalReference(rmode_)) { |
| 72 | // absolute code pointer inside code object moves with the code object. |
| 73 | int32_t* p = reinterpret_cast<int32_t*>(pc_); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 74 | *p += delta; // Relocate entry. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 75 | } |
| 76 | } |
| 77 | |
| 78 | |
| 79 | Address RelocInfo::target_address() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 80 | DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)); |
| 81 | return Assembler::target_address_at(pc_, host_); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 82 | } |
| 83 | |
| 84 | |
| 85 | Address RelocInfo::target_address_address() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 86 | DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_) |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 87 | || rmode_ == EMBEDDED_OBJECT |
| 88 | || rmode_ == EXTERNAL_REFERENCE); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 89 | return reinterpret_cast<Address>(pc_); |
| 90 | } |
| 91 | |
| 92 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 93 | Address RelocInfo::constant_pool_entry_address() { |
| 94 | UNREACHABLE(); |
| 95 | return NULL; |
| 96 | } |
| 97 | |
| 98 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 99 | int RelocInfo::target_address_size() { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 100 | return Assembler::kSpecialTargetSize; |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 101 | } |
| 102 | |
| 103 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 104 | void RelocInfo::set_target_address(Address target, |
| 105 | WriteBarrierMode write_barrier_mode, |
| 106 | ICacheFlushMode icache_flush_mode) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 107 | Assembler::set_target_address_at(isolate_, pc_, host_, target, |
| 108 | icache_flush_mode); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 109 | DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)); |
| 110 | if (write_barrier_mode == UPDATE_WRITE_BARRIER && host() != NULL && |
| 111 | IsCodeTarget(rmode_)) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 112 | Object* target_code = Code::GetCodeFromTargetAddress(target); |
| 113 | host()->GetHeap()->incremental_marking()->RecordWriteIntoCode( |
| 114 | host(), this, HeapObject::cast(target_code)); |
| 115 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 116 | } |
| 117 | |
| 118 | |
| 119 | Object* RelocInfo::target_object() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 120 | DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 121 | return Memory::Object_at(pc_); |
| 122 | } |
| 123 | |
| 124 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 125 | Handle<Object> RelocInfo::target_object_handle(Assembler* origin) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 126 | DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 127 | return Memory::Object_Handle_at(pc_); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 128 | } |
| 129 | |
| 130 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 131 | void RelocInfo::set_target_object(Object* target, |
| 132 | WriteBarrierMode write_barrier_mode, |
| 133 | ICacheFlushMode icache_flush_mode) { |
| 134 | DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 135 | Memory::Object_at(pc_) = target; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 136 | if (icache_flush_mode != SKIP_ICACHE_FLUSH) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 137 | Assembler::FlushICache(isolate_, pc_, sizeof(Address)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 138 | } |
| 139 | if (write_barrier_mode == UPDATE_WRITE_BARRIER && |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 140 | host() != NULL && |
| 141 | target->IsHeapObject()) { |
| 142 | host()->GetHeap()->incremental_marking()->RecordWrite( |
| 143 | host(), &Memory::Object_at(pc_), HeapObject::cast(target)); |
| 144 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 145 | } |
| 146 | |
| 147 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 148 | Address RelocInfo::target_external_reference() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 149 | DCHECK(rmode_ == RelocInfo::EXTERNAL_REFERENCE); |
| 150 | return Memory::Address_at(pc_); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 151 | } |
| 152 | |
| 153 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 154 | Address RelocInfo::target_internal_reference() { |
| 155 | DCHECK(rmode_ == INTERNAL_REFERENCE); |
| 156 | return Memory::Address_at(pc_); |
| 157 | } |
| 158 | |
| 159 | |
| 160 | Address RelocInfo::target_internal_reference_address() { |
| 161 | DCHECK(rmode_ == INTERNAL_REFERENCE); |
| 162 | return reinterpret_cast<Address>(pc_); |
| 163 | } |
| 164 | |
| 165 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 166 | Address RelocInfo::target_runtime_entry(Assembler* origin) { |
| 167 | DCHECK(IsRuntimeEntry(rmode_)); |
| 168 | return reinterpret_cast<Address>(*reinterpret_cast<int32_t*>(pc_)); |
| 169 | } |
| 170 | |
| 171 | |
| 172 | void RelocInfo::set_target_runtime_entry(Address target, |
| 173 | WriteBarrierMode write_barrier_mode, |
| 174 | ICacheFlushMode icache_flush_mode) { |
| 175 | DCHECK(IsRuntimeEntry(rmode_)); |
| 176 | if (target_address() != target) { |
| 177 | set_target_address(target, write_barrier_mode, icache_flush_mode); |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | |
| 182 | Handle<Cell> RelocInfo::target_cell_handle() { |
| 183 | DCHECK(rmode_ == RelocInfo::CELL); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 184 | Address address = Memory::Address_at(pc_); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 185 | return Handle<Cell>(reinterpret_cast<Cell**>(address)); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 186 | } |
| 187 | |
| 188 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 189 | Cell* RelocInfo::target_cell() { |
| 190 | DCHECK(rmode_ == RelocInfo::CELL); |
| 191 | return Cell::FromValueAddress(Memory::Address_at(pc_)); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 192 | } |
| 193 | |
| 194 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 195 | void RelocInfo::set_target_cell(Cell* cell, |
| 196 | WriteBarrierMode write_barrier_mode, |
| 197 | ICacheFlushMode icache_flush_mode) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 198 | DCHECK(cell->IsCell()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 199 | DCHECK(rmode_ == RelocInfo::CELL); |
| 200 | Address address = cell->address() + Cell::kValueOffset; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 201 | Memory::Address_at(pc_) = address; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 202 | if (icache_flush_mode != SKIP_ICACHE_FLUSH) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 203 | Assembler::FlushICache(isolate_, pc_, sizeof(Address)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 204 | } |
| 205 | if (write_barrier_mode == UPDATE_WRITE_BARRIER && host() != NULL) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 206 | host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(host(), this, |
| 207 | cell); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 208 | } |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 209 | } |
| 210 | |
| 211 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 212 | Handle<Object> RelocInfo::code_age_stub_handle(Assembler* origin) { |
| 213 | DCHECK(rmode_ == RelocInfo::CODE_AGE_SEQUENCE); |
| 214 | DCHECK(*pc_ == kCallOpcode); |
| 215 | return Memory::Object_Handle_at(pc_ + 1); |
| 216 | } |
| 217 | |
| 218 | |
| 219 | Code* RelocInfo::code_age_stub() { |
| 220 | DCHECK(rmode_ == RelocInfo::CODE_AGE_SEQUENCE); |
| 221 | DCHECK(*pc_ == kCallOpcode); |
| 222 | return Code::GetCodeFromTargetAddress( |
| 223 | Assembler::target_address_at(pc_ + 1, host_)); |
| 224 | } |
| 225 | |
| 226 | |
| 227 | void RelocInfo::set_code_age_stub(Code* stub, |
| 228 | ICacheFlushMode icache_flush_mode) { |
| 229 | DCHECK(*pc_ == kCallOpcode); |
| 230 | DCHECK(rmode_ == RelocInfo::CODE_AGE_SEQUENCE); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 231 | Assembler::set_target_address_at( |
| 232 | isolate_, pc_ + 1, host_, stub->instruction_start(), icache_flush_mode); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 233 | } |
| 234 | |
| 235 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 236 | Address RelocInfo::debug_call_address() { |
| 237 | DCHECK(IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence()); |
| 238 | Address location = pc_ + Assembler::kPatchDebugBreakSlotAddressOffset; |
| 239 | return Assembler::target_address_at(location, host_); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 240 | } |
| 241 | |
| 242 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 243 | void RelocInfo::set_debug_call_address(Address target) { |
| 244 | DCHECK(IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence()); |
| 245 | Address location = pc_ + Assembler::kPatchDebugBreakSlotAddressOffset; |
| 246 | Assembler::set_target_address_at(isolate_, location, host_, target); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 247 | if (host() != NULL) { |
| 248 | Object* target_code = Code::GetCodeFromTargetAddress(target); |
| 249 | host()->GetHeap()->incremental_marking()->RecordWriteIntoCode( |
| 250 | host(), this, HeapObject::cast(target_code)); |
| 251 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 255 | void RelocInfo::WipeOut() { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 256 | if (IsEmbeddedObject(rmode_) || IsExternalReference(rmode_) || |
| 257 | IsInternalReference(rmode_)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 258 | Memory::Address_at(pc_) = NULL; |
| 259 | } else if (IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)) { |
| 260 | // Effectively write zero into the relocation. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 261 | Assembler::set_target_address_at(isolate_, pc_, host_, |
| 262 | pc_ + sizeof(int32_t)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 263 | } else { |
| 264 | UNREACHABLE(); |
| 265 | } |
| 266 | } |
| 267 | |
| 268 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 269 | void RelocInfo::Visit(Isolate* isolate, ObjectVisitor* visitor) { |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 270 | RelocInfo::Mode mode = rmode(); |
| 271 | if (mode == RelocInfo::EMBEDDED_OBJECT) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 272 | visitor->VisitEmbeddedPointer(this); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 273 | Assembler::FlushICache(isolate, pc_, sizeof(Address)); |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 274 | } else if (RelocInfo::IsCodeTarget(mode)) { |
| 275 | visitor->VisitCodeTarget(this); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 276 | } else if (mode == RelocInfo::CELL) { |
| 277 | visitor->VisitCell(this); |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 278 | } else if (mode == RelocInfo::EXTERNAL_REFERENCE) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 279 | visitor->VisitExternalReference(this); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 280 | } else if (mode == RelocInfo::INTERNAL_REFERENCE) { |
| 281 | visitor->VisitInternalReference(this); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 282 | } else if (RelocInfo::IsCodeAgeSequence(mode)) { |
| 283 | visitor->VisitCodeAgeSequence(this); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 284 | } else if (RelocInfo::IsDebugBreakSlot(mode) && |
| 285 | IsPatchedDebugBreakSlotSequence()) { |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 286 | visitor->VisitDebugTarget(this); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 287 | } else if (IsRuntimeEntry(mode)) { |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 288 | visitor->VisitRuntimeEntry(this); |
| 289 | } |
| 290 | } |
| 291 | |
| 292 | |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 293 | template<typename StaticVisitor> |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 294 | void RelocInfo::Visit(Heap* heap) { |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 295 | RelocInfo::Mode mode = rmode(); |
| 296 | if (mode == RelocInfo::EMBEDDED_OBJECT) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 297 | StaticVisitor::VisitEmbeddedPointer(heap, this); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 298 | Assembler::FlushICache(heap->isolate(), pc_, sizeof(Address)); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 299 | } else if (RelocInfo::IsCodeTarget(mode)) { |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 300 | StaticVisitor::VisitCodeTarget(heap, this); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 301 | } else if (mode == RelocInfo::CELL) { |
| 302 | StaticVisitor::VisitCell(heap, this); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 303 | } else if (mode == RelocInfo::EXTERNAL_REFERENCE) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 304 | StaticVisitor::VisitExternalReference(this); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 305 | } else if (mode == RelocInfo::INTERNAL_REFERENCE) { |
| 306 | StaticVisitor::VisitInternalReference(this); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 307 | } else if (RelocInfo::IsCodeAgeSequence(mode)) { |
| 308 | StaticVisitor::VisitCodeAgeSequence(heap, this); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 309 | } else if (RelocInfo::IsDebugBreakSlot(mode) && |
| 310 | IsPatchedDebugBreakSlotSequence()) { |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 311 | StaticVisitor::VisitDebugTarget(heap, this); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 312 | } else if (IsRuntimeEntry(mode)) { |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 313 | StaticVisitor::VisitRuntimeEntry(this); |
| 314 | } |
| 315 | } |
| 316 | |
| 317 | |
| 318 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 319 | Immediate::Immediate(int x) { |
| 320 | x_ = x; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 321 | rmode_ = RelocInfo::NONE32; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 322 | } |
| 323 | |
| 324 | |
| 325 | Immediate::Immediate(const ExternalReference& ext) { |
| 326 | x_ = reinterpret_cast<int32_t>(ext.address()); |
| 327 | rmode_ = RelocInfo::EXTERNAL_REFERENCE; |
| 328 | } |
| 329 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 330 | |
| 331 | Immediate::Immediate(Label* internal_offset) { |
| 332 | x_ = reinterpret_cast<int32_t>(internal_offset); |
| 333 | rmode_ = RelocInfo::INTERNAL_REFERENCE; |
| 334 | } |
| 335 | |
| 336 | |
| 337 | Immediate::Immediate(Handle<Object> handle) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 338 | AllowDeferredHandleDereference using_raw_address; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 339 | // Verify all Objects referred by code are NOT in new space. |
| 340 | Object* obj = *handle; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 341 | if (obj->IsHeapObject()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 342 | DCHECK(!HeapObject::cast(obj)->GetHeap()->InNewSpace(obj)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 343 | x_ = reinterpret_cast<intptr_t>(handle.location()); |
| 344 | rmode_ = RelocInfo::EMBEDDED_OBJECT; |
| 345 | } else { |
| 346 | // no relocation needed |
| 347 | x_ = reinterpret_cast<intptr_t>(obj); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 348 | rmode_ = RelocInfo::NONE32; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 349 | } |
| 350 | } |
| 351 | |
| 352 | |
| 353 | Immediate::Immediate(Smi* value) { |
| 354 | x_ = reinterpret_cast<intptr_t>(value); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 355 | rmode_ = RelocInfo::NONE32; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 356 | } |
| 357 | |
| 358 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 359 | Immediate::Immediate(Address addr) { |
| 360 | x_ = reinterpret_cast<int32_t>(addr); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 361 | rmode_ = RelocInfo::NONE32; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 362 | } |
| 363 | |
| 364 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 365 | void Assembler::emit(uint32_t x) { |
| 366 | *reinterpret_cast<uint32_t*>(pc_) = x; |
| 367 | pc_ += sizeof(uint32_t); |
| 368 | } |
| 369 | |
| 370 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 371 | void Assembler::emit_q(uint64_t x) { |
| 372 | *reinterpret_cast<uint64_t*>(pc_) = x; |
| 373 | pc_ += sizeof(uint64_t); |
| 374 | } |
| 375 | |
| 376 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 377 | void Assembler::emit(Handle<Object> handle) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 378 | AllowDeferredHandleDereference heap_object_check; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 379 | // Verify all Objects referred by code are NOT in new space. |
| 380 | Object* obj = *handle; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 381 | DCHECK(!isolate()->heap()->InNewSpace(obj)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 382 | if (obj->IsHeapObject()) { |
| 383 | emit(reinterpret_cast<intptr_t>(handle.location()), |
| 384 | RelocInfo::EMBEDDED_OBJECT); |
| 385 | } else { |
| 386 | // no relocation needed |
| 387 | emit(reinterpret_cast<intptr_t>(obj)); |
| 388 | } |
| 389 | } |
| 390 | |
| 391 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 392 | void Assembler::emit(uint32_t x, RelocInfo::Mode rmode, TypeFeedbackId id) { |
| 393 | if (rmode == RelocInfo::CODE_TARGET && !id.IsNone()) { |
| 394 | RecordRelocInfo(RelocInfo::CODE_TARGET_WITH_ID, id.ToInt()); |
| 395 | } else if (!RelocInfo::IsNone(rmode) |
| 396 | && rmode != RelocInfo::CODE_AGE_SEQUENCE) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 397 | RecordRelocInfo(rmode); |
| 398 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 399 | emit(x); |
| 400 | } |
| 401 | |
| 402 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 403 | void Assembler::emit(Handle<Code> code, |
| 404 | RelocInfo::Mode rmode, |
| 405 | TypeFeedbackId id) { |
| 406 | AllowDeferredHandleDereference embedding_raw_address; |
| 407 | emit(reinterpret_cast<intptr_t>(code.location()), rmode, id); |
| 408 | } |
| 409 | |
| 410 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 411 | void Assembler::emit(const Immediate& x) { |
| 412 | if (x.rmode_ == RelocInfo::INTERNAL_REFERENCE) { |
| 413 | Label* label = reinterpret_cast<Label*>(x.x_); |
| 414 | emit_code_relative_offset(label); |
| 415 | return; |
| 416 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 417 | if (!RelocInfo::IsNone(x.rmode_)) RecordRelocInfo(x.rmode_); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 418 | emit(x.x_); |
| 419 | } |
| 420 | |
| 421 | |
| 422 | void Assembler::emit_code_relative_offset(Label* label) { |
| 423 | if (label->is_bound()) { |
| 424 | int32_t pos; |
| 425 | pos = label->pos() + Code::kHeaderSize - kHeapObjectTag; |
| 426 | emit(pos); |
| 427 | } else { |
| 428 | emit_disp(label, Displacement::CODE_RELATIVE); |
| 429 | } |
| 430 | } |
| 431 | |
| 432 | |
| 433 | void Assembler::emit_w(const Immediate& x) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 434 | DCHECK(RelocInfo::IsNone(x.rmode_)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 435 | uint16_t value = static_cast<uint16_t>(x.x_); |
| 436 | reinterpret_cast<uint16_t*>(pc_)[0] = value; |
| 437 | pc_ += sizeof(uint16_t); |
| 438 | } |
| 439 | |
| 440 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 441 | Address Assembler::target_address_at(Address pc, Address constant_pool) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 442 | return pc + sizeof(int32_t) + *reinterpret_cast<int32_t*>(pc); |
| 443 | } |
| 444 | |
| 445 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 446 | void Assembler::set_target_address_at(Isolate* isolate, Address pc, |
| 447 | Address constant_pool, Address target, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 448 | ICacheFlushMode icache_flush_mode) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 449 | int32_t* p = reinterpret_cast<int32_t*>(pc); |
| 450 | *p = target - (pc + sizeof(int32_t)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 451 | if (icache_flush_mode != SKIP_ICACHE_FLUSH) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 452 | Assembler::FlushICache(isolate, p, sizeof(int32_t)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 453 | } |
| 454 | } |
| 455 | |
| 456 | |
| 457 | Address Assembler::target_address_from_return_address(Address pc) { |
| 458 | return pc - kCallTargetAddressOffset; |
| 459 | } |
| 460 | |
| 461 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 462 | Displacement Assembler::disp_at(Label* L) { |
| 463 | return Displacement(long_at(L->pos())); |
| 464 | } |
| 465 | |
| 466 | |
| 467 | void Assembler::disp_at_put(Label* L, Displacement disp) { |
| 468 | long_at_put(L->pos(), disp.data()); |
| 469 | } |
| 470 | |
| 471 | |
| 472 | void Assembler::emit_disp(Label* L, Displacement::Type type) { |
| 473 | Displacement disp(L, type); |
| 474 | L->link_to(pc_offset()); |
| 475 | emit(static_cast<int>(disp.data())); |
| 476 | } |
| 477 | |
| 478 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 479 | void Assembler::emit_near_disp(Label* L) { |
| 480 | byte disp = 0x00; |
| 481 | if (L->is_near_linked()) { |
| 482 | int offset = L->near_link_pos() - pc_offset(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 483 | DCHECK(is_int8(offset)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 484 | disp = static_cast<byte>(offset & 0xFF); |
| 485 | } |
| 486 | L->link_to(pc_offset(), Label::kNear); |
| 487 | *pc_++ = disp; |
| 488 | } |
| 489 | |
| 490 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 491 | void Assembler::deserialization_set_target_internal_reference_at( |
| 492 | Isolate* isolate, Address pc, Address target, RelocInfo::Mode mode) { |
| 493 | Memory::Address_at(pc) = target; |
| 494 | } |
| 495 | |
| 496 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 497 | void Operand::set_modrm(int mod, Register rm) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 498 | DCHECK((mod & -4) == 0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 499 | buf_[0] = mod << 6 | rm.code(); |
| 500 | len_ = 1; |
| 501 | } |
| 502 | |
| 503 | |
| 504 | void Operand::set_sib(ScaleFactor scale, Register index, Register base) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 505 | DCHECK(len_ == 1); |
| 506 | DCHECK((scale & -4) == 0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 507 | // Use SIB with no index register only for base esp. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 508 | DCHECK(!index.is(esp) || base.is(esp)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 509 | buf_[1] = scale << 6 | index.code() << 3 | base.code(); |
| 510 | len_ = 2; |
| 511 | } |
| 512 | |
| 513 | |
| 514 | void Operand::set_disp8(int8_t disp) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 515 | DCHECK(len_ == 1 || len_ == 2); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 516 | *reinterpret_cast<int8_t*>(&buf_[len_++]) = disp; |
| 517 | } |
| 518 | |
| 519 | |
| 520 | void Operand::set_dispr(int32_t disp, RelocInfo::Mode rmode) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 521 | DCHECK(len_ == 1 || len_ == 2); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 522 | int32_t* p = reinterpret_cast<int32_t*>(&buf_[len_]); |
| 523 | *p = disp; |
| 524 | len_ += sizeof(int32_t); |
| 525 | rmode_ = rmode; |
| 526 | } |
| 527 | |
| 528 | Operand::Operand(Register reg) { |
| 529 | // reg |
| 530 | set_modrm(3, reg); |
| 531 | } |
| 532 | |
| 533 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 534 | Operand::Operand(XMMRegister xmm_reg) { |
| 535 | Register reg = { xmm_reg.code() }; |
| 536 | set_modrm(3, reg); |
| 537 | } |
| 538 | |
| 539 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 540 | Operand::Operand(int32_t disp, RelocInfo::Mode rmode) { |
| 541 | // [disp/r] |
| 542 | set_modrm(0, ebp); |
| 543 | set_dispr(disp, rmode); |
| 544 | } |
| 545 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 546 | |
| 547 | Operand::Operand(Immediate imm) { |
| 548 | // [disp/r] |
| 549 | set_modrm(0, ebp); |
| 550 | set_dispr(imm.x_, imm.rmode_); |
| 551 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 552 | } // namespace internal |
| 553 | } // namespace v8 |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 554 | |
| 555 | #endif // V8_IA32_ASSEMBLER_IA32_INL_H_ |