ager@chromium.org | 5ec4892 | 2009-05-05 07:25:34 +0000 | [diff] [blame] | 1 | // Copyright 2009 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 28 | #include "v8.h" |
| 29 | |
| 30 | #include "bootstrapper.h" |
| 31 | #include "codegen-inl.h" |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 32 | #include "assembler-x64.h" |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 33 | #include "macro-assembler-x64.h" |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 34 | #include "debug.h" |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 35 | |
| 36 | namespace v8 { |
| 37 | namespace internal { |
| 38 | |
| 39 | MacroAssembler::MacroAssembler(void* buffer, int size) |
| 40 | : Assembler(buffer, size), |
| 41 | unresolved_(0), |
| 42 | generating_stub_(false), |
| 43 | allow_stub_calls_(true), |
| 44 | code_object_(Heap::undefined_value()) { |
| 45 | } |
| 46 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 47 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 48 | // TODO(x64): For now, the write barrier is disabled on x64 and we |
| 49 | // therefore generate no code. This should be fixed when the write |
| 50 | // barrier is enabled. |
| 51 | void MacroAssembler::RecordWrite(Register object, int offset, |
| 52 | Register value, Register scratch) { |
| 53 | } |
| 54 | |
| 55 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 56 | void MacroAssembler::Assert(Condition cc, const char* msg) { |
| 57 | if (FLAG_debug_code) Check(cc, msg); |
| 58 | } |
| 59 | |
| 60 | |
| 61 | void MacroAssembler::Check(Condition cc, const char* msg) { |
| 62 | Label L; |
| 63 | j(cc, &L); |
| 64 | Abort(msg); |
| 65 | // will not return here |
| 66 | bind(&L); |
| 67 | } |
| 68 | |
| 69 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 70 | void MacroAssembler::NegativeZeroTest(Register result, |
| 71 | Register op, |
| 72 | Label* then_label) { |
| 73 | Label ok; |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame^] | 74 | testl(result, result); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 75 | j(not_zero, &ok); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame^] | 76 | testl(op, op); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 77 | j(sign, then_label); |
| 78 | bind(&ok); |
| 79 | } |
| 80 | |
| 81 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 82 | void MacroAssembler::Abort(const char* msg) { |
| 83 | // We want to pass the msg string like a smi to avoid GC |
| 84 | // problems, however msg is not guaranteed to be aligned |
| 85 | // properly. Instead, we pass an aligned pointer that is |
| 86 | // a proper v8 smi, but also pass the alignment difference |
| 87 | // from the real pointer as a smi. |
| 88 | intptr_t p1 = reinterpret_cast<intptr_t>(msg); |
| 89 | intptr_t p0 = (p1 & ~kSmiTagMask) + kSmiTag; |
| 90 | // Note: p0 might not be a valid Smi *value*, but it has a valid Smi tag. |
| 91 | ASSERT(reinterpret_cast<Object*>(p0)->IsSmi()); |
| 92 | #ifdef DEBUG |
| 93 | if (msg != NULL) { |
| 94 | RecordComment("Abort message: "); |
| 95 | RecordComment(msg); |
| 96 | } |
| 97 | #endif |
| 98 | push(rax); |
| 99 | movq(kScratchRegister, p0, RelocInfo::NONE); |
| 100 | push(kScratchRegister); |
| 101 | movq(kScratchRegister, |
| 102 | reinterpret_cast<intptr_t>(Smi::FromInt(p1 - p0)), |
| 103 | RelocInfo::NONE); |
| 104 | push(kScratchRegister); |
| 105 | CallRuntime(Runtime::kAbort, 2); |
| 106 | // will not return here |
| 107 | } |
| 108 | |
| 109 | |
| 110 | void MacroAssembler::CallStub(CodeStub* stub) { |
| 111 | ASSERT(allow_stub_calls()); // calls are not allowed in some stubs |
| 112 | movq(kScratchRegister, stub->GetCode(), RelocInfo::CODE_TARGET); |
| 113 | call(kScratchRegister); |
| 114 | } |
| 115 | |
| 116 | |
| 117 | void MacroAssembler::StubReturn(int argc) { |
| 118 | ASSERT(argc >= 1 && generating_stub()); |
| 119 | ret((argc - 1) * kPointerSize); |
| 120 | } |
| 121 | |
| 122 | |
| 123 | void MacroAssembler::IllegalOperation(int num_arguments) { |
| 124 | if (num_arguments > 0) { |
| 125 | addq(rsp, Immediate(num_arguments * kPointerSize)); |
| 126 | } |
| 127 | movq(rax, Factory::undefined_value(), RelocInfo::EMBEDDED_OBJECT); |
| 128 | } |
| 129 | |
| 130 | |
| 131 | void MacroAssembler::CallRuntime(Runtime::FunctionId id, int num_arguments) { |
| 132 | CallRuntime(Runtime::FunctionForId(id), num_arguments); |
| 133 | } |
| 134 | |
| 135 | |
| 136 | void MacroAssembler::CallRuntime(Runtime::Function* f, int num_arguments) { |
| 137 | // If the expected number of arguments of the runtime function is |
| 138 | // constant, we check that the actual number of arguments match the |
| 139 | // expectation. |
| 140 | if (f->nargs >= 0 && f->nargs != num_arguments) { |
| 141 | IllegalOperation(num_arguments); |
| 142 | return; |
| 143 | } |
| 144 | |
| 145 | Runtime::FunctionId function_id = |
| 146 | static_cast<Runtime::FunctionId>(f->stub_id); |
| 147 | RuntimeStub stub(function_id, num_arguments); |
| 148 | CallStub(&stub); |
| 149 | } |
| 150 | |
| 151 | |
| 152 | void MacroAssembler::TailCallRuntime(ExternalReference const& ext, |
| 153 | int num_arguments) { |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame^] | 154 | // ----------- S t a t e ------------- |
| 155 | // -- rsp[0] : return address |
| 156 | // -- rsp[8] : argument num_arguments - 1 |
| 157 | // ... |
| 158 | // -- rsp[8 * num_arguments] : argument 0 (receiver) |
| 159 | // ----------------------------------- |
| 160 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 161 | // TODO(1236192): Most runtime routines don't need the number of |
| 162 | // arguments passed in because it is constant. At some point we |
| 163 | // should remove this need and make the runtime routine entry code |
| 164 | // smarter. |
| 165 | movq(rax, Immediate(num_arguments)); |
| 166 | JumpToBuiltin(ext); |
| 167 | } |
| 168 | |
| 169 | |
| 170 | void MacroAssembler::JumpToBuiltin(const ExternalReference& ext) { |
| 171 | // Set the entry point and jump to the C entry runtime stub. |
| 172 | movq(rbx, ext); |
| 173 | CEntryStub ces; |
| 174 | movq(kScratchRegister, ces.GetCode(), RelocInfo::CODE_TARGET); |
| 175 | jmp(kScratchRegister); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 176 | } |
| 177 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 178 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 179 | void MacroAssembler::GetBuiltinEntry(Register target, Builtins::JavaScript id) { |
| 180 | bool resolved; |
| 181 | Handle<Code> code = ResolveBuiltin(id, &resolved); |
| 182 | |
| 183 | const char* name = Builtins::GetName(id); |
| 184 | int argc = Builtins::GetArgumentsCount(id); |
| 185 | |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 186 | movq(target, code, RelocInfo::EMBEDDED_OBJECT); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 187 | if (!resolved) { |
| 188 | uint32_t flags = |
| 189 | Bootstrapper::FixupFlagsArgumentsCount::encode(argc) | |
| 190 | Bootstrapper::FixupFlagsIsPCRelative::encode(false) | |
| 191 | Bootstrapper::FixupFlagsUseCodeObject::encode(true); |
| 192 | Unresolved entry = { pc_offset() - sizeof(intptr_t), flags, name }; |
| 193 | unresolved_.Add(entry); |
| 194 | } |
| 195 | addq(target, Immediate(Code::kHeaderSize - kHeapObjectTag)); |
| 196 | } |
| 197 | |
| 198 | |
| 199 | Handle<Code> MacroAssembler::ResolveBuiltin(Builtins::JavaScript id, |
| 200 | bool* resolved) { |
| 201 | // Move the builtin function into the temporary function slot by |
| 202 | // reading it from the builtins object. NOTE: We should be able to |
| 203 | // reduce this to two instructions by putting the function table in |
| 204 | // the global object instead of the "builtins" object and by using a |
| 205 | // real register for the function. |
| 206 | movq(rdx, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 207 | movq(rdx, FieldOperand(rdx, GlobalObject::kBuiltinsOffset)); |
| 208 | int builtins_offset = |
| 209 | JSBuiltinsObject::kJSBuiltinsOffset + (id * kPointerSize); |
| 210 | movq(rdi, FieldOperand(rdx, builtins_offset)); |
| 211 | |
| 212 | |
| 213 | return Builtins::GetCode(id, resolved); |
| 214 | } |
| 215 | |
| 216 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 217 | void MacroAssembler::Set(Register dst, int64_t x) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 218 | if (x == 0) { |
| 219 | xor_(dst, dst); |
| 220 | } else if (is_int32(x)) { |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 221 | movq(dst, Immediate(x)); |
| 222 | } else if (is_uint32(x)) { |
| 223 | movl(dst, Immediate(x)); |
| 224 | } else { |
| 225 | movq(dst, x, RelocInfo::NONE); |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | |
| 230 | void MacroAssembler::Set(const Operand& dst, int64_t x) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 231 | if (x == 0) { |
| 232 | xor_(kScratchRegister, kScratchRegister); |
| 233 | movq(dst, kScratchRegister); |
| 234 | } else if (is_int32(x)) { |
| 235 | movq(dst, Immediate(x)); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 236 | } else if (is_uint32(x)) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 237 | movl(dst, Immediate(x)); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 238 | } else { |
| 239 | movq(kScratchRegister, x, RelocInfo::NONE); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 240 | movq(dst, kScratchRegister); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 241 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 242 | } |
| 243 | |
| 244 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 245 | bool MacroAssembler::IsUnsafeSmi(Smi* value) { |
| 246 | return false; |
| 247 | } |
| 248 | |
| 249 | void MacroAssembler::LoadUnsafeSmi(Register dst, Smi* source) { |
| 250 | UNIMPLEMENTED(); |
| 251 | } |
| 252 | |
| 253 | |
| 254 | void MacroAssembler::Move(Register dst, Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 255 | ASSERT(!source->IsFailure()); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 256 | if (source->IsSmi()) { |
| 257 | if (IsUnsafeSmi(source)) { |
| 258 | LoadUnsafeSmi(dst, source); |
| 259 | } else { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 260 | int32_t smi = static_cast<int32_t>(reinterpret_cast<intptr_t>(*source)); |
| 261 | movq(dst, Immediate(smi)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 262 | } |
| 263 | } else { |
| 264 | movq(dst, source, RelocInfo::EMBEDDED_OBJECT); |
| 265 | } |
| 266 | } |
| 267 | |
| 268 | |
| 269 | void MacroAssembler::Move(const Operand& dst, Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 270 | if (source->IsSmi()) { |
| 271 | int32_t smi = static_cast<int32_t>(reinterpret_cast<intptr_t>(*source)); |
| 272 | movq(dst, Immediate(smi)); |
| 273 | } else { |
| 274 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 275 | movq(dst, kScratchRegister); |
| 276 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 277 | } |
| 278 | |
| 279 | |
| 280 | void MacroAssembler::Cmp(Register dst, Handle<Object> source) { |
| 281 | Move(kScratchRegister, source); |
| 282 | cmpq(dst, kScratchRegister); |
| 283 | } |
| 284 | |
| 285 | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 286 | void MacroAssembler::Cmp(const Operand& dst, Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 287 | if (source->IsSmi()) { |
| 288 | if (IsUnsafeSmi(source)) { |
| 289 | LoadUnsafeSmi(kScratchRegister, source); |
| 290 | cmpl(dst, kScratchRegister); |
| 291 | } else { |
| 292 | // For smi-comparison, it suffices to compare the low 32 bits. |
| 293 | int32_t smi = static_cast<int32_t>(reinterpret_cast<intptr_t>(*source)); |
| 294 | cmpl(dst, Immediate(smi)); |
| 295 | } |
| 296 | } else { |
| 297 | ASSERT(source->IsHeapObject()); |
| 298 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 299 | cmpq(dst, kScratchRegister); |
| 300 | } |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 301 | } |
| 302 | |
| 303 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 304 | void MacroAssembler::Push(Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 305 | if (source->IsSmi()) { |
| 306 | if (IsUnsafeSmi(source)) { |
| 307 | LoadUnsafeSmi(kScratchRegister, source); |
| 308 | push(kScratchRegister); |
| 309 | } else { |
| 310 | int32_t smi = static_cast<int32_t>(reinterpret_cast<intptr_t>(*source)); |
| 311 | push(Immediate(smi)); |
| 312 | } |
| 313 | } else { |
| 314 | ASSERT(source->IsHeapObject()); |
| 315 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 316 | push(kScratchRegister); |
| 317 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 318 | } |
| 319 | |
| 320 | |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame^] | 321 | void MacroAssembler::Push(Smi* source) { |
| 322 | if (IsUnsafeSmi(source)) { |
| 323 | LoadUnsafeSmi(kScratchRegister, source); |
| 324 | push(kScratchRegister); |
| 325 | } else { |
| 326 | int32_t smi = static_cast<int32_t>(reinterpret_cast<intptr_t>(source)); |
| 327 | push(Immediate(smi)); |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 332 | void MacroAssembler::Jump(ExternalReference ext) { |
| 333 | movq(kScratchRegister, ext); |
| 334 | jmp(kScratchRegister); |
| 335 | } |
| 336 | |
| 337 | |
| 338 | void MacroAssembler::Jump(Address destination, RelocInfo::Mode rmode) { |
| 339 | movq(kScratchRegister, destination, rmode); |
| 340 | jmp(kScratchRegister); |
| 341 | } |
| 342 | |
| 343 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 344 | void MacroAssembler::Jump(Handle<Code> code_object, RelocInfo::Mode rmode) { |
| 345 | WriteRecordedPositions(); |
| 346 | ASSERT(RelocInfo::IsCodeTarget(rmode)); |
| 347 | movq(kScratchRegister, code_object, rmode); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 348 | #ifdef DEBUG |
| 349 | Label target; |
| 350 | bind(&target); |
| 351 | #endif |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 352 | jmp(kScratchRegister); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 353 | #ifdef DEBUG |
| 354 | ASSERT_EQ(kTargetAddrToReturnAddrDist, |
| 355 | SizeOfCodeGeneratedSince(&target) + kPointerSize); |
| 356 | #endif |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 357 | } |
| 358 | |
| 359 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 360 | void MacroAssembler::Call(ExternalReference ext) { |
| 361 | movq(kScratchRegister, ext); |
| 362 | call(kScratchRegister); |
| 363 | } |
| 364 | |
| 365 | |
| 366 | void MacroAssembler::Call(Address destination, RelocInfo::Mode rmode) { |
| 367 | movq(kScratchRegister, destination, rmode); |
| 368 | call(kScratchRegister); |
| 369 | } |
| 370 | |
| 371 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 372 | void MacroAssembler::Call(Handle<Code> code_object, RelocInfo::Mode rmode) { |
| 373 | WriteRecordedPositions(); |
| 374 | ASSERT(RelocInfo::IsCodeTarget(rmode)); |
| 375 | movq(kScratchRegister, code_object, rmode); |
| 376 | #ifdef DEBUG |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame^] | 377 | // Patch target is kPointer size bytes *before* target label. |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 378 | Label target; |
| 379 | bind(&target); |
| 380 | #endif |
| 381 | call(kScratchRegister); |
| 382 | #ifdef DEBUG |
| 383 | ASSERT_EQ(kTargetAddrToReturnAddrDist, |
| 384 | SizeOfCodeGeneratedSince(&target) + kPointerSize); |
| 385 | #endif |
| 386 | } |
| 387 | |
| 388 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 389 | void MacroAssembler::PushTryHandler(CodeLocation try_location, |
| 390 | HandlerType type) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 391 | // Adjust this code if not the case. |
| 392 | ASSERT(StackHandlerConstants::kSize == 4 * kPointerSize); |
| 393 | |
| 394 | // The pc (return address) is already on TOS. This code pushes state, |
| 395 | // frame pointer and current handler. Check that they are expected |
| 396 | // next on the stack, in that order. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 397 | ASSERT_EQ(StackHandlerConstants::kStateOffset, |
| 398 | StackHandlerConstants::kPCOffset - kPointerSize); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 399 | ASSERT_EQ(StackHandlerConstants::kFPOffset, |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 400 | StackHandlerConstants::kStateOffset - kPointerSize); |
| 401 | ASSERT_EQ(StackHandlerConstants::kNextOffset, |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 402 | StackHandlerConstants::kFPOffset - kPointerSize); |
| 403 | |
| 404 | if (try_location == IN_JAVASCRIPT) { |
| 405 | if (type == TRY_CATCH_HANDLER) { |
| 406 | push(Immediate(StackHandler::TRY_CATCH)); |
| 407 | } else { |
| 408 | push(Immediate(StackHandler::TRY_FINALLY)); |
| 409 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 410 | push(rbp); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 411 | } else { |
| 412 | ASSERT(try_location == IN_JS_ENTRY); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 413 | // The frame pointer does not point to a JS frame so we save NULL |
| 414 | // for rbp. We expect the code throwing an exception to check rbp |
| 415 | // before dereferencing it to restore the context. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 416 | push(Immediate(StackHandler::ENTRY)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 417 | push(Immediate(0)); // NULL frame pointer. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 418 | } |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 419 | // Save the current handler. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 420 | movq(kScratchRegister, ExternalReference(Top::k_handler_address)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 421 | push(Operand(kScratchRegister, 0)); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 422 | // Link this handler. |
| 423 | movq(Operand(kScratchRegister, 0), rsp); |
| 424 | } |
| 425 | |
| 426 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 427 | void MacroAssembler::Ret() { |
| 428 | ret(0); |
| 429 | } |
| 430 | |
| 431 | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 432 | void MacroAssembler::FCmp() { |
| 433 | fcompp(); |
| 434 | push(rax); |
| 435 | fnstsw_ax(); |
| 436 | // TODO(X64): Check that sahf is safe to use, using CPUProbe. |
| 437 | sahf(); |
| 438 | pop(rax); |
| 439 | } |
| 440 | |
| 441 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 442 | void MacroAssembler::CmpObjectType(Register heap_object, |
| 443 | InstanceType type, |
| 444 | Register map) { |
| 445 | movq(map, FieldOperand(heap_object, HeapObject::kMapOffset)); |
| 446 | CmpInstanceType(map, type); |
| 447 | } |
| 448 | |
| 449 | |
| 450 | void MacroAssembler::CmpInstanceType(Register map, InstanceType type) { |
| 451 | cmpb(FieldOperand(map, Map::kInstanceTypeOffset), |
| 452 | Immediate(static_cast<int8_t>(type))); |
| 453 | } |
| 454 | |
| 455 | |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 456 | void MacroAssembler::TryGetFunctionPrototype(Register function, |
| 457 | Register result, |
| 458 | Label* miss) { |
| 459 | // Check that the receiver isn't a smi. |
| 460 | testl(function, Immediate(kSmiTagMask)); |
| 461 | j(zero, miss); |
| 462 | |
| 463 | // Check that the function really is a function. |
| 464 | CmpObjectType(function, JS_FUNCTION_TYPE, result); |
| 465 | j(not_equal, miss); |
| 466 | |
| 467 | // Make sure that the function has an instance prototype. |
| 468 | Label non_instance; |
| 469 | testb(FieldOperand(result, Map::kBitFieldOffset), |
| 470 | Immediate(1 << Map::kHasNonInstancePrototype)); |
| 471 | j(not_zero, &non_instance); |
| 472 | |
| 473 | // Get the prototype or initial map from the function. |
| 474 | movq(result, |
| 475 | FieldOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
| 476 | |
| 477 | // If the prototype or initial map is the hole, don't return it and |
| 478 | // simply miss the cache instead. This will allow us to allocate a |
| 479 | // prototype object on-demand in the runtime system. |
| 480 | Cmp(result, Factory::the_hole_value()); |
| 481 | j(equal, miss); |
| 482 | |
| 483 | // If the function does not have an initial map, we're done. |
| 484 | Label done; |
| 485 | CmpObjectType(result, MAP_TYPE, kScratchRegister); |
| 486 | j(not_equal, &done); |
| 487 | |
| 488 | // Get the prototype from the initial map. |
| 489 | movq(result, FieldOperand(result, Map::kPrototypeOffset)); |
| 490 | jmp(&done); |
| 491 | |
| 492 | // Non-instance prototype: Fetch prototype from constructor field |
| 493 | // in initial map. |
| 494 | bind(&non_instance); |
| 495 | movq(result, FieldOperand(result, Map::kConstructorOffset)); |
| 496 | |
| 497 | // All done. |
| 498 | bind(&done); |
| 499 | } |
| 500 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 501 | |
| 502 | void MacroAssembler::SetCounter(StatsCounter* counter, int value) { |
| 503 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 504 | movq(kScratchRegister, ExternalReference(counter)); |
| 505 | movl(Operand(kScratchRegister, 0), Immediate(value)); |
| 506 | } |
| 507 | } |
| 508 | |
| 509 | |
| 510 | void MacroAssembler::IncrementCounter(StatsCounter* counter, int value) { |
| 511 | ASSERT(value > 0); |
| 512 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 513 | movq(kScratchRegister, ExternalReference(counter)); |
| 514 | Operand operand(kScratchRegister, 0); |
| 515 | if (value == 1) { |
| 516 | incl(operand); |
| 517 | } else { |
| 518 | addl(operand, Immediate(value)); |
| 519 | } |
| 520 | } |
| 521 | } |
| 522 | |
| 523 | |
| 524 | void MacroAssembler::DecrementCounter(StatsCounter* counter, int value) { |
| 525 | ASSERT(value > 0); |
| 526 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 527 | movq(kScratchRegister, ExternalReference(counter)); |
| 528 | Operand operand(kScratchRegister, 0); |
| 529 | if (value == 1) { |
| 530 | decl(operand); |
| 531 | } else { |
| 532 | subl(operand, Immediate(value)); |
| 533 | } |
| 534 | } |
| 535 | } |
| 536 | |
| 537 | |
| 538 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 539 | |
| 540 | void MacroAssembler::PushRegistersFromMemory(RegList regs) { |
| 541 | ASSERT((regs & ~kJSCallerSaved) == 0); |
| 542 | // Push the content of the memory location to the stack. |
| 543 | for (int i = 0; i < kNumJSCallerSaved; i++) { |
| 544 | int r = JSCallerSavedCode(i); |
| 545 | if ((regs & (1 << r)) != 0) { |
| 546 | ExternalReference reg_addr = |
| 547 | ExternalReference(Debug_Address::Register(i)); |
| 548 | movq(kScratchRegister, reg_addr); |
| 549 | push(Operand(kScratchRegister, 0)); |
| 550 | } |
| 551 | } |
| 552 | } |
| 553 | |
| 554 | void MacroAssembler::SaveRegistersToMemory(RegList regs) { |
| 555 | ASSERT((regs & ~kJSCallerSaved) == 0); |
| 556 | // Copy the content of registers to memory location. |
| 557 | for (int i = 0; i < kNumJSCallerSaved; i++) { |
| 558 | int r = JSCallerSavedCode(i); |
| 559 | if ((regs & (1 << r)) != 0) { |
| 560 | Register reg = { r }; |
| 561 | ExternalReference reg_addr = |
| 562 | ExternalReference(Debug_Address::Register(i)); |
| 563 | movq(kScratchRegister, reg_addr); |
| 564 | movq(Operand(kScratchRegister, 0), reg); |
| 565 | } |
| 566 | } |
| 567 | } |
| 568 | |
| 569 | |
| 570 | void MacroAssembler::RestoreRegistersFromMemory(RegList regs) { |
| 571 | ASSERT((regs & ~kJSCallerSaved) == 0); |
| 572 | // Copy the content of memory location to registers. |
| 573 | for (int i = kNumJSCallerSaved - 1; i >= 0; i--) { |
| 574 | int r = JSCallerSavedCode(i); |
| 575 | if ((regs & (1 << r)) != 0) { |
| 576 | Register reg = { r }; |
| 577 | ExternalReference reg_addr = |
| 578 | ExternalReference(Debug_Address::Register(i)); |
| 579 | movq(kScratchRegister, reg_addr); |
| 580 | movq(reg, Operand(kScratchRegister, 0)); |
| 581 | } |
| 582 | } |
| 583 | } |
| 584 | |
| 585 | |
| 586 | void MacroAssembler::PopRegistersToMemory(RegList regs) { |
| 587 | ASSERT((regs & ~kJSCallerSaved) == 0); |
| 588 | // Pop the content from the stack to the memory location. |
| 589 | for (int i = kNumJSCallerSaved - 1; i >= 0; i--) { |
| 590 | int r = JSCallerSavedCode(i); |
| 591 | if ((regs & (1 << r)) != 0) { |
| 592 | ExternalReference reg_addr = |
| 593 | ExternalReference(Debug_Address::Register(i)); |
| 594 | movq(kScratchRegister, reg_addr); |
| 595 | pop(Operand(kScratchRegister, 0)); |
| 596 | } |
| 597 | } |
| 598 | } |
| 599 | |
| 600 | |
| 601 | void MacroAssembler::CopyRegistersFromStackToMemory(Register base, |
| 602 | Register scratch, |
| 603 | RegList regs) { |
| 604 | ASSERT(!scratch.is(kScratchRegister)); |
| 605 | ASSERT(!base.is(kScratchRegister)); |
| 606 | ASSERT(!base.is(scratch)); |
| 607 | ASSERT((regs & ~kJSCallerSaved) == 0); |
| 608 | // Copy the content of the stack to the memory location and adjust base. |
| 609 | for (int i = kNumJSCallerSaved - 1; i >= 0; i--) { |
| 610 | int r = JSCallerSavedCode(i); |
| 611 | if ((regs & (1 << r)) != 0) { |
| 612 | movq(scratch, Operand(base, 0)); |
| 613 | ExternalReference reg_addr = |
| 614 | ExternalReference(Debug_Address::Register(i)); |
| 615 | movq(kScratchRegister, reg_addr); |
| 616 | movq(Operand(kScratchRegister, 0), scratch); |
| 617 | lea(base, Operand(base, kPointerSize)); |
| 618 | } |
| 619 | } |
| 620 | } |
| 621 | |
| 622 | #endif // ENABLE_DEBUGGER_SUPPORT |
| 623 | |
| 624 | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 625 | void MacroAssembler::InvokeBuiltin(Builtins::JavaScript id, InvokeFlag flag) { |
| 626 | bool resolved; |
| 627 | Handle<Code> code = ResolveBuiltin(id, &resolved); |
| 628 | |
| 629 | // Calls are not allowed in some stubs. |
| 630 | ASSERT(flag == JUMP_FUNCTION || allow_stub_calls()); |
| 631 | |
| 632 | // Rely on the assertion to check that the number of provided |
| 633 | // arguments match the expected number of arguments. Fake a |
| 634 | // parameter count to avoid emitting code to do the check. |
| 635 | ParameterCount expected(0); |
| 636 | InvokeCode(Handle<Code>(code), expected, expected, |
| 637 | RelocInfo::CODE_TARGET, flag); |
| 638 | |
| 639 | const char* name = Builtins::GetName(id); |
| 640 | int argc = Builtins::GetArgumentsCount(id); |
| 641 | // The target address for the jump is stored as an immediate at offset |
| 642 | // kInvokeCodeAddressOffset. |
| 643 | if (!resolved) { |
| 644 | uint32_t flags = |
| 645 | Bootstrapper::FixupFlagsArgumentsCount::encode(argc) | |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 646 | Bootstrapper::FixupFlagsIsPCRelative::encode(false) | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 647 | Bootstrapper::FixupFlagsUseCodeObject::encode(false); |
| 648 | Unresolved entry = |
| 649 | { pc_offset() - kTargetAddrToReturnAddrDist, flags, name }; |
| 650 | unresolved_.Add(entry); |
| 651 | } |
| 652 | } |
| 653 | |
| 654 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 655 | void MacroAssembler::InvokePrologue(const ParameterCount& expected, |
| 656 | const ParameterCount& actual, |
| 657 | Handle<Code> code_constant, |
| 658 | Register code_register, |
| 659 | Label* done, |
| 660 | InvokeFlag flag) { |
| 661 | bool definitely_matches = false; |
| 662 | Label invoke; |
| 663 | if (expected.is_immediate()) { |
| 664 | ASSERT(actual.is_immediate()); |
| 665 | if (expected.immediate() == actual.immediate()) { |
| 666 | definitely_matches = true; |
| 667 | } else { |
| 668 | movq(rax, Immediate(actual.immediate())); |
| 669 | if (expected.immediate() == |
| 670 | SharedFunctionInfo::kDontAdaptArgumentsSentinel) { |
| 671 | // Don't worry about adapting arguments for built-ins that |
| 672 | // don't want that done. Skip adaption code by making it look |
| 673 | // like we have a match between expected and actual number of |
| 674 | // arguments. |
| 675 | definitely_matches = true; |
| 676 | } else { |
| 677 | movq(rbx, Immediate(expected.immediate())); |
| 678 | } |
| 679 | } |
| 680 | } else { |
| 681 | if (actual.is_immediate()) { |
| 682 | // Expected is in register, actual is immediate. This is the |
| 683 | // case when we invoke function values without going through the |
| 684 | // IC mechanism. |
| 685 | cmpq(expected.reg(), Immediate(actual.immediate())); |
| 686 | j(equal, &invoke); |
| 687 | ASSERT(expected.reg().is(rbx)); |
| 688 | movq(rax, Immediate(actual.immediate())); |
| 689 | } else if (!expected.reg().is(actual.reg())) { |
| 690 | // Both expected and actual are in (different) registers. This |
| 691 | // is the case when we invoke functions using call and apply. |
| 692 | cmpq(expected.reg(), actual.reg()); |
| 693 | j(equal, &invoke); |
| 694 | ASSERT(actual.reg().is(rax)); |
| 695 | ASSERT(expected.reg().is(rbx)); |
| 696 | } |
| 697 | } |
| 698 | |
| 699 | if (!definitely_matches) { |
| 700 | Handle<Code> adaptor = |
| 701 | Handle<Code>(Builtins::builtin(Builtins::ArgumentsAdaptorTrampoline)); |
| 702 | if (!code_constant.is_null()) { |
| 703 | movq(rdx, code_constant, RelocInfo::EMBEDDED_OBJECT); |
| 704 | addq(rdx, Immediate(Code::kHeaderSize - kHeapObjectTag)); |
| 705 | } else if (!code_register.is(rdx)) { |
| 706 | movq(rdx, code_register); |
| 707 | } |
| 708 | |
| 709 | movq(kScratchRegister, adaptor, RelocInfo::CODE_TARGET); |
| 710 | if (flag == CALL_FUNCTION) { |
| 711 | call(kScratchRegister); |
| 712 | jmp(done); |
| 713 | } else { |
| 714 | jmp(kScratchRegister); |
| 715 | } |
| 716 | bind(&invoke); |
| 717 | } |
| 718 | } |
| 719 | |
| 720 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 721 | void MacroAssembler::InvokeCode(Register code, |
| 722 | const ParameterCount& expected, |
| 723 | const ParameterCount& actual, |
| 724 | InvokeFlag flag) { |
| 725 | Label done; |
| 726 | InvokePrologue(expected, actual, Handle<Code>::null(), code, &done, flag); |
| 727 | if (flag == CALL_FUNCTION) { |
| 728 | call(code); |
| 729 | } else { |
| 730 | ASSERT(flag == JUMP_FUNCTION); |
| 731 | jmp(code); |
| 732 | } |
| 733 | bind(&done); |
| 734 | } |
| 735 | |
| 736 | |
| 737 | void MacroAssembler::InvokeCode(Handle<Code> code, |
| 738 | const ParameterCount& expected, |
| 739 | const ParameterCount& actual, |
| 740 | RelocInfo::Mode rmode, |
| 741 | InvokeFlag flag) { |
| 742 | Label done; |
| 743 | Register dummy = rax; |
| 744 | InvokePrologue(expected, actual, code, dummy, &done, flag); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 745 | if (flag == CALL_FUNCTION) { |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 746 | Call(code, rmode); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 747 | } else { |
| 748 | ASSERT(flag == JUMP_FUNCTION); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 749 | Jump(code, rmode); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 750 | } |
| 751 | bind(&done); |
| 752 | } |
| 753 | |
| 754 | |
| 755 | void MacroAssembler::InvokeFunction(Register function, |
| 756 | const ParameterCount& actual, |
| 757 | InvokeFlag flag) { |
| 758 | ASSERT(function.is(rdi)); |
| 759 | movq(rdx, FieldOperand(function, JSFunction::kSharedFunctionInfoOffset)); |
| 760 | movq(rsi, FieldOperand(function, JSFunction::kContextOffset)); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 761 | movsxlq(rbx, |
| 762 | FieldOperand(rdx, SharedFunctionInfo::kFormalParameterCountOffset)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 763 | movq(rdx, FieldOperand(rdx, SharedFunctionInfo::kCodeOffset)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 764 | // Advances rdx to the end of the Code object header, to the start of |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 765 | // the executable code. |
| 766 | lea(rdx, FieldOperand(rdx, Code::kHeaderSize)); |
| 767 | |
| 768 | ParameterCount expected(rbx); |
| 769 | InvokeCode(rdx, expected, actual, flag); |
| 770 | } |
| 771 | |
| 772 | |
| 773 | void MacroAssembler::EnterFrame(StackFrame::Type type) { |
| 774 | push(rbp); |
| 775 | movq(rbp, rsp); |
| 776 | push(rsi); // Context. |
| 777 | push(Immediate(Smi::FromInt(type))); |
| 778 | movq(kScratchRegister, CodeObject(), RelocInfo::EMBEDDED_OBJECT); |
| 779 | push(kScratchRegister); |
| 780 | if (FLAG_debug_code) { |
| 781 | movq(kScratchRegister, |
| 782 | Factory::undefined_value(), |
| 783 | RelocInfo::EMBEDDED_OBJECT); |
| 784 | cmpq(Operand(rsp, 0), kScratchRegister); |
| 785 | Check(not_equal, "code object not properly patched"); |
| 786 | } |
| 787 | } |
| 788 | |
| 789 | |
| 790 | void MacroAssembler::LeaveFrame(StackFrame::Type type) { |
| 791 | if (FLAG_debug_code) { |
| 792 | movq(kScratchRegister, Immediate(Smi::FromInt(type))); |
| 793 | cmpq(Operand(rbp, StandardFrameConstants::kMarkerOffset), kScratchRegister); |
| 794 | Check(equal, "stack frame types must match"); |
| 795 | } |
| 796 | movq(rsp, rbp); |
| 797 | pop(rbp); |
| 798 | } |
| 799 | |
| 800 | |
| 801 | |
| 802 | void MacroAssembler::EnterExitFrame(StackFrame::Type type) { |
| 803 | ASSERT(type == StackFrame::EXIT || type == StackFrame::EXIT_DEBUG); |
| 804 | |
| 805 | // Setup the frame structure on the stack. |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 806 | // All constants are relative to the frame pointer of the exit frame. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 807 | ASSERT(ExitFrameConstants::kCallerSPDisplacement == +2 * kPointerSize); |
| 808 | ASSERT(ExitFrameConstants::kCallerPCOffset == +1 * kPointerSize); |
| 809 | ASSERT(ExitFrameConstants::kCallerFPOffset == 0 * kPointerSize); |
| 810 | push(rbp); |
| 811 | movq(rbp, rsp); |
| 812 | |
| 813 | // Reserve room for entry stack pointer and push the debug marker. |
| 814 | ASSERT(ExitFrameConstants::kSPOffset == -1 * kPointerSize); |
| 815 | push(Immediate(0)); // saved entry sp, patched before call |
| 816 | push(Immediate(type == StackFrame::EXIT_DEBUG ? 1 : 0)); |
| 817 | |
| 818 | // Save the frame pointer and the context in top. |
| 819 | ExternalReference c_entry_fp_address(Top::k_c_entry_fp_address); |
| 820 | ExternalReference context_address(Top::k_context_address); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 821 | movq(r14, rax); // Backup rax before we use it. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 822 | |
| 823 | movq(rax, rbp); |
| 824 | store_rax(c_entry_fp_address); |
| 825 | movq(rax, rsi); |
| 826 | store_rax(context_address); |
| 827 | |
| 828 | // Setup argv in callee-saved register r15. It is reused in LeaveExitFrame, |
| 829 | // so it must be retained across the C-call. |
| 830 | int offset = StandardFrameConstants::kCallerSPOffset - kPointerSize; |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 831 | lea(r15, Operand(rbp, r14, times_pointer_size, offset)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 832 | |
| 833 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 834 | // Save the state of all registers to the stack from the memory |
| 835 | // location. This is needed to allow nested break points. |
| 836 | if (type == StackFrame::EXIT_DEBUG) { |
| 837 | // TODO(1243899): This should be symmetric to |
| 838 | // CopyRegistersFromStackToMemory() but it isn't! esp is assumed |
| 839 | // correct here, but computed for the other call. Very error |
| 840 | // prone! FIX THIS. Actually there are deeper problems with |
| 841 | // register saving than this asymmetry (see the bug report |
| 842 | // associated with this issue). |
| 843 | PushRegistersFromMemory(kJSCallerSaved); |
| 844 | } |
| 845 | #endif |
| 846 | |
| 847 | // Reserve space for two arguments: argc and argv |
| 848 | subq(rsp, Immediate(2 * kPointerSize)); |
| 849 | |
| 850 | // Get the required frame alignment for the OS. |
| 851 | static const int kFrameAlignment = OS::ActivationFrameAlignment(); |
| 852 | if (kFrameAlignment > 0) { |
| 853 | ASSERT(IsPowerOf2(kFrameAlignment)); |
| 854 | movq(kScratchRegister, Immediate(-kFrameAlignment)); |
| 855 | and_(rsp, kScratchRegister); |
| 856 | } |
| 857 | |
| 858 | // Patch the saved entry sp. |
| 859 | movq(Operand(rbp, ExitFrameConstants::kSPOffset), rsp); |
| 860 | } |
| 861 | |
| 862 | |
| 863 | void MacroAssembler::LeaveExitFrame(StackFrame::Type type) { |
| 864 | // Registers: |
| 865 | // r15 : argv |
| 866 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 867 | // Restore the memory copy of the registers by digging them out from |
| 868 | // the stack. This is needed to allow nested break points. |
| 869 | if (type == StackFrame::EXIT_DEBUG) { |
| 870 | // It's okay to clobber register ebx below because we don't need |
| 871 | // the function pointer after this. |
| 872 | const int kCallerSavedSize = kNumJSCallerSaved * kPointerSize; |
| 873 | int kOffset = ExitFrameConstants::kDebugMarkOffset - kCallerSavedSize; |
| 874 | lea(rbx, Operand(rbp, kOffset)); |
| 875 | CopyRegistersFromStackToMemory(rbx, rcx, kJSCallerSaved); |
| 876 | } |
| 877 | #endif |
| 878 | |
| 879 | // Get the return address from the stack and restore the frame pointer. |
| 880 | movq(rcx, Operand(rbp, 1 * kPointerSize)); |
| 881 | movq(rbp, Operand(rbp, 0 * kPointerSize)); |
| 882 | |
| 883 | // Pop the arguments and the receiver from the caller stack. |
| 884 | lea(rsp, Operand(r15, 1 * kPointerSize)); |
| 885 | |
| 886 | // Restore current context from top and clear it in debug mode. |
| 887 | ExternalReference context_address(Top::k_context_address); |
| 888 | movq(kScratchRegister, context_address); |
| 889 | movq(rsi, Operand(kScratchRegister, 0)); |
| 890 | #ifdef DEBUG |
| 891 | movq(Operand(kScratchRegister, 0), Immediate(0)); |
| 892 | #endif |
| 893 | |
| 894 | // Push the return address to get ready to return. |
| 895 | push(rcx); |
| 896 | |
| 897 | // Clear the top frame. |
| 898 | ExternalReference c_entry_fp_address(Top::k_c_entry_fp_address); |
| 899 | movq(kScratchRegister, c_entry_fp_address); |
| 900 | movq(Operand(kScratchRegister, 0), Immediate(0)); |
| 901 | } |
| 902 | |
| 903 | |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 904 | Register MacroAssembler::CheckMaps(JSObject* object, Register object_reg, |
| 905 | JSObject* holder, Register holder_reg, |
| 906 | Register scratch, |
| 907 | Label* miss) { |
| 908 | // Make sure there's no overlap between scratch and the other |
| 909 | // registers. |
| 910 | ASSERT(!scratch.is(object_reg) && !scratch.is(holder_reg)); |
| 911 | |
| 912 | // Keep track of the current object in register reg. On the first |
| 913 | // iteration, reg is an alias for object_reg, on later iterations, |
| 914 | // it is an alias for holder_reg. |
| 915 | Register reg = object_reg; |
| 916 | int depth = 1; |
| 917 | |
| 918 | // Check the maps in the prototype chain. |
| 919 | // Traverse the prototype chain from the object and do map checks. |
| 920 | while (object != holder) { |
| 921 | depth++; |
| 922 | |
| 923 | // Only global objects and objects that do not require access |
| 924 | // checks are allowed in stubs. |
| 925 | ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded()); |
| 926 | |
| 927 | JSObject* prototype = JSObject::cast(object->GetPrototype()); |
| 928 | if (Heap::InNewSpace(prototype)) { |
| 929 | // Get the map of the current object. |
| 930 | movq(scratch, FieldOperand(reg, HeapObject::kMapOffset)); |
| 931 | Cmp(scratch, Handle<Map>(object->map())); |
| 932 | // Branch on the result of the map check. |
| 933 | j(not_equal, miss); |
| 934 | // Check access rights to the global object. This has to happen |
| 935 | // after the map check so that we know that the object is |
| 936 | // actually a global object. |
| 937 | if (object->IsJSGlobalProxy()) { |
| 938 | CheckAccessGlobalProxy(reg, scratch, miss); |
| 939 | |
| 940 | // Restore scratch register to be the map of the object. |
| 941 | // We load the prototype from the map in the scratch register. |
| 942 | movq(scratch, FieldOperand(reg, HeapObject::kMapOffset)); |
| 943 | } |
| 944 | // The prototype is in new space; we cannot store a reference |
| 945 | // to it in the code. Load it from the map. |
| 946 | reg = holder_reg; // from now the object is in holder_reg |
| 947 | movq(reg, FieldOperand(scratch, Map::kPrototypeOffset)); |
| 948 | |
| 949 | } else { |
| 950 | // Check the map of the current object. |
| 951 | Cmp(FieldOperand(reg, HeapObject::kMapOffset), |
| 952 | Handle<Map>(object->map())); |
| 953 | // Branch on the result of the map check. |
| 954 | j(not_equal, miss); |
| 955 | // Check access rights to the global object. This has to happen |
| 956 | // after the map check so that we know that the object is |
| 957 | // actually a global object. |
| 958 | if (object->IsJSGlobalProxy()) { |
| 959 | CheckAccessGlobalProxy(reg, scratch, miss); |
| 960 | } |
| 961 | // The prototype is in old space; load it directly. |
| 962 | reg = holder_reg; // from now the object is in holder_reg |
| 963 | Move(reg, Handle<JSObject>(prototype)); |
| 964 | } |
| 965 | |
| 966 | // Go to the next object in the prototype chain. |
| 967 | object = prototype; |
| 968 | } |
| 969 | |
| 970 | // Check the holder map. |
| 971 | Cmp(FieldOperand(reg, HeapObject::kMapOffset), |
| 972 | Handle<Map>(holder->map())); |
| 973 | j(not_equal, miss); |
| 974 | |
| 975 | // Log the check depth. |
| 976 | LOG(IntEvent("check-maps-depth", depth)); |
| 977 | |
| 978 | // Perform security check for access to the global object and return |
| 979 | // the holder register. |
| 980 | ASSERT(object == holder); |
| 981 | ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded()); |
| 982 | if (object->IsJSGlobalProxy()) { |
| 983 | CheckAccessGlobalProxy(reg, scratch, miss); |
| 984 | } |
| 985 | return reg; |
| 986 | } |
| 987 | |
| 988 | |
| 989 | |
| 990 | |
| 991 | void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg, |
| 992 | Register scratch, |
| 993 | Label* miss) { |
| 994 | Label same_contexts; |
| 995 | |
| 996 | ASSERT(!holder_reg.is(scratch)); |
| 997 | ASSERT(!scratch.is(kScratchRegister)); |
| 998 | // Load current lexical context from the stack frame. |
| 999 | movq(scratch, Operand(rbp, StandardFrameConstants::kContextOffset)); |
| 1000 | |
| 1001 | // When generating debug code, make sure the lexical context is set. |
| 1002 | if (FLAG_debug_code) { |
| 1003 | cmpq(scratch, Immediate(0)); |
| 1004 | Check(not_equal, "we should not have an empty lexical context"); |
| 1005 | } |
| 1006 | // Load the global context of the current context. |
| 1007 | int offset = Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; |
| 1008 | movq(scratch, FieldOperand(scratch, offset)); |
| 1009 | movq(scratch, FieldOperand(scratch, GlobalObject::kGlobalContextOffset)); |
| 1010 | |
| 1011 | // Check the context is a global context. |
| 1012 | if (FLAG_debug_code) { |
| 1013 | Cmp(FieldOperand(scratch, HeapObject::kMapOffset), |
| 1014 | Factory::global_context_map()); |
| 1015 | Check(equal, "JSGlobalObject::global_context should be a global context."); |
| 1016 | } |
| 1017 | |
| 1018 | // Check if both contexts are the same. |
| 1019 | cmpq(scratch, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
| 1020 | j(equal, &same_contexts); |
| 1021 | |
| 1022 | // Compare security tokens. |
| 1023 | // Check that the security token in the calling global object is |
| 1024 | // compatible with the security token in the receiving global |
| 1025 | // object. |
| 1026 | |
| 1027 | // Check the context is a global context. |
| 1028 | if (FLAG_debug_code) { |
| 1029 | // Preserve original value of holder_reg. |
| 1030 | push(holder_reg); |
| 1031 | movq(holder_reg, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
| 1032 | Cmp(holder_reg, Factory::null_value()); |
| 1033 | Check(not_equal, "JSGlobalProxy::context() should not be null."); |
| 1034 | |
| 1035 | // Read the first word and compare to global_context_map(), |
| 1036 | movq(holder_reg, FieldOperand(holder_reg, HeapObject::kMapOffset)); |
| 1037 | Cmp(holder_reg, Factory::global_context_map()); |
| 1038 | Check(equal, "JSGlobalObject::global_context should be a global context."); |
| 1039 | pop(holder_reg); |
| 1040 | } |
| 1041 | |
| 1042 | movq(kScratchRegister, |
| 1043 | FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
| 1044 | int token_offset = Context::kHeaderSize + |
| 1045 | Context::SECURITY_TOKEN_INDEX * kPointerSize; |
| 1046 | movq(scratch, FieldOperand(scratch, token_offset)); |
| 1047 | cmpq(scratch, FieldOperand(kScratchRegister, token_offset)); |
| 1048 | j(not_equal, miss); |
| 1049 | |
| 1050 | bind(&same_contexts); |
| 1051 | } |
| 1052 | |
| 1053 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 1054 | } } // namespace v8::internal |