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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/v8.h" | 5 #include "src/v8.h" |
6 | 6 |
7 #if V8_TARGET_ARCH_X64 | 7 #if V8_TARGET_ARCH_X64 |
8 | 8 |
9 #include "src/bootstrapper.h" | 9 #include "src/bootstrapper.h" |
10 #include "src/code-stubs.h" | 10 #include "src/code-stubs.h" |
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1037 // Return and remove the on-stack parameters. | 1037 // Return and remove the on-stack parameters. |
1038 __ bind(&done); | 1038 __ bind(&done); |
1039 __ ret(3 * kPointerSize); | 1039 __ ret(3 * kPointerSize); |
1040 | 1040 |
1041 // Do the runtime call to allocate the arguments object. | 1041 // Do the runtime call to allocate the arguments object. |
1042 __ bind(&runtime); | 1042 __ bind(&runtime); |
1043 __ TailCallRuntime(Runtime::kNewStrictArguments, 3, 1); | 1043 __ TailCallRuntime(Runtime::kNewStrictArguments, 3, 1); |
1044 } | 1044 } |
1045 | 1045 |
1046 | 1046 |
1047 static void ThrowPendingException(MacroAssembler* masm) { | |
1048 Isolate* isolate = masm->isolate(); | |
1049 | |
1050 ExternalReference pending_handler_context_address( | |
1051 Isolate::kPendingHandlerContextAddress, isolate); | |
1052 ExternalReference pending_handler_code_address( | |
1053 Isolate::kPendingHandlerCodeAddress, isolate); | |
1054 ExternalReference pending_handler_offset_address( | |
1055 Isolate::kPendingHandlerOffsetAddress, isolate); | |
1056 ExternalReference pending_handler_fp_address( | |
1057 Isolate::kPendingHandlerFPAddress, isolate); | |
1058 ExternalReference pending_handler_sp_address( | |
1059 Isolate::kPendingHandlerSPAddress, isolate); | |
1060 | |
1061 // Ask the runtime for help to determine the handler. This will set rax to | |
1062 // contain the current pending exception, don't clobber it. | |
1063 ExternalReference find_handler(Runtime::kFindExceptionHandler, isolate); | |
1064 { | |
1065 FrameScope scope(masm, StackFrame::MANUAL); | |
1066 __ movp(arg_reg_1, Immediate(0)); // argc. | |
1067 __ movp(arg_reg_2, Immediate(0)); // argv. | |
1068 __ Move(arg_reg_3, ExternalReference::isolate_address(isolate)); | |
1069 __ PrepareCallCFunction(3); | |
1070 __ CallCFunction(find_handler, 3); | |
1071 } | |
1072 | |
1073 // Retrieve the handler context, SP and FP. | |
1074 __ movp(rsi, masm->ExternalOperand(pending_handler_context_address)); | |
1075 __ movp(rsp, masm->ExternalOperand(pending_handler_sp_address)); | |
1076 __ movp(rbp, masm->ExternalOperand(pending_handler_fp_address)); | |
1077 | |
1078 // If the handler is a JS frame, restore the context to the frame. | |
1079 // (kind == ENTRY) == (rbp == 0) == (rsi == 0), so we could test either | |
1080 // rbp or rsi. | |
1081 Label skip; | |
1082 __ testp(rsi, rsi); | |
1083 __ j(zero, &skip, Label::kNear); | |
1084 __ movp(Operand(rbp, StandardFrameConstants::kContextOffset), rsi); | |
1085 __ bind(&skip); | |
1086 | |
1087 // Compute the handler entry address and jump to it. | |
1088 __ movp(rdi, masm->ExternalOperand(pending_handler_code_address)); | |
1089 __ movp(rdx, masm->ExternalOperand(pending_handler_offset_address)); | |
1090 __ leap(rdi, FieldOperand(rdi, rdx, times_1, Code::kHeaderSize)); | |
1091 __ jmp(rdi); | |
1092 } | |
1093 | |
1094 | |
1095 void RegExpExecStub::Generate(MacroAssembler* masm) { | 1047 void RegExpExecStub::Generate(MacroAssembler* masm) { |
1096 // Just jump directly to runtime if native RegExp is not selected at compile | 1048 // Just jump directly to runtime if native RegExp is not selected at compile |
1097 // time or if regexp entry in generated code is turned off runtime switch or | 1049 // time or if regexp entry in generated code is turned off runtime switch or |
1098 // at compilation. | 1050 // at compilation. |
1099 #ifdef V8_INTERPRETED_REGEXP | 1051 #ifdef V8_INTERPRETED_REGEXP |
1100 __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); | 1052 __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
1101 #else // V8_INTERPRETED_REGEXP | 1053 #else // V8_INTERPRETED_REGEXP |
1102 | 1054 |
1103 // Stack frame on entry. | 1055 // Stack frame on entry. |
1104 // rsp[0] : return address | 1056 // rsp[0] : return address |
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1473 ExternalReference pending_exception_address( | 1425 ExternalReference pending_exception_address( |
1474 Isolate::kPendingExceptionAddress, isolate()); | 1426 Isolate::kPendingExceptionAddress, isolate()); |
1475 Operand pending_exception_operand = | 1427 Operand pending_exception_operand = |
1476 masm->ExternalOperand(pending_exception_address, rbx); | 1428 masm->ExternalOperand(pending_exception_address, rbx); |
1477 __ movp(rax, pending_exception_operand); | 1429 __ movp(rax, pending_exception_operand); |
1478 __ LoadRoot(rdx, Heap::kTheHoleValueRootIndex); | 1430 __ LoadRoot(rdx, Heap::kTheHoleValueRootIndex); |
1479 __ cmpp(rax, rdx); | 1431 __ cmpp(rax, rdx); |
1480 __ j(equal, &runtime); | 1432 __ j(equal, &runtime); |
1481 | 1433 |
1482 // For exception, throw the exception again. | 1434 // For exception, throw the exception again. |
1483 __ EnterExitFrame(false); | 1435 __ TailCallRuntime(Runtime::kRegExpExecReThrow, 4, 1); |
1484 ThrowPendingException(masm); | |
1485 | 1436 |
1486 // Do the runtime call to execute the regexp. | 1437 // Do the runtime call to execute the regexp. |
1487 __ bind(&runtime); | 1438 __ bind(&runtime); |
1488 __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); | 1439 __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
1489 | 1440 |
1490 // Deferred code for string handling. | 1441 // Deferred code for string handling. |
1491 // (7) Not a long external string? If yes, go to (10). | 1442 // (7) Not a long external string? If yes, go to (10). |
1492 __ bind(¬_seq_nor_cons); | 1443 __ bind(¬_seq_nor_cons); |
1493 // Compare flags are still set from (3). | 1444 // Compare flags are still set from (3). |
1494 __ j(greater, ¬_long_external, Label::kNear); // Go to (10). | 1445 __ j(greater, ¬_long_external, Label::kNear); // Go to (10). |
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2485 __ int3(); | 2436 __ int3(); |
2486 __ bind(&okay); | 2437 __ bind(&okay); |
2487 } | 2438 } |
2488 | 2439 |
2489 // Exit the JavaScript to C++ exit frame. | 2440 // Exit the JavaScript to C++ exit frame. |
2490 __ LeaveExitFrame(save_doubles()); | 2441 __ LeaveExitFrame(save_doubles()); |
2491 __ ret(0); | 2442 __ ret(0); |
2492 | 2443 |
2493 // Handling of exception. | 2444 // Handling of exception. |
2494 __ bind(&exception_returned); | 2445 __ bind(&exception_returned); |
2495 ThrowPendingException(masm); | 2446 |
| 2447 ExternalReference pending_handler_context_address( |
| 2448 Isolate::kPendingHandlerContextAddress, isolate()); |
| 2449 ExternalReference pending_handler_code_address( |
| 2450 Isolate::kPendingHandlerCodeAddress, isolate()); |
| 2451 ExternalReference pending_handler_offset_address( |
| 2452 Isolate::kPendingHandlerOffsetAddress, isolate()); |
| 2453 ExternalReference pending_handler_fp_address( |
| 2454 Isolate::kPendingHandlerFPAddress, isolate()); |
| 2455 ExternalReference pending_handler_sp_address( |
| 2456 Isolate::kPendingHandlerSPAddress, isolate()); |
| 2457 |
| 2458 // Ask the runtime for help to determine the handler. This will set rax to |
| 2459 // contain the current pending exception, don't clobber it. |
| 2460 ExternalReference find_handler(Runtime::kFindExceptionHandler, isolate()); |
| 2461 { |
| 2462 FrameScope scope(masm, StackFrame::MANUAL); |
| 2463 __ movp(arg_reg_1, Immediate(0)); // argc. |
| 2464 __ movp(arg_reg_2, Immediate(0)); // argv. |
| 2465 __ Move(arg_reg_3, ExternalReference::isolate_address(isolate())); |
| 2466 __ PrepareCallCFunction(3); |
| 2467 __ CallCFunction(find_handler, 3); |
| 2468 } |
| 2469 |
| 2470 // Retrieve the handler context, SP and FP. |
| 2471 __ movp(rsi, masm->ExternalOperand(pending_handler_context_address)); |
| 2472 __ movp(rsp, masm->ExternalOperand(pending_handler_sp_address)); |
| 2473 __ movp(rbp, masm->ExternalOperand(pending_handler_fp_address)); |
| 2474 |
| 2475 // If the handler is a JS frame, restore the context to the frame. |
| 2476 // (kind == ENTRY) == (rbp == 0) == (rsi == 0), so we could test either |
| 2477 // rbp or rsi. |
| 2478 Label skip; |
| 2479 __ testp(rsi, rsi); |
| 2480 __ j(zero, &skip, Label::kNear); |
| 2481 __ movp(Operand(rbp, StandardFrameConstants::kContextOffset), rsi); |
| 2482 __ bind(&skip); |
| 2483 |
| 2484 // Compute the handler entry address and jump to it. |
| 2485 __ movp(rdi, masm->ExternalOperand(pending_handler_code_address)); |
| 2486 __ movp(rdx, masm->ExternalOperand(pending_handler_offset_address)); |
| 2487 __ leap(rdi, FieldOperand(rdi, rdx, times_1, Code::kHeaderSize)); |
| 2488 __ jmp(rdi); |
2496 } | 2489 } |
2497 | 2490 |
2498 | 2491 |
2499 void JSEntryStub::Generate(MacroAssembler* masm) { | 2492 void JSEntryStub::Generate(MacroAssembler* masm) { |
2500 Label invoke, handler_entry, exit; | 2493 Label invoke, handler_entry, exit; |
2501 Label not_outermost_js, not_outermost_js_2; | 2494 Label not_outermost_js, not_outermost_js_2; |
2502 | 2495 |
2503 ProfileEntryHookStub::MaybeCallEntryHook(masm); | 2496 ProfileEntryHookStub::MaybeCallEntryHook(masm); |
2504 | 2497 |
2505 { // NOLINT. Scope block confuses linter. | 2498 { // NOLINT. Scope block confuses linter. |
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5361 CallApiFunctionAndReturn(masm, api_function_address, thunk_ref, getter_arg, | 5354 CallApiFunctionAndReturn(masm, api_function_address, thunk_ref, getter_arg, |
5362 kStackSpace, nullptr, return_value_operand, NULL); | 5355 kStackSpace, nullptr, return_value_operand, NULL); |
5363 } | 5356 } |
5364 | 5357 |
5365 | 5358 |
5366 #undef __ | 5359 #undef __ |
5367 | 5360 |
5368 } } // namespace v8::internal | 5361 } } // namespace v8::internal |
5369 | 5362 |
5370 #endif // V8_TARGET_ARCH_X64 | 5363 #endif // V8_TARGET_ARCH_X64 |
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