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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 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 #if V8_TARGET_ARCH_IA32 | 5 #if V8_TARGET_ARCH_IA32 |
6 | 6 |
7 #include "src/base/bits.h" | 7 #include "src/base/bits.h" |
8 #include "src/bootstrapper.h" | 8 #include "src/bootstrapper.h" |
9 #include "src/code-stubs.h" | 9 #include "src/code-stubs.h" |
10 #include "src/codegen.h" | 10 #include "src/codegen.h" |
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2418 } | 2418 } |
2419 | 2419 |
2420 | 2420 |
2421 void CEntryStub::Generate(MacroAssembler* masm) { | 2421 void CEntryStub::Generate(MacroAssembler* masm) { |
2422 // eax: number of arguments including receiver | 2422 // eax: number of arguments including receiver |
2423 // ebx: pointer to C function (C callee-saved) | 2423 // ebx: pointer to C function (C callee-saved) |
2424 // ebp: frame pointer (restored after C call) | 2424 // ebp: frame pointer (restored after C call) |
2425 // esp: stack pointer (restored after C call) | 2425 // esp: stack pointer (restored after C call) |
2426 // esi: current context (C callee-saved) | 2426 // esi: current context (C callee-saved) |
2427 // edi: JS function of the caller (C callee-saved) | 2427 // edi: JS function of the caller (C callee-saved) |
| 2428 // |
| 2429 // If argv_in_register(): |
| 2430 // ecx: pointer to the first argument |
2428 | 2431 |
2429 ProfileEntryHookStub::MaybeCallEntryHook(masm); | 2432 ProfileEntryHookStub::MaybeCallEntryHook(masm); |
2430 | 2433 |
2431 // Enter the exit frame that transitions from JavaScript to C++. | 2434 // Enter the exit frame that transitions from JavaScript to C++. |
2432 __ EnterExitFrame(save_doubles()); | 2435 if (argv_in_register()) { |
| 2436 DCHECK(!save_doubles()); |
| 2437 __ EnterApiExitFrame(3); |
| 2438 |
| 2439 // Move argc and argv into the correct registers. |
| 2440 __ mov(esi, ecx); |
| 2441 __ mov(edi, eax); |
| 2442 } else { |
| 2443 __ EnterExitFrame(save_doubles()); |
| 2444 } |
2433 | 2445 |
2434 // ebx: pointer to C function (C callee-saved) | 2446 // ebx: pointer to C function (C callee-saved) |
2435 // ebp: frame pointer (restored after C call) | 2447 // ebp: frame pointer (restored after C call) |
2436 // esp: stack pointer (restored after C call) | 2448 // esp: stack pointer (restored after C call) |
2437 // edi: number of arguments including receiver (C callee-saved) | 2449 // edi: number of arguments including receiver (C callee-saved) |
2438 // esi: pointer to the first argument (C callee-saved) | 2450 // esi: pointer to the first argument (C callee-saved) |
2439 | 2451 |
2440 // Result returned in eax, or eax+edx if result size is 2. | 2452 // Result returned in eax, or eax+edx if result size is 2. |
2441 | 2453 |
2442 // Check stack alignment. | 2454 // Check stack alignment. |
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2467 Isolate::kPendingExceptionAddress, isolate()); | 2479 Isolate::kPendingExceptionAddress, isolate()); |
2468 __ cmp(edx, Operand::StaticVariable(pending_exception_address)); | 2480 __ cmp(edx, Operand::StaticVariable(pending_exception_address)); |
2469 // Cannot use check here as it attempts to generate call into runtime. | 2481 // Cannot use check here as it attempts to generate call into runtime. |
2470 __ j(equal, &okay, Label::kNear); | 2482 __ j(equal, &okay, Label::kNear); |
2471 __ int3(); | 2483 __ int3(); |
2472 __ bind(&okay); | 2484 __ bind(&okay); |
2473 __ pop(edx); | 2485 __ pop(edx); |
2474 } | 2486 } |
2475 | 2487 |
2476 // Exit the JavaScript to C++ exit frame. | 2488 // Exit the JavaScript to C++ exit frame. |
2477 __ LeaveExitFrame(save_doubles()); | 2489 __ LeaveExitFrame(save_doubles(), !argv_in_register()); |
2478 __ ret(0); | 2490 __ ret(0); |
2479 | 2491 |
2480 // Handling of exception. | 2492 // Handling of exception. |
2481 __ bind(&exception_returned); | 2493 __ bind(&exception_returned); |
2482 | 2494 |
2483 ExternalReference pending_handler_context_address( | 2495 ExternalReference pending_handler_context_address( |
2484 Isolate::kPendingHandlerContextAddress, isolate()); | 2496 Isolate::kPendingHandlerContextAddress, isolate()); |
2485 ExternalReference pending_handler_code_address( | 2497 ExternalReference pending_handler_code_address( |
2486 Isolate::kPendingHandlerCodeAddress, isolate()); | 2498 Isolate::kPendingHandlerCodeAddress, isolate()); |
2487 ExternalReference pending_handler_offset_address( | 2499 ExternalReference pending_handler_offset_address( |
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5815 Operand(ebp, 7 * kPointerSize), NULL); | 5827 Operand(ebp, 7 * kPointerSize), NULL); |
5816 } | 5828 } |
5817 | 5829 |
5818 | 5830 |
5819 #undef __ | 5831 #undef __ |
5820 | 5832 |
5821 } // namespace internal | 5833 } // namespace internal |
5822 } // namespace v8 | 5834 } // namespace v8 |
5823 | 5835 |
5824 #endif // V8_TARGET_ARCH_IA32 | 5836 #endif // V8_TARGET_ARCH_IA32 |
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