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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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3544 Label failure; | 3544 Label failure; |
3545 __ cmp(eax, NativeRegExpMacroAssembler::FAILURE); | 3545 __ cmp(eax, NativeRegExpMacroAssembler::FAILURE); |
3546 __ j(equal, &failure); | 3546 __ j(equal, &failure); |
3547 __ cmp(eax, NativeRegExpMacroAssembler::EXCEPTION); | 3547 __ cmp(eax, NativeRegExpMacroAssembler::EXCEPTION); |
3548 // If not exception it can only be retry. Handle that in the runtime system. | 3548 // If not exception it can only be retry. Handle that in the runtime system. |
3549 __ j(not_equal, &runtime); | 3549 __ j(not_equal, &runtime); |
3550 // Result must now be exception. If there is no pending exception already a | 3550 // Result must now be exception. If there is no pending exception already a |
3551 // stack overflow (on the backtrack stack) was detected in RegExp code but | 3551 // stack overflow (on the backtrack stack) was detected in RegExp code but |
3552 // haven't created the exception yet. Handle that in the runtime system. | 3552 // haven't created the exception yet. Handle that in the runtime system. |
3553 // TODO(592): Rerunning the RegExp to get the stack overflow exception. | 3553 // TODO(592): Rerunning the RegExp to get the stack overflow exception. |
3554 ExternalReference pending_exception(Isolate::k_pending_exception_address, | 3554 ExternalReference pending_exception(Isolate::kPendingExceptionAddress, |
3555 masm->isolate()); | 3555 masm->isolate()); |
3556 __ mov(edx, | 3556 __ mov(edx, |
3557 Operand::StaticVariable(ExternalReference::the_hole_value_location( | 3557 Operand::StaticVariable(ExternalReference::the_hole_value_location( |
3558 masm->isolate()))); | 3558 masm->isolate()))); |
3559 __ mov(eax, Operand::StaticVariable(pending_exception)); | 3559 __ mov(eax, Operand::StaticVariable(pending_exception)); |
3560 __ cmp(edx, Operand(eax)); | 3560 __ cmp(edx, Operand(eax)); |
3561 __ j(equal, &runtime); | 3561 __ j(equal, &runtime); |
3562 // For exception, throw the exception again. | 3562 // For exception, throw the exception again. |
3563 | 3563 |
3564 // Clear the pending exception variable. | 3564 // Clear the pending exception variable. |
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4334 | 4334 |
4335 // Check for failure result. | 4335 // Check for failure result. |
4336 Label failure_returned; | 4336 Label failure_returned; |
4337 STATIC_ASSERT(((kFailureTag + 1) & kFailureTagMask) == 0); | 4337 STATIC_ASSERT(((kFailureTag + 1) & kFailureTagMask) == 0); |
4338 __ lea(ecx, Operand(eax, 1)); | 4338 __ lea(ecx, Operand(eax, 1)); |
4339 // Lower 2 bits of ecx are 0 iff eax has failure tag. | 4339 // Lower 2 bits of ecx are 0 iff eax has failure tag. |
4340 __ test(ecx, Immediate(kFailureTagMask)); | 4340 __ test(ecx, Immediate(kFailureTagMask)); |
4341 __ j(zero, &failure_returned); | 4341 __ j(zero, &failure_returned); |
4342 | 4342 |
4343 ExternalReference pending_exception_address( | 4343 ExternalReference pending_exception_address( |
4344 Isolate::k_pending_exception_address, masm->isolate()); | 4344 Isolate::kPendingExceptionAddress, masm->isolate()); |
4345 | 4345 |
4346 // Check that there is no pending exception, otherwise we | 4346 // Check that there is no pending exception, otherwise we |
4347 // should have returned some failure value. | 4347 // should have returned some failure value. |
4348 if (FLAG_debug_code) { | 4348 if (FLAG_debug_code) { |
4349 __ push(edx); | 4349 __ push(edx); |
4350 __ mov(edx, Operand::StaticVariable( | 4350 __ mov(edx, Operand::StaticVariable( |
4351 ExternalReference::the_hole_value_location(masm->isolate()))); | 4351 ExternalReference::the_hole_value_location(masm->isolate()))); |
4352 Label okay; | 4352 Label okay; |
4353 __ cmp(edx, Operand::StaticVariable(pending_exception_address)); | 4353 __ cmp(edx, Operand::StaticVariable(pending_exception_address)); |
4354 // Cannot use check here as it attempts to generate call into runtime. | 4354 // Cannot use check here as it attempts to generate call into runtime. |
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4475 // Push marker in two places. | 4475 // Push marker in two places. |
4476 int marker = is_construct ? StackFrame::ENTRY_CONSTRUCT : StackFrame::ENTRY; | 4476 int marker = is_construct ? StackFrame::ENTRY_CONSTRUCT : StackFrame::ENTRY; |
4477 __ push(Immediate(Smi::FromInt(marker))); // context slot | 4477 __ push(Immediate(Smi::FromInt(marker))); // context slot |
4478 __ push(Immediate(Smi::FromInt(marker))); // function slot | 4478 __ push(Immediate(Smi::FromInt(marker))); // function slot |
4479 // Save callee-saved registers (C calling conventions). | 4479 // Save callee-saved registers (C calling conventions). |
4480 __ push(edi); | 4480 __ push(edi); |
4481 __ push(esi); | 4481 __ push(esi); |
4482 __ push(ebx); | 4482 __ push(ebx); |
4483 | 4483 |
4484 // Save copies of the top frame descriptor on the stack. | 4484 // Save copies of the top frame descriptor on the stack. |
4485 ExternalReference c_entry_fp(Isolate::k_c_entry_fp_address, masm->isolate()); | 4485 ExternalReference c_entry_fp(Isolate::kCEntryFPAddress, masm->isolate()); |
4486 __ push(Operand::StaticVariable(c_entry_fp)); | 4486 __ push(Operand::StaticVariable(c_entry_fp)); |
4487 | 4487 |
4488 // If this is the outermost JS call, set js_entry_sp value. | 4488 // If this is the outermost JS call, set js_entry_sp value. |
4489 ExternalReference js_entry_sp(Isolate::k_js_entry_sp_address, | 4489 ExternalReference js_entry_sp(Isolate::kJSEntrySPAddress, |
4490 masm->isolate()); | 4490 masm->isolate()); |
4491 __ cmp(Operand::StaticVariable(js_entry_sp), Immediate(0)); | 4491 __ cmp(Operand::StaticVariable(js_entry_sp), Immediate(0)); |
4492 __ j(not_equal, ¬_outermost_js, Label::kNear); | 4492 __ j(not_equal, ¬_outermost_js, Label::kNear); |
4493 __ mov(Operand::StaticVariable(js_entry_sp), ebp); | 4493 __ mov(Operand::StaticVariable(js_entry_sp), ebp); |
4494 __ push(Immediate(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME))); | 4494 __ push(Immediate(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME))); |
4495 Label cont; | 4495 Label cont; |
4496 __ jmp(&cont, Label::kNear); | 4496 __ jmp(&cont, Label::kNear); |
4497 __ bind(¬_outermost_js); | 4497 __ bind(¬_outermost_js); |
4498 __ push(Immediate(Smi::FromInt(StackFrame::INNER_JSENTRY_FRAME))); | 4498 __ push(Immediate(Smi::FromInt(StackFrame::INNER_JSENTRY_FRAME))); |
4499 __ bind(&cont); | 4499 __ bind(&cont); |
4500 | 4500 |
4501 // Call a faked try-block that does the invoke. | 4501 // Call a faked try-block that does the invoke. |
4502 __ call(&invoke); | 4502 __ call(&invoke); |
4503 | 4503 |
4504 // Caught exception: Store result (exception) in the pending | 4504 // Caught exception: Store result (exception) in the pending |
4505 // exception field in the JSEnv and return a failure sentinel. | 4505 // exception field in the JSEnv and return a failure sentinel. |
4506 ExternalReference pending_exception(Isolate::k_pending_exception_address, | 4506 ExternalReference pending_exception(Isolate::kPendingExceptionAddress, |
4507 masm->isolate()); | 4507 masm->isolate()); |
4508 __ mov(Operand::StaticVariable(pending_exception), eax); | 4508 __ mov(Operand::StaticVariable(pending_exception), eax); |
4509 __ mov(eax, reinterpret_cast<int32_t>(Failure::Exception())); | 4509 __ mov(eax, reinterpret_cast<int32_t>(Failure::Exception())); |
4510 __ jmp(&exit); | 4510 __ jmp(&exit); |
4511 | 4511 |
4512 // Invoke: Link this frame into the handler chain. | 4512 // Invoke: Link this frame into the handler chain. |
4513 __ bind(&invoke); | 4513 __ bind(&invoke); |
4514 __ PushTryHandler(IN_JS_ENTRY, JS_ENTRY_HANDLER); | 4514 __ PushTryHandler(IN_JS_ENTRY, JS_ENTRY_HANDLER); |
4515 | 4515 |
4516 // Clear any pending exceptions. | 4516 // Clear any pending exceptions. |
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4547 // Check if the current stack frame is marked as the outermost JS frame. | 4547 // Check if the current stack frame is marked as the outermost JS frame. |
4548 __ pop(ebx); | 4548 __ pop(ebx); |
4549 __ cmp(Operand(ebx), | 4549 __ cmp(Operand(ebx), |
4550 Immediate(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME))); | 4550 Immediate(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME))); |
4551 __ j(not_equal, ¬_outermost_js_2); | 4551 __ j(not_equal, ¬_outermost_js_2); |
4552 __ mov(Operand::StaticVariable(js_entry_sp), Immediate(0)); | 4552 __ mov(Operand::StaticVariable(js_entry_sp), Immediate(0)); |
4553 __ bind(¬_outermost_js_2); | 4553 __ bind(¬_outermost_js_2); |
4554 | 4554 |
4555 // Restore the top frame descriptor from the stack. | 4555 // Restore the top frame descriptor from the stack. |
4556 __ pop(Operand::StaticVariable(ExternalReference( | 4556 __ pop(Operand::StaticVariable(ExternalReference( |
4557 Isolate::k_c_entry_fp_address, | 4557 Isolate::kCEntryFPAddress, |
4558 masm->isolate()))); | 4558 masm->isolate()))); |
4559 | 4559 |
4560 // Restore callee-saved registers (C calling conventions). | 4560 // Restore callee-saved registers (C calling conventions). |
4561 __ pop(ebx); | 4561 __ pop(ebx); |
4562 __ pop(esi); | 4562 __ pop(esi); |
4563 __ pop(edi); | 4563 __ pop(edi); |
4564 __ add(Operand(esp), Immediate(2 * kPointerSize)); // remove markers | 4564 __ add(Operand(esp), Immediate(2 * kPointerSize)); // remove markers |
4565 | 4565 |
4566 // Restore frame pointer and return. | 4566 // Restore frame pointer and return. |
4567 __ pop(ebp); | 4567 __ pop(ebp); |
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6491 __ Drop(1); | 6491 __ Drop(1); |
6492 __ ret(2 * kPointerSize); | 6492 __ ret(2 * kPointerSize); |
6493 } | 6493 } |
6494 | 6494 |
6495 | 6495 |
6496 #undef __ | 6496 #undef __ |
6497 | 6497 |
6498 } } // namespace v8::internal | 6498 } } // namespace v8::internal |
6499 | 6499 |
6500 #endif // V8_TARGET_ARCH_IA32 | 6500 #endif // V8_TARGET_ARCH_IA32 |
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