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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 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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545 | 545 |
546 // When generating debug code, make sure the lexical context is set. | 546 // When generating debug code, make sure the lexical context is set. |
547 if (FLAG_debug_code) { | 547 if (FLAG_debug_code) { |
548 cmp(Operand(scratch), Immediate(0)); | 548 cmp(Operand(scratch), Immediate(0)); |
549 Check(not_equal, "we should not have an empty lexical context"); | 549 Check(not_equal, "we should not have an empty lexical context"); |
550 } | 550 } |
551 // Load the global context of the current context. | 551 // Load the global context of the current context. |
552 int offset = Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; | 552 int offset = Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; |
553 mov(scratch, FieldOperand(scratch, offset)); | 553 mov(scratch, FieldOperand(scratch, offset)); |
554 mov(scratch, FieldOperand(scratch, GlobalObject::kGlobalContextOffset)); | 554 mov(scratch, FieldOperand(scratch, GlobalObject::kGlobalContextOffset)); |
555 | 555 |
556 // Check the context is a global context. | 556 // Check the context is a global context. |
557 if (FLAG_debug_code) { | 557 if (FLAG_debug_code) { |
558 push(scratch); | 558 push(scratch); |
559 // Read the first word and compare to global_context_map. | 559 // Read the first word and compare to global_context_map. |
560 mov(scratch, FieldOperand(scratch, HeapObject::kMapOffset)); | 560 mov(scratch, FieldOperand(scratch, HeapObject::kMapOffset)); |
561 cmp(scratch, Factory::global_context_map()); | 561 cmp(scratch, Factory::global_context_map()); |
562 Check(equal, "JSGlobalObject::global_context should be a global context."); | 562 Check(equal, "JSGlobalObject::global_context should be a global context."); |
563 pop(scratch); | 563 pop(scratch); |
564 } | 564 } |
565 | 565 |
566 // Check if both contexts are the same. | 566 // Check if both contexts are the same. |
567 cmp(scratch, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); | 567 cmp(scratch, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
568 j(equal, &same_contexts, taken); | 568 j(equal, &same_contexts, taken); |
569 | 569 |
570 // Compare security tokens, save holder_reg on the stack so we can use it | 570 // Compare security tokens, save holder_reg on the stack so we can use it |
571 // as a temporary register. | 571 // as a temporary register. |
572 // | 572 // |
573 // TODO(119): avoid push(holder_reg)/pop(holder_reg) | 573 // TODO(119): avoid push(holder_reg)/pop(holder_reg) |
574 push(holder_reg); | 574 push(holder_reg); |
575 // Check that the security token in the calling global object is | 575 // Check that the security token in the calling global object is |
576 // compatible with the security token in the receiving global | 576 // compatible with the security token in the receiving global |
577 // object. | 577 // object. |
578 mov(holder_reg, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); | 578 mov(holder_reg, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
579 | 579 |
580 // Check the context is a global context. | 580 // Check the context is a global context. |
581 if (FLAG_debug_code) { | 581 if (FLAG_debug_code) { |
582 cmp(holder_reg, Factory::null_value()); | 582 cmp(holder_reg, Factory::null_value()); |
583 Check(not_equal, "JSGlobalProxy::context() should not be null."); | 583 Check(not_equal, "JSGlobalProxy::context() should not be null."); |
584 | 584 |
585 push(holder_reg); | 585 push(holder_reg); |
586 // Read the first word and compare to global_context_map(), | 586 // Read the first word and compare to global_context_map(), |
587 mov(holder_reg, FieldOperand(holder_reg, HeapObject::kMapOffset)); | 587 mov(holder_reg, FieldOperand(holder_reg, HeapObject::kMapOffset)); |
588 cmp(holder_reg, Factory::global_context_map()); | 588 cmp(holder_reg, Factory::global_context_map()); |
589 Check(equal, "JSGlobalObject::global_context should be a global context."); | 589 Check(equal, "JSGlobalObject::global_context should be a global context."); |
590 pop(holder_reg); | 590 pop(holder_reg); |
591 } | 591 } |
592 | 592 |
593 int token_offset = Context::kHeaderSize + | 593 int token_offset = Context::kHeaderSize + |
594 Context::SECURITY_TOKEN_INDEX * kPointerSize; | 594 Context::SECURITY_TOKEN_INDEX * kPointerSize; |
595 mov(scratch, FieldOperand(scratch, token_offset)); | 595 mov(scratch, FieldOperand(scratch, token_offset)); |
596 cmp(scratch, FieldOperand(holder_reg, token_offset)); | 596 cmp(scratch, FieldOperand(holder_reg, token_offset)); |
597 pop(holder_reg); | 597 pop(holder_reg); |
598 j(not_equal, miss, not_taken); | 598 j(not_equal, miss, not_taken); |
599 | 599 |
600 bind(&same_contexts); | 600 bind(&same_contexts); |
601 } | 601 } |
602 | 602 |
603 | 603 |
604 void MacroAssembler::NegativeZeroTest(Register result, | 604 void MacroAssembler::NegativeZeroTest(Register result, |
605 Register op, | 605 Register op, |
606 Label* then_label) { | 606 Label* then_label) { |
607 Label ok; | 607 Label ok; |
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1005 // Indicate that code has changed. | 1005 // Indicate that code has changed. |
1006 CPU::FlushICache(address_, size_); | 1006 CPU::FlushICache(address_, size_); |
1007 | 1007 |
1008 // Check that the code was patched as expected. | 1008 // Check that the code was patched as expected. |
1009 ASSERT(masm_.pc_ == address_ + size_); | 1009 ASSERT(masm_.pc_ == address_ + size_); |
1010 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); | 1010 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
1011 } | 1011 } |
1012 | 1012 |
1013 | 1013 |
1014 } } // namespace v8::internal | 1014 } } // namespace v8::internal |
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