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1 // Copyright 2009 the V8 project authors. All rights reserved. | 1 // Copyright 2009 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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714 movq(rdi, rax); // Backup rax before we use it. | 714 movq(rdi, rax); // Backup rax before we use it. |
715 | 715 |
716 movq(rax, rbp); | 716 movq(rax, rbp); |
717 store_rax(c_entry_fp_address); | 717 store_rax(c_entry_fp_address); |
718 movq(rax, rsi); | 718 movq(rax, rsi); |
719 store_rax(context_address); | 719 store_rax(context_address); |
720 | 720 |
721 // Setup argv in callee-saved register r15. It is reused in LeaveExitFrame, | 721 // Setup argv in callee-saved register r15. It is reused in LeaveExitFrame, |
722 // so it must be retained across the C-call. | 722 // so it must be retained across the C-call. |
723 int offset = StandardFrameConstants::kCallerSPOffset - kPointerSize; | 723 int offset = StandardFrameConstants::kCallerSPOffset - kPointerSize; |
724 lea(r15, Operand(rbp, rdi, kTimesPointerSize, offset)); | 724 lea(r15, Operand(rbp, rdi, times_pointer_size, offset)); |
725 | 725 |
726 #ifdef ENABLE_DEBUGGER_SUPPORT | 726 #ifdef ENABLE_DEBUGGER_SUPPORT |
727 // Save the state of all registers to the stack from the memory | 727 // Save the state of all registers to the stack from the memory |
728 // location. This is needed to allow nested break points. | 728 // location. This is needed to allow nested break points. |
729 if (type == StackFrame::EXIT_DEBUG) { | 729 if (type == StackFrame::EXIT_DEBUG) { |
730 // TODO(1243899): This should be symmetric to | 730 // TODO(1243899): This should be symmetric to |
731 // CopyRegistersFromStackToMemory() but it isn't! esp is assumed | 731 // CopyRegistersFromStackToMemory() but it isn't! esp is assumed |
732 // correct here, but computed for the other call. Very error | 732 // correct here, but computed for the other call. Very error |
733 // prone! FIX THIS. Actually there are deeper problems with | 733 // prone! FIX THIS. Actually there are deeper problems with |
734 // register saving than this asymmetry (see the bug report | 734 // register saving than this asymmetry (see the bug report |
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788 push(rcx); | 788 push(rcx); |
789 | 789 |
790 // Clear the top frame. | 790 // Clear the top frame. |
791 ExternalReference c_entry_fp_address(Top::k_c_entry_fp_address); | 791 ExternalReference c_entry_fp_address(Top::k_c_entry_fp_address); |
792 movq(kScratchRegister, c_entry_fp_address); | 792 movq(kScratchRegister, c_entry_fp_address); |
793 movq(Operand(kScratchRegister, 0), Immediate(0)); | 793 movq(Operand(kScratchRegister, 0), Immediate(0)); |
794 } | 794 } |
795 | 795 |
796 | 796 |
797 } } // namespace v8::internal | 797 } } // namespace v8::internal |
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