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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 // 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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| 431 // patch with the code required by the debugger. | 431 // patch with the code required by the debugger. |
| 432 __ movp(rsp, rbp); | 432 __ movp(rsp, rbp); |
| 433 __ popq(rbp); | 433 __ popq(rbp); |
| 434 int no_frame_start = masm_->pc_offset(); | 434 int no_frame_start = masm_->pc_offset(); |
| 435 | 435 |
| 436 int arguments_bytes = (info_->scope()->num_parameters() + 1) * kPointerSize; | 436 int arguments_bytes = (info_->scope()->num_parameters() + 1) * kPointerSize; |
| 437 __ Ret(arguments_bytes, rcx); | 437 __ Ret(arguments_bytes, rcx); |
| 438 | 438 |
| 439 #ifdef ENABLE_DEBUGGER_SUPPORT | 439 #ifdef ENABLE_DEBUGGER_SUPPORT |
| 440 // Add padding that will be overwritten by a debugger breakpoint. We | 440 // Add padding that will be overwritten by a debugger breakpoint. We |
| 441 // have just generated at least 7 bytes: "movp rsp, rbp; pop rbp; ret k" | 441 // have just generated at least 7 bytes: "movq rsp, rbp; pop rbp; ret k" |
| 442 // (3 + 1 + 3) for x64 and at least 6 (2 + 1 + 3) bytes for x32. | 442 // (3 + 1 + 3). |
| 443 const int kPadding = Assembler::kJSReturnSequenceLength - | 443 const int kPadding = Assembler::kJSReturnSequenceLength - 7; |
| 444 kPointerSize == kInt64Size ? 7 : 6; | |
| 445 for (int i = 0; i < kPadding; ++i) { | 444 for (int i = 0; i < kPadding; ++i) { |
| 446 masm_->int3(); | 445 masm_->int3(); |
| 447 } | 446 } |
| 448 // Check that the size of the code used for returning is large enough | 447 // Check that the size of the code used for returning is large enough |
| 449 // for the debugger's requirements. | 448 // for the debugger's requirements. |
| 450 ASSERT(Assembler::kJSReturnSequenceLength <= | 449 ASSERT(Assembler::kJSReturnSequenceLength <= |
| 451 masm_->SizeOfCodeGeneratedSince(&check_exit_codesize)); | 450 masm_->SizeOfCodeGeneratedSince(&check_exit_codesize)); |
| 452 #endif | 451 #endif |
| 453 info_->AddNoFrameRange(no_frame_start, masm_->pc_offset()); | 452 info_->AddNoFrameRange(no_frame_start, masm_->pc_offset()); |
| 454 } | 453 } |
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| 4837 *stack_depth = 0; | 4836 *stack_depth = 0; |
| 4838 *context_length = 0; | 4837 *context_length = 0; |
| 4839 return previous_; | 4838 return previous_; |
| 4840 } | 4839 } |
| 4841 | 4840 |
| 4842 | 4841 |
| 4843 #undef __ | 4842 #undef __ |
| 4844 | 4843 |
| 4845 | 4844 |
| 4846 static const byte kJnsInstruction = 0x79; | 4845 static const byte kJnsInstruction = 0x79; |
| 4847 static const byte kJnsOffset = kPointerSize == kInt64Size ? 0x1d : 0x14; | 4846 static const byte kJnsOffset = 0x1d; |
| 4848 static const byte kNopByteOne = 0x66; | 4847 static const byte kNopByteOne = 0x66; |
| 4849 static const byte kNopByteTwo = 0x90; | 4848 static const byte kNopByteTwo = 0x90; |
| 4850 #ifdef DEBUG | 4849 #ifdef DEBUG |
| 4851 static const byte kCallInstruction = 0xe8; | 4850 static const byte kCallInstruction = 0xe8; |
| 4852 #endif | 4851 #endif |
| 4853 | 4852 |
| 4854 | 4853 |
| 4855 void BackEdgeTable::PatchAt(Code* unoptimized_code, | 4854 void BackEdgeTable::PatchAt(Code* unoptimized_code, |
| 4856 Address pc, | 4855 Address pc, |
| 4857 BackEdgeState target_state, | 4856 BackEdgeState target_state, |
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| 4917 ASSERT_EQ(isolate->builtins()->OsrAfterStackCheck()->entry(), | 4916 ASSERT_EQ(isolate->builtins()->OsrAfterStackCheck()->entry(), |
| 4918 Assembler::target_address_at(call_target_address, | 4917 Assembler::target_address_at(call_target_address, |
| 4919 unoptimized_code)); | 4918 unoptimized_code)); |
| 4920 return OSR_AFTER_STACK_CHECK; | 4919 return OSR_AFTER_STACK_CHECK; |
| 4921 } | 4920 } |
| 4922 | 4921 |
| 4923 | 4922 |
| 4924 } } // namespace v8::internal | 4923 } } // namespace v8::internal |
| 4925 | 4924 |
| 4926 #endif // V8_TARGET_ARCH_X64 | 4925 #endif // V8_TARGET_ARCH_X64 |
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