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Issue 396463003: Move some isolate state setup from C++ code to JumpToExceptionHandler stub (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Created 6 years, 5 months ago
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1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a 2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file. 3 // BSD-style license that can be found in the LICENSE file.
4 4
5 #include "vm/globals.h" 5 #include "vm/globals.h"
6 #if defined(TARGET_ARCH_ARM64) 6 #if defined(TARGET_ARCH_ARM64)
7 7
8 #include "vm/assembler.h" 8 #include "vm/assembler.h"
9 #include "vm/code_generator.h" 9 #include "vm/code_generator.h"
10 #include "vm/compiler.h" 10 #include "vm/compiler.h"
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1812 } 1812 }
1813 1813
1814 1814
1815 // Jump to the exception or error handler. 1815 // Jump to the exception or error handler.
1816 // LR: return address. 1816 // LR: return address.
1817 // R0: program_counter. 1817 // R0: program_counter.
1818 // R1: stack_pointer. 1818 // R1: stack_pointer.
1819 // R2: frame_pointer. 1819 // R2: frame_pointer.
1820 // R3: error object. 1820 // R3: error object.
1821 // R4: address of stacktrace object. 1821 // R4: address of stacktrace object.
1822 // R5: isolate.
1822 // Does not return. 1823 // Does not return.
1823 void StubCode::GenerateJumpToExceptionHandlerStub(Assembler* assembler) { 1824 void StubCode::GenerateJumpToExceptionHandlerStub(Assembler* assembler) {
1824 ASSERT(kExceptionObjectReg == R0); 1825 ASSERT(kExceptionObjectReg == R0);
1825 ASSERT(kStackTraceObjectReg == R1); 1826 ASSERT(kStackTraceObjectReg == R1);
1826 __ mov(LR, R0); // Program counter. 1827 __ mov(LR, R0); // Program counter.
1827 __ mov(SP, R1); // Stack pointer. 1828 __ mov(SP, R1); // Stack pointer.
1828 __ mov(FP, R2); // Frame_pointer. 1829 __ mov(FP, R2); // Frame_pointer.
1829 __ mov(R0, R3); // Exception object. 1830 __ mov(R0, R3); // Exception object.
1830 __ mov(R1, R4); // StackTrace object. 1831 __ mov(R1, R4); // StackTrace object.
1832 // Set the tag.
1833 __ LoadImmediate(R2, VMTag::kScriptTagId, kNoPP);
1834 __ StoreToOffset(R2, R5, Isolate::vm_tag_offset(), kNoPP);
1835 // Clear top exit frame.
1836 __ StoreToOffset(ZR, R5, Isolate::top_exit_frame_info_offset(), kNoPP);
1831 __ ret(); // Jump to the exception handler code. 1837 __ ret(); // Jump to the exception handler code.
1832 } 1838 }
1833 1839
1834 1840
1835 // Calls to the runtime to optimize the given function. 1841 // Calls to the runtime to optimize the given function.
1836 // R6: function to be re-optimized. 1842 // R6: function to be re-optimized.
1837 // R4: argument descriptor (preserved). 1843 // R4: argument descriptor (preserved).
1838 void StubCode::GenerateOptimizeFunctionStub(Assembler* assembler) { 1844 void StubCode::GenerateOptimizeFunctionStub(Assembler* assembler) {
1839 __ EnterStubFrame(); 1845 __ EnterStubFrame();
1840 __ Push(R4); 1846 __ Push(R4);
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1961 const Register right = R0; 1967 const Register right = R0;
1962 __ LoadFromOffset(left, SP, 1 * kWordSize, kNoPP); 1968 __ LoadFromOffset(left, SP, 1 * kWordSize, kNoPP);
1963 __ LoadFromOffset(right, SP, 0 * kWordSize, kNoPP); 1969 __ LoadFromOffset(right, SP, 0 * kWordSize, kNoPP);
1964 GenerateIdenticalWithNumberCheckStub(assembler, left, right, temp); 1970 GenerateIdenticalWithNumberCheckStub(assembler, left, right, temp);
1965 __ ret(); 1971 __ ret();
1966 } 1972 }
1967 1973
1968 } // namespace dart 1974 } // namespace dart
1969 1975
1970 #endif // defined TARGET_ARCH_ARM64 1976 #endif // defined TARGET_ARCH_ARM64
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