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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, 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_ARM) | 6 #if defined(TARGET_ARCH_ARM) |
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/cpu.h" | 10 #include "vm/cpu.h" |
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1678 __ Ret(); | 1678 __ Ret(); |
1679 } | 1679 } |
1680 | 1680 |
1681 | 1681 |
1682 // Jump to the exception or error handler. | 1682 // Jump to the exception or error handler. |
1683 // LR: return address. | 1683 // LR: return address. |
1684 // R0: program_counter. | 1684 // R0: program_counter. |
1685 // R1: stack_pointer. | 1685 // R1: stack_pointer. |
1686 // R2: frame_pointer. | 1686 // R2: frame_pointer. |
1687 // R3: error object. | 1687 // R3: error object. |
1688 // SP: address of stacktrace object. | 1688 // SP + 0: address of stacktrace object. |
1689 // SP + 4: isolate | |
1689 // Does not return. | 1690 // Does not return. |
1690 void StubCode::GenerateJumpToExceptionHandlerStub(Assembler* assembler) { | 1691 void StubCode::GenerateJumpToExceptionHandlerStub(Assembler* assembler) { |
1691 ASSERT(kExceptionObjectReg == R0); | 1692 ASSERT(kExceptionObjectReg == R0); |
1692 ASSERT(kStackTraceObjectReg == R1); | 1693 ASSERT(kStackTraceObjectReg == R1); |
1693 __ mov(IP, Operand(R1)); // Stack pointer. | 1694 __ mov(IP, Operand(R1)); // Stack pointer. |
1694 __ mov(LR, Operand(R0)); // Program counter. | 1695 __ mov(LR, Operand(R0)); // Program counter. |
1695 __ mov(R0, Operand(R3)); // Exception object. | 1696 __ mov(R0, Operand(R3)); // Exception object. |
1696 __ ldr(R1, Address(SP, 0)); // StackTrace object. | 1697 __ ldr(R1, Address(SP, 0)); // StackTrace object. |
1698 __ ldr(CTX, Address(SP, 4)); // Isolate. | |
regis
2014/07/14 20:00:34
Are you sure it is OK to trash the CTX register? I
Cutch
2014/07/14 21:32:07
Done.
| |
1697 __ mov(FP, Operand(R2)); // Frame_pointer. | 1699 __ mov(FP, Operand(R2)); // Frame_pointer. |
1698 __ mov(SP, Operand(IP)); // Stack pointer. | 1700 __ mov(SP, Operand(IP)); // Stack pointer. |
1701 // Set the tag. | |
1702 __ LoadImmediate(R2, VMTag::kScriptTagId); | |
1703 __ StoreToOffset(kWord, R2, CTX, Isolate::vm_tag_offset()); | |
1704 // Clear top exit frame. | |
1705 __ LoadImmediate(R2, 0); | |
1706 __ StoreToOffset(kWord, R2, CTX, Isolate::top_exit_frame_info_offset()); | |
1699 __ bx(LR); // Jump to the exception handler code. | 1707 __ bx(LR); // Jump to the exception handler code. |
1700 } | 1708 } |
1701 | 1709 |
1702 | 1710 |
1703 // Calls to the runtime to optimize the given function. | 1711 // Calls to the runtime to optimize the given function. |
1704 // R6: function to be reoptimized. | 1712 // R6: function to be reoptimized. |
1705 // R4: argument descriptor (preserved). | 1713 // R4: argument descriptor (preserved). |
1706 void StubCode::GenerateOptimizeFunctionStub(Assembler* assembler) { | 1714 void StubCode::GenerateOptimizeFunctionStub(Assembler* assembler) { |
1707 __ EnterStubFrame(); | 1715 __ EnterStubFrame(); |
1708 __ Push(R4); | 1716 __ Push(R4); |
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1837 const Register right = R0; | 1845 const Register right = R0; |
1838 __ ldr(left, Address(SP, 1 * kWordSize)); | 1846 __ ldr(left, Address(SP, 1 * kWordSize)); |
1839 __ ldr(right, Address(SP, 0 * kWordSize)); | 1847 __ ldr(right, Address(SP, 0 * kWordSize)); |
1840 GenerateIdenticalWithNumberCheckStub(assembler, left, right, temp); | 1848 GenerateIdenticalWithNumberCheckStub(assembler, left, right, temp); |
1841 __ Ret(); | 1849 __ Ret(); |
1842 } | 1850 } |
1843 | 1851 |
1844 } // namespace dart | 1852 } // namespace dart |
1845 | 1853 |
1846 #endif // defined TARGET_ARCH_ARM | 1854 #endif // defined TARGET_ARCH_ARM |
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