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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_X64) | 6 #if defined(TARGET_ARCH_X64) |
7 | 7 |
8 #include "vm/assembler.h" | 8 #include "vm/assembler.h" |
9 #include "vm/compiler.h" | 9 #include "vm/compiler.h" |
10 #include "vm/dart_entry.h" | 10 #include "vm/dart_entry.h" |
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446 // Code above cannot cause GC. | 446 // Code above cannot cause GC. |
447 // There is a Dart Frame on the stack. We just need the PP. | 447 // There is a Dart Frame on the stack. We just need the PP. |
448 __ movq(PP, Address(RBP, -2 * kWordSize)); | 448 __ movq(PP, Address(RBP, -2 * kWordSize)); |
449 __ LeaveFrame(); | 449 __ LeaveFrame(); |
450 | 450 |
451 // Frame is fully rewritten at this point and it is safe to perform a GC. | 451 // Frame is fully rewritten at this point and it is safe to perform a GC. |
452 // Materialize any objects that were deferred by FillFrame because they | 452 // Materialize any objects that were deferred by FillFrame because they |
453 // require allocation. | 453 // require allocation. |
454 __ EnterStubFrame(); | 454 __ EnterStubFrame(); |
455 if (preserve_result) { | 455 if (preserve_result) { |
| 456 __ pushq(Immediate(0)); // Workaround for dropped stack slot during GC. |
456 __ pushq(RBX); // Preserve result, it will be GC-d here. | 457 __ pushq(RBX); // Preserve result, it will be GC-d here. |
457 } | 458 } |
458 __ pushq(Immediate(Smi::RawValue(0))); // Space for the result. | 459 __ pushq(Immediate(Smi::RawValue(0))); // Space for the result. |
459 __ CallRuntime(kDeoptimizeMaterializeRuntimeEntry, 0); | 460 __ CallRuntime(kDeoptimizeMaterializeRuntimeEntry, 0); |
460 // Result tells stub how many bytes to remove from the expression stack | 461 // Result tells stub how many bytes to remove from the expression stack |
461 // of the bottom-most frame. They were used as materialization arguments. | 462 // of the bottom-most frame. They were used as materialization arguments. |
462 __ popq(RBX); | 463 __ popq(RBX); |
463 __ SmiUntag(RBX); | 464 __ SmiUntag(RBX); |
464 if (preserve_result) { | 465 if (preserve_result) { |
465 __ popq(RAX); // Restore result. | 466 __ popq(RAX); // Restore result. |
| 467 __ Drop(1); // Workaround for dropped stack slot during GC. |
466 } | 468 } |
467 __ LeaveFrame(); | 469 __ LeaveFrame(); |
468 | 470 |
469 __ popq(RCX); // Pop return address. | 471 __ popq(RCX); // Pop return address. |
470 __ addq(RSP, RBX); // Remove materialization arguments. | 472 __ addq(RSP, RBX); // Remove materialization arguments. |
471 __ pushq(RCX); // Push return address. | 473 __ pushq(RCX); // Push return address. |
472 __ ret(); | 474 __ ret(); |
473 } | 475 } |
474 | 476 |
475 | 477 |
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1813 __ popq(RCX); // Restore IC data array. | 1815 __ popq(RCX); // Restore IC data array. |
1814 __ popq(RDX); // Restore arguments descriptor array. | 1816 __ popq(RDX); // Restore arguments descriptor array. |
1815 __ LeaveFrame(); | 1817 __ LeaveFrame(); |
1816 __ ret(); | 1818 __ ret(); |
1817 } | 1819 } |
1818 | 1820 |
1819 | 1821 |
1820 // RBX, R10: May contain arguments to runtime stub. | 1822 // RBX, R10: May contain arguments to runtime stub. |
1821 // TOS(0): return address (Dart code). | 1823 // TOS(0): return address (Dart code). |
1822 void StubCode::GenerateBreakpointRuntimeStub(Assembler* assembler) { | 1824 void StubCode::GenerateBreakpointRuntimeStub(Assembler* assembler) { |
1823 __ EnterStubFrame(); | 1825 __ EnterStubFrameWithPP(); |
1824 // Preserve runtime args. | 1826 // Preserve runtime args. |
1825 __ pushq(RBX); | 1827 __ pushq(RBX); |
1826 __ pushq(R10); | 1828 __ pushq(R10); |
1827 // Room for result. Debugger stub returns address of the | 1829 // Room for result. Debugger stub returns address of the |
1828 // unpatched runtime stub. | 1830 // unpatched runtime stub. |
1829 __ LoadObject(R12, Object::null_object(), PP); | 1831 __ LoadObject(R12, Object::null_object(), PP); |
1830 __ pushq(R12); // Room for result. | 1832 __ pushq(R12); // Room for result. |
1831 __ CallRuntime(kBreakpointRuntimeHandlerRuntimeEntry, 0); | 1833 __ CallRuntime(kBreakpointRuntimeHandlerRuntimeEntry, 0); |
1832 __ popq(RAX); // Address of original. | 1834 __ popq(RAX); // Address of original. |
1833 __ popq(R10); // Restore arguments. | 1835 __ popq(R10); // Restore arguments. |
1834 __ popq(RBX); | 1836 __ popq(RBX); |
1835 __ LeaveFrame(); | 1837 __ LeaveFrameWithPP(); |
1836 __ jmp(RAX); // Jump to original stub. | 1838 __ jmp(RAX); // Jump to original stub. |
1837 } | 1839 } |
1838 | 1840 |
1839 | 1841 |
1840 // RBX: ICData (unoptimized static call) | 1842 // RBX: ICData (unoptimized static call) |
1841 // TOS(0): return address (Dart code). | 1843 // TOS(0): return address (Dart code). |
1842 void StubCode::GenerateBreakpointStaticStub(Assembler* assembler) { | 1844 void StubCode::GenerateBreakpointStaticStub(Assembler* assembler) { |
1843 __ EnterStubFrame(); | 1845 __ EnterStubFrame(); |
1844 __ LoadObject(R12, Object::null_object(), PP); | 1846 __ LoadObject(R12, Object::null_object(), PP); |
1845 __ pushq(RBX); // Preserve IC data for unoptimized call. | 1847 __ pushq(RBX); // Preserve IC data for unoptimized call. |
1846 __ pushq(R12); // Room for result. | 1848 __ pushq(R12); // Room for result. |
1847 __ CallRuntime(kBreakpointStaticHandlerRuntimeEntry, 0); | 1849 __ CallRuntime(kBreakpointStaticHandlerRuntimeEntry, 0); |
1848 __ popq(RAX); // Code object. | 1850 __ popq(RAX); // Code object. |
1849 __ popq(RBX); // Restore IC data. | 1851 __ popq(RBX); // Restore IC data. |
1850 __ LeaveFrame(); | 1852 __ LeaveFrame(); |
1851 | 1853 |
1852 // Load arguments descriptor into R10. | 1854 // Load arguments descriptor into R10. |
1853 __ movq(R10, FieldAddress(RBX, ICData::arguments_descriptor_offset())); | 1855 __ movq(R10, FieldAddress(RBX, ICData::arguments_descriptor_offset())); |
1854 // Now call the static function. The breakpoint handler function | 1856 // Now call the static function. The breakpoint handler function |
1855 // ensures that the call target is compiled. | 1857 // ensures that the call target is compiled. |
1856 __ movq(RBX, FieldAddress(RAX, Code::instructions_offset())); | 1858 __ movq(RBX, FieldAddress(RAX, Code::instructions_offset())); |
1857 __ addq(RBX, Immediate(Instructions::HeaderSize() - kHeapObjectTag)); | 1859 __ addq(RBX, Immediate(Instructions::HeaderSize() - kHeapObjectTag)); |
1858 __ jmp(RBX); | 1860 __ jmp(RBX); |
1859 } | 1861 } |
1860 | 1862 |
1861 | 1863 |
1862 // TOS(0): return address (Dart code). | 1864 // TOS(0): return address (Dart code). |
1863 void StubCode::GenerateBreakpointReturnStub(Assembler* assembler) { | 1865 void StubCode::GenerateBreakpointReturnStub(Assembler* assembler) { |
1864 __ EnterStubFrame(); | 1866 __ EnterStubFrameWithPP(); |
1865 __ pushq(RAX); | 1867 __ pushq(RAX); |
1866 __ CallRuntime(kBreakpointReturnHandlerRuntimeEntry, 0); | 1868 __ CallRuntime(kBreakpointReturnHandlerRuntimeEntry, 0); |
1867 __ popq(RAX); | 1869 __ popq(RAX); |
1868 __ LeaveFrame(); | 1870 __ LeaveFrameWithPP(); |
1869 | 1871 |
1870 __ popq(R11); // discard return address of call to this stub. | 1872 __ popq(R11); // discard return address of call to this stub. |
1871 __ LeaveFrameWithPP(); | 1873 __ LeaveFrameWithPP(); |
1872 __ ret(); | 1874 __ ret(); |
1873 } | 1875 } |
1874 | 1876 |
1875 | 1877 |
1876 // RBX: Inline cache data array. | 1878 // RBX: Inline cache data array. |
1877 // TOS(0): return address (Dart code). | 1879 // TOS(0): return address (Dart code). |
1878 void StubCode::GenerateBreakpointDynamicStub(Assembler* assembler) { | 1880 void StubCode::GenerateBreakpointDynamicStub(Assembler* assembler) { |
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2169 __ movq(right, Address(RSP, 3 * kWordSize)); | 2171 __ movq(right, Address(RSP, 3 * kWordSize)); |
2170 GenerateIdenticalWithNumberCheckStub(assembler, left, right); | 2172 GenerateIdenticalWithNumberCheckStub(assembler, left, right); |
2171 __ popq(right); | 2173 __ popq(right); |
2172 __ popq(left); | 2174 __ popq(left); |
2173 __ ret(); | 2175 __ ret(); |
2174 } | 2176 } |
2175 | 2177 |
2176 } // namespace dart | 2178 } // namespace dart |
2177 | 2179 |
2178 #endif // defined TARGET_ARCH_X64 | 2180 #endif // defined TARGET_ARCH_X64 |
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