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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 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/v8.h" | 5 #include "src/v8.h" |
6 | 6 |
7 #if V8_TARGET_ARCH_ARM | 7 #if V8_TARGET_ARCH_ARM |
8 | 8 |
9 #include "src/base/bits.h" | 9 #include "src/base/bits.h" |
10 #include "src/bootstrapper.h" | 10 #include "src/bootstrapper.h" |
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1050 { | 1050 { |
1051 // Prevent literal pool emission before return address. | 1051 // Prevent literal pool emission before return address. |
1052 Assembler::BlockConstPoolScope block_const_pool(masm); | 1052 Assembler::BlockConstPoolScope block_const_pool(masm); |
1053 __ add(lr, pc, Operand(4)); | 1053 __ add(lr, pc, Operand(4)); |
1054 __ str(lr, MemOperand(sp, 0)); | 1054 __ str(lr, MemOperand(sp, 0)); |
1055 __ Call(r5); | 1055 __ Call(r5); |
1056 } | 1056 } |
1057 | 1057 |
1058 __ VFPEnsureFPSCRState(r2); | 1058 __ VFPEnsureFPSCRState(r2); |
1059 | 1059 |
1060 // Runtime functions should not return 'the hole'. Allowing it to escape may | |
1061 // lead to crashes in the IC code later. | |
1062 if (FLAG_debug_code) { | |
1063 Label okay; | |
1064 __ CompareRoot(r0, Heap::kTheHoleValueRootIndex); | |
1065 __ b(ne, &okay); | |
1066 __ stop("The hole escaped"); | |
1067 __ bind(&okay); | |
1068 } | |
1069 | |
1070 // Check result for exception sentinel. | 1060 // Check result for exception sentinel. |
1071 Label exception_returned; | 1061 Label exception_returned; |
1072 __ CompareRoot(r0, Heap::kExceptionRootIndex); | 1062 __ CompareRoot(r0, Heap::kExceptionRootIndex); |
1073 __ b(eq, &exception_returned); | 1063 __ b(eq, &exception_returned); |
1074 | 1064 |
1075 // Check that there is no pending exception, otherwise we | 1065 // Check that there is no pending exception, otherwise we |
1076 // should have returned the exception sentinel. | 1066 // should have returned the exception sentinel. |
1077 if (FLAG_debug_code) { | 1067 if (FLAG_debug_code) { |
1078 Label okay; | 1068 Label okay; |
1079 ExternalReference pending_exception_address( | 1069 ExternalReference pending_exception_address( |
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5050 kStackUnwindSpace, NULL, | 5040 kStackUnwindSpace, NULL, |
5051 MemOperand(fp, 6 * kPointerSize), NULL); | 5041 MemOperand(fp, 6 * kPointerSize), NULL); |
5052 } | 5042 } |
5053 | 5043 |
5054 | 5044 |
5055 #undef __ | 5045 #undef __ |
5056 | 5046 |
5057 } } // namespace v8::internal | 5047 } } // namespace v8::internal |
5058 | 5048 |
5059 #endif // V8_TARGET_ARCH_ARM | 5049 #endif // V8_TARGET_ARCH_ARM |
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