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Fix undefined behavior (shift of negative value) in RuntimeDyldMachOAArch64::encodeAddend.

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Test Plan: regression test suite with/without UBSan.

Reviewers: lhames, ributzka

Subscribers: aemerson, llvm-commits

Differential Revision: http://reviews.llvm.org/D6908

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225568 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alexey Samsonov 2015-01-10 00:46:38 +00:00
parent 6829815d96
commit 2ba0f89d9e
1 changed files with 2 additions and 2 deletions
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4
lib/ExecutionEngine/RuntimeDyld/Targets/RuntimeDyldMachOAArch64.h
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@ -183,8 +183,8 @@ public:
assert(isInt<33>(Addend) && "Invalid page reloc value.");
// Encode the addend into the instruction.
uint32_t ImmLoValue = (uint32_t)(Addend << 17) & 0x60000000;
uint32_t ImmHiValue = (uint32_t)(Addend >> 9) & 0x00FFFFE0;
uint32_t ImmLoValue = ((uint64_t)Addend << 17) & 0x60000000;
uint32_t ImmHiValue = ((uint64_t)Addend >> 9) & 0x00FFFFE0;
*p = (*p & 0x9F00001F) | ImmHiValue | ImmLoValue;
break;
}