[MCJIT] Respect target endianness in RuntimeDyldMachO and RuntimeDyldChecker.
This patch may address some of the issues described in http://llvm.org/PR20640.
llvm-svn: 215938
diff --git a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp
index d244f45..02504a9 100644
--- a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp
+++ b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldChecker.cpp
@@ -705,7 +705,16 @@
assert(PtrSizedAddr == SrcAddr && "Linker memory pointer out-of-range.");
uint8_t *Src = reinterpret_cast<uint8_t *>(PtrSizedAddr);
uint64_t Result = 0;
- memcpy(&Result, Src, Size);
+
+ // If host and target endianness match use memcpy, otherwise copy in reverse
+ // order.
+ if (getRTDyld().IsTargetLittleEndian == sys::IsLittleEndianHost)
+ memcpy(&Result, Src, Size);
+ else {
+ uint8_t *Dst = reinterpret_cast<uint8_t*>(&Result) + Size - 1;
+ for (unsigned i = 0; i < Size; ++i)
+ *Dst-- = *Src++;
+ }
return Result;
}