// x86_64 Linux
static const MemoryMapParams Linux_X86_64_MemoryMapParams = {
+#ifdef MSAN_LINUX_X86_64_OLD_MAPPING
0x400000000000, // AndMask
0, // XorMask (not used)
0, // ShadowBase (not used)
0x200000000000, // OriginBase
+#else
+ 0, // AndMask (not used)
+ 0x500000000000, // XorMask
+ 0, // ShadowBase (not used)
+ 0x100000000000, // OriginBase
+#endif
};
// mips64 Linux
///
/// Offset = (Addr & ~AndMask) ^ XorMask
Value *getShadowPtrOffset(Value *Addr, IRBuilder<> &IRB) {
+ Value *OffsetLong = IRB.CreatePointerCast(Addr, MS.IntptrTy);
+
uint64_t AndMask = MS.MapParams->AndMask;
- assert(AndMask != 0 && "AndMask shall be specified");
- Value *OffsetLong =
- IRB.CreateAnd(IRB.CreatePointerCast(Addr, MS.IntptrTy),
- ConstantInt::get(MS.IntptrTy, ~AndMask));
+ if (AndMask)
+ OffsetLong =
+ IRB.CreateAnd(OffsetLong, ConstantInt::get(MS.IntptrTy, ~AndMask));
uint64_t XorMask = MS.MapParams->XorMask;
- if (XorMask != 0)
- OffsetLong = IRB.CreateXor(OffsetLong,
- ConstantInt::get(MS.IntptrTy, XorMask));
+ if (XorMask)
+ OffsetLong =
+ IRB.CreateXor(OffsetLong, ConstantInt::get(MS.IntptrTy, XorMask));
return OffsetLong;
}