[HWASan] Port HWASan to Linux x86-64 (LLVM)
Summary:
Porting HWASan to Linux x86-64, first of the three patches, LLVM part.
The approach is similar to ARM case, trap signal is used to communicate
memory tag check failure. int3 instruction is used to generate a signal,
access parameters are stored in nop [eax + offset] instruction immediately
following the int3 one.
One notable difference is that x86-64 has to untag the pointer before use
due to the lack of feature comparable to ARM's TBI (Top Byte Ignore).
Reviewers: eugenis
Subscribers: kristof.beyls, llvm-commits
Differential Revision: https://reviews.llvm.org/D44699
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@328342 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed