d5282dfc41
Summary: Until now AArch64 development has been on patched kernels that have an always on relaxed syscall ABI where tagged pointers are accepted. The patches that have gone into the mainline kernel rely on each process opting in to this relaxed ABI. This commit adds code to choose that ABI into __hwasan_init. The idea has already been agreed with one of the hwasan developers (http://lists.llvm.org/pipermail/llvm-dev/2019-September/135328.html). The patch ignores failures of `EINVAL` for Android, since there are older versions of the Android kernel that don't require this `prctl` or even have the relevant values. Avoiding EINVAL will let the library run on them. I've tested this on an AArch64 VM running a kernel that requires this prctl, having compiled both with clang and gcc. Patch by Matthew Malcomson. Reviewers: eugenis, kcc, pcc Reviewed By: eugenis Subscribers: srhines, kristof.beyls, #sanitizers, llvm-commits Tags: #sanitizers, #llvm Differential Revision: https://reviews.llvm.org/D68794 llvm-svn: 375166
Compiler-RT ================================ This directory and its subdirectories contain source code for the compiler support routines. Compiler-RT is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt. ================================