[PATCH] D92396: [ARM] Implement harden-sls-retbr for Thumb mode
Kristof Beyls via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Tue Dec 1 08:21:10 PST 2020
kristof.beyls created this revision.
kristof.beyls added a reviewer: ostannard.
Herald added subscribers: llvm-commits, danielkiss, hiraditya.
Herald added a project: LLVM.
kristof.beyls requested review of this revision.
The only non-trivial consideration in this patch is that the formation
of TBB/TBH instructions, which is done in the constant island pass, does
not understand the speculation barriers inserted by the SLSHardening
pass. As such, when harden-sls-retbr is enabled for a function, the
formation of TBB/TBH instructions in the constant island pass is
disabled.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D92396
Files:
llvm/lib/Target/ARM/ARMAsmPrinter.cpp
llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp
llvm/lib/Target/ARM/ARMBaseInstrInfo.h
llvm/lib/Target/ARM/ARMConstantIslandPass.cpp
llvm/lib/Target/ARM/ARMInstrThumb2.td
llvm/lib/Target/ARM/ARMSLSHardening.cpp
llvm/test/CodeGen/ARM/speculation-hardening-sls.ll
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