From: liuhongt <hongtao.liu@intel.com>
To: gcc-patches@gcc.gnu.org
Cc: crazylht@gmail.com, hjl.tools@gmail.com, ubizjak@gmail.com
Subject: [PATCH 0/2] Support HWASAN with Intel LAM
Date: Fri, 11 Nov 2022 09:26:29 +0800 [thread overview]
Message-ID: <20221111012631.76776-1-hongtao.liu@intel.com> (raw)
2 years ago, ARM folks support HWASAN[1] in GCC[2], and introduced several
target hooks(Many thanks to their work) so other backends can do similar
things if they have similar feature.
Intel LAM(linear Address Masking)[3 Charpter 14] supports similar feature with
the upper bits of pointers can be used as metadata, LAM support two modes:
LAM_U48:bits 48-62 can be used as metadata
LAM_U57:bits 57-62 can be used as metedata.
These 2 patches mainly support those target hooks, but HWASAN is not really
enabled until the final decision for the LAM kernel interface which may take
quite a long time. We have verified our patches with a "fake" interface locally[4], and
decided to push the backend patches to the GCC13 to make other HWASAN developper's work
easy.
[1] https://clang.llvm.org/docs/HardwareAssistedAddressSanitizerDesign.html
[2] https://gcc.gnu.org/pipermail/gcc-patches/2020-November/557857.html
[3] https://www.intel.com/content/dam/develop/external/us/en/documents/architecture-instruction-set-extensions-programming-reference.pdf
[4] https://gitlab.com/x86-gcc/gcc/-/tree/users/intel/lam/master
Bootstrapped and regtested on x86_64-pc-linux-gnu{-m32,}.
Ok for trunk?
liuhongt (2):
Implement hwasan target_hook.
Enable hwasan for x86-64.
gcc/config/i386/i386-expand.cc | 12 ++++
gcc/config/i386/i386-options.cc | 3 +
gcc/config/i386/i386-opts.h | 6 ++
gcc/config/i386/i386-protos.h | 2 +
gcc/config/i386/i386.cc | 123 ++++++++++++++++++++++++++++++++
gcc/config/i386/i386.opt | 16 +++++
libsanitizer/configure.tgt | 1 +
7 files changed, 163 insertions(+)
--
2.18.1
next reply other threads:[~2022-11-11 1:26 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-11 1:26 liuhongt [this message]
2022-11-11 1:26 ` [PATCH 1/2] Implement hwasan target_hook liuhongt
2022-11-30 5:21 ` [PATCH 1/2 V2] " liuhongt
2022-11-11 1:26 ` [PATCH 2/2] Enable hwasan for x86-64 liuhongt
2022-11-28 3:35 ` [PATCH 0/2] Support HWASAN with Intel LAM Hongtao Liu
2022-11-28 7:12 ` Uros Bizjak
2022-11-28 14:40 ` Martin Liška
2022-11-29 2:10 ` H.J. Lu
2022-11-29 2:37 ` Hongtao Liu
2022-11-30 14:07 ` Martin Liška
2022-12-09 2:04 ` Hongtao Liu
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