From: Nick Desaulniers <ndesaulniers@google.com>
To: Russell King <linux@armlinux.org.uk>,
Arnd Bergmann <arnd@kernel.org>, Ard Biesheuvel <ardb@kernel.org>
Cc: clang-built-linux@googlegroups.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Nathan Chancellor <nathan@kernel.org>,
Peter Smith <peter.smith@arm.com>,
Renato Golin <rengolin@systemcall.eu>,
David Spickett <david.spickett@linaro.org>,
Nick Desaulniers <ndesaulniers@google.com>
Subject: [PATCH v5 0/2] ARM: kprobes: asm warning fixes and UAL conversion
Date: Wed, 10 Feb 2021 18:51:47 -0800 [thread overview]
Message-ID: <20210211025149.3544593-1-ndesaulniers@google.com> (raw)
Clang's integrated assembler only supports UAL and rejects instructions
that are UNPREDICTABLE; KernelCI has been warning about those for awhile
now when using GAS (GCC or Clang) for allmodconfig builds.
Changes V4 -> V5:
* Make patch into series.
* Fix the UNPREDICTABLE warnings first.
* Add .syntax unified to fix the GCC build failure reported by 0day bot.
Changes V3 -> V4:
* use __inst_arm for movs based on resolution of
https://reviews.llvm.org/D95586.
Changes V2 -> V3:
* drop changes to test-thumb.c. That file is mutually exclusive with
test-arm.c based on CONFIG_THUMB2_KERNEL. LLVM requires more fixes for
.w suffixes for thumb2 mode.
Changes V1 -> V2:
* Fix additonal swpvsb case in test-arm.c when __LINUX_ARM_ARCH__ < 6,
reported by Arnd.
* Fix arch/arm/probes/kprobes/test-thumb.c, reported by Arnd.
* Modify the oneline to note I'm modifying test-*.c.
Nick Desaulniers (2):
ARM: kprobes: fix UNPREDICTABLE warnings
ARM: kprobes: rewrite test-arm.c in UAL
arch/arm/probes/kprobes/test-arm.c | 294 ++++++++++++++--------------
arch/arm/probes/kprobes/test-core.h | 1 +
2 files changed, 148 insertions(+), 147 deletions(-)
--
2.30.0.478.g8a0d178c01-goog
next reply other threads:[~2021-02-11 2:53 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-11 2:51 Nick Desaulniers [this message]
2021-02-11 2:51 ` [PATCH v5 1/2] ARM: kprobes: fix UNPREDICTABLE warnings Nick Desaulniers
2021-02-11 8:15 ` Ard Biesheuvel
2021-02-11 19:05 ` Nick Desaulniers
2021-02-11 2:51 ` [PATCH v5 2/2] ARM: kprobes: rewrite test-arm.c in UAL Nick Desaulniers
2021-02-11 8:15 ` Ard Biesheuvel
2021-02-11 17:43 ` Nathan Chancellor
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