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From: Will Deacon <will@kernel.org>
To: linux-arm-kernel@lists.infradead.org
Cc: Will Deacon <will@kernel.org>,
	Tamas Zsoldos <tamas.zsoldos@arm.com>,
	Mark Brown <broonie@kernel.org>,
	kernel-team@android.com, Dave Martin <dave.martin@arm.com>,
	Daniel Kiss <daniel.kiss@arm.com>
Subject: [PATCH v3 0/2] arm64 sigreturn unwinding fixes
Date: Wed, 20 May 2020 18:55:37 +0100	[thread overview]
Message-ID: <20200520175539.28464-1-will@kernel.org> (raw)

Hi folks,

Here is v3 of my attempt at fixing the vdso sigreturn code for unwinders.
Previous versions are available here:

  v1: https://lore.kernel.org/r/20200519121818.14511-1-will@kernel.org
  v2: https://lore.kernel.org/r/20200519162821.16857-1-will@kernel.org

Changes since v2 include:

  * Fix the .cfi directives to identify the link register correctly
  * Even more comments

Daniel, please can you give this a spin with the LLVM unwinder? It should work
this time.

Cheers,

Will

Cc: Dave Martin <dave.martin@arm.com>
Cc: Tamas Zsoldos <tamas.zsoldos@arm.com> 
Cc: Daniel Kiss <daniel.kiss@arm.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: <kernel-team@android.com>

--->8

Will Deacon (2):
  arm64: vdso: Don't prefix sigreturn trampoline with a BTI C
    instruction
  arm64: vdso: Fix CFI directives in sigreturn trampoline

 arch/arm64/include/asm/linkage.h     |  6 ++--
 arch/arm64/kernel/vdso/sigreturn.S   | 51 ++++++++++++++++++++++++----
 arch/arm64/kernel/vdso32/sigreturn.S | 19 ++++++-----
 3 files changed, 58 insertions(+), 18 deletions(-)

-- 
2.26.2.761.g0e0b3e54be-goog


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             reply	other threads:[~2020-05-20 17:56 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-20 17:55 Will Deacon [this message]
2020-05-20 17:55 ` [PATCH v3 1/2] arm64: vdso: Don't prefix sigreturn trampoline with a BTI C instruction Will Deacon
2020-05-20 17:55 ` [PATCH v3 2/2] arm64: vdso: Fix CFI directives in sigreturn trampoline Will Deacon
2020-05-21  9:53 ` [PATCH v3 0/2] arm64 sigreturn unwinding fixes Daniel Kiss

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