From: Will Deacon <will@kernel.org>
To: linux-arm-kernel@lists.infradead.org
Cc: Mark Rutland <mark.rutland@arm.com>,
kernel-team@android.com, Luis Machado <luis.machado@linaro.org>,
Will Deacon <will@kernel.org>,
Keno Fischer <keno@juliacomputing.com>
Subject: [PATCH v2 0/4] arm64: Fix single-step handling
Date: Thu, 2 Jul 2020 22:26:14 +0100 [thread overview]
Message-ID: <20200702212618.17800-1-will@kernel.org> (raw)
Hi all,
This is version two of the patches I previously posted here:
v1: https://lore.kernel.org/linux-arm-kernel/20200603151033.11512-1-will@kernel.org/
Thanks to Keno for a bunch of helpful feedback on that, which has led to
the following major changes for v2:
- Use pseudo-step traps for both entering a signal handler and exiting a
system call.
- Document our weird x7 behaviour with PTRACE_SYSCALL.
It has to be said that I'm a bit nervous about these changes. I played
around with GDB and things seemed ok, but I would really appreciate it
if Luis could run the GDB testsuite with these changes applied.
Cheers,
Will
Cc: <kernel-team@android.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Luis Machado <luis.machado@linaro.org>
Cc: Keno Fischer <keno@juliacomputing.com>
--->8
Will Deacon (4):
arm64: ptrace: Add a comment describing our syscall entry/exit trap
ABI
arm64: ptrace: Consistently use pseudo-singlestep exceptions
arm64: Override SPSR.SS when single-stepping is enabled
arm64: Use test_tsk_thread_flag() for checking TIF_SINGLESTEP
arch/arm64/include/asm/debug-monitors.h | 2 ++
arch/arm64/include/asm/thread_info.h | 1 +
arch/arm64/kernel/debug-monitors.c | 24 +++++++++----
arch/arm64/kernel/ptrace.c | 45 +++++++++++++++++++------
arch/arm64/kernel/signal.c | 11 ++----
arch/arm64/kernel/syscall.c | 2 +-
6 files changed, 59 insertions(+), 26 deletions(-)
--
2.27.0.212.ge8ba1cc988-goog
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next reply other threads:[~2020-07-02 21:28 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-02 21:26 Will Deacon [this message]
2020-07-02 21:26 ` [PATCH v2 1/4] arm64: ptrace: Add a comment describing our syscall entry/exit trap ABI Will Deacon
2020-07-02 21:26 ` [PATCH v2 2/4] arm64: ptrace: Consistently use pseudo-singlestep exceptions Will Deacon
2020-07-10 14:02 ` Sasha Levin
2020-07-02 21:26 ` [PATCH v2 3/4] arm64: Override SPSR.SS when single-stepping is enabled Will Deacon
2020-07-10 14:02 ` Sasha Levin
2020-07-02 21:26 ` [PATCH v2 4/4] arm64: Use test_tsk_thread_flag() for checking TIF_SINGLESTEP Will Deacon
2020-07-03 10:52 ` [PATCH v2 0/4] arm64: Fix single-step handling Luis Machado
2020-07-03 11:49 ` Will Deacon
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