From: "Björn Töpel" <bjorn@kernel.org>
To: Chen Guokai <chenguokai17@mails.ucas.ac.cn>,
paul.walmsley@sifive.com, palmer@dabbelt.com,
aou@eecs.berkeley.edu, rostedt@goodmis.org, mingo@redhat.com,
sfr@canb.auug.org.au
Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
liaochang1@huawei.com
Subject: Re: [PATCH v6 12/13] riscv/kprobe: Move exception related symbols to .kprobe_blacklist
Date: Wed, 01 Feb 2023 14:30:45 +0100 [thread overview]
Message-ID: <87tu05tsvu.fsf@all.your.base.are.belong.to.us> (raw)
In-Reply-To: <20230127130541.1250865-13-chenguokai17@mails.ucas.ac.cn>
Chen Guokai <chenguokai17@mails.ucas.ac.cn> writes:
> From: Liao Chang <liaochang1@huawei.com>
>
> Due to the generic exception entry and exit code is part of the critical
> path for kprobe breakpoint and uprobe syscall entry, set a kprobe on the
> assembly symbols in entry.S result in kernel stack overflow crash, hence
> it has to explicitly blacklist it, requiring a new _ASM_NOKPROBE() asm
> helper.
>
> Signed-off-by: Liao Chang <liaochang1@huawei.com>
Reviewed-by: Björn Töpel <bjorn@kernel.org>
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WARNING: multiple messages have this Message-ID (diff)
From: "Björn Töpel" <bjorn@kernel.org>
To: Chen Guokai <chenguokai17@mails.ucas.ac.cn>,
paul.walmsley@sifive.com, palmer@dabbelt.com,
aou@eecs.berkeley.edu, rostedt@goodmis.org, mingo@redhat.com,
sfr@canb.auug.org.au
Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
liaochang1@huawei.com
Subject: Re: [PATCH v6 12/13] riscv/kprobe: Move exception related symbols to .kprobe_blacklist
Date: Wed, 01 Feb 2023 14:30:45 +0100 [thread overview]
Message-ID: <87tu05tsvu.fsf@all.your.base.are.belong.to.us> (raw)
In-Reply-To: <20230127130541.1250865-13-chenguokai17@mails.ucas.ac.cn>
Chen Guokai <chenguokai17@mails.ucas.ac.cn> writes:
> From: Liao Chang <liaochang1@huawei.com>
>
> Due to the generic exception entry and exit code is part of the critical
> path for kprobe breakpoint and uprobe syscall entry, set a kprobe on the
> assembly symbols in entry.S result in kernel stack overflow crash, hence
> it has to explicitly blacklist it, requiring a new _ASM_NOKPROBE() asm
> helper.
>
> Signed-off-by: Liao Chang <liaochang1@huawei.com>
Reviewed-by: Björn Töpel <bjorn@kernel.org>
next prev parent reply other threads:[~2023-02-01 13:31 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-27 13:05 [PATCH v6 00/13] Add OPTPROBES feature on RISCV Chen Guokai
2023-01-27 13:05 ` Chen Guokai
2023-01-27 13:05 ` [PATCH v6 01/13] riscv/kprobe: Prepare the skeleton to implement RISCV OPTPROBES Chen Guokai
2023-01-27 13:05 ` Chen Guokai
2023-01-27 13:05 ` [PATCH v6 02/13] riscv/kprobe: Allocate detour buffer from module region Chen Guokai
2023-01-27 13:05 ` Chen Guokai
2023-01-27 13:05 ` [PATCH v6 03/13] riscv/kprobe: Add skeleton for preparing optimized kprobe Chen Guokai
2023-01-27 13:05 ` Chen Guokai
2023-01-27 13:05 ` [PATCH v6 04/13] riscv/kprobe: Add common RVI and RVC instruction decoder code Chen Guokai
2023-01-27 13:05 ` Chen Guokai
2023-02-01 13:29 ` Björn Töpel
2023-02-01 13:29 ` Björn Töpel
2023-02-02 10:16 ` Conor Dooley
2023-02-02 10:16 ` Conor Dooley
2023-01-27 13:05 ` [PATCH v6 05/13] riscv/kprobe: Introduce free register(s) searching algorithm Chen Guokai
2023-01-27 13:05 ` Chen Guokai
2023-01-27 13:05 ` [PATCH v6 06/13] riscv/kprobe: Add code to check if kprobe can be optimized Chen Guokai
2023-01-27 13:05 ` Chen Guokai
2023-02-01 13:30 ` Björn Töpel
2023-02-01 13:30 ` Björn Töpel
2023-01-27 13:05 ` [PATCH v6 07/13] riscv/kprobe: Prepare detour buffer for optimized kprobe Chen Guokai
2023-01-27 13:05 ` Chen Guokai
2023-02-01 13:30 ` Björn Töpel
2023-02-01 13:30 ` Björn Töpel
2023-01-27 13:05 ` [PATCH v6 08/13] riscv/kprobe: Patch AUIPC/JALR pair to optimize kprobe Chen Guokai
2023-01-27 13:05 ` Chen Guokai
2023-02-01 13:31 ` Björn Töpel
2023-02-01 13:31 ` Björn Töpel
2023-01-27 13:05 ` [PATCH v6 09/13] riscv/kprobe: Search free registers from unused caller-saved ones Chen Guokai
2023-01-27 13:05 ` Chen Guokai
2023-02-01 13:31 ` Björn Töpel
2023-02-01 13:31 ` Björn Töpel
2023-02-02 9:08 ` Conor Dooley
2023-02-02 9:08 ` Conor Dooley
2023-01-27 13:05 ` [PATCH v6 10/13] riscv/kprobe: Add instruction boundary check for RVI/RVC hybrid kernel Chen Guokai
2023-01-27 13:05 ` Chen Guokai
2023-01-27 13:05 ` [PATCH v6 11/13] riscv/kprobe: Fix instruction simulation of JALR Chen Guokai
2023-01-27 13:05 ` Chen Guokai
2023-01-31 12:51 ` Björn Töpel
2023-01-31 12:51 ` Björn Töpel
2023-01-27 13:05 ` [PATCH v6 12/13] riscv/kprobe: Move exception related symbols to .kprobe_blacklist Chen Guokai
2023-01-27 13:05 ` Chen Guokai
2023-02-01 13:30 ` Björn Töpel [this message]
2023-02-01 13:30 ` Björn Töpel
2023-01-27 13:05 ` [PATCH v6 13/13] selftest/kprobes: Add testcase for kprobe SYM[+offs] Chen Guokai
2023-01-27 13:05 ` Chen Guokai
2023-01-30 12:31 ` [PATCH v6 00/13] Add OPTPROBES feature on RISCV Björn Töpel
2023-01-30 12:31 ` Björn Töpel
2023-01-30 14:38 ` Xim
2023-01-30 14:38 ` Xim
2023-04-26 18:01 ` Palmer Dabbelt
2023-04-26 18:01 ` Palmer Dabbelt
2023-02-01 13:29 ` Björn Töpel
2023-02-01 13:29 ` Björn Töpel
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