linux-kernel - Re: [PATCH -tip v2] x86/kprobes: Do not decode opcode in resume

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Message-ID: <20201231160923.GB4504@zn.tnic>
Date:   Thu, 31 Dec 2020 17:09:23 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        linux-kernel@...r.kernel.org,
        "Naveen N . Rao" <naveen.n.rao@...ux.ibm.com>,
        Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>,
        David Miller <davem@...emloft.net>, x86@...nel.org
Subject: Re: [PATCH -tip v2] x86/kprobes: Do not decode opcode in
 resume_execution()

On Fri, Dec 18, 2020 at 11:12:05PM +0900, Masami Hiramatsu wrote:
> @@ -467,8 +489,8 @@ static int arch_copy_kprobe(struct kprobe *p)
>  	 */
>  	len = prepare_boost(buf, p, &insn);
>  
> -	/* Check whether the instruction modifies Interrupt Flag or not */
> -	p->ainsn.if_modifier = is_IF_modifier(buf);
> +	/* Analyze the opcode and set resume flags */
> +	set_resume_flags(p, &insn);

So this function wants to be called something like analyze_insn() or so
then? set_resume_flags() is kinda misleading as a name.

Thx.

-- 
Regards/Gruss,
    Boris.

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