linux-kernel - Re: [patch V3 07/13] x86/ptrace: Provide pt

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Message-ID: <202007161357.70EF223F@keescook>
Date:   Thu, 16 Jul 2020 13:57:54 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
        linux-arch@...r.kernel.org, Will Deacon <will@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Mark Rutland <mark.rutland@....com>,
        Keno Fischer <keno@...iacomputing.com>,
        Paolo Bonzini <pbonzini@...hat.com>, kvm@...r.kernel.org
Subject: Re: [patch V3 07/13] x86/ptrace: Provide pt_regs helpers for
 entry/exit

On Thu, Jul 16, 2020 at 08:22:15PM +0200, Thomas Gleixner wrote:
> As a preparatory step for moving the syscall and interrupt entry/exit
> handling into generic code, provide pt_regs helpers which allow to:
> 
>   - Retrieve the syscall number from pt_regs
>   - Retrieve the syscall return value from pt_regs
>   - Retrieve the interrupt state from pt_regs to check whether interrupts
>     are reenabled by return from interrupt/exception.
> 
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>

Reviewed-by: Kees Cook <keescook@...omium.org>

-- 
Kees Cook