linux-kernel - Re: [RFC PATCH 04/10] objtool: add undwarf debuginfo generation

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Date:   Thu, 22 Jun 2017 07:49:41 -0500
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Jiri Slaby <jslaby@...e.cz>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        live-patching@...r.kernel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andy Lutomirski <luto@...nel.org>,
        Ingo Molnar <mingo@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [RFC PATCH 04/10] objtool: add undwarf debuginfo generation

On Thu, Jun 22, 2017 at 09:47:46AM +0200, Jiri Slaby wrote:
> On 06/14/2017, 03:27 PM, Josh Poimboeuf wrote:
> > I agree with all your comments, will fix them all.  Thanks for the
> > review.
> 
> This is not the correct way:
> ++      if (flags & O_WRONLY)
> ++              cmd = ELF_C_WRITE;
> ++      else if (flags & O_RDWR)
> ++              cmd = ELF_C_RDWR;
> ++      else
> ++              cmd = ELF_C_READ_MMAP;
> 
> For this particular codeflow, it works, but it should be:
> (flags & O_ACCMODE) == O_WRONLY
>                     == O_RDWR

Ok, thanks.  I see you started reviewing v2 early ;-)  It's almost ready
to post, will send the patches next week.

-- 
Josh