From: Borislav Petkov <bp@suse.de>
To: Linus Torvalds <torvalds@linux-foundation.org>,
"Luck, Tony" <tony.luck@intel.com>
Cc: Ingo Molnar <mingo@kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <bp@alien8.de>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [GIT PULL] x86/asm changes for v5.6
Date: Tue, 28 Jan 2020 23:31:10 +0100 [thread overview]
Message-ID: <20200128223110.GB6787@zn.tnic> (raw)
In-Reply-To: <CAHk-=wipvtDUE=MZ=y7v1Xm7PE0pAaUwS26X1Zx5iL768yK=oQ@mail.gmail.com>
On Tue, Jan 28, 2020 at 01:04:19PM -0800, Linus Torvalds wrote:
> On Tue, Jan 28, 2020 at 12:41 PM Luck, Tony <tony.luck@intel.com> wrote:
> >
> > Is there still some easy way to get gdb to disassemble from /dev/kmem
> > to see what we ended up with after all the patching?
>
> Hmm. No, I think it's all gone.
>
> It _used_ to be easy to just do "objdump --disassemble /proc/kcore" as
> root, but I think we've broken that long ago.
Either booting with "debug-alternative" on baremetal or starting a guest
and stopping it with gdb and examining the patched memory is what I've
been using to hack on the alternatives in past years. Guest won't help
you a whole lot with FSRM but you could "force it", for example.
--
Regards/Gruss,
Boris.
SUSE Software Solutions Germany GmbH, GF: Felix Imendörffer, HRB 36809, AG Nürnberg
next prev parent reply other threads:[~2020-01-28 22:31 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-28 16:59 Ingo Molnar
2020-01-28 19:51 ` Linus Torvalds
2020-01-28 20:06 ` Linus Torvalds
2020-01-28 20:14 ` Ingo Molnar
2020-01-28 20:41 ` Luck, Tony
2020-01-28 21:04 ` Linus Torvalds
2020-01-28 22:31 ` Borislav Petkov [this message]
2020-01-29 18:00 ` Josh Poimboeuf
2020-01-29 13:26 ` Borislav Petkov
2020-01-29 17:07 ` Luck, Tony
2020-01-29 17:40 ` Linus Torvalds
2020-01-29 18:34 ` Borislav Petkov
2020-01-29 18:56 ` Linus Torvalds
2020-01-30 8:51 ` Borislav Petkov
2020-01-30 15:27 ` Linus Torvalds
2020-01-30 17:39 ` Borislav Petkov
2020-01-30 18:02 ` Linus Torvalds
2020-01-31 14:27 ` Borislav Petkov
2020-01-31 16:05 ` Josh Poimboeuf
2020-01-29 19:42 ` Luck, Tony
2020-01-30 5:47 ` Damian Tometzki
2020-01-30 7:55 ` Borislav Petkov
2020-01-30 11:10 ` Mike Rapoport
2020-01-30 11:53 ` Borislav Petkov
2020-01-30 11:59 ` Mike Rapoport
2020-01-30 12:06 ` Borislav Petkov
2020-01-30 16:45 ` Damian Tometzki
2020-01-30 17:39 ` Borislav Petkov
2020-01-28 21:15 ` pr-tracker-bot
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