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From: Ingo Molnar <mingo@kernel.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>,
	Richard Weinberger <richard@nod.at>,
	"H. Peter Anvin" <hpa@linux.intel.com>,
	Kees Cook <keescook@chromium.org>, Cong Ding <dinggnu@gmail.com>,
	Ingo Molnar <mingo@elte.hu>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Mathias Krause <minipli@googlemail.com>,
	Michael Davidson <md@google.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Subject: Re: [GIT PULL] x86/kaslr for v3.14
Date: Tue, 28 Jan 2014 18:05:07 +0100	[thread overview]
Message-ID: <20140128170507.GA16279@gmail.com> (raw)
In-Reply-To: <CA+55aFzRJNEt-tOGgj-6OPB0cMW9ReM6y6kzCyR5bfts1de-Jg@mail.gmail.com>


* Linus Torvalds <torvalds@linux-foundation.org> wrote:

> On Tue, Jan 28, 2014 at 8:30 AM, H. Peter Anvin <hpa@zytor.com> wrote:
> >
> > I don't think there is any way to not break anything... we're
> > introducing a new kind of object ("normalized kernel pointer") here.
> 
> I suspect we could just drop the addresses entirely if we have a 
> symbolic version. It's not like the hex addresses are all that 
> interesting, and in commit messages I actually end up editing them 
> out just because they are worthless noise.

Well, I often use the hex numbers to look them up and disassemble them 
in a vmlinux via gdb and 'list *0x1234123412341234' - where the 
vmlinux has no debuginfo. (Debuginfo takes longer to build so I 
generally build without it.)

I'm quite sure other kernel developers do that as well.

> So we could just do "schedule+0x45/0x368" without the actual hex 
> address in brackets..

AFAICS this won't work in a symbol-less vmlinux. Is there some trick 
to do it with gdb?

Thanks,

	Ingo

  reply	other threads:[~2014-01-28 17:05 UTC|newest]

Thread overview: 70+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-01-20 16:47 [GIT PULL] x86/kaslr for v3.14 H. Peter Anvin
2014-01-20 22:54 ` Linus Torvalds
2014-01-20 23:00   ` H. Peter Anvin
2014-01-20 23:12   ` Linus Torvalds
2014-01-20 23:13     ` H. Peter Anvin
2014-01-21  9:00       ` Peter Zijlstra
2014-01-21 14:20         ` H. Peter Anvin
2014-01-21 14:39           ` Ingo Molnar
2014-01-21 14:51             ` H. Peter Anvin
2014-01-21 14:56               ` Ingo Molnar
2014-01-21 18:37           ` Kees Cook
2014-01-21 10:27     ` Ingo Molnar
2014-01-21 13:55       ` H. Peter Anvin
2014-01-21 14:03         ` Ingo Molnar
2014-01-21 14:05           ` H. Peter Anvin
2014-01-21 14:14             ` Ingo Molnar
2014-01-21 14:17               ` H. Peter Anvin
2014-01-21  5:18   ` Kees Cook
2014-01-23  9:39   ` Pavel Machek
2014-01-26 10:16 ` Richard Weinberger
2014-01-27  5:33   ` H. Peter Anvin
2014-01-27  6:49     ` Richard Weinberger
2014-01-27  6:51       ` H. Peter Anvin
2014-01-27  7:38         ` Ingo Molnar
2014-01-27  7:43           ` Ingo Molnar
2014-01-27  7:59           ` Richard Weinberger
2014-01-30 22:07         ` Vivek Goyal
2014-01-31 16:57           ` Kees Cook
2014-02-07 14:49             ` Vivek Goyal
2014-02-07 16:04               ` H. Peter Anvin
2014-02-07 16:24                 ` Vivek Goyal
2014-02-07 23:16                   ` Dave Young
2014-02-07 23:20                     ` H. Peter Anvin
2014-02-07 23:28                       ` Dave Young
2014-02-07 19:07               ` H. Peter Anvin
2014-02-07 19:44                 ` Kees Cook
2014-01-27  6:52       ` H. Peter Anvin
2014-01-27  7:34         ` Richard Weinberger
2014-01-27 17:05       ` Kees Cook
2014-01-27 17:20         ` Richard Weinberger
2014-01-27 17:24           ` Kees Cook
2014-01-28  6:28             ` Ingo Molnar
2014-01-28  8:25               ` Richard Weinberger
2014-01-28 15:55                 ` H. Peter Anvin
2014-01-28 16:25                   ` Richard Weinberger
2014-01-28 16:30                     ` H. Peter Anvin
2014-01-28 16:51                       ` Linus Torvalds
2014-01-28 17:05                         ` Ingo Molnar [this message]
2014-01-28 17:12                           ` Linus Torvalds
2014-01-28 17:24                             ` Richard Weinberger
2014-01-28 17:35                               ` Linus Torvalds
2014-01-28 17:52                                 ` Richard Weinberger
2014-01-28 17:56                                   ` Linus Torvalds
2014-01-28 18:54                                     ` Richard Weinberger
2014-01-28 19:48                             ` Ingo Molnar
2014-01-28 20:07                               ` Linus Torvalds
2014-01-28 20:15                                 ` Borislav Petkov
2014-01-28 20:25                                   ` Linus Torvalds
2014-01-28 20:28                                     ` Richard Weinberger
2014-01-28 20:38                                       ` H. Peter Anvin
2014-01-29  8:25                                         ` Ingo Molnar
2014-01-29 10:40                                           ` Borislav Petkov
2014-01-28 20:49                                     ` Borislav Petkov
2014-01-28 23:37                                       ` Borislav Petkov
2014-01-28 21:08                                     ` Dave Jones
2014-01-29  6:36                                       ` Mike Galbraith
2014-01-29  8:11                                 ` Ingo Molnar
2014-01-29  8:27                                   ` Mathias Krause
2014-01-30  9:23                                     ` Ingo Molnar
2014-01-30 18:15                                       ` Linus Torvalds

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