linux-kernel - Re: [GIT PULL] x86/kaslr for v3.14

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CA+55aFyYoi_KW5h=RxvjXHe89ZgCifAiS=5DqRnvS=K=Rbitsg@mail.gmail.com>
Date:	Tue, 28 Jan 2014 09:35:38 -0800
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Richard Weinberger <richard@....at>
Cc:	Ingo Molnar <mingo@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
	"H. Peter Anvin" <hpa@...ux.intel.com>,
	Kees Cook <keescook@...omium.org>,
	Cong Ding <dinggnu@...il.com>, Ingo Molnar <mingo@...e.hu>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Mathias Krause <minipli@...glemail.com>,
	Michael Davidson <md@...gle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
Subject: Re: [GIT PULL] x86/kaslr for v3.14

On Tue, Jan 28, 2014 at 9:24 AM, Richard Weinberger <richard@....at> wrote:
>
> Hmm, my gdb does not like that notion.
>
> (gdb) list schedule+0x45
> Function "schedule+0x45" not defined.

I don't have a debug build, so maybe it's something specific to gdb
actually seeing type information and then being confused..

Can you do "x/10i schedule+0x45" because that definitely works for me.
But I literally detest DBUG_INFO builds, because it's useless crap.
99% of everything I debug is from people reporting problems on their
kernels, so it's not like my local debug info would match that anyway.

Anyway, if it's a type information thing due to DEBUG_INFO that
confuses gdb and makes it think that the "+0x45" part doesn't make
sense, you may need to add a cast to get gdb to ignore the type
information. IOW, does

  list (void *)schedule + 0x45

work for you?

I happen to have gdb-7.6.50 here that I tested with, but I've used
"symbol+offset" forever afaik, so it's definitely not something new.

              Linus
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/