linux-kernel - Re: vdso_install target broken post-3.15

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Message-ID: <53A10C21.8070101@zytor.com>
Date:	Tue, 17 Jun 2014 20:48:49 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Andy Lutomirski <luto@...capital.net>
CC:	Josh Boyer <jwboyer@...oraproject.org>,
	"Linux-Kernel@...r. Kernel. Org" <linux-kernel@...r.kernel.org>
Subject: Re: vdso_install target broken post-3.15

On 06/17/2014 08:45 PM, Andy Lutomirski wrote:
> On Tue, Jun 17, 2014 at 3:54 PM, Andy Lutomirski <luto@...capital.net> wrote:
>> Just a heads up: gdb can't debug the vdso on 3.16-rc1.  I filed a bug:
>>
>> https://sourceware.org/bugzilla/show_bug.cgi?id=17064
>>
>> We may need to extend the fake section header hack to all vdso
>> versions and stick the ELF notes in there.
> 
> I have a semi-working implementation of a workaround, bit it adds a
> fair amount of extra crud to the image, and it's pushing my
> configuration past a page boundary.  I suspect that, if we're willing
> to abuse the ELF format a bit more, I can get the overhead down,
> though.
> 
> Are we okay with regressing here until binutils gets fixed?
> 

Probably not... although I guess it depends just how bad it really is.

	-hpa


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