linux-kernel - Re: [RFC 0/2] __vdso

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Date:	Mon, 16 Jun 2014 08:31:39 -0700
From:	Ian Lance Taylor <iant@...ang.org>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Andy Lutomirski <luto@...capital.net>,
	"H. Peter Anvin" <hpa@...or.com>, Rich Felker <dalias@...c.org>,
	Mikael Pettersson <mikpelinux@...il.com>,
	Russ Cox <rsc@...ang.org>,
	Linux API <linux-api@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	X86 ML <x86@...nel.org>
Subject: Re: [RFC 0/2] __vdso_findsym

On Mon, Jun 16, 2014 at 7:38 AM, Andi Kleen <andi@...stfloor.org> wrote:
>> I think this issue started when some of the Go developers questioned
>> why the kernel needed to provide a very complex interface--parsing an
>> ELF shared shared library--for very simple functionality--looking up
>> the address of a magic function.  This approach has required special
>> support not just in Go, but also in the dynamic linker and gdb, and
>> does not work well for statically linked binaries.  The support in gdb
>> is perhaps a good idea, but elsewhere it does not make sense.
>>
>> So why not provide a simple interface?
>
> What good would it do now that everyone already supports it?

Do statically linked binaries use the vDSO calls?

Ian
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