This is the mail archive of the
libc-alpha@sourceware.org
mailing list for the glibc project.
Re: RFC: Add --enable-static-pie to build static executables as PIE
- From: "H.J. Lu" <hjl dot tools at gmail dot com>
- To: Szabolcs Nagy <szabolcs dot nagy at arm dot com>
- Cc: Alan Modra <amodra at gmail dot com>, nd <nd at arm dot com>, Rich Felker <dalias at libc dot org>, GNU C Library <libc-alpha at sourceware dot org>
- Date: Tue, 18 Jul 2017 11:58:01 -0700
- Subject: Re: RFC: Add --enable-static-pie to build static executables as PIE
- Authentication-results: sourceware.org; auth=none
- References: <CAMe9rOpAVyDYwe5o3S+0T96Ryeug=qHwgbQguGL4kaqJOrKViw@mail.gmail.com> <20170717222937.GQ1627@brightrain.aerifal.cx> <CAMe9rOozp6T25FzpP41S+PaWmANa955=K8hZcFagmFfoaQKgSA@mail.gmail.com> <20170718042500.GI14520@bubble.grove.modra.org> <CAMe9rOq3h1mvrLUn7CQ9vJ=NmERhr=Hb1KHu7-zkA6aKKT7WHA@mail.gmail.com> <20170718134800.GK14520@bubble.grove.modra.org> <596E2779.4000109@arm.com>
On Tue, Jul 18, 2017 at 8:21 AM, Szabolcs Nagy <szabolcs.nagy@arm.com> wrote:
> On 18/07/17 14:48, Alan Modra wrote:
>> On Tue, Jul 18, 2017 at 05:30:48AM -0700, H.J. Lu wrote:
>>> On Mon, Jul 17, 2017 at 9:25 PM, Alan Modra <amodra@gmail.com> wrote:
>>> Linker needs to support --no-dynamic-linker.
>>
>> Is there really much to be gained from PIEs that don't use ld.so
>> versus those that do?
>>
>
> in glibc ld.so in principle only works with one particular
> version of glibc, you cannot move a static linked pie binary
> to another system if it has ld.so dependency.
>
Please checkout hl/pie/static branch at
https://sourceware.org/git/?p=glibc.git;a=shortlog;h=refs/heads/hl/pie/static
It works surprising well on x86-64. The changes are relative minor and there
are no regressions. The gcc driver only needs some minor changes to create
static PIE.
I am working on i386, mainly PIC vs SHARED.
--
H.J.