From: Vivek Goyal <vgoyal@redhat.com>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: mjg59@srcf.ucam.org, bhe@redhat.com, greg@kroah.com,
kexec@lists.infradead.org, linux-kernel@vger.kernel.org,
Shaun Ruffell <sruffell@digium.com>,
bp@alien8.de, ebiederm@xmission.com, akpm@linux-foundation.org,
dyoung@redhat.com, chaowang@redhat.com
Subject: Re: [PATCH 11/15] purgatory: Core purgatory functionality
Date: Mon, 11 Aug 2014 14:15:43 -0400 [thread overview]
Message-ID: <20140811181543.GD1863@redhat.com> (raw)
In-Reply-To: <53E906B0.5040105@zytor.com>
On Mon, Aug 11, 2014 at 11:08:48AM -0700, H. Peter Anvin wrote:
> On 08/11/2014 11:02 AM, Vivek Goyal wrote:
> >
> > Hi hpa,
> >
> > I took it because kexec-tools uses it and in one of the committs Eric
> > gave following reasoning.
> >
> > On x86_64 use -mcmodel=large so that the code is built without
> > any 32bit assumptions. -mcmodel=medium and -mcmodel=small
> > result int code that has 32bit relocations against variables
> > that can live anywhere in the address space
> >
> > We do want to load purgatory anywhere in the address space.
> >
> > But if there are other ways to achieve the same thing, I will do that
> > change.
> >
> > So when you say "small PIC", I need to use -mcmodel=small and -fPIC?
> >
>
> Actually -fPIE is probably better than -fPIC.
>
> -mcmodel=large is incompatible with all other code out there, which
> means that even though it is supposed to work it will be poorly tested
> at best. So even despite the gcc version issue, using the small PIC
> model would be better.
Ok, I will give it a try.
Thanks
Vivek
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
next prev parent reply other threads:[~2014-08-11 18:16 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-26 20:33 [PATCH 00/15][V4] kexec: A new system call to allow in kernel loading Vivek Goyal
2014-06-26 20:33 ` [PATCH 01/15] bin2c: Move bin2c in scripts/basic Vivek Goyal
2014-06-26 20:33 ` [PATCH 02/15] kernel: Build bin2c based on config option CONFIG_BUILD_BIN2C Vivek Goyal
2014-06-26 20:33 ` [PATCH 03/15] kexec: rename unusebale_pages to unusable_pages Vivek Goyal
2014-06-26 20:33 ` [PATCH 04/15] kexec: Move segment verification code in a separate function Vivek Goyal
2014-06-26 20:33 ` [PATCH 05/15] kexec: Use common function for kimage_normal_alloc() and kimage_crash_alloc() Vivek Goyal
2014-06-26 20:33 ` [PATCH 06/15] resource: Provide new functions to walk through resources Vivek Goyal
2014-06-26 20:33 ` [PATCH 07/15] kexec: Make kexec_segment user buffer pointer a union Vivek Goyal
2014-06-26 20:33 ` [PATCH 08/15] kexec: New syscall kexec_file_load() declaration Vivek Goyal
2014-06-26 20:43 ` Vivek Goyal
2014-06-26 21:03 ` Andy Lutomirski
2014-06-27 11:50 ` Vivek Goyal
2014-06-27 12:20 ` Michael Kerrisk (man-pages)
2014-06-26 20:33 ` [PATCH 09/15] kexec: Implementation of new syscall kexec_file_load Vivek Goyal
2014-06-26 20:58 ` Andrew Morton
2014-06-27 16:31 ` Vivek Goyal
2014-07-01 20:25 ` Vivek Goyal
2014-06-26 20:33 ` [PATCH 10/15] purgatory/sha256: Provide implementation of sha256 in purgaotory context Vivek Goyal
2014-06-26 20:33 ` [PATCH 11/15] purgatory: Core purgatory functionality Vivek Goyal
2014-08-11 17:40 ` Shaun Ruffell
2014-08-11 17:51 ` H. Peter Anvin
2014-08-11 18:02 ` Vivek Goyal
2014-08-11 18:08 ` H. Peter Anvin
2014-08-11 18:15 ` Vivek Goyal [this message]
2014-08-11 20:23 ` Vivek Goyal
2014-06-26 20:33 ` [PATCH 12/15] kexec: Load and Relocate purgatory at kernel load time Vivek Goyal
2014-06-26 20:33 ` [PATCH 13/15] kexec-bzImage64: Support for loading bzImage using 64bit entry Vivek Goyal
2014-06-26 20:33 ` [PATCH 14/15] kexec: Support for kexec on panic using new system call Vivek Goyal
2014-06-26 20:33 ` [PATCH 15/15] kexec: Support kexec/kdump on EFI systems Vivek Goyal
2014-07-01 19:46 ` Matt Fleming
2014-07-01 20:14 ` Andrew Morton
2014-07-01 20:21 ` Vivek Goyal
2014-07-01 21:23 ` Matt Fleming
2014-07-01 20:09 ` [PATCH 17/15] kexec-bzimage: Change EFI helper function names Vivek Goyal
2014-06-26 20:39 ` [PATCH 00/15][V4] kexec: A new system call to allow in kernel loading Vivek Goyal
2014-06-26 20:58 ` Andrew Morton
2014-06-26 21:21 ` Borislav Petkov
2014-06-27 11:33 ` Vivek Goyal
2014-06-27 16:34 ` [PATCH 16/15] kexec: Fix freeing up for image loader data loading Vivek Goyal
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20140811181543.GD1863@redhat.com \
--to=vgoyal@redhat.com \
--cc=akpm@linux-foundation.org \
--cc=bhe@redhat.com \
--cc=bp@alien8.de \
--cc=chaowang@redhat.com \
--cc=dyoung@redhat.com \
--cc=ebiederm@xmission.com \
--cc=greg@kroah.com \
--cc=hpa@zytor.com \
--cc=kexec@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mjg59@srcf.ucam.org \
--cc=sruffell@digium.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox