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Re: [Xen-devel] [PATCH v3 23/27] x86/modules: Adapt module loading for PIE support
- To: Thomas Garnier <thgarnie@xxxxxxxxxx>, Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>, "David S . Miller" <davem@xxxxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, "H . Peter Anvin" <hpa@xxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Josh Poimboeuf <jpoimboe@xxxxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, Philippe Ombredanne <pombredanne@xxxxxxxx>, Kate Stewart <kstewart@xxxxxxxxxxxxxxxxxxx>, Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>, Yonghong Song <yhs@xxxxxx>, Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>, Kees Cook <keescook@xxxxxxxxxxxx>, Tom Lendacky <thomas.lendacky@xxxxxxx>, "Kirill A . Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxx>, Dominik Brodowski <linux@xxxxxxxxxxxxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Borislav Petkov <bp@xxxxxxx>, "Rafael J . Wysocki" <rjw@xxxxxxxxxxxxx>, Len Brown <len.brown@xxxxxxxxx>, Pavel Machek <pavel@xxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Alok Kataria <akataria@xxxxxxxxxx>, Steven Rostedt <rostedt@xxxxxxxxxxx>, Jan Kiszka <jan.kiszka@xxxxxxxxxxx>, Tejun Heo <tj@xxxxxxxxxx>, Christoph Lameter <cl@xxxxxxxxx>, Dennis Zhou <dennisszhou@xxxxxxxxx>, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, Alexey Dobriyan <adobriyan@xxxxxxxxx>, Masami Hiramatsu <mhiramat@xxxxxxxxxx>, Cao jin <caoj.fnst@xxxxxxxxxxxxxx>, Francis Deslauriers <francis.deslauriers@xxxxxxxxxxxx>, "Paul E . McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>, Nicolas Pitre <nicolas.pitre@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, "Luis R . Rodriguez" <mcgrof@xxxxxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, Christopher Li <sparse@xxxxxxxxxxx>, Jason Baron <jbaron@xxxxxxxxxx>, Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>, Lukas Wunner <lukas@xxxxxxxxx>, Dou Liyang <douly.fnst@xxxxxxxxxxxxxx>, Sergey Senozhatsky <sergey.senozhatsky.work@xxxxxxxxx>, Petr Mladek <pmladek@xxxxxxxx>, Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Nicholas Piggin <npiggin@xxxxxxxxx>, "H . J . Lu" <hjl.tools@xxxxxxxxx>, Paolo Bonzini <pbonzini@xxxxxxxxxx>, Radim Krčmář <rkrcmar@xxxxxxxxxx>, Joerg Roedel <joro@xxxxxxxxxx>, David Woodhouse <dwmw@xxxxxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, Rik van Riel <riel@xxxxxxxxxx>, Jia Zhang <qianyue.zj@xxxxxxxxxxxxxxx>, Ricardo Neri <ricardo.neri-calderon@xxxxxxxxxxxxxxx>, Jonathan Corbet <corbet@xxxxxxx>, Jan Beulich <JBeulich@xxxxxxxx>, Matthias Kaehlcke <mka@xxxxxxxxxxxx>, Baoquan He <bhe@xxxxxxxxxx>, Jan H . Schönherr <jschoenh@xxxxxxxxx>, Daniel Micay <danielmicay@xxxxxxxxx>
- From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
- Date: Wed, 23 May 2018 14:26:51 -0700
- Cc: linux-arch@xxxxxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, linux-pm@xxxxxxxxxxxxxxx, x86@xxxxxxxxxx, linux-doc@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx, linux-sparse@xxxxxxxxxxxxxxx, linux-crypto@xxxxxxxxxxxxxxx, kernel-hardening@xxxxxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Wed, 23 May 2018 21:27:20 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
Hi,
(for several patches in this series:)
The commit message is confusing. See below.
On 05/23/2018 12:54 PM, Thomas Garnier wrote:
> Adapt module loading to support PIE relocations. Generate dynamic GOT if
> a symbol requires it but no entry exist in the kernel GOT.
exists
>
> Position Independent Executable (PIE) support will allow to extended the
will allow us to extend the
> KASLR randomization range below the -2G memory limit.
Does that say "below th negative 2G memory limit"?
I don't get it.
>
> Signed-off-by: Thomas Garnier <thgarnie@xxxxxxxxxx>
> ---
> arch/x86/Makefile | 4 +
> arch/x86/include/asm/module.h | 11 ++
> arch/x86/include/asm/sections.h | 4 +
> arch/x86/kernel/module.c | 181 +++++++++++++++++++++++++++++++-
> arch/x86/kernel/module.lds | 3 +
> 5 files changed, 198 insertions(+), 5 deletions(-)
> create mode 100644 arch/x86/kernel/module.lds
Thanks,
--
~Randy
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