From: Borislav Petkov <bp@alien8.de>
To: Andy Lutomirski <luto@amacapital.net>
Cc: Brian Gerst <brgerst@gmail.com>,
Andy Lutomirski <luto@kernel.org>,
the arch/x86 maintainers <x86@kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Oleg Nesterov <oleg@redhat.com>,
Andrew Cooper <andrew.cooper3@citrix.com>
Subject: Re: [PATCH v2 07/10] x86/entry: Vastly simplify SYSENTER TF handling
Date: Sun, 6 Mar 2016 19:01:43 +0100 [thread overview]
Message-ID: <20160306180143.GB6902@pd.tnic> (raw)
In-Reply-To: <CALCETrV32APYgOe7a4jOSu8p2siu28XQ+mFqrzxudceFkQmk7w@mail.gmail.com>
On Sun, Mar 06, 2016 at 09:36:42AM -0800, Andy Lutomirski wrote:
> > ALTERNATIVE "movl TSS_sysenter_sp0(%esp), %esp", "addl $5*4, %esp",
> > X86_FEATURE_XENPV
>
> That might work.
Yap, and as we said on IRC, KALLSYMS can be off - even if it is "if
EXPERT" so we need to think of a better way to compute start address and
size of entry_SYSENTER_32 and the _compat one.
We probably could reuse some of the ELF parsing machinery of relocs.c or
so...
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
next prev parent reply other threads:[~2016-03-06 18:01 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-06 5:52 [PATCH 00/10] x86: Various SYSENTER/SYSEXIT/#DB fixes and cleanups Andy Lutomirski
2016-03-06 5:52 ` [PATCH v2 01/10] selftests/x86: In syscall_nt, test NT|TF as well Andy Lutomirski
2016-03-06 5:52 ` [PATCH v2 02/10] x86/entry/compat: In SYSENTER, sink AC clearing below the existing FLAGS test Andy Lutomirski
2016-03-06 5:52 ` [PATCH v2 03/10] x86/entry/32: Filter NT and speed up AC filtering in SYSENTER Andy Lutomirski
2016-03-06 5:52 ` [PATCH v2 04/10] x86/entry/32: Restore FLAGS on SYSEXIT Andy Lutomirski
2016-03-06 5:52 ` [PATCH v2 05/10] x86/traps: Clear TIF_BLOCKSTEP on all debug exceptions Andy Lutomirski
2016-03-06 5:52 ` [PATCH v2 06/10] x86/traps: Clear DR6 early in do_debug and improve the comment Andy Lutomirski
2016-03-06 5:52 ` [PATCH v2 07/10] x86/entry: Vastly simplify SYSENTER TF handling Andy Lutomirski
2016-03-06 16:55 ` Borislav Petkov
2016-03-06 17:30 ` Brian Gerst
2016-03-06 17:36 ` Andy Lutomirski
2016-03-06 18:01 ` Borislav Petkov [this message]
2016-03-06 18:20 ` Andrew Cooper
2016-03-07 17:17 ` Brian Gerst
2016-03-07 18:03 ` Andy Lutomirski
2016-03-07 18:41 ` Brian Gerst
2016-03-07 18:46 ` Andy Lutomirski
2016-03-06 5:52 ` [PATCH v2 08/10] x86/entry: Only allocate space for SYSENTER_stack if needed Andy Lutomirski
2016-03-06 5:52 ` [PATCH v2 09/10] x86/entry/32: Simplify and fix up the SYSENTER stack #DB/NMI fixup Andy Lutomirski
2016-03-08 6:36 ` Borislav Petkov
2016-03-06 5:52 ` [PATCH v2 10/10] x86/entry/32: Add and check a stack canary for the SYSENTER stack Andy Lutomirski
2016-03-08 6:40 ` Borislav Petkov
2016-03-09 21:22 ` Andy Lutomirski
2016-03-06 8:22 ` [PATCH 00/10] x86: Various SYSENTER/SYSEXIT/#DB fixes and cleanups Ingo Molnar
2016-03-06 16:16 ` Andy Lutomirski
2016-03-07 8:29 ` Ingo Molnar
2016-03-06 8:31 ` Ingo Molnar
2016-03-06 16:16 ` Andy Lutomirski
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