[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [PATCH 6/7] linux-user: add IBT support to x86 safe-sys
|
From: |
Paolo Bonzini |
|
Subject: |
Re: [Qemu-devel] [PATCH 6/7] linux-user: add IBT support to x86 safe-syscall.S |
|
Date: |
Thu, 14 Mar 2019 11:37:36 +0100 |
|
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 |
On 14/03/19 00:52, Richard Henderson wrote:
> On 3/13/19 5:40 AM, Paolo Bonzini wrote:
>> Because safe-syscall.S does not go through the C compiler, the
>> .note.gnu.property note has to be added manually. Safe syscalls do not
>> involve any indirect branch or stack unwinding, so they are trivially
>> safe for IBT or shadow stacks.
>>
>> Signed-off-by: Paolo Bonzini <address@hidden>
>> ---
>> linux-user/host/i386/safe-syscall.inc.S | 19 +++++++++++++++++++
>> linux-user/host/x86_64/safe-syscall.inc.S | 19 +++++++++++++++++++
>> 2 files changed, 38 insertions(+)
>
> I suppose it's not worth trying to share these 19 lines...
They aren't exactly shared, one is .p2align 2, the other is .p2align 3.
Paolo
> Reviewed-by: Richard Henderson <address@hidden>
>
>
> r~
>
- Re: [Qemu-devel] [PATCH 3/7] configure: add CET support, (continued)
[Qemu-devel] [PATCH 7/7] coroutine-x86: add CET shadow stack support, Paolo Bonzini, 2019/03/13
[Qemu-devel] [PATCH 4/7] tcg: add tcg_out_start, Paolo Bonzini, 2019/03/13
[Qemu-devel] [PATCH 6/7] linux-user: add IBT support to x86 safe-syscall.S, Paolo Bonzini, 2019/03/13
[Qemu-devel] [PATCH 5/7] tcg/i386: add support for IBT, Paolo Bonzini, 2019/03/13
Re: [Qemu-devel] [PATCH 5/7] tcg/i386: add support for IBT, Stefan Hajnoczi, 2019/03/15
Re: [Qemu-devel] [RFC PATCH for-4.1 0/7] CET support, no-reply, 2019/03/13