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Re: [Qemu-devel] [PATCH 6/7] linux-user: add IBT support to x86 safe-sys
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From: |
Richard Henderson |
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Subject: |
Re: [Qemu-devel] [PATCH 6/7] linux-user: add IBT support to x86 safe-syscall.S |
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Date: |
Wed, 13 Mar 2019 16:52:42 -0700 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 |
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...
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
- Re: [Qemu-devel] [PATCH 6/7] linux-user: add IBT support to x86 safe-syscall.S,
Richard Henderson <=
[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