diff mbox series

[v7,10/14] x86/vdso/32: Add ENDBR32 to __kernel_vsyscall entry point

Message ID 20190606200926.4029-11-yu-cheng.yu@intel.com (mailing list archive)
State New, archived
Headers show
Series Control-flow Enforcement: Branch Tracking, PTRACE | expand

Commit Message

Yu-cheng Yu June 6, 2019, 8:09 p.m. UTC 
From: "H.J. Lu" <hjl.tools@gmail.com>

Add ENDBR32 to __kernel_vsyscall entry point.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
---
 arch/x86/entry/vdso/vdso32/system_call.S | 3 +++
 1 file changed, 3 insertions(+)

Comments

Andy Lutomirski June 6, 2019, 8:25 p.m. UTC | #1 
On Thu, Jun 6, 2019 at 1:17 PM Yu-cheng Yu <yu-cheng.yu@intel.com> wrote:
>
> From: "H.J. Lu" <hjl.tools@gmail.com>
>
> Add ENDBR32 to __kernel_vsyscall entry point.
>

Acked-by: Andy Lutomirski <luto@kernel.org>

However, you forgot your own Signed-off-by.

> Signed-off-by: H.J. Lu <hjl.tools@gmail.com>


--Andy
diff mbox series

Patch

diff --git a/arch/x86/entry/vdso/vdso32/system_call.S b/arch/x86/entry/vdso/vdso32/system_call.S
index 263d7433dea8..2fc8141fff4e 100644
--- a/arch/x86/entry/vdso/vdso32/system_call.S
+++ b/arch/x86/entry/vdso/vdso32/system_call.S
@@ -14,6 +14,9 @@ 
 	ALIGN
 __kernel_vsyscall:
 	CFI_STARTPROC
+#ifdef CONFIG_X86_INTEL_BRANCH_TRACKING_USER
+	endbr32
+#endif
 	/*
 	 * Reshuffle regs so that all of any of the entry instructions
 	 * will preserve enough state.