[PATCH v5 10/11] x86/vsyscall/64: Add ENDBR64 to vsyscall entry points

From: Yu-cheng Yu
Date: Thu Oct 11 2018 - 11:22:19 EST


From: "H.J. Lu" <hjl.tools@xxxxxxxxx>

Add ENDBR64 to vsyscall entry points.

Signed-off-by: H.J. Lu <hjl.tools@xxxxxxxxx>
---
arch/x86/entry/vsyscall/vsyscall_emu_64.S | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/arch/x86/entry/vsyscall/vsyscall_emu_64.S b/arch/x86/entry/vsyscall/vsyscall_emu_64.S
index c9596a9af159..08554445bef1 100644
--- a/arch/x86/entry/vsyscall/vsyscall_emu_64.S
+++ b/arch/x86/entry/vsyscall/vsyscall_emu_64.S
@@ -18,16 +18,25 @@ __PAGE_ALIGNED_DATA
.type __vsyscall_page, @object
__vsyscall_page:

+#ifdef CONFIG_X86_INTEL_BRANCH_TRACKING_USER
+ endbr64
+#endif
mov $__NR_gettimeofday, %rax
syscall
ret

.balign 1024, 0xcc
+#ifdef CONFIG_X86_INTEL_BRANCH_TRACKING_USER
+ endbr64
+#endif
mov $__NR_time, %rax
syscall
ret

.balign 1024, 0xcc
+#ifdef CONFIG_X86_INTEL_BRANCH_TRACKING_USER
+ endbr64
+#endif
mov $__NR_getcpu, %rax
syscall
ret
--
2.17.1