diff mbox series

[v8,10/14] x86/vsyscall/64: Add ENDBR64 to vsyscall entry points

Message ID 20190813205359.12196-11-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 Aug. 13, 2019, 8:53 p.m. UTC 
From: "H.J. Lu" <hjl.tools@gmail.com>

Add ENDBR64 to vsyscall entry points.

Acked-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
---
 arch/x86/entry/vsyscall/vsyscall_emu_64.S | 9 +++++++++
 1 file changed, 9 insertions(+)
diff mbox series

Patch

diff --git a/arch/x86/entry/vsyscall/vsyscall_emu_64.S b/arch/x86/entry/vsyscall/vsyscall_emu_64.S
index 2e203f3a25a7..040696333457 100644
--- a/arch/x86/entry/vsyscall/vsyscall_emu_64.S
+++ b/arch/x86/entry/vsyscall/vsyscall_emu_64.S
@@ -17,16 +17,25 @@  __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