[RFC PATCH v6 09/11] x86/vsyscall/32: Add ENDBR32 to vsyscall entry point

From
Yu-cheng Yu <hidden>
Date
2018-11-19 21:55:28
Also in
linux-arch, linux-doc, linux-mm, lkml
Reply to
Yu-cheng Yu, 2018-11-19
From: "H.J. Lu" <redacted>

Add ENDBR32 to vsyscall entry point.

Signed-off-by: H.J. Lu <redacted>
---
 arch/x86/entry/vdso/vdso32/system_call.S | 3 +++
 1 file changed, 3 insertions(+)
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.
-- 
2.17.1
Thread (17 messages) 17 messages, 2 authors, last reply 2018-11-19
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