From 0aec21cfb51bc1856206f312d8c13bf1f368d78e Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Tue, 8 Mar 2022 16:30:34 +0100
Subject: [PATCH] x86/ibt,ftrace: Add ENDBR to samples/ftrace

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/20220308154318.523421433@infradead.org
---
 samples/ftrace/ftrace-direct-modify.c       |  5 +++++
 samples/ftrace/ftrace-direct-multi-modify.c | 10 +++++++---
 samples/ftrace/ftrace-direct-multi.c        |  5 ++++-
 samples/ftrace/ftrace-direct-too.c          |  3 +++
 samples/ftrace/ftrace-direct.c              |  3 +++
 5 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/samples/ftrace/ftrace-direct-modify.c b/samples/ftrace/ftrace-direct-modify.c
index 2c7c31893551d..39146fa83e20b 100644
--- a/samples/ftrace/ftrace-direct-modify.c
+++ b/samples/ftrace/ftrace-direct-modify.c
@@ -24,20 +24,25 @@ static unsigned long my_ip = (unsigned long)schedule;
 
 #ifdef CONFIG_X86_64
 
+#include <asm/ibt.h>
+
 asm (
 "	.pushsection    .text, \"ax\", @progbits\n"
 "	.type		my_tramp1, @function\n"
 "	.globl		my_tramp1\n"
 "   my_tramp1:"
+	ASM_ENDBR
 "	pushq %rbp\n"
 "	movq %rsp, %rbp\n"
 "	call my_direct_func1\n"
 "	leave\n"
 "	.size		my_tramp1, .-my_tramp1\n"
 	ASM_RET
+
 "	.type		my_tramp2, @function\n"
 "	.globl		my_tramp2\n"
 "   my_tramp2:"
+	ASM_ENDBR
 "	pushq %rbp\n"
 "	movq %rsp, %rbp\n"
 "	call my_direct_func2\n"
diff --git a/samples/ftrace/ftrace-direct-multi-modify.c b/samples/ftrace/ftrace-direct-multi-modify.c
index 6f43a39decd02..65aa94d96f4e3 100644
--- a/samples/ftrace/ftrace-direct-multi-modify.c
+++ b/samples/ftrace/ftrace-direct-multi-modify.c
@@ -22,11 +22,14 @@ extern void my_tramp2(void *);
 
 #ifdef CONFIG_X86_64
 
+#include <asm/ibt.h>
+
 asm (
 "	.pushsection    .text, \"ax\", @progbits\n"
 "	.type		my_tramp1, @function\n"
 "	.globl		my_tramp1\n"
 "   my_tramp1:"
+	ASM_ENDBR
 "	pushq %rbp\n"
 "	movq %rsp, %rbp\n"
 "	pushq %rdi\n"
@@ -34,12 +37,13 @@ asm (
 "	call my_direct_func1\n"
 "	popq %rdi\n"
 "	leave\n"
-"	ret\n"
+	ASM_RET
 "	.size		my_tramp1, .-my_tramp1\n"
+
 "	.type		my_tramp2, @function\n"
-"\n"
 "	.globl		my_tramp2\n"
 "   my_tramp2:"
+	ASM_ENDBR
 "	pushq %rbp\n"
 "	movq %rsp, %rbp\n"
 "	pushq %rdi\n"
@@ -47,7 +51,7 @@ asm (
 "	call my_direct_func2\n"
 "	popq %rdi\n"
 "	leave\n"
-"	ret\n"
+	ASM_RET
 "	.size		my_tramp2, .-my_tramp2\n"
 "	.popsection\n"
 );
diff --git a/samples/ftrace/ftrace-direct-multi.c b/samples/ftrace/ftrace-direct-multi.c
index 2fafc9afcbf0f..41ded7c615c7f 100644
--- a/samples/ftrace/ftrace-direct-multi.c
+++ b/samples/ftrace/ftrace-direct-multi.c
@@ -17,11 +17,14 @@ extern void my_tramp(void *);
 
 #ifdef CONFIG_X86_64
 
+#include <asm/ibt.h>
+
 asm (
 "	.pushsection    .text, \"ax\", @progbits\n"
 "	.type		my_tramp, @function\n"
 "	.globl		my_tramp\n"
 "   my_tramp:"
+	ASM_ENDBR
 "	pushq %rbp\n"
 "	movq %rsp, %rbp\n"
 "	pushq %rdi\n"
@@ -29,7 +32,7 @@ asm (
 "	call my_direct_func\n"
 "	popq %rdi\n"
 "	leave\n"
-"	ret\n"
+	ASM_RET
 "	.size		my_tramp, .-my_tramp\n"
 "	.popsection\n"
 );
diff --git a/samples/ftrace/ftrace-direct-too.c b/samples/ftrace/ftrace-direct-too.c
index c93fb0e951738..6690468c5cc2d 100644
--- a/samples/ftrace/ftrace-direct-too.c
+++ b/samples/ftrace/ftrace-direct-too.c
@@ -19,11 +19,14 @@ extern void my_tramp(void *);
 
 #ifdef CONFIG_X86_64
 
+#include <asm/ibt.h>
+
 asm (
 "	.pushsection    .text, \"ax\", @progbits\n"
 "	.type		my_tramp, @function\n"
 "	.globl		my_tramp\n"
 "   my_tramp:"
+	ASM_ENDBR
 "	pushq %rbp\n"
 "	movq %rsp, %rbp\n"
 "	pushq %rdi\n"
diff --git a/samples/ftrace/ftrace-direct.c b/samples/ftrace/ftrace-direct.c
index 8b551e503a48e..e8f1e440b9b8a 100644
--- a/samples/ftrace/ftrace-direct.c
+++ b/samples/ftrace/ftrace-direct.c
@@ -16,11 +16,14 @@ extern void my_tramp(void *);
 
 #ifdef CONFIG_X86_64
 
+#include <asm/ibt.h>
+
 asm (
 "	.pushsection    .text, \"ax\", @progbits\n"
 "	.type		my_tramp, @function\n"
 "	.globl		my_tramp\n"
 "   my_tramp:"
+	ASM_ENDBR
 "	pushq %rbp\n"
 "	movq %rsp, %rbp\n"
 "	pushq %rdi\n"
-- 
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