summaryrefslogtreecommitdiffstats
path: root/arch/x86/lib/error-inject.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/x86/lib/error-inject.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/x86/lib/error-inject.c')
-rw-r--r--arch/x86/lib/error-inject.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/x86/lib/error-inject.c b/arch/x86/lib/error-inject.c
new file mode 100644
index 000000000..1e3de0769
--- /dev/null
+++ b/arch/x86/lib/error-inject.c
@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/linkage.h>
+#include <linux/error-injection.h>
+#include <linux/kprobes.h>
+#include <linux/objtool.h>
+
+asmlinkage void just_return_func(void);
+
+asm(
+ ".text\n"
+ ".type just_return_func, @function\n"
+ ".globl just_return_func\n"
+ "just_return_func:\n"
+ ANNOTATE_NOENDBR
+ ASM_RET
+ ".size just_return_func, .-just_return_func\n"
+);
+
+void override_function_with_return(struct pt_regs *regs)
+{
+ regs->ip = (unsigned long)&just_return_func;
+}
+NOKPROBE_SYMBOL(override_function_with_return);