xref: /openbmc/linux/arch/x86/lib/error-inject.c (revision 0d727e18)
1 // SPDX-License-Identifier: GPL-2.0
2 
3 #include <linux/linkage.h>
4 #include <linux/error-injection.h>
5 #include <linux/kprobes.h>
6 #include <linux/objtool.h>
7 
8 asmlinkage void just_return_func(void);
9 
10 asm(
11 	".text\n"
12 	".type just_return_func, @function\n"
13 	".globl just_return_func\n"
14 	ASM_FUNC_ALIGN
15 	"just_return_func:\n"
16 		ANNOTATE_NOENDBR
17 		ASM_RET
18 	".size just_return_func, .-just_return_func\n"
19 );
20 
21 void override_function_with_return(struct pt_regs *regs)
22 {
23 	regs->ip = (unsigned long)&just_return_func;
24 }
25 NOKPROBE_SYMBOL(override_function_with_return);
26