26 lines
554 B
C
26 lines
554 B
C
|
// 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"
|
||
|
|
ASM_FUNC_ALIGN
|
||
|
|
"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);
|