arch/x86/lib/error-inject.c

   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
   7 asmlinkage void just_return_func(void);
   8
   9 asm(
  10         ".text\n"
  11         ".type just_return_func, @function\n"
  12         ".globl just_return_func\n"
  13         "just_return_func:\n"
  14                 ASM_RET
  15         ".size just_return_func, .-just_return_func\n"
  16 );
  17
  18 void override_function_with_return(struct pt_regs *regs)
  19 {
  20         regs->ip = (unsigned long)&just_return_func;
  21 }
  22 NOKPROBE_SYMBOL(override_function_with_return);