arch/powerpc/lib/error-inject.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2
   3 #include <linux/error-injection.h>
   4 #include <linux/kprobes.h>
   5 #include <linux/uaccess.h>
   6
   7 void override_function_with_return(struct pt_regs *regs)
   8 {
   9         /*
  10          * Emulate 'blr'. 'regs' represents the state on entry of a predefined
  11          * function in the kernel/module, captured on a kprobe. We don't need
  12          * to worry about 32-bit userspace on a 64-bit kernel.
  13          */
  14         regs->nip = regs->link;
  15 }
  16 NOKPROBE_SYMBOL(override_function_with_return);