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_set_return_ip(regs, regs->link); 15 } 16 NOKPROBE_SYMBOL(override_function_with_return); 17