// SPDX-License-Identifier: GPL-2.0 /* * Generic return hook for LoongArch. */ #include <linux/kprobes.h> #include <linux/rethook.h> #include "rethook.h" /* This is called from arch_rethook_trampoline() */ unsigned long __used arch_rethook_trampoline_callback(struct pt_regs *regs) { return rethook_trampoline_handler(regs, 0); } NOKPROBE_SYMBOL(arch_rethook_trampoline_callback); void arch_rethook_prepare(struct rethook_node *rhn, struct pt_regs *regs, bool mcount) { rhn->frame = 0; rhn->ret_addr = regs->regs[1]; /* replace return addr with trampoline */ regs->regs[1] = (unsigned long)arch_rethook_trampoline; } NOKPROBE_SYMBOL(arch_rethook_prepare); /* ASM function that handles the rethook must not be probed itself */ NOKPROBE_SYMBOL(arch_rethook_trampoline);