// SPDX-License-Identifier: GPL-2.0-only /* * Generic return hook for riscv. */ #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, regs->s0); } NOKPROBE_SYMBOL(arch_rethook_trampoline_callback); void arch_rethook_prepare(struct rethook_node *rhn, struct pt_regs *regs, bool mcount) { rhn->ret_addr = regs->ra; rhn->frame = regs->s0; /* replace return addr with trampoline */ regs->ra = (unsigned long)arch_rethook_trampoline; } NOKPROBE_SYMBOL(arch_rethook_prepare);