// SPDX-License-Identifier: GPL-2.0+ #include <linux/kernel.h> #include <linux/kprobes.h> #include <linux/module.h> #include <linux/kallsyms.h> #include <asm/sections.h> #include "decode-insn.h" #include "simulate-insn.h" /* Return: * INSN_REJECTED If instruction is one not allowed to kprobe, * INSN_GOOD_NO_SLOT If instruction is supported but doesn't use its slot. */ enum probe_insn __kprobes riscv_probe_decode_insn(probe_opcode_t *addr, struct arch_probe_insn *api) { probe_opcode_t insn = *addr; /* * Reject instructions list: */ RISCV_INSN_REJECTED(system, insn); RISCV_INSN_REJECTED(fence, insn); /* * Simulate instructions list: * TODO: the REJECTED ones below need to be implemented */ #ifdef CONFIG_RISCV_ISA_C RISCV_INSN_REJECTED(c_j, insn); RISCV_INSN_REJECTED(c_jr, insn); RISCV_INSN_REJECTED(c_jal, insn); RISCV_INSN_REJECTED(c_jalr, insn); RISCV_INSN_REJECTED(c_beqz, insn); RISCV_INSN_REJECTED(c_bnez, insn); RISCV_INSN_REJECTED(c_ebreak, insn); #endif RISCV_INSN_SET_SIMULATE(jal, insn); RISCV_INSN_SET_SIMULATE(jalr, insn); RISCV_INSN_SET_SIMULATE(auipc, insn); RISCV_INSN_SET_SIMULATE(branch, insn); return INSN_GOOD; }