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