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47 lines
1.2 KiB
47 lines
1.2 KiB
// 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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