mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2025-01-23 14:24:25 +08:00
d943705fba
kprobes currently rejects instruction c.beqz and c.bnez. Implement them. Signed-off-by: Nam Cao <namcaov@gmail.com> Reviewed-by: Charlie Jenkins <charlie@rivosinc.com> Link: https://lore.kernel.org/r/1d879dba4e4ee9a82e27625d6483b5c9cfed684f.1690704360.git.namcaov@gmail.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
// 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_jal, insn);
|
|
RISCV_INSN_REJECTED(c_ebreak, insn);
|
|
|
|
RISCV_INSN_SET_SIMULATE(c_j, insn);
|
|
RISCV_INSN_SET_SIMULATE(c_jr, insn);
|
|
RISCV_INSN_SET_SIMULATE(c_jalr, insn);
|
|
RISCV_INSN_SET_SIMULATE(c_beqz, insn);
|
|
RISCV_INSN_SET_SIMULATE(c_bnez, 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;
|
|
}
|