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linux/arch/csky/kernel/probes/decode-insn.h
Guo Ren 33e53ae1ce csky: Add kprobes supported
This patch enable kprobes, kretprobes, ftrace interface. It utilized
software breakpoint and single step debug exceptions, instructions
simulation on csky.

We use USR_BKPT replace origin instruction, and the kprobe handler
prepares an excutable memory slot for out-of-line execution with a
copy of the original instruction being probed. Most of instructions
could be executed by single-step, but some instructions need origin
pc value to execute and we need software simulate these instructions.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
2020-04-03 11:14:17 +08:00

21 lines
456 B
C

/* SPDX-License-Identifier: GPL-2.0+ */
#ifndef __CSKY_KERNEL_KPROBES_DECODE_INSN_H
#define __CSKY_KERNEL_KPROBES_DECODE_INSN_H
#include <asm/sections.h>
#include <asm/kprobes.h>
enum probe_insn {
INSN_REJECTED,
INSN_GOOD_NO_SLOT,
INSN_GOOD,
};
#define is_insn32(insn) ((insn & 0xc000) == 0xc000)
enum probe_insn __kprobes
csky_probe_decode_insn(probe_opcode_t *addr, struct arch_probe_insn *asi);
#endif /* __CSKY_KERNEL_KPROBES_DECODE_INSN_H */