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33e53ae1ce
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>
20 lines
456 B
C
20 lines
456 B
C
/* SPDX-License-Identifier: GPL-2.0+ */
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#ifndef __CSKY_KERNEL_KPROBES_DECODE_INSN_H
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#define __CSKY_KERNEL_KPROBES_DECODE_INSN_H
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#include <asm/sections.h>
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#include <asm/kprobes.h>
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enum probe_insn {
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INSN_REJECTED,
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INSN_GOOD_NO_SLOT,
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INSN_GOOD,
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};
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#define is_insn32(insn) ((insn & 0xc000) == 0xc000)
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enum probe_insn __kprobes
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csky_probe_decode_insn(probe_opcode_t *addr, struct arch_probe_insn *asi);
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#endif /* __CSKY_KERNEL_KPROBES_DECODE_INSN_H */
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