From 1ffa11abfe90320abe82bf5bb7eeca154e333058 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Fri, 13 Sep 2013 14:14:10 +0200 Subject: s390/kprobes: allow kprobes only on known instructions Since we have an in-kernel disassembler we can make sure that there won't be any kprobes set on random data. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/dis.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'arch/s390/include') diff --git a/arch/s390/include/asm/dis.h b/arch/s390/include/asm/dis.h index 4d0dffc68221..04a83f5773cd 100644 --- a/arch/s390/include/asm/dis.h +++ b/arch/s390/include/asm/dis.h @@ -42,5 +42,11 @@ static inline int insn_length(unsigned char code) void show_code(struct pt_regs *regs); void print_fn_code(unsigned char *code, unsigned long len); int insn_to_mnemonic(unsigned char *instruction, char *buf, unsigned int len); +struct s390_insn *find_insn(unsigned char *code); + +static inline int is_known_insn(unsigned char *code) +{ + return !!find_insn(code); +} #endif /* __ASM_S390_DIS_H__ */ -- cgit