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authorHeiko Carstens <heiko.carstens@de.ibm.com>2013-09-13 12:14:10 (GMT)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2013-10-24 15:16:50 (GMT)
commit1ffa11abfe90320abe82bf5bb7eeca154e333058 (patch)
tree4bd80efa5b44e470471a78698ac736fab6867644 /arch/s390/include/asm/dis.h
parenta882b3b0676fa42ab29c492e56749ab00ca95c0d (diff)
downloadlinux-1ffa11abfe90320abe82bf5bb7eeca154e333058.tar.xz
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 <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/dis.h')
-rw-r--r--arch/s390/include/asm/dis.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/s390/include/asm/dis.h b/arch/s390/include/asm/dis.h
index 4d0dffc..04a83f5 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__ */