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s390/dis: use explicit buf len
Pass buffer length in extra parameter. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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@ -161,7 +161,8 @@ extern unsigned long thread_saved_pc(struct task_struct *t);
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extern void show_code(struct pt_regs *regs);
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extern void print_fn_code(unsigned char *code, unsigned long len);
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extern int insn_to_mnemonic(unsigned char *instruction, char buf[8]);
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extern int insn_to_mnemonic(unsigned char *instruction, char *buf,
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unsigned int len);
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unsigned long get_wchan(struct task_struct *p);
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#define task_pt_regs(tsk) ((struct pt_regs *) \
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@ -1696,14 +1696,15 @@ static struct insn *find_insn(unsigned char *code)
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* insn_to_mnemonic - decode an s390 instruction
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* @instruction: instruction to decode
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* @buf: buffer to fill with mnemonic
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* @len: length of buffer
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*
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* Decode the instruction at @instruction and store the corresponding
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* mnemonic into @buf.
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* mnemonic into @buf of length @len.
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* @buf is left unchanged if the instruction could not be decoded.
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* Returns:
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* %0 on success, %-ENOENT if the instruction was not found.
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*/
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int insn_to_mnemonic(unsigned char *instruction, char buf[8])
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int insn_to_mnemonic(unsigned char *instruction, char *buf, unsigned int len)
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{
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struct insn *insn;
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@ -1711,10 +1712,10 @@ int insn_to_mnemonic(unsigned char *instruction, char buf[8])
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if (!insn)
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return -ENOENT;
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if (insn->name[0] == '\0')
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snprintf(buf, 8, "%s",
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snprintf(buf, len, "%s",
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long_insn_name[(int) insn->name[1]]);
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else
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snprintf(buf, 8, "%.5s", insn->name);
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snprintf(buf, len, "%.5s", insn->name);
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return 0;
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}
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EXPORT_SYMBOL_GPL(insn_to_mnemonic);
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@ -117,7 +117,7 @@ TRACE_EVENT(kvm_s390_intercept_instruction,
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__entry->instruction,
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insn_to_mnemonic((unsigned char *)
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&__entry->instruction,
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__entry->insn) ?
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__entry->insn, sizeof(__entry->insn)) ?
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"unknown" : __entry->insn)
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);
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