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@@ -1468,6 +1468,33 @@ static struct insn *find_insn(unsigned char *code)
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return NULL;
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}
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+/**
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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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+ *
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+ * Decode the instruction at @instruction and store the corresponding
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+ * mnemonic into @buf.
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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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+{
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+ struct insn *insn;
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+
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+ insn = find_insn(instruction);
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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, sizeof(buf), "%s",
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+ long_insn_name[(int) insn->name[1]]);
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+ else
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+ snprintf(buf, sizeof(buf), "%.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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+
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static int print_insn(char *buffer, unsigned char *code, unsigned long addr)
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{
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struct insn *insn;
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