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diff --git a/gdbsupport/ax.def b/gdbsupport/ax.def
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+/* Definition of agent opcode values.   -*- c -*-
+   Copyright (C) 1998-2020 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* The actual values of the various bytecode operations.
+
+   Other independent implementations of the agent bytecode engine will
+   rely on the exact values of these enums, and may not be recompiled
+   when we change this table.  The numeric values should remain fixed
+   whenever possible.  Thus, we assign them values explicitly here (to
+   allow gaps to form safely), and the disassembly table in
+   agentexpr.h behaves like an opcode map.  If you want to see them
+   grouped logically, see doc/agentexpr.texi.
+
+   Each line is of the form:
+   
+   DEFOP (name, size, data_size, consumed, produced, opcode)
+   
+   NAME is the name of the operation.
+   SIZE is the number of argument bytes that the operation takes from
+   the bytecode stream.
+   DATA_SIZE is the size of data operated on, in bits, for operations
+   that care (ref and const).  It is zero otherwise.
+   CONSUMED is the number of stack elements consumed.
+   PRODUCED is the number of stack elements produced.
+   OPCODE is the operation's encoding.  */
+
+DEFOP (float, 0, 0, 0, 0, 0x01)
+DEFOP (add, 0, 0, 2, 1, 0x02)
+DEFOP (sub, 0, 0, 2, 1, 0x03)
+DEFOP (mul, 0, 0, 2, 1, 0x04)
+DEFOP (div_signed, 0, 0, 2, 1, 0x05)
+DEFOP (div_unsigned, 0, 0, 2, 1, 0x06)
+DEFOP (rem_signed, 0, 0, 2, 1, 0x07)
+DEFOP (rem_unsigned, 0, 0, 2, 1, 0x08)
+DEFOP (lsh, 0, 0, 2, 1, 0x09)
+DEFOP (rsh_signed, 0, 0, 2, 1, 0x0a)
+DEFOP (rsh_unsigned, 0, 0, 2, 1, 0x0b)
+DEFOP (trace, 0, 0, 2, 0, 0x0c)
+DEFOP (trace_quick, 1, 0, 1, 1, 0x0d)
+DEFOP (log_not, 0, 0, 1, 1, 0x0e)
+DEFOP (bit_and, 0, 0, 2, 1, 0x0f)
+DEFOP (bit_or, 0, 0, 2, 1, 0x10)
+DEFOP (bit_xor, 0, 0, 2, 1, 0x11)
+DEFOP (bit_not, 0, 0, 1, 1, 0x12)
+DEFOP (equal, 0, 0, 2, 1, 0x13)
+DEFOP (less_signed, 0, 0, 2, 1, 0x14)
+DEFOP (less_unsigned, 0, 0, 2, 1, 0x15)
+DEFOP (ext, 1, 0, 1, 1, 0x16)
+DEFOP (ref8, 0, 8, 1, 1, 0x17)
+DEFOP (ref16, 0, 16, 1, 1, 0x18)
+DEFOP (ref32, 0, 32, 1, 1, 0x19)
+DEFOP (ref64, 0, 64, 1, 1, 0x1a)
+DEFOP (ref_float, 0, 0, 1, 1, 0x1b)
+DEFOP (ref_double, 0, 0, 1, 1, 0x1c)
+DEFOP (ref_long_double, 0, 0, 1, 1, 0x1d)
+DEFOP (l_to_d, 0, 0, 1, 1, 0x1e)
+DEFOP (d_to_l, 0, 0, 1, 1, 0x1f)
+DEFOP (if_goto, 2, 0, 1, 0, 0x20)
+DEFOP (goto, 2, 0, 0, 0, 0x21)
+DEFOP (const8, 1, 8, 0, 1, 0x22)
+DEFOP (const16, 2, 16, 0, 1, 0x23)
+DEFOP (const32, 4, 32, 0, 1, 0x24)
+DEFOP (const64, 8, 64, 0, 1, 0x25)
+DEFOP (reg, 2, 0, 0, 1, 0x26)
+DEFOP (end, 0, 0, 0, 0, 0x27)
+DEFOP (dup, 0, 0, 1, 2, 0x28)
+DEFOP (pop, 0, 0, 1, 0, 0x29)
+DEFOP (zero_ext, 1, 0, 1, 1, 0x2a)
+DEFOP (swap, 0, 0, 2, 2, 0x2b)
+DEFOP (getv, 2, 0, 0, 1, 0x2c)
+DEFOP (setv, 2, 0, 1, 1, 0x2d)
+DEFOP (tracev, 2, 0, 0, 1, 0x2e)
+DEFOP (tracenz, 0, 0, 2, 0, 0x2f)
+DEFOP (trace16, 2, 0, 1, 1, 0x30)
+/* We need something here just to make the tables come out ok.  */
+DEFOP (invalid2, 0, 0, 0, 0, 0x31)
+/* The "consumed" number for pick is wrong, but there's no way to
+   express the right thing.  */
+DEFOP (pick, 1, 0, 0, 1, 0x32)
+DEFOP (rot, 0, 0, 3, 3, 0x33)
+/* Both the argument and consumed numbers are dynamic for this one.  */
+DEFOP (printf, 0, 0, 0, 0, 0x34)