sys/arch/vax/vax/db_disasm.h

   1 /*      $NetBSD: db_disasm.h,v 1.6 2009/02/16 23:55:31 christos Exp $ */
   2 /*
   3  * Copyright (c) 1996 Ludd, University of Lule}, Sweden.
   4  * All rights reserved.
   5  *
   6  * This code is derived from software contributed to Ludd by
   7  * Bertram Barth.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed at Ludd, University of
  20  *      Lule}, Sweden and its contributors.
  21  * 4. The name of the author may not be used to endorse or promote products
  22  *    derived from this software without specific prior written permission
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  25  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  26  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  27  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  28  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  29  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  30  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  31  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  32  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  33  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  */
  35
  36
  37
  38 #define SIZE_BYTE        1              /* Byte */
  39 #define SIZE_WORD        2              /* Word */
  40 #define SIZE_LONG        4              /* Longword */
  41 #define SIZE_QWORD       8              /* Quadword */
  42 #define SIZE_OWORD      16              /* Octaword */
  43
  44 /*
  45  * The VAX instruction set has a variable length instruction format which
  46  * may be as short as one byte and as long as needed depending on the type
  47  * of instruction. [...] Each instruction consists of an opcode followed
  48  * by zero to six operand specifiers whose number and type depend on the
  49  * opcode. All operand specidiers are, themselves, of the same format --
  50  * i.e. an address mode plus additional information.
  51  *
  52  * [VAX Architecture Handbook, p.52:  Instruction Format]
  53  */
  54
  55 typedef const struct {
  56         const char *mnemonic;
  57         const char *argdesc;
  58 } vax_instr_t;
  59
  60 extern vax_instr_t vax_inst[256];
  61 extern vax_instr_t vax_inst2[0x56];
  62
  63 long skip_opcode(long);
  64
  65 /*
  66  * reasonably simple macro to gather all the reserved two-byte opcodes
  67  * into only a few table entries...
  68  */
  69 #define INDEX_OPCODE(x) \
  70         (((x) & 0xff00) == 0xfe00) ? 0 : \
  71         ((x) < 0xfd30) ? 0 : \
  72         ((x) < 0xfd80) ? (x) - 0xfd30 : \
  73         ((x) == 0xfd98) ? 0x50 : \
  74         ((x) == 0xfd99) ? 0x51 : \
  75         ((x) == 0xfdf6) ? 0x52 : \
  76         ((x) == 0xfdf7) ? 0x53 : \
  77         ((x) == 0xfffd) ? 0x54 : \
  78         ((x) == 0xfffe) ? 0x55 : 0