1 /* $NetBSD: db_disasm.h,v 1.8 2017/05/22 16:39:41 ragge 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 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 31 32 #define SIZE_BYTE 1 /* Byte */ 33 #define SIZE_WORD 2 /* Word */ 34 #define SIZE_LONG 4 /* Longword */ 35 #define SIZE_QWORD 8 /* Quadword */ 36 #define SIZE_OWORD 16 /* Octaword */ 37 38 /* 39 * The VAX instruction set has a variable length instruction format which 40 * may be as short as one byte and as long as needed depending on the type 41 * of instruction. [...] Each instruction consists of an opcode followed 42 * by zero to six operand specifiers whose number and type depend on the 43 * opcode. All operand specidiers are, themselves, of the same format -- 44 * i.e. an address mode plus additional information. 45 * 46 * [VAX Architecture Handbook, p.52: Instruction Format] 47 */ 48 49 typedef const struct { 50 const char *mnemonic; 51 const char *argdesc; 52 } vax_instr_t; 53 54 extern vax_instr_t vax_inst[256]; 55 extern vax_instr_t vax_inst2[0x56]; 56 57 long skip_opcode(long); 58 59 /* 60 * reasonably simple macro to gather all the reserved two-byte opcodes 61 * into only a few table entries... 62 */ 63 #define INDEX_OPCODE(x) \ 64 (((x) & 0xff00) == 0xfe00) ? 0 : \ 65 ((x) < 0xfd30) ? 0 : \ 66 ((x) < 0xfd80) ? (x) - 0xfd30 : \ 67 ((x) == 0xfd98) ? 0x50 : \ 68 ((x) == 0xfd99) ? 0x51 : \ 69 ((x) == 0xfdf6) ? 0x52 : \ 70 ((x) == 0xfdf7) ? 0x53 : \ 71 ((x) == 0xfffd) ? 0x54 : \ 72 ((x) == 0xfffe) ? 0x55 : 0 73