1 /* udis86 - libudis86/decode.h 2 * 3 * Copyright (c) 2002-2009 Vivek Thampi 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without modification, 7 * are permitted provided that the following conditions are met: 8 * 9 * * Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * * Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR 19 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 22 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 24 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 #ifndef UD_DECODE_H 27 #define UD_DECODE_H 28 29 #include "types.h" 30 #include "itab.h" 31 32 #define MAX_INSN_LENGTH 15 33 34 /* itab prefix bits */ 35 #define P_none ( 0 ) 36 #define P_cast ( 1 << 0 ) 37 #define P_CAST(n) ( ( n >> 0 ) & 1 ) 38 #define P_rexb ( 1 << 1 ) 39 #define P_REXB(n) ( ( n >> 1 ) & 1 ) 40 #define P_inv64 ( 1 << 4 ) 41 #define P_INV64(n) ( ( n >> 4 ) & 1 ) 42 #define P_rexw ( 1 << 5 ) 43 #define P_REXW(n) ( ( n >> 5 ) & 1 ) 44 #define P_def64 ( 1 << 7 ) 45 #define P_DEF64(n) ( ( n >> 7 ) & 1 ) 46 #define P_rexr ( 1 << 8 ) 47 #define P_REXR(n) ( ( n >> 8 ) & 1 ) 48 #define P_oso ( 1 << 9 ) 49 #define P_OSO(n) ( ( n >> 9 ) & 1 ) 50 #define P_aso ( 1 << 10 ) 51 #define P_ASO(n) ( ( n >> 10 ) & 1 ) 52 #define P_rexx ( 1 << 11 ) 53 #define P_REXX(n) ( ( n >> 11 ) & 1 ) 54 #define P_ImpAddr ( 1 << 12 ) 55 #define P_IMPADDR(n) ( ( n >> 12 ) & 1 ) 56 #define P_seg ( 1 << 13 ) 57 #define P_SEG(n) ( ( n >> 13 ) & 1 ) 58 #define P_str ( 1 << 14 ) 59 #define P_STR(n) ( ( n >> 14 ) & 1 ) 60 #define P_strz ( 1 << 15 ) 61 #define P_STR_ZF(n) ( ( n >> 15 ) & 1 ) 62 63 /* operand type constants -- order is important! */ 64 65 enum ud_operand_code { 66 OP_NONE, 67 68 OP_A, OP_E, OP_M, OP_G, 69 OP_I, OP_F, 70 71 OP_R0, OP_R1, OP_R2, OP_R3, 72 OP_R4, OP_R5, OP_R6, OP_R7, 73 74 OP_AL, OP_CL, OP_DL, 75 OP_AX, OP_CX, OP_DX, 76 OP_eAX, OP_eCX, OP_eDX, 77 OP_rAX, OP_rCX, OP_rDX, 78 79 OP_ES, OP_CS, OP_SS, OP_DS, 80 OP_FS, OP_GS, 81 82 OP_ST0, OP_ST1, OP_ST2, OP_ST3, 83 OP_ST4, OP_ST5, OP_ST6, OP_ST7, 84 85 OP_J, OP_S, OP_O, 86 OP_I1, OP_I3, OP_sI, 87 88 OP_V, OP_W, OP_Q, OP_P, 89 OP_U, OP_N, OP_MU, 90 91 OP_R, OP_C, OP_D, 92 93 OP_MR 94 } UD_ATTR_PACKED; 95 96 97 /* operand size constants */ 98 99 enum ud_operand_size { 100 SZ_NA = 0, 101 SZ_Z = 1, 102 SZ_V = 2, 103 SZ_RDQ = 7, 104 105 /* the following values are used as is, 106 * and thus hard-coded. changing them 107 * will break internals 108 */ 109 SZ_B = 8, 110 SZ_W = 16, 111 SZ_D = 32, 112 SZ_Q = 64, 113 SZ_T = 80, 114 SZ_O = 128, 115 116 SZ_Y = 17, 117 118 /* 119 * complex size types, that encode sizes for operands 120 * of type MR (memory or register), for internal use 121 * only. Id space 256 and above. 122 */ 123 SZ_BD = (SZ_B << 8) | SZ_D, 124 SZ_BV = (SZ_B << 8) | SZ_V, 125 SZ_WD = (SZ_W << 8) | SZ_D, 126 SZ_WV = (SZ_W << 8) | SZ_V, 127 SZ_WY = (SZ_W << 8) | SZ_Y, 128 SZ_DY = (SZ_D << 8) | SZ_Y, 129 SZ_WO = (SZ_W << 8) | SZ_O, 130 SZ_DO = (SZ_D << 8) | SZ_O, 131 SZ_QO = (SZ_Q << 8) | SZ_O, 132 133 } UD_ATTR_PACKED; 134 135 136 /* resolve complex size type. 137 */ 138 static inline enum ud_operand_size 139 Mx_mem_size(enum ud_operand_size size) 140 { 141 return (size >> 8) & 0xff; 142 } 143 144 static inline enum ud_operand_size 145 Mx_reg_size(enum ud_operand_size size) 146 { 147 return size & 0xff; 148 } 149 150 /* A single operand of an entry in the instruction table. 151 * (internal use only) 152 */ 153 struct ud_itab_entry_operand 154 { 155 enum ud_operand_code type; 156 enum ud_operand_size size; 157 }; 158 159 160 /* A single entry in an instruction table. 161 *(internal use only) 162 */ 163 struct ud_itab_entry 164 { 165 enum ud_mnemonic_code mnemonic; 166 struct ud_itab_entry_operand operand1; 167 struct ud_itab_entry_operand operand2; 168 struct ud_itab_entry_operand operand3; 169 uint32_t prefix; 170 }; 171 172 struct ud_lookup_table_list_entry { 173 const uint16_t *table; 174 enum ud_table_type type; 175 const char *meta; 176 }; 177 178 179 180 static inline int 181 ud_opcode_field_sext(uint8_t primary_opcode) 182 { 183 return (primary_opcode & 0x02) != 0; 184 } 185 186 extern struct ud_itab_entry ud_itab[]; 187 extern struct ud_lookup_table_list_entry ud_lookup_table_list[]; 188 189 #endif /* UD_DECODE_H */ 190 191 /* vim:cindent 192 * vim:expandtab 193 * vim:ts=4 194 * vim:sw=4 195 */ 196
