/* udis86 - libudis86/decode.h
*
* Copyright (c) 2002-2009 Vivek Thampi
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef UD_DECODE_H
#define UD_DECODE_H
#include "types.h"
#include "itab.h"
#define MAX_INSN_LENGTH 15
/* itab prefix bits */
#define P_none ( 0 )
#define P_cast ( 1 << 0 )
#define P_CAST(n) ( ( n >> 0 ) & 1 )
#define P_rexb ( 1 << 1 )
#define P_REXB(n) ( ( n >> 1 ) & 1 )
#define P_inv64 ( 1 << 4 )
#define P_INV64(n) ( ( n >> 4 ) & 1 )
#define P_rexw ( 1 << 5 )
#define P_REXW(n) ( ( n >> 5 ) & 1 )
#define P_def64 ( 1 << 7 )
#define P_DEF64(n) ( ( n >> 7 ) & 1 )
#define P_rexr ( 1 << 8 )
#define P_REXR(n) ( ( n >> 8 ) & 1 )
#define P_oso ( 1 << 9 )
#define P_OSO(n) ( ( n >> 9 ) & 1 )
#define P_aso ( 1 << 10 )
#define P_ASO(n) ( ( n >> 10 ) & 1 )
#define P_rexx ( 1 << 11 )
#define P_REXX(n) ( ( n >> 11 ) & 1 )
#define P_ImpAddr ( 1 << 12 )
#define P_IMPADDR(n) ( ( n >> 12 ) & 1 )
#define P_seg ( 1 << 13 )
#define P_SEG(n) ( ( n >> 13 ) & 1 )
#define P_str ( 1 << 14 )
#define P_STR(n) ( ( n >> 14 ) & 1 )
#define P_strz ( 1 << 15 )
#define P_STR_ZF(n) ( ( n >> 15 ) & 1 )
/* operand type constants -- order is important! */
enum ud_operand_code {
OP_NONE,
OP_A, OP_E, OP_M, OP_G,
OP_I, OP_F,
OP_R0, OP_R1, OP_R2, OP_R3,
OP_R4, OP_R5, OP_R6, OP_R7,
OP_AL, OP_CL, OP_DL,
OP_AX, OP_CX, OP_DX,
OP_eAX, OP_eCX, OP_eDX,
OP_rAX, OP_rCX, OP_rDX,
OP_ES, OP_CS, OP_SS, OP_DS,
OP_FS, OP_GS,
OP_ST0, OP_ST1, OP_ST2, OP_ST3,
OP_ST4, OP_ST5, OP_ST6, OP_ST7,
OP_J, OP_S, OP_O,
OP_I1, OP_I3, OP_sI,
OP_V, OP_W, OP_Q, OP_P,
OP_U, OP_N, OP_MU,
OP_R, OP_C, OP_D,
OP_MR
} UD_ATTR_PACKED;
/* operand size constants */
enum ud_operand_size {
SZ_NA = 0,
SZ_Z = 1,
SZ_V = 2,
SZ_RDQ = 7,
/* the following values are used as is,
* and thus hard-coded. changing them
* will break internals
*/
SZ_B = 8,
SZ_W = 16,
SZ_D = 32,
SZ_Q = 64,
SZ_T = 80,
SZ_O = 128,
SZ_Y = 17,
/*
* complex size types, that encode sizes for operands
* of type MR (memory or register), for internal use
* only. Id space 256 and above.
*/
SZ_BD = (SZ_B << 8) | SZ_D,
SZ_BV = (SZ_B << 8) | SZ_V,
SZ_WD = (SZ_W << 8) | SZ_D,
SZ_WV = (SZ_W << 8) | SZ_V,
SZ_WY = (SZ_W << 8) | SZ_Y,
SZ_DY = (SZ_D << 8) | SZ_Y,
SZ_WO = (SZ_W << 8) | SZ_O,
SZ_DO = (SZ_D << 8) | SZ_O,
SZ_QO = (SZ_Q << 8) | SZ_O,
} UD_ATTR_PACKED;
/* resolve complex size type.
*/
static inline enum ud_operand_size
Mx_mem_size(enum ud_operand_size size)
{
return (size >> 8) & 0xff;
}
static inline enum ud_operand_size
Mx_reg_size(enum ud_operand_size size)
{
return size & 0xff;
}
/* A single operand of an entry in the instruction table.
* (internal use only)
*/
struct ud_itab_entry_operand
{
enum ud_operand_code type;
enum ud_operand_size size;
};
/* A single entry in an instruction table.
*(internal use only)
*/
struct ud_itab_entry
{
enum ud_mnemonic_code mnemonic;
struct ud_itab_entry_operand operand1;
struct ud_itab_entry_operand operand2;
struct ud_itab_entry_operand operand3;
uint32_t prefix;
};
struct ud_lookup_table_list_entry {
const uint16_t *table;
enum ud_table_type type;
const char *meta;
};
static inline int
ud_opcode_field_sext(uint8_t primary_opcode)
{
return (primary_opcode & 0x02) != 0;
}
extern struct ud_itab_entry ud_itab[];
extern struct ud_lookup_table_list_entry ud_lookup_table_list[];
#endif /* UD_DECODE_H */
/* vim:cindent
* vim:expandtab
* vim:ts=4
* vim:sw=4
*/