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125 lines
2.3 KiB
C
125 lines
2.3 KiB
C
/********************************************************************************
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* libemu
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*
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* - x86 shellcode emulation -
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*
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*
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* Copyright (C) 2007 Paul Baecher & Markus Koetter
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*
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* contact nepenthesdev@users.sourceforge.net
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*
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*******************************************************************************/
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#ifndef HAVE_EMU_CPU_INSTRUCTION
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#define HAVE_EMU_CPU_INSTRUCTION
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct emu_cpu_instruction;
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struct emu_cpu;
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struct emu_cpu_instruction_info
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{
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int32_t (*function)(struct emu_cpu *, struct emu_cpu_instruction *);
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const char *name;
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struct
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{
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uint8_t s_bit : 1;
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uint8_t w_bit : 1;
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uint8_t modrm_byte : 4;
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uint8_t imm_data : 3;
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uint8_t disp_data : 3;
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uint8_t level : 2;
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uint8_t type : 2;
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uint8_t fpu_info : 1;
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} format;
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};
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struct emu_cpu_instruction
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{
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uint8_t opc;
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uint8_t opc_2nd;
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uint16_t prefixes;
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uint8_t s_bit : 1;
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uint8_t w_bit : 1;
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uint8_t operand_size : 2;
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struct /* mod r/m data */
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{
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union
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{
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uint8_t mod : 2;
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uint8_t x : 2;
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};
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union
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{
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uint8_t reg1 : 3;
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uint8_t opc : 3;
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uint8_t sreg3 : 3;
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uint8_t y : 3;
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};
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union
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{
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uint8_t reg : 3;
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uint8_t reg2 : 3;
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uint8_t rm : 3;
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uint8_t z : 3;
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};
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struct
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{
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uint8_t scale : 2;
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uint8_t index : 3;
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uint8_t base : 3;
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} sib;
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union
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{
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uint8_t s8;
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uint16_t s16;
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uint32_t s32;
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} disp;
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uint32_t ea;
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} modrm;
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uint32_t imm;
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uint16_t *imm16;
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uint8_t *imm8;
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int32_t disp;
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};
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#ifdef __cplusplus
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}
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#endif
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#endif
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