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https://github.com/yasm/yasm
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100 lines
3 KiB
C
100 lines
3 KiB
C
/* $Id: bytecode.h,v 1.1 2001/05/15 05:28:06 peter Exp $
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* Bytecode utility functions header file
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*
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* Copyright (C) 2001 Peter Johnson
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*
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* This file is part of YASM.
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*
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* YASM is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* YASM 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _BYTECODE_H_
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#define _BYTECODE_H_
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typedef struct effaddr_s {
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unsigned long offset;
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unsigned char len; /* length of offset + 1 (for RM) (in bytes) */
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unsigned char addrsize; /* 8, 16, or 32, 0 indicates no override */
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unsigned char segment; /* segment override, 0 if none */
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unsigned char modrm;
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unsigned char sib;
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unsigned char need_sib;
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} effaddr;
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typedef struct immval_s {
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unsigned long val;
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unsigned char len; /* length of val (in bytes) */
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} immval;
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typedef struct relval_s {
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unsigned long val;
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unsigned char len; /* length of val (in bytes) */
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} relval;
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typedef struct bytecode_s {
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struct bytecode_s *next;
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enum { BC_INSN, BC_DATA, BC_RESERVE } type;
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union {
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struct {
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effaddr ea; /* effective address */
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union {
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immval im; /* immediate value */
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relval rel;
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} imm;
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unsigned char opcode[2]; /* opcode */
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unsigned char opcode_len;
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unsigned char opersize; /* 0 indicates no override */
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unsigned char lockrep_pre; /* 0 indicates no prefix */
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unsigned char isrel;
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} insn;
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struct {
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unsigned char *data;
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} data;
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} data;
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unsigned long len; /* total length of entire bytecode */
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/* where it came from */
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char *filename;
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unsigned int lineno;
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/* other assembler state info */
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unsigned long offset;
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unsigned int mode_bits;
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} bytecode;
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effaddr *ConvertIntToEA(effaddr *ptr, unsigned long int_val);
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effaddr *ConvertRegToEA(effaddr *ptr, unsigned long reg);
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immval *ConvertIntToImm(immval *ptr, unsigned long int_val);
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relval *ConvertImmToRel(relval *ptr, immval *im_ptr,
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unsigned char rel_forcelen);
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void BuildBC_Insn(bytecode *bc, unsigned char opersize,
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unsigned char opcode_len, unsigned char op0, unsigned char op1,
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effaddr *ea_ptr, unsigned char spare, immval *im_ptr,
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unsigned char im_forcelen);
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void BuildBC_Insn_Rel(bytecode *bc, unsigned char opersize,
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unsigned char opcode_len, unsigned char op0, unsigned char op1,
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effaddr *ea_ptr, unsigned char spare, relval *rel_ptr);
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unsigned char *ConvertBCInsnToBytes(unsigned char *ptr, bytecode *bc, int *len);
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void DebugPrintBC(bytecode *bc);
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#endif
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