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instruction (which takes two immediate values). To facilitate this change, changed meaning of "len" in bytecode structure to be only the length of the offset (from being 1+length, the 1 being for the Mod/RM byte), and added a need_modrm flag similar to the need_sib flag in functionality. svn path=/trunk/yasm/; revision=22
101 lines
3.1 KiB
C
101 lines
3.1 KiB
C
/* $Id: bytecode.h,v 1.4 2001/05/21 20:17:51 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 (in bytes), 0 if none */
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unsigned char addrsize; /* 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 need_modrm; /* 1 if Mod/RM byte needed, 0 if not */
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unsigned char sib;
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unsigned char need_sib; /* 1 if SIB byte needed, 0 if not */
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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), 0 if none */
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unsigned char isrel;
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unsigned char isneg; /* the value has been explicitly negated */
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} immval;
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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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immval imm; /* immediate or relative value */
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unsigned char f_len_imm; /* final imm length */
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unsigned char f_rel_imm; /* 1 if final imm should be rel */
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unsigned char f_sign_imm; /* 1 if final imm should be signed */
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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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} 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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effaddr *ConvertImmToEA(effaddr *ptr, immval *im_ptr, unsigned char im_len);
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immval *ConvertIntToImm(immval *ptr, unsigned long int_val);
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void BuildBC_Insn(bytecode *bc,
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unsigned char opersize,
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unsigned char opcode_len,
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unsigned char op0,
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unsigned char op1,
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effaddr *ea_ptr,
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unsigned char spare,
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immval *im_ptr,
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unsigned char im_len,
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unsigned char im_sign,
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unsigned char im_rel);
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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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