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freebsd/usr.bin/doscmd/i386-pinsn.c
David E. O'Brien efad9abf1c Update FreeBSD SCM IDs.
2002-03-07 12:52:27 +00:00

1963 lines
46 KiB
C
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#ifdef DISASSEMBLER
/* Print i386 instructions for GDB, the GNU debugger.
Copyright (C) 1988, 1989 Free Software Foundation, Inc.
This file is part of GDB.
GDB is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 1, or (at your option)
any later version.
GDB is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GDB; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/*
* 80386 instruction printer by Pace Willisson (pace@prep.ai.mit.edu)
* July 1988
*/
/*
* The main tables describing the instructions is essentially a copy
* of the "Opcode Map" chapter (Appendix A) of the Intel 80386
* Programmers Manual. Usually, there is a capital letter, followed
* by a small letter. The capital letter tell the addressing mode,
* and the small letter tells about the operand size. Refer to
* the Intel manual for details.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stdio.h>
#include <ctype.h>
#include "doscmd.h"
static void OP_E(int), OP_indirE(int), OP_G(int);
static void OP_I(int), OP_sI(int), OP_REG(int), OP_J(int), OP_SEG(int);
static void OP_DIR(int), OP_OFF(int), OP_DSSI(int), OP_ESDI(int);
static void OP_C(int), OP_D(int), OP_T(int), OP_rm(int);
static void OP_ST(int), OP_STi(int);
static void append_pc(unsigned long);
static void append_prefix(void);
static void dofloat(void);
static int get16(void);
static int get32(void);
static void oappend(const char *);
static void putop(const char *);
#define Eb OP_E, b_mode
#define indirEb OP_indirE, b_mode
#define Gb OP_G, b_mode
#define Ev OP_E, v_mode
#define indirEv OP_indirE, v_mode
#define Ew OP_E, w_mode
#define Ma OP_E, v_mode
#define M OP_E, 0
#define Mp OP_E, 0 /* ? */
#define Gv OP_G, v_mode
#define Gw OP_G, w_mode
#define Rw OP_rm, w_mode
#define Rd OP_rm, d_mode
#define Ib OP_I, b_mode
#define sIb OP_sI, b_mode /* sign extended byte */
#define Iv OP_I, v_mode
#define Iw OP_I, w_mode
#define Jb OP_J, b_mode
#define Jv OP_J, v_mode
#define Cd OP_C, d_mode
#define Dd OP_D, d_mode
#define Td OP_T, d_mode
#define eAX OP_REG, eAX_reg
#define eBX OP_REG, eBX_reg
#define eCX OP_REG, eCX_reg
#define eDX OP_REG, eDX_reg
#define eSP OP_REG, eSP_reg
#define eBP OP_REG, eBP_reg
#define eSI OP_REG, eSI_reg
#define eDI OP_REG, eDI_reg
#define AL OP_REG, al_reg
#define CL OP_REG, cl_reg
#define DL OP_REG, dl_reg
#define BL OP_REG, bl_reg
#define AH OP_REG, ah_reg
#define CH OP_REG, ch_reg
#define DH OP_REG, dh_reg
#define BH OP_REG, bh_reg
#define AX OP_REG, ax_reg
#define DX OP_REG, dx_reg
#define indirDX OP_REG, indir_dx_reg
#define Sw OP_SEG, w_mode
#define Ap OP_DIR, lptr
#define Av OP_DIR, v_mode
#define Ob OP_OFF, b_mode
#define Ov OP_OFF, v_mode
#define Xb OP_DSSI, b_mode
#define Xv OP_DSSI, v_mode
#define Yb OP_ESDI, b_mode
#define Yv OP_ESDI, v_mode
#define es OP_REG, es_reg
#define ss OP_REG, ss_reg
#define cs OP_REG, cs_reg
#define ds OP_REG, ds_reg
#define fs OP_REG, fs_reg
#define gs OP_REG, gs_reg
#define b_mode 1
#define v_mode 2
#define w_mode 3
#define d_mode 4
#define es_reg 100
#define cs_reg 101
#define ss_reg 102
#define ds_reg 103
#define fs_reg 104
#define gs_reg 105
#define eAX_reg 107
#define eCX_reg 108
#define eDX_reg 109
#define eBX_reg 110
#define eSP_reg 111
#define eBP_reg 112
#define eSI_reg 113
#define eDI_reg 114
#define lptr 115
#define al_reg 116
#define cl_reg 117
#define dl_reg 118
#define bl_reg 119
#define ah_reg 120
#define ch_reg 121
#define dh_reg 122
#define bh_reg 123
#define ax_reg 124
#define cx_reg 125
#define dx_reg 126
#define bx_reg 127
#define sp_reg 128
#define bp_reg 129
#define si_reg 130
#define di_reg 131
#define indir_dx_reg 150
#define NOFUNC NULL, 0
#define GRP1b NULL, NULL, 0, NOFUNC, NOFUNC
#define GRP1S NULL, NULL, 1, NOFUNC, NOFUNC
#define GRP1Ss NULL, NULL, 2, NOFUNC, NOFUNC
#define GRP2b NULL, NULL, 3, NOFUNC, NOFUNC
#define GRP2S NULL, NULL, 4, NOFUNC, NOFUNC
#define GRP2b_one NULL, NULL, 5, NOFUNC, NOFUNC
#define GRP2S_one NULL, NULL, 6, NOFUNC, NOFUNC
#define GRP2b_cl NULL, NULL, 7, NOFUNC, NOFUNC
#define GRP2S_cl NULL, NULL, 8, NOFUNC, NOFUNC
#define GRP3b NULL, NULL, 9, NOFUNC, NOFUNC
#define GRP3S NULL, NULL, 10, NOFUNC, NOFUNC
#define GRP4 NULL, NULL, 11, NOFUNC, NOFUNC
#define GRP5 NULL, NULL, 12, NOFUNC, NOFUNC
#define GRP6 NULL, NULL, 13, NOFUNC, NOFUNC
#define GRP7 NULL, NULL, 14, NOFUNC, NOFUNC
#define GRP8 NULL, NULL, 15, NOFUNC, NOFUNC
#define FLOATCODE 50
#define FLOAT NULL, NULL, FLOATCODE, NOFUNC, NOFUNC
struct dis386 {
const char *name;
void (*op1)(int);
int bytemode1;
void (*op2)(int);
int bytemode2;
void (*op3)(int);
int bytemode3;
};
struct dis386 dis386[] = {
/* 00 */
{ "addb", Eb, Gb, NOFUNC },
{ "addS", Ev, Gv, NOFUNC },
{ "addb", Gb, Eb, NOFUNC },
{ "addS", Gv, Ev, NOFUNC },
{ "addb", AL, Ib, NOFUNC },
{ "addS", eAX, Iv, NOFUNC },
{ "pushl", es, NOFUNC, NOFUNC },
{ "popl", es, NOFUNC, NOFUNC },
/* 08 */
{ "orb", Eb, Gb, NOFUNC },
{ "orS", Ev, Gv, NOFUNC },
{ "orb", Gb, Eb, NOFUNC },
{ "orS", Gv, Ev, NOFUNC },
{ "orb", AL, Ib, NOFUNC },
{ "orS", eAX, Iv, NOFUNC },
{ "pushl", cs, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC }, /* extended opcode escape */
/* 10 */
{ "adcb", Eb, Gb, NOFUNC },
{ "adcS", Ev, Gv, NOFUNC },
{ "adcb", Gb, Eb, NOFUNC },
{ "adcS", Gv, Ev, NOFUNC },
{ "adcb", AL, Ib, NOFUNC },
{ "adcS", eAX, Iv, NOFUNC },
{ "pushl", ss, NOFUNC, NOFUNC },
{ "popl", ss, NOFUNC, NOFUNC },
/* 18 */
{ "sbbb", Eb, Gb, NOFUNC },
{ "sbbS", Ev, Gv, NOFUNC },
{ "sbbb", Gb, Eb, NOFUNC },
{ "sbbS", Gv, Ev, NOFUNC },
{ "sbbb", AL, Ib, NOFUNC },
{ "sbbS", eAX, Iv, NOFUNC },
{ "pushl", ds, NOFUNC, NOFUNC },
{ "popl", ds, NOFUNC, NOFUNC },
/* 20 */
{ "andb", Eb, Gb, NOFUNC },
{ "andS", Ev, Gv, NOFUNC },
{ "andb", Gb, Eb, NOFUNC },
{ "andS", Gv, Ev, NOFUNC },
{ "andb", AL, Ib, NOFUNC },
{ "andS", eAX, Iv, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC}, /* SEG ES prefix */
{ "daa", NOFUNC, NOFUNC, NOFUNC },
/* 28 */
{ "subb", Eb, Gb, NOFUNC },
{ "subS", Ev, Gv, NOFUNC },
{ "subb", Gb, Eb, NOFUNC },
{ "subS", Gv, Ev, NOFUNC },
{ "subb", AL, Ib, NOFUNC },
{ "subS", eAX, Iv, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC }, /* SEG CS prefix */
{ "das", NOFUNC, NOFUNC, NOFUNC },
/* 30 */
{ "xorb", Eb, Gb, NOFUNC },
{ "xorS", Ev, Gv, NOFUNC },
{ "xorb", Gb, Eb, NOFUNC },
{ "xorS", Gv, Ev, NOFUNC },
{ "xorb", AL, Ib, NOFUNC },
{ "xorS", eAX, Iv, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC }, /* SEG SS prefix */
{ "aaa", NOFUNC, NOFUNC, NOFUNC },
/* 38 */
{ "cmpb", Eb, Gb, NOFUNC },
{ "cmpS", Ev, Gv, NOFUNC },
{ "cmpb", Gb, Eb, NOFUNC },
{ "cmpS", Gv, Ev, NOFUNC },
{ "cmpb", AL, Ib, NOFUNC },
{ "cmpS", eAX, Iv, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC }, /* SEG DS prefix */
{ "aas", NOFUNC, NOFUNC, NOFUNC },
/* 40 */
{ "incS", eAX, NOFUNC, NOFUNC },
{ "incS", eCX, NOFUNC, NOFUNC },
{ "incS", eDX, NOFUNC, NOFUNC },
{ "incS", eBX, NOFUNC, NOFUNC },
{ "incS", eSP, NOFUNC, NOFUNC },
{ "incS", eBP, NOFUNC, NOFUNC },
{ "incS", eSI, NOFUNC, NOFUNC },
{ "incS", eDI, NOFUNC, NOFUNC },
/* 48 */
{ "decS", eAX, NOFUNC, NOFUNC },
{ "decS", eCX, NOFUNC, NOFUNC },
{ "decS", eDX, NOFUNC, NOFUNC },
{ "decS", eBX, NOFUNC, NOFUNC },
{ "decS", eSP, NOFUNC, NOFUNC },
{ "decS", eBP, NOFUNC, NOFUNC },
{ "decS", eSI, NOFUNC, NOFUNC },
{ "decS", eDI, NOFUNC, NOFUNC },
/* 50 */
{ "pushS", eAX, NOFUNC, NOFUNC },
{ "pushS", eCX, NOFUNC, NOFUNC },
{ "pushS", eDX, NOFUNC, NOFUNC },
{ "pushS", eBX, NOFUNC, NOFUNC },
{ "pushS", eSP, NOFUNC, NOFUNC },
{ "pushS", eBP, NOFUNC, NOFUNC },
{ "pushS", eSI, NOFUNC, NOFUNC },
{ "pushS", eDI, NOFUNC, NOFUNC },
/* 58 */
{ "popS", eAX, NOFUNC, NOFUNC },
{ "popS", eCX, NOFUNC, NOFUNC },
{ "popS", eDX, NOFUNC, NOFUNC },
{ "popS", eBX, NOFUNC, NOFUNC },
{ "popS", eSP, NOFUNC, NOFUNC },
{ "popS", eBP, NOFUNC, NOFUNC },
{ "popS", eSI, NOFUNC, NOFUNC },
{ "popS", eDI, NOFUNC, NOFUNC },
/* 60 */
{ "pusha", NOFUNC, NOFUNC, NOFUNC },
{ "popa", NOFUNC, NOFUNC, NOFUNC },
{ "boundS", Gv, Ma, NOFUNC },
{ "arpl", Ew, Gw, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC }, /* seg fs */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC }, /* seg gs */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC }, /* op size prefix */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC }, /* adr size prefix */
/* 68 */
{ "pushS", Iv, NOFUNC, NOFUNC }, /* 386 book wrong */
{ "imulS", Gv, Ev, Iv },
{ "pushl", sIb, NOFUNC, NOFUNC }, /* push of byte really pushes 4 bytes */
{ "imulS", Gv, Ev, Ib },
{ "insb", Yb, indirDX, NOFUNC },
{ "insS", Yv, indirDX, NOFUNC },
{ "outsb", indirDX, Xb, NOFUNC },
{ "outsS", indirDX, Xv, NOFUNC },
/* 70 */
{ "jo", Jb, NOFUNC, NOFUNC },
{ "jno", Jb, NOFUNC, NOFUNC },
{ "jb", Jb, NOFUNC, NOFUNC },
{ "jae", Jb, NOFUNC, NOFUNC },
{ "je", Jb, NOFUNC, NOFUNC },
{ "jne", Jb, NOFUNC, NOFUNC },
{ "jbe", Jb, NOFUNC, NOFUNC },
{ "ja", Jb, NOFUNC, NOFUNC },
/* 78 */
{ "js", Jb, NOFUNC, NOFUNC },
{ "jns", Jb, NOFUNC, NOFUNC },
{ "jp", Jb, NOFUNC, NOFUNC },
{ "jnp", Jb, NOFUNC, NOFUNC },
{ "jl", Jb, NOFUNC, NOFUNC },
{ "jnl", Jb, NOFUNC, NOFUNC },
{ "jle", Jb, NOFUNC, NOFUNC },
{ "jg", Jb, NOFUNC, NOFUNC },
/* 80 */
{ GRP1b },
{ GRP1S },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ GRP1Ss },
{ "testb", Eb, Gb, NOFUNC },
{ "testS", Ev, Gv, NOFUNC },
{ "xchgb", Eb, Gb, NOFUNC },
{ "xchgS", Ev, Gv, NOFUNC },
/* 88 */
{ "movb", Eb, Gb, NOFUNC },
{ "movS", Ev, Gv, NOFUNC },
{ "movb", Gb, Eb, NOFUNC },
{ "movS", Gv, Ev, NOFUNC },
{ "movw", Ew, Sw, NOFUNC },
{ "leaS", Gv, M, NOFUNC },
{ "movw", Sw, Ew, NOFUNC },
{ "popS", Ev, NOFUNC, NOFUNC },
/* 90 */
{ "nop", NOFUNC, NOFUNC, NOFUNC },
{ "xchgS", eCX, eAX, NOFUNC },
{ "xchgS", eDX, eAX, NOFUNC },
{ "xchgS", eBX, eAX, NOFUNC },
{ "xchgS", eSP, eAX, NOFUNC },
{ "xchgS", eBP, eAX, NOFUNC },
{ "xchgS", eSI, eAX, NOFUNC },
{ "xchgS", eDI, eAX, NOFUNC },
/* 98 */
{ "cwtl", NOFUNC, NOFUNC, NOFUNC },
{ "cltd", NOFUNC, NOFUNC, NOFUNC },
{ "lcall", Ap, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC }, /* fwait */
{ "pushf", NOFUNC, NOFUNC, NOFUNC },
{ "popf", NOFUNC, NOFUNC, NOFUNC },
{ "sahf", NOFUNC, NOFUNC, NOFUNC },
{ "lahf", NOFUNC, NOFUNC, NOFUNC },
/* a0 */
{ "movb", AL, Ob, NOFUNC },
{ "movS", eAX, Ov, NOFUNC },
{ "movb", Ob, AL, NOFUNC },
{ "movS", Ov, eAX, NOFUNC },
{ "movsb", Yb, Xb, NOFUNC },
{ "movsS", Yv, Xv, NOFUNC },
{ "cmpsb", Xb, Yb, NOFUNC },
{ "cmpsS", Xv, Yv, NOFUNC },
/* a8 */
{ "testb", AL, Ib, NOFUNC },
{ "testS", eAX, Iv, NOFUNC },
{ "stosb", Yb, AL, NOFUNC },
{ "stosS", Yv, eAX, NOFUNC },
{ "lodsb", AL, Xb, NOFUNC },
{ "lodsS", eAX, Xv, NOFUNC },
{ "scasb", AL, Yb, NOFUNC },
{ "scasS", eAX, Yv, NOFUNC },
/* b0 */
{ "movb", AL, Ib, NOFUNC },
{ "movb", CL, Ib, NOFUNC },
{ "movb", DL, Ib, NOFUNC },
{ "movb", BL, Ib, NOFUNC },
{ "movb", AH, Ib, NOFUNC },
{ "movb", CH, Ib, NOFUNC },
{ "movb", DH, Ib, NOFUNC },
{ "movb", BH, Ib, NOFUNC },
/* b8 */
{ "movS", eAX, Iv, NOFUNC },
{ "movS", eCX, Iv, NOFUNC },
{ "movS", eDX, Iv, NOFUNC },
{ "movS", eBX, Iv, NOFUNC },
{ "movS", eSP, Iv, NOFUNC },
{ "movS", eBP, Iv, NOFUNC },
{ "movS", eSI, Iv, NOFUNC },
{ "movS", eDI, Iv, NOFUNC },
/* c0 */
{ GRP2b },
{ GRP2S },
{ "ret", Iw, NOFUNC, NOFUNC },
{ "ret", NOFUNC, NOFUNC, NOFUNC },
{ "lesS", Gv, Mp, NOFUNC },
{ "ldsS", Gv, Mp, NOFUNC },
{ "movb", Eb, Ib, NOFUNC },
{ "movS", Ev, Iv, NOFUNC },
/* c8 */
{ "enter", Iw, Ib, NOFUNC },
{ "leave", NOFUNC, NOFUNC, NOFUNC },
{ "lret", Iw, NOFUNC, NOFUNC },
{ "lret", NOFUNC, NOFUNC, NOFUNC },
{ "int3", NOFUNC, NOFUNC, NOFUNC },
{ "int", Ib, NOFUNC, NOFUNC },
{ "into", NOFUNC, NOFUNC, NOFUNC },
{ "iret", NOFUNC, NOFUNC, NOFUNC },
/* d0 */
{ GRP2b_one },
{ GRP2S_one },
{ GRP2b_cl },
{ GRP2S_cl },
{ "aam", Ib, NOFUNC, NOFUNC },
{ "aad", Ib, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "xlat", NOFUNC, NOFUNC, NOFUNC },
/* d8 */
{ FLOAT },
{ FLOAT },
{ FLOAT },
{ FLOAT },
{ FLOAT },
{ FLOAT },
{ FLOAT },
{ FLOAT },
/* e0 */
{ "loopne", Jb, NOFUNC, NOFUNC },
{ "loope", Jb, NOFUNC, NOFUNC },
{ "loop", Jb, NOFUNC, NOFUNC },
{ "jCcxz", Jb, NOFUNC, NOFUNC },
{ "inb", AL, Ib, NOFUNC },
{ "inS", eAX, Ib, NOFUNC },
{ "outb", Ib, AL, NOFUNC },
{ "outS", Ib, eAX, NOFUNC },
/* e8 */
{ "call", Av, NOFUNC, NOFUNC },
{ "jmp", Jv, NOFUNC, NOFUNC },
{ "ljmp", Ap, NOFUNC, NOFUNC },
{ "jmp", Jb, NOFUNC, NOFUNC },
{ "inb", AL, indirDX, NOFUNC },
{ "inS", eAX, indirDX, NOFUNC },
{ "outb", indirDX, AL, NOFUNC },
{ "outS", indirDX, eAX, NOFUNC },
/* f0 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC }, /* lock prefix */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC }, /* repne */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC }, /* repz */
{ "hlt", NOFUNC, NOFUNC, NOFUNC },
{ "cmc", NOFUNC, NOFUNC, NOFUNC },
{ GRP3b },
{ GRP3S },
/* f8 */
{ "clc", NOFUNC, NOFUNC, NOFUNC },
{ "stc", NOFUNC, NOFUNC, NOFUNC },
{ "cli", NOFUNC, NOFUNC, NOFUNC },
{ "sti", NOFUNC, NOFUNC, NOFUNC },
{ "cld", NOFUNC, NOFUNC, NOFUNC },
{ "std", NOFUNC, NOFUNC, NOFUNC },
{ GRP4 },
{ GRP5 },
};
struct dis386 dis386_twobyte[] = {
/* 00 */
{ GRP6 },
{ GRP7 },
{ "larS", Gv, Ew, NOFUNC },
{ "lslS", Gv, Ew, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "clts", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* 08 */
{ "invd", NOFUNC, NOFUNC, NOFUNC },
{ "wbinvd", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* 10 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* 18 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* 20 */
/* these are all backward in appendix A of the intel book */
{ "movl", Rd, Cd, NOFUNC },
{ "movl", Rd, Dd, NOFUNC },
{ "movl", Cd, Rd, NOFUNC },
{ "movl", Dd, Rd, NOFUNC },
{ "movl", Rd, Td, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "movl", Td, Rd, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* 28 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* 30 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* 38 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* 40 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* 48 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* 50 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* 58 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* 60 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* 68 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* 70 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* 78 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* 80 */
{ "jo", Jv, NOFUNC, NOFUNC },
{ "jno", Jv, NOFUNC, NOFUNC },
{ "jb", Jv, NOFUNC, NOFUNC },
{ "jae", Jv, NOFUNC, NOFUNC },
{ "je", Jv, NOFUNC, NOFUNC },
{ "jne", Jv, NOFUNC, NOFUNC },
{ "jbe", Jv, NOFUNC, NOFUNC },
{ "ja", Jv, NOFUNC, NOFUNC },
/* 88 */
{ "js", Jv, NOFUNC, NOFUNC },
{ "jns", Jv, NOFUNC, NOFUNC },
{ "jp", Jv, NOFUNC, NOFUNC },
{ "jnp", Jv, NOFUNC, NOFUNC },
{ "jl", Jv, NOFUNC, NOFUNC },
{ "jge", Jv, NOFUNC, NOFUNC },
{ "jle", Jv, NOFUNC, NOFUNC },
{ "jg", Jv, NOFUNC, NOFUNC },
/* 90 */
{ "seto", Eb, NOFUNC, NOFUNC },
{ "setno", Eb, NOFUNC, NOFUNC },
{ "setb", Eb, NOFUNC, NOFUNC },
{ "setae", Eb, NOFUNC, NOFUNC },
{ "sete", Eb, NOFUNC, NOFUNC },
{ "setne", Eb, NOFUNC, NOFUNC },
{ "setbe", Eb, NOFUNC, NOFUNC },
{ "seta", Eb, NOFUNC, NOFUNC },
/* 98 */
{ "sets", Eb, NOFUNC, NOFUNC },
{ "setns", Eb, NOFUNC, NOFUNC },
{ "setp", Eb, NOFUNC, NOFUNC },
{ "setnp", Eb, NOFUNC, NOFUNC },
{ "setl", Eb, NOFUNC, NOFUNC },
{ "setge", Eb, NOFUNC, NOFUNC },
{ "setle", Eb, NOFUNC, NOFUNC },
{ "setg", Eb, NOFUNC, NOFUNC },
/* a0 */
{ "pushl", fs, NOFUNC, NOFUNC },
{ "popl", fs, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "btS", Ev, Gv, NOFUNC },
{ "shldS", Ev, Gv, Ib },
{ "shldS", Ev, Gv, CL },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* a8 */
{ "pushl", gs, NOFUNC, NOFUNC },
{ "popl", gs, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "btsS", Ev, Gv, NOFUNC },
{ "shrdS", Ev, Gv, Ib },
{ "shrdS", Ev, Gv, CL },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "imulS", Gv, Ev, NOFUNC },
/* b0 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "lssS", Gv, Mp, NOFUNC }, /* 386 lists only Mp */
{ "btrS", Ev, Gv, NOFUNC },
{ "lfsS", Gv, Mp, NOFUNC }, /* 386 lists only Mp */
{ "lgsS", Gv, Mp, NOFUNC }, /* 386 lists only Mp */
{ "movzbS", Gv, Eb, NOFUNC },
{ "movzwS", Gv, Ew, NOFUNC },
/* b8 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ GRP8 },
{ "btcS", Ev, Gv, NOFUNC },
{ "bsfS", Gv, Ev, NOFUNC },
{ "bsrS", Gv, Ev, NOFUNC },
{ "movsbS", Gv, Eb, NOFUNC },
{ "movswS", Gv, Ew, NOFUNC },
/* c0 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* c8 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* d0 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* d8 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* e0 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* e8 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* f0 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
/* f8 */
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
};
static char obuf[100];
static char *obufp;
static char scratchbuf[100];
static unsigned char *start_codep;
static unsigned char *codep;
static int mod;
static int rm;
static int reg;
static const char *names32[]={
"%eax","%ecx","%edx","%ebx", "%esp","%ebp","%esi","%edi",
};
static const char *names16[] = {
"%ax","%cx","%dx","%bx","%sp","%bp","%si","%di",
};
static const char *names8[] = {
"%al","%cl","%dl","%bl","%ah","%ch","%dh","%bh",
};
static const char *names_seg[] = {
"%es","%cs","%ss","%ds","%fs","%gs","%?","%?",
};
static const char *names16_pairs[] = {
"%bx+%si","%bx+%di","%bp+%si","%bp+%di","%si","%di","%bp","%bx",
};
struct dis386 grps[][8] = {
/* GRP1b */
{
{ "addb", Eb, Ib, NOFUNC },
{ "orb", Eb, Ib, NOFUNC },
{ "adcb", Eb, Ib, NOFUNC },
{ "sbbb", Eb, Ib, NOFUNC },
{ "andb", Eb, Ib, NOFUNC },
{ "subb", Eb, Ib, NOFUNC },
{ "xorb", Eb, Ib, NOFUNC },
{ "cmpb", Eb, Ib, NOFUNC }
},
/* GRP1S */
{
{ "addS", Ev, Iv, NOFUNC },
{ "orS", Ev, Iv, NOFUNC },
{ "adcS", Ev, Iv, NOFUNC },
{ "sbbS", Ev, Iv, NOFUNC },
{ "andS", Ev, Iv, NOFUNC },
{ "subS", Ev, Iv, NOFUNC },
{ "xorS", Ev, Iv, NOFUNC },
{ "cmpS", Ev, Iv, NOFUNC }
},
/* GRP1Ss */
{
{ "addS", Ev, sIb, NOFUNC },
{ "orS", Ev, sIb, NOFUNC },
{ "adcS", Ev, sIb, NOFUNC },
{ "sbbS", Ev, sIb, NOFUNC },
{ "andS", Ev, sIb, NOFUNC },
{ "subS", Ev, sIb, NOFUNC },
{ "xorS", Ev, sIb, NOFUNC },
{ "cmpS", Ev, sIb, NOFUNC }
},
/* GRP2b */
{
{ "rolb", Eb, Ib, NOFUNC },
{ "rorb", Eb, Ib, NOFUNC },
{ "rclb", Eb, Ib, NOFUNC },
{ "rcrb", Eb, Ib, NOFUNC },
{ "shlb", Eb, Ib, NOFUNC },
{ "shrb", Eb, Ib, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "sarb", Eb, Ib, NOFUNC },
},
/* GRP2S */
{
{ "rolS", Ev, Ib, NOFUNC },
{ "rorS", Ev, Ib, NOFUNC },
{ "rclS", Ev, Ib, NOFUNC },
{ "rcrS", Ev, Ib, NOFUNC },
{ "shlS", Ev, Ib, NOFUNC },
{ "shrS", Ev, Ib, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "sarS", Ev, Ib, NOFUNC },
},
/* GRP2b_one */
{
{ "rolb", Eb, NOFUNC, NOFUNC },
{ "rorb", Eb, NOFUNC, NOFUNC },
{ "rclb", Eb, NOFUNC, NOFUNC },
{ "rcrb", Eb, NOFUNC, NOFUNC },
{ "shlb", Eb, NOFUNC, NOFUNC },
{ "shrb", Eb, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "sarb", Eb, NOFUNC, NOFUNC },
},
/* GRP2S_one */
{
{ "rolS", Ev, NOFUNC, NOFUNC },
{ "rorS", Ev, NOFUNC, NOFUNC },
{ "rclS", Ev, NOFUNC, NOFUNC },
{ "rcrS", Ev, NOFUNC, NOFUNC },
{ "shlS", Ev, NOFUNC, NOFUNC },
{ "shrS", Ev, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "sarS", Ev, NOFUNC, NOFUNC },
},
/* GRP2b_cl */
{
{ "rolb", Eb, CL, NOFUNC },
{ "rorb", Eb, CL, NOFUNC },
{ "rclb", Eb, CL, NOFUNC },
{ "rcrb", Eb, CL, NOFUNC },
{ "shlb", Eb, CL, NOFUNC },
{ "shrb", Eb, CL, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "sarb", Eb, CL, NOFUNC },
},
/* GRP2S_cl */
{
{ "rolS", Ev, CL, NOFUNC },
{ "rorS", Ev, CL, NOFUNC },
{ "rclS", Ev, CL, NOFUNC },
{ "rcrS", Ev, CL, NOFUNC },
{ "shlS", Ev, CL, NOFUNC },
{ "shrS", Ev, CL, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "sarS", Ev, CL, NOFUNC }
},
/* GRP3b */
{
{ "testb", Eb, Ib, NOFUNC },
{ "(bad)", Eb, NOFUNC, NOFUNC },
{ "notb", Eb, NOFUNC, NOFUNC },
{ "negb", Eb, NOFUNC, NOFUNC },
{ "mulb", AL, Eb, NOFUNC },
{ "imulb", AL, Eb, NOFUNC },
{ "divb", AL, Eb, NOFUNC },
{ "idivb", AL, Eb, NOFUNC }
},
/* GRP3S */
{
{ "testS", Ev, Iv, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "notS", Ev, NOFUNC, NOFUNC },
{ "negS", Ev, NOFUNC, NOFUNC },
{ "mulS", eAX, Ev, NOFUNC },
{ "imulS", eAX, Ev, NOFUNC },
{ "divS", eAX, Ev, NOFUNC },
{ "idivS", eAX, Ev, NOFUNC },
},
/* GRP4 */
{
{ "incb", Eb, NOFUNC, NOFUNC },
{ "decb", Eb, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
},
/* GRP5 */
{
{ "incS", Ev, NOFUNC, NOFUNC },
{ "decS", Ev, NOFUNC, NOFUNC },
{ "call", indirEv, NOFUNC, NOFUNC },
{ "lcall", indirEv, NOFUNC, NOFUNC },
{ "jmp", indirEv, NOFUNC, NOFUNC },
{ "ljmp", indirEv, NOFUNC, NOFUNC },
{ "pushS", Ev, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
},
/* GRP6 */
{
{ "sldt", Ew, NOFUNC, NOFUNC },
{ "str", Ew, NOFUNC, NOFUNC },
{ "lldt", Ew, NOFUNC, NOFUNC },
{ "ltr", Ew, NOFUNC, NOFUNC },
{ "verr", Ew, NOFUNC, NOFUNC },
{ "verw", Ew, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC }
},
/* GRP7 */
{
{ "sgdt", Ew, NOFUNC, NOFUNC },
{ "sidt", Ew, NOFUNC, NOFUNC },
{ "lgdt", Ew, NOFUNC, NOFUNC },
{ "lidt", Ew, NOFUNC, NOFUNC },
{ "smsw", Ew, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "lmsw", Ew, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
},
/* GRP8 */
{
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "btS", Ev, Ib, NOFUNC },
{ "btsS", Ev, Ib, NOFUNC },
{ "btrS", Ev, Ib, NOFUNC },
{ "btcS", Ev, Ib, NOFUNC },
}
};
#define PREFIX_REPZ 0x01
#define PREFIX_REPNZ 0x02
#define PREFIX_LOCK 0x04
#define PREFIX_CS 0x08
#define PREFIX_SS 0x10
#define PREFIX_DS 0x20
#define PREFIX_ES 0x40
#define PREFIX_FS 0x80
#define PREFIX_GS 0x100
#define PREFIX_DATA 0x200
#define PREFIX_ADR 0x400
#define PREFIX_FWAIT 0x800
static int prefixes;
static void
ckprefix(void)
{
prefixes = 0;
while (1)
{
switch (*codep)
{
case 0xf3:
prefixes |= PREFIX_REPZ;
break;
case 0xf2:
prefixes |= PREFIX_REPNZ;
break;
case 0xf0:
prefixes |= PREFIX_LOCK;
break;
case 0x2e:
prefixes |= PREFIX_CS;
break;
case 0x36:
prefixes |= PREFIX_SS;
break;
case 0x3e:
prefixes |= PREFIX_DS;
break;
case 0x26:
prefixes |= PREFIX_ES;
break;
case 0x64:
prefixes |= PREFIX_FS;
break;
case 0x65:
prefixes |= PREFIX_GS;
break;
case 0x66:
prefixes |= PREFIX_DATA;
break;
case 0x67:
prefixes |= PREFIX_ADR;
break;
case 0x9b:
prefixes |= PREFIX_FWAIT;
break;
default:
return;
}
codep++;
}
}
static int dflag;
static int aflag;
static char op1out[100], op2out[100], op3out[100];
static unsigned long start_pc;
/*
* disassemble the first instruction in 'inbuf'. You have to make
* sure all of the bytes of the instruction are filled in.
* On the 386's of 1988, the maximum length of an instruction is 15 bytes.
* (see topic "Redundant prefixes" in the "Differences from 8086"
* section of the "Virtual 8086 Mode" chapter.)
* 'pc' should be the address of this instruction, it will
* be used to print the target address if this is a relative jump or call
* 'outbuf' gets filled in with the disassembled instruction. it should
* be long enough to hold the longest disassembled instruction.
* 100 bytes is certainly enough, unless symbol printing is added later
* The function returns the length of this instruction in bytes.
*/
int
i386dis (unsigned short ucs, unsigned short uip, unsigned char *inbuf,
char *outbuf, int mode)
{
struct dis386 *dp;
int i;
int enter_instruction;
char *first, *second, *third;
int needcomma;
obuf[0] = 0;
op1out[0] = 0;
op2out[0] = 0;
op3out[0] = 0;
start_pc = ucs << 16 | uip;
start_codep = inbuf;
codep = inbuf;
ckprefix ();
if (*codep == 0xc8)
enter_instruction = 1;
else
enter_instruction = 0;
obufp = obuf;
if (prefixes & PREFIX_REPZ)
oappend ("repz ");
if (prefixes & PREFIX_REPNZ)
oappend ("repnz ");
if (prefixes & PREFIX_LOCK)
oappend ("lock ");
if ((prefixes & PREFIX_FWAIT)
&& ((*codep < 0xd8) || (*codep > 0xdf)))
{
/* fwait not followed by floating point instruction */
oappend ("fwait");
strcpy (outbuf, obuf);
return (1);
}
/* these would be initialized to 0 if disassembling for 8086 or 286 */
if (mode) {
dflag = 1;
aflag = 1;
} else {
dflag = 0;
aflag = 0;
}
if (prefixes & PREFIX_DATA)
dflag ^= 1;
if (prefixes & PREFIX_ADR)
{
aflag ^= 1;
oappend ("addr16 ");
}
if (*codep == 0x0f)
dp = &dis386_twobyte[*++codep];
else
dp = &dis386[*codep];
codep++;
mod = (*codep >> 6) & 3;
reg = (*codep >> 3) & 7;
rm = *codep & 7;
if (dp->name == NULL && dp->bytemode1 == FLOATCODE)
{
dofloat ();
}
else
{
if (dp->name == NULL)
dp = &grps[dp->bytemode1][reg];
putop (dp->name);
obufp = op1out;
if (dp->op1)
(*dp->op1)(dp->bytemode1);
obufp = op2out;
if (dp->op2)
(*dp->op2)(dp->bytemode2);
obufp = op3out;
if (dp->op3)
(*dp->op3)(dp->bytemode3);
}
obufp = obuf + strlen (obuf);
for (i = strlen (obuf); i < 6; i++)
oappend (" ");
oappend (" ");
/* enter instruction is printed with operands in the
* same order as the intel book; everything else
* is printed in reverse order
*/
if (enter_instruction)
{
first = op1out;
second = op2out;
third = op3out;
}
else
{
first = op3out;
second = op2out;
third = op1out;
}
needcomma = 0;
if (*first)
{
oappend (first);
needcomma = 1;
}
if (*second)
{
if (needcomma)
oappend (",");
oappend (second);
needcomma = 1;
}
if (*third)
{
if (needcomma)
oappend (",");
oappend (third);
}
strcpy (outbuf, obuf);
return (codep - inbuf);
}
const char *float_mem[] = {
/* d8 */
"fadds",
"fmuls",
"fcoms",
"fcomps",
"fsubs",
"fsubrs",
"fdivs",
"fdivrs",
/* d9 */
"flds",
"(bad)",
"fsts",
"fstps",
"fldenv",
"fldcw",
"fNstenv",
"fNstcw",
/* da */
"fiaddl",
"fimull",
"ficoml",
"ficompl",
"fisubl",
"fisubrl",
"fidivl",
"fidivrl",
/* db */
"fildl",
"(bad)",
"fistl",
"fistpl",
"(bad)",
"fldt",
"(bad)",
"fstpt",
/* dc */
"faddl",
"fmull",
"fcoml",
"fcompl",
"fsubl",
"fsubrl",
"fdivl",
"fdivrl",
/* dd */
"fldl",
"(bad)",
"fstl",
"fstpl",
"frstor",
"(bad)",
"fNsave",
"fNstsw",
/* de */
"fiadd",
"fimul",
"ficom",
"ficomp",
"fisub",
"fisubr",
"fidiv",
"fidivr",
/* df */
"fild",
"(bad)",
"fist",
"fistp",
"fbld",
"fildll",
"fbstp",
"fistpll",
};
#define ST OP_ST, 0
#define STi OP_STi, 0
#define FGRPd9_2 NULL, NULL, 0, NOFUNC, NOFUNC
#define FGRPd9_4 NULL, NULL, 1, NOFUNC, NOFUNC
#define FGRPd9_5 NULL, NULL, 2, NOFUNC, NOFUNC
#define FGRPd9_6 NULL, NULL, 3, NOFUNC, NOFUNC
#define FGRPd9_7 NULL, NULL, 4, NOFUNC, NOFUNC
#define FGRPda_5 NULL, NULL, 5, NOFUNC, NOFUNC
#define FGRPdb_4 NULL, NULL, 6, NOFUNC, NOFUNC
#define FGRPde_3 NULL, NULL, 7, NOFUNC, NOFUNC
#define FGRPdf_4 NULL, NULL, 8, NOFUNC, NOFUNC
struct dis386 float_reg[][8] = {
/* d8 */
{
{ "fadd", ST, STi, NOFUNC },
{ "fmul", ST, STi, NOFUNC },
{ "fcom", STi, NOFUNC, NOFUNC },
{ "fcomp", STi, NOFUNC, NOFUNC },
{ "fsub", ST, STi, NOFUNC },
{ "fsubr", ST, STi, NOFUNC },
{ "fdiv", ST, STi, NOFUNC },
{ "fdivr", ST, STi, NOFUNC },
},
/* d9 */
{
{ "fld", STi, NOFUNC, NOFUNC },
{ "fxch", STi, NOFUNC, NOFUNC },
{ FGRPd9_2 },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ FGRPd9_4 },
{ FGRPd9_5 },
{ FGRPd9_6 },
{ FGRPd9_7 },
},
/* da */
{
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ FGRPda_5 },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
},
/* db */
{
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ FGRPdb_4 },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
},
/* dc */
{
{ "fadd", STi, ST, NOFUNC },
{ "fmul", STi, ST, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "fsub", STi, ST, NOFUNC },
{ "fsubr", STi, ST, NOFUNC },
{ "fdiv", STi, ST, NOFUNC },
{ "fdivr", STi, ST, NOFUNC },
},
/* dd */
{
{ "ffree", STi, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "fst", STi, NOFUNC, NOFUNC },
{ "fstp", STi, NOFUNC, NOFUNC },
{ "fucom", STi, NOFUNC, NOFUNC },
{ "fucomp", STi, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
},
/* de */
{
{ "faddp", STi, ST, NOFUNC },
{ "fmulp", STi, ST, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ FGRPde_3 },
{ "fsubp", STi, ST, NOFUNC },
{ "fsubrp", STi, ST, NOFUNC },
{ "fdivp", STi, ST, NOFUNC },
{ "fdivrp", STi, ST, NOFUNC },
},
/* df */
{
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ FGRPdf_4 },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
{ "(bad)", NOFUNC, NOFUNC, NOFUNC },
},
};
const char *fgrps[][8] = {
/* d9_2 0 */
{
"fnop","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)",
},
/* d9_4 1 */
{
"fchs","fabs","(bad)","(bad)","ftst","fxam","(bad)","(bad)",
},
/* d9_5 2 */
{
"fld1","fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz","(bad)",
},
/* d9_6 3 */
{
"f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp","fincstp",
},
/* d9_7 4 */
{
"fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos",
},
/* da_5 5 */
{
"(bad)","fucompp","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)",
},
/* db_4 6 */
{
"feni(287 only)","fdisi(287 only)","fNclex","fNinit",
"fNsetpm(287 only)","(bad)","(bad)","(bad)",
},
/* de_3 7 */
{
"(bad)","fcompp","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)",
},
/* df_4 8 */
{
"fNstsw","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)",
},
};
static void
dofloat ()
{
struct dis386 *dp;
unsigned char floatop;
floatop = codep[-1];
if (mod != 3)
{
putop (float_mem[(floatop - 0xd8) * 8 + reg]);
obufp = op1out;
OP_E (v_mode);
return;
}
codep++;
dp = &float_reg[floatop - 0xd8][reg];
if (dp->name == NULL)
{
putop (fgrps[dp->bytemode1][rm]);
/* instruction fnstsw is only one with strange arg */
if (floatop == 0xdf && *codep == 0xe0)
strcpy (op1out, "%eax");
}
else
{
putop (dp->name);
obufp = op1out;
if (dp->op1)
(*dp->op1)(dp->bytemode1);
obufp = op2out;
if (dp->op2)
(*dp->op2)(dp->bytemode2);
}
}
static void
OP_ST(int dummy __unused)
{
oappend ("%st");
}
static void
OP_STi(int dummy __unused)
{
sprintf (scratchbuf, "%%st(%d)", rm);
oappend (scratchbuf);
}
/* capital letters in template are macros */
static void
putop(const char *template)
{
const char *p;
for (p = template; *p; p++)
{
switch (*p)
{
default:
*obufp++ = *p;
break;
case 'C': /* For jcxz/jecxz */
if (aflag == 0)
*obufp++ = 'e';
break;
case 'N':
if ((prefixes & PREFIX_FWAIT) == 0)
*obufp++ = 'n';
break;
case 'S':
/* operand size flag */
if (dflag)
*obufp++ = 'l';
else
*obufp++ = 'w';
break;
}
}
*obufp = 0;
}
static void
oappend(const char *s)
{
strcpy (obufp, s);
obufp += strlen (s);
*obufp = 0;
}
static void
append_prefix()
{
if (prefixes & PREFIX_CS)
oappend ("%cs:");
if (prefixes & PREFIX_DS)
oappend ("%ds:");
if (prefixes & PREFIX_SS)
oappend ("%ss:");
if (prefixes & PREFIX_ES)
oappend ("%es:");
if (prefixes & PREFIX_FS)
oappend ("%fs:");
if (prefixes & PREFIX_GS)
oappend ("%gs:");
}
static void
OP_indirE(int bytemode)
{
oappend ("*");
OP_E (bytemode);
}
static void
OP_E(int bytemode)
{
int disp;
int havesib;
int base;
int idx;
int scale;
int havebase;
/* skip mod/rm byte */
codep++;
havesib = 0;
havebase = 0;
disp = 0;
if (mod == 3) {
switch (bytemode) {
case b_mode:
oappend (names8[rm]);
break;
case w_mode:
oappend (names16[rm]);
break;
case v_mode:
if (dflag)
oappend (names32[rm]);
else
oappend (names16[rm]);
break;
default:
oappend ("<bad dis table>");
break;
}
return;
}
append_prefix ();
if (aflag && rm == 4) {
havesib = 1;
havebase = 1;
scale = (*codep >> 6) & 3;
idx = (*codep >> 3) & 7;
base = *codep & 7;
codep++;
}
switch (mod) {
case 0:
if (aflag) {
switch (rm) {
case 4:
/* implies havesib and havebase */
if (base == 5) {
havebase = 0;
disp = get32 ();
}
break;
case 5:
disp = get32 ();
break;
default:
havebase = 1;
base = rm;
break;
}
} else {
if (rm == 6) {
havebase = 0;
disp = get16 ();
} else {
havebase = 1;
base = rm;
}
}
break;
case 1:
disp = *(char *)codep++;
if (!aflag || rm != 4) {
havebase = 1;
base = rm;
}
break;
case 2:
if (aflag)
disp = get32 ();
else
disp = get16 ();
if (!aflag || rm != 4) {
havebase = 1;
base = rm;
}
break;
}
if (mod != 0 || ((aflag && rm == 5) || (havesib && base == 5))
|| (!aflag && rm == 6)) {
sprintf (scratchbuf, "0x%x", disp);
oappend (scratchbuf);
}
if (havebase || havesib) {
oappend ("(");
if (havebase)
oappend (aflag ? names32[base] : names16_pairs[base]);
if (havesib) {
if (idx != 4) {
sprintf (scratchbuf, ",%s", names32[idx]);
oappend (scratchbuf);
}
sprintf (scratchbuf, ",%d", 1 << scale);
oappend (scratchbuf);
}
oappend (")");
}
}
static void
OP_G(int bytemode)
{
switch (bytemode)
{
case b_mode:
oappend (names8[reg]);
break;
case w_mode:
oappend (names16[reg]);
break;
case d_mode:
oappend (names32[reg]);
break;
case v_mode:
if (dflag)
oappend (names32[reg]);
else
oappend (names16[reg]);
break;
default:
oappend ("<internal disassembler error>");
break;
}
}
static int
get32()
{
int x = 0;
x = *codep++ & 0xff;
x |= (*codep++ & 0xff) << 8;
x |= (*codep++ & 0xff) << 16;
x |= (*codep++ & 0xff) << 24;
return (x);
}
static int
get16()
{
int x = 0;
x = *codep++ & 0xff;
x |= (*codep++ & 0xff) << 8;
return (x);
}
static void
OP_REG(int code)
{
const char *s;
switch (code)
{
case indir_dx_reg: s = "(%dx)"; break;
case ax_reg: case cx_reg: case dx_reg: case bx_reg:
case sp_reg: case bp_reg: case si_reg: case di_reg:
s = names16[code - ax_reg];
break;
case es_reg: case ss_reg: case cs_reg:
case ds_reg: case fs_reg: case gs_reg:
s = names_seg[code - es_reg];
break;
case al_reg: case ah_reg: case cl_reg: case ch_reg:
case dl_reg: case dh_reg: case bl_reg: case bh_reg:
s = names8[code - al_reg];
break;
case eAX_reg: case eCX_reg: case eDX_reg: case eBX_reg:
case eSP_reg: case eBP_reg: case eSI_reg: case eDI_reg:
if (dflag)
s = names32[code - eAX_reg];
else
s = names16[code - eAX_reg];
break;
default:
s = "<internal disassembler error>";
break;
}
oappend (s);
}
static void
OP_I(int bytemode)
{
int op;
switch (bytemode)
{
case b_mode:
op = *codep++ & 0xff;
break;
case v_mode:
if (dflag)
op = get32 ();
else
op = get16 ();
break;
case w_mode:
op = get16 ();
break;
default:
oappend ("<internal disassembler error>");
return;
}
sprintf (scratchbuf, "$0x%x", op);
oappend (scratchbuf);
}
static void
OP_sI(int bytemode)
{
int op;
switch (bytemode)
{
case b_mode:
op = *(char *)codep++;
break;
case v_mode:
if (dflag)
op = get32 ();
else
op = (short)get16();
break;
case w_mode:
op = (short)get16 ();
break;
default:
oappend ("<internal disassembler error>");
return;
}
sprintf (scratchbuf, "$0x%x", op);
oappend (scratchbuf);
}
static void
OP_J(int bytemode)
{
int disp;
switch (bytemode)
{
case b_mode:
disp = *(char *)codep++;
append_pc(start_pc + codep - start_codep + disp);
break;
case v_mode:
if (dflag) {
disp = get32 ();
append_pc(start_pc + codep - start_codep + disp);
} else {
disp = (short)get16 ();
disp = (((start_pc + codep - start_codep) & 0xffff) + disp) & 0xffff;
append_pc((start_pc & 0xffff0000) | disp);
}
break;
default:
oappend ("<internal disassembelr error>");
return;
}
oappend (scratchbuf);
}
static void
append_pc(unsigned long pc)
{
sprintf(scratchbuf, "%04lx:%04lx", pc >> 16, pc & 0xffff);
}
static void
OP_SEG(int dummy __unused)
{
static const char *sreg[] = {
"%es","%cs","%ss","%ds","%fs","%gs","%?","%?",
};
oappend (sreg[reg]);
}
static void
OP_DIR(int size)
{
int seg, offset;
switch (size)
{
case lptr:
if (dflag)
{
offset = get32 ();
seg = get16 ();
}
else
{
offset = get16 ();
seg = get16 ();
}
sprintf (scratchbuf, "%04x:%04x", seg, offset);
oappend (scratchbuf);
break;
case v_mode:
if (aflag)
offset = get32 ();
else
offset = (short)get16 ();
append_pc(start_pc + codep - start_codep + offset);
oappend (scratchbuf);
break;
default:
oappend ("<internal disassembler error>");
break;
}
}
static void
OP_OFF(int dummy __unused)
{
int off;
if (aflag)
off = get32 ();
else
off = get16 ();
sprintf (scratchbuf, "0x%x", off);
oappend (scratchbuf);
}
static void
OP_ESDI(int dummy __unused)
{
oappend ("%es:(");
oappend (aflag ? "%edi" : "%di");
oappend (")");
}
static void
OP_DSSI(int dummy __unused)
{
oappend ("%ds:(");
oappend (aflag ? "%esi" : "%si");
oappend (")");
}
static void
OP_C(int dummy __unused)
{
codep++; /* skip mod/rm */
sprintf (scratchbuf, "%%cr%d", reg);
oappend (scratchbuf);
}
static void
OP_D(int dummy __unused)
{
codep++; /* skip mod/rm */
sprintf (scratchbuf, "%%db%d", reg);
oappend (scratchbuf);
}
static void
OP_T(int dummy __unused)
{
codep++; /* skip mod/rm */
sprintf (scratchbuf, "%%tr%d", reg);
oappend (scratchbuf);
}
static void
OP_rm(int bytemode)
{
switch (bytemode)
{
case d_mode:
oappend (names32[rm]);
break;
case w_mode:
oappend (names16[rm]);
break;
}
}
#else
i386dis (pc, inbuf, outbuf, mode)
int pc;
unsigned char *inbuf;
char *outbuf;
{
strcpy (outbuf, "(no disassembler)");
return (1);
}
#endif /* DISASSEMBLER */
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