1953 lines
37 KiB
C
1953 lines
37 KiB
C
/* Print i386 instructions for GDB, the GNU debugger.
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Copyright (C) 1988, 1989, 1991 Free Software Foundation, Inc.
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This file is part of GDB.
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This program 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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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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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., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/*
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* 80386 instruction printer by Pace Willisson (pace@prep.ai.mit.edu)
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* July 1988
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* modified by John Hassey (hassey@dg-rtp.dg.com)
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*/
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/*
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* The main tables describing the instructions is essentially a copy
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* of the "Opcode Map" chapter (Appendix A) of the Intel 80386
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* Programmers Manual. Usually, there is a capital letter, followed
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* by a small letter. The capital letter tell the addressing mode,
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* and the small letter tells about the operand size. Refer to
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* the Intel manual for details.
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*/
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#include "dis-asm.h"
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#define MAXLEN 20
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#include <setjmp.h>
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struct private
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{
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/* Points to first byte not fetched. */
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bfd_byte *max_fetched;
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bfd_byte the_buffer[MAXLEN];
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bfd_vma insn_start;
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jmp_buf bailout;
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};
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/* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive)
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to ADDR (exclusive) are valid. Returns 1 for success, longjmps
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on error. */
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#define FETCH_DATA(info, addr) \
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((addr) <= ((struct private *)(info->private_data))->max_fetched \
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? 1 : fetch_data ((info), (addr)))
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static int
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fetch_data (info, addr)
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struct disassemble_info *info;
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bfd_byte *addr;
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{
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int status;
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struct private *priv = (struct private *)info->private_data;
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bfd_vma start = priv->insn_start + (priv->max_fetched - priv->the_buffer);
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status = (*info->read_memory_func) (start,
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priv->max_fetched,
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addr - priv->max_fetched,
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info);
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if (status != 0)
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{
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(*info->memory_error_func) (status, start, info);
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longjmp (priv->bailout, 1);
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}
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else
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priv->max_fetched = addr;
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return 1;
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}
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#define Eb OP_E, b_mode
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#define indirEb OP_indirE, b_mode
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#define Gb OP_G, b_mode
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#define Ev OP_E, v_mode
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#define indirEv OP_indirE, v_mode
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#define Ew OP_E, w_mode
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#define Ma OP_E, v_mode
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#define M OP_E, 0
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#define Mp OP_E, 0 /* ? */
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#define Gv OP_G, v_mode
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#define Gw OP_G, w_mode
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#define Rw OP_rm, w_mode
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#define Rd OP_rm, d_mode
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#define Ib OP_I, b_mode
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#define sIb OP_sI, b_mode /* sign extened byte */
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#define Iv OP_I, v_mode
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#define Iw OP_I, w_mode
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#define Jb OP_J, b_mode
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#define Jv OP_J, v_mode
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#define ONE OP_ONE, 0
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#define Cd OP_C, d_mode
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#define Dd OP_D, d_mode
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#define Td OP_T, d_mode
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#define eAX OP_REG, eAX_reg
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#define eBX OP_REG, eBX_reg
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#define eCX OP_REG, eCX_reg
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#define eDX OP_REG, eDX_reg
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#define eSP OP_REG, eSP_reg
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#define eBP OP_REG, eBP_reg
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#define eSI OP_REG, eSI_reg
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#define eDI OP_REG, eDI_reg
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#define AL OP_REG, al_reg
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#define CL OP_REG, cl_reg
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#define DL OP_REG, dl_reg
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#define BL OP_REG, bl_reg
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#define AH OP_REG, ah_reg
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#define CH OP_REG, ch_reg
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#define DH OP_REG, dh_reg
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#define BH OP_REG, bh_reg
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#define AX OP_REG, ax_reg
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#define DX OP_REG, dx_reg
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#define indirDX OP_REG, indir_dx_reg
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#define Sw OP_SEG, w_mode
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#define Ap OP_DIR, lptr
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#define Av OP_DIR, v_mode
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#define Ob OP_OFF, b_mode
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#define Ov OP_OFF, v_mode
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#define Xb OP_DSSI, b_mode
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#define Xv OP_DSSI, v_mode
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#define Yb OP_ESDI, b_mode
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#define Yv OP_ESDI, v_mode
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#define es OP_REG, es_reg
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#define ss OP_REG, ss_reg
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#define cs OP_REG, cs_reg
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#define ds OP_REG, ds_reg
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#define fs OP_REG, fs_reg
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#define gs OP_REG, gs_reg
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int OP_E(), OP_indirE(), OP_G(), OP_I(), OP_sI(), OP_REG();
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int OP_J(), OP_SEG();
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int OP_DIR(), OP_OFF(), OP_DSSI(), OP_ESDI(), OP_ONE(), OP_C();
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int OP_D(), OP_T(), OP_rm();
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static void dofloat (), putop (), append_prefix (), set_op ();
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static int get16 (), get32 ();
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#define b_mode 1
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#define v_mode 2
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#define w_mode 3
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#define d_mode 4
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#define es_reg 100
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#define cs_reg 101
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#define ss_reg 102
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#define ds_reg 103
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#define fs_reg 104
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#define gs_reg 105
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#define eAX_reg 107
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#define eCX_reg 108
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#define eDX_reg 109
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#define eBX_reg 110
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#define eSP_reg 111
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#define eBP_reg 112
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#define eSI_reg 113
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#define eDI_reg 114
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#define lptr 115
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#define al_reg 116
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#define cl_reg 117
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#define dl_reg 118
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#define bl_reg 119
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#define ah_reg 120
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#define ch_reg 121
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#define dh_reg 122
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#define bh_reg 123
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#define ax_reg 124
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#define cx_reg 125
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#define dx_reg 126
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#define bx_reg 127
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#define sp_reg 128
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#define bp_reg 129
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#define si_reg 130
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#define di_reg 131
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#define indir_dx_reg 150
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#define GRP1b NULL, NULL, 0
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#define GRP1S NULL, NULL, 1
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#define GRP1Ss NULL, NULL, 2
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#define GRP2b NULL, NULL, 3
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#define GRP2S NULL, NULL, 4
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#define GRP2b_one NULL, NULL, 5
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#define GRP2S_one NULL, NULL, 6
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#define GRP2b_cl NULL, NULL, 7
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#define GRP2S_cl NULL, NULL, 8
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#define GRP3b NULL, NULL, 9
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#define GRP3S NULL, NULL, 10
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#define GRP4 NULL, NULL, 11
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#define GRP5 NULL, NULL, 12
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#define GRP6 NULL, NULL, 13
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#define GRP7 NULL, NULL, 14
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#define GRP8 NULL, NULL, 15
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#define FLOATCODE 50
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#define FLOAT NULL, NULL, FLOATCODE
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struct dis386 {
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char *name;
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int (*op1)();
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int bytemode1;
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int (*op2)();
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int bytemode2;
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int (*op3)();
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int bytemode3;
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};
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struct dis386 dis386[] = {
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/* 00 */
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{ "addb", Eb, Gb },
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{ "addS", Ev, Gv },
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{ "addb", Gb, Eb },
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{ "addS", Gv, Ev },
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{ "addb", AL, Ib },
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{ "addS", eAX, Iv },
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{ "pushl", es },
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{ "popl", es },
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/* 08 */
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{ "orb", Eb, Gb },
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{ "orS", Ev, Gv },
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{ "orb", Gb, Eb },
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{ "orS", Gv, Ev },
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{ "orb", AL, Ib },
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{ "orS", eAX, Iv },
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{ "pushl", cs },
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{ "(bad)" }, /* 0x0f extended opcode escape */
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/* 10 */
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{ "adcb", Eb, Gb },
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{ "adcS", Ev, Gv },
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{ "adcb", Gb, Eb },
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{ "adcS", Gv, Ev },
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{ "adcb", AL, Ib },
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{ "adcS", eAX, Iv },
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{ "pushl", ss },
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{ "popl", ss },
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/* 18 */
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{ "sbbb", Eb, Gb },
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{ "sbbS", Ev, Gv },
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{ "sbbb", Gb, Eb },
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{ "sbbS", Gv, Ev },
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{ "sbbb", AL, Ib },
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{ "sbbS", eAX, Iv },
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{ "pushl", ds },
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{ "popl", ds },
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/* 20 */
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{ "andb", Eb, Gb },
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{ "andS", Ev, Gv },
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{ "andb", Gb, Eb },
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{ "andS", Gv, Ev },
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{ "andb", AL, Ib },
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{ "andS", eAX, Iv },
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{ "(bad)" }, /* SEG ES prefix */
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{ "daa" },
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/* 28 */
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{ "subb", Eb, Gb },
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{ "subS", Ev, Gv },
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{ "subb", Gb, Eb },
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{ "subS", Gv, Ev },
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{ "subb", AL, Ib },
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{ "subS", eAX, Iv },
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{ "(bad)" }, /* SEG CS prefix */
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{ "das" },
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/* 30 */
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{ "xorb", Eb, Gb },
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{ "xorS", Ev, Gv },
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{ "xorb", Gb, Eb },
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{ "xorS", Gv, Ev },
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{ "xorb", AL, Ib },
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{ "xorS", eAX, Iv },
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{ "(bad)" }, /* SEG SS prefix */
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{ "aaa" },
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/* 38 */
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{ "cmpb", Eb, Gb },
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{ "cmpS", Ev, Gv },
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{ "cmpb", Gb, Eb },
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{ "cmpS", Gv, Ev },
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{ "cmpb", AL, Ib },
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{ "cmpS", eAX, Iv },
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{ "(bad)" }, /* SEG DS prefix */
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{ "aas" },
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/* 40 */
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{ "incS", eAX },
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{ "incS", eCX },
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{ "incS", eDX },
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{ "incS", eBX },
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{ "incS", eSP },
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{ "incS", eBP },
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{ "incS", eSI },
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{ "incS", eDI },
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/* 48 */
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{ "decS", eAX },
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{ "decS", eCX },
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{ "decS", eDX },
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{ "decS", eBX },
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{ "decS", eSP },
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{ "decS", eBP },
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{ "decS", eSI },
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{ "decS", eDI },
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/* 50 */
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{ "pushS", eAX },
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{ "pushS", eCX },
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{ "pushS", eDX },
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{ "pushS", eBX },
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{ "pushS", eSP },
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{ "pushS", eBP },
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{ "pushS", eSI },
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{ "pushS", eDI },
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/* 58 */
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{ "popS", eAX },
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{ "popS", eCX },
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{ "popS", eDX },
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{ "popS", eBX },
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{ "popS", eSP },
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{ "popS", eBP },
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{ "popS", eSI },
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{ "popS", eDI },
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/* 60 */
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{ "pusha" },
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{ "popa" },
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{ "boundS", Gv, Ma },
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{ "arpl", Ew, Gw },
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{ "(bad)" }, /* seg fs */
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{ "(bad)" }, /* seg gs */
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{ "(bad)" }, /* op size prefix */
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{ "(bad)" }, /* adr size prefix */
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/* 68 */
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{ "pushS", Iv }, /* 386 book wrong */
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{ "imulS", Gv, Ev, Iv },
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{ "pushl", sIb }, /* push of byte really pushes 4 bytes */
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{ "imulS", Gv, Ev, Ib },
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{ "insb", Yb, indirDX },
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{ "insS", Yv, indirDX },
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{ "outsb", indirDX, Xb },
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{ "outsS", indirDX, Xv },
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/* 70 */
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{ "jo", Jb },
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{ "jno", Jb },
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{ "jb", Jb },
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{ "jae", Jb },
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{ "je", Jb },
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{ "jne", Jb },
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{ "jbe", Jb },
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{ "ja", Jb },
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/* 78 */
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{ "js", Jb },
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{ "jns", Jb },
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{ "jp", Jb },
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{ "jnp", Jb },
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{ "jl", Jb },
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{ "jnl", Jb },
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{ "jle", Jb },
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{ "jg", Jb },
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/* 80 */
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{ GRP1b },
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{ GRP1S },
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{ "(bad)" },
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{ GRP1Ss },
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{ "testb", Eb, Gb },
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{ "testS", Ev, Gv },
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{ "xchgb", Eb, Gb },
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{ "xchgS", Ev, Gv },
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/* 88 */
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{ "movb", Eb, Gb },
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{ "movS", Ev, Gv },
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{ "movb", Gb, Eb },
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{ "movS", Gv, Ev },
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{ "movw", Ew, Sw },
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{ "leaS", Gv, M },
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{ "movw", Sw, Ew },
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{ "popS", Ev },
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/* 90 */
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{ "nop" },
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{ "xchgS", eCX, eAX },
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{ "xchgS", eDX, eAX },
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{ "xchgS", eBX, eAX },
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{ "xchgS", eSP, eAX },
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{ "xchgS", eBP, eAX },
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{ "xchgS", eSI, eAX },
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{ "xchgS", eDI, eAX },
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/* 98 */
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{ "cwtl" },
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{ "cltd" },
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{ "lcall", Ap },
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{ "(bad)" }, /* fwait */
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{ "pushf" },
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{ "popf" },
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{ "sahf" },
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{ "lahf" },
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/* a0 */
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{ "movb", AL, Ob },
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{ "movS", eAX, Ov },
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{ "movb", Ob, AL },
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{ "movS", Ov, eAX },
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{ "movsb", Yb, Xb },
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{ "movsS", Yv, Xv },
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{ "cmpsb", Yb, Xb },
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{ "cmpsS", Yv, Xv },
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/* a8 */
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{ "testb", AL, Ib },
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{ "testS", eAX, Iv },
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{ "stosb", Yb, AL },
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{ "stosS", Yv, eAX },
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{ "lodsb", AL, Xb },
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{ "lodsS", eAX, Xv },
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{ "scasb", AL, Xb },
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{ "scasS", eAX, Xv },
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/* b0 */
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{ "movb", AL, Ib },
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{ "movb", CL, Ib },
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{ "movb", DL, Ib },
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{ "movb", BL, Ib },
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{ "movb", AH, Ib },
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{ "movb", CH, Ib },
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{ "movb", DH, Ib },
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{ "movb", BH, Ib },
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/* b8 */
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{ "movS", eAX, Iv },
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{ "movS", eCX, Iv },
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{ "movS", eDX, Iv },
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{ "movS", eBX, Iv },
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{ "movS", eSP, Iv },
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{ "movS", eBP, Iv },
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{ "movS", eSI, Iv },
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{ "movS", eDI, Iv },
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/* c0 */
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{ GRP2b },
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{ GRP2S },
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{ "ret", Iw },
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{ "ret" },
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{ "lesS", Gv, Mp },
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{ "ldsS", Gv, Mp },
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{ "movb", Eb, Ib },
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{ "movS", Ev, Iv },
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/* c8 */
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{ "enter", Iw, Ib },
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{ "leave" },
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{ "lret", Iw },
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{ "lret" },
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{ "int3" },
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{ "int", Ib },
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{ "into" },
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{ "iret" },
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/* d0 */
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{ GRP2b_one },
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{ GRP2S_one },
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{ GRP2b_cl },
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{ GRP2S_cl },
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{ "aam", Ib },
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{ "aad", Ib },
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{ "(bad)" },
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{ "xlat" },
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/* d8 */
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{ FLOAT },
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{ FLOAT },
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{ FLOAT },
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{ FLOAT },
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{ FLOAT },
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{ FLOAT },
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{ FLOAT },
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{ FLOAT },
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/* e0 */
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{ "loopne", Jb },
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{ "loope", Jb },
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{ "loop", Jb },
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{ "jCcxz", Jb },
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{ "inb", AL, Ib },
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{ "inS", eAX, Ib },
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{ "outb", Ib, AL },
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{ "outS", Ib, eAX },
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/* e8 */
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{ "call", Av },
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{ "jmp", Jv },
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{ "ljmp", Ap },
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{ "jmp", Jb },
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{ "inb", AL, indirDX },
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{ "inS", eAX, indirDX },
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{ "outb", indirDX, AL },
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{ "outS", indirDX, eAX },
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/* f0 */
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{ "(bad)" }, /* lock prefix */
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{ "(bad)" },
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{ "(bad)" }, /* repne */
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{ "(bad)" }, /* repz */
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{ "hlt" },
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{ "cmc" },
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{ GRP3b },
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{ GRP3S },
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/* f8 */
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{ "clc" },
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{ "stc" },
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{ "cli" },
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{ "sti" },
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{ "cld" },
|
||
{ "std" },
|
||
{ GRP4 },
|
||
{ GRP5 },
|
||
};
|
||
|
||
struct dis386 dis386_twobyte[] = {
|
||
/* 00 */
|
||
{ GRP6 },
|
||
{ GRP7 },
|
||
{ "larS", Gv, Ew },
|
||
{ "lslS", Gv, Ew },
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
{ "clts" },
|
||
{ "(bad)" },
|
||
/* 08 */
|
||
{ "invd" },
|
||
{ "wbinvd" },
|
||
{ "(bad)" }, { "(bad)" },
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
/* 10 */
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
/* 18 */
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
/* 20 */
|
||
/* these are all backward in appendix A of the intel book */
|
||
{ "movl", Rd, Cd },
|
||
{ "movl", Rd, Dd },
|
||
{ "movl", Cd, Rd },
|
||
{ "movl", Dd, Rd },
|
||
{ "movl", Rd, Td },
|
||
{ "(bad)" },
|
||
{ "movl", Td, Rd },
|
||
{ "(bad)" },
|
||
/* 28 */
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
/* 30 */
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
/* 38 */
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
/* 40 */
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
/* 48 */
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
/* 50 */
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
/* 58 */
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
/* 60 */
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
/* 68 */
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
/* 70 */
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
/* 78 */
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
/* 80 */
|
||
{ "jo", Jv },
|
||
{ "jno", Jv },
|
||
{ "jb", Jv },
|
||
{ "jae", Jv },
|
||
{ "je", Jv },
|
||
{ "jne", Jv },
|
||
{ "jbe", Jv },
|
||
{ "ja", Jv },
|
||
/* 88 */
|
||
{ "js", Jv },
|
||
{ "jns", Jv },
|
||
{ "jp", Jv },
|
||
{ "jnp", Jv },
|
||
{ "jl", Jv },
|
||
{ "jge", Jv },
|
||
{ "jle", Jv },
|
||
{ "jg", Jv },
|
||
/* 90 */
|
||
{ "seto", Eb },
|
||
{ "setno", Eb },
|
||
{ "setb", Eb },
|
||
{ "setae", Eb },
|
||
{ "sete", Eb },
|
||
{ "setne", Eb },
|
||
{ "setbe", Eb },
|
||
{ "seta", Eb },
|
||
/* 98 */
|
||
{ "sets", Eb },
|
||
{ "setns", Eb },
|
||
{ "setp", Eb },
|
||
{ "setnp", Eb },
|
||
{ "setl", Eb },
|
||
{ "setge", Eb },
|
||
{ "setle", Eb },
|
||
{ "setg", Eb },
|
||
/* a0 */
|
||
{ "pushl", fs },
|
||
{ "popl", fs },
|
||
{ "(bad)" },
|
||
{ "btS", Ev, Gv },
|
||
{ "shldS", Ev, Gv, Ib },
|
||
{ "shldS", Ev, Gv, CL },
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
/* a8 */
|
||
{ "pushl", gs },
|
||
{ "popl", gs },
|
||
{ "(bad)" },
|
||
{ "btsS", Ev, Gv },
|
||
{ "shrdS", Ev, Gv, Ib },
|
||
{ "shrdS", Ev, Gv, CL },
|
||
{ "(bad)" },
|
||
{ "imulS", Gv, Ev },
|
||
/* b0 */
|
||
{ "cmpxchgb", Eb, Gb },
|
||
{ "cmpxchgS", Ev, Gv },
|
||
{ "lssS", Gv, Mp }, /* 386 lists only Mp */
|
||
{ "btrS", Ev, Gv },
|
||
{ "lfsS", Gv, Mp }, /* 386 lists only Mp */
|
||
{ "lgsS", Gv, Mp }, /* 386 lists only Mp */
|
||
{ "movzbS", Gv, Eb },
|
||
{ "movzwS", Gv, Ew },
|
||
/* b8 */
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
{ GRP8 },
|
||
{ "btcS", Ev, Gv },
|
||
{ "bsfS", Gv, Ev },
|
||
{ "bsrS", Gv, Ev },
|
||
{ "movsbS", Gv, Eb },
|
||
{ "movswS", Gv, Ew },
|
||
/* c0 */
|
||
{ "xaddb", Eb, Gb },
|
||
{ "xaddS", Ev, Gv },
|
||
{ "(bad)" }, { "(bad)" },
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
/* c8 */
|
||
{ "bswap", eAX },
|
||
{ "bswap", eCX },
|
||
{ "bswap", eDX },
|
||
{ "bswap", eBX },
|
||
{ "bswap", eSP },
|
||
{ "bswap", eBP },
|
||
{ "bswap", eSI },
|
||
{ "bswap", eDI },
|
||
/* d0 */
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
/* d8 */
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
/* e0 */
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
/* e8 */
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
/* f0 */
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
/* f8 */
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
{ "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" },
|
||
};
|
||
|
||
static char obuf[100];
|
||
static char *obufp;
|
||
static char scratchbuf[100];
|
||
static unsigned char *start_codep;
|
||
static unsigned char *codep;
|
||
static disassemble_info *the_info;
|
||
static int mod;
|
||
static int rm;
|
||
static int reg;
|
||
static void oappend ();
|
||
|
||
static char *names32[]={
|
||
"%eax","%ecx","%edx","%ebx", "%esp","%ebp","%esi","%edi",
|
||
};
|
||
static char *names16[] = {
|
||
"%ax","%cx","%dx","%bx","%sp","%bp","%si","%di",
|
||
};
|
||
static char *names8[] = {
|
||
"%al","%cl","%dl","%bl","%ah","%ch","%dh","%bh",
|
||
};
|
||
static char *names_seg[] = {
|
||
"%es","%cs","%ss","%ds","%fs","%gs","%?","%?",
|
||
};
|
||
|
||
struct dis386 grps[][8] = {
|
||
/* GRP1b */
|
||
{
|
||
{ "addb", Eb, Ib },
|
||
{ "orb", Eb, Ib },
|
||
{ "adcb", Eb, Ib },
|
||
{ "sbbb", Eb, Ib },
|
||
{ "andb", Eb, Ib },
|
||
{ "subb", Eb, Ib },
|
||
{ "xorb", Eb, Ib },
|
||
{ "cmpb", Eb, Ib }
|
||
},
|
||
/* GRP1S */
|
||
{
|
||
{ "addS", Ev, Iv },
|
||
{ "orS", Ev, Iv },
|
||
{ "adcS", Ev, Iv },
|
||
{ "sbbS", Ev, Iv },
|
||
{ "andS", Ev, Iv },
|
||
{ "subS", Ev, Iv },
|
||
{ "xorS", Ev, Iv },
|
||
{ "cmpS", Ev, Iv }
|
||
},
|
||
/* GRP1Ss */
|
||
{
|
||
{ "addS", Ev, sIb },
|
||
{ "orS", Ev, sIb },
|
||
{ "adcS", Ev, sIb },
|
||
{ "sbbS", Ev, sIb },
|
||
{ "andS", Ev, sIb },
|
||
{ "subS", Ev, sIb },
|
||
{ "xorS", Ev, sIb },
|
||
{ "cmpS", Ev, sIb }
|
||
},
|
||
/* GRP2b */
|
||
{
|
||
{ "rolb", Eb, Ib },
|
||
{ "rorb", Eb, Ib },
|
||
{ "rclb", Eb, Ib },
|
||
{ "rcrb", Eb, Ib },
|
||
{ "shlb", Eb, Ib },
|
||
{ "shrb", Eb, Ib },
|
||
{ "(bad)" },
|
||
{ "sarb", Eb, Ib },
|
||
},
|
||
/* GRP2S */
|
||
{
|
||
{ "rolS", Ev, Ib },
|
||
{ "rorS", Ev, Ib },
|
||
{ "rclS", Ev, Ib },
|
||
{ "rcrS", Ev, Ib },
|
||
{ "shlS", Ev, Ib },
|
||
{ "shrS", Ev, Ib },
|
||
{ "(bad)" },
|
||
{ "sarS", Ev, Ib },
|
||
},
|
||
/* GRP2b_one */
|
||
{
|
||
{ "rolb", Eb },
|
||
{ "rorb", Eb },
|
||
{ "rclb", Eb },
|
||
{ "rcrb", Eb },
|
||
{ "shlb", Eb },
|
||
{ "shrb", Eb },
|
||
{ "(bad)" },
|
||
{ "sarb", Eb },
|
||
},
|
||
/* GRP2S_one */
|
||
{
|
||
{ "rolS", Ev },
|
||
{ "rorS", Ev },
|
||
{ "rclS", Ev },
|
||
{ "rcrS", Ev },
|
||
{ "shlS", Ev },
|
||
{ "shrS", Ev },
|
||
{ "(bad)" },
|
||
{ "sarS", Ev },
|
||
},
|
||
/* GRP2b_cl */
|
||
{
|
||
{ "rolb", Eb, CL },
|
||
{ "rorb", Eb, CL },
|
||
{ "rclb", Eb, CL },
|
||
{ "rcrb", Eb, CL },
|
||
{ "shlb", Eb, CL },
|
||
{ "shrb", Eb, CL },
|
||
{ "(bad)" },
|
||
{ "sarb", Eb, CL },
|
||
},
|
||
/* GRP2S_cl */
|
||
{
|
||
{ "rolS", Ev, CL },
|
||
{ "rorS", Ev, CL },
|
||
{ "rclS", Ev, CL },
|
||
{ "rcrS", Ev, CL },
|
||
{ "shlS", Ev, CL },
|
||
{ "shrS", Ev, CL },
|
||
{ "(bad)" },
|
||
{ "sarS", Ev, CL }
|
||
},
|
||
/* GRP3b */
|
||
{
|
||
{ "testb", Eb, Ib },
|
||
{ "(bad)", Eb },
|
||
{ "notb", Eb },
|
||
{ "negb", Eb },
|
||
{ "mulb", AL, Eb },
|
||
{ "imulb", AL, Eb },
|
||
{ "divb", AL, Eb },
|
||
{ "idivb", AL, Eb }
|
||
},
|
||
/* GRP3S */
|
||
{
|
||
{ "testS", Ev, Iv },
|
||
{ "(bad)" },
|
||
{ "notS", Ev },
|
||
{ "negS", Ev },
|
||
{ "mulS", eAX, Ev },
|
||
{ "imulS", eAX, Ev },
|
||
{ "divS", eAX, Ev },
|
||
{ "idivS", eAX, Ev },
|
||
},
|
||
/* GRP4 */
|
||
{
|
||
{ "incb", Eb },
|
||
{ "decb", Eb },
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
},
|
||
/* GRP5 */
|
||
{
|
||
{ "incS", Ev },
|
||
{ "decS", Ev },
|
||
{ "call", indirEv },
|
||
{ "lcall", indirEv },
|
||
{ "jmp", indirEv },
|
||
{ "ljmp", indirEv },
|
||
{ "pushS", Ev },
|
||
{ "(bad)" },
|
||
},
|
||
/* GRP6 */
|
||
{
|
||
{ "sldt", Ew },
|
||
{ "str", Ew },
|
||
{ "lldt", Ew },
|
||
{ "ltr", Ew },
|
||
{ "verr", Ew },
|
||
{ "verw", Ew },
|
||
{ "(bad)" },
|
||
{ "(bad)" }
|
||
},
|
||
/* GRP7 */
|
||
{
|
||
{ "sgdt", Ew },
|
||
{ "sidt", Ew },
|
||
{ "lgdt", Ew },
|
||
{ "lidt", Ew },
|
||
{ "smsw", Ew },
|
||
{ "(bad)" },
|
||
{ "lmsw", Ew },
|
||
{ "invlpg", Ew },
|
||
},
|
||
/* GRP8 */
|
||
{
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
{ "btS", Ev, Ib },
|
||
{ "btsS", Ev, Ib },
|
||
{ "btrS", Ev, Ib },
|
||
{ "btcS", Ev, Ib },
|
||
}
|
||
};
|
||
|
||
#define PREFIX_REPZ 1
|
||
#define PREFIX_REPNZ 2
|
||
#define PREFIX_LOCK 4
|
||
#define PREFIX_CS 8
|
||
#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 ()
|
||
{
|
||
prefixes = 0;
|
||
while (1)
|
||
{
|
||
FETCH_DATA (the_info, codep + 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 int op_address[3], op_ad, op_index[3];
|
||
static int start_pc;
|
||
|
||
|
||
/*
|
||
* 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
|
||
* The function returns the length of this instruction in bytes.
|
||
*/
|
||
|
||
int
|
||
print_insn_i386 (pc, info)
|
||
bfd_vma pc;
|
||
disassemble_info *info;
|
||
{
|
||
struct dis386 *dp;
|
||
int i;
|
||
int enter_instruction;
|
||
char *first, *second, *third;
|
||
int needcomma;
|
||
|
||
struct private priv;
|
||
bfd_byte *inbuf = priv.the_buffer;
|
||
|
||
info->private_data = (PTR) &priv;
|
||
priv.max_fetched = priv.the_buffer;
|
||
priv.insn_start = pc;
|
||
if (setjmp (priv.bailout) != 0)
|
||
/* Error return. */
|
||
return -1;
|
||
|
||
obuf[0] = 0;
|
||
op1out[0] = 0;
|
||
op2out[0] = 0;
|
||
op3out[0] = 0;
|
||
|
||
op_index[0] = op_index[1] = op_index[2] = -1;
|
||
|
||
the_info = info;
|
||
start_pc = pc;
|
||
start_codep = inbuf;
|
||
codep = inbuf;
|
||
|
||
ckprefix ();
|
||
|
||
FETCH_DATA (info, codep + 1);
|
||
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 */
|
||
(*info->fprintf_func) (info->stream, "fwait");
|
||
return (1);
|
||
}
|
||
|
||
/* these would be initialized to 0 if disassembling for 8086 or 286 */
|
||
dflag = 1;
|
||
aflag = 1;
|
||
|
||
if (prefixes & PREFIX_DATA)
|
||
dflag ^= 1;
|
||
|
||
if (prefixes & PREFIX_ADR)
|
||
{
|
||
aflag ^= 1;
|
||
oappend ("addr16 ");
|
||
}
|
||
|
||
if (*codep == 0x0f)
|
||
{
|
||
FETCH_DATA (info, codep + 2);
|
||
dp = &dis386_twobyte[*++codep];
|
||
}
|
||
else
|
||
dp = &dis386[*codep];
|
||
codep++;
|
||
FETCH_DATA (info, codep + 1);
|
||
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;
|
||
op_ad = 2;
|
||
if (dp->op1)
|
||
(*dp->op1)(dp->bytemode1);
|
||
|
||
obufp = op2out;
|
||
op_ad = 1;
|
||
if (dp->op2)
|
||
(*dp->op2)(dp->bytemode2);
|
||
|
||
obufp = op3out;
|
||
op_ad = 0;
|
||
if (dp->op3)
|
||
(*dp->op3)(dp->bytemode3);
|
||
}
|
||
|
||
obufp = obuf + strlen (obuf);
|
||
for (i = strlen (obuf); i < 6; i++)
|
||
oappend (" ");
|
||
oappend (" ");
|
||
(*info->fprintf_func) (info->stream, "%s", obuf);
|
||
|
||
/* 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;
|
||
op_ad = op_index[0];
|
||
op_index[0] = op_index[2];
|
||
op_index[2] = op_ad;
|
||
}
|
||
else
|
||
{
|
||
first = op3out;
|
||
second = op2out;
|
||
third = op1out;
|
||
}
|
||
needcomma = 0;
|
||
if (*first)
|
||
{
|
||
if (op_index[0] != -1)
|
||
print_address (op_address[op_index[0]], info->stream);
|
||
else
|
||
(*info->fprintf_func) (info->stream, "%s", first);
|
||
needcomma = 1;
|
||
}
|
||
if (*second)
|
||
{
|
||
if (needcomma)
|
||
(*info->fprintf_func) (info->stream, ",");
|
||
if (op_index[1] != -1)
|
||
print_address (op_address[op_index[1]], info->stream);
|
||
else
|
||
(*info->fprintf_func) (info->stream, "%s", second);
|
||
needcomma = 1;
|
||
}
|
||
if (*third)
|
||
{
|
||
if (needcomma)
|
||
(*info->fprintf_func) (info->stream, ",");
|
||
if (op_index[2] != -1)
|
||
print_address (op_address[op_index[2]], info->stream);
|
||
else
|
||
(*info->fprintf_func) (info->stream, "%s", third);
|
||
}
|
||
return (codep - inbuf);
|
||
}
|
||
|
||
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
|
||
int OP_ST(), OP_STi();
|
||
|
||
#define FGRPd9_2 NULL, NULL, 0
|
||
#define FGRPd9_4 NULL, NULL, 1
|
||
#define FGRPd9_5 NULL, NULL, 2
|
||
#define FGRPd9_6 NULL, NULL, 3
|
||
#define FGRPd9_7 NULL, NULL, 4
|
||
#define FGRPda_5 NULL, NULL, 5
|
||
#define FGRPdb_4 NULL, NULL, 6
|
||
#define FGRPde_3 NULL, NULL, 7
|
||
#define FGRPdf_4 NULL, NULL, 8
|
||
|
||
struct dis386 float_reg[][8] = {
|
||
/* d8 */
|
||
{
|
||
{ "fadd", ST, STi },
|
||
{ "fmul", ST, STi },
|
||
{ "fcom", STi },
|
||
{ "fcomp", STi },
|
||
{ "fsub", ST, STi },
|
||
{ "fsubr", ST, STi },
|
||
{ "fdiv", ST, STi },
|
||
{ "fdivr", ST, STi },
|
||
},
|
||
/* d9 */
|
||
{
|
||
{ "fld", STi },
|
||
{ "fxch", STi },
|
||
{ FGRPd9_2 },
|
||
{ "(bad)" },
|
||
{ FGRPd9_4 },
|
||
{ FGRPd9_5 },
|
||
{ FGRPd9_6 },
|
||
{ FGRPd9_7 },
|
||
},
|
||
/* da */
|
||
{
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
{ FGRPda_5 },
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
},
|
||
/* db */
|
||
{
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
{ FGRPdb_4 },
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
},
|
||
/* dc */
|
||
{
|
||
{ "fadd", STi, ST },
|
||
{ "fmul", STi, ST },
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
{ "fsub", STi, ST },
|
||
{ "fsubr", STi, ST },
|
||
{ "fdiv", STi, ST },
|
||
{ "fdivr", STi, ST },
|
||
},
|
||
/* dd */
|
||
{
|
||
{ "ffree", STi },
|
||
{ "(bad)" },
|
||
{ "fst", STi },
|
||
{ "fstp", STi },
|
||
{ "fucom", STi },
|
||
{ "fucomp", STi },
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
},
|
||
/* de */
|
||
{
|
||
{ "faddp", STi, ST },
|
||
{ "fmulp", STi, ST },
|
||
{ "(bad)" },
|
||
{ FGRPde_3 },
|
||
{ "fsubp", STi, ST },
|
||
{ "fsubrp", STi, ST },
|
||
{ "fdivp", STi, ST },
|
||
{ "fdivrp", STi, ST },
|
||
},
|
||
/* df */
|
||
{
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
{ FGRPdf_4 },
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
{ "(bad)" },
|
||
},
|
||
};
|
||
|
||
|
||
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
|
||
&& FETCH_DATA (the_info, codep + 1)
|
||
&& *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);
|
||
}
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
OP_ST (ignore)
|
||
int ignore;
|
||
{
|
||
oappend ("%st");
|
||
return (0);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
OP_STi (ignore)
|
||
int ignore;
|
||
{
|
||
sprintf (scratchbuf, "%%st(%d)", rm);
|
||
oappend (scratchbuf);
|
||
return (0);
|
||
}
|
||
|
||
|
||
/* capital letters in template are macros */
|
||
static void
|
||
putop (template)
|
||
char *template;
|
||
{
|
||
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 (s)
|
||
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:");
|
||
}
|
||
|
||
int
|
||
OP_indirE (bytemode)
|
||
int bytemode;
|
||
{
|
||
oappend ("*");
|
||
OP_E (bytemode);
|
||
return (0);
|
||
}
|
||
|
||
int
|
||
OP_E (bytemode)
|
||
int bytemode;
|
||
{
|
||
int disp;
|
||
int havesib;
|
||
int base;
|
||
int index;
|
||
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 (0);
|
||
}
|
||
|
||
append_prefix ();
|
||
if (rm == 4)
|
||
{
|
||
havesib = 1;
|
||
havebase = 1;
|
||
FETCH_DATA (the_info, codep + 1);
|
||
scale = (*codep >> 6) & 3;
|
||
index = (*codep >> 3) & 7;
|
||
base = *codep & 7;
|
||
codep++;
|
||
}
|
||
|
||
switch (mod)
|
||
{
|
||
case 0:
|
||
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;
|
||
}
|
||
break;
|
||
case 1:
|
||
FETCH_DATA (the_info, codep + 1);
|
||
disp = *(char *)codep++;
|
||
if (rm != 4)
|
||
{
|
||
havebase = 1;
|
||
base = rm;
|
||
}
|
||
break;
|
||
case 2:
|
||
disp = get32 ();
|
||
if (rm != 4)
|
||
{
|
||
havebase = 1;
|
||
base = rm;
|
||
}
|
||
break;
|
||
}
|
||
|
||
if (mod != 0 || rm == 5 || (havesib && base == 5))
|
||
{
|
||
sprintf (scratchbuf, "0x%x", disp);
|
||
oappend (scratchbuf);
|
||
}
|
||
|
||
if (havebase || havesib)
|
||
{
|
||
oappend ("(");
|
||
if (havebase)
|
||
oappend (names32[base]);
|
||
if (havesib)
|
||
{
|
||
if (index != 4)
|
||
{
|
||
sprintf (scratchbuf, ",%s", names32[index]);
|
||
oappend (scratchbuf);
|
||
}
|
||
sprintf (scratchbuf, ",%d", 1 << scale);
|
||
oappend (scratchbuf);
|
||
}
|
||
oappend (")");
|
||
}
|
||
return (0);
|
||
}
|
||
|
||
int
|
||
OP_G (bytemode)
|
||
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;
|
||
}
|
||
return (0);
|
||
}
|
||
|
||
static int
|
||
get32 ()
|
||
{
|
||
int x = 0;
|
||
|
||
FETCH_DATA (the_info, codep + 4);
|
||
x = *codep++ & 0xff;
|
||
x |= (*codep++ & 0xff) << 8;
|
||
x |= (*codep++ & 0xff) << 16;
|
||
x |= (*codep++ & 0xff) << 24;
|
||
return (x);
|
||
}
|
||
|
||
static int
|
||
get16 ()
|
||
{
|
||
int x = 0;
|
||
|
||
FETCH_DATA (the_info, codep + 2);
|
||
x = *codep++ & 0xff;
|
||
x |= (*codep++ & 0xff) << 8;
|
||
return (x);
|
||
}
|
||
|
||
static void
|
||
set_op (op)
|
||
int op;
|
||
{
|
||
op_index[op_ad] = op_ad;
|
||
op_address[op_ad] = op;
|
||
}
|
||
|
||
int
|
||
OP_REG (code)
|
||
int code;
|
||
{
|
||
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);
|
||
return (0);
|
||
}
|
||
|
||
int
|
||
OP_I (bytemode)
|
||
int bytemode;
|
||
{
|
||
int op;
|
||
|
||
switch (bytemode)
|
||
{
|
||
case b_mode:
|
||
FETCH_DATA (the_info, codep + 1);
|
||
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 (0);
|
||
}
|
||
sprintf (scratchbuf, "$0x%x", op);
|
||
oappend (scratchbuf);
|
||
return (0);
|
||
}
|
||
|
||
int
|
||
OP_sI (bytemode)
|
||
int bytemode;
|
||
{
|
||
int op;
|
||
|
||
switch (bytemode)
|
||
{
|
||
case b_mode:
|
||
FETCH_DATA (the_info, codep + 1);
|
||
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 (0);
|
||
}
|
||
sprintf (scratchbuf, "$0x%x", op);
|
||
oappend (scratchbuf);
|
||
return (0);
|
||
}
|
||
|
||
int
|
||
OP_J (bytemode)
|
||
int bytemode;
|
||
{
|
||
int disp;
|
||
int mask = -1;
|
||
|
||
switch (bytemode)
|
||
{
|
||
case b_mode:
|
||
FETCH_DATA (the_info, codep + 1);
|
||
disp = *(char *)codep++;
|
||
break;
|
||
case v_mode:
|
||
if (dflag)
|
||
disp = get32 ();
|
||
else
|
||
{
|
||
disp = (short)get16 ();
|
||
/* for some reason, a data16 prefix on a jump instruction
|
||
means that the pc is masked to 16 bits after the
|
||
displacement is added! */
|
||
mask = 0xffff;
|
||
}
|
||
break;
|
||
default:
|
||
oappend ("<internal disassembler error>");
|
||
return (0);
|
||
}
|
||
disp = (start_pc + codep - start_codep + disp) & mask;
|
||
set_op (disp);
|
||
sprintf (scratchbuf, "0x%x", disp);
|
||
oappend (scratchbuf);
|
||
return (0);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
OP_SEG (dummy)
|
||
int dummy;
|
||
{
|
||
static char *sreg[] = {
|
||
"%es","%cs","%ss","%ds","%fs","%gs","%?","%?",
|
||
};
|
||
|
||
oappend (sreg[reg]);
|
||
return (0);
|
||
}
|
||
|
||
int
|
||
OP_DIR (size)
|
||
int size;
|
||
{
|
||
int seg, offset;
|
||
|
||
switch (size)
|
||
{
|
||
case lptr:
|
||
if (aflag)
|
||
{
|
||
offset = get32 ();
|
||
seg = get16 ();
|
||
}
|
||
else
|
||
{
|
||
offset = get16 ();
|
||
seg = get16 ();
|
||
}
|
||
sprintf (scratchbuf, "0x%x,0x%x", seg, offset);
|
||
oappend (scratchbuf);
|
||
break;
|
||
case v_mode:
|
||
if (aflag)
|
||
offset = get32 ();
|
||
else
|
||
offset = (short)get16 ();
|
||
|
||
offset = start_pc + codep - start_codep + offset;
|
||
set_op (offset);
|
||
sprintf (scratchbuf, "0x%x", offset);
|
||
oappend (scratchbuf);
|
||
break;
|
||
default:
|
||
oappend ("<internal disassembler error>");
|
||
break;
|
||
}
|
||
return (0);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
OP_OFF (bytemode)
|
||
int bytemode;
|
||
{
|
||
int off;
|
||
|
||
if (aflag)
|
||
off = get32 ();
|
||
else
|
||
off = get16 ();
|
||
|
||
sprintf (scratchbuf, "0x%x", off);
|
||
oappend (scratchbuf);
|
||
return (0);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
OP_ESDI (dummy)
|
||
int dummy;
|
||
{
|
||
oappend ("%es:(");
|
||
oappend (aflag ? "%edi" : "%di");
|
||
oappend (")");
|
||
return (0);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
OP_DSSI (dummy)
|
||
int dummy;
|
||
{
|
||
oappend ("%ds:(");
|
||
oappend (aflag ? "%esi" : "%si");
|
||
oappend (")");
|
||
return (0);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
OP_ONE (dummy)
|
||
int dummy;
|
||
{
|
||
oappend ("1");
|
||
return (0);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
OP_C (dummy)
|
||
int dummy;
|
||
{
|
||
codep++; /* skip mod/rm */
|
||
sprintf (scratchbuf, "%%cr%d", reg);
|
||
oappend (scratchbuf);
|
||
return (0);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
OP_D (dummy)
|
||
int dummy;
|
||
{
|
||
codep++; /* skip mod/rm */
|
||
sprintf (scratchbuf, "%%db%d", reg);
|
||
oappend (scratchbuf);
|
||
return (0);
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
OP_T (dummy)
|
||
int dummy;
|
||
{
|
||
codep++; /* skip mod/rm */
|
||
sprintf (scratchbuf, "%%tr%d", reg);
|
||
oappend (scratchbuf);
|
||
return (0);
|
||
}
|
||
|
||
int
|
||
OP_rm (bytemode)
|
||
int bytemode;
|
||
{
|
||
switch (bytemode)
|
||
{
|
||
case d_mode:
|
||
oappend (names32[rm]);
|
||
break;
|
||
case w_mode:
|
||
oappend (names16[rm]);
|
||
break;
|
||
}
|
||
return (0);
|
||
}
|