Commit | Line | Data |
---|---|---|
5d0734a7 | 1 | /* Print i386 instructions for GDB, the GNU debugger. |
41b96d55 ILT |
2 | Copyright (C) 1988, 89, 91, 93, 94, 95, 96, 1997 |
3 | Free Software Foundation, Inc. | |
5d0734a7 JK |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
726257a8 | 19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
5d0734a7 JK |
20 | |
21 | /* | |
22 | * 80386 instruction printer by Pace Willisson (pace@prep.ai.mit.edu) | |
23 | * July 1988 | |
24 | * modified by John Hassey (hassey@dg-rtp.dg.com) | |
25 | */ | |
26 | ||
27 | /* | |
28 | * The main tables describing the instructions is essentially a copy | |
29 | * of the "Opcode Map" chapter (Appendix A) of the Intel 80386 | |
30 | * Programmers Manual. Usually, there is a capital letter, followed | |
31 | * by a small letter. The capital letter tell the addressing mode, | |
32 | * and the small letter tells about the operand size. Refer to | |
33 | * the Intel manual for details. | |
34 | */ | |
35 | ||
36 | #include "dis-asm.h" | |
726257a8 | 37 | #include "sysdep.h" |
5d0734a7 JK |
38 | |
39 | #define MAXLEN 20 | |
40 | ||
41 | #include <setjmp.h> | |
42 | ||
41b96d55 ILT |
43 | static int fetch_data PARAMS ((struct disassemble_info *, bfd_byte *)); |
44 | ||
726257a8 | 45 | struct dis_private |
5d0734a7 JK |
46 | { |
47 | /* Points to first byte not fetched. */ | |
48 | bfd_byte *max_fetched; | |
49 | bfd_byte the_buffer[MAXLEN]; | |
50 | bfd_vma insn_start; | |
51 | jmp_buf bailout; | |
52 | }; | |
53 | ||
54 | /* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive) | |
55 | to ADDR (exclusive) are valid. Returns 1 for success, longjmps | |
56 | on error. */ | |
57 | #define FETCH_DATA(info, addr) \ | |
726257a8 | 58 | ((addr) <= ((struct dis_private *)(info->private_data))->max_fetched \ |
5d0734a7 JK |
59 | ? 1 : fetch_data ((info), (addr))) |
60 | ||
61 | static int | |
62 | fetch_data (info, addr) | |
63 | struct disassemble_info *info; | |
64 | bfd_byte *addr; | |
65 | { | |
66 | int status; | |
726257a8 | 67 | struct dis_private *priv = (struct dis_private *)info->private_data; |
5d0734a7 JK |
68 | bfd_vma start = priv->insn_start + (priv->max_fetched - priv->the_buffer); |
69 | ||
70 | status = (*info->read_memory_func) (start, | |
71 | priv->max_fetched, | |
72 | addr - priv->max_fetched, | |
73 | info); | |
74 | if (status != 0) | |
75 | { | |
76 | (*info->memory_error_func) (status, start, info); | |
05545edc | 77 | longjmp (priv->bailout, 1); |
5d0734a7 JK |
78 | } |
79 | else | |
80 | priv->max_fetched = addr; | |
81 | return 1; | |
82 | } | |
83 | ||
84 | #define Eb OP_E, b_mode | |
85 | #define indirEb OP_indirE, b_mode | |
86 | #define Gb OP_G, b_mode | |
87 | #define Ev OP_E, v_mode | |
88 | #define indirEv OP_indirE, v_mode | |
89 | #define Ew OP_E, w_mode | |
90 | #define Ma OP_E, v_mode | |
91 | #define M OP_E, 0 | |
92 | #define Mp OP_E, 0 /* ? */ | |
93 | #define Gv OP_G, v_mode | |
94 | #define Gw OP_G, w_mode | |
95 | #define Rw OP_rm, w_mode | |
96 | #define Rd OP_rm, d_mode | |
97 | #define Ib OP_I, b_mode | |
98 | #define sIb OP_sI, b_mode /* sign extened byte */ | |
99 | #define Iv OP_I, v_mode | |
100 | #define Iw OP_I, w_mode | |
101 | #define Jb OP_J, b_mode | |
102 | #define Jv OP_J, v_mode | |
41b96d55 | 103 | #if 0 |
5d0734a7 | 104 | #define ONE OP_ONE, 0 |
41b96d55 | 105 | #endif |
5d0734a7 JK |
106 | #define Cd OP_C, d_mode |
107 | #define Dd OP_D, d_mode | |
108 | #define Td OP_T, d_mode | |
109 | ||
110 | #define eAX OP_REG, eAX_reg | |
111 | #define eBX OP_REG, eBX_reg | |
112 | #define eCX OP_REG, eCX_reg | |
113 | #define eDX OP_REG, eDX_reg | |
114 | #define eSP OP_REG, eSP_reg | |
115 | #define eBP OP_REG, eBP_reg | |
116 | #define eSI OP_REG, eSI_reg | |
117 | #define eDI OP_REG, eDI_reg | |
118 | #define AL OP_REG, al_reg | |
119 | #define CL OP_REG, cl_reg | |
120 | #define DL OP_REG, dl_reg | |
121 | #define BL OP_REG, bl_reg | |
122 | #define AH OP_REG, ah_reg | |
123 | #define CH OP_REG, ch_reg | |
124 | #define DH OP_REG, dh_reg | |
125 | #define BH OP_REG, bh_reg | |
126 | #define AX OP_REG, ax_reg | |
127 | #define DX OP_REG, dx_reg | |
128 | #define indirDX OP_REG, indir_dx_reg | |
129 | ||
130 | #define Sw OP_SEG, w_mode | |
131 | #define Ap OP_DIR, lptr | |
132 | #define Av OP_DIR, v_mode | |
133 | #define Ob OP_OFF, b_mode | |
134 | #define Ov OP_OFF, v_mode | |
135 | #define Xb OP_DSSI, b_mode | |
136 | #define Xv OP_DSSI, v_mode | |
137 | #define Yb OP_ESDI, b_mode | |
138 | #define Yv OP_ESDI, v_mode | |
139 | ||
140 | #define es OP_REG, es_reg | |
141 | #define ss OP_REG, ss_reg | |
142 | #define cs OP_REG, cs_reg | |
143 | #define ds OP_REG, ds_reg | |
144 | #define fs OP_REG, fs_reg | |
145 | #define gs OP_REG, gs_reg | |
146 | ||
41b96d55 ILT |
147 | typedef int (*op_rtn) PARAMS ((int bytemode, int aflag, int dflag)); |
148 | ||
149 | static int OP_E PARAMS ((int, int, int)); | |
150 | static int OP_G PARAMS ((int, int, int)); | |
151 | static int OP_I PARAMS ((int, int, int)); | |
152 | static int OP_indirE PARAMS ((int, int, int)); | |
153 | static int OP_sI PARAMS ((int, int, int)); | |
154 | static int OP_REG PARAMS ((int, int, int)); | |
155 | static int OP_J PARAMS ((int, int, int)); | |
156 | static int OP_DIR PARAMS ((int, int, int)); | |
157 | static int OP_OFF PARAMS ((int, int, int)); | |
158 | static int OP_ESDI PARAMS ((int, int, int)); | |
159 | static int OP_DSSI PARAMS ((int, int, int)); | |
160 | static int OP_SEG PARAMS ((int, int, int)); | |
161 | static int OP_C PARAMS ((int, int, int)); | |
162 | static int OP_D PARAMS ((int, int, int)); | |
163 | static int OP_T PARAMS ((int, int, int)); | |
164 | static int OP_rm PARAMS ((int, int, int)); | |
165 | static int OP_ST PARAMS ((int, int, int)); | |
166 | static int OP_STi PARAMS ((int, int, int)); | |
167 | #if 0 | |
168 | static int OP_ONE PARAMS ((int, int, int)); | |
169 | #endif | |
be0c8b05 SG |
170 | |
171 | static void append_prefix PARAMS ((void)); | |
172 | static void set_op PARAMS ((int op)); | |
173 | static void putop PARAMS ((char *template, int aflag, int dflag)); | |
174 | static void dofloat PARAMS ((int aflag, int dflag)); | |
175 | static int get16 PARAMS ((void)); | |
176 | static int get32 PARAMS ((void)); | |
177 | static void ckprefix PARAMS ((void)); | |
5d0734a7 JK |
178 | |
179 | #define b_mode 1 | |
180 | #define v_mode 2 | |
181 | #define w_mode 3 | |
182 | #define d_mode 4 | |
183 | ||
184 | #define es_reg 100 | |
185 | #define cs_reg 101 | |
186 | #define ss_reg 102 | |
187 | #define ds_reg 103 | |
188 | #define fs_reg 104 | |
189 | #define gs_reg 105 | |
190 | #define eAX_reg 107 | |
191 | #define eCX_reg 108 | |
192 | #define eDX_reg 109 | |
193 | #define eBX_reg 110 | |
194 | #define eSP_reg 111 | |
195 | #define eBP_reg 112 | |
196 | #define eSI_reg 113 | |
197 | #define eDI_reg 114 | |
198 | ||
199 | #define lptr 115 | |
200 | ||
201 | #define al_reg 116 | |
202 | #define cl_reg 117 | |
203 | #define dl_reg 118 | |
204 | #define bl_reg 119 | |
205 | #define ah_reg 120 | |
206 | #define ch_reg 121 | |
207 | #define dh_reg 122 | |
208 | #define bh_reg 123 | |
209 | ||
210 | #define ax_reg 124 | |
211 | #define cx_reg 125 | |
212 | #define dx_reg 126 | |
213 | #define bx_reg 127 | |
214 | #define sp_reg 128 | |
215 | #define bp_reg 129 | |
216 | #define si_reg 130 | |
217 | #define di_reg 131 | |
218 | ||
219 | #define indir_dx_reg 150 | |
220 | ||
221 | #define GRP1b NULL, NULL, 0 | |
222 | #define GRP1S NULL, NULL, 1 | |
223 | #define GRP1Ss NULL, NULL, 2 | |
224 | #define GRP2b NULL, NULL, 3 | |
225 | #define GRP2S NULL, NULL, 4 | |
226 | #define GRP2b_one NULL, NULL, 5 | |
227 | #define GRP2S_one NULL, NULL, 6 | |
228 | #define GRP2b_cl NULL, NULL, 7 | |
229 | #define GRP2S_cl NULL, NULL, 8 | |
230 | #define GRP3b NULL, NULL, 9 | |
231 | #define GRP3S NULL, NULL, 10 | |
232 | #define GRP4 NULL, NULL, 11 | |
233 | #define GRP5 NULL, NULL, 12 | |
234 | #define GRP6 NULL, NULL, 13 | |
235 | #define GRP7 NULL, NULL, 14 | |
236 | #define GRP8 NULL, NULL, 15 | |
726257a8 | 237 | #define GRP9 NULL, NULL, 16 |
5d0734a7 JK |
238 | |
239 | #define FLOATCODE 50 | |
240 | #define FLOAT NULL, NULL, FLOATCODE | |
241 | ||
242 | struct dis386 { | |
243 | char *name; | |
41b96d55 | 244 | op_rtn op1; |
5d0734a7 | 245 | int bytemode1; |
41b96d55 | 246 | op_rtn op2; |
5d0734a7 | 247 | int bytemode2; |
41b96d55 | 248 | op_rtn op3; |
5d0734a7 JK |
249 | int bytemode3; |
250 | }; | |
251 | ||
be0c8b05 | 252 | static struct dis386 dis386[] = { |
5d0734a7 JK |
253 | /* 00 */ |
254 | { "addb", Eb, Gb }, | |
255 | { "addS", Ev, Gv }, | |
256 | { "addb", Gb, Eb }, | |
257 | { "addS", Gv, Ev }, | |
258 | { "addb", AL, Ib }, | |
259 | { "addS", eAX, Iv }, | |
260 | { "pushl", es }, | |
261 | { "popl", es }, | |
262 | /* 08 */ | |
263 | { "orb", Eb, Gb }, | |
264 | { "orS", Ev, Gv }, | |
265 | { "orb", Gb, Eb }, | |
266 | { "orS", Gv, Ev }, | |
267 | { "orb", AL, Ib }, | |
268 | { "orS", eAX, Iv }, | |
269 | { "pushl", cs }, | |
270 | { "(bad)" }, /* 0x0f extended opcode escape */ | |
271 | /* 10 */ | |
272 | { "adcb", Eb, Gb }, | |
273 | { "adcS", Ev, Gv }, | |
274 | { "adcb", Gb, Eb }, | |
275 | { "adcS", Gv, Ev }, | |
276 | { "adcb", AL, Ib }, | |
277 | { "adcS", eAX, Iv }, | |
278 | { "pushl", ss }, | |
279 | { "popl", ss }, | |
280 | /* 18 */ | |
281 | { "sbbb", Eb, Gb }, | |
282 | { "sbbS", Ev, Gv }, | |
283 | { "sbbb", Gb, Eb }, | |
284 | { "sbbS", Gv, Ev }, | |
285 | { "sbbb", AL, Ib }, | |
286 | { "sbbS", eAX, Iv }, | |
287 | { "pushl", ds }, | |
288 | { "popl", ds }, | |
289 | /* 20 */ | |
290 | { "andb", Eb, Gb }, | |
291 | { "andS", Ev, Gv }, | |
292 | { "andb", Gb, Eb }, | |
293 | { "andS", Gv, Ev }, | |
294 | { "andb", AL, Ib }, | |
295 | { "andS", eAX, Iv }, | |
296 | { "(bad)" }, /* SEG ES prefix */ | |
297 | { "daa" }, | |
298 | /* 28 */ | |
299 | { "subb", Eb, Gb }, | |
300 | { "subS", Ev, Gv }, | |
301 | { "subb", Gb, Eb }, | |
302 | { "subS", Gv, Ev }, | |
303 | { "subb", AL, Ib }, | |
304 | { "subS", eAX, Iv }, | |
305 | { "(bad)" }, /* SEG CS prefix */ | |
306 | { "das" }, | |
307 | /* 30 */ | |
308 | { "xorb", Eb, Gb }, | |
309 | { "xorS", Ev, Gv }, | |
310 | { "xorb", Gb, Eb }, | |
311 | { "xorS", Gv, Ev }, | |
312 | { "xorb", AL, Ib }, | |
313 | { "xorS", eAX, Iv }, | |
314 | { "(bad)" }, /* SEG SS prefix */ | |
315 | { "aaa" }, | |
316 | /* 38 */ | |
317 | { "cmpb", Eb, Gb }, | |
318 | { "cmpS", Ev, Gv }, | |
319 | { "cmpb", Gb, Eb }, | |
320 | { "cmpS", Gv, Ev }, | |
321 | { "cmpb", AL, Ib }, | |
322 | { "cmpS", eAX, Iv }, | |
323 | { "(bad)" }, /* SEG DS prefix */ | |
324 | { "aas" }, | |
325 | /* 40 */ | |
326 | { "incS", eAX }, | |
327 | { "incS", eCX }, | |
328 | { "incS", eDX }, | |
329 | { "incS", eBX }, | |
330 | { "incS", eSP }, | |
331 | { "incS", eBP }, | |
332 | { "incS", eSI }, | |
333 | { "incS", eDI }, | |
334 | /* 48 */ | |
335 | { "decS", eAX }, | |
336 | { "decS", eCX }, | |
337 | { "decS", eDX }, | |
338 | { "decS", eBX }, | |
339 | { "decS", eSP }, | |
340 | { "decS", eBP }, | |
341 | { "decS", eSI }, | |
342 | { "decS", eDI }, | |
343 | /* 50 */ | |
344 | { "pushS", eAX }, | |
345 | { "pushS", eCX }, | |
346 | { "pushS", eDX }, | |
347 | { "pushS", eBX }, | |
348 | { "pushS", eSP }, | |
349 | { "pushS", eBP }, | |
350 | { "pushS", eSI }, | |
351 | { "pushS", eDI }, | |
352 | /* 58 */ | |
353 | { "popS", eAX }, | |
354 | { "popS", eCX }, | |
355 | { "popS", eDX }, | |
356 | { "popS", eBX }, | |
357 | { "popS", eSP }, | |
358 | { "popS", eBP }, | |
359 | { "popS", eSI }, | |
360 | { "popS", eDI }, | |
361 | /* 60 */ | |
362 | { "pusha" }, | |
363 | { "popa" }, | |
364 | { "boundS", Gv, Ma }, | |
365 | { "arpl", Ew, Gw }, | |
366 | { "(bad)" }, /* seg fs */ | |
367 | { "(bad)" }, /* seg gs */ | |
368 | { "(bad)" }, /* op size prefix */ | |
369 | { "(bad)" }, /* adr size prefix */ | |
370 | /* 68 */ | |
371 | { "pushS", Iv }, /* 386 book wrong */ | |
372 | { "imulS", Gv, Ev, Iv }, | |
373 | { "pushl", sIb }, /* push of byte really pushes 4 bytes */ | |
374 | { "imulS", Gv, Ev, Ib }, | |
375 | { "insb", Yb, indirDX }, | |
376 | { "insS", Yv, indirDX }, | |
377 | { "outsb", indirDX, Xb }, | |
378 | { "outsS", indirDX, Xv }, | |
379 | /* 70 */ | |
03db5a93 | 380 | { "jo", Jb }, |
5d0734a7 | 381 | { "jno", Jb }, |
03db5a93 | 382 | { "jb", Jb }, |
5d0734a7 | 383 | { "jae", Jb }, |
03db5a93 | 384 | { "je", Jb }, |
5d0734a7 JK |
385 | { "jne", Jb }, |
386 | { "jbe", Jb }, | |
03db5a93 | 387 | { "ja", Jb }, |
5d0734a7 | 388 | /* 78 */ |
03db5a93 | 389 | { "js", Jb }, |
5d0734a7 | 390 | { "jns", Jb }, |
03db5a93 | 391 | { "jp", Jb }, |
5d0734a7 | 392 | { "jnp", Jb }, |
03db5a93 | 393 | { "jl", Jb }, |
5d0734a7 JK |
394 | { "jnl", Jb }, |
395 | { "jle", Jb }, | |
03db5a93 | 396 | { "jg", Jb }, |
5d0734a7 JK |
397 | /* 80 */ |
398 | { GRP1b }, | |
399 | { GRP1S }, | |
400 | { "(bad)" }, | |
401 | { GRP1Ss }, | |
402 | { "testb", Eb, Gb }, | |
403 | { "testS", Ev, Gv }, | |
404 | { "xchgb", Eb, Gb }, | |
405 | { "xchgS", Ev, Gv }, | |
406 | /* 88 */ | |
407 | { "movb", Eb, Gb }, | |
408 | { "movS", Ev, Gv }, | |
409 | { "movb", Gb, Eb }, | |
410 | { "movS", Gv, Ev }, | |
411 | { "movw", Ew, Sw }, | |
412 | { "leaS", Gv, M }, | |
413 | { "movw", Sw, Ew }, | |
414 | { "popS", Ev }, | |
415 | /* 90 */ | |
416 | { "nop" }, | |
417 | { "xchgS", eCX, eAX }, | |
418 | { "xchgS", eDX, eAX }, | |
419 | { "xchgS", eBX, eAX }, | |
420 | { "xchgS", eSP, eAX }, | |
421 | { "xchgS", eBP, eAX }, | |
422 | { "xchgS", eSI, eAX }, | |
423 | { "xchgS", eDI, eAX }, | |
424 | /* 98 */ | |
425 | { "cwtl" }, | |
426 | { "cltd" }, | |
427 | { "lcall", Ap }, | |
428 | { "(bad)" }, /* fwait */ | |
429 | { "pushf" }, | |
430 | { "popf" }, | |
431 | { "sahf" }, | |
432 | { "lahf" }, | |
433 | /* a0 */ | |
434 | { "movb", AL, Ob }, | |
435 | { "movS", eAX, Ov }, | |
436 | { "movb", Ob, AL }, | |
437 | { "movS", Ov, eAX }, | |
438 | { "movsb", Yb, Xb }, | |
439 | { "movsS", Yv, Xv }, | |
440 | { "cmpsb", Yb, Xb }, | |
441 | { "cmpsS", Yv, Xv }, | |
442 | /* a8 */ | |
443 | { "testb", AL, Ib }, | |
444 | { "testS", eAX, Iv }, | |
445 | { "stosb", Yb, AL }, | |
446 | { "stosS", Yv, eAX }, | |
447 | { "lodsb", AL, Xb }, | |
448 | { "lodsS", eAX, Xv }, | |
a279b1f5 JK |
449 | { "scasb", AL, Yb }, |
450 | { "scasS", eAX, Yv }, | |
5d0734a7 JK |
451 | /* b0 */ |
452 | { "movb", AL, Ib }, | |
453 | { "movb", CL, Ib }, | |
454 | { "movb", DL, Ib }, | |
455 | { "movb", BL, Ib }, | |
456 | { "movb", AH, Ib }, | |
457 | { "movb", CH, Ib }, | |
458 | { "movb", DH, Ib }, | |
459 | { "movb", BH, Ib }, | |
460 | /* b8 */ | |
461 | { "movS", eAX, Iv }, | |
462 | { "movS", eCX, Iv }, | |
463 | { "movS", eDX, Iv }, | |
464 | { "movS", eBX, Iv }, | |
465 | { "movS", eSP, Iv }, | |
466 | { "movS", eBP, Iv }, | |
467 | { "movS", eSI, Iv }, | |
468 | { "movS", eDI, Iv }, | |
469 | /* c0 */ | |
470 | { GRP2b }, | |
471 | { GRP2S }, | |
472 | { "ret", Iw }, | |
473 | { "ret" }, | |
474 | { "lesS", Gv, Mp }, | |
475 | { "ldsS", Gv, Mp }, | |
476 | { "movb", Eb, Ib }, | |
477 | { "movS", Ev, Iv }, | |
478 | /* c8 */ | |
479 | { "enter", Iw, Ib }, | |
480 | { "leave" }, | |
481 | { "lret", Iw }, | |
482 | { "lret" }, | |
483 | { "int3" }, | |
484 | { "int", Ib }, | |
485 | { "into" }, | |
486 | { "iret" }, | |
487 | /* d0 */ | |
488 | { GRP2b_one }, | |
489 | { GRP2S_one }, | |
490 | { GRP2b_cl }, | |
491 | { GRP2S_cl }, | |
492 | { "aam", Ib }, | |
493 | { "aad", Ib }, | |
494 | { "(bad)" }, | |
495 | { "xlat" }, | |
496 | /* d8 */ | |
497 | { FLOAT }, | |
498 | { FLOAT }, | |
499 | { FLOAT }, | |
500 | { FLOAT }, | |
501 | { FLOAT }, | |
502 | { FLOAT }, | |
503 | { FLOAT }, | |
504 | { FLOAT }, | |
505 | /* e0 */ | |
506 | { "loopne", Jb }, | |
507 | { "loope", Jb }, | |
508 | { "loop", Jb }, | |
509 | { "jCcxz", Jb }, | |
510 | { "inb", AL, Ib }, | |
511 | { "inS", eAX, Ib }, | |
512 | { "outb", Ib, AL }, | |
513 | { "outS", Ib, eAX }, | |
514 | /* e8 */ | |
515 | { "call", Av }, | |
516 | { "jmp", Jv }, | |
517 | { "ljmp", Ap }, | |
518 | { "jmp", Jb }, | |
519 | { "inb", AL, indirDX }, | |
520 | { "inS", eAX, indirDX }, | |
521 | { "outb", indirDX, AL }, | |
522 | { "outS", indirDX, eAX }, | |
523 | /* f0 */ | |
524 | { "(bad)" }, /* lock prefix */ | |
525 | { "(bad)" }, | |
526 | { "(bad)" }, /* repne */ | |
527 | { "(bad)" }, /* repz */ | |
528 | { "hlt" }, | |
529 | { "cmc" }, | |
530 | { GRP3b }, | |
531 | { GRP3S }, | |
532 | /* f8 */ | |
533 | { "clc" }, | |
534 | { "stc" }, | |
535 | { "cli" }, | |
536 | { "sti" }, | |
537 | { "cld" }, | |
538 | { "std" }, | |
539 | { GRP4 }, | |
540 | { GRP5 }, | |
541 | }; | |
542 | ||
be0c8b05 | 543 | static struct dis386 dis386_twobyte[] = { |
5d0734a7 JK |
544 | /* 00 */ |
545 | { GRP6 }, | |
546 | { GRP7 }, | |
547 | { "larS", Gv, Ew }, | |
548 | { "lslS", Gv, Ew }, | |
549 | { "(bad)" }, | |
550 | { "(bad)" }, | |
551 | { "clts" }, | |
552 | { "(bad)" }, | |
553 | /* 08 */ | |
554 | { "invd" }, | |
555 | { "wbinvd" }, | |
1d935cf6 | 556 | { "(bad)" }, { "ud2a" }, |
5d0734a7 JK |
557 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
558 | /* 10 */ | |
559 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
560 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
561 | /* 18 */ | |
562 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
563 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
564 | /* 20 */ | |
565 | /* these are all backward in appendix A of the intel book */ | |
566 | { "movl", Rd, Cd }, | |
567 | { "movl", Rd, Dd }, | |
568 | { "movl", Cd, Rd }, | |
569 | { "movl", Dd, Rd }, | |
570 | { "movl", Rd, Td }, | |
571 | { "(bad)" }, | |
572 | { "movl", Td, Rd }, | |
573 | { "(bad)" }, | |
574 | /* 28 */ | |
575 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
576 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
577 | /* 30 */ | |
1d935cf6 | 578 | { "wrmsr" }, { "rdtsc" }, { "rdmsr" }, { "rdpmc" }, |
5d0734a7 JK |
579 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, |
580 | /* 38 */ | |
581 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
582 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
583 | /* 40 */ | |
1d935cf6 MM |
584 | { "cmovo", Gv,Ev }, { "cmovno", Gv,Ev }, { "cmovb", Gv,Ev }, { "cmovae", Gv,Ev }, |
585 | { "cmove", Gv,Ev }, { "cmovne", Gv,Ev }, { "cmovbe", Gv,Ev }, { "cmova", Gv,Ev }, | |
5d0734a7 | 586 | /* 48 */ |
1d935cf6 MM |
587 | { "cmovs", Gv,Ev }, { "cmovns", Gv,Ev }, { "cmovp", Gv,Ev }, { "cmovnp", Gv,Ev }, |
588 | { "cmovl", Gv,Ev }, { "cmovge", Gv,Ev }, { "cmovle", Gv,Ev }, { "cmovg", Gv,Ev }, | |
5d0734a7 JK |
589 | /* 50 */ |
590 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
591 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
592 | /* 58 */ | |
593 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
594 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
595 | /* 60 */ | |
596 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
597 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
598 | /* 68 */ | |
599 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
600 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
601 | /* 70 */ | |
602 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
603 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
604 | /* 78 */ | |
605 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
606 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
607 | /* 80 */ | |
608 | { "jo", Jv }, | |
609 | { "jno", Jv }, | |
610 | { "jb", Jv }, | |
611 | { "jae", Jv }, | |
612 | { "je", Jv }, | |
613 | { "jne", Jv }, | |
614 | { "jbe", Jv }, | |
615 | { "ja", Jv }, | |
616 | /* 88 */ | |
617 | { "js", Jv }, | |
618 | { "jns", Jv }, | |
619 | { "jp", Jv }, | |
620 | { "jnp", Jv }, | |
621 | { "jl", Jv }, | |
622 | { "jge", Jv }, | |
623 | { "jle", Jv }, | |
624 | { "jg", Jv }, | |
625 | /* 90 */ | |
626 | { "seto", Eb }, | |
627 | { "setno", Eb }, | |
628 | { "setb", Eb }, | |
629 | { "setae", Eb }, | |
630 | { "sete", Eb }, | |
631 | { "setne", Eb }, | |
632 | { "setbe", Eb }, | |
633 | { "seta", Eb }, | |
634 | /* 98 */ | |
635 | { "sets", Eb }, | |
636 | { "setns", Eb }, | |
637 | { "setp", Eb }, | |
638 | { "setnp", Eb }, | |
639 | { "setl", Eb }, | |
640 | { "setge", Eb }, | |
641 | { "setle", Eb }, | |
642 | { "setg", Eb }, | |
643 | /* a0 */ | |
644 | { "pushl", fs }, | |
645 | { "popl", fs }, | |
726257a8 | 646 | { "cpuid" }, |
5d0734a7 JK |
647 | { "btS", Ev, Gv }, |
648 | { "shldS", Ev, Gv, Ib }, | |
649 | { "shldS", Ev, Gv, CL }, | |
650 | { "(bad)" }, | |
651 | { "(bad)" }, | |
652 | /* a8 */ | |
653 | { "pushl", gs }, | |
654 | { "popl", gs }, | |
726257a8 | 655 | { "rsm" }, |
5d0734a7 JK |
656 | { "btsS", Ev, Gv }, |
657 | { "shrdS", Ev, Gv, Ib }, | |
658 | { "shrdS", Ev, Gv, CL }, | |
659 | { "(bad)" }, | |
660 | { "imulS", Gv, Ev }, | |
661 | /* b0 */ | |
662 | { "cmpxchgb", Eb, Gb }, | |
663 | { "cmpxchgS", Ev, Gv }, | |
664 | { "lssS", Gv, Mp }, /* 386 lists only Mp */ | |
665 | { "btrS", Ev, Gv }, | |
666 | { "lfsS", Gv, Mp }, /* 386 lists only Mp */ | |
667 | { "lgsS", Gv, Mp }, /* 386 lists only Mp */ | |
668 | { "movzbS", Gv, Eb }, | |
669 | { "movzwS", Gv, Ew }, | |
670 | /* b8 */ | |
1d935cf6 | 671 | { "ud2b" }, |
5d0734a7 JK |
672 | { "(bad)" }, |
673 | { GRP8 }, | |
674 | { "btcS", Ev, Gv }, | |
675 | { "bsfS", Gv, Ev }, | |
676 | { "bsrS", Gv, Ev }, | |
677 | { "movsbS", Gv, Eb }, | |
678 | { "movswS", Gv, Ew }, | |
679 | /* c0 */ | |
680 | { "xaddb", Eb, Gb }, | |
681 | { "xaddS", Ev, Gv }, | |
726257a8 KR |
682 | { "(bad)" }, |
683 | { "(bad)" }, | |
684 | { "(bad)" }, | |
685 | { "(bad)" }, | |
686 | { "(bad)" }, | |
687 | { GRP9 }, | |
5d0734a7 JK |
688 | /* c8 */ |
689 | { "bswap", eAX }, | |
690 | { "bswap", eCX }, | |
691 | { "bswap", eDX }, | |
692 | { "bswap", eBX }, | |
693 | { "bswap", eSP }, | |
694 | { "bswap", eBP }, | |
695 | { "bswap", eSI }, | |
696 | { "bswap", eDI }, | |
697 | /* d0 */ | |
698 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
699 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
700 | /* d8 */ | |
701 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
702 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
703 | /* e0 */ | |
704 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
705 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
706 | /* e8 */ | |
707 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
708 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
709 | /* f0 */ | |
710 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
711 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
712 | /* f8 */ | |
713 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
714 | { "(bad)" }, { "(bad)" }, { "(bad)" }, { "(bad)" }, | |
715 | }; | |
716 | ||
03db5a93 ILT |
717 | static const unsigned char onebyte_has_modrm[256] = { |
718 | 1,1,1,1,0,0,0,0,1,1,1,1,0,0,0,0, | |
719 | 1,1,1,1,0,0,0,0,1,1,1,1,0,0,0,0, | |
720 | 1,1,1,1,0,0,0,0,1,1,1,1,0,0,0,0, | |
721 | 1,1,1,1,0,0,0,0,1,1,1,1,0,0,0,0, | |
722 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, | |
723 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, | |
724 | 0,0,1,1,0,0,0,0,0,1,0,1,0,0,0,0, | |
725 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, | |
726 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, | |
727 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, | |
728 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, | |
729 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, | |
730 | 1,1,0,0,1,1,1,1,0,0,0,0,0,0,0,0, | |
731 | 1,1,1,1,0,0,0,0,1,1,1,1,1,1,1,1, | |
732 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, | |
733 | 0,0,0,0,0,0,1,1,0,0,0,0,0,0,1,1 | |
734 | }; | |
735 | ||
736 | static const unsigned char twobyte_has_modrm[256] = { | |
737 | 1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0, | |
738 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, | |
739 | 1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0, | |
740 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, | |
741 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, | |
742 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, | |
743 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, | |
744 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, | |
745 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, | |
746 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, | |
747 | 0,0,0,1,1,1,1,1,0,0,0,1,1,1,1,1, | |
748 | 1,1,1,1,1,1,1,1,0,0,1,1,1,1,1,1, | |
749 | 1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0, | |
750 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, | |
751 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, | |
752 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 | |
753 | }; | |
754 | ||
5d0734a7 JK |
755 | static char obuf[100]; |
756 | static char *obufp; | |
757 | static char scratchbuf[100]; | |
758 | static unsigned char *start_codep; | |
759 | static unsigned char *codep; | |
760 | static disassemble_info *the_info; | |
761 | static int mod; | |
762 | static int rm; | |
763 | static int reg; | |
be0c8b05 | 764 | static void oappend PARAMS ((char *s)); |
5d0734a7 JK |
765 | |
766 | static char *names32[]={ | |
767 | "%eax","%ecx","%edx","%ebx", "%esp","%ebp","%esi","%edi", | |
768 | }; | |
769 | static char *names16[] = { | |
770 | "%ax","%cx","%dx","%bx","%sp","%bp","%si","%di", | |
771 | }; | |
772 | static char *names8[] = { | |
773 | "%al","%cl","%dl","%bl","%ah","%ch","%dh","%bh", | |
774 | }; | |
775 | static char *names_seg[] = { | |
776 | "%es","%cs","%ss","%ds","%fs","%gs","%?","%?", | |
777 | }; | |
be0c8b05 SG |
778 | static char *index16[] = { |
779 | "bx+si","bx+di","bp+si","bp+di","si","di","bp","bx" | |
780 | }; | |
5d0734a7 | 781 | |
be0c8b05 | 782 | static struct dis386 grps[][8] = { |
5d0734a7 JK |
783 | /* GRP1b */ |
784 | { | |
785 | { "addb", Eb, Ib }, | |
786 | { "orb", Eb, Ib }, | |
787 | { "adcb", Eb, Ib }, | |
788 | { "sbbb", Eb, Ib }, | |
789 | { "andb", Eb, Ib }, | |
790 | { "subb", Eb, Ib }, | |
791 | { "xorb", Eb, Ib }, | |
792 | { "cmpb", Eb, Ib } | |
793 | }, | |
794 | /* GRP1S */ | |
795 | { | |
796 | { "addS", Ev, Iv }, | |
797 | { "orS", Ev, Iv }, | |
798 | { "adcS", Ev, Iv }, | |
799 | { "sbbS", Ev, Iv }, | |
800 | { "andS", Ev, Iv }, | |
801 | { "subS", Ev, Iv }, | |
802 | { "xorS", Ev, Iv }, | |
803 | { "cmpS", Ev, Iv } | |
804 | }, | |
805 | /* GRP1Ss */ | |
806 | { | |
807 | { "addS", Ev, sIb }, | |
808 | { "orS", Ev, sIb }, | |
809 | { "adcS", Ev, sIb }, | |
810 | { "sbbS", Ev, sIb }, | |
811 | { "andS", Ev, sIb }, | |
812 | { "subS", Ev, sIb }, | |
813 | { "xorS", Ev, sIb }, | |
814 | { "cmpS", Ev, sIb } | |
815 | }, | |
816 | /* GRP2b */ | |
817 | { | |
818 | { "rolb", Eb, Ib }, | |
819 | { "rorb", Eb, Ib }, | |
820 | { "rclb", Eb, Ib }, | |
821 | { "rcrb", Eb, Ib }, | |
822 | { "shlb", Eb, Ib }, | |
823 | { "shrb", Eb, Ib }, | |
824 | { "(bad)" }, | |
825 | { "sarb", Eb, Ib }, | |
826 | }, | |
827 | /* GRP2S */ | |
828 | { | |
829 | { "rolS", Ev, Ib }, | |
830 | { "rorS", Ev, Ib }, | |
831 | { "rclS", Ev, Ib }, | |
832 | { "rcrS", Ev, Ib }, | |
833 | { "shlS", Ev, Ib }, | |
834 | { "shrS", Ev, Ib }, | |
835 | { "(bad)" }, | |
836 | { "sarS", Ev, Ib }, | |
837 | }, | |
838 | /* GRP2b_one */ | |
839 | { | |
840 | { "rolb", Eb }, | |
841 | { "rorb", Eb }, | |
842 | { "rclb", Eb }, | |
843 | { "rcrb", Eb }, | |
844 | { "shlb", Eb }, | |
845 | { "shrb", Eb }, | |
846 | { "(bad)" }, | |
847 | { "sarb", Eb }, | |
848 | }, | |
849 | /* GRP2S_one */ | |
850 | { | |
851 | { "rolS", Ev }, | |
852 | { "rorS", Ev }, | |
853 | { "rclS", Ev }, | |
854 | { "rcrS", Ev }, | |
855 | { "shlS", Ev }, | |
856 | { "shrS", Ev }, | |
857 | { "(bad)" }, | |
858 | { "sarS", Ev }, | |
859 | }, | |
860 | /* GRP2b_cl */ | |
861 | { | |
862 | { "rolb", Eb, CL }, | |
863 | { "rorb", Eb, CL }, | |
864 | { "rclb", Eb, CL }, | |
865 | { "rcrb", Eb, CL }, | |
866 | { "shlb", Eb, CL }, | |
867 | { "shrb", Eb, CL }, | |
868 | { "(bad)" }, | |
869 | { "sarb", Eb, CL }, | |
870 | }, | |
871 | /* GRP2S_cl */ | |
872 | { | |
873 | { "rolS", Ev, CL }, | |
874 | { "rorS", Ev, CL }, | |
875 | { "rclS", Ev, CL }, | |
876 | { "rcrS", Ev, CL }, | |
877 | { "shlS", Ev, CL }, | |
878 | { "shrS", Ev, CL }, | |
879 | { "(bad)" }, | |
880 | { "sarS", Ev, CL } | |
881 | }, | |
882 | /* GRP3b */ | |
883 | { | |
884 | { "testb", Eb, Ib }, | |
885 | { "(bad)", Eb }, | |
886 | { "notb", Eb }, | |
887 | { "negb", Eb }, | |
888 | { "mulb", AL, Eb }, | |
889 | { "imulb", AL, Eb }, | |
890 | { "divb", AL, Eb }, | |
891 | { "idivb", AL, Eb } | |
892 | }, | |
893 | /* GRP3S */ | |
894 | { | |
895 | { "testS", Ev, Iv }, | |
896 | { "(bad)" }, | |
897 | { "notS", Ev }, | |
898 | { "negS", Ev }, | |
899 | { "mulS", eAX, Ev }, | |
900 | { "imulS", eAX, Ev }, | |
901 | { "divS", eAX, Ev }, | |
902 | { "idivS", eAX, Ev }, | |
903 | }, | |
904 | /* GRP4 */ | |
905 | { | |
906 | { "incb", Eb }, | |
907 | { "decb", Eb }, | |
908 | { "(bad)" }, | |
909 | { "(bad)" }, | |
910 | { "(bad)" }, | |
911 | { "(bad)" }, | |
912 | { "(bad)" }, | |
913 | { "(bad)" }, | |
914 | }, | |
915 | /* GRP5 */ | |
916 | { | |
917 | { "incS", Ev }, | |
918 | { "decS", Ev }, | |
919 | { "call", indirEv }, | |
920 | { "lcall", indirEv }, | |
921 | { "jmp", indirEv }, | |
922 | { "ljmp", indirEv }, | |
923 | { "pushS", Ev }, | |
924 | { "(bad)" }, | |
925 | }, | |
926 | /* GRP6 */ | |
927 | { | |
928 | { "sldt", Ew }, | |
929 | { "str", Ew }, | |
930 | { "lldt", Ew }, | |
931 | { "ltr", Ew }, | |
932 | { "verr", Ew }, | |
933 | { "verw", Ew }, | |
934 | { "(bad)" }, | |
935 | { "(bad)" } | |
936 | }, | |
937 | /* GRP7 */ | |
938 | { | |
939 | { "sgdt", Ew }, | |
940 | { "sidt", Ew }, | |
941 | { "lgdt", Ew }, | |
942 | { "lidt", Ew }, | |
943 | { "smsw", Ew }, | |
944 | { "(bad)" }, | |
945 | { "lmsw", Ew }, | |
946 | { "invlpg", Ew }, | |
947 | }, | |
948 | /* GRP8 */ | |
949 | { | |
950 | { "(bad)" }, | |
951 | { "(bad)" }, | |
952 | { "(bad)" }, | |
953 | { "(bad)" }, | |
954 | { "btS", Ev, Ib }, | |
955 | { "btsS", Ev, Ib }, | |
956 | { "btrS", Ev, Ib }, | |
957 | { "btcS", Ev, Ib }, | |
726257a8 KR |
958 | }, |
959 | /* GRP9 */ | |
960 | { | |
961 | { "(bad)" }, | |
1d935cf6 | 962 | { "cmpxchg8b", Ev }, |
726257a8 KR |
963 | { "(bad)" }, |
964 | { "(bad)" }, | |
965 | { "(bad)" }, | |
966 | { "(bad)" }, | |
967 | { "(bad)" }, | |
968 | { "(bad)" }, | |
5d0734a7 JK |
969 | } |
970 | }; | |
971 | ||
972 | #define PREFIX_REPZ 1 | |
973 | #define PREFIX_REPNZ 2 | |
974 | #define PREFIX_LOCK 4 | |
975 | #define PREFIX_CS 8 | |
976 | #define PREFIX_SS 0x10 | |
977 | #define PREFIX_DS 0x20 | |
978 | #define PREFIX_ES 0x40 | |
979 | #define PREFIX_FS 0x80 | |
980 | #define PREFIX_GS 0x100 | |
981 | #define PREFIX_DATA 0x200 | |
982 | #define PREFIX_ADR 0x400 | |
983 | #define PREFIX_FWAIT 0x800 | |
984 | ||
985 | static int prefixes; | |
986 | ||
987 | static void | |
988 | ckprefix () | |
989 | { | |
990 | prefixes = 0; | |
991 | while (1) | |
992 | { | |
993 | FETCH_DATA (the_info, codep + 1); | |
994 | switch (*codep) | |
995 | { | |
996 | case 0xf3: | |
997 | prefixes |= PREFIX_REPZ; | |
998 | break; | |
999 | case 0xf2: | |
1000 | prefixes |= PREFIX_REPNZ; | |
1001 | break; | |
1002 | case 0xf0: | |
1003 | prefixes |= PREFIX_LOCK; | |
1004 | break; | |
1005 | case 0x2e: | |
1006 | prefixes |= PREFIX_CS; | |
1007 | break; | |
1008 | case 0x36: | |
1009 | prefixes |= PREFIX_SS; | |
1010 | break; | |
1011 | case 0x3e: | |
1012 | prefixes |= PREFIX_DS; | |
1013 | break; | |
1014 | case 0x26: | |
1015 | prefixes |= PREFIX_ES; | |
1016 | break; | |
1017 | case 0x64: | |
1018 | prefixes |= PREFIX_FS; | |
1019 | break; | |
1020 | case 0x65: | |
1021 | prefixes |= PREFIX_GS; | |
1022 | break; | |
1023 | case 0x66: | |
1024 | prefixes |= PREFIX_DATA; | |
1025 | break; | |
1026 | case 0x67: | |
1027 | prefixes |= PREFIX_ADR; | |
1028 | break; | |
1029 | case 0x9b: | |
1030 | prefixes |= PREFIX_FWAIT; | |
1031 | break; | |
1032 | default: | |
1033 | return; | |
1034 | } | |
1035 | codep++; | |
1036 | } | |
1037 | } | |
1038 | ||
5d0734a7 JK |
1039 | static char op1out[100], op2out[100], op3out[100]; |
1040 | static int op_address[3], op_ad, op_index[3]; | |
1041 | static int start_pc; | |
1042 | ||
1043 | \f | |
1044 | /* | |
1045 | * On the 386's of 1988, the maximum length of an instruction is 15 bytes. | |
1046 | * (see topic "Redundant prefixes" in the "Differences from 8086" | |
1047 | * section of the "Virtual 8086 Mode" chapter.) | |
1048 | * 'pc' should be the address of this instruction, it will | |
1049 | * be used to print the target address if this is a relative jump or call | |
1050 | * The function returns the length of this instruction in bytes. | |
1051 | */ | |
1052 | ||
be0c8b05 SG |
1053 | int print_insn_x86 PARAMS ((bfd_vma pc, disassemble_info *info, int aflag, |
1054 | int dflag)); | |
5d0734a7 JK |
1055 | int |
1056 | print_insn_i386 (pc, info) | |
1057 | bfd_vma pc; | |
1058 | disassemble_info *info; | |
be0c8b05 | 1059 | { |
d9ad578c | 1060 | if (info->mach == bfd_mach_i386_i386) |
41b96d55 | 1061 | return print_insn_x86 (pc, info, 1, 1); |
d9ad578c | 1062 | else if (info->mach == bfd_mach_i386_i8086) |
41b96d55 | 1063 | return print_insn_x86 (pc, info, 0, 0); |
d9ad578c SG |
1064 | else |
1065 | abort (); | |
be0c8b05 SG |
1066 | } |
1067 | ||
1068 | int | |
1069 | print_insn_x86 (pc, info, aflag, dflag) | |
1070 | bfd_vma pc; | |
1071 | disassemble_info *info; | |
5d0734a7 JK |
1072 | { |
1073 | struct dis386 *dp; | |
1074 | int i; | |
1075 | int enter_instruction; | |
1076 | char *first, *second, *third; | |
1077 | int needcomma; | |
03db5a93 ILT |
1078 | unsigned char need_modrm; |
1079 | ||
726257a8 | 1080 | struct dis_private priv; |
5d0734a7 JK |
1081 | bfd_byte *inbuf = priv.the_buffer; |
1082 | ||
41b96d55 ILT |
1083 | /* The output looks better if we put 5 bytes on a line, since that |
1084 | puts long word instructions on a single line. */ | |
1085 | info->bytes_per_line = 5; | |
1086 | ||
5d0734a7 JK |
1087 | info->private_data = (PTR) &priv; |
1088 | priv.max_fetched = priv.the_buffer; | |
1089 | priv.insn_start = pc; | |
1090 | if (setjmp (priv.bailout) != 0) | |
1091 | /* Error return. */ | |
1092 | return -1; | |
1093 | ||
1094 | obuf[0] = 0; | |
1095 | op1out[0] = 0; | |
1096 | op2out[0] = 0; | |
1097 | op3out[0] = 0; | |
1098 | ||
1099 | op_index[0] = op_index[1] = op_index[2] = -1; | |
1100 | ||
1101 | the_info = info; | |
1102 | start_pc = pc; | |
1103 | start_codep = inbuf; | |
1104 | codep = inbuf; | |
1105 | ||
1106 | ckprefix (); | |
1107 | ||
1108 | FETCH_DATA (info, codep + 1); | |
1109 | if (*codep == 0xc8) | |
1110 | enter_instruction = 1; | |
1111 | else | |
1112 | enter_instruction = 0; | |
1113 | ||
1114 | obufp = obuf; | |
1115 | ||
1116 | if (prefixes & PREFIX_REPZ) | |
1117 | oappend ("repz "); | |
1118 | if (prefixes & PREFIX_REPNZ) | |
1119 | oappend ("repnz "); | |
1120 | if (prefixes & PREFIX_LOCK) | |
1121 | oappend ("lock "); | |
1122 | ||
1123 | if ((prefixes & PREFIX_FWAIT) | |
1124 | && ((*codep < 0xd8) || (*codep > 0xdf))) | |
1125 | { | |
1126 | /* fwait not followed by floating point instruction */ | |
1127 | (*info->fprintf_func) (info->stream, "fwait"); | |
1128 | return (1); | |
1129 | } | |
1130 | ||
5d0734a7 JK |
1131 | if (prefixes & PREFIX_DATA) |
1132 | dflag ^= 1; | |
1133 | ||
1134 | if (prefixes & PREFIX_ADR) | |
1135 | { | |
1136 | aflag ^= 1; | |
1137 | oappend ("addr16 "); | |
1138 | } | |
1139 | ||
1140 | if (*codep == 0x0f) | |
1141 | { | |
1142 | FETCH_DATA (info, codep + 2); | |
1143 | dp = &dis386_twobyte[*++codep]; | |
03db5a93 | 1144 | need_modrm = twobyte_has_modrm[*codep]; |
5d0734a7 JK |
1145 | } |
1146 | else | |
03db5a93 ILT |
1147 | { |
1148 | dp = &dis386[*codep]; | |
1149 | need_modrm = onebyte_has_modrm[*codep]; | |
1150 | } | |
5d0734a7 | 1151 | codep++; |
5c9b5f58 | 1152 | |
03db5a93 ILT |
1153 | if (need_modrm) |
1154 | { | |
1155 | FETCH_DATA (info, codep + 1); | |
1156 | mod = (*codep >> 6) & 3; | |
1157 | reg = (*codep >> 3) & 7; | |
1158 | rm = *codep & 7; | |
1159 | } | |
5c9b5f58 | 1160 | |
5d0734a7 JK |
1161 | if (dp->name == NULL && dp->bytemode1 == FLOATCODE) |
1162 | { | |
be0c8b05 | 1163 | dofloat (aflag, dflag); |
5d0734a7 JK |
1164 | } |
1165 | else | |
1166 | { | |
1167 | if (dp->name == NULL) | |
1168 | dp = &grps[dp->bytemode1][reg]; | |
1169 | ||
be0c8b05 | 1170 | putop (dp->name, aflag, dflag); |
5d0734a7 JK |
1171 | |
1172 | obufp = op1out; | |
1173 | op_ad = 2; | |
1174 | if (dp->op1) | |
be0c8b05 | 1175 | (*dp->op1)(dp->bytemode1, aflag, dflag); |
5d0734a7 JK |
1176 | |
1177 | obufp = op2out; | |
1178 | op_ad = 1; | |
1179 | if (dp->op2) | |
be0c8b05 | 1180 | (*dp->op2)(dp->bytemode2, aflag, dflag); |
5d0734a7 JK |
1181 | |
1182 | obufp = op3out; | |
1183 | op_ad = 0; | |
1184 | if (dp->op3) | |
be0c8b05 | 1185 | (*dp->op3)(dp->bytemode3, aflag, dflag); |
5d0734a7 JK |
1186 | } |
1187 | ||
1188 | obufp = obuf + strlen (obuf); | |
1189 | for (i = strlen (obuf); i < 6; i++) | |
1190 | oappend (" "); | |
1191 | oappend (" "); | |
1192 | (*info->fprintf_func) (info->stream, "%s", obuf); | |
1193 | ||
1194 | /* enter instruction is printed with operands in the | |
1195 | * same order as the intel book; everything else | |
1196 | * is printed in reverse order | |
1197 | */ | |
1198 | if (enter_instruction) | |
1199 | { | |
1200 | first = op1out; | |
1201 | second = op2out; | |
1202 | third = op3out; | |
1203 | op_ad = op_index[0]; | |
1204 | op_index[0] = op_index[2]; | |
1205 | op_index[2] = op_ad; | |
1206 | } | |
1207 | else | |
1208 | { | |
1209 | first = op3out; | |
1210 | second = op2out; | |
1211 | third = op1out; | |
1212 | } | |
1213 | needcomma = 0; | |
1214 | if (*first) | |
1215 | { | |
1216 | if (op_index[0] != -1) | |
a279b1f5 | 1217 | (*info->print_address_func) (op_address[op_index[0]], info); |
5d0734a7 JK |
1218 | else |
1219 | (*info->fprintf_func) (info->stream, "%s", first); | |
1220 | needcomma = 1; | |
1221 | } | |
1222 | if (*second) | |
1223 | { | |
1224 | if (needcomma) | |
1225 | (*info->fprintf_func) (info->stream, ","); | |
1226 | if (op_index[1] != -1) | |
a279b1f5 | 1227 | (*info->print_address_func) (op_address[op_index[1]], info); |
5d0734a7 JK |
1228 | else |
1229 | (*info->fprintf_func) (info->stream, "%s", second); | |
1230 | needcomma = 1; | |
1231 | } | |
1232 | if (*third) | |
1233 | { | |
1234 | if (needcomma) | |
1235 | (*info->fprintf_func) (info->stream, ","); | |
1236 | if (op_index[2] != -1) | |
a279b1f5 | 1237 | (*info->print_address_func) (op_address[op_index[2]], info); |
5d0734a7 JK |
1238 | else |
1239 | (*info->fprintf_func) (info->stream, "%s", third); | |
1240 | } | |
1241 | return (codep - inbuf); | |
1242 | } | |
1243 | ||
be0c8b05 | 1244 | static char *float_mem[] = { |
5d0734a7 JK |
1245 | /* d8 */ |
1246 | "fadds", | |
1247 | "fmuls", | |
1248 | "fcoms", | |
1249 | "fcomps", | |
1250 | "fsubs", | |
1251 | "fsubrs", | |
1252 | "fdivs", | |
1253 | "fdivrs", | |
1254 | /* d9 */ | |
1255 | "flds", | |
1256 | "(bad)", | |
1257 | "fsts", | |
1258 | "fstps", | |
1259 | "fldenv", | |
1260 | "fldcw", | |
1261 | "fNstenv", | |
1262 | "fNstcw", | |
1263 | /* da */ | |
1264 | "fiaddl", | |
1265 | "fimull", | |
1266 | "ficoml", | |
1267 | "ficompl", | |
1268 | "fisubl", | |
1269 | "fisubrl", | |
1270 | "fidivl", | |
1271 | "fidivrl", | |
1272 | /* db */ | |
1273 | "fildl", | |
1274 | "(bad)", | |
1275 | "fistl", | |
1276 | "fistpl", | |
1277 | "(bad)", | |
1278 | "fldt", | |
1279 | "(bad)", | |
1280 | "fstpt", | |
1281 | /* dc */ | |
1282 | "faddl", | |
1283 | "fmull", | |
1284 | "fcoml", | |
1285 | "fcompl", | |
1286 | "fsubl", | |
1287 | "fsubrl", | |
1288 | "fdivl", | |
1289 | "fdivrl", | |
1290 | /* dd */ | |
1291 | "fldl", | |
1292 | "(bad)", | |
1293 | "fstl", | |
1294 | "fstpl", | |
1295 | "frstor", | |
1296 | "(bad)", | |
1297 | "fNsave", | |
1298 | "fNstsw", | |
1299 | /* de */ | |
1300 | "fiadd", | |
1301 | "fimul", | |
1302 | "ficom", | |
1303 | "ficomp", | |
1304 | "fisub", | |
1305 | "fisubr", | |
1306 | "fidiv", | |
1307 | "fidivr", | |
1308 | /* df */ | |
1309 | "fild", | |
1310 | "(bad)", | |
1311 | "fist", | |
1312 | "fistp", | |
1313 | "fbld", | |
1314 | "fildll", | |
1315 | "fbstp", | |
1316 | "fistpll", | |
1317 | }; | |
1318 | ||
1319 | #define ST OP_ST, 0 | |
1320 | #define STi OP_STi, 0 | |
5d0734a7 JK |
1321 | |
1322 | #define FGRPd9_2 NULL, NULL, 0 | |
1323 | #define FGRPd9_4 NULL, NULL, 1 | |
1324 | #define FGRPd9_5 NULL, NULL, 2 | |
1325 | #define FGRPd9_6 NULL, NULL, 3 | |
1326 | #define FGRPd9_7 NULL, NULL, 4 | |
1327 | #define FGRPda_5 NULL, NULL, 5 | |
1328 | #define FGRPdb_4 NULL, NULL, 6 | |
1329 | #define FGRPde_3 NULL, NULL, 7 | |
1330 | #define FGRPdf_4 NULL, NULL, 8 | |
1331 | ||
be0c8b05 | 1332 | static struct dis386 float_reg[][8] = { |
5d0734a7 JK |
1333 | /* d8 */ |
1334 | { | |
1335 | { "fadd", ST, STi }, | |
1336 | { "fmul", ST, STi }, | |
1337 | { "fcom", STi }, | |
1338 | { "fcomp", STi }, | |
1339 | { "fsub", ST, STi }, | |
1340 | { "fsubr", ST, STi }, | |
1341 | { "fdiv", ST, STi }, | |
1342 | { "fdivr", ST, STi }, | |
1343 | }, | |
1344 | /* d9 */ | |
1345 | { | |
1346 | { "fld", STi }, | |
1347 | { "fxch", STi }, | |
1348 | { FGRPd9_2 }, | |
1349 | { "(bad)" }, | |
1350 | { FGRPd9_4 }, | |
1351 | { FGRPd9_5 }, | |
1352 | { FGRPd9_6 }, | |
1353 | { FGRPd9_7 }, | |
1354 | }, | |
1355 | /* da */ | |
1356 | { | |
1d935cf6 MM |
1357 | { "fcmovb", ST, STi }, |
1358 | { "fcmove", ST, STi }, | |
1359 | { "fcmovbe",ST, STi }, | |
1360 | { "fcmovu", ST, STi }, | |
5d0734a7 JK |
1361 | { "(bad)" }, |
1362 | { FGRPda_5 }, | |
1363 | { "(bad)" }, | |
1364 | { "(bad)" }, | |
1365 | }, | |
1366 | /* db */ | |
1367 | { | |
1d935cf6 MM |
1368 | { "fcmovnb",ST, STi }, |
1369 | { "fcmovne",ST, STi }, | |
1370 | { "fcmovnbe",ST, STi }, | |
1371 | { "fcmovnu",ST, STi }, | |
5d0734a7 | 1372 | { FGRPdb_4 }, |
1d935cf6 MM |
1373 | { "fucomi", ST, STi }, |
1374 | { "fcomi", ST, STi }, | |
5d0734a7 JK |
1375 | { "(bad)" }, |
1376 | }, | |
1377 | /* dc */ | |
1378 | { | |
1379 | { "fadd", STi, ST }, | |
1380 | { "fmul", STi, ST }, | |
1381 | { "(bad)" }, | |
1382 | { "(bad)" }, | |
1383 | { "fsub", STi, ST }, | |
1384 | { "fsubr", STi, ST }, | |
1385 | { "fdiv", STi, ST }, | |
1386 | { "fdivr", STi, ST }, | |
1387 | }, | |
1388 | /* dd */ | |
1389 | { | |
1390 | { "ffree", STi }, | |
1391 | { "(bad)" }, | |
1392 | { "fst", STi }, | |
1393 | { "fstp", STi }, | |
1394 | { "fucom", STi }, | |
1395 | { "fucomp", STi }, | |
1396 | { "(bad)" }, | |
1397 | { "(bad)" }, | |
1398 | }, | |
1399 | /* de */ | |
1400 | { | |
1401 | { "faddp", STi, ST }, | |
1402 | { "fmulp", STi, ST }, | |
1403 | { "(bad)" }, | |
1404 | { FGRPde_3 }, | |
1405 | { "fsubp", STi, ST }, | |
1406 | { "fsubrp", STi, ST }, | |
1407 | { "fdivp", STi, ST }, | |
1408 | { "fdivrp", STi, ST }, | |
1409 | }, | |
1410 | /* df */ | |
1411 | { | |
1412 | { "(bad)" }, | |
1413 | { "(bad)" }, | |
1414 | { "(bad)" }, | |
1415 | { "(bad)" }, | |
1416 | { FGRPdf_4 }, | |
1d935cf6 MM |
1417 | { "fucomip",ST, STi }, |
1418 | { "fcomip", ST, STi }, | |
5d0734a7 JK |
1419 | { "(bad)" }, |
1420 | }, | |
1421 | }; | |
1422 | ||
1423 | ||
be0c8b05 | 1424 | static char *fgrps[][8] = { |
5d0734a7 JK |
1425 | /* d9_2 0 */ |
1426 | { | |
1427 | "fnop","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)", | |
1428 | }, | |
1429 | ||
1430 | /* d9_4 1 */ | |
1431 | { | |
1432 | "fchs","fabs","(bad)","(bad)","ftst","fxam","(bad)","(bad)", | |
1433 | }, | |
1434 | ||
1435 | /* d9_5 2 */ | |
1436 | { | |
1437 | "fld1","fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz","(bad)", | |
1438 | }, | |
1439 | ||
1440 | /* d9_6 3 */ | |
1441 | { | |
1442 | "f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp","fincstp", | |
1443 | }, | |
1444 | ||
1445 | /* d9_7 4 */ | |
1446 | { | |
1447 | "fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos", | |
1448 | }, | |
1449 | ||
1450 | /* da_5 5 */ | |
1451 | { | |
1452 | "(bad)","fucompp","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)", | |
1453 | }, | |
1454 | ||
1455 | /* db_4 6 */ | |
1456 | { | |
1457 | "feni(287 only)","fdisi(287 only)","fNclex","fNinit", | |
1458 | "fNsetpm(287 only)","(bad)","(bad)","(bad)", | |
1459 | }, | |
1460 | ||
1461 | /* de_3 7 */ | |
1462 | { | |
1463 | "(bad)","fcompp","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)", | |
1464 | }, | |
1465 | ||
1466 | /* df_4 8 */ | |
1467 | { | |
1468 | "fNstsw","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)", | |
1469 | }, | |
1470 | }; | |
1471 | ||
1472 | static void | |
be0c8b05 SG |
1473 | dofloat (aflag, dflag) |
1474 | int aflag; | |
1475 | int dflag; | |
5d0734a7 JK |
1476 | { |
1477 | struct dis386 *dp; | |
1478 | unsigned char floatop; | |
1479 | ||
1480 | floatop = codep[-1]; | |
1481 | ||
1482 | if (mod != 3) | |
1483 | { | |
be0c8b05 | 1484 | putop (float_mem[(floatop - 0xd8) * 8 + reg], aflag, dflag); |
5d0734a7 | 1485 | obufp = op1out; |
be0c8b05 | 1486 | OP_E (v_mode, aflag, dflag); |
5d0734a7 JK |
1487 | return; |
1488 | } | |
1489 | codep++; | |
1490 | ||
1491 | dp = &float_reg[floatop - 0xd8][reg]; | |
1492 | if (dp->name == NULL) | |
1493 | { | |
be0c8b05 | 1494 | putop (fgrps[dp->bytemode1][rm], aflag, dflag); |
5d0734a7 JK |
1495 | /* instruction fnstsw is only one with strange arg */ |
1496 | if (floatop == 0xdf | |
1497 | && FETCH_DATA (the_info, codep + 1) | |
1498 | && *codep == 0xe0) | |
1499 | strcpy (op1out, "%eax"); | |
1500 | } | |
1501 | else | |
1502 | { | |
be0c8b05 | 1503 | putop (dp->name, aflag, dflag); |
5d0734a7 JK |
1504 | obufp = op1out; |
1505 | if (dp->op1) | |
be0c8b05 | 1506 | (*dp->op1)(dp->bytemode1, aflag, dflag); |
5d0734a7 JK |
1507 | obufp = op2out; |
1508 | if (dp->op2) | |
be0c8b05 | 1509 | (*dp->op2)(dp->bytemode2, aflag, dflag); |
5d0734a7 JK |
1510 | } |
1511 | } | |
1512 | ||
1513 | /* ARGSUSED */ | |
be0c8b05 SG |
1514 | static int |
1515 | OP_ST (ignore, aflag, dflag) | |
5d0734a7 | 1516 | int ignore; |
be0c8b05 SG |
1517 | int aflag; |
1518 | int dflag; | |
5d0734a7 JK |
1519 | { |
1520 | oappend ("%st"); | |
1521 | return (0); | |
1522 | } | |
1523 | ||
1524 | /* ARGSUSED */ | |
be0c8b05 SG |
1525 | static int |
1526 | OP_STi (ignore, aflag, dflag) | |
5d0734a7 | 1527 | int ignore; |
be0c8b05 SG |
1528 | int aflag; |
1529 | int dflag; | |
5d0734a7 JK |
1530 | { |
1531 | sprintf (scratchbuf, "%%st(%d)", rm); | |
1532 | oappend (scratchbuf); | |
1533 | return (0); | |
1534 | } | |
1535 | ||
1536 | ||
1537 | /* capital letters in template are macros */ | |
1538 | static void | |
be0c8b05 | 1539 | putop (template, aflag, dflag) |
5d0734a7 | 1540 | char *template; |
be0c8b05 SG |
1541 | int aflag; |
1542 | int dflag; | |
5d0734a7 JK |
1543 | { |
1544 | char *p; | |
1545 | ||
1546 | for (p = template; *p; p++) | |
1547 | { | |
1548 | switch (*p) | |
1549 | { | |
1550 | default: | |
1551 | *obufp++ = *p; | |
1552 | break; | |
1553 | case 'C': /* For jcxz/jecxz */ | |
be0c8b05 | 1554 | if (aflag) |
5d0734a7 JK |
1555 | *obufp++ = 'e'; |
1556 | break; | |
1557 | case 'N': | |
1558 | if ((prefixes & PREFIX_FWAIT) == 0) | |
1559 | *obufp++ = 'n'; | |
1560 | break; | |
1561 | case 'S': | |
1562 | /* operand size flag */ | |
1563 | if (dflag) | |
1564 | *obufp++ = 'l'; | |
1565 | else | |
1566 | *obufp++ = 'w'; | |
1567 | break; | |
1568 | } | |
1569 | } | |
1570 | *obufp = 0; | |
1571 | } | |
1572 | ||
1573 | static void | |
1574 | oappend (s) | |
1575 | char *s; | |
1576 | { | |
1577 | strcpy (obufp, s); | |
1578 | obufp += strlen (s); | |
1579 | *obufp = 0; | |
1580 | } | |
1581 | ||
1582 | static void | |
1583 | append_prefix () | |
1584 | { | |
1585 | if (prefixes & PREFIX_CS) | |
1586 | oappend ("%cs:"); | |
1587 | if (prefixes & PREFIX_DS) | |
1588 | oappend ("%ds:"); | |
1589 | if (prefixes & PREFIX_SS) | |
1590 | oappend ("%ss:"); | |
1591 | if (prefixes & PREFIX_ES) | |
1592 | oappend ("%es:"); | |
1593 | if (prefixes & PREFIX_FS) | |
1594 | oappend ("%fs:"); | |
1595 | if (prefixes & PREFIX_GS) | |
1596 | oappend ("%gs:"); | |
1597 | } | |
1598 | ||
be0c8b05 SG |
1599 | static int |
1600 | OP_indirE (bytemode, aflag, dflag) | |
5d0734a7 | 1601 | int bytemode; |
be0c8b05 SG |
1602 | int aflag; |
1603 | int dflag; | |
5d0734a7 JK |
1604 | { |
1605 | oappend ("*"); | |
be0c8b05 | 1606 | return OP_E (bytemode, aflag, dflag); |
5d0734a7 JK |
1607 | } |
1608 | ||
be0c8b05 SG |
1609 | static int |
1610 | OP_E (bytemode, aflag, dflag) | |
5d0734a7 | 1611 | int bytemode; |
be0c8b05 SG |
1612 | int aflag; |
1613 | int dflag; | |
5d0734a7 JK |
1614 | { |
1615 | int disp; | |
be0c8b05 | 1616 | |
5d0734a7 JK |
1617 | /* skip mod/rm byte */ |
1618 | codep++; | |
be0c8b05 | 1619 | |
5d0734a7 JK |
1620 | if (mod == 3) |
1621 | { | |
1622 | switch (bytemode) | |
1623 | { | |
1624 | case b_mode: | |
1625 | oappend (names8[rm]); | |
1626 | break; | |
1627 | case w_mode: | |
1628 | oappend (names16[rm]); | |
1629 | break; | |
1630 | case v_mode: | |
1631 | if (dflag) | |
1632 | oappend (names32[rm]); | |
1633 | else | |
1634 | oappend (names16[rm]); | |
1635 | break; | |
1636 | default: | |
1637 | oappend ("<bad dis table>"); | |
1638 | break; | |
1639 | } | |
be0c8b05 | 1640 | return 0; |
5d0734a7 | 1641 | } |
be0c8b05 SG |
1642 | |
1643 | disp = 0; | |
5d0734a7 | 1644 | append_prefix (); |
be0c8b05 SG |
1645 | |
1646 | if (aflag) /* 32 bit address mode */ | |
5d0734a7 | 1647 | { |
be0c8b05 SG |
1648 | int havesib; |
1649 | int havebase; | |
1650 | int base; | |
1651 | int index; | |
1652 | int scale; | |
1653 | ||
1654 | havesib = 0; | |
5d0734a7 | 1655 | havebase = 1; |
be0c8b05 SG |
1656 | base = rm; |
1657 | ||
1658 | if (base == 4) | |
1659 | { | |
1660 | havesib = 1; | |
1661 | FETCH_DATA (the_info, codep + 1); | |
1662 | scale = (*codep >> 6) & 3; | |
1663 | index = (*codep >> 3) & 7; | |
1664 | base = *codep & 7; | |
1665 | codep++; | |
1666 | } | |
1667 | ||
1668 | switch (mod) | |
5d0734a7 | 1669 | { |
be0c8b05 SG |
1670 | case 0: |
1671 | if (base == 5) | |
1672 | { | |
1673 | havebase = 0; | |
1674 | disp = get32 (); | |
1675 | } | |
5d0734a7 | 1676 | break; |
be0c8b05 SG |
1677 | case 1: |
1678 | FETCH_DATA (the_info, codep + 1); | |
1679 | disp = *(char *)codep++; | |
5d0734a7 | 1680 | break; |
be0c8b05 SG |
1681 | case 2: |
1682 | disp = get32 (); | |
5d0734a7 JK |
1683 | break; |
1684 | } | |
be0c8b05 SG |
1685 | |
1686 | if (mod != 0 || base == 5) | |
5d0734a7 | 1687 | { |
be0c8b05 SG |
1688 | sprintf (scratchbuf, "0x%x", disp); |
1689 | oappend (scratchbuf); | |
5d0734a7 | 1690 | } |
be0c8b05 SG |
1691 | |
1692 | if (havebase || (havesib && (index != 4 || scale != 0))) | |
5d0734a7 | 1693 | { |
be0c8b05 SG |
1694 | oappend ("("); |
1695 | if (havebase) | |
1696 | oappend (names32[base]); | |
1697 | if (havesib) | |
5d0734a7 | 1698 | { |
be0c8b05 SG |
1699 | if (index != 4) |
1700 | { | |
1701 | sprintf (scratchbuf, ",%s", names32[index]); | |
1702 | oappend (scratchbuf); | |
1703 | } | |
1704 | sprintf (scratchbuf, ",%d", 1 << scale); | |
5d0734a7 JK |
1705 | oappend (scratchbuf); |
1706 | } | |
be0c8b05 SG |
1707 | oappend (")"); |
1708 | } | |
1709 | } | |
1710 | else | |
1711 | { /* 16 bit address mode */ | |
1712 | switch (mod) | |
1713 | { | |
1714 | case 0: | |
1715 | if (rm == 6) | |
1716 | disp = (short) get16 (); | |
1717 | break; | |
1718 | case 1: | |
1719 | FETCH_DATA (the_info, codep + 1); | |
1720 | disp = *(char *)codep++; | |
1721 | break; | |
1722 | case 2: | |
1723 | disp = (short) get16 (); | |
1724 | break; | |
1725 | } | |
1726 | ||
1727 | if (mod != 0 || rm == 6) | |
1728 | { | |
1729 | sprintf (scratchbuf, "0x%x", disp); | |
5d0734a7 JK |
1730 | oappend (scratchbuf); |
1731 | } | |
be0c8b05 SG |
1732 | |
1733 | if (mod != 0 || rm != 6) | |
1734 | { | |
1735 | oappend ("("); | |
1736 | oappend (index16[rm]); | |
1737 | oappend (")"); | |
1738 | } | |
5d0734a7 | 1739 | } |
be0c8b05 | 1740 | return 0; |
5d0734a7 JK |
1741 | } |
1742 | ||
be0c8b05 SG |
1743 | static int |
1744 | OP_G (bytemode, aflag, dflag) | |
5d0734a7 | 1745 | int bytemode; |
be0c8b05 SG |
1746 | int aflag; |
1747 | int dflag; | |
5d0734a7 JK |
1748 | { |
1749 | switch (bytemode) | |
1750 | { | |
1751 | case b_mode: | |
1752 | oappend (names8[reg]); | |
1753 | break; | |
1754 | case w_mode: | |
1755 | oappend (names16[reg]); | |
1756 | break; | |
1757 | case d_mode: | |
1758 | oappend (names32[reg]); | |
1759 | break; | |
1760 | case v_mode: | |
1761 | if (dflag) | |
1762 | oappend (names32[reg]); | |
1763 | else | |
1764 | oappend (names16[reg]); | |
1765 | break; | |
1766 | default: | |
1767 | oappend ("<internal disassembler error>"); | |
1768 | break; | |
1769 | } | |
1770 | return (0); | |
1771 | } | |
1772 | ||
1773 | static int | |
1774 | get32 () | |
1775 | { | |
1776 | int x = 0; | |
1777 | ||
1778 | FETCH_DATA (the_info, codep + 4); | |
1779 | x = *codep++ & 0xff; | |
1780 | x |= (*codep++ & 0xff) << 8; | |
1781 | x |= (*codep++ & 0xff) << 16; | |
1782 | x |= (*codep++ & 0xff) << 24; | |
1783 | return (x); | |
1784 | } | |
1785 | ||
1786 | static int | |
1787 | get16 () | |
1788 | { | |
1789 | int x = 0; | |
1790 | ||
1791 | FETCH_DATA (the_info, codep + 2); | |
1792 | x = *codep++ & 0xff; | |
1793 | x |= (*codep++ & 0xff) << 8; | |
1794 | return (x); | |
1795 | } | |
1796 | ||
1797 | static void | |
1798 | set_op (op) | |
1799 | int op; | |
1800 | { | |
1801 | op_index[op_ad] = op_ad; | |
1802 | op_address[op_ad] = op; | |
1803 | } | |
1804 | ||
be0c8b05 SG |
1805 | static int |
1806 | OP_REG (code, aflag, dflag) | |
5d0734a7 | 1807 | int code; |
be0c8b05 SG |
1808 | int aflag; |
1809 | int dflag; | |
5d0734a7 JK |
1810 | { |
1811 | char *s; | |
1812 | ||
1813 | switch (code) | |
1814 | { | |
1815 | case indir_dx_reg: s = "(%dx)"; break; | |
1816 | case ax_reg: case cx_reg: case dx_reg: case bx_reg: | |
1817 | case sp_reg: case bp_reg: case si_reg: case di_reg: | |
1818 | s = names16[code - ax_reg]; | |
1819 | break; | |
1820 | case es_reg: case ss_reg: case cs_reg: | |
1821 | case ds_reg: case fs_reg: case gs_reg: | |
1822 | s = names_seg[code - es_reg]; | |
1823 | break; | |
1824 | case al_reg: case ah_reg: case cl_reg: case ch_reg: | |
1825 | case dl_reg: case dh_reg: case bl_reg: case bh_reg: | |
1826 | s = names8[code - al_reg]; | |
1827 | break; | |
1828 | case eAX_reg: case eCX_reg: case eDX_reg: case eBX_reg: | |
1829 | case eSP_reg: case eBP_reg: case eSI_reg: case eDI_reg: | |
1830 | if (dflag) | |
1831 | s = names32[code - eAX_reg]; | |
1832 | else | |
1833 | s = names16[code - eAX_reg]; | |
1834 | break; | |
1835 | default: | |
1836 | s = "<internal disassembler error>"; | |
1837 | break; | |
1838 | } | |
1839 | oappend (s); | |
1840 | return (0); | |
1841 | } | |
1842 | ||
be0c8b05 SG |
1843 | static int |
1844 | OP_I (bytemode, aflag, dflag) | |
5d0734a7 | 1845 | int bytemode; |
be0c8b05 SG |
1846 | int aflag; |
1847 | int dflag; | |
5d0734a7 JK |
1848 | { |
1849 | int op; | |
1850 | ||
1851 | switch (bytemode) | |
1852 | { | |
1853 | case b_mode: | |
1854 | FETCH_DATA (the_info, codep + 1); | |
1855 | op = *codep++ & 0xff; | |
1856 | break; | |
1857 | case v_mode: | |
1858 | if (dflag) | |
1859 | op = get32 (); | |
1860 | else | |
1861 | op = get16 (); | |
1862 | break; | |
1863 | case w_mode: | |
1864 | op = get16 (); | |
1865 | break; | |
1866 | default: | |
1867 | oappend ("<internal disassembler error>"); | |
1868 | return (0); | |
1869 | } | |
1870 | sprintf (scratchbuf, "$0x%x", op); | |
1871 | oappend (scratchbuf); | |
1872 | return (0); | |
1873 | } | |
1874 | ||
be0c8b05 SG |
1875 | static int |
1876 | OP_sI (bytemode, aflag, dflag) | |
5d0734a7 | 1877 | int bytemode; |
be0c8b05 SG |
1878 | int aflag; |
1879 | int dflag; | |
5d0734a7 JK |
1880 | { |
1881 | int op; | |
1882 | ||
1883 | switch (bytemode) | |
1884 | { | |
1885 | case b_mode: | |
1886 | FETCH_DATA (the_info, codep + 1); | |
1887 | op = *(char *)codep++; | |
1888 | break; | |
1889 | case v_mode: | |
1890 | if (dflag) | |
1891 | op = get32 (); | |
1892 | else | |
1893 | op = (short)get16(); | |
1894 | break; | |
1895 | case w_mode: | |
1896 | op = (short)get16 (); | |
1897 | break; | |
1898 | default: | |
1899 | oappend ("<internal disassembler error>"); | |
1900 | return (0); | |
1901 | } | |
1902 | sprintf (scratchbuf, "$0x%x", op); | |
1903 | oappend (scratchbuf); | |
1904 | return (0); | |
1905 | } | |
1906 | ||
be0c8b05 SG |
1907 | static int |
1908 | OP_J (bytemode, aflag, dflag) | |
5d0734a7 | 1909 | int bytemode; |
be0c8b05 SG |
1910 | int aflag; |
1911 | int dflag; | |
5d0734a7 JK |
1912 | { |
1913 | int disp; | |
1914 | int mask = -1; | |
1915 | ||
1916 | switch (bytemode) | |
1917 | { | |
1918 | case b_mode: | |
1919 | FETCH_DATA (the_info, codep + 1); | |
1920 | disp = *(char *)codep++; | |
1921 | break; | |
1922 | case v_mode: | |
1923 | if (dflag) | |
1924 | disp = get32 (); | |
1925 | else | |
1926 | { | |
1927 | disp = (short)get16 (); | |
1928 | /* for some reason, a data16 prefix on a jump instruction | |
1929 | means that the pc is masked to 16 bits after the | |
1930 | displacement is added! */ | |
1931 | mask = 0xffff; | |
1932 | } | |
1933 | break; | |
1934 | default: | |
1935 | oappend ("<internal disassembler error>"); | |
1936 | return (0); | |
1937 | } | |
1938 | disp = (start_pc + codep - start_codep + disp) & mask; | |
1939 | set_op (disp); | |
1940 | sprintf (scratchbuf, "0x%x", disp); | |
1941 | oappend (scratchbuf); | |
1942 | return (0); | |
1943 | } | |
1944 | ||
1945 | /* ARGSUSED */ | |
be0c8b05 SG |
1946 | static int |
1947 | OP_SEG (dummy, aflag, dflag) | |
5d0734a7 | 1948 | int dummy; |
be0c8b05 SG |
1949 | int aflag; |
1950 | int dflag; | |
5d0734a7 JK |
1951 | { |
1952 | static char *sreg[] = { | |
1953 | "%es","%cs","%ss","%ds","%fs","%gs","%?","%?", | |
1954 | }; | |
1955 | ||
1956 | oappend (sreg[reg]); | |
1957 | return (0); | |
1958 | } | |
1959 | ||
be0c8b05 SG |
1960 | static int |
1961 | OP_DIR (size, aflag, dflag) | |
5d0734a7 | 1962 | int size; |
be0c8b05 SG |
1963 | int aflag; |
1964 | int dflag; | |
5d0734a7 JK |
1965 | { |
1966 | int seg, offset; | |
1967 | ||
1968 | switch (size) | |
1969 | { | |
1970 | case lptr: | |
1971 | if (aflag) | |
1972 | { | |
1973 | offset = get32 (); | |
1974 | seg = get16 (); | |
1975 | } | |
1976 | else | |
1977 | { | |
1978 | offset = get16 (); | |
1979 | seg = get16 (); | |
1980 | } | |
1981 | sprintf (scratchbuf, "0x%x,0x%x", seg, offset); | |
1982 | oappend (scratchbuf); | |
1983 | break; | |
1984 | case v_mode: | |
1985 | if (aflag) | |
1986 | offset = get32 (); | |
1987 | else | |
1988 | offset = (short)get16 (); | |
1989 | ||
1990 | offset = start_pc + codep - start_codep + offset; | |
1991 | set_op (offset); | |
1992 | sprintf (scratchbuf, "0x%x", offset); | |
1993 | oappend (scratchbuf); | |
1994 | break; | |
1995 | default: | |
1996 | oappend ("<internal disassembler error>"); | |
1997 | break; | |
1998 | } | |
1999 | return (0); | |
2000 | } | |
2001 | ||
2002 | /* ARGSUSED */ | |
be0c8b05 SG |
2003 | static int |
2004 | OP_OFF (bytemode, aflag, dflag) | |
5d0734a7 | 2005 | int bytemode; |
be0c8b05 SG |
2006 | int aflag; |
2007 | int dflag; | |
5d0734a7 JK |
2008 | { |
2009 | int off; | |
be0c8b05 SG |
2010 | |
2011 | append_prefix (); | |
2012 | ||
5d0734a7 JK |
2013 | if (aflag) |
2014 | off = get32 (); | |
2015 | else | |
2016 | off = get16 (); | |
2017 | ||
2018 | sprintf (scratchbuf, "0x%x", off); | |
2019 | oappend (scratchbuf); | |
2020 | return (0); | |
2021 | } | |
2022 | ||
2023 | /* ARGSUSED */ | |
be0c8b05 SG |
2024 | static int |
2025 | OP_ESDI (dummy, aflag, dflag) | |
2026 | int dummy; | |
2027 | int aflag; | |
2028 | int dflag; | |
5d0734a7 JK |
2029 | { |
2030 | oappend ("%es:("); | |
2031 | oappend (aflag ? "%edi" : "%di"); | |
2032 | oappend (")"); | |
2033 | return (0); | |
2034 | } | |
2035 | ||
2036 | /* ARGSUSED */ | |
be0c8b05 SG |
2037 | static int |
2038 | OP_DSSI (dummy, aflag, dflag) | |
2039 | int dummy; | |
2040 | int aflag; | |
2041 | int dflag; | |
5d0734a7 JK |
2042 | { |
2043 | oappend ("%ds:("); | |
2044 | oappend (aflag ? "%esi" : "%si"); | |
2045 | oappend (")"); | |
2046 | return (0); | |
2047 | } | |
2048 | ||
41b96d55 ILT |
2049 | #if 0 |
2050 | /* Not used. */ | |
2051 | ||
5d0734a7 | 2052 | /* ARGSUSED */ |
be0c8b05 SG |
2053 | static int |
2054 | OP_ONE (dummy, aflag, dflag) | |
2055 | int dummy; | |
2056 | int aflag; | |
2057 | int dflag; | |
5d0734a7 JK |
2058 | { |
2059 | oappend ("1"); | |
2060 | return (0); | |
2061 | } | |
2062 | ||
41b96d55 ILT |
2063 | #endif |
2064 | ||
5d0734a7 | 2065 | /* ARGSUSED */ |
be0c8b05 SG |
2066 | static int |
2067 | OP_C (dummy, aflag, dflag) | |
2068 | int dummy; | |
2069 | int aflag; | |
2070 | int dflag; | |
5d0734a7 JK |
2071 | { |
2072 | codep++; /* skip mod/rm */ | |
2073 | sprintf (scratchbuf, "%%cr%d", reg); | |
2074 | oappend (scratchbuf); | |
2075 | return (0); | |
2076 | } | |
2077 | ||
2078 | /* ARGSUSED */ | |
be0c8b05 SG |
2079 | static int |
2080 | OP_D (dummy, aflag, dflag) | |
2081 | int dummy; | |
2082 | int aflag; | |
2083 | int dflag; | |
5d0734a7 JK |
2084 | { |
2085 | codep++; /* skip mod/rm */ | |
2086 | sprintf (scratchbuf, "%%db%d", reg); | |
2087 | oappend (scratchbuf); | |
2088 | return (0); | |
2089 | } | |
2090 | ||
2091 | /* ARGSUSED */ | |
be0c8b05 SG |
2092 | static int |
2093 | OP_T (dummy, aflag, dflag) | |
5d0734a7 | 2094 | int dummy; |
be0c8b05 SG |
2095 | int aflag; |
2096 | int dflag; | |
5d0734a7 JK |
2097 | { |
2098 | codep++; /* skip mod/rm */ | |
2099 | sprintf (scratchbuf, "%%tr%d", reg); | |
2100 | oappend (scratchbuf); | |
2101 | return (0); | |
2102 | } | |
2103 | ||
be0c8b05 SG |
2104 | static int |
2105 | OP_rm (bytemode, aflag, dflag) | |
5d0734a7 | 2106 | int bytemode; |
be0c8b05 SG |
2107 | int aflag; |
2108 | int dflag; | |
5d0734a7 JK |
2109 | { |
2110 | switch (bytemode) | |
2111 | { | |
2112 | case d_mode: | |
2113 | oappend (names32[rm]); | |
2114 | break; | |
2115 | case w_mode: | |
2116 | oappend (names16[rm]); | |
2117 | break; | |
2118 | } | |
2119 | return (0); | |
2120 | } |