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improve behaviour under VPC, fixes from nicolas tittley.
[minix.git] / commands / swifi / db_disasm.c
blob953cfbfafe7d5341aa853b9d345b320e453ac611
1 /*
2 * Mach Operating System
3 * Copyright (c) 1991,1990 Carnegie Mellon University
4 * All Rights Reserved.
5 *
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the
9 * software, derivative works or modified versions, and any portions
10 * thereof, and that both notices appear in supporting documentation.
11 *
12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15 *
16 * Carnegie Mellon requests users of this software to return to
17 *
18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
19 * School of Computer Science
20 * Carnegie Mellon University
21 * Pittsburgh PA 15213-3890
22 *
23 * any improvements or extensions that they make and grant Carnegie the
24 * rights to redistribute these changes.
25 *
26 * $Id: db_disasm.c,v 1.1 2003/01/15 21:50:58 mikesw Exp $
27 */
28
29 /*
30 * Instruction disassembler.
31 */
32
33 #if 0
34 #include <linux/kernel.h>
35 #endif
36 #include "ddb.h"
37
38 #include "db_access.h"
39 #include "db_sym.h"
40
41 /*
42 * Size attributes
43 */
44 #define BYTE 0
45 #define WORD 1
46 #define LONG 2
47 #define QUAD 3
48 #define SNGL 4
49 #define DBLR 5
50 #define EXTR 6
51 #define SDEP 7
52 #define NONE 8
53
54 /*
55 * Addressing modes
56 */
57 #define E 1 /* general effective address */
58 #define Eind 2 /* indirect address (jump, call) */
59 #define Ew 3 /* address, word size */
60 #define Eb 4 /* address, byte size */
61 #define R 5 /* register, in 'reg' field */
62 #define Rw 6 /* word register, in 'reg' field */
63 #define Ri 7 /* register in instruction */
64 #define S 8 /* segment reg, in 'reg' field */
65 #define Si 9 /* segment reg, in instruction */
66 #define A 10 /* accumulator */
67 #define BX 11 /* (bx) */
68 #define CL 12 /* cl, for shifts */
69 #define DX 13 /* dx, for IO */
70 #define SI 14 /* si */
71 #define DI 15 /* di */
72 #define CR 16 /* control register */
73 #define DR 17 /* debug register */
74 #define TR 18 /* test register */
75 #define I 19 /* immediate, unsigned */
76 #define Is 20 /* immediate, signed */
77 #define Ib 21 /* byte immediate, unsigned */
78 #define Ibs 22 /* byte immediate, signed */
79 #define Iw 23 /* word immediate, unsigned */
80 #define O 25 /* direct address */
81 #define Db 26 /* byte displacement from EIP */
82 #define Dl 27 /* long displacement from EIP */
83 #define o1 28 /* constant 1 */
84 #define o3 29 /* constant 3 */
85 #define OS 30 /* immediate offset/segment */
86 #define ST 31 /* FP stack top */
87 #define STI 32 /* FP stack */
88 #define X 33 /* extended FP op */
89 #define XA 34 /* for 'fstcw %ax' */
90 #define El 35 /* address, long size */
91 #define Ril 36 /* long register in instruction */
92 #define Iba 37 /* byte immediate, don't print if 0xa */
93
94 struct inst {
95 const char * i_name; /* name */
96 short i_has_modrm; /* has regmodrm byte */
97 short i_size; /* operand size */
98 int i_mode; /* addressing modes */
99 const void * i_extra; /* pointer to extra opcode table */
100 };
101
102 #define op1(x) (x)
103 #define op2(x,y) ((x)|((y)<<8))
104 #define op3(x,y,z) ((x)|((y)<<8)|((z)<<16))
105
106 struct finst {
107 const char * f_name; /* name for memory instruction */
108 int f_size; /* size for memory instruction */
109 int f_rrmode; /* mode for rr instruction */
110 const void * f_rrname; /* name for rr instruction
111 (or pointer to table) */
112 };
113
114 static const char * const db_Grp6[] = {
115 "sldt",
116 "str",
117 "lldt",
118 "ltr",
119 "verr",
120 "verw",
121 "",
122 ""
123 };
124
125 static const char * const db_Grp7[] = {
126 "sgdt",
127 "sidt",
128 "lgdt",
129 "lidt",
130 "smsw",
131 "",
132 "lmsw",
133 "invlpg"
134 };
135
136 static const char * const db_Grp8[] = {
137 "",
138 "",
139 "",
140 "",
141 "bt",
142 "bts",
143 "btr",
144 "btc"
145 };
146
147 static const char * const db_Grp9[] = {
148 "",
149 "cmpxchg8b",
150 "",
151 "",
152 "",
153 "",
154 "",
155 ""
156 };
157
158 static const struct inst db_inst_0f0x[] = {
159 /*00*/ { "", TRUE, NONE, op1(Ew), db_Grp6 },
160 /*01*/ { "", TRUE, NONE, op1(Ew), db_Grp7 },
161 /*02*/ { "lar", TRUE, LONG, op2(E,R), 0 },
162 /*03*/ { "lsl", TRUE, LONG, op2(E,R), 0 },
163 /*04*/ { "", FALSE, NONE, 0, 0 },
164 /*05*/ { "", FALSE, NONE, 0, 0 },
165 /*06*/ { "clts", FALSE, NONE, 0, 0 },
166 /*07*/ { "", FALSE, NONE, 0, 0 },
167
168 /*08*/ { "invd", FALSE, NONE, 0, 0 },
169 /*09*/ { "wbinvd",FALSE, NONE, 0, 0 },
170 /*0a*/ { "", FALSE, NONE, 0, 0 },
171 /*0b*/ { "", FALSE, NONE, 0, 0 },
172 /*0c*/ { "", FALSE, NONE, 0, 0 },
173 /*0d*/ { "", FALSE, NONE, 0, 0 },
174 /*0e*/ { "", FALSE, NONE, 0, 0 },
175 /*0f*/ { "", FALSE, NONE, 0, 0 },
176 };
177
178 static const struct inst db_inst_0f2x[] = {
179 /*20*/ { "mov", TRUE, LONG, op2(CR,El), 0 },
180 /*21*/ { "mov", TRUE, LONG, op2(DR,El), 0 },
181 /*22*/ { "mov", TRUE, LONG, op2(El,CR), 0 },
182 /*23*/ { "mov", TRUE, LONG, op2(El,DR), 0 },
183 /*24*/ { "mov", TRUE, LONG, op2(TR,El), 0 },
184 /*25*/ { "", FALSE, NONE, 0, 0 },
185 /*26*/ { "mov", TRUE, LONG, op2(El,TR), 0 },
186 /*27*/ { "", FALSE, NONE, 0, 0 },
187
188 /*28*/ { "", FALSE, NONE, 0, 0 },
189 /*29*/ { "", FALSE, NONE, 0, 0 },
190 /*2a*/ { "", FALSE, NONE, 0, 0 },
191 /*2b*/ { "", FALSE, NONE, 0, 0 },
192 /*2c*/ { "", FALSE, NONE, 0, 0 },
193 /*2d*/ { "", FALSE, NONE, 0, 0 },
194 /*2e*/ { "", FALSE, NONE, 0, 0 },
195 /*2f*/ { "", FALSE, NONE, 0, 0 },
196 };
197
198 static const struct inst db_inst_0f3x[] = {
199 /*30*/ { "wrmsr", FALSE, NONE, 0, 0 },
200 /*31*/ { "rdtsc", FALSE, NONE, 0, 0 },
201 /*32*/ { "rdmsr", FALSE, NONE, 0, 0 },
202 /*33*/ { "rdpmc", FALSE, NONE, 0, 0 },
203 /*34*/ { "", FALSE, NONE, 0, 0 },
204 /*35*/ { "", FALSE, NONE, 0, 0 },
205 /*36*/ { "", FALSE, NONE, 0, 0 },
206 /*37*/ { "", FALSE, NONE, 0, 0 },
207
208 /*38*/ { "", FALSE, NONE, 0, 0 },
209 /*39*/ { "", FALSE, NONE, 0, 0 },
210 /*3a*/ { "", FALSE, NONE, 0, 0 },
211 /*3b*/ { "", FALSE, NONE, 0, 0 },
212 /*3c*/ { "", FALSE, NONE, 0, 0 },
213 /*3d*/ { "", FALSE, NONE, 0, 0 },
214 /*3e*/ { "", FALSE, NONE, 0, 0 },
215 /*3f*/ { "", FALSE, NONE, 0, 0 },
216 };
217
218 static const struct inst db_inst_0f8x[] = {
219 /*80*/ { "jo", FALSE, NONE, op1(Dl), 0 },
220 /*81*/ { "jno", FALSE, NONE, op1(Dl), 0 },
221 /*82*/ { "jb", FALSE, NONE, op1(Dl), 0 },
222 /*83*/ { "jnb", FALSE, NONE, op1(Dl), 0 },
223 /*84*/ { "jz", FALSE, NONE, op1(Dl), 0 },
224 /*85*/ { "jnz", FALSE, NONE, op1(Dl), 0 },
225 /*86*/ { "jbe", FALSE, NONE, op1(Dl), 0 },
226 /*87*/ { "jnbe", FALSE, NONE, op1(Dl), 0 },
227
228 /*88*/ { "js", FALSE, NONE, op1(Dl), 0 },
229 /*89*/ { "jns", FALSE, NONE, op1(Dl), 0 },
230 /*8a*/ { "jp", FALSE, NONE, op1(Dl), 0 },
231 /*8b*/ { "jnp", FALSE, NONE, op1(Dl), 0 },
232 /*8c*/ { "jl", FALSE, NONE, op1(Dl), 0 },
233 /*8d*/ { "jnl", FALSE, NONE, op1(Dl), 0 },
234 /*8e*/ { "jle", FALSE, NONE, op1(Dl), 0 },
235 /*8f*/ { "jnle", FALSE, NONE, op1(Dl), 0 },
236 };
237
238 static const struct inst db_inst_0f9x[] = {
239 /*90*/ { "seto", TRUE, NONE, op1(Eb), 0 },
240 /*91*/ { "setno", TRUE, NONE, op1(Eb), 0 },
241 /*92*/ { "setb", TRUE, NONE, op1(Eb), 0 },
242 /*93*/ { "setnb", TRUE, NONE, op1(Eb), 0 },
243 /*94*/ { "setz", TRUE, NONE, op1(Eb), 0 },
244 /*95*/ { "setnz", TRUE, NONE, op1(Eb), 0 },
245 /*96*/ { "setbe", TRUE, NONE, op1(Eb), 0 },
246 /*97*/ { "setnbe",TRUE, NONE, op1(Eb), 0 },
247
248 /*98*/ { "sets", TRUE, NONE, op1(Eb), 0 },
249 /*99*/ { "setns", TRUE, NONE, op1(Eb), 0 },
250 /*9a*/ { "setp", TRUE, NONE, op1(Eb), 0 },
251 /*9b*/ { "setnp", TRUE, NONE, op1(Eb), 0 },
252 /*9c*/ { "setl", TRUE, NONE, op1(Eb), 0 },
253 /*9d*/ { "setnl", TRUE, NONE, op1(Eb), 0 },
254 /*9e*/ { "setle", TRUE, NONE, op1(Eb), 0 },
255 /*9f*/ { "setnle",TRUE, NONE, op1(Eb), 0 },
256 };
257
258 static const struct inst db_inst_0fax[] = {
259 /*a0*/ { "push", FALSE, NONE, op1(Si), 0 },
260 /*a1*/ { "pop", FALSE, NONE, op1(Si), 0 },
261 /*a2*/ { "cpuid", FALSE, NONE, 0, 0 },
262 /*a3*/ { "bt", TRUE, LONG, op2(R,E), 0 },
263 /*a4*/ { "shld", TRUE, LONG, op3(Ib,R,E), 0 },
264 /*a5*/ { "shld", TRUE, LONG, op3(CL,R,E), 0 },
265 /*a6*/ { "", FALSE, NONE, 0, 0 },
266 /*a7*/ { "", FALSE, NONE, 0, 0 },
267
268 /*a8*/ { "push", FALSE, NONE, op1(Si), 0 },
269 /*a9*/ { "pop", FALSE, NONE, op1(Si), 0 },
270 /*aa*/ { "rsm", FALSE, NONE, 0, 0 },
271 /*ab*/ { "bts", TRUE, LONG, op2(R,E), 0 },
272 /*ac*/ { "shrd", TRUE, LONG, op3(Ib,R,E), 0 },
273 /*ad*/ { "shrd", TRUE, LONG, op3(CL,R,E), 0 },
274 /*a6*/ { "", FALSE, NONE, 0, 0 },
275 /*a7*/ { "imul", TRUE, LONG, op2(E,R), 0 },
276 };
277
278 static const struct inst db_inst_0fbx[] = {
279 /*b0*/ { "cmpxchg",TRUE, BYTE, op2(R, E), 0 },
280 /*b0*/ { "cmpxchg",TRUE, LONG, op2(R, E), 0 },
281 /*b2*/ { "lss", TRUE, LONG, op2(E, R), 0 },
282 /*b3*/ { "btr", TRUE, LONG, op2(R, E), 0 },
283 /*b4*/ { "lfs", TRUE, LONG, op2(E, R), 0 },
284 /*b5*/ { "lgs", TRUE, LONG, op2(E, R), 0 },
285 /*b6*/ { "movzb", TRUE, LONG, op2(Eb, R), 0 },
286 /*b7*/ { "movzw", TRUE, LONG, op2(Ew, R), 0 },
287
288 /*b8*/ { "", FALSE, NONE, 0, 0 },
289 /*b9*/ { "", FALSE, NONE, 0, 0 },
290 /*ba*/ { "", TRUE, LONG, op2(Ib, E), db_Grp8 },
291 /*bb*/ { "btc", TRUE, LONG, op2(R, E), 0 },
292 /*bc*/ { "bsf", TRUE, LONG, op2(E, R), 0 },
293 /*bd*/ { "bsr", TRUE, LONG, op2(E, R), 0 },
294 /*be*/ { "movsb", TRUE, LONG, op2(Eb, R), 0 },
295 /*bf*/ { "movsw", TRUE, LONG, op2(Ew, R), 0 },
296 };
297
298 static const struct inst db_inst_0fcx[] = {
299 /*c0*/ { "xadd", TRUE, BYTE, op2(R, E), 0 },
300 /*c1*/ { "xadd", TRUE, LONG, op2(R, E), 0 },
301 /*c2*/ { "", FALSE, NONE, 0, 0 },
302 /*c3*/ { "", FALSE, NONE, 0, 0 },
303 /*c4*/ { "", FALSE, NONE, 0, 0 },
304 /*c5*/ { "", FALSE, NONE, 0, 0 },
305 /*c6*/ { "", FALSE, NONE, 0, 0 },
306 /*c7*/ { "", TRUE, NONE, op1(E), db_Grp9 },
307 /*c8*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
308 /*c9*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
309 /*ca*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
310 /*cb*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
311 /*cc*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
312 /*cd*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
313 /*ce*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
314 /*cf*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
315 };
316
317 static const struct inst * const db_inst_0f[] = {
318 db_inst_0f0x,
319 0,
320 db_inst_0f2x,
321 db_inst_0f3x,
322 0,
323 0,
324 0,
325 0,
326 db_inst_0f8x,
327 db_inst_0f9x,
328 db_inst_0fax,
329 db_inst_0fbx,
330 db_inst_0fcx,
331 0,
332 0,
333 0
334 };
335
336 static const char * const db_Esc92[] = {
337 "fnop", "", "", "", "", "", "", ""
338 };
339 static const char * const db_Esc94[] = {
340 "fchs", "fabs", "", "", "ftst", "fxam", "", ""
341 };
342 static const char * const db_Esc95[] = {
343 "fld1", "fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz",""
344 };
345 static const char * const db_Esc96[] = {
346 "f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp",
347 "fincstp"
348 };
349 static const char * const db_Esc97[] = {
350 "fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos"
351 };
352
353 static const char * const db_Esca5[] = {
354 "", "fucompp","", "", "", "", "", ""
355 };
356
357 static const char * const db_Escb4[] = {
358 "fneni","fndisi", "fnclex","fninit","fsetpm", "", "", ""
359 };
360
361 static const char * const db_Esce3[] = {
362 "", "fcompp","", "", "", "", "", ""
363 };
364
365 static const char * const db_Escf4[] = {
366 "fnstsw","", "", "", "", "", "", ""
367 };
368
369 static const struct finst db_Esc8[] = {
370 /*0*/ { "fadd", SNGL, op2(STI,ST), 0 },
371 /*1*/ { "fmul", SNGL, op2(STI,ST), 0 },
372 /*2*/ { "fcom", SNGL, op2(STI,ST), 0 },
373 /*3*/ { "fcomp", SNGL, op2(STI,ST), 0 },
374 /*4*/ { "fsub", SNGL, op2(STI,ST), 0 },
375 /*5*/ { "fsubr", SNGL, op2(STI,ST), 0 },
376 /*6*/ { "fdiv", SNGL, op2(STI,ST), 0 },
377 /*7*/ { "fdivr", SNGL, op2(STI,ST), 0 },
378 };
379
380 static const struct finst db_Esc9[] = {
381 /*0*/ { "fld", SNGL, op1(STI), 0 },
382 /*1*/ { "", NONE, op1(STI), "fxch" },
383 /*2*/ { "fst", SNGL, op1(X), db_Esc92 },
384 /*3*/ { "fstp", SNGL, 0, 0 },
385 /*4*/ { "fldenv", NONE, op1(X), db_Esc94 },
386 /*5*/ { "fldcw", NONE, op1(X), db_Esc95 },
387 /*6*/ { "fnstenv",NONE, op1(X), db_Esc96 },
388 /*7*/ { "fnstcw", NONE, op1(X), db_Esc97 },
389 };
390
391 static const struct finst db_Esca[] = {
392 /*0*/ { "fiadd", LONG, 0, 0 },
393 /*1*/ { "fimul", LONG, 0, 0 },
394 /*2*/ { "ficom", LONG, 0, 0 },
395 /*3*/ { "ficomp", LONG, 0, 0 },
396 /*4*/ { "fisub", LONG, 0, 0 },
397 /*5*/ { "fisubr", LONG, op1(X), db_Esca5 },
398 /*6*/ { "fidiv", LONG, 0, 0 },
399 /*7*/ { "fidivr", LONG, 0, 0 }
400 };
401
402 static const struct finst db_Escb[] = {
403 /*0*/ { "fild", LONG, 0, 0 },
404 /*1*/ { "", NONE, 0, 0 },
405 /*2*/ { "fist", LONG, 0, 0 },
406 /*3*/ { "fistp", LONG, 0, 0 },
407 /*4*/ { "", WORD, op1(X), db_Escb4 },
408 /*5*/ { "fld", EXTR, 0, 0 },
409 /*6*/ { "", WORD, 0, 0 },
410 /*7*/ { "fstp", EXTR, 0, 0 },
411 };
412
413 static const struct finst db_Escc[] = {
414 /*0*/ { "fadd", DBLR, op2(ST,STI), 0 },
415 /*1*/ { "fmul", DBLR, op2(ST,STI), 0 },
416 /*2*/ { "fcom", DBLR, 0, 0 },
417 /*3*/ { "fcomp", DBLR, 0, 0 },
418 /*4*/ { "fsub", DBLR, op2(ST,STI), "fsubr" },
419 /*5*/ { "fsubr", DBLR, op2(ST,STI), "fsub" },
420 /*6*/ { "fdiv", DBLR, op2(ST,STI), "fdivr" },
421 /*7*/ { "fdivr", DBLR, op2(ST,STI), "fdiv" },
422 };
423
424 static const struct finst db_Escd[] = {
425 /*0*/ { "fld", DBLR, op1(STI), "ffree" },
426 /*1*/ { "", NONE, 0, 0 },
427 /*2*/ { "fst", DBLR, op1(STI), 0 },
428 /*3*/ { "fstp", DBLR, op1(STI), 0 },
429 /*4*/ { "frstor", NONE, op1(STI), "fucom" },
430 /*5*/ { "", NONE, op1(STI), "fucomp" },
431 /*6*/ { "fnsave", NONE, 0, 0 },
432 /*7*/ { "fnstsw", NONE, 0, 0 },
433 };
434
435 static const struct finst db_Esce[] = {
436 /*0*/ { "fiadd", WORD, op2(ST,STI), "faddp" },
437 /*1*/ { "fimul", WORD, op2(ST,STI), "fmulp" },
438 /*2*/ { "ficom", WORD, 0, 0 },
439 /*3*/ { "ficomp", WORD, op1(X), db_Esce3 },
440 /*4*/ { "fisub", WORD, op2(ST,STI), "fsubrp" },
441 /*5*/ { "fisubr", WORD, op2(ST,STI), "fsubp" },
442 /*6*/ { "fidiv", WORD, op2(ST,STI), "fdivrp" },
443 /*7*/ { "fidivr", WORD, op2(ST,STI), "fdivp" },
444 };
445
446 static const struct finst db_Escf[] = {
447 /*0*/ { "fild", WORD, 0, 0 },
448 /*1*/ { "", NONE, 0, 0 },
449 /*2*/ { "fist", WORD, 0, 0 },
450 /*3*/ { "fistp", WORD, 0, 0 },
451 /*4*/ { "fbld", NONE, op1(XA), db_Escf4 },
452 /*5*/ { "fild", QUAD, 0, 0 },
453 /*6*/ { "fbstp", NONE, 0, 0 },
454 /*7*/ { "fistp", QUAD, 0, 0 },
455 };
456
457 static const struct finst * const db_Esc_inst[] = {
458 db_Esc8, db_Esc9, db_Esca, db_Escb,
459 db_Escc, db_Escd, db_Esce, db_Escf
460 };
461
462 static const char * const db_Grp1[] = {
463 "add",
464 "or",
465 "adc",
466 "sbb",
467 "and",
468 "sub",
469 "xor",
470 "cmp"
471 };
472
473 static const char * const db_Grp2[] = {
474 "rol",
475 "ror",
476 "rcl",
477 "rcr",
478 "shl",
479 "shr",
480 "shl",
481 "sar"
482 };
483
484 static const struct inst db_Grp3[] = {
485 { "test", TRUE, NONE, op2(I,E), 0 },
486 { "test", TRUE, NONE, op2(I,E), 0 },
487 { "not", TRUE, NONE, op1(E), 0 },
488 { "neg", TRUE, NONE, op1(E), 0 },
489 { "mul", TRUE, NONE, op2(E,A), 0 },
490 { "imul", TRUE, NONE, op2(E,A), 0 },
491 { "div", TRUE, NONE, op2(E,A), 0 },
492 { "idiv", TRUE, NONE, op2(E,A), 0 },
493 };
494
495 static const struct inst db_Grp4[] = {
496 { "inc", TRUE, BYTE, op1(E), 0 },
497 { "dec", TRUE, BYTE, op1(E), 0 },
498 { "", TRUE, NONE, 0, 0 },
499 { "", TRUE, NONE, 0, 0 },
500 { "", TRUE, NONE, 0, 0 },
501 { "", TRUE, NONE, 0, 0 },
502 { "", TRUE, NONE, 0, 0 },
503 { "", TRUE, NONE, 0, 0 }
504 };
505
506 static const struct inst db_Grp5[] = {
507 { "inc", TRUE, LONG, op1(E), 0 },
508 { "dec", TRUE, LONG, op1(E), 0 },
509 { "call", TRUE, LONG, op1(Eind),0 },
510 { "lcall", TRUE, LONG, op1(Eind),0 },
511 { "jmp", TRUE, LONG, op1(Eind),0 },
512 { "ljmp", TRUE, LONG, op1(Eind),0 },
513 { "push", TRUE, LONG, op1(E), 0 },
514 { "", TRUE, NONE, 0, 0 }
515 };
516
517 static const struct inst db_inst_table[256] = {
518 /*00*/ { "add", TRUE, BYTE, op2(R, E), 0 },
519 /*01*/ { "add", TRUE, LONG, op2(R, E), 0 },
520 /*02*/ { "add", TRUE, BYTE, op2(E, R), 0 },
521 /*03*/ { "add", TRUE, LONG, op2(E, R), 0 },
522 /*04*/ { "add", FALSE, BYTE, op2(I, A), 0 },
523 /*05*/ { "add", FALSE, LONG, op2(Is, A), 0 },
524 /*06*/ { "push", FALSE, NONE, op1(Si), 0 },
525 /*07*/ { "pop", FALSE, NONE, op1(Si), 0 },
526
527 /*08*/ { "or", TRUE, BYTE, op2(R, E), 0 },
528 /*09*/ { "or", TRUE, LONG, op2(R, E), 0 },
529 /*0a*/ { "or", TRUE, BYTE, op2(E, R), 0 },
530 /*0b*/ { "or", TRUE, LONG, op2(E, R), 0 },
531 /*0c*/ { "or", FALSE, BYTE, op2(I, A), 0 },
532 /*0d*/ { "or", FALSE, LONG, op2(I, A), 0 },
533 /*0e*/ { "push", FALSE, NONE, op1(Si), 0 },
534 /*0f*/ { "", FALSE, NONE, 0, 0 },
535
536 /*10*/ { "adc", TRUE, BYTE, op2(R, E), 0 },
537 /*11*/ { "adc", TRUE, LONG, op2(R, E), 0 },
538 /*12*/ { "adc", TRUE, BYTE, op2(E, R), 0 },
539 /*13*/ { "adc", TRUE, LONG, op2(E, R), 0 },
540 /*14*/ { "adc", FALSE, BYTE, op2(I, A), 0 },
541 /*15*/ { "adc", FALSE, LONG, op2(Is, A), 0 },
542 /*16*/ { "push", FALSE, NONE, op1(Si), 0 },
543 /*17*/ { "pop", FALSE, NONE, op1(Si), 0 },
544
545 /*18*/ { "sbb", TRUE, BYTE, op2(R, E), 0 },
546 /*19*/ { "sbb", TRUE, LONG, op2(R, E), 0 },
547 /*1a*/ { "sbb", TRUE, BYTE, op2(E, R), 0 },
548 /*1b*/ { "sbb", TRUE, LONG, op2(E, R), 0 },
549 /*1c*/ { "sbb", FALSE, BYTE, op2(I, A), 0 },
550 /*1d*/ { "sbb", FALSE, LONG, op2(Is, A), 0 },
551 /*1e*/ { "push", FALSE, NONE, op1(Si), 0 },
552 /*1f*/ { "pop", FALSE, NONE, op1(Si), 0 },
553
554 /*20*/ { "and", TRUE, BYTE, op2(R, E), 0 },
555 /*21*/ { "and", TRUE, LONG, op2(R, E), 0 },
556 /*22*/ { "and", TRUE, BYTE, op2(E, R), 0 },
557 /*23*/ { "and", TRUE, LONG, op2(E, R), 0 },
558 /*24*/ { "and", FALSE, BYTE, op2(I, A), 0 },
559 /*25*/ { "and", FALSE, LONG, op2(I, A), 0 },
560 /*26*/ { "", FALSE, NONE, 0, 0 },
561 /*27*/ { "daa", FALSE, NONE, 0, 0 },
562
563 /*28*/ { "sub", TRUE, BYTE, op2(R, E), 0 },
564 /*29*/ { "sub", TRUE, LONG, op2(R, E), 0 },
565 /*2a*/ { "sub", TRUE, BYTE, op2(E, R), 0 },
566 /*2b*/ { "sub", TRUE, LONG, op2(E, R), 0 },
567 /*2c*/ { "sub", FALSE, BYTE, op2(I, A), 0 },
568 /*2d*/ { "sub", FALSE, LONG, op2(Is, A), 0 },
569 /*2e*/ { "", FALSE, NONE, 0, 0 },
570 /*2f*/ { "das", FALSE, NONE, 0, 0 },
571
572 /*30*/ { "xor", TRUE, BYTE, op2(R, E), 0 },
573 /*31*/ { "xor", TRUE, LONG, op2(R, E), 0 },
574 /*32*/ { "xor", TRUE, BYTE, op2(E, R), 0 },
575 /*33*/ { "xor", TRUE, LONG, op2(E, R), 0 },
576 /*34*/ { "xor", FALSE, BYTE, op2(I, A), 0 },
577 /*35*/ { "xor", FALSE, LONG, op2(I, A), 0 },
578 /*36*/ { "", FALSE, NONE, 0, 0 },
579 /*37*/ { "aaa", FALSE, NONE, 0, 0 },
580
581 /*38*/ { "cmp", TRUE, BYTE, op2(R, E), 0 },
582 /*39*/ { "cmp", TRUE, LONG, op2(R, E), 0 },
583 /*3a*/ { "cmp", TRUE, BYTE, op2(E, R), 0 },
584 /*3b*/ { "cmp", TRUE, LONG, op2(E, R), 0 },
585 /*3c*/ { "cmp", FALSE, BYTE, op2(I, A), 0 },
586 /*3d*/ { "cmp", FALSE, LONG, op2(Is, A), 0 },
587 /*3e*/ { "", FALSE, NONE, 0, 0 },
588 /*3f*/ { "aas", FALSE, NONE, 0, 0 },
589
590 /*40*/ { "inc", FALSE, LONG, op1(Ri), 0 },
591 /*41*/ { "inc", FALSE, LONG, op1(Ri), 0 },
592 /*42*/ { "inc", FALSE, LONG, op1(Ri), 0 },
593 /*43*/ { "inc", FALSE, LONG, op1(Ri), 0 },
594 /*44*/ { "inc", FALSE, LONG, op1(Ri), 0 },
595 /*45*/ { "inc", FALSE, LONG, op1(Ri), 0 },
596 /*46*/ { "inc", FALSE, LONG, op1(Ri), 0 },
597 /*47*/ { "inc", FALSE, LONG, op1(Ri), 0 },
598
599 /*48*/ { "dec", FALSE, LONG, op1(Ri), 0 },
600 /*49*/ { "dec", FALSE, LONG, op1(Ri), 0 },
601 /*4a*/ { "dec", FALSE, LONG, op1(Ri), 0 },
602 /*4b*/ { "dec", FALSE, LONG, op1(Ri), 0 },
603 /*4c*/ { "dec", FALSE, LONG, op1(Ri), 0 },
604 /*4d*/ { "dec", FALSE, LONG, op1(Ri), 0 },
605 /*4e*/ { "dec", FALSE, LONG, op1(Ri), 0 },
606 /*4f*/ { "dec", FALSE, LONG, op1(Ri), 0 },
607
608 /*50*/ { "push", FALSE, LONG, op1(Ri), 0 },
609 /*51*/ { "push", FALSE, LONG, op1(Ri), 0 },
610 /*52*/ { "push", FALSE, LONG, op1(Ri), 0 },
611 /*53*/ { "push", FALSE, LONG, op1(Ri), 0 },
612 /*54*/ { "push", FALSE, LONG, op1(Ri), 0 },
613 /*55*/ { "push", FALSE, LONG, op1(Ri), 0 },
614 /*56*/ { "push", FALSE, LONG, op1(Ri), 0 },
615 /*57*/ { "push", FALSE, LONG, op1(Ri), 0 },
616
617 /*58*/ { "pop", FALSE, LONG, op1(Ri), 0 },
618 /*59*/ { "pop", FALSE, LONG, op1(Ri), 0 },
619 /*5a*/ { "pop", FALSE, LONG, op1(Ri), 0 },
620 /*5b*/ { "pop", FALSE, LONG, op1(Ri), 0 },
621 /*5c*/ { "pop", FALSE, LONG, op1(Ri), 0 },
622 /*5d*/ { "pop", FALSE, LONG, op1(Ri), 0 },
623 /*5e*/ { "pop", FALSE, LONG, op1(Ri), 0 },
624 /*5f*/ { "pop", FALSE, LONG, op1(Ri), 0 },
625
626 /*60*/ { "pusha", FALSE, LONG, 0, 0 },
627 /*61*/ { "popa", FALSE, LONG, 0, 0 },
628 /*62*/ { "bound", TRUE, LONG, op2(E, R), 0 },
629 /*63*/ { "arpl", TRUE, NONE, op2(Rw,Ew), 0 },
630
631 /*64*/ { "", FALSE, NONE, 0, 0 },
632 /*65*/ { "", FALSE, NONE, 0, 0 },
633 /*66*/ { "", FALSE, NONE, 0, 0 },
634 /*67*/ { "", FALSE, NONE, 0, 0 },
635
636 /*68*/ { "push", FALSE, LONG, op1(I), 0 },
637 /*69*/ { "imul", TRUE, LONG, op3(I,E,R), 0 },
638 /*6a*/ { "push", FALSE, LONG, op1(Ibs), 0 },
639 /*6b*/ { "imul", TRUE, LONG, op3(Ibs,E,R),0 },
640 /*6c*/ { "ins", FALSE, BYTE, op2(DX, DI), 0 },
641 /*6d*/ { "ins", FALSE, LONG, op2(DX, DI), 0 },
642 /*6e*/ { "outs", FALSE, BYTE, op2(SI, DX), 0 },
643 /*6f*/ { "outs", FALSE, LONG, op2(SI, DX), 0 },
644
645 /*70*/ { "jo", FALSE, NONE, op1(Db), 0 },
646 /*71*/ { "jno", FALSE, NONE, op1(Db), 0 },
647 /*72*/ { "jb", FALSE, NONE, op1(Db), 0 },
648 /*73*/ { "jnb", FALSE, NONE, op1(Db), 0 },
649 /*74*/ { "jz", FALSE, NONE, op1(Db), 0 },
650 /*75*/ { "jnz", FALSE, NONE, op1(Db), 0 },
651 /*76*/ { "jbe", FALSE, NONE, op1(Db), 0 },
652 /*77*/ { "jnbe", FALSE, NONE, op1(Db), 0 },
653
654 /*78*/ { "js", FALSE, NONE, op1(Db), 0 },
655 /*79*/ { "jns", FALSE, NONE, op1(Db), 0 },
656 /*7a*/ { "jp", FALSE, NONE, op1(Db), 0 },
657 /*7b*/ { "jnp", FALSE, NONE, op1(Db), 0 },
658 /*7c*/ { "jl", FALSE, NONE, op1(Db), 0 },
659 /*7d*/ { "jnl", FALSE, NONE, op1(Db), 0 },
660 /*7e*/ { "jle", FALSE, NONE, op1(Db), 0 },
661 /*7f*/ { "jnle", FALSE, NONE, op1(Db), 0 },
662
663 /*80*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 },
664 /*81*/ { "", TRUE, LONG, op2(I, E), db_Grp1 },
665 /*82*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 },
666 /*83*/ { "", TRUE, LONG, op2(Ibs,E), db_Grp1 },
667 /*84*/ { "test", TRUE, BYTE, op2(R, E), 0 },
668 /*85*/ { "test", TRUE, LONG, op2(R, E), 0 },
669 /*86*/ { "xchg", TRUE, BYTE, op2(R, E), 0 },
670 /*87*/ { "xchg", TRUE, LONG, op2(R, E), 0 },
671
672 /*88*/ { "mov", TRUE, BYTE, op2(R, E), 0 },
673 /*89*/ { "mov", TRUE, LONG, op2(R, E), 0 },
674 /*8a*/ { "mov", TRUE, BYTE, op2(E, R), 0 },
675 /*8b*/ { "mov", TRUE, LONG, op2(E, R), 0 },
676 /*8c*/ { "mov", TRUE, NONE, op2(S, Ew), 0 },
677 /*8d*/ { "lea", TRUE, LONG, op2(E, R), 0 },
678 /*8e*/ { "mov", TRUE, NONE, op2(Ew, S), 0 },
679 /*8f*/ { "pop", TRUE, LONG, op1(E), 0 },
680
681 /*90*/ { "nop", FALSE, NONE, 0, 0 },
682 /*91*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
683 /*92*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
684 /*93*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
685 /*94*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
686 /*95*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
687 /*96*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
688 /*97*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
689
690 /*98*/ { "cbw", FALSE, SDEP, 0, "cwde" }, /* cbw/cwde */
691 /*99*/ { "cwd", FALSE, SDEP, 0, "cdq" }, /* cwd/cdq */
692 /*9a*/ { "lcall", FALSE, NONE, op1(OS), 0 },
693 /*9b*/ { "wait", FALSE, NONE, 0, 0 },
694 /*9c*/ { "pushf", FALSE, LONG, 0, 0 },
695 /*9d*/ { "popf", FALSE, LONG, 0, 0 },
696 /*9e*/ { "sahf", FALSE, NONE, 0, 0 },
697 /*9f*/ { "lahf", FALSE, NONE, 0, 0 },
698
699 /*a0*/ { "mov", FALSE, BYTE, op2(O, A), 0 },
700 /*a1*/ { "mov", FALSE, LONG, op2(O, A), 0 },
701 /*a2*/ { "mov", FALSE, BYTE, op2(A, O), 0 },
702 /*a3*/ { "mov", FALSE, LONG, op2(A, O), 0 },
703 /*a4*/ { "movs", FALSE, BYTE, op2(SI,DI), 0 },
704 /*a5*/ { "movs", FALSE, LONG, op2(SI,DI), 0 },
705 /*a6*/ { "cmps", FALSE, BYTE, op2(SI,DI), 0 },
706 /*a7*/ { "cmps", FALSE, LONG, op2(SI,DI), 0 },
707
708 /*a8*/ { "test", FALSE, BYTE, op2(I, A), 0 },
709 /*a9*/ { "test", FALSE, LONG, op2(I, A), 0 },
710 /*aa*/ { "stos", FALSE, BYTE, op1(DI), 0 },
711 /*ab*/ { "stos", FALSE, LONG, op1(DI), 0 },
712 /*ac*/ { "lods", FALSE, BYTE, op1(SI), 0 },
713 /*ad*/ { "lods", FALSE, LONG, op1(SI), 0 },
714 /*ae*/ { "scas", FALSE, BYTE, op1(SI), 0 },
715 /*af*/ { "scas", FALSE, LONG, op1(SI), 0 },
716
717 /*b0*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
718 /*b1*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
719 /*b2*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
720 /*b3*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
721 /*b4*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
722 /*b5*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
723 /*b6*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
724 /*b7*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
725
726 /*b8*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
727 /*b9*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
728 /*ba*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
729 /*bb*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
730 /*bc*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
731 /*bd*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
732 /*be*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
733 /*bf*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
734
735 /*c0*/ { "", TRUE, BYTE, op2(Ib, E), db_Grp2 },
736 /*c1*/ { "", TRUE, LONG, op2(Ib, E), db_Grp2 },
737 /*c2*/ { "ret", FALSE, NONE, op1(Iw), 0 },
738 /*c3*/ { "ret", FALSE, NONE, 0, 0 },
739 /*c4*/ { "les", TRUE, LONG, op2(E, R), 0 },
740 /*c5*/ { "lds", TRUE, LONG, op2(E, R), 0 },
741 /*c6*/ { "mov", TRUE, BYTE, op2(I, E), 0 },
742 /*c7*/ { "mov", TRUE, LONG, op2(I, E), 0 },
743
744 /*c8*/ { "enter", FALSE, NONE, op2(Iw, Ib), 0 },
745 /*c9*/ { "leave", FALSE, NONE, 0, 0 },
746 /*ca*/ { "lret", FALSE, NONE, op1(Iw), 0 },
747 /*cb*/ { "lret", FALSE, NONE, 0, 0 },
748 /*cc*/ { "int", FALSE, NONE, op1(o3), 0 },
749 /*cd*/ { "int", FALSE, NONE, op1(Ib), 0 },
750 /*ce*/ { "into", FALSE, NONE, 0, 0 },
751 /*cf*/ { "iret", FALSE, NONE, 0, 0 },
752
753 /*d0*/ { "", TRUE, BYTE, op2(o1, E), db_Grp2 },
754 /*d1*/ { "", TRUE, LONG, op2(o1, E), db_Grp2 },
755 /*d2*/ { "", TRUE, BYTE, op2(CL, E), db_Grp2 },
756 /*d3*/ { "", TRUE, LONG, op2(CL, E), db_Grp2 },
757 /*d4*/ { "aam", FALSE, NONE, op1(Iba), 0 },
758 /*d5*/ { "aad", FALSE, NONE, op1(Iba), 0 },
759 /*d6*/ { ".byte\t0xd6", FALSE, NONE, 0, 0 },
760 /*d7*/ { "xlat", FALSE, BYTE, op1(BX), 0 },
761
762 /*d8*/ { "", TRUE, NONE, 0, db_Esc8 },
763 /*d9*/ { "", TRUE, NONE, 0, db_Esc9 },
764 /*da*/ { "", TRUE, NONE, 0, db_Esca },
765 /*db*/ { "", TRUE, NONE, 0, db_Escb },
766 /*dc*/ { "", TRUE, NONE, 0, db_Escc },
767 /*dd*/ { "", TRUE, NONE, 0, db_Escd },
768 /*de*/ { "", TRUE, NONE, 0, db_Esce },
769 /*df*/ { "", TRUE, NONE, 0, db_Escf },
770
771 /*e0*/ { "loopne",FALSE, NONE, op1(Db), 0 },
772 /*e1*/ { "loope", FALSE, NONE, op1(Db), 0 },
773 /*e2*/ { "loop", FALSE, NONE, op1(Db), 0 },
774 /*e3*/ { "jcxz", FALSE, SDEP, op1(Db), "jecxz" },
775 /*e4*/ { "in", FALSE, BYTE, op2(Ib, A), 0 },
776 /*e5*/ { "in", FALSE, LONG, op2(Ib, A) , 0 },
777 /*e6*/ { "out", FALSE, BYTE, op2(A, Ib), 0 },
778 /*e7*/ { "out", FALSE, LONG, op2(A, Ib) , 0 },
779
780 /*e8*/ { "call", FALSE, NONE, op1(Dl), 0 },
781 /*e9*/ { "jmp", FALSE, NONE, op1(Dl), 0 },
782 /*ea*/ { "ljmp", FALSE, NONE, op1(OS), 0 },
783 /*eb*/ { "jmp", FALSE, NONE, op1(Db), 0 },
784 /*ec*/ { "in", FALSE, BYTE, op2(DX, A), 0 },
785 /*ed*/ { "in", FALSE, LONG, op2(DX, A) , 0 },
786 /*ee*/ { "out", FALSE, BYTE, op2(A, DX), 0 },
787 /*ef*/ { "out", FALSE, LONG, op2(A, DX) , 0 },
788
789 /*f0*/ { "", FALSE, NONE, 0, 0 },
790 /*f1*/ { ".byte\t0xf1", FALSE, NONE, 0, 0 },
791 /*f2*/ { "", FALSE, NONE, 0, 0 },
792 /*f3*/ { "", FALSE, NONE, 0, 0 },
793 /*f4*/ { "hlt", FALSE, NONE, 0, 0 },
794 /*f5*/ { "cmc", FALSE, NONE, 0, 0 },
795 /*f6*/ { "", TRUE, BYTE, 0, db_Grp3 },
796 /*f7*/ { "", TRUE, LONG, 0, db_Grp3 },
797
798 /*f8*/ { "clc", FALSE, NONE, 0, 0 },
799 /*f9*/ { "stc", FALSE, NONE, 0, 0 },
800 /*fa*/ { "cli", FALSE, NONE, 0, 0 },
801 /*fb*/ { "sti", FALSE, NONE, 0, 0 },
802 /*fc*/ { "cld", FALSE, NONE, 0, 0 },
803 /*fd*/ { "std", FALSE, NONE, 0, 0 },
804 /*fe*/ { "", TRUE, NONE, 0, db_Grp4 },
805 /*ff*/ { "", TRUE, NONE, 0, db_Grp5 },
806 };
807
808 static const struct inst db_bad_inst =
809 { "???", FALSE, NONE, 0, 0 }
810 ;
811
812 #define f_mod(byte) ((byte)>>6)
813 #define f_reg(byte) (((byte)>>3)&0x7)
814 #define f_rm(byte) ((byte)&0x7)
815
816 #define sib_ss(byte) ((byte)>>6)
817 #define sib_index(byte) (((byte)>>3)&0x7)
818 #define sib_base(byte) ((byte)&0x7)
819
820 struct i_addr {
821 int is_reg; /* if reg, reg number is in 'disp' */
822 int disp;
823 const char * base;
824 const char * index;
825 int ss;
826 };
827
828 static const char * const db_index_reg_16[8] = {
829 "%bx,%si",
830 "%bx,%di",
831 "%bp,%si",
832 "%bp,%di",
833 "%si",
834 "%di",
835 "%bp",
836 "%bx"
837 };
838
839 static const char * const db_reg[3][8] = {
840 {"%al", "%cl", "%dl", "%bl", "%ah", "%ch", "%dh", "%bh"},
841 {"%ax", "%cx", "%dx", "%bx", "%sp", "%bp", "%si", "%di"},
842 {"%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi"}
843 };
844
845 static const char * const db_seg_reg[8] = {
846 "%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", ""
847 };
848
849 /*
850 * lengths for size attributes
851 */
852 static const int db_lengths[] = {
853 1, /* BYTE */
854 2, /* WORD */
855 4, /* LONG */
856 8, /* QUAD */
857 4, /* SNGL */
858 8, /* DBLR */
859 10, /* EXTR */
860 };
861
862 #define get_value_inc(result, loc, size, is_signed) \
863 result = db_get_value((loc), (size), (is_signed)); \
864 (loc) += (size);
865
866 /*static db_addr_t
867 // db_disasm_esc __P((db_addr_t loc, int inst, int short_addr,
868 // int size, const char *seg));
869 //static void db_print_address __P((const char *seg, int size,
870 // struct i_addr *addrp));
871 */
872 static db_addr_t
873 db_read_address __P((db_addr_t loc, int short_addr,
874 int regmodrm, struct i_addr *addrp));
875
876 /*
877 * Read address at location and return updated location.
878 */
879 static db_addr_t
880 db_read_address(loc, short_addr, regmodrm, addrp)
881 db_addr_t loc;
882 int short_addr;
883 int regmodrm;
884 struct i_addr * addrp; /* out */
885 {
886 int mod, rm, sib, index, disp;
887
888 mod = f_mod(regmodrm);
889 rm = f_rm(regmodrm);
890
891 if (mod == 3) {
892 addrp->is_reg = TRUE;
893 addrp->disp = rm;
894 return (loc);
895 }
896 addrp->is_reg = FALSE;
897 addrp->index = 0;
898
899 if (short_addr) {
900 addrp->index = 0;
901 addrp->ss = 0;
902 switch (mod) {
903 case 0:
904 if (rm == 6) {
905 get_value_inc(disp, loc, 2, FALSE);
906 addrp->disp = disp;
907 addrp->base = 0;
908 }
909 else {
910 addrp->disp = 0;
911 addrp->base = db_index_reg_16[rm];
912 }
913 break;
914 case 1:
915 get_value_inc(disp, loc, 1, TRUE);
916 disp &= 0xFFFF;
917 addrp->disp = disp;
918 addrp->base = db_index_reg_16[rm];
919 break;
920 case 2:
921 get_value_inc(disp, loc, 2, FALSE);
922 addrp->disp = disp;
923 addrp->base = db_index_reg_16[rm];
924 break;
925 }
926 }
927 else {
928 if (mod != 3 && rm == 4) {
929 get_value_inc(sib, loc, 1, FALSE);
930 rm = sib_base(sib);
931 index = sib_index(sib);
932 if (index != 4)
933 addrp->index = db_reg[LONG][index];
934 addrp->ss = sib_ss(sib);
935 }
936
937 switch (mod) {
938 case 0:
939 if (rm == 5) {
940 get_value_inc(addrp->disp, loc, 4, FALSE);
941 addrp->base = 0;
942 }
943 else {
944 addrp->disp = 0;
945 addrp->base = db_reg[LONG][rm];
946 }
947 break;
948
949 case 1:
950 get_value_inc(disp, loc, 1, TRUE);
951 addrp->disp = disp;
952 addrp->base = db_reg[LONG][rm];
953 break;
954
955 case 2:
956 get_value_inc(disp, loc, 4, FALSE);
957 addrp->disp = disp;
958 addrp->base = db_reg[LONG][rm];
959 break;
960 }
961 }
962 return (loc);
963 }
964
965 /*
966 * NWT: fault injection routine only. disasm floating-point instruction
967 * and return updated location.
968 */
969 static db_addr_t
970 my_disasm_esc(
971 db_addr_t loc,
972 int inst,
973 int short_addr,
974 int size,
975 const char * seg)
976 {
977 int regmodrm;
978 const struct finst * fp;
979 int mod;
980 struct i_addr address;
981 const char * name;
982
983 get_value_inc(regmodrm, loc, 1, FALSE);
984 fp = &db_Esc_inst[inst - 0xd8][f_reg(regmodrm)];
985 mod = f_mod(regmodrm);
986 if (mod != 3) {
987 if (*fp->f_name == '\0') {
988 return (loc);
989 }
990 /*
991 * Normal address modes.
992 */
993 loc = db_read_address(loc, short_addr, regmodrm, &address);
994 switch(fp->f_size) {
995 case SNGL:
996 break;
997 case DBLR:
998 break;
999 case EXTR:
1000 break;
1001 case WORD:
1002 break;
1003 case LONG:
1004 break;
1005 case QUAD:
1006 break;
1007 default:
1008 break;
1009 }
1010 }
1011 else {
1012 /*
1013 * 'reg-reg' - special formats
1014 */
1015 switch (fp->f_rrmode) {
1016 case op2(ST,STI):
1017 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1018 break;
1019 case op2(STI,ST):
1020 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1021 break;
1022 case op1(STI):
1023 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1024 break;
1025 case op1(X):
1026 name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)];
1027 if (*name == '\0')
1028 goto bad;
1029 break;
1030 case op1(XA):
1031 name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)];
1032 if (*name == '\0')
1033 goto bad;
1034 break;
1035 default:
1036 bad:
1037 break;
1038 }
1039 }
1040
1041 return (loc);
1042 }
1043 /*
1044 * Disassemble instruction at 'loc'. 'altfmt' specifies an
1045 * (optional) alternate format. Return address of start of
1046 * next instruction.
1047 */
1048 db_addr_t
1049 my_disasm(db_addr_t loc,
1050 boolean_t altfmt)
1051 {
1052 int inst;
1053 int size;
1054 int short_addr;
1055 const char * seg;
1056 const struct inst * ip;
1057 const char * i_name;
1058 int i_size;
1059 int i_mode;
1060 int regmodrm = 0;
1061 boolean_t first;
1062 int displ;
1063 int prefix;
1064 int imm;
1065 int imm2;
1066 int len;
1067 struct i_addr address;
1068
1069 get_value_inc(inst, loc, 1, FALSE);
1070 short_addr = FALSE;
1071 size = LONG;
1072 seg = 0;
1073
1074 /*
1075 * Get prefixes
1076 */
1077 prefix = TRUE;
1078 do {
1079 switch (inst) {
1080 case 0x66: /* data16 */
1081 size = WORD;
1082 break;
1083 case 0x67:
1084 short_addr = TRUE;
1085 break;
1086 case 0x26:
1087 seg = "%es";
1088 break;
1089 case 0x36:
1090 seg = "%ss";
1091 break;
1092 case 0x2e:
1093 seg = "%cs";
1094 break;
1095 case 0x3e:
1096 seg = "%ds";
1097 break;
1098 case 0x64:
1099 seg = "%fs";
1100 break;
1101 case 0x65:
1102 seg = "%gs";
1103 break;
1104 case 0xf0:
1105 #if 0
1106 // db_printf("lock ");
1107 #endif
1108 break;
1109 case 0xf2:
1110 #if 0
1111 // db_printf("repne ");
1112 #endif
1113 break;
1114 case 0xf3:
1115 #if 0
1116 // db_printf("repe "); /* XXX repe VS rep */
1117 #endif
1118 break;
1119 default:
1120 prefix = FALSE;
1121 break;
1122 }
1123 if (prefix) {
1124 get_value_inc(inst, loc, 1, FALSE);
1125 }
1126 } while (prefix);
1127
1128 if (inst >= 0xd8 && inst <= 0xdf) {
1129 loc = my_disasm_esc(loc, inst, short_addr, size, seg);
1130 return (loc);
1131 }
1132
1133 if (inst == 0x0f) {
1134 get_value_inc(inst, loc, 1, FALSE);
1135 ip = db_inst_0f[inst>>4];
1136 if (ip == 0) {
1137 ip = &db_bad_inst;
1138 }
1139 else {
1140 ip = &ip[inst&0xf];
1141 }
1142 }
1143 else
1144 ip = &db_inst_table[inst];
1145
1146 if (ip->i_has_modrm) {
1147 unsigned long prev_loc=loc;
1148 extern unsigned long modAddr;
1149
1150 get_value_inc(regmodrm, loc, 1, FALSE);
1151 loc = db_read_address(loc, short_addr, regmodrm, &address);
1152 modAddr=prev_loc;
1153 #if 0
1154 // printf("modrm at %x, offset %d\n", loc, loc-prev_loc);
1155 #endif
1156 }
1157
1158 i_name = ip->i_name;
1159 i_size = ip->i_size;
1160 i_mode = ip->i_mode;
1161
1162 if (ip->i_extra == db_Grp1 || ip->i_extra == db_Grp2 ||
1163 ip->i_extra == db_Grp6 || ip->i_extra == db_Grp7 ||
1164 ip->i_extra == db_Grp8 || ip->i_extra == db_Grp9) {
1165 i_name = ((const char * const *)ip->i_extra)[f_reg(regmodrm)];
1166 }
1167 else if (ip->i_extra == db_Grp3) {
1168 ip = ip->i_extra;
1169 ip = &ip[f_reg(regmodrm)];
1170 i_name = ip->i_name;
1171 i_mode = ip->i_mode;
1172 }
1173 else if (ip->i_extra == db_Grp4 || ip->i_extra == db_Grp5) {
1174 ip = ip->i_extra;
1175 ip = &ip[f_reg(regmodrm)];
1176 i_name = ip->i_name;
1177 i_mode = ip->i_mode;
1178 i_size = ip->i_size;
1179 }
1180
1181 if (i_size == SDEP) {
1182 }
1183 else {
1184 if (i_size != NONE) {
1185 if (i_size == BYTE) {
1186 size = BYTE;
1187 }
1188 else if (i_size == WORD) {
1189 size = WORD;
1190 }
1191 }
1192 }
1193 for (first = TRUE;
1194 i_mode != 0;
1195 i_mode >>= 8, first = FALSE)
1196 {
1197
1198 switch (i_mode & 0xFF) {
1199
1200 case E:
1201 #if 0
1202 // db_print_address(seg, size, &address);
1203 #endif
1204 break;
1205
1206 case Eind:
1207 #if 0
1208 // db_print_address(seg, size, &address);
1209 #endif
1210 break;
1211
1212 case El:
1213 #if 0
1214 // db_print_address(seg, LONG, &address);
1215 #endif
1216 break;
1217
1218 case Ew:
1219 #if 0
1220 // db_print_address(seg, WORD, &address);
1221 #endif
1222 break;
1223
1224 case Eb:
1225 #if 0
1226 // db_print_address(seg, BYTE, &address);
1227 #endif
1228 break;
1229
1230 case R:
1231 #if 0
1232 // db_printf("%s", db_reg[size][f_reg(regmodrm)]);
1233 #endif
1234 break;
1235
1236 case Rw:
1237 #if 0
1238 // db_printf("%s", db_reg[WORD][f_reg(regmodrm)]);
1239 #endif
1240 break;
1241
1242 case Ri:
1243 #if 0
1244 // db_printf("%s", db_reg[size][f_rm(inst)]);
1245 #endif
1246 break;
1247
1248 case Ril:
1249 #if 0
1250 // db_printf("%s", db_reg[LONG][f_rm(inst)]);
1251 #endif
1252 break;
1253
1254 case S:
1255 #if 0
1256 // db_printf("%s", db_seg_reg[f_reg(regmodrm)]);
1257 #endif
1258 break;
1259
1260 case Si:
1261 #if 0
1262 // db_printf("%s", db_seg_reg[f_reg(inst)]);
1263 #endif
1264 break;
1265
1266 case A:
1267 #if 0
1268 // db_printf("%s", db_reg[size][0]); /* acc */
1269 #endif
1270 break;
1271
1272 case BX:
1273 break;
1274
1275 case CL:
1276 break;
1277
1278 case DX:
1279 break;
1280
1281 case SI:
1282 break;
1283
1284 case DI:
1285 break;
1286
1287 case CR:
1288 break;
1289
1290 case DR:
1291 break;
1292
1293 case TR:
1294 break;
1295
1296 case I:
1297 len = db_lengths[size];
1298 get_value_inc(imm, loc, len, FALSE);
1299 break;
1300
1301 case Is:
1302 len = db_lengths[size];
1303 get_value_inc(imm, loc, len, FALSE);
1304 /*
1305 * XXX the + in this format doesn't seem to work right.
1306 * `Is' is equivalent to `I'.
1307 */
1308 break;
1309
1310 case Ib:
1311 get_value_inc(imm, loc, 1, FALSE);
1312 break;
1313
1314 case Iba:
1315 get_value_inc(imm, loc, 1, FALSE);
1316 break;
1317
1318 case Ibs:
1319 get_value_inc(imm, loc, 1, TRUE);
1320 if (size == WORD)
1321 imm &= 0xFFFF;
1322 break;
1323
1324 case Iw:
1325 get_value_inc(imm, loc, 2, FALSE);
1326 break;
1327
1328 case O:
1329 len = (short_addr ? 2 : 4);
1330 get_value_inc(displ, loc, len, FALSE);
1331 if (seg) ;
1332 else
1333 #if 0
1334 // db_printsym((db_addr_t)displ, DB_STGY_ANY);
1335 #endif
1336 break;
1337
1338 case Db:
1339 get_value_inc(displ, loc, 1, TRUE);
1340 displ += loc;
1341 if (size == WORD)
1342 displ &= 0xFFFF;
1343 #if 0
1344 // db_printsym((db_addr_t)displ, DB_STGY_XTRN);
1345 #endif
1346 break;
1347
1348 case Dl:
1349 len = db_lengths[size];
1350 get_value_inc(displ, loc, len, FALSE);
1351 displ += loc;
1352 if (size == WORD)
1353 displ &= 0xFFFF;
1354 #if 0
1355 // db_printsym((db_addr_t)displ, DB_STGY_XTRN);
1356 #endif
1357 break;
1358
1359 case o1:
1360 break;
1361
1362 case o3:
1363 break;
1364
1365 case OS:
1366 len = db_lengths[size];
1367 get_value_inc(imm, loc, len, FALSE); /* offset */
1368 get_value_inc(imm2, loc, 2, FALSE); /* segment */
1369 break;
1370 }
1371 }
1372 #if 0
1373 // db_printf("\n");
1374 #endif
1375 return (loc);
1376 }
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