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Ansify the rest of the K&R-style function declarations in sys/i386.
[dragonfly.git] / sys / platform / pc32 / i386 / db_disasm.c
blob9ee2a65641dcf0dea0271e6ebaf005ed7cac90a8
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 * $FreeBSD: src/sys/i386/i386/db_disasm.c,v 1.23.2.1 2001/07/29 22:48:37 kris Exp $
27 * $DragonFly: src/sys/platform/pc32/i386/Attic/db_disasm.c,v 1.5 2006/09/13 18:45:12 swildner Exp $
28 */
29
30 /*
31 * Instruction disassembler.
32 */
33 #include <sys/param.h>
34
35 #include <ddb/ddb.h>
36 #include <ddb/db_access.h>
37 #include <ddb/db_sym.h>
38
39 /*
40 * Size attributes
41 */
42 #define BYTE 0
43 #define WORD 1
44 #define LONG 2
45 #define QUAD 3
46 #define SNGL 4
47 #define DBLR 5
48 #define EXTR 6
49 #define SDEP 7
50 #define NONE 8
51
52 /*
53 * Addressing modes
54 */
55 #define E 1 /* general effective address */
56 #define Eind 2 /* indirect address (jump, call) */
57 #define Ew 3 /* address, word size */
58 #define Eb 4 /* address, byte size */
59 #define R 5 /* register, in 'reg' field */
60 #define Rw 6 /* word register, in 'reg' field */
61 #define Ri 7 /* register in instruction */
62 #define S 8 /* segment reg, in 'reg' field */
63 #define Si 9 /* segment reg, in instruction */
64 #define A 10 /* accumulator */
65 #define BX 11 /* (bx) */
66 #define CL 12 /* cl, for shifts */
67 #define DX 13 /* dx, for IO */
68 #define SI 14 /* si */
69 #define DI 15 /* di */
70 #define CR 16 /* control register */
71 #define DR 17 /* debug register */
72 #define TR 18 /* test register */
73 #define I 19 /* immediate, unsigned */
74 #define Is 20 /* immediate, signed */
75 #define Ib 21 /* byte immediate, unsigned */
76 #define Ibs 22 /* byte immediate, signed */
77 #define Iw 23 /* word immediate, unsigned */
78 #define O 25 /* direct address */
79 #define Db 26 /* byte displacement from EIP */
80 #define Dl 27 /* long displacement from EIP */
81 #define o1 28 /* constant 1 */
82 #define o3 29 /* constant 3 */
83 #define OS 30 /* immediate offset/segment */
84 #define ST 31 /* FP stack top */
85 #define STI 32 /* FP stack */
86 #define X 33 /* extended FP op */
87 #define XA 34 /* for 'fstcw %ax' */
88 #define El 35 /* address, long size */
89 #define Ril 36 /* long register in instruction */
90 #define Iba 37 /* byte immediate, don't print if 0xa */
91
92 struct inst {
93 const char * i_name; /* name */
94 short i_has_modrm; /* has regmodrm byte */
95 short i_size; /* operand size */
96 int i_mode; /* addressing modes */
97 const void * i_extra; /* pointer to extra opcode table */
98 };
99
100 #define op1(x) (x)
101 #define op2(x,y) ((x)|((y)<<8))
102 #define op3(x,y,z) ((x)|((y)<<8)|((z)<<16))
103
104 struct finst {
105 const char * f_name; /* name for memory instruction */
106 int f_size; /* size for memory instruction */
107 int f_rrmode; /* mode for rr instruction */
108 const void * f_rrname; /* name for rr instruction
109 (or pointer to table) */
110 };
111
112 static const char * const db_Grp6[] = {
113 "sldt",
114 "str",
115 "lldt",
116 "ltr",
117 "verr",
118 "verw",
119 "",
120 ""
121 };
122
123 static const char * const db_Grp7[] = {
124 "sgdt",
125 "sidt",
126 "lgdt",
127 "lidt",
128 "smsw",
129 "",
130 "lmsw",
131 "invlpg"
132 };
133
134 static const char * const db_Grp8[] = {
135 "",
136 "",
137 "",
138 "",
139 "bt",
140 "bts",
141 "btr",
142 "btc"
143 };
144
145 static const char * const db_Grp9[] = {
146 "",
147 "cmpxchg8b",
148 "",
149 "",
150 "",
151 "",
152 "",
153 ""
154 };
155
156 static const struct inst db_inst_0f0x[] = {
157 /*00*/ { "", TRUE, NONE, op1(Ew), db_Grp6 },
158 /*01*/ { "", TRUE, NONE, op1(Ew), db_Grp7 },
159 /*02*/ { "lar", TRUE, LONG, op2(E,R), 0 },
160 /*03*/ { "lsl", TRUE, LONG, op2(E,R), 0 },
161 /*04*/ { "", FALSE, NONE, 0, 0 },
162 /*05*/ { "", FALSE, NONE, 0, 0 },
163 /*06*/ { "clts", FALSE, NONE, 0, 0 },
164 /*07*/ { "", FALSE, NONE, 0, 0 },
165
166 /*08*/ { "invd", FALSE, NONE, 0, 0 },
167 /*09*/ { "wbinvd",FALSE, NONE, 0, 0 },
168 /*0a*/ { "", FALSE, NONE, 0, 0 },
169 /*0b*/ { "", FALSE, NONE, 0, 0 },
170 /*0c*/ { "", FALSE, NONE, 0, 0 },
171 /*0d*/ { "", FALSE, NONE, 0, 0 },
172 /*0e*/ { "", FALSE, NONE, 0, 0 },
173 /*0f*/ { "", FALSE, NONE, 0, 0 },
174 };
175
176 static const struct inst db_inst_0f2x[] = {
177 /*20*/ { "mov", TRUE, LONG, op2(CR,El), 0 },
178 /*21*/ { "mov", TRUE, LONG, op2(DR,El), 0 },
179 /*22*/ { "mov", TRUE, LONG, op2(El,CR), 0 },
180 /*23*/ { "mov", TRUE, LONG, op2(El,DR), 0 },
181 /*24*/ { "mov", TRUE, LONG, op2(TR,El), 0 },
182 /*25*/ { "", FALSE, NONE, 0, 0 },
183 /*26*/ { "mov", TRUE, LONG, op2(El,TR), 0 },
184 /*27*/ { "", FALSE, NONE, 0, 0 },
185
186 /*28*/ { "", FALSE, NONE, 0, 0 },
187 /*29*/ { "", FALSE, NONE, 0, 0 },
188 /*2a*/ { "", FALSE, NONE, 0, 0 },
189 /*2b*/ { "", FALSE, NONE, 0, 0 },
190 /*2c*/ { "", FALSE, NONE, 0, 0 },
191 /*2d*/ { "", FALSE, NONE, 0, 0 },
192 /*2e*/ { "", FALSE, NONE, 0, 0 },
193 /*2f*/ { "", FALSE, NONE, 0, 0 },
194 };
195
196 static const struct inst db_inst_0f3x[] = {
197 /*30*/ { "wrmsr", FALSE, NONE, 0, 0 },
198 /*31*/ { "rdtsc", FALSE, NONE, 0, 0 },
199 /*32*/ { "rdmsr", FALSE, NONE, 0, 0 },
200 /*33*/ { "rdpmc", FALSE, NONE, 0, 0 },
201 /*34*/ { "", FALSE, NONE, 0, 0 },
202 /*35*/ { "", FALSE, NONE, 0, 0 },
203 /*36*/ { "", FALSE, NONE, 0, 0 },
204 /*37*/ { "", FALSE, NONE, 0, 0 },
205
206 /*38*/ { "", FALSE, NONE, 0, 0 },
207 /*39*/ { "", FALSE, NONE, 0, 0 },
208 /*3a*/ { "", FALSE, NONE, 0, 0 },
209 /*3b*/ { "", FALSE, NONE, 0, 0 },
210 /*3c*/ { "", FALSE, NONE, 0, 0 },
211 /*3d*/ { "", FALSE, NONE, 0, 0 },
212 /*3e*/ { "", FALSE, NONE, 0, 0 },
213 /*3f*/ { "", FALSE, NONE, 0, 0 },
214 };
215
216 static const struct inst db_inst_0f8x[] = {
217 /*80*/ { "jo", FALSE, NONE, op1(Dl), 0 },
218 /*81*/ { "jno", FALSE, NONE, op1(Dl), 0 },
219 /*82*/ { "jb", FALSE, NONE, op1(Dl), 0 },
220 /*83*/ { "jnb", FALSE, NONE, op1(Dl), 0 },
221 /*84*/ { "jz", FALSE, NONE, op1(Dl), 0 },
222 /*85*/ { "jnz", FALSE, NONE, op1(Dl), 0 },
223 /*86*/ { "jbe", FALSE, NONE, op1(Dl), 0 },
224 /*87*/ { "jnbe", FALSE, NONE, op1(Dl), 0 },
225
226 /*88*/ { "js", FALSE, NONE, op1(Dl), 0 },
227 /*89*/ { "jns", FALSE, NONE, op1(Dl), 0 },
228 /*8a*/ { "jp", FALSE, NONE, op1(Dl), 0 },
229 /*8b*/ { "jnp", FALSE, NONE, op1(Dl), 0 },
230 /*8c*/ { "jl", FALSE, NONE, op1(Dl), 0 },
231 /*8d*/ { "jnl", FALSE, NONE, op1(Dl), 0 },
232 /*8e*/ { "jle", FALSE, NONE, op1(Dl), 0 },
233 /*8f*/ { "jnle", FALSE, NONE, op1(Dl), 0 },
234 };
235
236 static const struct inst db_inst_0f9x[] = {
237 /*90*/ { "seto", TRUE, NONE, op1(Eb), 0 },
238 /*91*/ { "setno", TRUE, NONE, op1(Eb), 0 },
239 /*92*/ { "setb", TRUE, NONE, op1(Eb), 0 },
240 /*93*/ { "setnb", TRUE, NONE, op1(Eb), 0 },
241 /*94*/ { "setz", TRUE, NONE, op1(Eb), 0 },
242 /*95*/ { "setnz", TRUE, NONE, op1(Eb), 0 },
243 /*96*/ { "setbe", TRUE, NONE, op1(Eb), 0 },
244 /*97*/ { "setnbe",TRUE, NONE, op1(Eb), 0 },
245
246 /*98*/ { "sets", TRUE, NONE, op1(Eb), 0 },
247 /*99*/ { "setns", TRUE, NONE, op1(Eb), 0 },
248 /*9a*/ { "setp", TRUE, NONE, op1(Eb), 0 },
249 /*9b*/ { "setnp", TRUE, NONE, op1(Eb), 0 },
250 /*9c*/ { "setl", TRUE, NONE, op1(Eb), 0 },
251 /*9d*/ { "setnl", TRUE, NONE, op1(Eb), 0 },
252 /*9e*/ { "setle", TRUE, NONE, op1(Eb), 0 },
253 /*9f*/ { "setnle",TRUE, NONE, op1(Eb), 0 },
254 };
255
256 static const struct inst db_inst_0fax[] = {
257 /*a0*/ { "push", FALSE, NONE, op1(Si), 0 },
258 /*a1*/ { "pop", FALSE, NONE, op1(Si), 0 },
259 /*a2*/ { "cpuid", FALSE, NONE, 0, 0 },
260 /*a3*/ { "bt", TRUE, LONG, op2(R,E), 0 },
261 /*a4*/ { "shld", TRUE, LONG, op3(Ib,R,E), 0 },
262 /*a5*/ { "shld", TRUE, LONG, op3(CL,R,E), 0 },
263 /*a6*/ { "", FALSE, NONE, 0, 0 },
264 /*a7*/ { "", FALSE, NONE, 0, 0 },
265
266 /*a8*/ { "push", FALSE, NONE, op1(Si), 0 },
267 /*a9*/ { "pop", FALSE, NONE, op1(Si), 0 },
268 /*aa*/ { "rsm", FALSE, NONE, 0, 0 },
269 /*ab*/ { "bts", TRUE, LONG, op2(R,E), 0 },
270 /*ac*/ { "shrd", TRUE, LONG, op3(Ib,R,E), 0 },
271 /*ad*/ { "shrd", TRUE, LONG, op3(CL,R,E), 0 },
272 /*a6*/ { "", FALSE, NONE, 0, 0 },
273 /*a7*/ { "imul", TRUE, LONG, op2(E,R), 0 },
274 };
275
276 static const struct inst db_inst_0fbx[] = {
277 /*b0*/ { "cmpxchg",TRUE, BYTE, op2(R, E), 0 },
278 /*b0*/ { "cmpxchg",TRUE, LONG, op2(R, E), 0 },
279 /*b2*/ { "lss", TRUE, LONG, op2(E, R), 0 },
280 /*b3*/ { "btr", TRUE, LONG, op2(R, E), 0 },
281 /*b4*/ { "lfs", TRUE, LONG, op2(E, R), 0 },
282 /*b5*/ { "lgs", TRUE, LONG, op2(E, R), 0 },
283 /*b6*/ { "movzb", TRUE, LONG, op2(Eb, R), 0 },
284 /*b7*/ { "movzw", TRUE, LONG, op2(Ew, R), 0 },
285
286 /*b8*/ { "", FALSE, NONE, 0, 0 },
287 /*b9*/ { "", FALSE, NONE, 0, 0 },
288 /*ba*/ { "", TRUE, LONG, op2(Ib, E), db_Grp8 },
289 /*bb*/ { "btc", TRUE, LONG, op2(R, E), 0 },
290 /*bc*/ { "bsf", TRUE, LONG, op2(E, R), 0 },
291 /*bd*/ { "bsr", TRUE, LONG, op2(E, R), 0 },
292 /*be*/ { "movsb", TRUE, LONG, op2(Eb, R), 0 },
293 /*bf*/ { "movsw", TRUE, LONG, op2(Ew, R), 0 },
294 };
295
296 static const struct inst db_inst_0fcx[] = {
297 /*c0*/ { "xadd", TRUE, BYTE, op2(R, E), 0 },
298 /*c1*/ { "xadd", TRUE, LONG, op2(R, E), 0 },
299 /*c2*/ { "", FALSE, NONE, 0, 0 },
300 /*c3*/ { "", FALSE, NONE, 0, 0 },
301 /*c4*/ { "", FALSE, NONE, 0, 0 },
302 /*c5*/ { "", FALSE, NONE, 0, 0 },
303 /*c6*/ { "", FALSE, NONE, 0, 0 },
304 /*c7*/ { "", TRUE, NONE, op1(E), db_Grp9 },
305 /*c8*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
306 /*c9*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
307 /*ca*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
308 /*cb*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
309 /*cc*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
310 /*cd*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
311 /*ce*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
312 /*cf*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
313 };
314
315 static const struct inst * const db_inst_0f[] = {
316 db_inst_0f0x,
317 0,
318 db_inst_0f2x,
319 db_inst_0f3x,
320 0,
321 0,
322 0,
323 0,
324 db_inst_0f8x,
325 db_inst_0f9x,
326 db_inst_0fax,
327 db_inst_0fbx,
328 db_inst_0fcx,
329 0,
330 0,
331 0
332 };
333
334 static const char * const db_Esc92[] = {
335 "fnop", "", "", "", "", "", "", ""
336 };
337 static const char * const db_Esc94[] = {
338 "fchs", "fabs", "", "", "ftst", "fxam", "", ""
339 };
340 static const char * const db_Esc95[] = {
341 "fld1", "fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz",""
342 };
343 static const char * const db_Esc96[] = {
344 "f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp",
345 "fincstp"
346 };
347 static const char * const db_Esc97[] = {
348 "fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos"
349 };
350
351 static const char * const db_Esca5[] = {
352 "", "fucompp","", "", "", "", "", ""
353 };
354
355 static const char * const db_Escb4[] = {
356 "fneni","fndisi", "fnclex","fninit","fsetpm", "", "", ""
357 };
358
359 static const char * const db_Esce3[] = {
360 "", "fcompp","", "", "", "", "", ""
361 };
362
363 static const char * const db_Escf4[] = {
364 "fnstsw","", "", "", "", "", "", ""
365 };
366
367 static const struct finst db_Esc8[] = {
368 /*0*/ { "fadd", SNGL, op2(STI,ST), 0 },
369 /*1*/ { "fmul", SNGL, op2(STI,ST), 0 },
370 /*2*/ { "fcom", SNGL, op2(STI,ST), 0 },
371 /*3*/ { "fcomp", SNGL, op2(STI,ST), 0 },
372 /*4*/ { "fsub", SNGL, op2(STI,ST), 0 },
373 /*5*/ { "fsubr", SNGL, op2(STI,ST), 0 },
374 /*6*/ { "fdiv", SNGL, op2(STI,ST), 0 },
375 /*7*/ { "fdivr", SNGL, op2(STI,ST), 0 },
376 };
377
378 static const struct finst db_Esc9[] = {
379 /*0*/ { "fld", SNGL, op1(STI), 0 },
380 /*1*/ { "", NONE, op1(STI), "fxch" },
381 /*2*/ { "fst", SNGL, op1(X), db_Esc92 },
382 /*3*/ { "fstp", SNGL, 0, 0 },
383 /*4*/ { "fldenv", NONE, op1(X), db_Esc94 },
384 /*5*/ { "fldcw", NONE, op1(X), db_Esc95 },
385 /*6*/ { "fnstenv",NONE, op1(X), db_Esc96 },
386 /*7*/ { "fnstcw", NONE, op1(X), db_Esc97 },
387 };
388
389 static const struct finst db_Esca[] = {
390 /*0*/ { "fiadd", LONG, 0, 0 },
391 /*1*/ { "fimul", LONG, 0, 0 },
392 /*2*/ { "ficom", LONG, 0, 0 },
393 /*3*/ { "ficomp", LONG, 0, 0 },
394 /*4*/ { "fisub", LONG, 0, 0 },
395 /*5*/ { "fisubr", LONG, op1(X), db_Esca5 },
396 /*6*/ { "fidiv", LONG, 0, 0 },
397 /*7*/ { "fidivr", LONG, 0, 0 }
398 };
399
400 static const struct finst db_Escb[] = {
401 /*0*/ { "fild", LONG, 0, 0 },
402 /*1*/ { "", NONE, 0, 0 },
403 /*2*/ { "fist", LONG, 0, 0 },
404 /*3*/ { "fistp", LONG, 0, 0 },
405 /*4*/ { "", WORD, op1(X), db_Escb4 },
406 /*5*/ { "fld", EXTR, 0, 0 },
407 /*6*/ { "", WORD, 0, 0 },
408 /*7*/ { "fstp", EXTR, 0, 0 },
409 };
410
411 static const struct finst db_Escc[] = {
412 /*0*/ { "fadd", DBLR, op2(ST,STI), 0 },
413 /*1*/ { "fmul", DBLR, op2(ST,STI), 0 },
414 /*2*/ { "fcom", DBLR, 0, 0 },
415 /*3*/ { "fcomp", DBLR, 0, 0 },
416 /*4*/ { "fsub", DBLR, op2(ST,STI), "fsubr" },
417 /*5*/ { "fsubr", DBLR, op2(ST,STI), "fsub" },
418 /*6*/ { "fdiv", DBLR, op2(ST,STI), "fdivr" },
419 /*7*/ { "fdivr", DBLR, op2(ST,STI), "fdiv" },
420 };
421
422 static const struct finst db_Escd[] = {
423 /*0*/ { "fld", DBLR, op1(STI), "ffree" },
424 /*1*/ { "", NONE, 0, 0 },
425 /*2*/ { "fst", DBLR, op1(STI), 0 },
426 /*3*/ { "fstp", DBLR, op1(STI), 0 },
427 /*4*/ { "frstor", NONE, op1(STI), "fucom" },
428 /*5*/ { "", NONE, op1(STI), "fucomp" },
429 /*6*/ { "fnsave", NONE, 0, 0 },
430 /*7*/ { "fnstsw", NONE, 0, 0 },
431 };
432
433 static const struct finst db_Esce[] = {
434 /*0*/ { "fiadd", WORD, op2(ST,STI), "faddp" },
435 /*1*/ { "fimul", WORD, op2(ST,STI), "fmulp" },
436 /*2*/ { "ficom", WORD, 0, 0 },
437 /*3*/ { "ficomp", WORD, op1(X), db_Esce3 },
438 /*4*/ { "fisub", WORD, op2(ST,STI), "fsubrp" },
439 /*5*/ { "fisubr", WORD, op2(ST,STI), "fsubp" },
440 /*6*/ { "fidiv", WORD, op2(ST,STI), "fdivrp" },
441 /*7*/ { "fidivr", WORD, op2(ST,STI), "fdivp" },
442 };
443
444 static const struct finst db_Escf[] = {
445 /*0*/ { "fild", WORD, 0, 0 },
446 /*1*/ { "", NONE, 0, 0 },
447 /*2*/ { "fist", WORD, 0, 0 },
448 /*3*/ { "fistp", WORD, 0, 0 },
449 /*4*/ { "fbld", NONE, op1(XA), db_Escf4 },
450 /*5*/ { "fild", QUAD, 0, 0 },
451 /*6*/ { "fbstp", NONE, 0, 0 },
452 /*7*/ { "fistp", QUAD, 0, 0 },
453 };
454
455 static const struct finst * const db_Esc_inst[] = {
456 db_Esc8, db_Esc9, db_Esca, db_Escb,
457 db_Escc, db_Escd, db_Esce, db_Escf
458 };
459
460 static const char * const db_Grp1[] = {
461 "add",
462 "or",
463 "adc",
464 "sbb",
465 "and",
466 "sub",
467 "xor",
468 "cmp"
469 };
470
471 static const char * const db_Grp2[] = {
472 "rol",
473 "ror",
474 "rcl",
475 "rcr",
476 "shl",
477 "shr",
478 "shl",
479 "sar"
480 };
481
482 static const struct inst db_Grp3[] = {
483 { "test", TRUE, NONE, op2(I,E), 0 },
484 { "test", TRUE, NONE, op2(I,E), 0 },
485 { "not", TRUE, NONE, op1(E), 0 },
486 { "neg", TRUE, NONE, op1(E), 0 },
487 { "mul", TRUE, NONE, op2(E,A), 0 },
488 { "imul", TRUE, NONE, op2(E,A), 0 },
489 { "div", TRUE, NONE, op2(E,A), 0 },
490 { "idiv", TRUE, NONE, op2(E,A), 0 },
491 };
492
493 static const struct inst db_Grp4[] = {
494 { "inc", TRUE, BYTE, op1(E), 0 },
495 { "dec", TRUE, BYTE, op1(E), 0 },
496 { "", TRUE, NONE, 0, 0 },
497 { "", TRUE, NONE, 0, 0 },
498 { "", TRUE, NONE, 0, 0 },
499 { "", TRUE, NONE, 0, 0 },
500 { "", TRUE, NONE, 0, 0 },
501 { "", TRUE, NONE, 0, 0 }
502 };
503
504 static const struct inst db_Grp5[] = {
505 { "inc", TRUE, LONG, op1(E), 0 },
506 { "dec", TRUE, LONG, op1(E), 0 },
507 { "call", TRUE, LONG, op1(Eind),0 },
508 { "lcall", TRUE, LONG, op1(Eind),0 },
509 { "jmp", TRUE, LONG, op1(Eind),0 },
510 { "ljmp", TRUE, LONG, op1(Eind),0 },
511 { "push", TRUE, LONG, op1(E), 0 },
512 { "", TRUE, NONE, 0, 0 }
513 };
514
515 static const struct inst db_inst_table[256] = {
516 /*00*/ { "add", TRUE, BYTE, op2(R, E), 0 },
517 /*01*/ { "add", TRUE, LONG, op2(R, E), 0 },
518 /*02*/ { "add", TRUE, BYTE, op2(E, R), 0 },
519 /*03*/ { "add", TRUE, LONG, op2(E, R), 0 },
520 /*04*/ { "add", FALSE, BYTE, op2(I, A), 0 },
521 /*05*/ { "add", FALSE, LONG, op2(Is, A), 0 },
522 /*06*/ { "push", FALSE, NONE, op1(Si), 0 },
523 /*07*/ { "pop", FALSE, NONE, op1(Si), 0 },
524
525 /*08*/ { "or", TRUE, BYTE, op2(R, E), 0 },
526 /*09*/ { "or", TRUE, LONG, op2(R, E), 0 },
527 /*0a*/ { "or", TRUE, BYTE, op2(E, R), 0 },
528 /*0b*/ { "or", TRUE, LONG, op2(E, R), 0 },
529 /*0c*/ { "or", FALSE, BYTE, op2(I, A), 0 },
530 /*0d*/ { "or", FALSE, LONG, op2(I, A), 0 },
531 /*0e*/ { "push", FALSE, NONE, op1(Si), 0 },
532 /*0f*/ { "", FALSE, NONE, 0, 0 },
533
534 /*10*/ { "adc", TRUE, BYTE, op2(R, E), 0 },
535 /*11*/ { "adc", TRUE, LONG, op2(R, E), 0 },
536 /*12*/ { "adc", TRUE, BYTE, op2(E, R), 0 },
537 /*13*/ { "adc", TRUE, LONG, op2(E, R), 0 },
538 /*14*/ { "adc", FALSE, BYTE, op2(I, A), 0 },
539 /*15*/ { "adc", FALSE, LONG, op2(Is, A), 0 },
540 /*16*/ { "push", FALSE, NONE, op1(Si), 0 },
541 /*17*/ { "pop", FALSE, NONE, op1(Si), 0 },
542
543 /*18*/ { "sbb", TRUE, BYTE, op2(R, E), 0 },
544 /*19*/ { "sbb", TRUE, LONG, op2(R, E), 0 },
545 /*1a*/ { "sbb", TRUE, BYTE, op2(E, R), 0 },
546 /*1b*/ { "sbb", TRUE, LONG, op2(E, R), 0 },
547 /*1c*/ { "sbb", FALSE, BYTE, op2(I, A), 0 },
548 /*1d*/ { "sbb", FALSE, LONG, op2(Is, A), 0 },
549 /*1e*/ { "push", FALSE, NONE, op1(Si), 0 },
550 /*1f*/ { "pop", FALSE, NONE, op1(Si), 0 },
551
552 /*20*/ { "and", TRUE, BYTE, op2(R, E), 0 },
553 /*21*/ { "and", TRUE, LONG, op2(R, E), 0 },
554 /*22*/ { "and", TRUE, BYTE, op2(E, R), 0 },
555 /*23*/ { "and", TRUE, LONG, op2(E, R), 0 },
556 /*24*/ { "and", FALSE, BYTE, op2(I, A), 0 },
557 /*25*/ { "and", FALSE, LONG, op2(I, A), 0 },
558 /*26*/ { "", FALSE, NONE, 0, 0 },
559 /*27*/ { "daa", FALSE, NONE, 0, 0 },
560
561 /*28*/ { "sub", TRUE, BYTE, op2(R, E), 0 },
562 /*29*/ { "sub", TRUE, LONG, op2(R, E), 0 },
563 /*2a*/ { "sub", TRUE, BYTE, op2(E, R), 0 },
564 /*2b*/ { "sub", TRUE, LONG, op2(E, R), 0 },
565 /*2c*/ { "sub", FALSE, BYTE, op2(I, A), 0 },
566 /*2d*/ { "sub", FALSE, LONG, op2(Is, A), 0 },
567 /*2e*/ { "", FALSE, NONE, 0, 0 },
568 /*2f*/ { "das", FALSE, NONE, 0, 0 },
569
570 /*30*/ { "xor", TRUE, BYTE, op2(R, E), 0 },
571 /*31*/ { "xor", TRUE, LONG, op2(R, E), 0 },
572 /*32*/ { "xor", TRUE, BYTE, op2(E, R), 0 },
573 /*33*/ { "xor", TRUE, LONG, op2(E, R), 0 },
574 /*34*/ { "xor", FALSE, BYTE, op2(I, A), 0 },
575 /*35*/ { "xor", FALSE, LONG, op2(I, A), 0 },
576 /*36*/ { "", FALSE, NONE, 0, 0 },
577 /*37*/ { "aaa", FALSE, NONE, 0, 0 },
578
579 /*38*/ { "cmp", TRUE, BYTE, op2(R, E), 0 },
580 /*39*/ { "cmp", TRUE, LONG, op2(R, E), 0 },
581 /*3a*/ { "cmp", TRUE, BYTE, op2(E, R), 0 },
582 /*3b*/ { "cmp", TRUE, LONG, op2(E, R), 0 },
583 /*3c*/ { "cmp", FALSE, BYTE, op2(I, A), 0 },
584 /*3d*/ { "cmp", FALSE, LONG, op2(Is, A), 0 },
585 /*3e*/ { "", FALSE, NONE, 0, 0 },
586 /*3f*/ { "aas", FALSE, NONE, 0, 0 },
587
588 /*40*/ { "inc", FALSE, LONG, op1(Ri), 0 },
589 /*41*/ { "inc", FALSE, LONG, op1(Ri), 0 },
590 /*42*/ { "inc", FALSE, LONG, op1(Ri), 0 },
591 /*43*/ { "inc", FALSE, LONG, op1(Ri), 0 },
592 /*44*/ { "inc", FALSE, LONG, op1(Ri), 0 },
593 /*45*/ { "inc", FALSE, LONG, op1(Ri), 0 },
594 /*46*/ { "inc", FALSE, LONG, op1(Ri), 0 },
595 /*47*/ { "inc", FALSE, LONG, op1(Ri), 0 },
596
597 /*48*/ { "dec", FALSE, LONG, op1(Ri), 0 },
598 /*49*/ { "dec", FALSE, LONG, op1(Ri), 0 },
599 /*4a*/ { "dec", FALSE, LONG, op1(Ri), 0 },
600 /*4b*/ { "dec", FALSE, LONG, op1(Ri), 0 },
601 /*4c*/ { "dec", FALSE, LONG, op1(Ri), 0 },
602 /*4d*/ { "dec", FALSE, LONG, op1(Ri), 0 },
603 /*4e*/ { "dec", FALSE, LONG, op1(Ri), 0 },
604 /*4f*/ { "dec", FALSE, LONG, op1(Ri), 0 },
605
606 /*50*/ { "push", FALSE, LONG, op1(Ri), 0 },
607 /*51*/ { "push", FALSE, LONG, op1(Ri), 0 },
608 /*52*/ { "push", FALSE, LONG, op1(Ri), 0 },
609 /*53*/ { "push", FALSE, LONG, op1(Ri), 0 },
610 /*54*/ { "push", FALSE, LONG, op1(Ri), 0 },
611 /*55*/ { "push", FALSE, LONG, op1(Ri), 0 },
612 /*56*/ { "push", FALSE, LONG, op1(Ri), 0 },
613 /*57*/ { "push", FALSE, LONG, op1(Ri), 0 },
614
615 /*58*/ { "pop", FALSE, LONG, op1(Ri), 0 },
616 /*59*/ { "pop", FALSE, LONG, op1(Ri), 0 },
617 /*5a*/ { "pop", FALSE, LONG, op1(Ri), 0 },
618 /*5b*/ { "pop", FALSE, LONG, op1(Ri), 0 },
619 /*5c*/ { "pop", FALSE, LONG, op1(Ri), 0 },
620 /*5d*/ { "pop", FALSE, LONG, op1(Ri), 0 },
621 /*5e*/ { "pop", FALSE, LONG, op1(Ri), 0 },
622 /*5f*/ { "pop", FALSE, LONG, op1(Ri), 0 },
623
624 /*60*/ { "pusha", FALSE, LONG, 0, 0 },
625 /*61*/ { "popa", FALSE, LONG, 0, 0 },
626 /*62*/ { "bound", TRUE, LONG, op2(E, R), 0 },
627 /*63*/ { "arpl", TRUE, NONE, op2(Rw,Ew), 0 },
628
629 /*64*/ { "", FALSE, NONE, 0, 0 },
630 /*65*/ { "", FALSE, NONE, 0, 0 },
631 /*66*/ { "", FALSE, NONE, 0, 0 },
632 /*67*/ { "", FALSE, NONE, 0, 0 },
633
634 /*68*/ { "push", FALSE, LONG, op1(I), 0 },
635 /*69*/ { "imul", TRUE, LONG, op3(I,E,R), 0 },
636 /*6a*/ { "push", FALSE, LONG, op1(Ibs), 0 },
637 /*6b*/ { "imul", TRUE, LONG, op3(Ibs,E,R),0 },
638 /*6c*/ { "ins", FALSE, BYTE, op2(DX, DI), 0 },
639 /*6d*/ { "ins", FALSE, LONG, op2(DX, DI), 0 },
640 /*6e*/ { "outs", FALSE, BYTE, op2(SI, DX), 0 },
641 /*6f*/ { "outs", FALSE, LONG, op2(SI, DX), 0 },
642
643 /*70*/ { "jo", FALSE, NONE, op1(Db), 0 },
644 /*71*/ { "jno", FALSE, NONE, op1(Db), 0 },
645 /*72*/ { "jb", FALSE, NONE, op1(Db), 0 },
646 /*73*/ { "jnb", FALSE, NONE, op1(Db), 0 },
647 /*74*/ { "jz", FALSE, NONE, op1(Db), 0 },
648 /*75*/ { "jnz", FALSE, NONE, op1(Db), 0 },
649 /*76*/ { "jbe", FALSE, NONE, op1(Db), 0 },
650 /*77*/ { "jnbe", FALSE, NONE, op1(Db), 0 },
651
652 /*78*/ { "js", FALSE, NONE, op1(Db), 0 },
653 /*79*/ { "jns", FALSE, NONE, op1(Db), 0 },
654 /*7a*/ { "jp", FALSE, NONE, op1(Db), 0 },
655 /*7b*/ { "jnp", FALSE, NONE, op1(Db), 0 },
656 /*7c*/ { "jl", FALSE, NONE, op1(Db), 0 },
657 /*7d*/ { "jnl", FALSE, NONE, op1(Db), 0 },
658 /*7e*/ { "jle", FALSE, NONE, op1(Db), 0 },
659 /*7f*/ { "jnle", FALSE, NONE, op1(Db), 0 },
660
661 /*80*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 },
662 /*81*/ { "", TRUE, LONG, op2(I, E), db_Grp1 },
663 /*82*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 },
664 /*83*/ { "", TRUE, LONG, op2(Ibs,E), db_Grp1 },
665 /*84*/ { "test", TRUE, BYTE, op2(R, E), 0 },
666 /*85*/ { "test", TRUE, LONG, op2(R, E), 0 },
667 /*86*/ { "xchg", TRUE, BYTE, op2(R, E), 0 },
668 /*87*/ { "xchg", TRUE, LONG, op2(R, E), 0 },
669
670 /*88*/ { "mov", TRUE, BYTE, op2(R, E), 0 },
671 /*89*/ { "mov", TRUE, LONG, op2(R, E), 0 },
672 /*8a*/ { "mov", TRUE, BYTE, op2(E, R), 0 },
673 /*8b*/ { "mov", TRUE, LONG, op2(E, R), 0 },
674 /*8c*/ { "mov", TRUE, NONE, op2(S, Ew), 0 },
675 /*8d*/ { "lea", TRUE, LONG, op2(E, R), 0 },
676 /*8e*/ { "mov", TRUE, NONE, op2(Ew, S), 0 },
677 /*8f*/ { "pop", TRUE, LONG, op1(E), 0 },
678
679 /*90*/ { "nop", FALSE, NONE, 0, 0 },
680 /*91*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
681 /*92*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
682 /*93*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
683 /*94*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
684 /*95*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
685 /*96*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
686 /*97*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
687
688 /*98*/ { "cbw", FALSE, SDEP, 0, "cwde" }, /* cbw/cwde */
689 /*99*/ { "cwd", FALSE, SDEP, 0, "cdq" }, /* cwd/cdq */
690 /*9a*/ { "lcall", FALSE, NONE, op1(OS), 0 },
691 /*9b*/ { "wait", FALSE, NONE, 0, 0 },
692 /*9c*/ { "pushf", FALSE, LONG, 0, 0 },
693 /*9d*/ { "popf", FALSE, LONG, 0, 0 },
694 /*9e*/ { "sahf", FALSE, NONE, 0, 0 },
695 /*9f*/ { "lahf", FALSE, NONE, 0, 0 },
696
697 /*a0*/ { "mov", FALSE, BYTE, op2(O, A), 0 },
698 /*a1*/ { "mov", FALSE, LONG, op2(O, A), 0 },
699 /*a2*/ { "mov", FALSE, BYTE, op2(A, O), 0 },
700 /*a3*/ { "mov", FALSE, LONG, op2(A, O), 0 },
701 /*a4*/ { "movs", FALSE, BYTE, op2(SI,DI), 0 },
702 /*a5*/ { "movs", FALSE, LONG, op2(SI,DI), 0 },
703 /*a6*/ { "cmps", FALSE, BYTE, op2(SI,DI), 0 },
704 /*a7*/ { "cmps", FALSE, LONG, op2(SI,DI), 0 },
705
706 /*a8*/ { "test", FALSE, BYTE, op2(I, A), 0 },
707 /*a9*/ { "test", FALSE, LONG, op2(I, A), 0 },
708 /*aa*/ { "stos", FALSE, BYTE, op1(DI), 0 },
709 /*ab*/ { "stos", FALSE, LONG, op1(DI), 0 },
710 /*ac*/ { "lods", FALSE, BYTE, op1(SI), 0 },
711 /*ad*/ { "lods", FALSE, LONG, op1(SI), 0 },
712 /*ae*/ { "scas", FALSE, BYTE, op1(SI), 0 },
713 /*af*/ { "scas", FALSE, LONG, op1(SI), 0 },
714
715 /*b0*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
716 /*b1*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
717 /*b2*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
718 /*b3*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
719 /*b4*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
720 /*b5*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
721 /*b6*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
722 /*b7*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
723
724 /*b8*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
725 /*b9*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
726 /*ba*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
727 /*bb*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
728 /*bc*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
729 /*bd*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
730 /*be*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
731 /*bf*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
732
733 /*c0*/ { "", TRUE, BYTE, op2(Ib, E), db_Grp2 },
734 /*c1*/ { "", TRUE, LONG, op2(Ib, E), db_Grp2 },
735 /*c2*/ { "ret", FALSE, NONE, op1(Iw), 0 },
736 /*c3*/ { "ret", FALSE, NONE, 0, 0 },
737 /*c4*/ { "les", TRUE, LONG, op2(E, R), 0 },
738 /*c5*/ { "lds", TRUE, LONG, op2(E, R), 0 },
739 /*c6*/ { "mov", TRUE, BYTE, op2(I, E), 0 },
740 /*c7*/ { "mov", TRUE, LONG, op2(I, E), 0 },
741
742 /*c8*/ { "enter", FALSE, NONE, op2(Iw, Ib), 0 },
743 /*c9*/ { "leave", FALSE, NONE, 0, 0 },
744 /*ca*/ { "lret", FALSE, NONE, op1(Iw), 0 },
745 /*cb*/ { "lret", FALSE, NONE, 0, 0 },
746 /*cc*/ { "int", FALSE, NONE, op1(o3), 0 },
747 /*cd*/ { "int", FALSE, NONE, op1(Ib), 0 },
748 /*ce*/ { "into", FALSE, NONE, 0, 0 },
749 /*cf*/ { "iret", FALSE, NONE, 0, 0 },
750
751 /*d0*/ { "", TRUE, BYTE, op2(o1, E), db_Grp2 },
752 /*d1*/ { "", TRUE, LONG, op2(o1, E), db_Grp2 },
753 /*d2*/ { "", TRUE, BYTE, op2(CL, E), db_Grp2 },
754 /*d3*/ { "", TRUE, LONG, op2(CL, E), db_Grp2 },
755 /*d4*/ { "aam", FALSE, NONE, op1(Iba), 0 },
756 /*d5*/ { "aad", FALSE, NONE, op1(Iba), 0 },
757 /*d6*/ { ".byte\t0xd6", FALSE, NONE, 0, 0 },
758 /*d7*/ { "xlat", FALSE, BYTE, op1(BX), 0 },
759
760 /*d8*/ { "", TRUE, NONE, 0, db_Esc8 },
761 /*d9*/ { "", TRUE, NONE, 0, db_Esc9 },
762 /*da*/ { "", TRUE, NONE, 0, db_Esca },
763 /*db*/ { "", TRUE, NONE, 0, db_Escb },
764 /*dc*/ { "", TRUE, NONE, 0, db_Escc },
765 /*dd*/ { "", TRUE, NONE, 0, db_Escd },
766 /*de*/ { "", TRUE, NONE, 0, db_Esce },
767 /*df*/ { "", TRUE, NONE, 0, db_Escf },
768
769 /*e0*/ { "loopne",FALSE, NONE, op1(Db), 0 },
770 /*e1*/ { "loope", FALSE, NONE, op1(Db), 0 },
771 /*e2*/ { "loop", FALSE, NONE, op1(Db), 0 },
772 /*e3*/ { "jcxz", FALSE, SDEP, op1(Db), "jecxz" },
773 /*e4*/ { "in", FALSE, BYTE, op2(Ib, A), 0 },
774 /*e5*/ { "in", FALSE, LONG, op2(Ib, A) , 0 },
775 /*e6*/ { "out", FALSE, BYTE, op2(A, Ib), 0 },
776 /*e7*/ { "out", FALSE, LONG, op2(A, Ib) , 0 },
777
778 /*e8*/ { "call", FALSE, NONE, op1(Dl), 0 },
779 /*e9*/ { "jmp", FALSE, NONE, op1(Dl), 0 },
780 /*ea*/ { "ljmp", FALSE, NONE, op1(OS), 0 },
781 /*eb*/ { "jmp", FALSE, NONE, op1(Db), 0 },
782 /*ec*/ { "in", FALSE, BYTE, op2(DX, A), 0 },
783 /*ed*/ { "in", FALSE, LONG, op2(DX, A) , 0 },
784 /*ee*/ { "out", FALSE, BYTE, op2(A, DX), 0 },
785 /*ef*/ { "out", FALSE, LONG, op2(A, DX) , 0 },
786
787 /*f0*/ { "", FALSE, NONE, 0, 0 },
788 /*f1*/ { ".byte\t0xf1", FALSE, NONE, 0, 0 },
789 /*f2*/ { "", FALSE, NONE, 0, 0 },
790 /*f3*/ { "", FALSE, NONE, 0, 0 },
791 /*f4*/ { "hlt", FALSE, NONE, 0, 0 },
792 /*f5*/ { "cmc", FALSE, NONE, 0, 0 },
793 /*f6*/ { "", TRUE, BYTE, 0, db_Grp3 },
794 /*f7*/ { "", TRUE, LONG, 0, db_Grp3 },
795
796 /*f8*/ { "clc", FALSE, NONE, 0, 0 },
797 /*f9*/ { "stc", FALSE, NONE, 0, 0 },
798 /*fa*/ { "cli", FALSE, NONE, 0, 0 },
799 /*fb*/ { "sti", FALSE, NONE, 0, 0 },
800 /*fc*/ { "cld", FALSE, NONE, 0, 0 },
801 /*fd*/ { "std", FALSE, NONE, 0, 0 },
802 /*fe*/ { "", TRUE, NONE, 0, db_Grp4 },
803 /*ff*/ { "", TRUE, NONE, 0, db_Grp5 },
804 };
805
806 static const struct inst db_bad_inst =
807 { "???", FALSE, NONE, 0, 0 }
808 ;
809
810 #define f_mod(byte) ((byte)>>6)
811 #define f_reg(byte) (((byte)>>3)&0x7)
812 #define f_rm(byte) ((byte)&0x7)
813
814 #define sib_ss(byte) ((byte)>>6)
815 #define sib_index(byte) (((byte)>>3)&0x7)
816 #define sib_base(byte) ((byte)&0x7)
817
818 struct i_addr {
819 int is_reg; /* if reg, reg number is in 'disp' */
820 int disp;
821 const char * base;
822 const char * index;
823 int ss;
824 int defss; /* default stack segment */
825 };
826
827 static const char * const db_index_reg_16[8] = {
828 "%bx,%si",
829 "%bx,%di",
830 "%bp,%si",
831 "%bp,%di",
832 "%si",
833 "%di",
834 "%bp",
835 "%bx"
836 };
837
838 static const char * const db_reg[3][8] = {
839 { "%al", "%cl", "%dl", "%bl", "%ah", "%ch", "%dh", "%bh" },
840 { "%ax", "%cx", "%dx", "%bx", "%sp", "%bp", "%si", "%di" },
841 { "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi" }
842 };
843
844 static const char * const db_seg_reg[8] = {
845 "%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", ""
846 };
847
848 /*
849 * lengths for size attributes
850 */
851 static const int db_lengths[] = {
852 1, /* BYTE */
853 2, /* WORD */
854 4, /* LONG */
855 8, /* QUAD */
856 4, /* SNGL */
857 8, /* DBLR */
858 10, /* EXTR */
859 };
860
861 #define get_value_inc(result, loc, size, is_signed) \
862 result = db_get_value((loc), (size), (is_signed)); \
863 (loc) += (size);
864
865 static db_addr_t
866 db_disasm_esc (db_addr_t loc, int inst, int short_addr,
867 int size, const char *seg);
868 static void db_print_address (const char *seg, int size,
869 struct i_addr *addrp);
870 static db_addr_t
871 db_read_address (db_addr_t loc, int short_addr,
872 int regmodrm, struct i_addr *addrp);
873
874 /*
875 * Read address at location and return updated location.
876 */
877 static db_addr_t
878 db_read_address(db_addr_t loc, int short_addr, int regmodrm,
879 struct i_addr *addrp)
880 {
881 int mod, rm, sib, index, disp;
882
883 mod = f_mod(regmodrm);
884 rm = f_rm(regmodrm);
885
886 if (mod == 3) {
887 addrp->is_reg = TRUE;
888 addrp->disp = rm;
889 return (loc);
890 }
891 addrp->is_reg = FALSE;
892 addrp->index = 0;
893 addrp->ss = 0;
894 addrp->defss = 0;
895
896 if (short_addr) {
897 if (mod != 3) {
898 switch(rm) {
899 case 0:
900 case 1:
901 addrp->index = "%bx";
902 break;
903 case 2:
904 case 3:
905 addrp->index = "%bp";
906 addrp->defss = 1;
907 break;
908 case 6:
909 if (mod == 1 || mod == 2)
910 addrp->defss = 1;
911 break;
912 }
913 }
914 switch (mod) {
915 case 0:
916 if (rm == 6) {
917 get_value_inc(disp, loc, 2, FALSE);
918 addrp->disp = disp;
919 addrp->base = 0;
920 }
921 else {
922 addrp->disp = 0;
923 addrp->base = db_index_reg_16[rm];
924 }
925 break;
926 case 1:
927 get_value_inc(disp, loc, 1, TRUE);
928 disp &= 0xFFFF;
929 addrp->disp = disp;
930 addrp->base = db_index_reg_16[rm];
931 break;
932 case 2:
933 get_value_inc(disp, loc, 2, FALSE);
934 addrp->disp = disp;
935 addrp->base = db_index_reg_16[rm];
936 break;
937 }
938 } else {
939 if (mod != 3 && rm == 4) {
940 get_value_inc(sib, loc, 1, FALSE);
941 rm = sib_base(sib);
942 index = sib_index(sib);
943 if (index != 4)
944 addrp->index = db_reg[LONG][index];
945 addrp->ss = sib_ss(sib);
946 }
947
948 switch (mod) {
949 case 0:
950 if (rm == 5) {
951 get_value_inc(addrp->disp, loc, 4, FALSE);
952 addrp->base = 0;
953 }
954 else {
955 addrp->disp = 0;
956 addrp->base = db_reg[LONG][rm];
957 }
958 break;
959
960 case 1:
961 get_value_inc(disp, loc, 1, TRUE);
962 addrp->disp = disp;
963 addrp->base = db_reg[LONG][rm];
964 break;
965
966 case 2:
967 get_value_inc(disp, loc, 4, FALSE);
968 addrp->disp = disp;
969 addrp->base = db_reg[LONG][rm];
970 break;
971 }
972 }
973 return (loc);
974 }
975
976 static void
977 db_print_address(const char *seg, int size, struct i_addr *addrp)
978 {
979 if (addrp->is_reg) {
980 db_printf("%s", db_reg[size][addrp->disp]);
981 return;
982 }
983
984 if (seg) {
985 db_printf("%s:", seg);
986 } else if (addrp->defss) {
987 db_printf("%%ss:");
988 }
989
990 db_printsym((db_addr_t)addrp->disp, DB_STGY_ANY);
991 if (addrp->base != 0 || addrp->index != 0) {
992 db_printf("(");
993 if (addrp->base)
994 db_printf("%s", addrp->base);
995 if (addrp->index)
996 db_printf(",%s,%d", addrp->index, 1<<addrp->ss);
997 db_printf(")");
998 }
999 }
1000
1001 /*
1002 * Disassemble floating-point ("escape") instruction
1003 * and return updated location.
1004 */
1005 static db_addr_t
1006 db_disasm_esc(db_addr_t loc, int inst, int short_addr, int size,
1007 const char *seg)
1008 {
1009 int regmodrm;
1010 const struct finst * fp;
1011 int mod;
1012 struct i_addr address;
1013 const char * name;
1014
1015 get_value_inc(regmodrm, loc, 1, FALSE);
1016 fp = &db_Esc_inst[inst - 0xd8][f_reg(regmodrm)];
1017 mod = f_mod(regmodrm);
1018 if (mod != 3) {
1019 if (*fp->f_name == '\0') {
1020 db_printf("<bad instruction>");
1021 return (loc);
1022 }
1023 /*
1024 * Normal address modes.
1025 */
1026 loc = db_read_address(loc, short_addr, regmodrm, &address);
1027 db_printf("%s", fp->f_name);
1028 switch(fp->f_size) {
1029 case SNGL:
1030 db_printf("s");
1031 break;
1032 case DBLR:
1033 db_printf("l");
1034 break;
1035 case EXTR:
1036 db_printf("t");
1037 break;
1038 case WORD:
1039 db_printf("s");
1040 break;
1041 case LONG:
1042 db_printf("l");
1043 break;
1044 case QUAD:
1045 db_printf("q");
1046 break;
1047 default:
1048 break;
1049 }
1050 db_printf("\t");
1051 db_print_address(seg, BYTE, &address);
1052 }
1053 else {
1054 /*
1055 * 'reg-reg' - special formats
1056 */
1057 switch (fp->f_rrmode) {
1058 case op2(ST,STI):
1059 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1060 db_printf("%s\t%%st,%%st(%d)",name,f_rm(regmodrm));
1061 break;
1062 case op2(STI,ST):
1063 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1064 db_printf("%s\t%%st(%d),%%st",name, f_rm(regmodrm));
1065 break;
1066 case op1(STI):
1067 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1068 db_printf("%s\t%%st(%d)",name, f_rm(regmodrm));
1069 break;
1070 case op1(X):
1071 name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)];
1072 if (*name == '\0')
1073 goto bad;
1074 db_printf("%s", name);
1075 break;
1076 case op1(XA):
1077 name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)];
1078 if (*name == '\0')
1079 goto bad;
1080 db_printf("%s\t%%ax", name);
1081 break;
1082 default:
1083 bad:
1084 db_printf("<bad instruction>");
1085 break;
1086 }
1087 }
1088
1089 return (loc);
1090 }
1091
1092 /*
1093 * Disassemble instruction at 'loc'. 'altfmt' specifies an
1094 * (optional) alternate format. Return the address of the
1095 * start of the next instruction.
1096 *
1097 * If regs is non-null it may be used to obtain context, such as
1098 * whether we are in word or long mode.
1099 */
1100 db_addr_t
1101 db_disasm(db_addr_t loc, boolean_t altfmt, db_regs_t *regs)
1102 {
1103 int inst;
1104 int size;
1105 int short_addr;
1106 const char * seg;
1107 const struct inst * ip;
1108 const char * i_name;
1109 int i_size;
1110 int i_mode;
1111 int regmodrm = 0;
1112 boolean_t first;
1113 int displ;
1114 int prefix;
1115 int imm;
1116 int imm2;
1117 int len;
1118 struct i_addr address;
1119
1120 get_value_inc(inst, loc, 1, FALSE);
1121 seg = 0;
1122
1123 if (regs && gdt[mycpu->gd_cpuid * NGDT + IDXSEL(regs->tf_cs & 0xFFFF)].sd.sd_def32 == 0) {
1124 size = WORD;
1125 short_addr = TRUE;
1126 } else {
1127 size = LONG;
1128 short_addr = FALSE;
1129 }
1130
1131 /*
1132 * Get prefixes
1133 */
1134 prefix = TRUE;
1135 do {
1136 switch (inst) {
1137 case 0x66: /* data16 */
1138 size = WORD;
1139 break;
1140 case 0x67:
1141 short_addr = TRUE;
1142 break;
1143 case 0x26:
1144 seg = "%es";
1145 break;
1146 case 0x36:
1147 seg = "%ss";
1148 break;
1149 case 0x2e:
1150 seg = "%cs";
1151 break;
1152 case 0x3e:
1153 seg = "%ds";
1154 break;
1155 case 0x64:
1156 seg = "%fs";
1157 break;
1158 case 0x65:
1159 seg = "%gs";
1160 break;
1161 case 0xf0:
1162 db_printf("lock ");
1163 break;
1164 case 0xf2:
1165 db_printf("repne ");
1166 break;
1167 case 0xf3:
1168 db_printf("repe "); /* XXX repe VS rep */
1169 break;
1170 default:
1171 prefix = FALSE;
1172 break;
1173 }
1174 if (prefix) {
1175 get_value_inc(inst, loc, 1, FALSE);
1176 }
1177 } while (prefix);
1178
1179 if (inst >= 0xd8 && inst <= 0xdf) {
1180 loc = db_disasm_esc(loc, inst, short_addr, size, seg);
1181 db_printf("\n");
1182 return (loc);
1183 }
1184
1185 if (inst == 0x0f) {
1186 get_value_inc(inst, loc, 1, FALSE);
1187 ip = db_inst_0f[inst>>4];
1188 if (ip == 0) {
1189 ip = &db_bad_inst;
1190 }
1191 else {
1192 ip = &ip[inst&0xf];
1193 }
1194 }
1195 else
1196 ip = &db_inst_table[inst];
1197
1198 if (ip->i_has_modrm) {
1199 get_value_inc(regmodrm, loc, 1, FALSE);
1200 loc = db_read_address(loc, short_addr, regmodrm, &address);
1201 }
1202
1203 i_name = ip->i_name;
1204 i_size = ip->i_size;
1205 i_mode = ip->i_mode;
1206
1207 if (ip->i_extra == db_Grp1 || ip->i_extra == db_Grp2 ||
1208 ip->i_extra == db_Grp6 || ip->i_extra == db_Grp7 ||
1209 ip->i_extra == db_Grp8 || ip->i_extra == db_Grp9) {
1210 i_name = ((const char * const *)ip->i_extra)[f_reg(regmodrm)];
1211 }
1212 else if (ip->i_extra == db_Grp3) {
1213 ip = ip->i_extra;
1214 ip = &ip[f_reg(regmodrm)];
1215 i_name = ip->i_name;
1216 i_mode = ip->i_mode;
1217 }
1218 else if (ip->i_extra == db_Grp4 || ip->i_extra == db_Grp5) {
1219 ip = ip->i_extra;
1220 ip = &ip[f_reg(regmodrm)];
1221 i_name = ip->i_name;
1222 i_mode = ip->i_mode;
1223 i_size = ip->i_size;
1224 }
1225
1226 if (i_size == SDEP) {
1227 if (size == WORD)
1228 db_printf("%s", i_name);
1229 else
1230 db_printf("%s", (const char *)ip->i_extra);
1231 }
1232 else {
1233 db_printf("%s", i_name);
1234 if (i_size != NONE) {
1235 if (i_size == BYTE) {
1236 db_printf("b");
1237 size = BYTE;
1238 }
1239 else if (i_size == WORD) {
1240 db_printf("w");
1241 size = WORD;
1242 }
1243 else if (size == WORD)
1244 db_printf("w");
1245 else
1246 db_printf("l");
1247 }
1248 }
1249 db_printf("\t");
1250 for (first = TRUE;
1251 i_mode != 0;
1252 i_mode >>= 8, first = FALSE)
1253 {
1254 if (!first)
1255 db_printf(",");
1256
1257 switch (i_mode & 0xFF) {
1258
1259 case E:
1260 db_print_address(seg, size, &address);
1261 break;
1262
1263 case Eind:
1264 db_printf("*");
1265 db_print_address(seg, size, &address);
1266 break;
1267
1268 case El:
1269 db_print_address(seg, LONG, &address);
1270 break;
1271
1272 case Ew:
1273 db_print_address(seg, WORD, &address);
1274 break;
1275
1276 case Eb:
1277 db_print_address(seg, BYTE, &address);
1278 break;
1279
1280 case R:
1281 db_printf("%s", db_reg[size][f_reg(regmodrm)]);
1282 break;
1283
1284 case Rw:
1285 db_printf("%s", db_reg[WORD][f_reg(regmodrm)]);
1286 break;
1287
1288 case Ri:
1289 db_printf("%s", db_reg[size][f_rm(inst)]);
1290 break;
1291
1292 case Ril:
1293 db_printf("%s", db_reg[LONG][f_rm(inst)]);
1294 break;
1295
1296 case S:
1297 db_printf("%s", db_seg_reg[f_reg(regmodrm)]);
1298 break;
1299
1300 case Si:
1301 db_printf("%s", db_seg_reg[f_reg(inst)]);
1302 break;
1303
1304 case A:
1305 db_printf("%s", db_reg[size][0]); /* acc */
1306 break;
1307
1308 case BX:
1309 if (seg)
1310 db_printf("%s:", seg);
1311 db_printf("(%s)", short_addr ? "%bx" : "%ebx");
1312 break;
1313
1314 case CL:
1315 db_printf("%%cl");
1316 break;
1317
1318 case DX:
1319 db_printf("%%dx");
1320 break;
1321
1322 case SI:
1323 if (seg)
1324 db_printf("%s:", seg);
1325 db_printf("(%s)", short_addr ? "%si" : "%esi");
1326 break;
1327
1328 case DI:
1329 db_printf("%%es:(%s)", short_addr ? "%di" : "%edi");
1330 break;
1331
1332 case CR:
1333 db_printf("%%cr%d", f_reg(regmodrm));
1334 break;
1335
1336 case DR:
1337 db_printf("%%dr%d", f_reg(regmodrm));
1338 break;
1339
1340 case TR:
1341 db_printf("%%tr%d", f_reg(regmodrm));
1342 break;
1343
1344 case I:
1345 len = db_lengths[size];
1346 get_value_inc(imm, loc, len, FALSE);
1347 db_printf("$%#r", imm);
1348 break;
1349
1350 case Is:
1351 len = db_lengths[size];
1352 get_value_inc(imm, loc, len, FALSE);
1353 db_printf("$%+#r", imm);
1354 break;
1355
1356 case Ib:
1357 get_value_inc(imm, loc, 1, FALSE);
1358 db_printf("$%#r", imm);
1359 break;
1360
1361 case Iba:
1362 get_value_inc(imm, loc, 1, FALSE);
1363 if (imm != 0x0a)
1364 db_printf("$%#r", imm);
1365 break;
1366
1367 case Ibs:
1368 get_value_inc(imm, loc, 1, TRUE);
1369 if (size == WORD)
1370 imm &= 0xFFFF;
1371 db_printf("$%+#r", imm);
1372 break;
1373
1374 case Iw:
1375 get_value_inc(imm, loc, 2, FALSE);
1376 db_printf("$%#r", imm);
1377 break;
1378
1379 case O:
1380 len = (short_addr ? 2 : 4);
1381 get_value_inc(displ, loc, len, FALSE);
1382 if (seg)
1383 db_printf("%s:%+#r",seg, displ);
1384 else
1385 db_printsym((db_addr_t)displ, DB_STGY_ANY);
1386 break;
1387
1388 case Db:
1389 get_value_inc(displ, loc, 1, TRUE);
1390 displ += loc;
1391 if (size == WORD)
1392 displ &= 0xFFFF;
1393 db_printsym((db_addr_t)displ, DB_STGY_XTRN);
1394 break;
1395
1396 case Dl:
1397 len = db_lengths[size];
1398 get_value_inc(displ, loc, len, FALSE);
1399 displ += loc;
1400 if (size == WORD)
1401 displ &= 0xFFFF;
1402 db_printsym((db_addr_t)displ, DB_STGY_XTRN);
1403 break;
1404
1405 case o1:
1406 db_printf("$1");
1407 break;
1408
1409 case o3:
1410 db_printf("$3");
1411 break;
1412
1413 case OS:
1414 len = db_lengths[size];
1415 get_value_inc(imm, loc, len, FALSE); /* offset */
1416 get_value_inc(imm2, loc, 2, FALSE); /* segment */
1417 db_printf("$%#r,%#r", imm2, imm);
1418 break;
1419 }
1420 }
1421 db_printf("\n");
1422 return (loc);
1423 }
DragonFly BSD