2 * Mach Operating System
3 * Copyright (c) 1991,1990 Carnegie Mellon University
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.
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.
16 * Carnegie Mellon requests users of this software to return to
18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
19 * School of Computer Science
20 * Carnegie Mellon University
21 * Pittsburgh PA 15213-3890
23 * any improvements or extensions that they make and grant Carnegie the
24 * rights to redistribute these changes.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
31 * Instruction disassembler.
33 #include <sys/param.h>
37 #include <ddb/db_access.h>
38 #include <ddb/db_sym.h>
56 #define E 1 /* general effective address */
57 #define Eind 2 /* indirect address (jump, call) */
58 #define Ew 3 /* address, word size */
59 #define Eb 4 /* address, byte size */
60 #define R 5 /* register, in 'reg' field */
61 #define Rw 6 /* word register, in 'reg' field */
62 #define Ri 7 /* register in instruction */
63 #define S 8 /* segment reg, in 'reg' field */
64 #define Si 9 /* segment reg, in instruction */
65 #define A 10 /* accumulator */
66 #define BX 11 /* (bx) */
67 #define CL 12 /* cl, for shifts */
68 #define DX 13 /* dx, for IO */
69 #define SI 14 /* si */
70 #define DI 15 /* di */
71 #define CR 16 /* control register */
72 #define DR 17 /* debug register */
73 #define TR 18 /* test register */
74 #define I 19 /* immediate, unsigned */
75 #define Is 20 /* immediate, signed */
76 #define Ib 21 /* byte immediate, unsigned */
77 #define Ibs 22 /* byte immediate, signed */
78 #define Iw 23 /* word immediate, unsigned */
79 #define O 25 /* direct address */
80 #define Db 26 /* byte displacement from EIP */
81 #define Dl 27 /* long displacement from EIP */
82 #define o1 28 /* constant 1 */
83 #define o3 29 /* constant 3 */
84 #define OS 30 /* immediate offset/segment */
85 #define ST 31 /* FP stack top */
86 #define STI 32 /* FP stack */
87 #define X 33 /* extended FP op */
88 #define XA 34 /* for 'fstcw %ax' */
89 #define El 35 /* address, long size */
90 #define Ril 36 /* long register in instruction */
91 #define Iba 37 /* byte immediate, don't print if 0xa */
94 const char * i_name; /* name */
95 short i_has_modrm; /* has regmodrm byte */
96 short i_size; /* operand size */
97 int i_mode; /* addressing modes */
98 const void * i_extra; /* pointer to extra opcode table */
102 #define op2(x,y) ((x)|((y)<<8))
103 #define op3(x,y,z) ((x)|((y)<<8)|((z)<<16))
106 const char * f_name; /* name for memory instruction */
107 int f_size; /* size for memory instruction */
108 int f_rrmode; /* mode for rr instruction */
109 const void * f_rrname; /* name for rr instruction
110 (or pointer to table) */
113 static const char * const db_Grp6[] = {
124 static const char * const db_Grp7[] = {
135 static const char * const db_Grp8[] = {
146 static const char * const db_Grp9[] = {
157 static const char * const db_Grp15[] = {
168 static const char * const db_Grp15b[] = {
179 static const struct inst db_inst_0f0x[] = {
180 /*00*/ { "", TRUE, NONE, op1(Ew), db_Grp6 },
181 /*01*/ { "", TRUE, NONE, op1(Ew), db_Grp7 },
182 /*02*/ { "lar", TRUE, LONG, op2(E,R), 0 },
183 /*03*/ { "lsl", TRUE, LONG, op2(E,R), 0 },
184 /*04*/ { "", FALSE, NONE, 0, 0 },
185 /*05*/ { "syscall",FALSE,NONE, 0, 0 },
186 /*06*/ { "clts", FALSE, NONE, 0, 0 },
187 /*07*/ { "sysret",FALSE, NONE, 0, 0 },
189 /*08*/ { "invd", FALSE, NONE, 0, 0 },
190 /*09*/ { "wbinvd",FALSE, NONE, 0, 0 },
191 /*0a*/ { "", FALSE, NONE, 0, 0 },
192 /*0b*/ { "", FALSE, NONE, 0, 0 },
193 /*0c*/ { "", FALSE, NONE, 0, 0 },
194 /*0d*/ { "", FALSE, NONE, 0, 0 },
195 /*0e*/ { "", FALSE, NONE, 0, 0 },
196 /*0f*/ { "", FALSE, NONE, 0, 0 },
199 static const struct inst db_inst_0f1x[] = {
200 /*10*/ { "", FALSE, NONE, 0, 0 },
201 /*11*/ { "", FALSE, NONE, 0, 0 },
202 /*12*/ { "", FALSE, NONE, 0, 0 },
203 /*13*/ { "", FALSE, NONE, 0, 0 },
204 /*14*/ { "", FALSE, NONE, 0, 0 },
205 /*15*/ { "", FALSE, NONE, 0, 0 },
206 /*16*/ { "", FALSE, NONE, 0, 0 },
207 /*17*/ { "", FALSE, NONE, 0, 0 },
209 /*18*/ { "", FALSE, NONE, 0, 0 },
210 /*19*/ { "", FALSE, NONE, 0, 0 },
211 /*1a*/ { "", FALSE, NONE, 0, 0 },
212 /*1b*/ { "", FALSE, NONE, 0, 0 },
213 /*1c*/ { "", FALSE, NONE, 0, 0 },
214 /*1d*/ { "", FALSE, NONE, 0, 0 },
215 /*1e*/ { "", FALSE, NONE, 0, 0 },
216 /*1f*/ { "nopl", TRUE, SDEP, 0, "nopw" },
219 static const struct inst db_inst_0f2x[] = {
220 /*20*/ { "mov", TRUE, LONG, op2(CR,El), 0 },
221 /*21*/ { "mov", TRUE, LONG, op2(DR,El), 0 },
222 /*22*/ { "mov", TRUE, LONG, op2(El,CR), 0 },
223 /*23*/ { "mov", TRUE, LONG, op2(El,DR), 0 },
224 /*24*/ { "mov", TRUE, LONG, op2(TR,El), 0 },
225 /*25*/ { "", FALSE, NONE, 0, 0 },
226 /*26*/ { "mov", TRUE, LONG, op2(El,TR), 0 },
227 /*27*/ { "", FALSE, NONE, 0, 0 },
229 /*28*/ { "", FALSE, NONE, 0, 0 },
230 /*29*/ { "", FALSE, NONE, 0, 0 },
231 /*2a*/ { "", FALSE, NONE, 0, 0 },
232 /*2b*/ { "", FALSE, NONE, 0, 0 },
233 /*2c*/ { "", FALSE, NONE, 0, 0 },
234 /*2d*/ { "", FALSE, NONE, 0, 0 },
235 /*2e*/ { "", FALSE, NONE, 0, 0 },
236 /*2f*/ { "", FALSE, NONE, 0, 0 },
239 static const struct inst db_inst_0f3x[] = {
240 /*30*/ { "wrmsr", FALSE, NONE, 0, 0 },
241 /*31*/ { "rdtsc", FALSE, NONE, 0, 0 },
242 /*32*/ { "rdmsr", FALSE, NONE, 0, 0 },
243 /*33*/ { "rdpmc", FALSE, NONE, 0, 0 },
244 /*34*/ { "sysenter",FALSE,NONE, 0, 0 },
245 /*35*/ { "sysexit",FALSE,NONE, 0, 0 },
246 /*36*/ { "", FALSE, NONE, 0, 0 },
247 /*37*/ { "getsec",FALSE, NONE, 0, 0 },
249 /*38*/ { "", FALSE, NONE, 0, 0 },
250 /*39*/ { "", FALSE, NONE, 0, 0 },
251 /*3a*/ { "", FALSE, NONE, 0, 0 },
252 /*3b*/ { "", FALSE, NONE, 0, 0 },
253 /*3c*/ { "", FALSE, NONE, 0, 0 },
254 /*3d*/ { "", FALSE, NONE, 0, 0 },
255 /*3e*/ { "", FALSE, NONE, 0, 0 },
256 /*3f*/ { "", FALSE, NONE, 0, 0 },
259 static const struct inst db_inst_0f4x[] = {
260 /*40*/ { "cmovo", TRUE, NONE, op2(E, R), 0 },
261 /*41*/ { "cmovno", TRUE, NONE, op2(E, R), 0 },
262 /*42*/ { "cmovb", TRUE, NONE, op2(E, R), 0 },
263 /*43*/ { "cmovnb", TRUE, NONE, op2(E, R), 0 },
264 /*44*/ { "cmovz", TRUE, NONE, op2(E, R), 0 },
265 /*45*/ { "cmovnz", TRUE, NONE, op2(E, R), 0 },
266 /*46*/ { "cmovbe", TRUE, NONE, op2(E, R), 0 },
267 /*47*/ { "cmovnbe",TRUE, NONE, op2(E, R), 0 },
269 /*48*/ { "cmovs", TRUE, NONE, op2(E, R), 0 },
270 /*49*/ { "cmovns", TRUE, NONE, op2(E, R), 0 },
271 /*4a*/ { "cmovp", TRUE, NONE, op2(E, R), 0 },
272 /*4b*/ { "cmovnp", TRUE, NONE, op2(E, R), 0 },
273 /*4c*/ { "cmovl", TRUE, NONE, op2(E, R), 0 },
274 /*4d*/ { "cmovnl", TRUE, NONE, op2(E, R), 0 },
275 /*4e*/ { "cmovle", TRUE, NONE, op2(E, R), 0 },
276 /*4f*/ { "cmovnle",TRUE, NONE, op2(E, R), 0 },
279 static const struct inst db_inst_0f8x[] = {
280 /*80*/ { "jo", FALSE, NONE, op1(Dl), 0 },
281 /*81*/ { "jno", FALSE, NONE, op1(Dl), 0 },
282 /*82*/ { "jb", FALSE, NONE, op1(Dl), 0 },
283 /*83*/ { "jnb", FALSE, NONE, op1(Dl), 0 },
284 /*84*/ { "jz", FALSE, NONE, op1(Dl), 0 },
285 /*85*/ { "jnz", FALSE, NONE, op1(Dl), 0 },
286 /*86*/ { "jbe", FALSE, NONE, op1(Dl), 0 },
287 /*87*/ { "jnbe", FALSE, NONE, op1(Dl), 0 },
289 /*88*/ { "js", FALSE, NONE, op1(Dl), 0 },
290 /*89*/ { "jns", FALSE, NONE, op1(Dl), 0 },
291 /*8a*/ { "jp", FALSE, NONE, op1(Dl), 0 },
292 /*8b*/ { "jnp", FALSE, NONE, op1(Dl), 0 },
293 /*8c*/ { "jl", FALSE, NONE, op1(Dl), 0 },
294 /*8d*/ { "jnl", FALSE, NONE, op1(Dl), 0 },
295 /*8e*/ { "jle", FALSE, NONE, op1(Dl), 0 },
296 /*8f*/ { "jnle", FALSE, NONE, op1(Dl), 0 },
299 static const struct inst db_inst_0f9x[] = {
300 /*90*/ { "seto", TRUE, NONE, op1(Eb), 0 },
301 /*91*/ { "setno", TRUE, NONE, op1(Eb), 0 },
302 /*92*/ { "setb", TRUE, NONE, op1(Eb), 0 },
303 /*93*/ { "setnb", TRUE, NONE, op1(Eb), 0 },
304 /*94*/ { "setz", TRUE, NONE, op1(Eb), 0 },
305 /*95*/ { "setnz", TRUE, NONE, op1(Eb), 0 },
306 /*96*/ { "setbe", TRUE, NONE, op1(Eb), 0 },
307 /*97*/ { "setnbe",TRUE, NONE, op1(Eb), 0 },
309 /*98*/ { "sets", TRUE, NONE, op1(Eb), 0 },
310 /*99*/ { "setns", TRUE, NONE, op1(Eb), 0 },
311 /*9a*/ { "setp", TRUE, NONE, op1(Eb), 0 },
312 /*9b*/ { "setnp", TRUE, NONE, op1(Eb), 0 },
313 /*9c*/ { "setl", TRUE, NONE, op1(Eb), 0 },
314 /*9d*/ { "setnl", TRUE, NONE, op1(Eb), 0 },
315 /*9e*/ { "setle", TRUE, NONE, op1(Eb), 0 },
316 /*9f*/ { "setnle",TRUE, NONE, op1(Eb), 0 },
319 static const struct inst db_inst_0fax[] = {
320 /*a0*/ { "push", FALSE, NONE, op1(Si), 0 },
321 /*a1*/ { "pop", FALSE, NONE, op1(Si), 0 },
322 /*a2*/ { "cpuid", FALSE, NONE, 0, 0 },
323 /*a3*/ { "bt", TRUE, LONG, op2(R,E), 0 },
324 /*a4*/ { "shld", TRUE, LONG, op3(Ib,R,E), 0 },
325 /*a5*/ { "shld", TRUE, LONG, op3(CL,R,E), 0 },
326 /*a6*/ { "", FALSE, NONE, 0, 0 },
327 /*a7*/ { "", FALSE, NONE, 0, 0 },
329 /*a8*/ { "push", FALSE, NONE, op1(Si), 0 },
330 /*a9*/ { "pop", FALSE, NONE, op1(Si), 0 },
331 /*aa*/ { "rsm", FALSE, NONE, 0, 0 },
332 /*ab*/ { "bts", TRUE, LONG, op2(R,E), 0 },
333 /*ac*/ { "shrd", TRUE, LONG, op3(Ib,R,E), 0 },
334 /*ad*/ { "shrd", TRUE, LONG, op3(CL,R,E), 0 },
335 /*ae*/ { "", TRUE, LONG, op1(E), db_Grp15 },
336 /*af*/ { "imul", TRUE, LONG, op2(E,R), 0 },
339 static const struct inst db_inst_0fbx[] = {
340 /*b0*/ { "cmpxchg",TRUE, BYTE, op2(R, E), 0 },
341 /*b0*/ { "cmpxchg",TRUE, LONG, op2(R, E), 0 },
342 /*b2*/ { "lss", TRUE, LONG, op2(E, R), 0 },
343 /*b3*/ { "btr", TRUE, LONG, op2(R, E), 0 },
344 /*b4*/ { "lfs", TRUE, LONG, op2(E, R), 0 },
345 /*b5*/ { "lgs", TRUE, LONG, op2(E, R), 0 },
346 /*b6*/ { "movzb", TRUE, LONG, op2(Eb, R), 0 },
347 /*b7*/ { "movzw", TRUE, LONG, op2(Ew, R), 0 },
349 /*b8*/ { "", FALSE, NONE, 0, 0 },
350 /*b9*/ { "", FALSE, NONE, 0, 0 },
351 /*ba*/ { "", TRUE, LONG, op2(Ib, E), db_Grp8 },
352 /*bb*/ { "btc", TRUE, LONG, op2(R, E), 0 },
353 /*bc*/ { "bsf", TRUE, LONG, op2(E, R), 0 },
354 /*bd*/ { "bsr", TRUE, LONG, op2(E, R), 0 },
355 /*be*/ { "movsb", TRUE, LONG, op2(Eb, R), 0 },
356 /*bf*/ { "movsw", TRUE, LONG, op2(Ew, R), 0 },
359 static const struct inst db_inst_0fcx[] = {
360 /*c0*/ { "xadd", TRUE, BYTE, op2(R, E), 0 },
361 /*c1*/ { "xadd", TRUE, LONG, op2(R, E), 0 },
362 /*c2*/ { "", FALSE, NONE, 0, 0 },
363 /*c3*/ { "", FALSE, NONE, 0, 0 },
364 /*c4*/ { "", FALSE, NONE, 0, 0 },
365 /*c5*/ { "", FALSE, NONE, 0, 0 },
366 /*c6*/ { "", FALSE, NONE, 0, 0 },
367 /*c7*/ { "", TRUE, NONE, op1(E), db_Grp9 },
368 /*c8*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
369 /*c9*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
370 /*ca*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
371 /*cb*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
372 /*cc*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
373 /*cd*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
374 /*ce*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
375 /*cf*/ { "bswap", FALSE, LONG, op1(Ril), 0 },
378 static const struct inst * const db_inst_0f[] = {
397 static const char * const db_Esc92[] = {
398 "fnop", "", "", "", "", "", "", ""
400 static const char * const db_Esc94[] = {
401 "fchs", "fabs", "", "", "ftst", "fxam", "", ""
403 static const char * const db_Esc95[] = {
404 "fld1", "fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz",""
406 static const char * const db_Esc96[] = {
407 "f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp",
410 static const char * const db_Esc97[] = {
411 "fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos"
414 static const char * const db_Esca5[] = {
415 "", "fucompp","", "", "", "", "", ""
418 static const char * const db_Escb4[] = {
419 "fneni","fndisi", "fnclex","fninit","fsetpm", "", "", ""
422 static const char * const db_Esce3[] = {
423 "", "fcompp","", "", "", "", "", ""
426 static const char * const db_Escf4[] = {
427 "fnstsw","", "", "", "", "", "", ""
430 static const struct finst db_Esc8[] = {
431 /*0*/ { "fadd", SNGL, op2(STI,ST), 0 },
432 /*1*/ { "fmul", SNGL, op2(STI,ST), 0 },
433 /*2*/ { "fcom", SNGL, op2(STI,ST), 0 },
434 /*3*/ { "fcomp", SNGL, op2(STI,ST), 0 },
435 /*4*/ { "fsub", SNGL, op2(STI,ST), 0 },
436 /*5*/ { "fsubr", SNGL, op2(STI,ST), 0 },
437 /*6*/ { "fdiv", SNGL, op2(STI,ST), 0 },
438 /*7*/ { "fdivr", SNGL, op2(STI,ST), 0 },
441 static const struct finst db_Esc9[] = {
442 /*0*/ { "fld", SNGL, op1(STI), 0 },
443 /*1*/ { "", NONE, op1(STI), "fxch" },
444 /*2*/ { "fst", SNGL, op1(X), db_Esc92 },
445 /*3*/ { "fstp", SNGL, 0, 0 },
446 /*4*/ { "fldenv", NONE, op1(X), db_Esc94 },
447 /*5*/ { "fldcw", NONE, op1(X), db_Esc95 },
448 /*6*/ { "fnstenv",NONE, op1(X), db_Esc96 },
449 /*7*/ { "fnstcw", NONE, op1(X), db_Esc97 },
452 static const struct finst db_Esca[] = {
453 /*0*/ { "fiadd", LONG, 0, 0 },
454 /*1*/ { "fimul", LONG, 0, 0 },
455 /*2*/ { "ficom", LONG, 0, 0 },
456 /*3*/ { "ficomp", LONG, 0, 0 },
457 /*4*/ { "fisub", LONG, 0, 0 },
458 /*5*/ { "fisubr", LONG, op1(X), db_Esca5 },
459 /*6*/ { "fidiv", LONG, 0, 0 },
460 /*7*/ { "fidivr", LONG, 0, 0 }
463 static const struct finst db_Escb[] = {
464 /*0*/ { "fild", LONG, 0, 0 },
465 /*1*/ { "", NONE, 0, 0 },
466 /*2*/ { "fist", LONG, 0, 0 },
467 /*3*/ { "fistp", LONG, 0, 0 },
468 /*4*/ { "", WORD, op1(X), db_Escb4 },
469 /*5*/ { "fld", EXTR, 0, 0 },
470 /*6*/ { "", WORD, 0, 0 },
471 /*7*/ { "fstp", EXTR, 0, 0 },
474 static const struct finst db_Escc[] = {
475 /*0*/ { "fadd", DBLR, op2(ST,STI), 0 },
476 /*1*/ { "fmul", DBLR, op2(ST,STI), 0 },
477 /*2*/ { "fcom", DBLR, 0, 0 },
478 /*3*/ { "fcomp", DBLR, 0, 0 },
479 /*4*/ { "fsub", DBLR, op2(ST,STI), "fsubr" },
480 /*5*/ { "fsubr", DBLR, op2(ST,STI), "fsub" },
481 /*6*/ { "fdiv", DBLR, op2(ST,STI), "fdivr" },
482 /*7*/ { "fdivr", DBLR, op2(ST,STI), "fdiv" },
485 static const struct finst db_Escd[] = {
486 /*0*/ { "fld", DBLR, op1(STI), "ffree" },
487 /*1*/ { "", NONE, 0, 0 },
488 /*2*/ { "fst", DBLR, op1(STI), 0 },
489 /*3*/ { "fstp", DBLR, op1(STI), 0 },
490 /*4*/ { "frstor", NONE, op1(STI), "fucom" },
491 /*5*/ { "", NONE, op1(STI), "fucomp" },
492 /*6*/ { "fnsave", NONE, 0, 0 },
493 /*7*/ { "fnstsw", NONE, 0, 0 },
496 static const struct finst db_Esce[] = {
497 /*0*/ { "fiadd", WORD, op2(ST,STI), "faddp" },
498 /*1*/ { "fimul", WORD, op2(ST,STI), "fmulp" },
499 /*2*/ { "ficom", WORD, 0, 0 },
500 /*3*/ { "ficomp", WORD, op1(X), db_Esce3 },
501 /*4*/ { "fisub", WORD, op2(ST,STI), "fsubrp" },
502 /*5*/ { "fisubr", WORD, op2(ST,STI), "fsubp" },
503 /*6*/ { "fidiv", WORD, op2(ST,STI), "fdivrp" },
504 /*7*/ { "fidivr", WORD, op2(ST,STI), "fdivp" },
507 static const struct finst db_Escf[] = {
508 /*0*/ { "fild", WORD, 0, 0 },
509 /*1*/ { "", NONE, 0, 0 },
510 /*2*/ { "fist", WORD, 0, 0 },
511 /*3*/ { "fistp", WORD, 0, 0 },
512 /*4*/ { "fbld", NONE, op1(XA), db_Escf4 },
513 /*5*/ { "fild", QUAD, 0, 0 },
514 /*6*/ { "fbstp", NONE, 0, 0 },
515 /*7*/ { "fistp", QUAD, 0, 0 },
518 static const struct finst * const db_Esc_inst[] = {
519 db_Esc8, db_Esc9, db_Esca, db_Escb,
520 db_Escc, db_Escd, db_Esce, db_Escf
523 static const char * const db_Grp1[] = {
534 static const char * const db_Grp2[] = {
545 static const struct inst db_Grp3[] = {
546 { "test", TRUE, NONE, op2(I,E), 0 },
547 { "test", TRUE, NONE, op2(I,E), 0 },
548 { "not", TRUE, NONE, op1(E), 0 },
549 { "neg", TRUE, NONE, op1(E), 0 },
550 { "mul", TRUE, NONE, op2(E,A), 0 },
551 { "imul", TRUE, NONE, op2(E,A), 0 },
552 { "div", TRUE, NONE, op2(E,A), 0 },
553 { "idiv", TRUE, NONE, op2(E,A), 0 },
556 static const struct inst db_Grp4[] = {
557 { "inc", TRUE, BYTE, op1(E), 0 },
558 { "dec", TRUE, BYTE, op1(E), 0 },
559 { "", TRUE, NONE, 0, 0 },
560 { "", TRUE, NONE, 0, 0 },
561 { "", TRUE, NONE, 0, 0 },
562 { "", TRUE, NONE, 0, 0 },
563 { "", TRUE, NONE, 0, 0 },
564 { "", TRUE, NONE, 0, 0 }
567 static const struct inst db_Grp5[] = {
568 { "inc", TRUE, LONG, op1(E), 0 },
569 { "dec", TRUE, LONG, op1(E), 0 },
570 { "call", TRUE, LONG, op1(Eind),0 },
571 { "lcall", TRUE, LONG, op1(Eind),0 },
572 { "jmp", TRUE, LONG, op1(Eind),0 },
573 { "ljmp", TRUE, LONG, op1(Eind),0 },
574 { "push", TRUE, LONG, op1(E), 0 },
575 { "", TRUE, NONE, 0, 0 }
578 static const struct inst db_inst_table[256] = {
579 /*00*/ { "add", TRUE, BYTE, op2(R, E), 0 },
580 /*01*/ { "add", TRUE, LONG, op2(R, E), 0 },
581 /*02*/ { "add", TRUE, BYTE, op2(E, R), 0 },
582 /*03*/ { "add", TRUE, LONG, op2(E, R), 0 },
583 /*04*/ { "add", FALSE, BYTE, op2(I, A), 0 },
584 /*05*/ { "add", FALSE, LONG, op2(Is, A), 0 },
585 /*06*/ { "push", FALSE, NONE, op1(Si), 0 },
586 /*07*/ { "pop", FALSE, NONE, op1(Si), 0 },
588 /*08*/ { "or", TRUE, BYTE, op2(R, E), 0 },
589 /*09*/ { "or", TRUE, LONG, op2(R, E), 0 },
590 /*0a*/ { "or", TRUE, BYTE, op2(E, R), 0 },
591 /*0b*/ { "or", TRUE, LONG, op2(E, R), 0 },
592 /*0c*/ { "or", FALSE, BYTE, op2(I, A), 0 },
593 /*0d*/ { "or", FALSE, LONG, op2(I, A), 0 },
594 /*0e*/ { "push", FALSE, NONE, op1(Si), 0 },
595 /*0f*/ { "", FALSE, NONE, 0, 0 },
597 /*10*/ { "adc", TRUE, BYTE, op2(R, E), 0 },
598 /*11*/ { "adc", TRUE, LONG, op2(R, E), 0 },
599 /*12*/ { "adc", TRUE, BYTE, op2(E, R), 0 },
600 /*13*/ { "adc", TRUE, LONG, op2(E, R), 0 },
601 /*14*/ { "adc", FALSE, BYTE, op2(I, A), 0 },
602 /*15*/ { "adc", FALSE, LONG, op2(Is, A), 0 },
603 /*16*/ { "push", FALSE, NONE, op1(Si), 0 },
604 /*17*/ { "pop", FALSE, NONE, op1(Si), 0 },
606 /*18*/ { "sbb", TRUE, BYTE, op2(R, E), 0 },
607 /*19*/ { "sbb", TRUE, LONG, op2(R, E), 0 },
608 /*1a*/ { "sbb", TRUE, BYTE, op2(E, R), 0 },
609 /*1b*/ { "sbb", TRUE, LONG, op2(E, R), 0 },
610 /*1c*/ { "sbb", FALSE, BYTE, op2(I, A), 0 },
611 /*1d*/ { "sbb", FALSE, LONG, op2(Is, A), 0 },
612 /*1e*/ { "push", FALSE, NONE, op1(Si), 0 },
613 /*1f*/ { "pop", FALSE, NONE, op1(Si), 0 },
615 /*20*/ { "and", TRUE, BYTE, op2(R, E), 0 },
616 /*21*/ { "and", TRUE, LONG, op2(R, E), 0 },
617 /*22*/ { "and", TRUE, BYTE, op2(E, R), 0 },
618 /*23*/ { "and", TRUE, LONG, op2(E, R), 0 },
619 /*24*/ { "and", FALSE, BYTE, op2(I, A), 0 },
620 /*25*/ { "and", FALSE, LONG, op2(I, A), 0 },
621 /*26*/ { "", FALSE, NONE, 0, 0 },
622 /*27*/ { "daa", FALSE, NONE, 0, 0 },
624 /*28*/ { "sub", TRUE, BYTE, op2(R, E), 0 },
625 /*29*/ { "sub", TRUE, LONG, op2(R, E), 0 },
626 /*2a*/ { "sub", TRUE, BYTE, op2(E, R), 0 },
627 /*2b*/ { "sub", TRUE, LONG, op2(E, R), 0 },
628 /*2c*/ { "sub", FALSE, BYTE, op2(I, A), 0 },
629 /*2d*/ { "sub", FALSE, LONG, op2(Is, A), 0 },
630 /*2e*/ { "", FALSE, NONE, 0, 0 },
631 /*2f*/ { "das", FALSE, NONE, 0, 0 },
633 /*30*/ { "xor", TRUE, BYTE, op2(R, E), 0 },
634 /*31*/ { "xor", TRUE, LONG, op2(R, E), 0 },
635 /*32*/ { "xor", TRUE, BYTE, op2(E, R), 0 },
636 /*33*/ { "xor", TRUE, LONG, op2(E, R), 0 },
637 /*34*/ { "xor", FALSE, BYTE, op2(I, A), 0 },
638 /*35*/ { "xor", FALSE, LONG, op2(I, A), 0 },
639 /*36*/ { "", FALSE, NONE, 0, 0 },
640 /*37*/ { "aaa", FALSE, NONE, 0, 0 },
642 /*38*/ { "cmp", TRUE, BYTE, op2(R, E), 0 },
643 /*39*/ { "cmp", TRUE, LONG, op2(R, E), 0 },
644 /*3a*/ { "cmp", TRUE, BYTE, op2(E, R), 0 },
645 /*3b*/ { "cmp", TRUE, LONG, op2(E, R), 0 },
646 /*3c*/ { "cmp", FALSE, BYTE, op2(I, A), 0 },
647 /*3d*/ { "cmp", FALSE, LONG, op2(Is, A), 0 },
648 /*3e*/ { "", FALSE, NONE, 0, 0 },
649 /*3f*/ { "aas", FALSE, NONE, 0, 0 },
651 /*40*/ { "inc", FALSE, LONG, op1(Ri), 0 },
652 /*41*/ { "inc", FALSE, LONG, op1(Ri), 0 },
653 /*42*/ { "inc", FALSE, LONG, op1(Ri), 0 },
654 /*43*/ { "inc", FALSE, LONG, op1(Ri), 0 },
655 /*44*/ { "inc", FALSE, LONG, op1(Ri), 0 },
656 /*45*/ { "inc", FALSE, LONG, op1(Ri), 0 },
657 /*46*/ { "inc", FALSE, LONG, op1(Ri), 0 },
658 /*47*/ { "inc", FALSE, LONG, op1(Ri), 0 },
660 /*48*/ { "dec", FALSE, LONG, op1(Ri), 0 },
661 /*49*/ { "dec", FALSE, LONG, op1(Ri), 0 },
662 /*4a*/ { "dec", FALSE, LONG, op1(Ri), 0 },
663 /*4b*/ { "dec", FALSE, LONG, op1(Ri), 0 },
664 /*4c*/ { "dec", FALSE, LONG, op1(Ri), 0 },
665 /*4d*/ { "dec", FALSE, LONG, op1(Ri), 0 },
666 /*4e*/ { "dec", FALSE, LONG, op1(Ri), 0 },
667 /*4f*/ { "dec", FALSE, LONG, op1(Ri), 0 },
669 /*50*/ { "push", FALSE, LONG, op1(Ri), 0 },
670 /*51*/ { "push", FALSE, LONG, op1(Ri), 0 },
671 /*52*/ { "push", FALSE, LONG, op1(Ri), 0 },
672 /*53*/ { "push", FALSE, LONG, op1(Ri), 0 },
673 /*54*/ { "push", FALSE, LONG, op1(Ri), 0 },
674 /*55*/ { "push", FALSE, LONG, op1(Ri), 0 },
675 /*56*/ { "push", FALSE, LONG, op1(Ri), 0 },
676 /*57*/ { "push", FALSE, LONG, op1(Ri), 0 },
678 /*58*/ { "pop", FALSE, LONG, op1(Ri), 0 },
679 /*59*/ { "pop", FALSE, LONG, op1(Ri), 0 },
680 /*5a*/ { "pop", FALSE, LONG, op1(Ri), 0 },
681 /*5b*/ { "pop", FALSE, LONG, op1(Ri), 0 },
682 /*5c*/ { "pop", FALSE, LONG, op1(Ri), 0 },
683 /*5d*/ { "pop", FALSE, LONG, op1(Ri), 0 },
684 /*5e*/ { "pop", FALSE, LONG, op1(Ri), 0 },
685 /*5f*/ { "pop", FALSE, LONG, op1(Ri), 0 },
687 /*60*/ { "pusha", FALSE, LONG, 0, 0 },
688 /*61*/ { "popa", FALSE, LONG, 0, 0 },
689 /*62*/ { "bound", TRUE, LONG, op2(E, R), 0 },
690 /*63*/ { "arpl", TRUE, NONE, op2(Rw,Ew), 0 },
692 /*64*/ { "", FALSE, NONE, 0, 0 },
693 /*65*/ { "", FALSE, NONE, 0, 0 },
694 /*66*/ { "", FALSE, NONE, 0, 0 },
695 /*67*/ { "", FALSE, NONE, 0, 0 },
697 /*68*/ { "push", FALSE, LONG, op1(I), 0 },
698 /*69*/ { "imul", TRUE, LONG, op3(I,E,R), 0 },
699 /*6a*/ { "push", FALSE, LONG, op1(Ibs), 0 },
700 /*6b*/ { "imul", TRUE, LONG, op3(Ibs,E,R),0 },
701 /*6c*/ { "ins", FALSE, BYTE, op2(DX, DI), 0 },
702 /*6d*/ { "ins", FALSE, LONG, op2(DX, DI), 0 },
703 /*6e*/ { "outs", FALSE, BYTE, op2(SI, DX), 0 },
704 /*6f*/ { "outs", FALSE, LONG, op2(SI, DX), 0 },
706 /*70*/ { "jo", FALSE, NONE, op1(Db), 0 },
707 /*71*/ { "jno", FALSE, NONE, op1(Db), 0 },
708 /*72*/ { "jb", FALSE, NONE, op1(Db), 0 },
709 /*73*/ { "jnb", FALSE, NONE, op1(Db), 0 },
710 /*74*/ { "jz", FALSE, NONE, op1(Db), 0 },
711 /*75*/ { "jnz", FALSE, NONE, op1(Db), 0 },
712 /*76*/ { "jbe", FALSE, NONE, op1(Db), 0 },
713 /*77*/ { "jnbe", FALSE, NONE, op1(Db), 0 },
715 /*78*/ { "js", FALSE, NONE, op1(Db), 0 },
716 /*79*/ { "jns", FALSE, NONE, op1(Db), 0 },
717 /*7a*/ { "jp", FALSE, NONE, op1(Db), 0 },
718 /*7b*/ { "jnp", FALSE, NONE, op1(Db), 0 },
719 /*7c*/ { "jl", FALSE, NONE, op1(Db), 0 },
720 /*7d*/ { "jnl", FALSE, NONE, op1(Db), 0 },
721 /*7e*/ { "jle", FALSE, NONE, op1(Db), 0 },
722 /*7f*/ { "jnle", FALSE, NONE, op1(Db), 0 },
724 /*80*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 },
725 /*81*/ { "", TRUE, LONG, op2(I, E), db_Grp1 },
726 /*82*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 },
727 /*83*/ { "", TRUE, LONG, op2(Ibs,E), db_Grp1 },
728 /*84*/ { "test", TRUE, BYTE, op2(R, E), 0 },
729 /*85*/ { "test", TRUE, LONG, op2(R, E), 0 },
730 /*86*/ { "xchg", TRUE, BYTE, op2(R, E), 0 },
731 /*87*/ { "xchg", TRUE, LONG, op2(R, E), 0 },
733 /*88*/ { "mov", TRUE, BYTE, op2(R, E), 0 },
734 /*89*/ { "mov", TRUE, LONG, op2(R, E), 0 },
735 /*8a*/ { "mov", TRUE, BYTE, op2(E, R), 0 },
736 /*8b*/ { "mov", TRUE, LONG, op2(E, R), 0 },
737 /*8c*/ { "mov", TRUE, NONE, op2(S, Ew), 0 },
738 /*8d*/ { "lea", TRUE, LONG, op2(E, R), 0 },
739 /*8e*/ { "mov", TRUE, NONE, op2(Ew, S), 0 },
740 /*8f*/ { "pop", TRUE, LONG, op1(E), 0 },
742 /*90*/ { "nop", FALSE, NONE, 0, 0 },
743 /*91*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
744 /*92*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
745 /*93*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
746 /*94*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
747 /*95*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
748 /*96*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
749 /*97*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 },
751 /*98*/ { "cbw", FALSE, SDEP, 0, "cwde" }, /* cbw/cwde */
752 /*99*/ { "cwd", FALSE, SDEP, 0, "cdq" }, /* cwd/cdq */
753 /*9a*/ { "lcall", FALSE, NONE, op1(OS), 0 },
754 /*9b*/ { "wait", FALSE, NONE, 0, 0 },
755 /*9c*/ { "pushf", FALSE, LONG, 0, 0 },
756 /*9d*/ { "popf", FALSE, LONG, 0, 0 },
757 /*9e*/ { "sahf", FALSE, NONE, 0, 0 },
758 /*9f*/ { "lahf", FALSE, NONE, 0, 0 },
760 /*a0*/ { "mov", FALSE, BYTE, op2(O, A), 0 },
761 /*a1*/ { "mov", FALSE, LONG, op2(O, A), 0 },
762 /*a2*/ { "mov", FALSE, BYTE, op2(A, O), 0 },
763 /*a3*/ { "mov", FALSE, LONG, op2(A, O), 0 },
764 /*a4*/ { "movs", FALSE, BYTE, op2(SI,DI), 0 },
765 /*a5*/ { "movs", FALSE, LONG, op2(SI,DI), 0 },
766 /*a6*/ { "cmps", FALSE, BYTE, op2(SI,DI), 0 },
767 /*a7*/ { "cmps", FALSE, LONG, op2(SI,DI), 0 },
769 /*a8*/ { "test", FALSE, BYTE, op2(I, A), 0 },
770 /*a9*/ { "test", FALSE, LONG, op2(I, A), 0 },
771 /*aa*/ { "stos", FALSE, BYTE, op1(DI), 0 },
772 /*ab*/ { "stos", FALSE, LONG, op1(DI), 0 },
773 /*ac*/ { "lods", FALSE, BYTE, op1(SI), 0 },
774 /*ad*/ { "lods", FALSE, LONG, op1(SI), 0 },
775 /*ae*/ { "scas", FALSE, BYTE, op1(SI), 0 },
776 /*af*/ { "scas", FALSE, LONG, op1(SI), 0 },
778 /*b0*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
779 /*b1*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
780 /*b2*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
781 /*b3*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
782 /*b4*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
783 /*b5*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
784 /*b6*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
785 /*b7*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 },
787 /*b8*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
788 /*b9*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
789 /*ba*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
790 /*bb*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
791 /*bc*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
792 /*bd*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
793 /*be*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
794 /*bf*/ { "mov", FALSE, LONG, op2(I, Ri), 0 },
796 /*c0*/ { "", TRUE, BYTE, op2(Ib, E), db_Grp2 },
797 /*c1*/ { "", TRUE, LONG, op2(Ib, E), db_Grp2 },
798 /*c2*/ { "ret", FALSE, NONE, op1(Iw), 0 },
799 /*c3*/ { "ret", FALSE, NONE, 0, 0 },
800 /*c4*/ { "les", TRUE, LONG, op2(E, R), 0 },
801 /*c5*/ { "lds", TRUE, LONG, op2(E, R), 0 },
802 /*c6*/ { "mov", TRUE, BYTE, op2(I, E), 0 },
803 /*c7*/ { "mov", TRUE, LONG, op2(I, E), 0 },
805 /*c8*/ { "enter", FALSE, NONE, op2(Iw, Ib), 0 },
806 /*c9*/ { "leave", FALSE, NONE, 0, 0 },
807 /*ca*/ { "lret", FALSE, NONE, op1(Iw), 0 },
808 /*cb*/ { "lret", FALSE, NONE, 0, 0 },
809 /*cc*/ { "int", FALSE, NONE, op1(o3), 0 },
810 /*cd*/ { "int", FALSE, NONE, op1(Ib), 0 },
811 /*ce*/ { "into", FALSE, NONE, 0, 0 },
812 /*cf*/ { "iret", FALSE, NONE, 0, 0 },
814 /*d0*/ { "", TRUE, BYTE, op2(o1, E), db_Grp2 },
815 /*d1*/ { "", TRUE, LONG, op2(o1, E), db_Grp2 },
816 /*d2*/ { "", TRUE, BYTE, op2(CL, E), db_Grp2 },
817 /*d3*/ { "", TRUE, LONG, op2(CL, E), db_Grp2 },
818 /*d4*/ { "aam", FALSE, NONE, op1(Iba), 0 },
819 /*d5*/ { "aad", FALSE, NONE, op1(Iba), 0 },
820 /*d6*/ { ".byte\t0xd6", FALSE, NONE, 0, 0 },
821 /*d7*/ { "xlat", FALSE, BYTE, op1(BX), 0 },
823 /*d8*/ { "", TRUE, NONE, 0, db_Esc8 },
824 /*d9*/ { "", TRUE, NONE, 0, db_Esc9 },
825 /*da*/ { "", TRUE, NONE, 0, db_Esca },
826 /*db*/ { "", TRUE, NONE, 0, db_Escb },
827 /*dc*/ { "", TRUE, NONE, 0, db_Escc },
828 /*dd*/ { "", TRUE, NONE, 0, db_Escd },
829 /*de*/ { "", TRUE, NONE, 0, db_Esce },
830 /*df*/ { "", TRUE, NONE, 0, db_Escf },
832 /*e0*/ { "loopne",FALSE, NONE, op1(Db), 0 },
833 /*e1*/ { "loope", FALSE, NONE, op1(Db), 0 },
834 /*e2*/ { "loop", FALSE, NONE, op1(Db), 0 },
835 /*e3*/ { "jcxz", FALSE, SDEP, op1(Db), "jecxz" },
836 /*e4*/ { "in", FALSE, BYTE, op2(Ib, A), 0 },
837 /*e5*/ { "in", FALSE, LONG, op2(Ib, A) , 0 },
838 /*e6*/ { "out", FALSE, BYTE, op2(A, Ib), 0 },
839 /*e7*/ { "out", FALSE, LONG, op2(A, Ib) , 0 },
841 /*e8*/ { "call", FALSE, NONE, op1(Dl), 0 },
842 /*e9*/ { "jmp", FALSE, NONE, op1(Dl), 0 },
843 /*ea*/ { "ljmp", FALSE, NONE, op1(OS), 0 },
844 /*eb*/ { "jmp", FALSE, NONE, op1(Db), 0 },
845 /*ec*/ { "in", FALSE, BYTE, op2(DX, A), 0 },
846 /*ed*/ { "in", FALSE, LONG, op2(DX, A) , 0 },
847 /*ee*/ { "out", FALSE, BYTE, op2(A, DX), 0 },
848 /*ef*/ { "out", FALSE, LONG, op2(A, DX) , 0 },
850 /*f0*/ { "", FALSE, NONE, 0, 0 },
851 /*f1*/ { ".byte\t0xf1", FALSE, NONE, 0, 0 },
852 /*f2*/ { "", FALSE, NONE, 0, 0 },
853 /*f3*/ { "", FALSE, NONE, 0, 0 },
854 /*f4*/ { "hlt", FALSE, NONE, 0, 0 },
855 /*f5*/ { "cmc", FALSE, NONE, 0, 0 },
856 /*f6*/ { "", TRUE, BYTE, 0, db_Grp3 },
857 /*f7*/ { "", TRUE, LONG, 0, db_Grp3 },
859 /*f8*/ { "clc", FALSE, NONE, 0, 0 },
860 /*f9*/ { "stc", FALSE, NONE, 0, 0 },
861 /*fa*/ { "cli", FALSE, NONE, 0, 0 },
862 /*fb*/ { "sti", FALSE, NONE, 0, 0 },
863 /*fc*/ { "cld", FALSE, NONE, 0, 0 },
864 /*fd*/ { "std", FALSE, NONE, 0, 0 },
865 /*fe*/ { "", TRUE, NONE, 0, db_Grp4 },
866 /*ff*/ { "", TRUE, NONE, 0, db_Grp5 },
869 static const struct inst db_bad_inst =
870 { "???", FALSE, NONE, 0, 0 }
873 #define f_mod(byte) ((byte)>>6)
874 #define f_reg(byte) (((byte)>>3)&0x7)
875 #define f_rm(byte) ((byte)&0x7)
877 #define sib_ss(byte) ((byte)>>6)
878 #define sib_index(byte) (((byte)>>3)&0x7)
879 #define sib_base(byte) ((byte)&0x7)
882 int is_reg; /* if reg, reg number is in 'disp' */
887 bool defss; /* set if %ss is the default segment */
890 static const char * const db_index_reg_16[8] = {
901 static const char * const db_reg[3][8] = {
902 { "%al", "%cl", "%dl", "%bl", "%ah", "%ch", "%dh", "%bh" },
903 { "%ax", "%cx", "%dx", "%bx", "%sp", "%bp", "%si", "%di" },
904 { "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi" }
907 static const char * const db_seg_reg[8] = {
908 "%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", ""
912 * lengths for size attributes
914 static const int db_lengths[] = {
924 #define get_value_inc(result, loc, size, is_signed) \
925 result = db_get_value((loc), (size), (is_signed)); \
929 db_disasm_esc(db_addr_t loc, int inst, int short_addr,
930 int size, const char *seg);
931 static void db_print_address(const char *seg, int size,
932 struct i_addr *addrp);
934 db_read_address(db_addr_t loc, int short_addr, int regmodrm,
935 struct i_addr *addrp);
938 * Read address at location and return updated location.
941 db_read_address(loc, short_addr, regmodrm, addrp)
945 struct i_addr * addrp; /* out */
947 int mod, rm, sib, index, disp;
949 mod = f_mod(regmodrm);
953 addrp->is_reg = TRUE;
957 addrp->is_reg = FALSE;
960 addrp->defss = FALSE;
963 if (rm == 2 || rm == 3 || (rm == 6 && mod != 0))
968 get_value_inc(disp, loc, 2, FALSE);
974 addrp->base = db_index_reg_16[rm];
978 get_value_inc(disp, loc, 1, TRUE);
981 addrp->base = db_index_reg_16[rm];
984 get_value_inc(disp, loc, 2, FALSE);
986 addrp->base = db_index_reg_16[rm];
992 get_value_inc(sib, loc, 1, FALSE);
994 index = sib_index(sib);
996 addrp->index = db_reg[LONG][index];
997 addrp->ss = sib_ss(sib);
1003 get_value_inc(addrp->disp, loc, 4, FALSE);
1008 addrp->base = db_reg[LONG][rm];
1013 get_value_inc(disp, loc, 1, TRUE);
1015 addrp->base = db_reg[LONG][rm];
1019 get_value_inc(disp, loc, 4, FALSE);
1021 addrp->base = db_reg[LONG][rm];
1029 db_print_address(seg, size, addrp)
1032 struct i_addr * addrp;
1034 if (addrp->is_reg) {
1035 db_printf("%s", db_reg[size][addrp->disp]);
1040 db_printf("%s:", seg);
1042 else if (addrp->defss) {
1046 db_printsym((db_addr_t)addrp->disp, DB_STGY_ANY);
1047 if (addrp->base != NULL || addrp->index != NULL) {
1050 db_printf("%s", addrp->base);
1052 db_printf(",%s,%d", addrp->index, 1<<addrp->ss);
1058 * Disassemble floating-point ("escape") instruction
1059 * and return updated location.
1062 db_disasm_esc(loc, inst, short_addr, size, seg)
1070 const struct finst * fp;
1072 struct i_addr address;
1075 get_value_inc(regmodrm, loc, 1, FALSE);
1076 fp = &db_Esc_inst[inst - 0xd8][f_reg(regmodrm)];
1077 mod = f_mod(regmodrm);
1079 if (*fp->f_name == '\0') {
1080 db_printf("<bad instruction>");
1084 * Normal address modes.
1086 loc = db_read_address(loc, short_addr, regmodrm, &address);
1087 db_printf("%s", fp->f_name);
1088 switch(fp->f_size) {
1111 db_print_address(seg, BYTE, &address);
1115 * 'reg-reg' - special formats
1117 switch (fp->f_rrmode) {
1119 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1120 db_printf("%s\t%%st,%%st(%d)",name,f_rm(regmodrm));
1123 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1124 db_printf("%s\t%%st(%d),%%st",name, f_rm(regmodrm));
1127 name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
1128 db_printf("%s\t%%st(%d)",name, f_rm(regmodrm));
1131 name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)];
1134 db_printf("%s", name);
1137 name = ((const char * const *)fp->f_rrname)[f_rm(regmodrm)];
1140 db_printf("%s\t%%ax", name);
1144 db_printf("<bad instruction>");
1153 * Disassemble instruction at 'loc'. 'altfmt' specifies an
1154 * (optional) alternate format. Return address of start of
1158 db_disasm(db_addr_t loc, bool altfmt)
1164 const struct inst * ip;
1165 const char * i_name;
1176 struct i_addr address;
1178 if (db_segsize(kdb_frame) == 16)
1180 get_value_inc(inst, loc, 1, FALSE);
1199 size = (altfmt ? LONG : WORD);
1202 short_addr = !altfmt;
1226 db_printf("repne ");
1236 get_value_inc(inst, loc, 1, FALSE);
1240 db_printf("pause\n");
1243 db_printf("repe "); /* XXX repe VS rep */
1248 if (inst >= 0xd8 && inst <= 0xdf) {
1249 loc = db_disasm_esc(loc, inst, short_addr, size, seg);
1255 get_value_inc(inst, loc, 1, FALSE);
1256 ip = db_inst_0f[inst>>4];
1265 ip = &db_inst_table[inst];
1267 if (ip->i_has_modrm) {
1268 get_value_inc(regmodrm, loc, 1, FALSE);
1269 loc = db_read_address(loc, short_addr, regmodrm, &address);
1272 i_name = ip->i_name;
1273 i_size = ip->i_size;
1274 i_mode = ip->i_mode;
1276 if (ip->i_extra == db_Grp1 || ip->i_extra == db_Grp2 ||
1277 ip->i_extra == db_Grp6 || ip->i_extra == db_Grp7 ||
1278 ip->i_extra == db_Grp8 || ip->i_extra == db_Grp9 ||
1279 ip->i_extra == db_Grp15) {
1280 i_name = ((const char * const *)ip->i_extra)[f_reg(regmodrm)];
1282 else if (ip->i_extra == db_Grp3) {
1284 ip = &ip[f_reg(regmodrm)];
1285 i_name = ip->i_name;
1286 i_mode = ip->i_mode;
1288 else if (ip->i_extra == db_Grp4 || ip->i_extra == db_Grp5) {
1290 ip = &ip[f_reg(regmodrm)];
1291 i_name = ip->i_name;
1292 i_mode = ip->i_mode;
1293 i_size = ip->i_size;
1296 /* Special cases that don't fit well in the tables. */
1297 if (ip->i_extra == db_Grp7 && f_mod(regmodrm) == 3) {
1311 if (ip->i_extra == db_Grp15 && f_mod(regmodrm) == 3) {
1312 i_name = db_Grp15b[f_reg(regmodrm)];
1317 if (i_size == SDEP) {
1319 db_printf("%s", i_name);
1321 db_printf("%s", (const char *)ip->i_extra);
1324 db_printf("%s", i_name);
1325 if (i_size != NONE) {
1326 if (i_size == BYTE) {
1330 else if (i_size == WORD) {
1334 else if (size == WORD)
1343 i_mode >>= 8, first = false)
1348 switch (i_mode & 0xFF) {
1351 db_print_address(seg, size, &address);
1356 db_print_address(seg, size, &address);
1360 db_print_address(seg, LONG, &address);
1364 db_print_address(seg, WORD, &address);
1368 db_print_address(seg, BYTE, &address);
1372 db_printf("%s", db_reg[size][f_reg(regmodrm)]);
1376 db_printf("%s", db_reg[WORD][f_reg(regmodrm)]);
1380 db_printf("%s", db_reg[size][f_rm(inst)]);
1384 db_printf("%s", db_reg[LONG][f_rm(inst)]);
1388 db_printf("%s", db_seg_reg[f_reg(regmodrm)]);
1392 db_printf("%s", db_seg_reg[f_reg(inst)]);
1396 db_printf("%s", db_reg[size][0]); /* acc */
1401 db_printf("%s:", seg);
1402 db_printf("(%s)", short_addr ? "%bx" : "%ebx");
1415 db_printf("%s:", seg);
1416 db_printf("(%s)", short_addr ? "%si" : "%esi");
1420 db_printf("%%es:(%s)", short_addr ? "%di" : "%edi");
1424 db_printf("%%cr%d", f_reg(regmodrm));
1428 db_printf("%%dr%d", f_reg(regmodrm));
1432 db_printf("%%tr%d", f_reg(regmodrm));
1436 len = db_lengths[size];
1437 get_value_inc(imm, loc, len, FALSE);
1438 db_printf("$%#r", imm);
1442 len = db_lengths[size];
1443 get_value_inc(imm, loc, len, FALSE);
1444 db_printf("$%+#r", imm);
1448 get_value_inc(imm, loc, 1, FALSE);
1449 db_printf("$%#r", imm);
1453 get_value_inc(imm, loc, 1, FALSE);
1455 db_printf("$%#r", imm);
1459 get_value_inc(imm, loc, 1, TRUE);
1462 db_printf("$%+#r", imm);
1466 get_value_inc(imm, loc, 2, FALSE);
1467 db_printf("$%#r", imm);
1471 len = (short_addr ? 2 : 4);
1472 get_value_inc(displ, loc, len, FALSE);
1474 db_printf("%s:%+#r",seg, displ);
1476 db_printsym((db_addr_t)displ, DB_STGY_ANY);
1480 get_value_inc(displ, loc, 1, TRUE);
1484 db_printsym((db_addr_t)displ, DB_STGY_XTRN);
1488 len = db_lengths[size];
1489 get_value_inc(displ, loc, len, FALSE);
1493 db_printsym((db_addr_t)displ, DB_STGY_XTRN);
1505 len = db_lengths[size];
1506 get_value_inc(imm, loc, len, FALSE); /* offset */
1507 get_value_inc(imm2, loc, 2, FALSE); /* segment */
1508 db_printf("$%#r,%#r", imm2, imm);