The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/amd64/amd64/db_disasm.c

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    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 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/6.3/sys/amd64/amd64/db_disasm.c 173886 2007-11-24 19:45:58Z cvs2svn $");
   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  * REX prefix and bits
   54  */
   55 #define REX_B   1
   56 #define REX_X   2
   57 #define REX_R   4
   58 #define REX_W   8
   59 #define REX     0x40
   60 
   61 /*
   62  * Addressing modes
   63  */
   64 #define E       1                       /* general effective address */
   65 #define Eind    2                       /* indirect address (jump, call) */
   66 #define Ew      3                       /* address, word size */
   67 #define Eb      4                       /* address, byte size */
   68 #define R       5                       /* register, in 'reg' field */
   69 #define Rw      6                       /* word register, in 'reg' field */
   70 #define Ri      7                       /* register in instruction */
   71 #define S       8                       /* segment reg, in 'reg' field */
   72 #define Si      9                       /* segment reg, in instruction */
   73 #define A       10                      /* accumulator */
   74 #define BX      11                      /* (bx) */
   75 #define CL      12                      /* cl, for shifts */
   76 #define DX      13                      /* dx, for IO */
   77 #define SI      14                      /* si */
   78 #define DI      15                      /* di */
   79 #define CR      16                      /* control register */
   80 #define DR      17                      /* debug register */
   81 #define TR      18                      /* test register */
   82 #define I       19                      /* immediate, unsigned */
   83 #define Is      20                      /* immediate, signed */
   84 #define Ib      21                      /* byte immediate, unsigned */
   85 #define Ibs     22                      /* byte immediate, signed */
   86 #define Iw      23                      /* word immediate, unsigned */
   87 #define Ilq     24                      /* long/quad immediate, unsigned */
   88 #define O       25                      /* direct address */
   89 #define Db      26                      /* byte displacement from EIP */
   90 #define Dl      27                      /* long displacement from EIP */
   91 #define o1      28                      /* constant 1 */
   92 #define o3      29                      /* constant 3 */
   93 #define OS      30                      /* immediate offset/segment */
   94 #define ST      31                      /* FP stack top */
   95 #define STI     32                      /* FP stack */
   96 #define X       33                      /* extended FP op */
   97 #define XA      34                      /* for 'fstcw %ax' */
   98 #define El      35                      /* address, long/quad size */
   99 #define Ril     36                      /* long register in instruction */
  100 #define Iba     37                      /* byte immediate, don't print if 0xa */
  101 #define EL      38                      /* address, explicitly long size */
  102 
  103 struct inst {
  104         const char *    i_name;         /* name */
  105         short   i_has_modrm;            /* has regmodrm byte */
  106         short   i_size;                 /* operand size */
  107         int     i_mode;                 /* addressing modes */
  108         const void *    i_extra;        /* pointer to extra opcode table */
  109 };
  110 
  111 #define op1(x)          (x)
  112 #define op2(x,y)        ((x)|((y)<<8))
  113 #define op3(x,y,z)      ((x)|((y)<<8)|((z)<<16))
  114 
  115 struct finst {
  116         const char *    f_name;         /* name for memory instruction */
  117         int     f_size;                 /* size for memory instruction */
  118         int     f_rrmode;               /* mode for rr instruction */
  119         const void *    f_rrname;       /* name for rr instruction
  120                                            (or pointer to table) */
  121 };
  122 
  123 static const char * const db_Grp6[] = {
  124         "sldt",
  125         "str",
  126         "lldt",
  127         "ltr",
  128         "verr",
  129         "verw",
  130         "",
  131         ""
  132 };
  133 
  134 static const char * const db_Grp7[] = {
  135         "sgdt",
  136         "sidt",
  137         "lgdt",
  138         "lidt",
  139         "smsw",
  140         "",
  141         "lmsw",
  142         "invlpg"
  143 };
  144 
  145 static const char * const db_Grp8[] = {
  146         "",
  147         "",
  148         "",
  149         "",
  150         "bt",
  151         "bts",
  152         "btr",
  153         "btc"
  154 };
  155 
  156 static const char * const db_Grp9[] = {
  157         "",
  158         "cmpxchg8b",
  159         "",
  160         "",
  161         "",
  162         "",
  163         "",
  164         ""
  165 };
  166 
  167 static const struct inst db_inst_0f0x[] = {
  168 /*00*/  { "",      TRUE,  NONE,  op1(Ew),     db_Grp6 },
  169 /*01*/  { "",      TRUE,  NONE,  op1(Ew),     db_Grp7 },
  170 /*02*/  { "lar",   TRUE,  LONG,  op2(E,R),    0 },
  171 /*03*/  { "lsl",   TRUE,  LONG,  op2(E,R),    0 },
  172 /*04*/  { "",      FALSE, NONE,  0,           0 },
  173 /*05*/  { "",      FALSE, NONE,  0,           0 },
  174 /*06*/  { "clts",  FALSE, NONE,  0,           0 },
  175 /*07*/  { "",      FALSE, NONE,  0,           0 },
  176 
  177 /*08*/  { "invd",  FALSE, NONE,  0,           0 },
  178 /*09*/  { "wbinvd",FALSE, NONE,  0,           0 },
  179 /*0a*/  { "",      FALSE, NONE,  0,           0 },
  180 /*0b*/  { "",      FALSE, NONE,  0,           0 },
  181 /*0c*/  { "",      FALSE, NONE,  0,           0 },
  182 /*0d*/  { "",      FALSE, NONE,  0,           0 },
  183 /*0e*/  { "",      FALSE, NONE,  0,           0 },
  184 /*0f*/  { "",      FALSE, NONE,  0,           0 },
  185 };
  186 
  187 static const struct inst db_inst_0f2x[] = {
  188 /*20*/  { "mov",   TRUE,  LONG,  op2(CR,El),  0 },
  189 /*21*/  { "mov",   TRUE,  LONG,  op2(DR,El),  0 },
  190 /*22*/  { "mov",   TRUE,  LONG,  op2(El,CR),  0 },
  191 /*23*/  { "mov",   TRUE,  LONG,  op2(El,DR),  0 },
  192 /*24*/  { "mov",   TRUE,  LONG,  op2(TR,El),  0 },
  193 /*25*/  { "",      FALSE, NONE,  0,           0 },
  194 /*26*/  { "mov",   TRUE,  LONG,  op2(El,TR),  0 },
  195 /*27*/  { "",      FALSE, NONE,  0,           0 },
  196 
  197 /*28*/  { "",      FALSE, NONE,  0,           0 },
  198 /*29*/  { "",      FALSE, NONE,  0,           0 },
  199 /*2a*/  { "",      FALSE, NONE,  0,           0 },
  200 /*2b*/  { "",      FALSE, NONE,  0,           0 },
  201 /*2c*/  { "",      FALSE, NONE,  0,           0 },
  202 /*2d*/  { "",      FALSE, NONE,  0,           0 },
  203 /*2e*/  { "",      FALSE, NONE,  0,           0 },
  204 /*2f*/  { "",      FALSE, NONE,  0,           0 },
  205 };
  206 
  207 static const struct inst db_inst_0f3x[] = {
  208 /*30*/  { "wrmsr", FALSE, NONE,  0,           0 },
  209 /*31*/  { "rdtsc", FALSE, NONE,  0,           0 },
  210 /*32*/  { "rdmsr", FALSE, NONE,  0,           0 },
  211 /*33*/  { "rdpmc", FALSE, NONE,  0,           0 },
  212 /*34*/  { "",      FALSE, NONE,  0,           0 },
  213 /*35*/  { "",      FALSE, NONE,  0,           0 },
  214 /*36*/  { "",      FALSE, NONE,  0,           0 },
  215 /*37*/  { "",      FALSE, NONE,  0,           0 },
  216 
  217 /*38*/  { "",      FALSE, NONE,  0,           0 },
  218 /*39*/  { "",      FALSE, NONE,  0,           0 },
  219 /*3a*/  { "",      FALSE, NONE,  0,           0 },
  220 /*3b*/  { "",      FALSE, NONE,  0,           0 },
  221 /*3c*/  { "",      FALSE, NONE,  0,           0 },
  222 /*3d*/  { "",      FALSE, NONE,  0,           0 },
  223 /*3e*/  { "",      FALSE, NONE,  0,           0 },
  224 /*3f*/  { "",      FALSE, NONE,  0,           0 },
  225 };
  226 
  227 static const struct inst db_inst_0f4x[] = {
  228 /*40*/  { "cmovo",  TRUE, NONE,  op2(E, R),   0 },
  229 /*41*/  { "cmovno", TRUE, NONE,  op2(E, R),   0 },
  230 /*42*/  { "cmovb",  TRUE, NONE,  op2(E, R),   0 },
  231 /*43*/  { "cmovnb", TRUE, NONE,  op2(E, R),   0 },
  232 /*44*/  { "cmovz",  TRUE, NONE,  op2(E, R),   0 },
  233 /*45*/  { "cmovnz", TRUE, NONE,  op2(E, R),   0 },
  234 /*46*/  { "cmovbe", TRUE, NONE,  op2(E, R),   0 },
  235 /*47*/  { "cmovnbe",TRUE, NONE,  op2(E, R),   0 },
  236 
  237 /*48*/  { "cmovs",  TRUE, NONE,  op2(E, R),   0 },
  238 /*49*/  { "cmovns", TRUE, NONE,  op2(E, R),   0 },
  239 /*4a*/  { "cmovp",  TRUE, NONE,  op2(E, R),   0 },
  240 /*4b*/  { "cmovnp", TRUE, NONE,  op2(E, R),   0 },
  241 /*4c*/  { "cmovl",  TRUE, NONE,  op2(E, R),   0 },
  242 /*4d*/  { "cmovnl", TRUE, NONE,  op2(E, R),   0 },
  243 /*4e*/  { "cmovle", TRUE, NONE,  op2(E, R),   0 },
  244 /*4f*/  { "cmovnle",TRUE, NONE,  op2(E, R),   0 },
  245 };
  246 
  247 static const struct inst db_inst_0f8x[] = {
  248 /*80*/  { "jo",    FALSE, NONE,  op1(Dl),     0 },
  249 /*81*/  { "jno",   FALSE, NONE,  op1(Dl),     0 },
  250 /*82*/  { "jb",    FALSE, NONE,  op1(Dl),     0 },
  251 /*83*/  { "jnb",   FALSE, NONE,  op1(Dl),     0 },
  252 /*84*/  { "jz",    FALSE, NONE,  op1(Dl),     0 },
  253 /*85*/  { "jnz",   FALSE, NONE,  op1(Dl),     0 },
  254 /*86*/  { "jbe",   FALSE, NONE,  op1(Dl),     0 },
  255 /*87*/  { "jnbe",  FALSE, NONE,  op1(Dl),     0 },
  256 
  257 /*88*/  { "js",    FALSE, NONE,  op1(Dl),     0 },
  258 /*89*/  { "jns",   FALSE, NONE,  op1(Dl),     0 },
  259 /*8a*/  { "jp",    FALSE, NONE,  op1(Dl),     0 },
  260 /*8b*/  { "jnp",   FALSE, NONE,  op1(Dl),     0 },
  261 /*8c*/  { "jl",    FALSE, NONE,  op1(Dl),     0 },
  262 /*8d*/  { "jnl",   FALSE, NONE,  op1(Dl),     0 },
  263 /*8e*/  { "jle",   FALSE, NONE,  op1(Dl),     0 },
  264 /*8f*/  { "jnle",  FALSE, NONE,  op1(Dl),     0 },
  265 };
  266 
  267 static const struct inst db_inst_0f9x[] = {
  268 /*90*/  { "seto",  TRUE,  NONE,  op1(Eb),     0 },
  269 /*91*/  { "setno", TRUE,  NONE,  op1(Eb),     0 },
  270 /*92*/  { "setb",  TRUE,  NONE,  op1(Eb),     0 },
  271 /*93*/  { "setnb", TRUE,  NONE,  op1(Eb),     0 },
  272 /*94*/  { "setz",  TRUE,  NONE,  op1(Eb),     0 },
  273 /*95*/  { "setnz", TRUE,  NONE,  op1(Eb),     0 },
  274 /*96*/  { "setbe", TRUE,  NONE,  op1(Eb),     0 },
  275 /*97*/  { "setnbe",TRUE,  NONE,  op1(Eb),     0 },
  276 
  277 /*98*/  { "sets",  TRUE,  NONE,  op1(Eb),     0 },
  278 /*99*/  { "setns", TRUE,  NONE,  op1(Eb),     0 },
  279 /*9a*/  { "setp",  TRUE,  NONE,  op1(Eb),     0 },
  280 /*9b*/  { "setnp", TRUE,  NONE,  op1(Eb),     0 },
  281 /*9c*/  { "setl",  TRUE,  NONE,  op1(Eb),     0 },
  282 /*9d*/  { "setnl", TRUE,  NONE,  op1(Eb),     0 },
  283 /*9e*/  { "setle", TRUE,  NONE,  op1(Eb),     0 },
  284 /*9f*/  { "setnle",TRUE,  NONE,  op1(Eb),     0 },
  285 };
  286 
  287 static const struct inst db_inst_0fax[] = {
  288 /*a0*/  { "push",  FALSE, NONE,  op1(Si),     0 },
  289 /*a1*/  { "pop",   FALSE, NONE,  op1(Si),     0 },
  290 /*a2*/  { "cpuid", FALSE, NONE,  0,           0 },
  291 /*a3*/  { "bt",    TRUE,  LONG,  op2(R,E),    0 },
  292 /*a4*/  { "shld",  TRUE,  LONG,  op3(Ib,R,E), 0 },
  293 /*a5*/  { "shld",  TRUE,  LONG,  op3(CL,R,E), 0 },
  294 /*a6*/  { "",      FALSE, NONE,  0,           0 },
  295 /*a7*/  { "",      FALSE, NONE,  0,           0 },
  296 
  297 /*a8*/  { "push",  FALSE, NONE,  op1(Si),     0 },
  298 /*a9*/  { "pop",   FALSE, NONE,  op1(Si),     0 },
  299 /*aa*/  { "rsm",   FALSE, NONE,  0,           0 },
  300 /*ab*/  { "bts",   TRUE,  LONG,  op2(R,E),    0 },
  301 /*ac*/  { "shrd",  TRUE,  LONG,  op3(Ib,R,E), 0 },
  302 /*ad*/  { "shrd",  TRUE,  LONG,  op3(CL,R,E), 0 },
  303 /*a6*/  { "",      FALSE, NONE,  0,           0 },
  304 /*a7*/  { "imul",  TRUE,  LONG,  op2(E,R),    0 },
  305 };
  306 
  307 static const struct inst db_inst_0fbx[] = {
  308 /*b0*/  { "cmpxchg",TRUE, BYTE,  op2(R, E),   0 },
  309 /*b0*/  { "cmpxchg",TRUE, LONG,  op2(R, E),   0 },
  310 /*b2*/  { "lss",   TRUE,  LONG,  op2(E, R),   0 },
  311 /*b3*/  { "btr",   TRUE,  LONG,  op2(R, E),   0 },
  312 /*b4*/  { "lfs",   TRUE,  LONG,  op2(E, R),   0 },
  313 /*b5*/  { "lgs",   TRUE,  LONG,  op2(E, R),   0 },
  314 /*b6*/  { "movzb", TRUE,  LONG,  op2(Eb, R),  0 },
  315 /*b7*/  { "movzw", TRUE,  LONG,  op2(Ew, R),  0 },
  316 
  317 /*b8*/  { "",      FALSE, NONE,  0,           0 },
  318 /*b9*/  { "",      FALSE, NONE,  0,           0 },
  319 /*ba*/  { "",      TRUE,  LONG,  op2(Ib, E),  db_Grp8 },
  320 /*bb*/  { "btc",   TRUE,  LONG,  op2(R, E),   0 },
  321 /*bc*/  { "bsf",   TRUE,  LONG,  op2(E, R),   0 },
  322 /*bd*/  { "bsr",   TRUE,  LONG,  op2(E, R),   0 },
  323 /*be*/  { "movsb", TRUE,  LONG,  op2(Eb, R),  0 },
  324 /*bf*/  { "movsw", TRUE,  LONG,  op2(Ew, R),  0 },
  325 };
  326 
  327 static const struct inst db_inst_0fcx[] = {
  328 /*c0*/  { "xadd",  TRUE,  BYTE,  op2(R, E),   0 },
  329 /*c1*/  { "xadd",  TRUE,  LONG,  op2(R, E),   0 },
  330 /*c2*/  { "",      FALSE, NONE,  0,           0 },
  331 /*c3*/  { "",      FALSE, NONE,  0,           0 },
  332 /*c4*/  { "",      FALSE, NONE,  0,           0 },
  333 /*c5*/  { "",      FALSE, NONE,  0,           0 },
  334 /*c6*/  { "",      FALSE, NONE,  0,           0 },
  335 /*c7*/  { "",      TRUE,  NONE,  op1(E),      db_Grp9 },
  336 /*c8*/  { "bswap", FALSE, LONG,  op1(Ril),    0 },
  337 /*c9*/  { "bswap", FALSE, LONG,  op1(Ril),    0 },
  338 /*ca*/  { "bswap", FALSE, LONG,  op1(Ril),    0 },
  339 /*cb*/  { "bswap", FALSE, LONG,  op1(Ril),    0 },
  340 /*cc*/  { "bswap", FALSE, LONG,  op1(Ril),    0 },
  341 /*cd*/  { "bswap", FALSE, LONG,  op1(Ril),    0 },
  342 /*ce*/  { "bswap", FALSE, LONG,  op1(Ril),    0 },
  343 /*cf*/  { "bswap", FALSE, LONG,  op1(Ril),    0 },
  344 };
  345 
  346 static const struct inst * const db_inst_0f[] = {
  347         db_inst_0f0x,
  348         0,
  349         db_inst_0f2x,
  350         db_inst_0f3x,
  351         db_inst_0f4x,
  352         0,
  353         0,
  354         0,
  355         db_inst_0f8x,
  356         db_inst_0f9x,
  357         db_inst_0fax,
  358         db_inst_0fbx,
  359         db_inst_0fcx,
  360         0,
  361         0,
  362         0
  363 };
  364 
  365 static const char * const db_Esc92[] = {
  366         "fnop", "",     "",     "",     "",     "",     "",     ""
  367 };
  368 static const char * const db_Esc94[] = {
  369         "fchs", "fabs", "",     "",     "ftst", "fxam", "",     ""
  370 };
  371 static const char * const db_Esc95[] = {
  372         "fld1", "fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz",""
  373 };
  374 static const char * const db_Esc96[] = {
  375         "f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp",
  376         "fincstp"
  377 };
  378 static const char * const db_Esc97[] = {
  379         "fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos"
  380 };
  381 
  382 static const char * const db_Esca5[] = {
  383         "",     "fucompp","",   "",     "",     "",     "",     ""
  384 };
  385 
  386 static const char * const db_Escb4[] = {
  387         "fneni","fndisi",       "fnclex","fninit","fsetpm",     "",     "",     ""
  388 };
  389 
  390 static const char * const db_Esce3[] = {
  391         "",     "fcompp","",    "",     "",     "",     "",     ""
  392 };
  393 
  394 static const char * const db_Escf4[] = {
  395         "fnstsw","",    "",     "",     "",     "",     "",     ""
  396 };
  397 
  398 static const struct finst db_Esc8[] = {
  399 /**/   { "fadd",   SNGL,  op2(STI,ST), 0 },
  400 /*1*/   { "fmul",   SNGL,  op2(STI,ST), 0 },
  401 /*2*/   { "fcom",   SNGL,  op2(STI,ST), 0 },
  402 /*3*/   { "fcomp",  SNGL,  op2(STI,ST), 0 },
  403 /*4*/   { "fsub",   SNGL,  op2(STI,ST), 0 },
  404 /*5*/   { "fsubr",  SNGL,  op2(STI,ST), 0 },
  405 /*6*/   { "fdiv",   SNGL,  op2(STI,ST), 0 },
  406 /*7*/   { "fdivr",  SNGL,  op2(STI,ST), 0 },
  407 };
  408 
  409 static const struct finst db_Esc9[] = {
  410 /**/   { "fld",    SNGL,  op1(STI),    0 },
  411 /*1*/   { "",       NONE,  op1(STI),    "fxch" },
  412 /*2*/   { "fst",    SNGL,  op1(X),      db_Esc92 },
  413 /*3*/   { "fstp",   SNGL,  0,           0 },
  414 /*4*/   { "fldenv", NONE,  op1(X),      db_Esc94 },
  415 /*5*/   { "fldcw",  NONE,  op1(X),      db_Esc95 },
  416 /*6*/   { "fnstenv",NONE,  op1(X),      db_Esc96 },
  417 /*7*/   { "fnstcw", NONE,  op1(X),      db_Esc97 },
  418 };
  419 
  420 static const struct finst db_Esca[] = {
  421 /**/   { "fiadd",  LONG,  0,           0 },
  422 /*1*/   { "fimul",  LONG,  0,           0 },
  423 /*2*/   { "ficom",  LONG,  0,           0 },
  424 /*3*/   { "ficomp", LONG,  0,           0 },
  425 /*4*/   { "fisub",  LONG,  0,           0 },
  426 /*5*/   { "fisubr", LONG,  op1(X),      db_Esca5 },
  427 /*6*/   { "fidiv",  LONG,  0,           0 },
  428 /*7*/   { "fidivr", LONG,  0,           0 }
  429 };
  430 
  431 static const struct finst db_Escb[] = {
  432 /**/   { "fild",   LONG,  0,           0 },
  433 /*1*/   { "",       NONE,  0,           0 },
  434 /*2*/   { "fist",   LONG,  0,           0 },
  435 /*3*/   { "fistp",  LONG,  0,           0 },
  436 /*4*/   { "",       WORD,  op1(X),      db_Escb4 },
  437 /*5*/   { "fld",    EXTR,  0,           0 },
  438 /*6*/   { "",       WORD,  0,           0 },
  439 /*7*/   { "fstp",   EXTR,  0,           0 },
  440 };
  441 
  442 static const struct finst db_Escc[] = {
  443 /**/   { "fadd",   DBLR,  op2(ST,STI), 0 },
  444 /*1*/   { "fmul",   DBLR,  op2(ST,STI), 0 },
  445 /*2*/   { "fcom",   DBLR,  0,           0 },
  446 /*3*/   { "fcomp",  DBLR,  0,           0 },
  447 /*4*/   { "fsub",   DBLR,  op2(ST,STI), "fsubr" },
  448 /*5*/   { "fsubr",  DBLR,  op2(ST,STI), "fsub" },
  449 /*6*/   { "fdiv",   DBLR,  op2(ST,STI), "fdivr" },
  450 /*7*/   { "fdivr",  DBLR,  op2(ST,STI), "fdiv" },
  451 };
  452 
  453 static const struct finst db_Escd[] = {
  454 /**/   { "fld",    DBLR,  op1(STI),    "ffree" },
  455 /*1*/   { "",       NONE,  0,           0 },
  456 /*2*/   { "fst",    DBLR,  op1(STI),    0 },
  457 /*3*/   { "fstp",   DBLR,  op1(STI),    0 },
  458 /*4*/   { "frstor", NONE,  op1(STI),    "fucom" },
  459 /*5*/   { "",       NONE,  op1(STI),    "fucomp" },
  460 /*6*/   { "fnsave", NONE,  0,           0 },
  461 /*7*/   { "fnstsw", NONE,  0,           0 },
  462 };
  463 
  464 static const struct finst db_Esce[] = {
  465 /**/   { "fiadd",  WORD,  op2(ST,STI), "faddp" },
  466 /*1*/   { "fimul",  WORD,  op2(ST,STI), "fmulp" },
  467 /*2*/   { "ficom",  WORD,  0,           0 },
  468 /*3*/   { "ficomp", WORD,  op1(X),      db_Esce3 },
  469 /*4*/   { "fisub",  WORD,  op2(ST,STI), "fsubrp" },
  470 /*5*/   { "fisubr", WORD,  op2(ST,STI), "fsubp" },
  471 /*6*/   { "fidiv",  WORD,  op2(ST,STI), "fdivrp" },
  472 /*7*/   { "fidivr", WORD,  op2(ST,STI), "fdivp" },
  473 };
  474 
  475 static const struct finst db_Escf[] = {
  476 /**/   { "fild",   WORD,  0,           0 },
  477 /*1*/   { "",       NONE,  0,           0 },
  478 /*2*/   { "fist",   WORD,  0,           0 },
  479 /*3*/   { "fistp",  WORD,  0,           0 },
  480 /*4*/   { "fbld",   NONE,  op1(XA),     db_Escf4 },
  481 /*5*/   { "fild",   QUAD,  0,           0 },
  482 /*6*/   { "fbstp",  NONE,  0,           0 },
  483 /*7*/   { "fistp",  QUAD,  0,           0 },
  484 };
  485 
  486 static const struct finst * const db_Esc_inst[] = {
  487         db_Esc8, db_Esc9, db_Esca, db_Escb,
  488         db_Escc, db_Escd, db_Esce, db_Escf
  489 };
  490 
  491 static const char * const db_Grp1[] = {
  492         "add",
  493         "or",
  494         "adc",
  495         "sbb",
  496         "and",
  497         "sub",
  498         "xor",
  499         "cmp"
  500 };
  501 
  502 static const char * const db_Grp2[] = {
  503         "rol",
  504         "ror",
  505         "rcl",
  506         "rcr",
  507         "shl",
  508         "shr",
  509         "shl",
  510         "sar"
  511 };
  512 
  513 static const struct inst db_Grp3[] = {
  514         { "test",  TRUE, NONE, op2(I,E), 0 },
  515         { "test",  TRUE, NONE, op2(I,E), 0 },
  516         { "not",   TRUE, NONE, op1(E),   0 },
  517         { "neg",   TRUE, NONE, op1(E),   0 },
  518         { "mul",   TRUE, NONE, op2(E,A), 0 },
  519         { "imul",  TRUE, NONE, op2(E,A), 0 },
  520         { "div",   TRUE, NONE, op2(E,A), 0 },
  521         { "idiv",  TRUE, NONE, op2(E,A), 0 },
  522 };
  523 
  524 static const struct inst db_Grp4[] = {
  525         { "inc",   TRUE, BYTE, op1(E),   0 },
  526         { "dec",   TRUE, BYTE, op1(E),   0 },
  527         { "",      TRUE, NONE, 0,        0 },
  528         { "",      TRUE, NONE, 0,        0 },
  529         { "",      TRUE, NONE, 0,        0 },
  530         { "",      TRUE, NONE, 0,        0 },
  531         { "",      TRUE, NONE, 0,        0 },
  532         { "",      TRUE, NONE, 0,        0 }
  533 };
  534 
  535 static const struct inst db_Grp5[] = {
  536         { "inc",   TRUE, LONG, op1(E),   0 },
  537         { "dec",   TRUE, LONG, op1(E),   0 },
  538         { "call",  TRUE, LONG, op1(Eind),0 },
  539         { "lcall", TRUE, LONG, op1(Eind),0 },
  540         { "jmp",   TRUE, LONG, op1(Eind),0 },
  541         { "ljmp",  TRUE, LONG, op1(Eind),0 },
  542         { "push",  TRUE, LONG, op1(E),   0 },
  543         { "",      TRUE, NONE, 0,        0 }
  544 };
  545 
  546 static const struct inst db_inst_table[256] = {
  547 /*00*/  { "add",   TRUE,  BYTE,  op2(R, E),  0 },
  548 /*01*/  { "add",   TRUE,  LONG,  op2(R, E),  0 },
  549 /*02*/  { "add",   TRUE,  BYTE,  op2(E, R),  0 },
  550 /*03*/  { "add",   TRUE,  LONG,  op2(E, R),  0 },
  551 /*04*/  { "add",   FALSE, BYTE,  op2(I, A),  0 },
  552 /*05*/  { "add",   FALSE, LONG,  op2(Is, A), 0 },
  553 /*06*/  { "push",  FALSE, NONE,  op1(Si),    0 },
  554 /*07*/  { "pop",   FALSE, NONE,  op1(Si),    0 },
  555 
  556 /*08*/  { "or",    TRUE,  BYTE,  op2(R, E),  0 },
  557 /*09*/  { "or",    TRUE,  LONG,  op2(R, E),  0 },
  558 /*0a*/  { "or",    TRUE,  BYTE,  op2(E, R),  0 },
  559 /*0b*/  { "or",    TRUE,  LONG,  op2(E, R),  0 },
  560 /*0c*/  { "or",    FALSE, BYTE,  op2(I, A),  0 },
  561 /*0d*/  { "or",    FALSE, LONG,  op2(I, A),  0 },
  562 /*0e*/  { "push",  FALSE, NONE,  op1(Si),    0 },
  563 /*0f*/  { "",      FALSE, NONE,  0,          0 },
  564 
  565 /*10*/  { "adc",   TRUE,  BYTE,  op2(R, E),  0 },
  566 /*11*/  { "adc",   TRUE,  LONG,  op2(R, E),  0 },
  567 /*12*/  { "adc",   TRUE,  BYTE,  op2(E, R),  0 },
  568 /*13*/  { "adc",   TRUE,  LONG,  op2(E, R),  0 },
  569 /*14*/  { "adc",   FALSE, BYTE,  op2(I, A),  0 },
  570 /*15*/  { "adc",   FALSE, LONG,  op2(Is, A), 0 },
  571 /*16*/  { "push",  FALSE, NONE,  op1(Si),    0 },
  572 /*17*/  { "pop",   FALSE, NONE,  op1(Si),    0 },
  573 
  574 /*18*/  { "sbb",   TRUE,  BYTE,  op2(R, E),  0 },
  575 /*19*/  { "sbb",   TRUE,  LONG,  op2(R, E),  0 },
  576 /*1a*/  { "sbb",   TRUE,  BYTE,  op2(E, R),  0 },
  577 /*1b*/  { "sbb",   TRUE,  LONG,  op2(E, R),  0 },
  578 /*1c*/  { "sbb",   FALSE, BYTE,  op2(I, A),  0 },
  579 /*1d*/  { "sbb",   FALSE, LONG,  op2(Is, A), 0 },
  580 /*1e*/  { "push",  FALSE, NONE,  op1(Si),    0 },
  581 /*1f*/  { "pop",   FALSE, NONE,  op1(Si),    0 },
  582 
  583 /*20*/  { "and",   TRUE,  BYTE,  op2(R, E),  0 },
  584 /*21*/  { "and",   TRUE,  LONG,  op2(R, E),  0 },
  585 /*22*/  { "and",   TRUE,  BYTE,  op2(E, R),  0 },
  586 /*23*/  { "and",   TRUE,  LONG,  op2(E, R),  0 },
  587 /*24*/  { "and",   FALSE, BYTE,  op2(I, A),  0 },
  588 /*25*/  { "and",   FALSE, LONG,  op2(I, A),  0 },
  589 /*26*/  { "",      FALSE, NONE,  0,          0 },
  590 /*27*/  { "daa",   FALSE, NONE,  0,          0 },
  591 
  592 /*28*/  { "sub",   TRUE,  BYTE,  op2(R, E),  0 },
  593 /*29*/  { "sub",   TRUE,  LONG,  op2(R, E),  0 },
  594 /*2a*/  { "sub",   TRUE,  BYTE,  op2(E, R),  0 },
  595 /*2b*/  { "sub",   TRUE,  LONG,  op2(E, R),  0 },
  596 /*2c*/  { "sub",   FALSE, BYTE,  op2(I, A),  0 },
  597 /*2d*/  { "sub",   FALSE, LONG,  op2(Is, A), 0 },
  598 /*2e*/  { "",      FALSE, NONE,  0,          0 },
  599 /*2f*/  { "das",   FALSE, NONE,  0,          0 },
  600 
  601 /*30*/  { "xor",   TRUE,  BYTE,  op2(R, E),  0 },
  602 /*31*/  { "xor",   TRUE,  LONG,  op2(R, E),  0 },
  603 /*32*/  { "xor",   TRUE,  BYTE,  op2(E, R),  0 },
  604 /*33*/  { "xor",   TRUE,  LONG,  op2(E, R),  0 },
  605 /*34*/  { "xor",   FALSE, BYTE,  op2(I, A),  0 },
  606 /*35*/  { "xor",   FALSE, LONG,  op2(I, A),  0 },
  607 /*36*/  { "",      FALSE, NONE,  0,          0 },
  608 /*37*/  { "aaa",   FALSE, NONE,  0,          0 },
  609 
  610 /*38*/  { "cmp",   TRUE,  BYTE,  op2(R, E),  0 },
  611 /*39*/  { "cmp",   TRUE,  LONG,  op2(R, E),  0 },
  612 /*3a*/  { "cmp",   TRUE,  BYTE,  op2(E, R),  0 },
  613 /*3b*/  { "cmp",   TRUE,  LONG,  op2(E, R),  0 },
  614 /*3c*/  { "cmp",   FALSE, BYTE,  op2(I, A),  0 },
  615 /*3d*/  { "cmp",   FALSE, LONG,  op2(Is, A), 0 },
  616 /*3e*/  { "",      FALSE, NONE,  0,          0 },
  617 /*3f*/  { "aas",   FALSE, NONE,  0,          0 },
  618 
  619 /*40*/  { "rex",   FALSE, NONE,  0,          0 },
  620 /*41*/  { "rex.b", FALSE, NONE,  0,          0 },
  621 /*42*/  { "rex.x", FALSE, NONE,  0,          0 },
  622 /*43*/  { "rex.xb", FALSE, NONE, 0,          0 },
  623 /*44*/  { "rex.r", FALSE, NONE,  0,          0 },
  624 /*45*/  { "rex.rb", FALSE, NONE, 0,          0 },
  625 /*46*/  { "rex.rx", FALSE, NONE, 0,          0 },
  626 /*47*/  { "rex.rxb", FALSE, NONE, 0,         0 },
  627 
  628 /*48*/  { "rex.w", FALSE, NONE,  0,          0 },
  629 /*49*/  { "rex.wb", FALSE, NONE, 0,          0 },
  630 /*4a*/  { "rex.wx", FALSE, NONE, 0,          0 },
  631 /*4b*/  { "rex.wxb", FALSE, NONE, 0,         0 },
  632 /*4c*/  { "rex.wr", FALSE, NONE, 0,          0 },
  633 /*4d*/  { "rex.wrb", FALSE, NONE, 0,         0 },
  634 /*4e*/  { "rex.wrx", FALSE, NONE, 0,         0 },
  635 /*4f*/  { "rex.wrxb", FALSE, NONE, 0,        0 },
  636 
  637 /*50*/  { "push",  FALSE, LONG,  op1(Ri),    0 },
  638 /*51*/  { "push",  FALSE, LONG,  op1(Ri),    0 },
  639 /*52*/  { "push",  FALSE, LONG,  op1(Ri),    0 },
  640 /*53*/  { "push",  FALSE, LONG,  op1(Ri),    0 },
  641 /*54*/  { "push",  FALSE, LONG,  op1(Ri),    0 },
  642 /*55*/  { "push",  FALSE, LONG,  op1(Ri),    0 },
  643 /*56*/  { "push",  FALSE, LONG,  op1(Ri),    0 },
  644 /*57*/  { "push",  FALSE, LONG,  op1(Ri),    0 },
  645 
  646 /*58*/  { "pop",   FALSE, LONG,  op1(Ri),    0 },
  647 /*59*/  { "pop",   FALSE, LONG,  op1(Ri),    0 },
  648 /*5a*/  { "pop",   FALSE, LONG,  op1(Ri),    0 },
  649 /*5b*/  { "pop",   FALSE, LONG,  op1(Ri),    0 },
  650 /*5c*/  { "pop",   FALSE, LONG,  op1(Ri),    0 },
  651 /*5d*/  { "pop",   FALSE, LONG,  op1(Ri),    0 },
  652 /*5e*/  { "pop",   FALSE, LONG,  op1(Ri),    0 },
  653 /*5f*/  { "pop",   FALSE, LONG,  op1(Ri),    0 },
  654 
  655 /*60*/  { "pusha", FALSE, LONG,  0,          0 },
  656 /*61*/  { "popa",  FALSE, LONG,  0,          0 },
  657 /*62*/  { "bound", TRUE,  LONG,  op2(E, R),  0 },
  658 /*63*/  { "movslq",  TRUE,  NONE,  op2(EL,R), 0 },
  659 
  660 /*64*/  { "",      FALSE, NONE,  0,          0 },
  661 /*65*/  { "",      FALSE, NONE,  0,          0 },
  662 /*66*/  { "",      FALSE, NONE,  0,          0 },
  663 /*67*/  { "",      FALSE, NONE,  0,          0 },
  664 
  665 /*68*/  { "push",  FALSE, LONG,  op1(I),     0 },
  666 /*69*/  { "imul",  TRUE,  LONG,  op3(I,E,R), 0 },
  667 /*6a*/  { "push",  FALSE, LONG,  op1(Ibs),   0 },
  668 /*6b*/  { "imul",  TRUE,  LONG,  op3(Ibs,E,R),0 },
  669 /*6c*/  { "ins",   FALSE, BYTE,  op2(DX, DI), 0 },
  670 /*6d*/  { "ins",   FALSE, LONG,  op2(DX, DI), 0 },
  671 /*6e*/  { "outs",  FALSE, BYTE,  op2(SI, DX), 0 },
  672 /*6f*/  { "outs",  FALSE, LONG,  op2(SI, DX), 0 },
  673 
  674 /*70*/  { "jo",    FALSE, NONE,  op1(Db),     0 },
  675 /*71*/  { "jno",   FALSE, NONE,  op1(Db),     0 },
  676 /*72*/  { "jb",    FALSE, NONE,  op1(Db),     0 },
  677 /*73*/  { "jnb",   FALSE, NONE,  op1(Db),     0 },
  678 /*74*/  { "jz",    FALSE, NONE,  op1(Db),     0 },
  679 /*75*/  { "jnz",   FALSE, NONE,  op1(Db),     0 },
  680 /*76*/  { "jbe",   FALSE, NONE,  op1(Db),     0 },
  681 /*77*/  { "jnbe",  FALSE, NONE,  op1(Db),     0 },
  682 
  683 /*78*/  { "js",    FALSE, NONE,  op1(Db),     0 },
  684 /*79*/  { "jns",   FALSE, NONE,  op1(Db),     0 },
  685 /*7a*/  { "jp",    FALSE, NONE,  op1(Db),     0 },
  686 /*7b*/  { "jnp",   FALSE, NONE,  op1(Db),     0 },
  687 /*7c*/  { "jl",    FALSE, NONE,  op1(Db),     0 },
  688 /*7d*/  { "jnl",   FALSE, NONE,  op1(Db),     0 },
  689 /*7e*/  { "jle",   FALSE, NONE,  op1(Db),     0 },
  690 /*7f*/  { "jnle",  FALSE, NONE,  op1(Db),     0 },
  691 
  692 /*80*/  { "",      TRUE,  BYTE,  op2(I, E),   db_Grp1 },
  693 /*81*/  { "",      TRUE,  LONG,  op2(I, E),   db_Grp1 },
  694 /*82*/  { "",      TRUE,  BYTE,  op2(I, E),   db_Grp1 },
  695 /*83*/  { "",      TRUE,  LONG,  op2(Ibs,E),  db_Grp1 },
  696 /*84*/  { "test",  TRUE,  BYTE,  op2(R, E),   0 },
  697 /*85*/  { "test",  TRUE,  LONG,  op2(R, E),   0 },
  698 /*86*/  { "xchg",  TRUE,  BYTE,  op2(R, E),   0 },
  699 /*87*/  { "xchg",  TRUE,  LONG,  op2(R, E),   0 },
  700 
  701 /*88*/  { "mov",   TRUE,  BYTE,  op2(R, E),   0 },
  702 /*89*/  { "mov",   TRUE,  LONG,  op2(R, E),   0 },
  703 /*8a*/  { "mov",   TRUE,  BYTE,  op2(E, R),   0 },
  704 /*8b*/  { "mov",   TRUE,  LONG,  op2(E, R),   0 },
  705 /*8c*/  { "mov",   TRUE,  NONE,  op2(S, Ew),  0 },
  706 /*8d*/  { "lea",   TRUE,  LONG,  op2(E, R),   0 },
  707 /*8e*/  { "mov",   TRUE,  NONE,  op2(Ew, S),  0 },
  708 /*8f*/  { "pop",   TRUE,  LONG,  op1(E),      0 },
  709 
  710 /*90*/  { "nop",   FALSE, NONE,  0,           0 },
  711 /*91*/  { "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
  712 /*92*/  { "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
  713 /*93*/  { "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
  714 /*94*/  { "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
  715 /*95*/  { "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
  716 /*96*/  { "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
  717 /*97*/  { "xchg",  FALSE, LONG,  op2(A, Ri),  0 },
  718 
  719 /*98*/  { "cbw",   FALSE, SDEP,  0,           "cwde" }, /* cbw/cwde */
  720 /*99*/  { "cwd",   FALSE, SDEP,  0,           "cdq"  }, /* cwd/cdq */
  721 /*9a*/  { "lcall", FALSE, NONE,  op1(OS),     0 },
  722 /*9b*/  { "wait",  FALSE, NONE,  0,           0 },
  723 /*9c*/  { "pushf", FALSE, LONG,  0,           0 },
  724 /*9d*/  { "popf",  FALSE, LONG,  0,           0 },
  725 /*9e*/  { "sahf",  FALSE, NONE,  0,           0 },
  726 /*9f*/  { "lahf",  FALSE, NONE,  0,           0 },
  727 
  728 /*a0*/  { "mov",   FALSE, BYTE,  op2(O, A),   0 },
  729 /*a1*/  { "mov",   FALSE, LONG,  op2(O, A),   0 },
  730 /*a2*/  { "mov",   FALSE, BYTE,  op2(A, O),   0 },
  731 /*a3*/  { "mov",   FALSE, LONG,  op2(A, O),   0 },
  732 /*a4*/  { "movs",  FALSE, BYTE,  op2(SI,DI),  0 },
  733 /*a5*/  { "movs",  FALSE, LONG,  op2(SI,DI),  0 },
  734 /*a6*/  { "cmps",  FALSE, BYTE,  op2(SI,DI),  0 },
  735 /*a7*/  { "cmps",  FALSE, LONG,  op2(SI,DI),  0 },
  736 
  737 /*a8*/  { "test",  FALSE, BYTE,  op2(I, A),   0 },
  738 /*a9*/  { "test",  FALSE, LONG,  op2(I, A),   0 },
  739 /*aa*/  { "stos",  FALSE, BYTE,  op1(DI),     0 },
  740 /*ab*/  { "stos",  FALSE, LONG,  op1(DI),     0 },
  741 /*ac*/  { "lods",  FALSE, BYTE,  op1(SI),     0 },
  742 /*ad*/  { "lods",  FALSE, LONG,  op1(SI),     0 },
  743 /*ae*/  { "scas",  FALSE, BYTE,  op1(SI),     0 },
  744 /*af*/  { "scas",  FALSE, LONG,  op1(SI),     0 },
  745 
  746 /*b0*/  { "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
  747 /*b1*/  { "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
  748 /*b2*/  { "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
  749 /*b3*/  { "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
  750 /*b4*/  { "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
  751 /*b5*/  { "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
  752 /*b6*/  { "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
  753 /*b7*/  { "mov",   FALSE, BYTE,  op2(I, Ri),  0 },
  754 
  755 /*b8*/  { "mov",   FALSE, LONG,  op2(Ilq, Ri),  0 },
  756 /*b9*/  { "mov",   FALSE, LONG,  op2(Ilq, Ri),  0 },
  757 /*ba*/  { "mov",   FALSE, LONG,  op2(Ilq, Ri),  0 },
  758 /*bb*/  { "mov",   FALSE, LONG,  op2(Ilq, Ri),  0 },
  759 /*bc*/  { "mov",   FALSE, LONG,  op2(Ilq, Ri),  0 },
  760 /*bd*/  { "mov",   FALSE, LONG,  op2(Ilq, Ri),  0 },
  761 /*be*/  { "mov",   FALSE, LONG,  op2(Ilq, Ri),  0 },
  762 /*bf*/  { "mov",   FALSE, LONG,  op2(Ilq, Ri),  0 },
  763 
  764 /*c0*/  { "",      TRUE,  BYTE,  op2(Ib, E),  db_Grp2 },
  765 /*c1*/  { "",      TRUE,  LONG,  op2(Ib, E),  db_Grp2 },
  766 /*c2*/  { "ret",   FALSE, NONE,  op1(Iw),     0 },
  767 /*c3*/  { "ret",   FALSE, NONE,  0,           0 },
  768 /*c4*/  { "les",   TRUE,  LONG,  op2(E, R),   0 },
  769 /*c5*/  { "lds",   TRUE,  LONG,  op2(E, R),   0 },
  770 /*c6*/  { "mov",   TRUE,  BYTE,  op2(I, E),   0 },
  771 /*c7*/  { "mov",   TRUE,  LONG,  op2(I, E),   0 },
  772 
  773 /*c8*/  { "enter", FALSE, NONE,  op2(Iw, Ib), 0 },
  774 /*c9*/  { "leave", FALSE, NONE,  0,           0 },
  775 /*ca*/  { "lret",  FALSE, NONE,  op1(Iw),     0 },
  776 /*cb*/  { "lret",  FALSE, NONE,  0,           0 },
  777 /*cc*/  { "int",   FALSE, NONE,  op1(o3),     0 },
  778 /*cd*/  { "int",   FALSE, NONE,  op1(Ib),     0 },
  779 /*ce*/  { "into",  FALSE, NONE,  0,           0 },
  780 /*cf*/  { "iret",  FALSE, NONE,  0,           0 },
  781 
  782 /*d0*/  { "",      TRUE,  BYTE,  op2(o1, E),  db_Grp2 },
  783 /*d1*/  { "",      TRUE,  LONG,  op2(o1, E),  db_Grp2 },
  784 /*d2*/  { "",      TRUE,  BYTE,  op2(CL, E),  db_Grp2 },
  785 /*d3*/  { "",      TRUE,  LONG,  op2(CL, E),  db_Grp2 },
  786 /*d4*/  { "aam",   FALSE, NONE,  op1(Iba),    0 },
  787 /*d5*/  { "aad",   FALSE, NONE,  op1(Iba),    0 },
  788 /*d6*/  { ".byte\t0xd6", FALSE, NONE, 0,      0 },
  789 /*d7*/  { "xlat",  FALSE, BYTE,  op1(BX),     0 },
  790 
  791 /*d8*/  { "",      TRUE,  NONE,  0,           db_Esc8 },
  792 /*d9*/  { "",      TRUE,  NONE,  0,           db_Esc9 },
  793 /*da*/  { "",      TRUE,  NONE,  0,           db_Esca },
  794 /*db*/  { "",      TRUE,  NONE,  0,           db_Escb },
  795 /*dc*/  { "",      TRUE,  NONE,  0,           db_Escc },
  796 /*dd*/  { "",      TRUE,  NONE,  0,           db_Escd },
  797 /*de*/  { "",      TRUE,  NONE,  0,           db_Esce },
  798 /*df*/  { "",      TRUE,  NONE,  0,           db_Escf },
  799 
  800 /*e0*/  { "loopne",FALSE, NONE,  op1(Db),     0 },
  801 /*e1*/  { "loope", FALSE, NONE,  op1(Db),     0 },
  802 /*e2*/  { "loop",  FALSE, NONE,  op1(Db),     0 },
  803 /*e3*/  { "jcxz",  FALSE, SDEP,  op1(Db),     "jecxz" },
  804 /*e4*/  { "in",    FALSE, BYTE,  op2(Ib, A),  0 },
  805 /*e5*/  { "in",    FALSE, LONG,  op2(Ib, A) , 0 },
  806 /*e6*/  { "out",   FALSE, BYTE,  op2(A, Ib),  0 },
  807 /*e7*/  { "out",   FALSE, LONG,  op2(A, Ib) , 0 },
  808 
  809 /*e8*/  { "call",  FALSE, NONE,  op1(Dl),     0 },
  810 /*e9*/  { "jmp",   FALSE, NONE,  op1(Dl),     0 },
  811 /*ea*/  { "ljmp",  FALSE, NONE,  op1(OS),     0 },
  812 /*eb*/  { "jmp",   FALSE, NONE,  op1(Db),     0 },
  813 /*ec*/  { "in",    FALSE, BYTE,  op2(DX, A),  0 },
  814 /*ed*/  { "in",    FALSE, LONG,  op2(DX, A) , 0 },
  815 /*ee*/  { "out",   FALSE, BYTE,  op2(A, DX),  0 },
  816 /*ef*/  { "out",   FALSE, LONG,  op2(A, DX) , 0 },
  817 
  818 /*f0*/  { "",      FALSE, NONE,  0,          0 },
  819 /*f1*/  { ".byte\t0xf1", FALSE, NONE, 0,     0 },
  820 /*f2*/  { "",      FALSE, NONE,  0,          0 },
  821 /*f3*/  { "",      FALSE, NONE,  0,          0 },
  822 /*f4*/  { "hlt",   FALSE, NONE,  0,          0 },
  823 /*f5*/  { "cmc",   FALSE, NONE,  0,          0 },
  824 /*f6*/  { "",      TRUE,  BYTE,  0,          db_Grp3 },
  825 /*f7*/  { "",      TRUE,  LONG,  0,          db_Grp3 },
  826 
  827 /*f8*/  { "clc",   FALSE, NONE,  0,          0 },
  828 /*f9*/  { "stc",   FALSE, NONE,  0,          0 },
  829 /*fa*/  { "cli",   FALSE, NONE,  0,          0 },
  830 /*fb*/  { "sti",   FALSE, NONE,  0,          0 },
  831 /*fc*/  { "cld",   FALSE, NONE,  0,          0 },
  832 /*fd*/  { "std",   FALSE, NONE,  0,          0 },
  833 /*fe*/  { "",      TRUE,  NONE,  0,          db_Grp4 },
  834 /*ff*/  { "",      TRUE,  NONE,  0,          db_Grp5 },
  835 };
  836 
  837 static const struct inst db_bad_inst =
  838         { "???",   FALSE, NONE,  0,           0 }
  839 ;
  840 
  841 #define f_mod(rex, byte)        ((byte)>>6)
  842 #define f_reg(rex, byte)        ((((byte)>>3)&0x7) | (rex & REX_R ? 0x8 : 0x0))
  843 #define f_rm(rex, byte)         (((byte)&0x7) | (rex & REX_B ? 0x8 : 0x0))
  844 
  845 #define sib_ss(rex, byte)       ((byte)>>6)
  846 #define sib_index(rex, byte)    ((((byte)>>3)&0x7) | (rex & REX_X ? 0x8 : 0x0))
  847 #define sib_base(rex, byte)     (((byte)&0x7) | (rex & REX_B ? 0x8 : 0x0))
  848 
  849 struct i_addr {
  850         int             is_reg; /* if reg, reg number is in 'disp' */
  851         int             disp;
  852         const char *    base;
  853         const char *    index;
  854         int             ss;
  855 };
  856 
  857 static const char * const db_reg[2][4][16] = {
  858 
  859         {{"%al",  "%cl",  "%dl",  "%bl",  "%ah",  "%ch",  "%dh",  "%bh",
  860           "%r8b", "%r9b", "%r10b", "%r11b", "%r12b", "%r13b", "%r14b", "%r15b" },
  861         { "%ax",  "%cx",  "%dx",  "%bx",  "%sp",  "%bp",  "%si",  "%di",
  862           "%r8w", "%r9w", "%r10w", "%r11w", "%r12w", "%r13w", "%r14w", "%r15w" },
  863         { "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi",
  864           "%r8d", "%r9d", "%r10d", "%r11d", "%r12d", "%r13d", "%r14d", "%r15d" },
  865         { "%rax", "%rcx", "%rdx", "%rbx", "%rsp", "%rbp", "%rsi", "%rdi",
  866           "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15" }},
  867 
  868         {{"%al",  "%cl",  "%dl",  "%bl",  "%spl",  "%bpl",  "%sil",  "%dil",
  869           "%r8b", "%r9b", "%r10b", "%r11b", "%r12b", "%r13b", "%r14b", "%r15b" },
  870         { "%ax",  "%cx",  "%dx",  "%bx",  "%sp",  "%bp",  "%si",  "%di",
  871           "%r8w", "%r9w", "%r10w", "%r11w", "%r12w", "%r13w", "%r14w", "%r15w" },
  872         { "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi",
  873           "%r8d", "%r9d", "%r10d", "%r11d", "%r12d", "%r13d", "%r14d", "%r15d" },
  874         { "%rax", "%rcx", "%rdx", "%rbx", "%rsp", "%rbp", "%rsi", "%rdi",
  875           "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15" }}
  876 };
  877 
  878 static const char * const db_seg_reg[8] = {
  879         "%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", ""
  880 };
  881 
  882 /*
  883  * lengths for size attributes
  884  */
  885 static const int db_lengths[] = {
  886         1,      /* BYTE */
  887         2,      /* WORD */
  888         4,      /* LONG */
  889         8,      /* QUAD */
  890         4,      /* SNGL */
  891         8,      /* DBLR */
  892         10,     /* EXTR */
  893 };
  894 
  895 #define get_value_inc(result, loc, size, is_signed) \
  896         result = db_get_value((loc), (size), (is_signed)); \
  897         (loc) += (size);
  898 
  899 static db_addr_t
  900                 db_disasm_esc(db_addr_t loc, int inst, int rex, int short_addr,
  901                     int size, const char *seg);
  902 static void     db_print_address(const char *seg, int size, int rex,
  903                     struct i_addr *addrp);
  904 static db_addr_t
  905                 db_read_address(db_addr_t loc, int short_addr, int rex, int regmodrm,
  906                     struct i_addr *addrp);
  907 
  908 /*
  909  * Read address at location and return updated location.
  910  */
  911 static db_addr_t
  912 db_read_address(loc, short_addr, rex, regmodrm, addrp)
  913         db_addr_t       loc;
  914         int             short_addr;
  915         int             rex;
  916         int             regmodrm;
  917         struct i_addr * addrp;          /* out */
  918 {
  919         int             mod, rm, sib, index, disp, size, have_sib;
  920 
  921         mod = f_mod(rex, regmodrm);
  922         rm  = f_rm(rex, regmodrm);
  923 
  924         if (mod == 3) {
  925             addrp->is_reg = TRUE;
  926             addrp->disp = rm;
  927             return (loc);
  928         }
  929         addrp->is_reg = FALSE;
  930         addrp->index = 0;
  931 
  932         if (short_addr)
  933             size = LONG;
  934         else
  935             size = QUAD;
  936 
  937         if ((rm & 0x7) == 4) {
  938             get_value_inc(sib, loc, 1, FALSE);
  939             rm = sib_base(rex, sib);
  940             index = sib_index(rex, sib);
  941             if (index != 4)
  942                 addrp->index = db_reg[1][size][index];
  943             addrp->ss = sib_ss(rex, sib);
  944             have_sib = 1;
  945         } else
  946             have_sib = 0;
  947 
  948         switch (mod) {
  949             case 0:
  950                 if (rm == 5) {
  951                     get_value_inc(addrp->disp, loc, 4, FALSE);
  952                     if (have_sib)
  953                         addrp->base = 0;
  954                     else if (short_addr)
  955                         addrp->base = "%eip";
  956                     else
  957                         addrp->base = "%rip";
  958                 } else {
  959                     addrp->disp = 0;
  960                     addrp->base = db_reg[1][size][rm];
  961                 }
  962                 break;
  963 
  964             case 1:
  965                 get_value_inc(disp, loc, 1, TRUE);
  966                 addrp->disp = disp;
  967                 addrp->base = db_reg[1][size][rm];
  968                 break;
  969 
  970             case 2:
  971                 get_value_inc(disp, loc, 4, FALSE);
  972                 addrp->disp = disp;
  973                 addrp->base = db_reg[1][size][rm];
  974                 break;
  975         }
  976         return (loc);
  977 }
  978 
  979 static void
  980 db_print_address(seg, size, rex, addrp)
  981         const char *    seg;
  982         int             size;
  983         int             rex;
  984         struct i_addr * addrp;
  985 {
  986         if (addrp->is_reg) {
  987             db_printf("%s", db_reg[rex != 0 ? 1 : 0][(size == LONG && (rex & REX_W)) ? QUAD : size][addrp->disp]);
  988             return;
  989         }
  990 
  991         if (seg) {
  992             db_printf("%s:", seg);
  993         }
  994 
  995         if (addrp->disp != 0 || (addrp->base == 0 && addrp->index == 0))
  996                 db_printsym((db_addr_t)addrp->disp, DB_STGY_ANY);
  997         if (addrp->base != 0 || addrp->index != 0) {
  998             db_printf("(");
  999             if (addrp->base)
 1000                 db_printf("%s", addrp->base);
 1001             if (addrp->index)
 1002                 db_printf(",%s,%d", addrp->index, 1<<addrp->ss);
 1003             db_printf(")");
 1004         }
 1005 }
 1006 
 1007 /*
 1008  * Disassemble floating-point ("escape") instruction
 1009  * and return updated location.
 1010  */
 1011 static db_addr_t
 1012 db_disasm_esc(loc, inst, rex, short_addr, size, seg)
 1013         db_addr_t       loc;
 1014         int             inst;
 1015         int             rex;
 1016         int             short_addr;
 1017         int             size;
 1018         const char *    seg;
 1019 {
 1020         int             regmodrm;
 1021         const struct finst *    fp;
 1022         int             mod;
 1023         struct i_addr   address;
 1024         const char *    name;
 1025 
 1026         get_value_inc(regmodrm, loc, 1, FALSE);
 1027         fp = &db_Esc_inst[inst - 0xd8][f_reg(rex, regmodrm)];
 1028         mod = f_mod(rex, regmodrm);
 1029         if (mod != 3) {
 1030             if (*fp->f_name == '\0') {
 1031                 db_printf("<bad instruction>");
 1032                 return (loc);
 1033             }
 1034             /*
 1035              * Normal address modes.
 1036              */
 1037             loc = db_read_address(loc, short_addr, rex, regmodrm, &address);
 1038             db_printf("%s", fp->f_name);
 1039             switch(fp->f_size) {
 1040                 case SNGL:
 1041                     db_printf("s");
 1042                     break;
 1043                 case DBLR:
 1044                     db_printf("l");
 1045                     break;
 1046                 case EXTR:
 1047                     db_printf("t");
 1048                     break;
 1049                 case WORD:
 1050                     db_printf("s");
 1051                     break;
 1052                 case LONG:
 1053                     db_printf("l");
 1054                     break;
 1055                 case QUAD:
 1056                     db_printf("q");
 1057                     break;
 1058                 default:
 1059                     break;
 1060             }
 1061             db_printf("\t");
 1062             db_print_address(seg, BYTE, rex, &address);
 1063         }
 1064         else {
 1065             /*
 1066              * 'reg-reg' - special formats
 1067              */
 1068             switch (fp->f_rrmode) {
 1069                 case op2(ST,STI):
 1070                     name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
 1071                     db_printf("%s\t%%st,%%st(%d)",name,f_rm(rex, regmodrm));
 1072                     break;
 1073                 case op2(STI,ST):
 1074                     name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
 1075                     db_printf("%s\t%%st(%d),%%st",name, f_rm(rex, regmodrm));
 1076                     break;
 1077                 case op1(STI):
 1078                     name = (fp->f_rrname) ? fp->f_rrname : fp->f_name;
 1079                     db_printf("%s\t%%st(%d)",name, f_rm(rex, regmodrm));
 1080                     break;
 1081                 case op1(X):
 1082                     name = ((const char * const *)fp->f_rrname)[f_rm(rex, regmodrm)];
 1083                     if (*name == '\0')
 1084                         goto bad;
 1085                     db_printf("%s", name);
 1086                     break;
 1087                 case op1(XA):
 1088                     name = ((const char * const *)fp->f_rrname)[f_rm(rex, regmodrm)];
 1089                     if (*name == '\0')
 1090                         goto bad;
 1091                     db_printf("%s\t%%ax", name);
 1092                     break;
 1093                 default:
 1094                 bad:
 1095                     db_printf("<bad instruction>");
 1096                     break;
 1097             }
 1098         }
 1099 
 1100         return (loc);
 1101 }
 1102 
 1103 /*
 1104  * Disassemble instruction at 'loc'.  'altfmt' specifies an
 1105  * (optional) alternate format.  Return address of start of
 1106  * next instruction.
 1107  */
 1108 db_addr_t
 1109 db_disasm(loc, altfmt)
 1110         db_addr_t       loc;
 1111         boolean_t       altfmt;
 1112 {
 1113         int     inst;
 1114         int     size;
 1115         int     short_addr;
 1116         const char *    seg;
 1117         const struct inst *     ip;
 1118         const char *    i_name;
 1119         int     i_size;
 1120         int     i_mode;
 1121         int     rex = 0;
 1122         int     regmodrm = 0;
 1123         boolean_t       first;
 1124         int     displ;
 1125         int     prefix;
 1126         int     imm;
 1127         int     imm2;
 1128         long    imm64;
 1129         int     len;
 1130         struct i_addr   address;
 1131 
 1132         get_value_inc(inst, loc, 1, FALSE);
 1133         short_addr = FALSE;
 1134         size = LONG;
 1135         seg = 0;
 1136 
 1137         /*
 1138          * Get prefixes
 1139          */
 1140         prefix = TRUE;
 1141         do {
 1142             switch (inst) {
 1143                 case 0x66:              /* data16 */
 1144                     size = WORD;
 1145                     break;
 1146                 case 0x67:
 1147                     short_addr = TRUE;
 1148                     break;
 1149                 case 0x26:
 1150                     seg = "%es";
 1151                     break;
 1152                 case 0x36:
 1153                     seg = "%ss";
 1154                     break;
 1155                 case 0x2e:
 1156                     seg = "%cs";
 1157                     break;
 1158                 case 0x3e:
 1159                     seg = "%ds";
 1160                     break;
 1161                 case 0x64:
 1162                     seg = "%fs";
 1163                     break;
 1164                 case 0x65:
 1165                     seg = "%gs";
 1166                     break;
 1167                 case 0xf0:
 1168                     db_printf("lock ");
 1169                     break;
 1170                 case 0xf2:
 1171                     db_printf("repne ");
 1172                     break;
 1173                 case 0xf3:
 1174                     db_printf("repe "); /* XXX repe VS rep */
 1175                     break;
 1176                 default:
 1177                     prefix = FALSE;
 1178                     break;
 1179             }
 1180             if (inst >= 0x40 && inst < 0x50) {
 1181                 rex = inst;
 1182                 prefix = TRUE;
 1183             }
 1184             if (prefix) {
 1185                 get_value_inc(inst, loc, 1, FALSE);
 1186             }
 1187         } while (prefix);
 1188 
 1189         if (inst >= 0xd8 && inst <= 0xdf) {
 1190             loc = db_disasm_esc(loc, inst, rex, short_addr, size, seg);
 1191             db_printf("\n");
 1192             return (loc);
 1193         }
 1194 
 1195         if (inst == 0x0f) {
 1196             get_value_inc(inst, loc, 1, FALSE);
 1197             ip = db_inst_0f[inst>>4];
 1198             if (ip == 0) {
 1199                 ip = &db_bad_inst;
 1200             }
 1201             else {
 1202                 ip = &ip[inst&0xf];
 1203             }
 1204         }
 1205         else
 1206             ip = &db_inst_table[inst];
 1207 
 1208         if (ip->i_has_modrm) {
 1209             get_value_inc(regmodrm, loc, 1, FALSE);
 1210             loc = db_read_address(loc, short_addr, rex, regmodrm, &address);
 1211         }
 1212 
 1213         i_name = ip->i_name;
 1214         i_size = ip->i_size;
 1215         i_mode = ip->i_mode;
 1216 
 1217         if (ip->i_extra == db_Grp1 || ip->i_extra == db_Grp2 ||
 1218             ip->i_extra == db_Grp6 || ip->i_extra == db_Grp7 ||
 1219             ip->i_extra == db_Grp8 || ip->i_extra == db_Grp9) {
 1220             i_name = ((const char * const *)ip->i_extra)[f_reg(rex, regmodrm)];
 1221         }
 1222         else if (ip->i_extra == db_Grp3) {
 1223             ip = ip->i_extra;
 1224             ip = &ip[f_reg(rex, regmodrm)];
 1225             i_name = ip->i_name;
 1226             i_mode = ip->i_mode;
 1227         }
 1228         else if (ip->i_extra == db_Grp4 || ip->i_extra == db_Grp5) {
 1229             ip = ip->i_extra;
 1230             ip = &ip[f_reg(rex, regmodrm)];
 1231             i_name = ip->i_name;
 1232             i_mode = ip->i_mode;
 1233             i_size = ip->i_size;
 1234         }
 1235 
 1236         if (i_size == SDEP) {
 1237             if (size == WORD)
 1238                 db_printf("%s", i_name);
 1239             else
 1240                 db_printf("%s", (const char *)ip->i_extra);
 1241         }
 1242         else {
 1243             db_printf("%s", i_name);
 1244             if ((inst >= 0x50 && inst <= 0x5f) || inst == 0x68 || inst == 0x6a) {
 1245                 i_size = NONE;
 1246                 db_printf("q");
 1247             }
 1248             if (i_size != NONE) {
 1249                 if (i_size == BYTE) {
 1250                     db_printf("b");
 1251                     size = BYTE;
 1252                 }
 1253                 else if (i_size == WORD) {
 1254                     db_printf("w");
 1255                     size = WORD;
 1256                 }
 1257                 else if (size == WORD)
 1258                     db_printf("w");
 1259                 else {
 1260                     if (rex & REX_W)
 1261                         db_printf("q");
 1262                     else
 1263                         db_printf("l");
 1264                 }
 1265             }
 1266         }
 1267         db_printf("\t");
 1268         for (first = TRUE;
 1269              i_mode != 0;
 1270              i_mode >>= 8, first = FALSE)
 1271         {
 1272             if (!first)
 1273                 db_printf(",");
 1274 
 1275             switch (i_mode & 0xFF) {
 1276 
 1277                 case E:
 1278                     db_print_address(seg, size, rex, &address);
 1279                     break;
 1280 
 1281                 case Eind:
 1282                     db_printf("*");
 1283                     db_print_address(seg, size, rex, &address);
 1284                     break;
 1285 
 1286                 case El:
 1287                     db_print_address(seg, (rex & REX_W) ? QUAD : LONG, rex, &address);
 1288                     break;
 1289 
 1290                 case EL:
 1291                     db_print_address(seg, LONG, 0, &address);
 1292                     break;
 1293 
 1294                 case Ew:
 1295                     db_print_address(seg, WORD, rex, &address);
 1296                     break;
 1297 
 1298                 case Eb:
 1299                     db_print_address(seg, BYTE, rex, &address);
 1300                     break;
 1301 
 1302                 case R:
 1303                     db_printf("%s", db_reg[rex != 0 ? 1 : 0][(size == LONG && (rex & REX_W)) ? QUAD : size][f_reg(rex, regmodrm)]);
 1304                     break;
 1305 
 1306                 case Rw:
 1307                     db_printf("%s", db_reg[rex != 0 ? 1 : 0][WORD][f_reg(rex, regmodrm)]);
 1308                     break;
 1309 
 1310                 case Ri:
 1311                     db_printf("%s", db_reg[0][QUAD][f_rm(rex, inst)]);
 1312                     break;
 1313 
 1314                 case Ril:
 1315                     db_printf("%s", db_reg[rex != 0 ? 1 : 0][(rex & REX_R) ? QUAD : LONG][f_rm(rex, inst)]);
 1316                     break;
 1317 
 1318                 case S:
 1319                     db_printf("%s", db_seg_reg[f_reg(rex, regmodrm)]);
 1320                     break;
 1321 
 1322                 case Si:
 1323                     db_printf("%s", db_seg_reg[f_reg(rex, inst)]);
 1324                     break;
 1325 
 1326                 case A:
 1327                     db_printf("%s", db_reg[rex != 0 ? 1 : 0][size][0]); /* acc */
 1328                     break;
 1329 
 1330                 case BX:
 1331                     if (seg)
 1332                         db_printf("%s:", seg);
 1333                     db_printf("(%s)", short_addr ? "%bx" : "%ebx");
 1334                     break;
 1335 
 1336                 case CL:
 1337                     db_printf("%%cl");
 1338                     break;
 1339 
 1340                 case DX:
 1341                     db_printf("%%dx");
 1342                     break;
 1343 
 1344                 case SI:
 1345                     if (seg)
 1346                         db_printf("%s:", seg);
 1347                     db_printf("(%s)", short_addr ? "%si" : "%rsi");
 1348                     break;
 1349 
 1350                 case DI:
 1351                     db_printf("%%es:(%s)", short_addr ? "%di" : "%rdi");
 1352                     break;
 1353 
 1354                 case CR:
 1355                     db_printf("%%cr%d", f_reg(rex, regmodrm));
 1356                     break;
 1357 
 1358                 case DR:
 1359                     db_printf("%%dr%d", f_reg(rex, regmodrm));
 1360                     break;
 1361 
 1362                 case TR:
 1363                     db_printf("%%tr%d", f_reg(rex, regmodrm));
 1364                     break;
 1365 
 1366                 case I:
 1367                     len = db_lengths[size];
 1368                     get_value_inc(imm, loc, len, FALSE);
 1369                     db_printf("$%#r", imm);
 1370                     break;
 1371 
 1372                 case Is:
 1373                     len = db_lengths[(size == LONG && (rex & REX_W)) ? QUAD : size];
 1374                     get_value_inc(imm, loc, len, FALSE);
 1375                     db_printf("$%+#r", imm);
 1376                     break;
 1377 
 1378                 case Ib:
 1379                     get_value_inc(imm, loc, 1, FALSE);
 1380                     db_printf("$%#r", imm);
 1381                     break;
 1382 
 1383                 case Iba:
 1384                     get_value_inc(imm, loc, 1, FALSE);
 1385                     if (imm != 0x0a)
 1386                         db_printf("$%#r", imm);
 1387                     break;
 1388 
 1389                 case Ibs:
 1390                     get_value_inc(imm, loc, 1, TRUE);
 1391                     if (size == WORD)
 1392                         imm &= 0xFFFF;
 1393                     db_printf("$%+#r", imm);
 1394                     break;
 1395 
 1396                 case Iw:
 1397                     get_value_inc(imm, loc, 2, FALSE);
 1398                     db_printf("$%#r", imm);
 1399                     break;
 1400 
 1401                 case Ilq:
 1402                     len = db_lengths[rex & REX_W ? QUAD : LONG];
 1403                     get_value_inc(imm64, loc, len, FALSE);
 1404                     db_printf("$%#lr", imm64);
 1405                     break;
 1406 
 1407                 case O:
 1408                     len = (short_addr ? 2 : 4);
 1409                     get_value_inc(displ, loc, len, FALSE);
 1410                     if (seg)
 1411                         db_printf("%s:%+#r",seg, displ);
 1412                     else
 1413                         db_printsym((db_addr_t)displ, DB_STGY_ANY);
 1414                     break;
 1415 
 1416                 case Db:
 1417                     get_value_inc(displ, loc, 1, TRUE);
 1418                     displ += loc;
 1419                     if (size == WORD)
 1420                         displ &= 0xFFFF;
 1421                     db_printsym((db_addr_t)displ, DB_STGY_XTRN);
 1422                     break;
 1423 
 1424                 case Dl:
 1425                     len = db_lengths[(size == LONG && (rex & REX_W)) ? QUAD : size];
 1426                     get_value_inc(displ, loc, len, FALSE);
 1427                     displ += loc;
 1428                     if (size == WORD)
 1429                         displ &= 0xFFFF;
 1430                     db_printsym((db_addr_t)displ, DB_STGY_XTRN);
 1431                     break;
 1432 
 1433                 case o1:
 1434                     db_printf("$1");
 1435                     break;
 1436 
 1437                 case o3:
 1438                     db_printf("$3");
 1439                     break;
 1440 
 1441                 case OS:
 1442                     len = db_lengths[size];
 1443                     get_value_inc(imm, loc, len, FALSE);        /* offset */
 1444                     get_value_inc(imm2, loc, 2, FALSE); /* segment */
 1445                     db_printf("$%#r,%#r", imm2, imm);
 1446                     break;
 1447             }
 1448         }
 1449         db_printf("\n");
 1450         return (loc);
 1451 }

Cache object: e57f269c7334aa802c3fec2cb9c487ca


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