debugger/types.c

   1 /*
   2  * File types.c - datatype handling stuff for internal debugger.
   3  *
   4  * Copyright (C) 1997, Eric Youngdale.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  * Note: This really doesn't do much at the moment, but it forms the framework
  21  * upon which full support for datatype handling will eventually be built.
  22  */
  23
  24 #include "config.h"
  25 #include <stdlib.h>
  26
  27 #include <fcntl.h>
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <limits.h>
  31 #include <string.h>
  32 #include <unistd.h>
  33
  34 #include "debugger.h"
  35
  36 #define NR_TYPE_HASH 521
  37
  38 int               DEBUG_nchar;
  39 static int        DEBUG_maxchar = 1024;
  40
  41 struct en_values
  42 {
  43   struct en_values* next;
  44   char            * name;
  45   int               value;
  46 };
  47
  48 struct member
  49 {
  50   struct member   * next;
  51   char            * name;
  52   struct datatype * type;
  53   int               offset;
  54   int               size;
  55 };
  56
  57 struct datatype
  58 {
  59   enum  debug_type type;
  60   struct datatype * next;
  61   char * name;
  62   union
  63   {
  64     struct
  65     {
  66       char    basic_type;
  67       char  * output_format;
  68       char    basic_size;
  69       unsigned b_signed:1;
  70     } basic;
  71     struct
  72     {
  73       unsigned short bitoff;
  74       unsigned short nbits;
  75       struct datatype * basetype;
  76     } bitfield;
  77
  78     struct
  79     {
  80       struct datatype * pointsto;
  81     } pointer;
  82     struct
  83     {
  84       struct datatype * rettype;
  85     } funct;
  86     struct
  87     {
  88       int               start;
  89       int               end;
  90       struct datatype * basictype;
  91     } array;
  92     struct
  93     {
  94       int               size;
  95       struct member * members;
  96     } structure;
  97     struct
  98     {
  99       struct en_values * members;
 100     } enumeration;
 101   } un;
 102 };
 103
 104 /*
 105  * All of the types that have been defined so far.
 106  */
 107 static struct datatype * type_hash_table[NR_TYPE_HASH + 1];
 108 static struct datatype * pointer_types = NULL;
 109 static struct datatype * basic_types[DT_BASIC_LAST];
 110
 111 static unsigned int type_hash( const char * name )
 112 {
 113     unsigned int hash = 0;
 114     unsigned int tmp;
 115     const char * p;
 116
 117     p = name;
 118
 119     while (*p)
 120       {
 121         hash = (hash << 4) + *p++;
 122
 123         if( (tmp = (hash & 0xf0000000)) )
 124           {
 125             hash ^= tmp >> 24;
 126           }
 127         hash &= ~tmp;
 128       }
 129     return hash % NR_TYPE_HASH;
 130 }
 131
 132
 133 static struct datatype *
 134 DEBUG_InitBasic(int type, char * name, int size, int b_signed,
 135                             char * output_format)
 136 {
 137   int hash;
 138
 139   struct datatype * dt;
 140   dt = (struct datatype *) DBG_alloc(sizeof(struct datatype));
 141
 142   if( dt != NULL )
 143     {
 144       if( name != NULL )
 145         {
 146           hash = type_hash(name);
 147         }
 148       else
 149         {
 150           hash = NR_TYPE_HASH;
 151         }
 152
 153       dt->type = DT_BASIC;
 154       dt->name = name;
 155       dt->next = type_hash_table[hash];
 156       type_hash_table[hash] = dt;
 157       dt->un.basic.basic_type = type;
 158       dt->un.basic.basic_size = size;
 159       dt->un.basic.b_signed = b_signed;
 160       dt->un.basic.output_format = output_format;
 161       basic_types[type] = dt;
 162     }
 163
 164   return dt;
 165 }
 166
 167 static
 168 struct datatype *
 169 DEBUG_LookupDataType(enum debug_type xtype, int hash, const char * typename)
 170 {
 171   struct datatype * dt = NULL;
 172
 173   if( typename != NULL )
 174     {
 175       for( dt = type_hash_table[hash]; dt; dt = dt->next )
 176         {
 177           if( xtype != dt->type || dt->name == NULL
 178               || dt->name[0] != typename[0])
 179             {
 180               continue;
 181             }
 182
 183           if( strcmp(dt->name, typename) == 0 )
 184             {
 185               return dt;
 186             }
 187         }
 188     }
 189
 190   return dt;
 191 }
 192
 193 struct datatype *
 194 DEBUG_GetBasicType(enum debug_type_basic basic)
 195 {
 196     if (basic == 0 || basic >= DT_BASIC_LAST)
 197     {
 198         return NULL;
 199     }
 200     return basic_types[basic];
 201 }
 202
 203 struct datatype *
 204 DEBUG_NewDataType(enum debug_type xtype, const char * typename)
 205 {
 206   struct datatype * dt = NULL;
 207   int hash;
 208
 209   /*
 210    * The last bucket is special, and is used to hold typeless names.
 211    */
 212   if( typename == NULL )
 213     {
 214       hash = NR_TYPE_HASH;
 215     }
 216   else
 217     {
 218       hash = type_hash(typename);
 219     }
 220
 221   dt = DEBUG_LookupDataType(xtype, hash, typename);
 222
 223   if( dt == NULL )
 224     {
 225       dt = (struct datatype *) DBG_alloc(sizeof(struct datatype));
 226
 227       if( dt != NULL )
 228         {
 229           memset(dt, 0, sizeof(*dt));
 230
 231           dt->type = xtype;
 232           if( typename != NULL )
 233             {
 234               dt->name = DBG_strdup(typename);
 235             }
 236           else
 237             {
 238               dt->name = NULL;
 239             }
 240           if( xtype == DT_POINTER )
 241             {
 242               dt->next = pointer_types;
 243               pointer_types = dt;
 244             }
 245           else
 246             {
 247               dt->next = type_hash_table[hash];
 248               type_hash_table[hash] = dt;
 249             }
 250         }
 251     }
 252
 253   return dt;
 254 }
 255
 256 struct datatype *
 257 DEBUG_FindOrMakePointerType(struct datatype * reftype)
 258 {
 259   struct datatype * dt = NULL;
 260
 261   if( reftype != NULL )
 262     {
 263       for( dt = pointer_types; dt; dt = dt->next )
 264         {
 265           if( dt->type != DT_POINTER )
 266             {
 267               continue;
 268             }
 269
 270           if( dt->un.pointer.pointsto == reftype )
 271             {
 272               return dt;
 273             }
 274         }
 275     }
 276
 277   if( dt == NULL )
 278     {
 279       dt = (struct datatype *) DBG_alloc(sizeof(struct datatype));
 280
 281       if( dt != NULL )
 282         {
 283           dt->type = DT_POINTER;
 284           dt->un.pointer.pointsto = reftype;
 285           dt->next = pointer_types;
 286           pointer_types = dt;
 287         }
 288     }
 289
 290   return dt;
 291 }
 292
 293 void
 294 DEBUG_InitTypes(void)
 295 {
 296   static int beenhere = 0;
 297
 298   if( beenhere++ != 0 )
 299     {
 300       return;
 301     }
 302
 303   /*
 304    * Initialize a few builtin types.
 305    */
 306
 307   DEBUG_InitBasic(DT_BASIC_INT,"int",4,1,"%d");
 308   DEBUG_InitBasic(DT_BASIC_CHAR,"char",1,1,"'%c'");
 309   DEBUG_InitBasic(DT_BASIC_LONGINT,"long int",4,1,"%d");
 310   DEBUG_InitBasic(DT_BASIC_UINT,"unsigned int",4,0,"%d");
 311   DEBUG_InitBasic(DT_BASIC_ULONGINT,"long unsigned int",4,0,"%d");
 312   DEBUG_InitBasic(DT_BASIC_LONGLONGINT,"long long int",8,1,"%ld");
 313   DEBUG_InitBasic(DT_BASIC_ULONGLONGINT,"long long unsigned int",8,0,"%ld");
 314   DEBUG_InitBasic(DT_BASIC_SHORTINT,"short int",2,1,"%d");
 315   DEBUG_InitBasic(DT_BASIC_USHORTINT,"short unsigned int",2,0,"%d");
 316   DEBUG_InitBasic(DT_BASIC_SCHAR,"signed char",1,1,"'%c'");
 317   DEBUG_InitBasic(DT_BASIC_UCHAR,"unsigned char",1,0,"'%c'");
 318   DEBUG_InitBasic(DT_BASIC_FLOAT,"float",4,0,"%f");
 319   DEBUG_InitBasic(DT_BASIC_DOUBLE,"long double",12,0,NULL);
 320   DEBUG_InitBasic(DT_BASIC_LONGDOUBLE,"double",8,0,"%lf");
 321   DEBUG_InitBasic(DT_BASIC_CMPLX_INT,"complex int",8,1,NULL);
 322   DEBUG_InitBasic(DT_BASIC_CMPLX_FLOAT,"complex float",8,0,NULL);
 323   DEBUG_InitBasic(DT_BASIC_CMPLX_DOUBLE,"complex double",16,0,NULL);
 324   DEBUG_InitBasic(DT_BASIC_CMPLX_LONGDOUBLE,"complex long double",24,0,NULL);
 325   DEBUG_InitBasic(DT_BASIC_VOID,"void",0,0,NULL);
 326   DEBUG_InitBasic(DT_BASIC_BOOL1,NULL,1,0,"%B");
 327   DEBUG_InitBasic(DT_BASIC_BOOL2,NULL,2,0,"%B");
 328   DEBUG_InitBasic(DT_BASIC_BOOL4,NULL,4,0,"%B");
 329
 330   basic_types[DT_BASIC_STRING] = DEBUG_NewDataType(DT_POINTER, NULL);
 331   DEBUG_SetPointerType(basic_types[DT_BASIC_STRING], basic_types[DT_BASIC_CHAR]);
 332
 333   /*
 334    * Special version of int used with constants of various kinds.
 335    */
 336   DEBUG_InitBasic(DT_BASIC_CONST_INT,NULL,4,1,"%d");
 337
 338   /*
 339    * Now initialize the builtins for codeview.
 340    */
 341   DEBUG_InitCVDataTypes();
 342
 343   DEBUG_InitBasic(DT_BASIC_CONTEXT,NULL,4,0,"%R");
 344 }
 345
 346 long long int
 347 DEBUG_GetExprValue(const DBG_VALUE* _value, char** format)
 348 {
 349    long long int rtn;
 350    unsigned int rtn2;
 351    struct datatype * type2 = NULL;
 352    struct en_values * e;
 353    char * def_format = "0x%x";
 354    DBG_VALUE value = *_value;
 355
 356    assert(_value->cookie == DV_TARGET || _value->cookie == DV_HOST);
 357
 358    rtn = 0; rtn2 = 0;
 359    /* FIXME? I don't quite get this...
 360     * if this is wrong, value.addr shall be linearized
 361     */
 362    value.addr.seg = 0;
 363    assert(value.type != NULL);
 364
 365    switch (value.type->type) {
 366    case DT_BASIC:
 367
 368       if (value.type->un.basic.basic_size > sizeof(rtn)) {
 369          DEBUG_Printf(DBG_CHN_ERR, "Size too large (%d)\n",
 370                       value.type->un.basic.basic_size);
 371          return 0;
 372       }
 373       /* FIXME: following code implies i386 byte ordering */
 374       if (_value->cookie == DV_TARGET) {
 375          if (!DEBUG_READ_MEM_VERBOSE((void*)value.addr.off, &rtn,
 376                                      value.type->un.basic.basic_size))
 377             return 0;
 378       } else {
 379          memcpy(&rtn, (void*)value.addr.off, value.type->un.basic.basic_size);
 380       }
 381
 382       if (    (value.type->un.basic.b_signed)
 383           && ((value.type->un.basic.basic_size & 3) != 0)
 384           && ((rtn >> (value.type->un.basic.basic_size * 8 - 1)) != 0)) {
 385          rtn = rtn | ((-1) << (value.type->un.basic.basic_size * 8));
 386       }
 387       /* float type has to be promoted as a double */
 388       if (value.type->un.basic.basic_type == DT_BASIC_FLOAT) {
 389          float f;
 390          double d;
 391          memcpy(&f, &rtn, sizeof(f));
 392          d = (double)f;
 393          memcpy(&rtn, &d, sizeof(rtn));
 394       }
 395       if (value.type->un.basic.output_format != NULL) {
 396          def_format = value.type->un.basic.output_format;
 397       }
 398
 399       /*
 400        * Check for single character prints that are out of range.
 401        */
 402       if (   value.type->un.basic.basic_size == 1
 403           && strcmp(def_format, "'%c'") == 0
 404           && ((rtn < 0x20) || (rtn > 0x80))) {
 405          def_format = "%d";
 406       }
 407       break;
 408    case DT_POINTER:
 409       if (_value->cookie == DV_TARGET) {
 410          if (!DEBUG_READ_MEM_VERBOSE((void*)value.addr.off, &rtn2, sizeof(void*)))
 411             return 0;
 412       } else {
 413          rtn2 = *(unsigned int*)(value.addr.off);
 414       }
 415
 416       type2 = value.type->un.pointer.pointsto;
 417
 418       if (!type2) {
 419          def_format = "Internal symbol error: unable to access memory location 0x%08x";
 420          rtn = 0;
 421          break;
 422       }
 423
 424       if (type2->type == DT_BASIC && type2->un.basic.basic_size == 1) {
 425          if (_value->cookie == DV_TARGET) {
 426             char ch;
 427             def_format = "\"%S\"";
 428             /* FIXME: assuming little endian */
 429             if (!DEBUG_READ_MEM_VERBOSE((void*)rtn2, &ch, 1))
 430                return 0;
 431          } else {
 432             def_format = "\"%s\"";
 433          }
 434       } else {
 435          def_format = "0x%8.8x";
 436       }
 437       rtn = rtn2;
 438       break;
 439    case DT_ARRAY:
 440    case DT_STRUCT:
 441       assert(_value->cookie == DV_TARGET);
 442       if (!DEBUG_READ_MEM_VERBOSE((void*)value.addr.off, &rtn2, sizeof(rtn2)))
 443          return 0;
 444       rtn = rtn2;
 445       def_format = "0x%8.8x";
 446       break;
 447    case DT_ENUM:
 448       assert(_value->cookie == DV_TARGET);
 449       if (!DEBUG_READ_MEM_VERBOSE((void*)value.addr.off, &rtn2, sizeof(rtn2)))
 450          return 0;
 451       rtn = rtn2;
 452       def_format = "%d";
 453       for (e = value.type->un.enumeration.members; e; e = e->next) {
 454          if (e->value == rtn) {
 455             rtn = (int)e->name;
 456             def_format = "%s";
 457             break;
 458          }
 459       }
 460       break;
 461    default:
 462       rtn = 0;
 463       break;
 464    }
 465
 466
 467    if (format != NULL) {
 468       *format = def_format;
 469    }
 470    return rtn;
 471 }
 472
 473 unsigned int
 474 DEBUG_TypeDerefPointer(const DBG_VALUE *value, struct datatype ** newtype)
 475 {
 476   DBG_ADDR      addr = value->addr;
 477   unsigned int  val;
 478
 479   assert(value->cookie == DV_TARGET || value->cookie == DV_HOST);
 480
 481   *newtype = NULL;
 482
 483   /*
 484    * Make sure that this really makes sense.
 485    */
 486   if( value->type->type != DT_POINTER )
 487      return 0;
 488
 489   if (value->cookie == DV_TARGET) {
 490      if (!DEBUG_READ_MEM((void*)value->addr.off, &val, sizeof(val)))
 491         return 0;
 492   } else {
 493      val = *(unsigned int*)value->addr.off;
 494   }
 495
 496   *newtype = value->type->un.pointer.pointsto;
 497   addr.off = val;
 498   return DEBUG_ToLinear(&addr); /* FIXME: is this right (or "better") ? */
 499 }
 500
 501 unsigned int
 502 DEBUG_FindStructElement(DBG_VALUE* value, const char * ele_name, int * tmpbuf)
 503 {
 504   struct member * m;
 505   unsigned int    mask;
 506
 507   assert(value->cookie == DV_TARGET || value->cookie == DV_HOST);
 508
 509   /*
 510    * Make sure that this really makes sense.
 511    */
 512   if( value->type->type != DT_STRUCT )
 513     {
 514       value->type = NULL;
 515       return FALSE;
 516     }
 517
 518   for(m = value->type->un.structure.members; m; m = m->next)
 519     {
 520       if( strcmp(m->name, ele_name) == 0 )
 521         {
 522           value->type = m->type;
 523           if( (m->offset & 7) != 0 || (m->size & 7) != 0)
 524             {
 525               /*
 526                * Bitfield operation.  We have to extract the field and store
 527                * it in a temporary buffer so that we get it all right.
 528                */
 529               *tmpbuf = ((*(int* ) (value->addr.off + (m->offset >> 3))) >> (m->offset & 7));
 530               value->addr.off = (int) tmpbuf;
 531
 532               mask = 0xffffffff << (m->size);
 533               *tmpbuf &= ~mask;
 534               /*
 535                * OK, now we have the correct part of the number.
 536                * Check to see whether the basic type is signed or not, and if so,
 537                * we need to sign extend the number.
 538                */
 539               if( m->type->type == DT_BASIC && m->type->un.basic.b_signed != 0
 540                   && (*tmpbuf & (1 << (m->size - 1))) != 0 )
 541                 {
 542                   *tmpbuf |= mask;
 543                 }
 544             }
 545           else
 546             {
 547               value->addr.off += (m->offset >> 3);
 548             }
 549           return TRUE;
 550         }
 551     }
 552
 553   value->type = NULL;
 554   return FALSE;
 555 }
 556
 557 int
 558 DEBUG_SetStructSize(struct datatype * dt, int size)
 559 {
 560   assert(dt->type == DT_STRUCT);
 561
 562   if( dt->un.structure.members != NULL )
 563     {
 564       return FALSE;
 565     }
 566
 567   dt->un.structure.size = size;
 568   dt->un.structure.members = NULL;
 569
 570   return TRUE;
 571 }
 572
 573 int
 574 DEBUG_CopyFieldlist(struct datatype * dt, struct datatype * dt2)
 575 {
 576   if (!(dt->type == dt2->type && ((dt->type == DT_STRUCT) || (dt->type == DT_ENUM)))) {
 577     DEBUG_Printf(DBG_CHN_MESG, "Error: Copyfield list mismatch (%d<>%d): ", dt->type, dt2->type);
 578     DEBUG_PrintTypeCast(dt);
 579     DEBUG_Printf(DBG_CHN_MESG, " ");
 580     DEBUG_PrintTypeCast(dt2);
 581     DEBUG_Printf(DBG_CHN_MESG, "\n");
 582     return FALSE;
 583   }
 584
 585   if( dt->type == DT_STRUCT )
 586     {
 587       dt->un.structure.members = dt2->un.structure.members;
 588     }
 589   else
 590     {
 591       dt->un.enumeration.members = dt2->un.enumeration.members;
 592     }
 593
 594   return TRUE;
 595 }
 596
 597 int
 598 DEBUG_AddStructElement(struct datatype * dt, char * name, struct datatype * type,
 599                        int offset, int size)
 600 {
 601   struct member * m;
 602   struct member * last;
 603   struct en_values * e;
 604
 605   if( dt->type == DT_STRUCT )
 606     {
 607       for(last = dt->un.structure.members; last; last = last->next)
 608         {
 609           if(    (last->name[0] == name[0])
 610               && (strcmp(last->name, name) == 0) )
 611             {
 612               return TRUE;
 613             }
 614           if( last->next == NULL )
 615             {
 616               break;
 617             }
 618         }
 619       m = (struct member *) DBG_alloc(sizeof(struct member));
 620       if( m == FALSE )
 621         {
 622           return FALSE;
 623         }
 624
 625       m->name = DBG_strdup(name);
 626       m->type = type;
 627       m->offset = offset;
 628       m->size = size;
 629       if( last == NULL )
 630         {
 631           m->next = dt->un.structure.members;
 632           dt->un.structure.members = m;
 633         }
 634       else
 635         {
 636           last->next = m;
 637           m->next = NULL;
 638         }
 639       /*
 640        * If the base type is bitfield, then adjust the offsets here so that we
 641        * are able to look things up without lots of falter-all.
 642        */
 643       if( type && type->type == DT_BITFIELD )
 644         {
 645           m->offset += m->type->un.bitfield.bitoff;
 646           m->size = m->type->un.bitfield.nbits;
 647           m->type = m->type->un.bitfield.basetype;
 648         }
 649     }
 650   else if( dt->type == DT_ENUM )
 651     {
 652       e = (struct en_values *) DBG_alloc(sizeof(struct en_values));
 653       if( e == FALSE )
 654         {
 655           return FALSE;
 656         }
 657
 658       e->name = DBG_strdup(name);
 659       e->value = offset;
 660       e->next = dt->un.enumeration.members;
 661       dt->un.enumeration.members = e;
 662     }
 663   else
 664     {
 665       assert(FALSE);
 666     }
 667   return TRUE;
 668 }
 669
 670 struct datatype *
 671 DEBUG_GetPointerType(struct datatype * dt)
 672 {
 673   if( dt->type == DT_POINTER )
 674     {
 675       return dt->un.pointer.pointsto;
 676     }
 677
 678   return NULL;
 679 }
 680
 681 int
 682 DEBUG_SetPointerType(struct datatype * dt, struct datatype * dt2)
 683 {
 684   switch(dt->type)
 685     {
 686     case DT_POINTER:
 687       dt->un.pointer.pointsto = dt2;
 688       break;
 689     case DT_FUNC:
 690       dt->un.funct.rettype = dt2;
 691       break;
 692     default:
 693       assert(FALSE);
 694     }
 695
 696   return TRUE;
 697 }
 698
 699 int
 700 DEBUG_SetArrayParams(struct datatype * dt, int min, int max, struct datatype * dt2)
 701 {
 702   assert(dt->type == DT_ARRAY);
 703   dt->un.array.start = min;
 704   dt->un.array.end   = max;
 705   dt->un.array.basictype = dt2;
 706
 707   return TRUE;
 708 }
 709
 710 int
 711 DEBUG_SetBitfieldParams(struct datatype * dt, int offset, int nbits,
 712                         struct datatype * dt2)
 713 {
 714   assert(dt->type == DT_BITFIELD);
 715   dt->un.bitfield.bitoff   = offset;
 716   dt->un.bitfield.nbits    = nbits;
 717   dt->un.bitfield.basetype = dt2;
 718
 719   return TRUE;
 720 }
 721
 722 int DEBUG_GetObjectSize(struct datatype * dt)
 723 {
 724   if( dt == NULL )
 725     {
 726       return 0;
 727     }
 728
 729   switch(dt->type)
 730     {
 731     case DT_BASIC:
 732       return dt->un.basic.basic_size;
 733     case DT_POINTER:
 734       return sizeof(int *);
 735     case DT_STRUCT:
 736       return dt->un.structure.size;
 737     case DT_ENUM:
 738       return sizeof(int);
 739     case DT_ARRAY:
 740       return (dt->un.array.end - dt->un.array.start)
 741         * DEBUG_GetObjectSize(dt->un.array.basictype);
 742     case DT_BITFIELD:
 743       /*
 744        * Bitfields have to be handled separately later on
 745        * when we insert the element into the structure.
 746        */
 747       return 0;
 748     case DT_FUNC:
 749       assert(FALSE);
 750     default:
 751       DEBUG_Printf(DBG_CHN_ERR, "Unknown type???\n");
 752       break;
 753     }
 754   return 0;
 755 }
 756
 757 unsigned int
 758 DEBUG_ArrayIndex(const DBG_VALUE * value, DBG_VALUE * result, int index)
 759 {
 760   int size;
 761
 762   assert(value->cookie == DV_TARGET || value->cookie == DV_HOST);
 763
 764   /*
 765    * Make sure that this really makes sense.
 766    */
 767   if( value->type->type == DT_POINTER )
 768     {
 769       /*
 770        * Get the base type, so we know how much to index by.
 771        */
 772       size = DEBUG_GetObjectSize(value->type->un.pointer.pointsto);
 773       result->type = value->type->un.pointer.pointsto;
 774       result->addr.off = (DWORD)DEBUG_ReadMemory(value) + size*index;
 775
 776       /* Contents of array must be on same target */
 777       result->cookie = value->cookie;
 778     }
 779   else if (value->type->type == DT_ARRAY)
 780     {
 781       size = DEBUG_GetObjectSize(value->type->un.array.basictype);
 782       result->type = value->type->un.array.basictype;
 783       result->addr.off = value->addr.off + size * (index - value->type->un.array.start);
 784
 785       /* Contents of array must be on same target */
 786       result->cookie = value->cookie;
 787     }
 788   else
 789     {
 790       assert(FALSE);
 791     }
 792
 793   return TRUE;
 794 }
 795
 796 /***********************************************************************
 797  *           DEBUG_Print
 798  *
 799  * Implementation of the 'print' command.
 800  */
 801 void
 802 DEBUG_Print( const DBG_VALUE *value, int count, char format, int level )
 803 {
 804   DBG_VALUE       val1;
 805   int             i;
 806   struct member * m;
 807   char          * pnt;
 808   int             size;
 809   int             xval;
 810
 811   assert(value->cookie == DV_TARGET || value->cookie == DV_HOST);
 812
 813   if (count != 1)
 814     {
 815       DEBUG_Printf( DBG_CHN_MESG, "Count other than 1 is meaningless in 'print' command\n" );
 816       return;
 817     }
 818
 819   if( value->type == NULL )
 820   {
 821       /* No type, just print the addr value */
 822       if (value->addr.seg && (value->addr.seg != 0xffffffff))
 823           DEBUG_nchar += DEBUG_Printf( DBG_CHN_MESG, "0x%04lx: ", value->addr.seg );
 824       DEBUG_nchar += DEBUG_Printf( DBG_CHN_MESG, "0x%08lx", value->addr.off );
 825       goto leave;
 826   }
 827
 828   if( level == 0 )
 829     {
 830       DEBUG_nchar = 0;
 831     }
 832
 833   if( DEBUG_nchar > DEBUG_maxchar )
 834     {
 835       DEBUG_Printf(DBG_CHN_MESG, "...");
 836       goto leave;
 837     }
 838
 839   if( format == 'i' || format == 's' || format == 'w' || format == 'b' || format == 'g')
 840     {
 841       DEBUG_Printf( DBG_CHN_MESG, "Format specifier '%c' is meaningless in 'print' command\n", format );
 842       format = '\0';
 843     }
 844
 845   switch(value->type->type)
 846     {
 847     case DT_BASIC:
 848     case DT_ENUM:
 849     case DT_POINTER:
 850       DEBUG_PrintBasic(value, 1, format);
 851       break;
 852     case DT_STRUCT:
 853       DEBUG_nchar += DEBUG_Printf(DBG_CHN_MESG, "{");
 854       for(m = value->type->un.structure.members; m; m = m->next)
 855         {
 856           val1 = *value;
 857           DEBUG_FindStructElement(&val1, m->name, &xval);
 858           DEBUG_nchar += DEBUG_Printf(DBG_CHN_MESG, "%s=", m->name);
 859           DEBUG_Print(&val1, 1, format, level + 1);
 860           if( m->next != NULL )
 861             {
 862               DEBUG_nchar += DEBUG_Printf(DBG_CHN_MESG, ", ");
 863             }
 864           if( DEBUG_nchar > DEBUG_maxchar )
 865             {
 866               DEBUG_Printf(DBG_CHN_MESG, "...}");
 867               goto leave;
 868             }
 869         }
 870       DEBUG_nchar += DEBUG_Printf(DBG_CHN_MESG, "}");
 871       break;
 872     case DT_ARRAY:
 873       /*
 874        * Loop over all of the entries, printing stuff as we go.
 875        */
 876       size = DEBUG_GetObjectSize(value->type->un.array.basictype);
 877       if( size == 1 )
 878         {
 879           int   len, clen;
 880
 881           /*
 882            * Special handling for character arrays.
 883            */
 884           pnt = (char *) value->addr.off;
 885           len = value->type->un.array.end - value->type->un.array.start + 1;
 886           clen = (DEBUG_nchar + len < DEBUG_maxchar)
 887               ? len : (DEBUG_maxchar - DEBUG_nchar);
 888
 889           DEBUG_nchar += DEBUG_Printf(DBG_CHN_MESG, "\"");
 890           switch (value->cookie)
 891           {
 892           case DV_TARGET:
 893               clen = DEBUG_PrintStringA(DBG_CHN_MESG, &value->addr, clen);
 894               break;
 895           case DV_HOST:
 896               DEBUG_OutputA(DBG_CHN_MESG, pnt, clen);
 897               break;
 898           default: assert(0);
 899           }
 900           DEBUG_nchar += clen;
 901           if (clen != len)
 902           {
 903               DEBUG_Printf(DBG_CHN_MESG, "...\"");
 904               goto leave;
 905           }
 906           DEBUG_nchar += DEBUG_Printf(DBG_CHN_MESG, "\"");
 907           break;
 908         }
 909       val1 = *value;
 910       val1.type = value->type->un.array.basictype;
 911       DEBUG_nchar += DEBUG_Printf(DBG_CHN_MESG, "{");
 912       for( i=value->type->un.array.start; i <= value->type->un.array.end; i++ )
 913         {
 914           DEBUG_Print(&val1, 1, format, level + 1);
 915           val1.addr.off += size;
 916           if( i == value->type->un.array.end )
 917             {
 918               DEBUG_nchar += DEBUG_Printf(DBG_CHN_MESG, "}");
 919             }
 920           else
 921             {
 922               DEBUG_nchar += DEBUG_Printf(DBG_CHN_MESG, ", ");
 923             }
 924           if( DEBUG_nchar > DEBUG_maxchar )
 925             {
 926               DEBUG_Printf(DBG_CHN_MESG, "...}");
 927               goto leave;
 928             }
 929         }
 930       break;
 931     case DT_FUNC:
 932       DEBUG_Printf(DBG_CHN_MESG, "Function at ???\n");
 933       break;
 934     default:
 935       DEBUG_Printf(DBG_CHN_MESG, "Unknown type (%d)\n", value->type->type);
 936       assert(FALSE);
 937       break;
 938     }
 939
 940 leave:
 941
 942   if( level == 0 )
 943     {
 944       DEBUG_nchar += DEBUG_Printf(DBG_CHN_MESG, "\n");
 945     }
 946   return;
 947 }
 948
 949 int
 950 DEBUG_DumpTypes(void)
 951 {
 952   struct datatype * dt = NULL;
 953   struct member * m;
 954   int hash;
 955   int nm;
 956   char * name;
 957   char * member_name;
 958
 959   for(hash = 0; hash < NR_TYPE_HASH + 1; hash++)
 960     {
 961       for( dt = type_hash_table[hash]; dt; dt = dt->next )
 962         {
 963           name =  "none";
 964           if( dt->name != NULL )
 965             {
 966               name = dt->name;
 967             }
 968           switch(dt->type)
 969             {
 970             case DT_BASIC:
 971               DEBUG_Printf(DBG_CHN_MESG, "0x%08lx - BASIC(%s)\n",
 972                            (unsigned long)dt, name);
 973               break;
 974             case DT_POINTER:
 975               DEBUG_Printf(DBG_CHN_MESG, "0x%08lx - POINTER(%s)(%08lx)\n",
 976                            (unsigned long)dt, name, (unsigned long)dt->un.pointer.pointsto);
 977               break;
 978             case DT_STRUCT:
 979               member_name = "none";
 980               nm = 0;
 981               if( dt->un.structure.members != NULL
 982                   && dt->un.structure.members->name != NULL )
 983                 {
 984                   member_name = dt->un.structure.members->name;
 985                   for( m = dt->un.structure.members; m; m = m->next)
 986                     {
 987                       nm++;
 988                     }
 989                 }
 990               DEBUG_Printf(DBG_CHN_MESG, "0x%08lx - STRUCT(%s) %d %d %s\n",
 991                            (unsigned long)dt, name, dt->un.structure.size, nm, member_name);
 992               break;
 993             case DT_ARRAY:
 994               DEBUG_Printf(DBG_CHN_MESG, "0x%08lx - ARRAY(%s)(%08lx)\n",
 995                            (unsigned long)dt, name, (unsigned long)dt->un.array.basictype);
 996               break;
 997             case DT_ENUM:
 998               DEBUG_Printf(DBG_CHN_MESG, "0x%08lx - ENUM(%s)\n",
 999                            (unsigned long)dt, name);
1000               break;
1001             case DT_BITFIELD:
1002               DEBUG_Printf(DBG_CHN_MESG, "0x%08lx - BITFIELD(%s)\n",
1003                            (unsigned long)dt, name);
1004               break;
1005             case DT_FUNC:
1006               DEBUG_Printf(DBG_CHN_MESG, "0x%08lx - FUNC(%s)(%08lx)\n",
1007                            (unsigned long)dt, name, (unsigned long)dt->un.funct.rettype);
1008               break;
1009             default:
1010               DEBUG_Printf(DBG_CHN_ERR, "Unknown type???\n");
1011               break;
1012             }
1013         }
1014     }
1015   return TRUE;
1016 }
1017
1018
1019 enum debug_type DEBUG_GetType(struct datatype * dt)
1020 {
1021   return dt->type;
1022 }
1023
1024 struct datatype *
1025 DEBUG_TypeCast(enum debug_type type, const char * name)
1026 {
1027   int                     hash;
1028
1029   /*
1030    * The last bucket is special, and is used to hold typeless names.
1031    */
1032   if( name == NULL )
1033     {
1034       hash = NR_TYPE_HASH;
1035     }
1036   else
1037     {
1038       hash = type_hash(name);
1039     }
1040
1041   return DEBUG_LookupDataType(type, hash, name);
1042 }
1043
1044 int
1045 DEBUG_PrintTypeCast(const struct datatype * dt)
1046 {
1047   const char* name = "none";
1048
1049   if(dt == NULL)
1050     {
1051       DEBUG_Printf(DBG_CHN_MESG, "--invalid--");
1052       return FALSE;
1053     }
1054
1055   if( dt->name != NULL )
1056     {
1057       name = dt->name;
1058     }
1059
1060   switch(dt->type)
1061     {
1062     case DT_BASIC:
1063       DEBUG_Printf(DBG_CHN_MESG, "%s", name);
1064       break;
1065     case DT_POINTER:
1066       DEBUG_PrintTypeCast(dt->un.pointer.pointsto);
1067       DEBUG_Printf(DBG_CHN_MESG, "*");
1068       break;
1069     case DT_STRUCT:
1070       DEBUG_Printf(DBG_CHN_MESG, "struct %s", name);
1071       break;
1072     case DT_ARRAY:
1073       DEBUG_Printf(DBG_CHN_MESG, "%s[]", name);
1074       break;
1075     case DT_ENUM:
1076       DEBUG_Printf(DBG_CHN_MESG, "enum %s", name);
1077       break;
1078     case DT_BITFIELD:
1079       DEBUG_Printf(DBG_CHN_MESG, "unsigned %s", name);
1080       break;
1081     case DT_FUNC:
1082       DEBUG_PrintTypeCast(dt->un.funct.rettype);
1083       DEBUG_Printf(DBG_CHN_MESG, "(*%s)()", name);
1084       break;
1085     default:
1086        DEBUG_Printf(DBG_CHN_ERR, "Unknown type???\n");
1087        break;
1088     }
1089
1090   return TRUE;
1091 }
1092
1093 int DEBUG_PrintType( const DBG_VALUE *value )
1094 {
1095    assert(value->cookie == DV_TARGET || value->cookie == DV_HOST);
1096
1097    if (!value->type)
1098    {
1099       DEBUG_Printf(DBG_CHN_MESG, "Unknown type\n");
1100       return FALSE;
1101    }
1102    if (!DEBUG_PrintTypeCast(value->type))
1103       return FALSE;
1104    DEBUG_Printf(DBG_CHN_MESG, "\n");
1105    return TRUE;
1106 }