programs/winedbg/memory.c

   1 /*
   2  * Debugger memory handling
   3  *
   4  * Copyright 1993 Eric Youngdale
   5  * Copyright 1995 Alexandre Julliard
   6  * Copyright 2000-2005 Eric Pouech
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 #include "config.h"
  24 #include "wine/port.h"
  25
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <stdio.h>
  29
  30 #include "debugger.h"
  31 #include "wine/debug.h"
  32
  33 WINE_DEFAULT_DEBUG_CHANNEL(winedbg);
  34
  35 void* be_cpu_linearize(HANDLE hThread, const ADDRESS64* addr)
  36 {
  37     assert(addr->Mode == AddrModeFlat);
  38     return (void*)(DWORD_PTR)addr->Offset;
  39 }
  40
  41 unsigned be_cpu_build_addr(HANDLE hThread, const CONTEXT* ctx, ADDRESS64* addr,
  42                            unsigned seg, unsigned long offset)
  43 {
  44     addr->Mode    = AddrModeFlat;
  45     addr->Segment = 0; /* don't need segment */
  46     addr->Offset  = offset;
  47     return TRUE;
  48 }
  49
  50 void* memory_to_linear_addr(const ADDRESS64* addr)
  51 {
  52     return be_cpu->linearize(dbg_curr_thread->handle, addr);
  53 }
  54
  55 BOOL memory_get_current_pc(ADDRESS64* addr)
  56 {
  57     assert(be_cpu->get_addr);
  58     return be_cpu->get_addr(dbg_curr_thread->handle, &dbg_context,
  59                             be_cpu_addr_pc, addr);
  60 }
  61
  62 BOOL memory_get_current_stack(ADDRESS64* addr)
  63 {
  64     assert(be_cpu->get_addr);
  65     return be_cpu->get_addr(dbg_curr_thread->handle, &dbg_context,
  66                             be_cpu_addr_stack, addr);
  67 }
  68
  69 BOOL memory_get_current_frame(ADDRESS64* addr)
  70 {
  71     assert(be_cpu->get_addr);
  72     return be_cpu->get_addr(dbg_curr_thread->handle, &dbg_context,
  73                             be_cpu_addr_frame, addr);
  74 }
  75
  76 static void     memory_report_invalid_addr(const void* addr)
  77 {
  78     ADDRESS64   address;
  79
  80     address.Mode    = AddrModeFlat;
  81     address.Segment = 0;
  82     address.Offset  = (unsigned long)addr;
  83     dbg_printf("*** Invalid address ");
  84     print_address(&address, FALSE);
  85     dbg_printf(" ***\n");
  86 }
  87
  88 /***********************************************************************
  89  *           memory_read_value
  90  *
  91  * Read a memory value.
  92  */
  93 BOOL memory_read_value(const struct dbg_lvalue* lvalue, DWORD size, void* result)
  94 {
  95     BOOL ret = FALSE;
  96
  97     if (lvalue->cookie == DLV_TARGET)
  98     {
  99         void*   linear = memory_to_linear_addr(&lvalue->addr);
 100         if (!(ret = dbg_read_memory(linear, result, size)))
 101             memory_report_invalid_addr(linear);
 102     }
 103     else
 104     {
 105         if (lvalue->addr.Offset)
 106         {
 107             memcpy(result, (void*)(DWORD_PTR)lvalue->addr.Offset, size);
 108             ret = TRUE;
 109         }
 110     }
 111     return ret;
 112 }
 113
 114 /***********************************************************************
 115  *           memory_write_value
 116  *
 117  * Store a value in memory.
 118  */
 119 BOOL memory_write_value(const struct dbg_lvalue* lvalue, DWORD size, void* value)
 120 {
 121     BOOL        ret = TRUE;
 122     DWORD64     os;
 123
 124     if (!types_get_info(&lvalue->type, TI_GET_LENGTH, &os)) return FALSE;
 125     if (size != os)
 126     {
 127         dbg_printf("Size mismatch in memory_write_value, got %u from type while expecting %u\n",
 128                    (DWORD)os, size);
 129         return FALSE;
 130     }
 131
 132     /* FIXME: only works on little endian systems */
 133     if (lvalue->cookie == DLV_TARGET)
 134     {
 135         void*       linear = memory_to_linear_addr(&lvalue->addr);
 136         if (!(ret = dbg_write_memory(linear, value, size)))
 137             memory_report_invalid_addr(linear);
 138     }
 139     else
 140     {
 141         memcpy((void*)(DWORD_PTR)lvalue->addr.Offset, value, size);
 142     }
 143     return ret;
 144 }
 145
 146 /***********************************************************************
 147  *           memory_examine
 148  *
 149  * Implementation of the 'x' command.
 150  */
 151 void memory_examine(const struct dbg_lvalue *lvalue, int count, char format)
 152 {
 153     int                 i;
 154     char                buffer[256];
 155     ADDRESS64           addr;
 156     void               *linear;
 157
 158     types_extract_as_address(lvalue, &addr);
 159     linear = memory_to_linear_addr(&addr);
 160
 161     if (format != 'i' && count > 1)
 162     {
 163         print_address(&addr, FALSE);
 164         dbg_printf(": ");
 165     }
 166
 167     switch (format)
 168     {
 169     case 'u':
 170         if (count == 1) count = 256;
 171         memory_get_string(dbg_curr_process, linear,
 172                           TRUE, TRUE, buffer, min(count, sizeof(buffer)));
 173         dbg_printf("%s\n", buffer);
 174         return;
 175     case 's':
 176         if (count == 1) count = 256;
 177         memory_get_string(dbg_curr_process, linear,
 178                           TRUE, FALSE, buffer, min(count, sizeof(buffer)));
 179         dbg_printf("%s\n", buffer);
 180         return;
 181     case 'i':
 182         while (count-- && memory_disasm_one_insn(&addr));
 183         return;
 184     case 'g':
 185         while (count--)
 186         {
 187             GUID guid;
 188             if (!dbg_read_memory(linear, &guid, sizeof(guid)))
 189             {
 190                 memory_report_invalid_addr(linear);
 191                 break;
 192             }
 193             dbg_printf("{%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x}\n",
 194                        guid.Data1, guid.Data2, guid.Data3,
 195                        guid.Data4[0], guid.Data4[1], guid.Data4[2], guid.Data4[3],
 196                        guid.Data4[4], guid.Data4[5], guid.Data4[6], guid.Data4[7]);
 197             linear = (char*)linear + sizeof(guid);
 198             addr.Offset += sizeof(guid);
 199             if (count)
 200             {
 201                 print_address(&addr, FALSE);
 202                 dbg_printf(": ");
 203             }
 204         }
 205         return;
 206
 207 #define DO_DUMP2(_t,_l,_f,_vv) {                                        \
 208             _t _v;                                                      \
 209             for (i = 0; i < count; i++) {                               \
 210                 if (!dbg_read_memory(linear, &_v, sizeof(_t)))          \
 211                 { memory_report_invalid_addr(linear); break; }          \
 212                 dbg_printf(_f, (_vv));                                  \
 213                 addr.Offset += sizeof(_t);                              \
 214                 linear = (char*)linear + sizeof(_t);                    \
 215                 if ((i % (_l)) == (_l) - 1 && i != count - 1)           \
 216                 {                                                       \
 217                     dbg_printf("\n");                                   \
 218                     print_address(&addr, FALSE);                        \
 219                     dbg_printf(": ");                                   \
 220                 }                                                       \
 221             }                                                           \
 222             dbg_printf("\n");                                           \
 223         }
 224 #define DO_DUMP(_t,_l,_f) DO_DUMP2(_t,_l,_f,_v)
 225
 226     case 'x': DO_DUMP(int, 4, " %8.8x"); break;
 227     case 'd': DO_DUMP(unsigned int, 4, " %4.4d"); break;
 228     case 'w': DO_DUMP(unsigned short, 8, " %04x"); break;
 229     case 'a':
 230         if (sizeof(DWORD_PTR) == 4)
 231         {
 232             DO_DUMP(DWORD_PTR, 4, " %8.8lx");
 233         }
 234         else
 235         {
 236             DO_DUMP(DWORD_PTR, 2, " %16.16lx");
 237         }
 238         break;
 239     case 'c': DO_DUMP2(char, 32, " %c", (_v < 0x20) ? ' ' : _v); break;
 240     case 'b': DO_DUMP2(char, 16, " %02x", (_v) & 0xff); break;
 241     }
 242 }
 243
 244 BOOL memory_get_string(struct dbg_process* pcs, void* addr, BOOL in_debuggee,
 245                        BOOL unicode, char* buffer, int size)
 246 {
 247     SIZE_T      sz;
 248     WCHAR*      buffW;
 249
 250     buffer[0] = 0;
 251     if (!addr) return FALSE;
 252     if (in_debuggee)
 253     {
 254         BOOL ret;
 255
 256         if (!unicode) ret = pcs->process_io->read(pcs->handle, addr, buffer, size, &sz);
 257         else
 258         {
 259             buffW = HeapAlloc(GetProcessHeap(), 0, size * sizeof(WCHAR));
 260             ret = pcs->process_io->read(pcs->handle, addr, buffW, size * sizeof(WCHAR), &sz);
 261             WideCharToMultiByte(CP_ACP, 0, buffW, sz / sizeof(WCHAR), buffer, size,
 262                                 NULL, NULL);
 263             HeapFree(GetProcessHeap(), 0, buffW);
 264         }
 265         if (size) buffer[size-1] = 0;
 266         return ret;
 267     }
 268     else
 269     {
 270         lstrcpynA(buffer, addr, size);
 271     }
 272     return TRUE;
 273 }
 274
 275 BOOL memory_get_string_indirect(struct dbg_process* pcs, void* addr, BOOL unicode, WCHAR* buffer, int size)
 276 {
 277     void*       ad;
 278     SIZE_T      sz;
 279
 280     buffer[0] = 0;
 281     if (addr &&
 282         pcs->process_io->read(pcs->handle, addr, &ad, sizeof(ad), &sz) && sz == sizeof(ad) && ad)
 283     {
 284         LPSTR buff;
 285         BOOL ret;
 286
 287         if (unicode)
 288             ret = pcs->process_io->read(pcs->handle, ad, buffer, size * sizeof(WCHAR), &sz) && sz != 0;
 289         else
 290         {
 291             if ((buff = HeapAlloc(GetProcessHeap(), 0, size)))
 292             {
 293                 ret = pcs->process_io->read(pcs->handle, ad, buff, size, &sz) && sz != 0;
 294                 MultiByteToWideChar(CP_ACP, 0, buff, sz, buffer, size);
 295                 HeapFree(GetProcessHeap(), 0, buff);
 296             }
 297             else ret = FALSE;
 298         }
 299         if (size) buffer[size-1] = 0;
 300         return ret;
 301     }
 302     return FALSE;
 303 }
 304
 305 /*
 306  * Convert an address offset to hex string. If mode == 32, treat offset as
 307  * 32 bits (discard upper 32 bits), if mode == 64 use all 64 bits, if mode == 0
 308  * treat as either 32 or 64 bits, depending on whether we're running as
 309  * Wine32 or Wine64.
 310  */
 311 char* memory_offset_to_string(char *str, DWORD64 offset, unsigned mode)
 312 {
 313     if (mode != 32 && mode != 64)
 314     {
 315 #ifdef _WIN64
 316         mode = 64;
 317 #else
 318         mode = 32;
 319 #endif
 320     }
 321
 322     if (mode == 32)
 323         sprintf(str, "0x%08x", (unsigned int) offset);
 324     else
 325         sprintf(str, "0x%08x%08x", (unsigned int)(offset >> 32),
 326                 (unsigned int)offset);
 327
 328     return str;
 329 }
 330
 331 static void dbg_print_longlong(LONGLONG sv, BOOL is_signed)
 332 {
 333     char      tmp[24], *ptr = tmp + sizeof(tmp) - 1;
 334     ULONGLONG uv, div;
 335     *ptr = '\0';
 336     if (is_signed && sv < 0)    uv = -sv;
 337     else                        { uv = sv; is_signed = FALSE; }
 338     for (div = 10; uv; div *= 10, uv /= 10)
 339         *--ptr = '0' + (uv % 10);
 340     if (ptr == tmp + sizeof(tmp) - 1) *--ptr = '0';
 341     if (is_signed) *--ptr = '-';
 342     dbg_printf("%s", ptr);
 343 }
 344
 345 static void dbg_print_hex(ULONGLONG sv)
 346 {
 347     if (!sv)
 348     {
 349         dbg_printf("0");
 350         return;
 351     }
 352
 353     if (sv >> 32)
 354         dbg_printf("0x%lx%08lx", (unsigned long)(sv >> 32), (unsigned long)sv);
 355     else
 356         dbg_printf("0x%04lx", (unsigned long)sv);
 357 }
 358
 359 static void print_typed_basic(const struct dbg_lvalue* lvalue)
 360 {
 361     LONGLONG            val_int;
 362     void*               val_ptr;
 363     long double         val_real;
 364     DWORD64             size64;
 365     DWORD               tag, size, count, bt;
 366     struct dbg_type     type = lvalue->type;
 367     struct dbg_type     sub_type;
 368     struct dbg_lvalue   sub_lvalue;
 369
 370     if (!types_get_real_type(&type, &tag)) return;
 371
 372     switch (tag)
 373     {
 374     case SymTagBaseType:
 375         if (!types_get_info(&type, TI_GET_LENGTH, &size64) ||
 376             !types_get_info(&type, TI_GET_BASETYPE, &bt))
 377         {
 378             WINE_ERR("Couldn't get information\n");
 379             RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
 380         }
 381         size = (DWORD)size64;
 382         switch (bt)
 383         {
 384         case btInt:
 385         case btLong:
 386             if (!be_cpu->fetch_integer(lvalue, size, TRUE, &val_int)) return;
 387             if (size == 1) goto print_char;
 388             dbg_print_hex(val_int);
 389             break;
 390         case btUInt:
 391         case btULong:
 392             if (!be_cpu->fetch_integer(lvalue, size, FALSE, &val_int)) return;
 393             dbg_print_hex(val_int);
 394             break;
 395         case btFloat:
 396             if (!be_cpu->fetch_float(lvalue, size, &val_real)) return;
 397             dbg_printf("%Lf", val_real);
 398             break;
 399         case btChar:
 400             if (!be_cpu->fetch_integer(lvalue, size, TRUE, &val_int)) return;
 401             /* FIXME: should do the same for a Unicode character (size == 2) */
 402         print_char:
 403             if (size == 1 && (val_int < 0x20 || val_int > 0x80))
 404                 dbg_printf("%d", (int)val_int);
 405             else if (size == 2)
 406             {
 407                 WCHAR   wch = (WCHAR)val_int;
 408                 dbg_outputW(&wch, 1);
 409             }
 410             else
 411                 dbg_printf("'%c'", (char)val_int);
 412             break;
 413         case btBool:
 414             if (!be_cpu->fetch_integer(lvalue, size, TRUE, &val_int)) return;
 415             dbg_printf("%s", val_int ? "true" : "false");
 416             break;
 417         default:
 418             WINE_FIXME("Unsupported basetype %u\n", bt);
 419             break;
 420         }
 421         break;
 422     case SymTagPointerType:
 423         if (!types_array_index(lvalue, 0, &sub_lvalue))
 424         {
 425             dbg_printf("Internal symbol error: unable to access memory location %p",
 426                        memory_to_linear_addr(&lvalue->addr));
 427             break;
 428         }
 429         val_ptr = memory_to_linear_addr(&sub_lvalue.addr);
 430         if (types_get_real_type(&sub_lvalue.type, &tag) && tag == SymTagBaseType &&
 431             types_get_info(&sub_lvalue.type, TI_GET_BASETYPE, &bt) &&
 432             types_get_info(&sub_lvalue.type, TI_GET_LENGTH, &size64))
 433         {
 434             char    buffer[1024];
 435
 436             if (!val_ptr) dbg_printf("0x0");
 437             else if (((bt == btChar || bt == btInt) && size64 == 1) || (bt == btUInt && size64 == 2))
 438             {
 439                 if (memory_get_string(dbg_curr_process, val_ptr, sub_lvalue.cookie == DLV_TARGET,
 440                                       size64 == 2, buffer, sizeof(buffer)))
 441                     dbg_printf("\"%s\"", buffer);
 442                 else
 443                     dbg_printf("*** invalid address %p ***", val_ptr);
 444                 break;
 445             }
 446         }
 447         dbg_printf("%p", val_ptr);
 448         break;
 449     case SymTagArrayType:
 450     case SymTagUDT:
 451         if (!memory_read_value(lvalue, sizeof(val_ptr), &val_ptr)) return;
 452         dbg_printf("%p", val_ptr);
 453         break;
 454     case SymTagEnum:
 455         {
 456             BOOL        ok = FALSE;
 457
 458             /* FIXME: it depends on underlying type for enums
 459              * (not supported yet in dbghelp)
 460              * Assuming 4 as for an int
 461              */
 462             if (!be_cpu->fetch_integer(lvalue, 4, TRUE, &val_int)) return;
 463
 464             if (types_get_info(&type, TI_GET_CHILDRENCOUNT, &count))
 465             {
 466                 char                    buffer[sizeof(TI_FINDCHILDREN_PARAMS) + 256 * sizeof(DWORD)];
 467                 TI_FINDCHILDREN_PARAMS* fcp = (TI_FINDCHILDREN_PARAMS*)buffer;
 468                 WCHAR*                  ptr;
 469                 char                    tmp[256];
 470                 VARIANT                 variant;
 471                 int                     i;
 472
 473                 fcp->Start = 0;
 474                 while (count)
 475                 {
 476                     fcp->Count = min(count, 256);
 477                     if (types_get_info(&type, TI_FINDCHILDREN, fcp))
 478                     {
 479                         sub_type.module = type.module;
 480                         for (i = 0; i < min(fcp->Count, count); i++)
 481                         {
 482                             sub_type.id = fcp->ChildId[i];
 483                             if (!types_get_info(&sub_type, TI_GET_VALUE, &variant))
 484                                 continue;
 485                             switch (variant.n1.n2.vt)
 486                             {
 487                             case VT_I4: ok = (val_int == variant.n1.n2.n3.lVal); break;
 488                             default: WINE_FIXME("Unsupported variant type (%u)\n", variant.n1.n2.vt);
 489                             }
 490                             if (ok)
 491                             {
 492                                 ptr = NULL;
 493                                 types_get_info(&sub_type, TI_GET_SYMNAME, &ptr);
 494                                 if (!ptr) continue;
 495                                 WideCharToMultiByte(CP_ACP, 0, ptr, -1, tmp, sizeof(tmp), NULL, NULL);
 496                                 HeapFree(GetProcessHeap(), 0, ptr);
 497                                 dbg_printf("%s", tmp);
 498                                 count = 0; /* so that we'll get away from outter loop */
 499                                 break;
 500                             }
 501                         }
 502                     }
 503                     count -= min(count, 256);
 504                     fcp->Start += 256;
 505                 }
 506             }
 507             if (!ok) dbg_print_longlong(val_int, TRUE);
 508         }
 509         break;
 510     default:
 511         WINE_FIXME("Unsupported tag %u\n", tag);
 512         break;
 513     }
 514 }
 515
 516 /***********************************************************************
 517  *           print_basic
 518  *
 519  * Implementation of the 'print' command.
 520  */
 521 void print_basic(const struct dbg_lvalue* lvalue, char format)
 522 {
 523     if (lvalue->type.id == dbg_itype_none)
 524     {
 525         dbg_printf("Unable to evaluate expression\n");
 526         return;
 527     }
 528
 529     if (format != 0)
 530     {
 531         unsigned size;
 532         LONGLONG res = types_extract_as_longlong(lvalue, &size);
 533         DWORD hi;
 534         WCHAR wch;
 535
 536         /* FIXME: this implies i386 byte ordering */
 537         switch (format)
 538         {
 539         case 'x':
 540             hi = (ULONG64)res >> 32;
 541             if (size == 8 && hi)
 542                 dbg_printf("0x%x%08x", hi, (DWORD)res);
 543             else
 544                 dbg_printf("0x%x", (DWORD)res);
 545             return;
 546
 547         case 'd':
 548             dbg_print_longlong(res, TRUE);
 549             dbg_printf("\n");
 550             return;
 551
 552         case 'c':
 553             dbg_printf("%d = '%c'", (char)(res & 0xff), (char)(res & 0xff));
 554             return;
 555
 556         case 'u':
 557             wch = (WCHAR)(res & 0xFFFF);
 558             dbg_printf("%d = '", wch);
 559             dbg_outputW(&wch, 1);
 560             dbg_printf("'");
 561             return;
 562
 563         case 'i':
 564         case 's':
 565         case 'w':
 566         case 'b':
 567             dbg_printf("Format specifier '%c' is meaningless in 'print' command\n", format);
 568         }
 569     }
 570     if (lvalue->type.id == dbg_itype_segptr)
 571     {
 572         dbg_print_longlong(types_extract_as_longlong(lvalue, NULL), TRUE);
 573         dbg_printf("\n");
 574     }
 575     else print_typed_basic(lvalue);
 576 }
 577
 578 void print_bare_address(const ADDRESS64* addr)
 579 {
 580     char hexbuf[MAX_OFFSET_TO_STR_LEN];
 581
 582     switch (addr->Mode)
 583     {
 584     case AddrModeFlat:
 585         dbg_printf("%s", memory_offset_to_string(hexbuf, addr->Offset, 0));
 586         break;
 587     case AddrModeReal:
 588     case AddrMode1616:
 589         dbg_printf("0x%04x:0x%04x", addr->Segment, (unsigned) addr->Offset);
 590         break;
 591     case AddrMode1632:
 592         dbg_printf("0x%04x:%s", addr->Segment,
 593                    memory_offset_to_string(hexbuf, addr->Offset, 32));
 594         break;
 595     default:
 596         dbg_printf("Unknown mode %x\n", addr->Mode);
 597         break;
 598     }
 599 }
 600
 601 /***********************************************************************
 602  *           print_address
 603  *
 604  * Print an 16- or 32-bit address, with the nearest symbol if any.
 605  */
 606 void print_address(const ADDRESS64* addr, BOOLEAN with_line)
 607 {
 608     char                buffer[sizeof(SYMBOL_INFO) + 256];
 609     SYMBOL_INFO*        si = (SYMBOL_INFO*)buffer;
 610     void*               lin = memory_to_linear_addr(addr);
 611     DWORD64             disp64;
 612     DWORD               disp;
 613
 614     print_bare_address(addr);
 615
 616     si->SizeOfStruct = sizeof(*si);
 617     si->MaxNameLen   = 256;
 618     if (!SymFromAddr(dbg_curr_process->handle, (DWORD_PTR)lin, &disp64, si)) return;
 619     dbg_printf(" %s", si->Name);
 620     if (disp64) dbg_printf("+0x%lx", (DWORD_PTR)disp64);
 621     if (with_line)
 622     {
 623         IMAGEHLP_LINE64             il;
 624         IMAGEHLP_MODULE             im;
 625
 626         il.SizeOfStruct = sizeof(il);
 627         if (SymGetLineFromAddr64(dbg_curr_process->handle, (DWORD_PTR)lin, &disp, &il))
 628             dbg_printf(" [%s:%u]", il.FileName, il.LineNumber);
 629         im.SizeOfStruct = sizeof(im);
 630         if (SymGetModuleInfo(dbg_curr_process->handle, (DWORD_PTR)lin, &im))
 631             dbg_printf(" in %s", im.ModuleName);
 632     }
 633 }
 634
 635 BOOL memory_disasm_one_insn(ADDRESS64* addr)
 636 {
 637     char        ch;
 638
 639     print_address(addr, TRUE);
 640     dbg_printf(": ");
 641     if (!dbg_read_memory(memory_to_linear_addr(addr), &ch, sizeof(ch)))
 642     {
 643         dbg_printf("-- no code accessible --\n");
 644         return FALSE;
 645     }
 646     be_cpu->disasm_one_insn(addr, TRUE);
 647     dbg_printf("\n");
 648     return TRUE;
 649 }
 650
 651 void memory_disassemble(const struct dbg_lvalue* xstart,
 652                         const struct dbg_lvalue* xend, int instruction_count)
 653 {
 654     static ADDRESS64 last = {0,0,0};
 655     int stop = 0;
 656     int i;
 657
 658     if (!xstart && !xend)
 659     {
 660         if (!last.Segment && !last.Offset) memory_get_current_pc(&last);
 661     }
 662     else
 663     {
 664         if (xstart)
 665             types_extract_as_address(xstart, &last);
 666         if (xend)
 667             stop = types_extract_as_integer(xend);
 668     }
 669     for (i = 0; (instruction_count == 0 || i < instruction_count)  &&
 670                 (stop == 0 || last.Offset <= stop); i++)
 671         memory_disasm_one_insn(&last);
 672 }
 673
 674 BOOL memory_get_register(DWORD regno, DWORD_PTR** value, char* buffer, int len)
 675 {
 676     const struct dbg_internal_var*  div;
 677
 678     /* negative register values are wine's dbghelp hacks
 679      * see dlls/dbghelp/dbghelp_internal.h for the details
 680      */
 681     switch (regno)
 682     {
 683     case -1:
 684         if (buffer) snprintf(buffer, len, "<internal error>");
 685         return FALSE;
 686     case -2:
 687         if (buffer) snprintf(buffer, len, "<couldn't compute location>");
 688         return FALSE;
 689     case -3:
 690         if (buffer) snprintf(buffer, len, "<is not available>");
 691         return FALSE;
 692     case -4:
 693         if (buffer) snprintf(buffer, len, "<couldn't read memory>");
 694         return FALSE;
 695     }
 696
 697     for (div = be_cpu->context_vars; div->name; div++)
 698     {
 699         if (div->val == regno)
 700         {
 701             if (!stack_get_register_frame(div, value))
 702             {
 703                 if (buffer) snprintf(buffer, len, "<register %s not accessible in this frame>", div->name);
 704                 return FALSE;
 705             }
 706
 707             if (buffer) lstrcpynA(buffer, div->name, len);
 708             return TRUE;
 709         }
 710     }
 711     if (buffer) snprintf(buffer, len, "<unknown register %u>", regno);
 712     return FALSE;
 713 }