msdos/dpmi.c

   1 /*
   2  * DPMI 0.9 emulation
   3  *
   4  * Copyright 1995 Alexandre Julliard
   5  */
   6
   7 #include <unistd.h>
   8 #include <string.h>
   9 #include "windows.h"
  10 #include "heap.h"
  11 #include "global.h"
  12 #include "ldt.h"
  13 #include "module.h"
  14 #include "miscemu.h"
  15 #include "drive.h"
  16 #include "msdos.h"
  17 #include "task.h"
  18 #include "dosexe.h"
  19 #include "toolhelp.h"
  20 #include "debug.h"
  21 #include "selectors.h"
  22 #include "thread.h"
  23 #include "process.h"
  24 #include "stackframe.h"
  25 #include "callback.h"
  26
  27 #define DOS_GET_DRIVE(reg) ((reg) ? (reg) - 1 : DRIVE_GetCurrentDrive())
  28
  29 void CreateBPB(int drive, BYTE *data, BOOL16 limited);  /* defined in int21.c */
  30
  31 static void* lastvalloced = NULL;
  32
  33 /* Structure for real-mode callbacks */
  34 typedef struct
  35 {
  36     DWORD edi;
  37     DWORD esi;
  38     DWORD ebp;
  39     DWORD reserved;
  40     DWORD ebx;
  41     DWORD edx;
  42     DWORD ecx;
  43     DWORD eax;
  44     WORD  fl;
  45     WORD  es;
  46     WORD  ds;
  47     WORD  fs;
  48     WORD  gs;
  49     WORD  ip;
  50     WORD  cs;
  51     WORD  sp;
  52     WORD  ss;
  53 } REALMODECALL;
  54
  55
  56
  57 typedef struct tagRMCB {
  58     DWORD address;
  59     struct tagRMCB *next;
  60
  61 } RMCB;
  62
  63 static RMCB *FirstRMCB = NULL;
  64
  65 /**********************************************************************
  66  *          DPMI_xalloc
  67  * special virtualalloc, allocates lineary monoton growing memory.
  68  * (the usual VirtualAlloc does not satisfy that restriction)
  69  */
  70 static LPVOID
  71 DPMI_xalloc(int len) {
  72         LPVOID  ret;
  73         LPVOID  oldlastv = lastvalloced;
  74
  75         if (lastvalloced) {
  76                 int     xflag = 0;
  77                 ret = NULL;
  78                 while (!ret) {
  79                         ret=VirtualAlloc(lastvalloced,len,MEM_COMMIT|MEM_RESERVE,PAGE_EXECUTE_READWRITE);
  80                         if (!ret)
  81                                 lastvalloced+=0x10000;
  82                         /* we failed to allocate one in the first round.
  83                          * try non-linear
  84                          */
  85                         if (!xflag && (lastvalloced<oldlastv)) { /* wrapped */
  86                                 FIXME(int31,"failed to allocate lineary growing memory (%d bytes), using non-linear growing...\n",len);
  87                                 xflag++;
  88                         }
  89                         /* if we even fail to allocate something in the next
  90                          * round, return NULL
  91                          */
  92                         if ((xflag==1) && (lastvalloced >= oldlastv))
  93                                 xflag++;
  94                         if ((xflag==2) && (lastvalloced < oldlastv)) {
  95                                 FIXME(int31,"failed to allocate any memory of %d bytes!\n",len);
  96                                 return NULL;
  97                         }
  98                 }
  99         } else
 100                  ret=VirtualAlloc(NULL,len,MEM_COMMIT|MEM_RESERVE,PAGE_EXECUTE_READWRITE);
 101         lastvalloced = (LPVOID)(((DWORD)ret+len+0xffff)&~0xffff);
 102         return ret;
 103 }
 104
 105 static void
 106 DPMI_xfree(LPVOID ptr) {
 107         VirtualFree(ptr,0,MEM_RELEASE);
 108 }
 109
 110 /* FIXME: perhaps we could grow this mapped area... */
 111 static LPVOID
 112 DPMI_xrealloc(LPVOID ptr,int newsize) {
 113         MEMORY_BASIC_INFORMATION        mbi;
 114         LPVOID                          newptr;
 115
 116         newptr = DPMI_xalloc(newsize);
 117         if (ptr) {
 118                 if (!VirtualQuery(ptr,&mbi,sizeof(mbi))) {
 119                         FIXME(int31,"realloc of DPMI_xallocd region %p?\n",ptr);
 120                         return NULL;
 121                 }
 122                 if (mbi.State == MEM_FREE) {
 123                         FIXME(int31,"realloc of DPMI_xallocd region %p?\n",ptr);
 124                         return NULL;
 125                 }
 126                 /* We do not shrink allocated memory. most reallocs
 127                  * only do grows anyway
 128                  */
 129                 if (newsize<=mbi.RegionSize)
 130                         return ptr;
 131                 memcpy(newptr,ptr,mbi.RegionSize);
 132                 DPMI_xfree(ptr);
 133         }
 134         return newptr;
 135 }
 136 /**********************************************************************
 137  *          INT_GetRealModeContext
 138  */
 139 static void INT_GetRealModeContext( REALMODECALL *call, CONTEXT *context )
 140 {
 141     EAX_reg(context) = call->eax;
 142     EBX_reg(context) = call->ebx;
 143     ECX_reg(context) = call->ecx;
 144     EDX_reg(context) = call->edx;
 145     ESI_reg(context) = call->esi;
 146     EDI_reg(context) = call->edi;
 147     EBP_reg(context) = call->ebp;
 148     EFL_reg(context) = call->fl | 0x00020000; /* V86 */
 149     EIP_reg(context) = call->ip;
 150     ESP_reg(context) = call->sp;
 151     CS_reg(context)  = call->cs;
 152     DS_reg(context)  = call->ds;
 153     ES_reg(context)  = call->es;
 154     FS_reg(context)  = call->fs;
 155     GS_reg(context)  = call->gs;
 156     (char*)V86BASE(context) = DOSMEM_MemoryBase(0);
 157 }
 158
 159
 160 /**********************************************************************
 161  *          INT_SetRealModeContext
 162  */
 163 static void INT_SetRealModeContext( REALMODECALL *call, CONTEXT *context )
 164 {
 165     call->eax = EAX_reg(context);
 166     call->ebx = EBX_reg(context);
 167     call->ecx = ECX_reg(context);
 168     call->edx = EDX_reg(context);
 169     call->esi = ESI_reg(context);
 170     call->edi = EDI_reg(context);
 171     call->ebp = EBP_reg(context);
 172     call->fl  = FL_reg(context);
 173     call->ip  = IP_reg(context);
 174     call->sp  = SP_reg(context);
 175     call->cs  = CS_reg(context);
 176     call->ds  = DS_reg(context);
 177     call->es  = ES_reg(context);
 178     call->fs  = FS_reg(context);
 179     call->gs  = GS_reg(context);
 180 }
 181
 182
 183 /**********************************************************************
 184  *          INT_DoRealModeInt
 185  */
 186 static void INT_DoRealModeInt( CONTEXT *context )
 187 {
 188     CONTEXT realmode_ctx;
 189     REALMODECALL *call = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context),
 190                                                           DI_reg(context) );
 191     INT_GetRealModeContext( call, &realmode_ctx );
 192
 193     RESET_CFLAG(context);
 194     if (INT_RealModeInterrupt( BL_reg(context), &realmode_ctx ))
 195       SET_CFLAG(context);
 196     if (EFL_reg(context)&1) {
 197       FIXME(int31,"%02x: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n",
 198             BL_reg(context), EAX_reg(&realmode_ctx), EBX_reg(&realmode_ctx),
 199             ECX_reg(&realmode_ctx), EDX_reg(&realmode_ctx));
 200       FIXME(int31,"      ESI=%08lx EDI=%08lx DS=%04lx ES=%04lx\n",
 201             ESI_reg(&realmode_ctx), EDI_reg(&realmode_ctx),
 202             DS_reg(&realmode_ctx), ES_reg(&realmode_ctx) );
 203     }
 204     INT_SetRealModeContext( call, &realmode_ctx );
 205 }
 206
 207
 208 static void CallRMProcFar( CONTEXT *context )
 209 {
 210     REALMODECALL *p = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) );
 211     CONTEXT context16;
 212     THDB *thdb = THREAD_Current();
 213     WORD argsize, sel;
 214     LPVOID addr;
 215     SEGPTR seg_addr;
 216
 217     TRACE(int31, "RealModeCall: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n",
 218         p->eax, p->ebx, p->ecx, p->edx);
 219     TRACE(int31, "              ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x, %d WORD arguments\n",
 220         p->esi, p->edi, p->es, p->ds, p->cs, p->ip, CX_reg(context) );
 221
 222     if (!(p->cs) && !(p->ip)) { /* remove this check
 223                                    if Int21/6501 case map function
 224                                    has been implemented */
 225         SET_CFLAG(context);
 226         return;
 227     }
 228     INT_GetRealModeContext(p, &context16);
 229
 230     addr = DOSMEM_MapRealToLinear(MAKELONG(p->ip, p->cs));
 231     sel = SELECTOR_AllocBlock( addr, 0x10000, SEGMENT_CODE, FALSE, FALSE );
 232     seg_addr = PTR_SEG_OFF_TO_SEGPTR( sel, 0 );
 233
 234     CS_reg(&context16) = HIWORD(seg_addr);
 235     IP_reg(&context16) = LOWORD(seg_addr);
 236     EBP_reg(&context16) = OFFSETOF( thdb->cur_stack )
 237                                + (WORD)&((STACK16FRAME*)0)->bp;
 238
 239     argsize = CX_reg(context)*sizeof(WORD);
 240     memcpy( ((LPBYTE)THREAD_STACK16(thdb))-argsize,
 241     (LPBYTE)PTR_SEG_OFF_TO_LIN(SS_reg(context), SP_reg(context))+6, argsize );
 242
 243     Callbacks->CallRegisterShortProc(&context16, argsize);
 244
 245     UnMapLS(seg_addr);
 246     INT_SetRealModeContext(p, &context16);
 247 }
 248
 249
 250 void WINAPI RMCallbackProc( FARPROC16 pmProc, REALMODECALL *rmc )
 251 {
 252     CONTEXT ctx;
 253     INT_GetRealModeContext(rmc, &ctx);
 254     Callbacks->CallRegisterShortProc(&ctx, 0);
 255 }
 256
 257
 258 static void AllocRMCB( CONTEXT *context )
 259 {
 260     RMCB *NewRMCB = HeapAlloc(GetProcessHeap(), 0, sizeof(RMCB));
 261     REALMODECALL *p = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) );
 262     UINT16 uParagraph;
 263
 264     FIXME(int31, "EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n", p->eax, p->ebx, p->ecx, p->edx);
 265     FIXME(int31, "           ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x\n", p->esi, p->edi, p->es, p->ds, p->cs, p->ip);
 266     FIXME(int31, "           Function to call: %04x:%04x\n",
 267          (WORD)DS_reg(context), SI_reg(context) );
 268
 269     if (NewRMCB)
 270     {
 271         LPVOID RMCBmem = DOSMEM_GetBlock(0, 20, &uParagraph);
 272         LPBYTE p = RMCBmem;
 273
 274         *p++ = 0x68; /* pushl */
 275         *(FARPROC16 *)p =
 276         PTR_SEG_OFF_TO_LIN(ES_reg(context), SI_reg(context)); /* pmode proc to call */
 277         p+=4;
 278         *p++ = 0x68; /* pushl */
 279         *(LPVOID *)p =
 280         PTR_SEG_OFF_TO_LIN(ES_reg(context), DI_reg(context));
 281         p+=4;
 282         *p++ = 0x9a; /* lcall */
 283         *(FARPROC16 *)p = (FARPROC16)RMCallbackProc; /* FIXME ? */
 284         p+=4;
 285         GET_CS(*(WORD *)p);
 286         p+=2;
 287         *p++=0xc3; /* retf */
 288         NewRMCB->address = MAKELONG(0, uParagraph);
 289         NewRMCB->next = FirstRMCB;
 290         FirstRMCB = NewRMCB;
 291         CX_reg(context) = uParagraph;
 292         DX_reg(context) = 0;
 293     }
 294     else
 295     {
 296         AX_reg(context) = 0x8015; /* callback unavailable */
 297         SET_CFLAG(context);
 298     }
 299 }
 300
 301
 302 static void FreeRMCB( CONTEXT *context )
 303 {
 304     RMCB *CurrRMCB = FirstRMCB;
 305     RMCB *PrevRMCB = NULL;
 306
 307     FIXME(int31, "callback address: %04x:%04x\n",
 308           CX_reg(context), DX_reg(context));
 309
 310     while (CurrRMCB && (CurrRMCB->address != MAKELONG(DX_reg(context), CX_reg(context))))
 311     {
 312         PrevRMCB = CurrRMCB;
 313         CurrRMCB = CurrRMCB->next;
 314     }
 315     if (CurrRMCB)
 316     {
 317         if (PrevRMCB)
 318         PrevRMCB->next = CurrRMCB->next;
 319             else
 320         FirstRMCB = CurrRMCB->next;
 321         DOSMEM_FreeBlock(0, DOSMEM_MapRealToLinear(CurrRMCB->address));
 322         HeapFree(GetProcessHeap(), 0, CurrRMCB);
 323     }
 324     else
 325     {
 326         AX_reg(context) = 0x8024; /* invalid callback address */
 327         SET_CFLAG(context);
 328     }
 329 }
 330
 331 #ifdef MZ_SUPPORTED
 332 /* (see loader/dos/module.c, function MZ_InitDPMI) */
 333
 334 static void StartPM( CONTEXT *context, LPDOSTASK lpDosTask )
 335 {
 336     char *base = DOSMEM_MemoryBase(0);
 337     UINT16 cs, ss, ds, es;
 338     CONTEXT pm_ctx;
 339
 340     RESET_CFLAG(context);
 341     lpDosTask->dpmi_flag = AX_reg(context);
 342 /* our mode switch wrapper have placed the desired CS into DX */
 343     cs = SELECTOR_AllocBlock( base + (DWORD)(DX_reg(context)<<4), 0x10000, SEGMENT_CODE, FALSE, FALSE );
 344     ss = SELECTOR_AllocBlock( base + (DWORD)(SS_reg(context)<<4), 0x10000, SEGMENT_DATA, FALSE, FALSE );
 345     ds = SELECTOR_AllocBlock( base + (DWORD)(DS_reg(context)<<4), 0x10000, SEGMENT_DATA, FALSE, FALSE );
 346     es = SELECTOR_AllocBlock( base + (DWORD)(lpDosTask->psp_seg<<4), 0x100, SEGMENT_DATA, FALSE, FALSE );
 347
 348     pm_ctx = *context;
 349     CS_reg(&pm_ctx) = lpDosTask->dpmi_sel;
 350 /* our mode switch wrapper expects the new CS in DX, and the new SS in AX */
 351     AX_reg(&pm_ctx) = ss;
 352     DX_reg(&pm_ctx) = cs;
 353     DS_reg(&pm_ctx) = ds;
 354     ES_reg(&pm_ctx) = es;
 355     FS_reg(&pm_ctx) = 0;
 356     GS_reg(&pm_ctx) = 0;
 357
 358     TRACE(int31,"DOS program is now entering protected mode\n");
 359     Callbacks->CallRegisterShortProc(&pm_ctx, 0);
 360
 361     /* in the current state of affairs, we won't ever actually return here... */
 362
 363     UnMapLS(PTR_SEG_OFF_TO_SEGPTR(es,0));
 364     UnMapLS(PTR_SEG_OFF_TO_SEGPTR(ds,0));
 365     UnMapLS(PTR_SEG_OFF_TO_SEGPTR(ss,0));
 366     UnMapLS(PTR_SEG_OFF_TO_SEGPTR(cs,0));
 367 }
 368 #endif
 369
 370 /**********************************************************************
 371  *          INT_Int31Handler
 372  *
 373  * Handler for int 31h (DPMI).
 374  */
 375
 376 void WINAPI INT_Int31Handler( CONTEXT *context )
 377 {
 378     /*
 379      * Note: For Win32s processes, the whole linear address space is
 380      *       shifted by 0x10000 relative to the OS linear address space.
 381      *       See the comment in msdos/vxd.c.
 382      */
 383     DWORD offset = PROCESS_Current()->flags & PDB32_WIN32S_PROC ? 0x10000 : 0;
 384     #define AppToWine(addr) ((addr)? ((DWORD)(addr)) + offset : 0)
 385     #define WineToApp(addr) ((addr)? ((DWORD)(addr)) - offset : 0)
 386
 387     DWORD dw;
 388     BYTE *ptr;
 389
 390     TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
 391     NE_MODULE *pModule = pTask ? NE_GetPtr( pTask->hModule ) : NULL;
 392
 393     GlobalUnlock16( GetCurrentTask() );
 394
 395 #ifdef MZ_SUPPORTED
 396     if (ISV86(context) && pModule && pModule->lpDosTask) {
 397         /* Called from real mode, check if it's our wrapper */
 398         TRACE(int31,"called from real mode\n");
 399         if (CS_reg(context)==pModule->lpDosTask->dpmi_seg) {
 400             /* This is the protected mode switch */
 401             StartPM(context,pModule->lpDosTask);
 402             return;
 403         } else
 404         if (CS_reg(context)==pModule->lpDosTask->xms_seg) {
 405             /* This is the XMS driver entry point */
 406             XMS_Handler(context);
 407             return;
 408         }
 409     }
 410 #endif
 411
 412     RESET_CFLAG(context);
 413     switch(AX_reg(context))
 414     {
 415     case 0x0000:  /* Allocate LDT descriptors */
 416         TRACE(int31,"allocate LDT descriptors (%d)\n",CX_reg(context));
 417         if (!(AX_reg(context) = AllocSelectorArray( CX_reg(context) )))
 418         {
 419             TRACE(int31,"failed\n");
 420             AX_reg(context) = 0x8011;  /* descriptor unavailable */
 421             SET_CFLAG(context);
 422         }
 423         TRACE(int31,"success, array starts at 0x%04x\n",AX_reg(context));
 424         break;
 425
 426     case 0x0001:  /* Free LDT descriptor */
 427         TRACE(int31,"free LDT descriptor (0x%04x)\n",BX_reg(context));
 428         if (FreeSelector( BX_reg(context) ))
 429         {
 430             AX_reg(context) = 0x8022;  /* invalid selector */
 431             SET_CFLAG(context);
 432         }
 433         else
 434         {
 435             /* If a segment register contains the selector being freed, */
 436             /* set it to zero. */
 437             if (!((DS_reg(context)^BX_reg(context)) & ~3)) DS_reg(context) = 0;
 438             if (!((ES_reg(context)^BX_reg(context)) & ~3)) ES_reg(context) = 0;
 439             if (!((FS_reg(context)^BX_reg(context)) & ~3)) FS_reg(context) = 0;
 440             if (!((GS_reg(context)^BX_reg(context)) & ~3)) GS_reg(context) = 0;
 441         }
 442         break;
 443
 444     case 0x0002:  /* Real mode segment to descriptor */
 445         TRACE(int31,"real mode segment to descriptor (0x%04x)\n",BX_reg(context));
 446         {
 447             WORD entryPoint = 0;  /* KERNEL entry point for descriptor */
 448             switch(BX_reg(context))
 449             {
 450             case 0x0000: entryPoint = 183; break;  /* __0000H */
 451             case 0x0040: entryPoint = 193; break;  /* __0040H */
 452             case 0xa000: entryPoint = 174; break;  /* __A000H */
 453             case 0xb000: entryPoint = 181; break;  /* __B000H */
 454             case 0xb800: entryPoint = 182; break;  /* __B800H */
 455             case 0xc000: entryPoint = 195; break;  /* __C000H */
 456             case 0xd000: entryPoint = 179; break;  /* __D000H */
 457             case 0xe000: entryPoint = 190; break;  /* __E000H */
 458             case 0xf000: entryPoint = 194; break;  /* __F000H */
 459             default:
 460                 AX_reg(context) = DOSMEM_AllocSelector(BX_reg(context));
 461                 break;
 462             }
 463             if (entryPoint)
 464                 AX_reg(context) = LOWORD(NE_GetEntryPoint(
 465                                                  GetModuleHandle16( "KERNEL" ),
 466                                                  entryPoint ));
 467         }
 468         break;
 469
 470     case 0x0003:  /* Get next selector increment */
 471         TRACE(int31,"get selector increment (__AHINCR)\n");
 472         AX_reg(context) = __AHINCR;
 473         break;
 474
 475     case 0x0004:  /* Lock selector (not supported) */
 476         FIXME(int31,"lock selector not supported\n");
 477         AX_reg(context) = 0;  /* FIXME: is this a correct return value? */
 478         break;
 479
 480     case 0x0005:  /* Unlock selector (not supported) */
 481         FIXME(int31,"unlock selector not supported\n");
 482         AX_reg(context) = 0;  /* FIXME: is this a correct return value? */
 483         break;
 484
 485     case 0x0006:  /* Get selector base address */
 486         TRACE(int31,"get selector base address (0x%04x)\n",BX_reg(context));
 487         if (!(dw = GetSelectorBase( BX_reg(context) )))
 488         {
 489             AX_reg(context) = 0x8022;  /* invalid selector */
 490             SET_CFLAG(context);
 491         }
 492         else
 493         {
 494 #ifdef MZ_SUPPORTED
 495             if (pModule && pModule->lpDosTask) {
 496                 DWORD base = (DWORD)DOSMEM_MemoryBase(pModule->self);
 497                 if ((dw >= base) && (dw < base + 0x110000)) dw -= base;
 498             }
 499 #endif
 500             CX_reg(context) = HIWORD(WineToApp(dw));
 501             DX_reg(context) = LOWORD(WineToApp(dw));
 502         }
 503         break;
 504
 505     case 0x0007:  /* Set selector base address */
 506         TRACE(int31, "set selector base address (0x%04x,0x%08lx)\n",
 507                      BX_reg(context),
 508                      AppToWine(MAKELONG(DX_reg(context),CX_reg(context))));
 509         dw = AppToWine(MAKELONG(DX_reg(context), CX_reg(context)));
 510 #ifdef MZ_SUPPORTED
 511         /* well, what else could we possibly do? */
 512         if (pModule && pModule->lpDosTask) {
 513             if (dw < 0x110000) dw += (DWORD)DOSMEM_MemoryBase(pModule->self);
 514         }
 515 #endif
 516         SetSelectorBase(BX_reg(context), dw);
 517         break;
 518
 519     case 0x0008:  /* Set selector limit */
 520         TRACE(int31,"set selector limit (0x%04x,0x%08lx)\n",BX_reg(context),MAKELONG(DX_reg(context),CX_reg(context)));
 521         dw = MAKELONG( DX_reg(context), CX_reg(context) );
 522 #ifdef MZ_SUPPORTED
 523         if (pModule && pModule->lpDosTask) {
 524             DWORD base = GetSelectorBase( BX_reg(context) );
 525             if ((dw == 0xffffffff) || ((base < 0x110000) && (base + dw > 0x110000))) {
 526                 AX_reg(context) = 0x8021;  /* invalid value */
 527                 SET_CFLAG(context);
 528                 break;
 529             }
 530         }
 531 #endif
 532         SetSelectorLimit( BX_reg(context), dw );
 533         break;
 534
 535     case 0x0009:  /* Set selector access rights */
 536         TRACE(int31,"set selector access rights(0x%04x,0x%04x)\n",BX_reg(context),CX_reg(context));
 537         SelectorAccessRights( BX_reg(context), 1, CX_reg(context) );
 538         break;
 539
 540     case 0x000a:  /* Allocate selector alias */
 541         TRACE(int31,"allocate selector alias (0x%04x)\n",BX_reg(context));
 542         if (!(AX_reg(context) = AllocCStoDSAlias( BX_reg(context) )))
 543         {
 544             AX_reg(context) = 0x8011;  /* descriptor unavailable */
 545             SET_CFLAG(context);
 546         }
 547         break;
 548
 549     case 0x000b:  /* Get descriptor */
 550         TRACE(int31,"get descriptor (0x%04x)\n",BX_reg(context));
 551         {
 552             ldt_entry entry;
 553             LDT_GetEntry( SELECTOR_TO_ENTRY( BX_reg(context) ), &entry );
 554             entry.base = WineToApp(entry.base);
 555
 556             /* FIXME: should use ES:EDI for 32-bit clients */
 557             LDT_EntryToBytes( PTR_SEG_OFF_TO_LIN( ES_reg(context),
 558                                                   DI_reg(context) ), &entry );
 559         }
 560         break;
 561
 562     case 0x000c:  /* Set descriptor */
 563         TRACE(int31,"set descriptor (0x%04x)\n",BX_reg(context));
 564         {
 565             ldt_entry entry;
 566             LDT_BytesToEntry( PTR_SEG_OFF_TO_LIN( ES_reg(context),
 567                                                   DI_reg(context) ), &entry );
 568             entry.base = AppToWine(entry.base);
 569
 570             LDT_SetEntry( SELECTOR_TO_ENTRY( BX_reg(context) ), &entry );
 571         }
 572         break;
 573
 574     case 0x000d:  /* Allocate specific LDT descriptor */
 575         FIXME(int31,"allocate descriptor (0x%04x), stub!\n",BX_reg(context));
 576         AX_reg(context) = 0x8011; /* descriptor unavailable */
 577         SET_CFLAG(context);
 578         break;
 579     case 0x0100:  /* Allocate DOS memory block */
 580         TRACE(int31,"allocate DOS memory block (0x%x paragraphs)\n",BX_reg(context));
 581         dw = GlobalDOSAlloc((DWORD)BX_reg(context)<<4);
 582         if (dw) {
 583             AX_reg(context) = HIWORD(dw);
 584             DX_reg(context) = LOWORD(dw);
 585         } else {
 586             AX_reg(context) = 0x0008; /* insufficient memory */
 587             BX_reg(context) = DOSMEM_Available(0)>>4;
 588             SET_CFLAG(context);
 589         }
 590         break;
 591     case 0x0101:  /* Free DOS memory block */
 592         TRACE(int31,"free DOS memory block (0x%04x)\n",DX_reg(context));
 593         dw = GlobalDOSFree(DX_reg(context));
 594         if (!dw) {
 595             AX_reg(context) = 0x0009; /* memory block address invalid */
 596             SET_CFLAG(context);
 597         }
 598         break;
 599     case 0x0200: /* get real mode interrupt vector */
 600         FIXME(int31,"get realmode interupt vector(0x%02x) unimplemented.\n",
 601               BL_reg(context));
 602         SET_CFLAG(context);
 603         break;
 604     case 0x0201: /* set real mode interrupt vector */
 605         FIXME(int31, "set realmode interupt vector(0x%02x,0x%04x:0x%04x) unimplemented\n", BL_reg(context),CX_reg(context),DX_reg(context));
 606         SET_CFLAG(context);
 607         break;
 608     case 0x0204:  /* Get protected mode interrupt vector */
 609         TRACE(int31,"get protected mode interrupt handler (0x%02x), stub!\n",BL_reg(context));
 610         dw = (DWORD)INT_GetPMHandler( BL_reg(context) );
 611         CX_reg(context) = HIWORD(dw);
 612         DX_reg(context) = LOWORD(dw);
 613         break;
 614
 615     case 0x0205:  /* Set protected mode interrupt vector */
 616         TRACE(int31,"set protected mode interrupt handler (0x%02x,%p), stub!\n",
 617             BL_reg(context),PTR_SEG_OFF_TO_LIN(CX_reg(context),DX_reg(context)));
 618         INT_SetPMHandler( BL_reg(context),
 619                           (FARPROC16)PTR_SEG_OFF_TO_SEGPTR( CX_reg(context),
 620                                                             DX_reg(context) ));
 621         break;
 622
 623     case 0x0300:  /* Simulate real mode interrupt */
 624         INT_DoRealModeInt( context );
 625         break;
 626
 627     case 0x0301:  /* Call real mode procedure with far return */
 628         CallRMProcFar( context );
 629         break;
 630
 631     case 0x0302:  /* Call real mode procedure with interrupt return */
 632         {
 633             REALMODECALL *p = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) );
 634             FIXME(int31, "RealModeCallIret: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n", p->eax, p->ebx, p->ecx, p->edx);
 635             FIXME(int31, "                  ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x\n", p->esi, p->edi, p->es, p->ds, p->cs, p->ip );
 636             SET_CFLAG(context);
 637         }
 638         break;
 639
 640     case 0x0303:  /* Allocate Real Mode Callback Address */
 641         AllocRMCB( context );
 642         break;
 643
 644     case 0x0304:  /* Free Real Mode Callback Address */
 645         FreeRMCB( context );
 646         break;
 647
 648     case 0x0400:  /* Get DPMI version */
 649         TRACE(int31,"get DPMI version\n");
 650         {
 651             SYSTEM_INFO si;
 652
 653             GetSystemInfo(&si);
 654             AX_reg(context) = 0x005a;  /* DPMI version 0.90 */
 655             BX_reg(context) = 0x0005;  /* Flags: 32-bit, virtual memory */
 656             CL_reg(context) = si.wProcessorLevel;
 657             DX_reg(context) = 0x0102;  /* Master/slave interrupt controller base*/
 658             break;
 659         }
 660     case 0x0500:  /* Get free memory information */
 661         TRACE(int31,"get free memory information\n");
 662         {
 663             MEMMANINFO mmi;
 664
 665             mmi.dwSize = sizeof(mmi);
 666             MemManInfo(&mmi);
 667             ptr = (BYTE *)PTR_SEG_OFF_TO_LIN(ES_reg(context),DI_reg(context));
 668             /* the layout is just the same as MEMMANINFO, but without
 669              * the dwSize entry.
 670              */
 671             memcpy(ptr,((char*)&mmi)+4,sizeof(mmi)-4);
 672             break;
 673         }
 674     case 0x0501:  /* Allocate memory block */
 675         TRACE(int31,"allocate memory block (%ld)\n",MAKELONG(CX_reg(context),BX_reg(context)));
 676         if (!(ptr = (BYTE *)DPMI_xalloc(MAKELONG(CX_reg(context), BX_reg(context)))))
 677         {
 678             AX_reg(context) = 0x8012;  /* linear memory not available */
 679             SET_CFLAG(context);
 680         } else {
 681             BX_reg(context) = SI_reg(context) = HIWORD(WineToApp(ptr));
 682             CX_reg(context) = DI_reg(context) = LOWORD(WineToApp(ptr));
 683         }
 684         break;
 685
 686     case 0x0502:  /* Free memory block */
 687         TRACE(int31, "free memory block (0x%08lx)\n",
 688                      AppToWine(MAKELONG(DI_reg(context),SI_reg(context))));
 689         DPMI_xfree( (void *)AppToWine(MAKELONG(DI_reg(context),
 690                                                SI_reg(context))) );
 691         break;
 692
 693     case 0x0503:  /* Resize memory block */
 694         TRACE(int31, "resize memory block (0x%08lx,%ld)\n",
 695                      AppToWine(MAKELONG(DI_reg(context),SI_reg(context))),
 696                      MAKELONG(CX_reg(context),BX_reg(context)));
 697         if (!(ptr = (BYTE *)DPMI_xrealloc(
 698                 (void *)AppToWine(MAKELONG(DI_reg(context),SI_reg(context))),
 699                 MAKELONG(CX_reg(context),BX_reg(context)))))
 700         {
 701             AX_reg(context) = 0x8012;  /* linear memory not available */
 702             SET_CFLAG(context);
 703         } else {
 704             BX_reg(context) = SI_reg(context) = HIWORD(WineToApp(ptr));
 705             CX_reg(context) = DI_reg(context) = LOWORD(WineToApp(ptr));
 706         }
 707         break;
 708
 709     case 0x0507:  /* Modify page attributes */
 710         FIXME(int31,"modify page attributes unimplemented\n");
 711         break;  /* Just ignore it */
 712
 713     case 0x0600:  /* Lock linear region */
 714         FIXME(int31,"lock linear region unimplemented\n");
 715         break;  /* Just ignore it */
 716
 717     case 0x0601:  /* Unlock linear region */
 718         FIXME(int31,"unlock linear region unimplemented\n");
 719         break;  /* Just ignore it */
 720
 721     case 0x0602:  /* Unlock real-mode region */
 722         FIXME(int31,"unlock realmode region unimplemented\n");
 723         break;  /* Just ignore it */
 724
 725     case 0x0603:  /* Lock real-mode region */
 726         FIXME(int31,"lock realmode region unimplemented\n");
 727         break;  /* Just ignore it */
 728
 729     case 0x0604:  /* Get page size */
 730         TRACE(int31,"get pagesize\n");
 731         BX_reg(context) = 0;
 732         CX_reg(context) = VIRTUAL_GetPageSize();
 733         break;
 734
 735     case 0x0702:  /* Mark page as demand-paging candidate */
 736         FIXME(int31,"mark page as demand-paging candidate\n");
 737         break;  /* Just ignore it */
 738
 739     case 0x0703:  /* Discard page contents */
 740         FIXME(int31,"discard page contents\n");
 741         break;  /* Just ignore it */
 742
 743      case 0x0800:  /* Physical address mapping */
 744         FIXME(int31,"map real to linear (0x%08lx)\n",MAKELONG(CX_reg(context),BX_reg(context)));
 745          if(!(ptr=DOSMEM_MapRealToLinear(MAKELONG(CX_reg(context),BX_reg(context)))))
 746          {
 747              AX_reg(context) = 0x8021;
 748              SET_CFLAG(context);
 749          }
 750          else
 751          {
 752              BX_reg(context) = HIWORD(WineToApp(ptr));
 753              CX_reg(context) = LOWORD(WineToApp(ptr));
 754              RESET_CFLAG(context);
 755          }
 756          break;
 757
 758     default:
 759         INT_BARF( context, 0x31 );
 760         AX_reg(context) = 0x8001;  /* unsupported function */
 761         SET_CFLAG(context);
 762         break;
 763     }
 764
 765     #undef AppToWine
 766     #undef WineToApp
 767 }