4 * Copyright 1995 Alexandre Julliard
21 #define DOS_GET_DRIVE(reg) ((reg) ? (reg) - 1 : DRIVE_GetCurrentDrive())
23 void CreateBPB(int drive, BYTE *data); /* defined in int21.c */
26 /* Structure for real-mode callbacks */
50 /**********************************************************************
51 * INT_GetRealModeContext
53 static void INT_GetRealModeContext( REALMODECALL *call, CONTEXT *context )
55 EAX_reg(context) = call->eax;
56 EBX_reg(context) = call->ebx;
57 ECX_reg(context) = call->ecx;
58 EDX_reg(context) = call->edx;
59 ESI_reg(context) = call->esi;
60 EDI_reg(context) = call->edi;
61 EBP_reg(context) = call->ebp;
62 EFL_reg(context) = call->fl;
63 EIP_reg(context) = call->ip;
64 ESP_reg(context) = call->sp;
65 CS_reg(context) = call->cs;
66 DS_reg(context) = call->ds;
67 ES_reg(context) = call->es;
68 FS_reg(context) = call->fs;
69 GS_reg(context) = call->gs;
73 /**********************************************************************
74 * INT_SetRealModeContext
76 static void INT_SetRealModeContext( REALMODECALL *call, CONTEXT *context )
78 call->eax = EAX_reg(context);
79 call->ebx = EBX_reg(context);
80 call->ecx = ECX_reg(context);
81 call->edx = EDX_reg(context);
82 call->esi = ESI_reg(context);
83 call->edi = EDI_reg(context);
84 call->ebp = EBP_reg(context);
85 call->fl = FL_reg(context);
86 call->ip = IP_reg(context);
87 call->sp = SP_reg(context);
88 call->cs = CS_reg(context);
89 call->ds = DS_reg(context);
90 call->es = ES_reg(context);
91 call->fs = FS_reg(context);
92 call->gs = GS_reg(context);
96 /**********************************************************************
99 static void INT_DoRealModeInt( CONTEXT *context )
101 CONTEXT realmode_ctx;
102 REALMODECALL *call = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context),
104 INT_GetRealModeContext( call, &realmode_ctx );
106 RESET_CFLAG(context);
107 switch (BL_reg(context))
109 case 0x2f: /* int2f */
110 switch (AH_reg(&realmode_ctx))
114 do_mscdex( &realmode_ctx );
121 case 0x21: /* int21 */
122 switch (AH_reg(&realmode_ctx))
125 ES_reg(&realmode_ctx) = 0;
126 EBX_reg(&realmode_ctx) = 0;
129 switch (AL_reg(&realmode_ctx))
132 {/* get collate table */
133 /* ES:DI is a REALMODE pointer to 5 byte dosmem
134 * we fill that with 0x6, realmode pointer to collateTB
136 char *table = DOSMEM_MapRealToLinear(
137 MAKELONG(EDI_reg(&realmode_ctx),ES_reg(&realmode_ctx)));
138 *(BYTE*)table = 0x06;
139 *(DWORD*)(table+1) = DOSMEM_CollateTable;
140 CX_reg(&realmode_ctx) = 258;/*FIXME: size of table?*/
149 switch (AL_reg(&realmode_ctx))
152 {/* generic block device request */
153 BYTE *dataptr = DOSMEM_MapRealToLinear(
154 MAKELONG(EDX_reg(&realmode_ctx),DS_reg(&realmode_ctx)));
155 int drive = DOS_GET_DRIVE(BL_reg(&realmode_ctx));
156 if (CH_reg(&realmode_ctx) != 0x08)
161 switch (CL_reg(&realmode_ctx))
165 char label[12],fsname[9],path[4];
168 strcpy(path,"x:\\");path[0]=drive+'A';
169 GetVolumeInformation32A(path,label,12,&serial,NULL,NULL,fsname,9);
171 memcpy(dataptr+2,&serial,4);
172 memcpy(dataptr+6,label ,11);
173 memcpy(dataptr+17,fsname,8);
176 case 0x60: /* get device parameters */
177 /* used by defrag.exe of win95 */
178 memset(dataptr, 0, 0x26);
180 dataptr[6] = 0; /* media type */
183 dataptr[1] = 0x05; /* fixed disk */
184 setword(&dataptr[2], 0x01); /* non removable */
185 setword(&dataptr[4], 0x300); /* # of cylinders */
189 dataptr[1] = 0x07; /* block dev, floppy */
190 setword(&dataptr[2], 0x02); /* removable */
191 setword(&dataptr[4], 80); /* # of cylinders */
193 CreateBPB(drive, &dataptr[7]);
216 if (EFL_reg(context)&1)
218 "RealModeInt %02x: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n"
219 " ESI=%08lx EDI=%08lx DS=%04lx ES=%04lx\n",
220 BL_reg(context), EAX_reg(&realmode_ctx),
221 EBX_reg(&realmode_ctx), ECX_reg(&realmode_ctx),
222 EDX_reg(&realmode_ctx), ESI_reg(&realmode_ctx),
223 EDI_reg(&realmode_ctx), DS_reg(&realmode_ctx),
224 ES_reg(&realmode_ctx) );
225 INT_SetRealModeContext( call, &realmode_ctx );
229 /**********************************************************************
232 * Handler for int 31h (DPMI).
234 void WINAPI INT_Int31Handler( CONTEXT *context )
239 RESET_CFLAG(context);
240 switch(AX_reg(context))
242 case 0x0000: /* Allocate LDT descriptors */
243 if (!(AX_reg(context) = AllocSelectorArray( CX_reg(context) )))
245 AX_reg(context) = 0x8011; /* descriptor unavailable */
250 case 0x0001: /* Free LDT descriptor */
251 if (FreeSelector( BX_reg(context) ))
253 AX_reg(context) = 0x8022; /* invalid selector */
258 /* If a segment register contains the selector being freed, */
259 /* set it to zero. */
260 if (!((DS_reg(context)^BX_reg(context)) & ~3)) DS_reg(context) = 0;
261 if (!((ES_reg(context)^BX_reg(context)) & ~3)) ES_reg(context) = 0;
262 if (!((FS_reg(context)^BX_reg(context)) & ~3)) FS_reg(context) = 0;
263 if (!((GS_reg(context)^BX_reg(context)) & ~3)) GS_reg(context) = 0;
267 case 0x0002: /* Real mode segment to descriptor */
269 WORD entryPoint = 0; /* KERNEL entry point for descriptor */
270 switch(BX_reg(context))
272 case 0x0000: entryPoint = 183; break; /* __0000H */
273 case 0x0040: entryPoint = 193; break; /* __0040H */
274 case 0xa000: entryPoint = 174; break; /* __A000H */
275 case 0xb000: entryPoint = 181; break; /* __B000H */
276 case 0xb800: entryPoint = 182; break; /* __B800H */
277 case 0xc000: entryPoint = 195; break; /* __C000H */
278 case 0xd000: entryPoint = 179; break; /* __D000H */
279 case 0xe000: entryPoint = 190; break; /* __E000H */
280 case 0xf000: entryPoint = 194; break; /* __F000H */
282 AX_reg(context) = DOSMEM_AllocSelector(BX_reg(context));
286 AX_reg(context) = LOWORD(MODULE_GetEntryPoint(
287 GetModuleHandle16( "KERNEL" ),
292 case 0x0003: /* Get next selector increment */
293 AX_reg(context) = __AHINCR;
296 case 0x0004: /* Lock selector (not supported) */
297 AX_reg(context) = 0; /* FIXME: is this a correct return value? */
300 case 0x0005: /* Unlock selector (not supported) */
301 AX_reg(context) = 0; /* FIXME: is this a correct return value? */
304 case 0x0006: /* Get selector base address */
305 if (!(dw = GetSelectorBase( BX_reg(context) )))
307 AX_reg(context) = 0x8022; /* invalid selector */
312 CX_reg(context) = HIWORD(dw);
313 DX_reg(context) = LOWORD(dw);
317 case 0x0007: /* Set selector base address */
318 SetSelectorBase( BX_reg(context),
319 MAKELONG( DX_reg(context), CX_reg(context) ) );
322 case 0x0008: /* Set selector limit */
323 SetSelectorLimit( BX_reg(context),
324 MAKELONG( DX_reg(context), CX_reg(context) ) );
327 case 0x0009: /* Set selector access rights */
328 SelectorAccessRights( BX_reg(context), 1, CX_reg(context) );
331 case 0x000a: /* Allocate selector alias */
332 if (!(AX_reg(context) = AllocCStoDSAlias( BX_reg(context) )))
334 AX_reg(context) = 0x8011; /* descriptor unavailable */
339 case 0x000b: /* Get descriptor */
342 LDT_GetEntry( SELECTOR_TO_ENTRY( BX_reg(context) ), &entry );
343 /* FIXME: should use ES:EDI for 32-bit clients */
344 LDT_EntryToBytes( PTR_SEG_OFF_TO_LIN( ES_reg(context),
345 DI_reg(context) ), &entry );
349 case 0x000c: /* Set descriptor */
352 LDT_BytesToEntry( PTR_SEG_OFF_TO_LIN( ES_reg(context),
353 DI_reg(context) ), &entry );
354 LDT_GetEntry( SELECTOR_TO_ENTRY( BX_reg(context) ), &entry );
358 case 0x000d: /* Allocate specific LDT descriptor */
359 AX_reg(context) = 0x8011; /* descriptor unavailable */
362 case 0x0200: /* get real mode interrupt vector */
364 "int31: get realmode interupt vector(0x%02x) unimplemented.\n",
369 case 0x0201: /* set real mode interrupt vector */
371 "int31: set realmode interupt vector(0x%02x,0x%04x:0x%04x) unimplemented\n",
372 BL_reg(context),CX_reg(context),DX_reg(context)
376 case 0x0204: /* Get protected mode interrupt vector */
377 dw = (DWORD)INT_GetHandler( BL_reg(context) );
378 CX_reg(context) = HIWORD(dw);
379 DX_reg(context) = LOWORD(dw);
382 case 0x0205: /* Set protected mode interrupt vector */
383 INT_SetHandler( BL_reg(context),
384 (FARPROC16)PTR_SEG_OFF_TO_SEGPTR( CX_reg(context),
388 case 0x0300: /* Simulate real mode interrupt */
389 INT_DoRealModeInt( context );
392 case 0x0301: /* Call real mode procedure with far return */
394 REALMODECALL *p = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) );
396 "RealModeCall: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n"
397 " ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x\n",
398 p->eax, p->ebx, p->ecx, p->edx,
399 p->esi, p->edi, p->es, p->ds, p->cs, p->ip );
404 case 0x0302: /* Call real mode procedure with interrupt return */
406 REALMODECALL *p = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) );
408 "RealModeCallIret: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n"
409 " ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x\n",
410 p->eax, p->ebx, p->ecx, p->edx,
411 p->esi, p->edi, p->es, p->ds, p->cs, p->ip );
416 case 0x0303: /* Allocate Real Mode Callback Address */
418 REALMODECALL *p = (REALMODECALL *)PTR_SEG_OFF_TO_LIN( ES_reg(context), DI_reg(context) );
420 "AllocRMCB: EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx\n"
421 " ESI=%08lx EDI=%08lx ES=%04x DS=%04x CS:IP=%04x:%04x\n"
422 " Function to call: %04x:%04x\n",
423 p->eax, p->ebx, p->ecx, p->edx,
424 p->esi, p->edi, p->es, p->ds, p->cs, p->ip,
425 (WORD)DS_reg(context), SI_reg(context) );
430 case 0x0400: /* Get DPMI version */
435 AX_reg(context) = 0x005a; /* DPMI version 0.90 */
436 BX_reg(context) = 0x0005; /* Flags: 32-bit, virtual memory */
437 CL_reg(context) = si.wProcessorLevel;
438 DX_reg(context) = 0x0102; /* Master/slave interrupt controller base*/
441 case 0x0500: /* Get free memory information */
445 mmi.dwSize = sizeof(mmi);
447 ptr = (BYTE *)PTR_SEG_OFF_TO_LIN(ES_reg(context),DI_reg(context));
448 /* the layout is just the same as MEMMANINFO, but without
451 memcpy(ptr,((char*)&mmi)+4,sizeof(mmi)-4);
454 case 0x0501: /* Allocate memory block */
455 if (!(ptr = (BYTE *)HeapAlloc( GetProcessHeap(), 0,
456 MAKELONG( CX_reg(context),
459 AX_reg(context) = 0x8012; /* linear memory not available */
464 BX_reg(context) = SI_reg(context) = HIWORD(ptr);
465 CX_reg(context) = DI_reg(context) = LOWORD(ptr);
469 case 0x0502: /* Free memory block */
470 HeapFree( GetProcessHeap(), 0,
471 (void *)MAKELONG( DI_reg(context), SI_reg(context) ) );
474 case 0x0503: /* Resize memory block */
475 if (!(ptr = (BYTE *)HeapReAlloc( GetProcessHeap(), 0,
476 (void *)MAKELONG(DI_reg(context),SI_reg(context)),
477 MAKELONG(CX_reg(context),BX_reg(context)))))
479 AX_reg(context) = 0x8012; /* linear memory not available */
484 BX_reg(context) = SI_reg(context) = HIWORD(ptr);
485 CX_reg(context) = DI_reg(context) = LOWORD(ptr);
489 case 0x0600: /* Lock linear region */
490 break; /* Just ignore it */
492 case 0x0601: /* Unlock linear region */
493 break; /* Just ignore it */
495 case 0x0602: /* Unlock real-mode region */
496 break; /* Just ignore it */
498 case 0x0603: /* Lock real-mode region */
499 break; /* Just ignore it */
501 case 0x0604: /* Get page size */
503 CX_reg(context) = 4096;
506 case 0x0702: /* Mark page as demand-paging candidate */
507 break; /* Just ignore it */
509 case 0x0703: /* Discard page contents */
510 break; /* Just ignore it */
513 INT_BARF( context, 0x31 );
514 AX_reg(context) = 0x8001; /* unsupported function */