2 * DOS interrupt 21h handler
4 * Copyright 1993, 1994 Erik Bos
5 * Copyright 1996 Alexandre Julliard
6 * Copyright 1997 Andreas Mohr
7 * Copyright 1998 Uwe Bonnes
8 * Copyright 1998, 1999 Ove Kaaven
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with this library; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
30 #include "wine/winbase16.h"
36 #include "wine/unicode.h"
37 #include "wine/debug.h"
40 * FIXME: Delete this reference when all int21 code has been moved to winedos.
42 extern void WINAPI INT_Int21Handler( CONTEXT86 *context );
44 WINE_DEFAULT_DEBUG_CHANNEL(int21);
47 /***********************************************************************
50 static void INT21_Ioctl( CONTEXT86 *context )
52 static const WCHAR emmxxxx0W[] = {'E','M','M','X','X','X','X','0',0};
53 const DOS_DEVICE *dev = DOSFS_GetDeviceByHandle(
54 DosFileHandleToWin32Handle(BX_reg(context)) );
56 if (dev && !strcmpiW( dev->name, emmxxxx0W )) {
57 EMS_Ioctl_Handler(context);
61 switch (AL_reg(context))
63 case 0x0b: /* SET SHARING RETRY COUNT */
64 TRACE("IOCTL - SET SHARING RETRY COUNT pause %d retries %d\n",
65 CX_reg(context), DX_reg(context));
72 DOSMEM_LOL()->sharing_retry_delay = CX_reg(context);
74 DOSMEM_LOL()->sharing_retry_count = DX_reg(context);
78 INT_Int21Handler( context );
83 /***********************************************************************
84 * INT21_GetExtendedError
86 static void INT21_GetExtendedError( CONTEXT86 *context )
88 BYTE class, action, locus;
89 WORD error = GetLastError();
94 class = action = locus = 0;
96 case ERROR_DIR_NOT_EMPTY:
101 case ERROR_ACCESS_DENIED:
102 class = EC_AccessDenied;
106 case ERROR_CANNOT_MAKE:
107 class = EC_AccessDenied;
111 case ERROR_DISK_FULL:
112 case ERROR_HANDLE_DISK_FULL:
113 class = EC_MediaError;
117 case ERROR_FILE_EXISTS:
118 case ERROR_ALREADY_EXISTS:
123 case ERROR_FILE_NOT_FOUND:
128 case ER_GeneralFailure:
129 class = EC_SystemFailure;
133 case ERROR_INVALID_DRIVE:
134 class = EC_MediaError;
138 case ERROR_INVALID_HANDLE:
139 class = EC_ProgramError;
143 case ERROR_LOCK_VIOLATION:
144 class = EC_AccessDenied;
148 case ERROR_NO_MORE_FILES:
149 class = EC_MediaError;
158 case ERROR_NOT_ENOUGH_MEMORY:
159 class = EC_OutOfResource;
163 case ERROR_PATH_NOT_FOUND:
173 case ERROR_SHARING_VIOLATION:
174 class = EC_Temporary;
178 case ERROR_TOO_MANY_OPEN_FILES:
179 class = EC_ProgramError;
184 FIXME("Unknown error %d\n", error );
185 class = EC_SystemFailure;
190 TRACE("GET EXTENDED ERROR code 0x%02x class 0x%02x action 0x%02x locus %02x\n",
191 error, class, action, locus );
192 SET_AX( context, error );
193 SET_BH( context, class );
194 SET_BL( context, action );
195 SET_CH( context, locus );
199 /***********************************************************************
200 * DOSVM_Int21Handler (WINEDOS16.133)
202 * Interrupt 0x21 handler.
204 void WINAPI DOSVM_Int21Handler( CONTEXT86 *context )
206 BOOL bSetDOSExtendedError = FALSE;
208 TRACE( "AX=%04x BX=%04x CX=%04x DX=%04x "
209 "SI=%04x DI=%04x DS=%04x ES=%04x EFL=%08lx\n",
210 AX_reg(context), BX_reg(context),
211 CX_reg(context), DX_reg(context),
212 SI_reg(context), DI_reg(context),
213 (WORD)context->SegDs, (WORD)context->SegEs,
217 * Extended error is used by (at least) functions 0x2f to 0x62.
218 * Function 0x59 returns extended error and error should not
219 * be cleared before handling the function.
221 if (AH_reg(context) >= 0x2f && AH_reg(context) != 0x59)
224 RESET_CFLAG(context); /* Not sure if this is a good idea. */
226 switch(AH_reg(context))
228 case 0x00: /* TERMINATE PROGRAM */
229 TRACE("TERMINATE PROGRAM\n");
233 MZ_Exit( context, FALSE, 0 );
236 case 0x01: /* READ CHARACTER FROM STANDARD INPUT, WITH ECHO */
239 TRACE("DIRECT CHARACTER INPUT WITH ECHO\n");
240 DOSVM_Int16ReadChar(&ascii, NULL, FALSE);
241 SET_AL( context, ascii );
242 DOSVM_PutChar(AL_reg(context));
246 case 0x02: /* WRITE CHARACTER TO STANDARD OUTPUT */
247 TRACE("Write Character to Standard Output\n");
248 DOSVM_PutChar(DL_reg(context));
251 case 0x03: /* READ CHARACTER FROM STDAUX */
252 case 0x04: /* WRITE CHARACTER TO STDAUX */
253 case 0x05: /* WRITE CHARACTER TO PRINTER */
254 INT_BARF( context, 0x21 );
257 case 0x06: /* DIRECT CONSOLE IN/OUTPUT */
258 /* FIXME: Use DOSDEV_Peek/Read/Write(DOSDEV_Console(),...) !! */
259 if (DL_reg(context) == 0xff) {
260 static char scan = 0;
261 TRACE("Direct Console Input\n");
263 /* return pending scancode */
264 SET_AL( context, scan );
265 RESET_ZFLAG(context);
269 if (DOSVM_Int16ReadChar(&ascii,&scan,TRUE)) {
270 DOSVM_Int16ReadChar(&ascii,&scan,FALSE);
271 /* return ASCII code */
272 SET_AL( context, ascii );
273 RESET_ZFLAG(context);
274 /* return scan code on next call only if ascii==0 */
277 /* nothing pending, clear everything */
278 SET_AL( context, 0 );
280 scan = 0; /* just in case */
284 TRACE("Direct Console Output\n");
285 DOSVM_PutChar(DL_reg(context));
289 case 0x07: /* DIRECT CHARACTER INPUT WITHOUT ECHO */
292 /* FIXME: Use DOSDEV_Peek/Read(DOSDEV_Console(),...) !! */
293 TRACE("DIRECT CHARACTER INPUT WITHOUT ECHO\n");
294 DOSVM_Int16ReadChar(&ascii, NULL, FALSE);
295 SET_AL( context, ascii );
299 case 0x08: /* CHARACTER INPUT WITHOUT ECHO */
302 /* FIXME: Use DOSDEV_Peek/Read(DOSDEV_Console(),...) !! */
303 TRACE("CHARACTER INPUT WITHOUT ECHO\n");
304 DOSVM_Int16ReadChar(&ascii, NULL, FALSE);
305 SET_AL( context, ascii );
309 case 0x09: /* WRITE STRING TO STANDARD OUTPUT */
310 INT_Int21Handler( context );
313 case 0x0a: /* BUFFERED INPUT */
314 INT_Int21Handler( context );
317 case 0x0b: /* GET STDIN STATUS */
318 TRACE( "GET STDIN STATUS\n" );
320 BIOSDATA *data = BIOS_DATA;
321 if(data->FirstKbdCharPtr == data->NextKbdCharPtr)
322 SET_AL( context, 0 );
324 SET_AL( context, 0xff );
328 case 0x0c: /* FLUSH BUFFER AND READ STANDARD INPUT */
330 BYTE al = AL_reg(context); /* Input function to execute after flush. */
332 TRACE( "FLUSH BUFFER AND READ STANDARD INPUT - 0x%02x\n", al );
334 /* FIXME: buffers are not flushed */
337 * If AL is one of 0x01, 0x06, 0x07, 0x08, or 0x0a,
338 * int21 function identified by AL will be called.
340 if(al == 0x01 || al == 0x06 || al == 0x07 || al == 0x08 || al == 0x0a)
342 SET_AH( context, al );
343 DOSVM_Int21Handler( context );
348 case 0x0d: /* DISK BUFFER FLUSH */
349 TRACE("DISK BUFFER FLUSH ignored\n");
350 RESET_CFLAG( context ); /* dos 6+ only */
353 case 0x0e: /* SELECT DEFAULT DRIVE */
354 INT_Int21Handler( context );
357 case 0x0f: /* OPEN FILE USING FCB */
358 case 0x10: /* CLOSE FILE USING FCB */
359 INT_BARF( context, 0x21 );
362 case 0x11: /* FIND FIRST MATCHING FILE USING FCB */
363 case 0x12: /* FIND NEXT MATCHING FILE USING FCB */
364 case 0x13: /* DELETE FILE USING FCB */
365 INT_Int21Handler( context );
368 case 0x14: /* SEQUENTIAL READ FROM FCB FILE */
369 case 0x15: /* SEQUENTIAL WRITE TO FCB FILE */
370 case 0x16: /* CREATE OR TRUNCATE FILE USING FCB */
371 INT_BARF( context, 0x21 );
374 case 0x17: /* RENAME FILE USING FCB */
375 INT_Int21Handler( context );
378 case 0x18: /* NULL FUNCTION FOR CP/M COMPATIBILITY */
379 SET_AL( context, 0 );
382 case 0x19: /* GET CURRENT DEFAULT DRIVE */
383 case 0x1a: /* SET DISK TRANSFER AREA ADDRESS */
384 case 0x1b: /* GET ALLOCATION INFORMATION FOR DEFAULT DRIVE */
385 case 0x1c: /* GET ALLOCATION INFORMATION FOR SPECIFIC DRIVE */
386 INT_Int21Handler( context );
389 case 0x1d: /* NULL FUNCTION FOR CP/M COMPATIBILITY */
390 case 0x1e: /* NULL FUNCTION FOR CP/M COMPATIBILITY */
391 SET_AL( context, 0 );
394 case 0x1f: /* GET DRIVE PARAMETER BLOCK FOR DEFAULT DRIVE */
395 INT_Int21Handler( context );
398 case 0x20: /* NULL FUNCTION FOR CP/M COMPATIBILITY */
399 SET_AL( context, 0 );
402 case 0x21: /* READ RANDOM RECORD FROM FCB FILE */
403 case 0x22: /* WRITE RANDOM RECORD TO FCB FILE */
404 case 0x23: /* GET FILE SIZE FOR FCB */
405 case 0x24: /* SET RANDOM RECORD NUMBER FOR FCB */
406 INT_BARF( context, 0x21 );
409 case 0x25: /* SET INTERRUPT VECTOR */
410 TRACE("SET INTERRUPT VECTOR 0x%02x\n",AL_reg(context));
412 FARPROC16 ptr = (FARPROC16)MAKESEGPTR( context->SegDs, DX_reg(context) );
414 DOSVM_SetPMHandler16( AL_reg(context), ptr );
416 DOSVM_SetRMHandler( AL_reg(context), ptr );
420 case 0x26: /* CREATE NEW PROGRAM SEGMENT PREFIX */
421 case 0x27: /* RANDOM BLOCK READ FROM FCB FILE */
422 case 0x28: /* RANDOM BLOCK WRITE TO FCB FILE */
423 INT_BARF( context, 0x21 );
426 case 0x29: /* PARSE FILENAME INTO FCB */
427 case 0x2a: /* GET SYSTEM DATE */
428 INT_Int21Handler( context );
431 case 0x2b: /* SET SYSTEM DATE */
432 FIXME("SetSystemDate(%02d/%02d/%04d): not allowed\n",
433 DL_reg(context), DH_reg(context), CX_reg(context) );
434 SET_AL( context, 0 ); /* Let's pretend we succeeded */
437 case 0x2c: /* GET SYSTEM TIME */
438 INT_Int21Handler( context );
441 case 0x2d: /* SET SYSTEM TIME */
442 FIXME("SetSystemTime(%02d:%02d:%02d.%02d): not allowed\n",
443 CH_reg(context), CL_reg(context),
444 DH_reg(context), DL_reg(context) );
445 SET_AL( context, 0 ); /* Let's pretend we succeeded */
448 case 0x2e: /* SET VERIFY FLAG */
449 TRACE("SET VERIFY FLAG ignored\n");
450 /* we cannot change the behaviour anyway, so just ignore it */
453 case 0x2f: /* GET DISK TRANSFER AREA ADDRESS */
454 case 0x30: /* GET DOS VERSION */
455 INT_Int21Handler( context );
458 case 0x31: /* TERMINATE AND STAY RESIDENT */
459 FIXME("TERMINATE AND STAY RESIDENT stub\n");
462 case 0x32: /* GET DOS DRIVE PARAMETER BLOCK FOR SPECIFIC DRIVE */
463 case 0x33: /* MULTIPLEXED */
464 case 0x34: /* GET ADDRESS OF INDOS FLAG */
465 INT_Int21Handler( context );
468 case 0x35: /* GET INTERRUPT VECTOR */
469 TRACE("GET INTERRUPT VECTOR 0x%02x\n",AL_reg(context));
473 addr = DOSVM_GetPMHandler16( AL_reg(context) );
475 addr = DOSVM_GetRMHandler( AL_reg(context) );
476 context->SegEs = SELECTOROF(addr);
477 SET_BX( context, OFFSETOF(addr) );
481 case 0x36: /* GET FREE DISK SPACE */
482 case 0x37: /* SWITCHAR */
483 INT_Int21Handler( context );
486 case 0x38: /* GET COUNTRY-SPECIFIC INFORMATION */
487 TRACE( "GET COUNTRY-SPECIFIC INFORMATION for country 0x%02x\n",
489 SET_AX( context, 0x02 ); /* no country support available */
490 SET_CFLAG( context );
493 case 0x39: /* "MKDIR" - CREATE SUBDIRECTORY */
494 case 0x3a: /* "RMDIR" - REMOVE SUBDIRECTORY */
495 case 0x3b: /* "CHDIR" - SET CURRENT DIRECTORY */
496 case 0x3c: /* "CREAT" - CREATE OR TRUNCATE FILE */
497 case 0x3d: /* "OPEN" - OPEN EXISTING FILE */
498 case 0x3e: /* "CLOSE" - CLOSE FILE */
499 case 0x3f: /* "READ" - READ FROM FILE OR DEVICE */
500 INT_Int21Handler( context );
503 case 0x40: /* "WRITE" - WRITE TO FILE OR DEVICE */
504 /* Writes to stdout are handled here. */
505 if (!DOSVM_IsWin16() && BX_reg(context) == 1) {
506 BYTE *ptr = CTX_SEG_OFF_TO_LIN(context,
511 for(i=0; i<CX_reg(context); i++)
512 DOSVM_PutChar(ptr[i]);
514 INT_Int21Handler( context );
517 case 0x41: /* "UNLINK" - DELETE FILE */
518 case 0x42: /* "LSEEK" - SET CURRENT FILE POSITION */
519 case 0x43: /* FILE ATTRIBUTES */
520 INT_Int21Handler( context );
523 case 0x44: /* IOCTL */
524 INT21_Ioctl( context );
527 case 0x45: /* "DUP" - DUPLICATE FILE HANDLE */
528 case 0x46: /* "DUP2", "FORCEDUP" - FORCE DUPLICATE FILE HANDLE */
529 case 0x47: /* "CWD" - GET CURRENT DIRECTORY */
530 case 0x48: /* ALLOCATE MEMORY */
531 case 0x49: /* FREE MEMORY */
532 case 0x4a: /* RESIZE MEMORY BLOCK */
533 INT_Int21Handler( context );
536 case 0x4b: /* "EXEC" - LOAD AND/OR EXECUTE PROGRAM */
537 if(DOSVM_IsWin16()) {
538 INT_Int21Handler( context );
542 TRACE("EXEC %s\n", (LPCSTR)CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx ));
543 if (!MZ_Exec( context, CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx),
544 AL_reg(context), CTX_SEG_OFF_TO_LIN(context, context->SegEs, context->Ebx) ))
546 SET_AX( context, GetLastError() );
551 case 0x4c: /* "EXIT" - TERMINATE WITH RETURN CODE */
552 TRACE( "EXIT with return code %d\n", AL_reg(context) );
554 ExitThread( AL_reg(context) );
556 MZ_Exit( context, FALSE, AL_reg(context) );
559 case 0x4d: /* GET RETURN CODE */
560 TRACE("GET RETURN CODE (ERRORLEVEL)\n");
561 SET_AX( context, DOSVM_retval );
565 case 0x4e: /* "FINDFIRST" - FIND FIRST MATCHING FILE */
566 case 0x4f: /* "FINDNEXT" - FIND NEXT MATCHING FILE */
567 INT_Int21Handler( context );
570 case 0x50: /* SET CURRENT PROCESS ID (SET PSP ADDRESS) */
571 TRACE("SET CURRENT PROCESS ID (SET PSP ADDRESS)\n");
572 DOSVM_psp = BX_reg(context);
575 case 0x51: /* GET PSP ADDRESS */
576 if (DOSVM_IsWin16()) {
577 INT_Int21Handler( context );
581 TRACE("GET CURRENT PROCESS ID (GET PSP ADDRESS)\n");
582 /* FIXME: should we return the original DOS PSP upon */
583 /* Windows startup ? */
584 SET_BX( context, DOSVM_psp );
587 case 0x52: /* "SYSVARS" - GET LIST OF LISTS */
588 TRACE("SYSVARS - GET LIST OF LISTS\n");
591 FIXME("LOLSeg broken for now\n");
593 SET_BX( context, 0 );
597 context->SegEs = HIWORD(DOS_LOLSeg);
598 SET_BX( context, FIELD_OFFSET(DOS_LISTOFLISTS, ptr_first_DPB) );
602 case 0x54: /* Get Verify Flag */
603 TRACE("Get Verify Flag - Not Supported\n");
604 SET_AL( context, 0x00 ); /* pretend we can tell. 00h = off 01h = on */
607 case 0x56: /* "RENAME" - RENAME FILE */
608 case 0x57: /* FILE DATE AND TIME */
609 case 0x58: /* GET OR SET MEMORY/UMB ALLOCATION STRATEGY */
610 INT_Int21Handler( context );
613 case 0x59: /* GET EXTENDED ERROR INFO */
614 INT21_GetExtendedError( context );
617 case 0x5a: /* CREATE TEMPORARY FILE */
618 case 0x5b: /* CREATE NEW FILE */
619 case 0x5c: /* "FLOCK" - RECORD LOCKING */
620 case 0x5d: /* NETWORK 5D */
621 case 0x5e: /* NETWORK 5E */
622 case 0x5f: /* NETWORK 5F */
623 case 0x60: /* "TRUENAME" - CANONICALIZE FILENAME OR PATH */
624 case 0x61: /* UNUSED */
625 INT_Int21Handler( context );
628 case 0x62: /* GET PSP ADDRESS */
629 if (DOSVM_IsWin16()) {
630 INT_Int21Handler( context );
634 TRACE("GET CURRENT PSP ADDRESS\n");
635 /* FIXME: should we return the original DOS PSP upon */
636 /* Windows startup ? */
637 SET_BX( context, DOSVM_psp );
640 case 0x63: /* MISC. LANGUAGE SUPPORT */
641 case 0x64: /* OS/2 DOS BOX */
642 case 0x65: /* GET EXTENDED COUNTRY INFORMATION */
643 case 0x66: /* GLOBAL CODE PAGE TABLE */
644 case 0x67: /* SET HANDLE COUNT */
645 case 0x68: /* "FFLUSH" - COMMIT FILE */
646 case 0x69: /* DISK SERIAL NUMBER */
647 case 0x6a: /* COMMIT FILE */
648 INT_Int21Handler( context );
651 case 0x6b: /* NULL FUNCTION FOR CP/M COMPATIBILITY */
652 SET_AL( context, 0 );
655 case 0x6c: /* EXTENDED OPEN/CREATE */
656 case 0x70: /* MS-DOS 7 (Windows95) - ??? (country-specific?)*/
657 case 0x71: /* MS-DOS 7 (Windows95) - LONG FILENAME FUNCTIONS */
658 case 0x72: /* MS-DOS 7 (Windows95) - ??? */
659 case 0x73: /* MULTIPLEXED: Win95 OSR2/Win98 FAT32 calls */
660 case 0xdc: /* CONNECTION SERVICES - GET CONNECTION NUMBER */
661 case 0xea: /* NOVELL NETWARE - RETURN SHELL VERSION */
662 INT_Int21Handler( context );
666 INT_BARF( context, 0x21 );
669 } /* END OF SWITCH */
671 /* Set general error condition. */
672 if (bSetDOSExtendedError)
674 SET_AX( context, GetLastError() );
675 SET_CFLAG( context );
678 /* Print error code if carry flag is set. */
679 if (context->EFlags & 0x0001)
680 TRACE("failed, error %ld\n", GetLastError() );
682 TRACE( "returning: AX=%04x BX=%04x CX=%04x DX=%04x "
683 "SI=%04x DI=%04x DS=%04x ES=%04x EFL=%08lx\n",
684 AX_reg(context), BX_reg(context),
685 CX_reg(context), DX_reg(context),
686 SI_reg(context), DI_reg(context),
687 (WORD)context->SegDs, (WORD)context->SegEs,