4 * Copyright 1998 Ove Kåven
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.
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.
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
20 * Note: This code hasn't been completely cleaned up yet.
24 #include "wine/port.h"
35 #include <sys/types.h>
37 #ifdef HAVE_SYS_TIME_H
38 # include <sys/time.h>
42 #include "wine/winbase16.h"
46 #include "wine/debug.h"
51 WINE_DEFAULT_DEBUG_CHANNEL(module
);
53 static BOOL DOSVM_isdosexe
;
55 /**********************************************************************
58 * Return TRUE if we are in Windows process.
60 BOOL
DOSVM_IsWin16(void)
62 return DOSVM_isdosexe
? FALSE
: TRUE
;
67 #ifdef HAVE_SYS_MMAN_H
68 # include <sys/mman.h>
71 /* define this to try mapping through /proc/pid/mem instead of a temp file,
72 but Linus doesn't like mmapping /proc/pid/mem, so it doesn't work for me */
75 #define BIOS_DATA_SEGMENT 0x40
78 #define SEG16(ptr,seg) ((LPVOID)((BYTE*)ptr+((DWORD)(seg)<<4)))
79 #define SEGPTR16(ptr,segptr) ((LPVOID)((BYTE*)ptr+((DWORD)SELECTOROF(segptr)<<4)+OFFSETOF(segptr)))
81 /* structures for EXEC */
103 /* global variables */
107 static WORD init_cs
,init_ip
,init_ss
,init_sp
;
108 static HANDLE dosvm_thread
, loop_thread
;
109 static DWORD dosvm_tid
, loop_tid
;
111 static void MZ_Launch( LPCSTR cmdtail
, int length
);
112 static BOOL
MZ_InitTask(void);
114 static void MZ_CreatePSP( LPVOID lpPSP
, WORD env
, WORD par
)
118 psp
->int20
=0x20CD; /* int 20 */
119 /* some programs use this to calculate how much memory they need */
120 psp
->nextParagraph
=0x9FFF; /* FIXME: use a real value */
121 /* FIXME: dispatcher */
122 psp
->savedint22
= DOSVM_GetRMHandler(0x22);
123 psp
->savedint23
= DOSVM_GetRMHandler(0x23);
124 psp
->savedint24
= DOSVM_GetRMHandler(0x24);
126 psp
->environment
=env
;
127 /* FIXME: more PSP stuff */
130 static void MZ_FillPSP( LPVOID lpPSP
, LPCSTR cmdtail
, int length
)
136 WARN( "Command tail truncated! (length %d)\n", length
);
140 psp
->cmdLine
[0] = length
;
143 * Length of exactly 127 bytes means that full command line is
144 * stored in environment variable CMDLINE and PSP contains
145 * command tail truncated to 126 bytes.
151 memmove(psp
->cmdLine
+1, cmdtail
, length
);
153 psp
->cmdLine
[length
+1] = '\r';
155 /* FIXME: more PSP stuff */
158 static WORD
MZ_InitEnvironment( LPCSTR env
, LPCSTR name
)
166 /* get size of environment block */
167 while (env
[sz
++]) sz
+=strlen(env
+sz
)+1;
170 envblk
=DOSMEM_GetBlock(sz
+sizeof(WORD
)+strlen(name
)+1,&seg
);
173 memcpy(envblk
,env
,sz
);
175 /* DOS environment variables are uppercase */
177 while (envblk
[i
] != '='){
178 if (envblk
[i
]>='a' && envblk
[i
] <= 'z'){
183 i
+= strlen(envblk
+i
) + 1;
185 /* DOS 3.x: the block contains 1 additional string */
186 *(WORD
*)(envblk
+sz
)=1;
187 /* being the program name itself */
188 strcpy(envblk
+sz
+sizeof(WORD
),name
);
192 static BOOL
MZ_InitMemory(void)
194 /* initialize the memory */
195 TRACE("Initializing DOS memory structures\n");
197 DOSDEV_InstallDOSDevices();
202 static BOOL
MZ_DoLoadImage( HANDLE hFile
, LPCSTR filename
, OverlayBlock
*oblk
)
204 IMAGE_DOS_HEADER mz_header
;
205 DWORD image_start
,image_size
,min_size
,max_size
,avail
;
206 BYTE
*psp_start
,*load_start
,*oldenv
;
207 int x
, old_com
=0, alloc
;
209 WORD env_seg
, load_seg
, rel_seg
, oldpsp_seg
;
213 /* DOS process already running, inherit from it */
214 PDB16
* par_psp
= (PDB16
*)((DWORD
)DOSVM_psp
<< 4);
216 oldenv
= (LPBYTE
)((DWORD
)par_psp
->environment
<< 4);
217 oldpsp_seg
= DOSVM_psp
;
219 /* allocate new DOS process, inheriting from Wine environment */
221 oldenv
= GetEnvironmentStringsA();
225 SetFilePointer(hFile
,0,NULL
,FILE_BEGIN
);
226 if ( !ReadFile(hFile
,&mz_header
,sizeof(mz_header
),&len
,NULL
)
227 || len
!= sizeof(mz_header
)
228 || mz_header
.e_magic
!= IMAGE_DOS_SIGNATURE
) {
229 char *p
= strrchr( filename
, '.' );
230 if (!p
|| strcasecmp( p
, ".com" )) /* check for .COM extension */
232 SetLastError(ERROR_BAD_FORMAT
);
235 old_com
=1; /* assume .COM file */
237 image_size
=GetFileSize(hFile
,NULL
);
238 min_size
=0x10000; max_size
=0x100000;
240 mz_header
.e_ss
=0; mz_header
.e_sp
=0xFFFE;
241 mz_header
.e_cs
=0; mz_header
.e_ip
=0x100;
243 /* calculate load size */
244 image_start
=mz_header
.e_cparhdr
<<4;
245 image_size
=mz_header
.e_cp
<<9; /* pages are 512 bytes */
246 /* From Ralf Brown Interrupt List: If the word at offset 02h is 4, it should
247 * be treated as 00h, since pre-1.10 versions of the MS linker set it that
249 if ((mz_header
.e_cblp
!=0)&&(mz_header
.e_cblp
!=4)) image_size
-=512-mz_header
.e_cblp
;
250 image_size
-=image_start
;
251 min_size
=image_size
+((DWORD
)mz_header
.e_minalloc
<<4)+(PSP_SIZE
<<4);
252 max_size
=image_size
+((DWORD
)mz_header
.e_maxalloc
<<4)+(PSP_SIZE
<<4);
255 if (alloc
) MZ_InitMemory();
258 /* load overlay into preallocated memory */
259 load_seg
=oblk
->load_seg
;
260 rel_seg
=oblk
->rel_seg
;
261 load_start
=(LPBYTE
)((DWORD
)load_seg
<<4);
263 /* allocate environment block */
264 env_seg
=MZ_InitEnvironment(oldenv
, filename
);
266 /* allocate memory for the executable */
267 TRACE("Allocating DOS memory (min=%ld, max=%ld)\n",min_size
,max_size
);
268 avail
=DOSMEM_Available();
269 if (avail
<min_size
) {
270 ERR("insufficient DOS memory\n");
271 SetLastError(ERROR_NOT_ENOUGH_MEMORY
);
274 if (avail
>max_size
) avail
=max_size
;
275 psp_start
=DOSMEM_GetBlock(avail
,&DOSVM_psp
);
277 ERR("error allocating DOS memory\n");
278 SetLastError(ERROR_NOT_ENOUGH_MEMORY
);
281 load_seg
=DOSVM_psp
+(old_com
?0:PSP_SIZE
);
283 load_start
=psp_start
+(PSP_SIZE
<<4);
284 MZ_CreatePSP(psp_start
, env_seg
, oldpsp_seg
);
287 /* load executable image */
288 TRACE("loading DOS %s image, %08lx bytes\n",old_com
?"COM":"EXE",image_size
);
289 SetFilePointer(hFile
,image_start
,NULL
,FILE_BEGIN
);
290 if (!ReadFile(hFile
,load_start
,image_size
,&len
,NULL
) || len
!= image_size
) {
291 /* check if this is due to the workaround for the pre-1.10 MS linker and we
292 realy had only 4 bytes on the last page */
293 if (mz_header
.e_cblp
!= 4 || image_size
- len
!= 512 - 4) {
294 SetLastError(ERROR_BAD_FORMAT
);
299 if (mz_header
.e_crlc
) {
300 /* load relocation table */
301 TRACE("loading DOS EXE relocation table, %d entries\n",mz_header
.e_crlc
);
302 /* FIXME: is this too slow without read buffering? */
303 SetFilePointer(hFile
,mz_header
.e_lfarlc
,NULL
,FILE_BEGIN
);
304 for (x
=0; x
<mz_header
.e_crlc
; x
++) {
305 if (!ReadFile(hFile
,&reloc
,sizeof(reloc
),&len
,NULL
) || len
!= sizeof(reloc
)) {
306 SetLastError(ERROR_BAD_FORMAT
);
309 *(WORD
*)SEGPTR16(load_start
,reloc
)+=rel_seg
;
314 init_cs
= load_seg
+mz_header
.e_cs
;
315 init_ip
= mz_header
.e_ip
;
316 init_ss
= load_seg
+mz_header
.e_ss
;
317 init_sp
= mz_header
.e_sp
;
319 /* .COM files exit with ret. Make sure they jump to psp start (=int 20) */
320 WORD
* stack
= PTR_REAL_TO_LIN(init_ss
, init_sp
);
324 TRACE("entry point: %04x:%04x\n",init_cs
,init_ip
);
327 if (alloc
&& !MZ_InitTask()) {
328 SetLastError(ERROR_GEN_FAILURE
);
335 DOSVM_psp
= oldpsp_seg
;
340 /***********************************************************************
341 * wine_load_dos_exe (WINEDOS.@)
343 * Called from WineVDM when a new real-mode DOS process is started.
344 * Loads DOS program into memory and executes the program.
346 void WINAPI
wine_load_dos_exe( LPCSTR filename
, LPCSTR cmdline
)
348 char dos_cmdtail
[126];
351 HANDLE hFile
= CreateFileA( filename
, GENERIC_READ
, FILE_SHARE_READ
,
352 NULL
, OPEN_EXISTING
, 0, 0 );
353 if (hFile
== INVALID_HANDLE_VALUE
) return;
354 DOSVM_isdosexe
= TRUE
;
356 if(cmdline
&& *cmdline
)
358 dos_length
= strlen(cmdline
);
359 memmove( dos_cmdtail
+ 1, cmdline
,
360 (dos_length
< 125) ? dos_length
: 125 );
362 /* Non-empty command tail always starts with at least one space. */
363 dos_cmdtail
[0] = ' ';
367 * If command tail is longer than 126 characters,
368 * set tail length to 127 and fill CMDLINE environment variable
369 * with full command line (this includes filename).
371 if (dos_length
> 126)
373 char *cmd
= HeapAlloc( GetProcessHeap(), 0,
374 dos_length
+ strlen(filename
) + 4 );
381 * Append filename. If path includes spaces, quote the path.
383 if (strchr(filename
, ' '))
386 strcpy( ptr
, filename
);
387 ptr
+= strlen(filename
);
392 strcpy( ptr
, filename
);
393 ptr
+= strlen(filename
);
397 * Append command tail.
399 if (cmdline
[0] != ' ')
401 strcpy( ptr
, cmdline
);
404 * Set environment variable. This will be passed to
407 if (!SetEnvironmentVariableA( "CMDLINE", cmd
))
409 HeapFree(GetProcessHeap(), 0, cmd
);
413 HeapFree(GetProcessHeap(), 0, cmd
);
418 if (MZ_DoLoadImage( hFile
, filename
, NULL
))
419 MZ_Launch( dos_cmdtail
, dos_length
);
422 /***********************************************************************
425 * this may only be called from existing DOS processes
427 BOOL WINAPI
MZ_Exec( CONTEXT86
*context
, LPCSTR filename
, BYTE func
, LPVOID paramblk
)
431 PROCESS_INFORMATION pe
;
436 if(!GetBinaryTypeA(filename
, &binType
)) /* determine what kind of binary this is */
438 return FALSE
; /* binary is not an executable */
441 /* handle non-dos executables */
442 if(binType
!= SCS_DOS_BINARY
)
444 if(func
== 0) /* load and execute */
448 LPBYTE psp_start
= (LPBYTE
)((DWORD
)DOSVM_psp
<< 4);
449 PDB16
*psp
= (PDB16
*)psp_start
;
450 ExecBlock
*blk
= (ExecBlock
*)paramblk
;
451 LPBYTE cmdline
= PTR_REAL_TO_LIN(SELECTOROF(blk
->cmdline
),OFFSETOF(blk
->cmdline
));
452 LPBYTE envblock
= PTR_REAL_TO_LIN(psp
->environment
, 0);
453 int cmdLength
= cmdline
[0];
456 * If cmdLength is 127, command tail is truncated and environment
457 * variable CMDLINE should contain full command line
458 * (this includes filename).
460 if (cmdLength
== 127)
462 FIXME( "CMDLINE argument passing is unimplemented.\n" );
463 cmdLength
= 126; /* FIXME */
466 fullCmdLength
= (strlen(filename
) + 1) + cmdLength
+ 1; /* filename + space + cmdline + terminating null character */
468 fullCmdLine
= HeapAlloc(GetProcessHeap(), 0, fullCmdLength
);
469 if(!fullCmdLine
) return FALSE
; /* return false on memory alloc failure */
471 /* build the full command line from the executable file and the command line being passed in */
472 snprintf(fullCmdLine
, fullCmdLength
, "%s ", filename
); /* start off with the executable filename and a space */
473 memcpy(fullCmdLine
+ strlen(fullCmdLine
), cmdline
+ 1, cmdLength
); /* append cmdline onto the end */
474 fullCmdLine
[fullCmdLength
- 1] = 0; /* null terminate string */
476 ZeroMemory (&st
, sizeof(STARTUPINFOA
));
477 st
.cb
= sizeof(STARTUPINFOA
);
478 ret
= CreateProcessA (NULL
, fullCmdLine
, NULL
, NULL
, TRUE
, 0, envblock
, NULL
, &st
, &pe
);
480 /* wait for the app to finish and clean up PROCESS_INFORMATION handles */
483 WaitForSingleObject(pe
.hProcess
, INFINITE
); /* wait here until the child process is complete */
484 CloseHandle(pe
.hProcess
);
485 CloseHandle(pe
.hThread
);
488 HeapFree(GetProcessHeap(), 0, fullCmdLine
); /* free the memory we allocated */
492 FIXME("EXEC type of %d not implemented for non-dos executables\n", func
);
497 } /* if(binType != SCS_DOS_BINARY) */
500 /* handle dos executables */
502 hFile
= CreateFileA( filename
, GENERIC_READ
, FILE_SHARE_READ
,
503 NULL
, OPEN_EXISTING
, 0, 0);
504 if (hFile
== INVALID_HANDLE_VALUE
) return FALSE
;
507 case 0: /* load and execute */
508 case 1: /* load but don't execute */
510 /* save current process's return SS:SP now */
511 LPBYTE psp_start
= (LPBYTE
)((DWORD
)DOSVM_psp
<< 4);
512 PDB16
*psp
= (PDB16
*)psp_start
;
513 psp
->saveStack
= (DWORD
)MAKESEGPTR(context
->SegSs
, LOWORD(context
->Esp
));
515 ret
= MZ_DoLoadImage( hFile
, filename
, NULL
);
517 /* MZ_LoadImage created a new PSP and loaded new values into it,
518 * let's work on the new values now */
519 LPBYTE psp_start
= (LPBYTE
)((DWORD
)DOSVM_psp
<< 4);
520 ExecBlock
*blk
= (ExecBlock
*)paramblk
;
521 LPBYTE cmdline
= PTR_REAL_TO_LIN(SELECTOROF(blk
->cmdline
),OFFSETOF(blk
->cmdline
));
523 /* First character contains the length of the command line. */
524 MZ_FillPSP(psp_start
, cmdline
+ 1, cmdline
[0]);
526 /* the lame MS-DOS engineers decided that the return address should be in int22 */
527 DOSVM_SetRMHandler(0x22, (FARPROC16
)MAKESEGPTR(context
->SegCs
, LOWORD(context
->Eip
)));
529 /* don't execute, just return startup state */
532 * For function 01h, the AX value to be passed to the child program
533 * is put on top of the child's stack
537 stack
= (LPBYTE
) CTX_SEG_OFF_TO_LIN(context
, init_ss
, init_sp
);
538 /* FIXME: push AX correctly */
539 stack
[0] = 0x00; /* push AL */
540 stack
[1] = 0x00; /* push AH */
542 blk
->init_cs
= init_cs
;
543 blk
->init_ip
= init_ip
;
544 blk
->init_ss
= init_ss
;
545 blk
->init_sp
= init_sp
;
547 /* execute by making us return to new process */
548 context
->SegCs
= init_cs
;
549 context
->Eip
= init_ip
;
550 context
->SegSs
= init_ss
;
551 context
->Esp
= init_sp
;
552 context
->SegDs
= DOSVM_psp
;
553 context
->SegEs
= DOSVM_psp
;
558 case 3: /* load overlay */
560 OverlayBlock
*blk
= (OverlayBlock
*)paramblk
;
561 ret
= MZ_DoLoadImage( hFile
, filename
, blk
);
565 FIXME("EXEC load type %d not implemented\n", func
);
566 SetLastError(ERROR_INVALID_FUNCTION
);
573 /***********************************************************************
576 void WINAPI
MZ_AllocDPMITask( void )
582 /***********************************************************************
585 void WINAPI
MZ_RunInThread( PAPCFUNC proc
, ULONG_PTR arg
)
593 event
= CreateEventA(NULL
, TRUE
, FALSE
, NULL
);
594 PostThreadMessageA(loop_tid
, WM_USER
, (WPARAM
)event
, (LPARAM
)&spc
);
595 WaitForSingleObject(event
, INFINITE
);
601 static DWORD WINAPI
MZ_DOSVM( LPVOID lpExtra
)
606 dosvm_pid
= getpid();
608 memset( &context
, 0, sizeof(context
) );
609 context
.SegCs
= init_cs
;
610 context
.Eip
= init_ip
;
611 context
.SegSs
= init_ss
;
612 context
.Esp
= init_sp
;
613 context
.SegDs
= DOSVM_psp
;
614 context
.SegEs
= DOSVM_psp
;
615 context
.EFlags
= V86_FLAG
| VIF_MASK
;
616 DOSVM_SetTimer(0x10000);
617 ret
= DOSVM_Enter( &context
);
623 static BOOL
MZ_InitTask(void)
625 if (!DuplicateHandle(GetCurrentProcess(), GetCurrentThread(),
626 GetCurrentProcess(), &loop_thread
,
627 0, FALSE
, DUPLICATE_SAME_ACCESS
))
629 dosvm_thread
= CreateThread(NULL
, 0, MZ_DOSVM
, NULL
, CREATE_SUSPENDED
, &dosvm_tid
);
631 CloseHandle(loop_thread
);
635 loop_tid
= GetCurrentThreadId();
639 static void MZ_Launch( LPCSTR cmdtail
, int length
)
641 TDB
*pTask
= GlobalLock16( GetCurrentTask() );
642 BYTE
*psp_start
= PTR_REAL_TO_LIN( DOSVM_psp
, 0 );
646 MZ_FillPSP(psp_start
, cmdtail
, length
);
647 pTask
->flags
|= TDBF_WINOLDAP
;
649 /* DTA is set to PSP:0080h when a program is started. */
650 pTask
->dta
= MAKESEGPTR( DOSVM_psp
, 0x80 );
652 GetpWin16Lock( &lock
);
653 _LeaveSysLevel( lock
);
655 ResumeThread(dosvm_thread
);
656 rv
= DOSVM_Loop(dosvm_thread
);
658 CloseHandle(dosvm_thread
);
659 dosvm_thread
= 0; dosvm_tid
= 0;
660 CloseHandle(loop_thread
);
661 loop_thread
= 0; loop_tid
= 0;
667 /***********************************************************************
670 void WINAPI
MZ_Exit( CONTEXT86
*context
, BOOL cs_psp
, WORD retval
)
673 WORD psp_seg
= cs_psp
? context
->SegCs
: DOSVM_psp
;
674 LPBYTE psp_start
= (LPBYTE
)((DWORD
)psp_seg
<< 4);
675 PDB16
*psp
= (PDB16
*)psp_start
;
676 WORD parpsp
= psp
->parentPSP
; /* check for parent DOS process */
678 /* retrieve parent's return address */
679 FARPROC16 retaddr
= DOSVM_GetRMHandler(0x22);
680 /* restore interrupts */
681 DOSVM_SetRMHandler(0x22, psp
->savedint22
);
682 DOSVM_SetRMHandler(0x23, psp
->savedint23
);
683 DOSVM_SetRMHandler(0x24, psp
->savedint24
);
684 /* FIXME: deallocate file handles etc */
685 /* free process's associated memory
686 * FIXME: walk memory and deallocate all blocks owned by process */
687 DOSMEM_FreeBlock( PTR_REAL_TO_LIN(psp
->environment
,0) );
688 DOSMEM_FreeBlock( PTR_REAL_TO_LIN(DOSVM_psp
,0) );
689 /* switch to parent's PSP */
691 psp_start
= (LPBYTE
)((DWORD
)parpsp
<< 4);
692 psp
= (PDB16
*)psp_start
;
693 /* now return to parent */
694 DOSVM_retval
= retval
;
695 context
->SegCs
= SELECTOROF(retaddr
);
696 context
->Eip
= OFFSETOF(retaddr
);
697 context
->SegSs
= SELECTOROF(psp
->saveStack
);
698 context
->Esp
= OFFSETOF(psp
->saveStack
);
701 TRACE("killing DOS task\n");
703 ExitThread( retval
);
707 /***********************************************************************
710 BOOL WINAPI
MZ_Current( void )
712 return (dosvm_pid
!= 0); /* FIXME: do a better check */
715 #else /* !MZ_SUPPORTED */
717 /***********************************************************************
718 * wine_load_dos_exe (WINEDOS.@)
720 void WINAPI
wine_load_dos_exe( LPCSTR filename
, LPCSTR cmdline
)
722 WARN("DOS executables not supported on this platform\n");
723 SetLastError(ERROR_BAD_FORMAT
);
726 /***********************************************************************
729 BOOL WINAPI
MZ_Exec( CONTEXT86
*context
, LPCSTR filename
, BYTE func
, LPVOID paramblk
)
732 SetLastError(ERROR_BAD_FORMAT
);
736 /***********************************************************************
739 void WINAPI
MZ_AllocDPMITask( void )
741 ERR("Actual real-mode calls not supported on this platform!\n");
744 /***********************************************************************
747 void WINAPI
MZ_RunInThread( PAPCFUNC proc
, ULONG_PTR arg
)
752 /***********************************************************************
755 void WINAPI
MZ_Exit( CONTEXT86
*context
, BOOL cs_psp
, WORD retval
)
757 ExitThread( retval
);
760 /***********************************************************************
763 BOOL WINAPI
MZ_Current( void )
768 #endif /* !MZ_SUPPORTED */