user32: Fix user_thread_info for 64-bits
[wine/wine64.git] / dlls / winedos / module.c
blob0aa389f393410674cab9235999809446472a1dfd
1 /*
2 * DOS (MZ) loader
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20 * Note: This code hasn't been completely cleaned up yet.
23 #include "config.h"
24 #include "wine/port.h"
26 #include <stdarg.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <fcntl.h>
31 #include <signal.h>
32 #ifdef HAVE_UNISTD_H
33 # include <unistd.h>
34 #endif
35 #include <sys/types.h>
36 #ifdef HAVE_SYS_STAT_H
37 # include <sys/stat.h>
38 #endif
39 #ifdef HAVE_SYS_TIME_H
40 # include <sys/time.h>
41 #endif
42 #include "windef.h"
43 #include "winbase.h"
44 #include "wine/winbase16.h"
45 #include "wingdi.h"
46 #include "winuser.h"
47 #include "winerror.h"
48 #include "wine/debug.h"
49 #include "dosexe.h"
50 #include "dosvm.h"
51 #include "vga.h"
53 WINE_DEFAULT_DEBUG_CHANNEL(module);
55 static BOOL DOSVM_isdosexe;
57 /**********************************************************************
58 * DOSVM_IsWin16
60 * Return TRUE if we are in Windows process.
62 BOOL DOSVM_IsWin16(void)
64 return DOSVM_isdosexe ? FALSE : TRUE;
67 #ifdef MZ_SUPPORTED
69 #ifdef HAVE_SYS_MMAN_H
70 # include <sys/mman.h>
71 #endif
73 /* define this to try mapping through /proc/pid/mem instead of a temp file,
74 but Linus doesn't like mmapping /proc/pid/mem, so it doesn't work for me */
75 #undef MZ_MAPSELF
77 #define BIOS_DATA_SEGMENT 0x40
78 #define PSP_SIZE 0x10
80 #define SEG16(ptr,seg) ((LPVOID)((BYTE*)ptr+((DWORD)(seg)<<4)))
81 #define SEGPTR16(ptr,segptr) ((LPVOID)((BYTE*)ptr+((DWORD)SELECTOROF(segptr)<<4)+OFFSETOF(segptr)))
83 /* structures for EXEC */
85 #include "pshpack1.h"
87 typedef struct {
88 WORD env_seg;
89 DWORD cmdline;
90 DWORD fcb1;
91 DWORD fcb2;
92 WORD init_sp;
93 WORD init_ss;
94 WORD init_ip;
95 WORD init_cs;
96 } ExecBlock;
98 typedef struct {
99 WORD load_seg;
100 WORD rel_seg;
101 } OverlayBlock;
103 #include "poppack.h"
105 /* global variables */
107 pid_t dosvm_pid;
109 static WORD init_cs,init_ip,init_ss,init_sp;
110 static HANDLE dosvm_thread, loop_thread;
111 static DWORD dosvm_tid, loop_tid;
113 static void MZ_Launch( LPCSTR cmdtail, int length );
114 static BOOL MZ_InitTask(void);
116 static void MZ_CreatePSP( LPVOID lpPSP, WORD env, WORD par )
118 PDB16*psp=lpPSP;
120 psp->int20=0x20CD; /* int 20 */
121 /* some programs use this to calculate how much memory they need */
122 psp->nextParagraph=0x9FFF; /* FIXME: use a real value */
123 /* FIXME: dispatcher */
124 psp->savedint22 = DOSVM_GetRMHandler(0x22);
125 psp->savedint23 = DOSVM_GetRMHandler(0x23);
126 psp->savedint24 = DOSVM_GetRMHandler(0x24);
127 psp->parentPSP=par;
128 psp->environment=env;
129 /* FIXME: more PSP stuff */
132 static void MZ_FillPSP( LPVOID lpPSP, LPCSTR cmdtail, int length )
134 PDB16 *psp = lpPSP;
136 if(length > 127)
138 WARN( "Command tail truncated! (length %d)\n", length );
139 length = 126;
142 psp->cmdLine[0] = length;
145 * Length of exactly 127 bytes means that full command line is
146 * stored in environment variable CMDLINE and PSP contains
147 * command tail truncated to 126 bytes.
149 if(length == 127)
150 length = 126;
152 if(length > 0)
153 memmove(psp->cmdLine+1, cmdtail, length);
155 psp->cmdLine[length+1] = '\r';
157 /* FIXME: more PSP stuff */
160 static WORD MZ_InitEnvironment( LPCSTR env, LPCSTR name )
162 unsigned sz=0;
163 unsigned i=0;
164 WORD seg;
165 LPSTR envblk;
167 if (env) {
168 /* get size of environment block */
169 while (env[sz++]) sz+=strlen(env+sz)+1;
170 } else sz++;
171 /* allocate it */
172 envblk=DOSMEM_AllocBlock(sz+sizeof(WORD)+strlen(name)+1,&seg);
173 /* fill it */
174 if (env) {
175 memcpy(envblk,env,sz);
176 } else envblk[0]=0;
177 /* DOS environment variables are uppercase */
178 while (envblk[i]){
179 while (envblk[i] != '='){
180 if (envblk[i]>='a' && envblk[i] <= 'z'){
181 envblk[i] -= 32;
183 i++;
185 i += strlen(envblk+i) + 1;
187 /* DOS 3.x: the block contains 1 additional string */
188 *(WORD*)(envblk+sz)=1;
189 /* being the program name itself */
190 strcpy(envblk+sz+sizeof(WORD),name);
191 return seg;
194 static BOOL MZ_InitMemory(void)
196 /* initialize the memory */
197 TRACE("Initializing DOS memory structures\n");
198 DOSMEM_MapDosLayout();
199 DOSDEV_InstallDOSDevices();
200 MSCDEX_InstallCDROM();
202 return TRUE;
205 static BOOL MZ_DoLoadImage( HANDLE hFile, LPCSTR filename, OverlayBlock *oblk, WORD par_env_seg )
207 IMAGE_DOS_HEADER mz_header;
208 DWORD image_start,image_size,min_size,max_size,avail;
209 BYTE*psp_start,*load_start;
210 LPSTR oldenv = 0;
211 int x, old_com=0, alloc;
212 SEGPTR reloc;
213 WORD env_seg, load_seg, rel_seg, oldpsp_seg;
214 DWORD len;
216 if (DOSVM_psp) {
217 /* DOS process already running, inherit from it */
218 PDB16* par_psp;
219 alloc=0;
220 oldpsp_seg = DOSVM_psp;
221 if( !par_env_seg) {
222 par_psp = (PDB16*)((DWORD)DOSVM_psp << 4);
223 oldenv = (LPSTR)((DWORD)par_psp->environment << 4);
225 } else {
226 /* allocate new DOS process, inheriting from Wine environment */
227 alloc=1;
228 oldpsp_seg = 0;
229 if( !par_env_seg)
230 oldenv = GetEnvironmentStringsA();
233 SetFilePointer(hFile,0,NULL,FILE_BEGIN);
234 if ( !ReadFile(hFile,&mz_header,sizeof(mz_header),&len,NULL)
235 || len != sizeof(mz_header)
236 || mz_header.e_magic != IMAGE_DOS_SIGNATURE) {
237 char *p = strrchr( filename, '.' );
238 if (!p || strcasecmp( p, ".com" )) /* check for .COM extension */
240 SetLastError(ERROR_BAD_FORMAT);
241 goto load_error;
243 old_com=1; /* assume .COM file */
244 image_start=0;
245 image_size=GetFileSize(hFile,NULL);
246 min_size=0x10000; max_size=0x100000;
247 mz_header.e_crlc=0;
248 mz_header.e_ss=0; mz_header.e_sp=0xFFFE;
249 mz_header.e_cs=0; mz_header.e_ip=0x100;
250 } else {
251 /* calculate load size */
252 image_start=mz_header.e_cparhdr<<4;
253 image_size=mz_header.e_cp<<9; /* pages are 512 bytes */
254 /* From Ralf Brown Interrupt List: If the word at offset 02h is 4, it should
255 * be treated as 00h, since pre-1.10 versions of the MS linker set it that
256 * way. */
257 if ((mz_header.e_cblp!=0)&&(mz_header.e_cblp!=4)) image_size-=512-mz_header.e_cblp;
258 image_size-=image_start;
259 min_size=image_size+((DWORD)mz_header.e_minalloc<<4)+(PSP_SIZE<<4);
260 max_size=image_size+((DWORD)mz_header.e_maxalloc<<4)+(PSP_SIZE<<4);
263 if (alloc) MZ_InitMemory();
265 if (oblk) {
266 /* load overlay into preallocated memory */
267 load_seg=oblk->load_seg;
268 rel_seg=oblk->rel_seg;
269 load_start=(LPBYTE)((DWORD)load_seg<<4);
270 } else {
271 /* allocate environment block */
272 if( par_env_seg)
273 env_seg = par_env_seg;
274 else
275 env_seg=MZ_InitEnvironment(oldenv, filename);
276 if (alloc)
277 FreeEnvironmentStringsA( oldenv);
279 /* allocate memory for the executable */
280 TRACE("Allocating DOS memory (min=%d, max=%d)\n",min_size,max_size);
281 avail=DOSMEM_Available();
282 if (avail<min_size) {
283 ERR("insufficient DOS memory\n");
284 SetLastError(ERROR_NOT_ENOUGH_MEMORY);
285 goto load_error;
287 if (avail>max_size) avail=max_size;
288 psp_start=DOSMEM_AllocBlock(avail,&DOSVM_psp);
289 if (!psp_start) {
290 ERR("error allocating DOS memory\n");
291 SetLastError(ERROR_NOT_ENOUGH_MEMORY);
292 goto load_error;
294 load_seg=DOSVM_psp+(old_com?0:PSP_SIZE);
295 rel_seg=load_seg;
296 load_start=psp_start+(PSP_SIZE<<4);
297 MZ_CreatePSP(psp_start, env_seg, oldpsp_seg);
300 /* load executable image */
301 TRACE("loading DOS %s image, %08x bytes\n",old_com?"COM":"EXE",image_size);
302 SetFilePointer(hFile,image_start,NULL,FILE_BEGIN);
303 if (!ReadFile(hFile,load_start,image_size,&len,NULL) || len != image_size) {
304 /* check if this is due to the workaround for the pre-1.10 MS linker and we
305 really had only 4 bytes on the last page */
306 if (mz_header.e_cblp != 4 || image_size - len != 512 - 4) {
307 SetLastError(ERROR_BAD_FORMAT);
308 goto load_error;
312 if (mz_header.e_crlc) {
313 /* load relocation table */
314 TRACE("loading DOS EXE relocation table, %d entries\n",mz_header.e_crlc);
315 /* FIXME: is this too slow without read buffering? */
316 SetFilePointer(hFile,mz_header.e_lfarlc,NULL,FILE_BEGIN);
317 for (x=0; x<mz_header.e_crlc; x++) {
318 if (!ReadFile(hFile,&reloc,sizeof(reloc),&len,NULL) || len != sizeof(reloc)) {
319 SetLastError(ERROR_BAD_FORMAT);
320 goto load_error;
322 *(WORD*)SEGPTR16(load_start,reloc)+=rel_seg;
326 if (!oblk) {
327 init_cs = load_seg+mz_header.e_cs;
328 init_ip = mz_header.e_ip;
329 init_ss = load_seg+mz_header.e_ss;
330 init_sp = mz_header.e_sp;
331 if (old_com){
332 /* .COM files exit with ret. Make sure they jump to psp start (=int 20) */
333 WORD* stack = PTR_REAL_TO_LIN(init_ss, init_sp);
334 *stack = 0;
337 TRACE("entry point: %04x:%04x\n",init_cs,init_ip);
340 if (alloc && !MZ_InitTask()) {
341 SetLastError(ERROR_GEN_FAILURE);
342 return FALSE;
345 return TRUE;
347 load_error:
348 DOSVM_psp = oldpsp_seg;
350 return FALSE;
353 /***********************************************************************
354 * wine_load_dos_exe (WINEDOS.@)
356 * Called from WineVDM when a new real-mode DOS process is started.
357 * Loads DOS program into memory and executes the program.
359 void WINAPI wine_load_dos_exe( LPCSTR filename, LPCSTR cmdline )
361 char dos_cmdtail[126];
362 int dos_length = 0;
364 HANDLE hFile = CreateFileA( filename, GENERIC_READ, FILE_SHARE_READ,
365 NULL, OPEN_EXISTING, 0, 0 );
366 if (hFile == INVALID_HANDLE_VALUE) return;
367 DOSVM_isdosexe = TRUE;
369 if(cmdline && *cmdline)
371 dos_length = strlen(cmdline);
372 memmove( dos_cmdtail + 1, cmdline,
373 (dos_length < 125) ? dos_length : 125 );
375 /* Non-empty command tail always starts with at least one space. */
376 dos_cmdtail[0] = ' ';
377 dos_length++;
380 * If command tail is longer than 126 characters,
381 * set tail length to 127 and fill CMDLINE environment variable
382 * with full command line (this includes filename).
384 if (dos_length > 126)
386 char *cmd = HeapAlloc( GetProcessHeap(), 0,
387 dos_length + strlen(filename) + 4 );
388 char *ptr = cmd;
390 if (!cmd)
391 return;
394 * Append filename. If path includes spaces, quote the path.
396 if (strchr(filename, ' '))
398 *ptr++ = '\"';
399 strcpy( ptr, filename );
400 ptr += strlen(filename);
401 *ptr++ = '\"';
403 else
405 strcpy( ptr, filename );
406 ptr += strlen(filename);
410 * Append command tail.
412 if (cmdline[0] != ' ')
413 *ptr++ = ' ';
414 strcpy( ptr, cmdline );
417 * Set environment variable. This will be passed to
418 * new DOS process.
420 if (!SetEnvironmentVariableA( "CMDLINE", cmd ))
422 HeapFree(GetProcessHeap(), 0, cmd );
423 return;
426 HeapFree(GetProcessHeap(), 0, cmd );
427 dos_length = 127;
431 if (MZ_DoLoadImage( hFile, filename, NULL, 0 ))
432 MZ_Launch( dos_cmdtail, dos_length );
435 /***********************************************************************
436 * MZ_Exec
438 * this may only be called from existing DOS processes
440 BOOL WINAPI MZ_Exec( CONTEXT86 *context, LPCSTR filename, BYTE func, LPVOID paramblk )
442 DWORD binType;
443 STARTUPINFOA st;
444 PROCESS_INFORMATION pe;
445 HANDLE hFile;
447 BOOL ret = FALSE;
449 if(!GetBinaryTypeA(filename, &binType)) /* determine what kind of binary this is */
451 return FALSE; /* binary is not an executable */
454 /* handle non-dos executables */
455 if(binType != SCS_DOS_BINARY)
457 if(func == 0) /* load and execute */
459 LPSTR fullCmdLine;
460 WORD fullCmdLength;
461 LPBYTE psp_start = (LPBYTE)((DWORD)DOSVM_psp << 4);
462 PDB16 *psp = (PDB16 *)psp_start;
463 ExecBlock *blk = (ExecBlock *)paramblk;
464 LPBYTE cmdline = PTR_REAL_TO_LIN(SELECTOROF(blk->cmdline),OFFSETOF(blk->cmdline));
465 LPBYTE envblock = PTR_REAL_TO_LIN(psp->environment, 0);
466 int cmdLength = cmdline[0];
469 * If cmdLength is 127, command tail is truncated and environment
470 * variable CMDLINE should contain full command line
471 * (this includes filename).
473 if (cmdLength == 127)
475 FIXME( "CMDLINE argument passing is unimplemented.\n" );
476 cmdLength = 126; /* FIXME */
479 fullCmdLength = (strlen(filename) + 1) + cmdLength + 1; /* filename + space + cmdline + terminating null character */
481 fullCmdLine = HeapAlloc(GetProcessHeap(), 0, fullCmdLength);
482 if(!fullCmdLine) return FALSE; /* return false on memory alloc failure */
484 /* build the full command line from the executable file and the command line being passed in */
485 snprintf(fullCmdLine, fullCmdLength, "%s ", filename); /* start off with the executable filename and a space */
486 memcpy(fullCmdLine + strlen(fullCmdLine), cmdline + 1, cmdLength); /* append cmdline onto the end */
487 fullCmdLine[fullCmdLength - 1] = 0; /* null terminate string */
489 ZeroMemory (&st, sizeof(STARTUPINFOA));
490 st.cb = sizeof(STARTUPINFOA);
491 ret = CreateProcessA (NULL, fullCmdLine, NULL, NULL, TRUE, 0, envblock, NULL, &st, &pe);
493 /* wait for the app to finish and clean up PROCESS_INFORMATION handles */
494 if(ret)
496 WaitForSingleObject(pe.hProcess, INFINITE); /* wait here until the child process is complete */
497 CloseHandle(pe.hProcess);
498 CloseHandle(pe.hThread);
501 HeapFree(GetProcessHeap(), 0, fullCmdLine); /* free the memory we allocated */
503 else
505 FIXME("EXEC type of %d not implemented for non-dos executables\n", func);
506 ret = FALSE;
509 return ret;
510 } /* if(binType != SCS_DOS_BINARY) */
513 /* handle dos executables */
515 hFile = CreateFileA( filename, GENERIC_READ, FILE_SHARE_READ,
516 NULL, OPEN_EXISTING, 0, 0);
517 if (hFile == INVALID_HANDLE_VALUE) return FALSE;
519 switch (func) {
520 case 0: /* load and execute */
521 case 1: /* load but don't execute */
523 /* save current process's return SS:SP now */
524 LPBYTE psp_start = (LPBYTE)((DWORD)DOSVM_psp << 4);
525 PDB16 *psp = (PDB16 *)psp_start;
526 psp->saveStack = (DWORD)MAKESEGPTR(context->SegSs, LOWORD(context->Esp));
528 ret = MZ_DoLoadImage( hFile, filename, NULL, ((ExecBlock *)paramblk)->env_seg );
529 if (ret) {
530 /* MZ_LoadImage created a new PSP and loaded new values into it,
531 * let's work on the new values now */
532 LPBYTE psp_start = (LPBYTE)((DWORD)DOSVM_psp << 4);
533 ExecBlock *blk = (ExecBlock *)paramblk;
534 LPBYTE cmdline = PTR_REAL_TO_LIN(SELECTOROF(blk->cmdline),OFFSETOF(blk->cmdline));
536 /* First character contains the length of the command line. */
537 MZ_FillPSP(psp_start, (LPSTR)cmdline + 1, cmdline[0]);
539 /* the lame MS-DOS engineers decided that the return address should be in int22 */
540 DOSVM_SetRMHandler(0x22, (FARPROC16)MAKESEGPTR(context->SegCs, LOWORD(context->Eip)));
541 if (func) {
542 /* don't execute, just return startup state */
544 * From Ralph Brown:
545 * For function 01h, the AX value to be passed to the child program
546 * is put on top of the child's stack
548 LPBYTE stack;
549 init_sp -= 2;
550 stack = (LPBYTE) CTX_SEG_OFF_TO_LIN(context, init_ss, init_sp);
551 /* FIXME: push AX correctly */
552 stack[0] = 0x00; /* push AL */
553 stack[1] = 0x00; /* push AH */
555 blk->init_cs = init_cs;
556 blk->init_ip = init_ip;
557 blk->init_ss = init_ss;
558 blk->init_sp = init_sp;
559 } else {
560 /* execute by making us return to new process */
561 context->SegCs = init_cs;
562 context->Eip = init_ip;
563 context->SegSs = init_ss;
564 context->Esp = init_sp;
565 context->SegDs = DOSVM_psp;
566 context->SegEs = DOSVM_psp;
567 context->Eax = 0;
570 break;
571 case 3: /* load overlay */
573 OverlayBlock *blk = (OverlayBlock *)paramblk;
574 ret = MZ_DoLoadImage( hFile, filename, blk, 0);
576 break;
577 default:
578 FIXME("EXEC load type %d not implemented\n", func);
579 SetLastError(ERROR_INVALID_FUNCTION);
580 break;
582 CloseHandle(hFile);
583 return ret;
586 /***********************************************************************
587 * MZ_AllocDPMITask
589 void WINAPI MZ_AllocDPMITask( void )
591 MZ_InitMemory();
592 MZ_InitTask();
595 /***********************************************************************
596 * MZ_RunInThread
598 void WINAPI MZ_RunInThread( PAPCFUNC proc, ULONG_PTR arg )
600 if (loop_thread) {
601 DOS_SPC spc;
602 HANDLE event;
604 spc.proc = proc;
605 spc.arg = arg;
606 event = CreateEventW(NULL, TRUE, FALSE, NULL);
607 PostThreadMessageA(loop_tid, WM_USER, (WPARAM)event, (LPARAM)&spc);
608 WaitForSingleObject(event, INFINITE);
609 CloseHandle(event);
610 } else
611 proc(arg);
614 static DWORD WINAPI MZ_DOSVM( LPVOID lpExtra )
616 CONTEXT context;
617 INT ret;
619 dosvm_pid = getpid();
621 memset( &context, 0, sizeof(context) );
622 context.SegCs = init_cs;
623 context.Eip = init_ip;
624 context.SegSs = init_ss;
625 context.Esp = init_sp;
626 context.SegDs = DOSVM_psp;
627 context.SegEs = DOSVM_psp;
628 context.EFlags = V86_FLAG | VIF_MASK;
629 DOSVM_SetTimer(0x10000);
630 ret = DOSVM_Enter( &context );
631 if (ret == -1)
633 /* fetch the app name from the environment */
634 PDB16 *psp = PTR_REAL_TO_LIN( DOSVM_psp, 0 );
635 char *env = PTR_REAL_TO_LIN( psp->environment, 0 );
636 while (*env) env += strlen(env) + 1;
637 env += 1 + sizeof(WORD);
639 if (GetLastError() == ERROR_NOT_SUPPORTED)
640 MESSAGE( "wine: Cannot start DOS application %s\n"
641 " because vm86 mode is not supported on this platform.\n",
642 debugstr_a(env) );
643 else
644 FIXME( "vm86 mode failed error %u\n", GetLastError() );
646 dosvm_pid = 0;
647 return ret != 0;
650 static BOOL MZ_InitTask(void)
652 if (!DuplicateHandle(GetCurrentProcess(), GetCurrentThread(),
653 GetCurrentProcess(), &loop_thread,
654 0, FALSE, DUPLICATE_SAME_ACCESS))
655 return FALSE;
656 dosvm_thread = CreateThread(NULL, 0, MZ_DOSVM, NULL, CREATE_SUSPENDED, &dosvm_tid);
657 if (!dosvm_thread) {
658 CloseHandle(loop_thread);
659 loop_thread = 0;
660 return FALSE;
662 loop_tid = GetCurrentThreadId();
663 return TRUE;
666 static void MZ_Launch( LPCSTR cmdtail, int length )
668 TDB *pTask = GlobalLock16( GetCurrentTask() );
669 BYTE *psp_start = PTR_REAL_TO_LIN( DOSVM_psp, 0 );
670 DWORD rv;
671 SYSLEVEL *lock;
672 MSG msg;
674 MZ_FillPSP(psp_start, cmdtail, length);
675 pTask->flags |= TDBF_WINOLDAP;
677 /* DTA is set to PSP:0080h when a program is started. */
678 pTask->dta = MAKESEGPTR( DOSVM_psp, 0x80 );
680 GetpWin16Lock( &lock );
681 _LeaveSysLevel( lock );
683 /* force the message queue to be created */
684 PeekMessageW(&msg, NULL, WM_USER, WM_USER, PM_NOREMOVE);
686 ResumeThread(dosvm_thread);
687 rv = DOSVM_Loop(dosvm_thread);
689 CloseHandle(dosvm_thread);
690 dosvm_thread = 0; dosvm_tid = 0;
691 CloseHandle(loop_thread);
692 loop_thread = 0; loop_tid = 0;
694 VGA_Clean();
695 ExitProcess(rv);
698 /***********************************************************************
699 * MZ_Exit
701 void WINAPI MZ_Exit( CONTEXT86 *context, BOOL cs_psp, WORD retval )
703 if (DOSVM_psp) {
704 WORD psp_seg = cs_psp ? context->SegCs : DOSVM_psp;
705 LPBYTE psp_start = (LPBYTE)((DWORD)psp_seg << 4);
706 PDB16 *psp = (PDB16 *)psp_start;
707 WORD parpsp = psp->parentPSP; /* check for parent DOS process */
708 if (parpsp) {
709 /* retrieve parent's return address */
710 FARPROC16 retaddr = DOSVM_GetRMHandler(0x22);
711 /* restore interrupts */
712 DOSVM_SetRMHandler(0x22, psp->savedint22);
713 DOSVM_SetRMHandler(0x23, psp->savedint23);
714 DOSVM_SetRMHandler(0x24, psp->savedint24);
715 /* FIXME: deallocate file handles etc */
716 /* free process's associated memory
717 * FIXME: walk memory and deallocate all blocks owned by process */
718 DOSMEM_FreeBlock( PTR_REAL_TO_LIN(psp->environment,0) );
719 DOSMEM_FreeBlock( PTR_REAL_TO_LIN(DOSVM_psp,0) );
720 /* switch to parent's PSP */
721 DOSVM_psp = parpsp;
722 psp_start = (LPBYTE)((DWORD)parpsp << 4);
723 psp = (PDB16 *)psp_start;
724 /* now return to parent */
725 DOSVM_retval = retval;
726 context->SegCs = SELECTOROF(retaddr);
727 context->Eip = OFFSETOF(retaddr);
728 context->SegSs = SELECTOROF(psp->saveStack);
729 context->Esp = OFFSETOF(psp->saveStack);
730 return;
731 } else
732 TRACE("killing DOS task\n");
734 ExitThread( retval );
738 /***********************************************************************
739 * MZ_Current
741 BOOL WINAPI MZ_Current( void )
743 return (dosvm_pid != 0); /* FIXME: do a better check */
746 #else /* !MZ_SUPPORTED */
748 /***********************************************************************
749 * wine_load_dos_exe (WINEDOS.@)
751 void WINAPI wine_load_dos_exe( LPCSTR filename, LPCSTR cmdline )
753 FIXME("DOS executables not supported on this platform\n");
754 SetLastError(ERROR_BAD_FORMAT);
757 /***********************************************************************
758 * MZ_Exec
760 BOOL WINAPI MZ_Exec( CONTEXT86 *context, LPCSTR filename, BYTE func, LPVOID paramblk )
762 /* can't happen */
763 SetLastError(ERROR_BAD_FORMAT);
764 return FALSE;
767 /***********************************************************************
768 * MZ_AllocDPMITask
770 void WINAPI MZ_AllocDPMITask( void )
772 FIXME("Actual real-mode calls not supported on this platform!\n");
775 /***********************************************************************
776 * MZ_RunInThread
778 void WINAPI MZ_RunInThread( PAPCFUNC proc, ULONG_PTR arg )
780 proc(arg);
783 /***********************************************************************
784 * MZ_Exit
786 void WINAPI MZ_Exit( CONTEXT86 *context, BOOL cs_psp, WORD retval )
788 ExitThread( retval );
791 /***********************************************************************
792 * MZ_Current
794 BOOL WINAPI MZ_Current( void )
796 return FALSE;
799 #endif /* !MZ_SUPPORTED */