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>
36 #ifdef HAVE_SYS_STAT_H
37 # include <sys/stat.h>
39 #ifdef HAVE_SYS_TIME_H
40 # include <sys/time.h>
44 #include "wine/winbase16.h"
48 #include "wine/debug.h"
53 WINE_DEFAULT_DEBUG_CHANNEL(module);
55 static BOOL DOSVM_isdosexe;
57 /**********************************************************************
60 * Return TRUE if we are in Windows process.
62 BOOL DOSVM_IsWin16(void)
64 return DOSVM_isdosexe ? FALSE : TRUE;
69 #ifdef HAVE_SYS_MMAN_H
70 # include <sys/mman.h>
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 */
77 #define BIOS_DATA_SEGMENT 0x40
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 */
105 /* global variables */
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 )
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);
128 psp->environment=env;
129 /* FIXME: more PSP stuff */
132 static void MZ_FillPSP( LPVOID lpPSP, LPCSTR cmdtail, int length )
138 WARN( "Command tail truncated! (length %d)\n", length );
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.
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 )
168 /* get size of environment block */
169 while (env[sz++]) sz+=strlen(env+sz)+1;
172 envblk=DOSMEM_AllocBlock(sz+sizeof(WORD)+strlen(name)+1,&seg);
175 memcpy(envblk,env,sz);
177 /* DOS environment variables are uppercase */
179 while (envblk[i] != '='){
180 if (envblk[i]>='a' && envblk[i] <= 'z'){
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);
194 static BOOL MZ_InitMemory(void)
196 /* initialize the memory */
197 TRACE("Initializing DOS memory structures\n");
198 DOSMEM_MapDosLayout();
199 DOSDEV_InstallDOSDevices();
204 static BOOL MZ_DoLoadImage( HANDLE hFile, LPCSTR filename, OverlayBlock *oblk, WORD par_env_seg )
206 IMAGE_DOS_HEADER mz_header;
207 DWORD image_start,image_size,min_size,max_size,avail;
208 BYTE*psp_start,*load_start,*oldenv = 0;
209 int x, old_com=0, alloc;
211 WORD env_seg, load_seg, rel_seg, oldpsp_seg;
215 /* DOS process already running, inherit from it */
218 oldpsp_seg = DOSVM_psp;
220 par_psp = (PDB16*)((DWORD)DOSVM_psp << 4);
221 oldenv = (LPBYTE)((DWORD)par_psp->environment << 4);
224 /* allocate new DOS process, inheriting from Wine environment */
228 oldenv = GetEnvironmentStringsA();
231 SetFilePointer(hFile,0,NULL,FILE_BEGIN);
232 if ( !ReadFile(hFile,&mz_header,sizeof(mz_header),&len,NULL)
233 || len != sizeof(mz_header)
234 || mz_header.e_magic != IMAGE_DOS_SIGNATURE) {
235 char *p = strrchr( filename, '.' );
236 if (!p || strcasecmp( p, ".com" )) /* check for .COM extension */
238 SetLastError(ERROR_BAD_FORMAT);
241 old_com=1; /* assume .COM file */
243 image_size=GetFileSize(hFile,NULL);
244 min_size=0x10000; max_size=0x100000;
246 mz_header.e_ss=0; mz_header.e_sp=0xFFFE;
247 mz_header.e_cs=0; mz_header.e_ip=0x100;
249 /* calculate load size */
250 image_start=mz_header.e_cparhdr<<4;
251 image_size=mz_header.e_cp<<9; /* pages are 512 bytes */
252 /* From Ralf Brown Interrupt List: If the word at offset 02h is 4, it should
253 * be treated as 00h, since pre-1.10 versions of the MS linker set it that
255 if ((mz_header.e_cblp!=0)&&(mz_header.e_cblp!=4)) image_size-=512-mz_header.e_cblp;
256 image_size-=image_start;
257 min_size=image_size+((DWORD)mz_header.e_minalloc<<4)+(PSP_SIZE<<4);
258 max_size=image_size+((DWORD)mz_header.e_maxalloc<<4)+(PSP_SIZE<<4);
261 if (alloc) MZ_InitMemory();
264 /* load overlay into preallocated memory */
265 load_seg=oblk->load_seg;
266 rel_seg=oblk->rel_seg;
267 load_start=(LPBYTE)((DWORD)load_seg<<4);
269 /* allocate environment block */
271 env_seg = par_env_seg;
273 env_seg=MZ_InitEnvironment(oldenv, filename);
275 FreeEnvironmentStringsA( oldenv);
277 /* allocate memory for the executable */
278 TRACE("Allocating DOS memory (min=%ld, max=%ld)\n",min_size,max_size);
279 avail=DOSMEM_Available();
280 if (avail<min_size) {
281 ERR("insufficient DOS memory\n");
282 SetLastError(ERROR_NOT_ENOUGH_MEMORY);
285 if (avail>max_size) avail=max_size;
286 psp_start=DOSMEM_AllocBlock(avail,&DOSVM_psp);
288 ERR("error allocating DOS memory\n");
289 SetLastError(ERROR_NOT_ENOUGH_MEMORY);
292 load_seg=DOSVM_psp+(old_com?0:PSP_SIZE);
294 load_start=psp_start+(PSP_SIZE<<4);
295 MZ_CreatePSP(psp_start, env_seg, oldpsp_seg);
298 /* load executable image */
299 TRACE("loading DOS %s image, %08lx bytes\n",old_com?"COM":"EXE",image_size);
300 SetFilePointer(hFile,image_start,NULL,FILE_BEGIN);
301 if (!ReadFile(hFile,load_start,image_size,&len,NULL) || len != image_size) {
302 /* check if this is due to the workaround for the pre-1.10 MS linker and we
303 realy had only 4 bytes on the last page */
304 if (mz_header.e_cblp != 4 || image_size - len != 512 - 4) {
305 SetLastError(ERROR_BAD_FORMAT);
310 if (mz_header.e_crlc) {
311 /* load relocation table */
312 TRACE("loading DOS EXE relocation table, %d entries\n",mz_header.e_crlc);
313 /* FIXME: is this too slow without read buffering? */
314 SetFilePointer(hFile,mz_header.e_lfarlc,NULL,FILE_BEGIN);
315 for (x=0; x<mz_header.e_crlc; x++) {
316 if (!ReadFile(hFile,&reloc,sizeof(reloc),&len,NULL) || len != sizeof(reloc)) {
317 SetLastError(ERROR_BAD_FORMAT);
320 *(WORD*)SEGPTR16(load_start,reloc)+=rel_seg;
325 init_cs = load_seg+mz_header.e_cs;
326 init_ip = mz_header.e_ip;
327 init_ss = load_seg+mz_header.e_ss;
328 init_sp = mz_header.e_sp;
330 /* .COM files exit with ret. Make sure they jump to psp start (=int 20) */
331 WORD* stack = PTR_REAL_TO_LIN(init_ss, init_sp);
335 TRACE("entry point: %04x:%04x\n",init_cs,init_ip);
338 if (alloc && !MZ_InitTask()) {
339 SetLastError(ERROR_GEN_FAILURE);
346 DOSVM_psp = oldpsp_seg;
351 /***********************************************************************
352 * wine_load_dos_exe (WINEDOS.@)
354 * Called from WineVDM when a new real-mode DOS process is started.
355 * Loads DOS program into memory and executes the program.
357 void WINAPI wine_load_dos_exe( LPCSTR filename, LPCSTR cmdline )
359 char dos_cmdtail[126];
362 HANDLE hFile = CreateFileA( filename, GENERIC_READ, FILE_SHARE_READ,
363 NULL, OPEN_EXISTING, 0, 0 );
364 if (hFile == INVALID_HANDLE_VALUE) return;
365 DOSVM_isdosexe = TRUE;
367 if(cmdline && *cmdline)
369 dos_length = strlen(cmdline);
370 memmove( dos_cmdtail + 1, cmdline,
371 (dos_length < 125) ? dos_length : 125 );
373 /* Non-empty command tail always starts with at least one space. */
374 dos_cmdtail[0] = ' ';
378 * If command tail is longer than 126 characters,
379 * set tail length to 127 and fill CMDLINE environment variable
380 * with full command line (this includes filename).
382 if (dos_length > 126)
384 char *cmd = HeapAlloc( GetProcessHeap(), 0,
385 dos_length + strlen(filename) + 4 );
392 * Append filename. If path includes spaces, quote the path.
394 if (strchr(filename, ' '))
397 strcpy( ptr, filename );
398 ptr += strlen(filename);
403 strcpy( ptr, filename );
404 ptr += strlen(filename);
408 * Append command tail.
410 if (cmdline[0] != ' ')
412 strcpy( ptr, cmdline );
415 * Set environment variable. This will be passed to
418 if (!SetEnvironmentVariableA( "CMDLINE", cmd ))
420 HeapFree(GetProcessHeap(), 0, cmd );
424 HeapFree(GetProcessHeap(), 0, cmd );
429 if (MZ_DoLoadImage( hFile, filename, NULL, 0 ))
430 MZ_Launch( dos_cmdtail, dos_length );
433 /***********************************************************************
436 * this may only be called from existing DOS processes
438 BOOL WINAPI MZ_Exec( CONTEXT86 *context, LPCSTR filename, BYTE func, LPVOID paramblk )
442 PROCESS_INFORMATION pe;
447 if(!GetBinaryTypeA(filename, &binType)) /* determine what kind of binary this is */
449 return FALSE; /* binary is not an executable */
452 /* handle non-dos executables */
453 if(binType != SCS_DOS_BINARY)
455 if(func == 0) /* load and execute */
459 LPBYTE psp_start = (LPBYTE)((DWORD)DOSVM_psp << 4);
460 PDB16 *psp = (PDB16 *)psp_start;
461 ExecBlock *blk = (ExecBlock *)paramblk;
462 LPBYTE cmdline = PTR_REAL_TO_LIN(SELECTOROF(blk->cmdline),OFFSETOF(blk->cmdline));
463 LPBYTE envblock = PTR_REAL_TO_LIN(psp->environment, 0);
464 int cmdLength = cmdline[0];
467 * If cmdLength is 127, command tail is truncated and environment
468 * variable CMDLINE should contain full command line
469 * (this includes filename).
471 if (cmdLength == 127)
473 FIXME( "CMDLINE argument passing is unimplemented.\n" );
474 cmdLength = 126; /* FIXME */
477 fullCmdLength = (strlen(filename) + 1) + cmdLength + 1; /* filename + space + cmdline + terminating null character */
479 fullCmdLine = HeapAlloc(GetProcessHeap(), 0, fullCmdLength);
480 if(!fullCmdLine) return FALSE; /* return false on memory alloc failure */
482 /* build the full command line from the executable file and the command line being passed in */
483 snprintf(fullCmdLine, fullCmdLength, "%s ", filename); /* start off with the executable filename and a space */
484 memcpy(fullCmdLine + strlen(fullCmdLine), cmdline + 1, cmdLength); /* append cmdline onto the end */
485 fullCmdLine[fullCmdLength - 1] = 0; /* null terminate string */
487 ZeroMemory (&st, sizeof(STARTUPINFOA));
488 st.cb = sizeof(STARTUPINFOA);
489 ret = CreateProcessA (NULL, fullCmdLine, NULL, NULL, TRUE, 0, envblock, NULL, &st, &pe);
491 /* wait for the app to finish and clean up PROCESS_INFORMATION handles */
494 WaitForSingleObject(pe.hProcess, INFINITE); /* wait here until the child process is complete */
495 CloseHandle(pe.hProcess);
496 CloseHandle(pe.hThread);
499 HeapFree(GetProcessHeap(), 0, fullCmdLine); /* free the memory we allocated */
503 FIXME("EXEC type of %d not implemented for non-dos executables\n", func);
508 } /* if(binType != SCS_DOS_BINARY) */
511 /* handle dos executables */
513 hFile = CreateFileA( filename, GENERIC_READ, FILE_SHARE_READ,
514 NULL, OPEN_EXISTING, 0, 0);
515 if (hFile == INVALID_HANDLE_VALUE) return FALSE;
518 case 0: /* load and execute */
519 case 1: /* load but don't execute */
521 /* save current process's return SS:SP now */
522 LPBYTE psp_start = (LPBYTE)((DWORD)DOSVM_psp << 4);
523 PDB16 *psp = (PDB16 *)psp_start;
524 psp->saveStack = (DWORD)MAKESEGPTR(context->SegSs, LOWORD(context->Esp));
526 ret = MZ_DoLoadImage( hFile, filename, NULL, ((ExecBlock *)paramblk)->env_seg );
528 /* MZ_LoadImage created a new PSP and loaded new values into it,
529 * let's work on the new values now */
530 LPBYTE psp_start = (LPBYTE)((DWORD)DOSVM_psp << 4);
531 ExecBlock *blk = (ExecBlock *)paramblk;
532 LPBYTE cmdline = PTR_REAL_TO_LIN(SELECTOROF(blk->cmdline),OFFSETOF(blk->cmdline));
534 /* First character contains the length of the command line. */
535 MZ_FillPSP(psp_start, cmdline + 1, cmdline[0]);
537 /* the lame MS-DOS engineers decided that the return address should be in int22 */
538 DOSVM_SetRMHandler(0x22, (FARPROC16)MAKESEGPTR(context->SegCs, LOWORD(context->Eip)));
540 /* don't execute, just return startup state */
543 * For function 01h, the AX value to be passed to the child program
544 * is put on top of the child's stack
548 stack = (LPBYTE) CTX_SEG_OFF_TO_LIN(context, init_ss, init_sp);
549 /* FIXME: push AX correctly */
550 stack[0] = 0x00; /* push AL */
551 stack[1] = 0x00; /* push AH */
553 blk->init_cs = init_cs;
554 blk->init_ip = init_ip;
555 blk->init_ss = init_ss;
556 blk->init_sp = init_sp;
558 /* execute by making us return to new process */
559 context->SegCs = init_cs;
560 context->Eip = init_ip;
561 context->SegSs = init_ss;
562 context->Esp = init_sp;
563 context->SegDs = DOSVM_psp;
564 context->SegEs = DOSVM_psp;
569 case 3: /* load overlay */
571 OverlayBlock *blk = (OverlayBlock *)paramblk;
572 ret = MZ_DoLoadImage( hFile, filename, blk, 0);
576 FIXME("EXEC load type %d not implemented\n", func);
577 SetLastError(ERROR_INVALID_FUNCTION);
584 /***********************************************************************
587 void WINAPI MZ_AllocDPMITask( void )
593 /***********************************************************************
596 void WINAPI MZ_RunInThread( PAPCFUNC proc, ULONG_PTR arg )
604 event = CreateEventW(NULL, TRUE, FALSE, NULL);
605 PostThreadMessageA(loop_tid, WM_USER, (WPARAM)event, (LPARAM)&spc);
606 WaitForSingleObject(event, INFINITE);
612 static DWORD WINAPI MZ_DOSVM( LPVOID lpExtra )
617 dosvm_pid = getpid();
619 memset( &context, 0, sizeof(context) );
620 context.SegCs = init_cs;
621 context.Eip = init_ip;
622 context.SegSs = init_ss;
623 context.Esp = init_sp;
624 context.SegDs = DOSVM_psp;
625 context.SegEs = DOSVM_psp;
626 context.EFlags = V86_FLAG | VIF_MASK;
627 DOSVM_SetTimer(0x10000);
628 ret = DOSVM_Enter( &context );
634 static BOOL MZ_InitTask(void)
636 if (!DuplicateHandle(GetCurrentProcess(), GetCurrentThread(),
637 GetCurrentProcess(), &loop_thread,
638 0, FALSE, DUPLICATE_SAME_ACCESS))
640 dosvm_thread = CreateThread(NULL, 0, MZ_DOSVM, NULL, CREATE_SUSPENDED, &dosvm_tid);
642 CloseHandle(loop_thread);
646 loop_tid = GetCurrentThreadId();
650 static void MZ_Launch( LPCSTR cmdtail, int length )
652 TDB *pTask = GlobalLock16( GetCurrentTask() );
653 BYTE *psp_start = PTR_REAL_TO_LIN( DOSVM_psp, 0 );
657 MZ_FillPSP(psp_start, cmdtail, length);
658 pTask->flags |= TDBF_WINOLDAP;
660 /* DTA is set to PSP:0080h when a program is started. */
661 pTask->dta = MAKESEGPTR( DOSVM_psp, 0x80 );
663 GetpWin16Lock( &lock );
664 _LeaveSysLevel( lock );
666 ResumeThread(dosvm_thread);
667 rv = DOSVM_Loop(dosvm_thread);
669 CloseHandle(dosvm_thread);
670 dosvm_thread = 0; dosvm_tid = 0;
671 CloseHandle(loop_thread);
672 loop_thread = 0; loop_tid = 0;
678 /***********************************************************************
681 void WINAPI MZ_Exit( CONTEXT86 *context, BOOL cs_psp, WORD retval )
684 WORD psp_seg = cs_psp ? context->SegCs : DOSVM_psp;
685 LPBYTE psp_start = (LPBYTE)((DWORD)psp_seg << 4);
686 PDB16 *psp = (PDB16 *)psp_start;
687 WORD parpsp = psp->parentPSP; /* check for parent DOS process */
689 /* retrieve parent's return address */
690 FARPROC16 retaddr = DOSVM_GetRMHandler(0x22);
691 /* restore interrupts */
692 DOSVM_SetRMHandler(0x22, psp->savedint22);
693 DOSVM_SetRMHandler(0x23, psp->savedint23);
694 DOSVM_SetRMHandler(0x24, psp->savedint24);
695 /* FIXME: deallocate file handles etc */
696 /* free process's associated memory
697 * FIXME: walk memory and deallocate all blocks owned by process */
698 DOSMEM_FreeBlock( PTR_REAL_TO_LIN(psp->environment,0) );
699 DOSMEM_FreeBlock( PTR_REAL_TO_LIN(DOSVM_psp,0) );
700 /* switch to parent's PSP */
702 psp_start = (LPBYTE)((DWORD)parpsp << 4);
703 psp = (PDB16 *)psp_start;
704 /* now return to parent */
705 DOSVM_retval = retval;
706 context->SegCs = SELECTOROF(retaddr);
707 context->Eip = OFFSETOF(retaddr);
708 context->SegSs = SELECTOROF(psp->saveStack);
709 context->Esp = OFFSETOF(psp->saveStack);
712 TRACE("killing DOS task\n");
714 ExitThread( retval );
718 /***********************************************************************
721 BOOL WINAPI MZ_Current( void )
723 return (dosvm_pid != 0); /* FIXME: do a better check */
726 #else /* !MZ_SUPPORTED */
728 /***********************************************************************
729 * wine_load_dos_exe (WINEDOS.@)
731 void WINAPI wine_load_dos_exe( LPCSTR filename, LPCSTR cmdline )
733 WARN("DOS executables not supported on this platform\n");
734 SetLastError(ERROR_BAD_FORMAT);
737 /***********************************************************************
740 BOOL WINAPI MZ_Exec( CONTEXT86 *context, LPCSTR filename, BYTE func, LPVOID paramblk )
743 SetLastError(ERROR_BAD_FORMAT);
747 /***********************************************************************
750 void WINAPI MZ_AllocDPMITask( void )
752 ERR("Actual real-mode calls not supported on this platform!\n");
755 /***********************************************************************
758 void WINAPI MZ_RunInThread( PAPCFUNC proc, ULONG_PTR arg )
763 /***********************************************************************
766 void WINAPI MZ_Exit( CONTEXT86 *context, BOOL cs_psp, WORD retval )
768 ExitThread( retval );
771 /***********************************************************************
774 BOOL WINAPI MZ_Current( void )
779 #endif /* !MZ_SUPPORTED */