4 * Copyright 1998 Ove Kåven
6 * This code hasn't been completely cleaned up yet.
16 #include <sys/types.h>
20 #include "wine/winbase16.h"
26 #include "selectors.h"
41 /* define this to try mapping through /proc/pid/mem instead of a temp file,
42 but Linus doesn't like mmapping /proc/pid/mem, so it doesn't work for me */
45 #define BIOS_DATA_SEGMENT 0x40
46 #define START_OFFSET 0
49 #define SEG16(ptr,seg) ((LPVOID)((BYTE*)ptr+((DWORD)(seg)<<4)))
50 #define SEGPTR16(ptr,segptr) ((LPVOID)((BYTE*)ptr+((DWORD)SELECTOROF(segptr)<<4)+OFFSETOF(segptr)))
52 static void MZ_InitPSP( LPVOID lpPSP, LPCSTR cmdline, WORD env )
55 const char*cmd=cmdline?strchr(cmdline,' '):NULL;
57 psp->int20=0x20CD; /* int 20 */
58 /* some programs use this to calculate how much memory they need */
59 psp->nextParagraph=0x9FFF;
64 /* command.com doesn't do this */
65 while (*cmd == ' ') cmd++;
67 psp->cmdLine[0]=strlen(cmd);
68 strcpy(psp->cmdLine+1,cmd);
69 psp->cmdLine[psp->cmdLine[0]+1]='\r';
70 } else psp->cmdLine[1]='\r';
71 /* FIXME: integrate the memory stuff from Wine (msdos/dosmem.c) */
72 /* FIXME: integrate the PDB stuff from Wine (loader/task.c) */
75 /* default INT 08 handler: increases timer tick counter but not much more */
77 0xCD,0x1C, /* int $0x1c */
80 0xB8,0x40,0x00, /* movw $0x40,%ax */
81 0x8E,0xD8, /* movw %ax,%ds */
83 0x83,0x06,0x6C,0x00,0x01, /* addw $1,(0x6c) */
84 0x83,0x16,0x6E,0x00,0x00, /* adcw $0,(0x6e) */
86 0x66,0xFF,0x06,0x6C,0x00, /* incl (0x6c) */
88 0xB0,0x20, /* movb $0x20,%al */
89 0xE6,0x20, /* outb %al,$0x20 */
95 static void MZ_InitHandlers( LPDOSTASK lpDosTask )
98 LPBYTE start=DOSMEM_GetBlock(lpDosTask->hModule,sizeof(int08),&seg);
99 memcpy(start,int08,sizeof(int08));
100 /* INT 08: point it at our tick-incrementing handler */
101 ((SEGPTR*)(lpDosTask->img))[0x08]=PTR_SEG_OFF_TO_SEGPTR(seg,0);
102 /* INT 1C: just point it to IRET, we don't want to handle it ourselves */
103 ((SEGPTR*)(lpDosTask->img))[0x1C]=PTR_SEG_OFF_TO_SEGPTR(seg,sizeof(int08)-1);
106 static char enter_xms[]={
107 /* XMS hookable entry point */
108 0xEB,0x03, /* jmp entry */
109 0x90,0x90,0x90, /* nop;nop;nop */
111 /* real entry point */
112 /* for simplicity, we'll just use the same hook as DPMI below */
113 0xCD,0x31, /* int $0x31 */
117 static void MZ_InitXMS( LPDOSTASK lpDosTask )
119 LPBYTE start=DOSMEM_GetBlock(lpDosTask->hModule,sizeof(enter_xms),&(lpDosTask->xms_seg));
120 memcpy(start,enter_xms,sizeof(enter_xms));
123 static char enter_pm[]={
124 0x50, /* pushw %ax */
125 0x52, /* pushw %dx */
126 0x55, /* pushw %bp */
127 0x89,0xE5, /* movw %sp,%bp */
129 0x8B,0x56,0x08, /* movw 8(%bp),%dx */
130 /* just call int 31 here to get into protected mode... */
131 /* it'll check whether it was called from dpmi_seg... */
132 0xCD,0x31, /* int $0x31 */
133 /* we are now in the context of a 16-bit relay call */
134 /* need to fixup our stack;
135 * 16-bit relay return address will be lost, but we won't worry quite yet */
136 0x8E,0xD0, /* movw %ax,%ss */
137 0x66,0x0F,0xB7,0xE5, /* movzwl %bp,%esp */
139 0x89,0x56,0x08, /* movw %dx,8(%bp) */
146 static void MZ_InitDPMI( LPDOSTASK lpDosTask )
148 unsigned size=sizeof(enter_pm);
149 LPBYTE start=DOSMEM_GetBlock(lpDosTask->hModule,size,&(lpDosTask->dpmi_seg));
151 lpDosTask->dpmi_sel = SELECTOR_AllocBlock( start, size, SEGMENT_CODE, FALSE, FALSE );
153 memcpy(start,enter_pm,sizeof(enter_pm));
156 static WORD MZ_InitEnvironment( LPDOSTASK lpDosTask, LPCSTR env, LPCSTR name )
163 /* get size of environment block */
164 while (env[sz++]) sz+=strlen(env+sz)+1;
167 envblk=DOSMEM_GetBlock(lpDosTask->hModule,sz+sizeof(WORD)+strlen(name)+1,&seg);
170 memcpy(envblk,env,sz);
172 /* DOS 3.x: the block contains 1 additional string */
173 *(WORD*)(envblk+sz)=1;
174 /* being the program name itself */
175 strcpy(envblk+sz+sizeof(WORD),name);
179 static BOOL MZ_InitMemory( LPDOSTASK lpDosTask, NE_MODULE *pModule )
183 if (lpDosTask->img_ofs) return TRUE; /* already allocated */
185 /* allocate 1MB+64K shared memory */
186 lpDosTask->img_ofs=START_OFFSET;
188 lpDosTask->img=VirtualAlloc(NULL,0x110000,MEM_COMMIT,PAGE_READWRITE);
189 /* make sure mmap accepts it */
190 ((char*)lpDosTask->img)[0x10FFFF]=0;
192 tmpnam(lpDosTask->mm_name);
193 /* strcpy(lpDosTask->mm_name,"/tmp/mydosimage"); */
194 lpDosTask->mm_fd=open(lpDosTask->mm_name,O_RDWR|O_CREAT /* |O_TRUNC */,S_IRUSR|S_IWUSR);
195 if (lpDosTask->mm_fd<0) ERR(module,"file %s could not be opened\n",lpDosTask->mm_name);
196 /* expand file to 1MB+64K */
197 lseek(lpDosTask->mm_fd,0x110000-1,SEEK_SET);
198 x=0; write(lpDosTask->mm_fd,&x,1);
200 lpDosTask->img=mmap(NULL,0x110000-START_OFFSET,PROT_READ|PROT_WRITE,MAP_SHARED,lpDosTask->mm_fd,0);
202 if (lpDosTask->img==(LPVOID)-1) {
203 ERR(module,"could not map shared memory, error=%s\n",strerror(errno));
206 TRACE(module,"DOS VM86 image mapped at %08lx\n",(DWORD)lpDosTask->img);
207 pModule->dos_image=lpDosTask->img;
209 /* initialize the memory */
210 TRACE(module,"Initializing DOS memory structures\n");
211 DOSMEM_Init(lpDosTask->hModule);
212 MZ_InitHandlers(lpDosTask);
213 MZ_InitXMS(lpDosTask);
214 MZ_InitDPMI(lpDosTask);
218 static BOOL MZ_LoadImage( HFILE hFile, OFSTRUCT *ofs, LPCSTR cmdline,
219 LPCSTR env, LPDOSTASK lpDosTask, NE_MODULE *pModule )
221 IMAGE_DOS_HEADER mz_header;
222 DWORD image_start,image_size,min_size,max_size,avail;
223 BYTE*psp_start,*load_start;
228 _llseek(hFile,0,FILE_BEGIN);
229 if ((_lread(hFile,&mz_header,sizeof(mz_header)) != sizeof(mz_header)) ||
230 (mz_header.e_magic != IMAGE_DOS_SIGNATURE)) {
231 old_com=1; /* assume .COM file */
233 image_size=GetFileSize(hFile,NULL);
234 min_size=0x10000; max_size=0x100000;
236 mz_header.e_ss=0; mz_header.e_sp=0xFFFE;
237 mz_header.e_cs=0; mz_header.e_ip=0x100;
239 /* calculate load size */
240 image_start=mz_header.e_cparhdr<<4;
241 image_size=mz_header.e_cp<<9; /* pages are 512 bytes */
242 if ((mz_header.e_cblp!=0)&&(mz_header.e_cblp!=4)) image_size-=512-mz_header.e_cblp;
243 image_size-=image_start;
244 min_size=image_size+((DWORD)mz_header.e_minalloc<<4)+(PSP_SIZE<<4);
245 max_size=image_size+((DWORD)mz_header.e_maxalloc<<4)+(PSP_SIZE<<4);
248 MZ_InitMemory(lpDosTask,pModule);
250 /* allocate environment block */
251 env_seg=MZ_InitEnvironment(lpDosTask,env,ofs->szPathName);
253 /* allocate memory for the executable */
254 TRACE(module,"Allocating DOS memory (min=%ld, max=%ld)\n",min_size,max_size);
255 avail=DOSMEM_Available(lpDosTask->hModule);
256 if (avail<min_size) {
257 ERR(module, "insufficient DOS memory\n");
258 SetLastError(ERROR_NOT_ENOUGH_MEMORY);
261 if (avail>max_size) avail=max_size;
262 psp_start=DOSMEM_GetBlock(lpDosTask->hModule,avail,&lpDosTask->psp_seg);
264 ERR(module, "error allocating DOS memory\n");
265 SetLastError(ERROR_NOT_ENOUGH_MEMORY);
268 lpDosTask->load_seg=lpDosTask->psp_seg+(old_com?0:PSP_SIZE);
269 load_start=psp_start+(PSP_SIZE<<4);
270 MZ_InitPSP(psp_start, cmdline, env_seg);
272 /* load executable image */
273 TRACE(module,"loading DOS %s image, %08lx bytes\n",old_com?"COM":"EXE",image_size);
274 _llseek(hFile,image_start,FILE_BEGIN);
275 if ((_lread(hFile,load_start,image_size)) != image_size) {
276 SetLastError(ERROR_BAD_FORMAT);
280 if (mz_header.e_crlc) {
281 /* load relocation table */
282 TRACE(module,"loading DOS EXE relocation table, %d entries\n",mz_header.e_crlc);
283 /* FIXME: is this too slow without read buffering? */
284 _llseek(hFile,mz_header.e_lfarlc,FILE_BEGIN);
285 for (x=0; x<mz_header.e_crlc; x++) {
286 if (_lread(hFile,&reloc,sizeof(reloc)) != sizeof(reloc)) {
287 SetLastError(ERROR_BAD_FORMAT);
290 *(WORD*)SEGPTR16(load_start,reloc)+=lpDosTask->load_seg;
294 lpDosTask->init_cs=lpDosTask->load_seg+mz_header.e_cs;
295 lpDosTask->init_ip=mz_header.e_ip;
296 lpDosTask->init_ss=lpDosTask->load_seg+mz_header.e_ss;
297 lpDosTask->init_sp=mz_header.e_sp;
299 TRACE(module,"entry point: %04x:%04x\n",lpDosTask->init_cs,lpDosTask->init_ip);
303 LPDOSTASK MZ_AllocDPMITask( HMODULE16 hModule )
305 LPDOSTASK lpDosTask = calloc(1, sizeof(DOSTASK));
309 lpDosTask->hModule = hModule;
311 pModule = (NE_MODULE *)GlobalLock16(hModule);
312 pModule->lpDosTask = lpDosTask;
314 lpDosTask->img=NULL; lpDosTask->mm_name[0]=0; lpDosTask->mm_fd=-1;
316 MZ_InitMemory(lpDosTask, pModule);
318 GlobalUnlock16(hModule);
323 static void MZ_InitTimer( LPDOSTASK lpDosTask, int ver )
326 /* can't make timer ticks */
331 /* start dosmod timer at 55Hz */
332 func=DOSMOD_SET_TIMER;
333 tim.tv_sec=0; tim.tv_usec=54925;
334 write(lpDosTask->write_pipe,&func,sizeof(func));
335 write(lpDosTask->write_pipe,&tim,sizeof(tim));
339 BOOL MZ_InitTask( LPDOSTASK lpDosTask )
341 int write_fd[2],x_fd;
343 char *fname,*farg,arg[16],fproc[64],path[256],*fpath;
344 SECURITY_ATTRIBUTES attr={sizeof(attr),NULL,TRUE};
345 struct get_read_fd_request r_req;
346 struct get_write_fd_request w_req;
348 if (!lpDosTask) return FALSE;
350 /* this happens in the wrong process context, so we have to let the new process
351 inherit it... (FIXME: call MZ_InitTask in the right process context) */
352 if (!CreatePipe(&(lpDosTask->hReadPipe),&(lpDosTask->hXPipe),&attr,0)) return FALSE;
353 if (pipe(write_fd)<0) {
354 CloseHandle(lpDosTask->hReadPipe);
355 CloseHandle(lpDosTask->hXPipe);
358 r_req.handle = lpDosTask->hReadPipe;
359 CLIENT_SendRequest( REQ_GET_READ_FD, -1, 1, &r_req, sizeof(r_req) );
360 CLIENT_WaitReply( NULL, &(lpDosTask->read_pipe), 0 );
361 w_req.handle = lpDosTask->hXPipe;
362 CLIENT_SendRequest( REQ_GET_WRITE_FD, -1, 1, &w_req, sizeof(w_req) );
363 CLIENT_WaitReply( NULL, &x_fd, 0 );
365 TRACE(module,"win32 pipe: read=%d, write=%d, unix pipe: read=%d, write=%d\n",
366 lpDosTask->hReadPipe,lpDosTask->hXPipe,lpDosTask->read_pipe,x_fd);
367 TRACE(module,"outbound unix pipe: read=%d, write=%d, pid=%d\n",write_fd[0],write_fd[1],getpid());
369 lpDosTask->write_pipe=write_fd[1];
371 /* if we have a mapping file, use it */
372 fname=lpDosTask->mm_name; farg=NULL;
374 /* otherwise, map our own memory image */
375 sprintf(fproc,"/proc/%d/mem",getpid());
376 sprintf(arg,"%ld",(unsigned long)lpDosTask->img);
377 fname=fproc; farg=arg;
380 TRACE(module,"Loading DOS VM support module (hmodule=%04x)\n",lpDosTask->hModule);
381 if ((child=fork())<0) {
383 close(lpDosTask->read_pipe);
384 close(lpDosTask->write_pipe);
386 CloseHandle(lpDosTask->hReadPipe);
387 CloseHandle(lpDosTask->hXPipe);
396 lpDosTask->task=child;
397 /* wait for child process to signal readiness */
399 if (read(lpDosTask->read_pipe,&ret,sizeof(ret))!=sizeof(ret)) {
400 if ((errno==EINTR)||(errno==EAGAIN)) continue;
402 ERR(module,"dosmod has failed to initialize\n");
403 if (lpDosTask->mm_name[0]!=0) unlink(lpDosTask->mm_name);
407 /* the child has now mmaped the temp file, it's now safe to unlink.
408 * do it here to avoid leaving a mess in /tmp if/when Wine crashes... */
409 if (lpDosTask->mm_name[0]!=0) unlink(lpDosTask->mm_name);
410 /* start simulated system timer */
411 MZ_InitTimer(lpDosTask,ret);
413 ERR(module,"dosmod version too old! Please install newer dosmod properly\n");
414 ERR(module,"If you don't, the new dosmod event handling system will not work\n");
416 /* all systems are now go */
419 close(lpDosTask->read_pipe);
420 close(lpDosTask->write_pipe);
421 /* put our pipes somewhere dosmod can find them */
422 dup2(write_fd[0],0); /* stdin */
423 dup2(x_fd,1); /* stdout */
425 SIGNAL_MaskAsyncEvents(FALSE);
426 /* now load dosmod */
427 /* check argv[0]-derived paths first, since the newest dosmod is most likely there
428 * (at least it was once for Andreas Mohr, so I decided to make it easier for him) */
429 fpath=strrchr(strcpy(path,Options.argv0),'/');
431 strcpy(fpath,"/dosmod");
432 execl(path,fname,farg,NULL);
433 strcpy(fpath,"/loader/dos/dosmod");
434 execl(path,fname,farg,NULL);
436 /* okay, it wasn't there, try in the path */
437 execlp("dosmod",fname,farg,NULL);
438 /* last desperate attempts: current directory */
439 execl("dosmod",fname,farg,NULL);
440 /* and, just for completeness... */
441 execl("loader/dos/dosmod",fname,farg,NULL);
442 /* if failure, exit */
443 ERR(module,"Failed to spawn dosmod, error=%s\n",strerror(errno));
449 BOOL MZ_CreateProcess( HFILE hFile, OFSTRUCT *ofs, LPCSTR cmdline, LPCSTR env,
450 LPSECURITY_ATTRIBUTES psa, LPSECURITY_ATTRIBUTES tsa,
451 BOOL inherit, LPSTARTUPINFOA startup,
452 LPPROCESS_INFORMATION info )
454 LPDOSTASK lpDosTask = NULL; /* keep gcc from complaining */
456 PDB *pdb = PROCESS_Current();
457 TDB *pTask = (TDB*)GlobalLock16( GetCurrentTask() );
458 NE_MODULE *pModule = pTask ? NE_GetPtr( pTask->hModule ) : NULL;
459 int alloc = !(pModule && pModule->dos_image);
461 if (alloc && (lpDosTask = calloc(1, sizeof(DOSTASK))) == NULL) {
462 SetLastError(ERROR_NOT_ENOUGH_MEMORY);
466 if ((!env)&&pdb) env = pdb->env_db->environ;
468 if ((hModule = MODULE_CreateDummyModule(ofs, NULL)) < 32) {
469 SetLastError(hModule);
472 lpDosTask->hModule = hModule;
474 pModule = (NE_MODULE *)GlobalLock16(hModule);
475 pModule->lpDosTask = lpDosTask;
477 lpDosTask->img=NULL; lpDosTask->mm_name[0]=0; lpDosTask->mm_fd=-1;
478 } else lpDosTask=pModule->lpDosTask;
479 if (!MZ_LoadImage( hFile, ofs, cmdline, env, lpDosTask, pModule )) {
481 if (lpDosTask->mm_name[0]!=0) {
482 if (lpDosTask->img!=NULL) munmap(lpDosTask->img,0x110000-START_OFFSET);
483 if (lpDosTask->mm_fd>=0) close(lpDosTask->mm_fd);
484 unlink(lpDosTask->mm_name);
486 if (lpDosTask->img!=NULL) VirtualFree(lpDosTask->img,0x110000,MEM_RELEASE);
491 pModule->dos_image = lpDosTask->img;
492 if (!MZ_InitTask( lpDosTask )) {
493 MZ_KillModule( lpDosTask );
494 /* FIXME: cleanup hModule */
495 SetLastError(ERROR_GEN_FAILURE);
498 inherit = TRUE; /* bad hack for inheriting the CreatePipe... */
499 if (!PROCESS_Create( pModule, cmdline, env, 0, 0,
500 psa, tsa, inherit, startup, info ))
506 void MZ_KillModule( LPDOSTASK lpDosTask )
508 DOSEVENT *event,*p_event;
509 DOSSYSTEM *sys,*p_sys;
511 TRACE(module,"killing DOS task\n");
512 if (lpDosTask->mm_name[0]!=0) {
513 munmap(lpDosTask->img,0x110000-START_OFFSET);
514 close(lpDosTask->mm_fd);
515 } else VirtualFree(lpDosTask->img,0x110000,MEM_RELEASE);
516 close(lpDosTask->read_pipe);
517 close(lpDosTask->write_pipe);
518 CloseHandle(lpDosTask->hReadPipe);
519 CloseHandle(lpDosTask->hXPipe);
520 kill(lpDosTask->task,SIGTERM);
521 /* free memory allocated for events and systems */
522 #define DFREE(var,pvar,svar) \
523 var = lpDosTask->svar; \
525 if (var->data) free(var->data); \
526 pvar = var->next; free(var); var = pvar; \
529 DFREE(event,p_event,pending)
530 DFREE(event,p_event,current)
536 /* FIXME: this seems to crash */
537 if (lpDosTask->dpmi_sel)
538 UnMapLS(PTR_SEG_OFF_TO_SEGPTR(lpDosTask->dpmi_sel,0));
542 #else /* !MZ_SUPPORTED */
544 BOOL MZ_CreateProcess( HFILE hFile, OFSTRUCT *ofs, LPCSTR cmdline, LPCSTR env,
545 LPSECURITY_ATTRIBUTES psa, LPSECURITY_ATTRIBUTES tsa,
546 BOOL inherit, LPSTARTUPINFOA startup,
547 LPPROCESS_INFORMATION info )
549 WARN(module,"DOS executables not supported on this architecture\n");
550 SetLastError(ERROR_BAD_FORMAT);