4 * Copyright 1995 Alexandre Julliard
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
22 #include "wine/port.h"
39 #include "wine/winbase16.h"
45 #include "wine/server.h"
46 #include "stackframe.h"
49 #include "kernel_private.h"
51 #include "wine/debug.h"
53 WINE_DEFAULT_DEBUG_CHANNEL(task);
54 WINE_DECLARE_DEBUG_CHANNEL(relay);
55 WINE_DECLARE_DEBUG_CHANNEL(toolhelp);
59 /* Segment containing MakeProcInstance() thunks */
62 WORD next; /* Selector of next segment */
63 WORD magic; /* Thunks signature */
65 WORD free; /* Head of the free list */
66 WORD thunks[4]; /* Each thunk is 4 words long */
71 #define THUNK_MAGIC ('P' | ('T' << 8))
73 /* Min. number of thunks allocated when creating a new segment */
76 #define TDB_MAGIC ('T' | ('D' << 8))
78 static THHOOK DefaultThhook;
79 THHOOK *pThhook = &DefaultThhook;
81 #define hFirstTask (pThhook->HeadTDB)
82 #define hLockedTask (pThhook->LockTDB)
84 static UINT16 nTaskCount = 0;
86 static HTASK16 initial_task;
88 /***********************************************************************
91 void TASK_InstallTHHook( THHOOK *pNewThhook )
93 THHOOK *pOldThhook = pThhook;
95 pThhook = pNewThhook? pNewThhook : &DefaultThhook;
97 *pThhook = *pOldThhook;
100 /***********************************************************************
103 static TDB *TASK_GetPtr( HTASK16 hTask )
105 return GlobalLock16( hTask );
109 /***********************************************************************
112 TDB *TASK_GetCurrent(void)
114 return TASK_GetPtr( GetCurrentTask() );
118 /***********************************************************************
121 static void TASK_LinkTask( HTASK16 hTask )
126 if (!(pTask = TASK_GetPtr( hTask ))) return;
127 prevTask = &hFirstTask;
130 TDB *prevTaskPtr = TASK_GetPtr( *prevTask );
131 if (prevTaskPtr->priority >= pTask->priority) break;
132 prevTask = &prevTaskPtr->hNext;
134 pTask->hNext = *prevTask;
140 /***********************************************************************
143 static void TASK_UnlinkTask( HTASK16 hTask )
148 prevTask = &hFirstTask;
149 while (*prevTask && (*prevTask != hTask))
151 pTask = TASK_GetPtr( *prevTask );
152 prevTask = &pTask->hNext;
156 pTask = TASK_GetPtr( *prevTask );
157 *prevTask = pTask->hNext;
164 /***********************************************************************
167 * Create a thunk free-list in segment 'handle', starting from offset 'offset'
168 * and containing 'count' entries.
170 static void TASK_CreateThunks( HGLOBAL16 handle, WORD offset, WORD count )
176 pThunk = (THUNKS *)((BYTE *)GlobalLock16( handle ) + offset);
178 pThunk->magic = THUNK_MAGIC;
179 pThunk->free = (int)&pThunk->thunks - (int)pThunk;
181 for (i = 0; i < count-1; i++)
183 free += 8; /* Offset of next thunk */
184 pThunk->thunks[4*i] = free;
186 pThunk->thunks[4*i] = 0; /* Last thunk */
190 /***********************************************************************
193 * Allocate a thunk for MakeProcInstance().
195 static SEGPTR TASK_AllocThunk(void)
201 if (!(pTask = TASK_GetCurrent())) return 0;
202 sel = pTask->hCSAlias;
203 pThunk = (THUNKS *)&pTask->thunks;
204 base = (char *)pThunk - (char *)pTask;
205 while (!pThunk->free)
208 if (!sel) /* Allocate a new segment */
210 sel = GLOBAL_Alloc( GMEM_FIXED, sizeof(THUNKS) + (MIN_THUNKS-1)*8,
211 pTask->hPDB, WINE_LDT_FLAGS_CODE );
212 if (!sel) return (SEGPTR)0;
213 TASK_CreateThunks( sel, 0, MIN_THUNKS );
216 pThunk = (THUNKS *)GlobalLock16( sel );
219 base += pThunk->free;
220 pThunk->free = *(WORD *)((BYTE *)pThunk + pThunk->free);
221 return MAKESEGPTR( sel, base );
225 /***********************************************************************
228 * Free a MakeProcInstance() thunk.
230 static BOOL TASK_FreeThunk( SEGPTR thunk )
236 if (!(pTask = TASK_GetCurrent())) return 0;
237 sel = pTask->hCSAlias;
238 pThunk = (THUNKS *)&pTask->thunks;
239 base = (char *)pThunk - (char *)pTask;
240 while (sel && (sel != HIWORD(thunk)))
243 pThunk = (THUNKS *)GlobalLock16( sel );
246 if (!sel) return FALSE;
247 *(WORD *)((BYTE *)pThunk + LOWORD(thunk) - base) = pThunk->free;
248 pThunk->free = LOWORD(thunk) - base;
253 /***********************************************************************
256 * NOTE: This routine might be called by a Win32 thread. Thus, we need
257 * to be careful to protect global data structures. We do this
258 * by entering the Win16Lock while linking the task into the
261 static TDB *TASK_Create( NE_MODULE *pModule, UINT16 cmdShow, TEB *teb, LPCSTR cmdline, BYTE len )
266 HMODULE16 hModule = pModule ? pModule->self : 0;
268 /* Allocate the task structure */
270 hTask = GlobalAlloc16( GMEM_FIXED | GMEM_ZEROINIT, sizeof(TDB) );
271 if (!hTask) return NULL;
272 pTask = TASK_GetPtr( hTask );
273 FarSetOwner16( hTask, hModule );
275 /* Fill the task structure */
277 pTask->hSelf = hTask;
279 if (teb && teb->tibflags & TEBF_WIN32)
281 pTask->flags |= TDBF_WIN32;
282 pTask->hInstance = hModule;
283 pTask->hPrevInstance = 0;
284 /* NOTE: for 16-bit tasks, the instance handles are updated later on
288 pTask->version = pModule ? pModule->expected_version : 0x0400;
289 pTask->hModule = hModule;
290 pTask->hParent = GetCurrentTask();
291 pTask->magic = TDB_MAGIC;
292 pTask->nCmdShow = cmdShow;
294 pTask->curdrive = DRIVE_GetCurrentDrive() | 0x80;
295 strcpy( pTask->curdir, "\\" );
296 WideCharToMultiByte(CP_ACP, 0, DRIVE_GetDosCwd(DRIVE_GetCurrentDrive()), -1,
297 pTask->curdir + 1, sizeof(pTask->curdir) - 1, NULL, NULL);
298 pTask->curdir[sizeof(pTask->curdir) - 1] = 0; /* ensure 0 termination */
300 /* Create the thunks block */
302 TASK_CreateThunks( hTask, (char *)&pTask->thunks - (char *)pTask, 7 );
304 /* Copy the module name */
309 GetModuleName16( hModule, name, sizeof(name) );
310 strncpy( pTask->module_name, name, sizeof(pTask->module_name) );
311 pTask->compat_flags = GetProfileIntA( "Compatibility", name, 0 );
314 /* Allocate a selector for the PDB */
316 pTask->hPDB = GLOBAL_CreateBlock( GMEM_FIXED, &pTask->pdb, sizeof(PDB16),
317 hModule, WINE_LDT_FLAGS_DATA );
321 pTask->pdb.int20 = 0x20cd;
322 pTask->pdb.dispatcher[0] = 0x9a; /* ljmp */
323 proc = GetProcAddress16( GetModuleHandle16("KERNEL"), "DOS3Call" );
324 memcpy( &pTask->pdb.dispatcher[1], &proc, sizeof(proc) );
325 pTask->pdb.savedint22 = 0;
326 pTask->pdb.savedint23 = 0;
327 pTask->pdb.savedint24 = 0;
328 pTask->pdb.fileHandlesPtr =
329 MAKESEGPTR( GlobalHandleToSel16(pTask->hPDB), (int)&((PDB16 *)0)->fileHandles );
330 pTask->pdb.hFileHandles = 0;
331 memset( pTask->pdb.fileHandles, 0xff, sizeof(pTask->pdb.fileHandles) );
332 /* FIXME: should we make a copy of the environment? */
333 pTask->pdb.environment = SELECTOROF(GetDOSEnvironment16());
334 pTask->pdb.nbFiles = 20;
336 /* Fill the command line */
340 cmdline = GetCommandLineA();
341 /* remove the first word (program name) */
343 if (!(cmdline = strchr( cmdline+1, '"' ))) cmdline = GetCommandLineA();
344 while (*cmdline && (*cmdline != ' ') && (*cmdline != '\t')) cmdline++;
345 while ((*cmdline == ' ') || (*cmdline == '\t')) cmdline++;
346 len = strlen(cmdline);
348 if (len >= sizeof(pTask->pdb.cmdLine)) len = sizeof(pTask->pdb.cmdLine)-1;
349 pTask->pdb.cmdLine[0] = len;
350 memcpy( pTask->pdb.cmdLine + 1, cmdline, len );
351 /* pTask->pdb.cmdLine[len+1] = 0; */
353 TRACE("cmdline='%.*s' task=%04x\n", len, cmdline, hTask );
355 /* Allocate a code segment alias for the TDB */
357 pTask->hCSAlias = GLOBAL_CreateBlock( GMEM_FIXED, (void *)pTask,
358 sizeof(TDB), pTask->hPDB, WINE_LDT_FLAGS_CODE );
360 /* Default DTA overwrites command line */
362 pTask->dta = MAKESEGPTR( pTask->hPDB, (int)&pTask->pdb.cmdLine - (int)&pTask->pdb );
364 /* Create scheduler event for 16-bit tasks */
366 if ( !(pTask->flags & TDBF_WIN32) )
367 NtCreateEvent( &pTask->hEvent, EVENT_ALL_ACCESS, NULL, TRUE, FALSE );
369 /* Enter task handle into thread */
371 if (teb) teb->htask16 = hTask;
372 if (!initial_task) initial_task = hTask;
378 /***********************************************************************
381 static void TASK_DeleteTask( HTASK16 hTask )
386 if (!(pTask = TASK_GetPtr( hTask ))) return;
389 pTask->magic = 0xdead; /* invalidate signature */
391 /* Free the selector aliases */
393 GLOBAL_FreeBlock( pTask->hCSAlias );
394 GLOBAL_FreeBlock( pTask->hPDB );
396 /* Free the task module */
398 FreeModule16( pTask->hModule );
400 /* Free the task structure itself */
402 GlobalFree16( hTask );
404 /* Free all memory used by this task (including the 32-bit stack, */
405 /* the environment block and the thunk segments). */
407 GlobalFreeAll16( hPDB );
411 /***********************************************************************
412 * TASK_CreateMainTask
414 * Create a task for the main (32-bit) process.
416 void TASK_CreateMainTask(void)
419 STARTUPINFOA startup_info;
420 UINT cmdShow = 1; /* SW_SHOWNORMAL but we don't want to include winuser.h here */
422 GetStartupInfoA( &startup_info );
423 if (startup_info.dwFlags & STARTF_USESHOWWINDOW) cmdShow = startup_info.wShowWindow;
424 pTask = TASK_Create( NULL, cmdShow, NtCurrentTeb(), NULL, 0 );
427 ERR("could not create task for main process\n");
431 /* Add the task to the linked list */
432 /* (no need to get the win16 lock, we are the only thread at this point) */
433 TASK_LinkTask( pTask->hSelf );
437 /* startup routine for a new 16-bit thread */
438 static DWORD CALLBACK task_start( TDB *pTask )
442 NtCurrentTeb()->tibflags &= ~TEBF_WIN32;
443 NtCurrentTeb()->htask16 = pTask->hSelf;
446 TASK_LinkTask( pTask->hSelf );
447 pTask->teb = NtCurrentTeb();
448 ret = NE_StartTask();
454 /***********************************************************************
457 * Spawn a new 16-bit task.
459 HTASK16 TASK_SpawnTask( NE_MODULE *pModule, WORD cmdShow,
460 LPCSTR cmdline, BYTE len, HANDLE *hThread )
464 if (!(pTask = TASK_Create( pModule, cmdShow, NULL, cmdline, len ))) return 0;
465 if (!(*hThread = CreateThread( NULL, 0, (LPTHREAD_START_ROUTINE)task_start, pTask, 0, NULL )))
467 TASK_DeleteTask( pTask->hSelf );
474 /***********************************************************************
475 * TASK_GetTaskFromThread
477 HTASK16 TASK_GetTaskFromThread( DWORD thread )
479 TDB *p = TASK_GetPtr( hFirstTask );
482 if (p->teb->ClientId.UniqueThread == (HANDLE)thread) return p->hSelf;
483 p = TASK_GetPtr( p->hNext );
489 /***********************************************************************
490 * TASK_CallTaskSignalProc
492 static void TASK_CallTaskSignalProc( UINT16 uCode, HANDLE16 hTaskOrModule )
495 TDB *pTask = TASK_GetCurrent();
497 if ( !pTask || !pTask->userhandler ) return;
499 args[4] = hTaskOrModule;
502 args[1] = pTask->hInstance;
503 args[0] = pTask->hQueue;
504 WOWCallback16Ex( (DWORD)pTask->userhandler, WCB16_PASCAL, sizeof(args), args, NULL );
508 /***********************************************************************
511 void TASK_ExitTask(void)
516 /* Enter the Win16Lock to protect global data structures */
519 pTask = TASK_GetCurrent();
526 TRACE("Killing task %04x\n", pTask->hSelf );
528 /* Perform USER cleanup */
530 TASK_CallTaskSignalProc( USIG16_TERMINATION, pTask->hSelf );
532 /* Remove the task from the list to be sure we never switch back to it */
533 TASK_UnlinkTask( pTask->hSelf );
535 if (!nTaskCount || (nTaskCount == 1 && hFirstTask == initial_task))
537 TRACE("this is the last task, exiting\n" );
543 if ( hLockedTask == pTask->hSelf )
546 TASK_DeleteTask( pTask->hSelf );
548 /* ... and completely release the Win16Lock, just in case. */
549 ReleaseThunkLock( &lockCount );
553 /***********************************************************************
554 * ExitKernel (KERNEL.2)
556 * Clean-up everything and exit the Wine process.
558 void WINAPI ExitKernel16(void)
560 WriteOutProfiles16();
561 TerminateProcess( GetCurrentProcess(), 0 );
565 /***********************************************************************
566 * InitTask (KERNEL.91)
568 * Called by the application startup code.
570 void WINAPI InitTask16( CONTEXT86 *context )
573 INSTANCEDATA *pinstance;
577 if (!(pTask = TASK_GetCurrent())) return;
579 /* Note: we need to trust that BX/CX contain the stack/heap sizes,
580 as some apps, notably Visual Basic apps, *modify* the heap/stack
581 size of the instance data segment before calling InitTask() */
583 /* Initialize the INSTANCEDATA structure */
584 pinstance = MapSL( MAKESEGPTR(CURRENT_DS, 0) );
585 pinstance->stackmin = OFFSETOF( NtCurrentTeb()->cur_stack ) + sizeof( STACK16FRAME );
586 pinstance->stackbottom = pinstance->stackmin; /* yup, that's right. Confused me too. */
587 pinstance->stacktop = ( pinstance->stackmin > LOWORD(context->Ebx) ?
588 pinstance->stackmin - LOWORD(context->Ebx) : 0 ) + 150;
590 /* Initialize the local heap */
591 if (LOWORD(context->Ecx))
592 LocalInit16( GlobalHandleToSel16(pTask->hInstance), 0, LOWORD(context->Ecx) );
594 /* Initialize implicitly loaded DLLs */
595 NE_InitializeDLLs( pTask->hModule );
596 NE_DllProcessAttach( pTask->hModule );
598 /* Registers on return are:
599 * ax 1 if OK, 0 on error
600 * cx stack limit in bytes
601 * dx cmdShow parameter
602 * si instance handle of the previous instance
603 * di instance handle of the new task
604 * es:bx pointer to command line inside PSP
606 * 0 (=%bp) is pushed on the stack
608 ptr = stack16_push( sizeof(WORD) );
609 *(WORD *)MapSL(ptr) = 0;
614 if (!pTask->pdb.cmdLine[0]) context->Ebx = 0x80;
617 LPBYTE p = &pTask->pdb.cmdLine[1];
618 while ((*p == ' ') || (*p == '\t')) p++;
619 context->Ebx = 0x80 + (p - pTask->pdb.cmdLine);
621 context->Ecx = pinstance->stacktop;
622 context->Edx = pTask->nCmdShow;
623 context->Esi = (DWORD)pTask->hPrevInstance;
624 context->Edi = (DWORD)pTask->hInstance;
625 context->SegEs = (WORD)pTask->hPDB;
629 /***********************************************************************
630 * WaitEvent (KERNEL.30)
632 BOOL16 WINAPI WaitEvent16( HTASK16 hTask )
636 if (!hTask) hTask = GetCurrentTask();
637 pTask = TASK_GetPtr( hTask );
639 if (pTask->flags & TDBF_WIN32)
641 FIXME("called for Win32 thread (%04lx)!\n", GetCurrentThreadId());
645 if (pTask->nEvents > 0)
651 if (pTask->teb == NtCurrentTeb())
655 NtResetEvent( pTask->hEvent, NULL );
656 ReleaseThunkLock( &lockCount );
657 SYSLEVEL_CheckNotLevel( 1 );
658 WaitForSingleObject( pTask->hEvent, INFINITE );
659 RestoreThunkLock( lockCount );
660 if (pTask->nEvents > 0) pTask->nEvents--;
662 else FIXME("for other task %04x cur=%04x\n",pTask->hSelf,GetCurrentTask());
668 /***********************************************************************
669 * PostEvent (KERNEL.31)
671 void WINAPI PostEvent16( HTASK16 hTask )
675 if (!hTask) hTask = GetCurrentTask();
676 if (!(pTask = TASK_GetPtr( hTask ))) return;
678 if (pTask->flags & TDBF_WIN32)
680 FIXME("called for Win32 thread (%04lx)!\n", (DWORD)pTask->teb->ClientId.UniqueThread );
686 if (pTask->nEvents == 1) NtSetEvent( pTask->hEvent, NULL );
690 /***********************************************************************
691 * SetPriority (KERNEL.32)
693 void WINAPI SetPriority16( HTASK16 hTask, INT16 delta )
698 if (!hTask) hTask = GetCurrentTask();
699 if (!(pTask = TASK_GetPtr( hTask ))) return;
700 newpriority = pTask->priority + delta;
701 if (newpriority < -32) newpriority = -32;
702 else if (newpriority > 15) newpriority = 15;
704 pTask->priority = newpriority + 1;
705 TASK_UnlinkTask( pTask->hSelf );
706 TASK_LinkTask( pTask->hSelf );
711 /***********************************************************************
712 * LockCurrentTask (KERNEL.33)
714 HTASK16 WINAPI LockCurrentTask16( BOOL16 bLock )
716 if (bLock) hLockedTask = GetCurrentTask();
717 else hLockedTask = 0;
722 /***********************************************************************
723 * IsTaskLocked (KERNEL.122)
725 HTASK16 WINAPI IsTaskLocked16(void)
731 /***********************************************************************
732 * OldYield (KERNEL.117)
734 void WINAPI OldYield16(void)
738 ReleaseThunkLock(&count);
739 RestoreThunkLock(count);
742 /***********************************************************************
743 * WIN32_OldYield (KERNEL.447)
745 void WINAPI WIN32_OldYield16(void)
749 ReleaseThunkLock(&count);
750 RestoreThunkLock(count);
753 /***********************************************************************
754 * DirectedYield (KERNEL.150)
756 void WINAPI DirectedYield16( HTASK16 hTask )
761 /***********************************************************************
764 void WINAPI Yield16(void)
766 TDB *pCurTask = TASK_GetCurrent();
768 if (pCurTask && pCurTask->hQueue)
770 HMODULE mod = GetModuleHandleA( "user32.dll" );
773 FARPROC proc = GetProcAddress( mod, "UserYield16" );
784 /***********************************************************************
785 * KERNEL_490 (KERNEL.490)
787 HTASK16 WINAPI KERNEL_490( HTASK16 someTask )
789 if ( !someTask ) return 0;
791 FIXME("(%04x): stub\n", someTask );
795 /***********************************************************************
796 * MakeProcInstance (KERNEL.51)
798 FARPROC16 WINAPI MakeProcInstance16( FARPROC16 func, HANDLE16 hInstance )
802 WORD hInstanceSelector;
804 hInstanceSelector = GlobalHandleToSel16(hInstance);
806 TRACE("(%08lx, %04x);\n", (DWORD)func, hInstance);
809 /* Win95 actually protects via SEH, but this is better for debugging */
810 WARN("Ouch ! Called with invalid func 0x%08lx !\n", (DWORD)func);
814 if ( (GlobalHandleToSel16(CURRENT_DS) != hInstanceSelector)
816 && (hInstance != 0xffff) )
818 /* calling MPI with a foreign DSEG is invalid ! */
819 WARN("Problem with hInstance? Got %04x, using %04x instead\n",
820 hInstance,CURRENT_DS);
823 /* Always use the DSEG that MPI was entered with.
824 * We used to set hInstance to GetTaskDS16(), but this should be wrong
825 * as CURRENT_DS provides the DSEG value we need.
826 * ("calling" DS, *not* "task" DS !) */
827 hInstanceSelector = CURRENT_DS;
828 hInstance = GlobalHandle16(hInstanceSelector);
830 /* no thunking for DLLs */
831 if (NE_GetPtr(FarGetOwner16(hInstance))->flags & NE_FFLAGS_LIBMODULE)
834 thunkaddr = TASK_AllocThunk();
835 if (!thunkaddr) return (FARPROC16)0;
836 thunk = MapSL( thunkaddr );
837 lfunc = MapSL( (SEGPTR)func );
839 TRACE("(%08lx,%04x): got thunk %08lx\n",
840 (DWORD)func, hInstance, (DWORD)thunkaddr );
841 if (((lfunc[0]==0x8c) && (lfunc[1]==0xd8)) || /* movw %ds, %ax */
842 ((lfunc[0]==0x1e) && (lfunc[1]==0x58)) /* pushw %ds, popw %ax */
844 WARN("This was the (in)famous \"thunk useless\" warning. We thought we have to overwrite with nop;nop;, but this isn't true.\n");
847 *thunk++ = 0xb8; /* movw instance, %ax */
848 *thunk++ = (BYTE)(hInstanceSelector & 0xff);
849 *thunk++ = (BYTE)(hInstanceSelector >> 8);
850 *thunk++ = 0xea; /* ljmp func */
851 *(DWORD *)thunk = (DWORD)func;
852 return (FARPROC16)thunkaddr;
853 /* CX reg indicates if thunkaddr != NULL, implement if needed */
857 /***********************************************************************
858 * FreeProcInstance (KERNEL.52)
860 void WINAPI FreeProcInstance16( FARPROC16 func )
862 TRACE("(%08lx)\n", (DWORD)func );
863 TASK_FreeThunk( (SEGPTR)func );
866 /**********************************************************************
867 * TASK_GetCodeSegment
869 * Helper function for GetCodeHandle/GetCodeInfo: Retrieve the module
870 * and logical segment number of a given code segment.
872 * 'proc' either *is* already a pair of module handle and segment number,
873 * in which case there's nothing to do. Otherwise, it is a pointer to
874 * a function, and we need to retrieve the code segment. If the pointer
875 * happens to point to a thunk, we'll retrieve info about the code segment
876 * where the function pointed to by the thunk resides, not the thunk itself.
878 * FIXME: if 'proc' is a SNOOP16 return stub, we should retrieve info about
879 * the function the snoop code will return to ...
882 static BOOL TASK_GetCodeSegment( FARPROC16 proc, NE_MODULE **ppModule,
883 SEGTABLEENTRY **ppSeg, int *pSegNr )
885 NE_MODULE *pModule = NULL;
886 SEGTABLEENTRY *pSeg = NULL;
889 /* Try pair of module handle / segment number */
890 pModule = (NE_MODULE *) GlobalLock16( HIWORD( proc ) );
891 if ( pModule && pModule->magic == IMAGE_OS2_SIGNATURE )
893 segNr = LOWORD( proc );
894 if ( segNr && segNr <= pModule->seg_count )
895 pSeg = NE_SEG_TABLE( pModule ) + segNr-1;
898 /* Try thunk or function */
901 BYTE *thunk = MapSL( (SEGPTR)proc );
904 if ((thunk[0] == 0xb8) && (thunk[3] == 0xea))
905 selector = thunk[6] + (thunk[7] << 8);
907 selector = HIWORD( proc );
909 pModule = NE_GetPtr( GlobalHandle16( selector ) );
910 pSeg = pModule? NE_SEG_TABLE( pModule ) : NULL;
913 for ( segNr = 1; segNr <= pModule->seg_count; segNr++, pSeg++ )
914 if ( GlobalHandleToSel16(pSeg->hSeg) == selector )
917 if ( pModule && segNr > pModule->seg_count )
921 /* Abort if segment not found */
923 if ( !pModule || !pSeg )
926 /* Return segment data */
928 if ( ppModule ) *ppModule = pModule;
929 if ( ppSeg ) *ppSeg = pSeg;
930 if ( pSegNr ) *pSegNr = segNr;
935 /**********************************************************************
936 * GetCodeHandle (KERNEL.93)
938 HANDLE16 WINAPI GetCodeHandle16( FARPROC16 proc )
942 if ( !TASK_GetCodeSegment( proc, NULL, &pSeg, NULL ) )
948 /**********************************************************************
949 * GetCodeInfo (KERNEL.104)
951 BOOL16 WINAPI GetCodeInfo16( FARPROC16 proc, SEGINFO *segInfo )
957 if ( !TASK_GetCodeSegment( proc, &pModule, &pSeg, &segNr ) )
960 /* Fill in segment information */
962 segInfo->offSegment = pSeg->filepos;
963 segInfo->cbSegment = pSeg->size;
964 segInfo->flags = pSeg->flags;
965 segInfo->cbAlloc = pSeg->minsize;
966 segInfo->h = pSeg->hSeg;
967 segInfo->alignShift = pModule->alignment;
969 if ( segNr == pModule->dgroup )
970 segInfo->cbAlloc += pModule->heap_size + pModule->stack_size;
972 /* Return module handle in %es */
974 CURRENT_STACK16->es = GlobalHandleToSel16( pModule->self );
980 /**********************************************************************
981 * DefineHandleTable (KERNEL.94)
983 BOOL16 WINAPI DefineHandleTable16( WORD wOffset )
985 FIXME("(%04x): stub ?\n", wOffset);
990 /***********************************************************************
991 * SetTaskQueue (KERNEL.34)
993 HQUEUE16 WINAPI SetTaskQueue16( HTASK16 hTask, HQUEUE16 hQueue )
998 if (!hTask) hTask = GetCurrentTask();
999 if (!(pTask = TASK_GetPtr( hTask ))) return 0;
1001 hPrev = pTask->hQueue;
1002 pTask->hQueue = hQueue;
1008 /***********************************************************************
1009 * GetTaskQueue (KERNEL.35)
1011 HQUEUE16 WINAPI GetTaskQueue16( HTASK16 hTask )
1015 if (!hTask) hTask = GetCurrentTask();
1016 if (!(pTask = TASK_GetPtr( hTask ))) return 0;
1017 return pTask->hQueue;
1020 /***********************************************************************
1021 * SetThreadQueue (KERNEL.463)
1023 HQUEUE16 WINAPI SetThreadQueue16( DWORD thread, HQUEUE16 hQueue )
1025 HQUEUE16 oldQueue = NtCurrentTeb()->queue;
1027 if (thread && thread != GetCurrentThreadId())
1029 FIXME( "not supported on other thread %04lx\n", thread );
1032 NtCurrentTeb()->queue = hQueue;
1033 if ( GetTaskQueue16( NtCurrentTeb()->htask16 ) == oldQueue )
1034 SetTaskQueue16( NtCurrentTeb()->htask16, hQueue );
1038 /***********************************************************************
1039 * GetThreadQueue (KERNEL.464)
1041 HQUEUE16 WINAPI GetThreadQueue16( DWORD thread )
1043 if (thread && thread != GetCurrentThreadId())
1045 FIXME( "not supported on other thread %04lx\n", thread );
1048 return NtCurrentTeb()->queue;
1051 /***********************************************************************
1052 * SetFastQueue (KERNEL.624)
1054 VOID WINAPI SetFastQueue16( DWORD thread, HQUEUE16 hQueue )
1056 if (!thread || thread == GetCurrentThreadId())
1057 NtCurrentTeb()->queue = hQueue;
1059 FIXME( "not supported on other thread %04lx\n", thread );
1062 /***********************************************************************
1063 * GetFastQueue (KERNEL.625)
1065 HQUEUE16 WINAPI GetFastQueue16( void )
1067 HQUEUE16 ret = NtCurrentTeb()->queue;
1069 if (!ret) FIXME("(): should initialize thread-local queue, expect failure!\n" );
1073 /***********************************************************************
1074 * SwitchStackTo (KERNEL.108)
1076 void WINAPI SwitchStackTo16( WORD seg, WORD ptr, WORD top )
1078 STACK16FRAME *oldFrame, *newFrame;
1079 INSTANCEDATA *pData;
1082 if (!(pData = (INSTANCEDATA *)GlobalLock16( seg ))) return;
1083 TRACE("old=%04x:%04x new=%04x:%04x\n",
1084 SELECTOROF( NtCurrentTeb()->cur_stack ),
1085 OFFSETOF( NtCurrentTeb()->cur_stack ), seg, ptr );
1087 /* Save the old stack */
1089 oldFrame = CURRENT_STACK16;
1090 /* pop frame + args and push bp */
1091 pData->old_ss_sp = NtCurrentTeb()->cur_stack + sizeof(STACK16FRAME)
1093 *(WORD *)MapSL(pData->old_ss_sp) = oldFrame->bp;
1094 pData->stacktop = top;
1095 pData->stackmin = ptr;
1096 pData->stackbottom = ptr;
1098 /* Switch to the new stack */
1100 /* Note: we need to take the 3 arguments into account; otherwise,
1101 * the stack will underflow upon return from this function.
1103 copySize = oldFrame->bp - OFFSETOF(pData->old_ss_sp);
1104 copySize += 3 * sizeof(WORD) + sizeof(STACK16FRAME);
1105 NtCurrentTeb()->cur_stack = MAKESEGPTR( seg, ptr - copySize );
1106 newFrame = CURRENT_STACK16;
1108 /* Copy the stack frame and the local variables to the new stack */
1110 memmove( newFrame, oldFrame, copySize );
1112 *(WORD *)MapSL( MAKESEGPTR( seg, ptr ) ) = 0; /* clear previous bp */
1116 /***********************************************************************
1117 * SwitchStackBack (KERNEL.109)
1119 void WINAPI SwitchStackBack16( CONTEXT86 *context )
1121 STACK16FRAME *oldFrame, *newFrame;
1122 INSTANCEDATA *pData;
1124 if (!(pData = (INSTANCEDATA *)GlobalLock16(SELECTOROF(NtCurrentTeb()->cur_stack))))
1126 if (!pData->old_ss_sp)
1128 WARN("No previous SwitchStackTo\n" );
1131 TRACE("restoring stack %04x:%04x\n",
1132 SELECTOROF(pData->old_ss_sp), OFFSETOF(pData->old_ss_sp) );
1134 oldFrame = CURRENT_STACK16;
1136 /* Pop bp from the previous stack */
1138 context->Ebp = (context->Ebp & ~0xffff) | *(WORD *)MapSL(pData->old_ss_sp);
1139 pData->old_ss_sp += sizeof(WORD);
1141 /* Switch back to the old stack */
1143 NtCurrentTeb()->cur_stack = pData->old_ss_sp - sizeof(STACK16FRAME);
1144 context->SegSs = SELECTOROF(pData->old_ss_sp);
1145 context->Esp = OFFSETOF(pData->old_ss_sp) - sizeof(DWORD); /*ret addr*/
1146 pData->old_ss_sp = 0;
1148 /* Build a stack frame for the return */
1150 newFrame = CURRENT_STACK16;
1151 newFrame->frame32 = oldFrame->frame32;
1152 newFrame->module_cs = oldFrame->module_cs;
1153 newFrame->callfrom_ip = oldFrame->callfrom_ip;
1154 newFrame->entry_ip = oldFrame->entry_ip;
1158 /***********************************************************************
1159 * GetTaskQueueDS (KERNEL.118)
1161 void WINAPI GetTaskQueueDS16(void)
1163 CURRENT_STACK16->ds = GlobalHandleToSel16( GetTaskQueue16(0) );
1167 /***********************************************************************
1168 * GetTaskQueueES (KERNEL.119)
1170 void WINAPI GetTaskQueueES16(void)
1172 CURRENT_STACK16->es = GlobalHandleToSel16( GetTaskQueue16(0) );
1176 /***********************************************************************
1177 * GetCurrentTask (KERNEL32.@)
1179 HTASK16 WINAPI GetCurrentTask(void)
1181 return NtCurrentTeb()->htask16;
1184 /***********************************************************************
1185 * GetCurrentTask (KERNEL.36)
1187 DWORD WINAPI WIN16_GetCurrentTask(void)
1189 /* This is the version used by relay code; the first task is */
1190 /* returned in the high word of the result */
1191 return MAKELONG( GetCurrentTask(), hFirstTask );
1195 /***********************************************************************
1196 * GetCurrentPDB (KERNEL.37)
1198 * UNDOC: returns PSP of KERNEL in high word
1200 DWORD WINAPI GetCurrentPDB16(void)
1204 if (!(pTask = TASK_GetCurrent())) return 0;
1205 return MAKELONG(pTask->hPDB, 0); /* FIXME */
1209 /***********************************************************************
1210 * GetCurPID (KERNEL.157)
1212 DWORD WINAPI GetCurPID16( DWORD unused )
1218 /***********************************************************************
1219 * GetInstanceData (KERNEL.54)
1221 INT16 WINAPI GetInstanceData16( HINSTANCE16 instance, WORD buffer, INT16 len )
1223 char *ptr = (char *)GlobalLock16( instance );
1224 if (!ptr || !len) return 0;
1225 if ((int)buffer + len >= 0x10000) len = 0x10000 - buffer;
1226 memcpy( (char *)GlobalLock16(CURRENT_DS) + buffer, ptr + buffer, len );
1231 /***********************************************************************
1232 * GetExeVersion (KERNEL.105)
1234 WORD WINAPI GetExeVersion16(void)
1238 if (!(pTask = TASK_GetCurrent())) return 0;
1239 return pTask->version;
1243 /***********************************************************************
1244 * SetErrorMode (KERNEL.107)
1246 UINT16 WINAPI SetErrorMode16( UINT16 mode )
1249 if (!(pTask = TASK_GetCurrent())) return 0;
1250 pTask->error_mode = mode;
1251 return SetErrorMode( mode );
1255 /***********************************************************************
1256 * GetNumTasks (KERNEL.152)
1258 UINT16 WINAPI GetNumTasks16(void)
1264 /***********************************************************************
1265 * GetTaskDS (KERNEL.155)
1267 * Note: this function apparently returns a DWORD with LOWORD == HIWORD.
1268 * I don't think we need to bother with this.
1270 HINSTANCE16 WINAPI GetTaskDS16(void)
1274 if (!(pTask = TASK_GetCurrent())) return 0;
1275 return GlobalHandleToSel16(pTask->hInstance);
1278 /***********************************************************************
1279 * GetDummyModuleHandleDS (KERNEL.602)
1281 WORD WINAPI GetDummyModuleHandleDS16(void)
1286 if (!(pTask = TASK_GetCurrent())) return 0;
1287 if (!(pTask->flags & TDBF_WIN32)) return 0;
1288 selector = GlobalHandleToSel16( pTask->hModule );
1289 CURRENT_DS = selector;
1293 /***********************************************************************
1294 * IsTask (KERNEL.320)
1296 BOOL16 WINAPI IsTask16( HTASK16 hTask )
1300 if (!(pTask = TASK_GetPtr( hTask ))) return FALSE;
1301 if (GlobalSize16( hTask ) < sizeof(TDB)) return FALSE;
1302 return (pTask->magic == TDB_MAGIC);
1306 /***********************************************************************
1307 * IsWinOldApTask (KERNEL.158)
1309 BOOL16 WINAPI IsWinOldApTask16( HTASK16 hTask )
1311 /* should return bit 0 of byte 0x48 in PSP */
1315 /***********************************************************************
1316 * SetTaskSignalProc (KERNEL.38)
1318 FARPROC16 WINAPI SetTaskSignalProc( HTASK16 hTask, FARPROC16 proc )
1323 if (!hTask) hTask = GetCurrentTask();
1324 if (!(pTask = TASK_GetPtr( hTask ))) return NULL;
1325 oldProc = pTask->userhandler;
1326 pTask->userhandler = proc;
1330 /***********************************************************************
1331 * SetSigHandler (KERNEL.140)
1333 WORD WINAPI SetSigHandler16( FARPROC16 newhandler, FARPROC16* oldhandler,
1334 UINT16 *oldmode, UINT16 newmode, UINT16 flag )
1336 FIXME("(%p,%p,%p,%d,%d), unimplemented.\n",
1337 newhandler,oldhandler,oldmode,newmode,flag );
1339 if (flag != 1) return 0;
1340 if (!newmode) newhandler = NULL; /* Default handler */
1345 if (!(pTask = TASK_GetCurrent())) return 0;
1346 if (oldmode) *oldmode = pTask->signal_flags;
1347 pTask->signal_flags = newmode;
1348 if (oldhandler) *oldhandler = pTask->sighandler;
1349 pTask->sighandler = newhandler;
1355 /***********************************************************************
1356 * GlobalNotify (KERNEL.154)
1358 * Note that GlobalNotify does _not_ return the old NotifyProc
1359 * -- contrary to LocalNotify !!
1361 VOID WINAPI GlobalNotify16( FARPROC16 proc )
1365 if (!(pTask = TASK_GetCurrent())) return;
1366 pTask->discardhandler = proc;
1370 /***********************************************************************
1373 static inline HMODULE16 GetExePtrHelper( HANDLE16 handle, HTASK16 *hTask )
1378 /* Check for module handle */
1380 if (!(ptr = GlobalLock16( handle ))) return 0;
1381 if (((NE_MODULE *)ptr)->magic == IMAGE_OS2_SIGNATURE) return handle;
1383 /* Search for this handle inside all tasks */
1385 *hTask = hFirstTask;
1388 TDB *pTask = TASK_GetPtr( *hTask );
1389 if ((*hTask == handle) ||
1390 (pTask->hInstance == handle) ||
1391 (pTask->hQueue == handle) ||
1392 (pTask->hPDB == handle)) return pTask->hModule;
1393 *hTask = pTask->hNext;
1396 /* Check the owner for module handle */
1398 owner = FarGetOwner16( handle );
1399 if (!(ptr = GlobalLock16( owner ))) return 0;
1400 if (((NE_MODULE *)ptr)->magic == IMAGE_OS2_SIGNATURE) return owner;
1402 /* Search for the owner inside all tasks */
1404 *hTask = hFirstTask;
1407 TDB *pTask = TASK_GetPtr( *hTask );
1408 if ((*hTask == owner) ||
1409 (pTask->hInstance == owner) ||
1410 (pTask->hQueue == owner) ||
1411 (pTask->hPDB == owner)) return pTask->hModule;
1412 *hTask = pTask->hNext;
1418 /***********************************************************************
1419 * GetExePtr (KERNEL.133)
1421 HMODULE16 WINAPI WIN16_GetExePtr( HANDLE16 handle )
1424 HMODULE16 hModule = GetExePtrHelper( handle, &hTask );
1425 STACK16FRAME *frame = CURRENT_STACK16;
1426 frame->ecx = hModule;
1427 if (hTask) frame->es = hTask;
1432 /***********************************************************************
1435 HMODULE16 WINAPI GetExePtr( HANDLE16 handle )
1438 return GetExePtrHelper( handle, &hTask );
1442 /***********************************************************************
1443 * TaskFirst (TOOLHELP.63)
1445 BOOL16 WINAPI TaskFirst16( TASKENTRY *lpte )
1447 lpte->hNext = hFirstTask;
1448 return TaskNext16( lpte );
1452 /***********************************************************************
1453 * TaskNext (TOOLHELP.64)
1455 BOOL16 WINAPI TaskNext16( TASKENTRY *lpte )
1458 INSTANCEDATA *pInstData;
1460 TRACE_(toolhelp)("(%p): task=%04x\n", lpte, lpte->hNext );
1461 if (!lpte->hNext) return FALSE;
1463 /* make sure that task and hInstance are valid (skip initial Wine task !) */
1465 pTask = TASK_GetPtr( lpte->hNext );
1466 if (!pTask || pTask->magic != TDB_MAGIC) return FALSE;
1467 if (pTask->hInstance)
1469 lpte->hNext = pTask->hNext;
1471 pInstData = MapSL( MAKESEGPTR( GlobalHandleToSel16(pTask->hInstance), 0 ) );
1472 lpte->hTask = lpte->hNext;
1473 lpte->hTaskParent = pTask->hParent;
1474 lpte->hInst = pTask->hInstance;
1475 lpte->hModule = pTask->hModule;
1476 lpte->wSS = SELECTOROF( pTask->teb->cur_stack );
1477 lpte->wSP = OFFSETOF( pTask->teb->cur_stack );
1478 lpte->wStackTop = pInstData->stacktop;
1479 lpte->wStackMinimum = pInstData->stackmin;
1480 lpte->wStackBottom = pInstData->stackbottom;
1481 lpte->wcEvents = pTask->nEvents;
1482 lpte->hQueue = pTask->hQueue;
1483 lstrcpynA( lpte->szModule, pTask->module_name, sizeof(lpte->szModule) );
1484 lpte->wPSPOffset = 0x100; /*??*/
1485 lpte->hNext = pTask->hNext;
1490 /***********************************************************************
1491 * TaskFindHandle (TOOLHELP.65)
1493 BOOL16 WINAPI TaskFindHandle16( TASKENTRY *lpte, HTASK16 hTask )
1495 lpte->hNext = hTask;
1496 return TaskNext16( lpte );
1500 typedef INT (WINAPI *MessageBoxA_funcptr)(HWND hWnd, LPCSTR text, LPCSTR title, UINT type);
1502 /**************************************************************************
1503 * FatalAppExit (KERNEL.137)
1505 void WINAPI FatalAppExit16( UINT16 action, LPCSTR str )
1507 TDB *pTask = TASK_GetCurrent();
1509 if (!pTask || !(pTask->error_mode & SEM_NOGPFAULTERRORBOX))
1511 HMODULE mod = GetModuleHandleA( "user32.dll" );
1514 MessageBoxA_funcptr pMessageBoxA = (MessageBoxA_funcptr)GetProcAddress( mod, "MessageBoxA" );
1517 pMessageBoxA( 0, str, NULL, MB_SYSTEMMODAL | MB_OK );
1521 ERR( "%s\n", debugstr_a(str) );
1528 /***********************************************************************
1529 * TerminateApp (TOOLHELP.77)
1531 * See "Undocumented Windows".
1533 void WINAPI TerminateApp16(HTASK16 hTask, WORD wFlags)
1535 if (hTask && hTask != GetCurrentTask())
1537 FIXME("cannot terminate task %x\n", hTask);
1541 if (wFlags & NO_UAE_BOX)
1544 old_mode = SetErrorMode16(0);
1545 SetErrorMode16(old_mode|SEM_NOGPFAULTERRORBOX);
1547 FatalAppExit16( 0, NULL );
1549 /* hmm, we're still alive ?? */
1551 /* check undocumented flag */
1552 if (!(wFlags & 0x8000))
1553 TASK_CallTaskSignalProc( USIG16_TERMINATION, hTask );
1555 /* UndocWin says to call int 0x21/0x4c exit=0xff here,
1556 but let's just call ExitThread */
1561 /***********************************************************************
1562 * GetAppCompatFlags (KERNEL.354)
1564 DWORD WINAPI GetAppCompatFlags16( HTASK16 hTask )
1568 if (!hTask) hTask = GetCurrentTask();
1569 if (!(pTask=TASK_GetPtr( hTask ))) return 0;
1570 if (GlobalSize16(hTask) < sizeof(TDB)) return 0;
1571 return pTask->compat_flags;
1575 /***********************************************************************
1576 * GetDOSEnvironment (KERNEL.131)
1578 * Note: the environment is allocated once, it doesn't track changes
1579 * made using the Win32 API. This shouldn't matter.
1581 * Format of a 16-bit environment block:
1582 * ASCIIZ string 1 (xx=yy format)
1587 * ASCIIZ program name (e.g. C:\WINDOWS\SYSTEM\KRNL386.EXE)
1589 SEGPTR WINAPI GetDOSEnvironment16(void)
1591 static const char ENV_program_name[] = "C:\\WINDOWS\\SYSTEM\\KRNL386.EXE";
1592 static HGLOBAL16 handle; /* handle to the 16 bit environment */
1599 p = env = GetEnvironmentStringsA();
1600 while (*p) p += strlen(p) + 1;
1601 p++; /* skip last null */
1602 size = (p - env) + sizeof(WORD) + sizeof(ENV_program_name);
1603 handle = GlobalAlloc16( GMEM_FIXED, size );
1607 LPSTR env16 = GlobalLock16( handle );
1608 memcpy( env16, env, p - env );
1609 memcpy( env16 + (p - env), &one, sizeof(one));
1610 memcpy( env16 + (p - env) + sizeof(WORD), ENV_program_name, sizeof(ENV_program_name));
1611 GlobalUnlock16( handle );
1613 FreeEnvironmentStringsA( env );
1615 return K32WOWGlobalLock16( handle );