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"
37 #include "wine/winbase16.h"
44 #include "selectors.h"
45 #include "wine/server.h"
47 #include "stackframe.h"
52 #include "wine/debug.h"
54 WINE_DEFAULT_DEBUG_CHANNEL(task);
55 WINE_DECLARE_DEBUG_CHANNEL(relay);
56 WINE_DECLARE_DEBUG_CHANNEL(toolhelp);
58 /* Min. number of thunks allocated when creating a new segment */
61 static THHOOK DefaultThhook;
63 #define hFirstTask (pThhook->HeadTDB)
64 #define hLockedTask (pThhook->LockTDB)
66 static UINT16 nTaskCount = 0;
68 static HTASK16 initial_task;
70 /***********************************************************************
73 void TASK_InstallTHHook( THHOOK *pNewThhook )
75 THHOOK *pOldThhook = pThhook;
77 pThhook = pNewThhook? pNewThhook : &DefaultThhook;
79 *pThhook = *pOldThhook;
82 /***********************************************************************
85 static TDB *TASK_GetPtr( HTASK16 hTask )
87 return GlobalLock16( hTask );
91 /***********************************************************************
94 TDB *TASK_GetCurrent(void)
96 return TASK_GetPtr( GetCurrentTask() );
100 /***********************************************************************
103 static void TASK_LinkTask( HTASK16 hTask )
108 if (!(pTask = TASK_GetPtr( hTask ))) return;
109 prevTask = &hFirstTask;
112 TDB *prevTaskPtr = TASK_GetPtr( *prevTask );
113 if (prevTaskPtr->priority >= pTask->priority) break;
114 prevTask = &prevTaskPtr->hNext;
116 pTask->hNext = *prevTask;
122 /***********************************************************************
125 static void TASK_UnlinkTask( HTASK16 hTask )
130 prevTask = &hFirstTask;
131 while (*prevTask && (*prevTask != hTask))
133 pTask = TASK_GetPtr( *prevTask );
134 prevTask = &pTask->hNext;
138 pTask = TASK_GetPtr( *prevTask );
139 *prevTask = pTask->hNext;
146 /***********************************************************************
149 * Create a thunk free-list in segment 'handle', starting from offset 'offset'
150 * and containing 'count' entries.
152 static void TASK_CreateThunks( HGLOBAL16 handle, WORD offset, WORD count )
158 pThunk = (THUNKS *)((BYTE *)GlobalLock16( handle ) + offset);
160 pThunk->magic = THUNK_MAGIC;
161 pThunk->free = (int)&pThunk->thunks - (int)pThunk;
163 for (i = 0; i < count-1; i++)
165 free += 8; /* Offset of next thunk */
166 pThunk->thunks[4*i] = free;
168 pThunk->thunks[4*i] = 0; /* Last thunk */
172 /***********************************************************************
175 * Allocate a thunk for MakeProcInstance().
177 static SEGPTR TASK_AllocThunk(void)
183 if (!(pTask = TASK_GetCurrent())) return 0;
184 sel = pTask->hCSAlias;
185 pThunk = &pTask->thunks;
186 base = (int)pThunk - (int)pTask;
187 while (!pThunk->free)
190 if (!sel) /* Allocate a new segment */
192 sel = GLOBAL_Alloc( GMEM_FIXED, sizeof(THUNKS) + (MIN_THUNKS-1)*8,
193 pTask->hPDB, WINE_LDT_FLAGS_CODE );
194 if (!sel) return (SEGPTR)0;
195 TASK_CreateThunks( sel, 0, MIN_THUNKS );
198 pThunk = (THUNKS *)GlobalLock16( sel );
201 base += pThunk->free;
202 pThunk->free = *(WORD *)((BYTE *)pThunk + pThunk->free);
203 return MAKESEGPTR( sel, base );
207 /***********************************************************************
210 * Free a MakeProcInstance() thunk.
212 static BOOL TASK_FreeThunk( SEGPTR thunk )
218 if (!(pTask = TASK_GetCurrent())) return 0;
219 sel = pTask->hCSAlias;
220 pThunk = &pTask->thunks;
221 base = (int)pThunk - (int)pTask;
222 while (sel && (sel != HIWORD(thunk)))
225 pThunk = (THUNKS *)GlobalLock16( sel );
228 if (!sel) return FALSE;
229 *(WORD *)((BYTE *)pThunk + LOWORD(thunk) - base) = pThunk->free;
230 pThunk->free = LOWORD(thunk) - base;
235 /***********************************************************************
238 * NOTE: This routine might be called by a Win32 thread. Thus, we need
239 * to be careful to protect global data structures. We do this
240 * by entering the Win16Lock while linking the task into the
243 static TDB *TASK_Create( NE_MODULE *pModule, UINT16 cmdShow, TEB *teb, LPCSTR cmdline, BYTE len )
248 HMODULE16 hModule = pModule ? pModule->self : 0;
250 /* Allocate the task structure */
252 hTask = GlobalAlloc16( GMEM_FIXED | GMEM_ZEROINIT, sizeof(TDB) );
253 if (!hTask) return NULL;
254 pTask = TASK_GetPtr( hTask );
255 FarSetOwner16( hTask, hModule );
257 /* Fill the task structure */
259 pTask->hSelf = hTask;
261 if (teb && teb->tibflags & TEBF_WIN32)
263 pTask->flags |= TDBF_WIN32;
264 pTask->hInstance = hModule;
265 pTask->hPrevInstance = 0;
266 /* NOTE: for 16-bit tasks, the instance handles are updated later on
270 pTask->version = pModule ? pModule->expected_version : 0x0400;
271 pTask->hModule = hModule;
272 pTask->hParent = GetCurrentTask();
273 pTask->magic = TDB_MAGIC;
274 pTask->nCmdShow = cmdShow;
276 pTask->curdrive = DRIVE_GetCurrentDrive() | 0x80;
277 strcpy( pTask->curdir, "\\" );
278 WideCharToMultiByte(CP_ACP, 0, DRIVE_GetDosCwd(DRIVE_GetCurrentDrive()), -1,
279 pTask->curdir + 1, sizeof(pTask->curdir) - 1, NULL, NULL);
280 pTask->curdir[sizeof(pTask->curdir) - 1] = 0; /* ensure 0 termination */
282 /* Create the thunks block */
284 TASK_CreateThunks( hTask, (int)&pTask->thunks - (int)pTask, 7 );
286 /* Copy the module name */
291 GetModuleName16( hModule, name, sizeof(name) );
292 strncpy( pTask->module_name, name, sizeof(pTask->module_name) );
293 pTask->compat_flags = GetProfileIntA( "Compatibility", name, 0 );
296 /* Allocate a selector for the PDB */
298 pTask->hPDB = GLOBAL_CreateBlock( GMEM_FIXED, &pTask->pdb, sizeof(PDB16),
299 hModule, WINE_LDT_FLAGS_DATA );
303 pTask->pdb.int20 = 0x20cd;
304 pTask->pdb.dispatcher[0] = 0x9a; /* ljmp */
305 proc = GetProcAddress16( GetModuleHandle16("KERNEL"), "DOS3Call" );
306 memcpy( &pTask->pdb.dispatcher[1], &proc, sizeof(proc) );
307 pTask->pdb.savedint22 = 0;
308 pTask->pdb.savedint23 = 0;
309 pTask->pdb.savedint24 = 0;
310 pTask->pdb.fileHandlesPtr =
311 MAKESEGPTR( GlobalHandleToSel16(pTask->hPDB), (int)&((PDB16 *)0)->fileHandles );
312 pTask->pdb.hFileHandles = 0;
313 memset( pTask->pdb.fileHandles, 0xff, sizeof(pTask->pdb.fileHandles) );
314 /* FIXME: should we make a copy of the environment? */
315 pTask->pdb.environment = SELECTOROF(GetDOSEnvironment16());
316 pTask->pdb.nbFiles = 20;
318 /* Fill the command line */
322 cmdline = GetCommandLineA();
323 /* remove the first word (program name) */
325 if (!(cmdline = strchr( cmdline+1, '"' ))) cmdline = GetCommandLineA();
326 while (*cmdline && (*cmdline != ' ') && (*cmdline != '\t')) cmdline++;
327 while ((*cmdline == ' ') || (*cmdline == '\t')) cmdline++;
328 len = strlen(cmdline);
330 if (len >= sizeof(pTask->pdb.cmdLine)) len = sizeof(pTask->pdb.cmdLine)-1;
331 pTask->pdb.cmdLine[0] = len;
332 memcpy( pTask->pdb.cmdLine + 1, cmdline, len );
333 /* pTask->pdb.cmdLine[len+1] = 0; */
335 TRACE("cmdline='%.*s' task=%04x\n", len, cmdline, hTask );
337 /* Allocate a code segment alias for the TDB */
339 pTask->hCSAlias = GLOBAL_CreateBlock( GMEM_FIXED, (void *)pTask,
340 sizeof(TDB), pTask->hPDB, WINE_LDT_FLAGS_CODE );
342 /* Default DTA overwrites command line */
344 pTask->dta = MAKESEGPTR( pTask->hPDB, (int)&pTask->pdb.cmdLine - (int)&pTask->pdb );
346 /* Create scheduler event for 16-bit tasks */
348 if ( !(pTask->flags & TDBF_WIN32) )
349 NtCreateEvent( &pTask->hEvent, EVENT_ALL_ACCESS, NULL, TRUE, FALSE );
351 /* Enter task handle into thread */
353 if (teb) teb->htask16 = hTask;
354 if (!initial_task) initial_task = hTask;
360 /***********************************************************************
363 static void TASK_DeleteTask( HTASK16 hTask )
368 if (!(pTask = TASK_GetPtr( hTask ))) return;
371 pTask->magic = 0xdead; /* invalidate signature */
373 /* Free the selector aliases */
375 GLOBAL_FreeBlock( pTask->hCSAlias );
376 GLOBAL_FreeBlock( pTask->hPDB );
378 /* Free the task module */
380 FreeModule16( pTask->hModule );
382 /* Free the task structure itself */
384 GlobalFree16( hTask );
386 /* Free all memory used by this task (including the 32-bit stack, */
387 /* the environment block and the thunk segments). */
389 GlobalFreeAll16( hPDB );
393 /***********************************************************************
394 * TASK_CreateMainTask
396 * Create a task for the main (32-bit) process.
398 void TASK_CreateMainTask(void)
401 STARTUPINFOA startup_info;
402 UINT cmdShow = 1; /* SW_SHOWNORMAL but we don't want to include winuser.h here */
404 GetStartupInfoA( &startup_info );
405 if (startup_info.dwFlags & STARTF_USESHOWWINDOW) cmdShow = startup_info.wShowWindow;
406 pTask = TASK_Create( NULL, cmdShow, NtCurrentTeb(), NULL, 0 );
409 ERR("could not create task for main process\n");
413 /* Add the task to the linked list */
414 /* (no need to get the win16 lock, we are the only thread at this point) */
415 TASK_LinkTask( pTask->hSelf );
419 /* startup routine for a new 16-bit thread */
420 static DWORD CALLBACK task_start( TDB *pTask )
424 NtCurrentTeb()->tibflags &= ~TEBF_WIN32;
425 NtCurrentTeb()->htask16 = pTask->hSelf;
428 TASK_LinkTask( pTask->hSelf );
429 pTask->teb = NtCurrentTeb();
430 ret = NE_StartTask();
436 /***********************************************************************
439 * Spawn a new 16-bit task.
441 HTASK16 TASK_SpawnTask( NE_MODULE *pModule, WORD cmdShow,
442 LPCSTR cmdline, BYTE len, HANDLE *hThread )
446 if (!(pTask = TASK_Create( pModule, cmdShow, NULL, cmdline, len ))) return 0;
447 if (!(*hThread = CreateThread( NULL, 0, (LPTHREAD_START_ROUTINE)task_start, pTask, 0, NULL )))
449 TASK_DeleteTask( pTask->hSelf );
456 /***********************************************************************
457 * TASK_GetTaskFromThread
459 HTASK16 TASK_GetTaskFromThread( DWORD thread )
461 TDB *p = TASK_GetPtr( hFirstTask );
464 if (p->teb->ClientId.UniqueThread == (HANDLE)thread) return p->hSelf;
465 p = TASK_GetPtr( p->hNext );
471 /***********************************************************************
472 * TASK_CallTaskSignalProc
474 static void TASK_CallTaskSignalProc( UINT16 uCode, HANDLE16 hTaskOrModule )
477 TDB *pTask = TASK_GetCurrent();
479 if ( !pTask || !pTask->userhandler ) return;
481 args[4] = hTaskOrModule;
484 args[1] = pTask->hInstance;
485 args[0] = pTask->hQueue;
486 WOWCallback16Ex( (DWORD)pTask->userhandler, WCB16_PASCAL, sizeof(args), args, NULL );
490 /***********************************************************************
493 void TASK_ExitTask(void)
498 /* Enter the Win16Lock to protect global data structures */
501 pTask = TASK_GetCurrent();
508 TRACE("Killing task %04x\n", pTask->hSelf );
510 /* Perform USER cleanup */
512 TASK_CallTaskSignalProc( USIG16_TERMINATION, pTask->hSelf );
514 /* Remove the task from the list to be sure we never switch back to it */
515 TASK_UnlinkTask( pTask->hSelf );
517 if (!nTaskCount || (nTaskCount == 1 && hFirstTask == initial_task))
519 TRACE("this is the last task, exiting\n" );
525 if ( hLockedTask == pTask->hSelf )
528 TASK_DeleteTask( pTask->hSelf );
530 /* ... and completely release the Win16Lock, just in case. */
531 ReleaseThunkLock( &lockCount );
535 /***********************************************************************
536 * ExitKernel (KERNEL.2)
538 * Clean-up everything and exit the Wine process.
540 void WINAPI ExitKernel16(void)
542 WriteOutProfiles16();
543 TerminateProcess( GetCurrentProcess(), 0 );
547 /***********************************************************************
548 * InitTask (KERNEL.91)
550 * Called by the application startup code.
552 void WINAPI InitTask16( CONTEXT86 *context )
555 INSTANCEDATA *pinstance;
559 if (!(pTask = TASK_GetCurrent())) return;
561 /* Note: we need to trust that BX/CX contain the stack/heap sizes,
562 as some apps, notably Visual Basic apps, *modify* the heap/stack
563 size of the instance data segment before calling InitTask() */
565 /* Initialize the INSTANCEDATA structure */
566 pinstance = MapSL( MAKESEGPTR(CURRENT_DS, 0) );
567 pinstance->stackmin = OFFSETOF( NtCurrentTeb()->cur_stack ) + sizeof( STACK16FRAME );
568 pinstance->stackbottom = pinstance->stackmin; /* yup, that's right. Confused me too. */
569 pinstance->stacktop = ( pinstance->stackmin > LOWORD(context->Ebx) ?
570 pinstance->stackmin - LOWORD(context->Ebx) : 0 ) + 150;
572 /* Initialize the local heap */
573 if (LOWORD(context->Ecx))
574 LocalInit16( GlobalHandleToSel16(pTask->hInstance), 0, LOWORD(context->Ecx) );
576 /* Initialize implicitly loaded DLLs */
577 NE_InitializeDLLs( pTask->hModule );
578 NE_DllProcessAttach( pTask->hModule );
580 /* Registers on return are:
581 * ax 1 if OK, 0 on error
582 * cx stack limit in bytes
583 * dx cmdShow parameter
584 * si instance handle of the previous instance
585 * di instance handle of the new task
586 * es:bx pointer to command line inside PSP
588 * 0 (=%bp) is pushed on the stack
590 ptr = stack16_push( sizeof(WORD) );
591 *(WORD *)MapSL(ptr) = 0;
596 if (!pTask->pdb.cmdLine[0]) context->Ebx = 0x80;
599 LPBYTE p = &pTask->pdb.cmdLine[1];
600 while ((*p == ' ') || (*p == '\t')) p++;
601 context->Ebx = 0x80 + (p - pTask->pdb.cmdLine);
603 context->Ecx = pinstance->stacktop;
604 context->Edx = pTask->nCmdShow;
605 context->Esi = (DWORD)pTask->hPrevInstance;
606 context->Edi = (DWORD)pTask->hInstance;
607 context->SegEs = (WORD)pTask->hPDB;
611 /***********************************************************************
612 * WaitEvent (KERNEL.30)
614 BOOL16 WINAPI WaitEvent16( HTASK16 hTask )
618 if (!hTask) hTask = GetCurrentTask();
619 pTask = TASK_GetPtr( hTask );
621 if (pTask->flags & TDBF_WIN32)
623 FIXME("called for Win32 thread (%04lx)!\n", GetCurrentThreadId());
627 if (pTask->nEvents > 0)
633 if (pTask->teb == NtCurrentTeb())
637 NtResetEvent( pTask->hEvent, NULL );
638 ReleaseThunkLock( &lockCount );
639 SYSLEVEL_CheckNotLevel( 1 );
640 WaitForSingleObject( pTask->hEvent, INFINITE );
641 RestoreThunkLock( lockCount );
642 if (pTask->nEvents > 0) pTask->nEvents--;
644 else FIXME("for other task %04x cur=%04x\n",pTask->hSelf,GetCurrentTask());
650 /***********************************************************************
651 * PostEvent (KERNEL.31)
653 void WINAPI PostEvent16( HTASK16 hTask )
657 if (!hTask) hTask = GetCurrentTask();
658 if (!(pTask = TASK_GetPtr( hTask ))) return;
660 if (pTask->flags & TDBF_WIN32)
662 FIXME("called for Win32 thread (%04lx)!\n", (DWORD)pTask->teb->ClientId.UniqueThread );
668 if (pTask->nEvents == 1) NtSetEvent( pTask->hEvent, NULL );
672 /***********************************************************************
673 * SetPriority (KERNEL.32)
675 void WINAPI SetPriority16( HTASK16 hTask, INT16 delta )
680 if (!hTask) hTask = GetCurrentTask();
681 if (!(pTask = TASK_GetPtr( hTask ))) return;
682 newpriority = pTask->priority + delta;
683 if (newpriority < -32) newpriority = -32;
684 else if (newpriority > 15) newpriority = 15;
686 pTask->priority = newpriority + 1;
687 TASK_UnlinkTask( pTask->hSelf );
688 TASK_LinkTask( pTask->hSelf );
693 /***********************************************************************
694 * LockCurrentTask (KERNEL.33)
696 HTASK16 WINAPI LockCurrentTask16( BOOL16 bLock )
698 if (bLock) hLockedTask = GetCurrentTask();
699 else hLockedTask = 0;
704 /***********************************************************************
705 * IsTaskLocked (KERNEL.122)
707 HTASK16 WINAPI IsTaskLocked16(void)
713 /***********************************************************************
714 * OldYield (KERNEL.117)
716 void WINAPI OldYield16(void)
720 ReleaseThunkLock(&count);
721 RestoreThunkLock(count);
724 /***********************************************************************
725 * WIN32_OldYield (KERNEL.447)
727 void WINAPI WIN32_OldYield16(void)
731 ReleaseThunkLock(&count);
732 RestoreThunkLock(count);
735 /***********************************************************************
736 * DirectedYield (KERNEL.150)
738 void WINAPI DirectedYield16( HTASK16 hTask )
743 /***********************************************************************
746 void WINAPI Yield16(void)
748 TDB *pCurTask = TASK_GetCurrent();
750 if (pCurTask && pCurTask->hQueue)
752 HMODULE mod = GetModuleHandleA( "user32.dll" );
755 FARPROC proc = GetProcAddress( mod, "UserYield16" );
766 /***********************************************************************
767 * KERNEL_490 (KERNEL.490)
769 HTASK16 WINAPI KERNEL_490( HTASK16 someTask )
771 if ( !someTask ) return 0;
773 FIXME("(%04x): stub\n", someTask );
777 /***********************************************************************
778 * MakeProcInstance (KERNEL.51)
780 FARPROC16 WINAPI MakeProcInstance16( FARPROC16 func, HANDLE16 hInstance )
784 WORD hInstanceSelector;
786 hInstanceSelector = GlobalHandleToSel16(hInstance);
788 TRACE("(%08lx, %04x);\n", (DWORD)func, hInstance);
791 /* Win95 actually protects via SEH, but this is better for debugging */
792 WARN("Ouch ! Called with invalid func 0x%08lx !\n", (DWORD)func);
796 if ( (GlobalHandleToSel16(CURRENT_DS) != hInstanceSelector)
798 && (hInstance != 0xffff) )
800 /* calling MPI with a foreign DSEG is invalid ! */
801 WARN("Problem with hInstance? Got %04x, using %04x instead\n",
802 hInstance,CURRENT_DS);
805 /* Always use the DSEG that MPI was entered with.
806 * We used to set hInstance to GetTaskDS16(), but this should be wrong
807 * as CURRENT_DS provides the DSEG value we need.
808 * ("calling" DS, *not* "task" DS !) */
809 hInstanceSelector = CURRENT_DS;
810 hInstance = GlobalHandle16(hInstanceSelector);
812 /* no thunking for DLLs */
813 if (NE_GetPtr(FarGetOwner16(hInstance))->flags & NE_FFLAGS_LIBMODULE)
816 thunkaddr = TASK_AllocThunk();
817 if (!thunkaddr) return (FARPROC16)0;
818 thunk = MapSL( thunkaddr );
819 lfunc = MapSL( (SEGPTR)func );
821 TRACE("(%08lx,%04x): got thunk %08lx\n",
822 (DWORD)func, hInstance, (DWORD)thunkaddr );
823 if (((lfunc[0]==0x8c) && (lfunc[1]==0xd8)) || /* movw %ds, %ax */
824 ((lfunc[0]==0x1e) && (lfunc[1]==0x58)) /* pushw %ds, popw %ax */
826 WARN("This was the (in)famous \"thunk useless\" warning. We thought we have to overwrite with nop;nop;, but this isn't true.\n");
829 *thunk++ = 0xb8; /* movw instance, %ax */
830 *thunk++ = (BYTE)(hInstanceSelector & 0xff);
831 *thunk++ = (BYTE)(hInstanceSelector >> 8);
832 *thunk++ = 0xea; /* ljmp func */
833 *(DWORD *)thunk = (DWORD)func;
834 return (FARPROC16)thunkaddr;
835 /* CX reg indicates if thunkaddr != NULL, implement if needed */
839 /***********************************************************************
840 * FreeProcInstance (KERNEL.52)
842 void WINAPI FreeProcInstance16( FARPROC16 func )
844 TRACE("(%08lx)\n", (DWORD)func );
845 TASK_FreeThunk( (SEGPTR)func );
848 /**********************************************************************
849 * TASK_GetCodeSegment
851 * Helper function for GetCodeHandle/GetCodeInfo: Retrieve the module
852 * and logical segment number of a given code segment.
854 * 'proc' either *is* already a pair of module handle and segment number,
855 * in which case there's nothing to do. Otherwise, it is a pointer to
856 * a function, and we need to retrieve the code segment. If the pointer
857 * happens to point to a thunk, we'll retrieve info about the code segment
858 * where the function pointed to by the thunk resides, not the thunk itself.
860 * FIXME: if 'proc' is a SNOOP16 return stub, we should retrieve info about
861 * the function the snoop code will return to ...
864 static BOOL TASK_GetCodeSegment( FARPROC16 proc, NE_MODULE **ppModule,
865 SEGTABLEENTRY **ppSeg, int *pSegNr )
867 NE_MODULE *pModule = NULL;
868 SEGTABLEENTRY *pSeg = NULL;
871 /* Try pair of module handle / segment number */
872 pModule = (NE_MODULE *) GlobalLock16( HIWORD( proc ) );
873 if ( pModule && pModule->magic == IMAGE_OS2_SIGNATURE )
875 segNr = LOWORD( proc );
876 if ( segNr && segNr <= pModule->seg_count )
877 pSeg = NE_SEG_TABLE( pModule ) + segNr-1;
880 /* Try thunk or function */
883 BYTE *thunk = MapSL( (SEGPTR)proc );
886 if ((thunk[0] == 0xb8) && (thunk[3] == 0xea))
887 selector = thunk[6] + (thunk[7] << 8);
889 selector = HIWORD( proc );
891 pModule = NE_GetPtr( GlobalHandle16( selector ) );
892 pSeg = pModule? NE_SEG_TABLE( pModule ) : NULL;
895 for ( segNr = 1; segNr <= pModule->seg_count; segNr++, pSeg++ )
896 if ( GlobalHandleToSel16(pSeg->hSeg) == selector )
899 if ( pModule && segNr > pModule->seg_count )
903 /* Abort if segment not found */
905 if ( !pModule || !pSeg )
908 /* Return segment data */
910 if ( ppModule ) *ppModule = pModule;
911 if ( ppSeg ) *ppSeg = pSeg;
912 if ( pSegNr ) *pSegNr = segNr;
917 /**********************************************************************
918 * GetCodeHandle (KERNEL.93)
920 HANDLE16 WINAPI GetCodeHandle16( FARPROC16 proc )
924 if ( !TASK_GetCodeSegment( proc, NULL, &pSeg, NULL ) )
930 /**********************************************************************
931 * GetCodeInfo (KERNEL.104)
933 BOOL16 WINAPI GetCodeInfo16( FARPROC16 proc, SEGINFO *segInfo )
939 if ( !TASK_GetCodeSegment( proc, &pModule, &pSeg, &segNr ) )
942 /* Fill in segment information */
944 segInfo->offSegment = pSeg->filepos;
945 segInfo->cbSegment = pSeg->size;
946 segInfo->flags = pSeg->flags;
947 segInfo->cbAlloc = pSeg->minsize;
948 segInfo->h = pSeg->hSeg;
949 segInfo->alignShift = pModule->alignment;
951 if ( segNr == pModule->dgroup )
952 segInfo->cbAlloc += pModule->heap_size + pModule->stack_size;
954 /* Return module handle in %es */
956 CURRENT_STACK16->es = GlobalHandleToSel16( pModule->self );
962 /**********************************************************************
963 * DefineHandleTable (KERNEL.94)
965 BOOL16 WINAPI DefineHandleTable16( WORD wOffset )
967 FIXME("(%04x): stub ?\n", wOffset);
972 /***********************************************************************
973 * SetTaskQueue (KERNEL.34)
975 HQUEUE16 WINAPI SetTaskQueue16( HTASK16 hTask, HQUEUE16 hQueue )
980 if (!hTask) hTask = GetCurrentTask();
981 if (!(pTask = TASK_GetPtr( hTask ))) return 0;
983 hPrev = pTask->hQueue;
984 pTask->hQueue = hQueue;
990 /***********************************************************************
991 * GetTaskQueue (KERNEL.35)
993 HQUEUE16 WINAPI GetTaskQueue16( HTASK16 hTask )
997 if (!hTask) hTask = GetCurrentTask();
998 if (!(pTask = TASK_GetPtr( hTask ))) return 0;
999 return pTask->hQueue;
1002 /***********************************************************************
1003 * SetThreadQueue (KERNEL.463)
1005 HQUEUE16 WINAPI SetThreadQueue16( DWORD thread, HQUEUE16 hQueue )
1007 HQUEUE16 oldQueue = NtCurrentTeb()->queue;
1009 if (thread && thread != GetCurrentThreadId())
1011 FIXME( "not supported on other thread %04lx\n", thread );
1014 NtCurrentTeb()->queue = hQueue;
1015 if ( GetTaskQueue16( NtCurrentTeb()->htask16 ) == oldQueue )
1016 SetTaskQueue16( NtCurrentTeb()->htask16, hQueue );
1020 /***********************************************************************
1021 * GetThreadQueue (KERNEL.464)
1023 HQUEUE16 WINAPI GetThreadQueue16( DWORD thread )
1025 if (thread && thread != GetCurrentThreadId())
1027 FIXME( "not supported on other thread %04lx\n", thread );
1030 return NtCurrentTeb()->queue;
1033 /***********************************************************************
1034 * SetFastQueue (KERNEL.624)
1036 VOID WINAPI SetFastQueue16( DWORD thread, HQUEUE16 hQueue )
1038 if (!thread || thread == GetCurrentThreadId())
1039 NtCurrentTeb()->queue = hQueue;
1041 FIXME( "not supported on other thread %04lx\n", thread );
1044 /***********************************************************************
1045 * GetFastQueue (KERNEL.625)
1047 HQUEUE16 WINAPI GetFastQueue16( void )
1049 HQUEUE16 ret = NtCurrentTeb()->queue;
1051 if (!ret) FIXME("(): should initialize thread-local queue, expect failure!\n" );
1055 /***********************************************************************
1056 * SwitchStackTo (KERNEL.108)
1058 void WINAPI SwitchStackTo16( WORD seg, WORD ptr, WORD top )
1060 STACK16FRAME *oldFrame, *newFrame;
1061 INSTANCEDATA *pData;
1064 if (!(pData = (INSTANCEDATA *)GlobalLock16( seg ))) return;
1065 TRACE("old=%04x:%04x new=%04x:%04x\n",
1066 SELECTOROF( NtCurrentTeb()->cur_stack ),
1067 OFFSETOF( NtCurrentTeb()->cur_stack ), seg, ptr );
1069 /* Save the old stack */
1071 oldFrame = CURRENT_STACK16;
1072 /* pop frame + args and push bp */
1073 pData->old_ss_sp = NtCurrentTeb()->cur_stack + sizeof(STACK16FRAME)
1075 *(WORD *)MapSL(pData->old_ss_sp) = oldFrame->bp;
1076 pData->stacktop = top;
1077 pData->stackmin = ptr;
1078 pData->stackbottom = ptr;
1080 /* Switch to the new stack */
1082 /* Note: we need to take the 3 arguments into account; otherwise,
1083 * the stack will underflow upon return from this function.
1085 copySize = oldFrame->bp - OFFSETOF(pData->old_ss_sp);
1086 copySize += 3 * sizeof(WORD) + sizeof(STACK16FRAME);
1087 NtCurrentTeb()->cur_stack = MAKESEGPTR( seg, ptr - copySize );
1088 newFrame = CURRENT_STACK16;
1090 /* Copy the stack frame and the local variables to the new stack */
1092 memmove( newFrame, oldFrame, copySize );
1094 *(WORD *)MapSL( MAKESEGPTR( seg, ptr ) ) = 0; /* clear previous bp */
1098 /***********************************************************************
1099 * SwitchStackBack (KERNEL.109)
1101 void WINAPI SwitchStackBack16( CONTEXT86 *context )
1103 STACK16FRAME *oldFrame, *newFrame;
1104 INSTANCEDATA *pData;
1106 if (!(pData = (INSTANCEDATA *)GlobalLock16(SELECTOROF(NtCurrentTeb()->cur_stack))))
1108 if (!pData->old_ss_sp)
1110 WARN("No previous SwitchStackTo\n" );
1113 TRACE("restoring stack %04x:%04x\n",
1114 SELECTOROF(pData->old_ss_sp), OFFSETOF(pData->old_ss_sp) );
1116 oldFrame = CURRENT_STACK16;
1118 /* Pop bp from the previous stack */
1120 context->Ebp = (context->Ebp & ~0xffff) | *(WORD *)MapSL(pData->old_ss_sp);
1121 pData->old_ss_sp += sizeof(WORD);
1123 /* Switch back to the old stack */
1125 NtCurrentTeb()->cur_stack = pData->old_ss_sp - sizeof(STACK16FRAME);
1126 context->SegSs = SELECTOROF(pData->old_ss_sp);
1127 context->Esp = OFFSETOF(pData->old_ss_sp) - sizeof(DWORD); /*ret addr*/
1128 pData->old_ss_sp = 0;
1130 /* Build a stack frame for the return */
1132 newFrame = CURRENT_STACK16;
1133 newFrame->frame32 = oldFrame->frame32;
1134 newFrame->module_cs = oldFrame->module_cs;
1135 newFrame->callfrom_ip = oldFrame->callfrom_ip;
1136 newFrame->entry_ip = oldFrame->entry_ip;
1140 /***********************************************************************
1141 * GetTaskQueueDS (KERNEL.118)
1143 void WINAPI GetTaskQueueDS16(void)
1145 CURRENT_STACK16->ds = GlobalHandleToSel16( GetTaskQueue16(0) );
1149 /***********************************************************************
1150 * GetTaskQueueES (KERNEL.119)
1152 void WINAPI GetTaskQueueES16(void)
1154 CURRENT_STACK16->es = GlobalHandleToSel16( GetTaskQueue16(0) );
1158 /***********************************************************************
1159 * GetCurrentTask (KERNEL32.@)
1161 HTASK16 WINAPI GetCurrentTask(void)
1163 return NtCurrentTeb()->htask16;
1166 /***********************************************************************
1167 * GetCurrentTask (KERNEL.36)
1169 DWORD WINAPI WIN16_GetCurrentTask(void)
1171 /* This is the version used by relay code; the first task is */
1172 /* returned in the high word of the result */
1173 return MAKELONG( GetCurrentTask(), hFirstTask );
1177 /***********************************************************************
1178 * GetCurrentPDB (KERNEL.37)
1180 * UNDOC: returns PSP of KERNEL in high word
1182 DWORD WINAPI GetCurrentPDB16(void)
1186 if (!(pTask = TASK_GetCurrent())) return 0;
1187 return MAKELONG(pTask->hPDB, 0); /* FIXME */
1191 /***********************************************************************
1192 * GetCurPID (KERNEL.157)
1194 DWORD WINAPI GetCurPID16( DWORD unused )
1200 /***********************************************************************
1201 * GetInstanceData (KERNEL.54)
1203 INT16 WINAPI GetInstanceData16( HINSTANCE16 instance, WORD buffer, INT16 len )
1205 char *ptr = (char *)GlobalLock16( instance );
1206 if (!ptr || !len) return 0;
1207 if ((int)buffer + len >= 0x10000) len = 0x10000 - buffer;
1208 memcpy( (char *)GlobalLock16(CURRENT_DS) + buffer, ptr + buffer, len );
1213 /***********************************************************************
1214 * GetExeVersion (KERNEL.105)
1216 WORD WINAPI GetExeVersion16(void)
1220 if (!(pTask = TASK_GetCurrent())) return 0;
1221 return pTask->version;
1225 /***********************************************************************
1226 * SetErrorMode (KERNEL.107)
1228 UINT16 WINAPI SetErrorMode16( UINT16 mode )
1231 if (!(pTask = TASK_GetCurrent())) return 0;
1232 pTask->error_mode = mode;
1233 return SetErrorMode( mode );
1237 /***********************************************************************
1238 * GetNumTasks (KERNEL.152)
1240 UINT16 WINAPI GetNumTasks16(void)
1246 /***********************************************************************
1247 * GetTaskDS (KERNEL.155)
1249 * Note: this function apparently returns a DWORD with LOWORD == HIWORD.
1250 * I don't think we need to bother with this.
1252 HINSTANCE16 WINAPI GetTaskDS16(void)
1256 if (!(pTask = TASK_GetCurrent())) return 0;
1257 return GlobalHandleToSel16(pTask->hInstance);
1260 /***********************************************************************
1261 * GetDummyModuleHandleDS (KERNEL.602)
1263 WORD WINAPI GetDummyModuleHandleDS16(void)
1268 if (!(pTask = TASK_GetCurrent())) return 0;
1269 if (!(pTask->flags & TDBF_WIN32)) return 0;
1270 selector = GlobalHandleToSel16( pTask->hModule );
1271 CURRENT_DS = selector;
1275 /***********************************************************************
1276 * IsTask (KERNEL.320)
1278 BOOL16 WINAPI IsTask16( HTASK16 hTask )
1282 if (!(pTask = TASK_GetPtr( hTask ))) return FALSE;
1283 if (GlobalSize16( hTask ) < sizeof(TDB)) return FALSE;
1284 return (pTask->magic == TDB_MAGIC);
1288 /***********************************************************************
1289 * IsWinOldApTask (KERNEL.158)
1291 BOOL16 WINAPI IsWinOldApTask16( HTASK16 hTask )
1293 /* should return bit 0 of byte 0x48 in PSP */
1297 /***********************************************************************
1298 * SetTaskSignalProc (KERNEL.38)
1300 FARPROC16 WINAPI SetTaskSignalProc( HTASK16 hTask, FARPROC16 proc )
1305 if (!hTask) hTask = GetCurrentTask();
1306 if (!(pTask = TASK_GetPtr( hTask ))) return NULL;
1307 oldProc = pTask->userhandler;
1308 pTask->userhandler = proc;
1312 /***********************************************************************
1313 * SetSigHandler (KERNEL.140)
1315 WORD WINAPI SetSigHandler16( FARPROC16 newhandler, FARPROC16* oldhandler,
1316 UINT16 *oldmode, UINT16 newmode, UINT16 flag )
1318 FIXME("(%p,%p,%p,%d,%d), unimplemented.\n",
1319 newhandler,oldhandler,oldmode,newmode,flag );
1321 if (flag != 1) return 0;
1322 if (!newmode) newhandler = NULL; /* Default handler */
1327 if (!(pTask = TASK_GetCurrent())) return 0;
1328 if (oldmode) *oldmode = pTask->signal_flags;
1329 pTask->signal_flags = newmode;
1330 if (oldhandler) *oldhandler = pTask->sighandler;
1331 pTask->sighandler = newhandler;
1337 /***********************************************************************
1338 * GlobalNotify (KERNEL.154)
1340 * Note that GlobalNotify does _not_ return the old NotifyProc
1341 * -- contrary to LocalNotify !!
1343 VOID WINAPI GlobalNotify16( FARPROC16 proc )
1347 if (!(pTask = TASK_GetCurrent())) return;
1348 pTask->discardhandler = proc;
1352 /***********************************************************************
1355 static inline HMODULE16 GetExePtrHelper( HANDLE16 handle, HTASK16 *hTask )
1360 /* Check for module handle */
1362 if (!(ptr = GlobalLock16( handle ))) return 0;
1363 if (((NE_MODULE *)ptr)->magic == IMAGE_OS2_SIGNATURE) return handle;
1365 /* Search for this handle inside all tasks */
1367 *hTask = hFirstTask;
1370 TDB *pTask = TASK_GetPtr( *hTask );
1371 if ((*hTask == handle) ||
1372 (pTask->hInstance == handle) ||
1373 (pTask->hQueue == handle) ||
1374 (pTask->hPDB == handle)) return pTask->hModule;
1375 *hTask = pTask->hNext;
1378 /* Check the owner for module handle */
1380 owner = FarGetOwner16( handle );
1381 if (!(ptr = GlobalLock16( owner ))) return 0;
1382 if (((NE_MODULE *)ptr)->magic == IMAGE_OS2_SIGNATURE) return owner;
1384 /* Search for the owner inside all tasks */
1386 *hTask = hFirstTask;
1389 TDB *pTask = TASK_GetPtr( *hTask );
1390 if ((*hTask == owner) ||
1391 (pTask->hInstance == owner) ||
1392 (pTask->hQueue == owner) ||
1393 (pTask->hPDB == owner)) return pTask->hModule;
1394 *hTask = pTask->hNext;
1400 /***********************************************************************
1401 * GetExePtr (KERNEL.133)
1403 HMODULE16 WINAPI WIN16_GetExePtr( HANDLE16 handle )
1406 HMODULE16 hModule = GetExePtrHelper( handle, &hTask );
1407 STACK16FRAME *frame = CURRENT_STACK16;
1408 frame->ecx = hModule;
1409 if (hTask) frame->es = hTask;
1414 /***********************************************************************
1417 HMODULE16 WINAPI GetExePtr( HANDLE16 handle )
1420 return GetExePtrHelper( handle, &hTask );
1424 /***********************************************************************
1425 * TaskFirst (TOOLHELP.63)
1427 BOOL16 WINAPI TaskFirst16( TASKENTRY *lpte )
1429 lpte->hNext = hFirstTask;
1430 return TaskNext16( lpte );
1434 /***********************************************************************
1435 * TaskNext (TOOLHELP.64)
1437 BOOL16 WINAPI TaskNext16( TASKENTRY *lpte )
1440 INSTANCEDATA *pInstData;
1442 TRACE_(toolhelp)("(%p): task=%04x\n", lpte, lpte->hNext );
1443 if (!lpte->hNext) return FALSE;
1445 /* make sure that task and hInstance are valid (skip initial Wine task !) */
1447 pTask = TASK_GetPtr( lpte->hNext );
1448 if (!pTask || pTask->magic != TDB_MAGIC) return FALSE;
1449 if (pTask->hInstance)
1451 lpte->hNext = pTask->hNext;
1453 pInstData = MapSL( MAKESEGPTR( GlobalHandleToSel16(pTask->hInstance), 0 ) );
1454 lpte->hTask = lpte->hNext;
1455 lpte->hTaskParent = pTask->hParent;
1456 lpte->hInst = pTask->hInstance;
1457 lpte->hModule = pTask->hModule;
1458 lpte->wSS = SELECTOROF( pTask->teb->cur_stack );
1459 lpte->wSP = OFFSETOF( pTask->teb->cur_stack );
1460 lpte->wStackTop = pInstData->stacktop;
1461 lpte->wStackMinimum = pInstData->stackmin;
1462 lpte->wStackBottom = pInstData->stackbottom;
1463 lpte->wcEvents = pTask->nEvents;
1464 lpte->hQueue = pTask->hQueue;
1465 lstrcpynA( lpte->szModule, pTask->module_name, sizeof(lpte->szModule) );
1466 lpte->wPSPOffset = 0x100; /*??*/
1467 lpte->hNext = pTask->hNext;
1472 /***********************************************************************
1473 * TaskFindHandle (TOOLHELP.65)
1475 BOOL16 WINAPI TaskFindHandle16( TASKENTRY *lpte, HTASK16 hTask )
1477 lpte->hNext = hTask;
1478 return TaskNext16( lpte );
1482 typedef INT (WINAPI *MessageBoxA_funcptr)(HWND hWnd, LPCSTR text, LPCSTR title, UINT type);
1484 /**************************************************************************
1485 * FatalAppExit (KERNEL.137)
1487 void WINAPI FatalAppExit16( UINT16 action, LPCSTR str )
1489 TDB *pTask = TASK_GetCurrent();
1491 if (!pTask || !(pTask->error_mode & SEM_NOGPFAULTERRORBOX))
1493 HMODULE mod = GetModuleHandleA( "user32.dll" );
1496 MessageBoxA_funcptr pMessageBoxA = (MessageBoxA_funcptr)GetProcAddress( mod, "MessageBoxA" );
1499 pMessageBoxA( 0, str, NULL, MB_SYSTEMMODAL | MB_OK );
1503 ERR( "%s\n", debugstr_a(str) );
1510 /***********************************************************************
1511 * TerminateApp (TOOLHELP.77)
1513 * See "Undocumented Windows".
1515 void WINAPI TerminateApp16(HTASK16 hTask, WORD wFlags)
1517 if (hTask && hTask != GetCurrentTask())
1519 FIXME("cannot terminate task %x\n", hTask);
1523 if (wFlags & NO_UAE_BOX)
1526 old_mode = SetErrorMode16(0);
1527 SetErrorMode16(old_mode|SEM_NOGPFAULTERRORBOX);
1529 FatalAppExit16( 0, NULL );
1531 /* hmm, we're still alive ?? */
1533 /* check undocumented flag */
1534 if (!(wFlags & 0x8000))
1535 TASK_CallTaskSignalProc( USIG16_TERMINATION, hTask );
1537 /* UndocWin says to call int 0x21/0x4c exit=0xff here,
1538 but let's just call ExitThread */
1543 /***********************************************************************
1544 * GetAppCompatFlags (KERNEL.354)
1546 DWORD WINAPI GetAppCompatFlags16( HTASK16 hTask )
1550 if (!hTask) hTask = GetCurrentTask();
1551 if (!(pTask=TASK_GetPtr( hTask ))) return 0;
1552 if (GlobalSize16(hTask) < sizeof(TDB)) return 0;
1553 return pTask->compat_flags;