source: trunk/src/kernel32/windlllx.cpp@ 5075

Last change on this file since 5075 was 5075, checked in by sandervl, 25 years ago

heap (shared+code) changes + lx dll unload workaround
File size: 11.7 KB
Line 
1/* $Id: windlllx.cpp,v 1.17 2001-02-09 18:31:05 sandervl Exp $ */
2
3/*
4 * Win32 LX Dll class (compiled in OS/2 using Odin32 api)
5 *
6 * Copyright 1999-2000 Sander van Leeuwen (sandervl@xs4all.nl)
7 *
8 * TODO: Unloading of dlls probably needs to be fixed due to OS/2 bug
9 * (wrong unload order of dlls)
10 *
11 * Project Odin Software License can be found in LICENSE.TXT
12 *
13 */
14#define INCL_DOSFILEMGR /* File Manager values */
15#define INCL_DOSERRORS /* DOS Error values */
16#define INCL_DOSPROCESS /* DOS Process values */
17#define INCL_DOSMODULEMGR
18#define INCL_DOSMISC /* DOS Miscellanous values */
19#define INCL_WIN
20#include <os2wrap.h> //Odin32 OS/2 api wrappers
21#include <os2newapi.h>
22#include <stdio.h>
23#include <string.h>
24#include <stdlib.h>
25#include <iostream.h>
26#include <fstream.h>
27#include <misc.h>
28#include <win32type.h>
29#include <windllbase.h>
30#include <windlllx.h>
31#include "winexepe2lx.h"
32#include "winexepeldr.h"
33#include <odinlx.h>
34#include <wprocess.h>
35#include "oslibmisc.h"
36
37#include <exe386.h>
38
39#define DBG_LOCALLOG DBG_windlllx
40#include "dbglocal.h"
41
42//******************************************************************************
43//Create LX Dll object and send process attach message
44//System dlls set EntryPoint to 0
45//Parameters:
46// HINSTANCE hInstance - OS/2 module handle
47// WIN32DLLENTRY EntryPoint - Win32 dll entrypoint address
48// PVOID pResData - pointer to win32 resource data
49// DWORD MajorImageVersion - major image/os version (for fake win32 header)
50// DWORD MinorImageVersion - minor image/os version (for fake win32 header)
51// DWORD Subsystem - subsystem type (for fake win32 header)
52// (IMAGE_SUBSYSTEM_WINDOWS_CUI/IMAGE_SUBSYSTEM_WINDOWS_GUI)
53//
54//Returns: Odin32 module handle
55//******************************************************************************
56DWORD WIN32API RegisterLxDll(HINSTANCE hInstance, WIN32DLLENTRY EntryPoint,
57 PVOID pResData,
58 DWORD MajorImageVersion,
59 DWORD MinorImageVersion,
60 DWORD Subsystem)
61{
62 APIRET rc;
63 Win32LxDll *windll;
64 Win32DllBase *windlldep;
65 char szFileName[CCHMAXPATH], szErrName[CCHMAXPATH];
66
67 if(OSLibGetDllName(hInstance, szFileName, sizeof(szFileName)) == FALSE) {
68 dprintf(("ERROR: RegisterLxDll: OSLibGetDllName %x failed!!", hInstance));
69 return 0;
70 }
71 //Make sure DosLoadModule is called at least
72 //once for a dll (to make sure OS/2 doesn't unload the dll when it's
73 //still needed)
74//testestest
75 rc = DosLoadModule(szErrName, sizeof(szErrName), szFileName, &hInstance);
76 if(rc != 0) {
77 dprintf(("ERROR: RegisterLxDll: DosLoadModule %s failed (rc=%d)!!", szFileName, rc));
78 return 0;
79 }
80//testestest
81 windll = new Win32LxDll(hInstance, EntryPoint, pResData, MajorImageVersion,
82 MinorImageVersion, Subsystem);
83 if(windll == NULL) {
84 dprintf(("RegisterLxDll: windll == NULL!!!"));
85 return 0;
86 }
87 if(!fPeLoader) {
88 windll->AddRef();
89
90 if(windll->attachProcess() == 0)
91 return 0;
92
93 return windll->getInstanceHandle();
94 }
95 IMAGE_DOS_HEADER doshdr;
96 struct e32_exe lxhdr;
97 ULONG offset;
98 char modulename[CCHMAXPATH];
99 char modsize;
100 int i;
101
102 //SvL: This code reads the import name table of the dll to get the dependencies
103 // on other dlls.
104 //DosQueryHeaderInfo is an undocumented api, but works very well.
105 //(no need to save FS here as we'll return to OS/2 immediately)
106 rc = DosQueryHeaderInfo(hInstance, 0, &doshdr, sizeof(IMAGE_DOS_HEADER), QHINF_READFILE);
107 if(rc) {
108 goto hdrerror;
109 }
110 rc = DosQueryHeaderInfo(hInstance, doshdr.e_lfanew, &lxhdr, sizeof(e32_exe), QHINF_READFILE);
111 if(rc) {
112 goto hdrerror;
113 }
114 offset = doshdr.e_lfanew + lxhdr.e32_impmod;
115 for(i=0;i<lxhdr.e32_impmodcnt;i++) {
116 rc = DosQueryHeaderInfo(hInstance, offset, &modsize, 1, QHINF_READFILE);
117 if(rc) {
118 goto hdrerror;
119 }
120 rc = DosQueryHeaderInfo(hInstance, offset+1, &modulename, min(modsize, sizeof(modulename)), QHINF_READFILE);
121 if(rc) {
122 goto hdrerror;
123 }
124 modulename[modsize] = 0;
125 windlldep = Win32DllBase::findModule(modulename, TRUE);
126 if(windlldep) {
127 dprintf(("RegisterLxDll: Add dependency %s -> %s", windll->getModuleName(), modulename));
128 windll->addDependency(windlldep);
129 }
130 else dprintf(("WARNING: Can't find dll %s referenced by %s", modulename, windll->getModuleName()));
131 offset += modsize + 1;
132 }
133 return windll->getInstanceHandle();
134
135hdrerror:
136 dprintf(("DosQueryHeaderInfo returned %d", rc));
137 return windll->getInstanceHandle();
138}
139//******************************************************************************
140//Destroy LX Dll object
141//******************************************************************************
142BOOL WIN32API UnregisterLxDll(HINSTANCE hInstance)
143{
144 Win32DllBase *windll;
145
146 //Don't proceed for pe2lx/win32k (os/2 dll unload dependency bug)
147 //Don't do it either after ExitProcess has been called
148 if(!fPeLoader || WinExe == NULL)
149 return TRUE;
150
151 windll = Win32DllBase::findModule(hInstance);
152 if(!windll) {
153 dprintf(("UnregisterLxDll: Can't find dll with handle %x (already deleted)", hInstance));
154 return TRUE; //already deleted by Win32LxDll::Release
155 }
156 dprintf(("UnregisterLxDll %s", windll->getModuleName()));
157 //This can only happen for LX dependencies (i.e. wininet loads wsock32)
158 delete windll;
159 return TRUE;
160}
161//******************************************************************************
162//******************************************************************************
163Win32LxDll::Win32LxDll(HINSTANCE hInstance, WIN32DLLENTRY EntryPoint, PVOID pResData,
164 DWORD MajorImageVersion, DWORD MinorImageVersion,
165 DWORD Subsystem)
166 : Win32ImageBase(hInstance),
167 Win32LxImage(hInstance, pResData),
168 Win32DllBase(hInstance, EntryPoint)
169{
170 this->MajorImageVersion = MajorImageVersion;
171 this->MinorImageVersion = MinorImageVersion;
172 this->Subsystem = Subsystem;
173
174 if(EntryPoint == NULL) {
175 fSkipThreadEntryCalls = TRUE;
176 fAttachedToProcess = TRUE;
177 }
178 hinstanceOS2 = hInstance;
179 //new win32 instance handle must be pointer to PE header
180 hinstance = (HINSTANCE)buildHeader(MajorImageVersion, MinorImageVersion,
181 Subsystem);
182 dprintf(("Fake PE header %x for dll %s", hinstance, getModuleName()));
183}
184//******************************************************************************
185//******************************************************************************
186Win32LxDll::~Win32LxDll()
187{
188}
189//******************************************************************************
190//Returns reference count or -1 if load failed (PE loader only!)
191//******************************************************************************
192#ifdef DEBUG
193ULONG Win32LxDll::AddRef(char *parentname)
194#else
195ULONG Win32LxDll::AddRef()
196#endif
197{
198 Win32DllBase *dll;
199 QueueItem *item;
200 ULONG ret;
201
202#ifdef DEBUG
203 ret = Win32DllBase::AddRef(parentname);
204#else
205 ret = Win32DllBase::AddRef();
206#endif
207
208 if(!fPeLoader)
209 return ret;
210
211 if(referenced == 1)
212 {
213 item = loadedDlls.Head();
214 while(item) {
215 dll = (Win32DllBase *)loadedDlls.getItem(item);
216 if(dll == NULL) {
217 dprintf(("ERROR: Win32DllBase::AddRef: dll item == NULL!!"));
218 DebugInt3();
219 return -1;
220 }
221#ifdef DEBUG
222 dll->AddRef(getModuleName());
223#else
224 dll->AddRef();
225#endif
226 item = loadedDlls.getNext(item);
227 }
228 if(attachProcess() == 0) {
229 dprintf(("WARNING: Dll %s refused to be loaded; aborting", getName()));
230 return -1;
231 }
232 }
233 return ret;
234}
235//******************************************************************************
236//******************************************************************************
237ULONG Win32LxDll::Release()
238{
239 HINSTANCE hinst;
240 WIN32DLLENTRY EntryPointTmp = dllEntryPoint;
241 PVOID pResDataTmp = (PVOID)pResRootDir;
242 DWORD MajorImageVersionTmp = MajorImageVersion;
243 DWORD MinorImageVersionTmp = MinorImageVersion;
244 DWORD SubsystemTmp = Subsystem;
245 ULONG ret;
246 APIRET rc;
247 BOOL fNoUnload = fDisableUnload; //only set for kernel32.dll
248 Win32LxDll *pModule;
249
250 hinst = hinstanceOS2;
251 ret = Win32DllBase::Release();
252 if(ret == 0 && !fNoUnload) {//only set for kernel32.dll (fDisableUnload)
253 //DosFreeModule sends a termination message to the dll.
254 //The LX dll informs us when it's removed (UnregisterDll call)
255 rc = DosFreeModule(hinst);
256 if(rc) {
257 dprintf(("Win32LxDll::Release: DosFreeModule %x returned %d", hinst, rc));
258 if(rc == ERROR_INVALID_ACCESS && !fExitProcess) {
259 //Dll refused to unload because it has an active exitlist handler
260 //or depends on a dll that registered an exitlist handler
261 //In this case the handle remains valid and the entrypoint of
262 //the dll is NOT called for DLL_PROCESS_DETACH
263 //WORKAROUND: Re-register the dll so future LoadLibrary calls
264 // don't fail!
265 dprintf(("WORKAROUND: Re-register the dll so future LoadLibrary calls don't fail!"));
266 RegisterLxDll(hinst, EntryPointTmp, pResDataTmp,
267 MajorImageVersionTmp,
268 MinorImageVersionTmp,
269 SubsystemTmp);
270
271 /* OS/2 dll, system dll, converted dll or win32k took care of it. */
272 pModule = Win32LxDll::findModuleByOS2Handle(hinst);
273 if(pModule)
274 {
275 pModule->setDllHandleOS2(hinst);
276 if(fPeLoader)
277 {
278 if(pModule->AddRef() == -1) {//-1 -> load failed (attachProcess)
279 dprintf(("ERROR Dll refused to be loaded; aborting"));
280 DebugInt3();
281 delete pModule;
282 return 0;
283 }
284 }
285 pModule->incDynamicLib();
286 }
287 else DebugInt3();
288 }
289 }
290 }
291 return(ret);
292}
293//******************************************************************************
294//******************************************************************************
295BOOL Win32LxDll::isLxDll()
296{
297 return TRUE;
298}
299//******************************************************************************
300//******************************************************************************
301void Win32LxDll::setDllHandleOS2(HINSTANCE hInstanceOS2)
302{
303 //Loaded with LoadLibrary(Ex); no need for a 2nd DosLoadModule
304 //Dlls that are indirectly loaded (i.e. GDI32->KERNEL32 dependancy) need
305 //this additional DosLoadModule (and setDllHandleOS2 isn't called for those)
306 if(this->hinstanceOS2) {
307 DosFreeModule(this->hinstanceOS2);
308 }
309 this->hinstanceOS2 = hInstanceOS2;
310}
311//******************************************************************************
312//******************************************************************************
313Win32LxDll *Win32LxDll::findModuleByOS2Handle(HINSTANCE hinstance)
314{
315 dlllistmutex.enter();
316
317 Win32DllBase *mod = Win32DllBase::getFirst();
318 while(mod != NULL) {
319 if(mod->isLxDll()) {
320 Win32LxDll *lxdll = (Win32LxDll *)mod;
321 if(lxdll->hinstanceOS2 == hinstance) {
322 dlllistmutex.leave();
323 return(lxdll);
324 }
325 }
326 mod = mod->getNext();
327 }
328 dlllistmutex.leave();
329 return(NULL);
330}
331//******************************************************************************
332//******************************************************************************
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