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source: trunk/src/kernel32/winimagepe2lx.cpp@ 3430

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Last change on this file since 3430 was 3430, checked in by bird, 25 years ago
Corrected flaw in FP13 DosQuerySysState.
File size: 23.3 KB

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1	/* $Id: winimagepe2lx.cpp,v 1.9 2000-04-19 20:19:13 bird Exp $ */
2
3	/*
4	* Win32 PE2LX Image base class
5	*
6	* Copyright 1998-1999 Sander van Leeuwen (sandervl@xs4all.nl)
7	* Copyright 1998-1999 knut st. osmundsen (knut.stange.osmundsen@pmsc.no)
8	*
9	* Project Odin Software License can be found in LICENSE.TXT
10	*
11	*/
12
13	/*******************************************************************************
14	* Defined Constants And Macros *
15	*******************************************************************************/
16	#define INCL_DOSERRORS /* DOS Error values */
17	#define INCL_DOSPROFILE /* DosQuerySysState (Toolkit 4.5) */
18	#define INCL_DOSMODULEMGR /* DOS Module management */
19
20	#define ALIGN(a, alignment) (((a) + (alignment - 1UL)) & ~(alignment - 1UL))
21
22
23	/*******************************************************************************
24	* Header Files *
25	*******************************************************************************/
26	#include <os2wrap.h> //Odin32 OS/2 api wrappers
27
28	#include <malloc.h>
29	#include <process.h>
30	#include <stdlib.h>
31	#include <string.h>
32
33	#include <win32type.h>
34	#include <misc.h>
35	#include <winimagebase.h>
36	#include <winimagepe2lx.h>
37
38	#define DBG_LOCALLOG DBG_winimagepe2lx
39	#include "dbglocal.h"
40
41	/*******************************************************************************
42	* Structures and Typedefs *
43	*******************************************************************************/
44	#ifndef QS_MTE
45	/* From OS/2 Toolkit v4.5 (BSEDOS.H) */
46
47	/* Global Record structure
48	* Holds all global system information. Placed first in user buffer
49	*/
50	typedef struct qsGrec_s { /* qsGrec */
51	ULONG cThrds;
52	ULONG c32SSem;
53	ULONG cMFTNodes;
54	}qsGrec_t;
55
56	/*
57	* System wide MTE information
58	* ________________________________
59	* \| pNextRec \|----\|
60	* \|-------------------------------\| \|
61	* \| hmte \| \|
62	* \|-------------------------------\| \|
63	* \| ctImpMod \| \|
64	* \|-------------------------------\| \|
65	* \| ctObj \| \|
66	* \|-------------------------------\| \|
67	* \| pObjInfo \|----\|----------\|
68	* \|-------------------------------\| \| \|
69	* \| pName \|----\|----\| \|
70	* \|-------------------------------\| \| \| \|
71	* \| imported module handles \| \| \| \|
72	* \| . \| \| \| \|
73	* \| . \| \| \| \|
74	* \| . \| \| \| \|
75	* \|-------------------------------\| <--\|----\| \|
76	* \| "pathname" \| \| \|
77	* \|-------------------------------\| <--\|----------\|
78	* \| Object records \| \|
79	* \| (if requested) \| \|
80	* \|_______________________________\| \|
81	* <-----
82	* NOTE that if the level bit is set to QS_MTE, the base Lib record will be followed
83	* by a series of object records (qsLObj_t); one for each object of the
84	* module.
85	*/
86
87	typedef struct qsLObjrec_s { /* qsLOrec */
88	ULONG oaddr; /* object address */
89	ULONG osize; /* object size */
90	ULONG oflags; /* object flags */
91	} qsLObjrec_t;
92
93	typedef struct qsLrec_s { /* qsLrec */
94	void FAR pNextRec; / pointer to next record in buffer */
95	USHORT hmte; /* handle for this mte */
96	USHORT fFlat; /* true if 32 bit module */
97	ULONG ctImpMod; /* # of imported modules in table */
98	ULONG ctObj; /* # of objects in module (mte_objcnt)*/
99	qsLObjrec_t FAR pObjInfo; / pointer to per object info if any */
100	UCHAR FAR pName; / -> name string following struc */
101	} qsLrec_t;
102
103
104
105	/* Pointer Record Structure
106	* This structure is the first in the user buffer.
107	* It contains pointers to heads of record types that are loaded
108	* into the buffer.
109	*/
110
111	typedef struct qsPtrRec_s { /* qsPRec */
112	qsGrec_t *pGlobalRec;
113	void pProcRec; / ptr to head of process records */
114	void p16SemRec; / ptr to head of 16 bit sem recds */
115	void p32SemRec; / ptr to head of 32 bit sem recds */
116	void pMemRec; / ptr to head of shared mem recs */
117	qsLrec_t pLibRec; / ptr to head of mte records */
118	void pShrMemRec; / ptr to head of shared mem records */
119	void pFSRec; / ptr to head of file sys records */
120	} qsPtrRec_t;
121
122	#endif
123
124
125	/*******************************************************************************
126	* External Functions *
127	*******************************************************************************/
128	#ifndef QS_MTE
129	/* from OS/2 Toolkit v4.5 */
130
131	APIRET APIENTRY DosQuerySysState(ULONG EntityList, ULONG EntityLevel, PID pid,
132	TID tid, PVOID pDataBuf, ULONG cbBuf);
133	#define QS_MTE 0x0004
134	#endif
135
136
137
138	/**
139	* Constructor - creates an pe2lx image object from a module handle to a pe2lx module.
140	* @param hinstance OS/2 module handle.
141	* @param fWin32k TRUE: Win32k module.
142	* FALSE: Pe2Lx module.
143	* @status partially implemented.
144	* @author knut st. osmundsen, Sander van Leeuwen
145	*/
146	Win32Pe2LxImage::Win32Pe2LxImage(HINSTANCE hinstance, BOOL fWin32k)
147	: Win32ImageBase(hinstance),
148	paSections(NULL), cSections(0), pNtHdrs(NULL), fWin32k(fWin32k)
149	{
150	setFullPath(szFileName);
151	}
152
153
154	/**
155	* Free memory associated with this object.
156	* @status completely implemented.
157	* @author knut st. osmundsen, Sander van Leeuwen
158	*/
159	Win32Pe2LxImage::~Win32Pe2LxImage()
160	{
161	cleanup();
162	}
163
164
165	/**
166	* Initiates the object.
167	* Must be called immediately after the object construction.
168	* @returns Success indicator, TRUE == success; FALSE = failure.
169	* @sketch Get section placement and sizes for this module. (paSections, cSections)
170	* Verify that there is at least one section - the header section.
171	* Locate the NT headers.
172	* Set pNtHdrs pointer.
173	* Validate the NT headers.
174	* Read the PE section table the set the RVAs in paSections.
175	* Locate and set the entrypoint.
176	* Locate the resource directory (if any). (pResDir, ulRVAResourceSection)
177	* TLS - FIXME!
178	* @status completely implemented.
179	* @author knut st. osmundsen
180	* @remark Object must be destroyed if failure!
181	*/
182	BOOL Win32Pe2LxImage::init()
183	{
184	APIRET rc;
185
186	/* Get section placement and sizes for this module. (paSections, cSections) */
187	rc = getSections();
188	if (rc != NO_ERROR)
189	{
190	dprintf(("Win32Pe2LxImage::Win32Pe2LxImage: error - getSection failed with rc=%d\n",
191	rc));
192	return FALSE;
193	}
194
195	/* Verify that there is at least one section - the header section. */
196	if (cSections < 1)
197	{
198	dprintf(("Win32Pe2LxImage::Win32Pe2LxImage: no header section, cSections is 0\n"));
199	return FALSE;
200	}
201
202	/* Locate the NT headers. */
203	PIMAGE_DOS_HEADER pDosHdr = (PIMAGE_DOS_HEADER)paSections[0].ulAddress;
204	if ((pDosHdr->e_magic != IMAGE_DOS_SIGNATURE
205	\|\| pDosHdr->e_lfanew < sizeof(IMAGE_DOS_HEADER) /* Larger than 64 bytes */
206	\|\| pDosHdr->e_lfanew > 0x04000000UL /* or less that 64MB. */
207	)
208	&& !*(PDWORD)paSections[0].ulAddress == IMAGE_NT_SIGNATURE
209	)
210	{
211	dprintf(("Win32Pe2LxImage::Win32Pe2LxImage: Not a pe2lx image!(?)\n"));
212	return FALSE;
213	}
214
215	/* Set pNtHdrs pointer. */
216	if (pDosHdr->e_magic == IMAGE_DOS_SIGNATURE)
217	pNtHdrs = (PIMAGE_NT_HEADERS)(paSections[0].ulAddress + pDosHdr->e_lfanew);
218	else
219	pNtHdrs = (PIMAGE_NT_HEADERS)paSections[0].ulAddress;
220
221	/* Validate the NT headers. */
222	if (pNtHdrs->Signature != IMAGE_NT_SIGNATURE
223	\|\| pNtHdrs->OptionalHeader.Magic != IMAGE_NT_OPTIONAL_HDR_MAGIC
224	\|\| pNtHdrs->FileHeader.Machine != IMAGE_FILE_MACHINE_I386
225	\|\| (cSections != 1 /* all in one object */
226	&& pNtHdrs->FileHeader.NumberOfSections
227	> cSections - 1 - (pNtHdrs->FileHeader.Characteristics & IMAGE_FILE_DLL ? 0 : 1) /* hdr section and stack */
228	)
229	/* TODO: add more tests? */
230	)
231	{
232	dprintf(("Win32Pe2LxImage::Win32Pe2LxImage: Not a pe2lx image!(?)\n"));
233	return FALSE;
234	}
235
236	/* set RVAs */
237	rc = setSectionRVAs();
238	if (rc != NO_ERROR)
239	{
240	dprintf(("Win32Pe2LxImage::Win32Pe2LxImage: setSectionRVAs failed with rc=%d\n", rc));
241	return FALSE;
242	}
243
244	/* Locate and set the entrypoint. */
245	setEntryPoint((ULONG)getPointerFromRVA(pNtHdrs->OptionalHeader.AddressOfEntryPoint));
246	if (entryPoint == 0UL &&
247	(pNtHdrs->OptionalHeader.AddressOfEntryPoint != NULL /* getPointerFromRVA failed... */
248	\|\| !(pNtHdrs->FileHeader.Characteristics & IMAGE_FILE_DLL)) /* EXEs must have and entry point! */
249	)
250	{
251	dprintf(("Win32Pe2LxImage::Win32Pe2LxImage: entrypoint is incorrect, AddrOfEP=0x%08x, entryPoint=0x%08x\n",
252	pNtHdrs->OptionalHeader.AddressOfEntryPoint, entryPoint));
253	return FALSE;
254	}
255
256	/* Locate the resource directory (if any) */
257	if (pNtHdrs->OptionalHeader.NumberOfRvaAndSizes > IMAGE_DIRECTORY_ENTRY_RESOURCE
258	&& pNtHdrs->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_RESOURCE].VirtualAddress > 0UL)
259	{
260	ulRVAResourceSection = pNtHdrs->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_RESOURCE].VirtualAddress;
261	pResDir = (PIMAGE_RESOURCE_DIRECTORY)getPointerFromRVA(ulRVAResourceSection);
262	}
263
264	/* TLS - Thread Local Storage */
265	if (pNtHdrs->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_TLS].VirtualAddress != 0UL
266	&& pNtHdrs->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_TLS].Size != 0UL)
267	{
268	PIMAGE_TLS_DIRECTORY pTLSDir;
269	pTLSDir = (PIMAGE_TLS_DIRECTORY)getPointerFromRVA(pNtHdrs->OptionalHeader.
270	DataDirectory[IMAGE_DIRECTORY_ENTRY_TLS].
271	VirtualAddress);
272
273	if (pTLSDir != NULL)
274	{
275	PVOID pv;
276	pv = getPointerFromRVA(pTLSDir->StartAddressOfRawData);
277	if (pv == NULL \|\| pTLSDir->StartAddressOfRawData == 0UL)
278	{
279	eprintf(("Win32Pe2LxImage::init: invalid RVA to TLS StartAddressOfRawData - %#8x.\n",
280	pTLSDir->StartAddressOfRawData));
281	return FALSE;
282	}
283	setTLSAddress(pv);
284	setTLSInitSize(pTLSDir->EndAddressOfRawData - pTLSDir->StartAddressOfRawData);
285	setTLSTotalSize(pTLSDir->EndAddressOfRawData - pTLSDir->StartAddressOfRawData + pTLSDir->SizeOfZeroFill);
286	pv = getPointerFromRVA((ULONG)pTLSDir->AddressOfIndex);
287	if (pv == NULL)
288	{
289	eprintf(("Win32Pe2LxImage::init: invalid RVA to TLS AddressOffIndex - %#8x.\n",
290	pTLSDir->AddressOfIndex));
291	return FALSE;
292	}
293	setTLSIndexAddr((LPDWORD)pv);
294	pv = getPointerFromRVA((ULONG)pTLSDir->AddressOfCallBacks);
295	if (pv == NULL)
296	{
297	eprintf(("Win32Pe2LxImage::init: invalid RVA to TLS AddressOffIndex - %#8x.\n",
298	pTLSDir->AddressOfIndex));
299	return FALSE;
300	}
301	setTLSCallBackAddr((PIMAGE_TLS_CALLBACK*)pv);
302	}
303	else
304	{
305	eprintf(("Win32Pe2LxImage::init: invalid RVA to TLS Dir - %#8x. (getPointerFromRVA failed)\n",
306	pNtHdrs->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_TLS].VirtualAddress));
307	return FALSE;
308	}
309	}
310	return TRUE;
311	}
312
313
314
315	/**
316	* Gets the object layout for this module. Creates the paSections array.
317	* @returns OS2 errorcode. (NO_ERROR == success)
318	* @sketch Allocate output buffer.
319	* Call DosQuerySysState.
320	* IF buffer overflow THEN retry calling it with larger buffers, until buffer size is 1MB.
321	* IF success THEN
322	* BEGIN
323	* Find record for this module.
324	* IF record found THEN allocate memory for object table and copy it. (paSections, cSections)
325	* END
326	* @status Completely implemented.
327	* @author knut st. osmundsen
328	*/
329	ULONG Win32Pe2LxImage::getSections()
330	{
331	APIRET rc = NO_ERROR;
332	qsPtrRec_t * pPtrRec;
333	ULONG cbBuf = 65536;
334
335	pPtrRec = (qsPtrRec_t *)malloc(cbBuf);
336	if (pPtrRec != NULL)
337	{
338	rc = DosQuerySysState(QS_MTE, QS_MTE, getpid(), 0L, pPtrRec, cbBuf);
339	while (cbBuf < 1024*1024 && rc == ERROR_BUFFER_OVERFLOW)
340	{
341	PVOID pv = pPtrRec;
342	cbBuf += 65536;
343	pPtrRec = (qsPtrRec_t *)realloc(pv, cbBuf);
344	if (pPtrRec != NULL)
345	rc = DosQuerySysState(QS_MTE, QS_MTE, getpid(), 0L, pPtrRec, cbBuf);
346	else
347	{
348	rc = ERROR_NOT_ENOUGH_MEMORY;
349	free(pv);
350	}
351	}
352
353	if (rc == NO_ERROR)
354	{
355	qsLrec_t * pLrec = pPtrRec->pLibRec;
356	while (pLrec != NULL)
357	{
358	/*
359	* Bug detected in OS/2 FP13. Probably a problem which occurs
360	* in _LDRSysMteInfo when qsCheckCache is calle before writing
361	* object info. The result is that the cache flushed and the
362	* attempt of updating the qsLrec_t next and object pointer is
363	* not done. This used to work earlier and on Aurora AFAIK.
364	*
365	* The fix for this problem is to check if the pObjInfo is NULL
366	* while the number of objects isn't 0 and correct this. pNextRec
367	* will also be NULL at this time. This will be have to corrected
368	* before we exit the loop or moves to the next record.
369	* There is also a nasty alignment of the object info... Hope
370	* I got it right. (This aligment seems new to FP13.)
371	*/
372	if (pLrec->pObjInfo == NULL /&& pLrec->pNextRec == NULL/ && pLrec->ctObj > 0)
373	{
374	pLrec->pObjInfo = (qsLObjrec_t*)(
375	(char*)pLrec
376	+ ((sizeof(qsLrec_t) /* size of the lib record */
377	+ pLrec->ctImpMod * sizeof(short) /* size of the array of imported modules */
378	+ strlen((char)pLrec->pName) + 1 / size of the filename */
379	+ 3) & ~3)); /* the size is align on 4 bytes boundrary */
380	pLrec->pNextRec = (qsLrec_t)((char)pLrec->pObjInfo
381	+ sizeof(qsLObjrec_t) * pLrec->ctObj);
382	}
383	if (pLrec->hmte == hinstance)
384	break;
385
386	/*
387	* Next record
388	*/
389	pLrec = (qsLrec_t*)pLrec->pNextRec;
390	}
391
392
393	if (pLrec)
394	{
395	if (pLrec->pObjInfo != NULL)
396	{
397	/* Allocate memory for paSections */
398	paSections = (PSECTION)malloc(pLrec->ctObj*sizeof(SECTION));
399	if (paSections != NULL)
400	{
401	/* objects -> section array */
402	for (int i = 0; i < pLrec->ctObj; i++)
403	{
404	paSections[i].ulRVA = ~0UL;
405	paSections[i].cbVirtual = pLrec->pObjInfo[i].osize;
406	paSections[i].ulAddress = pLrec->pObjInfo[i].oaddr;
407	}
408	cSections = pLrec->ctObj;
409	}
410	else
411	rc = ERROR_NOT_ENOUGH_MEMORY;
412	}
413	else
414	{
415	rc = ERROR_BAD_EXE_FORMAT;
416	dprintf(("Win32Pe2LxImage::getSections: Error - no object table!\n"));
417	}
418	}
419	else
420	rc = ERROR_MOD_NOT_FOUND;
421	}
422	else
423	dprintf(("DosQuerySysState - failed with rc=%d (cbBuf=%d)\n", rc, cbBuf));
424
425	if (pPtrRec != NULL)
426	free(pPtrRec);
427	}
428	else
429	rc = ERROR_NOT_ENOUGH_MEMORY;
430
431	return rc;
432	}
433
434
435	/**
436	* Sets the ulRVA according to the original PE section table.
437	* @returns OS/2 errorcode. (NO_ERROR == success)
438	* @sketch DEBUG: Validate pNtHdrs
439	* Make pointer to start of PE section table.
440	* Set RVA for the header section.
441	* IF not all in one object exe? THEN
442	* Loop thru the sections in the PE section table.
443	* Note: due to the header section: PE section no. + 1 == LX object no.
444	* ELSE
445	* BEGIN
446	* (try) Reallocate paSections to NumberOfSections + 3.
447	* Loop thru the PE sections and make paSections from them.
448	* Add final Stack or TIBFix+Stack section if necessary.
449	* Resize header section.
450	* END
451	* @status completely implemented.
452	* @author knut st. osmundsen
453	* @remark Must not be called before pNtHdrs is set.
454	*/
455	ULONG Win32Pe2LxImage::setSectionRVAs()
456	{
457	#if DEBUG
458	if (pNtHdrs == NULL)
459	{
460	DebugInt3();
461	return ERROR_INVALID_PARAMETER;
462	}
463	#endif
464
465	PIMAGE_SECTION_HEADER paPESections = (PIMAGE_SECTION_HEADER)
466	((unsigned)pNtHdrs + sizeof(*pNtHdrs) +
467	(pNtHdrs->OptionalHeader.NumberOfRvaAndSizes - IMAGE_NUMBEROF_DIRECTORY_ENTRIES) * sizeof(IMAGE_DATA_DIRECTORY)
468	);
469
470	/* set RVA for the header section to 0UL. */
471	paSections[0].ulRVA = 0UL;
472
473	/* All in one object exe? */
474	if (pNtHdrs->FileHeader.NumberOfSections < cSections)
475	{
476	/* loop thru the other sections */
477	for (int i = 0; i < pNtHdrs->FileHeader.NumberOfSections; i++)
478	paSections[i+1].ulRVA = paPESections[i].VirtualAddress;
479	}
480	else
481	{ /* all in one object */
482	/* (try) Reallocate paSections to NumberOfSections + 3. */
483	PVOID pv = realloc(paSections, sizeof(paSections[0]) * (pNtHdrs->FileHeader.NumberOfSections + 3));
484	if (pv != NULL)
485	{
486	paSections = (PSECTION)pv;
487
488	/* loop thru the PE sections */
489	for (int i = 0; i < pNtHdrs->FileHeader.NumberOfSections; i++)
490	{
491	if (paSections[0].cbVirtual < paPESections[i].VirtualAddress)
492	{
493	dprintf(("Win32Pe2LxImage::setSectionRVAs: mismatch between section table and all-in-one-object"
494	"paSections[0].cbVirtual %#x paPESections[i].VirtualAddress %#x\n",
495	paSections[0].cbVirtual, paPESections[i].VirtualAddress
496	));
497	return ERROR_BAD_EXE_FORMAT;
498	}
499	paSections[i+1].ulRVA = paPESections[i].VirtualAddress;
500	paSections[i+1].cbVirtual = max(paPESections[i].Misc.VirtualSize, paPESections[i].SizeOfRawData);
501	paSections[i+1].ulAddress = paSections[0].ulAddress + paPESections[i].VirtualAddress;
502	}
503	cSections = pNtHdrs->FileHeader.NumberOfSections + 1;
504
505	/* add final Stack or TIBFix+Stack section if necessary */
506	if (paSections[0].cbVirtual > paSections[i].ulRVA + ALIGN(paSections[i].cbVirtual, 0x1000))
507	{
508	paSections[i+1].ulRVA = ~0UL;
509	paSections[i+1].cbVirtual = paSections[0].cbVirtual - paSections[i].ulRVA + ALIGN(paSections[i].cbVirtual, 0x1000);
510	paSections[i+1].ulAddress = paSections[i].ulAddress + ALIGN(paSections[i].cbVirtual, 0x1000);
511	i++;
512	cSections++;
513	}
514
515	/* resize header section */
516	paSections[0].cbVirtual = paSections[1].ulRVA; /..../
517	}
518	else
519	return ERROR_NOT_ENOUGH_MEMORY;
520	}
521
522	return NO_ERROR;
523	}
524
525
526	/**
527	* Frees memory used by this object.
528	* When an exception is to be thrown, this function is called first to clean up
529	* the object. Base class(es) are automatically clean up by theire destructor(s).
530	* @status completely implemented.
531	* @author knut st. osmundsen
532	*/
533	VOID Win32Pe2LxImage::cleanup()
534	{
535	if (paSections != NULL)
536	{
537	free(paSections);
538	paSections = NULL;
539	cSections = 0;
540	}
541	}
542
543
544	/**
545	* Converts a RVA to an pointer.
546	* @returns Pointer matching the given RVA, NULL on error.
547	* @param ulRVA An address relative to the imagebase of the original PE image.
548	* If this is 0UL NULL is returned.
549	* @sketch DEBUG: validate state, paSections != NULL
550	* IF ulRVA is 0 THEN return NULL
551	* LOOP while more section left and ulRVA is not within section
552	* next section
553	* IF section matching ulRVA is not found THEN fail.
554	* return pointer matching RVA.
555	* @status completely implemented.
556	* @author knut st. osmundsen
557	* @remark Should not be called until getSections has returned successfully.
558	* RVA == 0 is ignored.
559	*/
560	PVOID Win32Pe2LxImage::getPointerFromRVA(ULONG ulRVA)
561	{
562	int i;
563	#ifdef DEBUG
564	if (paSections == NULL)
565	return NULL;
566	#endif
567
568	if (ulRVA == 0UL)
569	return NULL;
570
571	i = 0;
572	while (i < cSections &&
573	!(paSections[i].ulRVA <= ulRVA && paSections[i].ulRVA + paSections[i].cbVirtual > ulRVA)) /* ALIGN on page too? */
574	i++;
575
576	if (i >= cSections)
577	return NULL;
578
579	return (PVOID)(ulRVA - paSections[i].ulRVA + paSections[i].ulAddress);
580	}
581
582	/**
583	* Gets pointer to an exported procedure by procedure name.
584	* @returns Address of exported procedure. 0UL if not found.
585	* @param name Exported procedure name.
586	* @status completely implemented.
587	* @author Sander van Leeuwen
588	* @remark
589	*/
590	ULONG Win32Pe2LxImage::getApi(char *name)
591	{
592	APIRET rc;
593	ULONG ulApiAddr;
594
595	rc = DosQueryProcAddr(hinstance, 0, name, (PFN *)&ulApiAddr);
596	return rc == NO_ERROR ? ulApiAddr : 0;
597	}
598
599
600	/**
601	* Gets pointer to an exported procedure by ordinal.
602	* @returns Pointer to an exported procedure. 0UL if not found.
603	* @param ordinal Export ordinal number.
604	* @status completely implemented.
605	* @author Sander van Leeuwen
606	* @remark FIXME:
607	* This function should be implemented for both Exe and Dll images!
608	* It could be done similar in both peldr image and pe2lx images by
609	* accessing PE structures.
610	*/
611	ULONG Win32Pe2LxImage::getApi(int ordinal)
612	{
613	APIRET rc;
614	ULONG ulApiAddr;
615
616	rc = DosQueryProcAddr(hinstance, ordinal, NULL, (PFN *)&ulApiAddr);
617
618	return rc == NO_ERROR ? ulApiAddr : 0;
619	}

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