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source: trunk/src/kernel32/winimagepe2lx.cpp@ 4357

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Last change on this file since 4357 was 4357, checked in by bird, 25 years ago
Made corrections for Borland TLS. (Beyond Compare works now)
File size: 29.9 KB

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1	/* $Id: winimagepe2lx.cpp,v 1.16 2000-10-02 04:00:35 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	#include "Win32k.h"
38
39	#define DBG_LOCALLOG DBG_winimagepe2lx
40	#include "dbglocal.h"
41
42	/*******************************************************************************
43	* Structures and Typedefs *
44	*******************************************************************************/
45	#ifndef QS_MTE
46	/* From OS/2 Toolkit v4.5 (BSEDOS.H) */
47
48	/* Global Record structure
49	* Holds all global system information. Placed first in user buffer
50	*/
51	typedef struct qsGrec_s { /* qsGrec */
52	ULONG cThrds;
53	ULONG c32SSem;
54	ULONG cMFTNodes;
55	}qsGrec_t;
56
57	/*
58	* System wide MTE information
59	* ________________________________
60	* \| pNextRec \|----\|
61	* \|-------------------------------\| \|
62	* \| hmte \| \|
63	* \|-------------------------------\| \|
64	* \| ctImpMod \| \|
65	* \|-------------------------------\| \|
66	* \| ctObj \| \|
67	* \|-------------------------------\| \|
68	* \| pObjInfo \|----\|----------\|
69	* \|-------------------------------\| \| \|
70	* \| pName \|----\|----\| \|
71	* \|-------------------------------\| \| \| \|
72	* \| imported module handles \| \| \| \|
73	* \| . \| \| \| \|
74	* \| . \| \| \| \|
75	* \| . \| \| \| \|
76	* \|-------------------------------\| <--\|----\| \|
77	* \| "pathname" \| \| \|
78	* \|-------------------------------\| <--\|----------\|
79	* \| Object records \| \|
80	* \| (if requested) \| \|
81	* \|_______________________________\| \|
82	* <-----
83	* NOTE that if the level bit is set to QS_MTE, the base Lib record will be followed
84	* by a series of object records (qsLObj_t); one for each object of the
85	* module.
86	*/
87
88	typedef struct qsLObjrec_s { /* qsLOrec */
89	ULONG oaddr; /* object address */
90	ULONG osize; /* object size */
91	ULONG oflags; /* object flags */
92	} qsLObjrec_t;
93
94	typedef struct qsLrec_s { /* qsLrec */
95	void FAR pNextRec; / pointer to next record in buffer */
96	USHORT hmte; /* handle for this mte */
97	USHORT fFlat; /* true if 32 bit module */
98	ULONG ctImpMod; /* # of imported modules in table */
99	ULONG ctObj; /* # of objects in module (mte_objcnt)*/
100	qsLObjrec_t FAR pObjInfo; / pointer to per object info if any */
101	UCHAR FAR pName; / -> name string following struc */
102	} qsLrec_t;
103
104
105
106	/* Pointer Record Structure
107	* This structure is the first in the user buffer.
108	* It contains pointers to heads of record types that are loaded
109	* into the buffer.
110	*/
111
112	typedef struct qsPtrRec_s { /* qsPRec */
113	qsGrec_t *pGlobalRec;
114	void pProcRec; / ptr to head of process records */
115	void p16SemRec; / ptr to head of 16 bit sem recds */
116	void p32SemRec; / ptr to head of 32 bit sem recds */
117	void pMemRec; / ptr to head of shared mem recs */
118	qsLrec_t pLibRec; / ptr to head of mte records */
119	void pShrMemRec; / ptr to head of shared mem records */
120	void pFSRec; / ptr to head of file sys records */
121	} qsPtrRec_t;
122
123	#endif
124
125
126	/*******************************************************************************
127	* External Functions *
128	*******************************************************************************/
129	#ifndef QS_MTE
130	/* from OS/2 Toolkit v4.5 */
131
132	APIRET APIENTRY DosQuerySysState(ULONG EntityList, ULONG EntityLevel, PID pid,
133	TID tid, PVOID pDataBuf, ULONG cbBuf);
134	#define QS_MTE 0x0004
135	#endif
136
137
138
139	/**
140	* Constructor - creates an pe2lx image object from a module handle to a pe2lx module.
141	* @param hinstance OS/2 module handle.
142	* @param fWin32k TRUE: Win32k module.
143	* FALSE: Pe2Lx module.
144	* @status partially implemented.
145	* @author knut st. osmundsen, Sander van Leeuwen
146	*/
147	Win32Pe2LxImage::Win32Pe2LxImage(HINSTANCE hinstance, BOOL fWin32k)
148	: Win32ImageBase(hinstance),
149	paSections(NULL), cSections(0), pNtHdrs(NULL), fWin32k(fWin32k),
150	hmod(hinstance)
151	{
152	setFullPath(szFileName);
153	}
154
155
156	/**
157	* Free memory associated with this object.
158	* @status completely implemented.
159	* @author knut st. osmundsen, Sander van Leeuwen
160	*/
161	Win32Pe2LxImage::~Win32Pe2LxImage()
162	{
163	cleanup();
164	}
165
166
167	/**
168	* Initiates the object.
169	* Must be called immediately after the object construction.
170	* @returns Success indicator, TRUE == success; FALSE = failure.
171	* @sketch Get section placement and sizes for this module. (paSections, cSections)
172	* Verify that there is at least one section - the header section.
173	* Locate the NT headers.
174	* Set pNtHdrs pointer.
175	* Validate the NT headers.
176	* Read the PE section table the set the RVAs in paSections.
177	* Set instance handle to address of header.
178	* Locate and set the entrypoint.
179	* Locate the resource directory (if any). (pResRootDir, ulRVAResourceSection)
180	* TLS - FIXME!
181	* @status completely implemented.
182	* @author knut st. osmundsen
183	* @remark Object must be destroyed if failure!
184	*/
185	BOOL Win32Pe2LxImage::init()
186	{
187	APIRET rc;
188
189	/* Get section placement and sizes for this module. (paSections, cSections) */
190	rc = getSections();
191	if (rc != NO_ERROR)
192	{
193	dprintf(("Win32Pe2LxImage::Win32Pe2LxImage: error - getSection failed with rc=%d\n",
194	rc));
195	return FALSE;
196	}
197
198	/* Verify that there is at least one section - the header section. */
199	if (cSections < 1)
200	{
201	dprintf(("Win32Pe2LxImage::Win32Pe2LxImage: no header section, cSections is 0\n"));
202	return FALSE;
203	}
204
205	/* Locate the NT headers. */
206	PIMAGE_DOS_HEADER pDosHdr = (PIMAGE_DOS_HEADER)paSections[0].ulAddress;
207	if ((pDosHdr->e_magic != IMAGE_DOS_SIGNATURE
208	\|\| pDosHdr->e_lfanew < sizeof(IMAGE_DOS_HEADER) /* Larger than 64 bytes */
209	\|\| pDosHdr->e_lfanew > 0x04000000UL /* or less that 64MB. */
210	)
211	&& !*(PDWORD)paSections[0].ulAddress == IMAGE_NT_SIGNATURE
212	)
213	{
214	dprintf(("Win32Pe2LxImage::Win32Pe2LxImage: Not a pe2lx image!(?)\n"));
215	return FALSE;
216	}
217
218	/* Set pNtHdrs pointer. */
219	if (pDosHdr->e_magic == IMAGE_DOS_SIGNATURE)
220	pNtHdrs = (PIMAGE_NT_HEADERS)(paSections[0].ulAddress + pDosHdr->e_lfanew);
221	else
222	pNtHdrs = (PIMAGE_NT_HEADERS)paSections[0].ulAddress;
223
224	/* Validate the NT headers. */
225	if (pNtHdrs->Signature != IMAGE_NT_SIGNATURE
226	\|\| pNtHdrs->OptionalHeader.Magic != IMAGE_NT_OPTIONAL_HDR_MAGIC
227	\|\| pNtHdrs->FileHeader.Machine != IMAGE_FILE_MACHINE_I386
228	\|\| (cSections != 1 /* all in one object */
229	&& pNtHdrs->FileHeader.NumberOfSections
230	> cSections - 1 - (pNtHdrs->FileHeader.Characteristics & IMAGE_FILE_DLL ? 0 : 1) /* hdr section and stack */
231	)
232	/* TODO: add more tests? */
233	)
234	{
235	dprintf(("Win32Pe2LxImage::Win32Pe2LxImage: Not a pe2lx image!(?)\n"));
236	return FALSE;
237	}
238
239	/* set RVAs */
240	rc = setSectionRVAs();
241	if (rc != NO_ERROR)
242	{
243	dprintf(("Win32Pe2LxImage::Win32Pe2LxImage: setSectionRVAs failed with rc=%d\n", rc));
244	return FALSE;
245	}
246
247	/* Set instance handle to address of header. */
248	hinstance = (HINSTANCE)paSections[0].ulAddress;
249
250	/* Locate and set the entrypoint. */
251	setEntryPoint((ULONG)getPointerFromRVA(pNtHdrs->OptionalHeader.AddressOfEntryPoint));
252	if (entryPoint == 0UL &&
253	(pNtHdrs->OptionalHeader.AddressOfEntryPoint != NULL /* getPointerFromRVA failed... */
254	\|\| !(pNtHdrs->FileHeader.Characteristics & IMAGE_FILE_DLL)) /* EXEs must have and entry point! */
255	)
256	{
257	dprintf(("Win32Pe2LxImage::Win32Pe2LxImage: entrypoint is incorrect, AddrOfEP=0x%08x, entryPoint=0x%08x\n",
258	pNtHdrs->OptionalHeader.AddressOfEntryPoint, entryPoint));
259	return FALSE;
260	}
261
262	/* Locate the resource directory (if any) */
263	if (pNtHdrs->OptionalHeader.NumberOfRvaAndSizes > IMAGE_DIRECTORY_ENTRY_RESOURCE
264	&& pNtHdrs->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_RESOURCE].VirtualAddress > 0UL)
265	{
266	ulRVAResourceSection = pNtHdrs->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_RESOURCE].VirtualAddress;
267	pResRootDir = (PIMAGE_RESOURCE_DIRECTORY)getPointerFromRVA(ulRVAResourceSection);
268	/* _temporary_ fix:
269	* We'll have to make the resource section writable.
270	* And we'll have to make the pages before it readable.
271	*/
272	LONG iSection = getSectionIndexFromRVA(ulRVAResourceSection);
273	if (iSection >= 0)
274	{
275	rc = DosSetMem((PVOID)paSections[iSection].ulAddress, paSections[iSection].cbVirtual, PAG_WRITE \| PAG_READ);
276
277	ULONG ulAddr = paSections[iSection].ulAddress - 0x10000; //64KB
278	while (ulAddr < paSections[iSection].ulAddress)
279	{
280	ULONG fl = ~0UL;
281	ULONG cb = ~0UL;
282	rc = DosQueryMem((PVOID)ulAddr, &cb, &fl);
283	if (rc == NO_ERROR)
284	{
285	if (fl & PAG_GUARD)
286	rc = -1;
287	else if (fl & PAG_COMMIT)
288	fl &= ~(PAG_COMMIT);
289	else
290	fl \|= PAG_COMMIT;
291	cb = (cb + 0xfffUL) & ~0xfffUL;
292	}
293	else
294	{
295	fl = PAG_COMMIT;
296	cb = 0x1000;
297	}
298	fl &= PAG_READ \| PAG_COMMIT \| PAG_WRITE \| PAG_GUARD;
299	fl \|= PAG_READ;
300	if (cb > paSections[iSection].ulAddress - ulAddr)
301	cb = paSections[iSection].ulAddress - ulAddr;
302	if (rc == NO_ERROR)
303	rc = DosSetMem((PVOID)ulAddr, cb, fl);
304
305	ulAddr += cb;
306	}
307	}
308	}
309
310	/* TLS - Thread Local Storage */
311	if (pNtHdrs->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_TLS].VirtualAddress != 0UL
312	&& pNtHdrs->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_TLS].Size != 0UL)
313	{
314	PIMAGE_TLS_DIRECTORY pTLSDir;
315	LONG iSection;
316	iSection = getSectionIndexFromRVA(pNtHdrs->OptionalHeader.
317	DataDirectory[IMAGE_DIRECTORY_ENTRY_TLS].
318	VirtualAddress);
319	pTLSDir = (PIMAGE_TLS_DIRECTORY)getPointerFromRVA(pNtHdrs->OptionalHeader.
320	DataDirectory[IMAGE_DIRECTORY_ENTRY_TLS].
321	VirtualAddress);
322
323	if (pTLSDir != NULL && iSection != -1)
324	{
325	PVOID pv;
326	ULONG ulBorlandRVAFix = 0UL;
327
328	/*
329	* Borland seems to have problems getting things right...
330	* Uses real pointers with baserelocations.
331	* Needs to subtract image loadaddress to make the TLSDir them RVAs.
332	*
333	* We'll check if the StartAddressOfRawData pointer is an RVA or an real address by
334	* check if it is within the TLS section or not.
335	* ASSUMES: StartAddressOfRawData is in the same section as the TLS Directory.
336	*/
337	if (paSections[iSection].ulRVA > pTLSDir->StartAddressOfRawData \|\|
338	paSections[iSection].ulRVA + paSections[iSection].cbVirtual <= pTLSDir->StartAddressOfRawData)
339	{ /* StartAddressOfRawData was not an RVA within the same section as the TLS directory */
340	ulBorlandRVAFix = paSections[iSection].ulAddress - paSections[iSection].ulRVA;
341	}
342	pv = getPointerFromRVA(pTLSDir->StartAddressOfRawData - ulBorlandRVAFix);
343	if (pv == NULL \|\| pTLSDir->StartAddressOfRawData == 0UL)
344	{
345	eprintf(("Win32Pe2LxImage::init: invalid RVA to TLS StartAddressOfRawData - %#8x.\n",
346	pTLSDir->StartAddressOfRawData));
347	return FALSE;
348	}
349	setTLSAddress(pv);
350	setTLSInitSize(pTLSDir->EndAddressOfRawData - pTLSDir->StartAddressOfRawData);
351	setTLSTotalSize(pTLSDir->EndAddressOfRawData - pTLSDir->StartAddressOfRawData + pTLSDir->SizeOfZeroFill);
352	pv = getPointerFromRVA((ULONG)pTLSDir->AddressOfIndex - ulBorlandRVAFix);
353	if (pv == NULL)
354	{
355	eprintf(("Win32Pe2LxImage::init: invalid RVA to TLS AddressOffIndex - %#8x.\n",
356	pTLSDir->AddressOfIndex));
357	return FALSE;
358	}
359	setTLSIndexAddr((LPDWORD)pv);
360	if (pTLSDir->AddressOfCallBacks != 0)
361	{
362	pv = getPointerFromRVA((ULONG)pTLSDir->AddressOfCallBacks - ulBorlandRVAFix);
363	if (pv == NULL)
364	{
365	eprintf(("Win32Pe2LxImage::init: invalid RVA to TLS AddressOffIndex - %#8x.\n",
366	pTLSDir->AddressOfIndex));
367	return FALSE;
368	}
369	setTLSCallBackAddr((PIMAGE_TLS_CALLBACK*)pv);
370	}
371	}
372	else
373	{
374	eprintf(("Win32Pe2LxImage::init: invalid RVA to TLS Dir - %#8x. (getPointerFromRVA failed)\n",
375	pNtHdrs->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_TLS].VirtualAddress));
376	return FALSE;
377	}
378	}
379	return TRUE;
380	}
381
382
383
384	/**
385	* Gets the object layout for this module. Creates the paSections array.
386	* @returns OS2 errorcode. (NO_ERROR == success)
387	* @sketch Allocate output buffer.
388	* Call DosQuerySysState.
389	* IF buffer overflow THEN retry calling it with larger buffers, until buffer size is 1MB.
390	* IF success THEN
391	* BEGIN
392	* Find record for this module.
393	* IF record found THEN allocate memory for object table and copy it. (paSections, cSections)
394	* END
395	* @status Completely implemented.
396	* @author knut st. osmundsen
397	*/
398	ULONG Win32Pe2LxImage::getSections()
399	{
400	APIRET rc = NO_ERROR;
401
402	/*
403	* If Win32k.sys is installed we'll use it.
404	*/
405	if (libWin32kInstalled())
406	{
407	ULONG cbQte = sizeof(QOTEBUFFER) + sizeof(QOTE)*20;
408	PQOTEBUFFER pQOte = (PQOTEBUFFER)malloc(sizeof(QOTEBUFFER) + sizeof(QOTE)*20);
409	if (pQOte != NULL)
410	{
411	/*
412	* Get the query OTEs for this module.
413	* If there is a buffer overflow we'll allocate more storage and retry.
414	*/
415	rc = W32kQueryOTEs(hmod, pQOte, cbQte);
416	while (rc == ERROR_BUFFER_OVERFLOW && cbQte < 32000);
417	{
418	PVOID pvOld = pQOte;
419	cbQte += sizeof(QOTE) * 20;
420	pQOte = (PQOTEBUFFER)realloc(pQOte, cbQte);
421	if (pQOte == NULL)
422	{
423	free(pvOld);
424	return ERROR_NOT_ENOUGH_MEMORY;
425	}
426
427	rc = W32kQueryOTEs(hmod, pQOte, cbQte);
428	}
429
430	/*
431	* If successfully got the OTEs then allocate and set paSections structs.
432	*/
433	if (rc == NO_ERROR)
434	{
435	/* Allocate memory for paSections */
436	paSections = (PSECTION)malloc(pQOte->cOTEs * sizeof(SECTION));
437	if (paSections != NULL)
438	{
439	/* objects -> section array */
440	for (int i = 0; i < pQOte->cOTEs; i++)
441	{
442	paSections[i].ulRVA = ~0UL;
443	paSections[i].cbVirtual = pQOte->aOTE[i].ote_size;
444	paSections[i].ulAddress = pQOte->aOTE[i].ote_base;
445	}
446	cSections = pQOte->cOTEs;
447	}
448	else
449	rc = ERROR_NOT_ENOUGH_MEMORY;
450	}
451	else
452	{
453	dprintf(("Win32Pe2LxImage::getSections: libW32kQueryOTEs failed with rc=%d."
454	" Falls back on the DosQuerySysState method.\n", rc));
455	}
456	}
457	else
458	{ /* server error, no use in trying the fallback method. */
459	dprintf(("Win32Pe2LxImage::getSections: malloc failed\n"));
460	return ERROR_NOT_ENOUGH_MEMORY;
461	}
462
463	if (rc == NO_ERROR)
464	return rc;
465	}
466
467
468	/*
469	* Fallback method, using DosQuerySysState.
470	*/
471	qsPtrRec_t * pPtrRec;
472	ULONG cbBuf = 65536;
473
474	pPtrRec = (qsPtrRec_t *)malloc(cbBuf);
475	if (pPtrRec != NULL)
476	{
477	rc = DosQuerySysState(QS_MTE, QS_MTE, getpid(), 0L, pPtrRec, cbBuf);
478	while (cbBuf < 1024*1024 && rc == ERROR_BUFFER_OVERFLOW)
479	{
480	PVOID pv = pPtrRec;
481	cbBuf += 65536;
482	pPtrRec = (qsPtrRec_t *)realloc(pv, cbBuf);
483	if (pPtrRec != NULL)
484	rc = DosQuerySysState(QS_MTE, QS_MTE, getpid(), 0L, pPtrRec, cbBuf);
485	else
486	{
487	rc = ERROR_NOT_ENOUGH_MEMORY;
488	free(pv);
489	}
490	}
491
492	if (rc == NO_ERROR)
493	{
494	qsLrec_t * pLrec = pPtrRec->pLibRec;
495	while (pLrec != NULL)
496	{
497	/*
498	* Bug detected in OS/2 FP13. Probably a problem which occurs
499	* in _LDRSysMteInfo when qsCheckCache is calle before writing
500	* object info. The result is that the cache flushed and the
501	* attempt of updating the qsLrec_t next and object pointer is
502	* not done. This used to work earlier and on Aurora AFAIK.
503	*
504	* The fix for this problem is to check if the pObjInfo is NULL
505	* while the number of objects isn't 0 and correct this. pNextRec
506	* will also be NULL at this time. This will be have to corrected
507	* before we exit the loop or moves to the next record.
508	* There is also a nasty alignment of the object info... Hope
509	* I got it right. (This aligment seems new to FP13.)
510	*/
511	if (pLrec->pObjInfo == NULL /&& pLrec->pNextRec == NULL/ && pLrec->ctObj > 0)
512	{
513	pLrec->pObjInfo = (qsLObjrec_t*)(
514	(char*)pLrec
515	+ ((sizeof(qsLrec_t) /* size of the lib record */
516	+ pLrec->ctImpMod * sizeof(short) /* size of the array of imported modules */
517	+ strlen((char)pLrec->pName) + 1 / size of the filename */
518	+ 3) & ~3)); /* the size is align on 4 bytes boundrary */
519	pLrec->pNextRec = (qsLrec_t)((char)pLrec->pObjInfo
520	+ sizeof(qsLObjrec_t) * pLrec->ctObj);
521	}
522	if (pLrec->hmte == hmod)
523	break;
524
525	/*
526	* Next record
527	*/
528	pLrec = (qsLrec_t*)pLrec->pNextRec;
529	}
530
531
532	if (pLrec)
533	{
534	if (pLrec->pObjInfo != NULL)
535	{
536	/* Allocate memory for paSections */
537	paSections = (PSECTION)malloc(pLrec->ctObj*sizeof(SECTION));
538	if (paSections != NULL)
539	{
540	/* objects -> section array */
541	for (int i = 0; i < pLrec->ctObj; i++)
542	{
543	paSections[i].ulRVA = ~0UL;
544	paSections[i].cbVirtual = pLrec->pObjInfo[i].osize;
545	paSections[i].ulAddress = pLrec->pObjInfo[i].oaddr;
546	}
547	cSections = pLrec->ctObj;
548	}
549	else
550	rc = ERROR_NOT_ENOUGH_MEMORY;
551	}
552	else
553	{
554	rc = ERROR_BAD_EXE_FORMAT;
555	dprintf(("Win32Pe2LxImage::getSections: Error - no object table!\n"));
556	}
557	}
558	else
559	rc = ERROR_MOD_NOT_FOUND;
560	}
561	else
562	dprintf(("DosQuerySysState - failed with rc=%d (cbBuf=%d)\n", rc, cbBuf));
563
564	if (pPtrRec != NULL)
565	free(pPtrRec);
566	}
567	else
568	rc = ERROR_NOT_ENOUGH_MEMORY;
569
570	return rc;
571	}
572
573
574	/**
575	* Sets the ulRVA according to the original PE section table.
576	* @returns OS/2 errorcode. (NO_ERROR == success)
577	* @sketch DEBUG: Validate pNtHdrs
578	* Make pointer to start of PE section table.
579	* Set RVA for the header section.
580	* IF not all in one object exe? THEN
581	* Loop thru the sections in the PE section table.
582	* Note: due to the header section: PE section no. + 1 == LX object no.
583	* ELSE
584	* BEGIN
585	* (try) Reallocate paSections to NumberOfSections + 3.
586	* Loop thru the PE sections and make paSections from them.
587	* Add final Stack or TIBFix+Stack section if necessary.
588	* Resize header section.
589	* END
590	* @status completely implemented.
591	* @author knut st. osmundsen
592	* @remark Must not be called before pNtHdrs is set.
593	*/
594	ULONG Win32Pe2LxImage::setSectionRVAs()
595	{
596	#if DEBUG
597	if (pNtHdrs == NULL)
598	{
599	DebugInt3();
600	return ERROR_INVALID_PARAMETER;
601	}
602	#endif
603
604	PIMAGE_SECTION_HEADER paPESections = (PIMAGE_SECTION_HEADER)
605	((unsigned)pNtHdrs + sizeof(*pNtHdrs) +
606	(pNtHdrs->OptionalHeader.NumberOfRvaAndSizes - IMAGE_NUMBEROF_DIRECTORY_ENTRIES) * sizeof(IMAGE_DATA_DIRECTORY)
607	);
608
609	/* set RVA for the header section to 0UL. */
610	paSections[0].ulRVA = 0UL;
611
612	/* All in one object exe? */
613	if (pNtHdrs->FileHeader.NumberOfSections < cSections)
614	{
615	/* loop thru the other sections */
616	for (int i = 0; i < pNtHdrs->FileHeader.NumberOfSections; i++)
617	paSections[i+1].ulRVA = paPESections[i].VirtualAddress;
618	}
619	else
620	{ /* all in one object */
621	/* (try) Reallocate paSections to NumberOfSections + 3. */
622	PVOID pv = realloc(paSections, sizeof(paSections[0]) * (pNtHdrs->FileHeader.NumberOfSections + 3));
623	if (pv != NULL)
624	{
625	paSections = (PSECTION)pv;
626
627	/* loop thru the PE sections */
628	for (int i = 0; i < pNtHdrs->FileHeader.NumberOfSections; i++)
629	{
630	if (paSections[0].cbVirtual < paPESections[i].VirtualAddress)
631	{
632	dprintf(("Win32Pe2LxImage::setSectionRVAs: mismatch between section table and all-in-one-object"
633	"paSections[0].cbVirtual %#x paPESections[i].VirtualAddress %#x\n",
634	paSections[0].cbVirtual, paPESections[i].VirtualAddress
635	));
636	return ERROR_BAD_EXE_FORMAT;
637	}
638	paSections[i+1].ulRVA = paPESections[i].VirtualAddress;
639	paSections[i+1].cbVirtual = max(paPESections[i].Misc.VirtualSize, paPESections[i].SizeOfRawData);
640	paSections[i+1].ulAddress = paSections[0].ulAddress + paPESections[i].VirtualAddress;
641	}
642	cSections = pNtHdrs->FileHeader.NumberOfSections + 1;
643
644	/* add final Stack or TIBFix+Stack section if necessary */
645	if (paSections[0].cbVirtual > paSections[i].ulRVA + ALIGN(paSections[i].cbVirtual, 0x1000))
646	{
647	paSections[i+1].ulRVA = ~0UL;
648	paSections[i+1].cbVirtual = paSections[0].cbVirtual - paSections[i].ulRVA + ALIGN(paSections[i].cbVirtual, 0x1000);
649	paSections[i+1].ulAddress = paSections[i].ulAddress + ALIGN(paSections[i].cbVirtual, 0x1000);
650	i++;
651	cSections++;
652	}
653
654	/* resize header section */
655	paSections[0].cbVirtual = paSections[1].ulRVA; /..../
656	}
657	else
658	return ERROR_NOT_ENOUGH_MEMORY;
659	}
660
661	return NO_ERROR;
662	}
663
664
665	/**
666	* Frees memory used by this object.
667	* When an exception is to be thrown, this function is called first to clean up
668	* the object. Base class(es) are automatically clean up by theire destructor(s).
669	* @status completely implemented.
670	* @author knut st. osmundsen
671	*/
672	VOID Win32Pe2LxImage::cleanup()
673	{
674	if (paSections != NULL)
675	{
676	free(paSections);
677	paSections = NULL;
678	cSections = 0;
679	}
680	}
681
682
683	/**
684	* Converts a RVA into a pointer.
685	* @returns Pointer matching the given RVA, NULL on error.
686	* @param ulRVA An address relative to the imagebase of the original PE image.
687	* If this is 0UL NULL is returned.
688	* @sketch DEBUG: validate state, paSections != NULL
689	* IF ulRVA is 0 THEN return NULL
690	* LOOP while more section left and ulRVA is not within section
691	* next section
692	* IF section matching ulRVA is not found THEN fail.
693	* return pointer matching RVA.
694	* @status completely implemented.
695	* @author knut st. osmundsen
696	* @remark Should not be called until getSections has returned successfully.
697	* RVA == 0 is ignored.
698	*/
699	PVOID Win32Pe2LxImage::getPointerFromRVA(ULONG ulRVA)
700	{
701	int i;
702	#ifdef DEBUG
703	if (paSections == NULL)
704	return NULL;
705	#endif
706
707	if (ulRVA == 0UL)
708	return NULL;
709
710	i = 0;
711	while (i < cSections &&
712	!(paSections[i].ulRVA <= ulRVA && paSections[i].ulRVA + paSections[i].cbVirtual > ulRVA)) /* ALIGN on page too? */
713	i++;
714
715	if (i >= cSections)
716	return NULL;
717
718	return (PVOID)(ulRVA - paSections[i].ulRVA + paSections[i].ulAddress);
719	}
720
721
722	/**
723	* Converts a RVA into a paSections index.
724	* @returns Index into paSections for the section containing the RVA.
725	* -1 on error.
726	* @param ulRVA An address relative to the imagebase of the original PE image.
727	* If this is 0UL -1 is returned.
728	* @sketch DEBUG: validate state, paSections != NULL
729	* IF ulRVA is 0 THEN return -1
730	* LOOP while more section left and ulRVA is not within section
731	* next section
732	* IF section matching ulRVA is found THEN return index ELSE fail.
733	* @status completely implemented.
734	* @author knut st. osmundsen
735	* @remark Should not be called until getSections has returned successfully.
736	* RVA == 0 is ignored.
737	*/
738	LONG Win32Pe2LxImage::getSectionIndexFromRVA(ULONG ulRVA)
739	{
740	LONG i;
741	#ifdef DEBUG
742	if (paSections == NULL)
743	return -1;
744	#endif
745
746	if (ulRVA == 0UL)
747	return -1;
748
749	i = 0;
750	while (i < cSections &&
751	!(paSections[i].ulRVA <= ulRVA && paSections[i].ulRVA + paSections[i].cbVirtual > ulRVA)) /* ALIGN on page too? */
752	i++;
753
754	return i < cSections ? i : -1;
755	}
756
757
758	/**
759	* Gets pointer to an exported procedure by procedure name.
760	* @returns Address of exported procedure. 0UL if not found.
761	* @param name Exported procedure name.
762	* @status completely implemented.
763	* @author Sander van Leeuwen
764	* @remark
765	*/
766	ULONG Win32Pe2LxImage::getApi(char *name)
767	{
768	APIRET rc;
769	ULONG ulApiAddr;
770
771	rc = DosQueryProcAddr(hmod, 0, name, (PFN *)&ulApiAddr);
772	return rc == NO_ERROR ? ulApiAddr : 0;
773	}
774
775
776	/**
777	* Gets pointer to an exported procedure by ordinal.
778	* @returns Pointer to an exported procedure. 0UL if not found.
779	* @param ordinal Export ordinal number.
780	* @status completely implemented.
781	* @author Sander van Leeuwen
782	* @remark FIXME:
783	* This function should be implemented for both Exe and Dll images!
784	* It could be done similar in both peldr image and pe2lx images by
785	* accessing PE structures.
786	*/
787	ULONG Win32Pe2LxImage::getApi(int ordinal)
788	{
789	APIRET rc;
790	ULONG ulApiAddr;
791
792	rc = DosQueryProcAddr(hmod, ordinal, NULL, (PFN *)&ulApiAddr);
793
794	return rc == NO_ERROR ? ulApiAddr : 0;
795	}

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