ldrPE.cpp@ 2409

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1	/* $Id: ldrPE.cpp 1 1970-01-01 00:00:00Z vboxsync $ */
2	/** @file
3	* InnoTek Portable Runtime - Binary Image Loader, Portable Executable (PE).
4	*/
5
6	/*
7	* Copyright (C) 2006 InnoTek Systemberatung GmbH
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License as published by the Free Software Foundation,
13	* in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
14	* distribution. VirtualBox OSE is distributed in the hope that it will
15	* be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* If you received this file as part of a commercial VirtualBox
18	* distribution, then only the terms of your commercial VirtualBox
19	* license agreement apply instead of the previous paragraph.
20	*/
21
22
23	/*******************************************************************************
24	* Header Files *
25	*******************************************************************************/
26	#define LOG_GROUP RTLOGGROUP_LDR
27	#include <iprt/ldr.h>
28	#include <iprt/alloc.h>
29	#include <iprt/assert.h>
30	#include <iprt/log.h>
31	#include <iprt/string.h>
32	#include <iprt/err.h>
33	#include "internal/ldrPE.h"
34	#include "internal/ldr.h"
35
36
37
38	/*******************************************************************************
39	* Defined Constants And Macros *
40	*******************************************************************************/
41	/** Converts rva to a type.
42	* @param pvBits Pointer to base of image bits.
43	* @param rva Relative virtual address.
44	* @param type Type.
45	*/
46	#define PE_RVA2TYPE(pvBits, rva, type) ((type) ((uintptr_t)pvBits + (uintptr_t)(rva)) )
47
48
49	/*******************************************************************************
50	* Structures and Typedefs *
51	*******************************************************************************/
52	/**
53	* The PE loader structure.
54	*/
55	typedef struct RTLDRMODPE
56	{
57	/** Core module structure. */
58	RTLDRMODINTERNAL Core;
59	/** Pointer to the reader instance. */
60	PRTLDRREADER pReader;
61	/** Pointer to internal copy of image bits.
62	* @todo the reader should take care of this. */
63	void *pvBits;
64	/** The offset of the NT headers. */
65	RTFOFF offNtHdrs;
66
67	/** The machine type (IMAGE_FILE_HEADER::Machine). */
68	uint16_t u16Machine;
69	/** The file flags (IMAGE_FILE_HEADER::Characteristics). */
70	uint16_t fFile;
71	/** Number of sections (IMAGE_FILE_HEADER::NumberOfSections). */
72	unsigned cSections;
73	/** Pointer to an array of the section headers related to the file. */
74	PIMAGE_SECTION_HEADER paSections;
75
76	/** The RVA of the entry point (IMAGE_OPTIONAL_HEADER32::AddressOfEntryPoint). */
77	RTUINTPTR uEntryPointRVA;
78	/** The base address of the image at link time (IMAGE_OPTIONAL_HEADER32::ImageBase). */
79	RTUINTPTR uImageBase;
80	/** The size of the loaded image (IMAGE_OPTIONAL_HEADER32::SizeOfImage). */
81	uint32_t cbImage;
82	/** Size of the header (IMAGE_OPTIONAL_HEADER32::SizeOfHeaders). */
83	uint32_t cbHeaders;
84	/** The import data directory entry. */
85	IMAGE_DATA_DIRECTORY ImportDir;
86	/** The base relocation data directory entry. */
87	IMAGE_DATA_DIRECTORY RelocDir;
88	/** The export data directory entry. */
89	IMAGE_DATA_DIRECTORY ExportDir;
90	} RTLDRMODPE, *PRTLDRMODPE;
91
92	/**
93	* PE Loader module operations.
94	*
95	* The PE loader has one operation which is a bit different between 32-bit and 64-bit PE images,
96	* and for historical and performance reasons have been split into separate functions. Thus the
97	* PE loader extends the RTLDROPS structure with this one entry.
98	*/
99	typedef struct RTLDROPSPE
100	{
101	/** The usual ops. */
102	RTLDROPS Core;
103
104	/**
105	* Resolves all imports.
106	*
107	* @returns iprt status code.
108	* @param pModPe Pointer to the PE loader module structure.
109	* @param pvBitsR Where to read raw image bits. (optional)
110	* @param pvBitsW Where to store the imports. The size of this buffer is equal or
111	* larger to the value returned by pfnGetImageSize().
112	* @param pfnGetImport The callback function to use to resolve imports (aka unresolved externals).
113	* @param pvUser User argument to pass to the callback.
114	*/
115	DECLCALLBACKMEMBER(int, pfnResolveImports)(PRTLDRMODPE pModPe, const void pvBitsR, void pvBitsW, PFNRTLDRIMPORT pfnGetImport, void *pvUser);
116
117	/** Dummy entry to make sure we've initialized it all. */
118	RTUINT uDummy;
119	} RTLDROPSPE, *PRTLDROPSPE;
120
121
122	/*******************************************************************************
123	* Internal Functions *
124	*******************************************************************************/
125	static void rtldrPEConvert32BitOptionalHeaderTo64Bit(PIMAGE_OPTIONAL_HEADER64 pOptHdr);
126	static void rtldrPEConvert32BitLoadConfigTo64Bit(PIMAGE_LOAD_CONFIG_DIRECTORY64 pLoadCfg);
127	static int rtldrPEApplyFixups(PRTLDRMODPE pModPe, const void pvBitsR, void pvBitsW, RTUINTPTR BaseAddress, RTUINTPTR OldBaseAddress);
128
129
130	/** @copydoc RTLDROPS::pfnGetImageSize */
131	static DECLCALLBACK(size_t) rtldrPEGetImageSize(PRTLDRMODINTERNAL pMod)
132	{
133	PRTLDRMODPE pModPe = (PRTLDRMODPE)pMod;
134	return pModPe->cbImage;
135	}
136
137
138	/**
139	* Reads the image into memory.
140	*
141	* @returns iprt status code.
142	* @param pModPe The PE module.
143	* @param pvBits Where to store the bits, this buffer is at least pItem->Core.cbImage in size.
144	*/
145	static int rtldrPEGetBitsNoImportsNorFixups(PRTLDRMODPE pModPe, void *pvBits)
146	{
147	/*
148	* Both these checks are related to pfnDone().
149	*/
150	PRTLDRREADER pReader = pModPe->pReader;
151	if (!pReader)
152	{
153	AssertMsgFailed(("You've called done!\n"));
154	return VERR_WRONG_ORDER;
155	}
156	if (!pvBits)
157	return VERR_NO_MEMORY;
158
159	/*
160	* Zero everything (could be done per section).
161	*/
162	memset(pvBits, 0, pModPe->cbImage);
163
164	#ifdef PE_FILE_OFFSET_EQUALS_RVA
165	/*
166	* Read the entire image / file.
167	*/
168	const RTFOFF cbRawImage = pReader->pfnSize(pReader)
169	rc = pReader->pfnRead(pReader, pvBits, RT_MIN(pModPe->cbImage, cbRawImage), 0);
170	if (RT_FAILURE(rc))
171	Log(("rtldrPE: %s: Reading %#x bytes at offset %#x failed, %Rrc!!! (the entire image)\n",
172	pReader->pfnLogName(pReader), RT_MIN(pModPe->cbImage, cbRawImage), 0, rc));
173	#else
174
175	/*
176	* Read the headers.
177	*/
178	int rc = pReader->pfnRead(pReader, pvBits, pModPe->cbHeaders, 0);
179	if (RT_SUCCESS(rc))
180	{
181	/*
182	* Read the sections.
183	*/
184	PIMAGE_SECTION_HEADER pSH = pModPe->paSections;
185	for (unsigned cLeft = pModPe->cSections; cLeft > 0; cLeft--, pSH++)
186	if (pSH->SizeOfRawData && pSH->Misc.VirtualSize)
187	{
188	rc = pReader->pfnRead(pReader, (uint8_t *)pvBits + pSH->VirtualAddress, pSH->SizeOfRawData, pSH->PointerToRawData);
189	if (RT_FAILURE(rc))
190	{
191	Log(("rtldrPE: %s: Reading %#x bytes at offset %#x failed, %Rrc - section #%d '%.*s'!!!\n",
192	pReader->pfnLogName(pReader), pSH->SizeOfRawData, pSH->PointerToRawData, rc,
193	pSH - pModPe->paSections, sizeof(pSH->Name), pSH->Name));
194	break;
195	}
196	}
197	}
198	else
199	Log(("rtldrPE: %s: Reading %#x bytes at offset %#x failed, %Rrc!!!\n",
200	pReader->pfnLogName(pReader), pModPe->cbHeaders, 0, rc));
201	#endif
202	return rc;
203	}
204
205
206	/**
207	* Reads the bits into the internal buffer pointed to by PRTLDRMODPE::pvBits.
208	*
209	* @returns iprt status code.
210	* @param pModPe The PE module.
211	*/
212	static int rtldrPEReadBits(PRTLDRMODPE pModPe)
213	{
214	Assert(!pModPe->pvBits);
215	void *pvBitsW = RTMemAllocZ(pModPe->cbImage);
216	if (!pvBitsW)
217	return VERR_NO_MEMORY;
218	int rc = rtldrPEGetBitsNoImportsNorFixups(pModPe, pvBitsW);
219	if (RT_SUCCESS(rc))
220	pModPe->pvBits = pvBitsW;
221	else
222	RTMemFree(pvBitsW);
223	return rc;
224	}
225
226
227	/** @copydoc RTLDROPS::pfnGetBits */
228	static DECLCALLBACK(int) rtldrPEGetBits(PRTLDRMODINTERNAL pMod, void pvBits, RTUINTPTR BaseAddress, PFNRTLDRIMPORT pfnGetImport, void pvUser)
229	{
230	PRTLDRMODPE pModPe = (PRTLDRMODPE)pMod;
231
232	/*
233	* Read the image.
234	*/
235	int rc = rtldrPEGetBitsNoImportsNorFixups(pModPe, pvBits);
236	if (RT_SUCCESS(rc))
237	{
238	/*
239	* Resolve imports.
240	*/
241	rc = ((PRTLDROPSPE)pMod->pOps)->pfnResolveImports(pModPe, pvBits, pvBits, pfnGetImport, pvUser);
242	if (RT_SUCCESS(rc))
243	{
244	/*
245	* Apply relocations.
246	*/
247	rc = rtldrPEApplyFixups(pModPe, pvBits, pvBits, BaseAddress, pModPe->uImageBase);
248	if (RT_SUCCESS(rc))
249	return rc;
250	AssertMsgFailed(("Failed to apply fixups. rc=%Rrc\n", rc));
251	}
252	else
253	AssertMsgFailed(("Failed to resolve imports. rc=%Rrc\n", rc));
254	}
255	return rc;
256	}
257
258
259	/** @copydoc RTLDROPSPE::pfnResolveImports */
260	static DECLCALLBACK(int) rtldrPEResolveImports32(PRTLDRMODPE pModPe, const void pvBitsR, void pvBitsW, PFNRTLDRIMPORT pfnGetImport, void *pvUser)
261	{
262	/*
263	* Check if there is actually anything to work on.
264	*/
265	if ( !pModPe->ImportDir.VirtualAddress
266	\|\| !pModPe->ImportDir.Size)
267	return 0;
268
269	/*
270	* Walk the IMAGE_IMPORT_DESCRIPTOR table.
271	*/
272	int rc = VINF_SUCCESS;
273	PIMAGE_IMPORT_DESCRIPTOR pImps;
274	for (pImps = PE_RVA2TYPE(pvBitsR, pModPe->ImportDir.VirtualAddress, PIMAGE_IMPORT_DESCRIPTOR);
275	!rc && pImps->Name != 0 && pImps->FirstThunk != 0;
276	pImps++)
277	{
278	const char pszModName = PE_RVA2TYPE(pvBitsR, pImps->Name, const char );
279	PIMAGE_THUNK_DATA32 pFirstThunk; /* update this. */
280	PIMAGE_THUNK_DATA32 pThunk; /* read from this. */
281	Log3(("RTLdrPE: Import descriptor: %s\n", pszModName));
282	Log4(("RTLdrPE: OriginalFirstThunk = %#RX32\n"
283	"RTLdrPE: TimeDateStamp = %#RX32\n"
284	"RTLdrPE: ForwarderChain = %#RX32\n"
285	"RTLdrPE: Name = %#RX32\n"
286	"RTLdrPE: FirstThunk = %#RX32\n",
287	pImps->u.OriginalFirstThunk, pImps->TimeDateStamp,
288	pImps->ForwarderChain, pImps->Name, pImps->FirstThunk));
289
290	/*
291	* Walk the thunks table(s).
292	*/
293	pFirstThunk = PE_RVA2TYPE(pvBitsW, pImps->FirstThunk, PIMAGE_THUNK_DATA32);
294	pThunk = pImps->u.OriginalFirstThunk == 0
295	? PE_RVA2TYPE(pvBitsR, pImps->FirstThunk, PIMAGE_THUNK_DATA32)
296	: PE_RVA2TYPE(pvBitsR, pImps->u.OriginalFirstThunk, PIMAGE_THUNK_DATA32);
297	while (!rc && pThunk->u1.Ordinal != 0)
298	{
299	RTUINTPTR Value = 0;
300	if (pThunk->u1.Ordinal & IMAGE_ORDINAL_FLAG32)
301	{
302	rc = pfnGetImport(&pModPe->Core, pszModName, NULL, IMAGE_ORDINAL32(pThunk->u1.Ordinal), &Value, pvUser);
303	Log4((RT_SUCCESS(rc) ? "RTLdrPE: %RTptr #%u\n" : "RTLdrPE: %08RX32 #%u rc=%Vrc\n",
304	(uint32_t)Value, IMAGE_ORDINAL32(pThunk->u1.Ordinal), rc));
305	}
306	else if ( pThunk->u1.Ordinal > 0
307	&& pThunk->u1.Ordinal < pModPe->cbImage)
308	{
309	rc = pfnGetImport(&pModPe->Core, pszModName, PE_RVA2TYPE(pvBitsR, (char)pThunk->u1.AddressOfData + 2, const char ),
310	~0, &Value, pvUser);
311	Log4((RT_SUCCESS(rc) ? "RTLdrPE: %RTptr %s\n" : "RTLdrPE: %08RX32 %s rc=%Vrc\n",
312	(uint32_t)Value, PE_RVA2TYPE(pvBitsR, (char)pThunk->u1.AddressOfData + 2, const char ), rc));
313	}
314	else
315	{
316	AssertMsgFailed(("bad import data thunk!\n"));
317	rc = VERR_BAD_EXE_FORMAT;
318	}
319	pFirstThunk->u1.Function = Value;
320	if (pFirstThunk->u1.Function != Value)
321	{
322	AssertMsgFailed(("external symbol address to big!\n"));
323	rc = VERR_ADDRESS_CONFLICT; /** @todo get me a better error status code. */
324	}
325	pThunk++;
326	pFirstThunk++;
327	}
328	}
329
330	return rc;
331	}
332
333
334	/** @copydoc RTLDROPSPE::pfnResolveImports */
335	static DECLCALLBACK(int) rtldrPEResolveImports64(PRTLDRMODPE pModPe, const void pvBitsR, void pvBitsW, PFNRTLDRIMPORT pfnGetImport, void *pvUser)
336	{
337	/*
338	* Check if there is actually anything to work on.
339	*/
340	if ( !pModPe->ImportDir.VirtualAddress
341	\|\| !pModPe->ImportDir.Size)
342	return 0;
343
344	/*
345	* Walk the IMAGE_IMPORT_DESCRIPTOR table.
346	*/
347	int rc = VINF_SUCCESS;
348	PIMAGE_IMPORT_DESCRIPTOR pImps;
349	for (pImps = PE_RVA2TYPE(pvBitsR, pModPe->ImportDir.VirtualAddress, PIMAGE_IMPORT_DESCRIPTOR);
350	!rc && pImps->Name != 0 && pImps->FirstThunk != 0;
351	pImps++)
352	{
353	const char * pszModName = PE_RVA2TYPE(pvBitsR, pImps->Name, const char *);
354	PIMAGE_THUNK_DATA64 pFirstThunk; /* update this. */
355	PIMAGE_THUNK_DATA64 pThunk; /* read from this. */
356	Log3(("RTLdrPE: Import descriptor: %s\n", pszModName));
357	Log4(("RTLdrPE: OriginalFirstThunk = %#RX32\n"
358	"RTLdrPE: TimeDateStamp = %#RX32\n"
359	"RTLdrPE: ForwarderChain = %#RX32\n"
360	"RTLdrPE: Name = %#RX32\n"
361	"RTLdrPE: FirstThunk = %#RX32\n",
362	pImps->u.OriginalFirstThunk, pImps->TimeDateStamp,
363	pImps->ForwarderChain, pImps->Name, pImps->FirstThunk));
364
365	/*
366	* Walk the thunks table(s).
367	*/
368	pFirstThunk = PE_RVA2TYPE(pvBitsW, pImps->FirstThunk, PIMAGE_THUNK_DATA64);
369	pThunk = pImps->u.OriginalFirstThunk == 0
370	? PE_RVA2TYPE(pvBitsR, pImps->FirstThunk, PIMAGE_THUNK_DATA64)
371	: PE_RVA2TYPE(pvBitsR, pImps->u.OriginalFirstThunk, PIMAGE_THUNK_DATA64);
372	while (!rc && pThunk->u1.Ordinal != 0)
373	{
374	RTUINTPTR Value = 0;
375	if (pThunk->u1.Ordinal & IMAGE_ORDINAL_FLAG64)
376	{
377	rc = pfnGetImport(&pModPe->Core, pszModName, NULL, (unsigned)IMAGE_ORDINAL64(pThunk->u1.Ordinal), &Value, pvUser);
378	Log4((RT_SUCCESS(rc) ? "RTLdrPE: %016RX64 #%u\n" : "RTLdrPE: %016RX64 #%u rc=%Vrc\n",
379	(uint64_t)Value, (unsigned)IMAGE_ORDINAL64(pThunk->u1.Ordinal), rc));
380	}
381	else if ( pThunk->u1.Ordinal > 0
382	&& pThunk->u1.Ordinal < pModPe->cbImage)
383	{
384	/** @todo add validation of the string pointer! */
385	rc = pfnGetImport(&pModPe->Core, pszModName, PE_RVA2TYPE(pvBitsR, (uintptr_t)pThunk->u1.AddressOfData + 2, const char *),
386	~0, &Value, pvUser);
387	Log4((RT_SUCCESS(rc) ? "RTLdrPE: %016RX64 %s\n" : "RTLdrPE: %016RX64 %s rc=%Vrc\n",
388	(uint64_t)Value, PE_RVA2TYPE(pvBitsR, (uintptr_t)pThunk->u1.AddressOfData + 2, const char *), rc));
389	}
390	else
391	{
392	AssertMsgFailed(("bad import data thunk!\n"));
393	rc = VERR_BAD_EXE_FORMAT;
394	}
395	pFirstThunk->u1.Function = Value;
396	pThunk++;
397	pFirstThunk++;
398	}
399	}
400
401	return rc;
402	}
403
404
405	/**
406	* Applies fixups.
407	*/
408	static int rtldrPEApplyFixups(PRTLDRMODPE pModPe, const void pvBitsR, void pvBitsW, RTUINTPTR BaseAddress, RTUINTPTR OldBaseAddress)
409	{
410	if ( !pModPe->RelocDir.VirtualAddress
411	\|\| !pModPe->RelocDir.Size)
412	return 0;
413
414	/*
415	* Apply delta fixups iterating fixup chunks.
416	*/
417	PIMAGE_BASE_RELOCATION pbr = PE_RVA2TYPE(pvBitsR, pModPe->RelocDir.VirtualAddress, PIMAGE_BASE_RELOCATION);
418	PIMAGE_BASE_RELOCATION pBaseRelocs = pbr;
419	unsigned cbBaseRelocs = pModPe->RelocDir.Size;
420	RTUINTPTR uDelta = BaseAddress - OldBaseAddress;
421	Log2(("RTLdrPE: Fixups: uDelta=%#RTptr BaseAddress=%#RTptr OldBaseAddress=%#RTptr\n", uDelta, BaseAddress, OldBaseAddress));
422	Log4(("RTLdrPE: BASERELOC: VirtualAddres=%RX32 Size=%RX32\n", pModPe->RelocDir.VirtualAddress, pModPe->RelocDir.Size));
423	Assert(sizeof(pbr) == sizeof(uint32_t) 2);
424
425	while ( (uintptr_t)pbr - (uintptr_t)pBaseRelocs + 8 < cbBaseRelocs /* 8= VirtualAddress and SizeOfBlock members */
426	&& pbr->SizeOfBlock >= 8)
427	{
428	uint16_t pwoffFixup = (uint16_t )(pbr + 1);
429	uint32_t cRelocations = (pbr->SizeOfBlock - sizeof(IMAGE_BASE_RELOCATION)) / sizeof(uint16_t);
430	Log3(("RTLdrPE: base relocs for %#010x, size %#06x (%d relocs)\n", pbr->VirtualAddress, pbr->SizeOfBlock, cRelocations));
431
432	/* Some bound checking just to be sure it works... */
433	if ((uintptr_t)pbr - (uintptr_t)pBaseRelocs + pbr->SizeOfBlock > cbBaseRelocs)
434	cRelocations = (((uintptr_t)pBaseRelocs + cbBaseRelocs) - (uintptr_t)pbr - sizeof(IMAGE_BASE_RELOCATION)) / sizeof(uint16_t);
435
436	/*
437	* Loop thru the fixups in this chunk.
438	*/
439	while (cRelocations != 0)
440	{
441	/*
442	* Common fixup
443	*/
444	static const char * const s_apszReloc[16] =
445	{
446	"ABS", "HIGH", "LOW", "HIGHLOW", "HIGHADJ", "MIPS_JMPADDR", "RES6", "RES7",
447	"RES8", "IA64_IMM64", "DIR64", "HIGH3ADJ", "RES12", "RES13", "RES14", "RES15"
448	}; NOREF(s_apszReloc);
449	union
450	{
451	uint16_t *pu16;
452	uint32_t *pu32;
453	uint64_t *pu64;
454	} u;
455	const int offFixup = *pwoffFixup & 0xfff;
456	u.pu32 = PE_RVA2TYPE(pvBitsW, offFixup + pbr->VirtualAddress, uint32_t *);
457	const int fType = *pwoffFixup >> 12;
458	Log4(("RTLdrPE: %08x %s\n", offFixup + pbr->VirtualAddress, s_apszReloc[fType]));
459	switch (fType)
460	{
461	case IMAGE_REL_BASED_HIGHLOW: /* 32-bit, add delta. */
462	*u.pu32 += uDelta;
463	break;
464	case IMAGE_REL_BASED_DIR64: /* 64-bit, add delta. */
465	*u.pu64 += (RTINTPTR)uDelta;
466	break;
467	case IMAGE_REL_BASED_ABSOLUTE: /* Alignment placeholder. */
468	break;
469	/* odd ones */
470	case IMAGE_REL_BASED_LOW: /* 16-bit, add 1st 16-bit part of the delta. */
471	*u.pu16 += (uint16_t)uDelta;
472	break;
473	case IMAGE_REL_BASED_HIGH: /* 16-bit, add 2nd 16-bit part of the delta. */
474	*u.pu16 += (uint16_t)(uDelta >> 16);
475	break;
476	/* never ever seen these next two, and I'm not 100% sure they are correctly implemented here. */
477	case IMAGE_REL_BASED_HIGHADJ:
478	{
479	if (cRelocations <= 1)
480	{
481	AssertMsgFailed(("HIGHADJ missing 2nd record!\n"));
482	return VERR_BAD_EXE_FORMAT;
483	}
484	cRelocations--;
485	pwoffFixup++;
486	int32_t i32 = (uint32_t)(u.pu16 << 16) \| pwoffFixup;
487	i32 += uDelta;
488	i32 += 0x8000; //??
489	*u.pu16 = (uint16_t)(i32 >> 16);
490	break;
491	}
492	case IMAGE_REL_BASED_HIGH3ADJ:
493	{
494	if (cRelocations <= 2)
495	{
496	AssertMsgFailed(("HIGHADJ3 missing 2nd record!\n"));
497	return VERR_BAD_EXE_FORMAT;
498	}
499	cRelocations -= 2;
500	pwoffFixup++;
501	int64_t i64 = ((uint64_t)u.pu16 << 32) \| (uint32_t *)pwoffFixup++;
502	i64 += (int64_t)uDelta << 16; //??
503	i64 += 0x80000000;//??
504	*u.pu16 = (uint16_t)(i64 >> 32);
505	break;
506	}
507	default:
508	AssertMsgFailed(("Unknown fixup type %d offset=%#x\n", fType, offFixup));
509	break;
510	}
511
512	/*
513	* Next offset/type
514	*/
515	pwoffFixup++;
516	cRelocations--;
517	} /* while loop */
518
519	/*
520	* Next Fixup chunk. (i.e. next page)
521	*/
522	pbr = (PIMAGE_BASE_RELOCATION)((uintptr_t)pbr + pbr->SizeOfBlock);
523	} /* while loop */
524
525	return 0;
526	}
527
528
529	/** @copydoc RTLDROPS::pfnRelocate. */
530	static int rtldrPERelocate(PRTLDRMODINTERNAL pMod, void pvBits, RTUINTPTR NewBaseAddress, RTUINTPTR OldBaseAddress, PFNRTLDRIMPORT pfnGetImport, void pvUser)
531	{
532	PRTLDRMODPE pModPe = (PRTLDRMODPE)pMod;
533
534	/*
535	* Do we have to read the image bits?
536	*/
537	if (!pModPe->pvBits)
538	{
539	int rc = rtldrPEReadBits(pModPe);
540	if (RT_FAILURE(rc))
541	return rc;
542	}
543
544	/*
545	* Process imports.
546	*/
547	int rc = ((PRTLDROPSPE)pMod->pOps)->pfnResolveImports(pModPe, pModPe->pvBits, pvBits, pfnGetImport, pvUser);
548	if (RT_SUCCESS(rc))
549	{
550	/*
551	* Apply relocations.
552	*/
553	rc = rtldrPEApplyFixups(pModPe, pModPe->pvBits, pvBits, NewBaseAddress, OldBaseAddress);
554	AssertRC(rc);
555	}
556	return rc;
557	}
558
559
560	/** @copydoc RTLDROPS::pfnGetSymbolEx. */
561	static DECLCALLBACK(int) rtldrPEGetSymbolEx(PRTLDRMODINTERNAL pMod, const void pvBits, RTUINTPTR BaseAddress, const char pszSymbol, RTUINTPTR *pValue)
562	{
563	PRTLDRMODPE pModPe = (PRTLDRMODPE)pMod;
564
565	/*
566	* Check if there is actually anything to work on.
567	*/
568	if ( !pModPe->ExportDir.VirtualAddress
569	\|\| !pModPe->ExportDir.Size)
570	return VERR_SYMBOL_NOT_FOUND;
571
572	/*
573	* No bits supplied? Do we need to read the bits?
574	*/
575	if (!pvBits)
576	{
577	if (!pModPe->pvBits)
578	{
579	int rc = rtldrPEReadBits(pModPe);
580	if (RT_FAILURE(rc))
581	return rc;
582	}
583	pvBits = pModPe->pvBits;
584	}
585
586	PIMAGE_EXPORT_DIRECTORY pExpDir = PE_RVA2TYPE(pvBits, pModPe->ExportDir.VirtualAddress, PIMAGE_EXPORT_DIRECTORY);
587	int iExpOrdinal = 0; /* index into address table. */
588	if ((uintptr_t)pszSymbol <= 0xffff)
589	{
590	/*
591	* Find ordinal export: Simple table lookup.
592	*/
593	unsigned uOrdinal = (uintptr_t)pszSymbol & 0xffff;
594	if ( uOrdinal >= pExpDir->Base + RT_MAX(pExpDir->NumberOfNames, pExpDir->NumberOfFunctions)
595	\|\| uOrdinal < pExpDir->Base)
596	return VERR_SYMBOL_NOT_FOUND;
597	iExpOrdinal = uOrdinal - pExpDir->Base;
598	}
599	else
600	{
601	/*
602	* Find Named Export: Do binary search on the name table.
603	*/
604	uint32_t paRVANames = PE_RVA2TYPE(pvBits, pExpDir->AddressOfNames, uint32_t );
605	uint16_t paOrdinals = PE_RVA2TYPE(pvBits, pExpDir->AddressOfNameOrdinals, uint16_t );
606	int iStart = 1;
607	int iEnd = pExpDir->NumberOfNames;
608
609	for (;;)
610	{
611	/* end of search? */
612	if (iStart > iEnd)
613	{
614	#ifdef RT_STRICT
615	/* do a linear search just to verify the correctness of the above algorithm */
616	for (unsigned i = 0; i < pExpDir->NumberOfNames; i++)
617	{
618	AssertMsg(i == 0 \|\| strcmp(PE_RVA2TYPE(pvBits, paRVANames[i], const char ), PE_RVA2TYPE(pvBits, paRVANames[i - 1], const char )) > 0,
619	("bug in binary export search!!!\n"));
620	AssertMsg(strcmp(PE_RVA2TYPE(pvBits, paRVANames[i], const char *), pszSymbol) != 0,
621	("bug in binary export search!!!\n"));
622	}
623	#endif
624	return VERR_SYMBOL_NOT_FOUND;
625	}
626
627	int i = (iEnd - iStart) / 2 + iStart;
628	const char pszExpName = PE_RVA2TYPE(pvBits, paRVANames[i - 1], const char );
629	int diff = strcmp(pszExpName, pszSymbol);
630	if (diff > 0) /* pszExpName > pszSymbol: search chunck before i */
631	iEnd = i - 1;
632	else if (diff) /* pszExpName < pszSymbol: search chunk after i */
633	iStart = i + 1;
634	else /* pszExpName == pszSymbol */
635	{
636	iExpOrdinal = paOrdinals[i - 1];
637	break;
638	}
639	} /* binary search thru name table */
640	}
641
642	/*
643	* Found export (iExpOrdinal).
644	*/
645	uint32_t * paAddress = PE_RVA2TYPE(pvBits, pExpDir->AddressOfFunctions, uint32_t *);
646	unsigned uRVAExport = paAddress[iExpOrdinal];
647
648	if ( uRVAExport > pModPe->ExportDir.VirtualAddress
649	&& uRVAExport < pModPe->ExportDir.VirtualAddress + pModPe->ExportDir.Size)
650	{
651	/* Resolve forwarder. */
652	AssertMsgFailed(("Forwarders are not supported!\n"));
653	return VERR_SYMBOL_NOT_FOUND;
654	}
655
656	/* Get plain export address */
657	*pValue = PE_RVA2TYPE(BaseAddress, uRVAExport, RTUINTPTR);
658
659	return VINF_SUCCESS;
660	}
661
662
663	/** @copydoc RTLDROPS::pfnEnumSymbols */
664	static DECLCALLBACK(int) rtldrPEEnumSymbols(PRTLDRMODINTERNAL pMod, unsigned fFlags, const void *pvBits, RTUINTPTR BaseAddress,
665	PFNRTLDRENUMSYMS pfnCallback, void *pvUser)
666	{
667	PRTLDRMODPE pModPe = (PRTLDRMODPE)pMod;
668
669	/*
670	* Check if there is actually anything to work on.
671	*/
672	if ( !pModPe->ExportDir.VirtualAddress
673	\|\| !pModPe->ExportDir.Size)
674	return VERR_SYMBOL_NOT_FOUND;
675
676	/*
677	* No bits supplied? Do we need to read the bits?
678	*/
679	if (!pvBits)
680	{
681	if (!pModPe->pvBits)
682	{
683	int rc = rtldrPEReadBits(pModPe);
684	if (RT_FAILURE(rc))
685	return rc;
686	}
687	pvBits = pModPe->pvBits;
688	}
689
690	/*
691	* We enumerates by ordinal, which means using a slow linear search for
692	* getting any name
693	*/
694	PIMAGE_EXPORT_DIRECTORY pExpDir = PE_RVA2TYPE(pvBits, pModPe->ExportDir.VirtualAddress, PIMAGE_EXPORT_DIRECTORY);
695	uint32_t paAddress = PE_RVA2TYPE(pvBits, pExpDir->AddressOfFunctions, uint32_t );
696	uint32_t paRVANames = PE_RVA2TYPE(pvBits, pExpDir->AddressOfNames, uint32_t );
697	uint16_t paOrdinals = PE_RVA2TYPE(pvBits, pExpDir->AddressOfNameOrdinals, uint16_t );
698	uintptr_t uNamePrev = 0;
699	unsigned cOrdinals = RT_MAX(pExpDir->NumberOfNames, pExpDir->NumberOfFunctions);
700	for (unsigned uOrdinal = 0; uOrdinal < cOrdinals; uOrdinal++)
701	{
702	if (paAddress[uOrdinal] /* needed? */)
703	{
704	/*
705	* Look for name.
706	*/
707	const char *pszName = NULL;
708	/* Search from previous + 1 to the end. */
709	unsigned uName = uNamePrev + 1;
710	while (uName < pExpDir->NumberOfNames)
711	{
712	if (paOrdinals[uName] == uOrdinal)
713	{
714	pszName = PE_RVA2TYPE(pvBits, paRVANames[uName], const char *);
715	uNamePrev = uName;
716	break;
717	}
718	uName++;
719	}
720	if (!pszName)
721	{
722	/* Search from start to the previous. */
723	uName = 0;
724	for (uName = 0 ; uName <= uNamePrev; uName++)
725	{
726	if (paOrdinals[uName] == uOrdinal)
727	{
728	pszName = PE_RVA2TYPE(pvBits, paRVANames[uName], const char *);
729	uNamePrev = uName;
730	break;
731	}
732	}
733	}
734
735	/*
736	* Get address.
737	*/
738	uintptr_t uRVAExport = paAddress[uOrdinal];
739	RTUINTPTR Value;
740	if ( uRVAExport - (uintptr_t)pModPe->ExportDir.VirtualAddress
741	< pModPe->ExportDir.Size)
742	{
743	/* Resolve forwarder. */
744	AssertMsgFailed(("Forwarders are not supported!\n"));
745	continue;
746	}
747	else
748	/* Get plain export address */
749	Value = PE_RVA2TYPE(BaseAddress, uRVAExport, RTUINTPTR);
750
751	/*
752	* Call back.
753	*/
754	int rc = pfnCallback(pMod, pszName, uOrdinal + pExpDir->Base, Value, pvUser);
755	if (rc)
756	return rc;
757	}
758	}
759
760	return VINF_SUCCESS;
761	}
762
763
764	/** @copydoc RTLDROPS::pfnDone */
765	static DECLCALLBACK(int) rtldrPEDone(PRTLDRMODINTERNAL pMod)
766	{
767	PRTLDRMODPE pModPe = (PRTLDRMODPE)pMod;
768	if (pModPe->pvBits)
769	{
770	RTMemFree(pModPe->pvBits);
771	pModPe->pvBits = NULL;
772	}
773	if (pModPe->pReader)
774	{
775	int rc = pModPe->pReader->pfnDestroy(pModPe->pReader);
776	AssertRC(rc);
777	pModPe->pReader = NULL;
778	}
779	return VINF_SUCCESS;
780	}
781
782	/** @copydoc RTLDROPS::pfnClose */
783	static DECLCALLBACK(int) rtldrPEClose(PRTLDRMODINTERNAL pMod)
784	{
785	PRTLDRMODPE pModPe = (PRTLDRMODPE)pMod;
786	if (pModPe->paSections)
787	{
788	RTMemFree(pModPe->paSections);
789	pModPe->paSections = NULL;
790	}
791	if (pModPe->pvBits)
792	{
793	RTMemFree(pModPe->pvBits);
794	pModPe->pvBits = NULL;
795	}
796	if (pModPe->pReader)
797	{
798	int rc = pModPe->pReader->pfnDestroy(pModPe->pReader);
799	AssertRC(rc);
800	pModPe->pReader = NULL;
801	}
802	return VINF_SUCCESS;
803	}
804
805
806	/**
807	* Operations for a 32-bit PE module.
808	*/
809	static const RTLDROPSPE s_rtldrPE32Ops =
810	{
811	{
812	"pe32",
813	rtldrPEClose,
814	NULL,
815	rtldrPEDone,
816	rtldrPEEnumSymbols,
817	/* ext */
818	rtldrPEGetImageSize,
819	rtldrPEGetBits,
820	rtldrPERelocate,
821	rtldrPEGetSymbolEx,
822	42
823	},
824	rtldrPEResolveImports32,
825	42
826	};
827
828
829	/**
830	* Operations for a 64-bit PE module.
831	*/
832	static const RTLDROPSPE s_rtldrPE64Ops =
833	{
834	{
835	"pe64",
836	rtldrPEClose,
837	NULL,
838	rtldrPEDone,
839	rtldrPEEnumSymbols,
840	/* ext */
841	rtldrPEGetImageSize,
842	rtldrPEGetBits,
843	rtldrPERelocate,
844	rtldrPEGetSymbolEx,
845	42
846	},
847	rtldrPEResolveImports64,
848	42
849	};
850
851
852	/**
853	* Converts the optional header from 32 bit to 64 bit.
854	* This is a rather simple task, if you start from the right end.
855	*
856	* @param pOptHdr On input this is a PIMAGE_OPTIONAL_HEADER32.
857	* On output this will be a PIMAGE_OPTIONAL_HEADER64.
858	*/
859	static void rtldrPEConvert32BitOptionalHeaderTo64Bit(PIMAGE_OPTIONAL_HEADER64 pOptHdr)
860	{
861	/*
862	* volatile everywhere! Trying to prevent the compiler being a smarta$$ and reorder stuff.
863	*/
864	IMAGE_OPTIONAL_HEADER32 volatile pOptHdr32 = (IMAGE_OPTIONAL_HEADER32 volatile )pOptHdr;
865	IMAGE_OPTIONAL_HEADER64 volatile *pOptHdr64 = pOptHdr;
866
867	/* from LoaderFlags and out the difference is 4 * 32-bits. */
868	Assert(RT_OFFSETOF(IMAGE_OPTIONAL_HEADER32, LoaderFlags) + 16 == RT_OFFSETOF(IMAGE_OPTIONAL_HEADER64, LoaderFlags));
869	Assert( RT_OFFSETOF(IMAGE_OPTIONAL_HEADER32, DataDirectory[IMAGE_NUMBEROF_DIRECTORY_ENTRIES]) + 16
870	== RT_OFFSETOF(IMAGE_OPTIONAL_HEADER64, DataDirectory[IMAGE_NUMBEROF_DIRECTORY_ENTRIES]));
871	uint32_t volatile pu32Dst = (uint32_t )&pOptHdr64->DataDirectory[IMAGE_NUMBEROF_DIRECTORY_ENTRIES] - 1;
872	const uint32_t volatile pu32Src = (uint32_t )&pOptHdr32->DataDirectory[IMAGE_NUMBEROF_DIRECTORY_ENTRIES] - 1;
873	const uint32_t volatile pu32SrcLast = (uint32_t )&pOptHdr32->LoaderFlags;
874	while (pu32Src >= pu32SrcLast)
875	pu32Dst-- = pu32Src--;
876
877	/* the previous 4 fields are 32/64 and needs special attention. */
878	pOptHdr64->SizeOfHeapCommit = pOptHdr32->SizeOfHeapCommit;
879	pOptHdr64->SizeOfHeapReserve = pOptHdr32->SizeOfHeapReserve;
880	pOptHdr64->SizeOfStackCommit = pOptHdr32->SizeOfStackCommit;
881	uint32_t u32SizeOfStackReserve = pOptHdr32->SizeOfStackReserve;
882	pOptHdr64->SizeOfStackReserve = u32SizeOfStackReserve;
883
884	/* The rest matches except for BaseOfData which has been merged into ImageBase in the 64-bit version..
885	* Thus, ImageBase needs some special treatement. It will probably work fine assigning one to the
886	* other since this is all declared volatile, but taking now chances, we'll use a temp variable.
887	*/
888	Assert(RT_OFFSETOF(IMAGE_OPTIONAL_HEADER32, SizeOfStackReserve) == RT_OFFSETOF(IMAGE_OPTIONAL_HEADER64, SizeOfStackReserve));
889	Assert(RT_OFFSETOF(IMAGE_OPTIONAL_HEADER32, BaseOfData) == RT_OFFSETOF(IMAGE_OPTIONAL_HEADER64, ImageBase));
890	Assert(RT_OFFSETOF(IMAGE_OPTIONAL_HEADER32, SectionAlignment) == RT_OFFSETOF(IMAGE_OPTIONAL_HEADER64, SectionAlignment));
891	uint32_t u32ImageBase = pOptHdr32->ImageBase;
892	pOptHdr64->ImageBase = u32ImageBase;
893	}
894
895
896	/**
897	* Converts the load config directory from 32 bit to 64 bit.
898	* This is a rather simple task, if you start from the right end.
899	*
900	* @param pLoadCfg On input this is a PIMAGE_LOAD_CONFIG_DIRECTORY32.
901	* On output this will be a PIMAGE_LOAD_CONFIG_DIRECTORY64.
902	*/
903	static void rtldrPEConvert32BitLoadConfigTo64Bit(PIMAGE_LOAD_CONFIG_DIRECTORY64 pLoadCfg)
904	{
905	/*
906	* volatile everywhere! Trying to prevent the compiler being a smarta$$ and reorder stuff.
907	*/
908	IMAGE_LOAD_CONFIG_DIRECTORY32 volatile pLoadCfg32 = (IMAGE_LOAD_CONFIG_DIRECTORY32 volatile )pLoadCfg;
909	IMAGE_LOAD_CONFIG_DIRECTORY64 volatile *pLoadCfg64 = pLoadCfg;
910
911	pLoadCfg64->SEHandlerCount = pLoadCfg32->SEHandlerCount;
912	pLoadCfg64->SEHandlerTable = pLoadCfg32->SEHandlerTable;
913	pLoadCfg64->SecurityCookie = pLoadCfg32->SecurityCookie;
914	pLoadCfg64->EditList = pLoadCfg32->EditList;
915	pLoadCfg64->Reserved1 = pLoadCfg32->Reserved1;
916	pLoadCfg64->CSDVersion = pLoadCfg32->CSDVersion;
917	pLoadCfg64->ProcessHeapFlags = pLoadCfg32->ProcessHeapFlags; /* switched place with ProcessAffinityMask, but we're more than 16 byte off by now so it doesn't matter. */
918	pLoadCfg64->ProcessAffinityMask = pLoadCfg32->ProcessAffinityMask;
919	pLoadCfg64->VirtualMemoryThreshold = pLoadCfg32->VirtualMemoryThreshold;
920	pLoadCfg64->MaximumAllocationSize = pLoadCfg32->MaximumAllocationSize;
921	pLoadCfg64->LockPrefixTable = pLoadCfg32->LockPrefixTable;
922	pLoadCfg64->DeCommitTotalFreeThreshold = pLoadCfg32->DeCommitTotalFreeThreshold;
923	uint32_t u32DeCommitFreeBlockThreshold = pLoadCfg32->DeCommitFreeBlockThreshold;
924	pLoadCfg64->DeCommitFreeBlockThreshold = u32DeCommitFreeBlockThreshold;
925	/* the rest is equal. */
926	Assert( RT_OFFSETOF(IMAGE_LOAD_CONFIG_DIRECTORY32, DeCommitFreeBlockThreshold)
927	== RT_OFFSETOF(IMAGE_LOAD_CONFIG_DIRECTORY64, DeCommitFreeBlockThreshold));
928	}
929
930
931	/**
932	* Validates the file header.
933	*
934	* @returns iprt status code.
935	* @param pFileHdr Pointer to the file header that needs validating.
936	* @param pszLogName The log name to prefix the errors with.
937	*/
938	int rtldrPEValidateFileHeader(PIMAGE_FILE_HEADER pFileHdr, const char *pszLogName)
939	{
940	size_t cbOptionalHeader;
941	switch (pFileHdr->Machine)
942	{
943	case IMAGE_FILE_MACHINE_I386:
944	cbOptionalHeader = sizeof(IMAGE_OPTIONAL_HEADER32);
945	break;
946	case IMAGE_FILE_MACHINE_AMD64:
947	cbOptionalHeader = sizeof(IMAGE_OPTIONAL_HEADER64);
948	break;
949
950	default:
951	Log(("rtldrPEOpen: %s: Unsupported Machine=%#x\n",
952	pszLogName, pFileHdr->Machine));
953	return VERR_BAD_EXE_FORMAT;
954	}
955	if (pFileHdr->SizeOfOptionalHeader != cbOptionalHeader)
956	{
957	Log(("rtldrPEOpen: %s: SizeOfOptionalHeader=%#x expected %#x\n",
958	pszLogName, pFileHdr->SizeOfOptionalHeader, cbOptionalHeader));
959	return VERR_BAD_EXE_FORMAT;
960	}
961	/* This restriction needs to be implemented elsewhere. */
962	if (pFileHdr->Characteristics & IMAGE_FILE_RELOCS_STRIPPED)
963	{
964	Log(("rtldrPEOpen: %s: IMAGE_FILE_RELOCS_STRIPPED\n", pszLogName));
965	return VERR_BAD_EXE_FORMAT;
966	}
967	if (pFileHdr->NumberOfSections > 42)
968	{
969	Log(("rtldrPEOpen: %s: NumberOfSections=%d - our limit is 42, please raise it if the binary makes sense.(!!!)\n",
970	pszLogName, pFileHdr->NumberOfSections));
971	return VERR_BAD_EXE_FORMAT;
972	}
973	if (pFileHdr->NumberOfSections < 1)
974	{
975	Log(("rtldrPEOpen: %s: NumberOfSections=%d - we can't have an image without sections (!!!)\n",
976	pszLogName, pFileHdr->NumberOfSections));
977	return VERR_BAD_EXE_FORMAT;
978	}
979	return VINF_SUCCESS;
980	}
981
982
983	/**
984	* Validates the optional header (64/32-bit)
985	*
986	* @returns iprt status code.
987	* @param pOptHdr Pointer to the optional header which needs validation.
988	* @param pszLogName The log name to prefix the errors with.
989	* @param offNtHdrs The offset of the NT headers from teh start of the file.
990	* @param pFileHdr Pointer to the file header (valid).
991	* @param cbRawImage The raw image size.
992	*/
993	static int rtldrPEValidateOptionalHeader(const IMAGE_OPTIONAL_HEADER64 pOptHdr, const char pszLogName, RTFOFF offNtHdrs,
994	const IMAGE_FILE_HEADER *pFileHdr, RTFOFF cbRawImage)
995	{
996	const uint16_t CorrectMagic = pFileHdr->SizeOfOptionalHeader == sizeof(IMAGE_OPTIONAL_HEADER32)
997	? IMAGE_NT_OPTIONAL_HDR32_MAGIC : IMAGE_NT_OPTIONAL_HDR64_MAGIC;
998	if (pOptHdr->Magic != CorrectMagic)
999	{
1000	Log(("rtldrPEOpen: %s: Magic=%#x - expected %#x!!!\n", pszLogName, pOptHdr->Magic, CorrectMagic));
1001	return VERR_BAD_EXE_FORMAT;
1002	}
1003	const uint32_t cbImage = pOptHdr->SizeOfImage;
1004	if (cbImage > _1G)
1005	{
1006	Log(("rtldrPEOpen: %s: SizeOfImage=%#x - Our limit is 1GB (%#x)!!!\n", pszLogName, cbImage, _1G));
1007	return VERR_BAD_EXE_FORMAT;
1008	}
1009	const uint32_t cbMinImageSize = pFileHdr->SizeOfOptionalHeader + sizeof(*pFileHdr) + 4 + (uint32_t)offNtHdrs;
1010	if (cbImage < cbMinImageSize)
1011	{
1012	Log(("rtldrPEOpen: %s: SizeOfImage=%#x to small, minimum %#x!!!\n", pszLogName, cbImage, cbMinImageSize));
1013	return VERR_BAD_EXE_FORMAT;
1014	}
1015	if (pOptHdr->AddressOfEntryPoint >= cbImage)
1016	{
1017	Log(("rtldrPEOpen: %s: AddressOfEntryPoint=%#x - beyond image size (%#x)!!!\n",
1018	pszLogName, pOptHdr->AddressOfEntryPoint, cbImage));
1019	return VERR_BAD_EXE_FORMAT;
1020	}
1021	if (pOptHdr->BaseOfCode >= cbImage)
1022	{
1023	Log(("rtldrPEOpen: %s: BaseOfCode=%#x - beyond image size (%#x)!!!\n",
1024	pszLogName, pOptHdr->BaseOfCode, cbImage));
1025	return VERR_BAD_EXE_FORMAT;
1026	}
1027	#if 0/* only in 32-bit header */
1028	if (pOptHdr->BaseOfData >= cbImage)
1029	{
1030	Log(("rtldrPEOpen: %s: BaseOfData=%#x - beyond image size (%#x)!!!\n",
1031	pszLogName, pOptHdr->BaseOfData, cbImage));
1032	return VERR_BAD_EXE_FORMAT;
1033	}
1034	#endif
1035	if (pOptHdr->SizeOfHeaders >= cbImage)
1036	{
1037	Log(("rtldrPEOpen: %s: SizeOfHeaders=%#x - beyond image size (%#x)!!!\n",
1038	pszLogName, pOptHdr->SizeOfHeaders, cbImage));
1039	return VERR_BAD_EXE_FORMAT;
1040	}
1041	/* don't know how to do the checksum, so ignore it. */
1042	if (pOptHdr->Subsystem == IMAGE_SUBSYSTEM_UNKNOWN)
1043	{
1044	Log(("rtldrPEOpen: %s: Subsystem=%#x (unknown)!!!\n", pszLogName, pOptHdr->Subsystem));
1045	return VERR_BAD_EXE_FORMAT;
1046	}
1047	if (pOptHdr->SizeOfHeaders < cbMinImageSize + pFileHdr->NumberOfSections * sizeof(IMAGE_SECTION_HEADER))
1048	{
1049	Log(("rtldrPEOpen: %s: SizeOfHeaders=%#x - cbMinImageSize %#x + sections %#x = %#llx!!!\n",
1050	pszLogName, pOptHdr->SizeOfHeaders,
1051	cbImage, cbMinImageSize, pFileHdr->NumberOfSections * sizeof(IMAGE_SECTION_HEADER),
1052	cbMinImageSize + pFileHdr->NumberOfSections * sizeof(IMAGE_SECTION_HEADER)));
1053	return VERR_BAD_EXE_FORMAT;
1054	}
1055	if (pOptHdr->SizeOfStackReserve < pOptHdr->SizeOfStackCommit)
1056	{
1057	Log(("rtldrPEOpen: %s: SizeOfStackReserve %#x < SizeOfStackCommit %#x!!!\n",
1058	pszLogName, pOptHdr->SizeOfStackReserve, pOptHdr->SizeOfStackCommit));
1059	return VERR_BAD_EXE_FORMAT;
1060	}
1061	if (pOptHdr->SizeOfHeapReserve < pOptHdr->SizeOfHeapCommit)
1062	{
1063	Log(("rtldrPEOpen: %s: SizeOfStackReserve %#x < SizeOfStackCommit %#x!!!\n",
1064	pszLogName, pOptHdr->SizeOfStackReserve, pOptHdr->SizeOfStackCommit));
1065	return VERR_BAD_EXE_FORMAT;
1066	}
1067
1068	/* DataDirectory */
1069	if (pOptHdr->NumberOfRvaAndSizes != ELEMENTS(pOptHdr->DataDirectory))
1070	{
1071	Log(("rtldrPEOpen: %s: NumberOfRvaAndSizes=%d!!!\n", pszLogName, pOptHdr->NumberOfRvaAndSizes));
1072	return VERR_BAD_EXE_FORMAT;
1073	}
1074	for (unsigned i = 0; i < ELEMENTS(pOptHdr->DataDirectory); i++)
1075	{
1076	IMAGE_DATA_DIRECTORY const *pDir = &pOptHdr->DataDirectory[i];
1077	if (!pDir->Size)
1078	continue;
1079	size_t cb = cbImage;
1080	switch (i)
1081	{
1082	case IMAGE_DIRECTORY_ENTRY_EXPORT: // 0
1083	case IMAGE_DIRECTORY_ENTRY_IMPORT: // 1
1084	case IMAGE_DIRECTORY_ENTRY_RESOURCE: // 2
1085	case IMAGE_DIRECTORY_ENTRY_EXCEPTION: // 3
1086	case IMAGE_DIRECTORY_ENTRY_BASERELOC: // 5
1087	case IMAGE_DIRECTORY_ENTRY_DEBUG: // 6
1088	case IMAGE_DIRECTORY_ENTRY_COPYRIGHT: // 7
1089	case IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT: // 11
1090	case IMAGE_DIRECTORY_ENTRY_IAT: // 12 /* Import Address Table */
1091	break;
1092	case IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG: // 10 - need to check for lock prefixes.
1093	/* Delay inspection after section table is validated. */
1094	break;
1095
1096	case IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT: // 13
1097	Log(("rtldrPEOpen: %s: dir no. %d (DELAY_IMPORT) VirtualAddress=%#x Size=%#x is not supported!!!\n",
1098	pszLogName, i, pDir->VirtualAddress, pDir->Size));
1099	return VERR_LDRPE_DELAY_IMPORT;
1100
1101	/* The security directory seems to be some kind of hack, and the rva is a fileoffset or something. */
1102	case IMAGE_DIRECTORY_ENTRY_SECURITY: // 4
1103	cb = (size_t)cbRawImage; Assert((RTFOFF)cb == cbRawImage);
1104	Log(("rtldrPEOpen: %s: dir no. %d (SECURITY) VirtualAddress=%#x Size=%#x is not supported!!!\n",
1105	pszLogName, i, pDir->VirtualAddress, pDir->Size));
1106	return VERR_LDRPE_SECURITY;
1107
1108	case IMAGE_DIRECTORY_ENTRY_GLOBALPTR: // 8 /* (MIPS GP) */
1109	Log(("rtldrPEOpen: %s: dir no. %d (GLOBALPTR) VirtualAddress=%#x Size=%#x is not supported!!!\n",
1110	pszLogName, i, pDir->VirtualAddress, pDir->Size));
1111	return VERR_LDRPE_GLOBALPTR;
1112
1113	case IMAGE_DIRECTORY_ENTRY_TLS: // 9
1114	Log(("rtldrPEOpen: %s: dir no. %d (TLS) VirtualAddress=%#x Size=%#x is not supported!!!\n",
1115	pszLogName, i, pDir->VirtualAddress, pDir->Size));
1116	return VERR_LDRPE_TLS;
1117
1118	case IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR: // 14
1119	Log(("rtldrPEOpen: %s: dir no. %d (COM_DESCRIPTOR) VirtualAddress=%#x Size=%#x is not supported!!!\n",
1120	pszLogName, i, pDir->VirtualAddress, pDir->Size));
1121	return VERR_LDRPE_COM_DESCRIPTOR;
1122
1123	default:
1124	Log(("rtldrPEOpen: %s: dir no. %d VirtualAddress=%#x Size=%#x is not supported!!!\n",
1125	pszLogName, i, pDir->VirtualAddress, pDir->Size));
1126	return VERR_BAD_EXE_FORMAT;
1127	}
1128	if (pDir->VirtualAddress >= cb)
1129	{
1130	Log(("rtldrPEOpen: %s: dir no. %d VirtualAddress=%#x is invalid (limit %#x)!!!\n",
1131	pszLogName, i, pDir->VirtualAddress, cb));
1132	return VERR_BAD_EXE_FORMAT;
1133	}
1134	if (pDir->Size > cb - pDir->VirtualAddress)
1135	{
1136	Log(("rtldrPEOpen: %s: dir no. %d Size=%#x is invalid (rva=%#x, limit=%#x)!!!\n",
1137	pszLogName, i, pDir->Size, pDir->VirtualAddress, cb));
1138	return VERR_BAD_EXE_FORMAT;
1139	}
1140	}
1141	return VINF_SUCCESS;
1142	}
1143
1144
1145	/**
1146	* Validates the section headers.
1147	*
1148	* @returns iprt status code.
1149	* @param paSections Pointer to the array of sections that is to be validated.
1150	* @param cSections Number of sections in that array.
1151	* @param pszLogName The log name to prefix the errors with.
1152	* @param pOptHdr Pointer to the optional header (valid).
1153	* @param cbRawImage The raw image size.
1154	*/
1155	int rtldrPEValidateSectionHeaders(const IMAGE_SECTION_HEADER paSections, unsigned cSections, const char pszLogName,
1156	const IMAGE_OPTIONAL_HEADER64 *pOptHdr, RTFOFF cbRawImage)
1157	{
1158	const uint32_t cbImage = pOptHdr->SizeOfImage;
1159	const IMAGE_SECTION_HEADER *pSH = &paSections[0];
1160	uint32_t uRvaPrev = pOptHdr->SizeOfHeaders;
1161	Log3(("RTLdrPE: Section Headers:\n"));
1162	for (unsigned cSHdrsLeft = cSections; cSHdrsLeft > 0; cSHdrsLeft--, pSH++)
1163	{
1164	const unsigned iSH = pSH - &paSections[0]; NOREF(iSH);
1165	Log3(("RTLdrPE: #%d '%-8.8s' Characteristics: %08RX32\n"
1166	"RTLdrPE: VirtAddr: %08RX32 VirtSize: %08RX32\n"
1167	"RTLdrPE: FileOff: %08RX32 FileSize: %08RX32\n"
1168	"RTLdrPE: RelocOff: %08RX32 #Relocs: %08RX32\n"
1169	"RTLdrPE: LineOff: %08RX32 #Lines: %08RX32\n",
1170	iSH, pSH->Name, pSH->Characteristics,
1171	pSH->VirtualAddress, pSH->Misc.VirtualSize,
1172	pSH->PointerToRawData, pSH->SizeOfRawData,
1173	pSH->PointerToRelocations, pSH->NumberOfRelocations,
1174	pSH->PointerToLinenumbers, pSH->NumberOfLinenumbers));
1175	if (pSH->Characteristics & (IMAGE_SCN_MEM_16BIT \| IMAGE_SCN_MEM_FARDATA \| IMAGE_SCN_MEM_PURGEABLE \| IMAGE_SCN_MEM_PRELOAD))
1176	{
1177	Log(("rtldrPEOpen: %s: Unsupported section flag(s) %#x section #%d '%.*s'!!!\n",
1178	pszLogName, pSH->Characteristics, iSH, sizeof(pSH->Name), pSH->Name));
1179	return VERR_BAD_EXE_FORMAT;
1180	}
1181
1182	if ( pSH->Misc.VirtualSize
1183	&& !(pSH->Characteristics & IMAGE_SCN_TYPE_NOLOAD)) /* binutils uses this for '.stab' even if it's reserved/obsoleted by MS. */
1184	{
1185	if (pSH->VirtualAddress < uRvaPrev)
1186	{
1187	Log(("rtldrPEOpen: %s: Overlaps previous section or sections aren't in ascending order, VirtualAddress=%#x uRvaPrev=%#x - section #%d '%.*s'!!!\n",
1188	pszLogName, pSH->VirtualAddress, uRvaPrev, iSH, sizeof(pSH->Name), pSH->Name));
1189	return VERR_BAD_EXE_FORMAT;
1190	}
1191	if (pSH->VirtualAddress > cbImage)
1192	{
1193	Log(("rtldrPEOpen: %s: VirtualAddress=%#x - beyond image size (%#x) - section #%d '%.*s'!!!\n",
1194	pszLogName, pSH->VirtualAddress, cbImage, iSH, sizeof(pSH->Name), pSH->Name));
1195	return VERR_BAD_EXE_FORMAT;
1196	}
1197
1198	if (pSH->VirtualAddress & (pOptHdr->SectionAlignment - 1)) //ASSUMES power of 2 alignment.
1199	{
1200	Log(("rtldrPEOpen: %s: VirtualAddress=%#x missaligned (%#x) - section #%d '%.*s'!!!\n",
1201	pszLogName, pSH->VirtualAddress, pOptHdr->SectionAlignment, iSH, sizeof(pSH->Name), pSH->Name));
1202	return VERR_BAD_EXE_FORMAT;
1203	}
1204
1205	#ifdef PE_FILE_OFFSET_EQUALS_RVA
1206	/* Our loader code assume rva matches the file offset. */
1207	if ( pSH->SizeOfRawData
1208	&& pSH->PointerToRawData != pSH->VirtualAddress)
1209	{
1210	Log(("rtldrPEOpen: %s: ASSUMPTION FAILED: file offset %#x != RVA %#x - section #%d '%.*s'!!!\n",
1211	pszLogName, pSH->PointerToRawData, pSH->VirtualAddress, iSH, sizeof(pSH->Name), pSH->Name));
1212	return VERR_BAD_EXE_FORMAT;
1213	}
1214	#endif
1215	}
1216
1217	///@todo only if SizeOfRawData > 0 ?
1218	if ( pSH->PointerToRawData > cbRawImage /// @todo pSH->PointerToRawData >= cbRawImage ?
1219	\|\| pSH->SizeOfRawData > cbRawImage
1220	\|\| pSH->PointerToRawData + pSH->SizeOfRawData > cbRawImage)
1221	{
1222	Log(("rtldrPEOpen: %s: PointerToRawData=%#x SizeOfRawData=%#x - beyond end of file (%#x) - section #%d '%.*s'!!!\n",
1223	pszLogName, pSH->PointerToRawData, pSH->SizeOfRawData, cbRawImage,
1224	iSH, sizeof(pSH->Name), pSH->Name));
1225	return VERR_BAD_EXE_FORMAT;
1226	}
1227
1228	if (pSH->PointerToRawData & (pOptHdr->FileAlignment - 1)) //ASSUMES power of 2 alignment.
1229	{
1230	Log(("rtldrPEOpen: %s: PointerToRawData=%#x missaligned (%#x) - section #%d '%.*s'!!!\n",
1231	pszLogName, pSH->PointerToRawData, pOptHdr->FileAlignment, iSH, sizeof(pSH->Name), pSH->Name));
1232	return VERR_BAD_EXE_FORMAT;
1233	}
1234
1235	/* ignore the relocations and linenumbers. */
1236
1237	uRvaPrev = pSH->VirtualAddress + pSH->Misc.VirtualSize;
1238	}
1239
1240	/** @todo r=bird: more sanity checks! */
1241	return VINF_SUCCESS;
1242	}
1243
1244
1245	/**
1246	* Reads image data by RVA using the section headers.
1247	*
1248	* @returns iprt status code.
1249	* @param pModPe The PE module instance.
1250	* @param pvBuf Where to store the bits.
1251	* @param cb Number of bytes to tread.
1252	* @param RVA Where to read from.
1253	*/
1254	static int rtldrPEReadRVA(PRTLDRMODPE pModPe, void *pvBuf, uint32_t cb, uint32_t RVA)
1255	{
1256	const IMAGE_SECTION_HEADER *pSH = pModPe->paSections;
1257	PRTLDRREADER pReader = pModPe->pReader;
1258	uint32_t cbRead;
1259	int rc;
1260
1261	/*
1262	* Is it the headers, i.e. prior to the first section.
1263	*/
1264	if (RVA < pModPe->cbHeaders)
1265	{
1266	cbRead = RT_MIN(pModPe->cbHeaders - RVA, cb);
1267	rc = pReader->pfnRead(pReader, pvBuf, cbRead, RVA);
1268	if ( cbRead == cb
1269	\|\| RT_FAILURE(rc))
1270	return rc;
1271	cb -= cbRead;
1272	RVA += cbRead;
1273	pvBuf = (uint8_t *)pvBuf + cbRead;
1274	}
1275
1276	/* In the zero space between headers and the first section? */
1277	if (RVA < pSH->VirtualAddress)
1278	{
1279	cbRead = RT_MIN(pSH->VirtualAddress - RVA, cb);
1280	memset(pvBuf, 0, cbRead);
1281	if (cbRead == cb)
1282	return VINF_SUCCESS;
1283	cb -= cbRead;
1284	RVA += cbRead;
1285	pvBuf = (uint8_t *)pvBuf + cbRead;
1286	}
1287
1288	/*
1289	* Iterate the sections.
1290	*/
1291	for (unsigned cLeft = pModPe->cSections;
1292	cLeft > 0;
1293	cLeft--, pSH++)
1294	{
1295	uint32_t off = RVA - pSH->VirtualAddress;
1296	if (off < pSH->Misc.VirtualSize)
1297	{
1298	cbRead = RT_MIN(pSH->Misc.VirtualSize - off, cb);
1299	rc = pReader->pfnRead(pReader, pvBuf, cbRead, pSH->PointerToRawData + off);
1300	if ( cbRead == cb
1301	\|\| RT_FAILURE(rc))
1302	return rc;
1303	cb -= cbRead;
1304	RVA += cbRead;
1305	pvBuf = (uint8_t *)pvBuf + cbRead;
1306	}
1307	uint32_t RVANext = cLeft ? pSH[1].VirtualAddress : pModPe->cbImage;
1308	if (RVA < RVANext)
1309	{
1310	cbRead = RT_MIN(RVANext - RVA, cb);
1311	memset(pvBuf, 0, cbRead);
1312	if (cbRead == cb)
1313	return VINF_SUCCESS;
1314	cb -= cbRead;
1315	RVA += cbRead;
1316	pvBuf = (uint8_t *)pvBuf + cbRead;
1317	}
1318	}
1319
1320	AssertFailed();
1321	return VERR_INTERNAL_ERROR;
1322	}
1323
1324
1325	/**
1326	* Validates the data of some selected data directories entries.
1327	*
1328	* This requires a valid section table and thus has to wait
1329	* till after we've read and validated it.
1330	*
1331	* @returns iprt status code.
1332	* @param pModPe The PE module instance.
1333	* @param pOptHdr Pointer to the optional header (valid).
1334	*/
1335	int rtldrPEValidateDirectories(PRTLDRMODPE pModPe, const IMAGE_OPTIONAL_HEADER64 *pOptHdr)
1336	{
1337	const char *pszLogName = pModPe->pReader->pfnLogName(pModPe->pReader); NOREF(pszLogName);
1338	union /* combine stuff we're reading to help reduce stack usage. */
1339	{
1340	IMAGE_LOAD_CONFIG_DIRECTORY64 Cfg64;
1341	} u;
1342
1343	/*
1344	* The load config entry may include lock prefix tables and whatnot which we don't implement.
1345	* It does also include a lot of stuff which we can ignore, so we'll have to inspect the
1346	* actual data before we can make up our mind about it all.
1347	*/
1348	IMAGE_DATA_DIRECTORY Dir = pOptHdr->DataDirectory[IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG];
1349	if (Dir.Size)
1350	{
1351	const size_t cbExpect = pOptHdr->Magic == IMAGE_NT_OPTIONAL_HDR32_MAGIC
1352	? sizeof(IMAGE_LOAD_CONFIG_DIRECTORY32)
1353	: sizeof(IMAGE_LOAD_CONFIG_DIRECTORY64);
1354	if ( Dir.Size != cbExpect
1355	&& ( cbExpect == sizeof(IMAGE_LOAD_CONFIG_DIRECTORY32)
1356	&& Dir.Size != (uint32_t)RT_OFFSETOF(IMAGE_LOAD_CONFIG_DIRECTORY32, SEHandlerTable))
1357	)
1358	{
1359	Log(("rtldrPEOpen: %s: load cfg dir: unexpected dir size of %d bytes, expected %d.\n",
1360	pszLogName, Dir.Size, cbExpect));
1361	return VERR_LDRPE_LOAD_CONFIG_SIZE;
1362	}
1363
1364	/*
1365	* Read and convert to 64-bit.
1366	*/
1367	memset(&u.Cfg64, 0, sizeof(u.Cfg64));
1368	int rc = rtldrPEReadRVA(pModPe, &u.Cfg64, Dir.Size, Dir.VirtualAddress);
1369	if (RT_FAILURE(rc))
1370	return rc;
1371	rtldrPEConvert32BitLoadConfigTo64Bit(&u.Cfg64);
1372
1373	if (u.Cfg64.Size != cbExpect)
1374	{
1375	Log(("rtldrPEOpen: %s: load cfg dir: unexpected header size of %d bytes, expected %d.\n",
1376	pszLogName, u.Cfg64.Size, cbExpect));
1377	return VERR_LDRPE_LOAD_CONFIG_SIZE;
1378	}
1379	if (u.Cfg64.LockPrefixTable)
1380	{
1381	Log(("rtldrPEOpen: %s: load cfg dir: lock prefix table at %RX64. We don't support lock prefix tables!\n",
1382	pszLogName, u.Cfg64.LockPrefixTable));
1383	return VERR_LDRPE_LOCK_PREFIX_TABLE;
1384	}
1385	#if 0/* this seems to be safe to ignore. */
1386	if ( u.Cfg64.SEHandlerTable
1387	\|\| u.Cfg64.SEHandlerCount)
1388	{
1389	Log(("rtldrPEOpen: %s: load cfg dir: SEHandlerTable=%RX64 and SEHandlerCount=%RX64 are unsupported!\n",
1390	pszLogName, u.Cfg64.SEHandlerTable, u.Cfg64.SEHandlerCount));
1391	return VERR_BAD_EXE_FORMAT;
1392	}
1393	#endif
1394	if (u.Cfg64.EditList)
1395	{
1396	Log(("rtldrPEOpen: %s: load cfg dir: EditList=%RX64 is unsupported!\n",
1397	pszLogName, u.Cfg64.EditList));
1398	return VERR_BAD_EXE_FORMAT;
1399	}
1400	}
1401	return VINF_SUCCESS;
1402	}
1403
1404
1405	/**
1406	* Open a PE image.
1407	*
1408	* @returns iprt status code.
1409	* @param pReader The loader reader instance which will provide the raw image bits.
1410	* @param offNtHdrs The offset of the NT headers (where you find "PE\0\0").
1411	* @param phLdrMod Where to store the handle.
1412	*/
1413	int rtldrPEOpen(PRTLDRREADER pReader, RTFOFF offNtHdrs, PRTLDRMOD phLdrMod)
1414	{
1415	/*
1416	* Read and validate the file header.
1417	*/
1418	IMAGE_FILE_HEADER FileHdr;
1419	int rc = pReader->pfnRead(pReader, &FileHdr, sizeof(FileHdr), offNtHdrs + 4);
1420	if (RT_FAILURE(rc))
1421	return rc;
1422	const char *pszLogName = pReader->pfnLogName(pReader);
1423	rc = rtldrPEValidateFileHeader(&FileHdr, pszLogName);
1424	if (RT_FAILURE(rc))
1425	return rc;
1426
1427	/*
1428	* Read and validate the "optional" header. Convert 32->64 if necessary.
1429	*/
1430	IMAGE_OPTIONAL_HEADER64 OptHdr;
1431	rc = pReader->pfnRead(pReader, &OptHdr, FileHdr.SizeOfOptionalHeader, offNtHdrs + 4 + sizeof(IMAGE_FILE_HEADER));
1432	if (RT_FAILURE(rc))
1433	return rc;
1434	if (FileHdr.SizeOfOptionalHeader != sizeof(OptHdr))
1435	rtldrPEConvert32BitOptionalHeaderTo64Bit(&OptHdr);
1436	rc = rtldrPEValidateOptionalHeader(&OptHdr, pszLogName, offNtHdrs, &FileHdr, pReader->pfnSize(pReader));
1437	if (RT_FAILURE(rc))
1438	return rc;
1439
1440	/*
1441	* Read and validate section headers.
1442	*/
1443	const size_t cbSections = sizeof(IMAGE_SECTION_HEADER) * FileHdr.NumberOfSections;
1444	PIMAGE_SECTION_HEADER paSections = (PIMAGE_SECTION_HEADER)RTMemAlloc(cbSections);
1445	if (!paSections)
1446	return VERR_NO_MEMORY;
1447	rc = pReader->pfnRead(pReader, paSections, cbSections, offNtHdrs + 4 + sizeof(IMAGE_FILE_HEADER) + FileHdr.SizeOfOptionalHeader);
1448	if (RT_SUCCESS(rc))
1449	{
1450	rc = rtldrPEValidateSectionHeaders(paSections, FileHdr.NumberOfSections, pszLogName,
1451	&OptHdr, pReader->pfnSize(pReader));
1452	if (RT_SUCCESS(rc))
1453	{
1454	/*
1455	* Allocate and initialize the PE module structure.
1456	*/
1457	PRTLDRMODPE pModPe = (PRTLDRMODPE)RTMemAllocZ(sizeof(*pModPe));
1458	if (pModPe)
1459	{
1460	pModPe->Core.u32Magic = RTLDRMOD_MAGIC;
1461	pModPe->Core.eState = LDR_STATE_OPENED;
1462	if (FileHdr.SizeOfOptionalHeader == sizeof(OptHdr))
1463	pModPe->Core.pOps = &s_rtldrPE64Ops.Core;
1464	else
1465	pModPe->Core.pOps = &s_rtldrPE32Ops.Core;
1466	pModPe->pReader = pReader;
1467	pModPe->pvBits = NULL;
1468	pModPe->offNtHdrs = offNtHdrs;
1469	pModPe->u16Machine = FileHdr.Machine;
1470	pModPe->fFile = FileHdr.Characteristics;
1471	pModPe->cSections = FileHdr.NumberOfSections;
1472	pModPe->paSections = paSections;
1473	pModPe->uEntryPointRVA= OptHdr.AddressOfEntryPoint;
1474	pModPe->uImageBase = (RTUINTPTR)OptHdr.ImageBase;
1475	pModPe->cbImage = OptHdr.SizeOfImage;
1476	pModPe->cbHeaders = OptHdr.SizeOfHeaders;
1477	pModPe->ImportDir = OptHdr.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT];
1478	pModPe->RelocDir = OptHdr.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
1479	pModPe->ExportDir = OptHdr.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT];
1480
1481	/*
1482	* Perform validation of some selected data directories which requires
1483	* inspection of the actual data.
1484	*/
1485	rc = rtldrPEValidateDirectories(pModPe, &OptHdr);
1486	if (RT_SUCCESS(rc))
1487	{
1488	*phLdrMod = &pModPe->Core;
1489	return VINF_SUCCESS;
1490	}
1491	RTMemFree(pModPe);
1492	}
1493	else
1494	rc = VERR_NO_MEMORY;
1495	}
1496	}
1497	RTMemFree(paSections);
1498	return rc;
1499	}
1500
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source: vbox/trunk/src/VBox/Runtime/ldrPE.cpp@ 2409

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