ldrPE.cpp@ 31396

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1	/* $Id: ldrPE.cpp 28800 2010-04-27 08:22:32Z vboxsync $ */
2	/** @file
3	* IPRT - Binary Image Loader, Portable Executable (PE).
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 Oracle Corporation
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 (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* The contents of this file may alternatively be used under the terms
18	* of the Common Development and Distribution License Version 1.0
19	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20	* VirtualBox OSE distribution, in which case the provisions of the
21	* CDDL are applicable instead of those of the GPL.
22	*
23	* You may elect to license modified versions of this file under the
24	* terms and conditions of either the GPL or the CDDL or both.
25	*/
26
27
28	/*******************************************************************************
29	* Header Files *
30	*******************************************************************************/
31	#define LOG_GROUP RTLOGGROUP_LDR
32	#include <iprt/ldr.h>
33	#include "internal/iprt.h"
34
35	#include <iprt/alloc.h>
36	#include <iprt/assert.h>
37	#include <iprt/log.h>
38	#include <iprt/string.h>
39	#include <iprt/err.h>
40	#include "internal/ldrPE.h"
41	#include "internal/ldr.h"
42
43
44	/*******************************************************************************
45	* Defined Constants And Macros *
46	*******************************************************************************/
47	/** Converts rva to a type.
48	* @param pvBits Pointer to base of image bits.
49	* @param rva Relative virtual address.
50	* @param type Type.
51	*/
52	#define PE_RVA2TYPE(pvBits, rva, type) ((type) ((uintptr_t)pvBits + (uintptr_t)(rva)) )
53
54
55	/*******************************************************************************
56	* Structures and Typedefs *
57	*******************************************************************************/
58	/**
59	* The PE loader structure.
60	*/
61	typedef struct RTLDRMODPE
62	{
63	/** Core module structure. */
64	RTLDRMODINTERNAL Core;
65	/** Pointer to the reader instance. */
66	PRTLDRREADER pReader;
67	/** Pointer to internal copy of image bits.
68	* @todo the reader should take care of this. */
69	void *pvBits;
70	/** The offset of the NT headers. */
71	RTFOFF offNtHdrs;
72
73	/** The machine type (IMAGE_FILE_HEADER::Machine). */
74	uint16_t u16Machine;
75	/** The file flags (IMAGE_FILE_HEADER::Characteristics). */
76	uint16_t fFile;
77	/** Number of sections (IMAGE_FILE_HEADER::NumberOfSections). */
78	unsigned cSections;
79	/** Pointer to an array of the section headers related to the file. */
80	PIMAGE_SECTION_HEADER paSections;
81
82	/** The RVA of the entry point (IMAGE_OPTIONAL_HEADER32::AddressOfEntryPoint). */
83	RTUINTPTR uEntryPointRVA;
84	/** The base address of the image at link time (IMAGE_OPTIONAL_HEADER32::ImageBase). */
85	RTUINTPTR uImageBase;
86	/** The size of the loaded image (IMAGE_OPTIONAL_HEADER32::SizeOfImage). */
87	uint32_t cbImage;
88	/** Size of the header (IMAGE_OPTIONAL_HEADER32::SizeOfHeaders). */
89	uint32_t cbHeaders;
90	/** The import data directory entry. */
91	IMAGE_DATA_DIRECTORY ImportDir;
92	/** The base relocation data directory entry. */
93	IMAGE_DATA_DIRECTORY RelocDir;
94	/** The export data directory entry. */
95	IMAGE_DATA_DIRECTORY ExportDir;
96	} RTLDRMODPE, *PRTLDRMODPE;
97
98	/**
99	* PE Loader module operations.
100	*
101	* The PE loader has one operation which is a bit different between 32-bit and 64-bit PE images,
102	* and for historical and performance reasons have been split into separate functions. Thus the
103	* PE loader extends the RTLDROPS structure with this one entry.
104	*/
105	typedef struct RTLDROPSPE
106	{
107	/** The usual ops. */
108	RTLDROPS Core;
109
110	/**
111	* Resolves all imports.
112	*
113	* @returns iprt status code.
114	* @param pModPe Pointer to the PE loader module structure.
115	* @param pvBitsR Where to read raw image bits. (optional)
116	* @param pvBitsW Where to store the imports. The size of this buffer is equal or
117	* larger to the value returned by pfnGetImageSize().
118	* @param pfnGetImport The callback function to use to resolve imports (aka unresolved externals).
119	* @param pvUser User argument to pass to the callback.
120	*/
121	DECLCALLBACKMEMBER(int, pfnResolveImports)(PRTLDRMODPE pModPe, const void pvBitsR, void pvBitsW, PFNRTLDRIMPORT pfnGetImport, void *pvUser);
122
123	/** Dummy entry to make sure we've initialized it all. */
124	RTUINT uDummy;
125	} RTLDROPSPE, *PRTLDROPSPE;
126
127
128	/*******************************************************************************
129	* Internal Functions *
130	*******************************************************************************/
131	static void rtldrPEConvert32BitOptionalHeaderTo64Bit(PIMAGE_OPTIONAL_HEADER64 pOptHdr);
132	static void rtldrPEConvert32BitLoadConfigTo64Bit(PIMAGE_LOAD_CONFIG_DIRECTORY64 pLoadCfg);
133	static int rtldrPEApplyFixups(PRTLDRMODPE pModPe, const void pvBitsR, void pvBitsW, RTUINTPTR BaseAddress, RTUINTPTR OldBaseAddress);
134
135
136	/** @copydoc RTLDROPS::pfnGetImageSize */
137	static DECLCALLBACK(size_t) rtldrPEGetImageSize(PRTLDRMODINTERNAL pMod)
138	{
139	PRTLDRMODPE pModPe = (PRTLDRMODPE)pMod;
140	return pModPe->cbImage;
141	}
142
143
144	/**
145	* Reads the image into memory.
146	*
147	* @returns iprt status code.
148	* @param pModPe The PE module.
149	* @param pvBits Where to store the bits, this buffer is at least pItem->Core.cbImage in size.
150	*/
151	static int rtldrPEGetBitsNoImportsNorFixups(PRTLDRMODPE pModPe, void *pvBits)
152	{
153	/*
154	* Both these checks are related to pfnDone().
155	*/
156	PRTLDRREADER pReader = pModPe->pReader;
157	if (!pReader)
158	{
159	AssertMsgFailed(("You've called done!\n"));
160	return VERR_WRONG_ORDER;
161	}
162	if (!pvBits)
163	return VERR_NO_MEMORY;
164
165	/*
166	* Zero everything (could be done per section).
167	*/
168	memset(pvBits, 0, pModPe->cbImage);
169
170	#ifdef PE_FILE_OFFSET_EQUALS_RVA
171	/*
172	* Read the entire image / file.
173	*/
174	const RTFOFF cbRawImage = pReader->pfnSize(pReader)
175	rc = pReader->pfnRead(pReader, pvBits, RT_MIN(pModPe->cbImage, cbRawImage), 0);
176	if (RT_FAILURE(rc))
177	Log(("rtldrPE: %s: Reading %#x bytes at offset %#x failed, %Rrc!!! (the entire image)\n",
178	pReader->pfnLogName(pReader), RT_MIN(pModPe->cbImage, cbRawImage), 0, rc));
179	#else
180
181	/*
182	* Read the headers.
183	*/
184	int rc = pReader->pfnRead(pReader, pvBits, pModPe->cbHeaders, 0);
185	if (RT_SUCCESS(rc))
186	{
187	/*
188	* Read the sections.
189	*/
190	PIMAGE_SECTION_HEADER pSH = pModPe->paSections;
191	for (unsigned cLeft = pModPe->cSections; cLeft > 0; cLeft--, pSH++)
192	if (pSH->SizeOfRawData && pSH->Misc.VirtualSize)
193	{
194	rc = pReader->pfnRead(pReader, (uint8_t *)pvBits + pSH->VirtualAddress, pSH->SizeOfRawData, pSH->PointerToRawData);
195	if (RT_FAILURE(rc))
196	{
197	Log(("rtldrPE: %s: Reading %#x bytes at offset %#x failed, %Rrc - section #%d '%.*s'!!!\n",
198	pReader->pfnLogName(pReader), pSH->SizeOfRawData, pSH->PointerToRawData, rc,
199	pSH - pModPe->paSections, sizeof(pSH->Name), pSH->Name));
200	break;
201	}
202	}
203	}
204	else
205	Log(("rtldrPE: %s: Reading %#x bytes at offset %#x failed, %Rrc!!!\n",
206	pReader->pfnLogName(pReader), pModPe->cbHeaders, 0, rc));
207	#endif
208	return rc;
209	}
210
211
212	/**
213	* Reads the bits into the internal buffer pointed to by PRTLDRMODPE::pvBits.
214	*
215	* @returns iprt status code.
216	* @param pModPe The PE module.
217	*/
218	static int rtldrPEReadBits(PRTLDRMODPE pModPe)
219	{
220	Assert(!pModPe->pvBits);
221	void *pvBitsW = RTMemAllocZ(pModPe->cbImage);
222	if (!pvBitsW)
223	return VERR_NO_MEMORY;
224	int rc = rtldrPEGetBitsNoImportsNorFixups(pModPe, pvBitsW);
225	if (RT_SUCCESS(rc))
226	pModPe->pvBits = pvBitsW;
227	else
228	RTMemFree(pvBitsW);
229	return rc;
230	}
231
232
233	/** @copydoc RTLDROPS::pfnGetBits */
234	static DECLCALLBACK(int) rtldrPEGetBits(PRTLDRMODINTERNAL pMod, void pvBits, RTUINTPTR BaseAddress, PFNRTLDRIMPORT pfnGetImport, void pvUser)
235	{
236	PRTLDRMODPE pModPe = (PRTLDRMODPE)pMod;
237
238	/*
239	* Read the image.
240	*/
241	int rc = rtldrPEGetBitsNoImportsNorFixups(pModPe, pvBits);
242	if (RT_SUCCESS(rc))
243	{
244	/*
245	* Resolve imports.
246	*/
247	rc = ((PRTLDROPSPE)pMod->pOps)->pfnResolveImports(pModPe, pvBits, pvBits, pfnGetImport, pvUser);
248	if (RT_SUCCESS(rc))
249	{
250	/*
251	* Apply relocations.
252	*/
253	rc = rtldrPEApplyFixups(pModPe, pvBits, pvBits, BaseAddress, pModPe->uImageBase);
254	if (RT_SUCCESS(rc))
255	return rc;
256	AssertMsgFailed(("Failed to apply fixups. rc=%Rrc\n", rc));
257	}
258	else
259	AssertMsgFailed(("Failed to resolve imports. rc=%Rrc\n", rc));
260	}
261	return rc;
262	}
263
264
265	/** @copydoc RTLDROPSPE::pfnResolveImports */
266	static DECLCALLBACK(int) rtldrPEResolveImports32(PRTLDRMODPE pModPe, const void pvBitsR, void pvBitsW, PFNRTLDRIMPORT pfnGetImport, void *pvUser)
267	{
268	/*
269	* Check if there is actually anything to work on.
270	*/
271	if ( !pModPe->ImportDir.VirtualAddress
272	\|\| !pModPe->ImportDir.Size)
273	return 0;
274
275	/*
276	* Walk the IMAGE_IMPORT_DESCRIPTOR table.
277	*/
278	int rc = VINF_SUCCESS;
279	PIMAGE_IMPORT_DESCRIPTOR pImps;
280	for (pImps = PE_RVA2TYPE(pvBitsR, pModPe->ImportDir.VirtualAddress, PIMAGE_IMPORT_DESCRIPTOR);
281	!rc && pImps->Name != 0 && pImps->FirstThunk != 0;
282	pImps++)
283	{
284	const char pszModName = PE_RVA2TYPE(pvBitsR, pImps->Name, const char );
285	PIMAGE_THUNK_DATA32 pFirstThunk; /* update this. */
286	PIMAGE_THUNK_DATA32 pThunk; /* read from this. */
287	Log3(("RTLdrPE: Import descriptor: %s\n", pszModName));
288	Log4(("RTLdrPE: OriginalFirstThunk = %#RX32\n"
289	"RTLdrPE: TimeDateStamp = %#RX32\n"
290	"RTLdrPE: ForwarderChain = %#RX32\n"
291	"RTLdrPE: Name = %#RX32\n"
292	"RTLdrPE: FirstThunk = %#RX32\n",
293	pImps->u.OriginalFirstThunk, pImps->TimeDateStamp,
294	pImps->ForwarderChain, pImps->Name, pImps->FirstThunk));
295
296	/*
297	* Walk the thunks table(s).
298	*/
299	pFirstThunk = PE_RVA2TYPE(pvBitsW, pImps->FirstThunk, PIMAGE_THUNK_DATA32);
300	pThunk = pImps->u.OriginalFirstThunk == 0
301	? PE_RVA2TYPE(pvBitsR, pImps->FirstThunk, PIMAGE_THUNK_DATA32)
302	: PE_RVA2TYPE(pvBitsR, pImps->u.OriginalFirstThunk, PIMAGE_THUNK_DATA32);
303	while (!rc && pThunk->u1.Ordinal != 0)
304	{
305	RTUINTPTR Value = 0;
306	if (pThunk->u1.Ordinal & IMAGE_ORDINAL_FLAG32)
307	{
308	rc = pfnGetImport(&pModPe->Core, pszModName, NULL, IMAGE_ORDINAL32(pThunk->u1.Ordinal), &Value, pvUser);
309	Log4((RT_SUCCESS(rc) ? "RTLdrPE: %RTptr #%u\n" : "RTLdrPE: %08RX32 #%u rc=%Rrc\n",
310	(uint32_t)Value, IMAGE_ORDINAL32(pThunk->u1.Ordinal), rc));
311	}
312	else if ( pThunk->u1.Ordinal > 0
313	&& pThunk->u1.Ordinal < pModPe->cbImage)
314	{
315	rc = pfnGetImport(&pModPe->Core, pszModName, PE_RVA2TYPE(pvBitsR, (char)pThunk->u1.AddressOfData + 2, const char ),
316	~0, &Value, pvUser);
317	Log4((RT_SUCCESS(rc) ? "RTLdrPE: %RTptr %s\n" : "RTLdrPE: %08RX32 %s rc=%Rrc\n",
318	(uint32_t)Value, PE_RVA2TYPE(pvBitsR, (char)pThunk->u1.AddressOfData + 2, const char ), rc));
319	}
320	else
321	{
322	AssertMsgFailed(("bad import data thunk!\n"));
323	rc = VERR_BAD_EXE_FORMAT;
324	}
325	pFirstThunk->u1.Function = Value;
326	if (pFirstThunk->u1.Function != Value)
327	{
328	AssertMsgFailed(("external symbol address to big!\n"));
329	rc = VERR_ADDRESS_CONFLICT; /** @todo get me a better error status code. */
330	}
331	pThunk++;
332	pFirstThunk++;
333	}
334	}
335
336	return rc;
337	}
338
339
340	/** @copydoc RTLDROPSPE::pfnResolveImports */
341	static DECLCALLBACK(int) rtldrPEResolveImports64(PRTLDRMODPE pModPe, const void pvBitsR, void pvBitsW, PFNRTLDRIMPORT pfnGetImport, void *pvUser)
342	{
343	/*
344	* Check if there is actually anything to work on.
345	*/
346	if ( !pModPe->ImportDir.VirtualAddress
347	\|\| !pModPe->ImportDir.Size)
348	return 0;
349
350	/*
351	* Walk the IMAGE_IMPORT_DESCRIPTOR table.
352	*/
353	int rc = VINF_SUCCESS;
354	PIMAGE_IMPORT_DESCRIPTOR pImps;
355	for (pImps = PE_RVA2TYPE(pvBitsR, pModPe->ImportDir.VirtualAddress, PIMAGE_IMPORT_DESCRIPTOR);
356	!rc && pImps->Name != 0 && pImps->FirstThunk != 0;
357	pImps++)
358	{
359	const char * pszModName = PE_RVA2TYPE(pvBitsR, pImps->Name, const char *);
360	PIMAGE_THUNK_DATA64 pFirstThunk; /* update this. */
361	PIMAGE_THUNK_DATA64 pThunk; /* read from this. */
362	Log3(("RTLdrPE: Import descriptor: %s\n", pszModName));
363	Log4(("RTLdrPE: OriginalFirstThunk = %#RX32\n"
364	"RTLdrPE: TimeDateStamp = %#RX32\n"
365	"RTLdrPE: ForwarderChain = %#RX32\n"
366	"RTLdrPE: Name = %#RX32\n"
367	"RTLdrPE: FirstThunk = %#RX32\n",
368	pImps->u.OriginalFirstThunk, pImps->TimeDateStamp,
369	pImps->ForwarderChain, pImps->Name, pImps->FirstThunk));
370
371	/*
372	* Walk the thunks table(s).
373	*/
374	pFirstThunk = PE_RVA2TYPE(pvBitsW, pImps->FirstThunk, PIMAGE_THUNK_DATA64);
375	pThunk = pImps->u.OriginalFirstThunk == 0
376	? PE_RVA2TYPE(pvBitsR, pImps->FirstThunk, PIMAGE_THUNK_DATA64)
377	: PE_RVA2TYPE(pvBitsR, pImps->u.OriginalFirstThunk, PIMAGE_THUNK_DATA64);
378	while (!rc && pThunk->u1.Ordinal != 0)
379	{
380	RTUINTPTR Value = 0;
381	if (pThunk->u1.Ordinal & IMAGE_ORDINAL_FLAG64)
382	{
383	rc = pfnGetImport(&pModPe->Core, pszModName, NULL, (unsigned)IMAGE_ORDINAL64(pThunk->u1.Ordinal), &Value, pvUser);
384	Log4((RT_SUCCESS(rc) ? "RTLdrPE: %016RX64 #%u\n" : "RTLdrPE: %016RX64 #%u rc=%Rrc\n",
385	(uint64_t)Value, (unsigned)IMAGE_ORDINAL64(pThunk->u1.Ordinal), rc));
386	}
387	else if ( pThunk->u1.Ordinal > 0
388	&& pThunk->u1.Ordinal < pModPe->cbImage)
389	{
390	/** @todo add validation of the string pointer! */
391	rc = pfnGetImport(&pModPe->Core, pszModName, PE_RVA2TYPE(pvBitsR, (uintptr_t)pThunk->u1.AddressOfData + 2, const char *),
392	~0, &Value, pvUser);
393	Log4((RT_SUCCESS(rc) ? "RTLdrPE: %016RX64 %s\n" : "RTLdrPE: %016RX64 %s rc=%Rrc\n",
394	(uint64_t)Value, PE_RVA2TYPE(pvBitsR, (uintptr_t)pThunk->u1.AddressOfData + 2, const char *), rc));
395	}
396	else
397	{
398	AssertMsgFailed(("bad import data thunk!\n"));
399	rc = VERR_BAD_EXE_FORMAT;
400	}
401	pFirstThunk->u1.Function = Value;
402	pThunk++;
403	pFirstThunk++;
404	}
405	}
406
407	return rc;
408	}
409
410
411	/**
412	* Applies fixups.
413	*/
414	static int rtldrPEApplyFixups(PRTLDRMODPE pModPe, const void pvBitsR, void pvBitsW, RTUINTPTR BaseAddress, RTUINTPTR OldBaseAddress)
415	{
416	if ( !pModPe->RelocDir.VirtualAddress
417	\|\| !pModPe->RelocDir.Size)
418	return 0;
419
420	/*
421	* Apply delta fixups iterating fixup chunks.
422	*/
423	PIMAGE_BASE_RELOCATION pbr = PE_RVA2TYPE(pvBitsR, pModPe->RelocDir.VirtualAddress, PIMAGE_BASE_RELOCATION);
424	PIMAGE_BASE_RELOCATION pBaseRelocs = pbr;
425	unsigned cbBaseRelocs = pModPe->RelocDir.Size;
426	RTUINTPTR uDelta = BaseAddress - OldBaseAddress;
427	Log2(("RTLdrPE: Fixups: uDelta=%#RTptr BaseAddress=%#RTptr OldBaseAddress=%#RTptr\n", uDelta, BaseAddress, OldBaseAddress));
428	Log4(("RTLdrPE: BASERELOC: VirtualAddres=%RX32 Size=%RX32\n", pModPe->RelocDir.VirtualAddress, pModPe->RelocDir.Size));
429	Assert(sizeof(pbr) == sizeof(uint32_t) 2);
430
431	while ( (uintptr_t)pbr - (uintptr_t)pBaseRelocs + 8 < cbBaseRelocs /* 8= VirtualAddress and SizeOfBlock members */
432	&& pbr->SizeOfBlock >= 8)
433	{
434	uint16_t pwoffFixup = (uint16_t )(pbr + 1);
435	uint32_t cRelocations = (pbr->SizeOfBlock - sizeof(IMAGE_BASE_RELOCATION)) / sizeof(uint16_t);
436	Log3(("RTLdrPE: base relocs for %#010x, size %#06x (%d relocs)\n", pbr->VirtualAddress, pbr->SizeOfBlock, cRelocations));
437
438	/* Some bound checking just to be sure it works... */
439	if ((uintptr_t)pbr - (uintptr_t)pBaseRelocs + pbr->SizeOfBlock > cbBaseRelocs)
440	cRelocations = (((uintptr_t)pBaseRelocs + cbBaseRelocs) - (uintptr_t)pbr - sizeof(IMAGE_BASE_RELOCATION)) / sizeof(uint16_t);
441
442	/*
443	* Loop thru the fixups in this chunk.
444	*/
445	while (cRelocations != 0)
446	{
447	/*
448	* Common fixup
449	*/
450	static const char * const s_apszReloc[16] =
451	{
452	"ABS", "HIGH", "LOW", "HIGHLOW", "HIGHADJ", "MIPS_JMPADDR", "RES6", "RES7",
453	"RES8", "IA64_IMM64", "DIR64", "HIGH3ADJ", "RES12", "RES13", "RES14", "RES15"
454	}; NOREF(s_apszReloc);
455	union
456	{
457	uint16_t *pu16;
458	uint32_t *pu32;
459	uint64_t *pu64;
460	} u;
461	const int offFixup = *pwoffFixup & 0xfff;
462	u.pu32 = PE_RVA2TYPE(pvBitsW, offFixup + pbr->VirtualAddress, uint32_t *);
463	const int fType = *pwoffFixup >> 12;
464	Log4(("RTLdrPE: %08x %s\n", offFixup + pbr->VirtualAddress, s_apszReloc[fType]));
465	switch (fType)
466	{
467	case IMAGE_REL_BASED_HIGHLOW: /* 32-bit, add delta. */
468	*u.pu32 += uDelta;
469	break;
470	case IMAGE_REL_BASED_DIR64: /* 64-bit, add delta. */
471	*u.pu64 += (RTINTPTR)uDelta;
472	break;
473	case IMAGE_REL_BASED_ABSOLUTE: /* Alignment placeholder. */
474	break;
475	/* odd ones */
476	case IMAGE_REL_BASED_LOW: /* 16-bit, add 1st 16-bit part of the delta. */
477	*u.pu16 += (uint16_t)uDelta;
478	break;
479	case IMAGE_REL_BASED_HIGH: /* 16-bit, add 2nd 16-bit part of the delta. */
480	*u.pu16 += (uint16_t)(uDelta >> 16);
481	break;
482	/* never ever seen these next two, and I'm not 100% sure they are correctly implemented here. */
483	case IMAGE_REL_BASED_HIGHADJ:
484	{
485	if (cRelocations <= 1)
486	{
487	AssertMsgFailed(("HIGHADJ missing 2nd record!\n"));
488	return VERR_BAD_EXE_FORMAT;
489	}
490	cRelocations--;
491	pwoffFixup++;
492	int32_t i32 = (uint32_t)(u.pu16 << 16) \| pwoffFixup;
493	i32 += uDelta;
494	i32 += 0x8000; //??
495	*u.pu16 = (uint16_t)(i32 >> 16);
496	break;
497	}
498	case IMAGE_REL_BASED_HIGH3ADJ:
499	{
500	if (cRelocations <= 2)
501	{
502	AssertMsgFailed(("HIGHADJ3 missing 2nd record!\n"));
503	return VERR_BAD_EXE_FORMAT;
504	}
505	cRelocations -= 2;
506	pwoffFixup++;
507	int64_t i64 = ((uint64_t)u.pu16 << 32) \| (uint32_t *)pwoffFixup++;
508	i64 += (int64_t)uDelta << 16; //??
509	i64 += 0x80000000;//??
510	*u.pu16 = (uint16_t)(i64 >> 32);
511	break;
512	}
513	default:
514	AssertMsgFailed(("Unknown fixup type %d offset=%#x\n", fType, offFixup));
515	break;
516	}
517
518	/*
519	* Next offset/type
520	*/
521	pwoffFixup++;
522	cRelocations--;
523	} /* while loop */
524
525	/*
526	* Next Fixup chunk. (i.e. next page)
527	*/
528	pbr = (PIMAGE_BASE_RELOCATION)((uintptr_t)pbr + pbr->SizeOfBlock);
529	} /* while loop */
530
531	return 0;
532	}
533
534
535	/** @copydoc RTLDROPS::pfnRelocate. */
536	static int rtldrPERelocate(PRTLDRMODINTERNAL pMod, void pvBits, RTUINTPTR NewBaseAddress, RTUINTPTR OldBaseAddress, PFNRTLDRIMPORT pfnGetImport, void pvUser)
537	{
538	PRTLDRMODPE pModPe = (PRTLDRMODPE)pMod;
539
540	/*
541	* Do we have to read the image bits?
542	*/
543	if (!pModPe->pvBits)
544	{
545	int rc = rtldrPEReadBits(pModPe);
546	if (RT_FAILURE(rc))
547	return rc;
548	}
549
550	/*
551	* Process imports.
552	*/
553	int rc = ((PRTLDROPSPE)pMod->pOps)->pfnResolveImports(pModPe, pModPe->pvBits, pvBits, pfnGetImport, pvUser);
554	if (RT_SUCCESS(rc))
555	{
556	/*
557	* Apply relocations.
558	*/
559	rc = rtldrPEApplyFixups(pModPe, pModPe->pvBits, pvBits, NewBaseAddress, OldBaseAddress);
560	AssertRC(rc);
561	}
562	return rc;
563	}
564
565
566	/** @copydoc RTLDROPS::pfnGetSymbolEx. */
567	static DECLCALLBACK(int) rtldrPEGetSymbolEx(PRTLDRMODINTERNAL pMod, const void pvBits, RTUINTPTR BaseAddress, const char pszSymbol, RTUINTPTR *pValue)
568	{
569	PRTLDRMODPE pModPe = (PRTLDRMODPE)pMod;
570
571	/*
572	* Check if there is actually anything to work on.
573	*/
574	if ( !pModPe->ExportDir.VirtualAddress
575	\|\| !pModPe->ExportDir.Size)
576	return VERR_SYMBOL_NOT_FOUND;
577
578	/*
579	* No bits supplied? Do we need to read the bits?
580	*/
581	if (!pvBits)
582	{
583	if (!pModPe->pvBits)
584	{
585	int rc = rtldrPEReadBits(pModPe);
586	if (RT_FAILURE(rc))
587	return rc;
588	}
589	pvBits = pModPe->pvBits;
590	}
591
592	PIMAGE_EXPORT_DIRECTORY pExpDir = PE_RVA2TYPE(pvBits, pModPe->ExportDir.VirtualAddress, PIMAGE_EXPORT_DIRECTORY);
593	int iExpOrdinal = 0; /* index into address table. */
594	if ((uintptr_t)pszSymbol <= 0xffff)
595	{
596	/*
597	* Find ordinal export: Simple table lookup.
598	*/
599	unsigned uOrdinal = (uintptr_t)pszSymbol & 0xffff;
600	if ( uOrdinal >= pExpDir->Base + RT_MAX(pExpDir->NumberOfNames, pExpDir->NumberOfFunctions)
601	\|\| uOrdinal < pExpDir->Base)
602	return VERR_SYMBOL_NOT_FOUND;
603	iExpOrdinal = uOrdinal - pExpDir->Base;
604	}
605	else
606	{
607	/*
608	* Find Named Export: Do binary search on the name table.
609	*/
610	uint32_t paRVANames = PE_RVA2TYPE(pvBits, pExpDir->AddressOfNames, uint32_t );
611	uint16_t paOrdinals = PE_RVA2TYPE(pvBits, pExpDir->AddressOfNameOrdinals, uint16_t );
612	int iStart = 1;
613	int iEnd = pExpDir->NumberOfNames;
614
615	for (;;)
616	{
617	/* end of search? */
618	if (iStart > iEnd)
619	{
620	#ifdef RT_STRICT
621	/* do a linear search just to verify the correctness of the above algorithm */
622	for (unsigned i = 0; i < pExpDir->NumberOfNames; i++)
623	{
624	AssertMsg(i == 0 \|\| strcmp(PE_RVA2TYPE(pvBits, paRVANames[i], const char ), PE_RVA2TYPE(pvBits, paRVANames[i - 1], const char )) > 0,
625	("bug in binary export search!!!\n"));
626	AssertMsg(strcmp(PE_RVA2TYPE(pvBits, paRVANames[i], const char *), pszSymbol) != 0,
627	("bug in binary export search!!!\n"));
628	}
629	#endif
630	return VERR_SYMBOL_NOT_FOUND;
631	}
632
633	int i = (iEnd - iStart) / 2 + iStart;
634	const char pszExpName = PE_RVA2TYPE(pvBits, paRVANames[i - 1], const char );
635	int diff = strcmp(pszExpName, pszSymbol);
636	if (diff > 0) /* pszExpName > pszSymbol: search chunck before i */
637	iEnd = i - 1;
638	else if (diff) /* pszExpName < pszSymbol: search chunk after i */
639	iStart = i + 1;
640	else /* pszExpName == pszSymbol */
641	{
642	iExpOrdinal = paOrdinals[i - 1];
643	break;
644	}
645	} /* binary search thru name table */
646	}
647
648	/*
649	* Found export (iExpOrdinal).
650	*/
651	uint32_t * paAddress = PE_RVA2TYPE(pvBits, pExpDir->AddressOfFunctions, uint32_t *);
652	unsigned uRVAExport = paAddress[iExpOrdinal];
653
654	if ( uRVAExport > pModPe->ExportDir.VirtualAddress
655	&& uRVAExport < pModPe->ExportDir.VirtualAddress + pModPe->ExportDir.Size)
656	{
657	/* Resolve forwarder. */
658	AssertMsgFailed(("Forwarders are not supported!\n"));
659	return VERR_SYMBOL_NOT_FOUND;
660	}
661
662	/* Get plain export address */
663	*pValue = PE_RVA2TYPE(BaseAddress, uRVAExport, RTUINTPTR);
664
665	return VINF_SUCCESS;
666	}
667
668
669	/** @copydoc RTLDROPS::pfnEnumSymbols */
670	static DECLCALLBACK(int) rtldrPEEnumSymbols(PRTLDRMODINTERNAL pMod, unsigned fFlags, const void *pvBits, RTUINTPTR BaseAddress,
671	PFNRTLDRENUMSYMS pfnCallback, void *pvUser)
672	{
673	PRTLDRMODPE pModPe = (PRTLDRMODPE)pMod;
674
675	/*
676	* Check if there is actually anything to work on.
677	*/
678	if ( !pModPe->ExportDir.VirtualAddress
679	\|\| !pModPe->ExportDir.Size)
680	return VERR_SYMBOL_NOT_FOUND;
681
682	/*
683	* No bits supplied? Do we need to read the bits?
684	*/
685	if (!pvBits)
686	{
687	if (!pModPe->pvBits)
688	{
689	int rc = rtldrPEReadBits(pModPe);
690	if (RT_FAILURE(rc))
691	return rc;
692	}
693	pvBits = pModPe->pvBits;
694	}
695
696	/*
697	* We enumerates by ordinal, which means using a slow linear search for
698	* getting any name
699	*/
700	PIMAGE_EXPORT_DIRECTORY pExpDir = PE_RVA2TYPE(pvBits, pModPe->ExportDir.VirtualAddress, PIMAGE_EXPORT_DIRECTORY);
701	uint32_t paAddress = PE_RVA2TYPE(pvBits, pExpDir->AddressOfFunctions, uint32_t );
702	uint32_t paRVANames = PE_RVA2TYPE(pvBits, pExpDir->AddressOfNames, uint32_t );
703	uint16_t paOrdinals = PE_RVA2TYPE(pvBits, pExpDir->AddressOfNameOrdinals, uint16_t );
704	uintptr_t uNamePrev = 0;
705	unsigned cOrdinals = RT_MAX(pExpDir->NumberOfNames, pExpDir->NumberOfFunctions);
706	for (unsigned uOrdinal = 0; uOrdinal < cOrdinals; uOrdinal++)
707	{
708	if (paAddress[uOrdinal] /* needed? */)
709	{
710	/*
711	* Look for name.
712	*/
713	const char *pszName = NULL;
714	/* Search from previous + 1 to the end. */
715	unsigned uName = uNamePrev + 1;
716	while (uName < pExpDir->NumberOfNames)
717	{
718	if (paOrdinals[uName] == uOrdinal)
719	{
720	pszName = PE_RVA2TYPE(pvBits, paRVANames[uName], const char *);
721	uNamePrev = uName;
722	break;
723	}
724	uName++;
725	}
726	if (!pszName)
727	{
728	/* Search from start to the previous. */
729	uName = 0;
730	for (uName = 0 ; uName <= uNamePrev; uName++)
731	{
732	if (paOrdinals[uName] == uOrdinal)
733	{
734	pszName = PE_RVA2TYPE(pvBits, paRVANames[uName], const char *);
735	uNamePrev = uName;
736	break;
737	}
738	}
739	}
740
741	/*
742	* Get address.
743	*/
744	uintptr_t uRVAExport = paAddress[uOrdinal];
745	RTUINTPTR Value;
746	if ( uRVAExport - (uintptr_t)pModPe->ExportDir.VirtualAddress
747	< pModPe->ExportDir.Size)
748	{
749	/* Resolve forwarder. */
750	AssertMsgFailed(("Forwarders are not supported!\n"));
751	continue;
752	}
753	else
754	/* Get plain export address */
755	Value = PE_RVA2TYPE(BaseAddress, uRVAExport, RTUINTPTR);
756
757	/*
758	* Call back.
759	*/
760	int rc = pfnCallback(pMod, pszName, uOrdinal + pExpDir->Base, Value, pvUser);
761	if (rc)
762	return rc;
763	}
764	}
765
766	return VINF_SUCCESS;
767	}
768
769
770	/** @copydoc RTLDROPS::pfnDone */
771	static DECLCALLBACK(int) rtldrPEDone(PRTLDRMODINTERNAL pMod)
772	{
773	PRTLDRMODPE pModPe = (PRTLDRMODPE)pMod;
774	if (pModPe->pvBits)
775	{
776	RTMemFree(pModPe->pvBits);
777	pModPe->pvBits = NULL;
778	}
779	if (pModPe->pReader)
780	{
781	int rc = pModPe->pReader->pfnDestroy(pModPe->pReader);
782	AssertRC(rc);
783	pModPe->pReader = NULL;
784	}
785	return VINF_SUCCESS;
786	}
787
788	/** @copydoc RTLDROPS::pfnClose */
789	static DECLCALLBACK(int) rtldrPEClose(PRTLDRMODINTERNAL pMod)
790	{
791	PRTLDRMODPE pModPe = (PRTLDRMODPE)pMod;
792	if (pModPe->paSections)
793	{
794	RTMemFree(pModPe->paSections);
795	pModPe->paSections = NULL;
796	}
797	if (pModPe->pvBits)
798	{
799	RTMemFree(pModPe->pvBits);
800	pModPe->pvBits = NULL;
801	}
802	if (pModPe->pReader)
803	{
804	int rc = pModPe->pReader->pfnDestroy(pModPe->pReader);
805	AssertRC(rc);
806	pModPe->pReader = NULL;
807	}
808	return VINF_SUCCESS;
809	}
810
811
812	/**
813	* Operations for a 32-bit PE module.
814	*/
815	static const RTLDROPSPE s_rtldrPE32Ops =
816	{
817	{
818	"pe32",
819	rtldrPEClose,
820	NULL,
821	rtldrPEDone,
822	rtldrPEEnumSymbols,
823	/* ext */
824	rtldrPEGetImageSize,
825	rtldrPEGetBits,
826	rtldrPERelocate,
827	rtldrPEGetSymbolEx,
828	42
829	},
830	rtldrPEResolveImports32,
831	42
832	};
833
834
835	/**
836	* Operations for a 64-bit PE module.
837	*/
838	static const RTLDROPSPE s_rtldrPE64Ops =
839	{
840	{
841	"pe64",
842	rtldrPEClose,
843	NULL,
844	rtldrPEDone,
845	rtldrPEEnumSymbols,
846	/* ext */
847	rtldrPEGetImageSize,
848	rtldrPEGetBits,
849	rtldrPERelocate,
850	rtldrPEGetSymbolEx,
851	42
852	},
853	rtldrPEResolveImports64,
854	42
855	};
856
857
858	/**
859	* Converts the optional header from 32 bit to 64 bit.
860	* This is a rather simple task, if you start from the right end.
861	*
862	* @param pOptHdr On input this is a PIMAGE_OPTIONAL_HEADER32.
863	* On output this will be a PIMAGE_OPTIONAL_HEADER64.
864	*/
865	static void rtldrPEConvert32BitOptionalHeaderTo64Bit(PIMAGE_OPTIONAL_HEADER64 pOptHdr)
866	{
867	/*
868	* volatile everywhere! Trying to prevent the compiler being a smarta$$ and reorder stuff.
869	*/
870	IMAGE_OPTIONAL_HEADER32 volatile pOptHdr32 = (IMAGE_OPTIONAL_HEADER32 volatile )pOptHdr;
871	IMAGE_OPTIONAL_HEADER64 volatile *pOptHdr64 = pOptHdr;
872
873	/* from LoaderFlags and out the difference is 4 * 32-bits. */
874	Assert(RT_OFFSETOF(IMAGE_OPTIONAL_HEADER32, LoaderFlags) + 16 == RT_OFFSETOF(IMAGE_OPTIONAL_HEADER64, LoaderFlags));
875	Assert( RT_OFFSETOF(IMAGE_OPTIONAL_HEADER32, DataDirectory[IMAGE_NUMBEROF_DIRECTORY_ENTRIES]) + 16
876	== RT_OFFSETOF(IMAGE_OPTIONAL_HEADER64, DataDirectory[IMAGE_NUMBEROF_DIRECTORY_ENTRIES]));
877	uint32_t volatile pu32Dst = (uint32_t )&pOptHdr64->DataDirectory[IMAGE_NUMBEROF_DIRECTORY_ENTRIES] - 1;
878	const uint32_t volatile pu32Src = (uint32_t )&pOptHdr32->DataDirectory[IMAGE_NUMBEROF_DIRECTORY_ENTRIES] - 1;
879	const uint32_t volatile pu32SrcLast = (uint32_t )&pOptHdr32->LoaderFlags;
880	while (pu32Src >= pu32SrcLast)
881	pu32Dst-- = pu32Src--;
882
883	/* the previous 4 fields are 32/64 and needs special attention. */
884	pOptHdr64->SizeOfHeapCommit = pOptHdr32->SizeOfHeapCommit;
885	pOptHdr64->SizeOfHeapReserve = pOptHdr32->SizeOfHeapReserve;
886	pOptHdr64->SizeOfStackCommit = pOptHdr32->SizeOfStackCommit;
887	uint32_t u32SizeOfStackReserve = pOptHdr32->SizeOfStackReserve;
888	pOptHdr64->SizeOfStackReserve = u32SizeOfStackReserve;
889
890	/* The rest matches except for BaseOfData which has been merged into ImageBase in the 64-bit version..
891	* Thus, ImageBase needs some special treatement. It will probably work fine assigning one to the
892	* other since this is all declared volatile, but taking now chances, we'll use a temp variable.
893	*/
894	Assert(RT_OFFSETOF(IMAGE_OPTIONAL_HEADER32, SizeOfStackReserve) == RT_OFFSETOF(IMAGE_OPTIONAL_HEADER64, SizeOfStackReserve));
895	Assert(RT_OFFSETOF(IMAGE_OPTIONAL_HEADER32, BaseOfData) == RT_OFFSETOF(IMAGE_OPTIONAL_HEADER64, ImageBase));
896	Assert(RT_OFFSETOF(IMAGE_OPTIONAL_HEADER32, SectionAlignment) == RT_OFFSETOF(IMAGE_OPTIONAL_HEADER64, SectionAlignment));
897	uint32_t u32ImageBase = pOptHdr32->ImageBase;
898	pOptHdr64->ImageBase = u32ImageBase;
899	}
900
901
902	/**
903	* Converts the load config directory from 32 bit to 64 bit.
904	* This is a rather simple task, if you start from the right end.
905	*
906	* @param pLoadCfg On input this is a PIMAGE_LOAD_CONFIG_DIRECTORY32.
907	* On output this will be a PIMAGE_LOAD_CONFIG_DIRECTORY64.
908	*/
909	static void rtldrPEConvert32BitLoadConfigTo64Bit(PIMAGE_LOAD_CONFIG_DIRECTORY64 pLoadCfg)
910	{
911	/*
912	* volatile everywhere! Trying to prevent the compiler being a smarta$$ and reorder stuff.
913	*/
914	IMAGE_LOAD_CONFIG_DIRECTORY32 volatile pLoadCfg32 = (IMAGE_LOAD_CONFIG_DIRECTORY32 volatile )pLoadCfg;
915	IMAGE_LOAD_CONFIG_DIRECTORY64 volatile *pLoadCfg64 = pLoadCfg;
916
917	pLoadCfg64->SEHandlerCount = pLoadCfg32->SEHandlerCount;
918	pLoadCfg64->SEHandlerTable = pLoadCfg32->SEHandlerTable;
919	pLoadCfg64->SecurityCookie = pLoadCfg32->SecurityCookie;
920	pLoadCfg64->EditList = pLoadCfg32->EditList;
921	pLoadCfg64->Reserved1 = pLoadCfg32->Reserved1;
922	pLoadCfg64->CSDVersion = pLoadCfg32->CSDVersion;
923	pLoadCfg64->ProcessHeapFlags = pLoadCfg32->ProcessHeapFlags; /* switched place with ProcessAffinityMask, but we're more than 16 byte off by now so it doesn't matter. */
924	pLoadCfg64->ProcessAffinityMask = pLoadCfg32->ProcessAffinityMask;
925	pLoadCfg64->VirtualMemoryThreshold = pLoadCfg32->VirtualMemoryThreshold;
926	pLoadCfg64->MaximumAllocationSize = pLoadCfg32->MaximumAllocationSize;
927	pLoadCfg64->LockPrefixTable = pLoadCfg32->LockPrefixTable;
928	pLoadCfg64->DeCommitTotalFreeThreshold = pLoadCfg32->DeCommitTotalFreeThreshold;
929	uint32_t u32DeCommitFreeBlockThreshold = pLoadCfg32->DeCommitFreeBlockThreshold;
930	pLoadCfg64->DeCommitFreeBlockThreshold = u32DeCommitFreeBlockThreshold;
931	/* the rest is equal. */
932	Assert( RT_OFFSETOF(IMAGE_LOAD_CONFIG_DIRECTORY32, DeCommitFreeBlockThreshold)
933	== RT_OFFSETOF(IMAGE_LOAD_CONFIG_DIRECTORY64, DeCommitFreeBlockThreshold));
934	}
935
936
937	/**
938	* Validates the file header.
939	*
940	* @returns iprt status code.
941	* @param pFileHdr Pointer to the file header that needs validating.
942	* @param pszLogName The log name to prefix the errors with.
943	* @param penmArch Where to store the CPU architecture.
944	*/
945	int rtldrPEValidateFileHeader(PIMAGE_FILE_HEADER pFileHdr, const char *pszLogName, PRTLDRARCH penmArch)
946	{
947	size_t cbOptionalHeader;
948	switch (pFileHdr->Machine)
949	{
950	case IMAGE_FILE_MACHINE_I386:
951	cbOptionalHeader = sizeof(IMAGE_OPTIONAL_HEADER32);
952	*penmArch = RTLDRARCH_X86_32;
953	break;
954	case IMAGE_FILE_MACHINE_AMD64:
955	cbOptionalHeader = sizeof(IMAGE_OPTIONAL_HEADER64);
956	*penmArch = RTLDRARCH_AMD64;
957	break;
958
959	default:
960	Log(("rtldrPEOpen: %s: Unsupported Machine=%#x\n",
961	pszLogName, pFileHdr->Machine));
962	*penmArch = RTLDRARCH_INVALID;
963	return VERR_BAD_EXE_FORMAT;
964	}
965	if (pFileHdr->SizeOfOptionalHeader != cbOptionalHeader)
966	{
967	Log(("rtldrPEOpen: %s: SizeOfOptionalHeader=%#x expected %#x\n",
968	pszLogName, pFileHdr->SizeOfOptionalHeader, cbOptionalHeader));
969	return VERR_BAD_EXE_FORMAT;
970	}
971	/* This restriction needs to be implemented elsewhere. */
972	if (pFileHdr->Characteristics & IMAGE_FILE_RELOCS_STRIPPED)
973	{
974	Log(("rtldrPEOpen: %s: IMAGE_FILE_RELOCS_STRIPPED\n", pszLogName));
975	return VERR_BAD_EXE_FORMAT;
976	}
977	if (pFileHdr->NumberOfSections > 42)
978	{
979	Log(("rtldrPEOpen: %s: NumberOfSections=%d - our limit is 42, please raise it if the binary makes sense.(!!!)\n",
980	pszLogName, pFileHdr->NumberOfSections));
981	return VERR_BAD_EXE_FORMAT;
982	}
983	if (pFileHdr->NumberOfSections < 1)
984	{
985	Log(("rtldrPEOpen: %s: NumberOfSections=%d - we can't have an image without sections (!!!)\n",
986	pszLogName, pFileHdr->NumberOfSections));
987	return VERR_BAD_EXE_FORMAT;
988	}
989	return VINF_SUCCESS;
990	}
991
992
993	/**
994	* Validates the optional header (64/32-bit)
995	*
996	* @returns iprt status code.
997	* @param pOptHdr Pointer to the optional header which needs validation.
998	* @param pszLogName The log name to prefix the errors with.
999	* @param offNtHdrs The offset of the NT headers from teh start of the file.
1000	* @param pFileHdr Pointer to the file header (valid).
1001	* @param cbRawImage The raw image size.
1002	*/
1003	static int rtldrPEValidateOptionalHeader(const IMAGE_OPTIONAL_HEADER64 pOptHdr, const char pszLogName, RTFOFF offNtHdrs,
1004	const IMAGE_FILE_HEADER *pFileHdr, RTFOFF cbRawImage)
1005	{
1006	const uint16_t CorrectMagic = pFileHdr->SizeOfOptionalHeader == sizeof(IMAGE_OPTIONAL_HEADER32)
1007	? IMAGE_NT_OPTIONAL_HDR32_MAGIC : IMAGE_NT_OPTIONAL_HDR64_MAGIC;
1008	if (pOptHdr->Magic != CorrectMagic)
1009	{
1010	Log(("rtldrPEOpen: %s: Magic=%#x - expected %#x!!!\n", pszLogName, pOptHdr->Magic, CorrectMagic));
1011	return VERR_BAD_EXE_FORMAT;
1012	}
1013	const uint32_t cbImage = pOptHdr->SizeOfImage;
1014	if (cbImage > _1G)
1015	{
1016	Log(("rtldrPEOpen: %s: SizeOfImage=%#x - Our limit is 1GB (%#x)!!!\n", pszLogName, cbImage, _1G));
1017	return VERR_BAD_EXE_FORMAT;
1018	}
1019	const uint32_t cbMinImageSize = pFileHdr->SizeOfOptionalHeader + sizeof(*pFileHdr) + 4 + (uint32_t)offNtHdrs;
1020	if (cbImage < cbMinImageSize)
1021	{
1022	Log(("rtldrPEOpen: %s: SizeOfImage=%#x to small, minimum %#x!!!\n", pszLogName, cbImage, cbMinImageSize));
1023	return VERR_BAD_EXE_FORMAT;
1024	}
1025	if (pOptHdr->AddressOfEntryPoint >= cbImage)
1026	{
1027	Log(("rtldrPEOpen: %s: AddressOfEntryPoint=%#x - beyond image size (%#x)!!!\n",
1028	pszLogName, pOptHdr->AddressOfEntryPoint, cbImage));
1029	return VERR_BAD_EXE_FORMAT;
1030	}
1031	if (pOptHdr->BaseOfCode >= cbImage)
1032	{
1033	Log(("rtldrPEOpen: %s: BaseOfCode=%#x - beyond image size (%#x)!!!\n",
1034	pszLogName, pOptHdr->BaseOfCode, cbImage));
1035	return VERR_BAD_EXE_FORMAT;
1036	}
1037	#if 0/* only in 32-bit header */
1038	if (pOptHdr->BaseOfData >= cbImage)
1039	{
1040	Log(("rtldrPEOpen: %s: BaseOfData=%#x - beyond image size (%#x)!!!\n",
1041	pszLogName, pOptHdr->BaseOfData, cbImage));
1042	return VERR_BAD_EXE_FORMAT;
1043	}
1044	#endif
1045	if (pOptHdr->SizeOfHeaders >= cbImage)
1046	{
1047	Log(("rtldrPEOpen: %s: SizeOfHeaders=%#x - beyond image size (%#x)!!!\n",
1048	pszLogName, pOptHdr->SizeOfHeaders, cbImage));
1049	return VERR_BAD_EXE_FORMAT;
1050	}
1051	/* don't know how to do the checksum, so ignore it. */
1052	if (pOptHdr->Subsystem == IMAGE_SUBSYSTEM_UNKNOWN)
1053	{
1054	Log(("rtldrPEOpen: %s: Subsystem=%#x (unknown)!!!\n", pszLogName, pOptHdr->Subsystem));
1055	return VERR_BAD_EXE_FORMAT;
1056	}
1057	if (pOptHdr->SizeOfHeaders < cbMinImageSize + pFileHdr->NumberOfSections * sizeof(IMAGE_SECTION_HEADER))
1058	{
1059	Log(("rtldrPEOpen: %s: SizeOfHeaders=%#x - cbMinImageSize %#x + sections %#x = %#llx!!!\n",
1060	pszLogName, pOptHdr->SizeOfHeaders,
1061	cbImage, cbMinImageSize, pFileHdr->NumberOfSections * sizeof(IMAGE_SECTION_HEADER),
1062	cbMinImageSize + pFileHdr->NumberOfSections * sizeof(IMAGE_SECTION_HEADER)));
1063	return VERR_BAD_EXE_FORMAT;
1064	}
1065	if (pOptHdr->SizeOfStackReserve < pOptHdr->SizeOfStackCommit)
1066	{
1067	Log(("rtldrPEOpen: %s: SizeOfStackReserve %#x < SizeOfStackCommit %#x!!!\n",
1068	pszLogName, pOptHdr->SizeOfStackReserve, pOptHdr->SizeOfStackCommit));
1069	return VERR_BAD_EXE_FORMAT;
1070	}
1071	if (pOptHdr->SizeOfHeapReserve < pOptHdr->SizeOfHeapCommit)
1072	{
1073	Log(("rtldrPEOpen: %s: SizeOfStackReserve %#x < SizeOfStackCommit %#x!!!\n",
1074	pszLogName, pOptHdr->SizeOfStackReserve, pOptHdr->SizeOfStackCommit));
1075	return VERR_BAD_EXE_FORMAT;
1076	}
1077
1078	/* DataDirectory */
1079	if (pOptHdr->NumberOfRvaAndSizes != RT_ELEMENTS(pOptHdr->DataDirectory))
1080	{
1081	Log(("rtldrPEOpen: %s: NumberOfRvaAndSizes=%d!!!\n", pszLogName, pOptHdr->NumberOfRvaAndSizes));
1082	return VERR_BAD_EXE_FORMAT;
1083	}
1084	for (unsigned i = 0; i < RT_ELEMENTS(pOptHdr->DataDirectory); i++)
1085	{
1086	IMAGE_DATA_DIRECTORY const *pDir = &pOptHdr->DataDirectory[i];
1087	if (!pDir->Size)
1088	continue;
1089	size_t cb = cbImage;
1090	switch (i)
1091	{
1092	case IMAGE_DIRECTORY_ENTRY_EXPORT: // 0
1093	case IMAGE_DIRECTORY_ENTRY_IMPORT: // 1
1094	case IMAGE_DIRECTORY_ENTRY_RESOURCE: // 2
1095	case IMAGE_DIRECTORY_ENTRY_EXCEPTION: // 3
1096	case IMAGE_DIRECTORY_ENTRY_BASERELOC: // 5
1097	case IMAGE_DIRECTORY_ENTRY_DEBUG: // 6
1098	case IMAGE_DIRECTORY_ENTRY_COPYRIGHT: // 7
1099	case IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT: // 11
1100	case IMAGE_DIRECTORY_ENTRY_IAT: // 12 /* Import Address Table */
1101	break;
1102	case IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG: // 10 - need to check for lock prefixes.
1103	/* Delay inspection after section table is validated. */
1104	break;
1105
1106	case IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT: // 13
1107	Log(("rtldrPEOpen: %s: dir no. %d (DELAY_IMPORT) VirtualAddress=%#x Size=%#x is not supported!!!\n",
1108	pszLogName, i, pDir->VirtualAddress, pDir->Size));
1109	return VERR_LDRPE_DELAY_IMPORT;
1110
1111	case IMAGE_DIRECTORY_ENTRY_SECURITY: // 4
1112	/* The VirtualAddress is a PointerToRawData. */
1113	cb = (size_t)cbRawImage; Assert((RTFOFF)cb == cbRawImage);
1114	Log(("rtldrPEOpen: %s: dir no. %d (SECURITY) VirtualAddress=%#x Size=%#x is not supported!!!\n",
1115	pszLogName, i, pDir->VirtualAddress, pDir->Size));
1116	if (pDir->Size < sizeof(WIN_CERTIFICATE))
1117	{
1118	Log(("rtldrPEOpen: %s: Security directory is too small: %#x bytes\n", pszLogName, i, pDir->Size));
1119	return VERR_LDRPE_CERT_MALFORMED;
1120	}
1121	if (pDir->Size >= _1M)
1122	{
1123	Log(("rtldrPEOpen: %s: Security directory is too large: %#x bytes\n", pszLogName, i, pDir->Size));
1124	return VERR_LDRPE_CERT_MALFORMED;
1125	}
1126	if (pDir->VirtualAddress & 7)
1127	{
1128	Log(("rtldrPEOpen: %s: Security directory is misaligned: %#x\n", pszLogName, i, pDir->VirtualAddress));
1129	return VERR_LDRPE_CERT_MALFORMED;
1130	}
1131	break;
1132
1133	case IMAGE_DIRECTORY_ENTRY_GLOBALPTR: // 8 /* (MIPS GP) */
1134	Log(("rtldrPEOpen: %s: dir no. %d (GLOBALPTR) VirtualAddress=%#x Size=%#x is not supported!!!\n",
1135	pszLogName, i, pDir->VirtualAddress, pDir->Size));
1136	return VERR_LDRPE_GLOBALPTR;
1137
1138	case IMAGE_DIRECTORY_ENTRY_TLS: // 9
1139	Log(("rtldrPEOpen: %s: dir no. %d (TLS) VirtualAddress=%#x Size=%#x is not supported!!!\n",
1140	pszLogName, i, pDir->VirtualAddress, pDir->Size));
1141	return VERR_LDRPE_TLS;
1142
1143	case IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR:// 14
1144	Log(("rtldrPEOpen: %s: dir no. %d (COM_DESCRIPTOR) VirtualAddress=%#x Size=%#x is not supported!!!\n",
1145	pszLogName, i, pDir->VirtualAddress, pDir->Size));
1146	return VERR_LDRPE_COM_DESCRIPTOR;
1147
1148	default:
1149	Log(("rtldrPEOpen: %s: dir no. %d VirtualAddress=%#x Size=%#x is not supported!!!\n",
1150	pszLogName, i, pDir->VirtualAddress, pDir->Size));
1151	return VERR_BAD_EXE_FORMAT;
1152	}
1153	if (pDir->VirtualAddress >= cb)
1154	{
1155	Log(("rtldrPEOpen: %s: dir no. %d VirtualAddress=%#x is invalid (limit %#x)!!!\n",
1156	pszLogName, i, pDir->VirtualAddress, cb));
1157	return VERR_BAD_EXE_FORMAT;
1158	}
1159	if (pDir->Size > cb - pDir->VirtualAddress)
1160	{
1161	Log(("rtldrPEOpen: %s: dir no. %d Size=%#x is invalid (rva=%#x, limit=%#x)!!!\n",
1162	pszLogName, i, pDir->Size, pDir->VirtualAddress, cb));
1163	return VERR_BAD_EXE_FORMAT;
1164	}
1165	}
1166	return VINF_SUCCESS;
1167	}
1168
1169
1170	/**
1171	* Validates the section headers.
1172	*
1173	* @returns iprt status code.
1174	* @param paSections Pointer to the array of sections that is to be validated.
1175	* @param cSections Number of sections in that array.
1176	* @param pszLogName The log name to prefix the errors with.
1177	* @param pOptHdr Pointer to the optional header (valid).
1178	* @param cbRawImage The raw image size.
1179	*/
1180	int rtldrPEValidateSectionHeaders(const IMAGE_SECTION_HEADER paSections, unsigned cSections, const char pszLogName,
1181	const IMAGE_OPTIONAL_HEADER64 *pOptHdr, RTFOFF cbRawImage)
1182	{
1183	const uint32_t cbImage = pOptHdr->SizeOfImage;
1184	const IMAGE_SECTION_HEADER *pSH = &paSections[0];
1185	uint32_t uRvaPrev = pOptHdr->SizeOfHeaders;
1186	Log3(("RTLdrPE: Section Headers:\n"));
1187	for (unsigned cSHdrsLeft = cSections; cSHdrsLeft > 0; cSHdrsLeft--, pSH++)
1188	{
1189	const unsigned iSH = pSH - &paSections[0]; NOREF(iSH);
1190	Log3(("RTLdrPE: #%d '%-8.8s' Characteristics: %08RX32\n"
1191	"RTLdrPE: VirtAddr: %08RX32 VirtSize: %08RX32\n"
1192	"RTLdrPE: FileOff: %08RX32 FileSize: %08RX32\n"
1193	"RTLdrPE: RelocOff: %08RX32 #Relocs: %08RX32\n"
1194	"RTLdrPE: LineOff: %08RX32 #Lines: %08RX32\n",
1195	iSH, pSH->Name, pSH->Characteristics,
1196	pSH->VirtualAddress, pSH->Misc.VirtualSize,
1197	pSH->PointerToRawData, pSH->SizeOfRawData,
1198	pSH->PointerToRelocations, pSH->NumberOfRelocations,
1199	pSH->PointerToLinenumbers, pSH->NumberOfLinenumbers));
1200	if (pSH->Characteristics & (IMAGE_SCN_MEM_16BIT \| IMAGE_SCN_MEM_FARDATA \| IMAGE_SCN_MEM_PURGEABLE \| IMAGE_SCN_MEM_PRELOAD))
1201	{
1202	Log(("rtldrPEOpen: %s: Unsupported section flag(s) %#x section #%d '%.*s'!!!\n",
1203	pszLogName, pSH->Characteristics, iSH, sizeof(pSH->Name), pSH->Name));
1204	return VERR_BAD_EXE_FORMAT;
1205	}
1206
1207	if ( pSH->Misc.VirtualSize
1208	&& !(pSH->Characteristics & IMAGE_SCN_TYPE_NOLOAD)) /* binutils uses this for '.stab' even if it's reserved/obsoleted by MS. */
1209	{
1210	if (pSH->VirtualAddress < uRvaPrev)
1211	{
1212	Log(("rtldrPEOpen: %s: Overlaps previous section or sections aren't in ascending order, VirtualAddress=%#x uRvaPrev=%#x - section #%d '%.*s'!!!\n",
1213	pszLogName, pSH->VirtualAddress, uRvaPrev, iSH, sizeof(pSH->Name), pSH->Name));
1214	return VERR_BAD_EXE_FORMAT;
1215	}
1216	if (pSH->VirtualAddress > cbImage)
1217	{
1218	Log(("rtldrPEOpen: %s: VirtualAddress=%#x - beyond image size (%#x) - section #%d '%.*s'!!!\n",
1219	pszLogName, pSH->VirtualAddress, cbImage, iSH, sizeof(pSH->Name), pSH->Name));
1220	return VERR_BAD_EXE_FORMAT;
1221	}
1222
1223	if (pSH->VirtualAddress & (pOptHdr->SectionAlignment - 1)) //ASSUMES power of 2 alignment.
1224	{
1225	Log(("rtldrPEOpen: %s: VirtualAddress=%#x missaligned (%#x) - section #%d '%.*s'!!!\n",
1226	pszLogName, pSH->VirtualAddress, pOptHdr->SectionAlignment, iSH, sizeof(pSH->Name), pSH->Name));
1227	return VERR_BAD_EXE_FORMAT;
1228	}
1229
1230	#ifdef PE_FILE_OFFSET_EQUALS_RVA
1231	/* Our loader code assume rva matches the file offset. */
1232	if ( pSH->SizeOfRawData
1233	&& pSH->PointerToRawData != pSH->VirtualAddress)
1234	{
1235	Log(("rtldrPEOpen: %s: ASSUMPTION FAILED: file offset %#x != RVA %#x - section #%d '%.*s'!!!\n",
1236	pszLogName, pSH->PointerToRawData, pSH->VirtualAddress, iSH, sizeof(pSH->Name), pSH->Name));
1237	return VERR_BAD_EXE_FORMAT;
1238	}
1239	#endif
1240	}
1241
1242	///@todo only if SizeOfRawData > 0 ?
1243	if ( pSH->PointerToRawData > cbRawImage /// @todo pSH->PointerToRawData >= cbRawImage ?
1244	\|\| pSH->SizeOfRawData > cbRawImage
1245	\|\| pSH->PointerToRawData + pSH->SizeOfRawData > cbRawImage)
1246	{
1247	Log(("rtldrPEOpen: %s: PointerToRawData=%#x SizeOfRawData=%#x - beyond end of file (%#x) - section #%d '%.*s'!!!\n",
1248	pszLogName, pSH->PointerToRawData, pSH->SizeOfRawData, cbRawImage,
1249	iSH, sizeof(pSH->Name), pSH->Name));
1250	return VERR_BAD_EXE_FORMAT;
1251	}
1252
1253	if (pSH->PointerToRawData & (pOptHdr->FileAlignment - 1)) //ASSUMES power of 2 alignment.
1254	{
1255	Log(("rtldrPEOpen: %s: PointerToRawData=%#x missaligned (%#x) - section #%d '%.*s'!!!\n",
1256	pszLogName, pSH->PointerToRawData, pOptHdr->FileAlignment, iSH, sizeof(pSH->Name), pSH->Name));
1257	return VERR_BAD_EXE_FORMAT;
1258	}
1259
1260	/* ignore the relocations and linenumbers. */
1261
1262	uRvaPrev = pSH->VirtualAddress + pSH->Misc.VirtualSize;
1263	}
1264
1265	/** @todo r=bird: more sanity checks! */
1266	return VINF_SUCCESS;
1267	}
1268
1269
1270	/**
1271	* Reads image data by RVA using the section headers.
1272	*
1273	* @returns iprt status code.
1274	* @param pModPe The PE module instance.
1275	* @param pvBuf Where to store the bits.
1276	* @param cb Number of bytes to tread.
1277	* @param RVA Where to read from.
1278	*/
1279	static int rtldrPEReadRVA(PRTLDRMODPE pModPe, void *pvBuf, uint32_t cb, uint32_t RVA)
1280	{
1281	const IMAGE_SECTION_HEADER *pSH = pModPe->paSections;
1282	PRTLDRREADER pReader = pModPe->pReader;
1283	uint32_t cbRead;
1284	int rc;
1285
1286	/*
1287	* Is it the headers, i.e. prior to the first section.
1288	*/
1289	if (RVA < pModPe->cbHeaders)
1290	{
1291	cbRead = RT_MIN(pModPe->cbHeaders - RVA, cb);
1292	rc = pReader->pfnRead(pReader, pvBuf, cbRead, RVA);
1293	if ( cbRead == cb
1294	\|\| RT_FAILURE(rc))
1295	return rc;
1296	cb -= cbRead;
1297	RVA += cbRead;
1298	pvBuf = (uint8_t *)pvBuf + cbRead;
1299	}
1300
1301	/* In the zero space between headers and the first section? */
1302	if (RVA < pSH->VirtualAddress)
1303	{
1304	cbRead = RT_MIN(pSH->VirtualAddress - RVA, cb);
1305	memset(pvBuf, 0, cbRead);
1306	if (cbRead == cb)
1307	return VINF_SUCCESS;
1308	cb -= cbRead;
1309	RVA += cbRead;
1310	pvBuf = (uint8_t *)pvBuf + cbRead;
1311	}
1312
1313	/*
1314	* Iterate the sections.
1315	*/
1316	for (unsigned cLeft = pModPe->cSections;
1317	cLeft > 0;
1318	cLeft--, pSH++)
1319	{
1320	uint32_t off = RVA - pSH->VirtualAddress;
1321	if (off < pSH->Misc.VirtualSize)
1322	{
1323	cbRead = RT_MIN(pSH->Misc.VirtualSize - off, cb);
1324	rc = pReader->pfnRead(pReader, pvBuf, cbRead, pSH->PointerToRawData + off);
1325	if ( cbRead == cb
1326	\|\| RT_FAILURE(rc))
1327	return rc;
1328	cb -= cbRead;
1329	RVA += cbRead;
1330	pvBuf = (uint8_t *)pvBuf + cbRead;
1331	}
1332	uint32_t RVANext = cLeft ? pSH[1].VirtualAddress : pModPe->cbImage;
1333	if (RVA < RVANext)
1334	{
1335	cbRead = RT_MIN(RVANext - RVA, cb);
1336	memset(pvBuf, 0, cbRead);
1337	if (cbRead == cb)
1338	return VINF_SUCCESS;
1339	cb -= cbRead;
1340	RVA += cbRead;
1341	pvBuf = (uint8_t *)pvBuf + cbRead;
1342	}
1343	}
1344
1345	AssertFailed();
1346	return VERR_INTERNAL_ERROR;
1347	}
1348
1349
1350	/**
1351	* Validates the data of some selected data directories entries.
1352	*
1353	* This requires a valid section table and thus has to wait
1354	* till after we've read and validated it.
1355	*
1356	* @returns iprt status code.
1357	* @param pModPe The PE module instance.
1358	* @param pOptHdr Pointer to the optional header (valid).
1359	*/
1360	int rtldrPEValidateDirectories(PRTLDRMODPE pModPe, const IMAGE_OPTIONAL_HEADER64 *pOptHdr)
1361	{
1362	const char *pszLogName = pModPe->pReader->pfnLogName(pModPe->pReader); NOREF(pszLogName);
1363	union /* combine stuff we're reading to help reduce stack usage. */
1364	{
1365	IMAGE_LOAD_CONFIG_DIRECTORY64 Cfg64;
1366	} u;
1367
1368	/*
1369	* The load config entry may include lock prefix tables and whatnot which we don't implement.
1370	* It does also include a lot of stuff which we can ignore, so we'll have to inspect the
1371	* actual data before we can make up our mind about it all.
1372	*/
1373	IMAGE_DATA_DIRECTORY Dir = pOptHdr->DataDirectory[IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG];
1374	if (Dir.Size)
1375	{
1376	const size_t cbExpect = pOptHdr->Magic == IMAGE_NT_OPTIONAL_HDR32_MAGIC
1377	? sizeof(IMAGE_LOAD_CONFIG_DIRECTORY32)
1378	: sizeof(IMAGE_LOAD_CONFIG_DIRECTORY64);
1379	if ( Dir.Size != cbExpect
1380	&& ( cbExpect == sizeof(IMAGE_LOAD_CONFIG_DIRECTORY32)
1381	&& Dir.Size != (uint32_t)RT_OFFSETOF(IMAGE_LOAD_CONFIG_DIRECTORY32, SEHandlerTable))
1382	)
1383	{
1384	Log(("rtldrPEOpen: %s: load cfg dir: unexpected dir size of %d bytes, expected %d.\n",
1385	pszLogName, Dir.Size, cbExpect));
1386	return VERR_LDRPE_LOAD_CONFIG_SIZE;
1387	}
1388
1389	/*
1390	* Read and convert to 64-bit.
1391	*/
1392	memset(&u.Cfg64, 0, sizeof(u.Cfg64));
1393	int rc = rtldrPEReadRVA(pModPe, &u.Cfg64, Dir.Size, Dir.VirtualAddress);
1394	if (RT_FAILURE(rc))
1395	return rc;
1396	rtldrPEConvert32BitLoadConfigTo64Bit(&u.Cfg64);
1397
1398	if (u.Cfg64.Size != cbExpect)
1399	{
1400	Log(("rtldrPEOpen: %s: load cfg dir: unexpected header size of %d bytes, expected %d.\n",
1401	pszLogName, u.Cfg64.Size, cbExpect));
1402	return VERR_LDRPE_LOAD_CONFIG_SIZE;
1403	}
1404	if (u.Cfg64.LockPrefixTable)
1405	{
1406	Log(("rtldrPEOpen: %s: load cfg dir: lock prefix table at %RX64. We don't support lock prefix tables!\n",
1407	pszLogName, u.Cfg64.LockPrefixTable));
1408	return VERR_LDRPE_LOCK_PREFIX_TABLE;
1409	}
1410	#if 0/* this seems to be safe to ignore. */
1411	if ( u.Cfg64.SEHandlerTable
1412	\|\| u.Cfg64.SEHandlerCount)
1413	{
1414	Log(("rtldrPEOpen: %s: load cfg dir: SEHandlerTable=%RX64 and SEHandlerCount=%RX64 are unsupported!\n",
1415	pszLogName, u.Cfg64.SEHandlerTable, u.Cfg64.SEHandlerCount));
1416	return VERR_BAD_EXE_FORMAT;
1417	}
1418	#endif
1419	if (u.Cfg64.EditList)
1420	{
1421	Log(("rtldrPEOpen: %s: load cfg dir: EditList=%RX64 is unsupported!\n",
1422	pszLogName, u.Cfg64.EditList));
1423	return VERR_BAD_EXE_FORMAT;
1424	}
1425	}
1426
1427	/*
1428	* If the image is signed, take a look at the signature.
1429	*/
1430	Dir = pOptHdr->DataDirectory[IMAGE_DIRECTORY_ENTRY_SECURITY];
1431	if (Dir.Size)
1432	{
1433	PWIN_CERTIFICATE pFirst = (PWIN_CERTIFICATE)RTMemTmpAlloc(Dir.Size);
1434	if (!pFirst)
1435	return VERR_NO_TMP_MEMORY;
1436	int rc = pModPe->pReader->pfnRead(pModPe->pReader, pFirst, Dir.Size, Dir.VirtualAddress);
1437	if (RT_SUCCESS(rc))
1438	{
1439	uint32_t off = 0;
1440	PWIN_CERTIFICATE pCur = pFirst;
1441	do
1442	{
1443	/* validate the members. */
1444	uint32_t const cbCur = RT_ALIGN_32(pCur->dwLength, 8);
1445	if ( cbCur < sizeof(WIN_CERTIFICATE)
1446	\|\| cbCur + off > RT_ALIGN_32(Dir.Size, 8))
1447	{
1448	Log(("rtldrPEOpen: %s: cert at %#x/%#x: dwLength=%#x\n", pszLogName, off, Dir.Size, pCur->dwLength));
1449	rc = VERR_LDRPE_CERT_MALFORMED;
1450	break;
1451	}
1452	if ( pCur->wRevision != WIN_CERT_REVISION_2_0
1453	&& pCur->wRevision != WIN_CERT_REVISION_1_0)
1454	{
1455	Log(("rtldrPEOpen: %s: cert at %#x/%#x: wRevision=%#x\n", pszLogName, off, Dir.Size, pCur->wRevision));
1456	rc = pCur->wRevision >= WIN_CERT_REVISION_1_0 ? VERR_LDRPE_CERT_UNSUPPORTED : VERR_LDRPE_CERT_MALFORMED;
1457	break;
1458	}
1459	if ( pCur->wCertificateType != WIN_CERT_TYPE_PKCS_SIGNED_DATA
1460	&& pCur->wCertificateType != WIN_CERT_TYPE_X509
1461	/&& pCur->wCertificateType != WIN_CERT_TYPE_RESERVED_1/
1462	/&& pCur->wCertificateType != WIN_CERT_TYPE_TS_STACK_SIGNED/
1463	&& pCur->wCertificateType != WIN_CERT_TYPE_EFI_PKCS115
1464	&& pCur->wCertificateType != WIN_CERT_TYPE_EFI_GUID
1465	)
1466	{
1467	Log(("rtldrPEOpen: %s: cert at %#x/%#x: wRevision=%#x\n", pszLogName, off, Dir.Size, pCur->wRevision));
1468	rc = pCur->wCertificateType ? VERR_LDRPE_CERT_UNSUPPORTED : VERR_LDRPE_CERT_MALFORMED;
1469	break;
1470	}
1471
1472	/** @todo Rainy Day: Implement further verfication using openssl. */
1473
1474	/* next */
1475	off += cbCur;
1476	pCur = (PWIN_CERTIFICATE)((uint8_t *)pCur + cbCur);
1477	} while (off < Dir.Size);
1478	}
1479	RTMemTmpFree(pFirst);
1480	if (RT_FAILURE(rc))
1481	return rc;
1482	}
1483
1484
1485	return VINF_SUCCESS;
1486	}
1487
1488
1489	/**
1490	* Open a PE image.
1491	*
1492	* @returns iprt status code.
1493	* @param pReader The loader reader instance which will provide the raw image bits.
1494	* @param fFlags Reserved, MBZ.
1495	* @param enmArch Architecture specifier.
1496	* @param offNtHdrs The offset of the NT headers (where you find "PE\0\0").
1497	* @param phLdrMod Where to store the handle.
1498	*/
1499	int rtldrPEOpen(PRTLDRREADER pReader, uint32_t fFlags, RTLDRARCH enmArch, RTFOFF offNtHdrs, PRTLDRMOD phLdrMod)
1500	{
1501	/*
1502	* Read and validate the file header.
1503	*/
1504	IMAGE_FILE_HEADER FileHdr;
1505	int rc = pReader->pfnRead(pReader, &FileHdr, sizeof(FileHdr), offNtHdrs + 4);
1506	if (RT_FAILURE(rc))
1507	return rc;
1508	RTLDRARCH enmArchImage;
1509	const char *pszLogName = pReader->pfnLogName(pReader);
1510	rc = rtldrPEValidateFileHeader(&FileHdr, pszLogName, &enmArchImage);
1511	if (RT_FAILURE(rc))
1512	return rc;
1513
1514	/*
1515	* Match the CPU architecture.
1516	*/
1517	if ( enmArch != RTLDRARCH_WHATEVER
1518	&& enmArch != enmArchImage)
1519	return VERR_LDR_ARCH_MISMATCH;
1520
1521	/*
1522	* Read and validate the "optional" header. Convert 32->64 if necessary.
1523	*/
1524	IMAGE_OPTIONAL_HEADER64 OptHdr;
1525	rc = pReader->pfnRead(pReader, &OptHdr, FileHdr.SizeOfOptionalHeader, offNtHdrs + 4 + sizeof(IMAGE_FILE_HEADER));
1526	if (RT_FAILURE(rc))
1527	return rc;
1528	if (FileHdr.SizeOfOptionalHeader != sizeof(OptHdr))
1529	rtldrPEConvert32BitOptionalHeaderTo64Bit(&OptHdr);
1530	rc = rtldrPEValidateOptionalHeader(&OptHdr, pszLogName, offNtHdrs, &FileHdr, pReader->pfnSize(pReader));
1531	if (RT_FAILURE(rc))
1532	return rc;
1533
1534	/*
1535	* Read and validate section headers.
1536	*/
1537	const size_t cbSections = sizeof(IMAGE_SECTION_HEADER) * FileHdr.NumberOfSections;
1538	PIMAGE_SECTION_HEADER paSections = (PIMAGE_SECTION_HEADER)RTMemAlloc(cbSections);
1539	if (!paSections)
1540	return VERR_NO_MEMORY;
1541	rc = pReader->pfnRead(pReader, paSections, cbSections, offNtHdrs + 4 + sizeof(IMAGE_FILE_HEADER) + FileHdr.SizeOfOptionalHeader);
1542	if (RT_SUCCESS(rc))
1543	{
1544	rc = rtldrPEValidateSectionHeaders(paSections, FileHdr.NumberOfSections, pszLogName,
1545	&OptHdr, pReader->pfnSize(pReader));
1546	if (RT_SUCCESS(rc))
1547	{
1548	/*
1549	* Allocate and initialize the PE module structure.
1550	*/
1551	PRTLDRMODPE pModPe = (PRTLDRMODPE)RTMemAllocZ(sizeof(*pModPe));
1552	if (pModPe)
1553	{
1554	pModPe->Core.u32Magic = RTLDRMOD_MAGIC;
1555	pModPe->Core.eState = LDR_STATE_OPENED;
1556	if (FileHdr.SizeOfOptionalHeader == sizeof(OptHdr))
1557	pModPe->Core.pOps = &s_rtldrPE64Ops.Core;
1558	else
1559	pModPe->Core.pOps = &s_rtldrPE32Ops.Core;
1560	pModPe->pReader = pReader;
1561	pModPe->pvBits = NULL;
1562	pModPe->offNtHdrs = offNtHdrs;
1563	pModPe->u16Machine = FileHdr.Machine;
1564	pModPe->fFile = FileHdr.Characteristics;
1565	pModPe->cSections = FileHdr.NumberOfSections;
1566	pModPe->paSections = paSections;
1567	pModPe->uEntryPointRVA= OptHdr.AddressOfEntryPoint;
1568	pModPe->uImageBase = (RTUINTPTR)OptHdr.ImageBase;
1569	pModPe->cbImage = OptHdr.SizeOfImage;
1570	pModPe->cbHeaders = OptHdr.SizeOfHeaders;
1571	pModPe->ImportDir = OptHdr.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT];
1572	pModPe->RelocDir = OptHdr.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
1573	pModPe->ExportDir = OptHdr.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT];
1574
1575	/*
1576	* Perform validation of some selected data directories which requires
1577	* inspection of the actual data.
1578	*/
1579	rc = rtldrPEValidateDirectories(pModPe, &OptHdr);
1580	if (RT_SUCCESS(rc))
1581	{
1582	*phLdrMod = &pModPe->Core;
1583	return VINF_SUCCESS;
1584	}
1585	RTMemFree(pModPe);
1586	}
1587	else
1588	rc = VERR_NO_MEMORY;
1589	}
1590	}
1591	RTMemFree(paSections);
1592	return rc;
1593	}
1594

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source: vbox/trunk/src/VBox/Runtime/common/ldr/ldrPE.cpp@ 31396

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