ldrPE.cpp@ 43172

Last change on this file since 43172 was 41785, checked in by vboxsync, 13 years ago
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1	/* $Id: ldrPE.cpp 41785 2012-06-16 19:38:41Z 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)(uintptr_t)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)(uintptr_t)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	NOREF(fFlags); /* ignored ... */
675
676	/*
677	* Check if there is actually anything to work on.
678	*/
679	if ( !pModPe->ExportDir.VirtualAddress
680	\|\| !pModPe->ExportDir.Size)
681	return VERR_SYMBOL_NOT_FOUND;
682
683	/*
684	* No bits supplied? Do we need to read the bits?
685	*/
686	if (!pvBits)
687	{
688	if (!pModPe->pvBits)
689	{
690	int rc = rtldrPEReadBits(pModPe);
691	if (RT_FAILURE(rc))
692	return rc;
693	}
694	pvBits = pModPe->pvBits;
695	}
696
697	/*
698	* We enumerates by ordinal, which means using a slow linear search for
699	* getting any name
700	*/
701	PIMAGE_EXPORT_DIRECTORY pExpDir = PE_RVA2TYPE(pvBits, pModPe->ExportDir.VirtualAddress, PIMAGE_EXPORT_DIRECTORY);
702	uint32_t paAddress = PE_RVA2TYPE(pvBits, pExpDir->AddressOfFunctions, uint32_t );
703	uint32_t paRVANames = PE_RVA2TYPE(pvBits, pExpDir->AddressOfNames, uint32_t );
704	uint16_t paOrdinals = PE_RVA2TYPE(pvBits, pExpDir->AddressOfNameOrdinals, uint16_t );
705	uintptr_t uNamePrev = 0;
706	unsigned cOrdinals = RT_MAX(pExpDir->NumberOfNames, pExpDir->NumberOfFunctions);
707	for (unsigned uOrdinal = 0; uOrdinal < cOrdinals; uOrdinal++)
708	{
709	if (paAddress[uOrdinal] /* needed? */)
710	{
711	/*
712	* Look for name.
713	*/
714	const char *pszName = NULL;
715	/* Search from previous + 1 to the end. */
716	unsigned uName = uNamePrev + 1;
717	while (uName < pExpDir->NumberOfNames)
718	{
719	if (paOrdinals[uName] == uOrdinal)
720	{
721	pszName = PE_RVA2TYPE(pvBits, paRVANames[uName], const char *);
722	uNamePrev = uName;
723	break;
724	}
725	uName++;
726	}
727	if (!pszName)
728	{
729	/* Search from start to the previous. */
730	uName = 0;
731	for (uName = 0 ; uName <= uNamePrev; uName++)
732	{
733	if (paOrdinals[uName] == uOrdinal)
734	{
735	pszName = PE_RVA2TYPE(pvBits, paRVANames[uName], const char *);
736	uNamePrev = uName;
737	break;
738	}
739	}
740	}
741
742	/*
743	* Get address.
744	*/
745	uintptr_t uRVAExport = paAddress[uOrdinal];
746	RTUINTPTR Value;
747	if ( uRVAExport - (uintptr_t)pModPe->ExportDir.VirtualAddress
748	< pModPe->ExportDir.Size)
749	{
750	/* Resolve forwarder. */
751	AssertMsgFailed(("Forwarders are not supported!\n"));
752	continue;
753	}
754	else
755	/* Get plain export address */
756	Value = PE_RVA2TYPE(BaseAddress, uRVAExport, RTUINTPTR);
757
758	/*
759	* Call back.
760	*/
761	int rc = pfnCallback(pMod, pszName, uOrdinal + pExpDir->Base, Value, pvUser);
762	if (rc)
763	return rc;
764	}
765	}
766
767	return VINF_SUCCESS;
768	}
769
770
771	/** @copydoc RTLDROPS::pfnEnumDbgInfo. */
772	static DECLCALLBACK(int) rtldrPE_EnumDbgInfo(PRTLDRMODINTERNAL pMod, const void *pvBits,
773	PFNRTLDRENUMDBG pfnCallback, void *pvUser)
774	{
775	NOREF(pMod); NOREF(pvBits); NOREF(pfnCallback); NOREF(pvUser);
776	return VINF_NOT_SUPPORTED;
777	}
778
779
780	/** @copydoc RTLDROPS::pfnEnumSegments. */
781	static DECLCALLBACK(int) rtldrPE_EnumSegments(PRTLDRMODINTERNAL pMod, PFNRTLDRENUMSEGS pfnCallback, void *pvUser)
782	{
783	NOREF(pMod); NOREF(pfnCallback); NOREF(pvUser);
784	return VINF_NOT_SUPPORTED;
785	}
786
787
788	/** @copydoc RTLDROPS::pfnLinkAddressToSegOffset. */
789	static DECLCALLBACK(int) rtldrPE_LinkAddressToSegOffset(PRTLDRMODINTERNAL pMod, RTLDRADDR LinkAddress,
790	uint32_t *piSeg, PRTLDRADDR poffSeg)
791	{
792	NOREF(pMod); NOREF(LinkAddress); NOREF(piSeg); NOREF(poffSeg);
793	return VERR_NOT_IMPLEMENTED;
794	}
795
796
797	/** @copydoc RTLDROPS::pfnLinkAddressToRva. */
798	static DECLCALLBACK(int) rtldrPE_LinkAddressToRva(PRTLDRMODINTERNAL pMod, RTLDRADDR LinkAddress, PRTLDRADDR pRva)
799	{
800	NOREF(pMod); NOREF(LinkAddress); NOREF(pRva);
801	return VERR_NOT_IMPLEMENTED;
802	}
803
804
805	/** @copydoc RTLDROPS::pfnSegOffsetToRva. */
806	static DECLCALLBACK(int) rtldrPE_SegOffsetToRva(PRTLDRMODINTERNAL pMod, uint32_t iSeg, RTLDRADDR offSeg,
807	PRTLDRADDR pRva)
808	{
809	NOREF(pMod); NOREF(iSeg); NOREF(offSeg); NOREF(pRva);
810	return VERR_NOT_IMPLEMENTED;
811	}
812
813
814	/** @copydoc RTLDROPS::pfnRvaToSegOffset. */
815	static DECLCALLBACK(int) rtldrPE_RvaToSegOffset(PRTLDRMODINTERNAL pMod, RTLDRADDR Rva,
816	uint32_t *piSeg, PRTLDRADDR poffSeg)
817	{
818	NOREF(pMod); NOREF(Rva); NOREF(piSeg); NOREF(poffSeg);
819	return VERR_NOT_IMPLEMENTED;
820	}
821
822
823	/** @copydoc RTLDROPS::pfnDone */
824	static DECLCALLBACK(int) rtldrPEDone(PRTLDRMODINTERNAL pMod)
825	{
826	PRTLDRMODPE pModPe = (PRTLDRMODPE)pMod;
827	if (pModPe->pvBits)
828	{
829	RTMemFree(pModPe->pvBits);
830	pModPe->pvBits = NULL;
831	}
832	if (pModPe->pReader)
833	{
834	int rc = pModPe->pReader->pfnDestroy(pModPe->pReader);
835	AssertRC(rc);
836	pModPe->pReader = NULL;
837	}
838	return VINF_SUCCESS;
839	}
840
841	/** @copydoc RTLDROPS::pfnClose */
842	static DECLCALLBACK(int) rtldrPEClose(PRTLDRMODINTERNAL pMod)
843	{
844	PRTLDRMODPE pModPe = (PRTLDRMODPE)pMod;
845	if (pModPe->paSections)
846	{
847	RTMemFree(pModPe->paSections);
848	pModPe->paSections = NULL;
849	}
850	if (pModPe->pvBits)
851	{
852	RTMemFree(pModPe->pvBits);
853	pModPe->pvBits = NULL;
854	}
855	if (pModPe->pReader)
856	{
857	int rc = pModPe->pReader->pfnDestroy(pModPe->pReader);
858	AssertRC(rc);
859	pModPe->pReader = NULL;
860	}
861	return VINF_SUCCESS;
862	}
863
864
865	/**
866	* Operations for a 32-bit PE module.
867	*/
868	static const RTLDROPSPE s_rtldrPE32Ops =
869	{
870	{
871	"pe32",
872	rtldrPEClose,
873	NULL,
874	rtldrPEDone,
875	rtldrPEEnumSymbols,
876	/* ext */
877	rtldrPEGetImageSize,
878	rtldrPEGetBits,
879	rtldrPERelocate,
880	rtldrPEGetSymbolEx,
881	rtldrPE_EnumDbgInfo,
882	rtldrPE_EnumSegments,
883	rtldrPE_LinkAddressToSegOffset,
884	rtldrPE_LinkAddressToRva,
885	rtldrPE_SegOffsetToRva,
886	rtldrPE_RvaToSegOffset,
887	42
888	},
889	rtldrPEResolveImports32,
890	42
891	};
892
893
894	/**
895	* Operations for a 64-bit PE module.
896	*/
897	static const RTLDROPSPE s_rtldrPE64Ops =
898	{
899	{
900	"pe64",
901	rtldrPEClose,
902	NULL,
903	rtldrPEDone,
904	rtldrPEEnumSymbols,
905	/* ext */
906	rtldrPEGetImageSize,
907	rtldrPEGetBits,
908	rtldrPERelocate,
909	rtldrPEGetSymbolEx,
910	rtldrPE_EnumDbgInfo,
911	rtldrPE_EnumSegments,
912	rtldrPE_LinkAddressToSegOffset,
913	rtldrPE_LinkAddressToRva,
914	rtldrPE_SegOffsetToRva,
915	rtldrPE_RvaToSegOffset,
916	42
917	},
918	rtldrPEResolveImports64,
919	42
920	};
921
922
923	/**
924	* Converts the optional header from 32 bit to 64 bit.
925	* This is a rather simple task, if you start from the right end.
926	*
927	* @param pOptHdr On input this is a PIMAGE_OPTIONAL_HEADER32.
928	* On output this will be a PIMAGE_OPTIONAL_HEADER64.
929	*/
930	static void rtldrPEConvert32BitOptionalHeaderTo64Bit(PIMAGE_OPTIONAL_HEADER64 pOptHdr)
931	{
932	/*
933	* volatile everywhere! Trying to prevent the compiler being a smarta$$ and reorder stuff.
934	*/
935	IMAGE_OPTIONAL_HEADER32 volatile pOptHdr32 = (IMAGE_OPTIONAL_HEADER32 volatile )pOptHdr;
936	IMAGE_OPTIONAL_HEADER64 volatile *pOptHdr64 = pOptHdr;
937
938	/* from LoaderFlags and out the difference is 4 * 32-bits. */
939	Assert(RT_OFFSETOF(IMAGE_OPTIONAL_HEADER32, LoaderFlags) + 16 == RT_OFFSETOF(IMAGE_OPTIONAL_HEADER64, LoaderFlags));
940	Assert( RT_OFFSETOF(IMAGE_OPTIONAL_HEADER32, DataDirectory[IMAGE_NUMBEROF_DIRECTORY_ENTRIES]) + 16
941	== RT_OFFSETOF(IMAGE_OPTIONAL_HEADER64, DataDirectory[IMAGE_NUMBEROF_DIRECTORY_ENTRIES]));
942	uint32_t volatile pu32Dst = (uint32_t )&pOptHdr64->DataDirectory[IMAGE_NUMBEROF_DIRECTORY_ENTRIES] - 1;
943	const uint32_t volatile pu32Src = (uint32_t )&pOptHdr32->DataDirectory[IMAGE_NUMBEROF_DIRECTORY_ENTRIES] - 1;
944	const uint32_t volatile pu32SrcLast = (uint32_t )&pOptHdr32->LoaderFlags;
945	while (pu32Src >= pu32SrcLast)
946	pu32Dst-- = pu32Src--;
947
948	/* the previous 4 fields are 32/64 and needs special attention. */
949	pOptHdr64->SizeOfHeapCommit = pOptHdr32->SizeOfHeapCommit;
950	pOptHdr64->SizeOfHeapReserve = pOptHdr32->SizeOfHeapReserve;
951	pOptHdr64->SizeOfStackCommit = pOptHdr32->SizeOfStackCommit;
952	uint32_t u32SizeOfStackReserve = pOptHdr32->SizeOfStackReserve;
953	pOptHdr64->SizeOfStackReserve = u32SizeOfStackReserve;
954
955	/* The rest matches except for BaseOfData which has been merged into ImageBase in the 64-bit version..
956	* Thus, ImageBase needs some special treatment. It will probably work fine assigning one to the
957	* other since this is all declared volatile, but taking now chances, we'll use a temp variable.
958	*/
959	Assert(RT_OFFSETOF(IMAGE_OPTIONAL_HEADER32, SizeOfStackReserve) == RT_OFFSETOF(IMAGE_OPTIONAL_HEADER64, SizeOfStackReserve));
960	Assert(RT_OFFSETOF(IMAGE_OPTIONAL_HEADER32, BaseOfData) == RT_OFFSETOF(IMAGE_OPTIONAL_HEADER64, ImageBase));
961	Assert(RT_OFFSETOF(IMAGE_OPTIONAL_HEADER32, SectionAlignment) == RT_OFFSETOF(IMAGE_OPTIONAL_HEADER64, SectionAlignment));
962	uint32_t u32ImageBase = pOptHdr32->ImageBase;
963	pOptHdr64->ImageBase = u32ImageBase;
964	}
965
966
967	/**
968	* Converts the load config directory from 32 bit to 64 bit.
969	* This is a rather simple task, if you start from the right end.
970	*
971	* @param pLoadCfg On input this is a PIMAGE_LOAD_CONFIG_DIRECTORY32.
972	* On output this will be a PIMAGE_LOAD_CONFIG_DIRECTORY64.
973	*/
974	static void rtldrPEConvert32BitLoadConfigTo64Bit(PIMAGE_LOAD_CONFIG_DIRECTORY64 pLoadCfg)
975	{
976	/*
977	* volatile everywhere! Trying to prevent the compiler being a smarta$$ and reorder stuff.
978	*/
979	IMAGE_LOAD_CONFIG_DIRECTORY32 volatile pLoadCfg32 = (IMAGE_LOAD_CONFIG_DIRECTORY32 volatile )pLoadCfg;
980	IMAGE_LOAD_CONFIG_DIRECTORY64 volatile *pLoadCfg64 = pLoadCfg;
981
982	pLoadCfg64->SEHandlerCount = pLoadCfg32->SEHandlerCount;
983	pLoadCfg64->SEHandlerTable = pLoadCfg32->SEHandlerTable;
984	pLoadCfg64->SecurityCookie = pLoadCfg32->SecurityCookie;
985	pLoadCfg64->EditList = pLoadCfg32->EditList;
986	pLoadCfg64->Reserved1 = pLoadCfg32->Reserved1;
987	pLoadCfg64->CSDVersion = pLoadCfg32->CSDVersion;
988	pLoadCfg64->ProcessHeapFlags = pLoadCfg32->ProcessHeapFlags; /* switched place with ProcessAffinityMask, but we're more than 16 byte off by now so it doesn't matter. */
989	pLoadCfg64->ProcessAffinityMask = pLoadCfg32->ProcessAffinityMask;
990	pLoadCfg64->VirtualMemoryThreshold = pLoadCfg32->VirtualMemoryThreshold;
991	pLoadCfg64->MaximumAllocationSize = pLoadCfg32->MaximumAllocationSize;
992	pLoadCfg64->LockPrefixTable = pLoadCfg32->LockPrefixTable;
993	pLoadCfg64->DeCommitTotalFreeThreshold = pLoadCfg32->DeCommitTotalFreeThreshold;
994	uint32_t u32DeCommitFreeBlockThreshold = pLoadCfg32->DeCommitFreeBlockThreshold;
995	pLoadCfg64->DeCommitFreeBlockThreshold = u32DeCommitFreeBlockThreshold;
996	/* the rest is equal. */
997	Assert( RT_OFFSETOF(IMAGE_LOAD_CONFIG_DIRECTORY32, DeCommitFreeBlockThreshold)
998	== RT_OFFSETOF(IMAGE_LOAD_CONFIG_DIRECTORY64, DeCommitFreeBlockThreshold));
999	}
1000
1001
1002	/**
1003	* Validates the file header.
1004	*
1005	* @returns iprt status code.
1006	* @param pFileHdr Pointer to the file header that needs validating.
1007	* @param pszLogName The log name to prefix the errors with.
1008	* @param penmArch Where to store the CPU architecture.
1009	*/
1010	int rtldrPEValidateFileHeader(PIMAGE_FILE_HEADER pFileHdr, const char *pszLogName, PRTLDRARCH penmArch)
1011	{
1012	size_t cbOptionalHeader;
1013	switch (pFileHdr->Machine)
1014	{
1015	case IMAGE_FILE_MACHINE_I386:
1016	cbOptionalHeader = sizeof(IMAGE_OPTIONAL_HEADER32);
1017	*penmArch = RTLDRARCH_X86_32;
1018	break;
1019	case IMAGE_FILE_MACHINE_AMD64:
1020	cbOptionalHeader = sizeof(IMAGE_OPTIONAL_HEADER64);
1021	*penmArch = RTLDRARCH_AMD64;
1022	break;
1023
1024	default:
1025	Log(("rtldrPEOpen: %s: Unsupported Machine=%#x\n",
1026	pszLogName, pFileHdr->Machine));
1027	*penmArch = RTLDRARCH_INVALID;
1028	return VERR_BAD_EXE_FORMAT;
1029	}
1030	if (pFileHdr->SizeOfOptionalHeader != cbOptionalHeader)
1031	{
1032	Log(("rtldrPEOpen: %s: SizeOfOptionalHeader=%#x expected %#x\n",
1033	pszLogName, pFileHdr->SizeOfOptionalHeader, cbOptionalHeader));
1034	return VERR_BAD_EXE_FORMAT;
1035	}
1036	/* This restriction needs to be implemented elsewhere. */
1037	if (pFileHdr->Characteristics & IMAGE_FILE_RELOCS_STRIPPED)
1038	{
1039	Log(("rtldrPEOpen: %s: IMAGE_FILE_RELOCS_STRIPPED\n", pszLogName));
1040	return VERR_BAD_EXE_FORMAT;
1041	}
1042	if (pFileHdr->NumberOfSections > 42)
1043	{
1044	Log(("rtldrPEOpen: %s: NumberOfSections=%d - our limit is 42, please raise it if the binary makes sense.(!!!)\n",
1045	pszLogName, pFileHdr->NumberOfSections));
1046	return VERR_BAD_EXE_FORMAT;
1047	}
1048	if (pFileHdr->NumberOfSections < 1)
1049	{
1050	Log(("rtldrPEOpen: %s: NumberOfSections=%d - we can't have an image without sections (!!!)\n",
1051	pszLogName, pFileHdr->NumberOfSections));
1052	return VERR_BAD_EXE_FORMAT;
1053	}
1054	return VINF_SUCCESS;
1055	}
1056
1057
1058	/**
1059	* Validates the optional header (64/32-bit)
1060	*
1061	* @returns iprt status code.
1062	* @param pOptHdr Pointer to the optional header which needs validation.
1063	* @param pszLogName The log name to prefix the errors with.
1064	* @param offNtHdrs The offset of the NT headers from the start of the file.
1065	* @param pFileHdr Pointer to the file header (valid).
1066	* @param cbRawImage The raw image size.
1067	*/
1068	static int rtldrPEValidateOptionalHeader(const IMAGE_OPTIONAL_HEADER64 pOptHdr, const char pszLogName, RTFOFF offNtHdrs,
1069	const IMAGE_FILE_HEADER *pFileHdr, RTFOFF cbRawImage)
1070	{
1071	const uint16_t CorrectMagic = pFileHdr->SizeOfOptionalHeader == sizeof(IMAGE_OPTIONAL_HEADER32)
1072	? IMAGE_NT_OPTIONAL_HDR32_MAGIC : IMAGE_NT_OPTIONAL_HDR64_MAGIC;
1073	if (pOptHdr->Magic != CorrectMagic)
1074	{
1075	Log(("rtldrPEOpen: %s: Magic=%#x - expected %#x!!!\n", pszLogName, pOptHdr->Magic, CorrectMagic));
1076	return VERR_BAD_EXE_FORMAT;
1077	}
1078	const uint32_t cbImage = pOptHdr->SizeOfImage;
1079	if (cbImage > _1G)
1080	{
1081	Log(("rtldrPEOpen: %s: SizeOfImage=%#x - Our limit is 1GB (%#x)!!!\n", pszLogName, cbImage, _1G));
1082	return VERR_BAD_EXE_FORMAT;
1083	}
1084	const uint32_t cbMinImageSize = pFileHdr->SizeOfOptionalHeader + sizeof(*pFileHdr) + 4 + (uint32_t)offNtHdrs;
1085	if (cbImage < cbMinImageSize)
1086	{
1087	Log(("rtldrPEOpen: %s: SizeOfImage=%#x to small, minimum %#x!!!\n", pszLogName, cbImage, cbMinImageSize));
1088	return VERR_BAD_EXE_FORMAT;
1089	}
1090	if (pOptHdr->AddressOfEntryPoint >= cbImage)
1091	{
1092	Log(("rtldrPEOpen: %s: AddressOfEntryPoint=%#x - beyond image size (%#x)!!!\n",
1093	pszLogName, pOptHdr->AddressOfEntryPoint, cbImage));
1094	return VERR_BAD_EXE_FORMAT;
1095	}
1096	if (pOptHdr->BaseOfCode >= cbImage)
1097	{
1098	Log(("rtldrPEOpen: %s: BaseOfCode=%#x - beyond image size (%#x)!!!\n",
1099	pszLogName, pOptHdr->BaseOfCode, cbImage));
1100	return VERR_BAD_EXE_FORMAT;
1101	}
1102	#if 0/* only in 32-bit header */
1103	if (pOptHdr->BaseOfData >= cbImage)
1104	{
1105	Log(("rtldrPEOpen: %s: BaseOfData=%#x - beyond image size (%#x)!!!\n",
1106	pszLogName, pOptHdr->BaseOfData, cbImage));
1107	return VERR_BAD_EXE_FORMAT;
1108	}
1109	#endif
1110	if (pOptHdr->SizeOfHeaders >= cbImage)
1111	{
1112	Log(("rtldrPEOpen: %s: SizeOfHeaders=%#x - beyond image size (%#x)!!!\n",
1113	pszLogName, pOptHdr->SizeOfHeaders, cbImage));
1114	return VERR_BAD_EXE_FORMAT;
1115	}
1116	/* don't know how to do the checksum, so ignore it. */
1117	if (pOptHdr->Subsystem == IMAGE_SUBSYSTEM_UNKNOWN)
1118	{
1119	Log(("rtldrPEOpen: %s: Subsystem=%#x (unknown)!!!\n", pszLogName, pOptHdr->Subsystem));
1120	return VERR_BAD_EXE_FORMAT;
1121	}
1122	if (pOptHdr->SizeOfHeaders < cbMinImageSize + pFileHdr->NumberOfSections * sizeof(IMAGE_SECTION_HEADER))
1123	{
1124	Log(("rtldrPEOpen: %s: SizeOfHeaders=%#x - cbMinImageSize %#x + sections %#x = %#llx!!!\n",
1125	pszLogName, pOptHdr->SizeOfHeaders,
1126	cbImage, cbMinImageSize, pFileHdr->NumberOfSections * sizeof(IMAGE_SECTION_HEADER),
1127	cbMinImageSize + pFileHdr->NumberOfSections * sizeof(IMAGE_SECTION_HEADER)));
1128	return VERR_BAD_EXE_FORMAT;
1129	}
1130	if (pOptHdr->SizeOfStackReserve < pOptHdr->SizeOfStackCommit)
1131	{
1132	Log(("rtldrPEOpen: %s: SizeOfStackReserve %#x < SizeOfStackCommit %#x!!!\n",
1133	pszLogName, pOptHdr->SizeOfStackReserve, pOptHdr->SizeOfStackCommit));
1134	return VERR_BAD_EXE_FORMAT;
1135	}
1136	if (pOptHdr->SizeOfHeapReserve < pOptHdr->SizeOfHeapCommit)
1137	{
1138	Log(("rtldrPEOpen: %s: SizeOfStackReserve %#x < SizeOfStackCommit %#x!!!\n",
1139	pszLogName, pOptHdr->SizeOfStackReserve, pOptHdr->SizeOfStackCommit));
1140	return VERR_BAD_EXE_FORMAT;
1141	}
1142
1143	/* DataDirectory */
1144	if (pOptHdr->NumberOfRvaAndSizes != RT_ELEMENTS(pOptHdr->DataDirectory))
1145	{
1146	Log(("rtldrPEOpen: %s: NumberOfRvaAndSizes=%d!!!\n", pszLogName, pOptHdr->NumberOfRvaAndSizes));
1147	return VERR_BAD_EXE_FORMAT;
1148	}
1149	for (unsigned i = 0; i < RT_ELEMENTS(pOptHdr->DataDirectory); i++)
1150	{
1151	IMAGE_DATA_DIRECTORY const *pDir = &pOptHdr->DataDirectory[i];
1152	if (!pDir->Size)
1153	continue;
1154	size_t cb = cbImage;
1155	switch (i)
1156	{
1157	case IMAGE_DIRECTORY_ENTRY_EXPORT: // 0
1158	case IMAGE_DIRECTORY_ENTRY_IMPORT: // 1
1159	case IMAGE_DIRECTORY_ENTRY_RESOURCE: // 2
1160	case IMAGE_DIRECTORY_ENTRY_EXCEPTION: // 3
1161	case IMAGE_DIRECTORY_ENTRY_BASERELOC: // 5
1162	case IMAGE_DIRECTORY_ENTRY_DEBUG: // 6
1163	case IMAGE_DIRECTORY_ENTRY_COPYRIGHT: // 7
1164	case IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT: // 11
1165	case IMAGE_DIRECTORY_ENTRY_IAT: // 12 /* Import Address Table */
1166	break;
1167	case IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG: // 10 - need to check for lock prefixes.
1168	/* Delay inspection after section table is validated. */
1169	break;
1170
1171	case IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT: // 13
1172	Log(("rtldrPEOpen: %s: dir no. %d (DELAY_IMPORT) VirtualAddress=%#x Size=%#x is not supported!!!\n",
1173	pszLogName, i, pDir->VirtualAddress, pDir->Size));
1174	return VERR_LDRPE_DELAY_IMPORT;
1175
1176	case IMAGE_DIRECTORY_ENTRY_SECURITY: // 4
1177	/* The VirtualAddress is a PointerToRawData. */
1178	cb = (size_t)cbRawImage; Assert((RTFOFF)cb == cbRawImage);
1179	Log(("rtldrPEOpen: %s: dir no. %d (SECURITY) VirtualAddress=%#x Size=%#x is not supported!!!\n",
1180	pszLogName, i, pDir->VirtualAddress, pDir->Size));
1181	if (pDir->Size < sizeof(WIN_CERTIFICATE))
1182	{
1183	Log(("rtldrPEOpen: %s: Security directory is too small: %#x bytes\n", pszLogName, i, pDir->Size));
1184	return VERR_LDRPE_CERT_MALFORMED;
1185	}
1186	if (pDir->Size >= _1M)
1187	{
1188	Log(("rtldrPEOpen: %s: Security directory is too large: %#x bytes\n", pszLogName, i, pDir->Size));
1189	return VERR_LDRPE_CERT_MALFORMED;
1190	}
1191	if (pDir->VirtualAddress & 7)
1192	{
1193	Log(("rtldrPEOpen: %s: Security directory is misaligned: %#x\n", pszLogName, i, pDir->VirtualAddress));
1194	return VERR_LDRPE_CERT_MALFORMED;
1195	}
1196	break;
1197
1198	case IMAGE_DIRECTORY_ENTRY_GLOBALPTR: // 8 /* (MIPS GP) */
1199	Log(("rtldrPEOpen: %s: dir no. %d (GLOBALPTR) VirtualAddress=%#x Size=%#x is not supported!!!\n",
1200	pszLogName, i, pDir->VirtualAddress, pDir->Size));
1201	return VERR_LDRPE_GLOBALPTR;
1202
1203	case IMAGE_DIRECTORY_ENTRY_TLS: // 9
1204	Log(("rtldrPEOpen: %s: dir no. %d (TLS) VirtualAddress=%#x Size=%#x is not supported!!!\n",
1205	pszLogName, i, pDir->VirtualAddress, pDir->Size));
1206	return VERR_LDRPE_TLS;
1207
1208	case IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR:// 14
1209	Log(("rtldrPEOpen: %s: dir no. %d (COM_DESCRIPTOR) VirtualAddress=%#x Size=%#x is not supported!!!\n",
1210	pszLogName, i, pDir->VirtualAddress, pDir->Size));
1211	return VERR_LDRPE_COM_DESCRIPTOR;
1212
1213	default:
1214	Log(("rtldrPEOpen: %s: dir no. %d VirtualAddress=%#x Size=%#x is not supported!!!\n",
1215	pszLogName, i, pDir->VirtualAddress, pDir->Size));
1216	return VERR_BAD_EXE_FORMAT;
1217	}
1218	if (pDir->VirtualAddress >= cb)
1219	{
1220	Log(("rtldrPEOpen: %s: dir no. %d VirtualAddress=%#x is invalid (limit %#x)!!!\n",
1221	pszLogName, i, pDir->VirtualAddress, cb));
1222	return VERR_BAD_EXE_FORMAT;
1223	}
1224	if (pDir->Size > cb - pDir->VirtualAddress)
1225	{
1226	Log(("rtldrPEOpen: %s: dir no. %d Size=%#x is invalid (rva=%#x, limit=%#x)!!!\n",
1227	pszLogName, i, pDir->Size, pDir->VirtualAddress, cb));
1228	return VERR_BAD_EXE_FORMAT;
1229	}
1230	}
1231	return VINF_SUCCESS;
1232	}
1233
1234
1235	/**
1236	* Validates the section headers.
1237	*
1238	* @returns iprt status code.
1239	* @param paSections Pointer to the array of sections that is to be validated.
1240	* @param cSections Number of sections in that array.
1241	* @param pszLogName The log name to prefix the errors with.
1242	* @param pOptHdr Pointer to the optional header (valid).
1243	* @param cbRawImage The raw image size.
1244	*/
1245	int rtldrPEValidateSectionHeaders(const IMAGE_SECTION_HEADER paSections, unsigned cSections, const char pszLogName,
1246	const IMAGE_OPTIONAL_HEADER64 *pOptHdr, RTFOFF cbRawImage)
1247	{
1248	const uint32_t cbImage = pOptHdr->SizeOfImage;
1249	const IMAGE_SECTION_HEADER *pSH = &paSections[0];
1250	uint32_t uRvaPrev = pOptHdr->SizeOfHeaders;
1251	Log3(("RTLdrPE: Section Headers:\n"));
1252	for (unsigned cSHdrsLeft = cSections; cSHdrsLeft > 0; cSHdrsLeft--, pSH++)
1253	{
1254	const unsigned iSH = pSH - &paSections[0]; NOREF(iSH);
1255	Log3(("RTLdrPE: #%d '%-8.8s' Characteristics: %08RX32\n"
1256	"RTLdrPE: VirtAddr: %08RX32 VirtSize: %08RX32\n"
1257	"RTLdrPE: FileOff: %08RX32 FileSize: %08RX32\n"
1258	"RTLdrPE: RelocOff: %08RX32 #Relocs: %08RX32\n"
1259	"RTLdrPE: LineOff: %08RX32 #Lines: %08RX32\n",
1260	iSH, pSH->Name, pSH->Characteristics,
1261	pSH->VirtualAddress, pSH->Misc.VirtualSize,
1262	pSH->PointerToRawData, pSH->SizeOfRawData,
1263	pSH->PointerToRelocations, pSH->NumberOfRelocations,
1264	pSH->PointerToLinenumbers, pSH->NumberOfLinenumbers));
1265	if (pSH->Characteristics & (IMAGE_SCN_MEM_16BIT \| IMAGE_SCN_MEM_FARDATA \| IMAGE_SCN_MEM_PURGEABLE \| IMAGE_SCN_MEM_PRELOAD))
1266	{
1267	Log(("rtldrPEOpen: %s: Unsupported section flag(s) %#x section #%d '%.*s'!!!\n",
1268	pszLogName, pSH->Characteristics, iSH, sizeof(pSH->Name), pSH->Name));
1269	return VERR_BAD_EXE_FORMAT;
1270	}
1271
1272	if ( pSH->Misc.VirtualSize
1273	&& !(pSH->Characteristics & IMAGE_SCN_TYPE_NOLOAD)) /* binutils uses this for '.stab' even if it's reserved/obsoleted by MS. */
1274	{
1275	if (pSH->VirtualAddress < uRvaPrev)
1276	{
1277	Log(("rtldrPEOpen: %s: Overlaps previous section or sections aren't in ascending order, VirtualAddress=%#x uRvaPrev=%#x - section #%d '%.*s'!!!\n",
1278	pszLogName, pSH->VirtualAddress, uRvaPrev, iSH, sizeof(pSH->Name), pSH->Name));
1279	return VERR_BAD_EXE_FORMAT;
1280	}
1281	if (pSH->VirtualAddress > cbImage)
1282	{
1283	Log(("rtldrPEOpen: %s: VirtualAddress=%#x - beyond image size (%#x) - section #%d '%.*s'!!!\n",
1284	pszLogName, pSH->VirtualAddress, cbImage, iSH, sizeof(pSH->Name), pSH->Name));
1285	return VERR_BAD_EXE_FORMAT;
1286	}
1287
1288	if (pSH->VirtualAddress & (pOptHdr->SectionAlignment - 1)) //ASSUMES power of 2 alignment.
1289	{
1290	Log(("rtldrPEOpen: %s: VirtualAddress=%#x misaligned (%#x) - section #%d '%.*s'!!!\n",
1291	pszLogName, pSH->VirtualAddress, pOptHdr->SectionAlignment, iSH, sizeof(pSH->Name), pSH->Name));
1292	return VERR_BAD_EXE_FORMAT;
1293	}
1294
1295	#ifdef PE_FILE_OFFSET_EQUALS_RVA
1296	/* Our loader code assume rva matches the file offset. */
1297	if ( pSH->SizeOfRawData
1298	&& pSH->PointerToRawData != pSH->VirtualAddress)
1299	{
1300	Log(("rtldrPEOpen: %s: ASSUMPTION FAILED: file offset %#x != RVA %#x - section #%d '%.*s'!!!\n",
1301	pszLogName, pSH->PointerToRawData, pSH->VirtualAddress, iSH, sizeof(pSH->Name), pSH->Name));
1302	return VERR_BAD_EXE_FORMAT;
1303	}
1304	#endif
1305	}
1306
1307	///@todo only if SizeOfRawData > 0 ?
1308	if ( pSH->PointerToRawData > cbRawImage /// @todo pSH->PointerToRawData >= cbRawImage ?
1309	\|\| pSH->SizeOfRawData > cbRawImage
1310	\|\| pSH->PointerToRawData + pSH->SizeOfRawData > cbRawImage)
1311	{
1312	Log(("rtldrPEOpen: %s: PointerToRawData=%#x SizeOfRawData=%#x - beyond end of file (%#x) - section #%d '%.*s'!!!\n",
1313	pszLogName, pSH->PointerToRawData, pSH->SizeOfRawData, cbRawImage,
1314	iSH, sizeof(pSH->Name), pSH->Name));
1315	return VERR_BAD_EXE_FORMAT;
1316	}
1317
1318	if (pSH->PointerToRawData & (pOptHdr->FileAlignment - 1)) //ASSUMES power of 2 alignment.
1319	{
1320	Log(("rtldrPEOpen: %s: PointerToRawData=%#x misaligned (%#x) - section #%d '%.*s'!!!\n",
1321	pszLogName, pSH->PointerToRawData, pOptHdr->FileAlignment, iSH, sizeof(pSH->Name), pSH->Name));
1322	return VERR_BAD_EXE_FORMAT;
1323	}
1324
1325	/* ignore the relocations and linenumbers. */
1326
1327	uRvaPrev = pSH->VirtualAddress + pSH->Misc.VirtualSize;
1328	}
1329
1330	/** @todo r=bird: more sanity checks! */
1331	return VINF_SUCCESS;
1332	}
1333
1334
1335	/**
1336	* Reads image data by RVA using the section headers.
1337	*
1338	* @returns iprt status code.
1339	* @param pModPe The PE module instance.
1340	* @param pvBuf Where to store the bits.
1341	* @param cb Number of bytes to tread.
1342	* @param RVA Where to read from.
1343	*/
1344	static int rtldrPEReadRVA(PRTLDRMODPE pModPe, void *pvBuf, uint32_t cb, uint32_t RVA)
1345	{
1346	const IMAGE_SECTION_HEADER *pSH = pModPe->paSections;
1347	PRTLDRREADER pReader = pModPe->pReader;
1348	uint32_t cbRead;
1349	int rc;
1350
1351	/*
1352	* Is it the headers, i.e. prior to the first section.
1353	*/
1354	if (RVA < pModPe->cbHeaders)
1355	{
1356	cbRead = RT_MIN(pModPe->cbHeaders - RVA, cb);
1357	rc = pReader->pfnRead(pReader, pvBuf, cbRead, RVA);
1358	if ( cbRead == cb
1359	\|\| RT_FAILURE(rc))
1360	return rc;
1361	cb -= cbRead;
1362	RVA += cbRead;
1363	pvBuf = (uint8_t *)pvBuf + cbRead;
1364	}
1365
1366	/* In the zero space between headers and the first section? */
1367	if (RVA < pSH->VirtualAddress)
1368	{
1369	cbRead = RT_MIN(pSH->VirtualAddress - RVA, cb);
1370	memset(pvBuf, 0, cbRead);
1371	if (cbRead == cb)
1372	return VINF_SUCCESS;
1373	cb -= cbRead;
1374	RVA += cbRead;
1375	pvBuf = (uint8_t *)pvBuf + cbRead;
1376	}
1377
1378	/*
1379	* Iterate the sections.
1380	*/
1381	for (unsigned cLeft = pModPe->cSections;
1382	cLeft > 0;
1383	cLeft--, pSH++)
1384	{
1385	uint32_t off = RVA - pSH->VirtualAddress;
1386	if (off < pSH->Misc.VirtualSize)
1387	{
1388	cbRead = RT_MIN(pSH->Misc.VirtualSize - off, cb);
1389	rc = pReader->pfnRead(pReader, pvBuf, cbRead, pSH->PointerToRawData + off);
1390	if ( cbRead == cb
1391	\|\| RT_FAILURE(rc))
1392	return rc;
1393	cb -= cbRead;
1394	RVA += cbRead;
1395	pvBuf = (uint8_t *)pvBuf + cbRead;
1396	}
1397	uint32_t RVANext = cLeft ? pSH[1].VirtualAddress : pModPe->cbImage;
1398	if (RVA < RVANext)
1399	{
1400	cbRead = RT_MIN(RVANext - RVA, cb);
1401	memset(pvBuf, 0, cbRead);
1402	if (cbRead == cb)
1403	return VINF_SUCCESS;
1404	cb -= cbRead;
1405	RVA += cbRead;
1406	pvBuf = (uint8_t *)pvBuf + cbRead;
1407	}
1408	}
1409
1410	AssertFailed();
1411	return VERR_INTERNAL_ERROR;
1412	}
1413
1414
1415	/**
1416	* Validates the data of some selected data directories entries.
1417	*
1418	* This requires a valid section table and thus has to wait
1419	* till after we've read and validated it.
1420	*
1421	* @returns iprt status code.
1422	* @param pModPe The PE module instance.
1423	* @param pOptHdr Pointer to the optional header (valid).
1424	*/
1425	int rtldrPEValidateDirectories(PRTLDRMODPE pModPe, const IMAGE_OPTIONAL_HEADER64 *pOptHdr)
1426	{
1427	const char *pszLogName = pModPe->pReader->pfnLogName(pModPe->pReader); NOREF(pszLogName);
1428	union /* combine stuff we're reading to help reduce stack usage. */
1429	{
1430	IMAGE_LOAD_CONFIG_DIRECTORY64 Cfg64;
1431	} u;
1432
1433	/*
1434	* The load config entry may include lock prefix tables and whatnot which we don't implement.
1435	* It does also include a lot of stuff which we can ignore, so we'll have to inspect the
1436	* actual data before we can make up our mind about it all.
1437	*/
1438	IMAGE_DATA_DIRECTORY Dir = pOptHdr->DataDirectory[IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG];
1439	if (Dir.Size)
1440	{
1441	const size_t cbExpect = pOptHdr->Magic == IMAGE_NT_OPTIONAL_HDR32_MAGIC
1442	? sizeof(IMAGE_LOAD_CONFIG_DIRECTORY32)
1443	: sizeof(IMAGE_LOAD_CONFIG_DIRECTORY64);
1444	if ( Dir.Size != cbExpect
1445	&& ( cbExpect == sizeof(IMAGE_LOAD_CONFIG_DIRECTORY32)
1446	&& Dir.Size != (uint32_t)RT_OFFSETOF(IMAGE_LOAD_CONFIG_DIRECTORY32, SEHandlerTable))
1447	)
1448	{
1449	Log(("rtldrPEOpen: %s: load cfg dir: unexpected dir size of %d bytes, expected %d.\n",
1450	pszLogName, Dir.Size, cbExpect));
1451	return VERR_LDRPE_LOAD_CONFIG_SIZE;
1452	}
1453
1454	/*
1455	* Read and convert to 64-bit.
1456	*/
1457	memset(&u.Cfg64, 0, sizeof(u.Cfg64));
1458	int rc = rtldrPEReadRVA(pModPe, &u.Cfg64, Dir.Size, Dir.VirtualAddress);
1459	if (RT_FAILURE(rc))
1460	return rc;
1461	rtldrPEConvert32BitLoadConfigTo64Bit(&u.Cfg64);
1462
1463	if (u.Cfg64.Size != cbExpect)
1464	{
1465	Log(("rtldrPEOpen: %s: load cfg dir: unexpected header size of %d bytes, expected %d.\n",
1466	pszLogName, u.Cfg64.Size, cbExpect));
1467	return VERR_LDRPE_LOAD_CONFIG_SIZE;
1468	}
1469	if (u.Cfg64.LockPrefixTable)
1470	{
1471	Log(("rtldrPEOpen: %s: load cfg dir: lock prefix table at %RX64. We don't support lock prefix tables!\n",
1472	pszLogName, u.Cfg64.LockPrefixTable));
1473	return VERR_LDRPE_LOCK_PREFIX_TABLE;
1474	}
1475	#if 0/* this seems to be safe to ignore. */
1476	if ( u.Cfg64.SEHandlerTable
1477	\|\| u.Cfg64.SEHandlerCount)
1478	{
1479	Log(("rtldrPEOpen: %s: load cfg dir: SEHandlerTable=%RX64 and SEHandlerCount=%RX64 are unsupported!\n",
1480	pszLogName, u.Cfg64.SEHandlerTable, u.Cfg64.SEHandlerCount));
1481	return VERR_BAD_EXE_FORMAT;
1482	}
1483	#endif
1484	if (u.Cfg64.EditList)
1485	{
1486	Log(("rtldrPEOpen: %s: load cfg dir: EditList=%RX64 is unsupported!\n",
1487	pszLogName, u.Cfg64.EditList));
1488	return VERR_BAD_EXE_FORMAT;
1489	}
1490	}
1491
1492	/*
1493	* If the image is signed, take a look at the signature.
1494	*/
1495	Dir = pOptHdr->DataDirectory[IMAGE_DIRECTORY_ENTRY_SECURITY];
1496	if (Dir.Size)
1497	{
1498	PWIN_CERTIFICATE pFirst = (PWIN_CERTIFICATE)RTMemTmpAlloc(Dir.Size);
1499	if (!pFirst)
1500	return VERR_NO_TMP_MEMORY;
1501	int rc = pModPe->pReader->pfnRead(pModPe->pReader, pFirst, Dir.Size, Dir.VirtualAddress);
1502	if (RT_SUCCESS(rc))
1503	{
1504	uint32_t off = 0;
1505	PWIN_CERTIFICATE pCur = pFirst;
1506	do
1507	{
1508	/* validate the members. */
1509	uint32_t const cbCur = RT_ALIGN_32(pCur->dwLength, 8);
1510	if ( cbCur < sizeof(WIN_CERTIFICATE)
1511	\|\| cbCur + off > RT_ALIGN_32(Dir.Size, 8))
1512	{
1513	Log(("rtldrPEOpen: %s: cert at %#x/%#x: dwLength=%#x\n", pszLogName, off, Dir.Size, pCur->dwLength));
1514	rc = VERR_LDRPE_CERT_MALFORMED;
1515	break;
1516	}
1517	if ( pCur->wRevision != WIN_CERT_REVISION_2_0
1518	&& pCur->wRevision != WIN_CERT_REVISION_1_0)
1519	{
1520	Log(("rtldrPEOpen: %s: cert at %#x/%#x: wRevision=%#x\n", pszLogName, off, Dir.Size, pCur->wRevision));
1521	rc = pCur->wRevision >= WIN_CERT_REVISION_1_0 ? VERR_LDRPE_CERT_UNSUPPORTED : VERR_LDRPE_CERT_MALFORMED;
1522	break;
1523	}
1524	if ( pCur->wCertificateType != WIN_CERT_TYPE_PKCS_SIGNED_DATA
1525	&& pCur->wCertificateType != WIN_CERT_TYPE_X509
1526	/&& pCur->wCertificateType != WIN_CERT_TYPE_RESERVED_1/
1527	/&& pCur->wCertificateType != WIN_CERT_TYPE_TS_STACK_SIGNED/
1528	&& pCur->wCertificateType != WIN_CERT_TYPE_EFI_PKCS115
1529	&& pCur->wCertificateType != WIN_CERT_TYPE_EFI_GUID
1530	)
1531	{
1532	Log(("rtldrPEOpen: %s: cert at %#x/%#x: wRevision=%#x\n", pszLogName, off, Dir.Size, pCur->wRevision));
1533	rc = pCur->wCertificateType ? VERR_LDRPE_CERT_UNSUPPORTED : VERR_LDRPE_CERT_MALFORMED;
1534	break;
1535	}
1536
1537	/** @todo Rainy Day: Implement further verification using openssl. */
1538
1539	/* next */
1540	off += cbCur;
1541	pCur = (PWIN_CERTIFICATE)((uint8_t *)pCur + cbCur);
1542	} while (off < Dir.Size);
1543	}
1544	RTMemTmpFree(pFirst);
1545	if (RT_FAILURE(rc))
1546	return rc;
1547	}
1548
1549
1550	return VINF_SUCCESS;
1551	}
1552
1553
1554	/**
1555	* Open a PE image.
1556	*
1557	* @returns iprt status code.
1558	* @param pReader The loader reader instance which will provide the raw image bits.
1559	* @param fFlags Reserved, MBZ.
1560	* @param enmArch Architecture specifier.
1561	* @param offNtHdrs The offset of the NT headers (where you find "PE\0\0").
1562	* @param phLdrMod Where to store the handle.
1563	*/
1564	int rtldrPEOpen(PRTLDRREADER pReader, uint32_t fFlags, RTLDRARCH enmArch, RTFOFF offNtHdrs, PRTLDRMOD phLdrMod)
1565	{
1566	AssertReturn(!fFlags, VERR_INVALID_PARAMETER);
1567
1568	/*
1569	* Read and validate the file header.
1570	*/
1571	IMAGE_FILE_HEADER FileHdr;
1572	int rc = pReader->pfnRead(pReader, &FileHdr, sizeof(FileHdr), offNtHdrs + 4);
1573	if (RT_FAILURE(rc))
1574	return rc;
1575	RTLDRARCH enmArchImage;
1576	const char *pszLogName = pReader->pfnLogName(pReader);
1577	rc = rtldrPEValidateFileHeader(&FileHdr, pszLogName, &enmArchImage);
1578	if (RT_FAILURE(rc))
1579	return rc;
1580
1581	/*
1582	* Match the CPU architecture.
1583	*/
1584	if ( enmArch != RTLDRARCH_WHATEVER
1585	&& enmArch != enmArchImage)
1586	return VERR_LDR_ARCH_MISMATCH;
1587
1588	/*
1589	* Read and validate the "optional" header. Convert 32->64 if necessary.
1590	*/
1591	IMAGE_OPTIONAL_HEADER64 OptHdr;
1592	rc = pReader->pfnRead(pReader, &OptHdr, FileHdr.SizeOfOptionalHeader, offNtHdrs + 4 + sizeof(IMAGE_FILE_HEADER));
1593	if (RT_FAILURE(rc))
1594	return rc;
1595	if (FileHdr.SizeOfOptionalHeader != sizeof(OptHdr))
1596	rtldrPEConvert32BitOptionalHeaderTo64Bit(&OptHdr);
1597	rc = rtldrPEValidateOptionalHeader(&OptHdr, pszLogName, offNtHdrs, &FileHdr, pReader->pfnSize(pReader));
1598	if (RT_FAILURE(rc))
1599	return rc;
1600
1601	/*
1602	* Read and validate section headers.
1603	*/
1604	const size_t cbSections = sizeof(IMAGE_SECTION_HEADER) * FileHdr.NumberOfSections;
1605	PIMAGE_SECTION_HEADER paSections = (PIMAGE_SECTION_HEADER)RTMemAlloc(cbSections);
1606	if (!paSections)
1607	return VERR_NO_MEMORY;
1608	rc = pReader->pfnRead(pReader, paSections, cbSections, offNtHdrs + 4 + sizeof(IMAGE_FILE_HEADER) + FileHdr.SizeOfOptionalHeader);
1609	if (RT_SUCCESS(rc))
1610	{
1611	rc = rtldrPEValidateSectionHeaders(paSections, FileHdr.NumberOfSections, pszLogName,
1612	&OptHdr, pReader->pfnSize(pReader));
1613	if (RT_SUCCESS(rc))
1614	{
1615	/*
1616	* Allocate and initialize the PE module structure.
1617	*/
1618	PRTLDRMODPE pModPe = (PRTLDRMODPE)RTMemAllocZ(sizeof(*pModPe));
1619	if (pModPe)
1620	{
1621	pModPe->Core.u32Magic = RTLDRMOD_MAGIC;
1622	pModPe->Core.eState = LDR_STATE_OPENED;
1623	if (FileHdr.SizeOfOptionalHeader == sizeof(OptHdr))
1624	pModPe->Core.pOps = &s_rtldrPE64Ops.Core;
1625	else
1626	pModPe->Core.pOps = &s_rtldrPE32Ops.Core;
1627	pModPe->pReader = pReader;
1628	pModPe->pvBits = NULL;
1629	pModPe->offNtHdrs = offNtHdrs;
1630	pModPe->u16Machine = FileHdr.Machine;
1631	pModPe->fFile = FileHdr.Characteristics;
1632	pModPe->cSections = FileHdr.NumberOfSections;
1633	pModPe->paSections = paSections;
1634	pModPe->uEntryPointRVA= OptHdr.AddressOfEntryPoint;
1635	pModPe->uImageBase = (RTUINTPTR)OptHdr.ImageBase;
1636	pModPe->cbImage = OptHdr.SizeOfImage;
1637	pModPe->cbHeaders = OptHdr.SizeOfHeaders;
1638	pModPe->ImportDir = OptHdr.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT];
1639	pModPe->RelocDir = OptHdr.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
1640	pModPe->ExportDir = OptHdr.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT];
1641
1642	/*
1643	* Perform validation of some selected data directories which requires
1644	* inspection of the actual data.
1645	*/
1646	rc = rtldrPEValidateDirectories(pModPe, &OptHdr);
1647	if (RT_SUCCESS(rc))
1648	{
1649	*phLdrMod = &pModPe->Core;
1650	return VINF_SUCCESS;
1651	}
1652	RTMemFree(pModPe);
1653	}
1654	else
1655	rc = VERR_NO_MEMORY;
1656	}
1657	}
1658	RTMemFree(paSections);
1659	return rc;
1660	}
1661

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source: vbox/trunk/src/VBox/Runtime/common/ldr/ldrPE.cpp@ 43172

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