ldrELFRelocatable.cpp.h@ 74762

Last change on this file since 74762 was 73531, checked in by vboxsync, 6 years ago
IPRT: Some work on stack unwinding using dwarf info. bugref:3897
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1	/* $Id: ldrELFRelocatable.cpp.h 73531 2018-08-06 17:08:57Z vboxsync $ */
2	/** @file
3	* IPRT - Binary Image Loader, Template for ELF Relocatable Images.
4	*/
5
6	/*
7	* Copyright (C) 2006-2017 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	* Defined Constants And Macros *
30	*******************************************************************************/
31	#if ELF_MODE == 32
32	#define RTLDRELF_NAME(name) rtldrELF32##name
33	#define RTLDRELF_SUFF(name) name##32
34	#define RTLDRELF_MID(pre,suff) pre##32##suff
35	#define FMT_ELF_ADDR "%08RX32"
36	#define FMT_ELF_HALF "%04RX16"
37	#define FMT_ELF_OFF "%08RX32"
38	#define FMT_ELF_SIZE "%08RX32"
39	#define FMT_ELF_SWORD "%RI32"
40	#define FMT_ELF_WORD "%08RX32"
41	#define FMT_ELF_XWORD "%08RX32"
42	#define FMT_ELF_SXWORD "%RI32"
43
44	#elif ELF_MODE == 64
45	#define RTLDRELF_NAME(name) rtldrELF64##name
46	#define RTLDRELF_SUFF(name) name##64
47	#define RTLDRELF_MID(pre,suff) pre##64##suff
48	#define FMT_ELF_ADDR "%016RX64"
49	#define FMT_ELF_HALF "%04RX16"
50	#define FMT_ELF_SHALF "%RI16"
51	#define FMT_ELF_OFF "%016RX64"
52	#define FMT_ELF_SIZE "%016RX64"
53	#define FMT_ELF_SWORD "%RI32"
54	#define FMT_ELF_WORD "%08RX32"
55	#define FMT_ELF_XWORD "%016RX64"
56	#define FMT_ELF_SXWORD "%RI64"
57	#endif
58
59	#define Elf_Ehdr RTLDRELF_MID(Elf,_Ehdr)
60	#define Elf_Phdr RTLDRELF_MID(Elf,_Phdr)
61	#define Elf_Shdr RTLDRELF_MID(Elf,_Shdr)
62	#define Elf_Sym RTLDRELF_MID(Elf,_Sym)
63	#define Elf_Rel RTLDRELF_MID(Elf,_Rel)
64	#define Elf_Rela RTLDRELF_MID(Elf,_Rela)
65	#define Elf_Nhdr RTLDRELF_MID(Elf,_Nhdr)
66	#define Elf_Dyn RTLDRELF_MID(Elf,_Dyn)
67	#define Elf_Addr RTLDRELF_MID(Elf,_Addr)
68	#define Elf_Half RTLDRELF_MID(Elf,_Half)
69	#define Elf_Off RTLDRELF_MID(Elf,_Off)
70	#define Elf_Size RTLDRELF_MID(Elf,_Size)
71	#define Elf_Sword RTLDRELF_MID(Elf,_Sword)
72	#define Elf_Word RTLDRELF_MID(Elf,_Word)
73
74	#define RTLDRMODELF RTLDRELF_MID(RTLDRMODELF,RT_NOTHING)
75	#define PRTLDRMODELF RTLDRELF_MID(PRTLDRMODELF,RT_NOTHING)
76
77	#define ELF_R_SYM(info) RTLDRELF_MID(ELF,_R_SYM)(info)
78	#define ELF_R_TYPE(info) RTLDRELF_MID(ELF,_R_TYPE)(info)
79	#define ELF_R_INFO(sym, type) RTLDRELF_MID(ELF,_R_INFO)(sym, type)
80
81	#define ELF_ST_BIND(info) RTLDRELF_MID(ELF,_ST_BIND)(info)
82
83
84
85	/*******************************************************************************
86	* Structures and Typedefs *
87	*******************************************************************************/
88	/**
89	* The ELF loader structure.
90	*/
91	typedef struct RTLDRMODELF
92	{
93	/** Core module structure. */
94	RTLDRMODINTERNAL Core;
95	/** Pointer to readonly mapping of the image bits.
96	* This mapping is provided by the pReader. */
97	const void *pvBits;
98
99	/** The ELF header. */
100	Elf_Ehdr Ehdr;
101	/** Pointer to our copy of the section headers with sh_addr as RVAs.
102	* The virtual addresses in this array is the 0 based assignments we've given the image.
103	* Not valid if the image is DONE. */
104	Elf_Shdr *paShdrs;
105	/** Unmodified section headers (allocated after paShdrs, so no need to free).
106	* Not valid if the image is DONE. */
107	Elf_Shdr const *paOrgShdrs;
108	/** The size of the loaded image. */
109	size_t cbImage;
110
111	/** The image base address if it's an EXEC or DYN image. */
112	Elf_Addr LinkAddress;
113
114	/** The symbol section index. */
115	unsigned iSymSh;
116	/** Number of symbols in the table. */
117	unsigned cSyms;
118	/** Pointer to symbol table within RTLDRMODELF::pvBits. */
119	const Elf_Sym *paSyms;
120
121	/** The string section index. */
122	unsigned iStrSh;
123	/** Size of the string table. */
124	unsigned cbStr;
125	/** Pointer to string table within RTLDRMODELF::pvBits. */
126	const char *pStr;
127
128	/** Size of the section header string table. */
129	unsigned cbShStr;
130	/** Pointer to section header string table within RTLDRMODELF::pvBits. */
131	const char *pShStr;
132
133	/** The '.eh_frame' section index. Zero if not searched for, ~0U if not found. */
134	unsigned iShEhFrame;
135	/** The '.eh_frame_hdr' section index. Zero if not searched for, ~0U if not found. */
136	unsigned iShEhFrameHdr;
137	} RTLDRMODELF, *PRTLDRMODELF;
138
139
140	/**
141	* Maps the image bits into memory and resolve pointers into it.
142	*
143	* @returns iprt status code.
144	* @param pModElf The ELF loader module instance data.
145	* @param fNeedsBits Set if we actually need the pvBits member.
146	* If we don't, we can simply read the string and symbol sections, thus saving memory.
147	*/
148	static int RTLDRELF_NAME(MapBits)(PRTLDRMODELF pModElf, bool fNeedsBits)
149	{
150	NOREF(fNeedsBits);
151	if (pModElf->pvBits)
152	return VINF_SUCCESS;
153	int rc = pModElf->Core.pReader->pfnMap(pModElf->Core.pReader, &pModElf->pvBits);
154	if (RT_SUCCESS(rc))
155	{
156	const uint8_t pu8 = (const uint8_t )pModElf->pvBits;
157	if (pModElf->iSymSh != ~0U)
158	pModElf->paSyms = (const Elf_Sym *)(pu8 + pModElf->paShdrs[pModElf->iSymSh].sh_offset);
159	if (pModElf->iStrSh != ~0U)
160	pModElf->pStr = (const char *)(pu8 + pModElf->paShdrs[pModElf->iStrSh].sh_offset);
161	pModElf->pShStr = (const char *)(pu8 + pModElf->paShdrs[pModElf->Ehdr.e_shstrndx].sh_offset);
162	}
163	return rc;
164	}
165
166
167	/*
168	*
169	* EXEC & DYN.
170	* EXEC & DYN.
171	* EXEC & DYN.
172	* EXEC & DYN.
173	* EXEC & DYN.
174	*
175	*/
176
177
178	/**
179	* Applies the fixups for a section in an executable image.
180	*
181	* @returns iprt status code.
182	* @param pModElf The ELF loader module instance data.
183	* @param BaseAddr The base address which the module is being fixedup to.
184	* @param pfnGetImport The callback function to use to resolve imports (aka unresolved externals).
185	* @param pvUser User argument to pass to the callback.
186	* @param SecAddr The section address. This is the address the relocations are relative to.
187	* @param cbSec The section size. The relocations must be inside this.
188	* @param pu8SecBaseR Where we read section bits from.
189	* @param pu8SecBaseW Where we write section bits to.
190	* @param pvRelocs Pointer to where we read the relocations from.
191	* @param cbRelocs Size of the relocations.
192	*/
193	static int RTLDRELF_NAME(RelocateSectionExecDyn)(PRTLDRMODELF pModElf, Elf_Addr BaseAddr,
194	PFNRTLDRIMPORT pfnGetImport, void *pvUser,
195	const Elf_Addr SecAddr, Elf_Size cbSec,
196	const uint8_t pu8SecBaseR, uint8_t pu8SecBaseW,
197	const void *pvRelocs, Elf_Size cbRelocs)
198	{
199	#if ELF_MODE != 32
200	NOREF(pu8SecBaseR);
201	#endif
202
203	/*
204	* Iterate the relocations.
205	* The relocations are stored in an array of Elf32_Rel records and covers the entire relocation section.
206	*/
207	const Elf_Addr offDelta = BaseAddr - pModElf->LinkAddress;
208	const Elf_Reloc paRels = (const Elf_Reloc )pvRelocs;
209	const unsigned iRelMax = (unsigned)(cbRelocs / sizeof(paRels[0]));
210	AssertMsgReturn(iRelMax == cbRelocs / sizeof(paRels[0]), (FMT_ELF_SIZE "\n", cbRelocs / sizeof(paRels[0])),
211	VERR_IMAGE_TOO_BIG);
212	for (unsigned iRel = 0; iRel < iRelMax; iRel++)
213	{
214	/*
215	* Skip R_XXX_NONE entries early to avoid confusion in the symbol
216	* getter code.
217	*/
218	#if ELF_MODE == 32
219	if (ELF_R_TYPE(paRels[iRel].r_info) == R_386_NONE)
220	continue;
221	#elif ELF_MODE == 64
222	if (ELF_R_TYPE(paRels[iRel].r_info) == R_X86_64_NONE)
223	continue;
224	#endif
225
226	/*
227	* Validate and find the symbol, resolve undefined ones.
228	*/
229	Elf_Size iSym = ELF_R_SYM(paRels[iRel].r_info);
230	if (iSym >= pModElf->cSyms)
231	{
232	AssertMsgFailed(("iSym=%d is an invalid symbol index!\n", iSym));
233	return VERR_LDRELF_INVALID_SYMBOL_INDEX;
234	}
235	const Elf_Sym *pSym = &pModElf->paSyms[iSym];
236	if (pSym->st_name >= pModElf->cbStr)
237	{
238	AssertMsgFailed(("iSym=%d st_name=%d str sh_size=%d\n", iSym, pSym->st_name, pModElf->cbStr));
239	return VERR_LDRELF_INVALID_SYMBOL_NAME_OFFSET;
240	}
241
242	Elf_Addr SymValue = 0;
243	if (pSym->st_shndx == SHN_UNDEF)
244	{
245	/* Try to resolve the symbol. */
246	const char *pszName = ELF_STR(pModElf, pSym->st_name);
247	RTUINTPTR ExtValue;
248	int rc = pfnGetImport(&pModElf->Core, "", pszName, ~0U, &ExtValue, pvUser);
249	AssertMsgRCReturn(rc, ("Failed to resolve '%s' rc=%Rrc\n", pszName, rc), rc);
250	SymValue = (Elf_Addr)ExtValue;
251	AssertMsgReturn((RTUINTPTR)SymValue == ExtValue, ("Symbol value overflowed! '%s'\n", pszName),
252	VERR_SYMBOL_VALUE_TOO_BIG);
253	Log2(("rtldrELF: #%-3d - UNDEF " FMT_ELF_ADDR " '%s'\n", iSym, SymValue, pszName));
254	}
255	else
256	{
257	AssertMsgReturn(pSym->st_shndx < pModElf->Ehdr.e_shnum \|\| pSym->st_shndx == SHN_ABS, ("%#x\n", pSym->st_shndx),
258	VERR_LDRELF_INVALID_RELOCATION_OFFSET);
259	#if ELF_MODE == 64
260	SymValue = pSym->st_value;
261	#endif
262	}
263
264	#if ELF_MODE == 64
265	/* Calc the value (indexes checked above; assumes SHN_UNDEF == 0). */
266	Elf_Addr Value;
267	if (pSym->st_shndx < pModElf->Ehdr.e_shnum)
268	Value = SymValue + offDelta;
269	else /* SHN_ABS: */
270	Value = SymValue + paRels[iRel].r_addend;
271	#endif
272
273	/*
274	* Apply the fixup.
275	*/
276	AssertMsgReturn(paRels[iRel].r_offset < cbSec, (FMT_ELF_ADDR " " FMT_ELF_SIZE "\n", paRels[iRel].r_offset, cbSec), VERR_LDRELF_INVALID_RELOCATION_OFFSET);
277	#if ELF_MODE == 32
278	const Elf_Addr pAddrR = (const Elf_Addr )(pu8SecBaseR + paRels[iRel].r_offset); /* Where to read the addend. */
279	#endif
280	Elf_Addr pAddrW = (Elf_Addr )(pu8SecBaseW + paRels[iRel].r_offset); /* Where to write the fixup. */
281	switch (ELF_R_TYPE(paRels[iRel].r_info))
282	{
283	#if ELF_MODE == 32
284	/*
285	* Absolute addressing.
286	*/
287	case R_386_32:
288	{
289	Elf_Addr Value;
290	if (pSym->st_shndx < pModElf->Ehdr.e_shnum)
291	Value = pAddrR + offDelta; / Simplified. */
292	else if (pSym->st_shndx == SHN_ABS)
293	continue; /* Internal fixup, no need to apply it. */
294	else if (pSym->st_shndx == SHN_UNDEF)
295	Value = SymValue + *pAddrR;
296	else
297	AssertFailedReturn(VERR_LDR_GENERAL_FAILURE); /** @todo SHN_COMMON */
298	(uint32_t )pAddrW = Value;
299	Log4((FMT_ELF_ADDR": R_386_32 Value=" FMT_ELF_ADDR "\n", SecAddr + paRels[iRel].r_offset + BaseAddr, Value));
300	break;
301	}
302
303	/*
304	* PC relative addressing.
305	*/
306	case R_386_PC32:
307	{
308	Elf_Addr Value;
309	if (pSym->st_shndx < pModElf->Ehdr.e_shnum)
310	continue; /* Internal fixup, no need to apply it. */
311	else if (pSym->st_shndx == SHN_ABS)
312	Value = pAddrR + offDelta; / Simplified. */
313	else if (pSym->st_shndx == SHN_UNDEF)
314	{
315	const Elf_Addr SourceAddr = SecAddr + paRels[iRel].r_offset + BaseAddr; /* Where the source really is. */
316	Value = SymValue + (uint32_t )pAddrR - SourceAddr;
317	(uint32_t )pAddrW = Value;
318	}
319	else
320	AssertFailedReturn(VERR_LDR_GENERAL_FAILURE); /** @todo SHN_COMMON */
321	Log4((FMT_ELF_ADDR": R_386_PC32 Value=" FMT_ELF_ADDR "\n", SecAddr + paRels[iRel].r_offset + BaseAddr, Value));
322	break;
323	}
324
325	#elif ELF_MODE == 64
326
327	/*
328	* Absolute addressing
329	*/
330	case R_X86_64_64:
331	{
332	(uint64_t )pAddrW = Value;
333	Log4((FMT_ELF_ADDR": R_X86_64_64 Value=" FMT_ELF_ADDR " SymValue=" FMT_ELF_ADDR "\n",
334	SecAddr + paRels[iRel].r_offset + BaseAddr, Value, SymValue));
335	break;
336	}
337
338	/*
339	* Truncated 32-bit value (zero-extendedable to the 64-bit value).
340	*/
341	case R_X86_64_32:
342	{
343	(uint32_t )pAddrW = (uint32_t)Value;
344	Log4((FMT_ELF_ADDR": R_X86_64_32 Value=" FMT_ELF_ADDR " SymValue=" FMT_ELF_ADDR "\n",
345	SecAddr + paRels[iRel].r_offset + BaseAddr, Value, SymValue));
346	AssertMsgReturn((Elf_Addr)(uint32_t )pAddrW == SymValue, ("Value=" FMT_ELF_ADDR "\n", SymValue),
347	VERR_SYMBOL_VALUE_TOO_BIG);
348	break;
349	}
350
351	/*
352	* Truncated 32-bit value (sign-extendedable to the 64-bit value).
353	*/
354	case R_X86_64_32S:
355	{
356	(int32_t )pAddrW = (int32_t)Value;
357	Log4((FMT_ELF_ADDR": R_X86_64_32S Value=" FMT_ELF_ADDR " SymValue=" FMT_ELF_ADDR "\n",
358	SecAddr + paRels[iRel].r_offset + BaseAddr, Value, SymValue));
359	AssertMsgReturn((Elf_Addr)(int32_t )pAddrW == Value, ("Value=" FMT_ELF_ADDR "\n", Value), VERR_SYMBOL_VALUE_TOO_BIG); /** @todo check the sign-extending here. */
360	break;
361	}
362
363	/*
364	* PC relative addressing.
365	*/
366	case R_X86_64_PC32:
367	case R_X86_64_PLT32: /* binutils commit 451875b4f976a527395e9303224c7881b65e12ed feature/regression. */
368	{
369	const Elf_Addr SourceAddr = SecAddr + paRels[iRel].r_offset + BaseAddr; /* Where the source really is. */
370	Value -= SourceAddr;
371	(int32_t )pAddrW = (int32_t)Value;
372	Log4((FMT_ELF_ADDR": R_X86_64_PC32 Value=" FMT_ELF_ADDR " SymValue=" FMT_ELF_ADDR "\n",
373	SourceAddr, Value, SymValue));
374	AssertMsgReturn((Elf_Addr)(int32_t )pAddrW == Value, ("Value=" FMT_ELF_ADDR "\n", Value), VERR_SYMBOL_VALUE_TOO_BIG); /** @todo check the sign-extending here. */
375	break;
376	}
377	#endif
378
379	default:
380	AssertMsgFailed(("Unknown relocation type: %d (iRel=%d iRelMax=%d)\n",
381	ELF_R_TYPE(paRels[iRel].r_info), iRel, iRelMax));
382	return VERR_LDRELF_RELOCATION_NOT_SUPPORTED;
383	}
384	}
385
386	return VINF_SUCCESS;
387	}
388
389
390
391	/*
392	*
393	* REL
394	* REL
395	* REL
396	* REL
397	* REL
398	*
399	*/
400
401	/**
402	* Get the symbol and symbol value.
403	*
404	* @returns iprt status code.
405	* @param pModElf The ELF loader module instance data.
406	* @param BaseAddr The base address which the module is being fixedup to.
407	* @param pfnGetImport The callback function to use to resolve imports (aka unresolved externals).
408	* @param pvUser User argument to pass to the callback.
409	* @param iSym The symbol to get.
410	* @param ppSym Where to store the symbol pointer on success. (read only)
411	* @param pSymValue Where to store the symbol value on success.
412	*/
413	static int RTLDRELF_NAME(Symbol)(PRTLDRMODELF pModElf, Elf_Addr BaseAddr, PFNRTLDRIMPORT pfnGetImport, void *pvUser,
414	Elf_Size iSym, const Elf_Sym *ppSym, Elf_Addr pSymValue)
415	{
416	/*
417	* Validate and find the symbol.
418	*/
419	if (iSym >= pModElf->cSyms)
420	{
421	AssertMsgFailed(("iSym=%d is an invalid symbol index!\n", iSym));
422	return VERR_LDRELF_INVALID_SYMBOL_INDEX;
423	}
424	const Elf_Sym *pSym = &pModElf->paSyms[iSym];
425	*ppSym = pSym;
426
427	if (pSym->st_name >= pModElf->cbStr)
428	{
429	AssertMsgFailed(("iSym=%d st_name=%d str sh_size=%d\n", iSym, pSym->st_name, pModElf->cbStr));
430	return VERR_LDRELF_INVALID_SYMBOL_NAME_OFFSET;
431	}
432	const char *pszName = ELF_STR(pModElf, pSym->st_name);
433
434	/*
435	* Determine the symbol value.
436	*
437	* Symbols needs different treatment depending on which section their are in.
438	* Undefined and absolute symbols goes into special non-existing sections.
439	*/
440	switch (pSym->st_shndx)
441	{
442	/*
443	* Undefined symbol, needs resolving.
444	*
445	* Since ELF has no generic concept of importing from specific module (the OS/2 ELF format
446	* has but that's a OS extension and only applies to programs and dlls), we'll have to ask
447	* the resolver callback to do a global search.
448	*/
449	case SHN_UNDEF:
450	{
451	/* Try to resolve the symbol. */
452	RTUINTPTR Value;
453	int rc = pfnGetImport(&pModElf->Core, "", pszName, ~0U, &Value, pvUser);
454	if (RT_FAILURE(rc))
455	{
456	AssertMsgFailed(("Failed to resolve '%s' rc=%Rrc\n", pszName, rc));
457	return rc;
458	}
459	*pSymValue = (Elf_Addr)Value;
460	if ((RTUINTPTR)*pSymValue != Value)
461	{
462	AssertMsgFailed(("Symbol value overflowed! '%s'\n", pszName));
463	return VERR_SYMBOL_VALUE_TOO_BIG;
464	}
465
466	Log2(("rtldrELF: #%-3d - UNDEF " FMT_ELF_ADDR " '%s'\n", iSym, *pSymValue, pszName));
467	break;
468	}
469
470	/*
471	* Absolute symbols needs no fixing since they are, well, absolute.
472	*/
473	case SHN_ABS:
474	*pSymValue = pSym->st_value;
475	Log2(("rtldrELF: #%-3d - ABS " FMT_ELF_ADDR " '%s'\n", iSym, *pSymValue, pszName));
476	break;
477
478	/*
479	* All other symbols are addressed relative to their section and need to be fixed up.
480	*/
481	default:
482	if (pSym->st_shndx >= pModElf->Ehdr.e_shnum)
483	{
484	/* what about common symbols? */
485	AssertMsg(pSym->st_shndx < pModElf->Ehdr.e_shnum,
486	("iSym=%d st_shndx=%d e_shnum=%d pszName=%s\n", iSym, pSym->st_shndx, pModElf->Ehdr.e_shnum, pszName));
487	return VERR_BAD_EXE_FORMAT;
488	}
489	*pSymValue = pSym->st_value + pModElf->paShdrs[pSym->st_shndx].sh_addr + BaseAddr;
490	Log2(("rtldrELF: #%-3d - %5d " FMT_ELF_ADDR " '%s'\n", iSym, pSym->st_shndx, *pSymValue, pszName));
491	break;
492	}
493
494	return VINF_SUCCESS;
495	}
496
497
498	/**
499	* Applies the fixups for a sections.
500	*
501	* @returns iprt status code.
502	* @param pModElf The ELF loader module instance data.
503	* @param BaseAddr The base address which the module is being fixedup to.
504	* @param pfnGetImport The callback function to use to resolve imports (aka unresolved externals).
505	* @param pvUser User argument to pass to the callback.
506	* @param SecAddr The section address. This is the address the relocations are relative to.
507	* @param cbSec The section size. The relocations must be inside this.
508	* @param pu8SecBaseR Where we read section bits from.
509	* @param pu8SecBaseW Where we write section bits to.
510	* @param pvRelocs Pointer to where we read the relocations from.
511	* @param cbRelocs Size of the relocations.
512	*/
513	static int RTLDRELF_NAME(RelocateSection)(PRTLDRMODELF pModElf, Elf_Addr BaseAddr, PFNRTLDRIMPORT pfnGetImport, void *pvUser,
514	const Elf_Addr SecAddr, Elf_Size cbSec, const uint8_t pu8SecBaseR, uint8_t pu8SecBaseW,
515	const void *pvRelocs, Elf_Size cbRelocs)
516	{
517	#if ELF_MODE != 32
518	NOREF(pu8SecBaseR);
519	#endif
520
521	/*
522	* Iterate the relocations.
523	* The relocations are stored in an array of Elf32_Rel records and covers the entire relocation section.
524	*/
525	const Elf_Reloc paRels = (const Elf_Reloc )pvRelocs;
526	const unsigned iRelMax = (unsigned)(cbRelocs / sizeof(paRels[0]));
527	AssertMsgReturn(iRelMax == cbRelocs / sizeof(paRels[0]), (FMT_ELF_SIZE "\n", cbRelocs / sizeof(paRels[0])), VERR_IMAGE_TOO_BIG);
528	for (unsigned iRel = 0; iRel < iRelMax; iRel++)
529	{
530	/*
531	* Skip R_XXX_NONE entries early to avoid confusion in the symbol
532	* getter code.
533	*/
534	#if ELF_MODE == 32
535	if (ELF_R_TYPE(paRels[iRel].r_info) == R_386_NONE)
536	continue;
537	#elif ELF_MODE == 64
538	if (ELF_R_TYPE(paRels[iRel].r_info) == R_X86_64_NONE)
539	continue;
540	#endif
541
542
543	/*
544	* Get the symbol.
545	*/
546	const Elf_Sym pSym = NULL; / shut up gcc */
547	Elf_Addr SymValue = 0; /* shut up gcc-4 */
548	int rc = RTLDRELF_NAME(Symbol)(pModElf, BaseAddr, pfnGetImport, pvUser, ELF_R_SYM(paRels[iRel].r_info), &pSym, &SymValue);
549	if (RT_FAILURE(rc))
550	return rc;
551
552	Log3(("rtldrELF: " FMT_ELF_ADDR " %02x %06x - " FMT_ELF_ADDR " %3d %02x %s\n",
553	paRels[iRel].r_offset, ELF_R_TYPE(paRels[iRel].r_info), (unsigned)ELF_R_SYM(paRels[iRel].r_info),
554	SymValue, (unsigned)pSym->st_shndx, pSym->st_info, ELF_STR(pModElf, pSym->st_name)));
555
556	/*
557	* Apply the fixup.
558	*/
559	AssertMsgReturn(paRels[iRel].r_offset < cbSec, (FMT_ELF_ADDR " " FMT_ELF_SIZE "\n", paRels[iRel].r_offset, cbSec), VERR_LDRELF_INVALID_RELOCATION_OFFSET);
560	#if ELF_MODE == 32
561	const Elf_Addr pAddrR = (const Elf_Addr )(pu8SecBaseR + paRels[iRel].r_offset); /* Where to read the addend. */
562	#endif
563	Elf_Addr pAddrW = (Elf_Addr )(pu8SecBaseW + paRels[iRel].r_offset); /* Where to write the fixup. */
564	switch (ELF_R_TYPE(paRels[iRel].r_info))
565	{
566	#if ELF_MODE == 32
567	/*
568	* Absolute addressing.
569	*/
570	case R_386_32:
571	{
572	const Elf_Addr Value = SymValue + *pAddrR;
573	(uint32_t )pAddrW = Value;
574	Log4((FMT_ELF_ADDR": R_386_32 Value=" FMT_ELF_ADDR " SymValue=" FMT_ELF_ADDR "\n",
575	SecAddr + paRels[iRel].r_offset + BaseAddr, Value, SymValue));
576	break;
577	}
578
579	/*
580	* PC relative addressing.
581	*/
582	case R_386_PC32:
583	{
584	const Elf_Addr SourceAddr = SecAddr + paRels[iRel].r_offset + BaseAddr; /* Where the source really is. */
585	const Elf_Addr Value = SymValue + (uint32_t )pAddrR - SourceAddr;
586	(uint32_t )pAddrW = Value;
587	Log4((FMT_ELF_ADDR": R_386_PC32 Value=" FMT_ELF_ADDR " SymValue=" FMT_ELF_ADDR "\n",
588	SourceAddr, Value, SymValue));
589	break;
590	}
591
592	/* ignore */
593	case R_386_NONE:
594	break;
595
596	#elif ELF_MODE == 64
597
598	/*
599	* Absolute addressing
600	*/
601	case R_X86_64_64:
602	{
603	const Elf_Addr Value = SymValue + paRels[iRel].r_addend;
604	(uint64_t )pAddrW = Value;
605	Log4((FMT_ELF_ADDR": R_X86_64_64 Value=" FMT_ELF_ADDR " SymValue=" FMT_ELF_ADDR "\n",
606	SecAddr + paRels[iRel].r_offset + BaseAddr, Value, SymValue));
607	break;
608	}
609
610	/*
611	* Truncated 32-bit value (zero-extendedable to the 64-bit value).
612	*/
613	case R_X86_64_32:
614	{
615	const Elf_Addr Value = SymValue + paRels[iRel].r_addend;
616	(uint32_t )pAddrW = (uint32_t)Value;
617	Log4((FMT_ELF_ADDR": R_X86_64_32 Value=" FMT_ELF_ADDR " SymValue=" FMT_ELF_ADDR "\n",
618	SecAddr + paRels[iRel].r_offset + BaseAddr, Value, SymValue));
619	AssertMsgReturn((Elf_Addr)(uint32_t )pAddrW == Value, ("Value=" FMT_ELF_ADDR "\n", Value), VERR_SYMBOL_VALUE_TOO_BIG);
620	break;
621	}
622
623	/*
624	* Truncated 32-bit value (sign-extendedable to the 64-bit value).
625	*/
626	case R_X86_64_32S:
627	{
628	const Elf_Addr Value = SymValue + paRels[iRel].r_addend;
629	(int32_t )pAddrW = (int32_t)Value;
630	Log4((FMT_ELF_ADDR": R_X86_64_32S Value=" FMT_ELF_ADDR " SymValue=" FMT_ELF_ADDR "\n",
631	SecAddr + paRels[iRel].r_offset + BaseAddr, Value, SymValue));
632	AssertMsgReturn((Elf_Addr)(int32_t )pAddrW == Value, ("Value=" FMT_ELF_ADDR "\n", Value), VERR_SYMBOL_VALUE_TOO_BIG); /** @todo check the sign-extending here. */
633	break;
634	}
635
636	/*
637	* PC relative addressing.
638	*/
639	case R_X86_64_PC32:
640	case R_X86_64_PLT32: /* binutils commit 451875b4f976a527395e9303224c7881b65e12ed feature/regression. */
641	{
642	const Elf_Addr SourceAddr = SecAddr + paRels[iRel].r_offset + BaseAddr; /* Where the source really is. */
643	const Elf_Addr Value = SymValue + paRels[iRel].r_addend - SourceAddr;
644	(int32_t )pAddrW = (int32_t)Value;
645	Log4((FMT_ELF_ADDR": R_X86_64_PC32 Value=" FMT_ELF_ADDR " SymValue=" FMT_ELF_ADDR "\n",
646	SourceAddr, Value, SymValue));
647	AssertMsgReturn((Elf_Addr)(int32_t )pAddrW == Value, ("Value=" FMT_ELF_ADDR "\n", Value), VERR_SYMBOL_VALUE_TOO_BIG); /** @todo check the sign-extending here. */
648	break;
649	}
650
651	/* ignore */
652	case R_X86_64_NONE:
653	break;
654	#endif
655
656	default:
657	AssertMsgFailed(("Unknown relocation type: %d (iRel=%d iRelMax=%d)\n",
658	ELF_R_TYPE(paRels[iRel].r_info), iRel, iRelMax));
659	return VERR_LDRELF_RELOCATION_NOT_SUPPORTED;
660	}
661	}
662
663	return VINF_SUCCESS;
664	}
665
666
667
668	/** @copydoc RTLDROPS::pfnClose */
669	static DECLCALLBACK(int) RTLDRELF_NAME(Close)(PRTLDRMODINTERNAL pMod)
670	{
671	PRTLDRMODELF pModElf = (PRTLDRMODELF)pMod;
672
673	if (pModElf->paShdrs)
674	{
675	RTMemFree(pModElf->paShdrs);
676	pModElf->paShdrs = NULL;
677	}
678
679	pModElf->pvBits = NULL;
680
681	return VINF_SUCCESS;
682	}
683
684
685	/** @copydoc RTLDROPS::Done */
686	static DECLCALLBACK(int) RTLDRELF_NAME(Done)(PRTLDRMODINTERNAL pMod)
687	{
688	NOREF(pMod); /PRTLDRMODELF pModElf = (PRTLDRMODELF)pMod;/
689	/** @todo Have to think more about this .... */
690	return -1;
691	}
692
693
694	/** @copydoc RTLDROPS::EnumSymbols */
695	static DECLCALLBACK(int) RTLDRELF_NAME(EnumSymbols)(PRTLDRMODINTERNAL pMod, unsigned fFlags, const void *pvBits, RTUINTPTR BaseAddress,
696	PFNRTLDRENUMSYMS pfnCallback, void *pvUser)
697	{
698	PRTLDRMODELF pModElf = (PRTLDRMODELF)pMod;
699	NOREF(pvBits);
700
701	/*
702	* Validate the input.
703	*/
704	Elf_Addr BaseAddr = (Elf_Addr)BaseAddress;
705	AssertMsgReturn((RTUINTPTR)BaseAddr == BaseAddress, ("%RTptr", BaseAddress), VERR_IMAGE_BASE_TOO_HIGH);
706
707	/*
708	* Make sure we've got the string and symbol tables. (We don't need the pvBits.)
709	*/
710	int rc = RTLDRELF_NAME(MapBits)(pModElf, false);
711	if (RT_FAILURE(rc))
712	return rc;
713
714	/*
715	* Enumerate the symbol table.
716	*/
717	const Elf_Sym *paSyms = pModElf->paSyms;
718	unsigned cSyms = pModElf->cSyms;
719	for (unsigned iSym = 1; iSym < cSyms; iSym++)
720	{
721	/*
722	* Skip imports (undefined).
723	*/
724	if (paSyms[iSym].st_shndx != SHN_UNDEF)
725	{
726	/*
727	* Calc value and get name.
728	*/
729	Elf_Addr Value;
730	if (paSyms[iSym].st_shndx == SHN_ABS)
731	/* absolute symbols are not subject to any relocation. */
732	Value = paSyms[iSym].st_value;
733	else if (paSyms[iSym].st_shndx < pModElf->Ehdr.e_shnum)
734	{
735	if (pModElf->Ehdr.e_type == ET_REL)
736	/* relative to the section. */
737	Value = BaseAddr + paSyms[iSym].st_value + pModElf->paShdrs[paSyms[iSym].st_shndx].sh_addr;
738	else /* Fixed up for link address. */
739	Value = BaseAddr + paSyms[iSym].st_value - pModElf->LinkAddress;
740	}
741	else
742	{
743	AssertMsgFailed(("Arg! paSyms[%u].st_shndx=" FMT_ELF_HALF "\n", iSym, paSyms[iSym].st_shndx));
744	return VERR_BAD_EXE_FORMAT;
745	}
746	const char *pszName = ELF_STR(pModElf, paSyms[iSym].st_name);
747	if ( (pszName && *pszName)
748	&& ( (fFlags & RTLDR_ENUM_SYMBOL_FLAGS_ALL)
749	\|\| ELF_ST_BIND(paSyms[iSym].st_info) == STB_GLOBAL)
750	)
751	{
752	/*
753	* Call back.
754	*/
755	AssertMsgReturn(Value == (RTUINTPTR)Value, (FMT_ELF_ADDR "\n", Value), VERR_SYMBOL_VALUE_TOO_BIG);
756	rc = pfnCallback(pMod, pszName, ~0U, (RTUINTPTR)Value, pvUser);
757	if (rc)
758	return rc;
759	}
760	}
761	}
762
763	return VINF_SUCCESS;
764	}
765
766
767	/** @copydoc RTLDROPS::GetImageSize */
768	static DECLCALLBACK(size_t) RTLDRELF_NAME(GetImageSize)(PRTLDRMODINTERNAL pMod)
769	{
770	PRTLDRMODELF pModElf = (PRTLDRMODELF)pMod;
771
772	return pModElf->cbImage;
773	}
774
775
776	/** @copydoc RTLDROPS::GetBits */
777	static DECLCALLBACK(int) RTLDRELF_NAME(GetBits)(PRTLDRMODINTERNAL pMod, void pvBits, RTUINTPTR BaseAddress, PFNRTLDRIMPORT pfnGetImport, void pvUser)
778	{
779	PRTLDRMODELF pModElf = (PRTLDRMODELF)pMod;
780
781	/*
782	* This operation is currently only available on relocatable images.
783	*/
784	switch (pModElf->Ehdr.e_type)
785	{
786	case ET_REL:
787	break;
788	case ET_EXEC:
789	Log(("RTLdrELF: %s: Executable images are not supported yet!\n", pModElf->Core.pReader->pfnLogName(pModElf->Core.pReader)));
790	return VERR_LDRELF_EXEC;
791	case ET_DYN:
792	Log(("RTLdrELF: %s: Dynamic images are not supported yet!\n", pModElf->Core.pReader->pfnLogName(pModElf->Core.pReader)));
793	return VERR_LDRELF_DYN;
794	default: AssertFailedReturn(VERR_BAD_EXE_FORMAT);
795	}
796
797	/*
798	* Load the bits into pvBits.
799	*/
800	const Elf_Shdr *paShdrs = pModElf->paShdrs;
801	for (unsigned iShdr = 0; iShdr < pModElf->Ehdr.e_shnum; iShdr++)
802	{
803	if (paShdrs[iShdr].sh_flags & SHF_ALLOC)
804	{
805	AssertMsgReturn((size_t)paShdrs[iShdr].sh_size == (size_t)paShdrs[iShdr].sh_size, (FMT_ELF_SIZE "\n", paShdrs[iShdr].sh_size), VERR_IMAGE_TOO_BIG);
806	switch (paShdrs[iShdr].sh_type)
807	{
808	case SHT_NOBITS:
809	memset((uint8_t *)pvBits + paShdrs[iShdr].sh_addr, 0, (size_t)paShdrs[iShdr].sh_size);
810	break;
811
812	case SHT_PROGBITS:
813	default:
814	{
815	int rc = pModElf->Core.pReader->pfnRead(pModElf->Core.pReader, (uint8_t *)pvBits + paShdrs[iShdr].sh_addr,
816	(size_t)paShdrs[iShdr].sh_size, paShdrs[iShdr].sh_offset);
817	if (RT_FAILURE(rc))
818	{
819	Log(("RTLdrELF: %s: Read error when reading " FMT_ELF_SIZE " bytes at " FMT_ELF_OFF ", iShdr=%d\n",
820	pModElf->Core.pReader->pfnLogName(pModElf->Core.pReader),
821	paShdrs[iShdr].sh_size, paShdrs[iShdr].sh_offset, iShdr));
822	return rc;
823	}
824	}
825	}
826	}
827	}
828
829	/*
830	* Relocate the image.
831	*/
832	return pModElf->Core.pOps->pfnRelocate(pMod, pvBits, BaseAddress, ~(RTUINTPTR)0, pfnGetImport, pvUser);
833	}
834
835
836	/** @copydoc RTLDROPS::Relocate */
837	static DECLCALLBACK(int) RTLDRELF_NAME(Relocate)(PRTLDRMODINTERNAL pMod, void *pvBits, RTUINTPTR NewBaseAddress,
838	RTUINTPTR OldBaseAddress, PFNRTLDRIMPORT pfnGetImport, void *pvUser)
839	{
840	PRTLDRMODELF pModElf = (PRTLDRMODELF)pMod;
841	#ifdef LOG_ENABLED
842	const char *pszLogName = pModElf->Core.pReader->pfnLogName(pModElf->Core.pReader);
843	#endif
844	NOREF(OldBaseAddress);
845
846	/*
847	* This operation is currently only available on relocatable images.
848	*/
849	switch (pModElf->Ehdr.e_type)
850	{
851	case ET_REL:
852	break;
853	case ET_EXEC:
854	Log(("RTLdrELF: %s: Executable images are not supported yet!\n", pszLogName));
855	return VERR_LDRELF_EXEC;
856	case ET_DYN:
857	Log(("RTLdrELF: %s: Dynamic images are not supported yet!\n", pszLogName));
858	return VERR_LDRELF_DYN;
859	default: AssertFailedReturn(VERR_BAD_EXE_FORMAT);
860	}
861
862	/*
863	* Validate the input.
864	*/
865	Elf_Addr BaseAddr = (Elf_Addr)NewBaseAddress;
866	AssertMsgReturn((RTUINTPTR)BaseAddr == NewBaseAddress, ("%RTptr", NewBaseAddress), VERR_IMAGE_BASE_TOO_HIGH);
867
868	/*
869	* Map the image bits if not already done and setup pointer into it.
870	*/
871	int rc = RTLDRELF_NAME(MapBits)(pModElf, true);
872	if (RT_FAILURE(rc))
873	return rc;
874
875	/*
876	* Iterate the sections looking for interesting SHT_REL[A] sections.
877	* SHT_REL[A] sections have the section index of the section they contain fixups
878	* for in the sh_info member.
879	*/
880	const Elf_Shdr *paShdrs = pModElf->paShdrs;
881	Log2(("rtLdrElf: %s: Fixing up image\n", pszLogName));
882	for (unsigned iShdr = 0; iShdr < pModElf->Ehdr.e_shnum; iShdr++)
883	{
884	const Elf_Shdr *pShdrRel = &paShdrs[iShdr];
885
886	/*
887	* Skip sections without interest to us.
888	*/
889	#if ELF_MODE == 32
890	if (pShdrRel->sh_type != SHT_REL)
891	#else
892	if (pShdrRel->sh_type != SHT_RELA)
893	#endif
894	continue;
895	if (pShdrRel->sh_info >= pModElf->Ehdr.e_shnum)
896	continue;
897	const Elf_Shdr pShdr = &paShdrs[pShdrRel->sh_info]; / the section to fixup. */
898	if (!(pShdr->sh_flags & SHF_ALLOC))
899	continue;
900
901	/*
902	* Relocate the section.
903	*/
904	Log2(("rtldrELF: %s: Relocation records for #%d [%s] (sh_info=%d sh_link=%d) found in #%d [%s] (sh_info=%d sh_link=%d)\n",
905	pszLogName, (int)pShdrRel->sh_info, ELF_SH_STR(pModElf, pShdr->sh_name), (int)pShdr->sh_info, (int)pShdr->sh_link,
906	iShdr, ELF_SH_STR(pModElf, pShdrRel->sh_name), (int)pShdrRel->sh_info, (int)pShdrRel->sh_link));
907
908	/** @todo Make RelocateSection a function pointer so we can select the one corresponding to the machine when opening the image. */
909	if (pModElf->Ehdr.e_type == ET_REL)
910	rc = RTLDRELF_NAME(RelocateSection)(pModElf, BaseAddr, pfnGetImport, pvUser,
911	pShdr->sh_addr,
912	pShdr->sh_size,
913	(const uint8_t *)pModElf->pvBits + pShdr->sh_offset,
914	(uint8_t *)pvBits + pShdr->sh_addr,
915	(const uint8_t *)pModElf->pvBits + pShdrRel->sh_offset,
916	pShdrRel->sh_size);
917	else
918	rc = RTLDRELF_NAME(RelocateSectionExecDyn)(pModElf, BaseAddr, pfnGetImport, pvUser,
919	pShdr->sh_addr,
920	pShdr->sh_size,
921	(const uint8_t *)pModElf->pvBits + pShdr->sh_offset,
922	(uint8_t *)pvBits + pShdr->sh_addr,
923	(const uint8_t *)pModElf->pvBits + pShdrRel->sh_offset,
924	pShdrRel->sh_size);
925	if (RT_FAILURE(rc))
926	return rc;
927	}
928	return VINF_SUCCESS;
929	}
930
931
932	/**
933	* Worker for pfnGetSymbolEx.
934	*/
935	static int RTLDRELF_NAME(ReturnSymbol)(PRTLDRMODELF pThis, const Elf_Sym *pSym, Elf_Addr uBaseAddr, PRTUINTPTR pValue)
936	{
937	Elf_Addr Value;
938	if (pSym->st_shndx == SHN_ABS)
939	/* absolute symbols are not subject to any relocation. */
940	Value = pSym->st_value;
941	else if (pSym->st_shndx < pThis->Ehdr.e_shnum)
942	{
943	if (pThis->Ehdr.e_type == ET_REL)
944	/* relative to the section. */
945	Value = uBaseAddr + pSym->st_value + pThis->paShdrs[pSym->st_shndx].sh_addr;
946	else /* Fixed up for link address. */
947	Value = uBaseAddr + pSym->st_value - pThis->LinkAddress;
948	}
949	else
950	{
951	AssertMsgFailed(("Arg! pSym->st_shndx=%d\n", pSym->st_shndx));
952	return VERR_BAD_EXE_FORMAT;
953	}
954	AssertMsgReturn(Value == (RTUINTPTR)Value, (FMT_ELF_ADDR "\n", Value), VERR_SYMBOL_VALUE_TOO_BIG);
955	*pValue = (RTUINTPTR)Value;
956	return VINF_SUCCESS;
957	}
958
959
960	/** @copydoc RTLDROPS::pfnGetSymbolEx */
961	static DECLCALLBACK(int) RTLDRELF_NAME(GetSymbolEx)(PRTLDRMODINTERNAL pMod, const void *pvBits, RTUINTPTR BaseAddress,
962	uint32_t iOrdinal, const char pszSymbol, RTUINTPTR pValue)
963	{
964	PRTLDRMODELF pModElf = (PRTLDRMODELF)pMod;
965	NOREF(pvBits);
966
967	/*
968	* Validate the input.
969	*/
970	Elf_Addr uBaseAddr = (Elf_Addr)BaseAddress;
971	AssertMsgReturn((RTUINTPTR)uBaseAddr == BaseAddress, ("%RTptr", BaseAddress), VERR_IMAGE_BASE_TOO_HIGH);
972
973	/*
974	* Map the image bits if not already done and setup pointer into it.
975	*/
976	int rc = RTLDRELF_NAME(MapBits)(pModElf, true);
977	if (RT_FAILURE(rc))
978	return rc;
979
980	/*
981	* Calc all kinds of pointers before we start iterating the symbol table.
982	*/
983	const Elf_Sym *paSyms = pModElf->paSyms;
984	unsigned cSyms = pModElf->cSyms;
985	if (iOrdinal == UINT32_MAX)
986	{
987	const char *pStr = pModElf->pStr;
988	for (unsigned iSym = 1; iSym < cSyms; iSym++)
989	{
990	/* Undefined symbols are not exports, they are imports. */
991	if ( paSyms[iSym].st_shndx != SHN_UNDEF
992	&& ( ELF_ST_BIND(paSyms[iSym].st_info) == STB_GLOBAL
993	\|\| ELF_ST_BIND(paSyms[iSym].st_info) == STB_WEAK))
994	{
995	/* Validate the name string and try match with it. */
996	if (paSyms[iSym].st_name < pModElf->cbStr)
997	{
998	if (!strcmp(pszSymbol, pStr + paSyms[iSym].st_name))
999	{
1000	/* matched! */
1001	return RTLDRELF_NAME(ReturnSymbol)(pModElf, &paSyms[iSym], uBaseAddr, pValue);
1002	}
1003	}
1004	else
1005	{
1006	AssertMsgFailed(("String outside string table! iSym=%d paSyms[iSym].st_name=%#x\n", iSym, paSyms[iSym].st_name));
1007	return VERR_LDRELF_INVALID_SYMBOL_NAME_OFFSET;
1008	}
1009	}
1010	}
1011	}
1012	else if (iOrdinal < cSyms)
1013	{
1014	if ( paSyms[iOrdinal].st_shndx != SHN_UNDEF
1015	&& ( ELF_ST_BIND(paSyms[iOrdinal].st_info) == STB_GLOBAL
1016	\|\| ELF_ST_BIND(paSyms[iOrdinal].st_info) == STB_WEAK))
1017	return RTLDRELF_NAME(ReturnSymbol)(pModElf, &paSyms[iOrdinal], uBaseAddr, pValue);
1018	}
1019
1020	return VERR_SYMBOL_NOT_FOUND;
1021	}
1022
1023
1024	/** @copydoc RTLDROPS::pfnEnumDbgInfo */
1025	static DECLCALLBACK(int) RTLDRELF_NAME(EnumDbgInfo)(PRTLDRMODINTERNAL pMod, const void *pvBits,
1026	PFNRTLDRENUMDBG pfnCallback, void *pvUser)
1027	{
1028	PRTLDRMODELF pModElf = (PRTLDRMODELF)pMod;
1029	RT_NOREF_PV(pvBits);
1030
1031	/*
1032	* Map the image bits if not already done and setup pointer into it.
1033	*/
1034	int rc = RTLDRELF_NAME(MapBits)(pModElf, true);
1035	if (RT_FAILURE(rc))
1036	return rc;
1037
1038	/*
1039	* Do the enumeration.
1040	*/
1041	const Elf_Shdr *paShdrs = pModElf->paOrgShdrs;
1042	for (unsigned iShdr = 0; iShdr < pModElf->Ehdr.e_shnum; iShdr++)
1043	{
1044	/* Debug sections are expected to be PROGBITS and not allocated. */
1045	if (paShdrs[iShdr].sh_type != SHT_PROGBITS)
1046	continue;
1047	if (paShdrs[iShdr].sh_flags & SHF_ALLOC)
1048	continue;
1049
1050	RTLDRDBGINFO DbgInfo;
1051	const char *pszSectName = ELF_SH_STR(pModElf, paShdrs[iShdr].sh_name);
1052	if ( !strncmp(pszSectName, RT_STR_TUPLE(".debug_"))
1053	\|\| !strcmp(pszSectName, ".WATCOM_references") )
1054	{
1055	RT_ZERO(DbgInfo.u);
1056	DbgInfo.enmType = RTLDRDBGINFOTYPE_DWARF;
1057	DbgInfo.pszExtFile = NULL;
1058	DbgInfo.offFile = paShdrs[iShdr].sh_offset;
1059	DbgInfo.cb = paShdrs[iShdr].sh_size;
1060	DbgInfo.u.Dwarf.pszSection = pszSectName;
1061	}
1062	else if (!strcmp(pszSectName, ".gnu_debuglink"))
1063	{
1064	if ((paShdrs[iShdr].sh_size & 3) \|\| paShdrs[iShdr].sh_size < 8)
1065	return VERR_BAD_EXE_FORMAT;
1066
1067	RT_ZERO(DbgInfo.u);
1068	DbgInfo.enmType = RTLDRDBGINFOTYPE_DWARF_DWO;
1069	DbgInfo.pszExtFile = (const char *)((uintptr_t)pModElf->pvBits + (uintptr_t)paShdrs[iShdr].sh_offset);
1070	if (!RTStrEnd(DbgInfo.pszExtFile, paShdrs[iShdr].sh_size))
1071	return VERR_BAD_EXE_FORMAT;
1072	DbgInfo.u.Dwo.uCrc32 = (uint32_t )((uintptr_t)DbgInfo.pszExtFile + (uintptr_t)paShdrs[iShdr].sh_size
1073	- sizeof(uint32_t));
1074	DbgInfo.offFile = -1;
1075	DbgInfo.cb = 0;
1076	}
1077	else
1078	continue;
1079
1080	DbgInfo.LinkAddress = NIL_RTLDRADDR;
1081	DbgInfo.iDbgInfo = iShdr - 1;
1082
1083	rc = pfnCallback(pMod, &DbgInfo, pvUser);
1084	if (rc != VINF_SUCCESS)
1085	return rc;
1086
1087	}
1088
1089	return VINF_SUCCESS;
1090	}
1091
1092
1093	/**
1094	* Helper that locates the first allocated section.
1095	*
1096	* @returns Pointer to the section header if found, NULL if none.
1097	* @param pShdr The section header to start searching at.
1098	* @param cLeft The number of section headers left to search. Can be 0.
1099	*/
1100	static const Elf_Shdr RTLDRELF_NAME(GetFirstAllocatedSection)(const Elf_Shdr pShdr, unsigned cLeft)
1101	{
1102	while (cLeft-- > 0)
1103	{
1104	if (pShdr->sh_flags & SHF_ALLOC)
1105	return pShdr;
1106	pShdr++;
1107	}
1108	return NULL;
1109	}
1110
1111	/** @copydoc RTLDROPS::pfnEnumSegments. */
1112	static DECLCALLBACK(int) RTLDRELF_NAME(EnumSegments)(PRTLDRMODINTERNAL pMod, PFNRTLDRENUMSEGS pfnCallback, void *pvUser)
1113	{
1114	PRTLDRMODELF pModElf = (PRTLDRMODELF)pMod;
1115
1116	/*
1117	* Map the image bits if not already done and setup pointer into it.
1118	*/
1119	int rc = RTLDRELF_NAME(MapBits)(pModElf, true);
1120	if (RT_FAILURE(rc))
1121	return rc;
1122
1123	/*
1124	* Do the enumeration.
1125	*/
1126	char szName[32];
1127	Elf_Addr uPrevMappedRva = 0;
1128	const Elf_Shdr *paShdrs = pModElf->paShdrs;
1129	const Elf_Shdr *paOrgShdrs = pModElf->paOrgShdrs;
1130	for (unsigned iShdr = 1; iShdr < pModElf->Ehdr.e_shnum; iShdr++)
1131	{
1132	RTLDRSEG Seg;
1133	Seg.pszName = ELF_SH_STR(pModElf, paShdrs[iShdr].sh_name);
1134	Seg.cchName = (uint32_t)strlen(Seg.pszName);
1135	if (Seg.cchName == 0)
1136	{
1137	Seg.pszName = szName;
1138	Seg.cchName = (uint32_t)RTStrPrintf(szName, sizeof(szName), "UnamedSect%02u", iShdr);
1139	}
1140	Seg.SelFlat = 0;
1141	Seg.Sel16bit = 0;
1142	Seg.fFlags = 0;
1143	Seg.fProt = RTMEM_PROT_READ;
1144	if (paShdrs[iShdr].sh_flags & SHF_WRITE)
1145	Seg.fProt \|= RTMEM_PROT_WRITE;
1146	if (paShdrs[iShdr].sh_flags & SHF_EXECINSTR)
1147	Seg.fProt \|= RTMEM_PROT_EXEC;
1148	Seg.cb = paShdrs[iShdr].sh_size;
1149	Seg.Alignment = paShdrs[iShdr].sh_addralign;
1150	if (paShdrs[iShdr].sh_flags & SHF_ALLOC)
1151	{
1152	Seg.LinkAddress = paOrgShdrs[iShdr].sh_addr;
1153	Seg.RVA = paShdrs[iShdr].sh_addr;
1154	const Elf_Shdr *pShdr2 = RTLDRELF_NAME(GetFirstAllocatedSection)(&paShdrs[iShdr + 1],
1155	pModElf->Ehdr.e_shnum - iShdr - 1);
1156	if ( pShdr2
1157	&& pShdr2->sh_addr >= paShdrs[iShdr].sh_addr
1158	&& Seg.RVA >= uPrevMappedRva)
1159	Seg.cbMapped = pShdr2->sh_addr - paShdrs[iShdr].sh_addr;
1160	else
1161	Seg.cbMapped = RT_MAX(paShdrs[iShdr].sh_size, paShdrs[iShdr].sh_addralign);
1162	uPrevMappedRva = Seg.RVA;
1163	}
1164	else
1165	{
1166	Seg.LinkAddress = NIL_RTLDRADDR;
1167	Seg.RVA = NIL_RTLDRADDR;
1168	Seg.cbMapped = NIL_RTLDRADDR;
1169	}
1170	if (paShdrs[iShdr].sh_type != SHT_NOBITS)
1171	{
1172	Seg.offFile = paShdrs[iShdr].sh_offset;
1173	Seg.cbFile = paShdrs[iShdr].sh_size;
1174	}
1175	else
1176	{
1177	Seg.offFile = -1;
1178	Seg.cbFile = 0;
1179	}
1180
1181	rc = pfnCallback(pMod, &Seg, pvUser);
1182	if (rc != VINF_SUCCESS)
1183	return rc;
1184	}
1185
1186	return VINF_SUCCESS;
1187	}
1188
1189
1190	/** @copydoc RTLDROPS::pfnLinkAddressToSegOffset. */
1191	static DECLCALLBACK(int) RTLDRELF_NAME(LinkAddressToSegOffset)(PRTLDRMODINTERNAL pMod, RTLDRADDR LinkAddress,
1192	uint32_t *piSeg, PRTLDRADDR poffSeg)
1193	{
1194	PRTLDRMODELF pModElf = (PRTLDRMODELF)pMod;
1195
1196	const Elf_Shdr *pShdrEnd = NULL;
1197	unsigned cLeft = pModElf->Ehdr.e_shnum - 1;
1198	const Elf_Shdr *pShdr = &pModElf->paOrgShdrs[cLeft];
1199	while (cLeft-- > 0)
1200	{
1201	if (pShdr->sh_flags & SHF_ALLOC)
1202	{
1203	RTLDRADDR offSeg = LinkAddress - pShdr->sh_addr;
1204	if (offSeg < pShdr->sh_size)
1205	{
1206	*poffSeg = offSeg;
1207	*piSeg = cLeft;
1208	return VINF_SUCCESS;
1209	}
1210	if (offSeg == pShdr->sh_size)
1211	pShdrEnd = pShdr;
1212	}
1213	pShdr--;
1214	}
1215
1216	if (pShdrEnd)
1217	{
1218	*poffSeg = pShdrEnd->sh_size;
1219	*piSeg = pShdrEnd - pModElf->paOrgShdrs - 1;
1220	return VINF_SUCCESS;
1221	}
1222
1223	return VERR_LDR_INVALID_LINK_ADDRESS;
1224	}
1225
1226
1227	/** @copydoc RTLDROPS::pfnLinkAddressToRva. */
1228	static DECLCALLBACK(int) RTLDRELF_NAME(LinkAddressToRva)(PRTLDRMODINTERNAL pMod, RTLDRADDR LinkAddress, PRTLDRADDR pRva)
1229	{
1230	PRTLDRMODELF pModElf = (PRTLDRMODELF)pMod;
1231	uint32_t iSeg;
1232	RTLDRADDR offSeg;
1233	int rc = RTLDRELF_NAME(LinkAddressToSegOffset)(pMod, LinkAddress, &iSeg, &offSeg);
1234	if (RT_SUCCESS(rc))
1235	*pRva = pModElf->paShdrs[iSeg + 1].sh_addr + offSeg;
1236	return rc;
1237	}
1238
1239
1240	/** @copydoc RTLDROPS::pfnSegOffsetToRva. */
1241	static DECLCALLBACK(int) RTLDRELF_NAME(SegOffsetToRva)(PRTLDRMODINTERNAL pMod, uint32_t iSeg, RTLDRADDR offSeg,
1242	PRTLDRADDR pRva)
1243	{
1244	PRTLDRMODELF pModElf = (PRTLDRMODELF)pMod;
1245	if (iSeg >= pModElf->Ehdr.e_shnum - 1U)
1246	return VERR_LDR_INVALID_SEG_OFFSET;
1247
1248	iSeg++; /* skip section 0 */
1249	if (offSeg > pModElf->paShdrs[iSeg].sh_size)
1250	{
1251	const Elf_Shdr *pShdr2 = RTLDRELF_NAME(GetFirstAllocatedSection)(&pModElf->paShdrs[iSeg + 1],
1252	pModElf->Ehdr.e_shnum - iSeg - 1);
1253	if ( !pShdr2
1254	\|\| offSeg > (pShdr2->sh_addr - pModElf->paShdrs[iSeg].sh_addr))
1255	return VERR_LDR_INVALID_SEG_OFFSET;
1256	}
1257
1258	if (!(pModElf->paShdrs[iSeg].sh_flags & SHF_ALLOC))
1259	return VERR_LDR_INVALID_SEG_OFFSET;
1260
1261	*pRva = pModElf->paShdrs[iSeg].sh_addr;
1262	return VINF_SUCCESS;
1263	}
1264
1265
1266	/** @copydoc RTLDROPS::pfnRvaToSegOffset. */
1267	static DECLCALLBACK(int) RTLDRELF_NAME(RvaToSegOffset)(PRTLDRMODINTERNAL pMod, RTLDRADDR Rva,
1268	uint32_t *piSeg, PRTLDRADDR poffSeg)
1269	{
1270	PRTLDRMODELF pModElf = (PRTLDRMODELF)pMod;
1271
1272	Elf_Addr PrevAddr = 0;
1273	unsigned cLeft = pModElf->Ehdr.e_shnum - 1;
1274	const Elf_Shdr *pShdr = &pModElf->paShdrs[cLeft];
1275	while (cLeft-- > 0)
1276	{
1277	if (pShdr->sh_flags & SHF_ALLOC)
1278	{
1279	Elf_Addr cbSeg = PrevAddr ? PrevAddr - pShdr->sh_addr : pShdr->sh_size;
1280	RTLDRADDR offSeg = Rva - pShdr->sh_addr;
1281	if (offSeg <= cbSeg)
1282	{
1283	*poffSeg = offSeg;
1284	*piSeg = cLeft;
1285	return VINF_SUCCESS;
1286	}
1287	PrevAddr = pShdr->sh_addr;
1288	}
1289	pShdr--;
1290	}
1291
1292	return VERR_LDR_INVALID_RVA;
1293	}
1294
1295
1296	/** @callback_method_impl{FNRTLDRIMPORT, Stub used by ReadDbgInfo.} */
1297	static DECLCALLBACK(int) RTLDRELF_NAME(GetImportStubCallback)(RTLDRMOD hLdrMod, const char pszModule, const char pszSymbol,
1298	unsigned uSymbol, PRTLDRADDR pValue, void *pvUser)
1299	{
1300	RT_NOREF_PV(hLdrMod); RT_NOREF_PV(pszModule); RT_NOREF_PV(pszSymbol);
1301	RT_NOREF_PV(uSymbol); RT_NOREF_PV(pValue); RT_NOREF_PV(pvUser);
1302	return VERR_SYMBOL_NOT_FOUND;
1303	}
1304
1305
1306	/** @copydoc RTLDROPS::pfnReadDbgInfo. */
1307	static DECLCALLBACK(int) RTLDRELF_NAME(ReadDbgInfo)(PRTLDRMODINTERNAL pMod, uint32_t iDbgInfo, RTFOFF off,
1308	size_t cb, void *pvBuf)
1309	{
1310	PRTLDRMODELF pThis = (PRTLDRMODELF)pMod;
1311	LogFlow(("%s: iDbgInfo=%#x off=%RTfoff cb=%#zu\n", __FUNCTION__, iDbgInfo, off, cb));
1312
1313	/*
1314	* Input validation.
1315	*/
1316	AssertReturn(iDbgInfo < pThis->Ehdr.e_shnum && iDbgInfo + 1 < pThis->Ehdr.e_shnum, VERR_INVALID_PARAMETER);
1317	iDbgInfo++;
1318	AssertReturn(!(pThis->paShdrs[iDbgInfo].sh_flags & SHF_ALLOC), VERR_INVALID_PARAMETER);
1319	AssertReturn(pThis->paShdrs[iDbgInfo].sh_type == SHT_PROGBITS, VERR_INVALID_PARAMETER);
1320	AssertReturn(pThis->paShdrs[iDbgInfo].sh_offset == (uint64_t)off, VERR_INVALID_PARAMETER);
1321	AssertReturn(pThis->paShdrs[iDbgInfo].sh_size == cb, VERR_INVALID_PARAMETER);
1322	RTFOFF cbRawImage = pThis->Core.pReader->pfnSize(pThis->Core.pReader);
1323	AssertReturn(cbRawImage >= 0, VERR_INVALID_PARAMETER);
1324	AssertReturn(off >= 0 && cb <= (uint64_t)cbRawImage && (uint64_t)off + cb <= (uint64_t)cbRawImage, VERR_INVALID_PARAMETER);
1325
1326	/*
1327	* Read it from the file and look for fixup sections.
1328	*/
1329	int rc;
1330	if (pThis->pvBits)
1331	memcpy(pvBuf, (const uint8_t *)pThis->pvBits + (size_t)off, cb);
1332	else
1333	{
1334	rc = pThis->Core.pReader->pfnRead(pThis->Core.pReader, pvBuf, cb, off);
1335	if (RT_FAILURE(rc))
1336	return rc;
1337	}
1338
1339	uint32_t iRelocs = iDbgInfo + 1;
1340	if ( iRelocs >= pThis->Ehdr.e_shnum
1341	\|\| pThis->paShdrs[iRelocs].sh_info != iDbgInfo
1342	\|\| ( pThis->paShdrs[iRelocs].sh_type != SHT_REL
1343	&& pThis->paShdrs[iRelocs].sh_type != SHT_RELA) )
1344	{
1345	iRelocs = 0;
1346	while ( iRelocs < pThis->Ehdr.e_shnum
1347	&& ( pThis->paShdrs[iRelocs].sh_info != iDbgInfo
1348	\|\| ( pThis->paShdrs[iRelocs].sh_type != SHT_REL
1349	&& pThis->paShdrs[iRelocs].sh_type != SHT_RELA)) )
1350	iRelocs++;
1351	}
1352	if ( iRelocs < pThis->Ehdr.e_shnum
1353	&& pThis->paShdrs[iRelocs].sh_size > 0)
1354	{
1355	/*
1356	* Load the relocations.
1357	*/
1358	uint8_t *pbRelocsBuf = NULL;
1359	const uint8_t *pbRelocs;
1360	if (pThis->pvBits)
1361	pbRelocs = (const uint8_t *)pThis->pvBits + pThis->paShdrs[iRelocs].sh_offset;
1362	else
1363	{
1364	pbRelocs = pbRelocsBuf = (uint8_t *)RTMemTmpAlloc(pThis->paShdrs[iRelocs].sh_size);
1365	if (!pbRelocsBuf)
1366	return VERR_NO_TMP_MEMORY;
1367	rc = pThis->Core.pReader->pfnRead(pThis->Core.pReader, pbRelocsBuf,
1368	pThis->paShdrs[iRelocs].sh_size,
1369	pThis->paShdrs[iRelocs].sh_offset);
1370	if (RT_FAILURE(rc))
1371	{
1372	RTMemTmpFree(pbRelocsBuf);
1373	return rc;
1374	}
1375	}
1376
1377	/*
1378	* Apply the relocations.
1379	*/
1380	if (pThis->Ehdr.e_type == ET_REL)
1381	rc = RTLDRELF_NAME(RelocateSection)(pThis, pThis->LinkAddress,
1382	RTLDRELF_NAME(GetImportStubCallback), NULL /pvUser/,
1383	pThis->paShdrs[iDbgInfo].sh_addr,
1384	pThis->paShdrs[iDbgInfo].sh_size,
1385	(const uint8_t *)pvBuf,
1386	(uint8_t *)pvBuf,
1387	pbRelocs,
1388	pThis->paShdrs[iRelocs].sh_size);
1389	else
1390	rc = RTLDRELF_NAME(RelocateSectionExecDyn)(pThis, pThis->LinkAddress,
1391	RTLDRELF_NAME(GetImportStubCallback), NULL /pvUser/,
1392	pThis->paShdrs[iDbgInfo].sh_addr,
1393	pThis->paShdrs[iDbgInfo].sh_size,
1394	(const uint8_t *)pvBuf,
1395	(uint8_t *)pvBuf,
1396	pbRelocs,
1397	pThis->paShdrs[iRelocs].sh_size);
1398
1399	RTMemTmpFree(pbRelocsBuf);
1400	}
1401	else
1402	rc = VINF_SUCCESS;
1403	return rc;
1404	}
1405
1406
1407	/**
1408	* @interface_method_impl{RTLDROPS,pfnUnwindFrame}
1409	*/
1410	static DECLCALLBACK(int)
1411	RTLDRELF_NAME(UnwindFrame)(PRTLDRMODINTERNAL pMod, void const *pvBits, uint32_t iSeg, RTUINTPTR off, PRTDBGUNWINDSTATE pState)
1412	{
1413	PRTLDRMODELF pThis = (PRTLDRMODELF)pMod;
1414	LogFlow(("%s: iSeg=%#x off=%RTptr\n", __FUNCTION__, iSeg, off));
1415
1416	/*
1417	* Process the input address, making us both RVA and proper seg:offset out of it.
1418	*/
1419	int rc;
1420	RTLDRADDR uRva = off;
1421	if (iSeg == RTDBGSEGIDX_RVA)
1422	rc = RTLDRELF_NAME(RvaToSegOffset)(pMod, uRva, &iSeg, &off);
1423	else
1424	rc = RTLDRELF_NAME(SegOffsetToRva)(pMod, iSeg, off, &uRva);
1425	AssertRCReturn(rc, rc);
1426
1427	/*
1428	* Map the image bits if not already done and setup pointer into it.
1429	*/
1430	RT_NOREF(pvBits); /** @todo Try use passed in pvBits? */
1431	rc = RTLDRELF_NAME(MapBits)(pThis, true);
1432	if (RT_FAILURE(rc))
1433	return rc;
1434
1435	/*
1436	* Do we need to search for .eh_frame and .eh_frame_hdr?
1437	*/
1438	if (pThis->iShEhFrame == 0)
1439	{
1440	pThis->iShEhFrame = ~0U;
1441	pThis->iShEhFrameHdr = ~0U;
1442	unsigned cLeft = 2;
1443	for (unsigned iShdr = 1; iShdr < pThis->Ehdr.e_shnum; iShdr++)
1444	{
1445	const char *pszName = ELF_SH_STR(pThis, pThis->paShdrs[iShdr].sh_name);
1446	if ( pszName[0] == '.'
1447	&& pszName[1] == 'e'
1448	&& pszName[2] == 'h'
1449	&& pszName[3] == '_'
1450	&& pszName[4] == 'f'
1451	&& pszName[5] == 'r'
1452	&& pszName[6] == 'a'
1453	&& pszName[7] == 'm'
1454	&& pszName[8] == 'e')
1455	{
1456	if (pszName[8] == '\0')
1457	pThis->iShEhFrame = iShdr;
1458	else if ( pszName[8] == '_'
1459	&& pszName[9] == 'h'
1460	&& pszName[10] == 'd'
1461	&& pszName[11] == 'r'
1462	&& pszName[12] == '\0')
1463	pThis->iShEhFrameHdr = iShdr;
1464	else
1465	continue;
1466	if (--cLeft == 0)
1467	break;
1468	}
1469	}
1470	}
1471
1472	/*
1473	* Any info present?
1474	*/
1475	unsigned iShdr = pThis->iShEhFrame;
1476	if ( iShdr != ~0U
1477	&& pThis->paShdrs[iShdr].sh_size > 0)
1478	{
1479	if (pThis->paShdrs[iShdr].sh_flags & SHF_ALLOC)
1480	return rtDwarfUnwind_EhData((uint8_t const *)pThis->pvBits + pThis->paShdrs[iShdr].sh_addr,
1481	pThis->paShdrs[iShdr].sh_size, iSeg, off, uRva, pState, pThis->Core.enmArch);
1482	}
1483	return VERR_DBG_NO_UNWIND_INFO;
1484	}
1485
1486
1487
1488
1489	/**
1490	* The ELF module operations.
1491	*/
1492	static RTLDROPS RTLDRELF_MID(s_rtldrElf,Ops) =
1493	{
1494	#if ELF_MODE == 32
1495	"elf32",
1496	#elif ELF_MODE == 64
1497	"elf64",
1498	#endif
1499	RTLDRELF_NAME(Close),
1500	NULL, /* Get Symbol */
1501	RTLDRELF_NAME(Done),
1502	RTLDRELF_NAME(EnumSymbols),
1503	/* ext: */
1504	RTLDRELF_NAME(GetImageSize),
1505	RTLDRELF_NAME(GetBits),
1506	RTLDRELF_NAME(Relocate),
1507	RTLDRELF_NAME(GetSymbolEx),
1508	NULL /pfnQueryForwarderInfo/,
1509	RTLDRELF_NAME(EnumDbgInfo),
1510	RTLDRELF_NAME(EnumSegments),
1511	RTLDRELF_NAME(LinkAddressToSegOffset),
1512	RTLDRELF_NAME(LinkAddressToRva),
1513	RTLDRELF_NAME(SegOffsetToRva),
1514	RTLDRELF_NAME(RvaToSegOffset),
1515	RTLDRELF_NAME(ReadDbgInfo),
1516	NULL /pfnQueryProp/,
1517	NULL /pfnVerifySignature/,
1518	NULL /pfnHashImage/,
1519	RTLDRELF_NAME(UnwindFrame),
1520	42
1521	};
1522
1523
1524
1525	/**
1526	* Validates the ELF header.
1527	*
1528	* @returns iprt status code.
1529	* @param pEhdr Pointer to the ELF header.
1530	* @param pszLogName The log name.
1531	* @param cbRawImage The size of the raw image.
1532	*/
1533	static int RTLDRELF_NAME(ValidateElfHeader)(const Elf_Ehdr pEhdr, const char pszLogName, uint64_t cbRawImage,
1534	PRTLDRARCH penmArch)
1535	{
1536	Log3(("RTLdrELF: e_ident: %.*Rhxs\n"
1537	"RTLdrELF: e_type: " FMT_ELF_HALF "\n"
1538	"RTLdrELF: e_version: " FMT_ELF_HALF "\n"
1539	"RTLdrELF: e_entry: " FMT_ELF_ADDR "\n"
1540	"RTLdrELF: e_phoff: " FMT_ELF_OFF "\n"
1541	"RTLdrELF: e_shoff: " FMT_ELF_OFF "\n"
1542	"RTLdrELF: e_flags: " FMT_ELF_WORD "\n"
1543	"RTLdrELF: e_ehsize: " FMT_ELF_HALF "\n"
1544	"RTLdrELF: e_phentsize: " FMT_ELF_HALF "\n"
1545	"RTLdrELF: e_phnum: " FMT_ELF_HALF "\n"
1546	"RTLdrELF: e_shentsize: " FMT_ELF_HALF "\n"
1547	"RTLdrELF: e_shnum: " FMT_ELF_HALF "\n"
1548	"RTLdrELF: e_shstrndx: " FMT_ELF_HALF "\n",
1549	RT_ELEMENTS(pEhdr->e_ident), &pEhdr->e_ident[0], pEhdr->e_type, pEhdr->e_version,
1550	pEhdr->e_entry, pEhdr->e_phoff, pEhdr->e_shoff,pEhdr->e_flags, pEhdr->e_ehsize, pEhdr->e_phentsize,
1551	pEhdr->e_phnum, pEhdr->e_shentsize, pEhdr->e_shnum, pEhdr->e_shstrndx));
1552
1553	if ( pEhdr->e_ident[EI_MAG0] != ELFMAG0
1554	\|\| pEhdr->e_ident[EI_MAG1] != ELFMAG1
1555	\|\| pEhdr->e_ident[EI_MAG2] != ELFMAG2
1556	\|\| pEhdr->e_ident[EI_MAG3] != ELFMAG3
1557	)
1558	{
1559	Log(("RTLdrELF: %s: Invalid ELF magic (%.*Rhxs)\n", pszLogName, sizeof(pEhdr->e_ident), pEhdr->e_ident)); NOREF(pszLogName);
1560	return VERR_BAD_EXE_FORMAT;
1561	}
1562	if (pEhdr->e_ident[EI_CLASS] != RTLDRELF_SUFF(ELFCLASS))
1563	{
1564	Log(("RTLdrELF: %s: Invalid ELF class (%.*Rhxs)\n", pszLogName, sizeof(pEhdr->e_ident), pEhdr->e_ident));
1565	return VERR_BAD_EXE_FORMAT;
1566	}
1567	if (pEhdr->e_ident[EI_DATA] != ELFDATA2LSB)
1568	{
1569	Log(("RTLdrELF: %s: ELF endian %x is unsupported\n", pszLogName, pEhdr->e_ident[EI_DATA]));
1570	return VERR_LDRELF_ODD_ENDIAN;
1571	}
1572	if (pEhdr->e_version != EV_CURRENT)
1573	{
1574	Log(("RTLdrELF: %s: ELF version %x is unsupported\n", pszLogName, pEhdr->e_version));
1575	return VERR_LDRELF_VERSION;
1576	}
1577
1578	if (sizeof(Elf_Ehdr) != pEhdr->e_ehsize)
1579	{
1580	Log(("RTLdrELF: %s: Elf header e_ehsize is %d expected %d!\n",
1581	pszLogName, pEhdr->e_ehsize, sizeof(Elf_Ehdr)));
1582	return VERR_BAD_EXE_FORMAT;
1583	}
1584	if ( sizeof(Elf_Phdr) != pEhdr->e_phentsize
1585	&& ( pEhdr->e_phnum != 0
1586	\|\| pEhdr->e_type == ET_DYN))
1587	{
1588	Log(("RTLdrELF: %s: Elf header e_phentsize is %d expected %d!\n",
1589	pszLogName, pEhdr->e_phentsize, sizeof(Elf_Phdr)));
1590	return VERR_BAD_EXE_FORMAT;
1591	}
1592	if (sizeof(Elf_Shdr) != pEhdr->e_shentsize)
1593	{
1594	Log(("RTLdrELF: %s: Elf header e_shentsize is %d expected %d!\n",
1595	pszLogName, pEhdr->e_shentsize, sizeof(Elf_Shdr)));
1596	return VERR_BAD_EXE_FORMAT;
1597	}
1598
1599	switch (pEhdr->e_type)
1600	{
1601	case ET_REL:
1602	case ET_EXEC:
1603	case ET_DYN:
1604	break;
1605	default:
1606	Log(("RTLdrELF: %s: image type %#x is not supported!\n", pszLogName, pEhdr->e_type));
1607	return VERR_BAD_EXE_FORMAT;
1608	}
1609
1610	switch (pEhdr->e_machine)
1611	{
1612	#if ELF_MODE == 32
1613	case EM_386:
1614	case EM_486:
1615	*penmArch = RTLDRARCH_X86_32;
1616	break;
1617	#elif ELF_MODE == 64
1618	case EM_X86_64:
1619	*penmArch = RTLDRARCH_AMD64;
1620	break;
1621	#endif
1622	default:
1623	Log(("RTLdrELF: %s: machine type %u is not supported!\n", pszLogName, pEhdr->e_machine));
1624	return VERR_LDRELF_MACHINE;
1625	}
1626
1627	if ( pEhdr->e_phoff < pEhdr->e_ehsize
1628	&& !(pEhdr->e_phoff && pEhdr->e_phnum)
1629	&& pEhdr->e_phnum)
1630	{
1631	Log(("RTLdrELF: %s: The program headers overlap with the ELF header! e_phoff=" FMT_ELF_OFF "\n",
1632	pszLogName, pEhdr->e_phoff));
1633	return VERR_BAD_EXE_FORMAT;
1634	}
1635	if ( pEhdr->e_phoff + pEhdr->e_phnum * pEhdr->e_phentsize > cbRawImage
1636	\|\| pEhdr->e_phoff + pEhdr->e_phnum * pEhdr->e_phentsize < pEhdr->e_phoff)
1637	{
1638	Log(("RTLdrELF: %s: The program headers extends beyond the file! e_phoff=" FMT_ELF_OFF " e_phnum=" FMT_ELF_HALF "\n",
1639	pszLogName, pEhdr->e_phoff, pEhdr->e_phnum));
1640	return VERR_BAD_EXE_FORMAT;
1641	}
1642
1643
1644	if ( pEhdr->e_shoff < pEhdr->e_ehsize
1645	&& !(pEhdr->e_shoff && pEhdr->e_shnum))
1646	{
1647	Log(("RTLdrELF: %s: The section headers overlap with the ELF header! e_shoff=" FMT_ELF_OFF "\n",
1648	pszLogName, pEhdr->e_shoff));
1649	return VERR_BAD_EXE_FORMAT;
1650	}
1651	if ( pEhdr->e_shoff + pEhdr->e_shnum * pEhdr->e_shentsize > cbRawImage
1652	\|\| pEhdr->e_shoff + pEhdr->e_shnum * pEhdr->e_shentsize < pEhdr->e_shoff)
1653	{
1654	Log(("RTLdrELF: %s: The section headers extends beyond the file! e_shoff=" FMT_ELF_OFF " e_shnum=" FMT_ELF_HALF "\n",
1655	pszLogName, pEhdr->e_shoff, pEhdr->e_shnum));
1656	return VERR_BAD_EXE_FORMAT;
1657	}
1658
1659	if (pEhdr->e_shstrndx == 0 \|\| pEhdr->e_shstrndx > pEhdr->e_shnum)
1660	{
1661	Log(("RTLdrELF: %s: The section headers string table is out of bounds! e_shstrndx=" FMT_ELF_HALF " e_shnum=" FMT_ELF_HALF "\n",
1662	pszLogName, pEhdr->e_shstrndx, pEhdr->e_shnum));
1663	return VERR_BAD_EXE_FORMAT;
1664	}
1665
1666	return VINF_SUCCESS;
1667	}
1668
1669	/**
1670	* Gets the section header name.
1671	*
1672	* @returns pszName.
1673	* @param pEhdr The elf header.
1674	* @param offName The offset of the section header name.
1675	* @param pszName Where to store the name.
1676	* @param cbName The size of the buffer pointed to by pszName.
1677	*/
1678	const char RTLDRELF_NAME(GetSHdrName)(PRTLDRMODELF pModElf, Elf_Word offName, char pszName, size_t cbName)
1679	{
1680	RTFOFF off = pModElf->paShdrs[pModElf->Ehdr.e_shstrndx].sh_offset + offName;
1681	int rc = pModElf->Core.pReader->pfnRead(pModElf->Core.pReader, pszName, cbName - 1, off);
1682	if (RT_FAILURE(rc))
1683	{
1684	/* read by for byte. */
1685	for (unsigned i = 0; i < cbName; i++, off++)
1686	{
1687	rc = pModElf->Core.pReader->pfnRead(pModElf->Core.pReader, pszName + i, 1, off);
1688	if (RT_FAILURE(rc))
1689	{
1690	pszName[i] = '\0';
1691	break;
1692	}
1693	}
1694	}
1695
1696	pszName[cbName - 1] = '\0';
1697	return pszName;
1698	}
1699
1700
1701	/**
1702	* Validates a section header.
1703	*
1704	* @returns iprt status code.
1705	* @param pModElf Pointer to the module structure.
1706	* @param iShdr The index of section header which should be validated.
1707	* The section headers are found in the pModElf->paShdrs array.
1708	* @param pszLogName The log name.
1709	* @param cbRawImage The size of the raw image.
1710	*/
1711	static int RTLDRELF_NAME(ValidateSectionHeader)(PRTLDRMODELF pModElf, unsigned iShdr, const char *pszLogName, RTFOFF cbRawImage)
1712	{
1713	const Elf_Shdr *pShdr = &pModElf->paShdrs[iShdr];
1714	char szSectionName[80]; NOREF(szSectionName);
1715	Log3(("RTLdrELF: Section Header #%d:\n"
1716	"RTLdrELF: sh_name: " FMT_ELF_WORD " - %s\n"
1717	"RTLdrELF: sh_type: " FMT_ELF_WORD " (%s)\n"
1718	"RTLdrELF: sh_flags: " FMT_ELF_XWORD "\n"
1719	"RTLdrELF: sh_addr: " FMT_ELF_ADDR "\n"
1720	"RTLdrELF: sh_offset: " FMT_ELF_OFF "\n"
1721	"RTLdrELF: sh_size: " FMT_ELF_XWORD "\n"
1722	"RTLdrELF: sh_link: " FMT_ELF_WORD "\n"
1723	"RTLdrELF: sh_info: " FMT_ELF_WORD "\n"
1724	"RTLdrELF: sh_addralign: " FMT_ELF_XWORD "\n"
1725	"RTLdrELF: sh_entsize: " FMT_ELF_XWORD "\n",
1726	iShdr,
1727	pShdr->sh_name, RTLDRELF_NAME(GetSHdrName)(pModElf, pShdr->sh_name, szSectionName, sizeof(szSectionName)),
1728	pShdr->sh_type, rtldrElfGetShdrType(pShdr->sh_type), pShdr->sh_flags, pShdr->sh_addr,
1729	pShdr->sh_offset, pShdr->sh_size, pShdr->sh_link, pShdr->sh_info, pShdr->sh_addralign,
1730	pShdr->sh_entsize));
1731
1732	if (iShdr == 0)
1733	{
1734	if ( pShdr->sh_name != 0
1735	\|\| pShdr->sh_type != SHT_NULL
1736	\|\| pShdr->sh_flags != 0
1737	\|\| pShdr->sh_addr != 0
1738	\|\| pShdr->sh_size != 0
1739	\|\| pShdr->sh_offset != 0
1740	\|\| pShdr->sh_link != SHN_UNDEF
1741	\|\| pShdr->sh_addralign != 0
1742	\|\| pShdr->sh_entsize != 0 )
1743	{
1744	Log(("RTLdrELF: %s: Bad #0 section: %.Rhxs\n", pszLogName, sizeof(pShdr), pShdr ));
1745	return VERR_BAD_EXE_FORMAT;
1746	}
1747	return VINF_SUCCESS;
1748	}
1749
1750	if (pShdr->sh_name >= pModElf->cbShStr)
1751	{
1752	Log(("RTLdrELF: %s: Shdr #%d: sh_name (%d) is beyond the end of the section header string table (%d)!\n",
1753	pszLogName, iShdr, pShdr->sh_name, pModElf->cbShStr)); NOREF(pszLogName);
1754	return VERR_BAD_EXE_FORMAT;
1755	}
1756
1757	if (pShdr->sh_link >= pModElf->Ehdr.e_shnum)
1758	{
1759	Log(("RTLdrELF: %s: Shdr #%d: sh_link (%d) is beyond the end of the section table (%d)!\n",
1760	pszLogName, iShdr, pShdr->sh_link, pModElf->Ehdr.e_shnum)); NOREF(pszLogName);
1761	return VERR_BAD_EXE_FORMAT;
1762	}
1763
1764	switch (pShdr->sh_type)
1765	{
1766	/** @todo find specs and check up which sh_info fields indicates section table entries */
1767	case 12301230:
1768	if (pShdr->sh_info >= pModElf->Ehdr.e_shnum)
1769	{
1770	Log(("RTLdrELF: %s: Shdr #%d: sh_info (%d) is beyond the end of the section table (%d)!\n",
1771	pszLogName, iShdr, pShdr->sh_link, pModElf->Ehdr.e_shnum));
1772	return VERR_BAD_EXE_FORMAT;
1773	}
1774	break;
1775
1776	case SHT_NULL:
1777	break;
1778	case SHT_PROGBITS:
1779	case SHT_SYMTAB:
1780	case SHT_STRTAB:
1781	case SHT_RELA:
1782	case SHT_HASH:
1783	case SHT_DYNAMIC:
1784	case SHT_NOTE:
1785	case SHT_NOBITS:
1786	case SHT_REL:
1787	case SHT_SHLIB:
1788	case SHT_DYNSYM:
1789	/*
1790	* For these types sh_info doesn't have any special meaning, or anything which
1791	* we need/can validate now.
1792	*/
1793	break;
1794
1795
1796	default:
1797	Log(("RTLdrELF: %s: Warning, unknown type %d!\n", pszLogName, pShdr->sh_type));
1798	break;
1799	}
1800
1801	if ( pShdr->sh_type != SHT_NOBITS
1802	&& pShdr->sh_size)
1803	{
1804	RTFOFF offEnd = pShdr->sh_offset + pShdr->sh_size;
1805	if ( offEnd > cbRawImage
1806	\|\| offEnd < (RTFOFF)pShdr->sh_offset)
1807	{
1808	Log(("RTLdrELF: %s: Shdr #%d: sh_offset (" FMT_ELF_OFF ") + sh_size (" FMT_ELF_XWORD " = %RTfoff) is beyond the end of the file (%RTfoff)!\n",
1809	pszLogName, iShdr, pShdr->sh_offset, pShdr->sh_size, offEnd, cbRawImage));
1810	return VERR_BAD_EXE_FORMAT;
1811	}
1812	if (pShdr->sh_offset < sizeof(Elf_Ehdr))
1813	{
1814	Log(("RTLdrELF: %s: Shdr #%d: sh_offset (" FMT_ELF_OFF ") + sh_size (" FMT_ELF_XWORD ") is starting in the ELF header!\n",
1815	pszLogName, iShdr, pShdr->sh_offset, pShdr->sh_size));
1816	return VERR_BAD_EXE_FORMAT;
1817	}
1818	}
1819
1820	return VINF_SUCCESS;
1821	}
1822
1823
1824
1825	/**
1826	* Opens an ELF image, fixed bitness.
1827	*
1828	* @returns iprt status code.
1829	* @param pReader The loader reader instance which will provide the raw image bits.
1830	* @param fFlags Reserved, MBZ.
1831	* @param enmArch Architecture specifier.
1832	* @param phLdrMod Where to store the handle.
1833	*/
1834	static int RTLDRELF_NAME(Open)(PRTLDRREADER pReader, uint32_t fFlags, RTLDRARCH enmArch, PRTLDRMOD phLdrMod)
1835	{
1836	const char *pszLogName = pReader->pfnLogName(pReader);
1837	RTFOFF cbRawImage = pReader->pfnSize(pReader);
1838	RT_NOREF_PV(fFlags);
1839
1840	/*
1841	* Create the loader module instance.
1842	*/
1843	PRTLDRMODELF pModElf = (PRTLDRMODELF)RTMemAllocZ(sizeof(*pModElf));
1844	if (!pModElf)
1845	return VERR_NO_MEMORY;
1846
1847	pModElf->Core.u32Magic = RTLDRMOD_MAGIC;
1848	pModElf->Core.eState = LDR_STATE_INVALID;
1849	pModElf->Core.pReader = pReader;
1850	pModElf->Core.enmFormat = RTLDRFMT_ELF;
1851	pModElf->Core.enmType = RTLDRTYPE_OBJECT;
1852	pModElf->Core.enmEndian = RTLDRENDIAN_LITTLE;
1853	#if ELF_MODE == 32
1854	pModElf->Core.enmArch = RTLDRARCH_X86_32;
1855	#else
1856	pModElf->Core.enmArch = RTLDRARCH_AMD64;
1857	#endif
1858	//pModElf->pvBits = NULL;
1859	//pModElf->Ehdr = {0};
1860	//pModElf->paShdrs = NULL;
1861	//pModElf->paSyms = NULL;
1862	pModElf->iSymSh = ~0U;
1863	//pModElf->cSyms = 0;
1864	pModElf->iStrSh = ~0U;
1865	//pModElf->cbStr = 0;
1866	//pModElf->cbImage = 0;
1867	//pModElf->LinkAddress = 0;
1868	//pModElf->pStr = NULL;
1869	//pModElf->cbShStr = 0;
1870	//pModElf->pShStr = NULL;
1871	//pModElf->iShEhFrame = 0;
1872	//pModElf->iShEhFrameHdr = 0;
1873
1874	/*
1875	* Read and validate the ELF header and match up the CPU architecture.
1876	*/
1877	int rc = pReader->pfnRead(pReader, &pModElf->Ehdr, sizeof(pModElf->Ehdr), 0);
1878	if (RT_SUCCESS(rc))
1879	{
1880	RTLDRARCH enmArchImage = RTLDRARCH_INVALID; /* shut up gcc */
1881	rc = RTLDRELF_NAME(ValidateElfHeader)(&pModElf->Ehdr, pszLogName, cbRawImage, &enmArchImage);
1882	if (RT_SUCCESS(rc))
1883	{
1884	if ( enmArch != RTLDRARCH_WHATEVER
1885	&& enmArch != enmArchImage)
1886	rc = VERR_LDR_ARCH_MISMATCH;
1887	}
1888	}
1889	if (RT_SUCCESS(rc))
1890	{
1891	/*
1892	* Read the section headers, keeping a prestine copy for the module
1893	* introspection methods.
1894	*/
1895	size_t const cbShdrs = pModElf->Ehdr.e_shnum * sizeof(Elf_Shdr);
1896	Elf_Shdr paShdrs = (Elf_Shdr )RTMemAlloc(cbShdrs * 2);
1897	if (paShdrs)
1898	{
1899	pModElf->paShdrs = paShdrs;
1900	rc = pReader->pfnRead(pReader, paShdrs, cbShdrs, pModElf->Ehdr.e_shoff);
1901	if (RT_SUCCESS(rc))
1902	{
1903	memcpy(&paShdrs[pModElf->Ehdr.e_shnum], paShdrs, cbShdrs);
1904	pModElf->paOrgShdrs = &paShdrs[pModElf->Ehdr.e_shnum];
1905
1906	pModElf->cbShStr = paShdrs[pModElf->Ehdr.e_shstrndx].sh_size;
1907
1908	/*
1909	* Validate the section headers and find relevant sections.
1910	*/
1911	Elf_Addr uNextAddr = 0;
1912	for (unsigned i = 0; i < pModElf->Ehdr.e_shnum; i++)
1913	{
1914	rc = RTLDRELF_NAME(ValidateSectionHeader)(pModElf, i, pszLogName, cbRawImage);
1915	if (RT_FAILURE(rc))
1916	break;
1917
1918	/* We're looking for symbol tables. */
1919	if (paShdrs[i].sh_type == SHT_SYMTAB)
1920	{
1921	if (pModElf->iSymSh != ~0U)
1922	{
1923	Log(("RTLdrElf: %s: Multiple symbol tabs! iSymSh=%d i=%d\n", pszLogName, pModElf->iSymSh, i));
1924	rc = VERR_LDRELF_MULTIPLE_SYMTABS;
1925	break;
1926	}
1927	pModElf->iSymSh = i;
1928	pModElf->cSyms = (unsigned)(paShdrs[i].sh_size / sizeof(Elf_Sym));
1929	AssertReturn(pModElf->cSyms == paShdrs[i].sh_size / sizeof(Elf_Sym), VERR_IMAGE_TOO_BIG);
1930	pModElf->iStrSh = paShdrs[i].sh_link;
1931	pModElf->cbStr = (unsigned)paShdrs[pModElf->iStrSh].sh_size;
1932	AssertReturn(pModElf->cbStr == paShdrs[pModElf->iStrSh].sh_size, VERR_IMAGE_TOO_BIG);
1933	}
1934
1935	/* Special checks for the section string table. */
1936	if (i == pModElf->Ehdr.e_shstrndx)
1937	{
1938	if (paShdrs[i].sh_type != SHT_STRTAB)
1939	{
1940	Log(("RTLdrElf: Section header string table is not a SHT_STRTAB: %#x\n", paShdrs[i].sh_type));
1941	rc = VERR_BAD_EXE_FORMAT;
1942	break;
1943	}
1944	if (paShdrs[i].sh_size == 0)
1945	{
1946	Log(("RTLdrElf: Section header string table is empty\n"));
1947	rc = VERR_BAD_EXE_FORMAT;
1948	break;
1949	}
1950	}
1951
1952	/* Kluge for the .data..percpu segment in 64-bit linux kernels. */
1953	if (paShdrs[i].sh_flags & SHF_ALLOC)
1954	{
1955	if ( paShdrs[i].sh_addr == 0
1956	&& paShdrs[i].sh_addr < uNextAddr)
1957	{
1958	Elf_Addr uAddr = RT_ALIGN_T(uNextAddr, paShdrs[i].sh_addralign, Elf_Addr);
1959	Log(("RTLdrElf: Out of order section #%d; adjusting sh_addr from " FMT_ELF_ADDR " to " FMT_ELF_ADDR "\n",
1960	i, paShdrs[i].sh_addr, uAddr));
1961	paShdrs[i].sh_addr = uAddr;
1962	}
1963	uNextAddr = paShdrs[i].sh_addr + paShdrs[i].sh_size;
1964	}
1965	} /* for each section header */
1966
1967	/*
1968	* Calculate the image base address if the image isn't relocatable.
1969	*/
1970	if (RT_SUCCESS(rc) && pModElf->Ehdr.e_type != ET_REL)
1971	{
1972	pModElf->LinkAddress = ~(Elf_Addr)0;
1973	for (unsigned i = 0; i < pModElf->Ehdr.e_shnum; i++)
1974	if ( (paShdrs[i].sh_flags & SHF_ALLOC)
1975	&& paShdrs[i].sh_addr < pModElf->LinkAddress)
1976	pModElf->LinkAddress = paShdrs[i].sh_addr;
1977	if (pModElf->LinkAddress == ~(Elf_Addr)0)
1978	{
1979	AssertFailed();
1980	rc = VERR_LDR_GENERAL_FAILURE;
1981	}
1982	}
1983
1984	/*
1985	* Perform allocations / RVA calculations, determine the image size.
1986	*/
1987	if (RT_SUCCESS(rc))
1988	for (unsigned i = 0; i < pModElf->Ehdr.e_shnum; i++)
1989	if (paShdrs[i].sh_flags & SHF_ALLOC)
1990	{
1991	if (pModElf->Ehdr.e_type == ET_REL)
1992	paShdrs[i].sh_addr = paShdrs[i].sh_addralign
1993	? RT_ALIGN_T(pModElf->cbImage, paShdrs[i].sh_addralign, Elf_Addr)
1994	: (Elf_Addr)pModElf->cbImage;
1995	else
1996	paShdrs[i].sh_addr -= pModElf->LinkAddress;
1997	Elf_Addr EndAddr = paShdrs[i].sh_addr + paShdrs[i].sh_size;
1998	if (pModElf->cbImage < EndAddr)
1999	{
2000	pModElf->cbImage = (size_t)EndAddr;
2001	AssertMsgReturn(pModElf->cbImage == EndAddr, (FMT_ELF_ADDR "\n", EndAddr), VERR_IMAGE_TOO_BIG);
2002	}
2003	Log2(("RTLdrElf: %s: Assigned " FMT_ELF_ADDR " to section #%d\n", pszLogName, paShdrs[i].sh_addr, i));
2004	}
2005
2006	Log2(("RTLdrElf: iSymSh=%u cSyms=%u iStrSh=%u cbStr=%u rc=%Rrc cbImage=%#zx LinkAddress=" FMT_ELF_ADDR "\n",
2007	pModElf->iSymSh, pModElf->cSyms, pModElf->iStrSh, pModElf->cbStr, rc,
2008	pModElf->cbImage, pModElf->LinkAddress));
2009	if (RT_SUCCESS(rc))
2010	{
2011	pModElf->Core.pOps = &RTLDRELF_MID(s_rtldrElf,Ops);
2012	pModElf->Core.eState = LDR_STATE_OPENED;
2013	*phLdrMod = &pModElf->Core;
2014
2015	LogFlow(("%s: %s: returns VINF_SUCCESS phLdrMod=%p\n", __FUNCTION__, pszLogName, phLdrMod));
2016	return VINF_SUCCESS;
2017	}
2018	}
2019
2020	RTMemFree(paShdrs);
2021	}
2022	else
2023	rc = VERR_NO_MEMORY;
2024	}
2025
2026	RTMemFree(pModElf);
2027	LogFlow(("%s: returns %Rrc\n", __FUNCTION__, rc));
2028	return rc;
2029	}
2030
2031
2032
2033
2034	/*******************************************************************************
2035	* Cleanup Constants And Macros *
2036	*******************************************************************************/
2037	#undef RTLDRELF_NAME
2038	#undef RTLDRELF_SUFF
2039	#undef RTLDRELF_MID
2040
2041	#undef FMT_ELF_ADDR
2042	#undef FMT_ELF_HALF
2043	#undef FMT_ELF_SHALF
2044	#undef FMT_ELF_OFF
2045	#undef FMT_ELF_SIZE
2046	#undef FMT_ELF_SWORD
2047	#undef FMT_ELF_WORD
2048	#undef FMT_ELF_XWORD
2049	#undef FMT_ELF_SXWORD
2050
2051	#undef Elf_Ehdr
2052	#undef Elf_Phdr
2053	#undef Elf_Shdr
2054	#undef Elf_Sym
2055	#undef Elf_Rel
2056	#undef Elf_Rela
2057	#undef Elf_Reloc
2058	#undef Elf_Nhdr
2059	#undef Elf_Dyn
2060
2061	#undef Elf_Addr
2062	#undef Elf_Half
2063	#undef Elf_Off
2064	#undef Elf_Size
2065	#undef Elf_Sword
2066	#undef Elf_Word
2067
2068	#undef RTLDRMODELF
2069	#undef PRTLDRMODELF
2070
2071	#undef ELF_R_SYM
2072	#undef ELF_R_TYPE
2073	#undef ELF_R_INFO
2074
2075	#undef ELF_ST_BIND
2076

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source: vbox/trunk/src/VBox/Runtime/common/ldr/ldrELFRelocatable.cpp.h@ 74762

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