dbgmodcodeview.cpp@ 58171

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1	/* $Id: dbgmodcodeview.cpp 58171 2015-10-12 09:30:58Z vboxsync $ */
2	/** @file
3	* IPRT - Debug Module Reader For Microsoft CodeView and COFF.
4	*
5	* Based on the following documentation (plus guess work and googling):
6	*
7	* - "Tools Interface Standard (TIS) Formats Specification for Windows",
8	* dated February 1993, version 1.0.
9	*
10	* - "Visual C++ 5.0 Symbolic Debug Information Specification" chapter of
11	* SPECS.CHM from MSDN Library October 2001.
12	*
13	* - "High Level Languages Debug Table Documentation", aka HLLDBG.HTML, aka
14	* IBMHLL.HTML, last changed 1996-07-08.
15	*
16	* Testcases using RTLdrFlt:
17	* - VBoxPcBios.sym at 0xf0000.
18	* - NT4 kernel PE image (coff syms).
19	*/
20
21	/*
22	* Copyright (C) 2013-2015 Oracle Corporation
23	*
24	* This file is part of VirtualBox Open Source Edition (OSE), as
25	* available from http://www.virtualbox.org. This file is free software;
26	* you can redistribute it and/or modify it under the terms of the GNU
27	* General Public License (GPL) as published by the Free Software
28	* Foundation, in version 2 as it comes in the "COPYING" file of the
29	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
30	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
31	*
32	* The contents of this file may alternatively be used under the terms
33	* of the Common Development and Distribution License Version 1.0
34	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
35	* VirtualBox OSE distribution, in which case the provisions of the
36	* CDDL are applicable instead of those of the GPL.
37	*
38	* You may elect to license modified versions of this file under the
39	* terms and conditions of either the GPL or the CDDL or both.
40	*/
41
42
43	/*********************************************************************************************************************************
44	* Header Files *
45	*********************************************************************************************************************************/
46	#define LOG_GROUP RTLOGGROUP_DBG
47	#include <iprt/dbg.h>
48	#include "internal/iprt.h"
49
50	#include <iprt/alloca.h>
51	#include <iprt/asm.h>
52	#include <iprt/assert.h>
53	#include <iprt/err.h>
54	#include <iprt/file.h>
55	#include <iprt/log.h>
56	#include <iprt/mem.h>
57	#include <iprt/param.h>
58	#include <iprt/path.h>
59	#include <iprt/string.h>
60	#include <iprt/strcache.h>
61	#include "internal/dbgmod.h"
62	#include "internal/ldrPE.h"
63	#include "internal/magics.h"
64
65
66	/*********************************************************************************************************************************
67	* Structures and Typedefs *
68	*********************************************************************************************************************************/
69	/**
70	* CodeView Header. There are two of this, base header at the start of the debug
71	* information and a trailing header at the end.
72	*/
73	typedef struct RTCVHDR
74	{
75	/** The magic ('NBxx'), see RTCVHDR_MAGIC_XXX. */
76	uint32_t u32Magic;
77	/**
78	* Base header: Subsection directory offset relative to this header (start).
79	* Trailing header: Offset of the base header relative to the end of the file.
80	*
81	* Called lfoBase, lfaBase, lfoDirectory, lfoDir and probably other things in
82	* the various specs/docs available. */
83	uint32_t off;
84	} RTCVHDR;
85	/** Pointer to a CodeView header. */
86	typedef RTCVHDR *PRTCVHDR;
87
88	/** @name CodeView magic values (RTCVHDR::u32Magic).
89	* @{ */
90	/** CodeView from Visual C++ 5.0. Specified in the 2001 MSDN specs.chm file. */
91	#define RTCVHDR_MAGIC_NB11 RT_MAKE_U32_FROM_U8('N', 'B', '1', '1')
92	/** External PDB reference (often referred to as PDB 2.0). */
93	#define RTCVHDR_MAGIC_NB10 RT_MAKE_U32_FROM_U8('N', 'B', '1', '0')
94	/** CodeView v4.10, packed. Specified in the TIS document. */
95	#define RTCVHDR_MAGIC_NB09 RT_MAKE_U32_FROM_U8('N', 'B', '0', '9')
96	/** CodeView v4.00 thru v4.05. Specified in the TIS document? */
97	#define RTCVHDR_MAGIC_NB08 RT_MAKE_U32_FROM_U8('N', 'B', '0', '8')
98	/** Quick C for Windows 1.0 debug info. */
99	#define RTCVHDR_MAGIC_NB07 RT_MAKE_U32_FROM_U8('N', 'B', '0', '7')
100	/** Emitted by ILINK indicating incremental link. Comparable to NB05? */
101	#define RTCVHDR_MAGIC_NB06 RT_MAKE_U32_FROM_U8('N', 'B', '0', '6')
102	/** Emitted by LINK version 5.20 and later before packing. */
103	#define RTCVHDR_MAGIC_NB05 RT_MAKE_U32_FROM_U8('N', 'B', '0', '5')
104	/** Emitted by IBM ILINK for HLL (similar to NB02 in many ways). */
105	#define RTCVHDR_MAGIC_NB04 RT_MAKE_U32_FROM_U8('N', 'B', '0', '4')
106	/** Emitted by LINK version 5.10 (or similar OMF linkers), as shipped with
107	* Microsoft C v6.0 for example. More or less entirely 16-bit. */
108	#define RTCVHDR_MAGIC_NB02 RT_MAKE_U32_FROM_U8('N', 'B', '0', '2')
109	/* No idea what NB03 might have been. */
110	/** AIX debugger format according to "IBM OS/2 16/32-bit Object Module Format
111	* (OMF) and Linear eXecutable Module Format (LX)" revision 10 (LXOMF.PDF). */
112	#define RTCVHDR_MAGIC_NB01 RT_MAKE_U32_FROM_U8('N', 'B', '0', '1')
113	/** Ancient CodeView format according to LXOMF.PDF. */
114	#define RTCVHDR_MAGIC_NB00 RT_MAKE_U32_FROM_U8('N', 'B', '0', '0')
115	/** @} */
116
117
118	/** @name CV directory headers.
119	* @{ */
120
121	/**
122	* Really old CV directory header used with NB00 and NB02.
123	*
124	* Uses 16-bit directory entires (RTCVDIRENT16).
125	*/
126	typedef struct RTCVDIRHDR16
127	{
128	/** The number of directory entries. */
129	uint16_t cEntries;
130	} RTCVDIRHDR16;
131	/** Pointer to a old CV directory header. */
132	typedef RTCVDIRHDR16 *PRTCVDIRHDR16;
133
134	/**
135	* Simple 32-bit CV directory base header, used by NB04 (aka IBM HLL).
136	*/
137	typedef struct RTCVDIRHDR32
138	{
139	/** The number of bytes of this header structure. */
140	uint16_t cbHdr;
141	/** The number of bytes per entry. */
142	uint16_t cbEntry;
143	/** The number of directory entries. */
144	uint32_t cEntries;
145	} RTCVDIRHDR32;
146	/** Pointer to a 32-bit CV directory header. */
147	typedef RTCVDIRHDR32 *PRTCVDIRHDR32;
148
149	/**
150	* Extended 32-bit CV directory header as specified in the TIS doc.
151	* The two extra fields seems to never have been assigned any official purpose.
152	*/
153	typedef struct RTCVDIRHDR32EX
154	{
155	/** This starts the same way as the NB04 header. */
156	RTCVDIRHDR32 Core;
157	/** Tentatively decleared as the offset to the next directory generated by
158	* the incremental linker. Haven't seen this used yet. */
159	uint32_t offNextDir;
160	/** Flags, non defined apparently, so MBZ. */
161	uint32_t fFlags;
162	} RTCVDIRHDR32EX;
163	/** Pointer to an extended 32-bit CV directory header. */
164	typedef RTCVDIRHDR32EX *PRTCVDIRHDR32EX;
165
166	/** @} */
167
168
169	/**
170	* 16-bit CV directory entry used with NB00 and NB02.
171	*/
172	typedef struct RTCVDIRENT16
173	{
174	/** Subsection type (RTCVSST). */
175	uint16_t uSubSectType;
176	/** Which module (1-based, 0xffff is special). */
177	uint16_t iMod;
178	/** The lowe offset of this subsection relative to the base CV header. */
179	uint16_t offLow;
180	/** The high part of the subsection offset. */
181	uint16_t offHigh;
182	/** The size of the subsection. */
183	uint16_t cb;
184	} RTCVDIRENT16;
185	AssertCompileSize(RTCVDIRENT16, 10);
186	/** Pointer to a 16-bit CV directory entry. */
187	typedef RTCVDIRENT16 *PRTCVDIRENT16;
188
189
190	/**
191	* 32-bit CV directory entry used starting with NB04.
192	*/
193	typedef struct RTCVDIRENT32
194	{
195	/** Subsection type (RTCVSST). */
196	uint16_t uSubSectType;
197	/** Which module (1-based, 0xffff is special). */
198	uint16_t iMod;
199	/** The offset of this subsection relative to the base CV header. */
200	uint32_t off;
201	/** The size of the subsection. */
202	uint32_t cb;
203	} RTCVDIRENT32;
204	AssertCompileSize(RTCVDIRENT32, 12);
205	/** Pointer to a 32-bit CV directory entry. */
206	typedef RTCVDIRENT32 *PRTCVDIRENT32;
207	/** Pointer to a const 32-bit CV directory entry. */
208	typedef RTCVDIRENT32 const *PCRTCVDIRENT32;
209
210
211	/**
212	* CodeView subsection types.
213	*/
214	typedef enum RTCVSST
215	{
216	/** @name NB00, NB02 and NB04 subsection types.
217	* The actual format of each subsection varies between NB04 and the others,
218	* and it may further vary in NB04 depending on the module type.
219	* @{ */
220	kCvSst_OldModule = 0x101,
221	kCvSst_OldPublic,
222	kCvSst_OldTypes,
223	kCvSst_OldSymbols,
224	kCvSst_OldSrcLines,
225	kCvSst_OldLibraries,
226	kCvSst_OldImports,
227	kCvSst_OldCompacted,
228	kCvSst_OldSrcLnSeg = 0x109,
229	kCvSst_OldSrcLines3 = 0x10b,
230	/** @} */
231
232	/** @name NB09, NB11 (and possibly NB05, NB06, NB07, and NB08) subsection types.
233	* @{ */
234	kCvSst_Module = 0x120,
235	kCvSst_Types,
236	kCvSst_Public,
237	kCvSst_PublicSym,
238	kCvSst_Symbols,
239	kCvSst_AlignSym,
240	kCvSst_SrcLnSeg,
241	kCvSst_SrcModule,
242	kCvSst_Libraries,
243	kCvSst_GlobalSym,
244	kCvSst_GlobalPub,
245	kCvSst_GlobalTypes,
246	kCvSst_MPC,
247	kCvSst_SegMap,
248	kCvSst_SegName,
249	kCvSst_PreComp,
250	kCvSst_PreCompMap,
251	kCvSst_OffsetMap16,
252	kCvSst_OffsetMap32,
253	kCvSst_FileIndex = 0x133,
254	kCvSst_StaticSym
255	/** @} */
256	} RTCVSST;
257	/** Pointer to a CV subsection type value. */
258	typedef RTCVSST *PRTCVSST;
259	/** Pointer to a const CV subsection type value. */
260	typedef RTCVSST const *PCRTCVSST;
261
262
263	/**
264	* CV4 module segment info.
265	*/
266	typedef struct RTCVMODSEGINFO32
267	{
268	/** The segment number. */
269	uint16_t iSeg;
270	/** Explicit padding. */
271	uint16_t u16Padding;
272	/** Offset into the segment. */
273	uint32_t off;
274	/** The size of the contribution. */
275	uint32_t cb;
276	} RTCVMODSEGINFO32;
277	typedef RTCVMODSEGINFO32 *PRTCVMODSEGINFO32;
278	typedef RTCVMODSEGINFO32 const *PCRTCVMODSEGINFO32;
279
280
281	/**
282	* CV4 segment map header.
283	*/
284	typedef struct RTCVSEGMAPHDR
285	{
286	/** Number of segments descriptors in the table. */
287	uint16_t cSegs;
288	/** Number of logical segment descriptors. */
289	uint16_t cLogSegs;
290	} RTCVSEGMAPHDR;
291	/** Pointer to a CV4 segment map header. */
292	typedef RTCVSEGMAPHDR *PRTCVSEGMAPHDR;
293	/** Pointer to a const CV4 segment map header. */
294	typedef RTCVSEGMAPHDR const *PCRTCVSEGMAPHDR;
295
296	/**
297	* CV4 Segment map descriptor entry.
298	*/
299	typedef struct RTCVSEGMAPDESC
300	{
301	/** Segment flags. */
302	uint16_t fFlags;
303	/** The overlay number. */
304	uint16_t iOverlay;
305	/** Group index into this segment descriptor array. 0 if not relevant.
306	* The group descriptors are found in the second half of the table. */
307	uint16_t iGroup;
308	/** Complicated. */
309	uint16_t iFrame;
310	/** Offset (byte) into the kCvSst_SegName table of the segment name, or
311	* 0xffff. */
312	uint16_t offSegName;
313	/** Offset (byte) into the kCvSst_SegName table of the class name, or 0xffff. */
314	uint16_t offClassName;
315	/** Offset into the physical segment. */
316	uint32_t off;
317	/** Size of segment. */
318	uint32_t cb;
319	} RTCVSEGMAPDESC;
320	/** Pointer to a segment map descriptor entry. */
321	typedef RTCVSEGMAPDESC *PRTCVSEGMAPDESC;
322	/** Pointer to a const segment map descriptor entry. */
323	typedef RTCVSEGMAPDESC const *PCRTCVSEGMAPDESC;
324
325	/** @name RTCVSEGMAPDESC_F_XXX - RTCVSEGMAPDESC::fFlags values.
326	* @{ */
327	#define RTCVSEGMAPDESC_F_READ UINT16_C(0x0001)
328	#define RTCVSEGMAPDESC_F_WRITE UINT16_C(0x0002)
329	#define RTCVSEGMAPDESC_F_EXECUTE UINT16_C(0x0004)
330	#define RTCVSEGMAPDESC_F_32BIT UINT16_C(0x0008)
331	#define RTCVSEGMAPDESC_F_SEL UINT16_C(0x0100)
332	#define RTCVSEGMAPDESC_F_ABS UINT16_C(0x0200)
333	#define RTCVSEGMAPDESC_F_GROUP UINT16_C(0x1000)
334	#define RTCVSEGMAPDESC_F_RESERVED UINT16_C(0xecf0)
335	/** @} */
336
337	/**
338	* CV4 segment map subsection.
339	*/
340	typedef struct RTCVSEGMAP
341	{
342	/** The header. */
343	RTCVSEGMAPHDR Hdr;
344	/** Descriptor array. */
345	RTCVSEGMAPDESC aDescs[1];
346	} RTCVSEGMAP;
347	/** Pointer to a segment map subsection. */
348	typedef RTCVSEGMAP *PRTCVSEGMAP;
349	/** Pointer to a const segment map subsection. */
350	typedef RTCVSEGMAP const *PCRTCVSEGMAP;
351
352
353	/**
354	* Global symbol table header, used by kCvSst_GlobalSym and kCvSst_GlobalPub.
355	*/
356	typedef struct RTCVGLOBALSYMTABHDR
357	{
358	/** The symbol hash function. */
359	uint16_t uSymHash;
360	/** The address hash function. */
361	uint16_t uAddrHash;
362	/** The amount of symbol information following immediately after the header. */
363	uint32_t cbSymbols;
364	/** The amount of symbol hash tables following the symbols. */
365	uint32_t cbSymHash;
366	/** The amount of address hash tables following the symbol hash tables. */
367	uint32_t cbAddrHash;
368	} RTCVGLOBALSYMTABHDR;
369	/** Pointer to a global symbol table header. */
370	typedef RTCVGLOBALSYMTABHDR *PRTCVGLOBALSYMTABHDR;
371	/** Pointer to a const global symbol table header. */
372	typedef RTCVGLOBALSYMTABHDR const *PCRTCVGLOBALSYMTABHDR;
373
374
375	typedef enum RTCVSYMTYPE
376	{
377	/** @name Symbols that doesn't change with compilation model or target machine.
378	* @{ */
379	kCvSymType_Compile = 0x0001,
380	kCvSymType_Register,
381	kCvSymType_Constant,
382	kCvSymType_UDT,
383	kCvSymType_SSearch,
384	kCvSymType_End,
385	kCvSymType_Skip,
386	kCvSymType_CVReserve,
387	kCvSymType_ObjName,
388	kCvSymType_EndArg,
389	kCvSymType_CobolUDT,
390	kCvSymType_ManyReg,
391	kCvSymType_Return,
392	kCvSymType_EntryThis,
393	/** @} */
394
395	/** @name Symbols with 16:16 addresses.
396	* @{ */
397	kCvSymType_BpRel16 = 0x0100,
398	kCvSymType_LData16,
399	kCvSymType_GData16,
400	kCvSymType_Pub16,
401	kCvSymType_LProc16,
402	kCvSymType_GProc16,
403	kCvSymType_Thunk16,
404	kCvSymType_BLock16,
405	kCvSymType_With16,
406	kCvSymType_Label16,
407	kCvSymType_CExModel16,
408	kCvSymType_VftPath16,
409	kCvSymType_RegRel16,
410	/** @} */
411
412	/** @name Symbols with 16:32 addresses.
413	* @{ */
414	kCvSymType_BpRel32 = 0x0200,
415	kCvSymType_LData32,
416	kCvSymType_GData32,
417	kCvSymType_Pub32,
418	kCvSymType_LProc32,
419	kCvSymType_GProc32,
420	kCvSymType_Thunk32,
421	kCvSymType_Block32,
422	kCvSymType_With32,
423	kCvSymType_Label32,
424	kCvSymType_CExModel32,
425	kCvSymType_VftPath32,
426	kCvSymType_RegRel32,
427	kCvSymType_LThread32,
428	kCvSymType_GThread32,
429	/** @} */
430
431	/** @name Symbols for MIPS.
432	* @{ */
433	kCvSymType_LProcMips = 0x0300,
434	kCvSymType_GProcMips,
435	/** @} */
436
437	/** @name Symbols for Microsoft CodeView.
438	* @{ */
439	kCvSymType_ProcRef,
440	kCvSymType_DataRef,
441	kCvSymType_Align
442	/** @} */
443	} RTCVSYMTYPE;
444	typedef RTCVSYMTYPE *PRTCVSYMTYPE;
445	typedef RTCVSYMTYPE const *PCRTCVSYMTYPE;
446
447
448	/** The $$SYMBOL table signature for CV4. */
449	#define RTCVSYMBOLS_SIGNATURE_CV4 UINT32_C(0x00000001)
450
451
452	/**
453	* Directory sorting order.
454	*/
455	typedef enum RTCVDIRORDER
456	{
457	RTCVDIRORDER_INVALID = 0,
458	/** Ordered by module. */
459	RTCVDIRORDER_BY_MOD,
460	/** Ordered by module, but 0 modules at the end. */
461	RTCVDIRORDER_BY_MOD_0,
462	/** Ordered by section, with global modules at the end. */
463	RTCVDIRORDER_BY_SST_MOD
464	} RTCVDIRORDER;
465
466
467	/**
468	* File type.
469	*/
470	typedef enum RTCVFILETYPE
471	{
472	RTCVFILETYPE_INVALID = 0,
473	/** Executable image. */
474	RTCVFILETYPE_IMAGE,
475	/** A DBG-file with a IMAGE_SEPARATE_DEBUG_HEADER. */
476	RTCVFILETYPE_DBG,
477	/** A PDB file. */
478	RTCVFILETYPE_PDB,
479	/** Some other kind of file with CV at the end. */
480	RTCVFILETYPE_OTHER_AT_END,
481	/** The end of the valid values. */
482	RTCVFILETYPE_END,
483	/** Type blowup. */
484	RTCVFILETYPE_32BIT_HACK = 0x7fffffff
485	} RTCVFILETYPE;
486
487
488	/**
489	* CodeView debug info reader instance.
490	*/
491	typedef struct RTDBGMODCV
492	{
493	/** Using a container for managing the debug info. */
494	RTDBGMOD hCnt;
495
496	/** @name Codeview details
497	* @{ */
498	/** The code view magic (used as format indicator). */
499	uint32_t u32CvMagic;
500	/** The offset of the CV debug info in the file. */
501	uint32_t offBase;
502	/** The size of the CV debug info. */
503	uint32_t cbDbgInfo;
504	/** The offset of the subsection directory (relative to offBase). */
505	uint32_t offDir;
506	/** The directory order. */
507	RTCVDIRORDER enmDirOrder;
508	/** @} */
509
510	/** @name COFF details.
511	* @{ */
512	/** Offset of the COFF header. */
513	uint32_t offCoffDbgInfo;
514	/** The size of the COFF debug info. */
515	uint32_t cbCoffDbgInfo;
516	/** The COFF debug info header. */
517	IMAGE_COFF_SYMBOLS_HEADER CoffHdr;
518	/** @} */
519
520	/** The file type. */
521	RTCVFILETYPE enmType;
522	/** The file handle (if external). */
523	RTFILE hFile;
524	/** Pointer to the module (no reference retained). */
525	PRTDBGMODINT pMod;
526
527	/** The image size, if we know it. This is 0 if we don't know it. */
528	uint32_t cbImage;
529
530	/** Indicates that we've loaded segments intot he container already. */
531	bool fHaveLoadedSegments;
532	/** Alternative address translation method for DOS frames. */
533	bool fHaveDosFrames;
534
535	/** @name Codeview Parsing state.
536	* @{ */
537	/** Number of directory entries. */
538	uint32_t cDirEnts;
539	/** The directory (converted to 32-bit). */
540	PRTCVDIRENT32 paDirEnts;
541	/** Current debugging style when parsing modules. */
542	uint16_t uCurStyle;
543	/** Current debugging style version (HLL only). */
544	uint16_t uCurStyleVer;
545
546	/** The segment map (if present). */
547	PRTCVSEGMAP pSegMap;
548	/** Segment names. */
549	char *pszzSegNames;
550	/** The size of the segment names. */
551	uint32_t cbSegNames;
552
553	/** @} */
554
555	} RTDBGMODCV;
556	/** Pointer to a codeview debug info reader instance. */
557	typedef RTDBGMODCV *PRTDBGMODCV;
558	/** Pointer to a const codeview debug info reader instance. */
559	typedef RTDBGMODCV *PCRTDBGMODCV;
560
561
562
563	/**
564	* Subsection callback.
565	*
566	* @returns IPRT status code.
567	* @param pThis The CodeView debug info reader instance.
568	* @param pvSubSect Pointer to the subsection data.
569	* @param cbSubSect The size of the subsection data.
570	* @param pDirEnt The directory entry.
571	*/
572	typedef DECLCALLBACK(int) FNDBGMODCVSUBSECTCALLBACK(PRTDBGMODCV pThis, void const *pvSubSect, size_t cbSubSect,
573	PCRTCVDIRENT32 pDirEnt);
574	/** Pointer to a subsection callback. */
575	typedef FNDBGMODCVSUBSECTCALLBACK *PFNDBGMODCVSUBSECTCALLBACK;
576
577
578
579	/*********************************************************************************************************************************
580	* Defined Constants And Macros *
581	*********************************************************************************************************************************/
582	/** Light weight assert + return w/ fixed status code. */
583	#define RTDBGMODCV_CHECK_RET_BF(a_Expr, a_LogArgs) \
584	do { \
585	if (!(a_Expr)) \
586	{ \
587	Log(("RTDbgCv: Check failed on line %d: " #a_Expr "\n", __LINE__)); \
588	Log(a_LogArgs); \
589	/return VERR_CV_BAD_FORMAT;/ \
590	} \
591	} while (0)
592
593
594	/** Light weight assert + return w/ fixed status code. */
595	#define RTDBGMODCV_CHECK_NOMSG_RET_BF(a_Expr) \
596	do { \
597	if (!(a_Expr)) \
598	{ \
599	Log(("RTDbgCv: Check failed on line %d: " #a_Expr "\n", __LINE__)); \
600	/return VERR_CV_BAD_FORMAT;/ \
601	} \
602	} while (0)
603
604
605
606
607
608	/**
609	* Reads CodeView information.
610	*
611	* @returns IPRT status code.
612	* @param pThis The CodeView reader instance.
613	* @param off The offset to start reading at, relative to the
614	* CodeView base header.
615	* @param pvBuf The buffer to read into.
616	* @param cb How many bytes to read.
617	*/
618	static int rtDbgModCvReadAt(PRTDBGMODCV pThis, uint32_t off, void *pvBuf, size_t cb)
619	{
620	int rc;
621	if (pThis->hFile == NIL_RTFILE)
622	rc = pThis->pMod->pImgVt->pfnReadAt(pThis->pMod, UINT32_MAX, off + pThis->offBase, pvBuf, cb);
623	else
624	rc = RTFileReadAt(pThis->hFile, off + pThis->offBase, pvBuf, cb, NULL);
625	return rc;
626	}
627
628
629	/**
630	* Reads CodeView information into an allocated buffer.
631	*
632	* @returns IPRT status code.
633	* @param pThis The CodeView reader instance.
634	* @param off The offset to start reading at, relative to the
635	* CodeView base header.
636	* @param ppvBuf Where to return the allocated buffer on success.
637	* @param cb How many bytes to read.
638	*/
639	static int rtDbgModCvReadAtAlloc(PRTDBGMODCV pThis, uint32_t off, void **ppvBuf, size_t cb)
640	{
641	int rc;
642	void pvBuf = ppvBuf = RTMemAlloc(cb);
643	if (pvBuf)
644	{
645	if (pThis->hFile == NIL_RTFILE)
646	rc = pThis->pMod->pImgVt->pfnReadAt(pThis->pMod, UINT32_MAX, off + pThis->offBase, pvBuf, cb);
647	else
648	rc = RTFileReadAt(pThis->hFile, off + pThis->offBase, pvBuf, cb, NULL);
649	if (RT_SUCCESS(rc))
650	return VINF_SUCCESS;
651
652	RTMemFree(pvBuf);
653	*ppvBuf = NULL;
654	}
655	else
656	rc = VERR_NO_MEMORY;
657	return rc;
658	}
659
660
661	/**
662	* Gets a name string for a subsection type.
663	*
664	* @returns Section name (read only).
665	* @param uSubSectType The subsection type.
666	*/
667	static const char *rtDbgModCvGetSubSectionName(uint16_t uSubSectType)
668	{
669	switch (uSubSectType)
670	{
671	case kCvSst_OldModule: return "sstOldModule";
672	case kCvSst_OldPublic: return "sstOldPublic";
673	case kCvSst_OldTypes: return "sstOldTypes";
674	case kCvSst_OldSymbols: return "sstOldSymbols";
675	case kCvSst_OldSrcLines: return "sstOldSrcLines";
676	case kCvSst_OldLibraries: return "sstOldLibraries";
677	case kCvSst_OldImports: return "sstOldImports";
678	case kCvSst_OldCompacted: return "sstOldCompacted";
679	case kCvSst_OldSrcLnSeg: return "sstOldSrcLnSeg";
680	case kCvSst_OldSrcLines3: return "sstOldSrcLines3";
681
682	case kCvSst_Module: return "sstModule";
683	case kCvSst_Types: return "sstTypes";
684	case kCvSst_Public: return "sstPublic";
685	case kCvSst_PublicSym: return "sstPublicSym";
686	case kCvSst_Symbols: return "sstSymbols";
687	case kCvSst_AlignSym: return "sstAlignSym";
688	case kCvSst_SrcLnSeg: return "sstSrcLnSeg";
689	case kCvSst_SrcModule: return "sstSrcModule";
690	case kCvSst_Libraries: return "sstLibraries";
691	case kCvSst_GlobalSym: return "sstGlobalSym";
692	case kCvSst_GlobalPub: return "sstGlobalPub";
693	case kCvSst_GlobalTypes: return "sstGlobalTypes";
694	case kCvSst_MPC: return "sstMPC";
695	case kCvSst_SegMap: return "sstSegMap";
696	case kCvSst_SegName: return "sstSegName";
697	case kCvSst_PreComp: return "sstPreComp";
698	case kCvSst_PreCompMap: return "sstPreCompMap";
699	case kCvSst_OffsetMap16: return "sstOffsetMap16";
700	case kCvSst_OffsetMap32: return "sstOffsetMap32";
701	case kCvSst_FileIndex: return "sstFileIndex";
702	case kCvSst_StaticSym: return "sstStaticSym";
703	}
704	static char s_sz[32];
705	RTStrPrintf(s_sz, sizeof(s_sz), "Unknown%#x", uSubSectType);
706	return s_sz;
707	}
708
709
710	/**
711	* Adds a symbol to the container.
712	*
713	* @returns IPRT status code
714	* @param pThis The CodeView debug info reader instance.
715	* @param iSeg Segment number.
716	* @param off Offset into the segment
717	* @param pchName The symbol name (not necessarily terminated).
718	* @param cchName The symbol name length.
719	* @param fFlags Flags reserved for future exploits, MBZ.
720	*/
721	static int rtDbgModCvAddSymbol(PRTDBGMODCV pThis, uint32_t iSeg, uint64_t off, const char *pchName,
722	uint8_t cchName, uint32_t fFlags)
723	{
724	const char *pszName = RTStrCacheEnterN(g_hDbgModStrCache, pchName, cchName);
725	if (!pszName)
726	return VERR_NO_STR_MEMORY;
727	#if 1
728	Log2(("CV Sym: %04x:%08x %.*s\n", iSeg, off, cchName, pchName));
729	if (iSeg == 0)
730	iSeg = RTDBGSEGIDX_ABS;
731	else if (pThis->pSegMap)
732	{
733	if (pThis->fHaveDosFrames)
734	{
735	if ( iSeg > pThis->pSegMap->Hdr.cSegs
736	\|\| iSeg == 0)
737	{
738	Log(("Invalid segment index/offset %#06x:%08x for symbol %.*s\n", iSeg, off, cchName, pchName));
739	return VERR_CV_BAD_FORMAT;
740	}
741	if (off <= pThis->pSegMap->aDescs[iSeg - 1].cb + pThis->pSegMap->aDescs[iSeg - 1].off)
742	off -= pThis->pSegMap->aDescs[iSeg - 1].off;
743	else
744	{
745	/* Workaround for VGABIOS where _DATA symbols like vgafont8 are
746	reported in the VGAROM segment. */
747	uint64_t uAddrSym = off + ((uint32_t)pThis->pSegMap->aDescs[iSeg - 1].iFrame << 4);
748	uint16_t j = pThis->pSegMap->Hdr.cSegs;
749	while (j-- > 0)
750	{
751	uint64_t uAddrFirst = (uint64_t)pThis->pSegMap->aDescs[j].off
752	+ ((uint32_t)pThis->pSegMap->aDescs[j].iFrame << 4);
753	if (uAddrSym - uAddrFirst < pThis->pSegMap->aDescs[j].cb)
754	{
755	Log(("CV addr fix: %04x:%08x -> %04x:%08x\n", iSeg, off, j + 1, uAddrSym - uAddrFirst));
756	off = uAddrSym - uAddrFirst;
757	iSeg = j + 1;
758	break;
759	}
760	}
761	if (j == UINT16_MAX)
762	{
763	Log(("Invalid segment index/offset %#06x:%08x for symbol %.*s [2]\n", iSeg, off, cchName, pchName));
764	return VERR_CV_BAD_FORMAT;
765	}
766	}
767	}
768	else
769	{
770	if ( iSeg > pThis->pSegMap->Hdr.cSegs
771	\|\| iSeg == 0
772	\|\| off > pThis->pSegMap->aDescs[iSeg - 1].cb)
773	{
774	Log(("Invalid segment index/offset %#06x:%08x for symbol %.*s\n", iSeg, off, cchName, pchName));
775	return VERR_CV_BAD_FORMAT;
776	}
777	off += pThis->pSegMap->aDescs[iSeg - 1].off;
778	}
779	if (pThis->pSegMap->aDescs[iSeg - 1].fFlags & RTCVSEGMAPDESC_F_ABS)
780	iSeg = RTDBGSEGIDX_ABS;
781	else
782	iSeg = pThis->pSegMap->aDescs[iSeg - 1].iGroup;
783	}
784
785	int rc = RTDbgModSymbolAdd(pThis->hCnt, pszName, iSeg, off, 0, 0 /fFlags/, NULL);
786	Log(("Symbol: %04x:%08x %.*s [%Rrc]\n", iSeg, off, cchName, pchName, rc));
787	if (rc == VERR_DBG_ADDRESS_CONFLICT \|\| rc == VERR_DBG_DUPLICATE_SYMBOL)
788	rc = VINF_SUCCESS;
789	RTStrCacheRelease(g_hDbgModStrCache, pszName);
790	return rc;
791	#else
792	Log(("Symbol: %04x:%08x %.*s\n", iSeg, off, cchName, pchName));
793	return VINF_SUCCESS;
794	#endif
795	}
796
797
798	/**
799	* Parses a CV4 symbol table, adding symbols to the container.
800	*
801	* @returns IPRT status code
802	* @param pThis The CodeView debug info reader instance.
803	* @param pvSymTab The symbol table.
804	* @param cbSymTab The size of the symbol table.
805	* @param fFlags Flags reserved for future exploits, MBZ.
806	*/
807	static int rtDbgModCvSsProcessV4SymTab(PRTDBGMODCV pThis, void const *pvSymTab, size_t cbSymTab, uint32_t fFlags)
808	{
809	int rc = VINF_SUCCESS;
810	RTCPTRUNION uCursor;
811	uCursor.pv = pvSymTab;
812
813	while (cbSymTab > 0 && RT_SUCCESS(rc))
814	{
815	uint8_t const * const pbRecStart = uCursor.pu8;
816	uint16_t cbRec = *uCursor.pu16++;
817	if (cbRec >= 2)
818	{
819	uint16_t uSymType = *uCursor.pu16++;
820
821	Log3((" %p: uSymType=%#06x LB %#x\n", pbRecStart - (uint8_t *)pvSymTab, uSymType, cbRec));
822	RTDBGMODCV_CHECK_RET_BF(cbRec >= 2 && cbRec <= cbSymTab, ("cbRec=%#x cbSymTab=%#x\n", cbRec, cbSymTab));
823
824	switch (uSymType)
825	{
826	case kCvSymType_LData16:
827	case kCvSymType_GData16:
828	case kCvSymType_Pub16:
829	{
830	RTDBGMODCV_CHECK_NOMSG_RET_BF(cbRec > 2 + 2+2+2+1);
831	uint16_t off = *uCursor.pu16++;
832	uint16_t iSeg = *uCursor.pu16++;
833	/uint16_t iType =/ *uCursor.pu16++;
834	uint8_t cchName = *uCursor.pu8++;
835	RTDBGMODCV_CHECK_NOMSG_RET_BF(cchName > 0);
836	RTDBGMODCV_CHECK_NOMSG_RET_BF(cbRec >= 2 + 2+2+2+1 + cchName);
837
838	rc = rtDbgModCvAddSymbol(pThis, iSeg, off, uCursor.pch, cchName, 0);
839	break;
840	}
841
842	case kCvSymType_LData32:
843	case kCvSymType_GData32:
844	case kCvSymType_Pub32:
845	{
846	RTDBGMODCV_CHECK_NOMSG_RET_BF(cbRec > 2 + 4+2+2+1);
847	uint32_t off = *uCursor.pu32++;
848	uint16_t iSeg = *uCursor.pu16++;
849	/uint16_t iType =/ *uCursor.pu16++;
850	uint8_t cchName = *uCursor.pu8++;
851	RTDBGMODCV_CHECK_NOMSG_RET_BF(cchName > 0);
852	RTDBGMODCV_CHECK_NOMSG_RET_BF(cbRec >= 2 + 4+2+2+1 + cchName);
853
854	rc = rtDbgModCvAddSymbol(pThis, iSeg, off, uCursor.pch, cchName, 0);
855	break;
856	}
857
858	/** @todo add GProc and LProc so we can gather sizes as well as just symbols. */
859	}
860	}
861	/else: shorter records can be used for alignment, I guess. /
862
863	/* next */
864	uCursor.pu8 = pbRecStart + cbRec + 2;
865	cbSymTab -= cbRec + 2;
866	}
867	return rc;
868	}
869
870
871	/** @callback_method_impl{FNDBGMODCVSUBSECTCALLBACK,
872	* Parses kCvSst_GlobalPub\, kCvSst_GlobalSym and kCvSst_StaticSym subsections\,
873	* adding symbols it finds to the container.} */
874	static DECLCALLBACK(int)
875	rtDbgModCvSs_GlobalPub_GlobalSym_StaticSym(PRTDBGMODCV pThis, void const *pvSubSect, size_t cbSubSect, PCRTCVDIRENT32 pDirEnt)
876	{
877	PCRTCVGLOBALSYMTABHDR pHdr = (PCRTCVGLOBALSYMTABHDR)pvSubSect;
878
879	/*
880	* Quick data validation.
881	*/
882	Log2(("RTDbgModCv: %s: uSymHash=%#x uAddrHash=%#x cbSymbols=%#x cbSymHash=%#x cbAddrHash=%#x\n",
883	rtDbgModCvGetSubSectionName(pDirEnt->uSubSectType), pHdr->uSymHash,
884	pHdr->uAddrHash, pHdr->cbSymbols, pHdr->cbSymHash, pHdr->cbAddrHash));
885	RTDBGMODCV_CHECK_NOMSG_RET_BF(cbSubSect >= sizeof(RTCVGLOBALSYMTABHDR));
886	RTDBGMODCV_CHECK_NOMSG_RET_BF((uint64_t)pHdr->cbSymbols + pHdr->cbSymHash + pHdr->cbAddrHash <= cbSubSect - sizeof(*pHdr));
887	RTDBGMODCV_CHECK_NOMSG_RET_BF(pHdr->uSymHash < 0x20);
888	RTDBGMODCV_CHECK_NOMSG_RET_BF(pHdr->uAddrHash < 0x20);
889	if (!pHdr->cbSymbols)
890	return VINF_SUCCESS;
891
892	/*
893	* Parse the symbols.
894	*/
895	return rtDbgModCvSsProcessV4SymTab(pThis, pHdr + 1, pHdr->cbSymbols, 0);
896	}
897
898
899	/** @callback_method_impl{FNDBGMODCVSUBSECTCALLBACK,
900	* Parses kCvSst_Module subsection\, storing the debugging style in pThis.} */
901	static DECLCALLBACK(int)
902	rtDbgModCvSs_Module(PRTDBGMODCV pThis, void const *pvSubSect, size_t cbSubSect, PCRTCVDIRENT32 pDirEnt)
903	{
904	RTCPTRUNION uCursor;
905	uCursor.pv = pvSubSect;
906	RTDBGMODCV_CHECK_NOMSG_RET_BF(cbSubSect >= 2 + 2 + 2 + 2 + 0 + 1);
907	uint16_t iOverlay = *uCursor.pu16++;
908	uint16_t iLib = *uCursor.pu16++;
909	uint16_t cSegs = *uCursor.pu16++;
910	pThis->uCurStyle = *uCursor.pu16++;
911	if (pThis->uCurStyle == 0)
912	pThis->uCurStyle = RT_MAKE_U16('C', 'V');
913	pThis->uCurStyleVer = 0;
914	uint8_t cchName = uCursor.pu8[cSegs * 12];
915	RTDBGMODCV_CHECK_NOMSG_RET_BF(cbSubSect >= 2 + 2 + 2 + 2 + cSegs * 12U + 1 + cchName);
916
917	const char pchName = (const char )&uCursor.pu8[cSegs * 12 + 1];
918	Log2(("RTDbgModCv: Module: iOverlay=%#x iLib=%#x cSegs=%#x Style=%c%c (%#x) %.*s\n", iOverlay, iLib, cSegs,
919	RT_BYTE1(pThis->uCurStyle), RT_BYTE2(pThis->uCurStyle), pThis->uCurStyle, cchName, pchName));
920	RTDBGMODCV_CHECK_NOMSG_RET_BF(pThis->uCurStyle == RT_MAKE_U16('C', 'V'));
921
922	PCRTCVMODSEGINFO32 paSegs = (PCRTCVMODSEGINFO32)uCursor.pv;
923	for (uint16_t iSeg = 0; iSeg < cSegs; iSeg++)
924	Log2((" #%02u: %04x:%08x LB %08x\n", iSeg, paSegs[iSeg].iSeg, paSegs[iSeg].off, paSegs[iSeg].cb));
925
926	return VINF_SUCCESS;
927	}
928
929
930	/** @callback_method_impl{FNDBGMODCVSUBSECTCALLBACK,
931	* Parses kCvSst_Symbols\, kCvSst_PublicSym and kCvSst_AlignSym subsections\,
932	* adding symbols it finds to the container.} */
933	static DECLCALLBACK(int)
934	rtDbgModCvSs_Symbols_PublicSym_AlignSym(PRTDBGMODCV pThis, void const *pvSubSect, size_t cbSubSect, PCRTCVDIRENT32 pDirEnt)
935	{
936	RTDBGMODCV_CHECK_NOMSG_RET_BF(pThis->uCurStyle == RT_MAKE_U16('C', 'V'));
937	RTDBGMODCV_CHECK_NOMSG_RET_BF(cbSubSect >= 8);
938
939	uint32_t u32Signature = (uint32_t const )pvSubSect;
940	RTDBGMODCV_CHECK_RET_BF(u32Signature == RTCVSYMBOLS_SIGNATURE_CV4,
941	("%#x, expected %#x\n", u32Signature, RTCVSYMBOLS_SIGNATURE_CV4));
942
943	return rtDbgModCvSsProcessV4SymTab(pThis, (uint8_t const *)pvSubSect + 4, cbSubSect - 4, 0);
944	}
945
946
947	static int rtDbgModCvLoadSegmentMap(PRTDBGMODCV pThis)
948	{
949	/*
950	* Search for the segment map and segment names. They will be at the end of the directory.
951	*/
952	uint32_t iSegMap = UINT32_MAX;
953	uint32_t iSegNames = UINT32_MAX;
954	uint32_t i = pThis->cDirEnts;
955	while (i-- > 0)
956	{
957	if ( pThis->paDirEnts[i].iMod != 0xffff
958	&& pThis->paDirEnts[i].iMod != 0x0000)
959	break;
960	if (pThis->paDirEnts[i].uSubSectType == kCvSst_SegMap)
961	iSegMap = i;
962	else if (pThis->paDirEnts[i].uSubSectType == kCvSst_SegName)
963	iSegNames = i;
964	}
965	if (iSegMap == UINT32_MAX)
966	{
967	Log(("RTDbgModCv: No segment map present, using segment indexes as is then...\n"));
968	return VINF_SUCCESS;
969	}
970	RTDBGMODCV_CHECK_RET_BF(pThis->paDirEnts[iSegMap].cb >= sizeof(RTCVSEGMAPHDR),
971	("Bad sstSegMap entry: cb=%#x\n", pThis->paDirEnts[iSegMap].cb));
972	RTDBGMODCV_CHECK_NOMSG_RET_BF(iSegNames == UINT32_MAX \|\| pThis->paDirEnts[iSegNames].cb > 0);
973
974	/*
975	* Read them into memory.
976	*/
977	int rc = rtDbgModCvReadAtAlloc(pThis, pThis->paDirEnts[iSegMap].off, (void **)&pThis->pSegMap,
978	pThis->paDirEnts[iSegMap].cb);
979	if (iSegNames != UINT32_MAX && RT_SUCCESS(rc))
980	{
981	pThis->cbSegNames = pThis->paDirEnts[iSegNames].cb;
982	rc = rtDbgModCvReadAtAlloc(pThis, pThis->paDirEnts[iSegNames].off, (void **)&pThis->pszzSegNames,
983	pThis->paDirEnts[iSegNames].cb);
984	}
985	if (RT_FAILURE(rc))
986	return rc;
987	RTDBGMODCV_CHECK_NOMSG_RET_BF(!pThis->pszzSegNames \|\| !pThis->pszzSegNames[pThis->cbSegNames - 1]); /* must be terminated */
988
989	/* Use local pointers to avoid lots of indirection and typing. */
990	PCRTCVSEGMAPHDR pHdr = &pThis->pSegMap->Hdr;
991	PRTCVSEGMAPDESC paDescs = &pThis->pSegMap->aDescs[0];
992
993	/*
994	* If there are only logical segments, assume a direct mapping.
995	* PE images, like the NT4 kernel, does it like this.
996	*/
997	bool const fNoGroups = pHdr->cSegs == pHdr->cLogSegs;
998
999	/*
1000	* The PE image has an extra section/segment for the headers, the others
1001	* doesn't. PE images doesn't have DOS frames. So, figure the image type now.
1002	*/
1003	RTLDRFMT enmImgFmt = RTLDRFMT_INVALID;
1004	if (pThis->pMod->pImgVt)
1005	enmImgFmt = pThis->pMod->pImgVt->pfnGetFormat(pThis->pMod);
1006
1007	/*
1008	* Validate and display it all.
1009	*/
1010	Log2(("RTDbgModCv: SegMap: cSegs=%#x cLogSegs=%#x (cbSegNames=%#x)\n", pHdr->cSegs, pHdr->cLogSegs, pThis->cbSegNames));
1011	RTDBGMODCV_CHECK_RET_BF(pThis->paDirEnts[iSegMap].cb >= sizeof(pHdr) + pHdr->cSegs sizeof(paDescs[0]),
1012	("SegMap is out of bounds: cbSubSect=%#x cSegs=%#x\n", pThis->paDirEnts[iSegMap].cb, pHdr->cSegs));
1013	RTDBGMODCV_CHECK_NOMSG_RET_BF(pHdr->cSegs >= pHdr->cLogSegs);
1014
1015	Log2(("Logical segment descriptors: %u\n", pHdr->cLogSegs));
1016
1017	bool fHaveDosFrames = false;
1018	for (i = 0; i < pHdr->cSegs; i++)
1019	{
1020	if (i == pHdr->cLogSegs)
1021	Log2(("Group/Physical descriptors: %u\n", pHdr->cSegs - pHdr->cLogSegs));
1022	uint16_t idx = i < pHdr->cLogSegs ? i : i - pHdr->cLogSegs;
1023	char szFlags[16];
1024	memset(szFlags, '-', sizeof(szFlags));
1025	if (paDescs[i].fFlags & RTCVSEGMAPDESC_F_READ)
1026	szFlags[0] = 'R';
1027	if (paDescs[i].fFlags & RTCVSEGMAPDESC_F_WRITE)
1028	szFlags[1] = 'W';
1029	if (paDescs[i].fFlags & RTCVSEGMAPDESC_F_EXECUTE)
1030	szFlags[2] = 'X';
1031	if (paDescs[i].fFlags & RTCVSEGMAPDESC_F_32BIT)
1032	szFlags[3] = '3', szFlags[4] = '2';
1033	if (paDescs[i].fFlags & RTCVSEGMAPDESC_F_SEL)
1034	szFlags[5] = 'S';
1035	if (paDescs[i].fFlags & RTCVSEGMAPDESC_F_ABS)
1036	szFlags[6] = 'A';
1037	if (paDescs[i].fFlags & RTCVSEGMAPDESC_F_GROUP)
1038	szFlags[7] = 'G';
1039	szFlags[8] = '\0';
1040	if (paDescs[i].fFlags & RTCVSEGMAPDESC_F_RESERVED)
1041	szFlags[8] = '!', szFlags[9] = '\0';
1042	Log2((" #%02u: %#010x LB %#010x flags=%#06x ovl=%#06x group=%#06x frame=%#06x iSegName=%#06x iClassName=%#06x %s\n",
1043	idx, paDescs[i].off, paDescs[i].cb, paDescs[i].fFlags, paDescs[i].iOverlay, paDescs[i].iGroup,
1044	paDescs[i].iFrame, paDescs[i].offSegName, paDescs[i].offClassName, szFlags));
1045
1046	RTDBGMODCV_CHECK_NOMSG_RET_BF(paDescs[i].offSegName == UINT16_MAX \|\| paDescs[i].offSegName < pThis->cbSegNames);
1047	RTDBGMODCV_CHECK_NOMSG_RET_BF(paDescs[i].offClassName == UINT16_MAX \|\| paDescs[i].offClassName < pThis->cbSegNames);
1048	const char *pszName = paDescs[i].offSegName != UINT16_MAX
1049	? pThis->pszzSegNames + paDescs[i].offSegName
1050	: NULL;
1051	const char *pszClass = paDescs[i].offClassName != UINT16_MAX
1052	? pThis->pszzSegNames + paDescs[i].offClassName
1053	: NULL;
1054	if (pszName \|\| pszClass)
1055	Log2((" pszName=%s pszClass=%s\n", pszName, pszClass));
1056
1057	/* Validate the group link. */
1058	RTDBGMODCV_CHECK_NOMSG_RET_BF(paDescs[i].iGroup == 0 \|\| !(paDescs[i].fFlags & RTCVSEGMAPDESC_F_GROUP));
1059	RTDBGMODCV_CHECK_NOMSG_RET_BF( paDescs[i].iGroup == 0
1060	\|\| ( paDescs[i].iGroup >= pHdr->cLogSegs
1061	&& paDescs[i].iGroup < pHdr->cSegs));
1062	RTDBGMODCV_CHECK_NOMSG_RET_BF( paDescs[i].iGroup == 0
1063	\|\| (paDescs[paDescs[i].iGroup].fFlags & RTCVSEGMAPDESC_F_GROUP));
1064	RTDBGMODCV_CHECK_NOMSG_RET_BF(!(paDescs[i].fFlags & RTCVSEGMAPDESC_F_GROUP) \|\| paDescs[i].off == 0); /* assumed below */
1065
1066	if (fNoGroups)
1067	{
1068	RTDBGMODCV_CHECK_NOMSG_RET_BF(paDescs[i].iGroup == 0);
1069	if ( !fHaveDosFrames
1070	&& paDescs[i].iFrame != 0
1071	&& (paDescs[i].fFlags & (RTCVSEGMAPDESC_F_SEL \| RTCVSEGMAPDESC_F_ABS))
1072	&& paDescs[i].iOverlay == 0
1073	&& enmImgFmt != RTLDRFMT_PE
1074	&& pThis->enmType != RTCVFILETYPE_DBG)
1075	fHaveDosFrames = true; /* BIOS, only groups with frames. */
1076	}
1077	}
1078
1079	/*
1080	* Further valiations based on fHaveDosFrames or not.
1081	*/
1082	if (fNoGroups)
1083	{
1084	if (fHaveDosFrames)
1085	for (i = 0; i < pHdr->cSegs; i++)
1086	{
1087	RTDBGMODCV_CHECK_NOMSG_RET_BF(paDescs[i].iOverlay == 0);
1088	RTDBGMODCV_CHECK_NOMSG_RET_BF( (paDescs[i].fFlags & (RTCVSEGMAPDESC_F_SEL \| RTCVSEGMAPDESC_F_ABS))
1089	== RTCVSEGMAPDESC_F_SEL
1090	\|\| (paDescs[i].fFlags & (RTCVSEGMAPDESC_F_SEL \| RTCVSEGMAPDESC_F_ABS))
1091	== RTCVSEGMAPDESC_F_ABS);
1092	RTDBGMODCV_CHECK_NOMSG_RET_BF(!(paDescs[i].fFlags & RTCVSEGMAPDESC_F_ABS));
1093	}
1094	else
1095	for (i = 0; i < pHdr->cSegs; i++)
1096	RTDBGMODCV_CHECK_NOMSG_RET_BF(paDescs[i].off == 0);
1097	}
1098
1099	/*
1100	* Modify the groups index to be the loader segment index instead, also
1101	* add the segments to the container if we haven't done that already.
1102	*/
1103
1104	/* Guess work: Group can be implicit if used. Observed Visual C++ v1.5,
1105	omitting the CODE group. */
1106	const char *pszGroup0 = NULL;
1107	uint64_t cbGroup0 = 0;
1108	if (!fNoGroups && !fHaveDosFrames)
1109	{
1110	for (i = 0; i < pHdr->cSegs; i++)
1111	if ( !(paDescs[i].fFlags & (RTCVSEGMAPDESC_F_GROUP \| RTCVSEGMAPDESC_F_ABS))
1112	&& paDescs[i].iGroup == 0)
1113	{
1114	if (pszGroup0 == NULL && paDescs[i].offClassName != UINT16_MAX)
1115	pszGroup0 = pThis->pszzSegNames + paDescs[i].offClassName;
1116	uint64_t offEnd = (uint64_t)paDescs[i].off + paDescs[i].cb;
1117	if (offEnd > cbGroup0)
1118	cbGroup0 = offEnd;
1119	}
1120	}
1121
1122	/* Add the segments.
1123	Note! The RVAs derived from this exercise are all wrong. :-/
1124	Note! We don't have an image loader, so we cannot add any fake sections. */
1125	/** @todo Try see if we can figure something out from the frame value later. */
1126	if (!pThis->fHaveLoadedSegments)
1127	{
1128	uint16_t iSeg = 0;
1129	if (!fHaveDosFrames)
1130	{
1131	Assert(!pThis->pMod->pImgVt); Assert(pThis->enmType != RTCVFILETYPE_DBG);
1132	uint64_t uRva = 0;
1133	if (cbGroup0 && !fNoGroups)
1134	{
1135	rc = RTDbgModSegmentAdd(pThis->hCnt, 0, cbGroup0, pszGroup0 ? pszGroup0 : "Seg00", 0 /fFlags/, NULL);
1136	uRva += cbGroup0;
1137	iSeg++;
1138	}
1139
1140	for (i = 0; RT_SUCCESS(rc) && i < pHdr->cSegs; i++)
1141	if ((paDescs[i].fFlags & RTCVSEGMAPDESC_F_GROUP) \|\| fNoGroups)
1142	{
1143	char szName[16];
1144	char *pszName = szName;
1145	if (paDescs[i].offSegName != UINT16_MAX)
1146	pszName = pThis->pszzSegNames + paDescs[i].offSegName;
1147	else
1148	RTStrPrintf(szName, sizeof(szName), "Seg%02u", iSeg);
1149	rc = RTDbgModSegmentAdd(pThis->hCnt, uRva, paDescs[i].cb, pszName, 0 /fFlags/, NULL);
1150	uRva += paDescs[i].cb;
1151	iSeg++;
1152	}
1153	}
1154	else
1155	{
1156	/* The map is not sorted by RVA, very annoying, but I'm countering
1157	by being lazy and slow about it. :-) Btw. this is the BIOS case. */
1158	Assert(fNoGroups);
1159	#if 1 /** @todo need more inputs */
1160
1161	/* Figure image base address. */
1162	uint64_t uImageBase = UINT64_MAX;
1163	for (i = 0; RT_SUCCESS(rc) && i < pHdr->cSegs; i++)
1164	{
1165	uint64_t uAddr = (uint64_t)paDescs[i].off + ((uint32_t)paDescs[i].iFrame << 4);
1166	if (uAddr < uImageBase)
1167	uImageBase = uAddr;
1168	}
1169
1170	/* Add the segments. */
1171	uint64_t uMinAddr = uImageBase;
1172	for (i = 0; RT_SUCCESS(rc) && i < pHdr->cSegs; i++)
1173	{
1174	/* Figure out the next one. */
1175	uint16_t cOverlaps = 0;
1176	uint16_t iBest = UINT16_MAX;
1177	uint64_t uBestAddr = UINT64_MAX;
1178	for (uint16_t j = 0; j < pHdr->cSegs; j++)
1179	{
1180	uint64_t uAddr = (uint64_t)paDescs[j].off + ((uint32_t)paDescs[j].iFrame << 4);
1181	if (uAddr >= uMinAddr && uAddr < uBestAddr)
1182	{
1183	uBestAddr = uAddr;
1184	iBest = j;
1185	}
1186	else if (uAddr == uBestAddr)
1187	{
1188	cOverlaps++;
1189	if (paDescs[j].cb > paDescs[iBest].cb)
1190	{
1191	uBestAddr = uAddr;
1192	iBest = j;
1193	}
1194	}
1195	}
1196	if (iBest == UINT16_MAX && RT_SUCCESS(rc))
1197	{
1198	rc = VERR_CV_IPE;
1199	break;
1200	}
1201
1202	/* Add it. */
1203	char szName[16];
1204	char *pszName = szName;
1205	if (paDescs[iBest].offSegName != UINT16_MAX)
1206	pszName = pThis->pszzSegNames + paDescs[iBest].offSegName;
1207	else
1208	RTStrPrintf(szName, sizeof(szName), "Seg%02u", iSeg);
1209	Log(("CV: %#010x LB %#010x %s uRVA=%#010x iBest=%u cOverlaps=%u\n",
1210	uBestAddr, paDescs[iBest].cb, szName, uBestAddr - uImageBase, iBest, cOverlaps));
1211	rc = RTDbgModSegmentAdd(pThis->hCnt, uBestAddr - uImageBase, paDescs[iBest].cb, pszName, 0 /fFlags/, NULL);
1212
1213	/* Update translations. */
1214	paDescs[iBest].iGroup = iSeg;
1215	if (cOverlaps > 0)
1216	{
1217	for (uint16_t j = 0; j < pHdr->cSegs; j++)
1218	if ((uint64_t)paDescs[j].off + ((uint32_t)paDescs[j].iFrame << 4) == uBestAddr)
1219	paDescs[iBest].iGroup = iSeg;
1220	i += cOverlaps;
1221	}
1222
1223	/* Advance. */
1224	uMinAddr = uBestAddr + 1;
1225	iSeg++;
1226	}
1227
1228	pThis->fHaveDosFrames = true;
1229	#else
1230	uint32_t iFrameFirst = UINT32_MAX;
1231	uint16_t iSeg = 0;
1232	uint32_t iFrameMin = 0;
1233	do
1234	{
1235	/* Find next frame. */
1236	uint32_t iFrame = UINT32_MAX;
1237	for (uint16_t j = 0; j < pHdr->cSegs; j++)
1238	if (paDescs[j].iFrame >= iFrameMin && paDescs[j].iFrame < iFrame)
1239	iFrame = paDescs[j].iFrame;
1240	if (iFrame == UINT32_MAX)
1241	break;
1242
1243	/* Figure the frame span. */
1244	uint32_t offFirst = UINT32_MAX;
1245	uint64_t offEnd = 0;
1246	for (uint16_t j = 0; j < pHdr->cSegs; j++)
1247	if (paDescs[j].iFrame == iFrame)
1248	{
1249	uint64_t offThisEnd = paDescs[j].off + paDescs[j].cb;
1250	if (offThisEnd > offEnd)
1251	offEnd = offThisEnd;
1252	if (paDescs[j].off < offFirst)
1253	offFirst = paDescs[j].off;
1254	}
1255
1256	if (offFirst < offEnd)
1257	{
1258	/* Add it. */
1259	char szName[16];
1260	RTStrPrintf(szName, sizeof(szName), "Frame_%04x", iFrame);
1261	Log(("CV: %s offEnd=%#x offFirst=%#x\n", szName, offEnd, offFirst));
1262	if (iFrameFirst == UINT32_MAX)
1263	iFrameFirst = iFrame;
1264	rc = RTDbgModSegmentAdd(pThis->hCnt, (iFrame - iFrameFirst) << 4, offEnd, szName, 0 /fFlags/, NULL);
1265
1266	/* Translation updates. */
1267	for (uint16_t j = 0; j < pHdr->cSegs; j++)
1268	if (paDescs[j].iFrame == iFrame)
1269	{
1270	paDescs[j].iGroup = iSeg;
1271	paDescs[j].off = 0;
1272	paDescs[j].cb = offEnd > UINT32_MAX ? UINT32_MAX : (uint32_t)offEnd;
1273	}
1274
1275	iSeg++;
1276	}
1277
1278	iFrameMin = iFrame + 1;
1279	} while (RT_SUCCESS(rc));
1280	#endif
1281	}
1282
1283	if (RT_FAILURE(rc))
1284	{
1285	Log(("RTDbgModCv: %Rrc while adding segments from SegMap\n", rc));
1286	return rc;
1287	}
1288
1289	pThis->fHaveLoadedSegments = true;
1290
1291	/* Skip the stuff below if we have DOS frames since we did it all above. */
1292	if (fHaveDosFrames)
1293	return VINF_SUCCESS;
1294	}
1295
1296	/* Pass one: Fixate the group segment indexes. */
1297	uint16_t iSeg0 = enmImgFmt == RTLDRFMT_PE \|\| pThis->enmType == RTCVFILETYPE_DBG ? 1 : 0;
1298	uint16_t iSeg = iSeg0 + (cbGroup0 > 0); /** @todo probably wrong... */
1299	for (i = 0; i < pHdr->cSegs; i++)
1300	if (paDescs[i].fFlags & RTCVSEGMAPDESC_F_ABS)
1301	paDescs[i].iGroup = (uint16_t)RTDBGSEGIDX_ABS;
1302	else if ((paDescs[i].fFlags & RTCVSEGMAPDESC_F_GROUP) \|\| fNoGroups)
1303	paDescs[i].iGroup = iSeg++;
1304
1305	/* Pass two: Resolve group references in to segment indexes. */
1306	Log2(("Mapped segments (both kinds):\n"));
1307	for (i = 0; i < pHdr->cSegs; i++)
1308	{
1309	if (!fNoGroups && !(paDescs[i].fFlags & (RTCVSEGMAPDESC_F_GROUP \| RTCVSEGMAPDESC_F_ABS)))
1310	paDescs[i].iGroup = paDescs[i].iGroup == 0 ? iSeg0 : paDescs[paDescs[i].iGroup].iGroup;
1311
1312	Log2((" #%02u: %#010x LB %#010x -> %#06x (flags=%#06x ovl=%#06x frame=%#06x)\n",
1313	i, paDescs[i].off, paDescs[i].cb, paDescs[i].iGroup,
1314	paDescs[i].fFlags, paDescs[i].iOverlay, paDescs[i].iFrame));
1315	}
1316
1317	return VINF_SUCCESS;
1318	}
1319
1320
1321	/**
1322	* Loads the directory into memory (RTDBGMODCV::paDirEnts and
1323	* RTDBGMODCV::cDirEnts).
1324	*
1325	* Converting old format version into the newer format to simplifying the code
1326	* using the directory.
1327	*
1328	*
1329	* @returns IPRT status code. (May leave with paDirEnts allocated on failure.)
1330	* @param pThis The CV reader instance.
1331	*/
1332	static int rtDbgModCvLoadDirectory(PRTDBGMODCV pThis)
1333	{
1334	/*
1335	* Read in the CV directory.
1336	*/
1337	int rc;
1338	if ( pThis->u32CvMagic == RTCVHDR_MAGIC_NB00
1339	\|\| pThis->u32CvMagic == RTCVHDR_MAGIC_NB02)
1340	{
1341	/*
1342	* 16-bit type.
1343	*/
1344	RTCVDIRHDR16 DirHdr;
1345	rc = rtDbgModCvReadAt(pThis, pThis->offDir, &DirHdr, sizeof(DirHdr));
1346	if (RT_SUCCESS(rc))
1347	{
1348	if (DirHdr.cEntries > 2 && DirHdr.cEntries < _64K - 32U)
1349	{
1350	pThis->cDirEnts = DirHdr.cEntries;
1351	pThis->paDirEnts = (PRTCVDIRENT32)RTMemAlloc(DirHdr.cEntries * sizeof(pThis->paDirEnts[0]));
1352	if (pThis->paDirEnts)
1353	{
1354	rc = rtDbgModCvReadAt(pThis, pThis->offDir + sizeof(DirHdr),
1355	pThis->paDirEnts, DirHdr.cEntries * sizeof(RTCVDIRENT16));
1356	if (RT_SUCCESS(rc))
1357	{
1358	/* Convert the entries (from the end). */
1359	uint32_t cLeft = DirHdr.cEntries;
1360	RTCVDIRENT32 volatile *pDst = pThis->paDirEnts + cLeft;
1361	RTCVDIRENT16 volatile pSrc = (RTCVDIRENT16 volatile )pThis->paDirEnts + cLeft;
1362	while (cLeft--)
1363	{
1364	pDst--;
1365	pSrc--;
1366
1367	pDst->cb = pSrc->cb;
1368	pDst->off = RT_MAKE_U32(pSrc->offLow, pSrc->offHigh);
1369	pDst->iMod = pSrc->iMod;
1370	pDst->uSubSectType = pSrc->uSubSectType;
1371	}
1372	}
1373	}
1374	else
1375	rc = VERR_NO_MEMORY;
1376	}
1377	else
1378	{
1379	Log(("Old CV directory count is out of considered valid range: %#x\n", DirHdr.cEntries));
1380	rc = VERR_CV_BAD_FORMAT;
1381	}
1382	}
1383	}
1384	else
1385	{
1386	/*
1387	* 32-bit type (reading too much for NB04 is no problem).
1388	*/
1389	RTCVDIRHDR32EX DirHdr;
1390	rc = rtDbgModCvReadAt(pThis, pThis->offDir, &DirHdr, sizeof(DirHdr));
1391	if (RT_SUCCESS(rc))
1392	{
1393	if ( DirHdr.Core.cbHdr != sizeof(DirHdr.Core)
1394	&& DirHdr.Core.cbHdr != sizeof(DirHdr))
1395	{
1396	Log(("Unexpected CV directory size: %#x\n", DirHdr.Core.cbHdr));
1397	rc = VERR_CV_BAD_FORMAT;
1398	}
1399	if ( DirHdr.Core.cbHdr == sizeof(DirHdr)
1400	&& ( DirHdr.offNextDir != 0
1401	\|\| DirHdr.fFlags != 0) )
1402	{
1403	Log(("Extended CV directory headers fields are not zero: fFlags=%#x offNextDir=%#x\n",
1404	DirHdr.fFlags, DirHdr.offNextDir));
1405	rc = VERR_CV_BAD_FORMAT;
1406	}
1407	if (DirHdr.Core.cbEntry != sizeof(RTCVDIRENT32))
1408	{
1409	Log(("Unexpected CV directory entry size: %#x (expected %#x)\n", DirHdr.Core.cbEntry, sizeof(RTCVDIRENT32)));
1410	rc = VERR_CV_BAD_FORMAT;
1411	}
1412	if (DirHdr.Core.cEntries < 2 \|\| DirHdr.Core.cEntries >= _512K)
1413	{
1414	Log(("CV directory count is out of considered valid range: %#x\n", DirHdr.Core.cEntries));
1415	rc = VERR_CV_BAD_FORMAT;
1416	}
1417	if (RT_SUCCESS(rc))
1418	{
1419	pThis->cDirEnts = DirHdr.Core.cEntries;
1420	pThis->paDirEnts = (PRTCVDIRENT32)RTMemAlloc(DirHdr.Core.cEntries * sizeof(pThis->paDirEnts[0]));
1421	if (pThis->paDirEnts)
1422	rc = rtDbgModCvReadAt(pThis, pThis->offDir + DirHdr.Core.cbHdr,
1423	pThis->paDirEnts, DirHdr.Core.cEntries * sizeof(RTCVDIRENT32));
1424	else
1425	rc = VERR_NO_MEMORY;
1426	}
1427	}
1428	}
1429
1430	if (RT_SUCCESS(rc))
1431	{
1432	/*
1433	* Basic info validation and determining the directory ordering.
1434	*/
1435	bool fWatcom = 0;
1436	uint16_t cGlobalMods = 0;
1437	uint16_t cNormalMods = 0;
1438	uint16_t iModLast = 0;
1439	uint32_t const cbDbgInfo = pThis->cbDbgInfo;
1440	uint32_t const cDirEnts = pThis->cDirEnts;
1441	Log2(("RTDbgModCv: %u (%#x) directory entries:\n", cDirEnts, cDirEnts));
1442	for (uint32_t i = 0; i < cDirEnts; i++)
1443	{
1444	PCRTCVDIRENT32 pDirEnt = &pThis->paDirEnts[i];
1445	Log2((" #%04u mod=%#06x sst=%#06x at %#010x LB %#07x %s\n",
1446	i, pDirEnt->iMod, pDirEnt->uSubSectType, pDirEnt->off, pDirEnt->cb,
1447	rtDbgModCvGetSubSectionName(pDirEnt->uSubSectType)));
1448
1449	if ( pDirEnt->off >= cbDbgInfo
1450	\|\| pDirEnt->cb >= cbDbgInfo
1451	\|\| pDirEnt->off + pDirEnt->cb > cbDbgInfo)
1452	{
1453	Log(("CV directory entry #%u is out of bounds: %#x LB %#x, max %#x\n", i, pDirEnt->off, pDirEnt->cb, cbDbgInfo));
1454	rc = VERR_CV_BAD_FORMAT;
1455	}
1456	if ( pDirEnt->iMod == 0
1457	&& pThis->u32CvMagic != RTCVHDR_MAGIC_NB04
1458	&& pThis->u32CvMagic != RTCVHDR_MAGIC_NB02
1459	&& pThis->u32CvMagic != RTCVHDR_MAGIC_NB00)
1460	{
1461	Log(("CV directory entry #%u uses module index 0 (uSubSectType=%#x)\n", i, pDirEnt->uSubSectType));
1462	rc = VERR_CV_BAD_FORMAT;
1463	}
1464	if (pDirEnt->iMod == 0 \|\| pDirEnt->iMod == 0xffff)
1465	cGlobalMods++;
1466	else
1467	{
1468	if (pDirEnt->iMod > iModLast)
1469	{
1470	if ( pDirEnt->uSubSectType != kCvSst_Module
1471	&& pDirEnt->uSubSectType != kCvSst_OldModule)
1472	{
1473	Log(("CV directory entry #%u: expected module subsection first, found %s (%#x)\n",
1474	i, rtDbgModCvGetSubSectionName(pDirEnt->uSubSectType), pDirEnt->uSubSectType));
1475	rc = VERR_CV_BAD_FORMAT;
1476	}
1477	if (pDirEnt->iMod != iModLast + 1)
1478	{
1479	Log(("CV directory entry #%u: skips from mod %#x to %#x modules\n", i, iModLast, pDirEnt->iMod));
1480	rc = VERR_CV_BAD_FORMAT;
1481	}
1482	iModLast = pDirEnt->iMod;
1483	}
1484	else if (pDirEnt->iMod < iModLast)
1485	fWatcom = true;
1486	cNormalMods++;
1487	}
1488	}
1489	if (cGlobalMods == 0)
1490	{
1491	Log(("CV directory contains no global modules\n"));
1492	rc = VERR_CV_BAD_FORMAT;
1493	}
1494	if (RT_SUCCESS(rc))
1495	{
1496	if (fWatcom)
1497	pThis->enmDirOrder = RTCVDIRORDER_BY_SST_MOD;
1498	else if (pThis->paDirEnts[0].iMod == 0)
1499	pThis->enmDirOrder = RTCVDIRORDER_BY_MOD_0;
1500	else
1501	pThis->enmDirOrder = RTCVDIRORDER_BY_MOD;
1502	Log(("CV dir stats: %u total, %u normal, %u special, iModLast=%#x (%u), enmDirOrder=%d\n",
1503	cDirEnts, cNormalMods, cGlobalMods, iModLast, iModLast, pThis->enmDirOrder));
1504
1505
1506	/*
1507	* Validate the directory ordering.
1508	*/
1509	uint16_t i = 0;
1510
1511	/* Old style with special modules up front. */
1512	if (pThis->enmDirOrder == RTCVDIRORDER_BY_MOD_0)
1513	while (i < cGlobalMods)
1514	{
1515	if (pThis->paDirEnts[i].iMod != 0)
1516	{
1517	Log(("CV directory entry #%u: Expected iMod=%x instead of %x\n", i, 0, pThis->paDirEnts[i].iMod));
1518	rc = VERR_CV_BAD_FORMAT;
1519	}
1520	i++;
1521	}
1522
1523	/* Normal modules. */
1524	if (pThis->enmDirOrder != RTCVDIRORDER_BY_SST_MOD)
1525	{
1526	uint16_t iEndNormalMods = cNormalMods + (pThis->enmDirOrder == RTCVDIRORDER_BY_MOD_0 ? cGlobalMods : 0);
1527	while (i < iEndNormalMods)
1528	{
1529	if (pThis->paDirEnts[i].iMod == 0 \|\| pThis->paDirEnts[i].iMod == 0xffff)
1530	{
1531	Log(("CV directory entry #%u: Unexpected global module entry.\n", i));
1532	rc = VERR_CV_BAD_FORMAT;
1533	}
1534	i++;
1535	}
1536	}
1537	else
1538	{
1539	uint32_t fSeen = RT_BIT_32(kCvSst_Module - kCvSst_Module)
1540	\| RT_BIT_32(kCvSst_Libraries - kCvSst_Module)
1541	\| RT_BIT_32(kCvSst_GlobalSym - kCvSst_Module)
1542	\| RT_BIT_32(kCvSst_GlobalPub - kCvSst_Module)
1543	\| RT_BIT_32(kCvSst_GlobalTypes - kCvSst_Module)
1544	\| RT_BIT_32(kCvSst_SegName - kCvSst_Module)
1545	\| RT_BIT_32(kCvSst_SegMap - kCvSst_Module)
1546	\| RT_BIT_32(kCvSst_StaticSym - kCvSst_Module)
1547	\| RT_BIT_32(kCvSst_FileIndex - kCvSst_Module)
1548	\| RT_BIT_32(kCvSst_MPC - kCvSst_Module);
1549	uint16_t iMod = 0;
1550	uint16_t uSst = kCvSst_Module;
1551	while (i < cNormalMods)
1552	{
1553	PCRTCVDIRENT32 pDirEnt = &pThis->paDirEnts[i];
1554	if (pDirEnt->iMod > iMod)
1555	{
1556	if (pDirEnt->uSubSectType != uSst)
1557	{
1558	Log(("CV directory entry #%u: Expected %s (%#x), found %s (%#x).\n",
1559	i, rtDbgModCvGetSubSectionName(uSst), uSst,
1560	rtDbgModCvGetSubSectionName(pDirEnt->uSubSectType), pDirEnt->uSubSectType));
1561	rc = VERR_CV_BAD_FORMAT;
1562	}
1563	}
1564	else
1565	{
1566	uint32_t iBit = pDirEnt->uSubSectType - kCvSst_Module;
1567	if (iBit >= 32U \|\| (fSeen & RT_BIT_32(iBit)))
1568	{
1569	Log(("CV directory entry #%u: SST %s (%#x) has already been seen or is for globals.\n",
1570	i, rtDbgModCvGetSubSectionName(pDirEnt->uSubSectType), pDirEnt->uSubSectType));
1571	rc = VERR_CV_BAD_FORMAT;
1572	}
1573	fSeen \|= RT_BIT_32(iBit);
1574	}
1575
1576	uSst = pDirEnt->uSubSectType;
1577	iMod = pDirEnt->iMod;
1578	i++;
1579	}
1580	}
1581
1582	/* New style with special modules at the end. */
1583	if (pThis->enmDirOrder != RTCVDIRORDER_BY_MOD_0)
1584	while (i < cDirEnts)
1585	{
1586	if (pThis->paDirEnts[i].iMod != 0 && pThis->paDirEnts[i].iMod != 0xffff)
1587	{
1588	Log(("CV directory entry #%u: Expected global module entry, not %#x.\n", i,
1589	pThis->paDirEnts[i].iMod));
1590	rc = VERR_CV_BAD_FORMAT;
1591	}
1592	i++;
1593	}
1594	}
1595
1596	}
1597
1598	return rc;
1599	}
1600
1601
1602	static int rtDbgModCvLoadCodeViewInfo(PRTDBGMODCV pThis)
1603	{
1604	/*
1605	* Load the directory, the segment map (if any) and then scan for segments
1606	* if necessary.
1607	*/
1608	int rc = rtDbgModCvLoadDirectory(pThis);
1609	if (RT_SUCCESS(rc))
1610	rc = rtDbgModCvLoadSegmentMap(pThis);
1611	if (RT_SUCCESS(rc) && !pThis->fHaveLoadedSegments)
1612	{
1613	rc = VERR_CV_TODO; /** @todo Scan anything containing address, in particular sstSegMap and sstModule,
1614	* and reconstruct the segments from that information. */
1615	pThis->cbImage = 0x1000;
1616	rc = VINF_SUCCESS;
1617	}
1618
1619	/*
1620	* Process the directory.
1621	*/
1622	for (uint32_t i = 0; RT_SUCCESS(rc) && i < pThis->cDirEnts; i++)
1623	{
1624	PCRTCVDIRENT32 pDirEnt = &pThis->paDirEnts[i];
1625	Log3(("Processing subsection %#u %s\n", i, rtDbgModCvGetSubSectionName(pDirEnt->uSubSectType)));
1626	PFNDBGMODCVSUBSECTCALLBACK pfnCallback = NULL;
1627	switch (pDirEnt->uSubSectType)
1628	{
1629	case kCvSst_GlobalPub:
1630	case kCvSst_GlobalSym:
1631	case kCvSst_StaticSym:
1632	pfnCallback = rtDbgModCvSs_GlobalPub_GlobalSym_StaticSym;
1633	break;
1634	case kCvSst_Module:
1635	pfnCallback = rtDbgModCvSs_Module;
1636	break;
1637	case kCvSst_PublicSym:
1638	case kCvSst_Symbols:
1639	case kCvSst_AlignSym:
1640	pfnCallback = rtDbgModCvSs_Symbols_PublicSym_AlignSym;
1641	break;
1642
1643	case kCvSst_OldModule:
1644	case kCvSst_OldPublic:
1645	case kCvSst_OldTypes:
1646	case kCvSst_OldSymbols:
1647	case kCvSst_OldSrcLines:
1648	case kCvSst_OldLibraries:
1649	case kCvSst_OldImports:
1650	case kCvSst_OldCompacted:
1651	case kCvSst_OldSrcLnSeg:
1652	case kCvSst_OldSrcLines3:
1653
1654	case kCvSst_Types:
1655	case kCvSst_Public:
1656	case kCvSst_SrcLnSeg:
1657	case kCvSst_SrcModule:
1658	case kCvSst_Libraries:
1659	case kCvSst_GlobalTypes:
1660	case kCvSst_MPC:
1661	case kCvSst_PreComp:
1662	case kCvSst_PreCompMap:
1663	case kCvSst_OffsetMap16:
1664	case kCvSst_OffsetMap32:
1665	case kCvSst_FileIndex:
1666
1667	default:
1668	/** @todo implement more. */
1669	break;
1670
1671	/* Skip because we've already processed them: */
1672	case kCvSst_SegMap:
1673	case kCvSst_SegName:
1674	pfnCallback = NULL;
1675	break;
1676	}
1677
1678	if (pfnCallback)
1679	{
1680	void *pvSubSect;
1681	rc = rtDbgModCvReadAtAlloc(pThis, pDirEnt->off, &pvSubSect, pDirEnt->cb);
1682	if (RT_SUCCESS(rc))
1683	{
1684	rc = pfnCallback(pThis, pvSubSect, pDirEnt->cb, pDirEnt);
1685	RTMemFree(pvSubSect);
1686	}
1687	}
1688	}
1689
1690	return rc;
1691	}
1692
1693
1694	/*
1695	*
1696	* COFF Debug Info Parsing.
1697	* COFF Debug Info Parsing.
1698	* COFF Debug Info Parsing.
1699	*
1700	*/
1701
1702	static const char *rtDbgModCvGetCoffStorageClassName(uint8_t bStorageClass)
1703	{
1704	switch (bStorageClass)
1705	{
1706	case IMAGE_SYM_CLASS_END_OF_FUNCTION: return "END_OF_FUNCTION";
1707	case IMAGE_SYM_CLASS_NULL: return "NULL";
1708	case IMAGE_SYM_CLASS_AUTOMATIC: return "AUTOMATIC";
1709	case IMAGE_SYM_CLASS_EXTERNAL: return "EXTERNAL";
1710	case IMAGE_SYM_CLASS_STATIC: return "STATIC";
1711	case IMAGE_SYM_CLASS_REGISTER: return "REGISTER";
1712	case IMAGE_SYM_CLASS_EXTERNAL_DEF: return "EXTERNAL_DEF";
1713	case IMAGE_SYM_CLASS_LABEL: return "LABEL";
1714	case IMAGE_SYM_CLASS_UNDEFINED_LABEL: return "UNDEFINED_LABEL";
1715	case IMAGE_SYM_CLASS_MEMBER_OF_STRUCT: return "MEMBER_OF_STRUCT";
1716	case IMAGE_SYM_CLASS_ARGUMENT: return "ARGUMENT";
1717	case IMAGE_SYM_CLASS_STRUCT_TAG: return "STRUCT_TAG";
1718	case IMAGE_SYM_CLASS_MEMBER_OF_UNION: return "MEMBER_OF_UNION";
1719	case IMAGE_SYM_CLASS_UNION_TAG: return "UNION_TAG";
1720	case IMAGE_SYM_CLASS_TYPE_DEFINITION: return "TYPE_DEFINITION";
1721	case IMAGE_SYM_CLASS_UNDEFINED_STATIC: return "UNDEFINED_STATIC";
1722	case IMAGE_SYM_CLASS_ENUM_TAG: return "ENUM_TAG";
1723	case IMAGE_SYM_CLASS_MEMBER_OF_ENUM: return "MEMBER_OF_ENUM";
1724	case IMAGE_SYM_CLASS_REGISTER_PARAM: return "REGISTER_PARAM";
1725	case IMAGE_SYM_CLASS_BIT_FIELD: return "BIT_FIELD";
1726	case IMAGE_SYM_CLASS_FAR_EXTERNAL: return "FAR_EXTERNAL";
1727	case IMAGE_SYM_CLASS_BLOCK: return "BLOCK";
1728	case IMAGE_SYM_CLASS_FUNCTION: return "FUNCTION";
1729	case IMAGE_SYM_CLASS_END_OF_STRUCT: return "END_OF_STRUCT";
1730	case IMAGE_SYM_CLASS_FILE: return "FILE";
1731	case IMAGE_SYM_CLASS_SECTION: return "SECTION";
1732	case IMAGE_SYM_CLASS_WEAK_EXTERNAL: return "WEAK_EXTERNAL";
1733	case IMAGE_SYM_CLASS_CLR_TOKEN: return "CLR_TOKEN";
1734	}
1735
1736	static char s_szName[32];
1737	RTStrPrintf(s_szName, sizeof(s_szName), "Unknown%#04x", bStorageClass);
1738	return s_szName;
1739	}
1740
1741
1742	/**
1743	* Adds a chunk of COFF line numbers.
1744	*
1745	* @param pThis The COFF/CodeView reader instance.
1746	* @param pszFile The source file name.
1747	* @param iSection The section number.
1748	* @param paLines Pointer to the first line number table entry.
1749	* @param cLines The number of line number table entries to add.
1750	*/
1751	static void rtDbgModCvAddCoffLineNumbers(PRTDBGMODCV pThis, const char *pszFile, uint32_t iSection,
1752	PCIMAGE_LINENUMBER paLines, uint32_t cLines)
1753	{
1754	Log4(("Adding %u line numbers in section #%u for %s\n", cLines, iSection, pszFile));
1755	PCIMAGE_LINENUMBER pCur = paLines;
1756	while (cLines-- > 0)
1757	{
1758	if (pCur->Linenumber)
1759	{
1760	int rc = RTDbgModLineAdd(pThis->hCnt, pszFile, pCur->Linenumber, RTDBGSEGIDX_RVA, pCur->Type.VirtualAddress, NULL);
1761	Log4((" %#010x: %u [%Rrc]\n", pCur->Type.VirtualAddress, pCur->Linenumber, rc));
1762	}
1763	pCur++;
1764	}
1765	}
1766
1767
1768	/**
1769	* Adds a COFF symbol.
1770	*
1771	* @returns IPRT status (ignored)
1772	* @param pThis The COFF/CodeView reader instance.
1773	* @param idxSeg IPRT RVA or ABS segment index indicator.
1774	* @param uValue The symbol value.
1775	* @param pszName The symbol name.
1776	*/
1777	static int rtDbgModCvAddCoffSymbol(PRTDBGMODCV pThis, uint32_t idxSeg, uint32_t uValue, const char *pszName)
1778	{
1779	int rc = RTDbgModSymbolAdd(pThis->hCnt, pszName, idxSeg, uValue, 0, 0 /fFlags/, NULL);
1780	Log(("Symbol: %s:%08x %s [%Rrc]\n", idxSeg == RTDBGSEGIDX_RVA ? "rva" : "abs", uValue, pszName, rc));
1781	if (rc == VERR_DBG_ADDRESS_CONFLICT \|\| rc == VERR_DBG_DUPLICATE_SYMBOL)
1782	rc = VINF_SUCCESS;
1783	return rc;
1784	}
1785
1786
1787	/**
1788	* Processes the COFF symbol table.
1789	*
1790	* @returns IPRT status code
1791	* @param pThis The COFF/CodeView reader instance.
1792	* @param paSymbols Pointer to the symbol table.
1793	* @param cSymbols The number of entries in the symbol table.
1794	* @param paLines Pointer to the line number table.
1795	* @param cLines The number of entires in the line number table.
1796	* @param pszzStrTab Pointer to the string table.
1797	* @param cbStrTab Size of the string table.
1798	*/
1799	static int rtDbgModCvProcessCoffSymbolTable(PRTDBGMODCV pThis,
1800	PCIMAGE_SYMBOL paSymbols, uint32_t cSymbols,
1801	PCIMAGE_LINENUMBER paLines, uint32_t cLines,
1802	const char *pszzStrTab, uint32_t cbStrTab)
1803	{
1804	Log3(("Processing COFF symbol table with %#x symbols\n", cSymbols));
1805
1806	/*
1807	* Making some bold assumption that the line numbers for the section in
1808	* the file are allocated sequentially, we do multiple passes until we've
1809	* gathered them all.
1810	*/
1811	int rc = VINF_SUCCESS;
1812	uint32_t cSections = 1;
1813	uint32_t iLineSect = 1;
1814	uint32_t iLine = 0;
1815	do
1816	{
1817	/*
1818	* Process the symbols.
1819	*/
1820	char szShort[9];
1821	char szFile[RTPATH_MAX];
1822	uint32_t iSymbol = 0;
1823	szFile[0] = '\0';
1824	szShort[8] = '\0'; /* avoid having to terminate it all the time. */
1825
1826	while (iSymbol < cSymbols && RT_SUCCESS(rc))
1827	{
1828	/* Copy the symbol in and hope it works around the misalignment
1829	issues everywhere. */
1830	IMAGE_SYMBOL Sym;
1831	memcpy(&Sym, &paSymbols[iSymbol], sizeof(Sym));
1832	RTDBGMODCV_CHECK_NOMSG_RET_BF(Sym.NumberOfAuxSymbols < cSymbols);
1833
1834	/* Calc a zero terminated symbol name. */
1835	const char *pszName;
1836	if (Sym.N.Name.Short)
1837	pszName = (const char *)memcpy(szShort, &Sym.N, 8);
1838	else
1839	{
1840	RTDBGMODCV_CHECK_NOMSG_RET_BF(Sym.N.Name.Long < cbStrTab);
1841	pszName = pszzStrTab + Sym.N.Name.Long;
1842	}
1843
1844	/* Only log stuff and count sections the in the first pass.*/
1845	if (iLineSect == 1)
1846	{
1847	Log3(("%04x: s=%#06x v=%#010x t=%#06x a=%#04x c=%#04x (%s) name='%s'\n",
1848	iSymbol, Sym.SectionNumber, Sym.Value, Sym.Type, Sym.NumberOfAuxSymbols,
1849	Sym.StorageClass, rtDbgModCvGetCoffStorageClassName(Sym.StorageClass), pszName));
1850	if ((int16_t)cSections <= Sym.SectionNumber && Sym.SectionNumber > 0)
1851	cSections = Sym.SectionNumber + 1;
1852	}
1853
1854	/*
1855	* Use storage class to pick what we need (which isn't much because,
1856	* MS only provides a very restricted set of symbols).
1857	*/
1858	IMAGE_AUX_SYMBOL Aux;
1859	switch (Sym.StorageClass)
1860	{
1861	case IMAGE_SYM_CLASS_NULL:
1862	/* a NOP */
1863	break;
1864
1865	case IMAGE_SYM_CLASS_FILE:
1866	{
1867	/* Change the current file name (for line numbers). Pretend
1868	ANSI and ISO-8859-1 are similar enough for out purposes... */
1869	RTDBGMODCV_CHECK_NOMSG_RET_BF(Sym.NumberOfAuxSymbols > 0);
1870	const char pszFile = (const char )&paSymbols[iSymbol + 1];
1871	char *pszDst = szFile;
1872	rc = RTLatin1ToUtf8Ex(pszFile, Sym.NumberOfAuxSymbols * sizeof(IMAGE_SYMBOL), &pszDst, sizeof(szFile), NULL);
1873	if (RT_FAILURE(rc))
1874	Log(("Error converting COFF filename: %Rrc\n", rc));
1875	else if (iLineSect == 1)
1876	Log3((" filename='%s'\n", szFile));
1877	break;
1878	}
1879
1880	case IMAGE_SYM_CLASS_STATIC:
1881	if ( Sym.NumberOfAuxSymbols == 1
1882	&& ( iLineSect == 1
1883	\|\| Sym.SectionNumber == (int32_t)iLineSect) )
1884	{
1885	memcpy(&Aux, &paSymbols[iSymbol + 1], sizeof(Aux));
1886	if (iLineSect == 1)
1887	Log3((" section: cb=%#010x #relocs=%#06x #lines=%#06x csum=%#x num=%#x sel=%x rvd=%u\n",
1888	Aux.Section.Length, Aux.Section.NumberOfRelocations,
1889	Aux.Section.NumberOfLinenumbers,
1890	Aux.Section.CheckSum,
1891	RT_MAKE_U32(Aux.Section.Number, Aux.Section.HighNumber),
1892	Aux.Section.Selection,
1893	Aux.Section.bReserved));
1894	if ( Sym.SectionNumber == (int32_t)iLineSect
1895	&& Aux.Section.NumberOfLinenumbers > 0)
1896	{
1897	uint32_t cLinesToAdd = RT_MIN(Aux.Section.NumberOfLinenumbers, cLines - iLine);
1898	if (iLine < cLines && szFile[0])
1899	rtDbgModCvAddCoffLineNumbers(pThis, szFile, iLineSect, &paLines[iLine], cLinesToAdd);
1900	iLine += cLinesToAdd;
1901	}
1902	}
1903	/* Not so sure about the quality here, but might be useful. */
1904	else if ( iLineSect == 1
1905	&& Sym.NumberOfAuxSymbols == 0
1906	&& Sym.SectionNumber != IMAGE_SYM_UNDEFINED
1907	&& Sym.SectionNumber != IMAGE_SYM_ABSOLUTE
1908	&& Sym.SectionNumber != IMAGE_SYM_DEBUG
1909	&& Sym.Value > 0
1910	&& *pszName)
1911	rtDbgModCvAddCoffSymbol(pThis, RTDBGSEGIDX_RVA, Sym.Value, pszName);
1912	break;
1913
1914	case IMAGE_SYM_CLASS_EXTERNAL:
1915	/* Add functions (first pass only). */
1916	if ( iLineSect == 1
1917	&& (ISFCN(Sym.Type) \|\| Sym.Type == 0)
1918	&& Sym.NumberOfAuxSymbols == 0
1919	&& *pszName )
1920	{
1921	if (Sym.SectionNumber == IMAGE_SYM_ABSOLUTE)
1922	rtDbgModCvAddCoffSymbol(pThis, RTDBGSEGIDX_ABS, Sym.Value, pszName);
1923	else if ( Sym.SectionNumber != IMAGE_SYM_UNDEFINED
1924	&& Sym.SectionNumber != IMAGE_SYM_DEBUG)
1925	rtDbgModCvAddCoffSymbol(pThis, RTDBGSEGIDX_RVA, Sym.Value, pszName);
1926	}
1927	break;
1928
1929	case IMAGE_SYM_CLASS_FUNCTION:
1930	/* Not sure this is really used. */
1931	break;
1932
1933	case IMAGE_SYM_CLASS_END_OF_FUNCTION:
1934	case IMAGE_SYM_CLASS_AUTOMATIC:
1935	case IMAGE_SYM_CLASS_REGISTER:
1936	case IMAGE_SYM_CLASS_EXTERNAL_DEF:
1937	case IMAGE_SYM_CLASS_LABEL:
1938	case IMAGE_SYM_CLASS_UNDEFINED_LABEL:
1939	case IMAGE_SYM_CLASS_MEMBER_OF_STRUCT:
1940	case IMAGE_SYM_CLASS_ARGUMENT:
1941	case IMAGE_SYM_CLASS_STRUCT_TAG:
1942	case IMAGE_SYM_CLASS_MEMBER_OF_UNION:
1943	case IMAGE_SYM_CLASS_UNION_TAG:
1944	case IMAGE_SYM_CLASS_TYPE_DEFINITION:
1945	case IMAGE_SYM_CLASS_UNDEFINED_STATIC:
1946	case IMAGE_SYM_CLASS_ENUM_TAG:
1947	case IMAGE_SYM_CLASS_MEMBER_OF_ENUM:
1948	case IMAGE_SYM_CLASS_REGISTER_PARAM:
1949	case IMAGE_SYM_CLASS_BIT_FIELD:
1950	case IMAGE_SYM_CLASS_FAR_EXTERNAL:
1951	case IMAGE_SYM_CLASS_BLOCK:
1952	case IMAGE_SYM_CLASS_END_OF_STRUCT:
1953	case IMAGE_SYM_CLASS_SECTION:
1954	case IMAGE_SYM_CLASS_WEAK_EXTERNAL:
1955	case IMAGE_SYM_CLASS_CLR_TOKEN:
1956	/* Not used by MS, I think. */
1957	break;
1958
1959	default:
1960	Log(("RTDbgCv: Unexpected COFF storage class %#x (%u)\n", Sym.StorageClass, Sym.StorageClass));
1961	break;
1962	}
1963
1964	/* next symbol */
1965	iSymbol += 1 + Sym.NumberOfAuxSymbols;
1966	}
1967
1968	/* Next section with line numbers. */
1969	iLineSect++;
1970	} while (iLine < cLines && iLineSect < cSections && RT_SUCCESS(rc));
1971
1972	return rc;
1973	}
1974
1975
1976	/**
1977	* Loads COFF debug information into the container.
1978	*
1979	* @returns IPRT status code.
1980	* @param pThis The COFF/CodeView debug reader instance.
1981	*/
1982	static int rtDbgModCvLoadCoffInfo(PRTDBGMODCV pThis)
1983	{
1984	/*
1985	* Read the whole section into memory.
1986	* Note! Cannot use rtDbgModCvReadAt or rtDbgModCvReadAtAlloc here.
1987	*/
1988	int rc;
1989	uint8_t pbDbgSect = (uint8_t )RTMemAlloc(pThis->cbCoffDbgInfo);
1990	if (pbDbgSect)
1991	{
1992	if (pThis->hFile == NIL_RTFILE)
1993	rc = pThis->pMod->pImgVt->pfnReadAt(pThis->pMod, UINT32_MAX, pThis->offCoffDbgInfo, pbDbgSect, pThis->cbCoffDbgInfo);
1994	else
1995	rc = RTFileReadAt(pThis->hFile, pThis->offCoffDbgInfo, pbDbgSect, pThis->cbCoffDbgInfo, NULL);
1996	if (RT_SUCCESS(rc))
1997	{
1998	/* The string table follows after the symbol table. */
1999	const char pszzStrTab = (const char )( pbDbgSect
2000	+ pThis->CoffHdr.LvaToFirstSymbol
2001	+ pThis->CoffHdr.NumberOfSymbols * sizeof(IMAGE_SYMBOL));
2002	uint32_t cbStrTab = (uint32_t)((uintptr_t)(pbDbgSect + pThis->cbCoffDbgInfo) - (uintptr_t)pszzStrTab);
2003	/** @todo The symbol table starts with a size. Read it and checking. Also verify
2004	* that the symtab ends with a terminator character. */
2005
2006	rc = rtDbgModCvProcessCoffSymbolTable(pThis,
2007	(PCIMAGE_SYMBOL)(pbDbgSect + pThis->CoffHdr.LvaToFirstSymbol),
2008	pThis->CoffHdr.NumberOfSymbols,
2009	(PCIMAGE_LINENUMBER)(pbDbgSect + pThis->CoffHdr.LvaToFirstLinenumber),
2010	pThis->CoffHdr.NumberOfLinenumbers,
2011	pszzStrTab, cbStrTab);
2012	}
2013	RTMemFree(pbDbgSect);
2014	}
2015	else
2016	rc = VERR_NO_MEMORY;
2017	return rc;
2018	}
2019
2020
2021
2022
2023
2024
2025	/*
2026	*
2027	* CodeView Debug module implementation.
2028	* CodeView Debug module implementation.
2029	* CodeView Debug module implementation.
2030	*
2031	*/
2032
2033
2034	/** @interface_method_impl{RTDBGMODVTDBG,pfnLineByAddr} */
2035	static DECLCALLBACK(int) rtDbgModCv_LineByAddr(PRTDBGMODINT pMod, RTDBGSEGIDX iSeg, RTUINTPTR off,
2036	PRTINTPTR poffDisp, PRTDBGLINE pLineInfo)
2037	{
2038	PRTDBGMODCV pThis = (PRTDBGMODCV)pMod->pvDbgPriv;
2039	return RTDbgModLineByAddr(pThis->hCnt, iSeg, off, poffDisp, pLineInfo);
2040	}
2041
2042
2043	/** @interface_method_impl{RTDBGMODVTDBG,pfnLineByOrdinal} */
2044	static DECLCALLBACK(int) rtDbgModCv_LineByOrdinal(PRTDBGMODINT pMod, uint32_t iOrdinal, PRTDBGLINE pLineInfo)
2045	{
2046	PRTDBGMODCV pThis = (PRTDBGMODCV)pMod->pvDbgPriv;
2047	return RTDbgModLineByOrdinal(pThis->hCnt, iOrdinal, pLineInfo);
2048	}
2049
2050
2051	/** @interface_method_impl{RTDBGMODVTDBG,pfnLineCount} */
2052	static DECLCALLBACK(uint32_t) rtDbgModCv_LineCount(PRTDBGMODINT pMod)
2053	{
2054	PRTDBGMODCV pThis = (PRTDBGMODCV)pMod->pvDbgPriv;
2055	return RTDbgModLineCount(pThis->hCnt);
2056	}
2057
2058
2059	/** @interface_method_impl{RTDBGMODVTDBG,pfnLineAdd} */
2060	static DECLCALLBACK(int) rtDbgModCv_LineAdd(PRTDBGMODINT pMod, const char *pszFile, size_t cchFile, uint32_t uLineNo,
2061	uint32_t iSeg, RTUINTPTR off, uint32_t *piOrdinal)
2062	{
2063	PRTDBGMODCV pThis = (PRTDBGMODCV)pMod->pvDbgPriv;
2064	Assert(!pszFile[cchFile]); NOREF(cchFile);
2065	return RTDbgModLineAdd(pThis->hCnt, pszFile, uLineNo, iSeg, off, piOrdinal);
2066	}
2067
2068
2069	/** @interface_method_impl{RTDBGMODVTDBG,pfnSymbolByAddr} */
2070	static DECLCALLBACK(int) rtDbgModCv_SymbolByAddr(PRTDBGMODINT pMod, RTDBGSEGIDX iSeg, RTUINTPTR off, uint32_t fFlags,
2071	PRTINTPTR poffDisp, PRTDBGSYMBOL pSymInfo)
2072	{
2073	PRTDBGMODCV pThis = (PRTDBGMODCV)pMod->pvDbgPriv;
2074	return RTDbgModSymbolByAddr(pThis->hCnt, iSeg, off, fFlags, poffDisp, pSymInfo);
2075	}
2076
2077
2078	/** @interface_method_impl{RTDBGMODVTDBG,pfnSymbolByName} */
2079	static DECLCALLBACK(int) rtDbgModCv_SymbolByName(PRTDBGMODINT pMod, const char *pszSymbol, size_t cchSymbol,
2080	PRTDBGSYMBOL pSymInfo)
2081	{
2082	PRTDBGMODCV pThis = (PRTDBGMODCV)pMod->pvDbgPriv;
2083	Assert(!pszSymbol[cchSymbol]);
2084	return RTDbgModSymbolByName(pThis->hCnt, pszSymbol/, cchSymbol/, pSymInfo);
2085	}
2086
2087
2088	/** @interface_method_impl{RTDBGMODVTDBG,pfnSymbolByOrdinal} */
2089	static DECLCALLBACK(int) rtDbgModCv_SymbolByOrdinal(PRTDBGMODINT pMod, uint32_t iOrdinal, PRTDBGSYMBOL pSymInfo)
2090	{
2091	PRTDBGMODCV pThis = (PRTDBGMODCV)pMod->pvDbgPriv;
2092	return RTDbgModSymbolByOrdinal(pThis->hCnt, iOrdinal, pSymInfo);
2093	}
2094
2095
2096	/** @interface_method_impl{RTDBGMODVTDBG,pfnSymbolCount} */
2097	static DECLCALLBACK(uint32_t) rtDbgModCv_SymbolCount(PRTDBGMODINT pMod)
2098	{
2099	PRTDBGMODCV pThis = (PRTDBGMODCV)pMod->pvDbgPriv;
2100	return RTDbgModSymbolCount(pThis->hCnt);
2101	}
2102
2103
2104	/** @interface_method_impl{RTDBGMODVTDBG,pfnSymbolAdd} */
2105	static DECLCALLBACK(int) rtDbgModCv_SymbolAdd(PRTDBGMODINT pMod, const char *pszSymbol, size_t cchSymbol,
2106	RTDBGSEGIDX iSeg, RTUINTPTR off, RTUINTPTR cb, uint32_t fFlags,
2107	uint32_t *piOrdinal)
2108	{
2109	PRTDBGMODCV pThis = (PRTDBGMODCV)pMod->pvDbgPriv;
2110	Assert(!pszSymbol[cchSymbol]); NOREF(cchSymbol);
2111	return RTDbgModSymbolAdd(pThis->hCnt, pszSymbol, iSeg, off, cb, fFlags, piOrdinal);
2112	}
2113
2114
2115	/** @interface_method_impl{RTDBGMODVTDBG,pfnSegmentByIndex} */
2116	static DECLCALLBACK(int) rtDbgModCv_SegmentByIndex(PRTDBGMODINT pMod, RTDBGSEGIDX iSeg, PRTDBGSEGMENT pSegInfo)
2117	{
2118	PRTDBGMODCV pThis = (PRTDBGMODCV)pMod->pvDbgPriv;
2119	return RTDbgModSegmentByIndex(pThis->hCnt, iSeg, pSegInfo);
2120	}
2121
2122
2123	/** @interface_method_impl{RTDBGMODVTDBG,pfnSegmentCount} */
2124	static DECLCALLBACK(RTDBGSEGIDX) rtDbgModCv_SegmentCount(PRTDBGMODINT pMod)
2125	{
2126	PRTDBGMODCV pThis = (PRTDBGMODCV)pMod->pvDbgPriv;
2127	return RTDbgModSegmentCount(pThis->hCnt);
2128	}
2129
2130
2131	/** @interface_method_impl{RTDBGMODVTDBG,pfnSegmentAdd} */
2132	static DECLCALLBACK(int) rtDbgModCv_SegmentAdd(PRTDBGMODINT pMod, RTUINTPTR uRva, RTUINTPTR cb, const char *pszName, size_t cchName,
2133	uint32_t fFlags, PRTDBGSEGIDX piSeg)
2134	{
2135	PRTDBGMODCV pThis = (PRTDBGMODCV)pMod->pvDbgPriv;
2136	Assert(!pszName[cchName]); NOREF(cchName);
2137	return RTDbgModSegmentAdd(pThis->hCnt, uRva, cb, pszName, fFlags, piSeg);
2138	}
2139
2140
2141	/** @interface_method_impl{RTDBGMODVTDBG,pfnImageSize} */
2142	static DECLCALLBACK(RTUINTPTR) rtDbgModCv_ImageSize(PRTDBGMODINT pMod)
2143	{
2144	PRTDBGMODCV pThis = (PRTDBGMODCV)pMod->pvDbgPriv;
2145	if (pThis->cbImage)
2146	return pThis->cbImage;
2147	return RTDbgModImageSize(pThis->hCnt);
2148	}
2149
2150
2151	/** @interface_method_impl{RTDBGMODVTDBG,pfnRvaToSegOff} */
2152	static DECLCALLBACK(RTDBGSEGIDX) rtDbgModCv_RvaToSegOff(PRTDBGMODINT pMod, RTUINTPTR uRva, PRTUINTPTR poffSeg)
2153	{
2154	PRTDBGMODCV pThis = (PRTDBGMODCV)pMod->pvDbgPriv;
2155	return RTDbgModRvaToSegOff(pThis->hCnt, uRva, poffSeg);
2156	}
2157
2158
2159	/** @interface_method_impl{RTDBGMODVTDBG,pfnClose} */
2160	static DECLCALLBACK(int) rtDbgModCv_Close(PRTDBGMODINT pMod)
2161	{
2162	PRTDBGMODCV pThis = (PRTDBGMODCV)pMod->pvDbgPriv;
2163
2164	RTDbgModRelease(pThis->hCnt);
2165	if (pThis->hFile != NIL_RTFILE)
2166	RTFileClose(pThis->hFile);
2167	RTMemFree(pThis->paDirEnts);
2168	RTMemFree(pThis);
2169
2170	pMod->pvDbgPriv = NULL; /* for internal use */
2171	return VINF_SUCCESS;
2172	}
2173
2174
2175	/*
2176	*
2177	* Probing code used by rtDbgModCv_TryOpen.
2178	* Probing code used by rtDbgModCv_TryOpen.
2179	*
2180	*/
2181
2182
2183
2184	/**
2185	* @callback_method_impl{FNRTLDRENUMSEGS, Used to add segments from the image}
2186	*/
2187	static DECLCALLBACK(int) rtDbgModCvAddSegmentsCallback(RTLDRMOD hLdrMod, PCRTLDRSEG pSeg, void *pvUser)
2188	{
2189	PRTDBGMODCV pThis = (PRTDBGMODCV)pvUser;
2190	Log(("Segment %s: LinkAddress=%#llx RVA=%#llx cb=%#llx\n",
2191	pSeg->pszName, (uint64_t)pSeg->LinkAddress, (uint64_t)pSeg->RVA, pSeg->cb));
2192	NOREF(hLdrMod);
2193
2194	/* If the segment doesn't have a mapping, just add a dummy so the indexing
2195	works out correctly (same as for the image). */
2196	if (pSeg->RVA == NIL_RTLDRADDR)
2197	return RTDbgModSegmentAdd(pThis->hCnt, 0, 0, pSeg->pszName, 0 /fFlags/, NULL);
2198
2199	RTLDRADDR cb = RT_MAX(pSeg->cb, pSeg->cbMapped);
2200	return RTDbgModSegmentAdd(pThis->hCnt, pSeg->RVA, cb, pSeg->pszName, 0 /fFlags/, NULL);
2201	}
2202
2203
2204	/**
2205	* Copies the sections over from the DBG file.
2206	*
2207	* Called if we don't have an associated executable image.
2208	*
2209	* @returns IPRT status code.
2210	* @param pThis The CV module instance.
2211	* @param pDbgHdr The DBG file header.
2212	* @param pszFilename The filename (for logging).
2213	*/
2214	static int rtDbgModCvAddSegmentsFromDbg(PRTDBGMODCV pThis, PCIMAGE_SEPARATE_DEBUG_HEADER pDbgHdr, const char *pszFilename)
2215	{
2216	/*
2217	* Validate the header fields a little.
2218	*/
2219	if ( pDbgHdr->NumberOfSections < 1
2220	\|\| pDbgHdr->NumberOfSections > 4096)
2221	{
2222	Log(("RTDbgModCv: Bad NumberOfSections: %d\n", pDbgHdr->NumberOfSections));
2223	return VERR_CV_BAD_FORMAT;
2224	}
2225	if (!RT_IS_POWER_OF_TWO(pDbgHdr->SectionAlignment))
2226	{
2227	Log(("RTDbgModCv: Bad SectionAlignment: %#x\n", pDbgHdr->SectionAlignment));
2228	return VERR_CV_BAD_FORMAT;
2229	}
2230
2231	/*
2232	* Read the section table.
2233	*/
2234	size_t cbShs = pDbgHdr->NumberOfSections * sizeof(IMAGE_SECTION_HEADER);
2235	PIMAGE_SECTION_HEADER paShs = (PIMAGE_SECTION_HEADER)RTMemAlloc(cbShs);
2236	if (!paShs)
2237	return VERR_NO_MEMORY;
2238	int rc = RTFileReadAt(pThis->hFile, sizeof(*pDbgHdr), paShs, cbShs, NULL);
2239	if (RT_SUCCESS(rc))
2240	{
2241	/*
2242	* Do some basic validation.
2243	*/
2244	uint32_t cbHeaders = 0;
2245	uint32_t uRvaPrev = 0;
2246	for (uint32_t i = 0; i < pDbgHdr->NumberOfSections; i++)
2247	{
2248	Log3(("RTDbgModCv: Section #%02u %#010x LB %#010x %.*s\n",
2249	i, paShs[i].VirtualAddress, paShs[i].Misc.VirtualSize, sizeof(paShs[i].Name), paShs[i].Name));
2250
2251	if (paShs[i].Characteristics & IMAGE_SCN_TYPE_NOLOAD)
2252	continue;
2253
2254	if (paShs[i].VirtualAddress < uRvaPrev)
2255	{
2256	Log(("RTDbgModCv: %s: Overlap or soring error, VirtualAddress=%#x uRvaPrev=%#x - section #%d '%.*s'!!!\n",
2257	pszFilename, paShs[i].VirtualAddress, uRvaPrev, i, sizeof(paShs[i].Name), paShs[i].Name));
2258	rc = VERR_CV_BAD_FORMAT;
2259	}
2260	else if ( paShs[i].VirtualAddress > pDbgHdr->SizeOfImage
2261	\|\| paShs[i].Misc.VirtualSize > pDbgHdr->SizeOfImage
2262	\|\| paShs[i].VirtualAddress + paShs[i].Misc.VirtualSize > pDbgHdr->SizeOfImage)
2263	{
2264	Log(("RTDbgModCv: %s: VirtualAddress=%#x VirtualSize=%#x (total %x) - beyond image size (%#x) - section #%d '%.*s'!!!\n",
2265	pszFilename, paShs[i].VirtualAddress, paShs[i].Misc.VirtualSize,
2266	paShs[i].VirtualAddress + paShs[i].Misc.VirtualSize,
2267	pThis->cbImage, i, sizeof(paShs[i].Name), paShs[i].Name));
2268	rc = VERR_CV_BAD_FORMAT;
2269	}
2270	else if (paShs[i].VirtualAddress & (pDbgHdr->SectionAlignment - 1))
2271	{
2272	Log(("RTDbgModCv: %s: VirtualAddress=%#x misaligned (%#x) - section #%d '%.*s'!!!\n",
2273	pszFilename, paShs[i].VirtualAddress, pDbgHdr->SectionAlignment, i, sizeof(paShs[i].Name), paShs[i].Name));
2274	rc = VERR_CV_BAD_FORMAT;
2275	}
2276	else
2277	{
2278	if (uRvaPrev == 0)
2279	cbHeaders = paShs[i].VirtualAddress;
2280	uRvaPrev = paShs[i].VirtualAddress + paShs[i].Misc.VirtualSize;
2281	continue;
2282	}
2283	}
2284	if (RT_SUCCESS(rc) && uRvaPrev == 0)
2285	{
2286	Log(("RTDbgModCv: %s: No loadable sections.\n", pszFilename));
2287	rc = VERR_CV_BAD_FORMAT;
2288	}
2289	if (RT_SUCCESS(rc) && cbHeaders == 0)
2290	{
2291	Log(("RTDbgModCv: %s: No space for PE headers.\n", pszFilename));
2292	rc = VERR_CV_BAD_FORMAT;
2293	}
2294	if (RT_SUCCESS(rc))
2295	{
2296	/*
2297	* Add sections.
2298	*/
2299	rc = RTDbgModSegmentAdd(pThis->hCnt, 0, cbHeaders, "NtHdrs", 0 /fFlags/, NULL);
2300	for (uint32_t i = 0; RT_SUCCESS(rc) && i < pDbgHdr->NumberOfSections; i++)
2301	{
2302	char szName[sizeof(paShs[i].Name) + 1];
2303	memcpy(szName, paShs[i].Name, sizeof(paShs[i].Name));
2304	szName[sizeof(szName) - 1] = '\0';
2305
2306	if (paShs[i].Characteristics & IMAGE_SCN_TYPE_NOLOAD)
2307	rc = RTDbgModSegmentAdd(pThis->hCnt, 0, 0, szName, 0 /fFlags/, NULL);
2308	else
2309	rc = RTDbgModSegmentAdd(pThis->hCnt, paShs[i].VirtualAddress, paShs[i].Misc.VirtualSize, szName,
2310	0 /fFlags/, NULL);
2311	}
2312	if (RT_SUCCESS(rc))
2313	pThis->fHaveLoadedSegments = true;
2314	}
2315	}
2316
2317	RTMemFree(paShs);
2318	return rc;
2319	}
2320
2321
2322	/**
2323	* Instantiates the CV/COFF reader.
2324	*
2325	* @returns IPRT status code
2326	* @param pDbgMod The debug module instance.
2327	* @param enmFileType The type of input file.
2328	* @param hFile The file handle, NIL_RTFILE of image.
2329	* @param ppThis Where to return the reader instance.
2330	*/
2331	static int rtDbgModCvCreateInstance(PRTDBGMODINT pDbgMod, RTCVFILETYPE enmFileType, RTFILE hFile, PRTDBGMODCV *ppThis)
2332	{
2333	/*
2334	* Do we already have an instance? Happens if we find multiple debug
2335	* formats we support.
2336	*/
2337	PRTDBGMODCV pThis = (PRTDBGMODCV)pDbgMod->pvDbgPriv;
2338	if (pThis)
2339	{
2340	Assert(pThis->enmType == enmFileType);
2341	Assert(pThis->hFile == hFile);
2342	Assert(pThis->pMod == pDbgMod);
2343	*ppThis = pThis;
2344	return VINF_SUCCESS;
2345	}
2346
2347	/*
2348	* Create a new instance.
2349	*/
2350	pThis = (PRTDBGMODCV)RTMemAllocZ(sizeof(RTDBGMODCV));
2351	if (!pThis)
2352	return VERR_NO_MEMORY;
2353	int rc = RTDbgModCreate(&pThis->hCnt, pDbgMod->pszName, 0 /cbSeg/, 0 /fFlags/);
2354	if (RT_SUCCESS(rc))
2355	{
2356	pDbgMod->pvDbgPriv = pThis;
2357	pThis->enmType = enmFileType;
2358	pThis->hFile = hFile;
2359	pThis->pMod = pDbgMod;
2360	pThis->offBase = UINT32_MAX;
2361	pThis->offCoffDbgInfo = UINT32_MAX;
2362	*ppThis = pThis;
2363	return VINF_SUCCESS;
2364	}
2365	RTMemFree(pThis);
2366	return rc;
2367	}
2368
2369
2370	/**
2371	* Common part of the COFF probing.
2372	*
2373	* @returns status code.
2374	* @param pDbgMod The debug module instance. On success pvDbgPriv
2375	* will point to a valid RTDBGMODCV.
2376	* @param enmFileType The kind of file this is we're probing.
2377	* @param hFile The file with debug info in it.
2378	* @param off The offset where to expect CV debug info.
2379	* @param cb The number of bytes of debug info.
2380	* @param pszFilename The path to the file (for logging).
2381	*/
2382	static int rtDbgModCvProbeCoff(PRTDBGMODINT pDbgMod, RTCVFILETYPE enmFileType, RTFILE hFile,
2383	uint32_t off, uint32_t cb, const char *pszFilename)
2384	{
2385	/*
2386	* Check that there is sufficient data for a header, then read it.
2387	*/
2388	if (cb < sizeof(IMAGE_COFF_SYMBOLS_HEADER))
2389	{
2390	Log(("RTDbgModCv: Not enough room for COFF header.\n"));
2391	return VERR_BAD_EXE_FORMAT;
2392	}
2393	if (cb >= UINT32_C(128) * _1M)
2394	{
2395	Log(("RTDbgModCv: COFF debug information is to large (%'u bytes), max is 128MB\n", cb));
2396	return VERR_BAD_EXE_FORMAT;
2397	}
2398
2399	int rc;
2400	IMAGE_COFF_SYMBOLS_HEADER Hdr;
2401	if (hFile == NIL_RTFILE)
2402	rc = pDbgMod->pImgVt->pfnReadAt(pDbgMod, UINT32_MAX, off, &Hdr, sizeof(Hdr));
2403	else
2404	rc = RTFileReadAt(hFile, off, &Hdr, sizeof(Hdr), NULL);
2405	if (RT_FAILURE(rc))
2406	{
2407	Log(("RTDbgModCv: Error reading COFF header: %Rrc\n", rc));
2408	return rc;
2409	}
2410
2411	Log2(("RTDbgModCv: Found COFF debug info header at %#x (LB %#x) in %s\n", off, cb, pszFilename));
2412	Log2((" NumberOfSymbols = %#010x\n", Hdr.NumberOfSymbols));
2413	Log2((" LvaToFirstSymbol = %#010x\n", Hdr.LvaToFirstSymbol));
2414	Log2((" NumberOfLinenumbers = %#010x\n", Hdr.NumberOfLinenumbers));
2415	Log2((" LvaToFirstLinenumber = %#010x\n", Hdr.LvaToFirstLinenumber));
2416	Log2((" RvaToFirstByteOfCode = %#010x\n", Hdr.RvaToFirstByteOfCode));
2417	Log2((" RvaToLastByteOfCode = %#010x\n", Hdr.RvaToLastByteOfCode));
2418	Log2((" RvaToFirstByteOfData = %#010x\n", Hdr.RvaToFirstByteOfData));
2419	Log2((" RvaToLastByteOfData = %#010x\n", Hdr.RvaToLastByteOfData));
2420
2421	/*
2422	* Validate the COFF header.
2423	*/
2424	if ( (uint64_t)Hdr.LvaToFirstSymbol + (uint64_t)Hdr.NumberOfSymbols * sizeof(IMAGE_SYMBOL) > cb
2425	\|\| (Hdr.LvaToFirstSymbol < sizeof(Hdr) && Hdr.NumberOfSymbols > 0))
2426	{
2427	Log(("RTDbgModCv: Bad COFF symbol count or/and offset: LvaToFirstSymbol=%#x, NumberOfSymbols=%#x cbCoff=%#x\n",
2428	Hdr.LvaToFirstSymbol, Hdr.NumberOfSymbols, cb));
2429	return VERR_BAD_EXE_FORMAT;
2430	}
2431	if ( (uint64_t)Hdr.LvaToFirstLinenumber + (uint64_t)Hdr.NumberOfLinenumbers * sizeof(IMAGE_LINENUMBER) > cb
2432	\|\| (Hdr.LvaToFirstLinenumber < sizeof(Hdr) && Hdr.NumberOfLinenumbers > 0))
2433	{
2434	Log(("RTDbgModCv: Bad COFF symbol count or/and offset: LvaToFirstSymbol=%#x, NumberOfSymbols=%#x cbCoff=%#x\n",
2435	Hdr.LvaToFirstSymbol, Hdr.NumberOfSymbols, cb));
2436	return VERR_BAD_EXE_FORMAT;
2437	}
2438	if (Hdr.NumberOfSymbols < 2)
2439	{
2440	Log(("RTDbgModCv: The COFF symbol table is too short to be of any worth... (%u syms)\n", Hdr.NumberOfSymbols));
2441	return VERR_NO_DATA;
2442	}
2443
2444	/*
2445	* What we care about looks fine, use it.
2446	*/
2447	PRTDBGMODCV pThis;
2448	rc = rtDbgModCvCreateInstance(pDbgMod, enmFileType, hFile, &pThis);
2449	if (RT_SUCCESS(rc))
2450	{
2451	pThis->offCoffDbgInfo = off;
2452	pThis->cbCoffDbgInfo = cb;
2453	pThis->CoffHdr = Hdr;
2454	}
2455
2456	return rc;
2457	}
2458
2459
2460	/**
2461	* Common part of the CodeView probing.
2462	*
2463	* @returns status code.
2464	* @param pDbgMod The debug module instance. On success pvDbgPriv
2465	* will point to a valid RTDBGMODCV.
2466	* @param pCvHdr The CodeView base header.
2467	* @param enmFileType The kind of file this is we're probing.
2468	* @param hFile The file with debug info in it.
2469	* @param off The offset where to expect CV debug info.
2470	* @param cb The number of bytes of debug info.
2471	* @param enmArch The desired image architecture.
2472	* @param pszFilename The path to the file (for logging).
2473	*/
2474	static int rtDbgModCvProbeCommon(PRTDBGMODINT pDbgMod, PRTCVHDR pCvHdr, RTCVFILETYPE enmFileType, RTFILE hFile,
2475	uint32_t off, uint32_t cb, RTLDRARCH enmArch, const char *pszFilename)
2476	{
2477	int rc = VERR_DBG_NO_MATCHING_INTERPRETER;
2478
2479	/* Is a codeview format we (wish to) support? */
2480	if ( pCvHdr->u32Magic == RTCVHDR_MAGIC_NB11
2481	\|\| pCvHdr->u32Magic == RTCVHDR_MAGIC_NB09
2482	\|\| pCvHdr->u32Magic == RTCVHDR_MAGIC_NB08
2483	\|\| pCvHdr->u32Magic == RTCVHDR_MAGIC_NB05
2484	\|\| pCvHdr->u32Magic == RTCVHDR_MAGIC_NB04
2485	\|\| pCvHdr->u32Magic == RTCVHDR_MAGIC_NB02
2486	\|\| pCvHdr->u32Magic == RTCVHDR_MAGIC_NB00
2487	)
2488	{
2489	/* We're assuming it's a base header, so the offset must be within
2490	the area defined by the debug info we got from the loader. */
2491	if (pCvHdr->off < cb && pCvHdr->off >= sizeof(*pCvHdr))
2492	{
2493	Log(("RTDbgModCv: Found %c%c%c%c at %#RTfoff - size %#x, directory at %#x. file type %d\n",
2494	RT_BYTE1(pCvHdr->u32Magic), RT_BYTE2(pCvHdr->u32Magic), RT_BYTE3(pCvHdr->u32Magic), RT_BYTE4(pCvHdr->u32Magic),
2495	off, cb, pCvHdr->off, enmFileType));
2496
2497	/*
2498	* Create a module instance, if not already done.
2499	*/
2500	PRTDBGMODCV pThis;
2501	rc = rtDbgModCvCreateInstance(pDbgMod, enmFileType, hFile, &pThis);
2502	if (RT_SUCCESS(rc))
2503	{
2504	pThis->u32CvMagic = pCvHdr->u32Magic;
2505	pThis->offBase = off;
2506	pThis->cbDbgInfo = cb;
2507	pThis->offDir = pCvHdr->off;
2508	return VINF_SUCCESS;
2509	}
2510	}
2511	}
2512
2513	return rc;
2514	}
2515
2516
2517	/** @callback_method_impl{FNRTLDRENUMDBG} */
2518	static DECLCALLBACK(int) rtDbgModCvEnumCallback(RTLDRMOD hLdrMod, PCRTLDRDBGINFO pDbgInfo, void *pvUser)
2519	{
2520	PRTDBGMODINT pDbgMod = (PRTDBGMODINT)pvUser;
2521	Assert(!pDbgMod->pvDbgPriv);
2522
2523	/* Skip external files, RTDbgMod will deal with those
2524	via RTDBGMODINT::pszDbgFile. */
2525	if (pDbgInfo->pszExtFile)
2526	return VINF_SUCCESS;
2527
2528	/* We only handle the codeview sections. */
2529	if (pDbgInfo->enmType == RTLDRDBGINFOTYPE_CODEVIEW)
2530	{
2531	/* Read the specified header and check if we like it. */
2532	RTCVHDR CvHdr;
2533	int rc = pDbgMod->pImgVt->pfnReadAt(pDbgMod, pDbgInfo->iDbgInfo, pDbgInfo->offFile, &CvHdr, sizeof(CvHdr));
2534	if (RT_SUCCESS(rc))
2535	rc = rtDbgModCvProbeCommon(pDbgMod, &CvHdr, RTCVFILETYPE_IMAGE, NIL_RTFILE, pDbgInfo->offFile, pDbgInfo->cb,
2536	pDbgMod->pImgVt->pfnGetArch(pDbgMod), pDbgMod->pszImgFile);
2537	}
2538	else if (pDbgInfo->enmType == RTLDRDBGINFOTYPE_COFF)
2539	{
2540	/* Join paths with the DBG code. */
2541	rtDbgModCvProbeCoff(pDbgMod, RTCVFILETYPE_IMAGE, NIL_RTFILE, pDbgInfo->offFile, pDbgInfo->cb, pDbgMod->pszImgFile);
2542	}
2543
2544	return VINF_SUCCESS;
2545	}
2546
2547
2548	/**
2549	* Part two of the external file probing.
2550	*
2551	* @returns status code.
2552	* @param pThis The debug module instance. On success pvDbgPriv
2553	* will point to a valid RTDBGMODCV.
2554	* @param enmFileType The kind of file this is we're probing.
2555	* @param hFile The file with debug info in it.
2556	* @param off The offset where to expect CV debug info.
2557	* @param cb The number of bytes of debug info.
2558	* @param enmArch The desired image architecture.
2559	* @param pszFilename The path to the file (for logging).
2560	*/
2561	static int rtDbgModCvProbeFile2(PRTDBGMODINT pThis, RTCVFILETYPE enmFileType, RTFILE hFile, uint32_t off, uint32_t cb,
2562	RTLDRARCH enmArch, const char *pszFilename)
2563	{
2564	RTCVHDR CvHdr;
2565	int rc = RTFileReadAt(hFile, off, &CvHdr, sizeof(CvHdr), NULL);
2566	if (RT_SUCCESS(rc))
2567	rc = rtDbgModCvProbeCommon(pThis, &CvHdr, enmFileType, hFile, off, cb, enmArch, pszFilename);
2568	return rc;
2569	}
2570
2571
2572	/**
2573	* Probes an external file for CodeView information.
2574	*
2575	* @returns status code.
2576	* @param pDbgMod The debug module instance. On success pvDbgPriv
2577	* will point to a valid RTDBGMODCV.
2578	* @param pszFilename The path to the file to probe.
2579	* @param enmArch The desired image architecture.
2580	*/
2581	static int rtDbgModCvProbeFile(PRTDBGMODINT pDbgMod, const char *pszFilename, RTLDRARCH enmArch)
2582	{
2583	RTFILE hFile;
2584	int rc = RTFileOpen(&hFile, pszFilename, RTFILE_O_READ \| RTFILE_O_DENY_WRITE \| RTFILE_O_OPEN);
2585	if (RT_FAILURE(rc))
2586	return rc;
2587
2588	/*
2589	* Check for .DBG file
2590	*/
2591	IMAGE_SEPARATE_DEBUG_HEADER DbgHdr;
2592	rc = RTFileReadAt(hFile, 0, &DbgHdr, sizeof(DbgHdr), NULL);
2593	if ( RT_SUCCESS(rc)
2594	&& DbgHdr.Signature == IMAGE_SEPARATE_DEBUG_SIGNATURE)
2595	{
2596	Log2(("RTDbgModCv: Found separate debug header in %s:\n", pszFilename));
2597	Log2((" Flags = %#x\n", DbgHdr.Flags));
2598	Log2((" Machine = %#x\n", DbgHdr.Machine));
2599	Log2((" Characteristics = %#x\n", DbgHdr.Characteristics));
2600	Log2((" TimeDateStamp = %#x\n", DbgHdr.TimeDateStamp));
2601	Log2((" CheckSum = %#x\n", DbgHdr.CheckSum));
2602	Log2((" ImageBase = %#x\n", DbgHdr.ImageBase));
2603	Log2((" SizeOfImage = %#x\n", DbgHdr.SizeOfImage));
2604	Log2((" NumberOfSections = %#x\n", DbgHdr.NumberOfSections));
2605	Log2((" ExportedNamesSize = %#x\n", DbgHdr.ExportedNamesSize));
2606	Log2((" DebugDirectorySize = %#x\n", DbgHdr.DebugDirectorySize));
2607	Log2((" SectionAlignment = %#x\n", DbgHdr.SectionAlignment));
2608
2609	/*
2610	* Match up the architecture if specified.
2611	*/
2612	switch (enmArch)
2613	{
2614	case RTLDRARCH_X86_32:
2615	if (DbgHdr.Machine != IMAGE_FILE_MACHINE_I386)
2616	rc = VERR_LDR_ARCH_MISMATCH;
2617	break;
2618	case RTLDRARCH_AMD64:
2619	if (DbgHdr.Machine != IMAGE_FILE_MACHINE_AMD64)
2620	rc = VERR_LDR_ARCH_MISMATCH;
2621	break;
2622
2623	default:
2624	case RTLDRARCH_HOST:
2625	AssertFailed();
2626	case RTLDRARCH_WHATEVER:
2627	break;
2628	}
2629	if (RT_FAILURE(rc))
2630	{
2631	RTFileClose(hFile);
2632	return rc;
2633	}
2634
2635	/*
2636	* Probe for readable debug info in the debug directory.
2637	*/
2638	uint32_t offDbgDir = sizeof(DbgHdr)
2639	+ DbgHdr.NumberOfSections * sizeof(IMAGE_SECTION_HEADER)
2640	+ DbgHdr.ExportedNamesSize;
2641
2642	uint32_t cEntries = DbgHdr.DebugDirectorySize / sizeof(IMAGE_DEBUG_DIRECTORY);
2643	for (uint32_t i = 0; i < cEntries; i++, offDbgDir += sizeof(IMAGE_DEBUG_DIRECTORY))
2644	{
2645	IMAGE_DEBUG_DIRECTORY DbgDir;
2646	rc = RTFileReadAt(hFile, offDbgDir, &DbgDir, sizeof(DbgDir), NULL);
2647	if (RT_FAILURE(rc))
2648	break;
2649	if (DbgDir.Type == IMAGE_DEBUG_TYPE_CODEVIEW)
2650	rc = rtDbgModCvProbeFile2(pDbgMod, RTCVFILETYPE_DBG, hFile,
2651	DbgDir.PointerToRawData, DbgDir.SizeOfData,
2652	enmArch, pszFilename);
2653	else if (DbgDir.Type == IMAGE_DEBUG_TYPE_COFF)
2654	rc = rtDbgModCvProbeCoff(pDbgMod, RTCVFILETYPE_DBG, hFile,
2655	DbgDir.PointerToRawData, DbgDir.SizeOfData, pszFilename);
2656	}
2657
2658	/*
2659	* If we get down here with an instance, it prooves that we've found
2660	* something, regardless of any errors. Add the sections and such.
2661	*/
2662	PRTDBGMODCV pThis = (PRTDBGMODCV)pDbgMod->pvDbgPriv;
2663	if (pThis)
2664	{
2665	pThis->cbImage = DbgHdr.SizeOfImage;
2666	if (pDbgMod->pImgVt)
2667	rc = VINF_SUCCESS;
2668	else
2669	{
2670	rc = rtDbgModCvAddSegmentsFromDbg(pThis, &DbgHdr, pszFilename);
2671	if (RT_FAILURE(rc))
2672	rtDbgModCv_Close(pDbgMod);
2673	}
2674	return rc;
2675	}
2676
2677	/* Failed to find CV or smth, look at the end of the file just to be sure... */
2678	}
2679
2680	/*
2681	* Look for CV tail header.
2682	*/
2683	uint64_t cbFile;
2684	rc = RTFileSeek(hFile, -(RTFOFF)sizeof(RTCVHDR), RTFILE_SEEK_END, &cbFile);
2685	if (RT_SUCCESS(rc))
2686	{
2687	cbFile += sizeof(RTCVHDR);
2688	RTCVHDR CvHdr;
2689	rc = RTFileRead(hFile, &CvHdr, sizeof(CvHdr), NULL);
2690	if (RT_SUCCESS(rc))
2691	rc = rtDbgModCvProbeFile2(pDbgMod, RTCVFILETYPE_OTHER_AT_END, hFile,
2692	cbFile - CvHdr.off, CvHdr.off, enmArch, pszFilename);
2693	}
2694
2695	if (RT_FAILURE(rc))
2696	RTFileClose(hFile);
2697	return rc;
2698	}
2699
2700
2701
2702	/** @interface_method_impl{RTDBGMODVTDBG,pfnTryOpen} */
2703	static DECLCALLBACK(int) rtDbgModCv_TryOpen(PRTDBGMODINT pMod, RTLDRARCH enmArch)
2704	{
2705	/*
2706	* Look for debug info.
2707	*/
2708	int rc = VERR_DBG_NO_MATCHING_INTERPRETER;
2709	if (pMod->pszDbgFile)
2710	rc = rtDbgModCvProbeFile(pMod, pMod->pszDbgFile, enmArch);
2711
2712	if (!pMod->pvDbgPriv && pMod->pImgVt)
2713	{
2714	int rc2 = pMod->pImgVt->pfnEnumDbgInfo(pMod, rtDbgModCvEnumCallback, pMod);
2715	if (RT_FAILURE(rc2))
2716	rc = rc2;
2717
2718	if (!pMod->pvDbgPriv)
2719	{
2720	/* Try the executable in case it has a NBxx tail header. */
2721	rc2 = rtDbgModCvProbeFile(pMod, pMod->pszImgFile, enmArch);
2722	if (RT_FAILURE(rc2) && (RT_SUCCESS(rc) \|\| rc == VERR_DBG_NO_MATCHING_INTERPRETER))
2723	rc = rc2;
2724	}
2725	}
2726
2727	PRTDBGMODCV pThis = (PRTDBGMODCV)pMod->pvDbgPriv;
2728	if (!pThis)
2729	return RT_SUCCESS_NP(rc) ? VERR_DBG_NO_MATCHING_INTERPRETER : rc;
2730	Assert(pThis->offBase != UINT32_MAX \|\| pThis->offCoffDbgInfo != UINT32_MAX);
2731
2732	/*
2733	* Load the debug info.
2734	*/
2735	if (pMod->pImgVt)
2736	{
2737	rc = pMod->pImgVt->pfnEnumSegments(pMod, rtDbgModCvAddSegmentsCallback, pThis);
2738	pThis->fHaveLoadedSegments = true;
2739	}
2740	if (RT_SUCCESS(rc) && pThis->offBase != UINT32_MAX)
2741	rc = rtDbgModCvLoadCodeViewInfo(pThis);
2742	if (RT_SUCCESS(rc) && pThis->offCoffDbgInfo != UINT32_MAX)
2743	rc = rtDbgModCvLoadCoffInfo(pThis);
2744	if (RT_SUCCESS(rc))
2745	{
2746	Log(("RTDbgCv: Successfully loaded debug info\n"));
2747	return VINF_SUCCESS;
2748	}
2749
2750	Log(("RTDbgCv: Debug info load error %Rrc\n", rc));
2751	rtDbgModCv_Close(pMod);
2752	return rc;
2753	}
2754
2755
2756
2757
2758
2759	/** Virtual function table for the CodeView debug info reader. */
2760	DECL_HIDDEN_CONST(RTDBGMODVTDBG) const g_rtDbgModVtDbgCodeView =
2761	{
2762	/.u32Magic = / RTDBGMODVTDBG_MAGIC,
2763	/.fSupports = / RT_DBGTYPE_CODEVIEW,
2764	/.pszName = / "codeview",
2765	/.pfnTryOpen = / rtDbgModCv_TryOpen,
2766	/.pfnClose = / rtDbgModCv_Close,
2767
2768	/.pfnRvaToSegOff = / rtDbgModCv_RvaToSegOff,
2769	/.pfnImageSize = / rtDbgModCv_ImageSize,
2770
2771	/.pfnSegmentAdd = / rtDbgModCv_SegmentAdd,
2772	/.pfnSegmentCount = / rtDbgModCv_SegmentCount,
2773	/.pfnSegmentByIndex = / rtDbgModCv_SegmentByIndex,
2774
2775	/.pfnSymbolAdd = / rtDbgModCv_SymbolAdd,
2776	/.pfnSymbolCount = / rtDbgModCv_SymbolCount,
2777	/.pfnSymbolByOrdinal = / rtDbgModCv_SymbolByOrdinal,
2778	/.pfnSymbolByName = / rtDbgModCv_SymbolByName,
2779	/.pfnSymbolByAddr = / rtDbgModCv_SymbolByAddr,
2780
2781	/.pfnLineAdd = / rtDbgModCv_LineAdd,
2782	/.pfnLineCount = / rtDbgModCv_LineCount,
2783	/.pfnLineByOrdinal = / rtDbgModCv_LineByOrdinal,
2784	/.pfnLineByAddr = / rtDbgModCv_LineByAddr,
2785
2786	/.u32EndMagic = / RTDBGMODVTDBG_MAGIC
2787	};
2788

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source: vbox/trunk/src/VBox/Runtime/common/dbg/dbgmodcodeview.cpp@ 58171

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