MakeAlternativeSource.cpp@ 101539

Last change on this file since 101539 was 101539, checked in by vboxsync, 14 months ago
DIS,VMM,DBGC,IPRT,++: Some disassembler tweaks and TB disassembly work. bugref:10371 bugref:9898
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 66.0 KB

Line
1	/* $Id: MakeAlternativeSource.cpp 101539 2023-10-22 02:43:09Z vboxsync $ */
2	/** @file
3	* MakeAlternative - Generate an Alternative BIOS Source that requires less tools.
4	*/
5
6	/*
7	* Copyright (C) 2012-2023 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28
29	/*********************************************************************************************************************************
30	* Header Files *
31	*********************************************************************************************************************************/
32	#include <iprt/asm.h>
33	#include <iprt/buildconfig.h>
34	#include <iprt/ctype.h>
35	#include <iprt/dbg.h>
36	#include <iprt/err.h>
37	#include <iprt/file.h>
38	#include <iprt/getopt.h>
39	#include <iprt/initterm.h>
40	#include <iprt/list.h>
41	#include <iprt/mem.h>
42	#include <iprt/message.h>
43	#include <iprt/string.h>
44	#include <iprt/stream.h>
45	#include <iprt/x86.h>
46
47	#include <VBox/dis.h>
48
49
50	/*********************************************************************************************************************************
51	* Structures and Typedefs *
52	*********************************************************************************************************************************/
53	/**
54	* A BIOS segment.
55	*/
56	typedef struct BIOSSEG
57	{
58	char szName[32];
59	char szClass[32];
60	char szGroup[32];
61	RTFAR16 Address;
62	uint32_t uFlatAddr;
63	uint32_t cb;
64	/** RVA into g_hSymMod. */
65	uint32_t uRva;
66	} BIOSSEG;
67	/** Pointer to a BIOS segment. */
68	typedef BIOSSEG *PBIOSSEG;
69
70
71	/**
72	* A BIOS object file.
73	*/
74	typedef struct BIOSOBJFILE
75	{
76	RTLISTNODE Node;
77	char *pszSource;
78	char *pszObject;
79	} BIOSOBJFILE;
80	/** A BIOS object file. */
81	typedef BIOSOBJFILE *PBIOSOBJFILE;
82
83
84	/**
85	* Pointer to a BIOS map parser handle.
86	*/
87	typedef struct BIOSMAP
88	{
89	/** The stream pointer. */
90	PRTSTREAM hStrm;
91	/** The file name. */
92	const char *pszMapFile;
93	/** Set when EOF has been reached. */
94	bool fEof;
95	/** The current line number (0 based).*/
96	uint32_t iLine;
97	/** The length of the current line. */
98	uint32_t cch;
99	/** The offset of the first non-white character on the line. */
100	uint32_t offNW;
101	/** The line buffer. */
102	char szLine[16384];
103	} BIOSMAP;
104	/** Pointer to a BIOS map parser handle. */
105	typedef BIOSMAP *PBIOSMAP;
106
107
108	/*********************************************************************************************************************************
109	* Global Variables *
110	*********************************************************************************************************************************/
111	/** The verbosity level.*/
112	static unsigned g_cVerbose = 2 /0/;
113	/** Pointer to the BIOS image. */
114	static uint8_t const *g_pbImg;
115	/** The size of the BIOS image. */
116	static size_t g_cbImg;
117
118	/** Debug module for the map file. */
119	static RTDBGMOD g_hMapMod = NIL_RTDBGMOD;
120	/** The number of BIOS segments found in the map file. */
121	static uint32_t g_cSegs = 0;
122	/** Array of BIOS segments from the map file. */
123	static BIOSSEG g_aSegs[32];
124	/** List of BIOSOBJFILE. */
125	static RTLISTANCHOR g_ObjList;
126
127	/** Debug module with symbols. */
128	static RTDBGMOD g_hSymMod = NIL_RTDBGMOD;
129
130	/** The output stream. */
131	static PRTSTREAM g_hStrmOutput = NULL;
132
133	/** The type of BIOS we're working on. */
134	static enum BIOSTYPE
135	{
136	kBiosType_System = 0,
137	kBiosType_Vga
138	} g_enmBiosType = kBiosType_System;
139	/** The flat ROM base address. */
140	static uint32_t g_uBiosFlatBase = 0xf0000;
141
142
143	static bool outputPrintfV(const char *pszFormat, va_list va)
144	{
145	int rc = RTStrmPrintfV(g_hStrmOutput, pszFormat, va);
146	if (RT_FAILURE(rc))
147	{
148	RTMsgError("Output error: %Rrc\n", rc);
149	return false;
150	}
151	return true;
152	}
153
154
155	static bool outputPrintf(const char *pszFormat, ...)
156	{
157	va_list va;
158	va_start(va, pszFormat);
159	bool fRc = outputPrintfV(pszFormat, va);
160	va_end(va);
161	return fRc;
162	}
163
164
165	/**
166	* Opens the output file for writing.
167	*
168	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
169	* @param pszOutput Path to the output file.
170	*/
171	static RTEXITCODE OpenOutputFile(const char *pszOutput)
172	{
173	if (!pszOutput)
174	g_hStrmOutput = g_pStdOut;
175	else
176	{
177	int rc = RTStrmOpen(pszOutput, "w", &g_hStrmOutput);
178	if (RT_FAILURE(rc))
179	return RTMsgErrorExit(RTEXITCODE_FAILURE, "Failed to open output file '%s': %Rrc", pszOutput, rc);
180	}
181	return RTEXITCODE_SUCCESS;
182	}
183
184
185	/**
186	* Displays a disassembly error and returns @c false.
187	*
188	* @returns @c false.
189	* @param pszFormat The error format string.
190	* @param ... Format argument.
191	*/
192	static bool disError(const char *pszFormat, ...)
193	{
194	va_list va;
195	va_start(va, pszFormat);
196	RTMsgErrorV(pszFormat, va);
197	va_end(va);
198	return false;
199	}
200
201
202	/**
203	* Output the disassembly file header.
204	*
205	* @returns @c true on success,
206	*/
207	static bool disFileHeader(void)
208	{
209	bool fRc;
210	fRc = outputPrintf("; $Id: MakeAlternativeSource.cpp 101539 2023-10-22 02:43:09Z vboxsync $ \n"
211	";; @file\n"
212	"; Auto Generated source file. Do not edit.\n"
213	";\n"
214	);
215	if (!fRc)
216	return fRc;
217
218	/*
219	* List the header of each source file, up to and including the
220	* copyright notice.
221	*/
222	bool fNeedLgplDisclaimer = false;
223	PBIOSOBJFILE pObjFile;
224	RTListForEach(&g_ObjList, pObjFile, BIOSOBJFILE, Node)
225	{
226	PRTSTREAM hStrm;
227	int rc = RTStrmOpen(pObjFile->pszSource, "r", &hStrm);
228	if (RT_SUCCESS(rc))
229	{
230	fRc = outputPrintf("\n"
231	";\n"
232	"; Source file: %Rbn\n"
233	";\n"
234	, pObjFile->pszSource);
235	uint32_t iLine = 0;
236	bool fSeenCopyright = false;
237	char szLine[4096];
238	while ((rc = RTStrmGetLine(hStrm, szLine, sizeof(szLine))) == VINF_SUCCESS)
239	{
240	iLine++;
241
242	/* Check if we're done. */
243	char *psz = RTStrStrip(szLine);
244	if ( fSeenCopyright
245	&& ( (psz[0] == '*' && psz[1] == '/')
246	\|\| psz[0] == '\0') )
247	break;
248
249	/* Strip comment suffix. */
250	size_t cch = strlen(psz);
251	if (cch >= 2 && psz[cch - 1] == '/' && psz[cch - 2] == '*')
252	{
253	psz[cch - 2] = '\0';
254	RTStrStripR(psz);
255	}
256
257	/* Skip line prefix. */
258	if (psz[0] == '/' && psz[1] == '*')
259	psz += 2;
260	else if (psz[0] == '*')
261	psz += 1;
262	else
263	while (*psz == ';')
264	psz++;
265	if (RT_C_IS_SPACE(*psz))
266	psz++;
267
268	/* Skip the doxygen file tag line. */
269	if (!strcmp(psz, "* @file") \|\| !strcmp(psz, "@file"))
270	continue;
271
272	/* Detect copyright section. */
273	if ( !fSeenCopyright
274	&& ( strstr(psz, "Copyright")
275	\|\| strstr(psz, "copyright")) )
276	fSeenCopyright = true;
277
278	/* Detect LGPL. */
279	if (strstr(psz, "LGPL"))
280	fNeedLgplDisclaimer = true;
281
282	fRc = outputPrintf("; %s\n", psz) && fRc;
283	}
284
285	RTStrmClose(hStrm);
286	if (rc != VINF_SUCCESS)
287	return disError("Error reading '%s': rc=%Rrc iLine=%u", pObjFile->pszSource, rc, iLine);
288	}
289	}
290
291	/*
292	* Add Oracle LGPL disclaimer.
293	*/
294	if (fNeedLgplDisclaimer)
295	outputPrintf("\n"
296	";\n"
297	"; Oracle LGPL Disclaimer: For the avoidance of doubt, except that if any license choice\n"
298	"; other than GPL or LGPL is available it will apply instead, Oracle elects to use only\n"
299	"; the Lesser General Public License version 2.1 (LGPLv2) at this time for any software where\n"
300	"; a choice of LGPL license versions is made available with the language indicating\n"
301	"; that LGPLv2 or any later version may be used, or where a choice of which version\n"
302	"; of the LGPL is applied is otherwise unspecified.\n"
303	";\n"
304	"\n");
305
306	/*
307	* Set the org.
308	*/
309	fRc = outputPrintf("\n"
310	"\n"
311	"\n"
312	) && fRc;
313	return fRc;
314	}
315
316
317	/**
318	* Checks if a byte sequence could be a string litteral.
319	*
320	* @returns @c true if it is, @c false if it isn't.
321	* @param uFlatAddr The address of the byte sequence.
322	* @param cb The length of the sequence.
323	*/
324	static bool disIsString(uint32_t uFlatAddr, uint32_t cb)
325	{
326	if (cb < 6)
327	return false;
328
329	uint8_t const *pb = &g_pbImg[uFlatAddr - g_uBiosFlatBase];
330	while (cb > 0)
331	{
332	if ( !RT_C_IS_PRINT(*pb)
333	&& *pb != '\r'
334	&& *pb != '\n'
335	&& *pb != '\t')
336	{
337	if (*pb == '\0')
338	{
339	do
340	{
341	pb++;
342	cb--;
343	} while (cb > 0 && *pb == '\0');
344	return cb == 0;
345	}
346	return false;
347	}
348	pb++;
349	cb--;
350	}
351
352	return true;
353	}
354
355
356	#if 0 /* unused */
357	/**
358	* Checks if a dword could be a far 16:16 BIOS address.
359	*
360	* @returns @c true if it is, @c false if it isn't.
361	* @param uFlatAddr The address of the dword.
362	*/
363	static bool disIsFarBiosAddr(uint32_t uFlatAddr)
364	{
365	uint16_t const pu16 = (uint16_t const )&g_pbImg[uFlatAddr - g_uBiosFlatBase];
366	if (pu16[1] < 0xf000)
367	return false;
368	if (pu16[1] > 0xfff0)
369	return false;
370	uint32_t uFlatAddr2 = (uint32_t)(pu16[1] << 4) \| pu16[0];
371	if (uFlatAddr2 >= g_uBiosFlatBase + g_cbImg)
372	return false;
373	return true;
374	}
375	#endif
376
377
378	static bool disByteData(uint32_t uFlatAddr, uint32_t cb)
379	{
380	uint8_t const *pb = &g_pbImg[uFlatAddr - g_uBiosFlatBase];
381	size_t cbOnLine = 0;
382	while (cb-- > 0)
383	{
384	bool fRc;
385	if (cbOnLine >= 16)
386	{
387	fRc = outputPrintf("\n"
388	" db 0%02xh", *pb);
389	cbOnLine = 1;
390	}
391	else if (!cbOnLine)
392	{
393	fRc = outputPrintf(" db 0%02xh", *pb);
394	cbOnLine = 1;
395	}
396	else
397	{
398	fRc = outputPrintf(", 0%02xh", *pb);
399	cbOnLine++;
400	}
401	if (!fRc)
402	return false;
403	pb++;
404	}
405	return outputPrintf("\n");
406	}
407
408
409	static bool disWordData(uint32_t uFlatAddr, uint32_t cb)
410	{
411	if (cb & 1)
412	return disError("disWordData expects word aligned size: cb=%#x uFlatAddr=%#x", uFlatAddr, cb);
413
414	uint16_t const pu16 = (uint16_t const )&g_pbImg[uFlatAddr - g_uBiosFlatBase];
415	size_t cbOnLine = 0;
416	while (cb > 0)
417	{
418	bool fRc;
419	if (cbOnLine >= 16)
420	{
421	fRc = outputPrintf("\n"
422	" dw 0%04xh", *pu16);
423	cbOnLine = 2;
424	}
425	else if (!cbOnLine)
426	{
427	fRc = outputPrintf(" dw 0%04xh", *pu16);
428	cbOnLine = 2;
429	}
430	else
431	{
432	fRc = outputPrintf(", 0%04xh", *pu16);
433	cbOnLine += 2;
434	}
435	if (!fRc)
436	return false;
437	pu16++;
438	cb -= 2;
439	}
440	return outputPrintf("\n");
441	}
442
443
444	static bool disDWordData(uint32_t uFlatAddr, uint32_t cb)
445	{
446	if (cb & 3)
447	return disError("disWordData expects dword aligned size: cb=%#x uFlatAddr=%#x", uFlatAddr, cb);
448
449	uint32_t const pu32 = (uint32_t const )&g_pbImg[uFlatAddr - g_uBiosFlatBase];
450	size_t cbOnLine = 0;
451	while (cb > 0)
452	{
453	bool fRc;
454	if (cbOnLine >= 16)
455	{
456	fRc = outputPrintf("\n"
457	" dd 0%08xh", *pu32);
458	cbOnLine = 4;
459	}
460	else if (!cbOnLine)
461	{
462	fRc = outputPrintf(" dd 0%08xh", *pu32);
463	cbOnLine = 4;
464	}
465	else
466	{
467	fRc = outputPrintf(", 0%08xh", *pu32);
468	cbOnLine += 4;
469	}
470	if (!fRc)
471	return false;
472	pu32++;
473	cb -= 4;
474	}
475	return outputPrintf("\n");
476	}
477
478
479	static bool disStringData(uint32_t uFlatAddr, uint32_t cb)
480	{
481	uint8_t const *pb = &g_pbImg[uFlatAddr - g_uBiosFlatBase];
482	uint32_t cchOnLine = 0;
483	while (cb > 0)
484	{
485	/* Line endings and beginnings. */
486	if (cchOnLine >= 72)
487	{
488	if (!outputPrintf("\n"))
489	return false;
490	cchOnLine = 0;
491	}
492	if ( !cchOnLine
493	&& !outputPrintf(" db "))
494	return false;
495
496	/* See how many printable character we've got. */
497	uint32_t cchPrintable = 0;
498	while ( cchPrintable < cb
499	&& RT_C_IS_PRINT(pb[cchPrintable])
500	&& pb[cchPrintable] != '\'')
501	cchPrintable++;
502
503	bool fRc = true;
504	if (cchPrintable)
505	{
506	if (cchPrintable + cchOnLine > 72)
507	cchPrintable = 72 - cchOnLine;
508	if (cchOnLine)
509	{
510	fRc = outputPrintf(", '%.*s'", cchPrintable, pb);
511	cchOnLine += 4 + cchPrintable;
512	}
513	else
514	{
515	fRc = outputPrintf("'%.*s'", cchPrintable, pb);
516	cchOnLine += 2 + cchPrintable;
517	}
518	pb += cchPrintable;
519	cb -= cchPrintable;
520	}
521	else
522	{
523	if (cchOnLine)
524	{
525	fRc = outputPrintf(", 0%02xh", *pb);
526	cchOnLine += 6;
527	}
528	else
529	{
530	fRc = outputPrintf("0%02xh", *pb);
531	cchOnLine += 4;
532	}
533	pb++;
534	cb--;
535	}
536	if (!fRc)
537	return false;
538	}
539	return outputPrintf("\n");
540	}
541
542
543	/**
544	* For dumping a portion of a string table.
545	*
546	* @returns @c true on success, @c false on failure.
547	* @param uFlatAddr The start address.
548	* @param cb The size of the string table.
549	*/
550	static bool disStringsData(uint32_t uFlatAddr, uint32_t cb)
551	{
552	uint8_t const *pb = &g_pbImg[uFlatAddr - g_uBiosFlatBase];
553	uint32_t cchOnLine = 0;
554	uint8_t bPrev = 255;
555	while (cb > 0)
556	{
557	/* Line endings and beginnings. */
558	if ( cchOnLine >= 72
559	\|\| (bPrev == '\0' && *pb != '\0'))
560	{
561	if (!outputPrintf("\n"))
562	return false;
563	cchOnLine = 0;
564	}
565	if ( !cchOnLine
566	&& !outputPrintf(" db "))
567	return false;
568
569	/* See how many printable character we've got. */
570	uint32_t cchPrintable = 0;
571	while ( cchPrintable < cb
572	&& RT_C_IS_PRINT(pb[cchPrintable])
573	&& pb[cchPrintable] != '\'')
574	cchPrintable++;
575
576	bool fRc = true;
577	if (cchPrintable)
578	{
579	if (cchPrintable + cchOnLine > 72)
580	cchPrintable = 72 - cchOnLine;
581	if (cchOnLine)
582	{
583	fRc = outputPrintf(", '%.*s'", cchPrintable, pb);
584	cchOnLine += 4 + cchPrintable;
585	}
586	else
587	{
588	fRc = outputPrintf("'%.*s'", cchPrintable, pb);
589	cchOnLine += 2 + cchPrintable;
590	}
591	pb += cchPrintable;
592	cb -= cchPrintable;
593	}
594	else
595	{
596	if (cchOnLine)
597	{
598	fRc = outputPrintf(", 0%02xh", *pb);
599	cchOnLine += 6;
600	}
601	else
602	{
603	fRc = outputPrintf("0%02xh", *pb);
604	cchOnLine += 4;
605	}
606	pb++;
607	cb--;
608	}
609	if (!fRc)
610	return false;
611	bPrev = pb[-1];
612	}
613	return outputPrintf("\n");
614	}
615
616
617	/**
618	* Minds the gap between two segments.
619	*
620	* Gaps should generally be zero filled.
621	*
622	* @returns @c true on success, @c false on failure.
623	* @param uFlatAddr The address of the gap.
624	* @param cbPadding The size of the gap.
625	*/
626	static bool disCopySegmentGap(uint32_t uFlatAddr, uint32_t cbPadding)
627	{
628	if (g_cVerbose > 0)
629	outputPrintf("\n"
630	" ; Padding %#x bytes at %#x\n", cbPadding, uFlatAddr);
631	uint8_t const *pb = &g_pbImg[uFlatAddr - g_uBiosFlatBase];
632	if (ASMMemIsZero(pb, cbPadding))
633	return outputPrintf(" times %u db 0\n", cbPadding);
634
635	return disByteData(uFlatAddr, cbPadding);
636	}
637
638
639	/**
640	* Worker for disGetNextSymbol that only does the looking up, no RTDBSYMBOL::cb
641	* calc.
642	*
643	* @param uFlatAddr The address to start searching at.
644	* @param cbMax The size of the search range.
645	* @param poff Where to return the offset between the symbol
646	* and @a uFlatAddr.
647	* @param pSym Where to return the symbol data.
648	*/
649	static void disGetNextSymbolWorker(uint32_t uFlatAddr, uint32_t cbMax, uint32_t *poff, PRTDBGSYMBOL pSym)
650	{
651	RTINTPTR offMap = RTINTPTR_MAX;
652	RTDBGSYMBOL MapSym;
653	int rcMap = RTDbgModSymbolByAddr(g_hMapMod, RTDBGSEGIDX_RVA, uFlatAddr, RTDBGSYMADDR_FLAGS_GREATER_OR_EQUAL, &offMap, &MapSym);
654
655	RTINTPTR off = RTINTPTR_MAX;
656	int rc = RTDbgModSymbolByAddr(g_hSymMod, RTDBGSEGIDX_RVA, uFlatAddr - g_uBiosFlatBase,
657	RTDBGSYMADDR_FLAGS_GREATER_OR_EQUAL, &off, pSym);
658	if ( RT_SUCCESS(rc)
659	&& RT_ABS(off) <= RT_ABS(offMap))
660	pSym->Value += g_uBiosFlatBase;
661	else
662	{
663	*pSym = MapSym;
664	off = offMap;
665	rc = rcMap;
666	}
667	if (RT_SUCCESS(rc))
668	{
669	/* negative offset, indicates beyond. */
670	if (off <= 0)
671	{
672	*poff = (uint32_t)-off;
673
674	/* Mangle symbols the assembler might confuse with instructions. */
675	size_t cchName = strlen(pSym->szName);
676	if ( cchName <= 4
677	&& ( strcmp("wait", pSym->szName) == 0
678	\|\| strcmp("hlt", pSym->szName) == 0))
679	{
680	memmove(&pSym->szName[1], &pSym->szName[0], cchName);
681	pSym->szName[0] = '_';
682	pSym->szName[cchName + 1] = '_';
683	pSym->szName[cchName + 2] = '\0';
684	}
685	return;
686	}
687
688	outputPrintf(" ; !! RTDbgModSymbolByAddr(,,%#x,,) -> off=%RTptr cb=%RTptr uValue=%RTptr '%s'\n",
689	uFlatAddr, off, pSym->cb, pSym->Value, pSym->szName);
690	}
691	else if (rc != VERR_SYMBOL_NOT_FOUND)
692	outputPrintf(" ; !! RTDbgModSymbolByAddr(,,%#x,,) -> %Rrc\n", uFlatAddr, rc);
693
694	RTStrPrintf(pSym->szName, sizeof(pSym->szName), "_dummy_addr_%#x", uFlatAddr + cbMax);
695	pSym->Value = uFlatAddr + cbMax;
696	pSym->cb = 0;
697	pSym->offSeg = uFlatAddr + cbMax;
698	pSym->iSeg = RTDBGSEGIDX_RVA;
699	pSym->iOrdinal = 0;
700	pSym->fFlags = 0;
701	*poff = cbMax;
702	}
703
704
705	/**
706	* Gets the symbol at or after the given address.
707	*
708	* If there are no symbols in the specified range, @a pSym and @a poff will be
709	* set up to indicate a symbol at the first byte after the range.
710	*
711	* @param uFlatAddr The address to start searching at.
712	* @param cbMax The size of the search range.
713	* @param poff Where to return the offset between the symbol
714	* and @a uFlatAddr.
715	* @param pSym Where to return the symbol data.
716	*/
717	static void disGetNextSymbol(uint32_t uFlatAddr, uint32_t cbMax, uint32_t *poff, PRTDBGSYMBOL pSym)
718	{
719	disGetNextSymbolWorker(uFlatAddr, cbMax, poff, pSym);
720	if ( *poff < cbMax
721	&& pSym->cb == 0)
722	{
723	if (*poff + 1 < cbMax)
724	{
725	uint32_t off2;
726	RTDBGSYMBOL Sym2;
727	disGetNextSymbolWorker(uFlatAddr + poff + 1, cbMax - poff - 1, &off2, &Sym2);
728	pSym->cb = off2 + 1;
729	}
730	else
731	pSym->cb = 1;
732	}
733	if (pSym->cb > cbMax - *poff)
734	pSym->cb = cbMax - *poff;
735
736	if (g_cVerbose > 1)
737	outputPrintf(" ; disGetNextSymbol %#x LB %#x -> off=%#x cb=%RTptr uValue=%RTptr '%s'\n",
738	uFlatAddr, cbMax, *poff, pSym->cb, pSym->Value, pSym->szName);
739
740	}
741
742
743	/**
744	* For dealing with the const segment (string constants).
745	*
746	* @returns @c true on success, @c false on failure.
747	* @param iSeg The segment.
748	*/
749	static bool disConstSegment(uint32_t iSeg)
750	{
751	uint32_t uFlatAddr = g_aSegs[iSeg].uFlatAddr;
752	uint32_t cb = g_aSegs[iSeg].cb;
753
754	while (cb > 0)
755	{
756	uint32_t off;
757	RTDBGSYMBOL Sym;
758	disGetNextSymbol(uFlatAddr, cb, &off, &Sym);
759
760	if (off > 0)
761	{
762	if (!disStringsData(uFlatAddr, off))
763	return false;
764	cb -= off;
765	uFlatAddr += off;
766	off = 0;
767	if (!cb)
768	break;
769	}
770
771	bool fRc;
772	if (off == 0)
773	{
774	size_t cchName = strlen(Sym.szName);
775	fRc = outputPrintf("%s: %*s; %#x LB %#x\n", Sym.szName, cchName < 41 - 2 ? cchName - 41 - 2 : 0, "", uFlatAddr, Sym.cb);
776	if (!fRc)
777	return false;
778	fRc = disStringsData(uFlatAddr, Sym.cb);
779	uFlatAddr += Sym.cb;
780	cb -= Sym.cb;
781	}
782	else
783	{
784	fRc = disStringsData(uFlatAddr, Sym.cb);
785	uFlatAddr += cb;
786	cb = 0;
787	}
788	if (!fRc)
789	return false;
790	}
791
792	return true;
793	}
794
795
796
797	static bool disDataSegment(uint32_t iSeg)
798	{
799	uint32_t uFlatAddr = g_aSegs[iSeg].uFlatAddr;
800	uint32_t cb = g_aSegs[iSeg].cb;
801
802	while (cb > 0)
803	{
804	uint32_t off;
805	RTDBGSYMBOL Sym;
806	disGetNextSymbol(uFlatAddr, cb, &off, &Sym);
807
808	if (off > 0)
809	{
810	if (!disByteData(uFlatAddr, off))
811	return false;
812	cb -= off;
813	uFlatAddr += off;
814	off = 0;
815	if (!cb)
816	break;
817	}
818
819	bool fRc;
820	if (off == 0)
821	{
822	size_t cchName = strlen(Sym.szName);
823	fRc = outputPrintf("%s: %*s; %#x LB %#x\n", Sym.szName, cchName < 41 - 2 ? cchName - 41 - 2 : 0, "", uFlatAddr, Sym.cb);
824	if (!fRc)
825	return false;
826
827	if (Sym.cb == 2)
828	fRc = disWordData(uFlatAddr, 2);
829	//else if (Sym.cb == 4 && disIsFarBiosAddr(uFlatAddr))
830	// fRc = disDWordData(uFlatAddr, 4);
831	else if (Sym.cb == 4)
832	fRc = disDWordData(uFlatAddr, 4);
833	else if (disIsString(uFlatAddr, Sym.cb))
834	fRc = disStringData(uFlatAddr, Sym.cb);
835	else
836	fRc = disByteData(uFlatAddr, Sym.cb);
837
838	uFlatAddr += Sym.cb;
839	cb -= Sym.cb;
840	}
841	else
842	{
843	fRc = disByteData(uFlatAddr, cb);
844	uFlatAddr += cb;
845	cb = 0;
846	}
847	if (!fRc)
848	return false;
849	}
850
851	return true;
852	}
853
854
855	static bool disIsCodeAndAdjustSize(uint32_t uFlatAddr, PRTDBGSYMBOL pSym, PBIOSSEG pSeg)
856	{
857	RT_NOREF_PV(uFlatAddr);
858
859	switch (g_enmBiosType)
860	{
861	/*
862	* This is for the PC BIOS.
863	*/
864	case kBiosType_System:
865	if (!strcmp(pSeg->szName, "BIOSSEG"))
866	{
867	if ( !strcmp(pSym->szName, "rom_fdpt")
868	\|\| !strcmp(pSym->szName, "pmbios_gdt")
869	\|\| !strcmp(pSym->szName, "pmbios_gdt_desc")
870	\|\| !strcmp(pSym->szName, "_pmode_IDT")
871	\|\| !strcmp(pSym->szName, "_rmode_IDT")
872	\|\| !strncmp(pSym->szName, RT_STR_TUPLE("font"))
873	\|\| !strcmp(pSym->szName, "bios_string")
874	\|\| !strcmp(pSym->szName, "vector_table")
875	\|\| !strcmp(pSym->szName, "pci_routing_table_structure")
876	\|\| !strcmp(pSym->szName, "_pci_routing_table")
877	)
878	return false;
879	}
880
881	if (!strcmp(pSym->szName, "cpu_reset"))
882	pSym->cb = RT_MIN(pSym->cb, 5);
883	else if (!strcmp(pSym->szName, "pci_init_end"))
884	pSym->cb = RT_MIN(pSym->cb, 3);
885	break;
886
887	/*
888	* This is for the VGA BIOS.
889	*/
890	case kBiosType_Vga:
891	break;
892	}
893
894	return true;
895	}
896
897
898	static bool disIs16BitCode(const char *pszSymbol)
899	{
900	RT_NOREF_PV(pszSymbol);
901	return true;
902	}
903
904
905	static bool disIsMemoryParameter(PCDISOPPARAM pParam, uint16_t fParam)
906	{
907	return fParam != OP_PARM_NONE
908	&& DISUSE_IS_EFFECTIVE_ADDR(pParam->fUse);
909	}
910
911
912	static bool disAccessesMemory(PCDISSTATE pDis)
913	{
914	PCDISOPCODE pCurInstr = pDis->pCurInstr;
915	return disIsMemoryParameter(&pDis->Param1, pCurInstr->fParam1)
916	\|\| disIsMemoryParameter(&pDis->Param2, pCurInstr->fParam2)
917	\|\| disIsMemoryParameter(&pDis->Param3, pCurInstr->fParam3)
918	\|\| disIsMemoryParameter(&pDis->Param4, pCurInstr->fParam4);
919	}
920
921
922	/**
923	* Deals with instructions that YASM will assemble differently than WASM/WCC.
924	*/
925	static size_t disHandleYasmDifferences(PDISSTATE pDis, uint32_t uFlatAddr, uint32_t cbInstr,
926	char *pszBuf, size_t cbBuf, size_t cchUsed)
927	{
928	bool fDifferent = DISFormatYasmIsOddEncoding(pDis);
929	uint8_t const *pb = &g_pbImg[uFlatAddr - g_uBiosFlatBase];
930
931	/*
932	* Disassembler bugs.
933	*/
934	/** @todo Group 1a and 11 seems to be disassembled incorrectly when
935	* modrm.reg != 0. Those encodings should be invalid AFAICT. */
936
937	if ( ( pDis->x86.bOpCode == 0x8f /* group 1a */
938	\|\| pDis->x86.bOpCode == 0xc7 /* group 11 */
939	\|\| pDis->x86.bOpCode == 0xc6 /* group 11 - not verified */
940	)
941	&& pDis->x86.ModRM.Bits.Reg != 0)
942	fDifferent = true;
943	/*
944	* Check these out and consider adding them to DISFormatYasmIsOddEncoding.
945	*/
946	else if ( pb[0] == 0xf3
947	&& pb[1] == 0x66
948	&& pb[2] == 0x6d)
949	fDifferent = true; /* rep insd - prefix switched. */
950	else if ( pb[0] == 0xc6
951	&& pb[1] == 0xc5
952	&& pb[2] == 0xba)
953	fDifferent = true; /* mov ch, 0bah - yasm uses a short sequence: 0xb5 0xba. */
954
955	/*
956	* 32-bit retf.
957	*/
958	else if ( pb[0] == 0x66
959	&& pb[1] == 0xcb)
960	fDifferent = true;
961
962	/*
963	* Handle different stuff.
964	*/
965	if (fDifferent)
966	{
967	disByteData(uFlatAddr, cbInstr); /* lazy bird. */
968
969	if (cchUsed + 2 < cbBuf)
970	{
971	memmove(pszBuf + 2, pszBuf, cchUsed + 1); /* include terminating \0 */
972	cchUsed += 2;
973	}
974
975	pszBuf[0] = ';';
976	pszBuf[1] = ' ';
977	}
978
979	return cchUsed;
980	}
981
982
983	/**
984	* @callback_method_impl{FNDISREADBYTES}
985	*
986	* @remarks @a uSrcAddr is the flat address.
987	*/
988	static DECLCALLBACK(int) disReadOpcodeBytes(PDISSTATE pDis, uint8_t offInstr, uint8_t cbMinRead, uint8_t cbMaxRead)
989	{
990	RT_NOREF_PV(cbMinRead);
991
992	RTUINTPTR offBios = pDis->uInstrAddr + offInstr - g_uBiosFlatBase;
993	size_t cbToRead = cbMaxRead;
994	if (offBios + cbToRead > g_cbImg)
995	{
996	if (offBios >= g_cbImg)
997	cbToRead = 0;
998	else
999	cbToRead = g_cbImg - offBios;
1000	}
1001	memcpy(&pDis->Instr.ab[offInstr], &g_pbImg[offBios], cbToRead);
1002	pDis->cbCachedInstr = (uint8_t)(offInstr + cbToRead);
1003	return VINF_SUCCESS;
1004	}
1005
1006
1007	/**
1008	* Disassembles code.
1009	*
1010	* @returns @c true on success, @c false on failure.
1011	* @param uFlatAddr The address where the code starts.
1012	* @param cb The amount of code to disassemble.
1013	* @param fIs16Bit Is is 16-bit (@c true) or 32-bit (@c false).
1014	*/
1015	static bool disCode(uint32_t uFlatAddr, uint32_t cb, bool fIs16Bit)
1016	{
1017	uint8_t const *pb = &g_pbImg[uFlatAddr - g_uBiosFlatBase];
1018
1019	while (cb > 0)
1020	{
1021	/* Trailing zero padding detection. */
1022	if ( *pb == '\0'
1023	&& ASMMemIsZero(pb, RT_MIN(cb, 8)))
1024	{
1025	void *pv = ASMMemFirstNonZero(pb, cb);
1026	uint32_t cbZeros = pv ? (uint32_t)((uint8_t const *)pv - pb) : cb;
1027	if (!outputPrintf(" times %#x db 0\n", cbZeros))
1028	return false;
1029	cb -= cbZeros;
1030	pb += cbZeros;
1031	uFlatAddr += cbZeros;
1032	if ( cb == 2
1033	&& pb[0] == 'X'
1034	&& pb[1] == 'M')
1035	return disStringData(uFlatAddr, cb);
1036	}
1037	/* Work arounds for switch tables and such (disas assertions). */
1038	else if ( 0
1039	\|\| ( pb[0] == 0x50 /* int13_cdemu switch */
1040	&& pb[1] == 0x4e
1041	&& pb[2] == 0x49
1042	&& pb[3] == 0x48
1043	&& pb[4] == 0x47
1044	)
1045	\|\| ( pb[0] == 0x8b /* _int13_harddisk_ext switch */
1046	&& pb[1] == 0x46
1047	&& pb[2] == 0x16
1048	&& pb[3] == 0x30
1049	&& pb[4] == 0xe8
1050	&& pb[5] == 0x80
1051	)
1052	\|\| ( pb[0] == 0xd8
1053	&& pb[1] == 0x5f
1054	&& pb[2] == 0x0b
1055	&& pb[3] == 0x60
1056	&& pb[4] == 0x0b
1057	&& pb[5] == 0x60
1058	)
1059	\|\| ( pb[0] == 0x67 /* _pci16_function switch */
1060	&& pb[1] == 0x92
1061	&& pb[2] == 0x81
1062	&& pb[3] == 0x92
1063	&& pb[4] == 0x94
1064	&& pb[5] == 0x92
1065	)
1066	\|\| ( pb[0] == 0xa3 /* _int1a_function switch */
1067	&& pb[1] == 0x67
1068	&& pb[2] == 0xca
1069	&& pb[3] == 0x67
1070	&& pb[4] == 0xef
1071	&& pb[5] == 0x67
1072	)
1073	\|\| ( pb[0] == 0x0b /* _ahci_init byte table */
1074	&& pb[1] == 0x05
1075	&& pb[2] == 0x04
1076	&& pb[3] == 0x03
1077	&& pb[4] == 0x02
1078	&& pb[5] == 0x01
1079	)
1080	\|\| ( pb[0] == 0x00 /* bytes after apm_out_str_ */
1081	&& pb[1] == 0x00
1082	&& pb[2] == 0x00
1083	&& pb[3] == 0x00
1084	&& pb[4] == 0x00
1085	&& pb[5] == 0x00
1086	&& pb[6] == 0xe0
1087	&& pb[7] == 0xa0
1088	&& pb[8] == 0xe2
1089	&& pb[9] == 0xa0
1090	)
1091	\|\| ( pb[0] == 0xf0 /* switch for apm_worker */
1092	&& pb[1] == 0xa0
1093	&& pb[2] == 0xf2
1094	&& pb[3] == 0xa0
1095	&& pb[4] == 0xf6
1096	&& pb[5] == 0xa0
1097	)
1098	\|\| ( pb[0] == 0xd4
1099	&& pb[1] == 0xc6
1100	&& pb[2] == 0xc5
1101	&& pb[3] == 0xba
1102	&& pb[4] == 0xb8
1103	&& pb[5] == 0xb6
1104	)
1105	\|\| ( pb[0] == 0xec /* _int15_function switch */
1106	&& pb[1] == 0xe9
1107	&& pb[2] == 0xd8
1108	&& pb[3] == 0xc1
1109	&& pb[4] == 0xc0
1110	&& pb[5] == 0xbf
1111	)
1112	\|\| ( pb[0] == 0x21 /* _int15_function32 switch */
1113	&& pb[1] == 0x66
1114	&& pb[2] == 0x43
1115	&& pb[3] == 0x66
1116	&& pb[4] == 0x66
1117	&& pb[5] == 0x66
1118	)
1119	\|\| ( pb[0] == 0xf0 /* int15_function_mouse switch */
1120	&& pb[1] == 0x75
1121	&& pb[2] == 0x66
1122	&& pb[3] == 0x76
1123	&& pb[4] == 0xe9
1124	&& pb[5] == 0x76
1125	)
1126	\|\| ( pb[0] == 0x60
1127	&& pb[1] == 0xa0
1128	&& pb[2] == 0x62
1129	&& pb[3] == 0xa0
1130	&& pb[4] == 0x66
1131	&& pb[5] == 0xa0
1132	)
1133	\|\| 0
1134	)
1135	return disByteData(uFlatAddr, cb);
1136	else
1137	{
1138	unsigned cbInstr;
1139	DISSTATE Dis;
1140	Dis.x86.ModRM.Bits.Mod = 3;
1141	int rc = DISInstrWithReader(uFlatAddr, fIs16Bit ? DISCPUMODE_16BIT : DISCPUMODE_32BIT,
1142	disReadOpcodeBytes, NULL, &Dis, &cbInstr);
1143	if ( RT_SUCCESS(rc)
1144	&& cbInstr <= cb
1145	&& Dis.pCurInstr
1146	&& Dis.pCurInstr->uOpcode != OP_INVALID
1147	&& Dis.pCurInstr->uOpcode != OP_ILLUD2
1148	&& ( !(Dis.x86.fPrefix & DISPREFIX_ADDRSIZE)
1149	\|\| disAccessesMemory(&Dis)))
1150	{
1151	char szTmp[4096];
1152	size_t cch = DISFormatYasmEx(&Dis, szTmp, sizeof(szTmp),
1153	DIS_FMT_FLAGS_STRICT
1154	\| DIS_FMT_FLAGS_BYTES_RIGHT \| DIS_FMT_FLAGS_BYTES_COMMENT \| DIS_FMT_FLAGS_BYTES_SPACED,
1155	NULL, NULL);
1156	cch = disHandleYasmDifferences(&Dis, uFlatAddr, cbInstr, szTmp, sizeof(szTmp), cch);
1157	Assert(cch < sizeof(szTmp));
1158
1159	if (g_cVerbose > 1)
1160	{
1161	while (cch < 72)
1162	szTmp[cch++] = ' ';
1163
1164	RTDBGLINE LineInfo = {0};
1165	RTINTPTR offLine = -1;
1166	int rcLine = RTDbgModLineByAddr(g_hSymMod, RTDBGSEGIDX_RVA, uFlatAddr - g_uBiosFlatBase, &offLine, &LineInfo);
1167	if (RT_SUCCESS(rcLine) && offLine == 0 && cch < sizeof(szTmp) - 16)
1168	RTStrPrintf(&szTmp[cch], sizeof(szTmp) - cch, "; %#x %Rbn:%u",
1169	uFlatAddr, LineInfo.szFilename, LineInfo.uLineNo);
1170	else
1171	RTStrPrintf(&szTmp[cch], sizeof(szTmp) - cch, "; %#x", uFlatAddr);
1172	}
1173
1174	if (!outputPrintf(" %s\n", szTmp))
1175	return false;
1176	cb -= cbInstr;
1177	pb += cbInstr;
1178	uFlatAddr += cbInstr;
1179	}
1180	else
1181	{
1182	if (!disByteData(uFlatAddr, 1))
1183	return false;
1184	cb--;
1185	pb++;
1186	uFlatAddr++;
1187	}
1188	}
1189	}
1190	return true;
1191	}
1192
1193
1194	static bool disCodeSegment(uint32_t iSeg)
1195	{
1196	uint32_t uFlatAddr = g_aSegs[iSeg].uFlatAddr;
1197	uint32_t cb = g_aSegs[iSeg].cb;
1198
1199	while (cb > 0)
1200	{
1201	uint32_t off;
1202	RTDBGSYMBOL Sym;
1203	disGetNextSymbol(uFlatAddr, cb, &off, &Sym);
1204
1205	if (off > 0)
1206	{
1207	if (!disByteData(uFlatAddr, off))
1208	return false;
1209	cb -= off;
1210	uFlatAddr += off;
1211	off = 0;
1212	if (!cb)
1213	break;
1214	}
1215
1216	bool fRc;
1217	if (off == 0)
1218	{
1219	size_t cchName = strlen(Sym.szName);
1220	fRc = outputPrintf("%s: %*s; %#x LB %#x\n", Sym.szName, cchName < 41 - 2 ? cchName - 41 - 2 : 0, "", uFlatAddr, Sym.cb);
1221	if (!fRc)
1222	return false;
1223
1224	if (disIsCodeAndAdjustSize(uFlatAddr, &Sym, &g_aSegs[iSeg]))
1225	fRc = disCode(uFlatAddr, Sym.cb, disIs16BitCode(Sym.szName));
1226	else
1227	fRc = disByteData(uFlatAddr, Sym.cb);
1228
1229	uFlatAddr += Sym.cb;
1230	cb -= Sym.cb;
1231	}
1232	else
1233	{
1234	fRc = disByteData(uFlatAddr, cb);
1235	uFlatAddr += cb;
1236	cb = 0;
1237	}
1238	if (!fRc)
1239	return false;
1240	}
1241
1242	return true;
1243	}
1244
1245
1246	static RTEXITCODE DisassembleBiosImage(void)
1247	{
1248	if (!disFileHeader())
1249	return RTEXITCODE_FAILURE;
1250
1251	/*
1252	* Work the image segment by segment.
1253	*/
1254	bool fRc = true;
1255	uint32_t uFlatAddr = g_uBiosFlatBase;
1256	for (uint32_t iSeg = 0; iSeg < g_cSegs && fRc; iSeg++)
1257	{
1258	/* Is there a gap between the segments? */
1259	if (uFlatAddr < g_aSegs[iSeg].uFlatAddr)
1260	{
1261	fRc = disCopySegmentGap(uFlatAddr, g_aSegs[iSeg].uFlatAddr - uFlatAddr);
1262	if (!fRc)
1263	break;
1264	uFlatAddr = g_aSegs[iSeg].uFlatAddr;
1265	}
1266	else if (uFlatAddr > g_aSegs[iSeg].uFlatAddr)
1267	return RTMsgErrorExit(RTEXITCODE_FAILURE, "Overlapping segments: %u and %u; uFlatAddr=%#x\n", iSeg - 1, iSeg, uFlatAddr);
1268
1269	/* Disassemble the segment. */
1270	fRc = outputPrintf("\n"
1271	"section %s progbits vstart=%#x align=1 ; size=%#x class=%s group=%s\n",
1272	g_aSegs[iSeg].szName, g_aSegs[iSeg].uFlatAddr - g_uBiosFlatBase,
1273	g_aSegs[iSeg].cb, g_aSegs[iSeg].szClass, g_aSegs[iSeg].szGroup);
1274	if (!fRc)
1275	return RTEXITCODE_FAILURE;
1276	if (!strcmp(g_aSegs[iSeg].szName, "CONST"))
1277	fRc = disConstSegment(iSeg);
1278	else if (!strcmp(g_aSegs[iSeg].szClass, "DATA"))
1279	fRc = disDataSegment(iSeg);
1280	else
1281	fRc = disCodeSegment(iSeg);
1282
1283	/* Advance. */
1284	uFlatAddr += g_aSegs[iSeg].cb;
1285	}
1286
1287	/* Final gap. */
1288	if (uFlatAddr < g_uBiosFlatBase + g_cbImg)
1289	fRc = disCopySegmentGap(uFlatAddr, (uint32_t)(g_uBiosFlatBase + g_cbImg - uFlatAddr));
1290	else if (uFlatAddr > g_uBiosFlatBase + g_cbImg)
1291	return RTMsgErrorExit(RTEXITCODE_FAILURE, "Last segment spills beyond 1MB; uFlatAddr=%#x\n", uFlatAddr);
1292
1293	if (!fRc)
1294	return RTEXITCODE_FAILURE;
1295	return RTEXITCODE_SUCCESS;
1296	}
1297
1298
1299
1300	/**
1301	* Parses the symbol file for the BIOS.
1302	*
1303	* This is in ELF/DWARF format.
1304	*
1305	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
1306	* @param pszBiosSym Path to the sym file.
1307	*/
1308	static RTEXITCODE ParseSymFile(const char *pszBiosSym)
1309	{
1310	int rc = RTDbgModCreateFromImage(&g_hSymMod, pszBiosSym, "VBoxBios", RTLDRARCH_WHATEVER, NIL_RTDBGCFG);
1311	if (RT_FAILURE(rc))
1312	return RTMsgErrorExit(RTEXITCODE_FAILURE, "Error opening '%s': %Rrc", pszBiosSym, rc);
1313
1314	if (g_cVerbose > 0)
1315	{
1316	/* Show segments */
1317	RTDBGSEGIDX cSegs = RTDbgModSegmentCount(g_hSymMod);
1318	for (RTDBGSEGIDX iSeg = 0; iSeg < cSegs; iSeg++)
1319	{
1320	RTDBGSEGMENT SegInfo;
1321	rc = RTDbgModSegmentByIndex(g_hSymMod, iSeg, &SegInfo);
1322	if (RT_SUCCESS(rc))
1323	RTMsgInfo("Seg#%u: %05RX64 LB %04RX64 rva %04RX64 %s\n", iSeg, SegInfo.Address, SegInfo.cb, SegInfo.uRva, SegInfo.szName);
1324	else
1325	RTMsgInfo("Seg#%u: RTDbgModSegmentByIndex -> %Rrc\n", iSeg, rc);
1326
1327	}
1328	}
1329	return RTEXITCODE_SUCCESS;
1330	}
1331
1332
1333	/**
1334	* Display an error with the mapfile name and current line, return false.
1335	*
1336	* @returns @c false.
1337	* @param pMap The map file handle.
1338	* @param pszFormat The format string.
1339	* @param ... Format arguments.
1340	*/
1341	static bool mapError(PBIOSMAP pMap, const char *pszFormat, ...)
1342	{
1343	va_list va;
1344	va_start(va, pszFormat);
1345	RTMsgError("%s:%d: %N", pMap->pszMapFile, pMap->iLine, pszFormat, &va);
1346	va_end(va);
1347	return false;
1348	}
1349
1350
1351	/**
1352	* Reads a line from the file.
1353	*
1354	* @returns @c true on success, @c false + msg on failure, @c false on eof.
1355	* @param pMap The map file handle.
1356	*/
1357	static bool mapReadLine(PBIOSMAP pMap)
1358	{
1359	int rc = RTStrmGetLine(pMap->hStrm, pMap->szLine, sizeof(pMap->szLine));
1360	if (RT_FAILURE(rc))
1361	{
1362	if (rc == VERR_EOF)
1363	{
1364	pMap->fEof = true;
1365	pMap->cch = 0;
1366	pMap->offNW = 0;
1367	pMap->szLine[0] = '\0';
1368	}
1369	else
1370	RTMsgError("%s:%d: Read error %Rrc", pMap->pszMapFile, pMap->iLine + 1, rc);
1371	return false;
1372	}
1373	pMap->iLine++;
1374	pMap->cch = (uint32_t)strlen(pMap->szLine);
1375
1376	/* Check out leading white space. */
1377	if (!RT_C_IS_SPACE(pMap->szLine[0]))
1378	pMap->offNW = 0;
1379	else
1380	{
1381	uint32_t off = 1;
1382	while (RT_C_IS_SPACE(pMap->szLine[off]))
1383	off++;
1384	pMap->offNW = off;
1385	}
1386
1387	return true;
1388	}
1389
1390
1391	/**
1392	* Checks if it is an empty line.
1393	* @returns @c true if empty, @c false if not.
1394	* @param pMap The map file handle.
1395	*/
1396	static bool mapIsEmptyLine(PBIOSMAP pMap)
1397	{
1398	Assert(pMap->offNW <= pMap->cch);
1399	return pMap->offNW == pMap->cch;
1400	}
1401
1402
1403	/**
1404	* Reads ahead in the map file until a non-empty line or EOF is encountered.
1405	*
1406	* @returns @c true on success, @c false + msg on failure, @c false on eof.
1407	* @param pMap The map file handle.
1408	*/
1409	static bool mapSkipEmptyLines(PBIOSMAP pMap)
1410	{
1411	for (;;)
1412	{
1413	if (!mapReadLine(pMap))
1414	return false;
1415	if (pMap->offNW < pMap->cch)
1416	return true;
1417	}
1418	}
1419
1420
1421	/**
1422	* Reads ahead in the map file until an empty line or EOF is encountered.
1423	*
1424	* @returns @c true on success, @c false + msg on failure, @c false on eof.
1425	* @param pMap The map file handle.
1426	*/
1427	static bool mapSkipNonEmptyLines(PBIOSMAP pMap)
1428	{
1429	for (;;)
1430	{
1431	if (!mapReadLine(pMap))
1432	return false;
1433	if (pMap->offNW == pMap->cch)
1434	return true;
1435	}
1436	}
1437
1438
1439	/**
1440	* Strips the current line.
1441	*
1442	* The string length may change.
1443	*
1444	* @returns Pointer to the first non-space character.
1445	* @param pMap The map file handle.
1446	* @param pcch Where to return the length of the unstripped
1447	* part. Optional.
1448	*/
1449	static char mapStripCurrentLine(PBIOSMAP pMap, size_t pcch)
1450	{
1451	char *psz = &pMap->szLine[pMap->offNW];
1452	char *pszEnd = &pMap->szLine[pMap->cch];
1453	while ( (uintptr_t)pszEnd > (uintptr_t)psz
1454	&& RT_C_IS_SPACE(pszEnd[-1]))
1455	{
1456	*--pszEnd = '\0';
1457	pMap->cch--;
1458	}
1459	if (pcch)
1460	*pcch = pszEnd - psz;
1461	return psz;
1462	}
1463
1464
1465	/**
1466	* Reads a line from the file and right strips it.
1467	*
1468	* @returns Pointer to szLine on success, @c NULL + msg on failure, @c NULL on
1469	* EOF.
1470	* @param pMap The map file handle.
1471	* @param pcch Where to return the length of the unstripped
1472	* part. Optional.
1473	*/
1474	static char mapReadLineStripRight(PBIOSMAP pMap, size_t pcch)
1475	{
1476	if (!mapReadLine(pMap))
1477	return NULL;
1478	mapStripCurrentLine(pMap, NULL);
1479	if (pcch)
1480	*pcch = pMap->cch;
1481	return pMap->szLine;
1482	}
1483
1484
1485	/**
1486	* mapReadLine() + mapStripCurrentLine().
1487	*
1488	* @returns Pointer to the first non-space character in the new line. NULL on
1489	* read error (bitched already) or end of file.
1490	* @param pMap The map file handle.
1491	* @param pcch Where to return the length of the unstripped
1492	* part. Optional.
1493	*/
1494	static char mapReadLineStrip(PBIOSMAP pMap, size_t pcch)
1495	{
1496	if (!mapReadLine(pMap))
1497	return NULL;
1498	return mapStripCurrentLine(pMap, pcch);
1499	}
1500
1501
1502	/**
1503	* Parses a word, copying it into the supplied buffer, and skipping any spaces
1504	* following it.
1505	*
1506	* @returns @c true on success, @c false on failure.
1507	* @param ppszCursor Pointer to the cursor variable.
1508	* @param pszBuf The output buffer.
1509	* @param cbBuf The size of the output buffer.
1510	*/
1511	static bool mapParseWord(char *ppszCursor, char pszBuf, size_t cbBuf)
1512	{
1513	/* Check that we start on a non-blank. */
1514	char pszStart = ppszCursor;
1515	if (!pszStart \|\| RT_C_IS_SPACE(pszStart))
1516	return false;
1517
1518	/* Find the end of the word. */
1519	char *psz = pszStart + 1;
1520	while (psz && !RT_C_IS_SPACE(psz))
1521	psz++;
1522
1523	/* Copy it. */
1524	size_t cchWord = (uintptr_t)psz - (uintptr_t)pszStart;
1525	if (cchWord >= cbBuf)
1526	return false;
1527	memcpy(pszBuf, pszStart, cchWord);
1528	pszBuf[cchWord] = '\0';
1529
1530	/* Skip blanks following it. */
1531	while (RT_C_IS_SPACE(*psz))
1532	psz++;
1533	*ppszCursor = psz;
1534	return true;
1535	}
1536
1537
1538	/**
1539	* Parses an 16:16 address.
1540	*
1541	* @returns @c true on success, @c false on failure.
1542	* @param ppszCursor Pointer to the cursor variable.
1543	* @param pAddr Where to return the address.
1544	*/
1545	static bool mapParseAddress(char **ppszCursor, PRTFAR16 pAddr)
1546	{
1547	char szWord[32];
1548	if (!mapParseWord(ppszCursor, szWord, sizeof(szWord)))
1549	return false;
1550	size_t cchWord = strlen(szWord);
1551
1552	/* An address is at least 16:16 format. It may be 16:32. It may also be flagged. */
1553	size_t cchAddr = 4 + 1 + 4;
1554	if (cchWord < cchAddr)
1555	return false;
1556	if ( !RT_C_IS_XDIGIT(szWord[0])
1557	\|\| !RT_C_IS_XDIGIT(szWord[1])
1558	\|\| !RT_C_IS_XDIGIT(szWord[2])
1559	\|\| !RT_C_IS_XDIGIT(szWord[3])
1560	\|\| szWord[4] != ':'
1561	\|\| !RT_C_IS_XDIGIT(szWord[5])
1562	\|\| !RT_C_IS_XDIGIT(szWord[6])
1563	\|\| !RT_C_IS_XDIGIT(szWord[7])
1564	\|\| !RT_C_IS_XDIGIT(szWord[8])
1565	)
1566	return false;
1567	if ( cchWord > cchAddr
1568	&& RT_C_IS_XDIGIT(szWord[9])
1569	&& RT_C_IS_XDIGIT(szWord[10])
1570	&& RT_C_IS_XDIGIT(szWord[11])
1571	&& RT_C_IS_XDIGIT(szWord[12]))
1572	cchAddr += 4;
1573
1574	/* Drop flag if present. */
1575	if (cchWord > cchAddr)
1576	{
1577	if (RT_C_IS_XDIGIT(szWord[cchAddr]))
1578	return false;
1579	szWord[cchAddr] = '\0';
1580	cchWord = cchAddr;
1581	}
1582
1583	/* Convert it. */
1584	szWord[4] = '\0';
1585	int rc1 = RTStrToUInt16Full(szWord, 16, &pAddr->sel);
1586	if (rc1 != VINF_SUCCESS)
1587	return false;
1588
1589	int rc2 = RTStrToUInt16Full(szWord + 5, 16, &pAddr->off);
1590	if (rc2 != VINF_SUCCESS)
1591	return false;
1592	return true;
1593	}
1594
1595
1596	/**
1597	* Parses a size.
1598	*
1599	* @returns @c true on success, @c false on failure.
1600	* @param ppszCursor Pointer to the cursor variable.
1601	* @param pcb Where to return the size.
1602	*/
1603	static bool mapParseSize(char *ppszCursor, uint32_t pcb)
1604	{
1605	char szWord[32];
1606	if (!mapParseWord(ppszCursor, szWord, sizeof(szWord)))
1607	return false;
1608	size_t cchWord = strlen(szWord);
1609	if (cchWord != 8)
1610	return false;
1611
1612	int rc = RTStrToUInt32Full(szWord, 16, pcb);
1613	if (rc != VINF_SUCCESS)
1614	return false;
1615	return true;
1616	}
1617
1618
1619	/**
1620	* Parses a section box and the following column header.
1621	*
1622	* @returns @c true on success, @c false + msg on failure, @c false on eof.
1623	* @param pMap Map file handle.
1624	* @param pszSectionNm The expected section name.
1625	* @param cColumns The number of columns.
1626	* @param ... The column names.
1627	*/
1628	static bool mapSkipThruColumnHeadings(PBIOSMAP pMap, const char *pszSectionNm, uint32_t cColumns, ...)
1629	{
1630	if ( mapIsEmptyLine(pMap)
1631	&& !mapSkipEmptyLines(pMap))
1632	return false;
1633
1634	/* +------------+ */
1635	size_t cch;
1636	char *psz = mapStripCurrentLine(pMap, &cch);
1637	if (!psz)
1638	return false;
1639
1640	if ( psz[0] != '+'
1641	\|\| psz[1] != '-'
1642	\|\| psz[2] != '-'
1643	\|\| psz[3] != '-'
1644	\|\| psz[cch - 4] != '-'
1645	\|\| psz[cch - 3] != '-'
1646	\|\| psz[cch - 2] != '-'
1647	\|\| psz[cch - 1] != '+'
1648	)
1649	{
1650	RTMsgError("%s:%d: Expected section box: +-----...", pMap->pszMapFile, pMap->iLine);
1651	return false;
1652	}
1653
1654	/* \| pszSectionNm \| */
1655	psz = mapReadLineStrip(pMap, &cch);
1656	if (!psz)
1657	return false;
1658
1659	size_t cchSectionNm = strlen(pszSectionNm);
1660	if ( psz[0] != '\|'
1661	\|\| psz[1] != ' '
1662	\|\| psz[2] != ' '
1663	\|\| psz[3] != ' '
1664	\|\| psz[cch - 4] != ' '
1665	\|\| psz[cch - 3] != ' '
1666	\|\| psz[cch - 2] != ' '
1667	\|\| psz[cch - 1] != '\|'
1668	\|\| cch != 1 + 3 + cchSectionNm + 3 + 1
1669	\|\| strncmp(&psz[4], pszSectionNm, cchSectionNm)
1670	)
1671	{
1672	RTMsgError("%s:%d: Expected section box: \| %s \|", pMap->pszMapFile, pMap->iLine, pszSectionNm);
1673	return false;
1674	}
1675
1676	/* +------------+ */
1677	psz = mapReadLineStrip(pMap, &cch);
1678	if (!psz)
1679	return false;
1680	if ( psz[0] != '+'
1681	\|\| psz[1] != '-'
1682	\|\| psz[2] != '-'
1683	\|\| psz[3] != '-'
1684	\|\| psz[cch - 4] != '-'
1685	\|\| psz[cch - 3] != '-'
1686	\|\| psz[cch - 2] != '-'
1687	\|\| psz[cch - 1] != '+'
1688	)
1689	{
1690	RTMsgError("%s:%d: Expected section box: +-----...", pMap->pszMapFile, pMap->iLine);
1691	return false;
1692	}
1693
1694	/* There may be a few lines describing the table notation now, surrounded by blank lines. */
1695	do
1696	{
1697	psz = mapReadLineStripRight(pMap, &cch);
1698	if (!psz)
1699	return false;
1700	} while ( *psz == '\0'
1701	\|\| ( !RT_C_IS_SPACE(psz[0])
1702	&& RT_C_IS_SPACE(psz[1])
1703	&& psz[2] == '='
1704	&& RT_C_IS_SPACE(psz[3]))
1705	);
1706
1707	/* Should have the column heading now. */
1708	va_list va;
1709	va_start(va, cColumns);
1710	for (uint32_t i = 0; i < cColumns; i++)
1711	{
1712	const char pszColumn = va_arg(va, const char );
1713	size_t cchColumn = strlen(pszColumn);
1714	if ( strncmp(psz, pszColumn, cchColumn)
1715	\|\| ( psz[cchColumn] != '\0'
1716	&& !RT_C_IS_SPACE(psz[cchColumn])))
1717	{
1718	va_end(va);
1719	RTMsgError("%s:%d: Expected column '%s' found '%s'", pMap->pszMapFile, pMap->iLine, pszColumn, psz);
1720	return false;
1721	}
1722	psz += cchColumn;
1723	while (RT_C_IS_SPACE(*psz))
1724	psz++;
1725	}
1726	va_end(va);
1727
1728	/* The next line is the underlining. */
1729	psz = mapReadLineStripRight(pMap, &cch);
1730	if (!psz)
1731	return false;
1732	if (*psz != '=' \|\| psz[cch - 1] != '=')
1733	{
1734	RTMsgError("%s:%d: Expected column header underlining", pMap->pszMapFile, pMap->iLine);
1735	return false;
1736	}
1737
1738	/* Skip one blank line. */
1739	psz = mapReadLineStripRight(pMap, &cch);
1740	if (!psz)
1741	return false;
1742	if (*psz)
1743	{
1744	RTMsgError("%s:%d: Expected blank line beneath the column headers", pMap->pszMapFile, pMap->iLine);
1745	return false;
1746	}
1747
1748	return true;
1749	}
1750
1751
1752	/**
1753	* Parses a segment list.
1754	*
1755	* @returns @c true on success, @c false + msg on failure, @c false on eof.
1756	* @param pMap The map file handle.
1757	*/
1758	static bool mapParseSegments(PBIOSMAP pMap)
1759	{
1760	for (;;)
1761	{
1762	if (!mapReadLineStripRight(pMap, NULL))
1763	return false;
1764
1765	/* The end? The line should be empty. Expectes segment name to not
1766	start with a space. */
1767	if (!pMap->szLine[0] \|\| RT_C_IS_SPACE(pMap->szLine[0]))
1768	{
1769	if (!pMap->szLine[0])
1770	return true;
1771	RTMsgError("%s:%u: Malformed segment line", pMap->pszMapFile, pMap->iLine);
1772	return false;
1773	}
1774
1775	/* Parse the segment line. */
1776	uint32_t iSeg = g_cSegs;
1777	if (iSeg >= RT_ELEMENTS(g_aSegs))
1778	{
1779	RTMsgError("%s:%u: Too many segments", pMap->pszMapFile, pMap->iLine);
1780	return false;
1781	}
1782
1783	char *psz = pMap->szLine;
1784	if (!mapParseWord(&psz, g_aSegs[iSeg].szName, sizeof(g_aSegs[iSeg].szName)))
1785	RTMsgError("%s:%u: Segment name parser error", pMap->pszMapFile, pMap->iLine);
1786	else if (!mapParseWord(&psz, g_aSegs[iSeg].szClass, sizeof(g_aSegs[iSeg].szClass)))
1787	RTMsgError("%s:%u: Segment class parser error", pMap->pszMapFile, pMap->iLine);
1788	else if (!mapParseWord(&psz, g_aSegs[iSeg].szGroup, sizeof(g_aSegs[iSeg].szGroup)))
1789	RTMsgError("%s:%u: Segment group parser error", pMap->pszMapFile, pMap->iLine);
1790	else if (!mapParseAddress(&psz, &g_aSegs[iSeg].Address))
1791	RTMsgError("%s:%u: Segment address parser error", pMap->pszMapFile, pMap->iLine);
1792	else if (!mapParseSize(&psz, &g_aSegs[iSeg].cb))
1793	RTMsgError("%s:%u: Segment size parser error", pMap->pszMapFile, pMap->iLine);
1794	else
1795	{
1796	g_aSegs[iSeg].uFlatAddr = ((uint32_t)g_aSegs[iSeg].Address.sel << 4) + g_aSegs[iSeg].Address.off;
1797	g_cSegs++;
1798	if (g_cVerbose > 2)
1799	RTStrmPrintf(g_pStdErr, "read segment at %08x / %04x:%04x LB %04x %s / %s / %s\n",
1800	g_aSegs[iSeg].uFlatAddr,
1801	g_aSegs[iSeg].Address.sel,
1802	g_aSegs[iSeg].Address.off,
1803	g_aSegs[iSeg].cb,
1804	g_aSegs[iSeg].szName,
1805	g_aSegs[iSeg].szClass,
1806	g_aSegs[iSeg].szGroup);
1807
1808	while (RT_C_IS_SPACE(*psz))
1809	psz++;
1810	if (!*psz)
1811	continue;
1812	RTMsgError("%s:%u: Junk at end of line", pMap->pszMapFile, pMap->iLine);
1813	}
1814	return false;
1815	}
1816	}
1817
1818
1819	/**
1820	* Sorts the segment array by flat address and adds them to the debug module.
1821	*
1822	* @returns @c true on success, @c false + msg on failure, @c false on eof.
1823	*/
1824	static bool mapSortAndAddSegments(void)
1825	{
1826	for (uint32_t i = 0; i < g_cSegs; i++)
1827	{
1828	for (uint32_t j = i + 1; j < g_cSegs; j++)
1829	if (g_aSegs[j].uFlatAddr < g_aSegs[i].uFlatAddr)
1830	{
1831	BIOSSEG Tmp = g_aSegs[i];
1832	g_aSegs[i] = g_aSegs[j];
1833	g_aSegs[j] = Tmp;
1834	}
1835	g_aSegs[i].uRva = g_aSegs[i].uFlatAddr - g_aSegs[0].uFlatAddr;
1836
1837	if (g_cVerbose > 0)
1838	RTStrmPrintf(g_pStdErr, "segment at %08x / %04x / %04x:%04x LB %04x %s / %s / %s\n",
1839	g_aSegs[i].uFlatAddr,
1840	g_aSegs[i].uRva,
1841	g_aSegs[i].Address.sel,
1842	g_aSegs[i].Address.off,
1843	g_aSegs[i].cb,
1844	g_aSegs[i].szName,
1845	g_aSegs[i].szClass,
1846	g_aSegs[i].szGroup);
1847
1848	RTDBGSEGIDX idx = i;
1849	int rc = RTDbgModSegmentAdd(g_hMapMod, g_aSegs[i].uFlatAddr, g_aSegs[i].cb, g_aSegs[i].szName, 0 /fFlags/, &idx);
1850	if (RT_FAILURE(rc))
1851	{
1852	RTMsgError("RTDbgModSegmentAdd failed on %s: %Rrc", g_aSegs[i].szName);
1853	return false;
1854	}
1855	}
1856	return true;
1857	}
1858
1859
1860	/**
1861	* Parses a segment list.
1862	*
1863	* @returns @c true on success, @c false + msg on failure, @c false on eof.
1864	* @param pMap The map file handle.
1865	*/
1866	static bool mapParseSymbols(PBIOSMAP pMap)
1867	{
1868	for (;;)
1869	{
1870	if (!mapReadLineStripRight(pMap, NULL))
1871	return false;
1872
1873	/* The end? The line should be empty. Expectes segment name to not
1874	start with a space. */
1875	if (!pMap->szLine[0] \|\| RT_C_IS_SPACE(pMap->szLine[0]))
1876	{
1877	if (!pMap->szLine[0])
1878	return true;
1879	return mapError(pMap, "Malformed symbol line");
1880	}
1881
1882	if (!strncmp(pMap->szLine, RT_STR_TUPLE("Module: ")))
1883	{
1884	/* Parse the module line. */
1885	size_t offObj = sizeof("Module: ") - 1;
1886	while (RT_C_IS_SPACE(pMap->szLine[offObj]))
1887	offObj++;
1888	size_t offSrc = offObj;
1889	char ch;
1890	while ((ch = pMap->szLine[offSrc]) != '(' && ch != '\0')
1891	offSrc++;
1892	size_t cchObj = offSrc - offObj;
1893
1894	offSrc++;
1895	size_t cchSrc = offSrc;
1896	while ((ch = pMap->szLine[cchSrc]) != ')' && ch != '\0')
1897	cchSrc++;
1898	cchSrc -= offSrc;
1899	if (ch != ')')
1900	return mapError(pMap, "Symbol/Module line parse error");
1901
1902	PBIOSOBJFILE pObjFile = (PBIOSOBJFILE)RTMemAllocZ(sizeof(*pObjFile) + cchSrc + cchObj + 2);
1903	if (!pObjFile)
1904	return mapError(pMap, "Out of memory");
1905	char psz = (char )(pObjFile + 1);
1906	pObjFile->pszObject = psz;
1907	memcpy(psz, &pMap->szLine[offObj], cchObj);
1908	psz += cchObj;
1909	*psz++ = '\0';
1910	pObjFile->pszSource = psz;
1911	memcpy(psz, &pMap->szLine[offSrc], cchSrc);
1912	psz[cchSrc] = '\0';
1913	RTListAppend(&g_ObjList, &pObjFile->Node);
1914	}
1915	else
1916	{
1917	/* Parse the segment line. */
1918	RTFAR16 Addr;
1919	char *psz = pMap->szLine;
1920	if (!mapParseAddress(&psz, &Addr))
1921	return mapError(pMap, "Symbol address parser error");
1922
1923	char szName[4096];
1924	if (!mapParseWord(&psz, szName, sizeof(szName)))
1925	return mapError(pMap, "Symbol name parser error");
1926
1927	uint32_t uFlatAddr = ((uint32_t)Addr.sel << 4) + Addr.off;
1928	if (uFlatAddr != 0)
1929	{
1930	int rc = RTDbgModSymbolAdd(g_hMapMod, szName, RTDBGSEGIDX_RVA, uFlatAddr, 0 /cb/, 0 /fFlags/, NULL);
1931	if (RT_FAILURE(rc) && rc != VERR_DBG_ADDRESS_CONFLICT)
1932	{
1933	/* HACK ALERT! For dealing with lables at segment size. / /* @todo fix end labels. */
1934	rc = RTDbgModSymbolAdd(g_hMapMod, szName, RTDBGSEGIDX_RVA, uFlatAddr - 1, 0 /cb/, 0 /fFlags/, NULL);
1935	if (RT_FAILURE(rc) && rc != VERR_DBG_ADDRESS_CONFLICT)
1936	return mapError(pMap, "RTDbgModSymbolAdd failed: %Rrc", rc);
1937	}
1938
1939	if (g_cVerbose > 2)
1940	RTStrmPrintf(g_pStdErr, "read symbol - %08x %s\n", uFlatAddr, szName);
1941	while (RT_C_IS_SPACE(*psz))
1942	psz++;
1943	if (*psz)
1944	return mapError(pMap, "Junk at end of line");
1945	}
1946
1947	}
1948	}
1949	}
1950
1951
1952	/**
1953	* Parses the given map file.
1954	*
1955	* @returns RTEXITCODE_SUCCESS and lots of globals, or RTEXITCODE_FAILURE and a
1956	* error message.
1957	* @param pMap The map file handle.
1958	*/
1959	static RTEXITCODE mapParseFile(PBIOSMAP pMap)
1960	{
1961	int rc = RTDbgModCreate(&g_hMapMod, "VBoxBios", 0 /cbSeg/, 0 /fFlags/);
1962	if (RT_FAILURE(rc))
1963	return RTMsgErrorExit(RTEXITCODE_FAILURE, "RTDbgModCreate failed: %Rrc", rc);
1964
1965	/*
1966	* Read the header.
1967	*/
1968	if (!mapReadLine(pMap))
1969	return RTEXITCODE_FAILURE;
1970	if (strncmp(pMap->szLine, RT_STR_TUPLE("Open Watcom Linker Version")))
1971	return RTMsgErrorExit(RTEXITCODE_FAILURE, "Unexpected map-file header: '%s'", pMap->szLine);
1972	if ( !mapSkipNonEmptyLines(pMap)
1973	\|\| !mapSkipEmptyLines(pMap))
1974	return RTEXITCODE_FAILURE;
1975
1976	/*
1977	* Skip groups.
1978	*/
1979	if (!mapSkipThruColumnHeadings(pMap, "Groups", 3, "Group", "Address", "Size", NULL))
1980	return RTEXITCODE_FAILURE;
1981	if (!mapSkipNonEmptyLines(pMap))
1982	return RTEXITCODE_FAILURE;
1983
1984	/*
1985	* Parse segments.
1986	*/
1987	if (!mapSkipThruColumnHeadings(pMap, "Segments", 5, "Segment", "Class", "Group", "Address", "Size"))
1988	return RTEXITCODE_FAILURE;
1989	if (!mapParseSegments(pMap))
1990	return RTEXITCODE_FAILURE;
1991	if (!mapSortAndAddSegments())
1992	return RTEXITCODE_FAILURE;
1993
1994	/*
1995	* Parse symbols.
1996	*/
1997	if (!mapSkipThruColumnHeadings(pMap, "Memory Map", 2, "Address", "Symbol"))
1998	return RTEXITCODE_FAILURE;
1999	if (!mapParseSymbols(pMap))
2000	return RTEXITCODE_FAILURE;
2001
2002	/* Ignore the rest of the file. */
2003	return RTEXITCODE_SUCCESS;
2004	}
2005
2006
2007	/**
2008	* Parses the linker map file for the BIOS.
2009	*
2010	* This is generated by the Watcom linker.
2011	*
2012	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
2013	* @param pszBiosMap Path to the map file.
2014	*/
2015	static RTEXITCODE ParseMapFile(const char *pszBiosMap)
2016	{
2017	BIOSMAP Map;
2018	Map.pszMapFile = pszBiosMap;
2019	Map.hStrm = NULL;
2020	Map.iLine = 0;
2021	Map.fEof = false;
2022	Map.cch = 0;
2023	Map.offNW = 0;
2024	int rc = RTStrmOpen(pszBiosMap, "r", &Map.hStrm);
2025	if (RT_FAILURE(rc))
2026	return RTMsgErrorExit(RTEXITCODE_FAILURE, "Error opening '%s': %Rrc", pszBiosMap, rc);
2027	RTEXITCODE rcExit = mapParseFile(&Map);
2028	RTStrmClose(Map.hStrm);
2029	return rcExit;
2030	}
2031
2032
2033	/**
2034	* Reads the BIOS image into memory (g_pbImg and g_cbImg).
2035	*
2036	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
2037	* @param pszBiosImg Path to the image file.
2038	*/
2039	static RTEXITCODE ReadBiosImage(const char *pszBiosImg)
2040	{
2041	void *pvImg;
2042	size_t cbImg;
2043	int rc = RTFileReadAll(pszBiosImg, &pvImg, &cbImg);
2044	if (RT_FAILURE(rc))
2045	return RTMsgErrorExit(RTEXITCODE_FAILURE, "Error reading '%s': %Rrc", pszBiosImg, rc);
2046
2047	size_t cbImgExpect;
2048	switch (g_enmBiosType)
2049	{
2050	case kBiosType_System: cbImgExpect = _64K; break;
2051	case kBiosType_Vga: cbImgExpect = _32K; break;
2052	default: cbImgExpect = 0; break;
2053	}
2054	if (cbImg != cbImgExpect)
2055	{
2056	RTFileReadAllFree(pvImg, cbImg);
2057	return RTMsgErrorExit(RTEXITCODE_FAILURE, "The BIOS image %u bytes intead of %u bytes", cbImg, cbImgExpect);
2058	}
2059
2060	g_pbImg = (uint8_t *)pvImg;
2061	g_cbImg = cbImg;
2062	return RTEXITCODE_SUCCESS;
2063	}
2064
2065
2066	int main(int argc, char **argv)
2067	{
2068	int rc = RTR3InitExe(argc, &argv, 0);
2069	if (RT_FAILURE(rc))
2070	return RTMsgInitFailure(rc);
2071
2072	RTListInit(&g_ObjList);
2073
2074	/*
2075	* Option config.
2076	*/
2077	static RTGETOPTDEF const s_aOpts[] =
2078	{
2079	{ "--bios-image", 'i', RTGETOPT_REQ_STRING },
2080	{ "--bios-map", 'm', RTGETOPT_REQ_STRING },
2081	{ "--bios-sym", 's', RTGETOPT_REQ_STRING },
2082	{ "--bios-type", 't', RTGETOPT_REQ_STRING },
2083	{ "--output", 'o', RTGETOPT_REQ_STRING },
2084	{ "--verbose", 'v', RTGETOPT_REQ_NOTHING },
2085	{ "--quiet", 'q', RTGETOPT_REQ_NOTHING },
2086	};
2087
2088	const char *pszBiosMap = NULL;
2089	const char *pszBiosSym = NULL;
2090	const char *pszBiosImg = NULL;
2091	const char *pszOutput = NULL;
2092
2093	RTGETOPTUNION ValueUnion;
2094	RTGETOPTSTATE GetOptState;
2095	rc = RTGetOptInit(&GetOptState, argc, argv, &s_aOpts[0], RT_ELEMENTS(s_aOpts), 1, RTGETOPTINIT_FLAGS_OPTS_FIRST);
2096	AssertReleaseRCReturn(rc, RTEXITCODE_FAILURE);
2097
2098	/*
2099	* Process the options.
2100	*/
2101	while ((rc = RTGetOpt(&GetOptState, &ValueUnion)) != 0)
2102	{
2103	switch (rc)
2104	{
2105	case 'i':
2106	if (pszBiosImg)
2107	return RTMsgErrorExit(RTEXITCODE_SYNTAX, "--bios-image is given more than once");
2108	pszBiosImg = ValueUnion.psz;
2109	break;
2110
2111	case 'm':
2112	if (pszBiosMap)
2113	return RTMsgErrorExit(RTEXITCODE_SYNTAX, "--bios-map is given more than once");
2114	pszBiosMap = ValueUnion.psz;
2115	break;
2116
2117	case 's':
2118	if (pszBiosSym)
2119	return RTMsgErrorExit(RTEXITCODE_SYNTAX, "--bios-sym is given more than once");
2120	pszBiosSym = ValueUnion.psz;
2121	break;
2122
2123	case 'o':
2124	if (pszOutput)
2125	return RTMsgErrorExit(RTEXITCODE_SYNTAX, "--output is given more than once");
2126	pszOutput = ValueUnion.psz;
2127	break;
2128
2129	case 't':
2130	if (!strcmp(ValueUnion.psz, "system"))
2131	{
2132	g_enmBiosType = kBiosType_System;
2133	g_uBiosFlatBase = 0xf0000;
2134	}
2135	else if (!strcmp(ValueUnion.psz, "vga"))
2136	{
2137	g_enmBiosType = kBiosType_Vga;
2138	g_uBiosFlatBase = 0xc0000;
2139	}
2140	else
2141	return RTMsgErrorExit(RTEXITCODE_SYNTAX, "Unknown bios type '%s'", ValueUnion.psz);
2142	break;
2143
2144	case 'v':
2145	g_cVerbose++;
2146	break;
2147
2148	case 'q':
2149	g_cVerbose = 0;
2150	break;
2151
2152	case 'H':
2153	RTPrintf("usage: %Rbn --bios-image <file.img> --bios-map <file.map> [--output <file.asm>]\n",
2154	argv[0]);
2155	return RTEXITCODE_SUCCESS;
2156
2157	case 'V':
2158	{
2159	/* The following is assuming that svn does it's job here. */
2160	char szRev[] = "$Revision: 101539 $";
2161	char *psz = szRev;
2162	while (psz && !RT_C_IS_DIGIT(psz))
2163	psz++;
2164	size_t i = strlen(psz);
2165	while (i > 0 && !RT_C_IS_DIGIT(psz[i - 1]))
2166	psz[--i] = '\0';
2167
2168	RTPrintf("r%s\n", psz);
2169	return RTEXITCODE_SUCCESS;
2170	}
2171
2172	default:
2173	return RTGetOptPrintError(rc, &ValueUnion);
2174	}
2175	}
2176
2177	/*
2178	* Got it all?
2179	*/
2180	if (!pszBiosImg)
2181	return RTMsgErrorExit(RTEXITCODE_SYNTAX, "--bios-image is required");
2182	if (!pszBiosMap)
2183	return RTMsgErrorExit(RTEXITCODE_SYNTAX, "--bios-map is required");
2184	if (!pszBiosSym)
2185	return RTMsgErrorExit(RTEXITCODE_SYNTAX, "--bios-sym is required");
2186
2187	/*
2188	* Do the job.
2189	*/
2190	RTEXITCODE rcExit;
2191	rcExit = ReadBiosImage(pszBiosImg);
2192	if (rcExit == RTEXITCODE_SUCCESS)
2193	rcExit = ParseMapFile(pszBiosMap);
2194	if (rcExit == RTEXITCODE_SUCCESS)
2195	rcExit = ParseSymFile(pszBiosSym);
2196	if (rcExit == RTEXITCODE_SUCCESS)
2197	rcExit = OpenOutputFile(pszOutput);
2198	if (rcExit == RTEXITCODE_SUCCESS)
2199	rcExit = DisassembleBiosImage();
2200
2201	return rcExit;
2202	}
2203

Note: See TracBrowser for help on using the repository browser.

source: vbox/trunk/src/VBox/Devices/BiosCommonCode/MakeAlternativeSource.cpp@ 101539

Download in other formats: