MakeAlternativeSource.cpp@ 105381

Last change on this file since 105381 was 103005, checked in by vboxsync, 10 months ago
iprt/asm.h,: Split out the ASMMem and related stuff into a separate header, asm-mem.h, so that we can get the RT_ASM_PAGE_SIZE stuff out of the way.
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1	/* $Id: MakeAlternativeSource.cpp 103005 2024-01-23 23:55:58Z 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-mem.h>
33	#include <iprt/asm.h>
34	#include <iprt/buildconfig.h>
35	#include <iprt/ctype.h>
36	#include <iprt/dbg.h>
37	#include <iprt/err.h>
38	#include <iprt/file.h>
39	#include <iprt/getopt.h>
40	#include <iprt/initterm.h>
41	#include <iprt/list.h>
42	#include <iprt/mem.h>
43	#include <iprt/message.h>
44	#include <iprt/string.h>
45	#include <iprt/stream.h>
46	#include <iprt/x86.h>
47
48	#include <VBox/dis.h>
49
50
51	/*********************************************************************************************************************************
52	* Structures and Typedefs *
53	*********************************************************************************************************************************/
54	/**
55	* A BIOS segment.
56	*/
57	typedef struct BIOSSEG
58	{
59	char szName[32];
60	char szClass[32];
61	char szGroup[32];
62	RTFAR16 Address;
63	uint32_t uFlatAddr;
64	uint32_t cb;
65	/** RVA into g_hSymMod. */
66	uint32_t uRva;
67	} BIOSSEG;
68	/** Pointer to a BIOS segment. */
69	typedef BIOSSEG *PBIOSSEG;
70
71
72	/**
73	* A BIOS object file.
74	*/
75	typedef struct BIOSOBJFILE
76	{
77	RTLISTNODE Node;
78	char *pszSource;
79	char *pszObject;
80	} BIOSOBJFILE;
81	/** A BIOS object file. */
82	typedef BIOSOBJFILE *PBIOSOBJFILE;
83
84
85	/**
86	* Pointer to a BIOS map parser handle.
87	*/
88	typedef struct BIOSMAP
89	{
90	/** The stream pointer. */
91	PRTSTREAM hStrm;
92	/** The file name. */
93	const char *pszMapFile;
94	/** Set when EOF has been reached. */
95	bool fEof;
96	/** The current line number (0 based).*/
97	uint32_t iLine;
98	/** The length of the current line. */
99	uint32_t cch;
100	/** The offset of the first non-white character on the line. */
101	uint32_t offNW;
102	/** The line buffer. */
103	char szLine[16384];
104	} BIOSMAP;
105	/** Pointer to a BIOS map parser handle. */
106	typedef BIOSMAP *PBIOSMAP;
107
108
109	/*********************************************************************************************************************************
110	* Global Variables *
111	*********************************************************************************************************************************/
112	/** The verbosity level.*/
113	static unsigned g_cVerbose = 2 /0/;
114	/** Pointer to the BIOS image. */
115	static uint8_t const *g_pbImg;
116	/** The size of the BIOS image. */
117	static size_t g_cbImg;
118
119	/** Debug module for the map file. */
120	static RTDBGMOD g_hMapMod = NIL_RTDBGMOD;
121	/** The number of BIOS segments found in the map file. */
122	static uint32_t g_cSegs = 0;
123	/** Array of BIOS segments from the map file. */
124	static BIOSSEG g_aSegs[32];
125	/** List of BIOSOBJFILE. */
126	static RTLISTANCHOR g_ObjList;
127
128	/** Debug module with symbols. */
129	static RTDBGMOD g_hSymMod = NIL_RTDBGMOD;
130
131	/** The output stream. */
132	static PRTSTREAM g_hStrmOutput = NULL;
133
134	/** The type of BIOS we're working on. */
135	static enum BIOSTYPE
136	{
137	kBiosType_System = 0,
138	kBiosType_Vga
139	} g_enmBiosType = kBiosType_System;
140	/** The flat ROM base address. */
141	static uint32_t g_uBiosFlatBase = 0xf0000;
142
143
144	static bool outputPrintfV(const char *pszFormat, va_list va)
145	{
146	int rc = RTStrmPrintfV(g_hStrmOutput, pszFormat, va);
147	if (RT_FAILURE(rc))
148	{
149	RTMsgError("Output error: %Rrc\n", rc);
150	return false;
151	}
152	return true;
153	}
154
155
156	static bool outputPrintf(const char *pszFormat, ...)
157	{
158	va_list va;
159	va_start(va, pszFormat);
160	bool fRc = outputPrintfV(pszFormat, va);
161	va_end(va);
162	return fRc;
163	}
164
165
166	/**
167	* Opens the output file for writing.
168	*
169	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
170	* @param pszOutput Path to the output file.
171	*/
172	static RTEXITCODE OpenOutputFile(const char *pszOutput)
173	{
174	if (!pszOutput)
175	g_hStrmOutput = g_pStdOut;
176	else
177	{
178	int rc = RTStrmOpen(pszOutput, "w", &g_hStrmOutput);
179	if (RT_FAILURE(rc))
180	return RTMsgErrorExit(RTEXITCODE_FAILURE, "Failed to open output file '%s': %Rrc", pszOutput, rc);
181	}
182	return RTEXITCODE_SUCCESS;
183	}
184
185
186	/**
187	* Displays a disassembly error and returns @c false.
188	*
189	* @returns @c false.
190	* @param pszFormat The error format string.
191	* @param ... Format argument.
192	*/
193	static bool disError(const char *pszFormat, ...)
194	{
195	va_list va;
196	va_start(va, pszFormat);
197	RTMsgErrorV(pszFormat, va);
198	va_end(va);
199	return false;
200	}
201
202
203	/**
204	* Output the disassembly file header.
205	*
206	* @returns @c true on success,
207	*/
208	static bool disFileHeader(void)
209	{
210	bool fRc;
211	fRc = outputPrintf("; $Id: MakeAlternativeSource.cpp 103005 2024-01-23 23:55:58Z vboxsync $ \n"
212	";; @file\n"
213	"; Auto Generated source file. Do not edit.\n"
214	";\n"
215	);
216	if (!fRc)
217	return fRc;
218
219	/*
220	* List the header of each source file, up to and including the
221	* copyright notice.
222	*/
223	bool fNeedLgplDisclaimer = false;
224	PBIOSOBJFILE pObjFile;
225	RTListForEach(&g_ObjList, pObjFile, BIOSOBJFILE, Node)
226	{
227	PRTSTREAM hStrm;
228	int rc = RTStrmOpen(pObjFile->pszSource, "r", &hStrm);
229	if (RT_SUCCESS(rc))
230	{
231	fRc = outputPrintf("\n"
232	";\n"
233	"; Source file: %Rbn\n"
234	";\n"
235	, pObjFile->pszSource);
236	uint32_t iLine = 0;
237	bool fSeenCopyright = false;
238	char szLine[4096];
239	while ((rc = RTStrmGetLine(hStrm, szLine, sizeof(szLine))) == VINF_SUCCESS)
240	{
241	iLine++;
242
243	/* Check if we're done. */
244	char *psz = RTStrStrip(szLine);
245	if ( fSeenCopyright
246	&& ( (psz[0] == '*' && psz[1] == '/')
247	\|\| psz[0] == '\0') )
248	break;
249
250	/* Strip comment suffix. */
251	size_t cch = strlen(psz);
252	if (cch >= 2 && psz[cch - 1] == '/' && psz[cch - 2] == '*')
253	{
254	psz[cch - 2] = '\0';
255	RTStrStripR(psz);
256	}
257
258	/* Skip line prefix. */
259	if (psz[0] == '/' && psz[1] == '*')
260	psz += 2;
261	else if (psz[0] == '*')
262	psz += 1;
263	else
264	while (*psz == ';')
265	psz++;
266	if (RT_C_IS_SPACE(*psz))
267	psz++;
268
269	/* Skip the doxygen file tag line. */
270	if (!strcmp(psz, "* @file") \|\| !strcmp(psz, "@file"))
271	continue;
272
273	/* Detect copyright section. */
274	if ( !fSeenCopyright
275	&& ( strstr(psz, "Copyright")
276	\|\| strstr(psz, "copyright")) )
277	fSeenCopyright = true;
278
279	/* Detect LGPL. */
280	if (strstr(psz, "LGPL"))
281	fNeedLgplDisclaimer = true;
282
283	fRc = outputPrintf("; %s\n", psz) && fRc;
284	}
285
286	RTStrmClose(hStrm);
287	if (rc != VINF_SUCCESS)
288	return disError("Error reading '%s': rc=%Rrc iLine=%u", pObjFile->pszSource, rc, iLine);
289	}
290	}
291
292	/*
293	* Add Oracle LGPL disclaimer.
294	*/
295	if (fNeedLgplDisclaimer)
296	outputPrintf("\n"
297	";\n"
298	"; Oracle LGPL Disclaimer: For the avoidance of doubt, except that if any license choice\n"
299	"; other than GPL or LGPL is available it will apply instead, Oracle elects to use only\n"
300	"; the Lesser General Public License version 2.1 (LGPLv2) at this time for any software where\n"
301	"; a choice of LGPL license versions is made available with the language indicating\n"
302	"; that LGPLv2 or any later version may be used, or where a choice of which version\n"
303	"; of the LGPL is applied is otherwise unspecified.\n"
304	";\n"
305	"\n");
306
307	/*
308	* Set the org.
309	*/
310	fRc = outputPrintf("\n"
311	"\n"
312	"\n"
313	) && fRc;
314	return fRc;
315	}
316
317
318	/**
319	* Checks if a byte sequence could be a string litteral.
320	*
321	* @returns @c true if it is, @c false if it isn't.
322	* @param uFlatAddr The address of the byte sequence.
323	* @param cb The length of the sequence.
324	*/
325	static bool disIsString(uint32_t uFlatAddr, uint32_t cb)
326	{
327	if (cb < 6)
328	return false;
329
330	uint8_t const *pb = &g_pbImg[uFlatAddr - g_uBiosFlatBase];
331	while (cb > 0)
332	{
333	if ( !RT_C_IS_PRINT(*pb)
334	&& *pb != '\r'
335	&& *pb != '\n'
336	&& *pb != '\t')
337	{
338	if (*pb == '\0')
339	{
340	do
341	{
342	pb++;
343	cb--;
344	} while (cb > 0 && *pb == '\0');
345	return cb == 0;
346	}
347	return false;
348	}
349	pb++;
350	cb--;
351	}
352
353	return true;
354	}
355
356
357	#if 0 /* unused */
358	/**
359	* Checks if a dword could be a far 16:16 BIOS address.
360	*
361	* @returns @c true if it is, @c false if it isn't.
362	* @param uFlatAddr The address of the dword.
363	*/
364	static bool disIsFarBiosAddr(uint32_t uFlatAddr)
365	{
366	uint16_t const pu16 = (uint16_t const )&g_pbImg[uFlatAddr - g_uBiosFlatBase];
367	if (pu16[1] < 0xf000)
368	return false;
369	if (pu16[1] > 0xfff0)
370	return false;
371	uint32_t uFlatAddr2 = (uint32_t)(pu16[1] << 4) \| pu16[0];
372	if (uFlatAddr2 >= g_uBiosFlatBase + g_cbImg)
373	return false;
374	return true;
375	}
376	#endif
377
378
379	static bool disByteData(uint32_t uFlatAddr, uint32_t cb)
380	{
381	uint8_t const *pb = &g_pbImg[uFlatAddr - g_uBiosFlatBase];
382	size_t cbOnLine = 0;
383	while (cb-- > 0)
384	{
385	bool fRc;
386	if (cbOnLine >= 16)
387	{
388	fRc = outputPrintf("\n"
389	" db 0%02xh", *pb);
390	cbOnLine = 1;
391	}
392	else if (!cbOnLine)
393	{
394	fRc = outputPrintf(" db 0%02xh", *pb);
395	cbOnLine = 1;
396	}
397	else
398	{
399	fRc = outputPrintf(", 0%02xh", *pb);
400	cbOnLine++;
401	}
402	if (!fRc)
403	return false;
404	pb++;
405	}
406	return outputPrintf("\n");
407	}
408
409
410	static bool disWordData(uint32_t uFlatAddr, uint32_t cb)
411	{
412	if (cb & 1)
413	return disError("disWordData expects word aligned size: cb=%#x uFlatAddr=%#x", uFlatAddr, cb);
414
415	uint16_t const pu16 = (uint16_t const )&g_pbImg[uFlatAddr - g_uBiosFlatBase];
416	size_t cbOnLine = 0;
417	while (cb > 0)
418	{
419	bool fRc;
420	if (cbOnLine >= 16)
421	{
422	fRc = outputPrintf("\n"
423	" dw 0%04xh", *pu16);
424	cbOnLine = 2;
425	}
426	else if (!cbOnLine)
427	{
428	fRc = outputPrintf(" dw 0%04xh", *pu16);
429	cbOnLine = 2;
430	}
431	else
432	{
433	fRc = outputPrintf(", 0%04xh", *pu16);
434	cbOnLine += 2;
435	}
436	if (!fRc)
437	return false;
438	pu16++;
439	cb -= 2;
440	}
441	return outputPrintf("\n");
442	}
443
444
445	static bool disDWordData(uint32_t uFlatAddr, uint32_t cb)
446	{
447	if (cb & 3)
448	return disError("disWordData expects dword aligned size: cb=%#x uFlatAddr=%#x", uFlatAddr, cb);
449
450	uint32_t const pu32 = (uint32_t const )&g_pbImg[uFlatAddr - g_uBiosFlatBase];
451	size_t cbOnLine = 0;
452	while (cb > 0)
453	{
454	bool fRc;
455	if (cbOnLine >= 16)
456	{
457	fRc = outputPrintf("\n"
458	" dd 0%08xh", *pu32);
459	cbOnLine = 4;
460	}
461	else if (!cbOnLine)
462	{
463	fRc = outputPrintf(" dd 0%08xh", *pu32);
464	cbOnLine = 4;
465	}
466	else
467	{
468	fRc = outputPrintf(", 0%08xh", *pu32);
469	cbOnLine += 4;
470	}
471	if (!fRc)
472	return false;
473	pu32++;
474	cb -= 4;
475	}
476	return outputPrintf("\n");
477	}
478
479
480	static bool disStringData(uint32_t uFlatAddr, uint32_t cb)
481	{
482	uint8_t const *pb = &g_pbImg[uFlatAddr - g_uBiosFlatBase];
483	uint32_t cchOnLine = 0;
484	while (cb > 0)
485	{
486	/* Line endings and beginnings. */
487	if (cchOnLine >= 72)
488	{
489	if (!outputPrintf("\n"))
490	return false;
491	cchOnLine = 0;
492	}
493	if ( !cchOnLine
494	&& !outputPrintf(" db "))
495	return false;
496
497	/* See how many printable character we've got. */
498	uint32_t cchPrintable = 0;
499	while ( cchPrintable < cb
500	&& RT_C_IS_PRINT(pb[cchPrintable])
501	&& pb[cchPrintable] != '\'')
502	cchPrintable++;
503
504	bool fRc = true;
505	if (cchPrintable)
506	{
507	if (cchPrintable + cchOnLine > 72)
508	cchPrintable = 72 - cchOnLine;
509	if (cchOnLine)
510	{
511	fRc = outputPrintf(", '%.*s'", cchPrintable, pb);
512	cchOnLine += 4 + cchPrintable;
513	}
514	else
515	{
516	fRc = outputPrintf("'%.*s'", cchPrintable, pb);
517	cchOnLine += 2 + cchPrintable;
518	}
519	pb += cchPrintable;
520	cb -= cchPrintable;
521	}
522	else
523	{
524	if (cchOnLine)
525	{
526	fRc = outputPrintf(", 0%02xh", *pb);
527	cchOnLine += 6;
528	}
529	else
530	{
531	fRc = outputPrintf("0%02xh", *pb);
532	cchOnLine += 4;
533	}
534	pb++;
535	cb--;
536	}
537	if (!fRc)
538	return false;
539	}
540	return outputPrintf("\n");
541	}
542
543
544	/**
545	* For dumping a portion of a string table.
546	*
547	* @returns @c true on success, @c false on failure.
548	* @param uFlatAddr The start address.
549	* @param cb The size of the string table.
550	*/
551	static bool disStringsData(uint32_t uFlatAddr, uint32_t cb)
552	{
553	uint8_t const *pb = &g_pbImg[uFlatAddr - g_uBiosFlatBase];
554	uint32_t cchOnLine = 0;
555	uint8_t bPrev = 255;
556	while (cb > 0)
557	{
558	/* Line endings and beginnings. */
559	if ( cchOnLine >= 72
560	\|\| (bPrev == '\0' && *pb != '\0'))
561	{
562	if (!outputPrintf("\n"))
563	return false;
564	cchOnLine = 0;
565	}
566	if ( !cchOnLine
567	&& !outputPrintf(" db "))
568	return false;
569
570	/* See how many printable character we've got. */
571	uint32_t cchPrintable = 0;
572	while ( cchPrintable < cb
573	&& RT_C_IS_PRINT(pb[cchPrintable])
574	&& pb[cchPrintable] != '\'')
575	cchPrintable++;
576
577	bool fRc = true;
578	if (cchPrintable)
579	{
580	if (cchPrintable + cchOnLine > 72)
581	cchPrintable = 72 - cchOnLine;
582	if (cchOnLine)
583	{
584	fRc = outputPrintf(", '%.*s'", cchPrintable, pb);
585	cchOnLine += 4 + cchPrintable;
586	}
587	else
588	{
589	fRc = outputPrintf("'%.*s'", cchPrintable, pb);
590	cchOnLine += 2 + cchPrintable;
591	}
592	pb += cchPrintable;
593	cb -= cchPrintable;
594	}
595	else
596	{
597	if (cchOnLine)
598	{
599	fRc = outputPrintf(", 0%02xh", *pb);
600	cchOnLine += 6;
601	}
602	else
603	{
604	fRc = outputPrintf("0%02xh", *pb);
605	cchOnLine += 4;
606	}
607	pb++;
608	cb--;
609	}
610	if (!fRc)
611	return false;
612	bPrev = pb[-1];
613	}
614	return outputPrintf("\n");
615	}
616
617
618	/**
619	* Minds the gap between two segments.
620	*
621	* Gaps should generally be zero filled.
622	*
623	* @returns @c true on success, @c false on failure.
624	* @param uFlatAddr The address of the gap.
625	* @param cbPadding The size of the gap.
626	*/
627	static bool disCopySegmentGap(uint32_t uFlatAddr, uint32_t cbPadding)
628	{
629	if (g_cVerbose > 0)
630	outputPrintf("\n"
631	" ; Padding %#x bytes at %#x\n", cbPadding, uFlatAddr);
632	uint8_t const *pb = &g_pbImg[uFlatAddr - g_uBiosFlatBase];
633	if (ASMMemIsZero(pb, cbPadding))
634	return outputPrintf(" times %u db 0\n", cbPadding);
635
636	return disByteData(uFlatAddr, cbPadding);
637	}
638
639
640	/**
641	* Worker for disGetNextSymbol that only does the looking up, no RTDBSYMBOL::cb
642	* calc.
643	*
644	* @param uFlatAddr The address to start searching at.
645	* @param cbMax The size of the search range.
646	* @param poff Where to return the offset between the symbol
647	* and @a uFlatAddr.
648	* @param pSym Where to return the symbol data.
649	*/
650	static void disGetNextSymbolWorker(uint32_t uFlatAddr, uint32_t cbMax, uint32_t *poff, PRTDBGSYMBOL pSym)
651	{
652	RTINTPTR offMap = RTINTPTR_MAX;
653	RTDBGSYMBOL MapSym;
654	int rcMap = RTDbgModSymbolByAddr(g_hMapMod, RTDBGSEGIDX_RVA, uFlatAddr, RTDBGSYMADDR_FLAGS_GREATER_OR_EQUAL, &offMap, &MapSym);
655
656	RTINTPTR off = RTINTPTR_MAX;
657	int rc = RTDbgModSymbolByAddr(g_hSymMod, RTDBGSEGIDX_RVA, uFlatAddr - g_uBiosFlatBase,
658	RTDBGSYMADDR_FLAGS_GREATER_OR_EQUAL, &off, pSym);
659	if ( RT_SUCCESS(rc)
660	&& RT_ABS(off) <= RT_ABS(offMap))
661	pSym->Value += g_uBiosFlatBase;
662	else
663	{
664	*pSym = MapSym;
665	off = offMap;
666	rc = rcMap;
667	}
668	if (RT_SUCCESS(rc))
669	{
670	/* negative offset, indicates beyond. */
671	if (off <= 0)
672	{
673	*poff = (uint32_t)-off;
674
675	/* Mangle symbols the assembler might confuse with instructions. */
676	size_t cchName = strlen(pSym->szName);
677	if ( cchName <= 4
678	&& ( strcmp("wait", pSym->szName) == 0
679	\|\| strcmp("hlt", pSym->szName) == 0))
680	{
681	memmove(&pSym->szName[1], &pSym->szName[0], cchName);
682	pSym->szName[0] = '_';
683	pSym->szName[cchName + 1] = '_';
684	pSym->szName[cchName + 2] = '\0';
685	}
686	return;
687	}
688
689	outputPrintf(" ; !! RTDbgModSymbolByAddr(,,%#x,,) -> off=%RTptr cb=%RTptr uValue=%RTptr '%s'\n",
690	uFlatAddr, off, pSym->cb, pSym->Value, pSym->szName);
691	}
692	else if (rc != VERR_SYMBOL_NOT_FOUND)
693	outputPrintf(" ; !! RTDbgModSymbolByAddr(,,%#x,,) -> %Rrc\n", uFlatAddr, rc);
694
695	RTStrPrintf(pSym->szName, sizeof(pSym->szName), "_dummy_addr_%#x", uFlatAddr + cbMax);
696	pSym->Value = uFlatAddr + cbMax;
697	pSym->cb = 0;
698	pSym->offSeg = uFlatAddr + cbMax;
699	pSym->iSeg = RTDBGSEGIDX_RVA;
700	pSym->iOrdinal = 0;
701	pSym->fFlags = 0;
702	*poff = cbMax;
703	}
704
705
706	/**
707	* Gets the symbol at or after the given address.
708	*
709	* If there are no symbols in the specified range, @a pSym and @a poff will be
710	* set up to indicate a symbol at the first byte after the range.
711	*
712	* @param uFlatAddr The address to start searching at.
713	* @param cbMax The size of the search range.
714	* @param poff Where to return the offset between the symbol
715	* and @a uFlatAddr.
716	* @param pSym Where to return the symbol data.
717	*/
718	static void disGetNextSymbol(uint32_t uFlatAddr, uint32_t cbMax, uint32_t *poff, PRTDBGSYMBOL pSym)
719	{
720	disGetNextSymbolWorker(uFlatAddr, cbMax, poff, pSym);
721	if ( *poff < cbMax
722	&& pSym->cb == 0)
723	{
724	if (*poff + 1 < cbMax)
725	{
726	uint32_t off2;
727	RTDBGSYMBOL Sym2;
728	disGetNextSymbolWorker(uFlatAddr + poff + 1, cbMax - poff - 1, &off2, &Sym2);
729	pSym->cb = off2 + 1;
730	}
731	else
732	pSym->cb = 1;
733	}
734	if (pSym->cb > cbMax - *poff)
735	pSym->cb = cbMax - *poff;
736
737	if (g_cVerbose > 1)
738	outputPrintf(" ; disGetNextSymbol %#x LB %#x -> off=%#x cb=%RTptr uValue=%RTptr '%s'\n",
739	uFlatAddr, cbMax, *poff, pSym->cb, pSym->Value, pSym->szName);
740
741	}
742
743
744	/**
745	* For dealing with the const segment (string constants).
746	*
747	* @returns @c true on success, @c false on failure.
748	* @param iSeg The segment.
749	*/
750	static bool disConstSegment(uint32_t iSeg)
751	{
752	uint32_t uFlatAddr = g_aSegs[iSeg].uFlatAddr;
753	uint32_t cb = g_aSegs[iSeg].cb;
754
755	while (cb > 0)
756	{
757	uint32_t off;
758	RTDBGSYMBOL Sym;
759	disGetNextSymbol(uFlatAddr, cb, &off, &Sym);
760
761	if (off > 0)
762	{
763	if (!disStringsData(uFlatAddr, off))
764	return false;
765	cb -= off;
766	uFlatAddr += off;
767	off = 0;
768	if (!cb)
769	break;
770	}
771
772	bool fRc;
773	if (off == 0)
774	{
775	size_t cchName = strlen(Sym.szName);
776	fRc = outputPrintf("%s: %*s; %#x LB %#x\n", Sym.szName, cchName < 41 - 2 ? cchName - 41 - 2 : 0, "", uFlatAddr, Sym.cb);
777	if (!fRc)
778	return false;
779	fRc = disStringsData(uFlatAddr, Sym.cb);
780	uFlatAddr += Sym.cb;
781	cb -= Sym.cb;
782	}
783	else
784	{
785	fRc = disStringsData(uFlatAddr, Sym.cb);
786	uFlatAddr += cb;
787	cb = 0;
788	}
789	if (!fRc)
790	return false;
791	}
792
793	return true;
794	}
795
796
797
798	static bool disDataSegment(uint32_t iSeg)
799	{
800	uint32_t uFlatAddr = g_aSegs[iSeg].uFlatAddr;
801	uint32_t cb = g_aSegs[iSeg].cb;
802
803	while (cb > 0)
804	{
805	uint32_t off;
806	RTDBGSYMBOL Sym;
807	disGetNextSymbol(uFlatAddr, cb, &off, &Sym);
808
809	if (off > 0)
810	{
811	if (!disByteData(uFlatAddr, off))
812	return false;
813	cb -= off;
814	uFlatAddr += off;
815	off = 0;
816	if (!cb)
817	break;
818	}
819
820	bool fRc;
821	if (off == 0)
822	{
823	size_t cchName = strlen(Sym.szName);
824	fRc = outputPrintf("%s: %*s; %#x LB %#x\n", Sym.szName, cchName < 41 - 2 ? cchName - 41 - 2 : 0, "", uFlatAddr, Sym.cb);
825	if (!fRc)
826	return false;
827
828	if (Sym.cb == 2)
829	fRc = disWordData(uFlatAddr, 2);
830	//else if (Sym.cb == 4 && disIsFarBiosAddr(uFlatAddr))
831	// fRc = disDWordData(uFlatAddr, 4);
832	else if (Sym.cb == 4)
833	fRc = disDWordData(uFlatAddr, 4);
834	else if (disIsString(uFlatAddr, Sym.cb))
835	fRc = disStringData(uFlatAddr, Sym.cb);
836	else
837	fRc = disByteData(uFlatAddr, Sym.cb);
838
839	uFlatAddr += Sym.cb;
840	cb -= Sym.cb;
841	}
842	else
843	{
844	fRc = disByteData(uFlatAddr, cb);
845	uFlatAddr += cb;
846	cb = 0;
847	}
848	if (!fRc)
849	return false;
850	}
851
852	return true;
853	}
854
855
856	static bool disIsCodeAndAdjustSize(uint32_t uFlatAddr, PRTDBGSYMBOL pSym, PBIOSSEG pSeg)
857	{
858	RT_NOREF_PV(uFlatAddr);
859
860	switch (g_enmBiosType)
861	{
862	/*
863	* This is for the PC BIOS.
864	*/
865	case kBiosType_System:
866	if (!strcmp(pSeg->szName, "BIOSSEG"))
867	{
868	if ( !strcmp(pSym->szName, "rom_fdpt")
869	\|\| !strcmp(pSym->szName, "pmbios_gdt")
870	\|\| !strcmp(pSym->szName, "pmbios_gdt_desc")
871	\|\| !strcmp(pSym->szName, "_pmode_IDT")
872	\|\| !strcmp(pSym->szName, "_rmode_IDT")
873	\|\| !strncmp(pSym->szName, RT_STR_TUPLE("font"))
874	\|\| !strcmp(pSym->szName, "bios_string")
875	\|\| !strcmp(pSym->szName, "vector_table")
876	\|\| !strcmp(pSym->szName, "pci_routing_table_structure")
877	\|\| !strcmp(pSym->szName, "_pci_routing_table")
878	)
879	return false;
880	}
881
882	if (!strcmp(pSym->szName, "cpu_reset"))
883	pSym->cb = RT_MIN(pSym->cb, 5);
884	else if (!strcmp(pSym->szName, "pci_init_end"))
885	pSym->cb = RT_MIN(pSym->cb, 3);
886	break;
887
888	/*
889	* This is for the VGA BIOS.
890	*/
891	case kBiosType_Vga:
892	break;
893	}
894
895	return true;
896	}
897
898
899	static bool disIs16BitCode(const char *pszSymbol)
900	{
901	RT_NOREF_PV(pszSymbol);
902	return true;
903	}
904
905
906	static bool disIsMemoryParameter(PCDISOPPARAM pParam, uint16_t fParam)
907	{
908	return fParam != OP_PARM_NONE
909	&& DISUSE_IS_EFFECTIVE_ADDR(pParam->fUse);
910	}
911
912
913	static bool disAccessesMemory(PCDISSTATE pDis)
914	{
915	PCDISOPCODE pCurInstr = pDis->pCurInstr;
916	return disIsMemoryParameter(&pDis->Param1, pCurInstr->fParam1)
917	\|\| disIsMemoryParameter(&pDis->Param2, pCurInstr->fParam2)
918	\|\| disIsMemoryParameter(&pDis->Param3, pCurInstr->fParam3)
919	\|\| disIsMemoryParameter(&pDis->Param4, pCurInstr->fParam4);
920	}
921
922
923	/**
924	* Deals with instructions that YASM will assemble differently than WASM/WCC.
925	*/
926	static size_t disHandleYasmDifferences(PDISSTATE pDis, uint32_t uFlatAddr, uint32_t cbInstr,
927	char *pszBuf, size_t cbBuf, size_t cchUsed)
928	{
929	bool fDifferent = DISFormatYasmIsOddEncoding(pDis);
930	uint8_t const *pb = &g_pbImg[uFlatAddr - g_uBiosFlatBase];
931
932	/*
933	* Disassembler bugs.
934	*/
935	/** @todo Group 1a and 11 seems to be disassembled incorrectly when
936	* modrm.reg != 0. Those encodings should be invalid AFAICT. */
937
938	if ( ( pDis->x86.bOpCode == 0x8f /* group 1a */
939	\|\| pDis->x86.bOpCode == 0xc7 /* group 11 */
940	\|\| pDis->x86.bOpCode == 0xc6 /* group 11 - not verified */
941	)
942	&& pDis->x86.ModRM.Bits.Reg != 0)
943	fDifferent = true;
944	/*
945	* Check these out and consider adding them to DISFormatYasmIsOddEncoding.
946	*/
947	else if ( pb[0] == 0xf3
948	&& pb[1] == 0x66
949	&& pb[2] == 0x6d)
950	fDifferent = true; /* rep insd - prefix switched. */
951	else if ( pb[0] == 0xc6
952	&& pb[1] == 0xc5
953	&& pb[2] == 0xba)
954	fDifferent = true; /* mov ch, 0bah - yasm uses a short sequence: 0xb5 0xba. */
955
956	/*
957	* 32-bit retf.
958	*/
959	else if ( pb[0] == 0x66
960	&& pb[1] == 0xcb)
961	fDifferent = true;
962
963	/*
964	* Handle different stuff.
965	*/
966	if (fDifferent)
967	{
968	disByteData(uFlatAddr, cbInstr); /* lazy bird. */
969
970	if (cchUsed + 2 < cbBuf)
971	{
972	memmove(pszBuf + 2, pszBuf, cchUsed + 1); /* include terminating \0 */
973	cchUsed += 2;
974	}
975
976	pszBuf[0] = ';';
977	pszBuf[1] = ' ';
978	}
979
980	return cchUsed;
981	}
982
983
984	/**
985	* @callback_method_impl{FNDISREADBYTES}
986	*
987	* @remarks @a uSrcAddr is the flat address.
988	*/
989	static DECLCALLBACK(int) disReadOpcodeBytes(PDISSTATE pDis, uint8_t offInstr, uint8_t cbMinRead, uint8_t cbMaxRead)
990	{
991	RT_NOREF_PV(cbMinRead);
992
993	RTUINTPTR offBios = pDis->uInstrAddr + offInstr - g_uBiosFlatBase;
994	size_t cbToRead = cbMaxRead;
995	if (offBios + cbToRead > g_cbImg)
996	{
997	if (offBios >= g_cbImg)
998	cbToRead = 0;
999	else
1000	cbToRead = g_cbImg - offBios;
1001	}
1002	memcpy(&pDis->Instr.ab[offInstr], &g_pbImg[offBios], cbToRead);
1003	pDis->cbCachedInstr = (uint8_t)(offInstr + cbToRead);
1004	return VINF_SUCCESS;
1005	}
1006
1007
1008	/**
1009	* Disassembles code.
1010	*
1011	* @returns @c true on success, @c false on failure.
1012	* @param uFlatAddr The address where the code starts.
1013	* @param cb The amount of code to disassemble.
1014	* @param fIs16Bit Is is 16-bit (@c true) or 32-bit (@c false).
1015	*/
1016	static bool disCode(uint32_t uFlatAddr, uint32_t cb, bool fIs16Bit)
1017	{
1018	uint8_t const *pb = &g_pbImg[uFlatAddr - g_uBiosFlatBase];
1019
1020	while (cb > 0)
1021	{
1022	/* Trailing zero padding detection. */
1023	if ( *pb == '\0'
1024	&& ASMMemIsZero(pb, RT_MIN(cb, 8)))
1025	{
1026	void *pv = ASMMemFirstNonZero(pb, cb);
1027	uint32_t cbZeros = pv ? (uint32_t)((uint8_t const *)pv - pb) : cb;
1028	if (!outputPrintf(" times %#x db 0\n", cbZeros))
1029	return false;
1030	cb -= cbZeros;
1031	pb += cbZeros;
1032	uFlatAddr += cbZeros;
1033	if ( cb == 2
1034	&& pb[0] == 'X'
1035	&& pb[1] == 'M')
1036	return disStringData(uFlatAddr, cb);
1037	}
1038	/* Work arounds for switch tables and such (disas assertions). */
1039	else if ( 0
1040	\|\| ( pb[0] == 0x50 /* int13_cdemu switch */
1041	&& pb[1] == 0x4e
1042	&& pb[2] == 0x49
1043	&& pb[3] == 0x48
1044	&& pb[4] == 0x47
1045	)
1046	\|\| ( pb[0] == 0x8b /* _int13_harddisk_ext switch */
1047	&& pb[1] == 0x46
1048	&& pb[2] == 0x16
1049	&& pb[3] == 0x30
1050	&& pb[4] == 0xe8
1051	&& pb[5] == 0x80
1052	)
1053	\|\| ( pb[0] == 0xd8
1054	&& pb[1] == 0x5f
1055	&& pb[2] == 0x0b
1056	&& pb[3] == 0x60
1057	&& pb[4] == 0x0b
1058	&& pb[5] == 0x60
1059	)
1060	\|\| ( pb[0] == 0x67 /* _pci16_function switch */
1061	&& pb[1] == 0x92
1062	&& pb[2] == 0x81
1063	&& pb[3] == 0x92
1064	&& pb[4] == 0x94
1065	&& pb[5] == 0x92
1066	)
1067	\|\| ( pb[0] == 0xa3 /* _int1a_function switch */
1068	&& pb[1] == 0x67
1069	&& pb[2] == 0xca
1070	&& pb[3] == 0x67
1071	&& pb[4] == 0xef
1072	&& pb[5] == 0x67
1073	)
1074	\|\| ( pb[0] == 0x0b /* _ahci_init byte table */
1075	&& pb[1] == 0x05
1076	&& pb[2] == 0x04
1077	&& pb[3] == 0x03
1078	&& pb[4] == 0x02
1079	&& pb[5] == 0x01
1080	)
1081	\|\| ( pb[0] == 0x00 /* bytes after apm_out_str_ */
1082	&& pb[1] == 0x00
1083	&& pb[2] == 0x00
1084	&& pb[3] == 0x00
1085	&& pb[4] == 0x00
1086	&& pb[5] == 0x00
1087	&& pb[6] == 0xe0
1088	&& pb[7] == 0xa0
1089	&& pb[8] == 0xe2
1090	&& pb[9] == 0xa0
1091	)
1092	\|\| ( pb[0] == 0xf0 /* switch for apm_worker */
1093	&& pb[1] == 0xa0
1094	&& pb[2] == 0xf2
1095	&& pb[3] == 0xa0
1096	&& pb[4] == 0xf6
1097	&& pb[5] == 0xa0
1098	)
1099	\|\| ( pb[0] == 0xd4
1100	&& pb[1] == 0xc6
1101	&& pb[2] == 0xc5
1102	&& pb[3] == 0xba
1103	&& pb[4] == 0xb8
1104	&& pb[5] == 0xb6
1105	)
1106	\|\| ( pb[0] == 0xec /* _int15_function switch */
1107	&& pb[1] == 0xe9
1108	&& pb[2] == 0xd8
1109	&& pb[3] == 0xc1
1110	&& pb[4] == 0xc0
1111	&& pb[5] == 0xbf
1112	)
1113	\|\| ( pb[0] == 0x21 /* _int15_function32 switch */
1114	&& pb[1] == 0x66
1115	&& pb[2] == 0x43
1116	&& pb[3] == 0x66
1117	&& pb[4] == 0x66
1118	&& pb[5] == 0x66
1119	)
1120	\|\| ( pb[0] == 0xf0 /* int15_function_mouse switch */
1121	&& pb[1] == 0x75
1122	&& pb[2] == 0x66
1123	&& pb[3] == 0x76
1124	&& pb[4] == 0xe9
1125	&& pb[5] == 0x76
1126	)
1127	\|\| ( pb[0] == 0x60
1128	&& pb[1] == 0xa0
1129	&& pb[2] == 0x62
1130	&& pb[3] == 0xa0
1131	&& pb[4] == 0x66
1132	&& pb[5] == 0xa0
1133	)
1134	\|\| 0
1135	)
1136	return disByteData(uFlatAddr, cb);
1137	else
1138	{
1139	unsigned cbInstr;
1140	DISSTATE Dis;
1141	Dis.x86.ModRM.Bits.Mod = 3;
1142	int rc = DISInstrWithReader(uFlatAddr, fIs16Bit ? DISCPUMODE_16BIT : DISCPUMODE_32BIT,
1143	disReadOpcodeBytes, NULL, &Dis, &cbInstr);
1144	if ( RT_SUCCESS(rc)
1145	&& cbInstr <= cb
1146	&& Dis.pCurInstr
1147	&& Dis.pCurInstr->uOpcode != OP_INVALID
1148	&& Dis.pCurInstr->uOpcode != OP_ILLUD2
1149	&& ( !(Dis.x86.fPrefix & DISPREFIX_ADDRSIZE)
1150	\|\| disAccessesMemory(&Dis)))
1151	{
1152	char szTmp[4096];
1153	size_t cch = DISFormatYasmEx(&Dis, szTmp, sizeof(szTmp),
1154	DIS_FMT_FLAGS_STRICT
1155	\| DIS_FMT_FLAGS_BYTES_RIGHT \| DIS_FMT_FLAGS_BYTES_COMMENT \| DIS_FMT_FLAGS_BYTES_SPACED,
1156	NULL, NULL);
1157	cch = disHandleYasmDifferences(&Dis, uFlatAddr, cbInstr, szTmp, sizeof(szTmp), cch);
1158	Assert(cch < sizeof(szTmp));
1159
1160	if (g_cVerbose > 1)
1161	{
1162	while (cch < 72)
1163	szTmp[cch++] = ' ';
1164
1165	RTDBGLINE LineInfo = {0};
1166	RTINTPTR offLine = -1;
1167	int rcLine = RTDbgModLineByAddr(g_hSymMod, RTDBGSEGIDX_RVA, uFlatAddr - g_uBiosFlatBase, &offLine, &LineInfo);
1168	if (RT_SUCCESS(rcLine) && offLine == 0 && cch < sizeof(szTmp) - 16)
1169	RTStrPrintf(&szTmp[cch], sizeof(szTmp) - cch, "; %#x %Rbn:%u",
1170	uFlatAddr, LineInfo.szFilename, LineInfo.uLineNo);
1171	else
1172	RTStrPrintf(&szTmp[cch], sizeof(szTmp) - cch, "; %#x", uFlatAddr);
1173	}
1174
1175	if (!outputPrintf(" %s\n", szTmp))
1176	return false;
1177	cb -= cbInstr;
1178	pb += cbInstr;
1179	uFlatAddr += cbInstr;
1180	}
1181	else
1182	{
1183	if (!disByteData(uFlatAddr, 1))
1184	return false;
1185	cb--;
1186	pb++;
1187	uFlatAddr++;
1188	}
1189	}
1190	}
1191	return true;
1192	}
1193
1194
1195	static bool disCodeSegment(uint32_t iSeg)
1196	{
1197	uint32_t uFlatAddr = g_aSegs[iSeg].uFlatAddr;
1198	uint32_t cb = g_aSegs[iSeg].cb;
1199
1200	while (cb > 0)
1201	{
1202	uint32_t off;
1203	RTDBGSYMBOL Sym;
1204	disGetNextSymbol(uFlatAddr, cb, &off, &Sym);
1205
1206	if (off > 0)
1207	{
1208	if (!disByteData(uFlatAddr, off))
1209	return false;
1210	cb -= off;
1211	uFlatAddr += off;
1212	off = 0;
1213	if (!cb)
1214	break;
1215	}
1216
1217	bool fRc;
1218	if (off == 0)
1219	{
1220	size_t cchName = strlen(Sym.szName);
1221	fRc = outputPrintf("%s: %*s; %#x LB %#x\n", Sym.szName, cchName < 41 - 2 ? cchName - 41 - 2 : 0, "", uFlatAddr, Sym.cb);
1222	if (!fRc)
1223	return false;
1224
1225	if (disIsCodeAndAdjustSize(uFlatAddr, &Sym, &g_aSegs[iSeg]))
1226	fRc = disCode(uFlatAddr, Sym.cb, disIs16BitCode(Sym.szName));
1227	else
1228	fRc = disByteData(uFlatAddr, Sym.cb);
1229
1230	uFlatAddr += Sym.cb;
1231	cb -= Sym.cb;
1232	}
1233	else
1234	{
1235	fRc = disByteData(uFlatAddr, cb);
1236	uFlatAddr += cb;
1237	cb = 0;
1238	}
1239	if (!fRc)
1240	return false;
1241	}
1242
1243	return true;
1244	}
1245
1246
1247	static RTEXITCODE DisassembleBiosImage(void)
1248	{
1249	if (!disFileHeader())
1250	return RTEXITCODE_FAILURE;
1251
1252	/*
1253	* Work the image segment by segment.
1254	*/
1255	bool fRc = true;
1256	uint32_t uFlatAddr = g_uBiosFlatBase;
1257	for (uint32_t iSeg = 0; iSeg < g_cSegs && fRc; iSeg++)
1258	{
1259	/* Is there a gap between the segments? */
1260	if (uFlatAddr < g_aSegs[iSeg].uFlatAddr)
1261	{
1262	fRc = disCopySegmentGap(uFlatAddr, g_aSegs[iSeg].uFlatAddr - uFlatAddr);
1263	if (!fRc)
1264	break;
1265	uFlatAddr = g_aSegs[iSeg].uFlatAddr;
1266	}
1267	else if (uFlatAddr > g_aSegs[iSeg].uFlatAddr)
1268	return RTMsgErrorExit(RTEXITCODE_FAILURE, "Overlapping segments: %u and %u; uFlatAddr=%#x\n", iSeg - 1, iSeg, uFlatAddr);
1269
1270	/* Disassemble the segment. */
1271	fRc = outputPrintf("\n"
1272	"section %s progbits vstart=%#x align=1 ; size=%#x class=%s group=%s\n",
1273	g_aSegs[iSeg].szName, g_aSegs[iSeg].uFlatAddr - g_uBiosFlatBase,
1274	g_aSegs[iSeg].cb, g_aSegs[iSeg].szClass, g_aSegs[iSeg].szGroup);
1275	if (!fRc)
1276	return RTEXITCODE_FAILURE;
1277	if (!strcmp(g_aSegs[iSeg].szName, "CONST"))
1278	fRc = disConstSegment(iSeg);
1279	else if (!strcmp(g_aSegs[iSeg].szClass, "DATA"))
1280	fRc = disDataSegment(iSeg);
1281	else
1282	fRc = disCodeSegment(iSeg);
1283
1284	/* Advance. */
1285	uFlatAddr += g_aSegs[iSeg].cb;
1286	}
1287
1288	/* Final gap. */
1289	if (uFlatAddr < g_uBiosFlatBase + g_cbImg)
1290	fRc = disCopySegmentGap(uFlatAddr, (uint32_t)(g_uBiosFlatBase + g_cbImg - uFlatAddr));
1291	else if (uFlatAddr > g_uBiosFlatBase + g_cbImg)
1292	return RTMsgErrorExit(RTEXITCODE_FAILURE, "Last segment spills beyond 1MB; uFlatAddr=%#x\n", uFlatAddr);
1293
1294	if (!fRc)
1295	return RTEXITCODE_FAILURE;
1296	return RTEXITCODE_SUCCESS;
1297	}
1298
1299
1300
1301	/**
1302	* Parses the symbol file for the BIOS.
1303	*
1304	* This is in ELF/DWARF format.
1305	*
1306	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
1307	* @param pszBiosSym Path to the sym file.
1308	*/
1309	static RTEXITCODE ParseSymFile(const char *pszBiosSym)
1310	{
1311	int rc = RTDbgModCreateFromImage(&g_hSymMod, pszBiosSym, "VBoxBios", RTLDRARCH_WHATEVER, NIL_RTDBGCFG);
1312	if (RT_FAILURE(rc))
1313	return RTMsgErrorExit(RTEXITCODE_FAILURE, "Error opening '%s': %Rrc", pszBiosSym, rc);
1314
1315	if (g_cVerbose > 0)
1316	{
1317	/* Show segments */
1318	RTDBGSEGIDX cSegs = RTDbgModSegmentCount(g_hSymMod);
1319	for (RTDBGSEGIDX iSeg = 0; iSeg < cSegs; iSeg++)
1320	{
1321	RTDBGSEGMENT SegInfo;
1322	rc = RTDbgModSegmentByIndex(g_hSymMod, iSeg, &SegInfo);
1323	if (RT_SUCCESS(rc))
1324	RTMsgInfo("Seg#%u: %05RX64 LB %04RX64 rva %04RX64 %s\n", iSeg, SegInfo.Address, SegInfo.cb, SegInfo.uRva, SegInfo.szName);
1325	else
1326	RTMsgInfo("Seg#%u: RTDbgModSegmentByIndex -> %Rrc\n", iSeg, rc);
1327
1328	}
1329	}
1330	return RTEXITCODE_SUCCESS;
1331	}
1332
1333
1334	/**
1335	* Display an error with the mapfile name and current line, return false.
1336	*
1337	* @returns @c false.
1338	* @param pMap The map file handle.
1339	* @param pszFormat The format string.
1340	* @param ... Format arguments.
1341	*/
1342	static bool mapError(PBIOSMAP pMap, const char *pszFormat, ...)
1343	{
1344	va_list va;
1345	va_start(va, pszFormat);
1346	RTMsgError("%s:%d: %N", pMap->pszMapFile, pMap->iLine, pszFormat, &va);
1347	va_end(va);
1348	return false;
1349	}
1350
1351
1352	/**
1353	* Reads a line from the file.
1354	*
1355	* @returns @c true on success, @c false + msg on failure, @c false on eof.
1356	* @param pMap The map file handle.
1357	*/
1358	static bool mapReadLine(PBIOSMAP pMap)
1359	{
1360	int rc = RTStrmGetLine(pMap->hStrm, pMap->szLine, sizeof(pMap->szLine));
1361	if (RT_FAILURE(rc))
1362	{
1363	if (rc == VERR_EOF)
1364	{
1365	pMap->fEof = true;
1366	pMap->cch = 0;
1367	pMap->offNW = 0;
1368	pMap->szLine[0] = '\0';
1369	}
1370	else
1371	RTMsgError("%s:%d: Read error %Rrc", pMap->pszMapFile, pMap->iLine + 1, rc);
1372	return false;
1373	}
1374	pMap->iLine++;
1375	pMap->cch = (uint32_t)strlen(pMap->szLine);
1376
1377	/* Check out leading white space. */
1378	if (!RT_C_IS_SPACE(pMap->szLine[0]))
1379	pMap->offNW = 0;
1380	else
1381	{
1382	uint32_t off = 1;
1383	while (RT_C_IS_SPACE(pMap->szLine[off]))
1384	off++;
1385	pMap->offNW = off;
1386	}
1387
1388	return true;
1389	}
1390
1391
1392	/**
1393	* Checks if it is an empty line.
1394	* @returns @c true if empty, @c false if not.
1395	* @param pMap The map file handle.
1396	*/
1397	static bool mapIsEmptyLine(PBIOSMAP pMap)
1398	{
1399	Assert(pMap->offNW <= pMap->cch);
1400	return pMap->offNW == pMap->cch;
1401	}
1402
1403
1404	/**
1405	* Reads ahead in the map file until a non-empty line or EOF is encountered.
1406	*
1407	* @returns @c true on success, @c false + msg on failure, @c false on eof.
1408	* @param pMap The map file handle.
1409	*/
1410	static bool mapSkipEmptyLines(PBIOSMAP pMap)
1411	{
1412	for (;;)
1413	{
1414	if (!mapReadLine(pMap))
1415	return false;
1416	if (pMap->offNW < pMap->cch)
1417	return true;
1418	}
1419	}
1420
1421
1422	/**
1423	* Reads ahead in the map file until an empty line or EOF is encountered.
1424	*
1425	* @returns @c true on success, @c false + msg on failure, @c false on eof.
1426	* @param pMap The map file handle.
1427	*/
1428	static bool mapSkipNonEmptyLines(PBIOSMAP pMap)
1429	{
1430	for (;;)
1431	{
1432	if (!mapReadLine(pMap))
1433	return false;
1434	if (pMap->offNW == pMap->cch)
1435	return true;
1436	}
1437	}
1438
1439
1440	/**
1441	* Strips the current line.
1442	*
1443	* The string length may change.
1444	*
1445	* @returns Pointer to the first non-space character.
1446	* @param pMap The map file handle.
1447	* @param pcch Where to return the length of the unstripped
1448	* part. Optional.
1449	*/
1450	static char mapStripCurrentLine(PBIOSMAP pMap, size_t pcch)
1451	{
1452	char *psz = &pMap->szLine[pMap->offNW];
1453	char *pszEnd = &pMap->szLine[pMap->cch];
1454	while ( (uintptr_t)pszEnd > (uintptr_t)psz
1455	&& RT_C_IS_SPACE(pszEnd[-1]))
1456	{
1457	*--pszEnd = '\0';
1458	pMap->cch--;
1459	}
1460	if (pcch)
1461	*pcch = pszEnd - psz;
1462	return psz;
1463	}
1464
1465
1466	/**
1467	* Reads a line from the file and right strips it.
1468	*
1469	* @returns Pointer to szLine on success, @c NULL + msg on failure, @c NULL on
1470	* EOF.
1471	* @param pMap The map file handle.
1472	* @param pcch Where to return the length of the unstripped
1473	* part. Optional.
1474	*/
1475	static char mapReadLineStripRight(PBIOSMAP pMap, size_t pcch)
1476	{
1477	if (!mapReadLine(pMap))
1478	return NULL;
1479	mapStripCurrentLine(pMap, NULL);
1480	if (pcch)
1481	*pcch = pMap->cch;
1482	return pMap->szLine;
1483	}
1484
1485
1486	/**
1487	* mapReadLine() + mapStripCurrentLine().
1488	*
1489	* @returns Pointer to the first non-space character in the new line. NULL on
1490	* read error (bitched already) or end of file.
1491	* @param pMap The map file handle.
1492	* @param pcch Where to return the length of the unstripped
1493	* part. Optional.
1494	*/
1495	static char mapReadLineStrip(PBIOSMAP pMap, size_t pcch)
1496	{
1497	if (!mapReadLine(pMap))
1498	return NULL;
1499	return mapStripCurrentLine(pMap, pcch);
1500	}
1501
1502
1503	/**
1504	* Parses a word, copying it into the supplied buffer, and skipping any spaces
1505	* following it.
1506	*
1507	* @returns @c true on success, @c false on failure.
1508	* @param ppszCursor Pointer to the cursor variable.
1509	* @param pszBuf The output buffer.
1510	* @param cbBuf The size of the output buffer.
1511	*/
1512	static bool mapParseWord(char *ppszCursor, char pszBuf, size_t cbBuf)
1513	{
1514	/* Check that we start on a non-blank. */
1515	char pszStart = ppszCursor;
1516	if (!pszStart \|\| RT_C_IS_SPACE(pszStart))
1517	return false;
1518
1519	/* Find the end of the word. */
1520	char *psz = pszStart + 1;
1521	while (psz && !RT_C_IS_SPACE(psz))
1522	psz++;
1523
1524	/* Copy it. */
1525	size_t cchWord = (uintptr_t)psz - (uintptr_t)pszStart;
1526	if (cchWord >= cbBuf)
1527	return false;
1528	memcpy(pszBuf, pszStart, cchWord);
1529	pszBuf[cchWord] = '\0';
1530
1531	/* Skip blanks following it. */
1532	while (RT_C_IS_SPACE(*psz))
1533	psz++;
1534	*ppszCursor = psz;
1535	return true;
1536	}
1537
1538
1539	/**
1540	* Parses an 16:16 address.
1541	*
1542	* @returns @c true on success, @c false on failure.
1543	* @param ppszCursor Pointer to the cursor variable.
1544	* @param pAddr Where to return the address.
1545	*/
1546	static bool mapParseAddress(char **ppszCursor, PRTFAR16 pAddr)
1547	{
1548	char szWord[32];
1549	if (!mapParseWord(ppszCursor, szWord, sizeof(szWord)))
1550	return false;
1551	size_t cchWord = strlen(szWord);
1552
1553	/* An address is at least 16:16 format. It may be 16:32. It may also be flagged. */
1554	size_t cchAddr = 4 + 1 + 4;
1555	if (cchWord < cchAddr)
1556	return false;
1557	if ( !RT_C_IS_XDIGIT(szWord[0])
1558	\|\| !RT_C_IS_XDIGIT(szWord[1])
1559	\|\| !RT_C_IS_XDIGIT(szWord[2])
1560	\|\| !RT_C_IS_XDIGIT(szWord[3])
1561	\|\| szWord[4] != ':'
1562	\|\| !RT_C_IS_XDIGIT(szWord[5])
1563	\|\| !RT_C_IS_XDIGIT(szWord[6])
1564	\|\| !RT_C_IS_XDIGIT(szWord[7])
1565	\|\| !RT_C_IS_XDIGIT(szWord[8])
1566	)
1567	return false;
1568	if ( cchWord > cchAddr
1569	&& RT_C_IS_XDIGIT(szWord[9])
1570	&& RT_C_IS_XDIGIT(szWord[10])
1571	&& RT_C_IS_XDIGIT(szWord[11])
1572	&& RT_C_IS_XDIGIT(szWord[12]))
1573	cchAddr += 4;
1574
1575	/* Drop flag if present. */
1576	if (cchWord > cchAddr)
1577	{
1578	if (RT_C_IS_XDIGIT(szWord[cchAddr]))
1579	return false;
1580	szWord[cchAddr] = '\0';
1581	cchWord = cchAddr;
1582	}
1583
1584	/* Convert it. */
1585	szWord[4] = '\0';
1586	int rc1 = RTStrToUInt16Full(szWord, 16, &pAddr->sel);
1587	if (rc1 != VINF_SUCCESS)
1588	return false;
1589
1590	int rc2 = RTStrToUInt16Full(szWord + 5, 16, &pAddr->off);
1591	if (rc2 != VINF_SUCCESS)
1592	return false;
1593	return true;
1594	}
1595
1596
1597	/**
1598	* Parses a size.
1599	*
1600	* @returns @c true on success, @c false on failure.
1601	* @param ppszCursor Pointer to the cursor variable.
1602	* @param pcb Where to return the size.
1603	*/
1604	static bool mapParseSize(char *ppszCursor, uint32_t pcb)
1605	{
1606	char szWord[32];
1607	if (!mapParseWord(ppszCursor, szWord, sizeof(szWord)))
1608	return false;
1609	size_t cchWord = strlen(szWord);
1610	if (cchWord != 8)
1611	return false;
1612
1613	int rc = RTStrToUInt32Full(szWord, 16, pcb);
1614	if (rc != VINF_SUCCESS)
1615	return false;
1616	return true;
1617	}
1618
1619
1620	/**
1621	* Parses a section box and the following column header.
1622	*
1623	* @returns @c true on success, @c false + msg on failure, @c false on eof.
1624	* @param pMap Map file handle.
1625	* @param pszSectionNm The expected section name.
1626	* @param cColumns The number of columns.
1627	* @param ... The column names.
1628	*/
1629	static bool mapSkipThruColumnHeadings(PBIOSMAP pMap, const char *pszSectionNm, uint32_t cColumns, ...)
1630	{
1631	if ( mapIsEmptyLine(pMap)
1632	&& !mapSkipEmptyLines(pMap))
1633	return false;
1634
1635	/* +------------+ */
1636	size_t cch;
1637	char *psz = mapStripCurrentLine(pMap, &cch);
1638	if (!psz)
1639	return false;
1640
1641	if ( psz[0] != '+'
1642	\|\| psz[1] != '-'
1643	\|\| psz[2] != '-'
1644	\|\| psz[3] != '-'
1645	\|\| psz[cch - 4] != '-'
1646	\|\| psz[cch - 3] != '-'
1647	\|\| psz[cch - 2] != '-'
1648	\|\| psz[cch - 1] != '+'
1649	)
1650	{
1651	RTMsgError("%s:%d: Expected section box: +-----...", pMap->pszMapFile, pMap->iLine);
1652	return false;
1653	}
1654
1655	/* \| pszSectionNm \| */
1656	psz = mapReadLineStrip(pMap, &cch);
1657	if (!psz)
1658	return false;
1659
1660	size_t cchSectionNm = strlen(pszSectionNm);
1661	if ( psz[0] != '\|'
1662	\|\| psz[1] != ' '
1663	\|\| psz[2] != ' '
1664	\|\| psz[3] != ' '
1665	\|\| psz[cch - 4] != ' '
1666	\|\| psz[cch - 3] != ' '
1667	\|\| psz[cch - 2] != ' '
1668	\|\| psz[cch - 1] != '\|'
1669	\|\| cch != 1 + 3 + cchSectionNm + 3 + 1
1670	\|\| strncmp(&psz[4], pszSectionNm, cchSectionNm)
1671	)
1672	{
1673	RTMsgError("%s:%d: Expected section box: \| %s \|", pMap->pszMapFile, pMap->iLine, pszSectionNm);
1674	return false;
1675	}
1676
1677	/* +------------+ */
1678	psz = mapReadLineStrip(pMap, &cch);
1679	if (!psz)
1680	return false;
1681	if ( psz[0] != '+'
1682	\|\| psz[1] != '-'
1683	\|\| psz[2] != '-'
1684	\|\| psz[3] != '-'
1685	\|\| psz[cch - 4] != '-'
1686	\|\| psz[cch - 3] != '-'
1687	\|\| psz[cch - 2] != '-'
1688	\|\| psz[cch - 1] != '+'
1689	)
1690	{
1691	RTMsgError("%s:%d: Expected section box: +-----...", pMap->pszMapFile, pMap->iLine);
1692	return false;
1693	}
1694
1695	/* There may be a few lines describing the table notation now, surrounded by blank lines. */
1696	do
1697	{
1698	psz = mapReadLineStripRight(pMap, &cch);
1699	if (!psz)
1700	return false;
1701	} while ( *psz == '\0'
1702	\|\| ( !RT_C_IS_SPACE(psz[0])
1703	&& RT_C_IS_SPACE(psz[1])
1704	&& psz[2] == '='
1705	&& RT_C_IS_SPACE(psz[3]))
1706	);
1707
1708	/* Should have the column heading now. */
1709	va_list va;
1710	va_start(va, cColumns);
1711	for (uint32_t i = 0; i < cColumns; i++)
1712	{
1713	const char pszColumn = va_arg(va, const char );
1714	size_t cchColumn = strlen(pszColumn);
1715	if ( strncmp(psz, pszColumn, cchColumn)
1716	\|\| ( psz[cchColumn] != '\0'
1717	&& !RT_C_IS_SPACE(psz[cchColumn])))
1718	{
1719	va_end(va);
1720	RTMsgError("%s:%d: Expected column '%s' found '%s'", pMap->pszMapFile, pMap->iLine, pszColumn, psz);
1721	return false;
1722	}
1723	psz += cchColumn;
1724	while (RT_C_IS_SPACE(*psz))
1725	psz++;
1726	}
1727	va_end(va);
1728
1729	/* The next line is the underlining. */
1730	psz = mapReadLineStripRight(pMap, &cch);
1731	if (!psz)
1732	return false;
1733	if (*psz != '=' \|\| psz[cch - 1] != '=')
1734	{
1735	RTMsgError("%s:%d: Expected column header underlining", pMap->pszMapFile, pMap->iLine);
1736	return false;
1737	}
1738
1739	/* Skip one blank line. */
1740	psz = mapReadLineStripRight(pMap, &cch);
1741	if (!psz)
1742	return false;
1743	if (*psz)
1744	{
1745	RTMsgError("%s:%d: Expected blank line beneath the column headers", pMap->pszMapFile, pMap->iLine);
1746	return false;
1747	}
1748
1749	return true;
1750	}
1751
1752
1753	/**
1754	* Parses a segment list.
1755	*
1756	* @returns @c true on success, @c false + msg on failure, @c false on eof.
1757	* @param pMap The map file handle.
1758	*/
1759	static bool mapParseSegments(PBIOSMAP pMap)
1760	{
1761	for (;;)
1762	{
1763	if (!mapReadLineStripRight(pMap, NULL))
1764	return false;
1765
1766	/* The end? The line should be empty. Expectes segment name to not
1767	start with a space. */
1768	if (!pMap->szLine[0] \|\| RT_C_IS_SPACE(pMap->szLine[0]))
1769	{
1770	if (!pMap->szLine[0])
1771	return true;
1772	RTMsgError("%s:%u: Malformed segment line", pMap->pszMapFile, pMap->iLine);
1773	return false;
1774	}
1775
1776	/* Parse the segment line. */
1777	uint32_t iSeg = g_cSegs;
1778	if (iSeg >= RT_ELEMENTS(g_aSegs))
1779	{
1780	RTMsgError("%s:%u: Too many segments", pMap->pszMapFile, pMap->iLine);
1781	return false;
1782	}
1783
1784	char *psz = pMap->szLine;
1785	if (!mapParseWord(&psz, g_aSegs[iSeg].szName, sizeof(g_aSegs[iSeg].szName)))
1786	RTMsgError("%s:%u: Segment name parser error", pMap->pszMapFile, pMap->iLine);
1787	else if (!mapParseWord(&psz, g_aSegs[iSeg].szClass, sizeof(g_aSegs[iSeg].szClass)))
1788	RTMsgError("%s:%u: Segment class parser error", pMap->pszMapFile, pMap->iLine);
1789	else if (!mapParseWord(&psz, g_aSegs[iSeg].szGroup, sizeof(g_aSegs[iSeg].szGroup)))
1790	RTMsgError("%s:%u: Segment group parser error", pMap->pszMapFile, pMap->iLine);
1791	else if (!mapParseAddress(&psz, &g_aSegs[iSeg].Address))
1792	RTMsgError("%s:%u: Segment address parser error", pMap->pszMapFile, pMap->iLine);
1793	else if (!mapParseSize(&psz, &g_aSegs[iSeg].cb))
1794	RTMsgError("%s:%u: Segment size parser error", pMap->pszMapFile, pMap->iLine);
1795	else
1796	{
1797	g_aSegs[iSeg].uFlatAddr = ((uint32_t)g_aSegs[iSeg].Address.sel << 4) + g_aSegs[iSeg].Address.off;
1798	g_cSegs++;
1799	if (g_cVerbose > 2)
1800	RTStrmPrintf(g_pStdErr, "read segment at %08x / %04x:%04x LB %04x %s / %s / %s\n",
1801	g_aSegs[iSeg].uFlatAddr,
1802	g_aSegs[iSeg].Address.sel,
1803	g_aSegs[iSeg].Address.off,
1804	g_aSegs[iSeg].cb,
1805	g_aSegs[iSeg].szName,
1806	g_aSegs[iSeg].szClass,
1807	g_aSegs[iSeg].szGroup);
1808
1809	while (RT_C_IS_SPACE(*psz))
1810	psz++;
1811	if (!*psz)
1812	continue;
1813	RTMsgError("%s:%u: Junk at end of line", pMap->pszMapFile, pMap->iLine);
1814	}
1815	return false;
1816	}
1817	}
1818
1819
1820	/**
1821	* Sorts the segment array by flat address and adds them to the debug module.
1822	*
1823	* @returns @c true on success, @c false + msg on failure, @c false on eof.
1824	*/
1825	static bool mapSortAndAddSegments(void)
1826	{
1827	for (uint32_t i = 0; i < g_cSegs; i++)
1828	{
1829	for (uint32_t j = i + 1; j < g_cSegs; j++)
1830	if (g_aSegs[j].uFlatAddr < g_aSegs[i].uFlatAddr)
1831	{
1832	BIOSSEG Tmp = g_aSegs[i];
1833	g_aSegs[i] = g_aSegs[j];
1834	g_aSegs[j] = Tmp;
1835	}
1836	g_aSegs[i].uRva = g_aSegs[i].uFlatAddr - g_aSegs[0].uFlatAddr;
1837
1838	if (g_cVerbose > 0)
1839	RTStrmPrintf(g_pStdErr, "segment at %08x / %04x / %04x:%04x LB %04x %s / %s / %s\n",
1840	g_aSegs[i].uFlatAddr,
1841	g_aSegs[i].uRva,
1842	g_aSegs[i].Address.sel,
1843	g_aSegs[i].Address.off,
1844	g_aSegs[i].cb,
1845	g_aSegs[i].szName,
1846	g_aSegs[i].szClass,
1847	g_aSegs[i].szGroup);
1848
1849	RTDBGSEGIDX idx = i;
1850	int rc = RTDbgModSegmentAdd(g_hMapMod, g_aSegs[i].uFlatAddr, g_aSegs[i].cb, g_aSegs[i].szName, 0 /fFlags/, &idx);
1851	if (RT_FAILURE(rc))
1852	{
1853	RTMsgError("RTDbgModSegmentAdd failed on %s: %Rrc", g_aSegs[i].szName);
1854	return false;
1855	}
1856	}
1857	return true;
1858	}
1859
1860
1861	/**
1862	* Parses a segment list.
1863	*
1864	* @returns @c true on success, @c false + msg on failure, @c false on eof.
1865	* @param pMap The map file handle.
1866	*/
1867	static bool mapParseSymbols(PBIOSMAP pMap)
1868	{
1869	for (;;)
1870	{
1871	if (!mapReadLineStripRight(pMap, NULL))
1872	return false;
1873
1874	/* The end? The line should be empty. Expectes segment name to not
1875	start with a space. */
1876	if (!pMap->szLine[0] \|\| RT_C_IS_SPACE(pMap->szLine[0]))
1877	{
1878	if (!pMap->szLine[0])
1879	return true;
1880	return mapError(pMap, "Malformed symbol line");
1881	}
1882
1883	if (!strncmp(pMap->szLine, RT_STR_TUPLE("Module: ")))
1884	{
1885	/* Parse the module line. */
1886	size_t offObj = sizeof("Module: ") - 1;
1887	while (RT_C_IS_SPACE(pMap->szLine[offObj]))
1888	offObj++;
1889	size_t offSrc = offObj;
1890	char ch;
1891	while ((ch = pMap->szLine[offSrc]) != '(' && ch != '\0')
1892	offSrc++;
1893	size_t cchObj = offSrc - offObj;
1894
1895	offSrc++;
1896	size_t cchSrc = offSrc;
1897	while ((ch = pMap->szLine[cchSrc]) != ')' && ch != '\0')
1898	cchSrc++;
1899	cchSrc -= offSrc;
1900	if (ch != ')')
1901	return mapError(pMap, "Symbol/Module line parse error");
1902
1903	PBIOSOBJFILE pObjFile = (PBIOSOBJFILE)RTMemAllocZ(sizeof(*pObjFile) + cchSrc + cchObj + 2);
1904	if (!pObjFile)
1905	return mapError(pMap, "Out of memory");
1906	char psz = (char )(pObjFile + 1);
1907	pObjFile->pszObject = psz;
1908	memcpy(psz, &pMap->szLine[offObj], cchObj);
1909	psz += cchObj;
1910	*psz++ = '\0';
1911	pObjFile->pszSource = psz;
1912	memcpy(psz, &pMap->szLine[offSrc], cchSrc);
1913	psz[cchSrc] = '\0';
1914	RTListAppend(&g_ObjList, &pObjFile->Node);
1915	}
1916	else
1917	{
1918	/* Parse the segment line. */
1919	RTFAR16 Addr;
1920	char *psz = pMap->szLine;
1921	if (!mapParseAddress(&psz, &Addr))
1922	return mapError(pMap, "Symbol address parser error");
1923
1924	char szName[4096];
1925	if (!mapParseWord(&psz, szName, sizeof(szName)))
1926	return mapError(pMap, "Symbol name parser error");
1927
1928	uint32_t uFlatAddr = ((uint32_t)Addr.sel << 4) + Addr.off;
1929	if (uFlatAddr != 0)
1930	{
1931	int rc = RTDbgModSymbolAdd(g_hMapMod, szName, RTDBGSEGIDX_RVA, uFlatAddr, 0 /cb/, 0 /fFlags/, NULL);
1932	if (RT_FAILURE(rc) && rc != VERR_DBG_ADDRESS_CONFLICT)
1933	{
1934	/* HACK ALERT! For dealing with lables at segment size. / /* @todo fix end labels. */
1935	rc = RTDbgModSymbolAdd(g_hMapMod, szName, RTDBGSEGIDX_RVA, uFlatAddr - 1, 0 /cb/, 0 /fFlags/, NULL);
1936	if (RT_FAILURE(rc) && rc != VERR_DBG_ADDRESS_CONFLICT)
1937	return mapError(pMap, "RTDbgModSymbolAdd failed: %Rrc", rc);
1938	}
1939
1940	if (g_cVerbose > 2)
1941	RTStrmPrintf(g_pStdErr, "read symbol - %08x %s\n", uFlatAddr, szName);
1942	while (RT_C_IS_SPACE(*psz))
1943	psz++;
1944	if (*psz)
1945	return mapError(pMap, "Junk at end of line");
1946	}
1947
1948	}
1949	}
1950	}
1951
1952
1953	/**
1954	* Parses the given map file.
1955	*
1956	* @returns RTEXITCODE_SUCCESS and lots of globals, or RTEXITCODE_FAILURE and a
1957	* error message.
1958	* @param pMap The map file handle.
1959	*/
1960	static RTEXITCODE mapParseFile(PBIOSMAP pMap)
1961	{
1962	int rc = RTDbgModCreate(&g_hMapMod, "VBoxBios", 0 /cbSeg/, 0 /fFlags/);
1963	if (RT_FAILURE(rc))
1964	return RTMsgErrorExit(RTEXITCODE_FAILURE, "RTDbgModCreate failed: %Rrc", rc);
1965
1966	/*
1967	* Read the header.
1968	*/
1969	if (!mapReadLine(pMap))
1970	return RTEXITCODE_FAILURE;
1971	if (strncmp(pMap->szLine, RT_STR_TUPLE("Open Watcom Linker Version")))
1972	return RTMsgErrorExit(RTEXITCODE_FAILURE, "Unexpected map-file header: '%s'", pMap->szLine);
1973	if ( !mapSkipNonEmptyLines(pMap)
1974	\|\| !mapSkipEmptyLines(pMap))
1975	return RTEXITCODE_FAILURE;
1976
1977	/*
1978	* Skip groups.
1979	*/
1980	if (!mapSkipThruColumnHeadings(pMap, "Groups", 3, "Group", "Address", "Size", NULL))
1981	return RTEXITCODE_FAILURE;
1982	if (!mapSkipNonEmptyLines(pMap))
1983	return RTEXITCODE_FAILURE;
1984
1985	/*
1986	* Parse segments.
1987	*/
1988	if (!mapSkipThruColumnHeadings(pMap, "Segments", 5, "Segment", "Class", "Group", "Address", "Size"))
1989	return RTEXITCODE_FAILURE;
1990	if (!mapParseSegments(pMap))
1991	return RTEXITCODE_FAILURE;
1992	if (!mapSortAndAddSegments())
1993	return RTEXITCODE_FAILURE;
1994
1995	/*
1996	* Parse symbols.
1997	*/
1998	if (!mapSkipThruColumnHeadings(pMap, "Memory Map", 2, "Address", "Symbol"))
1999	return RTEXITCODE_FAILURE;
2000	if (!mapParseSymbols(pMap))
2001	return RTEXITCODE_FAILURE;
2002
2003	/* Ignore the rest of the file. */
2004	return RTEXITCODE_SUCCESS;
2005	}
2006
2007
2008	/**
2009	* Parses the linker map file for the BIOS.
2010	*
2011	* This is generated by the Watcom linker.
2012	*
2013	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
2014	* @param pszBiosMap Path to the map file.
2015	*/
2016	static RTEXITCODE ParseMapFile(const char *pszBiosMap)
2017	{
2018	BIOSMAP Map;
2019	Map.pszMapFile = pszBiosMap;
2020	Map.hStrm = NULL;
2021	Map.iLine = 0;
2022	Map.fEof = false;
2023	Map.cch = 0;
2024	Map.offNW = 0;
2025	int rc = RTStrmOpen(pszBiosMap, "r", &Map.hStrm);
2026	if (RT_FAILURE(rc))
2027	return RTMsgErrorExit(RTEXITCODE_FAILURE, "Error opening '%s': %Rrc", pszBiosMap, rc);
2028	RTEXITCODE rcExit = mapParseFile(&Map);
2029	RTStrmClose(Map.hStrm);
2030	return rcExit;
2031	}
2032
2033
2034	/**
2035	* Reads the BIOS image into memory (g_pbImg and g_cbImg).
2036	*
2037	* @returns RTEXITCODE_SUCCESS or RTEXITCODE_FAILURE+msg.
2038	* @param pszBiosImg Path to the image file.
2039	*/
2040	static RTEXITCODE ReadBiosImage(const char *pszBiosImg)
2041	{
2042	void *pvImg;
2043	size_t cbImg;
2044	int rc = RTFileReadAll(pszBiosImg, &pvImg, &cbImg);
2045	if (RT_FAILURE(rc))
2046	return RTMsgErrorExit(RTEXITCODE_FAILURE, "Error reading '%s': %Rrc", pszBiosImg, rc);
2047
2048	size_t cbImgExpect;
2049	switch (g_enmBiosType)
2050	{
2051	case kBiosType_System: cbImgExpect = _64K; break;
2052	case kBiosType_Vga: cbImgExpect = _32K; break;
2053	default: cbImgExpect = 0; break;
2054	}
2055	if (cbImg != cbImgExpect)
2056	{
2057	RTFileReadAllFree(pvImg, cbImg);
2058	return RTMsgErrorExit(RTEXITCODE_FAILURE, "The BIOS image %u bytes intead of %u bytes", cbImg, cbImgExpect);
2059	}
2060
2061	g_pbImg = (uint8_t *)pvImg;
2062	g_cbImg = cbImg;
2063	return RTEXITCODE_SUCCESS;
2064	}
2065
2066
2067	int main(int argc, char **argv)
2068	{
2069	int rc = RTR3InitExe(argc, &argv, 0);
2070	if (RT_FAILURE(rc))
2071	return RTMsgInitFailure(rc);
2072
2073	RTListInit(&g_ObjList);
2074
2075	/*
2076	* Option config.
2077	*/
2078	static RTGETOPTDEF const s_aOpts[] =
2079	{
2080	{ "--bios-image", 'i', RTGETOPT_REQ_STRING },
2081	{ "--bios-map", 'm', RTGETOPT_REQ_STRING },
2082	{ "--bios-sym", 's', RTGETOPT_REQ_STRING },
2083	{ "--bios-type", 't', RTGETOPT_REQ_STRING },
2084	{ "--output", 'o', RTGETOPT_REQ_STRING },
2085	{ "--verbose", 'v', RTGETOPT_REQ_NOTHING },
2086	{ "--quiet", 'q', RTGETOPT_REQ_NOTHING },
2087	};
2088
2089	const char *pszBiosMap = NULL;
2090	const char *pszBiosSym = NULL;
2091	const char *pszBiosImg = NULL;
2092	const char *pszOutput = NULL;
2093
2094	RTGETOPTUNION ValueUnion;
2095	RTGETOPTSTATE GetOptState;
2096	rc = RTGetOptInit(&GetOptState, argc, argv, &s_aOpts[0], RT_ELEMENTS(s_aOpts), 1, RTGETOPTINIT_FLAGS_OPTS_FIRST);
2097	AssertReleaseRCReturn(rc, RTEXITCODE_FAILURE);
2098
2099	/*
2100	* Process the options.
2101	*/
2102	while ((rc = RTGetOpt(&GetOptState, &ValueUnion)) != 0)
2103	{
2104	switch (rc)
2105	{
2106	case 'i':
2107	if (pszBiosImg)
2108	return RTMsgErrorExit(RTEXITCODE_SYNTAX, "--bios-image is given more than once");
2109	pszBiosImg = ValueUnion.psz;
2110	break;
2111
2112	case 'm':
2113	if (pszBiosMap)
2114	return RTMsgErrorExit(RTEXITCODE_SYNTAX, "--bios-map is given more than once");
2115	pszBiosMap = ValueUnion.psz;
2116	break;
2117
2118	case 's':
2119	if (pszBiosSym)
2120	return RTMsgErrorExit(RTEXITCODE_SYNTAX, "--bios-sym is given more than once");
2121	pszBiosSym = ValueUnion.psz;
2122	break;
2123
2124	case 'o':
2125	if (pszOutput)
2126	return RTMsgErrorExit(RTEXITCODE_SYNTAX, "--output is given more than once");
2127	pszOutput = ValueUnion.psz;
2128	break;
2129
2130	case 't':
2131	if (!strcmp(ValueUnion.psz, "system"))
2132	{
2133	g_enmBiosType = kBiosType_System;
2134	g_uBiosFlatBase = 0xf0000;
2135	}
2136	else if (!strcmp(ValueUnion.psz, "vga"))
2137	{
2138	g_enmBiosType = kBiosType_Vga;
2139	g_uBiosFlatBase = 0xc0000;
2140	}
2141	else
2142	return RTMsgErrorExit(RTEXITCODE_SYNTAX, "Unknown bios type '%s'", ValueUnion.psz);
2143	break;
2144
2145	case 'v':
2146	g_cVerbose++;
2147	break;
2148
2149	case 'q':
2150	g_cVerbose = 0;
2151	break;
2152
2153	case 'H':
2154	RTPrintf("usage: %Rbn --bios-image <file.img> --bios-map <file.map> [--output <file.asm>]\n",
2155	argv[0]);
2156	return RTEXITCODE_SUCCESS;
2157
2158	case 'V':
2159	{
2160	/* The following is assuming that svn does it's job here. */
2161	char szRev[] = "$Revision: 103005 $";
2162	char *psz = szRev;
2163	while (psz && !RT_C_IS_DIGIT(psz))
2164	psz++;
2165	size_t i = strlen(psz);
2166	while (i > 0 && !RT_C_IS_DIGIT(psz[i - 1]))
2167	psz[--i] = '\0';
2168
2169	RTPrintf("r%s\n", psz);
2170	return RTEXITCODE_SUCCESS;
2171	}
2172
2173	default:
2174	return RTGetOptPrintError(rc, &ValueUnion);
2175	}
2176	}
2177
2178	/*
2179	* Got it all?
2180	*/
2181	if (!pszBiosImg)
2182	return RTMsgErrorExit(RTEXITCODE_SYNTAX, "--bios-image is required");
2183	if (!pszBiosMap)
2184	return RTMsgErrorExit(RTEXITCODE_SYNTAX, "--bios-map is required");
2185	if (!pszBiosSym)
2186	return RTMsgErrorExit(RTEXITCODE_SYNTAX, "--bios-sym is required");
2187
2188	/*
2189	* Do the job.
2190	*/
2191	RTEXITCODE rcExit;
2192	rcExit = ReadBiosImage(pszBiosImg);
2193	if (rcExit == RTEXITCODE_SUCCESS)
2194	rcExit = ParseMapFile(pszBiosMap);
2195	if (rcExit == RTEXITCODE_SUCCESS)
2196	rcExit = ParseSymFile(pszBiosSym);
2197	if (rcExit == RTEXITCODE_SUCCESS)
2198	rcExit = OpenOutputFile(pszOutput);
2199	if (rcExit == RTEXITCODE_SUCCESS)
2200	rcExit = DisassembleBiosImage();
2201
2202	return rcExit;
2203	}
2204

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source: vbox/trunk/src/VBox/Devices/BiosCommonCode/MakeAlternativeSource.cpp@ 105381

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