DBGPlugInDarwin.cpp@ 95638

Last change on this file since 95638 was 93470, checked in by vboxsync, 3 years ago
DbgPlugInDiggers,VMM,Main: Refactored the diggers and related interfaces to work via the VMM function table. Removed non-working tstVBoxDbg (needs proper COM now). bugref:10072
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 41.3 KB

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1	/* $Id: DBGPlugInDarwin.cpp 93470 2022-01-27 23:51:28Z vboxsync $ */
2	/** @file
3	* DBGPlugInDarwin - Debugger and Guest OS Digger Plugin For Darwin / OS X.
4	*/
5
6	/*
7	* Copyright (C) 2008-2022 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18
19	/*********************************************************************************************************************************
20	* Header Files *
21	*********************************************************************************************************************************/
22	#define LOG_GROUP LOG_GROUP_DBGF /// @todo add new log group.
23	#include "DBGPlugIns.h"
24	#include <VBox/vmm/vmmr3vtable.h>
25	#include <iprt/err.h>
26	#include <iprt/mem.h>
27	#include <iprt/stream.h>
28	#include <iprt/string.h>
29	#include <iprt/uuid.h>
30	#include <iprt/ctype.h>
31	#include <iprt/formats/mach-o.h>
32
33	#undef LogRel2
34	#define LogRel2 LogRel
35
36
37	/*********************************************************************************************************************************
38	* Structures and Typedefs *
39	*********************************************************************************************************************************/
40
41	/** @name Internal Darwin structures
42	* @{ */
43
44	/**
45	* 32-bit darwin kernel module info structure (kmod_info_t).
46	*/
47	typedef struct OSX32_kmod_info
48	{
49	uint32_t next;
50	int32_t info_version;
51	uint32_t id;
52	char name[64];
53	char version[64];
54	int32_t reference_count;
55	uint32_t reference_list; /*< Points to kmod_reference_t. /
56	uint32_t address; /*< Where in memory the kext is loaded. /
57	uint32_t size;
58	uint32_t hdr_size;
59	uint32_t start; /*< Address of kmod_start_func_t. /
60	uint32_t stop; /*< Address of kmod_stop_func_t. /
61	} OSX32_kmod_info_t;
62
63	/**
64	* 32-bit darwin kernel module info structure (kmod_info_t).
65	*/
66	#pragma pack(1)
67	typedef struct OSX64_kmod_info
68	{
69	uint64_t next;
70	int32_t info_version;
71	uint32_t id;
72	char name[64];
73	char version[64];
74	int32_t reference_count;
75	uint64_t reference_list; /*< Points to kmod_reference_t. Misaligned, duh. /
76	uint64_t address; /*< Where in memory the kext is loaded. /
77	uint64_t size;
78	uint64_t hdr_size;
79	uint64_t start; /*< Address of kmod_start_func_t. /
80	uint64_t stop; /*< Address of kmod_stop_func_t. /
81	} OSX64_kmod_info_t;
82	#pragma pack()
83
84	/** The value of the info_version field. */
85	#define OSX_KMOD_INFO_VERSION INT32_C(1)
86
87	/** @} */
88
89
90	/**
91	* Linux guest OS digger instance data.
92	*/
93	typedef struct DBGDIGGERDARWIN
94	{
95	/** Whether the information is valid or not.
96	* (For fending off illegal interface method calls.) */
97	bool fValid;
98
99	/** Set if 64-bit kernel, clear if 32-bit.
100	* Set during probing. */
101	bool f64Bit;
102	/** The address of an kernel version string (there are several).
103	* This is set during probing. */
104	DBGFADDRESS AddrKernelVersion;
105	/** Kernel base address.
106	* This is set during probing. */
107	DBGFADDRESS AddrKernel;
108
109	/** The kernel message log interface. */
110	DBGFOSIDMESG IDmesg;
111	} DBGDIGGERDARWIN;
112	/** Pointer to the linux guest OS digger instance data. */
113	typedef DBGDIGGERDARWIN *PDBGDIGGERDARWIN;
114
115
116	/*********************************************************************************************************************************
117	* Defined Constants And Macros *
118	*********************************************************************************************************************************/
119	/** Validates a 32-bit darwin kernel address */
120	#define OSX32_VALID_ADDRESS(Addr) ((Addr) > UINT32_C(0x00001000) && (Addr) < UINT32_C(0xfffff000))
121	/** Validates a 64-bit darwin kernel address */
122	#define OSX64_VALID_ADDRESS(Addr) ((Addr) > UINT64_C(0xffff800000000000) && (Addr) < UINT64_C(0xfffffffffffff000))
123	/** Validates a 32-bit or 64-bit darwin kernel address. */
124	#define OSX_VALID_ADDRESS(a_f64Bits, a_Addr) \
125	((a_f64Bits) ? OSX64_VALID_ADDRESS(a_Addr) : OSX32_VALID_ADDRESS(a_Addr))
126
127	/** AppleOsX on little endian ASCII systems. */
128	#define DIG_DARWIN_MOD_TAG UINT64_C(0x58734f656c707041)
129
130
131	/*********************************************************************************************************************************
132	* Internal Functions *
133	*********************************************************************************************************************************/
134	static DECLCALLBACK(int) dbgDiggerDarwinInit(PUVM pUVM, PCVMMR3VTABLE pVMM, void *pvData);
135
136
137
138	/**
139	* @interface_method_impl{DBGFOSIDMESG,pfnQueryKernelLog}
140	*/
141	static DECLCALLBACK(int) dbgDiggerDarwinIDmsg_QueryKernelLog(PDBGFOSIDMESG pThis, PUVM pUVM, PCVMMR3VTABLE pVMM, uint32_t fFlags,
142	uint32_t cMessages, char pszBuf, size_t cbBuf, size_t pcbActual)
143	{
144	RT_NOREF1(fFlags);
145	PDBGDIGGERDARWIN pData = RT_FROM_MEMBER(pThis, DBGDIGGERDARWIN, IDmesg);
146
147	if (cMessages < 1)
148	return VERR_INVALID_PARAMETER;
149
150	/*
151	* The 'msgbufp' variable points to a struct msgbuf (bsd/kern/subr_log.c).
152	*/
153	RTDBGAS hAs = pVMM->pfnDBGFR3AsResolveAndRetain(pUVM, DBGF_AS_KERNEL);
154	RTDBGMOD hMod;
155	int rc = RTDbgAsModuleByName(hAs, "mach_kernel", 0, &hMod);
156	if (RT_FAILURE(rc))
157	return VERR_NOT_FOUND;
158	RTDbgAsRelease(hAs);
159
160	DBGFADDRESS Addr;
161	RTGCPTR GCPtrMsgBufP = 0;
162	RTDBGSYMBOL SymInfo;
163	rc = RTDbgModSymbolByName(hMod, "_msgbufp", &SymInfo);
164	if (RT_SUCCESS(rc))
165	{
166	rc = pVMM->pfnDBGFR3MemRead(pUVM, 0 /idCpu/,
167	pVMM->pfnDBGFR3AddrFromFlat(pUVM, &Addr, SymInfo.Value + pData->AddrKernel.FlatPtr),
168	&GCPtrMsgBufP, pData->f64Bit ? sizeof(uint64_t) : sizeof(uint32_t));
169	if (RT_FAILURE(rc))
170	{
171	LogRel(("dbgDiggerDarwinIDmsg_QueryKernelLog: failed to read _msgbufp at %RGv: %Rrc\n", Addr.FlatPtr, rc));
172	return VERR_NOT_FOUND;
173	}
174	if (!OSX_VALID_ADDRESS(pData->f64Bit, GCPtrMsgBufP))
175	{
176	LogRel(("dbgDiggerDarwinIDmsg_QueryKernelLog: Invalid address for _msgbufp: %RGv\n", GCPtrMsgBufP));
177	return VERR_NOT_FOUND;
178	}
179	}
180	else
181	{
182	rc = RTDbgModSymbolByName(hMod, "_msgbuf", &SymInfo);
183	if (RT_FAILURE(rc))
184	{
185	LogRel(("dbgDiggerDarwinIDmsg_QueryKernelLog: failed to find _msgbufp and _msgbuf: %Rrc\n", rc));
186	return VERR_NOT_FOUND;
187	}
188	GCPtrMsgBufP = SymInfo.Value + pData->AddrKernel.FlatPtr;
189	if (!OSX_VALID_ADDRESS(pData->f64Bit, GCPtrMsgBufP))
190	{
191	LogRel(("dbgDiggerDarwinIDmsg_QueryKernelLog: Invalid address for _msgbuf: %RGv\n", GCPtrMsgBufP));
192	return VERR_NOT_FOUND;
193	}
194	}
195
196	/*
197	* Read the msgbuf structure.
198	*/
199	struct
200	{
201	uint32_t msg_magic;
202	uint32_t msg_size;
203	uint32_t msg_bufx;
204	uint32_t msg_bufr;
205	uint64_t msg_bufc; /*< Size depends on windows size. /
206	} MsgBuf;
207	rc = pVMM->pfnDBGFR3MemRead(pUVM, 0 /idCpu/, pVMM->pfnDBGFR3AddrFromFlat(pUVM, &Addr, GCPtrMsgBufP),
208	&MsgBuf, sizeof(MsgBuf) - (pData->f64Bit ? 0 : sizeof(uint32_t)) );
209	if (RT_FAILURE(rc))
210	{
211	LogRel(("dbgDiggerDarwinIDmsg_QueryKernelLog: failed to read msgbuf struct at %RGv: %Rrc\n", Addr.FlatPtr, rc));
212	return VERR_NOT_FOUND;
213	}
214	if (!pData->f64Bit)
215	MsgBuf.msg_bufc &= UINT32_MAX;
216
217	/*
218	* Validate the structure.
219	*/
220	if ( MsgBuf.msg_magic != UINT32_C(0x63061)
221	\|\| MsgBuf.msg_size < UINT32_C(4096)
222	\|\| MsgBuf.msg_size > 16*_1M
223	\|\| MsgBuf.msg_bufx > MsgBuf.msg_size
224	\|\| MsgBuf.msg_bufr > MsgBuf.msg_size
225	\|\| !OSX_VALID_ADDRESS(pData->f64Bit, MsgBuf.msg_bufc) )
226	{
227	LogRel(("dbgDiggerDarwinIDmsg_QueryKernelLog: Invalid MsgBuf data: magic=%#x size=%#x bufx=%#x bufr=%#x bufc=%RGv\n",
228	MsgBuf.msg_magic, MsgBuf.msg_size, MsgBuf.msg_bufx, MsgBuf.msg_bufr, MsgBuf.msg_bufc));
229	return VERR_INVALID_STATE;
230	}
231
232	/*
233	* Read the buffer.
234	*/
235	char pchMsgBuf = (char )RTMemAlloc(MsgBuf.msg_size);
236	if (!pchMsgBuf)
237	{
238	LogRel(("dbgDiggerDarwinIDmsg_QueryKernelLog: Failed to allocate %#x bytes of memory for the log buffer\n",
239	MsgBuf.msg_size));
240	return VERR_INVALID_STATE;
241	}
242	rc = pVMM->pfnDBGFR3MemRead(pUVM, 0 /idCpu/,
243	pVMM->pfnDBGFR3AddrFromFlat(pUVM, &Addr, MsgBuf.msg_bufc), pchMsgBuf, MsgBuf.msg_size);
244	if (RT_SUCCESS(rc))
245	{
246	/*
247	* Copy it out raw.
248	*/
249	uint32_t offDst = 0;
250	if (MsgBuf.msg_bufr < MsgBuf.msg_bufx)
251	{
252	/* Single chunk between the read and write offsets. */
253	uint32_t cbToCopy = MsgBuf.msg_bufx - MsgBuf.msg_bufr;
254	if (cbToCopy < cbBuf)
255	{
256	memcpy(pszBuf, &pchMsgBuf[MsgBuf.msg_bufr], cbToCopy);
257	pszBuf[cbToCopy] = '\0';
258	rc = VINF_SUCCESS;
259	}
260	else
261	{
262	if (cbBuf)
263	{
264	memcpy(pszBuf, &pchMsgBuf[MsgBuf.msg_bufr], cbBuf - 1);
265	pszBuf[cbBuf - 1] = '\0';
266	}
267	rc = VERR_BUFFER_OVERFLOW;
268	}
269	offDst = cbToCopy + 1;
270	}
271	else
272	{
273	/* Two chunks, read offset to end, start to write offset. */
274	uint32_t cbFirst = MsgBuf.msg_size - MsgBuf.msg_bufr;
275	uint32_t cbSecond = MsgBuf.msg_bufx;
276	if (cbFirst + cbSecond < cbBuf)
277	{
278	memcpy(pszBuf, &pchMsgBuf[MsgBuf.msg_bufr], cbFirst);
279	memcpy(&pszBuf[cbFirst], pchMsgBuf, cbSecond);
280	offDst = cbFirst + cbSecond;
281	pszBuf[offDst++] = '\0';
282	rc = VINF_SUCCESS;
283	}
284	else
285	{
286	offDst = cbFirst + cbSecond + 1;
287	if (cbFirst < cbBuf)
288	{
289	memcpy(pszBuf, &pchMsgBuf[MsgBuf.msg_bufr], cbFirst);
290	memcpy(&pszBuf[cbFirst], pchMsgBuf, cbBuf - cbFirst);
291	pszBuf[cbBuf - 1] = '\0';
292	}
293	else if (cbBuf)
294	{
295	memcpy(pszBuf, &pchMsgBuf[MsgBuf.msg_bufr], cbBuf - 1);
296	pszBuf[cbBuf - 1] = '\0';
297	}
298	rc = VERR_BUFFER_OVERFLOW;
299	}
300	}
301
302	if (pcbActual)
303	*pcbActual = offDst;
304	}
305	else
306	LogRel(("dbgDiggerDarwinIDmsg_QueryKernelLog: Error reading %#x bytes at %RGv: %Rrc\n",
307	MsgBuf.msg_size, MsgBuf.msg_bufc, rc));
308	RTMemFree(pchMsgBuf);
309	return rc;
310	}
311
312
313	/**
314	* @copydoc DBGFOSREG::pfnStackUnwindAssist
315	*/
316	static DECLCALLBACK(int) dbgDiggerDarwinStackUnwindAssist(PUVM pUVM, PCVMMR3VTABLE pVMM, void *pvData, VMCPUID idCpu,
317	PDBGFSTACKFRAME pFrame, PRTDBGUNWINDSTATE pState, PCCPUMCTX pInitialCtx,
318	RTDBGAS hAs, uint64_t *puScratch)
319	{
320	RT_NOREF(pUVM, pVMM, pvData, idCpu, pFrame, pState, pInitialCtx, hAs, puScratch);
321	return VINF_SUCCESS;
322	}
323
324
325	/**
326	* @copydoc DBGFOSREG::pfnQueryInterface
327	*/
328	static DECLCALLBACK(void ) dbgDiggerDarwinQueryInterface(PUVM pUVM, PCVMMR3VTABLE pVMM, void pvData, DBGFOSINTERFACE enmIf)
329	{
330	RT_NOREF(pUVM, pVMM);
331	PDBGDIGGERDARWIN pThis = (PDBGDIGGERDARWIN)pvData;
332	switch (enmIf)
333	{
334	case DBGFOSINTERFACE_DMESG:
335	return &pThis->IDmesg;
336
337	default:
338	return NULL;
339	}
340	}
341
342
343	/**
344	* @copydoc DBGFOSREG::pfnQueryVersion
345	*/
346	static DECLCALLBACK(int) dbgDiggerDarwinQueryVersion(PUVM pUVM, PCVMMR3VTABLE pVMM, void *pvData,
347	char *pszVersion, size_t cchVersion)
348	{
349	PDBGDIGGERDARWIN pThis = (PDBGDIGGERDARWIN)pvData;
350	Assert(pThis->fValid);
351
352	/*
353	* It's all in the linux banner.
354	*/
355	int rc = pVMM->pfnDBGFR3MemReadString(pUVM, 0, &pThis->AddrKernelVersion, pszVersion, cchVersion);
356	if (RT_SUCCESS(rc))
357	{
358	char *pszEnd = RTStrEnd(pszVersion, cchVersion);
359	AssertReturn(pszEnd, VERR_BUFFER_OVERFLOW);
360	while ( pszEnd > pszVersion
361	&& RT_C_IS_SPACE(pszEnd[-1]))
362	pszEnd--;
363	*pszEnd = '\0';
364	}
365	else
366	RTStrPrintf(pszVersion, cchVersion, "DBGFR3MemRead -> %Rrc", rc);
367
368	return rc;
369	}
370
371
372	/**
373	* @copydoc DBGFOSREG::pfnTerm
374	*/
375	static DECLCALLBACK(void) dbgDiggerDarwinTerm(PUVM pUVM, PCVMMR3VTABLE pVMM, void *pvData)
376	{
377	RT_NOREF(pUVM, pVMM);
378	PDBGDIGGERDARWIN pThis = (PDBGDIGGERDARWIN)pvData;
379
380	pThis->fValid = false;
381	}
382
383
384	/**
385	* @copydoc DBGFOSREG::pfnRefresh
386	*/
387	static DECLCALLBACK(int) dbgDiggerDarwinRefresh(PUVM pUVM, PCVMMR3VTABLE pVMM, void *pvData)
388	{
389	PDBGDIGGERDARWIN pThis = (PDBGDIGGERDARWIN)pvData;
390	NOREF(pThis);
391	Assert(pThis->fValid);
392
393	/*
394	* For now we'll flush and reload everything.
395	*/
396	dbgDiggerDarwinTerm(pUVM, pVMM, pvData);
397	return dbgDiggerDarwinInit(pUVM, pVMM, pvData);
398	}
399
400
401	/**
402	* Helper function that tries to accertain whether a segment (__LINKEDIT) is
403	* present or not.
404	*
405	* @returns true if present, false if not.
406	* @param pUVM The user mode VM structure.
407	* @param pVMM The VMM function table.
408	* @param uSegAddr The segment addresss.
409	* @param cbSeg The segment size.
410	* @param uMinAddr Lowest allowed address.
411	* @param uMaxAddr Highest allowed address.
412	*/
413	static bool dbgDiggerDarwinIsSegmentPresent(PUVM pUVM, PCVMMR3VTABLE pVMM, uint64_t uSegAddr, uint64_t cbSeg,
414	uint64_t uMinAddr, uint64_t uMaxAddr)
415	{
416	/*
417	* Validate the size and address.
418	*/
419	if (cbSeg < 32)
420	{
421	LogRel(("OSXDig: __LINKEDIT too small %#RX64\n", cbSeg));
422	return false;
423	}
424	if (cbSeg > uMaxAddr - uMinAddr)
425	{
426	LogRel(("OSXDig: __LINKEDIT too big %#RX64, max %#RX64\n", cbSeg, uMaxAddr - uMinAddr));
427	return false;
428	}
429
430	if (uSegAddr < uMinAddr)
431	{
432	LogRel(("OSXDig: __LINKEDIT too low %#RX64, min %#RX64\n", uSegAddr, uMinAddr));
433	return false;
434	}
435	if (uSegAddr > uMaxAddr)
436	{
437	LogRel(("OSXDig: __LINKEDIT too high %#RX64, max %#RX64\n", uSegAddr, uMaxAddr));
438	return false;
439	}
440	if (uSegAddr + cbSeg > uMaxAddr)
441	{
442	LogRel(("OSXDig: __LINKEDIT ends too high %#RX64 (%#RX64+%#RX64), max %#RX64\n",
443	uSegAddr + cbSeg, uSegAddr, cbSeg, uMaxAddr));
444	return false;
445	}
446
447	/*
448	* Check that all the pages are present.
449	*/
450	cbSeg += uSegAddr & X86_PAGE_OFFSET_MASK;
451	uSegAddr &= ~(uint64_t)X86_PAGE_OFFSET_MASK;
452	for (;;)
453	{
454	uint8_t abBuf[8];
455	DBGFADDRESS Addr;
456	int rc = pVMM->pfnDBGFR3MemRead(pUVM, 0 /idCpu/, pVMM->pfnDBGFR3AddrFromFlat(pUVM, &Addr, uSegAddr),
457	abBuf, sizeof(abBuf));
458	if (RT_FAILURE(rc))
459	{
460	LogRel(("OSXDig: __LINKEDIT read error at %#RX64: %Rrc\n", uSegAddr, rc));
461	return false;
462	}
463
464	/* Advance */
465	if (cbSeg <= X86_PAGE_SIZE)
466	return true;
467	cbSeg -= X86_PAGE_SIZE;
468	uSegAddr += X86_PAGE_SIZE;
469	}
470	}
471
472
473	/**
474	* Helper function that validates a segment (or section) name.
475	*
476	* @returns true if valid, false if not.
477	* @param pszName The name string.
478	* @param cbName The size of the string, including terminator.
479	*/
480	static bool dbgDiggerDarwinIsValidSegOrSectName(const char *pszName, size_t cbName)
481	{
482	/* ascii chars */
483	char ch;
484	size_t off = 0;
485	while (off < cbName && (ch = pszName[off]))
486	{
487	if (RT_C_IS_CNTRL(ch) \|\| ch >= 127)
488	return false;
489	off++;
490	}
491
492	/* Not empty nor 100% full. */
493	if (off == 0 \|\| off == cbName)
494	return false;
495
496	/* remainder should be zeros. */
497	while (off < cbName)
498	{
499	if (pszName[off])
500	return false;
501	off++;
502	}
503
504	return true;
505	}
506
507
508	static int dbgDiggerDarwinAddModule(PDBGDIGGERDARWIN pThis, PUVM pUVM, PCVMMR3VTABLE pVMM,
509	uint64_t uModAddr, const char pszName, bool pf64Bit)
510	{
511	RT_NOREF1(pThis);
512	union
513	{
514	uint8_t ab[2 * X86_PAGE_4K_SIZE];
515	mach_header_64_t Hdr64;
516	mach_header_32_t Hdr32;
517	} uBuf;
518
519	/* Read the first page of the image. */
520	DBGFADDRESS ModAddr;
521	int rc = pVMM->pfnDBGFR3MemRead(pUVM, 0 /idCpu/,
522	pVMM->pfnDBGFR3AddrFromFlat(pUVM, &ModAddr, uModAddr), uBuf.ab, X86_PAGE_4K_SIZE);
523	if (RT_FAILURE(rc))
524	return rc;
525
526	/* Validate the header. */
527	AssertCompileMembersSameSizeAndOffset(mach_header_64_t, magic, mach_header_32_t, magic);
528	if ( uBuf.Hdr64.magic != IMAGE_MACHO64_SIGNATURE
529	&& uBuf.Hdr32.magic != IMAGE_MACHO32_SIGNATURE)
530	return VERR_INVALID_EXE_SIGNATURE;
531	AssertCompileMembersSameSizeAndOffset(mach_header_64_t, cputype, mach_header_32_t, cputype);
532	bool f64Bit = uBuf.Hdr64.magic == IMAGE_MACHO64_SIGNATURE;
533	if (uBuf.Hdr32.cputype != (f64Bit ? CPU_TYPE_X86_64 : CPU_TYPE_I386))
534	return VERR_LDR_ARCH_MISMATCH;
535	AssertCompileMembersSameSizeAndOffset(mach_header_64_t, filetype, mach_header_32_t, filetype);
536	if ( uBuf.Hdr32.filetype != MH_EXECUTE
537	&& uBuf.Hdr32.filetype != (f64Bit ? MH_KEXT_BUNDLE : MH_OBJECT))
538	return VERR_BAD_EXE_FORMAT;
539	AssertCompileMembersSameSizeAndOffset(mach_header_64_t, ncmds, mach_header_32_t, ncmds);
540	if (uBuf.Hdr32.ncmds > 256)
541	return VERR_BAD_EXE_FORMAT;
542	AssertCompileMembersSameSizeAndOffset(mach_header_64_t, sizeofcmds, mach_header_32_t, sizeofcmds);
543	if (uBuf.Hdr32.sizeofcmds > X86_PAGE_4K_SIZE * 2 - sizeof(mach_header_64_t))
544	return VERR_BAD_EXE_FORMAT;
545
546	/* Do we need to read a 2nd page to get all the load commands? If so, do it. */
547	if (uBuf.Hdr32.sizeofcmds + (f64Bit ? sizeof(mach_header_64_t) : sizeof(mach_header_32_t)) > X86_PAGE_4K_SIZE)
548	{
549	rc = pVMM->pfnDBGFR3MemRead(pUVM, 0 /idCpu/, pVMM->pfnDBGFR3AddrFromFlat(pUVM, &ModAddr, uModAddr + X86_PAGE_4K_SIZE),
550	&uBuf.ab[X86_PAGE_4K_SIZE], X86_PAGE_4K_SIZE);
551	if (RT_FAILURE(rc))
552	return rc;
553	}
554
555	/*
556	* Process the load commands.
557	*/
558	RTUUID Uuid = RTUUID_INITIALIZE_NULL;
559	RTDBGSEGMENT aSegs[24];
560	uint32_t cSegs = 0;
561	bool fHasLinkEdit = false;
562	uint32_t cLeft = uBuf.Hdr32.ncmds;
563	uint32_t cbLeft = uBuf.Hdr32.sizeofcmds;
564	union
565	{
566	uint8_t const *pb;
567	load_command_t const *pGenric;
568	segment_command_32_t const *pSeg32;
569	segment_command_64_t const *pSeg64;
570	uuid_command_t const *pUuid;
571	} uLCmd;
572	uLCmd.pb = &uBuf.ab[f64Bit ? sizeof(mach_header_64_t) : sizeof(mach_header_32_t)];
573
574	while (cLeft-- > 0)
575	{
576	uint32_t const cbCmd = uLCmd.pGenric->cmdsize;
577	if (cbCmd > cbLeft \|\| cbCmd < sizeof(load_command_t))
578	return VERR_BAD_EXE_FORMAT;
579
580	switch (uLCmd.pGenric->cmd)
581	{
582	case LC_SEGMENT_32:
583	if (cbCmd != sizeof(segment_command_32_t) + uLCmd.pSeg32->nsects * sizeof(section_32_t))
584	return VERR_BAD_EXE_FORMAT;
585	if (!dbgDiggerDarwinIsValidSegOrSectName(uLCmd.pSeg32->segname, sizeof(uLCmd.pSeg32->segname)))
586	return VERR_INVALID_NAME;
587	if ( !strcmp(uLCmd.pSeg32->segname, "__LINKEDIT")
588	&& !(fHasLinkEdit = dbgDiggerDarwinIsSegmentPresent(pUVM, pVMM, uLCmd.pSeg32->vmaddr, uLCmd.pSeg32->vmsize,
589	uModAddr, uModAddr + _64M)))
590	break; /* This usually is discarded or not loaded at all. */
591	if (cSegs >= RT_ELEMENTS(aSegs))
592	return VERR_BUFFER_OVERFLOW;
593	aSegs[cSegs].Address = uLCmd.pSeg32->vmaddr;
594	aSegs[cSegs].uRva = uLCmd.pSeg32->vmaddr - uModAddr;
595	aSegs[cSegs].cb = uLCmd.pSeg32->vmsize;
596	aSegs[cSegs].fFlags = uLCmd.pSeg32->flags; /* Abusing the flags field here... */
597	aSegs[cSegs].iSeg = cSegs;
598	AssertCompile(RTDBG_SEGMENT_NAME_LENGTH > sizeof(uLCmd.pSeg32->segname));
599	strcpy(aSegs[cSegs].szName, uLCmd.pSeg32->segname);
600	cSegs++;
601	break;
602
603	case LC_SEGMENT_64:
604	if (cbCmd != sizeof(segment_command_64_t) + uLCmd.pSeg64->nsects * sizeof(section_64_t))
605	return VERR_BAD_EXE_FORMAT;
606	if (!dbgDiggerDarwinIsValidSegOrSectName(uLCmd.pSeg64->segname, sizeof(uLCmd.pSeg64->segname)))
607	return VERR_INVALID_NAME;
608	if ( !strcmp(uLCmd.pSeg64->segname, "__LINKEDIT")
609	&& !(fHasLinkEdit = dbgDiggerDarwinIsSegmentPresent(pUVM, pVMM, uLCmd.pSeg64->vmaddr, uLCmd.pSeg64->vmsize,
610	uModAddr, uModAddr + _128M)))
611	break; /* This usually is discarded or not loaded at all. */
612	if (cSegs >= RT_ELEMENTS(aSegs))
613	return VERR_BUFFER_OVERFLOW;
614	aSegs[cSegs].Address = uLCmd.pSeg64->vmaddr;
615	aSegs[cSegs].uRva = uLCmd.pSeg64->vmaddr - uModAddr;
616	aSegs[cSegs].cb = uLCmd.pSeg64->vmsize;
617	aSegs[cSegs].fFlags = uLCmd.pSeg64->flags; /* Abusing the flags field here... */
618	aSegs[cSegs].iSeg = cSegs;
619	AssertCompile(RTDBG_SEGMENT_NAME_LENGTH > sizeof(uLCmd.pSeg64->segname));
620	strcpy(aSegs[cSegs].szName, uLCmd.pSeg64->segname);
621	cSegs++;
622	break;
623
624	case LC_UUID:
625	if (cbCmd != sizeof(uuid_command_t))
626	return VERR_BAD_EXE_FORMAT;
627	if (RTUuidIsNull((PCRTUUID)&uLCmd.pUuid->uuid[0]))
628	return VERR_BAD_EXE_FORMAT;
629	memcpy(&Uuid, &uLCmd.pUuid->uuid[0], sizeof(uLCmd.pUuid->uuid));
630	break;
631
632	default:
633	/* Current known max plus a lot of slack. */
634	if (uLCmd.pGenric->cmd > LC_DYLIB_CODE_SIGN_DRS + 32)
635	return VERR_BAD_EXE_FORMAT;
636	break;
637	}
638
639	/* next */
640	cbLeft -= cbCmd;
641	uLCmd.pb += cbCmd;
642	}
643
644	if (cbLeft != 0)
645	{
646	LogRel(("OSXDig: uModAddr=%#RX64 - %u bytes of command left over!\n", uModAddr, cbLeft));
647	return VERR_BAD_EXE_FORMAT;
648	}
649
650	/*
651	* Some post processing checks.
652	*/
653	uint32_t iSeg;
654	for (iSeg = 0; iSeg < cSegs; iSeg++)
655	if (aSegs[iSeg].Address == uModAddr)
656	break;
657	if (iSeg >= cSegs)
658	{
659	LogRel2(("OSXDig: uModAddr=%#RX64 was not found among the segments segments\n", uModAddr));
660	return VERR_ADDRESS_CONFLICT;
661	}
662
663	/*
664	* Create a debug module.
665	*/
666	RTDBGMOD hMod;
667	rc = RTDbgModCreateFromMachOImage(&hMod, pszName, NULL, f64Bit ? RTLDRARCH_AMD64 : RTLDRARCH_X86_32, NULL /phLdrModIn/,
668	0 /cbImage/, cSegs, aSegs, &Uuid, pVMM->pfnDBGFR3AsGetConfig(pUVM),
669	RTDBGMOD_F_NOT_DEFERRED \| (fHasLinkEdit ? RTDBGMOD_F_MACHO_LOAD_LINKEDIT : 0));
670
671
672	/*
673	* If module creation failed and we've got a linkedit segment, try open the
674	* image in-memory, because that will at a minimum give us symbol table symbols.
675	*/
676	if (RT_FAILURE(rc) && fHasLinkEdit)
677	{
678	DBGFADDRESS DbgfAddr;
679	RTERRINFOSTATIC ErrInfo;
680	rc = pVMM->pfnDBGFR3ModInMem(pUVM, pVMM->pfnDBGFR3AddrFromFlat(pUVM, &DbgfAddr, uModAddr),
681	DBGFMODINMEM_F_NO_CONTAINER_FALLBACK,
682	pszName, NULL /pszFilename/, f64Bit ? RTLDRARCH_AMD64 : RTLDRARCH_X86_32, 0 /cbImage /,
683	&hMod, RTErrInfoInitStatic(&ErrInfo));
684	if (RT_FAILURE(rc))
685	LogRel(("OSXDig: Failed to do an in-memory-opening of '%s' at %#RX64: %Rrc%s%s\n", pszName, uModAddr, rc,
686	RTErrInfoIsSet(&ErrInfo.Core) ? " - " : "", RTErrInfoIsSet(&ErrInfo.Core) ? ErrInfo.Core.pszMsg : ""));
687	}
688
689	/*
690	* Final fallback is a container module.
691	*/
692	if (RT_FAILURE(rc))
693	{
694	rc = RTDbgModCreate(&hMod, pszName, 0, 0);
695	if (RT_FAILURE(rc))
696	return rc;
697
698	uint64_t uRvaNext = 0;
699	for (iSeg = 0; iSeg < cSegs && RT_SUCCESS(rc); iSeg++)
700	{
701	if ( aSegs[iSeg].uRva > uRvaNext
702	&& aSegs[iSeg].uRva - uRvaNext < _1M)
703	uRvaNext = aSegs[iSeg].uRva;
704	rc = RTDbgModSegmentAdd(hMod, aSegs[iSeg].uRva, aSegs[iSeg].cb, aSegs[iSeg].szName, 0, NULL);
705	if (aSegs[iSeg].cb > 0 && RT_SUCCESS(rc))
706	{
707	char szTmp[RTDBG_SEGMENT_NAME_LENGTH + sizeof("_start")];
708	strcat(strcpy(szTmp, aSegs[iSeg].szName), "_start");
709	rc = RTDbgModSymbolAdd(hMod, szTmp, iSeg, 0 /uRva/, 0 /cb/, 0 /fFlags/, NULL);
710	}
711	uRvaNext += aSegs[iSeg].cb;
712	}
713
714	if (RT_FAILURE(rc))
715	{
716	RTDbgModRelease(hMod);
717	return rc;
718	}
719	}
720
721	/* Tag the module. */
722	rc = RTDbgModSetTag(hMod, DIG_DARWIN_MOD_TAG);
723	AssertRC(rc);
724
725	/*
726	* Link the module.
727	*/
728	RTDBGAS hAs = pVMM->pfnDBGFR3AsResolveAndRetain(pUVM, DBGF_AS_KERNEL);
729	if (hAs != NIL_RTDBGAS)
730	{
731	//uint64_t uRvaNext = 0; - what was this?
732	uint32_t cLinked = 0;
733	iSeg = cSegs;
734	while (iSeg-- > 0) /* HACK: Map in reverse order to avoid replacing __TEXT. */
735	if (aSegs[iSeg].cb)
736	{
737	/* Find matching segment in the debug module. */
738	uint32_t iDbgSeg = 0;
739	while (iDbgSeg < cSegs)
740	{
741	RTDBGSEGMENT SegInfo;
742	int rc3 = RTDbgModSegmentByIndex(hMod, iDbgSeg, &SegInfo);
743	if (RT_SUCCESS(rc3) && !strcmp(SegInfo.szName, aSegs[iSeg].szName))
744	break;
745	iDbgSeg++;
746	}
747	AssertMsgStmt(iDbgSeg < cSegs, ("%s\n", aSegs[iSeg].szName), continue);
748
749	/* Map it. */
750	int rc2 = RTDbgAsModuleLinkSeg(hAs, hMod, iDbgSeg, aSegs[iSeg].Address, RTDBGASLINK_FLAGS_REPLACE /fFlags/);
751	if (RT_SUCCESS(rc2))
752	cLinked++;
753	else if (RT_SUCCESS(rc))
754	rc = rc2;
755	}
756	if (RT_FAILURE(rc) && cLinked != 0)
757	rc = -rc;
758	}
759	else
760	rc = VERR_INTERNAL_ERROR;
761
762	RTDbgModRelease(hMod);
763	RTDbgAsRelease(hAs);
764
765	if (pf64Bit)
766	*pf64Bit = f64Bit;
767	return rc;
768	}
769
770
771	static bool dbgDiggerDarwinIsValidName(const char *pszName)
772	{
773	char ch;
774	while ((ch = *pszName++) != '\0')
775	{
776	if (ch < 0x20 \|\| ch >= 127)
777	return false;
778	}
779	return true;
780	}
781
782
783	static bool dbgDiggerDarwinIsValidVersion(const char *pszVersion)
784	{
785	char ch;
786	while ((ch = *pszVersion++) != '\0')
787	{
788	if (ch < 0x20 \|\| ch >= 127)
789	return false;
790	}
791	return true;
792	}
793
794
795	/**
796	* @copydoc DBGFOSREG::pfnInit
797	*/
798	static DECLCALLBACK(int) dbgDiggerDarwinInit(PUVM pUVM, PCVMMR3VTABLE pVMM, void *pvData)
799	{
800	PDBGDIGGERDARWIN pThis = (PDBGDIGGERDARWIN)pvData;
801	Assert(!pThis->fValid);
802
803	/*
804	* Add the kernel module.
805	*/
806	bool f64Bit;
807	int rc = dbgDiggerDarwinAddModule(pThis, pUVM, pVMM, pThis->AddrKernel.FlatPtr, "mach_kernel", &f64Bit);
808	if (RT_SUCCESS(rc))
809	{
810	/*
811	* The list of modules can be found at the 'kmod' symbol, that means
812	* that we currently require some kind of symbol file for the kernel
813	* to be loaded at this point.
814	*
815	* Note! Could also use the 'gLoadedKextSummaries', but I don't think
816	* it's any easier to find without any kernel map than 'kmod'.
817	*/
818	RTDBGSYMBOL SymInfo;
819	rc = pVMM->pfnDBGFR3AsSymbolByName(pUVM, DBGF_AS_KERNEL, "mach_kernel!kmod", &SymInfo, NULL);
820	if (RT_FAILURE(rc))
821	rc = pVMM->pfnDBGFR3AsSymbolByName(pUVM, DBGF_AS_KERNEL, "mach_kernel!_kmod", &SymInfo, NULL);
822	if (RT_SUCCESS(rc))
823	{
824	DBGFADDRESS AddrModInfo;
825	pVMM->pfnDBGFR3AddrFromFlat(pUVM, &AddrModInfo, SymInfo.Value);
826
827	/* Read the variable. */
828	RTUINT64U uKmodValue = { 0 };
829	if (f64Bit)
830	rc = pVMM->pfnDBGFR3MemRead(pUVM, 0 /idCpu/, &AddrModInfo, &uKmodValue.u, sizeof(uKmodValue.u));
831	else
832	rc = pVMM->pfnDBGFR3MemRead (pUVM, 0 /idCpu/, &AddrModInfo, &uKmodValue.s.Lo, sizeof(uKmodValue.s.Lo));
833	if (RT_SUCCESS(rc))
834	{
835	pVMM->pfnDBGFR3AddrFromFlat(pUVM, &AddrModInfo, uKmodValue.u);
836
837	/* Walk the list of modules. */
838	uint32_t cIterations = 0;
839	while (AddrModInfo.FlatPtr != 0)
840	{
841	/* Some extra loop conditions... */
842	if (!OSX_VALID_ADDRESS(f64Bit, AddrModInfo.FlatPtr))
843	{
844	LogRel(("OSXDig: Invalid kmod_info pointer: %RGv\n", AddrModInfo.FlatPtr));
845	break;
846	}
847	if (AddrModInfo.FlatPtr == uKmodValue.u && cIterations != 0)
848	{
849	LogRel(("OSXDig: kmod_info list looped back to the start.\n"));
850	break;
851	}
852	if (cIterations++ >= 2048)
853	{
854	LogRel(("OSXDig: Too many mod_info loops (%u)\n", cIterations));
855	break;
856	}
857
858	/*
859	* Read the kmod_info_t structure.
860	*/
861	union
862	{
863	OSX64_kmod_info_t Info64;
864	OSX32_kmod_info_t Info32;
865	} uMod;
866	RT_ZERO(uMod);
867	rc = pVMM->pfnDBGFR3MemRead(pUVM, 0 /idCpu/, &AddrModInfo, &uMod,
868	f64Bit ? sizeof(uMod.Info64) : sizeof(uMod.Info32));
869	if (RT_FAILURE(rc))
870	{
871	LogRel(("OSXDig: Error reading kmod_info structure at %RGv: %Rrc\n", AddrModInfo.FlatPtr, rc));
872	break;
873	}
874
875	/*
876	* Validate the kmod_info_t structure.
877	*/
878	int32_t iInfoVer = f64Bit ? uMod.Info64.info_version : uMod.Info32.info_version;
879	if (iInfoVer != OSX_KMOD_INFO_VERSION)
880	{
881	LogRel(("OSXDig: kmod_info @%RGv: Bad info_version %d\n", AddrModInfo.FlatPtr, iInfoVer));
882	break;
883	}
884
885	const char *pszName = f64Bit ? uMod.Info64.name : uMod.Info32.name;
886	if ( !*pszName
887	\|\| !RTStrEnd(pszName, sizeof(uMod.Info64.name))
888	\|\| !dbgDiggerDarwinIsValidName(pszName) )
889	{
890	LogRel(("OSXDig: kmod_info @%RGv: Bad name '%.*s'\n", AddrModInfo.FlatPtr,
891	sizeof(uMod.Info64.name), pszName));
892	break;
893	}
894
895	const char *pszVersion = f64Bit ? uMod.Info64.version : uMod.Info32.version;
896	if ( !RTStrEnd(pszVersion, sizeof(uMod.Info64.version))
897	\|\| !dbgDiggerDarwinIsValidVersion(pszVersion) )
898	{
899	LogRel(("OSXDig: kmod_info @%RGv: Bad version '%.*s'\n", AddrModInfo.FlatPtr,
900	sizeof(uMod.Info64.version), pszVersion));
901	break;
902	}
903
904	int32_t cRefs = f64Bit ? uMod.Info64.reference_count : uMod.Info32.reference_count;
905	if (cRefs < -1 \|\| cRefs > 16384)
906	{
907	LogRel(("OSXDig: kmod_info @%RGv: Bad reference_count %d\n", AddrModInfo.FlatPtr, cRefs));
908	break;
909	}
910
911	uint64_t uImageAddr = f64Bit ? uMod.Info64.address : uMod.Info32.address;
912	if (!OSX_VALID_ADDRESS(f64Bit, uImageAddr))
913	{
914	LogRel(("OSXDig: kmod_info @%RGv: Bad address %#llx\n", AddrModInfo.FlatPtr, uImageAddr));
915	break;
916	}
917
918	uint64_t cbImage = f64Bit ? uMod.Info64.size : uMod.Info32.size;
919	if (cbImage > 64U*_1M)
920	{
921	LogRel(("OSXDig: kmod_info @%RGv: Bad size %#llx\n", AddrModInfo.FlatPtr, cbImage));
922	break;
923	}
924
925	uint64_t cbHdr = f64Bit ? uMod.Info64.hdr_size : uMod.Info32.hdr_size;
926	if (cbHdr > 16U*_1M)
927	{
928	LogRel(("OSXDig: kmod_info @%RGv: Bad hdr_size %#llx\n", AddrModInfo.FlatPtr, cbHdr));
929	break;
930	}
931
932	uint64_t uStartAddr = f64Bit ? uMod.Info64.start : uMod.Info32.start;
933	if (!uStartAddr && !OSX_VALID_ADDRESS(f64Bit, uStartAddr))
934	{
935	LogRel(("OSXDig: kmod_info @%RGv: Bad start function %#llx\n", AddrModInfo.FlatPtr, uStartAddr));
936	break;
937	}
938
939	uint64_t uStopAddr = f64Bit ? uMod.Info64.stop : uMod.Info32.stop;
940	if (!uStopAddr && !OSX_VALID_ADDRESS(f64Bit, uStopAddr))
941	{
942	LogRel(("OSXDig: kmod_info @%RGv: Bad stop function %#llx\n", AddrModInfo.FlatPtr, uStopAddr));
943	break;
944	}
945
946	/*
947	* Try add the module.
948	*/
949	LogRel(("OSXDig: kmod_info @%RGv: '%s' ver '%s', image @%#llx LB %#llx cbHdr=%#llx\n", AddrModInfo.FlatPtr,
950	pszName, pszVersion, uImageAddr, cbImage, cbHdr));
951	rc = dbgDiggerDarwinAddModule(pThis, pUVM, pVMM, uImageAddr, pszName, NULL);
952
953
954	/*
955	* Advance to the next kmod_info entry.
956	*/
957	pVMM->pfnDBGFR3AddrFromFlat(pUVM, &AddrModInfo, f64Bit ? uMod.Info64.next : uMod.Info32.next);
958	}
959	}
960	else
961	LogRel(("OSXDig: Error reading the 'kmod' variable: %Rrc\n", rc));
962	}
963	else
964	LogRel(("OSXDig: Failed to locate the 'kmod' variable in mach_kernel.\n"));
965
966	pThis->fValid = true;
967	return VINF_SUCCESS;
968	}
969
970	return rc;
971	}
972
973
974	/**
975	* @copydoc DBGFOSREG::pfnProbe
976	*/
977	static DECLCALLBACK(bool) dbgDiggerDarwinProbe(PUVM pUVM, PCVMMR3VTABLE pVMM, void *pvData)
978	{
979	PDBGDIGGERDARWIN pThis = (PDBGDIGGERDARWIN)pvData;
980
981	/*
982	* Look for a section + segment combo that normally only occures in
983	* mach_kernel. Follow it up with probing of the rest of the executable
984	* header. We must search a largish area because the more recent versions
985	* of darwin have random load address for security raisins.
986	*/
987	static struct { uint64_t uStart, uEnd; } const s_aRanges[] =
988	{
989	/* 64-bit: */
990	{ UINT64_C(0xffffff8000000000), UINT64_C(0xffffff81ffffffff), },
991
992	/* 32-bit - always search for this because of the hybrid 32-bit kernel
993	with cpu in long mode that darwin used for a number of versions. */
994	{ UINT64_C(0x00001000), UINT64_C(0x0ffff000), }
995	};
996	for (unsigned iRange = pVMM->pfnDBGFR3CpuGetMode(pUVM, 0 /idCpu/) != CPUMMODE_LONG;
997	iRange < RT_ELEMENTS(s_aRanges);
998	iRange++)
999	{
1000	DBGFADDRESS KernelAddr;
1001	for (pVMM->pfnDBGFR3AddrFromFlat(pUVM, &KernelAddr, s_aRanges[iRange].uStart);
1002	KernelAddr.FlatPtr < s_aRanges[iRange].uEnd;
1003	KernelAddr.FlatPtr += X86_PAGE_4K_SIZE)
1004	{
1005	static const uint8_t s_abNeedle[16 + 16] =
1006	{
1007	'_','_','t','e','x','t', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* section_32_t::sectname */
1008	'_','_','K','L','D', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* section_32_t::segname. */
1009	};
1010
1011	int rc = pVMM->pfnDBGFR3MemScan(pUVM, 0 /idCpu/, &KernelAddr, s_aRanges[iRange].uEnd - KernelAddr.FlatPtr,
1012	1, s_abNeedle, sizeof(s_abNeedle), &KernelAddr);
1013	if (RT_FAILURE(rc))
1014	break;
1015	pVMM->pfnDBGFR3AddrSub(&KernelAddr, KernelAddr.FlatPtr & X86_PAGE_4K_OFFSET_MASK);
1016
1017	/*
1018	* Read the first page of the image and check the headers.
1019	*/
1020	union
1021	{
1022	uint8_t ab[X86_PAGE_4K_SIZE];
1023	mach_header_64_t Hdr64;
1024	mach_header_32_t Hdr32;
1025	} uBuf;
1026	rc = pVMM->pfnDBGFR3MemRead(pUVM, 0 /idCpu/, &KernelAddr, uBuf.ab, X86_PAGE_4K_SIZE);
1027	if (RT_FAILURE(rc))
1028	continue;
1029	AssertCompileMembersSameSizeAndOffset(mach_header_64_t, magic, mach_header_32_t, magic);
1030	if ( uBuf.Hdr64.magic != IMAGE_MACHO64_SIGNATURE
1031	&& uBuf.Hdr32.magic != IMAGE_MACHO32_SIGNATURE)
1032	continue;
1033	AssertCompileMembersSameSizeAndOffset(mach_header_64_t, cputype, mach_header_32_t, cputype);
1034	bool f64Bit = uBuf.Hdr64.magic == IMAGE_MACHO64_SIGNATURE;
1035	if (uBuf.Hdr32.cputype != (f64Bit ? CPU_TYPE_X86_64 : CPU_TYPE_I386))
1036	continue;
1037	AssertCompileMembersSameSizeAndOffset(mach_header_64_t, filetype, mach_header_32_t, filetype);
1038	if (uBuf.Hdr32.filetype != MH_EXECUTE)
1039	continue;
1040	AssertCompileMembersSameSizeAndOffset(mach_header_64_t, ncmds, mach_header_32_t, ncmds);
1041	if (uBuf.Hdr32.ncmds > 256)
1042	continue;
1043	AssertCompileMembersSameSizeAndOffset(mach_header_64_t, sizeofcmds, mach_header_32_t, sizeofcmds);
1044	if (uBuf.Hdr32.sizeofcmds > X86_PAGE_4K_SIZE * 2 - sizeof(mach_header_64_t))
1045	continue;
1046
1047	/* Seems good enough for now.
1048
1049	If the above causes false positives, check the segments and make
1050	sure there is a kernel version string in the right one. */
1051	pThis->AddrKernel = KernelAddr;
1052	pThis->f64Bit = f64Bit;
1053
1054	/*
1055	* Finally, find the kernel version string.
1056	*/
1057	rc = pVMM->pfnDBGFR3MemScan(pUVM, 0 /idCpu/, &KernelAddr, 32*_1M, 1, RT_STR_TUPLE("Darwin Kernel Version"),
1058	&pThis->AddrKernelVersion);
1059	if (RT_FAILURE(rc))
1060	pVMM->pfnDBGFR3AddrFromFlat(pUVM, &pThis->AddrKernelVersion, 0);
1061	return true;
1062	}
1063	}
1064	return false;
1065	}
1066
1067
1068	/**
1069	* @copydoc DBGFOSREG::pfnDestruct
1070	*/
1071	static DECLCALLBACK(void) dbgDiggerDarwinDestruct(PUVM pUVM, PCVMMR3VTABLE pVMM, void *pvData)
1072	{
1073	RT_NOREF(pUVM, pVMM, pvData);
1074	}
1075
1076
1077	/**
1078	* @copydoc DBGFOSREG::pfnConstruct
1079	*/
1080	static DECLCALLBACK(int) dbgDiggerDarwinConstruct(PUVM pUVM, PCVMMR3VTABLE pVMM, void *pvData)
1081	{
1082	RT_NOREF(pUVM, pVMM);
1083	PDBGDIGGERDARWIN pThis = (PDBGDIGGERDARWIN)pvData;
1084
1085	pThis->IDmesg.u32Magic = DBGFOSIDMESG_MAGIC;
1086	pThis->IDmesg.pfnQueryKernelLog = dbgDiggerDarwinIDmsg_QueryKernelLog;
1087	pThis->IDmesg.u32EndMagic = DBGFOSIDMESG_MAGIC;
1088
1089	return VINF_SUCCESS;
1090	}
1091
1092
1093	const DBGFOSREG g_DBGDiggerDarwin =
1094	{
1095	/* .u32Magic = */ DBGFOSREG_MAGIC,
1096	/* .fFlags = */ 0,
1097	/* .cbData = */ sizeof(DBGDIGGERDARWIN),
1098	/* .szName = */ "Darwin",
1099	/* .pfnConstruct = */ dbgDiggerDarwinConstruct,
1100	/* .pfnDestruct = */ dbgDiggerDarwinDestruct,
1101	/* .pfnProbe = */ dbgDiggerDarwinProbe,
1102	/* .pfnInit = */ dbgDiggerDarwinInit,
1103	/* .pfnRefresh = */ dbgDiggerDarwinRefresh,
1104	/* .pfnTerm = */ dbgDiggerDarwinTerm,
1105	/* .pfnQueryVersion = */ dbgDiggerDarwinQueryVersion,
1106	/* .pfnQueryInterface = */ dbgDiggerDarwinQueryInterface,
1107	/* .pfnStackUnwindAssist = */ dbgDiggerDarwinStackUnwindAssist,
1108	/* .u32EndMagic = */ DBGFOSREG_MAGIC
1109	};
1110

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source: vbox/trunk/src/VBox/Debugger/DBGPlugInDarwin.cpp@ 95638

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