VirtualBox

source: vbox/trunk/src/VBox/Debugger/DBGPlugInOS2.cpp@ 67981

Last change on this file since 67981 was 63567, checked in by vboxsync, 8 years ago

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1/* $Id: DBGPlugInOS2.cpp 63567 2016-08-16 14:06:54Z vboxsync $ */
2/** @file
3 * DBGPlugInOS2 - Debugger and Guest OS Digger Plugin For OS/2.
4 */
5
6/*
7 * Copyright (C) 2009-2016 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/dbgf.h>
25#include <VBox/err.h>
26#include <VBox/param.h>
27#include <iprt/string.h>
28#include <iprt/mem.h>
29#include <iprt/stream.h>
30
31
32/*********************************************************************************************************************************
33* Structures and Typedefs *
34*********************************************************************************************************************************/
35
36/** @name Internal OS/2 structures */
37
38/** @} */
39
40
41typedef enum DBGDIGGEROS2VER
42{
43 DBGDIGGEROS2VER_UNKNOWN,
44 DBGDIGGEROS2VER_1_x,
45 DBGDIGGEROS2VER_2_x,
46 DBGDIGGEROS2VER_3_0,
47 DBGDIGGEROS2VER_4_0,
48 DBGDIGGEROS2VER_4_5
49} DBGDIGGEROS2VER;
50
51/**
52 * OS/2 guest OS digger instance data.
53 */
54typedef struct DBGDIGGEROS2
55{
56 /** Whether the information is valid or not.
57 * (For fending off illegal interface method calls.) */
58 bool fValid;
59 /** 32-bit (true) or 16-bit (false) */
60 bool f32Bit;
61
62 /** The OS/2 guest version. */
63 DBGDIGGEROS2VER enmVer;
64 uint8_t OS2MajorVersion;
65 uint8_t OS2MinorVersion;
66
67 /** Guest's Global Info Segment selector. */
68 uint16_t selGIS;
69
70} DBGDIGGEROS2;
71/** Pointer to the OS/2 guest OS digger instance data. */
72typedef DBGDIGGEROS2 *PDBGDIGGEROS2;
73
74
75/*********************************************************************************************************************************
76* Defined Constants And Macros *
77*********************************************************************************************************************************/
78/** The 'SAS ' signature. */
79#define DIG_OS2_SAS_SIG RT_MAKE_U32_FROM_U8('S','A','S',' ')
80
81/** OS/2Warp on little endian ASCII systems. */
82#define DIG_OS2_MOD_TAG UINT64_C(0x43532f3257617270)
83
84
85/*********************************************************************************************************************************
86* Internal Functions *
87*********************************************************************************************************************************/
88static DECLCALLBACK(int) dbgDiggerOS2Init(PUVM pUVM, void *pvData);
89
90
91
92#if 0 /* unused */
93/**
94 * Process a PE image found in guest memory.
95 *
96 * @param pThis The instance data.
97 * @param pUVM The user mode VM handle.
98 * @param pszName The image name.
99 * @param pImageAddr The image address.
100 * @param cbImage The size of the image.
101 * @param pbBuf Scratch buffer containing the first
102 * RT_MIN(cbBuf, cbImage) bytes of the image.
103 * @param cbBuf The scratch buffer size.
104 */
105static void dbgDiggerOS2ProcessImage(PDBGDIGGEROS2 pThis, PUVM pUVM, const char *pszName,
106 PCDBGFADDRESS pImageAddr, uint32_t cbImage,
107 uint8_t *pbBuf, size_t cbBuf)
108{
109 RT_NOREF7(pThis, pUVM, pszName, pImageAddr, cbImage, pbBuf, cbBuf);
110 LogFlow(("DigOS2: %RGp %#x %s\n", pImageAddr->FlatPtr, cbImage, pszName));
111
112 /* To be implemented.*/
113}
114#endif
115
116
117/**
118 * @copydoc DBGFOSREG::pfnQueryInterface
119 */
120static DECLCALLBACK(void *) dbgDiggerOS2QueryInterface(PUVM pUVM, void *pvData, DBGFOSINTERFACE enmIf)
121{
122 RT_NOREF3(pUVM, pvData, enmIf);
123 return NULL;
124}
125
126
127/**
128 * @copydoc DBGFOSREG::pfnQueryVersion
129 */
130static DECLCALLBACK(int) dbgDiggerOS2QueryVersion(PUVM pUVM, void *pvData, char *pszVersion, size_t cchVersion)
131{
132 RT_NOREF1(pUVM);
133 PDBGDIGGEROS2 pThis = (PDBGDIGGEROS2)pvData;
134 Assert(pThis->fValid);
135 char *achOS2ProductType[32];
136 char *pszOS2ProductType = (char *)achOS2ProductType;
137
138 if (pThis->OS2MajorVersion == 10)
139 {
140 RTStrPrintf(pszOS2ProductType, sizeof(achOS2ProductType), "OS/2 1.%02d", pThis->OS2MinorVersion);
141 pThis->enmVer = DBGDIGGEROS2VER_1_x;
142 }
143 else if (pThis->OS2MajorVersion == 20)
144 {
145 if (pThis->OS2MinorVersion < 30)
146 {
147 RTStrPrintf(pszOS2ProductType, sizeof(achOS2ProductType), "OS/2 2.%02d", pThis->OS2MinorVersion);
148 pThis->enmVer = DBGDIGGEROS2VER_2_x;
149 }
150 else if (pThis->OS2MinorVersion < 40)
151 {
152 RTStrPrintf(pszOS2ProductType, sizeof(achOS2ProductType), "OS/2 Warp");
153 pThis->enmVer = DBGDIGGEROS2VER_3_0;
154 }
155 else if (pThis->OS2MinorVersion == 40)
156 {
157 RTStrPrintf(pszOS2ProductType, sizeof(achOS2ProductType), "OS/2 Warp 4");
158 pThis->enmVer = DBGDIGGEROS2VER_4_0;
159 }
160 else
161 {
162 RTStrPrintf(pszOS2ProductType, sizeof(achOS2ProductType), "OS/2 Warp %d.%d",
163 pThis->OS2MinorVersion / 10, pThis->OS2MinorVersion % 10);
164 pThis->enmVer = DBGDIGGEROS2VER_4_5;
165 }
166 }
167 RTStrPrintf(pszVersion, cchVersion, "%u.%u (%s)", pThis->OS2MajorVersion, pThis->OS2MinorVersion, pszOS2ProductType);
168 return VINF_SUCCESS;
169}
170
171
172/**
173 * @copydoc DBGFOSREG::pfnTerm
174 */
175static DECLCALLBACK(void) dbgDiggerOS2Term(PUVM pUVM, void *pvData)
176{
177 RT_NOREF1(pUVM);
178 PDBGDIGGEROS2 pThis = (PDBGDIGGEROS2)pvData;
179 Assert(pThis->fValid);
180
181 pThis->fValid = false;
182}
183
184
185/**
186 * @copydoc DBGFOSREG::pfnRefresh
187 */
188static DECLCALLBACK(int) dbgDiggerOS2Refresh(PUVM pUVM, void *pvData)
189{
190 PDBGDIGGEROS2 pThis = (PDBGDIGGEROS2)pvData;
191 NOREF(pThis);
192 Assert(pThis->fValid);
193
194 /*
195 * For now we'll flush and reload everything.
196 */
197 RTDBGAS hDbgAs = DBGFR3AsResolveAndRetain(pUVM, DBGF_AS_KERNEL);
198 if (hDbgAs != NIL_RTDBGAS)
199 {
200 uint32_t iMod = RTDbgAsModuleCount(hDbgAs);
201 while (iMod-- > 0)
202 {
203 RTDBGMOD hMod = RTDbgAsModuleByIndex(hDbgAs, iMod);
204 if (hMod != NIL_RTDBGMOD)
205 {
206 if (RTDbgModGetTag(hMod) == DIG_OS2_MOD_TAG)
207 {
208 int rc = RTDbgAsModuleUnlink(hDbgAs, hMod);
209 AssertRC(rc);
210 }
211 RTDbgModRelease(hMod);
212 }
213 }
214 RTDbgAsRelease(hDbgAs);
215 }
216
217 dbgDiggerOS2Term(pUVM, pvData);
218 return dbgDiggerOS2Init(pUVM, pvData);
219}
220
221
222/**
223 * @copydoc DBGFOSREG::pfnInit
224 */
225static DECLCALLBACK(int) dbgDiggerOS2Init(PUVM pUVM, void *pvData)
226{
227 PDBGDIGGEROS2 pThis = (PDBGDIGGEROS2)pvData;
228 Assert(!pThis->fValid);
229
230 union
231 {
232 uint8_t au8[0x2000];
233 uint16_t au16[0x2000/2];
234 uint32_t au32[0x2000/4];
235 RTUTF16 wsz[0x2000/2];
236 } u;
237 DBGFADDRESS Addr;
238 int rc;
239
240 /*
241 * Determine the OS/2 version.
242 */
243 do {
244 /* Version info is at GIS:15h (major/minor/revision). */
245 rc = DBGFR3AddrFromSelOff(pUVM, 0 /*idCpu*/, &Addr, pThis->selGIS, 0x15);
246 if (RT_FAILURE(rc))
247 break;
248 rc = DBGFR3MemRead(pUVM, 0 /*idCpu*/, &Addr, u.au32, sizeof(uint32_t));
249 if (RT_FAILURE(rc))
250 break;
251
252 pThis->OS2MajorVersion = u.au8[0];
253 pThis->OS2MinorVersion = u.au8[1];
254
255 pThis->fValid = true;
256 return VINF_SUCCESS;
257 } while (0);
258 return VERR_NOT_SUPPORTED;
259}
260
261
262/**
263 * @copydoc DBGFOSREG::pfnProbe
264 */
265static DECLCALLBACK(bool) dbgDiggerOS2Probe(PUVM pUVM, void *pvData)
266{
267 PDBGDIGGEROS2 pThis = (PDBGDIGGEROS2)pvData;
268 DBGFADDRESS Addr;
269 int rc;
270 uint16_t offInfo;
271 union
272 {
273 uint8_t au8[8192];
274 uint16_t au16[8192/2];
275 uint32_t au32[8192/4];
276 RTUTF16 wsz[8192/2];
277 } u;
278
279 /*
280 * If the DWORD at 70:0 contains 'SAS ' it's quite unlikely that this wouldn't be OS/2.
281 * Note: The SAS layout is similar between 16-bit and 32-bit OS/2, but not identical.
282 * 32-bit OS/2 will have the flat kernel data selector at SAS:06. The selector is 168h
283 * or similar. For 16-bit OS/2 the field contains a table offset into the SAS which will
284 * be much smaller. Fun fact: The global infoseg selector in the SAS is bimodal in 16-bit
285 * OS/2 and will work in real mode as well.
286 */
287 do {
288 rc = DBGFR3AddrFromSelOff(pUVM, 0 /*idCpu*/, &Addr, 0x70, 0x00);
289 if (RT_FAILURE(rc))
290 break;
291 rc = DBGFR3MemRead(pUVM, 0 /*idCpu*/, &Addr, u.au32, 256);
292 if (RT_FAILURE(rc))
293 break;
294 if (u.au32[0] != DIG_OS2_SAS_SIG)
295 break;
296
297 /* This sure looks like OS/2, but a bit of paranoia won't hurt. */
298 if (u.au16[2] >= u.au16[4])
299 break;
300
301 /* If 4th word is bigger than 5th, it's the flat kernel mode selector. */
302 if (u.au16[3] > u.au16[4])
303 pThis->f32Bit = true;
304
305 /* Offset into info table is either at SAS:14h or SAS:16h. */
306 if (pThis->f32Bit)
307 offInfo = u.au16[0x14/2];
308 else
309 offInfo = u.au16[0x16/2];
310
311 /* The global infoseg selector is the first entry in the info table. */
312 pThis->selGIS = u.au16[offInfo/2];
313 return true;
314 } while (0);
315
316 return false;
317}
318
319
320/**
321 * @copydoc DBGFOSREG::pfnDestruct
322 */
323static DECLCALLBACK(void) dbgDiggerOS2Destruct(PUVM pUVM, void *pvData)
324{
325 RT_NOREF2(pUVM, pvData);
326}
327
328
329/**
330 * @copydoc DBGFOSREG::pfnConstruct
331 */
332static DECLCALLBACK(int) dbgDiggerOS2Construct(PUVM pUVM, void *pvData)
333{
334 RT_NOREF1(pUVM);
335 PDBGDIGGEROS2 pThis = (PDBGDIGGEROS2)pvData;
336 pThis->fValid = false;
337 pThis->f32Bit = false;
338 pThis->enmVer = DBGDIGGEROS2VER_UNKNOWN;
339 return VINF_SUCCESS;
340}
341
342
343const DBGFOSREG g_DBGDiggerOS2 =
344{
345 /* .u32Magic = */ DBGFOSREG_MAGIC,
346 /* .fFlags = */ 0,
347 /* .cbData = */ sizeof(DBGDIGGEROS2),
348 /* .szName = */ "OS/2",
349 /* .pfnConstruct = */ dbgDiggerOS2Construct,
350 /* .pfnDestruct = */ dbgDiggerOS2Destruct,
351 /* .pfnProbe = */ dbgDiggerOS2Probe,
352 /* .pfnInit = */ dbgDiggerOS2Init,
353 /* .pfnRefresh = */ dbgDiggerOS2Refresh,
354 /* .pfnTerm = */ dbgDiggerOS2Term,
355 /* .pfnQueryVersion = */ dbgDiggerOS2QueryVersion,
356 /* .pfnQueryInterface = */ dbgDiggerOS2QueryInterface,
357 /* .u32EndMagic = */ DBGFOSREG_MAGIC
358};
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