1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
|
/////////////////////////////////////////////////////////////////////////
// $Id: iodebug.cc,v 1.15 2002/11/19 05:47:45 bdenney Exp $
/////////////////////////////////////////////////////////////////////////
//
#include "bochs.h"
#if BX_IODEBUG_SUPPORT
bx_iodebug_c bx_iodebug;
bx_iodebug_c *bx_iodebug_ptr;
struct bx_iodebug_s_type {
bx_bool enabled;
unsigned int register_select;
Bit32u registers[2];
Bit32u monitored_mem_areas_start[BX_IODEBUG_MAX_AREAS];
Bit32u monitored_mem_areas_end[BX_IODEBUG_MAX_AREAS];
} bx_iodebug_s;
// Constructor
bx_iodebug_c::bx_iodebug_c( void )
{
put("IODEBUG");
settype(IODEBUGLOG);
}
// Destructor
bx_iodebug_c::~bx_iodebug_c( void )
{
}
void bx_iodebug_c::init(void)
{
int i;
DEV_register_ioread_handler(this, read_handler, 0x8A00,"BOCHS IODEBUG", 7);
DEV_register_iowrite_handler(this, write_handler, 0x8A00,"BOCHS IODEBUG", 7);
DEV_register_iowrite_handler(this, write_handler, 0x8A01,"BOCHS IODEBUG", 7);
// fprintf( stderr, "IODEBUG initialized\n");
bx_iodebug_s.enabled = 0;
bx_iodebug_s.register_select = 0;
for(i=0;i<BX_IODEBUG_MAX_AREAS;i++) {
bx_iodebug_s.monitored_mem_areas_start[i] = 0;
bx_iodebug_s.monitored_mem_areas_end[i] = 0;
}
}
void bx_iodebug_c::reset(unsigned type)
{
}
Bit32u bx_iodebug_c::read_handler(void *this_ptr, Bit32u addr, unsigned io_len)
{
bx_iodebug_ptr = (bx_iodebug_c *) this_ptr;
return( bx_iodebug_ptr->read(addr, io_len) );
}
Bit32u bx_iodebug_c::read( Bit32u addr, unsigned io_len )
{
if(bx_iodebug_s.enabled) return(0x8A00);
return(0);
}
void bx_iodebug_c::write_handler(void *this_ptr, Bit32u addr, Bit32u dvalue, unsigned io_len)
{
bx_iodebug_c *class_ptr = (bx_iodebug_c *) this_ptr;
class_ptr->write( addr, dvalue, io_len );
}
void bx_iodebug_c::write( Bit32u addr, Bit32u dvalue, unsigned int io_len )
{
// fprintf(stderr, "IODEBUG addr: %4x\tdvalue: %8x\tio_len: %8x\n", (unsigned int)addr, (unsigned int)dvalue, io_len);
if( addr == 0x8A01 && io_len == 2 )
{
bx_iodebug_s.registers[bx_iodebug_s.register_select] =
(bx_iodebug_s.registers[bx_iodebug_s.register_select] << 16) +
(dvalue & 0x0000FFFF );
}
if( (addr != 0x8A00) || (io_len != 2) ) return;
if( !bx_iodebug_s.enabled )
{
if( dvalue == 0x8A00 )
{
bx_iodebug_s.enabled = 1;
// fprintf(stderr, "IODEBUG enabled\n");
bx_iodebug_s.registers[0] = 0;
bx_iodebug_s.registers[1] = 0;
}
return;
}
switch( dvalue )
{
case( 0x8A01 ):
bx_iodebug_s.register_select = 0;
// fprintf( stderr, "IODEBUG register 0 selected\n");
break;
case( 0x8A02 ):
bx_iodebug_s.register_select = 1;
// fprintf( stderr, "IODEBUG register 1 selected\n");
break;
case( 0x8A80 ):
bx_iodebug_s.register_select = 0;
bx_iodebug_c::add_range(
bx_iodebug_s.registers[0],
bx_iodebug_s.registers[1]);
bx_iodebug_s.registers[0] = 0;
bx_iodebug_s.registers[1] = 0;
break;
#if BX_DEBUGGER
case( 0x8AE0 ):
fprintf( stderr, "request return to dbg prompt received, 0x8AE0 command (iodebug)\n");
bx_guard.interrupt_requested=1;
break;
case( 0x8AE2):
fprintf( stderr, "request made by the guest os to disable tracing, iodebug port 0x8A00->0x8AE2\n");
BX_CPU(dbg_cpu)->trace = 0;
break;
case( 0x8AE3 ):
fprintf( stderr, "request made by the guest os to enable tracing, iodebug port 0x8A00->0x8AE3\n");
BX_CPU(dbg_cpu)->trace = 1;
break;
case( 0x8AE4 ):
fprintf( stderr, "request made by the guest os to disable register tracing, iodebug port 0x8A00->0x8AE4\n");
BX_CPU(dbg_cpu)->trace_reg = 0;
break;
case( 0x8AE5 ):
fprintf( stderr, "request made by the guest os to enable register tracing, iodebug port 0x8A00->0x8AE5\n");
BX_CPU(dbg_cpu)->trace_reg = 1;
break;
#endif
case( 0x8AFF ):
bx_iodebug_s.enabled = 0;
// fprintf( stderr, "IODEBUG device deactivated\n");
// break;
// default:
// fprintf(stderr,"IODEBUG unsupported register code\n");
}
}
// Static function
void bx_iodebug_c::mem_write( BX_CPU_C *cpu, Bit32u addr, unsigned len, void *data)
{
Bit32u data32;
Bit16u data16;
Bit8u data8;
unsigned int area;
if( !bx_iodebug_s.enabled ) return;
area = bx_iodebug_c::range_test( addr, len );
// Device is enabled, testing address ranges
if( area )
{
area--;
#if BX_DEBUGGER
fprintf( stdout, "%s @ eip: %08X wrote at monitored memory location %8X\n", cpu->name, cpu->get_EIP(), addr);
bx_guard.interrupt_requested=1;
#else
fprintf( stderr,
"IODEBUG write to monitored memory area: %2i\tby EIP:\t\t%08X\n\trange start: \t\t%08X\trange end:\t%08X\n\taddress accessed:\t%08X\tdata written:\t",
area,
cpu->get_EIP(),
bx_iodebug_s.monitored_mem_areas_start[area],
bx_iodebug_s.monitored_mem_areas_end[area],
(unsigned int)addr);
data32 = * (Bit32u *)data;
data16 = (Bit16u)data32;
data8 = (Bit8u)data32;
switch(len)
{
case(1):
fprintf(stderr,"%02X\n", (unsigned int)data8);
break;
case(2):
fprintf(stderr,"%04X\n", (unsigned int)data16);
break;
case(4):
fprintf(stderr,"%08X\n", (unsigned int)data32);
break;
default:
fprintf(stderr, "unsupported write size\n");
}
#endif
}
}
void bx_iodebug_c::mem_read( BX_CPU_C *cpu, Bit32u addr, unsigned len, void *data)
{
Bit32u data32;
Bit16u data16;
Bit8u data8;
unsigned int area;
if( !bx_iodebug_s.enabled ) return;
area = bx_iodebug_c::range_test( addr, len );
// Device is enabled, testing address ranges
if( area )
{
area--;
#if BX_DEBUGGER
fprintf( stdout, "%s @ eip: %8X wrote at monitored memory location %8X\n", cpu->name, cpu->get_EIP(), addr);
bx_guard.interrupt_requested=1;
#else
fprintf( stderr,
"IODEBUG read to monitored memory area: %2i\tby EIP:\t\t%08X\n\trange start: \t\t%08X\trange end:\t%08X\n\taddress accessed:\t%08X\tdata written:\t",
area,
cpu->get_EIP(),
bx_iodebug_s.monitored_mem_areas_start[area],
bx_iodebug_s.monitored_mem_areas_end[area],
(unsigned int)addr);
data32 = * (Bit32u *)data;
data16 = (Bit16u)data32;
data8 = (Bit8u)data32;
switch(len)
{
case(1):
fprintf(stderr,"%02X\n", (unsigned int)data8);
break;
case(2):
fprintf(stderr,"%04X\n", (unsigned int)data16);
break;
case(4):
fprintf(stderr,"%08X\n", (unsigned int)data32);
break;
default:
fprintf(stderr, "unsupported write size\n");
}
#endif
}
}
unsigned int bx_iodebug_c::range_test( Bit32u addr, unsigned int len )
{
unsigned int i;
for(i=0;i<BX_IODEBUG_MAX_AREAS;i++)
{
if( (bx_iodebug_s.monitored_mem_areas_start[i]!=0) ||
(bx_iodebug_s.monitored_mem_areas_end[i]!=0) )
{
if( (Bit32u)(addr+len-1) < bx_iodebug_s.monitored_mem_areas_start[i] )
continue;
if( addr < bx_iodebug_s.monitored_mem_areas_end[i] )
{
return(++i);
}
}
}
return(0);
}
void bx_iodebug_c::add_range( Bit32u addr_start, Bit32u addr_end )
{
unsigned int i;
for(i=0;i<BX_IODEBUG_MAX_AREAS;i++)
{
if( !bx_iodebug_s.monitored_mem_areas_start[i] &&
!bx_iodebug_s.monitored_mem_areas_end[i] )
{
bx_iodebug_s.monitored_mem_areas_start[i] = addr_start;
bx_iodebug_s.monitored_mem_areas_end[i] = addr_end;
// fprintf(stderr, "IODEBUG added range successfully in slot: %i\n",i);
return;
}
}
// fprintf(stderr, "IODEBUG unable to register memory range, all slots taken\n");
}
#endif /* if BX_IODEBUG_SUPPORT */
|
