1
2
3
/*
* gdb server stub
*
4
* Copyright ( c ) 2003 - 2005 Fabrice Bellard
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
*
* This library is free software ; you can redistribute it and / or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation ; either
* version 2 of the License , or ( at your option ) any later version .
*
* This library is distributed in the hope that it will be useful ,
* but WITHOUT ANY WARRANTY ; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the GNU
* Lesser General Public License for more details .
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library ; if not , write to the Free Software
* Foundation , Inc ., 59 Temple Place , Suite 330 , Boston , MA 02111 - 1307 USA
*/
20
# include "config.h"
21
22
23
24
25
26
27
# ifdef CONFIG_USER_ONLY
# include < stdlib . h >
# include < stdio . h >
# include < stdarg . h >
# include < string . h >
# include < errno . h >
# include < unistd . h >
28
# include < fcntl . h >
29
30
31
# include "qemu.h"
# else
32
# include "vl.h"
33
# endif
34
35
36
37
38
39
40
41
42
43
44
# include "qemu_socket.h"
# ifdef _WIN32
/* XXX: these constants may be independent of the host ones even for Unix */
# ifndef SIGTRAP
# define SIGTRAP 5
# endif
# ifndef SIGINT
# define SIGINT 2
# endif
# else
45
# include < signal . h >
46
# endif
47
48
// # define DEBUG_GDB
49
50
51
52
53
54
enum RSState {
RS_IDLE ,
RS_GETLINE ,
RS_CHKSUM1 ,
RS_CHKSUM2 ,
55
RS_SYSCALL ,
56
57
};
typedef struct GDBState {
58
CPUState * env ; /* current CPU */
59
enum RSState state ; /* parsing state */
60
61
62
char line_buf [ 4096 ];
int line_buf_index ;
int line_csum ;
63
64
char last_packet [ 4100 ];
int last_packet_len ;
65
# ifdef CONFIG_USER_ONLY
66
int fd ;
67
int running_state ;
68
69
# else
CharDriverState * chr ;
70
# endif
71
} GDBState ;
72
73
# ifdef CONFIG_USER_ONLY
74
75
76
/* XXX: This is not thread safe. Do we care? */
static int gdbserver_fd = - 1 ;
77
78
79
/* XXX: remove this hack. */
static GDBState gdbserver_state ;
80
static int get_char ( GDBState * s )
81
82
83
84
85
{
uint8_t ch ;
int ret ;
for (;;) {
86
ret = recv ( s -> fd , & ch , 1 , 0 );
87
88
89
90
91
92
93
94
95
96
97
if ( ret < 0 ) {
if ( errno != EINTR && errno != EAGAIN )
return - 1 ;
} else if ( ret == 0 ) {
return - 1 ;
} else {
break ;
}
}
return ch ;
}
98
# endif
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
/* GDB stub state for use by semihosting syscalls. */
static GDBState * gdb_syscall_state ;
static gdb_syscall_complete_cb gdb_current_syscall_cb ;
enum {
GDB_SYS_UNKNOWN ,
GDB_SYS_ENABLED ,
GDB_SYS_DISABLED ,
} gdb_syscall_mode ;
/* If gdb is connected when the first semihosting syscall occurs then use
remote gdb syscalls . Otherwise use native file IO . */
int use_gdb_syscalls ( void )
{
if ( gdb_syscall_mode == GDB_SYS_UNKNOWN ) {
gdb_syscall_mode = ( gdb_syscall_state ? GDB_SYS_ENABLED
: GDB_SYS_DISABLED );
}
return gdb_syscall_mode == GDB_SYS_ENABLED ;
}
121
static void put_buffer ( GDBState * s , const uint8_t * buf , int len )
122
{
123
# ifdef CONFIG_USER_ONLY
124
125
126
int ret ;
while ( len > 0 ) {
127
ret = send ( s -> fd , buf , len , 0 );
128
129
130
131
132
133
134
135
if ( ret < 0 ) {
if ( errno != EINTR && errno != EAGAIN )
return ;
} else {
buf += ret ;
len -= ret ;
}
}
136
137
138
# else
qemu_chr_write ( s -> chr , buf , len );
# endif
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
}
static inline int fromhex ( int v )
{
if ( v >= '0' && v <= '9' )
return v - '0' ;
else if ( v >= 'A' && v <= 'F' )
return v - 'A' + 10 ;
else if ( v >= 'a' && v <= 'f' )
return v - 'a' + 10 ;
else
return 0 ;
}
static inline int tohex ( int v )
{
if ( v < 10 )
return v + '0' ;
else
return v - 10 + 'a' ;
}
static void memtohex ( char * buf , const uint8_t * mem , int len )
{
int i , c ;
char * q ;
q = buf ;
for ( i = 0 ; i < len ; i ++ ) {
c = mem [ i ];
* q ++ = tohex ( c >> 4 );
* q ++ = tohex ( c & 0xf );
}
* q = '\0' ;
}
static void hextomem ( uint8_t * mem , const char * buf , int len )
{
int i ;
for ( i = 0 ; i < len ; i ++ ) {
mem [ i ] = ( fromhex ( buf [ 0 ]) << 4 ) | fromhex ( buf [ 1 ]);
buf += 2 ;
}
}
/* return -1 if error, 0 if OK */
185
static int put_packet ( GDBState * s , char * buf )
186
{
187
188
int len , csum , i ;
char * p ;
189
190
191
192
193
194
# ifdef DEBUG_GDB
printf ( "reply='%s' \n " , buf );
# endif
for (;;) {
195
196
p = s -> last_packet ;
* ( p ++ ) = '$' ;
197
len = strlen ( buf );
198
199
memcpy ( p , buf , len );
p += len ;
200
201
202
203
csum = 0 ;
for ( i = 0 ; i < len ; i ++ ) {
csum += buf [ i ];
}
204
205
206
* ( p ++ ) = '#' ;
* ( p ++ ) = tohex (( csum >> 4 ) & 0xf );
* ( p ++ ) = tohex (( csum ) & 0xf );
207
208
209
s -> last_packet_len = p - s -> last_packet ;
put_buffer ( s , s -> last_packet , s -> last_packet_len );
210
211
212
213
# ifdef CONFIG_USER_ONLY
i = get_char ( s );
if ( i < 0 )
214
return - 1 ;
215
if ( i == '+' )
216
break ;
217
218
219
# else
break ;
# endif
220
221
222
223
}
return 0 ;
}
224
225
226
227
# if defined ( TARGET_I386 )
static int cpu_gdb_read_registers ( CPUState * env , uint8_t * mem_buf )
{
228
uint32_t * registers = ( uint32_t * ) mem_buf ;
229
230
231
int i , fpus ;
for ( i = 0 ; i < 8 ; i ++ ) {
232
registers [ i ] = env -> regs [ i ];
233
}
234
235
236
237
238
239
240
241
registers [ 8 ] = env -> eip ;
registers [ 9 ] = env -> eflags ;
registers [ 10 ] = env -> segs [ R_CS ]. selector ;
registers [ 11 ] = env -> segs [ R_SS ]. selector ;
registers [ 12 ] = env -> segs [ R_DS ]. selector ;
registers [ 13 ] = env -> segs [ R_ES ]. selector ;
registers [ 14 ] = env -> segs [ R_FS ]. selector ;
registers [ 15 ] = env -> segs [ R_GS ]. selector ;
242
243
244
245
/* XXX: convert floats */
for ( i = 0 ; i < 8 ; i ++ ) {
memcpy ( mem_buf + 16 * 4 + i * 10 , & env -> fpregs [ i ], 10 );
}
246
registers [ 36 ] = env -> fpuc ;
247
fpus = ( env -> fpus & ~ 0x3800 ) | ( env -> fpstt & 0x7 ) << 11 ;
248
249
250
251
252
253
254
255
256
257
258
259
registers [ 37 ] = fpus ;
registers [ 38 ] = 0 ; /* XXX: convert tags */
registers [ 39 ] = 0 ; /* fiseg */
registers [ 40 ] = 0 ; /* fioff */
registers [ 41 ] = 0 ; /* foseg */
registers [ 42 ] = 0 ; /* fooff */
registers [ 43 ] = 0 ; /* fop */
for ( i = 0 ; i < 16 ; i ++ )
tswapls ( & registers [ i ]);
for ( i = 36 ; i < 44 ; i ++ )
tswapls ( & registers [ i ]);
260
261
262
263
264
265
266
267
268
269
270
return 44 * 4 ;
}
static void cpu_gdb_write_registers ( CPUState * env , uint8_t * mem_buf , int size )
{
uint32_t * registers = ( uint32_t * ) mem_buf ;
int i ;
for ( i = 0 ; i < 8 ; i ++ ) {
env -> regs [ i ] = tswapl ( registers [ i ]);
}
271
272
env -> eip = tswapl ( registers [ 8 ]);
env -> eflags = tswapl ( registers [ 9 ]);
273
274
275
276
277
278
279
280
281
282
283
284
285
# if defined ( CONFIG_USER_ONLY )
# define LOAD_SEG ( index , sreg ) \
if ( tswapl ( registers [ index ]) != env -> segs [ sreg ]. selector ) \
cpu_x86_load_seg ( env , sreg , tswapl ( registers [ index ]));
LOAD_SEG ( 10 , R_CS );
LOAD_SEG ( 11 , R_SS );
LOAD_SEG ( 12 , R_DS );
LOAD_SEG ( 13 , R_ES );
LOAD_SEG ( 14 , R_FS );
LOAD_SEG ( 15 , R_GS );
# endif
}
286
287
288
# elif defined ( TARGET_PPC )
static int cpu_gdb_read_registers ( CPUState * env , uint8_t * mem_buf )
{
289
uint32_t * registers = ( uint32_t * ) mem_buf , tmp ;
290
291
292
int i ;
/* fill in gprs */
293
for ( i = 0 ; i < 32 ; i ++ ) {
294
registers [ i ] = tswapl ( env -> gpr [ i ]);
295
296
297
}
/* fill in fprs */
for ( i = 0 ; i < 32 ; i ++ ) {
298
299
registers [( i * 2 ) + 32 ] = tswapl ( * (( uint32_t * ) & env -> fpr [ i ]));
registers [( i * 2 ) + 33 ] = tswapl ( * (( uint32_t * ) & env -> fpr [ i ] + 1 ));
300
301
}
/* nip, msr, ccr, lnk, ctr, xer, mq */
302
registers [ 96 ] = tswapl ( env -> nip );
303
registers [ 97 ] = tswapl ( do_load_msr ( env ));
304
305
tmp = 0 ;
for ( i = 0 ; i < 8 ; i ++ )
306
tmp |= env -> crf [ i ] << ( 32 - (( i + 1 ) * 4 ));
307
308
309
registers [ 98 ] = tswapl ( tmp );
registers [ 99 ] = tswapl ( env -> lr );
registers [ 100 ] = tswapl ( env -> ctr );
310
registers [ 101 ] = tswapl ( ppc_load_xer ( env ));
311
registers [ 102 ] = 0 ;
312
313
return 103 * 4 ;
314
315
316
317
318
319
320
321
322
}
static void cpu_gdb_write_registers ( CPUState * env , uint8_t * mem_buf , int size )
{
uint32_t * registers = ( uint32_t * ) mem_buf ;
int i ;
/* fill in gprs */
for ( i = 0 ; i < 32 ; i ++ ) {
323
env -> gpr [ i ] = tswapl ( registers [ i ]);
324
325
326
}
/* fill in fprs */
for ( i = 0 ; i < 32 ; i ++ ) {
327
328
* (( uint32_t * ) & env -> fpr [ i ]) = tswapl ( registers [( i * 2 ) + 32 ]);
* (( uint32_t * ) & env -> fpr [ i ] + 1 ) = tswapl ( registers [( i * 2 ) + 33 ]);
329
330
}
/* nip, msr, ccr, lnk, ctr, xer, mq */
331
env -> nip = tswapl ( registers [ 96 ]);
332
do_store_msr ( env , tswapl ( registers [ 97 ]));
333
registers [ 98 ] = tswapl ( registers [ 98 ]);
334
for ( i = 0 ; i < 8 ; i ++ )
335
env -> crf [ i ] = ( registers [ 98 ] >> ( 32 - (( i + 1 ) * 4 ))) & 0xF ;
336
337
env -> lr = tswapl ( registers [ 99 ]);
env -> ctr = tswapl ( registers [ 100 ]);
338
ppc_store_xer ( env , tswapl ( registers [ 101 ]));
339
340
341
342
}
# elif defined ( TARGET_SPARC )
static int cpu_gdb_read_registers ( CPUState * env , uint8_t * mem_buf )
{
343
target_ulong * registers = ( target_ulong * ) mem_buf ;
344
345
346
int i ;
/* fill in g0..g7 */
347
for ( i = 0 ; i < 8 ; i ++ ) {
348
349
350
351
352
353
registers [ i ] = tswapl ( env -> gregs [ i ]);
}
/* fill in register window */
for ( i = 0 ; i < 24 ; i ++ ) {
registers [ i + 8 ] = tswapl ( env -> regwptr [ i ]);
}
354
# ifndef TARGET_SPARC64
355
356
357
358
359
360
/* fill in fprs */
for ( i = 0 ; i < 32 ; i ++ ) {
registers [ i + 32 ] = tswapl ( * (( uint32_t * ) & env -> fpr [ i ]));
}
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
registers [ 64 ] = tswapl ( env -> y );
361
362
363
364
365
366
{
target_ulong tmp ;
tmp = GET_PSR ( env );
registers [ 65 ] = tswapl ( tmp );
}
367
368
369
370
371
372
373
registers [ 66 ] = tswapl ( env -> wim );
registers [ 67 ] = tswapl ( env -> tbr );
registers [ 68 ] = tswapl ( env -> pc );
registers [ 69 ] = tswapl ( env -> npc );
registers [ 70 ] = tswapl ( env -> fsr );
registers [ 71 ] = 0 ; /* csr */
registers [ 72 ] = 0 ;
374
375
return 73 * sizeof ( target_ulong );
# else
376
377
378
379
/* fill in fprs */
for ( i = 0 ; i < 64 ; i += 2 ) {
uint64_t tmp ;
380
381
382
tmp = (( uint64_t ) * ( uint32_t * ) & env -> fpr [ i ]) << 32 ;
tmp |= * ( uint32_t * ) & env -> fpr [ i + 1 ];
registers [ i / 2 + 32 ] = tswap64 ( tmp );
383
}
384
385
386
387
388
389
390
registers [ 64 ] = tswapl ( env -> pc );
registers [ 65 ] = tswapl ( env -> npc );
registers [ 66 ] = tswapl ( env -> tstate [ env -> tl ]);
registers [ 67 ] = tswapl ( env -> fsr );
registers [ 68 ] = tswapl ( env -> fprs );
registers [ 69 ] = tswapl ( env -> y );
return 70 * sizeof ( target_ulong );
391
# endif
392
393
394
395
}
static void cpu_gdb_write_registers ( CPUState * env , uint8_t * mem_buf , int size )
{
396
target_ulong * registers = ( target_ulong * ) mem_buf ;
397
398
399
400
401
402
403
404
int i ;
/* fill in g0..g7 */
for ( i = 0 ; i < 7 ; i ++ ) {
env -> gregs [ i ] = tswapl ( registers [ i ]);
}
/* fill in register window */
for ( i = 0 ; i < 24 ; i ++ ) {
405
env -> regwptr [ i ] = tswapl ( registers [ i + 8 ]);
406
}
407
# ifndef TARGET_SPARC64
408
409
410
411
412
413
/* fill in fprs */
for ( i = 0 ; i < 32 ; i ++ ) {
* (( uint32_t * ) & env -> fpr [ i ]) = tswapl ( registers [ i + 32 ]);
}
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
env -> y = tswapl ( registers [ 64 ]);
414
PUT_PSR ( env , tswapl ( registers [ 65 ]));
415
416
417
418
419
env -> wim = tswapl ( registers [ 66 ]);
env -> tbr = tswapl ( registers [ 67 ]);
env -> pc = tswapl ( registers [ 68 ]);
env -> npc = tswapl ( registers [ 69 ]);
env -> fsr = tswapl ( registers [ 70 ]);
420
# else
421
for ( i = 0 ; i < 64 ; i += 2 ) {
422
423
424
425
426
uint64_t tmp ;
tmp = tswap64 ( registers [ i / 2 + 32 ]);
* (( uint32_t * ) & env -> fpr [ i ]) = tmp >> 32 ;
* (( uint32_t * ) & env -> fpr [ i + 1 ]) = tmp & 0xffffffff ;
427
}
428
429
430
431
432
433
env -> pc = tswapl ( registers [ 64 ]);
env -> npc = tswapl ( registers [ 65 ]);
env -> tstate [ env -> tl ] = tswapl ( registers [ 66 ]);
env -> fsr = tswapl ( registers [ 67 ]);
env -> fprs = tswapl ( registers [ 68 ]);
env -> y = tswapl ( registers [ 69 ]);
434
# endif
435
}
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
# elif defined ( TARGET_ARM )
static int cpu_gdb_read_registers ( CPUState * env , uint8_t * mem_buf )
{
int i ;
uint8_t * ptr ;
ptr = mem_buf ;
/* 16 core integer registers (4 bytes each). */
for ( i = 0 ; i < 16 ; i ++ )
{
* ( uint32_t * ) ptr = tswapl ( env -> regs [ i ]);
ptr += 4 ;
}
/* 8 FPA registers ( 12 bytes each ), FPS ( 4 bytes ).
Not yet implemented . */
memset ( ptr , 0 , 8 * 12 + 4 );
ptr += 8 * 12 + 4 ;
/* CPSR (4 bytes). */
454
* ( uint32_t * ) ptr = tswapl ( cpsr_read ( env ));
455
456
457
458
ptr += 4 ;
return ptr - mem_buf ;
}
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
static void cpu_gdb_write_registers ( CPUState * env , uint8_t * mem_buf , int size )
{
int i ;
uint8_t * ptr ;
ptr = mem_buf ;
/* Core integer registers. */
for ( i = 0 ; i < 16 ; i ++ )
{
env -> regs [ i ] = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
}
/* Ignore FPA regs and scr. */
ptr += 8 * 12 + 4 ;
474
cpsr_write ( env , tswapl ( * ( uint32_t * ) ptr ), 0xffffffff );
475
}
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
# elif defined ( TARGET_M68K )
static int cpu_gdb_read_registers ( CPUState * env , uint8_t * mem_buf )
{
int i ;
uint8_t * ptr ;
CPU_DoubleU u ;
ptr = mem_buf ;
/* D0-D7 */
for ( i = 0 ; i < 8 ; i ++ ) {
* ( uint32_t * ) ptr = tswapl ( env -> dregs [ i ]);
ptr += 4 ;
}
/* A0-A7 */
for ( i = 0 ; i < 8 ; i ++ ) {
* ( uint32_t * ) ptr = tswapl ( env -> aregs [ i ]);
ptr += 4 ;
}
* ( uint32_t * ) ptr = tswapl ( env -> sr );
ptr += 4 ;
* ( uint32_t * ) ptr = tswapl ( env -> pc );
ptr += 4 ;
/* F0 - F7 . The 68881 / 68040 have 12 - bit extended precision registers .
ColdFire has 8 - bit double precision registers . */
for ( i = 0 ; i < 8 ; i ++ ) {
u . d = env -> fregs [ i ];
* ( uint32_t * ) ptr = tswap32 ( u . l . upper );
* ( uint32_t * ) ptr = tswap32 ( u . l . lower );
}
/* FP control regs (not implemented). */
memset ( ptr , 0 , 3 * 4 );
ptr += 3 * 4 ;
return ptr - mem_buf ;
}
static void cpu_gdb_write_registers ( CPUState * env , uint8_t * mem_buf , int size )
{
int i ;
uint8_t * ptr ;
CPU_DoubleU u ;
ptr = mem_buf ;
/* D0-D7 */
for ( i = 0 ; i < 8 ; i ++ ) {
env -> dregs [ i ] = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
}
/* A0-A7 */
for ( i = 0 ; i < 8 ; i ++ ) {
env -> aregs [ i ] = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
}
env -> sr = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
env -> pc = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
/* F0 - F7 . The 68881 / 68040 have 12 - bit extended precision registers .
ColdFire has 8 - bit double precision registers . */
for ( i = 0 ; i < 8 ; i ++ ) {
u . l . upper = tswap32 ( * ( uint32_t * ) ptr );
u . l . lower = tswap32 ( * ( uint32_t * ) ptr );
env -> fregs [ i ] = u . d ;
}
/* FP control regs (not implemented). */
ptr += 3 * 4 ;
}
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
# elif defined ( TARGET_MIPS )
static int cpu_gdb_read_registers ( CPUState * env , uint8_t * mem_buf )
{
int i ;
uint8_t * ptr ;
ptr = mem_buf ;
for ( i = 0 ; i < 32 ; i ++ )
{
* ( uint32_t * ) ptr = tswapl ( env -> gpr [ i ]);
ptr += 4 ;
}
* ( uint32_t * ) ptr = tswapl ( env -> CP0_Status );
ptr += 4 ;
* ( uint32_t * ) ptr = tswapl ( env -> LO );
ptr += 4 ;
* ( uint32_t * ) ptr = tswapl ( env -> HI );
ptr += 4 ;
* ( uint32_t * ) ptr = tswapl ( env -> CP0_BadVAddr );
ptr += 4 ;
* ( uint32_t * ) ptr = tswapl ( env -> CP0_Cause );
ptr += 4 ;
* ( uint32_t * ) ptr = tswapl ( env -> PC );
ptr += 4 ;
ths
authored
18 years ago
574
if ( env -> CP0_Config1 & ( 1 << CP0C1_FP ))
ths
authored
18 years ago
575
{
ths
authored
18 years ago
576
577
for ( i = 0 ; i < 32 ; i ++ )
{
ths
authored
18 years ago
578
* ( uint32_t * ) ptr = tswapl ( env -> fpr [ i ]. fs [ FP_ENDIAN_IDX ]);
ths
authored
18 years ago
579
580
ptr += 4 ;
}
ths
authored
18 years ago
581
ths
authored
18 years ago
582
583
* ( uint32_t * ) ptr = tswapl ( env -> fcr31 );
ptr += 4 ;
ths
authored
18 years ago
584
ths
authored
18 years ago
585
586
587
* ( uint32_t * ) ptr = tswapl ( env -> fcr0 );
ptr += 4 ;
}
ths
authored
18 years ago
588
589
/* 32 FP registers, fsr, fir, fp. Not yet implemented. */
ths
authored
18 years ago
590
/* what's 'fp' mean here? */
591
592
593
594
return ptr - mem_buf ;
}
ths
authored
18 years ago
595
596
597
598
599
600
601
602
603
604
605
/* convert MIPS rounding mode in FCR31 to IEEE library */
static unsigned int ieee_rm [] =
{
float_round_nearest_even ,
float_round_to_zero ,
float_round_up ,
float_round_down
};
# define RESTORE_ROUNDING_MODE \
set_float_rounding_mode ( ieee_rm [ env -> fcr31 & 3 ], & env -> fp_status )
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
static void cpu_gdb_write_registers ( CPUState * env , uint8_t * mem_buf , int size )
{
int i ;
uint8_t * ptr ;
ptr = mem_buf ;
for ( i = 0 ; i < 32 ; i ++ )
{
env -> gpr [ i ] = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
}
env -> CP0_Status = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
env -> LO = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
env -> HI = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
env -> CP0_BadVAddr = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
env -> CP0_Cause = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
env -> PC = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
ths
authored
18 years ago
635
ths
authored
18 years ago
636
if ( env -> CP0_Config1 & ( 1 << CP0C1_FP ))
ths
authored
18 years ago
637
{
ths
authored
18 years ago
638
639
for ( i = 0 ; i < 32 ; i ++ )
{
ths
authored
18 years ago
640
env -> fpr [ i ]. fs [ FP_ENDIAN_IDX ] = tswapl ( * ( uint32_t * ) ptr );
ths
authored
18 years ago
641
642
ptr += 4 ;
}
ths
authored
18 years ago
643
ths
authored
18 years ago
644
645
env -> fcr31 = tswapl ( * ( uint32_t * ) ptr ) & 0x0183FFFF ;
ptr += 4 ;
ths
authored
18 years ago
646
ths
authored
18 years ago
647
648
env -> fcr0 = tswapl ( * ( uint32_t * ) ptr );
ptr += 4 ;
ths
authored
18 years ago
649
ths
authored
18 years ago
650
651
/* set rounding mode */
RESTORE_ROUNDING_MODE ;
ths
authored
18 years ago
652
653
# ifndef CONFIG_SOFTFLOAT
ths
authored
18 years ago
654
655
/* no floating point exception for native float */
SET_FP_ENABLE ( env -> fcr31 , 0 );
ths
authored
18 years ago
656
# endif
ths
authored
18 years ago
657
}
658
}
659
# elif defined ( TARGET_SH4 )
ths
authored
18 years ago
660
661
662
/* Hint: Use "set architecture sh4" in GDB to see fpu registers */
663
664
665
666
667
668
static int cpu_gdb_read_registers ( CPUState * env , uint8_t * mem_buf )
{
uint32_t * ptr = ( uint32_t * ) mem_buf ;
int i ;
# define SAVE ( x ) * ptr ++= tswapl ( x )
669
670
671
672
673
674
if (( env -> sr & ( SR_MD | SR_RB )) == ( SR_MD | SR_RB )) {
for ( i = 0 ; i < 8 ; i ++ ) SAVE ( env -> gregs [ i + 16 ]);
} else {
for ( i = 0 ; i < 8 ; i ++ ) SAVE ( env -> gregs [ i ]);
}
for ( i = 8 ; i < 16 ; i ++ ) SAVE ( env -> gregs [ i ]);
675
676
677
678
679
680
681
SAVE ( env -> pc );
SAVE ( env -> pr );
SAVE ( env -> gbr );
SAVE ( env -> vbr );
SAVE ( env -> mach );
SAVE ( env -> macl );
SAVE ( env -> sr );
ths
authored
18 years ago
682
683
684
685
686
687
688
689
SAVE ( env -> fpul );
SAVE ( env -> fpscr );
for ( i = 0 ; i < 16 ; i ++ )
SAVE ( env -> fregs [ i + (( env -> fpscr & FPSCR_FR ) ? 16 : 0 )]);
SAVE ( env -> ssr );
SAVE ( env -> spc );
for ( i = 0 ; i < 8 ; i ++ ) SAVE ( env -> gregs [ i ]);
for ( i = 0 ; i < 8 ; i ++ ) SAVE ( env -> gregs [ i + 16 ]);
690
691
692
693
694
695
696
697
698
return (( uint8_t * ) ptr - mem_buf );
}
static void cpu_gdb_write_registers ( CPUState * env , uint8_t * mem_buf , int size )
{
uint32_t * ptr = ( uint32_t * ) mem_buf ;
int i ;
# define LOAD ( x ) ( x ) =* ptr ++ ;
699
700
701
702
703
704
if (( env -> sr & ( SR_MD | SR_RB )) == ( SR_MD | SR_RB )) {
for ( i = 0 ; i < 8 ; i ++ ) LOAD ( env -> gregs [ i + 16 ]);
} else {
for ( i = 0 ; i < 8 ; i ++ ) LOAD ( env -> gregs [ i ]);
}
for ( i = 8 ; i < 16 ; i ++ ) LOAD ( env -> gregs [ i ]);
705
706
707
708
709
710
711
LOAD ( env -> pc );
LOAD ( env -> pr );
LOAD ( env -> gbr );
LOAD ( env -> vbr );
LOAD ( env -> mach );
LOAD ( env -> macl );
LOAD ( env -> sr );
ths
authored
18 years ago
712
713
714
715
716
717
718
719
LOAD ( env -> fpul );
LOAD ( env -> fpscr );
for ( i = 0 ; i < 16 ; i ++ )
LOAD ( env -> fregs [ i + (( env -> fpscr & FPSCR_FR ) ? 16 : 0 )]);
LOAD ( env -> ssr );
LOAD ( env -> spc );
for ( i = 0 ; i < 8 ; i ++ ) LOAD ( env -> gregs [ i ]);
for ( i = 0 ; i < 8 ; i ++ ) LOAD ( env -> gregs [ i + 16 ]);
720
}
721
# else
722
723
724
725
726
727
728
729
730
731
static int cpu_gdb_read_registers ( CPUState * env , uint8_t * mem_buf )
{
return 0 ;
}
static void cpu_gdb_write_registers ( CPUState * env , uint8_t * mem_buf , int size )
{
}
# endif
732
733
static int gdb_handle_packet ( GDBState * s , CPUState * env , const char * line_buf )
734
735
{
const char * p ;
736
int ch , reg_size , type ;
737
738
739
char buf [ 4096 ];
uint8_t mem_buf [ 2000 ];
uint32_t * registers ;
740
target_ulong addr , len ;
741
742
743
744
745
746
747
748
# ifdef DEBUG_GDB
printf ( "command='%s' \n " , line_buf );
# endif
p = line_buf ;
ch = * p ++ ;
switch ( ch ) {
case '?' :
749
/* TODO: Make this return the correct value for user-mode. */
750
751
752
753
754
snprintf ( buf , sizeof ( buf ), "S%02x" , SIGTRAP );
put_packet ( s , buf );
break ;
case 'c' :
if ( * p != '\0' ) {
755
addr = strtoull ( p , ( char ** ) & p , 16 );
756
# if defined ( TARGET_I386 )
757
env -> eip = addr ;
758
# elif defined ( TARGET_PPC )
759
env -> nip = addr ;
760
761
762
# elif defined ( TARGET_SPARC )
env -> pc = addr ;
env -> npc = addr + 4 ;
763
764
# elif defined ( TARGET_ARM )
env -> regs [ 15 ] = addr ;
765
766
# elif defined ( TARGET_SH4 )
env -> pc = addr ;
767
# endif
768
}
769
770
771
772
773
774
# ifdef CONFIG_USER_ONLY
s -> running_state = 1 ;
# else
vm_start ();
# endif
return RS_IDLE ;
775
776
777
case 's' :
if ( * p != '\0' ) {
addr = strtoul ( p , ( char ** ) & p , 16 );
778
# if defined ( TARGET_I386 )
779
env -> eip = addr ;
780
# elif defined ( TARGET_PPC )
781
env -> nip = addr ;
782
783
784
# elif defined ( TARGET_SPARC )
env -> pc = addr ;
env -> npc = addr + 4 ;
785
786
# elif defined ( TARGET_ARM )
env -> regs [ 15 ] = addr ;
787
788
# elif defined ( TARGET_SH4 )
env -> pc = addr ;
789
# endif
790
791
}
cpu_single_step ( env , 1 );
792
793
794
795
796
797
# ifdef CONFIG_USER_ONLY
s -> running_state = 1 ;
# else
vm_start ();
# endif
return RS_IDLE ;
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
case 'F' :
{
target_ulong ret ;
target_ulong err ;
ret = strtoull ( p , ( char ** ) & p , 16 );
if ( * p == ',' ) {
p ++ ;
err = strtoull ( p , ( char ** ) & p , 16 );
} else {
err = 0 ;
}
if ( * p == ',' )
p ++ ;
type = * p ;
if ( gdb_current_syscall_cb )
gdb_current_syscall_cb ( s -> env , ret , err );
if ( type == 'C' ) {
put_packet ( s , "T02" );
} else {
# ifdef CONFIG_USER_ONLY
s -> running_state = 1 ;
# else
vm_start ();
# endif
}
}
break ;
826
827
828
829
830
831
832
833
834
835
836
837
838
case 'g' :
reg_size = cpu_gdb_read_registers ( env , mem_buf );
memtohex ( buf , mem_buf , reg_size );
put_packet ( s , buf );
break ;
case 'G' :
registers = ( void * ) mem_buf ;
len = strlen ( p ) / 2 ;
hextomem (( uint8_t * ) registers , p , len );
cpu_gdb_write_registers ( env , mem_buf , len );
put_packet ( s , "OK" );
break ;
case 'm' :
839
addr = strtoull ( p , ( char ** ) & p , 16 );
840
841
if ( * p == ',' )
p ++ ;
842
len = strtoull ( p , NULL , 16 );
843
844
845
846
847
848
if ( cpu_memory_rw_debug ( env , addr , mem_buf , len , 0 ) != 0 ) {
put_packet ( s , "E14" );
} else {
memtohex ( buf , mem_buf , len );
put_packet ( s , buf );
}
849
850
break ;
case 'M' :
851
addr = strtoull ( p , ( char ** ) & p , 16 );
852
853
if ( * p == ',' )
p ++ ;
854
len = strtoull ( p , ( char ** ) & p , 16 );
855
if ( * p == ':' )
856
857
858
p ++ ;
hextomem ( mem_buf , p , len );
if ( cpu_memory_rw_debug ( env , addr , mem_buf , len , 1 ) != 0 )
859
put_packet ( s , "E14" );
860
861
862
863
864
865
866
else
put_packet ( s , "OK" );
break ;
case 'Z' :
type = strtoul ( p , ( char ** ) & p , 16 );
if ( * p == ',' )
p ++ ;
867
addr = strtoull ( p , ( char ** ) & p , 16 );
868
869
if ( * p == ',' )
p ++ ;
870
len = strtoull ( p , ( char ** ) & p , 16 );
871
872
873
874
if ( type == 0 || type == 1 ) {
if ( cpu_breakpoint_insert ( env , addr ) < 0 )
goto breakpoint_error ;
put_packet ( s , "OK" );
875
876
877
878
879
880
# ifndef CONFIG_USER_ONLY
} else if ( type == 2 ) {
if ( cpu_watchpoint_insert ( env , addr ) < 0 )
goto breakpoint_error ;
put_packet ( s , "OK" );
# endif
881
882
} else {
breakpoint_error :
883
put_packet ( s , "E22" );
884
885
886
887
888
889
}
break ;
case 'z' :
type = strtoul ( p , ( char ** ) & p , 16 );
if ( * p == ',' )
p ++ ;
890
addr = strtoull ( p , ( char ** ) & p , 16 );
891
892
if ( * p == ',' )
p ++ ;
893
len = strtoull ( p , ( char ** ) & p , 16 );
894
895
896
if ( type == 0 || type == 1 ) {
cpu_breakpoint_remove ( env , addr );
put_packet ( s , "OK" );
897
898
899
900
901
# ifndef CONFIG_USER_ONLY
} else if ( type == 2 ) {
cpu_watchpoint_remove ( env , addr );
put_packet ( s , "OK" );
# endif
902
903
904
905
} else {
goto breakpoint_error ;
}
break ;
ths
authored
18 years ago
906
# ifdef CONFIG_LINUX_USER
907
908
909
910
911
912
913
914
915
916
917
case 'q' :
if ( strncmp ( p , "Offsets" , 7 ) == 0 ) {
TaskState * ts = env -> opaque ;
sprintf ( buf , "Text=%x;Data=%x;Bss=%x" , ts -> info -> code_offset ,
ts -> info -> data_offset , ts -> info -> data_offset );
put_packet ( s , buf );
break ;
}
/* Fall through. */
# endif
918
919
920
921
922
923
924
925
926
927
default :
// unknown_command :
/* put empty packet */
buf [ 0 ] = '\0' ;
put_packet ( s , buf );
break ;
}
return RS_IDLE ;
}
928
929
extern void tb_flush ( CPUState * env );
930
# ifndef CONFIG_USER_ONLY
931
932
933
934
935
936
static void gdb_vm_stopped ( void * opaque , int reason )
{
GDBState * s = opaque ;
char buf [ 256 ];
int ret ;
937
938
939
if ( s -> state == RS_SYSCALL )
return ;
940
/* disable single step if it was enable */
941
cpu_single_step ( s -> env , 0 );
942
943
if ( reason == EXCP_DEBUG ) {
944
if ( s -> env -> watchpoint_hit ) {
945
946
snprintf ( buf , sizeof ( buf ), "T%02xwatch:" TARGET_FMT_lx ";" ,
SIGTRAP ,
947
948
949
950
951
s -> env -> watchpoint [ s -> env -> watchpoint_hit - 1 ]. vaddr );
put_packet ( s , buf );
s -> env -> watchpoint_hit = 0 ;
return ;
}
952
tb_flush ( s -> env );
953
ret = SIGTRAP ;
954
955
956
} else if ( reason == EXCP_INTERRUPT ) {
ret = SIGINT ;
} else {
957
ret = 0 ;
958
}
959
960
961
snprintf ( buf , sizeof ( buf ), "S%02x" , ret );
put_packet ( s , buf );
}
962
# endif
963
964
965
/* Send a gdb syscall request .
This accepts limited printf - style format specifiers , specifically :
966
967
968
% x - target_ulong argument printed in hex .
% lx - 64 - bit argument printed in hex .
% s - string pointer ( target_ulong ) and length ( int ) pair . */
969
970
971
972
973
974
void gdb_do_syscall ( gdb_syscall_complete_cb cb , char * fmt , ...)
{
va_list va ;
char buf [ 256 ];
char * p ;
target_ulong addr ;
975
uint64_t i64 ;
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
GDBState * s ;
s = gdb_syscall_state ;
if ( ! s )
return ;
gdb_current_syscall_cb = cb ;
s -> state = RS_SYSCALL ;
# ifndef CONFIG_USER_ONLY
vm_stop ( EXCP_DEBUG );
# endif
s -> state = RS_IDLE ;
va_start ( va , fmt );
p = buf ;
* ( p ++ ) = 'F' ;
while ( * fmt ) {
if ( * fmt == '%' ) {
fmt ++ ;
switch ( * fmt ++ ) {
case 'x' :
addr = va_arg ( va , target_ulong );
p += sprintf ( p , TARGET_FMT_lx , addr );
break ;
998
999
1000
1001
1002
1003
case 'l' :
if ( * ( fmt ++ ) != 'x' )
goto bad_format ;
i64 = va_arg ( va , uint64_t );
p += sprintf ( p , "%" PRIx64 , i64 );
break ;
1004
1005
1006
1007
1008
case 's' :
addr = va_arg ( va , target_ulong );
p += sprintf ( p , TARGET_FMT_lx "/%x" , addr , va_arg ( va , int ));
break ;
default :
1009
bad_format :
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
fprintf ( stderr , "gdbstub: Bad syscall format string '%s' \n " ,
fmt - 1 );
break ;
}
} else {
* ( p ++ ) = * ( fmt ++ );
}
}
va_end ( va );
put_packet ( s , buf );
# ifdef CONFIG_USER_ONLY
gdb_handlesig ( s -> env , 0 );
# else
cpu_interrupt ( s -> env , CPU_INTERRUPT_EXIT );
# endif
}
1027
static void gdb_read_byte ( GDBState * s , int ch )
1028
{
1029
CPUState * env = s -> env ;
1030
1031
1032
int i , csum ;
char reply [ 1 ];
1033
# ifndef CONFIG_USER_ONLY
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
if ( s -> last_packet_len ) {
/* Waiting for a response to the last packet . If we see the start
of a new command then abandon the previous response . */
if ( ch == '-' ) {
# ifdef DEBUG_GDB
printf ( "Got NACK, retransmitting \n " );
# endif
put_buffer ( s , s -> last_packet , s -> last_packet_len );
}
# ifdef DEBUG_GDB
else if ( ch == '+' )
printf ( "Got ACK \n " );
else
printf ( "Got '%c' when expecting ACK/NACK \n " , ch );
# endif
if ( ch == '+' || ch == '$' )
s -> last_packet_len = 0 ;
if ( ch != '$' )
return ;
}
1054
1055
1056
1057
if ( vm_running ) {
/* when the CPU is running , we cannot do anything except stop
it when receiving a char */
vm_stop ( EXCP_INTERRUPT );
1058
} else
1059
# endif
1060
{
1061
1062
1063
1064
1065
switch ( s -> state ) {
case RS_IDLE :
if ( ch == '$' ) {
s -> line_buf_index = 0 ;
s -> state = RS_GETLINE ;
1066
}
1067
break ;
1068
1069
1070
1071
1072
case RS_GETLINE :
if ( ch == '#' ) {
s -> state = RS_CHKSUM1 ;
} else if ( s -> line_buf_index >= sizeof ( s -> line_buf ) - 1 ) {
s -> state = RS_IDLE ;
1073
} else {
1074
s -> line_buf [ s -> line_buf_index ++ ] = ch ;
1075
1076
}
break ;
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
case RS_CHKSUM1 :
s -> line_buf [ s -> line_buf_index ] = '\0' ;
s -> line_csum = fromhex ( ch ) << 4 ;
s -> state = RS_CHKSUM2 ;
break ;
case RS_CHKSUM2 :
s -> line_csum |= fromhex ( ch );
csum = 0 ;
for ( i = 0 ; i < s -> line_buf_index ; i ++ ) {
csum += s -> line_buf [ i ];
}
if ( s -> line_csum != ( csum & 0xff )) {
reply [ 0 ] = '-' ;
put_buffer ( s , reply , 1 );
s -> state = RS_IDLE ;
1092
} else {
1093
1094
reply [ 0 ] = '+' ;
put_buffer ( s , reply , 1 );
1095
s -> state = gdb_handle_packet ( s , env , s -> line_buf );
1096
1097
}
break ;
1098
1099
default :
abort ();
1100
1101
1102
1103
}
}
}
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
# ifdef CONFIG_USER_ONLY
int
gdb_handlesig ( CPUState * env , int sig )
{
GDBState * s ;
char buf [ 256 ];
int n ;
if ( gdbserver_fd < 0 )
return sig ;
s = & gdbserver_state ;
/* disable single step if it was enabled */
cpu_single_step ( env , 0 );
tb_flush ( env );
if ( sig != 0 )
{
snprintf ( buf , sizeof ( buf ), "S%02x" , sig );
put_packet ( s , buf );
}
sig = 0 ;
s -> state = RS_IDLE ;
1129
1130
s -> running_state = 0 ;
while ( s -> running_state == 0 ) {
1131
1132
1133
1134
1135
1136
n = read ( s -> fd , buf , 256 );
if ( n > 0 )
{
int i ;
for ( i = 0 ; i < n ; i ++ )
1137
gdb_read_byte ( s , buf [ i ]);
1138
1139
1140
1141
1142
1143
1144
}
else if ( n == 0 || errno != EAGAIN )
{
/* XXX : Connection closed . Should probably wait for annother
connection before continuing . */
return sig ;
}
1145
}
1146
1147
return sig ;
}
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
/* Tell the remote gdb that the process has exited. */
void gdb_exit ( CPUState * env , int code )
{
GDBState * s ;
char buf [ 4 ];
if ( gdbserver_fd < 0 )
return ;
s = & gdbserver_state ;
snprintf ( buf , sizeof ( buf ), "W%02x" , code );
put_packet ( s , buf );
}
1164
1165
static void gdb_accept ( void * opaque )
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
{
GDBState * s ;
struct sockaddr_in sockaddr ;
socklen_t len ;
int val , fd ;
for (;;) {
len = sizeof ( sockaddr );
fd = accept ( gdbserver_fd , ( struct sockaddr * ) & sockaddr , & len );
if ( fd < 0 && errno != EINTR ) {
perror ( "accept" );
return ;
} else if ( fd >= 0 ) {
1179
1180
1181
break ;
}
}
1182
1183
1184
/* set short latency */
val = 1 ;
1185
setsockopt ( fd , IPPROTO_TCP , TCP_NODELAY , ( char * ) & val , sizeof ( val ));
1186
1187
1188
s = & gdbserver_state ;
memset ( s , 0 , sizeof ( GDBState ));
1189
s -> env = first_cpu ; /* XXX: allow to change CPU */
1190
1191
s -> fd = fd ;
1192
1193
gdb_syscall_state = s ;
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
fcntl ( fd , F_SETFL , O_NONBLOCK );
}
static int gdbserver_open ( int port )
{
struct sockaddr_in sockaddr ;
int fd , val , ret ;
fd = socket ( PF_INET , SOCK_STREAM , 0 );
if ( fd < 0 ) {
perror ( "socket" );
return - 1 ;
}
/* allow fast reuse */
val = 1 ;
1210
setsockopt ( fd , SOL_SOCKET , SO_REUSEADDR , ( char * ) & val , sizeof ( val ));
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
sockaddr . sin_family = AF_INET ;
sockaddr . sin_port = htons ( port );
sockaddr . sin_addr . s_addr = 0 ;
ret = bind ( fd , ( struct sockaddr * ) & sockaddr , sizeof ( sockaddr ));
if ( ret < 0 ) {
perror ( "bind" );
return - 1 ;
}
ret = listen ( fd , 0 );
if ( ret < 0 ) {
perror ( "listen" );
return - 1 ;
}
return fd ;
}
int gdbserver_start ( int port )
{
gdbserver_fd = gdbserver_open ( port );
if ( gdbserver_fd < 0 )
return - 1 ;
/* accept connections */
1234
gdb_accept ( NULL );
1235
1236
return 0 ;
}
1237
# else
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
static int gdb_chr_can_recieve ( void * opaque )
{
return 1 ;
}
static void gdb_chr_recieve ( void * opaque , const uint8_t * buf , int size )
{
GDBState * s = opaque ;
int i ;
for ( i = 0 ; i < size ; i ++ ) {
gdb_read_byte ( s , buf [ i ]);
}
}
static void gdb_chr_event ( void * opaque , int event )
{
switch ( event ) {
case CHR_EVENT_RESET :
vm_stop ( EXCP_INTERRUPT );
1258
gdb_syscall_state = opaque ;
1259
1260
1261
1262
1263
1264
break ;
default :
break ;
}
}
1265
int gdbserver_start ( const char * port )
1266
1267
{
GDBState * s ;
1268
1269
1270
1271
1272
1273
1274
char gdbstub_port_name [ 128 ];
int port_num ;
char * p ;
CharDriverState * chr ;
if ( ! port || !* port )
return - 1 ;
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
port_num = strtol ( port , & p , 10 );
if ( * p == 0 ) {
/* A numeric value is interpreted as a port number. */
snprintf ( gdbstub_port_name , sizeof ( gdbstub_port_name ),
"tcp::%d,nowait,nodelay,server" , port_num );
port = gdbstub_port_name ;
}
chr = qemu_chr_open ( port );
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
if ( ! chr )
return - 1 ;
s = qemu_mallocz ( sizeof ( GDBState ));
if ( ! s ) {
return - 1 ;
}
s -> env = first_cpu ; /* XXX: allow to change CPU */
s -> chr = chr ;
qemu_chr_add_handlers ( chr , gdb_chr_can_recieve , gdb_chr_recieve ,
gdb_chr_event , s );
qemu_add_vm_stop_handler ( gdb_vm_stopped , s );
1297
1298
return 0 ;
}
1299
# endif