forked from awilliam/qemu-vfio
-
Notifications
You must be signed in to change notification settings - Fork 0
/
gdbstub.c
2012 lines (1844 loc) · 51.9 KB
/
gdbstub.c
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
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
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
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
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
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
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
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
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* gdb server stub
*
* Copyright (c) 2003-2005 Fabrice Bellard
*
* 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
*/
#include "config.h"
#include "qemu-common.h"
#ifdef CONFIG_USER_ONLY
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include "qemu.h"
#else
#include "qemu-char.h"
#include "sysemu.h"
#include "gdbstub.h"
#endif
#define MAX_PACKET_LENGTH 4096
#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
#include <signal.h>
#endif
//#define DEBUG_GDB
typedef struct GDBRegisterState {
int base_reg;
int num_regs;
gdb_reg_cb get_reg;
gdb_reg_cb set_reg;
const char *xml;
struct GDBRegisterState *next;
} GDBRegisterState;
enum RSState {
RS_IDLE,
RS_GETLINE,
RS_CHKSUM1,
RS_CHKSUM2,
RS_SYSCALL,
};
typedef struct GDBState {
CPUState *c_cpu; /* current CPU for step/continue ops */
CPUState *g_cpu; /* current CPU for other ops */
CPUState *query_cpu; /* for q{f|s}ThreadInfo */
enum RSState state; /* parsing state */
char line_buf[MAX_PACKET_LENGTH];
int line_buf_index;
int line_csum;
uint8_t last_packet[MAX_PACKET_LENGTH + 4];
int last_packet_len;
int signal;
#ifdef CONFIG_USER_ONLY
int fd;
int running_state;
#else
CharDriverState *chr;
#endif
} GDBState;
/* By default use no IRQs and no timers while single stepping so as to
* make single stepping like an ICE HW step.
*/
static int sstep_flags = SSTEP_ENABLE|SSTEP_NOIRQ|SSTEP_NOTIMER;
static GDBState *gdbserver_state;
/* This is an ugly hack to cope with both new and old gdb.
If gdb sends qXfer:features:read then assume we're talking to a newish
gdb that understands target descriptions. */
static int gdb_has_xml;
#ifdef CONFIG_USER_ONLY
/* XXX: This is not thread safe. Do we care? */
static int gdbserver_fd = -1;
static int get_char(GDBState *s)
{
uint8_t ch;
int ret;
for(;;) {
ret = recv(s->fd, &ch, 1, 0);
if (ret < 0) {
if (errno == ECONNRESET)
s->fd = -1;
if (errno != EINTR && errno != EAGAIN)
return -1;
} else if (ret == 0) {
close(s->fd);
s->fd = -1;
return -1;
} else {
break;
}
}
return ch;
}
#endif
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 = (gdbserver_state ? GDB_SYS_ENABLED
: GDB_SYS_DISABLED);
}
return gdb_syscall_mode == GDB_SYS_ENABLED;
}
/* Resume execution. */
static inline void gdb_continue(GDBState *s)
{
#ifdef CONFIG_USER_ONLY
s->running_state = 1;
#else
vm_start();
#endif
}
static void put_buffer(GDBState *s, const uint8_t *buf, int len)
{
#ifdef CONFIG_USER_ONLY
int ret;
while (len > 0) {
ret = send(s->fd, buf, len, 0);
if (ret < 0) {
if (errno != EINTR && errno != EAGAIN)
return;
} else {
buf += ret;
len -= ret;
}
}
#else
qemu_chr_write(s->chr, buf, len);
#endif
}
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 */
static int put_packet_binary(GDBState *s, const char *buf, int len)
{
int csum, i;
uint8_t *p;
for(;;) {
p = s->last_packet;
*(p++) = '$';
memcpy(p, buf, len);
p += len;
csum = 0;
for(i = 0; i < len; i++) {
csum += buf[i];
}
*(p++) = '#';
*(p++) = tohex((csum >> 4) & 0xf);
*(p++) = tohex((csum) & 0xf);
s->last_packet_len = p - s->last_packet;
put_buffer(s, (uint8_t *)s->last_packet, s->last_packet_len);
#ifdef CONFIG_USER_ONLY
i = get_char(s);
if (i < 0)
return -1;
if (i == '+')
break;
#else
break;
#endif
}
return 0;
}
/* return -1 if error, 0 if OK */
static int put_packet(GDBState *s, const char *buf)
{
#ifdef DEBUG_GDB
printf("reply='%s'\n", buf);
#endif
return put_packet_binary(s, buf, strlen(buf));
}
/* The GDB remote protocol transfers values in target byte order. This means
we can use the raw memory access routines to access the value buffer.
Conveniently, these also handle the case where the buffer is mis-aligned.
*/
#define GET_REG8(val) do { \
stb_p(mem_buf, val); \
return 1; \
} while(0)
#define GET_REG16(val) do { \
stw_p(mem_buf, val); \
return 2; \
} while(0)
#define GET_REG32(val) do { \
stl_p(mem_buf, val); \
return 4; \
} while(0)
#define GET_REG64(val) do { \
stq_p(mem_buf, val); \
return 8; \
} while(0)
#if TARGET_LONG_BITS == 64
#define GET_REGL(val) GET_REG64(val)
#define ldtul_p(addr) ldq_p(addr)
#else
#define GET_REGL(val) GET_REG32(val)
#define ldtul_p(addr) ldl_p(addr)
#endif
#if defined(TARGET_I386)
#ifdef TARGET_X86_64
static const int gpr_map[16] = {
R_EAX, R_EBX, R_ECX, R_EDX, R_ESI, R_EDI, R_EBP, R_ESP,
8, 9, 10, 11, 12, 13, 14, 15
};
#else
static const int gpr_map[8] = {0, 1, 2, 3, 4, 5, 6, 7};
#endif
#define NUM_CORE_REGS (CPU_NB_REGS * 2 + 25)
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n)
{
if (n < CPU_NB_REGS) {
GET_REGL(env->regs[gpr_map[n]]);
} else if (n >= CPU_NB_REGS + 8 && n < CPU_NB_REGS + 16) {
/* FIXME: byteswap float values. */
#ifdef USE_X86LDOUBLE
memcpy(mem_buf, &env->fpregs[n - (CPU_NB_REGS + 8)], 10);
#else
memset(mem_buf, 0, 10);
#endif
return 10;
} else if (n >= CPU_NB_REGS + 24) {
n -= CPU_NB_REGS + 24;
if (n < CPU_NB_REGS) {
stq_p(mem_buf, env->xmm_regs[n].XMM_Q(0));
stq_p(mem_buf + 8, env->xmm_regs[n].XMM_Q(1));
return 16;
} else if (n == CPU_NB_REGS) {
GET_REG32(env->mxcsr);
}
} else {
n -= CPU_NB_REGS;
switch (n) {
case 0: GET_REGL(env->eip);
case 1: GET_REG32(env->eflags);
case 2: GET_REG32(env->segs[R_CS].selector);
case 3: GET_REG32(env->segs[R_SS].selector);
case 4: GET_REG32(env->segs[R_DS].selector);
case 5: GET_REG32(env->segs[R_ES].selector);
case 6: GET_REG32(env->segs[R_FS].selector);
case 7: GET_REG32(env->segs[R_GS].selector);
/* 8...15 x87 regs. */
case 16: GET_REG32(env->fpuc);
case 17: GET_REG32((env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11);
case 18: GET_REG32(0); /* ftag */
case 19: GET_REG32(0); /* fiseg */
case 20: GET_REG32(0); /* fioff */
case 21: GET_REG32(0); /* foseg */
case 22: GET_REG32(0); /* fooff */
case 23: GET_REG32(0); /* fop */
/* 24+ xmm regs. */
}
}
return 0;
}
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int i)
{
uint32_t tmp;
if (i < CPU_NB_REGS) {
env->regs[gpr_map[i]] = ldtul_p(mem_buf);
return sizeof(target_ulong);
} else if (i >= CPU_NB_REGS + 8 && i < CPU_NB_REGS + 16) {
i -= CPU_NB_REGS + 8;
#ifdef USE_X86LDOUBLE
memcpy(&env->fpregs[i], mem_buf, 10);
#endif
return 10;
} else if (i >= CPU_NB_REGS + 24) {
i -= CPU_NB_REGS + 24;
if (i < CPU_NB_REGS) {
env->xmm_regs[i].XMM_Q(0) = ldq_p(mem_buf);
env->xmm_regs[i].XMM_Q(1) = ldq_p(mem_buf + 8);
return 16;
} else if (i == CPU_NB_REGS) {
env->mxcsr = ldl_p(mem_buf);
return 4;
}
} else {
i -= CPU_NB_REGS;
switch (i) {
case 0: env->eip = ldtul_p(mem_buf); return sizeof(target_ulong);
case 1: env->eflags = ldl_p(mem_buf); return 4;
#if defined(CONFIG_USER_ONLY)
#define LOAD_SEG(index, sreg)\
tmp = ldl_p(mem_buf);\
if (tmp != env->segs[sreg].selector)\
cpu_x86_load_seg(env, sreg, tmp);
#else
/* FIXME: Honor segment registers. Needs to avoid raising an exception
when the selector is invalid. */
#define LOAD_SEG(index, sreg) do {} while(0)
#endif
case 2: LOAD_SEG(10, R_CS); return 4;
case 3: LOAD_SEG(11, R_SS); return 4;
case 4: LOAD_SEG(12, R_DS); return 4;
case 5: LOAD_SEG(13, R_ES); return 4;
case 6: LOAD_SEG(14, R_FS); return 4;
case 7: LOAD_SEG(15, R_GS); return 4;
/* 8...15 x87 regs. */
case 16: env->fpuc = ldl_p(mem_buf); return 4;
case 17:
tmp = ldl_p(mem_buf);
env->fpstt = (tmp >> 11) & 7;
env->fpus = tmp & ~0x3800;
return 4;
case 18: /* ftag */ return 4;
case 19: /* fiseg */ return 4;
case 20: /* fioff */ return 4;
case 21: /* foseg */ return 4;
case 22: /* fooff */ return 4;
case 23: /* fop */ return 4;
/* 24+ xmm regs. */
}
}
/* Unrecognised register. */
return 0;
}
#elif defined (TARGET_PPC)
#define NUM_CORE_REGS 71
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n)
{
if (n < 32) {
/* gprs */
GET_REGL(env->gpr[n]);
} else if (n < 64) {
/* fprs */
stfq_p(mem_buf, env->fpr[n-32]);
return 8;
} else {
switch (n) {
case 64: GET_REGL(env->nip);
case 65: GET_REGL(env->msr);
case 66:
{
uint32_t cr = 0;
int i;
for (i = 0; i < 8; i++)
cr |= env->crf[i] << (32 - ((i + 1) * 4));
GET_REG32(cr);
}
case 67: GET_REGL(env->lr);
case 68: GET_REGL(env->ctr);
case 69: GET_REGL(env->xer);
case 70: GET_REG32(0); /* fpscr */
}
}
return 0;
}
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n)
{
if (n < 32) {
/* gprs */
env->gpr[n] = ldtul_p(mem_buf);
return sizeof(target_ulong);
} else if (n < 64) {
/* fprs */
env->fpr[n-32] = ldfq_p(mem_buf);
return 8;
} else {
switch (n) {
case 64:
env->nip = ldtul_p(mem_buf);
return sizeof(target_ulong);
case 65:
ppc_store_msr(env, ldtul_p(mem_buf));
return sizeof(target_ulong);
case 66:
{
uint32_t cr = ldl_p(mem_buf);
int i;
for (i = 0; i < 8; i++)
env->crf[i] = (cr >> (32 - ((i + 1) * 4))) & 0xF;
return 4;
}
case 67:
env->lr = ldtul_p(mem_buf);
return sizeof(target_ulong);
case 68:
env->ctr = ldtul_p(mem_buf);
return sizeof(target_ulong);
case 69:
env->xer = ldtul_p(mem_buf);
return sizeof(target_ulong);
case 70:
/* fpscr */
return 4;
}
}
return 0;
}
#elif defined (TARGET_SPARC)
#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
#define NUM_CORE_REGS 86
#else
#define NUM_CORE_REGS 73
#endif
#ifdef TARGET_ABI32
#define GET_REGA(val) GET_REG32(val)
#else
#define GET_REGA(val) GET_REGL(val)
#endif
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n)
{
if (n < 8) {
/* g0..g7 */
GET_REGA(env->gregs[n]);
}
if (n < 32) {
/* register window */
GET_REGA(env->regwptr[n - 8]);
}
#if defined(TARGET_ABI32) || !defined(TARGET_SPARC64)
if (n < 64) {
/* fprs */
GET_REG32(*((uint32_t *)&env->fpr[n - 32]));
}
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
switch (n) {
case 64: GET_REGA(env->y);
case 65: GET_REGA(GET_PSR(env));
case 66: GET_REGA(env->wim);
case 67: GET_REGA(env->tbr);
case 68: GET_REGA(env->pc);
case 69: GET_REGA(env->npc);
case 70: GET_REGA(env->fsr);
case 71: GET_REGA(0); /* csr */
case 72: GET_REGA(0);
}
#else
if (n < 64) {
/* f0-f31 */
GET_REG32(*((uint32_t *)&env->fpr[n - 32]));
}
if (n < 80) {
/* f32-f62 (double width, even numbers only) */
uint64_t val;
val = (uint64_t)*((uint32_t *)&env->fpr[(n - 64) * 2 + 32]) << 32;
val |= *((uint32_t *)&env->fpr[(n - 64) * 2 + 33]);
GET_REG64(val);
}
switch (n) {
case 80: GET_REGL(env->pc);
case 81: GET_REGL(env->npc);
case 82: GET_REGL(((uint64_t)GET_CCR(env) << 32) |
((env->asi & 0xff) << 24) |
((env->pstate & 0xfff) << 8) |
GET_CWP64(env));
case 83: GET_REGL(env->fsr);
case 84: GET_REGL(env->fprs);
case 85: GET_REGL(env->y);
}
#endif
return 0;
}
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n)
{
#if defined(TARGET_ABI32)
abi_ulong tmp;
tmp = ldl_p(mem_buf);
#else
target_ulong tmp;
tmp = ldtul_p(mem_buf);
#endif
if (n < 8) {
/* g0..g7 */
env->gregs[n] = tmp;
} else if (n < 32) {
/* register window */
env->regwptr[n - 8] = tmp;
}
#if defined(TARGET_ABI32) || !defined(TARGET_SPARC64)
else if (n < 64) {
/* fprs */
*((uint32_t *)&env->fpr[n - 32]) = tmp;
} else {
/* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
switch (n) {
case 64: env->y = tmp; break;
case 65: PUT_PSR(env, tmp); break;
case 66: env->wim = tmp; break;
case 67: env->tbr = tmp; break;
case 68: env->pc = tmp; break;
case 69: env->npc = tmp; break;
case 70: env->fsr = tmp; break;
default: return 0;
}
}
return 4;
#else
else if (n < 64) {
/* f0-f31 */
env->fpr[n] = ldfl_p(mem_buf);
return 4;
} else if (n < 80) {
/* f32-f62 (double width, even numbers only) */
*((uint32_t *)&env->fpr[(n - 64) * 2 + 32]) = tmp >> 32;
*((uint32_t *)&env->fpr[(n - 64) * 2 + 33]) = tmp;
} else {
switch (n) {
case 80: env->pc = tmp; break;
case 81: env->npc = tmp; break;
case 82:
PUT_CCR(env, tmp >> 32);
env->asi = (tmp >> 24) & 0xff;
env->pstate = (tmp >> 8) & 0xfff;
PUT_CWP64(env, tmp & 0xff);
break;
case 83: env->fsr = tmp; break;
case 84: env->fprs = tmp; break;
case 85: env->y = tmp; break;
default: return 0;
}
}
return 8;
#endif
}
#elif defined (TARGET_ARM)
/* Old gdb always expect FPA registers. Newer (xml-aware) gdb only expect
whatever the target description contains. Due to a historical mishap
the FPA registers appear in between core integer regs and the CPSR.
We hack round this by giving the FPA regs zero size when talking to a
newer gdb. */
#define NUM_CORE_REGS 26
#define GDB_CORE_XML "arm-core.xml"
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n)
{
if (n < 16) {
/* Core integer register. */
GET_REG32(env->regs[n]);
}
if (n < 24) {
/* FPA registers. */
if (gdb_has_xml)
return 0;
memset(mem_buf, 0, 12);
return 12;
}
switch (n) {
case 24:
/* FPA status register. */
if (gdb_has_xml)
return 0;
GET_REG32(0);
case 25:
/* CPSR */
GET_REG32(cpsr_read(env));
}
/* Unknown register. */
return 0;
}
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n)
{
uint32_t tmp;
tmp = ldl_p(mem_buf);
/* Mask out low bit of PC to workaround gdb bugs. This will probably
cause problems if we ever implement the Jazelle DBX extensions. */
if (n == 15)
tmp &= ~1;
if (n < 16) {
/* Core integer register. */
env->regs[n] = tmp;
return 4;
}
if (n < 24) { /* 16-23 */
/* FPA registers (ignored). */
if (gdb_has_xml)
return 0;
return 12;
}
switch (n) {
case 24:
/* FPA status register (ignored). */
if (gdb_has_xml)
return 0;
return 4;
case 25:
/* CPSR */
cpsr_write (env, tmp, 0xffffffff);
return 4;
}
/* Unknown register. */
return 0;
}
#elif defined (TARGET_M68K)
#define NUM_CORE_REGS 18
#define GDB_CORE_XML "cf-core.xml"
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n)
{
if (n < 8) {
/* D0-D7 */
GET_REG32(env->dregs[n]);
} else if (n < 16) {
/* A0-A7 */
GET_REG32(env->aregs[n - 8]);
} else {
switch (n) {
case 16: GET_REG32(env->sr);
case 17: GET_REG32(env->pc);
}
}
/* FP registers not included here because they vary between
ColdFire and m68k. Use XML bits for these. */
return 0;
}
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n)
{
uint32_t tmp;
tmp = ldl_p(mem_buf);
if (n < 8) {
/* D0-D7 */
env->dregs[n] = tmp;
} else if (n < 8) {
/* A0-A7 */
env->aregs[n - 8] = tmp;
} else {
switch (n) {
case 16: env->sr = tmp; break;
case 17: env->pc = tmp; break;
default: return 0;
}
}
return 4;
}
#elif defined (TARGET_MIPS)
#define NUM_CORE_REGS 73
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n)
{
if (n < 32) {
GET_REGL(env->active_tc.gpr[n]);
}
if (env->CP0_Config1 & (1 << CP0C1_FP)) {
if (n >= 38 && n < 70) {
if (env->CP0_Status & (1 << CP0St_FR))
GET_REGL(env->active_fpu.fpr[n - 38].d);
else
GET_REGL(env->active_fpu.fpr[n - 38].w[FP_ENDIAN_IDX]);
}
switch (n) {
case 70: GET_REGL((int32_t)env->active_fpu.fcr31);
case 71: GET_REGL((int32_t)env->active_fpu.fcr0);
}
}
switch (n) {
case 32: GET_REGL((int32_t)env->CP0_Status);
case 33: GET_REGL(env->active_tc.LO[0]);
case 34: GET_REGL(env->active_tc.HI[0]);
case 35: GET_REGL(env->CP0_BadVAddr);
case 36: GET_REGL((int32_t)env->CP0_Cause);
case 37: GET_REGL(env->active_tc.PC);
case 72: GET_REGL(0); /* fp */
case 89: GET_REGL((int32_t)env->CP0_PRid);
}
if (n >= 73 && n <= 88) {
/* 16 embedded regs. */
GET_REGL(0);
}
return 0;
}
/* 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->active_fpu.fcr31 & 3], &env->active_fpu.fp_status)
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n)
{
target_ulong tmp;
tmp = ldtul_p(mem_buf);
if (n < 32) {
env->active_tc.gpr[n] = tmp;
return sizeof(target_ulong);
}
if (env->CP0_Config1 & (1 << CP0C1_FP)
&& n >= 38 && n < 73) {
if (n < 70) {
if (env->CP0_Status & (1 << CP0St_FR))
env->active_fpu.fpr[n - 38].d = tmp;
else
env->active_fpu.fpr[n - 38].w[FP_ENDIAN_IDX] = tmp;
}
switch (n) {
case 70:
env->active_fpu.fcr31 = tmp & 0xFF83FFFF;
/* set rounding mode */
RESTORE_ROUNDING_MODE;
#ifndef CONFIG_SOFTFLOAT
/* no floating point exception for native float */
SET_FP_ENABLE(env->active_fpu.fcr31, 0);
#endif
break;
case 71: env->active_fpu.fcr0 = tmp; break;
}
return sizeof(target_ulong);
}
switch (n) {
case 32: env->CP0_Status = tmp; break;
case 33: env->active_tc.LO[0] = tmp; break;
case 34: env->active_tc.HI[0] = tmp; break;
case 35: env->CP0_BadVAddr = tmp; break;
case 36: env->CP0_Cause = tmp; break;
case 37: env->active_tc.PC = tmp; break;
case 72: /* fp, ignored */ break;
default:
if (n > 89)
return 0;
/* Other registers are readonly. Ignore writes. */
break;
}
return sizeof(target_ulong);
}
#elif defined (TARGET_SH4)
/* Hint: Use "set architecture sh4" in GDB to see fpu registers */
/* FIXME: We should use XML for this. */
#define NUM_CORE_REGS 59
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n)
{
if (n < 8) {
if ((env->sr & (SR_MD | SR_RB)) == (SR_MD | SR_RB)) {
GET_REGL(env->gregs[n + 16]);
} else {
GET_REGL(env->gregs[n]);
}
} else if (n < 16) {
GET_REGL(env->gregs[n - 8]);
} else if (n >= 25 && n < 41) {
GET_REGL(env->fregs[(n - 25) + ((env->fpscr & FPSCR_FR) ? 16 : 0)]);
} else if (n >= 43 && n < 51) {
GET_REGL(env->gregs[n - 43]);
} else if (n >= 51 && n < 59) {
GET_REGL(env->gregs[n - (51 - 16)]);
}
switch (n) {
case 16: GET_REGL(env->pc);
case 17: GET_REGL(env->pr);
case 18: GET_REGL(env->gbr);
case 19: GET_REGL(env->vbr);
case 20: GET_REGL(env->mach);
case 21: GET_REGL(env->macl);
case 22: GET_REGL(env->sr);
case 23: GET_REGL(env->fpul);
case 24: GET_REGL(env->fpscr);
case 41: GET_REGL(env->ssr);
case 42: GET_REGL(env->spc);
}
return 0;
}
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n)
{
uint32_t tmp;
tmp = ldl_p(mem_buf);
if (n < 8) {
if ((env->sr & (SR_MD | SR_RB)) == (SR_MD | SR_RB)) {
env->gregs[n + 16] = tmp;
} else {
env->gregs[n] = tmp;
}
return 4;
} else if (n < 16) {
env->gregs[n - 8] = tmp;
return 4;
} else if (n >= 25 && n < 41) {
env->fregs[(n - 25) + ((env->fpscr & FPSCR_FR) ? 16 : 0)] = tmp;
} else if (n >= 43 && n < 51) {
env->gregs[n - 43] = tmp;
return 4;
} else if (n >= 51 && n < 59) {
env->gregs[n - (51 - 16)] = tmp;
return 4;
}
switch (n) {
case 16: env->pc = tmp;
case 17: env->pr = tmp;
case 18: env->gbr = tmp;
case 19: env->vbr = tmp;
case 20: env->mach = tmp;
case 21: env->macl = tmp;
case 22: env->sr = tmp;
case 23: env->fpul = tmp;
case 24: env->fpscr = tmp;
case 41: env->ssr = tmp;
case 42: env->spc = tmp;
default: return 0;
}
return 4;
}
#elif defined (TARGET_CRIS)
#define NUM_CORE_REGS 49
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n)
{
uint8_t srs;
srs = env->pregs[PR_SRS];
if (n < 16) {
GET_REG32(env->regs[n]);
}
if (n >= 21 && n < 32) {
GET_REG32(env->pregs[n - 16]);
}
if (n >= 33 && n < 49) {
GET_REG32(env->sregs[srs][n - 33]);
}
switch (n) {
case 16: GET_REG8(env->pregs[0]);
case 17: GET_REG8(env->pregs[1]);
case 18: GET_REG32(env->pregs[2]);
case 19: GET_REG8(srs);
case 20: GET_REG16(env->pregs[4]);
case 32: GET_REG32(env->pc);
}
return 0;
}
static int cpu_gdb_write_register(CPUState *env, uint8_t *mem_buf, int n)
{
uint32_t tmp;
if (n > 49)
return 0;
tmp = ldl_p(mem_buf);
if (n < 16) {
env->regs[n] = tmp;
}
if (n >= 21 && n < 32) {
env->pregs[n - 16] = tmp;
}
/* FIXME: Should support function regs be writable? */
switch (n) {
case 16: return 1;
case 17: return 1;
case 18: env->pregs[PR_PID] = tmp; break;
case 19: return 1;
case 20: return 2;
case 32: env->pc = tmp; break;
}
return 4;
}
#else
#define NUM_CORE_REGS 0
static int cpu_gdb_read_register(CPUState *env, uint8_t *mem_buf, int n)
{
return 0;
}