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b4608c04 FB |
1 | /* |
2 | * gdb server stub | |
3 | * | |
4 | * Copyright (c) 2003 Fabrice Bellard | |
5 | * | |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | */ | |
1fddef4b FB |
20 | #ifdef CONFIG_USER_ONLY |
21 | #include <stdlib.h> | |
22 | #include <stdio.h> | |
23 | #include <stdarg.h> | |
24 | #include <string.h> | |
25 | #include <errno.h> | |
26 | #include <unistd.h> | |
27 | ||
28 | #include "qemu.h" | |
29 | #else | |
67b915a5 | 30 | #include "vl.h" |
1fddef4b | 31 | #endif |
67b915a5 | 32 | |
b4608c04 FB |
33 | #include <sys/socket.h> |
34 | #include <netinet/in.h> | |
35 | #include <netinet/tcp.h> | |
36 | #include <signal.h> | |
b4608c04 | 37 | |
4abe615b | 38 | //#define DEBUG_GDB |
b4608c04 | 39 | |
858693c6 FB |
40 | enum RSState { |
41 | RS_IDLE, | |
42 | RS_GETLINE, | |
43 | RS_CHKSUM1, | |
44 | RS_CHKSUM2, | |
45 | }; | |
1fddef4b FB |
46 | /* XXX: This is not thread safe. Do we care? */ |
47 | static int gdbserver_fd = -1; | |
b4608c04 | 48 | |
858693c6 | 49 | typedef struct GDBState { |
41625033 | 50 | enum RSState state; /* parsing state */ |
858693c6 FB |
51 | int fd; |
52 | char line_buf[4096]; | |
53 | int line_buf_index; | |
54 | int line_csum; | |
41625033 FB |
55 | #ifdef CONFIG_USER_ONLY |
56 | int running_state; | |
57 | #endif | |
858693c6 | 58 | } GDBState; |
b4608c04 | 59 | |
1fddef4b FB |
60 | #ifdef CONFIG_USER_ONLY |
61 | /* XXX: remove this hack. */ | |
62 | static GDBState gdbserver_state; | |
63 | #endif | |
64 | ||
858693c6 | 65 | static int get_char(GDBState *s) |
b4608c04 FB |
66 | { |
67 | uint8_t ch; | |
68 | int ret; | |
69 | ||
70 | for(;;) { | |
858693c6 | 71 | ret = read(s->fd, &ch, 1); |
b4608c04 FB |
72 | if (ret < 0) { |
73 | if (errno != EINTR && errno != EAGAIN) | |
74 | return -1; | |
75 | } else if (ret == 0) { | |
76 | return -1; | |
77 | } else { | |
78 | break; | |
79 | } | |
80 | } | |
81 | return ch; | |
82 | } | |
83 | ||
858693c6 | 84 | static void put_buffer(GDBState *s, const uint8_t *buf, int len) |
b4608c04 FB |
85 | { |
86 | int ret; | |
87 | ||
88 | while (len > 0) { | |
858693c6 | 89 | ret = write(s->fd, buf, len); |
b4608c04 FB |
90 | if (ret < 0) { |
91 | if (errno != EINTR && errno != EAGAIN) | |
92 | return; | |
93 | } else { | |
94 | buf += ret; | |
95 | len -= ret; | |
96 | } | |
97 | } | |
98 | } | |
99 | ||
100 | static inline int fromhex(int v) | |
101 | { | |
102 | if (v >= '0' && v <= '9') | |
103 | return v - '0'; | |
104 | else if (v >= 'A' && v <= 'F') | |
105 | return v - 'A' + 10; | |
106 | else if (v >= 'a' && v <= 'f') | |
107 | return v - 'a' + 10; | |
108 | else | |
109 | return 0; | |
110 | } | |
111 | ||
112 | static inline int tohex(int v) | |
113 | { | |
114 | if (v < 10) | |
115 | return v + '0'; | |
116 | else | |
117 | return v - 10 + 'a'; | |
118 | } | |
119 | ||
120 | static void memtohex(char *buf, const uint8_t *mem, int len) | |
121 | { | |
122 | int i, c; | |
123 | char *q; | |
124 | q = buf; | |
125 | for(i = 0; i < len; i++) { | |
126 | c = mem[i]; | |
127 | *q++ = tohex(c >> 4); | |
128 | *q++ = tohex(c & 0xf); | |
129 | } | |
130 | *q = '\0'; | |
131 | } | |
132 | ||
133 | static void hextomem(uint8_t *mem, const char *buf, int len) | |
134 | { | |
135 | int i; | |
136 | ||
137 | for(i = 0; i < len; i++) { | |
138 | mem[i] = (fromhex(buf[0]) << 4) | fromhex(buf[1]); | |
139 | buf += 2; | |
140 | } | |
141 | } | |
142 | ||
b4608c04 | 143 | /* return -1 if error, 0 if OK */ |
858693c6 | 144 | static int put_packet(GDBState *s, char *buf) |
b4608c04 FB |
145 | { |
146 | char buf1[3]; | |
147 | int len, csum, ch, i; | |
148 | ||
149 | #ifdef DEBUG_GDB | |
150 | printf("reply='%s'\n", buf); | |
151 | #endif | |
152 | ||
153 | for(;;) { | |
154 | buf1[0] = '$'; | |
858693c6 | 155 | put_buffer(s, buf1, 1); |
b4608c04 | 156 | len = strlen(buf); |
858693c6 | 157 | put_buffer(s, buf, len); |
b4608c04 FB |
158 | csum = 0; |
159 | for(i = 0; i < len; i++) { | |
160 | csum += buf[i]; | |
161 | } | |
162 | buf1[0] = '#'; | |
163 | buf1[1] = tohex((csum >> 4) & 0xf); | |
164 | buf1[2] = tohex((csum) & 0xf); | |
165 | ||
858693c6 | 166 | put_buffer(s, buf1, 3); |
b4608c04 | 167 | |
858693c6 | 168 | ch = get_char(s); |
b4608c04 FB |
169 | if (ch < 0) |
170 | return -1; | |
171 | if (ch == '+') | |
172 | break; | |
173 | } | |
174 | return 0; | |
175 | } | |
176 | ||
6da41eaf FB |
177 | #if defined(TARGET_I386) |
178 | ||
6da41eaf FB |
179 | static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) |
180 | { | |
e95c8d51 | 181 | uint32_t *registers = (uint32_t *)mem_buf; |
6da41eaf FB |
182 | int i, fpus; |
183 | ||
184 | for(i = 0; i < 8; i++) { | |
e95c8d51 | 185 | registers[i] = env->regs[i]; |
6da41eaf | 186 | } |
e95c8d51 FB |
187 | registers[8] = env->eip; |
188 | registers[9] = env->eflags; | |
189 | registers[10] = env->segs[R_CS].selector; | |
190 | registers[11] = env->segs[R_SS].selector; | |
191 | registers[12] = env->segs[R_DS].selector; | |
192 | registers[13] = env->segs[R_ES].selector; | |
193 | registers[14] = env->segs[R_FS].selector; | |
194 | registers[15] = env->segs[R_GS].selector; | |
6da41eaf FB |
195 | /* XXX: convert floats */ |
196 | for(i = 0; i < 8; i++) { | |
197 | memcpy(mem_buf + 16 * 4 + i * 10, &env->fpregs[i], 10); | |
198 | } | |
e95c8d51 | 199 | registers[36] = env->fpuc; |
6da41eaf | 200 | fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11; |
e95c8d51 FB |
201 | registers[37] = fpus; |
202 | registers[38] = 0; /* XXX: convert tags */ | |
203 | registers[39] = 0; /* fiseg */ | |
204 | registers[40] = 0; /* fioff */ | |
205 | registers[41] = 0; /* foseg */ | |
206 | registers[42] = 0; /* fooff */ | |
207 | registers[43] = 0; /* fop */ | |
208 | ||
209 | for(i = 0; i < 16; i++) | |
210 | tswapls(®isters[i]); | |
211 | for(i = 36; i < 44; i++) | |
212 | tswapls(®isters[i]); | |
6da41eaf FB |
213 | return 44 * 4; |
214 | } | |
215 | ||
216 | static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) | |
217 | { | |
218 | uint32_t *registers = (uint32_t *)mem_buf; | |
219 | int i; | |
220 | ||
221 | for(i = 0; i < 8; i++) { | |
222 | env->regs[i] = tswapl(registers[i]); | |
223 | } | |
e95c8d51 FB |
224 | env->eip = tswapl(registers[8]); |
225 | env->eflags = tswapl(registers[9]); | |
6da41eaf FB |
226 | #if defined(CONFIG_USER_ONLY) |
227 | #define LOAD_SEG(index, sreg)\ | |
228 | if (tswapl(registers[index]) != env->segs[sreg].selector)\ | |
229 | cpu_x86_load_seg(env, sreg, tswapl(registers[index])); | |
230 | LOAD_SEG(10, R_CS); | |
231 | LOAD_SEG(11, R_SS); | |
232 | LOAD_SEG(12, R_DS); | |
233 | LOAD_SEG(13, R_ES); | |
234 | LOAD_SEG(14, R_FS); | |
235 | LOAD_SEG(15, R_GS); | |
236 | #endif | |
237 | } | |
238 | ||
9e62fd7f | 239 | #elif defined (TARGET_PPC) |
9e62fd7f FB |
240 | static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) |
241 | { | |
a541f297 | 242 | uint32_t *registers = (uint32_t *)mem_buf, tmp; |
9e62fd7f FB |
243 | int i; |
244 | ||
245 | /* fill in gprs */ | |
a541f297 | 246 | for(i = 0; i < 32; i++) { |
e95c8d51 | 247 | registers[i] = tswapl(env->gpr[i]); |
9e62fd7f FB |
248 | } |
249 | /* fill in fprs */ | |
250 | for (i = 0; i < 32; i++) { | |
e95c8d51 FB |
251 | registers[(i * 2) + 32] = tswapl(*((uint32_t *)&env->fpr[i])); |
252 | registers[(i * 2) + 33] = tswapl(*((uint32_t *)&env->fpr[i] + 1)); | |
9e62fd7f FB |
253 | } |
254 | /* nip, msr, ccr, lnk, ctr, xer, mq */ | |
e95c8d51 FB |
255 | registers[96] = tswapl(env->nip); |
256 | registers[97] = tswapl(_load_msr(env)); | |
9e62fd7f FB |
257 | tmp = 0; |
258 | for (i = 0; i < 8; i++) | |
a541f297 | 259 | tmp |= env->crf[i] << (32 - ((i + 1) * 4)); |
e95c8d51 FB |
260 | registers[98] = tswapl(tmp); |
261 | registers[99] = tswapl(env->lr); | |
262 | registers[100] = tswapl(env->ctr); | |
263 | registers[101] = tswapl(_load_xer(env)); | |
264 | registers[102] = 0; | |
a541f297 FB |
265 | |
266 | return 103 * 4; | |
9e62fd7f FB |
267 | } |
268 | ||
269 | static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) | |
270 | { | |
271 | uint32_t *registers = (uint32_t *)mem_buf; | |
272 | int i; | |
273 | ||
274 | /* fill in gprs */ | |
275 | for (i = 0; i < 32; i++) { | |
e95c8d51 | 276 | env->gpr[i] = tswapl(registers[i]); |
9e62fd7f FB |
277 | } |
278 | /* fill in fprs */ | |
279 | for (i = 0; i < 32; i++) { | |
e95c8d51 FB |
280 | *((uint32_t *)&env->fpr[i]) = tswapl(registers[(i * 2) + 32]); |
281 | *((uint32_t *)&env->fpr[i] + 1) = tswapl(registers[(i * 2) + 33]); | |
9e62fd7f FB |
282 | } |
283 | /* nip, msr, ccr, lnk, ctr, xer, mq */ | |
e95c8d51 FB |
284 | env->nip = tswapl(registers[96]); |
285 | _store_msr(env, tswapl(registers[97])); | |
286 | registers[98] = tswapl(registers[98]); | |
9e62fd7f | 287 | for (i = 0; i < 8; i++) |
a541f297 | 288 | env->crf[i] = (registers[98] >> (32 - ((i + 1) * 4))) & 0xF; |
e95c8d51 FB |
289 | env->lr = tswapl(registers[99]); |
290 | env->ctr = tswapl(registers[100]); | |
291 | _store_xer(env, tswapl(registers[101])); | |
292 | } | |
293 | #elif defined (TARGET_SPARC) | |
294 | static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) | |
295 | { | |
296 | uint32_t *registers = (uint32_t *)mem_buf, tmp; | |
297 | int i; | |
298 | ||
299 | /* fill in g0..g7 */ | |
300 | for(i = 0; i < 7; i++) { | |
301 | registers[i] = tswapl(env->gregs[i]); | |
302 | } | |
303 | /* fill in register window */ | |
304 | for(i = 0; i < 24; i++) { | |
305 | registers[i + 8] = tswapl(env->regwptr[i]); | |
306 | } | |
307 | /* fill in fprs */ | |
308 | for (i = 0; i < 32; i++) { | |
309 | registers[i + 32] = tswapl(*((uint32_t *)&env->fpr[i])); | |
310 | } | |
311 | /* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */ | |
312 | registers[64] = tswapl(env->y); | |
e80cfcfc | 313 | tmp = GET_PSR(env); |
e95c8d51 FB |
314 | registers[65] = tswapl(tmp); |
315 | registers[66] = tswapl(env->wim); | |
316 | registers[67] = tswapl(env->tbr); | |
317 | registers[68] = tswapl(env->pc); | |
318 | registers[69] = tswapl(env->npc); | |
319 | registers[70] = tswapl(env->fsr); | |
320 | registers[71] = 0; /* csr */ | |
321 | registers[72] = 0; | |
322 | ||
323 | return 73 * 4; | |
324 | } | |
325 | ||
326 | static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) | |
327 | { | |
e80cfcfc | 328 | uint32_t *registers = (uint32_t *)mem_buf; |
e95c8d51 FB |
329 | int i; |
330 | ||
331 | /* fill in g0..g7 */ | |
332 | for(i = 0; i < 7; i++) { | |
333 | env->gregs[i] = tswapl(registers[i]); | |
334 | } | |
335 | /* fill in register window */ | |
336 | for(i = 0; i < 24; i++) { | |
337 | env->regwptr[i] = tswapl(registers[i]); | |
338 | } | |
339 | /* fill in fprs */ | |
340 | for (i = 0; i < 32; i++) { | |
341 | *((uint32_t *)&env->fpr[i]) = tswapl(registers[i + 32]); | |
342 | } | |
343 | /* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */ | |
344 | env->y = tswapl(registers[64]); | |
e80cfcfc | 345 | PUT_PSR(env, tswapl(registers[65])); |
e95c8d51 FB |
346 | env->wim = tswapl(registers[66]); |
347 | env->tbr = tswapl(registers[67]); | |
348 | env->pc = tswapl(registers[68]); | |
349 | env->npc = tswapl(registers[69]); | |
350 | env->fsr = tswapl(registers[70]); | |
9e62fd7f | 351 | } |
1fddef4b FB |
352 | #elif defined (TARGET_ARM) |
353 | static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) | |
354 | { | |
355 | int i; | |
356 | uint8_t *ptr; | |
357 | ||
358 | ptr = mem_buf; | |
359 | /* 16 core integer registers (4 bytes each). */ | |
360 | for (i = 0; i < 16; i++) | |
361 | { | |
362 | *(uint32_t *)ptr = tswapl(env->regs[i]); | |
363 | ptr += 4; | |
364 | } | |
365 | /* 8 FPA registers (12 bytes each), FPS (4 bytes). | |
366 | Not yet implemented. */ | |
367 | memset (ptr, 0, 8 * 12 + 4); | |
368 | ptr += 8 * 12 + 4; | |
369 | /* CPSR (4 bytes). */ | |
370 | *(uint32_t *)ptr = tswapl (env->cpsr); | |
371 | ptr += 4; | |
372 | ||
373 | return ptr - mem_buf; | |
374 | } | |
6da41eaf | 375 | |
1fddef4b FB |
376 | static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) |
377 | { | |
378 | int i; | |
379 | uint8_t *ptr; | |
380 | ||
381 | ptr = mem_buf; | |
382 | /* Core integer registers. */ | |
383 | for (i = 0; i < 16; i++) | |
384 | { | |
385 | env->regs[i] = tswapl(*(uint32_t *)ptr); | |
386 | ptr += 4; | |
387 | } | |
388 | /* Ignore FPA regs and scr. */ | |
389 | ptr += 8 * 12 + 4; | |
390 | env->cpsr = tswapl(*(uint32_t *)ptr); | |
391 | } | |
392 | #else | |
6da41eaf FB |
393 | static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) |
394 | { | |
395 | return 0; | |
396 | } | |
397 | ||
398 | static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) | |
399 | { | |
400 | } | |
401 | ||
402 | #endif | |
b4608c04 | 403 | |
1fddef4b | 404 | static int gdb_handle_packet(GDBState *s, CPUState *env, const char *line_buf) |
b4608c04 | 405 | { |
b4608c04 | 406 | const char *p; |
858693c6 | 407 | int ch, reg_size, type; |
b4608c04 FB |
408 | char buf[4096]; |
409 | uint8_t mem_buf[2000]; | |
410 | uint32_t *registers; | |
411 | uint32_t addr, len; | |
412 | ||
858693c6 FB |
413 | #ifdef DEBUG_GDB |
414 | printf("command='%s'\n", line_buf); | |
415 | #endif | |
416 | p = line_buf; | |
417 | ch = *p++; | |
418 | switch(ch) { | |
419 | case '?': | |
1fddef4b | 420 | /* TODO: Make this return the correct value for user-mode. */ |
858693c6 FB |
421 | snprintf(buf, sizeof(buf), "S%02x", SIGTRAP); |
422 | put_packet(s, buf); | |
423 | break; | |
424 | case 'c': | |
425 | if (*p != '\0') { | |
426 | addr = strtoul(p, (char **)&p, 16); | |
4c3a88a2 | 427 | #if defined(TARGET_I386) |
858693c6 | 428 | env->eip = addr; |
5be1a8e0 | 429 | #elif defined (TARGET_PPC) |
858693c6 | 430 | env->nip = addr; |
8d5f07fa FB |
431 | #elif defined (TARGET_SPARC) |
432 | env->pc = addr; | |
433 | env->npc = addr + 4; | |
4c3a88a2 | 434 | #endif |
858693c6 | 435 | } |
41625033 FB |
436 | #ifdef CONFIG_USER_ONLY |
437 | s->running_state = 1; | |
438 | #else | |
439 | vm_start(); | |
440 | #endif | |
441 | return RS_IDLE; | |
858693c6 FB |
442 | case 's': |
443 | if (*p != '\0') { | |
444 | addr = strtoul(p, (char **)&p, 16); | |
c33a346e | 445 | #if defined(TARGET_I386) |
858693c6 | 446 | env->eip = addr; |
5be1a8e0 | 447 | #elif defined (TARGET_PPC) |
858693c6 | 448 | env->nip = addr; |
8d5f07fa FB |
449 | #elif defined (TARGET_SPARC) |
450 | env->pc = addr; | |
451 | env->npc = addr + 4; | |
c33a346e | 452 | #endif |
858693c6 FB |
453 | } |
454 | cpu_single_step(env, 1); | |
41625033 FB |
455 | #ifdef CONFIG_USER_ONLY |
456 | s->running_state = 1; | |
457 | #else | |
458 | vm_start(); | |
459 | #endif | |
460 | return RS_IDLE; | |
858693c6 FB |
461 | case 'g': |
462 | reg_size = cpu_gdb_read_registers(env, mem_buf); | |
463 | memtohex(buf, mem_buf, reg_size); | |
464 | put_packet(s, buf); | |
465 | break; | |
466 | case 'G': | |
467 | registers = (void *)mem_buf; | |
468 | len = strlen(p) / 2; | |
469 | hextomem((uint8_t *)registers, p, len); | |
470 | cpu_gdb_write_registers(env, mem_buf, len); | |
471 | put_packet(s, "OK"); | |
472 | break; | |
473 | case 'm': | |
474 | addr = strtoul(p, (char **)&p, 16); | |
475 | if (*p == ',') | |
476 | p++; | |
477 | len = strtoul(p, NULL, 16); | |
478 | if (cpu_memory_rw_debug(env, addr, mem_buf, len, 0) != 0) | |
479 | memset(mem_buf, 0, len); | |
480 | memtohex(buf, mem_buf, len); | |
481 | put_packet(s, buf); | |
482 | break; | |
483 | case 'M': | |
484 | addr = strtoul(p, (char **)&p, 16); | |
485 | if (*p == ',') | |
486 | p++; | |
487 | len = strtoul(p, (char **)&p, 16); | |
b328f873 | 488 | if (*p == ':') |
858693c6 FB |
489 | p++; |
490 | hextomem(mem_buf, p, len); | |
491 | if (cpu_memory_rw_debug(env, addr, mem_buf, len, 1) != 0) | |
905f20b1 | 492 | put_packet(s, "E14"); |
858693c6 FB |
493 | else |
494 | put_packet(s, "OK"); | |
495 | break; | |
496 | case 'Z': | |
497 | type = strtoul(p, (char **)&p, 16); | |
498 | if (*p == ',') | |
499 | p++; | |
500 | addr = strtoul(p, (char **)&p, 16); | |
501 | if (*p == ',') | |
502 | p++; | |
503 | len = strtoul(p, (char **)&p, 16); | |
504 | if (type == 0 || type == 1) { | |
505 | if (cpu_breakpoint_insert(env, addr) < 0) | |
506 | goto breakpoint_error; | |
507 | put_packet(s, "OK"); | |
508 | } else { | |
509 | breakpoint_error: | |
905f20b1 | 510 | put_packet(s, "E22"); |
858693c6 FB |
511 | } |
512 | break; | |
513 | case 'z': | |
514 | type = strtoul(p, (char **)&p, 16); | |
515 | if (*p == ',') | |
516 | p++; | |
517 | addr = strtoul(p, (char **)&p, 16); | |
518 | if (*p == ',') | |
519 | p++; | |
520 | len = strtoul(p, (char **)&p, 16); | |
521 | if (type == 0 || type == 1) { | |
522 | cpu_breakpoint_remove(env, addr); | |
523 | put_packet(s, "OK"); | |
524 | } else { | |
525 | goto breakpoint_error; | |
526 | } | |
527 | break; | |
528 | default: | |
529 | // unknown_command: | |
530 | /* put empty packet */ | |
531 | buf[0] = '\0'; | |
532 | put_packet(s, buf); | |
533 | break; | |
534 | } | |
535 | return RS_IDLE; | |
536 | } | |
537 | ||
612458f5 FB |
538 | extern void tb_flush(CPUState *env); |
539 | ||
1fddef4b | 540 | #ifndef CONFIG_USER_ONLY |
858693c6 FB |
541 | static void gdb_vm_stopped(void *opaque, int reason) |
542 | { | |
543 | GDBState *s = opaque; | |
544 | char buf[256]; | |
545 | int ret; | |
546 | ||
547 | /* disable single step if it was enable */ | |
548 | cpu_single_step(cpu_single_env, 0); | |
549 | ||
e80cfcfc FB |
550 | if (reason == EXCP_DEBUG) { |
551 | tb_flush(cpu_single_env); | |
858693c6 | 552 | ret = SIGTRAP; |
e80cfcfc | 553 | } |
858693c6 FB |
554 | else |
555 | ret = 0; | |
556 | snprintf(buf, sizeof(buf), "S%02x", ret); | |
557 | put_packet(s, buf); | |
558 | } | |
1fddef4b | 559 | #endif |
858693c6 | 560 | |
1fddef4b | 561 | static void gdb_read_byte(GDBState *s, CPUState *env, int ch) |
858693c6 FB |
562 | { |
563 | int i, csum; | |
564 | char reply[1]; | |
565 | ||
1fddef4b | 566 | #ifndef CONFIG_USER_ONLY |
858693c6 FB |
567 | if (vm_running) { |
568 | /* when the CPU is running, we cannot do anything except stop | |
569 | it when receiving a char */ | |
570 | vm_stop(EXCP_INTERRUPT); | |
41625033 | 571 | } else |
1fddef4b | 572 | #endif |
41625033 | 573 | { |
858693c6 FB |
574 | switch(s->state) { |
575 | case RS_IDLE: | |
576 | if (ch == '$') { | |
577 | s->line_buf_index = 0; | |
578 | s->state = RS_GETLINE; | |
c33a346e | 579 | } |
b4608c04 | 580 | break; |
858693c6 FB |
581 | case RS_GETLINE: |
582 | if (ch == '#') { | |
583 | s->state = RS_CHKSUM1; | |
584 | } else if (s->line_buf_index >= sizeof(s->line_buf) - 1) { | |
585 | s->state = RS_IDLE; | |
4c3a88a2 | 586 | } else { |
858693c6 | 587 | s->line_buf[s->line_buf_index++] = ch; |
4c3a88a2 FB |
588 | } |
589 | break; | |
858693c6 FB |
590 | case RS_CHKSUM1: |
591 | s->line_buf[s->line_buf_index] = '\0'; | |
592 | s->line_csum = fromhex(ch) << 4; | |
593 | s->state = RS_CHKSUM2; | |
594 | break; | |
595 | case RS_CHKSUM2: | |
596 | s->line_csum |= fromhex(ch); | |
597 | csum = 0; | |
598 | for(i = 0; i < s->line_buf_index; i++) { | |
599 | csum += s->line_buf[i]; | |
600 | } | |
601 | if (s->line_csum != (csum & 0xff)) { | |
602 | reply[0] = '-'; | |
603 | put_buffer(s, reply, 1); | |
604 | s->state = RS_IDLE; | |
4c3a88a2 | 605 | } else { |
858693c6 FB |
606 | reply[0] = '+'; |
607 | put_buffer(s, reply, 1); | |
1fddef4b | 608 | s->state = gdb_handle_packet(s, env, s->line_buf); |
4c3a88a2 FB |
609 | } |
610 | break; | |
858693c6 FB |
611 | } |
612 | } | |
613 | } | |
614 | ||
1fddef4b FB |
615 | #ifdef CONFIG_USER_ONLY |
616 | int | |
617 | gdb_handlesig (CPUState *env, int sig) | |
618 | { | |
619 | GDBState *s; | |
620 | char buf[256]; | |
621 | int n; | |
622 | ||
623 | if (gdbserver_fd < 0) | |
624 | return sig; | |
625 | ||
626 | s = &gdbserver_state; | |
627 | ||
628 | /* disable single step if it was enabled */ | |
629 | cpu_single_step(env, 0); | |
630 | tb_flush(env); | |
631 | ||
632 | if (sig != 0) | |
633 | { | |
634 | snprintf(buf, sizeof(buf), "S%02x", sig); | |
635 | put_packet(s, buf); | |
636 | } | |
637 | ||
1fddef4b FB |
638 | sig = 0; |
639 | s->state = RS_IDLE; | |
41625033 FB |
640 | s->running_state = 0; |
641 | while (s->running_state == 0) { | |
1fddef4b FB |
642 | n = read (s->fd, buf, 256); |
643 | if (n > 0) | |
644 | { | |
645 | int i; | |
646 | ||
647 | for (i = 0; i < n; i++) | |
648 | gdb_read_byte (s, env, buf[i]); | |
649 | } | |
650 | else if (n == 0 || errno != EAGAIN) | |
651 | { | |
652 | /* XXX: Connection closed. Should probably wait for annother | |
653 | connection before continuing. */ | |
654 | return sig; | |
655 | } | |
41625033 | 656 | } |
1fddef4b FB |
657 | return sig; |
658 | } | |
e9009676 FB |
659 | |
660 | /* Tell the remote gdb that the process has exited. */ | |
661 | void gdb_exit(CPUState *env, int code) | |
662 | { | |
663 | GDBState *s; | |
664 | char buf[4]; | |
665 | ||
666 | if (gdbserver_fd < 0) | |
667 | return; | |
668 | ||
669 | s = &gdbserver_state; | |
670 | ||
671 | snprintf(buf, sizeof(buf), "W%02x", code); | |
672 | put_packet(s, buf); | |
673 | } | |
674 | ||
1fddef4b | 675 | #else |
858693c6 FB |
676 | static int gdb_can_read(void *opaque) |
677 | { | |
678 | return 256; | |
679 | } | |
680 | ||
681 | static void gdb_read(void *opaque, const uint8_t *buf, int size) | |
682 | { | |
683 | GDBState *s = opaque; | |
684 | int i; | |
685 | if (size == 0) { | |
686 | /* end of connection */ | |
687 | qemu_del_vm_stop_handler(gdb_vm_stopped, s); | |
688 | qemu_del_fd_read_handler(s->fd); | |
689 | qemu_free(s); | |
690 | vm_start(); | |
691 | } else { | |
692 | for(i = 0; i < size; i++) | |
1fddef4b | 693 | gdb_read_byte(s, cpu_single_env, buf[i]); |
858693c6 FB |
694 | } |
695 | } | |
696 | ||
1fddef4b FB |
697 | #endif |
698 | ||
858693c6 FB |
699 | static void gdb_accept(void *opaque, const uint8_t *buf, int size) |
700 | { | |
701 | GDBState *s; | |
702 | struct sockaddr_in sockaddr; | |
703 | socklen_t len; | |
704 | int val, fd; | |
705 | ||
706 | for(;;) { | |
707 | len = sizeof(sockaddr); | |
708 | fd = accept(gdbserver_fd, (struct sockaddr *)&sockaddr, &len); | |
709 | if (fd < 0 && errno != EINTR) { | |
710 | perror("accept"); | |
711 | return; | |
712 | } else if (fd >= 0) { | |
b4608c04 FB |
713 | break; |
714 | } | |
715 | } | |
858693c6 FB |
716 | |
717 | /* set short latency */ | |
718 | val = 1; | |
7d3505c5 | 719 | setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val)); |
858693c6 | 720 | |
1fddef4b FB |
721 | #ifdef CONFIG_USER_ONLY |
722 | s = &gdbserver_state; | |
723 | memset (s, 0, sizeof (GDBState)); | |
724 | #else | |
858693c6 FB |
725 | s = qemu_mallocz(sizeof(GDBState)); |
726 | if (!s) { | |
727 | close(fd); | |
728 | return; | |
729 | } | |
1fddef4b | 730 | #endif |
858693c6 FB |
731 | s->fd = fd; |
732 | ||
733 | fcntl(fd, F_SETFL, O_NONBLOCK); | |
734 | ||
1fddef4b | 735 | #ifndef CONFIG_USER_ONLY |
858693c6 FB |
736 | /* stop the VM */ |
737 | vm_stop(EXCP_INTERRUPT); | |
738 | ||
739 | /* start handling I/O */ | |
740 | qemu_add_fd_read_handler(s->fd, gdb_can_read, gdb_read, s); | |
741 | /* when the VM is stopped, the following callback is called */ | |
742 | qemu_add_vm_stop_handler(gdb_vm_stopped, s); | |
1fddef4b | 743 | #endif |
858693c6 FB |
744 | } |
745 | ||
746 | static int gdbserver_open(int port) | |
747 | { | |
748 | struct sockaddr_in sockaddr; | |
749 | int fd, val, ret; | |
750 | ||
751 | fd = socket(PF_INET, SOCK_STREAM, 0); | |
752 | if (fd < 0) { | |
753 | perror("socket"); | |
754 | return -1; | |
755 | } | |
756 | ||
757 | /* allow fast reuse */ | |
758 | val = 1; | |
759 | setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)); | |
760 | ||
761 | sockaddr.sin_family = AF_INET; | |
762 | sockaddr.sin_port = htons(port); | |
763 | sockaddr.sin_addr.s_addr = 0; | |
764 | ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr)); | |
765 | if (ret < 0) { | |
766 | perror("bind"); | |
767 | return -1; | |
768 | } | |
769 | ret = listen(fd, 0); | |
770 | if (ret < 0) { | |
771 | perror("listen"); | |
772 | return -1; | |
773 | } | |
1fddef4b | 774 | #ifndef CONFIG_USER_ONLY |
858693c6 | 775 | fcntl(fd, F_SETFL, O_NONBLOCK); |
1fddef4b | 776 | #endif |
858693c6 FB |
777 | return fd; |
778 | } | |
779 | ||
780 | int gdbserver_start(int port) | |
781 | { | |
782 | gdbserver_fd = gdbserver_open(port); | |
783 | if (gdbserver_fd < 0) | |
784 | return -1; | |
785 | /* accept connections */ | |
1fddef4b FB |
786 | #ifdef CONFIG_USER_ONLY |
787 | gdb_accept (NULL, NULL, 0); | |
788 | #else | |
858693c6 | 789 | qemu_add_fd_read_handler(gdbserver_fd, NULL, gdb_accept, NULL); |
1fddef4b | 790 | #endif |
b4608c04 FB |
791 | return 0; |
792 | } |