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b4608c04 FB |
1 | /* |
2 | * gdb server stub | |
3 | * | |
3475187d | 4 | * Copyright (c) 2003-2005 Fabrice Bellard |
b4608c04 FB |
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 | 255 | registers[96] = tswapl(env->nip); |
3fc6c082 | 256 | registers[97] = tswapl(do_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); | |
3fc6c082 | 263 | registers[101] = tswapl(do_load_xer(env)); |
e95c8d51 | 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 | 284 | env->nip = tswapl(registers[96]); |
3fc6c082 | 285 | do_store_msr(env, tswapl(registers[97])); |
e95c8d51 | 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]); | |
3fc6c082 | 291 | do_store_xer(env, tswapl(registers[101])); |
e95c8d51 FB |
292 | } |
293 | #elif defined (TARGET_SPARC) | |
294 | static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) | |
295 | { | |
3475187d | 296 | target_ulong *registers = (target_ulong *)mem_buf; |
e95c8d51 FB |
297 | int i; |
298 | ||
299 | /* fill in g0..g7 */ | |
48b2c193 | 300 | for(i = 0; i < 8; i++) { |
e95c8d51 FB |
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 | } | |
3475187d | 311 | #ifndef TARGET_SPARC64 |
e95c8d51 FB |
312 | /* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */ |
313 | registers[64] = tswapl(env->y); | |
3475187d FB |
314 | { |
315 | target_ulong tmp; | |
316 | ||
317 | tmp = GET_PSR(env); | |
318 | registers[65] = tswapl(tmp); | |
319 | } | |
e95c8d51 FB |
320 | registers[66] = tswapl(env->wim); |
321 | registers[67] = tswapl(env->tbr); | |
322 | registers[68] = tswapl(env->pc); | |
323 | registers[69] = tswapl(env->npc); | |
324 | registers[70] = tswapl(env->fsr); | |
325 | registers[71] = 0; /* csr */ | |
326 | registers[72] = 0; | |
3475187d FB |
327 | return 73 * sizeof(target_ulong); |
328 | #else | |
329 | for (i = 0; i < 32; i += 2) { | |
330 | registers[i/2 + 64] = tswapl(*((uint64_t *)&env->fpr[i])); | |
331 | } | |
332 | registers[81] = tswapl(env->pc); | |
333 | registers[82] = tswapl(env->npc); | |
334 | registers[83] = tswapl(env->tstate[env->tl]); | |
335 | registers[84] = tswapl(env->fsr); | |
336 | registers[85] = tswapl(env->fprs); | |
337 | registers[86] = tswapl(env->y); | |
338 | return 87 * sizeof(target_ulong); | |
339 | #endif | |
e95c8d51 FB |
340 | } |
341 | ||
342 | static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) | |
343 | { | |
3475187d | 344 | target_ulong *registers = (target_ulong *)mem_buf; |
e95c8d51 FB |
345 | int i; |
346 | ||
347 | /* fill in g0..g7 */ | |
348 | for(i = 0; i < 7; i++) { | |
349 | env->gregs[i] = tswapl(registers[i]); | |
350 | } | |
351 | /* fill in register window */ | |
352 | for(i = 0; i < 24; i++) { | |
3475187d | 353 | env->regwptr[i] = tswapl(registers[i + 8]); |
e95c8d51 FB |
354 | } |
355 | /* fill in fprs */ | |
356 | for (i = 0; i < 32; i++) { | |
357 | *((uint32_t *)&env->fpr[i]) = tswapl(registers[i + 32]); | |
358 | } | |
3475187d | 359 | #ifndef TARGET_SPARC64 |
e95c8d51 FB |
360 | /* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */ |
361 | env->y = tswapl(registers[64]); | |
e80cfcfc | 362 | PUT_PSR(env, tswapl(registers[65])); |
e95c8d51 FB |
363 | env->wim = tswapl(registers[66]); |
364 | env->tbr = tswapl(registers[67]); | |
365 | env->pc = tswapl(registers[68]); | |
366 | env->npc = tswapl(registers[69]); | |
367 | env->fsr = tswapl(registers[70]); | |
3475187d FB |
368 | #else |
369 | for (i = 0; i < 32; i += 2) { | |
370 | uint64_t tmp; | |
371 | tmp = tswapl(registers[i/2 + 64]) << 32; | |
372 | tmp |= tswapl(registers[i/2 + 64 + 1]); | |
373 | *((uint64_t *)&env->fpr[i]) = tmp; | |
374 | } | |
375 | env->pc = tswapl(registers[81]); | |
376 | env->npc = tswapl(registers[82]); | |
377 | env->tstate[env->tl] = tswapl(registers[83]); | |
378 | env->fsr = tswapl(registers[84]); | |
379 | env->fprs = tswapl(registers[85]); | |
380 | env->y = tswapl(registers[86]); | |
381 | #endif | |
9e62fd7f | 382 | } |
1fddef4b FB |
383 | #elif defined (TARGET_ARM) |
384 | static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) | |
385 | { | |
386 | int i; | |
387 | uint8_t *ptr; | |
388 | ||
389 | ptr = mem_buf; | |
390 | /* 16 core integer registers (4 bytes each). */ | |
391 | for (i = 0; i < 16; i++) | |
392 | { | |
393 | *(uint32_t *)ptr = tswapl(env->regs[i]); | |
394 | ptr += 4; | |
395 | } | |
396 | /* 8 FPA registers (12 bytes each), FPS (4 bytes). | |
397 | Not yet implemented. */ | |
398 | memset (ptr, 0, 8 * 12 + 4); | |
399 | ptr += 8 * 12 + 4; | |
400 | /* CPSR (4 bytes). */ | |
401 | *(uint32_t *)ptr = tswapl (env->cpsr); | |
402 | ptr += 4; | |
403 | ||
404 | return ptr - mem_buf; | |
405 | } | |
6da41eaf | 406 | |
1fddef4b FB |
407 | static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) |
408 | { | |
409 | int i; | |
410 | uint8_t *ptr; | |
411 | ||
412 | ptr = mem_buf; | |
413 | /* Core integer registers. */ | |
414 | for (i = 0; i < 16; i++) | |
415 | { | |
416 | env->regs[i] = tswapl(*(uint32_t *)ptr); | |
417 | ptr += 4; | |
418 | } | |
419 | /* Ignore FPA regs and scr. */ | |
420 | ptr += 8 * 12 + 4; | |
421 | env->cpsr = tswapl(*(uint32_t *)ptr); | |
422 | } | |
423 | #else | |
6da41eaf FB |
424 | static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf) |
425 | { | |
426 | return 0; | |
427 | } | |
428 | ||
429 | static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size) | |
430 | { | |
431 | } | |
432 | ||
433 | #endif | |
b4608c04 | 434 | |
1fddef4b | 435 | static int gdb_handle_packet(GDBState *s, CPUState *env, const char *line_buf) |
b4608c04 | 436 | { |
b4608c04 | 437 | const char *p; |
858693c6 | 438 | int ch, reg_size, type; |
b4608c04 FB |
439 | char buf[4096]; |
440 | uint8_t mem_buf[2000]; | |
441 | uint32_t *registers; | |
442 | uint32_t addr, len; | |
443 | ||
858693c6 FB |
444 | #ifdef DEBUG_GDB |
445 | printf("command='%s'\n", line_buf); | |
446 | #endif | |
447 | p = line_buf; | |
448 | ch = *p++; | |
449 | switch(ch) { | |
450 | case '?': | |
1fddef4b | 451 | /* TODO: Make this return the correct value for user-mode. */ |
858693c6 FB |
452 | snprintf(buf, sizeof(buf), "S%02x", SIGTRAP); |
453 | put_packet(s, buf); | |
454 | break; | |
455 | case 'c': | |
456 | if (*p != '\0') { | |
457 | addr = strtoul(p, (char **)&p, 16); | |
4c3a88a2 | 458 | #if defined(TARGET_I386) |
858693c6 | 459 | env->eip = addr; |
5be1a8e0 | 460 | #elif defined (TARGET_PPC) |
858693c6 | 461 | env->nip = addr; |
8d5f07fa FB |
462 | #elif defined (TARGET_SPARC) |
463 | env->pc = addr; | |
464 | env->npc = addr + 4; | |
4c3a88a2 | 465 | #endif |
858693c6 | 466 | } |
41625033 FB |
467 | #ifdef CONFIG_USER_ONLY |
468 | s->running_state = 1; | |
469 | #else | |
470 | vm_start(); | |
471 | #endif | |
472 | return RS_IDLE; | |
858693c6 FB |
473 | case 's': |
474 | if (*p != '\0') { | |
475 | addr = strtoul(p, (char **)&p, 16); | |
c33a346e | 476 | #if defined(TARGET_I386) |
858693c6 | 477 | env->eip = addr; |
5be1a8e0 | 478 | #elif defined (TARGET_PPC) |
858693c6 | 479 | env->nip = addr; |
8d5f07fa FB |
480 | #elif defined (TARGET_SPARC) |
481 | env->pc = addr; | |
482 | env->npc = addr + 4; | |
c33a346e | 483 | #endif |
858693c6 FB |
484 | } |
485 | cpu_single_step(env, 1); | |
41625033 FB |
486 | #ifdef CONFIG_USER_ONLY |
487 | s->running_state = 1; | |
488 | #else | |
489 | vm_start(); | |
490 | #endif | |
491 | return RS_IDLE; | |
858693c6 FB |
492 | case 'g': |
493 | reg_size = cpu_gdb_read_registers(env, mem_buf); | |
494 | memtohex(buf, mem_buf, reg_size); | |
495 | put_packet(s, buf); | |
496 | break; | |
497 | case 'G': | |
498 | registers = (void *)mem_buf; | |
499 | len = strlen(p) / 2; | |
500 | hextomem((uint8_t *)registers, p, len); | |
501 | cpu_gdb_write_registers(env, mem_buf, len); | |
502 | put_packet(s, "OK"); | |
503 | break; | |
504 | case 'm': | |
505 | addr = strtoul(p, (char **)&p, 16); | |
506 | if (*p == ',') | |
507 | p++; | |
508 | len = strtoul(p, NULL, 16); | |
509 | if (cpu_memory_rw_debug(env, addr, mem_buf, len, 0) != 0) | |
510 | memset(mem_buf, 0, len); | |
511 | memtohex(buf, mem_buf, len); | |
512 | put_packet(s, buf); | |
513 | break; | |
514 | case 'M': | |
515 | addr = strtoul(p, (char **)&p, 16); | |
516 | if (*p == ',') | |
517 | p++; | |
518 | len = strtoul(p, (char **)&p, 16); | |
b328f873 | 519 | if (*p == ':') |
858693c6 FB |
520 | p++; |
521 | hextomem(mem_buf, p, len); | |
522 | if (cpu_memory_rw_debug(env, addr, mem_buf, len, 1) != 0) | |
905f20b1 | 523 | put_packet(s, "E14"); |
858693c6 FB |
524 | else |
525 | put_packet(s, "OK"); | |
526 | break; | |
527 | case 'Z': | |
528 | type = strtoul(p, (char **)&p, 16); | |
529 | if (*p == ',') | |
530 | p++; | |
531 | addr = strtoul(p, (char **)&p, 16); | |
532 | if (*p == ',') | |
533 | p++; | |
534 | len = strtoul(p, (char **)&p, 16); | |
535 | if (type == 0 || type == 1) { | |
536 | if (cpu_breakpoint_insert(env, addr) < 0) | |
537 | goto breakpoint_error; | |
538 | put_packet(s, "OK"); | |
539 | } else { | |
540 | breakpoint_error: | |
905f20b1 | 541 | put_packet(s, "E22"); |
858693c6 FB |
542 | } |
543 | break; | |
544 | case 'z': | |
545 | type = strtoul(p, (char **)&p, 16); | |
546 | if (*p == ',') | |
547 | p++; | |
548 | addr = strtoul(p, (char **)&p, 16); | |
549 | if (*p == ',') | |
550 | p++; | |
551 | len = strtoul(p, (char **)&p, 16); | |
552 | if (type == 0 || type == 1) { | |
553 | cpu_breakpoint_remove(env, addr); | |
554 | put_packet(s, "OK"); | |
555 | } else { | |
556 | goto breakpoint_error; | |
557 | } | |
558 | break; | |
559 | default: | |
560 | // unknown_command: | |
561 | /* put empty packet */ | |
562 | buf[0] = '\0'; | |
563 | put_packet(s, buf); | |
564 | break; | |
565 | } | |
566 | return RS_IDLE; | |
567 | } | |
568 | ||
612458f5 FB |
569 | extern void tb_flush(CPUState *env); |
570 | ||
1fddef4b | 571 | #ifndef CONFIG_USER_ONLY |
858693c6 FB |
572 | static void gdb_vm_stopped(void *opaque, int reason) |
573 | { | |
574 | GDBState *s = opaque; | |
575 | char buf[256]; | |
576 | int ret; | |
577 | ||
578 | /* disable single step if it was enable */ | |
579 | cpu_single_step(cpu_single_env, 0); | |
580 | ||
e80cfcfc FB |
581 | if (reason == EXCP_DEBUG) { |
582 | tb_flush(cpu_single_env); | |
858693c6 | 583 | ret = SIGTRAP; |
e80cfcfc | 584 | } |
858693c6 FB |
585 | else |
586 | ret = 0; | |
587 | snprintf(buf, sizeof(buf), "S%02x", ret); | |
588 | put_packet(s, buf); | |
589 | } | |
1fddef4b | 590 | #endif |
858693c6 | 591 | |
1fddef4b | 592 | static void gdb_read_byte(GDBState *s, CPUState *env, int ch) |
858693c6 FB |
593 | { |
594 | int i, csum; | |
595 | char reply[1]; | |
596 | ||
1fddef4b | 597 | #ifndef CONFIG_USER_ONLY |
858693c6 FB |
598 | if (vm_running) { |
599 | /* when the CPU is running, we cannot do anything except stop | |
600 | it when receiving a char */ | |
601 | vm_stop(EXCP_INTERRUPT); | |
41625033 | 602 | } else |
1fddef4b | 603 | #endif |
41625033 | 604 | { |
858693c6 FB |
605 | switch(s->state) { |
606 | case RS_IDLE: | |
607 | if (ch == '$') { | |
608 | s->line_buf_index = 0; | |
609 | s->state = RS_GETLINE; | |
c33a346e | 610 | } |
b4608c04 | 611 | break; |
858693c6 FB |
612 | case RS_GETLINE: |
613 | if (ch == '#') { | |
614 | s->state = RS_CHKSUM1; | |
615 | } else if (s->line_buf_index >= sizeof(s->line_buf) - 1) { | |
616 | s->state = RS_IDLE; | |
4c3a88a2 | 617 | } else { |
858693c6 | 618 | s->line_buf[s->line_buf_index++] = ch; |
4c3a88a2 FB |
619 | } |
620 | break; | |
858693c6 FB |
621 | case RS_CHKSUM1: |
622 | s->line_buf[s->line_buf_index] = '\0'; | |
623 | s->line_csum = fromhex(ch) << 4; | |
624 | s->state = RS_CHKSUM2; | |
625 | break; | |
626 | case RS_CHKSUM2: | |
627 | s->line_csum |= fromhex(ch); | |
628 | csum = 0; | |
629 | for(i = 0; i < s->line_buf_index; i++) { | |
630 | csum += s->line_buf[i]; | |
631 | } | |
632 | if (s->line_csum != (csum & 0xff)) { | |
633 | reply[0] = '-'; | |
634 | put_buffer(s, reply, 1); | |
635 | s->state = RS_IDLE; | |
4c3a88a2 | 636 | } else { |
858693c6 FB |
637 | reply[0] = '+'; |
638 | put_buffer(s, reply, 1); | |
1fddef4b | 639 | s->state = gdb_handle_packet(s, env, s->line_buf); |
4c3a88a2 FB |
640 | } |
641 | break; | |
858693c6 FB |
642 | } |
643 | } | |
644 | } | |
645 | ||
1fddef4b FB |
646 | #ifdef CONFIG_USER_ONLY |
647 | int | |
648 | gdb_handlesig (CPUState *env, int sig) | |
649 | { | |
650 | GDBState *s; | |
651 | char buf[256]; | |
652 | int n; | |
653 | ||
654 | if (gdbserver_fd < 0) | |
655 | return sig; | |
656 | ||
657 | s = &gdbserver_state; | |
658 | ||
659 | /* disable single step if it was enabled */ | |
660 | cpu_single_step(env, 0); | |
661 | tb_flush(env); | |
662 | ||
663 | if (sig != 0) | |
664 | { | |
665 | snprintf(buf, sizeof(buf), "S%02x", sig); | |
666 | put_packet(s, buf); | |
667 | } | |
668 | ||
1fddef4b FB |
669 | sig = 0; |
670 | s->state = RS_IDLE; | |
41625033 FB |
671 | s->running_state = 0; |
672 | while (s->running_state == 0) { | |
1fddef4b FB |
673 | n = read (s->fd, buf, 256); |
674 | if (n > 0) | |
675 | { | |
676 | int i; | |
677 | ||
678 | for (i = 0; i < n; i++) | |
679 | gdb_read_byte (s, env, buf[i]); | |
680 | } | |
681 | else if (n == 0 || errno != EAGAIN) | |
682 | { | |
683 | /* XXX: Connection closed. Should probably wait for annother | |
684 | connection before continuing. */ | |
685 | return sig; | |
686 | } | |
41625033 | 687 | } |
1fddef4b FB |
688 | return sig; |
689 | } | |
e9009676 FB |
690 | |
691 | /* Tell the remote gdb that the process has exited. */ | |
692 | void gdb_exit(CPUState *env, int code) | |
693 | { | |
694 | GDBState *s; | |
695 | char buf[4]; | |
696 | ||
697 | if (gdbserver_fd < 0) | |
698 | return; | |
699 | ||
700 | s = &gdbserver_state; | |
701 | ||
702 | snprintf(buf, sizeof(buf), "W%02x", code); | |
703 | put_packet(s, buf); | |
704 | } | |
705 | ||
1fddef4b | 706 | #else |
858693c6 FB |
707 | static int gdb_can_read(void *opaque) |
708 | { | |
709 | return 256; | |
710 | } | |
711 | ||
712 | static void gdb_read(void *opaque, const uint8_t *buf, int size) | |
713 | { | |
714 | GDBState *s = opaque; | |
715 | int i; | |
716 | if (size == 0) { | |
717 | /* end of connection */ | |
718 | qemu_del_vm_stop_handler(gdb_vm_stopped, s); | |
719 | qemu_del_fd_read_handler(s->fd); | |
720 | qemu_free(s); | |
721 | vm_start(); | |
722 | } else { | |
723 | for(i = 0; i < size; i++) | |
1fddef4b | 724 | gdb_read_byte(s, cpu_single_env, buf[i]); |
858693c6 FB |
725 | } |
726 | } | |
727 | ||
1fddef4b FB |
728 | #endif |
729 | ||
858693c6 FB |
730 | static void gdb_accept(void *opaque, const uint8_t *buf, int size) |
731 | { | |
732 | GDBState *s; | |
733 | struct sockaddr_in sockaddr; | |
734 | socklen_t len; | |
735 | int val, fd; | |
736 | ||
737 | for(;;) { | |
738 | len = sizeof(sockaddr); | |
739 | fd = accept(gdbserver_fd, (struct sockaddr *)&sockaddr, &len); | |
740 | if (fd < 0 && errno != EINTR) { | |
741 | perror("accept"); | |
742 | return; | |
743 | } else if (fd >= 0) { | |
b4608c04 FB |
744 | break; |
745 | } | |
746 | } | |
858693c6 FB |
747 | |
748 | /* set short latency */ | |
749 | val = 1; | |
7d3505c5 | 750 | setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val)); |
858693c6 | 751 | |
1fddef4b FB |
752 | #ifdef CONFIG_USER_ONLY |
753 | s = &gdbserver_state; | |
754 | memset (s, 0, sizeof (GDBState)); | |
755 | #else | |
858693c6 FB |
756 | s = qemu_mallocz(sizeof(GDBState)); |
757 | if (!s) { | |
758 | close(fd); | |
759 | return; | |
760 | } | |
1fddef4b | 761 | #endif |
858693c6 FB |
762 | s->fd = fd; |
763 | ||
764 | fcntl(fd, F_SETFL, O_NONBLOCK); | |
765 | ||
1fddef4b | 766 | #ifndef CONFIG_USER_ONLY |
858693c6 FB |
767 | /* stop the VM */ |
768 | vm_stop(EXCP_INTERRUPT); | |
769 | ||
770 | /* start handling I/O */ | |
771 | qemu_add_fd_read_handler(s->fd, gdb_can_read, gdb_read, s); | |
772 | /* when the VM is stopped, the following callback is called */ | |
773 | qemu_add_vm_stop_handler(gdb_vm_stopped, s); | |
1fddef4b | 774 | #endif |
858693c6 FB |
775 | } |
776 | ||
777 | static int gdbserver_open(int port) | |
778 | { | |
779 | struct sockaddr_in sockaddr; | |
780 | int fd, val, ret; | |
781 | ||
782 | fd = socket(PF_INET, SOCK_STREAM, 0); | |
783 | if (fd < 0) { | |
784 | perror("socket"); | |
785 | return -1; | |
786 | } | |
787 | ||
788 | /* allow fast reuse */ | |
789 | val = 1; | |
790 | setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)); | |
791 | ||
792 | sockaddr.sin_family = AF_INET; | |
793 | sockaddr.sin_port = htons(port); | |
794 | sockaddr.sin_addr.s_addr = 0; | |
795 | ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr)); | |
796 | if (ret < 0) { | |
797 | perror("bind"); | |
798 | return -1; | |
799 | } | |
800 | ret = listen(fd, 0); | |
801 | if (ret < 0) { | |
802 | perror("listen"); | |
803 | return -1; | |
804 | } | |
1fddef4b | 805 | #ifndef CONFIG_USER_ONLY |
858693c6 | 806 | fcntl(fd, F_SETFL, O_NONBLOCK); |
1fddef4b | 807 | #endif |
858693c6 FB |
808 | return fd; |
809 | } | |
810 | ||
811 | int gdbserver_start(int port) | |
812 | { | |
813 | gdbserver_fd = gdbserver_open(port); | |
814 | if (gdbserver_fd < 0) | |
815 | return -1; | |
816 | /* accept connections */ | |
1fddef4b FB |
817 | #ifdef CONFIG_USER_ONLY |
818 | gdb_accept (NULL, NULL, 0); | |
819 | #else | |
858693c6 | 820 | qemu_add_fd_read_handler(gdbserver_fd, NULL, gdb_accept, NULL); |
1fddef4b | 821 | #endif |
b4608c04 FB |
822 | return 0; |
823 | } |