4 * Copyright (c) 2003 Fabrice Bellard
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.
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.
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
22 #include <sys/socket.h>
23 #include <netinet/in.h>
24 #include <netinet/tcp.h>
36 static int gdbserver_fd;
38 typedef struct GDBState {
46 static int get_char(GDBState *s)
52 ret = read(s->fd, &ch, 1);
54 if (errno != EINTR && errno != EAGAIN)
56 } else if (ret == 0) {
65 static void put_buffer(GDBState *s, const uint8_t *buf, int len)
70 ret = write(s->fd, buf, len);
72 if (errno != EINTR && errno != EAGAIN)
81 static inline int fromhex(int v)
83 if (v >= '0' && v <= '9')
85 else if (v >= 'A' && v <= 'F')
87 else if (v >= 'a' && v <= 'f')
93 static inline int tohex(int v)
101 static void memtohex(char *buf, const uint8_t *mem, int len)
106 for(i = 0; i < len; i++) {
108 *q++ = tohex(c >> 4);
109 *q++ = tohex(c & 0xf);
114 static void hextomem(uint8_t *mem, const char *buf, int len)
118 for(i = 0; i < len; i++) {
119 mem[i] = (fromhex(buf[0]) << 4) | fromhex(buf[1]);
124 /* return -1 if error, 0 if OK */
125 static int put_packet(GDBState *s, char *buf)
128 int len, csum, ch, i;
131 printf("reply='%s'\n", buf);
136 put_buffer(s, buf1, 1);
138 put_buffer(s, buf, len);
140 for(i = 0; i < len; i++) {
144 buf1[1] = tohex((csum >> 4) & 0xf);
145 buf1[2] = tohex((csum) & 0xf);
147 put_buffer(s, buf1, 3);
158 #if defined(TARGET_I386)
160 static void to_le32(uint8_t *p, int v)
168 static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
172 for(i = 0; i < 8; i++) {
173 to_le32(mem_buf + i * 4, env->regs[i]);
175 to_le32(mem_buf + 8 * 4, env->eip);
176 to_le32(mem_buf + 9 * 4, env->eflags);
177 to_le32(mem_buf + 10 * 4, env->segs[R_CS].selector);
178 to_le32(mem_buf + 11 * 4, env->segs[R_SS].selector);
179 to_le32(mem_buf + 12 * 4, env->segs[R_DS].selector);
180 to_le32(mem_buf + 13 * 4, env->segs[R_ES].selector);
181 to_le32(mem_buf + 14 * 4, env->segs[R_FS].selector);
182 to_le32(mem_buf + 15 * 4, env->segs[R_GS].selector);
183 /* XXX: convert floats */
184 for(i = 0; i < 8; i++) {
185 memcpy(mem_buf + 16 * 4 + i * 10, &env->fpregs[i], 10);
187 to_le32(mem_buf + 36 * 4, env->fpuc);
188 fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
189 to_le32(mem_buf + 37 * 4, fpus);
190 to_le32(mem_buf + 38 * 4, 0); /* XXX: convert tags */
191 to_le32(mem_buf + 39 * 4, 0); /* fiseg */
192 to_le32(mem_buf + 40 * 4, 0); /* fioff */
193 to_le32(mem_buf + 41 * 4, 0); /* foseg */
194 to_le32(mem_buf + 42 * 4, 0); /* fooff */
195 to_le32(mem_buf + 43 * 4, 0); /* fop */
199 static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
201 uint32_t *registers = (uint32_t *)mem_buf;
204 for(i = 0; i < 8; i++) {
205 env->regs[i] = tswapl(registers[i]);
207 env->eip = registers[8];
208 env->eflags = registers[9];
209 #if defined(CONFIG_USER_ONLY)
210 #define LOAD_SEG(index, sreg)\
211 if (tswapl(registers[index]) != env->segs[sreg].selector)\
212 cpu_x86_load_seg(env, sreg, tswapl(registers[index]));
222 #elif defined (TARGET_PPC)
223 static void to_le32(uint8_t *p, int v)
231 static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
237 for(i = 0; i < 8; i++) {
238 to_le32(mem_buf + i * 4, env->gpr[i]);
241 for (i = 0; i < 32; i++) {
242 to_le32(mem_buf + (i * 2) + 32, *((uint32_t *)&env->fpr[i]));
243 to_le32(mem_buf + (i * 2) + 33, *((uint32_t *)&env->fpr[i] + 1));
245 /* nip, msr, ccr, lnk, ctr, xer, mq */
246 to_le32(mem_buf + 96, tswapl(env->nip));
247 to_le32(mem_buf + 97, tswapl(_load_msr()));
248 to_le32(mem_buf + 98, 0);
250 for (i = 0; i < 8; i++)
251 tmp |= env->crf[i] << (32 - (i * 4));
252 to_le32(mem_buf + 98, tmp);
253 to_le32(mem_buf + 99, tswapl(env->lr));
254 to_le32(mem_buf + 100, tswapl(env->ctr));
255 to_le32(mem_buf + 101, tswapl(_load_xer()));
256 to_le32(mem_buf + 102, 0);
261 static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
263 uint32_t *registers = (uint32_t *)mem_buf;
267 for (i = 0; i < 32; i++) {
268 env->gpr[i] = tswapl(registers[i]);
271 for (i = 0; i < 32; i++) {
272 *((uint32_t *)&env->fpr[i]) = tswapl(registers[(i * 2) + 32]);
273 *((uint32_t *)&env->fpr[i] + 1) = tswapl(registers[(i * 2) + 33]);
275 /* nip, msr, ccr, lnk, ctr, xer, mq */
276 env->nip = tswapl(registers[96]);
277 _store_msr(tswapl(registers[97]));
278 registers[98] = tswapl(registers[98]);
279 for (i = 0; i < 8; i++)
280 env->crf[i] = (registers[98] >> (32 - (i * 4))) & 0xF;
281 env->lr = tswapl(registers[99]);
282 env->ctr = tswapl(registers[100]);
283 _store_xer(tswapl(registers[101]));
287 static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
292 static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
298 /* port = 0 means default port */
299 static int gdb_handle_packet(GDBState *s, const char *line_buf)
301 CPUState *env = cpu_single_env;
303 int ch, reg_size, type;
305 uint8_t mem_buf[2000];
310 printf("command='%s'\n", line_buf);
316 snprintf(buf, sizeof(buf), "S%02x", SIGTRAP);
321 addr = strtoul(p, (char **)&p, 16);
322 #if defined(TARGET_I386)
324 #elif defined (TARGET_PPC)
332 addr = strtoul(p, (char **)&p, 16);
333 #if defined(TARGET_I386)
335 #elif defined (TARGET_PPC)
339 cpu_single_step(env, 1);
343 reg_size = cpu_gdb_read_registers(env, mem_buf);
344 memtohex(buf, mem_buf, reg_size);
348 registers = (void *)mem_buf;
350 hextomem((uint8_t *)registers, p, len);
351 cpu_gdb_write_registers(env, mem_buf, len);
355 addr = strtoul(p, (char **)&p, 16);
358 len = strtoul(p, NULL, 16);
359 if (cpu_memory_rw_debug(env, addr, mem_buf, len, 0) != 0)
360 memset(mem_buf, 0, len);
361 memtohex(buf, mem_buf, len);
365 addr = strtoul(p, (char **)&p, 16);
368 len = strtoul(p, (char **)&p, 16);
371 hextomem(mem_buf, p, len);
372 if (cpu_memory_rw_debug(env, addr, mem_buf, len, 1) != 0)
373 put_packet(s, "ENN");
378 type = strtoul(p, (char **)&p, 16);
381 addr = strtoul(p, (char **)&p, 16);
384 len = strtoul(p, (char **)&p, 16);
385 if (type == 0 || type == 1) {
386 if (cpu_breakpoint_insert(env, addr) < 0)
387 goto breakpoint_error;
391 put_packet(s, "ENN");
395 type = strtoul(p, (char **)&p, 16);
398 addr = strtoul(p, (char **)&p, 16);
401 len = strtoul(p, (char **)&p, 16);
402 if (type == 0 || type == 1) {
403 cpu_breakpoint_remove(env, addr);
406 goto breakpoint_error;
411 /* put empty packet */
419 static void gdb_vm_stopped(void *opaque, int reason)
421 GDBState *s = opaque;
425 /* disable single step if it was enable */
426 cpu_single_step(cpu_single_env, 0);
428 if (reason == EXCP_DEBUG)
432 snprintf(buf, sizeof(buf), "S%02x", ret);
436 static void gdb_read_byte(GDBState *s, int ch)
442 /* when the CPU is running, we cannot do anything except stop
443 it when receiving a char */
444 vm_stop(EXCP_INTERRUPT);
449 s->line_buf_index = 0;
450 s->state = RS_GETLINE;
455 s->state = RS_CHKSUM1;
456 } else if (s->line_buf_index >= sizeof(s->line_buf) - 1) {
459 s->line_buf[s->line_buf_index++] = ch;
463 s->line_buf[s->line_buf_index] = '\0';
464 s->line_csum = fromhex(ch) << 4;
465 s->state = RS_CHKSUM2;
468 s->line_csum |= fromhex(ch);
470 for(i = 0; i < s->line_buf_index; i++) {
471 csum += s->line_buf[i];
473 if (s->line_csum != (csum & 0xff)) {
475 put_buffer(s, reply, 1);
479 put_buffer(s, reply, 1);
480 s->state = gdb_handle_packet(s, s->line_buf);
487 static int gdb_can_read(void *opaque)
492 static void gdb_read(void *opaque, const uint8_t *buf, int size)
494 GDBState *s = opaque;
497 /* end of connection */
498 qemu_del_vm_stop_handler(gdb_vm_stopped, s);
499 qemu_del_fd_read_handler(s->fd);
503 for(i = 0; i < size; i++)
504 gdb_read_byte(s, buf[i]);
508 static void gdb_accept(void *opaque, const uint8_t *buf, int size)
511 struct sockaddr_in sockaddr;
516 len = sizeof(sockaddr);
517 fd = accept(gdbserver_fd, (struct sockaddr *)&sockaddr, &len);
518 if (fd < 0 && errno != EINTR) {
521 } else if (fd >= 0) {
526 /* set short latency */
528 setsockopt(fd, SOL_TCP, TCP_NODELAY, &val, sizeof(val));
530 s = qemu_mallocz(sizeof(GDBState));
537 fcntl(fd, F_SETFL, O_NONBLOCK);
540 vm_stop(EXCP_INTERRUPT);
542 /* start handling I/O */
543 qemu_add_fd_read_handler(s->fd, gdb_can_read, gdb_read, s);
544 /* when the VM is stopped, the following callback is called */
545 qemu_add_vm_stop_handler(gdb_vm_stopped, s);
548 static int gdbserver_open(int port)
550 struct sockaddr_in sockaddr;
553 fd = socket(PF_INET, SOCK_STREAM, 0);
559 /* allow fast reuse */
561 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
563 sockaddr.sin_family = AF_INET;
564 sockaddr.sin_port = htons(port);
565 sockaddr.sin_addr.s_addr = 0;
566 ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr));
576 fcntl(fd, F_SETFL, O_NONBLOCK);
580 int gdbserver_start(int port)
582 gdbserver_fd = gdbserver_open(port);
583 if (gdbserver_fd < 0)
585 /* accept connections */
586 qemu_add_fd_read_handler(gdbserver_fd, NULL, gdb_accept, NULL);