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
25 #include <sys/socket.h>
26 #include <netinet/in.h>
27 #include <netinet/tcp.h>
38 static int gdbstub_open(int port)
40 struct sockaddr_in sockaddr;
44 fd = socket(PF_INET, SOCK_STREAM, 0);
50 /* allow fast reuse */
52 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
54 sockaddr.sin_family = AF_INET;
55 sockaddr.sin_port = htons(port);
56 sockaddr.sin_addr.s_addr = 0;
57 ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr));
68 /* now wait for one connection */
70 len = sizeof(sockaddr);
71 gdbstub_fd = accept(fd, (struct sockaddr *)&sockaddr, &len);
72 if (gdbstub_fd < 0 && errno != EINTR) {
75 } else if (gdbstub_fd >= 0) {
80 /* set short latency */
82 setsockopt(gdbstub_fd, SOL_TCP, TCP_NODELAY, &val, sizeof(val));
86 static int get_char(void)
92 ret = read(gdbstub_fd, &ch, 1);
94 if (errno != EINTR && errno != EAGAIN)
96 } else if (ret == 0) {
105 static void put_buffer(const uint8_t *buf, int len)
110 ret = write(gdbstub_fd, buf, len);
112 if (errno != EINTR && errno != EAGAIN)
121 static inline int fromhex(int v)
123 if (v >= '0' && v <= '9')
125 else if (v >= 'A' && v <= 'F')
127 else if (v >= 'a' && v <= 'f')
133 static inline int tohex(int v)
141 static void memtohex(char *buf, const uint8_t *mem, int len)
146 for(i = 0; i < len; i++) {
148 *q++ = tohex(c >> 4);
149 *q++ = tohex(c & 0xf);
154 static void hextomem(uint8_t *mem, const char *buf, int len)
158 for(i = 0; i < len; i++) {
159 mem[i] = (fromhex(buf[0]) << 4) | fromhex(buf[1]);
164 /* return -1 if error or EOF */
165 static int get_packet(char *buf, int buf_size)
167 int ch, len, csum, csum1;
186 if (len > buf_size - 1)
195 csum1 = fromhex(ch) << 4;
199 csum1 |= fromhex(ch);
200 if ((csum & 0xff) != csum1) {
202 put_buffer(reply, 1);
205 put_buffer(reply, 1);
210 printf("command='%s'\n", buf);
215 /* return -1 if error, 0 if OK */
216 static int put_packet(char *buf)
219 int len, csum, ch, i;
222 printf("reply='%s'\n", buf);
229 put_buffer(buf, len);
231 for(i = 0; i < len; i++) {
235 buf1[1] = tohex((csum >> 4) & 0xf);
236 buf1[2] = tohex((csum) & 0xf);
249 #if defined(TARGET_I386)
251 static void to_le32(uint8_t *p, int v)
259 static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
263 for(i = 0; i < 8; i++) {
264 to_le32(mem_buf + i * 4, env->regs[i]);
266 to_le32(mem_buf + 8 * 4, env->eip);
267 to_le32(mem_buf + 9 * 4, env->eflags);
268 to_le32(mem_buf + 10 * 4, env->segs[R_CS].selector);
269 to_le32(mem_buf + 11 * 4, env->segs[R_SS].selector);
270 to_le32(mem_buf + 12 * 4, env->segs[R_DS].selector);
271 to_le32(mem_buf + 13 * 4, env->segs[R_ES].selector);
272 to_le32(mem_buf + 14 * 4, env->segs[R_FS].selector);
273 to_le32(mem_buf + 15 * 4, env->segs[R_GS].selector);
274 /* XXX: convert floats */
275 for(i = 0; i < 8; i++) {
276 memcpy(mem_buf + 16 * 4 + i * 10, &env->fpregs[i], 10);
278 to_le32(mem_buf + 36 * 4, env->fpuc);
279 fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
280 to_le32(mem_buf + 37 * 4, fpus);
281 to_le32(mem_buf + 38 * 4, 0); /* XXX: convert tags */
282 to_le32(mem_buf + 39 * 4, 0); /* fiseg */
283 to_le32(mem_buf + 40 * 4, 0); /* fioff */
284 to_le32(mem_buf + 41 * 4, 0); /* foseg */
285 to_le32(mem_buf + 42 * 4, 0); /* fooff */
286 to_le32(mem_buf + 43 * 4, 0); /* fop */
290 static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
292 uint32_t *registers = (uint32_t *)mem_buf;
295 for(i = 0; i < 8; i++) {
296 env->regs[i] = tswapl(registers[i]);
298 env->eip = registers[8];
299 env->eflags = registers[9];
300 #if defined(CONFIG_USER_ONLY)
301 #define LOAD_SEG(index, sreg)\
302 if (tswapl(registers[index]) != env->segs[sreg].selector)\
303 cpu_x86_load_seg(env, sreg, tswapl(registers[index]));
313 #elif defined (TARGET_PPC)
314 static void to_le32(uint8_t *p, int v)
322 static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
328 for(i = 0; i < 8; i++) {
329 to_le32(mem_buf + i * 4, env->gpr[i]);
332 for (i = 0; i < 32; i++) {
333 to_le32(mem_buf + (i * 2) + 32, *((uint32_t *)&env->fpr[i]));
334 to_le32(mem_buf + (i * 2) + 33, *((uint32_t *)&env->fpr[i] + 1));
336 /* nip, msr, ccr, lnk, ctr, xer, mq */
337 to_le32(mem_buf + 96, tswapl(env->nip));
338 to_le32(mem_buf + 97, tswapl(_load_msr()));
339 to_le32(mem_buf + 98, 0);
341 for (i = 0; i < 8; i++)
342 tmp |= env->crf[i] << (32 - (i * 4));
343 to_le32(mem_buf + 98, tmp);
344 to_le32(mem_buf + 99, tswapl(env->lr));
345 to_le32(mem_buf + 100, tswapl(env->ctr));
346 to_le32(mem_buf + 101, tswapl(_load_xer()));
347 to_le32(mem_buf + 102, 0);
352 static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
354 uint32_t *registers = (uint32_t *)mem_buf;
358 for (i = 0; i < 32; i++) {
359 env->gpr[i] = tswapl(registers[i]);
362 for (i = 0; i < 32; i++) {
363 *((uint32_t *)&env->fpr[i]) = tswapl(registers[(i * 2) + 32]);
364 *((uint32_t *)&env->fpr[i] + 1) = tswapl(registers[(i * 2) + 33]);
366 /* nip, msr, ccr, lnk, ctr, xer, mq */
367 env->nip = tswapl(registers[96]);
368 _store_msr(tswapl(registers[97]));
369 registers[98] = tswapl(registers[98]);
370 for (i = 0; i < 8; i++)
371 env->crf[i] = (registers[98] >> (32 - (i * 4))) & 0xF;
372 env->lr = tswapl(registers[99]);
373 env->ctr = tswapl(registers[100]);
374 _store_xer(tswapl(registers[101]));
378 static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
383 static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
389 /* port = 0 means default port */
390 int cpu_gdbstub(void *opaque, int (*main_loop)(void *opaque), int port)
394 int ret, ch, reg_size, type;
396 uint8_t mem_buf[2000];
400 printf("Waiting gdb connection on port %d\n", port);
401 if (gdbstub_open(port) < 0)
403 printf("Connected\n");
405 ret = get_packet(buf, sizeof(buf));
412 snprintf(buf, sizeof(buf), "S%02x", SIGTRAP);
417 addr = strtoul(p, (char **)&p, 16);
418 env = cpu_gdbstub_get_env(opaque);
419 #if defined(TARGET_I386)
421 #elif defined (TARGET_PPC)
425 ret = main_loop(opaque);
426 if (ret == EXCP_DEBUG)
430 snprintf(buf, sizeof(buf), "S%02x", ret);
434 env = cpu_gdbstub_get_env(opaque);
436 addr = strtoul(p, (char **)&p, 16);
437 #if defined(TARGET_I386)
439 #elif defined (TARGET_PPC)
443 cpu_single_step(env, 1);
444 ret = main_loop(opaque);
445 cpu_single_step(env, 0);
446 if (ret == EXCP_DEBUG)
450 snprintf(buf, sizeof(buf), "S%02x", ret);
454 env = cpu_gdbstub_get_env(opaque);
455 reg_size = cpu_gdb_read_registers(env, mem_buf);
456 memtohex(buf, mem_buf, reg_size);
460 env = cpu_gdbstub_get_env(opaque);
461 registers = (void *)mem_buf;
463 hextomem((uint8_t *)registers, p, len);
464 cpu_gdb_write_registers(env, mem_buf, len);
468 env = cpu_gdbstub_get_env(opaque);
469 addr = strtoul(p, (char **)&p, 16);
472 len = strtoul(p, NULL, 16);
473 if (cpu_memory_rw_debug(env, addr, mem_buf, len, 0) != 0)
474 memset(mem_buf, 0, len);
475 memtohex(buf, mem_buf, len);
479 env = cpu_gdbstub_get_env(opaque);
480 addr = strtoul(p, (char **)&p, 16);
483 len = strtoul(p, (char **)&p, 16);
486 hextomem(mem_buf, p, len);
487 if (cpu_memory_rw_debug(env, addr, mem_buf, len, 1) != 0)
493 type = strtoul(p, (char **)&p, 16);
496 addr = strtoul(p, (char **)&p, 16);
499 len = strtoul(p, (char **)&p, 16);
500 if (type == 0 || type == 1) {
501 env = cpu_gdbstub_get_env(opaque);
502 if (cpu_breakpoint_insert(env, addr) < 0)
503 goto breakpoint_error;
511 type = strtoul(p, (char **)&p, 16);
514 addr = strtoul(p, (char **)&p, 16);
517 len = strtoul(p, (char **)&p, 16);
518 if (type == 0 || type == 1) {
519 env = cpu_gdbstub_get_env(opaque);
520 cpu_breakpoint_remove(env, addr);
523 goto breakpoint_error;
528 /* put empty packet */