4 * Copyright (c) 2003-2005 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
21 #ifdef CONFIG_USER_ONLY
35 #include "qemu_socket.h"
37 /* XXX: these constants may be independent of the host ones even for Unix */
56 /* XXX: This is not thread safe. Do we care? */
57 static int gdbserver_fd = -1;
59 typedef struct GDBState {
60 CPUState *env; /* current CPU */
61 enum RSState state; /* parsing state */
66 #ifdef CONFIG_USER_ONLY
71 #ifdef CONFIG_USER_ONLY
72 /* XXX: remove this hack. */
73 static GDBState gdbserver_state;
76 static int get_char(GDBState *s)
82 ret = recv(s->fd, &ch, 1, 0);
84 if (errno != EINTR && errno != EAGAIN)
86 } else if (ret == 0) {
95 static void put_buffer(GDBState *s, const uint8_t *buf, int len)
100 ret = send(s->fd, buf, len, 0);
102 if (errno != EINTR && errno != EAGAIN)
111 static inline int fromhex(int v)
113 if (v >= '0' && v <= '9')
115 else if (v >= 'A' && v <= 'F')
117 else if (v >= 'a' && v <= 'f')
123 static inline int tohex(int v)
131 static void memtohex(char *buf, const uint8_t *mem, int len)
136 for(i = 0; i < len; i++) {
138 *q++ = tohex(c >> 4);
139 *q++ = tohex(c & 0xf);
144 static void hextomem(uint8_t *mem, const char *buf, int len)
148 for(i = 0; i < len; i++) {
149 mem[i] = (fromhex(buf[0]) << 4) | fromhex(buf[1]);
154 /* return -1 if error, 0 if OK */
155 static int put_packet(GDBState *s, char *buf)
158 int len, csum, ch, i;
161 printf("reply='%s'\n", buf);
166 put_buffer(s, buf1, 1);
168 put_buffer(s, buf, len);
170 for(i = 0; i < len; i++) {
174 buf1[1] = tohex((csum >> 4) & 0xf);
175 buf1[2] = tohex((csum) & 0xf);
177 put_buffer(s, buf1, 3);
188 #if defined(TARGET_I386)
190 static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
192 uint32_t *registers = (uint32_t *)mem_buf;
195 for(i = 0; i < 8; i++) {
196 registers[i] = env->regs[i];
198 registers[8] = env->eip;
199 registers[9] = env->eflags;
200 registers[10] = env->segs[R_CS].selector;
201 registers[11] = env->segs[R_SS].selector;
202 registers[12] = env->segs[R_DS].selector;
203 registers[13] = env->segs[R_ES].selector;
204 registers[14] = env->segs[R_FS].selector;
205 registers[15] = env->segs[R_GS].selector;
206 /* XXX: convert floats */
207 for(i = 0; i < 8; i++) {
208 memcpy(mem_buf + 16 * 4 + i * 10, &env->fpregs[i], 10);
210 registers[36] = env->fpuc;
211 fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
212 registers[37] = fpus;
213 registers[38] = 0; /* XXX: convert tags */
214 registers[39] = 0; /* fiseg */
215 registers[40] = 0; /* fioff */
216 registers[41] = 0; /* foseg */
217 registers[42] = 0; /* fooff */
218 registers[43] = 0; /* fop */
220 for(i = 0; i < 16; i++)
221 tswapls(®isters[i]);
222 for(i = 36; i < 44; i++)
223 tswapls(®isters[i]);
227 static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
229 uint32_t *registers = (uint32_t *)mem_buf;
232 for(i = 0; i < 8; i++) {
233 env->regs[i] = tswapl(registers[i]);
235 env->eip = tswapl(registers[8]);
236 env->eflags = tswapl(registers[9]);
237 #if defined(CONFIG_USER_ONLY)
238 #define LOAD_SEG(index, sreg)\
239 if (tswapl(registers[index]) != env->segs[sreg].selector)\
240 cpu_x86_load_seg(env, sreg, tswapl(registers[index]));
250 #elif defined (TARGET_PPC)
251 static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
253 uint32_t *registers = (uint32_t *)mem_buf, tmp;
257 for(i = 0; i < 32; i++) {
258 registers[i] = tswapl(env->gpr[i]);
261 for (i = 0; i < 32; i++) {
262 registers[(i * 2) + 32] = tswapl(*((uint32_t *)&env->fpr[i]));
263 registers[(i * 2) + 33] = tswapl(*((uint32_t *)&env->fpr[i] + 1));
265 /* nip, msr, ccr, lnk, ctr, xer, mq */
266 registers[96] = tswapl(env->nip);
267 registers[97] = tswapl(do_load_msr(env));
269 for (i = 0; i < 8; i++)
270 tmp |= env->crf[i] << (32 - ((i + 1) * 4));
271 registers[98] = tswapl(tmp);
272 registers[99] = tswapl(env->lr);
273 registers[100] = tswapl(env->ctr);
274 registers[101] = tswapl(do_load_xer(env));
280 static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
282 uint32_t *registers = (uint32_t *)mem_buf;
286 for (i = 0; i < 32; i++) {
287 env->gpr[i] = tswapl(registers[i]);
290 for (i = 0; i < 32; i++) {
291 *((uint32_t *)&env->fpr[i]) = tswapl(registers[(i * 2) + 32]);
292 *((uint32_t *)&env->fpr[i] + 1) = tswapl(registers[(i * 2) + 33]);
294 /* nip, msr, ccr, lnk, ctr, xer, mq */
295 env->nip = tswapl(registers[96]);
296 do_store_msr(env, tswapl(registers[97]));
297 registers[98] = tswapl(registers[98]);
298 for (i = 0; i < 8; i++)
299 env->crf[i] = (registers[98] >> (32 - ((i + 1) * 4))) & 0xF;
300 env->lr = tswapl(registers[99]);
301 env->ctr = tswapl(registers[100]);
302 do_store_xer(env, tswapl(registers[101]));
304 #elif defined (TARGET_SPARC)
305 static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
307 target_ulong *registers = (target_ulong *)mem_buf;
311 for(i = 0; i < 8; i++) {
312 registers[i] = tswapl(env->gregs[i]);
314 /* fill in register window */
315 for(i = 0; i < 24; i++) {
316 registers[i + 8] = tswapl(env->regwptr[i]);
319 for (i = 0; i < 32; i++) {
320 registers[i + 32] = tswapl(*((uint32_t *)&env->fpr[i]));
322 #ifndef TARGET_SPARC64
323 /* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
324 registers[64] = tswapl(env->y);
329 registers[65] = tswapl(tmp);
331 registers[66] = tswapl(env->wim);
332 registers[67] = tswapl(env->tbr);
333 registers[68] = tswapl(env->pc);
334 registers[69] = tswapl(env->npc);
335 registers[70] = tswapl(env->fsr);
336 registers[71] = 0; /* csr */
338 return 73 * sizeof(target_ulong);
340 for (i = 0; i < 32; i += 2) {
341 registers[i/2 + 64] = tswapl(*((uint64_t *)&env->fpr[i]));
343 registers[81] = tswapl(env->pc);
344 registers[82] = tswapl(env->npc);
345 registers[83] = tswapl(env->tstate[env->tl]);
346 registers[84] = tswapl(env->fsr);
347 registers[85] = tswapl(env->fprs);
348 registers[86] = tswapl(env->y);
349 return 87 * sizeof(target_ulong);
353 static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
355 target_ulong *registers = (target_ulong *)mem_buf;
359 for(i = 0; i < 7; i++) {
360 env->gregs[i] = tswapl(registers[i]);
362 /* fill in register window */
363 for(i = 0; i < 24; i++) {
364 env->regwptr[i] = tswapl(registers[i + 8]);
367 for (i = 0; i < 32; i++) {
368 *((uint32_t *)&env->fpr[i]) = tswapl(registers[i + 32]);
370 #ifndef TARGET_SPARC64
371 /* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
372 env->y = tswapl(registers[64]);
373 PUT_PSR(env, tswapl(registers[65]));
374 env->wim = tswapl(registers[66]);
375 env->tbr = tswapl(registers[67]);
376 env->pc = tswapl(registers[68]);
377 env->npc = tswapl(registers[69]);
378 env->fsr = tswapl(registers[70]);
380 for (i = 0; i < 32; i += 2) {
382 tmp = tswapl(registers[i/2 + 64]) << 32;
383 tmp |= tswapl(registers[i/2 + 64 + 1]);
384 *((uint64_t *)&env->fpr[i]) = tmp;
386 env->pc = tswapl(registers[81]);
387 env->npc = tswapl(registers[82]);
388 env->tstate[env->tl] = tswapl(registers[83]);
389 env->fsr = tswapl(registers[84]);
390 env->fprs = tswapl(registers[85]);
391 env->y = tswapl(registers[86]);
394 #elif defined (TARGET_ARM)
395 static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
401 /* 16 core integer registers (4 bytes each). */
402 for (i = 0; i < 16; i++)
404 *(uint32_t *)ptr = tswapl(env->regs[i]);
407 /* 8 FPA registers (12 bytes each), FPS (4 bytes).
408 Not yet implemented. */
409 memset (ptr, 0, 8 * 12 + 4);
411 /* CPSR (4 bytes). */
412 *(uint32_t *)ptr = tswapl (cpsr_read(env));
415 return ptr - mem_buf;
418 static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
424 /* Core integer registers. */
425 for (i = 0; i < 16; i++)
427 env->regs[i] = tswapl(*(uint32_t *)ptr);
430 /* Ignore FPA regs and scr. */
432 cpsr_write (env, tswapl(*(uint32_t *)ptr), 0xffffffff);
434 #elif defined (TARGET_MIPS)
435 static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
441 for (i = 0; i < 32; i++)
443 *(uint32_t *)ptr = tswapl(env->gpr[i]);
447 *(uint32_t *)ptr = tswapl(env->CP0_Status);
450 *(uint32_t *)ptr = tswapl(env->LO);
453 *(uint32_t *)ptr = tswapl(env->HI);
456 *(uint32_t *)ptr = tswapl(env->CP0_BadVAddr);
459 *(uint32_t *)ptr = tswapl(env->CP0_Cause);
462 *(uint32_t *)ptr = tswapl(env->PC);
465 /* 32 FP registers, fsr, fir, fp. Not yet implemented. */
467 return ptr - mem_buf;
470 static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
476 for (i = 0; i < 32; i++)
478 env->gpr[i] = tswapl(*(uint32_t *)ptr);
482 env->CP0_Status = tswapl(*(uint32_t *)ptr);
485 env->LO = tswapl(*(uint32_t *)ptr);
488 env->HI = tswapl(*(uint32_t *)ptr);
491 env->CP0_BadVAddr = tswapl(*(uint32_t *)ptr);
494 env->CP0_Cause = tswapl(*(uint32_t *)ptr);
497 env->PC = tswapl(*(uint32_t *)ptr);
500 #elif defined (TARGET_SH4)
501 static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
503 uint32_t *ptr = (uint32_t *)mem_buf;
506 #define SAVE(x) *ptr++=tswapl(x)
507 for (i = 0; i < 16; i++) SAVE(env->gregs[i]);
515 SAVE (0); /* TICKS */
516 SAVE (0); /* STALLS */
517 SAVE (0); /* CYCLES */
518 SAVE (0); /* INSTS */
521 return ((uint8_t *)ptr - mem_buf);
524 static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
526 uint32_t *ptr = (uint32_t *)mem_buf;
529 #define LOAD(x) (x)=*ptr++;
530 for (i = 0; i < 16; i++) LOAD(env->gregs[i]);
540 static int cpu_gdb_read_registers(CPUState *env, uint8_t *mem_buf)
545 static void cpu_gdb_write_registers(CPUState *env, uint8_t *mem_buf, int size)
551 static int gdb_handle_packet(GDBState *s, CPUState *env, const char *line_buf)
554 int ch, reg_size, type;
556 uint8_t mem_buf[2000];
561 printf("command='%s'\n", line_buf);
567 /* TODO: Make this return the correct value for user-mode. */
568 snprintf(buf, sizeof(buf), "S%02x", SIGTRAP);
573 addr = strtoul(p, (char **)&p, 16);
574 #if defined(TARGET_I386)
576 #elif defined (TARGET_PPC)
578 #elif defined (TARGET_SPARC)
581 #elif defined (TARGET_ARM)
582 env->regs[15] = addr;
583 #elif defined (TARGET_SH4)
587 #ifdef CONFIG_USER_ONLY
588 s->running_state = 1;
595 addr = strtoul(p, (char **)&p, 16);
596 #if defined(TARGET_I386)
598 #elif defined (TARGET_PPC)
600 #elif defined (TARGET_SPARC)
603 #elif defined (TARGET_ARM)
604 env->regs[15] = addr;
605 #elif defined (TARGET_SH4)
609 cpu_single_step(env, 1);
610 #ifdef CONFIG_USER_ONLY
611 s->running_state = 1;
617 reg_size = cpu_gdb_read_registers(env, mem_buf);
618 memtohex(buf, mem_buf, reg_size);
622 registers = (void *)mem_buf;
624 hextomem((uint8_t *)registers, p, len);
625 cpu_gdb_write_registers(env, mem_buf, len);
629 addr = strtoul(p, (char **)&p, 16);
632 len = strtoul(p, NULL, 16);
633 if (cpu_memory_rw_debug(env, addr, mem_buf, len, 0) != 0) {
634 put_packet (s, "E14");
636 memtohex(buf, mem_buf, len);
641 addr = strtoul(p, (char **)&p, 16);
644 len = strtoul(p, (char **)&p, 16);
647 hextomem(mem_buf, p, len);
648 if (cpu_memory_rw_debug(env, addr, mem_buf, len, 1) != 0)
649 put_packet(s, "E14");
654 type = strtoul(p, (char **)&p, 16);
657 addr = strtoul(p, (char **)&p, 16);
660 len = strtoul(p, (char **)&p, 16);
661 if (type == 0 || type == 1) {
662 if (cpu_breakpoint_insert(env, addr) < 0)
663 goto breakpoint_error;
667 put_packet(s, "E22");
671 type = strtoul(p, (char **)&p, 16);
674 addr = strtoul(p, (char **)&p, 16);
677 len = strtoul(p, (char **)&p, 16);
678 if (type == 0 || type == 1) {
679 cpu_breakpoint_remove(env, addr);
682 goto breakpoint_error;
685 #ifdef CONFIG_USER_ONLY
687 if (strncmp(p, "Offsets", 7) == 0) {
688 TaskState *ts = env->opaque;
690 sprintf(buf, "Text=%x;Data=%x;Bss=%x", ts->info->code_offset,
691 ts->info->data_offset, ts->info->data_offset);
699 /* put empty packet */
707 extern void tb_flush(CPUState *env);
709 #ifndef CONFIG_USER_ONLY
710 static void gdb_vm_stopped(void *opaque, int reason)
712 GDBState *s = opaque;
716 /* disable single step if it was enable */
717 cpu_single_step(s->env, 0);
719 if (reason == EXCP_DEBUG) {
722 } else if (reason == EXCP_INTERRUPT) {
727 snprintf(buf, sizeof(buf), "S%02x", ret);
732 static void gdb_read_byte(GDBState *s, int ch)
734 CPUState *env = s->env;
738 #ifndef CONFIG_USER_ONLY
740 /* when the CPU is running, we cannot do anything except stop
741 it when receiving a char */
742 vm_stop(EXCP_INTERRUPT);
749 s->line_buf_index = 0;
750 s->state = RS_GETLINE;
755 s->state = RS_CHKSUM1;
756 } else if (s->line_buf_index >= sizeof(s->line_buf) - 1) {
759 s->line_buf[s->line_buf_index++] = ch;
763 s->line_buf[s->line_buf_index] = '\0';
764 s->line_csum = fromhex(ch) << 4;
765 s->state = RS_CHKSUM2;
768 s->line_csum |= fromhex(ch);
770 for(i = 0; i < s->line_buf_index; i++) {
771 csum += s->line_buf[i];
773 if (s->line_csum != (csum & 0xff)) {
775 put_buffer(s, reply, 1);
779 put_buffer(s, reply, 1);
780 s->state = gdb_handle_packet(s, env, s->line_buf);
787 #ifdef CONFIG_USER_ONLY
789 gdb_handlesig (CPUState *env, int sig)
795 if (gdbserver_fd < 0)
798 s = &gdbserver_state;
800 /* disable single step if it was enabled */
801 cpu_single_step(env, 0);
806 snprintf(buf, sizeof(buf), "S%02x", sig);
812 s->running_state = 0;
813 while (s->running_state == 0) {
814 n = read (s->fd, buf, 256);
819 for (i = 0; i < n; i++)
820 gdb_read_byte (s, buf[i]);
822 else if (n == 0 || errno != EAGAIN)
824 /* XXX: Connection closed. Should probably wait for annother
825 connection before continuing. */
832 /* Tell the remote gdb that the process has exited. */
833 void gdb_exit(CPUState *env, int code)
838 if (gdbserver_fd < 0)
841 s = &gdbserver_state;
843 snprintf(buf, sizeof(buf), "W%02x", code);
848 static void gdb_read(void *opaque)
850 GDBState *s = opaque;
854 size = recv(s->fd, buf, sizeof(buf), 0);
858 /* end of connection */
859 qemu_del_vm_stop_handler(gdb_vm_stopped, s);
860 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
864 for(i = 0; i < size; i++)
865 gdb_read_byte(s, buf[i]);
871 static void gdb_accept(void *opaque)
874 struct sockaddr_in sockaddr;
879 len = sizeof(sockaddr);
880 fd = accept(gdbserver_fd, (struct sockaddr *)&sockaddr, &len);
881 if (fd < 0 && errno != EINTR) {
884 } else if (fd >= 0) {
889 /* set short latency */
891 setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
893 #ifdef CONFIG_USER_ONLY
894 s = &gdbserver_state;
895 memset (s, 0, sizeof (GDBState));
897 s = qemu_mallocz(sizeof(GDBState));
903 s->env = first_cpu; /* XXX: allow to change CPU */
906 #ifdef CONFIG_USER_ONLY
907 fcntl(fd, F_SETFL, O_NONBLOCK);
909 socket_set_nonblock(fd);
912 vm_stop(EXCP_INTERRUPT);
914 /* start handling I/O */
915 qemu_set_fd_handler(s->fd, gdb_read, NULL, s);
916 /* when the VM is stopped, the following callback is called */
917 qemu_add_vm_stop_handler(gdb_vm_stopped, s);
921 static int gdbserver_open(int port)
923 struct sockaddr_in sockaddr;
926 fd = socket(PF_INET, SOCK_STREAM, 0);
932 /* allow fast reuse */
934 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&val, sizeof(val));
936 sockaddr.sin_family = AF_INET;
937 sockaddr.sin_port = htons(port);
938 sockaddr.sin_addr.s_addr = 0;
939 ret = bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr));
949 #ifndef CONFIG_USER_ONLY
950 socket_set_nonblock(fd);
955 int gdbserver_start(int port)
957 gdbserver_fd = gdbserver_open(port);
958 if (gdbserver_fd < 0)
960 /* accept connections */
961 #ifdef CONFIG_USER_ONLY
964 qemu_set_fd_handler(gdbserver_fd, gdb_accept, NULL, NULL);