/* Remote utility routines for the remote server for GDB.
- Copyright 1986, 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
+ Copyright 1986, 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
+ 2002
Free Software Foundation, Inc.
This file is part of GDB.
#include <fcntl.h>
#include <sys/time.h>
#include <unistd.h>
+#include <arpa/inet.h>
int remote_debug = 0;
struct ui_file *gdb_stdlog;
static int remote_desc;
+/* FIXME headerize? */
+extern int using_threads;
+extern int debug_threads;
+
/* Open a connection to a remote debugger.
NAME is the filename used for communication. */
remote_open (char *name)
{
int save_fcntl_flags;
-
+
if (!strchr (name, ':'))
{
remote_desc = open (name, O_RDWR);
termios.c_lflag = 0;
termios.c_cflag &= ~(CSIZE | PARENB);
termios.c_cflag |= CLOCAL | CS8;
- termios.c_cc[VMIN] = 0;
+ termios.c_cc[VMIN] = 1;
termios.c_cc[VTIME] = 0;
tcsetattr (remote_desc, TCSANOW, &termios);
termio.c_lflag = 0;
termio.c_cflag &= ~(CSIZE | PARENB);
termio.c_cflag |= CLOCAL | CS8;
- termio.c_cc[VMIN] = 0;
+ termio.c_cc[VMIN] = 1;
termio.c_cc[VTIME] = 0;
ioctl (remote_desc, TCSETA, &termio);
}
#endif
-
+ fprintf (stderr, "Remote debugging using %s\n", name);
}
else
{
int port;
struct sockaddr_in sockaddr;
int tmp;
- struct protoent *protoent;
int tmp_desc;
port_str = strchr (name, ':');
if (remote_desc == -1)
perror_with_name ("Accept failed");
- protoent = getprotobyname ("tcp");
- if (!protoent)
- perror_with_name ("getprotobyname");
-
/* Enable TCP keep alive process. */
tmp = 1;
setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof (tmp));
/* Tell TCP not to delay small packets. This greatly speeds up
interactive response. */
tmp = 1;
- setsockopt (remote_desc, protoent->p_proto, TCP_NODELAY,
+ setsockopt (remote_desc, IPPROTO_TCP, TCP_NODELAY,
(char *) &tmp, sizeof (tmp));
close (tmp_desc); /* No longer need this */
signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbserver simply
exits when the remote side dies. */
+
+ /* Convert IP address to string. */
+ fprintf (stderr, "Remote debugging from host %s\n",
+ inet_ntoa (sockaddr.sin_addr));
}
#if defined(F_SETFL) && defined (FASYNC)
#endif
#endif
disable_async_io ();
- fprintf (stderr, "Remote debugging using %s\n", name);
}
void
return a - 'a' + 10;
else
error ("Reply contains invalid hex digit");
+ return 0;
+}
+
+int
+unhexify (char *bin, const char *hex, int count)
+{
+ int i;
+
+ for (i = 0; i < count; i++)
+ {
+ if (hex[0] == 0 || hex[1] == 0)
+ {
+ /* Hex string is short, or of uneven length.
+ Return the count that has been converted so far. */
+ return i;
+ }
+ *bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]);
+ hex += 2;
+ }
+ return i;
+}
+
+static void
+decode_address (CORE_ADDR *addrp, const char *start, int len)
+{
+ CORE_ADDR addr;
+ char ch;
+ int i;
+
+ addr = 0;
+ for (i = 0; i < len; i++)
+ {
+ ch = start[i];
+ addr = addr << 4;
+ addr = addr | (fromhex (ch) & 0x0f);
+ }
+ *addrp = addr;
}
/* Convert number NIB to a hex digit. */
return 'a' + nib - 10;
}
+int
+hexify (char *hex, const char *bin, int count)
+{
+ int i;
+
+ /* May use a length, or a nul-terminated string as input. */
+ if (count == 0)
+ count = strlen (bin);
+
+ for (i = 0; i < count; i++)
+ {
+ *hex++ = tohex ((*bin >> 4) & 0xf);
+ *hex++ = tohex (*bin++ & 0xf);
+ }
+ *hex = 0;
+ return i;
+}
+
/* Send a packet to the remote machine, with error checking.
The data of the packet is in BUF. Returns >= 0 on success, -1 otherwise. */
{
int i;
unsigned char csum = 0;
- char buf2[PBUFSIZ];
+ char *buf2;
char buf3[1];
int cnt = strlen (buf);
char *p;
+ buf2 = malloc (PBUFSIZ);
+
/* Copy the packet into buffer BUF2, encapsulating it
and giving it a checksum. */
}
if (remote_debug)
- printf ("putpkt (\"%s\"); [looking for ack]\n", buf2);
+ {
+ fprintf (stderr, "putpkt (\"%s\"); [looking for ack]\n", buf2);
+ fflush (stderr);
+ }
cc = read (remote_desc, buf3, 1);
if (remote_debug)
- printf ("[received '%c' (0x%x)]\n", buf3[0], buf3[0]);
+ {
+ fprintf (stderr, "[received '%c' (0x%x)]\n", buf3[0], buf3[0]);
+ fflush (stderr);
+ }
+
if (cc <= 0)
{
if (cc == 0)
else
perror ("putpkt(read)");
+ free (buf2);
return -1;
}
+
+ /* Check for an input interrupt while we're here. */
+ if (buf3[0] == '\003')
+ kill ((*the_target->signal_pid) (), SIGINT);
}
while (buf3[0] != '+');
+ free (buf2);
return 1; /* Success! */
}
will cause us to send a SIGINT to the child. */
static void
-input_interrupt (void)
+input_interrupt (int unused)
{
fd_set readset;
struct timeval immediate = { 0, 0 };
return;
}
- kill (inferior_pid, SIGINT);
+ kill ((*the_target->signal_pid) (), SIGINT);
}
}
if (c == '$')
break;
if (remote_debug)
- printf ("[getpkt: discarding char '%c']\n", c);
+ {
+ fprintf (stderr, "[getpkt: discarding char '%c']\n", c);
+ fflush (stderr);
+ }
+
if (c < 0)
return -1;
}
}
if (remote_debug)
- printf ("getpkt (\"%s\"); [sending ack] \n", buf);
+ {
+ fprintf (stderr, "getpkt (\"%s\"); [sending ack] \n", buf);
+ fflush (stderr);
+ }
write (remote_desc, "+", 1);
if (remote_debug)
- printf ("[sent ack]\n");
+ {
+ fprintf (stderr, "[sent ack]\n");
+ fflush (stderr);
+ }
+
return bp - buf;
}
static char *
outreg (int regno, char *buf)
{
- int regsize = REGISTER_RAW_SIZE (regno);
-
if ((regno >> 12) != 0)
*buf++ = tohex ((regno >> 12) & 0xf);
if ((regno >> 8) != 0)
*buf++ = tohex ((regno >> 4) & 0xf);
*buf++ = tohex (regno & 0xf);
*buf++ = ':';
- convert_int_to_ascii (®isters[REGISTER_BYTE (regno)], buf, regsize);
- buf += 2 * regsize;
+ collect_register_as_string (regno, buf);
+ buf += 2 * register_size (regno);
*buf++ = ';';
return buf;
}
void
+new_thread_notify (int id)
+{
+ char own_buf[256];
+
+ /* The `n' response is not yet part of the remote protocol. Do nothing. */
+ if (1)
+ return;
+
+ if (server_waiting == 0)
+ return;
+
+ sprintf (own_buf, "n%x", id);
+ disable_async_io ();
+ putpkt (own_buf);
+ enable_async_io ();
+}
+
+void
+dead_thread_notify (int id)
+{
+ char own_buf[256];
+
+ /* The `x' response is not yet part of the remote protocol. Do nothing. */
+ if (1)
+ return;
+
+ sprintf (own_buf, "x%x", id);
+ disable_async_io ();
+ putpkt (own_buf);
+ enable_async_io ();
+}
+
+void
prepare_resume_reply (char *buf, char status, unsigned char signo)
{
- int nib;
+ int nib, sig;
*buf++ = status;
- /* FIXME! Should be converting this signal number (numbered
- according to the signal numbering of the system we are running on)
- to the signal numbers used by the gdb protocol (see enum target_signal
- in gdb/target.h). */
- nib = ((signo & 0xf0) >> 4);
+ sig = (int)target_signal_from_host (signo);
+
+ nib = ((sig & 0xf0) >> 4);
*buf++ = tohex (nib);
- nib = signo & 0x0f;
+ nib = sig & 0x0f;
*buf++ = tohex (nib);
if (status == 'T')
{
-#ifdef GDBSERVER_RESUME_REGS
- static int gdbserver_resume_regs[] = GDBSERVER_RESUME_REGS ;
- int i;
- for (i = 0;
- i < sizeof (gdbserver_resume_regs)
- / sizeof (gdbserver_resume_regs[0]);
- i++)
+ const char **regp = gdbserver_expedite_regs;
+ while (*regp)
{
- int regnum = gdbserver_resume_regs[i];
- buf = outreg (regnum, buf);
+ buf = outreg (find_regno (*regp), buf);
+ regp ++;
}
-#else /* !defined(GDBSERVER_RESUME_REGS) */
- buf = outreg (PC_REGNUM, buf);
- buf = outreg (FP_REGNUM, buf);
- buf = outreg (SP_REGNUM, buf);
- if (NPC_REGNUM >= 0)
- buf = outreg (NPC_REGNUM, buf);
-#ifdef O7_REGNUM
- buf = outreg (O7_REGNUM, buf);
-#endif
-#endif /* GDBSERVER_RESUME_REGS */
- /* If the debugger hasn't used any thread features, don't burden it with
- threads. If we didn't check this, GDB 4.13 and older would choke. */
- if (cont_thread != 0)
+ /* Formerly, if the debugger had not used any thread features we would not
+ burden it with a thread status response. This was for the benefit of
+ GDB 4.13 and older. However, in recent GDB versions the check
+ (``if (cont_thread != 0)'') does not have the desired effect because of
+ sillyness in the way that the remote protocol handles specifying a thread.
+ Since thread support relies on qSymbol support anyway, assume GDB can handle
+ threads. */
+
+ if (using_threads)
{
+ /* FIXME right place to set this? */
+ thread_from_wait = ((struct inferior_list_entry *)current_inferior)->id;
+ if (debug_threads)
+ fprintf (stderr, "Writing resume reply for %d\n\n", thread_from_wait);
if (old_thread_from_wait != thread_from_wait)
{
+ general_thread = thread_from_wait;
sprintf (buf, "thread:%x;", thread_from_wait);
buf += strlen (buf);
old_thread_from_wait = thread_from_wait;
convert_ascii_to_int (&from[i++], to, *len_ptr);
}
+
+int
+look_up_one_symbol (const char *name, CORE_ADDR *addrp)
+{
+ char own_buf[266], *p, *q;
+ int len;
+
+ /* Send the request. */
+ strcpy (own_buf, "qSymbol:");
+ hexify (own_buf + strlen ("qSymbol:"), name, strlen (name));
+ if (putpkt (own_buf) < 0)
+ return -1;
+
+ /* FIXME: Eventually add buffer overflow checking (to getpkt?) */
+ len = getpkt (own_buf);
+ if (len < 0)
+ return -1;
+
+ if (strncmp (own_buf, "qSymbol:", strlen ("qSymbol:")) != 0)
+ {
+ /* Malformed response. */
+ if (remote_debug)
+ {
+ fprintf (stderr, "Malformed response to qSymbol, ignoring.\n");
+ fflush (stderr);
+ }
+
+ return -1;
+ }
+
+ p = own_buf + strlen ("qSymbol:");
+ q = p;
+ while (*q && *q != ':')
+ q++;
+
+ /* Make sure we found a value for the symbol. */
+ if (p == q || *q == '\0')
+ return 0;
+
+ decode_address (addrp, p, q - p);
+ return 1;
+}
+
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