/* Remote utility routines for the remote server for GDB.
- Copyright (C) 1986, 1989, 1993 Free Software Foundation, Inc.
+ Copyright 1986, 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
+ 2002, 2003, 2004, 2005
+ Free Software Foundation, Inc.
-This file is part of GDB.
+ This file is part of GDB.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
#include "server.h"
#include "terminal.h"
#include <sys/ioctl.h>
#include <signal.h>
#include <fcntl.h>
+#include <sys/time.h>
+#include <unistd.h>
+#include <arpa/inet.h>
-int remote_debug = 1;
+/* A cache entry for a successfully looked-up symbol. */
+struct sym_cache
+{
+ const char *name;
+ CORE_ADDR addr;
+ struct sym_cache *next;
+};
+
+/* The symbol cache. */
+static struct sym_cache *symbol_cache;
+
+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. */
void
-remote_open (name)
- char *name;
+remote_open (char *name)
{
int save_fcntl_flags;
-
+
if (!strchr (name, ':'))
{
remote_desc = open (name, O_RDWR);
#ifdef HAVE_TERMIOS
{
struct termios termios;
- tcgetattr(remote_desc, &termios);
+ tcgetattr (remote_desc, &termios);
termios.c_iflag = 0;
termios.c_oflag = 0;
termios.c_lflag = 0;
- termios.c_cflag &= ~(CSIZE|PARENB);
+ 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);
+ tcsetattr (remote_desc, TCSANOW, &termios);
}
#endif
termio.c_iflag = 0;
termio.c_oflag = 0;
termio.c_lflag = 0;
- termio.c_cflag &= ~(CSIZE|PARENB);
+ 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, ':');
/* Allow rapid reuse of this port. */
tmp = 1;
- setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *)&tmp,
- sizeof(tmp));
+ setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp,
+ sizeof (tmp));
sockaddr.sin_family = PF_INET;
- sockaddr.sin_port = htons(port);
+ sockaddr.sin_port = htons (port);
sockaddr.sin_addr.s_addr = INADDR_ANY;
- if (bind (tmp_desc, (struct sockaddr *)&sockaddr, sizeof (sockaddr))
+ if (bind (tmp_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr))
|| listen (tmp_desc, 1))
perror_with_name ("Can't bind address");
+ fprintf (stderr, "Listening on port %d\n", port);
+
tmp = sizeof (sockaddr);
- remote_desc = accept (tmp_desc, (struct sockaddr *)&sockaddr, &tmp);
+ remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp);
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));
+ setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof (tmp));
/* Tell TCP not to delay small packets. This greatly speeds up
- interactive response. */
+ interactive response. */
tmp = 1;
- setsockopt (remote_desc, protoent->p_proto, TCP_NODELAY,
- (char *)&tmp, sizeof(tmp));
+ 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. */
+ 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)
save_fcntl_flags = fcntl (remote_desc, F_GETFL, 0);
fcntl (remote_desc, F_SETFL, save_fcntl_flags | FASYNC);
+#if defined (F_SETOWN)
+ fcntl (remote_desc, F_SETOWN, getpid ());
+#endif
+#endif
disable_async_io ();
-#endif /* FASYNC */
- fprintf (stderr, "Remote debugging using %s\n", name);
}
void
-remote_close()
+remote_close (void)
{
close (remote_desc);
}
/* Convert hex digit A to a number. */
static int
-fromhex (a)
- int a;
+fromhex (int a)
{
if (a >= '0' && a <= '9')
return a - '0';
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. */
static int
-tohex (nib)
- int nib;
+tohex (int nib)
{
if (nib < 10)
return '0' + nib;
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
-putpkt (buf)
- char *buf;
+putpkt (char *buf)
{
int i;
unsigned char csum = 0;
- char buf2[2000];
+ 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')
+ (*the_target->send_signal) (SIGINT);
}
while (buf3[0] != '+');
+ free (buf2);
return 1; /* Success! */
}
will cause us to send a SIGINT to the child. */
static void
-input_interrupt()
+input_interrupt (int unused)
{
- int cc;
- char c;
+ fd_set readset;
+ struct timeval immediate = { 0, 0 };
- cc = read (remote_desc, &c, 1);
+ /* Protect against spurious interrupts. This has been observed to
+ be a problem under NetBSD 1.4 and 1.5. */
- if (cc != 1 || c != '\003')
+ FD_ZERO (&readset);
+ FD_SET (remote_desc, &readset);
+ if (select (remote_desc + 1, &readset, 0, 0, &immediate) > 0)
{
- fprintf(stderr, "input_interrupt, cc = %d c = %d\n", cc, c);
- return;
+ int cc;
+ char c = 0;
+
+ cc = read (remote_desc, &c, 1);
+
+ if (cc != 1 || c != '\003')
+ {
+ fprintf (stderr, "input_interrupt, count = %d c = %d ('%c')\n",
+ cc, c, c);
+ return;
+ }
+
+ (*the_target->send_signal) (SIGINT);
}
+}
+
+void
+block_async_io (void)
+{
+ sigset_t sigio_set;
+ sigemptyset (&sigio_set);
+ sigaddset (&sigio_set, SIGIO);
+ sigprocmask (SIG_BLOCK, &sigio_set, NULL);
+}
- kill (inferior_pid, SIGINT);
+void
+unblock_async_io (void)
+{
+ sigset_t sigio_set;
+ sigemptyset (&sigio_set);
+ sigaddset (&sigio_set, SIGIO);
+ sigprocmask (SIG_UNBLOCK, &sigio_set, NULL);
}
+/* Asynchronous I/O support. SIGIO must be enabled when waiting, in order to
+ accept Control-C from the client, and must be disabled when talking to
+ the client. */
+
+/* Current state of asynchronous I/O. */
+static int async_io_enabled;
+
+/* Enable asynchronous I/O. */
void
-enable_async_io()
+enable_async_io (void)
{
+ if (async_io_enabled)
+ return;
+
signal (SIGIO, input_interrupt);
+ async_io_enabled = 1;
}
+/* Disable asynchronous I/O. */
void
-disable_async_io()
+disable_async_io (void)
{
+ if (!async_io_enabled)
+ return;
+
signal (SIGIO, SIG_IGN);
+ async_io_enabled = 0;
}
/* Returns next char from remote GDB. -1 if error. */
static int
-readchar ()
+readchar (void)
{
static char buf[BUFSIZ];
static int bufcnt = 0;
and store it in BUF. Returns length of packet, or negative if error. */
int
-getpkt (buf)
- char *buf;
+getpkt (char *buf)
{
char *bp;
unsigned char csum, c1, c2;
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;
}
c1 = fromhex (readchar ());
c2 = fromhex (readchar ());
-
+
if (csum == (c1 << 4) + c2)
break;
}
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;
}
void
-write_ok (buf)
- char *buf;
+write_ok (char *buf)
{
buf[0] = 'O';
buf[1] = 'K';
}
void
-write_enn (buf)
- char *buf;
+write_enn (char *buf)
{
+ /* Some day, we should define the meanings of the error codes... */
buf[0] = 'E';
- buf[1] = 'N';
- buf[2] = 'N';
+ buf[1] = '0';
+ buf[2] = '1';
buf[3] = '\0';
}
void
-convert_int_to_ascii (from, to, n)
- char *from, *to;
- int n;
+convert_int_to_ascii (char *from, char *to, int n)
{
int nib;
char ch;
void
-convert_ascii_to_int (from, to, n)
- char *from, *to;
- int n;
+convert_ascii_to_int (char *from, char *to, int n)
{
int nib1, nib2;
while (n--)
}
static char *
-outreg(regno, buf)
- int regno;
- char *buf;
+outreg (int regno, char *buf)
{
- extern char registers[];
- int regsize = REGISTER_RAW_SIZE (regno);
-
- *buf++ = tohex (regno >> 4);
+ if ((regno >> 12) != 0)
+ *buf++ = tohex ((regno >> 12) & 0xf);
+ if ((regno >> 8) != 0)
+ *buf++ = tohex ((regno >> 8) & 0xf);
+ *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
-prepare_resume_reply (buf, status, signo)
- char *buf;
- char status;
- unsigned char signo;
+new_thread_notify (int id)
{
- int nib;
+ 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, 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')
{
- buf = outreg (PC_REGNUM, buf);
- buf = outreg (FP_REGNUM, buf);
- buf = outreg (SP_REGNUM, buf);
-#ifdef NPC_REGNUM
- buf = outreg (NPC_REGNUM, buf);
-#endif
-#ifdef O7_REGNUM
- buf = outreg (O7_REGNUM, buf);
-#endif
+ const char **regp = gdbserver_expedite_regs;
+ while (*regp)
+ {
+ buf = outreg (find_regno (*regp), buf);
+ regp ++;
+ }
+
+ /* 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 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)
+ if (using_threads)
{
- if (old_thread_from_wait != thread_from_wait)
+ /* 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 %ld\n\n", thread_from_wait);
+ /* This if (1) ought to be unnecessary. But remote_wait in GDB
+ will claim this event belongs to inferior_ptid if we do not
+ specify a thread, and there's no way for gdbserver to know
+ what inferior_ptid is. */
+ if (1 || old_thread_from_wait != thread_from_wait)
{
- sprintf (buf, "thread:%x;", thread_from_wait);
+ general_thread = thread_from_wait;
+ sprintf (buf, "thread:%lx;", thread_from_wait);
buf += strlen (buf);
old_thread_from_wait = thread_from_wait;
}
}
void
-decode_m_packet (from, mem_addr_ptr, len_ptr)
- char *from;
- CORE_ADDR *mem_addr_ptr;
- unsigned int *len_ptr;
+decode_m_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr)
{
int i = 0, j = 0;
char ch;
}
void
-decode_M_packet (from, mem_addr_ptr, len_ptr, to)
- char *from, *to;
- CORE_ADDR *mem_addr_ptr;
- unsigned int *len_ptr;
+decode_M_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr,
+ char *to)
{
int i = 0;
char ch;
convert_ascii_to_int (&from[i++], to, *len_ptr);
}
+
+/* Ask GDB for the address of NAME, and return it in ADDRP if found.
+ Returns 1 if the symbol is found, 0 if it is not, -1 on error. */
+
+int
+look_up_one_symbol (const char *name, CORE_ADDR *addrp)
+{
+ char own_buf[266], *p, *q;
+ int len;
+ struct sym_cache *sym;
+
+ /* Check the cache first. */
+ for (sym = symbol_cache; sym; sym = sym->next)
+ if (strcmp (name, sym->name) == 0)
+ {
+ *addrp = sym->addr;
+ return 1;
+ }
+
+ /* 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);
+
+ /* Save the symbol in our cache. */
+ sym = malloc (sizeof (*sym));
+ sym->name = strdup (name);
+ sym->addr = *addrp;
+ sym->next = symbol_cache;
+ symbol_cache = sym;
+
+ return 1;
+}
projects / deliverable / binutils-gdb.git / blobdiff