/* Remote utility routines for the remote server for GDB.
Copyright (C) 1986, 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
- 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+ 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
Free Software Foundation, Inc.
This file is part of GDB.
#endif
#if USE_WIN32API
-#include <winsock.h>
+#include <winsock2.h>
#endif
+#if __QNX__
+#include <sys/iomgr.h>
+#endif /* __QNX__ */
+
#ifndef HAVE_SOCKLEN_T
typedef int socklen_t;
#endif
# define INVALID_DESCRIPTOR -1
#endif
+/* Extra value for readchar_callback. */
+enum {
+ /* The callback is currently not scheduled. */
+ NOT_SCHEDULED = -1
+};
+
+/* Status of the readchar callback.
+ Either NOT_SCHEDULED or the callback id. */
+static int readchar_callback = NOT_SCHEDULED;
+
+static int readchar (void);
+static void reset_readchar (void);
+static void reschedule (void);
+
/* A cache entry for a successfully looked-up symbol. */
struct sym_cache
{
struct ui_file *gdb_stdlog;
static int remote_desc = INVALID_DESCRIPTOR;
+static int listen_desc = INVALID_DESCRIPTOR;
/* FIXME headerize? */
extern int using_threads;
# define write(fd, buf, len) send (fd, (char *) buf, len, 0)
#endif
+int
+gdb_connected (void)
+{
+ return remote_desc != INVALID_DESCRIPTOR;
+}
+
+static void
+enable_async_notification (int fd)
+{
+#if defined(F_SETFL) && defined (FASYNC)
+ int save_fcntl_flags;
+
+ save_fcntl_flags = fcntl (fd, F_GETFL, 0);
+ fcntl (fd, F_SETFL, save_fcntl_flags | FASYNC);
+#if defined (F_SETOWN)
+ fcntl (fd, F_SETOWN, getpid ());
+#endif
+#endif
+}
+
+static int
+handle_accept_event (int err, gdb_client_data client_data)
+{
+ struct sockaddr_in sockaddr;
+ socklen_t tmp;
+
+ if (debug_threads)
+ fprintf (stderr, "handling possible accept event\n");
+
+ tmp = sizeof (sockaddr);
+ remote_desc = accept (listen_desc, (struct sockaddr *) &sockaddr, &tmp);
+ if (remote_desc == -1)
+ perror_with_name ("Accept failed");
+
+ /* Enable TCP keep alive process. */
+ tmp = 1;
+ setsockopt (remote_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, IPPROTO_TCP, TCP_NODELAY,
+ (char *) &tmp, sizeof (tmp));
+
+#ifndef USE_WIN32API
+ close (listen_desc); /* No longer need this */
+
+ signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbserver simply
+ exits when the remote side dies. */
+#else
+ closesocket (listen_desc); /* No longer need this */
+#endif
+
+ delete_file_handler (listen_desc);
+
+ /* Convert IP address to string. */
+ fprintf (stderr, "Remote debugging from host %s\n",
+ inet_ntoa (sockaddr.sin_addr));
+
+ enable_async_notification (remote_desc);
+
+ /* Register the event loop handler. */
+ add_file_handler (remote_desc, handle_serial_event, NULL);
+
+ /* We have a new GDB connection now. If we were disconnected
+ tracing, there's a window where the target could report a stop
+ event to the event loop, and since we have a connection now, we'd
+ try to send vStopped notifications to GDB. But, don't do that
+ until GDB as selected all-stop/non-stop, and has queried the
+ threads' status ('?'). */
+ target_async (0);
+
+ return 0;
+}
+
/* Open a connection to a remote debugger.
NAME is the filename used for communication. */
void
remote_open (char *name)
{
-#if defined(F_SETFL) && defined (FASYNC)
- int save_fcntl_flags;
-#endif
char *port_str;
port_str = strchr (name, ':');
#endif
fprintf (stderr, "Remote debugging using %s\n", name);
-#endif /* USE_WIN32API */
transport_is_reliable = 0;
+
+ enable_async_notification (remote_desc);
+
+ /* Register the event loop handler. */
+ add_file_handler (remote_desc, handle_serial_event, NULL);
+#endif /* USE_WIN32API */
}
else
{
int port;
struct sockaddr_in sockaddr;
socklen_t tmp;
- int tmp_desc;
char *port_end;
port = strtoul (port_str + 1, &port_end, 10);
}
#endif
- tmp_desc = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
- if (tmp_desc < 0)
+ listen_desc = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
+ if (listen_desc == -1)
perror_with_name ("Can't open socket");
/* Allow rapid reuse of this port. */
tmp = 1;
- setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp,
+ setsockopt (listen_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp,
sizeof (tmp));
sockaddr.sin_family = PF_INET;
sockaddr.sin_port = htons (port);
sockaddr.sin_addr.s_addr = INADDR_ANY;
- if (bind (tmp_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr))
- || listen (tmp_desc, 1))
+ if (bind (listen_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr))
+ || listen (listen_desc, 1))
perror_with_name ("Can't bind address");
/* If port is zero, a random port will be selected, and the
if (port == 0)
{
socklen_t len = sizeof (sockaddr);
- if (getsockname (tmp_desc, (struct sockaddr *) &sockaddr, &len) < 0
+ if (getsockname (listen_desc, (struct sockaddr *) &sockaddr, &len) < 0
|| len < sizeof (sockaddr))
perror_with_name ("Can't determine port");
port = ntohs (sockaddr.sin_port);
fprintf (stderr, "Listening on port %d\n", port);
fflush (stderr);
- tmp = sizeof (sockaddr);
- remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp);
- if (remote_desc == -1)
- perror_with_name ("Accept failed");
-
- /* Enable TCP keep alive process. */
- tmp = 1;
- setsockopt (remote_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, IPPROTO_TCP, TCP_NODELAY,
- (char *) &tmp, sizeof (tmp));
-
-
-#ifndef USE_WIN32API
- 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. */
-#else
- closesocket (tmp_desc); /* No longer need this */
-#endif
-
- /* Convert IP address to string. */
- fprintf (stderr, "Remote debugging from host %s\n",
- inet_ntoa (sockaddr.sin_addr));
+ /* Register the event loop handler. */
+ add_file_handler (listen_desc, handle_accept_event, NULL);
transport_is_reliable = 1;
}
-
-#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
-
- /* Register the event loop handler. */
- add_file_handler (remote_desc, handle_serial_event, NULL);
}
void
#else
close (remote_desc);
#endif
+ remote_desc = INVALID_DESCRIPTOR;
+
+ reset_readchar ();
}
/* Convert hex digit A to a number. */
int i;
unsigned char csum = 0;
char *buf2;
- char buf3[1];
char *p;
+ int cc;
buf2 = xmalloc (PBUFSIZ);
do
{
- int cc;
-
if (write (remote_desc, buf2, p - buf2) != p - buf2)
{
perror ("putpkt(write)");
fprintf (stderr, "putpkt (\"%s\"); [looking for ack]\n", buf2);
fflush (stderr);
}
- cc = read (remote_desc, buf3, 1);
- if (remote_debug)
- {
- fprintf (stderr, "[received '%c' (0x%x)]\n", buf3[0], buf3[0]);
- fflush (stderr);
- }
- if (cc <= 0)
- {
- if (cc == 0)
- fprintf (stderr, "putpkt(read): Got EOF\n");
- else
- perror ("putpkt(read)");
+ cc = readchar ();
+ if (cc < 0)
+ {
free (buf2);
return -1;
}
+ if (remote_debug)
+ {
+ fprintf (stderr, "[received '%c' (0x%x)]\n", cc, cc);
+ fflush (stderr);
+ }
+
/* Check for an input interrupt while we're here. */
- if (buf3[0] == '\003' && current_inferior != NULL)
+ if (cc == '\003' && current_inferior != NULL)
(*the_target->request_interrupt) ();
}
- while (buf3[0] != '+');
+ while (cc != '+');
free (buf2);
return 1; /* Success! */
/* Come here when we get an input interrupt from the remote side. This
interrupt should only be active while we are waiting for the child to do
- something. About the only thing that should come through is a ^C, which
+ something. Thus this assumes readchar:bufcnt is 0.
+ About the only thing that should come through is a ^C, which
will cause us to request child interruption. */
static void
#endif
}
+#ifdef __QNX__
+static void
+nto_comctrl (int enable)
+{
+ struct sigevent event;
+
+ if (enable)
+ {
+ event.sigev_notify = SIGEV_SIGNAL_THREAD;
+ event.sigev_signo = SIGIO;
+ event.sigev_code = 0;
+ event.sigev_value.sival_ptr = NULL;
+ event.sigev_priority = -1;
+ ionotify (remote_desc, _NOTIFY_ACTION_POLLARM, _NOTIFY_COND_INPUT,
+ &event);
+ }
+ else
+ ionotify (remote_desc, _NOTIFY_ACTION_POLL, _NOTIFY_COND_INPUT, NULL);
+}
+#endif /* __QNX__ */
+
+
/* Current state of asynchronous I/O. */
static int async_io_enabled;
signal (SIGIO, input_interrupt);
#endif
async_io_enabled = 1;
+#ifdef __QNX__
+ nto_comctrl (1);
+#endif /* __QNX__ */
}
/* Disable asynchronous I/O. */
signal (SIGIO, SIG_IGN);
#endif
async_io_enabled = 0;
+#ifdef __QNX__
+ nto_comctrl (0);
+#endif /* __QNX__ */
+
}
void
unblock_async_io ();
}
+/* Internal buffer used by readchar.
+ These are global to readchar because reschedule_remote needs to be
+ able to tell whether the buffer is empty. */
+
+static unsigned char readchar_buf[BUFSIZ];
+static int readchar_bufcnt = 0;
+static unsigned char *readchar_bufp;
+
/* Returns next char from remote GDB. -1 if error. */
static int
readchar (void)
{
- static unsigned char buf[BUFSIZ];
- static int bufcnt = 0;
- static unsigned char *bufp;
+ int ch;
- if (bufcnt-- > 0)
- return *bufp++;
+ if (readchar_bufcnt == 0)
+ {
+ readchar_bufcnt = read (remote_desc, readchar_buf, sizeof (readchar_buf));
- bufcnt = read (remote_desc, buf, sizeof (buf));
+ if (readchar_bufcnt <= 0)
+ {
+ if (readchar_bufcnt == 0)
+ fprintf (stderr, "readchar: Got EOF\n");
+ else
+ perror ("readchar");
- if (bufcnt <= 0)
- {
- if (bufcnt == 0)
- fprintf (stderr, "readchar: Got EOF\n");
- else
- perror ("readchar");
+ return -1;
+ }
- return -1;
+ readchar_bufp = readchar_buf;
}
- bufp = buf;
- bufcnt--;
- return *bufp++;
+ readchar_bufcnt--;
+ ch = *readchar_bufp++;
+ reschedule ();
+ return ch;
+}
+
+/* Reset the readchar state machine. */
+
+static void
+reset_readchar (void)
+{
+ readchar_bufcnt = 0;
+ if (readchar_callback != NOT_SCHEDULED)
+ {
+ delete_callback_event (readchar_callback);
+ readchar_callback = NOT_SCHEDULED;
+ }
+}
+
+/* Process remaining data in readchar_buf. */
+
+static int
+process_remaining (void *context)
+{
+ int res;
+
+ /* This is a one-shot event. */
+ readchar_callback = NOT_SCHEDULED;
+
+ if (readchar_bufcnt > 0)
+ res = handle_serial_event (0, NULL);
+ else
+ res = 0;
+
+ return res;
+}
+
+/* If there is still data in the buffer, queue another event to process it,
+ we can't sleep in select yet. */
+
+static void
+reschedule (void)
+{
+ if (readchar_bufcnt > 0 && readchar_callback == NOT_SCHEDULED)
+ readchar_callback = append_callback_event (process_remaining, NULL);
}
/* Read a packet from the remote machine, with error checking,
}
void
-convert_int_to_ascii (unsigned char *from, char *to, int n)
+convert_int_to_ascii (const unsigned char *from, char *to, int n)
{
int nib;
int ch;
void
-convert_ascii_to_int (char *from, unsigned char *to, int n)
+convert_ascii_to_int (const char *from, unsigned char *to, int n)
{
int nib1, nib2;
while (n--)
}
static char *
-outreg (int regno, char *buf)
+outreg (struct regcache *regcache, int regno, char *buf)
{
if ((regno >> 12) != 0)
*buf++ = tohex ((regno >> 12) & 0xf);
*buf++ = tohex ((regno >> 4) & 0xf);
*buf++ = tohex (regno & 0xf);
*buf++ = ':';
- collect_register_as_string (regno, buf);
+ collect_register_as_string (regcache, regno, buf);
buf += 2 * register_size (regno);
*buf++ = ';';
{
struct thread_info *saved_inferior;
const char **regp;
+ struct regcache *regcache;
sprintf (buf, "T%02x", status->value.sig);
buf += strlen (buf);
saved_inferior = current_inferior;
- current_inferior = find_thread_pid (ptid);
+ current_inferior = find_thread_ptid (ptid);
+
+ regcache = get_thread_regcache (current_inferior, 1);
if (the_target->stopped_by_watchpoint != NULL
&& (*the_target->stopped_by_watchpoint) ())
while (*regp)
{
- buf = outreg (find_regno (*regp), buf);
+ buf = outreg (regcache, find_regno (*regp), buf);
regp ++;
}
+ *buf = '\0';
/* Formerly, if the debugger had not used any thread features
we would not burden it with a thread status response. This
gdbserver to know what inferior_ptid is. */
if (1 || !ptid_equal (general_thread, ptid))
{
+ int core = -1;
/* In non-stop, don't change the general thread behind
GDB's back. */
if (!non_stop)
buf = write_ptid (buf, ptid);
strcat (buf, ";");
buf += strlen (buf);
+
+ if (the_target->core_of_thread)
+ core = (*the_target->core_of_thread) (ptid);
+ if (core != -1)
+ {
+ sprintf (buf, "core:");
+ buf += strlen (buf);
+ sprintf (buf, "%x", core);
+ strcat (buf, ";");
+ buf += strlen (buf);
+ }
}
}
void
decode_M_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr,
- unsigned char *to)
+ unsigned char **to_p)
{
int i = 0;
char ch;
*len_ptr |= fromhex (ch) & 0x0f;
}
- convert_ascii_to_int (&from[i++], to, *len_ptr);
+ if (*to_p == NULL)
+ *to_p = xmalloc (*len_ptr);
+
+ convert_ascii_to_int (&from[i++], *to_p, *len_ptr);
}
int
decode_X_packet (char *from, int packet_len, CORE_ADDR *mem_addr_ptr,
- unsigned int *len_ptr, unsigned char *to)
+ unsigned int *len_ptr, unsigned char **to_p)
{
int i = 0;
char ch;
*len_ptr |= fromhex (ch) & 0x0f;
}
+ if (*to_p == NULL)
+ *to_p = xmalloc (*len_ptr);
+
if (remote_unescape_input ((const gdb_byte *) &from[i], packet_len - i,
- to, *len_ptr) != *len_ptr)
+ *to_p, *len_ptr) != *len_ptr)
return -1;
return 0;
*symcache_p = NULL;
}
-/* Ask GDB for the address of NAME, and return it in ADDRP if found.
+/* Get the address of NAME, and return it in ADDRP if found. if
+ MAY_ASK_GDB is false, assume symbol cache misses are failures.
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)
+look_up_one_symbol (const char *name, CORE_ADDR *addrp, int may_ask_gdb)
{
char own_buf[266], *p, *q;
int len;
return 1;
}
- /* If we've passed the call to thread_db_look_up_symbols, then
- anything not in the cache must not exist; we're not interested
- in any libraries loaded after that point, only in symbols in
- libpthread.so. It might not be an appropriate time to look
- up a symbol, e.g. while we're trying to fetch registers. */
- if (proc->all_symbols_looked_up)
+ /* It might not be an appropriate time to look up a symbol,
+ e.g. while we're trying to fetch registers. */
+ if (!may_ask_gdb)
return 0;
/* Send the request. */
return 1;
}
+/* Relocate an instruction to execute at a different address. OLDLOC
+ is the address in the inferior memory where the instruction to
+ relocate is currently at. On input, TO points to the destination
+ where we want the instruction to be copied (and possibly adjusted)
+ to. On output, it points to one past the end of the resulting
+ instruction(s). The effect of executing the instruction at TO
+ shall be the same as if executing it at FROM. For example, call
+ instructions that implicitly push the return address on the stack
+ should be adjusted to return to the instruction after OLDLOC;
+ relative branches, and other PC-relative instructions need the
+ offset adjusted; etc. Returns 0 on success, -1 on failure. */
+
+int
+relocate_instruction (CORE_ADDR *to, CORE_ADDR oldloc)
+{
+ char own_buf[266];
+ int len;
+ ULONGEST written = 0;
+
+ /* Send the request. */
+ strcpy (own_buf, "qRelocInsn:");
+ sprintf (own_buf, "qRelocInsn:%s;%s", paddress (oldloc),
+ paddress (*to));
+ if (putpkt (own_buf) < 0)
+ return -1;
+
+ /* FIXME: Eventually add buffer overflow checking (to getpkt?) */
+ len = getpkt (own_buf);
+ if (len < 0)
+ return -1;
+
+ /* We ought to handle pretty much any packet at this point while we
+ wait for the qRelocInsn "response". That requires re-entering
+ the main loop. For now, this is an adequate approximation; allow
+ GDB to access memory. */
+ while (own_buf[0] == 'm' || own_buf[0] == 'M' || own_buf[0] == 'X')
+ {
+ CORE_ADDR mem_addr;
+ unsigned char *mem_buf = NULL;
+ unsigned int mem_len;
+
+ if (own_buf[0] == 'm')
+ {
+ decode_m_packet (&own_buf[1], &mem_addr, &mem_len);
+ mem_buf = xmalloc (mem_len);
+ if (read_inferior_memory (mem_addr, mem_buf, mem_len) == 0)
+ convert_int_to_ascii (mem_buf, own_buf, mem_len);
+ else
+ write_enn (own_buf);
+ }
+ else if (own_buf[0] == 'X')
+ {
+ if (decode_X_packet (&own_buf[1], len - 1, &mem_addr,
+ &mem_len, &mem_buf) < 0
+ || write_inferior_memory (mem_addr, mem_buf, mem_len) != 0)
+ write_enn (own_buf);
+ else
+ write_ok (own_buf);
+ }
+ else
+ {
+ decode_M_packet (&own_buf[1], &mem_addr, &mem_len, &mem_buf);
+ if (write_inferior_memory (mem_addr, mem_buf, mem_len) == 0)
+ write_ok (own_buf);
+ else
+ write_enn (own_buf);
+ }
+ free (mem_buf);
+ if (putpkt (own_buf) < 0)
+ return -1;
+ len = getpkt (own_buf);
+ if (len < 0)
+ return -1;
+ }
+
+ if (own_buf[0] == 'E')
+ {
+ warning ("An error occurred while relocating an instruction: %s\n",
+ own_buf);
+ return -1;
+ }
+
+ if (strncmp (own_buf, "qRelocInsn:", strlen ("qRelocInsn:")) != 0)
+ {
+ warning ("Malformed response to qRelocInsn, ignoring: %s\n",
+ own_buf);
+ return -1;
+ }
+
+ unpack_varlen_hex (own_buf + strlen ("qRelocInsn:"), &written);
+
+ *to += written;
+ return 0;
+}
+
void
monitor_output (const char *msg)
{
prev = f + 1;
}
break;
+ case 'd':
+ {
+ int i = va_arg (ap, int);
+ char b[sizeof ("4294967295")];
+
+ buffer_grow (buffer, prev, f - prev - 1);
+ sprintf (b, "%d", i);
+ buffer_grow_str (buffer, b);
+ prev = f + 1;
+ }
}
percent = 0;
}
projects / deliverable / binutils-gdb.git / blobdiff