/* 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
- Free Software Foundation, Inc.
+ Copyright (C) 1986, 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
+ 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
This file is part of GDB.
Boston, MA 02110-1301, USA. */
#include "server.h"
+#if HAVE_TERMINAL_H
#include "terminal.h"
+#endif
#include <stdio.h>
#include <string.h>
+#if HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
+#endif
#include <sys/file.h>
+#if HAVE_NETINET_IN_H
#include <netinet/in.h>
+#endif
+#if HAVE_SYS_SOCKET_H
#include <sys/socket.h>
+#endif
+#if HAVE_NETDB_H
#include <netdb.h>
+#endif
+#if HAVE_NETINET_TCP_H
#include <netinet/tcp.h>
+#endif
+#if HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
+#endif
#include <signal.h>
#include <fcntl.h>
#include <sys/time.h>
#include <unistd.h>
+#if HAVE_ARPA_INET_H
#include <arpa/inet.h>
+#endif
+#include <sys/stat.h>
+#include <errno.h>
+
+#if USE_WIN32API
+#include <winsock.h>
+#endif
#ifndef HAVE_SOCKLEN_T
typedef int socklen_t;
/* The symbol cache. */
static struct sym_cache *symbol_cache;
+/* If this flag has been set, assume cache misses are
+ failures. */
+int all_symbols_looked_up;
+
int remote_debug = 0;
struct ui_file *gdb_stdlog;
extern int using_threads;
extern int debug_threads;
+#ifdef USE_WIN32API
+# define read(fd, buf, len) recv (fd, buf, len, 0)
+# define write(fd, buf, len) send (fd, buf, len, 0)
+#endif
+
/* 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;
-
- if (!strchr (name, ':'))
+#endif
+ char *port_str;
+
+ port_str = strchr (name, ':');
+ if (port_str == NULL)
{
- remote_desc = open (name, O_RDWR);
+#ifdef USE_WIN32API
+ error ("Only <host>:<port> is supported on this platform.");
+#else
+ struct stat statbuf;
+
+ if (stat (name, &statbuf) == 0
+ && (S_ISCHR (statbuf.st_mode) || S_ISFIFO (statbuf.st_mode)))
+ remote_desc = open (name, O_RDWR);
+ else
+ {
+ errno = EINVAL;
+ remote_desc = -1;
+ }
+
if (remote_desc < 0)
perror_with_name ("Could not open remote device");
#endif
fprintf (stderr, "Remote debugging using %s\n", name);
+#endif /* USE_WIN32API */
}
else
{
+#ifdef USE_WIN32API
+ static int winsock_initialized;
+#endif
char *port_str;
int port;
struct sockaddr_in sockaddr;
port = atoi (port_str + 1);
- tmp_desc = socket (PF_INET, SOCK_STREAM, 0);
+#ifdef USE_WIN32API
+ if (!winsock_initialized)
+ {
+ WSADATA wsad;
+
+ WSAStartup (MAKEWORD (1, 0), &wsad);
+ winsock_initialized = 1;
+ }
+#endif
+
+ tmp_desc = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
if (tmp_desc < 0)
perror_with_name ("Can't open socket");
perror_with_name ("Can't bind address");
fprintf (stderr, "Listening on port %d\n", port);
+ fflush (stderr);
tmp = sizeof (sockaddr);
remote_desc = accept (tmp_desc, (struct sockaddr *) &sockaddr, &tmp);
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",
void
remote_close (void)
{
+#ifdef USE_WIN32API
+ closesocket (remote_desc);
+#else
close (remote_desc);
+#endif
}
/* Convert hex digit A to a number. */
return i;
}
-static void
+void
decode_address (CORE_ADDR *addrp, const char *start, int len)
{
CORE_ADDR addr;
*addrp = addr;
}
+const char *
+decode_address_to_semicolon (CORE_ADDR *addrp, const char *start)
+{
+ const char *end;
+
+ end = start;
+ while (*end != '\0' && *end != ';')
+ end++;
+
+ decode_address (addrp, start, end - start);
+
+ if (*end == ';')
+ end++;
+ return end;
+}
+
/* Convert number NIB to a hex digit. */
static int
return i;
}
+/* Convert BUFFER, binary data at least LEN bytes long, into escaped
+ binary data in OUT_BUF. Set *OUT_LEN to the length of the data
+ encoded in OUT_BUF, and return the number of bytes in OUT_BUF
+ (which may be more than *OUT_LEN due to escape characters). The
+ total number of bytes in the output buffer will be at most
+ OUT_MAXLEN. */
+
+int
+remote_escape_output (const gdb_byte *buffer, int len,
+ gdb_byte *out_buf, int *out_len,
+ int out_maxlen)
+{
+ int input_index, output_index;
+
+ output_index = 0;
+ for (input_index = 0; input_index < len; input_index++)
+ {
+ gdb_byte b = buffer[input_index];
+
+ if (b == '$' || b == '#' || b == '}' || b == '*')
+ {
+ /* These must be escaped. */
+ if (output_index + 2 > out_maxlen)
+ break;
+ out_buf[output_index++] = '}';
+ out_buf[output_index++] = b ^ 0x20;
+ }
+ else
+ {
+ if (output_index + 1 > out_maxlen)
+ break;
+ out_buf[output_index++] = b;
+ }
+ }
+
+ *out_len = input_index;
+ return output_index;
+}
+
+/* Convert BUFFER, escaped data LEN bytes long, into binary data
+ in OUT_BUF. Return the number of bytes written to OUT_BUF.
+ Raise an error if the total number of bytes exceeds OUT_MAXLEN.
+
+ This function reverses remote_escape_output. It allows more
+ escaped characters than that function does, in particular because
+ '*' must be escaped to avoid the run-length encoding processing
+ in reading packets. */
+
+static int
+remote_unescape_input (const gdb_byte *buffer, int len,
+ gdb_byte *out_buf, int out_maxlen)
+{
+ int input_index, output_index;
+ int escaped;
+
+ output_index = 0;
+ escaped = 0;
+ for (input_index = 0; input_index < len; input_index++)
+ {
+ gdb_byte b = buffer[input_index];
+
+ if (output_index + 1 > out_maxlen)
+ error ("Received too much data from the target.");
+
+ if (escaped)
+ {
+ out_buf[output_index++] = b ^ 0x20;
+ escaped = 0;
+ }
+ else if (b == '}')
+ escaped = 1;
+ else
+ out_buf[output_index++] = b;
+ }
+
+ if (escaped)
+ error ("Unmatched escape character in target response.");
+
+ return output_index;
+}
+
+/* Look for a sequence of characters which can be run-length encoded.
+ If there are any, update *CSUM and *P. Otherwise, output the
+ single character. Return the number of characters consumed. */
+
+static int
+try_rle (char *buf, int remaining, unsigned char *csum, char **p)
+{
+ int n;
+
+ /* Always output the character. */
+ *csum += buf[0];
+ *(*p)++ = buf[0];
+
+ /* Don't go past '~'. */
+ if (remaining > 97)
+ remaining = 97;
+
+ for (n = 1; n < remaining; n++)
+ if (buf[n] != buf[0])
+ break;
+
+ /* N is the index of the first character not the same as buf[0].
+ buf[0] is counted twice, so by decrementing N, we get the number
+ of characters the RLE sequence will replace. */
+ n--;
+
+ if (n < 3)
+ return 1;
+
+ /* Skip the frame characters. The manual says to skip '+' and '-'
+ also, but there's no reason to. Unfortunately these two unusable
+ characters double the encoded length of a four byte zero
+ value. */
+ while (n + 29 == '$' || n + 29 == '#')
+ n--;
+
+ *csum += '*';
+ *(*p)++ = '*';
+ *csum += n + 29;
+ *(*p)++ = n + 29;
+
+ return n + 1;
+}
+
/* Send a packet to the remote machine, with error checking.
- The data of the packet is in BUF. Returns >= 0 on success, -1 otherwise. */
+ The data of the packet is in BUF, and the length of the
+ packet is in CNT. Returns >= 0 on success, -1 otherwise. */
int
-putpkt (char *buf)
+putpkt_binary (char *buf, int cnt)
{
int i;
unsigned char csum = 0;
char *buf2;
char buf3[1];
- int cnt = strlen (buf);
char *p;
buf2 = malloc (PBUFSIZ);
p = buf2;
*p++ = '$';
- for (i = 0; i < cnt; i++)
- {
- csum += buf[i];
- *p++ = buf[i];
- }
+ for (i = 0; i < cnt;)
+ i += try_rle (buf + i, cnt - i, &csum, &p);
+
*p++ = '#';
*p++ = tohex ((csum >> 4) & 0xf);
*p++ = tohex (csum & 0xf);
return 1; /* Success! */
}
+/* Send a packet to the remote machine, with error checking. The data
+ of the packet is in BUF, and the packet should be a NUL-terminated
+ string. Returns >= 0 on success, -1 otherwise. */
+
+int
+putpkt (char *buf)
+{
+ return putpkt_binary (buf, strlen (buf));
+}
+
+#ifndef USE_WIN32API
+
/* 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
(*the_target->send_signal) (SIGINT);
}
}
+#endif
+
+/* 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. */
void
block_async_io (void)
{
+#ifndef USE_WIN32API
sigset_t sigio_set;
sigemptyset (&sigio_set);
sigaddset (&sigio_set, SIGIO);
sigprocmask (SIG_BLOCK, &sigio_set, NULL);
+#endif
}
void
unblock_async_io (void)
{
+#ifndef USE_WIN32API
sigset_t sigio_set;
sigemptyset (&sigio_set);
sigaddset (&sigio_set, SIGIO);
sigprocmask (SIG_UNBLOCK, &sigio_set, NULL);
+#endif
}
-/* 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;
if (async_io_enabled)
return;
+#ifndef USE_WIN32API
signal (SIGIO, input_interrupt);
+#endif
async_io_enabled = 1;
}
if (!async_io_enabled)
return;
+#ifndef USE_WIN32API
signal (SIGIO, SIG_IGN);
+#endif
async_io_enabled = 0;
}
static int
readchar (void)
{
- static char buf[BUFSIZ];
+ static unsigned char buf[BUFSIZ];
static int bufcnt = 0;
- static char *bufp;
+ static unsigned char *bufp;
if (bufcnt-- > 0)
- return *bufp++ & 0x7f;
+ return *bufp++;
bufcnt = read (remote_desc, buf, sizeof (buf));
}
void
-prepare_resume_reply (char *buf, char status, unsigned char signo)
+prepare_resume_reply (char *buf, char status, unsigned char sig)
{
- int nib, sig;
+ int nib;
*buf++ = status;
- sig = (int)target_signal_from_host (signo);
-
nib = ((sig & 0xf0) >> 4);
*buf++ = tohex (nib);
nib = sig & 0x0f;
if (using_threads)
{
+ unsigned int gdb_id_from_wait;
+
/* FIXME right place to set this? */
thread_from_wait = ((struct inferior_list_entry *)current_inferior)->id;
- unsigned int gdb_id_from_wait = thread_to_gdb_id (current_inferior);
+ gdb_id_from_wait = thread_to_gdb_id (current_inferior);
if (debug_threads)
fprintf (stderr, "Writing resume reply for %ld\n\n", thread_from_wait);
convert_ascii_to_int (&from[i++], to, *len_ptr);
}
+int
+decode_X_packet (char *from, int packet_len, CORE_ADDR *mem_addr_ptr,
+ unsigned int *len_ptr, unsigned char *to)
+{
+ int i = 0;
+ char ch;
+ *mem_addr_ptr = *len_ptr = 0;
+
+ while ((ch = from[i++]) != ',')
+ {
+ *mem_addr_ptr = *mem_addr_ptr << 4;
+ *mem_addr_ptr |= fromhex (ch) & 0x0f;
+ }
+
+ while ((ch = from[i++]) != ':')
+ {
+ *len_ptr = *len_ptr << 4;
+ *len_ptr |= fromhex (ch) & 0x0f;
+ }
+
+ if (remote_unescape_input ((const gdb_byte *) &from[i], packet_len - i,
+ to, *len_ptr) != *len_ptr)
+ return -1;
+
+ return 0;
+}
+
/* 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. */
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 (all_symbols_looked_up)
+ return 0;
+
/* Send the request. */
strcpy (own_buf, "qSymbol:");
hexify (own_buf + strlen ("qSymbol:"), name, strlen (name));
projects / deliverable / binutils-gdb.git / blobdiff