/* 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
- 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.
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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "server.h"
#include "terminal.h"
#include <stdio.h>
#include <string.h>
+#if HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
+#endif
+#if HAVE_SYS_FILE_H
#include <sys/file.h>
+#endif
+#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
+#if HAVE_SIGNAL_H
#include <signal.h>
+#endif
+#if HAVE_FCNTL_H
#include <fcntl.h>
+#endif
#include <sys/time.h>
+#if HAVE_UNISTD_H
#include <unistd.h>
+#endif
+#if HAVE_ARPA_INET_H
#include <arpa/inet.h>
+#endif
+#include <sys/stat.h>
+#if HAVE_ERRNO_H
+#include <errno.h>
+#endif
+
+#if USE_WIN32API
+#include <winsock.h>
+#endif
#ifndef HAVE_SOCKLEN_T
typedef int socklen_t;
#endif
+#if USE_WIN32API
+# define INVALID_DESCRIPTOR INVALID_SOCKET
+#else
+# define INVALID_DESCRIPTOR -1
+#endif
+
/* A cache entry for a successfully looked-up symbol. */
struct sym_cache
{
int remote_debug = 0;
struct ui_file *gdb_stdlog;
-static int remote_desc;
+static int remote_desc = INVALID_DESCRIPTOR;
/* FIXME headerize? */
extern int using_threads;
extern int debug_threads;
+#ifdef USE_WIN32API
+# define read(fd, buf, len) recv (fd, (char *) buf, len, 0)
+# define write(fd, buf, len) send (fd, (char *) 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");
|| listen (tmp_desc, 1))
perror_with_name ("Can't bind address");
+ /* If port is zero, a random port will be selected, and the
+ fprintf below needs to know what port was selected. */
+ if (port == 0)
+ {
+ socklen_t len = sizeof (sockaddr);
+ if (getsockname (tmp_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);
/* Enable TCP keep alive process. */
tmp = 1;
- setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof (tmp));
+ setsockopt (remote_desc, SOL_SOCKET, SO_KEEPALIVE,
+ (char *) &tmp, sizeof (tmp));
/* Tell TCP not to delay small packets. This greatly speeds up
interactive response. */
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);
if (write (remote_desc, buf2, p - buf2) != p - buf2)
{
perror ("putpkt(write)");
+ free (buf2);
return -1;
}
/* Check for an input interrupt while we're here. */
if (buf3[0] == '\003')
- (*the_target->send_signal) (SIGINT);
+ (*the_target->request_interrupt) ();
}
while (buf3[0] != '+');
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));
+}
+
/* 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
- will cause us to send a SIGINT to the child. */
+ will cause us to request child interruption. */
static void
input_interrupt (int unused)
{
int cc;
char c = 0;
-
+
cc = read (remote_desc, &c, 1);
if (cc != 1 || c != '\003')
cc, c, c);
return;
}
-
- (*the_target->send_signal) (SIGINT);
+
+ (*the_target->request_interrupt) ();
}
}
+/* Check if the remote side sent us an interrupt request (^C). */
+void
+check_remote_input_interrupt_request (void)
+{
+ /* This function may be called before establishing communications,
+ therefore we need to validate the remote descriptor. */
+
+ if (remote_desc == INVALID_DESCRIPTOR)
+ return;
+
+ input_interrupt (0);
+}
+
+/* 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));
bufp = buf;
bufcnt--;
- return *bufp++ & 0x7f;
+ return *bufp++;
}
/* Read a packet from the remote machine, with error checking,
}
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;
old_thread_from_wait = thread_from_wait;
}
}
+
+ if (dlls_changed)
+ {
+ strcpy (buf, "library:;");
+ buf += strlen (buf);
+ dlls_changed = 0;
+ }
}
/* For W and X, we're done. */
*buf++ = 0;
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;
+}
+
+/* Decode a qXfer write request. */
+int
+decode_xfer_write (char *buf, int packet_len, char **annex, CORE_ADDR *offset,
+ unsigned int *len, unsigned char *data)
+{
+ char ch;
+
+ /* Extract and NUL-terminate the annex. */
+ *annex = buf;
+ while (*buf && *buf != ':')
+ buf++;
+ if (*buf == '\0')
+ return -1;
+ *buf++ = 0;
+
+ /* Extract the offset. */
+ *offset = 0;
+ while ((ch = *buf++) != ':')
+ {
+ *offset = *offset << 4;
+ *offset |= fromhex (ch) & 0x0f;
+ }
+
+ /* Get encoded data. */
+ packet_len -= buf - *annex;
+ *len = remote_unescape_input ((const gdb_byte *) buf, packet_len,
+ data, packet_len);
+ 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. */
if (len < 0)
return -1;
+ /* We ought to handle pretty much any packet at this point while we
+ wait for the qSymbol "response". That requires re-entering the
+ main loop. For now, this is an adequate approximation; allow
+ GDB to read from memory while it figures out the address of the
+ symbol. */
+ while (own_buf[0] == 'm')
+ {
+ CORE_ADDR mem_addr;
+ unsigned char *mem_buf;
+ unsigned int mem_len;
+
+ decode_m_packet (&own_buf[1], &mem_addr, &mem_len);
+ mem_buf = malloc (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);
+ free (mem_buf);
+ if (putpkt (own_buf) < 0)
+ return -1;
+ 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);
- }
-
+ warning ("Malformed response to qSymbol, ignoring: %s\n", own_buf);
return -1;
}
return 1;
}
+
+void
+monitor_output (const char *msg)
+{
+ char *buf = malloc (strlen (msg) * 2 + 2);
+
+ buf[0] = 'O';
+ hexify (buf + 1, msg, 0);
+
+ putpkt (buf);
+ free (buf);
+}
+
+/* Return a malloc allocated string with special characters from TEXT
+ replaced by entity references. */
+
+char *
+xml_escape_text (const char *text)
+{
+ char *result;
+ int i, special;
+
+ /* Compute the length of the result. */
+ for (i = 0, special = 0; text[i] != '\0'; i++)
+ switch (text[i])
+ {
+ case '\'':
+ case '\"':
+ special += 5;
+ break;
+ case '&':
+ special += 4;
+ break;
+ case '<':
+ case '>':
+ special += 3;
+ break;
+ default:
+ break;
+ }
+
+ /* Expand the result. */
+ result = malloc (i + special + 1);
+ for (i = 0, special = 0; text[i] != '\0'; i++)
+ switch (text[i])
+ {
+ case '\'':
+ strcpy (result + i + special, "'");
+ special += 5;
+ break;
+ case '\"':
+ strcpy (result + i + special, """);
+ special += 5;
+ break;
+ case '&':
+ strcpy (result + i + special, "&");
+ special += 4;
+ break;
+ case '<':
+ strcpy (result + i + special, "<");
+ special += 3;
+ break;
+ case '>':
+ strcpy (result + i + special, ">");
+ special += 3;
+ break;
+ default:
+ result[i + special] = text[i];
+ break;
+ }
+ result[i + special] = '\0';
+
+ return result;
+}
projects / deliverable / binutils-gdb.git / blobdiff