/* Remote utility routines for the remote server for GDB.
- Copyright (C) 1986, 1989, 1993 Free Software Foundation, Inc.
+ Copyright (C) 1986, 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
+ 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
+ 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 3 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
-#include "defs.h"
+#include "server.h"
+#include "terminal.h"
+#include "target.h"
#include <stdio.h>
-#include <signal.h>
-#include <sys/wait.h>
+#include <string.h>
+#if HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
-#include <a.out.h>
+#endif
+#if HAVE_SYS_FILE_H
#include <sys/file.h>
-#include <sgtty.h>
+#endif
+#if HAVE_NETINET_IN_H
#include <netinet/in.h>
-#include <arpa/inet.h>
+#endif
+#if HAVE_SYS_SOCKET_H
#include <sys/socket.h>
-#include <sys/types.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 <winsock2.h>
+#endif
+
+#if __QNX__
+#include <sys/iomgr.h>
+#endif /* __QNX__ */
+
+#ifndef HAVE_SOCKLEN_T
+typedef int socklen_t;
+#endif
+
+#ifndef IN_PROCESS_AGENT
+
+#if USE_WIN32API
+# define INVALID_DESCRIPTOR INVALID_SOCKET
+#else
+# 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);
-extern int remote_desc;
-extern int remote_debugging;
+/* A cache entry for a successfully looked-up symbol. */
+struct sym_cache
+{
+ char *name;
+ CORE_ADDR addr;
+ struct sym_cache *next;
+};
+
+int remote_debug = 0;
+struct ui_file *gdb_stdlog;
-void remote_open ();
-void remote_send ();
-void putpkt ();
-void getpkt ();
+static gdb_fildes_t remote_desc = INVALID_DESCRIPTOR;
+static gdb_fildes_t listen_desc = INVALID_DESCRIPTOR;
-void write_ok ();
-void write_enn ();
-void convert_ascii_to_int ();
-void convert_int_to_ascii ();
-void prepare_resume_reply ();
+/* FIXME headerize? */
+extern int using_threads;
+extern int debug_threads;
+
+/* If true, then GDB has requested noack mode. */
+int noack_mode = 0;
+/* If true, then we tell GDB to use noack mode by default. */
+int transport_is_reliable = 0;
+
+#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
+
+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 (name, from_tty)
- char *name;
- int from_tty;
+remote_open (char *name)
{
- struct sgttyb sg;
-
- remote_debugging = 0;
+ char *port_str;
- if (!strchr (name, ':'))
+ 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");
- ioctl (remote_desc, TIOCGETP, &sg);
- sg.sg_flags = RAW;
- ioctl (remote_desc, TIOCSETP, &sg);
+#ifdef HAVE_TERMIOS
+ {
+ struct termios 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 |= CLOCAL | CS8;
+ termios.c_cc[VMIN] = 1;
+ termios.c_cc[VTIME] = 0;
+
+ tcsetattr (remote_desc, TCSANOW, &termios);
+ }
+#endif
+
+#ifdef HAVE_TERMIO
+ {
+ struct termio termio;
+ ioctl (remote_desc, TCGETA, &termio);
+
+ termio.c_iflag = 0;
+ termio.c_oflag = 0;
+ termio.c_lflag = 0;
+ termio.c_cflag &= ~(CSIZE | PARENB);
+ termio.c_cflag |= CLOCAL | CS8;
+ termio.c_cc[VMIN] = 1;
+ termio.c_cc[VTIME] = 0;
+
+ ioctl (remote_desc, TCSETA, &termio);
+ }
+#endif
+
+#ifdef HAVE_SGTTY
+ {
+ struct sgttyb sg;
+
+ ioctl (remote_desc, TIOCGETP, &sg);
+ sg.sg_flags = RAW;
+ ioctl (remote_desc, TIOCSETP, &sg);
+ }
+#endif
+
+ fprintf (stderr, "Remote debugging using %s\n", name);
+
+ 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
{
- char *port_str;
+#ifdef USE_WIN32API
+ static int winsock_initialized;
+#endif
int port;
struct sockaddr_in sockaddr;
- int tmp;
+ socklen_t tmp;
+ char *port_end;
- port_str = strchr (name, ':');
+ port = strtoul (port_str + 1, &port_end, 10);
+ if (port_str[1] == '\0' || *port_end != '\0')
+ fatal ("Bad port argument: %s", name);
- port = atoi (port_str + 1);
+#ifdef USE_WIN32API
+ if (!winsock_initialized)
+ {
+ WSADATA wsad;
- remote_desc = socket (PF_INET, SOCK_STREAM, 0);
- if (remote_desc < 0)
+ WSAStartup (MAKEWORD (1, 0), &wsad);
+ winsock_initialized = 1;
+ }
+#endif
+
+ 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 (remote_desc, SOL_SOCKET, SO_REUSEADDR, (char *)&tmp,
- sizeof(tmp));
-
- /* Enable TCP keep alive process. */
- tmp = 1;
- setsockopt (remote_desc, SOL_SOCKET, SO_KEEPALIVE, (char *)&tmp, sizeof(tmp));
+ setsockopt (listen_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 (remote_desc, &sockaddr, sizeof (sockaddr))
- || listen (remote_desc, 1))
+ if (bind (listen_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr))
+ || listen (listen_desc, 1))
perror_with_name ("Can't bind address");
- tmp = sizeof (sockaddr);
- remote_desc = accept (remote_desc, &sockaddr, &tmp);
- if (remote_desc == -1)
- perror_with_name ("Accept failed");
+ /* 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 (listen_desc, (struct sockaddr *) &sockaddr, &len) < 0
+ || len < sizeof (sockaddr))
+ perror_with_name ("Can't determine port");
+ port = ntohs (sockaddr.sin_port);
+ }
- tmp = 1;
- setsockopt (remote_desc, 6, TCP_NODELAY, (char *)&tmp, sizeof(tmp));
+ fprintf (stderr, "Listening on port %d\n", port);
+ fflush (stderr);
+
+ /* Register the event loop handler. */
+ add_file_handler (listen_desc, handle_accept_event, NULL);
+
+ transport_is_reliable = 1;
}
+}
+
+void
+remote_close (void)
+{
+ delete_file_handler (remote_desc);
+
+#ifdef USE_WIN32API
+ closesocket (remote_desc);
+#else
+ close (remote_desc);
+#endif
+ remote_desc = INVALID_DESCRIPTOR;
- fprintf (stderr, "Remote debugging using %s\n", name);
- remote_debugging = 1;
+ reset_readchar ();
}
/* 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;
}
+#endif
+
+static const char hexchars[] = "0123456789abcdef";
+
+static int
+ishex (int ch, int *val)
+{
+ if ((ch >= 'a') && (ch <= 'f'))
+ {
+ *val = ch - 'a' + 10;
+ return 1;
+ }
+ if ((ch >= 'A') && (ch <= 'F'))
+ {
+ *val = ch - 'A' + 10;
+ return 1;
+ }
+ if ((ch >= '0') && (ch <= '9'))
+ {
+ *val = ch - '0';
+ return 1;
+ }
+ return 0;
+}
+
+#ifndef IN_PROCESS_AGENT
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+#endif
+
/* 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;
}
-/* Send the command in BUF to the remote machine,
- and read the reply into BUF.
- Report an error if we get an error reply. */
+#ifndef IN_PROCESS_AGENT
-void
-remote_send (buf)
- char *buf;
+int
+hexify (char *hex, const char *bin, int count)
{
- putpkt (buf);
- getpkt (buf);
+ 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;
+}
+
+/* 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;
+}
+
+#endif
+
+char *
+unpack_varlen_hex (char *buff, /* packet to parse */
+ ULONGEST *result)
+{
+ int nibble;
+ ULONGEST retval = 0;
+
+ while (ishex (*buff, &nibble))
+ {
+ buff++;
+ retval = retval << 4;
+ retval |= nibble & 0x0f;
+ }
+ *result = retval;
+ return buff;
+}
+
+#ifndef IN_PROCESS_AGENT
+
+/* Write a PTID to BUF. Returns BUF+CHARACTERS_WRITTEN. */
+
+char *
+write_ptid (char *buf, ptid_t ptid)
+{
+ int pid, tid;
+
+ if (multi_process)
+ {
+ pid = ptid_get_pid (ptid);
+ if (pid < 0)
+ buf += sprintf (buf, "p-%x.", -pid);
+ else
+ buf += sprintf (buf, "p%x.", pid);
+ }
+ tid = ptid_get_lwp (ptid);
+ if (tid < 0)
+ buf += sprintf (buf, "-%x", -tid);
+ else
+ buf += sprintf (buf, "%x", tid);
+
+ return buf;
+}
+
+ULONGEST
+hex_or_minus_one (char *buf, char **obuf)
+{
+ ULONGEST ret;
+
+ if (strncmp (buf, "-1", 2) == 0)
+ {
+ ret = (ULONGEST) -1;
+ buf += 2;
+ }
+ else
+ buf = unpack_varlen_hex (buf, &ret);
+
+ if (obuf)
+ *obuf = buf;
+
+ return ret;
+}
+
+/* Extract a PTID from BUF. If non-null, OBUF is set to the to one
+ passed the last parsed char. Returns null_ptid on error. */
+ptid_t
+read_ptid (char *buf, char **obuf)
+{
+ char *p = buf;
+ char *pp;
+ ULONGEST pid = 0, tid = 0;
+
+ if (*p == 'p')
+ {
+ /* Multi-process ptid. */
+ pp = unpack_varlen_hex (p + 1, &pid);
+ if (*pp != '.')
+ error ("invalid remote ptid: %s\n", p);
+
+ p = pp + 1;
+
+ tid = hex_or_minus_one (p, &pp);
+
+ if (obuf)
+ *obuf = pp;
+ return ptid_build (pid, tid, 0);
+ }
+
+ /* No multi-process. Just a tid. */
+ tid = hex_or_minus_one (p, &pp);
- if (buf[0] == 'E')
- error ("Remote failure reply: E");
+ /* Since the stub is not sending a process id, then default to
+ what's in the current inferior. */
+ pid = ptid_get_pid (((struct inferior_list_entry *) current_inferior)->id);
+
+ if (obuf)
+ *obuf = pp;
+ return ptid_build (pid, tid, 0);
}
/* Send a packet to the remote machine, with error checking.
- The data of the packet is in BUF. */
+ The data of the packet is in BUF, and the length of the
+ packet is in CNT. Returns >= 0 on success, -1 otherwise. */
-void
-putpkt (buf)
- char *buf;
+static int
+putpkt_binary_1 (char *buf, int cnt, int is_notif)
{
int i;
unsigned char csum = 0;
- char buf2[2000];
- char buf3[1];
- int cnt = strlen (buf);
+ char *buf2;
char *p;
+ int cc;
+
+ buf2 = xmalloc (PBUFSIZ);
/* Copy the packet into buffer BUF2, encapsulating it
and giving it a checksum. */
p = buf2;
- *p++ = '$';
+ if (is_notif)
+ *p++ = '%';
+ else
+ *p++ = '$';
+
+ for (i = 0; i < cnt;)
+ i += try_rle (buf + i, cnt - i, &csum, &p);
- for (i = 0; i < cnt; i++)
- {
- csum += buf[i];
- *p++ = buf[i];
- }
*p++ = '#';
*p++ = tohex ((csum >> 4) & 0xf);
*p++ = tohex (csum & 0xf);
+ *p = '\0';
+
/* Send it over and over until we get a positive ack. */
do
{
- write (remote_desc, buf2, p - buf2);
- read (remote_desc, buf3, 1);
+ if (write (remote_desc, buf2, p - buf2) != p - buf2)
+ {
+ perror ("putpkt(write)");
+ free (buf2);
+ return -1;
+ }
+
+ if (noack_mode || is_notif)
+ {
+ /* Don't expect an ack then. */
+ if (remote_debug)
+ {
+ if (is_notif)
+ fprintf (stderr, "putpkt (\"%s\"); [notif]\n", buf2);
+ else
+ fprintf (stderr, "putpkt (\"%s\"); [noack mode]\n", buf2);
+ fflush (stderr);
+ }
+ break;
+ }
+
+ if (remote_debug)
+ {
+ fprintf (stderr, "putpkt (\"%s\"); [looking for ack]\n", buf2);
+ fflush (stderr);
+ }
+
+ 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 (cc == '\003' && current_inferior != NULL)
+ (*the_target->request_interrupt) ();
+ }
+ while (cc != '+');
+
+ free (buf2);
+ return 1; /* Success! */
+}
+
+int
+putpkt_binary (char *buf, int cnt)
+{
+ return putpkt_binary_1 (buf, cnt, 0);
+}
+
+/* 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));
+}
+
+int
+putpkt_notif (char *buf)
+{
+ return putpkt_binary_1 (buf, strlen (buf), 1);
+}
+
+/* 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. 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
+input_interrupt (int unused)
+{
+ fd_set readset;
+ struct timeval immediate = { 0, 0 };
+
+ /* Protect against spurious interrupts. This has been observed to
+ be a problem under NetBSD 1.4 and 1.5. */
+
+ FD_ZERO (&readset);
+ FD_SET (remote_desc, &readset);
+ if (select (remote_desc + 1, &readset, 0, 0, &immediate) > 0)
+ {
+ int cc;
+ char c = 0;
+
+ cc = read (remote_desc, &c, 1);
+
+ if (cc != 1 || c != '\003' || current_inferior == NULL)
+ {
+ fprintf (stderr, "input_interrupt, count = %d c = %d ('%c')\n",
+ cc, c, c);
+ return;
+ }
+
+ (*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. */
+
+static 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
+}
+
+#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);
}
- while (buf3[0] != '+');
+ else
+ ionotify (remote_desc, _NOTIFY_ACTION_POLL, _NOTIFY_COND_INPUT, NULL);
}
+#endif /* __QNX__ */
+
+
+/* Current state of asynchronous I/O. */
+static int async_io_enabled;
+
+/* Enable asynchronous I/O. */
+void
+enable_async_io (void)
+{
+ if (async_io_enabled)
+ return;
+
+#ifndef USE_WIN32API
+ signal (SIGIO, input_interrupt);
+#endif
+ async_io_enabled = 1;
+#ifdef __QNX__
+ nto_comctrl (1);
+#endif /* __QNX__ */
+}
+
+/* Disable asynchronous I/O. */
+void
+disable_async_io (void)
+{
+ if (!async_io_enabled)
+ return;
+
+#ifndef USE_WIN32API
+ signal (SIGIO, SIG_IGN);
+#endif
+ async_io_enabled = 0;
+#ifdef __QNX__
+ nto_comctrl (0);
+#endif /* __QNX__ */
+
+}
+
+void
+initialize_async_io (void)
+{
+ /* Make sure that async I/O starts disabled. */
+ async_io_enabled = 1;
+ disable_async_io ();
+
+ /* Make sure the signal is unblocked. */
+ 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 ()
+readchar (void)
{
- static char buf[BUFSIZ];
- static int bufcnt = 0;
- static char *bufp;
+ int ch;
- if (bufcnt-- > 0)
- return *bufp++ & 0x7f;
+ if (readchar_bufcnt == 0)
+ {
+ readchar_bufcnt = read (remote_desc, readchar_buf, sizeof (readchar_buf));
+
+ if (readchar_bufcnt <= 0)
+ {
+ if (readchar_bufcnt == 0)
+ fprintf (stderr, "readchar: Got EOF\n");
+ else
+ perror ("readchar");
- bufcnt = read (remote_desc, buf, sizeof (buf));
+ return -1;
+ }
- if (bufcnt <= 0)
+ readchar_bufp = readchar_buf;
+ }
+
+ 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)
{
- perror ("readchar");
- fatal ("read error, quitting");
+ delete_callback_event (readchar_callback);
+ readchar_callback = NOT_SCHEDULED;
}
+}
- bufp = buf;
- bufcnt--;
- return *bufp++ & 0x7f;
+/* 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,
- and store it in BUF. */
+ and store it in BUF. Returns length of packet, or negative if error. */
-void
-getpkt (buf)
- char *buf;
+int
+getpkt (char *buf)
{
char *bp;
unsigned char csum, c1, c2;
{
csum = 0;
- while ((c = readchar ()) != '$');
+ while (1)
+ {
+ c = readchar ();
+ if (c == '$')
+ break;
+ if (remote_debug)
+ {
+ fprintf (stderr, "[getpkt: discarding char '%c']\n", c);
+ fflush (stderr);
+ }
+
+ if (c < 0)
+ return -1;
+ }
bp = buf;
while (1)
{
c = readchar ();
+ if (c < 0)
+ return -1;
if (c == '#')
break;
*bp++ = c;
c1 = fromhex (readchar ());
c2 = fromhex (readchar ());
+
if (csum == (c1 << 4) + c2)
break;
+ if (noack_mode)
+ {
+ fprintf (stderr, "Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s [no-ack-mode, Bad medium?]\n",
+ (c1 << 4) + c2, csum, buf);
+ /* Not much we can do, GDB wasn't expecting an ack/nac. */
+ break;
+ }
+
fprintf (stderr, "Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n",
(c1 << 4) + c2, csum, buf);
- write (remote_desc, "-", 1);
+ if (write (remote_desc, "-", 1) != 1)
+ return -1;
}
- write (remote_desc, "+", 1);
+ if (!noack_mode)
+ {
+ if (remote_debug)
+ {
+ fprintf (stderr, "getpkt (\"%s\"); [sending ack] \n", buf);
+ fflush (stderr);
+ }
+
+ if (write (remote_desc, "+", 1) != 1)
+ return -1;
+
+ if (remote_debug)
+ {
+ fprintf (stderr, "[sent ack]\n");
+ fflush (stderr);
+ }
+ }
+ else
+ {
+ if (remote_debug)
+ {
+ fprintf (stderr, "getpkt (\"%s\"); [no ack sent] \n", buf);
+ fflush (stderr);
+ }
+ }
+
+ return bp - buf;
}
void
-write_ok (buf)
- char *buf;
+write_ok (char *buf)
{
buf[0] = 'O';
- buf[1] = 'k';
+ buf[1] = 'K';
buf[2] = '\0';
}
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';
}
+#endif
+
void
-convert_int_to_ascii (from, to, n)
- char *from, *to;
- int n;
+convert_int_to_ascii (const unsigned char *from, char *to, int n)
{
int nib;
- char ch;
+ int ch;
while (n--)
{
ch = *from++;
*to++ = 0;
}
+#ifndef IN_PROCESS_AGENT
void
-convert_ascii_to_int (from, to, n)
- char *from, *to;
- int n;
+convert_ascii_to_int (const char *from, unsigned char *to, int n)
{
int nib1, nib2;
while (n--)
}
static char *
-outreg(regno, buf)
- int regno;
- char *buf;
+outreg (struct regcache *regcache, int regno, char *buf)
{
- extern char registers[];
-
- *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, 4);
- buf += 8;
+ collect_register_as_string (regcache, regno, buf);
+ buf += 2 * register_size (regno);
*buf++ = ';';
return buf;
}
void
-prepare_resume_reply (buf, status, signal)
- char *buf, status;
- unsigned char signal;
+new_thread_notify (int id)
{
- int nib;
- char ch;
+ char own_buf[256];
- *buf++ = 'T';
+ /* The `n' response is not yet part of the remote protocol. Do nothing. */
+ if (1)
+ return;
- nib = ((signal & 0xf0) >> 4);
- *buf++ = tohex (nib);
- nib = signal & 0x0f;
- *buf++ = tohex (nib);
+ if (server_waiting == 0)
+ return;
- 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
+ sprintf (own_buf, "n%x", id);
+ disable_async_io ();
+ putpkt (own_buf);
+ enable_async_io ();
+}
- *buf++ = 0;
+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, ptid_t ptid,
+ struct target_waitstatus *status)
+{
+ if (debug_threads)
+ fprintf (stderr, "Writing resume reply for %s:%d\n\n",
+ target_pid_to_str (ptid), status->kind);
+
+ switch (status->kind)
+ {
+ case TARGET_WAITKIND_STOPPED:
+ {
+ struct thread_info *saved_inferior;
+ const char **regp;
+ struct regcache *regcache;
+
+ sprintf (buf, "T%02x", status->value.sig);
+ buf += strlen (buf);
+
+ regp = gdbserver_expedite_regs;
+
+ saved_inferior = current_inferior;
+
+ 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) ())
+ {
+ CORE_ADDR addr;
+ int i;
+
+ strncpy (buf, "watch:", 6);
+ buf += 6;
+
+ addr = (*the_target->stopped_data_address) ();
+
+ /* Convert each byte of the address into two hexadecimal
+ chars. Note that we take sizeof (void *) instead of
+ sizeof (addr); this is to avoid sending a 64-bit
+ address to a 32-bit GDB. */
+ for (i = sizeof (void *) * 2; i > 0; i--)
+ *buf++ = tohex ((addr >> (i - 1) * 4) & 0xf);
+ *buf++ = ';';
+ }
+
+ while (*regp)
+ {
+ 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
+ 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 && !disable_packet_Tthread)
+ {
+ /* 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 || !ptid_equal (general_thread, ptid))
+ {
+ int core = -1;
+ /* In non-stop, don't change the general thread behind
+ GDB's back. */
+ if (!non_stop)
+ general_thread = ptid;
+ sprintf (buf, "thread:");
+ buf += strlen (buf);
+ 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);
+ }
+ }
+ }
+
+ if (dlls_changed)
+ {
+ strcpy (buf, "library:;");
+ buf += strlen (buf);
+ dlls_changed = 0;
+ }
+
+ current_inferior = saved_inferior;
+ }
+ break;
+ case TARGET_WAITKIND_EXITED:
+ if (multi_process)
+ sprintf (buf, "W%x;process:%x",
+ status->value.integer, ptid_get_pid (ptid));
+ else
+ sprintf (buf, "W%02x", status->value.integer);
+ break;
+ case TARGET_WAITKIND_SIGNALLED:
+ if (multi_process)
+ sprintf (buf, "X%x;process:%x",
+ status->value.sig, ptid_get_pid (ptid));
+ else
+ sprintf (buf, "X%02x", status->value.sig);
+ break;
+ default:
+ error ("unhandled waitkind");
+ break;
+ }
}
void
-decode_m_packet (from, mem_addr_ptr, len_ptr)
- char *from;
- unsigned int *mem_addr_ptr, *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;
- unsigned int *mem_addr_ptr, *len_ptr;
+decode_M_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr,
+ unsigned char **to_p)
{
- int i = 0, j = 0;
+ 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 (*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_p)
+{
+ int i = 0;
char ch;
*mem_addr_ptr = *len_ptr = 0;
*len_ptr |= fromhex (ch) & 0x0f;
}
- convert_ascii_to_int (&from[i++], to, *len_ptr);
+ if (*to_p == NULL)
+ *to_p = xmalloc (*len_ptr);
+
+ if (remote_unescape_input ((const gdb_byte *) &from[i], packet_len - i,
+ *to_p, *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;
+}
+
+/* Decode the parameters of a qSearch:memory packet. */
+
+int
+decode_search_memory_packet (const char *buf, int packet_len,
+ CORE_ADDR *start_addrp,
+ CORE_ADDR *search_space_lenp,
+ gdb_byte *pattern, unsigned int *pattern_lenp)
+{
+ const char *p = buf;
+
+ p = decode_address_to_semicolon (start_addrp, p);
+ p = decode_address_to_semicolon (search_space_lenp, p);
+ packet_len -= p - buf;
+ *pattern_lenp = remote_unescape_input ((const gdb_byte *) p, packet_len,
+ pattern, packet_len);
+ return 0;
+}
+
+static void
+free_sym_cache (struct sym_cache *sym)
+{
+ if (sym != NULL)
+ {
+ free (sym->name);
+ free (sym);
+ }
+}
+
+void
+clear_symbol_cache (struct sym_cache **symcache_p)
+{
+ struct sym_cache *sym, *next;
+
+ /* Check the cache first. */
+ for (sym = *symcache_p; sym; sym = next)
+ {
+ next = sym->next;
+ free_sym_cache (sym);
+ }
+
+ *symcache_p = NULL;
+}
+
+/* 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, int may_ask_gdb)
+{
+ char own_buf[266], *p, *q;
+ int len;
+ struct sym_cache *sym;
+ struct process_info *proc;
+
+ proc = current_process ();
+
+ /* Check the cache first. */
+ for (sym = proc->symbol_cache; sym; sym = sym->next)
+ if (strcmp (name, sym->name) == 0)
+ {
+ *addrp = sym->addr;
+ return 1;
+ }
+
+ /* 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. */
+ 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;
+
+ /* 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 = 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);
+ 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)
+ {
+ warning ("Malformed response to qSymbol, ignoring: %s\n", own_buf);
+ 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 = xmalloc (sizeof (*sym));
+ sym->name = xstrdup (name);
+ sym->addr = *addrp;
+ sym->next = proc->symbol_cache;
+ proc->symbol_cache = sym;
+
+ 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)
+{
+ char *buf = xmalloc (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 = xmalloc (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;
+}
+
+void
+buffer_grow (struct buffer *buffer, const char *data, size_t size)
+{
+ char *new_buffer;
+ size_t new_buffer_size;
+
+ if (size == 0)
+ return;
+
+ new_buffer_size = buffer->buffer_size;
+
+ if (new_buffer_size == 0)
+ new_buffer_size = 1;
+
+ while (buffer->used_size + size > new_buffer_size)
+ new_buffer_size *= 2;
+ new_buffer = realloc (buffer->buffer, new_buffer_size);
+ if (!new_buffer)
+ abort ();
+ memcpy (new_buffer + buffer->used_size, data, size);
+ buffer->buffer = new_buffer;
+ buffer->buffer_size = new_buffer_size;
+ buffer->used_size += size;
+}
+
+void
+buffer_free (struct buffer *buffer)
+{
+ if (!buffer)
+ return;
+
+ free (buffer->buffer);
+ buffer->buffer = NULL;
+ buffer->buffer_size = 0;
+ buffer->used_size = 0;
+}
+
+void
+buffer_init (struct buffer *buffer)
+{
+ memset (buffer, 0, sizeof (*buffer));
+}
+
+char*
+buffer_finish (struct buffer *buffer)
+{
+ char *ret = buffer->buffer;
+ buffer->buffer = NULL;
+ buffer->buffer_size = 0;
+ buffer->used_size = 0;
+ return ret;
+}
+
+void
+buffer_xml_printf (struct buffer *buffer, const char *format, ...)
+{
+ va_list ap;
+ const char *f;
+ const char *prev;
+ int percent = 0;
+
+ va_start (ap, format);
+
+ prev = format;
+ for (f = format; *f; f++)
+ {
+ if (percent)
+ {
+ switch (*f)
+ {
+ case 's':
+ {
+ char *p;
+ char *a = va_arg (ap, char *);
+ buffer_grow (buffer, prev, f - prev - 1);
+ p = xml_escape_text (a);
+ buffer_grow_str (buffer, p);
+ free (p);
+ 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;
+ }
+ else if (*f == '%')
+ percent = 1;
+ }
+
+ buffer_grow_str (buffer, prev);
+ va_end (ap);
+}
+
+#endif
projects / deliverable / binutils-gdb.git / blobdiff