mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-15 04:31:49 +08:00
e581f2b4a7
(gdbchar): New. (expect): Use gdbchar. Check for error reading from GDB. Clarify sync error output. (play): Check for errors writing to GDB. * linux-low.c (sigchld_handler): Really ignore `write' errors. * remote-utils.c (getpkt): Check for errors writing to the remote descriptor.
1865 lines
40 KiB
C
1865 lines
40 KiB
C
/* Remote utility routines for the remote server for GDB.
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Copyright (C) 1986, 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
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2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
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Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "server.h"
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#include "terminal.h"
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#include "target.h"
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#include <stdio.h>
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#include <string.h>
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#if HAVE_SYS_IOCTL_H
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#include <sys/ioctl.h>
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#endif
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#if HAVE_SYS_FILE_H
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#include <sys/file.h>
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#endif
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#if HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#if HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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#if HAVE_NETDB_H
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#include <netdb.h>
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#endif
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#if HAVE_NETINET_TCP_H
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#include <netinet/tcp.h>
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#endif
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#if HAVE_SYS_IOCTL_H
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#include <sys/ioctl.h>
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#endif
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#if HAVE_SIGNAL_H
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#include <signal.h>
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#endif
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#if HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#include <sys/time.h>
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#if HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#endif
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#include <sys/stat.h>
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#if HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#if USE_WIN32API
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#include <winsock2.h>
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#endif
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#if __QNX__
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#include <sys/iomgr.h>
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#endif /* __QNX__ */
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#ifndef HAVE_SOCKLEN_T
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typedef int socklen_t;
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#endif
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#ifndef IN_PROCESS_AGENT
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#if USE_WIN32API
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# define INVALID_DESCRIPTOR INVALID_SOCKET
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#else
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# define INVALID_DESCRIPTOR -1
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#endif
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/* Extra value for readchar_callback. */
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enum {
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/* The callback is currently not scheduled. */
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NOT_SCHEDULED = -1
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};
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/* Status of the readchar callback.
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Either NOT_SCHEDULED or the callback id. */
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static int readchar_callback = NOT_SCHEDULED;
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static int readchar (void);
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static void reset_readchar (void);
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static void reschedule (void);
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/* A cache entry for a successfully looked-up symbol. */
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struct sym_cache
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{
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char *name;
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CORE_ADDR addr;
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struct sym_cache *next;
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};
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int remote_debug = 0;
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struct ui_file *gdb_stdlog;
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static int remote_desc = INVALID_DESCRIPTOR;
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static int listen_desc = INVALID_DESCRIPTOR;
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/* FIXME headerize? */
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extern int using_threads;
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extern int debug_threads;
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/* If true, then GDB has requested noack mode. */
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int noack_mode = 0;
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/* If true, then we tell GDB to use noack mode by default. */
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int transport_is_reliable = 0;
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#ifdef USE_WIN32API
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# define read(fd, buf, len) recv (fd, (char *) buf, len, 0)
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# define write(fd, buf, len) send (fd, (char *) buf, len, 0)
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#endif
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int
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gdb_connected (void)
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{
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return remote_desc != INVALID_DESCRIPTOR;
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}
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static void
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enable_async_notification (int fd)
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{
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#if defined(F_SETFL) && defined (FASYNC)
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int save_fcntl_flags;
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save_fcntl_flags = fcntl (fd, F_GETFL, 0);
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fcntl (fd, F_SETFL, save_fcntl_flags | FASYNC);
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#if defined (F_SETOWN)
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fcntl (fd, F_SETOWN, getpid ());
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#endif
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#endif
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}
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static int
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handle_accept_event (int err, gdb_client_data client_data)
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{
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struct sockaddr_in sockaddr;
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socklen_t tmp;
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if (debug_threads)
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fprintf (stderr, "handling possible accept event\n");
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tmp = sizeof (sockaddr);
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remote_desc = accept (listen_desc, (struct sockaddr *) &sockaddr, &tmp);
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if (remote_desc == -1)
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perror_with_name ("Accept failed");
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/* Enable TCP keep alive process. */
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tmp = 1;
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setsockopt (remote_desc, SOL_SOCKET, SO_KEEPALIVE,
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(char *) &tmp, sizeof (tmp));
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/* Tell TCP not to delay small packets. This greatly speeds up
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interactive response. */
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tmp = 1;
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setsockopt (remote_desc, IPPROTO_TCP, TCP_NODELAY,
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(char *) &tmp, sizeof (tmp));
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#ifndef USE_WIN32API
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close (listen_desc); /* No longer need this */
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signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbserver simply
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exits when the remote side dies. */
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#else
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closesocket (listen_desc); /* No longer need this */
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#endif
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delete_file_handler (listen_desc);
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/* Convert IP address to string. */
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fprintf (stderr, "Remote debugging from host %s\n",
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inet_ntoa (sockaddr.sin_addr));
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enable_async_notification (remote_desc);
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/* Register the event loop handler. */
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add_file_handler (remote_desc, handle_serial_event, NULL);
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/* We have a new GDB connection now. If we were disconnected
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tracing, there's a window where the target could report a stop
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event to the event loop, and since we have a connection now, we'd
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try to send vStopped notifications to GDB. But, don't do that
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until GDB as selected all-stop/non-stop, and has queried the
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threads' status ('?'). */
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target_async (0);
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return 0;
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}
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/* Open a connection to a remote debugger.
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NAME is the filename used for communication. */
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void
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remote_open (char *name)
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{
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char *port_str;
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port_str = strchr (name, ':');
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if (port_str == NULL)
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{
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#ifdef USE_WIN32API
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error ("Only <host>:<port> is supported on this platform.");
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#else
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struct stat statbuf;
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if (stat (name, &statbuf) == 0
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&& (S_ISCHR (statbuf.st_mode) || S_ISFIFO (statbuf.st_mode)))
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remote_desc = open (name, O_RDWR);
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else
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{
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errno = EINVAL;
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remote_desc = -1;
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}
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if (remote_desc < 0)
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perror_with_name ("Could not open remote device");
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#ifdef HAVE_TERMIOS
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{
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struct termios termios;
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tcgetattr (remote_desc, &termios);
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termios.c_iflag = 0;
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termios.c_oflag = 0;
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termios.c_lflag = 0;
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termios.c_cflag &= ~(CSIZE | PARENB);
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termios.c_cflag |= CLOCAL | CS8;
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termios.c_cc[VMIN] = 1;
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termios.c_cc[VTIME] = 0;
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tcsetattr (remote_desc, TCSANOW, &termios);
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}
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#endif
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#ifdef HAVE_TERMIO
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{
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struct termio termio;
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ioctl (remote_desc, TCGETA, &termio);
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termio.c_iflag = 0;
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termio.c_oflag = 0;
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termio.c_lflag = 0;
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termio.c_cflag &= ~(CSIZE | PARENB);
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termio.c_cflag |= CLOCAL | CS8;
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termio.c_cc[VMIN] = 1;
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termio.c_cc[VTIME] = 0;
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ioctl (remote_desc, TCSETA, &termio);
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}
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#endif
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#ifdef HAVE_SGTTY
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{
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struct sgttyb sg;
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ioctl (remote_desc, TIOCGETP, &sg);
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sg.sg_flags = RAW;
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ioctl (remote_desc, TIOCSETP, &sg);
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}
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#endif
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fprintf (stderr, "Remote debugging using %s\n", name);
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transport_is_reliable = 0;
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enable_async_notification (remote_desc);
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/* Register the event loop handler. */
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add_file_handler (remote_desc, handle_serial_event, NULL);
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#endif /* USE_WIN32API */
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}
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else
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{
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#ifdef USE_WIN32API
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static int winsock_initialized;
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#endif
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int port;
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struct sockaddr_in sockaddr;
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socklen_t tmp;
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char *port_end;
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port = strtoul (port_str + 1, &port_end, 10);
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if (port_str[1] == '\0' || *port_end != '\0')
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fatal ("Bad port argument: %s", name);
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#ifdef USE_WIN32API
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if (!winsock_initialized)
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{
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WSADATA wsad;
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WSAStartup (MAKEWORD (1, 0), &wsad);
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winsock_initialized = 1;
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}
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#endif
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listen_desc = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
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if (listen_desc == -1)
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perror_with_name ("Can't open socket");
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/* Allow rapid reuse of this port. */
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tmp = 1;
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setsockopt (listen_desc, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp,
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sizeof (tmp));
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sockaddr.sin_family = PF_INET;
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sockaddr.sin_port = htons (port);
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sockaddr.sin_addr.s_addr = INADDR_ANY;
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if (bind (listen_desc, (struct sockaddr *) &sockaddr, sizeof (sockaddr))
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|| listen (listen_desc, 1))
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perror_with_name ("Can't bind address");
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/* If port is zero, a random port will be selected, and the
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fprintf below needs to know what port was selected. */
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if (port == 0)
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{
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socklen_t len = sizeof (sockaddr);
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if (getsockname (listen_desc, (struct sockaddr *) &sockaddr, &len) < 0
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|| len < sizeof (sockaddr))
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perror_with_name ("Can't determine port");
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port = ntohs (sockaddr.sin_port);
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}
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fprintf (stderr, "Listening on port %d\n", port);
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fflush (stderr);
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/* Register the event loop handler. */
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add_file_handler (listen_desc, handle_accept_event, NULL);
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transport_is_reliable = 1;
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}
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}
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void
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remote_close (void)
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{
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delete_file_handler (remote_desc);
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#ifdef USE_WIN32API
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closesocket (remote_desc);
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#else
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close (remote_desc);
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#endif
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remote_desc = INVALID_DESCRIPTOR;
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reset_readchar ();
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}
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/* Convert hex digit A to a number. */
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static int
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fromhex (int a)
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{
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if (a >= '0' && a <= '9')
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return a - '0';
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else if (a >= 'a' && a <= 'f')
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return a - 'a' + 10;
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else
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error ("Reply contains invalid hex digit");
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return 0;
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}
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#endif
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static const char hexchars[] = "0123456789abcdef";
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static int
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ishex (int ch, int *val)
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{
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if ((ch >= 'a') && (ch <= 'f'))
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{
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*val = ch - 'a' + 10;
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return 1;
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}
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if ((ch >= 'A') && (ch <= 'F'))
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{
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*val = ch - 'A' + 10;
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return 1;
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}
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if ((ch >= '0') && (ch <= '9'))
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{
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*val = ch - '0';
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return 1;
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}
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return 0;
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}
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#ifndef IN_PROCESS_AGENT
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int
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unhexify (char *bin, const char *hex, int count)
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{
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int i;
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for (i = 0; i < count; i++)
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{
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if (hex[0] == 0 || hex[1] == 0)
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{
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/* Hex string is short, or of uneven length.
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Return the count that has been converted so far. */
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return i;
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}
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*bin++ = fromhex (hex[0]) * 16 + fromhex (hex[1]);
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hex += 2;
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}
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return i;
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}
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void
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decode_address (CORE_ADDR *addrp, const char *start, int len)
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{
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CORE_ADDR addr;
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char ch;
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int i;
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addr = 0;
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for (i = 0; i < len; i++)
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{
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ch = start[i];
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addr = addr << 4;
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addr = addr | (fromhex (ch) & 0x0f);
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}
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*addrp = addr;
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}
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const char *
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decode_address_to_semicolon (CORE_ADDR *addrp, const char *start)
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{
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const char *end;
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end = start;
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while (*end != '\0' && *end != ';')
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end++;
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decode_address (addrp, start, end - start);
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if (*end == ';')
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end++;
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return end;
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}
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#endif
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/* Convert number NIB to a hex digit. */
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static int
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tohex (int nib)
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{
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if (nib < 10)
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return '0' + nib;
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else
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return 'a' + nib - 10;
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}
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#ifndef IN_PROCESS_AGENT
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int
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hexify (char *hex, const char *bin, int count)
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{
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int i;
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|
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/* May use a length, or a nul-terminated string as input. */
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if (count == 0)
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count = strlen (bin);
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for (i = 0; i < count; i++)
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{
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*hex++ = tohex ((*bin >> 4) & 0xf);
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*hex++ = tohex (*bin++ & 0xf);
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}
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*hex = 0;
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return i;
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}
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|
/* 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
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|
(which may be more than *OUT_LEN due to escape characters). The
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total number of bytes in the output buffer will be at most
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OUT_MAXLEN. */
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int
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remote_escape_output (const gdb_byte *buffer, int len,
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gdb_byte *out_buf, int *out_len,
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int out_maxlen)
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|
{
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|
int input_index, output_index;
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output_index = 0;
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for (input_index = 0; input_index < len; input_index++)
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{
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gdb_byte b = buffer[input_index];
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if (b == '$' || b == '#' || b == '}' || b == '*')
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{
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/* These must be escaped. */
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|
if (output_index + 2 > out_maxlen)
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break;
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out_buf[output_index++] = '}';
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out_buf[output_index++] = b ^ 0x20;
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|
}
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|
else
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|
{
|
|
if (output_index + 1 > out_maxlen)
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|
break;
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out_buf[output_index++] = b;
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|
}
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|
}
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|
|
*out_len = input_index;
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|
return output_index;
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|
}
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|
/* Convert BUFFER, escaped data LEN bytes long, into binary data
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|
in OUT_BUF. Return the number of bytes written to OUT_BUF.
|
|
Raise an error if the total number of bytes exceeds OUT_MAXLEN.
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|
This function reverses remote_escape_output. It allows more
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|
escaped characters than that function does, in particular because
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|
'*' must be escaped to avoid the run-length encoding processing
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|
in reading packets. */
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|
|
static int
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remote_unescape_input (const gdb_byte *buffer, int len,
|
|
gdb_byte *out_buf, int out_maxlen)
|
|
{
|
|
int input_index, output_index;
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|
int escaped;
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|
output_index = 0;
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escaped = 0;
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for (input_index = 0; input_index < len; input_index++)
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|
{
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|
gdb_byte b = buffer[input_index];
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|
|
if (output_index + 1 > out_maxlen)
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error ("Received too much data from the target.");
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|
|
if (escaped)
|
|
{
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|
out_buf[output_index++] = b ^ 0x20;
|
|
escaped = 0;
|
|
}
|
|
else if (b == '}')
|
|
escaped = 1;
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|
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);
|
|
|
|
/* 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, and the length of the
|
|
packet is in CNT. Returns >= 0 on success, -1 otherwise. */
|
|
|
|
static int
|
|
putpkt_binary_1 (char *buf, int cnt, int is_notif)
|
|
{
|
|
int i;
|
|
unsigned char csum = 0;
|
|
char *buf2;
|
|
char *p;
|
|
int cc;
|
|
|
|
buf2 = xmalloc (PBUFSIZ);
|
|
|
|
/* Copy the packet into buffer BUF2, encapsulating it
|
|
and giving it a checksum. */
|
|
|
|
p = buf2;
|
|
if (is_notif)
|
|
*p++ = '%';
|
|
else
|
|
*p++ = '$';
|
|
|
|
for (i = 0; i < cnt;)
|
|
i += try_rle (buf + i, cnt - i, &csum, &p);
|
|
|
|
*p++ = '#';
|
|
*p++ = tohex ((csum >> 4) & 0xf);
|
|
*p++ = tohex (csum & 0xf);
|
|
|
|
*p = '\0';
|
|
|
|
/* Send it over and over until we get a positive ack. */
|
|
|
|
do
|
|
{
|
|
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);
|
|
}
|
|
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 (void)
|
|
{
|
|
int ch;
|
|
|
|
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");
|
|
|
|
return -1;
|
|
}
|
|
|
|
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)
|
|
{
|
|
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,
|
|
and store it in BUF. Returns length of packet, or negative if error. */
|
|
|
|
int
|
|
getpkt (char *buf)
|
|
{
|
|
char *bp;
|
|
unsigned char csum, c1, c2;
|
|
int c;
|
|
|
|
while (1)
|
|
{
|
|
csum = 0;
|
|
|
|
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;
|
|
csum += c;
|
|
}
|
|
*bp = 0;
|
|
|
|
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);
|
|
if (write (remote_desc, "-", 1) != 1)
|
|
return -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 (char *buf)
|
|
{
|
|
buf[0] = 'O';
|
|
buf[1] = 'K';
|
|
buf[2] = '\0';
|
|
}
|
|
|
|
void
|
|
write_enn (char *buf)
|
|
{
|
|
/* Some day, we should define the meanings of the error codes... */
|
|
buf[0] = 'E';
|
|
buf[1] = '0';
|
|
buf[2] = '1';
|
|
buf[3] = '\0';
|
|
}
|
|
|
|
#endif
|
|
|
|
void
|
|
convert_int_to_ascii (const unsigned char *from, char *to, int n)
|
|
{
|
|
int nib;
|
|
int ch;
|
|
while (n--)
|
|
{
|
|
ch = *from++;
|
|
nib = ((ch & 0xf0) >> 4) & 0x0f;
|
|
*to++ = tohex (nib);
|
|
nib = ch & 0x0f;
|
|
*to++ = tohex (nib);
|
|
}
|
|
*to++ = 0;
|
|
}
|
|
|
|
#ifndef IN_PROCESS_AGENT
|
|
|
|
void
|
|
convert_ascii_to_int (const char *from, unsigned char *to, int n)
|
|
{
|
|
int nib1, nib2;
|
|
while (n--)
|
|
{
|
|
nib1 = fromhex (*from++);
|
|
nib2 = fromhex (*from++);
|
|
*to++ = (((nib1 & 0x0f) << 4) & 0xf0) | (nib2 & 0x0f);
|
|
}
|
|
}
|
|
|
|
static char *
|
|
outreg (struct regcache *regcache, int regno, char *buf)
|
|
{
|
|
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++ = ':';
|
|
collect_register_as_string (regcache, regno, buf);
|
|
buf += 2 * register_size (regno);
|
|
*buf++ = ';';
|
|
|
|
return buf;
|
|
}
|
|
|
|
void
|
|
new_thread_notify (int id)
|
|
{
|
|
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, 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 (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr)
|
|
{
|
|
int i = 0, j = 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;
|
|
}
|
|
|
|
for (j = 0; j < 4; j++)
|
|
{
|
|
if ((ch = from[i++]) == 0)
|
|
break;
|
|
*len_ptr = *len_ptr << 4;
|
|
*len_ptr |= fromhex (ch) & 0x0f;
|
|
}
|
|
}
|
|
|
|
void
|
|
decode_M_packet (char *from, CORE_ADDR *mem_addr_ptr, unsigned int *len_ptr,
|
|
unsigned char **to_p)
|
|
{
|
|
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;
|
|
|
|
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);
|
|
|
|
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
|