1629 lines
38 KiB
C++
1629 lines
38 KiB
C++
/* Remote utility routines for the remote server for GDB.
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Copyright (C) 1986-2022 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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#if HAVE_TERMIOS_H
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#include <termios.h>
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#endif
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#include "target.h"
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#include "gdbthread.h"
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#include "tdesc.h"
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#include "debug.h"
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#include "dll.h"
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#include "gdbsupport/rsp-low.h"
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#include "gdbsupport/netstuff.h"
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#include "gdbsupport/filestuff.h"
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#include "gdbsupport/gdb-sigmask.h"
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#include <ctype.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 "gdbsupport/gdb_sys_time.h"
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#include <unistd.h>
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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 USE_WIN32API
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#include <ws2tcpip.h>
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#endif
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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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/* 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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static int remote_is_stdio = 0;
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static int remote_desc = -1;
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static int listen_desc = -1;
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#ifdef USE_WIN32API
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/* gnulib wraps these as macros, undo them. */
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# undef read
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# undef write
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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 != -1;
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}
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/* Return true if the remote connection is over stdio. */
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int
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remote_connection_is_stdio (void)
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{
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return remote_is_stdio;
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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 void
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handle_accept_event (int err, gdb_client_data client_data)
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{
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struct sockaddr_storage sockaddr;
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socklen_t len = sizeof (sockaddr);
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threads_debug_printf ("handling possible accept event");
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remote_desc = accept (listen_desc, (struct sockaddr *) &sockaddr, &len);
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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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socklen_t 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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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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#endif
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if (run_once)
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{
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#ifndef USE_WIN32API
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close (listen_desc); /* No longer need this */
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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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}
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/* Even if !RUN_ONCE no longer notice new connections. Still keep the
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descriptor open for add_file_handler to wait for a new connection. */
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delete_file_handler (listen_desc);
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/* Convert IP address to string. */
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char orig_host[GDB_NI_MAX_ADDR], orig_port[GDB_NI_MAX_PORT];
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int r = getnameinfo ((struct sockaddr *) &sockaddr, len,
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orig_host, sizeof (orig_host),
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orig_port, sizeof (orig_port),
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NI_NUMERICHOST | NI_NUMERICSERV);
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if (r != 0)
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fprintf (stderr, _("Could not obtain remote address: %s\n"),
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gai_strerror (r));
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else
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fprintf (stderr, _("Remote debugging from host %s, port %s\n"),
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orig_host, orig_port);
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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, "remote-net");
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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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}
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/* Prepare for a later 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_prepare (const char *name)
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{
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client_state &cs = get_client_state ();
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#ifdef USE_WIN32API
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static int winsock_initialized;
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#endif
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socklen_t tmp;
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remote_is_stdio = 0;
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if (strcmp (name, STDIO_CONNECTION_NAME) == 0)
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{
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/* We need to record fact that we're using stdio sooner than the
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call to remote_open so start_inferior knows the connection is
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via stdio. */
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remote_is_stdio = 1;
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cs.transport_is_reliable = 1;
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return;
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}
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struct addrinfo hint;
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struct addrinfo *ainfo;
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memset (&hint, 0, sizeof (hint));
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/* Assume no prefix will be passed, therefore we should use
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AF_UNSPEC. */
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hint.ai_family = AF_UNSPEC;
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hint.ai_socktype = SOCK_STREAM;
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hint.ai_protocol = IPPROTO_TCP;
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parsed_connection_spec parsed
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= parse_connection_spec_without_prefix (name, &hint);
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if (parsed.port_str.empty ())
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{
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cs.transport_is_reliable = 0;
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return;
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}
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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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int r = getaddrinfo (parsed.host_str.c_str (), parsed.port_str.c_str (),
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&hint, &ainfo);
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if (r != 0)
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error (_("%s: cannot resolve name: %s"), name, gai_strerror (r));
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scoped_free_addrinfo freeaddrinfo (ainfo);
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struct addrinfo *iter;
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for (iter = ainfo; iter != NULL; iter = iter->ai_next)
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{
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listen_desc = gdb_socket_cloexec (iter->ai_family, iter->ai_socktype,
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iter->ai_protocol);
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if (listen_desc >= 0)
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break;
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}
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if (iter == NULL)
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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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switch (iter->ai_family)
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{
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case AF_INET:
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((struct sockaddr_in *) iter->ai_addr)->sin_addr.s_addr = INADDR_ANY;
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break;
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case AF_INET6:
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((struct sockaddr_in6 *) iter->ai_addr)->sin6_addr = in6addr_any;
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break;
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default:
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internal_error (__FILE__, __LINE__,
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_("Invalid 'ai_family' %d\n"), iter->ai_family);
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}
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if (bind (listen_desc, iter->ai_addr, iter->ai_addrlen) != 0)
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perror_with_name ("Can't bind address");
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if (listen (listen_desc, 1) != 0)
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perror_with_name ("Can't listen on socket");
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cs.transport_is_reliable = 1;
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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 (const char *name)
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{
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const char *port_str;
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port_str = strchr (name, ':');
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#ifdef USE_WIN32API
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if (port_str == NULL)
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error ("Only HOST:PORT is supported on this platform.");
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#endif
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if (strcmp (name, STDIO_CONNECTION_NAME) == 0)
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{
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fprintf (stderr, "Remote debugging using stdio\n");
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/* Use stdin as the handle of the connection.
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We only select on reads, for example. */
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remote_desc = fileno (stdin);
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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, "remote-stdio");
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}
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#ifndef USE_WIN32API
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else if (port_str == NULL)
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{
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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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#if HAVE_TERMIOS_H
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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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fprintf (stderr, "Remote debugging using %s\n", name);
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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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"remote-device");
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}
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#endif /* USE_WIN32API */
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else
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{
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char listen_port[GDB_NI_MAX_PORT];
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struct sockaddr_storage sockaddr;
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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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perror_with_name ("Can't determine port");
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int r = getnameinfo ((struct sockaddr *) &sockaddr, len,
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NULL, 0,
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listen_port, sizeof (listen_port),
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NI_NUMERICSERV);
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if (r != 0)
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fprintf (stderr, _("Can't obtain port where we are listening: %s"),
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gai_strerror (r));
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else
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fprintf (stderr, _("Listening on port %s\n"), listen_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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"remote-listen");
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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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disable_async_io ();
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#ifdef USE_WIN32API
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closesocket (remote_desc);
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#else
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if (! remote_connection_is_stdio ())
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close (remote_desc);
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#endif
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remote_desc = -1;
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reset_readchar ();
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}
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#endif
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#ifndef IN_PROCESS_AGENT
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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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#ifndef IN_PROCESS_AGENT
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/* Look for a sequence of characters which can be run-length encoded.
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If there are any, update *CSUM and *P. Otherwise, output the
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single character. Return the number of characters consumed. */
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static int
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try_rle (char *buf, int remaining, unsigned char *csum, char **p)
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{
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int n;
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/* Always output the character. */
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*csum += buf[0];
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*(*p)++ = buf[0];
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/* Don't go past '~'. */
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if (remaining > 97)
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remaining = 97;
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for (n = 1; n < remaining; n++)
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if (buf[n] != buf[0])
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break;
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/* N is the index of the first character not the same as buf[0].
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buf[0] is counted twice, so by decrementing N, we get the number
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of characters the RLE sequence will replace. */
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n--;
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if (n < 3)
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return 1;
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/* Skip the frame characters. The manual says to skip '+' and '-'
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also, but there's no reason to. Unfortunately these two unusable
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characters double the encoded length of a four byte zero
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value. */
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while (n + 29 == '$' || n + 29 == '#')
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n--;
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*csum += '*';
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*(*p)++ = '*';
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*csum += n + 29;
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*(*p)++ = n + 29;
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return n + 1;
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}
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#endif
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#ifndef IN_PROCESS_AGENT
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/* Write a PTID to BUF. Returns BUF+CHARACTERS_WRITTEN. */
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char *
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write_ptid (char *buf, ptid_t ptid)
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{
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client_state &cs = get_client_state ();
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int pid, tid;
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if (cs.multi_process)
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{
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pid = ptid.pid ();
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if (pid < 0)
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buf += sprintf (buf, "p-%x.", -pid);
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else
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buf += sprintf (buf, "p%x.", pid);
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}
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tid = ptid.lwp ();
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if (tid < 0)
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buf += sprintf (buf, "-%x", -tid);
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else
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buf += sprintf (buf, "%x", tid);
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return buf;
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}
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|
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static ULONGEST
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hex_or_minus_one (const char *buf, const char **obuf)
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{
|
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ULONGEST ret;
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|
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if (startswith (buf, "-1"))
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{
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ret = (ULONGEST) -1;
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buf += 2;
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}
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else
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buf = unpack_varlen_hex (buf, &ret);
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|
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if (obuf)
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*obuf = buf;
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return ret;
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}
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|
|
/* 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
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read_ptid (const char *buf, const char **obuf)
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|
{
|
|
const char *p = buf;
|
|
const 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_t (pid, tid);
|
|
}
|
|
|
|
/* No multi-process. Just a tid. */
|
|
tid = hex_or_minus_one (p, &pp);
|
|
|
|
/* Since GDB is not sending a process id (multi-process extensions
|
|
are off), then there's only one process. Default to the first in
|
|
the list. */
|
|
pid = pid_of (get_first_process ());
|
|
|
|
if (obuf)
|
|
*obuf = pp;
|
|
return ptid_t (pid, tid);
|
|
}
|
|
|
|
/* Write COUNT bytes in BUF to the client.
|
|
The result is the number of bytes written or -1 if error.
|
|
This may return less than COUNT. */
|
|
|
|
static int
|
|
write_prim (const void *buf, int count)
|
|
{
|
|
if (remote_connection_is_stdio ())
|
|
return write (fileno (stdout), buf, count);
|
|
else
|
|
return write (remote_desc, buf, count);
|
|
}
|
|
|
|
/* Read COUNT bytes from the client and store in BUF.
|
|
The result is the number of bytes read or -1 if error.
|
|
This may return less than COUNT. */
|
|
|
|
static int
|
|
read_prim (void *buf, int count)
|
|
{
|
|
if (remote_connection_is_stdio ())
|
|
return read (fileno (stdin), buf, count);
|
|
else
|
|
return read (remote_desc, buf, count);
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
int i;
|
|
unsigned char csum = 0;
|
|
char *buf2;
|
|
char *p;
|
|
int cc;
|
|
|
|
buf2 = (char *) xmalloc (strlen ("$") + cnt + strlen ("#nn") + 1);
|
|
|
|
/* 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_prim (buf2, p - buf2) != p - buf2)
|
|
{
|
|
perror ("putpkt(write)");
|
|
free (buf2);
|
|
return -1;
|
|
}
|
|
|
|
if (cs.noack_mode || is_notif)
|
|
{
|
|
/* Don't expect an ack then. */
|
|
if (is_notif)
|
|
remote_debug_printf ("putpkt (\"%s\"); [notif]", buf2);
|
|
else
|
|
remote_debug_printf ("putpkt (\"%s\"); [noack mode]", buf2);
|
|
|
|
break;
|
|
}
|
|
|
|
remote_debug_printf ("putpkt (\"%s\"); [looking for ack]", buf2);
|
|
|
|
cc = readchar ();
|
|
|
|
if (cc < 0)
|
|
{
|
|
free (buf2);
|
|
return -1;
|
|
}
|
|
|
|
remote_debug_printf ("[received '%c' (0x%x)]", cc, cc);
|
|
|
|
/* Check for an input interrupt while we're here. */
|
|
if (cc == '\003' && current_thread != 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_prim (&c, 1);
|
|
|
|
if (cc == 0)
|
|
{
|
|
fprintf (stderr, "client connection closed\n");
|
|
return;
|
|
}
|
|
else if (cc != 1 || c != '\003')
|
|
{
|
|
fprintf (stderr, "input_interrupt, count = %d c = %d ", cc, c);
|
|
if (isprint (c))
|
|
fprintf (stderr, "('%c')\n", c);
|
|
else
|
|
fprintf (stderr, "('\\x%02x')\n", c & 0xff);
|
|
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 == -1)
|
|
return;
|
|
|
|
input_interrupt (0);
|
|
}
|
|
|
|
/* Asynchronous I/O support. SIGIO must be unblocked when waiting,
|
|
in order to accept Control-C from the client, and must be blocked
|
|
when talking to the client. */
|
|
|
|
static void
|
|
block_unblock_async_io (int block)
|
|
{
|
|
#ifndef USE_WIN32API
|
|
sigset_t sigio_set;
|
|
|
|
sigemptyset (&sigio_set);
|
|
sigaddset (&sigio_set, SIGIO);
|
|
gdb_sigmask (block ? SIG_BLOCK : SIG_UNBLOCK, &sigio_set, NULL);
|
|
#endif
|
|
}
|
|
|
|
/* 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;
|
|
|
|
block_unblock_async_io (0);
|
|
|
|
async_io_enabled = 1;
|
|
}
|
|
|
|
/* Disable asynchronous I/O. */
|
|
void
|
|
disable_async_io (void)
|
|
{
|
|
if (!async_io_enabled)
|
|
return;
|
|
|
|
block_unblock_async_io (1);
|
|
|
|
async_io_enabled = 0;
|
|
}
|
|
|
|
void
|
|
initialize_async_io (void)
|
|
{
|
|
/* Make sure that async I/O starts blocked. */
|
|
async_io_enabled = 1;
|
|
disable_async_io ();
|
|
|
|
/* Install the signal handler. */
|
|
#ifndef USE_WIN32API
|
|
signal (SIGIO, input_interrupt);
|
|
#endif
|
|
}
|
|
|
|
/* 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_prim (readchar_buf, sizeof (readchar_buf));
|
|
|
|
if (readchar_bufcnt <= 0)
|
|
{
|
|
if (readchar_bufcnt == 0)
|
|
{
|
|
remote_debug_printf ("readchar: Got EOF");
|
|
}
|
|
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_timer (readchar_callback);
|
|
readchar_callback = NOT_SCHEDULED;
|
|
}
|
|
}
|
|
|
|
/* Process remaining data in readchar_buf. */
|
|
|
|
static void
|
|
process_remaining (void *context)
|
|
{
|
|
/* This is a one-shot event. */
|
|
readchar_callback = NOT_SCHEDULED;
|
|
|
|
if (readchar_bufcnt > 0)
|
|
handle_serial_event (0, NULL);
|
|
}
|
|
|
|
/* 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 = create_timer (0, 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)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
char *bp;
|
|
unsigned char csum, c1, c2;
|
|
int c;
|
|
|
|
while (1)
|
|
{
|
|
csum = 0;
|
|
|
|
while (1)
|
|
{
|
|
c = readchar ();
|
|
|
|
/* The '\003' may appear before or after each packet, so
|
|
check for an input interrupt. */
|
|
if (c == '\003')
|
|
{
|
|
the_target->request_interrupt ();
|
|
continue;
|
|
}
|
|
|
|
if (c == '$')
|
|
break;
|
|
|
|
remote_debug_printf ("[getpkt: discarding char '%c']", c);
|
|
|
|
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 (cs.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_prim ("-", 1) != 1)
|
|
return -1;
|
|
}
|
|
|
|
if (!cs.noack_mode)
|
|
{
|
|
remote_debug_printf ("getpkt (\"%s\"); [sending ack]", buf);
|
|
|
|
if (write_prim ("+", 1) != 1)
|
|
return -1;
|
|
|
|
remote_debug_printf ("[sent ack]");
|
|
}
|
|
else
|
|
remote_debug_printf ("getpkt (\"%s\"); [no ack sent]", buf);
|
|
|
|
/* The readchar above may have already read a '\003' out of the socket
|
|
and moved it to the local buffer. For example, when GDB sends
|
|
vCont;c immediately followed by interrupt (see
|
|
gdb.base/interrupt-noterm.exp). As soon as we see the vCont;c, we'll
|
|
resume the inferior and wait. Since we've already moved the '\003'
|
|
to the local buffer, SIGIO won't help. In that case, if we don't
|
|
check for interrupt after the vCont;c packet, the interrupt character
|
|
would stay in the buffer unattended until after the next (unrelated)
|
|
stop. */
|
|
while (readchar_bufcnt > 0 && *readchar_bufp == '\003')
|
|
{
|
|
/* Consume the interrupt character in the buffer. */
|
|
readchar ();
|
|
the_target->request_interrupt ();
|
|
}
|
|
|
|
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
|
|
|
|
#ifndef IN_PROCESS_AGENT
|
|
|
|
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 (regcache->tdesc, regno);
|
|
*buf++ = ';';
|
|
|
|
return buf;
|
|
}
|
|
|
|
void
|
|
prepare_resume_reply (char *buf, ptid_t ptid, const target_waitstatus &status)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
threads_debug_printf ("Writing resume reply for %s:%d",
|
|
target_pid_to_str (ptid).c_str (), status.kind ());
|
|
|
|
switch (status.kind ())
|
|
{
|
|
case TARGET_WAITKIND_STOPPED:
|
|
case TARGET_WAITKIND_FORKED:
|
|
case TARGET_WAITKIND_VFORKED:
|
|
case TARGET_WAITKIND_VFORK_DONE:
|
|
case TARGET_WAITKIND_EXECD:
|
|
case TARGET_WAITKIND_THREAD_CREATED:
|
|
case TARGET_WAITKIND_SYSCALL_ENTRY:
|
|
case TARGET_WAITKIND_SYSCALL_RETURN:
|
|
{
|
|
const char **regp;
|
|
struct regcache *regcache;
|
|
char *buf_start = buf;
|
|
|
|
if ((status.kind () == TARGET_WAITKIND_FORKED && cs.report_fork_events)
|
|
|| (status.kind () == TARGET_WAITKIND_VFORKED
|
|
&& cs.report_vfork_events))
|
|
{
|
|
enum gdb_signal signal = GDB_SIGNAL_TRAP;
|
|
const char *event = (status.kind () == TARGET_WAITKIND_FORKED
|
|
? "fork" : "vfork");
|
|
|
|
sprintf (buf, "T%02x%s:", signal, event);
|
|
buf += strlen (buf);
|
|
buf = write_ptid (buf, status.child_ptid ());
|
|
strcat (buf, ";");
|
|
}
|
|
else if (status.kind () == TARGET_WAITKIND_VFORK_DONE
|
|
&& cs.report_vfork_events)
|
|
{
|
|
enum gdb_signal signal = GDB_SIGNAL_TRAP;
|
|
|
|
sprintf (buf, "T%02xvforkdone:;", signal);
|
|
}
|
|
else if (status.kind () == TARGET_WAITKIND_EXECD && cs.report_exec_events)
|
|
{
|
|
enum gdb_signal signal = GDB_SIGNAL_TRAP;
|
|
const char *event = "exec";
|
|
char hexified_pathname[PATH_MAX * 2];
|
|
|
|
sprintf (buf, "T%02x%s:", signal, event);
|
|
buf += strlen (buf);
|
|
|
|
/* Encode pathname to hexified format. */
|
|
bin2hex ((const gdb_byte *) status.execd_pathname (),
|
|
hexified_pathname,
|
|
strlen (status.execd_pathname ()));
|
|
|
|
sprintf (buf, "%s;", hexified_pathname);
|
|
buf += strlen (buf);
|
|
}
|
|
else if (status.kind () == TARGET_WAITKIND_THREAD_CREATED
|
|
&& cs.report_thread_events)
|
|
{
|
|
enum gdb_signal signal = GDB_SIGNAL_TRAP;
|
|
|
|
sprintf (buf, "T%02xcreate:;", signal);
|
|
}
|
|
else if (status.kind () == TARGET_WAITKIND_SYSCALL_ENTRY
|
|
|| status.kind () == TARGET_WAITKIND_SYSCALL_RETURN)
|
|
{
|
|
enum gdb_signal signal = GDB_SIGNAL_TRAP;
|
|
const char *event = (status.kind () == TARGET_WAITKIND_SYSCALL_ENTRY
|
|
? "syscall_entry" : "syscall_return");
|
|
|
|
sprintf (buf, "T%02x%s:%x;", signal, event,
|
|
status.syscall_number ());
|
|
}
|
|
else
|
|
sprintf (buf, "T%02x", status.sig ());
|
|
|
|
if (disable_packet_T)
|
|
{
|
|
/* This is a bit (OK, a lot) of a kludge, however, this isn't
|
|
really a user feature, but exists only so GDB can use the
|
|
gdbserver to test handling of the 'S' stop reply packet, so
|
|
we would rather this code be as simple as possible.
|
|
|
|
By this point we've started to build the 'T' stop packet,
|
|
and it should look like 'Txx....' where 'x' is a hex digit.
|
|
An 'S' stop packet always looks like 'Sxx', so all we do
|
|
here is convert the buffer from a T packet to an S packet
|
|
and the avoid adding any extra content by breaking out. */
|
|
gdb_assert (buf_start[0] == 'T');
|
|
gdb_assert (isxdigit (buf_start[1]));
|
|
gdb_assert (isxdigit (buf_start[2]));
|
|
buf_start[0] = 'S';
|
|
buf_start[3] = '\0';
|
|
break;
|
|
}
|
|
|
|
buf += strlen (buf);
|
|
|
|
scoped_restore_current_thread restore_thread;
|
|
|
|
switch_to_thread (the_target, ptid);
|
|
|
|
regp = current_target_desc ()->expedite_regs;
|
|
|
|
regcache = get_thread_regcache (current_thread, 1);
|
|
|
|
if (the_target->stopped_by_watchpoint ())
|
|
{
|
|
CORE_ADDR addr;
|
|
int i;
|
|
|
|
memcpy (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++ = ';';
|
|
}
|
|
else if (cs.swbreak_feature && target_stopped_by_sw_breakpoint ())
|
|
{
|
|
sprintf (buf, "swbreak:;");
|
|
buf += strlen (buf);
|
|
}
|
|
else if (cs.hwbreak_feature && target_stopped_by_hw_breakpoint ())
|
|
{
|
|
sprintf (buf, "hwbreak:;");
|
|
buf += strlen (buf);
|
|
}
|
|
|
|
while (*regp)
|
|
{
|
|
buf = outreg (regcache, find_regno (regcache->tdesc, *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 || cs.general_thread != ptid)
|
|
{
|
|
int core = -1;
|
|
/* In non-stop, don't change the general thread behind
|
|
GDB's back. */
|
|
if (!non_stop)
|
|
cs.general_thread = ptid;
|
|
sprintf (buf, "thread:");
|
|
buf += strlen (buf);
|
|
buf = write_ptid (buf, ptid);
|
|
strcat (buf, ";");
|
|
buf += strlen (buf);
|
|
|
|
core = target_core_of_thread (ptid);
|
|
|
|
if (core != -1)
|
|
{
|
|
sprintf (buf, "core:");
|
|
buf += strlen (buf);
|
|
sprintf (buf, "%x", core);
|
|
strcat (buf, ";");
|
|
buf += strlen (buf);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (current_process ()->dlls_changed)
|
|
{
|
|
strcpy (buf, "library:;");
|
|
buf += strlen (buf);
|
|
current_process ()->dlls_changed = false;
|
|
}
|
|
}
|
|
break;
|
|
case TARGET_WAITKIND_EXITED:
|
|
if (cs.multi_process)
|
|
sprintf (buf, "W%x;process:%x",
|
|
status.exit_status (), ptid.pid ());
|
|
else
|
|
sprintf (buf, "W%02x", status.exit_status ());
|
|
break;
|
|
case TARGET_WAITKIND_SIGNALLED:
|
|
if (cs.multi_process)
|
|
sprintf (buf, "X%x;process:%x",
|
|
status.sig (), ptid.pid ());
|
|
else
|
|
sprintf (buf, "X%02x", status.sig ());
|
|
break;
|
|
case TARGET_WAITKIND_THREAD_EXITED:
|
|
sprintf (buf, "w%x;", status.exit_status ());
|
|
buf += strlen (buf);
|
|
buf = write_ptid (buf, ptid);
|
|
break;
|
|
case TARGET_WAITKIND_NO_RESUMED:
|
|
sprintf (buf, "N");
|
|
break;
|
|
default:
|
|
error ("unhandled waitkind");
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* See remote-utils.h. */
|
|
|
|
const char *
|
|
decode_m_packet_params (const char *from, CORE_ADDR *mem_addr_ptr,
|
|
unsigned int *len_ptr, const char end_marker)
|
|
{
|
|
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++]) != end_marker)
|
|
{
|
|
*len_ptr = *len_ptr << 4;
|
|
*len_ptr |= fromhex (ch) & 0x0f;
|
|
}
|
|
|
|
return from + i;
|
|
}
|
|
|
|
void
|
|
decode_m_packet (const char *from, CORE_ADDR *mem_addr_ptr,
|
|
unsigned int *len_ptr)
|
|
{
|
|
decode_m_packet_params (from, mem_addr_ptr, len_ptr, '\0');
|
|
}
|
|
|
|
void
|
|
decode_M_packet (const char *from, CORE_ADDR *mem_addr_ptr,
|
|
unsigned int *len_ptr, unsigned char **to_p)
|
|
{
|
|
from = decode_m_packet_params (from, mem_addr_ptr, len_ptr, ':');
|
|
|
|
if (*to_p == NULL)
|
|
*to_p = (unsigned char *) xmalloc (*len_ptr);
|
|
|
|
hex2bin (from, *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 = (unsigned char *) 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, CORE_ADDR *offset,
|
|
unsigned int *len, unsigned char *data)
|
|
{
|
|
char ch;
|
|
char *b = buf;
|
|
|
|
/* Extract the offset. */
|
|
*offset = 0;
|
|
while ((ch = *buf++) != ':')
|
|
{
|
|
*offset = *offset << 4;
|
|
*offset |= fromhex (ch) & 0x0f;
|
|
}
|
|
|
|
/* Get encoded data. */
|
|
packet_len -= buf - b;
|
|
*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)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
char *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 (cs.own_buf, "qSymbol:");
|
|
bin2hex ((const gdb_byte *) name, cs.own_buf + strlen ("qSymbol:"),
|
|
strlen (name));
|
|
if (putpkt (cs.own_buf) < 0)
|
|
return -1;
|
|
|
|
/* FIXME: Eventually add buffer overflow checking (to getpkt?) */
|
|
len = getpkt (cs.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 and handle 'v' packets (for vFile transfers)
|
|
while it figures out the address of the symbol. */
|
|
while (1)
|
|
{
|
|
if (cs.own_buf[0] == 'm')
|
|
{
|
|
CORE_ADDR mem_addr;
|
|
unsigned char *mem_buf;
|
|
unsigned int mem_len;
|
|
|
|
decode_m_packet (&cs.own_buf[1], &mem_addr, &mem_len);
|
|
mem_buf = (unsigned char *) xmalloc (mem_len);
|
|
if (read_inferior_memory (mem_addr, mem_buf, mem_len) == 0)
|
|
bin2hex (mem_buf, cs.own_buf, mem_len);
|
|
else
|
|
write_enn (cs.own_buf);
|
|
free (mem_buf);
|
|
if (putpkt (cs.own_buf) < 0)
|
|
return -1;
|
|
}
|
|
else if (cs.own_buf[0] == 'v')
|
|
{
|
|
int new_len = -1;
|
|
handle_v_requests (cs.own_buf, len, &new_len);
|
|
if (new_len != -1)
|
|
putpkt_binary (cs.own_buf, new_len);
|
|
else
|
|
putpkt (cs.own_buf);
|
|
}
|
|
else
|
|
break;
|
|
len = getpkt (cs.own_buf);
|
|
if (len < 0)
|
|
return -1;
|
|
}
|
|
|
|
if (!startswith (cs.own_buf, "qSymbol:"))
|
|
{
|
|
warning ("Malformed response to qSymbol, ignoring: %s", cs.own_buf);
|
|
return -1;
|
|
}
|
|
|
|
p = cs.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 = XNEW (struct sym_cache);
|
|
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 OLDLOC. 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)
|
|
{
|
|
client_state &cs = get_client_state ();
|
|
int len;
|
|
ULONGEST written = 0;
|
|
|
|
/* Send the request. */
|
|
sprintf (cs.own_buf, "qRelocInsn:%s;%s", paddress (oldloc),
|
|
paddress (*to));
|
|
if (putpkt (cs.own_buf) < 0)
|
|
return -1;
|
|
|
|
/* FIXME: Eventually add buffer overflow checking (to getpkt?) */
|
|
len = getpkt (cs.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 (cs.own_buf[0] == 'm' || cs.own_buf[0] == 'M' || cs.own_buf[0] == 'X')
|
|
{
|
|
CORE_ADDR mem_addr;
|
|
unsigned char *mem_buf = NULL;
|
|
unsigned int mem_len;
|
|
|
|
if (cs.own_buf[0] == 'm')
|
|
{
|
|
decode_m_packet (&cs.own_buf[1], &mem_addr, &mem_len);
|
|
mem_buf = (unsigned char *) xmalloc (mem_len);
|
|
if (read_inferior_memory (mem_addr, mem_buf, mem_len) == 0)
|
|
bin2hex (mem_buf, cs.own_buf, mem_len);
|
|
else
|
|
write_enn (cs.own_buf);
|
|
}
|
|
else if (cs.own_buf[0] == 'X')
|
|
{
|
|
if (decode_X_packet (&cs.own_buf[1], len - 1, &mem_addr,
|
|
&mem_len, &mem_buf) < 0
|
|
|| target_write_memory (mem_addr, mem_buf, mem_len) != 0)
|
|
write_enn (cs.own_buf);
|
|
else
|
|
write_ok (cs.own_buf);
|
|
}
|
|
else
|
|
{
|
|
decode_M_packet (&cs.own_buf[1], &mem_addr, &mem_len, &mem_buf);
|
|
if (target_write_memory (mem_addr, mem_buf, mem_len) == 0)
|
|
write_ok (cs.own_buf);
|
|
else
|
|
write_enn (cs.own_buf);
|
|
}
|
|
free (mem_buf);
|
|
if (putpkt (cs.own_buf) < 0)
|
|
return -1;
|
|
len = getpkt (cs.own_buf);
|
|
if (len < 0)
|
|
return -1;
|
|
}
|
|
|
|
if (cs.own_buf[0] == 'E')
|
|
{
|
|
warning ("An error occurred while relocating an instruction: %s",
|
|
cs.own_buf);
|
|
return -1;
|
|
}
|
|
|
|
if (!startswith (cs.own_buf, "qRelocInsn:"))
|
|
{
|
|
warning ("Malformed response to qRelocInsn, ignoring: %s",
|
|
cs.own_buf);
|
|
return -1;
|
|
}
|
|
|
|
unpack_varlen_hex (cs.own_buf + strlen ("qRelocInsn:"), &written);
|
|
|
|
*to += written;
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
monitor_output (const char *msg)
|
|
{
|
|
int len = strlen (msg);
|
|
char *buf = (char *) xmalloc (len * 2 + 2);
|
|
|
|
buf[0] = 'O';
|
|
bin2hex ((const gdb_byte *) msg, buf + 1, len);
|
|
|
|
putpkt (buf);
|
|
free (buf);
|
|
}
|
|
|
|
#endif
|