mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-03 23:34:02 +08:00
a6f3e723d3
2008-08-12 Sandra Loosemore <sandra@codesourcery.com> * gdb.texinfo (Remote Configuration): Document set remote noack-packet. (Remote Protocol): Add Packet Acknowledgment to menu. (Overview): Mention +/- can be disabled, and point to new section where this is discussed in detail. (General Query Packets): Document QStartNoAckMode packet, and corresponding qSupported reply. (Packet Acknowledgment): New section. gdb/ 2008-08-12 Pedro Alves <pedro@codesourcery.com> Add no-ack mode to the remote protocol --- optionally stop ACKing packets and responses when we have a reliable communication medium. Based on Apple's GDB, by Jason Molenda <jmolenda@apple.com> * remote.c (struct remote_state): Add noack_mode field. (PACKET_QStartNoAckMode): New. (remote_start_remote): Don't any outstanding packet here. (remote_open_1): Clear noack_mode. Ack any outstanding packet here. Activate noack mode if requested. (remote_protocol_features): Add QStartNoAckMode. (remote_open_1): (putpkt_binary): Don't send ack in noack mode. (read_frame): Don't recompute the checksum in noack mode. (getpkt_sane): Skip sending ack if in noack mode. (_initialize_remote): Add set/show remote noack mode. * NEWS: Note the new features. gdb/gdbserver/ 2008-08-12 Pedro Alves <pedro@codesourcery.com> * remote-utils.c (noack_mode, transport_is_reliable): New globals. (remote_open): Set or clear transport_is_reliable. (putpkt_binary): Don't expect acks in noack mode. (getpkt): Don't send ack/nac in noack mode. * server.c (handle_general_set): Handle QStartNoAckMode. (handle_query): If connected by tcp pass QStartNoAckMode+ in qSupported. (main): Reset noack_mode on every connection. * server.h (noack_mode): Declare.
1844 lines
43 KiB
C
1844 lines
43 KiB
C
/* Main code for remote server for GDB.
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Copyright (C) 1989, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2002, 2003,
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2004, 2005, 2006, 2007, 2008 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_UNISTD_H
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#include <unistd.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_SYS_WAIT_H
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#include <sys/wait.h>
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#endif
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#if HAVE_MALLOC_H
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#include <malloc.h>
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#endif
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unsigned long cont_thread;
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unsigned long general_thread;
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unsigned long step_thread;
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unsigned long thread_from_wait;
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unsigned long old_thread_from_wait;
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int server_waiting;
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static int extended_protocol;
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static int attached;
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static int response_needed;
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static int exit_requested;
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static char **program_argv, **wrapper_argv;
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/* Enable miscellaneous debugging output. The name is historical - it
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was originally used to debug LinuxThreads support. */
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int debug_threads;
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int pass_signals[TARGET_SIGNAL_LAST];
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jmp_buf toplevel;
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const char *gdbserver_xmltarget;
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/* The PID of the originally created or attached inferior. Used to
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send signals to the process when GDB sends us an asynchronous interrupt
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(user hitting Control-C in the client), and to wait for the child to exit
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when no longer debugging it. */
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unsigned long signal_pid;
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#ifdef SIGTTOU
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/* A file descriptor for the controlling terminal. */
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int terminal_fd;
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/* TERMINAL_FD's original foreground group. */
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pid_t old_foreground_pgrp;
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/* Hand back terminal ownership to the original foreground group. */
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static void
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restore_old_foreground_pgrp (void)
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{
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tcsetpgrp (terminal_fd, old_foreground_pgrp);
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}
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#endif
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/* Set if you want to disable optional thread related packets support
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in gdbserver, for the sake of testing GDB against stubs that don't
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support them. */
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int disable_packet_vCont;
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int disable_packet_Tthread;
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int disable_packet_qC;
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int disable_packet_qfThreadInfo;
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static int
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target_running (void)
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{
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return all_threads.head != NULL;
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}
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static int
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start_inferior (char **argv, char *statusptr)
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{
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char **new_argv = argv;
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attached = 0;
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if (wrapper_argv != NULL)
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{
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int i, count = 1;
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for (i = 0; wrapper_argv[i] != NULL; i++)
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count++;
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for (i = 0; argv[i] != NULL; i++)
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count++;
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new_argv = alloca (sizeof (char *) * count);
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count = 0;
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for (i = 0; wrapper_argv[i] != NULL; i++)
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new_argv[count++] = wrapper_argv[i];
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for (i = 0; argv[i] != NULL; i++)
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new_argv[count++] = argv[i];
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new_argv[count] = NULL;
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}
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#ifdef SIGTTOU
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signal (SIGTTOU, SIG_DFL);
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signal (SIGTTIN, SIG_DFL);
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#endif
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signal_pid = create_inferior (new_argv[0], new_argv);
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/* FIXME: we don't actually know at this point that the create
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actually succeeded. We won't know that until we wait. */
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fprintf (stderr, "Process %s created; pid = %ld\n", argv[0],
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signal_pid);
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fflush (stderr);
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#ifdef SIGTTOU
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signal (SIGTTOU, SIG_IGN);
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signal (SIGTTIN, SIG_IGN);
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terminal_fd = fileno (stderr);
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old_foreground_pgrp = tcgetpgrp (terminal_fd);
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tcsetpgrp (terminal_fd, signal_pid);
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atexit (restore_old_foreground_pgrp);
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#endif
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if (wrapper_argv != NULL)
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{
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struct thread_resume resume_info;
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int sig;
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resume_info.thread = -1;
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resume_info.step = 0;
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resume_info.sig = 0;
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resume_info.leave_stopped = 0;
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sig = mywait (statusptr, 0);
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if (*statusptr != 'T')
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return sig;
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do
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{
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(*the_target->resume) (&resume_info);
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sig = mywait (statusptr, 0);
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if (*statusptr != 'T')
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return sig;
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}
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while (sig != TARGET_SIGNAL_TRAP);
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return sig;
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}
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/* Wait till we are at 1st instruction in program, return signal
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number (assuming success). */
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return mywait (statusptr, 0);
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}
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static int
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attach_inferior (int pid, char *statusptr, int *sigptr)
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{
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/* myattach should return -1 if attaching is unsupported,
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0 if it succeeded, and call error() otherwise. */
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if (myattach (pid) != 0)
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return -1;
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attached = 1;
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fprintf (stderr, "Attached; pid = %d\n", pid);
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fflush (stderr);
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/* FIXME - It may be that we should get the SIGNAL_PID from the
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attach function, so that it can be the main thread instead of
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whichever we were told to attach to. */
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signal_pid = pid;
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*sigptr = mywait (statusptr, 0);
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/* GDB knows to ignore the first SIGSTOP after attaching to a running
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process using the "attach" command, but this is different; it's
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just using "target remote". Pretend it's just starting up. */
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if (*statusptr == 'T' && *sigptr == TARGET_SIGNAL_STOP)
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*sigptr = TARGET_SIGNAL_TRAP;
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return 0;
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}
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extern int remote_debug;
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/* Decode a qXfer read request. Return 0 if everything looks OK,
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or -1 otherwise. */
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static int
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decode_xfer_read (char *buf, char **annex, CORE_ADDR *ofs, unsigned int *len)
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{
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/* Extract and NUL-terminate the annex. */
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*annex = buf;
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while (*buf && *buf != ':')
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buf++;
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if (*buf == '\0')
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return -1;
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*buf++ = 0;
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/* After the read marker and annex, qXfer looks like a
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traditional 'm' packet. */
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decode_m_packet (buf, ofs, len);
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return 0;
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}
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/* Write the response to a successful qXfer read. Returns the
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length of the (binary) data stored in BUF, corresponding
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to as much of DATA/LEN as we could fit. IS_MORE controls
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the first character of the response. */
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static int
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write_qxfer_response (char *buf, const void *data, int len, int is_more)
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{
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int out_len;
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if (is_more)
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buf[0] = 'm';
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else
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buf[0] = 'l';
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return remote_escape_output (data, len, (unsigned char *) buf + 1, &out_len,
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PBUFSIZ - 2) + 1;
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}
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/* Handle all of the extended 'Q' packets. */
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void
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handle_general_set (char *own_buf)
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{
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if (strncmp ("QPassSignals:", own_buf, strlen ("QPassSignals:")) == 0)
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{
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int numsigs = (int) TARGET_SIGNAL_LAST, i;
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const char *p = own_buf + strlen ("QPassSignals:");
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CORE_ADDR cursig;
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p = decode_address_to_semicolon (&cursig, p);
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for (i = 0; i < numsigs; i++)
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{
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if (i == cursig)
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{
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pass_signals[i] = 1;
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if (*p == '\0')
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/* Keep looping, to clear the remaining signals. */
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cursig = -1;
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else
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p = decode_address_to_semicolon (&cursig, p);
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}
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else
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pass_signals[i] = 0;
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}
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strcpy (own_buf, "OK");
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return;
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}
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if (strcmp (own_buf, "QStartNoAckMode") == 0)
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{
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if (remote_debug)
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{
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fprintf (stderr, "[noack mode enabled]\n");
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fflush (stderr);
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}
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noack_mode = 1;
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write_ok (own_buf);
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return;
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}
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/* Otherwise we didn't know what packet it was. Say we didn't
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understand it. */
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own_buf[0] = 0;
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}
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static const char *
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get_features_xml (const char *annex)
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{
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/* gdbserver_xmltarget defines what to return when looking
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for the "target.xml" file. Its contents can either be
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verbatim XML code (prefixed with a '@') or else the name
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of the actual XML file to be used in place of "target.xml".
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This variable is set up from the auto-generated
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init_registers_... routine for the current target. */
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if (gdbserver_xmltarget
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&& strcmp (annex, "target.xml") == 0)
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{
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if (*gdbserver_xmltarget == '@')
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return gdbserver_xmltarget + 1;
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else
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annex = gdbserver_xmltarget;
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}
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#ifdef USE_XML
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{
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extern const char *const xml_builtin[][2];
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int i;
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/* Look for the annex. */
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for (i = 0; xml_builtin[i][0] != NULL; i++)
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if (strcmp (annex, xml_builtin[i][0]) == 0)
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break;
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if (xml_builtin[i][0] != NULL)
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return xml_builtin[i][1];
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}
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#endif
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return NULL;
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}
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void
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monitor_show_help (void)
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{
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monitor_output ("The following monitor commands are supported:\n");
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monitor_output (" set debug <0|1>\n");
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monitor_output (" Enable general debugging messages\n");
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monitor_output (" set remote-debug <0|1>\n");
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monitor_output (" Enable remote protocol debugging messages\n");
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monitor_output (" exit\n");
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monitor_output (" Quit GDBserver\n");
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}
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/* Subroutine of handle_search_memory to simplify it. */
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static int
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handle_search_memory_1 (CORE_ADDR start_addr, CORE_ADDR search_space_len,
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gdb_byte *pattern, unsigned pattern_len,
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gdb_byte *search_buf,
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unsigned chunk_size, unsigned search_buf_size,
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CORE_ADDR *found_addrp)
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{
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/* Prime the search buffer. */
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if (read_inferior_memory (start_addr, search_buf, search_buf_size) != 0)
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{
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warning ("Unable to access target memory at 0x%lx, halting search.",
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(long) start_addr);
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return -1;
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}
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/* Perform the search.
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The loop is kept simple by allocating [N + pattern-length - 1] bytes.
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When we've scanned N bytes we copy the trailing bytes to the start and
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read in another N bytes. */
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while (search_space_len >= pattern_len)
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{
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gdb_byte *found_ptr;
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unsigned nr_search_bytes = (search_space_len < search_buf_size
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? search_space_len
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: search_buf_size);
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found_ptr = memmem (search_buf, nr_search_bytes, pattern, pattern_len);
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if (found_ptr != NULL)
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{
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CORE_ADDR found_addr = start_addr + (found_ptr - search_buf);
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*found_addrp = found_addr;
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return 1;
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}
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/* Not found in this chunk, skip to next chunk. */
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/* Don't let search_space_len wrap here, it's unsigned. */
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if (search_space_len >= chunk_size)
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search_space_len -= chunk_size;
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else
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search_space_len = 0;
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if (search_space_len >= pattern_len)
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{
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unsigned keep_len = search_buf_size - chunk_size;
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CORE_ADDR read_addr = start_addr + keep_len;
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int nr_to_read;
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/* Copy the trailing part of the previous iteration to the front
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of the buffer for the next iteration. */
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memcpy (search_buf, search_buf + chunk_size, keep_len);
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nr_to_read = (search_space_len - keep_len < chunk_size
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? search_space_len - keep_len
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: chunk_size);
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if (read_inferior_memory (read_addr, search_buf + keep_len,
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nr_to_read) != 0)
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{
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warning ("Unable to access target memory at 0x%lx, halting search.",
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(long) read_addr);
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return -1;
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}
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start_addr += chunk_size;
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}
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}
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/* Not found. */
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return 0;
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}
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/* Handle qSearch:memory packets. */
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static void
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handle_search_memory (char *own_buf, int packet_len)
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{
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CORE_ADDR start_addr;
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CORE_ADDR search_space_len;
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gdb_byte *pattern;
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unsigned int pattern_len;
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/* NOTE: also defined in find.c testcase. */
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#define SEARCH_CHUNK_SIZE 16000
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const unsigned chunk_size = SEARCH_CHUNK_SIZE;
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/* Buffer to hold memory contents for searching. */
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gdb_byte *search_buf;
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unsigned search_buf_size;
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int found;
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CORE_ADDR found_addr;
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int cmd_name_len = sizeof ("qSearch:memory:") - 1;
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pattern = malloc (packet_len);
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if (pattern == NULL)
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{
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error ("Unable to allocate memory to perform the search");
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strcpy (own_buf, "E00");
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return;
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}
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if (decode_search_memory_packet (own_buf + cmd_name_len,
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packet_len - cmd_name_len,
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&start_addr, &search_space_len,
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pattern, &pattern_len) < 0)
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{
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free (pattern);
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error ("Error in parsing qSearch:memory packet");
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strcpy (own_buf, "E00");
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return;
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}
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search_buf_size = chunk_size + pattern_len - 1;
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/* No point in trying to allocate a buffer larger than the search space. */
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if (search_space_len < search_buf_size)
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search_buf_size = search_space_len;
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search_buf = malloc (search_buf_size);
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if (search_buf == NULL)
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{
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free (pattern);
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error ("Unable to allocate memory to perform the search");
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strcpy (own_buf, "E00");
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return;
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}
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found = handle_search_memory_1 (start_addr, search_space_len,
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pattern, pattern_len,
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search_buf, chunk_size, search_buf_size,
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&found_addr);
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if (found > 0)
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|
sprintf (own_buf, "1,%lx", (long) found_addr);
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|
else if (found == 0)
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strcpy (own_buf, "0");
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|
else
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|
strcpy (own_buf, "E00");
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|
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free (search_buf);
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|
free (pattern);
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|
}
|
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|
|
#define require_running(BUF) \
|
|
if (!target_running ()) \
|
|
{ \
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|
write_enn (BUF); \
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|
return; \
|
|
}
|
|
|
|
/* Handle all of the extended 'q' packets. */
|
|
void
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|
handle_query (char *own_buf, int packet_len, int *new_packet_len_p)
|
|
{
|
|
static struct inferior_list_entry *thread_ptr;
|
|
|
|
/* Reply the current thread id. */
|
|
if (strcmp ("qC", own_buf) == 0 && !disable_packet_qC)
|
|
{
|
|
require_running (own_buf);
|
|
thread_ptr = all_threads.head;
|
|
sprintf (own_buf, "QC%x",
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|
thread_to_gdb_id ((struct thread_info *)thread_ptr));
|
|
return;
|
|
}
|
|
|
|
if (strcmp ("qSymbol::", own_buf) == 0)
|
|
{
|
|
if (target_running () && the_target->look_up_symbols != NULL)
|
|
(*the_target->look_up_symbols) ();
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|
|
strcpy (own_buf, "OK");
|
|
return;
|
|
}
|
|
|
|
if (!disable_packet_qfThreadInfo)
|
|
{
|
|
if (strcmp ("qfThreadInfo", own_buf) == 0)
|
|
{
|
|
require_running (own_buf);
|
|
thread_ptr = all_threads.head;
|
|
sprintf (own_buf, "m%x", thread_to_gdb_id ((struct thread_info *)thread_ptr));
|
|
thread_ptr = thread_ptr->next;
|
|
return;
|
|
}
|
|
|
|
if (strcmp ("qsThreadInfo", own_buf) == 0)
|
|
{
|
|
require_running (own_buf);
|
|
if (thread_ptr != NULL)
|
|
{
|
|
sprintf (own_buf, "m%x", thread_to_gdb_id ((struct thread_info *)thread_ptr));
|
|
thread_ptr = thread_ptr->next;
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
sprintf (own_buf, "l");
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (the_target->read_offsets != NULL
|
|
&& strcmp ("qOffsets", own_buf) == 0)
|
|
{
|
|
CORE_ADDR text, data;
|
|
|
|
require_running (own_buf);
|
|
if (the_target->read_offsets (&text, &data))
|
|
sprintf (own_buf, "Text=%lX;Data=%lX;Bss=%lX",
|
|
(long)text, (long)data, (long)data);
|
|
else
|
|
write_enn (own_buf);
|
|
|
|
return;
|
|
}
|
|
|
|
if (the_target->qxfer_spu != NULL
|
|
&& strncmp ("qXfer:spu:read:", own_buf, 15) == 0)
|
|
{
|
|
char *annex;
|
|
int n;
|
|
unsigned int len;
|
|
CORE_ADDR ofs;
|
|
unsigned char *spu_buf;
|
|
|
|
require_running (own_buf);
|
|
strcpy (own_buf, "E00");
|
|
if (decode_xfer_read (own_buf + 15, &annex, &ofs, &len) < 0)
|
|
return;
|
|
if (len > PBUFSIZ - 2)
|
|
len = PBUFSIZ - 2;
|
|
spu_buf = malloc (len + 1);
|
|
if (!spu_buf)
|
|
return;
|
|
|
|
n = (*the_target->qxfer_spu) (annex, spu_buf, NULL, ofs, len + 1);
|
|
if (n < 0)
|
|
write_enn (own_buf);
|
|
else if (n > len)
|
|
*new_packet_len_p = write_qxfer_response
|
|
(own_buf, spu_buf, len, 1);
|
|
else
|
|
*new_packet_len_p = write_qxfer_response
|
|
(own_buf, spu_buf, n, 0);
|
|
|
|
free (spu_buf);
|
|
return;
|
|
}
|
|
|
|
if (the_target->qxfer_spu != NULL
|
|
&& strncmp ("qXfer:spu:write:", own_buf, 16) == 0)
|
|
{
|
|
char *annex;
|
|
int n;
|
|
unsigned int len;
|
|
CORE_ADDR ofs;
|
|
unsigned char *spu_buf;
|
|
|
|
require_running (own_buf);
|
|
strcpy (own_buf, "E00");
|
|
spu_buf = malloc (packet_len - 15);
|
|
if (!spu_buf)
|
|
return;
|
|
if (decode_xfer_write (own_buf + 16, packet_len - 16, &annex,
|
|
&ofs, &len, spu_buf) < 0)
|
|
{
|
|
free (spu_buf);
|
|
return;
|
|
}
|
|
|
|
n = (*the_target->qxfer_spu)
|
|
(annex, NULL, (unsigned const char *)spu_buf, ofs, len);
|
|
if (n < 0)
|
|
write_enn (own_buf);
|
|
else
|
|
sprintf (own_buf, "%x", n);
|
|
|
|
free (spu_buf);
|
|
return;
|
|
}
|
|
|
|
if (the_target->read_auxv != NULL
|
|
&& strncmp ("qXfer:auxv:read:", own_buf, 16) == 0)
|
|
{
|
|
unsigned char *data;
|
|
int n;
|
|
CORE_ADDR ofs;
|
|
unsigned int len;
|
|
char *annex;
|
|
|
|
require_running (own_buf);
|
|
|
|
/* Reject any annex; grab the offset and length. */
|
|
if (decode_xfer_read (own_buf + 16, &annex, &ofs, &len) < 0
|
|
|| annex[0] != '\0')
|
|
{
|
|
strcpy (own_buf, "E00");
|
|
return;
|
|
}
|
|
|
|
/* Read one extra byte, as an indicator of whether there is
|
|
more. */
|
|
if (len > PBUFSIZ - 2)
|
|
len = PBUFSIZ - 2;
|
|
data = malloc (len + 1);
|
|
n = (*the_target->read_auxv) (ofs, data, len + 1);
|
|
if (n < 0)
|
|
write_enn (own_buf);
|
|
else if (n > len)
|
|
*new_packet_len_p = write_qxfer_response (own_buf, data, len, 1);
|
|
else
|
|
*new_packet_len_p = write_qxfer_response (own_buf, data, n, 0);
|
|
|
|
free (data);
|
|
|
|
return;
|
|
}
|
|
|
|
if (strncmp ("qXfer:features:read:", own_buf, 20) == 0)
|
|
{
|
|
CORE_ADDR ofs;
|
|
unsigned int len, total_len;
|
|
const char *document;
|
|
char *annex;
|
|
|
|
require_running (own_buf);
|
|
|
|
/* Grab the annex, offset, and length. */
|
|
if (decode_xfer_read (own_buf + 20, &annex, &ofs, &len) < 0)
|
|
{
|
|
strcpy (own_buf, "E00");
|
|
return;
|
|
}
|
|
|
|
/* Now grab the correct annex. */
|
|
document = get_features_xml (annex);
|
|
if (document == NULL)
|
|
{
|
|
strcpy (own_buf, "E00");
|
|
return;
|
|
}
|
|
|
|
total_len = strlen (document);
|
|
if (len > PBUFSIZ - 2)
|
|
len = PBUFSIZ - 2;
|
|
|
|
if (ofs > total_len)
|
|
write_enn (own_buf);
|
|
else if (len < total_len - ofs)
|
|
*new_packet_len_p = write_qxfer_response (own_buf, document + ofs,
|
|
len, 1);
|
|
else
|
|
*new_packet_len_p = write_qxfer_response (own_buf, document + ofs,
|
|
total_len - ofs, 0);
|
|
|
|
return;
|
|
}
|
|
|
|
if (strncmp ("qXfer:libraries:read:", own_buf, 21) == 0)
|
|
{
|
|
CORE_ADDR ofs;
|
|
unsigned int len, total_len;
|
|
char *document, *p;
|
|
struct inferior_list_entry *dll_ptr;
|
|
char *annex;
|
|
|
|
require_running (own_buf);
|
|
|
|
/* Reject any annex; grab the offset and length. */
|
|
if (decode_xfer_read (own_buf + 21, &annex, &ofs, &len) < 0
|
|
|| annex[0] != '\0')
|
|
{
|
|
strcpy (own_buf, "E00");
|
|
return;
|
|
}
|
|
|
|
/* Over-estimate the necessary memory. Assume that every character
|
|
in the library name must be escaped. */
|
|
total_len = 64;
|
|
for (dll_ptr = all_dlls.head; dll_ptr != NULL; dll_ptr = dll_ptr->next)
|
|
total_len += 128 + 6 * strlen (((struct dll_info *) dll_ptr)->name);
|
|
|
|
document = malloc (total_len);
|
|
strcpy (document, "<library-list>\n");
|
|
p = document + strlen (document);
|
|
|
|
for (dll_ptr = all_dlls.head; dll_ptr != NULL; dll_ptr = dll_ptr->next)
|
|
{
|
|
struct dll_info *dll = (struct dll_info *) dll_ptr;
|
|
char *name;
|
|
|
|
strcpy (p, " <library name=\"");
|
|
p = p + strlen (p);
|
|
name = xml_escape_text (dll->name);
|
|
strcpy (p, name);
|
|
free (name);
|
|
p = p + strlen (p);
|
|
strcpy (p, "\"><segment address=\"");
|
|
p = p + strlen (p);
|
|
sprintf (p, "0x%lx", (long) dll->base_addr);
|
|
p = p + strlen (p);
|
|
strcpy (p, "\"/></library>\n");
|
|
p = p + strlen (p);
|
|
}
|
|
|
|
strcpy (p, "</library-list>\n");
|
|
|
|
total_len = strlen (document);
|
|
if (len > PBUFSIZ - 2)
|
|
len = PBUFSIZ - 2;
|
|
|
|
if (ofs > total_len)
|
|
write_enn (own_buf);
|
|
else if (len < total_len - ofs)
|
|
*new_packet_len_p = write_qxfer_response (own_buf, document + ofs,
|
|
len, 1);
|
|
else
|
|
*new_packet_len_p = write_qxfer_response (own_buf, document + ofs,
|
|
total_len - ofs, 0);
|
|
|
|
free (document);
|
|
return;
|
|
}
|
|
|
|
/* Protocol features query. */
|
|
if (strncmp ("qSupported", own_buf, 10) == 0
|
|
&& (own_buf[10] == ':' || own_buf[10] == '\0'))
|
|
{
|
|
sprintf (own_buf, "PacketSize=%x;QPassSignals+", PBUFSIZ - 1);
|
|
|
|
/* We do not have any hook to indicate whether the target backend
|
|
supports qXfer:libraries:read, so always report it. */
|
|
strcat (own_buf, ";qXfer:libraries:read+");
|
|
|
|
if (the_target->read_auxv != NULL)
|
|
strcat (own_buf, ";qXfer:auxv:read+");
|
|
|
|
if (the_target->qxfer_spu != NULL)
|
|
strcat (own_buf, ";qXfer:spu:read+;qXfer:spu:write+");
|
|
|
|
/* We always report qXfer:features:read, as targets may
|
|
install XML files on a subsequent call to arch_setup.
|
|
If we reported to GDB on startup that we don't support
|
|
qXfer:feature:read at all, we will never be re-queried. */
|
|
strcat (own_buf, ";qXfer:features:read+");
|
|
|
|
if (transport_is_reliable)
|
|
strcat (own_buf, ";QStartNoAckMode+");
|
|
return;
|
|
}
|
|
|
|
/* Thread-local storage support. */
|
|
if (the_target->get_tls_address != NULL
|
|
&& strncmp ("qGetTLSAddr:", own_buf, 12) == 0)
|
|
{
|
|
char *p = own_buf + 12;
|
|
CORE_ADDR parts[3], address = 0;
|
|
int i, err;
|
|
|
|
require_running (own_buf);
|
|
|
|
for (i = 0; i < 3; i++)
|
|
{
|
|
char *p2;
|
|
int len;
|
|
|
|
if (p == NULL)
|
|
break;
|
|
|
|
p2 = strchr (p, ',');
|
|
if (p2)
|
|
{
|
|
len = p2 - p;
|
|
p2++;
|
|
}
|
|
else
|
|
{
|
|
len = strlen (p);
|
|
p2 = NULL;
|
|
}
|
|
|
|
decode_address (&parts[i], p, len);
|
|
p = p2;
|
|
}
|
|
|
|
if (p != NULL || i < 3)
|
|
err = 1;
|
|
else
|
|
{
|
|
struct thread_info *thread = gdb_id_to_thread (parts[0]);
|
|
|
|
if (thread == NULL)
|
|
err = 2;
|
|
else
|
|
err = the_target->get_tls_address (thread, parts[1], parts[2],
|
|
&address);
|
|
}
|
|
|
|
if (err == 0)
|
|
{
|
|
sprintf (own_buf, "%llx", address);
|
|
return;
|
|
}
|
|
else if (err > 0)
|
|
{
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
|
|
/* Otherwise, pretend we do not understand this packet. */
|
|
}
|
|
|
|
/* Handle "monitor" commands. */
|
|
if (strncmp ("qRcmd,", own_buf, 6) == 0)
|
|
{
|
|
char *mon = malloc (PBUFSIZ);
|
|
int len = strlen (own_buf + 6);
|
|
|
|
if ((len % 2) != 0 || unhexify (mon, own_buf + 6, len / 2) != len / 2)
|
|
{
|
|
write_enn (own_buf);
|
|
free (mon);
|
|
return;
|
|
}
|
|
mon[len / 2] = '\0';
|
|
|
|
write_ok (own_buf);
|
|
|
|
if (strcmp (mon, "set debug 1") == 0)
|
|
{
|
|
debug_threads = 1;
|
|
monitor_output ("Debug output enabled.\n");
|
|
}
|
|
else if (strcmp (mon, "set debug 0") == 0)
|
|
{
|
|
debug_threads = 0;
|
|
monitor_output ("Debug output disabled.\n");
|
|
}
|
|
else if (strcmp (mon, "set remote-debug 1") == 0)
|
|
{
|
|
remote_debug = 1;
|
|
monitor_output ("Protocol debug output enabled.\n");
|
|
}
|
|
else if (strcmp (mon, "set remote-debug 0") == 0)
|
|
{
|
|
remote_debug = 0;
|
|
monitor_output ("Protocol debug output disabled.\n");
|
|
}
|
|
else if (strcmp (mon, "help") == 0)
|
|
monitor_show_help ();
|
|
else if (strcmp (mon, "exit") == 0)
|
|
exit_requested = 1;
|
|
else
|
|
{
|
|
monitor_output ("Unknown monitor command.\n\n");
|
|
monitor_show_help ();
|
|
write_enn (own_buf);
|
|
}
|
|
|
|
free (mon);
|
|
return;
|
|
}
|
|
|
|
if (strncmp ("qSearch:memory:", own_buf, sizeof ("qSearch:memory:") - 1) == 0)
|
|
{
|
|
require_running (own_buf);
|
|
handle_search_memory (own_buf, packet_len);
|
|
return;
|
|
}
|
|
|
|
/* Otherwise we didn't know what packet it was. Say we didn't
|
|
understand it. */
|
|
own_buf[0] = 0;
|
|
}
|
|
|
|
/* Parse vCont packets. */
|
|
void
|
|
handle_v_cont (char *own_buf, char *status, int *signal)
|
|
{
|
|
char *p, *q;
|
|
int n = 0, i = 0;
|
|
struct thread_resume *resume_info, default_action;
|
|
|
|
/* Count the number of semicolons in the packet. There should be one
|
|
for every action. */
|
|
p = &own_buf[5];
|
|
while (p)
|
|
{
|
|
n++;
|
|
p++;
|
|
p = strchr (p, ';');
|
|
}
|
|
/* Allocate room for one extra action, for the default remain-stopped
|
|
behavior; if no default action is in the list, we'll need the extra
|
|
slot. */
|
|
resume_info = malloc ((n + 1) * sizeof (resume_info[0]));
|
|
|
|
default_action.thread = -1;
|
|
default_action.leave_stopped = 1;
|
|
default_action.step = 0;
|
|
default_action.sig = 0;
|
|
|
|
p = &own_buf[5];
|
|
i = 0;
|
|
while (*p)
|
|
{
|
|
p++;
|
|
|
|
resume_info[i].leave_stopped = 0;
|
|
|
|
if (p[0] == 's' || p[0] == 'S')
|
|
resume_info[i].step = 1;
|
|
else if (p[0] == 'c' || p[0] == 'C')
|
|
resume_info[i].step = 0;
|
|
else
|
|
goto err;
|
|
|
|
if (p[0] == 'S' || p[0] == 'C')
|
|
{
|
|
int sig;
|
|
sig = strtol (p + 1, &q, 16);
|
|
if (p == q)
|
|
goto err;
|
|
p = q;
|
|
|
|
if (!target_signal_to_host_p (sig))
|
|
goto err;
|
|
resume_info[i].sig = target_signal_to_host (sig);
|
|
}
|
|
else
|
|
{
|
|
resume_info[i].sig = 0;
|
|
p = p + 1;
|
|
}
|
|
|
|
if (p[0] == 0)
|
|
{
|
|
resume_info[i].thread = -1;
|
|
default_action = resume_info[i];
|
|
|
|
/* Note: we don't increment i here, we'll overwrite this entry
|
|
the next time through. */
|
|
}
|
|
else if (p[0] == ':')
|
|
{
|
|
unsigned int gdb_id = strtoul (p + 1, &q, 16);
|
|
unsigned long thread_id;
|
|
|
|
if (p == q)
|
|
goto err;
|
|
p = q;
|
|
if (p[0] != ';' && p[0] != 0)
|
|
goto err;
|
|
|
|
thread_id = gdb_id_to_thread_id (gdb_id);
|
|
if (thread_id)
|
|
resume_info[i].thread = thread_id;
|
|
else
|
|
goto err;
|
|
|
|
i++;
|
|
}
|
|
}
|
|
|
|
resume_info[i] = default_action;
|
|
|
|
/* Still used in occasional places in the backend. */
|
|
if (n == 1 && resume_info[0].thread != -1)
|
|
cont_thread = resume_info[0].thread;
|
|
else
|
|
cont_thread = -1;
|
|
set_desired_inferior (0);
|
|
|
|
enable_async_io ();
|
|
(*the_target->resume) (resume_info);
|
|
|
|
free (resume_info);
|
|
|
|
*signal = mywait (status, 1);
|
|
prepare_resume_reply (own_buf, *status, *signal);
|
|
disable_async_io ();
|
|
return;
|
|
|
|
err:
|
|
write_enn (own_buf);
|
|
free (resume_info);
|
|
return;
|
|
}
|
|
|
|
/* Attach to a new program. Return 1 if successful, 0 if failure. */
|
|
int
|
|
handle_v_attach (char *own_buf, char *status, int *signal)
|
|
{
|
|
int pid;
|
|
|
|
pid = strtol (own_buf + 8, NULL, 16);
|
|
if (pid != 0 && attach_inferior (pid, status, signal) == 0)
|
|
{
|
|
/* Don't report shared library events after attaching, even if
|
|
some libraries are preloaded. GDB will always poll the
|
|
library list. Avoids the "stopped by shared library event"
|
|
notice on the GDB side. */
|
|
dlls_changed = 0;
|
|
prepare_resume_reply (own_buf, *status, *signal);
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
write_enn (own_buf);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Run a new program. Return 1 if successful, 0 if failure. */
|
|
static int
|
|
handle_v_run (char *own_buf, char *status, int *signal)
|
|
{
|
|
char *p, **pp, *next_p, **new_argv;
|
|
int i, new_argc;
|
|
|
|
new_argc = 0;
|
|
for (p = own_buf + strlen ("vRun;"); p && *p; p = strchr (p, ';'))
|
|
{
|
|
p++;
|
|
new_argc++;
|
|
}
|
|
|
|
new_argv = malloc ((new_argc + 2) * sizeof (char *));
|
|
i = 0;
|
|
for (p = own_buf + strlen ("vRun;"); *p; p = next_p)
|
|
{
|
|
next_p = strchr (p, ';');
|
|
if (next_p == NULL)
|
|
next_p = p + strlen (p);
|
|
|
|
if (i == 0 && p == next_p)
|
|
new_argv[i] = NULL;
|
|
else
|
|
{
|
|
new_argv[i] = malloc (1 + (next_p - p) / 2);
|
|
unhexify (new_argv[i], p, (next_p - p) / 2);
|
|
new_argv[i][(next_p - p) / 2] = '\0';
|
|
}
|
|
|
|
if (*next_p)
|
|
next_p++;
|
|
i++;
|
|
}
|
|
new_argv[i] = NULL;
|
|
|
|
if (new_argv[0] == NULL)
|
|
{
|
|
if (program_argv == NULL)
|
|
{
|
|
write_enn (own_buf);
|
|
return 0;
|
|
}
|
|
|
|
new_argv[0] = strdup (program_argv[0]);
|
|
}
|
|
|
|
/* Free the old argv. */
|
|
if (program_argv)
|
|
{
|
|
for (pp = program_argv; *pp != NULL; pp++)
|
|
free (*pp);
|
|
free (program_argv);
|
|
}
|
|
program_argv = new_argv;
|
|
|
|
*signal = start_inferior (program_argv, status);
|
|
if (*status == 'T')
|
|
{
|
|
prepare_resume_reply (own_buf, *status, *signal);
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
write_enn (own_buf);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Handle all of the extended 'v' packets. */
|
|
void
|
|
handle_v_requests (char *own_buf, char *status, int *signal,
|
|
int packet_len, int *new_packet_len)
|
|
{
|
|
if (!disable_packet_vCont)
|
|
{
|
|
if (strncmp (own_buf, "vCont;", 6) == 0)
|
|
{
|
|
require_running (own_buf);
|
|
handle_v_cont (own_buf, status, signal);
|
|
return;
|
|
}
|
|
|
|
if (strncmp (own_buf, "vCont?", 6) == 0)
|
|
{
|
|
strcpy (own_buf, "vCont;c;C;s;S");
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (strncmp (own_buf, "vFile:", 6) == 0
|
|
&& handle_vFile (own_buf, packet_len, new_packet_len))
|
|
return;
|
|
|
|
if (strncmp (own_buf, "vAttach;", 8) == 0)
|
|
{
|
|
if (target_running ())
|
|
{
|
|
fprintf (stderr, "Already debugging a process\n");
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
handle_v_attach (own_buf, status, signal);
|
|
return;
|
|
}
|
|
|
|
if (strncmp (own_buf, "vRun;", 5) == 0)
|
|
{
|
|
if (target_running ())
|
|
{
|
|
fprintf (stderr, "Already debugging a process\n");
|
|
write_enn (own_buf);
|
|
return;
|
|
}
|
|
handle_v_run (own_buf, status, signal);
|
|
return;
|
|
}
|
|
|
|
/* Otherwise we didn't know what packet it was. Say we didn't
|
|
understand it. */
|
|
own_buf[0] = 0;
|
|
return;
|
|
}
|
|
|
|
void
|
|
myresume (char *own_buf, int step, int *signalp, char *statusp)
|
|
{
|
|
struct thread_resume resume_info[2];
|
|
int n = 0;
|
|
int sig = *signalp;
|
|
|
|
set_desired_inferior (0);
|
|
|
|
if (step || sig || (cont_thread != 0 && cont_thread != -1))
|
|
{
|
|
resume_info[0].thread
|
|
= ((struct inferior_list_entry *) current_inferior)->id;
|
|
resume_info[0].step = step;
|
|
resume_info[0].sig = sig;
|
|
resume_info[0].leave_stopped = 0;
|
|
n++;
|
|
}
|
|
resume_info[n].thread = -1;
|
|
resume_info[n].step = 0;
|
|
resume_info[n].sig = 0;
|
|
resume_info[n].leave_stopped = (cont_thread != 0 && cont_thread != -1);
|
|
|
|
enable_async_io ();
|
|
(*the_target->resume) (resume_info);
|
|
*signalp = mywait (statusp, 1);
|
|
prepare_resume_reply (own_buf, *statusp, *signalp);
|
|
disable_async_io ();
|
|
}
|
|
|
|
static void
|
|
gdbserver_version (void)
|
|
{
|
|
printf ("GNU gdbserver %s%s\n"
|
|
"Copyright (C) 2007 Free Software Foundation, Inc.\n"
|
|
"gdbserver is free software, covered by the GNU General Public License.\n"
|
|
"This gdbserver was configured as \"%s\"\n",
|
|
PKGVERSION, version, host_name);
|
|
}
|
|
|
|
static void
|
|
gdbserver_usage (FILE *stream)
|
|
{
|
|
fprintf (stream, "Usage:\tgdbserver [OPTIONS] COMM PROG [ARGS ...]\n"
|
|
"\tgdbserver [OPTIONS] --attach COMM PID\n"
|
|
"\tgdbserver [OPTIONS] --multi COMM\n"
|
|
"\n"
|
|
"COMM may either be a tty device (for serial debugging), or \n"
|
|
"HOST:PORT to listen for a TCP connection.\n"
|
|
"\n"
|
|
"Options:\n"
|
|
" --debug\t\tEnable debugging output.\n"
|
|
" --version\t\tDisplay version information and exit.\n"
|
|
" --wrapper WRAPPER --\tRun WRAPPER to start new programs.\n");
|
|
if (REPORT_BUGS_TO[0] && stream == stdout)
|
|
fprintf (stream, "Report bugs to \"%s\".\n", REPORT_BUGS_TO);
|
|
}
|
|
|
|
static void
|
|
gdbserver_show_disableable (FILE *stream)
|
|
{
|
|
fprintf (stream, "Disableable packets:\n"
|
|
" vCont \tAll vCont packets\n"
|
|
" qC \tQuerying the current thread\n"
|
|
" qfThreadInfo\tThread listing\n"
|
|
" Tthread \tPassing the thread specifier in the T stop reply packet\n"
|
|
" threads \tAll of the above\n");
|
|
}
|
|
|
|
|
|
#undef require_running
|
|
#define require_running(BUF) \
|
|
if (!target_running ()) \
|
|
{ \
|
|
write_enn (BUF); \
|
|
break; \
|
|
}
|
|
|
|
int
|
|
main (int argc, char *argv[])
|
|
{
|
|
char ch, status, *own_buf;
|
|
unsigned char *mem_buf;
|
|
int i = 0;
|
|
int signal;
|
|
unsigned int len;
|
|
CORE_ADDR mem_addr;
|
|
int bad_attach;
|
|
int pid;
|
|
char *arg_end, *port;
|
|
char **next_arg = &argv[1];
|
|
int multi_mode = 0;
|
|
int attach = 0;
|
|
int was_running;
|
|
|
|
while (*next_arg != NULL && **next_arg == '-')
|
|
{
|
|
if (strcmp (*next_arg, "--version") == 0)
|
|
{
|
|
gdbserver_version ();
|
|
exit (0);
|
|
}
|
|
else if (strcmp (*next_arg, "--help") == 0)
|
|
{
|
|
gdbserver_usage (stdout);
|
|
exit (0);
|
|
}
|
|
else if (strcmp (*next_arg, "--attach") == 0)
|
|
attach = 1;
|
|
else if (strcmp (*next_arg, "--multi") == 0)
|
|
multi_mode = 1;
|
|
else if (strcmp (*next_arg, "--wrapper") == 0)
|
|
{
|
|
next_arg++;
|
|
|
|
wrapper_argv = next_arg;
|
|
while (*next_arg != NULL && strcmp (*next_arg, "--") != 0)
|
|
next_arg++;
|
|
|
|
if (next_arg == wrapper_argv || *next_arg == NULL)
|
|
{
|
|
gdbserver_usage (stderr);
|
|
exit (1);
|
|
}
|
|
|
|
/* Consume the "--". */
|
|
*next_arg = NULL;
|
|
}
|
|
else if (strcmp (*next_arg, "--debug") == 0)
|
|
debug_threads = 1;
|
|
else if (strcmp (*next_arg, "--disable-packet") == 0)
|
|
{
|
|
gdbserver_show_disableable (stdout);
|
|
exit (0);
|
|
}
|
|
else if (strncmp (*next_arg,
|
|
"--disable-packet=",
|
|
sizeof ("--disable-packet=") - 1) == 0)
|
|
{
|
|
char *packets, *tok;
|
|
|
|
packets = *next_arg += sizeof ("--disable-packet=") - 1;
|
|
for (tok = strtok (packets, ",");
|
|
tok != NULL;
|
|
tok = strtok (NULL, ","))
|
|
{
|
|
if (strcmp ("vCont", tok) == 0)
|
|
disable_packet_vCont = 1;
|
|
else if (strcmp ("Tthread", tok) == 0)
|
|
disable_packet_Tthread = 1;
|
|
else if (strcmp ("qC", tok) == 0)
|
|
disable_packet_qC = 1;
|
|
else if (strcmp ("qfThreadInfo", tok) == 0)
|
|
disable_packet_qfThreadInfo = 1;
|
|
else if (strcmp ("threads", tok) == 0)
|
|
{
|
|
disable_packet_vCont = 1;
|
|
disable_packet_Tthread = 1;
|
|
disable_packet_qC = 1;
|
|
disable_packet_qfThreadInfo = 1;
|
|
}
|
|
else
|
|
{
|
|
fprintf (stderr, "Don't know how to disable \"%s\".\n\n",
|
|
tok);
|
|
gdbserver_show_disableable (stderr);
|
|
exit (1);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
fprintf (stderr, "Unknown argument: %s\n", *next_arg);
|
|
exit (1);
|
|
}
|
|
|
|
next_arg++;
|
|
continue;
|
|
}
|
|
|
|
if (setjmp (toplevel))
|
|
{
|
|
fprintf (stderr, "Exiting\n");
|
|
exit (1);
|
|
}
|
|
|
|
port = *next_arg;
|
|
next_arg++;
|
|
if (port == NULL || (!attach && !multi_mode && *next_arg == NULL))
|
|
{
|
|
gdbserver_usage (stderr);
|
|
exit (1);
|
|
}
|
|
|
|
bad_attach = 0;
|
|
pid = 0;
|
|
|
|
/* --attach used to come after PORT, so allow it there for
|
|
compatibility. */
|
|
if (*next_arg != NULL && strcmp (*next_arg, "--attach") == 0)
|
|
{
|
|
attach = 1;
|
|
next_arg++;
|
|
}
|
|
|
|
if (attach
|
|
&& (*next_arg == NULL
|
|
|| (*next_arg)[0] == '\0'
|
|
|| (pid = strtoul (*next_arg, &arg_end, 0)) == 0
|
|
|| *arg_end != '\0'
|
|
|| next_arg[1] != NULL))
|
|
bad_attach = 1;
|
|
|
|
if (bad_attach)
|
|
{
|
|
gdbserver_usage (stderr);
|
|
exit (1);
|
|
}
|
|
|
|
initialize_async_io ();
|
|
initialize_low ();
|
|
|
|
own_buf = malloc (PBUFSIZ + 1);
|
|
mem_buf = malloc (PBUFSIZ);
|
|
|
|
if (pid == 0 && *next_arg != NULL)
|
|
{
|
|
int i, n;
|
|
|
|
n = argc - (next_arg - argv);
|
|
program_argv = malloc (sizeof (char *) * (n + 1));
|
|
for (i = 0; i < n; i++)
|
|
program_argv[i] = strdup (next_arg[i]);
|
|
program_argv[i] = NULL;
|
|
|
|
/* Wait till we are at first instruction in program. */
|
|
signal = start_inferior (program_argv, &status);
|
|
|
|
/* We are now (hopefully) stopped at the first instruction of
|
|
the target process. This assumes that the target process was
|
|
successfully created. */
|
|
}
|
|
else if (pid != 0)
|
|
{
|
|
if (attach_inferior (pid, &status, &signal) == -1)
|
|
error ("Attaching not supported on this target");
|
|
|
|
/* Otherwise succeeded. */
|
|
}
|
|
else
|
|
{
|
|
status = 'W';
|
|
signal = 0;
|
|
}
|
|
|
|
/* Don't report shared library events on the initial connection,
|
|
even if some libraries are preloaded. Avoids the "stopped by
|
|
shared library event" notice on gdb side. */
|
|
dlls_changed = 0;
|
|
|
|
if (setjmp (toplevel))
|
|
{
|
|
fprintf (stderr, "Killing inferior\n");
|
|
kill_inferior ();
|
|
exit (1);
|
|
}
|
|
|
|
if (status == 'W' || status == 'X')
|
|
was_running = 0;
|
|
else
|
|
was_running = 1;
|
|
|
|
if (!was_running && !multi_mode)
|
|
{
|
|
fprintf (stderr, "No program to debug. GDBserver exiting.\n");
|
|
exit (1);
|
|
}
|
|
|
|
while (1)
|
|
{
|
|
noack_mode = 0;
|
|
remote_open (port);
|
|
|
|
restart:
|
|
if (setjmp (toplevel) != 0)
|
|
{
|
|
/* An error occurred. */
|
|
if (response_needed)
|
|
{
|
|
write_enn (own_buf);
|
|
putpkt (own_buf);
|
|
}
|
|
}
|
|
|
|
disable_async_io ();
|
|
while (!exit_requested)
|
|
{
|
|
unsigned char sig;
|
|
int packet_len;
|
|
int new_packet_len = -1;
|
|
|
|
response_needed = 0;
|
|
packet_len = getpkt (own_buf);
|
|
if (packet_len <= 0)
|
|
break;
|
|
response_needed = 1;
|
|
|
|
i = 0;
|
|
ch = own_buf[i++];
|
|
switch (ch)
|
|
{
|
|
case 'q':
|
|
handle_query (own_buf, packet_len, &new_packet_len);
|
|
break;
|
|
case 'Q':
|
|
handle_general_set (own_buf);
|
|
break;
|
|
case 'D':
|
|
require_running (own_buf);
|
|
fprintf (stderr, "Detaching from inferior\n");
|
|
if (detach_inferior () != 0)
|
|
write_enn (own_buf);
|
|
else
|
|
{
|
|
write_ok (own_buf);
|
|
|
|
if (extended_protocol)
|
|
{
|
|
/* Treat this like a normal program exit. */
|
|
signal = 0;
|
|
status = 'W';
|
|
}
|
|
else
|
|
{
|
|
putpkt (own_buf);
|
|
remote_close ();
|
|
|
|
/* If we are attached, then we can exit. Otherwise, we
|
|
need to hang around doing nothing, until the child
|
|
is gone. */
|
|
if (!attached)
|
|
join_inferior ();
|
|
|
|
exit (0);
|
|
}
|
|
}
|
|
break;
|
|
case '!':
|
|
extended_protocol = 1;
|
|
write_ok (own_buf);
|
|
break;
|
|
case '?':
|
|
prepare_resume_reply (own_buf, status, signal);
|
|
break;
|
|
case 'H':
|
|
if (own_buf[1] == 'c' || own_buf[1] == 'g' || own_buf[1] == 's')
|
|
{
|
|
unsigned long gdb_id, thread_id;
|
|
|
|
require_running (own_buf);
|
|
gdb_id = strtoul (&own_buf[2], NULL, 16);
|
|
if (gdb_id == 0 || gdb_id == -1)
|
|
thread_id = gdb_id;
|
|
else
|
|
{
|
|
thread_id = gdb_id_to_thread_id (gdb_id);
|
|
if (thread_id == 0)
|
|
{
|
|
write_enn (own_buf);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (own_buf[1] == 'g')
|
|
{
|
|
general_thread = thread_id;
|
|
set_desired_inferior (1);
|
|
}
|
|
else if (own_buf[1] == 'c')
|
|
cont_thread = thread_id;
|
|
else if (own_buf[1] == 's')
|
|
step_thread = thread_id;
|
|
|
|
write_ok (own_buf);
|
|
}
|
|
else
|
|
{
|
|
/* Silently ignore it so that gdb can extend the protocol
|
|
without compatibility headaches. */
|
|
own_buf[0] = '\0';
|
|
}
|
|
break;
|
|
case 'g':
|
|
require_running (own_buf);
|
|
set_desired_inferior (1);
|
|
registers_to_string (own_buf);
|
|
break;
|
|
case 'G':
|
|
require_running (own_buf);
|
|
set_desired_inferior (1);
|
|
registers_from_string (&own_buf[1]);
|
|
write_ok (own_buf);
|
|
break;
|
|
case 'm':
|
|
require_running (own_buf);
|
|
decode_m_packet (&own_buf[1], &mem_addr, &len);
|
|
if (read_inferior_memory (mem_addr, mem_buf, len) == 0)
|
|
convert_int_to_ascii (mem_buf, own_buf, len);
|
|
else
|
|
write_enn (own_buf);
|
|
break;
|
|
case 'M':
|
|
require_running (own_buf);
|
|
decode_M_packet (&own_buf[1], &mem_addr, &len, mem_buf);
|
|
if (write_inferior_memory (mem_addr, mem_buf, len) == 0)
|
|
write_ok (own_buf);
|
|
else
|
|
write_enn (own_buf);
|
|
break;
|
|
case 'X':
|
|
require_running (own_buf);
|
|
if (decode_X_packet (&own_buf[1], packet_len - 1,
|
|
&mem_addr, &len, mem_buf) < 0
|
|
|| write_inferior_memory (mem_addr, mem_buf, len) != 0)
|
|
write_enn (own_buf);
|
|
else
|
|
write_ok (own_buf);
|
|
break;
|
|
case 'C':
|
|
require_running (own_buf);
|
|
convert_ascii_to_int (own_buf + 1, &sig, 1);
|
|
if (target_signal_to_host_p (sig))
|
|
signal = target_signal_to_host (sig);
|
|
else
|
|
signal = 0;
|
|
myresume (own_buf, 0, &signal, &status);
|
|
break;
|
|
case 'S':
|
|
require_running (own_buf);
|
|
convert_ascii_to_int (own_buf + 1, &sig, 1);
|
|
if (target_signal_to_host_p (sig))
|
|
signal = target_signal_to_host (sig);
|
|
else
|
|
signal = 0;
|
|
myresume (own_buf, 1, &signal, &status);
|
|
break;
|
|
case 'c':
|
|
require_running (own_buf);
|
|
signal = 0;
|
|
myresume (own_buf, 0, &signal, &status);
|
|
break;
|
|
case 's':
|
|
require_running (own_buf);
|
|
signal = 0;
|
|
myresume (own_buf, 1, &signal, &status);
|
|
break;
|
|
case 'Z':
|
|
{
|
|
char *lenptr;
|
|
char *dataptr;
|
|
CORE_ADDR addr = strtoul (&own_buf[3], &lenptr, 16);
|
|
int len = strtol (lenptr + 1, &dataptr, 16);
|
|
char type = own_buf[1];
|
|
|
|
if (the_target->insert_watchpoint == NULL
|
|
|| (type < '2' || type > '4'))
|
|
{
|
|
/* No watchpoint support or not a watchpoint command;
|
|
unrecognized either way. */
|
|
own_buf[0] = '\0';
|
|
}
|
|
else
|
|
{
|
|
int res;
|
|
|
|
require_running (own_buf);
|
|
res = (*the_target->insert_watchpoint) (type, addr, len);
|
|
if (res == 0)
|
|
write_ok (own_buf);
|
|
else if (res == 1)
|
|
/* Unsupported. */
|
|
own_buf[0] = '\0';
|
|
else
|
|
write_enn (own_buf);
|
|
}
|
|
break;
|
|
}
|
|
case 'z':
|
|
{
|
|
char *lenptr;
|
|
char *dataptr;
|
|
CORE_ADDR addr = strtoul (&own_buf[3], &lenptr, 16);
|
|
int len = strtol (lenptr + 1, &dataptr, 16);
|
|
char type = own_buf[1];
|
|
|
|
if (the_target->remove_watchpoint == NULL
|
|
|| (type < '2' || type > '4'))
|
|
{
|
|
/* No watchpoint support or not a watchpoint command;
|
|
unrecognized either way. */
|
|
own_buf[0] = '\0';
|
|
}
|
|
else
|
|
{
|
|
int res;
|
|
|
|
require_running (own_buf);
|
|
res = (*the_target->remove_watchpoint) (type, addr, len);
|
|
if (res == 0)
|
|
write_ok (own_buf);
|
|
else if (res == 1)
|
|
/* Unsupported. */
|
|
own_buf[0] = '\0';
|
|
else
|
|
write_enn (own_buf);
|
|
}
|
|
break;
|
|
}
|
|
case 'k':
|
|
response_needed = 0;
|
|
if (!target_running ())
|
|
/* The packet we received doesn't make sense - but we
|
|
can't reply to it, either. */
|
|
goto restart;
|
|
|
|
fprintf (stderr, "Killing inferior\n");
|
|
kill_inferior ();
|
|
|
|
/* When using the extended protocol, we wait with no
|
|
program running. The traditional protocol will exit
|
|
instead. */
|
|
if (extended_protocol)
|
|
{
|
|
status = 'X';
|
|
signal = TARGET_SIGNAL_KILL;
|
|
was_running = 0;
|
|
goto restart;
|
|
}
|
|
else
|
|
{
|
|
exit (0);
|
|
break;
|
|
}
|
|
case 'T':
|
|
{
|
|
unsigned long gdb_id, thread_id;
|
|
|
|
require_running (own_buf);
|
|
gdb_id = strtoul (&own_buf[1], NULL, 16);
|
|
thread_id = gdb_id_to_thread_id (gdb_id);
|
|
if (thread_id == 0)
|
|
{
|
|
write_enn (own_buf);
|
|
break;
|
|
}
|
|
|
|
if (mythread_alive (thread_id))
|
|
write_ok (own_buf);
|
|
else
|
|
write_enn (own_buf);
|
|
}
|
|
break;
|
|
case 'R':
|
|
response_needed = 0;
|
|
|
|
/* Restarting the inferior is only supported in the
|
|
extended protocol. */
|
|
if (extended_protocol)
|
|
{
|
|
if (target_running ())
|
|
kill_inferior ();
|
|
fprintf (stderr, "GDBserver restarting\n");
|
|
|
|
/* Wait till we are at 1st instruction in prog. */
|
|
if (program_argv != NULL)
|
|
signal = start_inferior (program_argv, &status);
|
|
else
|
|
{
|
|
status = 'X';
|
|
signal = TARGET_SIGNAL_KILL;
|
|
}
|
|
goto restart;
|
|
}
|
|
else
|
|
{
|
|
/* It is a request we don't understand. Respond with an
|
|
empty packet so that gdb knows that we don't support this
|
|
request. */
|
|
own_buf[0] = '\0';
|
|
break;
|
|
}
|
|
case 'v':
|
|
/* Extended (long) request. */
|
|
handle_v_requests (own_buf, &status, &signal,
|
|
packet_len, &new_packet_len);
|
|
break;
|
|
|
|
default:
|
|
/* It is a request we don't understand. Respond with an
|
|
empty packet so that gdb knows that we don't support this
|
|
request. */
|
|
own_buf[0] = '\0';
|
|
break;
|
|
}
|
|
|
|
if (new_packet_len != -1)
|
|
putpkt_binary (own_buf, new_packet_len);
|
|
else
|
|
putpkt (own_buf);
|
|
|
|
response_needed = 0;
|
|
|
|
if (was_running && (status == 'W' || status == 'X'))
|
|
{
|
|
was_running = 0;
|
|
|
|
if (status == 'W')
|
|
fprintf (stderr,
|
|
"\nChild exited with status %d\n", signal);
|
|
if (status == 'X')
|
|
fprintf (stderr, "\nChild terminated with signal = 0x%x (%s)\n",
|
|
target_signal_to_host (signal),
|
|
target_signal_to_name (signal));
|
|
|
|
if (extended_protocol)
|
|
goto restart;
|
|
else
|
|
{
|
|
fprintf (stderr, "GDBserver exiting\n");
|
|
exit (0);
|
|
}
|
|
}
|
|
|
|
if (status != 'W' && status != 'X')
|
|
was_running = 1;
|
|
}
|
|
|
|
/* If an exit was requested (using the "monitor exit" command),
|
|
terminate now. The only other way to get here is for
|
|
getpkt to fail; close the connection and reopen it at the
|
|
top of the loop. */
|
|
|
|
if (exit_requested)
|
|
{
|
|
remote_close ();
|
|
if (attached && target_running ())
|
|
detach_inferior ();
|
|
else if (target_running ())
|
|
kill_inferior ();
|
|
exit (0);
|
|
}
|
|
else
|
|
{
|
|
fprintf (stderr, "Remote side has terminated connection. "
|
|
"GDBserver will reopen the connection.\n");
|
|
remote_close ();
|
|
}
|
|
}
|
|
}
|