1 /* Target operations for the remote server for GDB.
2 Copyright (C) 2002-2015 Free Software Foundation, Inc.
4 Contributed by MontaVista Software.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "tracepoint.h"
24 struct target_ops
*the_target
;
27 set_desired_thread (int use_general
)
29 struct thread_info
*found
;
32 found
= find_thread_ptid (general_thread
);
34 found
= find_thread_ptid (cont_thread
);
36 current_thread
= found
;
37 return (current_thread
!= NULL
);
41 read_inferior_memory (CORE_ADDR memaddr
, unsigned char *myaddr
, int len
)
44 res
= (*the_target
->read_memory
) (memaddr
, myaddr
, len
);
45 check_mem_read (memaddr
, myaddr
, len
);
49 /* See target/target.h. */
52 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
54 return read_inferior_memory (memaddr
, myaddr
, len
);
57 /* See target/target.h. */
60 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
62 return read_inferior_memory (memaddr
, (gdb_byte
*) result
, sizeof (*result
));
66 write_inferior_memory (CORE_ADDR memaddr
, const unsigned char *myaddr
,
69 /* Lacking cleanups, there is some potential for a memory leak if the
70 write fails and we go through error(). Make sure that no more than
71 one buffer is ever pending by making BUFFER static. */
72 static unsigned char *buffer
= 0;
78 buffer
= (unsigned char *) xmalloc (len
);
79 memcpy (buffer
, myaddr
, len
);
80 check_mem_write (memaddr
, buffer
, myaddr
, len
);
81 res
= (*the_target
->write_memory
) (memaddr
, buffer
, len
);
88 /* See target/target.h. */
91 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
93 return write_inferior_memory (memaddr
, myaddr
, len
);
97 mywait (ptid_t ptid
, struct target_waitstatus
*ourstatus
, int options
,
105 ret
= (*the_target
->wait
) (ptid
, ourstatus
, options
);
107 /* We don't expose _LOADED events to gdbserver core. See the
108 `dlls_changed' global. */
109 if (ourstatus
->kind
== TARGET_WAITKIND_LOADED
)
110 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
112 /* If GDB is connected through TCP/serial, then GDBserver will most
113 probably be running on its own terminal/console, so it's nice to
114 print there why is GDBserver exiting. If however, GDB is
115 connected through stdio, then there's no need to spam the GDB
116 console with this -- the user will already see the exit through
117 regular GDB output, in that same terminal. */
118 if (!remote_connection_is_stdio ())
120 if (ourstatus
->kind
== TARGET_WAITKIND_EXITED
)
122 "\nChild exited with status %d\n", ourstatus
->value
.integer
);
123 else if (ourstatus
->kind
== TARGET_WAITKIND_SIGNALLED
)
124 fprintf (stderr
, "\nChild terminated with signal = 0x%x (%s)\n",
125 gdb_signal_to_host (ourstatus
->value
.sig
),
126 gdb_signal_to_name (ourstatus
->value
.sig
));
135 /* See target/target.h. */
138 target_stop_and_wait (ptid_t ptid
)
140 struct target_waitstatus status
;
141 int was_non_stop
= non_stop
;
142 struct thread_resume resume_info
;
144 resume_info
.thread
= ptid
;
145 resume_info
.kind
= resume_stop
;
146 resume_info
.sig
= GDB_SIGNAL_0
;
147 (*the_target
->resume
) (&resume_info
, 1);
150 mywait (ptid
, &status
, 0, 0);
151 non_stop
= was_non_stop
;
154 /* See target/target.h. */
157 target_continue_no_signal (ptid_t ptid
)
159 struct thread_resume resume_info
;
161 resume_info
.thread
= ptid
;
162 resume_info
.kind
= resume_continue
;
163 resume_info
.sig
= GDB_SIGNAL_0
;
164 (*the_target
->resume
) (&resume_info
, 1);
168 start_non_stop (int nonstop
)
170 if (the_target
->start_non_stop
== NULL
)
178 return (*the_target
->start_non_stop
) (nonstop
);
182 set_target_ops (struct target_ops
*target
)
184 the_target
= XNEW (struct target_ops
);
185 memcpy (the_target
, target
, sizeof (*the_target
));
188 /* Convert pid to printable format. */
191 target_pid_to_str (ptid_t ptid
)
195 if (ptid_equal (ptid
, minus_one_ptid
))
196 xsnprintf (buf
, sizeof (buf
), "<all threads>");
197 else if (ptid_equal (ptid
, null_ptid
))
198 xsnprintf (buf
, sizeof (buf
), "<null thread>");
199 else if (ptid_get_tid (ptid
) != 0)
200 xsnprintf (buf
, sizeof (buf
), "Thread %d.0x%lx",
201 ptid_get_pid (ptid
), ptid_get_tid (ptid
));
202 else if (ptid_get_lwp (ptid
) != 0)
203 xsnprintf (buf
, sizeof (buf
), "LWP %d.%ld",
204 ptid_get_pid (ptid
), ptid_get_lwp (ptid
));
206 xsnprintf (buf
, sizeof (buf
), "Process %d",
207 ptid_get_pid (ptid
));
213 kill_inferior (int pid
)
215 gdb_agent_about_to_close (pid
);
217 return (*the_target
->kill
) (pid
);
220 /* Target can do hardware single step. */
223 target_can_do_hardware_single_step (void)
228 /* Default implementation for breakpoint_kind_for_pc.
230 The default behavior for targets that don't implement breakpoint_kind_for_pc
231 is to use the size of a breakpoint as the kind. */
234 default_breakpoint_kind_from_pc (CORE_ADDR
*pcptr
)
238 gdb_assert (the_target
->sw_breakpoint_from_kind
!= NULL
);
240 (*the_target
->sw_breakpoint_from_kind
) (0, &size
);