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/* Target operations for the remote server for GDB.
Copyright (C) 2002-2015 Free Software Foundation, Inc.
Contributed by MontaVista Software.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "server.h"
#include "tracepoint.h"
struct target_ops *the_target;
void
set_desired_thread (int use_general)
{
struct thread_info *found;
if (use_general == 1)
found = find_thread_ptid (general_thread);
else
found = find_thread_ptid (cont_thread);
if (found == NULL)
current_thread = get_first_thread ();
else
current_thread = found;
}
int
read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)
{
int res;
res = (*the_target->read_memory) (memaddr, myaddr, len);
check_mem_read (memaddr, myaddr, len);
return res;
}
/* See target/target.h. */
int
target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
{
return read_inferior_memory (memaddr, myaddr, len);
}
/* See target/target.h. */
int
target_read_uint32 (CORE_ADDR memaddr, uint32_t *result)
{
return read_inferior_memory (memaddr, (gdb_byte *) result, sizeof (*result));
}
int
write_inferior_memory (CORE_ADDR memaddr, const unsigned char *myaddr,
int len)
{
/* Lacking cleanups, there is some potential for a memory leak if the
write fails and we go through error(). Make sure that no more than
one buffer is ever pending by making BUFFER static. */
static unsigned char *buffer = 0;
int res;
if (buffer != NULL)
free (buffer);
buffer = xmalloc (len);
memcpy (buffer, myaddr, len);
check_mem_write (memaddr, buffer, myaddr, len);
res = (*the_target->write_memory) (memaddr, buffer, len);
free (buffer);
buffer = NULL;
return res;
}
/* See target/target.h. */
int
target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
{
return write_inferior_memory (memaddr, myaddr, len);
}
ptid_t
mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
int connected_wait)
{
ptid_t ret;
if (connected_wait)
server_waiting = 1;
ret = (*the_target->wait) (ptid, ourstatus, options);
/* We don't expose _LOADED events to gdbserver core. See the
`dlls_changed' global. */
if (ourstatus->kind == TARGET_WAITKIND_LOADED)
ourstatus->kind = TARGET_WAITKIND_STOPPED;
/* If GDB is connected through TCP/serial, then GDBserver will most
probably be running on its own terminal/console, so it's nice to
print there why is GDBserver exiting. If however, GDB is
connected through stdio, then there's no need to spam the GDB
console with this -- the user will already see the exit through
regular GDB output, in that same terminal. */
if (!remote_connection_is_stdio ())
{
if (ourstatus->kind == TARGET_WAITKIND_EXITED)
fprintf (stderr,
"\nChild exited with status %d\n", ourstatus->value.integer);
else if (ourstatus->kind == TARGET_WAITKIND_SIGNALLED)
fprintf (stderr, "\nChild terminated with signal = 0x%x (%s)\n",
gdb_signal_to_host (ourstatus->value.sig),
gdb_signal_to_name (ourstatus->value.sig));
}
if (connected_wait)
server_waiting = 0;
return ret;
}
/* See target/target.h. */
void
target_stop_and_wait (ptid_t ptid)
{
struct target_waitstatus status;
int was_non_stop = non_stop;
struct thread_resume resume_info;
resume_info.thread = ptid;
resume_info.kind = resume_stop;
resume_info.sig = GDB_SIGNAL_0;
(*the_target->resume) (&resume_info, 1);
non_stop = 1;
mywait (ptid, &status, 0, 0);
non_stop = was_non_stop;
}
/* See target/target.h. */
void
target_continue_no_signal (ptid_t ptid)
{
struct thread_resume resume_info;
resume_info.thread = ptid;
resume_info.kind = resume_continue;
resume_info.sig = GDB_SIGNAL_0;
(*the_target->resume) (&resume_info, 1);
}
int
start_non_stop (int nonstop)
{
if (the_target->start_non_stop == NULL)
{
if (nonstop)
return -1;
else
return 0;
}
return (*the_target->start_non_stop) (nonstop);
}
void
set_target_ops (struct target_ops *target)
{
the_target = (struct target_ops *) xmalloc (sizeof (*the_target));
memcpy (the_target, target, sizeof (*the_target));
}
/* Convert pid to printable format. */
const char *
target_pid_to_str (ptid_t ptid)
{
static char buf[80];
if (ptid_equal (ptid, minus_one_ptid))
xsnprintf (buf, sizeof (buf), "<all threads>");
else if (ptid_equal (ptid, null_ptid))
xsnprintf (buf, sizeof (buf), "<null thread>");
else if (ptid_get_tid (ptid) != 0)
xsnprintf (buf, sizeof (buf), "Thread %d.0x%lx",
ptid_get_pid (ptid), ptid_get_tid (ptid));
else if (ptid_get_lwp (ptid) != 0)
xsnprintf (buf, sizeof (buf), "LWP %d.%ld",
ptid_get_pid (ptid), ptid_get_lwp (ptid));
else
xsnprintf (buf, sizeof (buf), "Process %d",
ptid_get_pid (ptid));
return buf;
}
int
kill_inferior (int pid)
{
gdb_agent_about_to_close (pid);
return (*the_target->kill) (pid);
}
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