cpukit: Add libdebugger, a remote debugger agent for GDB.

cpukit/libdebugger/rtems-debugger-remote.c

@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2016 Chris Johns <chrisj@rtems.org>.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <errno.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <rtems/rtems-debugger.h>
+#include <rtems/debugger/rtems-debugger-server.h>
+#include <rtems/debugger/rtems-debugger-remote.h>
+
+static rtems_debugger_remote* remotes[4];
+
+int
+rtems_debugger_remote_register(rtems_debugger_remote* remote)
+{
+  size_t r;
+  if (remote->begin == NULL || remote->end == NULL ||
+      remote->connect == NULL || remote->disconnect == NULL ||
+      remote->isconnected == NULL ||
+      remote->read == NULL || remote->write == NULL) {
+    errno = EINVAL;
+    return -1;
+  }
+  for (r = 0; r < RTEMS_DEBUGGER_NUMOF(remotes); ++r) {
+    if (remotes[r] == NULL) {
+      remotes[r] = remote;
+      return 0;
+    }
+  }
+  errno = ENOSPC;
+  return -1;
+}
+
+rtems_debugger_remote*
+rtems_debugger_remote_find(const char* name)
+{
+  size_t r;
+  for (r = 0; r < RTEMS_DEBUGGER_NUMOF(remotes); ++r) {
+    if (remotes[r] != NULL) {
+      if (strcasecmp(name, remotes[r]->name) == 0)
+        return remotes[r];
+    }
+  }
+  return NULL;
+}