Add new system-gdbinit infrastructure

gdb/ChangeLog:

        * data-directory/Makefile.in (SYSTEM_GDBINIT_SRCDIR): New
        variable.
        (VPATH): Add SYSTEM_GDBINIT_SRCDIR.
        (SYSTEM_GDBINIT_DIR, SYSTEM_GDBINIT_INSTALL_DIR)
        (SYSTEM_GDBINIT_FILES): New variables.
        (all): Add stamp-system-gdbinit.
        (stamp-system-gdbinit): New rule.
        (clean-system-gdbinit, install-system-gdbinit)
        (uninstall-system-gdbinit): New rules.  Make them .PHONY.
        (install-only): Add dependency on install-system-gdbinit.
        (uninstall): Add dependency on uninstall-system-gdbinit.
        (clean): Add dependency on clean-system-gdbinit.
        * system-gdbinit/elinos.py: New file.
        * system-gdbinit/wrs-linux.py: New file.

2 files changed, 104 insertions, 0 deletions

diff --git a/gdb/system-gdbinit/elinos.py b/gdb/system-gdbinit/elinos.py
new file mode 100644
index 00000000000..08c5b0f173f
--- /dev/null
+++ b/gdb/system-gdbinit/elinos.py
@@ -0,0 +1,79 @@
+# Copyright (C) 2011-2013 Free Software Foundation, Inc.
+
+# 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/>.
+
+"""Configure GDB using the ELinOS environment."""
+
+import os
+import glob
+import gdb
+
+
+def warn(msg):
+    print "warning: %s" % msg
+
+
+def get_elinos_environment():
+    """Return the ELinOS environment.
+
+    If the ELinOS environment is properly set up, return a dictionary
+    which contains:
+      * The path to the ELinOS project at key 'project';
+      * The path to the ELinOS CDK at key 'cdk';
+      * The ELinOS target name at key 'target' (Eg. 'i486-linux');
+      * A list of Xenomai install prefixes (which could be empty, if
+        the ELinOS project does not include Xenomai) at key 'xenomai'.
+
+    If one of these cannot be found, it is then assumed that the ELinOS
+    environment is not properly set up. Return None in such a case,
+    and print a warning.
+    """
+    result = {}
+    for key in ("project", "cdk", "target"):
+        var = "ELINOS_" + key.upper()
+        if var in os.environ:
+            result[key] = os.environ[var]
+        else:
+            warn("%s not set" % var)
+            return None
+
+    result["xenomai"] = glob.glob(result["project"] + "/xenomai-[0-9.]*")
+    return result
+
+
+def elinos_init():
+    """Initialize debugger environment for ELinOS.
+
+    Let the debugger know where to find the ELinOS libraries on host. This
+    assumes that an ELinOS environment is properly set up. If not, abort
+    with a warning.
+    """
+    elinos_env = get_elinos_environment()
+
+    if elinos_env is None:
+        warn("ELinOS system libraries will not be loaded")
+    else:
+        solib_prefix = "%s/%s" % (elinos_env["cdk"], elinos_env["target"])
+
+        solib_dirs = []
+        for dir in elinos_env['xenomai']:
+            solib_dirs += ["%s/%s" % (dir, "xenomai-build/usr/realtime/lib")]
+        solib_dirs += ["%s/%s" % (solib_prefix, "lib")]
+
+        gdb.execute("set solib-absolute-prefix %s" % solib_prefix)
+        gdb.execute("set solib-search-path %s" % ":".join(solib_dirs))
+
+
+if __name__ == "__main__":
+    elinos_init()
diff --git a/gdb/system-gdbinit/wrs-linux.py b/gdb/system-gdbinit/wrs-linux.py
new file mode 100644
index 00000000000..5571e668eb3
--- /dev/null
+++ b/gdb/system-gdbinit/wrs-linux.py
@@ -0,0 +1,25 @@
+# Copyright (C) 2011-2013 Free Software Foundation, Inc.
+
+# 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/>.
+
+"""Configure GDB using the WRS/Linux environment."""
+
+import os
+
+if 'ENV_PREFIX' in os.environ:
+    gdb.execute('set sysroot %s' % os.environ['ENV_PREFIX'])
+
+else:
+    print "warning: ENV_PREFIX environment variable missing."
+    print "The debugger will probably be unable to find the correct system libraries"