import libosmocore msgb handling (and dependencies)

This is supposed to be replaced with upstream libosmocore, as soon as
that has a proper maintained embedded build (again).

firmware/libosmocore/source/backtrace.c

@@ -0,0 +1,92 @@
+/*
+ * (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * (C) 2012 by Harald Welte <laforge@gnumonks.org>
+ *
+ * All Rights Reserved
+ *
+ * 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 2 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+/*! \file backtrace.c
+ *  \brief Routines realted to generating call back traces
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <osmocom/core/utils.h>
+//#include <osmocom/core/logging.h>
+//#include "config.h"
+
+#ifdef HAVE_EXECINFO_H
+#include <execinfo.h>
+
+static void _osmo_backtrace(int use_printf, int subsys, int level)
+{
+	int i, nptrs;
+	void *buffer[100];
+	char **strings;
+
+	nptrs = backtrace(buffer, ARRAY_SIZE(buffer));
+	if (use_printf)
+		printf("backtrace() returned %d addresses\n", nptrs);
+	else
+		LOGP(subsys, level, "backtrace() returned %d addresses\n",
+		     nptrs);
+
+	strings = backtrace_symbols(buffer, nptrs);
+	if (!strings)
+		return;
+
+	for (i = 1; i < nptrs; i++) {
+		if (use_printf)
+			printf("%s\n", strings[i]);
+		else
+			LOGP(subsys, level, "\t%s\n", strings[i]);
+	}
+
+	free(strings);
+}
+
+/*! \brief Generate and print a call back-trace
+ *
+ * This function will generate a function call back-trace of the
+ * current process and print it to stdout. */
+void osmo_generate_backtrace(void)
+{
+	_osmo_backtrace(1, 0, 0);
+}
+
+/*! \brief Generate and log a call back-trace
+ *  \param[in] subsys Logging sub-system
+ *  \param[in] level Logging level
+ *
+ * This function will generate a function call back-trace of the
+ * current process and log it to the specified subsystem and
+ * level using the libosmocore logging subsystem */
+void osmo_log_backtrace(int subsys, int level)
+{
+	_osmo_backtrace(0, subsys, level);
+}
+#else
+void osmo_generate_backtrace(void)
+{
+	printf("This platform has no backtrace function\n");
+}
+void osmo_log_backtrace(int subsys, int level)
+{
+	//LOGP(subsys, level, "This platform has no backtrace function\n");
+}
+#endif