Merge pull request #1313 from thomaseichinger/cortexm_crash

cpu:cortex_common: add core_panic function

cpu/cortexm_common/crash.c

@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2014 INRIA
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser General
+ * Public License v2.1. See the file LICENSE in the top level directory for more
+ * details.
+ */
+
+/**
+ * @ingroup  core_util
+ * @{
+ *
+ * @file        crash.c
+ * @brief       Crash handling functions implementation for ARM Cortex-based MCUs
+ *
+ * @author      Oliver Hahm <oliver.hahm@inria.fr>
+ */
+
+#include "cpu.h"
+#include "lpm.h"
+#include "crash.h"
+
+#include <string.h>
+#include <stdio.h>
+
+/* "public" variables holding the crash data */
+char panic_str[80];
+int panic_code;
+
+/* flag preventing "recursive crash printing loop" */
+static int crashed = 0;
+
+/* WARNING: this function NEVER returns! */
+NORETURN void core_panic(int crash_code, const char *message)
+{
+    /* copy panic datas to "public" global variables */
+    panic_code = crash_code;
+    strncpy(panic_str, message, 80);
+    /* print panic message to console (if possible) */
+    if (crashed == 0) {
+        crashed = 1;
+        puts("******** SYSTEM FAILURE ********\n");
+        puts(message);
+#if DEVELHELP
+        puts("******** RIOT HALTS HERE ********\n");
+#else
+        puts("******** RIOT WILL REBOOT ********\n");
+#endif
+        puts("\n\n");
+    }
+    /* disable watchdog and all possible sources of interrupts */
+    //TODO
+    dINT();
+#if DEVELHELP
+    /* enter infinite loop, into deepest possible sleep mode */
+    while (1) {
+        lpm_set(LPM_OFF);
+    }
+#else
+    /* DEVELHELP not set => reboot system */
+    (void) reboot(RB_AUTOBOOT);
+#endif
+
+    /* tell the compiler that we won't return from this function
+       (even if we actually won't even get here...) */
+    UNREACHABLE();
+}