Initial revision

kernel/misc.c

@@ -0,0 +1,74 @@
+/* This file contains a collection of miscellaneous procedures:
+ *   panic	    abort MINIX due to a fatal error
+ *   bad_assertion  for debugging
+ *   bad_compare    for debugging
+ * 
+ * Changes:
+ *   Oct 04, 2004   moved panic() to this file  (Jorrit N. Herder)
+ *   Sep 30, 2004   removed mem_init(), env_parse to lib  (Jorrit N. Herder)
+ */
+
+#include "kernel.h"
+#include "assert.h"
+#include <unistd.h>
+#include <minix/com.h>
+
+
+/*===========================================================================*
+ *                                   panic                                   *
+ *===========================================================================*/
+PUBLIC void panic(s,n)
+_CONST char *s;
+int n;
+{
+/* The system has run aground of a fatal error.  Terminate execution.
+ * If the panic originated in MM or FS, the string will be empty and the
+ * file system already syncked.  If the panic originates in the kernel, we are
+ * kind of stuck.
+ */
+  static int panicking = 0;
+  if (panicking ++)		/* prevent recursive panics */
+  	return;
+
+  if (s != NULL) {
+	kprintf("\nKernel panic: %s", karg(s));
+	if (n != NO_NUM) kprintf(" %d", n);
+	kprintf("\n",NO_ARG);
+  }
+  prepare_shutdown(RBT_PANIC);
+}
+
+
+#if !NDEBUG
+/*=========================================================================*
+ *				bad_assertion				   *
+ *=========================================================================*/
+PUBLIC void bad_assertion(file, line, what)
+char *file;
+int line;
+char *what;
+{
+  kprintf("panic at %s", karg(file));
+  kprintf(" (line %d): ", line);
+  kprintf("assertion \"%s\" failed.\n", karg(what));
+  panic(NULL, NO_NUM);
+}
+
+/*=========================================================================*
+ *				bad_compare				   *
+ *=========================================================================*/
+PUBLIC void bad_compare(file, line, lhs, what, rhs)
+char *file;
+int line;
+int lhs;
+char *what;
+int rhs;
+{
+  kprintf("panic at %s", karg(file));
+  kprintf(" (line %d): ", line);
+  kprintf("compare (%d)", lhs);
+  kprintf(" %s ", karg(what));
+  kprintf("(%d) failed.\n", rhs);
+  panic(NULL, NO_NUM);
+}
+#endif /* !NDEBUG */