diff --git a/tools/gdb/error.c b/tools/gdb/error.c
new file mode 100644
index 0000000..aea2901
--- /dev/null
+++ b/tools/gdb/error.c
@@ -0,0 +1,58 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include "error.h"
+
+char *pname;
+
+void
+Warning(char *fmt, ...)
+{
+    va_list args;
+
+    fprintf(stderr, "%s: WARNING: ", pname);
+
+    va_start(args, fmt);
+    vfprintf(stderr, fmt, args);
+    va_end(args);
+
+    fprintf(stderr, "\n");
+}
+
+void
+Error(char *fmt, ...)
+{
+    va_list args;
+
+    fprintf(stderr, "%s: ERROR: ", pname);
+
+    va_start(args, fmt);
+    vfprintf(stderr, fmt, args);
+    va_end(args);
+
+    fprintf(stderr, "\n");
+
+    exit(1);
+}
+
+void
+Perror(char *fmt, ...)
+{
+    va_list args;
+    int e = errno;
+    char *p;
+
+    fprintf(stderr, "%s: ERROR: ", pname);
+
+    va_start(args, fmt);
+    vfprintf(stderr, fmt, args);
+    va_end(args);
+
+    if ((p = strerror(e)) == NULL || *p == '\0')
+	fprintf(stderr, ": Unknown Error (%d)\n", e);
+    else
+	fprintf(stderr, ": %s\n", p);
+
+    exit(1);
+}