Kbuild: Handle longer symbols in kallsyms.c

Andi Kleen · michal42 · commit f3462aa952cf · 2013-11-06T22:25:49.000+01:00
Also warn for too long symbols

v2: Add missing newline. Use 255 max (Joe Perches)
Signed-off-by: Andi Kleen &lt;ak@linux.intel.com&gt;
Signed-off-by: Michal Marek &lt;mmarek@suse.cz&gt;
diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
@@ -27,7 +27,7 @@
 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0]))
 #endif
 
-#define KSYM_NAME_LEN		128
+#define KSYM_NAME_LEN		255
 
 struct sym_entry {
 	unsigned long long addr;
@@ -111,6 +111,12 @@ static int read_symbol(FILE *in, struct sym_entry *s)
 			fprintf(stderr, "Read error or end of file.\n");
 		return -1;
 	}
+	if (strlen(str) > KSYM_NAME_LEN) {
+		fprintf(stderr, "Symbol %s too long for kallsyms (%lu vs %d).\n"
+                                "Please increase KSYM_NAME_LEN both in kernel and kallsyms.c\n",
+			str, strlen(str), KSYM_NAME_LEN);
+		return -1;
+	}
 
 	sym = str;
 	/* skip prefix char */
