added realloc

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1408 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

src/lib/malloc.c

@@ -46,6 +46,23 @@ void *malloc(size_t size)
 	return p;
 }
 
+void *realloc(void *mem, size_t size)
+{
+	void *new_mem;
+
+	if (mem == 0)
+		return malloc(size);
+	if (size == 0) {
+		free(mem);
+		return 0;
+	}
+
+	new_mem = malloc(size);
+	memcpy(new_mem, mem, size);
+	free(mem);
+	return new_mem;
+}
+
 void free(void *where)
 {
 	/* Don't care */