$N, where N is a decimal number between 0 and 9 LABEL?, where LABEL is any legal symbol name.
Local labels thus defined may be redefined or automatically generated. The scope of a local label is based on when it may be undefined or reset. This happens when one of the following situations is encountered:
.newblock directive see .newblock The current section is changed (.sect, .text, or .data) Entering or leaving an included file The macro scope where the label was defined is exited