4.3 Assembler Internal Sections

These sections are meant only for the internal use of as . They have no meaning at run-time. You do not really need to know about these sections for most purposes; but they can be mentioned in as warning messages, so it might be helpful to have an idea of their meanings to as . These sections are used to permit the value of every expression in your assembly language program to be a section-relative address.

An internal assembler logic error has been found. This means there is a bug in the assembler.

expr section
The assembler stores complex expression internally as combinations of symbols. When it needs to represent an expression as a symbol, it puts it in the expr section.