8.78. .size

This directive is used to set the size associated with a symbol.

8.78.1. COFF Version

For COFF targets, the .size directive is only permitted inside .def/.endef pairs. It is used like this:

.size expression

.size is only meaningful when generating COFF format output; when as is generating b.out, it accepts this directive but ignores it.

8.78.2. ELF Version

For ELF targets, the .size directive is used like this:

.size name , expression

This directive sets the size associated with a symbol name. The size in bytes is computed from expression which can make use of label arithmetic. This directive is typically used to set the size of function symbols.