5.1.1 .bss
Assemble the following statements onto the end of the
.bss
(uninitialized data) section.
Note: You cannot reserve all of data memory for symbols; you will
need room for the stack. See 11.8 Stack Allocation.
Example
; The following symbols (B1 and B2) will be placed in
; the uninitialized data section.
.bss
B1: .space 4 ; 4 bytes reserved for B1
B2: .space 1 ; 1 byte reserved for B2