Describe a stack frame. "frame-register" is the frame register,
"offset" is the distance from the frame register to the virtual
frame pointer, "return-pc-register" is the return program register.
You must use ".ent" before ".frame" and only one ".frame" can be
used per ".ent".
.mask "bitmask", "frameoffset"
Indicate which of the integer registers are saved in the current
function's stack frame, this is for the debugger to explain the
Set the beginning of the procedure "proc_name". Use this directive
when you want to generate information for the debugger.
Set the end of a procedure. Use this directive to generate information
for the debugger.
Switch the destination of following statements into the bss section,
which is used for data that is uninitialized anywhere.