Reference Guide

68 Chapter 4
Assembler Directives and Pseudo-Operations
.CALLINFO Directive
CALLER or
CALLS Indicates that this procedure calls other routines, so it
requires space in the stack for a frame marker and a
fixed argument list. (When a program is assembled
using the -f option, this becomes the default case.)
The Assembler allocates stack space when it
encounters an .ENTER pseudo-operation and
deallocates this space when it encounters a .LEAVE
pseudo-operation. The Assembler allocates 48 bytes for
the PA-RISC 32-bit mode and 80 bytes for the PA-RISC
64-bit (2.0W) mode.
The frame marker and fixed argument list area occur
at the top of the stack so you must take this space into
account when locating local variables on the stack. You
must allocate an area (using FRAME=) for a variable
argument list when this area is needed.
CALLER does not imply the existence of the parameter
SAVE_RP.
The CALLER and CALLS parameters are equivalent.
NO_CALLS Indicates that the procedure does not call other
procedures and, therefore, does not require a frame
marker on the stack. This is the default case unless the
program is assembled using the -f option.
CLEANUP Indicates that this procedure requires cleanup during
unwind.
ENTRY_FR=
register Specifies the high end boundary of the Entry/Save
floating-point register partition. The partition includes
%fr12 through %fr15 for PA-RISC 1.0 and %fr12
through %fr21 for PA-RISC 1.1. The Assembler
automatically saves these registers when it encounters
an .ENTER pseudo-operation and restores them when it
encounters a .LEAVE pseudo-operation.
ENTRY_GR=
register Specifies the high end boundary of the Entry/Save
register partition. The partition may extend over
registers %r3 through %r18. If you omit this
parameter, no registers are saved.