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Chapter 19. HPPA Dependent Features

19.5. HPPA Assembler Directives

as

for the HPPA supports many additional directives for compatibility with the native assembler. This

section describes them only briefly. For detailed information on HPPA specific assembler directives,

see [HP9000 Series 800 Assembly Language Reference Manual] (HP 92432 90001).

as

does not support the following assembler directives described in the HP manual:

.endm

.liston

.enter

.locct

.leave

.macro

.listoff

Beyond those implemented for compatibility,

as

supports one additional assembler directive for the

HPPA:

.param

. It conveys register argument locations for static functions. Its syntax closely follows

the

.export

directive.

These are the additional directives in

as

for the HPPA:

.block n

.blockz n

Reserve

n

bytes of storage, and initialize them to zero.

.call

Mark the beginning of a procedure call. Only the special case with no arguments is allowed.

.callinfo [ param=value, ... ] [ flag, ... ]

Specify a number of parameters and flags that define the environment for a procedure.

param

may be any of

frame

(frame size),

entry_gr

(end of general register range),

entry_fr

(end of float register range),

entry_sr

(end of space register range).

The values for

flag

are

calls

or

caller

(proc has subroutines),

no_calls

(proc does not

call subroutines),

save_rp

(preserve return pointer),

save_sp

(proc preserves stack pointer),

no_unwind

(do not unwind this proc),

hpux_int

(proc is interrupt routine).

.code

Assemble into the standard section called

$TEXT$

, subsection

$CODE$

.

.copyright "string"

In the SOM object format, insert

string

into the object code, marked as a copyright string.

.copyright "string"

In the ELF object format, insert

string

into the object code, marked as a version string.

.enter

Not yet supported; the assembler rejects programs containing this directive.

.entry

Mark the beginning of a procedure.

.exit

Mark the end of a procedure.