Directives Reference
ARM DUI 0068B Copyright © 2000, 2001 ARM Limited. All r ights reserved. 7-57
7.7.6 EQU
The
EQU
directive gives a symbolic name to a numeric constant, a register-relative value
or a program-relative value.
*
is a synonym for
EQU
.
Syntax
name EQU expr{, type}
where:
name
is the symbolic name to assign to the value.
expr
is a register-relative address, a program-relative address, an absolute
address, or a 32-bit integer constant.
type
is optional.
type
can be any one of:
•
CODE16
•
CODE32
•
DATA
You can use
type
only if
expr
is an absolute address. If
name
is exported,
the
name
entry in the symbol table in the object file will be marked as
CODE16
,
CODE32
, or
DATA
, according to
type
. This can be used by the linker.
Usage
Use
EQU
to define constants. This is similar to the use of
#define
to define a constant in C.
See KEEP on page7-64 and E XPORT or GLOBAL on page 7-58 for information on
exporting symbol s.
Examples
abc EQU 2 ; assigns the value 2 to the symbol abc.
xyz EQU label+8 ; assigns the address (label+8) to the
; symbol xyz.
fiq EQU 0x1C, CODE32 ; assigns the absolute address 0x1C to
; the symbol fiq, and marks it as code