| Non-Confidential |  PDF version | ARM DUI0473M | ||
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| Home > Directives Reference > MAP | ||||
| Non-Confidential | PDF version | ARM DUI0473M | ||
| ||||
| Home > Directives Reference > MAP | ||||
The MAP directive sets the origin of a storage map to a specified address.
MAP {expr,}base-register
where:
expris a numeric or PC-relative expression:
If base-register is
not specified, expr evaluates
to the address where the storage map starts. The storage map location
counter is set to this address.
If expr is PC-relative,
you must have defined the label before you use it in the map. The
map requires the definition of the label during the first pass of the
assembler.
base-registerspecifies a register. If base-register is
specified, the address where the storage map starts is the sum of expr,
and the value in base-register at
runtime.
Use the MAP directive in combination
with the FIELD directive to describe a storage
map.
Specify base-register to
define register-relative labels. The base register becomes implicit
in all labels defined by following FIELD directives,
until the next MAP directive. The register-relative labels
can be used in load and store instructions.
The MAP directive can be used any number
of times to define multiple storage maps.
The storage-map location counter, {VAR}, is set
to the same address as that specified by the MAP directive. The {VAR} counter is set to zero before the first MAP directive is used.
^ is a synonym for MAP.
MAP 0,r9
MAP 0xff,r9| Non-Confidential | PDF version | ARM DUI0473M |
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