C7.3.4 Inheritance rules for load region address attributes
A load region can inherit the attributes of a previous load region.
For a load region to inherit the attributes of a previous load region, specify a
+offset base address for that region. A load region
cannot inherit attributes if:
You explicitly set the attribute of that load region.
The load region immediately before has the OVERLAY attribute.
You can explicitly set a load region with the ABSOLUTE,
PI, RELOC, or OVERLAY address
attributes.
Note:
PI and RELOC are not
supported for AArch64 state.
The following inheritance rules apply when no address
attribute is specified:
The OVERLAY
attribute cannot be inherited. A region with the OVERLAY
attribute cannot inherit.
A base address load or execution region always
defaults to ABSOLUTE.
A +offset load region inherits the address attribute from the
previous load region or ABSOLUTE if no previous load
region exists.
Example
This example shows the inheritance rules for setting the address attributes of load
regions:
LR1 0x8000 PI
{
…
}
LR2 +0 ; LR2 inherits PI from LR1
{
…
}
LR3 0x1000 ; LR3 does not inherit because it has no relative base
address, gets default of ABSOLUTE
{
…
}
LR4 +0 ; LR4 inherits ABSOLUTE from LR3
{
…
}
LR5 +0 RELOC ; LR5 does not inherit because it explicitly sets RELOC
{
…
}
LR6 +0 OVERLAY ; LR6 does not inherit, an OVERLAY cannot inherit
{
…
}
LR7 +0 ; LR7 cannot inherit OVERLAY, gets default of ABSOLUTE
{
…
}
Arm’s Privacy Policy has been updated. By continuing to use our site, you consent to Arm’s Privacy Policy. Please review our Privacy Policy to learn more about our collection, use and transfers of your data.