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Linker User Guide

Preface Overview of the Linker Linking Models Supported by armlink Image Structure and Generation Linker Optimization Features Getting Image Details Accessing and Managing Symbols with armlink Scatter-loading Features Scatter File Syntax BNF notation used in scatter-loading description s Syntax of a scatter file Load region descriptions Components of a load region description Syntax of a load region description Load region attributes Inheritance rules for load region address attribut Inheritance rules for the RELOC address attribute Considerations when using a relative address +offs Execution region descriptions Components of an execution region description Syntax of an execution region description Execution region attributes Inheritance rules for execution region address att Considerations when using a relative address +offs Input section descriptions Components of an input section description Syntax of an input section description Examples of module and input section specification Expression evaluation in scatter files Expression usage in scatter files Expression rules in scatter files Execution address built-in functions for use in sc ScatterAssert function and load address related fu Symbol related function in a scatter file AlignExpr(expr, align) function GetPageSize() function SizeOfHeaders() function Example of aligning a base address in execution sp Scatter files containing relative base address loa Linker Command-line Options Linker Steering File Command Reference Via File Syntax

Considerations when using a relative address +offset for execution regions

8.4.5 Considerations when using a relative address +offset for execution regions

There are some considerations to be aware of when using a relative address for execution regions.

When using +offset to specify an execution region base address:
  • The first execution region inherits the attributes of the parent load region, unless an attribute is explicitly set on that execution region.
  • A +offset execution region ER2 inherits the attributes of the execution region ER1 immediately before it, unless:
    • ER1 has the OVERLAY attribute.
    • ER2 has an explicit attribute set.
    If an execution region is unable to inherit an attribute, then it gets the attribute ABSOLUTE.
  • If the parent load region has the RELOC attribute, then all execution regions within that load region must have a +offset base address.
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