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Linker User Guide
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Overview of the linker
Linking models supported by armlink
Image structure and generation
The image structure
Input sections, output sections, regions, and Prog
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Types of simple image
Type 1 image, one load region and contiguous execu
Type 2 image, one load region and non-contiguous e
Type 3 image, two load regions and non-contiguous
Image entry points
About specifying an initial entry point
Section placement with the linker
Placing sections with FIRST and LAST attributes
Section alignment with the linker
Demand paging
About ordering execution regions containing Thumb
Overview of veneers
Veneer sharing
Veneer types
Generation of position independent to absolute ven
Reuse of veneers when scatter-loading
Using command-line options to control the generati
About weak references and definitions
How the linker performs library searching, selecti
Controlling how the linker searches for the ARM st
Specifying user libraries when linking
How the linker resolves references
Use of the strict family of options in the linker
Using linker optimizations
Getting information about images
Accessing and managing symbols with armlink
Using scatter files
Linker User Guide
Reuse of veneers when scatter-loading
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| Home > Image structure and generation > Reuse of veneers when scatter-loading | |||
The linker reuses veneers whenever possible, but there are some limitations on the reuse of veneers in protected load regions and overlaid execution regions.
A scatter file enables you to create regions that share the same area of RAM:
If you use the
PROTECTEDkeyword for a load region it prevents:overlapping of load regions
veneer sharing
string sharing with the
--mergeoption.
If you use the
OVERLAYkeyword for a region, no other execution region can reuse a veneer placed in an overlay execution region.
If it is not possible to reuse a veneer, new veneers are created instead. Unless you have instructed the linker to place veneers somewhere specific using scatter-loading, a veneer is always placed in the execution region that contains the call requiring the veneer.
See also| Copyright © 2007-2008, 2011-2012 ARM. All rights reserved. | ARM DUI 0377D |
| Non-Confidential | ID062912 |
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| Home > Image structure and generation > Reuse of veneers when scatter-loading |
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