 RealView Linker and Utilities Guide | |
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RealView Linker and Utilities Guide
Preface Introduction The Linker Command Syntax Using the Basic Linker Functionality Specifying the image structure
Building blocks for objects and images Load view and execution view of an image Specifying an image memory map Image entry points Section placement Ordering input sections by attribute Using FIRST and LAST to place sections Aligning sections Ordering execution regions containing Thumb code Optimizations and modifications Common debug section elimination Common group or section elimination Unused section elimination Unused function elimination Linker feedback RW data compression PI to absolute veneers Veneer generation Reuse of veneers with overlay execution regions Branch inlining Using command-line options to create simple images Type 1, one load region and contiguous execution r Type 2, one load region and non contiguous executi Type 3, two load regions and non contiguous execut Using command-line options to handle C++ exception Getting information about images Using image-related information Accessing Image Symbols Using Scatter-loading Description Files Using the ARM Librarian Using fromelfReuse of veneers with overlay execution regions
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| Home > Using the Basic Linker Functionality > Optimizations and modifications > Reuse of veneers with overlay execution regions | |||
armlink reuses veneers whenever possible. However, both the following conditions are enforced on reuse:
an overlay execution region cannot reuse a veneer placed in any other overlay execution region
no other execution region can reuse a veneer placed in an overlay execution region.
If these conditions are not met, new veneers are created instead of reusing existing ones. 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. This implies that:
for an overlay execution region, all its veneers are included within the execution region
an overlay execution region never requires a veneer from another execution region.
| Copyright © 2007 ARM Limited. All rights reserved. | ARM DUI 0377A |
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