 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 fromelfSpecifying an image memory map
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| Home > Using the Basic Linker Functionality > Specifying the image structure > Specifying an image memory map | |||
An image can consist of any number of regions and output sections. Any number of these regions can have different load and execution addresses. To construct the memory map of an image, armlink must have information about:
- Grouping
How input sections are grouped into output sections and regions.
- Placement
Where image regions are to be located in the memory maps.
Depending on the complexity of the memory maps of the image, there are two ways to pass this information to armlink:
- Using command‑line options
The following options can be used for simple cases where an image has only one or two load regions and up to three execution regions:
‑‑ro‑base‑‑rw‑base‑‑ropi‑‑rwpi‑‑split‑‑rosplit
The options listed above provide a simplified notation that gives the same settings as a scatter‑loading description for a simple image. For more information, see Using command-line options to create simple images.
- Using a scatter‑loading description file
A scatter‑loading description file is used for more complex cases where you require complete control over the grouping and placement of image components. To use scatter-loading, specify
‑‑scatterat the command‑line. This is described in full in Chapter 5 Using Scatter-loading Description Files.filename
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