Linker User GuidePreface Overview of the Linker Linking Models Supported by armlink Image Structure and Generation The structure of an ARM ELF image Views of the image at each link stage Input sections, output sections, regions, and prog Load view and execution view of an image Methods of specifying an image memory map with the Image entry points Simple images Types of simple image Type 1 image structure, one load region and contig Type 2 image structure, one load region and non-co Type 3 image structure, multiple load regions and Section placement with the linker Default section placement Section placement with the FIRST and LAST attribut Section alignment with the linker Linker support for creating demand-paged files Linker reordering of execution regions containing Linker-generated veneers What is a veneer? Veneer sharing Veneer types Generation of position independent to absolute ven Reuse of veneers when scatter-loading Command-line options used to control the generatio Weak references and definitions How the linker performs library searching, selecti How the linker searches for the ARM standard libra Specifying user libraries when linking How the linker resolves references The strict family of linker options Linker Optimization Features Getting Image Details Accessing and Managing Symbols with armlink Scatter-loading Features Scatter File Syntax Linker Command-line Options Linker Steering File Command Reference Via File Syntax
Load view and execution view of an image
3.1.3 Load view and execution view of an image
Image regions are placed in the system memory map at load time. The location of the regions in memory might change during execution.
Before you can execute the image, you might have to move some of its regions to their execution addresses and create the ZI output sections. For example, initialized RW data might have to be copied from its load address in ROM to its execution address in RAM.
The memory map of an image has the following distinct views:
The following figure shows these views for an image without an execute-only (XO) section:
Figure 3-2 Load and execution memory maps for an image without an XO section
The following figure shows load and execution views for an image with an XO section:
Figure 3-3 Load and execution memory maps for an image with an XO section
The following table compares the load and execution views:
Table 3-1 Comparing load and execution views
of your data.