Linker

Creating a link map

To create a linker map file:

• Select your project in Project Explorer

• File->Properties

• In the left-hand panel, select:
  • C/C++ Build
    • Settings
• Then in the right-hand panel, select
  • MCU Linker
    • Miscellaneous
• Under the "Other options" add
  • -Map=link.map
• Now rebuild and you will have a complete linker map called link.map

Creating a symbolic load map

The objdump ('arm-none-eabi-objdump') utility is used create a load map. This is the information used to load the image into memory. To automatically create a load map every time you do a build:

• Select the project in the Project Explorer
• Right-click and select "Properties"
• Expand the "C/C++ Build" item
• Click on "Settings"
• Select the "Build steps" tab
• In the "Post-build steps" "Command" field, enter:

arm-none-eabi-objdump -h -S ${BuildArtifactFileName} >${BuildArtifactFileBaseName}.lss

• Click apply

Next time you do a build, this will now run and create you a linker map in a file called <projectname>.lss

Additional information

1. Within the pre- and post-build steps, you can enter multiple commands, separated by a ";". For example, to display the size of the target executable and get a link map, enter the following command To enable it, do the following: <pre> arm-none-eabi-size ${BuildArtifactFileName}; arm-none-eabi-objdump -h -S ${BuildArtifactFileName} >${BuildArtifactFileBaseName}.lss </pre>

2. To view the objdump documentation: To find the options you can use with objdump, see

Help->Help Contents

• Code Red Technologies Documentation
  • Tools Documentation
    • GNU Binary utilities