To print the map to output.map with LD: LDFLAGS += -Wl,-Map=output.mapĪs an example for a simple program, you would link the compilation units using those commands: Using GNU binutils, the generation of the map file must be explicitly requested by setting the right flag.

To get started, make sure you generate the map file as part of your build. I will try to illustrate with some examples, all described with GNU binutils. Into it to see how simple it is and how you can effectively use it. The map file is a symbol table for the whole program. This is one of the few artifacts I keep in my CD pipeline. I highly recommend keeping that file for any firmware running in production.

The map file provides valuable information that can help you understand and optimize memory. Yet, the answer sometimes lies in that particular file. Much they can teach you about the program you are working on.įirmware engineers rarely reach for the map file generated by their build In this article, I want to highlight how simple linker map files are and how

Intermapper how to crete sub map