Cortex-M7 without hardware part 4: map
Part 1 explained the linker script. Part 2 explained the startup and the vector table. Part 3 built the ELF. Now we look at the artifact that quietly ties all of those together: the linker map file. If you ever wonder “did my vector table really end up at the flash base?” or “why is my .data empty?” or “what did –gc-sections remove?”, the map file is where the answers live. 1 ...