Software Development

Flashcards for reviewing embedded systems software development concepts.

steps of development the code goes through

compilation, linking, debugging/simulation and execution

ELF (Executable and Linking Format)

Stores compiled code and data, works for relocatable code

DWARF2 (Debug With Arbitrary Record Format)

Holds debug information, such as variable names and line numbers. used for symbolic debugging

ROM

Read-only memory used for permanent code storage.

RAM

Random access memory used for changing data.

how does start up work in embedded systems

ROM is filled with program data, RAM is empty

Execution starts from address 0×0

Initialization routine sets up RAM

Main function runs

the purpose of scatterloading

to control exactly where each part of the code and data go in memory

Load Regions

Defines where data/code is stored at power-on. ROM

whats a debug table

enables symbolic source code debugging, providing a:

link between the source line and the current PC on the target

links between variable names in the source code and target registers

what is fromelf tool for

to convert ELF to a binary format

what is code memory area used for

instructions of the program

what is initialized data memory area used for

variables with predefined values

what is Zero-initialized data memory area used for

variables that start as 0

What is heap memory area used for

dynamic variables

what is stack memory area used for

used for function calls and local variables