Embedded Linux notes

1. executable file format in Linux: Elf (executable and linking format, executable and connection format)

2. xip (execute-in-place): embedded systems can directly address memory devices such as ROM and flash memory, just like Ram, so they can run directly.Program. This can save Memory RAM, but may cause system performance degradation.

3. Differences between real-time and Standard Operating Systems:
1. predicted response time (10 microseconds and milliseconds)
2. schedulability (precise time-based scheduling)
3. Stability under high load: ability to identify signal priorities in a timely manner and process important signals