What are the start-up code steps?

Answer:

Start-up code for C programs usually consists of the following actions, performed in the order described:

• Disable all interrupts.
• Copy any initialized data from ROM to RAM.
• Zero the uninitialized data area.
• Allocate space for and initialize the stack.
• Initialize the processor’s stack pointer.
• Create and initialize the heap.
• Enable interrupts.
• Call main.