Slide 1

Functions and saving registers

•Group 1: EBX, ESI, EDI, EBP

•Group 2: EAX, EDX, ECX

•

•// func.c

•void func()

•{

• // may use group 1 registers

// saves group 2 registers if uses values in them after // calling func2()

func2();

}

// func2.c

void func2()

{

// saves group 1 registers if it uses them

// freely uses group 2 registers

}