32bit

32 bit¶

Program Memory¶

When process switches in the CPU the memory gets unmapped and the new process gets remapped.

Linux Memory Map:

• Stack
  • Local Variables
  • Function Parameters
• Memory Mapping Segment
  • File mapping including dynamic libraries
• Heap
  • Runtime Memory allocation through malloc
• BSS Segment
  • Uninitialized static variables
• Data Segment
  • Variables Initialized by the programmer
• Text Segment
  • Elf file of the process

Windows Memory Map:

Stack¶

Sample Program:

int foobar(int a, int b, int c)
{
    int xx = a + 2;
    int yy = b + 3;
    int zz = c + 4;
    int sum = xx + yy + zz;

    return xx * yy * zz + sum;
}

int main()
{
    return foobar(77, 88, 99);
}