Linux Core - Memory Layout

32Bits CPU Memory Layout

Uninitialized global, static variables, filled with zeros.

Initialized global, static variables initialized by the programmer.

A.k.a ELF, stores the binary image of the process.

functions to change program break position. a typical usage: brk v.s. sbrk

32bits CPU addressing v.s. 64 bits CPU addressing

type	max addressing	size
32bits	0x00000000 ~ 0xFFFFFFFF	$2^{32} = 4 G B$
64bits	0x00000000 ~ 0xFFFFFFFFFFFFFFFF	$2^{64} = 16 E i B$