Region		Address		Notes
text		0x00400000		contains only instructions; read-only; cannot expand
data		0x10000000		data objects; readable/writeable; can be expanded
stack		0x7fffefff		grows from that address; readable/writeable
k_text		0x80000000		kernel code; read-only; only accessible kernel mode
k_data		0x90000000		kernel data; read/write; only accessible kernel mode

Note: there is no heap like there is in C, but the data segment can expand.