The memory space of each process is divided into several chunks. Those chunks are described for each architecture in the following sections.
| Begin | End | Description |
|---|
0x00000000 | 0x00001000 | Not mapped, for the NULL pointer |
0x00001000 | 0xc0000000 | Userspace (program image, stack, heap) |
0xc0000000 | end | Kernel space |
| Begin | End | Description |
|---|
0x0000000000000000 | 0x0000000000001000 | Not mapped, for the NULL pointer |
0x0000000000001000 | 0x0000800000000000 | Userspace (program image, stack, heap) |
0x0000800000000000 | 0xffff800000000000 | Canonical hole, cannot be used |
0xffff800000000000 | end | Kernel space |