| rax | 45 | sets the new programm break on the heap | 8 bit |
| rbx | *end | the new end/ break pointer of the data segment | 64/32 bit |
| On return | rax |
| address of the new break | |
| with rbx = 0 you get the actual end address of your data segment |
| Errorcode | c++ name | Description |
| - | - | no errors |