functions are at fixed addresses, they make nice
targets for exploits that can control RIP.
- emulate [default] Vsyscalls turn into traps and are
- emulated reasonably safely.
+ emulate Vsyscalls turn into traps and are emulated
+ reasonably safely.
- native Vsyscalls are native syscall instructions.
+ native [default] Vsyscalls are native syscall
+ instructions.
This is a little bit faster than trapping
and makes a few dynamic recompilers work
better than they would in emulation mode.