3 ms·

Yeah that should be really fast, still. Programs could also opt to just tell the OS "hey don't check this system call from me", on each system call, avoiding an

• saati 5y ago
  What would stop malware telling the os to not check it?
  • binarybanana 5y ago
    Nothing, but that only makes reading the malware's memory possible with these exploits. That malware won't be able to access memory of some other process, if that other process is using those flags itself. Edit: For that to work that flag would have to work on the context switch level. So every time you switch away from a sensitive process, flush all buffers and whatever else, then switch. This also requires the kernel itself to enable mitigations as necessary when it touches encryption keys before switching back to user space.
  • staticassertion 5y ago
    That assumes that the malware can already have arbitrary control over system calls, at which point spectre isn't the issue.