Comments (2)
Secomp + bpf allows for further optimizations. For example, a few system calls, like ioctl
we intercept to check request
is one of the subset of requests we allow through. Bpf allows filtering rules based on arguments to system calls. So we would not need to ptrace ioctl
anymore, thus avoiding the context switch.
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We have a LD_PRELOAD we use for intercepting vdso
system calls in user space. I will close this and later we can gauge whether additional optimizations are needed.
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