bpf

perform a command on an extended BPF map or program

sys_bpf(int cmd, union bpf_attr *attr, unsigned int size, struct bpf_common_attr *attr_common, unsigned int size_common)

register	value
`rax`	321, the syscall number
`rdi`	int cmd
`rsi`	union bpf_attr *attr
`rdx`	unsigned int size
`r10`	struct bpf_common_attr *attr_common
`r8`	unsigned int size_common
`rax`	the return value

Then run syscall to enter the kernel.

Same syscall on other architectures