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
`r12`	387, the syscall number
`r5`	int cmd
`r6`	union bpf_attr *attr
`r7`	unsigned int size
`r8`	struct bpf_common_attr *attr_common
`r9`	unsigned int size_common
`r3`	the return value

Then run brki r14,8 to enter the kernel.

Same syscall on other architectures