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#### 6.60.12 BPF Built-in Functions

The following built-in functions are available for eBPF targets.

Built-in Function: unsigned long long __builtin_bpf_load_byte (unsigned long long offset)

  Load a byte from the `struct sk_buff` packet data pointed by the register `%r6` and return it.

Built-in Function: unsigned long long __builtin_bpf_load_half (unsigned long long offset)

  Load 16-bits from the `struct sk_buff` packet data pointed by the register `%r6` and return it.

Built-in Function: unsigned long long __builtin_bpf_load_word (unsigned long long offset)

  Load 32-bits from the `struct sk_buff` packet data pointed by the register `%r6` and return it.