24 lines · c
1/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */2#ifndef __BPF_LEGACY__3#define __BPF_LEGACY__4 5#if __GNUC__ && !__clang__6/* Functions to emit BPF_LD_ABS and BPF_LD_IND instructions. We7 * provide the "standard" names as synonyms of the corresponding GCC8 * builtins. Note how the SKB argument is ignored.9 */10#define load_byte(skb, off) __builtin_bpf_load_byte(off)11#define load_half(skb, off) __builtin_bpf_load_half(off)12#define load_word(skb, off) __builtin_bpf_load_word(off)13#else14/* llvm builtin functions that eBPF C program may use to15 * emit BPF_LD_ABS and BPF_LD_IND instructions16 */17unsigned long long load_byte(void *skb, unsigned long long off) asm("llvm.bpf.load.byte");18unsigned long long load_half(void *skb, unsigned long long off) asm("llvm.bpf.load.half");19unsigned long long load_word(void *skb, unsigned long long off) asm("llvm.bpf.load.word");20#endif21 22#endif23 24