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. We 7 * provide the "standard" names as synonyms of the corresponding GCC 8 * 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#else 14/* llvm builtin functions that eBPF C program may use to 15 * emit BPF_LD_ABS and BPF_LD_IND instructions 16 */ 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#endif 21 22#endif 23 24