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 */ 17 unsigned long long load_byte(void *skb, unsigned long long off) asm("llvm.bpf.load.byte"); 18 unsigned long long load_half(void *skb, unsigned long long off) asm("llvm.bpf.load.half"); 19 unsigned long long load_word(void *skb, unsigned long long off) asm("llvm.bpf.load.word"); 20 #endif 21 22 #endif 23 24