136b5d471SAndrii Nakryiko /* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */ 236b5d471SAndrii Nakryiko #ifndef __BPF_LEGACY__ 336b5d471SAndrii Nakryiko #define __BPF_LEGACY__ 436b5d471SAndrii Nakryiko 5*f16a7aa5SJames Hilliard #if __GNUC__ && !__clang__ 6*f16a7aa5SJames Hilliard /* Functions to emit BPF_LD_ABS and BPF_LD_IND instructions. We 7*f16a7aa5SJames Hilliard * provide the "standard" names as synonyms of the corresponding GCC 8*f16a7aa5SJames Hilliard * builtins. Note how the SKB argument is ignored. 9*f16a7aa5SJames Hilliard */ 10*f16a7aa5SJames Hilliard #define load_byte(skb, off) __builtin_bpf_load_byte(off) 11*f16a7aa5SJames Hilliard #define load_half(skb, off) __builtin_bpf_load_half(off) 12*f16a7aa5SJames Hilliard #define load_word(skb, off) __builtin_bpf_load_word(off) 13*f16a7aa5SJames Hilliard #else 1436b5d471SAndrii Nakryiko /* llvm builtin functions that eBPF C program may use to 1536b5d471SAndrii Nakryiko * emit BPF_LD_ABS and BPF_LD_IND instructions 1636b5d471SAndrii Nakryiko */ 17*f16a7aa5SJames Hilliard unsigned long long load_byte(void *skb, unsigned long long off) asm("llvm.bpf.load.byte"); 18*f16a7aa5SJames Hilliard unsigned long long load_half(void *skb, unsigned long long off) asm("llvm.bpf.load.half"); 19*f16a7aa5SJames Hilliard unsigned long long load_word(void *skb, unsigned long long off) asm("llvm.bpf.load.word"); 20*f16a7aa5SJames Hilliard #endif 2136b5d471SAndrii Nakryiko 2236b5d471SAndrii Nakryiko #endif 2336b5d471SAndrii Nakryiko 24