59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
#ifndef __BPF_FUNCS__
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#define __BPF_FUNCS__
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/* Misc macros. */
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#ifndef __maybe_unused
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# define __maybe_unused __attribute__ ((__unused__))
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#endif
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#ifndef __section
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# define __section(NAME) __attribute__((section(NAME), used))
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#endif
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#ifndef offsetof
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# define offsetof __builtin_offsetof
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#endif
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#ifndef htons
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# define htons(x) __constant_htons((x))
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#endif
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#ifndef likely
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# define likely(x) __builtin_expect(!!(x), 1)
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#endif
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#ifndef unlikely
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# define unlikely(x) __builtin_expect(!!(x), 0)
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#endif
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/* The verifier will translate them to actual function calls. */
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static void *(*bpf_map_lookup_elem)(void *map, void *key) __maybe_unused =
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(void *) BPF_FUNC_map_lookup_elem;
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static int (*bpf_map_update_elem)(void *map, void *key, void *value,
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unsigned long long flags) __maybe_unused =
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(void *) BPF_FUNC_map_update_elem;
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static int (*bpf_map_delete_elem)(void *map, void *key) __maybe_unused =
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(void *) BPF_FUNC_map_delete_elem;
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static unsigned int (*get_smp_processor_id)(void) __maybe_unused =
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(void *) BPF_FUNC_get_smp_processor_id;
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static unsigned int (*get_prandom_u32)(void) __maybe_unused =
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(void *) BPF_FUNC_get_prandom_u32;
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/* LLVM built-in functions that an eBPF C program may use to emit
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* BPF_LD_ABS and BPF_LD_IND instructions.
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*/
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unsigned long long load_byte(void *skb, unsigned long long off)
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asm ("llvm.bpf.load.byte");
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unsigned long long load_half(void *skb, unsigned long long off)
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asm ("llvm.bpf.load.half");
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unsigned long long load_word(void *skb, unsigned long long off)
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asm ("llvm.bpf.load.word");
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#endif /* __BPF_FUNCS__ */
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