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| author |   James Hilliard <james.hilliard1@gmail.com> | 2022-12-01 12:09:39 -0700 |
|---|---|---|
| committer |   Andrii Nakryiko <andrii@kernel.org> | 2022-12-02 16:22:28 -0800 |
| commit | f16a7aa5c2be3134d3b72078b94f36d639552888 (patch) | |
| tree | a25aebdc0c1af08796502ae6290b7082155399a9 /tools/testing/selftests/bpf/bpf_legacy.h | |
| parent | bpf, docs: Correct the example of BPF_XOR (diff) | |
| download | wireguard-linux-f16a7aa5c2be3134d3b72078b94f36d639552888.tar.xz wireguard-linux-f16a7aa5c2be3134d3b72078b94f36d639552888.zip | |
selftests/bpf: Add GCC compatible builtins to bpf_legacy.h
The bpf_legacy.h header uses llvm specific load functions, add
GCC compatible variants as well to fix tests using these functions
under GCC.
Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20221201190939.3230513-1-james.hilliard1@gmail.com
Diffstat (limited to 'tools/testing/selftests/bpf/bpf_legacy.h')
| -rw-r--r-- | tools/testing/selftests/bpf/bpf_legacy.h | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/tools/testing/selftests/bpf/bpf_legacy.h b/tools/testing/selftests/bpf/bpf_legacy.h index 845209581440..bc4555a003a7 100644 --- a/tools/testing/selftests/bpf/bpf_legacy.h +++ b/tools/testing/selftests/bpf/bpf_legacy.h @@ -2,15 +2,22 @@ #ifndef __BPF_LEGACY__ #define __BPF_LEGACY__ +#if __GNUC__ && !__clang__ +/* Functions to emit BPF_LD_ABS and BPF_LD_IND instructions. We + * provide the "standard" names as synonyms of the corresponding GCC + * builtins. Note how the SKB argument is ignored. + */ +#define load_byte(skb, off) __builtin_bpf_load_byte(off) +#define load_half(skb, off) __builtin_bpf_load_half(off) +#define load_word(skb, off) __builtin_bpf_load_word(off) +#else /* llvm builtin functions that eBPF C program may use to * emit BPF_LD_ABS and BPF_LD_IND instructions */ -unsigned long long load_byte(void *skb, - unsigned long long off) asm("llvm.bpf.load.byte"); -unsigned long long load_half(void *skb, - unsigned long long off) asm("llvm.bpf.load.half"); -unsigned long long load_word(void *skb, - unsigned long long off) asm("llvm.bpf.load.word"); +unsigned long long load_byte(void *skb, unsigned long long off) asm("llvm.bpf.load.byte"); +unsigned long long load_half(void *skb, unsigned long long off) asm("llvm.bpf.load.half"); +unsigned long long load_word(void *skb, unsigned long long off) asm("llvm.bpf.load.word"); +#endif #endif |