lkml.org 
[lkml]   [2022]   [Dec]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH] selftests/bpf: add GCC compatible builtins to bpf_legacy.h
On Thu, Dec 1, 2022 at 11:10 AM James Hilliard
<james.hilliard1@gmail.com> wrote:
>
> 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>
> Cc: Jose E. Marchesi <jose.marchesi@oracle.com>
> Cc: David Faust <david.faust@oracle.com>
> ---

Please use [PATCH bpf-next] prefix to target patches for bpf-next
tree. This helps some of our automation.

> tools/testing/selftests/bpf/bpf_legacy.h | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/tools/testing/selftests/bpf/bpf_legacy.h b/tools/testing/selftests/bpf/bpf_legacy.h
> index 845209581440..256c2a90aa20 100644
> --- a/tools/testing/selftests/bpf/bpf_legacy.h
> +++ b/tools/testing/selftests/bpf/bpf_legacy.h
> @@ -2,6 +2,15 @@
> #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))

added space between skb, and off. And we don't need those extra ()
around off, right? I stripped them away, but let me know if that's
wrong.

> +#else
> /* llvm builtin functions that eBPF C program may use to
> * emit BPF_LD_ABS and BPF_LD_IND instructions
> */
> @@ -11,6 +20,7 @@ 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
>
> --
> 2.34.1
>

\
 
 \ /
  Last update: 2022-12-03 01:24    [W:0.940 / U:0.076 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site