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X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 4ZfUMvvMfaeowhJr6j5I5vbRF7MevFtGwbOoM1sM/R8zsSnVczyabJ6yqhWg8GZDHH6icuPOALk0PjUajnAmVg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR10MB4385 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-02_04,2024-09-02_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 suspectscore=0 mlxscore=0 spamscore=0 adultscore=0 phishscore=0 bulkscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2407110000 definitions=main-2409020119 X-Proofpoint-ORIG-GUID: yVjehODG7ZjcDI41eIqpzYfYCS7jvxLN X-Proofpoint-GUID: yVjehODG7ZjcDI41eIqpzYfYCS7jvxLN On 02/09/2024 15:08, Arnaldo Carvalho de Melo wrote: > On Fri, Aug 30, 2024 at 11:34:40PM +0100, Alan Maguire wrote: >> On 30/08/2024 23:20, Andrii Nakryiko wrote: >>> On Fri, Aug 30, 2024 at 1:49 PM Arnaldo Carvalho de Melo wrote: >>>> On Fri, Aug 30, 2024 at 08:56:08AM -0700, Andrii Nakryiko wrote: >>>> +++ b/lib/bpf >>>> @@ -1 +1 @@ >>>> -Subproject commit 6597330c45d185381900037f0130712cd326ae59 >>>> +Subproject commit 686f600bca59e107af4040d0838ca2b02c14ff50 >>>> ⬢[acme@toolbox pahole]$ > >>>> Right? > >>> Yes, and I'm doing another Github sync today. > > So, I just commited this locally: > > ⬢[acme@toolbox pahole]$ git show > commit 5fd558301891d1c0456fcae79798a789b499c1f9 (HEAD -> master) > Author: Arnaldo Carvalho de Melo > Date: Mon Sep 2 11:05:06 2024 -0300 > > libbpf: Sync with master, i.e. what will become 1.5.0 > > To pick this distilled BPF fix: > > fe28fae57a9463fbf ("libbpf: Ensure new BTF objects inherit input endianness") > > Signed-off-by: Arnaldo Carvalho de Melo > > diff --git a/lib/bpf b/lib/bpf > index 686f600bca59e107..caa17bdcbfc58e68 160000 > --- a/lib/bpf > +++ b/lib/bpf > @@ -1 +1 @@ > -Subproject commit 686f600bca59e107af4040d0838ca2b02c14ff50 > +Subproject commit caa17bdcbfc58e68eaf4d017c058e6577606bf56 > ⬢[acme@toolbox pahole]$ > > Ack? > Acked-by: Alan Maguire My patch for the same change crossed with your email [1], just ignore it. Thanks! Alan [1] https://lore.kernel.org/dwarves/20240902141043.177815-1-alan.maguire@oracle.com/T/#u >>> Separate question, I think pahole supports the shared library version >>> of libbpf, as an option, is that right? How do you guys handle missing >>> APIs for distilled BTF in such a case? > >> Good question - at present the distill-related code is conditionally >> compiled if LIBBPF_MAJOR_VERSION >=1 and LIBBF_MINOR_VERSION >= 5; so if >> an older shared library libbpf+headers is used, the btf_feature is >> simply ignored as if we didn't know about it. See [1] for the relevant >> code in btf_encoder.c. This problem doesn't arise if we're using the >> synced libbpf. > >> There might be a better way to handle this, but I think that's enough to >> ensure we avoid compilation failures at least. > > I guess this is good enough, > > - Arnaldo > >> [1] >> https://github.com/acmel/dwarves/blob/fd14dc67cb6aaead553074afb4a1ddad10209892/btf_encoder.c#L1766