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X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: 5a1bd1e2-61b3-42c0-b10b-08dcc8db4ab3 X-MS-Exchange-CrossTenant-AuthSource: BLAPR10MB5267.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Aug 2024 10:05:35.8085 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: ijiQlJ5CWImGcqSzfxTSYIqiLDIsEPyRRCQJmADj0tZ77TifCtliet8tQA3z1Bq5rX/FjywZg08r+hvSZ1CBJg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN6PR10MB7998 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-08-30_04,2024-08-30_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 mlxscore=0 mlxlogscore=999 phishscore=0 bulkscore=0 malwarescore=0 suspectscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2407110000 definitions=main-2408300075 X-Proofpoint-GUID: rTDzDT8a9U8hIhz2rqP9aN0ZcnE5Ah4E X-Proofpoint-ORIG-GUID: rTDzDT8a9U8hIhz2rqP9aN0ZcnE5Ah4E On 30/08/2024 10:21, Eduard Zingerman wrote: > On Fri, 2024-08-30 at 02:49 +0000, Song Liu wrote: > > [...] > >> Clarification: >> >> With the regression, _both_ .BTF and .BTF.base sections (or at >> least part of these sections) are in little endian for s390: > > Hi Song, > > Understood, thank you for clarification and sorry for confusion. > This makes sense because btf__distill_base() generates > two new BTF structures and both need to inherit endianness. > > Thanks, > Eduard > > [...] > thanks all for the quick root-cause analysis and proposed fixes! Explicitly checking these cases in the btf_endian selftest is probably worthwhile; I've put together tests that do that for non-native endianness but just noticed you mentioned you're working on tests Eduard. Is that what you had in mind? Arnaldo: apologies but I think we'll either need to back out the distilled stuff for 1.28 or have a new libbpf resync that captures the fixes for endian issues once they land. Let me know what works best for you. Thanks!