From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-182.mta1.migadu.com (out-182.mta1.migadu.com [95.215.58.182]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A455179C8 for ; Thu, 27 Nov 2025 18:53:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.182 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764269600; cv=none; b=MfDEHjgmK40xmU1NbVUtM8MgKt2gJ64n5oXOMM4bpIKGqZyPjY5bpGiv3ljCcmpGD/+EfupVDUntHRessfGFZ8RUiYNFijcSflbzhSfKDlMRdjtaDVayJQ3lWWKUCssq8NZREl5vayF1M9/Z4IHAVlrgwTE4zmz5YgDVJnqhlOc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764269600; c=relaxed/simple; bh=2L9UD345rU94AfBtvlI4dQC63bAGeZGywGagB8VUEFI=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=mzeL0ggpWtmVDUZcOy0hvHLXongd3lbiLHKzn/TGJ0yNgMj1N7weSnf/xGoxZ0D7J1PqWg0tdihLrnOUHTFYM0V83Qds052l6f/hyIOstSVLp3SIvc0TrixyTTApBIwglwUP98rhQbLaDlB3W0XmaoXYO9K5G7uIl0LFqVo5AQA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=VHgv2UZn; arc=none smtp.client-ip=95.215.58.182 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="VHgv2UZn" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1764269595; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=GniM6YWeq8q57UYAO1fBBln/A1ZwY/HbEQa5QXtzgU4=; b=VHgv2UZnKYhAzLcVEt0ru2xlOmBTctJR6vyVekWuhm8sPwB16OMH731lHhsRuPdh2rMR5Y G2VXWK6ZElw3QjgeB0qPg/WH9JKItJd8XEX0SBkjUtD6AiDHuAZifZ05+frzrw7ipA4lEW +4XCDBwd3quuifFVfL1ze1BA6Os+gig= From: Ihor Solodrai To: Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Nathan Chancellor , Nicolas Schier , Nick Desaulniers , Bill Wendling , Justin Stitt , Alan Maguire , Donglin Peng Cc: bpf@vger.kernel.org, dwarves@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org Subject: [PATCH bpf-next v2 0/4] resolve_btfids: Support for BTF modifications Date: Thu, 27 Nov 2025 10:52:38 -0800 Message-ID: <20251127185242.3954132-1-ihor.solodrai@linux.dev> Precedence: bulk X-Mailing-List: linux-kbuild@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT This series changes resolve_btfids and kernel build scripts to enable BTF transformations in resolve_btfids. Main motivation for enhancing resolve_btfids is to reduce dependency of the kernel build on pahole capabilities [1] and enable BTF features and optimizations [2][3] particular to the kernel. Patches #1-#3 in the series are non-functional refactoring in resolve_btfids. The last patch (#4) makes significant changes in resolve_btfids and introduces scripts/gen-btf.sh. Implementation changes are described in detail in the patch description. [1] https://lore.kernel.org/dwarves/ba1650aa-fafd-49a8-bea4-bdddee7c38c9@linux.dev/ [2] https://lore.kernel.org/bpf/20251029190113.3323406-1-ihor.solodrai@linux.dev/ [3] https://lore.kernel.org/bpf/20251119031531.1817099-1-dolinux.peng@gmail.com/ --- v1->v2: - gen-btf.sh and other shell script fixes (Donglin) - update selftests build (Donglin) - generate .BTF.base only when KBUILD_EXTMOD is set (Alan) - proper endianness handling for cross-compilation - change elf_begin mode from ELF_C_RDWR_MMAP to ELF_C_READ_MMAP_PRIVATE - remove compressed_section_fix() - nit NULL check in patch #3 (suggested by AI) v1: https://lore.kernel.org/bpf/20251126012656.3546071-1-ihor.solodrai@linux.dev/ Ihor Solodrai (4): resolve_btfids: rename object btf field to btf_path resolve_btfids: factor out load_btf() resolve_btfids: introduce enum btf_id_kind resolve_btfids: change in-place update with raw binary output MAINTAINERS | 1 + scripts/Makefile.modfinal | 5 +- scripts/gen-btf.sh | 167 ++++++++++++++ scripts/link-vmlinux.sh | 42 +--- tools/bpf/resolve_btfids/main.c | 331 +++++++++++++++++---------- tools/testing/selftests/bpf/Makefile | 5 + 6 files changed, 395 insertions(+), 156 deletions(-) create mode 100755 scripts/gen-btf.sh -- 2.52.0