From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2B855ECE58D for ; Thu, 10 Oct 2019 04:15:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0693E218DE for ; Thu, 10 Oct 2019 04:15:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570680914; bh=rgZXoFS/47pjAMqq2vXgVqgqUhyFh+e5gzQe4A7S+P8=; h=From:To:CC:Subject:Date:In-Reply-To:References:List-ID:From; b=PH5GaNSxeDn4ajJt1xoIt1ibDAXGPyWS+mLYjiiYEYhmd2T9TF1LqKmD9B2BnU0Q9 MXIojEWTAhL1TTFaEA4CFtdYTm13SMPtuy/OigknlvN5BEhsTJQbz7FqKLLQdP+Ozk vUyoAp+4y7rnB0Zt1U3T9e1oCGgHiJ4jI9bgZ98E= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726518AbfJJEPN convert rfc822-to-8bit (ORCPT ); Thu, 10 Oct 2019 00:15:13 -0400 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:3112 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728366AbfJJEPM (ORCPT ); Thu, 10 Oct 2019 00:15:12 -0400 Received: from pps.filterd (m0148461.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id x9A4E6Tr014694 for ; Wed, 9 Oct 2019 21:15:11 -0700 Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com with ESMTP id 2vhfsduty5-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Wed, 09 Oct 2019 21:15:11 -0700 Received: from 2401:db00:12:909f:face:0:3:0 (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:82::f) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Wed, 9 Oct 2019 21:15:09 -0700 Received: by devbig007.ftw2.facebook.com (Postfix, from userid 572438) id 29CD6760CF9; Wed, 9 Oct 2019 21:15:05 -0700 (PDT) Smtp-Origin-Hostprefix: devbig From: Alexei Starovoitov Smtp-Origin-Hostname: devbig007.ftw2.facebook.com To: CC: , , , , Smtp-Origin-Cluster: ftw2c04 Subject: [PATCH v2 bpf-next 01/12] bpf: add typecast to raw_tracepoints to help BTF generation Date: Wed, 9 Oct 2019 21:14:52 -0700 Message-ID: <20191010041503.2526303-2-ast@kernel.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191010041503.2526303-1-ast@kernel.org> References: <20191010041503.2526303-1-ast@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT X-FB-Internal: Safe Content-Type: text/plain X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,1.0.8 definitions=2019-10-10_02:2019-10-08,2019-10-10 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 bulkscore=0 phishscore=0 priorityscore=1501 adultscore=0 lowpriorityscore=0 suspectscore=1 clxscore=1034 mlxlogscore=863 spamscore=0 mlxscore=0 malwarescore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1908290000 definitions=main-1910100037 X-FB-Internal: deliver Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org When pahole converts dwarf to btf it emits only used types. Wrap existing __bpf_trace_##template() function into btf_trace_##template typedef and use it in type cast to make gcc emits this type into dwarf. Then pahole will convert it to btf. The "btf_trace_" prefix will be used to identify BTF enabled raw tracepoints. Signed-off-by: Alexei Starovoitov Acked-by: Andrii Nakryiko Acked-by: John Fastabend --- include/trace/bpf_probe.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/trace/bpf_probe.h b/include/trace/bpf_probe.h index d6e556c0a085..ff1a879773df 100644 --- a/include/trace/bpf_probe.h +++ b/include/trace/bpf_probe.h @@ -74,11 +74,12 @@ static inline void bpf_test_probe_##call(void) \ { \ check_trace_callback_type_##call(__bpf_trace_##template); \ } \ +typedef void (*btf_trace_##template)(void *__data, proto); \ static struct bpf_raw_event_map __used \ __attribute__((section("__bpf_raw_tp_map"))) \ __bpf_trace_tp_map_##call = { \ .tp = &__tracepoint_##call, \ - .bpf_func = (void *)__bpf_trace_##template, \ + .bpf_func = (void *)(btf_trace_##template)__bpf_trace_##template, \ .num_args = COUNT_ARGS(args), \ .writable_size = size, \ }; -- 2.23.0