From patchwork Fri Feb 4 04:19:50 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ilya Leoshkevich X-Patchwork-Id: 12734773 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 806A7C433EF for ; Fri, 4 Feb 2022 04:20:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1356926AbiBDEUg (ORCPT ); Thu, 3 Feb 2022 23:20:36 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:13658 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1356924AbiBDEUg (ORCPT ); Thu, 3 Feb 2022 23:20:36 -0500 Received: from pps.filterd (m0098393.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 2140cHb5005760; Fri, 4 Feb 2022 04:20:11 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=ygOiSm6MhzrgR2TBkzch1RM1YEmSu5YGG87uEsHyJqk=; b=aWZ4Y48IWAeQAgjP0+sOyxPM7duGJBFVplT6hXAL/tuLHY+NzmMBp+wr8XR4Kkt3HIAs WW0PeRUJ813VB2Wl2Z+NtnHMCGmuhgGcIAMY/Hh5wAzbRoL+3cShTSWcqO+nM6YE++q1 AbBEH30bV9OMH26JVlZa6zYw+XB/HF6rboFDG338xu6TlJrZOCJhDpH7jKMkzqj/H7a4 TkxGdy2Z7Gt8V5sGbY3LyuZIm91I/7l1bvCZqj9kC+o8dEXiQ4eq9v6ZvqIfUtS6oxiJ X+po1ormAJ0vFvjWahCmNmoauK4lqnkEk0a3p9+hjy5NjtxnlfEuNAqWOAcI/47ulM/p aw== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 3e0r124hd9-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 04 Feb 2022 04:20:11 +0000 Received: from m0098393.ppops.net (m0098393.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 21440Ioa019397; Fri, 4 Feb 2022 04:20:10 GMT Received: from ppma01fra.de.ibm.com (46.49.7a9f.ip4.static.sl-reverse.com [159.122.73.70]) by mx0a-001b2d01.pphosted.com with ESMTP id 3e0r124hcp-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 04 Feb 2022 04:20:10 +0000 Received: from pps.filterd (ppma01fra.de.ibm.com [127.0.0.1]) by ppma01fra.de.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 2144Da4I014603; Fri, 4 Feb 2022 04:20:08 GMT Received: from b06avi18878370.portsmouth.uk.ibm.com (b06avi18878370.portsmouth.uk.ibm.com [9.149.26.194]) by ppma01fra.de.ibm.com with ESMTP id 3e0r11h2yd-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 04 Feb 2022 04:20:07 +0000 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 2144K32b39387446 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 4 Feb 2022 04:20:03 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 091CFA4055; Fri, 4 Feb 2022 04:20:03 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6C5D4A404D; Fri, 4 Feb 2022 04:20:02 +0000 (GMT) Received: from heavy.lan (unknown [9.171.78.41]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 4 Feb 2022 04:20:02 +0000 (GMT) From: Ilya Leoshkevich To: Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Catalin Marinas , Michael Ellerman , Paul Walmsley Cc: bpf@vger.kernel.org, Ilya Leoshkevich Subject: [PATCH bpf-next v2 05/10] libbpf: Add PT_REGS_SYSCALL macro Date: Fri, 4 Feb 2022 05:19:50 +0100 Message-Id: <20220204041955.1958263-6-iii@linux.ibm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220204041955.1958263-1-iii@linux.ibm.com> References: <20220204041955.1958263-1-iii@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: VaZDNVvbDn2AJ_wsEbh3NoQusH5f8o6J X-Proofpoint-ORIG-GUID: C3IKHdXEkJ9n5Hx7hZt8IW5kP3gIROoX X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.816,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2022-02-04_01,2022-02-03_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 impostorscore=0 malwarescore=0 mlxlogscore=936 lowpriorityscore=0 clxscore=1015 bulkscore=0 priorityscore=1501 suspectscore=0 adultscore=0 spamscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2201110000 definitions=main-2202040019 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net Some architectures pass a pointer to struct pt_regs to syscall handlers, others unpack it into individual function parameters. Introduce a macro to describe what a particular arch does, using `passing pt_regs *` as a default. Signed-off-by: Ilya Leoshkevich --- tools/lib/bpf/bpf_tracing.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/tools/lib/bpf/bpf_tracing.h b/tools/lib/bpf/bpf_tracing.h index 30f0964f8c9e..400a4f002f77 100644 --- a/tools/lib/bpf/bpf_tracing.h +++ b/tools/lib/bpf/bpf_tracing.h @@ -334,6 +334,15 @@ struct pt_regs; #endif /* defined(bpf_target_defined) */ +/* + * When invoked from a syscall handler kprobe, returns a pointer to a + * struct pt_regs containing syscall arguments and suitable for passing to + * PT_REGS_PARMn_SYSCALL() and PT_REGS_PARMn_CORE_SYSCALL(). + */ +#ifndef PT_REGS_SYSCALL +#define PT_REGS_SYSCALL(ctx) ((struct pt_regs *)PT_REGS_PARM1(ctx)) +#endif + #ifndef ___bpf_concat #define ___bpf_concat(a, b) a ## b #endif