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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C60D7C05027 for ; Fri, 20 Jan 2023 20:10:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229654AbjATUJ7 convert rfc822-to-8bit (ORCPT ); Fri, 20 Jan 2023 15:09:59 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53902 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229630AbjATUJx (ORCPT ); Fri, 20 Jan 2023 15:09:53 -0500 Received: from mx0b-00082601.pphosted.com (mx0b-00082601.pphosted.com [67.231.153.30]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D4AB79DCAC for ; Fri, 20 Jan 2023 12:09:50 -0800 (PST) Received: from pps.filterd (m0109331.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 30KDb3aX019632 for ; Fri, 20 Jan 2023 12:09:50 -0800 Received: from mail.thefacebook.com ([163.114.132.120]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3n7gdede80-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Fri, 20 Jan 2023 12:09:49 -0800 Received: from twshared15216.17.frc2.facebook.com (2620:10d:c085:108::4) by mail.thefacebook.com (2620:10d:c085:21d::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.34; Fri, 20 Jan 2023 12:09:48 -0800 Received: by devbig019.vll3.facebook.com (Postfix, from userid 137359) id 728D525B4B119; Fri, 20 Jan 2023 12:09:46 -0800 (PST) From: Andrii Nakryiko To: , , CC: , , Ilya Leoshkevich Subject: [PATCH v2 bpf-next 15/25] libbpf: define s390x syscall regs spec in bpf_tracing.h Date: Fri, 20 Jan 2023 12:09:04 -0800 Message-ID: <20230120200914.3008030-16-andrii@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230120200914.3008030-1-andrii@kernel.org> References: <20230120200914.3008030-1-andrii@kernel.org> X-FB-Internal: Safe Content-Type: text/plain X-Proofpoint-GUID: qlFnqwRoDvjMJQVmj-KeflqmskokK0Vd X-Proofpoint-ORIG-GUID: qlFnqwRoDvjMJQVmj-KeflqmskokK0Vd Content-Transfer-Encoding: 8BIT X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.930,Hydra:6.0.562,FMLib:17.11.122.1 definitions=2023-01-20_10,2023-01-20_01,2022-06-22_01 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Define explicit table of registers used for syscall argument passing. Note that we need custom overrides for PT_REGS_PARM1_[CORE_]SYSCALL macros due to the need to use BPF CO-RE and custom local pt_regs definitions to fetch orig_gpr2, storing 1st argument. Acked-by: Ilya Leoshkevich Tested-by: Ilya Leoshkevich # s390x Signed-off-by: Andrii Nakryiko --- tools/lib/bpf/bpf_tracing.h | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/tools/lib/bpf/bpf_tracing.h b/tools/lib/bpf/bpf_tracing.h index 4d04c63fda27..b63d538eb5f5 100644 --- a/tools/lib/bpf/bpf_tracing.h +++ b/tools/lib/bpf/bpf_tracing.h @@ -157,6 +157,10 @@ #elif defined(bpf_target_s390) +/* + * https://github.com/IBM/s390x-abi/releases/download/v1.6/lzsabi_s390x.pdf + */ + struct pt_regs___s390 { unsigned long orig_gpr2; }; @@ -168,13 +172,22 @@ struct pt_regs___s390 { #define __PT_PARM3_REG gprs[4] #define __PT_PARM4_REG gprs[5] #define __PT_PARM5_REG gprs[6] + +#define __PT_PARM1_SYSCALL_REG orig_gpr2 +#define __PT_PARM2_SYSCALL_REG __PT_PARM2_REG +#define __PT_PARM3_SYSCALL_REG __PT_PARM3_REG +#define __PT_PARM4_SYSCALL_REG __PT_PARM4_REG +#define __PT_PARM5_SYSCALL_REG __PT_PARM5_REG +#define __PT_PARM6_SYSCALL_REG gprs[7] +#define PT_REGS_PARM1_SYSCALL(x) PT_REGS_PARM1_CORE_SYSCALL(x) +#define PT_REGS_PARM1_CORE_SYSCALL(x) \ + BPF_CORE_READ((const struct pt_regs___s390 *)(x), __PT_PARM1_SYSCALL_REG) + #define __PT_RET_REG gprs[14] #define __PT_FP_REG gprs[11] /* Works only with CONFIG_FRAME_POINTER */ #define __PT_RC_REG gprs[2] #define __PT_SP_REG gprs[15] #define __PT_IP_REG psw.addr -#define PT_REGS_PARM1_SYSCALL(x) PT_REGS_PARM1_CORE_SYSCALL(x) -#define PT_REGS_PARM1_CORE_SYSCALL(x) BPF_CORE_READ((const struct pt_regs___s390 *)(x), orig_gpr2) #elif defined(bpf_target_arm) -- 2.30.2