From patchwork Wed Aug 30 01:07:45 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ilya Leoshkevich X-Patchwork-Id: 13369878 X-Patchwork-Delegate: bpf@iogearbox.net Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 8F900136F for ; Wed, 30 Aug 2023 01:12:04 +0000 (UTC) Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 202A395 for ; Tue, 29 Aug 2023 18:12:03 -0700 (PDT) Received: from pps.filterd (m0360072.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 37U0a7rQ000308; Wed, 30 Aug 2023 01:11:50 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=fM1sirOJT7BRqoHVsvo0JeJwkNvfPDMwG1dKsr5rVVg=; b=XY3q6an/iXx9/LoC1VXhYuTivEaLiTdt7HP8OZeuWNaOObELvSq1LhOtIBVQF8eRmh5+ QMu6mUY5agYGGtq58ZgomNOoXXbHepyFA7YR0ND7wmCqhQOVNhQxTb4FnPqv44+kEBpW ZsfAJZnoOfA5Y+ClLPsedmlXw0+mhaeOVoi0yqEjfMpTjJdqyDS6zyLodvGYxcvoDbNk IrHkxzbU69tarAJO6oDGlDzZxhytHop98mZ0pZNo8yvP+ZFkjjNEkgvgpRQ3ZjY/mwJX 14X8MmMNEK3dOPjL5O+9PJfCMOBUvJ+DL96MQfNcL/9XW63Suku+pSXGvbXCJO5ijc/5 6w== Received: from ppma23.wdc07v.mail.ibm.com (5d.69.3da9.ip4.static.sl-reverse.com [169.61.105.93]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3ssu0xgxrb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 30 Aug 2023 01:11:49 +0000 Received: from pps.filterd (ppma23.wdc07v.mail.ibm.com [127.0.0.1]) by ppma23.wdc07v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 37U0j96Q009855; Wed, 30 Aug 2023 01:11:49 GMT Received: from smtprelay07.fra02v.mail.ibm.com ([9.218.2.229]) by ppma23.wdc07v.mail.ibm.com (PPS) with ESMTPS id 3sqw7kftb3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 30 Aug 2023 01:11:49 +0000 Received: from smtpav04.fra02v.mail.ibm.com (smtpav04.fra02v.mail.ibm.com [10.20.54.103]) by smtprelay07.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 37U1Bkmf63701426 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 30 Aug 2023 01:11:46 GMT Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 214732004D; Wed, 30 Aug 2023 01:11:46 +0000 (GMT) Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A2CED20040; Wed, 30 Aug 2023 01:11:45 +0000 (GMT) Received: from heavy.boeblingen.de.ibm.com (unknown [9.171.5.44]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 30 Aug 2023 01:11:45 +0000 (GMT) From: Ilya Leoshkevich To: Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko Cc: bpf@vger.kernel.org, Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Ilya Leoshkevich Subject: [PATCH bpf-next 04/11] selftests/bpf: Add big-endian support to the ldsx test Date: Wed, 30 Aug 2023 03:07:45 +0200 Message-ID: <20230830011128.1415752-5-iii@linux.ibm.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230830011128.1415752-1-iii@linux.ibm.com> References: <20230830011128.1415752-1-iii@linux.ibm.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: x560xm39XEPV7nzk-_k1yU6965unVeuo X-Proofpoint-ORIG-GUID: x560xm39XEPV7nzk-_k1yU6965unVeuo X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.957,Hydra:6.0.601,FMLib:17.11.176.26 definitions=2023-08-29_16,2023-08-29_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 bulkscore=0 phishscore=0 adultscore=0 mlxscore=0 lowpriorityscore=0 priorityscore=1501 impostorscore=0 mlxlogscore=999 spamscore=0 clxscore=1015 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2308100000 definitions=main-2308300008 X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,RCVD_IN_MSPIKE_H4,RCVD_IN_MSPIKE_WL, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: bpf@iogearbox.net Prepare the ldsx test to run on big-endian systems by adding the necessary endianness checks around narrow memory accesses. Signed-off-by: Ilya Leoshkevich --- .../selftests/bpf/progs/test_ldsx_insn.c | 6 +- .../selftests/bpf/progs/verifier_ldsx.c | 146 ++++++++++-------- 2 files changed, 90 insertions(+), 62 deletions(-) diff --git a/tools/testing/selftests/bpf/progs/test_ldsx_insn.c b/tools/testing/selftests/bpf/progs/test_ldsx_insn.c index 67c14ba1e87b..3709e5eb7dd0 100644 --- a/tools/testing/selftests/bpf/progs/test_ldsx_insn.c +++ b/tools/testing/selftests/bpf/progs/test_ldsx_insn.c @@ -104,7 +104,11 @@ int _tc(volatile struct __sk_buff *skb) "%[tmp_mark] = r1" : [tmp_mark]"=r"(tmp_mark) : [ctx]"r"(skb), - [off_mark]"i"(offsetof(struct __sk_buff, mark)) + [off_mark]"i"(offsetof(struct __sk_buff, mark) +#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ + + sizeof(skb->mark) - 1 +#endif + ) : "r1"); #else tmp_mark = (char)skb->mark; diff --git a/tools/testing/selftests/bpf/progs/verifier_ldsx.c b/tools/testing/selftests/bpf/progs/verifier_ldsx.c index 0c638f45aaf1..803dc1d492a7 100644 --- a/tools/testing/selftests/bpf/progs/verifier_ldsx.c +++ b/tools/testing/selftests/bpf/progs/verifier_ldsx.c @@ -12,12 +12,16 @@ __description("LDSX, S8") __success __success_unpriv __retval(-2) __naked void ldsx_s8(void) { - asm volatile (" \ - r1 = 0x3fe; \ - *(u64 *)(r10 - 8) = r1; \ - r0 = *(s8 *)(r10 - 8); \ - exit; \ -" ::: __clobber_all); + asm volatile ( + "r1 = 0x3fe;" + "*(u64 *)(r10 - 8) = r1;" +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + "r0 = *(s8 *)(r10 - 8);" +#else + "r0 = *(s8 *)(r10 - 1);" +#endif + "exit;" + ::: __clobber_all); } SEC("socket") @@ -25,12 +29,16 @@ __description("LDSX, S16") __success __success_unpriv __retval(-2) __naked void ldsx_s16(void) { - asm volatile (" \ - r1 = 0x3fffe; \ - *(u64 *)(r10 - 8) = r1; \ - r0 = *(s16 *)(r10 - 8); \ - exit; \ -" ::: __clobber_all); + asm volatile ( + "r1 = 0x3fffe;" + "*(u64 *)(r10 - 8) = r1;" +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + "r0 = *(s16 *)(r10 - 8);" +#else + "r0 = *(s16 *)(r10 - 2);" +#endif + "exit;" + ::: __clobber_all); } SEC("socket") @@ -38,13 +46,17 @@ __description("LDSX, S32") __success __success_unpriv __retval(-1) __naked void ldsx_s32(void) { - asm volatile (" \ - r1 = 0xfffffffe; \ - *(u64 *)(r10 - 8) = r1; \ - r0 = *(s32 *)(r10 - 8); \ - r0 >>= 1; \ - exit; \ -" ::: __clobber_all); + asm volatile ( + "r1 = 0xfffffffe;" + "*(u64 *)(r10 - 8) = r1;" +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + "r0 = *(s32 *)(r10 - 8);" +#else + "r0 = *(s32 *)(r10 - 4);" +#endif + "r0 >>= 1;" + "exit;" + ::: __clobber_all); } SEC("socket") @@ -53,20 +65,24 @@ __log_level(2) __success __retval(1) __msg("R1_w=scalar(smin=-128,smax=127)") __naked void ldsx_s8_range_priv(void) { - asm volatile (" \ - call %[bpf_get_prandom_u32]; \ - *(u64 *)(r10 - 8) = r0; \ - r1 = *(s8 *)(r10 - 8); \ - /* r1 with s8 range */ \ - if r1 s> 0x7f goto l0_%=; \ - if r1 s< -0x80 goto l0_%=; \ - r0 = 1; \ -l1_%=: \ - exit; \ -l0_%=: \ - r0 = 2; \ - goto l1_%=; \ -" : + asm volatile ( + "call %[bpf_get_prandom_u32];" + "*(u64 *)(r10 - 8) = r0;" +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + "r1 = *(s8 *)(r10 - 8);" +#else + "r1 = *(s8 *)(r10 - 1);" +#endif + /* r1 with s8 range */ + "if r1 s> 0x7f goto l0_%=;" + "if r1 s< -0x80 goto l0_%=;" + "r0 = 1;" +"l1_%=:" + "exit;" +"l0_%=:" + "r0 = 2;" + "goto l1_%=;" + : : __imm(bpf_get_prandom_u32) : __clobber_all); } @@ -76,20 +92,24 @@ __description("LDSX, S16 range checking") __success __success_unpriv __retval(1) __naked void ldsx_s16_range(void) { - asm volatile (" \ - call %[bpf_get_prandom_u32]; \ - *(u64 *)(r10 - 8) = r0; \ - r1 = *(s16 *)(r10 - 8); \ - /* r1 with s16 range */ \ - if r1 s> 0x7fff goto l0_%=; \ - if r1 s< -0x8000 goto l0_%=; \ - r0 = 1; \ -l1_%=: \ - exit; \ -l0_%=: \ - r0 = 2; \ - goto l1_%=; \ -" : + asm volatile ( + "call %[bpf_get_prandom_u32];" + "*(u64 *)(r10 - 8) = r0;" +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + "r1 = *(s16 *)(r10 - 8);" +#else + "r1 = *(s16 *)(r10 - 2);" +#endif + /* r1 with s16 range */ + "if r1 s> 0x7fff goto l0_%=;" + "if r1 s< -0x8000 goto l0_%=;" + "r0 = 1;" +"l1_%=:" + "exit;" +"l0_%=:" + "r0 = 2;" + "goto l1_%=;" + : : __imm(bpf_get_prandom_u32) : __clobber_all); } @@ -99,20 +119,24 @@ __description("LDSX, S32 range checking") __success __success_unpriv __retval(1) __naked void ldsx_s32_range(void) { - asm volatile (" \ - call %[bpf_get_prandom_u32]; \ - *(u64 *)(r10 - 8) = r0; \ - r1 = *(s32 *)(r10 - 8); \ - /* r1 with s16 range */ \ - if r1 s> 0x7fffFFFF goto l0_%=; \ - if r1 s< -0x80000000 goto l0_%=; \ - r0 = 1; \ -l1_%=: \ - exit; \ -l0_%=: \ - r0 = 2; \ - goto l1_%=; \ -" : + asm volatile ( + "call %[bpf_get_prandom_u32];" + "*(u64 *)(r10 - 8) = r0;" +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + "r1 = *(s32 *)(r10 - 8);" +#else + "r1 = *(s32 *)(r10 - 4);" +#endif + /* r1 with s16 range */ + "if r1 s> 0x7fffFFFF goto l0_%=;" + "if r1 s< -0x80000000 goto l0_%=;" + "r0 = 1;" +"l1_%=:" + "exit;" +"l0_%=:" + "r0 = 2;" + "goto l1_%=;" + : : __imm(bpf_get_prandom_u32) : __clobber_all); }