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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=ham 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 837D5C433DB for ; Sun, 24 Jan 2021 06:30:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 483CE22C7B for ; Sun, 24 Jan 2021 06:30:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726206AbhAXG34 (ORCPT ); Sun, 24 Jan 2021 01:29:56 -0500 Received: from out30-130.freemail.mail.aliyun.com ([115.124.30.130]:50844 "EHLO out30-130.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726054AbhAXG3z (ORCPT ); Sun, 24 Jan 2021 01:29:55 -0500 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R141e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04423;MF=tianjia.zhang@linux.alibaba.com;NM=1;PH=DS;RN=13;SR=0;TI=SMTPD_---0UMfTHu-_1611469748; Received: from localhost(mailfrom:tianjia.zhang@linux.alibaba.com fp:SMTPD_---0UMfTHu-_1611469748) by smtp.aliyun-inc.com(127.0.0.1); Sun, 24 Jan 2021 14:29:08 +0800 From: Tianjia Zhang To: Jarkko Sakkinen , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Sean Christopherson , Shuah Khan , x86@kernel.org, linux-sgx@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Jia Zhang Cc: Tianjia Zhang Subject: [PATCH v3 1/5] selftests/x86: Simplify the code to get vdso base address in sgx Date: Sun, 24 Jan 2021 14:29:03 +0800 Message-Id: <20210124062907.88229-2-tianjia.zhang@linux.alibaba.com> X-Mailer: git-send-email 2.19.1.3.ge56e4f7 In-Reply-To: <20210124062907.88229-1-tianjia.zhang@linux.alibaba.com> References: <20210124062907.88229-1-tianjia.zhang@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-sgx@vger.kernel.org This patch uses the library function `getauxval(AT_SYSINFO_EHDR)` instead of the custom function `vdso_get_base_addr` to obtain the base address of vDSO, which will simplify the code implementation. Signed-off-by: Tianjia Zhang --- tools/testing/selftests/sgx/main.c | 24 ++++-------------------- 1 file changed, 4 insertions(+), 20 deletions(-) diff --git a/tools/testing/selftests/sgx/main.c b/tools/testing/selftests/sgx/main.c index 724cec700926..365d01dea67b 100644 --- a/tools/testing/selftests/sgx/main.c +++ b/tools/testing/selftests/sgx/main.c @@ -15,6 +15,7 @@ #include #include #include +#include #include "defines.h" #include "main.h" #include "../kselftest.h" @@ -28,24 +29,6 @@ struct vdso_symtab { Elf64_Word *elf_hashtab; }; -static void *vdso_get_base_addr(char *envp[]) -{ - Elf64_auxv_t *auxv; - int i; - - for (i = 0; envp[i]; i++) - ; - - auxv = (Elf64_auxv_t *)&envp[i + 1]; - - for (i = 0; auxv[i].a_type != AT_NULL; i++) { - if (auxv[i].a_type == AT_SYSINFO_EHDR) - return (void *)auxv[i].a_un.a_val; - } - - return NULL; -} - static Elf64_Dyn *vdso_get_dyntab(void *addr) { Elf64_Ehdr *ehdr = addr; @@ -162,7 +145,7 @@ static int user_handler(long rdi, long rsi, long rdx, long ursp, long r8, long r return 0; } -int main(int argc, char *argv[], char *envp[]) +int main(int argc, char *argv[]) { struct sgx_enclave_run run; struct vdso_symtab symtab; @@ -203,7 +186,8 @@ int main(int argc, char *argv[], char *envp[]) memset(&run, 0, sizeof(run)); run.tcs = encl.encl_base; - addr = vdso_get_base_addr(envp); + /* Get vDSO base address */ + addr = (void *)(uintptr_t)getauxval(AT_SYSINFO_EHDR); if (!addr) goto err; -- 2.19.1.3.ge56e4f7