From patchwork Sat Jul 8 15:36:33 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhangjin Wu X-Patchwork-Id: 117444 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:9f45:0:b0:3ea:f831:8777 with SMTP id v5csp3998538vqx; Sat, 8 Jul 2023 08:52:50 -0700 (PDT) X-Google-Smtp-Source: APBJJlGaFSHiNS4DM29/sZIazgqoSBs6gD5QnGtTjlwJOXm+g6qBEJTxq5lo96QBZwyE1QxQ2u9b X-Received: by 2002:a05:6a21:3814:b0:126:9081:2156 with SMTP id yi20-20020a056a21381400b0012690812156mr4659649pzb.4.1688831569954; Sat, 08 Jul 2023 08:52:49 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1688831569; cv=none; d=google.com; s=arc-20160816; b=Mxy0Y3f8EnajwEptsGApy/pPrYC7xVGdUHlovHQuzWsnF8eu/bTOYz4iavW4uLo+Uz ySJF2diMlTIOfIOXZyNnGGX/9FFXFAp3y7Tvz4oEO2KXQ40ueJQj0NygfGZyfDt7szTK BejrhS9B0DBiNHWlfiViBlmWqLztjNgtYJaYs89YY00eTVJ9j8RMr/1kCyBP8GugREHu w12NFCbETeDBA4pdrnys9BOhILAO6gHJRxSBHJ6BQmlcGHLewzgTgduW5WyQDSXCowuW ZdnZrxJEKy4WeqgJ5tnWJWlwNWA6pTSVAZAw/+PiImNoms77x/SBZWgNmm6m0UtGR+YU SvYA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:feedback-id:content-transfer-encoding :mime-version:references:in-reply-to:message-id:date:subject:cc:to :from; bh=DsZSrkO/yzfIaw4CInRvA44u3fabuCr1uuOYbtZgsKA=; fh=kgRNfNE6xRCHBUX3iUlrLhv5pQPglsdZFzOkxo2Fhpc=; b=PjqzHEuKAJi3aKVBS5Q6LFC8CUn/FFNMWcpcp8DwKOygX33E9wG8fQfXpHn3Ea+f16 8MGnwJIqZnhe40EJGYXFmPvMpVLym8MAB3UR44SkeZ2itiaMM8+NY77JgjywR7X3i9Wa 4NYGawa+OMNSCcytYgI2duOfzl3Ekz98QEf5gfCjRdT/EY6fKdGHQ9sxGKpLb0rOZLNQ Tq78KSM60EurjtdMiI8sgYaxTE8dIpCRntqmq/tttuxNrMQdgE8Uu7FBAwmaMF4XsX8J 67MONmRbfUsMfVJUyF5gNzABnR48Nsx+J68tE/rBHAo9/iIE+KPhgnuEQJPIkA00+Oa5 5Sng== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id l36-20020a635724000000b0054ff0e193desi5970420pgb.49.2023.07.08.08.52.36; Sat, 08 Jul 2023 08:52:49 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229833AbjGHPgy (ORCPT + 99 others); Sat, 8 Jul 2023 11:36:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34308 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229436AbjGHPgx (ORCPT ); Sat, 8 Jul 2023 11:36:53 -0400 Received: from bg4.exmail.qq.com (bg4.exmail.qq.com [43.155.65.254]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D25CFB8; Sat, 8 Jul 2023 08:36:50 -0700 (PDT) X-QQ-mid: bizesmtp86t1688830599tw66g3er Received: from linux-lab-host.localdomain ( [116.30.131.119]) by bizesmtp.qq.com (ESMTP) with id ; Sat, 08 Jul 2023 23:36:37 +0800 (CST) X-QQ-SSF: 01200000000000D0W000000A0000000 X-QQ-FEAT: W+onFc5Tw4Pe9rZqENKFEXMbSRh7Eb3+Jr9OU9bz39iaWL+qI45aWo7EyeNr5 vz/B5cB4JSaGvK2qJUl6k2KQNV3MGBN6Uj84RTUkDwdW2jEEp3Hz9lm5A7br7JwDjuZASLD wRsVyB6VsMDvRVOGmaOgXLxG1OkaU1/AlC56GNg5PI5O7M45DLBXrPNKO9+Ten5f6DiC6m3 ivOeaBse7tvOVGGif1d1+qQsGTYRZk93BsQBDX8PoIsojSAXqWy//4mKs0yLQbQ4akgIokO ilS870OH4IeIpSYz9UfkjAID068mm54T0k+ga4VCzPvwdu+OHNmA/ISEYEhpnrRJUE65MrI VnGwkdNzlRmZ3A2fwhM/CKPln7zQFLwE4SYbElvYflo2nofzwdZEvNnX1s8gMEQdAPH/SGu X-QQ-GoodBg: 0 X-BIZMAIL-ID: 3025394520600983061 From: Zhangjin Wu To: w@1wt.eu Cc: falcon@tinylab.org, arnd@arndb.de, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, thomas@t-8ch.de Subject: [PATCH v2 10/12] tools/nolibc: loongarch/crt.h: shrink _start with _start_c Date: Sat, 8 Jul 2023 23:36:33 +0800 Message-Id: <47893d501e6d4ededa233e2596ac32f219480270.1688828139.git.falcon@tinylab.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 X-QQ-SENDSIZE: 520 Feedback-ID: bizesmtp:tinylab.org:qybglogicsvrgz:qybglogicsvrgz5a-1 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_BLOCKED,RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_PASS, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1770868252321289426?= X-GMAIL-MSGID: =?utf-8?q?1770868252321289426?= move most of the _start operations to _start_c(). Signed-off-by: Zhangjin Wu --- tools/include/nolibc/loongarch/crt.h | 39 +++------------------------- 1 file changed, 4 insertions(+), 35 deletions(-) diff --git a/tools/include/nolibc/loongarch/crt.h b/tools/include/nolibc/loongarch/crt.h index 253d2fccea1e..00bfc36b0747 100644 --- a/tools/include/nolibc/loongarch/crt.h +++ b/tools/include/nolibc/loongarch/crt.h @@ -8,22 +8,8 @@ #define _NOLIBC_LOONGARCH_CRT_H #if __loongarch_grlen == 32 -#define LONGLOG "2" -#define SZREG "4" -#define REG_L "ld.w" -#define LONG_S "st.w" -#define LONG_ADD "add.w" -#define LONG_ADDI "addi.w" -#define LONG_SLL "slli.w" #define LONG_BSTRINS "bstrins.w" #else /* __loongarch_grlen == 64 */ -#define LONGLOG "3" -#define SZREG "8" -#define REG_L "ld.d" -#define LONG_S "st.d" -#define LONG_ADD "add.d" -#define LONG_ADDI "addi.d" -#define LONG_SLL "slli.d" #define LONG_BSTRINS "bstrins.d" #endif @@ -32,28 +18,11 @@ void __attribute__((weak, noreturn, optimize("omit-frame-pointer"))) __no_stack_ { __asm__ volatile ( #ifdef _NOLIBC_STACKPROTECTOR - "bl __stack_chk_init\n" /* initialize stack protector */ + "bl __stack_chk_init\n" /* initialize stack protector */ #endif - REG_L " $a0, $sp, 0\n" /* argc (a0) was in the stack */ - LONG_ADDI " $a1, $sp, "SZREG"\n" /* argv (a1) = sp + SZREG */ - LONG_SLL " $a2, $a0, "LONGLOG"\n" /* envp (a2) = SZREG*argc ... */ - LONG_ADDI " $a2, $a2, "SZREG"\n" /* + SZREG (skip null) */ - LONG_ADD " $a2, $a2, $a1\n" /* + argv */ - - "move $a3, $a2\n" /* iterate a3 over envp to find auxv (after NULL) */ - "0:\n" /* do { */ - REG_L " $a4, $a3, 0\n" /* a4 = *a3; */ - LONG_ADDI " $a3, $a3, "SZREG"\n" /* a3 += sizeof(void*); */ - "bne $a4, $zero, 0b\n" /* } while (a4); */ - "la.pcrel $a4, _auxv\n" /* a4 = &_auxv */ - LONG_S " $a3, $a4, 0\n" /* store a3 into _auxv */ - - "la.pcrel $a3, environ\n" /* a3 = &environ */ - LONG_S " $a2, $a3, 0\n" /* store envp(a2) into environ */ - LONG_BSTRINS " $sp, $zero, 3, 0\n" /* sp must be 16-byte aligned */ - "bl main\n" /* main() returns the status code, we'll exit with it. */ - "li.w $a7, 93\n" /* NR_exit == 93 */ - "syscall 0\n" + "move $a0, $sp\n" /* save stack pointer to $a0, as arg1 of _start_c */ + LONG_BSTRINS " $sp, $zero, 3, 0\n" /* $sp must be 16-byte aligned */ + "bl _start_c\n" /* transfer to c runtime */ ); __builtin_unreachable(); }