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: 700690 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 96555EB64DA for ; Sat, 8 Jul 2023 15:36:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229496AbjGHPgy (ORCPT ); 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 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org 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(); }