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[209.132.180.131]) by mx.google.com with ESMTPS id x71si1407343pgd.517.2017.10.12.14.10.42 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 12 Oct 2017 14:10:42 -0700 (PDT) Received-SPF: pass (google.com: domain of libc-alpha-return-85765-patch=linaro.org@sourceware.org designates 209.132.180.131 as permitted sender) client-ip=209.132.180.131; Authentication-Results: mx.google.com; dkim=pass header.i=@sourceware.org header.s=default header.b=I3Z4d18L; spf=pass (google.com: domain of libc-alpha-return-85765-patch=linaro.org@sourceware.org designates 209.132.180.131 as permitted sender) smtp.mailfrom=libc-alpha-return-85765-patch=linaro.org@sourceware.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=linaro.org DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:from:to:subject:date:message-id:in-reply-to :references; q=dns; s=default; b=Yc8lEgP/l42L4W1Th3BvTlNpqDmDUC/ X8+Eg6Pv/+FnKkacyIf6LwbwaK7sMtTkm28BKt2HvkqkOnJlcq1zt6H69GzUSX+U DEZNF2i6MaEc8/qZ9+qcaW5+V9zPvJBdfFUo+WaAHauPnRqpGdHXOvOe8dOyNCay 9dmKS84uq0bI= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:from:to:subject:date:message-id:in-reply-to :references; s=default; bh=9F3+GZt/iE/UDGiVVTG3P/0ttrk=; b=I3Z4d 18LgC/RtbeBmbGebgJO9KIx0u9/veCXzxzkGA7sHiDFT195vbkg6L4CK3dDfh5f/ 4R1bF0NTIAvkaxzN54jH6uoEHCWBKQW71X+iEHhg5em0YzotyOyVa3qM4xlTMBWo WKORW3+Q0Rts3tB1IlVWFf24aEw7s7x69W+l+E= Received: (qmail 102930 invoked by alias); 12 Oct 2017 21:10:03 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Delivered-To: mailing list libc-alpha@sourceware.org Received: (qmail 102765 invoked by uid 89); 12 Oct 2017 21:10:03 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-27.0 required=5.0 tests=BAYES_00, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, KAM_STOCKGEN, RCVD_IN_DNSWL_LOW, RCVD_IN_SORBS_SPAM, SPF_PASS autolearn=ham version=3.3.2 spammy= X-HELO: mail-qt0-f182.google.com X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references; bh=1ZcjlBYXu6s4ftvLe1zI3kSgtGwRXogQFShvxv+mrDE=; b=QDmi689gRbZ5Wd63VOclMArdX/KMiAMjk7UftHtslZnegbFERazX2AWqbZRSYuL3Gb w9rZemIGQ0y2+Wd0b3CMa6F5cCkJSCG/xq409CcJC4RJ9fs39w6FWKvdqpgr8op3qGzG piQiUsz1551L/NHCNBabm/juKyleRYJMwpJimg4SetqTYvAXEpC8YF4V0l0FW05ZBQN4 9u6jC0vEgjrVl7H9BW1+82Rc1iMFu3U44eBB8oNNXnUg6j7+PoSSHeYjxV9p9khxPmeo 4pNqTu6TfEv4MrGub6MSNFTw9FayRZ1a0eTNsjgXkngowBV9VpdXUQb87dhjQnQ1u4ZO v2vQ== X-Gm-Message-State: AMCzsaWhxl2n1QnnqRx6YThJD3BbkPdhPMMklDJATD/uoN2L4Ih6xSi5 LruiLB3WwT3H6P9c2kvUHwECBgzQhPo= X-Google-Smtp-Source: AOwi7QCWUrHdhBGoKsX5AVLni5n0CJWM+2UXx/09s/XdcNfOLuXtj4SqbiqbVsbOTiqOF01E/Uzk5g== X-Received: by 10.200.38.50 with SMTP id u47mr5516461qtu.112.1507842598884; Thu, 12 Oct 2017 14:09:58 -0700 (PDT) From: Adhemerval Zanella To: libc-alpha@sourceware.org Subject: [PATCH 4/5] arm: Implement memcpy ifunc selection in C Date: Thu, 12 Oct 2017 18:09:43 -0300 Message-Id: <1507842584-28674-4-git-send-email-adhemerval.zanella@linaro.org> In-Reply-To: <1507842584-28674-1-git-send-email-adhemerval.zanella@linaro.org> References: <1507842584-28674-1-git-send-email-adhemerval.zanella@linaro.org> This patch refactor ARM memcpy ifunc selector to a C implementation. No functional change is expected, including ifunc resolution rules. Checked on armv7-linux-gnueabihf and with a build for arm-linux-gnueabi, arm-linux-gnueabihf with and without multiarch support and with both GCC 7.1 and GCC mainline. * sysdeps/arm/arm-ifunc.h: New file. * sysdeps/arm/armv7/multiarch/ifunc-memcpy.h: Likewise. * sysdeps/arm/armv7/multiarch/memcpy.c: Likewise. * sysdeps/arm/armv7/multiarch/memcpy_arm.S: Likewise. * sysdeps/arm/armv7/multiarch/rtld-memcpy.S: Likewise. * sysdeps/arm/armv7/multiarch/Makefile [$(subdir) = string] (sysdep_routines): Add memcpy_arm. * sysdeps/arm/armv7/multiarch/memcpy.S: Remove file. --- ChangeLog | 9 ++++ sysdeps/arm/arm-ifunc.h | 33 +++++++++++++ sysdeps/arm/armv7/multiarch/Makefile | 2 +- sysdeps/arm/armv7/multiarch/ifunc-memcpy.h | 37 +++++++++++++++ sysdeps/arm/armv7/multiarch/memcpy.S | 76 ------------------------------ sysdeps/arm/armv7/multiarch/memcpy.c | 33 +++++++++++++ sysdeps/arm/armv7/multiarch/memcpy_arm.S | 6 +++ sysdeps/arm/armv7/multiarch/rtld-memcpy.S | 1 + 8 files changed, 120 insertions(+), 77 deletions(-) create mode 100644 sysdeps/arm/arm-ifunc.h create mode 100644 sysdeps/arm/armv7/multiarch/ifunc-memcpy.h delete mode 100644 sysdeps/arm/armv7/multiarch/memcpy.S create mode 100644 sysdeps/arm/armv7/multiarch/memcpy.c create mode 100644 sysdeps/arm/armv7/multiarch/memcpy_arm.S create mode 100644 sysdeps/arm/armv7/multiarch/rtld-memcpy.S -- 2.7.4 diff --git a/sysdeps/arm/arm-ifunc.h b/sysdeps/arm/arm-ifunc.h new file mode 100644 index 0000000..52cb533 --- /dev/null +++ b/sysdeps/arm/arm-ifunc.h @@ -0,0 +1,33 @@ +/* Common definition for ifunc resolvers. Linux/ARM version. + This file is part of the GNU C Library. + Copyright (C) 2017 Free Software Foundation, Inc. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include +#include + +#define INIT_ARCH() + +#define arm_libc_ifunc_redirected(redirected_name, name, expr) \ + __ifunc (redirected_name, name, expr(hwcap), int hwcap, INIT_ARCH) + +#if defined SHARED +# define arm_libc_ifunc_hidden_def(redirect_name, name) \ + __hidden_ver1 (name, __GI_##name, redirect_name) \ + __attribute__ ((visibility ("hidden"))) +#else +# define arm_libc_ifunc_hidden_def(redirect_name, name) +#endif diff --git a/sysdeps/arm/armv7/multiarch/Makefile b/sysdeps/arm/armv7/multiarch/Makefile index 9e1e61c..1e62ef9 100644 --- a/sysdeps/arm/armv7/multiarch/Makefile +++ b/sysdeps/arm/armv7/multiarch/Makefile @@ -1,3 +1,3 @@ ifeq ($(subdir),string) -sysdep_routines += memcpy_neon memcpy_vfp memchr_neon +sysdep_routines += memcpy_neon memcpy_vfp memchr_neon memcpy_arm endif diff --git a/sysdeps/arm/armv7/multiarch/ifunc-memcpy.h b/sysdeps/arm/armv7/multiarch/ifunc-memcpy.h new file mode 100644 index 0000000..78cef2a --- /dev/null +++ b/sysdeps/arm/armv7/multiarch/ifunc-memcpy.h @@ -0,0 +1,37 @@ +/* Common definition for memcpy resolver. + Copyright (C) 2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#ifdef __SOFTFP__ +__typeof (REDIRECT_NAME) OPTIMIZE (arm) attribute_hidden; +#endif +__typeof (REDIRECT_NAME) OPTIMIZE (vfp) attribute_hidden; +__typeof (REDIRECT_NAME) OPTIMIZE (neon) attribute_hidden; + +static inline void * +IFUNC_SELECTOR (int hwcap) +{ + if (hwcap & HWCAP_ARM_NEON) + return OPTIMIZE (neon); +#ifdef __SOFTFP__ + if (hwcap & HWCAP_ARM_VFP) + return OPTIMIZE (vfp); + return OPTIMIZE (arm); +#else + return OPTIMIZE (vfp); +#endif +} diff --git a/sysdeps/arm/armv7/multiarch/memcpy.S b/sysdeps/arm/armv7/multiarch/memcpy.S deleted file mode 100644 index 8a53bda..0000000 --- a/sysdeps/arm/armv7/multiarch/memcpy.S +++ /dev/null @@ -1,76 +0,0 @@ -/* Multiple versions of memcpy - All versions must be listed in ifunc-impl-list.c. - Copyright (C) 2013-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - . */ - -/* Thumb requires excess IT instructions here. */ -#define NO_THUMB -#include -#include - -#if IS_IN (libc) -/* Under __ARM_NEON__, memcpy_neon.S defines the name memcpy. */ -# ifndef __ARM_NEON__ - .text -ENTRY(memcpy) - .type memcpy, %gnu_indirect_function -# ifdef __SOFTFP__ - ldr r1, .Lmemcpy_arm - tst r0, #HWCAP_ARM_VFP - ldrne r1, .Lmemcpy_vfp -# else - ldr r1, .Lmemcpy_vfp -# endif - tst r0, #HWCAP_ARM_NEON - ldrne r1, .Lmemcpy_neon -1: - add r0, r1, pc - DO_RET(lr) - -# ifdef __SOFTFP__ -.Lmemcpy_arm: - .long C_SYMBOL_NAME(__memcpy_arm) - 1b - PC_OFS -# endif -.Lmemcpy_neon: - .long C_SYMBOL_NAME(__memcpy_neon) - 1b - PC_OFS -.Lmemcpy_vfp: - .long C_SYMBOL_NAME(__memcpy_vfp) - 1b - PC_OFS - -END(memcpy) - -libc_hidden_builtin_def (memcpy) -#endif /* Not __ARM_NEON__. */ - -/* These versions of memcpy are defined not to clobber any VFP or NEON - registers so they must always call the ARM variant of the memcpy code. */ -strong_alias (__memcpy_arm, __aeabi_memcpy) -strong_alias (__memcpy_arm, __aeabi_memcpy4) -strong_alias (__memcpy_arm, __aeabi_memcpy8) -libc_hidden_def (__memcpy_arm) - -#undef libc_hidden_builtin_def -#define libc_hidden_builtin_def(name) -#undef weak_alias -#define weak_alias(x, y) -#undef libc_hidden_def -#define libc_hidden_def(name) - -#define memcpy __memcpy_arm - -#endif - -#include "memcpy_impl.S" diff --git a/sysdeps/arm/armv7/multiarch/memcpy.c b/sysdeps/arm/armv7/multiarch/memcpy.c new file mode 100644 index 0000000..7ef6714 --- /dev/null +++ b/sysdeps/arm/armv7/multiarch/memcpy.c @@ -0,0 +1,33 @@ +/* Multiple versions of memcpy. + All versions must be listed in ifunc-impl-list.c. + Copyright (C) 2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#if IS_IN (libc) +# define memcpy __redirect_memcpy +# include +# undef memcpy + +# include + +# define SYMBOL_NAME memcpy +# include "ifunc-memcpy.h" + +arm_libc_ifunc_redirected (__redirect_memcpy, memcpy, IFUNC_SELECTOR); + +arm_libc_ifunc_hidden_def (__redirect_memcpy, memcpy); +#endif diff --git a/sysdeps/arm/armv7/multiarch/memcpy_arm.S b/sysdeps/arm/armv7/multiarch/memcpy_arm.S new file mode 100644 index 0000000..37565cd --- /dev/null +++ b/sysdeps/arm/armv7/multiarch/memcpy_arm.S @@ -0,0 +1,6 @@ +#define memcpy __memcpy_arm +#include "memcpy_impl.S" + +strong_alias (__memcpy_arm, __aeabi_memcpy) +strong_alias (__memcpy_arm, __aeabi_memcpy4) +strong_alias (__memcpy_arm, __aeabi_memcpy8) diff --git a/sysdeps/arm/armv7/multiarch/rtld-memcpy.S b/sysdeps/arm/armv7/multiarch/rtld-memcpy.S new file mode 100644 index 0000000..0190edc --- /dev/null +++ b/sysdeps/arm/armv7/multiarch/rtld-memcpy.S @@ -0,0 +1 @@ +#include <./sysdeps/arm/armv7/multiarch/memcpy_impl.S>