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([2804:1b3:a7c2:efc6:5269:b553:4f00:ba1b]) by smtp.gmail.com with ESMTPSA id 956f58d0204a3-66069abb92csm3827439d50.18.2026.06.01.08.54.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 Jun 2026 08:54:43 -0700 (PDT) From: Adhemerval Zanella To: libc-alpha@sourceware.org Cc: Andreas Schwab Subject: [PATCH] arm: Redirect memcpy to __memcpy_arm for loader/static init code Date: Mon, 1 Jun 2026 12:54:36 -0300 Message-ID: <20260601155438.2985633-1-adhemerval.zanella@linaro.org> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 X-Spam-Status: No, score=-12.6 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_SHORT, RCVD_IN_DNSWL_BLOCKED, SPF_HELO_NONE, SPF_PASS, TXREP, URIBL_BLOCKED shortcircuit=no autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libc-alpha-bounces~patchwork=sourceware.org@sourceware.org After "elf: Initialize TCB and stack-protector before static IFUNC resolvers (BZ 20680, BZ 27582, BZ 28817)", early loader and static initialization code may run before the IFUNC resolvers are processed. The armv7-a supports memcpy, so add a dl-symbol-redir-ifunc.h to redirect the memcpy to to __memcpy_arm implementation. Checked on armv7a-linux-gnueabihf. --- .../armv7/multiarch/dl-symbol-redir-ifunc.h | 24 +++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 sysdeps/arm/armv7/multiarch/dl-symbol-redir-ifunc.h diff --git a/sysdeps/arm/armv7/multiarch/dl-symbol-redir-ifunc.h b/sysdeps/arm/armv7/multiarch/dl-symbol-redir-ifunc.h new file mode 100644 index 00000000000..63fe46f077c --- /dev/null +++ b/sysdeps/arm/armv7/multiarch/dl-symbol-redir-ifunc.h @@ -0,0 +1,24 @@ +/* Symbol redirection for loader/static initialization code. + Copyright (C) 2026 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 + . */ + +#ifndef _DL_IFUNC_GENERIC_H +#define _DL_IFUNC_GENERIC_H + +asm ("memcpy = __memcpy_arm"); + +#endif