9o8KvbLX5X4UPsgNL1LUqSN4BiQVsLVnxAZTLV0vhG/0qb/ 5dxKc+vuScTTJG1b81r2jm5mpIvqxUR0VjEF4waXWopXhLPAdDx+G2Rqk7PV46tquqXr4P PnRvxKnMLBV/G+pzw02DRKnbldoZRVI/0TB+wiBx7SVd8KnLOmOI/FUPSrpsVA== ARC-Authentication-Results: i=1; mx1.freebsd.org; none Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) by mxrelay.nyi.freebsd.org (Postfix) with ESMTP id 4dVRBg3D1XzCYX for ; Mon, 15 Dec 2025 17:00:11 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from git (uid 1279) (envelope-from git@FreeBSD.org) id e18b by gitrepo.freebsd.org (DragonFly Mail Agent v0.13+ on gitrepo.freebsd.org); Mon, 15 Dec 2025 17:00:11 +0000 To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Jessica Clarke Subject: git: a06143795a22 - stable/14 - libc/csu: Support IFUNCs on riscv List-Id: Commits to the stable branches of the FreeBSD src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-branches List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-branches@freebsd.org Sender: owner-dev-commits-src-branches@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: jrtc27 X-Git-Repository: src X-Git-Refname: refs/heads/stable/14 X-Git-Reftype: branch X-Git-Commit: a06143795a22d8d99f1736656eaff754e81d8ab1 Auto-Submitted: auto-generated Date: Mon, 15 Dec 2025 17:00:11 +0000 Message-Id: <69403e9b.e18b.24cc0f39@gitrepo.freebsd.org> The branch stable/14 has been updated by jrtc27: URL: https://cgit.FreeBSD.org/src/commit/?id=a06143795a22d8d99f1736656eaff754e81d8ab1 commit a06143795a22d8d99f1736656eaff754e81d8ab1 Author: Jessica Clarke AuthorDate: 2024-10-18 18:14:58 +0000 Commit: Jessica Clarke CommitDate: 2025-12-15 16:58:44 +0000 libc/csu: Support IFUNCs on riscv When adding support to rtld-elf I neglected the fact that static binaries can have IFUNCs. Add support for this too. Fixes: 729d2b16b74f ("rtld-elf: Support IFUNCs on riscv") MFC after: 1 week (cherry picked from commit 1363acbf25de4c36e183cfa0b0e801d4dd9bf2ad) --- lib/libc/csu/riscv/Makefile.inc | 4 +-- lib/libc/csu/riscv/reloc.c | 63 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 65 insertions(+), 2 deletions(-) diff --git a/lib/libc/csu/riscv/Makefile.inc b/lib/libc/csu/riscv/Makefile.inc index 2534e6579f38..5d59d40eb393 100644 --- a/lib/libc/csu/riscv/Makefile.inc +++ b/lib/libc/csu/riscv/Makefile.inc @@ -1,4 +1,4 @@ # -CFLAGS+= -DCRT_IRELOC_SUPPRESS \ - -DINIT_IRELOCS="" +CFLAGS+= -DCRT_IRELOC_RELA \ + -DINIT_IRELOCS="init_cpu_features(env)" diff --git a/lib/libc/csu/riscv/reloc.c b/lib/libc/csu/riscv/reloc.c new file mode 100644 index 000000000000..036ea3de8701 --- /dev/null +++ b/lib/libc/csu/riscv/reloc.c @@ -0,0 +1,63 @@ +/*- + * Copyright (c) 2019 Leandro Lupori + * Copyright (c) 2024 Jessica Clarke + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +static unsigned long elf_hwcap; + +static void +init_cpu_features(char **env) +{ + const Elf_Auxinfo *aux; + + /* Find the auxiliary vector on the stack. */ + while (*env++ != 0) /* Skip over environment, and NULL terminator */ + ; + aux = (const Elf_Auxinfo *)env; + + /* Digest the auxiliary vector. */ + for (; aux->a_type != AT_NULL; aux++) { + switch (aux->a_type) { + case AT_HWCAP: + elf_hwcap = (uint32_t)aux->a_un.a_val; + break; + } + } +} + +static void +crt1_handle_rela(const Elf_Rela *r) +{ + typedef Elf_Addr (*ifunc_resolver_t)( + unsigned long, unsigned long, unsigned long, unsigned long, + unsigned long, unsigned long, unsigned long, unsigned long); + Elf_Addr *ptr, *where, target; + + switch (ELF_R_TYPE(r->r_info)) { + case R_RISCV_IRELATIVE: + ptr = (Elf_Addr *)r->r_addend; + where = (Elf_Addr *)r->r_offset; + target = ((ifunc_resolver_t)ptr)(elf_hwcap, + 0, 0, 0, 0, 0, 0, 0); + *where = target; + break; + } +}