From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7432D9446 for ; Sun, 13 Aug 2023 21:34:03 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EC1B7C433C7; Sun, 13 Aug 2023 21:34:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1691962443; bh=xAXx/zt6cnBCjCtuRM7IT7sXecnhScjP6kdh0cGl7Z0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fyqHtd+G3bi0uIp6tJck7P1m6y09kG3plWO+YZZpLIhIzhBFiWlNIxdJhcElK5GTY FgmKTDqDlnqPptJNmMgt38qlQO4Xaic2GdBZ58ZluC7iIz83g3cBfyZP8icxs9Qvst azwxkPzmkka47wWVI6AlTRV3KlAlPCN+FEho7Kns= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Torsten Duwe , Petr Tesarik , Li Zhengyu , Conor Dooley , Palmer Dabbelt Subject: [PATCH 6.1 023/149] riscv/kexec: handle R_RISCV_CALL_PLT relocation type Date: Sun, 13 Aug 2023 23:17:48 +0200 Message-ID: <20230813211719.493069405@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230813211718.757428827@linuxfoundation.org> References: <20230813211718.757428827@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Torsten Duwe commit d0b4f95a51038becce4bdab4789aa7ce59d4ea6e upstream. R_RISCV_CALL has been deprecated and replaced by R_RISCV_CALL_PLT. See Enum 18-19 in Table 3. Relocation types here: https://github.com/riscv-non-isa/riscv-elf-psabi-doc/blob/master/riscv-elf.adoc It was deprecated in ("Deprecated R_RISCV_CALL, prefer R_RISCV_CALL_PLT"): https://github.com/riscv-non-isa/riscv-elf-psabi-doc/commit/a0dced85018d7a0ec17023c9389cbd70b1dbc1b0 Recent tools (at least GNU binutils-2.40) already use R_RISCV_CALL_PLT. Kernels built with such binutils fail kexec_load_file(2) with: kexec_image: Unknown rela relocation: 19 kexec_image: Error loading purgatory ret=-8 The binary code at the call site remains the same, so tell arch_kexec_apply_relocations_add() to handle _PLT alike. Fixes: 838b3e28488f ("RISC-V: Load purgatory in kexec_file") Signed-off-by: Torsten Duwe Signed-off-by: Petr Tesarik Cc: Li Zhengyu Cc: stable@vger.kernel.org Reviewed-by: Conor Dooley Link: https://lore.kernel.org/all/b046b164af8efd33bbdb7d4003273bdf9196a5b0.1690365011.git.petr.tesarik.ext@huawei.com/ Signed-off-by: Palmer Dabbelt Signed-off-by: Greg Kroah-Hartman --- arch/riscv/kernel/elf_kexec.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/riscv/kernel/elf_kexec.c b/arch/riscv/kernel/elf_kexec.c index 5372b708fae2..38390d3bdcac 100644 --- a/arch/riscv/kernel/elf_kexec.c +++ b/arch/riscv/kernel/elf_kexec.c @@ -425,6 +425,7 @@ int arch_kexec_apply_relocations_add(struct purgatory_info *pi, * sym, instead of searching the whole relsec. */ case R_RISCV_PCREL_HI20: + case R_RISCV_CALL_PLT: case R_RISCV_CALL: *(u64 *)loc = CLEAN_IMM(UITYPE, *(u64 *)loc) | ENCODE_UJTYPE_IMM(val - addr); -- 2.41.0