From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161888AbcE3Syh (ORCPT ); Mon, 30 May 2016 14:54:37 -0400 Received: from mail-wm0-f44.google.com ([74.125.82.44]:36301 "EHLO mail-wm0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161557AbcE3Syg (ORCPT ); Mon, 30 May 2016 14:54:36 -0400 Subject: Re: building and using modules on arm64 hikey board To: Ard Biesheuvel References: <87a3195c-febb-a6c8-a679-272b9f7b59cc@broadcom.com> <0240F9F0-0146-4DCC-B512-195415B29B34@linaro.org> Cc: linux-arm-kernel@lists.infradead.org, "linux-kernel@vger.kernel.org" , Russell King , Hante Meuleman From: Arend van Spriel Message-ID: <574C8C69.6020501@broadcom.com> Date: Mon, 30 May 2016 20:54:33 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 MIME-Version: 1.0 In-Reply-To: <0240F9F0-0146-4DCC-B512-195415B29B34@linaro.org> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 30-05-16 13:30, Ard Biesheuvel wrote: > This is likely caused by the fact that the Android AArch64 toolchain uses -fpic by default. Could you try adding -fno-pic to the CFLAGS? I did only to notice with 'make V=1 ...' that it was already used hence showing up in the compile command line twice. To no avail so that ain't working. Regards, Arend >> On 30 mei 2016, at 12:21, Arend Van Spriel wrote: >> >> I got myself an arm64 HiKey board from LeMaker and build an Android AOSP >> image for it (see [1]). For development I would like to use >> CONFIG_MODULES. However, when I try to insmod the build module I get: >> >> [ 287.903653] module cfg80211: overflow in relocation type 261 val >> ffffffbffc006530 >> >> Looking AArch64 ELF documentation [2], section 4.6.5, it has: >> code|name |operation |overflow check | >> 261 |R_AARCH64_PREL32|S + A - P |-2^31 <= X < 2^32| >> >> So basically the highest 32 bits should all be one and so ffffffbf is >> invalid. From what I could find searching internet it could be an issue >> with linker options so I build kernel and modules with V=1. Here the >> linker invocation for them: >> >> + aarch64-linux-android-ld -EL -p --no-undefined -X --build-id -o vmlinux \ >> -T ./arch/arm64/kernel/vmlinux.lds arch/arm64/kernel/head.o >> init/built-in.o \ >> --start-group usr/built-in.o arch/arm64/kernel/built-in.o >> arch/arm64/mm/built-in.o \ >> arch/arm64/net/built-in.o arch/arm64/kvm/built-in.o >> arch/arm64/crypto/built-in.o \ >> ./drivers/firmware/efi/libstub/lib.a kernel/built-in.o certs/built-in.o >> mm/built-in.o \ >> fs/built-in.o ipc/built-in.o security/built-in.o crypto/built-in.o >> block/built-in.o \ >> arch/arm64/lib/lib.a lib/lib.a arch/arm64/lib/built-in.o lib/built-in.o >> drivers/built-in.o \ >> sound/built-in.o firmware/built-in.o net/built-in.o virt/built-in.o >> --end-group .tmp_kallsyms2.o >> >> aarch64-linux-android-ld -EL -r -T ./scripts/module-common.lds >> --build-id \ >> -o net/wireless/cfg80211.ko net/wireless/cfg80211.o >> net/wireless/cfg80211.mod.o >> >> Attached are vmlinux.lds and module-common.lds. I also tried taking >> upstream arch/arm64/kernel/module.lds in hikey-linaro tree. If someone >> can give a hint or educated guess at what to try it would be appreciated. >> >> Regards, >> Arend >> >> [1] https://source.android.com/source/devices.html#building-kernel >> [2] >> http://infocenter.arm.com/help/topic/com.arm.doc.ihi0056b/IHI0056B_aaelf64.pdf >> >>