Messages in this thread | | | From | Dmitry Shmidt <> | Date | Tue, 31 May 2016 13:24:59 -0700 | Subject | Re: building and using modules on arm64 hikey board |
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On Mon, May 30, 2016 at 4:30 AM, Ard Biesheuvel <ard.biesheuvel@linaro.org> 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?
Actually Arend is using 4.4, and we need to pull your fix, Ard:
commit 80a2d83376001f6a1993f2e925670ab0e4cdb76d Author: Ard Biesheuvel <ard.biesheuvel@linaro.org> Date: Tue Jan 5 10:18:52 2016 +0100
arm64: module: avoid undefined shift behavior in reloc_data()
>> On 30 mei 2016, at 12:21, Arend Van Spriel <arend.vanspriel@broadcom.com> 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 >> <module-common.lds> >> <vmlinux.lds> > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
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