Messages in this thread | | | Date | Tue, 31 May 2016 09:53:57 +0800 | From | Jisheng Zhang <> | Subject | Re: building and using modules on arm64 hikey board |
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On Mon, 30 May 2016 20:54:33 +0200 Arend van Spriel <arend.vanspriel@broadcom.com> wrote:
> 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.
Per my experience, the default ld in android toolchain is gold, can you plz try to use ld.bfd instead?
> > Regards, > Arend > > >> 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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