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Hi Ian,

Since finishing the very beginning setup assembly, I was turning to adding
necessary headers and empty functions to build the binary. After introducing
those bit operations, spinlocks etc., I thought I have a basic framework to
pass the first build. However, when comming to the final linking stage,
there are errors:

arm-linux-gnueabihf-ld -T arch/arm/minios-arm32.lds
/home/cbz/src/xen/extras/mini-os/mini-os.o -o
//home/cbz/src/xen/extras/mini-os/mini-os
/home/cbz/src/xen/extras/mini-os/mini-os.o: In function `init_blkfront':
/home/cbz/src/xen/extras/mini-os/blkfront.c:122: undefined reference to `__aeabi_uldivmod'
/home/cbz/src/xen/extras/mini-os/blkfront.c:122: undefined reference to `__aeabi_uldivmod'
/home/cbz/src/xen/extras/mini-os/blkfront.c:122: undefined reference to `__aeabi_uldivmod'
/home/cbz/src/xen/extras/mini-os/blkfront.c:122: undefined reference to `__aeabi_uldivmod'
/home/cbz/src/xen/extras/mini-os/blkfront.c:122: undefined reference to `__aeabi_uldivmod'
/home/cbz/src/xen/extras/mini-os/mini-os.o:/home/cbz/src/xen/extras/mini-os/blkfront.c:122: more undefined references to `__aeabi_uldivmod' follow
/home/cbz/src/xen/extras/mini-os/mini-os.o:(.ARM.exidx+0x0): undefined reference to `__aeabi_unwind_cpp_pr0'
/home/cbz/src/xen/extras/mini-os/mini-os.o:(.ARM.exidx+0x50): undefined reference to `__aeabi_unwind_cpp_pr0'
make: *** [/home/cbz/src/xen/extras/mini-os/mini-os] Error 1

I googled that error message. Some has mentioned that add "-fno-exceptions
-fno-unwind tables" could sovle the problem. I tried, but got the same
errors.

Any ideas?

BTW, after pass my first build, I would consider implementing support in the
toolstack for generating a DTB for guest on ARM platform.

Baozi

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