On Mon, 2018-12-03 at 10:14 +0200, Nadav Har'El wrote:
>
> Unfortunately, I haven't heard from anyone in the two groups who
> previously contributed the ARM support to OSv, so it's not making any
> progress.
> If I understand correctly, OSv still builds correctly for ARM (make
> arch=aarch64) but although the kernel supposedly worked, it didn't
> have disk drivers, so you can only build the example application into
> the kernel (i.e., a ramdisk, scripts/build image=... fs=ramfs).
> There's definitely no support for anything new which just came out.
> But if you're interested to work on it, you are very welcome to adopt
> OSv's ARM support.
I'm also interested in aarch64 support. I can get it to build the
release (though it tries to build the disk image using qemu-system-x86
which probably isn't going to help) - but it fails to start, hittng
entry_invalid in arch/aarch64/entry.S.
(gdb) bt
#0 entry_invalid () at arch/aarch64/entry.S:132
#1 0x00000000402c6f8c in debug_early (msg=0x200003c5 "",
msg@entry=0x404f93a8 "OSv v0.53.0-3-g8cd7d8aa\n") at
core/debug.cc:271
#2 0x00000000400d6898 in premain () at loader.cc:101
#3 0x00000000400c004c in start_elf () at arch/aarch64/boot.S:37
The debug release fails to build at all, failing like this:
...
AS bootfs.S
LINK loader.elf
build/debug.aarch64/arch/aarch64/boot.o: In function `start_elf':
/home/rickp/src/osv-armtest/arch/aarch64/boot.S:40:(.text+0x50):
relocation truncated to fit: R_AARCH64_LDST64_ABS_LO12_NC against
symbol `__loader_argc' defined in .bss section in
build/debug.aarch64/loader.o
/home/rickp/src/osv-armtest/arch/aarch64/boot.S:40: warning: One
possible cause of this error is that the symbol is being referenced in
the indicated code as if it had a larger alignment than was declared
where it was defined.
make: *** [build/debug.aarch64/loader.elf] Error 1
Makefile:1873: recipe for target 'build/debug.aarch64/loader.elf'
failed
make failed. Exiting from build script
If anyone else is interesting in making some progress, let me know -
it'd be great to get this booting on the new AWS instances (or if you
have hardware, that'd be interesting too!)
Cheers,
Rick
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