Re: is ARMv4T deprecated?

On 4/6/15 6:32 PM, Waldemar Brodkorb wrote:
> Hi,
> Sergiy Kibrik wrote,
> 
>> hi All,
>> Recently I've been trying to use uClibc for quite old arm920t-based
>> board. Some busybox applications (like shell, mount, hostname, wget)
>> would get killed with SIGILL. I managed to debug it down to leaving
>> memcpy() routine, namely to the following code from
>> libc/string/arm/memcpy.S:
>>
>> [..]
>> .thumb_func
>> memcpy:
>> 	push	{r0, lr}
>> 	bl	_memcpy
>> 	POP_RET
>> [..]
>>
>> POP_RET defined as pop {r2, pc} in [1]. On armv4t is just won't switch
>> CPU back to arm mode, so in my case it seems to be jumping to calling
>> arm routine while still being in thumb mode.
>>
>> I'm not sure if this is the case, but I've also found couple of comments
>> in code:
>> http://git.uclibc.org/uClibc/tree/ldso/ldso/arm/resolve.S#n62
>> http://git.uclibc.org/uClibc/tree/libc/sysdeps/linux/arm/crtn.S#n10
>>
>> stating that some parts aren't even supposed to work on armv4t.
>> Has armv4t been deprecated for good (I use master branch currently)?
>> Thanks.
> 
> Does it work with uClibc 0.9.33 release?

didn't actually tried 0.9.33, as I used yocto 1.7 to build rootfs, it
fetches uclibc from master only

> What board is this?

it's Netronix eb600 (e-book reader), based on samsung s3c2440 SoC

> Are you tried running thumb-only?
> 

no, but I tried running ARM-only, and it seems to be working (though I
didn't run any tests)

--
regards,
Sergey

_______________________________________________
uClibc mailing list
[email protected]
http://lists.busybox.net/mailman/listinfo/uclibc

-----BEGIN PGP SIGNATURE-----
Version: GnuPG/MacGPG2 v2.0.18 (Darwin)
Comment: GPGTools - http://gpgtools.org

iJwEAQECAAYFAlUi1kIACgkQDcLhAeYaZvgGYAQAgomlzlo9Ngnevwfl6STSMEYf
3M21r/ik/dJYPeCZgjwpSRAREF5UxAYTGqq6zcoWR8qf4KnA5iGXIi1iopsRGvoT
Xy9QXm2PcruOP4rFn8u/sOxeRreCb63G5VWDH6b8xxaMPUKcfheyFzyy5yLw0ogP
aKHoGIVVBFo+X+HvsAo=
=MAKd
-----END PGP SIGNATURE-----