[yocto] Cannot run simple binary executable file

[Denys Dmytriyenko]

On Tue, Oct 07, 2014 at 07:05:42PM -0700, Wy kevinthesun wrote:
> However, a new problem occurs. Now when I tries run HelloWorld binary,
> after "Hello World" is printed, the terminal also prints "Segmentation
> fault". It seems that some memory problems occurs. I guess it comes from
> that the 1.5.1 yocto system on boards hopes ld-linux-armhf.so.3 as dynamic
> linker, instead of ld-linux.so.3, which is used by toolchain. There may be
> some memory address problem between them. How can I solve it?

As Nicolas suggested earlier, it seems you are trying to mix ABIs here. 
Because ld-linux-armhf.so.3 indicates the system uses hardfp ABI, but the 
example app you built with your toolchain wants ld-linux.so.3, which is 
usually the old softfp ABI. You'd need to match ABIs and the easiest solution 
is to use the same toolchain that was used to build the system (1.5.1?)

-- 
Denys


> 2014-10-07 18:17 GMT-07:00 Wy kevinthesun <kevinthesunwy at gmail.com>:
> 
> > Problem solved! It turns out it is the mismatch of ld-linux.so. I referred
> > to this post
> > http://stackoverflow.com/questions/24543474/cross-compiled-gnu-arm-beagleboneblack-from-windows-runtime-error-on-elf,
> > and found my problem was exactly the same: the binary needs
> > /lib/ld-linux.so.3 to run, but that file is missing in the 1.5.1 yocto
> > system on board. Then I copied ld-linux.so.3 file from Yocto toolchain on
> > my pc. Then it works!
> >
> > Thank you!
> >
> > 2014-10-07 8:21 GMT-07:00 Nicolas Dechesne <nicolas.dechesne at linaro.org>:
> >
> > On Tue, Oct 7, 2014 at 1:07 PM, Wy kevinthesun <kevinthesunwy at gmail.com>
> >> wrote:
> >> > Hi, I am new to Yocto Project and learning to develop software on Atmel
> >> > SAMA5D3 Xplained board, on which Yocto 1.5.1 is pre-built. I followed
> >> the
> >> > instructions and got the 1.6.1 toolchain
> >> >
> >> > poky-eglibc-i686-core-image-sato-armv7a-vfp-neon-toolchain-1.6.1.sh.
> >> >
> >> > I can compile the simple HelloWorld program and binary file is made.
> >> Then I
> >> > copied the binary file
> >> >
> >> > into board and tried to run it. However, when I changed to the file
> >> located
> >> > directory and type
> >> >
> >> > "./Hello", it returned "sh: ./Hello: No such file or directory". Then I
> >> > tried "sh Hello", it gave
> >> >
> >> > me  "Hello: Hello: cannot execute binary file ". If I type "file
> >> Hello", it
> >> > gives "Hello: ELF 32-bit
> >> >  LSB  executable, ARM, EABI5 version 1 (SYSV), dynamically linked (uses
> >> > shared libs), for GNU/Linux 2.6.16,
> >> > BuildID[sha1]=9933a2d2ce212099c5f9902a8e612c1423e136da, not stripped". I
> >> > googled and someone
> >> >
> >> > said the problem may be the toolchain. Then I tried 1.3, 1.5.1
> >> toolchain for
> >> > arm, but still same
> >> >
> >> > error. Could you please help me about this problem?
> >>
> >>
> >> i suspect this is an armv7 soft-float vs hard-float mismatch. Either
> >> your prebuilt OE system is configured with soft-float and the
> >> toolchain you use compiled for hard-float by default, or the other way
> >> around. can you check how you've compile HelloWolrd and check the
> >> other ABI?
> >>
> >
> >

> -- 
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