Illegal instruction on i.mx21

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I am working with Virtual Cogs boards with i.mx21 processor. I use the
toolchain from and compile it like the site says.

It builds standalone applications good but but when it comes to building
linux applications, we have a problem. When I try to run something from
the linux distro from the producer of the board, my "hello world" program
(actually everything) terminates with "Illegal Instruction".

I tried arm-9tdmi version of crosstool( ).
this time, /bin/sh gave the error "Permission denied" even if I run chmod
+x and am root.

What can be the cause of this Illegal instruction pain?

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