Re: sparc elf

[Jeff Johnston <jjohnstn at redhat dot com>]

Niklaus wrote:
> Hi,
> I have been trying to build sparc elf executables from i386. I got
> gcc,binutils and newlibc and configured them with target=sparc-elf .
> Now when i got gcc and binutils working , i wrote a small program
>
> test.c:
> int main()
> {
> return 3;
> }
>
> i compiled it using sparc-elf-gcc -c test.c.
> ./sparc-elf-ld --entry=main test.o -o a.out
> when i executed a.out on sparc machine it segfaulted and dumped core.
>
> Why does this happen. This is a very small executable and everything
> is static. Where i am i doing wrong.

Niklaus,

  The entry point is not main.  The entry point typically is _start 
which is provided by crt0.o and eventually calls main.  I would not 
advise linking yourself.  Let the compiler do it for you (i.e. don't use 
sparc-elf-ld, use sparc-elf-gcc instead).  There are a number of ld 
scripts in the libgloss/sparc directory.  You may have to specify one of 
the them explicitly (via the -Txxx.ld option on the compile) if the 
compiler doesn't default an appropriate one for you.  If your board is 
unique, you may have to take one of the closest ld scripts you can find 
and modify it.

-- Jeff J.