Simulator question about argc/argv

Andrew Pinski pinskia@gmail.com
Fri May 31 16:50:00 GMT 2013


On Fri, May 31, 2013 at 9:47 AM, Steve Ellcey <sellcey@mips.com> wrote:
>
> Some new tests have been added to the GCC testsuite (cilk tests) that
> check the value of argc and they expect it to be 1 if there are no
> arguments to the test program (and there are none) but I am getting 0
> when I run the tests under the gnu simulator.  Does anyone know why
> this is?  I don't know if this is specific to my target (mips-mti-elf)
> or a general simulator problem.  Perhaps it is related to my linker
> script?  The mips-mti-elf target is built with newlib.  Could someone
> else who uses the gnu simulator and newlib try this.  It works fine for
> me under the qemu simulator.
>
> % cat x.c
> #include <stdio.h>
> int main(int argc, char **argv)
> {
>   printf("%d\n", argc);
>   return 0;
> }
>
> % mips-mti-elf-gcc x.c -Tmti32.ld -o x
> % mips-mti-elf-run ./x
> 0
> % mips-mti-elf-run ./x 99
> 0


I get a similar thing on both of Cavium's internal simulators (MIPS64
and AARCH64) when running with bare metal.  I normally just go and fix
the testcase not to depend on argc.

Thanks,
Andrew

>
> Steve Ellcey
> sellcey@mips.com
>



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