[LTP] [RFC PATCH 1/1] regen.sh: Use intptr_t for tst_syscall return

[Cyril Hrubis]

Hi!
> Some syscalls directly return pointers, like brk or mmap. int is currently
> used for the return value in tst_syscall but is not large enough
> to guarantee that such a returned value will fit.
> Instead, use intptr_t which is guaranted to be castable to (void *)
> without loss of data.

Sounds reasonable, glibc syscall returns long but I guess that's because
there was no intptr_t when that was introduced.

> Signed-off-by: Teo Couprie Diaz <teo.coupriediaz@arm.com>
> ---
>  include/lapi/syscalls/regen.sh |   2 +-
>  runtest/check_tst_syscall      | 190 +++++++++++++++++++++++++++++++++
>  2 files changed, 191 insertions(+), 1 deletion(-)
>  create mode 100644 runtest/check_tst_syscall
> 
> diff --git a/include/lapi/syscalls/regen.sh b/include/lapi/syscalls/regen.sh
> index 3bf38fd03..97027e2f3 100755
> --- a/include/lapi/syscalls/regen.sh
> +++ b/include/lapi/syscalls/regen.sh
> @@ -48,7 +48,7 @@ cat << EOF > "${output_pid}"
>  #endif
>  
>  #define tst_syscall(NR, ...) ({ \\
> -	int tst_ret; \\
> +	intptr_t tst_ret; \\
>  	if (NR == __LTP__NR_INVALID_SYSCALL) { \\
>  		errno = ENOSYS; \\
>  		tst_ret = -1; \\
> diff --git a/runtest/check_tst_syscall b/runtest/check_tst_syscall
> new file mode 100644
> index 000000000..7a6003593
> --- /dev/null
> +++ b/runtest/check_tst_syscall

I do not think that we shoud add this file, at least not in this commit
and without any good description.

-- 
Cyril Hrubis
chrubis@suse.cz