Jan, this fixes step-fork.c on powerpc.
Without this patch it just hangs, see
http://marc.info/?t=125924748600001
On 12/01, Veaceslav Falico wrote:
>
> Instead of using fork(), call syscall(__NR_fork) in step-fork.c
> to avoid looping on powerpc arch in libc.
>
> Signed-off-by: Veaceslav Falico <vfal...@redhat.com>
> ---
>
> --- a/ptrace-tests/tests/step-fork.c 2009-12-01 17:17:14.000000000 +0100
> +++ b/ptrace-tests/tests/step-fork.c 2009-12-01 18:35:15.000000000 +0100
> @@ -29,6 +29,7 @@
> #include <unistd.h>
> #include <sys/wait.h>
> #include <string.h>
> +#include <sys/syscall.h>
> #include <signal.h>
>
> #ifndef PTRACE_SINGLESTEP
> @@ -78,7 +79,12 @@ main (int argc, char **argv)
> sigprocmask (SIG_BLOCK, &mask, NULL);
> ptrace (PTRACE_TRACEME);
> raise (SIGUSR1);
> - if (fork () == 0)
> +
> + /*
> + * Can't use fork() directly because on powerpc it loops inside libc
> under
> + * PTRACE_SINGLESTEP. See
> http://marc.info/?l=linux-kernel&m=125927241130695
> + */
> + if (syscall(__NR_fork) == 0)
> {
> read (-1, NULL, 0);
> _exit (22);
