On Tue, Aug 18, 2015 at 12:23:12PM +0200, Gabriel Pérez-Cerezo wrote: > At Tue, 18 Aug 2015 11:15:59 +0100, > Dimitris Papastamos wrote: > > > The command prints > > > [Aug 18 11:55:55] WARNING torsocks[14305]: [syscall] Unsupported > > > syscall number 240. Denying the call (in tsocks_syscall() at > > > syscall.c:165) > > > to STDOUT. > > > > What syscall is it? > I don't know. I tried man syscall and man syscalls but none of them > contain a list of syscalls by number. How do I look it up?
Numbers are different per architecture. For i686 I guess the right place to look is here[0]. Futexes are not directly used by surf but indirectly by libc. I don't think there is much we can do here, this seems like an issue on the torsocks side. By denying the system call, perhaps something is left uninitialized and then crashes. [0] http://lxr.free-electrons.com/source/arch/x86/syscalls/syscall_32.tbl
