On Mon, Jun 29, 2020 at 06:25:38PM -0700, Andrii Nakryiko wrote:
>
> > +
> > +SEC("fentry.s/__x64_sys_setdomainname")
> > +int BPF_PROG(test_sys_setdomainname, struct pt_regs *regs)
> > +{
> > + int buf = 0;
> > + long ret;
> > +
> > + ret = bpf_copy_from_user(&buf, sizeof(buf), (void *)regs->di);
> > + if (regs->si == -2 && ret == 0 && buf == 1234)
> > + copy_test++;
> > + if (regs->si == -3 && ret == -EFAULT)
> > + copy_test++;
> > + if (regs->si == -4 && ret == -EFAULT)
> > + copy_test++;
>
> regs->si and regs->di won't compile on non-x86 arches, better to use
> PT_REGS_PARM1() and PT_REGS_PARM2() from bpf_tracing.h.
the test is x86 only due to:
+SEC("fentry.s/__x64_sys_setdomainname")
I guess we can move samples/bpf/trace_common.h into libbpf as well
to clean the whole thing up. Something for later patches.
