On Mon, Aug 10, 2020 at 4:26 PM Gabriel Krisman Bertazi <krisman@xxxxxxxxxxxxx> wrote: > > Syscall user redirection requires the signal trampoline code to not be > captured, in order to support returning with a locked selector while > avoiding recursion back into the signal handler. For ia-32, which has > the trampoline in the vDSO, expose the entry points to the kernel, such > that it can avoid dispatching syscalls from that region to userspace. Almost looks good. > +int arch_syscall_is_vdso_sigreturn(struct pt_regs *regs) If you make that bool instead of int, feel free to add: Acked-by: Andy Lutomirski <luto@xxxxxxxxxx>
