On 07/20, Jiri Olsa wrote: > > Adding new uprobe syscall that calls uprobe handlers for given > 'breakpoint' address. > > The idea is that the 'breakpoint' address calls the user space > trampoline which executes the uprobe syscall. > > The syscall handler reads the return address of the initial call > to retrieve the original 'breakpoint' address. With this address > we find the related uprobe object and call its consumers. > > Adding the arch_uprobe_trampoline_mapping function that provides > uprobe trampoline mapping. This mapping is backed with one global > page initialized at __init time and shared by the all the mapping > instances. > > We do not allow to execute uprobe syscall if the caller is not > from uprobe trampoline mapping. > > The uprobe syscall ensures the consumer (bpf program) sees registers > values in the state before the trampoline was called. > > Acked-by: Andrii Nakryiko <andrii@xxxxxxxxxx> > Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx> My ack still stands, Acked-by: Oleg Nesterov <oleg@xxxxxxxxxx>
