On 17 January 2014 06:33, Erik de Castro Lopo <mle+to...@mega-nerd.com> wrote: > I'm currently working on implementing a missing part of a linux-user > syscall. This syscall includes a function pointer for a callback.
Which syscall? Callbacks from the kernel are pretty tricky. Basically you need to register a host function as the callback with the host kernel, and stash the guest function pointer somewhere so that when the callback comes in from the host kernel you can arrange to interrupt the guest and restart it at the desired location. Pretty much the only situation we support this for is the special case of signal handlers. In fact I wasn't even aware there was any other kind of kernel-to-userspace callback... thanks -- PMM
