On Wednesday 30 September 2009, Linus Torvalds wrote: > Umm. I don't think that is possible. > > You need architecture-specific code to even get access to all registers to > copy and get a signal-handler-compatible stack frame. See for example > arch/alpha/kernel/entry.S with the switch-stack thing etc. I don't think > there is any way to make that even remotely architecture-neutral. Right, you still need to save all the registers from the entry code. I was under the wrong assumption that task_pt_regs(current) would give the full register set on all architectures. However, I'd still hope that a new system call can be defined in a way that you only need to have an assembly wrapper to save the full pt_regs, but no arch specific code to get the syscall arguments out of that again. In do_clone(), you need a pointer to pt_regs and the user stack pointer, but that can be generated from user_stack_pointer(regs). Does task_pt_regs(current) give the right pointer on all architectures or do we also need to pass the regs into the syscall? Arnd <>< _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/containers
