David Miller writes: > From: Mikael Pettersson <mikpelinux@xxxxxxxxx> > Date: Sat, 7 May 2016 17:50:32 +0200 > > > What is the approved way of accessing the stacked FPU state from a > > SIGFPE handler (sigaction + SA_SIGINFO) in a 32-bit process? I need > > to update parts of that state. > > > > The third parameter to the handler is a sigcontext pointer, but the > > struct ends just before the stacked fpu_save pointer. Also, the type > > that fpu_save points to doesn't appear to be defined by glibc's headers. > > > > I could duplicate the kernel's types (32-bit __siginfo_fpu_t and struct > > rt_signal_frame), but that feels a bit unsafe unless there's a statement > > that they form a de-facto ABI. > > You can be sure the on-stack signal saved state layout won't change, > otherwise gdb, exception unwinding, and a host of other things would > break. Thanks, that works for me. -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
