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. -- 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
