• Jeff Dike's avatar
    [PATCH] uml: Move signal handlers to arch code · 4b84c69b
    Jeff Dike authored
    Have most signals go through an arch-provided handler which recovers the
    sigcontext and then calls a generic handler.  This replaces the
    ARCH_GET_SIGCONTEXT macro, which was somewhat fragile.  On x86_64, recovering
    %rdx (which holds the sigcontext pointer) must be the first thing that
    happens.  sig_handler duly invokes that first, but there is no guarantee that
    I can see that instructions won't be reordered such that %rdx is used before
    that.  Having the arch provide the handler seems much more robust.
    
    Some signals in some parts of UML require their own handlers - these places
    don't call set_handler any more.  They call sigaction or signal themselves.
    Signed-off-by: default avatarJeff Dike <jdike@addtoit.com>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    4b84c69b
Makefile 196 Bytes