• Bodo Stroesser's avatar
    [PATCH] uml: S390 preparation, peekusr/pokeusr defined by subarch · 82c1c11b
    Bodo Stroesser authored
    s390 needs to change some parts of arch/um/kernel/ptrace.c.  Thus, the code
    regarding PEEKUSER and POKEUSER are shifted to arch/um/sys-<subarch>/ptrace.c.
    
    Also s390 debug registers need to be updated, when singlestepping is switched
    on / off.  Thus, setting/resetting of singlestepping is centralized in the new
    function set_singlestep(), which also inserts the macro
    SUBARCH_SET_SINGLESTEP(mode), if defined.
    
    Finally, s390 has the "ieee_instruction_pointer" in its
    registers, which also is allowed to be read via
    
      ptrace( PTRACE_PEEKUSER, getpid(), PT_IEEE_IP, 0);
    
    To implement this feature, sys_ptrace inserts the macro
    SUBARCH_PTRACE_SPECIAL, if defined.
    Signed-off-by: default avatarBodo Stroesser <bstroesser@fujitsu-siemens.com>
    Signed-off-by: default avatarJeff Dike <jdike@addtoit.com>
    Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    82c1c11b
ptrace.c 3.9 KB