1. 22 10月, 2014 5 次提交
  2. 20 10月, 2014 34 次提交
  3. 19 10月, 2014 1 次提交
    • D
      sparc64: Do not define thread fpregs save area as zero-length array. · e2653143
      David S. Miller 提交于
      This breaks the stack end corruption detection facility.
      
      What that facility does it write a magic value to "end_of_stack()"
      and checking to see if it gets overwritten.
      
      "end_of_stack()" is "task_thread_info(p) + 1", which for sparc64 is
      the beginning of the FPU register save area.
      
      So once the user uses the FPU, the magic value is overwritten and the
      debug checks trigger.
      
      Fix this by making the size explicit.
      
      Due to the size we use for the fpsaved[], gsr[], and xfsr[] arrays we
      are limited to 7 levels of FPU state saves.  So each FPU register set
      is 256 bytes, allocate 256 * 7 for the fpregs area.
      Reported-by: NMeelis Roos <mroos@linux.ee>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      e2653143