Re: [PATCH x86/mm 6/6] x86-64 ia32 ptrace get/putreg32 currenttask

[Roland McGrath]

> But the ones that do the same thing for fs/es/ds are *not*. Those three 
> registers are kernel mode registers (ds/es are the regular kernel data 
> segment, fs is the per-cpu data segment), and restored on return to user 
> space from the stack.

Um, really?  This is x86-64 code.  AIUI those values don't have any effect
at all in 64-bit mode (as the kernel is).  I haven't found any code in
entry_64.S or ia32entry.S that touches them.  __switch_to uses direct
access to the segment registers just as I've done.


Thanks,
Roland
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