In glibc, we have some code that copies the DT_SONAME string of the
kernel vDSO into the heap, commented this way:
/* Work around a kernel problem. The kernel cannot handle
addresses in the vsyscall DSO pages in writev() calls. */
Is this really a problem anymore? vDSO addresses are ordinary userspace
addresses, I think. (The vsyscall stuff is very different, of course,
and maybe the vDSO started out the same way.)
We only care about Linux 3.2 or later in glibc.
Thanks,
Florian
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