[PATCH v7 8/9] ARM: vdso initialization, mapping, and synchronization

On Tue, Jul 01, 2014 at 07:09:46AM -0700, Andy Lutomirski wrote:

On Tue, Jul 1, 2014 at 7:01 AM, Nathan Lynch [off-list ref] wrote:

quoted

Hmm, which tools?  Shouldn't they be consulting AT_SYSINFO_EHDR in the
auxiliary vector instead?

There were a bunch of random things written before getauxvec(3) was
introduced that look for "[vdso]"

gdb is also a bit weird.  I think it's changed a couple times, but
IIRC it looks for a vma that has a start address that matches
AT_SYSINFO_EDHR, and then it parses the ELF header and *section*
headers (sigh) in that vma.  So if I'm remembering correctly, it just
won't notice the vdso at all of AT_SYSINFO_EHDR and the vma start
aren't the same.

Hmm, that would explain the weird error I got when trying gdb with the
vdso in place.

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