Messages in this thread | | | Date | Thu, 05 Apr 2007 08:53:23 -0700 | From | Jeremy Fitzhardinge <> | Subject | [patch 0/2] Updates to compat VDSOs |
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Hi Andi,
Here's a couple of patches to fix up COMPAT_VDSO:
The first is a straightforward implementation of Jan's original idea of relocating the VDSO to match its mapped location. Unlike Jan and Zach's version, I changed it to relocate based on the phdrs rather than the sections; the result is pleasantly compact.
The second patch takes advantage of the fact that all the COMPAT_VDSO work happens at runtime now, and allows compat mode to be enabled dynamically. If you specify vdso=2 on the kernel command line, it comes up in compat mode; vdso=1 is normal vdso mode, and vdso=0 disables vdso altogether. You can also switch modes with sysctl.
Changes since last posting: - rebase sections as well as phdrs - relocate symbols - more robust DT_tag handling - handle dynamic compat mode switches a bit better
Thanks to Jan and Roland for the review.
Thanks, J
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