linux/arch/tile/kernel/vdso, branch v3.13Linux kernel source treehttps://git.amat.us/linux/atom/arch/tile/kernel/vdso?h=v3.132013-08-13T20:26:21Ztile: implement gettimeofday() via vDSO2013-08-13T20:26:21ZChris Metcalfcmetcalf@tilera.com2013-08-07T19:33:32Zurn:sha1:4a556f4f56da3110b27e265b79f0e7582115445c
This change creates the framework for vDSO calls, makes the existing
rt_sigreturn() mechanism use it, and adds a fast gettimeofday().
Now that we need to expose the vDSO address to userspace, we add
AT_SYSINFO_EHDR to the set of aux entries provided to userspace.
(You can disable any extra vDSO support by booting with vdso=0,
but the rt_sigreturn vDSO page will still be provided.)
Note that glibc has supported the tile vDSO since release 2.17.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>