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| author | Chris Metcalf <cmetcalf@tilera.com> | 2013-08-07 15:33:32 -0400 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@tilera.com> | 2013-08-13 16:26:21 -0400 |
| commit | 4a556f4f56da3110b27e265b79f0e7582115445c (patch) | |
| tree | f5af0b865c867160855e4722b49d7e850dddf944 /arch/tile/kernel/compat_signal.c | |
| parent | 0c1d1917c547c8e787fb58e20e2de577453c980c (diff) | |
| download | linux-4a556f4f56da3110b27e265b79f0e7582115445c.tar.bz2 | |
tile: implement gettimeofday() via vDSO
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>
Diffstat (limited to 'arch/tile/kernel/compat_signal.c')
| -rw-r--r-- | arch/tile/kernel/compat_signal.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/tile/kernel/compat_signal.c b/arch/tile/kernel/compat_signal.c index d0a052e725be..85e00b2f39bf 100644 --- a/arch/tile/kernel/compat_signal.c +++ b/arch/tile/kernel/compat_signal.c @@ -32,6 +32,7 @@ #include <asm/ucontext.h> #include <asm/sigframe.h> #include <asm/syscalls.h> +#include <asm/vdso.h> #include <arch/interrupts.h> struct compat_ucontext { @@ -227,7 +228,7 @@ int compat_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, if (err) goto give_sigsegv; - restorer = VDSO_BASE; + restorer = VDSO_SYM(&__vdso_rt_sigreturn); if (ka->sa.sa_flags & SA_RESTORER) restorer = ptr_to_compat_reg(ka->sa.sa_restorer); |