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| author | Chris Metcalf <cmetcalf@tilera.com> | 2013-08-07 21:33:32 +0200 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@tilera.com> | 2013-08-13 22:26:21 +0200 |
| commit | 4a556f4f56da3110b27e265b79f0e7582115445c (patch) | |
| tree | f5af0b865c867160855e4722b49d7e850dddf944 /arch/tile/kernel/signal.c | |
| parent | tile: support simulator notification for ET_DYN objects (diff) | |
| download | linux-4a556f4f56da3110b27e265b79f0e7582115445c.tar.xz linux-4a556f4f56da3110b27e265b79f0e7582115445c.zip | |
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/signal.c')
| -rw-r--r-- | arch/tile/kernel/signal.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/tile/kernel/signal.c b/arch/tile/kernel/signal.c index 9531845bf661..2d1dbf38a9ab 100644 --- a/arch/tile/kernel/signal.c +++ b/arch/tile/kernel/signal.c @@ -33,6 +33,7 @@ #include <asm/ucontext.h> #include <asm/sigframe.h> #include <asm/syscalls.h> +#include <asm/vdso.h> #include <arch/interrupts.h> #define DEBUG_SIG 0 @@ -190,7 +191,7 @@ static int 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 = (unsigned long) ka->sa.sa_restorer; |