diff options
| author | Richard Weinberger <richard@nod.at> | 2011-07-25 17:12:54 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-07-25 20:57:13 -0700 |
| commit | f1c2bb8b9964ed31de988910f8b1cfb586d30091 (patch) | |
| tree | ccf58acd47dbf659dca3087b7ebf2704ffd14aba /arch/um/sys-x86_64/vdso/vdso.S | |
| parent | fc9a00187ba1300a0baae8e613cc62598e1a7de7 (diff) | |
| download | talos-op-linux-f1c2bb8b9964ed31de988910f8b1cfb586d30091.tar.gz talos-op-linux-f1c2bb8b9964ed31de988910f8b1cfb586d30091.zip | |
um: implement a x86_64 vDSO
Until now UML had no x86_64 vDSO. So glibc always used the vsyscall page
for gettimeday() and friends. Calls to gettimeday() returned falsely the
host time and confused some programs.
This patch adds a vDSO which turns all __vdso_* calls into a system call
so that UML can trap them.
As glibc still uses the vsyscall page for static binaries this patch
improves the situation only for dynamic binaries.
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um/sys-x86_64/vdso/vdso.S')
| -rw-r--r-- | arch/um/sys-x86_64/vdso/vdso.S | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/um/sys-x86_64/vdso/vdso.S b/arch/um/sys-x86_64/vdso/vdso.S new file mode 100644 index 000000000000..ec82c1686bd6 --- /dev/null +++ b/arch/um/sys-x86_64/vdso/vdso.S @@ -0,0 +1,10 @@ +#include <linux/init.h> + +__INITDATA + + .globl vdso_start, vdso_end +vdso_start: + .incbin "arch/um/sys-x86_64/vdso/vdso.so" +vdso_end: + +__FINIT |
