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linux/arch/um/sys-x86_64/vdso/vdso.S
Richard Weinberger f1c2bb8b99 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>
2011-07-25 20:57:13 -07:00

11 lines
140 B
ArmAsm

#include <linux/init.h>
__INITDATA
.globl vdso_start, vdso_end
vdso_start:
.incbin "arch/um/sys-x86_64/vdso/vdso.so"
vdso_end:
__FINIT