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alistair23-linux/arch/arm64/include/asm/vdso
Thomas Gleixner 33a58980ff arm64: compat: vdso: Use legacy syscalls as fallback
The generic VDSO implementation uses the Y2038 safe clock_gettime64() and
clock_getres_time64() syscalls as fallback for 32bit VDSO. This breaks
seccomp setups because these syscalls might be not (yet) allowed.

Implement the 32bit variants which use the legacy syscalls and select the
variant in the core library.

The 64bit time variants are not removed because they are required for the
time64 based vdso accessors.

Fixes: 00b26474c2 ("lib/vdso: Provide generic VDSO implementation")
Reported-by: Sean Christopherson <sean.j.christopherson@intel.com>
Reported-by: Paul Bolle <pebolle@tiscali.nl>
Suggested-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Link: https://lkml.kernel.org/r/20190728131648.971361611@linutronix.de
2019-07-31 00:09:10 +02:00
..
compat_barrier.h arm64: compat: No need for pre-ARMv7 barriers on an ARMv8 system 2019-06-26 07:28:10 +02:00
compat_gettimeofday.h arm64: compat: vdso: Use legacy syscalls as fallback 2019-07-31 00:09:10 +02:00
gettimeofday.h arm64: Fix __arch_get_hw_counter() implementation 2019-06-26 14:26:54 +02:00
vsyscall.h arm64: vdso: Substitute gettimeofday() with C implementation 2019-06-22 21:21:06 +02:00