On 03/08/2017 09:10 PM, Joseph Myers wrote:
On Wed, 8 Mar 2017, Albert ARIBAUD wrote:
IIUC, on the kernel side there is a will to move away from Posix (1)
here and just make tv_nsec 64-bits with no padding when time_t is
64-bit.
In that case, that simply means it's glibc's responsibility to avoid the
x32 mistake, and copy timespec values passed to the kernel to clear
padding while staying compatible with POSIX. (Which would probably also
provide the infrastructure required to fix the x32 bug in glibc along the
lines used in musl.)
That's not going to work because struct timespec can be hidden in ioctl
arguments, ancillary data (cmsg), and Netlink messages. It's an uphill
battle to lie to userspace about the kernel ABI, so we really shouldn't
do that.
Thanks,
Florian
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