tree 96a9d7b862f4971426f7b7f7ce6c4fd80766fd7e
parent 57e459e02b4b01567f92542f92cd9afde209e193
author Ian Lance Taylor <iant@golang.org> 1467934889 -0700
committer Chris Broadfoot <cbro@golang.org> 1468851574 +0000

[release-branch.go1.6] runtime: fix nanotime for macOS Sierra

In the beta version of the macOS Sierra (10.12) release, the
gettimeofday system call changed on x86. Previously it always returned
the time in the AX/DX registers. Now, if AX is returned as 0, it means
that the system call has stored the values into the memory pointed to by
the first argument, just as the libc gettimeofday function does. The
libc function handles both cases, and we need to do so as well.

Fixes #16272.
Fixes #16354.

Change-Id: Ibe5ad50a2c5b125e92b5a4e787db4b5179f6b723
Reviewed-on: https://go-review.googlesource.com/24812
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-on: https://go-review.googlesource.com/24967