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runtime: fix nanotime for macOS Sierra, again.

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macOS Sierra beta4 changed the kernel interface for getting time.
DX now optionally points to an address for additional info.
Set it to zero to avoid corrupting memory.

Fixes #16570

Change-Id: I9f537e552682045325cdbb68b7d0b4ddafade14a
Reviewed-on: https://go-review.googlesource.com/25400
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Quentin Smith <quentin@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Brad Fitzpatrick 2016-08-01 21:54:40 -07:00
parent 6317c213c9
commit 2da5633eb9
2 changed files with 5 additions and 3 deletions
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7
src/runtime/sys_darwin_386.s
View File

@ -196,15 +196,16 @@ timeloop:
systime:
// Fall back to system call (usually first call in this thread)
LEAL 12(SP), AX // must be non-nil, unused
LEAL 16(SP), AX // must be non-nil, unused
MOVL AX, 4(SP)
MOVL $0, 8(SP) // time zone pointer
MOVL $0, 12(SP) // required as of Sierra; Issue 16570
MOVL $116, AX
INT $0x80
CMPL AX, $0
JNE inreg
MOVL 12(SP), AX
MOVL 16(SP), DX
MOVL 16(SP), AX
MOVL 20(SP), DX
inreg:
// sec is in AX, usec in DX
// convert to DX:AX nsec

1
src/runtime/sys_darwin_amd64.s
View File

@ -157,6 +157,7 @@ systime:
// Fall back to system call (usually first call in this thread).
MOVQ SP, DI
MOVQ $0, SI
MOVQ $0, DX // required as of Sierra; Issue 16570
MOVL $(0x2000000+116), AX
SYSCALL
CMPQ AX, $0