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syscall: exec_linux.go: support platforms without SYS_DUP2

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Updates #9974

This change is in preparation for merging the arm64 platform.

Arm64 does not support SYS_DUP2 at all, so define a new constant to be
the minimum dup(2) version supported. This constant defaults to SYS_DUP2
on all existing platforms.

Change-Id: If405878105082c7c880f8541c1491970124c9ce4
Reviewed-on: https://go-review.googlesource.com/7123
Reviewed-by: Minux Ma <minux@golang.org>
Run-TryBot: Minux Ma <minux@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Dave Cheney <dave@cheney.net>
This commit is contained in:
Dave Cheney 2015-03-09 07:03:00 +11:00
parent f00c19add5
commit 532bc5f11c
5 changed files with 11 additions and 3 deletions
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2
src/syscall/syscall_linux_arm.go
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@ -6,6 +6,8 @@ package syscall
import "unsafe"
const _SYS_dup = SYS_DUP2
func Getpagesize() int { return 4096 }
func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) }