internal/poll, internal/syscall/unix, syscall: move writev definition for solaris

Move the writev definition for solaris from package
internal/syscall/unix to package syscall. This corresponds to where
writev is defined on aix, darwin and openbsd as well and is
go:linkname'ed from internal/poll. This also allows updating the
generated wrappers more easily if needed.

Change-Id: I671ed8232d25319f8e63f549f786d77a17602148
Reviewed-on: https://go-review.googlesource.com/c/go/+/436597
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>

1 files changed, 0 insertions, 28 deletions

diff --git a/src/internal/syscall/unix/writev_solaris.go b/src/internal/syscall/unix/writev_solaris.go
deleted file mode 100644
index d4895eef9e..0000000000
--- a/src/internal/syscall/unix/writev_solaris.go
+++ /dev/null
@@ -1,28 +0,0 @@
-// Copyright 2020 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package unix
-
-import (
-	"syscall"
-	"unsafe"
-)
-
-//go:cgo_import_dynamic libc_writev writev "libc.so"
-
-//go:linkname procwritev libc_writev
-
-var procwritev uintptr
-
-func Writev(fd int, iovs []syscall.Iovec) (uintptr, error) {
-	var p *syscall.Iovec
-	if len(iovs) > 0 {
-		p = &iovs[0]
-	}
-	n, _, errno := syscall6(uintptr(unsafe.Pointer(&procwritev)), 3, uintptr(fd), uintptr(unsafe.Pointer(p)), uintptr(len(iovs)), 0, 0, 0)
-	if errno != 0 {
-		return 0, errno
-	}
-	return n, nil
-}