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unix: add Readv, Writev, Preadv, Pwritev for OpenBSD

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Add OpenBSD libc syscall wrappers for vectored I/O, and share the
existing Darwin wrapper implementation and tests.

Fixes golang/go#78049

Change-Id: Ie2743ef36a5cb73b05cc551c9c1108503f5992b6
Reviewed-on: https://go-review.googlesource.com/c/sys/+/771300
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
This commit is contained in:
Aaqa Ishtyaq
2026-05-12 12:53:07 -07:00
committed by Gopher Robot
parent fb1facd76f
commit 04396e85d4
18 changed files with 968 additions and 89 deletions
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unix/zsyscall_openbsd_riscv64.go
+84
View File
@@ -1633,6 +1633,90 @@ var libc_pwrite_trampoline_addr uintptr
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func readv(fd int, iovecs []Iovec) (n int, err error) {
var _p0 unsafe.Pointer
if len(iovecs) > 0 {
_p0 = unsafe.Pointer(&iovecs[0])
} else {
_p0 = unsafe.Pointer(&_zero)
}
r0, _, e1 := syscall_syscall(libc_readv_trampoline_addr, uintptr(fd), uintptr(_p0), uintptr(len(iovecs)))
n = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
var libc_readv_trampoline_addr uintptr
//go:cgo_import_dynamic libc_readv readv "libc.so"
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func writev(fd int, iovecs []Iovec) (n int, err error) {
var _p0 unsafe.Pointer
if len(iovecs) > 0 {
_p0 = unsafe.Pointer(&iovecs[0])
} else {
_p0 = unsafe.Pointer(&_zero)
}
r0, _, e1 := syscall_syscall(libc_writev_trampoline_addr, uintptr(fd), uintptr(_p0), uintptr(len(iovecs)))
n = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
var libc_writev_trampoline_addr uintptr
//go:cgo_import_dynamic libc_writev writev "libc.so"
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func preadv(fd int, iovecs []Iovec, offset int64) (n int, err error) {
var _p0 unsafe.Pointer
if len(iovecs) > 0 {
_p0 = unsafe.Pointer(&iovecs[0])
} else {
_p0 = unsafe.Pointer(&_zero)
}
r0, _, e1 := syscall_syscall6(libc_preadv_trampoline_addr, uintptr(fd), uintptr(_p0), uintptr(len(iovecs)), uintptr(offset), 0, 0)
n = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
var libc_preadv_trampoline_addr uintptr
//go:cgo_import_dynamic libc_preadv preadv "libc.so"
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func pwritev(fd int, iovecs []Iovec, offset int64) (n int, err error) {
var _p0 unsafe.Pointer
if len(iovecs) > 0 {
_p0 = unsafe.Pointer(&iovecs[0])
} else {
_p0 = unsafe.Pointer(&_zero)
}
r0, _, e1 := syscall_syscall6(libc_pwritev_trampoline_addr, uintptr(fd), uintptr(_p0), uintptr(len(iovecs)), uintptr(offset), 0, 0)
n = int(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
var libc_pwritev_trampoline_addr uintptr
//go:cgo_import_dynamic libc_pwritev pwritev "libc.so"
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
func read(fd int, p []byte) (n int, err error) {
var _p0 unsafe.Pointer
if len(p) > 0 {