From 0d6a7f9d2eb2e5e9b96cd1b144d122f6eb5aac81 Mon Sep 17 00:00:00 2001 From: Tobias Klauser Date: Fri, 26 Aug 2022 12:09:34 +0200 Subject: [PATCH] internal/poll, internal/syscall/unix, net, runtime: convert openbsd (except mips64) to direct libc calls Call libc wrappers directly rather than calling using syscall(2). Updates golang/go#36435 Change-Id: I40be410c7472f7d89cbec2ebdc7c841c7726ca4a Reviewed-on: https://go-review.googlesource.com/c/go/+/425637 Reviewed-by: David Chase Reviewed-by: Heschi Kreinick TryBot-Result: Gopher Robot Run-TryBot: Tobias Klauser Reviewed-by: Joel Sing --- src/internal/poll/fcntl_libc.go | 2 +- src/internal/poll/fcntl_syscall.go | 2 +- src/internal/syscall/unix/at.go | 2 +- src/internal/syscall/unix/at_fstatat.go | 2 +- .../unix/{at_darwin.go => at_libc2.go} | 2 ++ .../syscall/unix/getentropy_openbsd.go | 24 ++++++------------ .../syscall/unix/getentropy_openbsd_mips64.go | 25 +++++++++++++++++++ src/internal/syscall/unix/nonblocking.go | 2 +- src/internal/syscall/unix/nonblocking_libc.go | 2 +- src/net/fcntl_libc_test.go | 2 +- src/net/fcntl_syscall_test.go | 2 +- src/runtime/export_openbsd_test.go | 15 +++++++++++ src/runtime/nbpipe_fcntl_libc_test.go | 2 +- src/runtime/nbpipe_fcntl_unix_test.go | 2 +- 14 files changed, 60 insertions(+), 26 deletions(-) rename src/internal/syscall/unix/{at_darwin.go => at_libc2.go} (95%) create mode 100644 src/internal/syscall/unix/getentropy_openbsd_mips64.go create mode 100644 src/runtime/export_openbsd_test.go diff --git a/src/internal/poll/fcntl_libc.go b/src/internal/poll/fcntl_libc.go index 13614dc3e8d..529b8e123a8 100644 --- a/src/internal/poll/fcntl_libc.go +++ b/src/internal/poll/fcntl_libc.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -//go:build aix || darwin || solaris +//go:build aix || darwin || (openbsd && !mips64) || solaris package poll diff --git a/src/internal/poll/fcntl_syscall.go b/src/internal/poll/fcntl_syscall.go index accff5e0438..bbfc8a8be50 100644 --- a/src/internal/poll/fcntl_syscall.go +++ b/src/internal/poll/fcntl_syscall.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -//go:build dragonfly || freebsd || linux || netbsd || openbsd +//go:build dragonfly || freebsd || linux || netbsd || (openbsd && mips64) package poll diff --git a/src/internal/syscall/unix/at.go b/src/internal/syscall/unix/at.go index 965162e3d2f..876ca9ff578 100644 --- a/src/internal/syscall/unix/at.go +++ b/src/internal/syscall/unix/at.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -//go:build linux || openbsd || netbsd || dragonfly +//go:build dragonfly || linux || netbsd || (openbsd && mips64) package unix diff --git a/src/internal/syscall/unix/at_fstatat.go b/src/internal/syscall/unix/at_fstatat.go index 25318d20149..8f25fe9f64e 100644 --- a/src/internal/syscall/unix/at_fstatat.go +++ b/src/internal/syscall/unix/at_fstatat.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -//go:build (linux && !loong64) || openbsd || netbsd || dragonfly +//go:build dragonfly || (linux && !loong64) || netbsd || (openbsd && mips64) package unix diff --git a/src/internal/syscall/unix/at_darwin.go b/src/internal/syscall/unix/at_libc2.go similarity index 95% rename from src/internal/syscall/unix/at_darwin.go rename to src/internal/syscall/unix/at_libc2.go index a88a27e0c6c..93d0cf4443f 100644 --- a/src/internal/syscall/unix/at_darwin.go +++ b/src/internal/syscall/unix/at_libc2.go @@ -2,6 +2,8 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. +//go:build darwin || (openbsd && !mips64) + package unix import ( diff --git a/src/internal/syscall/unix/getentropy_openbsd.go b/src/internal/syscall/unix/getentropy_openbsd.go index d5caa8095a6..ad0914da903 100644 --- a/src/internal/syscall/unix/getentropy_openbsd.go +++ b/src/internal/syscall/unix/getentropy_openbsd.go @@ -1,25 +1,17 @@ -// Copyright 2016 The Go Authors. All rights reserved. +// Copyright 2022 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. +//go:build openbsd && !mips64 + package unix -import ( - "syscall" - "unsafe" -) - -// getentropy(2)'s syscall number, from /usr/src/sys/kern/syscalls.master -const entropyTrap uintptr = 7 +import _ "unsafe" // for linkname // GetEntropy calls the OpenBSD getentropy system call. func GetEntropy(p []byte) error { - _, _, errno := syscall.Syscall(entropyTrap, - uintptr(unsafe.Pointer(&p[0])), - uintptr(len(p)), - 0) - if errno != 0 { - return errno - } - return nil + return getentropy(p) } + +//go:linkname getentropy syscall.getentropy +func getentropy(p []byte) error diff --git a/src/internal/syscall/unix/getentropy_openbsd_mips64.go b/src/internal/syscall/unix/getentropy_openbsd_mips64.go new file mode 100644 index 00000000000..d5caa8095a6 --- /dev/null +++ b/src/internal/syscall/unix/getentropy_openbsd_mips64.go @@ -0,0 +1,25 @@ +// Copyright 2016 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" +) + +// getentropy(2)'s syscall number, from /usr/src/sys/kern/syscalls.master +const entropyTrap uintptr = 7 + +// GetEntropy calls the OpenBSD getentropy system call. +func GetEntropy(p []byte) error { + _, _, errno := syscall.Syscall(entropyTrap, + uintptr(unsafe.Pointer(&p[0])), + uintptr(len(p)), + 0) + if errno != 0 { + return errno + } + return nil +} diff --git a/src/internal/syscall/unix/nonblocking.go b/src/internal/syscall/unix/nonblocking.go index 9e5f0fb4a2d..a0becd1e01e 100644 --- a/src/internal/syscall/unix/nonblocking.go +++ b/src/internal/syscall/unix/nonblocking.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -//go:build dragonfly || freebsd || linux || netbsd || openbsd +//go:build dragonfly || freebsd || linux || netbsd || (openbsd && mips64) package unix diff --git a/src/internal/syscall/unix/nonblocking_libc.go b/src/internal/syscall/unix/nonblocking_libc.go index 84940714c3c..bff66849623 100644 --- a/src/internal/syscall/unix/nonblocking_libc.go +++ b/src/internal/syscall/unix/nonblocking_libc.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -//go:build aix || darwin || solaris +//go:build aix || darwin || (openbsd && !mips64) || solaris package unix diff --git a/src/net/fcntl_libc_test.go b/src/net/fcntl_libc_test.go index 78892e3a9fa..5858865cf0a 100644 --- a/src/net/fcntl_libc_test.go +++ b/src/net/fcntl_libc_test.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -//go:build aix || darwin || solaris +//go:build aix || darwin || (openbsd && !mips64) || solaris package net diff --git a/src/net/fcntl_syscall_test.go b/src/net/fcntl_syscall_test.go index 2d1f7e22a45..b9ac1d3effd 100644 --- a/src/net/fcntl_syscall_test.go +++ b/src/net/fcntl_syscall_test.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -//go:build dragonfly || freebsd || linux || netbsd || openbsd +//go:build dragonfly || freebsd || linux || netbsd || (openbsd && mips64) package net diff --git a/src/runtime/export_openbsd_test.go b/src/runtime/export_openbsd_test.go new file mode 100644 index 00000000000..ef680dc2821 --- /dev/null +++ b/src/runtime/export_openbsd_test.go @@ -0,0 +1,15 @@ +// Copyright 2022 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. + +//go:build openbsd && !mips64 + +package runtime + +func Fcntl(fd, cmd, arg uintptr) (uintptr, uintptr) { + r := fcntl(int32(fd), int32(cmd), int32(arg)) + if r < 0 { + return ^uintptr(0), uintptr(-r) + } + return uintptr(r), 0 +} diff --git a/src/runtime/nbpipe_fcntl_libc_test.go b/src/runtime/nbpipe_fcntl_libc_test.go index a9c8987438d..170245defec 100644 --- a/src/runtime/nbpipe_fcntl_libc_test.go +++ b/src/runtime/nbpipe_fcntl_libc_test.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -//go:build aix || darwin || solaris +//go:build aix || darwin || (openbsd && !mips64) || solaris package runtime_test diff --git a/src/runtime/nbpipe_fcntl_unix_test.go b/src/runtime/nbpipe_fcntl_unix_test.go index 97607fa2cf7..b7252ea9faf 100644 --- a/src/runtime/nbpipe_fcntl_unix_test.go +++ b/src/runtime/nbpipe_fcntl_unix_test.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -//go:build dragonfly || freebsd || linux || netbsd || openbsd +//go:build dragonfly || freebsd || linux || netbsd || (openbsd && mips64) package runtime_test