mirror of
https://github.com/golang/go
synced 2024-11-19 21:54:40 -07:00
519474451a
This is a subset of https://golang.org/cl/20022 with only the copyright header lines, so the next CL will be smaller and more reviewable. Go policy has been single space after periods in comments for some time. The copyright header template at: https://golang.org/doc/contribute.html#copyright also uses a single space. Make them all consistent. Change-Id: Icc26c6b8495c3820da6b171ca96a74701b4a01b0 Reviewed-on: https://go-review.googlesource.com/20111 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
287 lines
7.4 KiB
Go
287 lines
7.4 KiB
Go
// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package runtime
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import "unsafe"
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var (
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libc_chdir,
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libc_chroot,
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libc_execve,
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libc_fcntl,
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libc_forkx,
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libc_gethostname,
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libc_getpid,
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libc_ioctl,
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libc_pipe,
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libc_setgid,
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libc_setgroups,
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libc_setsid,
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libc_setuid,
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libc_setpgid,
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libc_syscall,
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libc_wait4,
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pipe1 libcFunc
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)
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//go:nosplit
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func syscall_sysvicall6(fn, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) {
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call := libcall{
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fn: fn,
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n: nargs,
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args: uintptr(unsafe.Pointer(&a1)),
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}
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entersyscallblock(0)
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asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
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exitsyscall(0)
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return call.r1, call.r2, call.err
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}
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//go:nosplit
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func syscall_rawsysvicall6(fn, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) {
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call := libcall{
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fn: fn,
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n: nargs,
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args: uintptr(unsafe.Pointer(&a1)),
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}
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asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
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return call.r1, call.r2, call.err
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}
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// TODO(aram): Once we remove all instances of C calling sysvicallN, make
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// sysvicallN return errors and replace the body of the following functions
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// with calls to sysvicallN.
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//go:nosplit
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func syscall_chdir(path uintptr) (err uintptr) {
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call := libcall{
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fn: uintptr(unsafe.Pointer(&libc_chdir)),
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n: 1,
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args: uintptr(unsafe.Pointer(&path)),
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}
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asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
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return call.err
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}
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//go:nosplit
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func syscall_chroot(path uintptr) (err uintptr) {
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call := libcall{
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fn: uintptr(unsafe.Pointer(&libc_chroot)),
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n: 1,
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args: uintptr(unsafe.Pointer(&path)),
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}
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asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
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return call.err
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}
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// like close, but must not split stack, for forkx.
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//go:nosplit
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func syscall_close(fd int32) int32 {
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return int32(sysvicall1(&libc_close, uintptr(fd)))
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}
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//go:nosplit
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func syscall_execve(path, argv, envp uintptr) (err uintptr) {
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call := libcall{
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fn: uintptr(unsafe.Pointer(&libc_execve)),
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n: 3,
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args: uintptr(unsafe.Pointer(&path)),
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}
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asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
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return call.err
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}
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// like exit, but must not split stack, for forkx.
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//go:nosplit
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func syscall_exit(code uintptr) {
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sysvicall1(&libc_exit, code)
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}
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//go:nosplit
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func syscall_fcntl(fd, cmd, arg uintptr) (val, err uintptr) {
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call := libcall{
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fn: uintptr(unsafe.Pointer(&libc_fcntl)),
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n: 3,
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args: uintptr(unsafe.Pointer(&fd)),
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}
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asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
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return call.r1, call.err
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}
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//go:nosplit
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func syscall_forkx(flags uintptr) (pid uintptr, err uintptr) {
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call := libcall{
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fn: uintptr(unsafe.Pointer(&libc_forkx)),
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n: 1,
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args: uintptr(unsafe.Pointer(&flags)),
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}
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asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
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return call.r1, call.err
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}
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func syscall_gethostname() (name string, err uintptr) {
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cname := new([_MAXHOSTNAMELEN]byte)
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var args = [2]uintptr{uintptr(unsafe.Pointer(&cname[0])), _MAXHOSTNAMELEN}
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call := libcall{
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fn: uintptr(unsafe.Pointer(&libc_gethostname)),
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n: 2,
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args: uintptr(unsafe.Pointer(&args[0])),
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}
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entersyscallblock(0)
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asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
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exitsyscall(0)
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if call.r1 != 0 {
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return "", call.err
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}
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cname[_MAXHOSTNAMELEN-1] = 0
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return gostringnocopy(&cname[0]), 0
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}
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//go:nosplit
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func syscall_getpid() (pid, err uintptr) {
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call := libcall{
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fn: uintptr(unsafe.Pointer(&libc_getpid)),
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n: 0,
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args: uintptr(unsafe.Pointer(&libc_getpid)), // it's unused but must be non-nil, otherwise crashes
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}
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asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
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return call.r1, call.err
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}
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//go:nosplit
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func syscall_ioctl(fd, req, arg uintptr) (err uintptr) {
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call := libcall{
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fn: uintptr(unsafe.Pointer(&libc_ioctl)),
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n: 3,
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args: uintptr(unsafe.Pointer(&fd)),
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}
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asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
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return call.err
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}
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func syscall_pipe() (r, w, err uintptr) {
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call := libcall{
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fn: uintptr(unsafe.Pointer(&pipe1)),
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n: 0,
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args: uintptr(unsafe.Pointer(&pipe1)), // it's unused but must be non-nil, otherwise crashes
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}
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entersyscallblock(0)
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asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
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exitsyscall(0)
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return call.r1, call.r2, call.err
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}
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// This is syscall.RawSyscall, it exists to satisfy some build dependency,
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// but it doesn't work correctly.
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//
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// DO NOT USE!
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//
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// TODO(aram): make this panic once we stop calling fcntl(2) in net using it.
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func syscall_rawsyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
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call := libcall{
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fn: uintptr(unsafe.Pointer(&libc_syscall)),
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n: 4,
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args: uintptr(unsafe.Pointer(&trap)),
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}
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asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
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return call.r1, call.r2, call.err
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}
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//go:nosplit
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func syscall_setgid(gid uintptr) (err uintptr) {
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call := libcall{
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fn: uintptr(unsafe.Pointer(&libc_setgid)),
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n: 1,
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args: uintptr(unsafe.Pointer(&gid)),
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}
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asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
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return call.err
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}
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//go:nosplit
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func syscall_setgroups(ngid, gid uintptr) (err uintptr) {
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call := libcall{
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fn: uintptr(unsafe.Pointer(&libc_setgroups)),
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n: 2,
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args: uintptr(unsafe.Pointer(&ngid)),
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}
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asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
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return call.err
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}
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//go:nosplit
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func syscall_setsid() (pid, err uintptr) {
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call := libcall{
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fn: uintptr(unsafe.Pointer(&libc_setsid)),
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n: 0,
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args: uintptr(unsafe.Pointer(&libc_setsid)), // it's unused but must be non-nil, otherwise crashes
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}
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asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
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return call.r1, call.err
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}
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//go:nosplit
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func syscall_setuid(uid uintptr) (err uintptr) {
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call := libcall{
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fn: uintptr(unsafe.Pointer(&libc_setuid)),
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n: 1,
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args: uintptr(unsafe.Pointer(&uid)),
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}
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asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
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return call.err
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}
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//go:nosplit
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func syscall_setpgid(pid, pgid uintptr) (err uintptr) {
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call := libcall{
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fn: uintptr(unsafe.Pointer(&libc_setpgid)),
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n: 2,
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args: uintptr(unsafe.Pointer(&pid)),
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}
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asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
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return call.err
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}
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// This is syscall.Syscall, it exists to satisfy some build dependency,
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// but it doesn't work correctly.
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//
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// DO NOT USE!
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//
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// TODO(aram): make this panic once we stop calling fcntl(2) in net using it.
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func syscall_syscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
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call := libcall{
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fn: uintptr(unsafe.Pointer(&libc_syscall)),
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n: 4,
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args: uintptr(unsafe.Pointer(&trap)),
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}
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entersyscallblock(0)
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asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
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exitsyscall(0)
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return call.r1, call.r2, call.err
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}
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func syscall_wait4(pid uintptr, wstatus *uint32, options uintptr, rusage unsafe.Pointer) (wpid int, err uintptr) {
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call := libcall{
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fn: uintptr(unsafe.Pointer(&libc_wait4)),
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n: 4,
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args: uintptr(unsafe.Pointer(&pid)),
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}
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entersyscallblock(0)
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asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
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exitsyscall(0)
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return int(call.r1), call.err
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}
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//go:nosplit
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func syscall_write(fd, buf, nbyte uintptr) (n, err uintptr) {
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call := libcall{
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fn: uintptr(unsafe.Pointer(&libc_write)),
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n: 3,
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args: uintptr(unsafe.Pointer(&fd)),
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}
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asmcgocall(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
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return call.r1, call.err
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}
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