mirror of
https://github.com/golang/go
synced 2024-11-14 09:10:27 -07:00
2858b73843
In preparation for rename of cgocall_errno into cgocall and asmcgocall_errno into asmcgocall in the fllowinng CL. rsc requested CL 9387 to be split into two parts. This is first part. Change-Id: I7434f0e4b44dd37017540695834bfcb1eebf0b2f Reviewed-on: https://go-review.googlesource.com/11166 Reviewed-by: Ian Lance Taylor <iant@golang.org>
287 lines
7.5 KiB
Go
287 lines
7.5 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_errno(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_errno(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_errno(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_errno(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_errno(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_errno(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_errno(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_errno(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_errno(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_errno(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_errno(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_errno(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_errno(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_errno(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_errno(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_errno(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_errno(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_errno(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_errno(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_errno(unsafe.Pointer(&asmsysvicall6), unsafe.Pointer(&call))
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return call.r1, call.err
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}
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