mirror of
https://github.com/golang/go
synced 2024-10-04 19:21:21 -06:00
300 lines
8.4 KiB
Go
300 lines
8.4 KiB
Go
|
// 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 syscall
|
||
|
|
||
|
import "unsafe"
|
||
|
|
||
|
const (
|
||
|
_SYS_dup = SYS_DUP2
|
||
|
_SYS_getdents = SYS_GETDENTS64
|
||
|
)
|
||
|
|
||
|
//sys Dup2(oldfd int, newfd int) (err error)
|
||
|
//sys Fchown(fd int, uid int, gid int) (err error)
|
||
|
//sys Fstat(fd int, stat *Stat_t) (err error)
|
||
|
//sys Fstatfs(fd int, buf *Statfs_t) (err error)
|
||
|
//sys Ftruncate(fd int, length int64) (err error)
|
||
|
//sysnb Getegid() (egid int)
|
||
|
//sysnb Geteuid() (euid int)
|
||
|
//sysnb Getgid() (gid int)
|
||
|
//sysnb Getrlimit(resource int, rlim *Rlimit) (err error) = SYS_GETRLIMIT
|
||
|
//sysnb Getuid() (uid int)
|
||
|
//sysnb InotifyInit() (fd int, err error)
|
||
|
//sys Lchown(path string, uid int, gid int) (err error)
|
||
|
//sys Lstat(path string, stat *Stat_t) (err error)
|
||
|
//sys Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
|
||
|
//sys Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
|
||
|
//sys Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
|
||
|
//sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error)
|
||
|
//sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
|
||
|
//sys Setfsgid(gid int) (err error)
|
||
|
//sys Setfsuid(uid int) (err error)
|
||
|
//sysnb Setregid(rgid int, egid int) (err error)
|
||
|
//sysnb Setresgid(rgid int, egid int, sgid int) (err error)
|
||
|
//sysnb Setresuid(ruid int, euid int, suid int) (err error)
|
||
|
//sysnb Setrlimit(resource int, rlim *Rlimit) (err error)
|
||
|
//sysnb Setreuid(ruid int, euid int) (err error)
|
||
|
//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
|
||
|
//sys Stat(path string, stat *Stat_t) (err error)
|
||
|
//sys Statfs(path string, buf *Statfs_t) (err error)
|
||
|
//sys SyncFileRange(fd int, off int64, n int64, flags int) (err error) = SYS_SYNC_FILE_RANGE
|
||
|
//sys Truncate(path string, length int64) (err error)
|
||
|
//sysnb getgroups(n int, list *_Gid_t) (nn int, err error)
|
||
|
//sysnb setgroups(n int, list *_Gid_t) (err error)
|
||
|
|
||
|
func Getpagesize() int { return 4096 }
|
||
|
|
||
|
//sysnb Gettimeofday(tv *Timeval) (err error)
|
||
|
|
||
|
func Time(t *Time_t) (tt Time_t, err error) {
|
||
|
var tv Timeval
|
||
|
err = Gettimeofday(&tv)
|
||
|
if err != nil {
|
||
|
return 0, err
|
||
|
}
|
||
|
if t != nil {
|
||
|
*t = Time_t(tv.Sec)
|
||
|
}
|
||
|
return Time_t(tv.Sec), nil
|
||
|
}
|
||
|
|
||
|
func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) }
|
||
|
|
||
|
func NsecToTimespec(nsec int64) (ts Timespec) {
|
||
|
ts.Sec = nsec / 1e9
|
||
|
ts.Nsec = nsec % 1e9
|
||
|
return
|
||
|
}
|
||
|
|
||
|
func TimevalToNsec(tv Timeval) int64 { return int64(tv.Sec)*1e9 + int64(tv.Usec)*1e3 }
|
||
|
|
||
|
func NsecToTimeval(nsec int64) (tv Timeval) {
|
||
|
nsec += 999 // round up to microsecond
|
||
|
tv.Sec = nsec / 1e9
|
||
|
tv.Usec = nsec % 1e9 / 1e3
|
||
|
return
|
||
|
}
|
||
|
|
||
|
func Pipe(p []int) (err error) {
|
||
|
if len(p) != 2 {
|
||
|
return EINVAL
|
||
|
}
|
||
|
var pp [2]_C_int
|
||
|
err = pipe2(&pp, 0)
|
||
|
p[0] = int(pp[0])
|
||
|
p[1] = int(pp[1])
|
||
|
return
|
||
|
}
|
||
|
|
||
|
//sysnb pipe2(p *[2]_C_int, flags int) (err error)
|
||
|
|
||
|
func Pipe2(p []int, flags int) (err error) {
|
||
|
if len(p) != 2 {
|
||
|
return EINVAL
|
||
|
}
|
||
|
var pp [2]_C_int
|
||
|
err = pipe2(&pp, flags)
|
||
|
p[0] = int(pp[0])
|
||
|
p[1] = int(pp[1])
|
||
|
return
|
||
|
}
|
||
|
|
||
|
// Linux on s390x uses the old mmap interface, which requires arguments to be passed in a struct.
|
||
|
// mmap2 also requires arguments to be passed in a struct; it is currently not exposed in <asm/unistd.h>.
|
||
|
func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
|
||
|
mmap_args := [6]uintptr{addr, length, uintptr(prot), uintptr(flags), uintptr(fd), uintptr(offset)}
|
||
|
r0, _, e1 := Syscall(SYS_MMAP, uintptr(unsafe.Pointer(&mmap_args[0])), 0, 0)
|
||
|
use(unsafe.Pointer(&mmap_args[0]))
|
||
|
xaddr = uintptr(r0)
|
||
|
if e1 != 0 {
|
||
|
err = errnoErr(e1)
|
||
|
}
|
||
|
return
|
||
|
}
|
||
|
|
||
|
// On s390x Linux, all the socket calls go through an extra indirection.
|
||
|
// The arguments to the underlying system call are the number below
|
||
|
// and a pointer to an array of uintptr. We hide the pointer in the
|
||
|
// socketcall assembly to avoid allocation on every system call.
|
||
|
|
||
|
const (
|
||
|
// see linux/net.h
|
||
|
_SOCKET = 1
|
||
|
_BIND = 2
|
||
|
_CONNECT = 3
|
||
|
_LISTEN = 4
|
||
|
_ACCEPT = 5
|
||
|
_GETSOCKNAME = 6
|
||
|
_GETPEERNAME = 7
|
||
|
_SOCKETPAIR = 8
|
||
|
_SEND = 9
|
||
|
_RECV = 10
|
||
|
_SENDTO = 11
|
||
|
_RECVFROM = 12
|
||
|
_SHUTDOWN = 13
|
||
|
_SETSOCKOPT = 14
|
||
|
_GETSOCKOPT = 15
|
||
|
_SENDMSG = 16
|
||
|
_RECVMSG = 17
|
||
|
_ACCEPT4 = 18
|
||
|
_RECVMMSG = 19
|
||
|
_SENDMMSG = 20
|
||
|
)
|
||
|
|
||
|
func socketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (n int, err Errno)
|
||
|
func rawsocketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (n int, err Errno)
|
||
|
|
||
|
func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) {
|
||
|
fd, e := socketcall(_ACCEPT, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0)
|
||
|
if e != 0 {
|
||
|
err = e
|
||
|
}
|
||
|
return
|
||
|
}
|
||
|
|
||
|
func accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error) {
|
||
|
fd, e := socketcall(_ACCEPT4, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags), 0, 0)
|
||
|
if e != 0 {
|
||
|
err = e
|
||
|
}
|
||
|
return
|
||
|
}
|
||
|
|
||
|
func getsockname(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
|
||
|
_, e := rawsocketcall(_GETSOCKNAME, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0)
|
||
|
if e != 0 {
|
||
|
err = e
|
||
|
}
|
||
|
return
|
||
|
}
|
||
|
|
||
|
func getpeername(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
|
||
|
_, e := rawsocketcall(_GETPEERNAME, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0)
|
||
|
if e != 0 {
|
||
|
err = e
|
||
|
}
|
||
|
return
|
||
|
}
|
||
|
|
||
|
func socketpair(domain int, typ int, flags int, fd *[2]int32) (err error) {
|
||
|
_, e := rawsocketcall(_SOCKETPAIR, uintptr(domain), uintptr(typ), uintptr(flags), uintptr(unsafe.Pointer(fd)), 0, 0)
|
||
|
if e != 0 {
|
||
|
err = e
|
||
|
}
|
||
|
return
|
||
|
}
|
||
|
|
||
|
func bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
|
||
|
_, e := socketcall(_BIND, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0)
|
||
|
if e != 0 {
|
||
|
err = e
|
||
|
}
|
||
|
return
|
||
|
}
|
||
|
|
||
|
func connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
|
||
|
_, e := socketcall(_CONNECT, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0)
|
||
|
if e != 0 {
|
||
|
err = e
|
||
|
}
|
||
|
return
|
||
|
}
|
||
|
|
||
|
func socket(domain int, typ int, proto int) (fd int, err error) {
|
||
|
fd, e := rawsocketcall(_SOCKET, uintptr(domain), uintptr(typ), uintptr(proto), 0, 0, 0)
|
||
|
if e != 0 {
|
||
|
err = e
|
||
|
}
|
||
|
return
|
||
|
}
|
||
|
|
||
|
func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
|
||
|
_, e := socketcall(_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
|
||
|
if e != 0 {
|
||
|
err = e
|
||
|
}
|
||
|
return
|
||
|
}
|
||
|
|
||
|
func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) {
|
||
|
_, e := socketcall(_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), vallen, 0)
|
||
|
if e != 0 {
|
||
|
err = e
|
||
|
}
|
||
|
return
|
||
|
}
|
||
|
|
||
|
func recvfrom(s int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) {
|
||
|
var base uintptr
|
||
|
if len(p) > 0 {
|
||
|
base = uintptr(unsafe.Pointer(&p[0]))
|
||
|
}
|
||
|
n, e := socketcall(_RECVFROM, uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen)))
|
||
|
if e != 0 {
|
||
|
err = e
|
||
|
}
|
||
|
return
|
||
|
}
|
||
|
|
||
|
func sendto(s int, p []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) {
|
||
|
var base uintptr
|
||
|
if len(p) > 0 {
|
||
|
base = uintptr(unsafe.Pointer(&p[0]))
|
||
|
}
|
||
|
_, e := socketcall(_SENDTO, uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(to), uintptr(addrlen))
|
||
|
if e != 0 {
|
||
|
err = e
|
||
|
}
|
||
|
return
|
||
|
}
|
||
|
|
||
|
func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) {
|
||
|
n, e := socketcall(_RECVMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0)
|
||
|
if e != 0 {
|
||
|
err = e
|
||
|
}
|
||
|
return
|
||
|
}
|
||
|
|
||
|
func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) {
|
||
|
n, e := socketcall(_SENDMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0)
|
||
|
if e != 0 {
|
||
|
err = e
|
||
|
}
|
||
|
return
|
||
|
}
|
||
|
|
||
|
func Listen(s int, n int) (err error) {
|
||
|
_, e := socketcall(_LISTEN, uintptr(s), uintptr(n), 0, 0, 0, 0)
|
||
|
if e != 0 {
|
||
|
err = e
|
||
|
}
|
||
|
return
|
||
|
}
|
||
|
|
||
|
func Shutdown(s, how int) (err error) {
|
||
|
_, e := socketcall(_SHUTDOWN, uintptr(s), uintptr(how), 0, 0, 0, 0)
|
||
|
if e != 0 {
|
||
|
err = e
|
||
|
}
|
||
|
return
|
||
|
}
|
||
|
|
||
|
func (r *PtraceRegs) PC() uint64 { return r.Psw.Addr }
|
||
|
|
||
|
func (r *PtraceRegs) SetPC(pc uint64) { r.Psw.Addr = pc }
|
||
|
|
||
|
func (iov *Iovec) SetLen(length int) {
|
||
|
iov.Len = uint64(length)
|
||
|
}
|
||
|
|
||
|
func (msghdr *Msghdr) SetControllen(length int) {
|
||
|
msghdr.Controllen = uint64(length)
|
||
|
}
|
||
|
|
||
|
func (cmsg *Cmsghdr) SetLen(length int) {
|
||
|
cmsg.Len = uint64(length)
|
||
|
}
|