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// 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_setgroups = SYS_SETGROUPS
_SYS_clone3 = 435
_SYS_faccessat2 = 439
_SYS_fchmodat2 = 452
)
//sys Dup2(oldfd int, newfd int) (err error)
//sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
//sys Fchown(fd int, uid int, gid int) (err error)
//sys Fstat(fd int, stat *Stat_t) (err error)
//sys fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_NEWFSTATAT
//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 Pause() (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 Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
//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 setrlimit(resource int, rlim *Rlimit) (err error) = SYS_SETRLIMIT
//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)
//sys Ustat(dev int, ubuf *Ustat_t) (err error)
//sysnb getgroups(n int, list *_Gid_t) (nn int, err error)
//sys futimesat(dirfd int, path string, times *[2]Timeval) (err error)
//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
}
//sys Utime(path string, buf *Utimbuf) (err error)
//sys utimes(path string, times *[2]Timeval) (err error)
func setTimespec(sec, nsec int64) Timespec {
return Timespec{Sec: sec, Nsec: nsec}
}
func setTimeval(sec, usec int64) Timeval {
return Timeval{Sec: sec, Usec: usec}
}
// 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)
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 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
}
//go:nosplit
func rawSetrlimit(resource int, rlim *Rlimit) Errno {
_, _, errno := RawSyscall(SYS_SETRLIMIT, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0)
return errno
}
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)
}
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