| // 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 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) |
| } |