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// Copyright 2009 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"
// archHonorsR2 captures the fact that r2 is honored by the
// runtime.GOARCH. Syscall conventions are generally r1, r2, err :=
// syscall(trap, ...). Not all architectures define r2 in their
// ABI. See "man syscall".
const archHonorsR2 = true
const _SYS_setgroups = SYS_SETGROUPS32
func setTimespec(sec, nsec int64) Timespec {
return Timespec{Sec: int32(sec), Nsec: int32(nsec)}
}
func setTimeval(sec, usec int64) Timeval {
return Timeval{Sec: int32(sec), Usec: int32(usec)}
}
//sysnb pipe(p *[2]_C_int) (err error)
func Pipe(p []int) (err error) {
if len(p) != 2 {
return EINVAL
}
var pp [2]_C_int
err = pipe(&pp)
if err == nil {
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)
if err == nil {
p[0] = int(pp[0])
p[1] = int(pp[1])
}
return
}
// 64-bit file system and 32-bit uid calls
// (386 default is 32-bit file system and 16-bit uid).
//sys Dup2(oldfd int, newfd int) (err error)
//sysnb EpollCreate(size int) (fd int, err error)
//sys Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32
//sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
//sys fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64
//sys Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64
//sysnb Getegid() (egid int) = SYS_GETEGID32
//sysnb Geteuid() (euid int) = SYS_GETEUID32
//sysnb Getgid() (gid int) = SYS_GETGID32
//sysnb Getuid() (uid int) = SYS_GETUID32
//sysnb InotifyInit() (fd int, err error)
//sys Ioperm(from int, num int, on int) (err error)
//sys Iopl(level int) (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 sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64
//sys Setfsgid(gid int) (err error) = SYS_SETFSGID32
//sys Setfsuid(uid int) (err error) = SYS_SETFSUID32
//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
//sys SyncFileRange(fd int, off int64, n int64, flags int) (err error)
//sys Truncate(path string, length int64) (err error) = SYS_TRUNCATE64
//sys Ustat(dev int, ubuf *Ustat_t) (err error)
//sysnb getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32
//sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT
//sys mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error)
//sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
func Stat(path string, stat *Stat_t) (err error) {
return fstatat(_AT_FDCWD, path, stat, 0)
}
func Lchown(path string, uid int, gid int) (err error) {
return Fchownat(_AT_FDCWD, path, uid, gid, _AT_SYMLINK_NOFOLLOW)
}
func Lstat(path string, stat *Stat_t) (err error) {
return fstatat(_AT_FDCWD, path, stat, _AT_SYMLINK_NOFOLLOW)
}
func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
page := uintptr(offset / 4096)
if offset != int64(page)*4096 {
return 0, EINVAL
}
return mmap2(addr, length, prot, flags, fd, page)
}
type rlimit32 struct {
Cur uint32
Max uint32
}
//sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_GETRLIMIT
const rlimInf32 = ^uint32(0)
const rlimInf64 = ^uint64(0)
func Getrlimit(resource int, rlim *Rlimit) (err error) {
err = prlimit(0, resource, nil, rlim)
if err != ENOSYS {
return err
}
rl := rlimit32{}
err = getrlimit(resource, &rl)
if err != nil {
return
}
if rl.Cur == rlimInf32 {
rlim.Cur = rlimInf64
} else {
rlim.Cur = uint64(rl.Cur)
}
if rl.Max == rlimInf32 {
rlim.Max = rlimInf64
} else {
rlim.Max = uint64(rl.Max)
}
return
}
//sysnb setrlimit(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT
func Setrlimit(resource int, rlim *Rlimit) (err error) {
err = prlimit(0, resource, rlim, nil)
if err != ENOSYS {
return err
}
rl := rlimit32{}
if rlim.Cur == rlimInf64 {
rl.Cur = rlimInf32
} else if rlim.Cur < uint64(rlimInf32) {
rl.Cur = uint32(rlim.Cur)
} else {
return EINVAL
}
if rlim.Max == rlimInf64 {
rl.Max = rlimInf32
} else if rlim.Max < uint64(rlimInf32) {
rl.Max = uint32(rlim.Max)
} else {
return EINVAL
}
return setrlimit(resource, &rl)
}
// Underlying system call writes to newoffset via pointer.
// Implemented in assembly to avoid allocation.
func seek(fd int, offset int64, whence int) (newoffset int64, err Errno)
func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
newoffset, errno := seek(fd, offset, whence)
if errno != 0 {
return 0, errno
}
return newoffset, nil
}
//sys futimesat(dirfd int, path string, times *[2]Timeval) (err error)
//sysnb Gettimeofday(tv *Timeval) (err error)
//sysnb Time(t *Time_t) (tt Time_t, err error)
//sys Utime(path string, buf *Utimbuf) (err error)
//sys utimes(path string, times *[2]Timeval) (err error)
// On x86 Linux, all the socket calls go through an extra indirection,
// I think because the 5-register system call interface can't handle
// the 6-argument calls like sendto and recvfrom. Instead 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 Fstatfs(fd int, buf *Statfs_t) (err error) {
_, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
if e != 0 {
err = e
}
return
}
func Statfs(path string, buf *Statfs_t) (err error) {
pathp, err := BytePtrFromString(path)
if err != nil {
return err
}
_, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
if e != 0 {
err = e
}
return
}
func (r *PtraceRegs) PC() uint64 { return uint64(uint32(r.Eip)) }
func (r *PtraceRegs) SetPC(pc uint64) { r.Eip = int32(pc) }
func (iov *Iovec) SetLen(length int) {
iov.Len = uint32(length)
}
func (msghdr *Msghdr) SetControllen(length int) {
msghdr.Controllen = uint32(length)
}
func (cmsg *Cmsghdr) SetLen(length int) {
cmsg.Len = uint32(length)
}
func rawVforkSyscall(trap, a1 uintptr) (r1 uintptr, err Errno)
|
