1 // Copyright 2009 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
10 _SYS_setgroups = SYS_SETGROUPS32
13 _SYS_pidfd_send_signal = 424
17 func setTimespec(sec, nsec int64) Timespec {
18 return Timespec{Sec: int32(sec), Nsec: int32(nsec)}
21 func setTimeval(sec, usec int64) Timeval {
22 return Timeval{Sec: int32(sec), Usec: int32(usec)}
25 // Underlying system call writes to newoffset via pointer.
26 // Implemented in assembly to avoid allocation.
27 func seek(fd int, offset int64, whence int) (newoffset int64, err Errno)
29 func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
30 newoffset, errno := seek(fd, offset, whence)
37 //sys accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
38 //sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
39 //sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
40 //sysnb getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32
41 //sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
42 //sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
43 //sysnb socket(domain int, typ int, proto int) (fd int, err error)
44 //sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
45 //sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
46 //sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
47 //sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
48 //sysnb socketpair(domain int, typ int, flags int, fd *[2]int32) (err error)
49 //sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
50 //sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
52 // 64-bit file system and 32-bit uid calls
53 // (16-bit uid calls are not always supported in newer kernels)
54 //sys Dup2(oldfd int, newfd int) (err error)
55 //sys Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32
56 //sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
57 //sys fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64
58 //sysnb Getegid() (egid int) = SYS_GETEGID32
59 //sysnb Geteuid() (euid int) = SYS_GETEUID32
60 //sysnb Getgid() (gid int) = SYS_GETGID32
61 //sysnb Getuid() (uid int) = SYS_GETUID32
62 //sysnb InotifyInit() (fd int, err error)
63 //sys Listen(s int, n int) (err error)
64 //sys Pause() (err error)
65 //sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
66 //sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64
67 //sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT
68 //sys Setfsgid(gid int) (err error) = SYS_SETFSGID32
69 //sys Setfsuid(uid int) (err error) = SYS_SETFSUID32
70 //sys Shutdown(fd int, how int) (err error)
71 //sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
72 //sys Ustat(dev int, ubuf *Ustat_t) (err error)
74 //sys futimesat(dirfd int, path string, times *[2]Timeval) (err error)
75 //sysnb Gettimeofday(tv *Timeval) (err error)
76 //sysnb Time(t *Time_t) (tt Time_t, err error)
77 //sys Utime(path string, buf *Utimbuf) (err error)
78 //sys utimes(path string, times *[2]Timeval) (err error)
80 //sys pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
81 //sys pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
82 //sys Truncate(path string, length int64) (err error) = SYS_TRUNCATE64
83 //sys Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64
85 //sys mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error)
86 //sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
88 func Stat(path string, stat *Stat_t) (err error) {
89 return fstatat(_AT_FDCWD, path, stat, 0)
92 func Lchown(path string, uid int, gid int) (err error) {
93 return Fchownat(_AT_FDCWD, path, uid, gid, _AT_SYMLINK_NOFOLLOW)
96 func Lstat(path string, stat *Stat_t) (err error) {
97 return fstatat(_AT_FDCWD, path, stat, _AT_SYMLINK_NOFOLLOW)
100 func Fstatfs(fd int, buf *Statfs_t) (err error) {
101 _, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
108 func Statfs(path string, buf *Statfs_t) (err error) {
109 pathp, err := BytePtrFromString(path)
113 _, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
120 func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
121 page := uintptr(offset / 4096)
122 if offset != int64(page)*4096 {
125 return mmap2(addr, length, prot, flags, fd, page)
128 type rlimit32 struct {
133 //sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_GETRLIMIT
135 const rlimInf32 = ^uint32(0)
136 const rlimInf64 = ^uint64(0)
138 func Getrlimit(resource int, rlim *Rlimit) (err error) {
139 err = prlimit(0, resource, nil, rlim)
145 err = getrlimit(resource, &rl)
150 if rl.Cur == rlimInf32 {
153 rlim.Cur = uint64(rl.Cur)
156 if rl.Max == rlimInf32 {
159 rlim.Max = uint64(rl.Max)
164 //sysnb setrlimit1(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT
166 func setrlimit(resource int, rlim *Rlimit) (err error) {
167 err = prlimit(0, resource, rlim, nil)
173 if rlim.Cur == rlimInf64 {
175 } else if rlim.Cur < uint64(rlimInf32) {
176 rl.Cur = uint32(rlim.Cur)
180 if rlim.Max == rlimInf64 {
182 } else if rlim.Max < uint64(rlimInf32) {
183 rl.Max = uint32(rlim.Max)
188 return setrlimit1(resource, &rl)
192 func rawSetrlimit(resource int, rlim *Rlimit) Errno {
193 _, _, errno := RawSyscall6(SYS_PRLIMIT64, 0, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0, 0, 0)
199 if rlim.Cur == rlimInf64 {
201 } else if rlim.Cur < uint64(rlimInf32) {
202 rl.Cur = uint32(rlim.Cur)
206 if rlim.Max == rlimInf64 {
208 } else if rlim.Max < uint64(rlimInf32) {
209 rl.Max = uint32(rlim.Max)
214 _, _, errno = RawSyscall(SYS_SETRLIMIT, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0)
218 func (r *PtraceRegs) PC() uint64 { return uint64(r.Uregs[15]) }
220 func (r *PtraceRegs) SetPC(pc uint64) { r.Uregs[15] = uint32(pc) }
222 func (iov *Iovec) SetLen(length int) {
223 iov.Len = uint32(length)
226 func (msghdr *Msghdr) SetControllen(length int) {
227 msghdr.Controllen = uint32(length)
230 func (cmsg *Cmsghdr) SetLen(length int) {
231 cmsg.Len = uint32(length)