1 files changed, 226 insertions, 0 deletions
diff --git a/src/syscall/syscall_linux_loong64.go b/src/syscall/syscall_linux_loong64.go
new file mode 100644
index 0000000..f8f01c2
--- /dev/null
+++ b/src/syscall/syscall_linux_loong64.go
@@ -0,0 +1,226 @@
+// Copyright 2022 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	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) = SYS_EPOLL_PWAIT
+//sys	Fchown(fd int, uid int, gid int) (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	Getuid() (uid int)
+//sys	Listen(s int, n int) (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_RENAMEAT2
+//sys	Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
+//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)
+//sys	Shutdown(fd int, how int) (err error)
+//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
+//sys	statx(dirfd int, path string, flags int, mask int, stat *statx_t) (err error)
+
+// makedev makes C dev_t from major and minor numbers the glibc way:
+// 0xMMMM_MMMM 0xmmmm_mmmm -> 0xMMMM_Mmmm_mmmM_MMmm
+func makedev(major uint32, minor uint32) uint64 {
+	majorH := uint64(major >> 12)
+	majorL := uint64(major & 0xfff)
+	minorH := uint64(minor >> 8)
+	minorL := uint64(minor & 0xff)
+	return (majorH << 44) | (minorH << 20) | (majorL << 8) | minorL
+}
+
+func timespecFromStatxTimestamp(x statxTimestamp) Timespec {
+	return Timespec{
+		Sec:  x.Sec,
+		Nsec: int64(x.Nsec),
+	}
+}
+
+func fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) {
+	var r statx_t
+	// Do it the glibc way, add AT_NO_AUTOMOUNT.
+	if err = statx(dirfd, path, _AT_NO_AUTOMOUNT|flags, _STATX_BASIC_STATS, &r); err != nil {
+		return err
+	}
+
+	stat.Dev = makedev(r.Dev_major, r.Dev_minor)
+	stat.Ino = r.Ino
+	stat.Mode = uint32(r.Mode)
+	stat.Nlink = r.Nlink
+	stat.Uid = r.Uid
+	stat.Gid = r.Gid
+	stat.Rdev = makedev(r.Rdev_major, r.Rdev_minor)
+	// hope we don't get to process files so large to overflow these size
+	// fields...
+	stat.Size = int64(r.Size)
+	stat.Blksize = int32(r.Blksize)
+	stat.Blocks = int64(r.Blocks)
+	stat.Atim = timespecFromStatxTimestamp(r.Atime)
+	stat.Mtim = timespecFromStatxTimestamp(r.Mtime)
+	stat.Ctim = timespecFromStatxTimestamp(r.Ctime)
+
+	return nil
+}
+
+func Fstatat(fd int, path string, stat *Stat_t, flags int) (err error) {
+	return fstatat(fd, path, stat, flags)
+}
+
+func Fstat(fd int, stat *Stat_t) (err error) {
+	return fstatat(fd, "", stat, _AT_EMPTY_PATH)
+}
+
+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)
+}
+
+//sys	Statfs(path string, buf *Statfs_t) (err error)
+//sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)
+//sys	Truncate(path string, length int64) (err error)
+//sys	accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
+//sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
+//sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
+//sysnb	getgroups(n int, list *_Gid_t) (nn int, err error)
+//sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
+//sys	setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
+//sysnb	socket(domain int, typ int, proto int) (fd int, err error)
+//sysnb	socketpair(domain int, typ int, proto int, fd *[2]int32) (err error)
+//sysnb	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
+//sysnb	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
+//sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
+//sys	sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
+//sys	recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
+//sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
+//sys	mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error)
+
+type sigset_t struct {
+	X__val [16]uint64
+}
+
+//sys	pselect(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timespec, sigmask *sigset_t) (n int, err error) = SYS_PSELECT6
+
+func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) {
+	var ts *Timespec
+	if timeout != nil {
+		ts = &Timespec{Sec: timeout.Sec, Nsec: timeout.Usec * 1000}
+	}
+	return pselect(nfd, r, w, e, ts, nil)
+}
+
+//sysnb	Gettimeofday(tv *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}
+}
+
+func futimesat(dirfd int, path string, tv *[2]Timeval) (err error) {
+	if tv == nil {
+		return utimensat(dirfd, path, nil, 0)
+	}
+
+	ts := []Timespec{
+		NsecToTimespec(TimevalToNsec(tv[0])),
+		NsecToTimespec(TimevalToNsec(tv[1])),
+	}
+	return utimensat(dirfd, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
+}
+
+func Time(t *Time_t) (Time_t, 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 Utime(path string, buf *Utimbuf) error {
+	tv := []Timeval{
+		{Sec: buf.Actime},
+		{Sec: buf.Modtime},
+	}
+	return Utimes(path, tv)
+}
+
+func utimes(path string, tv *[2]Timeval) (err error) {
+	if tv == nil {
+		return utimensat(_AT_FDCWD, path, nil, 0)
+	}
+
+	ts := []Timespec{
+		NsecToTimespec(TimevalToNsec(tv[0])),
+		NsecToTimespec(TimevalToNsec(tv[1])),
+	}
+	return utimensat(_AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
+}
+
+// Getrlimit prefers the prlimit64 system call.
+func Getrlimit(resource int, rlim *Rlimit) error {
+	return prlimit(0, resource, nil, rlim)
+}
+
+// setrlimit prefers the prlimit64 system call.
+func setrlimit(resource int, rlim *Rlimit) error {
+	return prlimit(0, resource, rlim, nil)
+}
+
+//go:nosplit
+func rawSetrlimit(resource int, rlim *Rlimit) Errno {
+	_, _, errno := RawSyscall6(SYS_PRLIMIT64, 0, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0, 0, 0)
+	return errno
+}
+
+func (r *PtraceRegs) GetEra() uint64 { return r.Era }
+
+func (r *PtraceRegs) SetEra(era uint64) { r.Era = era }
+
+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)
+}
+
+func InotifyInit() (fd int, err error) {
+	return InotifyInit1(0)
+}
+
+//sys	ppoll(fds *pollFd, nfds int, timeout *Timespec, sigmask *sigset_t) (n int, err error)
+
+func Pause() error {
+	_, err := ppoll(nil, 0, nil, nil)
+	return err
+}