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syscall_linux_loong64.go (6810B)

      1 // Copyright 2022 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.
      4 
      5 //go:build loong64 && linux
      6 
      7 package unix
      8 
      9 import "unsafe"
     10 
     11 //sys	Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64
     12 //sys	Fchown(fd int, uid int, gid int) (err error)
     13 //sys	Fstatfs(fd int, buf *Statfs_t) (err error)
     14 //sys	Ftruncate(fd int, length int64) (err error)
     15 //sysnb	Getegid() (egid int)
     16 //sysnb	Geteuid() (euid int)
     17 //sysnb	Getgid() (gid int)
     18 //sysnb	Getuid() (uid int)
     19 //sys	Listen(s int, n int) (err error)
     20 //sys	pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
     21 //sys	pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
     22 //sys	Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
     23 
     24 func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) {
     25 	var ts *Timespec
     26 	if timeout != nil {
     27 		ts = &Timespec{Sec: timeout.Sec, Nsec: timeout.Usec * 1000}
     28 	}
     29 	return pselect6(nfd, r, w, e, ts, nil)
     30 }
     31 
     32 //sys	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
     33 //sys	setfsgid(gid int) (prev int, err error)
     34 //sys	setfsuid(uid int) (prev int, err error)
     35 //sys	Shutdown(fd int, how int) (err error)
     36 //sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
     37 
     38 func timespecFromStatxTimestamp(x StatxTimestamp) Timespec {
     39 	return Timespec{
     40 		Sec:  x.Sec,
     41 		Nsec: int64(x.Nsec),
     42 	}
     43 }
     44 
     45 func Fstatat(fd int, path string, stat *Stat_t, flags int) error {
     46 	var r Statx_t
     47 	// Do it the glibc way, add AT_NO_AUTOMOUNT.
     48 	if err := Statx(fd, path, AT_NO_AUTOMOUNT|flags, STATX_BASIC_STATS, &r); err != nil {
     49 		return err
     50 	}
     51 
     52 	stat.Dev = Mkdev(r.Dev_major, r.Dev_minor)
     53 	stat.Ino = r.Ino
     54 	stat.Mode = uint32(r.Mode)
     55 	stat.Nlink = r.Nlink
     56 	stat.Uid = r.Uid
     57 	stat.Gid = r.Gid
     58 	stat.Rdev = Mkdev(r.Rdev_major, r.Rdev_minor)
     59 	// hope we don't get to process files so large to overflow these size
     60 	// fields...
     61 	stat.Size = int64(r.Size)
     62 	stat.Blksize = int32(r.Blksize)
     63 	stat.Blocks = int64(r.Blocks)
     64 	stat.Atim = timespecFromStatxTimestamp(r.Atime)
     65 	stat.Mtim = timespecFromStatxTimestamp(r.Mtime)
     66 	stat.Ctim = timespecFromStatxTimestamp(r.Ctime)
     67 
     68 	return nil
     69 }
     70 
     71 func Fstat(fd int, stat *Stat_t) (err error) {
     72 	return Fstatat(fd, "", stat, AT_EMPTY_PATH)
     73 }
     74 
     75 func Stat(path string, stat *Stat_t) (err error) {
     76 	return Fstatat(AT_FDCWD, path, stat, 0)
     77 }
     78 
     79 func Lchown(path string, uid int, gid int) (err error) {
     80 	return Fchownat(AT_FDCWD, path, uid, gid, AT_SYMLINK_NOFOLLOW)
     81 }
     82 
     83 func Lstat(path string, stat *Stat_t) (err error) {
     84 	return Fstatat(AT_FDCWD, path, stat, AT_SYMLINK_NOFOLLOW)
     85 }
     86 
     87 //sys	Statfs(path string, buf *Statfs_t) (err error)
     88 //sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)
     89 //sys	Truncate(path string, length int64) (err error)
     90 
     91 func Ustat(dev int, ubuf *Ustat_t) (err error) {
     92 	return ENOSYS
     93 }
     94 
     95 //sys	accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
     96 //sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
     97 //sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
     98 //sysnb	getgroups(n int, list *_Gid_t) (nn int, err error)
     99 //sysnb	setgroups(n int, list *_Gid_t) (err error)
    100 //sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
    101 //sys	setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
    102 //sysnb	socket(domain int, typ int, proto int) (fd int, err error)
    103 //sysnb	socketpair(domain int, typ int, proto int, fd *[2]int32) (err error)
    104 //sysnb	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
    105 //sysnb	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
    106 //sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
    107 //sys	sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
    108 //sys	recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
    109 //sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
    110 //sys	mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error)
    111 
    112 //sysnb	Gettimeofday(tv *Timeval) (err error)
    113 
    114 func setTimespec(sec, nsec int64) Timespec {
    115 	return Timespec{Sec: sec, Nsec: nsec}
    116 }
    117 
    118 func setTimeval(sec, usec int64) Timeval {
    119 	return Timeval{Sec: sec, Usec: usec}
    120 }
    121 
    122 func Getrlimit(resource int, rlim *Rlimit) (err error) {
    123 	err = Prlimit(0, resource, nil, rlim)
    124 	return
    125 }
    126 
    127 func futimesat(dirfd int, path string, tv *[2]Timeval) (err error) {
    128 	if tv == nil {
    129 		return utimensat(dirfd, path, nil, 0)
    130 	}
    131 
    132 	ts := []Timespec{
    133 		NsecToTimespec(TimevalToNsec(tv[0])),
    134 		NsecToTimespec(TimevalToNsec(tv[1])),
    135 	}
    136 	return utimensat(dirfd, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
    137 }
    138 
    139 func Time(t *Time_t) (Time_t, error) {
    140 	var tv Timeval
    141 	err := Gettimeofday(&tv)
    142 	if err != nil {
    143 		return 0, err
    144 	}
    145 	if t != nil {
    146 		*t = Time_t(tv.Sec)
    147 	}
    148 	return Time_t(tv.Sec), nil
    149 }
    150 
    151 func Utime(path string, buf *Utimbuf) error {
    152 	if buf == nil {
    153 		return Utimes(path, nil)
    154 	}
    155 	tv := []Timeval{
    156 		{Sec: buf.Actime},
    157 		{Sec: buf.Modtime},
    158 	}
    159 	return Utimes(path, tv)
    160 }
    161 
    162 func utimes(path string, tv *[2]Timeval) (err error) {
    163 	if tv == nil {
    164 		return utimensat(AT_FDCWD, path, nil, 0)
    165 	}
    166 
    167 	ts := []Timespec{
    168 		NsecToTimespec(TimevalToNsec(tv[0])),
    169 		NsecToTimespec(TimevalToNsec(tv[1])),
    170 	}
    171 	return utimensat(AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
    172 }
    173 
    174 func (r *PtraceRegs) PC() uint64 { return r.Era }
    175 
    176 func (r *PtraceRegs) SetPC(era uint64) { r.Era = era }
    177 
    178 func (iov *Iovec) SetLen(length int) {
    179 	iov.Len = uint64(length)
    180 }
    181 
    182 func (msghdr *Msghdr) SetControllen(length int) {
    183 	msghdr.Controllen = uint64(length)
    184 }
    185 
    186 func (msghdr *Msghdr) SetIovlen(length int) {
    187 	msghdr.Iovlen = uint64(length)
    188 }
    189 
    190 func (cmsg *Cmsghdr) SetLen(length int) {
    191 	cmsg.Len = uint64(length)
    192 }
    193 
    194 func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
    195 	rsa.Service_name_len = uint64(length)
    196 }
    197 
    198 func Pause() error {
    199 	_, err := ppoll(nil, 0, nil, nil)
    200 	return err
    201 }
    202 
    203 func Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) {
    204 	return Renameat2(olddirfd, oldpath, newdirfd, newpath, 0)
    205 }
    206 
    207 //sys	kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error)
    208 
    209 func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error {
    210 	cmdlineLen := len(cmdline)
    211 	if cmdlineLen > 0 {
    212 		// Account for the additional NULL byte added by
    213 		// BytePtrFromString in kexecFileLoad. The kexec_file_load
    214 		// syscall expects a NULL-terminated string.
    215 		cmdlineLen++
    216 	}
    217 	return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags)
    218 }
    219 
    220 const SYS_FSTATAT = SYS_NEWFSTATAT