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Source file src/syscall/syscall_linux_riscv64.go

Documentation: syscall

     1  // Copyright 2019 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  package syscall
     6  
     7  import "unsafe"
     8  
     9  // archHonorsR2 captures the fact that r2 is honored by the
    10  // runtime.GOARCH.  Syscall conventions are generally r1, r2, err :=
    11  // syscall(trap, ...).  Not all architectures define r2 in their
    12  // ABI. See "man syscall".
    13  const archHonorsR2 = true
    14  
    15  const _SYS_setgroups = SYS_SETGROUPS
    16  
    17  func EpollCreate(size int) (fd int, err error) {
    18  	if size <= 0 {
    19  		return -1, EINVAL
    20  	}
    21  	return EpollCreate1(0)
    22  }
    23  
    24  //sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) = SYS_EPOLL_PWAIT
    25  //sys	Fchown(fd int, uid int, gid int) (err error)
    26  //sys	Fstat(fd int, stat *Stat_t) (err error)
    27  //sys	Fstatat(fd int, path string, stat *Stat_t, flags int) (err error)
    28  //sys	fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error)
    29  //sys	Fstatfs(fd int, buf *Statfs_t) (err error)
    30  //sys	Ftruncate(fd int, length int64) (err error)
    31  //sysnb	Getegid() (egid int)
    32  //sysnb	Geteuid() (euid int)
    33  //sysnb	Getgid() (gid int)
    34  //sysnb	Getrlimit(resource int, rlim *Rlimit) (err error)
    35  //sysnb	Getuid() (uid int)
    36  //sys	Listen(s int, n int) (err error)
    37  //sys	Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
    38  //sys	Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
    39  //sys	renameat2(olddirfd int, oldpath string, newdirfd int, newpath string, flags uint) (err error)
    40  //sys	Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
    41  //sys	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
    42  //sys	Setfsgid(gid int) (err error)
    43  //sys	Setfsuid(uid int) (err error)
    44  //sysnb	Setrlimit(resource int, rlim *Rlimit) (err error)
    45  //sys	Shutdown(fd int, how int) (err error)
    46  //sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
    47  
    48  func Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) {
    49  	return renameat2(olddirfd, oldpath, newdirfd, newpath, 0)
    50  }
    51  
    52  func Stat(path string, stat *Stat_t) (err error) {
    53  	return Fstatat(_AT_FDCWD, path, stat, 0)
    54  }
    55  
    56  func Lchown(path string, uid int, gid int) (err error) {
    57  	return Fchownat(_AT_FDCWD, path, uid, gid, _AT_SYMLINK_NOFOLLOW)
    58  }
    59  
    60  func Lstat(path string, stat *Stat_t) (err error) {
    61  	return Fstatat(_AT_FDCWD, path, stat, _AT_SYMLINK_NOFOLLOW)
    62  }
    63  
    64  //sys	Statfs(path string, buf *Statfs_t) (err error)
    65  //sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)
    66  //sys	Truncate(path string, length int64) (err error)
    67  //sys	accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error)
    68  //sys	accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
    69  //sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
    70  //sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
    71  //sysnb	getgroups(n int, list *_Gid_t) (nn int, err error)
    72  //sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
    73  //sys	setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
    74  //sysnb	socket(domain int, typ int, proto int) (fd int, err error)
    75  //sysnb	socketpair(domain int, typ int, proto int, fd *[2]int32) (err error)
    76  //sysnb	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
    77  //sysnb	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
    78  //sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
    79  //sys	sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
    80  //sys	recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
    81  //sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
    82  //sys	mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error)
    83  
    84  type sigset_t struct {
    85  	X__val [16]uint64
    86  }
    87  
    88  //sys	pselect(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timespec, sigmask *sigset_t) (n int, err error) = SYS_PSELECT6
    89  
    90  func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) {
    91  	var ts *Timespec
    92  	if timeout != nil {
    93  		ts = &Timespec{Sec: timeout.Sec, Nsec: timeout.Usec * 1000}
    94  	}
    95  	return pselect(nfd, r, w, e, ts, nil)
    96  }
    97  
    98  //sysnb	Gettimeofday(tv *Timeval) (err error)
    99  
   100  func setTimespec(sec, nsec int64) Timespec {
   101  	return Timespec{Sec: sec, Nsec: nsec}
   102  }
   103  
   104  func setTimeval(sec, usec int64) Timeval {
   105  	return Timeval{Sec: sec, Usec: usec}
   106  }
   107  
   108  func futimesat(dirfd int, path string, tv *[2]Timeval) (err error) {
   109  	if tv == nil {
   110  		return utimensat(dirfd, path, nil, 0)
   111  	}
   112  
   113  	ts := []Timespec{
   114  		NsecToTimespec(TimevalToNsec(tv[0])),
   115  		NsecToTimespec(TimevalToNsec(tv[1])),
   116  	}
   117  	return utimensat(dirfd, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
   118  }
   119  
   120  func Time(t *Time_t) (Time_t, error) {
   121  	var tv Timeval
   122  	err := Gettimeofday(&tv)
   123  	if err != nil {
   124  		return 0, err
   125  	}
   126  	if t != nil {
   127  		*t = Time_t(tv.Sec)
   128  	}
   129  	return Time_t(tv.Sec), nil
   130  }
   131  
   132  func Utime(path string, buf *Utimbuf) error {
   133  	tv := []Timeval{
   134  		{Sec: buf.Actime},
   135  		{Sec: buf.Modtime},
   136  	}
   137  	return Utimes(path, tv)
   138  }
   139  
   140  func utimes(path string, tv *[2]Timeval) (err error) {
   141  	if tv == nil {
   142  		return utimensat(_AT_FDCWD, path, nil, 0)
   143  	}
   144  
   145  	ts := []Timespec{
   146  		NsecToTimespec(TimevalToNsec(tv[0])),
   147  		NsecToTimespec(TimevalToNsec(tv[1])),
   148  	}
   149  	return utimensat(_AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
   150  }
   151  
   152  func Pipe(p []int) (err error) {
   153  	if len(p) != 2 {
   154  		return EINVAL
   155  	}
   156  	var pp [2]_C_int
   157  	err = pipe2(&pp, 0)
   158  	p[0] = int(pp[0])
   159  	p[1] = int(pp[1])
   160  	return
   161  }
   162  
   163  //sysnb pipe2(p *[2]_C_int, flags int) (err error)
   164  
   165  func Pipe2(p []int, flags int) (err error) {
   166  	if len(p) != 2 {
   167  		return EINVAL
   168  	}
   169  	var pp [2]_C_int
   170  	err = pipe2(&pp, flags)
   171  	p[0] = int(pp[0])
   172  	p[1] = int(pp[1])
   173  	return
   174  }
   175  
   176  func (r *PtraceRegs) PC() uint64 { return r.Pc }
   177  
   178  func (r *PtraceRegs) SetPC(pc uint64) { r.Pc = pc }
   179  
   180  func (iov *Iovec) SetLen(length int) {
   181  	iov.Len = uint64(length)
   182  }
   183  
   184  func (msghdr *Msghdr) SetControllen(length int) {
   185  	msghdr.Controllen = uint64(length)
   186  }
   187  
   188  func (cmsg *Cmsghdr) SetLen(length int) {
   189  	cmsg.Len = uint64(length)
   190  }
   191  
   192  func InotifyInit() (fd int, err error) {
   193  	return InotifyInit1(0)
   194  }
   195  
   196  //sys	ppoll(fds *pollFd, nfds int, timeout *Timespec, sigmask *sigset_t) (n int, err error)
   197  
   198  func Pause() error {
   199  	_, err := ppoll(nil, 0, nil, nil)
   200  	return err
   201  }
   202  
   203  func rawVforkSyscall(trap, a1 uintptr) (r1 uintptr, err Errno)
   204  

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