mirror of
https://github.com/golang/go
synced 2024-10-04 20:21:22 -06:00
c017a8299f
- syscall (not os) now defines the Errno type. - the low-level assembly functions Syscall, Syscall6, and so on return Errno, not uintptr - syscall wrappers all return error, not uintptr. R=golang-dev, mikioh.mikioh, r, alex.brainman CC=golang-dev https://golang.org/cl/5372080
139 lines
5.1 KiB
Go
139 lines
5.1 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package syscall
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import "unsafe"
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func Getpagesize() int { return 4096 }
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func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) }
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func NsecToTimespec(nsec int64) (ts Timespec) {
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ts.Sec = int32(nsec / 1e9)
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ts.Nsec = int32(nsec % 1e9)
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return
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}
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func NsecToTimeval(nsec int64) (tv Timeval) {
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nsec += 999 // round up to microsecond
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tv.Sec = int32(nsec / 1e9)
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tv.Usec = int32(nsec % 1e9 / 1e3)
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return
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}
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// Pread and Pwrite are special: they insert padding before the int64.
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func Pread(fd int, p []byte, offset int64) (n int, err error) {
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var _p0 unsafe.Pointer
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if len(p) > 0 {
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_p0 = unsafe.Pointer(&p[0])
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}
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r0, _, e1 := Syscall6(SYS_PREAD64, uintptr(fd), uintptr(_p0), uintptr(len(p)), 0, uintptr(offset), uintptr(offset>>32))
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n = int(r0)
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errno = int(e1)
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return
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}
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func Pwrite(fd int, p []byte, offset int64) (n int, err error) {
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var _p0 unsafe.Pointer
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if len(p) > 0 {
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_p0 = unsafe.Pointer(&p[0])
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}
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r0, _, e1 := Syscall6(SYS_PWRITE64, uintptr(fd), uintptr(_p0), uintptr(len(p)), 0, uintptr(offset), uintptr(offset>>32))
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n = int(r0)
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errno = int(e1)
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return
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}
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func Ftruncate(fd int, length int64) (err error) {
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// ARM EABI requires 64-bit arguments should be put in a pair
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// of registers from an even register number.
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_, _, e1 := Syscall6(SYS_FTRUNCATE64, uintptr(fd), 0, uintptr(length), uintptr(length>>32), 0, 0)
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errno = int(e1)
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return
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}
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func Truncate(path string, length int64) (err error) {
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_, _, e1 := Syscall6(SYS_TRUNCATE64, uintptr(unsafe.Pointer(StringBytePtr(path))), 0, uintptr(length), uintptr(length>>32), 0, 0)
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errno = int(e1)
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return
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}
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// Seek is defined in assembly.
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func Seek(fd int, offset int64, whence int) (newoffset int64, err error)
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//sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error)
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//sys bind(s int, addr uintptr, addrlen _Socklen) (err error)
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//sys connect(s int, addr uintptr, addrlen _Socklen) (err error)
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//sysnb getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32
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//sysnb setgroups(n int, list *_Gid_t) (err error) = SYS_SETGROUPS32
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//sys getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (err error)
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//sys setsockopt(s int, level int, name int, val uintptr, vallen uintptr) (err error)
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//sysnb socket(domain int, typ int, proto int) (fd int, err error)
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//sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
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//sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
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//sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
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//sys sendto(s int, buf []byte, flags int, to uintptr, addrlen _Socklen) (err error)
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//sysnb socketpair(domain int, typ int, flags int, fd *[2]int) (err error)
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//sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
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//sys sendmsg(s int, msg *Msghdr, flags int) (err error)
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//sys Chown(path string, uid int, gid int) (err error)
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//sys Fchown(fd int, uid int, gid int) (err error)
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//sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
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//sys Fstatfs(fd int, buf *Statfs_t) (err error) = SYS_FSTATFS64
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//sysnb Getegid() (egid int)
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//sysnb Geteuid() (euid int)
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//sysnb Getgid() (gid int)
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//sysnb Getuid() (uid int)
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//sys Lchown(path string, uid int, gid int) (err error)
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//sys Listen(s int, n int) (err error)
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//sys Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64
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//sys Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64
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//sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT
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//sys Setfsgid(gid int) (err error)
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//sys Setfsuid(uid int) (err error)
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//sysnb Setgid(gid int) (err error)
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//sysnb Setregid(rgid int, egid int) (err error)
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//sysnb Setresgid(rgid int, egid int, sgid int) (err error)
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//sysnb Setresuid(ruid int, euid int, suid int) (err error)
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//sysnb Setreuid(ruid int, euid int) (err error)
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//sys Shutdown(fd int, how int) (err error)
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//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
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//sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64
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//sys Statfs(path string, buf *Statfs_t) (err error) = SYS_STATFS64
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// Vsyscalls on amd64.
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//sysnb Gettimeofday(tv *Timeval) (err error)
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//sysnb Time(t *Time_t) (tt Time_t, err error)
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//sys mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error)
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func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
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page := uintptr(offset / 4096)
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if offset != int64(page)*4096 {
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return 0, EINVAL
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}
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return mmap2(addr, length, prot, flags, fd, page)
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}
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// TODO(kaib): add support for tracing
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func (r *PtraceRegs) PC() uint64 { return 0 }
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func (r *PtraceRegs) SetPC(pc uint64) {}
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func (iov *Iovec) SetLen(length int) {
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iov.Len = uint32(length)
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}
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func (msghdr *Msghdr) SetControllen(length int) {
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msghdr.Controllen = uint32(length)
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}
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func (cmsg *Cmsghdr) SetLen(length int) {
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cmsg.Len = uint32(length)
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}
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