mirror of
https://github.com/golang/go
synced 2024-10-04 17:21:20 -06:00
af74dca497
On s390x char is unsigned. We cannot force it to be signed using -fsigned-char (see arm64) because the s390x gccgo API is already public and we need to stick as closely as possible to it to avoid breaking existing projects. In order to match the gccgo API we also force the RawSockaddr.Data and RawSockaddrUnix.Path fields to be signed. This CL adds a post-processing pass (mkpost.go) to mkall.sh in order to export the types of fields in PtraceRegs on s390x without affecting the API on other platforms. The types of these fields match their counterparts in gccgo. mkpost.go also cleans up the Pad_cgo* fields and X_* fields (these fields are not exported by gccgo currently). It could be extended to add build tags on platforms that need them. Change-Id: I66bdf5b86ec98af70baf666989027bb354df9e3e Reviewed-on: https://go-review.googlesource.com/20961 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
300 lines
8.4 KiB
Go
300 lines
8.4 KiB
Go
// Copyright 2016 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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const (
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_SYS_dup = SYS_DUP2
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_SYS_getdents = SYS_GETDENTS64
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)
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//sys Dup2(oldfd int, newfd 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)
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//sys Fstatfs(fd int, buf *Statfs_t) (err error)
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//sys Ftruncate(fd int, length int64) (err error)
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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 Getrlimit(resource int, rlim *Rlimit) (err error) = SYS_GETRLIMIT
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//sysnb Getuid() (uid int)
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//sysnb InotifyInit() (fd int, err error)
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//sys Lchown(path string, uid int, gid int) (err error)
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//sys Lstat(path string, stat *Stat_t) (err error)
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//sys Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
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//sys Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
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//sys Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
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//sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error)
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//sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
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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 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 Setrlimit(resource int, rlim *Rlimit) (err error)
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//sysnb Setreuid(ruid int, euid int) (err error)
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//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
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//sys Stat(path string, stat *Stat_t) (err error)
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//sys Statfs(path string, buf *Statfs_t) (err error)
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//sys SyncFileRange(fd int, off int64, n int64, flags int) (err error) = SYS_SYNC_FILE_RANGE
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//sys Truncate(path string, length int64) (err error)
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//sysnb getgroups(n int, list *_Gid_t) (nn int, err error)
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//sysnb setgroups(n int, list *_Gid_t) (err error)
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func Getpagesize() int { return 4096 }
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//sysnb Gettimeofday(tv *Timeval) (err error)
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func Time(t *Time_t) (tt Time_t, err error) {
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var tv Timeval
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err = Gettimeofday(&tv)
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if err != nil {
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return 0, err
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}
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if t != nil {
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*t = Time_t(tv.Sec)
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}
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return Time_t(tv.Sec), nil
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}
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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 = nsec / 1e9
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ts.Nsec = nsec % 1e9
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return
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}
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func TimevalToNsec(tv Timeval) int64 { return int64(tv.Sec)*1e9 + int64(tv.Usec)*1e3 }
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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 = nsec / 1e9
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tv.Usec = nsec % 1e9 / 1e3
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return
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}
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func Pipe(p []int) (err error) {
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if len(p) != 2 {
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return EINVAL
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}
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var pp [2]_C_int
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err = pipe2(&pp, 0)
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p[0] = int(pp[0])
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p[1] = int(pp[1])
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return
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}
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//sysnb pipe2(p *[2]_C_int, flags int) (err error)
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func Pipe2(p []int, flags int) (err error) {
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if len(p) != 2 {
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return EINVAL
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}
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var pp [2]_C_int
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err = pipe2(&pp, flags)
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p[0] = int(pp[0])
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p[1] = int(pp[1])
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return
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}
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// Linux on s390x uses the old mmap interface, which requires arguments to be passed in a struct.
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// mmap2 also requires arguments to be passed in a struct; it is currently not exposed in <asm/unistd.h>.
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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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mmap_args := [6]uintptr{addr, length, uintptr(prot), uintptr(flags), uintptr(fd), uintptr(offset)}
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r0, _, e1 := Syscall(SYS_MMAP, uintptr(unsafe.Pointer(&mmap_args[0])), 0, 0)
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use(unsafe.Pointer(&mmap_args[0]))
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xaddr = uintptr(r0)
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if e1 != 0 {
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err = errnoErr(e1)
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}
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return
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}
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// On s390x Linux, all the socket calls go through an extra indirection.
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// The arguments to the underlying system call are the number below
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// and a pointer to an array of uintptr. We hide the pointer in the
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// socketcall assembly to avoid allocation on every system call.
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const (
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// see linux/net.h
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_SOCKET = 1
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_BIND = 2
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_CONNECT = 3
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_LISTEN = 4
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_ACCEPT = 5
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_GETSOCKNAME = 6
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_GETPEERNAME = 7
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_SOCKETPAIR = 8
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_SEND = 9
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_RECV = 10
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_SENDTO = 11
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_RECVFROM = 12
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_SHUTDOWN = 13
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_SETSOCKOPT = 14
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_GETSOCKOPT = 15
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_SENDMSG = 16
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_RECVMSG = 17
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_ACCEPT4 = 18
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_RECVMMSG = 19
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_SENDMMSG = 20
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)
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func socketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (n int, err Errno)
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func rawsocketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (n int, err Errno)
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func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) {
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fd, e := socketcall(_ACCEPT, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0)
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if e != 0 {
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err = e
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}
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return
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}
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func accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error) {
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fd, e := socketcall(_ACCEPT4, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags), 0, 0)
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if e != 0 {
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err = e
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}
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return
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}
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func getsockname(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
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_, e := rawsocketcall(_GETSOCKNAME, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0)
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if e != 0 {
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err = e
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}
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return
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}
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func getpeername(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
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_, e := rawsocketcall(_GETPEERNAME, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0)
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if e != 0 {
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err = e
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}
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return
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}
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func socketpair(domain int, typ int, flags int, fd *[2]int32) (err error) {
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_, e := rawsocketcall(_SOCKETPAIR, uintptr(domain), uintptr(typ), uintptr(flags), uintptr(unsafe.Pointer(fd)), 0, 0)
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if e != 0 {
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err = e
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}
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return
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}
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func bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
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_, e := socketcall(_BIND, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0)
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if e != 0 {
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err = e
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}
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return
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}
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func connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
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_, e := socketcall(_CONNECT, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0)
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if e != 0 {
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err = e
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}
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return
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}
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func socket(domain int, typ int, proto int) (fd int, err error) {
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fd, e := rawsocketcall(_SOCKET, uintptr(domain), uintptr(typ), uintptr(proto), 0, 0, 0)
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if e != 0 {
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err = e
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}
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return
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}
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func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
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_, e := socketcall(_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
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if e != 0 {
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err = e
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}
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return
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}
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func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) {
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_, e := socketcall(_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), vallen, 0)
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if e != 0 {
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err = e
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}
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return
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}
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func recvfrom(s int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) {
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var base uintptr
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if len(p) > 0 {
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base = uintptr(unsafe.Pointer(&p[0]))
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}
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n, e := socketcall(_RECVFROM, uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen)))
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if e != 0 {
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err = e
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}
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return
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}
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func sendto(s int, p []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) {
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var base uintptr
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if len(p) > 0 {
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base = uintptr(unsafe.Pointer(&p[0]))
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}
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_, e := socketcall(_SENDTO, uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(to), uintptr(addrlen))
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if e != 0 {
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err = e
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}
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return
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}
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func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) {
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n, e := socketcall(_RECVMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0)
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if e != 0 {
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err = e
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}
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return
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}
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func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) {
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n, e := socketcall(_SENDMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0)
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if e != 0 {
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err = e
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}
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return
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}
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func Listen(s int, n int) (err error) {
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_, e := socketcall(_LISTEN, uintptr(s), uintptr(n), 0, 0, 0, 0)
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if e != 0 {
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err = e
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}
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return
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}
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func Shutdown(s, how int) (err error) {
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_, e := socketcall(_SHUTDOWN, uintptr(s), uintptr(how), 0, 0, 0, 0)
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if e != 0 {
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err = e
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}
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return
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}
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func (r *PtraceRegs) PC() uint64 { return r.Psw.Addr }
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func (r *PtraceRegs) SetPC(pc uint64) { r.Psw.Addr = pc }
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func (iov *Iovec) SetLen(length int) {
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iov.Len = uint64(length)
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}
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func (msghdr *Msghdr) SetControllen(length int) {
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msghdr.Controllen = uint64(length)
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}
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func (cmsg *Cmsghdr) SetLen(length int) {
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cmsg.Len = uint64(length)
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}
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