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syscall_linux_386.go
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syscall_linux_386.go
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// Copyright 2009 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.
//go:build 386 && linux
// +build 386,linux
package unix
import (
"unsafe"
)
func setTimespec(sec, nsec int64) Timespec {
return Timespec{Sec: int32(sec), Nsec: int32(nsec)}
}
func setTimeval(sec, usec int64) Timeval {
return Timeval{Sec: int32(sec), Usec: int32(usec)}
}
// 64-bit file system and 32-bit uid calls
// (386 default is 32-bit file system and 16-bit uid).
//sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
//sys Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64_64
//sys Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32
//sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
//sys Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64
//sys Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64
//sysnb Getegid() (egid int) = SYS_GETEGID32
//sysnb Geteuid() (euid int) = SYS_GETEUID32
//sysnb Getgid() (gid int) = SYS_GETGID32
//sysnb Getuid() (uid int) = SYS_GETUID32
//sys Ioperm(from int, num int, on int) (err error)
//sys Iopl(level int) (err error)
//sys Lchown(path string, uid int, gid int) (err error) = SYS_LCHOWN32
//sys Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64
//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 sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64
//sys setfsgid(gid int) (prev int, err error) = SYS_SETFSGID32
//sys setfsuid(uid int) (prev int, err error) = SYS_SETFSUID32
//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
//sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64
//sys SyncFileRange(fd int, off int64, n int64, flags int) (err error)
//sys Truncate(path string, length int64) (err error) = SYS_TRUNCATE64
//sys Ustat(dev int, ubuf *Ustat_t) (err error)
//sysnb getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32
//sysnb setgroups(n int, list *_Gid_t) (err error) = SYS_SETGROUPS32
//sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT
//sys mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error)
//sys Pause() (err error)
func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
page := uintptr(offset / 4096)
if offset != int64(page)*4096 {
return 0, EINVAL
}
return mmap2(addr, length, prot, flags, fd, page)
}
type rlimit32 struct {
Cur uint32
Max uint32
}
//sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_GETRLIMIT
const rlimInf32 = ^uint32(0)
const rlimInf64 = ^uint64(0)
func Getrlimit(resource int, rlim *Rlimit) (err error) {
err = Prlimit(0, resource, nil, rlim)
if err != ENOSYS {
return err
}
rl := rlimit32{}
err = getrlimit(resource, &rl)
if err != nil {
return
}
if rl.Cur == rlimInf32 {
rlim.Cur = rlimInf64
} else {
rlim.Cur = uint64(rl.Cur)
}
if rl.Max == rlimInf32 {
rlim.Max = rlimInf64
} else {
rlim.Max = uint64(rl.Max)
}
return
}
//sysnb setrlimit(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT
func Setrlimit(resource int, rlim *Rlimit) (err error) {
err = Prlimit(0, resource, rlim, nil)
if err != ENOSYS {
return err
}
rl := rlimit32{}
if rlim.Cur == rlimInf64 {
rl.Cur = rlimInf32
} else if rlim.Cur < uint64(rlimInf32) {
rl.Cur = uint32(rlim.Cur)
} else {
return EINVAL
}
if rlim.Max == rlimInf64 {
rl.Max = rlimInf32
} else if rlim.Max < uint64(rlimInf32) {
rl.Max = uint32(rlim.Max)
} else {
return EINVAL
}
return setrlimit(resource, &rl)
}
func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
newoffset, errno := seek(fd, offset, whence)
if errno != 0 {
return 0, errno
}
return newoffset, nil
}
//sys futimesat(dirfd int, path string, times *[2]Timeval) (err error)
//sysnb Gettimeofday(tv *Timeval) (err error)
//sysnb Time(t *Time_t) (tt Time_t, err error)
//sys Utime(path string, buf *Utimbuf) (err error)
//sys utimes(path string, times *[2]Timeval) (err error)
// On x86 Linux, all the socket calls go through an extra indirection,
// I think because the 5-register system call interface can't handle
// the 6-argument calls like sendto and recvfrom. Instead the
// arguments to the underlying system call are the number below
// and a pointer to an array of uintptr. We hide the pointer in the
// socketcall assembly to avoid allocation on every system call.
const (
// see linux/net.h
_SOCKET = 1
_BIND = 2
_CONNECT = 3
_LISTEN = 4
_ACCEPT = 5
_GETSOCKNAME = 6
_GETPEERNAME = 7
_SOCKETPAIR = 8
_SEND = 9
_RECV = 10
_SENDTO = 11
_RECVFROM = 12
_SHUTDOWN = 13
_SETSOCKOPT = 14
_GETSOCKOPT = 15
_SENDMSG = 16
_RECVMSG = 17
_ACCEPT4 = 18
_RECVMMSG = 19
_SENDMMSG = 20
)
func accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error) {
fd, e := socketcall(_ACCEPT4, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags), 0, 0)
if e != 0 {
err = e
}
return
}
func getsockname(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
_, e := rawsocketcall(_GETSOCKNAME, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0)
if e != 0 {
err = e
}
return
}
func getpeername(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
_, e := rawsocketcall(_GETPEERNAME, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0)
if e != 0 {
err = e
}
return
}
func socketpair(domain int, typ int, flags int, fd *[2]int32) (err error) {
_, e := rawsocketcall(_SOCKETPAIR, uintptr(domain), uintptr(typ), uintptr(flags), uintptr(unsafe.Pointer(fd)), 0, 0)
if e != 0 {
err = e
}
return
}
func bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
_, e := socketcall(_BIND, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0)
if e != 0 {
err = e
}
return
}
func connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) {
_, e := socketcall(_CONNECT, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0)
if e != 0 {
err = e
}
return
}
func socket(domain int, typ int, proto int) (fd int, err error) {
fd, e := rawsocketcall(_SOCKET, uintptr(domain), uintptr(typ), uintptr(proto), 0, 0, 0)
if e != 0 {
err = e
}
return
}
func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) {
_, e := socketcall(_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
if e != 0 {
err = e
}
return
}
func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) {
_, e := socketcall(_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), vallen, 0)
if e != 0 {
err = e
}
return
}
func recvfrom(s int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) {
var base uintptr
if len(p) > 0 {
base = uintptr(unsafe.Pointer(&p[0]))
}
n, e := socketcall(_RECVFROM, uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen)))
if e != 0 {
err = e
}
return
}
func sendto(s int, p []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) {
var base uintptr
if len(p) > 0 {
base = uintptr(unsafe.Pointer(&p[0]))
}
_, e := socketcall(_SENDTO, uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(to), uintptr(addrlen))
if e != 0 {
err = e
}
return
}
func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) {
n, e := socketcall(_RECVMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0)
if e != 0 {
err = e
}
return
}
func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) {
n, e := socketcall(_SENDMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0)
if e != 0 {
err = e
}
return
}
func Listen(s int, n int) (err error) {
_, e := socketcall(_LISTEN, uintptr(s), uintptr(n), 0, 0, 0, 0)
if e != 0 {
err = e
}
return
}
func Shutdown(s, how int) (err error) {
_, e := socketcall(_SHUTDOWN, uintptr(s), uintptr(how), 0, 0, 0, 0)
if e != 0 {
err = e
}
return
}
func Fstatfs(fd int, buf *Statfs_t) (err error) {
_, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
if e != 0 {
err = e
}
return
}
func Statfs(path string, buf *Statfs_t) (err error) {
pathp, err := BytePtrFromString(path)
if err != nil {
return err
}
_, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
if e != 0 {
err = e
}
return
}
func (r *PtraceRegs) PC() uint64 { return uint64(uint32(r.Eip)) }
func (r *PtraceRegs) SetPC(pc uint64) { r.Eip = int32(pc) }
func (iov *Iovec) SetLen(length int) {
iov.Len = uint32(length)
}
func (msghdr *Msghdr) SetControllen(length int) {
msghdr.Controllen = uint32(length)
}
func (msghdr *Msghdr) SetIovlen(length int) {
msghdr.Iovlen = uint32(length)
}
func (cmsg *Cmsghdr) SetLen(length int) {
cmsg.Len = uint32(length)
}
func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
rsa.Service_name_len = uint32(length)
}

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