syscall_linux_s390x.go (9807B)
1 // Copyright 2016 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 s390x && linux 6 // +build s390x,linux 7 8 package unix 9 10 import ( 11 "unsafe" 12 ) 13 14 //sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) 15 //sys Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64 16 //sys Fchown(fd int, uid int, gid int) (err error) 17 //sys Fstat(fd int, stat *Stat_t) (err error) 18 //sys Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_NEWFSTATAT 19 //sys Fstatfs(fd int, buf *Statfs_t) (err error) 20 //sys Ftruncate(fd int, length int64) (err error) 21 //sysnb Getegid() (egid int) 22 //sysnb Geteuid() (euid int) 23 //sysnb Getgid() (gid int) 24 //sysnb Getrlimit(resource int, rlim *Rlimit) (err error) 25 //sysnb Getuid() (uid int) 26 //sys Lchown(path string, uid int, gid int) (err error) 27 //sys Lstat(path string, stat *Stat_t) (err error) 28 //sys Pause() (err error) 29 //sys pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64 30 //sys pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64 31 //sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) 32 //sys Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK 33 //sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) 34 //sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) 35 //sys setfsgid(gid int) (prev int, err error) 36 //sys setfsuid(uid int) (prev int, err error) 37 //sysnb Setregid(rgid int, egid int) (err error) 38 //sysnb Setresgid(rgid int, egid int, sgid int) (err error) 39 //sysnb Setresuid(ruid int, euid int, suid int) (err error) 40 //sysnb Setrlimit(resource int, rlim *Rlimit) (err error) 41 //sysnb Setreuid(ruid int, euid int) (err error) 42 //sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error) 43 //sys Stat(path string, stat *Stat_t) (err error) 44 //sys Statfs(path string, buf *Statfs_t) (err error) 45 //sys SyncFileRange(fd int, off int64, n int64, flags int) (err error) 46 //sys Truncate(path string, length int64) (err error) 47 //sys Ustat(dev int, ubuf *Ustat_t) (err error) 48 //sysnb getgroups(n int, list *_Gid_t) (nn int, err error) 49 //sysnb setgroups(n int, list *_Gid_t) (err error) 50 51 //sys futimesat(dirfd int, path string, times *[2]Timeval) (err error) 52 //sysnb Gettimeofday(tv *Timeval) (err error) 53 54 func Time(t *Time_t) (tt Time_t, err error) { 55 var tv Timeval 56 err = Gettimeofday(&tv) 57 if err != nil { 58 return 0, err 59 } 60 if t != nil { 61 *t = Time_t(tv.Sec) 62 } 63 return Time_t(tv.Sec), nil 64 } 65 66 //sys Utime(path string, buf *Utimbuf) (err error) 67 //sys utimes(path string, times *[2]Timeval) (err error) 68 69 func setTimespec(sec, nsec int64) Timespec { 70 return Timespec{Sec: sec, Nsec: nsec} 71 } 72 73 func setTimeval(sec, usec int64) Timeval { 74 return Timeval{Sec: sec, Usec: usec} 75 } 76 77 func Ioperm(from int, num int, on int) (err error) { 78 return ENOSYS 79 } 80 81 func Iopl(level int) (err error) { 82 return ENOSYS 83 } 84 85 func (r *PtraceRegs) PC() uint64 { return r.Psw.Addr } 86 87 func (r *PtraceRegs) SetPC(pc uint64) { r.Psw.Addr = pc } 88 89 func (iov *Iovec) SetLen(length int) { 90 iov.Len = uint64(length) 91 } 92 93 func (msghdr *Msghdr) SetControllen(length int) { 94 msghdr.Controllen = uint64(length) 95 } 96 97 func (msghdr *Msghdr) SetIovlen(length int) { 98 msghdr.Iovlen = uint64(length) 99 } 100 101 func (cmsg *Cmsghdr) SetLen(length int) { 102 cmsg.Len = uint64(length) 103 } 104 105 func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) { 106 rsa.Service_name_len = uint64(length) 107 } 108 109 // Linux on s390x uses the old mmap interface, which requires arguments to be passed in a struct. 110 // mmap2 also requires arguments to be passed in a struct; it is currently not exposed in <asm/unistd.h>. 111 func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) { 112 mmap_args := [6]uintptr{addr, length, uintptr(prot), uintptr(flags), uintptr(fd), uintptr(offset)} 113 r0, _, e1 := Syscall(SYS_MMAP, uintptr(unsafe.Pointer(&mmap_args[0])), 0, 0) 114 xaddr = uintptr(r0) 115 if e1 != 0 { 116 err = errnoErr(e1) 117 } 118 return 119 } 120 121 // On s390x Linux, all the socket calls go through an extra indirection. 122 // The arguments to the underlying system call (SYS_SOCKETCALL) are the 123 // number below and a pointer to an array of uintptr. 124 const ( 125 // see linux/net.h 126 netSocket = 1 127 netBind = 2 128 netConnect = 3 129 netListen = 4 130 netAccept = 5 131 netGetSockName = 6 132 netGetPeerName = 7 133 netSocketPair = 8 134 netSend = 9 135 netRecv = 10 136 netSendTo = 11 137 netRecvFrom = 12 138 netShutdown = 13 139 netSetSockOpt = 14 140 netGetSockOpt = 15 141 netSendMsg = 16 142 netRecvMsg = 17 143 netAccept4 = 18 144 netRecvMMsg = 19 145 netSendMMsg = 20 146 ) 147 148 func accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (int, error) { 149 args := [4]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags)} 150 fd, _, err := Syscall(SYS_SOCKETCALL, netAccept4, uintptr(unsafe.Pointer(&args)), 0) 151 if err != 0 { 152 return 0, err 153 } 154 return int(fd), nil 155 } 156 157 func getsockname(s int, rsa *RawSockaddrAny, addrlen *_Socklen) error { 158 args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))} 159 _, _, err := RawSyscall(SYS_SOCKETCALL, netGetSockName, uintptr(unsafe.Pointer(&args)), 0) 160 if err != 0 { 161 return err 162 } 163 return nil 164 } 165 166 func getpeername(s int, rsa *RawSockaddrAny, addrlen *_Socklen) error { 167 args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))} 168 _, _, err := RawSyscall(SYS_SOCKETCALL, netGetPeerName, uintptr(unsafe.Pointer(&args)), 0) 169 if err != 0 { 170 return err 171 } 172 return nil 173 } 174 175 func socketpair(domain int, typ int, flags int, fd *[2]int32) error { 176 args := [4]uintptr{uintptr(domain), uintptr(typ), uintptr(flags), uintptr(unsafe.Pointer(fd))} 177 _, _, err := RawSyscall(SYS_SOCKETCALL, netSocketPair, uintptr(unsafe.Pointer(&args)), 0) 178 if err != 0 { 179 return err 180 } 181 return nil 182 } 183 184 func bind(s int, addr unsafe.Pointer, addrlen _Socklen) error { 185 args := [3]uintptr{uintptr(s), uintptr(addr), uintptr(addrlen)} 186 _, _, err := Syscall(SYS_SOCKETCALL, netBind, uintptr(unsafe.Pointer(&args)), 0) 187 if err != 0 { 188 return err 189 } 190 return nil 191 } 192 193 func connect(s int, addr unsafe.Pointer, addrlen _Socklen) error { 194 args := [3]uintptr{uintptr(s), uintptr(addr), uintptr(addrlen)} 195 _, _, err := Syscall(SYS_SOCKETCALL, netConnect, uintptr(unsafe.Pointer(&args)), 0) 196 if err != 0 { 197 return err 198 } 199 return nil 200 } 201 202 func socket(domain int, typ int, proto int) (int, error) { 203 args := [3]uintptr{uintptr(domain), uintptr(typ), uintptr(proto)} 204 fd, _, err := RawSyscall(SYS_SOCKETCALL, netSocket, uintptr(unsafe.Pointer(&args)), 0) 205 if err != 0 { 206 return 0, err 207 } 208 return int(fd), nil 209 } 210 211 func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) error { 212 args := [5]uintptr{uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen))} 213 _, _, err := Syscall(SYS_SOCKETCALL, netGetSockOpt, uintptr(unsafe.Pointer(&args)), 0) 214 if err != 0 { 215 return err 216 } 217 return nil 218 } 219 220 func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) error { 221 args := [5]uintptr{uintptr(s), uintptr(level), uintptr(name), uintptr(val), vallen} 222 _, _, err := Syscall(SYS_SOCKETCALL, netSetSockOpt, uintptr(unsafe.Pointer(&args)), 0) 223 if err != 0 { 224 return err 225 } 226 return nil 227 } 228 229 func recvfrom(s int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (int, error) { 230 var base uintptr 231 if len(p) > 0 { 232 base = uintptr(unsafe.Pointer(&p[0])) 233 } 234 args := [6]uintptr{uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen))} 235 n, _, err := Syscall(SYS_SOCKETCALL, netRecvFrom, uintptr(unsafe.Pointer(&args)), 0) 236 if err != 0 { 237 return 0, err 238 } 239 return int(n), nil 240 } 241 242 func sendto(s int, p []byte, flags int, to unsafe.Pointer, addrlen _Socklen) error { 243 var base uintptr 244 if len(p) > 0 { 245 base = uintptr(unsafe.Pointer(&p[0])) 246 } 247 args := [6]uintptr{uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(to), uintptr(addrlen)} 248 _, _, err := Syscall(SYS_SOCKETCALL, netSendTo, uintptr(unsafe.Pointer(&args)), 0) 249 if err != 0 { 250 return err 251 } 252 return nil 253 } 254 255 func recvmsg(s int, msg *Msghdr, flags int) (int, error) { 256 args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags)} 257 n, _, err := Syscall(SYS_SOCKETCALL, netRecvMsg, uintptr(unsafe.Pointer(&args)), 0) 258 if err != 0 { 259 return 0, err 260 } 261 return int(n), nil 262 } 263 264 func sendmsg(s int, msg *Msghdr, flags int) (int, error) { 265 args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags)} 266 n, _, err := Syscall(SYS_SOCKETCALL, netSendMsg, uintptr(unsafe.Pointer(&args)), 0) 267 if err != 0 { 268 return 0, err 269 } 270 return int(n), nil 271 } 272 273 func Listen(s int, n int) error { 274 args := [2]uintptr{uintptr(s), uintptr(n)} 275 _, _, err := Syscall(SYS_SOCKETCALL, netListen, uintptr(unsafe.Pointer(&args)), 0) 276 if err != 0 { 277 return err 278 } 279 return nil 280 } 281 282 func Shutdown(s, how int) error { 283 args := [2]uintptr{uintptr(s), uintptr(how)} 284 _, _, err := Syscall(SYS_SOCKETCALL, netShutdown, uintptr(unsafe.Pointer(&args)), 0) 285 if err != 0 { 286 return err 287 } 288 return nil 289 } 290 291 //sys kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error) 292 293 func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error { 294 cmdlineLen := len(cmdline) 295 if cmdlineLen > 0 { 296 // Account for the additional NULL byte added by 297 // BytePtrFromString in kexecFileLoad. The kexec_file_load 298 // syscall expects a NULL-terminated string. 299 cmdlineLen++ 300 } 301 return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags) 302 }