syscall_linux_s390x.go (9509B)
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 7 package unix 8 9 import ( 10 "unsafe" 11 ) 12 13 //sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) 14 //sys Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64 15 //sys Fchown(fd int, uid int, gid int) (err error) 16 //sys Fstat(fd int, stat *Stat_t) (err error) 17 //sys Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_NEWFSTATAT 18 //sys Fstatfs(fd int, buf *Statfs_t) (err error) 19 //sys Ftruncate(fd int, length int64) (err error) 20 //sysnb Getegid() (egid int) 21 //sysnb Geteuid() (euid int) 22 //sysnb Getgid() (gid int) 23 //sysnb Getrlimit(resource int, rlim *Rlimit) (err error) 24 //sysnb Getuid() (uid int) 25 //sys Lchown(path string, uid int, gid int) (err error) 26 //sys Lstat(path string, stat *Stat_t) (err error) 27 //sys Pause() (err error) 28 //sys pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64 29 //sys pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64 30 //sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) 31 //sys Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK 32 //sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) 33 //sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) 34 //sys setfsgid(gid int) (prev int, err error) 35 //sys setfsuid(uid int) (prev int, err error) 36 //sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error) 37 //sys Stat(path string, stat *Stat_t) (err error) 38 //sys Statfs(path string, buf *Statfs_t) (err error) 39 //sys SyncFileRange(fd int, off int64, n int64, flags int) (err error) 40 //sys Truncate(path string, length int64) (err error) 41 //sys Ustat(dev int, ubuf *Ustat_t) (err error) 42 //sysnb getgroups(n int, list *_Gid_t) (nn int, err error) 43 //sysnb setgroups(n int, list *_Gid_t) (err error) 44 45 //sys futimesat(dirfd int, path string, times *[2]Timeval) (err error) 46 //sysnb Gettimeofday(tv *Timeval) (err error) 47 48 func Time(t *Time_t) (tt Time_t, err error) { 49 var tv Timeval 50 err = Gettimeofday(&tv) 51 if err != nil { 52 return 0, err 53 } 54 if t != nil { 55 *t = Time_t(tv.Sec) 56 } 57 return Time_t(tv.Sec), nil 58 } 59 60 //sys Utime(path string, buf *Utimbuf) (err error) 61 //sys utimes(path string, times *[2]Timeval) (err error) 62 63 func setTimespec(sec, nsec int64) Timespec { 64 return Timespec{Sec: sec, Nsec: nsec} 65 } 66 67 func setTimeval(sec, usec int64) Timeval { 68 return Timeval{Sec: sec, Usec: usec} 69 } 70 71 func Ioperm(from int, num int, on int) (err error) { 72 return ENOSYS 73 } 74 75 func Iopl(level int) (err error) { 76 return ENOSYS 77 } 78 79 func (r *PtraceRegs) PC() uint64 { return r.Psw.Addr } 80 81 func (r *PtraceRegs) SetPC(pc uint64) { r.Psw.Addr = pc } 82 83 func (iov *Iovec) SetLen(length int) { 84 iov.Len = uint64(length) 85 } 86 87 func (msghdr *Msghdr) SetControllen(length int) { 88 msghdr.Controllen = uint64(length) 89 } 90 91 func (msghdr *Msghdr) SetIovlen(length int) { 92 msghdr.Iovlen = uint64(length) 93 } 94 95 func (cmsg *Cmsghdr) SetLen(length int) { 96 cmsg.Len = uint64(length) 97 } 98 99 func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) { 100 rsa.Service_name_len = uint64(length) 101 } 102 103 // Linux on s390x uses the old mmap interface, which requires arguments to be passed in a struct. 104 // mmap2 also requires arguments to be passed in a struct; it is currently not exposed in <asm/unistd.h>. 105 func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) { 106 mmap_args := [6]uintptr{addr, length, uintptr(prot), uintptr(flags), uintptr(fd), uintptr(offset)} 107 r0, _, e1 := Syscall(SYS_MMAP, uintptr(unsafe.Pointer(&mmap_args[0])), 0, 0) 108 xaddr = uintptr(r0) 109 if e1 != 0 { 110 err = errnoErr(e1) 111 } 112 return 113 } 114 115 // On s390x Linux, all the socket calls go through an extra indirection. 116 // The arguments to the underlying system call (SYS_SOCKETCALL) are the 117 // number below and a pointer to an array of uintptr. 118 const ( 119 // see linux/net.h 120 netSocket = 1 121 netBind = 2 122 netConnect = 3 123 netListen = 4 124 netAccept = 5 125 netGetSockName = 6 126 netGetPeerName = 7 127 netSocketPair = 8 128 netSend = 9 129 netRecv = 10 130 netSendTo = 11 131 netRecvFrom = 12 132 netShutdown = 13 133 netSetSockOpt = 14 134 netGetSockOpt = 15 135 netSendMsg = 16 136 netRecvMsg = 17 137 netAccept4 = 18 138 netRecvMMsg = 19 139 netSendMMsg = 20 140 ) 141 142 func accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (int, error) { 143 args := [4]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags)} 144 fd, _, err := Syscall(SYS_SOCKETCALL, netAccept4, uintptr(unsafe.Pointer(&args)), 0) 145 if err != 0 { 146 return 0, err 147 } 148 return int(fd), nil 149 } 150 151 func getsockname(s int, rsa *RawSockaddrAny, addrlen *_Socklen) error { 152 args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))} 153 _, _, err := RawSyscall(SYS_SOCKETCALL, netGetSockName, uintptr(unsafe.Pointer(&args)), 0) 154 if err != 0 { 155 return err 156 } 157 return nil 158 } 159 160 func getpeername(s int, rsa *RawSockaddrAny, addrlen *_Socklen) error { 161 args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))} 162 _, _, err := RawSyscall(SYS_SOCKETCALL, netGetPeerName, uintptr(unsafe.Pointer(&args)), 0) 163 if err != 0 { 164 return err 165 } 166 return nil 167 } 168 169 func socketpair(domain int, typ int, flags int, fd *[2]int32) error { 170 args := [4]uintptr{uintptr(domain), uintptr(typ), uintptr(flags), uintptr(unsafe.Pointer(fd))} 171 _, _, err := RawSyscall(SYS_SOCKETCALL, netSocketPair, uintptr(unsafe.Pointer(&args)), 0) 172 if err != 0 { 173 return err 174 } 175 return nil 176 } 177 178 func bind(s int, addr unsafe.Pointer, addrlen _Socklen) error { 179 args := [3]uintptr{uintptr(s), uintptr(addr), uintptr(addrlen)} 180 _, _, err := Syscall(SYS_SOCKETCALL, netBind, uintptr(unsafe.Pointer(&args)), 0) 181 if err != 0 { 182 return err 183 } 184 return nil 185 } 186 187 func connect(s int, addr unsafe.Pointer, addrlen _Socklen) error { 188 args := [3]uintptr{uintptr(s), uintptr(addr), uintptr(addrlen)} 189 _, _, err := Syscall(SYS_SOCKETCALL, netConnect, uintptr(unsafe.Pointer(&args)), 0) 190 if err != 0 { 191 return err 192 } 193 return nil 194 } 195 196 func socket(domain int, typ int, proto int) (int, error) { 197 args := [3]uintptr{uintptr(domain), uintptr(typ), uintptr(proto)} 198 fd, _, err := RawSyscall(SYS_SOCKETCALL, netSocket, uintptr(unsafe.Pointer(&args)), 0) 199 if err != 0 { 200 return 0, err 201 } 202 return int(fd), nil 203 } 204 205 func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) error { 206 args := [5]uintptr{uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen))} 207 _, _, err := Syscall(SYS_SOCKETCALL, netGetSockOpt, uintptr(unsafe.Pointer(&args)), 0) 208 if err != 0 { 209 return err 210 } 211 return nil 212 } 213 214 func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) error { 215 args := [5]uintptr{uintptr(s), uintptr(level), uintptr(name), uintptr(val), vallen} 216 _, _, err := Syscall(SYS_SOCKETCALL, netSetSockOpt, uintptr(unsafe.Pointer(&args)), 0) 217 if err != 0 { 218 return err 219 } 220 return nil 221 } 222 223 func recvfrom(s int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (int, error) { 224 var base uintptr 225 if len(p) > 0 { 226 base = uintptr(unsafe.Pointer(&p[0])) 227 } 228 args := [6]uintptr{uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen))} 229 n, _, err := Syscall(SYS_SOCKETCALL, netRecvFrom, uintptr(unsafe.Pointer(&args)), 0) 230 if err != 0 { 231 return 0, err 232 } 233 return int(n), nil 234 } 235 236 func sendto(s int, p []byte, flags int, to unsafe.Pointer, addrlen _Socklen) error { 237 var base uintptr 238 if len(p) > 0 { 239 base = uintptr(unsafe.Pointer(&p[0])) 240 } 241 args := [6]uintptr{uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(to), uintptr(addrlen)} 242 _, _, err := Syscall(SYS_SOCKETCALL, netSendTo, uintptr(unsafe.Pointer(&args)), 0) 243 if err != 0 { 244 return err 245 } 246 return nil 247 } 248 249 func recvmsg(s int, msg *Msghdr, flags int) (int, error) { 250 args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags)} 251 n, _, err := Syscall(SYS_SOCKETCALL, netRecvMsg, uintptr(unsafe.Pointer(&args)), 0) 252 if err != 0 { 253 return 0, err 254 } 255 return int(n), nil 256 } 257 258 func sendmsg(s int, msg *Msghdr, flags int) (int, error) { 259 args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags)} 260 n, _, err := Syscall(SYS_SOCKETCALL, netSendMsg, uintptr(unsafe.Pointer(&args)), 0) 261 if err != 0 { 262 return 0, err 263 } 264 return int(n), nil 265 } 266 267 func Listen(s int, n int) error { 268 args := [2]uintptr{uintptr(s), uintptr(n)} 269 _, _, err := Syscall(SYS_SOCKETCALL, netListen, uintptr(unsafe.Pointer(&args)), 0) 270 if err != 0 { 271 return err 272 } 273 return nil 274 } 275 276 func Shutdown(s, how int) error { 277 args := [2]uintptr{uintptr(s), uintptr(how)} 278 _, _, err := Syscall(SYS_SOCKETCALL, netShutdown, uintptr(unsafe.Pointer(&args)), 0) 279 if err != 0 { 280 return err 281 } 282 return nil 283 } 284 285 //sys kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error) 286 287 func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error { 288 cmdlineLen := len(cmdline) 289 if cmdlineLen > 0 { 290 // Account for the additional NULL byte added by 291 // BytePtrFromString in kexecFileLoad. The kexec_file_load 292 // syscall expects a NULL-terminated string. 293 cmdlineLen++ 294 } 295 return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags) 296 }