syscall_linux_s390x.go (9433B)
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 Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64 14 //sys Fchown(fd int, uid int, gid int) (err error) 15 //sys Fstat(fd int, stat *Stat_t) (err error) 16 //sys Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_NEWFSTATAT 17 //sys Fstatfs(fd int, buf *Statfs_t) (err error) 18 //sys Ftruncate(fd int, length int64) (err error) 19 //sysnb Getegid() (egid int) 20 //sysnb Geteuid() (euid int) 21 //sysnb Getgid() (gid int) 22 //sysnb Getrlimit(resource int, rlim *Rlimit) (err error) 23 //sysnb Getuid() (uid int) 24 //sys Lchown(path string, uid int, gid int) (err error) 25 //sys Lstat(path string, stat *Stat_t) (err error) 26 //sys Pause() (err error) 27 //sys pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64 28 //sys pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64 29 //sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) 30 //sys Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK 31 //sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) 32 //sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) 33 //sys setfsgid(gid int) (prev int, err error) 34 //sys setfsuid(uid int) (prev int, err error) 35 //sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error) 36 //sys Stat(path string, stat *Stat_t) (err error) 37 //sys Statfs(path string, buf *Statfs_t) (err error) 38 //sys SyncFileRange(fd int, off int64, n int64, flags int) (err error) 39 //sys Truncate(path string, length int64) (err error) 40 //sys Ustat(dev int, ubuf *Ustat_t) (err error) 41 //sysnb getgroups(n int, list *_Gid_t) (nn int, err error) 42 //sysnb setgroups(n int, list *_Gid_t) (err error) 43 44 //sys futimesat(dirfd int, path string, times *[2]Timeval) (err error) 45 //sysnb Gettimeofday(tv *Timeval) (err error) 46 47 func Time(t *Time_t) (tt Time_t, err error) { 48 var tv Timeval 49 err = Gettimeofday(&tv) 50 if err != nil { 51 return 0, err 52 } 53 if t != nil { 54 *t = Time_t(tv.Sec) 55 } 56 return Time_t(tv.Sec), nil 57 } 58 59 //sys Utime(path string, buf *Utimbuf) (err error) 60 //sys utimes(path string, times *[2]Timeval) (err error) 61 62 func setTimespec(sec, nsec int64) Timespec { 63 return Timespec{Sec: sec, Nsec: nsec} 64 } 65 66 func setTimeval(sec, usec int64) Timeval { 67 return Timeval{Sec: sec, Usec: usec} 68 } 69 70 func Ioperm(from int, num int, on int) (err error) { 71 return ENOSYS 72 } 73 74 func Iopl(level int) (err error) { 75 return ENOSYS 76 } 77 78 func (r *PtraceRegs) PC() uint64 { return r.Psw.Addr } 79 80 func (r *PtraceRegs) SetPC(pc uint64) { r.Psw.Addr = pc } 81 82 func (iov *Iovec) SetLen(length int) { 83 iov.Len = uint64(length) 84 } 85 86 func (msghdr *Msghdr) SetControllen(length int) { 87 msghdr.Controllen = uint64(length) 88 } 89 90 func (msghdr *Msghdr) SetIovlen(length int) { 91 msghdr.Iovlen = uint64(length) 92 } 93 94 func (cmsg *Cmsghdr) SetLen(length int) { 95 cmsg.Len = uint64(length) 96 } 97 98 func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) { 99 rsa.Service_name_len = uint64(length) 100 } 101 102 // Linux on s390x uses the old mmap interface, which requires arguments to be passed in a struct. 103 // mmap2 also requires arguments to be passed in a struct; it is currently not exposed in <asm/unistd.h>. 104 func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) { 105 mmap_args := [6]uintptr{addr, length, uintptr(prot), uintptr(flags), uintptr(fd), uintptr(offset)} 106 r0, _, e1 := Syscall(SYS_MMAP, uintptr(unsafe.Pointer(&mmap_args[0])), 0, 0) 107 xaddr = uintptr(r0) 108 if e1 != 0 { 109 err = errnoErr(e1) 110 } 111 return 112 } 113 114 // On s390x Linux, all the socket calls go through an extra indirection. 115 // The arguments to the underlying system call (SYS_SOCKETCALL) are the 116 // number below and a pointer to an array of uintptr. 117 const ( 118 // see linux/net.h 119 netSocket = 1 120 netBind = 2 121 netConnect = 3 122 netListen = 4 123 netAccept = 5 124 netGetSockName = 6 125 netGetPeerName = 7 126 netSocketPair = 8 127 netSend = 9 128 netRecv = 10 129 netSendTo = 11 130 netRecvFrom = 12 131 netShutdown = 13 132 netSetSockOpt = 14 133 netGetSockOpt = 15 134 netSendMsg = 16 135 netRecvMsg = 17 136 netAccept4 = 18 137 netRecvMMsg = 19 138 netSendMMsg = 20 139 ) 140 141 func accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (int, error) { 142 args := [4]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags)} 143 fd, _, err := Syscall(SYS_SOCKETCALL, netAccept4, uintptr(unsafe.Pointer(&args)), 0) 144 if err != 0 { 145 return 0, err 146 } 147 return int(fd), nil 148 } 149 150 func getsockname(s int, rsa *RawSockaddrAny, addrlen *_Socklen) error { 151 args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))} 152 _, _, err := RawSyscall(SYS_SOCKETCALL, netGetSockName, uintptr(unsafe.Pointer(&args)), 0) 153 if err != 0 { 154 return err 155 } 156 return nil 157 } 158 159 func getpeername(s int, rsa *RawSockaddrAny, addrlen *_Socklen) error { 160 args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))} 161 _, _, err := RawSyscall(SYS_SOCKETCALL, netGetPeerName, uintptr(unsafe.Pointer(&args)), 0) 162 if err != 0 { 163 return err 164 } 165 return nil 166 } 167 168 func socketpair(domain int, typ int, flags int, fd *[2]int32) error { 169 args := [4]uintptr{uintptr(domain), uintptr(typ), uintptr(flags), uintptr(unsafe.Pointer(fd))} 170 _, _, err := RawSyscall(SYS_SOCKETCALL, netSocketPair, uintptr(unsafe.Pointer(&args)), 0) 171 if err != 0 { 172 return err 173 } 174 return nil 175 } 176 177 func bind(s int, addr unsafe.Pointer, addrlen _Socklen) error { 178 args := [3]uintptr{uintptr(s), uintptr(addr), uintptr(addrlen)} 179 _, _, err := Syscall(SYS_SOCKETCALL, netBind, uintptr(unsafe.Pointer(&args)), 0) 180 if err != 0 { 181 return err 182 } 183 return nil 184 } 185 186 func connect(s int, addr unsafe.Pointer, addrlen _Socklen) error { 187 args := [3]uintptr{uintptr(s), uintptr(addr), uintptr(addrlen)} 188 _, _, err := Syscall(SYS_SOCKETCALL, netConnect, uintptr(unsafe.Pointer(&args)), 0) 189 if err != 0 { 190 return err 191 } 192 return nil 193 } 194 195 func socket(domain int, typ int, proto int) (int, error) { 196 args := [3]uintptr{uintptr(domain), uintptr(typ), uintptr(proto)} 197 fd, _, err := RawSyscall(SYS_SOCKETCALL, netSocket, uintptr(unsafe.Pointer(&args)), 0) 198 if err != 0 { 199 return 0, err 200 } 201 return int(fd), nil 202 } 203 204 func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) error { 205 args := [5]uintptr{uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen))} 206 _, _, err := Syscall(SYS_SOCKETCALL, netGetSockOpt, uintptr(unsafe.Pointer(&args)), 0) 207 if err != 0 { 208 return err 209 } 210 return nil 211 } 212 213 func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) error { 214 args := [5]uintptr{uintptr(s), uintptr(level), uintptr(name), uintptr(val), vallen} 215 _, _, err := Syscall(SYS_SOCKETCALL, netSetSockOpt, uintptr(unsafe.Pointer(&args)), 0) 216 if err != 0 { 217 return err 218 } 219 return nil 220 } 221 222 func recvfrom(s int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (int, error) { 223 var base uintptr 224 if len(p) > 0 { 225 base = uintptr(unsafe.Pointer(&p[0])) 226 } 227 args := [6]uintptr{uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen))} 228 n, _, err := Syscall(SYS_SOCKETCALL, netRecvFrom, uintptr(unsafe.Pointer(&args)), 0) 229 if err != 0 { 230 return 0, err 231 } 232 return int(n), nil 233 } 234 235 func sendto(s int, p []byte, flags int, to unsafe.Pointer, addrlen _Socklen) error { 236 var base uintptr 237 if len(p) > 0 { 238 base = uintptr(unsafe.Pointer(&p[0])) 239 } 240 args := [6]uintptr{uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(to), uintptr(addrlen)} 241 _, _, err := Syscall(SYS_SOCKETCALL, netSendTo, uintptr(unsafe.Pointer(&args)), 0) 242 if err != 0 { 243 return err 244 } 245 return nil 246 } 247 248 func recvmsg(s int, msg *Msghdr, flags int) (int, error) { 249 args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags)} 250 n, _, err := Syscall(SYS_SOCKETCALL, netRecvMsg, uintptr(unsafe.Pointer(&args)), 0) 251 if err != 0 { 252 return 0, err 253 } 254 return int(n), nil 255 } 256 257 func sendmsg(s int, msg *Msghdr, flags int) (int, error) { 258 args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags)} 259 n, _, err := Syscall(SYS_SOCKETCALL, netSendMsg, uintptr(unsafe.Pointer(&args)), 0) 260 if err != 0 { 261 return 0, err 262 } 263 return int(n), nil 264 } 265 266 func Listen(s int, n int) error { 267 args := [2]uintptr{uintptr(s), uintptr(n)} 268 _, _, err := Syscall(SYS_SOCKETCALL, netListen, uintptr(unsafe.Pointer(&args)), 0) 269 if err != 0 { 270 return err 271 } 272 return nil 273 } 274 275 func Shutdown(s, how int) error { 276 args := [2]uintptr{uintptr(s), uintptr(how)} 277 _, _, err := Syscall(SYS_SOCKETCALL, netShutdown, uintptr(unsafe.Pointer(&args)), 0) 278 if err != 0 { 279 return err 280 } 281 return nil 282 } 283 284 //sys kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error) 285 286 func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error { 287 cmdlineLen := len(cmdline) 288 if cmdlineLen > 0 { 289 // Account for the additional NULL byte added by 290 // BytePtrFromString in kexecFileLoad. The kexec_file_load 291 // syscall expects a NULL-terminated string. 292 cmdlineLen++ 293 } 294 return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags) 295 }