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1 // Copyright 2016 The Go Authors. All rights reserved. |
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2 // Use of this source code is governed by a BSD-style |
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3 // license that can be found in the LICENSE file. |
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4 |
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5 // +build s390x,linux |
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6 |
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7 package unix |
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8 |
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9 import ( |
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10 "unsafe" |
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11 ) |
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12 |
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13 //sys Dup2(oldfd int, newfd int) (err error) |
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14 //sysnb EpollCreate(size int) (fd int, err error) |
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15 //sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) |
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16 //sys Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64 |
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17 //sys Fchown(fd int, uid int, gid int) (err error) |
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18 //sys Fstat(fd int, stat *Stat_t) (err error) |
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19 //sys Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_NEWFSTATAT |
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20 //sys Fstatfs(fd int, buf *Statfs_t) (err error) |
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21 //sys Ftruncate(fd int, length int64) (err error) |
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22 //sysnb Getegid() (egid int) |
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23 //sysnb Geteuid() (euid int) |
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24 //sysnb Getgid() (gid int) |
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25 //sysnb Getrlimit(resource int, rlim *Rlimit) (err error) |
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26 //sysnb Getuid() (uid int) |
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27 //sysnb InotifyInit() (fd int, err error) |
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28 //sys Lchown(path string, uid int, gid int) (err error) |
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29 //sys Lstat(path string, stat *Stat_t) (err error) |
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30 //sys Pause() (err error) |
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31 //sys Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64 |
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32 //sys Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64 |
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33 //sys Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK |
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34 //sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) |
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35 //sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) |
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36 //sys Setfsgid(gid int) (err error) |
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37 //sys Setfsuid(uid int) (err error) |
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38 //sysnb Setregid(rgid int, egid int) (err error) |
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39 //sysnb Setresgid(rgid int, egid int, sgid int) (err error) |
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40 //sysnb Setresuid(ruid int, euid int, suid int) (err error) |
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41 //sysnb Setrlimit(resource int, rlim *Rlimit) (err error) |
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42 //sysnb Setreuid(ruid int, euid int) (err error) |
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43 //sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error) |
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44 //sys Stat(path string, stat *Stat_t) (err error) |
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45 //sys Statfs(path string, buf *Statfs_t) (err error) |
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46 //sys SyncFileRange(fd int, off int64, n int64, flags int) (err error) |
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47 //sys Truncate(path string, length int64) (err error) |
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48 //sys Ustat(dev int, ubuf *Ustat_t) (err error) |
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49 //sysnb getgroups(n int, list *_Gid_t) (nn int, err error) |
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50 //sysnb setgroups(n int, list *_Gid_t) (err error) |
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51 |
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52 //sys futimesat(dirfd int, path string, times *[2]Timeval) (err error) |
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53 //sysnb Gettimeofday(tv *Timeval) (err error) |
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54 |
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55 func Time(t *Time_t) (tt Time_t, err error) { |
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56 var tv Timeval |
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57 err = Gettimeofday(&tv) |
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58 if err != nil { |
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59 return 0, err |
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60 } |
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61 if t != nil { |
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62 *t = Time_t(tv.Sec) |
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63 } |
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64 return Time_t(tv.Sec), nil |
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65 } |
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66 |
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67 //sys Utime(path string, buf *Utimbuf) (err error) |
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68 //sys utimes(path string, times *[2]Timeval) (err error) |
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69 |
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70 func setTimespec(sec, nsec int64) Timespec { |
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71 return Timespec{Sec: sec, Nsec: nsec} |
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72 } |
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73 |
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74 func setTimeval(sec, usec int64) Timeval { |
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75 return Timeval{Sec: sec, Usec: usec} |
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76 } |
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77 |
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78 //sysnb pipe2(p *[2]_C_int, flags int) (err error) |
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79 |
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80 func Pipe(p []int) (err error) { |
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81 if len(p) != 2 { |
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82 return EINVAL |
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83 } |
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84 var pp [2]_C_int |
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85 err = pipe2(&pp, 0) // pipe2 is the same as pipe when flags are set to 0. |
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86 p[0] = int(pp[0]) |
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87 p[1] = int(pp[1]) |
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88 return |
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89 } |
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90 |
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91 func Pipe2(p []int, flags int) (err error) { |
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92 if len(p) != 2 { |
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93 return EINVAL |
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94 } |
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95 var pp [2]_C_int |
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96 err = pipe2(&pp, flags) |
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97 p[0] = int(pp[0]) |
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98 p[1] = int(pp[1]) |
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99 return |
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100 } |
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101 |
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102 func Ioperm(from int, num int, on int) (err error) { |
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103 return ENOSYS |
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104 } |
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105 |
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106 func Iopl(level int) (err error) { |
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107 return ENOSYS |
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108 } |
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109 |
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110 func (r *PtraceRegs) PC() uint64 { return r.Psw.Addr } |
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111 |
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112 func (r *PtraceRegs) SetPC(pc uint64) { r.Psw.Addr = pc } |
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113 |
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114 func (iov *Iovec) SetLen(length int) { |
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115 iov.Len = uint64(length) |
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116 } |
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117 |
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118 func (msghdr *Msghdr) SetControllen(length int) { |
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119 msghdr.Controllen = uint64(length) |
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120 } |
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121 |
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122 func (cmsg *Cmsghdr) SetLen(length int) { |
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123 cmsg.Len = uint64(length) |
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124 } |
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125 |
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126 // Linux on s390x uses the old mmap interface, which requires arguments to be passed in a struct. |
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127 // mmap2 also requires arguments to be passed in a struct; it is currently not exposed in <asm/unistd.h>. |
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128 func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) { |
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129 mmap_args := [6]uintptr{addr, length, uintptr(prot), uintptr(flags), uintptr(fd), uintptr(offset)} |
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130 r0, _, e1 := Syscall(SYS_MMAP, uintptr(unsafe.Pointer(&mmap_args[0])), 0, 0) |
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131 xaddr = uintptr(r0) |
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132 if e1 != 0 { |
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133 err = errnoErr(e1) |
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134 } |
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135 return |
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136 } |
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137 |
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138 // On s390x Linux, all the socket calls go through an extra indirection. |
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139 // The arguments to the underlying system call (SYS_SOCKETCALL) are the |
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140 // number below and a pointer to an array of uintptr. |
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141 const ( |
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142 // see linux/net.h |
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143 netSocket = 1 |
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144 netBind = 2 |
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145 netConnect = 3 |
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146 netListen = 4 |
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147 netAccept = 5 |
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148 netGetSockName = 6 |
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149 netGetPeerName = 7 |
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150 netSocketPair = 8 |
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151 netSend = 9 |
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152 netRecv = 10 |
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153 netSendTo = 11 |
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154 netRecvFrom = 12 |
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155 netShutdown = 13 |
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156 netSetSockOpt = 14 |
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157 netGetSockOpt = 15 |
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158 netSendMsg = 16 |
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159 netRecvMsg = 17 |
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160 netAccept4 = 18 |
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161 netRecvMMsg = 19 |
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162 netSendMMsg = 20 |
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163 ) |
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164 |
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165 func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (int, error) { |
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166 args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))} |
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167 fd, _, err := Syscall(SYS_SOCKETCALL, netAccept, uintptr(unsafe.Pointer(&args)), 0) |
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168 if err != 0 { |
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169 return 0, err |
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170 } |
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171 return int(fd), nil |
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172 } |
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173 |
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174 func accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (int, error) { |
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175 args := [4]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags)} |
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176 fd, _, err := Syscall(SYS_SOCKETCALL, netAccept4, uintptr(unsafe.Pointer(&args)), 0) |
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177 if err != 0 { |
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178 return 0, err |
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179 } |
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180 return int(fd), nil |
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181 } |
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182 |
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183 func getsockname(s int, rsa *RawSockaddrAny, addrlen *_Socklen) error { |
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184 args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))} |
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185 _, _, err := RawSyscall(SYS_SOCKETCALL, netGetSockName, uintptr(unsafe.Pointer(&args)), 0) |
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186 if err != 0 { |
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187 return err |
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188 } |
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189 return nil |
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190 } |
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191 |
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192 func getpeername(s int, rsa *RawSockaddrAny, addrlen *_Socklen) error { |
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193 args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))} |
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194 _, _, err := RawSyscall(SYS_SOCKETCALL, netGetPeerName, uintptr(unsafe.Pointer(&args)), 0) |
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195 if err != 0 { |
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196 return err |
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197 } |
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198 return nil |
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199 } |
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200 |
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201 func socketpair(domain int, typ int, flags int, fd *[2]int32) error { |
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202 args := [4]uintptr{uintptr(domain), uintptr(typ), uintptr(flags), uintptr(unsafe.Pointer(fd))} |
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203 _, _, err := RawSyscall(SYS_SOCKETCALL, netSocketPair, uintptr(unsafe.Pointer(&args)), 0) |
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204 if err != 0 { |
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205 return err |
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206 } |
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207 return nil |
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208 } |
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209 |
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210 func bind(s int, addr unsafe.Pointer, addrlen _Socklen) error { |
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211 args := [3]uintptr{uintptr(s), uintptr(addr), uintptr(addrlen)} |
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212 _, _, err := Syscall(SYS_SOCKETCALL, netBind, uintptr(unsafe.Pointer(&args)), 0) |
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213 if err != 0 { |
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214 return err |
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215 } |
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216 return nil |
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217 } |
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218 |
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219 func connect(s int, addr unsafe.Pointer, addrlen _Socklen) error { |
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220 args := [3]uintptr{uintptr(s), uintptr(addr), uintptr(addrlen)} |
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221 _, _, err := Syscall(SYS_SOCKETCALL, netConnect, uintptr(unsafe.Pointer(&args)), 0) |
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222 if err != 0 { |
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223 return err |
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224 } |
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225 return nil |
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226 } |
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227 |
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228 func socket(domain int, typ int, proto int) (int, error) { |
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229 args := [3]uintptr{uintptr(domain), uintptr(typ), uintptr(proto)} |
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230 fd, _, err := RawSyscall(SYS_SOCKETCALL, netSocket, uintptr(unsafe.Pointer(&args)), 0) |
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231 if err != 0 { |
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232 return 0, err |
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233 } |
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234 return int(fd), nil |
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235 } |
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236 |
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237 func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) error { |
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238 args := [5]uintptr{uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen))} |
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239 _, _, err := Syscall(SYS_SOCKETCALL, netGetSockOpt, uintptr(unsafe.Pointer(&args)), 0) |
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240 if err != 0 { |
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241 return err |
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242 } |
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243 return nil |
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244 } |
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245 |
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246 func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) error { |
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247 args := [4]uintptr{uintptr(s), uintptr(level), uintptr(name), uintptr(val)} |
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248 _, _, err := Syscall(SYS_SOCKETCALL, netSetSockOpt, uintptr(unsafe.Pointer(&args)), 0) |
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249 if err != 0 { |
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250 return err |
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251 } |
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252 return nil |
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253 } |
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254 |
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255 func recvfrom(s int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (int, error) { |
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256 var base uintptr |
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257 if len(p) > 0 { |
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258 base = uintptr(unsafe.Pointer(&p[0])) |
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259 } |
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260 args := [6]uintptr{uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen))} |
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261 n, _, err := Syscall(SYS_SOCKETCALL, netRecvFrom, uintptr(unsafe.Pointer(&args)), 0) |
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262 if err != 0 { |
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263 return 0, err |
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264 } |
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265 return int(n), nil |
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266 } |
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267 |
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268 func sendto(s int, p []byte, flags int, to unsafe.Pointer, addrlen _Socklen) error { |
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269 var base uintptr |
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270 if len(p) > 0 { |
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271 base = uintptr(unsafe.Pointer(&p[0])) |
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272 } |
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273 args := [6]uintptr{uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(to), uintptr(addrlen)} |
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274 _, _, err := Syscall(SYS_SOCKETCALL, netSendTo, uintptr(unsafe.Pointer(&args)), 0) |
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275 if err != 0 { |
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276 return err |
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277 } |
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278 return nil |
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279 } |
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280 |
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281 func recvmsg(s int, msg *Msghdr, flags int) (int, error) { |
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282 args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags)} |
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283 n, _, err := Syscall(SYS_SOCKETCALL, netRecvMsg, uintptr(unsafe.Pointer(&args)), 0) |
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284 if err != 0 { |
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285 return 0, err |
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286 } |
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287 return int(n), nil |
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288 } |
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289 |
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290 func sendmsg(s int, msg *Msghdr, flags int) (int, error) { |
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291 args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags)} |
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292 n, _, err := Syscall(SYS_SOCKETCALL, netSendMsg, uintptr(unsafe.Pointer(&args)), 0) |
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293 if err != 0 { |
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294 return 0, err |
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295 } |
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296 return int(n), nil |
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297 } |
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298 |
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299 func Listen(s int, n int) error { |
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300 args := [2]uintptr{uintptr(s), uintptr(n)} |
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301 _, _, err := Syscall(SYS_SOCKETCALL, netListen, uintptr(unsafe.Pointer(&args)), 0) |
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302 if err != 0 { |
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303 return err |
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304 } |
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305 return nil |
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306 } |
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307 |
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308 func Shutdown(s, how int) error { |
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309 args := [2]uintptr{uintptr(s), uintptr(how)} |
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310 _, _, err := Syscall(SYS_SOCKETCALL, netShutdown, uintptr(unsafe.Pointer(&args)), 0) |
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311 if err != 0 { |
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312 return err |
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313 } |
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314 return nil |
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315 } |
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316 |
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317 //sys poll(fds *PollFd, nfds int, timeout int) (n int, err error) |
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318 |
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319 func Poll(fds []PollFd, timeout int) (n int, err error) { |
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320 if len(fds) == 0 { |
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321 return poll(nil, 0, timeout) |
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322 } |
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323 return poll(&fds[0], len(fds), timeout) |
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324 } |