1// Copyright 2021 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 linux && ppc 6// +build linux,ppc 7 8package unix 9 10import ( 11 "syscall" 12 "unsafe" 13) 14 15//sys dup2(oldfd int, newfd int) (err error) 16//sysnb EpollCreate(size int) (fd int, err error) 17//sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) 18//sys Fchown(fd int, uid int, gid int) (err error) 19//sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64 20//sys Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64 21//sys Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64 22//sysnb Getegid() (egid int) 23//sysnb Geteuid() (euid int) 24//sysnb Getgid() (gid int) 25//sysnb Getuid() (uid int) 26//sysnb InotifyInit() (fd int, err error) 27//sys Ioperm(from int, num int, on int) (err error) 28//sys Iopl(level int) (err error) 29//sys Lchown(path string, uid int, gid int) (err error) 30//sys Listen(s int, n int) (err error) 31//sys Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64 32//sys Pause() (err error) 33//sys Pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64 34//sys Pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64 35//sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) 36//sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT 37//sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64 38//sys setfsgid(gid int) (prev int, err error) 39//sys setfsuid(uid int) (prev int, err error) 40//sysnb Setregid(rgid int, egid int) (err error) 41//sysnb Setresgid(rgid int, egid int, sgid int) (err error) 42//sysnb Setresuid(ruid int, euid int, suid int) (err error) 43//sysnb Setreuid(ruid int, euid int) (err error) 44//sys Shutdown(fd int, how int) (err error) 45//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) 46//sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64 47//sys Truncate(path string, length int64) (err error) = SYS_TRUNCATE64 48//sys Ustat(dev int, ubuf *Ustat_t) (err error) 49//sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) 50//sys accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error) 51//sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) 52//sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) 53//sysnb getgroups(n int, list *_Gid_t) (nn int, err error) 54//sysnb setgroups(n int, list *_Gid_t) (err error) 55//sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) 56//sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) 57//sysnb socket(domain int, typ int, proto int) (fd int, err error) 58//sysnb socketpair(domain int, typ int, proto int, fd *[2]int32) (err error) 59//sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) 60//sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) 61//sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) 62//sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) 63//sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error) 64//sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error) 65 66//sys futimesat(dirfd int, path string, times *[2]Timeval) (err error) 67//sysnb Gettimeofday(tv *Timeval) (err error) 68//sysnb Time(t *Time_t) (tt Time_t, err error) 69//sys Utime(path string, buf *Utimbuf) (err error) 70//sys utimes(path string, times *[2]Timeval) (err error) 71 72func Fadvise(fd int, offset int64, length int64, advice int) (err error) { 73 _, _, e1 := Syscall6(SYS_FADVISE64_64, uintptr(fd), uintptr(advice), uintptr(offset>>32), uintptr(offset), uintptr(length>>32), uintptr(length)) 74 if e1 != 0 { 75 err = errnoErr(e1) 76 } 77 return 78} 79 80func seek(fd int, offset int64, whence int) (int64, syscall.Errno) { 81 var newoffset int64 82 offsetLow := uint32(offset & 0xffffffff) 83 offsetHigh := uint32((offset >> 32) & 0xffffffff) 84 _, _, err := Syscall6(SYS__LLSEEK, uintptr(fd), uintptr(offsetHigh), uintptr(offsetLow), uintptr(unsafe.Pointer(&newoffset)), uintptr(whence), 0) 85 return newoffset, err 86} 87 88func Seek(fd int, offset int64, whence int) (newoffset int64, err error) { 89 newoffset, errno := seek(fd, offset, whence) 90 if errno != 0 { 91 return 0, errno 92 } 93 return newoffset, nil 94} 95 96func Fstatfs(fd int, buf *Statfs_t) (err error) { 97 _, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf))) 98 if e != 0 { 99 err = e 100 } 101 return 102} 103 104func Statfs(path string, buf *Statfs_t) (err error) { 105 pathp, err := BytePtrFromString(path) 106 if err != nil { 107 return err 108 } 109 _, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf))) 110 if e != 0 { 111 err = e 112 } 113 return 114} 115 116//sys mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error) 117 118func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) { 119 page := uintptr(offset / 4096) 120 if offset != int64(page)*4096 { 121 return 0, EINVAL 122 } 123 return mmap2(addr, length, prot, flags, fd, page) 124} 125 126func setTimespec(sec, nsec int64) Timespec { 127 return Timespec{Sec: int32(sec), Nsec: int32(nsec)} 128} 129 130func setTimeval(sec, usec int64) Timeval { 131 return Timeval{Sec: int32(sec), Usec: int32(usec)} 132} 133 134type rlimit32 struct { 135 Cur uint32 136 Max uint32 137} 138 139//sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_UGETRLIMIT 140 141const rlimInf32 = ^uint32(0) 142const rlimInf64 = ^uint64(0) 143 144func Getrlimit(resource int, rlim *Rlimit) (err error) { 145 err = Prlimit(0, resource, nil, rlim) 146 if err != ENOSYS { 147 return err 148 } 149 150 rl := rlimit32{} 151 err = getrlimit(resource, &rl) 152 if err != nil { 153 return 154 } 155 156 if rl.Cur == rlimInf32 { 157 rlim.Cur = rlimInf64 158 } else { 159 rlim.Cur = uint64(rl.Cur) 160 } 161 162 if rl.Max == rlimInf32 { 163 rlim.Max = rlimInf64 164 } else { 165 rlim.Max = uint64(rl.Max) 166 } 167 return 168} 169 170//sysnb setrlimit(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT 171 172func Setrlimit(resource int, rlim *Rlimit) (err error) { 173 err = Prlimit(0, resource, rlim, nil) 174 if err != ENOSYS { 175 return err 176 } 177 178 rl := rlimit32{} 179 if rlim.Cur == rlimInf64 { 180 rl.Cur = rlimInf32 181 } else if rlim.Cur < uint64(rlimInf32) { 182 rl.Cur = uint32(rlim.Cur) 183 } else { 184 return EINVAL 185 } 186 if rlim.Max == rlimInf64 { 187 rl.Max = rlimInf32 188 } else if rlim.Max < uint64(rlimInf32) { 189 rl.Max = uint32(rlim.Max) 190 } else { 191 return EINVAL 192 } 193 194 return setrlimit(resource, &rl) 195} 196 197func (r *PtraceRegs) PC() uint32 { return r.Nip } 198 199func (r *PtraceRegs) SetPC(pc uint32) { r.Nip = pc } 200 201func (iov *Iovec) SetLen(length int) { 202 iov.Len = uint32(length) 203} 204 205func (msghdr *Msghdr) SetControllen(length int) { 206 msghdr.Controllen = uint32(length) 207} 208 209func (msghdr *Msghdr) SetIovlen(length int) { 210 msghdr.Iovlen = uint32(length) 211} 212 213func (cmsg *Cmsghdr) SetLen(length int) { 214 cmsg.Len = uint32(length) 215} 216 217func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) { 218 rsa.Service_name_len = uint32(length) 219} 220 221//sysnb pipe(p *[2]_C_int) (err error) 222 223func Pipe(p []int) (err error) { 224 if len(p) != 2 { 225 return EINVAL 226 } 227 var pp [2]_C_int 228 err = pipe(&pp) 229 p[0] = int(pp[0]) 230 p[1] = int(pp[1]) 231 return 232} 233 234//sysnb pipe2(p *[2]_C_int, flags int) (err error) 235 236func Pipe2(p []int, flags int) (err error) { 237 if len(p) != 2 { 238 return EINVAL 239 } 240 var pp [2]_C_int 241 err = pipe2(&pp, flags) 242 p[0] = int(pp[0]) 243 p[1] = int(pp[1]) 244 return 245} 246 247//sys poll(fds *PollFd, nfds int, timeout int) (n int, err error) 248 249func Poll(fds []PollFd, timeout int) (n int, err error) { 250 if len(fds) == 0 { 251 return poll(nil, 0, timeout) 252 } 253 return poll(&fds[0], len(fds), timeout) 254} 255 256//sys syncFileRange2(fd int, flags int, off int64, n int64) (err error) = SYS_SYNC_FILE_RANGE2 257 258func SyncFileRange(fd int, off int64, n int64, flags int) error { 259 // The sync_file_range and sync_file_range2 syscalls differ only in the 260 // order of their arguments. 261 return syncFileRange2(fd, flags, off, n) 262} 263 264//sys kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error) 265 266func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error { 267 cmdlineLen := len(cmdline) 268 if cmdlineLen > 0 { 269 // Account for the additional NULL byte added by 270 // BytePtrFromString in kexecFileLoad. The kexec_file_load 271 // syscall expects a NULL-terminated string. 272 cmdlineLen++ 273 } 274 return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags) 275} 276