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