khenaidoo | 5fc5cea | 2021-08-11 17:39:16 -0400 | [diff] [blame] | 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 |
Joey Armstrong | ba3d9d1 | 2024-01-15 14:22:11 -0500 | [diff] [blame] | 6 | // +build linux,ppc |
khenaidoo | 5fc5cea | 2021-08-11 17:39:16 -0400 | [diff] [blame] | 7 | |
| 8 | package unix |
| 9 | |
| 10 | import ( |
| 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 | |
| 72 | func 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 | |
| 80 | func 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 | |
| 88 | func 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 | |
| 96 | func 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 | |
| 104 | func 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 | |
| 118 | func 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 | |
| 126 | func setTimespec(sec, nsec int64) Timespec { |
| 127 | return Timespec{Sec: int32(sec), Nsec: int32(nsec)} |
| 128 | } |
| 129 | |
| 130 | func setTimeval(sec, usec int64) Timeval { |
| 131 | return Timeval{Sec: int32(sec), Usec: int32(usec)} |
| 132 | } |
| 133 | |
| 134 | type rlimit32 struct { |
| 135 | Cur uint32 |
| 136 | Max uint32 |
| 137 | } |
| 138 | |
| 139 | //sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_UGETRLIMIT |
| 140 | |
| 141 | const rlimInf32 = ^uint32(0) |
| 142 | const rlimInf64 = ^uint64(0) |
| 143 | |
| 144 | func 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 | |
| 172 | func 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 | |
| 197 | func (r *PtraceRegs) PC() uint32 { return r.Nip } |
| 198 | |
| 199 | func (r *PtraceRegs) SetPC(pc uint32) { r.Nip = pc } |
| 200 | |
| 201 | func (iov *Iovec) SetLen(length int) { |
| 202 | iov.Len = uint32(length) |
| 203 | } |
| 204 | |
| 205 | func (msghdr *Msghdr) SetControllen(length int) { |
| 206 | msghdr.Controllen = uint32(length) |
| 207 | } |
| 208 | |
| 209 | func (msghdr *Msghdr) SetIovlen(length int) { |
| 210 | msghdr.Iovlen = uint32(length) |
| 211 | } |
| 212 | |
| 213 | func (cmsg *Cmsghdr) SetLen(length int) { |
| 214 | cmsg.Len = uint32(length) |
| 215 | } |
| 216 | |
| 217 | //sysnb pipe(p *[2]_C_int) (err error) |
| 218 | |
| 219 | func Pipe(p []int) (err error) { |
| 220 | if len(p) != 2 { |
| 221 | return EINVAL |
| 222 | } |
| 223 | var pp [2]_C_int |
| 224 | err = pipe(&pp) |
| 225 | p[0] = int(pp[0]) |
| 226 | p[1] = int(pp[1]) |
| 227 | return |
| 228 | } |
| 229 | |
| 230 | //sysnb pipe2(p *[2]_C_int, flags int) (err error) |
| 231 | |
| 232 | func Pipe2(p []int, flags int) (err error) { |
| 233 | if len(p) != 2 { |
| 234 | return EINVAL |
| 235 | } |
| 236 | var pp [2]_C_int |
| 237 | err = pipe2(&pp, flags) |
| 238 | p[0] = int(pp[0]) |
| 239 | p[1] = int(pp[1]) |
| 240 | return |
| 241 | } |
| 242 | |
| 243 | //sys poll(fds *PollFd, nfds int, timeout int) (n int, err error) |
| 244 | |
| 245 | func Poll(fds []PollFd, timeout int) (n int, err error) { |
| 246 | if len(fds) == 0 { |
| 247 | return poll(nil, 0, timeout) |
| 248 | } |
| 249 | return poll(&fds[0], len(fds), timeout) |
| 250 | } |
| 251 | |
| 252 | //sys syncFileRange2(fd int, flags int, off int64, n int64) (err error) = SYS_SYNC_FILE_RANGE2 |
| 253 | |
| 254 | func SyncFileRange(fd int, off int64, n int64, flags int) error { |
| 255 | // The sync_file_range and sync_file_range2 syscalls differ only in the |
| 256 | // order of their arguments. |
| 257 | return syncFileRange2(fd, flags, off, n) |
| 258 | } |
| 259 | |
| 260 | //sys kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error) |
| 261 | |
| 262 | func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error { |
| 263 | cmdlineLen := len(cmdline) |
| 264 | if cmdlineLen > 0 { |
| 265 | // Account for the additional NULL byte added by |
| 266 | // BytePtrFromString in kexecFileLoad. The kexec_file_load |
| 267 | // syscall expects a NULL-terminated string. |
| 268 | cmdlineLen++ |
| 269 | } |
| 270 | return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags) |
| 271 | } |