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