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//sys Shutdown(fd int, how int) (err error)
38//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
39//sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64
40//sys Truncate(path string, length int64) (err error) = SYS_TRUNCATE64
41//sys Ustat(dev int, ubuf *Ustat_t) (err error)
42//sys accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
43//sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
44//sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
45//sysnb getgroups(n int, list *_Gid_t) (nn int, err error)
46//sysnb setgroups(n int, list *_Gid_t) (err error)
47//sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
48//sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
49//sysnb socket(domain int, typ int, proto int) (fd int, err error)
50//sysnb socketpair(domain int, typ int, proto int, fd *[2]int32) (err error)
51//sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
52//sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
53//sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
54//sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
55//sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
56//sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
57
58//sys futimesat(dirfd int, path string, times *[2]Timeval) (err error)
59//sysnb Gettimeofday(tv *Timeval) (err error)
60//sysnb Time(t *Time_t) (tt Time_t, err error)
61//sys Utime(path string, buf *Utimbuf) (err error)
62//sys utimes(path string, times *[2]Timeval) (err error)
63
64func Fadvise(fd int, offset int64, length int64, advice int) (err error) {
65 _, _, e1 := Syscall6(SYS_FADVISE64_64, uintptr(fd), uintptr(advice), uintptr(offset>>32), uintptr(offset), uintptr(length>>32), uintptr(length))
66 if e1 != 0 {
67 err = errnoErr(e1)
68 }
69 return
70}
71
72func seek(fd int, offset int64, whence int) (int64, syscall.Errno) {
73 var newoffset int64
74 offsetLow := uint32(offset & 0xffffffff)
75 offsetHigh := uint32((offset >> 32) & 0xffffffff)
76 _, _, err := Syscall6(SYS__LLSEEK, uintptr(fd), uintptr(offsetHigh), uintptr(offsetLow), uintptr(unsafe.Pointer(&newoffset)), uintptr(whence), 0)
77 return newoffset, err
78}
79
80func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
81 newoffset, errno := seek(fd, offset, whence)
82 if errno != 0 {
83 return 0, errno
84 }
85 return newoffset, nil
86}
87
88func Fstatfs(fd int, buf *Statfs_t) (err error) {
89 _, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
90 if e != 0 {
91 err = e
92 }
93 return
94}
95
96func Statfs(path string, buf *Statfs_t) (err error) {
97 pathp, err := BytePtrFromString(path)
98 if err != nil {
99 return err
100 }
101 _, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
102 if e != 0 {
103 err = e
104 }
105 return
106}
107
108//sys mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error)
109
110func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
111 page := uintptr(offset / 4096)
112 if offset != int64(page)*4096 {
113 return 0, EINVAL
114 }
115 return mmap2(addr, length, prot, flags, fd, page)
116}
117
118func setTimespec(sec, nsec int64) Timespec {
119 return Timespec{Sec: int32(sec), Nsec: int32(nsec)}
120}
121
122func setTimeval(sec, usec int64) Timeval {
123 return Timeval{Sec: int32(sec), Usec: int32(usec)}
124}
125
126type rlimit32 struct {
127 Cur uint32
128 Max uint32
129}
130
131//sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_UGETRLIMIT
132
133const rlimInf32 = ^uint32(0)
134const rlimInf64 = ^uint64(0)
135
136func Getrlimit(resource int, rlim *Rlimit) (err error) {
137 err = Prlimit(0, resource, nil, rlim)
138 if err != ENOSYS {
139 return err
140 }
141
142 rl := rlimit32{}
143 err = getrlimit(resource, &rl)
144 if err != nil {
145 return
146 }
147
148 if rl.Cur == rlimInf32 {
149 rlim.Cur = rlimInf64
150 } else {
151 rlim.Cur = uint64(rl.Cur)
152 }
153
154 if rl.Max == rlimInf32 {
155 rlim.Max = rlimInf64
156 } else {
157 rlim.Max = uint64(rl.Max)
158 }
159 return
160}
161
162func (r *PtraceRegs) PC() uint32 { return r.Nip }
163
164func (r *PtraceRegs) SetPC(pc uint32) { r.Nip = pc }
165
166func (iov *Iovec) SetLen(length int) {
167 iov.Len = uint32(length)
168}
169
170func (msghdr *Msghdr) SetControllen(length int) {
171 msghdr.Controllen = uint32(length)
172}
173
174func (msghdr *Msghdr) SetIovlen(length int) {
175 msghdr.Iovlen = uint32(length)
176}
177
178func (cmsg *Cmsghdr) SetLen(length int) {
179 cmsg.Len = uint32(length)
180}
181
182func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
183 rsa.Service_name_len = uint32(length)
184}
185
186//sys syncFileRange2(fd int, flags int, off int64, n int64) (err error) = SYS_SYNC_FILE_RANGE2
187
188func SyncFileRange(fd int, off int64, n int64, flags int) error {
189 // The sync_file_range and sync_file_range2 syscalls differ only in the
190 // order of their arguments.
191 return syncFileRange2(fd, flags, off, n)
192}
193
194//sys kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error)
195
196func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error {
197 cmdlineLen := len(cmdline)
198 if cmdlineLen > 0 {
199 // Account for the additional NULL byte added by
200 // BytePtrFromString in kexecFileLoad. The kexec_file_load
201 // syscall expects a NULL-terminated string.
202 cmdlineLen++
203 }
204 return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags)
205}