usb-ks

USB Killswitch
git clone git://git.laack.co/usb-ks.git
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syscall_linux_arm.go (7974B)

      1 // Copyright 2009 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 arm && linux
      6 // +build arm,linux
      7 
      8 package unix
      9 
     10 import (
     11 	"unsafe"
     12 )
     13 
     14 func setTimespec(sec, nsec int64) Timespec {
     15 	return Timespec{Sec: int32(sec), Nsec: int32(nsec)}
     16 }
     17 
     18 func setTimeval(sec, usec int64) Timeval {
     19 	return Timeval{Sec: int32(sec), Usec: int32(usec)}
     20 }
     21 
     22 func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
     23 	newoffset, errno := seek(fd, offset, whence)
     24 	if errno != 0 {
     25 		return 0, errno
     26 	}
     27 	return newoffset, nil
     28 }
     29 
     30 //sys	accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
     31 //sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
     32 //sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
     33 //sysnb	getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32
     34 //sysnb	setgroups(n int, list *_Gid_t) (err error) = SYS_SETGROUPS32
     35 //sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
     36 //sys	setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
     37 //sysnb	socket(domain int, typ int, proto int) (fd int, err error)
     38 //sysnb	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
     39 //sysnb	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
     40 //sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
     41 //sys	sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
     42 //sysnb	socketpair(domain int, typ int, flags int, fd *[2]int32) (err error)
     43 //sys	recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
     44 //sys	sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
     45 
     46 // 64-bit file system and 32-bit uid calls
     47 // (16-bit uid calls are not always supported in newer kernels)
     48 //sys	EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
     49 //sys	Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32
     50 //sys	Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
     51 //sys	Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64
     52 //sysnb	Getegid() (egid int) = SYS_GETEGID32
     53 //sysnb	Geteuid() (euid int) = SYS_GETEUID32
     54 //sysnb	Getgid() (gid int) = SYS_GETGID32
     55 //sysnb	Getuid() (uid int) = SYS_GETUID32
     56 //sys	Lchown(path string, uid int, gid int) (err error) = SYS_LCHOWN32
     57 //sys	Listen(s int, n int) (err error)
     58 //sys	Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64
     59 //sys	Pause() (err error)
     60 //sys	Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
     61 //sys	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64
     62 //sys	Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT
     63 //sys	setfsgid(gid int) (prev int, err error) = SYS_SETFSGID32
     64 //sys	setfsuid(uid int) (prev int, err error) = SYS_SETFSUID32
     65 //sysnb	Setregid(rgid int, egid int) (err error) = SYS_SETREGID32
     66 //sysnb	Setresgid(rgid int, egid int, sgid int) (err error) = SYS_SETRESGID32
     67 //sysnb	Setresuid(ruid int, euid int, suid int) (err error) = SYS_SETRESUID32
     68 //sysnb	Setreuid(ruid int, euid int) (err error) = SYS_SETREUID32
     69 //sys	Shutdown(fd int, how int) (err error)
     70 //sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
     71 //sys	Stat(path string, stat *Stat_t) (err error) = SYS_STAT64
     72 //sys	Ustat(dev int, ubuf *Ustat_t) (err error)
     73 
     74 //sys	futimesat(dirfd int, path string, times *[2]Timeval) (err error)
     75 //sysnb	Gettimeofday(tv *Timeval) (err error)
     76 
     77 func Time(t *Time_t) (Time_t, error) {
     78 	var tv Timeval
     79 	err := Gettimeofday(&tv)
     80 	if err != nil {
     81 		return 0, err
     82 	}
     83 	if t != nil {
     84 		*t = Time_t(tv.Sec)
     85 	}
     86 	return Time_t(tv.Sec), nil
     87 }
     88 
     89 func Utime(path string, buf *Utimbuf) error {
     90 	tv := []Timeval{
     91 		{Sec: buf.Actime},
     92 		{Sec: buf.Modtime},
     93 	}
     94 	return Utimes(path, tv)
     95 }
     96 
     97 //sys	utimes(path string, times *[2]Timeval) (err error)
     98 
     99 //sys	pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
    100 //sys	pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
    101 //sys	Truncate(path string, length int64) (err error) = SYS_TRUNCATE64
    102 //sys	Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64
    103 
    104 func Fadvise(fd int, offset int64, length int64, advice int) (err error) {
    105 	_, _, e1 := Syscall6(SYS_ARM_FADVISE64_64, uintptr(fd), uintptr(advice), uintptr(offset), uintptr(offset>>32), uintptr(length), uintptr(length>>32))
    106 	if e1 != 0 {
    107 		err = errnoErr(e1)
    108 	}
    109 	return
    110 }
    111 
    112 //sys	mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error)
    113 
    114 func Fstatfs(fd int, buf *Statfs_t) (err error) {
    115 	_, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
    116 	if e != 0 {
    117 		err = e
    118 	}
    119 	return
    120 }
    121 
    122 func Statfs(path string, buf *Statfs_t) (err error) {
    123 	pathp, err := BytePtrFromString(path)
    124 	if err != nil {
    125 		return err
    126 	}
    127 	_, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
    128 	if e != 0 {
    129 		err = e
    130 	}
    131 	return
    132 }
    133 
    134 func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
    135 	page := uintptr(offset / 4096)
    136 	if offset != int64(page)*4096 {
    137 		return 0, EINVAL
    138 	}
    139 	return mmap2(addr, length, prot, flags, fd, page)
    140 }
    141 
    142 type rlimit32 struct {
    143 	Cur uint32
    144 	Max uint32
    145 }
    146 
    147 //sysnb	getrlimit(resource int, rlim *rlimit32) (err error) = SYS_UGETRLIMIT
    148 
    149 const rlimInf32 = ^uint32(0)
    150 const rlimInf64 = ^uint64(0)
    151 
    152 func Getrlimit(resource int, rlim *Rlimit) (err error) {
    153 	err = Prlimit(0, resource, nil, rlim)
    154 	if err != ENOSYS {
    155 		return err
    156 	}
    157 
    158 	rl := rlimit32{}
    159 	err = getrlimit(resource, &rl)
    160 	if err != nil {
    161 		return
    162 	}
    163 
    164 	if rl.Cur == rlimInf32 {
    165 		rlim.Cur = rlimInf64
    166 	} else {
    167 		rlim.Cur = uint64(rl.Cur)
    168 	}
    169 
    170 	if rl.Max == rlimInf32 {
    171 		rlim.Max = rlimInf64
    172 	} else {
    173 		rlim.Max = uint64(rl.Max)
    174 	}
    175 	return
    176 }
    177 
    178 //sysnb	setrlimit(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT
    179 
    180 func Setrlimit(resource int, rlim *Rlimit) (err error) {
    181 	err = Prlimit(0, resource, rlim, nil)
    182 	if err != ENOSYS {
    183 		return err
    184 	}
    185 
    186 	rl := rlimit32{}
    187 	if rlim.Cur == rlimInf64 {
    188 		rl.Cur = rlimInf32
    189 	} else if rlim.Cur < uint64(rlimInf32) {
    190 		rl.Cur = uint32(rlim.Cur)
    191 	} else {
    192 		return EINVAL
    193 	}
    194 	if rlim.Max == rlimInf64 {
    195 		rl.Max = rlimInf32
    196 	} else if rlim.Max < uint64(rlimInf32) {
    197 		rl.Max = uint32(rlim.Max)
    198 	} else {
    199 		return EINVAL
    200 	}
    201 
    202 	return setrlimit(resource, &rl)
    203 }
    204 
    205 func (r *PtraceRegs) PC() uint64 { return uint64(r.Uregs[15]) }
    206 
    207 func (r *PtraceRegs) SetPC(pc uint64) { r.Uregs[15] = uint32(pc) }
    208 
    209 func (iov *Iovec) SetLen(length int) {
    210 	iov.Len = uint32(length)
    211 }
    212 
    213 func (msghdr *Msghdr) SetControllen(length int) {
    214 	msghdr.Controllen = uint32(length)
    215 }
    216 
    217 func (msghdr *Msghdr) SetIovlen(length int) {
    218 	msghdr.Iovlen = uint32(length)
    219 }
    220 
    221 func (cmsg *Cmsghdr) SetLen(length int) {
    222 	cmsg.Len = uint32(length)
    223 }
    224 
    225 func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
    226 	rsa.Service_name_len = uint32(length)
    227 }
    228 
    229 //sys	armSyncFileRange(fd int, flags int, off int64, n int64) (err error) = SYS_ARM_SYNC_FILE_RANGE
    230 
    231 func SyncFileRange(fd int, off int64, n int64, flags int) error {
    232 	// The sync_file_range and arm_sync_file_range syscalls differ only in the
    233 	// order of their arguments.
    234 	return armSyncFileRange(fd, flags, off, n)
    235 }
    236 
    237 //sys	kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error)
    238 
    239 func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error {
    240 	cmdlineLen := len(cmdline)
    241 	if cmdlineLen > 0 {
    242 		// Account for the additional NULL byte added by
    243 		// BytePtrFromString in kexecFileLoad. The kexec_file_load
    244 		// syscall expects a NULL-terminated string.
    245 		cmdlineLen++
    246 	}
    247 	return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags)
    248 }