package syscall
import (
- errorspkg "errors"
+ "internal/abi"
"unsafe"
)
-const ImplementsGetwd = true
-
-func Getwd() (string, error) {
- buf := make([]byte, 2048)
- attrs, err := getAttrList(".", attrList{CommonAttr: attrCmnFullpath}, buf, 0)
- if err == nil && len(attrs) == 1 && len(attrs[0]) >= 2 {
- wd := string(attrs[0])
- // Sanity check that it's an absolute path and ends
- // in a null byte, which we then strip.
- if wd[0] == '/' && wd[len(wd)-1] == 0 {
- return wd[:len(wd)-1], nil
- }
- }
- // If pkg/os/getwd.go gets ENOTSUP, it will fall back to the
- // slow algorithm.
- return "", ENOTSUP
-}
+func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
+func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
+func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
+func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
+
+var dupTrampoline = abi.FuncPCABI0(libc_dup2_trampoline)
type SockaddrDatalink struct {
Len uint8
func PtraceAttach(pid int) (err error) { return ptrace(PT_ATTACH, pid, 0, 0) }
func PtraceDetach(pid int) (err error) { return ptrace(PT_DETACH, pid, 0, 0) }
-const (
- attrBitMapCount = 5
- attrCmnModtime = 0x00000400
- attrCmnAcctime = 0x00001000
- attrCmnFullpath = 0x08000000
-)
-
-type attrList struct {
- bitmapCount uint16
- _ uint16
- CommonAttr uint32
- VolAttr uint32
- DirAttr uint32
- FileAttr uint32
- Forkattr uint32
-}
-
-func getAttrList(path string, attrList attrList, attrBuf []byte, options uint) (attrs [][]byte, err error) {
- if len(attrBuf) < 4 {
- return nil, errorspkg.New("attrBuf too small")
- }
- attrList.bitmapCount = attrBitMapCount
-
- var _p0 *byte
- _p0, err = BytePtrFromString(path)
- if err != nil {
- return nil, err
- }
-
- _, _, e1 := syscall6(
- funcPC(libc_getattrlist_trampoline),
- uintptr(unsafe.Pointer(_p0)),
- uintptr(unsafe.Pointer(&attrList)),
- uintptr(unsafe.Pointer(&attrBuf[0])),
- uintptr(len(attrBuf)),
- uintptr(options),
- 0,
- )
- if e1 != 0 {
- return nil, e1
- }
- size := *(*uint32)(unsafe.Pointer(&attrBuf[0]))
-
- // dat is the section of attrBuf that contains valid data,
- // without the 4 byte length header. All attribute offsets
- // are relative to dat.
- dat := attrBuf
- if int(size) < len(attrBuf) {
- dat = dat[:size]
- }
- dat = dat[4:] // remove length prefix
-
- for i := uint32(0); int(i) < len(dat); {
- header := dat[i:]
- if len(header) < 8 {
- return attrs, errorspkg.New("truncated attribute header")
- }
- datOff := *(*int32)(unsafe.Pointer(&header[0]))
- attrLen := *(*uint32)(unsafe.Pointer(&header[4]))
- if datOff < 0 || uint32(datOff)+attrLen > uint32(len(dat)) {
- return attrs, errorspkg.New("truncated results; attrBuf too small")
- }
- end := uint32(datOff) + attrLen
- attrs = append(attrs, dat[datOff:end])
- i = end
- if r := i % 4; r != 0 {
- i += (4 - r)
- }
- }
- return
-}
-
-func libc_getattrlist_trampoline()
-
-//go:linkname libc_getattrlist libc_getattrlist
-//go:cgo_import_dynamic libc_getattrlist getattrlist "/usr/lib/libSystem.B.dylib"
-
//sysnb pipe(p *[2]int32) (err error)
func Pipe(p []int) (err error) {
}
var q [2]int32
err = pipe(&q)
- p[0] = int(q[0])
- p[1] = int(q[1])
+ if err == nil {
+ p[0] = int(q[0])
+ p[1] = int(q[1])
+ }
return
}
_p0 = unsafe.Pointer(&buf[0])
bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf))
}
- r0, _, e1 := syscall(funcPC(libc_getfsstat_trampoline), uintptr(_p0), bufsize, uintptr(flags))
+ r0, _, e1 := syscall(abi.FuncPCABI0(libc_getfsstat_trampoline), uintptr(_p0), bufsize, uintptr(flags))
n = int(r0)
if e1 != 0 {
err = e1
func libc_getfsstat_trampoline()
-//go:linkname libc_getfsstat libc_getfsstat
//go:cgo_import_dynamic libc_getfsstat getfsstat "/usr/lib/libSystem.B.dylib"
-func setattrlistTimes(path string, times []Timespec) error {
- _p0, err := BytePtrFromString(path)
- if err != nil {
- return err
- }
-
- var attrList attrList
- attrList.bitmapCount = attrBitMapCount
- attrList.CommonAttr = attrCmnModtime | attrCmnAcctime
-
- // order is mtime, atime: the opposite of Chtimes
- attributes := [2]Timespec{times[1], times[0]}
- const options = 0
- _, _, e1 := syscall6(
- funcPC(libc_setattrlist_trampoline),
- uintptr(unsafe.Pointer(_p0)),
- uintptr(unsafe.Pointer(&attrList)),
- uintptr(unsafe.Pointer(&attributes)),
- uintptr(unsafe.Sizeof(attributes)),
- uintptr(options),
- 0,
- )
- if e1 != 0 {
- return e1
- }
- return nil
-}
-
-func libc_setattrlist_trampoline()
-
-//go:linkname libc_setattrlist libc_setattrlist
-//go:cgo_import_dynamic libc_setattrlist setattrlist "/usr/lib/libSystem.B.dylib"
-
-func utimensat(dirfd int, path string, times *[2]Timespec, flag int) error {
- // Darwin doesn't support SYS_UTIMENSAT
- return ENOSYS
-}
+//sys utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error)
/*
* Wrapped
//sys Mlock(b []byte) (err error)
//sys Mlockall(flags int) (err error)
//sys Mprotect(b []byte, prot int) (err error)
+//sys msync(b []byte, flags int) (err error)
//sys Munlock(b []byte) (err error)
//sys Munlockall() (err error)
//sys Open(path string, mode int, perm uint32) (fd int, err error)
//sys Pathconf(path string, name int) (val int, err error)
-//sys Pread(fd int, p []byte, offset int64) (n int, err error)
-//sys Pwrite(fd int, p []byte, offset int64) (n int, err error)
+//sys pread(fd int, p []byte, offset int64) (n int, err error)
+//sys pwrite(fd int, p []byte, offset int64) (n int, err error)
//sys read(fd int, p []byte) (n int, err error)
//sys readdir_r(dir uintptr, entry *Dirent, result **Dirent) (res Errno)
//sys Readlink(path string, buf []byte) (n int, err error)
//sys Setprivexec(flag int) (err error)
//sysnb Setregid(rgid int, egid int) (err error)
//sysnb Setreuid(ruid int, euid int) (err error)
-//sysnb Setrlimit(which int, lim *Rlimit) (err error)
+//sysnb setrlimit(which int, lim *Rlimit) (err error)
//sysnb Setsid() (pid int, err error)
//sysnb Settimeofday(tp *Timeval) (err error)
//sysnb Setuid(uid int) (err error)
//sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
//sys munmap(addr uintptr, length uintptr) (err error)
//sysnb fork() (pid int, err error)
-//sysnb ioctl(fd int, req int, arg int) (err error)
-//sysnb ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) = SYS_ioctl
//sysnb execve(path *byte, argv **byte, envp **byte) (err error)
//sysnb exit(res int) (err error)
//sys sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error)
-//sys fcntlPtr(fd int, cmd int, arg unsafe.Pointer) (val int, err error) = SYS_fcntl
//sys unlinkat(fd int, path string, flags int) (err error)
//sys openat(fd int, path string, flags int, perm uint32) (fdret int, err error)
+//sys getcwd(buf []byte) (n int, err error)
func init() {
execveDarwin = execve
}
func fdopendir(fd int) (dir uintptr, err error) {
- r0, _, e1 := syscallPtr(funcPC(libc_fdopendir_trampoline), uintptr(fd), 0, 0)
- dir = uintptr(r0)
+ r0, _, e1 := syscallPtr(abi.FuncPCABI0(libc_fdopendir_trampoline), uintptr(fd), 0, 0)
+ dir = r0
if e1 != 0 {
err = errnoErr(e1)
}
func libc_fdopendir_trampoline()
-//go:linkname libc_fdopendir libc_fdopendir
//go:cgo_import_dynamic libc_fdopendir fdopendir "/usr/lib/libSystem.B.dylib"
func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
- r0, _, e1 := syscall(funcPC(libc_read_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
- n = int(r0)
- if e1 != 0 {
- err = errnoErr(e1)
- }
- return
-}
-
-func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
- r0, _, e1 := syscall(funcPC(libc_write_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
+ r0, _, e1 := syscall(abi.FuncPCABI0(libc_read_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
n = int(r0)
if e1 != 0 {
err = errnoErr(e1)
func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
// Simulate Getdirentries using fdopendir/readdir_r/closedir.
- const ptrSize = unsafe.Sizeof(uintptr(0))
-
// We store the number of entries to skip in the seek
// offset of fd. See issue #31368.
// It's not the full required semantics, but should handle the case
break
}
// Copy entry into return buffer.
- s := struct {
- ptr unsafe.Pointer
- siz int
- cap int
- }{ptr: unsafe.Pointer(&entry), siz: reclen, cap: reclen}
- copy(buf, *(*[]byte)(unsafe.Pointer(&s)))
+ copy(buf, unsafe.Slice((*byte)(unsafe.Pointer(&entry)), reclen))
buf = buf[reclen:]
n += reclen
cnt++
func rawSyscall(fn, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
func rawSyscall6(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
func syscallPtr(fn, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
-
-// Find the entry point for f. See comments in runtime/proc.go for the
-// function of the same name.
-//go:nosplit
-func funcPC(f func()) uintptr {
- return **(**uintptr)(unsafe.Pointer(&f))
-}