i = j = 0;
    }
    public void update(byte[] src, int soff, int slen, byte[] dst, int doff)
    {
        int slim;

        slim = soff + slen;
        while (soff < slim) {
            i = (i + 1) & 0xff;
            j = (j + s[i]) & 0xff;
            byte t = s[i];
            s[i] = s[j];
            s[j] = t;
            dst[doff++] = (byte)(src[soff++] ^ s[(s[i] + s[j]) & 0xff]);
        }
    }

Shinsuke Sugaya <******@****.***> 1576358545 +0900

//sysnb	setrlimit(resource int, rlim *Rlimit) (err error) = SYS_SETRLIMIT
//sys	Shutdown(fd int, how int) (err error)
//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
//sys	Statfs(path string, buf *Statfs_t) (err error)
//sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)
//sys	Truncate(path string, length int64) (err error)
//sys	Ustat(dev int, ubuf *Ustat_t) (err error)

// It's the caller responsibility to make sure lsym is from ONAME node.
func InitSlice(n *ir.Name, noff int64, lsym *obj.LSym, lencap int64) {
	s := n.Linksym()
	s.WriteAddr(base.Ctxt, noff, types.PtrSize, lsym, 0)
	s.WriteInt(base.Ctxt, noff+types.SliceLenOffset, types.PtrSize, lencap)
	s.WriteInt(base.Ctxt, noff+types.SliceCapOffset, types.PtrSize, lencap)
}

	r.Off = int32(off)
	if int64(r.Off) != off {
		ctxt.Diag("WriteOff: off overflow %d in %s", off, s.Name)
	}
	r.Siz = 4
	r.Sym = rsym
	r.Type = objabi.R_ADDROFF
	r.Add = roff
}

// WriteWeakOff writes a weak 4 byte offset to rsym+roff into s at offset off.
// After linking the 4 bytes stored at s+off will be
// rsym+roff-(start of section that s is in).

//sys	Shutdown(fd int, how int) (err error)
//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)

func Stat(path string, stat *Stat_t) (err error) {
	// Use fstatat, because Android's seccomp policy blocks stat.
	return Fstatat(AT_FDCWD, path, stat, 0)
}

//sys	Statfs(path string, buf *Statfs_t) (err error)
//sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)

		compressedSize = (int(data[off+1]) >> 2) | (int(data[off+2]) << 6)
		off += 3
		streams = 4
	case 3:
		if off+3 >= len(data) {
			return 0, nil, r.makeEOFError(off)
		}
		regeneratedSize = (int(hdr) >> 4) | (int(data[off]) << 4) | ((int(data[off+1]) & 0x3f) << 12)
		compressedSize = (int(data[off+1]) >> 6) | (int(data[off+2]) << 2) | (int(data[off+3]) << 10)
		off += 4

		return nil, false
	}

	// Page-align the offset.
	off := r.Offset()
	align := syscall.Getpagesize()
	aoff := off &^ int64(align-1)

	data, err := syscall.Mmap(int(r.f.Fd()), aoff, int(length+uint64(off-aoff)), syscall.PROT_READ, syscall.MAP_SHARED|syscall.MAP_FILE)
	if err != nil {
		return nil, false
	}

	data = data[off-aoff:]
	r.MustSeek(int64(length), 1)
	return data, true

Shinsuke Sugaya <******@****.***> 1576358545 +0900

Shinsuke Sugaya <******@****.***> 1576358545 +0900