def seg_by_addr(self, addr):
        ida_seg = idaapi.getseg(addr)
        name = "<no name>"
        if ida_seg is not None:
            name = ida_seg.name
        if self.vmmap is None:
            self._get_vmmap()
        for start, end, perms, n in self.vmmap:
            if addr >= start and addr < end:
                if n == "": n = name
                return self.angrdbg_mod.Segment(n, start, end, perms)
        # fallback on ida segs
        perms = 0
        perms |= SEG_PROT_R if ida_seg.perm & idaapi.SEGPERM_READ else 0
        perms |= SEG_PROT_W if ida_seg.perm & idaapi.SEGPERM_WRITE else 0
        perms |= SEG_PROT_X if ida_seg.perm & idaapi.SEGPERM_EXEC else 0
        return self.angrdbg_mod.Segment(ida_seg.name, ida_seg.start_ea, ida_seg.end_ea, perms) 

def seg_by_name(self, name):
        ida_seg = idaapi.get_segm_by_name(name)
        if ida_seg is None:
            return None
        perms = 0
        perms |= SEG_PROT_R if ida_seg.perm & idaapi.SEGPERM_READ else 0
        perms |= SEG_PROT_W if ida_seg.perm & idaapi.SEGPERM_WRITE else 0
        perms |= SEG_PROT_X if ida_seg.perm & idaapi.SEGPERM_EXEC else 0
        return self.angrdbg_mod.Segment(name, ida_seg.start_ea, ida_seg.end_ea, perms) 

def seg_by_addr(self, addr):
        ida_seg = idaapi.getseg(addr)
        if ida_seg is None:
            return None
        perms = 0
        perms |= SEG_PROT_R if ida_seg.perm & idaapi.SEGPERM_READ else 0
        perms |= SEG_PROT_W if ida_seg.perm & idaapi.SEGPERM_WRITE else 0
        perms |= SEG_PROT_X if ida_seg.perm & idaapi.SEGPERM_EXEC else 0
        return self.angrdbg_mod.Segment(ida_seg.name, ida_seg.start_ea, ida_seg.end_ea, perms) 

def is_read_only_segment(ea):
  mask_perms = idaapi.SEGPERM_WRITE | idaapi.SEGPERM_READ
  perms = idc.GetSegmentAttr(ea, idc.SEGATTR_PERM)
  return idaapi.SEGPERM_READ == (perms & mask_perms) 

def is_read_only_segment(ea):
  mask_perms = idaapi.SEGPERM_WRITE | idaapi.SEGPERM_READ
  perms = idc.get_segm_attr(ea, idc.SEGATTR_PERM)
  return idaapi.SEGPERM_READ == (perms & mask_perms) 

def r(self):
        return bool(self._segment.perm & idaapi.SEGPERM_READ) 

def r(self, value):
        if value:
            self._segment.perm |= idaapi.SEGPERM_READ

        else:
            self._segment.perm &= ~idaapi.SEGPERM_READ 

def get_value_type(ea):
    addr_type = T_VALUE

    if not idaapi.is_loaded(ea):
        return addr_type

    segm_name = idc.get_segm_name(ea)
    segm = idaapi.getseg(ea)
    flags = idc.get_full_flags(ea)
    is_code = idc.is_code(flags)

    if "stack" in segm_name.lower() or \
    (dbg.stack_segm and dbg.stack_segm.start_ea == segm.start_ea):
        addr_type = T_STACK

    elif "heap" in segm_name.lower():
        addr_type = T_HEAP

    elif segm is not None:
        if not is_code and segm.perm & idaapi.SEGPERM_READ and \
        segm.perm & idaapi.SEGPERM_WRITE and \
        segm.perm & idaapi.SEGPERM_EXEC:
            addr_type = T_RWX

        elif is_code or \
        (segm.perm & idaapi.SEGPERM_READ and segm.perm & idaapi.SEGPERM_EXEC):
            addr_type = T_CODE

        elif segm.perm & idaapi.SEGPERM_READ and \
        segm.perm & idaapi.SEGPERM_WRITE:
            addr_type = T_DATA

        elif segm.perm & idaapi.SEGPERM_READ:
            addr_type = T_RODATA

    return addr_type

# ----------------------------------------------------------------------- 

def update_content_viewers(self, n=None):
        if n is None:
            n = self.GetLineNo()

        item = self.get_item(n)

        self.dav.clear()
        self.hv.clear()
        self.iv.clear()

        if item is not None:
            if item.type == Item.TYPE_CODE:
                # get disassembly and hex stream
                dis = self.payload.da.get_disasm(item.ea)
                for line in dis:
                    self.dav.add_line(line[0])
                    self.hv.add_line(line[1])

                # get various info
                seg = idaapi.getseg(item.ea)
                if seg:
                    name = idaapi.get_true_segm_name(seg)
                    perm = seg.perm
                    ltype = "ld" if seg.is_loader_segm() else "dbg"
                    ea_start = seg.startEA
                    ea_end = seg.endEA

                    perms = ""
                    perms += "R" if perm & idaapi.SEGPERM_READ != 0 else "."
                    perms += "W" if perm & idaapi.SEGPERM_WRITE != 0 else "."
                    perms += "X" if perm & idaapi.SEGPERM_EXEC != 0 else "."
                    self.iv.add_line("<%s> [%X - %X], %s, [%s]" % (name, ea_start, ea_end, ltype, perms))
            else:
                stype = GetStringType(item.ea)
                if stype is not None:
                    scontent = GetString(item.ea, -1, stype)
                    if scontent != None and len(scontent):
                        self.dav.add_line(idaapi.COLSTR("\"%s\"" % scontent, idaapi.SCOLOR_DSTR))
                        # length = idaapi.get_max_ascii_length(item.ea, stype, idaapi.ALOPT_IGNHEADS)
                        # self.hv.add_line()
                else:
                    scontent = GetString(item.ea, -1, ASCSTR_C)
                    if scontent != None and len(scontent):
                        self.dav.add_line("\"%s\"" % scontent)

        self.dav.update()
        self.hv.update()
        self.iv.update()