readEhPointerAbs

fn readEhPointerAbs(r: *Reader, enc_ty: EH.PE.Type, addr_size_bytes: u8, endian: Endian) !union(enum) {
    signed: i64,
    unsigned: u64,
} {
    return switch (enc_ty) {
        .absptr => .{
            .unsigned = switch (addr_size_bytes) {
                2 => try r.takeInt(u16, endian),
                4 => try r.takeInt(u32, endian),
                8 => try r.takeInt(u64, endian),
                else => return error.UnsupportedAddrSize,
            },
        },
        .uleb128 => .{ .unsigned = try r.takeLeb128(u64) },
        .udata2 => .{ .unsigned = try r.takeInt(u16, endian) },
        .udata4 => .{ .unsigned = try r.takeInt(u32, endian) },
        .udata8 => .{ .unsigned = try r.takeInt(u64, endian) },
        .sleb128 => .{ .signed = try r.takeLeb128(i64) },
        .sdata2 => .{ .signed = try r.takeInt(i16, endian) },
        .sdata4 => .{ .signed = try r.takeInt(i32, endian) },
        .sdata8 => .{ .signed = try r.takeInt(i64, endian) },
        else => return bad(),
    };
}