Finally can dump out the parameter type from dwarf standard. Some parameter is store recursively, so need to read out DW_AT_type and get the right die and decode again. Personally I think dwarf is just too hard to parse. Here is the code https://sourceforge.net/p/peter-dwarf/code/254/tree//trunk/src/main/java/com/peterdwarf/dwarf/DwarfLib.java https://sourceforge.net/p/peter-dwarf/code/254/tree//trunk/src/main/java/com/peterdwarf/dwarf/Dwarf.java
heading toward to decode the range address of dwarf, this job is killing me. And I found the information in die is not always meaningful, see below.