Operating Systems File Types(4) Module Magic number Header Text size Data siz Date BSS size Object Symbol table size Owner module Entry point Protection Flag Header Text Object Data Relocation (a)an executable file symbol (b) An archive存档文件 Gao Haichang, Software School, Xidian UniversityOperating Systems Gao Haichang , Software School, Xidian University 11 File Types (4) (a) An executable file (b) An archive 存档文件