Nm command Problems

Nm command problems-general Linux technology-Linux programming and kernel information, the following is a detailed description. Who can explain the meaning of the nm output items ??


Hello. c is the source file, and hello. o is the compiled file.
/* Hello. c */



# Include



Int main (int argc, char * argv [])

{

Printf ("Hello, World! \ N ");

Return 0;

}


The following content appears after you input nm hello. o. What does it mean ??


/*.................................................................................................................. ............

Hello. o:

080494a4 D _ DYNAMIC

08049570 D _ GLOBAL_OFFSET_TABLE _

08048478 r_ IO_stdin_used

W_jv_registerclasses

08049494 d _ CTOR_END __

08049490 d _ CTOR_LIST __

0804949c d _ DTOR_END __

08049498 d _ DTOR_LIST __

0804848c r _ FRAME_END __

080494a0 d _ JCR_END __

080494a0 d _ JCR_LIST __

08049590 A _ bss_start

08049584 D _ data_start

08048434 t _ do_global_ctors_aux

08048308 t _ do_global_dtors_aux

08049588 D _ dso_handle

08049490 A _ fini_array_end

08049490 A _ fini_array_start

W _ gmon_start __

08049490 A _ init_array_end

08049490 A _ init_array_start

080483f0 T _ libc_csu_fini

0804839c T _ libc_csu_init

U _ libc_start_main @ GLIBC_2.0

08049490 A _ preinit_array_end

08049490 A _ preinit_array_start

08049590 A _ edata

08049594 A _ end

08048458 T _ fini

08048474 r_fp_hw

08048278 T _ init

080482c0 T _ start

080482e4 t call_gmon_start

08049590 B completed.1

08049584 W data_start

0804833c t frame_dummy

08048368 T main

0804958c d p.0

U printf @ GLIBC_2.0