module debugging error

[Jungsoo Sohn]

ddd commnad ....:

(gdb) add-symbol-file dvr.o 0xc000d060

add symbol table from file "dvr.o" at

           .text_addr = 0xc000d060

(gdb) b dvr_rw_dev

Breakpoint 3 at 0xc000d30c

(gdb) c

write!

 

Program received signal SIGTRAP, Trace/breakpoint trap.

0xffffffffc000d30c in ?? ()

(gdb) bt

#0  0xffffffffc000d30c in ?? ()

#1  0xffffffffc000d2e0 in ?? ()

#2  0xffffffff8013ae88 in sys_write (fd=1, buf=0x10000020 "tesging", count=0) 
at read_write.c:208

(gdb)

"0xffffffffc000d30c in ?? ()" what's mean??? How can I solve this...



Thanks.

JungSoo Sohn