Disassembly

Disassembly is very useful in finding where a given event occurred. By disassembling code one can see which instructions have been executed and which are to come, and hopefully why something happened.

Use the dis or u (unassemble) command to disassemble code:

   dis address                                  /* Unassemble from address */
   dis mode [[-]names...]                       /* Display, set or unset modes */

An example of unassembly, using default modes:

   debug0:1> u main
   main                  pushl  %ebp
   main+1                movl   %ebp,%esp
   main+3                subl   %esp,20
   main+6                pushl  %ebx
   main+7                pushl  %edi
   main+8                pushl  %esi
   main+9                movl   %eax,&u.u_tss
   ...