(gdb) run
The program being debugged has been started already.
Start it from the beginning? (y or n) y
Starting program: /root/first

Breakpoint 1, 0x00010054 in _start ()
(gdb) disassemble
Dump of assembler code for function _start:
=> 0x00010054 <+0>: mov r0, pc
   0x00010058 <+4>: mov r1, #2
   0x0001005c <+8>: add r2, r1, r1
   0x00010060 <+12>:    bkpt    0x0000
End of assembler dump.
(gdb) info registers
r0             0x0  0
r1             0x0  0
r2             0x0  0
r3             0x0  0
r4             0x0  0
r5             0x0  0
r6             0x0  0
r7             0x0  0
r8             0x0  0
r9             0x0  0
r10            0x0  0
r11            0x0  0
r12            0x0  0
sp             0xbefff880   0xbefff880
lr             0x0  0
pc             0x10054  0x10054 <_start>
cpsr           0x10 16
(gdb) si
0x00010058 in _start ()
(gdb) info registers
r0             0x1005c  65628
r1             0x0  0
r2             0x0  0
r3             0x0  0
r4             0x0  0
r5             0x0  0
r6             0x0  0
r7             0x0  0
r8             0x0  0
r9             0x0  0
r10            0x0  0
r11            0x0  0
r12            0x0  0
sp             0xbefff880   0xbefff880
lr             0x0  0
pc             0x10058  0x10058 <_start+4>
cpsr           0x10 16
(gdb)