Can i modify the previously created .so file using android NDK?

Currently I just started to using NDK and now I have some question in my mind.

Is there anyway to modify previously created .so file using NDK? can we modify that .so file?I just want to change some specification and want to rebuild.

Any help and suggestion will be appreciated.
Thanks in advance

Edit

000064e0 <Pow2>:
    64e0:   e260201e    rsb r2, r0, #30 ; 0x1e
    64e4:   e1a02802    lsl r2, r2, #16
    64e8:   e3a00001    mov r0, #1  ; 0x1
    64ec:   e1a02842    asr r2, r2, #16
    64f0:   e2423001    sub r3, r2, #1  ; 0x1
    64f4:   e1a00310    lsl r0, r0, r3
    64f8:   e59f3054    ldr r3, [pc, #84]   ; 6554 <Pow2+0x74>
    64fc:   e59fc054    ldr ip, [pc, #84]   ; 6558 <Pow2+0x78>
    6500:   e1a01301    lsl r1, r1, #6
    6504:   e08f3003    add r3, pc, r3
    6508:   e92d0030    push    {r4, r5}
    650c:   e793c00c    ldr ip, [r3, ip]
    6510:   e201481f    and r4, r1, #2031616    ; 0x1f0000
    6514:   e1a04844    asr r4, r4, #16
    6518:   e08c5084    add r5, ip, r4, lsl #1
    651c:   e1a04084    lsl r4, r4, #1
    6520:   e19cc0b4    ldrh    ip, [ip, r4]
    6524:   e1d540b2    ldrh    r4, [r5, #2]
    6528:   e3e05902    mvn r5, #32768  ; 0x8000
    652c:   e00510c1    and r1, r5, r1, asr #1
    6530:   e080080c    add r0, r0, ip, lsl #16
    6534:   e064c00c    rsb ip, r4, ip
    6538:   e161018c    smulbb  r1, ip, r1
    653c:   e0400081    sub r0, r0, r1, lsl #1
    6540:   e1a00250    asr r0, r0, r2
    6544:   e1a00800    lsl r0, r0, #16
    6548:   e1a00840    asr r0, r0, #16
    654c:   e8bd0030    pop {r4, r5}
    6550:   e12fff1e    bx  lr
    6554:   0000abcc    .word   0x0000abcc
    6558:   00000078    .word   0x00000078

You cannot change the .so file directly. You can, however, change the source code (in C or C++) and recompile it using the NDK. If you do not have access to the source, however, your chances are rather slim.

You may be able to de-compile/disassemble the .so, but it will prove extremely difficult if not impossible to recompile it back into .so