Is it possible to extract the formula from the dynamic library?

[rielyn]

There's a library with two functions. These functions are performed by computing some mathematical formulas that need to be found. Is it possible to do something? Is it possible to get her assembler code and re-establish the formula?

https://mega.nz/#!Est2CShD!lKVHiXkClhK6sSTvKTi4UOrhQowq_Syo0zhpgn_Bi8s

[Raziyah00]

objdump -d libSwimEnergy.so > libSwimEnergy.S

You're doing something like that.

00000000000005f0 <ComputeEnergyLap>:
5f0:   44 0f b6 54 24 10       movzbl 0x10(%rsp),%r10d

5f6:   41 bb 64 00 00 00       mov    $0x64,%r11d

5fc:   0f b7 c9                movzwl %cx,%ecx

5ff:   40 0f b6 f6             movzbl %sil,%esi

603:   40 0f b6 ff             movzbl %dil,%edi

607:   45 0f b6 c9             movzbl %r9b,%r9d

60b:   45 0f b6 c0             movzbl %r8b,%r8d

60f:   44 89 d0                mov    %r10d,%eax

612:   44 89 54 24 10          mov    %r10d,0x10(%rsp)

617:   41 0f af c3             imul   %r11d,%eax

61b:   44 0f b7 da             movzwl %dx,%r11d

61f:   89 c2                   mov    %eax,%edx

621:   c1 fa 1f                sar    $0x1f,%edx

624:   41 f7 fb                idiv   %r11d

627:   0f b7 d0                movzwl %ax,%edx

62a:   e9 d1 fe ff ff          jmpq   500 <ComputeEnergyCurrentLength@plt>

62f:   90                      nop

It's quite suitable for study.