I am having trouble figuring out this code. We are supposed to difuse this bomb by figuring out how to not enter the explode bomb calls by entering 2 digits seperated by a space. I found out the 2 digits stuff by myself. I realize that the mov and jmps in the second half of the problem is basically a case statement, but i cant seem to get out of it. I thought that the jmpq was the key to this whole problem. It seems the only number that effects this code is the first one i put in. The second 1 seems to not effect it much at all. I am assuming i use the jmpq to jump past all the case statements and go straight to the last two operations. If my first number is greater than 8 the bomb explodes, other than that the other number seems to kind of effect where the jump goes but i couldnt get it past a certain point. Please help me understand what is going on in this code.
Dump of assembler code for function phase_3:
=> 0x0000000000400f53 <+0>: sub $0x18,%rsp
0x0000000000400f57 <+4>: lea 0x8(%rsp),%rcx
0x0000000000400f5c <+9>: lea 0xc(%rsp),%rdx
0x0000000000400f61 <+14>: mov $0x4027ad,%esi
0x0000000000400f66 <+19>: mov $0x0,%eax
0x0000000000400f6b <+24>: callq 0x400c30 <__isoc99_sscanf@plt>
0x0000000000400f70 <+29>: cmp $0x1,%eax
0x0000000000400f73 <+32>: jg 0x400f7a <phase_3+39>
0x0000000000400f75 <+34>: callq 0x40154f <explode_bomb>
0x0000000000400f7a <+39>: cmpl $0x7,0xc(%rsp)
0x0000000000400f7f <+44>: ja 0x400fbd <phase_3+106>
0x0000000000400f81 <+46>: mov 0xc(%rsp),%eax
0x0000000000400f85 <+50>: jmpq *0x4024e0(,%rax,8)
0x0000000000400f8c <+57>: mov $0x20d,%eax
0x0000000000400f91 <+62>: jmp 0x400fce <phase_3+123>
0x0000000000400f93 <+64>: mov $0x313,%eax
0x0000000000400f98 <+69>: jmp 0x400fce <phase_3+123>
0x0000000000400f9a <+71>: mov $0x37f,%eax
0x0000000000400f9f <+76>: jmp 0x400fce <phase_3+123>
0x0000000000400fa1 <+78>: mov $0x2dc,%eax
0x0000000000400fa6 <+83>: jmp 0x400fce <phase_3+123>
0x0000000000400fa8 <+85>: mov $0x125,%eax
---Type <return> to continue, or q <return> to quit---
0x0000000000400fad <+90>: jmp 0x400fce <phase_3+123>
0x0000000000400faf <+92>: mov $0x168,%eax
0x0000000000400fb4 <+97>: jmp 0x400fce <phase_3+123>
0x0000000000400fb6 <+99>: mov $0x2d9,%eax
0x0000000000400fbb <+104>: jmp 0x400fce <phase_3+123>
0x0000000000400fbd <+106>: callq 0x40154f <explode_bomb>
0x0000000000400fc2 <+111>: mov $0x0,%eax
0x0000000000400fc7 <+116>: jmp 0x400fce <phase_3+123>
0x0000000000400fc9 <+118>: mov $0x1cb,%eax
0x0000000000400fce <+123>: cmp 0x8(%rsp),%eax
0x0000000000400fd2 <+127>: je 0x400fd9 <phase_3+134>
0x0000000000400fd4 <+129>: callq 0x40154f <explode_bomb>
0x0000000000400fd9 <+134>: add $0x18,%rsp
0x0000000000400fdd <+138>: retq
