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what commands affect flags?(hence trigger jmps)

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reverser69
Expert Cheater

Reputation: 0

Joined: 03 Sep 2014
Posts: 107

Posted: Sat Jun 06, 2020 8:55 am Post subject: what commands affect flags?(hence trigger jmps)

hi all
in this code what causes the second jump to be triggered?

Code:

mov [rsp+18],rbp
push rdi
sub rsp,30 { 48 }
mov edi,[rcx+10]
mov rbp,rdx
mov rax,rcx
test rdi,rdi
je FCPrimal.exe+4D94049
mov ecx,[rcx+20]
mov [rsp+48],rsi
mov esi,00000001 { 1 }
movaps [rsp+20],xmm6
movss xmm6,[FCPrimal.exe+326F470] { (0.00) }
shl esi,cl
dec rdi
mov rcx,[rax+08]
je FCPrimal.exe+4D94034 ----> this one.
mov [rsp+40],rbx

ParkourPenguin
I post too much

Reputation: 140

Joined: 06 Jul 2014
Posts: 4300

Posted: Sat Jun 06, 2020 9:54 am Post subject:

dec je checks the zf, so it will branch if rdi == 0 _________________ I don't know where I'm going, but I'll figure it out when I get there.

reverser69
Expert Cheater

Reputation: 0

Joined: 03 Sep 2014
Posts: 107

Posted: Sat Jun 06, 2020 11:02 am Post subject:

thx

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