Tags: .
What does this code do? The function has 4 arguments and it is compiled by GCC for Linux x64 ABI (i.e., arguments are passed in registers).
<f>:
0: mov r8,rdi
3: push rbx
4: mov rdi,rsi
7: mov rbx,rdx
a: mov rsi,r8
d: xor rdx,rdx
begin:
10: lods rax,QWORD PTR ds:[rsi]
12: div rbx
15: stos QWORD PTR es:[rdi],rax
17: loop begin
19: pop rbx
1a: mov rax,rdx
1d: ret
More challenges: challenges.re; about solutions: challenges.re/#Solutions.