1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
%include "unistd.asm"
%include "utils.asm"
stdout equ 1
global _start
section .text
_start:
mov rcx, [rsp] ; Get number of arguments
mov rdi, [rsp + rcx * 8] ; Get last argument
mov rax, SYS_access ; Check if file exists and is readable
mov esi, R_OK
syscall
test rax, rax
jnz .exit_err
mov rax, SYS_open
xor esi, esi
xor edx, edx
syscall
mov r8d, eax ; Move fd into r8
mov rax, SYS_mmap
xor edi, edi ; Let the kernel choose the address
mov rsi, 12288
mov rdx, PROT_READ
mov r10d, MAP_PRIVATE
xor r9d, r9d
syscall
cmp rax, -1 ; Exit on error
je .exit_err
xor r8d, r8d ; score
.loop:
cmp byte [rax], 0
je .exit
mov ecx, [rax]
add rax, 4
mov edx, ecx
and ecx, 0xff
shr edx, 2 * 8
and edx, 0xff
sub ecx, 'A' - 1
sub edx, 'X' - 1
add r8d, edx ; Add score selected shape
cmp ecx, edx
je .draw
inc edx
mov edi, edx
shr edi, 2
or edx, edi
and edx, 0b11
cmp ecx, edx
je .loop
add r8d, 3 ; win
.draw:
add r8d, 3
jmp .loop
.exit:
mov edi, stdout
mov esi, r8d
call write_ulong
mov rax, SYS_exit
xor edi, edi
syscall
.exit_err:
mov rax, SYS_exit
mov edi, 1
syscall
|
