36 lines
667 B
NASM
36 lines
667 B
NASM
global _start
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extern main
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section .text
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_start:
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; Extract argc and argv from the stack
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mov rdi, [rsp] ; rdi = argc
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lea rsi, [rsp + 8] ; rsi = argv (pointer to array of strings)
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; Call main(argc, argv)
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call main ; main returns int in rax
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; Exit with main's return value
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mov rdi, rax ; exit code
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mov rax, 60 ; syscall: exit
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syscall
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global nub_strcmp
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nub_strcmp:
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xor rdx, rdx
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.loop:
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mov al, [rsi + rdx]
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mov bl, [rdi + rdx]
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inc rdx
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cmp al, bl
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jne .not_equal
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cmp al, 0
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je .equal
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jmp .loop
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.not_equal:
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mov rax, 0
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ret
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.equal:
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mov rax, 1
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ret |