34 lines
1.0 KiB
NASM
34 lines
1.0 KiB
NASM
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# edi = index of data_items
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# ebx = largest data item found
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# eax = current data item
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.global _start
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.intel_syntax noprefix
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.section .text
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_start:
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mov edi, 0 # copy 0 into edi - first addresss
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mov eax, [data_items + edi * 4] # move the first number (edi * 4) to eax
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mov ebx, eax # move ebx to eax
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jmp start_loop
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start_loop:
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cmp eax, 0 # check if eax is 0, return value stored in EFLAGS register
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je loop_exit # checks EFLAGS if cmp is equal
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inc edi # move to the next number (increase index which is edi)
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mov eax, [data_items + edi * 4] # move the next number (edi * 4) to eax
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cmp eax, ebx # compare largest item (ebx) to current item (eax)
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jle start_loop # if eax is less than ebx - jump to start_loop
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mov ebx, eax # move eax to ebx
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jmp start_loop # jump back to start_loop
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loop_exit:
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mov eax, 1 # move '1' into eax (exit syscall)
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int 0x80 # call kernel interrupt to exit program
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.section .data
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data_items:
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.long 3, 67, 34, 222, 45, 75, 54, 34, 44, 33, 22, 11, 66, 0
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