51 lines
1.5 KiB
NASM
51 lines
1.5 KiB
NASM
bits 32 ; assembling for the 32 bits architecture
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; declare the EntryPoint (a label defining the very first instruction of the program)
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global start
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; declare external functions needed by our program
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extern exit,scanf ; tell nasm that exit exists even if we won't be defining it
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import exit msvcrt.dll ; exit is a function that ends the calling process. It is defined in msvcrt.dll
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; msvcrt.dll contains exit, printf and all the other important C-runtime specific functions
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import scanf msvcrt.dll
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;Read two numbers a and b (in base 10) from the keyboard and calculate their product. This value will be stored in a variable called "result" (defined in the data segment).
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segment data use32 class=data
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query db "%d",0
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a dd 0
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b dd 0
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result dq 0
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; our code starts here
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segment code use32 class=code
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start:
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; ...
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push dword a
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push dword query
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call [scanf]
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add ESP,4*2
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push dword b
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push dword query
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call [scanf]
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add ESP,4*2
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mov EAX,[a]
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imul dword [b]
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mov [result],EAX
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mov [result+4],EDX
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; exit(0)
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push dword 0 ; push the parameter for exit onto the stack
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call [exit] ; call exit to terminate the program
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import socket
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s=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
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msg="hey"
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sleep(10)
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s.sendto(str.encode(msg),("127.0.0.1",5555))
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msg,adr=s.recvfrom(10)
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print (msg.decode()) |