School Commit Init

Anul 1/Semestrul 1/ASC/Test/Test.asm

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+bits 32 ; assembling for the 32 bits architecture
+
+; declare the EntryPoint (a label defining the very first instruction of the program)
+global start        
+
+; declare external functions needed by our program
+extern exit               ; tell nasm that exit exists even if we won't be defining it
+import exit msvcrt.dll    ; exit is a function that ends the calling process. It is defined in msvcrt.dll
+                          ; msvcrt.dll contains exit, printf and all the other important C-runtime specific functions
+
+; our data is declared here (the variables needed by our program)
+segment data use32 class=data
+    ; ...
+    a db 255
+    b dd 100h
+
+
+; our code starts here
+segment code use32 class=code
+    start:
+       
+        
+        ; exit(0)
+        push    dword 0      ; push the parameter for exit onto the stack
+        call    [exit]       ; call exit to terminate the program

Anul 1/Semestrul 1/ASC/Test/new 1.asm

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+; The code below will calculate the result of some arithmetic operations in the EAX register, save the value of the registers, then display the result value and restore the value of the registers.
+bits 32
+
+global start        
+
+; declare extern functions
+extern exit, printf  
+import exit msvcrt.dll    
+import printf msvcrt.dll    ; tell assembler function is found in library msvcrt.dll
+                          
+segment data use32 class=data
+	
+	
+segment code use32 class=code
+	start:
+		; will calculate 20 + 123 + 7 in EAX
+		mov al, 250>>4
+        mov al,0ffffh>>4
+        mov al,0efffh>>12
+        mov al,-1>>4
+        mov al,-1>>12
+		push dword 0      ; we place on stack parameter for exit
+		call [exit]       ; call exit to end the program