wk2 homework

207SE/wk2/dumbStars.asm

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+section .data                           ;Data segment
+
+   star1 db '*', 0x0a   ;new lines 
+   lenStar1 equ $-star1
+   star2 db '**', 0x0a
+   lenStar2 equ $-star2
+   star3 db '***', 0x0a
+   lenStar3 equ $-star3
+   star4 db '****', 0x0a
+   lenStar4 equ $-star4
+   star5 db '*****', 0x0a 
+   lenStar5 equ $-star5
+     
+   newLine db '0x0a'
+   lenNL equ $-newLine 
+	
+section .text          ;Code Segment
+   global _start
+	
+_start:                ;User prompt
+   mov eax, 4
+   mov ebx, 1
+   mov ecx, star1 
+   mov edx, lenStar1 
+   int 0x80
+
+   mov eax, 4
+   mov ebx, 1
+   mov ecx, star2
+   mov edx, lenStar2 
+   int 0x80
+
+   mov eax, 4
+   mov ebx, 1
+   mov ecx, star3 
+   mov edx, lenStar3 
+   int 0x80
+
+   mov eax, 4
+   mov ebx, 1
+   mov ecx, star4 
+   mov edx, lenStar4 
+   int 0x80
+
+   mov eax, 4
+   mov ebx, 1
+   mov ecx, star5 
+   mov edx, lenStar5 
+   int 0x80
+
+;exit condition 
+
+   mov eax, 1 
+   mov ebx, 0 
+   int 0x80 
+   
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207SE/wk2/hello.asm

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+global _start
+
+section .data
+    msg db "Hello, word!", 0x0a
+    len equ $ - msg
+    
+section .text
+_start: 
+    mov eax, 4   ; sys_write system call 
+    mov ebx, 1   ; stdout file descriptor 
+    mov ecx, msg ; bytes to write 
+    mov edx, len ; numbeer of bytes to write 
+    int 0x80     ; perform system call 
+    
+    mov eax, 1   ; sys_exit system call 
+    mov ebx, 0   ; exit status 0 
+    int 0x80     ; perform system call   

207SE/wk2/stars.asm

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+section .data                           ;Data segment
+   userMsg db 'Please enter a number: ' ;Ask the user to enter a number
+   lenUserMsg equ $-userMsg             ;The length of the message
+   plus db '+' 
+   lenPlus equ $-plus
+   
+   newLine db '0x0a'
+   lenNL equ $-newLine 
+   
+section .bss           ;Uninitialized data
+   num resb 5
+	
+section .text          ;Code Segment
+   global _start
+	
+_start:                ;User prompt
+   mov eax, 4
+   mov ebx, 1
+   mov ecx, userMsg
+   mov edx, lenUserMsg
+   int 0x80
+
+                ;Read and store the user input
+   mov eax, 3
+   mov ebx, 2
+  
+   mov ecx, num  ;your input is not an int, but a string. help. 
+
+   mov edx, 5          ;5 bytes (numeric, 1 for sign) of that information
+   int 0x80 
+
+label:
+   
+   mov esi, 4 
+   mov ebp, 35
+   mov edi, 0 
+   jmp stars 
+   
+
+   mov esi, 3 
+   mov ebp, 42 
+   mov edi, 0 
+   jmp stars 
+ 
+ ; Exit code
+     
+   mov eax, 1
+   mov ebx, 0
+   int 0x80
+      
+
+stars:   ;prints amount of stars in esi then returns to ebp line 
+
+   mov eax, 4         ; system write 
+   mov ebx, 1         ; exit code  
+
+   mov ecx, plus      ; this is what we write  
+   mov edx, lenPlus   ; this is how many bytes we write
+   
+   int 0x80     ;write it 
+   
+   inc edi 
+   
+   cmp edi, esi 
+   jl stars ;  if edi is lower than esi, write another star 
+   
+   mov ecx, newLine 
+   mov edx, lenNL  
+   
+   int 0x80 ;add a newline 
+   
+   jmp ebp ;jump back to origin 
+   
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