project2 / project3 com390

Signed-off-by: Amrit Panesar <apanesar@4195tech.com>

COM390/Project2/calc.asm

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+;By Amrit Panesar <apanesar-77260@student.coleman.edu>
+;References code from Steve Hanna of vividmachines.com
+;Launches calc.exe
+
+[Section .text]
+
+global _start
+
+_start:
+
+jmp short GetCommand
+
+CommandReturn:
+	pop ebx			;ebx now holds the handle to the string
+	xor eax,eax
+	push eax 
+	xor eax,eax			;for some reason the registers can be very volatile, did this just in case
+	mov [ebx + 89],al		;insert the NULL character
+	push ebx
+	mov ebx,0x77e6fd35
+	call ebx			;call WinExec(path,showcode)
+
+	xor eax,eax			;zero the register again, clears winexec retval
+	push eax
+	mov ebx, 0x77e798fd
+	call ebx			;call ExitProcess(0);
+
+
+GetCommand:
+	;the N at the end of the db will be replaced with a null character
+	call CommandReturn
+	db "cmd.exe /c calc.exe"