UMBC | CMSC313 |
;; Filename: jdoe2p0.asm ;; Name: Ima Student ;; Email: jdoe2@umbc.edu ;; Date: 23 Sep 2005 ;; Course: CMSC-313 ;; Description: (Your psuedocode goes here. Must be detailed) ;; Notes: (As needed, such has how to assemble) ;; ;; ;; jdoe2p0.asm a first program for nasm for Linux, Intel, gcc ;; ;; assemble: nasm -f elf -l jdoe2p0.lst jdoe2p0.asm ;; link: gcc -o jdoe2p0 jdoe2p0.o ;; run: jdoe2p0 ;; output is: Hello World SECTION .data ; data section msg: db "Hello World",10 ; the string to print, 10=cr len: equ $-msg ; "$" means "here" ; len is a value, not an address SECTION .text ; code section global main ; make label available to linker main: ; standard gcc entry point mov edx,len ; arg3, length of string to print mov ecx,msg ; arg2, pointer to string mov ebx,1 ; arg1, where to write, screen mov eax,4 ; write command to int 80 hex int 0x80 ; interrupt 80 hex, call kernel mov ebx,0 ; exit code, 0=normal mov eax,1 ; exit command to kernel int 0x80 ; interrupt 80 hex, call kernel
;; Filename: jdoe2p0.asm ;; Name: Ima Student ;; Email: jdoe2@umbc.edu ;; Date: 23 Sep 2005 ;; Course: CMSC313 ;; Description: (Your psuedocode goes here. Must be detailed) ;; Notes: (As needed, such has how to compile)