Date: Mon, 4 Nov 2002 15:24:43 -0800 From: Naydoe Maung <nyingelay@hotpop.com> To: FreeBSD Questions <freebsd-questions@FreeBSD.ORG> Subject: NASM (BSD vs. Linux) Message-ID: <200211041524.43350.nyingelay@hotpop.com>
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- FreeBSD 4.7-RELEASE #0: i386
- NASM version 0.98.33 compiled on Oct 31 2002
- Linux driver already loaded
Simple assembly code for Hello World:
==================
SECTION .data
msg DB "Hello, World!", 0Ah, 0Ah
MSGLEN EQU 14
SECTION .text
global _start
_start:
mov eax, 4
mov ebx, 1
mov ecx, msg
mov edx, MSGLEN
int 80h
mov eax, 4
mov ebx, 1
mov ecx, msg
mov edx, MSGLEN
int 80h
mov eax, 4
mov ebx, 1
mov ecx, msg
mov edx, MSGLEN
int 80h
==================
Shell output:
bash-2.05b$ nasm -f elf hello.asm
bash-2.05b$ ld -o hello hello.o
bash-2.05b$ ./hello
bash-2.05b$ ls
hello hello.asm hello.o
bash-2.05b$
==================
As you can see here, It compiled and linked without any errors, however no
appropriate output is being generated. There were no problems running it on
Linux. I heard some issues about different sys calls and interrupts on Linux
and BSD, but I thought since the Linux driver was loaded there should be no
problems running Linux oriented programs. I'm very confused, and I'm sure
I'm missing out some stuff. Help me please.
Thank You
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