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:
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
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
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
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$
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
As you can see here, It compiled and linked without any errors, however n=
o=20
appropriate output is being generated. There were no problems running it=
on=20
Linux. I heard some issues about different sys calls and interrupts on L=
inux=20
and BSD, but I thought since the Linux driver was loaded there should be =
no=20
problems running Linux oriented programs. I'm very confused, and I'm sur=
e=20
I'm missing out some stuff. Help me please.
Thank You
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