Date: Mon, 4 Nov 2002 18:01:09 -0800 From: Naydoe Maung <nyingelay@hotpop.com> To: Dan Nelson <dnelson@allantgroup.com> Cc: FreeBSD Questions <freebsd-questions@FreeBSD.ORG> Subject: Re: NASM (BSD vs. Linux) Message-ID: <200211041801.09703.nyingelay@hotpop.com> In-Reply-To: <20021105001106.GA12357@dan.emsphone.com> References: <200211041524.43350.nyingelay@hotpop.com> <20021105001106.GA12357@dan.emsphone.com>
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On Monday 04 November 2002 04:11 pm, Dan Nelson wrote: > In the last episode (Nov 04), Naydoe Maung said: > > 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$ > > =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 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. > > Try branding your executable as a Linux binary with brandelf, or call > the write function and link with libc, which will do the syscall for > you and won't require the Linuxulator to run. > > Take a look at the editors/e3 port to see how to write portable > assembly. Thank you so much Dan. "brandelf" works really well on all my ASMs. I=20 actually "brandelf -t Linux" on the executables, and they all generate pr= oper=20 outputs magically. Well, maybe not magically, but I don't quite understa= nd=20 the logic behind it. Anyway... I'm just wondering Dan, or anyone, if you've ever come across the problem= =20 where the "brandelf -t Linux" won't work on your executables that are ELF= =20 formatted and a brand of 'Linux' as well? (I hope that my question makes= =20 sense.) Thanks. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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