On Mon, 01 Dec 2008 09:38:51 +0100 Christoph Mallon <[EMAIL PROTECTED]> wrote:
> Won De Erick schrieb: > > Hello, > > > > I was trying the assembly language program that is specified in the > > following document (p24) to set, reset the built-in watchdog timer for the > > Boser Box. > > > > http://www.boser.com.tw/manual/HS-7001v1.1.pdf > > > > I then installed nasm in FreeBSD 6.2, and added the following lines at the > > beginning. > > > > section .text > > global _start > > > > _start: > > > > I did assemble, link (ld) and got no error. But when I run, I got the > > following error: > > > > # ./watchdog.out > > Bus error (core dumped) > > > MOV DX, 2EH > > MOV AL, 87H > > OUT DX, AL > > OUT DX, AL > > Userland is not allowed to write to ports. That's the bus error you see. > Also without a call to the exit syscall at the end, it will segfault. > See io(4), i386_get_ioperm(2), i386_set_ioperm(2), mem(4). --- Gary Jennejohn _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
