On 2020-08-17, Stuart Henderson wrote: >On 2020-08-17, Doug Moss <dougmoss...@yahoo.com> wrote: >> >> Did something change at OpenBSD i386 between 5.9 and 6.0 >> related to parallel port / lpt hardware permissions? >> >> Up to OpenBSD i386 5.9, >> I used to be able to have a working case-LCD-screen >> with lcdproc-0.5.7, driver=hd44780, winamp wiring, with 'allowaperture'. >> At OpenBSD i386 6.0 and after, it fails. > >I think this is due to kernel memory access restrictions that were added. >Setting sysctl kern.allowkmem=1 before securelevel is raised bypasses them >but of course weakens protections.
I think the problem in lcdproc is in the code from this file (port.h) https://github.com/lcdproc/lcdproc/blob/master/server/drivers/port.h I am out of my depth with this code. I have never even seen these calls 'outb' and 'inb' The code looks like it was begun in 1995. Is that what you are talking about 'kernel memory access'? Any advice about this? Is this code amenable to being 'modernized'? If can't modernize the lcdproc code, can you give me specifics about: Do I just put a line in /etc/rc.securelevel kern.allowkmem=1 Thanks
