int386, int386x functions causes GP Fault.

QNX Newsgroups (Archives) qdn.public.qnx4.devtools
1

Hi,
Any body knows why int386, int386x functions cause GP fault on QNX
4.25. I was trying to call BIOS int 10h fuctions but in vain.


MKS

2

MKS <mksami@comcast.net> wrote:
: Hi,
: Any body knows why int386, int386x functions cause GP fault on QNX
: 4.25. I was trying to call BIOS int 10h fuctions but in vain.


I don’t know about those specific functions, but a lot of those low-level
Intel functions require this:

Your program must be linked for privity level 1, and the process
must be run by the superuser (root) or a setuid program that’s
owned by the superuser but started by a regular user. For more
information on privity, see the cc -T option or the Linker
PRIVILEGE option.

I hope this helps.

Steve Reid stever@qnx.com
TechPubs (Technical Publications)
QNX Software Systems

3

MKS <mksami@comcast.net> wrote:

Hi,
Any body knows why int386, int386x functions cause GP fault on QNX
4.25. I was trying to call BIOS int 10h fuctions but in vain.

Unless the BIOS is explicitly callable from a 32-bit protected mode
program, you won’t be able to do it.

What BIOS calls were you trying to make/what were you trying to do
with your BIOS calls?

Much of what you might do using BIOS calls in a DOS environment is
done with library calls under QNX.

-David

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