Dan Mick wrote:
>>> I am porting linux application to Solaris 10.
>>> Here I am facing the problem to find an equivalent of iopl() (Inpu /
>>> output privilage) function of Linux to Solaris 10.
>>
>> Why does the application use iopl() on Linux ? What does it actually
>> do? I've read the Linux man page and I can't quite understand what it
>> does but I think the closest Solaris equivalent might be running with
>> the sys_devices privilege [ see privileges(5) ].
>
> There is an undocumented system call that gives IO privileges, which is
> probably what iopl() does. As such, you're on your own if you use it,
> but search the source for V86SC_IOPL.
>
> #include <sys/sysi86.h>
> #define IOPL 0x3000 /* PL "3", shifted into correct pos */
>
> int
> main(void)
> {
>
> if (sysi86(SI86V86, V86SC_IOPL, IOPL) != 0) {
> perror("IOPL");
> exit(1);
> }
Looking at the implementation of that syscall the userland process will
need sys_config not sys_devices to make this (undocumented) syscall.
--
Darren J Moffat
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