mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-25 12:11:10 +00:00
55c303acb8
* sysdeps/mach/hurd/i386/ioperm.c (ioperm): Correct off by one
error in range calculation.
55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
/* Access to hardware i/o ports. Hurd/x86 version.
|
|
Copyright (C) 2002 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <sys/io.h>
|
|
#include <hurd.h>
|
|
#include <mach/i386/mach_i386.h>
|
|
|
|
int
|
|
ioperm (unsigned long int from, unsigned long int num, int turn_on)
|
|
{
|
|
#if ! HAVE_I386_IO_PERM_MODIFY
|
|
return __hurd_fail (ENOSYS);
|
|
#else
|
|
error_t err;
|
|
device_t devmaster;
|
|
|
|
/* With the device master port we get a capability that represents
|
|
this range of io ports. */
|
|
err = __get_privileged_ports (NULL, &devmaster);
|
|
if (! err)
|
|
{
|
|
io_perm_t perm;
|
|
err = __i386_io_perm_create (devmaster, from, from + num - 1, &perm);
|
|
__mach_port_deallocate (__mach_task_self (), devmaster);
|
|
if (! err)
|
|
{
|
|
/* Now we add or remove that set from our task's bitmap. */
|
|
err = __i386_io_perm_modify (__mach_task_self (), perm, turn_on);
|
|
__mach_port_deallocate (__mach_task_self (), perm);
|
|
}
|
|
|
|
if (err == MIG_BAD_ID) /* Old kernels don't have these RPCs. */
|
|
err = ENOSYS;
|
|
}
|
|
|
|
return err ? __hurd_fail (err) : 0;
|
|
#endif
|
|
}
|