sysdeps/unix/sysv/linux/arm/ioperm.c

   1 /* Copyright (C) 1998-2023 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library.  If not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <shlib-compat.h>
  19
  20 #if SHLIB_COMPAT (libc, GLIBC_2_4, GLIBC_2_30)
  21 # include <errno.h>
  22
  23 int
  24 ioperm (unsigned long int from, unsigned long int num, int turn_on)
  25 {
  26   __set_errno (ENOSYS);
  27   return -1;
  28 }
  29 compat_symbol (libc, ioperm, ioperm, GLIBC_2_4);
  30
  31 int
  32 iopl (unsigned int level)
  33 {
  34   __set_errno (ENOSYS);
  35   return -1;
  36 }
  37 compat_symbol (libc, iopl, iopl, GLIBC_2_4);
  38
  39
  40 /* The remaining functions do not have any way to indicate failure.
  41    However, it is only valid to call them after calling ioperm/iopl,
  42    which will have indicated failure.  */
  43
  44 void
  45 outb (unsigned char b, unsigned long int port)
  46 {
  47 }
  48 compat_symbol (libc, outb, outb, GLIBC_2_4);
  49
  50 void
  51 outw (unsigned short b, unsigned long int port)
  52 {
  53 }
  54 compat_symbol (libc, outw, outw, GLIBC_2_4);
  55
  56 void
  57 outl (unsigned int b, unsigned long int port)
  58 {
  59 }
  60 compat_symbol (libc, outl, outl, GLIBC_2_4);
  61
  62 unsigned int
  63 inb (unsigned long int port)
  64 {
  65   return 0;
  66 }
  67 compat_symbol (libc, inb, inb, GLIBC_2_4);
  68
  69
  70 unsigned int
  71 inw (unsigned long int port)
  72 {
  73   return 0;
  74 }
  75 compat_symbol (libc, inw, inw, GLIBC_2_4);
  76
  77
  78 unsigned int
  79 inl (unsigned long int port)
  80 {
  81   return 0;
  82 }
  83 compat_symbol (libc, inl, inl, GLIBC_2_4);
  84
  85 #endif /* SHLIB_COMAT */