ioperm

[Roland McGrath]

Here are libc patches to add sys/io.h and ioperm a la Linux, using Marcus's
new Mach interfaces.  Please test this and once it works I will put it into
libc.  This is from my 2.3 tree, and you will need a slightly different
makefile hack to get mach_i386 stubs built in a 2.2 tree; just hack the
interface list in mach/Makefile, and I will clean it up when I put it in.

Please test this asap if you can, even if you don't need it right now.
This may be the last thing I slip into libc 2.2.6 and I'd like to get it
cooked and done sooner rather than later.


Thanks,
Roland



2002-03-17  Roland McGrath  <address@hidden>

        * sysdeps/mach/hurd/i386/sys/io.h: New file.
        * sysdeps/mach/hurd/i386/ioperm.c: New file.
        * sysdeps/mach/hurd/i386/Dist: Add them.
        * sysdeps/mach/hurd/i386/Versions
        (libc: GLIBC_2.2.6): New set, add ioperm.
        * sysdeps/mach/configure.in: New check to set HAVE_I386_IO_PERM_MODIFY.
        (mach_interface_list): Check for mach_i386.defs.
        * config.h.in (HAVE_I386_IO_PERM_MODIFY): #undef it.
        * sysdeps/mach/configure: Regenerated.

Index: config.h.in
===================================================================
RCS file: /cvs/glibc/libc/config.h.in,v
retrieving revision 1.44
diff -p -u -r1.44 config.h.in
--- config.h.in 2002/03/16 02:44:23 1.44
+++ config.h.in 2002/03/24 02:11:13
@@ -144,6 +144,9 @@
 /* Mach specific: define if the `host_page_size' RPC is available.  */
 #undef HAVE_HOST_PAGE_SIZE
 
+/* Mach/i386 specific: define if the `i386_io_perm_*' RPCs are available.  */
+#undef HAVE_I386_IO_PERM_MODIFY
+
 /* Sparc64 specific: define if .dynamic section comes before .got for
    shared libs.  */
 #undef  SPARC64_DYNAMIC_BEFORE_GOT
Index: sysdeps/mach/configure
===================================================================
RCS file: /cvs/glibc/libc/sysdeps/mach/configure,v
retrieving revision 1.7
diff -p -u -r1.7 configure
--- sysdeps/mach/configure 2002/02/19 00:21:30 1.7
+++ sysdeps/mach/configure 2002/03/24 02:11:13
@@ -168,20 +168,21 @@ for ifc in mach mach4 \
           clock clock_priv host_priv host_security ledger lock_set \
           processor processor_set task thread_act vm_map \
           memory_object memory_object_default default_pager \
+          i386/mach_i386 \
           ; do
   ac_safe=`echo "mach/${ifc}.defs" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for mach/${ifc}.defs""... $ac_c" 1>&6
-echo "configure:175: checking for mach/${ifc}.defs" >&5
+echo "configure:176: checking for mach/${ifc}.defs" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 180 "configure"
+#line 181 "configure"
 #include "confdefs.h"
 #include <mach/${ifc}.defs>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:185: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:186: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -208,12 +209,12 @@ if test "x$mach_interface_list" = x; the
 fi
 
 echo $ac_n "checking for host_page_size in mach_host.defs""... $ac_c" 1>&6
-echo "configure:212: checking for host_page_size in mach_host.defs" >&5
+echo "configure:213: checking for host_page_size in mach_host.defs" >&5
 if eval "test \"`echo '$''{'libc_cv_mach_host_page_size'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 217 "configure"
+#line 218 "configure"
 #include "confdefs.h"
 #include <mach/mach_host.defs>
 EOF
@@ -239,17 +240,17 @@ fi
 
 ac_safe=`echo "mach/machine/ndr_def.h" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for mach/machine/ndr_def.h""... $ac_c" 1>&6
-echo "configure:243: checking for mach/machine/ndr_def.h" >&5
+echo "configure:244: checking for mach/machine/ndr_def.h" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 248 "configure"
+#line 249 "configure"
 #include "confdefs.h"
 #include <mach/machine/ndr_def.h>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:253: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:254: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -270,17 +271,17 @@ else
   echo "$ac_t""no" 1>&6
 ac_safe=`echo "machine/ndr_def.h" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for machine/ndr_def.h""... $ac_c" 1>&6
-echo "configure:274: checking for machine/ndr_def.h" >&5
+echo "configure:275: checking for machine/ndr_def.h" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 279 "configure"
+#line 280 "configure"
 #include "confdefs.h"
 #include <machine/ndr_def.h>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:284: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
cvs server: I know nothing about sysdeps/mach/hurd/i386/ioperm.c
+{ (eval echo configure:285: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -303,3 +304,33 @@ fi
 
 fi
 
+
+echo $ac_n "checking for i386_io_perm_modify in mach_i386.defs""... $ac_c" 1>&6
+echo "configure:310: checking for i386_io_perm_modify in mach_i386.defs" >&5
+if eval "test \"`echo '$''{'libc_cv_mach_i386_ioports'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  cat > conftest.$ac_ext <<EOF
+#line 315 "configure"
+#include "confdefs.h"
+#include <mach/i386/mach_i386.defs>
+EOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  egrep "i386_io_perm_modify" >/dev/null 2>&1; then
+  rm -rf conftest*
+  libc_cv_mach_i386_ioports=yes
+else
+  rm -rf conftest*
+  libc_cv_mach_i386_ioports=no
+fi
+rm -f conftest*
+
+fi
+
+echo "$ac_t""$libc_cv_mach_i386_ioports" 1>&6
+if test $libc_cv_mach_i386_ioports = yes; then
+  cat >> confdefs.h <<\EOF
+#define HAVE_I386_IO_PERM_MODIFY 1
+EOF
+
+fi
Index: sysdeps/mach/configure.in
===================================================================
RCS file: /cvs/glibc/libc/sysdeps/mach/configure.in,v
retrieving revision 1.9
diff -p -u -r1.9 configure.in
--- sysdeps/mach/configure.in 2002/02/19 00:21:30 1.9
+++ sysdeps/mach/configure.in 2002/03/24 02:11:13
@@ -52,6 +52,7 @@ for ifc in mach mach4 \
           clock clock_priv host_priv host_security ledger lock_set \
           processor processor_set task thread_act vm_map \
           memory_object memory_object_default default_pager \
+          i386/mach_i386 \
           ; do
   AC_CHECK_HEADER(mach/${ifc}.defs, [dnl
   mach_interface_list="$mach_interface_list $ifc"])
@@ -73,3 +74,12 @@ AC_CHECK_HEADER(mach/machine/ndr_def.h, 
   DEFINES="$DEFINES -DNDR_DEF_HEADER='<mach/machine/ndr_def.h>'"], [dnl
 AC_CHECK_HEADER(machine/ndr_def.h, [dnl
   DEFINES="$DEFINES -DNDR_DEF_HEADER='<machine/ndr_def.h>'"])])
+
+AC_CACHE_CHECK(for i386_io_perm_modify in mach_i386.defs,
+              libc_cv_mach_i386_ioports, [dnl
+AC_EGREP_HEADER(i386_io_perm_modify, mach/i386/mach_i386.defs,
+               libc_cv_mach_i386_ioports=yes,
+               libc_cv_mach_i386_ioports=no)])
+if test $libc_cv_mach_i386_ioports = yes; then
+  AC_DEFINE([HAVE_I386_IO_PERM_MODIFY])
+fi
Index: sysdeps/mach/hurd/i386/Dist
===================================================================
RCS file: /cvs/glibc/libc/sysdeps/mach/hurd/i386/Dist,v
retrieving revision 1.1
diff -p -u -r1.1 Dist
--- sysdeps/mach/hurd/i386/Dist 1998/07/04 14:38:01 1.1
+++ sysdeps/mach/hurd/i386/Dist 2002/03/24 02:11:13
@@ -1 +1,3 @@
 static-start.S
+sys/io.h
+ioperm.c
Index: sysdeps/mach/hurd/i386/Versions
===================================================================
RCS file: /cvs/glibc/libc/sysdeps/mach/hurd/i386/Versions,v
retrieving revision 1.2
diff -p -u -r1.2 Versions
--- sysdeps/mach/hurd/i386/Versions 2001/11/16 01:22:31 1.2
+++ sysdeps/mach/hurd/i386/Versions 2002/03/24 02:11:13
@@ -4,4 +4,7 @@ libc {
     __register_frame; __register_frame_table; __deregister_frame;
     __frame_state_for; __register_frame_info_table;
   }
+  GLIBC_2.2.6 {
+    ioperm;
+  }
 }
Index: sysdeps/mach/hurd/i386/sys/io.h
===================================================================
RCS file: io.h
diff -N io.h
--- /dev/null   Tue May  5 13:32:27 1998
+++ sysdeps/mach/hurd/i386/sys/io.h Sat Mar 23 18:11:13 2002
@@ -0,0 +1,178 @@
+/* Access to hardware i/o ports.  GNU/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.  */
+
+#ifndef        _SYS_IO_H
+#define        _SYS_IO_H       1
+
+#include <features.h>
+
+__BEGIN_DECLS
+
+/* If TURN_ON is TRUE, request for permission to do direct i/o on the
+   port numbers in the range [FROM,FROM+NUM-1].  Otherwise, turn I/O
+   permission off for that range.  This call requires root privileges.  */
+extern int ioperm (unsigned long int __from, unsigned long int __num,
+                   int __turn_on) __THROW;
+
+/* Set the I/O privilege level to LEVEL.  If LEVEL>3, permission to
+   access any I/O port is granted.  This call requires root
+   privileges. */
+extern int iopl (int __level) __THROW;
+
+#if defined __GNUC__ && __GNUC__ >= 2
+
+static __inline unsigned char
+inb (unsigned short int port)
+{
+  unsigned char _v;
+
+  __asm__ __volatile__ ("inb %w1,%0":"=a" (_v):"Nd" (port));
+  return _v;
+}
+
+static __inline unsigned char
+inb_p (unsigned short int port)
+{
+  unsigned char _v;
+
+  __asm__ __volatile__ ("inb %w1,%0\noutb %%al,$0x80":"=a" (_v):"Nd" (port));
+  return _v;
+}
+
+static __inline unsigned short int
+inw (unsigned short int port)
+{
+  unsigned short _v;
+
+  __asm__ __volatile__ ("inw %w1,%0":"=a" (_v):"Nd" (port));
+  return _v;
+}
+
+static __inline unsigned short int
+inw_p (unsigned short int port)
+{
+  unsigned short int _v;
+
+  __asm__ __volatile__ ("inw %w1,%0\noutb %%al,$0x80":"=a" (_v):"Nd" (port));
+  return _v;
+}
+
+static __inline unsigned int
+inl (unsigned short int port)
+{
+  unsigned int _v;
+
+  __asm__ __volatile__ ("inl %w1,%0":"=a" (_v):"Nd" (port));
+  return _v;
+}
+
+static __inline unsigned int
+inl_p (unsigned short int port)
+{
+  unsigned int _v;
+  __asm__ __volatile__ ("inl %w1,%0\noutb %%al,$0x80":"=a" (_v):"Nd" (port));
+  return _v;
+}
+
+static __inline void
+outb (unsigned char value, unsigned short int port)
+{
+  __asm__ __volatile__ ("outb %b0,%w1": :"a" (value), "Nd" (port));
+}
+
+static __inline void
+outb_p (unsigned char value, unsigned short int port)
+{
+  __asm__ __volatile__ ("outb %b0,%w1\noutb %%al,$0x80": :"a" (value),
+                       "Nd" (port));
+}
+
+static __inline void
+outw (unsigned short int value, unsigned short int port)
+{
+  __asm__ __volatile__ ("outw %w0,%w1": :"a" (value), "Nd" (port));
+
+}
+
+static __inline void
+outw_p (unsigned short int value, unsigned short int port)
+{
+  __asm__ __volatile__ ("outw %w0,%w1\noutb %%al,$0x80": :"a" (value),
+                       "Nd" (port));
+}
+
+static __inline void
+outl (unsigned int value, unsigned short int port)
+{
+  __asm__ __volatile__ ("outl %0,%w1": :"a" (value), "Nd" (port));
+}
+
+static __inline void
+outl_p (unsigned int value, unsigned short int port)
+{
+  __asm__ __volatile__ ("outl %0,%w1\noutb %%al,$0x80": :"a" (value),
+                       "Nd" (port));
+}
+
+static __inline void
+insb (unsigned short int port, void *addr, unsigned long int count)
+{
+  __asm__ __volatile__ ("cld ; rep ; insb":"=D" (addr),
+                       "=c" (count):"d" (port), "0" (addr), "1" (count));
+}
+
+static __inline void
+insw (unsigned short int port, void *addr, unsigned long int count)
+{
+  __asm__ __volatile__ ("cld ; rep ; insw":"=D" (addr),
+                       "=c" (count):"d" (port), "0" (addr), "1" (count));
+}
+
+static __inline void
+insl (unsigned short int port, void *addr, unsigned long int count)
+{
+  __asm__ __volatile__ ("cld ; rep ; insl":"=D" (addr),
+                       "=c" (count):"d" (port), "0" (addr), "1" (count));
+}
+
+static __inline void
+outsb (unsigned short int port, const void *addr, unsigned long int count)
+{
+  __asm__ __volatile__ ("cld ; rep ; outsb":"=S" (addr),
+                       "=c" (count):"d" (port), "0" (addr), "1" (count));
+}
+
+static __inline void
+outsw (unsigned short int port, const void *addr, unsigned long int count)
+{
+  __asm__ __volatile__ ("cld ; rep ; outsw":"=S" (addr),
+                       "=c" (count):"d" (port), "0" (addr), "1" (count));
+}
+
+static __inline void
+outsl (unsigned short int port, const void *addr, unsigned long int count)
+{
+  __asm__ __volatile__ ("cld ; rep ; outsl":"=S" (addr),
+                       "=c" (count):"d" (port), "0" (addr), "1" (count));
+}
+
+#endif /* GNU C */
+
+__END_DECLS
+#endif /* _SYS_IO_H */