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Differences between /userland/myprog4.c (Article 9.5) and /userland/myprog4.c (Article 9)


001 /* Copyright (C) 2005 David Decotigny             001 /* Copyright (C) 2005 David Decotigny
002                                                   002 
003    This program is free software; you can redi    003    This program is free software; you can redistribute it and/or
004    modify it under the terms of the GNU Genera    004    modify it under the terms of the GNU General Public License
005    as published by the Free Software Foundatio    005    as published by the Free Software Foundation; either version 2
006    of the License, or (at your option) any lat    006    of the License, or (at your option) any later version.
007                                                   007    
008    This program is distributed in the hope tha    008    This program is distributed in the hope that it will be useful,
009    but WITHOUT ANY WARRANTY; without even the     009    but WITHOUT ANY WARRANTY; without even the implied warranty of
010    MERCHANTABILITY or FITNESS FOR A PARTICULAR    010    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
011    GNU General Public License for more details    011    GNU General Public License for more details.
012                                                   012    
013    You should have received a copy of the GNU     013    You should have received a copy of the GNU General Public License
014    along with this program; if not, write to t    014    along with this program; if not, write to the Free Software
015    Foundation, Inc., 59 Temple Place - Suite 3    015    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
016    USA.                                           016    USA. 
017 */                                                017 */
018                                                   018 
019 #include <debug.h>                                019 #include <debug.h>
020                                                   020 
021 /**                                               021 /**
022  * @file myprog4.c                                022  * @file myprog4.c
023  * Test unresolved page fault (write to unmapp    023  * Test unresolved page fault (write to unmapped page in user space)
024  */                                               024  */
025                                                   025 
026 int main(void)                                 !! 026 int main()
027 {                                                 027 {
028   char *c;                                        028   char *c;
029   int i;                                          029   int i;
030   bochs_printf("Prog4: Hello world A !\n");       030   bochs_printf("Prog4: Hello world A !\n");
031   for (i = 0 ; i < 100000 ; i++)                  031   for (i = 0 ; i < 100000 ; i++)
032     continue;                                     032     continue;
033   bochs_printf("Prog4: Hello world B !\n");       033   bochs_printf("Prog4: Hello world B !\n");
034                                                   034 
035   /* Force a page fault */                        035   /* Force a page fault */
036   c = (char*) 0x60000000;                         036   c = (char*) 0x60000000;
037   /* Try to read somewhere in user space where    037   /* Try to read somewhere in user space where nothing is mapped */
038   i = *c;                                         038   i = *c;
039                                                   039 
040   bochs_printf("Prog4: Hello world C !\n");       040   bochs_printf("Prog4: Hello world C !\n");
041   for ( ; i> 0 ; i--)                             041   for ( ; i> 0 ; i--)
042     continue;                                     042     continue;
043   bochs_printf("Prog4: Hello world D !\n");       043   bochs_printf("Prog4: Hello world D !\n");
044                                                   044 
045   return 0;                                       045   return 0;
046 }                                                 046 }
                                                      

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