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Differences between /userland/myprog9.c (Article 9.5) and /userland/myprog9.c (Article 9.5)


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 <crt.h>                                  019 #include <crt.h>
020 #include <libc.h>                                 020 #include <libc.h>
021 #include <stdarg.h>                               021 #include <stdarg.h>
022 #include <debug.h>                                022 #include <debug.h>
023                                                   023 
024 /**                                               024 /**
025  * @file myprog9.c                                025  * @file myprog9.c
026  *                                                026  *
027  * mmap/munmap tests                              027  * mmap/munmap tests
028  *                                                028  *
029  * We use the temporary syscall 4004 to dump t    029  * We use the temporary syscall 4004 to dump the list of VRs in the
030  * thread's address space                         030  * thread's address space
031  */                                               031  */
032                                                   032 
033 int main(void)                                    033 int main(void)
034 {                                                 034 {
035   char *zoup;                                     035   char *zoup;
036   int fd;                                         036   int fd;
037                                                   037 
038   fd = open("/dev/zero", O_RDWR);                 038   fd = open("/dev/zero", O_RDWR);
039   zoup = mmap((void*)4096, 8*1024*1024,           039   zoup = mmap((void*)4096, 8*1024*1024,
040               PROT_READ | PROT_WRITE,             040               PROT_READ | PROT_WRITE,
041               MAP_SHARED,                         041               MAP_SHARED,
042               fd, 34);                            042               fd, 34);
043   close(fd);                                      043   close(fd);
044                                                   044 
045   bochs_printf("mapped @%x\n", (unsigned)zoup)    045   bochs_printf("mapped @%x\n", (unsigned)zoup);
046                                                   046 
047   /* Do a fork() here to complicate things */     047   /* Do a fork() here to complicate things */
048   fork();                                         048   fork();
049   fork();                                         049   fork();
050                                                   050   
051   _sos_syscall1(4004, (unsigned)"Initial");       051   _sos_syscall1(4004, (unsigned)"Initial");
052   munmap(zoup, 10*4096);                          052   munmap(zoup, 10*4096);
053   zoup += 10*4096;                                053   zoup += 10*4096;
054   _sos_syscall1(4004, (unsigned)"After munmap     054   _sos_syscall1(4004, (unsigned)"After munmap Low");
055                                                   055 
056   munmap(zoup-4096, 2*4096);                      056   munmap(zoup-4096, 2*4096);
057   zoup += 4096;                                   057   zoup += 4096;
058   _sos_syscall1(4004, (unsigned)"After munmap     058   _sos_syscall1(4004, (unsigned)"After munmap Before Low");
059                                                   059 
060   munmap(zoup-4096, 4096);                        060   munmap(zoup-4096, 4096);
061   _sos_syscall1(4004, (unsigned)"After munmap     061   _sos_syscall1(4004, (unsigned)"After munmap Before Low (bis)");
062                                                   062 
063   munmap(zoup + 1024*1024, 4096);                 063   munmap(zoup + 1024*1024, 4096);
064   _sos_syscall1(4004, (unsigned)"After munmap     064   _sos_syscall1(4004, (unsigned)"After munmap middle");
065                                                   065 
066   munmap(zoup + 1024*1024, 4096);                 066   munmap(zoup + 1024*1024, 4096);
067   _sos_syscall1(4004, (unsigned)"After munmap     067   _sos_syscall1(4004, (unsigned)"After munmap middle (bis)");
068                                                   068 
069   munmap(zoup + 8*1024*1024 - 11*4096 - 4096,     069   munmap(zoup + 8*1024*1024 - 11*4096 - 4096, 4096);
070   _sos_syscall1(4004, (unsigned)"After munmap     070   _sos_syscall1(4004, (unsigned)"After munmap High");
071                                                   071 
072   munmap(zoup + 8*1024*1024 - 11*4096 - 2*4096    072   munmap(zoup + 8*1024*1024 - 11*4096 - 2*4096, 3*4096);
073   _sos_syscall1(4004, (unsigned)"After munmap     073   _sos_syscall1(4004, (unsigned)"After munmap Past High");
074                                                   074 
075   munmap((void*)0x40000000, 0x10000000);          075   munmap((void*)0x40000000, 0x10000000);
076   _sos_syscall1(4004, (unsigned)"After munmap     076   _sos_syscall1(4004, (unsigned)"After munmap Over everything");
077                                                   077 
078   munmap((void*)0x40000000, 0x10000000);          078   munmap((void*)0x40000000, 0x10000000);
079   _sos_syscall1(4004, (unsigned)"After munmap     079   _sos_syscall1(4004, (unsigned)"After munmap Over everything (bis)");
080                                                   080 
081   return 0;                                       081   return 0;
082 }                                                 082 }
                                                      

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