ladybird/Userland/Utilities/purge.cpp
Andreas Kling e87eac9273 Userland: Add LibSystem and funnel all syscalls through it
This achieves two things:

- Programs can now intentionally perform arbitrary syscalls by calling
  syscall(). This allows us to work on things like syscall fuzzing.

- It restricts the ability of userspace to make syscalls to a single
  4KB page of code. In order to call the kernel directly, an attacker
  must now locate this page and call through it.
2021-02-05 12:23:39 +01:00

60 lines
2.3 KiB
C++

/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <LibCore/ArgsParser.h>
#include <serenity.h>
#include <stdio.h>
#include <string.h>
int main(int argc, char** argv)
{
int mode = 0;
bool purge_all_volatile = false;
bool purge_all_clean_inode = false;
Core::ArgsParser args_parser;
args_parser.add_option(purge_all_volatile, "Mode PURGE_ALL_VOLATILE", nullptr, 'v');
args_parser.add_option(purge_all_clean_inode, "Mode PURGE_ALL_CLEAN_INODE", nullptr, 'c');
args_parser.parse(argc, argv);
if (!purge_all_volatile && !purge_all_clean_inode)
purge_all_volatile = purge_all_clean_inode = true;
if (purge_all_volatile)
mode |= PURGE_ALL_VOLATILE;
if (purge_all_clean_inode)
mode |= PURGE_ALL_CLEAN_INODE;
int purged_page_count = purge(mode);
if (purged_page_count < 0) {
perror("purge");
return 1;
}
printf("Purged page count: %d\n", purged_page_count);
return 0;
}