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add missing file for architecture dependent vma support

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Stefan Lankes 2017-03-06 23:37:55 +01:00
parent 8f9430f3fe
commit 1269a71439
1 changed files with 49 additions and 0 deletions
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arch/x86/mm/vma.c Normal file
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/*
* Copyright (c) 2014, Steffen Vogel, RWTH Aachen University
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* 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 REGENTS 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 <hermit/vma.h>
#include <asm/multiboot.h>
int vma_arch_init(void)
{
int ret = 0;
if (mb_info) {
ret = vma_add((size_t)mb_info & PAGE_MASK, ((size_t)mb_info & PAGE_MASK) + PAGE_SIZE, VMA_READ|VMA_WRITE);
if (BUILTIN_EXPECT(ret, 0))
goto out;
if ((mb_info->cmdline & PAGE_MASK) != ((size_t) mb_info & PAGE_MASK)) {
ret = vma_add((size_t)mb_info->cmdline & PAGE_MASK, ((size_t)mb_info->cmdline & PAGE_MASK) + PAGE_SIZE, VMA_READ|VMA_WRITE);
if (BUILTIN_EXPECT(ret, 0))
goto out;
}
}
out:
return ret;
}