diff --git a/arch/x86/mm/vma.c b/arch/x86/mm/vma.c new file mode 100644 index 000000000..0544a814d --- /dev/null +++ b/arch/x86/mm/vma.c @@ -0,0 +1,49 @@ +/* + * 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 +#include + +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; +}