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- /* -*- mode:c; c-file-style:"k&r"; c-basic-offset: 4; tab-width:4; indent-tabs-mode:nil; mode:auto-fill; fill-column:78; -*- */
- /* vim: set ts=4 sw=4 et tw=78 fo=cqt wm=0: */
- /* Copyright (C) 2014 OSCAR lab, Stony Brook University
- This file is part of Graphene Library OS.
- Graphene Library OS is free software: you can redistribute it and/or
- modify it under the terms of the GNU General Public License
- as published by the Free Software Foundation, either version 3 of the
- License, or (at your option) any later version.
- Graphene Library OS is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
- /*
- * db_memory.c
- *
- * This files contains APIs that allocate, free or protect virtual memory.
- */
- #include "pal_defs.h"
- #include "pal_linux_defs.h"
- #include "pal.h"
- #include "pal_internal.h"
- #include "pal_linux.h"
- #include "pal_error.h"
- #include "pal_debug.h"
- #include "api.h"
- #include <asm/mman.h>
- int _DkVirtualMemoryAlloc (void ** paddr, size_t size, int alloc_type,
- int prot)
- {
- void * addr = *paddr, * mem = addr;
- int flags = HOST_FLAGS(alloc_type, prot|PAL_PROT_WRITECOPY);
- prot = HOST_PROT(prot);
- /* The memory should have MAP_PRIVATE and MAP_ANONYMOUS */
- flags |= MAP_ANONYMOUS|(addr ? MAP_FIXED : 0);
- mem = (void *) ARCH_MMAP(addr, size, prot, flags, -1, 0);
- if (IS_ERR_P(mem))
- return unix_to_pal_error(ERRNO_P(mem));
- *paddr = mem;
- return 0;
- }
- int _DkVirtualMemoryFree (void * addr, size_t size)
- {
- int ret = INLINE_SYSCALL(munmap, 2, addr, size);
- return IS_ERR(ret) ? unix_to_pal_error(ERRNO(ret)) : 0;
- }
- int _DkVirtualMemoryProtect (void * addr, size_t size, int prot)
- {
- int ret = INLINE_SYSCALL(mprotect, 3, addr, size, HOST_PROT(prot));
- return IS_ERR(ret) ? unix_to_pal_error(ERRNO(ret)) : 0;
- }
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