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/*-
* Copyright 2013 Alexander Peslyak
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
#ifdef HAVE_SYS_MMAN_H
# include <sys/mman.h>
#endif
#include <errno.h>
#include <stdlib.h>
#include "crypto_scrypt.h"
#include "runtime.h"
#if !defined(MAP_ANON) && defined(MAP_ANONYMOUS)
# define MAP_ANON MAP_ANONYMOUS
#endif
void *
alloc_region(escrypt_region_t * region, size_t size)
{
uint8_t * base, * aligned;
#if defined(MAP_ANON) && defined(HAVE_MMAP)
if ((base = (uint8_t *) mmap(NULL, size, PROT_READ | PROT_WRITE,
#ifdef MAP_NOCORE
MAP_ANON | MAP_PRIVATE | MAP_NOCORE,
#else
MAP_ANON | MAP_PRIVATE,
#endif
-1, 0)) == MAP_FAILED)
base = NULL; /* LCOV_EXCL_LINE */
aligned = base;
#elif defined(HAVE_POSIX_MEMALIGN)
if ((errno = posix_memalign((void **) &base, 64, size)) != 0)
base = NULL;
aligned = base;
#else
base = aligned = NULL;
if (size + 63 < size)
errno = ENOMEM;
else if ((base = (uint8_t *) malloc(size + 63)) != NULL) {
aligned = base + 63;
aligned -= (uintptr_t)aligned & 63;
}
#endif
region->base = base;
region->aligned = aligned;
region->size = base ? size : 0;
return aligned;
}
static inline void
init_region(escrypt_region_t * region)
{
region->base = region->aligned = NULL;
region->size = 0;
}
int
free_region(escrypt_region_t * region)
{
if (region->base) {
#if defined(MAP_ANON) && defined(HAVE_MMAP)
if (munmap(region->base, region->size))
return -1; /* LCOV_EXCL_LINE */
#else
free(region->base);
#endif
}
init_region(region);
return 0;
}
int
escrypt_init_local(escrypt_local_t * local)
{
init_region(local);
return 0;
}
int
escrypt_free_local(escrypt_local_t * local)
{
return free_region(local);
}
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