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/*
* SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
unsigned long, prot, unsigned long, pgoff, unsigned long, flags)
*/
#include <stdlib.h>
#include <asm/mman.h>
#include "arch.h"
#include "maps.h"
#include "random.h"
#include "sanitise.h"
#include "shm.h"
static void sanitise_remap_file_pages(int childno)
{
struct map *map;
size_t size;
map = common_set_mmap_ptr_len(childno);
/* We just want to remap a part of the mapping. */
size = rand() % map->size;
shm->a2[childno] = size;
/* "The prot argument must be specified as 0" */
shm->a3[childno] = 0;
/* Pick a random pgoff. */
shm->a4[childno] = rand() & (size / page_size);
}
struct syscall syscall_remap_file_pages = {
.name = "remap_file_pages",
.num_args = 5,
.arg1name = "start",
.arg1type = ARG_MMAP,
.arg2name = "size",
.arg3name = "prot",
.arg4name = "pgoff",
.arg5name = "flags",
.arg5type = ARG_LIST,
.arg5list = {
.num = 1,
.values = { MAP_NONBLOCK },
},
.group = GROUP_VM,
.sanitise = sanitise_remap_file_pages,
};
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