__ptr_t mmap(__ptr_t addr, size_t len, int prot, int flags, int fd, __off_t offset)
{
unsigned long page_size = sysconf(_SC_PAGESIZE);
unsigned long pgoff;
if (offset & (page_size - 1)) {
__set_errno(EINVAL);
return MAP_FAILED;
}
pgoff = (unsigned long)offset >> (31 - __builtin_clz(page_size));
return mmap2(addr, len, prot, flags, fd, pgoff);
}
int main(int argc, char *argv[])
{
char *msg;
int lc;
void *map, *remap;
off_t pgoff;
#if __WORDSIZE != 32
tst_brkm(TCONF, NULL, "test is designed for 32-bit system only.");
#endif
msg = parse_opts(argc, argv, NULL, NULL);
if (msg != NULL)
tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
pgsz = sysconf(_SC_PAGE_SIZE);
setup();
for (lc = 0; TEST_LOOPING(lc); lc++) {
tst_count = 0;
fd = open(TESTFILE, O_RDWR);
if (fd == -1)
tst_brkm(TBROK | TERRNO, NULL, "open %s", TESTFILE);
pgoff = ULONG_MAX - 1;
map = mmap2(NULL, pgsz, PROT_READ | PROT_WRITE, MAP_PRIVATE,
fd, pgoff);
if (map == MAP_FAILED)
tst_brkm(TBROK | TERRNO, cleanup, "mmap2");
remap = mremap(map, pgsz, 2 * pgsz, 0);
if (remap == MAP_FAILED) {
if (errno == EINVAL)
tst_resm(TPASS, "mremap failed as expected.");
else
tst_resm(TFAIL | TERRNO, "mremap");
munmap(map, pgsz);
} else {
tst_resm(TFAIL, "mremap succeeded unexpectedly.");
munmap(remap, 2 * pgsz);
}
close(fd);
}
cleanup();
tst_exit();
}