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Revert "Use anonymous file instead of regular file to back mmap" 

This reverts commit 935d8169b8,
because two anonymous mappings would have different content,
while they must have the same one.
master
Iavael 2014-01-12 09:26:41 +04:00
parent f42a02efda
commit 8e724128e8
1 changed files with 12 additions and 5 deletions
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17
tccrun.c
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@ -59,18 +59,25 @@ LIBTCCAPI int tcc_relocate(TCCState *s1, void *ptr)
return ret;
#ifdef HAVE_SELINUX
{ /* Use mmap instead of malloc for Selinux. */
{ /* Use mmap instead of malloc for Selinux. Ref:
http://www.gnu.org/s/libc/manual/html_node/File-Size.html */
char tmpfname[] = "/tmp/.tccrunXXXXXX";
int fd = mkstemp (tmpfname);
s1->mem_size = ret;
unlink (tmpfname);
ftruncate (fd, s1->mem_size);
s1->write_mem = mmap (NULL, ret, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
MAP_SHARED, fd, 0);
if (s1->write_mem == MAP_FAILED)
tcc_error("mmap not writeable");
tcc_error("/tmp not writeable");
s1->runtime_mem = mmap (NULL, ret, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
MAP_SHARED, fd, 0);
if (s1->runtime_mem == MAP_FAILED)
tcc_error("mmap not executable");
tcc_error("/tmp not executable");
ret = tcc_relocate_ex(s1, s1->write_mem);
}