MPROTECT(2) | System Calls Manual | MPROTECT(2) |
mprotect
—
#include <sys/mman.h>
int
mprotect
(void
*addr, size_t len,
int prot);
mprotect
system call changes the specified pages to
have protection prot. Not all implementations will
guarantee protection on a page basis; the granularity of protection changes
may be as large as an entire region.
The protections (region accessibility) are specified in the prot argument by OR'ing the following values:
PROT_EXEC
PROT_READ
PROT_WRITE
PROT_NONE
EACCES
]The PROT_EXEC
flag was attempted on
pages which belong to a file system mounted with the
NOEXEC
flag.
The new protection is less restrictive than the protection originally set with mmap(2).
PaX mprotect restrictions prohibit the requested protection.
EINVAL
]ENOMEM
]mprotect
function first appeared in
4.4BSD.
April 27, 2017 | NetBSD 9.0 |