27 Nov
2017
27 Nov
'17
7:30 p.m.
Lawrence Stewart wrote:
Noel Chiappa wrote:
Or if a statically allocated space is ok, just set your pages to rwx in
the executable image file.
Programs which emit these little 'custom
code fragments' (I prefer
that term, since they aren't really 'self-modifying code' - which I
define as 'a program which _changes_ _existing_ instructions) must
have some way of having a chunk of memory into which they can write,
but which can also be executed.
In POSIX systems, the mprotect(2) syscall can set execute permissions.