RTS linker maps code as writable
GHC's RTS linker maps executable code in writable pages, representing a significant potential exploit point for arbitrary code execution. OpenBSD disallows running program that do this by default.
Instead we should first map pages as
PROT_READ | PROT_WRITE, perform any necessary relocations (which requires writing), and then
mprotect it to
PROT_READ | PROT_EXEC.
To find the relevant code grep for
PROT_EXEC in the