Re: [Tinycc-devel] Fix boundschecking for signal/sigaction/fork

[grischka]

Herman ten Brugge via Tinycc-devel wrote:
> +#if 0 /* does not work with fork */
>      ptr = mmap (NULL, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
>      prx = mmap (NULL, size, PROT_READ|PROT_EXEC, MAP_SHARED, fd, 0);
> +#else
> +    ptr = prx = mmap (NULL, size, PROT_READ|PROT_WRITE|PROT_EXEC,
> MAP_PRIVATE, fd, 0);
> +#endif

Might depend on what selinux features you have enabled but IIRC
alpine musl for example did not allow to run code from memory
that once was allocated as writable.

--- grischka