Re: Generating init and fini functions

[Hollis Blanchard]

On Nov 8, 2005, at 5:18 PM, Marco Gerards wrote:
> At the moment I am working on things that irritate me while I am
> working on GRUB.  One thing is writing a duplicate _init and _fini
> function (duplicate because it already is added in GRUB_MOD_INIT).
> And another thing that irritates me is that I have to add a init line
> to grub-emu.
>
> Here is a patch that solves that.  First I removed all the init and
> fini functions and let GRUB_MOD_INIT and GRUB_MOD_FINI generate these
> functions.  I have added a script that creates a header file with all
> the function prototypes for these generated functions.  And finally I
> have added a script that can generate a C file with the functions
> `grub_init_all' and `grub_fini_all'.

This is good. :)

The way Linux does this, avoiding shell scripting, is by inserting 
function pointers into a special ELF section, and that section is 
looped over using linker symbols defining the beginning and end.

On the other hand, I seem to recall that some toolchain component (GDB 
perhaps) uses shell scripting like this: it finds all functions named 
in a particular way and produces code to call them. I can live with 
that.

-Hollis