On Tue, 20 Oct 2020 04:32:08 PDT (-0700), [email protected] wrote:
On Fri, Oct 16, 2020 at 05:26:37PM -0700, Palmer Dabbelt wrote:
From: Palmer Dabbelt <[email protected]>
I was going to copy this but I didn't want to chase around the build
system stuff so I did it a different way.
How did you end up doing it? I remember trying to parse the ELF object at
one time of day and not getting very far.
Mine really isn't any cleaner: I use nm and sed to produce an assembler file
full of absolute symbols, which I compile to produce the object. That way I
don't need a header file, which means I don't need to mess around with build
ordering or change any of the other code (which was already using symbols).
I don't really like this whole thing we do where we just assume that symbols
with a small offset from absolute address zero. We're sort of depending on
that for undefined weak symbols, but that's only for actually zero not almost
zero. Given that, I figured it'd be easier to just do it this way rather than
trying to mess with build stuff.
I probably wouldn't bother changing unless there's something actively bad about
that build stuff (I didn't really look).
