Re: [PATCH 7/7] DWARF: add the config option

From: Linus Torvalds
Date: Sat May 20 2017 - 19:29:53 EST

On Sat, May 20, 2017 at 4:00 PM, Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
> hjl already posted an example of the kinds of horrors glibc does to do
> things "right".

Side note: we'd hopefully/presumably never need anything _that_
disgusting for the kernel, so hjl's example is probably an extreme

But even when we just did the pushq/popq_cfi macros etc to try to have
simple and reasonably legible annotations for the common cases, it got
pretty ugly.

It wasn't that extreme glibc kind of "50 lines of ugly for two
instructions of code", but it was pretty bad. And as far as I know we
never even tried to annotate places where we did "pushf/pop %reg" in
inline asm (for saving/restoring flags)