Thread (19 messages) 19 messages, 3 authors, 2021-10-30

Re: [PATCH v5] kallsyms: new /proc/kallmodsyms with builtin modules

From: Kees Cook <hidden>
Date: 2021-09-29 23:34:43
Also in: lkml

On Wed, Sep 29, 2021 at 10:51:47PM +0100, Nick Alcock wrote:
It would be useful if there were a mapping between kernel symbol and module
name that only changed when the kernel source code is changed.  This mapping
should not change simply because a module becomes built into the kernel.

It might also be useful if there were reliable symbol size information to
determine whether an address is within a symbol or outside it, especially
given that there could be huge gaps between symbols.
This is a pretty cool series, but I'm left wondering "for what reason?" :)
Perhaps I missed the specific rationale; there was a lot to run. ;)

It would be useful, sure, but is there something that does, in fact,
need this, or would like this if it were available? Since this provides
a userspace API, what would be consuming that API? For example, when
Syscall User Dispatch was added, it was clear it was for Wine[1].

-Kees

[1] https://lore.kernel.org/lkml/160690190770.3364.5119373826178425644.tip-bot2@tip-bot2/ (local)

-- 
Kees Cook
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