On 12/6/23 1:41 PM, Warner Losh wrote:
Hey John,

On Wed, Dec 6, 2023 at 2:13 PM John Baldwin <[email protected]> wrote:

On 12/6/23 1:02 PM, Warner Losh wrote:
On Wed, Dec 6, 2023, 1:04 PM John Baldwin <[email protected]> wrote:

On 2/25/23 9:37 AM, Warner Losh wrote:
The branch main has been updated by imp:

URL:

https://cgit.FreeBSD.org/src/commit/?id=773c13c686e4b6ae9dbbc150b342b82c3f47d73a

commit 773c13c686e4b6ae9dbbc150b342b82c3f47d73a
Author:     Mina Galić <[email protected]>
AuthorDate: 2023-02-25 17:31:58 +0000
Commit:     Warner Losh <[email protected]>
CommitDate: 2023-02-25 17:35:43 +0000

       kldxref: skip .pkgsave files

       This should help people transitioning from traditional setups to
pkgbase
       experience a lot less friction.

       We do this by skipping all files containing two dots.

       Reviewed by: imp
       Pull Request: https://github.com/freebsd/freebsd-src/pull/661
       Differential Revision: https://reviews.freebsd.org/D27959

This restriction is too broad and omits all of the modern wifi firmware
klds from linker.hints, e.g.

/boot/kernel/iwlwifi-3160-17.ucode.ko
/boot/kernel/iwlwifi-3168-29.ucode.ko
/boot/kernel/iwlwifi-7260-17.ucode.ko
/boot/kernel/iwlwifi-7265-17.ucode.ko
/boot/kernel/iwlwifi-7265D-29.ucode.ko
/boot/kernel/iwlwifi-8000C-36.ucode.ko
/boot/kernel/iwlwifi-8265-36.ucode.ko
/boot/kernel/iwlwifi-9000-pu-b0-jf-b0-46.ucode.ko
/boot/kernel/iwlwifi-9260-th-b0-jf-b0-46.ucode.ko
/boot/kernel/iwlwifi-Qu-b0-hr-b0-77.ucode.ko
/boot/kernel/iwlwifi-Qu-b0-jf-b0-77.ucode.ko
/boot/kernel/iwlwifi-Qu-c0-hr-b0-77.ucode.ko
/boot/kernel/iwlwifi-Qu-c0-jf-b0-77.ucode.ko
/boot/kernel/iwlwifi-QuZ-a0-hr-b0-77.ucode.ko
/boot/kernel/iwlwifi-QuZ-a0-jf-b0-77.ucode.ko
/boot/kernel/iwlwifi-cc-a0-77.ucode.ko
/boot/kernel/iwlwifi-so-a0-gf-a0-83.ucode.ko
/boot/kernel/iwlwifi-so-a0-gf-a0.pnvm.ko
/boot/kernel/iwlwifi-so-a0-gf4-a0-83.ucode.ko
/boot/kernel/iwlwifi-so-a0-gf4-a0.pnvm.ko
/boot/kernel/iwlwifi-so-a0-hr-b0-81.ucode.ko
/boot/kernel/iwlwifi-so-a0-jf-b0-77.ucode.ko
/boot/kernel/iwlwifi-ty-a0-gf-a0-83.ucode.ko
/boot/kernel/iwlwifi-ty-a0-gf-a0.pnvm.ko
/boot/kernel/rtw8723d_fw.bin.ko
/boot/kernel/rtw8821c_fw.bin.ko
/boot/kernel/rtw8822b_fw.bin.ko
/boot/kernel/rtw8822c_fw.bin.ko
/boot/kernel/rtw8822c_wow_fw.bin.ko

all match this pattern and are skipped.

I'm busy rewriting a bunch of kldxref to be a cross tool using libelf,
but I think here you want to probably revert this and just add pkgsave
to the list of "known bad" suffixes.


Sure. Any reason to not just require .ko? Or do we have to index the
kernel
too?

We do index the kernel as well, yes.  However, we could probably get by
with "kernel" and ends in ".ko" as a valid set of files.  This would also
avoid bogusly warning about linker.hints not being a valid ELF file on
re-runs if you use -v.


Yea, that sounds good. I'll code it up and add you to the review.

But why does it matter for these? Firmware is usually loaded by filename
and need not be elf... or are these wrapped in elf sections...

I haven't noticed it breaking my linuxkpi wifi driver that have autoloaded
firmware...

Hmm, afaik firmwares are loaded by "module name" where a firmware .ko contains
one or more of the firmware modules.  We happen today to generally only
store one module in a single .ko (and with the same name), and in that case
kern_linker.c may fallback to just trying to load "foo".ko if it doesn't find
an entry in linker.hints, but if that is why it is working that is certainly
by happy accident.

I only found this by comparing klxref output btw on a stale i386 VM between
the native kldxref in the VM (before this change) and my cross-arch version
of kldxref.

--
John Baldwin


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