https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=239194
Bug ID: 239194
Summary: gcov-enabled kernel can't load modules
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Many People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
The gcov support added to the kernel in r344487 doesn't work with modules.
Everything seems to be working for the kernel itself, but when I try to load a
module I get this error:
> sudo kldload fdescfs
kldload: an error occurred while loading module fdescfs. Please check dmesg(8)
for more details.
> tail -n2 /var/log/messages
Jul 13 20:14:08 fbsd-head kernel: kldload: fdescfs.ko: lost base for reltab
Jul 13 20:14:08 fbsd-head kernel: linker_load_file: /boot/kernel.old/fdescfs.ko
- unsupported file type
I don't observe the kldload failure when I build a GENERIC kernel using the
amd64-gcc cross toolchain. I only see it when using the GCOV kernel. If I cd
to /usr/src/sys/modules/whatever and build the module there, then I _can_ load
it. However, coverage data is not collected.
> sudo kldload /boot/modules/fusefs.ko
> uname -a
FreeBSD fbsd-head.lauralan.noip.me 13.0-CURRENT FreeBSD 13.0-CURRENT r349977
GCOV amd64
> cat sys/amd64/conf/GCOV
include GENERIC
ident GCOV
options LINDEBUGFS
options GCOV
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